JP5683881B2 - Valve open / close position locking device - Google Patents

Description

  The present invention relates to a valve opening / closing position locking device capable of fixing a handle for opening / closing operation in a fully open and fully closed position in a relatively small ball valve or the like.

  For example, a comparatively small ball valve is often used for controlling the flow rate and taking out various fluids by being attached to the middle or end of a pipe line or a container.

  In such a ball valve, a cylindrical wall is provided on the stem take-out side outside the valve body in which the valve body is rotatably incorporated, and an operation arm that protrudes to a radius is provided on the outer periphery of a cylindrical portion that is externally fitted to the cylindrical wall. A handle provided is coupled to the stem, and the valve body can be rotated between the open position and the closed position by the handle.

  The ball valve as described above is opened and closed by rotating the valve body with the handle by manual operation. However, when the handle is in the open or closed position, the handle is inadvertently hit by the handle and the external force is applied. If the handle is rotated or the vibration is applied, the opening of the valve body may change due to rotation of the handle, and in particular, if the handle in the closed position rotates unnecessarily, fluid may leak. In order to prevent this, the ball valve is provided with an opening / closing position locking device that fixes the handle in the open position and the closed position so that the handle does not turn unnecessarily.

  In a conventional ball valve closed position locking device, a lever protruding to the outside of a valve body is fitted with a lever handle for rotating the stem so that it can swing up and down, and a lever is mounted on the upper surface of the valve body. A stopper that restricts the range of movement of the handle and a groove in which the lever handle cannot be moved when the valve body is closed are provided, and the stem is urged upward and the lever handle downward urged by the spring, and closed by the spring. The lever handle at the position is held in the groove (see, for example, Patent Document 1).

JP 2000-161531 A

  By the way, a conventional ball valve equipped with a closed position locking device is designed and manufactured with a unique mechanism corresponding to the locking device, so there is no locking device that has already been used or remains in stock. It is impossible to improve the ball valve with a locking device by applying it to an existing ball valve. For this reason, if a ball valve with a locking device is required, the ball valve already in use is a new lock. It is necessary to replace the ball valve with a device, and there is a problem that the existing ball valve without a lock device remaining in stock must be disposed of.

  Therefore, the object of the present invention is to provide a lock function only by performing simple processing on the valve, and an existing valve that has already been used or has already been completed in stock is improved as it is with a lock device. It is an object of the present invention to provide a valve opening / closing position locking device that can be manufactured and can be newly manufactured.

In order to solve the above-described problems, the present invention provides a head having a cylindrical portion that is provided outside the valve body in which the valve body is rotatably mounted on the stem take-out side and is fitted on the cylindrical wall. A handle provided with an operating arm is coupled to the stem, and a valve is used to rotate the valve body between an open position and a closed position with the handle, and an outer surface of a cylindrical wall in the valve body A groove for opening position locking and a groove for closing position locking are provided on the surface along the tangential direction of the outer surface of the cylindrical wall so as to be arranged at a right angle in a plane, and the cylindrical portion of the handle is close to the operation arm A cylindrical portion horizontal hole penetrating along the width direction of the operation arm and the operation arm horizontal hole are provided in a parallel arrangement at a position on the base side of the operation arm, and the cylindrical portion horizontal hole It opens at the inner peripheral surface of this cylindrical part, and this When the handle is in the open position, the opening faces the open position locking groove, and when the handle is in the closed position, the opening faces the closed position locking groove, and the open position locking groove and the closed position locking groove are cylindrical. The operation shaft is provided so as to form a part of the horizontal hole, and the operation shaft is penetrated through the operation arm horizontal hole so as to be movable in the axial direction. A lock shaft that can be engaged with and disengaged from the groove for locking the open position or the groove for locking the closed position by fitting to the hole so that it can move in the axial direction from one end side and moving together with the operation shaft. The operating shaft is urged to move elastically in a direction in which the lock shaft is always engaged with the groove for locking the open position or the groove for locking the closed position.

  The cylindrical portion horizontal hole is formed by drilling the cylindrical portion using a drilling tool, and the groove for opening position locking or the groove for locking the closed position is formed by punching the cylindrical portion horizontal hole with the drilling tool. When drilling, the outer peripheral surface of the cylindrical wall can be formed by scraping simultaneously.

  The operation shaft and the lock shaft are made of a single metal circular shaft material, and the U-shape of the operation shaft is folded back at an interval according to the arrangement of the operation arm horizontal hole and the cylindrical portion horizontal hole to form a lock shaft. The lock shaft is shorter than the operation shaft and is long enough to engage with the open position locking groove or the closed position locking groove at a position where the folded portion approaches one end side of the cylindrical portion lateral hole. The operation shaft has a length that allows the lock shaft to be detached from the open position locking groove or the closed position locking groove when the free end side is pushed toward the handle. Between the free end side of the operation shaft and the handle, a structure is provided in which a spring for biasing elasticity in a direction in which the lock shaft is engaged with the groove for the normally open position lock or the groove for the closed position lock is contracted. Can do.

  Here, the handle is fixed so as to rotate integrally by fastening the stem and the screw in a state in which the cylindrical portion of the head is fitted on the cylindrical wall. It is formed into a circular hole using a drilling tool such as a drill so as to be parallel to each other with a gap, and the cylindrical part lateral hole is applied in a tangential direction so as to open midway with respect to the inner peripheral surface of the cylindrical part, When drilling such a cylindrical portion lateral hole, the outer peripheral surface of the cylindrical wall is also scraped together to form either the open position locking groove or the closed position locking groove, and the other is drilled. The hole is formed by inserting a drilling tool into the horizontal hole of the cylindrical portion again and scraping the outer surface of the cylindrical wall with this drilling tool.

  The operation shaft and the lock shaft are inserted into the operation arm side hole and the cylindrical part side hole from one side of the handle, and pass through the operation arm side hole and protrude to the other side of the handle. The operation cap is fitted and fixed, and a spring is fitted and contracted between the cap and the handle facing the operation shaft, and the operation shaft is elastic in the direction in which the lock shaft is always pulled into the cylindrical hole. Energized.

  When the handle is in the open position, the lock shaft drawn into the cylindrical portion horizontal hole by the spring fits into both the cylindrical portion horizontal hole and the groove for locking the open position. Is fixed to the cylindrical wall, and the handle is locked in a non-rotating state.

  If the rear end side of the operation shaft is pushed toward the operation arm through the operation cap in the above state, the lock shaft that moves integrally is released from the groove for opening position locking, and the handle is unlocked from the cylindrical wall. The lock shaft can be rotated toward the closed position with the push-in state maintained, and when the operation shaft is released while the handle is in the closed position, the lock shaft is pulled into the horizontal hole of the cylindrical portion. Fits into the groove for locking the closed position, the handle is fixed to the cylindrical wall, and the handle is locked in a non-rotating state.

  According to the present invention, the opening position locking groove and the closing position locking groove are provided on the outer surface of the cylindrical wall provided on the valve body in a plane perpendicular arrangement, and the cylindrical portion of the handle coupled to the stem and the operation arm The valve can be locked with a simple process of drilling a horizontal hole at the base of the valve, and the existing valve that has already been used or has already been completed in stock can be processed at a lower cost. It can be improved with a locking device as it is, and a lock function can be added with a simple structure even in a newly manufactured valve.

  In addition, by simultaneously scraping the outer peripheral surface of the cylindrical wall at the time of drilling the cylindrical portion horizontal hole, by simultaneously scraping the groove for the open position lock or the groove for the closed position lock, at the same time as reducing the processing man-hours, The communicating portion between the cylindrical portion lateral hole and the groove can be finished into a highly accurate circular hole.

(A) is the perspective view which opened the handle of the ball valve which provided the opening-and-closing position locking device of this invention, (b) is the exploded perspective view of the ball valve which provided the opening-and-closing position locking device (A) is a longitudinal front view in which the handle of the ball valve provided with the opening / closing position locking device of the present invention is opened, and (b) is a cross-sectional plan view taken along arrow bb in (a). (A) is a longitudinal front view in which the handle of the ball valve provided with the opening / closing position locking device of the present invention is closed, and (b) is a cross-sectional plan view of the same. (A) is a plan view in which the handle of the ball valve provided with the opening / closing position locking device of the present invention is in an open state, (b) is a plan view in a state in which the handle is in an intermediate position for opening and closing, and (c) is a handle closed. Plan view in state (A) is an enlarged cross-sectional plan view showing the locked state when the handle of the opening / closing position locking device of the present invention is in the open position, with the operation shaft and the lock shaft being shown in plan view, and (b) is a diagram showing that the operation shaft is pushed in. A cross-sectional plan view showing a state in which the lock at the open position is released, (c) is a cross-sectional plan view in a state where the handle is rotated to an intermediate position of opening and closing. (D) is an enlarged cross-sectional plan view showing the operation shaft and the lock shaft in plan view before locking when the handle of the opening / closing position locking device of the present invention is in the closed position, and (e) is the handle in the closed position. Cross-sectional plan view showing the locked state when

  Hereinafter, embodiments of the present invention will be described on the basis of attached screens.

  As shown in the figure, the ball valve 1 accommodates a rotatable ball-shaped valve body 4 and valve seats 5 positioned on both sides of the valve body 4 in a valve body 3 through which the fluid passage 2 passes. A cylindrical wall 6 projects from the upper part of the outer surface of the valve body 3, and a stem 8 coupled so as to be rotatable integrally with the valve body 4 is accommodated in an inner peripheral hole 7 of the cylindrical wall 6. A handle 9 is fixed to the protruding upper end portion drawn out from the wall 6, and the valve body 4 is rotated by the handle 9 so that the fluid can be flowed and closed.

  The handle 9 has a structure in which a lower portion of the head 10 is a cylindrical portion 11 that is fitted on the cylindrical wall 6, and an operation arm 12 that protrudes radially from the upper portion of the cylindrical portion 11 to the outer periphery of the head 10 is provided. In the state in which the cylindrical portion 11 is fitted on the cylindrical wall 6, the screw 13 is fixed to the stem 8 by fastening with the screw 13 screwed from the upper portion of the head 10 toward the upper end portion of the stem 8, and the screw 13 is fixed to the upper end of the head 10. It is made invisible by putting the cap 14 on the recess.

  As shown in FIG. 1B, an arc-shaped stopper wall 15 is provided on the outer periphery of the upper end portion of the cylindrical wall 6, and the rotation angle restricting plate 16 is externally fitted in the middle of the stem 8 so as to rotate integrally. The rotation angle of the handle 9 is restricted to 90 ° by the wall 15 and the rotation angle restricting plate 16, so that the handle 9 that rotates the valve body 4 to the open position and the closed position in the direction of the fluid passage 2. It is possible to rotate between an open position where the operation lever 12 is parallel and a closed position perpendicular to the direction of the fluid passage 2.

  As shown in FIGS. 5 and 6, the open / close position locking device 17 provided in the ball valve 1 includes an open position locking groove 18 having an arcuate cross section provided on the outer surface of the cylindrical wall 6 in the valve body 3 and a closed position. A groove 19 for position locking and a cylindrical portion provided so as to penetrate along the width direction of the operation arm 12 at a position close to the operation arm 12 in the cylindrical portion 11 of the handle 9 and a position on the base side of the operation arm 12. A horizontal hole 20 and an operating arm horizontal hole 21, an operating shaft 22 penetrated through the operating arm horizontal hole 21 so as to be movable in the axial direction, and one end portion of the operating shaft 22 are provided continuously to the cylinder. A lock shaft 23 that is fitted to the horizontal hole 20 so as to be movable in the axial direction from one end side, and a spring 24 that urges movement elasticity in a direction in which the lock shaft 23 always enters the operation shaft 22. Has been.

The groove 18 for locking the open position is in a position where the length direction of the operating arm 12 is directed when the handle 9 is in the open position on the outer surface of the cylindrical wall 6, and the groove 19 for closing the position lock is formed on the cylindrical wall. 6 is provided along the tangential direction of the outer surface of the cylindrical wall at the position where the length direction of the operation arm 12 faces when the handle 9 is in the closed position on the outer surface of the cylinder 6, and is used for locking the open position as shown in FIG. The groove 18 and the closed position locking groove 19 are arranged at right angles in a plane.

  Both the cylindrical portion lateral hole 20 and the operating arm lateral hole 21 have the same diameter, and the tubular portion lateral hole 20 includes an open position locking groove 18 and a closed position locking groove provided in the cylindrical wall 6. 19 is provided in the cylindrical portion 11 so as to be at a height position equal to 19, and the middle is opened in the inner peripheral surface of the cylindrical portion 11, and the opening is used for locking the open position when the handle 9 is in the open position. Faces the groove 18 and faces the closed position locking groove 19 when the handle 9 is in the closed position, and the open position locking groove 18 and the closed position locking groove 19 form a part of the cylindrical portion lateral hole 20. It is supposed to be.

  Further, the operation arm lateral hole 20 is provided at a position on the base side close to the cylindrical portion 11 of the operation arm 12 so as to penetrate the operation arm 12 in the width direction, and the operation arm lateral hole 21 is illustrated in FIG. In this way, the operation arm lateral hole 21 and the tubular part lateral hole 20 are arranged in parallel with each other with a predetermined distance from the tubular part lateral hole 20 at a predetermined distance.

  The operation shaft 22 and the lock shaft 23 use one metal wire that can be inserted into the operation arm lateral hole 21 and the cylindrical portion lateral hole 20, and have one end that is the front end side of the operation shaft 22 that is a straight line. The operation shaft 22 and the lock shaft 23 are coupled with each other by returning them in a folded arc shape. The operation shaft 22 and the lock shaft 23 are parallel to each other with a plane U-shaped parallel to the arrangement of the operation arm lateral hole 21 and the cylindrical portion lateral hole 20. It is in the shape.

  The operation shaft 22 has a length sufficient to penetrate the entire length of the operation arm lateral hole 21, whereas the lock shaft 23 is slightly shorter than the entire length of the cylindrical portion lateral hole 20.

  The operation shaft 22 and the lock shaft 23 are inserted into the operation arm lateral hole 21 and the cylindrical portion lateral hole 20 from one side surface of the handle 9 and become a free end of the operation shaft 22 protruding from the other side surface of the handle 9. An operation cap 25 is externally fitted and fixed to the rear end, and a spring 24 is externally fitted to the operation shaft 22 between the opposing surfaces of the operation cap 25 and the handle 9. A lock shaft 23 is formed in a cylindrical shape on the operation shaft 22. The elasticity of the direction which always draws in the part horizontal hole 20 is urged.

  The operation shaft 22 passes through the operation arm lateral hole 21 so as to be movable in the axial direction, the lock shaft 23 is fitted to the cylindrical portion lateral hole 20 so as to be movable in the axial direction, and the handle 9 is When in the open position or the closed position, the lock shaft 23 is engaged with the groove 18 for locking the open position or the groove 19 for locking the closed position without pushing the operating shaft 22, and the cylindrical wall 6 is engaged. The handle 9 is locked so as not to rotate.

  When the operation shaft 22 is pushed toward the handle 9 against the elasticity of the spring 24 when the handle 9 is in the open position or the closed position, the lock shaft 23 that moves integrally with the operation shaft 22 is free. The end moves to the end of the cylindrical portion lateral hole 20 and comes off the open position locking groove 18 or the closed position locking groove 19, whereby the handle 9 is unlocked from the cylindrical wall 6, and the handle 9 can be rotated between an open position and a closed position.

  The operating arm lateral hole 21 and the cylindrical part lateral hole 20 provided in the handle 9 are processed by using a drilling tool such as a drill. When drilling the cylindrical part lateral hole 20, for example, the handle 9 is opened. In this state, along the tangential direction so that the center passes between the inner peripheral surface of the cylindrical portion 11 and the outer peripheral surface of the cylindrical wall 6 at a position close to the operation arm 12 of the cylindrical portion 11 in this state. The cylindrical portion lateral hole 20 is drilled.

  When the cylindrical portion side hole 20 is drilled under such conditions, the middle portion of the cylindrical portion side hole 20 is opened at the inner peripheral surface of the cylindrical portion 11, and at the same time, the outer peripheral surface of the cylindrical wall 6 is scraped off. The cylindrical portion horizontal hole 20 and the open position locking groove 18 can be simultaneously processed by a single drilling, and the cylindrical portion horizontal hole 20 and the open position locking groove 18 form one horizontal hole. Will be formed.

  When the groove 19 for locking the closed position is formed in the cylindrical wall 6, the cylindrical portion horizontal hole 20 is drilled as described above, and then the handle 9 is rotated to the closed position to provide the cylindrical portion 11. The drilling tool may be inserted again into the cylindrical part lateral hole 20 and the outer peripheral surface of the cylindrical wall 6 facing the opening of the cylindrical part lateral hole 20 may be scraped off with the drilling tool.

  Contrary to the above, the cylindrical portion lateral hole 20 and the closed position locking groove 19 may be processed first, and the open position locking groove 18 may be formed later.

  As described above, when the ball valve 1 is provided with the opening / closing position locking device 17, it is only necessary to drill the cylindrical portion lateral hole 20 and the operation arm lateral hole 21 in the ball valve 1. The open / close position lock function can be easily and inexpensively added to ball valves that are already in use or in stock, and new ball valves are inexpensive without changing the basic structure. An opening / closing position lock function can be added to the.

  In the example shown in the figure, the ball valve 1 has an open position of the handle 9 parallel to the fluid passage 2 and a closed position perpendicular to it. However, the open / close position of the handle 9 can be selected, and Although the body 3 is linear and has a male screw 26 at one end and a female screw 27 at the other end for connection with the pipe, the type of the ball valve 1 is not limited in any way. Examples thereof include an angle shape in which a connection portion is provided at one end side and a lower portion, and a connection portion using a nipple or a one-touch joint for connection to a pipe.

  The valve opening / closing position locking device of the present invention is configured as described above, and the ball valve 1 is attached to the middle or end of a pipeline, a container, and is used for flow control and extraction of various fluids. As shown in FIG. 2 (a), when the handle 9 is in the open position, the valve body 4 is in a valve-open state in which the fluid passage 2 is conducted, and when the handle 9 is in the closed position as shown in FIG. 3 (a). The valve body 4 is in a closed state in which the fluid passage 2 is blocked.

  In the ball valve 1, when the operation shaft 22 is not pushed in while the handle 9 is in the open position, the lock shaft 23 is moved by the elasticity of the spring 24 as shown in FIG. The lock shaft 23 is engaged with the groove 18 for locking the open position of the cylindrical wall 6 over substantially the entire length, and this engaging portion serves as a detent of the handle 9 with respect to the cylindrical wall 6. Since the handle 9 is locked at the open position, the valve 9 is kept open even if vibration or an external force is applied to the handle 9.

  To change the ball valve 1 from the open state to the closed state, as shown in FIG. 5B, when the operation shaft 22 is pushed toward the handle 9 against the elasticity of the spring 24, the operation shaft 22 is operated. The lock shaft 23 is moved in a direction to be removed from the cylindrical portion lateral hole 20, and the free end thereof is moved to the end portion of the cylindrical portion lateral hole 20 to be disengaged from the open position locking groove 18, thereby Then, the lock of the handle 9 with respect to the cylindrical wall 6 is released, and the handle 9 can be rotated to the open position while the operation shaft 22 is pushed in as shown in FIG.

  When the handle 9 is rotated to the open position as shown in FIG. 6 (d), it is only necessary to release the pushing of the operating shaft 22, and as shown in FIG. 6 (e), the operating shaft 22 is pulled back by the extension of the spring 24. The lock shaft 23 that moves integrally therewith is also pulled back into the cylindrical portion lateral hole 20, and this lock shaft 23 is engaged with the groove 19 for locking the closed position of the cylindrical wall 6 over substantially the entire length. The portion becomes a detent of the handle 9 with respect to the cylindrical wall 6 and the handle 9 is locked in the closed position, so that the valve closed state is maintained even if vibration or an external force acts on the handle 9.

  Further, the valve closing state can be changed to the valve opening state by releasing the lock by pushing the operating shaft 22 and turning the handle 9 as described above.

DESCRIPTION OF SYMBOLS 1 Ball valve 2 Fluid passage 3 Valve body 4 Valve body 5 Valve seat 6 Cylindrical wall 7 Inner peripheral hole 8 Stem 9 Handle 10 Head 11 Cylindrical part 12 Operation arm 13 Screw 14 Cap 15 Stopper wall 16 Rotation angle control plate 17 Opening / closing position Locking device 18 Open position locking groove 19 Closed position locking groove 20 Cylindrical side hole 21 Operation arm side hole 22 Operation shaft 23 Lock shaft 24 Spring 25 Operation cap 26 Male thread 27 Female thread

Claims (3)

A handle having a cylindrical wall provided on the stem take-out side outside the valve body in which the valve body is rotatably incorporated, and having an operation arm on a head having a cylindrical portion fitted on the cylindrical wall is coupled to the stem. Using this valve, the valve body can be rotated between the open position and the closed position,
On the outer surface of the cylindrical wall in the valve body, an open position locking groove and a closed position locking groove are provided along the tangential direction of the outer surface of the cylindrical wall so as to be arranged at a right angle in a plane.
In the cylindrical portion of the handle, a cylindrical portion horizontal hole penetrating along the width direction of the operation arm and a position parallel to the operation arm are provided in a parallel arrangement at a position close to the operation arm and a position on the base side of the operation arm.
The cylindrical part side hole opens in the middle on the inner peripheral surface of the cylindrical part, and this opening faces the groove for locking the open position when the handle is in the open position, and when the handle is in the closed position. Facing the closed position locking groove, the open position locking groove and the closed position locking groove are provided so as to form a part of the cylindrical portion lateral hole,
The operation shaft is penetrated through the operation arm lateral hole so as to be movable in the axial direction, and is fitted to one end portion of the operation shaft so as to be movable in the axial direction from one end side with respect to the cylindrical portion lateral hole. In addition, by moving integrally with the operation shaft, a lock shaft that can be engaged and disengaged with respect to the groove for locking the open position or the groove for locking the closed position is provided.
An opening / closing position locking device for a valve in which the operation shaft is biased by movement elasticity in a direction in which the lock shaft is always engaged with the groove for opening position locking or the groove for closing position locking.   The cylindrical portion horizontal hole is formed by drilling the cylindrical portion using a drilling tool, and the groove for opening position locking or the groove for locking the closed position is formed by punching the cylindrical portion horizontal hole with the drilling tool. The valve opening / closing position locking device according to claim 1, wherein the valve is formed by simultaneously scraping an outer peripheral surface of the cylindrical wall when drilling.   The operation shaft and the lock shaft are made of a single metal circular shaft material, and the U-shape of the operation shaft is folded back at an interval according to the arrangement of the operation arm horizontal hole and the cylindrical portion horizontal hole to form a lock shaft. The lock shaft is shorter than the operation shaft and is long enough to engage with the open position locking groove or the closed position locking groove at a position where the folded portion approaches one end side of the cylindrical portion lateral hole. The operation shaft has a length that allows the lock shaft to be detached from the open position locking groove or the closed position locking groove when the free end side is pushed toward the handle. 3. A spring for urging elasticity in a direction in which the lock shaft engages with a groove for locking the normally open position or a groove for locking the closed position is provided between the free end of the operation shaft and the handle. A valve opening / closing position locking device according to claim 1.

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