JPH0442627Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a valve opening/closing device with a detachable handle, and more specifically, a valve opening/closing position and a low flow opening position can be selected by operating a detachable handle. The present invention relates to a switchgear that can be opened and closed.

[Prior Art] For example, a butterfly valve is used to open and close gas piping, and when construction is performed on the downstream side of the pipeline, the butterfly valve is closed.

Conventionally, as opening/closing devices for opening and closing butterfly valves, manual opening/closing devices such as a lock lever type or worm gear type, and automatic opening/closing devices using a cylinder or a motor have been proposed and put into practical use.

[The problem that the idea attempts to solve]

By the way, all of the conventional opening/closing devices have complicated mechanisms and have fixed handles and drive sources, resulting in large external dimensions and problems in that installation is inconvenient in terms of space.

Therefore, in order to solve the above problems, this idea was developed so that the valve can be opened and closed using a removable handle, the external size is small, which is advantageous in terms of installation space, and the valve can be locked in two positions: open and close. Our objective is to provide a valve opening/closing device with a removable handle.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention provides a cylindrical operating shaft that is connected to the end of the valve stem so as to rotate integrally, and a detachable part for the handle is provided, and a stopper shaft is mounted inside this operating shaft. The cylindrical operating shaft is assembled so that it can be moved freely in the direction of rotation, passes through the long holes in the axial direction provided on both sides of the cylindrical operating shaft, and both ends protrude from the outer peripheral surface of the cylindrical operating shaft, connecting the operating shaft and the stopper shaft in the rotational direction. At the same time, a stopper pin that limits the axial movement of the stopper shaft to the range of the elongated hole is fixed to the stopper shaft, and a spring is applied to the stopper shaft to bias the stopper pin upward elasticity so that it comes into contact with the upper end of the elongated hole, and the operating shaft is moved. A cam groove that restricts the end of the stopper pin within a 90° range is provided on the inner periphery of the cover, which is fixedly arranged to hold the stopper pin freely. A closed position holding recess provided so as to be non-rotatably engaged in the raised position, a small flow open position holding recess provided adjacent to this recess, and an open position holding recess provided at the other end of the rotation range of the stopper pin. This configuration adopts a structure formed by a recessed portion.

[Effect]

When the stopper pin is pushed down and removed from the closed position holding recess in the cam groove, and the operating shaft is rotated using the handle attached to the detachable part, the stopper pin faces the small flow open position holding recess and the stopper pin is pushed in. When released, the pin engages with this recess and the valve is maintained in a low flow open state.

If the stopper shaft is further pushed down from this state, the stopper pin will be released from the small flow open position holding recess, and when the operating shaft is rotated, the pin will face the open position holding recess and the depression will be released, the pin will remain in the open position. It engages with the recess and locks the valve in its fully open state.

The return to the closed position can be performed in the reverse order of the opening operation described above, and in the low flow open state, the closed state can be quickly achieved by simply rotating the operating shaft in the closing direction, and even in the closed state, it will not be locked. That will happen.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

FIG. 1 shows a butterfly valve 1 as a preferred example of a valve, in which a valve body 2 accommodates a valve body 2 and is rotatably supported by vertical valve stems 4 and 5. The opening and closing states of the passage 6 can be obtained by rotating the passage 6 by .

As shown in FIGS. 1 to 4, the opening/closing device for opening and closing the butterfly valve 1 includes a cylindrical operating shaft 1 connected to the upper end of the valve stem 4 so as to rotate integrally therewith.
1, a cover 13 fixed to the upper end of the valve body 2 with bolts 12 while holding the operating shaft 11 rotatably, a stopper shaft 14 incorporated into the operating shaft 11, and a stopper shaft 14 and an operating shaft. A stopper pin 15 passing through the shaft 11 and a stopper shaft 1
A spring 16 is compressed between the stopper shaft 14 and the valve stem 4 so as to constantly push the valve to the raised position, and a cam groove 1 is formed on both sides of the inner circumference of the cover 13.
7 and 17.

The operating shaft 11 has a lower end that is squarely fitted to the upper end of the valve stem 4, and is integrally coupled with the valve stem 4 in the rotational direction. A rectangular shaft portion 1 at the upper end protrudes upward from the upper surface of the cover 13.
Reference numeral 9 designates an attachment/detachment portion to which a rotating handle (not shown) is detachably attached.

The stopper shaft 14 is fitted into the operating shaft 11 so as to be movable in the vertical axial direction, and has a stopper pin 1 attached to the lower end thereof so as to penetrate in the radial direction.
5 passes through elongated holes 18, 18 on both sides, and limits the vertical movement of the stopper shaft 14 to the range of the elongated holes 18, 18, and the engagement of the pin 15 with the elongated holes 18, 18 allows the operating shaft to be 11 and a stopper shaft 14 are coupled in the rotational direction.

The spring 16 has a stopper pin 15 that is connected to the elongated hole 1.
8, 18 so that the stopper shaft 14 is positioned at the upper end of 8, 18.
The stopper shaft 14 is formed in such a length that its upper portion protrudes from the upper end of the operating shaft 11 by a predetermined amount.

The stopper pin 15 has an elongated hole 1 at both ends.
8 and 18 to the outer surface of the operating shaft 11, and are fitted into the cam grooves 17 and 17 on both sides.

The cam grooves 17 and 17 on both sides are the stopper pin 1.
The planar rotation range of the valve body 3 is limited to 90°, and the valve body 3 is maintained in an open state and a closed state, as well as a small flow open state in the middle thereof.

As shown in FIG. 5, the cam groove 17 includes a closed position holding recess 20 provided at one end of the rotation range of the stopper pin 15 so that the stopper pin 15 is unrotatably engaged in the raised position, and this recess 20. A small flow opening position holding recess 21 provided at an adjacent position in the opening direction during the pin lowering movement, a horizontal guide part 22 extending from the lower end of this recess 21 in the opening direction, and a
The horizontal guiding part 2 is located at the other end of the rotation range of 5.
The valve body 3 is formed with an open position holding recess 23 that is recessed upwardly than the opening position holding recess 23, and the valve body 3 can be changed into an open state, a closed state, and It is possible to select a low flow open state.

As shown in FIG. 5, a groove 24 is provided on the upper surface of the valve body 2 in the range between the small flow open position holding recess 21 and the open position holding recess 23 to allow movement of the stopper pin 15. It's summery.

In order to push the stopper shaft 14 into the opening/closing device of the valve body 3, the above opening/closing device is provided with an indicator portion 25 for displaying the valve opening/closing on the upper outer peripheral surface of the stopper shaft 14 to indicate the open and closed states of the valve body 3. This allows for visual confirmation.

The opening/closing device of this invention has the above structure, and as shown in FIG. 1, when the valve body 3 of the butterfly valve 1 is in the closed position, the stopper pin 1
5 is pushed up to the upper end position of the elongated hole 18 and engages in the closed position holding recess 20 in the cam groove 17, as shown by the solid line in FIG. locks the closed state.

FIGS. 6 and 7 show the relationship between the stopper pin 15 and the cam groove 17 in this closed state, and show the relationship between the stopper pin 15 and the cam groove 17.
4 is in the raised position, the indicator portion 25 protrudes from the upper end of the operating shaft 11 to visually confirm the closed state.

Next, in order to open the butterfly valve 1, a separately prepared rotating handle is attached to the removable part provided at the upper end of the operating shaft 11, and the stopper shaft 14 is moved against the elasticity of the spring 16. and press down.

When the stopper shaft 14 is pushed down, the elongated hole 18,
The stopper pins 15 move downward together along the arrow 18, and the stopper pins 15 face the small flow open position holding recess 21 in the lowered position, and when the operating shaft 11 is rotated in the opening direction via the handle, the stopper pins 15 rotate together. 15 enters into the small flow open position holding recess 21 as shown by the dashed line in FIG. 5 and FIG. The valve body 3 is held in the opening direction by the amount of rotation of the operating shaft 11, and the valve body 3 is in the open state with a small flow rate.

When the stopper shaft 14 is pushed down and the stopper pin 15 is engaged with the small flow open position holding recess 21, the stopper shaft 14 is kept in the pushed state, and the indicator part 25 is hidden inside the operating shaft 11, so that the open state can be visually confirmed.

In addition, in order to return from the small flow open state to the closed state, it is sufficient to simply turn the operating shaft 11 in the closing direction via the handle, and the stopper pin 15 is moved to the closed position holding recess 20.
When the valve body 3 is faced with the valve body 3, it rises due to the pushing force of the spring 16 and engages in the recess 20, so that the valve body 3 can be quickly returned to the closed position.

In order to change the valve body 3 from the small flow open state to the fully open state, the stopper pin 15 is lowered and removed from the small flow open position holding recess 21 by pushing in the stopper shaft 14, and the pin 15 is operated via the handle when the pin 15 is in the lowered position. It is sufficient to rotate the shaft 11 in the opening direction, and the pin 15 moves along the horizontal guide portion 22, and when the stopper shaft 14 is released from the position where the pin 15 faces the open position holding recess 23, the pin 15 moves to the opening direction. As shown by the two-dot chain line in FIG. 5, the pin 15 is engaged in the recess 23, and the valve body 3 is locked in the open state, which is rotated 90 degrees from the closed state.

9 and 10 show the relationship between the stopper pin 15 and the cam grooves 17, 17 when the valve body 3 is in the open state.

To return the valve body 3 from the open state to the closed state as described above, push down the stopper shaft 14 to disengage the stopper pin 15 from the open position holding recess 23, and rotate the operating shaft 11 in the closing direction via the handle. When the stopper shaft 14 is released during rotation, the stopper pin 15 passes through the small flow open position holding recess 21 and then engages in the closed position holding recess 20, thereby keeping the valve body 3 in the closed state. It will lock.

〔effect〕

As described above, according to this invention, the valve body can be opened and closed by pushing down the stopper shaft and rotating the operating shaft, and the opening/closing device is simple, and the handle is detachable from the operating shaft. The overall structure is simple and compact, making valve installation advantageous in terms of space.

In addition, the valve body can be held in the open state with a small flow rate, and when used in an on-off valve for gas piping, safety can be confirmed on the downstream side, and the valve body can be locked in the open and closed positions without a handle. It has the effect of being able to be transformed into

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing the usage state of the opening/closing device according to this invention when the valve is closed, Fig. 2 is a transverse plan view along the arrow - in Fig. 1, and Fig. 3 is a longitudinal sectional side view of the main parts of the same. , FIG. 4 is an exploded perspective view of the main parts, FIG. 5 is a longitudinal sectional view of the cam groove portion, and FIGS. 6 to 10.
The figures are explanatory diagrams showing the relationship between the stopper pin and the cam groove. Figure 6 is a cross-sectional view in the closed state, Figure 7 is a vertical cross-sectional view of the same as above, Figure 8 is a cross-sectional view in the low flow open state, and Figure 8 is a cross-sectional view in the closed state. FIG. 9 is a cross-sectional view of the open state, and FIG. 10 is a vertical cross-sectional view of the same. 11...Operating shaft, 13...Cover, 14...Stopper shaft, 15...Stopper pin, 16...
Spring, 17...Cam groove, 18...Elongated hole, 20...
Closed position holding recess, 21...Low flow rate open position holding recess, 22...Horizontal guide part, 23...Open position holding recess.

Claims (1)

[Scope of utility model registration request] A cylindrical operating shaft connected to the end of the valve stem so as to rotate integrally with the handle is provided with an attachment/detachment part, and a stopper shaft is incorporated inside this operating shaft so as to be movable in the axial direction. It passes through an axial elongated hole provided on both sides, and both ends protrude to the outer circumferential surface of the cylindrical operating shaft, connecting the operating shaft and the stopper shaft in the rotational direction, and allowing the axial movement of the stopper shaft within the range of the elongated hole. A limiting stopper pin is fixed to a stopper shaft, a spring is applied to the stopper shaft to bias the upward elasticity of the stopper pin into contact with the upper end of the elongated hole, and the inner periphery of a cover is fixedly arranged so as to rotatably hold the operating shaft. A cam groove that restricts the end of the stopper pin to a range of 90° is provided in the part, and this cam groove is used as a closing member provided at one end of the rotation range of the stopper pin so that the stopper pin is engaged in a non-rotatable manner in the raised position. A valve opening/closing device with a detachable handle formed by a position holding recess, a small flow open position holding recess provided adjacent to the recess, and an open position holding recess provided at the other end of the rotation range of the stopper pin.