JP2013100894A - Valve opening/closing device and valve opening/closing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve opening/closing technology that achieves automation while an existing handle is attached.SOLUTION: A valve opening/closing device 30 includes: a base part 40 relative movement of which with respect to a handle 20 in a rotation direction of the handle 20 is regulated; a torque generating part 50 supported by the base part 40 while generating torque which reduces rotation of a motor 51; and a handle engaging part 60 engaged with the handle 20 and rotating the handle 20 by the torque in the rotation direction.

Description

  The present invention relates to a valve opening / closing technique for automatically opening and closing valves of various existing pipes.

When opening and closing a valve or the like, it is necessary to rotate the manual operation handle several hundred times or more with a human hand, which takes time.
As a conventional valve opening / closing device, a technique is disclosed in which a handle is connected to a valve shaft via a gear reduction mechanism, and the valve shaft is rotated by operating the handle with a small operating torque (for example, Patent Document 1).

JP 2010-164115 A

In the conventional technique, after the existing handle is removed from the valve shaft, the operation of attaching the handle with a gear reduction mechanism to the valve shaft occurs, and thus time is required for preparation.
On the other hand, when performing valve opening / closing work in a radiation environment, it is required to reduce the restraint time of workers in order to reduce the exposure dose.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a valve opening / closing technique that realizes automation in a state where an existing handle is mounted.

  A valve opening / closing device according to an embodiment of the present invention includes a base portion in which movement of a valve handle in a rotation direction is restricted, and a torque generation portion that is supported by the base portion and generates torque that decelerates rotation of a motor. And a handle engaging portion that engages with the valve handle and rotates the valve handle in the rotational direction by the torque.

  Each embodiment of the present invention provides a valve opening / closing technique that realizes automation while an existing handle is mounted.

(A) Top view of handle of valve to which valve opening / closing device according to first embodiment is applied, (B) Side view of the valve, (C) Cross section of the valve. (A) Side part sectional drawing of the valve | bulb opening / closing apparatus which concerns on 1st Embodiment, (B) The top view of the fixing member fixed to a valve main body. (A) Top view of valve opening / closing apparatus according to the first embodiment, (B) Bottom view thereof. (A) (B) Operation | movement explanatory drawing of the fixing member fixed to a valve main body, (C) The modification of a fixing member. (A) Side view of the valve to which the valve opening / closing device according to the second embodiment is applied, (B) Side sectional view of the valve opening / closing device according to the second embodiment. The exploded view of the valve opening and closing device concerning a 2nd embodiment. (A) The side fragmentary sectional view which shows the modification of the valve | bulb opening / closing apparatus which concerns on 2nd Embodiment, (B) The side view of the fixing member fixed to piping. (A) The top view of the valve | bulb opening / closing apparatus which concerns on 3rd Embodiment, (B) The longitudinal cross-sectional view. The side view of the valve opening / closing apparatus which concerns on 4th Embodiment. (A) The top view of the valve | bulb opening / closing apparatus which concerns on 5th Embodiment, (B) The side view. The perspective view of the valve | bulb opening / closing apparatus which concerns on 6th Embodiment. (A) The top view of the valve opening and closing apparatus which concerns on 6th Embodiment, (B) The side view. The front view of the fixing member in 6th Embodiment. (A)-(D) Explanatory drawing which shows the attachment procedure to the valve | bulb of the fixing member in 6th Embodiment. (A)-(C) Operation | movement explanatory drawing of the valve opening / closing apparatus which concerns on 6th Embodiment. (A) The attachment figure of the stopper (limiter) applied to 6th Embodiment, (B) The attachment figure of the detection sensor (limiter) applied to 6th Embodiment. (A) Connection diagram between detection sensor (limiter) and motor controller, (B) Wiring diagram. (A) (B) The attachment figure of the detection sensor (limiter) applied to 1st Embodiment. The perspective view of the valve | bulb opening / closing apparatus which concerns on 7th Embodiment. (A) The side view of the valve opening and closing apparatus which concerns on 8th Embodiment, (B) The enlarged view of the handle engaging part. (A)-(D) Explanatory drawing which shows the attachment procedure to the valve | bulb of the valve | bulb opening / closing apparatus which concerns on 8th Embodiment. (A) The side view which shows the other Example of the fixing member applied to the valve | bulb opening / closing apparatus which concerns on 1st Embodiment, (B) The top view. (A) The perspective view of the rod of the fixing member which concerns on another Example, (B) The perspective view of the locking member. (A) Top view which shows the other Example of the handle engaging part applied to the valve | bulb opening / closing apparatus which concerns on 1st Embodiment, (B) The side view.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1B and 1C, the valve 10 applied to the valve opening and closing apparatus according to the first embodiment includes a valve box 15 communicating with a pipe (not shown) and an upper opening of the valve box 15. A valve lid 14 that is closed and through which the valve shaft 13 passes, a yoke portion 12 that is screwed into a side surface of the valve shaft 13 to support the valve shaft 13, a valve body 16 that is provided at one end of the valve shaft 13, and a valve shaft 13 and a handle 20 provided at the other end.

As shown in FIG. 1A, the handle 20 includes a hub portion 23 connected to the valve shaft 13 and spokes 22 connecting the hub portion 23 and the outer ring 21.
The valve 10 thus configured moves the valve body 16 up and down by rotating the handle 20 to open and close the pipe.

  As shown in FIGS. 2A and 3, the valve opening / closing device 30 according to the first embodiment includes a base portion 40 whose relative movement with the handle 20 in the rotation direction of the handle 20 is restricted, A torque generator 50 that is supported by the base portion 40 and generates a torque that decelerates the rotation of the motor 51a (51), and a handle engagement that engages the handle 20 and rotates the handle 20 in the rotational direction by the torque. Unit 60.

The torque generation unit 50 is supported by the base unit 40 and generates torque on the output shaft 53 in which the rotation of the motor 51 is decelerated by the worm gear 52.
As shown in FIG. 3A, the worm gear 52 has a mechanism in which a screw gear 52a and a helical gear 52b matching the screw gear 52a are combined. By using the worm gear 52 as a speed reducer, a large reduction ratio can be obtained in one stage.

The handle engaging portion 60 holds the turntable 61 connected to the output shaft 53 of the torque generating portion 50, the engagement pin 62 engaged with the spoke 22 of the handle 20, and the outer ring 21 of the handle 20 in the axial direction. And a holding member 63a (63) for preventing the detachment.
As a result, the handle engaging portion 60 rotates the handle 20 in the rotational direction by the torque generated by the torque generating portion 50.
Here, the holding member 63a is composed of two members that are firmly connected by a hinge, and an open state and a closed state are operated manually by an operator.

The extending member 41 a (41) cooperates with the fixing member 70 a fixed to the yoke portion 12 of the valve 10, and restricts the base portion 40 from moving in the rotation direction of the handle 20. In other words, when the base portion 40 tries to rotate, the extending member 41a and the fixing member 70a are arranged to interfere with each other.
The fixing position of the fixing member 70a is not particularly limited, and may be any of a valve body (valve cover 14, valve box 15 and the like), piping, and surrounding structures (for example, handrails).

  As shown in FIG. 2B, the fixing member 70a includes a notch portion 71 into which the extending member 41a of the base portion 40 is engaged, and a restraining portion 72 that restrains a part of the valve 10 (for example, the yoke portion 12). Have.

The operation of the fixing member 70a fixed to the yoke portion 12 will be described with reference to FIGS.
The plate 73 is provided with a pair of rails 75 (75a, 75b) in parallel, and thus a pair of restraining portions 72 (72a, 72b) whose movement is restricted in one direction.

These restraining portions 72 (72a, 72b) are connected by a ratchet mechanism 76 at the opposing portions, and their movement is limited only in the direction in which they are close to each other.
The worker holds the plate 73 with one hand, attaches the fixing member 70a to a part of the valve 10 (for example, the yoke portion 12) from the side, and places the restraint portions 72 (72a, 72b) close to each other with the opposite hand. Move in the direction you want.
Thereby, the fixing member 70a can be easily fixed to a part of the valve 10.

FIG. 4C is a fixing member 70b (70) showing another embodiment.
In the fixing member 70b, the restricting portion 72c is configured as a lever having one end fixed to the rotation shaft. And in the state which this restraint part 72c closed as shown by the continuous line of FIG.4 (C), the other end is fastened to another part by a fastening member (not shown). Thereby, the fixing member 70b is stably fixed to a part of the valve 10.

(Second Embodiment)
As shown in FIG. 5A, in the valve 10 to which the valve opening / closing device according to the second embodiment is applied, the valve shaft 13 is arranged in parallel to the pipe 17.

  As shown in FIG. 5B, the valve opening / closing device 30 according to the second embodiment includes a base portion 40 in which relative movement with the handle 20 in the rotation direction of the handle 20 is restricted, and the base portion 40. A torque generator 50 that generates a torque that is supported by the motor 51a and decelerates the rotation of the motor 51a, and a handle engaging portion 60 that engages the handle 20 and rotates the handle 20 in the rotational direction by the torque. .

The torque generating unit 50 is supported by the base unit 40 and generates torque on the output shaft 53 that is obtained by reducing the rotation of the motor 51 by the coaxial reducer 52c.
As the coaxial speed reducer 52c, a planetary gear mechanism is illustrated in FIG. 5B, but a known one can be appropriately employed without being limited thereto. By using such a coaxial speed reducer 52c, the space around the axis can be saved.

The handle engaging portion 60 holds the turntable 61 connected to the output shaft 53 of the torque generating portion 50, the engagement pin 62 engaged with the spoke 22 of the handle 20, and the outer ring 21 of the handle 20 in the axial direction. And a holding member 63b (63) for preventing the detachment of.
As a result, the handle engaging portion 60 rotates the handle 20 in the rotational direction by the torque generated by the torque generating portion 50.

  Here, as shown in FIG. 6, the holding member 63 b includes a hook portion 64 that spans the outer ring 21 of the handle 20, an adjustment portion 65 that adjusts the length of the holding member 63 b, and an output that pivotally supports the adjustment portion 65. A lock member 67 that tensions or relaxes the holding state of the outer ring 21 and the hook portion 64 by switching the contact state between the shaft support portion 66 that floats in the longitudinal direction of the shaft 53 and the shaft support portion 66 having a cam shape. And have.

As shown in FIG. 6, the valve opening / closing device 30 according to the second embodiment is configured such that an insertion portion 68 is provided in the handle engaging portion 60 and is detachable from the torque generating portion 50.
Moreover, in the torque generation part 50, the input shaft 54 of the coaxial speed reducer 52c can be provided, and the motor 51b (51) can be detachably connected to the coaxial speed reducer 52c.
As such a motor 51b, tools, such as an electric drill driver and an air drill driver, are employable, for example.

In this way, the valve opening / closing device 30 in which each element part is configured to be detachable is assembled as follows.
First, the engaging pin 62 of the handle engaging portion 60 is inserted into the gap between the spokes 22 of the handle 20. The hook portion 64 of the holding member 63b is hung on the outer ring 21 of the handle 20, and the length is adjusted by the adjusting portion 65. Then, the lock member 67 is switched to place the holding member 63b in a tension state, and the handle engagement portion 60 is fixed to the handle 20 so as not to move.

  Next, the output shaft 53 of the torque generating part 50 is inserted into the insertion part 68 of the handle engaging part 60, and the base part 40 and the pipe 17 are connected by the extending member 41b. Note that the extending member 41b is configured to be extendable and contractable so as to correspond to an arbitrary distance to the pipe 17. Further, the fixing member 70c (70) can be constituted by, for example, a spring having a spring shape that is wound around the pipe 17 and fixed.

Then, when the motor 51b is connected to the input shaft 54 of the torque generating unit 50 and operated by manual operation of the worker, the extending member 41b is linked to the fixing member 70c fixed to the pipe 17 so that the base portion 40 is operated. Prevent it from moving around.
Then, torque is transmitted from the output shaft 53 of the torque generating unit 50 to the handle engaging unit 60, and the handle 20 is rotated to open and close the valve.

7A, the motor 51b can be connected to the speed reducer 52 via the flexible shaft 55.
Thereby, even when there is no space around the valve 10 (FIG. 5A), the valve opening / closing device 30 can be easily installed. Moreover, workability is improved even when the valve 10 is high and the scaffolding is poor, or the environment is poor and access is difficult. Further, the optionality of the installation location of the motor 51b is improved, and the motor 51b can be fixed to an appropriate structure. For this reason, it is not necessary for the worker to always hold the motor 51b, and the worker can retreat from the site during the valve opening / closing operation. In addition, battery replacement of the rechargeable motor 51b is facilitated.

FIG. 7B shows another embodiment of the fixing member 70.
The fixing member 70 d (70) fixed to the pipe 17 includes a pair of rods 43 that are pivotally supported by the pedestal 42, and a spring material 45 that applies elastic force in a direction in which the pair of rods 43 holds the pipe 17. The lock member 44 is configured to lock the rod 43 that holds the pipe 17 so as not to open.
As described above, the fixing member 70d is configured so that it can be easily attached to the pipe 17, and the base portion 40 is reliably prevented from being swung.

(Third embodiment)
As shown in FIG. 8, the valve opening / closing device according to the third embodiment is supported by the base portion 40 in which relative movement with the handle 20 in the rotation direction of the handle 20 is restricted, and supported by the base portion 40. A torque generation unit 50 that generates torque obtained by decelerating the rotation of the motor 51, and a handle engagement unit 60 that engages the handle 20 and rotates the handle 20 in the rotation direction by the torque.

The torque generating unit 50 is supported by the base unit 40 and applies to the handle engaging unit 60 a torque obtained by reducing the rotation of the motor 51 by the speed reducer 52 using a rack and pinion mechanism. Moreover, the speed reducer 52 by the rack and pinion mechanism is comprised from the pinion 52e directly connected to the motor 51, and the rack 52d provided in the outer periphery of the turntable 61c.
And the locking piece 46 provided in the base part 40 is engaging with the cyclic | annular modeling part 56 provided along the outer periphery of the turntable 61c. For this reason, when the motor 51 is driven, the base portion 40 rotates relatively while supporting the outer periphery of the turntable 61c.

The handle engaging portion 60 includes a turntable 61c, an engaging member 62c that engages with the spoke 22 of the handle 20, and a holding member 63c (63 that holds the outer ring 21 of the handle 20 and prevents it from being detached in the axial direction. ).
As a result, the handle engaging portion 60 rotates the handle 20 in the rotational direction by the torque generated by the torque generating portion 50.

Here, the holding member 63 c is provided on the U-shaped inner side surface of the engagement member 62 c and elastically contacts the outer ring 21 when being attached to or detached from the handle 20.
The extending member 41c (41) is linked to a fixing member (not shown) fixed to a surrounding structure (not shown), and restricts the base portion 40 from moving in the rotation direction of the handle 20. .

(Fourth embodiment)
As shown in FIG. 9, the valve opening / closing device according to the fourth embodiment is supported by the base portion 40 in which relative movement with the handle 20 in the rotation direction of the handle 20 is restricted, and supported by the base portion 40. A torque generating unit 50 that generates torque obtained by decelerating the rotation of a motor (not shown), and a handle engaging unit 60 that engages with the handle 20 and rotates the handle 20 in the rotation direction by the torque.

  The torque generating unit 50 is supported by the base unit 40 and applies to the handle engaging unit 60 a torque obtained by decelerating the rotation of a motor (not shown) by a speed reducer 52 using a timing belt mechanism. The configuration of the handle engaging portion 60 has much in common with that described in FIG.

The base portion 40 includes a rotating pulley 52f that causes the timing belt 48 to travel by the rotational force of a motor (not shown), and a driven pulley 47 that causes the belt surface of the traveling timing belt 48 to contact the outer peripheral surface of the handle engaging portion 60. , Is composed of.
As a result, the handle engaging portion 60 rotates the handle 20 in the rotational direction by the torque generated by the torque generating portion 50.
According to the configuration of the present embodiment, even when the installation position of the base portion 40 is eccentric with respect to the handle 20 and the position of the base portion 40 is displaced during rotation, the displacement is absorbed by the flexibility of the timing belt 48. Torque can be transmitted.

(Fifth embodiment)
As shown in FIG. 10, the valve opening / closing device 30 according to the fifth embodiment is supported by a base portion 40 in which relative movement with the handle 20 in the rotation direction of the handle 20 is restricted, and the base portion 40. In addition, a torque generating unit 50 that generates torque obtained by decelerating the rotation of a motor (not shown) and a handle engaging unit 60 that engages with the handle 20 and rotates the handle 20 in the rotation direction by the torque are provided. In the following description, components already described are denoted by common reference numerals in the drawings, and redundant description is omitted.

The extending member 41 d extends in a U shape from both side ends of the base portion 40 in a direction substantially orthogonal to the pipe 17. The extending member 41e has a similar U-shape, and is pivotally supported with respect to the extending member 41d as shown in FIG.
With the handle engaging part 60 engaged with the handle 20, the extending member 41d and the extending member 41e are rotated. Then, the portion of the pipe 17 before and after the valve 10 is pinched at the tip portion of each extending member 41. In this state, the base member 40 is stably fixed by fixing the rotation of the extending member 41d and the extending member 41e by the lock member 49.

  In the embodiment described above, the control circuit (not shown) of the motor 51 is provided with a sensor for detecting the rotation speed and torque, and the motor can be automatically stopped by detecting the open / closed state of the valve. Furthermore, if the control circuit is configured to be remotely operable by wire or wirelessly, it can be opened and closed without the operator approaching after the valve opening and closing device is installed.

(Sixth embodiment)
As shown in FIGS. 11 and 12A and 12B, the valve opening / closing device 30 according to the sixth embodiment includes a base portion 40 in which relative movement with respect to the handle 20 in the rotation direction of the handle 20 is restricted. A torque generating portion 50 that is supported by the base portion 40 and generates a torque that decelerates the rotation of the motor 51; and a handle engaging portion that engages the handle 20 and rotates the handle 20 in the rotation direction by the torque. 60.

  The valve 10 applied to the valve opening / closing device 30 according to the sixth embodiment opens and closes the pipe 17 by rotating the handle 20 (valve shaft 13) by 90 degrees. Examples thereof include a ball valve and a butterfly valve.

  The speed reducer provided in the torque generating unit 50 is rotatably supported by the base unit 40 and transmits the torque of the motor 51 to the first rotating body 57 provided with the handle engaging portion 60. A second rotating body 58.

As shown in FIG. 13, the fixing member 70 is fixed to the valve 10 (or the pipe 17) and supports the base portion 40 in a detachable manner.
The fixing member 70 has an engagement hole 77d into which the extending member 41f (41) of the base portion 40 is engaged and a frame 77a circumscribing the valve 10 (or the pipe 17), and a portion of the frame 77a. The base end is pivotally supported, and the distal end is locked to the other part of the frame body 77a so that the frame body 77a is coupled to the valve 10 (or the pipe 17), and the fastener 77b A screw portion 77c formed at the tip.

Based on FIG. 14, the attachment procedure to the valve | bulb 10 of the fixing member 70 in 6th Embodiment is demonstrated.
As shown in FIGS. 14A and 14B, the frame body 77a is formed in a U shape by fastening an L shape and an I shape with screws. As shown in FIGS. 14B and 14C, by adjusting the distance between the L-shaped one and the I-shaped one, it is possible to deal with valves 10 having various outer diameters. Then, as shown in FIG. 14D, the fixing member 70 is firmly fixed to the valve 10 by engaging the end of the fastener 77b with the frame body 77a and tightening the screw portion 77c.

The operation of the valve opening / closing device according to the sixth embodiment will be described with reference to FIG.
As shown in FIG. 15A, it is assumed that the handle 20 is set along the longitudinal direction of the pipe 17 and the valve 10 is in an open state.

  As shown in FIG. 15B, when the valve 10 is switched from the open state to the closed state, the second rotating body 58 is rotated to rotate the circumscribed first rotating body 57 at a reduced speed. Thereby, the handle engaging portion 60 can contact the handle 20 and rotate the valve shaft 13 with a small torque of the motor 51.

  Then, as shown in FIG. 15C, when the handle 20 rotates 90 degrees with respect to the pipe 17, the rotation of the second rotating body 58 is stopped, and the switching of the valve 10 from the open state to the closed state is completed. To do.

  As shown in FIG. 16, limiters 81 and 82 that limit the movable range of the handle 20 are provided in the base portion 40, thereby preventing an overload from being applied to the handle 20 and the valve shaft 13 when switching between opening and closing.

The limiter 81 shown in FIG. 16A is configured by a stopper member that comes into contact with the handle engaging portion 60.
A limiter 82 shown in FIG. 16B is a detection sensor 82 (82a, 82b) that detects the handle engaging portion 60 at the movable limit position of the movable range of the handle 20 and stops the rotation of the motor 51.

FIG. 17A shows a connection diagram between the detection sensor 82 (limiter) and the controller 83 of the motor 51, and FIG. 17B shows a wiring diagram thereof.
As shown in FIG. 17B, the controller 83 drives the motor 51 according to the motor power source 84 for driving the motor 51, the switching of the rotation direction of the motor 51, and the state of the detection sensors 82 (82a, 82b). And a setting circuit 85 for setting the stop.
Furthermore, an indicator 86 is provided for displaying whether the handle 20 is in an open position, a closed position, or is movable according to the movement of the motor 51 with a lamp 87.

  Further, as shown in FIGS. 13 and 15, the teeth engaged by the first rotating body 57 and the second rotating body 58 are limited to a range corresponding to the movable limit of the handle 20 on the outer periphery of the first rotating body. Is provided. With such a configuration, even if the second rotating body 58 rotates so as to exceed the limit by the limiters 81 and 82, the engagement between the first rotating body 57 and the second rotating body 58 is disengaged and idles. 20 and the valve shaft 13 can be prevented from being overloaded. In addition, the range in which the tooth | gear of the 1st rotary body 57 is provided should just be limited, and the range in which the tooth | gear of the 2nd rotary body 58 is provided is not specifically limited.

(Other examples of limiters)
Based on FIG. 18, detection sensors 82a and 82b (limiters) installed in the valve opening / closing device 30 applied to the valve 10 of the rotary handle will be described.
FIG. 18A shows the valve body 16 in a closed state, and FIG. 18B shows the valve body 16 in an open state. Note that the details of the valve 10 of the rotary handle are described in FIG.

  Thus, in the valve 10 of the rotary handle, the base portion 40 and the extending member 41 thereof are moved up and down as the handle 20 rotates. The detection sensors 82a and 82b (limiters) are installed at the movable limit position of the movable range so as to detect the fixed member 70.

(Seventh embodiment)
As shown in FIG. 19, the valve opening / closing device 30 according to the seventh embodiment is configured such that the torque of the motor 51 and the first rotating body 91 that is rotatably supported by the base portion 40 and is provided with the handle engaging portion 60. And a second rotating body 92 that transmits to the first rotating body 91.
The movable range of the handle engaging portion 60 is defined by a geneva mechanism in which the guide pin 93 of the second rotating body 92 is guided to the slot 94 of the first rotating body 91.
In FIG. 19, the same components as those in FIG. 11 are denoted by the same reference numerals, and detailed description thereof is omitted.

  When the second rotating body 92 rotates in the arrow direction from the opened state of the valve 10 shown in FIG. 19, the guide pin 93 slides in the slot 94 and rotates the first rotating body 91 in the arrow direction. As a result, the handle engaging portion 60 displaces the handle 20 by 90 degrees in the direction of the arrow to place the valve 10 in a closed state.

  Next, when the second rotating body 92 rotates in the direction opposite to the arrow from the closed state of the valve 10, the guide pin 93 slides after engaging with the slot 94, and the first rotating body 91 is moved in the direction opposite to the arrow. Rotate. Thereby, the handle engaging part 60 displaces the handle 20 by 90 degrees in the direction opposite to the arrow to open the valve 10.

(Eighth embodiment)
As shown in FIG. 20A, in the valve opening / closing device 30 according to the eighth embodiment, the valve handle 20 has a lever 24 that locks or releases its rotation.
As shown in FIG. 20B, the handle engaging portion 60 includes a support shaft portion 69a whose one end is fixed to the first rotating body 91, and a handle holding portion 20 fixed to the other end of the support shaft portion 69a. The operation part 69c of the lever 24 is constituted.

Based on FIG. 21, the attachment procedure to the valve of the valve opening and closing apparatus according to the eighth embodiment will be described.
FIG. 21A is a side view of the pipe 17 in which the valve 10 having the ratchet type handle 20 that can be locked / released by the operation of the lever 24 is installed. As shown in FIG. 21B, the valve opening / closing device 30 is set after the fixing member 70 is attached to the valve 10.

  As shown in FIGS. 21C and 21D, when the operating portion 69c of the handle engaging portion 60 is operated to lift the lever 24, the rotation of the locked handle 20 is released. When the motor 51 is driven while maintaining this released state of rotation, the handle 20 rotates and the valve 10 changes from the open state shown in the figure to the closed state.

(Other application examples of fixing members)
22A and 22B show another embodiment of the fixing member 70 applied to the valve opening / closing device 10 of the rotary handle. The fixing member 70 includes a pair of rods 43 that circumscribe the body of the valve opening / closing device 10, a connecting portion 43 b that elastically connects the ends of the pair of rods 43, and a hole 43 a ( 23 (A)) and a lock member 44 that fixes the rod 43 that is opposed so as not to open. Furthermore, a spring material 45 for assisting the elastic force of the connecting portion 43b is also provided as necessary.

  As shown in FIG. 23B, the lock member 44 includes a shaft portion 44a that penetrates the hole portion 43a, and locking pieces 44b and 44c that are formed at both ends of the shaft portion 44a and engage with the hole portion 43a. Consists of

(Other application examples of the handle engaging part)
24A and 24B show another embodiment of the handle engaging portion applied to the valve opening / closing device 10 of the rotary handle. In FIG. 24, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
In this embodiment, the handle engaging portion 60 is provided with a locking member 62d at the tip thereof so that the engaging pin 62 is not detached from the rotating handle 20.

  According to the valve opening / closing device of at least one embodiment described above, since it is not necessary to remove the existing handle, it can be mounted in a short time and the valve can be opened and closed automatically. For this reason, the restraint time of the worker at the work site is shortened, and the exposure time in the radioactive environment can be shortened.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, changes, and combinations can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Valve, 12 ... Yoke part, 13 ... Valve shaft, 14 ... Valve cover, 15 ... Valve box, 16 ... Valve body, 17 ... Piping, 20 ... Handle, 21 ... Outer ring, 22 ... Spoke, 23 ... Hub part, 24 ... Lever, 30 ... Valve opening / closing device, 40 ... Base portion, 41 (41a, 41b, 41c, 41d, 41e, 41f) ... Extension member, 42 ... Pedestal, 43 ... Rod, 43a ... Hole portion, 43b ... Connection , 44 ... Lock member, 44 a ... Shaft part, 44 b ... Lock piece, 44 c ... Lock piece, 45 ... Spring material, 46 ... Lock piece, 47 ... Driven pulley, 48 ... Timing belt, 49 ... Lock member, DESCRIPTION OF SYMBOLS 50 ... Torque generation part, 51 (51a, 51b) ... Motor, 52 ... Reduction gear (worm gear), 52a ... Screw gear, 52b ... Helical gear, 52c ... Coaxial reduction gear, 52d ... Rack, 52e ... Pinion, 52f ... rotation 53 ... output shaft 54 ... input shaft 55 ... flexible shaft 56 ... annular shaped portion 57 ... first rotating body 58 ... second rotating body 60 ... handle engaging portion 61 (61c) ... turn Table, 62 ... engaging pin, 62c ... engaging member, 62d ... locking member, 63 (63a, 63b, 63c) ... holding member, 64 ... hook part, 65 ... adjustment part, 66 ... shaft support part, 67 ... lock Member, 68 ... Insertion part, 69a ... Spindle part, 69b ... Holding part, 69c ... Operation part, 70 (70a, 70b, 70c, 70d) ... Fixing member, 71 ... Notch part, 72 ... Restraint part, 73 ... Plate 75 ... Rail, 76 ... Ratchet mechanism, 77a ... Frame, 77b ... Fastener, 77c ... Screw part, 77d ... Engagement hole, 81 ... Stopper (limiter), 82 (82a, 82b) ... Detection sensor (limiter) , 83 ... Roller, 84 ... motor power, 85 ... setting circuit, 86 ... indicator, 87 ... lamp, 91 ... first rotary member, 92 ... second rotary member, 93 ... guide pin, 94 ... slot.

Claims (13)

A base portion in which movement of the valve handle in the rotational direction is restricted;
A torque generating unit that generates torque that is supported by the base unit and decelerates rotation of the motor;
A valve opening / closing device comprising: a handle engaging portion that engages with the valve handle and rotates the valve handle in the rotation direction by the torque. The valve opening and closing device according to claim 1,
The valve opening / closing apparatus according to claim 1, wherein the speed reducer provided in the torque generating unit is any one of a worm gear, a rack and pinion, a timing belt, and a coaxial speed reducer. In the valve opening and closing device according to claim 1 or 2,
The valve opening and closing device, wherein the handle engaging portion includes a holding member that holds the valve handle and prevents detachment in the axial direction. The valve opening / closing apparatus according to any one of claims 1 to 3,
The valve opening and closing device characterized in that the base portion is restricted from moving in the rotational direction in association with a fixing member fixed to the valve body or piping. The valve opening / closing apparatus according to any one of claims 1 to 4,
The valve opening and closing apparatus, wherein the motor is detachably connected to a speed reducer. The valve opening / closing apparatus according to any one of claims 1 to 5,
The motor is connected to a speed reducer via a flexible shaft. The valve opening and closing device according to claim 1,
The base portion is detachably supported by a fixing member fixed to the valve body or the pipe,
The speed reducer provided in the torque generator is
A first rotating body rotatably supported by the base portion and provided with the handle engaging portion;
A valve opening and closing device comprising: a second rotating body that transmits torque of the motor to the first rotating body. The valve opening and closing device according to claim 7, wherein the fixing member is
A frame that has an engagement hole into which the extending member of the base portion is engaged and circumscribes the valve body or the pipe;
And a fastener for coupling the frame body to the valve body or piping by having a base end pivotally supported by the frame body portion and a distal end locked to another portion of the frame body. Characteristic valve opening and closing device. The valve opening / closing apparatus according to any one of claims 1 to 8,
A valve opening and closing device comprising a limiter for limiting a movable range of the handle. The valve opening and closing device according to claim 9,
The valve opening / closing apparatus, wherein the limiter is a detection sensor that detects a movable limit position of the movable range and stops the rotation of the motor. The valve opening / closing device according to any one of claims 7 to 10,
The valve opening and closing device characterized in that a movable range of the handle engaging portion is defined by a mechanism in which a guide pin of a second rotating body is guided in a slot of the first rotating body. The valve opening / closing apparatus according to any one of claims 7 to 11,
The valve handle has a lever that locks or releases its rotation,
A valve opening and closing device, wherein the handle engaging portion has an operation portion of the lever. Installing the base portion so that the movement of the valve handle in the rotational direction is restricted;
Generating torque obtained by decelerating the rotation of the motor from a torque generator supported by the base part;
And a step of rotating a handle engaging portion engaged with the valve handle by the torque in the rotation direction.

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