JP4061520B2 - Pressurized fire extinguisher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a pressurized fire extinguisher that pressurizes a fire extinguishing agent in a container with a pressurized gas, and eliminates the inability to use the fire extinguisher in an emergency due to leakage of pressurized gas in the container. The purpose is to improve the reliability.
[0002]
[Prior art]
As shown in FIG. 3, a conventionally known pressurized fire extinguisher has a bottomed container body 1 and a head part 2 fitted with an operation handle 3 at the top thereof, which is fitted into the opening of the container body 1. The head portion 2 includes a fire extinguishing agent press-out pipe 5 for radiating an internal extinguishing agent to the outside by a radiation nozzle 6 toward the lower side of the cap 4 fitted to the container main body 1, and the container main body 1. A gas discharge pipe 7 for sending pressure gas into the inside and sending out the extinguishing agent inside through the above-mentioned extinguishing agent pressurizing pipe 5 is attached to the inside of the container main body 1 through the gas releasing pipe 7. The small gas cylinder 8 which gave the thin metal sealing board to the opening part for discharging | emitting is attached.
[0003]
Further, the opening portion of the small gas cylinder 8 is faced to a sealed metal sealing plate, and the operation handle 3 is operated downward to move the sharpened tip 9 downward to break the metal sealing plate. The internal pressure gas is discharged, and the pressure gas is pumped into the container body 1 through the gas discharge pipe 7 described above. The extinguishing agent press-out pipe 5, the gas discharge pipe 7, The small gas cylinders 8 are respectively installed in the container main body 1 in a state where the small gas cylinders 8 are housed in the container body 1 and are hermetically attached to the opening of the container main body 1 by the cap 4. The thin metal sealing plate is broken and gas is ejected to extinguish the fire extinguishing chemical filled inside by the radiation nozzle 6.
[0004]
There is also a so-called pressure-accumulation type in which the container main body 1 is filled with a fire extinguishing agent and pressure gas for accumulating the pressure extinguishing agent is stored in the container body 1 without providing the above-described small gas cylinder. In addition, the gas detector tube that changes its color when it comes into contact with carbon dioxide gas is exposed to at least a part of it in the container body. An apparatus that is attached to a part of a fire extinguisher is also known (see Japanese Utility Model Publication No. 61-191559).
[0005]
[Problems to be solved by the invention]
However, in the conventional pressurized fire extinguisher described above, the required gas pressure and gas leakage are inspected before shipment, and there is almost no risk of functional deterioration due to natural gas leakage even after installation. Although there is no long-term installation over time, some of the sealing plate parts will corrode and may cause functional deterioration due to slight gas leakage. It is difficult to ensure sufficient reliability in preparation for use. In that respect, it is convenient to attach the above-mentioned use / non-use identification device, but this is not limited to the case where the pressurized gas filled in the fire extinguisher body uses carbon dioxide. Therefore, even when it comes into contact with carbon dioxide gas, discoloration is not always sufficient and there are many misidentifications.
[0006]
[Means for Solving the Problems]
Therefore, in the present invention, it is an object to solve various problems in the prior art described above and to eliminate the deterioration of functions including those caused by human causes and to further ensure the reliability of the fire extinguisher. Specifically, the fire extinguisher has a built-in pressurized gas for extinguishing a fire extinguishing agent, and a part of the fire extinguisher has a detection material as a leaked gas when the gas in the container leaks out. It has a display means having a display chamber that displays gas leakage by color development or discoloration by contact , and gas in the small gas cylinder leaks between the container and the display chamber through which the display means is connected, and the internal pressure of the container about pressurized extinguisher membrane for passing gas only when raised is characterized that you have been interposed.
[0008]
In the above configuration, when a gas leak in the installed fire extinguisher occurs, the leaked gas enters the display chamber from the conduction portion and contacts the detection material in the display chamber. The detection material that has come into contact with the gas gradually develops or changes color due to a chemical reaction, and visually confirms the presence or absence of gas leakage by visually confirming this color development or discoloration state, so that it is always obvious at a glance whether the function has deteriorated. Can be confirmed, thereby maintaining the reliability of the fire extinguisher.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The specific contents of the present invention will be described below with reference to the embodiment of FIG. 1. Reference numeral 11 denotes a fire extinguisher container body, and 12 denotes a head part that is airtightly attached to the upper opening of the fire extinguisher body 1. The head portion 12 has an operation handle 13 on the upper side, and an upper cap 14 that is screwed into the opening of the container main body 11 is provided at the lower portion, and the upper cap 14 has a transparent surface such as glass or a resin material. The display chamber 15 covered with the plate 17 is formed by excavating the upper cap 14, and the surface of the transparent plate 17 is exposed on the upper surface of the upper cap 14.
[0010]
Further, the display chamber 15 is communicated with the container body 11 by a conducting part 19 communicating with the lower surface side of the upper cap 14, that is, the container body 11, and a diaphragm 16 is formed at a portion near the conducting part 19. A detection material 18 is filled between the diaphragm 16 and the transparent plate 17. The diaphragm 16 is made of fine fibers and has a property of allowing gas to pass but preventing the passage of the fire extinguishing agent, for example, paper having a thickness of about 180 microns, porous plastic, inorganic sheet, or the like.
[0011]
On the other hand, the detection material 18 is not particularly limited as long as it is in contact with the leaked gas when the gas in the container leaks, and color development or discoloration is caused by a chemical reaction. For example, hydrazine, chromic acid, potassium dichromate, etc. Use of iodine pentoxide, titanium trichloride or the like is conceivable. These coloring or discoloring agents vary in color or discoloration depending on the type of pressurized gas used in the small gas cylinder. For example, hydrazine reacts with carbon dioxide to produce purple, and chromic acid or heavy chromium. Potassium acid reacts with hydrocarbons to produce a greenish brown color.
[0012]
Further, iodine pentoxide reacts with aromatic hydrocarbons to turn brown, and titanium trichloride reacts with oxygen to change from black to white. In addition, a color change caused by an indicator for acid or base can be used. In the case where these are liquids, the above-mentioned drugs can be used by being held on a white inorganic or organic carrier, and in the case where they are solid, they can be used as they are or mixed with a white carrier. In addition, the inside of the container main body 11 such as a fire extinguishing agent press-out pipe, a gas discharge pipe, or a small gas cylinder having a thin metal sealing plate at the opening and a drill for breaking the metal sealing plate of the small gas cylinder, etc. Since each structure of the portion inserted in is the same as the conventional fire extinguisher shown in FIG. 3, the description is omitted.
[0013]
In the configuration shown in FIG. 1 described above, the container main body 11 is filled with a certain amount of fire extinguishing agent, and normally the internal pressure is close to normal pressure and the air is filled. If gas leaks from the small gas cylinder into the container main body 11 due to some accident during installation of the fire extinguisher, the gas enters the display chamber 15 from the container main body 11 through the conduction portion 19 and passes through the diaphragm 16. In contact with the sensing material 18 in a diffused state, it reacts with the sensing material 18 and develops or changes color.
[0014]
FIG. 2 shows another embodiment of the present invention. In this case, the display chamber 20 is protruded to the side of the upper cap 14 in the container body 11 of the fire extinguisher, and at least the surface side is transparent so that the inside can be seen through. The display chamber 20 is made conductive by a conduction portion 23 that communicates with the inside of the container body 11 using a hole formed in a part of the container body 11 at the bottom, and a thin diaphragm 21 is provided near the outlet of the conduction portion 23. Is formed.
[0015]
The diaphragm 21 is made of a glass thin film, and normally does not allow gas to pass through. The diaphragm 21 has a strength enough to break when reaching a pressure of about 0.5 kg / square centimeter or more than the normal internal pressure in the container body 11. The peripheral portion is adhesively sealed to the inner surface of the display chamber 20 with an epoxy adhesive, and the detection material 22 similar to that shown in FIG.
[0016]
The display chamber 15 described above is formed only by digging into the upper cap 14 as shown in FIG. 1 or by projecting to the side of the upper cap 14 in the container body 11 as shown in FIG. It is not limited, and a capsule shape such as a round shape or a square shape may be attached to the surface of the upper cap 14 of the fire extinguisher or the side surface of the container body 11, and may be electrically connected to the inside of the container body 11. .
[0017]
[Example 1]
In this example, a general-purpose 10-type fire extinguisher similar to that shown in FIG. 1 was used, a carbon dioxide gas cylinder was used as a pressurizing source, and hydrazine was attached to a silica carrier as the detection material 18. When carbon dioxide gas leaks from the small gas cylinder, the carbon dioxide gas passes through the conduction part 19 and stops the fire extinguishing agent particles entrained by the diaphragm 16 and is diffused by the diaphragm 16 into the hydrazine which is the detection material 18. It contacted and reacted with it and turned purple.
[0018]
[Example 2]
In this example, the same fire extinguisher and detection material as in Example 1 were used, a pressure gas source containing 90 percent of argon gas as a main component, and 10 percent of carbon dioxide gas colored by chemical reaction mixed with this was a small gas cylinder. In addition, as a result of performing the same experiment using a Millipore filter having a pore diameter of 1 micron as the diaphragm 16, the carbon dioxide component in the leaked gas comes into contact with the detection material 18 and reacts. It changed to the same purple color.
[0019]
[Example 3]
In this example, an experiment was conducted using a general-purpose 10-type fire extinguisher similar to that shown in FIG. 2 and a detection material, and using a carbon dioxide gas cylinder as a pressure source. As a result, when the carbon dioxide leaks from the small gas cylinder and the pressure in the container body 11 rises to about 0.5 kg / square centimeter or more than the normal internal pressure, the thin diaphragm 21 is destroyed, and the carbon dioxide component is contained in the display chamber 20. In contact with the detection material 22 and turned purple.
[0020]
【The invention's effect】
As described above, the present invention is a fire extinguisher containing a pressurized gas for extinguishing a fire extinguishing agent, and a part of the fire extinguisher is in contact with the leaked gas when the gas in the container leaks. And a display means having a display chamber for displaying gas leakage by color development or discoloration , and the gas in the small gas cylinder leaks between the container to which the display means is connected and the display chamber, and the internal pressure of the container is reduced. for membrane to pass gas only when raised is shall have been interposed, color development or discoloration even after installation over time pressurized gas fire extinguisher leaks in contact leak gas and the sensing material Therefore, this color development or discoloration situation can be easily seen from the outside, which makes it possible to clearly see the deterioration of the fire extinguisher's function, and can sufficiently improve the reliability of the installed fire extinguisher . In particular, container and display Between the conduction part and the detection material filling part of the display chamber, there is a fine hole for preventing the fire-extinguishing agent in the container from coming into contact with the detection material in the display chamber, and only the gas is allowed to pass through. Alternatively, when a diaphragm made of a glass thin film that does not allow gas to pass through and breaks when the internal pressure rises above the normal pressure in the container body (pressure increase of about 0.5 Kg / square centimeter or more) is formed, The detection material can be prevented from being mixed with a fire extinguishing agent, and sufficient color development or discoloration can be promoted at the time of gas leakage, thereby enabling a clearer visual observation.
[Brief description of the drawings]
FIG. 1 is a side view of a main part of a fire extinguisher showing a part of an embodiment of the present invention in a cross section.
FIG. 2 is a side view of an essential part of a fire extinguisher showing another embodiment of the present invention.
FIG. 3 is a longitudinal sectional view showing a conventionally known pressurized fire extinguisher.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Container main body 12 Head part 13 Operation handle 14 Upper cap 15 Display chamber 16 Diaphragm 17 Transparent board 18 Detection material 19 Conduction part 20 Display chamber 21 Diaphragm 22 Detection material 23 Conduction part

Claims (3)

A fire extinguisher containing a pressurized gas for extinguishing a fire extinguishing agent, and when a gas in the container leaks, the detection material comes into contact with the leaked gas and changes color or changes color in a part of the fire extinguisher and has a display unit having a display chamber for displaying a gas leakage, between the container and the display chamber in which the display means is conductive only when the gas in the small gas cylinder is increased the internal pressure of the container leaking gas by pressurized fire extinguisher membrane passing is characterized that you have been interposed. Claim 1 where in which the diaphragm is formed of fire-extinguishing agent in the container to the conductive portion having fine pores for preventing the contact with the sensing material of the display chamber of the container and the display chamber Pressurized fire extinguisher. 2. The pressurized fire extinguisher according to claim 1 , wherein the detection material is a liquid and is held on a white inorganic or organic carrier.

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