JPS6145198A - Two-chamber gas cartrige - Google Patents

Abstract

PURPOSE:To keep constant a flow rate of a fire extinguishing agent by partitioning the interior of a cartridge into large and small chambers by a partition wall, cutting a seal plate blocking up an opening of the small chamber so that gas in the small chamber first flows out, and then letting gas in the large chamber flow out through a small hole. CONSTITUTION:A partition wall 4 is formed on a small cartridge 21, which is put in a main body 1 to concentrically dispose large and small chambers A, B. In case of use, a seal plate 7 is cut by a boring needle, whereby a gas space in a fire extinguisher is filled with gas in the small chamber B up to a fixed pressure to be jetted to the outside of a fire extinguisher. When gas in the small chamber B flows out, gas in the large chamber 7 flows into the small chamber B through a small hole 5, and further flows out to the outside. Thus, a fire extinguishing liquid is continuously jetted out.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a two-chamber gas cartridge convenient for use in fire extinguishers. There are two types of fire extinguishers: those that use powder and those that use liquid.

Currently, there are two types of fire extinguishers that use fire extinguishing liquid: an accumulating type that contains the extinguishing liquid and extrusion gas, and a pressurized type that has a cartridge filled with extrusion gas.

Pressure accumulating type fire extinguishers need to have high sealing performance, as long-term airtightness of the fire extinguisher itself is an issue, and gauges are also required to confirm internal pressure retention. In the pressurized type, the extrusion source is enclosed in a cartridge, so a gas expansion space is required during cutting. If the gas expansion space is narrow, the pressure inside the fire extinguisher will rise rapidly, which is dangerous, so it is necessary to have the same amount of gas space as the pressure accumulating type. In addition, if the fire extinguisher rusts and corrodes when stored for a long period of time, the pressure resistance of the fire extinguisher will decrease.
There is also a risk of explosion when cutting. In addition, both types have drawbacks, such as the difference between the initial pressure and the final pressure, making it difficult to see the fire extinguishing target, and the internal volume of the main body being large compared to the amount of extinguishing liquid. .

The present invention aims to provide a two-chamber gas cartridge that can eliminate these drawbacks, and has two large and small chambers that are separated by a partition wall and communicate with each other only through small holes in the partition wall. There is a special feature in that the opening is sealed with a sealing plate for cutting, so that when the cartridge is cut, the starting pressure of the fire extinguisher is ensured by the gas capacity in the small chamber of the cartridge, Moreover, since the gas expansion space of the fire extinguisher only needs to have a gas capacity within the small chamber, this space can be made smaller. Furthermore, since the gas flow rate can be adjusted through the small holes, gas is replenished into the fire extinguisher at a substantially constant flow rate, and the amount and distance of extinguishing liquid poured out are almost constant. This small hole may be provided anywhere on the partition wall of the small room. In addition, sealing performance can be integrated into a small high-pressure gas cartridge, and the pressure inside the fire extinguisher remains constant from the time the small high-pressure gas cartridge is cut to after the extinguishing liquid is poured out, so safety is increased. In addition, since the initial pressure is lower than conventional pressure accumulating and pressurizing types, the fire extinguisher's pressure resistance requirements are lower and the extinguisher itself can be made lighter.

Costs can also be reduced. Moreover, since the gas expansion space within the fire extinguisher can be made smaller, the fire extinguisher can be made smaller and lighter than a fire extinguisher of the same capacity, and the amount of gas used can also be reduced.

Embodiments of the invention will be described in detail below with reference to the drawings.

Reference numeral 1 denotes a cartridge body, one end of which is formed into a spherical shape 2, and the other end of which is open with a continuous neck portion 3vc. A partition wall 4 extends from the neck 3 into the main body 1 and divides the main body 1 into a large room and a small room B. A small hole 5 is bored in this partition wall 4 to allow the large room and the small room B to communicate with each other. The position of this small hole 5 is determined as appropriate, such as at the bottom, side, or top. The opening 6 of this small chamber B is sealed with a sealing plate 7. The capacity of this small chamber B is determined as follows.

Generally, in a fire extinguisher, the pressure storage type gas storage and pressurized gas expansion space account for about 40% of the total capacity.

By using the cartridge of the present application, it is thought that the gas expansion space of the pressurized fire extinguisher will theoretically become about 70% of the total capacity. For example, in a pressurized type 5 fire extinguisher, the gas space is 500 -, and the initial starting pressure is 3 to 4 p/d.
Tfi to ensure.

In the liquefied carbon dioxide gas cartridge V50, the capacity of the small chamber B is about 10% of the total capacity of the cartridge.

In a 95-degree nitrogen gas cartridge, when filling with 150-degree p/crl, the capacity of small chamber B is required to be about 10% of the total capacity.

This example is not limited to just the fire extinguishers mentioned above.

In addition, the capacity of small chamber B also changes as the gas space changes.

If the partition wall 4 is formed into a small cartridge 21 and placed inside the main body 1 and arranged concentrically with the large and small chambers λ and Bt,
It becomes easy to manufacture a two-unit gas cartridge. At this time, so that the sealing plate 7 can be used after filling with gas.
The upper opening of the cartridge 21 is fitted into the protrusion 22 on the lower surface of the sealing plate 6 and the two are welded together, and the cartridge 21 is attached to the main body by inserting a thin gold film between the inner circumferential wall surface of the neck portion 3 and the outer circumferential wall surface of the cartridge 21. 1 and after filling with gas, this sealing plate 7
are welded to the end surface of the neck portion 3. Sealing plate 7t - can be shared. This manufacturing method is also not limited to the above example.

The IJ jig is installed in the fire extinguisher's car) device, and when used, operate the handle and puncture the sealing plate 7 with the puncture needle.
cut. During this cut, the gas in the small chamber B first spills out and fills the gas space within the fire extinguisher to a certain level of 8E, causing extinguishing liquid to be spouted to the outside of the fire extinguisher. Since the gas capacity of this small chamber B is smaller than the total capacity, the pressure within the fire extinguisher body will not increase excessively even if the expansion space within the fire extinguisher body is not very large.

Moreover, it is sufficient to push out the initial extinguishing liquid.

When the gas in the small chamber B flows out, the gas in the large chamber A flows through the small hole 5t.
- flows into the small chamber B, and then flows out to the outside to continuously eject fire extinguishing liquid. Since this small hole 5 has a squeezing effect, the gas in the large chamber A does not flow out all at once, and therefore the amount and distance of extinguishing liquid to be pushed out are almost constant.

According to the present invention, the inside of the cartridge is divided into two large and small compartments by a partition wall, and each compartment is communicated with a small hole, and the small amount of gas in the small chamber is first flowed out by cutting the sealing plate that closes the small chamber opening, and the extinguishing liquid is released. At the same time, the amount of gas in the large chamber is controlled by the small hole to gradually flow out from the small chamber to the outside, making it possible to keep the amount and distance of the extinguishing agent almost constant, and the extinguisher itself. It has various features, such as the fact that the gas expansion space provided in the fire extinguisher can be made smaller, and the fire extinguisher itself can also be made smaller and cheaper.

[Brief explanation of the drawing]

FIG. 1 is a half vertical cross-sectional view showing a specific example of a cartridge according to the present invention, and FIG. 2 is a schematic vertical cross-sectional view of a pressurized fire extinguisher. 1... car) IJ edge body, 2... spherical part, 3...
・Neck. 4... Partition wall, 5... Small hole, A... Large room, B...
- Small chamber, 6... opening, 7... sealing plate, 21... cartridge, 22... protrusion. Patent applicant Japan Carbon Gas Co., Ltd. Figure 1 1 Showa 19/9/7 Patent Office /! l-Noboru Yadono C1
1. Display of incident (
-Showa Tade 2019 Appearance No. 11.1?27 “27
“9°912.shi7ka89.2wa3, Relationship to the case of the person making the amendment, H older #4, Agent address: Doho Building 5, 18116 Nishishinrei R, Minato-ku, Tokyo, Amendment Date of order 6, Number of inventions increased by amendment (1) #4 t * tz-tt completed t)'9
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Claims (3)

[Claims] (1) It has two large and small chambers that are separated by a partition wall and communicate with each other only through a small hole in the partition wall, and the small chamber has an opening that is sealed with a cutting sealing plate. Two-chamber gas cartridge. (2) A two-chamber gas cartridge according to claim (1), wherein the large and small chambers are arranged concentrically and the partition wall forms a small cartridge. (3) The two-chamber gas cartridge according to claim (2), wherein the opening ends of the large chamber and the small chamber are sealed with a common sealing plate.