JP2003021250A - Valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To open or close a valve element with high accuracy by improving the strength of a valve. SOLUTION: This valve is provided with a body 12 having a cylindrical part 22 on its approximately central part, and further having a flange part 30 engaged with an opening part of a tank on its outer peripheral part, a housing 13 accommodated inside the cylindrical part 22 and made out of a metallic material, a first seal member 16 held between the cylindrical part 22 and one end face of the housing 14, and the valve element mounted inside the housing 14 and energized in the direction of press-contacting with the first seal member 16 at its one end part under the action of the elastic force of a spring member 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve, for example, which is attached to an opening of a tank in which a fluid is sealed and which guides the fluid inside the tank to the outside by opening and closing a valve body.

[0002]

2. Description of the Related Art Conventionally, a valve has been widely used to open and close an opening of a tank in which a fluid (for example, xenon gas) is sealed. This valve generally includes a body, a spring member mounted inside a housing housed in the body, a valve body that is displaced by the spring member, and a housing, and the valve body is acted on by a spring force. The seat is seated on the seat to maintain the airtightness of the fluid inside the tank, and the valve body is pressed against the spring force of the spring member to open the valve so that the fluid inside is released to the outside. Operate the function to derive to.

[0003]

In the valve according to the prior art, the housing, which is housed inside the body and in which the spring member is interposed between the housing and the valve body, is made of a resin material. .

According to the present invention, since the housing is made of a metallic material, the housing can be more surely accommodated in the body, and the deformation of the valve body is suppressed, so that the valve body can be opened and closed with high accuracy. An object is to provide a valve capable of performing an operation.

[0005]

In order to achieve the above-mentioned object, the present invention provides a body having a cylindrical portion having a through hole formed in a substantially central portion thereof, and a part of the body is housed inside the cylindrical portion. A housing formed of a metal material, an annular first seal member sandwiched between the cylindrical portion and one end surface of the housing, and a spring force of a spring member mounted inside the housing. A valve body whose one end is brought into contact with the seal member under operation, and the valve body is displaced against the spring force of the spring member, whereby the valve body is separated from the first seal member. The through hole and the inside of the housing communicate with each other.

Further, it is preferable that an engaging portion to be fitted to the opening portion of the tank is formed on the outer periphery of the body, and an annular second seal member sandwiched between the engaging portion and the opening portion is fitted to the engaging portion. . By providing the second seal member, it is possible to prevent the fluid from leaking from between the opening portion of the tank and the engaging portion.

Further, it is preferable that the first seal member and the second seal member are made of fluororubber. In particular,
Since the first seal member and the second seal member are made of fluororubber, it is possible to maintain a stable sealing force against a fluid such as xenon gas.

Further, according to the present invention, in a valve mounted in an opening of a tank in which xenon gas is sealed, a valve has a cylindrical portion having a through hole formed in a substantially central portion thereof, and the opening is provided at an outer peripheral portion thereof. A body having an engaging portion to be fitted, a portion of which is housed inside the cylindrical portion, and a housing formed of a metal material, and sandwiched between the cylindrical portion and one end surface of the housing, An annular first seal member made of fluororubber, and a second seal member made of fluororubber sandwiched between the engaging portion and the opening,
A valve body mounted inside the housing and having one end abutting against the first seal member under the action of a spring force of a spring member, wherein the valve body is displaced against the spring force of the spring member. By doing so, the valve body is separated from the seal member, and the through hole and the inside of the housing communicate with each other.

By providing the valve configured as described above at the opening of the tank in which the xenon gas is sealed,
Since the durability of the valve is improved, it can be used for a longer period of time in the treatment using this type of xenon gas.

Further, according to the present invention, by displacing the valve body against the spring force of the spring member, the valve body is separated from the first seal member and the fluid inside the tank is led to the outside. It Therefore, by forming the housing from a metal material, the strength of the housing is improved and the housing is prevented from being deformed, so that the valve body can be opened and closed with high accuracy.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A valve according to the present invention will be described below in detail with reference to the accompanying drawings, with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a valve according to an embodiment of the present invention.

The valve 10 includes a body 12 formed of a plate-like material and having a substantially circular shape with a substantially central portion bulging and curved, a housing 14 housed in the substantially central portion of the body 12, the body 12 and the housing. An annular first seal member 16 made of fluororubber sandwiched between the first seal member 16 and the valve body 20 is pressed by the spring force of the spring member 18.

A hollow cylindrical portion 22 is formed in the body 12 by bulging the substantially central portion as described above.
Further, the cylindrical portion 22 is provided at a substantially central portion of the upper surface of the cylindrical portion 22.
Through hole 24 communicating with the inside of the. Also,
A screw portion 26 is formed on the outer peripheral surface of the cylindrical portion 22.

The lower portion of the cylindrical portion 22 has a flat surface portion 28 extending radially outward, a vertical portion 29 standing upright from the flat surface portion 28 and extending parallel to the screw portion 26, and the vertical portion 29.
And a flange portion (engagement portion) 30 that is curved from the outer peripheral direction toward the outer peripheral direction, and is radially inward between the end portion of the screw portion 26 and the end portion of the flat portion 28 of the cylindrical portion 22. And a convex portion 32 that protrudes inward.

A pipe joint 33 to which a tube or the like (not shown) is connected is screwed into the screw portion 26, and a tank 34 (see FIG.
A fluid (for example, xenon gas) inside (see) is led to a tube or the like (not shown) via the pipe joint 33 or the like.

An annular second seal member 36 made of fluororubber is mounted inside the flange portion 30. When the flange portion 30 is mounted in the opening 38 of the tank 34, the second seal member 36 is mounted. Since 36 is sandwiched between the flange portion 30 and the opening portion 38 of the tank 34, the tank 3
The fluid inside 4 is prevented from leaking outside.

The fluororubber used for the first seal member 16 and the second seal member 36 has excellent durability against chemicals as compared with the conventionally used synthetic rubber. Therefore, since the durability is not changed by the fluid (for example, xenon gas) inside the tank 34 by adopting the fluororubber, the first seal member that seals the fluid inside the tank 34 against the outside air. 16
The durability of the second seal member 36 is further improved as compared with the conventional one.

The convex portion 32 is formed so as to project inward in the radial direction of the cylindrical portion 22 by being pressed inward in the radial direction by a press machine (not shown) or the like, and the screw portion 2 of the convex portion 32 is formed.
On the 6 side, a tapered inclined surface 42a that gradually increases in diameter is formed.

A large-diameter portion 40 is formed on the outer peripheral surface of the housing 14 made of a metal material, preferably Fe-based material, on the side of one end portion thereof.
The housing 14 is housed integrally with the body 12 by being caulked inside. The inclined surface 42a of the convex portion 32 and the tapered inclined surface 42b of which the diameter gradually decreases on the hole portion 44 side of the large diameter portion 40 are caulked so as to be fitted to each other. That is, by forming in this way, the body 12 and the housing 14 are connected more firmly. The housing 14 made of a metallic material may be surface-treated.

The housing 14 has a hollow inside, and a hole portion 44 communicating with the inside of the housing 14 is formed at a substantially central portion on the other end side. The diameter of the hole portion 44 is the inside diameter of the housing 14. It is made smaller.

The valve body 20 having a substantially H-shaped cross section disposed inside the housing 14 is made of a metallic material, and has a seat portion 46 that abuts against the first seal member 16 at one end surface thereof. A pressure receiving portion 48 that is recessed by a predetermined length in the axial direction of the valve body 20 is formed in the radial direction of the portion 46. The valve body 20 made of a metallic material may be subjected to surface treatment or the like.

The valve 10 according to the embodiment of the present invention is
It is basically constructed as described above. Next, its operation and action and effect will be explained. The valve 10 is attached to the tank 34 in which the fluid is sealed,
The state where 0 contacts the first seal member 16 and the fluid in the tank 34 is not led out will be described as an initial state.

In the valve 10, the vertical portion 29 is pressed outward in the radial direction by a jig or the like (not shown), and the protruding portion 49 is formed.
The protrusion 49 is engaged with the inner peripheral surface of the opening 38 of the tank 34 and is swaged to be integrally attached (see FIG. 3).

As shown in FIG. 3, with respect to the screw portion 26 of the cylindrical portion 22 of the valve 10 mounted on the tank 34,
The pipe joint 33 connected to a tube or the like (not shown) is screwed and connected.

Therefore, in the initial state, the housing 14
Of the valve member 20 is biased in the direction in which the valve member 20 is separated from the housing 14 under the action of the spring force of the spring member 18 which is interposed between the valve member 20 and the valve member 20, and the seating portion 46 of the valve member 20 makes the first seal It is in contact with the member 16. That is, the valve body 20 is in contact with the first seal member 16, whereby the communication between the outside air and the inside of the housing 14 is blocked.

As shown in FIG. 2, the seat portion 46 of the valve body 20 resists the spring force of the spring member 18 by pressing the pressure receiving portion 48 of the valve body 20 from above with the pin member 50. The through hole 24 of the cylindrical portion 22 and the inside of the housing 14 are in communication with each other, apart from the one seal member 16.

As a result, the fluid inside the tank 34 (for example, xenon gas or the like) passes from the hole 44 of the housing 14 between the valve body 20 and the housing 14, and the body 12
It is led out to a tube or the like (not shown) from the through hole 24.

Further, when the pin member 50 is separated from the pressure receiving portion 48 of the valve body 20 in order to return to the initial state, the seating portion 46 of the valve body 20 is acted on by the spring force of the spring member 18 to cause the first seal. By sitting on the member 16, the housing 1
The communication between the inside of 4 and the outside air is cut off (see FIG. 1). As a result, the fluid inside the tank 34 is prevented from being discharged to the outside.

As described above, in the present embodiment, the rigidity strength of the housing 14 can be improved by forming the housing 14 from a metal material, so that the valve body 2
When 0 is pressed against the spring force of the spring member 18, the housing 14 does not deform under the pressing action.
Further, when the cylindrical portion 22 is pressed from the outer peripheral direction by a press machine or the like (not shown) to form the convex portion 32 and the housing 14 is caulked and stored, the housing 14 may be deformed under the pressing action of the press machine or the like. Absent. That is, the housing 1
Since 4 is prevented from being deformed, a linear opening of the valve body 20 with respect to the pressing force of the pin member 50 can be obtained, and a more accurate opening / closing operation of the valve body 20 can be performed.

Further, by bringing one end surface of the housing 14 into contact with the first seal member 16, the fluid housing 1
4 and the inside of the cylindrical portion 22 are cut off from each other, and the valve body 20 is brought into contact with the first seal member 16 so that the inside of the fluid housing 14 communicates with the through hole 24 of the body 12. Is shut off.

[0032]

According to the present invention, the following effects can be obtained.

That is, since the strength is improved by the housing made of a metal material, the housing is deformed when being pressed by the compression force of the spring member when the valve is opened and when it is crimped to the cylindrical portion. Is prevented. As a result, a linear opening of the valve body with respect to the pressing force applied to the valve body can be obtained, and a more accurate opening / closing operation of the valve body becomes possible.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a valve according to an embodiment of the present invention when the valve is closed.

FIG. 2 is a vertical cross-sectional view of the valve according to the embodiment of the present invention when the valve is open.

FIG. 3 is a vertical cross-sectional view of the valve according to the embodiment of the present invention when assembled in a tank.

[Explanation of symbols]

10 ... Valve 12 ... Body 14 ... Housing 16 ... 1st seal member 18 ... Spring member 20 ... Valve body 22 ... Cylindrical part 24 ... Through hole 26 ... Screw part 28 ... Plane part 29 ... Vertical part 30 ... Flange part 32 ... Convex Part 33 ... Pipe joint 34 ... Tank 36 ... Second seal member 38 ... Opening part 40 ... Large diameter parts 42a, 42b ... Inclined surface 44 ... Hole part 46 ... Seating part 48 ... Pressure receiving part 49 ... Projection part 50 ... Pin member

Claims (4)

[Claims] 1. A body having a cylindrical portion in which a through hole is formed in a substantially central portion, a housing part of which is housed inside the cylindrical portion and made of a metal material, the cylindrical portion, and An annular first seal member that is sandwiched between the one end surface of the housing, and a valve body that is mounted inside the housing and has one end abutting against the seal member under the action of the spring force of a spring member. The valve body is displaced against the spring force of the spring member, whereby the valve body is separated from the first seal member and the through hole and the inside of the housing communicate with each other. Valve to do. 2. The valve according to claim 1, wherein an engaging portion to be attached to an opening portion of the tank is formed on an outer periphery of the body, and the engaging portion has an annular shape sandwiched between the engaging portion and the opening portion. The second seal member is attached to the valve. 3. The valve according to claim 1, wherein the first seal member and the second seal member are made of fluororubber. 4. A valve mounted in an opening of a tank filled with xenon gas, having a cylindrical portion having a through hole formed in a substantially central portion thereof, and having an outer peripheral portion engaged with the opening. A body having a joint portion, a housing part of which is housed inside the cylindrical portion and made of a metal material; An annular first seal member, a second seal member formed of fluororubber and sandwiched between the engagement portion and the opening, and a spring force of a spring member mounted inside the housing. A valve body whose one end abuts against the first seal member under the action of, and the valve body is displaced against the spring force of the spring member, whereby the valve body is separated from the seal member. The through hole and the housing A valve that communicates with the inside of the valve.