JPH0412317Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to the improvement of a valve used for filling high-pressure gas or high-pressure oil and maintaining airtightness, and the valve core is attached from the opposite direction to the gas or oil filling port. This relates to a high-pressure valve that can be used.

[Prior Art] As shown in Fig. 1, in a conventional high-pressure valve, the valve core 2 is screwed into the valve stem 1 from above the valve opening. It was formed on the tapered surface of.

[Problem to be solved by the invention] For this reason, when high back pressure acts, the entire valve core is pushed upwards, and the valve core tightening that was acting on the seal portion 3 of the body packing of the valve core 2 is There was a problem in that the biasing force was reduced and airtightness between the seal portion 3 of the body packing and the valve stem 1 was insufficient.

In addition, since the head and body portions of the valve core 2 are made separately and integrated by caulking, there is a problem that the number of parts is large.

This invention was devised as a result of various studies to solve the above-mentioned problems, and the valve stem is formed in the completely opposite direction to the valve stem, so that the valve core can be attached from below the valve stem. At the same time, this valve core is an attempt to provide a high-pressure valve core in which the conventional head and body parts are integrally formed.

[Means for Solving the Problems] The present invention provides a female thread 8 and an R-shaped sealing surface 9 on the inner surface of the valve stem 6 sequentially from below, and an opening 10 and a female thread 11 in the deep part of the sealing surface. A V-shaped tapered surface 12 and a small opening 13 are formed, while an inverted cup-shaped valve core body 14 has a small hole 15 at the top and is formed around the small hole by slit processing. A pipe-shaped body packing 17 is installed at an intermediate position on the outer surface, and a male thread 18 that can be screwed into the female thread 11 of the valve stem is provided slightly below the body packing 17. A valve port 19 is provided in the inverted cup-shaped valve core body 14, and a shaft having a cylindrical valve packing 20 having a diameter larger than the valve port 19 and a valve packing receiver 21 are fixed from below by caulking. 22, the tip 23 of the shaft protrudes above the small hole 15 of the inverted cup-shaped valve core body, and after inserting the compression spring 24 from above the shaft 22, the upper end of the shaft is caulked and fixed. This is a high-pressure valve in which a valve core 7 is configured and the valve core 7 is attached to the valve stem 6 from below. Therefore, when high pressure acts on the valve core 7, the body packing 17 attached to the valve core body 14 is pushed upward, and the joint between the V-shaped tapered surface 12 of the valve stem 6 and the body packing 17, the so-called Since the tightening force is increased at the seal portion of the body packing, airtightness with the valve stem 6 at this seal portion is ensured.

[Embodiments of the present invention] The present invention will be described in detail as follows based on the drawings. FIG. 2 shows the state in which the high pressure valve of the present invention is attached to the base 5 of a pressure vessel 4, and this high pressure valve is constructed by a combination of a valve stem 6 and a valve core 7.

The valve stem 6 of the present invention has a female thread 8 connected to the mouthpiece 5 of a pressure vessel etc. on its inner surface sequentially from the bottom.
An R-shaped sealing surface 9 is provided, and in the deep part of the sealing surface there is an opening 10 larger than the outer diameter of the valve core 7, which will be described later, and a female thread 11 that can be screwed into a male thread 18.
A V-shaped tapered surface 12 to which the body packing 17 can be pressed and a small opening 13 larger than the outer diameter of the upper end of the valve core body are formed in this order.

FIG. 3 is a half-longitudinal cross-sectional view of the valve core 7 of the present invention. The inverted cup-shaped valve core body 14 has a small hole 15 at the top and a window 16 formed by slotting around the small hole. A pipe-shaped body gasket 17 is installed at an intermediate position on the outer surface, and a male thread 18 that can be screwed into the female thread 11 of the valve stem is provided slightly below the body gasket 17, and a valve stem is provided at the lower end. A mouth portion 19 is provided. A shaft 12 to which a cylindrical valve packing 20 having a diameter larger than the valve opening 19 and a valve packing receiver 21 are fixed by caulking is inserted from below into the inverted cup-shaped valve core body 14, and the tip of the shaft is fixed. 23 protrudes upward from the small hole 15 of the inverted cup-shaped valve core body, and the compression spring 2 is inserted from above the shaft 22.
4 is inserted, the upper end of the shaft is caulked and fixed.

Note that the lower end of the compression spring 24 is placed on the top of the valve core body 14. Therefore, the shaft 22
The valve gasket 20 fixed thereto is lifted upward and comes into close contact with the valve port 19, so that airtightness can be maintained.

As described above, in the present invention, the valve stem 6 is screwed into the mouthpiece 5 of a high-pressure container, etc., and the valve opening of the valve stem is formed in the completely opposite direction to the conventional one, so that the valve core 7 is inserted from below the valve stem. When installed, the pipe-shaped body gasket 17 is pressed against the V-shaped tapered surface 12 of the valve stem 6, so even if the body gasket becomes sagging or high pressure is applied, The body packing 17 is strongly pressed against the tapered surface 12 with a force proportional to the pressure, and airtightness is not impaired at all. Moreover, since the head and body portions of the high valve core 7 are integrally formed compared to conventional ones, the number of parts is reduced and the manufacturing cost is reduced, which is an extremely useful idea from an industrial perspective.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the conventional valve core, FIG. 2 is a longitudinal sectional view of the present invention, and FIG. 3 is a half longitudinal sectional view of the valve core of the present invention. 1 and 6 are valve stems, 2 and 7 are valve cores,
3 is the seal part of the body packing, 4 is the pressure vessel, etc., 5
is a cap, 8 is a female thread, 9 is an R-shaped sealing surface, 10
1 is an opening, 11 is a female thread, 12 is a V-shaped tapered surface, 13 is a small opening, 14 is a valve core body, 1
5 is a small hole, 16 is a window, 17 is a body gasket, 18 is a male screw, 19 is a valve opening, 20 is a valve gasket, 21
22 is a shaft, and 23 is a compression spring.

Claims (1)

[Scope of utility model registration request] A female thread 8 and an R-shaped sealing surface 9 are sequentially provided on the inner surface of the valve stem 6 from below, and an opening 10, a female thread 11, a V-shaped tapered surface 12, and a small opening 13 are provided in the deep part of the sealing surface. On the other hand, the inverted cup-shaped valve core body 14 is provided with a small hole 15 at the top and a window 16 formed by slit processing around the small hole, and a pipe is provided at an intermediate position on the outer surface. A body gasket 17 having a shape of A shaft 22 to which a cylindrical valve packing 20 and a valve packing 21 having a diameter larger than the valve port 19 are fixed by caulking is inserted from below into the valve core body 14, and the tip end 23 of the shaft is inserted into the inverted cup shape. Protrude upward from the small hole 15 of the valve core body, and
After inserting a compression spring 24 from above 2, the upper end of the shaft is caulked and fixed to form a valve core 7, and the valve core 7 is attached to the valve stem 6 from below.