JP2727412B2 - Sealing device for check valve in gas appliances - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve sealing device for a gas container having a pressure regulator having a connection port for connecting the gas container.

[0002]

2. Description of the Related Art A gas appliance using a small gas container is usually provided with a check valve in a connection port for connecting the gas container (for example, Japanese Patent Publication No. 5-38205). Such a check valve has a protruding portion whose tip always enters the connection port, and is mounted so as to fit into the protruding portion.
In this configuration, sealing with the connection port is performed by sealing means such as a ring.

However, if the processing accuracy of the sheet surface inside the connection port with which the O-ring comes into contact is not good, there is a problem that gas leaks, and when the O-ring is fitted to the protruding portion, foreign matter is caught and leakage occurs. Sometimes. Further, the O-ring provided on the check valve has to be sealed with the connection port with respect to the protruding portion, so that the O-ring has many finishing locations, and the number of manufacturing steps is increased.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to improve reliability against gas leakage by simplifying a seal structure of a check valve in a gas appliance. Another object of the present invention is to improve production efficiency by reducing the number of manufacturing steps and the number of parts.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a gas appliance using a gas container. 14, the protrusion 15 is formed in a substantially cylindrical shape having an outer diameter substantially the same as the outer diameter of the stem 13, and a ring-shaped seal member 16 is formed in the connection port.
Provided hermetically in the protrusion 15 at the time of disconnection of the gas container
Into the main body 16, and at the time of connection, the stem 13.
Into the sealing member 16 to make air-tight contact with each outer periphery.
In which it took measures that that enables touch.

[0006]

FIG. 1 shows a pressure regulator 10 (also called a governor) of a gas appliance using a small gas container. The pressure regulator 10 has a connection port 11 for connecting a small gas container B commonly called a gas cylinder or a cartridge.
To maintain the pressure of the discharged gas within a certain range and supply it to an operating unit such as a burner.

The connection port 11 is a substantially cylindrical opening whose axial direction is the direction in which the stem 13 of the gas container B is inserted. An example of the connection port is an insertion port member having a hole opened to the outside for inserting the stem. 21 and a mounting member 22 for mounting it to the pressure regulator body. The insertion port member 21 is circular, and has a cylindrical portion 23 projecting inward at the center, and a receiving port 24 capable of receiving the cylindrical portion 23 is formed at a substantially central portion of the mounting portion 22 ( (See FIG. 2).

Further, the inside of the receiving port 24 is an inner end portion 25 bulging inward in the radial direction, and the protruding portion 15 at the tip of the check valve 14 is connected to a hole surrounded by the inner end portion 25. It gets into the mouth. Therefore, the connection port 1 of the embodiment
1 is a mounting member 2 from the cylindrical portion 23 of the insertion member 21.
2 to the inner end 25. Therefore, it is not necessary to provide the connection port 11 with high-precision processing required as a valve seat.

The cylindrical portion 23 of the insertion port member 21 and the inner end portion 25 of the mounting member 22 are separated from each other, and a space 26 for accommodating the seal member 16 constituting the seal device of the check valve is provided therein. Is formed. Seal member 1
6 may use the same O-ring as the conventional one.
This O-ring is formed by a peripheral wall of the space 26 and a stem 1 described later.
3 and the outer peripheral surface of the protruding portion 15 are each airtightly contacted. The insertion opening member 21 and the mounting member 22 are joined by a base 27 which is caulked to an outer opening end. Reference numeral 28 denotes an external sealing member, which comes into airtight contact with a base (not shown) of the stem 13.

The check valve 14 is provided so as to be movable in the axial direction in a valve chamber 17 in the pressure regulator 10 which continues to the inside of the connection port 11, and is urged outward by the spring 12 in the axial direction. I have. The check valve 14 moves forward by the urging force of the spring 12 when the gas container B is not connected, and has the aforementioned protruding portion 15 at the distal end that enters the connection port 11. It has a length that reaches a position where it can be brought into airtight contact with the seal ring 16. The projection 15 has a stem 13
Of approximately the same size as Since such a projection 15 has a simple cylindrical outer shape, it is easy to process and quality control is easy. Approximately the same size means both seal rings
16 within the dimension range that can enter the inside of
That is to say.

In each of the drawings, reference numeral 31 denotes an internal sealing member which seals between the valve chamber opening end 32 of the pressure regulator 10 and the fitting end 33 of the mounting member 22. The gas is supplied to the valve chamber 1
7 flows into the adjustment chamber 35 and receives a pressure adjusting action by the diaphragm 36 backed up by the spring 34,
The supply to the burner or the like according to the opening and closing of the instrument plug 37 and the flow rate adjustment is conventional.

[0012]

When the gas container B is not connected to the sealing device according to the present invention, the check valve 14 urged by the spring 12, as shown in FIG.
Is moved forward, the protrusion 15 provided at the distal end thereof enters the connection port 11, and the seal member 16 is kept in a state of airtight contact with the outer peripheral surface thereof.

Next, when the gas container B is connected, the stem 13 enters the connection port 11 and the check valve 14 is retracted by the tip of the stem.
6 and instead the stem 13 enters into the sealing ring 16 and keeps hermetically contacting and sealing. In the illustrated example, the rear end 18 of the check valve 14 hits the rear surface 19 of the valve chamber 17 and overcomes the built-in spring force that causes the stem 13 to protrude, so that gas is discharged from the gas container into the valve chamber.

[0014]

Since the present invention is constructed and operates as described above, two seal rings conventionally required are provided.
Has the effect of the omitted part of only one of the sealing member 16 Ru can be performed and seal of the seal and the gas container stem 13 of the check valve 14, when it is possible to improve the reliability against gas leakage At the same time, the protrusion 15 formed on the check valve 14 is formed into a cylindrical shape having substantially the same diameter as the outer diameter of the stem, thereby facilitating the manufacture and eliminating the number of sub-seal members, thereby eliminating the need for processing the seat surface. There is an effect that the production efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a check device for a check valve in a gas appliance according to the present invention.

FIG. 2 is an enlarged sectional view of a main part when the gas container is not connected.

FIG. 3 is an enlarged sectional view of a main part when a gas container is connected.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 57-96897 (JP, U) JP-A 2-144304 (JP, U) JP 5-38205 (JP, B2)

Claims (2)

(57) [Claims] 1. A pressure regulator having a connection port for connecting a gas container, the pressure regulator having a connection port when the gas container is not connected.
The connection port 11 is closed by being urged by a spring 12 outward in the axial direction, and a check valve 14 pushed and opened by the stem 13 of the gas container when the gas container is connected so as to be movable in the axial direction. In the gas appliance provided inside of the valve 11, at least the protrusion 15 which is urged by the spring 12 and which enters the connection port when the gas appliance advances is provided at the tip of the check valve 14. It is formed in a substantially cylindrical shape having substantially the same size as the outer diameter, and is connected with a ring-shaped seal member 16.
It is provided airtight in the connection opening, and when the gas container is not connected, the protrusion 1
5 into the sealing member 16, and at the time of connection, the stem 13 enters into the sealing member 16 so that
A sealing device for a non-return valve in a gas appliance, wherein the sealing device can be in close contact . 2. An attachment member 21 having a cylindrical portion 23 for inserting a stem at the center thereof and a mounting member 22 for mounting the same to a pressure regulator main body. A space 26 for accommodating the seal member 16 between the inner end 25 of the member 22 and the cylindrical portion 23
The sealing device for a check valve in a gas appliance according to claim 1, further comprising: