JPS6355733B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve device, for example, a valve device for opening and closing a passage of fluid such as high-pressure gas used to open and close a circuit breaker.

An example of a conventional valve device of this type is shown in FIG. 1 of the accompanying drawings, in which reference numeral 1 indicates a cylinder (not shown) on which a piston (not shown) for driving a circuit breaker slides. A cylinder head,
The cylinder head 1 is provided with an opening 2 that communicates with the inside of the cylinder. 3 is a valve body attached to the cylinder head 1, 4 is a valve slidably provided in the support portion 5 of the valve body 3, and 6 is a spring that connects the valve 4 to a valve seat 7 having a sealing function. The pressure is applied to prevent the compressed gas in the high pressure chamber 8 from flowing out. 9
is an operating rod that slides through the valve body 3 and the valve 4, and presses the spring 6 against the valve 4, and a nut 10 is fitted to the lower end of the operating rod to press the spring 6 against the valve 4. The valve 4 is engaged with the valve seat 7 to separate the valve 4 from the valve seat 7, and is configured to form a gap A between the valve 4 and the valve 4 when the valve is closed. Next, reference numeral 11 is a spring that acts to push the operating rod 9 upward in the drawing relative to the valve body 3. 12 is the support shaft 13
This is an operating lever that rotates around , and in the illustrated state, the operating rod 9 is pushed down according to the spring force of the spring 11. 14 is a sealing member between the valve 4 and the support portion 5 of the valve body 3. 15 is a cylindrical portion of the valve 4, 16 is a rib portion of the valve, and B and C indicate their wall thicknesses. In addition, 4a is the upper end surface of the valve 4,
This is the contact surface with the valve body 3 in the valve open state.

The conventional device is configured as described above, and its operation will be explained next.

In the state shown in FIG. 1, the valve device is closed and the circuit breaker is in the closed state. That is, the operating rod 9 is pushed down by the rotation of the operating lever 12 to the position where the gap A exists between the valve 4 and the nut 10, and therefore, due to the action of the spring 6,
The valve 4 is pressed against the valve seat 7. As a result, communication between the high pressure chamber 8 and the opening 2 of the cylinder head 1 is blocked by the valve seat 7, and the compressed gas in the high pressure chamber 8 is prevented from flowing out into the opening 2, that is, into the cylinder (not shown). .

In order to open the circuit breaker from this state, first, the operating lever 12 is rotated clockwise at high speed to disengage the operating lever 12 and the operating rod 9. As a result, the spring 11 pushes the operating rod 9 upward, but the operating rod 9 moves through the gap A and tightens the nut 10.
When the valve 4 engages with the valve 4, the valve 4 is pulled upwardly and away from the valve seat 7 by the nut 10. As a result, the high pressure chamber 8 and the opening 2 communicate with each other and the high pressure chamber 8
The compressed gas inside flows through the opening 2 into a cylinder (not shown) provided with a piston for driving the circuit breaker, thereby opening the circuit breaker.

FIG. 2 shows a state in which the valve 4 is pulled upward in this way and the contact surface 4a of the valve 4 is stopped by contacting the valve body 3. In this state, the movement of the operating rod 9 is controlled by the nut 10. is stopped in a state in which it contacts the rib portion 16 of the valve 4.

On the other hand, the circuit breaker must perform its opening operation as quickly as possible in terms of its function, and it is clear that the valve 4 must also operate as quickly as possible for this purpose.

However, in the conventional valve device as described above, in order to stop the high-speed movement of the valve 4 and the operating rod 9 (kinetic energy of both) only at the contact surface 4a of the valve 4 with the valve body 3, the contact surface 4a It was necessary to increase the area of the cylindrical portion 15 and to make the cylindrical portion 15 strong. Furthermore, in order to stop the high-speed movement of the operating rod 9 (kinetic energy of the operating rod) with the rib portion 16 of the valve 4, the rib portion 16 is also required to be strongly constructed.

For the above reasons, even in response to the demand for weight reduction necessary to speed up the opening operation of the valve 4, it is not possible to reduce the weight, and therefore the valve opening operation, that is, the circuit breaker The drawback was that the opening operation was slow.

SUMMARY OF THE INVENTION An object of the present invention is to provide a valve device that eliminates the drawbacks of conventional devices as described above, reduces the weight of the valve, and speeds up the opening operation of the valve and, in turn, the opening operation of the circuit breaker. It is.

In order to achieve this object, the present invention provides that the abutments for stopping the valve and the operating rod at the final point of the valve opening operation are abutments at different positions of the valve body and are independent abutments. It is characterized by certain things.

Hereinafter, the present invention will be explained based on the accompanying drawings, FIGS. 3 to 5, showing the first, second, and third embodiments thereof.

First, in FIG. 3 showing the first embodiment, the cylinder head 1, the opening 2, the spring 6, the valve seat 7, the high pressure chamber 8, the nut 10, the spring 11, the operation lever 12, the support shaft 13, and the seal member 14 are all Also, reference numeral 21 is a valve, and the wall thicknesses E and F of the cylindrical portion 22 and rib portion 23 are thin, and the upper end surface is similar to that of the conventional valve 4. Similarly, a contact surface 21a is formed. Next, reference numeral 24 denotes a contact surface 24 with the valve body 25.
a, and when the operating rod 24 is in contact with the valve body 25, the contact surface 21 of the valve 21
A gap H is formed between the valve body 25 and the valve body 25. The contact surfaces 25a and 25b of the valve body 25, which the contact surface 21a of the valve 21 and the contact surface 24a of the operating rod 24 contact, are formed at different positions, respectively.

FIG. 3 shows a state in which the valve is open and the operating rod 24 is in contact with the valve body 25 through contact surfaces 24a and 25b.

The present invention is configured as described above, and its operation will be explained next.

The initial operation for opening the valve is to disengage the operating lever 12 and the operating rod 24 by rotating the operating lever 12 clockwise at high speed, as in the case of the conventional device shown in FIG. This action causes the spring 11 to pull the operating rod 24 upward, but first, the nut 10, which is connected to the tip of the operating rod 24, tightens the valve 24.
1 and then pulls up the valve 21 to open the space between the valve 21 and the valve seat 7. As a result, the compressed gas in the high pressure chamber 8 passes between the valve 21 and the valve seat 7, reaches the opening 2, and then flows into a cylinder (not shown) in which a circuit breaker driving piston is provided. , open the circuit breaker.

At this time, the valve 21 and the operating rod 24 are pulled up at high speed. First, the contact surface 24a of the operating rod 24 hits the contact surface 25b formed on the valve body 25, so that the upward movement of the operating rod 24 is stopped, and then ,
Only the valve 21 moves upward by the gap H due to its inertial force, and the abutting surface 21a of the valve 21 abuts the abutting surface 25a of the valve body 25, stopping its upward movement and opening the valve as shown in FIG. state.

Next, a second embodiment will be explained with reference to FIG.

The second embodiment differs from the first embodiment in that the position where the operating rod comes into contact with the valve body for stopping is provided outside the valve body. That is, in the figure, the reference numeral 31 is a stopper fixed to the upper surface of the valve body 25 in the figure and has a contact surface 31a, and 32 is the contact surface 31a of the stopper 31.
The operating rod has a contact surface 32a at its tip, which is in contact with the stopper 31. When the operating rod 32 is in contact with the stopper 31, the contact surface 21a of the valve 21 and the contact surface 25a of the valve body 25 are connected.
Similarly to the first embodiment, a gap H is formed between the two.

Therefore, in the valve opening operation, the valve 21 and the operating rod 32 are pulled up at high speed, so that the contact surface 32a of the operating rod 32 first touches the contact surface 3 of the stopper 31.
The operating rod 32 is stopped by hitting 1a,
Thereafter, only the valve 21 moves upward by the gap H due to inertia, and the abutting surface 21a of the valve 21
It is stopped by hitting the contact surface 25a of No.5.

Next, a third embodiment will be explained with reference to FIG.

This third embodiment is an embodiment in which the spring 11 is incorporated inside the valve body 41, and the position where the spring 11 comes into contact with the valve body 41 for stopping the operating rod is also provided inside the valve body 41. This is an example.

In such a third embodiment, the valve body 41
is provided with a boss portion 42 that protrudes toward the inside, and an operating rod 43 is slidably inserted through the center of the boss portion 42. An oval hole 42a is formed in the perpendicular direction, and the spring 11 is fitted and guided around the outer periphery of the boss portion 42, and its lower end is supported by the boss portion. Further, a ring 44 is provided at the upper end of the spring 11 and is slidably fitted around the outer periphery of the boss portion 42. , contact surfaces 44a, 41a when the operating rod 43 is raised
is formed. Furthermore, the ring 44 and the operating rod 4
3 is integrally fixed by a pin 45 that passes through the oval hole 42a of the boss portion 42 and through the ring 44 and the operating rod 43 at right angles to the axis. Therefore, the operating rod 43 is fixed to the spring 11. , ring 44 and pin 45, are constantly pressed upward.

Note that when the valve opening operation causes the contact surface 41a of the valve body 41 and the contact surface 44a of the ring 44 to come into contact with each other and the operating rod 43 is stopped, the contact surface 21a of the valve 21 and the contact surface 44a of the valve body 41 contact each other. Similar to the first and second embodiments, a gap H is formed between the surface 41b and the surface 41b.

Since the present embodiment is configured as described above, in the valve opening operation, the valve 21 and the operating rod 43 are pushed up at high speed. The operating rod 43 is stopped by the abutment surface 44a abutting the abutment surface 41a of the valve body 41, and then only the valve 21 moves upward by the gap H due to inertia, and the abutment surface 21a of the valve 21 touches the abutment surface 41a of the valve body 41. Contact surface 41b
It can be stopped when it hits.

As is clear from the above description, in the present invention, the contact surface 21a of the valve 21 only needs to have the function of stopping the valve 21, and its momentum is also reduced by the spring 6. Thickness E of cylindrical portion 22
can be made thinner than the wall thickness B of the cylindrical portion 15 of the conventional valve 4, and since the rib portion 23 of the valve 21 does not have the function of stopping the operating rods 24, 32, 43, the valve 21 The wall thickness F of the rib portion 23 can also be made thinner than the wall thickness C of the rib portion 16 of the conventional valve 4. Therefore, the weight of the valve 21 can be made lighter than the conventional valve 4.

Therefore, the valve device of the present invention reduces the weight of the valve, and as a result, the valve can be opened at high speed, and the circuit breaker can be opened at high speed.

In each of the above embodiments, the valve device in the piston device of the circuit breaker driving cylinder was explained, but the present invention is not limited to this, and the present invention can be applied to any other valve device. This embodiment is also no different from each of the embodiments described above.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a conventional valve device, showing the valve in the closed state, Fig. 2 shows the valve in Fig. 1 in the open state, and Fig. 3 shows the valve in the open state.
4 and 5 are longitudinal cross-sectional views of the first, second and third embodiments of the valve device of the present invention, each showing the valve open state. In the figure, 1... cylinder head, 2... opening, 3, 25, 41... valve body, 4, 21...
Valve, 6, 11... Spring, 7... Valve seat, 8... High pressure chamber, 9, 24, 32, 43... Operating rod. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1 A valve disposed opposite to a valve seat provided in a flow path through which fluid flows, a valve body in which this valve is movably housed, a valve that is movably inserted through the valve body and the above-mentioned valve, and that is engaged with one end. an operating rod having a stop portion; a first member attached to the operating rod to press the valve against the stop portion;
and a second spring that is interposed between the valve body and the operating rod and drives the operating rod in the valve opening direction by a return force, wherein the valve body is provided with a valve opening spring. A valve device comprising: a first stopper that the operating rod contacts at a predetermined position during operation; and a second stopper that the valve contacts at the end of the valve opening operation.