JPS6222707Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a valve for a high-pressure gas container.

The purpose of this invention is that when the main valve of a high-pressure gas container is opened to release gas, if an excessive flow of gas occurs due to an earthquake or disaster, the shutoff valve is activated to instantly and automatically release the gas. An object of the present invention is to provide a valve for a high-pressure gas container, which is capable of shutting off the shutoff valve and preventing the operation of the shutoff valve when the gas container is inverted for extraction of residual gas.

The gist of the present invention is that (A) a main valve seat is formed at the upper end edge of the inflow channel that communicates with the discharge channel of the valve body that is attached to a high-pressure gas container, and the diameter is expanded at the bottom of the main valve seat. (B) A mushroom-shaped shutoff valve with a diameter smaller than the inner diameter of the inflow path is arranged in the inflow path, and the valve is shut off by a spring member supported at the lower part of the inflow path. supporting the valve so that it can float;
The excess gas causes the shutoff valve to float and contact the sub-valve seat, and at the same time the sub-valve seat is closed due to the pressure difference, and (C) the shutoff valve is not activated when the gas container is inverted. This is a high-pressure gas container valve characterized in that a locking member is attached to the valve body so as to be able to move forward and backward so as to prevent the locking member from moving forward and backward.

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

(Structure) In the figure, 1 is a valve body, which is attached to a high-pressure gas container (not shown) by means of a threaded portion 2. 3 is a discharge path, and 4 is an inflow path.
Reference numeral 5 denotes a main valve seat, which is formed at the upper end edge of the inlet passage 4 communicating with the discharge passage 3. The main valve seat 5 is opened and closed by a main valve 7 which is raised and lowered by operating a handle 6. A sub-valve seat 8 is formed at the bottom of the main valve seat 5 and is formed by an enlarged diameter step. 9 is a safety valve.

Reference numeral 10 is a mushroom-shaped shutoff valve that opens and closes the sub-valve seat 8, and its outer diameter is smaller than the inner diameter of the inflow passage 4. 11 is an O-ring attached to the shutoff valve 10. Reference numeral 12 denotes a valve stem, which includes a locking collar 13 and a radial guide vane plate 14. Reference numeral 15 denotes a spring member disposed at the lower part of the inflow passage 4, and is supported by a support nut 16 screwed onto the lower end of the inflow passage 4. The shutoff valve 10 is supported by a spring member 15 via a guide vane plate 14 so as to be floating. Reference numeral 17 denotes a pressure difference resolving protrusion protruding from the upper surface of the shutoff valve 10, and its upper end surface is located below the main valve seat 5 when the sub-valve seat 8 is open.

Reference numeral 20 denotes a locking member attached to the valve body 1 so as to be movable forward and backward, and is adapted to prevent the shutoff valve 10 from operating when the gas container is inverted. The locking member 20 is O
It is equipped with a head 22 with a ring 21 and small diameter legs 23, the head 22 is slidably fitted into the mounting hole 24 formed in the valve body 1, and the leg 23 is fitted into the mounting hole 24.
It protrudes into the inflow channel 4 through a small hole 25 formed at the bottom. The head 22 is irremovably supported by a retaining ring 26 screwed into the opening of the mounting hole 24, and is in contact with an adjusting screw 27 screwed into the retaining ring 26. 28 is a return spring wound around the leg 23 within the mounting hole 24. The adjustment screw 27 and the return spring 28 cooperate to lock the locking member 2.
0 moves forward and backward. The end of the leg 23 of the locking member 20 is connected to the locking collar 1 of the valve stem 12 of the shutoff valve 10.
3 or comes into contact with the valve stem 12, the operation of the shutoff valve 10 is prevented. Note that the adjustment screw 27 may be operable with a fingertip.

(Function) The high-pressure gas container valve of the present invention attaches the threaded portion 2 of the valve body 1 to a high-pressure gas container (not shown), fills the container with high-pressure gas, and then connects the discharge path 3 to a gas device (not shown). It is used by connecting etc. handle 6
When the main valve 7 is opened by operating the main valve 7, the gas is discharged to the gas equipment via the inlet passage 4, the sub-valve seat 8, the main valve seat 5, and the discharge passage 3. Under normal circumstances, an appropriate amount of gas flows through the inflow channel 4.
Since the water flows inside, the shutoff valve 10 is supported by the spring member 15 without floating up. Further, the legs 23 of the locking member 20 are always retracted and held outside the movement trajectory of the locking collar 13, as shown by solid lines in FIG. If an accident occurs in the piping system of gas equipment due to an earthquake, disaster, etc. during gas release, and the amount of gas flowing through the inlet channel 4 suddenly increases, resulting in so-called overflow gas, the overflow gas Therefore, the shutoff valve 10 floats up from the spring member 15 and contacts the sub-valve seat 8, as shown in FIG. 8, the release of gas is instantly and automatically shut off. When the cutoff valve 10 closes the sub-valve seat 8 and gas release is blocked, the upper end surface of the differential pressure resolving protrusion 17 protrudes above the main valve seat 5, as shown in FIG.

To return the cutoff valve 10 to its original state after gas release is cut off, operate the handle 6 to lower the main valve 7. The shutoff valve 10 is pushed down, and at the same time as the main valve seat 5 is closed, the differential pressure is eliminated and the shutoff valve 10 returns to its original state.

When extracting the residual gas in the high-pressure gas container using a vacuum pump, the locking member 2
When the high-pressure gas container is inverted with the legs 23 of the locking collar 13 advanced as shown by the chain lines in FIG. Even if an attempt is made to close the valve seat 8, the leg 23 of the locking member 20 locks the locking collar 13, which prevents the operation of the cutoff valve 10 and prevents the sub valve seat 8 from closing. The residual gas can be quickly extracted by fully opening the valve 7.

(Effect) As can be easily understood from the above explanation,
According to the present invention, when the main valve of the high-pressure gas container is opened and gas is released due to an earthquake, disaster, etc., an excessive flow of gas occurs, the shutoff valve is activated to instantly and automatically release the gas. In addition, when the gas container is inverted to extract residual gas, the locking member can prevent the shutoff valve from operating, so the residual gas can be quickly removed by fully opening the main valve. It is possible to extract the

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is an explanatory diagram of the operation of the shutoff valve, and Fig. 3 is an enlarged sectional view of the main parts. be. 1: Valve body, 3: Discharge path, 4: Inflow path, 5: Main valve seat, 7: Main valve, 8: Sub-valve seat, 10: Mushroom-shaped shutoff valve, 15: Spring member, 17: Differential pressure resolving protrusion ,2
0: Locking member.

Claims (1)

[Claim for Utility Model Registration] A main valve seat is formed at the upper end edge of the inlet passage communicating with the discharge passage of the valve body which is attached to a high-pressure gas container, and a diameter expansion stage is formed at the lower part of the main valve seat. A mushroom-shaped shutoff valve having a smaller diameter than the inner diameter of the inflow passage is arranged in the inflow passage, and the shutoff valve can be floated by a spring member supported at the lower part of the inflow passage. The valve is supported by the overflow gas and brought into contact with the auxiliary valve seat, and at the same time, the auxiliary valve seat is closed by the differential pressure, so that the shutoff valve is activated when the gas container is inverted. A valve for a high-pressure gas container, characterized in that a locking member is attached to the valve body so as to be movable forward and backward so as to prevent this.