JP6574605B2 - Shut-off valve - Google Patents

Description

  The present invention relates to a shut-off valve that can shut off the flow of tap water by switching a valve body from an open position to a closed position in an emergency when an earthquake occurs, for example.

  Such a shut-off valve includes a valve body that is attached to a rotatable valve shaft and can be switched between an open position and a closed position by rotation around the valve shaft, a gear portion that is linked to the valve shaft, and a valve body that is in an open position. In order to switch the valve shaft to the closed position in an emergency, a cable for rotating the valve shaft through the gear part, a cable for connecting the motor and the power source, and when the power from the power source is cut off due to an earthquake A storage battery as a backup power source for supplying power, a manual opening / closing knob for rotating the valve shaft via the gear portion to manually switch between the closed position and the open position of the valve body, the gear portion and the motor And a casing for housing the storage battery. And the said opening-and-closing knob is provided in the state which penetrated the bottom wall of the casing and protruded below (for example, refer patent document 1).

Japanese Patent No. 4878962

  In the shut-off valve of the above-mentioned patent document 1, when an earthquake occurs and the power from the power source is interrupted, the valve body can be rotated by the power from the storage battery to switch the valve body to the closed position. And if an earthquake calms down, the valve body of a blockade position must be switched to an open position, and water supply must be restored. When the power from the power source is interrupted at the time of recovery and the remaining power of the storage battery is low, the motor cannot be driven to switch the valve body at the closed position to the open position. Therefore, by rotating the open / close knob, the valve body in the closed position is switched to the open position by an artificial operation force. However, the open / close knob protrudes downward through the bottom wall of the casing. The casing is in the way, making it difficult to reach the open / close knob. In particular, if the shut-off valve is buried deep in the soil, it is difficult to reach the open / close knob, and it is very difficult to rotate the open / close knob. For this reason, the recovery work has been troublesome and troublesome.

  In view of the above-described situation, the present invention is to provide a shut-off valve that can quickly switch the valve body at the closed position to the open position with an artificial operating force at the time of recovery.

In order to solve the above-described problems, the shut-off valve of the present invention includes a rotatable valve shaft, a valve body attached to the valve shaft and switchable between an open position and a closed position, and a valve body for rotating the valve shaft. A driving mechanism; an electronic component group including a battery and a motor for driving the driving mechanism; and a casing that houses the driving mechanism and the electronic component group, and the driving mechanism is rotatable in the casing. An operation shaft extending upward and configured to be connected to one axial end portion of the rotation shaft to operate the rotation shaft, and an upper end portion of the operation shaft. And an operating part having a rotating part for rotating the operating shaft, wherein the operating part is positioned at substantially the same height as the upper end of the casing or above the upper end of the casing. Configured to be located in , The valve shaft consists of vertical axis, the gear is provided at an upper end of the valve shaft, the driving mechanism, operatively connected with said with said rotary shaft provided on the other axial end portion motor of the rotary shaft And a worm gear that is attached to an intermediate portion in the axial direction of the rotary shaft so as to rotate integrally with the rotary shaft, and meshes with the gear, and one end portion of the rotary shaft and a lower end portion of the operation shaft, Are interlocked and connected by a power transmission conversion mechanism .

According to the present invention, for example, when the valve body is switched to the closed position in an emergency when an earthquake occurs, the valve body is moved from the open position by electrically operating the drive mechanism by the motor to rotate the valve shaft. Switch to the closed position. Then, when the seismic calms down and the valve body at the closed position is positioned at the open position, the rotating part positioned at substantially the same height as the upper end of the casing or above the upper end of the casing is moved to the casing. You can grab immediately without being disturbed. Then, by rotating the rotating unit, the rotational force of the operating shaft of the operating unit is reliably transmitted to the rotating shaft via the power transmission conversion mechanism, and the valve shaft rotates, so that the valve body at the closed position is removed. It can be switched to the open position.
In addition, since the worm gear meshes with the gear that rotates integrally with the valve shaft, it is possible not only to prevent the valve body in the closed position from rotating unexpectedly to the open position side, but also the valve body switched to the open position Unexpected rotation to the closed position due to water pressure can also be suppressed. Further, the rotation speed can be increased or decreased when the rotation from the operation shaft is transmitted to the rotation shaft only by changing the gear ratio of the power transmission conversion mechanism.

  In the shutoff valve of the present invention, the operation shaft may be configured to be detachable from the power transmission conversion mechanism.

  As described above, the operation shaft is configured to be detachable from the power transmission conversion mechanism so that the operation shaft is attached to the power transmission conversion mechanism only when the valve body at the closed position is positioned at the open position. It can be removed so as not to get in the way.

  According to the present invention, when the seismic calms down and the valve body at the closed position is positioned at the open position, the rotation is located at the same height as the upper end of the casing or at a position higher than the upper end of the casing. Provides a shut-off valve that can quickly switch the valve body in the closed position to the open position with an artificial operating force at the time of recovery because the part can be immediately gripped and rotated without being obstructed by the casing. can do.

1 is an overall view of a water distribution facility in which a shutoff valve of the present invention is arranged. It is a longitudinal cross-sectional view which shows a part of embedding state of the same shut-off valve. It is a principal part detail drawing of the shut-off valve installed near the water faucet. It is the side view which made the valve body the partial cross section of the cutoff valve of an open position. It is the side view which made the valve body the partial cross section of the cutoff valve of the obstruction | occlusion position. It is a longitudinal cross-sectional view of the drive mechanism with which the cutoff valve is provided when the downstream side is viewed from the upstream side. It is a cross-sectional plan view of the same drive mechanism. It is a longitudinal cross-sectional view of the drive mechanism. It is the longitudinal cross-sectional view which mounted | wore with the 1st case provided with the drive mechanism in the valve box, and mounted | worn the 2nd case on the 1st case. It is a general view of the shut-off valve when the downstream side is viewed from the upstream side. It is a longitudinal cross-sectional view of the 2nd case which accommodated the electronic component group. It is a general view of the cutoff valve which shows the state to which the operating shaft was attached. It is a general view of the cutoff valve which shows the state to which the operating shaft was attached. It is a whole view of the shut-off valve which shows the state just before attaching an operation axis. (A) The perspective view of the tool for removing a cap, (b) It is the figure which made the partial cross section which shows the state just before removing a cap with the tool of Fig.8 (a). It is a general view of the water distribution facility which shows 2nd Embodiment which changed arrangement | positioning of the cutoff valve of this invention. It is a longitudinal cross-sectional view which shows a part of embedding state of the same shut-off valve. It is a longitudinal cross-sectional view which shows a part of embedding state of the water distribution facility which shows 3rd Embodiment which changed arrangement | positioning of the cutoff valve of this invention.

  The shutoff valve according to the present embodiment is an emergency shutoff valve (hereinafter simply referred to as a shutoff valve) that shuts off water supply (an example of fluid) to each door when an earthquake exceeding a predetermined seismic intensity occurs. For example, the shut-off valve is disposed in a meter box in which a water meter is accommodated, and is also provided for a water supply pipe (water supply pipe 8 to be described later) from the water main to the faucet of each door (building 9 to be described later). Installed at an appropriate place. Hereinafter, an embodiment of a shutoff valve of the present invention will be described with reference to the drawings.

  First, the water distribution facility where the shutoff valve 1 is arranged will be described. As shown in FIG. 1, the water distribution facility K2 is connected to the water reservoir W and a water main H (a plurality of water mains H1 connected to the water reservoir W to supply water from the water reservoir W to a predetermined location). , H2...) And a gate valve B in the middle of the water main H. The gate valve B includes a plurality of gate valves B1 and B2 and is connected to a plurality of appropriate locations on the water main H.

  A water supply structure K1 for supplying water to the faucet side of each door (building 9 to be described later) is connected to the secondary side of the water main H constituting the water supply facility. This water supply structure K1 is connected to the water main H through a water faucet D (for example, a water faucet with a saddle). Specifically, the shutoff valve 1 connected to the water faucet D, the water supply pipe 8 is connected from the shutoff valve 1, and the upstream first stop cock 5 </ b> A connected in the middle of the water supply pipe 8 (FIG. 1). In FIG. 2, the second stop cock 5B (provided in the meter box 3) on the downstream side is provided.

  As shown in FIGS. 2 and 3, the water faucet D is connected to the upper part of the water main pipe H, and the shutoff valve 1 is connected in the vicinity of the water faucet D. Further, the first stop cock 5A is embedded in the vicinity of the boundary Z between the public road R1 and the residential land R2, and in particular, is branched from the main water supply pipe 8 to a plurality of sub water supply pipes 8A and connected to the plurality of buildings 9. Generally, it is used when the distance from the boundary Z to the meter box 3 is long (in FIG. 1, it is branched into four water supply pipes 8A). The first stop cock 5A is closed when the water supply pipe 8 of the water supply structure K1 is inspected and maintained. The first stop cock 5A is in a state of being housed in a tubular (cylindrical or polygonal tubular) housing 2. The opening formed at the upper end of the storage unit 2 is closed by a detachable lid 2A.

  The shutoff valve 1 is embedded on the public road R1 side, and its primary side end is connected to the threaded portion 4 of the water faucet D via a cap nut-like joint 6 as shown in FIG. The other secondary side end is connected to the water supply pipe 8 via a cap nut-like joint 7. In addition, as shown in FIG. 2, the shut-off valve 1 is in a state of being housed in a tubular (cylindrical or polygonal tubular) housing 10. The opening formed at the upper end of the storage unit 10 is closed by a detachable lid 10A.

  Next, a specific configuration of the shutoff valve 1 will be described. As shown in FIGS. 4 to 7 and 9, the shut-off valve 1 is attached to a rotatable valve shaft 19 and can be switched between an open position (see FIG. 4) and a closed position (see FIG. 5). 13 and a drive mechanism 21 having a laterally rotating shaft 37 that is linked to the valve shaft 19 to rotate the valve shaft 19, and a drive mechanism 21 to operate the valve body 13 in the open position to the closed position in an emergency. A motor M as an actuator for driving the motor, a plurality of batteries 12 and 12 for supplying electric power to the motor M (two but here may be one or three or more), and the electric power of the motor M An operating portion 24 for manually operating the rotary shaft 37 of the drive mechanism 21 to switch the valve body 13 operated to the closed position to the open position, and a casing C that houses the drive mechanism 21, the motor M, and the batteries 12, 12. And.

  As shown in FIGS. 9 to 11, the casing C includes a first case 22 that houses the drive mechanism 21 and a second case 23 that houses the motor M and the batteries 12 and 12. Further, a watertight cover 25 is further provided for covering the second case 23 from above to increase the sealing degree.

  Returning to FIGS. 4 and 5, the valve element 13 is accommodated in the valve box 11. In the valve box 11, a primary side opening 26 is formed at a primary side end on the water main (water supply) H side, and a secondary side opening 27 is formed at a secondary side end on the building side. In the valve box 11, a valve body accommodating portion 28 that is expanded in diameter with respect to the primary side portion and the secondary side portion is formed between the primary side end and the secondary side end. The valve body 13 is accommodated in the valve body accommodating portion 28.

  An annular valve seat 29 is fitted to the inner peripheral surface of the secondary side opening 27 near the valve body accommodating portion 28 via a seal member m9. A communication opening 30 is formed at the center of the valve base 29.

  The valve shaft 19 is a vertical shaft along the vertical direction, and is spaced apart in the vertical direction so that the valve shaft 19 is fitted and supported on the upper and lower sides of the valve body housing portion 28 near the secondary side. A pair of cylindrical bulges 31 and 32 are formed. The valve shaft 19 is inserted through the upper bulging portion 31 via a seal member m10. A helical gear 39 (see FIG. 7), which will be described later, is attached to the upper end of the valve shaft 19 so as to rotate integrally.

  And the valve body 13 can be switched to the open position of FIG. 4 because the valve shaft 19 rotates to one side around the vertical axis. At this time, the presser member 44 of the drive mechanism 21 is in a position indicated by a solid line in FIG. Further, the valve shaft 19 rotates around the vertical axis to the other side, and the valve body 13 can be switched to the closed position of FIG. At this time, the pressing member 44 of the driving mechanism 21 is in a position indicated by a two-dot chain line in FIG.

  As shown in FIG. 9, the drive mechanism 21 is housed and assembled (assembled) inside the first case 22 and unitized. An electronic component group 33 for controlling the driving of the drive mechanism 21 is provided, and the electronic component group 33 is stored (assembled) in a second case 23 that is separate from the first case 22. ), Unitized. The first case 22 is disposed on the valve box 11, and the second case 23 is detachably mounted on the first case 22. That is, the valve box 11, the first case 22, and the second case 23 are stacked in this order from the bottom.

  As shown in FIGS. 6 to 8, the first case 22 includes a bottom wall 22A that is rectangular in plan view and a side wall 22B that is erected from four sides of the bottom wall 22A, and the upper portion is an open portion 22C. It is formed in a rectangular parallelepiped shape. The rectangular parallelepiped first case 22 is arranged so that the long side direction is along the lateral width direction of the meter box 3. The opening 22C is covered with a plate-like lid 34. The first case 22 and the lid body 34 are assembled via a seal member m1. The bottom wall 22A is placed on the upper surface 11a of the valve box 11, and the first case 22 is detachably attached to the upper surface 11a by a bolt V inserted from the inside of the first case 22 into the bottom wall 22A and the upper surface 11a of the valve box 11. Installed on. The bottom wall 22A and the upper surface 11a are attached via a seal member m2. An insertion hole 22a through which the valve shaft 19 is inserted is formed in the bottom wall 22A shown in FIG. Further, the valve shaft 19 is assembled to the insertion hole 22a via a seal member m5.

  As shown in FIGS. 8 to 10, the lid body 34 is formed in a rectangular shape, and includes a rectangular receiving plate 34 </ b> A and a support frame 34 </ b> B erected from four sides. The receiving plate 34A is formed with a fitted portion 34a (see FIG. 9) into which a fitting portion 23B (see FIG. 11) of the second case 23 described later is fitted. The to-be-fitted part 34a is arrange | positioned in the one side side of the cover body 34 (near right end in FIG. 9). The fitted portion 34 a is formed in a cylindrical shape, and is formed so as to protrude downward and upward with respect to the plate surface of the lid body 34. A driven bevel gear 35 (see FIG. 7), which will be described later, is disposed immediately below the fitted portion 34a. A seal member m3 (see FIG. 8) is fitted to the outer peripheral surface portion of the support frame 34B.

  The configuration of the drive mechanism 21 will be described with reference to FIGS. The drive mechanism 21 includes a gear mechanism 36 having a driven bevel gear 35, a lateral rotation shaft 37 that is linked to the gear mechanism 36 and rotatably supported by the first case 22, and is externally fixed to the rotation shaft 37. A worm gear 38 and a helical gear 39 that meshes with the worm gear 38 and transmits power to the valve shaft 19 are provided. A one-way clutch 40 is disposed between the rotary shaft 37 and a second rotary shaft 14 described later. Further, the worm gear 38 and the helical gear 39 constitute a speed reduction mechanism so as to obtain torque for reliably rotating the valve shaft 19 to place the valve body 13 in the closed position. Since the valve shaft 19 is attached to the helical gear 39 with which the worm gear 38 meshes as described above, the valve body 13 positioned at the closed position due to water pressure is prevented from moving to the open position side, and the valve body 13 is prevented. Can be switched from the closed position to the open position, the valve body 13 can be switched to the open position by the one-way clutch 40 with certainty.

  The gear mechanism 36 includes a driven bevel gear 35 and a plurality (two in FIG. 6) of spur gears 41 for changing the gear ratio of the driven bevel gear 35. The driven bevel gear 35 rotates around the central axis in the direction along the short direction S, which is a direction orthogonal to the water supply direction, and one spur gear 41 is configured to mesh with the shaft portion 35A. The worm gear 38 is externally fitted and fixed so as to rotate integrally with a rotary shaft 37 whose longitudinal direction is the short direction S. The worm gear 38 is disposed at an intermediate portion in the axial direction of the rotating shaft 37.

  As shown in FIG. 6, a plurality of support columns 42 are erected from the upper surface of the bottom wall 22 </ b> A of the first case 22, and the bottom wall 43 </ b> A of the bracket 43 having a U-shaped cross section with the upper side open is supported by the support column 42. ing. Both end sides in the axial direction of the rotating shaft 37 are rotatably supported by the vertical wall 43B of the bracket 43. As shown in FIG. 7, the helical gear 39 that meshes with the worm gear 38 is attached to the upper end of the valve shaft 19 so as to be integrally rotatable, and is formed in a fan shape in plan view.

  The one-way clutch 40 is provided between the rotating shaft 37 and the lateral second rotating shaft 14 disposed on one end side in the axial direction of the rotating shaft 37, and rotates the rotating unit 16 described later in one direction. Thus, the rotational force of the second rotary shaft 14 is transmitted to the rotary shaft 37. Thereby, the valve shaft 19 is rotated, and the valve body 13 in the closed position can be switched to the open position with a manual operation force.

  As shown in FIG. 13, the operating portion 24 is configured to be connectable to one end of the second rotating shaft 14 on the side away from the second case 22 so as to operate the rotating shaft 37 (see FIG. 9) and extends upward. An operation shaft 15 and a rotating unit 16 provided at the upper end of the operation shaft 15 for rotating the operation shaft 15 are provided. One end of the second rotating shaft 14 and the lower end of the operation shaft 15 are interlocked and connected by a power transmission conversion mechanism 17.

  The operation shaft 15 is composed of a vertically long rod-like member that is long in the vertical direction. The rotating part 16 is fitted to the upper end part of the operation shaft 15 and is fixed by screws b.

  The power transmission conversion mechanism 17 includes a first bevel gear 17A attached to one end of the second rotating shaft 14 so as to rotate integrally therewith, and a second bevel for meshing with the first bevel gear 17A to transmit rotational force. And a vertical axis 18 that is rotatable about a vertical axis including a gear 18A. A concave portion 15 </ b> A formed at the lower end of the operation shaft 15 is fitted to the upper end portion of the vertical axis 18 so that the rotational force of the operation shaft 15 can be transmitted to the vertical axis 18. The power transmission conversion mechanism 17 is housed in an L-shaped cylindrical body 20 that extends laterally outward from the first case 22. In addition, a large diameter portion 18D having a diameter larger than that of the upper and lower ends is provided at the vertical center portion of the vertical axis 18, and a sealing member 18M for sealing the cylindrical body 20 is provided at the large diameter portion 18D. ing. The operation shaft 15 is merely fitted to the upper end portion of the vertical axis 18, and the operation shaft 15 is configured to be detachable from the vertical axis 18. Therefore, as shown in FIG. 13, the operating shaft 15 can be removed from the vertical axis 18 and moved to a place where it does not get in the way. After the operation shaft 15 is removed from the vertical axis 18, a cap 55 for closing the opening is attached to the opening at the upper end of the cylindrical body 20 (see FIG. 14).

  A tool 56 for removing the cap 55 is shown in FIG. The tool 56 includes a handle 56B at the upper end of the vertically long plate member 56A, and an engaging portion 56C that engages with the flange portion 55A of the cap 55 at the lower end of the plate member 56A. The engaging portion 56C includes a pair of upper and lower arc-shaped plate portions 56d and 56d and a connecting plate portion 56e that connects the outer peripheral edges of the pair of upper and lower plate portions 56d and 56d in the vertical direction. Accordingly, as shown in FIG. 15B, the engaging portion 56 </ b> C is engaged with the flange portion 55 </ b> A of the cap 55 while operating the tool 56. Once engaged, the cap 55 can be removed by lifting the tool 56 upward in the direction of the arrow. In addition, when the cap 55 is attached, the cap 55 is fitted into the opening at the upper end of the cylindrical body 20 with the hook portion 55A of the cap 55 engaged with the engaging portion 56C.

  When the valve body 13 in the closed position is switched to the open position, the second rotating shaft 14 is connected via the power transmission conversion mechanism 17 by rotating the rotating portion 16 counterclockwise in a state viewed from above in FIG. Rotate counterclockwise. The rotational force transmitted to the second rotating shaft 14 is transmitted to the rotating shaft 37 via the one-way clutch 40, and the helical gear 39 is rotated, whereby the valve shaft 19 rotates and the valve body 13 in the closed position opens. Switch to position.

  As shown in FIG. 8, the upper part of the valve shaft 19 is inserted into the insertion hole 22a, and a seal member m5 is externally fitted to an intermediate portion in the axial direction of the valve shaft 19 that is inserted into the insertion hole 22a. In the valve shaft 19, the portion inserted through the insertion hole 22 a and inserted into the first case 22 is formed such that the upper portion has a smaller diameter than the lower portion via the stepped surface 19 a.

  The central portion of the helical gear 39 is inserted up to the stepped surface 19a, and the helical gear 39 is secured from the valve shaft 19 by retaining means. The retaining means includes an arm-like pressing member 44 extending over the upper surface of the valve shaft 19 and the upper surface of the helical gear 39, and a mounting bolt 45 for fixing the pressing member 44 to the upper end surface of the valve shaft 19. A mounting bolt 45 is inserted through the presser member 44 and screwed into the upper end surface of the valve shaft 19.

  As shown in FIGS. 7 and 8, the pressing member 44 is formed in a hook shape extending in a horizontal plane (above the rotating shaft 37) without contacting the rotating shaft 37 and the worm gear 38. The pressing member 44 is configured to be rotatable together with the helical gear 39 around the center of the helical gear 39 (which is also the center of the valve shaft 19) within a range where the tooth portion 39A is formed. More specifically, as will be described later, it is configured to be rotatable within a range in which the tooth portion 39A is formed within the time for driving the motor M. A permanent magnet E is mounted on the upper surface of the tip end portion of the pressing member 44.

  As shown in FIGS. 9-11, the 2nd case 23 is formed in the rectangular parallelepiped shape. The second case 23 is detachably attached to the lid 34 of the first case 22. The second case 23 includes a bottom wall 23A that is rectangular in plan view and a covering 46 that covers the bottom wall 23A from above. The bottom wall 23A and the cover 46 are assembled via a seal member m6. On one end side in the short direction of the bottom wall 23A, the fitting portion 23B that fits in the fitted portion 34a is formed. The fitting portion 23B is formed in a cylindrical shape and protrudes downward with respect to the wall surface of the bottom wall 23A. A seal member m7 is fitted on the outer peripheral surface of the fitting portion 23B. At the center of the bottom wall 23A surrounded by the fitting portion 23B, an insertion hole 49 through which a drive shaft 48 of a drive bevel gear 47, which is a drive transmission portion described later, is inserted is formed. The drive shaft 48 is an axis along the vertical direction.

  The electronic component group 33 is housed in the second case 23, and includes, as electronic components, a motor (DC motor) M and two batteries (storage batteries that do not receive power supply from the outside) 12 for supplying electric power to the motor M. , 12, a seismic detector 50 that detects an earthquake with a seismic intensity equal to or greater than a predetermined seismic intensity, and a set having a function of controlling power supply from the batteries 12, 12 to the motor M by inputting seismic intensity signals from the seismic detector 50 Control board (not shown). Although not shown, the control board is disposed between the batteries 12 and 12 and the back side wall of the second case 23 so as to stand upright along the batteries 12 and 12.

  The drive transmission unit includes a drive bevel gear 47 and a motor M. Further, the second case 23 includes a magnetic sensor that reacts with the magnetic force of the permanent magnet E and an LED. This magnetic sensor detects that the presser member 44 has rotated when it corresponds to the permanent magnet E in the vertical direction. In order to notify the open / close state of the valve body 13 by this detection, a lighting or blinking signal is output to the LED via the control circuit of the control board.

  As shown in FIG. 12, the second case 23 is covered with a watertight cover 25 from above in order to ensure watertightness for the electronic component group 33 (see FIG. 11). That is, the water-tightness with respect to the electronic component group 33 is ensured by the double sealing between the second case 23 and the water-tight cover 25. The watertight cover 25 is formed in a box shape with the lower side opened. Four side walls 25B of the watertight cover 25 (only three directions are shown in FIG. 12) are configured to be fitted from the outside to the seal member m3 fitted to the support frame 34B of the lid 34.

  The watertight cover 25 includes a top wall 25A. In addition, the watertight cover 25 is configured such that the back surface of the top wall 25 </ b> A contacts the upper surface of the second case 23 in a state where the watertight cover 25 is fitted to the support frame 34 </ b> B of the lid 34. Furthermore, the watertight cover 25 is provided with an attachment rod 51 for fixing it so that it does not easily come off the support frame 34B. The mounting rod 51 passes through the outside of the second case 23 inside the watertight cover 25 and is screwed into a screw hole of the first case 22 (for example, the receiving plate 34A in FIG. 9).

  Thus, the second case 23 is mounted so as to be pressed against the first case 22 by the watertight cover 25. The head of the attachment rod 51 is configured as a rotation operated portion 52. The operating shaft 15 provided with the rotating portion 16 is removed from the vertical axis 18, and the concave portion 15 </ b> A of the operating shaft 15 is externally fitted to the rotated operated portion 52 as indicated by an imaginary line in FIG. 12. By rotating the rotating portion 16 in this state, the rotation operated portion 52 can be rotated to screw the attachment rod 51 or release the screw. A seal member m8 is externally fitted to a portion of the rotary operated portion 52 that is inserted through the top wall 25A.

  On the top wall 25A of the watertight cover 25, a cover wall 53 is formed so as to protrude upward. Normally, the cover 54 is covered with a lid 54 to conceal the rotationally operated portion 52. As described above, when removing or attaching the attachment rod 51, the lid 54 is removed, and after the work is completed, the lid 54 is attached again. The lid 54 can be removed and attached using the tool 56 described above.

  The operation of the shutoff valve 1 in the meter box 3 configured as described above will be described. At a normal time before an earthquake occurs, the valve body 13 is open to open the communication opening 30 of the valve base 29 as shown in FIG. Water supply to each door (building) is possible at this open position. The pressing member 44 of the drive mechanism 21 in the open position of the valve body 13 is in a state indicated by a solid line in FIG.

  When an earthquake greater than a predetermined seismic intensity occurs, the seismic detector 50 detects this and when the seismic intensity signal is output to the control circuit of the control board, the control circuit inputs the seismic intensity signal from the seismic detector 50. Thus, control is performed so that power is supplied from the batteries 12 and 12 to the motor M. Then, the motor M is driven, the drive bevel gear 47 rotates around its axis, and the driven bevel gear 35 meshed with the drive bevel gear 47 rotates around the shaft portion 35A and meshes with the shaft portion 35A. The spur gear 41 rotates around its axis, and the rotating shaft 37 connected to the spur gear 41 and the worm gear 38 fitted around the rotating shaft 37 rotate around the axis.

  Then, the helical gear 39 meshed with the worm gear 38 rotates, the valve shaft 19 connected to the helical gear 39 rotates about its axis, and the valve body 13 in the open position comes into contact with the valve base 29. Thus, the closed position (see FIG. 5) is obtained where the communication opening 30 is closed.

  In the closed position, water supply in the valve box 11 is shut off. That is, the water supply to each door (building) is interrupted. The driving of the motor M is controlled by a timer, for example, and is set so that the valve body 13 is in the closed position when the driving is continued for a predetermined time.

  When the valve shaft 19 rotates, the presser member 44 fixed to the valve shaft 19 rotates counterclockwise around the axis of the valve shaft 19, so that the presser member 44 is positioned at a position indicated by an imaginary line in FIG. 7. become. When this position is reached, the LED is turned on or blinked to notify the third party of the state in which the water supply is shut off. In this case, the notification of the LED is performed based on the detection signal of the magnetic sensor.

  When the earthquake subsides, a restoration work is performed to restore the shutoff valve 1 at the shutoff position to the open position. First, as shown in FIG. 2, after removing the lid 10 </ b> A of the storage unit 10, the lower end of the operation shaft 15 having the rotating unit 16 is fitted to the upper end of the vertical axis 18 (see FIG. 13) in the cylindrical body 20. Combine. In this state, by rotating the rotating portion 16 counterclockwise, the rotational force is transmitted to the second rotating shaft 14 via the power transmission conversion mechanism 17. The rotational force transmitted to the second rotating shaft 14 is transmitted to the rotating shaft 37 via the one-way clutch 40, and the valve shaft 19 rotates clockwise to place the valve body 13 in the open position. Therefore, as shown in FIG. 2, even when the shutoff valve 1 is buried deep in the soil, by removing the lid 10A of the storage unit 10 and attaching the operation shaft 15 to the vertical axis 18, The rotating part 16 can be positioned above the upper end of the casing C. Accordingly, the valve body 13 in the shut-off state can be quickly switched to the open position by immediately grasping the rotating portion 16 and performing a rotation operation.

  The shut-off valve of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention. In the above embodiment, the casing C is composed of the three cases 22, 23, 25. However, the casing C may be composed of one case, two cases, or four or more cases.

  In the above embodiment, the speed reduction mechanism is configured by the worm gear 38 and the helical gear 39 meshed with the worm gear 38. However, the speed reduction mechanism may be configured by the worm gear and the worm wheel meshed with the worm gear. In addition, the speed reduction mechanism may be configured from the worm gear and the spur gear meshed with the worm gear, and the specific configuration can be freely changed.

  In the above embodiment, the valve body 13 is rotated around the valve shaft 19 along the vertical direction (vertical direction). However, the valve shaft is disposed along the horizontal direction and the valve shaft along the horizontal direction. The structure which rotates around may be sufficient.

  In the said embodiment, although the storage battery which is a rechargeable battery was used as a battery which supplies electric power to the motor M, you may use the primary battery which cannot be charged.

  Moreover, in the said embodiment, although the motor M was used as an actuator which drives the drive mechanism 21, a fluid pressure cylinder, an electromagnetic actuator, etc. can be used.

  In the above embodiment, the operation shaft 15 is configured to be detachable from the power transmission conversion mechanism 17. However, the operation shaft 15 may be fixed to the power transmission conversion mechanism 17 so as not to be detachable.

  Moreover, in the said embodiment, although the case where the cutoff valve 1 was arrange | positioned in the vicinity of the water tap D was shown, as shown in FIG. 16, you may arrange | position in the vicinity of the meter box 3 and the upstream of a water supply direction. . In this case, as shown in FIG. 17, the shutoff valve 1 is housed in the housing portion 57, and the opening at the upper end of the housing portion 57 is closed by a lid body 57A that can be freely opened and closed. 2, when the rotary unit 16 is rotated to operate the shut-off valve 1 in the closed position to the open position, the rotary unit 16 is positioned above the upper end of the casing C of the shut-off valve 1. Since it is located in the vicinity of the ground surface, it can be easily and quickly rotated by grasping the rotating portion 16. In short, it is only necessary that the rotating unit 16 is in a position where the hand can be reached with the lid 57A opened. Moreover, in FIG. 18, the case where it arrange | positions between 5 A of 1st stop cocks and the faucet D is shown. In this case, the shutoff valve 1 is stored in the storage portion 58, and the opening at the upper end of the storage portion 58 is closed by a lid 58A that can be freely opened and closed. As in FIG. 2, when the rotary unit 16 is rotated to operate the shutoff valve 1 in the closed position to the open position, the rotary unit 16 is positioned above the upper end of the casing C of the shutoff valve 1. Since it is located in the vicinity of the ground surface, the rotating unit 16 can be easily and quickly rotated. 59 shown in the figure is a joint. The configurations not described in FIGS. 16 to 18 are the same as those in FIGS. 1 and 2 and are denoted by the same reference numerals.

  In the above embodiment, the seismic detector 50 that detects an earthquake with a predetermined seismic intensity or higher is used to detect the earthquake so that the valve body 13 is changed from the open position to the shut-off position. As 50, the valve element 13 may be switched from the open position to the shut-off position by detecting a predetermined seismic intensity and acceleration using a seismic device, an acceleration sensor, or the like.

  Moreover, in the said embodiment, the tap water was mentioned as an example of the fluid, and the cutoff valve 1 which performed the water supply cutoff of the tap water was mentioned as an example. However, the present invention is not limited to the shutoff valve 1 that shuts off the tap water supply, and can also be applied as a shutoff valve that shuts off other fluids. Examples of the liquid that is another fluid include industrial water, fuel oil, soft drinks, and liquid medicine.

  Moreover, in the said embodiment, when rotating the valve body 13, when rotating the valve body 13, although it was located in the upper position rather than the upper end of the casing C, it is the structure located in the substantially same height position as the upper end of the casing C. There may be.

  Moreover, in the said embodiment, although the valve shaft 19 and the valve body 13 were comprised separately and connected so that they might rotate integrally, both may be formed integrally and it may be set as the valve body 13. FIG.

  In the above embodiment, the one-way clutch 40 is provided, but the one-way clutch 40 may be omitted. In this case, by configuring the rotary shaft 37 to be long in the axial direction, the second rotary shaft 14 can be omitted to form a single rotary shaft 37.

  Moreover, in the said embodiment, although the power transmission conversion mechanism 17 was comprised from a pair of bevel gear wheel 17A, 18A, you may comprise from a worm gear and the worm wheel meshing | engaged with a worm gear.

  DESCRIPTION OF SYMBOLS 1 ... Shut-off valve, 2 ... Storage part, 3 ... Meter box, 4 ... Screw part, 5A ... 1st stop cock, 6, 7 ... Joint, 8, 8A ... Water supply pipe, 9 ... Building, 10 ... Storage part, DESCRIPTION OF SYMBOLS 10A ... Cover body, 11 ... Valve box, 11a ... Upper surface, 12 ... Battery, 13 ... Valve body, 14 ... 2nd rotating shaft, 15 ... Operation shaft, 15A ... Recessed part, 16 ... Rotating part (rotating handle), 17 ... Power transmission conversion mechanism, 17A ... first bevel gear, 18 ... vertical axis, 18A ... second bevel gear, 18D ... large diameter portion, 18M ... seal member, 19 ... valve shaft, 19a ... stepped surface, 20 ... cylindrical shape Body, 21 ... Drive mechanism, 22 ... First case, 22A ... Bottom wall, 22B ... Side wall, 22C ... Opening part, 22a ... Insertion hole, 23 ... Second case, 23A ... Bottom wall, 23B ... Fitting part, 23B ... fitting part, 24 ... operation part, 25 ... watertight cover, 25A ... top wall, 25B ... side wall, 26 ... primary side opening, 2 ... secondary side opening, 28 ... valve body housing part, 29 ... valve base, 30 ... communication opening part, 31 and 32 ... bulging part, 33 ... electronic component group, 34 ... lid body, 34A ... base plate, 34B DESCRIPTION OF SYMBOLS ... Support frame, 34a ... Mated part, 35 ... Driven bevel gear, 35A ... Shaft part, 36 ... Gear mechanism, 37 ... Rotating shaft, 38 ... Worm gear, 39 ... Helical gear, 39A ... Tooth part, 40 ... One-way clutch, DESCRIPTION OF SYMBOLS 41 ... Spur gear, 42 ... Support pillar, 43 ... Bracket, 43A ... Bottom wall, 43B ... Vertical wall, 44 ... Holding member, 45 ... Fixing bolt, 46 ... Covering body, 47 ... Drive bevel gear, 48 ... Drive shaft, 49 ... Insertion hole, 50 ... Earthquake detector, 51 ... Mounting rod, 52 ... Rotated operation part, 53 ... Cover wall, 54 ... Lid, 55 ... Cap, 56 ... Tool, 56A ... Plate member, 56B ... Handle, 56C Connecting plate portion, 56d ... plate portion, 56e ... connecting plate portion, 57, 58 Storage part, 57A, 58A ... Lid, 59 ... Joint, B1, B2, B ... Gate valve, C casing, D ... Water faucet, E ... Permanent magnet, H, H1, H2 ... Water main, K1 ... Water supply Structure, K2 ... Water distribution facility, L ... Longitudinal direction, M ... Motor, m1-m3, m5-m10 ... Seal member, R1 ... Public road, R2 ... Residential land, S ... Short direction, V ... Bolt, W ... Distribution reservoir, Z ... Boundary

Claims (2)

A rotatable valve shaft, a valve body attached to the valve shaft and switchable between an open position and a closed position, a drive mechanism for rotating the valve shaft, a battery and a motor for driving the drive mechanism Including an electronic component group, and a casing that houses the drive mechanism and the electronic component group,
The drive mechanism includes a lateral rotation shaft that is rotatably supported in the casing and rotates the valve shaft;
An operation shaft that is configured to be connectable to one axial end portion of the rotation shaft so as to operate the rotation shaft and extends upward, and a rotation portion that is provided at the upper end portion of the operation shaft and rotates the operation shaft. It has an operation part,
The operation unit is configured such that the rotating unit is positioned at substantially the same height as the upper end of the casing or an upper position than the upper end of the casing .
The valve shaft is a vertically oriented shaft, a gear is provided at the upper end of the valve shaft, and the drive mechanism is provided at the other axial end of the rotary shaft and interlocks the rotary shaft and the motor. And a worm gear that is attached to an axially intermediate portion of the rotating shaft so as to rotate integrally with the rotating shaft and meshes with the gear, and one end of the rotating shaft and a lower end of the operating shaft are A shut-off valve characterized by being interlocked and connected by a power transmission conversion mechanism . The shut-off valve according to claim 1 , wherein the operation shaft is configured to be detachable from the power transmission conversion mechanism.

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