JPS6344060Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a foam fire extinguisher that extinguishes fire by discharging extinguishing liquid.

Many of conventional foam fire extinguishers are easily corroded by extinguishing liquid, and over many years, the corrosion of various parts of the fire extinguisher has become noticeable, and the fire extinguishing function has been affected. This is mainly due to the fact that the container body that stores the extinguishing liquid and the functional parts of the fire extinguisher other than the container body are in communication with each other, allowing the extinguishing liquid to easily flow into each other. The fire extinguishing fluid may leak outside due to falls, vibrations, etc., or the fire extinguishing fluid may flow into various functional parts, such as the starting part or the radiation control part, which will gradually corrode and stop working over time. Was.

The present invention was made to eliminate the above-mentioned defects, and even if there is a rise in outside temperature, overturning, vibration, etc. during transport of the fire extinguisher, the extinguishing liquid can be transferred from the fire extinguisher's container body to each functional part other than the container body. Foam extinguishing foam that prevents the extinguishing liquid from flowing out into each functional part of the fire extinguisher, avoids the situation where corrosion occurs over a long period of time due to the extinguishing liquid that has flowed into each functional part of the fire extinguisher, and can always maintain excellent fire extinguishing function. The purpose is to provide equipment.

Hereinafter, one embodiment of the present invention will be specifically described based on the drawings.

In the figure, 1 is a container body, 2 is a fire extinguishing liquid, and 3 is a pressurized gas cylinder, which are attached to the container body 1 by a holder 4. Reference numeral 5 denotes a cap fixed at the center of the upper part of the container body, and a cap 6 is airtightly attached to the cap 5.

A stop valve 9 is interposed at a suitable position on the side of the container body 1, that is, between the container body 1 and the pressurizing gas cylinder 3.
0, a joint 11, etc. Then, the pressurizing gas cylinder 3 and the stop valve 9 are connected to each other by a connecting pipe 12, and the stop valve 9 is attached and fixed to the container body 1 by a joint 11.
That is, the joint 11 is a hollow tube 13 that extends through the side wall of the container body 1 as shown in FIG.
A female threaded portion 14a is screwed into the male threaded portion 13a provided on the periphery of the hollow tube 13, and a female threaded portion 9 is threaded into the side recess of the stop valve 9.
an outer tube 14 having a male threaded portion 14b that can be screwed into the outer tube 14;
and an introduction tube 15 which is inserted concentrically into the hollow tube 13 and whose one end is screwed into the outer tube 14.
It has

The introduction pipe 15 has a radial communication hole 15a that communicates orthogonally with each other and an axial communication hole 15b that is closed at one end so as to supply pressurized gas from the pressurized gas cylinder 3 into the container body 1. ing. The communication hole 15a communicates with the stop valve 9 side, while the outlet of the communication hole 15a is connected to a backflow prevention valve which is fitted onto the introduction pipe 15 and is made of a stretchable rubber tube, as shown in FIG. 10
It is blocked by. This check valve 10 is disposed near the container body 1 of the stop valve 9 so as to prevent the extinguishing liquid 2 sealed in the container body 1 from entering the stop valve 9. The check valve 10 has a tightening ring 16 on the stop valve 9 side of the opening of the communication hole 15a.
It is fastened around the introduction tube 15 at. In addition,
In this embodiment, the stop valve 9 has a discharge pressure valve 1 on the lower side.
7.

Further, a cap 6 attached to the mouthpiece 5 of the container body 1 is provided with a hose 1 as shown in FIG.
8 is connected to the cap 6, and a siphon pipe 19 is vertically installed in the cap 6 so as to be immersed in the extinguishing liquid 2 in the container body 1, and a siphon pipe 19 is provided between the hose 18 and the siphon pipe 19 to communicate with each other. A connection part 20 is provided which can be connected. The connecting portion 20 is provided with a thin film-like sealing plate 21 made of synthetic resin and having two donut-shaped fibers on its peripheral edge to seal the connecting portion 20. More specifically, as shown in FIG. 7, one end of the mounting bracket 23, which is a hose nipple, is screwed into one side of the cap 6 on the top of the container body 1, and the other end is provided with a hose nipple provided around the outer edge thereof. The serrated portion connects the hose 18 so that it does not come off.

Further, the cap 6 has a cavity 6a in the center, a vertical hole 6b extending vertically downward from the cavity 6a, and a horizontal hole 6c extending horizontally from the cavity 6a. A siphon tube 1 is installed in the horizontal hole 6b and the horizontal hole 6c, respectively.
9 and screw holes 6e and 6f for attaching the mounting fittings 23 are provided.

There is a stepped portion 6d near the space 6a of the horizontal hole 6c.
is provided, and a sealing plate 21 is first attached to this stepped portion 6d.
The sealing plate 21 is sealed in the horizontal hole 6c so that the sealing plate 21 and the packing 24 are in close contact with each other, and then the sealing plate 21 and the packing 24 are stepped by screwing into the screw hole 6f of the cap 6 of the mounting bracket 23 via the packing 24. It is clamped by the portion 6d and the fitting 23 to prevent the extinguishing liquid 2 in the container body 1 from flowing out toward the hose 18 under normal conditions.

Note that 25 indicates a cylinder handle of the pressurizing gas cylinder 3, and 26 indicates a safety valve. When the opening/closing handle 9b of the stop valve 9 is closed and the cylinder handle 25 is opened, the gas pressure inside the cylinder 3 is displayed on the pressure gauge 8. The gas pressure inside the cylinder 3 can be checked. At this time, the gas remaining in the connecting pipe 12 is removed by opening the exhaust pressure valve 17. Also, 27
indicates a nozzle portion attached to the tip of the hose 18.

Next, when using the foam fire extinguisher according to the present invention, first remove the safety plug 26 of the pressurized gas cylinder 3,
When the cylinder handle 25 is opened, the pressure gauge 8 connected to the stop valve 9 indicates the internal pressure of the pressurizing gas cylinder, and when the opening/closing handle 9b of the stop valve 9 is opened, gas is supplied from the pressurizing gas cylinder 3 to the introduction pipe 15. The pressure of the compressed gas causes the check valve 10 to expand as shown in FIG. 5, and the compressed gas is automatically injected into the container body 1. Then, due to the pressure of the injected compressed gas,
The extinguishing liquid 2 passes through the siphon pipe 19, ruptures the sealing plate 21, and releases the extinguishing liquid 2.

Now, what should be noted in the present invention is that even when the foam fire extinguisher is in a normal state other than when the foam fire extinguisher is in operation as described above, the backflow prevention valve 10 and the sealing plate 21 are provided in the foam fire extinguisher, so even if the outside temperature is Falling over or while transporting the fire extinguisher;
Even if the extinguishing liquid does not leak to the outside due to vibration or the like, the extinguishing liquid 2 in the container body 1 is prevented from flowing out to the outside of each container body 1 at the locations of the backflow prevention valve 10 and the sealing plate 21. Also, the nozzle part 2 at the end of the hose
7 or into the stop valve 9, the nozzle portion 27
This also prevents the stop valve 9 from corroding and becoming inoperable, allowing smooth firefighting at all times.

As described above, the present invention includes a stop valve interposed between the container body and the pressurized gas cylinder, and the stop valve is placed close to the container body in order to prevent the extinguishing fluid sealed in the container body from entering the stop valve. A non-return valve is provided, a hose is connected to a cap attached to the container body, and a siphon pipe that hangs down inside the container body is installed in this cap so that the hose and the siphon pipe can communicate with each other. Since a thin film-like sealing plate is provided to seal the connection between the hose and the siphon pipe, this extremely simple structure prevents extinguishing liquid from leaking outside due to a rise in outside temperature, falling over, vibration, etc. during transportation of the fire extinguisher. This prevents the situation where the extinguishing liquid flows into the nozzle at the end of the hose or into the stop valve, causing each functional part to corrode and stop working over time. By eliminating loss and always maintaining excellent fire extinguishing function, it has practical effects such as smooth fire extinguishing operations.

In addition, the above-mentioned non-return valve is made up of a flexible rubber tube that is fastened to the introduction pipe with a tightening ring, and does not use a blocking member such as a spring, so there is no risk of the fire extinguisher falling over. Even if a drug flows into the check valve due to the above-mentioned method, the function of the valve closing member such as the spring may be deteriorated by the drug, and the valve may no longer function as a check valve. do not have.

Furthermore, since the sealing plate is attached by being clamped between the fitting for attaching the hose and the cap, no special parts are required for attachment, and the cost is low. In addition, the sealing plate here is not normally immersed in liquid unless there is a special situation such as the fire extinguisher falling over, so it may swell with the liquid agent in the foam fire extinguisher and may not work reliably. There is no risk of it becoming impossible or being torn by hydraulic pressure. Furthermore, the sealing plate can be easily inspected or replaced by removing the hose fitting.

[Brief explanation of the drawing]

The drawings show one embodiment of the foam fire extinguisher according to the present invention, and FIG. 1 is a partially longitudinal front view, and FIG.
The figure is a side view, Figure 3 is a plan view, Figure 4 is a partially longitudinal side view of the stop valve before operation, Figure 5 is a drawing equivalent to Figure 4 during operation, and Figure 6 is the container. FIG. 7 is a side view showing a vertical section of the upper part of the main body, and FIG. 7 is a partially enlarged side view of FIG. 6 showing a state in which the sealing plate is attached inside the cap. 1... Container body, 2... Fire extinguishing liquid, 3... Pressurizing gas cylinder, 6... Cap, 9... Stop valve, 10
...Return prevention valve, 18...Hose, 19...Siphon pipe, 20...Connection part, 21...Sealing plate.

Claims (1)

[Scope of utility model registration request] A stop valve is interposed between the container body and the pressurizing gas cylinder, and between the stop valve and the container body, there is an axial communication hole that communicates with the stop valve side, and a communication hole that communicates with the axial communication hole and can communicate with the inside of the container body. An introduction pipe having a radial communication hole is provided, the radial communication hole is closed and the introduction pipe is fastened with a tightening ring on either side of the radial communication hole. A backflow prevention valve made of a stretchable rubber tube is fitted on the outside,
A siphon tube that is immersed in the extinguishing liquid in the container body is vertically installed on a cap attached to the mouthpiece of the container body, and a hose that communicates with the siphon tube and discharges the extinguishing liquid is connected via a fitting. A foam fire extinguisher, characterized in that a thin film-like sealing plate is provided between the cap and a fitting for the hose attached to the cap, for sealing the connection between the hose and the siphon pipe.