JPS6345236B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a fire extinguishing agent storage container that is pressurized and filled with a fire extinguishing agent such as Halon 1301, and more particularly to a fire extinguishing agent storage container that has an improved structure to prevent minute leakage of the extinguishing agent to the outside of the container. In recent years, fire extinguishing means have been widely adopted in which a storage container press-filled with a halon-based fire extinguishing agent is installed as fire extinguishing equipment, and in the event of a fire, the fire extinguishing agent inside the storage container is extinguished. However, as shown in FIG. 1, conventional storage containers store the extinguishing agent 20 stored in the container 19 under high pressure using a pressurizing gas 21 such as nitrogen gas, and in the event of a fire, the extinguishing agent 20 is stored under high pressure. The fire extinguishing agent 22 is rapidly discharged through a siphon pipe 22 vertically installed in the storage container 19. That is, when filling the extinguishing agent 20 into the container 19 with the pressurizing gas 21, the extinguishing agent 20 is first filled with the pressurizing gas 21.
is supplied into the container 19 and then filled with pressurizing gas 21 from the container outlet 28. This pressurizing gas 21 presses the floater 25 toward the sealing plate 24 against the spring pressure while pushing the siphon tube 22. via container 1
The pressurizing gas having a low specific gravity flows into the container 9 and is supplied to the upper layer of the container through a fire extinguishing agent 20 as shown in the figure. At this time, the pressurizing gas 21 also flows into the cavity inside the sealing plate 24, so when the supply of the pressurizing gas 21 from the container outlet 28 is stopped, the floater 25
is rapidly pushed toward the discharge port 28 and seals the container 19. However, according to the conventional structure as described above, the extinguishing agent 20 subjected to high pressure rises and accumulates inside the siphon pipe 22 even in normal times, so that, for example, the safety valve 23, the sealing plate 24,
Idler 25, pressure gauge mounting part 26, and pressure gauge 27
The extinguishing agent 20 easily leaks to the outside through extremely small gaps or holes in the Bourdon tube, etc., and if the amount of leakage is large, there is a risk that the fire cannot be extinguished even if the cylinder pressure is constant. There were probably a lot of them. Conventionally, the methods used to solve such problems were to install a pressure switch and issue a gas pressure abnormality signal when the internal pressure of the cylinder decreased by a certain amount, or to install a pressure gauge and perform visual inspection. However, this method merely checked for gas leaks, and was completely useless in preventing the leakage of extinguishing agents, which is the fundamental problem, and could not provide a fundamental solution. Therefore, in view of the above-mentioned conventional situation, the present invention aims to provide an improved extinguishing agent storage container that can mechanically prevent extinguishing agent from leaking outside the container through a simple improved configuration. It is something. Hereinafter, the present invention will be described in detail according to embodiments shown in the drawings. Figure 1 is a sectional view showing a conventional type of storage container;
FIG. 2 is a cross-sectional view of a storage container according to the present invention, and FIGS. 3 and 4 are cross-sectional views showing other embodiments of the present invention. In FIG. 2, the storage container 1 according to the present invention is
It has a container body 3 in which a fire extinguishing agent 2 such as Halon 1301 is stored, and a valve device 5 provided at the mouth of the body 3 to close the discharge port 4. The valve device 5 includes a spring 6 and a swinger 7 that is slidable in the horizontal direction by the spring 6. Under normal conditions, the spring 6 is connected to the swinger 7.
is constantly pressed in one direction, and this floater 7 connects the end of the extinguishing agent discharge port 4 and the siphon pipe 8, which will be described later.
The upper ends of the cylindrical portions 9 whose lower ends communicate with each other are closed. Further, the rear surface of the cavity 10 in which the spring 6 is provided is closed with a sealing plate 11 to make it airtight, and a pressurizing gas 12 such as nitrogen gas is supplied to the cavity 10 along with the inside of the container body 3. The pressure, together with the tension of the spring 6, causes the idler 7 to
is pressed into place. On the other hand, the extinguishing agent 2 stored in the container body 3
The pressurizing gas 12 is usually mixed with a pressurizing gas 12 such as nitrogen gas, or after being filled with the extinguishing agent 2, the pressurizing gas 12 is used at a pressure value of 25 kg/cm ² or 42 kg/cm ² (temperature
The extinguishing agent 2 and the pressurizing gas 12 are filled into the container body 3 under pressure (20° C.), but the extinguishing agent 2 and the pressurizing gas 12 are separated within the main body 3. For example, the halon extinguishing agent becomes liquid due to the high pressure. , which is pressurized by the pressurizing gas 12. Therefore, in the event of a fire, the sealing plate 11
It is destroyed by an opening means such as a firing pin (not shown), the gas escapes from the cavity 10, and the floater 7 moves rightward to release the discharge port 4 and the end of the cylindrical part 9. , the container body 3
The extinguishing agent 2 inside will be discharged to the outside of the container through the siphon tube 8. Furthermore, referring to the main features of the present invention, a siphon tube 8 is provided in the container body 3.
is vertically installed with its upper end screwed into the cylindrical portion 9 of the valve device 5, and a pore 13 is provided in the peripheral wall surface 8' of the siphon tube 8 to allow the pressurizing gas in the main body 3 to flow through the siphon tube 8. 12 is connected to the siphon tube 8 through this pore 13.
As a result, the pressure inside and outside of the siphon tube 8 is equalized. Therefore, in conventional storage containers, as mentioned above, the extinguishing agent rises and accumulates inside the siphon pipe, which is a major cause of the extinguishing agent leaking out from the extremely small gaps in each part of the valve device. However, in the storage container of the present invention, with the above configuration, the extinguishing agent is equally subjected to the pressurizing force of the pressurizing gas 12 and does not rise inside the siphon pipe 8, so that leakage of the extinguishing agent is prevented. This can be largely prevented. In addition, in the above embodiment, the pressurizing gas 1
2 is shown in which a small hole 13 is provided in the peripheral wall portion 8' of the siphon tube as a ventilation passage, but the invention is not limited to this. For example, as shown in FIG. After cutting out 14' at the inlet end of the provided threaded portion 14, and screwing the threaded portion 14 into the threaded portion 15 provided on the inner periphery of the cylindrical portion 9, the notched portion 16 and the threaded portion 15 are threaded into each other. The pressurizing gas 12 may be allowed to pass through the inside of the siphon tube through a very small gap, or a passage 17 may be provided in the neck of the valve device 5 as shown in FIG.
In the figure, 18 indicates a pressure gauge that measures the pressure inside the container body. In addition, the following is a table showing experimental comparative examples of leakage prevention effects between the storage container according to the present invention and the conventional type shown in FIG.

[Table] Initially, the gas was 100% at 42Kg/cm ² , but then the pressure gauge pointer showed 34Kg/cm ² due to a leak. Even with the same pointer value, the conventional type had 40% halon gas due to the leakage. However, only 4% is lost according to the present invention. That is, since the pressure of the pressurizing gas such as nitrogen gas acts equally inside the siphon pipe 8 as outside the pipe, the extinguishing agent (halon gas) does not rise inside the siphon pipe 8, and therefore the valve device The extinguishing agent is almost prevented from leaking through extremely small gaps such as No. As described above, the present invention provides a ventilation path that allows the pressurizing gas injected into the fire extinguishing agent storage container to ventilate inside and outside the siphon tube, thereby making the pressure inside and outside the siphon tube equal. By doing so, it is possible to significantly reduce the leakage of extinguishing agent, and therefore, even if the cylinder pressure is at a predetermined value, which has been observed in the past, the amount of extinguishing agent required will be insufficient due to leakage, resulting in the inability to extinguish the fire. Not only can such a situation be avoided, but also remarkable effects can be obtained, such as eliminating the waste of expensive extinguishing agents and enabling efficient use.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of a conventional extinguishing agent storage container, FIG. 2 is a sectional view showing an example of the structure of the extinguishing agent storage container according to the present invention, and FIGS. It is a sectional view showing an example. DESCRIPTION OF SYMBOLS 1... Storage container, 2... Fire extinguishing agent, 3... Container body, 4... Outlet, 5... Valve device, 6... Spring, 7... Balloon, 8... Siphon tube, 9
...Cylindrical part, 10...Empty part, 11...Sealing plate, 12
... Nitrogen gas, 13 ... Pore, 16 ... Notch.

Claims (1)

[Claims] 1. In a fire extinguishing agent storage container in which a fire extinguishing agent such as Halon 1301, which is pressurized and filled inside the container, is discharged outside the container through a siphon tube in the event of a fire, the gas for pressurizing the agent injected into the storage container can be ventilated inside and outside the siphon tube. 1. A fire extinguishing agent storage container, characterized in that a ventilation path is provided so that the pressure inside and outside the siphon tube is equalized.