JPH01250699A - Accident prevention cap - Google Patents

Abstract

PURPOSE:To find leakage of gas by providing an accident prevention cap comprising a bag-like mounting member which has an opening portion made come closely into contact with the upper outer surface of a bomb and is formed by material having flexibility. CONSTITUTION:An accident prevention cap comprises a bag-like mounting member which has an opening portion made come closely into contact with the upper outer surface of a bomb 5 and is formed by material having flexibility. The accident prevention cap is installed in such a manner as to cover the upper portion of the bomb 5, and the opening portion is airtightly made come closely into contact with the outer surface of the bomb 5 and fixed thereto. When gas leaks from the bomb 5, the mounting member 10 is expanded. Thus, leakage of gas can be found by visually confirming such deformation.

Description

Detailed Description of the Invention "Industrial Application Field" This invention is intended to prevent gas from leaking when a gas leak occurs from a high-pressure gas container filled with a dangerous gas, such as a toxic or flammable gas. Regarding a disaster prevention cap that can ensure safety by preventing leakage into the environment.

``Prior art and problems to be solved by the invention'' Many toxic and flammable dangerous gases are used in semiconductor manufacturing and other processes. When supplying such dangerous gas to customers, high-pressure gas containers (hereinafter abbreviated as cylinders) are generally used.

However, in rare cases, gas may leak from the container valve or the installation of the container valve.

Conventionally, such gas leak accidents have been detected using detection sensors installed near the container.

However, even if a gas leak accident is detected by such means, the atmosphere will already be heavily contaminated by the leaked gas by the time it is discovered, so handling the accident is quite dangerous.
There was a problem that required time.

In addition, conventionally, when a gas leak accident like this occurs, a containment case like the one shown in Figure 17 is used! , the cylinder 5 is carried to the installation location of a detoxification treatment device consisting of a detoxification chamber 2, an exhaust pump 3, an exhaust duct 4, etc., and the cylinder 5 is housed in the storage case l to detoxify the leaking gas. , and released it into the environment.

However, such a detoxification treatment device is large-sized and can only be installed in a limited number of places, so there is a problem in that it is not possible to quickly take measures against gas leakage accidents.

Therefore, in case of an emergency, as shown in FIG. The leaking gas is weighed inside the tank to temporarily prevent it from leaking into the environment.

After that, abatement room 2, exhaust pump 3, exhaust duct 4
The cylinder 5 was transported to a detoxification device equipped with a gas cylinder, etc., and the disaster prevention cap 8 was connected to the detoxification device to detoxify the leaking gas and release it into the environment.

However, even when this disaster prevention cap 8 is used, the leaked gas cannot be treated unless the cylinder 5 is carried to the installation location of the detoxification treatment device, which is a complaint that the response to the gas leak tends to be delayed. there were.

Moreover, if the cylinder 5 is equipped with a cylinder cap that protects the container valve 6, the cylinder cap must be removed before the disaster prevention cap 8 is attached, which also tends to delay responses to gas leaks. there were.

``Means for Solving the Problems'' The disaster prevention cap according to claim I comprises a bag-shaped mounting member formed of a flexible material and has an opening that closely contacts the upper outer surface of the cylinder.

The mounting member forming the disaster prevention cap is desirably made of rubber with low gas permeability, such as natural rubber, butyl rubber, or chloroprene rubber.

These materials are also preferable because they have extensibility.

For reasons described later, it is effective to attach a detection agent that changes color when reacting with leaked gas to the attachment member.

Furthermore, if the mounting member is provided with a pierceable portion into which a hollow needle can be inserted and which closes when the inserted hollow needle is pulled out, it is effective to perform various treatments as described later.

Further, a connecting pipe can be connected to the mounting member.

In this case, it is advisable to provide a valve in the connecting pipe. Furthermore, if the connecting tube is branched into multiple branches, it can be used for various treatments.

Furthermore, if a balloon formed to be more easily inflated than the mounting member is connected to the mounting member, the leaked gas can be collected by this balloon. The balloon may be manufactured separately from the mounting member, but it can also be formed integrally with the mounting member.

This balloon can be made of tetrabubble or a plastic bag, but it is preferably made of rubber with low gas permeability. Specific examples include the same rubbers as those mentioned as suitable for forming the mounting member.

In addition, it is preferable that the balloon or attachment member contain a chemical to treat leaked gas.

"Function" The disaster prevention cap according to claim 1 is used by being attached to cover the top of a cylinder. The opening is hermetically sealed to the outer surface of the container. When gas leaks from the cylinder, the bag-shaped mounting member made of a flexible material expands, and gas leaks can be discovered by visually detecting this deformation.

In the case of a disaster prevention cap in which a detecting agent that changes color when reacting with leaked gas is attached to the mounting member, if a gas leak occurs, the detecting agent changes color and can be easily detected.

In the case of a disaster prevention cap in which a perforable portion is formed in the mounting member, gas leakage can be inspected by inserting a sensor probe (hollow needle) into the perforable portion. It is also possible to treat leaked gas by inserting a processing conduit of a gas processing device formed into a hollow needle shape into the cap from the perforable portion. Furthermore, a predetermined gas atmosphere can be created inside the cap by inserting a hollow needle into the perforable portion and blowing a predetermined gas into the cap.

Furthermore, for disaster prevention caps that have a connecting pipe connected to the mounting member, a detection tube containing a detection agent can be attached to the connecting pipe to detect gas leakage, or a balloon can be attached to the connecting pipe to detect leakage gas. can be collected.

By branching this connecting pipe into multiple directions, leaked gas can be collected while sequentially replacing the balloons attached to the branch pipes. Further, the detection tube and the balloon can be attached to the mounting member at the same time. 'In a disaster prevention cap in which a balloon is connected to a mounting member, the balloon is formed to be inflated more easily than the mounting member, so that the pressure inside the disaster prevention cap is prevented from increasing due to the expansion of the balloon.

As a result, the internal pressure applied to the mounting member is alleviated, and deterioration of the close contact between the opening of the mounting member and the outer surface of the cylinder is prevented.

If this disaster prevention cap contains a chemical for treating leaked gas, the leaked gas will be immediately rendered harmless, thereby increasing safety.

Normally, the disaster prevention cap of the present invention is used by being attached to a cylinder in advance, but it can also be used to deal with an accident after a gas leak occurs from a cylinder valve or the like.

If gas leaks from a cylinder that is not equipped with a disaster prevention cap, first place the mounting member over the area where the gas leak has occurred, and then fix the opening of the mounting member airtightly to the outer surface of the upper part of the cylinder. The leaked gas is then temporarily contained within the cap and is prevented from escaping into the environment, allowing the user to safely wait for the arrival of accident handling experts.

"Example" Hereinafter, the disaster prevention cap of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 shows an embodiment of the present invention, and reference numeral I in the figure shows an embodiment of the present invention.
O is a mounting member, and numeral 11 is a balloon.

The attachment member IO and the balloon 11 are connected to the connecting tube 1.
Connected by 2.

The mounting member 10 is a bag-shaped member having an opening that opens outward, and in this example, it is formed into a cylindrical shape whose lower end is wide open to the outside and whose upper end is gradually reduced in diameter to form a thin tube shape. . The mounting member 10 is formed such that its lower end opening is tightly and tightly fixed to the outer peripheral surface of the neck ring 13 to which the container valve 6 of the cylinder 5 is attached by means of a fixing fitting 14.

The mounting member IO is made of a flexible material with low gas permeability, such as natural rubber, butyl rubber, chloroprene rubber, etc. These materials are also suitable for use because they have extensibility.

The balloon 11 is formed to have greater extensibility than the mounting member 10. The balloon 1.1 is desirably formed of a rubber having a low gas permeability, for example, the same rubber as exemplified as a suitable material for the mounting member IO. This balloon 1
1 is made of the same material as the mounting member 10, the balloon 11 is made thinner so that it can be easily expanded.

Inside this balloon 11, an abatement agent for treating leaked gas is applied or injected in order to reduce the risk of leaking gas.

The opening on the side of the artificial neck 11a of these balloons 11 and the opening on the upper end side of the mounting member 10 are respectively attached to metal fittings 18.
The balloon 11 is air-tightly fixed to the connecting tube 12 using a tube 18, thereby communicating the mounting member 10 and the balloon 11.

Next, a method of using this disaster prevention gap will be explained assuming that an accident is handled when gas leaks from a cylinder 5 to which a disaster prevention cap is not attached.

When gas leaks from the container valve 6 of the cylinder 5, first place the mounting member 10 of this disaster prevention cap so as to cover the container valve 6 from the lower end opening side, extend the lower end and fit it into the neck ring 13, Then, fix it airtight with the fixing metal fittings I4.

Then, the leaked gas flows into the balloon 11 via the connecting pipe 12. A part (approximately 50 to 60%) of the leaked gas that has flowed into the balloon 11 at this time is rendered harmless by the abatement agent contained in the balloon ti.

After the collection of the leaked gas is completed, the balloon 11 is removed from the connecting pipe 2 after its inlet 1tta is sealed with a pinch cock or the like. After that, the leaked gas remaining in the balloon 11 can be removed by further injecting a detoxifying agent into the balloon 11, or
It is rendered harmless by using fixed abatement equipment.

With this disaster prevention cap, the leaking gas can be removed from the balloon 11.
Since the gas is collected in the balloon 11, it is possible to immediately prevent the leaked gas from flowing into the environment even in places where there is no abatement equipment.Furthermore, the leaked gas can be stored in the balloon 11, and the balloon 11 containing the leaked gas can be used later. It can be removed and subjected to processing.

Therefore, if this disaster prevention cap is used, there is no need to carry the cylinder 5 even if a gas leak occurs, and the leaked gas can be quickly disposed of even at a location away from the fixed type abatement device.

In addition, in this disaster prevention cap, the mounting member 10 is formed to be flexible and has an opening that opens outward, so that when a gas leak occurs, the mounting member 10 is configured to cover the gas leakage point. Since it is only necessary to cover the IO, when attaching the container valve of the cylinder 5, even if the cylinder cap 9 is attached to the portion 68, the mounting member 10 can be placed over it.

Therefore, according to this disaster prevention cap, the cylinder cap 9
This disaster prevention cap has the advantage of being able to quickly deal with gas leaks that occur from a cylinder with a gas cylinder attached.Furthermore, in this disaster prevention cap, since the attachment member 10 is formed to be flexible, the disaster prevention cap can be easily removed. It is possible to operate the container valve 6 and the like even when the device is attached to prevent leakage gas from flowing into the environment.

Therefore, by using this disaster prevention cap, you can perform simple repairs or retightening to stop gas leaks after taking measures to prevent leaking gas from flowing into the environment.

Furthermore, since this disaster prevention cap is composed of a flexible mounting member and an inflatable balloon, it is flexible and can be stored even in a folded state. Furthermore, they are small and light insects, have a simple structure, and are inexpensive to manufacture.

Therefore, this disaster prevention cap is suitable for transportation trucks, laboratories,
It can be deployed in any necessary location such as a storage room.

Also, since it is easy to use, even inexperienced people can use it.

Furthermore, since this disaster prevention cap has a flexible structure, it does not take up much space when used. Therefore, this disaster prevention cap can be used quickly even in narrow spaces, and gas leaks can be quickly dealt with.

Furthermore, this disaster prevention cap has the advantage of being able to collect a large amount of leaked gas because the balloon is formed to have extensibility.

In addition, in this disaster prevention cap, since the abatement agent is stored in the balloon 11 in advance, the risk of leaking gas can be immediately reduced when it flows into the balloon 11.

Therefore, this disaster prevention cap has high safety.

(Embodiment 2) FIG. 2 shows a second embodiment of the disaster prevention cap of the present invention.

The disaster prevention cap of this example differs from that of the first embodiment in that the mounting member 10 and the balloon 11 are connected via a check valve 15. The check valve 15c is installed to allow gas to flow from the mounting member 10 to the balloon 11 and to prevent gas from flowing from the balloon 11 to the mounting portion 4410.

Furthermore, the balloon 11 of the disaster prevention cap in this example does not contain any abatement agent.

In the disaster prevention cap of this embodiment, the backflow prevention valve I5
Since this valve I5 is removed from the mounting member 10, the balloon 11 can be removed safely and easily.

Further, in the disaster prevention cap of this example, since the balloon 11 does not contain a detoxifying agent, the leaked gas is collected as is in the balloon ti. Therefore, with the disaster prevention cap of this embodiment, it is possible to reuse the leaked gas collected by the balloon 11, which is economically advantageous.

(Embodiment 3) FIG. 3 shows a third embodiment of the disaster prevention cap of the present invention.

In the disaster prevention cap of this example, the mounting member 10 and the balloon 11 are connected via a harm remover 16 and a connecting pipe 12 that branches in three directions.

The abatement device 16 contains a chemical for reducing the risk of leaking gas, and is formed into a cylindrical shape or a rubber bag shape. The harm remover 16 is airtightly connected to the attachment part 10 by a metal fitting 18.

The connecting pipe 12 is branched into two directions, and one branch pipe is provided with a processing valve 19. Moreover, one branch pipe is airtightly connected to the above-mentioned detoxifier I6. Balloons 11 are attached to the remaining two branch pipes, one of which is temporarily closed by a removable blind stopper 20.

Next, I will explain the function of this disaster prevention cap.

When gas leaks from the container valve 6 of the cylinder 5, the leaked gas passes through the abatement device I6 and the connecting pipe I7 to the balloon 1.
1. At this time, a part of the leaked gas is rendered harmless while passing through the detoxifier 16.

In addition, if a large amount of gas is expected to leak, or if the balloon 11 that was previously attached is full,
The blind stopper 20 is removed and the balloon 11 is further attached.

In this disaster prevention cap, a balloon U is attached to the connecting pipe 17.
Since a plurality of balloons can be attached, there is an advantage that it is easy to deal with cases where a large amount of gas leaks or when the balloon 11 becomes full.

(Embodiment 4) FIG. 4 shows an embodiment of the disaster prevention cap according to claim 1.

This disaster prevention cap is composed of only the mounting member 10. An opening is formed in the lower part of the mounting member 10, and the opening is in close contact with the upper outer surface of the cylinder 5, in this example, the outer periphery of the neck ring 13, and the upper end is gradually reduced in diameter and closed. The mounting member 10 is formed to have an inner diameter slightly larger than the outer diameter of the cylinder cap 9 so that it can be easily placed over the cylinder cap 9 of the cylinder 5. In addition, this mounting member 10
The inner diameter of the opening is set to be slightly smaller than the outer diameter of the neck ring 13 of the cylinder 5 at a predetermined width.

The mounting member IO is made of a flexible material with low gas permeability, such as natural rubber, butyl rubber, chloroprene rubber, etc.

Next, how to use this disaster prevention cap will be explained.

The disaster prevention cap consisting only of the mounting member 10 is mainly used by being attached in advance to the cylinder 5 that has been filled.

At that time, the opening of the mounting part 110 is fitted into the neck ring 13 of the cylinder 5, and the ring 1 is fitted with the fixing fitting 14.
It is tightly fixed to the outer surface of 3.

In this disaster prevention cap, if gas leaks from the container valve 6 of the cylinder 5, etc., the mounting member is
0 expands, and gas leak accidents can be detected by visually detecting the deformation.

Moreover, if you attach this disaster prevention cap to cylinder 5,
Since the leaked gas remains within the cap and does not diffuse into the atmosphere, gas leak accidents can be detected without contaminating the outside air.

(Embodiment 5) The disaster prevention cap shown in FIG. 5 includes a transparent cup 25 filled with a detecting agent 24 that changes color when reacting with leaked gas on the upper part of the mounting member 10. The detection agent 24 includes
Various materials are available, but if the gas filled in the cylinder 5 is hydrogenated hydrogen (A sr(3)), silica gel impregnated with mercuric bromide may be used. desirable.

The disaster prevention cap of this example is used in the same manner as that of the fourth embodiment. In the disaster prevention cap of this example, when a gas leak occurs from the attached pot 5, the detection agent 24 changes color, so that a gas leakage accident can be discovered by visually checking this.

(Embodiment 6) The disaster prevention cap shown in FIG. 6 has a detection pattern 26 drawn on the outer surface of the shoulder lOa of the mounting member 10, which deforms when the mounting member 10 expands. This mounting member lO
The shoulder portion 10a is formed thicker than other portions, so that the detection pattern 26 deforms more noticeably.

This disaster prevention cap is used in the same manner as in the fourth embodiment. When gas leaks from the mounted cylinder 5, the mounting member 10 expands. Then, since the detection pattern 26 is deformed, a gas leakage accident can be discovered by visually recognizing this.

(Embodiment 7) In the disaster prevention cap shown in FIG. 7, a bellows-shaped pipe 27 is connected to the mounting portion Hto. This bellows-shaped tube 27 has one end closed and the other end communicating with the inside of the skein attachment member 10. Furthermore, as shown in FIG.
The deep part of a (the part indicated by the broken line in the figure) is colored.

This disaster prevention cap is airtightly fixed to the neck ring 13 of the cylinder 5 with the bellows-shaped tube 27 contracted. When a gas leak occurs from the installed cylinder 5, the bellows-shaped tube 27 expands due to the leaked gas, and by visually checking this, a gas leakage accident can be discovered. Furthermore, when the bellows-shaped tube 27 extends, the color painted in the deep part of the groove 27a becomes visible, so that gas leakage accidents can be detected more reliably.

(Embodiment 8) In the disaster prevention cap shown in FIG. 9 and FIG. 1O, a perforable portion 28 is formed in the mounting member IO. This pierceable portion 28 is a portion into which a hollow needle can be inserted, and which is formed so as to close when the inserted hollow needle is pulled out.

In this example, the perforable portion 28 is formed by adhering an elastic piece 29 to the inner surface of the rubber mounting member IO. A cylindrical body made of an elastic material such as rubber can also be used as the elastic piece 29, but in this example, the elastic piece 29 is provided with a notch 30 that opens only when a needle is inserted. A thick disc made of soft plastic is used.

Next, the function of this disaster prevention cap will be explained.

In this example of the disaster prevention cap, gas leakage can be tested by inserting a sensor probe (hollow needle) into the perforable portion. It is also possible to insert the processing conduit of the gas processing device, which is formed into a hollow needle shape, into the disaster prevention cap through the perforable portion 28 to extract leaked gas for processing. Furthermore, if the gas filled in the cylinder 5 is a self-combustible gas such as silane, a hollow needle is inserted into the pierceable part 28 and nitrogen gas is blown in to replace the air in the disaster prevention cap with nitrogen. , it is possible to prevent damage to the mounting member IO due to a reaction between leaked gas and oxygen.

(Example 9) First! The disaster prevention cap shown in the figure has a connecting pipe 12 connected to a mounting member 0. In this example, the mounting member 10
and the connecting pipe 12 are integrally formed. One end of the connecting pipe 12 is open, and this conduit is closed with a pinch cock 32. This disaster prevention cap is entirely made of rubber.

Moreover, the mounting member IO of this disaster prevention cap is formed so as to cover up to the upper part of the body of the cylinder 5.

The opening of the mounting member 10 has a predetermined width at a portion slightly inward from the end, and is smaller in diameter than the outer diameter of the body of the cylinder 5, and the disaster prevention cap is attached to the container at this portion with the smaller inner diameter. It is tightly fixed to the upper outer surface of the torso by its contractile force.

Even with the disaster prevention cap of this example, when a gas leakage accident occurs, the mounting member IO expands and deforms, so that the gas leakage can be discovered by visually observing the deformation. In addition, a gas leak accident caused by a small counterfeit gas can be investigated by inserting a sensor probe of a gas detector into the connecting pipe 12. In addition, the detection tube containing the detection agent is connected to the connecting tube 12.
It can be installed at all times to detect gas leaks.

If the detection agent changes color and gas leakage is detected, the leaking gas can be collected by attaching a balloon] 1 to the connecting pipe 12.

Since this disaster prevention cap is formed so as to be tightly fixed to the upper part of the body of the cylinder 5, it has the advantage that it can be attached to the cylinder 5 which is not provided with the neck ring 13. Furthermore, there are cases where aluminum cylinders have cracked shoulders, so this disaster prevention cap can also be suitably used for such aluminum cylinders.

(Example 10) The disaster prevention cap shown in FIG. 12 is formed by attaching a separately manufactured connecting pipe 12 to a mounting member IO.

This connecting pipe 12 branches in two directions, and the two branch pipes are provided with valves 33,33.

This disaster prevention cap can obtain the same effect as the disaster prevention cap of Example 9, and since the valves 33 and 33 are provided on the branch pipes branching in two directions, the balloon It attached to each branch pipe, 11 can be successively replaced while leaking gas can be recovered, which has the advantage of being able to deal with large amounts of gas leakage. Further, the detection tube for detecting leaked gas and the balloon 11 can be attached to the mounting member 10 at the same time.

(Example 11) The disaster prevention cap shown in FIG. 13 is formed by integrally forming the mounting member IO, the connecting pipe 12, and the balloon 11. This disaster prevention cap is entirely made of rubber. The part forming the attachment part 11G of this disaster prevention cap is formed to be the thickest, and the part forming the balloon 11 is formed to be the thinnest. Further, a perforable portion 28 is formed in the mounting portion It10 of this disaster prevention cap.

The disaster prevention cap of this example can be attached to the cylinder in advance, but it may also be attached to the container when a gas leakage accident occurs. When a gas leakage accident occurs from a container valve 6 or the like, a disaster prevention cap folded into a small size is placed over the container valve 6, its opening is fitted into a neck ring 13, and the fixing fitting 14 is used to airtightly fix the cap. In this disaster prevention cap, the attachment member 10 is formed thickly and the balloon 1
Since the portion 1 is formed thin, the balloon 11 side is easily inflated. Therefore, even if gas leaks, the pressure increase inside the disaster prevention cap is suppressed to a minimum, and the cylinder 51 of the mounting member 10 is maintained in an airtightly mounted state.

The leaked gas can be treated by inserting a probe (hollow needle) of a conduit connected to the abatement device into the disaster prevention cap from the perforable part 28, and sucking the leaked gas into the abatement device. In addition, after the gas leakage has completely ended, the connecting pipe 12 is sealed with a pin cock, etc., the disaster prevention cap is removed from the cylinder 5, and the abatement chemical solution is injected into the disaster prevention cap, and the leaked gas is contained. Gas treatment can be carried out after the disaster prevention cap is transported to a fixed abatement device.

(Embodiment 12) The disaster prevention cap shown in FIG. 14 is constructed by connecting a mounting member 10 and a balloon 11, which are manufactured separately, through a connecting pipe 12. The mounting member IO is made of thick rubber, and has two perforable portions 28 and 28 formed on its side. Further, one end of the mounting member 10 is reduced in diameter and serves as a connecting portion 34 into which the connecting tube 12 is inserted. The balloon 11 is made of rubber that is thinner than the mounting member IO.

Further, the disaster prevention cap of this example is separately provided with a detection tube 35 shown in FIG. 15. This detection tube 35 has a cylindrical shape, and the detection agent 24 is housed inside thereof. Further, the opening end side of this detection tube 35 is connected to the connecting portion 34 of the mounting member IO.
It is designed to be airtightly connected to the

This disaster prevention cap can detect and collect gas leaks.

When using this disaster prevention cap, first place the mounting member lO so as to cover the container valve 6 of the cylinder 5, and then
The opening of the mounting member 10 is airtightly attached to the neck ring 13 of the cylinder 15 using a screw. In a normal case, a detection tube 35 is attached to the connecting portion 34 of the mounting member 10. If gas leaks from the cylinder 5 in this separable state, the detection agent 24 of the detection tube 35 changes color, so that the gas leak can be detected immediately.

If gas leakage is detected in this way, after closing the connection part 34 of the mounting member 10 using a pinch cock or the like,
The detection tube 35 is removed, and then the balloon 11 is attached using the connecting tube 12. Thereafter, the pinch cock is removed to open the connecting portion 34 and the leaked gas is collected into the balloon 11.

When only recovering leaked gas is performed using this disaster prevention cap, the nozzle 11 is attached to the mounting member 10 from the beginning.

The leaked gas collected in the balloon 11 is treated by inserting a probe (hollow needle) of a conduit of an abatement device (not shown) into the perforable part z8 of the mounting member 10, and suctioning the collected leaked gas.

When using this disaster prevention cap for the cylinder 5 that contains flammable gas such as silane, replace the inside of the cap with a nitrogen atmosphere to prevent the leakage gas from combusting with the air inside the disaster prevention cap. This is desirable. Replacement of nitrogen gas and air can be performed by inserting a nitrogen spray discharge pipe formed into a hollow needle shape into the perforable portion 28 of the mounting member 10.

(Example 13) The disaster prevention cap shown in FIG.
and a rubber balloon +1 are connected by a connecting tube 12 made of transparent plastic.

A detecting agent 24 that reacts with leaked gas and becomes colored is housed in the central portion of the connecting pipe 12 .

The disaster prevention cap of this example is used by being fixed to the neck ring 13 of the cylinder 5 in advance. When gas leaks from the attached cylinder 5, the detecting agent 24 changes color due to the leaked gas. The leaked gas is then collected in the balloon [1].

With this disaster prevention cap, gas leak accidents can be easily detected by checking the color of the detection agent, and the leaked gas is immediately collected from 1.11 balloons, allowing the arrival of gas treatment experts in a safe manner. There is an advantage to being able to wait.

In addition, in the above embodiment, a disaster prevention cap is shown in which the mounting member IO is fixed to the neck ring 13, but if the neck ring 13 of the cylinder 5 has a special shape, the mounting member IO may be attached by interposing an adapter or the like. It is also possible to attach lO.

In addition, in the disaster prevention cap shown in Example 1, if a cock is provided in the connecting pipe 12 so that when the balloon 11 becomes full, the cock can be closed and the balloon 11 can be replaced. 11 can be exchanged safely. In this case, the leaking gas during the exchange of balloon +1 is temporarily stored in the flexible design of the mounting member 10.

"Experimental Example" (Corrosion Resistance Test I) The corrosion resistance of the materials used to create the attachment member 10 and the balloon 11 was investigated.

Natural rubber, butyl rubber, and chloroprene rubber were selected as the materials for forming the mounting member IO and the balloon 11, and test pieces (100 x 200 mm) made of each material were selected.

A thickness of 0.2 mm) was prepared. Next, these test pieces were exposed to a test gas for about 3 days, and it was examined visually and by a tensile test whether there was any deterioration of the material. As the test gas, five types of mixed gases were used, each containing 10% of dichlorosolane, silane, diborane, phosphine, or arsine, with nitrogen gas as the base gas.

As a result, almost no deterioration was observed in any of the rubbers due to each mixed gas, and it was confirmed that the above three types of rubbers are suitable as materials for making the mounting member 1O1 balloon 11 of the present invention.

(Corrosion resistance test 2) 10 cm of natural rubber material was placed in a stainless steel atmospheric test container.
The pieces cut to 20cm x 20cm were hung and degassed by vacuuming. Thereafter, a test gas was introduced to normal pressure, and after being left for about 10 hours, nitrogen gas purging and evacuation were performed, and the natural rubber material was taken out from the container and subjected to visual inspection and tensile test.

The test gas was a gas (NOlI) in which 5% noborane (B2H8) was blended with hydrogen gas as a base gas;
A gas containing 10% phosphine (PH3) in nitrogen gas as a base gas (No. 2), a gas containing 10% arsenic hydride (ASH3) in nitrogen gas (No. 3)
, gas containing 10% solan (SiH,) in nitrogen gas (No. 4), hydrogenated selenium ()-(3S) in nitrogen gas
A gas (No. 5) containing 5% of e) was selected.

The results are shown in Table 1.

Margin below From these results, deterioration of natural rubber was observed at tensile stress of 600% and 800% for sample gas N015;
The tensile strength and elongation did not change even when exposed to O35 gas, so it can be said that natural rubber has good resistance against any gas.

(Extensibility) Balloons 11 were made using natural rubber, butyl rubber, and chloroprene rubber, and nitrogen gas was injected into them to examine their extensibility.

As a result, the balloon 11 did not burst even when expanded by more than 10 times (IOXA) compared to the dimension (diameter A) before expansion, and it was recognized that there was a margin.

Also, considering the permeation of leaked gas that has flowed into the balloon 11, if the expansion of the balloon 11 is set to 3 times (3 The size of the balloon 11 before being expanded is approximately 0 mm, wall thickness 2111 m, and diameter 20 m.
m.

It is desirable to set the length to about 200 cm (material weight about 100 g), and use a 47Q type cylinder (gas volume 7.3).
In this case, the size of the balloon 11 should be approximately 0.2ffi
It has been found that it is desirable to set the diameter to approximately 20 ma+ and the length to approximately 700 mm (material weight approximately 300 g).

(Attachment test) The time required to prevent leakage was measured using the disaster prevention cap of Example 1 shown in FIG.

First, open the container valve 6 of the lOQ type cylinder 5 and
The operation of leaking nitrogen gas and immediately putting on a disaster prevention cap was repeated 10 times.

As a result, it was found that the disaster prevention cap could be attached in 10 to 15 seconds and was able to capture most of the leaked gas.

“Effect of the invention” Claim! The disaster prevention cap has an opening that fits tightly to the outer surface of the upper part of the high-pressure gas container and is made of a flexible material, so it can be attached to the upper part of the high-pressure gas container to isolate it from the outside air. . When gas leaks from the attached high-pressure gas container, the attachment member made of a flexible material expands, and gas leakage can be discovered by visually detecting this deformation.

Therefore, according to this disaster prevention cap, a leakage accident can be detected without leaking gas into the atmosphere, so that the accident can be dealt with safely and in a short time.

In addition, in this disaster prevention cap, the mounting member is formed to be flexible and has an opening that opens to the outside.Since the mounting member is used by covering the top of the high-pressure gas container, it is possible to Even if a cylinder cap is attached to the gas container, the valve can be attached from above, allowing a wide range of applications.

Further, in this disaster prevention cap, since the attachment member is formed to be flexible, it is possible to operate the container valve etc. even when the cap is attached. Therefore,
By using this disaster prevention cap, it is possible to perform simple repairs and tightening to stop gas leakage while preventing leakage gas from flowing into the environment.

Although it is desirable to attach this disaster prevention cap to the high-pressure gas container in advance, it can also be used in the case of a gas leakage accident from a high-pressure gas container that is not equipped with this disaster prevention cap. In such a case, first, the mounting member is extended to cover the location where the gas leak has occurred, and the opening of the mounting member is tightly and tightly fixed to the high-pressure gas container. The leaked gas is then temporarily contained within the cap, allowing it to wait for the arrival of accident handling experts.

In the disaster prevention cap according to the second aspect, since the mounting member is formed of rubber, when gas leaks from the high pressure gas container to which the cap is mounted, the mounting member expands and expands. Therefore, deformation of the mounting member can be easily visually recognized, and gas leakage accidents can be easily discovered.

Further, there is an advantage that a certain amount of leaked gas can be temporarily stored inside the mounting member.

Since the disaster prevention cap according to the third aspect is provided with a detection agent on the mounting member, if gas leaks from the attached high-pressure gas container, a gas leakage accident can be immediately detected by a change in the detection agent. Therefore, this disaster prevention cap has the advantage that gas leak accidents can be detected more reliably.

In the disaster prevention cap according to claim 4, since a perforable part is formed in the mounting member, a hollow needle can be inserted into the perforable part to perform gas leakage inspection using a sensor, treatment of leaked gas, and adjustment of the atmosphere inside the cap. It can be carried out. Therefore, this disaster prevention cap has excellent handling properties.

Since the disaster prevention cap of claim 5 has a connecting pipe connected to the mounting member, a detection tube containing a detection agent can be attached to the connecting pipe to detect gas leakage, or a balloon can be attached to the connecting pipe. Capable of collecting leaked gas. Therefore,
This disaster prevention cap is convenient to handle.

A disaster prevention cap in which the connecting pipe is provided with a valve or the connecting pipe is branched into a plurality of parts becomes easier to handle.

The disaster prevention cap according to claim 8 is provided with a balloon that is more easily inflated than the mounting member, so that the leaked gas is collected in the balloon, and the leaked gas is temporarily stored in the balloon, and then the leaked gas is recovered. The balloon containing the can be removed and subjected to processing.

Therefore, by using the disaster prevention cap of claim 8, even if a gas leak occurs, there is no need to carry a high-pressure gas container, and the leaked gas can be quickly disposed of even in a place where there is no abatement equipment.

Furthermore, in this disaster prevention cap, the increase in pressure within the cap due to leaked gas is suppressed by the expansion of the balloon, so that the internal pressure applied to the mounting member is alleviated. Therefore, in this disaster prevention cap, the airtightness of the attachment between the opening of the mounting member and the outer surface of the high-pressure gas container can be reliably maintained.

If the balloon is made of rubber, the balloon expands and its internal volume increases, so there is an advantage that a large amount of leaked gas can be recovered.

In the disaster prevention cap according to the tenth aspect of the present invention, since a chemical for treating leaked gas is contained, part or all of the leaked gas is immediately disposed of within the disaster prevention cap.

Therefore, this disaster prevention cap is highly safe.

In addition, since the disaster prevention cap of the present invention is formed to be flexible, it can be stored in a folded state, and is small and lightweight, and has a simple structure and low manufacturing cost.

Therefore, the disaster prevention cap of the present invention can be placed in any necessary locations such as transport trucks, laboratories, and storage rooms. In addition, since the method of use is simple, it has the advantage that even inexperienced people can use it.

Furthermore, the disaster prevention cap of the present invention does not take up much space when used, so it can be used even in narrow spaces.

Therefore, according to the disaster prevention cap of the present invention, safety measures against gas leakage from a high-pressure gas container or the like filled with a dangerous gas can be significantly improved.

[Brief explanation of the drawing]

1 to 6 are schematic sectional views showing the disaster prevention caps of Examples 1 to 6, respectively. FIG. 7 is a schematic sectional view of the disaster prevention cap of Example 7. FIG. 8 is a schematic sectional view of the disaster prevention cap of Example 7. FIG. 9 is a schematic cross-sectional view showing the disaster prevention cap of Example 8, FIG. 1O is a front view showing the disaster prevention cap of Example 8, and FIGS. 14 is a schematic sectional view showing the disaster prevention caps of Examples 9 to 11; FIG. 14 is a perspective view showing the disaster prevention cap of Example 12; FIG. 15 is a sectional view showing the detection tube used in the disaster prevention cap of Example 12; FIG. 16 is a schematic sectional view showing the disaster prevention cap of Example 13, FIG. 17 is a schematic view showing a fixed type abatement device conventionally used to treat gas leaks from high-pressure gas containers,
FIG. 18 is a schematic diagram showing the state of use of a disaster prevention cap conventionally used when a gas leak occurs. 5... High pressure gas container (cylinder), 10... Mounting member, 11... Balloon, 12... Connection pipe, 15...
Backflow prevention valve, 19... Processing valve, 24... Detection agent, 2
8... Perforable part, 33... Valve.

Claims (10)

[Claims] (1) A disaster prevention cap consisting of a bag-shaped attachment member made of a flexible material and having an opening that closely fits the upper outer surface of a high-pressure gas container. (2) The disaster prevention cap according to claim 1, wherein the mounting member is made of rubber with low gas permeability. (3) The disaster prevention cap according to claim 1, wherein the mounting member is equipped with a detection agent that changes color when reacting with leaked gas. (4) The disaster prevention cap according to claim 1, wherein the mounting member is provided with a pierceable portion into which a hollow needle can be inserted and which closes when the inserted hollow needle is pulled out. (5) The disaster prevention cap according to claim 1, wherein a connecting pipe is connected to the mounting member. (6) The disaster prevention cap according to claim 5, wherein the connecting pipe is provided with a valve. (7) The disaster prevention cap according to claim 5, wherein the connecting pipe is branched into a plurality of parts. (8) The disaster prevention cap according to claim 1, wherein a balloon formed to be inflated more easily than the mounting member is connected to the mounting member. (9) The disaster prevention cap according to claim 8, wherein the balloon is made of rubber with low gas permeability. (10) The disaster prevention cap according to claim 1 or claim 8, characterized in that a chemical for treating leaked gas is contained therein.