JPH0520932Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field and overview of the invention] The present invention relates to the structure of a sliding valve, particularly a cylindrical valve. By ensuring that the two are in uniform pressure contact,
This improves the sealing performance between the cylindrical valve and the valve chamber.

[Prior art and its problems] As shown in Fig. 6, the conventional sliding valve
1 and an outlet 12 in the valve chamber 10 of the main body 1,
A cylindrical valve A rotated by an operating shaft 4 is housed in a pair of pairs, and the cylindrical valve A
As shown in Fig. 5, it is made of an elastic material and has a C-shaped cross section.
Passage holes 20, 20 corresponding to the outlet 1 and the outlet 12 are bored.

This cylindrical valve A is constructed by cutting a slit into a cylinder with an outer diameter slightly larger than the inner diameter of the valve chamber 10, or has an outer diameter that matches the inner diameter of the valve chamber 10. The valve chamber 10 is constructed by cutting a slit in a cylinder and widening the edges thereof, and is housed in the valve chamber 10 under pressure in the radial direction.

In this sliding valve, the outer circumferential curved surface of the cylindrical valve A is brought into pressure contact with the inner circumferential surface of the valve chamber 10 by the return force in the radial direction of this slide valve, and thereby the outer circumferential curved surface of the semi-cylindrical body 2 and the valve Sealing performance between the chamber 10 and the inner circumferential surface of the chamber 10 is ensured.

However, this method has a problem in that the sealing performance between the outer circumferential curved surface of the cylindrical valve A and the inner circumferential surface of the valve chamber 10 is poor.

This is because although the cylindrical valve A is housed in the valve chamber 10 under pressure, the outer circumferential curved surface of the cylindrical valve A does not match the inner circumferential surface of the valve chamber 10. This is because the pressure contact state is non-uniform.

[Technical Problem] The present invention solves the problem of accommodating the cylindrical valve A in the valve chamber 10 and rotating or linearly moving the cylindrical valve A while pressurizing it in the radial direction. A sliding valve that can be opened and closed,
In order to improve the sealing performance between the outer circumferential surface of the cylindrical valve A and the inner circumferential surface of the valve chamber 10, the outer circumferential curved surface of the cylindrical valve A and the inner circumferential curved surface of the valve chamber 10 are brought into uniform pressure contact. At the same time, it is an object of the present invention to reduce the variation in pressure contact force between products.

[Technical Means] The technical means of the present invention taken to solve the above problems is as follows. ,2
It is composed of pressure contact bodies 3, 3 that are fitted in a tapered fitting state at both ends of the semi-cylindrical bodies 2, 2, and a spring that biases the pressure contact bodies 3, 3 in a direction toward each other. .

[Effect] The above technical means works as follows.

This cylindrical valve A has a pressure contact body 3, a semi-cylindrical body 2,
In this state, the pressure contact bodies 3, 3 are urged toward each other by a spring. Therefore, valve chamber 1
0, the semi-cylindrical bodies 2, 2 are
It is held between the pressure contact bodies 3 and 3 and is urged outward in the radial direction. Here, since the outer circumferential curved surface of the semi-cylindrical bodies 2, 2 of the cylindrical valve A and the inner circumferential curved surface of the valve chamber 10 are set to the same curved surface, the outer circumferential curved surface of the semi-cylindrical bodies 2, 2 is the same as that of the valve chamber 10. It is pressed almost uniformly to the inner circumferential curved surface.

Moreover, this pressure contact force is determined by the spring that urges the pressure contact bodies 3, 3 toward each other and the wedge action of the tapered fitting portion of the pressure contact body 3 and the semi-cylindrical body 2. By setting the urging force of the spring to a predetermined value in advance, this pressing force becomes approximately constant. In other words, the variation in this pressure contact force from product to product is reduced.

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

The entire outer circumferential curved surface of the semi-cylindrical bodies 2, 2 is the valve chamber 10.
Since it is pressed almost uniformly against the inner circumferential surface of the cylindrical valve A, the sealing performance between the cylindrical valve A and the valve chamber 10 is improved.
Further, adjustment work for this purpose becomes unnecessary.

The semi-cylindrical body 2,
Since the pressure contact force between the valve chamber 2 and the valve chamber 10 is determined, the pressure contact force for each product can be made constant by controlling the quality of the spring and the tapered fitting portion. In other words, there is less variation in the operating torque for each product to ensure a predetermined sealing performance.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4.

A first embodiment is shown in FIGS. 1 and 2.

As shown in FIG. 2, this sliding valve has an inlet 11 and an outlet 1 facing each other on the side of a cylindrical body with one end open.
2 are disposed to form a main body 1, and a valve chamber 10 is formed by attaching a lid 13 to the open end of this main body 1. Inside this valve chamber 10, semi-cylindrical bodies 2, 2
A cylindrical valve A is housed therein. The cylindrical valve A is made up of a pressure contact body 3, 3, and a spring 8 which is a biasing means. 4
is penetrated through the outer periphery in an airtight state, and the lower end of this operating shaft 4 engages with the upper press member 3 located at the uppermost end of the cylindrical valve A.

As shown in FIG. 1, the pressure contact bodies 3, 3 have a truncated cone shape, and have a pair of locking pieces 3 on their side walls.
Further, a locking portion 35 for locking the end of the spring 8 is formed on the small-diameter end surface of the pressure contact body 3.

Further, as shown in the figure, the semi-cylindrical bodies 2, 2 are formed so that their outer circumferential curved surfaces coincide with the inner circumferential surface of the valve chamber 10, and pressure contact is made at both ends of the inner circumferential curved surfaces. Tapered parts 22, 22 corresponding to the side wall surface of the body 3
is formed. Furthermore, slits 21, 21 into which locking pieces 30, 30 are inserted are cut in the center of both ends of this semi-cylindrical body 2, and these slits 21, 21 correspond to the inlet 11 and outlet 12 of the main body 1 at positions shifted by 45 degrees from the slits 21, 21. Passage holes 20, 20 are bored.

As shown in FIG. 2, the above-mentioned cylindrical valve A is made of a pair of semi-cylindrical bodies in which the small-diameter sides of the press-contact bodies 3, 3 are fitted with locking pieces 30, 30 into slits 21, 21. The pressure contact bodies 3, 2 are fitted into the upper and lower ends of the valve chamber 10, and are housed in the valve chamber 10 in a state where the pressure contact bodies 3, 3 are biased toward each other by a spring 8.

Since this sliding valve is configured as described above, when the operating shaft 4 is rotated, the locking pieces 30, 30
The slits 21 and 21 are engaged with each other, and the cylindrical valve A is reliably rotated via the upper pressure contact body 3. As a result, the semi-cylindrical bodies 2, 2
When the passage holes 20, 20 of the main body 1 are aligned with the inlet 11 and the outlet 12, the inlet 11 and the outlet 12 are communicated with each other, and this sliding valve is in an "open" state. When the operating shaft 4 is further rotated from this position, the passage holes 20, 20 will be misaligned with the inlet 11 and outlet 12 of the main body 1, and when they are completely misaligned, this sliding valve will be in the "open" state. becomes.

Next, a second embodiment will be described based on FIG.

This sliding valve has a lower pressing member 3 in contact with the bottom wall of the main body 1, and a spring 8 is applied to the upper pressing member 3 from above.
The semi-cylindrical bodies 2, 2 are brought into pressure contact with the inner circumferential wall of the valve chamber 10 by applying pressure.

Furthermore, this device has an outlet 12 formed in the bottom wall of the main body 1 and a passage hole 37 formed in the center of the lower pressing body 3. When installed in the valve chamber 10, this passage The hole 37 and the outlet 12 are always in communication.

Therefore, when the passage hole 20 and the inlet 11 are aligned, this sliding valve is in an "open" state, and when they are completely misaligned, it is in a "closed" state.

In the above embodiment, the circuit is opened and closed by rotating the cylindrical valve A, but as shown in FIG.
The opening and closing operations may be performed by sliding in the axial direction.

[Brief explanation of drawings]

Fig. 1 is an exploded external view of a cylindrical valve A according to a first embodiment of the present invention, Fig. 2 is a sectional view of a sliding valve according to the first embodiment of the present invention, and Fig. 3 is a second embodiment of the present invention. A cross-sectional view of an example slide valve, FIG. 4 is a cross-sectional view of a slide valve that opens and closes the cylindrical valve A by sliding it in the axial direction, and FIG. 5 is an external view of the conventional example of the cylindrical valve A. , FIG. 6 is a sectional view of a conventional sliding valve, and in the figure, A: cylindrical valve, 2: semi-cylindrical body, 3: pressure contact body, 10: valve chamber.

Claims (1)

[Scope of utility model registration request] A sliding valve in which a cylindrical valve A is accommodated in a valve chamber 10 and a circuit can be opened and closed by rotating or linearly moving the cylindrical valve A under pressure in a radial direction. The valve A is made up of a pair of semi-cylindrical bodies 2, 2 having an outer circumferential curved surface that matches the inner circumferential surface of the valve chamber 10, and a press-fitting body 3 that is fitted in a tapered fit state at both ends of the semi-cylindrical bodies 2, 2. , 3, and a spring that biases the pressure contact bodies 3, 3 in a direction toward each other.