JP4318673B2 - How to replace fluid piping system equipment - Google Patents

How to replace fluid piping system equipment Download PDF

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JP4318673B2
JP4318673B2 JP2005219480A JP2005219480A JP4318673B2 JP 4318673 B2 JP4318673 B2 JP 4318673B2 JP 2005219480 A JP2005219480 A JP 2005219480A JP 2005219480 A JP2005219480 A JP 2005219480A JP 4318673 B2 JP4318673 B2 JP 4318673B2
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valve
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雅士 田淵
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Waterworks Technology Development Organization Co Ltd
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本発明は、水道配管系統等の流体配管系統中に接続されているバタフライ弁や空気弁、消火栓等の機器の交換方法で、特に、機器の上流側に、締結具にて脱着自在に密封状態で締付け連結される連結部が設けられている流体配管系において、管内流体の流れを断たない不断流状態で前記機器を指定機器に取り替える流体配管系の機器交換方法に関する。   The present invention is a method for replacing devices such as butterfly valves, air valves, and fire hydrants connected in a fluid piping system such as a water supply piping system, in particular, in a state of being sealed detachably by a fastener on the upstream side of the device. The present invention relates to a device replacement method for a fluid piping system in which the device is replaced with a designated device in an uninterrupted flow state in which the flow of fluid in the tube is not interrupted in a fluid piping system provided with a connecting portion to be tightened and connected.

この種の流体配管系、例えば、図１に示すように、流体管の一例である水道管の途中に形成された分岐管部の連結フランジ部（連結部の一例）に、機器の一例であるバタフライ弁の下端に形成された連結フランジ部（連結部の一例）を、締結具にて脱着自在に密封状態で締付け連結するとともに、バタフライ弁の上端に形成された連結フランジ部（連結部の一例）に、機器の一例である空気弁の下端に形成された連結フランジ部（連結部の一例）を、締結具にて脱着自在に密封状態で締付け連結してある水道配管系においては、耐久年数に至った又は漏水や故障の発生したバタフライ弁及び空気弁を選定された指定の補修弁及び空気弁と交換する必要がある。   This kind of fluid piping system, for example, as shown in FIG. 1, is an example of equipment in a connecting flange portion (an example of a connecting portion) of a branch pipe portion formed in the middle of a water pipe that is an example of a fluid pipe. The connecting flange portion (an example of the connecting portion) formed at the lower end of the butterfly valve is detachably tightened and connected with a fastener in a sealed state, and the connecting flange portion (an example of the connecting portion) formed at the upper end of the butterfly valve ) In the water pipe system in which the connecting flange part (an example of the connecting part) formed at the lower end of the air valve which is an example of the device is detachably tightened and connected with a fastener in a sealed state, It is necessary to replace the butterfly valve and the air valve that have reached the point where water leakage or failure has occurred with the selected designated repair valve and air valve.

この場合、バタフライ弁よりも上流側の分岐管部内において流路を閉塞するための閉塞手段を備えた流路閉塞装置を、空気弁が取り外されたバタフライ弁の上側連結フランジ部に密封状態で固定連結し、この流路閉塞装置の閉塞手段を分岐管部内の流路遮断位置に送り込む必要があるが、バタフライ弁内には弁体やこれを回動自在に支持する両弁棒等が存在しているため、その状態では流路閉塞装置を使用することができない。   In this case, the flow path closing device provided with the closing means for closing the flow path in the branch pipe portion upstream from the butterfly valve is fixed in a sealed state to the upper connecting flange portion of the butterfly valve from which the air valve has been removed. It is necessary to connect and feed the closing means of this flow path closing device to the flow path blocking position in the branch pipe section, but there are valve bodies and both valve rods etc. that rotatably support this in the butterfly valve. Therefore, the channel blockage device cannot be used in that state.

そこで、特許文献１に示す技術を利用して、流路閉塞装置による流路閉塞工程前において、空気弁が取り外されたバタフライ弁の上側連結フランジ部に、開閉弁を介して穿孔装置を固定連結し、この穿孔装置のホールソーでバタフライ弁の両弁棒及び弁体を切断除去し、穿孔装置を取り外した開閉弁の上側連結フランジ部に、閉塞手段を備えた流路閉塞装置を取付け、開閉弁及びバタフライ弁を通して水道管の分岐管部内に差し入れられた閉塞手段により流路を閉塞する工程を追加する方法が考えられる。   Therefore, using the technique shown in Patent Document 1, the perforation device is fixedly connected to the upper connection flange portion of the butterfly valve from which the air valve has been removed via the on-off valve before the flow passage closing step by the flow passage closing device. Then, both the valve stem and the valve body of the butterfly valve are cut and removed by the hole saw of this punching device, and a flow path closing device having a closing means is attached to the upper connecting flange portion of the opening / closing valve from which the punching device has been removed. A method of adding a step of closing the flow path by the closing means inserted into the branch pipe portion of the water pipe through the butterfly valve is conceivable.

この交換方法では、閉塞手段による流路閉塞後において、流路閉塞装置の少なくとも閉塞手段を流路閉塞状態で残したまま分岐管部の連結フランジ部から開閉弁及びバタフライ弁を取り外したのち、前記分岐管部の連結フランジ部に指定の補修弁及び空気弁開閉弁を密封状態で連結し、前記流路遮断装置の残置構成部材を指定の補修弁の取付け後に撤去することになる。   In this replacement method, after the flow path is closed by the closing means, the on-off valve and the butterfly valve are removed from the connecting flange portion of the branch pipe section while leaving at least the closing means of the flow path closing device in the flow path closed state, The specified repair valve and the air valve opening / closing valve are connected in a sealed state to the connecting flange portion of the branch pipe portion, and the remaining component of the flow path shut-off device is removed after the specified repair valve is attached.

また、特許文献２に示す技術を利用して、水道管の分岐管部に凍結装置を装着して、この分岐管部内の流体を凍結させて流体の流れを遮断したのち、分岐管部の連結フランジ部から空気弁及びバタフライ弁を取り外し、分岐管部の連結フランジ部に指定の補修弁及び空気弁開閉弁を密封状態で連結する方法が考えられる。   In addition, using the technique shown in Patent Document 2, a freezing device is attached to the branch pipe portion of the water pipe, and after the fluid in the branch pipe portion is frozen to shut off the flow of the fluid, the connection of the branch pipe portion is performed. A method is conceivable in which the air valve and the butterfly valve are removed from the flange portion, and the specified repair valve and the air valve opening / closing valve are connected in a sealed state to the connecting flange portion of the branch pipe portion.

特開２００４−２３９４０９号公報JP 2004-239409 A 特許第３６３６８００号公報Japanese Patent No. 3636800

前者の交換方法では、穿孔装置のホールソーでバタフライ弁の両弁棒及び弁体を切断除去する必要があるため、工事が大掛かりになるとともに作業工程数が増加し、施工コストの高騰化と工期の増大を招来する不都合がある。
特に、前記バタフライ弁が開き状態で故障している場合には、バタフライ弁から空気弁を取り外した瞬間にバタフライ弁から多量の水道水が噴出するため、この交換方法を採用することはできない。 In the former replacement method, both the valve stem and valve body of the butterfly valve need to be cut and removed with the hole saw of the drilling device, which requires a large construction and increases the number of work processes. There is an inconvenience that causes an increase.
In particular, when the butterfly valve is in an open state and fails, a large amount of tap water is ejected from the butterfly valve at the moment when the air valve is removed from the butterfly valve, so this replacement method cannot be employed.

後者の交換方法は、水道管内の水道水の流れを維持したまま分岐管部内の流体を凍結させるため、凍結状態を外部から確認することができず、しかも、凍結までに多くの時間を要する割りに凍結遮断性能の信頼性が低く、バタフライ弁から空気弁を取り外した瞬間又は分岐管部からバタフライ弁を取り外した瞬間に多量の水道水が噴出する可能性がある。   In the latter replacement method, the fluid in the branch pipe section is frozen while maintaining the flow of tap water in the water pipe, so the frozen state cannot be confirmed from the outside, and moreover it takes a long time to freeze. In addition, the reliability of the freeze-blocking performance is low, and a large amount of tap water may be ejected at the moment when the air valve is removed from the butterfly valve or the moment when the butterfly valve is removed from the branch pipe.

本発明は、上述の実状に鑑みて為されたものであって、その主たる課題は、バタフライ弁や空気弁等の機器が有する分解機能を利用して、機器の交換作業を漏水の無い又は少ない状態で能率良くコスト面で有利に行うことのできる流体配管系の機器交換方法を提供する点にある。   The present invention has been made in view of the above-described circumstances, and its main problem is to use the decomposition function of devices such as a butterfly valve and an air valve, so that the replacement work of the device has little or no leakage. It is in the point of providing the apparatus replacement | exchange method of the fluid piping type | system | group which can be performed efficiently and cost-effectively in a state.

本発明による第１の特徴構成は、流体配管系統中に接続され、且つ、流路軸芯方向で分離可能に連結された複数の機器ケースを備えた機器の上流側に、締結具にて脱着自在に密封状態で締付け連結される連結部が設けられている流体配管系において、管内流体の流れを断たない不断流状態で前記機器を指定機器に取り替える流体配管系の機器交換方法であって、以下の１）〜３）のステップを備えていることを特徴とする。
１）前記締結具を緩み操作して両連結部間に隙間を現出し、この隙間を通して仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断する。
２）前記機器を、連結部側の残置機器ケースを残して分解し、該残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側に挿入して流路を閉塞可能な閉塞手段と、当該閉塞手段を格納可能な格納室を有する蓋体とを備えた流路閉塞装置の前記蓋体を、前記残置機器ケースの接合部に直接又は連結筒を介して密封状態で取付け、前記両連結部間から仕切板弁を流路開放位置に操作したのち、前記蓋体内の閉塞手段を、残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側の流路閉塞位置に送り込んで、前記両連結部よりも上流側の流路を閉塞する。
３）前記流路閉塞装置の少なくとも閉塞手段を流路閉塞位置に残置したまま、前記残置機器ケース、及び流路閉塞装置の蓋体を含む、前記残置機器ケースの下流側に連結されたものを前記連結部から取り外したのち、前記連結部に開閉弁を密封状態で取付け、該開閉弁の下流側に、前記流路閉塞装置の蓋体を密封状態で取付け、前記開閉弁を開き操作して流路閉塞位置に残置されていた閉塞手段を蓋体の格納室内に格納し、前記開閉弁を閉じ操作する。その後、前記開閉弁から前記蓋体を含む流路遮断装置の残置構成部材を撤去するとともに、前記開閉弁に指定機器を密封状態で連結し、前記仕切板弁を流路閉塞後の適宜時期に撤去する。 A first characteristic configuration according to the present invention is a device that is connected to a fluid piping system and that is detachable by a fastener on the upstream side of a device that includes a plurality of device cases that are separably coupled in the flow axis direction. In a fluid piping system provided with a connecting portion that is freely tightened and connected in a sealed state, a device replacement method for a fluid piping system in which the device is replaced with a designated device in a continuous flow state without interrupting the flow of fluid in the pipe. The following steps 1) to 3) are provided.
1) The fastener is loosened to reveal a gap between the two connecting portions, and the flow path is blocked between the two connecting portions by inserting the partition plate valve into the flow blocking position through the gap.
2) Closure means capable of closing the flow path by disassembling the device leaving a remaining device case on the connecting portion side , and inserting the device into the upstream side of the flow passage blocking position by the partition plate valve through the interior of the remaining device case. When, the lid of the passage closing device provided with a lid having a storage chamber capable of storing said closure means, mounted in a sealed state via a direct or connecting tube to the joints of the leaving device case, the After the partition plate valve is operated to the flow path open position from between the two connecting portions, the closing means in the lid body is passed through the inside of the remaining device case to the flow path closed position upstream of the flow path blocking position by the partition plate valve. Then, the flow path on the upstream side of both the connecting portions is closed.
3) What is connected to the downstream side of the remaining equipment case including the remaining equipment case and the lid of the flow path closing device while leaving at least the closing means of the flow path closing device at the flow path closing position. After removal from the connecting portion, mounted off valve sealingly to the connecting portion, on the downstream side of the opening and closing valve, the cover of the channel closure device mounted sealingly, by operating to open the on-off valve The closing means left at the channel closing position is stored in the storage chamber of the lid, and the on-off valve is closed. Thereafter, the remaining structural member of the flow path shut-off device including the lid is removed from the on-off valve, a designated device is connected to the on- off valve in a sealed state, and the partition plate valve is connected at an appropriate time after the flow path is closed. Remove .

上記特徴構成によれば、耐久年数に至った又は漏水や故障の発生した流体配管系統中の機器を指定の機器に取り替える必要が生じたとき、この取替え対象機器の上流側の両連結部同士を締め付け連結している締結具を緩み操作して、両連結部間に発生した隙間に仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断することができるから、凍結工法に比して流路を短時間で確実に遮断することができる。
しかも、仕切板弁による流路遮断後に機器を分解して、連結部側に分解された一部の機器ケースを残置することにより、この残置機器ケースの接合部を利用して、それよりも上流側の流路を閉塞可能な流路閉塞装置を直接又は連結筒を介して密封状態で取付けることができるとともに、この流路閉塞装置の閉塞手段の挿入に邪魔になる機器の内部構成部材を容易に除去することができるので、例え、取替え対象機器がバタフライ弁と空気弁であっても、穿孔装置のホールソーを用いてバタフライ弁の両弁棒及び弁体を切断除去する必要がなく、工事規模を小さくすることができるとともに、バタフライ弁が開き状態で故障している場合でも容易に実施することができる。 According to the above characteristic configuration, when it is necessary to replace the equipment in the fluid piping system that has reached the end of its life or where water leakage or failure has occurred with the designated equipment, By loosening the fasteners that are tightly connected, and inserting the partition valve into the gap generated between the two connecting portions up to the flow passage blocking position, the flow passage can be shut off between the two connecting portions. Therefore, the flow path can be reliably blocked in a short time as compared with the freezing method.
Moreover, by disassembling the device after blocking the flow path by the partition plate valve and leaving a part of the device case disassembled on the connecting portion side, the joint portion of this remaining device case is utilized, and the upstream side A flow path closing device capable of closing the side flow path can be attached in a sealed state, directly or via a connecting cylinder, and the internal components of the device that obstruct the insertion of the closing means of this flow path closing device can be easily For example, even if the equipment to be replaced is a butterfly valve and an air valve, it is not necessary to cut and remove both butterfly valve stems and valve bodies using the hole saw of the drilling device. Can be made small, and even when the butterfly valve is in an open state, it can be easily implemented.

従って、バタフライ弁や空気弁等の取替え対象機器が有する分解機能に着目し、仕切板弁による流路遮断後における機器の分解によって閉塞手段の挿入阻害要因を排除すると同時に、連結部側の残置機器ケースの接合部を流路閉塞装置の取付け部として利用することにより、機器の交換作業を漏水の無い又は少ない状態で能率良く容易に行うことができるとともに、施工コストの低廉化と工期の短縮を図ることができる。   Therefore, paying attention to the disassembly function of the equipment to be replaced, such as butterfly valves and air valves, the disassembly of the equipment after shutting off the flow path with the partition valve eliminates the obstruction insertion insertion factor, and at the same time the remaining equipment on the connection side By using the joint part of the case as the attachment part of the flow path closing device, the replacement work of the equipment can be performed efficiently and easily with little or no leakage, and the construction cost can be reduced and the construction period can be shortened. Can be planned.

本発明による第２の特徴構成は、流体管部の連結部とこれに連通接続され、且つ、流路軸芯方向で分離可能に連結された複数の機器ケースを備えた機器の連結部とが密封状態で脱着自在に締結具にて締付け連結されている流体配管系において、管内流体の流れを断たない不断流状態で前記機器を指定機器に取り替える流体配管系の機器交換方法であって、以下の１）〜３）のステップを備えていることを特徴とする。
１）前記締結具を緩み操作して流体管部の連結部と機器の連結部との間に隙間を現出し、この隙間を通して仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断する。
２）前記機器を、連結部側の残置機器ケースを残して分解し、該残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側に挿入して流路を閉塞可能な閉塞手段と、当該閉塞手段を格納可能な格納室を有する蓋体とを備えた流路閉塞装置の前記蓋体を、前記残置機器ケースの接合部に直接又は連結筒を介して密封状態で取付け、前記両連結部間から仕切板弁を流路開放位置に操作したのち、前記蓋体内の閉塞手段を、残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側の流路閉塞位置に送り込んで、前記両連結部よりも上流側の流路を閉塞する。
３）前記流路閉塞装置の少なくとも閉塞手段を流路閉塞位置に残置したまま、前記残置機器ケース、及び流路閉塞装置の蓋体を含む、前記残置機器ケースの下流側に連結されたものを前記流体管部の連結部から取り外したのち、前記流体管部の連結部に開閉弁を密封状態で取付け、該開閉弁の下流側に、前記流路閉塞装置の蓋体を密封状態で取付け、前記開閉弁を開き操作して流路閉塞位置に残置されていた閉塞手段を蓋体の格納室内に格納し、前記開閉弁を閉じ操作する。その後、前記開閉弁から前記蓋体を含む流路遮断装置の残置構成部材を撤去するとともに、前記開閉弁に指定機器を密封状態で連結し、前記仕切板弁を流路閉塞後の適宜時期に撤去する。 According to a second characteristic configuration of the present invention, there is provided a connecting portion of a fluid pipe portion and a connecting portion of a device including a plurality of device cases that are connected to and connected to each other and are separable in the flow axis direction. In a fluid piping system that is tightly coupled with a fastener so as to be detachable in a sealed state, a device replacement method for a fluid piping system that replaces the device with a designated device in an uninterrupted state without interrupting the flow of fluid in the tube, The following steps 1) to 3) are provided.
1) By loosening the fastener, a gap appears between the connecting part of the fluid pipe part and the connecting part of the equipment. Through this gap, the partition plate valve is inserted to the flow path blocking position, thereby connecting both the parts. Block the flow path between the parts.
2) Closure means capable of closing the flow path by disassembling the device leaving a remaining device case on the connecting portion side , and inserting the device into the upstream side of the flow passage blocking position by the partition plate valve through the interior of the remaining device case. When, the lid of the passage closing device provided with a lid having a storage chamber capable of storing said closure means, mounted in a sealed state via a direct or connecting tube to the joints of the leaving device case, the After the partition plate valve is operated to the flow path open position from between the two connecting portions, the closing means in the lid body is passed through the inside of the remaining device case to the flow path closed position upstream of the flow path blocking position by the partition plate valve. Then, the flow path on the upstream side of both the connecting portions is closed.
3) What is connected to the downstream side of the remaining equipment case including the remaining equipment case and the lid of the flow path closing device while leaving at least the closing means of the flow path closing device at the flow path closing position. After removing from the connecting portion of the fluid pipe portion, an on-off valve is attached in a sealed state to the connecting portion of the fluid pipe portion , and a lid body of the flow path closing device is attached in a sealed state downstream of the on-off valve, The opening / closing valve is opened to close the closing means left at the flow path closing position in the storage chamber of the lid, and the opening / closing valve is closed. Thereafter, the remaining structural member of the flow path shut-off device including the lid is removed from the on-off valve, a designated device is connected to the on- off valve in a sealed state, and the partition plate valve is appropriately timed after the flow path is closed. Remove .

上記特徴構成によれば、耐久年数に至った又は漏水や故障の発生した流体配管系統中の機器を指定の機器に取り替える必要が生じたとき、この取替え対象機器の連結部と上流側流体管部の連結部とを締め付け連結している締結具を緩み操作して、両連結部間に発生した隙間に仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断することができるから、凍結工法に比して流路を短時間で確実に遮断することができる。
しかも、仕切板弁による流路遮断後に機器を分解して、連結部側に分解された一部の機器ケースを残置することにより、この残置機器ケースの接合部を利用して、仕切板弁による流路遮断位置よりも上流側の流路を閉塞可能な流路閉塞装置を直接又は連結筒を介して密封状態で取付けることができるとともに、この流路閉塞装置の閉塞手段の挿入に邪魔になる機器の内部構成部材を容易に除去することができるので、例え、取替え対象機器がバタフライ弁と空気弁であっても、穿孔装置のホールソーを用いてバタフライ弁の両弁棒及び弁体を切断除去する必要がなく、工事規模を小さくすることができるとともに、バタフライ弁が開き状態で故障している場合でも容易に実施することができる。 According to the above characteristic configuration, when it becomes necessary to replace the equipment in the fluid piping system that has reached the end of its useful life or where water leakage or failure has occurred with the designated equipment, the connecting portion and the upstream fluid pipe portion of the equipment to be replaced By loosening the fasteners that are connected to each other, the partition plate valve is inserted into the gap generated between the two connecting portions up to the flow blocking position so that the flow path between the two connecting portions is reduced. Since it can interrupt | block, compared with the freezing method, a flow path can be interrupted | blocked reliably in a short time.
In addition, by disassembling the device after blocking the flow path by the partition plate valve and leaving a part of the device case disassembled on the connecting portion side, using the junction of this remaining device case, A flow path closing device capable of closing the flow path upstream of the flow path blocking position can be mounted directly or via a connecting cylinder in a sealed state, and obstructs the insertion of the closing means of this flow path closing apparatus. Since the internal components of the equipment can be easily removed, even if the equipment to be replaced is a butterfly valve and an air valve, both the butterfly valve stem and valve body are cut and removed using the hole saw of the drilling device. Therefore, the construction scale can be reduced, and even when the butterfly valve is in an open state, it can be easily implemented.

従って、バタフライ弁や空気弁等の取替え対象機器が有する分解機能に着目し、仕切板弁による流路遮断後における機器の分解によって閉塞手段の挿入阻害要因を排除すると同時に、連結部側の残置機器ケースの接合部を流路閉塞装置の取付け部として利用することにより、機器の交換作業を漏水の無い又は少ない状態で能率良く容易に行うことができるとともに、施工コストの低廉化と工期の短縮を図ることができる。   Therefore, paying attention to the disassembly function of the equipment to be replaced, such as butterfly valves and air valves, the disassembly of the equipment after shutting off the flow path with the partition valve eliminates the obstruction insertion insertion factor, and at the same time the remaining equipment on the connection side By using the joint part of the case as the attachment part of the flow path closing device, the replacement work of the equipment can be performed efficiently and easily with little or no leakage, and the construction cost can be reduced and the construction period can be shortened. Can be planned.

本発明による第３の特徴構成は、流体管部の連結部とこれに連通接続され、且つ、流路軸芯方向で分離可能に連結された複数の機器ケースを備えた機器の連結部とが密封状態で脱着自在に締結具にて締付け連結されている流体配管系において、管内流体の流れを断たない不断流状態で前記機器を指定機器に取り替える流体配管系の機器交換方法であって、以下の１）〜３）のステップを備えていることを特徴とする。
１）前記締結具を緩み操作して流体管部の連結部と機器の連結部との間に隙間を現出し、この隙間を通して仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断する。
２）前記機器を、連結部側の残置機器ケースを残して分解し、該残置機器ケースの接合部に作業用開閉弁を直接又は連結筒を介して密封状態で取付け、この作業用開閉弁に、前記残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側に挿入して流路を閉塞可能な閉塞手段と、当該閉塞手段を格納可能な格納室を有する蓋体とを備えた流路閉塞装置の前記蓋体を密封状態で取付け、前記両連結部間から仕切板弁を流路開放位置に操作したのち、前記蓋体内の閉塞手段を、残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側の流路閉塞位置に送り込んで、前記両連結部よりも上流側の流路を閉塞する。
３）前記流路閉塞装置の少なくとも閉塞手段を流路閉塞位置に残置したまま、前記残置機器ケース、作業用開閉弁、及び流路閉塞装置の蓋体を含む、前記残置機器ケースの下流側に連結されたものを前記流体管部の連結部から取り外したのち、前記流体管部の連結部に開閉弁を密封状態で取付け、該開閉弁の下流側に、前記流路閉塞装置の蓋体を密封状態で取付け、前記開閉弁を開き操作して流路閉塞位置に残置されていた閉塞手段を蓋体の格納室内に格納し、前記開閉弁を閉じ操作する。その後、前記開閉弁から前記蓋体を含む流路遮断装置の残置構成部材を撤去するとともに、前記開閉弁に指定機器を密封状態で連結し、前記仕切板弁を流路閉塞後の適宜時期に撤去する。 According to a third characteristic configuration of the present invention, there is provided a connecting portion of a fluid pipe portion and a connecting portion of a device including a plurality of device cases that are connected to and connected to each other and are separable in the flow axis direction. In a fluid piping system that is tightly coupled with a fastener so as to be detachable in a sealed state, a device replacement method for a fluid piping system that replaces the device with a designated device in an uninterrupted state without interrupting the flow of fluid in the tube, The following steps 1) to 3) are provided.
1) By loosening the fastener, a gap appears between the connecting part of the fluid pipe part and the connecting part of the equipment. Through this gap, the partition plate valve is inserted to the flow path blocking position, thereby connecting both the parts. Block the flow path between the parts.
2) The above equipment is disassembled leaving the remaining equipment case on the connecting portion side , and a work on / off valve is attached to the joined portion of the remaining equipment case in a sealed state directly or via a connecting cylinder. A closing means capable of closing the flow path by being inserted upstream of the flow path blocking position by the partition plate valve through the inside of the remaining device case, and a lid having a storage chamber capable of storing the closing means. After the lid of the flow path closing device is attached in a sealed state and the partition plate valve is operated to the flow path open position from between both the connecting portions , the closing means in the lid body is passed through the inside of the remaining device case to the partition plate. The flow is sent to the flow path blocking position upstream of the flow path blocking position by the valve, and the flow path upstream of the both connecting portions is closed.
3) On the downstream side of the remaining equipment case, including the remaining equipment case, the work on-off valve, and the lid of the flow path closing device, with at least the closing means of the flow path closing device remaining in the flow path closing position. After what has been connected a remove from the connecting portion of the fluid conduit section, attached off valve sealingly to the connecting portion of the fluid conduit section, downstream of the closing valve, the cover of the channel closure device Is installed in a sealed state, the opening / closing valve is opened to close the closing means left in the flow path closing position in the storage chamber of the lid, and the opening / closing valve is closed. Thereafter, the remaining structural member of the flow path shut-off device including the lid is removed from the on-off valve, a designated device is connected to the on- off valve in a sealed state, and the partition plate valve is appropriately timed after the flow path is closed. Remove .

上記特徴構成によれば、耐久年数に至った又は漏水や故障の発生した流体配管系統中の機器を指定の機器に取り替える必要が生じたとき、この取替え対象機器の連結部と上流側流体管部の連結部とを締め付け連結している締結具を緩み操作して、両連結部間に発生した隙間に仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断することができるから、凍結工法に比して流路を短時間で確実に遮断することができる。
しかも、仕切板弁による流路遮断後に機器を分解して、連結部側に分解された一部の機器ケースを残置することにより、この残置機器ケースの接合部を利用して、作業用開閉弁を直接又は連結筒を介して密封状態で取付けることができるとともに、流路閉塞装置の閉塞手段の挿入に邪魔になる機器の内部構成部材を容易に除去することができるので、作業用開閉弁に、仕切板弁による流路遮断位置よりも上流側の流路を閉塞可能な流路閉塞装置を密封状態で取付けることが可能となり、例え、取替え対象機器がバタフライ弁と空気弁であっても、穿孔装置のホールソーを用いてバタフライ弁の両弁棒及び弁体を切断除去する必要がなく、工事規模を小さくすることができるとともに、バタフライ弁が開き状態で故障している場合でも容易に実施することができる。 According to the above characteristic configuration, when it becomes necessary to replace the equipment in the fluid piping system that has reached the end of its useful life or where water leakage or failure has occurred with the designated equipment, the connecting portion and the upstream fluid pipe portion of the equipment to be replaced By loosening the fasteners that are connected to each other, the partition plate valve is inserted into the gap generated between the two connecting portions up to the flow blocking position so that the flow path between the two connecting portions is reduced. Since it can interrupt | block, compared with the freezing method, a flow path can be interrupted | blocked reliably in a short time.
In addition, by disassembling the device after the flow path is shut off by the partition plate valve and leaving a part of the device case disassembled on the connecting portion side, the work on / off valve is utilized by using the joint portion of the remaining device case. Can be attached in a sealed state directly or via a connecting cylinder, and the internal components of the device that obstruct the insertion of the closing means of the flow path closing device can be easily removed. , It becomes possible to attach a flow path closing device capable of closing the flow path upstream from the flow path blocking position by the partition plate valve in a sealed state, for example, even if the replacement target device is a butterfly valve and an air valve, There is no need to cut and remove both butterfly valve stems and valve bodies using a hole saw in the drilling device, the construction scale can be reduced, and even if the butterfly valve is broken open, it can be easily implemented. It can be.

従って、バタフライ弁や空気弁等の取替え対象機器が有する分解機能に着目し、仕切板弁による流路遮断後における機器の分解によって閉塞手段の挿入阻害要因を排除すると同時に、連結部側の残置機器ケースの接合部を作業用開閉弁及び流路閉塞装置の取付け部として利用することにより、機器の交換作業を漏水の無い又は少ない状態で能率良く容易に行うことができるとともに、施工コストの低廉化と工期の短縮を図ることができる。   Therefore, paying attention to the disassembly function of the equipment to be replaced, such as butterfly valves and air valves, the disassembly of the equipment after shutting off the flow path with the partition valve eliminates the obstruction insertion insertion factor, and at the same time the remaining equipment on the connection side By using the joint part of the case as a mounting part for the work on / off valve and the flow path closing device, the equipment can be replaced efficiently and easily with little or no leakage, and the construction cost can be reduced. The construction period can be shortened.

本発明による第４の特徴構成は、流体管部の連結部とこれに連通接続され、且つ、流路軸芯方向で分離可能に連結された複数の機器ケースを備えた機器の連結部とが密封状態で脱着自在に締結具にて締付け連結されている流体配管系において、管内流体の流れを断たない不断流状態で前記機器を指定機器に取り替える流体配管系の機器交換方法であって、以下の１）〜３）のステップを備えていることを特徴とする。
１）前記締結具を緩み操作して流体管部の連結部と機器の連結部との間に隙間を現出し、この隙間を通して仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断する。
２）前記機器を分解し、仕切板弁による流路遮断位置よりも上流側に挿入して流路を閉塞可能な閉塞手段と、当該閉塞手段を格納可能な格納室を有する蓋体とを備えた流路閉塞装置のうち、前記閉塞手段の挿入を阻害する内部構成部材を除去したのち、再び組付けた機器の連結部に、前記流路閉塞装置を直接又は連結筒を介して密封状態で取付け、前記両連結部間から仕切板弁を流路開放位置に操作し、前記蓋体内の閉塞手段を、残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側の流路閉塞位置に送り込んで、前記両連結部よりも上流側の流路を閉塞する。
３）前記流路閉塞装置の少なくとも閉塞手段を流路閉塞位置に残置したまま、前記機器、及び流路閉塞装置の蓋体を含む、前記残置機器ケースの下流側に連結されたものを前記流体管部の連結部から取り外したのち、前記流体管部の連結部に開閉弁を密封状態で取付け、該開閉弁の下流側に、前記流路閉塞装置の蓋体を密封状態で取付け、前記開閉弁を開き操作して流路閉塞位置に残置されていた閉塞手段を蓋体の格納室内に格納し、前記開閉弁を閉じ操作する。その後、前記開閉弁から前記蓋体を含む流路遮断装置の残置構成部材を撤去するとともに、前記開閉弁に指定機器を密封状態で連結し、前記仕切板弁を流路閉塞後の適宜時期に撤去する。 According to a fourth characteristic configuration of the present invention, there is provided a connecting portion of a fluid pipe portion and a connecting portion of a device including a plurality of device cases that are connected to be connected to the fluid pipe portion and are separably connected in a flow axis direction. In a fluid piping system that is tightly coupled with a fastener so as to be detachable in a sealed state, a device replacement method for a fluid piping system that replaces the device with a designated device in an uninterrupted state without interrupting the flow of fluid in the tube, The following steps 1) to 3) are provided.
1) By loosening the fastener, a gap appears between the connecting part of the fluid pipe part and the connecting part of the equipment. Through this gap, the partition plate valve is inserted to the flow path blocking position, thereby connecting both the parts. Block the flow path between the parts.
2) Disassembling the device, comprising a closing means capable of closing the flow path by being inserted upstream of the flow path blocking position by the partition plate valve, and a lid having a storage chamber capable of storing the closing means. was among the passage closing device, after removing the inner component to inhibit the insertion of the closing means, the connecting portion of the device has been assembled again, in a sealed manner directly or via coupling tube the flow obstruction device Attach and operate the partition plate valve from between the two connecting portions to the channel opening position, and block the closing means in the lid body through the inside of the remaining device case and close the channel on the upstream side of the channel blocking position by the partition plate valve. The flow path is sent to the position, and the flow path on the upstream side of the both connecting portions is closed.
3) The fluid connected to the downstream side of the remaining device case, including the device and the lid of the channel closing device, with at least the blocking means of the channel closing device remaining at the channel closing position. After being removed from the connecting part of the pipe part, an on-off valve is attached in a sealed state to the connecting part of the fluid pipe part , and a lid body of the flow path closing device is attached in a sealed state downstream of the on-off valve, The closing means left open at the flow path closing position by opening the valve is stored in the storage chamber of the lid, and the opening / closing valve is closed. Thereafter, the remaining structural member of the flow path shut-off device including the lid is removed from the on-off valve, a designated device is connected to the on- off valve in a sealed state, and the partition plate valve is appropriately timed after the flow path is closed. Remove .

上記特徴構成によれば、耐久年数に至った又は漏水や故障の発生した流体配管系統中の機器を指定の機器に取り替える必要が生じたとき、この取替え対象機器の連結部と上流側流体管部の連結部とを締め付け連結している締結具を緩み操作して、両連結部間に発生した隙間に仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断することができるから、凍結工法に比して流路を短時間で確実に遮断することができる。
しかも、仕切板弁による流路遮断後に機器を分解し、仕切板弁による流路遮断位置よりも上流側の流路を閉塞可能な流路閉塞装置の閉塞手段の挿入を阻害する内部構成部材を除去した状態で再び機器を組付けたのち、この機器の連結部を利用して、流路閉塞装置を直接又は連結筒を介して密封状態で取付けることができるので、例え、取替え対象機器がバタフライ弁と空気弁であっても、穿孔装置のホールソーを用いてバタフライ弁の両弁棒及び弁体を切断除去する必要がなく、工事規模を小さくすることができるとともに、バタフライ弁が開き状態で故障している場合でも容易に実施することができる。 According to the above characteristic configuration, when it becomes necessary to replace the equipment in the fluid piping system that has reached the end of its useful life or where water leakage or failure has occurred with the designated equipment, the connecting portion and the upstream fluid pipe portion of the equipment to be replaced By loosening the fasteners that are connected to each other, the partition plate valve is inserted into the gap generated between the two connecting portions up to the flow blocking position so that the flow path between the two connecting portions is reduced. Since it can interrupt | block, compared with the freezing method, a flow path can be interrupted | blocked reliably in a short time.
Moreover, an internal component member that disassembles the device after blocking the flow path by the partition plate valve and inhibits insertion of the closing means of the flow path closing device that can close the flow path upstream from the flow path blocking position by the partition plate valve is provided. After assembling the device again in the removed state, the flow path closing device can be mounted in a sealed state directly or via a connecting cylinder using the connecting portion of this device. Even for valves and air valves, it is not necessary to cut and remove both butterfly valve stems and valve bodies using the hole saw of the drilling device, and the construction scale can be reduced and the butterfly valve is open and malfunctions. Even if it is, it can be implemented easily.

従って、バタフライ弁や空気弁等の取替え対象機器が有する分解機能に着目し、仕切板弁による流路遮断後における機器の分解によって閉塞手段の挿入阻害要因を排除すると同時に、この取替え対象機器の連結部を流路閉塞装置の取付け部として再利用することにより、機器の交換作業を漏水の無い又は少ない状態で能率良く容易に行うことができるとともに、施工コストの低廉化と工期の短縮を図ることができる。   Therefore, paying attention to the disassembly function of the replacement target device such as a butterfly valve and air valve, it is possible to eliminate the obstruction insertion factor by disassembling the device after the flow path is shut off by the partition plate valve, and at the same time connect the replacement target device. By reusing the part as the attachment part of the flow path blocking device, the replacement work of the equipment can be performed efficiently and easily with little or no leakage, and the construction cost is reduced and the construction period is shortened. Can do.

本発明による第５の特徴構成は、前記締結具の緩み操作を許容する状態で少なくとも両連結部の接合面間の外周を密封状態で囲繞可能で、かつ、流路を遮断可能な薄板状の仕切板弁が抜き差し操作自在に設けられている遮断作業ケースを装着し、この遮断作業ケースの仕切板弁を、締結具の緩み操作によって発生した両連結部間の隙間を通して流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断するように構成されている点にある。   A fifth characteristic configuration according to the present invention is a thin plate-like shape that can surround at least the outer periphery between the joint surfaces of both the connecting portions in a sealed state and allows the flow path to be blocked in a state in which the loosening operation of the fastener is allowed. Install a shut-off work case in which the partition valve is provided so that it can be freely inserted and removed, and connect the shut-off valve of this shut-off work case to the flow path shut-off position through the gap between the connecting parts generated by the loosening operation of the fastener. By being inserted, the flow path is blocked between both connecting portions.

上記特徴構成によれば、両連結部の外周を遮断作業ケースで囲繞したのち、両連結部を締付け連結している締結具を緩み操作し、この緩み操作に連れて両連結部間の隙間から流出した流体は遮断作業ケース内に充満するものの、外部に漏洩することはない。
それ故に、両連結部間の隙間を仕切板弁の板厚よりも十分に大きくすることが可能で、しかも、遮断作業ケース内に流体が充満した状態では流路内圧と略等しくなっているため、この遮断作業ケースに設けられている薄板状の仕切板弁を両連結部間の隙間を通して流路遮断位置にまで確実、スムーズに差し込み操作することができる。 According to the above characteristic configuration, after the outer periphery of both connecting portions is surrounded by the shut-off work case, the fastener that tightens and connects the two connecting portions is loosened, and the loosening operation causes the clearance between the two connecting portions. Although the spilled fluid fills the blocking work case, it does not leak outside.
Therefore, it is possible to make the gap between the two connecting portions sufficiently larger than the thickness of the partition valve, and when the fluid is filled in the shutoff work case, it is substantially equal to the flow path pressure. The thin plate-like partition plate valve provided in the shut-off work case can be reliably and smoothly inserted into the flow path shut-off position through the gap between the connecting portions.

従って、両連結部の接合面間の隙間から外部に噴出する流体の圧力に抗して蔽板弁を差し込み操作する必要がなく、両連結部の接合面間での流路遮断作業を、管内流体の漏洩を回避しながら少ない労力で能率良く確実、容易に行うことができる。   Therefore, there is no need to insert and operate the shielding plate valve against the pressure of the fluid ejected to the outside from the gap between the joint surfaces of both connecting portions, and the flow path blocking operation between the joint surfaces of both connecting portions can be performed in the pipe. While avoiding fluid leakage, it can be carried out efficiently, reliably and easily with little effort.

本発明による第６の特徴構成は、前記遮断作業ケースには、両連結部の接合面間において強制押し広げ力を付与する隙間形成手段が設けられ、当該隙間形成手段によって、締結具の緩み操作代の範囲内で両連結部間を強制的に押し広げたのち、遮断作業ケースの仕切板弁を、両連結部間の隙間を通して流路遮断位置にまで差し入れる点にある。 According to a sixth characteristic configuration of the present invention, the blocking work case is provided with a gap forming means for applying a forced pushing and expanding force between the joint surfaces of the two connecting portions, and the loosening operation of the fastener is performed by the gap forming means. After forcibly expanding between the two connecting portions within the range of the allowance, the partition plate valve of the blocking work case is inserted through the gap between the two connecting portions to the flow path blocking position.

上記特徴構成によれば、両連結部を締付け連結している締結具を緩み操作しても、両連結部間に緩み操作代に相当する隙間が形成されなかつたり、或いは、連結箇所に存在する融通範囲内で下流側連結部に対して上流側連結部が傾動しても、遮断作業ケースに設けられている隙間形成手段によって、締結具の緩み操作代の範囲内で両連結部間を強制的に押し広げることにより、両連結部間に緩み操作代に相当する隙間を確実に形成することができるので、遮断作業ケースによって両連結部の外周を密封状態に囲繞しながらも、遮断作業ケースに設けられている仕切板弁を両連結部間の隙間を通して流路遮断位置にまで確実、スムーズに差し込み操作することができる。   According to the above characteristic configuration, even if the fastener that is tightening and connecting the two connecting portions is loosened, a gap corresponding to the loosening operation allowance is not formed between the two connecting portions, or exists at the connecting portion. Even if the upstream connecting part tilts with respect to the downstream connecting part within the interchangeable range, the gap forming means provided in the shut-off work case forces the two connecting parts within the range of the loosening operation allowance of the fastener. Since the gap corresponding to the loosening operation allowance can be surely formed between the two connecting portions by pushing the cover apart, the shut-off work case can be used to seal the outer periphery of both connecting portions in a sealed state. The partition plate valve provided in can be smoothly and smoothly inserted into the flow path blocking position through the gap between the two connecting portions.

本発明による第７の特徴構成は、前記連結部側に残置される機器ケースの分離接合面が前記接合部に構成されている点にある。 Seventh characterizing feature of the the present invention is that the separation joint surface of the device case, which is left to the connecting portion side is constructed in the joint.

上記特徴構成によれば、機器の分解によって連結部側に残置される機器ケースの分離接合面を、上流側の流路を閉塞可能な流路閉塞装置を取付けるための接合部に利用することができるから、例えば、流体管の分岐管部に直接機器が脱着自在に連結されている場合でも簡単に実施することができる。   According to the above characteristic configuration, the separation joint surface of the device case left on the connection portion side by disassembling the device can be used as a joint portion for attaching a flow path closing device capable of closing the upstream flow path. Therefore, for example, even when the device is directly connected to the branch pipe portion of the fluid pipe so as to be detachable, it can be easily implemented.

〔第１実施形態〕
図１は流体配管系の途中の管接続構造を示し、流体管の一例である鋳鉄管製の水道管１の途中に一体的に突出形成された分岐管部（流体管部の一例）２の連結フランジ部（連結部の一例）２Ａに、機器の一例であるバタフライ弁Ｖの上流側端部（下端）に形成された連結フランジ部（連結部の一例）３０Ａが、通常使用のボルト４Ｃ・ナット４Ｄからなる第１締結具４にて脱着自在に密封状態で締付け連結されているとともに、バタフライ弁Ｖの下流側端部（上端）に形成された連結フランジ部（連結部の一例）３１Ａには、機器の一例である空気弁３の上流側端部（下端）に形成された連結フランジ部（連結部の一例）３Ａが、ボルト５Ａ・ナット５Ｂからなる第２締結具５にて脱着自在に密封状態で締付け連結されている。 [First Embodiment]
FIG. 1 shows a pipe connection structure in the middle of a fluid piping system, and a branch pipe portion (an example of a fluid pipe portion) 2 formed integrally and projecting in the middle of a water pipe 1 made of cast iron pipe, which is an example of a fluid pipe. A connecting flange portion (an example of a connecting portion) 2A is provided with a connecting flange portion (an example of a connecting portion) 30A formed at an upstream end (lower end) of a butterfly valve V, which is an example of a device. A first flange 4 made of a nut 4D is detachably connected in a sealed state and is connected to a connecting flange portion (an example of a connecting portion) 31A formed at the downstream end (upper end) of the butterfly valve V. Is a connecting flange portion (an example of a connecting portion) 3A formed at an upstream end portion (lower end) of an air valve 3 which is an example of an apparatus, and is detachable by a second fastener 5 including a bolt 5A and a nut 5B. Are tightly connected in a sealed state.

前記バタフライ弁Ｖは、図１、図２に示すように、流路軸芯方向で分離可能に連結された二個の弁箱（機器ケースの一例）３０，３１を備え、そのうち、下流側の弁箱３１の周壁の径方向両側部に、弁棒３２，３３を構成する弁軸ボルトが分岐軸芯Ｙを通る径方向の開閉回動軸芯Ｚ上に組付けられ、弁箱３０，３１内の流路Ｗに臨む両弁軸ボルト３２，３３の内側端部には、弁体３４の径方向二箇所に形成されたボス部が外嵌されているとともに、一方の弁軸ボルト３２とこれに外嵌された弁体３４のボス部とに連通形成された連結孔に亘ってテーパーピン３５を打ち込み固定することにより、弁体３４と一方の弁軸ボルト３２とが一体的に開閉回動軸芯Ｚ周りで回動操作自在に構成されている。   As shown in FIGS. 1 and 2, the butterfly valve V includes two valve boxes (an example of an equipment case) 30 and 31 that are detachably connected in the direction of the flow axis. Valve shaft bolts constituting the valve rods 32 and 33 are assembled on the radial opening / closing pivot axis Z passing through the branch axis Y on both sides in the radial direction of the peripheral wall of the valve box 31. Boss portions formed at two locations in the radial direction of the valve body 34 are externally fitted to the inner ends of the valve shaft bolts 32 and 33 facing the inner flow path W, and one of the valve shaft bolts 32 and The taper pin 35 is driven and fixed over a connecting hole formed in communication with the boss portion of the valve body 34 that is externally fitted thereto, whereby the valve body 34 and one of the valve shaft bolts 32 are integrally opened and closed. It is configured to be freely rotatable around the dynamic axis Z.

また、弁箱３０，３１の接合面間には、弁座面を構成するシール材の一例であるＯリング３６を抜止め固定する弁座押え３７が取付けられているとともに、下流側弁箱３１の内周壁面３１ａが、弁体３４の開閉回動軸芯Ｚ周りでの開閉回動を摺接案内する部分球面状に形成されていて、その部分球状内周壁面３１ａの下流側開口部における開口径が、弁体３４の外径よりも小径に構成されている。   Further, between the joint surfaces of the valve casings 30 and 31, a valve seat retainer 37 for attaching and retaining an O-ring 36, which is an example of a sealing material constituting the valve seat surface, is attached, and the downstream valve casing 31. The inner peripheral wall surface 31a is formed in a partial spherical shape that slide-guides the opening / closing rotation around the opening / closing rotation axis Z of the valve body 34, and in the downstream opening of the partial spherical inner peripheral wall surface 31a. The opening diameter is configured to be smaller than the outer diameter of the valve body 34.

前記下流側弁箱３１の周壁に対して開閉回動軸芯Ｚ周りで回動自在な一方の弁軸ボルト３２のうち、下流側弁箱３０の外面から外方に突出位置する角軸部分３２ａには、弁操作具３８のボス部３８Ａが相対回転不能な一体回転状態で外嵌され、角軸部分３２ａの先端側に連続形成されるネジ軸部分３２ｂには、弁操作具３８のボス部３８Ａを抜止め固定するナット３９が螺合されている。   Of the one valve shaft bolt 32 that is rotatable around the opening / closing rotation axis Z with respect to the peripheral wall of the downstream valve box 31, an angular shaft portion 32 a that protrudes outward from the outer surface of the downstream valve box 30. The boss portion 38A of the valve operation tool 38 is externally fitted in an integrally rotated state in which relative rotation is impossible, and the boss portion of the valve operation tool 38 is formed on the screw shaft portion 32b continuously formed on the distal end side of the square shaft portion 32a. A nut 39 for retaining and fixing 38A is screwed.

前記上流側弁箱３０の下流側端部（上端）に形成された連結フランジ部３０Ｂと下流側弁箱３１の上流側端部（下端）に形成された連結フランジ部３１Ａは、下流側連結フランジ部３０Ｂの貫通孔７Ｃを通して上流側連結フランジ部３１Ａに形成されているネジ孔７Ｂに螺合する第３締結具７のボルト７Ａにより脱着自在に固定連結されている。   The connecting flange portion 30B formed at the downstream end (upper end) of the upstream valve box 30 and the connecting flange portion 31A formed at the upstream end (lower end) of the downstream valve box 31 are composed of a downstream connecting flange. It is fixedly connected in a detachable manner by a bolt 7A of a third fastener 7 that is screwed into a screw hole 7B formed in the upstream connecting flange portion 31A through a through hole 7C of the portion 30B.

そして、前記上流側弁箱３０から下流側弁箱３１を分離すると、下流側弁箱３１にはバタフライ弁Ｖの主要内部構成部材である両弁軸ボルト３２，３３及び弁体３４が組付けられているため、上流側弁箱３０側には、後述する流路閉塞装置Ｅの閉塞手段Ｆの挿入に邪魔になるバタフライ弁Ｖの内部構成部材、つまり、バタフライ弁Ｖ内の流路に突出する内部構成部材が存在しない。
それ故に、下流側弁箱３１が分離された上流側弁箱３０の下流側連結フランジ部３０Ｂを利用して、図１１〜図１６に示すように、作業用開閉弁５２が連結筒５３を介して密封状態で固定連結可能に構成され、下流側連結フランジ部３０Ｂの分離接合面が、作業用開閉弁５２を介して流路閉塞装置Ｅを取付けるため接合部に構成されている。 Then, when the downstream valve box 31 is separated from the upstream valve box 30, both valve shaft bolts 32 and 33 and the valve body 34 which are main internal components of the butterfly valve V are assembled in the downstream valve box 31. Therefore, the upstream side valve box 30 side protrudes into an internal component of the butterfly valve V that interferes with insertion of the closing means F of the flow path closing device E described later, that is, a flow path in the butterfly valve V. There are no internal components.
Therefore, using the downstream connecting flange portion 30B of the upstream valve box 30 from which the downstream valve box 31 is separated, the work on / off valve 52 is connected via the connecting cylinder 53 as shown in FIGS. The separation joint surface of the downstream connection flange portion 30B is configured as a joint portion for attaching the flow path closing device E via the work on-off valve 52.

前記連結筒５３の上流側端部（下端）に形成された連結フランジ部５３Ａには、上流側弁箱３０の下流側連結フランジ部３０Ｂに対してボルト２７で脱着自在に密封状態で固定連結するためのネジ孔５３ａが形成されているとともに、連結筒５３の下流側端部（上端）に形成された連結フランジ部５６Ｂと作業用開閉弁５２の上流側連結フランジ部５２Ａとはボルト２７・ナット２８を介して密封状態で着脱自在に固定連結されている。   The connecting flange 53A formed at the upstream end (lower end) of the connecting cylinder 53 is fixedly connected in a sealed state to the downstream connecting flange 30B of the upstream valve box 30 with a bolt 27 so as to be detachable. And a connection flange portion 56B formed at the downstream end (upper end) of the connection cylinder 53 and the upstream connection flange portion 52A of the work on / off valve 52 are a bolt 27 and a nut. It is fixedly connected to be detachable in a sealed state via 28.

そして、水道管１内の上水の流れを維持した不断水状態のまま、劣化による漏水や故障等の理由でバタフライ弁Ｖ及び空気弁３を、図２０に示すような選定された指定の新たな開閉弁６及び新たな空気弁３に取り替える必要が発生したとき、図３、図４に示すように、前記分岐管部２の連結フランジ部２Ａとバタフライ弁Ｖの上流側連結フランジ部３０Ａとにわたる部位には、分岐管部２の連結フランジ部２Ａとバタフライ弁Ｖの上流側連結フランジ部３０Ａとの間において、水道管１の管軸芯Ｘ１に対して直交する分岐軸芯Ｘ２方向の管内流路Ｗを遮断する管内流路遮断装置Ａが組付けられるとともに、図１３〜図１９に示すように、管内流路遮断装置Ａの仕切板弁８による流路遮断位置よりも上流側の流路を閉塞（遮断）するための流路閉塞装置Ｅが用いられる。   Then, the butterfly valve V and the air valve 3 are selected and designated as shown in FIG. 20 for the reason of water leakage or failure due to deterioration, while maintaining the flow of clean water in the water pipe 1. When it is necessary to replace the open / close valve 6 and the new air valve 3, the connecting flange portion 2A of the branch pipe portion 2 and the upstream connecting flange portion 30A of the butterfly valve V, as shown in FIGS. In the region extending between the connecting flange portion 2A of the branch pipe portion 2 and the upstream side connecting flange portion 30A of the butterfly valve V, the pipe in the direction of the branch axis X2 orthogonal to the tube axis X1 of the water pipe 1 An in-pipe flow path blocking device A that blocks the flow path W is assembled, and as shown in FIGS. 13 to 19, a flow upstream of the flow path blocking position by the partition plate valve 8 of the in-pipe flow path blocking device A is provided. Flow path to block (block) the path Fort apparatus E is used.

前記管内流路遮断装置Ａには、図３〜図９に示すように、分岐管部２とバタフライ弁Ｖに対して、それらの両連結フランジ部２Ａ，３０Ａの外周を密封する状態で脱着自在に装着可能な遮断作業ケースＢと、第１締結具４のボルト４Ａ・袋ナット４Ｂの緩み操作によって発生した両連結フランジ部２Ａ，３０Ａの接合面間の隙間Ｓを通して管内流路Ｗを遮断する位置にまで差込み移動自在な薄板状の仕切板弁８と、この仕切板弁８を密封状態で流路遮断位置と流路開放操作位置とに摺動案内する摺動ガイド手段Ｃが主要構成として備えられているとともに、前記遮断作業ケースＢの周方向複数箇所（当該実施形態では周方向の三箇所）には、第１締結具４のボルト４Ａ・袋ナット４Ｂの緩み操作代の範囲内で両連結フランジ部２Ａ，３０Ａの接合面間を強制的に押し広げるための強制押し広げ力を付与する隙間形成手段Ｄが設けられている。 As shown in FIGS. 3 to 9, the in-pipe passage blocking device A is detachable with respect to the branch pipe portion 2 and the butterfly valve V in a state where the outer circumferences of both the connecting flange portions 2A and 30A are sealed. The in-pipe flow path W is blocked through the clearance S between the joint surfaces of the connecting flange portions 2A and 30A generated by the loosening operation of the bolt 4A and the cap nut 4B of the first fastener 4 The main components are a thin plate-like partition plate valve 8 that can be inserted and moved to a position, and a sliding guide means C that slides and guides the partition plate valve 8 to a flow passage blocking position and a flow passage opening operation position in a sealed state. In addition, the cutting work case B is provided at a plurality of locations in the circumferential direction (three locations in the circumferential direction in the embodiment) within the range of the loosening operation allowance of the bolt 4A and the cap nut 4B of the first fastener 4. Both connecting flange parts 2A, 30A Gap forming means D is provided to impart force pushing spread force for widening forcibly pushed between mating surface.

前記第１締結具４としては、通常仕様の複数組（当該実施形態では４組）のボルト４Ｃ，４Ｄと密封機能に優れた防水仕様の複数組（当該実施形態では４組）のボルト４Ａ・袋ナット４Ｂからなり、バタフライ弁Ｖ及び空気弁３を取り替え工事の開始時には、通常仕様のボルト４Ｃ，４Ｄから防水仕様のボルト４Ａ・袋ナット４Ｂに取り替え、更に、取り替え工事の終了時に防水仕様のボルト４Ａ・袋ナット４Ｂから通常仕様のボルト４Ｃ，４Ｄに取り替える。   The first fastener 4 includes a plurality of bolts 4C, 4D having a normal specification (four sets in the embodiment) and a plurality of bolts 4A, 4D having a waterproof specification (four sets in the embodiment) having an excellent sealing function. Consists of cap nut 4B, butterfly valve V and air valve 3 are replaced with normal bolts 4C and 4D at the start of replacement work. Waterproof bolts 4A and cap nuts 4B are replaced. Replace the bolts 4A and cap nut 4B with normal bolts 4C and 4D.

前記遮断作業ケースＢは、図３〜図７に示すように、各連結フランジ部２Ａ，３０Ａの外周面に対して径方向外方から圧接可能な横断面視略半円形状の環状の第１シール部１１ａ及び両連結フランジ部２Ａ，３０Ａの外周面の隣接間に径方向外方に向かって開口形成されている環状凹部２５に対して一部が入り込む状態で径方向外方から圧接可能な横断面視略半円形状の環状の第２シール部１１ｂを備えた環状弾性シール材１１と、この環状弾性シール材１１を径方向外方から締付け固定する二分割構造の締付け輪１２とから構成されている。   As shown in FIGS. 3 to 7, the blocking work case B has a substantially semicircular annular first cross-sectional view that can be pressed against the outer peripheral surfaces of the connecting flange portions 2 </ b> A and 30 </ b> A from the outside in the radial direction. The seal portion 11a and the connecting flange portions 2A and 30A can be press-contacted from the outside in the radial direction in a state where a part enters the annular recess 25 formed to open radially outward between the adjacent outer peripheral surfaces. An annular elastic sealing material 11 provided with an annular second seal portion 11b having a substantially semicircular shape in cross-sectional view, and a two-part structure fastening ring 12 for fastening and fixing the annular elastic sealing material 11 from the outside in the radial direction. Has been.

前記環状弾性シール材１１は、図５、図８、図９に示すように、接合面間に仕切板弁８を差し込み可能な設定最大隙間Ｓが形成されているときにおける両連結フランジ部２Ａ，３０Ａの分岐軸芯Ｙ方向での外面間隔と等しい又は略等しい幅で円環状に一体成形されているとともに、それの内周面のうち、両連結フランジ部２Ａ，３０Ａの隣接間中央位置に対応する幅方向中央位置に一体形成される第２シール部１１ｂの径方向内方への突出代が、各連結フランジ部２Ａ，３０Ａの外周面に対応する幅方向両側位置に一体形成される第１シール部１１ａの径方向内方への突出代よりも大に構成され、更に、両第１シール部１１ａの最小内径及び第２シール部１１ｂの最小内径が、連結フランジ部２Ａ，３０Ａの外周面の外径よりも小に構成されている。   As shown in FIGS. 5, 8, and 9, the annular elastic sealing material 11 includes both connecting flange portions 2 </ b> A when a set maximum gap S into which the partition plate valve 8 can be inserted is formed between the joint surfaces. It is integrally formed in an annular shape with a width equal to or substantially equal to the outer surface interval in the branch axis Y direction of 30A, and corresponds to the center position between adjacent two of the connecting flange portions 2A and 30A on the inner peripheral surface thereof. The first seal portion 11b, which is integrally formed at the center position in the width direction, projects inwardly in the radial direction, and is formed integrally at both side positions in the width direction corresponding to the outer peripheral surfaces of the connecting flange portions 2A and 30A. The seal portion 11a is configured larger than the radially inward projecting margin, and the minimum inner diameter of both the first seal portions 11a and the minimum inner diameter of the second seal portion 11b are the outer peripheral surfaces of the connecting flange portions 2A and 30A. Configured to be smaller than the outer diameter of There.

また、前記環状弾性シール材１１の第２シール部１１ｂの一部には、仕切板弁８の差込み移動を許容する開口１１ｃが形成され、この開口１１ｃの周方向両側脇に位置する部位と開口１１ｃに径方向で相対向する部位との合計三箇所には、隙間形成手段Ｄを構成する分離ボルト１３の先端側が径方向外方から貫通する貫通孔１１ｄが形成されている。   In addition, an opening 11c that allows the partition plate valve 8 to be inserted and moved is formed in a part of the second seal portion 11b of the annular elastic sealing material 11, and a portion and an opening located on both sides in the circumferential direction of the opening 11c. Through holes 11d through which the distal ends of the separation bolts 13 constituting the gap forming means D penetrate from the outside in the radial direction are formed at a total of three locations that are opposite to the portion 11c in the radial direction.

前記締付け輪１２は、図３〜図６に示すように、環状弾性シール材１１の分岐軸芯Ｙ方向幅よりも大きな分岐軸芯Ｙ方向幅に構成された略半円弧状の一対の締付け分割輪１２Ａと、各締付け分割輪１２Ａの周方向両端部に固着された連結片１２Ｂのうち、仕切板弁８の抜き差し方向で相対向する連結片１２Ｂ同士を引寄せ固定するボルト１２Ｃ・ナット１２Ｄから構成されていて、ボルト１２Ｃ・ナット１２Ｄが設定トルクで締め付け操作されたとき、第１締結具４の緩み操作に伴う分岐管部２とバタフライ弁Ｖとの水圧による相対離脱移動を許容する状態で、環状弾性シール材１１の両第１シール部１１ａが両連結フランジ部２Ａ，３０Ａの外周面に設定圧接力で密封圧接されると同時に、環状弾性シール材１１の第２シール部１１ｂが両連結フランジ部２Ａ，３０Ａの隣接間の環状凹部２５に設定圧接力で密封圧接されるように構成されている。   As shown in FIGS. 3 to 6, the tightening ring 12 is a pair of substantially semicircular arc-shaped tightening divisions configured to have a width in the branch axis Y direction larger than the width in the branch axis Y direction of the annular elastic seal material 11. Of the connecting pieces 12B fixed to both ends in the circumferential direction of the ring 12A and each tightening split wheel 12A, from the bolts 12C and nuts 12D for pulling and fixing the connecting pieces 12B facing each other in the direction of inserting and removing the partition plate valve 8 When the bolt 12C and the nut 12D are tightened with a set torque, the relative disengagement movement by the water pressure between the branch pipe portion 2 and the butterfly valve V accompanying the loosening operation of the first fastener 4 is permitted. The first seal portions 11a of the annular elastic seal material 11 are hermetically pressed against the outer peripheral surfaces of the two connecting flange portions 2A and 30A with a set pressure contact force, and at the same time, the second seal portions 11b of the annular elastic seal material 11 are both Forming flange portions 2A, and it is configured to be sealed pressed by setting the pressing force to the annular recess 25 between 30A adjacent.

また、一方の締付け分割輪１２Ａのうち、環状弾性シール材１１の開口１１ｃに径方向で相対向する周方向中央位置には、仕切板弁８の弁板８Ａの横断面形状よりも若干大きな相似形で、かつ、仕切板弁８の抜き差し移動を摺動案内する機能を備えたスリット状の開口１２ａが貫通形成されているとともに、両締付け分割輪１２Ａにおける環状弾性シール材１１の各貫通孔１１ｄに径方向で相対向する周方向の三箇所には、隙間形成手段Ｄを構成する分離ボルト１３が径方向外方から貫通する貫通孔１２ｂが形成されている。   Further, in one of the clamped divided wheels 12A, a similarity that is slightly larger than the cross-sectional shape of the valve plate 8A of the partition plate valve 8 is provided at a circumferentially central position opposite to the opening 11c of the annular elastic sealing material 11 in the radial direction. And a slit-like opening 12a having a function of slidingly guiding the insertion / removal movement of the partition plate valve 8 is formed so as to penetrate therethrough, and each through-hole 11d of the annular elastic sealing material 11 in both tightening split rings 12A. At three locations in the circumferential direction opposite to each other in the radial direction, through holes 12b through which the separation bolts 13 constituting the gap forming means D penetrate from the radially outer side are formed.

前記仕切板弁８は、図３〜図５に示すように、分岐管部２及びバタフライ弁Ｖの外径よりも少し大なる幅を有し、かつ、先端縁８ａが半円形状に形成された薄板状（当該実施形態では板厚が３．２ｍｍ）の弁板８Ａと、この弁板８Ａの後端縁の中央位置に固着された操作伝達軸８Ｂと、この操作伝達軸８Ｂの後端部に螺合固定された操作ハンドル８Ｃとから構成されている。   As shown in FIGS. 3 to 5, the partition plate valve 8 has a width that is slightly larger than the outer diameters of the branch pipe portion 2 and the butterfly valve V, and the tip edge 8 a is formed in a semicircular shape. A thin plate-like valve plate (A thickness is 3.2 mm in this embodiment), an operation transmission shaft 8B fixed to the center position of the rear edge of the valve plate 8A, and a rear end of the operation transmission shaft 8B And an operation handle 8C which is screwed to the part.

また、前記弁板８Ａの半円先端縁８ａは、それの板厚方向中央位置に先鋭端が位置する状態で断面Ｖ字状に面取り加工されている。   The semicircular tip edge 8a of the valve plate 8A is chamfered to have a V-shaped cross section with a sharp end located at the center position in the plate thickness direction.

前記摺動ガイド手段Ｃを構成するに、図３〜図７に示すように、一方の締付け分割輪１２Ａに、仕切板弁８の半円弧状先端縁８ａの一部がスリット状開口１２ａに対して摺動自在に入り込む状態で弁板８Ａの大部分を収納可能な収納空間１４を備えた弁ケース１５が固着されているとともに、弁ケース１５の後端部に形成された連結フランジ部１５Ａには、仕切板弁８の操作伝達軸８Ｂを仕切板弁８の抜き差し方向に移動自在に摺動案内する蓋体１６がボルト１７にて締付け固定され、更に、蓋体１６には、仕切板弁８の操作伝達軸８Ｂの外周面との間を密封するＯリング１８が設けられている。   As shown in FIGS. 3 to 7, the sliding guide means C is configured such that a part of the semicircular tip edge 8 a of the partition valve 8 is formed with respect to the slit-shaped opening 12 a on one of the clamping divided wheels 12 </ b> A. A valve case 15 having a storage space 14 in which most of the valve plate 8A can be stored while being slidably inserted is fixed to a connecting flange portion 15A formed at the rear end of the valve case 15. A lid body 16 that slides and guides the operation transmission shaft 8B of the partition plate valve 8 so as to be movable in the insertion / removal direction of the partition plate valve 8 is fastened and fixed by bolts 17. Further, the lid body 16 includes a partition plate valve. An O-ring 18 that seals between the outer peripheral surfaces of the eight operation transmission shafts 8B is provided.

前記隙間形成手段Ｄを構成するに、図３〜図７に示すように、両締付け分割輪１２Ａの外周面の各貫通孔１２ｂに臨む部位には、分離ボルト１３の雄ネジ部１３ａに螺合する雌ネジ部２０ａを備えたネジ筒体２０が固着されているとともに、各分離ボルト１３の先端部には、両連結フランジ部２Ａ，３０Ａの隣接間の環状凹部２５に対して径方向外方から進入することにより、第１締結具４のボルト４Ａ・袋ナット４Ｂの緩み操作代の範囲内で両連結フランジ部２Ａ，３０Ａの接合面間を押し広げるテーパー面１３ｂが形成されている。   As shown in FIGS. 3 to 7, the gap forming means D is screwed into the male threaded portion 13a of the separation bolt 13 at the portion facing the respective through holes 12b on the outer peripheral surface of the tightening split ring 12A. A threaded cylinder body 20 having a female thread portion 20a is fixed, and the distal end portion of each separation bolt 13 is radially outward with respect to the annular recess 25 between the adjacent connecting flange portions 2A and 30A. The taper surface 13b which pushes between the joint surfaces of both the connecting flange portions 2A and 30A within the range of the loosening operation allowance of the bolt 4A and the cap nut 4B of the first fastener 4 is formed.

更に、前記各分離ボルト１３は、図５に示すように、それのボルト軸芯が仕切板弁８の弁体８Ａの移動平面を通る平面上又はその近傍に位置する状態で締付け輪１２の各締付け分割輪１２Ａに取付けられているとともに、各分離ボルト１３の後端部には、ネジ筒体２０の外部からレンチ等の操作具で螺合操作するための操作係合穴１３ｃが形成され、更に、ネジ筒体２０の内周面には、各分離ボルト１３の外周面との間を密封するＯリング２１が設けられている。   Further, as shown in FIG. 5, each of the separation bolts 13 has a bolt shaft core positioned on or near the plane passing through the plane of movement of the valve body 8 </ b> A of the partition plate valve 8. An operation engagement hole 13c is formed at the rear end portion of each separation bolt 13 and screwed with an operation tool such as a wrench from the outside of the screw cylinder body 20, and is attached to the tightening split ring 12A. Furthermore, an O-ring 21 that seals between the outer peripheral surface of each separation bolt 13 is provided on the inner peripheral surface of the screw cylinder 20.

また、図６に示すように、前記第１締結具４の防水仕様用のボルト４Ａにおける頭部の当接面及び防水仕様用の袋ナット４Ｂの当接面の各々には、分岐管部２の連結フランジ部２Ａの外面又はバタフライ弁Ｖの上流側連結フランジ部３０Ａの外面との間を密封するＯリング２２，２３が設けられている。
そのため、分岐管部２の連結フランジ部２Ａとバタフライ弁Ｖの連結フランジ部３０Ａとを締付け連結している第１締結具４の緩み操作に連れて両連結フランジ部２Ａ，３０Ａ間に隙間Ｓが発生しても、一方の連結フランジ部３０Ａとボルト４Ａの頭部との当接、及び他方の連結フランジ部２Ａと袋ナット４Ｂとの当接が維持されているので、それらの各当接面間に位置するＯリング２２，２３によって、連結フランジ部２Ａ，３０Ａに貫通形成されているボルト挿通孔を通しての流体の漏洩を抑制することができる。 Further, as shown in FIG. 6, the branch pipe portion 2 is provided on each of the contact surface of the head of the bolt 4A for waterproof specification of the first fastener 4 and the contact surface of the cap nut 4B for waterproof specification. O-rings 22 and 23 are provided for sealing between the outer surface of the connecting flange portion 2A and the outer surface of the upstream connecting flange portion 30A of the butterfly valve V.
Therefore, a clearance S is formed between the connecting flange portions 2A and 30A in accordance with the loosening operation of the first fastener 4 that tightens and connects the connecting flange portion 2A of the branch pipe portion 2 and the connecting flange portion 30A of the butterfly valve V. Even if it occurs, the contact between the one connecting flange portion 30A and the head of the bolt 4A and the contact between the other connecting flange portion 2A and the cap nut 4B are maintained. O-rings 22 and 23 positioned between them can suppress fluid leakage through bolt insertion holes formed through the connecting flange portions 2A and 30A.

次に、機器交換方法に用いられる流路閉塞装置Ｅとしては従来から種々の構造のものが存在するが、その一例を説明する。
図１３〜図１９に示すように、作業用開閉弁５２の下流側連結フランジ部５２Ｂに対してボルト２７・ナット２８で着脱自在に固定連結される連結フランジ部５４Ａを備えた有底筒状の蓋体５４の底壁部５４Ｂには、この底壁部５４Ｂの中央部を密封状態で軸芯方向に摺動自在に貫通する筒状の第１操作軸５５と、この第１操作軸５５内を軸芯方向に摺動自在に貫通する第２操作軸５６とが設けられ、この第１操作軸５５及び第２操作軸５６の内端側には、分岐管部２内の流路Ｗを遮断するための閉塞手段Ｆと、この閉塞手段Ｆによる遮蔽箇所よりも上流側の大径管壁部、つまり、水道管１の分岐流路開口周縁に対して係合可能な拡径姿勢に屈曲しながら張り出す係止リンク５７，５８対を備えた抜止め手段Ｇが設けられているとともに、閉塞手段Ｆ及び抜止め手段Ｇを外部から両操作軸５５，５６を介して操作する操作手段Ｈが設けられている。 Next, as the flow path closing device E used in the device replacement method, there are conventionally various types of structures, and an example thereof will be described.
As shown in FIG. 13 to FIG. 19, a bottomed cylindrical shape provided with a connecting flange portion 54 </ b> A that is detachably fixedly connected to the downstream side connecting flange portion 52 </ b> B of the work on / off valve 52 by bolts 27 and nuts 28. The bottom wall portion 54B of the lid body 54 includes a cylindrical first operation shaft 55 that passes through the center portion of the bottom wall portion 54B in a sealed state so as to be slidable in the axial direction. And a second operating shaft 56 that slidably penetrates in the axial direction. A flow path W in the branch pipe portion 2 is formed on the inner ends of the first operating shaft 55 and the second operating shaft 56. Bending means F for blocking, and a large-diameter pipe wall portion on the upstream side of the shielding portion by the closing means F, that is, a diameter-expanding posture that can be engaged with the peripheral edge of the branch channel opening of the water pipe 1 A retaining means G having a pair of locking links 57 and 58 protruding while being provided is provided and closed. Operating means H for operating through both operating shaft 55, 56 a unit F and the retaining means G from the outside.

次に、前記閉塞手段Ｆについて説明する。
図１７に示すように、第１操作軸５５の内端部に、円環状の押圧面６０Ａ及び先端側に向かって同芯円で開口する中空部６０Ｂを備えた第１押圧板６０が外嵌固定され、第２操作軸５６の内端側には、第１押圧板６０の押圧面６０Ａと軸芯方向で相対向する円環状の押圧面６１Ａ及び第１押圧板６０の中空部６０Ｂに対して軸芯方向に移動自在に内嵌する筒状部６１Ｂを備えた第２押圧板６１が、軸芯方向に摺動自在に外嵌されているとともに、前記両押圧板６０，６１の押圧面６０Ａ，６１Ａ間には、これらによる軸芯方向からの挟圧により、分岐管部２の内周壁面に密着する拡径状態に弾性変形してその内周壁面と両押圧板６０，６１の外周部との間を遮蔽する、つまり流路Ｗを遮蔽するゴム製の拡径用弾性体５９が外装されている。 Next, the closing means F will be described.
As shown in FIG. 17, the first pressing plate 60 having an annular pressing surface 60 </ b> A and a hollow portion 60 </ b> B opening concentrically toward the tip side is fitted on the inner end portion of the first operating shaft 55. Fixed to the inner end side of the second operating shaft 56, the annular pressing surface 61A opposite to the pressing surface 60A of the first pressing plate 60 in the axial direction and the hollow portion 60B of the first pressing plate 60. The second pressing plate 61 having a cylindrical portion 61B that is movably fitted in the axial direction is slidably fitted in the axial direction, and the pressing surfaces of both the pressing plates 60 and 61 60A and 61A are elastically deformed into a diameter-expanded state in close contact with the inner peripheral wall surface of the branch pipe portion 2 by the clamping pressure from the axial direction by these, and the outer peripheral surfaces of the inner peripheral wall surface and both pressing plates 60 and 61 An elastic body 59 for expanding the diameter of the rubber that shields the gap between the parts, that is, shields the flow path W is covered.

また、前記第２操作軸５６の内端側に形成されたネジ軸部５６ａには、第２操作軸５６に対する第２押圧板６１の上流側への最大移動位置を設定するストッパー用のナット６２とロック用のナット６３が螺合されているとともに、前記第１押圧板６０の外径及び第２押圧板６１の外径は、蓋体５４内の格納室５４Ｃから作業用開閉弁５２、連結筒５３、上流側弁箱３０を通して水道管１の分岐管部２内に出し入れ操作することのできる外径に形成されている。   Further, a screw nut 56 a formed on the inner end side of the second operation shaft 56 has a stopper nut 62 that sets the maximum movement position of the second pressing plate 61 upstream of the second operation shaft 56. And the locking nut 63 are screwed together, and the outer diameter of the first pressing plate 60 and the outer diameter of the second pressing plate 61 are connected to the work on / off valve 52 from the storage chamber 54C in the lid 54. It is formed to have an outer diameter that can be operated in and out of the branch pipe portion 2 of the water pipe 1 through the tube 53 and the upstream valve box 30.

次に、前記抜止め手段Ｇについて説明する。
図１７に示すように、第２押圧板６１の上流側端面の周方向三箇所に、下流側の係止リンク５８の端部が揺動自在に枢支連結される板状の連結部６５が固着されているとともに、第２操作軸５６の内端側ネジ軸部５６ａに摺動自在に外嵌された取付け筒体６６の外周面の周方向三箇所には、上流側の係止リンク５７の端部が揺動自在に枢支連結される板状の連結部６７が固着され、更に、第２操作軸５６に対する取付け筒体６６の上流側への最大移動位置を設定するストッパー用のナット６８が、第２操作軸５６の内端側ネジ軸部５６ａの先端側に螺合されている。 Next, the retaining means G will be described.
As shown in FIG. 17, plate-like connecting portions 65 to which the end portions of the downstream locking links 58 are pivotally connected at three locations in the circumferential direction on the upstream end surface of the second pressing plate 61 are swingable. At the three positions in the circumferential direction of the outer peripheral surface of the mounting cylinder 66 that is fixedly attached and slidably fitted to the inner end side screw shaft portion 56a of the second operation shaft 56, an upstream side locking link 57 is provided. A plate-like connecting portion 67 whose end is pivotally connected so as to be swingable is fixed, and a stopper nut for setting the maximum moving position of the mounting cylinder 66 upstream of the second operating shaft 56 is fixed. 68 is screwed to the tip end side of the inner end side screw shaft portion 56 a of the second operation shaft 56.

そして、第２押圧板６１の連結部６５と取付け筒体６６の連結部６７とのうち、軸芯方向で相対向する三組の連結部６５，６７に亘って夫々係止リンク５７，５８対が枢支連結されていて、図１７に示すように、第１操作軸５５に対する第２操作軸５６の外端側への摺動に連動して、拡径用弾性体５９による遮蔽箇所よりも上流側の内周壁面、つまり、水道管１の分岐流路開口周縁に対して係合可能な拡径姿勢に屈曲しながら張り出すように構成されている。   And among the connection part 65 of the 2nd press board 61, and the connection part 67 of the attachment cylinder 66, it is respectively set to 3 sets of connection parts 65 and 67 which mutually oppose in an axial direction, and 57 links | As shown in FIG. 17, in conjunction with sliding toward the outer end side of the second operation shaft 56 with respect to the first operation shaft 55, as shown in FIG. It is configured to project while being bent into a diameter-enlarging posture that can be engaged with the inner peripheral wall surface on the upstream side, that is, the peripheral edge of the branch channel opening of the water pipe 1.

次に、前記操作手段Ｈについて説明する。
図１３〜図１８に示すように、前記第１操作軸５５は、第１押圧板６０に対して軸芯方向から嵌合固定される長尺の操作本体筒軸５５Ａと、この操作本体筒軸５５Ａの外端側に嵌合固定される操作延長筒軸５５Ｂとからなり、この操作延長筒軸５５Ｂの内周面が正六角形の異径内周面に形成されている。 Next, the operation means H will be described.
As shown in FIGS. 13 to 18, the first operation shaft 55 includes a long operation main body cylinder shaft 55 </ b> A fitted and fixed to the first pressing plate 60 from the axial direction, and the operation main body cylinder shaft. The operation extension cylinder shaft 55B is fitted and fixed to the outer end side of 55A. The inner peripheral surface of the operation extension cylinder shaft 55B is formed as a regular hexagonal different diameter inner peripheral surface.

前記第２操作軸５６は、内端側にネジ軸部５６ａを備えた長尺の操作本体軸５６Ａと、この操作本体軸５６Ａの外端側に螺合固定される操作延長軸５６Ｂとからなり、この操作延長軸５６Ｂには、第１操作軸５５の操作延長筒軸５５Ｂの端部にスラストベアリング７５を介して当接可能な操作ネジ部材７６が螺合する外端側ネジ軸部５６ｂと、第１操作軸５５の操作延長筒軸５５Ｂに相対回転不能な状態で軸芯方向にのみ摺動自在に嵌合する外周面が正六角形に形成された大径の角軸部５６ｃが形成されている。   The second operation shaft 56 includes a long operation main body shaft 56A having a screw shaft portion 56a on the inner end side, and an operation extension shaft 56B screwed and fixed to the outer end side of the operation main body shaft 56A. The operation extension shaft 56B includes an outer end side screw shaft portion 56b into which an operation screw member 76 that can be brought into contact with the end portion of the operation extension cylinder shaft 55B of the first operation shaft 55 via a thrust bearing 75 is screwed. A large-diameter angular shaft portion 56c having a regular hexagonal outer peripheral surface that is slidably fitted only in the axial direction in a state in which the first operation shaft 55 cannot be rotated relative to the operation extension cylinder shaft 55B is formed. ing.

そして、前記操作ネジ部材７６を締付け側に螺合操作すると、図１６に示すように、第２操作軸５６に対して第１操作軸５５が内端側に押込み摺動され、第２押圧板６１に対する第１押圧板６０の近接移動に伴う挟圧作用により、非圧縮状態にある拡径用弾性体５９が分岐管部２の内周壁面に密着する拡径状態に弾性変形して、その分岐管部２内の流路Ｗを密封状態で遮蔽する。   When the operation screw member 76 is screwed to the tightening side, as shown in FIG. 16, the first operation shaft 55 is pushed and slid to the inner end side with respect to the second operation shaft 56, and the second pressing plate Due to the clamping action accompanying the proximity movement of the first pressing plate 60 with respect to 61, the elastic body 59 for diameter expansion in an uncompressed state is elastically deformed into a diameter expansion state in close contact with the inner peripheral wall surface of the branch pipe portion 2, The flow path W in the branch pipe part 2 is shielded in a sealed state.

また、前記第１操作軸５５の操作延長筒軸５５Ｂには、図１３に示すように、一対の第１押え操作杆７７が脱着自在に嵌合保持されているとともに、この両第１押え操作杆７７には、第２操作軸５６の操作延長軸５６Ｂに脱着自在に嵌合保持された第２押え操作杆７８に対して係脱操作自在で、係合状態では水圧に抗して第１操作軸５５に対する第２操作軸５６の外端側への摺動を阻止する第１係止リング７９と、蓋体５４の底壁部５４Ｂに固着されたＬ型の一対の係止片８０に対して係脱操作自在で、係合状態では水圧に抗して蓋体５４に対する第１操作軸５５の外端側への摺動を阻止する第２係止リング８１が設けられている。   Further, as shown in FIG. 13, a pair of first presser operation rods 77 are detachably fitted and held on the operation extension cylinder shaft 55B of the first operation shaft 55, and both the first presser operations. The collar 77 can be engaged and disengaged with respect to the second presser operating collar 78 that is detachably fitted to the operation extension shaft 56B of the second operating shaft 56. In the engaged state, the first press against the water pressure is provided. A first locking ring 79 that prevents the second operating shaft 56 from sliding toward the outer end side with respect to the operating shaft 55, and a pair of L-shaped locking pieces 80 fixed to the bottom wall portion 54B of the lid 54. On the other hand, a second locking ring 81 is provided that can be freely engaged and disengaged and prevents sliding of the first operating shaft 55 to the outer end side with respect to the lid 54 against the water pressure in the engaged state.

前記蓋体５４の上部に接続された排水管８２には、閉塞手段Ｆによって分岐管部２内の流路Ｗが完全に遮断されたか否かを放水の有無によって確認するための開閉操作レバー８３Ａを備えた水栓８３が設けられている。   The drain pipe 82 connected to the upper part of the lid 54 has an opening / closing operation lever 83A for confirming whether or not the flow path W in the branch pipe portion 2 is completely blocked by the closing means F by the presence or absence of water discharge. A faucet 83 provided with the above is provided.

次に、上述の如く構成された管内流路遮断装置Ａ及び流路閉塞装置Ｅを用いての機器交換方法について説明する。
［１］先ず、図１、図２に示すように、分岐管部２の連結フランジ部２Ａと上流側弁箱３０の連結フランジ部３０Ａとを締付け連結している第１締結具４の通常仕様の複数組のボルト４Ｃ，４Ｄ（図１、図２０参照）を、一組又は二組単位で防水仕様のボルト４Ａ・袋ナット４Ｂに取り替える。 Next, a device replacement method using the in-pipe channel blocking device A and the channel blocking device E configured as described above will be described.
[1] First, as shown in FIGS. 1 and 2, the normal specification of the first fastener 4 in which the connecting flange portion 2 </ b> A of the branch pipe portion 2 and the connecting flange portion 30 </ b> A of the upstream valve box 30 are fastened and connected. The plurality of bolts 4C and 4D (see FIGS. 1 and 20) are replaced with waterproof bolts 4A and cap nuts 4B in units of one or two sets.

［２］図３、図４に示すように、遮断作業ケースＢの環状弾性シール材１１を弾性復元力に抗して拡径変形させた状態で空気弁３及びバタフライ弁Ｖを経由して分岐管部２の連結フランジ部２Ａの外周面と上流側弁箱３０の上流側連結フランジ部３０Ａの外周面とにわたる部位に外装すると、この環状弾性シール材１１の縮径側への弾性復帰により、環状弾性シール材１１の両第１シール部１１ａが両連結フランジ部２Ａ，３０Ａの外周面に設定圧接力よりも小さな弾性力で圧接されると同時に、環状弾性シール材１１の第２シール部１１ｂが両連結フランジ部２Ａ，３０Ａの隣接間に形成されている環状凹部２５に一部が入り込む状態で設定圧接力よりも小さな弾性力で圧接され、環状弾性シール材１１が両連結フランジ部２Ａ，３０Ａに弾性力で保持される。   [2] As shown in FIGS. 3 and 4, the annular elastic sealing material 11 of the shut-off work case B is diverged through the air valve 3 and the butterfly valve V in a state of expanding and deforming against the elastic restoring force. When the outer peripheral surface of the connecting flange portion 2A of the pipe portion 2 and the outer peripheral surface of the upstream connecting flange portion 30A of the upstream valve box 30 are packaged, the elastic return to the reduced diameter side of the annular elastic sealing material 11 Both the first seal portions 11a of the annular elastic seal material 11 are pressed against the outer peripheral surfaces of both the connecting flange portions 2A and 30A with an elastic force smaller than the set pressure contact force, and at the same time, the second seal portions 11b of the annular elastic seal material 11 Is pressed with an elastic force smaller than the set pressure contact force in a state where a part of the annular recess 25 is formed between the two connecting flange portions 2A and 30A, and the annular elastic sealing material 11 is connected to the two connecting flange portions 2A and 2A. 30A It is held in sexual force.

［３］次に、前記環状弾性シール材１１の外周面に遮断作業ケースＢの一対の締付け分割輪１２Ａを当て付け、各締付け分割輪１２Ａの周方向両端部に固着された連結片１２Ｂのうち、仕切板弁８の抜き差し方向で相対向する連結片１２Ｂ同士を、ボルト１２Ｃ・ナット１２Ｄにて引寄せ固定し、第１締結具４の緩み操作に伴う分岐管部２と上流側弁箱３０との水圧による相対離脱移動を許容する状態で、環状弾性シール材１１の両第１シール部１１ａが両連結フランジ部２Ａ，３０Ａの外周面に設定圧接力で密封圧接されると同時に、環状弾性シール材１１の第２シール部１１ｂが両連結フランジ部２Ａ，３０Ａの隣接間の環状凹部２５に設定圧接力で密封圧接される。 [3] Next, of the connecting pieces 12B fixed to the circumferential end portions of each of the clamping divided wheels 12A by applying a pair of clamping divided wheels 12A of the blocking work case B to the outer circumferential surface of the annular elastic sealing material 11 The connecting pieces 12B facing each other in the insertion / removal direction of the partition valve 8 are pulled and fixed by bolts 12C and nuts 12D, and the branch pipe portion 2 and the upstream valve box 30 accompanying the loosening operation of the first fastener 4 are fixed. At the same time, both first seal portions 11a of the annular elastic sealing material 11 are hermetically pressed against the outer peripheral surfaces of both the connecting flange portions 2A and 30A with a set pressure contact force. The second seal portion 11b of the seal material 11 is hermetically pressed with a set pressure contact force to the annular recess 25 between the two adjacent flange portions 2A and 30A.

このように遮断作業ケースＢが分岐管部２及び上流側弁箱３０に取付けられた状態では、仕切板弁８の薄板状弁板８Ａの大部分が、摺動ガイド手段Ｃを構成する弁ケース１５の収納空間１４内に収納され、仕切板弁８の半円弧状先端縁８ａの一部のみが締付け輪１２のスリット状開口１２ａに摺動自在に入り込んでいる。   In this state where the shut-off work case B is attached to the branch pipe portion 2 and the upstream valve box 30, a valve case in which most of the thin plate-like valve plate 8 </ b> A of the partition plate valve 8 constitutes the sliding guide means C. 15 is accommodated in the storage space 14, and only a part of the semicircular tip end edge 8 a of the partition valve 8 enters the slit-like opening 12 a of the fastening ring 12 slidably.

また、第１締結具４のボルト４Ａ・袋ナット４Ｂの緩み操作代の範囲内で両連結フランジ部２Ａ，３０Ａの接合面間を押し広げるための隙間形成手段Ｄを構成する各分離ボルト１３は、それのテーパー面１３ｂが両連結フランジ部２Ａ，３０Ａの隣接間の環状凹部２５に臨むだけで、それ以外の大部分は両締付け分割輪１２Ａの外周面に固着されたネジ筒体２０内に保持されている。   In addition, each separation bolt 13 constituting the gap forming means D for expanding the space between the joint surfaces of both the connecting flange portions 2A and 30A within the range of the loosening operation allowance of the bolt 4A and the cap nut 4B of the first fastener 4 is The taper surface 13b only faces the annular recess 25 between the two adjacent connecting flange portions 2A and 30A, and the rest of the taper surface 13b is in the screw cylinder 20 fixed to the outer peripheral surface of the tightening split ring 12A. Is retained.

［４］次に、図５、図６に示すように、第１締結具４のボルト４Ａ・袋ナット４Ｂを設定隙間Ｓに相当する寸法分だけ緩み操作して、両連結フランジ部２Ａ，３０Ａの接合面間に、仕切板弁８の薄板状弁板８Ａが少し余裕をもって進入可能な隙間Ｓを現出する。このとき、各分離ボルト１３の後端部（径方向外方側端部）に形成されている操作係合穴１３ｃをレンチ等の操作具で回転操作して、両連結フランジ部２Ａ，３０Ａの隣接間の環状凹部２５に臨む各分離ボルト１３のテーパー面１３ｂを径方向内方側に螺合移動させ、第１締結具４の緩み操作代の範囲内で両連結フランジ部２Ａ，３０Ａ間を強制的に押し広げる。 [4] Next, as shown in FIGS. 5 and 6, the bolts 4 </ b> A and the cap nut 4 </ b> B of the first fastener 4 are loosened by a dimension corresponding to the set gap S, and both connecting flange portions 2 </ b> A and 30 </ b> A are operated. A gap S in which the thin plate-like valve plate 8A of the partition plate valve 8 can enter with a slight margin appears between the joint surfaces. At this time, the operation engagement hole 13c formed in the rear end portion (radially outward end portion) of each separation bolt 13 is rotated with an operation tool such as a wrench, so that both the connecting flange portions 2A and 30A The taper surface 13b of each separating bolt 13 facing the annular recess 25 between adjacent ones is screwed and moved radially inward, and between the connecting flange portions 2A and 30A within the range of the loosening operation allowance of the first fastener 4. Force to spread.

それ故に、連結フランジ部２Ａ，３０Ａを締付け連結している第１締結具５を緩み操作しても、両連結フランジ部２Ａ，３Ａ間に緩み操作代に相当する隙間Ｓが形成されなかったり、或いは、フランジ接合箇所に存在する融通範囲内で分岐管部２の連結フランジ部２Ａに対して上流側弁箱３０の上流側連結フランジ部３０Ａが傾動しても、遮断作業ケースＢの周方向複数箇所に設けられている分離ボルト１３によって、第１締結具４の緩み操作代の範囲内で両連結フランジ部２Ａ，３０Ａ間を強制的に押し広げることにより、両連結フランジ部２Ａ，３０Ａ間に緩み操作代に相当する設定隙間Ｓを確実に形成することができるとともに、その設定隙間Ｓの周方向での開口幅の均等化を図ることができるので、分岐管部２及び上流側弁箱３０に装着した遮断作業ケースＢによって両連結フランジ部２Ａ，３０Ａの外周を密封状態に囲繞しながらも、遮断作業ケースＢに設けられている仕切板弁８の薄板状弁板８Ａを両連結フランジ部２Ａ，３０Ａの接合面間の設定隙間Ｓを通して流路遮断位置にまで確実、スムーズに差し込み操作することができる。   Therefore, even if the first fastener 5 that tightens and connects the connecting flange portions 2A and 30A is loosened, a gap S corresponding to the loosening operation allowance is not formed between the two connecting flange portions 2A and 3A. Alternatively, even if the upstream connecting flange portion 30A of the upstream valve box 30 tilts with respect to the connecting flange portion 2A of the branch pipe portion 2 within the accommodation range existing at the flange joint location, a plurality of circumferential directions of the shut-off work case B are provided. By separating the connecting bolts 2 between the connecting flange portions 2A and 30A by forcibly expanding the connecting flange portions 2A and 30A within the range of the loosening operation allowance of the first fastener 4 by the separating bolt 13 provided at the location. Since the set gap S corresponding to the loosening operation allowance can be reliably formed and the opening width in the circumferential direction of the set gap S can be equalized, the branch pipe portion 2 and the upstream valve box 30 can be obtained. In While the outer periphery of both connecting flange portions 2A, 30A is sealed in a sealed state by the shut-off work case B, the thin plate-like valve plate 8A of the partition plate valve 8 provided in the shut-off work case B is connected to the two connecting flange portions 2A. , 30A through the set gap S between the joining surfaces to the flow path blocking position can be surely and smoothly inserted.

［５］そして、図７に示すように、両連結フランジ部２Ａ，３０Ａの接合面間の設定隙間Ｓを通して仕切板弁８の薄板状弁板８Ａを流路遮断位置にまで差し込み操作すると、分岐管部２の連結フランジ部２Ａと上流側弁箱３０の上流側連結フランジ部３０Ａとの間において、水道管１の管軸芯Ｘに対して直交する分岐軸芯Ｙ方向の管内流路Ｗが遮断される。 [5] Then, as shown in FIG. 7, if the thin plate-like valve plate 8A of the partition plate valve 8 is inserted to the flow passage blocking position through the set gap S between the joint surfaces of the two connecting flange portions 2A and 30A, the branching occurs. Between the connecting flange part 2A of the pipe part 2 and the upstream connecting flange part 30A of the upstream valve box 30, there is an in-pipe flow path W in the branch axis Y direction perpendicular to the pipe axis X of the water pipe 1. Blocked.

このとき、分岐管部２の連結フランジ部２Ａと上流側弁箱３０の上流側連結フランジ部３Ａとの接合面間に介装されるシール材の一例であるシートパッキン９が、仕切板弁８の薄板状弁板８Ａの流路遮断位置への差し込み操作によって損傷しないように注意する。   At this time, the seat packing 9, which is an example of a sealing material interposed between the joint surfaces of the connecting flange portion 2 </ b> A of the branch pipe portion 2 and the upstream connecting flange portion 3 </ b> A of the upstream valve box 30, is divided into the partition plate valve 8. Care should be taken not to damage the thin plate-shaped valve plate 8A by inserting it into the flow path blocking position.

［６］図１０に示すように、上述の仕切板弁８による管内流路Ｗの遮断状態において、バタフライ弁Ｖの下流側連結フランジ部３０Ｂと空気弁３の上流側連結フランジ部３Ａとを締付け連結している第２締結具５のボルト５Ａ・ナット５Ｂを取り外して、バタフライ弁Ｖから取替え対象の一つである空気弁３を撤去するとともに、上流側弁箱３０の下流側連結フランジ部３０Ｂと下流側弁箱３１の上流側連結フランジ部３１Ａとを締付け連結している第３締結具７のボルト７Ａを取り外して、取替え対象の一つであるバタフライ弁Ｖの下流側弁箱３１を上流側弁箱３０から撤去する。 [6] As shown in FIG. 10, the downstream connection flange 30 </ b> B of the butterfly valve V and the upstream connection flange 3 </ b> A of the air valve 3 are tightened in the state where the pipe flow path W is blocked by the partition valve 8 described above. The bolts 5A and nuts 5B of the connected second fastener 5 are removed to remove the air valve 3 that is one of the replacement targets from the butterfly valve V, and the downstream connection flange portion 30B of the upstream valve box 30 is removed. And the upstream connection flange portion 31A of the downstream valve box 31 are removed and the bolt 7A of the third fastener 7 is removed, and the downstream valve box 31 of the butterfly valve V, which is one of the replacement targets, is upstream. Remove from side valve box 30.

前記上流側弁箱３０から下流側弁箱３１を分離すると、下流側弁箱３１にはバタフライ弁Ｖの主要内部構成部材である両弁軸ボルト３２，３３及び弁体３４が組付けられているため、上流側弁箱３０側には、流路閉塞装置Ｅの閉塞手段Ｆの挿入に邪魔になるバタフライ弁Ｖの内部構成部材は存在しない。   When the downstream valve box 31 is separated from the upstream valve box 30, both the valve shaft bolts 32 and 33 and the valve element 34, which are main internal components of the butterfly valve V, are assembled in the downstream valve box 31. Therefore, there is no internal component of the butterfly valve V that obstructs the insertion of the closing means F of the flow path closing device E on the upstream valve box 30 side.

［７］図１１に示すように、上流側弁箱３０の下流側連結フランジ部３０Ｂに、連結筒５３の上流側連結フランジ部５６Ａをボルト２７にて密封状態で固定連結するとともに、連結筒５３の下流側連結フランジ部５６Ｂには、作業用開閉弁５２の上流側連結フランジ部５２Ａをボルト２７・ナット２８にて密封状態で固定連結する。 [7] As shown in FIG. 11, the upstream connection flange portion 56 </ b> A of the connection tube 53 is fixedly connected to the downstream connection flange portion 30 </ b> B of the upstream valve box 30 with a bolt 27 in a sealed state, and the connection tube 53. The downstream connection flange portion 56B is fixedly connected to the upstream connection flange portion 52A of the work on-off valve 52 in a sealed state with bolts 27 and nuts 28.

［８］図１２に示すように、作業用開閉弁５２の弁体５２Ｃを流路遮断位置に閉じ操作したのち、流路遮断位置にある仕切板弁８の薄板状弁板８Ａを流路開放位置にまで引き抜き操作するとともに、遮断作業ケースＢの周方向複数箇所に設けられている分離ボルト１３を隙間解除位置にまで緩み操作したのち、第１締結具４のボルト４Ａ・袋ナット４Ｂを締め付け操作して、分岐管部２の連結フランジ部２Ａと上流側弁箱３０の上流側連結フランジ部３０Ａとを密封状態で締付け連結する。
尚、前記作業用開閉弁５２を閉じ操作した以降、実際には、分岐管部２の連結フランジ部２Ａと上流側弁箱３０の上流側連結フランジ部３０Ａとを密封状態で締付け連結した以降の任意の時期において、分岐管部２及び上流側弁箱３０から管内流路遮断装置Ａを撤去することができるが、当該実施形態では、流路閉塞装置Ｅの閉塞手段Ｆによる流路遮断後において撤去する。 [8] As shown in FIG. 12, after the valve body 52C of the working on-off valve 52 is closed to the flow path blocking position, the thin plate-like valve plate 8A of the partition plate valve 8 at the flow path blocking position is opened. After pulling out to the position, loosening the separation bolts 13 provided at a plurality of locations in the circumferential direction of the blocking work case B to the clearance release position, and then tightening the bolt 4A and the cap nut 4B of the first fastener 4 By operating, the connecting flange portion 2A of the branch pipe portion 2 and the upstream connecting flange portion 30A of the upstream valve box 30 are tightened and connected in a sealed state.
In addition, after the operation on-off valve 52 is closed, the connection flange portion 2A of the branch pipe portion 2 and the upstream connection flange portion 30A of the upstream valve box 30 are actually tightened and connected in a sealed state. The pipe flow passage blocking device A can be removed from the branch pipe section 2 and the upstream valve box 30 at any time, but in this embodiment, after the flow passage is shut off by the closing means F of the flow passage closing device E. Remove.

［８］図１３に示すように、作業用開閉弁５２の下流側連結フランジ部５２Ｂに、流路閉塞装置Ｅの蓋体５４の連結フランジ部５４Ａをボルト２７・ナット２８にて密封状態で締付け連結する。 [8] As shown in FIG. 13, the connecting flange portion 54A of the lid 54 of the flow path closing device E is tightened to the downstream connecting flange portion 52B of the work on-off valve 52 with a bolt 27 and a nut 28 in a sealed state. Link.

このとき、一対の第１係止リング７９を第２押え操作杆７８に係合させたまま、一対の第２係止リング８１を蓋体５４の両係止片８０から取り外し、両操作軸５５，５６を蓋体５４に対して上方に引き上げ移動させ、閉塞手段Ｆ及び抜止め手段Ｇを蓋体５４の格納室５４Ｃ内に格納する。   At this time, with the pair of first locking rings 79 engaged with the second presser operating rod 78, the pair of second locking rings 81 is removed from both the locking pieces 80 of the lid 54, and both the operation shafts 55 are removed. , 56 are moved upward with respect to the lid 54, and the closing means F and the retaining means G are stored in the storage chamber 54C of the lid 54.

また、両操作軸５５，５６の軸芯方向での位置関係は、両第１係止リング７９によって規制されていて、その状態では両押圧板６０，６１の対向間隔が拡径用弾性体５９を圧縮しない又はそれに近い間隔に設定されているため、拡径用弾性体５９は縮径状態に維持されている。   Further, the positional relationship between the operation shafts 55 and 56 in the axial direction is regulated by the first locking rings 79, and in this state, the opposing distance between the pressing plates 60 and 61 is the diameter-enlarging elastic body 59. Is not compressed or set at an interval close thereto, the diameter-enlarging elastic body 59 is maintained in a reduced diameter state.

［９］図１４に示すように、作業用開閉弁５２を開き操作して、両操作軸５５，５６を蓋体５４に対して下方に押し込み移動させ、一対の第２係止リング８１を蓋体５４の両係止片８０に係合して、両操作軸５５，５６を押し込み操作位置に保持する。
このとき、抜止め手段Ｇは、分岐管部２内の流路Ｗよりも横断面積の大きな水道管１内に位置している。 [9] As shown in FIG. 14, the working on-off valve 52 is opened, both operating shafts 55, 56 are pushed downward with respect to the lid 54, and the pair of second locking rings 81 are covered. Engaging with both locking pieces 80 of the body 54, the two operating shafts 55 and 56 are pushed in and held in the operating position.
At this time, the retaining means G is located in the water pipe 1 having a larger cross-sectional area than the flow path W in the branch pipe portion 2.

［１０］次に、図１５に示すように、一対の第１係止リング７９を第２押え操作杆７８から取り外すとともに、第２操作軸５６の操作延長軸５６Ｂから第２押え操作杆７８を取り外すと、水道管１を流動する水道水の水圧又はこの水圧と人為的な引き上げ操作力とによって、第２操作軸５６が第１操作軸５５に対して外端側（図の上方側）に摺動し、これに連動して第２押圧板６１の連結部６５と取付け筒体６６の連結部６７とに亘って枢支連結された係止リンク５７，５８対が拡径姿勢に屈曲しながら張り出す。   [10] Next, as shown in FIG. 15, the pair of first locking rings 79 are removed from the second presser operating rod 78, and the second presser operating rod 78 is moved from the operation extension shaft 56 </ b> B of the second operating shaft 56. When removed, the second operation shaft 56 is moved to the outer end side (upper side in the figure) with respect to the first operation shaft 55 by the water pressure of the tap water flowing through the water pipe 1 or the water pressure and the artificial pulling operation force. The pair of locking links 57 and 58 which are pivotally connected across the connecting portion 65 of the second pressing plate 61 and the connecting portion 67 of the mounting cylinder 66 are bent in a diameter-enlarging posture in conjunction with the sliding. Overhang.

この状態で、図１６に示すように、両第２係止リング８１を蓋体５４の両係止片８０から取り外し、水道水の水圧又はこの水圧と人為的な引き上げ操作力とによって、両操作軸５５，５６を蓋体５４に対して上方に摺動させると、拡径姿勢に屈曲した係止リンク５７，５８対が、拡径用弾性体５９による流路遮蔽箇所よりも上流側の内周壁面、つまり、水道管１の分岐流路開口周縁に対して係合する。   In this state, as shown in FIG. 16, both the second locking rings 81 are removed from both locking pieces 80 of the lid 54, and both operations are performed by the tap water pressure or the water pressure and the artificial pulling operation force. When the shafts 55 and 56 are slid upward with respect to the lid 54, the pair of locking links 57 and 58 bent in the diameter-enlarging posture are located on the upstream side of the flow path shielding portion by the diameter-enlarging elastic body 59. The peripheral wall surface, that is, the branch channel opening periphery of the water pipe 1 is engaged.

［１１］図１６、図１７に示すように、操作ネジ部材７６を人為的に締付け側に螺合操作すると、第２操作軸５６に対して第１操作軸５５が内端側（図の下方側）に押込み摺動され、第２押圧板６１に対する第１押圧板６０の近接移動に伴う挟圧作用により、縮径状態にある拡径用弾性体５９が分岐管部２の内周壁面に密着する拡径状態に弾性変形して、分岐管部２の内周壁面と両押圧板６０，６１の外周部との間が密封状態で遮蔽される。   [11] As shown in FIGS. 16 and 17, when the operation screw member 76 is artificially screwed to the tightening side, the first operation shaft 55 is moved to the inner end side (downward in the drawing) with respect to the second operation shaft 56. The elastic body 59 for expanding the diameter in the reduced diameter state is formed on the inner peripheral wall surface of the branch pipe portion 2 by the pressing action accompanying the proximity movement of the first pressing plate 60 with respect to the second pressing plate 61. It is elastically deformed into an expanded diameter state in close contact, and the space between the inner peripheral wall surface of the branch pipe portion 2 and the outer peripheral portions of the pressing plates 60 and 61 is shielded in a sealed state.

このとき、蓋体５４の排水管８２に接続した水栓８３の開閉操作レバー８３Ａを開き操作して放水させ、その放水が止まることで分岐管部２の流路Ｗでの遮断を確認する。   At this time, the opening / closing operation lever 83A of the faucet 83 connected to the drain pipe 82 of the lid 54 is opened to discharge water, and the blocking of the branch pipe portion 2 in the flow path W is confirmed by stopping the water discharge.

［１２］図１８に示すように、流路閉塞装置Ｅの閉塞手段Ｆを流路閉塞状態で残したまま第１操作軸５５及び第２操作軸５６から第１押え操作杆７７を撤去し、作業用開閉弁５２の下流側連結フランジ部５２Ｂから蓋体５４撤去し、更に、分岐管部２及び上流側弁箱３０から管内流路遮断装置Ａを撤去したのち、上流側弁箱３０の下流側連結フランジ部３０Ｂから作業用開閉弁５２を撤去し、更に、分岐管部２の連結フランジ部２Ａから取替え対象の一つで、作業用開閉弁５２を介して流路閉塞装置Ｅを取付けるために残置されていたバタフライ弁Ｖの上流側弁箱３０を撤去する。   [12] As shown in FIG. 18, the first presser operating rod 77 is removed from the first operating shaft 55 and the second operating shaft 56 while the closing means F of the flow path closing device E is left in the flow path closed state. After removing the lid 54 from the downstream connecting flange portion 52B of the working on-off valve 52, and further removing the pipe flow path blocking device A from the branch pipe portion 2 and the upstream valve box 30, the downstream of the upstream valve box 30 is removed. To remove the work opening / closing valve 52 from the side connection flange portion 30B, and to attach the flow path closing device E via the work opening / closing valve 52, which is one of the replacement targets from the connection flange portion 2A of the branch pipe portion 2. The upstream valve box 30 of the butterfly valve V left behind is removed.

［１３］図１９に示すように、分岐管部２の連結フランジ部２Ａに、選定された指定の機器の一例である新たな開閉弁６の上流連結フランジ部（連結部の一例）６Ａを、通常使用のボルト４Ｃ・ナット４Ｄからなる第１締結具４にて脱着自在に密封状態で締付け連結するとともに、この開閉弁６の下流連結フランジ部（連結部の一例）６Ｂには、流路閉塞装置Ｅの蓋体５４の連結フランジ部５４Ａをボルト２７・ナット２８にて密封状態で締付け連結する。 [13] As shown in FIG. 19, an upstream connection flange portion (an example of a connection portion) 6A of a new on-off valve 6 that is an example of a selected designated device is connected to the connection flange portion 2A of the branch pipe portion 2. The first fastener 4 composed of a normally used bolt 4C and nut 4D is detachably tightened and connected in a sealed state, and a downstream connection flange portion (an example of a connection portion) 6B of the on-off valve 6 has a flow path blockage. The connecting flange portion 54A of the lid 54 of the device E is tightened and connected with bolts 27 and nuts 28 in a sealed state.

次に、開閉弁６のボール弁体６Ｃを開き操作し、両操作軸５５，５６を蓋体５４に対して上方に引き上げ移動させ、閉塞手段Ｆ及び抜止め手段Ｇを蓋体５４の格納室５４Ｃ内に格納したのち、開閉弁６のボール弁体６Ｃを閉じ操作する。   Next, the ball valve body 6C of the on-off valve 6 is opened, both operating shafts 55 and 56 are moved upward with respect to the lid body 54, and the closing means F and the retaining means G are placed in the storage chamber of the lid body 54. After storing in 54C, the ball valve body 6C of the on-off valve 6 is closed.

［１４］図２０に示すように、開閉弁６の下流連結フランジ部６Ｂから流路閉塞装置Ｅの蓋体５４を撤去したのち、この開閉弁６の下流連結フランジ部６Ｂに、選定された指定機器の一例である新たな空気弁３の連結フランジ部（連結部の一例）３Ａを、ボルト５Ａ・ナット５Ｂからなる第２締結具５にて脱着自在に密封状態で締付け連結する。 [14] As shown in FIG. 20, after removing the lid 54 of the flow path closing device E from the downstream connection flange portion 6B of the on-off valve 6, the specified designation is applied to the downstream connection flange portion 6B of the on-off valve 6. A connecting flange portion (an example of a connecting portion) 3A of a new air valve 3 which is an example of the device is detachably tightened and connected by a second fastener 5 including a bolt 5A and a nut 5B.

〔第２実施形態〕
上述の第１実施形態では、水道管１の分岐管部（流体管部の一例）２にバタフライ弁Ｖを介して空気弁３を取付けてある場合について説明したが、本発明の技術は、図２１〜図２５に示すように、水道管１の分岐管部２に空気弁３が直接取付けられている場合についても適用することができる。
前記空気弁３は、図２１に示すように、流路軸芯方向で分離可能に連結された三つの部材（機器ケースの一例）、つまり、分岐管部２の連結フランジ部２Ａに固定連結可能な連結フランジ部３Ａを備えたケース本体３Ｂと、このケース本体３Ｂの上端に形成された第１接合部３ａに対してボルト２７で脱着自在に固定連結される第２接合部３ｂを備えた上部ケース３Ｃと、この上部ケース３Ｃの上端に形成された第３接合部３ｃに対してボルト（締結具の一例）２７で脱着自在に固定連結される第４接合部３ｄを備えたカバー３Ｄが備えられているとともに、ケース本体３Ｂと上部ケース３Ｃとで囲まれた内部には、ボール弁体３Ｅを一定範囲内で上下動自在に支持する支持ケース３Ｆと、ボール弁体３Ｅによって開閉される排気路３Ｇを備えた内ケース３Ｈが脱着可能に装着されている。 [Second Embodiment]
In the above-described first embodiment, the case where the air valve 3 is attached to the branch pipe portion (an example of the fluid pipe portion) 2 of the water pipe 1 via the butterfly valve V has been described. As shown in FIG. 21 to FIG. 25, the present invention can also be applied to the case where the air valve 3 is directly attached to the branch pipe portion 2 of the water pipe 1.
As shown in FIG. 21, the air valve 3 can be fixedly connected to three members (an example of an equipment case) that are detachably connected in the axial direction of the flow path, that is, the connecting flange portion 2 </ b> A of the branch pipe portion 2. An upper portion having a case main body 3B provided with a connecting flange portion 3A and a second joint portion 3b fixedly connected to the first joint portion 3a formed at the upper end of the case main body 3B by a bolt 27 so as to be detachable. A cover 3D including a case 3C and a fourth joint 3d that is detachably fixedly connected to the third joint 3c formed at the upper end of the upper case 3C by a bolt (an example of a fastener) 27 is provided. In addition, inside the case body 3B and the upper case 3C, a support case 3F that supports the ball valve element 3E so as to be movable up and down within a certain range, and an exhaust gas that is opened and closed by the ball valve element 3E. Equipped with road 3G Case 3H is detachably mounted to the inner was.

そして、前記ケース本体３Ｂから上部ケース３Ｃを分離すると、ボール弁体３Ｅを支持する支持ケース３Ｆと排気路３Ｇを備えた内ケース３Ｈを外部に簡単に抜き出すことができるため、ケース本体３Ｂ側には、流路閉塞装置Ｅの閉塞手段Ｆの挿入に邪魔になる空気弁３の構成部材、つまり、空気弁３のボルト２７、支持ケース３Ｆ、内ケース３Ｈ等の内部構成部材や上部ケース３Ｃ、カバー３Ｄ等の外部構成部材が存在しない。
それ故に、分解されたケース本体３Ｂの第１接合部３ａを利用して、図２５に示すように、作業用開閉弁５２が連結筒５３を介して密封状態で固定連結可能に構成され、第１接合部３ａの分離接合面が、作業用開閉弁５２を介して流路閉塞装置Ｅを取付けるため接合部に構成されている。 When the upper case 3C is separated from the case main body 3B, the support case 3F that supports the ball valve body 3E and the inner case 3H that includes the exhaust passage 3G can be easily extracted to the outside. Are components of the air valve 3 that hinder the insertion of the closing means F of the flow path closing device E, that is, internal components such as the bolt 27 of the air valve 3, the support case 3F, the inner case 3H, the upper case 3C, There are no external components such as the cover 3D.
Therefore, using the disassembled first joint portion 3a of the case main body 3B, as shown in FIG. 25, the work on-off valve 52 is configured to be fixedly connectable in a sealed state via the connecting cylinder 53, and A separation joint surface of the one joint portion 3 a is configured as a joint portion for attaching the flow path closing device E via the work on-off valve 52.

次に、水道管１内の上水の流れを維持した不断水状態のまま、劣化による漏水や故障等の理由で空気弁３を、図２０に示すような選定された指定の新たな開閉弁６及び新たな空気弁３に取り替える方法について説明する。
［１］先ず、図２１に示すように、分岐管部２の連結フランジ部２Ａと空気弁３の連結フランジ部３Ａとを締付け連結している第１締結具４の通常仕様の複数組のボルト４Ｃ，４Ｄ（図２０参照）を、一組又は二組単位で防水仕様のボルト４Ａ・袋ナット４Ｂに取り替える。 Next, the new designated on-off valve selected as shown in FIG. 20 is used for the air valve 3 due to water leakage or failure due to deterioration while maintaining the flow of clean water in the water pipe 1. 6 and a method of replacing with a new air valve 3 will be described.
[1] First, as shown in FIG. 21, a plurality of bolts of a normal specification of the first fastener 4 in which the connecting flange portion 2A of the branch pipe portion 2 and the connecting flange portion 3A of the air valve 3 are fastened and connected. 4C and 4D (see FIG. 20) are replaced with waterproof bolts 4A and cap nuts 4B in one or two sets.

［２］図２２に示すように、遮断作業ケースＢの環状弾性シール材１１を弾性復元力に抗して拡径変形させた状態で空気弁３を経由して分岐管部２の連結フランジ部２Ａの外周面と空気弁３の連結フランジ部３Ａの外周面とにわたる部位に外装すると、この環状弾性シール材１１の縮径側への弾性復帰により、環状弾性シール材１１の両第１シール部１１ａが両連結フランジ部２Ａ，３Ａの外周面に設定圧接力よりも小さな弾性力で圧接されると同時に、環状弾性シール材１１の第２シール部１１ｂが両連結フランジ部２Ａ，３Ａの隣接間に形成されている環状凹部２５に一部が入り込む状態で設定圧接力よりも小さな弾性力で圧接され、環状弾性シール材１１が両連結フランジ部２Ａ，３Ａに弾性力で保持される。   [2] As shown in FIG. 22, the connecting flange portion of the branch pipe portion 2 via the air valve 3 in a state where the annular elastic sealing material 11 of the shut-off work case B is expanded and deformed against the elastic restoring force. When the outer circumferential surface of 2A and the outer circumferential surface of the connecting flange portion 3A of the air valve 3 are externally mounted, both first seal portions of the annular elastic sealing material 11 are elastically returned to the reduced diameter side of the annular elastic sealing material 11. 11a is pressed against the outer peripheral surfaces of both connecting flange portions 2A, 3A with an elastic force smaller than the set pressure contact force, and at the same time, the second seal portion 11b of the annular elastic sealing material 11 is located between the adjacent connecting flange portions 2A, 3A. In a state in which a part of the annular recess 25 is formed, the pressure is pressed with an elastic force smaller than the set pressure contact force, and the annular elastic seal material 11 is held by the connecting flange portions 2A and 3A with the elastic force.

［３］次に、前記環状弾性シール材１１の外周面に遮断作業ケースＢの一対の締付け分割輪１２Ａを当て付け、各締付け分割輪１２Ａの周方向両端部に固着された連結片１２Ｂのうち、仕切板弁８の抜き差し方向で相対向する連結片１２Ｂ同士を、ボルト１２Ｃ・ナット１２Ｄにて引寄せ固定し、第１締結具４の緩み操作に伴う分岐管部２と空気弁３との水圧による相対離脱移動を許容する状態で、環状弾性シール材１１の両第１シール部１１ａが両連結フランジ部２Ａ，３Ａの外周面に設定圧接力で密封圧接されると同時に、環状弾性シール材１１の第２シール部１１ｂが両連結フランジ部２Ａ，３Ａの隣接間の環状凹部２５に設定圧接力で密封圧接される。（第１実施形態の図３〜図９参照） [3] Next, of the connecting pieces 12B fixed to the circumferential end portions of each of the clamping divided wheels 12A by applying a pair of clamping divided wheels 12A of the blocking work case B to the outer circumferential surface of the annular elastic sealing material 11 The connecting pieces 12B facing each other in the insertion / removal direction of the partition valve 8 are pulled and fixed with bolts 12C and nuts 12D, and the branch pipe portion 2 and the air valve 3 are connected with the loosening operation of the first fastener 4. At the same time that both first seal portions 11a of the annular elastic sealing material 11 are hermetically pressed against the outer peripheral surfaces of both the connecting flange portions 2A and 3A with a set pressure force in a state in which relative separation movement by water pressure is allowed, the annular elastic sealing material. Eleventh second seal portion 11b is hermetically pressed with an annular recess 25 between adjacent ones of both connecting flange portions 2A and 3A with a set pressure contact force. (See FIGS. 3 to 9 of the first embodiment)

このように遮断作業ケースＢが分岐管部２及び空気弁３に取付けられた状態では、仕切板弁８の薄板状弁板８Ａの大部分が、摺動ガイド手段Ｃを構成する弁ケース１５の収納空間１４内に収納され、仕切板弁８の半円弧状先端縁８ａの一部のみが締付け輪１２のスリット状開口１２ａに摺動自在に入り込んでいる。   In this state where the shut-off work case B is attached to the branch pipe portion 2 and the air valve 3, most of the thin plate-like valve plate 8 </ b> A of the partition plate valve 8 is the valve case 15 constituting the sliding guide means C. Only a part of the semicircular tip end edge 8 a of the partition valve 8 is slidably inserted into the slit-shaped opening 12 a of the fastening ring 12.

また、第１締結具４のボルト４Ａ・袋ナット４Ｂの緩み操作代の範囲内で両連結フランジ部２Ａ，３０Ａの接合面間を押し広げるための隙間形成手段Ｄを構成する各分離ボルト１３は、それのテーパー面１３ｂが両連結フランジ部２Ａ，３０Ａの隣接間の環状凹部２５に臨むだけで、それ以外の大部分は両締付け分割輪１２Ａの外周面に固着されたネジ筒体２０内に保持されている。   In addition, each separation bolt 13 constituting the gap forming means D for expanding the space between the joint surfaces of both the connecting flange portions 2A and 30A within the range of the loosening operation allowance of the bolt 4A and the cap nut 4B of the first fastener 4 is The taper surface 13b only faces the annular recess 25 between the two adjacent connecting flange portions 2A and 30A, and the rest of the taper surface 13b is in the screw cylinder 20 fixed to the outer peripheral surface of the tightening split ring 12A. Is retained.

［４］次に、図２３に示すように、第１締結具４のボルト４Ａ・袋ナット４Ｂを設定隙間Ｓに相当する寸法分だけ緩み操作して、両連結フランジ部２Ａ，３Ａの接合面間に、仕切板弁８の薄板状弁板８Ａが少し余裕をもって進入可能な隙間Ｓを現出する。このとき、各分離ボルト１３の後端部（径方向外方側端部）に形成されている操作係合穴１３ｃをレンチ等の操作具で回転操作して、両連結フランジ部２Ａ，３Ａの隣接間の環状凹部２５に臨む各分離ボルト１３のテーパー面１３ｂを径方向内方側に螺合移動させ、第１締結具４の緩み操作代の範囲内で両連結フランジ部２Ａ，３Ａ間を強制的に押し広げる。 [4] Next, as shown in FIG. 23, the bolt 4A and the cap nut 4B of the first fastener 4 are loosened by a dimension corresponding to the set gap S, and the joint surfaces of the two connecting flange portions 2A and 3A. In the meantime, a gap S in which the thin plate-like valve plate 8A of the partition valve 8 can enter with a slight margin appears. At this time, the operation engagement hole 13c formed in the rear end portion (radially outward end portion) of each separation bolt 13 is rotated with an operation tool such as a wrench, so that both the connecting flange portions 2A and 3A The taper surface 13b of each separation bolt 13 facing the annular recess 25 between adjacent ones is screwed and moved radially inward, and between the connecting flange portions 2A and 3A within the range of the loosening operation allowance of the first fastener 4. Force to spread.

［５］そして、両連結フランジ部２Ａ，３Ａの接合面間の設定隙間Ｓを通して仕切板弁８の薄板状弁板８Ａを流路遮断位置にまで差し込み操作すると、分岐管部２の連結フランジ部２Ａと空気弁３の側連結フランジ部３Ａとの間において、水道管１の管軸芯Ｘに対して直交する分岐軸芯Ｙ方向の管内流路Ｗが遮断される。 [5] When the thin plate-like valve plate 8A of the partition plate valve 8 is inserted to the flow path blocking position through the set gap S between the joint surfaces of the two connecting flange portions 2A and 3A, the connecting flange portion of the branch pipe portion 2 is operated. Between the pipe 2 </ b> A and the side connection flange portion 3 </ b> A of the air valve 3, the pipe flow path W in the branch axis Y direction perpendicular to the pipe axis X of the water pipe 1 is blocked.

［６］図２４に示すように、上述の仕切板弁８による管内流路Ｗの遮断状態において、空気弁３を分解する、つまり、ケース本体３Ｂの第１接合部３ａと上部ケース３Ｃの第２接合部３ｂとを締付け連結しているボルト２７を取り外して、取替え対象である空気弁３のケース本体３Ｂから上部ケース３Ｃ、カバー３Ｄ、ボール弁体３Ｅ、支持ケース３Ｆ、内ケース３Ｈを分解撤去する。
この分解撤去後のケース本体３Ｂ側には、流路閉塞装置Ｅの閉塞手段Ｆの挿入に邪魔になる空気弁３のボルト２７、支持ケース３Ｆ、内ケース３Ｈ等の内部構成部材や上部ケース３Ｃ、カバー３Ｄ等の外部構成部材が存在しないため、分解されたケース本体３Ｂの第１接合部３ａの分離接合面が、作業用開閉弁５２を介して流路閉塞装置Ｅを取付けるため接合部に構成されている。 [6] As shown in FIG. 24, the air valve 3 is disassembled in the blocked state of the pipe flow path W by the partition plate valve 8, that is, the first joint 3a of the case body 3B and the first joint 3C of the upper case 3C. 2 Remove the bolt 27 that is tightened and connected to the joint 3b, and disassemble the upper case 3C, cover 3D, ball valve element 3E, support case 3F, and inner case 3H from the case body 3B of the air valve 3 to be replaced. Remove.
On the side of the case body 3B after disassembly and removal, internal components such as the bolt 27 of the air valve 3, the support case 3F, the inner case 3H, and the upper case 3C are obstructed to insert the closing means F of the flow path closing device E. Since there is no external component such as the cover 3D, the separated joint surface of the first joint portion 3a of the disassembled case main body 3B is attached to the joint portion for attaching the flow path closing device E via the work on-off valve 52. It is configured.

［７］図２５に示すように、ケース本体３Ｂの第１接合部３ａに、連結筒５３の上流側連結フランジ部５３Ａをボルト２７にて密封状態で固定連結するとともに、連結筒５３の下流側連結フランジ部５３Ｂには、作業用開閉弁５２の上流側連結フランジ部５２Ａをボルト２７・ナット２８にて密封状態で固定連結する。 [7] As shown in FIG. 25, the upstream connection flange portion 53A of the connection tube 53 is fixedly connected to the first joint 3a of the case body 3B with a bolt 27 in a sealed state, and the downstream side of the connection tube 53 The upstream connection flange 52A of the work on-off valve 52 is fixedly connected to the connection flange 53B in a sealed state with bolts 27 and nuts 28.

尚、これ以降のステップの説明は、第１実施形態で説明した［８］〜［１４］のステップと実質的に同一であるため省略する。
また、その他の構成は、第１実施形態で説明した構成と同一であるから、同一の構成箇所には、第１実施形態と同一の番号を付記してそれの説明は省略する。 In addition, description of the subsequent steps is substantially the same as the steps [8] to [14] described in the first embodiment, and thus will be omitted.
In addition, since the other configuration is the same as the configuration described in the first embodiment, the same components are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted.

〔第３実施形態〕
上述の第１実施形態及び第２実施形態では、前記機器（バタフライ弁Ｖ、空気弁３）を分解し、連結部（連結フランジ部３０Ａ，３Ａ）を備えた残置機器ケース（上流側弁箱３０、ケース本体３Ｂ）の接合部（下流側連結フランジ部３０Ｂ、第１接合部３ａ）に、仕切板弁８による流路遮断位置よりも上流側の流路を閉塞可能な流路閉塞装置Ｅを取付けるための作業用開閉弁５２を直接又は連結筒５３を介して密封状態で取付けたが、図２６に示すように、前記機器（バタフライ弁Ｖ）を分解し、仕切板弁８による流路遮断位置よりも上流側の流路を閉塞可能な流路閉塞装置Ｅの閉塞手段Ｆの挿入を阻害する内部構成部材（両弁軸ボルト３２，３３、弁体３４）を除去した状態で再び組付けた密封性のある機器（バタフライ弁Ｖ）の連結部（下流側連結フランジ部３１Ｂ）に、前記流路閉塞装置Ｅを取付けるための作業用開閉弁５２を直接又は連結筒５３を介して密封状態で取付けてもよい。 [Third Embodiment]
In the first and second embodiments described above, the device (the butterfly valve V, the air valve 3) is disassembled, and the remaining device case (upstream valve box 30) including the connecting portions (the connecting flange portions 30A and 3A). , A flow path closing device E capable of closing the flow path upstream of the flow path blocking position by the partition plate valve 8 at the joint portion (downstream connecting flange portion 30B, first joint portion 3a) of the case body 3B). The work opening / closing valve 52 for attachment is attached in a sealed state directly or via the connecting cylinder 53. However, as shown in FIG. 26, the device (butterfly valve V) is disassembled, and the flow path is blocked by the partition plate valve 8. Reassembled with the internal components (both valve shaft bolts 32, 33, valve body 34) hindering insertion of the closing means F of the flow path closing device E capable of closing the flow path upstream of the position removed. Connecting part (butterfly valve V) The flow-side joining flange portions 31B), it may be attached in a sealed state via the working-off valve 52 directly or coupling tube 53 for mounting the channel closure device E.

この第３実施形態では、前記両弁軸ボルト３２，３３が除去された下流側弁箱３１の各貫通孔には、密封性を維持するための栓部材８５，８６を装着するとともに、内部構成部材である両弁軸ボルト３２，３３及び弁体３４が除去された中空状のバタフライ弁Ｖの下流側連結フランジ部３１Ｂに、連結筒５３を介して流路閉塞装置Ｅを密封状態で固定連結することになる。
そのため、機器交換工法のうち、上述のステップ以外は第１実施形態で説明したステップと実質的に同一であるため、その説明は省略する。
また、その他の構成は、第１実施形態で説明した構成と同一であるから、同一の構成箇所には、第１実施形態と同一の番号を付記してそれの説明は省略する。 In the third embodiment, plug members 85 and 86 for maintaining the sealing performance are attached to the respective through holes of the downstream valve box 31 from which both the valve shaft bolts 32 and 33 have been removed, and the internal configuration. The flow path closing device E is fixedly connected in a sealed state to the downstream connecting flange portion 31B of the hollow butterfly valve V from which the valve shaft bolts 32 and 33 and the valve body 34, which are members, are removed, via a connecting cylinder 53. Will do.
For this reason, in the device replacement method, the steps other than the steps described above are substantially the same as the steps described in the first embodiment, and thus the description thereof is omitted.
In addition, since the other configuration is the same as the configuration described in the first embodiment, the same components are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted.

〔その他の実施形態〕
（１）上述の第１実施形態では、水道管等の流体管１の途中に分岐管部２を一体形成してある流体配管系統について説明したが、流体管１に、それの周方向に沿って脱着自在に固定連結される複数の分割継手体を備え、かつ、一つの分割継手体に流体管１に形成された貫通孔に対して管径方向から連通する分岐管部２を突設してある管継手が装着されているとともに、管継手の分岐管部に開閉弁（バタフライ弁等）、空気弁、消火栓等機器の一つ又は複数個が取付けられている流体配管系統に本願発明の技術を適用してもよい。
（２）上述の第１実施形態では、遮断作業ケースＢの弾性シール材１１を環状に一体形成したが、この弾性シール材１１を周方向で複数に分割してもよい。
要するに、遮断作業ケースＢとしては、両連結フランジ部２Ａ，３０Ａの外周を密封する状態で両連結フランジ部２Ａ，３０Ａに対して脱着自在に装着することのできるものであればよい。
（３）上述の第１実施形態では、第１締結具４の緩み操作を許容する状態で両連結フランジ部２Ａ，３０Ａの外周を密封状態で囲繞可能で、かつ、両連結フランジ部２Ａ，３０Ａの接合面間において流路Ｗを遮断可能な薄板状の仕切板弁８が抜き差し操作自在に設けられている遮断作業ケースＢを装着したが、この遮断作業ケースＢとしては、第１締結具４を外部から緩み操作可能な状態で両連結フランジ部２Ａ，３０Ａ全体を密封囲繞できるものであってもよい。
（４）上述の第１実施形態では、前記隙間形成手段Ｄを、遮断作業カバーＢの周方向複数箇所において、両連結フランジ部２Ａ，３０Ａ間の隙間Ｓに対して径方向外方から入り込み移動するテーパー面１３ｂを備えた複数の分離ボルト１３から構成したが、この構成に限定されるものではなく、例えば、径方向内方に入り込み付勢された複数の楔部材を設けて実施してもよい。
要するに、前記隙間形成手段Ｄとしては、第１締結具４の緩み操作代の範囲内で両連結フランジ部２Ａ，３０Ａの接合面間を強制的に押し広げることのできるものであれば、如何なる構造のものを採用してもよい。
（５）前記仕切板弁８としては、第１締結具４の緩み操作によって発生した両連結フランジ部２Ａ，３０Ａ間の隙間Ｓを通して管内流路Ｗを遮断する位置にまで差込み移動自在な薄板状のものであれば、如何なる形状のものを用いてもよい。
（６）上述の第１・第２実施形態では、前記機器（バタフライ弁Ｖ、空気弁３）を分解し、連結部（連結フランジ部３０Ａ，３Ａ）を備えた残置機器ケース（上流側弁箱３０、ケース本体３Ｂ）の接合部（下流側連結フランジ部３０Ｂ、第１接合部３ａ）に、流路閉塞装置Ｅを取付けるための作業用開閉弁５２を直接又は連結筒５３を介して密封状態で取付けたが、残置機器ケース（上流側弁箱３０、ケース本体３Ｂ）の接合部（下流側連結フランジ部３０Ｂ、第１接合部３ａ）に、流路閉塞装置Ｅを直接又は連結筒５３を介して密封状態で取付けてもよい。
（７）上述の第３実施形態では、前記機器（バタフライ弁Ｖ）を分解し、仕切板弁８による流路遮断位置よりも上流側の流路を閉塞可能な流路閉塞装置Ｅの閉塞手段Ｆの挿入を阻害する内部構成部材（両弁軸ボルト３２，３３、弁体３４）を除去した状態で再び組付けた密封性のある機器（バタフライ弁Ｖ）の連結部（下流側連結フランジ部３１Ｂ）に、前記流路閉塞装置Ｅを取付けるための作業用開閉弁５２を直接又は連結筒５３を介して密封状態で取付けたが、再び組付けた密封性のある機器（バタフライ弁Ｖ）の連結部（下流側連結フランジ部３１Ｂ）に、流路閉塞装置Ｅを直接又は連結筒５３を介して密封状態で取付けてもよい。 [Other Embodiments]
(1) In the first embodiment described above, the fluid piping system in which the branch pipe portion 2 is integrally formed in the middle of the fluid pipe 1 such as a water pipe has been described, but the fluid pipe 1 is provided along the circumferential direction thereof. And a branch pipe portion 2 that protrudes from the pipe radial direction with respect to a through-hole formed in the fluid pipe 1 in one split joint body. The present invention is applied to a fluid piping system in which one or a plurality of devices such as an on-off valve (butterfly valve), an air valve, a fire hydrant, and the like are attached to a branch pipe portion of the pipe joint. Technology may be applied.
(2) In the first embodiment described above, the elastic sealing material 11 of the blocking work case B is integrally formed in an annular shape, but the elastic sealing material 11 may be divided into a plurality in the circumferential direction.
In short, the blocking work case B may be any one that can be detachably attached to both the connecting flange portions 2A and 30A in a state where the outer periphery of the both connecting flange portions 2A and 30A is sealed.
(3) In the first embodiment described above, the outer periphery of both the connecting flange portions 2A and 30A can be enclosed in a sealed state in a state where the loosening operation of the first fastener 4 is allowed, and both the connecting flange portions 2A and 30A. A shut-off work case B in which a thin plate-like partition plate valve 8 capable of shutting off the flow path W between the joint surfaces is provided so as to be freely inserted and removed is used as the shut-off work case B. The connecting flange portions 2A and 30A may be hermetically sealed so that they can be loosely operated from the outside.
(4) In the first embodiment described above, the gap forming means D is moved from the radially outer side into the gap S between the two connecting flange portions 2A and 30A at a plurality of locations in the circumferential direction of the blocking work cover B. However, the present invention is not limited to this configuration. For example, a plurality of wedge members that are urged inward in the radial direction may be provided. Good.
In short, as the gap forming means D, any structure can be used as long as the gap between the joint surfaces of the two connecting flange portions 2A and 30A can be forcibly expanded within the range of the loosening operation allowance of the first fastener 4. May be adopted.
(5) The partition plate valve 8 is a thin plate that can be inserted and moved to a position where the pipe flow path W is blocked through the gap S between the two connecting flange portions 2A and 30A generated by the loosening operation of the first fastener 4. Any shape may be used as long as it is.
(6) In the first and second embodiments described above, the device (the butterfly valve V, the air valve 3) is disassembled, and the remaining device case (upstream valve box) provided with the connecting portions (connecting flange portions 30A, 3A). 30, the work on / off valve 52 for attaching the flow path closing device E is sealed directly or via the connecting cylinder 53 to the joint portion (downstream connecting flange portion 30B, first joint portion 3a) of the case body 3B). The flow path blocking device E is directly or directly connected to the joining portion (downstream connecting flange portion 30B, first joining portion 3a) of the remaining device case (upstream valve box 30, case body 3B). It may be attached in a sealed state.
(7) In the third embodiment described above, the device (butterfly valve V) is disassembled, and the blocking means of the flow path closing device E capable of closing the flow path upstream of the flow path blocking position by the partition plate valve 8. Connecting portion (downstream connecting flange portion) of a sealing device (butterfly valve V) reassembled with the internal components (both valve shaft bolts 32, 33, valve body 34) hindering insertion of F removed. 31B), the working on-off valve 52 for attaching the flow path closing device E is attached in a sealed state, directly or via the connecting cylinder 53, but the re-assembled device (butterfly valve V) is attached again. You may attach the flow-path obstruction | occlusion apparatus E to a connection part (downstream side connection flange part 31B) directly or via the connection cylinder 53 in the sealed state.

本願発明の流体配管系器具交換方法の第１実施形態における器具交換前の管接続構造の側面図The side view of the pipe connection structure before the instrument replacement | exchange in 1st Embodiment of the fluid piping system instrument replacement | exchange method of this invention. 防水仕様のボルト・ナットに交換したときの一部切欠拡大側面図Partially cut away enlarged side view when replaced with waterproof bolts and nuts 管内流路遮断装置を装着したときの一部切欠側面図Partially cutaway side view when the pipe flow path blocking device is installed 管内流路遮断装置を装着したときの一部切欠平面図Partially cutaway plan view when the pipe flow path blocking device is installed 仕切弁体と分離ボルトとの関係を示す要部の拡大断面側面図Enlarged cross-sectional side view of the main part showing the relationship between the gate valve body and the separation bolt 両連結フランジ部と環状弾性シール材との関係を示す要部の拡大断面側面図Enlarged cross-sectional side view of the main part showing the relationship between both connecting flange parts and the annular elastic sealing material 仕切弁板を流路遮断位置に差し込み操作したときの一部切欠側面図Partially cutaway side view when the gate valve plate is inserted into the flow path blocking position 環状弾性シール材の斜視図Perspective view of annular elastic sealing material 環状弾性シール材の断面図Cross section of annular elastic sealing material 空気弁及び下流側弁箱を分離したときの一部切欠側面図Partially cutaway side view with air valve and downstream valve box separated 連結筒及び作業用開閉弁を装着したときの一部切欠側面図Partially cutaway side view with connecting cylinder and work on / off valve 仕切弁板を流路開放位置に引き抜き操作したときの一部切欠側面図Partially cutaway side view when the gate valve plate is pulled out to the open channel position 作業用開閉弁に流路閉塞装置を取付けたときの一部切欠側面図Partially cutaway side view of the on-off valve for work with a flow path blocking device attached 閉塞手段及び抜止め手段を水道管側に下降させたときの一部切欠側面図Partially cutaway side view when closing means and retaining means are lowered to the water pipe side 抜止め手段のリンク対を拡径姿勢に屈曲させたときの一部切欠側面図Partially cutaway side view when the link pair of retaining means is bent in an expanded posture 拡径用弾性体で流路を遮断したときの一部切欠側面図Partially cutaway side view when the flow path is blocked with an elastic body for diameter expansion 拡径用弾性体で流路を遮断したときの要部の拡大断面図Enlarged cross-sectional view of the main part when the flow path is blocked by the elastic body for diameter expansion 第１押え操作杆、蓋体を除去したのち、作業用開閉弁及び上流側弁箱を水道管の分岐管部から取り外したときの一部切欠き側面図Partially cutaway side view when the work clamp and upstream valve box are removed from the branch pipe of the water pipe after removing the first presser foot and the lid 水道管の分岐管部に新たな開閉弁及び流路閉塞装置の蓋体を取付けたときの要部の断面側面図Cross-sectional side view of the main part when a new opening / closing valve and a lid of a flow path closing device are attached to the branch pipe of the water pipe 開閉弁に新たな空気弁を取付けたときの側面図Side view when a new air valve is attached to the open / close valve 本願発明の流体配管系器具交換方法の第２実施形態を示し、防水仕様のボルト・ナットに交換したときの一部切欠拡大側面図The second embodiment of the fluid piping system appliance replacement method of the present invention is shown, partially cut away enlarged side view when replaced with waterproof bolts and nuts 管内流路遮断装置を装着したときの一部切欠側面図Partially cutaway side view when the pipe flow path blocking device is installed 仕切弁板を流路遮断位置に差し込み操作したときの一部切欠側面図Partially cutaway side view when the gate valve plate is inserted into the flow path blocking position 空気弁を分解したときの一部切欠側面図Partially cutaway side view when the air valve is disassembled 連結筒及び作業用開閉弁を装着したときの一部切欠側面図Partially cutaway side view with connecting cylinder and work on / off valve 本願発明の流体配管系器具交換方法の第３実施形態を示し、中空状のバタフライ弁に作業用開閉弁を装着したときの一部切欠側面図The fluid piping system instrument exchange method of the present invention is shown in a third embodiment, and a partially cutaway side view when a work on / off valve is mounted on a hollow butterfly valve

符号の説明Explanation of symbols

Ｂ 遮断作業ケース
Ｄ 隙間形成手段
Ｅ 流路閉塞装置
Ｆ 閉塞手段
Ｓ 隙間
Ｖ 機器（バタフライ弁）
Ｗ 管内流路
１ 流体管（水道管）
２ 流体管部（分岐管部）
２Ａ 連結部（連結フランジ部）
３ 機器（空気弁）
３Ａ 連結部（連結フランジ部）
４ 締結具（第１締結具）
６ 機器（開閉弁）
８ 仕切弁板
２７ 締結具（ボルト）
３０ 機器ケース（上流側弁箱）
３０Ａ 連結部（上流側連結フランジ部）
３０Ｂ 連結部（下流側連結フランジ部）
３１ 機器ケース（上流側弁箱）
３１Ａ 連結部（上流側連結フランジ部）
３１Ｂ 連結部（下流側連結フランジ部）
５２ 作業用開閉弁
５３ 連結筒
５４ 蓋体
５４Ｃ 格納室 B Blocking work case D Clearance forming means E Flow path closing device F Closure means S Clearance V Equipment (butterfly valve)
W Pipe flow path 1 Fluid pipe (water pipe)
2 Fluid pipe part (branch pipe part)
2A connecting part (connecting flange part)
3 Equipment (Air valve)
3A Connecting part (connecting flange part)
4 fasteners (first fasteners)
6 Equipment (open / close valve)
8 Gate valve plate 27 Fastener (bolt)
30 Equipment case (upstream valve box)
30A connecting part (upstream connecting flange part)
30B connecting part (downstream connecting flange part)
31 Equipment case (upstream valve box)
31A Connecting part (Upstream connecting flange part)
31B connecting part (downstream connecting flange part)
52 Work On / Off Valve 53 Connecting Tube
54 lids
54C storage room

Claims (7)

流体配管系統中に接続され、且つ、流路軸芯方向で分離可能に連結された複数の機器ケースを備えた機器の上流側に、締結具にて脱着自在に密封状態で締付け連結される連結部が設けられている流体配管系において、管内流体の流れを断たない不断流状態で前記機器を指定機器に取り替える流体配管系の機器交換方法であって、以下の１）〜３）のステップを備えていることを特徴とする。
１）前記締結具を緩み操作して両連結部間に隙間を現出し、この隙間を通して仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断する。
２）前記機器を、連結部側の残置機器ケースを残して分解し、該残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側に挿入して流路を閉塞可能な閉塞手段と、当該閉塞手段を格納可能な格納室を有する蓋体とを備えた流路閉塞装置の前記蓋体を、前記残置機器ケースの接合部に直接又は連結筒を介して密封状態で取付け、前記両連結部間から仕切板弁を流路開放位置に操作したのち、前記蓋体内の閉塞手段を、残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側の流路閉塞位置に送り込んで、前記両連結部よりも上流側の流路を閉塞する。
３）前記流路閉塞装置の少なくとも閉塞手段を流路閉塞位置に残置したまま、前記残置機器ケース、及び流路閉塞装置の蓋体を含む、前記残置機器ケースの下流側に連結されたものを前記連結部から取り外したのち、前記連結部に開閉弁を密封状態で取付け、該開閉弁の下流側に、前記流路閉塞装置の蓋体を密封状態で取付け、前記開閉弁を開き操作して流路閉塞位置に残置されていた閉塞手段を蓋体の格納室内に格納し、前記開閉弁を閉じ操作する。その後、前記開閉弁から前記蓋体を含む流路遮断装置の残置構成部材を撤去するとともに、前記開閉弁に指定機器を密封状態で連結し、前記仕切板弁を流路閉塞後の適宜時期に撤去する。 A coupling that is connected in the fluid piping system and that is connected to the upstream side of a device that includes a plurality of device cases that are separably coupled in the direction of the flow axis, and is detachably tightened and connected by a fastener. In the fluid piping system provided with a section, a device replacement method for a fluid piping system in which the device is replaced with a designated device in an uninterrupted state without interrupting the flow of fluid in the tube, and the following steps 1) to 3) It is characterized by having.
1) The fastener is loosened to reveal a gap between the two connecting portions, and the flow path is blocked between the two connecting portions by inserting the partition plate valve into the flow blocking position through the gap.
2) Closure means capable of closing the flow path by disassembling the device leaving a remaining device case on the connecting portion side , and inserting the device into the upstream side of the flow passage blocking position by the partition plate valve through the interior of the remaining device case. When, the lid of the passage closing device provided with a lid having a storage chamber capable of storing said closure means, mounted in a sealed state via a direct or connecting tube to the joints of the leaving device case, the After the partition plate valve is operated to the flow path open position from between the two connecting portions, the closing means in the lid body is passed through the inside of the remaining device case to the flow path closed position upstream of the flow path blocking position by the partition plate valve. Then, the flow path on the upstream side of both the connecting portions is closed.
3) What is connected to the downstream side of the remaining equipment case including the remaining equipment case and the lid of the flow path closing device while leaving at least the closing means of the flow path closing device at the flow path closing position. After removal from the connecting portion, mounted off valve sealingly to the connecting portion, on the downstream side of the opening and closing valve, the cover of the channel closure device mounted sealingly, by operating to open the on-off valve The closing means left at the channel closing position is stored in the storage chamber of the lid, and the on-off valve is closed. Thereafter, the remaining structural member of the flow path shut-off device including the lid is removed from the on-off valve, a designated device is connected to the on- off valve in a sealed state, and the partition plate valve is appropriately timed after the flow path is closed. Remove . 流体管部の連結部とこれに連通接続され、且つ、流路軸芯方向で分離可能に連結された複数の機器ケースを備えた機器の連結部とが密封状態で脱着自在に締結具にて締付け連結されている流体配管系において、管内流体の流れを断たない不断流状態で前記機器を指定機器に取り替える流体配管系の機器交換方法であって、以下の１）〜３）のステップを備えていることを特徴とする。
１）前記締結具を緩み操作して流体管部の連結部と機器の連結部との間に隙間を現出し、この隙間を通して仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断する。
２）前記機器を、連結部側の残置機器ケースを残して分解し、該残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側に挿入して流路を閉塞可能な閉塞手段と、当該閉塞手段を格納可能な格納室を有する蓋体とを備えた流路閉塞装置の前記蓋体を、前記残置機器ケースの接合部に直接又は連結筒を介して密封状態で取付け、前記両連結部間から仕切板弁を流路開放位置に操作したのち、前記蓋体内の閉塞手段を、残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側の流路閉塞位置に送り込んで、前記両連結部よりも上流側の流路を閉塞する。
３）前記流路閉塞装置の少なくとも閉塞手段を流路閉塞位置に残置したまま、前記残置機器ケース、及び流路閉塞装置の蓋体を含む、前記残置機器ケースの下流側に連結されたものを前記流体管部の連結部から取り外したのち、前記流体管部の連結部に開閉弁を密封状態で取付け、該開閉弁の下流側に、前記流路閉塞装置の蓋体を密封状態で取付け、前記開閉弁を開き操作して流路閉塞位置に残置されていた閉塞手段を蓋体の格納室内に格納し、前記開閉弁を閉じ操作する。その後、前記開閉弁から前記蓋体を含む流路遮断装置の残置構成部材を撤去するとともに、前記開閉弁に指定機器を密封状態で連結し、前記仕切板弁を流路閉塞後の適宜時期に撤去する。 The connecting portion of the fluid pipe portion and the connecting portion of the device provided with a plurality of device cases connected to and connected to each other in the direction of the flow axis are detachable in a sealed state with a fastener. In the fluid piping system that is tightened and connected, the fluid piping system is a method for replacing the device with a designated device in a continuous flow state that does not interrupt the flow of fluid in the pipe, and the following steps 1) to 3) are performed. It is characterized by having.
1) By loosening the fastener, a gap appears between the connecting part of the fluid pipe part and the connecting part of the equipment. Through this gap, the partition plate valve is inserted to the flow path blocking position, thereby connecting both the parts. Block the flow path between the parts.
2) Closure means capable of closing the flow path by disassembling the device leaving a remaining device case on the connecting portion side , and inserting the device into the upstream side of the flow passage blocking position by the partition plate valve through the interior of the remaining device case. When, the lid of the passage closing device provided with a lid having a storage chamber capable of storing said closure means, mounted in a sealed state via a direct or connecting tube to the joints of the leaving device case, the After the partition plate valve is operated to the flow path open position from between the two connecting portions, the closing means in the lid body is passed through the inside of the remaining device case to the flow path closed position upstream of the flow path blocking position by the partition plate valve. Then, the flow path on the upstream side of both the connecting portions is closed.
3) What is connected to the downstream side of the remaining equipment case including the remaining equipment case and the lid of the flow path closing device while leaving at least the closing means of the flow path closing device at the flow path closing position. After removing from the connecting portion of the fluid pipe portion, an on-off valve is attached in a sealed state to the connecting portion of the fluid pipe portion , and a lid body of the flow path closing device is attached in a sealed state downstream of the on-off valve, The opening / closing valve is opened to close the closing means left at the flow path closing position in the storage chamber of the lid, and the opening / closing valve is closed. Thereafter, the remaining structural member of the flow path shut-off device including the lid is removed from the on-off valve, a designated device is connected to the on- off valve in a sealed state, and the partition plate valve is appropriately timed after the flow path is closed. Remove . 流体管部の連結部とこれに連通接続され、且つ、流路軸芯方向で分離可能に連結された複数の機器ケースを備えた機器の連結部とが密封状態で脱着自在に締結具にて締付け連結されている流体配管系において、管内流体の流れを断たない不断流状態で前記機器を指定機器に取り替える流体配管系の機器交換方法であって、以下の１）〜３）のステップを備えていることを特徴とする。
１）前記締結具を緩み操作して流体管部の連結部と機器の連結部との間に隙間を現出し、この隙間を通して仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断する。
２）前記機器を、連結部側の残置機器ケースを残して分解し、該残置機器ケースの接合部に作業用開閉弁を直接又は連結筒を介して密封状態で取付け、この作業用開閉弁に、前記残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側に挿入して流路を閉塞可能な閉塞手段と、当該閉塞手段を格納可能な格納室を有する蓋体とを備えた流路閉塞装置の前記蓋体を密封状態で取付け、前記両連結部間から仕切板弁を流路開放位置に操作したのち、前記蓋体内の閉塞手段を、残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側の流路閉塞位置に送り込んで、前記両連結部よりも上流側の流路を閉塞する。
３）前記流路閉塞装置の少なくとも閉塞手段を流路閉塞位置に残置したまま、前記残置機器ケース、作業用開閉弁、及び流路閉塞装置の蓋体を含む、前記残置機器ケースの下流側に連結されたものを前記流体管部の連結部から取り外したのち、前記流体管部の連結部に開閉弁を密封状態で取付け、該開閉弁の下流側に、前記流路閉塞装置の蓋体を密封状態で取付け、前記開閉弁を開き操作して流路閉塞位置に残置されていた閉塞手段を蓋体の格納室内に格納し、前記開閉弁を閉じ操作する。その後、前記開閉弁から前記蓋体を含む流路遮断装置の残置構成部材を撤去するとともに、前記開閉弁に指定機器を密封状態で連結し、前記仕切板弁を流路閉塞後の適宜時期に撤去する。 The connecting portion of the fluid pipe portion and the connecting portion of the device provided with a plurality of device cases connected to and connected to each other in the direction of the flow axis are detachable in a sealed state with a fastener. In the fluid piping system that is tightened and connected, the fluid piping system is a method for replacing the device with a designated device in a continuous flow state that does not interrupt the flow of fluid in the pipe, and the following steps 1) to 3) are performed. It is characterized by having.
1) By loosening the fastener, a gap appears between the connecting part of the fluid pipe part and the connecting part of the equipment. Through this gap, the partition plate valve is inserted to the flow path blocking position, thereby connecting both the parts. Block the flow path between the parts.
2) The above equipment is disassembled leaving the remaining equipment case on the connecting portion side , and a work on / off valve is attached to the joined portion of the remaining equipment case in a sealed state directly or via a connecting cylinder. A closing means capable of closing the flow path by being inserted upstream of the flow path blocking position by the partition plate valve through the inside of the remaining device case, and a lid having a storage chamber capable of storing the closing means. After the lid of the flow path closing device is attached in a sealed state and the partition plate valve is operated to the flow path open position from between both the connecting portions , the closing means in the lid body is passed through the inside of the remaining device case to the partition plate. The flow is sent to the flow path blocking position upstream of the flow path blocking position by the valve, and the flow path upstream of the both connecting portions is closed.
3) On the downstream side of the remaining device case, including the remaining device case, the work on-off valve, and the cover of the flow channel closing device, with at least the closing means of the flow channel closing device remaining at the flow path closed position. After what has been connected a remove from the connecting portion of the fluid conduit section, attached off valve sealingly to the connecting portion of the fluid conduit section, downstream of the closing valve, the cover of the channel closure device Is installed in a sealed state, the opening / closing valve is opened to close the closing means left in the flow path closing position in the storage chamber of the lid, and the opening / closing valve is closed. Thereafter, the remaining structural member of the flow path shut-off device including the lid is removed from the on-off valve, a designated device is connected to the on- off valve in a sealed state, and the partition plate valve is appropriately timed after the flow path is closed. Remove . 流体管部の連結部とこれに連通接続され、且つ、流路軸芯方向で分離可能に連結された複数の機器ケースを備えた機器の連結部とが密封状態で脱着自在に締結具にて締付け連結されている流体配管系において、管内流体の流れを断たない不断流状態で前記機器を指定機器に取り替える流体配管系の機器交換方法であって、以下の１）〜３）のステップを備えていることを特徴とする。
１）前記締結具を緩み操作して流体管部の連結部と機器の連結部との間に隙間を現出し、この隙間を通して仕切板弁を流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断する。
２）前記機器を分解し、仕切板弁による流路遮断位置よりも上流側に挿入して流路を閉塞可能な閉塞手段と、当該閉塞手段を格納可能な格納室を有する蓋体とを備えた流路閉塞装置のうち、前記閉塞手段の挿入を阻害する内部構成部材を除去したのち、再び組付けた機器の連結部に、前記流路閉塞装置を直接又は連結筒を介して密封状態で取付け、前記両連結部間から仕切板弁を流路開放位置に操作し、前記蓋体内の閉塞手段を、残置機器ケースの内部を通して仕切板弁による流路遮断位置よりも上流側の流路閉塞位置に送り込んで、前記両連結部よりも上流側の流路を閉塞する。
３）前記流路閉塞装置の少なくとも閉塞手段を流路閉塞位置に残置したまま、前記機器、及び流路閉塞装置の蓋体を含む、前記残置機器ケースの下流側に連結されたものを前記流体管部の連結部から取り外したのち、前記流体管部の連結部に開閉弁を密封状態で取付け、該開閉弁の下流側に、前記流路閉塞装置の蓋体を密封状態で取付け、前記開閉弁を開き操作して流路閉塞位置に残置されていた閉塞手段を蓋体の格納室内に格納し、前記開閉弁を閉じ操作する。その後、前記開閉弁から前記蓋体を含む流路遮断装置の残置構成部材を撤去するとともに、前記開閉弁に指定機器を密封状態で連結し、前記仕切板弁を流路閉塞後の適宜時期に撤去する。 The connecting portion of the fluid pipe portion and the connecting portion of the device provided with a plurality of device cases connected to and connected to each other in the direction of the flow axis are detachable in a sealed state with a fastener. In the fluid piping system that is tightened and connected, the fluid piping system is a method for replacing the device with a designated device in a continuous flow state that does not interrupt the flow of fluid in the pipe, and the following steps 1) to 3) are performed. It is characterized by having.
1) By loosening the fastener, a gap appears between the connecting part of the fluid pipe part and the connecting part of the equipment. Through this gap, the partition plate valve is inserted to the flow path blocking position, thereby connecting both the parts. Block the flow path between the parts.
2) Disassembling the device, comprising a closing means capable of closing the flow path by being inserted upstream of the flow path blocking position by the partition plate valve, and a lid having a storage chamber capable of storing the closing means. was among the passage closing device, after removing the inner component to inhibit the insertion of the closing means, the connecting portion of the device has been assembled again, in a sealed manner directly or via coupling tube the flow obstruction device Attach and operate the partition plate valve from between the two connecting portions to the channel opening position, and block the closing means in the lid body through the inside of the remaining device case and close the channel on the upstream side of the channel blocking position by the partition plate valve. The flow path is sent to the position, and the flow path on the upstream side of the both connecting portions is closed.
3) The fluid connected to the downstream side of the remaining device case, including the device and the lid of the channel closing device, with at least the closing means of the channel closing device remaining in the channel closing position. After being removed from the connecting part of the pipe part, an on-off valve is attached in a sealed state to the connecting part of the fluid pipe part , and a lid body of the flow path closing device is attached in a sealed state downstream of the on-off valve, The closing means left open at the flow path closing position by opening the valve is stored in the storage chamber of the lid, and the opening / closing valve is closed. Thereafter, the remaining structural member of the flow path shut-off device including the lid is removed from the on-off valve, a designated device is connected to the on- off valve in a sealed state, and the partition plate valve is appropriately timed after the flow path is closed. Remove . 前記締結具の緩み操作を許容する状態で少なくとも両連結部の接合面間の外周を密封状態で囲繞可能で、かつ、流路を遮断可能な薄板状の仕切板弁が抜き差し操作自在に設けられている遮断作業ケースを装着し、この遮断作業ケースの仕切板弁を、締結具の緩み操作によって発生した両連結部間の隙間を通して流路遮断位置にまで差し入れることにより、両連結部間において流路を遮断するように構成されている請求項１〜４のいずれか１項に記載の流体配管系の機器交換方法。   A thin plate-like partition valve that can surround at least the outer periphery between the joint surfaces of both coupling portions in a sealed state and allows the flow path to be shut off in a state allowing the loosening operation of the fastener, and is provided so as to be freely inserted and removed. Is installed between the two connection parts by inserting the partition valve of the shut-off work case through the gap between the two connection parts generated by the loosening operation of the fasteners to the flow-off position. The device replacement method for a fluid piping system according to any one of claims 1 to 4, wherein the device is configured to block a flow path. 前記遮断作業ケースには、両連結部の接合面間において強制押し広げ力を付与する隙間形成手段が設けられ、当該隙間形成手段によって、締結具の緩み操作代の範囲内で両連結部間を強制的に押し広げたのち、遮断作業ケースの仕切板弁を、両連結部間の隙間を通して流路遮断位置にまで差し入れることを特徴とする請求項５記載の流体配管系の機器交換方法。 The shut-off work case is provided with a gap forming means for applying a forcible expanding force between the joint surfaces of the two connecting portions, and the gap forming means allows the gap between the connecting portions to be within the range of the loosening operation allowance of the fastener. 6. The method of replacing a fluid piping system according to claim 5, wherein the partition plate valve of the shut-off work case is inserted into the flow path shut-off position through a gap between both connecting portions after forcibly expanding. 前記連結部側に残置される機器ケースの分離接合面が前記接合部に構成されている請求項１〜３のいずれか１項に記載の流体配管系の機器交換方法。 The equipment replacement method for a fluid piping system according to any one of claims 1 to 3 , wherein a separation joint surface of the equipment case left on the connection part side is formed in the joint part.
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