JPS637745Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a valve operating device, and in particular, to a valve operating device that opens and closes a lift valve in the direction of the rotation axis only by rotating the operating section. be.

This valve operation device can be used as a valve device for resetting the overflow prevention valve of a gas tank equipped with an overflow prevention valve, or as a valve operation device that opens and closes the valve body in the direction of the rotation axis by rotating the motor in the forward and reverse directions.

[Prior art and its problems] This type of valve operating device is disclosed in Japanese Patent Application Laid-open No. 144161/1983. This device has been adopted in a gas tank equipped with an overflow prevention valve, and as shown in FIGS. The operating shaft 20 for rotating the closing member 1 forward and backward is coupled to the closing shaft 1a, and the valve shaft 21 of the valve body 2 and the operating shaft 20 are interlocked, and further, the operating shaft 20
A pin 30 biased to protrude in the radial direction is provided at its lower end, and this can rotate and move up and down in a constant trajectory only along the groove 41 of the cylinder 40 fixed to the main body 4. It is something.

In this conventional device, the direction in which the operating shaft 20 is pushed and turned is regulated by the relationship between the pin 30 and the groove 41, and the flow path in the cock body 4 is controlled in accordance with the axial component of the movement of the operating shaft 20. It is opened and closed regardless of the rotational position of the closing member 1.

In other words, the pin 3 is released only when the operating shaft 20 is in the fully open position.
0 engages with the intermediate step portion 42 of the groove portion 41 and the operating shaft 2
0 is held in the middle of the vertical stroke, and the valve body 2 is also located between the closure 1 and the overflow prevention valve 10 and held in the open state.

In other positions, the operation shaft 20 is placed at the highest position or the lowest position due to the relationship between the pin 30 and the groove 41, and the valve body 2 is placed at the valve seat portion of the closure 1.
1 or the valve seat of the overflow prevention valve 10 is closed, and the flow path inside the lock main body 4 is blocked regardless of the position of the closure 1.

As described above, in the above-described valve body 2, the valve body 2 is placed in an open state only at a specific position of the operating shaft 20, and
In other positions, the valve is closed and becomes a so-called ON-OFF operation valve.

However, in this conventional type, sealing is required at two parts: the sliding surface of the closing member 1 as a rotating part, and the outer circumferential surface of the valve shaft 21 that passes through the closing member 1 in the axial direction. In other words, there are many dangerous locations for external leakage.

This is because the valve body 2 is operated by the valve shaft 21 that passes through the closure 1 as a rotating part.

[Problem] The present invention is such that the valve body is opened and closed by a rotating part that rotates integrally with the operation shaft, and the valve body is opened and closed only when the operation shaft is in the fully open position. An object of the present invention is to enable a valve body to be opened and closed within a fluid circuit in the direction of the rotation axis only by rotation of a rotation portion.

[Means] The technical means of the present invention for solving the above problems will be explained using the reference symbols of the embodiments. A driving cylinder 3 is mated to rotate integrally with the rotating portion, and a cam is mated to the cylinder body 13 which overlaps in the axial direction from below the driving cylinder 3.
The driven cylinder 5 has a cylindrical pair, a raised part 54 protruding from the inner periphery of the driven cylinder 5, and the driven cylinder 5 moves within a certain range from the initial position of the driven cylinder 5 when the driving cylinder 3 is in the fully closed position. A stopper 14 is provided on the cylinder body 13 in order to restrict the rotation range of the driven cylinder 5 to the rotated terminal position to a small range below the rotation range of the driving cylinder 3.
, a valve body 2 that is coupled to the cylinder body 13, a leg body 25 provided on this valve body 2, a first spring 22 that biases this valve body 2 in the valve closing direction, and a driven cylinder 5 that is connected to the valve body 2. The second spring 32 biases the body 2 in the valve opening direction, and the biasing force of the second spring 32 is set larger than that of the first spring 22. The raised portion 54 of the valve body 2 is arranged to face and approach the lower end of the leg body 25 of the valve body 2, and the driven cylinder 5 and the cam part of the driving cylinder 3 are made to engage only when the driving cylinder 3 is in the fully open position. This is because the pair relationship is set in such a manner that escape is possible by closing and rotating the drive cylinder 3.

[Operation] The operation of the above-mentioned technical means of the present invention will be explained with reference to FIG. 4 used to explain the embodiment.

When each part is in the initial state, the valve body 2 is closed by the first spring 22, and at this time, the driven cylinder 5 and the driving cylinder 3 are both in the initial state, and the cam parts of both are in the initial state. It has shifted in the circumferential direction and has come off.

In this state, the drive barrel 3 and the driven barrel 5 are in contact with each other via one of the convex portions of the cam portion, and furthermore, the biasing force of the second spring 32 in the direction of the drive barrel 3 acts on the driven barrel 5. Therefore, a certain amount of frictional force acts on the contact area between the two.

Next, when the rotating portion is rotated to open, the drive cylinder 3 is rotated to the fully open position, but at the same time, the driven cylinder 5 is rotated to the end of its rotation range due to the frictional force. Since the rotation range of the driven cylinder 5 is set to be small, the driven cylinder 5 is first rotated to the terminal position, and the protrusion 54 of the driven cylinder 5 and the valve body 2 are rotated.
The legs 25 of

When the drive barrel 3 is further rotated toward the fully open position and the rotating portion is moved to the fully open position, that is, the drive barrel 3 is moved to the fully open position, the cam portions of the drive barrel 3 and the driven barrel 5 align with each other, It will be in an engaged state.

Since the driven cylinder 5 is urged toward the driving cylinder 3 by the second spring 32, the driven cylinder 5 moves in the direction of the driving cylinder 3 by a distance corresponding to the mutual engagement of the cam parts. At this time, since the protrusion 54 of the driven cylinder 5 and the legs 25 of the valve body 2 are aligned as described above, the valve body 2 is moved in the valve opening direction by the driven cylinder 5, and the valve is opened. I will do it.

Next, when the rotating part is rotated to close from this fully open position, the cam parts of the driven cylinder 5 and the driving cylinder 3 remain engaged and both rotate back to the initial position of the driven cylinder 5. Due to this slight rotation at the initial stage of the return rotation, the raised portion 54 of the driven cylinder 5 and the leg body 25 of the valve body 2 are displaced from each other, and the valve opening force by the second spring 32 is applied to the valve body 2. I will not do it. Therefore, only the biasing force of the first spring 22 acts on the valve body 2, which causes the valve body 2 to come into contact with the valve seat and enter the valve closed state.

When the rotating part is further rotated to close, the drive cylinder 3
Then, the driven cylinder 5 is further rotated to return, and first,
The stopper 14 prevents the driven cylinder 5 from rotating. Since the driven cylinder 5 and the driving cylinder 3 are only engaged by a cam part that can be removed by the closed rotation of the driving cylinder 3, when the driving cylinder 3 is further rotated to the initial position, both the driven cylinder 5 and the driving cylinder 3 are engaged with each other. The engagement is released and the drive cylinder 3 is returned to its initial position.

Thereafter, the above operation will be repeated by rotating the rotating portion in the forward and reverse directions.

[Effects] Since the present invention has the above configuration, it has the following unique effects.

When the valve body 2 opens and closes, the operating range of the rotary part is a very small range at the fully open position (the range required for engaging and disengaging the protruding part 54 and the leg body 25), so the valve body 2 is in the ON position as described above. −Off operation.

In order to open and close the valve body 2, no operation other than rotation of the rotating part is required, and there is no need for a valve stem or the like to open and close the valve body 2 from the outside as in the past. Seals are no longer required and the risk of external leakage is reduced.

Since the driving cylinder 3 and the driven cylinder 5 overlap in the axial direction, the diameter of the valve operation part can be made smaller than that in the case where the driving cylinder 3 and the driven cylinder 5 overlap in the radial direction.

It is also possible to reverse the arrangement positions of the driving cylinder 3 and the driven cylinder 5, but in this case, the distance between the rotating part and the driving cylinder 3 increases, and the distance between the rotating part and the driving cylinder 3 increases accordingly. A long interlocking means is also required. On the other hand, in the case of the present invention, since the driving cylinder 3 is arranged closer to the rotating part than the driven cylinder 5,
Unlike the above case, the interlocking part between the rotating part and the drive cylinder 3 does not become long.

[Example] Next, an example of the present invention described above will be described in detail with reference to the drawings.

In this embodiment, the valve operating device of the present invention is incorporated into a gas tank equipped with an overflow prevention valve as shown in FIGS. 1 and 7, and the closure 1 functions as the rotating portion described above. The main body of the overflow prevention valve 10, which is disposed facing below the passage hole 16 of the closure 1, functions as the cylindrical body 13 described above.

The first spring 22 is interposed between the valve body 2 and the closure 1, and is configured to bias the valve body 2 toward the upstream side.

A pair of protrusions 31, 31 are disposed facing each other on the upper surface of the drive cylinder 3, and these protrusions 31, 31 engage a pair of engagement recesses 15, 15 disposed on the lower surface of the closure 1.
It is becoming more and more engaged.

Next, the valve body 2 is attached to a valve seat 1 provided at the upper end of the cylindrical body 13.
The valve body 2 and the cylinder body 13 are disposed facing each other so as to be in contact with each other, and a pair of the valve body 2 and the cylindrical body 13 is secured. That is, a pair of legs 25, 25 are made to protrude downward from the valve body 2, and these legs 25, 25 are connected to the cylindrical body 13.
A pair of vertical guide grooves 1 formed in the head 17 of
8 and 18 separately.

The upper end of the cylindrical body 13 is a head 17 having a larger diameter than the lower body, and the driving cylinder 3 and then the driven cylinder 5 are fitted from above so as to overlap with each other from above. In addition, in this fitted state, a pair of engagement protrusions 34 protruding from the inner periphery of the drive cylinder 3,
34 engages with the lower surface of the head 17 of the cylindrical body 13 to ensure that it does not come off.

The driven cylinder 5 and the driving cylinder 3 are arranged in a cam pair, and for this reason, the cam recesses 53, 53 provided on the upper surface of the driven cylinder 5 and the cam protrusions 33, 33 provided on the lower surface of the driving cylinder 3. are designed to interlock.

Further, the leg body 2 of the valve body 2 is attached to the inner periphery of the driven cylinder 5.
Protrusions 54, 54 corresponding to 5, 25 protrude facing each other. The lower parts of these raised parts 54, 54 are formed by a stopper 14 formed by cutting out the lower part of the cylinder body 13,
It is designed to engage with a margin within 14,
The driven cylinder 5 can be rotated in the circumferential direction only within a range corresponding to the difference between the width between the stoppers 14 and the width of the raised portions 54, 54. Furthermore, as shown in FIG. 3, the inner diameter of the drive cylinder 3 is set larger than the diameter of the body 19 of the cylinder 13.
The legs 25, 25 of the valve body 2 can be inserted into the gap between the two.

Further, the inner diameter of the driven cylinder 5 is formed to be larger than the body 19 of the cylinder 13, so that only the protrusions 54, 54 provided on the inner circumference thereof come into contact with the body 19 of the cylinder 13. There is.

Therefore, as will be described later, when the closing member 2 is in the fully open position, the lower ends of the legs 25, 25 of the valve body 2 are connected to the raised portion 5.
4 and 54. That is, the valve body 2 and the driven cylinder 5 come into contact with each other only at the terminal position of the driven cylinder 5.

Further, a flange 43 is provided near the bottom of the cylinder 13, and the flange 43 and the driven cylinder 5 are connected to each other.
A second spring 32 is interposed between the lower end surface and the lower end surface. Therefore, the driven cylinder 5 is biased by the second spring 32 in the direction in which the valve body 2 is opened.

With the above configuration, the drive cylinder 3 is rotated with the rotation of the closure 1 as a rotating part, and the valve body 2 is rotated.
ON-OFF operation.

This operation is ensured by a series of movements shown in A to D of FIG. 4, and will be explained below based on FIG. 4.

In the initial closed state, the valve element 2 is in the closed state, and the cam protrusion 33 of the driving cylinder 3 and the cam recesses 53, 53 of the driven cylinder 5 are misaligned with each other. in a state. Next, when the closure 1 is rotated to open, the driving cylinder 3 is rotated integrally with it, and the driven cylinder 5 is also rotated in the same direction. 25 are in a state of opposing proximity.

When the closing member 1 is further rotated to open and reaches the fully open position, the driving cylinder 3 reaches the fully open position and the cam portion of the driven cylinder 5 coincides with each other, resulting in the state shown in FIG. cam convex part 33 and cam concave part 53 in the state
When the legs engage with each other and become the state shown in Figure C, the legs 2
5 and 25 and the raised portions 54 and 54, the valve body 2 is lifted in accordance with the state of the cam portion and instantaneously opened.

Thereafter, when the closing member 1 is rotated to close, the legs 25, 25 are moved to the raised portion 54, as shown in FIG. 54, and the valve body 2 is removed from the first spring 22.
The valve is closed by the urging force of. When the drive cylinder 3 is further rotated closed from this state, the cam parts are disengaged from each other, and only the drive cylinder 3 is independently rotated closed, and each part returns to the state shown in A at the fully closed position.

[Brief explanation of the drawing]

Fig. 1 is an exploded view of the main parts of the embodiment of the present invention, Fig. 2 is an exploded perspective view of the driving cylinder 3, driven cylinder 5, and valve body 2;
The figure is a sectional view of the main part showing the fitted state of the drive cylinder 3 and the cylinder body 13, Figure 4 is an explanatory diagram of the operation, Figures 5 and 6 are explanatory diagrams of the conventional example, and Figure 7 is the implementation of the present invention. It is an assembled sectional view of an example, and in the figure, 2...valve body, 3...driving cylinder, 5...driven cylinder, 1
2... Valve seat, 13... Cylinder body, 14... Stopper, 22... First spring, 25... Leg body, 32...
Second spring, 54... protrusion.

Claims (1)

[Scope of utility model registration request] The valve body is opened and closed in the axial direction by a rotating part that rotates integrally with the operating shaft, and the valve body is opened and closed when the operating shaft is in the fully open position. A fixed cylindrical body 13 provided in
Then, a driving cylinder 3 that goes around this cylinder 13 and pairs with it so as to rotate integrally with the rotating part, and a cam that overlaps in the axial direction from below this driving cylinder 3 and pairs with the cylinder 13. This driven cylinder 5 rotates within a certain range from the initial position of the driven cylinder 5 when the cylindrical paired driven cylinder 5, the raised part 54 protruding from the inner periphery of the driven cylinder 5, and the driving cylinder 3 are in the fully closed position. A stopper 14 provided on the cylinder body 13 in order to restrict the rotation range of the driven cylinder 5 up to the final position of the drive cylinder 3 to a small range below the rotation range of the drive cylinder 3; body 2, a leg body 25 provided on the valve body 2, a first spring 22 that biases the valve body 2 in the valve-closing direction, and a first spring 22 that biases the driven cylinder 5 in the valve-opening direction of the valve body 2. 2 springs 3
2, the biasing force of the second spring 32 is
While setting it larger than that of the spring 22,
The raised portion 54 of the driven tube 5 only at the end position of the driven tube 5
is located opposite to and close to the lower end of the leg body 25 of the valve body 2, and the driven cylinder 5 is opened only when the driving cylinder 3 is in the fully open position.
and a cam portion of the driving cylinder 3 are engaged with each other, and the pairwise relationship of the cam portions is set such that the cam portion can be released by closing and rotating the driving cylinder 3.