JP3140136B2 - Handle for valve operation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly used for a manually operated valve used in a fluid line of a nuclear power plant or the like, and is used for valve operation so as to prevent erroneous operation of the valve. Improvement of steering wheel.

[0002]

2. Description of the Related Art In general, in a fluid line of a nuclear power plant or the like, when a manual valve having various structures, for example, a handle is rotated forward and reverse, a stem rotates up and down while rotating.
When the needle valve and the handle are also rotated forward and reverse, the disc provided at the lower part of the stem comes into contact with the valve seat, and the stem moves up and down while rotating, and the diaphragm located below the stem is moved to the valve seat. There are many diaphragm-type valves that can be separated. These valves are all designed so that the operator can manually control the flow rate, pressure, and the like in the pipeline by manually rotating the handle of the valve.

[0003]

When a large number of manual valves are installed in a fluid line, an operator must operate the valve erroneously, for example, keep the valve open at all times. However, the valve may be accidentally closed, or the operation may be reversed, which may lead to a major accident. In particular, when a person other than the person in charge operates the valve, the above-mentioned problem becomes more prominent.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a valve operating handle capable of preventing erroneous operation of a valve.

[0005]

In order to achieve the above object, a valve operating handle according to the present invention is provided with a display indicating a valve opening direction and a valve closing direction and a display indicating a normal operation state of the valve. A disk-shaped handle body (14) having a housing space (14a) below the upper panel (16) and detachably attached to the stem (2) of the manual valve, and a housing space (14) for the handle body (14). 14a), and when the handle body (14) is rotated, the rotation direction of the stem (2) is set to one of the valve opening direction, the valve closing direction, and both the valve opening and closing directions. A rotation switching mechanism (17) for selectively switching, and a state in which the stem (2) is rotatable in a valve opening direction, a valve closing direction, or both a valve opening and valve closing direction in conjunction with the rotation switching mechanism (17); In the upper panel (16) An opening / closing display mechanism (18) for displaying through a digit display window (16a); and a ratchet wheel (22) having the rotation switching mechanism (17) fixed to the upper end of the stem (2); The two pawls (14) are swingably disposed in the receiving space (14a) in opposition to each other, and the leading ends of the pawls (22) are engaged with or disengaged from the ratchet (22). 23a) ・ (23b)
And springs (2) for urging the pawl bodies (23a) and (23b) in directions in which their respective tips engage the ratchet wheel (22).
4) A wrench hole (25b) which is rotatably erected between the (24) and both claw bodies (23a) and (23b), and a wrench for rotating the head is engaged with the head. The operation shaft (25) is provided between the claw body (23a) and the claw body (23b) disposed opposite to each other and provided on the operation shaft (25), and the rotation of the operation shaft (25) is provided. With both claws (23a),
By swinging (23b), one end is engaged with or disengaged from the ratchet wheel (22), and the other tip is disengaged from the ratchet wheel (22) or the ratchet wheel (2).
2) or both ends are engaged with the ratchet wheel (2).
And a cam plate (25a) detachable from the handle body (14), and the open / close display mechanism (18) is provided on a display window (16a) provided on an upper panel (16) of the handle body (14). A lower panel (15) spaced below the panel (16); and a lower panel (15).
And a male screw (20) for supporting and fixing, which is erected on the lower surface of the lower panel (15), and a base end of which is supported and fixed to an upper end of the operating shaft (25). ) And the external thread (2)
0) through which the display panel (30) is rotatably supported in a horizontal position above the lower panel (15), and has a display character on the outer surface of the front end portion of the display panel (16a).
And the base end of the display plate (30) and the switching lever (2).
8) is connected movably in the left-right direction with the distal end of the display plate (30) from the pin (29) and the guide hole (30a) for transmitting the movement of the distal end of the switching lever (28) to the proximal end of the display plate (30). The basic structure of the present invention is that of the present invention.

[0006]

When the valve is to be opened or closed, the rotation switching mechanism provided on the handle body is operated so that the stem can be rotated only in one of the valve opening direction and the valve closing direction. . Then, the operator rotates the handle main body in a predetermined direction to open or close the valve. At this time, the stem is rotated only in one direction (the valve opening direction or the valve closing direction) by the rotation switching mechanism.
If this valve operating handle is used, even if an operator operates the valve by mistake after the opening and closing operation of the valve, the stem will rotate only in one direction, so that the valve is always in a constant state (open or closed). (Valve state), so that easy erroneous operation can be prevented. As a result, occurrence of an accident can be prevented. On the other hand, when it is desired to change the state by operating the valve during maintenance and inspection of the plant or during operation, by operating the rotation switching mechanism, the stem can be rotated in a predetermined direction, and the handle body is rotated to operate. The valve can be changed to a predetermined state. In the valve operating handle, the rotation switching mechanism is accommodated in the accommodation space of the handle main body, so that the operation of the handle can be performed smoothly and easily without obstructing the operation of the handle. In addition, it is possible to completely prevent erroneous operation without the operator's hand touching the rotation switching mechanism when operating the steering wheel, and the rotation switching mechanism is not automatically switched.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a needle valve using a valve operating handle 1 according to an embodiment of the present invention.
When the handle 1 is rotated forward (in the direction of the arrow a in FIG. 2), the stem 2 rotates and descends.
When the disk 3 provided at the lower part of the handle rests on the valve seat 4 to close the fluid passage 5, and the handle 1 is rotated in the reverse direction (the direction of the arrow b in FIG. 2), the stem 2 rises while rotating. 2
The disc 3 provided at the lower part of the valve seat is separated from the valve seat 4 to open the fluid passage 5. In FIG. 1, 6 is a body, 7 is a bonnet, 8 is a hammer wheel, 9 is a gland packing, 10 is a packing presser, 11 is a bonnet nut, 12 is a panel nut, and 13 is a panel.

The valve operating handle 1 of the present invention is removably attached to the upper end of the stem 2, and includes a handle body 14 and a lower panel 1 attached to the handle body 14.
5 and an upper panel 16, a rotation switching mechanism 17 provided on the handle body 14, a valve opening / closing display mechanism 18 provided on the handle body 14, and the like.

That is, the handle main body 14 is formed in a disk shape from a metal material such as aluminum, and a concave housing space 14a for housing the rotation switching mechanism 17 is formed on the upper surface thereof. A fitting hole 14b is formed in the center of the bottom of the handle body 14 to be fitted with a ratchet wheel 22 of a rotation switching mechanism 17 described later. Further, on the upper part of the handle body 14, a lower step 14c for mounting the lower panel 15 and an upper step 1 for mounting the upper panel 16 thereon.
4d are respectively formed.

The lower panel 15 and the upper panel 16
Are formed in a disc shape from a metal material or a plastic material, and are respectively mounted on the upper step portion 14d and the lower step portion 14c of the handle main body 14 so as to cover the opening of the accommodation space 14a of the handle main body 14. It is fixed to the handle body 14 by the like. Arrows and letters indicating the valve opening direction and the valve closing direction are provided on the surface of the upper panel 16.
Alternatively, characters or the like indicating the normal state of the valve are displayed. 19 is a fixing screw for fixing the lower panel 15 to the handle body 14, 20 and 21 are male screws and nuts for fixing the upper panel 16 to the handle body 14, and the male screw 20 is attached to the lower panel 15. It is planted and inserted into the upper panel 16.

The rotation switching mechanism 17 is located in the accommodation space 14a of the handle main body 14 and is interposed between the handle main body 14 and the stem 2, and closes the stem 2 when the handle main body 14 rotates forward and reverse. Valve direction (arrow a direction in FIG. 5)
Alternatively, it is possible to rotate in only one direction of the valve opening direction (the direction of the arrow b in FIG. 5) and to switch the rotation direction of the stem 2, and the ratchet wheel 22, the first pawl body 23a and The second claw body 23b and the compression coil spring 2
4 and an operation shaft 25. In particular,
The ratchet wheel 22 is fitted into the fitting hole 14b of the handle main body 14 so as to be relatively rotatable. The center portion of the ratchet 22 is non-rotatably engaged with a connecting portion 2a having a rectangular cross section formed at the upper end of the stem 2. An engaging hole 22a to be combined is formed. The ratchet wheel 22 is engaged with the connecting portion 2a of the stem 2, and the stem 2
Is secured by a fixing nut 26 screwed to the upper end of the cover. Also, the first claw body 23a and the second claw body 23b
Is swingably supported on the bottom of the handle body 14 in an opposed state and, as shown in FIGS.
And a non-engagement position that separates from the ratchet wheel 22 to make the rotational direction of the ratchet wheel 22 free. Further, the compression coil spring 24 is interposed between the handle main body 14 and each of the claw members 23a and 23b.
a and 23b are urged to swing to the engagement position. On the other hand, the operating shaft 25 is rotatably supported by the handle body 14 and the panels 15 and 16 at a position between the claw bodies 23a and 23b, and swings the claw bodies 23a and 23b at its lower end. The cam plate 25a which is made to be freely disengageable from the ratchet wheel 22
Are integrally formed. The shape of the cam plate 25a is such that when the operation shaft 25 is rotated rightward (clockwise in FIG. 5) by a predetermined angle, only the first claw body 23a is disengaged against the elastic force of the compression coil spring 24. When the operating shaft 25 is rotated to the left (a counterclockwise direction in FIG. 5) by a predetermined angle, only the second claw 23b resists the elastic force of the compression coil spring 24. When the operation shaft 25 is rotated so that the cam plate 25a comes to the intermediate position (the position in FIG. 8) between the pawls 23a and 23b, the pawls 23a and 23b Are set to swing to the disengaged positions, respectively, against the elastic force of the compression coil spring 24.
Is exposed on the upper surface of the upper panel 16, and a wrench hole 25 b into which a hexagon wrench (not shown) is fitted is formed on the upper end surface of the operation shaft 25. This wrench hole 2
By inserting a hexagon wrench into 5b, the operation shaft 25 can be rotated in any direction. 3 and 5, reference numeral 27 denotes a stopper formed at the bottom of the handle main body 14 for restricting the rotation angle of the operation shaft 25.

The opening / closing display mechanism 18 includes a handle main body 1.
4, for displaying the open / closed state of the valve, so that the open / closed display can be manually switched. Specifically, as shown in FIGS. 3 and 6, the opening / closing display mechanism 18 is fixed to a display window 16 a formed in a peripheral portion of the upper panel 16 and an upper end of the operation shaft 25 in a horizontal posture.
A switching lever 28 having a parallel pin 29 implanted at one end thereof, and a guide hole 30a at one end which is swingably supported by the male screw 20 and through which the parallel pin 29 is inserted, is displayed on the surface of the other end. An opening / closing display plate 30 displaying characters (open and closed) corresponding to the window 16a. When the operating shaft 25 is rotated to the right or left by a predetermined angle using a hexagon wrench, the switching lever 28 swings. The opening / closing display panel 30 linked to the display unit 1 also swings rightward or leftward, and the character (open or closed) displayed on the opening / closing display panel 30 is displayed on the display window 1.
6a. The open / close display mechanism 18 moves the operation shaft 25 rightward (clockwise in FIG. 6).
When the display panel 30 is rotated by a certain angle, the open / close display panel 30 swings to the left (counterclockwise direction in FIG. 6), and the character that is open in the display window 16a rotates the operation shaft 25 to the left by a certain angle. The opening / closing display plate 30 swings rightward so that a closed character appears on the display window 16a.

When the valve operating handle 1 is mounted on the stem 2 of the valve, the engaging holes 22a of the ratchet wheel 22 are removed while the panels 15, 16 and the opening / closing display mechanism 18 are removed from the handle body 14. The engaging nut 26 engages with the connecting portion 2 a of the stem 2, and a fixing nut 26 is screwed to the upper end of the stem 2. Thereafter, the panels 15, 16 and the opening / closing display mechanism 18 are attached to the handle body 14. The valve operating handle 1 may be attached to a valve newly provided in the fluid line, or may be attached to an existing valve. When the valve of FIG. 1 provided with the valve operating handle 1 is to be always opened, the rotation switching mechanism 1
The operating shaft 25 is rotated by a hexagonal wrench so that the stem 2 rotates only in the valve opening direction. That is, the operation shaft 25 is rotated rightward by a certain angle to bring only the second claw 23b to the engagement position. Then, when the handle main body 14 rotates in the reverse direction (the direction of the arrow b in FIG. 2), the second claw body 23b pushes the ratchet wheel 22 to rotate the stem 2 in the direction of the arrow b in FIG. During rotation (in the direction of arrow a in FIG. 2), the handle body 14 idles and the stem 2
Is prevented from rotating. As a result, the operator can open the valve by rotating the handle body 14 in the reverse direction. Further, even if the operator attempts to close the valve by mistake after the valve opening operation is completed, the stem 2 rotates only in the valve opening direction, and the valve is always kept open. When the operation shaft 25 of the rotation switching mechanism 17 is rotated rightward, the display of the open / close display plate 30 appears on the display window 16a, and the open / closed state of the valve is also displayed. On the other hand, when the valve is normally closed, the operating shaft 25 of the rotation switching mechanism 17 is rotated by a hexagon wrench so that the stem 2 rotates only in the valve closing direction. That is, the operation shaft 25 is rotated to the left by a predetermined angle to bring only the first claw body 23a to the engagement position. Then, when the handle main body 14 rotates forward (in the direction of the arrow a in FIG. 2), the first claw body 23a pushes the ratchet wheel 22 to rotate the stem 2 in the direction of the arrow in FIG. At this time (in the direction of the arrow b in FIG. 2), the handle body 14 idles and the rotation of the stem 2 is prevented. As a result, the operator can close the valve by rotating the handle body 14 forward. Also, even if the operator attempts to open the valve by mistake after the valve closing operation is completed, the stem 2 rotates only in the valve closing direction, and the valve is always kept closed.
When the operation shaft 25 of the rotation switching mechanism 17 is rotated leftward, a display indicating that the open / close display plate 30 is closed appears on the display window 16a, and the open / closed state of the valve is also displayed. If the valve operating handle 1 is used, even if an operator operates the valve by mistake after the opening and closing operation of the valve, the stem 2 rotates only in one direction. (Or a valve closed state), so that easy erroneous operation can be prevented. As a result, occurrence of an accident can be prevented. on the other hand,
If it is desired to change the state of the valve by operating the valve during maintenance or operation of the plant, the stem 2 can be rotated in a predetermined direction by operating the rotation switching mechanism 17 and the handle body 14 is rotated. Thus, the valve can be changed to a predetermined state. In addition, handle 1 for valve operation
Since the rotation switching mechanism 17 is housed in the housing space 14a of the handle main body 14, the operation of the handle 1 can be performed smoothly and easily without obstructing the operation of the handle 1. When the handle 1 is operated, the operator's hand hits the rotation switching mechanism 17 to rotate the rotation switching mechanism 1.
The erroneous operation can be completely prevented without saying that 7 is switched on its own.

In the above embodiment, the valve operating handle 1 is attached to the needle valve. However, the present invention is not limited to the above embodiment, and the valve operating handle 1 is rotated in the valve opening and valve closing directions. If you have a free stem 2,
It may be attached to a valve having any structure. For example, the valve operating handle 1 may be attached to a diaphragm-type valve, a globe valve, a gate valve, or the like.

In the above embodiment, the handle body 14
One operation shaft 25 and the first and second
The claw body 23b is provided, but in other embodiments, two sets of the same claw body are provided in the accommodation space 14a and the two operation shafts 25 are rotated by rotating them. The switching mechanism 17 may be switched.

In the above embodiment, the operating shaft 25 is rotated with a hexagonal wrench. In other embodiments, the upper end of the operating shaft 25 is projected from the upper panel 16, and An image may be provided on the protruding portion, and the operation shaft 25 may be rotated by operating the image taking.

In the above embodiment, the operating shaft 25 can be rotated from the upper surface of the handle main body 14.
In another embodiment, the operating shaft 25 may be rotatable from the side surface (outer peripheral surface) of the handle 1.

In the above embodiment, the handle body 14
Is provided with a rotation switching mechanism 17 and a valve opening / closing display mechanism 18, but in another embodiment, only the rotation switching mechanism 17 may be provided, or the opening degree for displaying the opening degree of the valve may be provided. A display mechanism may be provided.

In the above embodiment, each panel 15, 1
6 is fixed to the handle main body 14 by screws or the like, but in another embodiment, the panels 15 and 16 may be fixed by an adhesive.

In the above embodiment, the open / close display mechanism 18
Is manually switched, but in another embodiment, it may be automatically switched when the handle body 14 is rotated. For example, open / close display mechanism 1
8 and JP-B-57-12312 and JP-B-61-49.
No. 546 may be used.

In the above embodiment, the handle body 14
Although the rotation switching mechanism 17 and the opening / closing display mechanism 18 are provided in the embodiment, in another embodiment, an alarm mechanism for prompting attention by voice when the handle 1 is touched is provided, or an alarm device for notifying an erroneous operation, for example. If the display mechanism is normally open but the rotation switching mechanism 17 is closed only, an alarm may be provided to alert the user with light or voice. Further, an oscillating device may be incorporated in the handle 1 to monitor an erroneous opening / closing operation.

[0022]

As described above, the valve operating handle according to the present invention allows the stem to be rotated only in one of the valve opening direction and the valve closing direction when the handle is rotated forward and backward, and the stem can be rotated. Can be freely switched, so that easy erroneous operation can be prevented. For example, even if another operator operates the valve by mistake after the opening and closing operation of the valve, the stem rotates only in one direction, and the valve is always kept in a constant state.
As a result, occurrence of an accident can be prevented.
In addition, since the operation handle accommodates the rotation switching mechanism and the like in the accommodation space of the handle main body, the operation of the handle can be performed smoothly and easily without disturbing the operation of the handle. Of course, it is possible to completely prevent erroneous operation without the operator's hand touching the rotation switching mechanism when operating the handle, and the rotation switching mechanism does not switch freely.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a needle valve using a valve operating handle according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view of a valve operating handle.

FIG. 3 is a vertical sectional view taken along line AA of FIG. 2;

FIG. 4 is a vertical sectional view taken along line BB of FIG. 2;

FIG. 5 is a cross-sectional view taken along line CC of FIG. 4;

FIG. 6 is a transverse sectional view taken along line DD of FIG. 4;

FIG. 7 is a cross-sectional view when the rotation switching mechanism 17 is operated to close the valve.

FIG. 8 is a cross-sectional view when the rotation switching mechanism 17 is operated to a neutral state.

[Explanation of symbols]

1 is a handle for operating a valve, 2 is a stem, 14 is a handle body, 14a is a housing space, and 17 is a rotation switching mechanism.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 31/60 F16K 35/00

Claims (1)

(57) [Claims] A display indicating a valve opening direction and a valve closing direction.
Panel with a display that shows the operating status of the
Has an accommodation space (14a) below the
Disc-shaped removably mounted on valve stem (2)
Handle body (14) and accommodation of handle body (14)
The handle body (14) is disposed in the space (14a).
The direction of rotation of the stem (2) during rotation operation
Direction, valve closing direction, or both valve opening and valve closing directions.
A rotation switching mechanism (17) for selectively switching;
The stem (2) opens in conjunction with the changeover mechanism (17)
Direction or closing direction or both opening and closing directions
The possible state is provided on the upper panel (16).
Opening / closing display mechanism (1) for displaying through the display window (16a)
8), and further comprising the rotation switching mechanism (17),
Claw wheel (22) fixed to the upper end of stem (2)
In the accommodation space (14a) of the dollar body (14)
The tip is engaged with the ratchet wheel (22).
Are two claw bodies detached from the claw wheel (22)
(23a) and (23b) and both claw bodies (23a) and (23)
b) in the direction in which their tips engage the ratchet wheel (22) respectively.
The biasing springs (24) and (24) and the both claw bodies (2
3a) and (23b) are rotatably erected between the head and the head.
A wrench hole into which a wrench for rotating this is engaged
(25b) and the operating shaft (25)
Located between the claw body (23a) and the claw body (23b)
The operation shaft (25) is provided on the operation shaft (25).
By swinging the claws (23a) and (23b)
One of the ends is engaged with the ratchet wheel (22) or the ratchet wheel
(22) and the other end of the ratchet (2)
2) disengage or engage the ratchet wheel (22) or
Made both ends detach from the ratchet wheel (22)
A cam plate (25a);
The mechanism (18) is connected to the upper panel of the handle body (14).
The display window (16a) provided in (16) and the upper panel (1)
6) Lower panel (15) spaced apart below
And a male screw for supporting and fixing standing on the lower panel (15)
(20) and horizontally arranged above the lower panel (15).
The base end is supported and fixed to the upper end of the operating shaft (25).
And the switching lever (2) rotated with the operation shaft (25).
8) Insert the male screw (20) into the lower panel
(15) is supported rotatably in a horizontal posture above the tip
The display characters to be displayed on the display window (16a) on the outer surface
Display plate (30) and base end of the display plate (30)
And the tip of the switching lever (28) are moved in the left-right direction.
And the movement of the tip of the switching lever (28) is displayed.
The pin (29) and the guide for transmitting to the proximal end of the display plate (30)
And a connecting mechanism comprising a through hole (30a).
Features a handle for manual valve operation.