JP6463896B2 - Water supply pipe structure - Google Patents

Description

  The present invention relates to a water supply pipe structure configured to accommodate a water meter in a box.

  In such a water supply pipe structure, a main pipe for flowing tap water from a distribution reservoir is provided, and a main shut-off valve for cutting off the flow of tap water in the event of an earthquake is provided upstream of the main pipe. (For example, refer to Patent Document 1).

  In addition, a plurality of manually operated gate valves are provided at a predetermined interval in the main pipe downstream of the main pipe shut-off 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 gate valve or between two gate valves adjacent in the tap water flow direction. The water supply pipe structure includes a primary side water supply pipe connected to the main pipe via a water faucet, a stop cock connected to an outlet side end of tap water of the primary side water supply pipe, and a water tap of the stop cock. A box that can accommodate a water meter at the end of the jurisdiction of the municipality connected to the water outflow end, and a customer's property to which the water outflow end of the water meter is connected It has a secondary water supply pipe. By providing the water supply pipe structure in this way, tap water from the main pipe can be supplied to consumers (see, for example, Patent Document 2).

JP 2001-32953 A JP 2008-248519 A

  Then, when an earthquake occurs, the main shutoff valve is closed, and water supply from the main to the customer stops and the water is shut off. And the local government staff will inspect for damage etc. with priority given to the main which the local government has jurisdiction in order to quickly recover from the water outage throughout the entire jurisdiction. Specifically, after the earthquake has subsided, the gate valve located downstream of the closed main shutoff valve is manually closed. Thereafter, water is inspected by passing water through the main pipe between the main shut-off valve and the gate valve. If the result of the water pressure test is acceptable, the gate valve and the gate valve located downstream of the gate valve are manually closed, and a water pressure test of the main pipe between the two gate valves is performed. Repeat this.

  However, in a water supply pipe branched from (connected to) the main valve between the main shutoff valve and the gate valve to be subjected to the closed water pressure inspection or between the gate valve and the gate valve, If the water supply pipe (secondary water supply pipe) is damaged, a good test result that passes the water pressure test cannot be obtained. Not only that, it is not possible to determine whether it is damaged in the main (community jurisdiction) or in the secondary water supply pipe (customer's property).

  Therefore, the water pressure test from the main pipe and the main pipe to the primary water supply pipe can be performed by manually rotating the rotary handle of the water cock in the box and closing the water cock. If the result of this water pressure test is acceptable, the secondary water supply pipe may be damaged. Moreover, when the water pressure test | inspection from the said main pipe to a primary side water supply pipe is unsuccessful, it can identify that there is a break in at least a main pipe, a primary side water supply pipe, or both of them. However, it is necessary to move to each customer's home where the stop cock is installed and close each stop cock one by one, and the closing work is a time-consuming and troublesome work, and the water shut-off time is prolonged. There was room for improvement.

  In view of the above-described situation, the present invention is to provide a water supply pipe structure capable of quickly eliminating a water cut by efficiently performing a main restoration operation.

In order to solve the above-described problems, the water supply pipe structure according to the present invention includes a primary side water supply pipe connected to the main pipe, and a water supply for a water meter connected to an outlet side end of tap water of the primary side water supply pipe. A secondary side water supply pipe connected to the water outflow side end, and arranged between the primary side water supply pipe and the water meter or between the water meter and the secondary side water pipe, A water supply pipe shut-off valve that houses a detector and operates when the seismic detector detects vibrations of a predetermined magnitude generated by an earthquake to shut off the flow of tap water, the water pipe shut-off valve, and the water tap A box that can accommodate a meter for use and is buried in the ground , wherein the shutoff valve for the water supply pipe is composed of a motorized valve, and the motorized valve includes a valve body that blocks the flow of tap water And opening and closing the valve body in the valve box part through a valve shaft connected to the valve body. And a drive mechanism portion including the earthquake detector, wherein the drive mechanism portion has a thickness direction dimension smaller than a left-right width direction dimension. The drive mechanism portion is arranged above the valve box portion so that the thickness direction is directed to the tap water flow direction and the lateral width direction is directed to a direction orthogonal to the tap water flow direction . .

According to the present invention, when a predetermined magnitude of vibration is generated by an earthquake, the water supply pipe shutoff valve shuts off the flow of tap water, and the supply of tap water to the secondary side water supply pipe is stopped.
In this state, water pressure can be inspected between the main pipe and the primary side water supply pipe by passing water from the main pipe to the primary side water supply pipe. If the result of the water pressure test is acceptable, it can be seen that the main pipe and the primary water supply pipe are good. Moreover, if a water pressure test result is unacceptable, it turns out that a main pipe or a primary side water supply pipe or both are defective (for example, are damaged). Moreover, the quality (for example, whether it is damaged) of a secondary side water supply pipe | tube is known by letting water flow to a secondary side water supply pipe | tube and performing a water pressure test | inspection.
Further, as described above, the drive mechanism portion is arranged above the valve box portion so that the thickness direction of the drive mechanism portion configured to be smaller than the left-right width direction is directed to the tap water flow direction. If this is done, the space of the drive mechanism in the direction of tap water flow can be kept small, and the water supply pipe shutoff valve can be easily accommodated in the box.

  In the water supply pipe structure of the present invention, the water supply pipe shutoff valve may be arranged such that the lower surface thereof is located above the lower surface of the water meter.

  As described above, if the water supply pipe shut-off valve is arranged so that its lower surface is located above the lower face of the water meter, when the water pipe shut-off valve is installed, the lower surface of the water pipe shut-off valve The mounting operation can be performed reliably and easily without contacting the upper surface of the bottom of the box.

  Moreover, the water supply pipe structure of this invention 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.

  As described above, if the primary side water supply pipe and the secondary side water supply pipe are arranged at the coaxial height position, the primary side water supply pipe and the secondary side water supply pipe are placed at different positions in the height direction. Compared to the arrangement, the accommodation space in the height direction in the box can be reduced, and the box in the height direction can be reduced in size.

  In the water supply pipe structure of the present invention, a stop cock 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 side water supply pipe are arranged. The water supply pipe shutoff valve may be disposed between the two.

  In the water supply pipe structure of the present invention, it is preferable that the dimension of the tap water flow direction in the water supply pipe shutoff valve is set within 200 mm.

  As described above, if the dimension of the tap water flow direction in the water supply pipe shutoff valve is set within 200 mm, both the water meter and the water pipe shutoff valve are accommodated in the box containing the existing water meter. It becomes possible to do.

  Moreover, the water supply pipe structure of this invention WHEREIN: The center position in the flow direction of the tap water of the said drive mechanism part may have shifted | deviated to the said water meter side with respect to the said valve box part.

  As described above, if the center position of the drive mechanism in the tap water flow direction is shifted toward the water meter with respect to the valve box, the primary water supply pipe or the secondary water supply located at the end of the box When connecting the water supply pipe shutoff valve 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.

  According to the present invention, when vibration of a predetermined magnitude occurs due to an earthquake, the shutoff valve for the water supply pipe provided in the box is closed, so that the defective part of the piping under the jurisdiction of the local government can be immediately grasped. It is possible to provide a water supply pipe structure that can efficiently eliminate the water break by efficiently performing the pipe restoration work. Also, by placing the water supply pipe shut-off valve in a box that can accommodate a water meter, there is an advantage that new excavation is unnecessary and the installation cost can be reduced. Furthermore, since the shutoff valve for the water supply pipe is in the immediate vicinity of the water meter, there is an advantage that the local government can easily perform maintenance and management, and the consumer can easily check the shutoff status.

It is a schematic plan view in which the water supply pipe structure of the present invention is connected to the main pipe. It is a top view of the same water supply pipe structure. It is a longitudinal cross-sectional view of the same water supply pipe structure. It is the side view which made a part of cut-off valve for water supply pipes into the section. It is the rear view which looked at the shutoff valve for water supply pipes from the downstream. It is the schematic front view which looked at the cutoff valve for water supply pipes of other embodiment from the upstream. It is the schematic front view which looked at the cutoff valve for water supply pipes of other embodiment from the upstream.

  In FIG. 1, the schematic plan view of the water supply equipment which has the water supply pipe structure of this invention is shown. The water supply system includes a main pipe 1 for flowing tap water from a distribution reservoir (not shown), a main shut-off valve 2 provided on the upstream side of the main pipe 1, and a main shut-off valve 2 downstream. A large number (four in FIG. 3) of water supply connected via a water faucet (not shown) between the manual gate valve 2A provided on the side and the main shutoff valve 2 and the gate valve 2A And a tube structure 3. The tap water supplied to the water supply pipe structure 3 can be used by a customer's house (such as a detached house or an apartment house) H. In FIG. 1, only one gate valve 2A is shown, but a gate valve may also be provided on the main pipe 1 downstream of the gate valve 2A shown in FIG.

  As shown in FIGS. 1 to 3, the water supply pipe structure 3 includes a primary side water supply pipe 4 connected to the main pipe 1 via a water faucet (not shown), a box 5 having an accommodation space, and a box 5 is provided with a stop cock 6, a water supply pipe shutoff valve 7, and a secondary water pipe 8 connected to the tap water outflow end of the water pipe shutoff valve 7. 2 shows a state in which the lid 9 of FIG. 3 is removed.

  Between the stop cock 6 and the cutoff valve 7 for water supply pipes, a water meter M located at the end of the jurisdiction of the local government is arranged. A stop cock 6 is arranged on the primary side which is the inflow side of the tap water with respect to the water meter M, and a shutoff valve 7 for the water supply pipe is arranged on the secondary side which is the outflow side of the tap water with respect to the water meter M. Has been. Therefore, in the longitudinal direction of the box 5, the water meter M can be disposed substantially in the center, and the lid 9 (described later) of the box 5 can be opened to facilitate meter reading and maintenance of the water meter M. . Further, since the height of the water stop cock 6 and the water supply shutoff valve 7 is 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 shutoff valve 7 are performed. There is an advantage that the operation handle 27 is easily operated. Further, a lid (cover) that can be opened and closed by a hinge is attached to the water meter M so as to cover the scale of the meter. Therefore, since a space when the lid (cover) is opened is necessary above the water meter M, it is preferable to set the height of the water meter M as low as possible in consideration of the space above the water meter M. . Furthermore, by setting the water supply pipe shut-off valve 7 so as to be slightly higher than the stop cock 6, not only the maintenance work of the power supply mechanism provided in the second case 26K described later can be easily performed but also buried in the ground. Even when water is accumulated in the box 5, it is easy to avoid the water from being immersed in the power supply mechanism at a high position.

  The box 5 has a bottom wall 10 that is open at the top and has a rectangular shape (rectangular in FIG. 1) in 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 of the tap water flow direction, and the rear wall 13 is located downstream of the tap water flow direction. 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-like vertical ribs 12A for wall reinforcement projecting toward 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 on the water meter M side of the vertical ribs 12A, 13A are configured to be inclined surfaces that are located on the water meter M side as they go upward.

  The bottom wall 10 has a first recessed portion 10A, a second recessed portion 10B, and a third recessed portion whose upper surfaces are lower than the other portions at three locations of an upstream end portion, a downstream end portion, and a substantially central portion in the flow direction of tap water. 10C. And the thickness of three recessed part 10A, 10B, 10C is comprised by the same magnitude | size, and between the 1st recessed part 10A and the 2nd recessed part 10B, the front side flat part 10D and the 2nd recessed part 10B and the 3rd recessed part 10C The thickness of the rear flat portion 10E is larger than the thickness of the three concave portions 10A, 10B, 10C (specifically, more than twice the thickness of the concave portions 10A, 10B, 10C). By comprising in this way, the intensity | strength increase of the part where intensity | strength is required can be aimed at, suppressing the weight increase of the box 5. FIG.

  A front through-hole 16 through which the primary water supply pipe 4 connected to the main pipe 1 can be inserted is formed at the center in the left-right direction at the lower end of the front wall 12. In addition, a rear side through-hole 17 through which the secondary side water supply pipe 8 to which the outflow side end of the water supply pipe shut-off valve 7 is connected is formed at the central portion in the left-right direction at the lower end portion of the rear wall 13.

  Moreover, the primary side water supply pipe | tube 4 and the secondary side water supply pipe | tube 8 are arrange | positioned so that it may become a coaxial height position. By arranging in this way, the storage space in the height direction in the box 5 is made smaller than in 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 box 5 can be downsized in the height direction. Further, in FIG. 3, the primary side water supply pipe 4, the water supply meter M and the secondary side water supply pipe 8 are arranged at the coaxial height position, and the water supply meter M is connected to the primary side water supply pipe 4. There is also an advantage that resistance to tap water flowing through to the secondary side water supply pipe 8 can be reduced as much as possible.

  The stop cock 6 includes a rotary handle 18 for manually opening and closing a valve (not shown) provided therein. By rotating the rotary handle 18 in one direction, the valve can be closed 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.

  A stop cock 6 disposed on the upstream side of the box 5 in the flow direction of tap water and the primary water supply pipe 4 are connected by a joint 19. Further, the stop cock 6 is placed and supported on the front flat portion 10D of the bottom wall 10 via a pedestal 20 provided at the lower part. As described above, the front flat portion 10D is thicker than the thickness of the three recesses 10A, 10B, and 10C. Therefore, the front flat portion 10D is not deformed by the weight of the stop cock 6, and the stop cock 6 is improved. 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 M can be favorably supported.

  The upstream end of the water meter M in the flow direction of the tap water is connected to an expansion joint 21 provided at the downstream end of the tap water flow direction of the tap water 6, and the downstream 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 in the tap water flow direction of the water supply pipe shutoff valve 7. More specifically, screw portions are formed on the outer surfaces of both ends of the tap water flow direction of the water meter M, and the expansion joint 21 is screwed into and connected to one of the upstream screw portions, and the other on the downstream side. The joint 22 is screwed into and connected to the screw portion.

  Further, the water supply pipe shutoff valve 7 and the secondary side water supply pipe 8 are connected via a joint 23 provided at the upstream end of the secondary side water supply pipe 8. More specifically, a screw portion is formed on the outer surface of the downstream end portion in the tap water flow direction of the valve box portion 24 of the water supply shutoff valve 7, and the joint 23 of the secondary side water supply pipe 8 is formed in this screw portion. Is screwed in and connected. Then, the screw portion on the downstream side in the tap water flow direction of the water meter M and the screw portion on the downstream side end portion in the tap water flow direction of the valve box portion 24 of the water supply pipe shutoff valve 7 are located inside the box 5. Therefore, after the joint 23 is screwed and connected to one screw part, the work of screwing and connecting the joint 22 to the other screw part is easy, and there is an advantage that the water supply pipe shutoff 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 floating state so as to be slightly movable in the vertical direction. After the joint 23 at the downstream end of the valve 7 is screwed into the secondary water supply pipe 8 and connected to the screw portion of the fixed water meter M, it can be screwed in and connected. The connection work of the shut-off valve 7 can be performed quickly.

  As shown in FIGS. 2 to 5, the water supply pipe shutoff valve 7 includes a valve body 28 that shuts off the flow of tap water, and a valve box portion 24 corresponding to a pipe that forms a flow path, and a valve body 28. A drive mechanism unit 30 that houses a drive mechanism 25 that operates the valve body 28 in the open position to the closed position via the connected valve shaft 29, and the valve body 28 that has been operated to the closed position are forced to the open position. A manual operation handle 27 for operation is provided.

  The drive mechanism 25 includes a power transmission mechanism (not shown) for operating 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 body 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 includes an earthquake detector (not shown) that detects a predetermined vibration generated by the earthquake, a power supply unit such as a battery that supplies electric power to the electric motor based on an output signal from the earthquake detector, And a control unit having a substrate on which electronic components for controlling driving of the electric motor are mounted.

  Most of the power transmission mechanism is housed in a first case 25K having a rectangular parallelepiped shape different from the valve box portion 24. A part of the power transmission mechanism (motor for transmitting power) and the power supply mechanism are the valve box portion 24 and the second case. It is housed in a rectangular parallelepiped second case 26K different from the one case 25K. The first case 25K and the second case 26K constitute the drive mechanism unit 30. Since the power supply mechanism has a large number of electronic components that are vulnerable to water, as shown in FIG. 5, a third case 31 is further provided inside the second case 26 </ b> K, and power is supplied into the third case 31. Contains the mechanism. Further, the second case 26K is provided with a screw rod (not shown) for screwing and fixing the second case 26K together with the third case 31 to the first case 25K. The upper end of the screw rod protrudes upward from the upper end of the second case 26K. And the cover wall 32 which covers the protrusion end of a screw rod is provided in the upper end of the 2nd case 26K. A removable cap 33 for closing the opening is fitted into the opening at the upper end of the cover wall 32.

  As shown in FIGS. 2, 4, and 5, the dimension D1 in the thickness direction of the drive mechanism 30 is configured to be smaller than the dimension S1 in the left-right width direction, and the thickness direction of the drive mechanism 30 is the flow of tap water. The drive mechanism portion 30 is disposed on the upper surface 24a of the valve box portion 24 so as to face the direction. Actually, the dimension D1 in the thickness direction of the drive mechanism unit 30 is set to be equal to or less than half of the dimension S1 in the left-right width direction. Further, the dimension S2 in the height direction (vertical direction) of the drive mechanism unit 30 is configured to be smaller than the dimension S1 in the horizontal width direction, and the dimension S2 in the height direction (vertical direction) of the drive mechanism unit 30. Also, the dimension D1 in the thickness direction is small.

  Actually, the dimension in the flow direction of tap water in the water supply pipe shutoff valve 7, that is, the dimension D1 in the thickness direction of the drive mechanism 30 is set within 200 mm. More specifically, the dimension L1 from the end face of the inlet of the valve box 24 to the end face of the outlet is set to 68.5 mm. Further, the first dimension D1 in the thickness direction of the drive mechanism section 30 disposed above the valve box section 24 (the flow direction of tap water in FIG. 3) is set to 67 mm, and the thickness direction secondary side of the drive mechanism section 30 is set. A 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 in which the dimension of the cutoff valve 7 for the water supply pipe in the tap water flow direction is the maximum, the first dimension D1 + the second dimension D2, is set to 80 mm, which is smaller than half of 200 mm. Further, the internal dimension L2 in the flow direction of tap water in the box 5 is 460 mm (when the diameter of the water meter M is 20 mm) with respect to the dimension of the shutoff valve 7 for the water supply pipe. The internal dimension L2 of the box 5 is changed according to the diameter of the water meter 8.

  For example, a box 5 having an internal dimension of 320 mm is used for a water meter M having a diameter of 13 mm (a dimension in the flowing direction of tap water is 100 mm). In addition, an internal dimension of 460 mm with respect to a water meter M having a diameter of 20 mm (a dimension in the flowing direction of tap water is 190 mm) and a water meter M having a diameter of 25 mm (a dimension in the flowing direction of tap water is 225 mm). Box 5 is used. Also, an internal dimension of 520 mm with respect to a water meter M having a diameter of 30 mm (a dimension in the flow direction of tap water is 230 mm) and a water meter M having a diameter of 40 mm (a dimension in the direction of flow of tap water is 245 mm). The box 5 having an internal dimension of 850 mm is used for a water meter M having a diameter of 50 mm (a dimension in the flow direction of tap water is 420 mm). Further, a box 5 having an internal dimension of 1100 mm is used for a water meter M having a diameter of 75 mm (a dimension in the flow direction of tap water is 630 mm). Therefore, even if the dimension of each water meter M is subtracted from the internal dimension of the box 5, the dimension exceeds 200 mm. Therefore, by setting the dimension of the water supply shutoff valve 7 within 200 mm, the above range becomes 320 mm to 1100 mm. If the box 5 has an internal dimension within the range, the water meter M and the water supply pipe shutoff valve 7 can be reliably accommodated in the box 5. In this way, by setting the dimension of the shutoff valve for the water supply pipe in the flow direction of tap water within 200 mm, the box that accommodates the existing water meter can be used, and the cost of material can be reduced compared to making a dedicated box There is. Incidentally, the box whose internal dimension is in the range of 320 mm to 1100 mm has the left-right width dimension in the range of 170 mm to 650 mm and the height dimension in the range of 180 mm to 650 mm.

  Further, as shown in FIG. 4, the center position C1 of the drive mechanism 30 in the direction of tap water flow is displaced toward the water meter M side with respect to the center position C2 of the valve box 24 in the direction of tap water flow. ing. The amount of deviation is actually set to 13 mm, but may be set to any value. In this way, when connecting the water supply pipe shutoff valve 7 to the secondary side water supply pipe 8 located at the end of the box 5, the drive mechanism 30 is moved away from the end of the box 5 on the secondary side water supply pipe 8 side as much as possible. Therefore, connection work can be performed easily. Moreover, as shown in FIG. 3, the end surface 26 </ b> T on the secondary side water supply pipe 8 side of the second case 26 </ b> K is configured as an inclined surface that is positioned on the water meter M side as it goes upward. Further away from the vertical rib 13A.

  Further, the water supply pipe shut-off valve 7 is disposed such that the lower surface thereof, specifically, the lower surface 24A of the valve box portion 24 is positioned above the lower surface MA of the water meter M. Therefore, when attaching the water supply pipe shutoff valve 7, the lower surface 24 </ b> A of the water supply pipe shutoff valve 7 does not come into contact with the upper surface of the bottom wall 10, which is the bottom of the box 5, and the attachment work can be performed reliably and easily. Can do. Specifically, as shown in FIG. 2, the upper surface 10U of the recess 10C of the bottom wall 10 of the box 5 is positioned below the rear flat portion 10E with which the lower surface MA of the water meter M is in contact. Therefore, the distance between the lower surface 24A of the valve box portion 24 and the upper surface 10U of the concave portion 10C of the box 5 can be secured large, and there is an advantage that the water pipe shutoff valve 7 can be attached more easily. .

  The water supply pipe shut-off valve 7 configured as described above will be described. When the earthquake detector detects a vibration having a predetermined magnitude due to an earthquake, the control unit outputs a drive signal to the drive mechanism 25. Then, the valve of the water supply pipe shutoff valve 7 is closed, so that the flow of tap water is shut off and the water is shut off. Local government officials conduct a water pressure inspection of the main 1 before shutting down the main 1 after shutting down. At this time, the 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 confirm whether the main pipe 1 or the primary side water supply pipe 4 or both are good (whether they are damaged). In the water pressure test, if a predetermined water pressure is applied and the pressure is lower than the predetermined pressure even after a lapse of a predetermined time, it is determined that the water pressure is lower than the predetermined pressure. If it is maintained, it is judged as passing. Alternatively, water may be passed from the upstream side to fill the pipe, and if the water flow does not stop, it may be determined to be unacceptable, and if it stops, it may be determined to be acceptable.

  That is, when the water pressure test result is acceptable, it can be confirmed that there is no damage to the pipe between the main pipe 1 and the primary side water supply pipe 4 (water meter M). Moreover, when the water pressure test result is unacceptable, it can be confirmed that the pipe is damaged between the main pipe 1 and the primary water supply pipe 4 and is defective. In addition, when the water pressure inspection result is acceptable, if you want to check the quality of the secondary side water supply pipe 8 (water supply pipe in the customer's home), add water pressure to the secondary side water supply pipe 8 and perform the water pressure inspection. Can be confirmed by doing.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, in the above-described embodiment, the water supply pipe shutoff valve 7 is provided between the water supply meter M and the secondary side water supply pipe 8, but the water supply pipe shutoff valve is provided between the primary side water supply pipe 4 and the water supply meter M. 7 may be provided.

  Moreover, in the said embodiment, although the water stop cock 6 was provided, you may abbreviate | omit. In this case, it is preferable that the water supply pipe shut-off valve 7 is configured to be operated from the open position to the closed position so that water can be stopped at any time other than during an earthquake. The operation from the open position to the closed position of the water supply pipe shutoff valve 7 uses an electric force or a manual operation force.

  In the above embodiment, the water supply shutoff valve 7 is configured to be electrically driven so that the drive mechanism 25 is driven using electric power such as a battery or a battery to switch from the open position to the closed position. You may comprise in a formula.

  In the above embodiment, the water supply pipe shutoff valve 7 is arranged so that its lower surface 24A is located above the lower face MA of the water meter M. However, the lower face 24A of the water supply pipe shutoff valve 7 The bottom surface of the bottom wall 10 corresponding to the bottom surface 24A of the water supply pipe shutoff valve 7 is positioned downward so that the bottom surface 10A of the water supply pipe does not hit the top surface of the bottom wall 10 of the water supply pipe. It can also arrange | position so that it may be located below the lower surface MA of the water meter M, or the lower surface MA of the water meter M.

  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. Also good.

  Moreover, in the said embodiment, although the rectangular box 5 was provided in planar view, the box 5 of what shapes, such as elliptical shape, oval shape, trapezoid shape, circular shape, polygonal shape, may be sufficient.

  In the above-described embodiment, the manual operation handle 27 for forcibly operating the valve body 28 to the open position is provided. However, an electric motor for operating the valve body 28 using power to the open position can be omitted. An actuator such as an electromagnetic solenoid is provided for implementation. Further, 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 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 shown, the size including the size of the manual operation handle 27 may be used. Thus, even when the dimension S1 in the left-right width direction including the dimension of the manual operation handle 27 and the dimension S2 in the height direction (vertical direction) are set, the water supply pipe shutoff valve 7 can be accommodated in the box.

  Moreover, in the said embodiment, although the water supply pipe cutoff valve 7 comprised the valve box part 24 and the drive mechanism part 30 from a different part, you may integrate and comprise from one part. Moreover, although the drive mechanism part 30 was comprised from two cases of the 1st case 25K arrange | positioned on the upper surface 24a of the valve box part 24, and the 2nd case 26K arrange | positioned on the upper surface of the 1st case 25K, it shows in FIG. Thus, it may be composed of one case 34 (in FIG. 6, it has a rectangular parallelepiped shape, 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 inflow port formed in the valve box 24. In FIG. 6, the drive mechanism 30 is disposed on the upper surface 24 a of the valve box 24, but as shown in FIG. 7, the drive mechanism is located on one side of the valve box 24 (left or right side in the left-right width direction). You may arrange | position the case 35 which accommodates the part 30 so that the thickness direction of the drive mechanism part 30 may face 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. Further, a first case configured to be substantially the same height as the valve box portion 24 on the lateral side (left or right side in the left-right width direction) of the valve box portion 24 and a second case straddling the first case and the valve box portion 24. The drive mechanism unit 30 may be configured from the above.

  Moreover, in the said embodiment, although the screw part was provided in the edge part of the shutoff valve 7 for water supply pipes, and it connected to the joint, it provided by connecting with a flange, or provided with the cylindrical part, it fitted, and a retaining ring or a clip-like component It may be connected with a screw or a screw.

  DESCRIPTION OF SYMBOLS 1 ... Main pipe, 2 ... Shut-off valve, 2A ... Manual type gate valve, 3 ... Water supply pipe structure, 4 ... Primary side water supply pipe, 5 ... Box, 6 ... Water stop cock, 7 ... Water supply pipe shut-off valve, 8 ... Secondary side water supply pipe, 9 ... lid, 10 ... bottom wall, 10A, 10B, 10C ... concave part, 10D ... front side flat part, 10E ... rear side flat part, 10U ... top face, 11 ... side wall, 11A ... upper opening, 12 ... front wall, 12A, 13A ... vertical rib, 12a, 13a ... end face, 13 ... rear wall, 14 ... left side wall, 15 ... right side wall, 16 ... front side through hole, 17 ... rear side through hole, 18 ... rotating handle, DESCRIPTION OF SYMBOLS 19 ... Joint, 20 ... Base, 21, 22, 23 ... Joint, 24 ... Valve box part, 24A ... Lower surface, 24A ... Lower surface, 25 ... Drive mechanism, 25K ... First case, 26K ... Second case, 26T ... End face 27 ... Manual operation handle, 28 ... Valve element, 29 ... Valve shaft, 30 ... Drive mechanism, 31 ... 3 cases, 32 ... covering wall, 33 ... cap, D1 ... dimension in the thickness direction, H ... customer's house, L1 ... dimension, M ... water meter, MA ... bottom surface, S1 ... horizontal width direction, S2 ... high Dimension in the vertical direction

Claims (6)

A primary water pipe connected to the main,
A secondary side water supply pipe connected to the tap water outflow side end of the water meter connected to the tap water outflow side end of the primary side water supply pipe;
It is arranged between the primary water supply pipe and the water meter or between the water meter and the secondary water supply pipe, houses an earthquake detector, and has a predetermined magnitude of vibration generated by an earthquake. A shutoff valve for a water supply pipe that operates by detecting the earthquake detector and shuts off the flow of tap water;
A box that can accommodate the shutoff valve for the water supply pipe and the water meter and is buried in the ground;
Provided ,
The water supply pipe shut-off valve comprises an electric valve,
The motor-operated valve houses a valve box portion having a valve body that blocks the flow of tap water, and a drive mechanism for opening and closing the valve body in the valve box portion via a valve shaft connected to the valve body. And a drive mechanism unit comprising the earthquake detector,
The dimension in the thickness direction of the drive mechanism is configured to be smaller than the dimension in the left-right width direction,
The drive mechanism portion is disposed above the valve box portion so that the thickness direction of the drive mechanism portion is directed to the tap water flow direction and the lateral width direction is directed to a direction orthogonal to the tap water flow direction. A water supply pipe structure characterized by that.   2. The water supply pipe structure according to claim 1, wherein the water supply pipe shut-off valve is disposed such that a lower surface thereof is located above a lower surface of the water meter.   The water supply pipe structure according to claim 1 or 2, wherein the primary side water supply pipe and the secondary side water supply pipe are arranged so as to have a coaxial height position.   A stop cock for stopping the flow of tap water is disposed between the primary side water supply pipe and the water meter, and the water pipe shutoff valve is provided between the water meter and the secondary side water pipe. It is arrange | positioned, The water supply pipe structure of any one of Claims 1-3 characterized by the above-mentioned.   The water supply pipe structure according to any one of claims 1 to 4, wherein a dimension of the tap water flow direction in the water supply pipe shutoff valve is set within 200 mm. The center position in the flow direction of the tap water of the drive mechanism section is shifted to the water meter side with respect to the valve box section, according to any one of claims 1 to 5. Water supply pipe structure.

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