JP6686105B2 - Water pipe structure - Google Patents
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- JP6686105B2 JP6686105B2 JP2018215739A JP2018215739A JP6686105B2 JP 6686105 B2 JP6686105 B2 JP 6686105B2 JP 2018215739 A JP2018215739 A JP 2018215739A JP 2018215739 A JP2018215739 A JP 2018215739A JP 6686105 B2 JP6686105 B2 JP 6686105B2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 355
- 239000008399 tap water Substances 0.000 claims description 86
- 235000020679 tap water Nutrition 0.000 claims description 86
- 238000011144 upstream manufacturing Methods 0.000 claims description 16
- 238000010276 construction Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Safety Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Description
本発明は、ボックス内に水道用メータを収容可能に構成されている給水管構造に関する。 TECHNICAL FIELD The present invention relates to a water supply pipe structure configured to accommodate a water meter in a box.
かかる給水管構造においては、配水池から水道水を流すための本管が設けられ、その本管の上流側には、地震発生時に水道水の流れを遮断するための本管用遮断弁が設けられている（例えば特許文献１参照）。 In such a water supply pipe structure, a main pipe for flowing tap water from a distribution reservoir is provided, and a main cutoff valve for shutting off the flow of tap water when an earthquake occurs is provided upstream of the main pipe. (See, for example, Patent Document 1).
また、本管用遮断弁よりも下流側の本管には、所定間隔を置いて複数の手動式の仕切弁が設けられている。そして、本管用遮断弁と仕切弁との間や水道水流れ方向で隣り合う２つの仕切弁間において、本管から需要者側へ給水を行うための給水管構造が設けられる。この給水管構造は、本管に分水栓を介して接続される一次側給水管と、一次側給水管の水道水の流出側端部に接続される止水栓及びこの止水栓の水道水の流出側端部に接続される自治体の管轄の末端にある水道用メータが収容可能なボックスと、水道用メータの水道水の流出側端部が接続される需要者の所有物である二次側給水管とを備えている。このように給水管構造を備えることによって、本管からの水道水を需要者へ供給することができる（例えば特許文献２参照）。 Further, a plurality of manually operated sluice valves are provided at predetermined intervals in the main pipe downstream of the main cutoff valve. A water supply pipe structure for supplying water from the main pipe to the consumer side is provided between the main shutoff valve and the sluice valve and between two sluice valves adjacent to each other in the tap water flow direction. This water supply pipe structure consists of a primary side water supply pipe connected to the main pipe via a water faucet, a water stopcock connected to the outlet side end of the tap water of the primary side water supply pipe, and the water supply of this waterstop. A box that can be connected to the outflow side end of the water and can accommodate a water meter at the end of the jurisdiction of the municipality, and the water meter outflow end of the water meter is a property of the customer. It is equipped with a secondary water supply pipe. By providing the water supply pipe structure in this manner, tap water from the main pipe can be supplied to the consumer (see, for example, Patent Document 2).
そして、地震が発生すると、本管用遮断弁が閉じられ、本管から需要者への給水が停止して断水になる。そして、自治体の職員は、自治体管轄全域において断水をすばやく復旧するため、自治体が管轄する本管を優先して破損等がないか検査していく。具体的には、地震が沈静化した後、閉じられている本管用遮断弁の下流側に位置する仕切弁を手動により閉じる。この後、本管用遮断弁と仕切弁との間の本管に通水をして水圧検査を行う。その水圧検査の結果が合格であれば、続いて、前記仕切弁とこの仕切弁よりも下流側に位置する仕切弁を手動により閉じて、これら２つの仕切弁間の本管の水圧検査を行い、これを繰り返していく。 Then, when an earthquake occurs, the main cutoff valve is closed, and the water supply from the main pipe to the consumer is stopped and the water is cut off. Then, in order to quickly restore the water supply in the entire area under the jurisdiction of the local government, the staff of the local government gives priority to the main body under the jurisdiction of the local government and inspects for damage. Specifically, after the earthquake subsides, the sluice valve located downstream of the closed main shutoff valve is manually closed. After this, water is passed through the main pipe between the main shutoff valve and the sluice valve to perform a water pressure test. If the result of the water pressure test is acceptable, then the sluice valve and the sluice valve located on the downstream side of the sluice valve are closed manually, and the water pressure of the main pipe between these two sluice valves is inspected. , Repeat this.
しかしながら、閉じられている水圧検査の対象となる本管用遮断弁と仕切弁との間又は仕切弁と仕切弁との間の本管から分岐（接続）している給水管において、例えば需要者宅内の給水管（二次側給水管）の破損が生じている場合には、水圧検査で合格となる良好な検査結果が得られない。そればかりか、本管（自治体管轄）で破損しているのか、二次側給水管（需要者所有物）で破損しているのかを特定できない。 However, in a water supply pipe that is branched (connected) from the main pipe between the main shutoff valve and the sluice valve or between the sluice valve and the sluice valve, which is the target of the water pressure inspection that is closed, for example, in the customer premises If the water supply pipe (secondary side water supply pipe) is damaged, a good inspection result that passes the water pressure inspection cannot be obtained. Not only that, it is not possible to identify whether the main water supply (local government jurisdiction) is damaged or the secondary water supply water supply (owner's property) is damaged.
そこで、ボックス内の止水栓の回転ハンドルを手動で回転させて止水栓を閉じることにより、本管及び本管から一次側給水管までの水圧検査を行うことができる。この水圧検査の結果が、合格である場合には、二次側給水管に破損があることが考えられる。また、前記本管から一次側給水管までの水圧検査が不合格であった場合には、少なくとも本管又は一次側給水管あるいはそれら両方の管に破損があることを特定できる。しかしながら、止水栓が設置されている各需要者宅まで移動して各止水栓を一つずつ閉じなければならず、その閉じる作業が非常に時間のかかる煩わしい作業で断水時間の長期化になり、改善の余地があった。 Therefore, by manually rotating the rotary handle of the water stopcock in the box to close the water stopcock, the water pressure test from the main pipe and the main pipe to the primary side water supply pipe can be performed. If the result of the water pressure test is acceptable, it is considered that the secondary side water supply pipe is damaged. Further, when the water pressure test from the main pipe to the primary side water supply pipe fails, it can be specified that at least the main pipe, the primary side water supply pipe, or both pipes are damaged. However, it is necessary to move to each customer's house where the water faucet is installed and close each water faucet one by one. There was room for improvement.
本発明は前述の状況に鑑み、解決しようとするところは、本管の復旧作業を効率よく行って断水をいち早く解消することができる給水管構造を提供するものである。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a water supply pipe structure capable of efficiently performing restoration work of a main pipe and quickly eliminating water cutoff.
本発明の給水管構造は、前述の課題解決のために、本管に接続される一次側給水管と、前記一次側給水管の水道水の流出側端部に接続される水道用メータの水道水の流出側端部に接続される二次側給水管と、前記一次側給水管と前記水道用メータとの間又は前記水道用メータと前記二次側給水管との間に配置され、地震検知器を収納し、地震により発生する所定の大きさの振動を前記地震検知器が検出することで作動して水道水の流れを遮断する給水管用遮断弁と、該給水管用遮断弁及び前記水道用メータを収容可能であり地中に埋設されるボックスと、を設けたことを特徴としている。 In order to solve the above-mentioned problems, the water supply pipe structure of the present invention has a primary side water supply pipe connected to the main pipe, and a water meter of a water meter connected to the outlet side end of the tap water of the primary side water supply pipe. The secondary side water supply pipe connected to the outflow side end of water, and is arranged between the primary side water supply pipe and the water meter or between the water meter and the secondary water pipe, the earthquake A water supply pipe shutoff valve that houses a detector and shuts off the flow of tap water by operating when the earthquake detector detects vibration of a predetermined magnitude generated by an earthquake, and the water supply pipe shutoff valve and the waterworks A box that can accommodate a meter for use and is buried in the ground is provided.
また、前記実施形態の給水管構造は、前記給水管用遮断弁は電動弁からなり、該電動弁は、水道水の流れを遮断する弁体を備える弁箱部と、前記弁体に連結された弁軸を介して該弁体を前記弁箱部内で開閉操作させる駆動機構が収納される駆動機構部とを備え、前記弁箱部の水道水の流れ方向における中心位置が、前記弁軸に対して前記水道用メータ側にずれており、前記駆動機構部の水道水の流れ方向における中心位置が、前記弁箱部における前記中心位置に対して前記水道用メータ側にずれていてもよい。 Further, in the water supply pipe structure of the embodiment, the water supply pipe cutoff valve is formed of an electric valve, and the electric valve is connected to the valve body and a valve box portion having a valve body for cutting off the flow of tap water. And a drive mechanism section for accommodating a drive mechanism for opening and closing the valve body in the valve box section through a valve shaft, wherein the center position of the valve box section in the flow direction of tap water is relative to the valve shaft. May be displaced toward the water meter side, and the center position of the drive mechanism portion in the flow direction of the tap water may be displaced toward the water meter side with respect to the center position of the valve box portion.
また、前記実施形態の給水管構造は、前記給水管用遮断弁は、前記水道用メータと前記二次側給水管との間に配置され、水道水の流れ方向上流側端に継ぎ手を備え、前記水道用メータは、水道水の流れ方向下手側端に螺子部を備え、前記継ぎ手は、前記水道用メータの前記螺子部にねじ込まれて接続されていてもよい。 Further, in the water supply pipe structure of the embodiment, the water supply pipe cutoff valve is disposed between the water meter and the secondary side water supply pipe, and a joint is provided at an upstream end in a flow direction of tap water, The water meter may be provided with a screw portion at the lower end in the flow direction of the tap water, and the joint may be screwed into and connected to the screw portion of the water meter.
また、前記実施形態の給水管構造は、前記給水管用遮断弁は電動弁からなり、該電動弁が、水道水の流れを遮断する弁体を備える弁箱部と、前記弁体に連結された弁軸を介して該弁体を前記弁箱部内で開閉操作させる駆動機構が収納される駆動機構部とを備え、前記ボックスは、水道水の流れ方向上流側に位置する側壁と水道水の流れ方向下流側に位置する側壁との内側に形成され、前記水道用メータ側へ突出する複数の縦リブを備え、前記複数の縦リブの各々における前記水道用メータ側の端面は、上方に向うほど水道用メータ側に位置する傾斜面であり、前記駆動機構を収納するケースは、水道水の流れ方向下流側の端面につき、上方に向うほど水道用メータ側に位置する傾斜面を備えていてもよい。 Further, in the water supply pipe structure of the embodiment, the water supply pipe cutoff valve is composed of an electrically operated valve, and the electrically operated valve is connected to the valve body having a valve body for cutting off the flow of tap water, and the valve body. And a drive mechanism portion for accommodating a drive mechanism for opening and closing the valve body in the valve box portion via a valve shaft, wherein the box is a side wall located upstream in a flow direction of the tap water and the flow of the tap water. A plurality of vertical ribs formed on the inner side of the side wall located on the downstream side in the direction and protruding toward the water meter side, and the end surface on the water meter side of each of the plurality of vertical ribs are located toward the upper side. It is an inclined surface located on the water meter side, and the case that houses the drive mechanism has an inclined surface located on the water meter side as it goes upward with respect to the end surface on the downstream side in the flow direction of the tap water. Good.
また、前記実施形態の給水管構造は、前記一次側給水管と前記水道用メータとの間に水道水の流れを止めるための止水栓が配置され、前記給水管用遮断弁は、前記止水栓よりも高い位置に配置されていてもよい。 Further, in the water supply pipe structure of the embodiment, a water stopcock for stopping the flow of tap water is arranged between the primary side water supply pipe and the water meter, and the water supply pipe cutoff valve is the water stoppage. It may be arranged at a position higher than the stopper.
本発明によれば、地震により所定の大きさの振動が発生すると、ボックス内に設けた給水管用遮断弁が閉じるので、自治体が管轄している配管の不良箇所を直ちに把握することができ、本管の復旧作業を効率よく行って断水をいち早く解消することができる給水管構造を提供することができる。また、水道用メータを収容可能なボックスに給水管用遮断弁を納めることで、新たな掘削が不要で、設置費用を安くできる利点がある。更にまた、給水管用遮断弁が水道用メータの直近にあることで、自治体が維持管理を容易に行え、需要者も遮断状況の確認を容易にできる利点もある。 According to the present invention, when a predetermined magnitude of vibration occurs due to an earthquake, the shutoff valve for the water supply pipe provided in the box closes, so that a defective portion of the pipe under the jurisdiction of the local government can be immediately grasped. It is possible to provide a water supply pipe structure capable of efficiently performing water restoration work by quickly performing pipe restoration work. Further, by installing the water pipe shutoff valve in a box capable of accommodating a water meter, there is an advantage that new excavation is not required and installation cost can be reduced. Furthermore, since the shutoff valve for the water supply pipe is in the vicinity of the water meter, there is an advantage that the local government can easily perform the maintenance and management, and the user can easily check the shutoff status.
図１に、本発明の給水管構造を有する水道設備の概略平面図を示している。この水道設備は、図示していない配水池からの水道水を流すための本管１と、本管１の上流側に設けられた本管用遮断弁２と、本管用遮断弁２に対して下流側に設けられた手動式の仕切弁２Ａと、本管用遮断弁２と仕切弁２Ａとの間に分水栓（図示せず）を介して接続される多数（図３では４個）の給水管構造３とを備えている。給水管構造３へ供給される水道水は、需要者宅（戸建て住宅又は集合住宅等）Ｈが利用できる。図１では、１個の仕切弁２Ａのみを示しているが、図１に示した仕切弁２Ａよりも下流側の本管１にも仕切弁を設けてもよい。 FIG. 1 shows a schematic plan view of a water supply facility having a water supply pipe structure of the present invention. This water supply facility comprises a main pipe 1 for flowing tap water from a distribution reservoir (not shown), a main cutoff valve 2 provided upstream of the main pipe 1, and a main cutoff valve 2 downstream of the main cutoff valve 2. A plurality of (4 in FIG. 3) water supply connected between a manual type sluice valve 2A provided on the side and a main shutoff valve 2 and a sluice valve 2A via a water faucet (not shown). The tube structure 3 is provided. The tap water supplied to the water supply pipe structure 3 can be used by a consumer's house (a detached house or an apartment house) H. Although only one sluice valve 2A is shown in FIG. 1, a sluice valve may be provided in the main pipe 1 on the downstream side of the sluice valve 2A shown in FIG.
給水管構造３は、図１〜図３に示すように、本管１に分水栓（図示せず）を介して接続される一次側給水管４と、収容空間を有するボックス５と、ボックス５内に収容される止水栓６と、給水管用遮断弁７と、給水管用遮断弁７の水道水の流出側端部に接続される二次側給水管８とを備えている。尚、図２では、図３の蓋９を取り外した状態を示している。 As shown in FIGS. 1 to 3, the water supply pipe structure 3 includes a primary water supply pipe 4 connected to the main pipe 1 via a water dip (not shown), a box 5 having a storage space, and a box. 5, a water stopcock 6 housed in the water supply pipe 5, a water supply pipe cutoff valve 7, and a secondary side water supply pipe 8 connected to the tap water outflow end of the water supply pipe cutoff valve 7. Note that FIG. 2 shows a state in which the lid 9 of FIG. 3 is removed.
止水栓６と給水管用遮断弁７との間には、自治体の管轄の末端にある水道用メータＭが配置される。水道用メータＭに対して水道水の流入側となる一次側に止水栓６が配置され、水道用メータＭに対して水道水の流出側となる二次側に給水管用遮断弁７が配置されている。従って、ボックス５の長手方向において、水道用メータＭをほぼ中央部に配置することができ、ボックス５の蓋９（後述する）を開けて水道用メータＭの検針やメンテナンスを行い易い利点がある。また、止水栓６と給水管用遮断弁７の高さが、水道用メータＭの高さよりも高くなっていることから、止水栓６の回転ハンドル１８の操作や給水管用遮断弁７の手動操作ハンドル２７の操作がし易いという利点がある。また、水道用メータＭには、メータの目盛り等を覆うべくヒンジにより開閉揺動可能な蓋（カバー）が取り付けられている。このことから、蓋（カバー）を開けた時のスペースが水道用メータＭの上方に必要となるため、その上方のスペースも考慮して水道用メータＭの高さをできるだけ低く設定することが好ましい。更にまた、給水管用遮断弁７を止水栓６よりも少し高くなるように設定することによって、後述の第２ケース２６Ｋに備える電源供給機構のメンテナンス作業を行い易いだけでなく、地中に埋設されているボックス５内に水が溜まっている場合でも、高い位置にある電源供給機構に水が浸かることを回避し易い。 A water meter M located at the end of the jurisdiction of the local government is arranged between the stop cock 6 and the water supply pipe cutoff valve 7. The water stopcock 6 is arranged on the primary side that is the inflow side of the tap water with respect to the water meter M, and the water supply pipe cutoff valve 7 is arranged on the secondary side that is the outflow side of the tap water with respect to the water meter M. Has been done. Therefore, in the longitudinal direction of the box 5, the water meter M can be arranged substantially at the center, and there is an advantage that the lid 9 (described later) of the box 5 can be opened to easily perform meter reading and maintenance of the water meter M. . Further, since the heights of the water stopcock 6 and the water supply pipe cutoff valve 7 are higher than the height of the water meter M, the operation of the rotary handle 18 of the water stopcock 6 and the manual operation of the water supply pipe cutoff valve 7 are performed. There is an advantage that the operation handle 27 can be easily operated. Further, the water meter M is provided with a lid (cover) which can be opened and closed by a hinge so as to cover the scale and the like of the meter. For this reason, a space when the lid (cover) is opened is required above the water meter M, and therefore it is preferable to set the height of the water meter M as low as possible in consideration of the space above it. . Furthermore, by setting the cutoff valve 7 for the water supply pipe to be slightly higher than the water stopcock 6, not only the maintenance work of the power supply mechanism provided in the second case 26K described later is easy to perform but also it is buried in the ground. Even if water is stored in the box 5 that is closed, it is easy to avoid that water is submerged in the power supply mechanism located at a high position.
ボックス５は、上方が開放され、平面視において矩形状（図１では長方形）の底壁１０と、底壁１０の外周縁から上方に立ち上げられた側壁１１とを備えている。側壁１１は、４つの縦壁である前壁１２、後壁１３、左側壁１４、右側壁１５を備えている。前壁１２が水道水の流れ方向上流側に位置し、後壁１３が水道水の流れ方向下流側に位置している。また、図３に示すように、側壁１１の上端に、上方開口１１Ａを閉じる蓋９を開閉可能に備えている。前壁１２及び後壁１３の内側には、水道水の流れ方向と直交する左右幅方向に沿って間隔を置いて水道用メータＭ側へ突出する複数の壁補強用の板状の縦リブ１２Ａ，１３Ａが形成されている。この縦リブ１２Ａ，１３Ａの水道用メータＭ側の端面１２ａ，１３ａは、上方に向うほど水道用メータＭ側に位置する傾斜面に構成されている。 The box 5 is open at the top and includes a bottom wall 10 that is rectangular (rectangular in FIG. 1) in a plan view, and a side wall 11 that rises upward from the outer peripheral edge of the bottom wall 10. The side wall 11 includes a front wall 12, a rear wall 13, a left side wall 14, and a right side wall 15, which are four vertical walls. The front wall 12 is located upstream in the flow direction of tap water, and the rear wall 13 is located downstream in the flow direction of tap water. Further, as shown in FIG. 3, a lid 9 for closing the upper opening 11A is provided at the upper end of the side wall 11 so as to be opened and closed. Inside the front wall 12 and the rear wall 13, a plurality of plate-shaped vertical ribs 12A for wall reinforcement protruding at the water meter M side at intervals along the left-right width direction orthogonal to the flow direction of tap water. , 13A are formed. The end faces 12a, 13a of the vertical ribs 12A, 13A on the water meter M side are configured to be inclined surfaces that are located closer to the water meter M side as they go upward.
底壁１０は、水道水の流れ方向上流側端部分と下流側端部分と略中央部分の３箇所に、他の部分よりも上面が低くなる第１凹部１０Ａ，第２凹部１０Ｂ，第３凹部１０Ｃを備えている。そして、３つの凹部１０Ａ，１０Ｂ，１０Ｃの厚みが同一の大きさに構成され、第１凹部１０Ａと第２凹部１０Ｂとの間の前側平坦部１０Ｄ及び第２凹部１０Ｂと第３凹部１０Ｃとの間の後側平坦部１０Ｅの厚みが、３つの凹部１０Ａ，１０Ｂ，１０Ｃの厚みよりも厚く（具体的には凹部１０Ａ，１０Ｂ，１０Ｃの厚みの２倍以上に）構成されている。このように構成することによって、ボックス５の重量増大を抑制しながらも、強度が必要となる部分の強度アップを図ることができる。 The bottom wall 10 has a first concave portion 10A, a second concave portion 10B, and a third concave portion whose upper surfaces are lower than those of other portions at three locations, namely, an upstream end portion, a downstream end portion, and a substantially central portion in the flow direction of tap water. Equipped with 10C. The three recesses 10A, 10B, and 10C are configured to have the same thickness, and the front flat portion 10D between the first recess 10A and the second recess 10B, the second recess 10B, and the third recess 10C are formed. The thickness of the rear flat portion 10E in between is thicker than the thickness of the three recesses 10A, 10B, 10C (specifically, at least twice the thickness of the recesses 10A, 10B, 10C). With such a configuration, it is possible to increase the strength of the portion requiring strength while suppressing the increase in weight of the box 5.
前壁１２の下端部における左右方向中央部に、本管１に接続される一次側給水管４を挿通可能な前側貫通孔１６が形成されている。また、後壁１３の下端部における左右方向中央部に、給水管用遮断弁７の流出側端が接続される二次側給水管８を挿通可能な後側貫通孔１７が形成されている。 A front through-hole 16 is formed in the center of the lower end of the front wall 12 in the left-right direction so that the primary side water supply pipe 4 connected to the main pipe 1 can be inserted therethrough. A rear side through hole 17 is formed in the center of the lower end of the rear wall 13 in the left-right direction so that the secondary side water supply pipe 8 to which the outflow side end of the water supply pipe cutoff valve 7 is connected can be inserted.
また、一次側給水管４と二次側給水管８とが同軸高さ位置となるように配置されている。このように配置することによって、一次側給水管４と二次側給水管８とが高さ方向で異なる位置に配置される場合に比べて、ボックス５内での高さ方向における収容空間を小さくすることができ、高さ方向におけるボックス５の小型化を図ることができる。更に、図３においては、一次側給水管４と水道用メータＭと二次側給水管８とが同軸高さ位置となるように配置されており、一次側給水管４から水道用メータＭを通って二次側給水管８へ流れる水道水に抵抗を与えることをできるだけ少なくできる利点もある。 Further, the primary side water supply pipe 4 and the secondary side water supply pipe 8 are arranged so as to be coaxial with each other. By arranging in this way, compared with the case where the primary side water supply pipe 4 and the secondary side water supply pipe 8 are arranged at different positions in the height direction, the accommodation space in the height direction in the box 5 is made smaller. It is possible to reduce the size of the box 5 in the height direction. Further, in FIG. 3, the primary side water supply pipe 4, the water meter M and the secondary side water supply pipe 8 are arranged at the same coaxial height position, and the primary side water supply pipe 4 is connected to the water meter M. There is also an advantage that resistance to the tap water flowing through to the secondary side water supply pipe 8 can be reduced as much as possible.
止水栓６は、内部に備える弁（図示せず）を手動で開閉操作する回転ハンドル１８を備えている。回転ハンドル１８を一方向に回転操作することにより一次側給水管４からの水道水が水道用メータＭ側へ流れることを阻止するように弁を閉じ操作できる。また、回転ハンドル１８を他方向に回転操作することにより一次側給水管４からの水道水が水道用メータＭ側へ流れるように弁を開放操作できる。 The water stopper 6 has a rotary handle 18 for manually opening and closing a valve (not shown) provided therein. By rotating the rotating handle 18 in one direction, the valve can be closed so as to prevent the tap water from the primary side water supply pipe 4 from flowing to the water meter M side. Further, by rotating the rotary handle 18 in the other direction, the valve can be opened so that the tap water from the primary side water supply pipe 4 flows to the water meter M side.
ボックス５の水道水の流れ方向上流側に配置される止水栓６と一次側給水管４とが継ぎ手１９により接続されている。また、止水栓６は、下部に備えた台座２０を介して底壁１０の前側平坦部１０Ｄに載置支持されている。この前側平坦部１０Ｄは、前述したように、３つの凹部１０Ａ，１０Ｂ，１０Ｃの厚みよりも厚くなっているので、止水栓６の重量で変形することがなく、止水栓６を良好に支持することができる。また、水道用メータＭの下面ＭＡが厚みのある後側平坦部１０Ｅに載置支持されているので、後側平坦部１０Ｅが、水道用メータＭの重量で変形することがなく、水道用メータＭを良好に支持することができる。 A water stopcock 6 arranged on the upstream side in the flow direction of the tap water of the box 5 and the primary side water supply pipe 4 are connected by a joint 19. Further, the water stopcock 6 is placed and supported on the front flat portion 10D of the bottom wall 10 via a pedestal 20 provided at a lower portion. Since the front flat portion 10D is thicker than the thickness of the three recesses 10A, 10B and 10C as described above, the front stopper 10D is not deformed by the weight of the water stopper 6 and the water stopper 6 can be satisfactorily formed. Can be supported. Further, since the lower surface MA of the water meter M is placed and supported on the thick rear flat portion 10E, the rear flat portion 10E is not deformed by the weight of the water meter M and the water meter is not deformed. M can be favorably supported.
水道用メータＭの水道水の流れ方向上流側端が、止水栓６の水道水の流れ方向下流側端に備える伸縮継ぎ手２１に接続されるとともに、水道用メータＭの水道水の流れ方向下手側端が、給水管用遮断弁７の水道水の流れ方向上流側端に備える継ぎ手２２に接続される。詳述すれば、水道用メータＭの水道水流れ方向両端の外面には、螺子部が形成されており、上流側の一方の螺子部に伸縮継ぎ手２１がねじ込まれて接続され、下流側の他方の螺子部に継ぎ手２２がねじ込まれて接続される。 The upstream end of the water meter M in the flow direction of the tap water is connected to the expansion joint 21 provided at the downstream end of the stopcock 6 in the flow direction of the tap water, and the lower end of the water meter M in the flow direction of the tap water. The side end is connected to the joint 22 provided at the upstream end of the water supply pipe cutoff valve 7 in the flow direction of tap water. More specifically, screw parts are formed on the outer surfaces of both ends of the water meter M in the tap water flow direction, and the expansion joint 21 is screwed into and connected to one screw part on the upstream side and the other on the downstream side. The joint 22 is screwed into and connected to the screw portion of the.
また、給水管用遮断弁７と二次側給水管８とが二次側給水管８の上流側端に備えた継ぎ手２３を介して接続されている。詳述すれば、給水管用遮断弁７の弁箱部２４の水道水流れ方向下流側端部の外面には、螺子部が形成されており、この螺子部に二次側給水管８の継ぎ手２３がねじ込まれて接続される。そして、水道用メータＭの水道水流れ方向下流側の螺子部及び給水管用遮断弁７の弁箱部２４の水道水流れ方向下流側端部の螺子部が、ボックス５の内部に位置していることから、一方の螺子部に継ぎ手２３をねじ込んで接続した後、他方の螺子部に継ぎ手２２をねじ込んで接続する作業がし易く、給水管用遮断弁７の取り付けを容易に行える利点がある。また、水道用メータＭは、ボックス５の後側平坦部１０Ｅに載置支持され、二次側給水管８は、上下方向に僅かに移動できるように浮いている状態であるため、給水管用遮断弁７の下流側端の継ぎ手２３を二次側給水管８にねじ込んで接続してから、固定状態の水道用メータＭの螺子部に位置合わせしながら、ねじ込んで接続することができ、給水管用遮断弁７の接続作業を迅速に行うことができる。 Further, the water supply pipe cutoff valve 7 and the secondary side water supply pipe 8 are connected via a joint 23 provided at an upstream end of the secondary side water supply pipe 8. More specifically, a screw part is formed on the outer surface of the downstream end of the valve box part 24 of the water supply pipe cutoff valve 7 in the tap water flow direction, and the joint 23 of the secondary side water supply pipe 8 is formed on this screw part. Are screwed in and connected. The screw portion of the water meter M on the downstream side in the tap water flow direction and the screw portion of the valve box portion 24 of the water supply pipe cutoff valve 7 on the downstream side in the tap water flow direction are located inside the box 5. Therefore, it is easy to connect the joint 23 by screwing the joint 23 into one screw portion and then screwing the joint 22 into the other screw portion, and there is an advantage that the water supply pipe cutoff valve 7 can be easily attached. Further, the water meter M is placed and supported on the rear flat portion 10E of the box 5, and the secondary side water supply pipe 8 is in a state of floating so as to be slightly movable in the vertical direction. After connecting the joint 23 at the downstream end of the valve 7 to the secondary side water supply pipe 8 by screwing, the screw 23 can be connected by screwing while aligning with the screw part of the water meter M in a fixed state. The work for connecting the shutoff valve 7 can be performed quickly.
給水管用遮断弁７は、図２〜図５に示すように、水道水の流れを遮断する弁体２８を内装し、流路を形成する配管に相当する弁箱部２４と、弁体２８に連結された弁軸２９を介して開放位置の弁体２８を閉じ位置へ操作する駆動機構２５が収納される駆動機構部３０と、閉じ位置へ操作された弁体２８を開放位置まで強制的に操作するための手動操作ハンドル２７とを備えている。 As shown in FIGS. 2 to 5, the water supply pipe shutoff valve 7 has a valve body 28 for shutting off the flow of tap water, and a valve box portion 24 corresponding to a pipe forming a flow path and a valve body 28. A drive mechanism unit 30 for accommodating a drive mechanism 25 for operating the valve body 28 in the open position to the closed position via the connected valve shaft 29, and the valve body 28 operated to the closed position are forced to the open position. A manual operation handle 27 for operation is provided.
駆動機構２５は、弁体２８を操作する動力伝達機構（図示せず）と電源供給機構（図示せず）とを備えている。動力伝達機構は、弁体２８を開放位置から閉じ位置へ操作する電動モータ（図示せず）と、電動モータに動力を伝達するギヤ機構（図示せず）とを備えている。電源供給機構は、地震により発生する所定の振動を検出する地震検知器（図示せず）と、地震検知器からの出力信号に基づいて電動モータへ電力の供給を行う電池等の電源部と、電動モータの駆動を制御する電子部品が実装された基板を有する制御部とを備えている。 The drive mechanism 25 includes a power transmission mechanism (not shown) that operates the valve body 28 and a power supply mechanism (not shown). The power transmission mechanism includes an electric motor (not shown) that operates the valve element 28 from the open position to the closed position, and a gear mechanism (not shown) that transmits power to the electric motor. The power supply mechanism is an earthquake detector (not shown) that detects a predetermined vibration generated by an earthquake, and a power supply unit such as a battery that supplies power to the electric motor based on an output signal from the earthquake detector, And a controller having a substrate on which electronic components for controlling the drive of the electric motor are mounted.
動力伝達機構のほとんどは、弁箱部２４とは異なる直方体形状の第１ケース２５Ｋに収納され、動力伝達機構の一部（動力を伝達するモータ）及び電源供給機構は、弁箱部２４及び第１ケース２５Ｋとは異なる直方体形状の第２ケース２６Ｋに収納されている。これら第１ケース２５Ｋと第２ケース２６Ｋとから、駆動機構部３０を構成している。電源供給機構は、水に弱い多数の電子部品を有しているため、図５に示すように、第２ケース２６Ｋの内側に更に第３ケース３１を備え、その第３ケース３１内に電源供給機構を収納している。また、第２ケース２６Ｋを第３ケース３１ごと、第１ケース２５Ｋにねじ込んで固定するためのネジ杆（図示せず）を第２ケース２６Ｋ内に備えている。このネジ杆の上端が、第２ケース２６Ｋの上端から上方へ突出している。そして、ネジ杆の突出端を覆う覆壁３２を第２ケース２６Ｋの上端に備えている。尚、覆壁３２の上端の開口部には、開口部を閉じるための取り外し可能なキャップ３３が嵌められている。 Most of the power transmission mechanism is housed in a first case 25K having a rectangular parallelepiped shape different from that of the valve box portion 24. A part of the power transmission mechanism (motor for transmitting power) and a power supply mechanism are provided in the valve box portion 24 and the first case 25K. It is housed in a second case 26K having a rectangular parallelepiped shape different from the one case 25K. The first case 25K and the second case 26K form a drive mechanism section 30. Since the power supply mechanism has a large number of electronic components that are weak against water, as shown in FIG. 5, a third case 31 is further provided inside the second case 26K, and the power is supplied into the third case 31. Contains the mechanism. Further, a screw rod (not shown) for screwing and fixing the second case 26K together with the third case 31 into the first case 25K is provided in the second case 26K. The upper end of this screw rod projects upward from the upper end of the second case 26K. A cover wall 32 that covers the protruding end of the screw rod is provided at the upper end of the second case 26K. A removable cap 33 for closing the opening is fitted in the opening at the upper end of the cover wall 32.
図２、図４及び図５に示すように、駆動機構部３０の厚み方向の寸法Ｄ１が左右幅方向の寸法Ｓ１よりも小さな寸法に構成され、駆動機構部３０の厚み方向が水道水の流れ方向に向くように、駆動機構部３０を弁箱部２４の上面２４ａに配置している。実際には、駆動機構部３０の厚み方向の寸法Ｄ１を左右幅方向の寸法Ｓ１の半分以下に構成している。また、駆動機構部３０の高さ方向（上下方向）の寸法Ｓ２が左右幅方向の寸法Ｓ１よりも小さな寸法に構成され、かつ、駆動機構部３０の高さ方向（縦方向）の寸法Ｓ２よりも厚み方向の寸法Ｄ１が小さな寸法に構成されている。 As shown in FIG. 2, FIG. 4 and FIG. 5, the dimension D1 in the thickness direction of the drive mechanism section 30 is configured to be smaller than the dimension S1 in the left-right width direction, and the thickness direction of the drive mechanism section 30 flows in the tap water flow. The drive mechanism portion 30 is arranged on the upper surface 24 a of the valve box portion 24 so as to face the direction. Actually, the dimension D1 in the thickness direction of the drive mechanism portion 30 is configured to be half or less of the dimension S1 in the lateral width direction. Further, the dimension S2 in the height direction (vertical direction) of the drive mechanism section 30 is configured to be smaller than the dimension S1 in the left-right width direction, and the dimension S2 in the height direction (vertical direction) of the drive mechanism section 30 is set. Also, the dimension D1 in the thickness direction is configured to be small.
実際には、給水管用遮断弁７における水道水の流れ方向の寸法、つまり駆動機構部３０の厚み方向の寸法Ｄ１を２００ｍｍ以内に設定している。更に詳述すれば、弁箱部２４の流入口の端面から流出口の端面までの寸法Ｌ１を、６８．５ｍｍに設定している。また、弁箱部２４の上方に配置した駆動機構部３０の厚み方向（図３では水道水の流れ方向）の第１寸法Ｄ１を、６７ｍｍに設定し、駆動機構部３０の厚み方向二次側給水管８側端面から弁箱部２４の流出口側端面までの第２寸法Ｄ２を、１３ｍｍに設定している。従って、水道水の流れ方向における給水管用遮断弁７の寸法が最大となる寸法、第１寸法Ｄ１＋第２寸法Ｄ２を、８０ｍｍに設定しており、２００ｍｍの半分よりも小さな寸法になっている。また、この給水管用遮断弁７の寸法に対して、ボックス５の水道水の流れ方向の内部寸法Ｌ２が、４６０ｍｍ（水道用メータＭの口径が２０ｍｍの場合）になっている。このボックス５の内部寸法Ｌ２は、水道用メータＭの口径寸法によって変更される。 Actually, the size of the water supply pipe cutoff valve 7 in the flow direction of the tap water, that is, the size D1 of the drive mechanism portion 30 in the thickness direction is set within 200 mm. More specifically, the dimension L1 from the end face of the inflow port to the end face of the outflow port of the valve box portion 24 is set to 68.5 mm. Further, the first dimension D1 in the thickness direction (the flow direction of tap water in FIG. 3) of the drive mechanism portion 30 arranged above the valve box portion 24 is set to 67 mm, and the drive mechanism portion 30 has a secondary side in the thickness direction. The second dimension D2 from the end surface on the water supply pipe 8 side to the end surface on the outlet side of the valve box portion 24 is set to 13 mm. Therefore, the dimension that maximizes the dimension of the water supply pipe cutoff valve 7 in the flow direction of the tap water, that is, the first dimension D1 + the second dimension D2, is set to 80 mm, which is smaller than half of 200 mm. Further, with respect to the size of the water supply pipe cutoff valve 7, the internal size L2 of the box 5 in the flow direction of the tap water is 460 mm (when the diameter of the water meter M is 20 mm). The internal dimension L2 of the box 5 is changed according to the diameter dimension of the water meter M.
例えば口径寸法が１３ｍｍの水道用メータＭ（水道水の流れ方向の寸法が１００ｍｍ）に対して３２０ｍｍの内部寸法のボックス５が用いられる。また、口径寸法が２０ｍｍの水道用メータＭ（水道水の流れ方向の寸法が１９０ｍｍ）及び口径寸法が２５ｍｍの水道用メータＭ（水道水の流れ方向の寸法が２２５ｍｍ）に対して４６０ｍｍの内部寸法のボックス５が用いられる。また、口径寸法が３０ｍｍの水道用メータＭ（水道水の流れ方向の寸法が２３０ｍｍ）及び口径寸法が４０ｍｍの水道用メータＭ（水道水の流れ方向の寸法が２４５ｍｍ）に対して５２０ｍｍの内部寸法のボックス５が用いられ、口径寸法が５０ｍｍの水道用メータＭ（水道水の流れ方向の寸法が４２０ｍｍ）に対して８５０ｍｍの内部寸法のボックス５が用いられる。また、口径寸法が７５ｍｍの水道用メータＭ（水道水の流れ方向の寸法が６３０ｍｍ）に対して１１００ｍｍの内部寸法のボックス５が用いられる。従って、ボックス５の内部寸法から各水道用メータＭの寸法を差し引いても２００ｍｍを超える寸法となるため、給水管用遮断弁７の寸法を２００ｍｍ以内に設定することによって、前記範囲となる３２０ｍｍ〜１１００ｍｍの範囲の内部寸法のボックス５であれば、水道用メータＭと給水管用遮断弁７をボックス５内に確実に収容することができる。このように、水道水の流れ方向における給水管用遮断弁の寸法を２００ｍｍ以内に設定することで、既存の水道用メータを収容するボックスが使用でき、専用ボックスを作るよりも資材費用を安くできる利点がある。因みに、内部寸法が、３２０ｍｍ〜１１００ｍｍの範囲のボックスは、左右幅寸法が、１７０ｍｍ〜６５０ｍｍの範囲で、高さ寸法が１８０ｍｍ〜６５０ｍｍの範囲となる。 For example, a box 5 having an internal size of 320 mm is used for a water meter M having a diameter of 13 mm (the size of the tap water in the flow direction is 100 mm). In addition, an internal dimension of 460 mm with respect to a water meter M having a diameter of 20 mm (the size of the tap water in the flow direction is 190 mm) and a meter M of the water having a diameter of 25 mm (the size of the flow direction of the tap water is 225 mm). Box 5 of is used. In addition, an internal dimension of 520 mm with respect to a water meter M having a diameter of 30 mm (dimension in the flowing direction of tap water is 230 mm) and a meter M for water having a diameter of 40 mm (dimension in the flowing direction of tap water is 245 mm) The box 5 is used, and the box 5 having an inner size of 850 mm is used for the water meter M having a diameter of 50 mm (the size in the flow direction of the tap water is 420 mm). Further, the box 5 having an internal size of 1100 mm is used for the water meter M having a diameter of 75 mm (the size of the tap water in the flow direction is 630 mm). Therefore, even if the size of each water meter M is subtracted from the internal size of the box 5, the size is more than 200 mm. Therefore, by setting the size of the water pipe shutoff valve 7 to within 200 mm, the range is 320 mm to 1100 mm. With the box 5 having an internal size in the range of 5, the water meter M and the water supply pipe cutoff valve 7 can be reliably accommodated in the box 5. In this way, by setting the size of the shutoff valve for the water supply pipe in the flow direction of tap water to within 200 mm, the box that accommodates the existing water meter can be used, and the material cost can be reduced compared to making a dedicated box. There is. By the way, a box having an internal dimension of 320 mm to 1100 mm has a left-right width dimension of 170 mm to 650 mm and a height dimension of 180 mm to 650 mm.
また、図４に示すように、駆動機構部３０の水道水の流れ方向における中心位置Ｃ１が、弁箱部２４の水道水の流れ方向における中心位置Ｃ２に対して水道用メータＭ側に位置ずれている。このずれ量としては、実際には１３ｍｍに設定しているが、どのような値に設定してもよい。このようにボックス５の端に位置する二次側給水管８に給水管用遮断弁７を接続する際に、ボックス５の二次側給水管８側の端から駆動機構部３０を少しでも遠ざけることができ、接続作業を容易に行うことができる。また、第２ケース２６Ｋの二次側給水管８側の端面２６Ｔを上方に向うほど水道用メータＭ側に位置する傾斜面に構成していることによって、図３に示すように、ボックス５の縦リブ１３Ａから更に遠ざけることができる。 Further, as shown in FIG. 4, the center position C1 of the drive mechanism portion 30 in the direction of tap water flow is displaced from the center position C2 of the valve box portion 24 in the direction of tap water flow toward the water meter M side. ing. The amount of deviation is actually set to 13 mm, but it may be set to any value. When connecting the water supply pipe cutoff valve 7 to the secondary water supply pipe 8 located at the end of the box 5 as described above, the drive mechanism unit 30 should be kept away from the end of the box 5 on the secondary water supply pipe 8 side as much as possible. The connection work can be performed easily. Further, as the end surface 26T of the second case 26K on the secondary water supply pipe 8 side is configured to be an inclined surface located on the water meter M side as it goes upward, as shown in FIG. It can be further separated from the vertical rib 13A.
また、給水管用遮断弁７は、その下面、具体的には弁箱部２４の下面２４Ａが、水道用メータＭの下面ＭＡよりも上方に位置するように配置されている。従って、給水管用遮断弁７を取り付ける際に、給水管用遮断弁７の下面２４Ａがボックス５の底部である底壁１０の上面に当接することがなく、取り付け作業を確実に、かつ容易に行うことができる。具体的には、図２に示すように、ボックス５の底壁１０の凹部１０Ｃの上面１０Ｕが、水道用メータＭの下面ＭＡが当接している後側平坦部１０Ｅよりも下方に位置しているため、弁箱部２４の下面２４Ａとボックス５の凹部１０Ｃの上面１０Ｕとの距離を大きく確保することができ、給水管用遮断弁７の取り付け作業をより一層容易に行うことができる利点がある。 Further, the water supply pipe cutoff valve 7 is arranged such that its lower surface, specifically, the lower surface 24A of the valve box portion 24 is located above the lower surface MA of the water meter M. Therefore, when the water supply pipe cutoff valve 7 is attached, the lower surface 24A of the water supply pipe cutoff valve 7 does not come into contact with the upper surface of the bottom wall 10 which is the bottom of the box 5, so that the attachment work can be performed reliably and easily. You can Specifically, as shown in FIG. 2, the upper surface 10U of the recess 10C of the bottom wall 10 of the box 5 is located below the rear flat portion 10E with which the lower surface MA of the water meter M is in contact. Therefore, it is possible to secure a large distance between the lower surface 24A of the valve box portion 24 and the upper surface 10U of the recess 10C of the box 5, and there is an advantage that the work of mounting the water supply pipe cutoff valve 7 can be performed more easily. .
前記のように構成された給水管用遮断弁７について説明すれば、地震により所定の大きさの振動が発生して地震検知器が検知すると、制御部は、駆動機構２５に駆動信号を出力する。すると、給水管用遮断弁７の弁が閉じることによって、水道水の流れを遮断し、断水となる。自治体の職員は、遮断後に本管１の復旧を行う前に、本管１の水圧検査を行う。このとき、水圧が本管１から一次側給水管４（水道用メータＭ）までの間に加わる。これによって、本管１又は一次側給水管４あるいはそれら両方の良否（損傷しているか否か）を直ちに確認することができる。尚、水圧検査は、所定の水圧を加えて所定時間経過しても所定圧よりも低い圧力である場合に、不合格と判断し、所定の水圧を加えて所定時間経過しても所定圧を維持している場合には、合格と判断する。または、上流側から通水し管内を満水にし、水の流れが止まらなければ不合格と判断し、止まれば合格と判断してもよい。 Explaining the water supply pipe cutoff valve 7 configured as described above, when a vibration of a predetermined magnitude occurs due to an earthquake and the earthquake detector detects it, the control unit outputs a drive signal to the drive mechanism 25. Then, by closing the valve of the water supply pipe cutoff valve 7, the flow of tap water is cut off, and the water is cut off. The staff of the local government conducts a water pressure inspection of the main pipe 1 before restoring the main pipe 1 after the interruption. At this time, water pressure is applied between the main pipe 1 and the primary side water supply pipe 4 (water meter M). As a result, it is possible to immediately check the quality of the main pipe 1, the primary water supply pipe 4, or both (whether or not they are damaged). In the water pressure test, if the pressure is lower than the predetermined pressure even after a predetermined time has passed after the predetermined water pressure is applied, it is judged as a failure, and the predetermined pressure is applied even after the predetermined time has been elapsed by adding the predetermined water pressure. If it is maintained, it is judged to pass. Alternatively, water may be passed from the upstream side to fill the pipe with water, and if the flow of water does not stop, it may be determined as a failure, and if it stops, it may be determined as a pass.
即ち、水圧検査結果が合格である場合には、本管１から一次側給水管４（水道用メータＭ）までの間には、管の破損がなく良好であることを確認できる。また、水圧検査結果が不合格である場合には、本管１から一次側給水管４までの間には、管の破損があり不良であることを確認できる。尚、水圧検査結果が合格である場合に、二次側給水管８（需要者宅内の給水管）側の良否を確認したい場合には、二次側給水管８に水圧を加えて水圧検査を行うことによって確認できる。 That is, when the water pressure inspection result is acceptable, it can be confirmed that there is no breakage of the pipe between the main pipe 1 and the primary side water supply pipe 4 (water meter M), and it can be confirmed. Further, when the result of the water pressure inspection is unacceptable, it can be confirmed that the pipe is damaged between the main pipe 1 and the primary side water supply pipe 4 and is defective. If the water pressure inspection result is acceptable and if you want to check the quality of the secondary water supply pipe 8 (water supply pipe in the customer's house), apply water pressure to the secondary water supply pipe 8 and perform a water pressure inspection. You can check by doing.
尚、本発明は、上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更が可能である。 The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
例えば、前記実施形態では、水道用メータＭと二次側給水管８との間に給水管用遮断弁７を設けたが、一次側給水管４と水道用メータＭとの間に給水管用遮断弁７を設けてもよい。 For example, in the above embodiment, the water supply pipe cutoff valve 7 is provided between the water meter M and the secondary side water supply pipe 8, but the water supply pipe cutoff valve is provided between the primary side water supply pipe 4 and the water meter M. 7 may be provided.
また、前記実施形態では、止水栓６を設けたが、省略してもよい。この場合、給水管用遮断弁７を地震時以外の何時でも止水することができるように開放位置から閉じ位置へ操作できる構成にしておくことが好ましい。この給水管用遮断弁７の開放位置から閉じ位置への操作は、電動力又は手動操作力を用いることになる。 Further, although the water shutoff plug 6 is provided in the above embodiment, it may be omitted. In this case, it is preferable that the water supply pipe cutoff valve 7 be operated from the open position to the closed position so that the water can be stopped at any time other than during an earthquake. To operate the water supply pipe cutoff valve 7 from the open position to the closed position, electric power or manual operation force is used.
また、前記実施形態では、給水管用遮断弁７をバッテリや電池等の電力を用いて駆動機構２５を駆動して開放位置から閉じ位置へ切り替えるように電動式に構成したが、渦巻きバネからなるゼンマイ式に構成してもよい。 Further, in the above-described embodiment, the water supply pipe cutoff valve 7 is electrically driven so that the drive mechanism 25 is driven by using the electric power of the battery or the battery to switch from the open position to the closed position. You may comprise in a formula.
また、前記実施形態では、給水管用遮断弁７を、それの下面２４Ａが水道用メータＭの下面ＭＡよりも上方に位置するように配置したが、給水管用遮断弁７の下面２４Ａが、ボックス５の底壁１０の上面に当たることがないように、給水管用遮断弁７の下面２４Ａに相当する底壁１０の上面を下方へ位置させることによって、給水管用遮断弁７を、それの下面２４Ａが水道用メータＭの下面ＭＡと同じ位置又は水道用メータＭの下面ＭＡよりも下方に位置するように配置することもできる。 Further, in the above embodiment, the water supply pipe cutoff valve 7 is arranged such that the lower surface 24A thereof is located above the lower surface MA of the water meter M, but the lower surface 24A of the water supply pipe cutoff valve 7 is the box 5 By locating the upper surface of the bottom wall 10 corresponding to the lower surface 24A of the water supply pipe cutoff valve 7 downward so that it does not hit the upper surface of the bottom wall 10, It can also be arranged so as to be located at the same position as the lower surface MA of the water meter M or below the lower surface MA of the water meter M.
また、前記実施形態では、一次側給水管４と二次側給水管８とを同軸高さ位置となるように配置したが、両方の給水管４．８を高さが異なるように配置してもよい。 Moreover, in the said embodiment, although the primary side water supply pipe 4 and the secondary side water supply pipe 8 were arrange | positioned so that it might become a coaxial height position, both water supply pipes 4.8 are arrange | positioned so that height may differ. Good.
また、前記実施形態では、平面視において矩形状のボックス５を設けたが、楕円状、小判状、台形状、円形状、多角形状等、どのような形状のボックス５であってもよい。 Further, although the rectangular box 5 is provided in the plan view in the above embodiment, the box 5 may have any shape such as an elliptical shape, an oval shape, a trapezoidal shape, a circular shape, or a polygonal shape.
また、前記実施形態では、弁体２８を開放位置まで強制的に操作するための手動操作ハンドル２７を設けたが、省略して、弁体２８を開放位置まで動力を用いて操作する電動モータや電磁ソレノイド等のアクチュエータを設けて実施することになる。また、図５では、左右幅方向の寸法Ｓ１や高さ方向（縦方向）の寸法Ｓ２を、手動操作ハンドル２７を含めず、第２ケース２６Ｋの左右幅方向の寸法や第１ケース２５Ｋと第２ケース２６Ｋの寸法のみとしたが、手動操作ハンドル２７の寸法も含めた寸法としてもよい。このように、手動操作ハンドル２７の寸法も含めた左右幅方向の寸法Ｓ１や高さ方向（縦方向）の寸法Ｓ２とした場合でも、給水管用遮断弁７をボックス内に収容することができる。 Further, in the above-described embodiment, the manual operation handle 27 for forcibly operating the valve body 28 to the open position is provided, but it is omitted, and an electric motor for operating the valve body 28 to the open position using power is used. It will be implemented by providing an actuator such as an electromagnetic solenoid. In addition, in FIG. 5, the dimension S1 in the left-right width direction and the dimension S2 in the height direction (vertical direction) are not included in the manual operation handle 27, and the dimension in the left-right width direction of the second case 26K and the first case 25K and the first case 25K. Although only the size of the two cases 26K is used, the size may include the size of the manual operation handle 27. As described above, even when the dimension S1 in the left-right width direction and the dimension S2 in the height direction (vertical direction) including the dimension of the manual operation handle 27 are set, the water supply pipe cutoff valve 7 can be housed in the box.
また、前記実施形態では、給水管用遮断弁７を、弁箱部２４と駆動機構部３０とを別々の部分から構成したが、一体化して１つの部分から構成してもよい。また、駆動機構部３０を、弁箱部２４の上面２４ａに配置した第１ケース２５Ｋと、第１ケース２５Ｋの上面に配置した第２ケース２６Ｋの２つのケースから構成したが、図６に示すように、１つの（図６では、直方体状になっているが、どのような形状であってもよい）ケース３４から構成されていてもよい。このケース３４の厚み方向の寸法Ｄ１、左右幅方向の寸法Ｓ１、高さ方向の寸法Ｓ２は、前記実施形態と同様に、Ｄ１＜Ｓ２＜Ｓ１に設定されている。図に示す２４Ｋは、弁箱部２４に形成した流入口である。また、図６では、弁箱部２４の上面２４ａに、駆動機構部３０を配置したが、図７に示すように、弁箱部２４の横一側（左右幅方向左側又は右側）に駆動機構部３０を収納するケース３５を駆動機構部３０の厚み方向が水道水の流れ方向に向くように配置してもよい。このケース３５の厚み方向の寸法Ｄ１、左右幅方向の寸法Ｓ１、高さ方向の寸法Ｓ２は、前記実施形態と同様に、Ｄ１＜Ｓ２＜Ｓ１に設定されている。また、弁箱部２４の横一側（左右幅方向左側又は右側）に弁箱部２４と略同一高さに構成された第１ケースと第１ケース及び弁箱部２４上に跨る第２ケースとから駆動機構部３０を構成してもよい。 Further, in the above-described embodiment, the water supply pipe cutoff valve 7 has the valve box portion 24 and the drive mechanism portion 30 which are separate parts, but may be integrally formed with one part. Further, the drive mechanism unit 30 is composed of two cases, that is, a first case 25K arranged on the upper surface 24a of the valve box portion 24 and a second case 26K arranged on the upper surface of the first case 25K. As described above, the case 34 may have a single shape (in FIG. 6, the shape is a rectangular parallelepiped, but may have any shape). The dimension D1 in the thickness direction, the dimension S1 in the left-right width direction, and the dimension S2 in the height direction of the case 34 are set to D1 <S2 <S1 as in the above embodiment. 24K shown in the figure is an inlet formed in the valve box portion 24. Further, in FIG. 6, the drive mechanism unit 30 is arranged on the upper surface 24a of the valve box unit 24, but as shown in FIG. 7, the drive mechanism unit is provided on one lateral side of the valve box unit 24 (left or right in the left-right width direction). The case 35 accommodating the part 30 may be arranged so that the thickness direction of the drive mechanism part 30 faces the flow direction of tap water. The dimension D1 in the thickness direction, the dimension S1 in the left-right width direction, and the dimension S2 in the height direction of the case 35 are set to D1 <S2 <S1 as in the above embodiment. In addition, a first case and a first case that are formed at substantially the same height as the valve box portion 24 on one lateral side (left or right in the left-right width direction) of the valve box portion 24 and a second case that extends over the valve box portion 24. The drive mechanism unit 30 may be configured by
また、前記実施形態では、給水管用遮断弁７の端部に螺子部を設けて継手に接続したが、フランジを設けて接続したり、筒状部を設けて嵌合し止め輪やクリップ状部品やビスなどで接続してもよい。 Further, in the above-described embodiment, the screw portion is provided at the end portion of the water supply pipe cutoff valve 7 to connect to the joint, but a flange is provided for connection, or a tubular portion is provided for fitting to provide a retaining ring or a clip-shaped component. You may connect with a screw or the like.
そして、前記実施形態の給水管構造は、本管に接続される一次側給水管と、前記一次側給水管の水道水の流出側端部に接続される水道用メータの水道水の流出側端部に接続される二次側給水管と、前記一次側給水管と前記水道用メータとの間又は前記水道用メータと前記二次側給水管との間に配置され、地震により発生する所定の大きさの振動により作動して水道水の流れを遮断する給水管用遮断弁と、該給水管用遮断弁及び前記水道用メータを収容可能なボックスと、を設けていてもよい。 And, the water supply pipe structure of the embodiment, the primary side water supply pipe connected to the main, and the outlet side end of the tap water of the water meter connected to the outlet side end of the tap water of the primary side water supply pipe. The secondary side water supply pipe connected to the section, between the primary side water supply pipe and the water supply meter or between the water supply meter and the secondary side water supply pipe, a predetermined occurrence caused by an earthquake There may be provided a water supply pipe shutoff valve that operates by a vibration of a magnitude to shut off the flow of tap water, and a box that can accommodate the water supply pipe shutoff valve and the water meter.
この構成によれば、地震により所定の大きさの振動が発生すると、給水管用遮断弁が水道水の流れを遮断し、二次側給水管への水道水の供給が停止する。
この状態で、本管から一次側給水管へ通水して、本管から一次側給水管までの間の水圧検査を行うことができる。水圧検査の結果が合格であれば、本管及び一次側給水管が良好であることがわかる。また、水圧検査結果が不合格であれば、本管又は一次側給水管あるいはそれら両方が不良である（例えば破損している）ことがわかる。また、二次側給水管へ通水して水圧検査を行うことによって、二次側給水管の良否（例えば破損しているか否か）がわかる。
According to this configuration, when a predetermined amount of vibration occurs due to an earthquake, the water supply pipe shutoff valve shuts off the flow of tap water, and the supply of tap water to the secondary water supply pipe is stopped.
In this state, water can be passed from the main pipe to the primary side water supply pipe to perform a water pressure test between the main pipe and the primary side water supply pipe. If the result of the water pressure test passes, it can be seen that the main pipe and the primary side water supply pipe are good. Further, if the water pressure inspection result is unacceptable, it can be understood that the main pipe, the primary side water supply pipe, or both of them are defective (for example, damaged). Further, by passing water through the secondary side water supply pipe and performing a water pressure inspection, it is possible to know whether the secondary side water supply pipe is good or bad (for example, whether or not it is damaged).
また、前記実施形態の給水管構造は、前記給水管用遮断弁を、その下面が前記水道用メータの下面よりも上方に位置するように配置していてもよい。 Further, in the water supply pipe structure of the above-described embodiment, the water supply pipe cutoff valve may be arranged such that the lower surface thereof is located above the lower surface of the water meter.
上記のように、給水管用遮断弁を、その下面が前記水道用メータの下面よりも上方に位置するように配置しておけば、給水管用遮断弁を取り付ける際に、給水管用遮断弁の下面がボックスの底部の上面に当接することがなく、取り付け作業を確実に、かつ容易に行うことができる。 As described above, by arranging the water supply pipe cutoff valve so that the lower surface thereof is located above the lower surface of the water meter, the lower surface of the water supply pipe cutoff valve is attached when the water supply pipe cutoff valve is attached. The attachment work can be performed reliably and easily without contacting the upper surface of the bottom of the box.
また、前記実施形態の給水管構造は、前記一次側給水管と前記二次側給水管とが同軸高さ位置となるように配置されていてもよい。 Moreover, the water supply pipe structure of the said embodiment may be arrange | positioned so that the said primary side water supply pipe and the said secondary side water supply pipe may become a coaxial height position.
上記のように、一次側給水管と二次側給水管とを同軸高さ位置となるように配置しておけば、一次側給水管と二次側給水管とを高さ方向で異なる位置に配置する場合に比べて、ボックス内での高さ方向における収容空間を小さくすることができ、高さ方向におけるボックスの小型化を図ることができる。 As described above, if the primary side water supply pipe and the secondary side water supply pipe are arranged so as to be at the coaxial height position, the primary side water supply pipe and the secondary side water supply pipe will be at different positions in the height direction. As compared with the case where the boxes are arranged, the accommodation space in the height direction in the box can be made smaller, and the box can be made smaller in the height direction.
また、前記実施形態の給水管構造は、前記一次側給水管と前記水道用メータとの間に水道水の流れを止めるための止水栓が配置され、前記水道用メータと前記二次側給水管との間に前記給水管用遮断弁が配置されていてもよい。 Further, in the water supply pipe structure of the embodiment, a water stopcock for stopping the flow of tap water is arranged between the primary side water supply pipe and the water meter, and the water meter and the secondary water supply are provided. The water supply pipe cutoff valve may be arranged between the pipe and the pipe.
また、前記実施形態の給水管構造は、前記給水管用遮断弁における水道水の流れ方向の寸法を２００ｍｍ以内に設定していることが好ましい。 Further, in the water supply pipe structure of the above-described embodiment, it is preferable that the size of the cutoff valve for the water supply pipe in the flow direction of the tap water is set within 200 mm.
上記のように、給水管用遮断弁における水道水の流れ方向の寸法を２００ｍｍ以内に設定しておけば、既存の水道用メータを収容するボックス内に水道用メータと給水管用遮断弁の双方を収容することが可能になる。 As described above, if the size of the cutoff valve for the water supply pipe in the flow direction of the tap water is set within 200 mm, both the water meter and the cutoff valve for the water supply pipe are housed in the box that houses the existing water meter. It becomes possible to do.
また、前記実施形態の給水管構造は、前記給水管用遮断弁が、電動弁からなり、前記電動弁が、水道水の流れを遮断する弁体を備える弁箱部と、前記弁体に連結された弁軸を介して該弁体を前記弁箱部内で開閉操作させる駆動機構が収納される駆動機構部とを備え、前記駆動機構部の厚み方向の寸法が左右幅方向の寸法よりも小さな寸法に構成され、前記駆動機構部の厚み方向が水道水の流れ方向に向くように、該駆動機構部を前記弁箱部の上方に配置していてもよい。 Further, in the water supply pipe structure of the embodiment, the water supply pipe cutoff valve is an electrically operated valve, and the electrically operated valve is connected to the valve body including a valve body for cutting off the flow of tap water, and the valve body. And a drive mechanism section for accommodating a drive mechanism for opening and closing the valve body in the valve box section via a valve shaft, the dimension of the drive mechanism section in the thickness direction being smaller than the dimension in the left-right width direction. The drive mechanism portion may be arranged above the valve box portion such that the thickness direction of the drive mechanism portion is oriented in the flow direction of tap water.
上記のように、左右幅方向の寸法よりも小さな寸法に構成されている駆動機構部の厚み方向が水道水の流れ方向に向くように、駆動機構部を弁箱部の上方に配置しておけば、水道水の流れ方向における駆動機構部のスペースを小さく抑えることができ、給水管用遮断弁をボックス内に収容し易くなる。 As described above, the drive mechanism section should be arranged above the valve box so that the thickness direction of the drive mechanism section, which is smaller than the dimension in the left-right width direction, faces the direction of tap water flow. In this case, the space of the drive mechanism in the flow direction of the tap water can be kept small, and the shutoff valve for the water supply pipe can be easily housed in the box.
また、前記実施形態の給水管構造は、前記給水管用遮断弁が、電動弁からなり、前記電動弁が、水道水の流れを遮断する弁体を備える弁箱部と、前記弁体に連結された弁軸を介して該弁体を前記弁箱部内で開閉操作させる駆動機構が収納される駆動機構部とを備え、前記駆動機構部の厚み方向の寸法が左右幅方向の寸法よりも小さな寸法に構成され、前記駆動機構部の厚み方向が水道水の流れ方向に向くように、該駆動機構部を前記弁箱部の横一側に配置していてもよい。 Further, in the water supply pipe structure of the embodiment, the water supply pipe cutoff valve is an electrically operated valve, and the electrically operated valve is connected to the valve body including a valve body for cutting off the flow of tap water, and the valve body. And a drive mechanism section for accommodating a drive mechanism for opening and closing the valve body in the valve box section via a valve shaft, the dimension of the drive mechanism section in the thickness direction being smaller than the dimension in the left-right width direction. The drive mechanism portion may be disposed on one lateral side of the valve box portion so that the thickness direction of the drive mechanism portion is oriented in the flow direction of tap water.
上記のように、左右幅方向の寸法よりも小さな寸法に構成されている駆動機構部の厚み方向が水道水の流れ方向に向くように、駆動機構部を弁箱部の横一側に配置しておけば、水道水の流れ方向における駆動機構部のスペースを小さく抑えることができ、給水管用遮断弁をボックス内に収容し易くなる。 As described above, the drive mechanism is arranged on one lateral side of the valve box so that the thickness direction of the drive mechanism, which is configured to be smaller than the dimension in the left-right width direction, is oriented in the flow direction of tap water. By doing so, the space of the drive mechanism portion in the direction of tap water flow can be kept small, and the shutoff valve for the water supply pipe can be easily housed in the box.
また、前記実施形態の給水管構造は、前記駆動機構部の水道水の流れ方向における中心位置が、前記弁箱部に対して前記水道用メータ側にずれていてもよい。 Further, in the water supply pipe structure of the embodiment, the center position of the drive mechanism portion in the flow direction of tap water may be displaced toward the water meter side with respect to the valve box portion.
上記のように、駆動機構部の水道水の流れ方向における中心位置が、弁箱部に対して水道用メータ側にずれていれば、ボックスの端に位置する一次側給水管又は二次側給水管に給水管用遮断弁を接続する際に、ボックスの端から駆動機構部を少しでも遠ざけることができ、接続作業を容易に行うことができる。 As described above, if the center position of the drive mechanism in the flow direction of tap water is deviated to the water meter side with respect to the valve box part, the primary side water supply pipe or the secondary side water supply located at the end of the box When connecting the shutoff valve for the water supply pipe to the pipe, the drive mechanism can be moved away from the end of the box as much as possible, and the connection work can be easily performed.
１…本管、２…遮断弁、２Ａ…手動式の仕切弁、３…給水管構造、４…一次側給水管、５…ボックス、６…止水栓、７…給水管用遮断弁、８…二次側給水管、９…蓋、１０…底壁、１０Ａ，１０Ｂ，１０Ｃ…凹部、１０Ｄ…前側平坦部、１０Ｅ…後側平坦部、１０Ｕ…上面、１１…側壁、１１Ａ…上方開口、１２…前壁、１２Ａ，１３Ａ…縦リブ、１２ａ，１３ａ…端面、１３…後壁、１４…左側壁、１５…右側壁、１６…前側貫通孔、１７…後側貫通孔、１８…回転ハンドル、１９…継ぎ手、２０…台座、２１，２２，２３…継ぎ手、２４…弁箱部、２４Ａ…下面、２４Ａ…下面、２５…駆動機構、２５Ｋ…第１ケース、２６Ｋ…第２ケース、２６Ｔ…端面、２７…手動操作ハンドル、２８…弁体、２９…弁軸、３０…駆動機構部、３１…第３ケース、３２…覆壁、３３…キャップ、Ｄ１…厚み方向の寸法、Ｈ…需要者宅、Ｌ１…寸法、Ｍ…水道用メータ、ＭＡ…下面、Ｓ１…左右幅方向の寸法、Ｓ２…高さ方向の寸法 DESCRIPTION OF SYMBOLS 1 ... Main pipe, 2 ... Shutoff valve, 2A ... Manual gate valve, 3 ... Water supply pipe structure, 4 ... Primary side water supply pipe, 5 ... Box, 6 ... Stopcock, 7 ... Water supply pipe shutoff valve, 8 ... Secondary side water supply pipe, 9 ... Lid, 10 ... Bottom wall, 10A, 10B, 10C ... Recessed portion, 10D ... Front flat portion, 10E ... Rear flat portion, 10U ... Top surface, 11 ... Side wall, 11A ... Upper opening, 12 ... front wall, 12A, 13A ... vertical ribs, 12a, 13a ... end face, 13 ... rear wall, 14 ... left side wall, 15 ... right side wall, 16 ... front through hole, 17 ... rear through hole, 18 ... rotary handle, 19 ... Joint, 20 ... Pedestal 21, 22, 23 ... Joint, 24 ... Valve box part, 24A ... Lower surface, 24A ... Lower surface, 25 ... Driving mechanism, 25K ... 1st case, 26K ... 2nd case, 26T ... End surface , 27 ... Manual operation handle, 28 ... Valve body, 29 ... Valve shaft, 30 ... Drive mechanism section, 31 ... 3 cases, 32 ... cover wall, 33 ... cap, D1 ... thickness direction dimension, H ... consumer house, L1 ... dimension, M ... water meter, MA ... bottom surface, S1 ... left / right width direction dimension, S2 ... height Direction dimension
Claims (4)
前記一次側給水管の水道水の流出側端部に接続される水道用メータの水道水の流出側端部に接続される二次側給水管と、
前記一次側給水管と前記水道用メータとの間又は前記水道用メータと前記二次側給水管との間に配置され、地震検知器を収納し、地震により発生する所定の大きさの振動を前記地震検知器が検出することで作動して水道水の流れを遮断する給水管用遮断弁と、
該給水管用遮断弁及び前記水道用メータを収容可能であり地中に埋設されるボックスと、
を設け、
前記給水管用遮断弁は電動弁からなり、該電動弁は、水道水の流れを遮断する弁体を備える弁箱部と、前記弁体に連結された弁軸を介して該弁体を前記弁箱部内で開閉操作させる駆動機構が収納される駆動機構部とを備え、
前記弁箱部の水道水の流れ方向における中心位置が、前記弁軸に対して前記水道用メータ側にずれており、
前記駆動機構部の水道水の流れ方向における中心位置が、前記弁箱部における前記中心位置に対して前記水道用メータ側にずれていることを特徴とする給水管構造。 A primary side water supply pipe connected to the main pipe,
A secondary side water supply pipe connected to the outlet side end of the tap water of the water meter connected to the outlet side end of the tap water of the primary side water supply pipe,
It is arranged between the primary side water supply pipe and the water supply meter or between the water supply meter and the secondary side water supply pipe, houses an earthquake detector, and generates a vibration of a predetermined magnitude generated by an earthquake. A shutoff valve for a water supply pipe that operates by detecting the earthquake detector to shut off the flow of tap water,
A box that can house the shutoff valve for the water supply pipe and the water meter and is buried in the ground;
The provided
The shutoff valve for the water supply pipe comprises an electrically operated valve, and the electrically operated valve includes a valve box portion having a valve body for shutting off the flow of tap water, and the valve body which is connected to the valve body via a valve shaft connected to the valve body. And a drive mechanism section for storing a drive mechanism for opening and closing the inside of the box section,
The center position in the flow direction of tap water of the valve box portion is displaced toward the water meter side with respect to the valve shaft,
A water supply pipe structure , wherein a center position of the drive mechanism portion in a flow direction of tap water is deviated toward the water meter side with respect to the center position of the valve box portion .
前記水道用メータは、水道水の流れ方向下手側端に螺子部を備え、
前記継ぎ手は、前記水道用メータの前記螺子部にねじ込まれて接続されることを特徴とする請求項１に記載の給水管構造。 The water supply pipe cutoff valve is arranged between the water meter and the secondary side water supply pipe, and is provided with a joint at an upstream side end in the flow direction of tap water,
The water meter is provided with a screw portion at the lower end in the flow direction of tap water,
The water supply pipe structure according to claim 1, wherein the joint is screwed into and connected to the screw portion of the water meter.
前記複数の縦リブの各々における前記水道用メータ側の端面は、上方に向うほど水道用メータ側に位置する傾斜面であり、
前記駆動機構を収納するケースは、水道水の流れ方向下流側の端面につき、上方に向うほど水道用メータ側に位置する傾斜面を備えることを特徴とする請求項１又は２に記載の給水管構造。 Before SL box is formed on the inside of the side wall located on the side wall and the flow direction downstream side of the tap water is positioned in the flow direction upstream side of the tap water, comprising a plurality of longitudinal ribs projecting into the water for meter side,
The end face on the water meter side in each of the plurality of vertical ribs is an inclined surface positioned on the water meter side as it goes upward,
The water supply pipe according to claim 1 or 2 , wherein the case accommodating the drive mechanism is provided with an inclined surface located on a downstream end in a flow direction of tap water and located closer to a water meter as it goes upward. Construction.
前記給水管用遮断弁は、前記止水栓よりも高い位置に配置されている、請求項１〜３のうちのいずれか１項に記載の給水管構造。 A water stopper for stopping the flow of tap water is arranged between the primary side water supply pipe and the water meter,
The water supply pipe shut-off valve is disposed at a position higher than the stop cock, water supply pipe structure according to any one of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018215739A JP6686105B2 (en) | 2018-11-16 | 2018-11-16 | Water pipe structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018215739A JP6686105B2 (en) | 2018-11-16 | 2018-11-16 | Water pipe structure |
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| JP7097425B2 (en) * | 2020-11-27 | 2022-07-07 | 有限会社樋口水道 | Temporary faucet and its water supply temporary construction method |
| JP7507713B2 (en) | 2021-03-22 | 2024-06-28 | 株式会社栗本鐵工所 | How to operate the automatic drainage device |
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| JP2001289343A (en) * | 2000-04-05 | 2001-10-19 | Hitachi Valve Ltd | Emergency cutoff valve and emergency cutoff valve group |
| JP2001289347A (en) * | 2000-04-06 | 2001-10-19 | Toyo Autom Kk | Emergency cutoff valve with service water supply mechanism for water reservoir in emergency of earthquake |
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