JP2665798B2 - Manual operation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial Application Field) The present invention is operated by an actuator used to open and close or switch the flow of air, gas, cold and hot water, and other fluids in a pipe. The present invention relates to a manual operation device provided for a manually operated valve to be manually operated when required.

(Prior art and its problems) Generally, an automatically operated valve operated by an actuator can be manually operated for a power failure or other power source, or for inspection and trial operation. is there.

To perform the manual operation, disconnect the connection between the main shaft of the actuator or the connector connected thereto and the valve shaft, manually operate the valve shaft, and after the manual operation, the main shaft of the actuator or connected to the main shaft. The connector and valve stem must be connected.

There are various manual operation devices for this purpose.
As a typical example of the prior art, FIG. 4 shows a partial longitudinal section of a manual operation device (manual automatic switching device) disclosed in Japanese Utility Model Laid-Open No. 54-92437.

In FIG. 4, 21 is a valve shaft, 22 is an actuator, 22
a is the main shaft of the actuator 22, 23 is a socket, and 24 is a spring.

A concave groove 23a is formed at the upper end of the socket 23, and a convex ridge 22b formed at the lower end of the main shaft 22a is fitted into the concave groove 23a, and is connected so that the rotation of the main shaft 22a is transmitted to the socket 23. I have.

The lower end 23b of the socket 23 has a shaft hole 23c that fits into a valve shaft having two parallel flat surfaces 21a.
Although it can slide up and down in FIG. 1, the rotation of the socket 23 is transmitted to the valve shaft 21. In addition, socket
The spring 23 is pushed upward by the elastic force of the spring 24, and the connection between the concave groove 23a and the convex bank 22b is maintained.

Therefore, the actuator 22 transmits the rotation of the main shaft 22a to the valve shaft 21 via the socket 23, and opens / closes or switches a valve (not shown).

For manual operation, the lever hook of socket 23
The manual operation rod is connected to 23d, the socket 23 is pushed down against the elastic force of the spring 24 to disconnect the connection between the groove 23a and the ridge 22b, and if the manual operation rod is pushed down, the socket 23 is rotated. Is rotated to rotate the valve shaft 21, and the valve is rotated to open or close or switch.

Incidentally, 25 is a guide ring, and when the socket 23 is at the position shown in the figure or when the connection between the concave groove 23a and the ridge 22b is cut off by pressing down, the socket 23 and the main shaft 22a are coaxial. The guide is as follows.

In this structure, the socket 23 is provided between the main shaft 22a and the valve shaft 21.
The socket 23 must be able to move downward in order to disconnect the groove 23a and the ridge 22b, and furthermore, a spring 24 which constantly pushes the socket 23 upward in the axial direction, in the figure. It must be provided in the socket 23, and therefore, the distance between the main shaft 22a and the valve shaft 21 must be increased.

That is, in the structure shown in FIG. 4, the distance between the valve and the actuator is long, the automatic operation valve becomes large as a whole, and a large mounting space is required. Also, a bracket (not shown) for attaching the socket 23 and the actuator 22 to the valve is large, which makes it heavy and expensive.

The present invention solves the problem that the conventional manual operation device for an automatic operation valve has a large size, requires a large mounting space, is heavy and expensive, has a compact structure, and has a reliable operation. An object of the present invention is to provide an excellent manual operation device that is easy to operate.

Configuration of the Invention (Means for Solving the Problems) The present invention has the following configuration to achieve the above object.

A manually operated device for manually disconnecting and automatically operating an automatic operation valve in which a main shaft of an actuator and a valve shaft of a valve are connected directly or via a connector, the cylindrical end of the main shaft or the connector being provided. Insert a substantially cylindrical pin that is repelled outward by a spring into the bottomed hole provided in the diameter direction in the part,
This tip is fitted into a cylindrical hole formed in the outer end of the valve shaft in the axial direction, and the pin is fitted into a through hole radially provided in the side wall of the cylindrical hole by the elastic force of the spring. The main shaft or the connector is connected to the valve shaft, and a manually operated rod is inserted into the through hole together with an insertion hole provided on the same axis as the through hole in a ring fixed to the outer periphery of the outer end of the valve shaft. The connection between the main shaft or the connector and the valve shaft is released, and the valve shaft is operated by the manual operation rod.

In this case, the through-hole is preferably a U-shaped hole that is cut toward the terminal end of the outer end.

Further, the valve shaft and the ring may be formed integrally, or may be fixed by fitting a non-circular shaft hole. Further, a plurality of the through holes of the valve shaft and the insertion holes of the ring provided coaxially with the through holes may be provided.

(Operation) Since the present invention is configured as described above, it operates as follows.

When the manual operation rod is inserted into the insertion hole provided in the ring, the tip of the manual operation rod is inserted into the through hole provided in the valve shaft,
The pin inserted into the through hole is pushed into a bottomed hole provided at the cylindrical end of the main shaft of the actuator or the connector against the elastic force of the spring to disconnect the main shaft or the connector from the valve shaft. .

In this state, the valve shaft is rotated by the manual operation rod to open / close or switch the valve.

Next, when the manual operation rod is returned to the initial position and pulled out, the pin is inserted into the through hole of the valve shaft by the elastic force of the spring, and the main shaft or connector of the actuator is connected to the valve shaft, and the actuator is automatically operated by the actuator. State.

Incidentally, even if the actuator is accidentally operated with the manual operation rod inserted into the ring as described above, the connection between the actuator and the valve shaft is cut off, so that no damage is caused and there is no danger. .

In the structure of the present invention, when the through hole provided in the side wall of the cylindrical hole of the valve shaft is formed as a U-shaped hole cut toward the terminal direction of the valve shaft, the pin is attached when the main shaft or the connector of the actuator is assembled to the valve shaft. There is no need to press the bottomed hole against the spring force of the spring, and the assembly is easy.

If the ring is formed integrally with the valve shaft, machining is easy, and if the ring and the valve shaft are fitted into a shaft hole with a polygonal or chamfered circular cross section, the ring and the valve shaft are easily fixed. It is.

Further, not only one through hole provided in the valve shaft and a ring insertion hole provided coaxially with the through hole, but also
If one to three other positions are provided so as to form an angle of 180 degrees or 180 degrees, the relative position between the actuator and the valve shaft at the time of automatic operation can be extremely appropriately set to any of 90 degrees, 180 degrees, and 270 degrees. Can be easily changed.

Thus, the manual operation device of the present invention has a compact structure, operates reliably, is easy to operate, and has other excellent characteristics.

(Embodiment) FIG. 1 is a longitudinal sectional view showing an automatically operated ball valve having one embodiment of a manually operated device according to the present invention. In FIG. Ball valve, 4 is an actuator, 4a is the main shaft of the actuator 4, 3a is the valve shaft of the ball valve 3, 5 is a pin, 6
Is a spring and 7 is a ring.

A bottomed hole 4c is formed in the cylindrical tip portion 4b of the main shaft 4a in the diameter direction, and a spring 6 and a substantially cylindrical pin 5 are formed in the bottomed hole 4c.
Is inserted, and the pin 5 is springed outward by the spring force of the spring 6.

A cylindrical hole 3c is formed in the outer end portion 3b of the valve shaft 3a in the axial direction, and a through hole 3e is provided in a radial direction on a side wall 3d of the cylindrical hole 3c.

A ring 7 is fixed to the outer periphery of the outer end portion 3b using a push screw 9, and an insertion hole 7a is formed coaxially with the through hole 3e.

Then, the tip 4b is fitted into the cylindrical hole 3c, and the pin 5
Is repelled by the spring 6 and fits into the through hole 3e, and the main shaft 4a
And the valve shaft 3a are connected.

The through-hole 3e may be a U-shaped hole 3f that is cut in the distal direction as shown in the partial sectional view of FIG. 2 (a) and the partial side view of FIG. 2 (b).

In FIG. 1, the valve 3 is a ball valve for opening and closing, but may be a three-way ball valve for switching or a butterfly valve.

Next, the operation will be described based on the embodiment shown in FIGS.

FIG. 3 is an enlarged partial sectional view showing a state in which the manual operation rod 8 is inserted into the manual operation device 2.

1 to 3, the manual operation rod 8 is connected to the ring 7.
When inserted into the insertion hole 7a provided in the valve shaft 3a, the distal end of the manual operation rod 8 is inserted up to the through hole 3e provided in the valve shaft 3a. Then, the main shaft 4a of the actuator 4 is pushed into a bottomed hole 4c provided at a cylindrical end portion 4b of the main shaft 4a to disconnect the connection between the main shaft 4a and the valve shaft 3a. Third
The figure shows this state.

In this state, the valve shaft 3a is rotated by the manual operation rod 8,
The valve 3 is opened and closed.

Next, when the manual operation rod 8 is returned to the initial position shown in FIG.
The main shaft 4a of the actuator 4 and the valve shaft
3a is connected and the actuator 4 automatically operates.

Incidentally, even if the actuator 4 is erroneously operated in the state shown in FIG. 3 in which the manual operation rod 8 is inserted into the ring 7 as described above, the connection between the actuator 4 and the valve shaft 3a is disconnected. It does not cause any damage and is not dangerous.

As shown in FIG. 2, when the through hole 3e is formed as a U-shaped hole 3f which is cut toward the terminal direction of the valve shaft 3a, when the main shaft 4a of the actuator 4 is assembled to the valve shaft 3a, the pin 5 is connected to the spring 6 It is not necessary to push the bottomed hole 4c against the resilience of the spring, and the assembling is easy.

In FIG. 1, the ring 7 and the valve shaft 3a are fixed by using the set screw 9. However, if they are integrally formed, processing is easy, and the ring 7 and the valve shaft 3a can be formed into a polygon or a chamfered circle. When the shaft hole having the non-circular cross section is fitted, the ring 7 and the valve shaft 3a can be easily fixed.

Further, not only one through hole 3e provided in the valve shaft 3a and an insertion hole 7a of the ring 7 provided coaxially with the through hole 3e,
If one or three other parts are provided at an angle of 90 degrees or 180 degrees with this, the actuator 4 and the valve shaft during automatic operation are provided.
The relative position in the rotation direction with respect to 3a can be very easily changed to any of 90 degrees, 180 degrees, and 270 degrees.

Advantageous Effects of the Invention The present invention is configured and operates as described above in detail, so that the following excellent effects can be obtained.

(1) The structure is compact.

(2) Operation is reliable.

(3) The operation is easy.

(4) Lightweight and inexpensive.

(5) The relative position of the rotation direction between the actuator and the valve can be changed very easily to any of 90 degrees, 180 degrees, and 270 degrees.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an automatic operation ball valve having one embodiment of the manual operation device of the present invention, and FIG.
It is the fragmentary longitudinal section and the fragmentary side view which show other examples of the through-hole of the valve shaft shown in the figure. FIG. 3 is an enlarged partial sectional view showing a state in which a manual operation rod is inserted into the manual operation device shown in FIG. FIG. 4 is a partial longitudinal sectional view showing a conventional example of a manual operation device. 1 ... automatic operation valve, 2 ... manual operation device, 3 ... ball valve, 3a ... valve shaft, 3b ... outer end, 3c ... cylindrical hole, 3d ... side wall, 3e ... through hole, 3f …… U-shaped hole, 4…
… Actuator, 4a …… spindle, 4b …… tip, 4c ……
Hole with bottom, 5 ... Pin, 6 ... Spring, 7 ... Ring, 7a ...
... insertion hole, 8 ... manual operation rod.

Claims (5)

(57) [Claims] 1. A manually operated device for manually operating an automatic operation valve having a main shaft of an actuator and a valve shaft of a valve connected directly or via a connector by disconnecting said main shaft or said main shaft. A substantially cylindrical pin, which is resiliently repelled outward by a spring, is inserted into a bottomed hole provided in a diametrical direction at the cylindrical end of the connector, and this end is formed axially at the outer end of the valve shaft. The main shaft or the connector is connected to the valve shaft by fitting the pin into a through hole radially provided in a side wall of the cylindrical hole by the resilient force of the spring. Inserting a manually operated rod into the through-hole together with an insertion hole provided on the same axis as the through-hole in a ring fixed to the outer periphery of the outer end of the ring to disconnect the main shaft or the connector from the valve shaft. A manual operation device in which the valve shaft is operated by the manual operation rod. 2. The manual operating device according to claim 1, wherein said through hole is a U-shaped hole cut toward a terminal direction of said outer end. 3. The manual operating device according to claim 1, wherein said valve shaft and said ring are formed integrally. 4. The manual operating device according to claim 1, wherein the valve shaft and the ring are fixed by fitting a non-circular shaft hole. 5. The manual operation device according to claim 1, wherein a plurality of said through holes of said valve shaft and said plurality of said insertion holes of said ring provided coaxially therewith are provided.