JPS5934799Y2 - LP gas container valve - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an LP gas container valve that automatically shuts off a gas passage when a part of gas supply equipment or equipment is damaged.

Conventionally, in LP gas container valves, if a part of the gas supply equipment or equipment connected to the gas filling port of the valve body breaks while the valve is open, and a large amount of raw gas is released, the inside of the valve body A structure that automatically shuts off the gas passage is known from Japanese Patent Publication No. 50-27891.

This device is shown in Fig. 3. When a part of the gas supply equipment or equipment connected to the gas filling port A breaks, the valve body B is pushed up by the strong gas jet force, and the valve body B is in close contact with the valve seat C and closes the valve opening.

By the way, in the container valve employing the above structure, when gas is to be filled from the gas filling port A, the valve body B is pushed down by the gas pressure and comes into close contact with the valve seat E, causing the gas passage F to close.
It is of little practical value as it cannot be filled with gas due to the blockage.

Further, since both the valve body B and the valve seat C are in close contact with each other on a flat surface, it is difficult for the valve body B and the valve seat C to come into close contact with each other when the pressure of the gas in the gas container is low, resulting in a lack of sealing performance and the risk of gas leakage.

This device solves the above problems, operates reliably to prevent gas from being released even if the gas supply equipment or a part of the equipment is damaged, and facilitates the filling of gas into containers. The purpose is to

The basic tank bottom of this design is a cylindrical shape that houses a ball that opens and closes the valve port leading to the gas filling port in a gas passage in a valve body that has a gas filling port and a gas blowout port, and prevents the ball from escaping. A notch groove opened to the side is provided at the upper end of the ball catch, and the ball is held slightly above the gas outlet by screwing the ball catch into the gas passage, and the notch is screwed into the gas passage. The groove faces the gas outlet, and if a part of the gas supply equipment or equipment is damaged, the ball is pushed up by the gas flow pressure and closes the valve opening.

Furthermore, when filling with gas, even if the ball is pressed against the ball seat, gas can flow into the container from around the ball and the ball seat.

Furthermore, if the gas pressure in the gas container becomes abnormally high and the safety device is activated, the ball is positioned slightly above the gas outlet so that it does not block the gas outlet and the ball seat is closed. Since the notched groove faces the gas outlet, the gas is blown out smoothly and the specified amount of blown out is ensured.

Hereinafter, embodiments of this invention will be described based on the drawings.

In FIGS. 1 and 2, a valve body 1 is provided with a connecting portion 2 with a gas container at its lower portion, and a gas passage 3 provided at its axial center.

In the center of the gas passage 3, a pair of downward-facing valve seats 4 and upward-facing valve seats 5 are provided vertically with a valve port 6 in between.

A valve chamber 7 whose axis is aligned with the valve port 6 is provided in the upper part of the valve body 1, and an on-off valve 9 fitted with an O-ring 8 to maintain airtightness is installed in the valve chamber 7 in the axial direction. The interior is slidable.

This on-off valve 9 closes the valve seat 5 and closes the valve port 6, and a pin 10 of a required length is provided at the center of the lower surface of the on-off valve 9.
is installed protrudingly.

This pin 10 is used to open the valve port 6 by pushing down a ball 11 which is installed in the gas passage 3 and is in close contact with the valve seat 4.

A valve stem 12 is connected to the upper surface of the on-off valve 9.
is the gland nut 1 screwed onto the top of the valve body 1.
It is screwed into 3.

A handle 14 is attached to the upper end of the valve stem 12.

A gas filling port 15 communicating with the valve chamber 7 is formed in the upper side surface of the valve body 1, and a gas supply device or equipment can be connected to the gas filling port 15.

In addition, a valve chamber 1 that communicates with the gas passage 3 has a gas outlet 16 on the side opposite to the gas filling inlet 15 on the central side of the valve body 1.
7, and a safety valve 19 that is in close contact with the valve seat 18 of the gas outlet 16 is installed in this valve chamber 17.
9 is pressed against the valve seat 18 by a compression spring 20.

21 is a cap that serves as a spring holder. The gas passage 3 is equipped with a lightweight ball 11 that is large enough to fit tightly against the valve seat 4 and close the valve port 6, and that can float under the gas flow pressure. A cylindrical ball seat 22 is screwed onto the gas passage 3.

This ball seat 22 is shown in FIG.
is formed to have a smaller diameter than the gas passage 3, and the cylindrical portion 23
The inner hole 24 has a smaller diameter than the ball 11, and a cutout groove 25 is formed in the upper end of the cylindrical portion 23 in the shape of a single character or a cross. I will learn not to block 24.

A required gap m is formed between the cylindrical portion 23 and the inner peripheral surface of the gas passage 3.

A notch 27 is formed in the center of the ball seat 22, extending from the cylindrical portion 23 to a part of the male threaded portion 26 and communicating with the inner hole 24.

Therefore, gas flows from the inner hole 24 and the notch 27 to the gas passage 3 through the gap m.

28 is a threaded portion formed in the center of the gas passage 3, and 29 is a slotted groove at the lower end of the ball seat 22, with which the tip of the driver is engaged.

By screwing the ball seat 22 into the gas passage 3, the ball 11 is held so as to be located slightly above the gas outlet 16, and the notch groove 25 opened laterally forms the gas outlet. By facing 16, gas can be blown out smoothly.

The container valve of this invention is used by connecting the connecting portion 2 to a gas container and connecting the gas filling port 15 to a gas supply device or equipment.

When the on-off valve is pulled up by turning the handle 14 from the open/closed state shown in FIG.
, the inner hole 24, the gap m, the valve port 6, and the gas filling port 15 to be supplied to gas supply equipment or equipment.

At this time, the ball 11 either descends and remains stationary at the upper end of the ball holder 2 in the same way as in the valve closed state, or it floats due to the flow pressure of the gas to such an extent that it does not come into close contact with the valve seat 4.

If a part of the gas supply equipment or equipment is damaged in the above-mentioned open state, the flow resistance in the gas passage will drop rapidly, and the gas in the gas container will suddenly blow into the gas passage 3. It starts to come out.

At this time, the ball 11 is momentarily pushed up by the flow pressure of the gas and comes into close contact with the valve seat 4.

When the ball 11 comes into close contact with the valve seat 4, the valve port 6 is closed, and the gas blowing stops instantly.

When the on-off valve 9 is lowered with the ball 11 in close contact with the valve seat 4, the pin 10 protruding from the lower surface of the on-off valve 9 comes into contact with the ball 11, and as the on-off valve 9 descends, the ball 11 is pushed down. To eliminate close contact between a ball and a valve seat 4.

Therefore, gas can be used immediately after the damaged gas supply equipment or equipment is repaired.

The safety valve 19 always closes the gas outlet 16 when the pressure in the gas container is normal, and operates only when the gas pressure in the gas container becomes abnormally high. to lower the pressure inside the gas container.

At this time, the gas flowing through the gas passage causes the ball 11 to float up from the ball seat 22 and move in the direction of blocking the gas outlet 16. However, in this invention, the ball 11 is positioned above the gas outlet 16. Shio Su, Ball 11
does not block the gas outlet 16 and impede the flow of gas.

In addition, the notch groove 25 of the ball seat 22 is connected to the gas outlet 1.
6, the gas flows smoothly from the notch groove 25 to the gas outlet 16, and the specified safe blowout amount (834 kg/h) is ensured.

To fill an empty gas container with gas, open/close valve 9 and valve seat 5
The ball 11 is filled from the gas inlet 15 after breaking the contact with the ball 11, but at this time the ball 11 is pressed down by the flow pressure of the gas and comes into close contact with the upper end of the ball seat 22.

A notch groove 25 and a gap m are formed at the upper end of the ball seat 22, and a notch 27 is formed in the middle, so that gas flows from the gas filling port 15 through the valve chamber 7 and the valve port 6. The gas supplied to the passage 3 is freely supplied to the gas container through the notch groove 25, the gap m, the notch 2f, and the inner hole 24, without causing any hindrance to the gas flow.

Although the above embodiment has been described as an LP gas container valve, it is of course applicable to other high pressure containers such as a high pressure oxygen container.

Since this invention has the above configuration, it has the following advantages.

(1) A valve seat is provided in the gas passage inside the valve body, and a ball that can fit tightly against the valve seat is installed inside the gas passage, and the ball is floated by the flow pressure of the gas and brought into close contact with the valve seat. A high sealing effect is obtained due to the close contact between the ball and the valve seat, and there is no gas leakage even if the gas pressure in the gas container is low.

(2) When filling with gas, the ball is Bohr'! - Although the ball is pressed against the catch, the ball does not obstruct the flow of gas, so even if the ball is installed in the gas passage, there is no drawback that the gas filling time becomes longer.

Therefore, the workability of gas filling is superior to that of the conventional example.

(3) When the gas pressure in the gas container becomes abnormally high and the safety valve is activated, causing gas to be released from the gas passage into the atmosphere through the gas outlet, the ball should be placed in a position that blocks the flow of gas. Moreover, since the notched groove of the ball seat faces the gas outlet, the gas is smoothly discharged from the gas passage to the atmosphere through the gas outlet, ensuring a specified amount of gas to be blown out.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of this invention, FIG. 2 is a perspective view of a ball receiver, and FIG. 3 is a sectional view of a conventional example. (Explanation of symbols of main parts), 1... Valve body, 3... Gas passage, 6... Valve port, 7
...Valve chamber, 9...Opening/closing valve, 11...
...Ball, 22...Ball catch, 23...
- Cylindrical part, 24... Inner hole, 25... Notch groove, 27... Notch opening.

Claims (1)

[Claims for Utility Model Registration] A valve port 6 is provided in the gas passage 3 in the valve body 1, a valve chamber 7 communicating with a gas filling port 15 is provided above the valve port 6, and a pin 10 is provided protruding from the bottom surface. An on-off valve 9 is installed in the valve chamber 7 so that the valve port 6 can be opened and closed, and a ball 11 is provided below the valve port 6, which is large enough to allow the valve port 6 to be opened and closed, and which floats due to the flow pressure of the gas. In a container valve in which a gas outlet 16 is provided below the valve port 6 toward the side, and the gas outlet 16 is elastically closed with a safety valve 19, the container valve has a smaller diameter than the ball 11 and extends in the axial direction. Penetrating inner hole 24
The cylindrical portion 23 is formed to have a diameter smaller than that of the gas passage 3, and the upper end of the cylindrical portion 23 has a notched groove 2 that opens laterally.
5, a notch 27 communicating with the inner hole 24 is provided on the circumferential surface of the central portion of the cylindrical portion 23, a ball seat 22 is formed with a male threaded portion 26 on the lower outer periphery of the cylindrical portion 23, and the ball The catch seat 22 is screwed onto the gas passage 3 to hold the ball 11 slightly above the gas outlet 16, and the notch groove 25
An LP gas container valve that faces the gas outlet 16.