JPS61124782A - Gas container valve with gas discharge preventive device - Google Patents

Abstract

PURPOSE:To prevent a large quantity of gas discharge by providing a flexible control disk controlling the gas passage to a lifter having an auxiliary valve placed opposite to a main valve. CONSTITUTION:An auxiliary valve 9 is provided at the upper end of a lifter 7 which is fitted to be freely lifted on a support cylinder 8 installed inside a gas inlet port 4, and below the valve a flexible control disk 10 which restricts the gas passage and gives buoyancy due to gas flow to the fifter 7 is provided. The charge of gas or use of gas is carried out by connecting a charger or gas apparatus to a gas exhaust port 5, and operating a main valve 2 to open or shut by means of a handle 1. If any abnormality such as the sudden rise in the gas pressure inside the gas container occurs, the pressure difference between the upper and the lower parts of valve port rises suddenly, and consequently the auxiliary valve 9 closes the valve port to prevent the gas discharge from the gas exhaust port 5.

Description

[Detailed description of the invention] [Industrial application field] The present invention is designed to prevent gas containers from being damaged due to large-scale earthquakes, lightning strikes, etc.

For example, the present invention relates to a gas container valve equipped with a device that prevents a secondary disaster by preventing a large amount of gas from flowing out when an LP gas container falls over, or when piping or attached equipment breaks.

[Problem that the invention seeks to solve]

Currently, this type of gas container valve is being actively developed, but it has not yet reached the stage of practical use.

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

[Structure of the invention]

[Invention 1 is a known gas container valve in which a valve seat is provided between a gas inlet and a gas outlet, and a main valve is provided on the gas outlet side. An elevating body equipped with a valve is provided so as to be movable up and down, a flexible regulation plate is provided to regulate the gas passage through the elevating body, and a coil spring is provided to maintain the elevating body in a normally open state.
A locking device is provided to prevent the elevating body from falling when it is inverted, and in the event that the gas container falls over or the piping or attached equipment is damaged, the auxiliary valve will automatically operate to close the valve port and prevent large amounts of gas from flowing out. In addition to preventing leakage and preventing secondary disasters, the auxiliary valve is not activated when recovering residual gas, so that residual gas can be recovered.

In addition, as an extension of the second invention, a swing-type elevating body lifting device is provided so that when the container is tilted or an earthquake occurs, the auxiliary valve is automatically activated to prevent the occurrence of secondary disasters. . Embodiments of the present invention will be described below based on the drawings.

[Embodiment 1] Fig. 1 shows an example of the application of the present invention to a gas container valve with a safety valve, where 1 is a handle for raising and lowering the main valve 2t, 3 is a gas inlet 4 and a gas exhaust port. 5 is a valve seat provided between them, and 6 is a safety valve provided on the gas inlet 4 side.

Reference numeral 7 is an elevating body which is installed in the gas inlet 4 and is mounted on the support tube 8 so as to be able to rise and fall freely, and an auxiliary valve 9t is provided at the upper end to close the lower three parts of the valve seat 3.

A flexible regulating plate 10 is provided below it to regulate the gas passage and provide buoyancy to the elevating body 7 due to gas flow. There is.

12 is a locking device installed at the bottom of the support tube 8.

When inverted, the locking gel 13 falls into the gap formed by the support tube 8 and the recess 71 of the elevating body 7 and locks the elevating body 7.

14 is a reset protrusion provided on the main valve 2, and can also be attached to the auxiliary valve 9 side.

FIG. 2 is an enlarged plan view of the flexible regulation board 10, which is made of @-t, fm and has eight radial notches to form eight blades IQm. It is.

Next, we will explain its usage and operation.The gas container valve of the present invention is similar to conventional products in that the gas container mounting part 15 is screwed onto the gas container, and the gas outlet 5 is connected to the filling device or gas appliance. By connecting the main valve 2 and opening/closing the main valve 2 by operating the handle 1, the main valve 2 can be filled with gas or used.

At that point, the gas flow is as indicated by the dotted arrow (when gas is filled) or the solid arrow (when gas is used) in FIG. 1.

Note that when gas is filled, each blade of the flexible regulation board 10 is bent as shown by dotted lines due to gas pressure.

It hardly bends during regular use. During regular use, the flexible regulation panel 10 may be subjected to gas pressure and the blades 10m may bend to some extent, but the elevating body 7 rises against the spring 11 and the auxiliary valve 9 closes the valve port. As shown in the figure, the strength of the coil spring t1 is selected.

However, in the event of an abnormality such as a sudden increase in the gas pressure in the gas container due to a disconnection of the gas pipe, a malfunction of gas appliances, or a rise in temperature, the pressure difference between the upper and lower sides of the valve opening will suddenly increase. 7 receives buoyancy and is pushed up against the coil spring 11, as shown in FIG.

The auxiliary valve 9 is in close contact with the lower side 3 of the valve seat 3, closes the valve port, and prevents gas from being released from the discharge port 5.

After the auxiliary valve 9 closes the valve port, the gas pressure reaches the safety standard level 31.
In the above case, gas is released from the safety valve 6.

After removing the cause of this abnormal situation, in order to reset the elevating body 7, it is sufficient to operate the handle 1 to lower the main valve 2t.

That is, when the main valve 2 is lowered, the reset rod 14 provided on it pushes the auxiliary valve 9, and the valve opening is opened, so that gas flows out and the gas pressure on the side connected to the gas container and the gas pressure on the side connected to the gas appliance are changed. Since the differential pressure becomes smaller, the elevating body 7 is lowered by the coil spring IIK to the steady state position shown in FIG.

By the way, in cold regions such as Hokkaido, during the winter season, the remaining gas is recovered by submerging the cheap butane-laced gas with non-freezing pure proton gas and turning the gas container upside down.

In this case, in the gas container valve according to the present invention,
When reversed as shown in Figure 4.

This is because the locking gel 13 falls into the gap formed by the support tube 8 and the lifting body fa to lock the lifting body 7.

When recovering residual gas, even if you operate the handle 1 and open the auxiliary valve 9, it will not drop any further, so the residual gas can be discharged without any problem (
collection) will be carried out.

[Example 2] FIG. 5 shows a different embodiment of the invention.

The difference from the embodiment shown in FIG. The auxiliary valve was designed to operate automatically in the event of a tilting of the gas container or an earthquake.

That is, in this embodiment, a cylindrical elevating body 16 is provided in the gas inlet 4 to raise and lower, an auxiliary valve 9 is provided on the upper part of the elevating body 16, and eight cutouts are provided inside as shown in FIG. A flexible regulation plate 17 made of a synthetic bim having 8 blades 17m formed with indentations is provided on the lower side 3 of the valve seat 3! A spring 18 is provided between the stepped portion 16 provided on the outer periphery of the flexible regulation plate 17, and normally presses the elevating body 16 downward.
A locking device consisting of a locking seal 19 and a locking tube 20 is provided at the lower W6 of the gas inlet 4, and a Kl weight 21 is attached to the lower part of the gas inlet 4, and a nine-swing type lifting body lifting piece 22 is installed. I'll go.

The weight 21 is attached to an elevating body pushing piece 22 and is slidably attached to nine hanging rods 23.

Its usage and operation are 11i1! This is the same as the embodiment shown in IK.

That is, in the same way as the nine shown in FIG. By opening and closing, it can be filled with gas or used for gas.

At that time, the gas flow is as shown in FIG. 5 by the dotted line arrow (when gas is filled) or the solid line arrow (when gas is used).

In addition, during regular use, the blades 10m of the flexible regulation board 10 may bend slightly due to gas pressure, but the elevating body 16 rises against the coil spring 18 and the auxiliary valve 9 closes the valve opening. The strength of the coil spring 18 is chosen so that it does not close.

However, in the event of an abnormality such as a sudden increase in gas pressure within the gas container due to a disconnection of the gas pipe, failure of a gas appliance, or rise in temperature, the pressure difference between the upper and lower sides of the valve opening will suddenly increase.
The elevating body 16 receives buoyancy due to the gas pressure and is pushed up against the coil spring 18, as shown in FIG.

The auxiliary valve 9 is in close contact with the lower flIJ3m of the valve seat 3, closes the valve port, and prevents gas from being released from the discharge port 5.

In this embodiment, after the auxiliary valve 9 closes the valve port, if the gas pressure is equal to or higher than the safety standard of 31 mm, the gas is released from the safety valve 6. After removing the cause of this abnormal situation, to reset the elevating body 16, operate the handle 1 to lower the main valve 2 as in the embodiment shown in Figure @1, and then use the reset rod 14 to reset the elevating body 16. Auxiliary valve 9f: Just push down and open the valve port.

That is, when the auxiliary valve 9 opens, the differential pressure between the gas pressure on the side connected to the gas container and the gas pressure on the side connected to the gas appliance becomes smaller, so the elevating body 16 is moved to the steady state position shown in the fifth column by the coil spring 18. return.

In this embodiment, the automatic closing of the auxiliary valve 9 described above is as follows:
This also occurs when a gas container is tilted at a certain angle or more due to an earthquake or the like.

In other words, if the gas container is tilted at a certain angle or more.

As shown in FIG. 8, the swinging lifting member 16 is tilted by the weight 21 with respect to the gas container valve body, and the lifting member 16 is pushed up against the coil spring 18. is closed by the auxiliary valve 9.

Nine embodiments of the valve are shown in FIG.

The auxiliary valve 9 automatically closes when the gas container topples, such as when an earthquake occurs, as well as when piping and accessories break down.

Further, the remaining gas is recovered by inverting the gas container in the same manner as in the embodiment shown in FIG.

That is, f! When the gas container valve t is reversed as shown in FIG. 9, the locking tube 20 descends and the elevating body 16 is lifted up and down via the locking seal 19.In order to recover the remaining gas, operate the handle 1. Even if the auxiliary valve 9 is opened, the remaining gas is discharged (recovered) without any problem because it does not fall any further.

[Effect of the invention] “As described above, 1
According to the present invention, there is a function to prevent a large amount of gas from leaking out in the event of damage to piping and attached equipment or an earthquake occurs, and to prevent secondary disasters.Remaining gas can be recovered without any problems as before, and from the embodiment This is combined with the fact that it can be easily applied to conventionally known valves as can be easily seen.

This is a practically useful invention.

[Brief explanation of drawings]

Fig. 1 is a partially cut-away side view of an embodiment of the present invention in normal operation; Fig. 2 is an enlarged plan view of the flexible regulating plate; The fourth factor is a partially cut-away side view showing the state during residual gas recovery, FIG. 5 is a partially cut-away side view of a different embodiment of the present invention in steady state, and FIG. 6 is an enlarged plan view of the flexible regulation board. , Fig. 7 is a partially cut-away side view showing the state when automatically closing, Fig. 8 is a partially cut-away side view showing the state when the gas container is tilted, and Fig. M9 is a partially cut-away side view showing the state when residual gas is recovered. FIG. 1... Handle 2... Main valve 3... Valve seat
-4...Gas inlet 5...Gas exhaust 1 port 6...Safety valve 7...Elevating body 8...Support tube 9...Auxiliary valve
10... Flexibility regulation board 11... Coil spring 1
2... Locking device 13... Locking ball 14...
Reset protrusion 15...Gas container mounting part No. 4 Figure 7Q! Figure 2 Figure 6 + 8) Figure 8 Figure 9

Claims (2)

[Claims] (1) A gas container valve in which a valve seat is provided between a gas inlet and a gas outlet, and a main valve is provided on the gas outlet side, and an auxiliary valve facing the main valve is provided on the gas inlet side. An elevating body is provided so that it can be raised and lowered, a flexible regulating plate is provided on the elevating body to regulate the gas passage, and a coil spring is provided to maintain the elevating body in a normally open state, and the elevating body is prevented from falling when it is inverted. A gas container valve with a gas release prevention device, characterized in that it is provided with a locking device that prevents the release of gas. (2) A gas container valve in which a valve seat is provided between a gas inlet and a gas outlet, and a main valve is provided on the gas outlet side, and an auxiliary valve facing the main valve is provided on the gas inlet side. An elevating body is provided so that it can be raised and lowered, a flexible regulating plate is provided on the elevating body to regulate the gas passage, and a coil spring is provided to maintain the elevating body in a normally open state, and the elevating body is prevented from falling when it is inverted. A gas container valve equipped with a gas release prevention device, characterized in that it is equipped with a locking device for locking and a swinging lifting device.