JPH0237511B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention prevents a large amount of gas from flowing out when a gas container, such as an LP gas container, falls over due to a large-scale earthquake or falling snow, or when piping or attached equipment breaks. This relates to a gas container valve equipped with a device to prevent secondary disasters.

[Prior art and its problems] Currently, this type of gas container valve is being actively developed, but none has passed the test and has not yet entered the stage of practical use.

[Purpose of the invention]

The present invention aims to provide a gas container valve with a gas release prevention device that has a simple structure, can be manufactured at low cost, and has excellent performance.

[Structure of the invention]

The present invention provides an elevating tube with a top plate having a center hole in the gas container attachment side passage of the valve seat, and a valve body is provided on the top plate via a support, and a reset protrusion is provided on the top surface of the valve body. A rod is provided, a guide rod is provided on the lower surface that passes through the center hole of the top plate, an elevating plate smaller than the center hole of the top plate is provided on the guide rod so as to be able to rise and fall freely, and the elevating plate is provided above and below the guide rod. A coil spring is used to hold the elevating tube in the position of the top board and press the elevating tube downward; A gas container valve with a gas release prevention device comprising: an auxiliary tube consisting of a stepped portion, a ball relief portion, and a ball stop portion that fit loosely into the auxiliary tube; and a locking fitting for preventing the auxiliary tube and the elevating tube from popping out. be.

[Examples] Examples of the present invention will be described below based on the drawings.

Fig. 1 shows an example of the application of the present invention to a gas container valve with a safety valve, in which 1 is a handle for raising and lowering the upper valve body 2, 3 is a valve seat, 4 is a safety valve, and 5 is a gas container attachment. Section 6 is a gas filling and gas discharge port.

Reference numeral 7 denotes an elevating cylinder which is provided in the gas passage 8 on the gas container mounting side of the valve seat 3 so as to be able to rise and fall freely, and has a center hole 10 in the top plate 9.
A lower valve body 12 is provided on the upper part of the top plate 9 via a support 11 to close the lower side 3b of the valve seat 3, and an appropriate number of through holes 13 are provided in the lower part.

A reset protrusion 12a is provided at the center of the upper surface of the lower valve body 12, and the top plate 9 is provided at the center of the lower surface.
A guide rod 1 consisting of a long screw passing through the center hole 10 of
4 is attached to the guide rod 14, and an elevating plate 15 having a smaller diameter than the center hole 10 of the top plate is attached to the guide rod 14 so as to be able to move up and down. Approximate top plate 9
The top plate 9 is held at this position, and the position of the top plate 9 is changed depending on the screw-in amount of the guide rod 14, which is a long screw, to set a specified flow rate.

Reference numeral 18 denotes a base portion 18a that fits loosely into the lower enlarged portion 8a of the gas passage 8, and a stepped portion 18b that fits loosely into the elevating cylinder 7.
This is an auxiliary cylinder composed of a ball relief part 18c and a ball stopper part 18d, and is stopped by a washer 19 and a snap stopper 19 so as not to fall off.

Reference numeral 21 denotes a through hole 1 provided at the lower part of the elevator tube 7.
3 is a temporary fixing ball that is loosely fitted into the elevator tube 7, and its outer diameter is made to be approximately twice the wall thickness of the elevator tube 7, and the space between A and the elevator tube 7 is formed between the lower enlarged part 8a of the gas passage and the elevator tube 7. 7 and the ball relief portion 18c of the auxiliary cylinder 18 is formed at half the outer diameter of the temporarily fixed ball 21.

The elevating cylinder 7 and the auxiliary cylinder 18 are pressed against the washer 19 by a coil spring 22 in a steady state.

Next, I will explain how to use it and how it works.
In the gas container valve according to the present invention, the gas container mounting part 5 is screwed onto the gas container, and the gas filling device or gas appliance is connected to the gas filling/gas discharge port 6, and the handle 1 is operated. By opening and closing the upper valve body 2, gas can be filled or used.

In that case, the gas flow is as follows: gas filling device → gas filling/discharging port 6 → valve seat 3 → window formed between pillar 11 → center hole 10
The gas flows between the and the lifting plate 15 → to the gas passage 8, and when gas is used, it flows in the opposite direction.

Note that during regular use, the elevating tube 7 and the auxiliary tube 18 are kept pressed downward by the coil spring 22, and the elevating plate 15 is held almost parallel to the top plate 9 by the upper and lower coil springs 16, 17. However, during filling, the elevating plate 15 is pushed to the imaginary line position, expanding the cross-sectional area of the gas passage hole, and quickly filling the gas.

However, in the event of an abnormality such as a sudden increase in gas pressure in the gas container due to a disconnection of the gas pipe, a failure of gas appliances, or a rise in temperature, the pressure difference between the upper and lower sides of the valve seat 3 suddenly increases, so 15 is pushed up, and then the lifting tube 7 is pushed up against the coil spring 22 by the gas pressure, and the lower valve body 12 closes the lower surface of the valve seat 3 as shown in FIG. Prevent the release of gas from.

(Automatic lock) If the gas pressure exceeds the safety standard of 31Kg/cm ² , it will be released from the safety valve 4.

In this case, the auxiliary cylinder 18 does not rise, and only the elevating cylinder rises.

After removing the cause of this abnormal situation, the operator operates the handle 1 and pushes down the upper valve body 2 to reset the elevator cylinder.

In this way, the protruding rod 12 provided on the lower valve body 12
The lower valve body 12 is pushed down through the valve seat 3, and the gas flows out through the valve seat 3, reducing the gas pressure on the side connected to the gas container.
2 to the steady state position.

By the way, in cold regions such as Hokkaido, in the winter, gas containers are turned upside down to recover residual gas in order to replace cheap butane-laced gas with pure propane gas that does not freeze.

In this case, in the gas container valve according to the present invention, when the valve is reversed, the lower enlarged portion 8a is stepped while the elevating tube 7, the auxiliary tube 18, and the temporary ball 21 are kept in the state shown in FIG. The elevating plate 15 is pushed down to the imaginary line position by the residual gas pressure, expanding the cross-sectional area of the gas passage hole, and recovering the residual gas quickly. In addition, even if the upper valve body 2 is opened by operating the handle 1 in order to recover the residual gas, the residual gas can be discharged without any problem without descending any further.

〔Effect of the invention〕

As described above, according to the present invention, there is a function to prevent a large amount of gas from leaking due to damage to piping and attached equipment, and to prevent secondary disasters, and residual gas can be recovered without any problems and can be carried out as before. As can be easily seen from the examples, this invention is a practically useful invention as it can be easily applied to conventionally known valves.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention.
The figure is a partially cutaway side view during normal operation, FIG. 2 is a partially cutaway side view during abnormal conditions, and FIG. 3 is a partially cutaway side view during residual gas recovery. 1...Handle, 2...Upper valve body, 3...Valve seat, 4...Safety valve, 5...Gas container mounting part, 6...
...Gas filling and gas discharge port, 7...Elevating cylinder, 8...
... Gas passage, 9 ... Top plate, 10 ... Center hole, 11
...Strut, 12...Lower valve body, 13...Through hole, 1
4... Guide rod, 15... Elevating plate, 16, 17... and 22... Coil spring, 18... Auxiliary tube,
19... Washer, 20... Stop fitting, 2
1...Temporary ball.

Claims (1)

[Claims] 1. An elevating tube with a top plate having a center hole is provided in the gas container attachment side passage of the valve seat, and a valve body is provided on the top plate via a support, and a reset protrusion is provided on the top surface of the valve body. Further, a guide rod is provided on the lower surface to pass through the center hole of the top plate, and an elevating plate smaller than the center hole of the top plate is provided on the guide rod so as to be able to rise and fall freely, and the elevating plate is provided above and below the coil. a coil spring that holds the elevator tube at a position substantially at the top plate by a spring and presses the elevator tube downward; a base that fits loosely into the enlarged lower part of the gas container installation side passage; and a base portion that fits loosely into the elevator tube. A gas container valve with a gas release prevention device, characterized in that an auxiliary cylinder is formed of a stepped part, a ball relief part, and a ball stop part, and a locking fitting for preventing the auxiliary cylinder and the elevating cylinder from popping out. .