JP2016070461A - Cutoff valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutoff valve capable of switching a valve body in a closed position with small electric power.SOLUTION: A cutoff valve includes: a drive mechanism 21 interlocked and connected to an openable/closable valve body; an actuator for driving the drive mechanism 21 so as to operate the valve body in an opening position to a closed position in emergency; a rotation operation part 24 for operating the drive mechanism 21 so as to switch the valve body operated to the closed position to the opening position; and a casing for storing the drive mechanism 21 and the actuator. The rotation operation part 24 is configured by: a rotary shaft 24A supported in the casing rotatably; and a protrusion part for protruding to the outside of the casing from the rotary shaft 24A. Between a drive rotary shaft 37 and the rotary shaft 24A, a one-way clutch 40 is provided which transmits a manual rotation force of the rotary shaft 24A to the drive rotary shaft 37 only when the valve body in the closed position is switched to the opening position.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a shutoff valve for shutting off the flow of tap water when an earthquake occurs, for example.

  Such a shut-off valve 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 linked to the valve shaft, and a valve in the open position In the event of an emergency, a motor for rotating the valve shaft via the gear unit to switch the body to the closed position in an emergency, a power supply for supplying power to the motor, a cable for connecting the power supply to the motor, and an earthquake A storage battery as a backup power source that supplies power when the power from the power supply is interrupted, and a manual type for rotating the valve shaft via a gear unit to manually switch between the closed position and open position of the valve body The opening / closing knob includes a casing that houses the gear portion, the motor, and the storage battery, and the opening / closing knob includes a rotating shaft that is rotatably supported by the casing, and an extending portion that protrudes out of the casing from the rotating shaft. Are (for example, see Patent Document 1).

Japanese Patent No. 4878962

In this shut-off valve, when an earthquake occurs and power from the power source is interrupted, the valve shaft is rotated by the power from the storage battery to switch the valve body to the closed position.
However, at the time of such rotation, since the open / close knob is interlocked and connected to the gear portion, the open / close knob must be rotated together with the valve shaft, and accordingly, an extra rotational force is required. In particular, when the shut-off valve is embedded in the soil, the open / close knob is rotatably supported via a seal member so that water does not enter from the gap between the casing and the open / close knob. There are many. In this configuration, the frictional resistance with the seal member is large, and a large rotational force is required. Therefore, a large-capacity storage battery that can supply a large amount of electric power must be used, and there is a disadvantage that the shut-off valve becomes large.

  In view of the above-mentioned situation, the present invention provides a shut-off valve that can switch the valve body to the closed position with a small electric power.

  In order to solve the above-described problem, the shut-off valve of the present invention includes a valve body that can be switched between an open position and a closed position by rotating, a drive mechanism that is interlocked with the valve body, and a valve in the open position. An actuator for driving the drive mechanism to switch the body to the closed position in an emergency, a battery for supplying electric power to the actuator, and a rotation operation unit for rotating the valve body to switch the valve body at the closed position to the open position A rotating shaft that is rotatably supported in the casing, and a protruding portion that protrudes from the rotating shaft to the outside of the casing. The rotational force of the rotary shaft is applied to the valve body only when the valve body at the closed position is switched to the open position between the valve body and the rotary shaft of the rotation operation unit. It is characterized in that a one-way clutch to reach.

  According to the present invention, power is supplied from the battery to the actuator, for example, in an emergency when an earthquake occurs. The drive mechanism is driven by the actuator to rotate the valve body, and the valve body in the open position is switched to the closed position. When the valve body in the open position is switched to the closed position, the driving force from the drive rotating shaft is not transmitted to the rotating shaft by the one-way clutch. Accordingly, since the rotation shaft is not rotated by the rotation of the drive rotation shaft, it is only necessary to supply the actuator with power sufficient to rotate the drive rotation shaft.

  The shut-off valve according to the present invention further comprises a forcible disconnecting means for forcibly disengaging the one-way clutch so that the rotational force of the rotating shaft is not transmitted to the valve body when the valve body is located in the open position. It is preferable.

  As described above, when the valve body is located at the open position, the forcible disconnection means forcibly disengages the one-way clutch, so that the forgetting to disengage the one-way clutch is never lost.

  In the shut-off valve of the present invention, the valve body is attached to a rotatable valve shaft, and the drive mechanism includes a drive rotation shaft on which a worm is fitted and a helical gear with which the worm meshes, and the helical gear It is preferable that the valve shaft is attached to the rotary shaft, and the drive rotary shaft and the rotary shaft are connected via the one-way clutch.

  As described above, since the valve shaft is attached to the helical gear that meshes with the worm, the valve body located at the closed position due to water pressure is prevented from moving to the open position side, and the valve body is moved from the closed position. If it is desired to switch to the open position, the one-way clutch can be engaged to switch to the open position reliably.

  The shut-off valve of the present invention is configured such that one end of the drive rotation shaft and one end of the rotation shaft are abutted so that the rotation shaft can be moved away from the drive rotation shaft, and the drive rotation shaft is driven. A contact member that moves in the axial direction with rotation is provided on the drive rotation shaft, and the contact member contacts the rotation shaft and separates the rotation shaft when the valve body at the closed position is switched to the open position. The forcible disconnecting means for forcibly disengaging the one-way clutch by operating to the side to perform.

  As described above, when the valve body in the closed position is switched to the open position, the one-way clutch can be forcibly disengaged by operating the abutting member to a side away from the rotating shaft. In the case of an emergency, when switching the valve body in the open position to the closed position, it is possible to reliably avoid that the locking portions of the one-way clutch abruptly contact each other and a rotational load is applied to the drive rotation shaft, Accordingly, the valve body can be switched to the closed position with small electric power.

  In the shutoff valve of the present invention, the rotating shaft may be rotatably supported by the casing via a sealing material.

  As described above, when the rotating shaft is rotatably supported by the casing via the sealing material, a large rotational force for rotating the rotating shaft is required, and therefore the configuration of the present invention is particularly advantageous. Become.

  According to the present invention, when the valve body in the open position is switched to the closed position, the driving force from the drive rotating shaft is not transmitted to the rotating shaft by the one-way clutch, so that the driving rotating shaft is small enough to be driven. A shut-off valve that can switch the valve body to the closed position with electric power can be provided. Therefore, the shut-off valve can be reduced in size.

It is a schematic plan view of the water supply pipe structure provided with the cutoff valve of this invention. It is a vertical side view of the same water supply pipe structure. It is a vertical side view of the cutoff valve in which a valve body exists in an open position. It is a vertical side view of the cutoff valve in which a valve body exists in a blockade position. It is a longitudinal cross-sectional view of the drive mechanism of the cutoff valve in which a valve body exists in the obstruction | occlusion position. It is a top view of the drive mechanism of the cutoff valve in which a valve body exists in a blockade position. (A) is a longitudinal cross-sectional view of the drive mechanism of the shut-off valve in which a valve body is just before an open position, (b) is a longitudinal cross-sectional view of the principal part of the drive mechanism of the shut-off valve in which a valve body is in an open position. It is a top view of the drive mechanism of the cutoff valve which has a valve body in an open position. FIG. 6 is a longitudinal sectional view showing a drive mechanism in a direction orthogonal to FIG. 5. It is a longitudinal cross-sectional view of a state in which the electronic component group is mounted on the drive mechanism. It is a rear view of the shut-off valve equipped with a watertight cover. It is the rear view which carried out the partial fracture | rupture of the shut-off valve equipped with the watertight cover. It is a longitudinal cross-sectional view which shows the internal structure of the 2nd case which comprises a cutoff valve.

  Hereinafter, an embodiment of a shutoff valve of the present invention will be described with reference to the drawings. 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. First, with reference to FIGS. 1-4, the schematic structure of the water supply piping structure 2 provided with the cutoff valve 1 is demonstrated.

  The water supply piping structure 2 includes a meter box 3, a stop cock portion 5 disposed in the meter box 3, and a shutoff valve 1. At the center 4 of the tap water in the meter box 3 in the direction of the virtual flow path (horizontal straight line shown by the one-dot chain line in FIGS. 1 to 4), the stop cock 5 is disposed closer to the primary side (upstream side) and shut off. The valve 1 is disposed closer to the secondary side (downstream side). Further, a water meter 6 is disposed between the stop cock 5 and the shutoff valve 1.

  The meter box 3 includes a rectangular bottom wall 3A in a plan view and side walls 3B erected upward from four sides of the outer peripheral edge of the bottom wall 3A. The bottom wall 3A and the side wall 3B are integrally formed. . The upper part of the meter box 3 is opened, and the short direction of the meter box 3 which is the horizontal direction perpendicular to the longitudinal direction L of the meter box 3 and the virtual flow path direction center 4 in FIG. In both directions of S, it is expanded toward the bottom.

  An upstream opening 8 through which the inflow pipe 7 is inserted is formed in the upstream side wall 3 </ b> B of the meter box 3. A downstream opening 10 through which the outflow pipe 9 is inserted is formed in the side wall 3B on the downstream side of the meter box 3. The upstream opening 8 has a larger diameter than the inflow pipe 7 in order to connect a primary pipe (not shown). The downstream opening 10 is formed with a larger diameter than the outflow pipe 9 in order to connect the secondary pipe.

  The inflow pipe 7, the outflow pipe 9, the stop cock 5, the water meter 6, and the shutoff valve 1 are arranged at the center in the short direction S of the meter box 3. Further, the inflow pipe 7, the stop cock 5, the water meter 6, and the virtual flow path direction center 4 of the valve box 11 are set to be substantially horizontal. The stop cock 5 is supported on the bottom wall 3A via a base 12, and the water meter 6 is placed directly on the bottom wall 3A or slightly floated from the bottom wall 3A. Inside the meter box 3, an inflow pipe 7, a stop cock 5, a water meter 6, a shut-off valve 1 and an outflow pipe 9 are connected to form a fluid supply path (hereinafter referred to as “water supply path”) 14. Is formed.

  The inflow pipe 7 and the stop cock 5 are connected via a joint 15, the stop cock 5 and the water meter 6 are connected via a joint 16, and the water meter 6 and the shut-off valve 1 are joints The shut-off valve 1 and the outflow pipe 9 are connected via a joint 18.

  Next, the configuration of the shutoff valve 1 will be described. As shown in FIGS. 3 to 6 and 10, the shutoff valve 1 is attached to a rotatable valve shaft 19 and can be switched between an open position (see FIG. 3) and a closed position (see FIG. 4). 13 and a drive mechanism 21 having a drive rotary shaft 37 linked to the valve shaft 19, and a motor M as an actuator for driving the drive mechanism 21 to operate the valve body 13 in the open position to the closed position in an emergency. And a plurality of (two, but one or three) batteries D, D for supplying electric power to the motor M, and the valve element 13 operated to the closed position by the electric force of the motor M. A rotation operation unit 24 for operating the drive mechanism 21 to switch to the open position, and a casing K that houses the drive mechanism 21, the motor M, and the batteries D and D are provided.

  The casing K is provided with the 1st case 22 which accommodates the drive mechanism 21, and the 2nd case 23 which accommodates the motor M and the batteries D and D, as shown in FIGS. In addition, a watertight cover 25 is further provided for covering the second case 23 from above to increase the sealing degree.

  Returning to FIGS. 3 and 4, the valve body 13 is accommodated in the valve box 11. In the valve box 11, a primary side opening 26 is formed at the primary side end of the water supply passage 14, and a secondary side opening 27 is formed at the secondary side end. The water supply path 14 is set on the virtual flow path direction center 4. In the valve box 11, a valve body accommodating portion 28 having a diameter enlarged with respect to the primary side portion and the secondary side portion is formed between the primary side end and the secondary side end which are intermediate portions of the water supply channel 14. Yes. 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 located on the water supply channel 14 is formed at the center of the valve base 29. The communication opening 30 is disposed inside the valve box 11 so as to pass through the virtual flow path direction center 4. Specifically, the center of the communication opening 30 coincides with the virtual flow path direction center 4 in the side view, and the center of the communication opening 30 is displaced with respect to the virtual flow path direction center 4 in the plan view. Has been.

  The valve shaft 19 is an axis extending in the vertical direction, and a pair of the valve shafts 19 spaced apart in the vertical direction is provided near the secondary side in the valve body housing portion 28 so as to fit and support the valve shaft 19 at the upper and lower portions thereof. Cylindrical bulging portions 31 and 32 are formed. The valve shaft 19 is inserted through the upper bulging portion 31 via a seal member m10.

  And the valve body 13 can be switched to the open position of FIG. 3 because the valve shaft 19 rotates to one side around the vertical axis. The drive mechanism 21 at this time is in the state shown in FIGS. 7B and 8. 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. The drive mechanism 21 at this time is in the state shown in FIGS.

  As shown in FIG. 10, 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 collected and housed in a second case 23 separate from the first case 22 (set). Attached) and 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 integrated in this order from the bottom.

  As shown in FIGS. 5 to 9, the first case 22 includes a bottom wall 22 </ b> A having a rectangular shape in a plan view, and a side wall 22 </ b> B erected from four sides of the bottom wall 22 </ b> A, and an upper portion with an open portion 22 </ b> C. It is formed in a rectangular parallelepiped shape. This 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 placed on the upper surface 11a by a bolt B1 inserted from the inside of the first case 22 into the bottom wall 22A and the upper surface 11a of the valve box 11. It is detachably attached. 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. 7A and 9 to 12, 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 that is erected from four sides. The receiving plate 34A is formed with a fitted portion 34a into which a fitting portion 23B (see FIG. 13) of a second case 23 described later is fitted. The fitted portion 34a is disposed near one side of the lid body 34 (closer to the right end in FIG. 7A). 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, which will be described later, is disposed immediately below the fitted portion 34a. A seal member m3 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 meshes with the worm 38, a gear mechanism 36 having a driven bevel gear 35, a drive rotary shaft 37 linked to the gear mechanism 36, a worm 38 fitted and fixed to the drive rotary shaft 37, and the worm 38. And a helical gear 39 that transmits power to the valve shaft 19. A one-way clutch 40 is disposed between the drive rotation shaft 37 and a rotation shaft 24A of the rotation operation unit 24 described later. Further, the worm 38 and the helical gear 39 constitute a speed reduction mechanism so that torque for reliably rotating the valve shaft 19 to bring the valve body 13 into the closed position can be obtained. Since the valve shaft 19 is attached to the helical gear 39 with which the worm 38 meshes as described above, the valve body 13 located 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 with the one-way clutch 40 engaged.

  The gear mechanism 36 includes a driven bevel gear 35 and a plurality of (two in FIG. 5) 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 virtual flow path direction center 4, and is configured such that one spur gear 41 meshes with the shaft portion 35A. Has been. The worm 38 is externally fitted and fixed so as to rotate integrally with a drive rotation shaft 37 whose longitudinal direction is the short direction S. The worm 38 is disposed in the middle of the drive rotating shaft 37 in the axial direction.

  As shown in FIGS. 5 and 7A, 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 a bracket 43 having a U-shaped cross section is opened on the support column 42. The bottom wall 43A is supported. Both end sides in the axial direction of the drive rotating shaft 37 are rotatably supported by the vertical wall 43 </ b> B of the bracket 43. Further, as shown in FIGS. 6 and 8, the helical gear 39 that meshes with the worm 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 so as not to transmit the rotational force of the rotating shaft 24 </ b> A of the rotation operation unit 24 to the valve shaft 19. As shown in FIGS. 5 to 8, the one-way clutch 40 is provided between the butted ends where the one end of the drive rotating shaft 37 and the rotating shaft 24 </ b> A of the rotating operation unit 24 are butted. Specifically, it is integrally formed on the outer periphery of the rotating body 40A attached to the front end side (the end side opposite to the gear mechanism 36, the left end side in FIG. 5) of the drive rotary shaft 37 so as to be integrally rotatable. A plurality of locking claws 40a (two in the figure) as locking portions and an end portion of the rotation operating portion 24 on the drive rotating shaft 37 side of the rotating shaft 24A are attached so as to be integrally rotatable, and the rotating body 40A. And a plurality of locking portions 40c (only two are shown in FIG. 6) integrally formed with an end surface 40b of the disk-like member 40B having a larger diameter at a circumferential interval. Therefore, when the drive rotary shaft 37 is rotated clockwise in the state viewed from the left end side in FIGS. 5 and 6, the locking claw 40a is locked only by getting over the locking portion 40c. It is not locked to the portion 40c. Thereby, the rotational force of the drive rotary shaft 37 is not transmitted to the rotary shaft 24A of the rotary operation unit 24. On the other hand, in FIG. 7A and FIG. 8, when the rotation shaft 24A of the rotation operation unit 24 is rotated counterclockwise using the manual operation handle 45 when viewed from the left end side, The portion 40c is locked to the locking claw 40a and rotates the drive rotating shaft 37 integrally. Thereby, the valve body 13 in the closed position can be switched to the open position by a manual operation force.

  As shown in FIGS. 7A and 11, the rotation operation unit 24 is rotatable integrally with the rotation shaft 24A and the rotation shaft 24A for transmitting a manual rotation force to the drive rotation shaft 37 via the one-way clutch 40. And a manual operation handle 45 (see FIG. 11) that constitutes a protruding portion that protrudes out of the side wall 22B. The manual operation handle 45 includes a shaft portion 45A that is detachably fitted to the rotary shaft 24A. The rotating shaft 24 </ b> A is fitted in the side wall 22 </ b> B of the first case 22 in a cylindrical portion 44 formed so as to protrude in the short direction S without a gap. Further, a waterproof seal member m4 serving as a rotational resistance with the case 22 is externally fitted to the middle portion of the rotation shaft 24A in the axial direction, and rotates to the cylindrical portion 44 of the first case 22 via the seal member m4. It is supported freely. Therefore, by rotating the manual operation handle 45 counterclockwise as viewed from the left end of FIGS. 7A and 11, the locking portion 40c constituting the one-way clutch 40 is engaged with the locking claw 40a as described above. The rotary shaft 24A is stopped and the drive rotary shaft 37 is rotated integrally. Thereby, the valve body 13 in the closed position can be forcibly switched to the open position. The rotary shaft 24A is configured to be movable away from the drive rotary shaft 37, that is, outside the case 22, and is operated to the side away from the drive rotary shaft 37 by a contact member 49 described later. The one-way clutch 40 is forcibly turned off.

  As described above, the forcible disconnecting means for forcibly disengaging the one-way clutch 40 is provided. This forcible cutting means is a means for preventing the rotational force of the rotary shaft 24A from being transmitted to the valve shaft 19 when the valve body 13 is located at the open position. Specifically, the forcible cutting means is screwed into a screw 37N formed on the outer surface of the end of the drive rotating shaft 37 on the rotating shaft 24A side, as shown in FIGS. And a conversion mechanism for converting the rotational force of the drive rotary shaft 37 into a moving force of the contact member 49 in the axial direction. The contact member 49 includes a small-diameter cylindrical portion 49A having a screw portion that is screwed into the screw 37N on the inner surface, a large-diameter cylindrical portion 49B that is larger in diameter than the small-diameter cylindrical portion 49A, a small-diameter cylindrical portion 49A, and a large-diameter cylindrical portion. 49C and a connecting portion 49C for connecting 49B in the radial direction. The conversion mechanism includes a pair of vertical walls 50, 50 provided on the bottom wall 22 </ b> A of the first case 22 so as to extend in the short direction S of the meter box 3, and the vertical walls 50, 50 when the contact member 49 rotates. It is comprised from a pair of contact part 49D, 49D with which the contact member 49 was equipped so that it may contact | abut. One abutting portion 49D includes a vertical wall portion 49d that extends to the bottom wall 22A of the first case 22 at the lower portion on one side in the width direction of the large-diameter cylindrical portion 49B. The other abutting portion 49D extends in the horizontal direction from the lower end of the large-diameter cylindrical portion 49B on the other side in the width direction from the vertical wall portion 49d extending to the bottom wall 22A of the first case 22 and the lower end of the vertical wall portion 49d. It is comprised from the plate-shaped horizontal part 49e. Therefore, when the drive rotation shaft 37 is rotated in one direction, the corresponding contact portion 49D hits the one vertical wall 50 and the rotation of the contact member 49 is prevented. As a result, the rotational force that rotates the contact member 49 is converted into a movement force in the axial direction of the contact member 49, and the contact member 49 is moved to one side in the axial direction. In other words, the contact member 49 is automatically moved by the conversion mechanism to one side in the axial direction (right side in FIG. 5) when the valve body 13 is switched from the open position to the closed position by driving the electric motor M. To do. On the other hand, when the drive rotation shaft 37 is rotated to the other side, the contact portion 49D corresponding to the other vertical wall 50 hits the rotation of the contact member 49. As a result, the rotational force that rotates the contact member 49 is converted into a moving force in the axial direction of the contact member 49, and the contact member 49 is moved to the other side in the axial direction. In other words, the contact member 49 is rotated counterclockwise when the manual operation handle 45 is viewed from the left end side in FIG. 7A to switch the valve body 13 from the closed position to the open position. Then, it automatically moves to the other side in the axial direction (left side in FIG. 7) by the conversion mechanism.

  Specifically, in order to switch the valve body 13 in the closed position to the open position, the manual operation handle 45 fitted on the rotation shaft 24A of the rotation operation unit 24 in FIG. By rotating clockwise, the locking part 40c is locked to the locking claw 40a and rotates the drive rotary shaft 37 integrally. As a result, not only can the valve body 13 in the closed position be forcibly switched to the open position, but also the contact member 49 moves to the left side as shown in FIGS. It contacts 40B. When the contact member 49 further moves to the left from this contact state and pushes the disk-shaped member 40B, the rotary shaft 24A can be separated from the rotary body 40A as shown in FIG. In FIG. 7B, the manual operation handle 45 is omitted). In this manner, the one-way clutch 40 is forcibly brought into the disengaged state by operating the abutting member 49 to the disc-shaped member 40B and operating the rotary shaft 24A to the side away from the disc-shaped member 40B. In this way, when the valve body 13 in the open position is switched to the closed position in an emergency, the locking portions 40a and 40c of the one-way clutch 40 come into contact unexpectedly, and a rotational load is applied to the drive rotary shaft 37. Such a situation can be reliably avoided, and the valve body 13 can be switched to the closed position with a small amount of electric power. Further, when the abutting member 49 abuts on the disc-like member 40B and is operated to the side separating the rotary shaft 24A, the locking between the locking portion 40c and the locking claw 40a is released. Thus, when the valve body 13 is located at the open position, the forcible disconnecting means forcibly turns off the one-way clutch 40, so that the forgetting to put the one-way clutch 40 in a disengaged state will not occur. Further, since the locking is released as described above, even if the manual operation handle 45 is rotated, the drive rotary shaft 37 is not rotated. Therefore, the manual operation handle 45 is driven by excessive rotation. It is possible to provide a highly reliable shut-off valve without causing damage to the mechanism 21. Further, even if the manual operation handle 45 is rotated, the drive rotary shaft 37 is not rotated, so that it is possible to prevent the valve body 13 from being opened and closed arbitrarily by a third party. It is also effective in prevention. When the valve body 13 in the closed position is switched to the open position, since the locking between the locking portion 40c and the locking claw 40a is released as described above, the locking portion 40c and the locking claw The manual operation handle 45 is pushed slightly toward the drive rotary shaft 37 so that the manual operation handle 45 can be locked, and then the manual operation handle 45 is rotated. 6 shows a state in which the locking portion 40c is locked to the locking claw 40a. In FIG. 7B, the locking portion 40c (see FIG. 6) is not locked to the locking claw 40a. Thus, both are in a separated state.

  The cylindrical portion 44 is formed so as to protrude from the side wall 22B of the first case 22, the rotation shaft 24A is disposed at a deep position in the cylindrical portion 44, and the shaft portion 45A of the manual operation handle 45 is It is inserted into the cylindrical portion 44 and connected to the rotating shaft 24A. With this configuration, the connecting portion between the shaft portion 45A of the manual operation handle 45 and the rotary shaft 24A can be protected from gravel and mud, and the handle of the manual operation handle 45 is inserted into the cylindrical portion 44. The manual operation handle 45 can be smoothly rotated by using the cylindrical portion 44 as a guide.

  As shown in FIG. 9, the upper part of the valve shaft 19 is inserted into the insertion hole 22a, and a seal member m5 is externally fitted to the middle portion in the axial direction of the valve shaft 19 that is inserted into the insertion hole 22a. A portion of the valve shaft 19 that is inserted into the first case 22 through the insertion hole 22a is formed such that the upper portion has a smaller diameter than the lower portion via the stepped surface 19a.

  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 47 extending over the upper surface of the valve shaft 19 and the upper surface of the helical gear 39, and a mounting bolt 48 for fixing the pressing member 47 to the upper end surface of the valve shaft 19. A mounting bolt 48 is inserted through the presser member 47 and screwed into the upper end surface of the valve shaft 19.

  As shown in FIGS. 8 and 9, the presser member 47 is formed in a hook shape extending in a horizontal plane (above the drive rotation shaft 37) without contacting the drive rotation shaft 37 and the worm 38. The pressing member 47 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 H is mounted on the top surface of the tip of the presser member 47.

  As shown in FIGS. 10 to 13, the second case 23 is formed in a 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 rectangular bottom wall 23A in plan view and a covering 51 that covers the bottom wall 23A from above. The bottom wall 23A and the covering body 51 are assembled through 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 54 through which the drive shaft 52A of a drive bevel gear 52, which is a drive transmission portion described later, is inserted is formed. The drive shaft 52A is an axis along the vertical direction.

  The electronic component group 33 is housed in the second case 23, and as the electronic component, a motor (DC motor) M and two batteries for supplying electric power to the motor M (storage battery that does not receive power supply from the outside). D, D, and an earthquake detector 53 that detects an earthquake with a predetermined seismic intensity or higher, and a function of controlling power supply from the batteries D, D to the motor M by inputting seismic intensity signals from the seismic detector 53. And a set of control boards (not shown). The control board is not shown, but is disposed between the batteries D and D and the back side wall of the second case 23 so as to stand upright along the batteries D and D, for example.

  The drive transmission unit includes a drive bevel gear 52 and a motor M. Further, the second case 23 includes a magnetic sensor that reacts with the magnetic force of the permanent magnet H and an LED. When this magnetic sensor corresponds to the permanent magnet H in the vertical direction, it detects that the presser member 47 has rotated. 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. 13). 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. Further, 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 a mounting rod 57 for fixing it so that it does not easily come off the support frame 34B. The mounting rod 57 passes through the outside of the second case 23 inside the watertight cover 25 and is screwed into the first case 22 (for example, the receiving plate 34A in FIG. 10).

  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 57 is configured as a rotation operated portion 57A. The manual operation handle 45 is removed from the rotating shaft 24A, and the manual operation handle 45 is externally fitted to the rotation operated portion 57A as indicated by the phantom line in FIG. By rotating the manual operation handle 45 in this state, the rotation operated portion 57A can be rotated and the attachment rod 57 can be screwed or unscrewed. A seal member m8 is externally fitted to a portion of the rotation operated portion 57A that is inserted through the top wall 25A.

  On the top wall 25A of the watertight cover 25, a cover wall 56 is formed so as to protrude upward. Normally, the cover 55 is covered with a cap 55 to conceal the rotationally operated portion 57A. As described above, when removing or attaching the attachment rod 57, the cap 55 is removed, and the cap 55 is attached again after the work is completed.

  The operation of the shutoff valve 1 in the meter box 3 configured as described above will be described. In a normal time before the occurrence of the earthquake, as shown in FIG. 3, the valve body 13 is open to open the communication opening 30 of the valve base 29, which is the water supply channel 14 inside the valve box 11. That is, the valve body 13 is in the water supply posture W <b> 1 and is along the virtual flow path direction center 4 at a position where the valve body 13 deviates from the virtual flow path direction center 4. In the water supply posture W <b> 1 of the valve body 13, water can be supplied to each door. The drive mechanism 21 in the water supply posture W1 of the valve body 13 is in the state shown in FIGS. 7B and 8, and the helical gear 39 is rotated clockwise about the valve shaft 19. At the same time, the presser member 47 is also rotated clockwise about the valve shaft 19.

  In the shutoff valve 1 of the present embodiment, the fitting portion between the valve shaft 19 and the bottom wall 22A of the first case 22, the assembly portion of the first case 22 and the lid 34, the support frame 34B and the watertight cover 25, a fitting portion between the ceiling wall 56A of the watertight cover 25 and the mounting rod 57, and an assembling portion between the bottom wall 23A of the second case 23 and the covering 51, respectively. -M10 are provided. Thus, since different members are attached via the seal member, even if rainwater or the like has entered the meter box 3, the inside of the first case 22 and the second case 23 is introduced. The intrusion of water is prevented so that the drive mechanism 21 and the electronic component group 33 are not immersed in water.

  When an earthquake of a predetermined seismic intensity or more occurs, the seismic detector 53 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 53. Thus, power is supplied from the batteries D and D to the motor M. Then, the motor M is driven, the drive bevel gear 52 rotates around its axis, and the driven bevel gear 35 meshed with the drive bevel gear 52 rotates around the shaft portion 35A and meshes with the shaft portion 35A. The spur gear 41 is rotated about its axis, and the drive rotary shaft 37 connected to the spur gear 41 and the worm 38 fitted around the drive rotary shaft 37 are rotated about the axis.

  Then, the helical gear 39 meshed with the worm 38 rotates, the valve shaft 19 connected to the helical gear 39 rotates about its axis, and the valve body 13 in the water supply posture W1 is the primary of the valve base 29. The water supply shutoff posture W2 (see FIG. 4) is brought into contact with the side surface 29A and the communication opening 30 is closed.

  In the water supply cutoff posture W2, the primary side fluid supply path (hereinafter referred to as “primary side water supply path”) and the secondary side fluid supply path (hereinafter referred to as “secondary side water supply path”) in the water supply path 14 are not in communication. The water supply in the valve box 11 is shut off. That is, water supply to each door is interrupted. The driving of the motor M is controlled by a timer, for example, and is set so that the valve body 13 assumes the water supply cutoff posture W2 when the driving is continued for a predetermined time.

  When the valve shaft 19 rotates, the presser member 47 fixed to the valve shaft 19 rotates counterclockwise around the axis of the valve shaft 19, and the drive mechanism 21 is in the state shown in FIGS. become. The helical gear 39 is rotated counterclockwise about the valve shaft 19, and the presser member 47 is rotated counterclockwise about the valve shaft 19 (FIGS. 6 and 6). 8 (see the two-dot chain line). When the state shown in FIGS. 5 and 6 is reached, the LED is turned on or blinked to notify the third party of the state in which the water supply in the water supply channel 14 is interrupted. In this case, the notification of the LED is performed based on the detection signal of the magnetic sensor.

  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 K is composed of the three cases 22, 23, 25. However, the casing K can 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 38 and the helical gear 39 meshed with the worm 38. However, the speed reduction mechanism may be configured by the worm and the worm wheel meshed with the worm. In addition, the speed reduction mechanism may be constituted by 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-described embodiment, the rotary shaft 24A is separated from the drive rotary shaft 37 by the contact member 49 in the open position of the valve body 13. However, the rotary shaft 24A is separated from the drive rotary shaft 37 by a spring or an elastic body. It may be configured to move and urge toward the side to be made.

  Moreover, although the said embodiment demonstrated the case where the shut-off valve 1 was arrange | positioned in the water supply piping in the meter box 3, the shut-off valve is provided in the appropriate place of the water supply piping (water pipe) between a distribution pipe and the faucet of each door. 1 may be installed. For example, the shut-off valve 1 can be installed on a pipe shaft installed in an apartment (or factory, hospital, etc.). The pipe shaft is arranged in the horizontal direction or in the vertical direction.

  Moreover, in the said embodiment, it comprised so that the valve body 13 may be changed into the water supply interruption | blocking attitude | position W2 from the water supply attitude | position W1 by detecting the earthquake using the earthquake detector 53 which detects the earthquake beyond a predetermined seismic intensity. As the seismic detector 53, a seismic device, an acceleration sensor or the like is used, and the valve body 13 is changed from the water supply posture W1 to the water supply cutoff posture W2 by detecting a predetermined seismic intensity and acceleration. However, the present invention is not limited to the configuration in which the valve body 13 is changed from the water supply posture W1 to the water supply cutoff posture W2 by detecting an earthquake.

  For example, when tap water exceeds a predetermined flow rate due to pipe breakage of the water pipe (including the inside of the meter box 3 and others) or abnormality of equipment such as a water pump (not shown), this is detected by a flow sensor. Then, it is conceivable to configure the valve body 13 from the water supply posture W1 to the water supply cutoff posture W2. Alternatively, when tap water exceeds a predetermined pressure due to abnormality of equipment such as a valve or a water supply pump arranged on the primary side with respect to the meter box 3, this is detected by a pressure sensor, and the valve body 13 is supplied with water. It can be considered that the posture is changed from the posture W1 to the water supply cutoff posture W2. Furthermore, when the tap water exceeds a predetermined temperature due to an abnormality in the equipment, it is possible to detect this by a temperature sensor and to configure the valve body 13 from the water supply posture W1 to the water supply cutoff posture W2. It is done.

  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, although the case where the rotating shaft 24A of the rotation operation unit 24 is manually rotated has been described in the above embodiment, the rotating shaft 24A may be rotated using power. As the power in this case, the motor M shown in FIG. 10 may be used, or another actuator may be used.

  Moreover, in the said embodiment, although the drive mechanism 21 was comprised from many gears 38, 39, 41, it is good also as a structure which replaces with this and the valve shaft 19 and the motor M axis | shaft are directly connected with a gear. In this case, the rotary shaft 24A may be directly connected to the valve shaft with a gear.

  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.

  DESCRIPTION OF SYMBOLS 1 ... Shut-off valve, 2 ... Water supply piping structure, 3 ... Meter box, 3A ... Bottom wall, 3B ... Side wall, 4 ... Virtual flow direction center, 5 ... Stop cock, 6 ... Water meter, 7 ... Inflow pipe, DESCRIPTION OF SYMBOLS 8 ... Upstream opening, 9 ... Outflow pipe, 10 ... Downstream opening, 11 ... Valve box, 11a ... Upper surface, 12 ... Base, 13 ... Valve body, 14 ... Water supply path, 15-18 ... Joint part, 19 ... Valve Shaft, 19a ... Stepped surface, 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 ... rotation operation part, 24A ... rotating shaft, 25 ... watertight cover, 25A ... top wall, 25B ... side wall, 26 ... primary side opening, 27 ... secondary side Opening side opening, 28 ... Valve body housing part, 29 ... Valve base, 29A ... Primary side surface, 30 ... Communication opening part opening part, 31, 32 ... Protruding part 33 ... electronic component group 34 ... lid body 34A ... receiving plate 34B ... support frame 34a ... fitted part 35 ... driven bevel gear 35A ... shaft part 36 ... gear mechanism 37 ... Drive rotating shaft, 37N ... screw, 38 ... worm, 39 ... helical gear, 39A ... tooth portion, 40 ... one-way clutch, 40A ... rotating body, 40B ... disc-like member, 40a ... locking claw (locking portion), 40a , 40c: locking part, 40b: end face, 41 ... spur gear, 42 ... support column, 43 ... bracket, 43A ... bottom wall, 43B ... vertical wall, 44 ... cylindrical part, 45 ... manual operation handle, 45A ... shaft , 47 ... Pressing member, 48 ... Mounting bolt, 49 ... Contact member, 49A ... Small diameter cylindrical part, 49A ... Contact part, 49B ... Large diameter cylindrical part, 49C ... Connection part, 49D ... Contact part, 49d ... Vertical wall part, 49e ... Horizontal part, 50 ... Vertical wall, 51 ... Covering body 52 ... Drive bevel gear, 52A ... Drive shaft, 53 ... Earthquake detector, 54 ... Insertion hole, 55 ... Cap, 56 ... Cover wall, 56A ... Ceiling wall, 57 ... Mounting rod, 57A ... Rotated manipulator, B1 ... Bolt, D ... battery, H ... permanent magnet, K ... casing, L ... longitudinal direction, M ... motor, m1-m10 ... sealing member, S ... short direction, W1 ... water supply posture, W2 ... water supply cutoff posture

Claims (5)

A valve body that can be switched between an open position and a closed position by rotating, a drive mechanism that is linked to the valve body, and the drive mechanism that drives the valve body in the open position to switch to the closed position in an emergency. An actuator for power supply, a battery for supplying electric power to the actuator, a rotation operation unit for rotating the valve body to switch the valve body at the closed position to an open position, a casing for housing the drive mechanism, the actuator, and the battery With
The rotation operation unit is composed of a rotation shaft that is rotatably supported in the casing, and a protrusion that protrudes outside the casing from the rotation shaft,
A one-way clutch that transmits the rotational force of the rotary shaft to the valve body only when the valve body in the closed position is switched to the open position is provided between the valve body and the rotary shaft of the rotation operation unit. A shut-off valve characterized by.   The forcible disconnecting means for forcibly disengaging the one-way clutch so as not to transmit the rotational force of the rotating shaft to the valve body when the valve body is located in the open position. The shut-off valve according to 1.   The valve body is attached to a rotatable valve shaft, and the drive mechanism includes a drive rotation shaft in which a worm is fitted and a helical gear with which the worm meshes, and the valve shaft is attached to the helical gear, The shut-off valve according to claim 2, wherein the drive rotary shaft and the rotary shaft are connected via the one-way clutch.   One end of the drive rotation shaft and one end of the rotation shaft are brought into contact with each other, the rotation shaft is configured to be movable away from the drive rotation shaft, and moves in the axial direction along with the drive rotation of the drive rotation shaft. An abutting member is provided on the drive rotating shaft, and when the valve body at the closed position is switched to the open position, the abutting member abuts on the rotating shaft and operates toward the side separating the rotating shaft. The shut-off valve according to claim 3, wherein the forcible disconnecting means is configured to forcibly disengage the clutch.   The shutoff valve according to any one of claims 1 to 4, wherein the rotating shaft is rotatably supported by the casing via a sealing material.

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