JPS587879B2 - LP gas container valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) The present invention relates to a container valve used for an LP gas container. Some of them may open momentarily while the valve is being opened (the rubber hose that connects the regulator and the gas piping line, the high pressure hose of the high pressure hose assembly, or the rubber hose that connects the gas piping and gas appliances may come off, or there may be holes in these hoses). If a large amount of raw gas starts to spout out due to a break in the valve (this could be caused by a break or a disconnection), immediately shut off the gas passage inside the valve to prevent the raw gas from spewing out, and prevent the dangerous raw gas from spewing out. The purpose is to prevent accidents.

(Prior Art) The container valve conventionally installed in an LP gas container is equipped with a safety valve that operates when the gas pressure inside the container becomes abnormally high. It is activated when a part of the gas piping line connected to the container valve B attached to the LP gas container A via the regulator C or the high pressure hose assembly -D is momentarily opened for some reason. There was no safety valve installed to prevent raw gas from spewing out, and there was a risk of a dangerous accident occurring due to raw gas spewing out.

(Structure of the Invention) The present invention provides a valve port and a ball that can close the valve port in the gas passage in the valve body, and when a part of the gas piping passage is opened and raw gas flows vigorously through the gas passage. The ball floats up due to the flow pressure of the gas and closes the valve port, thereby blocking the gas passage.Examples will be described below.

In FIG. 1, a valve body 1 is provided with a connecting portion 3 to a gas container 2 at its lower portion, and a gas passage 4 provided at its axial center.

A pair of downward-facing valve seats 5 and upward-facing valve seats 6 are provided in the center of the gas passage 4 with a valve port 7 in between.

A valve chamber 8 whose axis is aligned with the valve port 7 is provided in the upper part of the valve body 1, and an on-off valve 10, which is kept airtight by attaching an O-ring 9 to the valve chamber 8, is slidable vertically. It's decorated.

The on-off valve 10 closes the valve seat 6 and closes the valve port 7, and the center of the lower surface of the on-off valve 10 has a required length (in the closed state, it contacts a ball 19 described later to open the valve port 7). A pin 11 of the desired length is provided in a protruding manner.

A valve stem 12 is connected to the upper surface of the on-off valve 10.
2 is rotatably screwed into a gland nut 13 screwed onto the upper end of the valve body 1.

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

A filling port 15 communicating with the valve chamber 8 is formed on the upper side of the valve body 1, to which a regulator C or a high pressure hose assembly D can be connected as shown in FIG. 2 or 3.

Furthermore, a safety valve chamber 17 is provided on the side surface of the central portion of the valve body 1 and communicates with the gas passage 4 through a blowout port 16 on the side opposite to the filling port 15.
is provided.

A pin hole 18 is provided protrudingly on the inner peripheral surface of the gas passage 4 on the side opposite to the outlet 16, and after a lightweight ball 19 is accommodated in the gas passage 4, a pin 20 is inserted into the pin hole 18, and the ball 19 is inserted into the pin hole 18.
prevents it from falling off.

As is clear from Fig. 1, the pin 20 is attached to the lowered pole 1.
9 to prevent the gas outlet 16 from being blocked by the ball 19.
The axial center of the gas outlet 16 is located slightly above the axial center of the gas outlet 16.

Therefore, regardless of the position of the ball 19, the safety valve 22 is ensured to operate when the gas pressure within the gas container 2 becomes abnormally high.

A safety valve 22 is installed in the safety valve chamber 17 and is in close contact with a valve seat 21 of the outlet 16, and the safety valve 22 is pressed against the valve seat 21 by a compression spring 23.

24 is a cap serving as a spring presser, and 25 is liquefied gas.

(Function of the Invention) To explain the function of the present invention, the filling port 15 is put into use by connecting a gas piping line through the regulator C or the high pressure hose assembly -D, and the filling port 15 is put into use in the closed state shown in FIG. In this case, the on-off valve 10 is in close contact with the valve seat 6 and closes the valve port 7, and the ball 19 descends due to its own weight, and the pin 2
0 prevents it from falling off.

When the on-off valve 10 is pulled up by turning the handle 14 from the closed state shown in FIG.
It is supplied to the gas pipe line through the valve port 7.

At this time, the ball 19 either descends and is on the pin 20 as in the closed state, or it floats due to the pressure of the gas to such an extent that it does not come into close contact with the valve seat 5.

Since the ball 19 located on the pin 20 or floating to such an extent that it does not come into close contact with the valve seat 5 is located slightly above the gas outlet 16, it does not block the gas outlet 16.

If a part of the gas piping path is suddenly opened in the above-mentioned closed state, the flow resistance in the gas piping path decreases rapidly, so that the gas in the gas cylinder 2 suddenly passes through the gas path 4 and enters the gas piping path. Trying to squirt.

At this time, the ball 19 is pushed upward by the fluid pressure of the gas jet and comes into close contact with the valve seat 5.

When the ball 19 comes into close contact with the valve seat 5, the valve port γ is closed, and the gas jetting immediately stops.

The on-off valve 1 is closed with the ball 19 in close contact with the valve seat 5.
0 is lowered, the pin 1 protruding from the bottom surface of the on-off valve 10
1 comes into contact with the ball 19 and pushes the ball 19 down as the on-off valve 10 descends, thereby breaking the close contact between the ball 19 and the valve seat 5 and allowing normal use.

The safety valve 22 always closes the outlet 16 when the pressure inside the gas container 2 is normal, and operates to open the outlet 16 only when the pressure inside the gas container 2 becomes abnormally high. The pressure inside the gas container 2 is reduced.

(Effect of the invention) The present invention provides a ball in the gas passage in the valve body,
Since the gas passage can be shut off, even if a part of the gas piping path is suddenly opened, a large amount of raw gas will not be spewed out, and dangerous accidents caused by spouting of raw gas can be prevented.

Furthermore, since the ball that is in close contact with the valve seat is immediately released from close contact when the valve is closed, gas can be used as soon as the gas piping is restored to normal, making the valve highly user-friendly.

Since the ball is provided in the gas passage slightly above the gas outlet that communicates the gas passage and the safety valve chamber, there is no risk that the ball will block the gas outlet.

Therefore, the safety valve operates reliably in any case.

Furthermore, since the present invention has a very simple structure, it is easy to manufacture, has high productivity, and can be provided to consumers at low cost.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, showing the closed state;
FIGS. 2 and 3 are plan views showing the state of connection with gas piping. Explanation of symbols of main parts, 1...Valve body,
4...Gas passage, 5...Valve seat, 7...
...Valve port, 10...Opening/closing valve, 11...
...Pin, 16...Gas outlet, 17...
...Safety valve room, 19...Ball.

Claims (1)

[Claims] I A valve port is provided in the gas passage in the valve body leading to the LP gas container, and the valve port is provided so that it can be opened and closed with an on-off valve provided above the valve port, and communicated through a gas outlet on the side of the gas passage. In an LP gas container valve, in which a safety valve is provided in the safety valve chamber and a safety valve is installed inside the safety valve chamber, a sudden drop of a size that can close the valve opening is located below the valve opening in the gas passage and slightly above the gas outlet. It houses a lightweight ball that floats up when subjected to gas flow pressure, and has a length on the underside of the on-off valve that can come into contact with the ball and eliminate the close contact between the ball and the valve port when the valve port is closed by the on-off valve. An LP gas container valve characterized by a protruding pin.