JP2014109325A - Branch pipe part removal device and removal method - Google Patents

Branch pipe part removal device and removal method Download PDF

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JP2014109325A
JP2014109325A JP2012264181A JP2012264181A JP2014109325A JP 2014109325 A JP2014109325 A JP 2014109325A JP 2012264181 A JP2012264181 A JP 2012264181A JP 2012264181 A JP2012264181 A JP 2012264181A JP 2014109325 A JP2014109325 A JP 2014109325A
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branch pipe
valve
pipe
fluid pipe
pipe part
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JP6234671B2 (en
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Yoshinori Maeda
芳則 前田
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Cosmo Koki Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a branched pipe part removal device and its removal method in which a sealing characteristic can be assured without utilizing an already installed flange part of a branch pipe part branched from an already installed fluid pipe and the branched pipe part can be removed from the already installed fluid pipe under non-cut flow state.SOLUTION: This invention relates to a branched pipe part removal device 43 in which a blocking member 19 for blocking a flow passage between an already installed fluid pipe part 1 and a branched pipe part 2 is inserted into the branched pipe part 2 branched from the already installed fluid pipe 1 and having a valve 16 fixed thereto, the branched pipe part 2 is removed from the already installed fluid pipe part 1 blocked by the blocking member 19 under non-cut flow state through utilization of opening or closing of the valve 16. This removal device comprises insertion means 58 for inserting the blocking member 19 through a cutting part 21 of the left branched pipe part 2 under a state in which the valve 16 is blocked, the branched pipe part 2 is cut off from the valve 16 leaving the already installed fluid pipe side; holding part 59 for sealingly holding the insertion means 58 from outside the branched pipe part 2 operatively; and fixing part 60 for sealingly fixing the holding part 59 to the cutting part 21.

Description

本発明は、既設流体管から分岐され、バルブが取り付けられた分岐管部に、前記既設流体管と前記分岐管部との流路を閉塞する閉塞部材を挿入して、前記バルブの開閉を利用し、前記閉塞部材で閉塞された前記既設流体管から前記分岐管部を不断流状態で撤去する分岐管部撤去装置及びその方法に関する。   The present invention utilizes the opening and closing of the valve by inserting a closing member that closes the flow path between the existing fluid pipe and the branch pipe section into a branch pipe section branched from the existing fluid pipe and to which a valve is attached. In addition, the present invention relates to a branch pipe part removing device and method for removing the branch pipe part from the existing fluid pipe closed by the closing member in an uninterrupted state.

従来、水道本管等（既設流体管）では、その途中で分岐されて分岐管や仕切弁等が接続される。この分岐管や仕切弁等が耐久年数に至ったり、新たな道路が敷設されるなどで配管系が変更されたりする場合には、分岐管や仕切弁等を撤去することがある。   Conventionally, in a water main or the like (existing fluid pipe), a branch pipe, a gate valve or the like is connected by branching on the way. When this branch pipe, gate valve or the like reaches the end of life or when the piping system is changed due to a new road being laid, the branch pipe or gate valve may be removed.

ところで、近年の水道管等の配管工事では、流体管の管路を上流側で遮断することなく管路内の流体の流れを維持した状態（不断流状態）で、分岐管や仕切弁等を設置または除去する不断流工法が採用されている。   By the way, in plumbing work such as water pipes in recent years, branch pipes, gate valves, etc. are installed in a state in which the flow of fluid in the pipe is maintained without being interrupted upstream (discontinuous flow). A constant flow method of installation or removal is adopted.

既設流体管から分岐された分岐管部に取り付けられた既設仕切弁を不断流状態で取り外する方法として、既設仕切弁を全閉させた状態で、既設流体管側に既設仕切弁を残して既設仕切弁から下流側の配管を取り外することで開放された既設仕切弁のフランジ部に、撤去装置の仮止めフランジ板を固定したうえで、既設仕切弁を全開にして、分岐管部を止水可能な止水部材（閉塞部材）を挿入手段で既設流体管側の分岐管部に挿入し、分岐管部を止水した状態で、既設仕切弁を分岐管部から取り外すものが知られている（例えば、特許文献１から３参照）。   As a method of removing the existing gate valve attached to the branch pipe part branched from the existing fluid pipe in an uninterrupted state, the existing gate valve is fully closed and the existing gate valve is left on the existing fluid pipe side. The temporary stopper flange plate of the removal device is fixed to the flange part of the existing gate valve that has been opened by removing the downstream pipe from the gate valve, the existing gate valve is fully opened, and the branch pipe part is stopped. It is known that a possible water stop member (blocking member) is inserted into the branch pipe part on the existing fluid pipe side by an insertion means, and the existing gate valve is removed from the branch pipe part with the branch pipe part still watered. (For example, see Patent Documents 1 to 3).

特許第４６１８９３１号公報（第５頁、第５図）Japanese Patent No. 4618931 (page 5, FIG. 5) 特許第４５６３０５８号公報（第７頁、第９図）Japanese Patent No. 4563058 (page 7, FIG. 9) 特許第３１９１１０３号公報（第４頁、第７図）Japanese Patent No. 3191103 (page 4, FIG. 7)

特許文献１から３にあっては、既設仕切弁のフランジ部を利用して、止水部材（閉塞部材）を挿入する挿入手段を固定するようにしているが、既設仕切弁のフランジ部に取り付けられているパッキン部材は経年変化で傷んでいることがあり、フランジ部での密封性が十分に確保されない虞がある。また、フランジ部の形状は、既設流体管の配管径に応じて複数存在するため、既設フランジ部に適した工具を用意する必要があり、既設フランジ部を利用すると作業性が低下する虞がある。   In Patent Documents 1 to 3, the flange portion of the existing gate valve is used to fix the insertion means for inserting the water stop member (blocking member), but it is attached to the flange portion of the existing gate valve. The packing member currently used may be damaged due to secular change, and there is a possibility that the sealing performance at the flange portion is not sufficiently ensured. In addition, since there are a plurality of flange portions depending on the pipe diameter of the existing fluid pipe, it is necessary to prepare a tool suitable for the existing flange portion. If the existing flange portion is used, workability may be reduced. .

本発明は、このような問題点に着目してなされたもので、既設流体管から分岐された分岐管部の既設フランジ部を利用することなく密封性を確保して、既設流体管から分岐管部を不断流状態で撤去することのできる分岐管部撤去装置及びその方法を提供することを目的とする。   The present invention has been made paying attention to such a problem, and ensures sealing without using an existing flange portion of a branch pipe portion branched from an existing fluid pipe, and the branch pipe from the existing fluid pipe. It is an object of the present invention to provide a branch pipe part removing device and method for removing a part in a continuous flow state.

前記課題を解決するために、本発明の分岐管部撤去装置は、
既設流体管から分岐され、バルブが取り付けられた分岐管部に、前記既設流体管と前記分岐管部との流路を閉塞する閉塞部材を挿入して、前記バルブの開閉を利用し、前記閉塞部材で閉塞された前記既設流体管から前記分岐管部を不断流状態で撤去する分岐管部撤去装置であって、
前記バルブが閉塞された状態で、該バルブから前記既設流体管側を残して前記分岐管部が切断され、残された前記分岐管部の切断部を通して前記閉塞部材を挿入する挿入手段と、該挿入手段を前記分岐管部の外側から操作可能に密封状に保持する保持部と、該保持部を前記切断部に密封状に固定する固定部とを備えることを特徴としている。
この特徴によれば、既設流体管から分岐された分岐管部に取り付けられたバルブを閉塞して、バルブから既設流体管側を残して分岐管部が切断され、残された分岐管部の切断部を通して分岐管部内に閉塞部材を配置するとともに、閉塞部材の挿入手段を密封状に保持させた保持部を切断部に密封状に固定部で固定することで、分岐管部の既設フランジ部を利用することなく密封性を確保して、既設流体管から分岐管部を不断流状態で撤去することがきる。 In order to solve the above problems, the branch pipe part removing device of the present invention is:
A blocking member that closes the flow path between the existing fluid pipe and the branch pipe section is inserted into a branch pipe section that is branched from the existing fluid pipe and to which the valve is attached. A branch pipe part removing device that removes the branch pipe part from the existing fluid pipe closed by a member in an uninterrupted flow state,
An insertion means for cutting the branch pipe part from the valve while leaving the existing fluid pipe side and inserting the closing member through the remaining cut part of the branch pipe part in a state where the valve is closed; A holding part that holds the insertion means in a sealed manner so as to be operable from the outside of the branch pipe part, and a fixing part that fixes the holding part to the cutting part in a sealing manner are provided.
According to this feature, the valve attached to the branch pipe part branched from the existing fluid pipe is closed, the branch pipe part is cut leaving the existing fluid pipe side from the valve, and the remaining branch pipe part is cut. The closure member is disposed in the branch pipe portion through the portion, and the holding portion that holds the insertion means of the closure member in a sealed state is fixed to the cutting portion with the fixing portion in a sealing manner, whereby the existing flange portion of the branch pipe portion is fixed. It is possible to remove the branch pipe portion from the existing fluid pipe in an uninterrupted state while ensuring sealing without using it.

本発明の分岐管部撤去装置は、
前記保持部が、一端が前記挿入手段を前記分岐管部の外側から操作可能に密封状に保持し、他端が受口部として形成された受口管であることを特徴としている。
この特徴によれば、一端が挿入手段を密封状に保持する受口管の受口部が、残された分岐管部の切断部に嵌入されることで、分岐管部の切断部に挿入手段を密封状に保持することができる。 The branch pipe part removing device of the present invention is
One end of the holding portion is a receiving tube formed so that one end holds the insertion means in a sealed manner so as to be operable from the outside of the branch tube portion, and the other end is formed as a receiving portion.
According to this feature, the receiving portion of the receiving tube whose one end holds the insertion means in a sealed state is fitted into the remaining cut portion of the branch pipe portion, so that the insertion means is inserted into the cut portion of the branch pipe portion. Can be kept sealed.

本発明の分岐管部撤去装置は、
前記固定部が、残された前記分岐管部の切断部の外周面に食い込む爪部と、前記受口管に接続されるフランジ部と、前記受口管の内部に設けられた弾性体からなる密封部材を押圧する押圧部とを有する押輪であることを特徴としている。
この特徴によれば、爪部を切断部に食い込ませた押輪のフランジ部と受口管とが接続されることで、押圧部が密封部材を押圧して受口管の内周面と切断部の外周面とに密着させることになるので、受口管を切断部の外周面に密封状に固定することができる。 The branch pipe part removing device of the present invention is
The fixing portion is composed of a claw portion that bites into the outer peripheral surface of the remaining cut portion of the branch pipe portion, a flange portion connected to the receiving pipe, and an elastic body provided inside the receiving pipe. It is a press ring which has a press part which presses a sealing member.
According to this feature, the flange part of the press ring with the claw part biting into the cutting part and the receiving pipe are connected, so that the pressing part presses the sealing member and the inner peripheral surface of the receiving pipe and the cutting part Therefore, the receiving tube can be fixed in a sealed manner to the outer peripheral surface of the cutting portion.

本発明の分岐管部撤去方法は、
既設流体管から分岐され、バルブが取り付けられた分岐管部に、前記既設流体管と前記分岐管部との流路を閉塞する閉塞部材を挿入して、前記バルブの開閉を利用し、前記閉塞部材で閉塞された前記既設流体管から前記分岐管部を不断流状態で撤去する分岐管部撤去方法であって、
前記バルブを閉塞した状態で、該バルブから前記既設流体管側を残して前記分岐管部を切断して撤去し、
残された前記分岐管部の切断部に、前記バルブを閉塞した状態で、前記閉塞部材と該閉塞部材を挿入する挿入手段とを前記分岐管部の外側からの操作で前記分岐管部の管軸方向に進退移動可能に密封状に設置し、
前記バルブを開放した後に、前記挿入手段により前記既設流体管内に前記閉塞部材を挿入して、前記既設流体管を閉塞した状態で、残された前記分岐管部を前記既設流体管から撤去することを特徴としている。
この特徴によれば、既設流体管から分岐された分岐管部のバルブを閉塞した閉塞状態で、バルブから既設流体管側を残すように分岐管部を切断し、残された分岐管部の切断部に、閉塞部材と該閉塞部材を挿入する挿入手段とを分岐管部の外側からの操作で分岐管部の管軸方向に進退移動可能に密封状に設置することで、分岐管部の既設フランジ部を利用することなく密封性を確保して、既設流体管から分岐管部を不断流状態で撤去することがきる。 The branch pipe part removing method of the present invention is:
A blocking member that closes the flow path between the existing fluid pipe and the branch pipe section is inserted into a branch pipe section that is branched from the existing fluid pipe and to which the valve is attached. A branch pipe part removal method for removing the branch pipe part in an uninterrupted state from the existing fluid pipe blocked by a member,
With the valve closed, the branch pipe part is cut off and removed from the valve, leaving the existing fluid pipe side,
In the state where the valve is closed in the remaining cut portion of the branch pipe portion, the closing member and the insertion means for inserting the closing member are operated from the outside of the branch pipe portion by the operation from the outside of the branch pipe portion. Installed in a sealed manner so that it can move back and forth in the axial direction,
After the valve is opened, the closing member is inserted into the existing fluid pipe by the insertion means, and the remaining branch pipe portion is removed from the existing fluid pipe in a state where the existing fluid pipe is closed. It is characterized by.
According to this feature, in the closed state in which the valve of the branch pipe portion branched from the existing fluid pipe is closed, the branch pipe portion is cut so as to leave the existing fluid pipe side from the valve, and the remaining branch pipe portion is cut. By installing the closing member and the insertion means for inserting the closing member into the portion in a sealed manner so as to be movable back and forth in the tube axis direction of the branch pipe portion by operation from the outside of the branch pipe portion, It is possible to remove the branch pipe part from the existing fluid pipe in an uninterrupted state while securing the sealing performance without using the flange part.

本発明の分岐管部撤去方法は、
前記バルブが、分割構造を有する筐体を前記分岐管部の所定位置の外周面に密封状に取り付けられ、該筐体内の前記分岐管部が不断流状態で穿孔されて形成された孔部に挿入された弁体を備え、前記バルブを前記分岐管部に取り付けた後に、該バルブから前記既設流体管側を残して前記分岐管部を切断して撤去することを特徴としている。
この特徴によれば、分岐管部の所定位置に筐体を密封状に取り付けて、弁体を挿入するための孔部を形成することで、分岐管部の所定位置にバルブを取り付けて、このバルブから既設流体管側を残して分岐管部を切断するので、分岐管部が切断される切断位置と閉塞部材で閉塞される閉塞位置との離間距離を所定長さに短縮して、分岐管部の撤去工事をより簡便にできる。 The branch pipe part removing method of the present invention is:
In the hole formed by the valve, a housing having a divided structure is attached to the outer peripheral surface of the branch pipe portion at a predetermined position in a sealed manner, and the branch pipe portion in the housing is perforated in an uninterrupted state. An inserted valve body is provided, and after the valve is attached to the branch pipe part, the branch pipe part is cut and removed from the valve while leaving the existing fluid pipe side.
According to this feature, the housing is sealed in a predetermined position of the branch pipe portion, and a hole for inserting the valve body is formed, so that the valve is attached to the predetermined position of the branch pipe portion. Since the branch pipe part is cut from the valve while leaving the existing fluid pipe side, the separation distance between the cutting position where the branch pipe part is cut and the closed position where it is closed by the closing member is shortened to a predetermined length. The removal work of the part can be made simpler.

実施例における流体管から分岐された分岐管部を示す上面図である。It is a top view which shows the branch pipe part branched from the fluid pipe | tube in an Example. 穿孔装置が装着され穿孔の形成された分岐管を示す側面一部断面図である。It is side surface partial sectional drawing which shows the branch pipe with which the piercing | piercing apparatus was mounted | worn and in which the piercing | piercing was formed. プラグ弁が取り付けられた分岐管を示す側面一部断面図である。It is side surface partial sectional drawing which shows the branch pipe to which the plug valve was attached. プラグ弁が取り付けられた分岐管を示す上面図である。It is a top view which shows the branch pipe to which the plug valve was attached. 閉塞駒の挿入装置が取り付けられた分岐管を示す側断面図である。It is a sectional side view which shows the branch pipe to which the insertion apparatus of the obstruction | occlusion piece was attached. （ａ）は、自然状態の閉塞駒を示す側断面図であり、（ｂ）は、拡径された状態の閉塞駒を示す側断面図である。(A) is a side sectional view showing a closing piece in a natural state, and (b) is a side sectional view showing the closing piece in an expanded state. 閉塞駒の接続された挿入装置本体を示す側断面図である。It is a sectional side view which shows the insertion apparatus main body to which the closing piece was connected. 挿入装置により閉塞駒が流体管に挿入された分岐管部を示す側断面図である。It is a sectional side view which shows the branch pipe part by which the closing piece was inserted in the fluid pipe | tube by the insertion apparatus. 流体管が閉塞駒で閉塞された状態で分岐管が取り外された流体管を示す側断面図である。It is a sectional side view which shows the fluid pipe | tube from which the branch pipe was removed in the state with which the fluid pipe | tube was obstruct | occluded with the closing piece. 仮押輪の取り付けられた流体管を示す図である。It is a figure which shows the fluid pipe | tube with which the temporary press ring was attached. 流体管に取り付けられる押付押輪を示す図である。It is a figure which shows the pressing push ring attached to a fluid pipe | tube. 押付押輪及び閉塞蓋が取り付けられた流体管を示す図である。It is a figure which shows the fluid pipe | tube with which the pressing ring and the obstruction | occlusion lid were attached.

本発明に係る分岐管部撤去装置及びその方法を実施するための形態を実施例に基づいて以下に説明する。   EMBODIMENT OF THE INVENTION The form for implementing the branch pipe part removal apparatus and its method which concern on this invention is demonstrated below based on an Example.

実施例に係る分岐管部撤去装置及びその方法につき、図１から図１２を参照して説明する。以下、図１の紙面下側を分岐管部撤去装置の前方側として説明する。図１に示すように、本実施例の既設流体管である流体管１は、例えば、地中に埋設される上水道用のダクタイル鋳鉄製であり、断面視略円形状に形成され、内周面がモルタル層で被覆されている。尚、本発明に係る流体管は、その他鋳鉄、鋼等の金属製、あるいは石綿、コンクリート製、塩化ビニール、ポリエチレン若しくはポリオレフィン製等であってもよい。更に尚、流体管の内周面はモルタル層に限らず、例えばエポキシ樹脂等により被覆されてもよく、若しくは適宜の材料を粉体塗装により流体管の内周面に被覆してもよい。また、本実施例では流体管内の流体は上水であるが、本実施例の上水に限らず、例えば工業用水や農業用水、下水等の他、ガスやガスと液体との気液混合体であっても構わない。   The branch pipe part removing apparatus and method according to the embodiment will be described with reference to FIGS. Hereinafter, the lower side of the sheet of FIG. 1 will be described as the front side of the branch pipe part removing device. As shown in FIG. 1, a fluid pipe 1 that is an existing fluid pipe of the present embodiment is made of, for example, ductile cast iron for waterworks buried in the ground, and is formed in a substantially circular shape in cross section, and has an inner peripheral surface. Is covered with a mortar layer. The fluid pipe according to the present invention may be made of other metals such as cast iron and steel, or made of asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. In this embodiment, the fluid in the fluid pipe is clean water, but is not limited to clean water in this embodiment. For example, in addition to industrial water, agricultural water, sewage, etc., gas or gas-liquid mixture of gas and liquid It does not matter.

図１に示すように、流体管１には、流体管１から分岐された分岐管部２が接続されている。この流体管１の側部には、流体管１の管軸に対して略垂直方向に突出され流体管１の管路に連通する管路を有する受口部３が設けられている。そして、この受口部３には、受口部３に挿入される挿口部４が設けられた分岐管５が接続されている。分岐管５の図示しない下流側には、更に配管部材が接続されて末端部が閉塞栓（図示略）で密封状に閉塞されている。本実施例における分岐管部２は、これら分岐管５及び配管部材と閉塞栓により構成される。   As shown in FIG. 1, a branch pipe portion 2 branched from the fluid pipe 1 is connected to the fluid pipe 1. At the side of the fluid pipe 1, there is provided a receiving portion 3 having a conduit that projects in a direction substantially perpendicular to the tube axis of the fluid pipe 1 and communicates with the conduit of the fluid pipe 1. A branch pipe 5 provided with an insertion portion 4 to be inserted into the receiving portion 3 is connected to the receiving portion 3. A pipe member is further connected to the downstream side of the branch pipe 5 (not shown), and the end portion is sealed in a sealing manner with a closing plug (not shown). The branch pipe portion 2 in the present embodiment is constituted by the branch pipe 5, the piping member, and the blocking plug.

流体管１の受口部３の内周面には、図２に示すように、開口端側がテーパ状に拡径する環状溝６が形成され、この環状溝６には、環状溝６の内壁に沿うリング状に形成された硬質ゴムによるパッキン７が圧入されている。また、受口部３の外周面には、管軸方向にボルト８を挿入可能なボルト孔が周方向に複数形成されたフランジ部９が形成されている。   As shown in FIG. 2, an annular groove 6 whose opening end side is enlarged in a tapered shape is formed on the inner peripheral surface of the receiving portion 3 of the fluid pipe 1, and the inner wall of the annular groove 6 is formed in the annular groove 6. Packing 7 made of hard rubber formed in a ring shape along is press-fitted. Further, on the outer peripheral surface of the receiving portion 3, a flange portion 9 is formed in which a plurality of bolt holes into which the bolts 8 can be inserted in the tube axis direction are formed in the circumferential direction.

また、分岐管５の挿口部４の外周には、挿口部４を受口部３に密封状に固定するための環状の押輪１０が取り付けられている。この押輪１０は、受口部３のパッキン７に当接される環状の押圧部１１と、ボルト８を挿入可能なボルト孔を周方向に有する環状のフランジ部１２とから成る。そして、押輪１０は、分岐管５の挿口部４に若干の遊びを持たせて外嵌されて、押輪１０のフランジ部１２と受口部３のフランジ部９とが複数のボルト・ナット８により締結されることにより、押圧部１１によりパッキン７が押圧されて受口部３及び挿口部４に密着されて、挿口部４と受口部３とが密封状に固定されるようになっている。   In addition, an annular push ring 10 for fixing the insertion portion 4 to the receiving portion 3 in a sealing manner is attached to the outer periphery of the insertion portion 4 of the branch pipe 5. The press ring 10 includes an annular pressing portion 11 that is in contact with the packing 7 of the receiving portion 3 and an annular flange portion 12 that has a bolt hole into which the bolt 8 can be inserted in the circumferential direction. The pusher wheel 10 is externally fitted to the insertion portion 4 of the branch pipe 5 with some play, and the flange portion 12 of the pusher wheel 10 and the flange portion 9 of the receiving portion 3 have a plurality of bolts and nuts 8. As a result of the fastening, the packing 7 is pressed by the pressing part 11 and is brought into close contact with the receiving part 3 and the insertion part 4 so that the insertion part 4 and the receiving part 3 are fixed in a sealed manner. It has become.

本実施例の分岐管撤去方法では、先ず、図２に示すように、分岐管５における挿口部４寄に、流体管１の受口部３から分岐管５の挿口部４が離脱するのを防止するために、周方向に二分割された離脱防止押輪１３を取り付ける。この離脱防止押輪１３は、分岐管５の外周面に食い込む爪部１４と、受口部３のフランジ部９とボルト・ナット８で接続されるフランジ部１５とを有している。離脱防止押輪１３の爪部１４が分岐管５の外周面に食い込まれており、挿口部４の外周面に爪部１４が食い込んで固定された状態の離脱防止押輪１３のフランジ部１５と、受口部３のフランジ部９とが、押輪１０を介してボルト・ナット８で締結されることで、流体管１内の流体の圧力によって分岐管５を動かそうとする不平均力が働く場合でも、流体管１から分岐管部２が抜けてしまうことが防止される。   In the branch pipe removing method of the present embodiment, first, as shown in FIG. 2, the insertion portion 4 of the branch pipe 5 is detached from the inlet portion 3 of the fluid pipe 1 toward the insertion portion 4 of the branch pipe 5. In order to prevent this, the separation preventing pusher 13 divided into two in the circumferential direction is attached. The separation preventing pusher wheel 13 has a claw portion 14 that bites into the outer peripheral surface of the branch pipe 5, and a flange portion 15 that is connected to the flange portion 9 of the receiving portion 3 by bolts and nuts 8. The claw portion 14 of the separation preventing push ring 13 is bitten into the outer peripheral surface of the branch pipe 5, and the flange portion 15 of the separation preventing push ring 13 in a state where the claw portion 14 bites into the outer circumferential surface of the insertion portion 4 is fixed. When the flange portion 9 of the receiving portion 3 is fastened with the bolt and nut 8 via the push wheel 10, an unbalanced force that tries to move the branch pipe 5 by the pressure of the fluid in the fluid pipe 1 works. However, the branch pipe portion 2 is prevented from coming off from the fluid pipe 1.

そして、離脱防止押輪１３を分岐管５に取り付けた後には、分岐管５に本発明に係るバルブとしてのプラグ弁１６を取り付ける（図３参照）。このプラグ弁１６は、分岐管５の外周に設けられた本発明に係る孔部としての穿孔Ｑから挿入され、分岐管５の管路を閉塞可能な弁体１８を有している。   Then, after attaching the separation preventing pusher 13 to the branch pipe 5, a plug valve 16 as a valve according to the present invention is attached to the branch pipe 5 (see FIG. 3). The plug valve 16 has a valve body 18 that is inserted from a perforation Q as a hole portion according to the present invention provided on the outer periphery of the branch pipe 5 and can close the pipe line of the branch pipe 5.

プラグ弁１６を取り付ける際には、先ず、分岐管５の外周面を密封状に覆うケース体１７を分岐管５の所定位置に装着する。この所定位置は、後述する本発明に係る閉塞部材としての閉塞駒１９の挿入装置本体５８（図５参照）の長さに応じて定められ、後述する分岐管５の切断部２１と流体管１の接続部２２との距離が、挿入装置本体５８の長さ以下になるように設定される。これにより、後述する分岐管５が切断される切断位置と閉塞駒１９で閉塞される閉塞位置との離間距離を所定長さに短縮して、分岐管５の撤去工事を簡便にできる。   When attaching the plug valve 16, first, a case body 17 that covers the outer peripheral surface of the branch pipe 5 in a sealing manner is attached to a predetermined position of the branch pipe 5. This predetermined position is determined according to the length of the insertion device main body 58 (see FIG. 5) of the closing piece 19 as a closing member according to the present invention, which will be described later, and the cutting portion 21 of the branch pipe 5 and the fluid pipe 1 described later. The distance from the connecting portion 22 is set to be equal to or shorter than the length of the insertion device main body 58. Thereby, the separation distance of the cutting | disconnection position where the branch pipe 5 mentioned later is cut | disconnected, and the obstruction | occlusion position obstruct | occluded with the block 19 is shortened to predetermined length, and the removal work of the branch pipe 5 can be simplified.

ケース体１７は、いわゆる割Ｔ字管であって、分岐管５の外周の上側を覆うとともに分岐管５側に連通し、分岐管５の管軸と略直交して分岐管５から突出する方向に延びる管状の接続管部２３を有する上部ケース部材２４と、分岐管５の外周の下側を覆う下部ケース部材２５とからなる。上下のケース部材２４、２５間にシール材（図示略）が介されて、上部ケース部材２４と下部ケース部材２５とが分岐管５を挟み対向されるとともに、分岐管５の管軸方向に沿って配置された複数のボルト・ナット２６により締結されることで、分岐管５が密封状に覆われる。   The case body 17 is a so-called split T-shaped tube, covers the upper side of the outer periphery of the branch pipe 5, communicates with the branch pipe 5, and protrudes from the branch pipe 5 substantially perpendicular to the tube axis of the branch pipe 5. An upper case member 24 having a tubular connecting pipe portion 23 extending in the direction of the upper end of the branch pipe 5 and a lower case member 25 covering the lower side of the outer periphery of the branch pipe 5. A sealant (not shown) is interposed between the upper and lower case members 24 and 25 so that the upper case member 24 and the lower case member 25 are opposed to each other with the branch pipe 5 interposed therebetween, and along the tube axis direction of the branch pipe 5. The branch pipe 5 is covered in a sealed manner by being fastened by a plurality of bolts and nuts 26 arranged in this manner.

なお、上部ケース部材２４の内周面と分岐管５の外周面との間には、後述する穿孔Ｑの外周に沿うようにゴムリング２７が介設される。このゴムリング２７によって、穿孔Ｑを介し流体管１から流体の漏洩が生じることが防止される。更に尚、流体管１にケース体１７を取り付けた後に、ケース体１７内に流体圧を加えて、ケース体１７の密封性を適宜確認してもよい。   A rubber ring 27 is interposed between the inner peripheral surface of the upper case member 24 and the outer peripheral surface of the branch pipe 5 so as to be along the outer periphery of a perforation Q described later. The rubber ring 27 prevents fluid from leaking from the fluid pipe 1 through the perforations Q. Furthermore, after attaching the case body 17 to the fluid pipe 1, fluid pressure may be applied in the case body 17 to check the sealing performance of the case body 17 as appropriate.

次に、図２に示すように、上部ケース部材２４の接続管部２３に、内部空間を密封状に閉塞する作業弁２８及び分岐管５に穿孔を形成する穿孔装置２９を備えた作業用ケース３０を密封状に接続する。穿孔装置２９は、図示しない駆動手段に接続され、作業用ケース３０内及び接続管部２３内を接続管部２３の管軸方向に進退移動されるとともに進退軸線周りに回転される軸部材３１と、この軸部材３１の先端部に固定され鋭利な穿孔刃を備えたカッター部材３２とから構成される。   Next, as shown in FIG. 2, a working case provided with a working valve 28 that seals the internal space in a sealing manner in the connecting pipe portion 23 of the upper case member 24 and a punching device 29 that forms a punch in the branch pipe 5. 30 is connected in a sealed manner. The drilling device 29 is connected to a driving means (not shown), and is moved forward and backward in the tube axis direction of the connection pipe portion 23 in the work case 30 and the connection pipe portion 23 and rotated around the forward and backward axis line. The cutter member 32 is fixed to the tip of the shaft member 31 and has a sharp perforating blade.

そして、作業用ケース３０の作業弁２８を開放した状態で、カッター部材３２を軸部材３１を介して進退軸線周りに回転させつつ分岐管５側に進行させて、分岐管５の外周壁に当接させてカッター部材３２で穿孔し、分岐管５に穿孔Ｑを形成する。その後、穿孔Ｑの形成により分岐管５から分断された切片と共に、カッター部材３２を作業弁２８よりも駆動手段側に退避させたうえで、作業弁２８により作業用ケース３０内を密封状に閉塞する。作業弁２８が閉塞された状態で、穿孔装置２９を作業用ケース３０から取り出す。   Then, with the work valve 28 of the work case 30 opened, the cutter member 32 is advanced to the branch pipe 5 side while rotating about the advance / retreat axis via the shaft member 31, so that it contacts the outer peripheral wall of the branch pipe 5. In contact with the cutter member 32, a perforation Q is formed in the branch pipe 5. After that, the cutter member 32 is retracted to the driving means side from the work valve 28 together with the section cut off from the branch pipe 5 by the formation of the perforation Q, and the work case 30 is hermetically sealed by the work valve 28. To do. With the work valve 28 closed, the punching device 29 is taken out from the work case 30.

次いで、図３に示すように、作業用ケース３０内に挿入されて接続管部２３の管軸方向に進退移動可能なアーム３３と、このアーム３３の先端部に接続された、弁体１８や回転ネジ部３４を弁筐体３５内に配置して予め組み立てられたプラグ弁１６とを作業用ケース３０内に配置して、作業用ケース３０を密封状態にする。尚、アーム３３は筒状に形成されており、プラグ弁１６の回転ネジ部３４を弁筐体３５の外側から操作するための操作部３６が、アーム３３の内部に挿通配置されている。   Next, as shown in FIG. 3, an arm 33 that is inserted into the work case 30 and can move forward and backward in the tube axis direction of the connection pipe portion 23, and the valve body 18 connected to the tip of the arm 33, The rotary screw portion 34 is arranged in the valve housing 35 and the plug valve 16 assembled in advance is arranged in the working case 30 so that the working case 30 is sealed. The arm 33 is formed in a cylindrical shape, and an operation portion 36 for operating the rotary screw portion 34 of the plug valve 16 from the outside of the valve housing 35 is inserted and arranged inside the arm 33.

作業用ケース３０を密封状態にした後は、作業用ケース３０内の空気を外部に排出するための空気弁（図示略）を開放するとともに作業弁２８を開放状態にして、作業用ケース３０内を分岐管５内の流体で満たす。その後、空気弁を閉塞して、アーム３３を分岐管５側に進出させて、プラグ弁１６を上部ケース部材２４の接続管部２３に嵌め込む。このプラグ弁１６の弁筐体３５の外径は、接続管部２３の開口部の内径より小径に形成されており、弁筐体３５において接続管部２３に嵌め込まれる嵌入部３７には、その外周面に沿ってＯリング３８が設けられている。このＯリング３８により、弁筐体３５が上部ケース部材２４に密封状に取り付け可能になる。   After the working case 30 is sealed, an air valve (not shown) for discharging the air in the working case 30 to the outside is opened, and the working valve 28 is opened to bring the working case 30 into the working case 30. Is filled with the fluid in the branch pipe 5. Thereafter, the air valve is closed, the arm 33 is advanced to the branch pipe 5 side, and the plug valve 16 is fitted into the connecting pipe portion 23 of the upper case member 24. The outer diameter of the valve housing 35 of the plug valve 16 is formed to be smaller than the inner diameter of the opening of the connection pipe portion 23, and the fitting portion 37 fitted into the connection pipe portion 23 in the valve housing 35 has An O-ring 38 is provided along the outer peripheral surface. The O-ring 38 allows the valve housing 35 to be attached to the upper case member 24 in a sealed manner.

そして、上部ケース部材２４の接続管部２３に設けられた固定ボルト（図示略）を接続管部２３の内周方向に螺挿して、弁筐体３５の外周壁に当接させ、プラグ弁１６を上部ケース部材２４に固定する。その後、作業用ケース３０の側面の窓蓋３９を取り外し、開放された開口を介して、プラグ弁１６とアーム３３とを接続する接続具（図示略）を取り外す。そして、プラグ弁１６とアーム３３とを離間させるとともに、作業用ケース３０を上部ケース部材２４から取り外す。   Then, a fixing bolt (not shown) provided in the connecting pipe portion 23 of the upper case member 24 is screwed in the inner peripheral direction of the connecting pipe portion 23 and brought into contact with the outer peripheral wall of the valve housing 35, so that the plug valve 16. Is fixed to the upper case member 24. Thereafter, the window lid 39 on the side surface of the working case 30 is removed, and a connector (not shown) for connecting the plug valve 16 and the arm 33 is removed through the opened opening. Then, the plug valve 16 and the arm 33 are separated from each other, and the working case 30 is removed from the upper case member 24.

また、リング状のフランジ部材４０をプラグ弁１６の上方から嵌入して、上部ケース部材２４にボルト・ナットで締結する（図５参照）。弁筐体３５の嵌入部３７が、上部ケース部材２４とフランジ部材４０とで挟まれることで、プラグ弁１６が上部ケース部材２４に固定される。以上により、分岐管５へのプラグ弁１６の取り付け作業が完了する。   Further, the ring-shaped flange member 40 is fitted from above the plug valve 16 and fastened to the upper case member 24 with bolts and nuts (see FIG. 5). The plug valve 16 is fixed to the upper case member 24 by the fitting portion 37 of the valve housing 35 being sandwiched between the upper case member 24 and the flange member 40. Thus, the operation for attaching the plug valve 16 to the branch pipe 5 is completed.

次いで、図３の点線で示すように、分岐管５に取り付けられたプラグ弁１６の操作部３６を回転操作し、回転ネジ部３４を介して弁体１８を分岐管５の管路に移動させて、分岐管５の管路を閉塞する。そして、分岐管５の下流側の末端の閉塞栓を取り外して、プラグ弁１６より下流側の分岐管５内の流体を排出するとともに、プラグ弁１６により分岐管５が遮断されたことを確認する。   Next, as shown by a dotted line in FIG. 3, the operation part 36 of the plug valve 16 attached to the branch pipe 5 is rotated, and the valve body 18 is moved to the pipe line of the branch pipe 5 via the rotary screw part 34. Then, the pipe line of the branch pipe 5 is closed. Then, the closing plug at the downstream end of the branch pipe 5 is removed, the fluid in the branch pipe 5 downstream from the plug valve 16 is discharged, and it is confirmed that the branch pipe 5 is blocked by the plug valve 16. .

そして、プラグ弁１６を閉塞した状態で、プラグ弁１６から流体管１側を残すように、上部ケース部材２４より下流側に所定距離離間された所定位置Ａで分岐管５を切断して撤去する（図４参照）。尚、分岐管５の切断には、図示しないエンジンによって円盤状のカッターが回転されるエンジンカッター（図示略）等を用いることができる。また、所定距離Ａは、後述する短管４１の受口長さや、離脱防止押輪４２の管軸方向厚み、閉塞駒１９を挿入する挿入装置本体５８の長さ、分岐管５の管径等に応じて適宜定められる。   Then, with the plug valve 16 closed, the branch pipe 5 is cut and removed at a predetermined position A spaced a predetermined distance downstream from the upper case member 24 so as to leave the fluid pipe 1 side from the plug valve 16. (See FIG. 4). For cutting the branch pipe 5, an engine cutter (not shown) or the like in which a disk-shaped cutter is rotated by an engine (not shown) can be used. Further, the predetermined distance A depends on the receiving length of the short pipe 41 to be described later, the thickness in the pipe axis direction of the separation preventing push ring 42, the length of the insertion device main body 58 into which the closing piece 19 is inserted, the pipe diameter of the branch pipe 5, and the like. It is determined accordingly.

次いで、図５に示すように、プラグ弁１６から流体管１側を残して分岐管５を切断して撤去した後に、残された分岐管５の切断部、すなわちプラグ弁１６が取り付けられている分岐管５の切断部に、本発明に係る分岐管部撤去装置４３を取り付ける。   Next, as shown in FIG. 5, after the branch pipe 5 is cut and removed from the plug valve 16 while leaving the fluid pipe 1 side, the cut portion of the remaining branch pipe 5, that is, the plug valve 16 is attached. A branch pipe part removing device 43 according to the present invention is attached to the cutting part of the branch pipe 5.

ここで、本実施例の分岐管部撤去装置４３について、図５から図７に基づいて説明する。この分岐管部撤去装置４３は、流体管１と受口部３を接続する接続部２２を密封状に閉塞する閉塞駒１９と、分岐管５の切断部に密封状に固定されて閉塞駒１９を挿入する挿入装置２０とを備えている。   Here, the branch pipe part removing device 43 of the present embodiment will be described with reference to FIGS. This branch pipe part removing device 43 is sealed to the closing piece 19 for sealingly closing the connecting part 22 connecting the fluid pipe 1 and the receiving part 3, and the closing piece 19 being fixed to the cutting part of the branch pipe 5. The insertion device 20 is inserted.

まず、閉塞駒１９は、図６に示すように、分岐管部２の内径より小径の円盤状をなし、後面の外周部に周方向に延びる溝部４４を有する先端部材４５と、先端部材４５と略同径の円盤状をなし、前面の外周部に前方側に突出する突条部４６が設けられた基端部材４７と、先端部材４５及び基端部材４７と略同径の円筒状をなすゴム材からなる拡張部材４８と、後述するように拡張部材４８を流体管１の内壁面に圧着させるための圧着ボルト５０とからなる。   First, as shown in FIG. 6, the closing piece 19 is formed in a disk shape having a smaller diameter than the inner diameter of the branch pipe portion 2, and includes a tip member 45 having a groove portion 44 extending in the circumferential direction on the outer peripheral portion of the rear surface, A base end member 47 having a disk shape with substantially the same diameter and having a protrusion 46 protruding forward on the outer peripheral portion of the front surface, and a cylindrical shape with substantially the same diameter as the front end member 45 and the base end member 47 are formed. An expansion member 48 made of a rubber material and a crimping bolt 50 for crimping the expansion member 48 to the inner wall surface of the fluid pipe 1 as will be described later.

先端部材４５及び基端部材４７には、中心に前面側から後面側に連通する挿通孔５２、５３が形成されている。また、基端部材４７の挿通孔５３には、圧着ボルト５０のネジ部４９に対応するネジ溝が切られている。また、基端部材４７の後面には、後述する挿入装置本体５８の外軸部材５４の張出部５５を固定するボルト孔５６が設けられている。   The distal end member 45 and the base end member 47 are formed with insertion holes 52 and 53 that communicate from the front side to the rear side at the center. Further, a thread groove corresponding to the threaded portion 49 of the crimping bolt 50 is cut in the insertion hole 53 of the base end member 47. Further, a bolt hole 56 is provided on the rear surface of the base end member 47 to fix the protruding portion 55 of the outer shaft member 54 of the insertion device main body 58 to be described later.

また、拡張部材４８は、その一端が先端部材４５の溝部４４に嵌合される一方で、拡張部材４８の他端が拡張部材４８の外周面と基端部材４７の突条部４６の内周面とが当接されるように、先端部材４５と基端部材４７とで挟持される。そして、先端部材４５及び基端部材４７の挿通孔５２、５３には、先端部材４５側から基端部材４７側に圧着ボルト５０が挿入される。   One end of the expansion member 48 is fitted into the groove 44 of the distal end member 45, while the other end of the expansion member 48 is the outer peripheral surface of the expansion member 48 and the inner periphery of the protrusion 46 of the base end member 47. The front end member 45 and the base end member 47 are sandwiched so that the surface comes into contact. The crimp bolt 50 is inserted into the insertion holes 52 and 53 of the distal end member 45 and the proximal end member 47 from the distal end member 45 side to the proximal end member 47 side.

また、圧着ボルト５０は、その先端部に、径方向に突出する鍔状の鍔部５１が形成され、先端部寄りに、先端部材４５の挿通孔５２に遊嵌される棒状の棒状部９９が形成されている。更に、圧着ボルト５０の中央部には、設けられネジ山が切れられたネジ部４９が形成され、基端部には、後述する挿入装置本体５８の中軸部材６５と連結される連結部１００が形成されている。   Further, the crimp bolt 50 has a hook-shaped flange 51 projecting in the radial direction at the tip thereof, and a rod-like rod-like portion 99 fitted loosely in the insertion hole 52 of the tip member 45 near the tip. Is formed. Further, a screw portion 49 provided with a thread is cut is formed at the center portion of the crimping bolt 50, and a connecting portion 100 connected to a middle shaft member 65 of the insertion device main body 58 described later is formed at the base end portion. Is formed.

そして、閉塞駒１９は、外軸部材５４によって基端部材４７が回動不能に固定された状態で、基端部材４７に対して圧着ボルト５０が回転操作されると、図６（ｂ）に示すように、圧着ボルト５０が基端部材４７に対して紙面右側に移動して、鍔部５１で先端部材４５が基端部材４７方向に押圧され、先端部材４５と基端部材４７との離間距離が短縮される。これにより、先端部材４５により拡張部材４８が押圧され、拡張部材４８の外周壁が外径方向に変形して拡径して、拡張部材４８が流体管１の内壁面に圧着される。なお、拡張部材４８は、その内周面に周方向に幅広な溝状の幅広溝部５７を有することで、外周壁が外径方向に変形し易いように形成されている。   And when the crimping | compression-bonding volt | bolt 50 is rotated with respect to the base end member 47 in the state in which the base end member 47 was fixed non-rotatably by the outer shaft member 54, the closing piece 19 will be shown in FIG.6 (b). As shown, the crimping bolt 50 moves to the right side of the drawing with respect to the base end member 47, and the distal end member 45 is pressed toward the base end member 47 by the flange 51, so that the distal end member 45 and the base end member 47 are separated from each other. The distance is shortened. Accordingly, the expansion member 48 is pressed by the tip member 45, the outer peripheral wall of the expansion member 48 is deformed and expanded in the outer diameter direction, and the expansion member 48 is pressure-bonded to the inner wall surface of the fluid pipe 1. The expansion member 48 has a groove-like wide groove portion 57 that is wide in the circumferential direction on the inner peripheral surface thereof, so that the outer peripheral wall is easily deformed in the outer diameter direction.

次に、挿入装置２０は、閉塞駒１９を挿入して密封状態とする挿入装置本体５８と、挿入装置本体５８を分岐管５の外側から操作可能に密封状に保持する保持部５９と、保持部５９を切断部２１に密封状に固定する固定部６０と、分岐管５の管軸に垂直な方向に延設され挿入装置本体５８を支持する板状の移動プレート６１と、分岐管５の管軸方向に延びて略全長に亘って外周面が螺設され移動プレート６１を支持する棒ネジ状の送りネジ部材６２と、分岐管５の管軸に沿って延び移動プレート６１を支持する棒状の支柱６３と、流体管１の接続部２２の外周面に取り付けられ支柱６３を支持する支持具６４とから構成される。   Next, the insertion device 20 includes an insertion device main body 58 that is sealed by inserting the closing piece 19, a holding portion 59 that holds the insertion device main body 58 so as to be operable from the outside of the branch pipe 5, and a holding A fixing portion 60 for sealingly fixing the portion 59 to the cutting portion 21; a plate-shaped moving plate 61 that extends in a direction perpendicular to the tube axis of the branch pipe 5 and supports the insertion device body 58; A rod screw-like feed screw member 62 that extends in the tube axis direction and has an outer peripheral surface screwed over substantially the entire length to support the moving plate 61, and a rod shape that extends along the tube axis of the branch pipe 5 and supports the moving plate 61. The support 63 is attached to the outer peripheral surface of the connection portion 22 of the fluid pipe 1 and supports the support 63.

そして、挿入装置本体５８は、図７に示すように、外径方向に延設され閉塞駒１９の端面に当接される張出部５５が設けられた中空状で長寸の外軸部材５４と、外軸部材５４に周方向に回動可能に内嵌され外軸部材５４より若干長寸で円柱状の中軸部材６５と、中軸部材６５の後端部に着脱可能かつ相対回転不能に取り付けられ中軸部材６５より短寸で中空状の延長用中軸部材６６と、延長用中軸部材６６に着脱可能に内嵌され延長用中軸部材６６より若干長寸で円柱状の延長用固定ネジ部材６７と、外軸部材５４及び外軸部材５４に連ねられた延長用中軸部材６６が軸方向に摺動可能に内嵌される延長用外軸部材６８とからなる。   As shown in FIG. 7, the insertion device main body 58 has a hollow and long outer shaft member 54 provided with a projecting portion 55 that extends in the outer diameter direction and abuts against the end face of the closing piece 19. And a cylindrical inner shaft member 65 that is fitted in the outer shaft member 54 so as to be rotatable in the circumferential direction and is slightly longer than the outer shaft member 54, and is attached to the rear end portion of the middle shaft member 65 so as to be detachable and relatively non-rotatable. An extension middle shaft member 66 that is shorter than the middle shaft member 65 and has a hollow shape, and an extension fixing shaft member 67 that is detachably fitted to the extension middle shaft member 66 and that is slightly longer than the extension middle shaft member 66 and has a column shape. The outer shaft member 54 and the extending middle shaft member 66 connected to the outer shaft member 54 are internally fitted so as to be slidable in the axial direction.

挿入装置本体５８の中軸部材６５は、その先端部には中軸部材６５の軸線方向に延びる略正方形状の方形孔６９を有し、後端部には径方向断面が略正方形状をなす方形部７０を有している。そして、中軸部材６５は、方形部７０が外部に突出されるように外軸部材５４に内嵌される。この中軸部材６５の方形部７０には、延長用中軸部材６６の先端部に設けられた方形孔６６ａが外嵌される。これにより、中軸部材６５と延長用中軸部材６６とが相対回転不能にされている。   The middle shaft member 65 of the insertion device main body 58 has a substantially square-shaped square hole 69 extending in the axial direction of the middle shaft member 65 at the distal end, and a square portion having a substantially square radial cross section at the rear end. 70. The middle shaft member 65 is fitted into the outer shaft member 54 so that the rectangular portion 70 protrudes to the outside. A square hole 66 a provided at the distal end portion of the extending middle shaft member 66 is fitted on the square portion 70 of the middle shaft member 65. As a result, the middle shaft member 65 and the extending middle shaft member 66 are prevented from rotating relative to each other.

更に、延長用中軸部材６６内に、延長用固定ネジ部材６７が挿入され、延長用固定ネジ部材６７の先端部に設けられた雄ネジ部（図示略）と中軸部材６５の後端部に設けられた雌ネジ部（図示略）が締結されるとともに、延長用固定ネジ部材６７の後端部に設けられた雄ネジ部（図示略）にナット７１が締結されて、延長用固定ネジ部材６７が中軸部材６５に固定される。   Further, an extension fixing screw member 67 is inserted into the extension middle shaft member 66, and is provided at a male screw portion (not shown) provided at the distal end portion of the extension fixing screw member 67 and a rear end portion of the center shaft member 65. The female screw portion (not shown) is fastened, and the nut 71 is fastened to the male screw portion (not shown) provided at the rear end portion of the extension fixing screw member 67, so that the extension fixing screw member 67. Is fixed to the middle shaft member 65.

また、中軸部材６５や延長用固定ネジ部材６７が挿入されて一本のロッド状をなす外軸部材５４及び延長用中軸部材６６は、後端側から延長用外軸部材６８に挿入される。外軸部材５４の外周部と延長用外軸部材６８の内周部の一部は、それぞれ方形に形成されて互いに嵌合することで、同期して回転可能となっている。一方で、中軸部材６５の先端部の方形孔６９には、閉塞駒１９の圧着ボルト５０の連結部１００が、相対回転不能に挿入される。そして、外軸部材５４の先端部の張出部５５が、閉塞駒１９の基端部材４７の後面にボルト（図示略）で相対回転不能に固定される。尚、延長用外軸部材６８の後端部には、前方側よりも縮径され移動プレート６１の挿入孔７２に挿入される挿入部７３が設けられている。   Further, the outer shaft member 54 and the extending middle shaft member 66 that are formed into a single rod shape by inserting the middle shaft member 65 and the extension fixing screw member 67 are inserted into the extending outer shaft member 68 from the rear end side. A part of the outer peripheral part of the outer shaft member 54 and a part of the inner peripheral part of the extending outer shaft member 68 are formed in a square shape and are fitted to each other so that they can be rotated synchronously. On the other hand, the connecting portion 100 of the crimping bolt 50 of the closing piece 19 is inserted into the rectangular hole 69 at the distal end portion of the middle shaft member 65 so as not to be relatively rotatable. And the overhang | projection part 55 of the front-end | tip part of the outer shaft member 54 is fixed to the rear surface of the base end member 47 of the closing piece 19 with a volt | bolt (not shown) so that relative rotation is impossible. Note that an insertion portion 73 that is reduced in diameter from the front side and is inserted into the insertion hole 72 of the moving plate 61 is provided at the rear end portion of the extending outer shaft member 68.

次に、挿入装置２０の保持部５９は、図５に示すように、一端に分岐管５の切断部２１が挿入される受口部７４が形成され、他端に外径方向に突出された鍔状の取付フランジ部７５が形成された短寸筒状の短管４１と、分岐管５の管軸方向に連通された連通孔７９が中央部に形成され短管４１の取付フランジ部７５に接続される略円盤状のフランジ板７６とで構成される。   Next, as shown in FIG. 5, the holding portion 59 of the insertion device 20 is formed with a receiving portion 74 into which the cutting portion 21 of the branch pipe 5 is inserted at one end and protruded in the outer diameter direction at the other end. A short tubular short pipe 41 in which a bowl-shaped attachment flange portion 75 is formed, and a communication hole 79 communicating in the tube axis direction of the branch pipe 5 is formed in the center portion, and the attachment flange portion 75 of the short pipe 41 is formed in the attachment flange portion 75. It is comprised with the substantially disk-shaped flange board 76 connected.

短管４１の受口部７４の内周面には、周方向に延びる環状溝７７が形成され、この環状溝７７には、パッキン７８が圧入されている。そして、短管４１の取付フランジ部７５には、フランジ板７６がパッキン（図示略）を介してボルト・ナット（図示略）で固定されている。   An annular groove 77 extending in the circumferential direction is formed on the inner peripheral surface of the receiving portion 74 of the short pipe 41, and a packing 78 is press-fitted into the annular groove 77. A flange plate 76 is fixed to the mounting flange portion 75 of the short pipe 41 with bolts and nuts (not shown) through packing (not shown).

また、フランジ板７６の連通孔７９の内周には、環状の弾性体からなる丸ゴム８０が介在されて、挿入装置本体５８の延長用外軸部材６８が、分岐管５の管軸方向に摺動移動可能かつ密封状に保持されるようになっている。   Further, a round rubber 80 made of an annular elastic body is interposed on the inner periphery of the communication hole 79 of the flange plate 76, and the extension outer shaft member 68 of the insertion device main body 58 extends in the tube axis direction of the branch pipe 5. It is slidably movable and is held in a sealed state.

次に、挿入装置２０の固定部６０は、分岐管５の切断部２１に外嵌され、分岐管５の外径方向に延びる環状のフランジ部８１と、フランジ部８１の内部に配置され、フランジ部８１の内周面から内径方向に突出され先端が鋭利に形成された爪部８２と、短管４１の受口部３に備えられた弾性体からなる密封部材であるパッキン７８を押圧する押圧部８３とを備える離脱防止押輪４２からなる。   Next, the fixing portion 60 of the insertion device 20 is externally fitted to the cutting portion 21 of the branch pipe 5 and is disposed inside the flange portion 81 and an annular flange portion 81 extending in the outer diameter direction of the branch pipe 5. A claw portion 82 that protrudes in the inner diameter direction from the inner peripheral surface of the portion 81 and has a sharp tip, and a pressure that presses a packing 78 that is a sealing member made of an elastic body provided in the receiving portion 3 of the short tube 41 And a separation preventing pusher wheel 42 having a portion 83.

次いで、本実施例の分岐管部撤去装置４３を分岐管５の切断部２１に取り付ける取付方法について図５に基づいて説明する。   Next, an attachment method for attaching the branch pipe part removing device 43 of this embodiment to the cutting part 21 of the branch pipe 5 will be described with reference to FIG.

まず、短管４１の取付フランジ部７５にフランジ板７６を固定する一方で、挿入装置本体５８の先端部に閉塞駒１９を取り付けるとともに、挿入装置本体５８の後端部を短管４１の受口部７４側からフランジ板７６の連通孔７９に挿入することで、挿入装置２０を予め組み立てておく。尚、挿入装置本体５８の先端側には、挿入装置本体５８が分岐管５の管軸からずれることのないように、分岐管５の内壁に沿って摺動してガイドするガイド装置１０２を固定的に取り付けてある。   First, while fixing the flange plate 76 to the attachment flange portion 75 of the short tube 41, the closing piece 19 is attached to the distal end portion of the insertion device main body 58, and the rear end portion of the insertion device main body 58 is connected to the receiving port of the short tube 41. The insertion device 20 is assembled in advance by inserting it into the communication hole 79 of the flange plate 76 from the portion 74 side. A guide device 102 that slides and guides along the inner wall of the branch pipe 5 is fixed to the distal end side of the insertion apparatus main body 58 so that the insertion apparatus main body 58 is not displaced from the tube axis of the branch pipe 5. Attached.

そして、離脱防止押輪４２及びパッキン７８を分岐管５の切断部２１に外嵌させる。その後、挿入装置本体５８の先端に接続された閉塞駒１９を分岐管５内に配置しつつ、分岐管５の切断部２１に短管４１の受口部７４を嵌入する。更に、離脱防止押輪４２の押圧部８３を短管４１のパッキン７８に当接させるとともに、離脱防止押輪４２の爪部８２を外径側からボルト１０３で押圧して爪部８２の先端を切断部２１に食い込ませて、離脱防止押輪４２を切断部２１に固定する。   Then, the separation preventing pusher 42 and the packing 78 are fitted on the cutting portion 21 of the branch pipe 5. Thereafter, the receiving piece 74 of the short pipe 41 is inserted into the cutting part 21 of the branch pipe 5 while the closing piece 19 connected to the distal end of the insertion device main body 58 is disposed in the branch pipe 5. Further, the pressing portion 83 of the separation preventing push ring 42 is brought into contact with the packing 78 of the short tube 41, and the claw portion 82 of the separation preventing pushing ring 42 is pressed from the outer diameter side with the bolt 103 to cut the tip of the claw portion 82. 21, and the detachment prevention push ring 42 is fixed to the cutting portion 21.

また、離脱防止押輪４２のフランジ部８１と短管４１の受口部７４のフランジ部８５とを、複数のボルト・ナット８４で締結することで、受口部３のパッキン７８を受口部７４内に押圧して、短管４１と分岐管５の切断部２１とを密封状に固定する。これにより、挿入装置２０が、分岐管部２の外側からの操作で分岐管部２の管軸方向に進退移動可能に密封状に設置されることになる。また、分岐管部２の既設フランジ部を利用することなく密封性を確保して、挿入装置２０を分岐管部２に取り付けることができる。   Further, the packing 78 of the receiving portion 3 is received by the fastening portion 74 by fastening the flange portion 81 of the separation preventing push ring 42 and the flange portion 85 of the receiving portion 74 of the short pipe 41 with a plurality of bolts and nuts 84. The short pipe 41 and the cutting part 21 of the branch pipe 5 are fixed in a sealed state. Thus, the insertion device 20 is installed in a sealed manner so as to be movable back and forth in the tube axis direction of the branch pipe part 2 by an operation from the outside of the branch pipe part 2. In addition, the insertion device 20 can be attached to the branch pipe part 2 while ensuring the sealing performance without using the existing flange part of the branch pipe part 2.

次いで、挿入装置本体５８の延長用外軸部材６８の後端部を移動プレート６１の挿入孔７２に挿入する。延長用外軸部材６８の後端部における前側が挿入孔７２より大径となっていることで、延長用外軸部材６８の拡径部分が移動プレート６１の前面に当接され、延長用外軸部材６８が移動プレート６１に支持される。   Next, the rear end portion of the extension outer shaft member 68 of the insertion device main body 58 is inserted into the insertion hole 72 of the moving plate 61. Since the front side of the rear end portion of the extension outer shaft member 68 has a larger diameter than the insertion hole 72, the enlarged diameter portion of the extension outer shaft member 68 is brought into contact with the front surface of the moving plate 61, and the extension outer The shaft member 68 is supported by the moving plate 61.

また、送りネジ部材６２の一端を、フランジ板７６の後面に設けられた雌ネジ部８６に固定するとともに、送りネジ部材６２の他端を、移動プレート６１の挿入孔８７に挿入してナット８８で固定することで、分岐管５の管軸と平行に送りネジ部材６２を設置して、送りネジ部材６２で移動プレート６１を支持する。   In addition, one end of the feed screw member 62 is fixed to a female screw portion 86 provided on the rear surface of the flange plate 76, and the other end of the feed screw member 62 is inserted into the insertion hole 87 of the moving plate 61 so as to have a nut 88. The feed screw member 62 is installed in parallel with the tube axis of the branch pipe 5, and the moving plate 61 is supported by the feed screw member 62.

更に、流体管１の接続部２２の外周に二つ割りの支持具６４を外嵌させる。この支持具６４は、流体管１の外径方向に延設された延設部８９を有しており、延設部８９には分岐管５の管軸方向に連通する連通孔９０が設けられている。この連通孔９０に、分岐管５の管軸と平行に支柱６３を取り付ける。以上で、分岐管部撤去装置４３を分岐管５の切断部２１に取り付ける取付作業が完了する。   Further, the split support 64 is fitted on the outer periphery of the connection portion 22 of the fluid pipe 1. The support 64 has an extending portion 89 extending in the outer diameter direction of the fluid pipe 1, and the extending portion 89 is provided with a communication hole 90 that communicates in the tube axis direction of the branch pipe 5. ing. A column 63 is attached to the communication hole 90 in parallel with the tube axis of the branch pipe 5. Thus, the attachment work for attaching the branch pipe part removing device 43 to the cutting part 21 of the branch pipe 5 is completed.

次いで、図８に示すように、プラグ弁１６の操作部３６を回転操作して、弁体１８を徐々に移動させ、分岐管５の管路を開放して、プラグ弁１６より下流側の分岐管５内に流体を充填する。なお、プラグ弁１６の開放初期において、流体管１から分岐管５に流れ込む流体の圧力によって、閉塞駒１９が分岐管５の下流側に強く押圧されることがあるが、閉塞駒１９は、短管４１や送りネジ部材６２等を介して分岐管５に支持されているので、分岐管５の下流に移動されて、フランジ板７６等に接触して破損したり、疵付いたりすることが防止される。   Next, as shown in FIG. 8, the operating portion 36 of the plug valve 16 is rotationally operated to gradually move the valve element 18, open the branch pipe 5, and branch downstream from the plug valve 16. Fill the tube 5 with fluid. In the initial stage of opening the plug valve 16, the closing piece 19 may be strongly pressed to the downstream side of the branch pipe 5 by the pressure of the fluid flowing from the fluid pipe 1 into the branch pipe 5. Since it is supported by the branch pipe 5 via the pipe 41, the feed screw member 62, etc., it is prevented from being moved downstream of the branch pipe 5 and coming into contact with the flange plate 76, etc. Is done.

プラグ弁１６を開放した後、プラグ弁１６を開放状態で維持して、挿入装置２０の送りネジ部材６２の後側のナット８８の回転操作による送り及びチェーンブロック（図示略）を利用して、移動プレート６１と共に挿入装置本体５８を、分岐管５の管軸に沿って流体管１の中心方向に移動させ、閉塞駒１９を流体管１の接続部２２に挿入する。そして、移動プレート６１と支柱６３とを固定して、閉塞駒１９が接続部２２から移動することを防止する移動防止状態にする。   After the plug valve 16 is opened, the plug valve 16 is maintained in an open state, and a feed by a rotation operation of a nut 88 on the rear side of the feed screw member 62 of the insertion device 20 and a chain block (not shown) are used. The insertion device main body 58 is moved together with the moving plate 61 along the tube axis of the branch pipe 5 toward the center of the fluid pipe 1, and the closing piece 19 is inserted into the connection portion 22 of the fluid pipe 1. And the movement plate 61 and the support | pillar 63 are fixed, and it is set as the movement prevention state which prevents the closing piece 19 from moving from the connection part 22. FIG.

その後、挿入装置本体５８の延長用中軸部材６６を、後方に移動するように回転操作する。この延長用中軸部材６６は、前述したように、中軸部材６５を介して閉塞駒１９の圧着ボルト５０に相対回転不能に接続され、延長用外軸部材６８は、外軸部材５４を介して閉塞駒１９の基端部材４７に相対回転不能に接続されているので、延長用外軸部材６８に対して延長用中軸部材６６が後方に回転操作されると、閉塞駒１９の圧着ボルト５０が、基端部材４７に対して回転さるとともに後方に移動されることになる。圧着ボルト５０の移動に伴って、先端部材４５が圧着ボルト５０の鍔部５１に押圧されて基端部材４７側に移動されるので、基端部材４７と先端部材４５とで拡張部材４８が押圧されて拡径する。   Thereafter, the extending middle shaft member 66 of the insertion device main body 58 is rotated so as to move backward. As described above, the extending middle shaft member 66 is connected to the crimping bolt 50 of the closing piece 19 through the middle shaft member 65 so as not to be relatively rotatable, and the extending outer shaft member 68 is closed through the outer shaft member 54. Since it is connected to the base end member 47 of the piece 19 so as not to rotate relative thereto, when the extension middle shaft member 66 is rotated backward with respect to the extension outer shaft member 68, the crimping bolt 50 of the closing piece 19 is While rotating with respect to the base end member 47, it will move back. As the crimping bolt 50 moves, the distal end member 45 is pressed by the flange 51 of the crimping bolt 50 and moved toward the proximal end member 47, so that the expansion member 48 is pressed by the proximal end member 47 and the distal end member 45. The diameter is expanded.

拡張部材４８の外周面が流体管１の接続部２２の内壁に強く当接するように、延長用中軸部材６６を回転操作して、閉塞駒１９の拡張部材４８を拡径させ、流体管１の接続部２２を密封状に閉塞し、接続部２２よりも下流側の流れを遮断する。   The extension center shaft member 66 is rotated so that the outer peripheral surface of the expansion member 48 strongly contacts the inner wall of the connection portion 22 of the fluid pipe 1 to expand the diameter of the expansion member 48 of the closing piece 19. The connection part 22 is closed in a sealed manner, and the flow downstream from the connection part 22 is blocked.

次いで、図９に示すように、プラグ弁１６を開放した後に、挿入装置により流体管１の接続部２２内に閉塞駒１９を挿入して、接続部２２を密封状に閉塞した状態で、分岐管５を覆う上部ケース部材２４と下部ケース部材２５のボルト・ナット２６を外して、ケース体１７及びプラグ弁１６を分岐管５から撤去する。尚、閉塞駒１９が移動プレート６１等により移動防止状態にされているので、閉塞駒１９が流体管１内の流体の圧力で押圧されて、流体管１の接続部２２から分岐管５側に抜け出てしまうことなく、プラグ弁１６等の撤去作業を進めることができる。   Next, as shown in FIG. 9, after the plug valve 16 is opened, the closing piece 19 is inserted into the connection portion 22 of the fluid pipe 1 by the insertion device, and the connection portion 22 is closed in a sealed state. The bolts and nuts 26 of the upper case member 24 and the lower case member 25 that cover the pipe 5 are removed, and the case body 17 and the plug valve 16 are removed from the branch pipe 5. Since the closing piece 19 is prevented from moving by the moving plate 61 or the like, the closing piece 19 is pressed by the pressure of the fluid in the fluid pipe 1 so as to move from the connecting portion 22 of the fluid pipe 1 to the branch pipe 5 side. The removal work of the plug valve 16 and the like can proceed without coming out.

また、挿入装置２０のフランジ板７６及び移動プレート６１から送りネジ部材６２を外すとともに、流体管１の受口部３に接続された押輪１０及び離脱防止押輪１３を、これらを締結するボルト・ナット８を取り外して分岐管５から撤去する。そして、流体管１の受口部３から、残された分岐管５を取り外して、挿入装置２０を支持する支柱６３や挿入装置本体５８に荷重をかけないように、分岐管５を移動プレート６１の方向に移動させる。   In addition, the feed screw member 62 is removed from the flange plate 76 and the moving plate 61 of the insertion device 20, and the pusher wheel 10 and the detachment prevention pusher wheel 13 connected to the receiving port 3 of the fluid pipe 1 are tightened with bolts and nuts. 8 is removed and removed from the branch pipe 5. Then, the remaining branch pipe 5 is removed from the receiving portion 3 of the fluid pipe 1, and the branch pipe 5 is moved to the moving plate 61 so as not to apply a load to the column 63 and the insertion apparatus main body 58 that support the insertion apparatus 20. Move in the direction of.

次いで、図１０に示すように、閉塞駒１９の基端部材４７の後面に当接する当接部９１と流体管１の受口部３に接続されるフランジ部１０１を有する二つ割りの仮押輪９２を、当接部９１が閉塞駒１９に当接するように流体管１の受口部３に取り付けて、仮押輪９２と受口部３のフランジ部同士をボルト・ナット（図示略）で接続する。これにより、仮押輪９２を受口部３に着脱可能に固定し、閉塞駒１９を下流側から仮押輪９２によって支持する。   Next, as shown in FIG. 10, a split temporary pusher wheel 92 having a contact portion 91 that contacts the rear surface of the base end member 47 of the closing piece 19 and a flange portion 101 connected to the receiving portion 3 of the fluid pipe 1 is provided. The abutment portion 91 is attached to the receiving portion 3 of the fluid pipe 1 so as to abut on the closing piece 19, and the temporary push ring 92 and the flange portion of the receiving portion 3 are connected to each other with bolts and nuts (not shown). As a result, the temporary pushing wheel 92 is detachably fixed to the receiving portion 3, and the closing piece 19 is supported by the temporary pushing wheel 92 from the downstream side.

尚、仮押輪９２と受口部３の固定は、着脱可能に固定できるものであればフランジ同士によるものに限らず、例えば、受口部３のフランジの上流側の面に引っ掛けられる掛止部を設けて、掛止部と受口部３のフランジを固定するようにしてもよい。また、例えば、仮押輪に、流体管に外嵌される外嵌部と脱離防止押輪１３のような爪部とを備えさせて、仮押輪を流体管に外嵌させるとともに爪部を流体管の外周面に食い込ませることで、仮押輪を流体管に固定するようにしてもよく、これにより、流体管がフランジを有さない場合であっても、流体管に仮押輪を固定して閉塞駒を下流側から支持できる。   The fixing of the temporary presser wheel 92 and the receiving portion 3 is not limited to the flanges as long as they can be detachably fixed, for example, a hooking portion hooked on the upstream surface of the flange of the receiving portion 3. May be provided to fix the latching portion and the flange of the receiving portion 3. Further, for example, the temporary pusher wheel is provided with an outer fitting part fitted on the fluid pipe and a claw part such as the detachment prevention pusher wheel 13 so that the temporary pusher wheel is fitted on the fluid pipe and the claw part is fitted on the fluid pipe. The temporary pusher ring may be fixed to the fluid pipe by biting into the outer peripheral surface of the pipe, and even if the fluid pipe does not have a flange, the temporary pusher wheel is fixed to the fluid pipe and closed. The piece can be supported from the downstream side.

そして、支持具６４から支柱６３を取り外し、分岐管５及び分岐管５に固定された挿入装置２０の一部を後方に移動させて撤去する。尚、仮押輪９２によって、閉塞駒１９が支持されているので、閉塞駒１９が流体管１の接続部２２から抜け出てしまうことが防止された状態で、分岐管５の撤去作業を安全に行うことができる。   And the support | pillar 63 is removed from the support tool 64, and a part of the insertion device 20 fixed to the branch pipe 5 and the branch pipe 5 is moved backward and removed. Since the closing piece 19 is supported by the temporary pusher wheel 92, the removal operation of the branch pipe 5 is performed safely in a state in which the closing piece 19 is prevented from being pulled out from the connecting portion 22 of the fluid pipe 1. be able to.

尚、本実施例ではプラグ弁１６を分岐管５から撤去したうえで、分岐管５を流体管１から取り外しているが、プラグ弁１６が装着された状態で、プラグ弁１６とともに分岐管５を流体管１から取り外すようにしてもよい。   In this embodiment, the plug valve 16 is removed from the branch pipe 5 and then the branch pipe 5 is removed from the fluid pipe 1. However, the branch pipe 5 is connected together with the plug valve 16 with the plug valve 16 mounted. You may make it remove from the fluid pipe | tube 1. FIG.

分岐管５及び挿入装置２０の一部を撤去した後に、挿入装置本体５８の延長用外軸部材６８、延長用中軸部材６６及び延長用固定ネジ部材６７を中軸部材６５及び外軸部材５４から取り外して、挿入装置本体５８を短縮するとともに、支持具６４に支柱６３よりも短寸の短支柱９３を取り付ける。そして、流体管１の受口部３に接続されるフランジ部９４を有する環状の押付押輪９５を、挿入装置本体５８の外軸部材５４を通すように配置する。この押付押輪９５は、弾性体からなる環状の継手用ゴム輪が外嵌されており、押付押輪９５の後面側には、周方向に並ぶ複数のボルト固定孔９６が設けられている。更に、外軸部材５４の後端部及び短支柱９３の後端部に移動プレート６１を固定して、挿入装置本体５８を短支柱９３を介して流体管１に支持させる。   After removing the branch pipe 5 and part of the insertion device 20, the extension outer shaft member 68, the extension middle shaft member 66, and the extension fixing screw member 67 of the insertion device main body 58 are removed from the middle shaft member 65 and the outer shaft member 54. Thus, the insertion device main body 58 is shortened, and a short column 93 shorter than the column 63 is attached to the support 64. Then, an annular pressing pusher wheel 95 having a flange portion 94 connected to the receiving port 3 of the fluid pipe 1 is disposed so as to pass the outer shaft member 54 of the insertion device main body 58. An annular joint rubber ring made of an elastic body is externally fitted to the pressing pusher wheel 95, and a plurality of bolt fixing holes 96 arranged in the circumferential direction are provided on the rear surface side of the pressing pusher wheel 95. Further, the moving plate 61 is fixed to the rear end portion of the outer shaft member 54 and the rear end portion of the short column 93, and the insertion device main body 58 is supported by the fluid pipe 1 through the short column 93.

次いで、図１２に示すように、流体管１の受口部３から仮押輪９２を取り外して、押付押輪９５を受口部３に挿入し、受口部３と押付押輪９５のフランジ部９、９４をボルト・ナット（図示略）で接続する。その後、閉塞駒１９の圧着ボルト５０から挿入装置本体５８を取り外すとともに、流体管１の接続部２２から支持具６４を取り外して、挿入装置２０を撤去する。   Next, as shown in FIG. 12, the temporary pusher wheel 92 is removed from the receiving part 3 of the fluid pipe 1, and the pressing pusher wheel 95 is inserted into the receiving part 3, and the flange part 9 of the receiving part 3 and the pressing pusher wheel 95, 94 is connected with a bolt and a nut (not shown). Thereafter, the insertion device main body 58 is removed from the crimping bolt 50 of the closing piece 19, and the support tool 64 is removed from the connection portion 22 of the fluid pipe 1 to remove the insertion device 20.

そして、押付押輪９５の中央部に後側から流体管１の受口部３を閉塞する閉塞蓋９７を取り付けて、閉塞蓋９７を押付押輪９５にボルト９８で固定する。更に、閉塞蓋９７の中心部に設けられた係止孔にボルト９９を挿入して、閉塞蓋９７と圧着ボルト５０とを固定する。閉塞蓋９７と圧着ボルト５０とを固定することで、閉塞駒１９が縮径することが防止されて密封性の低下が回避されるので、長期間にわたって流体管１の受口部３を閉塞状態に維持することが可能になる。以上により、一連の分岐管部２の撤去作業が完了する。   Then, a closing lid 97 that closes the receiving portion 3 of the fluid pipe 1 is attached to the central portion of the pressing pusher wheel 95 from the rear side, and the closing lid 97 is fixed to the pressing pusher wheel 95 with a bolt 98. Further, a bolt 99 is inserted into a locking hole provided in the central portion of the closing lid 97 to fix the closing lid 97 and the crimping bolt 50. By fixing the closing lid 97 and the crimping bolt 50, the closing piece 19 is prevented from being reduced in diameter and the sealing performance is prevented from being lowered, so that the receiving portion 3 of the fluid pipe 1 is closed for a long period of time. Can be maintained. As described above, the removal work of the series of branch pipe portions 2 is completed.

以上、本発明に係る分岐管部撤去装置４３は、流体管１（既設流体管）から分岐された分岐管部２に取り付けられたプラグ弁１６（バルブ）を閉塞して、プラグ弁１６から流体管１側を残して分岐管部２が切断され、残された分岐管部２の切断部２１を通して分岐管部２内に閉塞駒１９（閉塞部材）を配置するとともに、閉塞駒１９の挿入装置本体５８（挿入手段）を密封状に保持させた保持部５９を切断部２１に密封状に固定部６０で固定することで、分岐管部２の既設フランジ部を利用することなく密封性を確保して、流体管１から分岐管部２を不断流状態で撤去することがきる。   As described above, the branch pipe part removing device 43 according to the present invention closes the plug valve 16 (valve) attached to the branch pipe part 2 branched from the fluid pipe 1 (existing fluid pipe), and fluids from the plug valve 16. The branch pipe portion 2 is cut leaving the pipe 1 side, and a closing piece 19 (blocking member) is disposed in the branch pipe portion 2 through the remaining cut portion 21 of the branch pipe portion 2 and an insertion device for the closing piece 19 By securing the holding portion 59 holding the main body 58 (insertion means) in a sealed manner to the cutting portion 21 with the fixing portion 60 in a sealed manner, the sealing performance is secured without using the existing flange portion of the branch pipe portion 2. Thus, the branch pipe portion 2 can be removed from the fluid pipe 1 in an uninterrupted state.

また、保持部５９が、一端が挿入装置本体５８（挿入手段）を分岐管部２の外側から操作可能に密封状に保持し、他端が受口部７４として形成された短管４１（受口管）であるので、一端が挿入装置本体５８を密封状に保持する短管４１の受口部７４が、残された分岐管部２の切断部２１に嵌入されることで、分岐管部２の切断部２１に挿入装置本体５８を密封状に保持することができる。   In addition, the holding portion 59 has one end holding the insertion device main body 58 (insertion means) in a sealed manner so that it can be operated from the outside of the branch pipe portion 2, and the other end is a short tube 41 (receiver) formed as a receiving portion 74. Therefore, the receiving port 74 of the short tube 41 whose one end holds the insertion device main body 58 in a sealed state is fitted into the remaining cut portion 21 of the branch tube portion 2, so that the branch tube portion The insertion device main body 58 can be held in a sealed state at the two cutting portions 21.

また、固定部６０が、残された分岐管部２の切断部２１の外周面に食い込む爪部８２と、受口部７４に接続されるフランジ部８１と、受口部７４の内部に設けられた弾性体からなるパッキン７８（密封部材）を押圧する押圧部８３とを有する離脱防止押輪４２（押輪）であるので、爪部８２を切断部２１に食い込ませた離脱防止押輪４２のフランジ部８１と受口部７４とが接続されることで、押圧部８３がパッキン７８を押圧して短管４１の内周面と切断部２１の外周面とに密着させることになるので、短管４１を切断部２１の外周面に密封状に固定することができる。   The fixing portion 60 is provided inside the claw portion 82 that bites into the outer peripheral surface of the remaining cut portion 21 of the branch pipe portion 2, the flange portion 81 connected to the receiving portion 74, and the receiving portion 74. Since it is a detachment prevention push ring 42 (push wheel) having a pressing portion 83 that presses the packing 78 (sealing member) made of an elastic body, the flange portion 81 of the detachment prevention push ring 42 with the claw portion 82 biting into the cutting portion 21. And the receiving portion 74 are connected, the pressing portion 83 presses the packing 78 to closely contact the inner peripheral surface of the short tube 41 and the outer peripheral surface of the cutting portion 21. It can be fixed to the outer peripheral surface of the cutting part 21 in a sealed manner.

また、本発明に係る分岐管部撤去方法は、流体管１（既設流体管）から分岐された分岐管部２のプラグ弁１６（バルブ）を閉塞した閉塞状態で、プラグ弁１６から流体管１側を残すように分岐管部２を切断し、残された分岐管部２の切断部２１に、閉塞駒１９（閉塞部材）と該閉塞駒１９を挿入する挿入装置本体５８（挿入手段）とを分岐管部２の外側からの操作で分岐管部２の管軸方向に進退移動可能に密封状に設置することで、分岐管部２の既設フランジ部を利用することなく密封性を確保して、流体管１から分岐管部２を不断流状態で撤去することがきる。   Moreover, the branch pipe part removal method according to the present invention is the fluid pipe 1 from the plug valve 16 in the closed state in which the plug valve 16 (valve) of the branch pipe part 2 branched from the fluid pipe 1 (existing fluid pipe) is closed. The branch pipe part 2 is cut so as to leave the side, and the closing piece 19 (closing member) and the insertion device main body 58 (insertion means) for inserting the closing piece 19 into the cut part 21 of the remaining branch pipe part 2 Is installed in a sealed manner so that it can be moved forward and backward in the direction of the tube axis of the branch pipe part 2 by operating from the outside of the branch pipe part 2, thereby ensuring sealing without using the existing flange part of the branch pipe part 2 Thus, the branch pipe portion 2 can be removed from the fluid pipe 1 in an uninterrupted state.

また、プラグ弁１６（バルブ）が、分割構造を有するケース体１７（筐体）を分岐管部２の所定位置の外周面に密封状に取り付けられ、該ケース体１７内の分岐管部２が不断流状態で穿孔されて形成された穿孔Ｑ（孔部）に挿入された弁体１８を備え、プラグ弁１６を分岐管部２に取り付けた後に、該プラグ弁１６から流体管１（既設流体管）側を残して分岐管部２を切断して撤去するので、分岐管部２の所定位置にケース体１７を密封状に取り付けて、弁体１８を挿入するための穿孔Ｑを形成することで、分岐管部２の所定位置にプラグ弁１６を取り付けて、このプラグ弁１６から流体管１側を残して分岐管部を切断するので、分岐管部２が切断される切断位置と閉塞駒１９（閉塞部材）で閉塞される閉塞位置との離間距離を所定長さに短縮して、分岐管部２の撤去工事をより簡便にできる。   Further, the plug valve 16 (valve) has a case body 17 (housing) having a divided structure attached to the outer peripheral surface at a predetermined position of the branch pipe portion 2 in a sealed manner, and the branch pipe portion 2 in the case body 17 is A valve body 18 inserted into a perforation Q (hole) formed by perforation in an uninterrupted flow state is provided, and after the plug valve 16 is attached to the branch pipe portion 2, the fluid pipe 1 (existing fluid) Since the branch pipe portion 2 is cut and removed while leaving the pipe) side, the case body 17 is attached in a sealed manner to a predetermined position of the branch pipe portion 2, and the perforation Q for inserting the valve body 18 is formed. Then, the plug valve 16 is attached to a predetermined position of the branch pipe part 2, and the branch pipe part is cut from the plug valve 16 while leaving the fluid pipe 1 side. Shorten the separation distance from the closing position closed by 19 (closing member) to a predetermined length To, can be the dismantling of the branch pipe portion 2 more easily.

以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。   Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

例えば、前記実施例では、既設流体管１の分岐管部２は、受口部３で分岐管５が接続されており、分岐管５の末端部が閉塞栓で密封状に閉塞されているものとして説明したが、例えば、分岐管の下流側に仕切弁やその他の部材が接続されていても構わない。   For example, in the above-described embodiment, the branch pipe portion 2 of the existing fluid pipe 1 is connected to the branch pipe 5 at the receiving portion 3, and the end portion of the branch pipe 5 is closed in a sealing manner with a closing plug. However, for example, a gate valve and other members may be connected to the downstream side of the branch pipe.

また、前記実施例では、分割構造を有するケース体１７を分岐管５の外周面に密封状に取り付けて、該ケース体内の分岐管５を不断流状態で穿孔して形成された穿孔Ｑ（孔部）に、弁体１８を挿入することで設置したプラグ弁１６を利用して、分岐管５を切断し撤去したが、例えば、分岐管部に予め取り付けられていたバルブを利用して、分岐管５を切断し撤去してもよい。   Further, in the embodiment, the case body 17 having the divided structure is attached to the outer peripheral surface of the branch pipe 5 in a sealed manner, and the branch pipe 5 (hole) formed by drilling the branch pipe 5 in the case body in an uninterrupted state. The branch pipe 5 is cut and removed using the plug valve 16 installed by inserting the valve body 18 into the part). For example, the branch pipe 5 is branched using the valve previously attached to the branch pipe part. The tube 5 may be cut and removed.

また、前記実施例では、バルブとしてプラグ弁１６を用いているが、閉塞駒１９が通過可能であれば、プラグ弁１６に限らず、例えば、薄い板状の弁体を有するナイフゲート弁や、球体状の弁体を有するボール弁であってもよく、弁体により開放される流路断面積が、流体管や分岐管の断面積よりも小さい弁であってもよい。   Moreover, in the said Example, although the plug valve 16 is used as a valve, as long as the closing piece 19 can pass, it is not restricted to the plug valve 16, for example, the knife gate valve which has a thin plate-shaped valve body, A ball valve having a spherical valve body may be used, and a valve having a flow passage cross-sectional area opened by the valve body may be smaller than a cross-sectional area of a fluid pipe or a branch pipe.

１ 流体管
２ 分岐管部
３ 受口部
４ 挿口部
５ 分岐管
９ フランジ部
１０ 押輪
１３ 離脱防止押輪
１６ プラグ弁（バルブ）
１７ ケース体
１９ 閉塞駒（閉塞部材）
２０ 挿入装置
２１ 切断部
２８ 作業弁
２９ 穿孔装置
３０ 作業用ケース
４１ 短管
４２ 離脱防止押輪
４３ 分岐管部撤去装置
５８ 挿入装置本体
５９ 保持部
６０ 固定部
７４ 受口部
７５ 取付フランジ部
７６ フランジ板
７８ パッキン（密封部材）
８２ 爪部
８３ 押圧部
８５ フランジ部
９２ 仮押輪
９５ 押付押輪
９７ 閉塞蓋
１０３ ボルト
Ｑ 穿孔（孔部） DESCRIPTION OF SYMBOLS 1 Fluid pipe 2 Branch pipe part 3 Receiving part 4 Insertion part 5 Branch pipe 9 Flange part 10 Push ring 13 Detachment prevention push ring 16 Plug valve (valve)
17 Case body 19 Blocking piece (blocking member)
20 Inserting device 21 Cutting unit 28 Work valve 29 Punching device 30 Working case 41 Short tube 42 Detachment pusher 43 Branch pipe removing device 58 Inserting device main body 59 Holding unit 60 Fixing unit 74 Receiving unit 75 Mounting flange unit 76 Flange plate 78 Packing (sealing member)
82 Claw part 83 Pressing part 85 Flange part 92 Temporary pressing ring 95 Pressing pressing ring 97 Closure lid 103 Bolt Q Perforation (hole part)

Claims (5)

既設流体管から分岐され、バルブが取り付けられた分岐管部に、前記既設流体管と前記分岐管部との流路を閉塞する閉塞部材を挿入して、前記バルブの開閉を利用し、前記閉塞部材で閉塞された前記既設流体管から前記分岐管部を不断流状態で撤去する分岐管部撤去装置であって、
前記バルブが閉塞された状態で、該バルブから前記既設流体管側を残して前記分岐管部が切断され、残された前記分岐管部の切断部を通して前記閉塞部材を挿入する挿入手段と、該挿入手段を前記分岐管部の外側から操作可能に密封状に保持する保持部と、該保持部を前記切断部に密封状に固定する固定部とを備えることを特徴とする分岐管部撤去装置。 A blocking member that closes the flow path between the existing fluid pipe and the branch pipe section is inserted into a branch pipe section that is branched from the existing fluid pipe and to which the valve is attached. A branch pipe part removing device that removes the branch pipe part from the existing fluid pipe closed by a member in an uninterrupted flow state,
An insertion means for cutting the branch pipe part from the valve while leaving the existing fluid pipe side and inserting the closing member through the remaining cut part of the branch pipe part in a state where the valve is closed; A branch pipe part removing device comprising: a holding part that holds the insertion means in a sealed manner so as to be operable from the outside of the branch pipe part; and a fixing part that fixes the holding part to the cutting part in a sealed manner. . 前記保持部が、一端が前記挿入手段を前記分岐管部の外側から操作可能に密封状に保持し、他端が受口部として形成された受口管であることを特徴とする請求項１に記載の分岐管部撤去装置。   2. The holding part is a receiving pipe having one end holding the insertion means in a sealed state so as to be operable from the outside of the branch pipe part and the other end being formed as a receiving part. The branch pipe part removing device described in 1. 前記固定部が、残された前記分岐管部の切断部の外周面に食い込む爪部と、前記受口管に接続されるフランジ部と、前記受口管の内部に設けられた弾性体からなる密封部材を押圧する押圧部とを有する押輪であることを特徴とする請求項２に記載の分岐管部撤去装置。   The fixing portion is composed of a claw portion that bites into the outer peripheral surface of the remaining cut portion of the branch pipe portion, a flange portion connected to the receiving pipe, and an elastic body provided inside the receiving pipe. The branch pipe part removing device according to claim 2, wherein the branch pipe part removing device is a push ring having a pressing part that presses the sealing member. 既設流体管から分岐され、バルブが取り付けられた分岐管部に、前記既設流体管と前記分岐管部との流路を閉塞する閉塞部材を挿入して、前記バルブの開閉を利用し、前記閉塞部材で閉塞された前記既設流体管から前記分岐管部を不断流状態で撤去する分岐管部撤去方法であって、
前記バルブを閉塞した状態で、該バルブから前記既設流体管側を残して前記分岐管部を切断して撤去し、
残された前記分岐管部の切断部に、前記バルブを閉塞した状態で、前記閉塞部材と該閉塞部材を挿入する挿入手段とを前記分岐管部の外側からの操作で前記分岐管部の管軸方向に進退移動可能に密封状に設置し、
前記バルブを開放した後に、前記挿入手段により前記既設流体管内に前記閉塞部材を挿入して、前記既設流体管を閉塞した状態で、残された前記分岐管部を前記既設流体管から撤去することを特徴とする分岐管部撤去方法。 A blocking member that closes the flow path between the existing fluid pipe and the branch pipe section is inserted into a branch pipe section that is branched from the existing fluid pipe and to which the valve is attached. A branch pipe part removal method for removing the branch pipe part in an uninterrupted state from the existing fluid pipe blocked by a member,
With the valve closed, the branch pipe part is cut off and removed from the valve, leaving the existing fluid pipe side,
In the state where the valve is closed in the remaining cut portion of the branch pipe portion, the closing member and the insertion means for inserting the closing member are operated from the outside of the branch pipe portion by the operation from the outside of the branch pipe portion. Installed in a sealed manner so that it can move back and forth in the axial direction,
After the valve is opened, the closing member is inserted into the existing fluid pipe by the insertion means, and the remaining branch pipe portion is removed from the existing fluid pipe in a state where the existing fluid pipe is closed. The branch pipe part removal method characterized by this. 前記バルブが、分割構造を有する筐体を前記分岐管部の所定位置の外周面に密封状に取り付けられ、該筐体内の前記分岐管部が不断流状態で穿孔されて形成された孔部に挿入された弁体を備え、前記バルブを前記分岐管部に取り付けた後に、該バルブから前記既設流体管側を残して前記分岐管部を切断して撤去することを特徴とする請求項４に記載の分岐管部撤去方法。   In the hole formed by the valve, a housing having a divided structure is attached to the outer peripheral surface of the branch pipe portion at a predetermined position in a sealed manner, and the branch pipe portion in the housing is perforated in an uninterrupted state. 5. The valve body according to claim 4, further comprising an inserted valve body, wherein after the valve is attached to the branch pipe portion, the branch pipe portion is cut and removed from the valve while leaving the existing fluid pipe side. The branch pipe removal method described.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017101703A (en) * 2015-11-30 2017-06-08 コスモ工機株式会社 Block device and method for removing pipe connection member with block device
WO2019116617A1 (en) 2017-01-30 2019-06-20 株式会社水道技術開発機構 Method of removing valve in fluid pipe line structure, fluid pipe line structure, and valve device
JP2021014881A (en) * 2019-07-12 2021-02-12 六菱ゴム株式会社 Valve exchange device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3985716B2 (en) * 2002-05-09 2007-10-03 村田機械株式会社 Yarn splicing method and apparatus

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61122490U (en) * 1985-01-18 1986-08-01
JPS62133080U (en) * 1986-02-17 1987-08-21
JPH0272290A (en) * 1988-09-02 1990-03-12 Toho Gas Kk Removal construction and device for takeoff pipe
JPH0632894U (en) * 1992-10-06 1994-04-28 株式会社クボタ Stopcock
JPH0972470A (en) * 1995-09-04 1997-03-18 Cosmo Koki Co Ltd Expansion fluid pipe for coupling fluid pipe
JP2000310353A (en) * 1999-04-26 2000-11-07 Tokyo Gas Co Ltd Valve replacing method and tool
JP2002340275A (en) * 2001-05-18 2002-11-27 Cosmo Koki Co Ltd Removal method and device for gate valve in non-cutoff water
JP2005106083A (en) * 2003-09-26 2005-04-21 Cosmo Koki Co Ltd Split t-shaped pipe removing method
JP2005265087A (en) * 2004-03-19 2005-09-29 Cosmo Koki Co Ltd Method for replacing sub-valve attached on branch opening
JP2006329227A (en) * 2005-05-23 2006-12-07 Waterworks Technology Development Organization Co Ltd Branch pipe renewing technique
WO2009061042A1 (en) * 2007-11-05 2009-05-14 Gye Myeong Co., Ltd. Pipe clamp with pipe branch
US20110187096A1 (en) * 2008-09-25 2011-08-04 Per Lillejordet Plugged Hot Tap Tee
JP2012062988A (en) * 2010-09-17 2012-03-29 Waterworks Technology Development Organization Co Ltd Method of renewing opening-closing valve of fluid pipe system and closure device used for the same
JP2013007232A (en) * 2011-06-27 2013-01-10 Daiyu Freeze:Kk Repair method of distributing pipe and cutoff plug device for the same

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61122490U (en) * 1985-01-18 1986-08-01
JPS62133080U (en) * 1986-02-17 1987-08-21
JPH0272290A (en) * 1988-09-02 1990-03-12 Toho Gas Kk Removal construction and device for takeoff pipe
JPH0632894U (en) * 1992-10-06 1994-04-28 株式会社クボタ Stopcock
JPH0972470A (en) * 1995-09-04 1997-03-18 Cosmo Koki Co Ltd Expansion fluid pipe for coupling fluid pipe
JP2000310353A (en) * 1999-04-26 2000-11-07 Tokyo Gas Co Ltd Valve replacing method and tool
JP2002340275A (en) * 2001-05-18 2002-11-27 Cosmo Koki Co Ltd Removal method and device for gate valve in non-cutoff water
JP2005106083A (en) * 2003-09-26 2005-04-21 Cosmo Koki Co Ltd Split t-shaped pipe removing method
JP2005265087A (en) * 2004-03-19 2005-09-29 Cosmo Koki Co Ltd Method for replacing sub-valve attached on branch opening
JP2006329227A (en) * 2005-05-23 2006-12-07 Waterworks Technology Development Organization Co Ltd Branch pipe renewing technique
WO2009061042A1 (en) * 2007-11-05 2009-05-14 Gye Myeong Co., Ltd. Pipe clamp with pipe branch
US20110187096A1 (en) * 2008-09-25 2011-08-04 Per Lillejordet Plugged Hot Tap Tee
JP2012062988A (en) * 2010-09-17 2012-03-29 Waterworks Technology Development Organization Co Ltd Method of renewing opening-closing valve of fluid pipe system and closure device used for the same
JP2013007232A (en) * 2011-06-27 2013-01-10 Daiyu Freeze:Kk Repair method of distributing pipe and cutoff plug device for the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017101703A (en) * 2015-11-30 2017-06-08 コスモ工機株式会社 Block device and method for removing pipe connection member with block device
WO2019116617A1 (en) 2017-01-30 2019-06-20 株式会社水道技術開発機構 Method of removing valve in fluid pipe line structure, fluid pipe line structure, and valve device
US11287058B2 (en) 2017-01-30 2022-03-29 Waterworks Technology Development Organization Co. Valve removal method of fluid pipeline structure, fluid pipeline structure, and valve device
JP2021014881A (en) * 2019-07-12 2021-02-12 六菱ゴム株式会社 Valve exchange device
JP7391350B2 (en) 2019-07-12 2023-12-05 六菱ゴム株式会社 Valve replacement device

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