JP2018204667A - Handle for valve with locking mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve security and prevent erroneous operation by preventing only an administrator from operating a valve and only an administrator from operating the valve, and when the valve is applied to existing equipment, the valve can be operated. To provide a valve handle with a lock mechanism that can be directly attached to the rotating shaft that opens and closes the valve used in existing equipment without the need to replace the rotating shaft that opens and closes the valve. SOLUTION: A lock mechanism 2 is detachably attached to a main body portion 3 to which a handle H is attached, a locking mechanism 5, and a tip end portion of a rotary shaft 1, and the main body portion 3 and the rotary shaft 1 are engaged with each other. The engagement mechanism 6 transmits the rotation operation of the handle H to the rotation shaft 1, and the attachment mechanism 7 attaches the main body 3 to the engagement mechanism 6 so as to be relatively rotatable and detachable. [Selection diagram] Fig. 1-8

Description

  The present invention relates to a valve handle for operating a valve, and more particularly to a valve handle with a lock mechanism.

2. Description of the Related Art Conventionally, for example, in a facility such as a factory or a plant, a handle is attached to operate a valve installed to open and close a conduit through which a fluid flows.
The operator opens and closes the pipe line by rotating the handle.

  By the way, in recent years, in order to improve security and prevent misoperation, only a person with administrative authority (hereinafter referred to as "administrator") can operate the valve, and a locking mechanism that prevents only the administrator from operating the valve. There is a need for a valve with

  On the other hand, the present applicant has previously proposed a valve device provided with a locking mechanism that allows only the administrator to operate the valve and prevents only the administrator from operating the valve (see Patent Document 1).

JP-A-2015-200401

By the way, the valve device described in Patent Document 1 only rotates the handle at the time of locking, and the rotation of the handle is effective only at the time of unlocking. Therefore, only the administrator having the key can operate the valve. Other than the above, by making the valve inoperable, there is an advantage that security can be improved and erroneous operation can be prevented.
On the other hand, since the locking mechanism is integrated with the rotary shaft that opens and closes the valve, when this valve device is applied to existing equipment, it is necessary to replace the entire valve or at least the rotary shaft that opens and closes the valve. There is a problem that the operation of the equipment must be stopped once, and there is a problem that the replacement work takes time and costs are high.

  In view of the problems of the valve device described in Patent Document 1, the present invention is an advantage of the valve device described in Patent Document 1, and only the administrator can operate the valve, and only the administrator can operate the valve. By doing so, it is possible to improve security and prevent erroneous operation, but when applied to existing equipment, there is no need to replace the rotating shaft that opens and closes the valve. An object of the present invention is to provide a valve handle with a lock mechanism that can be directly attached to a rotary shaft that opens and closes a valve used in the above.

  To achieve the above object, a valve handle with a lock mechanism according to the present invention includes a handle for rotating a rotary shaft for opening and closing the valve, and a state in which the rotary operation of the handle is transmitted to the rotary shaft. And a valve handle with a lock mechanism having a lock mechanism for switching between the state to prevent transmission to the rotating shaft, the lock mechanism being attached to a main body portion to which the handle is attached, a locking mechanism, and a tip portion of the rotating shaft. An detachable attachment, an engagement mechanism that engages the main body portion and the rotation shaft, and transmits the rotation operation of the handle to the rotation shaft; and the main body portion is rotatable relative to the engagement mechanism; and An attachment mechanism that is detachably attached. When the locking mechanism is in an unlocked state, the main body and the engagement mechanism are locked, and the handle and the rotary shaft are engaged via the main body and the engagement mechanism. The rotation operation of the handle is transmitted to the rotation shaft, and when the locking mechanism is in the locked state, the lock state between the main body portion and the engagement mechanism is released, and the handle via the main body portion and the engagement mechanism is The engagement with the rotation shaft is released so that the rotation operation of the handle is not transmitted to the rotation shaft.

  In this case, the locking mechanism can be provided with a push button that protrudes when in the unlocked state, enters the locked state when pushed, and returns to the projected state when unlocked.

  According to the valve handle with a lock mechanism of the present invention, the handle for rotating the rotary shaft for opening and closing the valve, the state in which the rotation operation of the handle is transmitted to the rotary shaft, In a valve handle with a lock mechanism having a lock mechanism that switches between a state that prevents transmission, the lock mechanism is detachably attached to a main body portion to which the handle is attached, a locking mechanism, and a distal end portion of a rotating shaft. An engagement mechanism that engages the main body portion with the rotation shaft and transmits the rotation operation of the handle to the rotation shaft; and a main body portion that is attached to the engagement mechanism so as to be relatively rotatable and detachable. And when the locking mechanism is in the unlocked state, the main body and the engaging mechanism are locked, and the handle and the rotating shaft are engaged via the main body and the engaging mechanism. The rolling operation is transmitted to the rotating shaft, and when the locking mechanism is in the locked state, the locked state of the main body portion and the engaging mechanism is released, and the handle and the rotating shaft via the main body portion and the engaging mechanism are engaged. By canceling the connection and preventing the rotation operation of the handle from being transmitted to the rotating shaft, only the administrator can operate the valve, and only the administrator can operate the valve. When it is applied to existing equipment, it is not necessary to replace the rotating shaft that opens and closes the valve, and it is directly connected to the rotating shaft that opens and closes the valve used in the existing equipment. It can be made to be wearable.

  In addition, the locking mechanism is provided with a push button that protrudes when in the unlocked state, enters a locked state when pressed, and returns to the protruding state when unlocked, so that the locking mechanism is unlocked and locked. It can be judged from the appearance whether it is in any of the states.

It is explanatory drawing of the replacement | exchange method (1) which shows 1st Example of the handle | steering_wheel for valves with a locking mechanism of this invention. It is explanatory drawing of the replacement | exchange method (2) of the handle | steering_wheel for valves with the same locking mechanism. It is explanatory drawing of the replacement method (3) of the handle | steering_wheel for valves with the same locking mechanism. It is an exploded view of the valve handle with the lock mechanism. FIG. 2 is a component diagram (1) of the valve handle with the lock mechanism. It is component drawing (2) of the handle | steering_wheel for valves with the same locking mechanism. It is an exploded view of the locking mechanism of the valve handle with the locking mechanism. It is explanatory drawing at the time of unlocking of the handle | steering_wheel for valves with the same locking mechanism. It is explanatory drawing at the time of locking of the handle | steering_wheel for valves with the same locking mechanism. It is operation explanatory drawing (1) of the handle | steering_wheel for valves with the same locking mechanism. It is operation explanatory drawing (2) of the handle | steering_wheel for valves with the same locking mechanism. It is operation explanatory drawing (3) of the handle | steering_wheel for valves with the same locking mechanism. It is explanatory drawing of the replacement | exchange method (1) which shows 2nd Example of the handle | steering_wheel for valves with a locking mechanism of this invention. It is explanatory drawing of the replacement | exchange method (2) of the handle | steering_wheel for valves with the same locking mechanism. It is explanatory drawing of the replacement method (3) of the handle | steering_wheel for valves with the same locking mechanism. It is an exploded view of the valve handle with the lock mechanism. FIG. 2 is a component diagram (1) of the valve handle with the lock mechanism. It is component drawing (2) of the handle | steering_wheel for valves with the same locking mechanism. It is explanatory drawing at the time of unlocking of the handle | steering_wheel for valves with the same locking mechanism. It is explanatory drawing at the time of locking of the handle | steering_wheel for valves with the same locking mechanism. It is operation explanatory drawing (1) of the handle | steering_wheel for valves with the same locking mechanism. It is operation explanatory drawing (2) of the handle | steering_wheel for valves with the same locking mechanism.

  Embodiments of a valve handle with a lock mechanism according to the present invention will be described below with reference to the drawings.

FIGS. 1-1 to 1-12 show a first embodiment of the valve handle with a locking mechanism of the present invention.
In this embodiment, the valve handle with a locking mechanism of the present invention is applied to a ball valve.

  The valve handle with a lock mechanism includes a handle H that rotates the rotary shaft 1 that opens and closes the valve V, a state in which the rotation operation of the handle H is transmitted to the rotary shaft 1, A lock mechanism 2 that switches between a state that prevents transmission to the rotary shaft 1 is provided, and this lock mechanism 2 is attached to a main body portion 3 to which a handle H is attached, a locking mechanism 5, and a tip portion of the rotary shaft 1. An engagement mechanism 6 that is detachably attached, engages the main body portion 3 and the rotary shaft 1, and transmits the rotation operation of the handle H to the rotary shaft 1, and the main body portion 3 is relative to the engagement mechanism 6. And an attachment mechanism 7 that is attached to be detachable.

  When the locking mechanism 5 is in the unlocked state, the main body 3 and the engagement mechanism 6 are locked, and the handle H and the rotary shaft 1 are engaged via the main body 3 and the engagement mechanism 6. When the rotation operation of the handle H is transmitted to the rotary shaft 1 and the locking mechanism 5 is in the locked state, the locked state between the locking mechanism 5 and the engaging mechanism 6 is released, and the main body 3 and the engaging mechanism 6 are moved. The engagement between the handle H and the rotary shaft 1 is released so that the rotation operation of the handle H is not transmitted to the rotary shaft 1.

The engagement mechanism 6 that is detachably attached to the tip of the rotating shaft 1 is cylindrical, and preferably can be easily replaced by an operator so that the workability can be improved. A bearing portion 60 having a tapered surface, that is, a truncated cone shape is formed so that the tip side gradually becomes smaller in diameter, and a ball 61 is provided in the bearing portion 60 so as to be able to appear and retract.
The bearing portion 60 is fitted to the tip portion of the rotary shaft 1 and is fixed using a nut N.
Here, it is preferable that the nut N can be operated only by a special dedicated tool T2, as shown in FIG. 2-1 of the second embodiment described later.

  The balls 61 are inserted into the ball insertion holes 66 formed at equal angular intervals in the bearing portion 60, but the number of the balls 61 can be arbitrarily set.

The O-ring 62 is attached to the bearing portion 60 so as to circumscribe each ball 61 so that the ball 61 does not fall off during the replacement work by the operator.
The size of the opening on the inner peripheral side of the ball insertion hole 66 into which the ball 61 is inserted is formed to be smaller than the diameter of the ball 61 so that the ball 61 falls off during the replacement work by the operator. I try not to.

The main body 3 to which the handle H is attached has a substantially cylindrical shape, and a female screw for screwing a cap C for fixing the handle H is formed on the outer peripheral surface of the upper portion. 6 can be accommodated inside, and the push button 4 of the locking mechanism 5 protrudes from the opening end surfaces of the main body 3 and the cap C so that the pushing operation can be performed.
As a result, the push button 4 allows the appearance to determine whether the locking mechanism 5 is in the unlocked state or the locked state.
Here, the portion of the main body 3 that accommodates the engagement mechanism 6 is preferably formed in a truncated cone shape so that replacement work by an operator can be performed smoothly and workability can be improved. Corresponding to the bearing portion 60, the peripheral surface is formed in a tapered shape so that the rear side gradually becomes a small diameter.
Grooves 33 into which the balls 61 are fitted are formed in the axial direction on the inner peripheral surface of the main body 3 when the locking mechanism 5 is in the unlocked state.
In addition, a stopper S projecting from the valve V enters the main body 3 to form a notch 34 that regulates the rotation angle of the handle H to about 90 °.
Moreover, it is preferable that the cap C can be operated only by a special dedicated tool T1.

The main body 3 and the engagement mechanism 6 are configured such that the pin 71 constituting the attachment mechanism 7 is inserted into the main body 3 in a state where the engagement mechanism 6 is accommodated in the main body 3. It is fitted in a circumferential groove 63 formed on the outer peripheral surface of the bearing portion 60, and can freely rotate in a state of being prevented from coming off from the main body portion 3 when the locking mechanism 5 is in a locked state.
Here, for the pin 71, a stepped pin having a tapered shape and a tip formed in an R shape is used so that the assembly work by the operator can be smoothly performed and the workability can be improved. doing.
Further, although not particularly limited, in this embodiment, by using two pins 71, the load applied to each pin 71 is reduced and the durability is improved.

  The operator can perform the insertion / removal of the pins 71 constituting the attachment mechanism 7 with respect to the main body 3 so that the main body 3 can be easily attached to and detached from the engagement mechanism 6. I have to.

A retaining member 72 is attached to the main body 3 so as to be in contact with the end surface of the pin 71 so that the pin 71 inserted into the main body 3 does not come out except when performing attachment / detachment work.
Here, as the retaining member 72, a metal member, a rubber band, or the like can be used in addition to a spring member made up of a coil spring (multiple winding type), a C-type retaining ring (one winding type), a leaf spring, or the like.
Further, by forming the groove 31 into which the retaining member 72 enters the peripheral surface of the main body 3, the retaining member 72 made of a coil spring or a C-type retaining ring may be displaced from the position of the end surface of the pin 71. I am trying not to.

  In the locking mechanism 5 accommodated in the main body 3, the outer case 51 is fixed to the main body 3 by pins 32.

  The locking mechanism 5 includes a push button 4, an outer case 51, a front cylinder 52 and a rear cylinder 53 accommodated in the outer case 51, a pin tumbler 54 disposed between the front cylinder 52 and the rear cylinder 53, a driver pin 55, and the like. The main part is composed of locking mechanism parts. The outer case 51 and the rear cylinder 53 are fixed by pins 59. The locking mechanism 5 may be a mechanical type as well as a mechanical type.

  The push button 4 rotates together with the front cylinder 52 via the connecting pin 56 with respect to the outer case 51 of the locking mechanism 5 and can be pushed against the urging force of the spring 41.

The push button 4 is provided with a long hole 42 at an intermediate portion, and rotates together with the front cylinder 52 via a connecting pin 56 attached to the front cylinder 52, which is inserted into the long case 42 with respect to the outer case 51 of the locking mechanism 5. In addition, the spring 41 can be pushed in against the urging force.
The push button 4 is provided with a recess 43 on the outer peripheral surface at the rear position from the long hole 42, and is attached by a spring 58 whose back surface is supported by the inner peripheral surface of the outer case 51 when the push button 4 is pushed rearward. The lock cam 57 provided so as to be able to protrude and retract from the rear cylinder 53 is engaged with the recess 43 so that the push button 4 is pushed in.

The return to the protruding state of the push button 4 held in the pushed state is performed by unlocking the locking mechanism 5 using the key 8.
Specifically, by inserting the key 8 into the locking mechanism 5, it is pushed so that the boundary surface where the pin tumbler 54 and the driver pin 55 abut is positioned at the boundary surface between the front cylinder 52 and the rear cylinder 53. When the front cylinder 52 and the push button 4 are rotated by being rotated by rotating the button 8, the locking cam 57 fitted in the recess 43 is released, and the push button 4 returns to the protruding state. If the key 8 does not match the locking mechanism 5, the boundary surface where the pin tumbler 54 and the driver pin 55 contact does not come to the position of the boundary surface between the front cylinder 52 and the rear cylinder 53. After the push button 4 returns to the protruding state, the key 8 is rotated to the original position and pulled out from the locking mechanism 5.

  When the push button 4 is in the protruding state (unlocked state) (FIGS. 1-8), the main body 3 and the engagement mechanism 6 are engaged by the locking mechanism 5, and the rotation operation of the main body 3 by the handle H is performed. When the push button 4 is pushed (locked state) (FIG. 1-9) (FIG. 1-9), it is transmitted to the rotary shaft 1 through the engagement mechanism 6, and the main body 3 and the engagement mechanism 6 are Even when the engagement is released and the main body 3 is rotated by the handle H, only the main body 3 (and the locking mechanism 5) is rotated, that is, the main body 3 is idle with respect to the engagement mechanism 6. The rotation operation of the main body 3 by the handle H is prevented from being transmitted to the engagement mechanism 6 and the rotation shaft 1.

Specifically, when the push button 4 is in a protruding state by the ball push-up cam 65 attached to the rear end portion of the bearing portion 60, the ball 61, and the push button 4 by the screw 64, which constitutes the engagement mechanism 6, the ball 61 is Abutting on the ball push-up cam 65 and moving in the radial direction (outside), it is fitted into the groove 33 formed on the inner peripheral surface of the main body 3, and the main body 3 and the engagement mechanism 6 are interposed via the balls 61. The rotation of the main body 3 by the handle H is transmitted to the rotary shaft 1 via the engagement mechanism 6 and the main body 3 is rotated by the handle H. The valve V can be opened and closed.
On the other hand, when the push button 4 is pushed in, the ball 61 moves in the center direction (inner side), disengages from the groove 33 formed on the inner peripheral surface of the main body 3, and engages with the main body 3 by the ball 61. The engagement of the coupling mechanism 6 with the bearing portion 60 is released, the main body 3 is idled with respect to the engagement mechanism 6, and the rotation operation of the main body 3 by the handle H is performed by the engagement mechanism 6 and the rotating shaft 1. The valve V cannot be opened or closed even if the main body 3 is rotated by the handle H.

Here, as shown in FIG. 1-12, the display plate 9 can be attached to the rotating shaft 1 so as to rotate integrally with the engaging mechanism 6.
If the display position of the display plate 9 does not interfere with the retaining member 72, the display plate 9 can be displayed at the peripheral surface position of the main body 3 by providing the display plate 9 upward.
Thereby, at the position of the display plate 9, the rotation angle of the rotary shaft 1, that is, the open / closed state of the valve V can be determined by appearance.

  This valve handle with a lock mechanism prevents only the administrator who has the key 8 from operating the valve V, and only the administrator who does not have the key 8 can operate the valve, thereby improving security and preventing erroneous operation. For example, even when applied to existing equipment, as shown in FIG. 1-1, the handle H is removed from the rotary shaft 1 for opening and closing the valve V of the existing equipment, and this lock is applied. By attaching the valve handle with a mechanism, it is not necessary to replace the rotary shaft 1 for opening and closing the valve V, and the normal structure before the return to the original structure, that is, the valve handle with the lock mechanism is attached. The work of returning to the valve can be easily performed.

FIGS. 2-1 to 2-10 show a second embodiment of the valve handle with a locking mechanism of the present invention.
In this embodiment, the valve handle with a lock mechanism of the present invention is applied to a gate valve.

  The valve handle with a lock mechanism includes a handle H that rotates the rotary shaft 1 that opens and closes the valve V, a state in which the rotation operation of the handle H is transmitted to the rotary shaft 1, A lock mechanism 2 that switches between a state that prevents transmission to the rotary shaft 1 is provided, and this lock mechanism 2 is attached to a main body portion 3 to which a handle H is attached, a locking mechanism 5, and a tip portion of the rotary shaft 1. An engagement mechanism 6 that is detachably attached, engages the main body portion 3 and the rotary shaft 1, and transmits the rotation operation of the handle H to the rotary shaft 1, and the main body portion 3 is relative to the engagement mechanism 6. And an attachment mechanism 7 that is attached to be detachable.

  When the locking mechanism 5 is in the unlocked state, the main body 3 and the engagement mechanism 6 are locked, and the handle H and the rotary shaft 1 are engaged via the main body 3 and the engagement mechanism 6. When the rotation operation of the handle H is transmitted to the rotary shaft 1 and the locking mechanism 5 is in the locked state, the locked state between the locking mechanism 5 and the engaging mechanism 6 is released, and the main body 3 and the engaging mechanism 6 are moved. The engagement between the handle H and the rotary shaft 1 is released so that the rotation operation of the handle H is not transmitted to the rotary shaft 1.

The engagement mechanism 6 that is detachably attached to the distal end portion of the rotating shaft 1 includes a bearing portion 60. The bearing portion 60 is fitted to the distal end portion of the rotating shaft 1 and is fixed using a nut N.
Here, it is preferable that the nut N can be operated only by a special dedicated tool T2.

  The valve handle with a lock mechanism of the present embodiment is different from that applied to the ball valve of the first embodiment described above in that the handle H is rotated several times, so that the display plate 9 is not provided. Except for the above, the configuration and operation are the same as those of the first embodiment.

  As described above, the valve handle with a locking mechanism of the present invention has been described based on a plurality of embodiments. However, the present invention is not limited to the configuration described in the above embodiments, and may be appropriately selected without departing from the scope of the present invention. The configuration can be changed.

  The valve handle with a lock mechanism according to the present invention can be operated only by an administrator and cannot be operated by a person other than the administrator, thereby improving security and preventing erroneous operation. When applied to equipment, it is not necessary to replace the rotating shaft that opens and closes the valve, and it can be directly mounted on the rotating shaft that opens and closes the valve used in existing equipment. Regardless of the use of the handle for operating the valve installed to open and close the pipe through which the fluid flows in facilities such as factories, plants, etc. It can be widely used for applications.

DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Lock mechanism 3 Main-body part 4 Push button 5 Locking mechanism 6 Engagement mechanism 7 Attachment mechanism 8 Key 9 Display plate C Cap H Handle N Nut T1 Dedicated tool T2 Dedicated tool V Valve

Claims (2)

A handle for rotating the rotary shaft for opening and closing the valve, and a lock mechanism for switching between a state in which the rotational operation of the handle is transmitted to the rotary shaft and a state in which the rotational operation is not transmitted to the rotary shaft In a handle for a valve with a locking mechanism,
The lock mechanism is detachably attached to a main body portion to which a handle is attached, a locking mechanism, and a distal end portion of the rotary shaft, and engages the main body portion and the rotary shaft to transmit the rotation operation of the handle to the rotary shaft. And an attachment mechanism that attaches the main body to the engagement mechanism so as to be relatively rotatable and detachable.
When the locking mechanism is in the unlocked state, the main body and the engagement mechanism are locked, the handle and the rotation shaft are engaged via the main body and the engagement mechanism, and the rotation operation of the handle is performed on the rotation shaft. To be communicated,
When the locking mechanism is in the locked state, the locked state between the main body and the engagement mechanism is released, the engagement between the handle and the rotation shaft via the main body and the engagement mechanism is released, and the rotation operation of the handle rotates. A valve handle with a lock mechanism, characterized in that it is not transmitted to the shaft.   The locking mechanism according to claim 1, wherein the locking mechanism is provided with a push button that protrudes in an unlocked state, enters a locked state when pressed, and returns to a protruding state when unlocked. Handle for valve.

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