KR101893591B1 - Compressed air foam system having enhanced durability - Google Patents

Abstract

The present invention provides a compressed air foaming fire extinguishing equipment comprising: a foam mixer for mixing a foaming solution and extinguishing gas to produce compressed air foam; a plurality of compressed gas tanks in which the extinguishing gas is stored at a high pressure; a collecting pipe connected to the plurality of compressed gas tanks and supplied with the extinguishing gas from the plurality of compressed gas tanks and supplying the extinguishing gas to the foam mixer; a decompression apparatus which decompresses the extinguishing gas supplied from the collecting pipe and supplies the decompressed extinguishing gas to the foam mixer; an operation opening/closing valve provided between the decompression apparatus and the foam mixer; a high pressure opening/closing valve for opening/closing the plurality of compressed gas tanks; an auxiliary pressure tank branched and connected between the collecting pipe and the decompression apparatus; and a check valve provided between a branch point where the auxiliary pressure tank is branched and the collecting pipe.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressed air foaming apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressed air spraying apparatus, and more particularly, to a compressed air spraying apparatus having improved durability and maintenance convenience.

Fire extinguishers are generally used to prevent or control fire. These fire extinguishing systems are extinguished using the effects of cooling or air-blocking of the fire extinguisher in the early stages of the fire.

At this time, fire extinguishing facilities include foam fire extinguishing facilities, powder fire extinguishing facilities, halon fire extinguishing facilities, and carbon dioxide extinguishing facilities, and they are used for each situation.

In this case, a collection of fine bubbles formed by foaming a mixture of water and a foaming agent in a certain ratio is blown out by air to cover the surface of the combustible material and block the air, thereby performing the stratification.

Such a fire-fighting facility may be a form in which a catcher solution pre-mixed with pre-fire water and pre-fire water is stored, or the foam and digestion water are separately stored.

The gas-based fire-extinguishing system stores the gases required for fire extinguishing in cylinders. In case of fire, it activates the detector or manual operation to open the cylinder valve and radiate through the nozzle.

It is rarely used in the middle of decompressing method by opening the cylinder valve at the same time and radiating it in the same way. If it is used, it should be further depressurized if it is used in compressed air spraying device, .

Compressed air purging equipment does not exceed 10 bar of compressed gas (air or nitrogen). However, the pressure to be stored in the compressed gas tank generally ranges from 150 bar to 300 bar.

In the conventional compressed air fogging device, the pressure regulator or the valve provided at the downstream end of the decompression device is kept closed while all the compressed gas tanks are opened, and the valve is opened to supply compressed air when a fire occurs.

However, when a state in which the high-pressure compressed gas tank is opened remains for a long time, there is a high possibility that leakage of water occurs in the piping and the like.

Particularly, in case of installation in a fire truck, additional dangerous factors may occur as the compressed gas tank is always open while the vehicle is running.

An object of the present invention is to provide a compressed air foaming apparatus having a large-capacity, high-pressure compressed gas tank, a structure capable of maintaining a standby state of a compressed air foaming apparatus in a state in which a valve for opening and closing a high- Thereby improving the durability of the piping or the like to which high pressure is applied and the convenience of maintenance.

The present invention relates to a compressed air mixer that mixes a catcher solution and compressed air to produce a compressed air bubble; A compressed air cylinder in which compressed air is stored at a high pressure; A decompression device for decompressing the compressed air stored in the compressed air cylinder and supplying the decompressed compressed air to the compressed air cannula; An operation opening / closing valve provided between the decompression device and the compressed air cannula; A high pressure opening / closing valve for opening / closing the compressed air cylinder; An auxiliary pressure air cylinder branched and connected between the compressed air cylinder and the decompression device; And a check valve provided between a branch point where the auxiliary pressure cylinder is branched and the high-pressure on-off valve.

At this time, the check valve may further include a check valve provided between a branch point where the auxiliary pressure air cylinder branches off and the auxiliary pressure air cylinder.

The present invention also relates to a compressed air mixer for mixing a catcher solution with compressed air or compressed nitrogen to produce a compressed air bubble; A plurality of compressed air cylinders in which compressed air is stored at a high pressure; A collecting pipe connected to the plurality of compressed air cylinders to receive compressed air from the plurality of compressed air cylinders and supply the compressed air to the compressed air mixer; A decompression device for decompressing the compressed air supplied from the collecting duct and supplying the decompressed compressed air to the compressed air cannula; An operation opening / closing valve provided between the decompression device and the compressed air cannula; A high pressure opening / closing valve for opening / closing the plurality of compressed air cylinders; An auxiliary compressed air cylinder branched and connected between the collecting tube and the decompression device; And a check valve provided between a branch point where the auxiliary compressed air cylinder branches off and the collective duct.

At this time, one of the high-pressure opening / closing valves for opening / closing the plurality of compressed air cylinders may be a solenoid valve, and the rest may be a slave valve that is opened by interlocking with the solenoid opening.

The compressed air foaming device according to the present invention includes a separate auxiliary compressed air cylinder for maintaining the pressure, so that the compressed air foaming device can be maintained in a standby state in a state where the compressed air cylinder of a large capacity is closed, The durability of piping and the like can be improved and the convenience of maintenance can be improved.

1 is a block diagram showing a conventional compressed air spraying apparatus.
2 is a block diagram showing a compressed air foaming apparatus according to a first embodiment of the present invention.
3 is a block diagram of a compressed air foaming apparatus according to a second embodiment of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning and the inventor shall properly define the concept of the term in order to describe its invention in the best possible way It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. It should be noted that the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It should be understood that various equivalents and modifications are possible.

A compressed air spraying device is a device which extinguishes a fire by spraying compressed air.

Compressed air is generated by injecting compressed air or compressed nitrogen into a catcher solution.

Compressed gas can be a variety of gases, such as air, nitrogen, argon, and carbon dioxide, which are useful for digestion. In general, since compressed air is used, compressed air is referred to as a compressed air mixture in a catcher solution.

In addition, the catcher solution means a mixture of foam and digestion water.

1 is a block diagram showing a conventional compressed air spraying apparatus.

As shown in FIG. 1, a general compressed air spraying apparatus includes a compressed gas tank 100 in which the extinguishing gas is stored at a high pressure, a hopper mixer 200 for mixing the extinguishing gas supplied from the compressed gas tank 100 and the catcher solution, .

In the compressed gas tank 100, the extinguishing gas is stored at a high pressure of 100 bar or more (generally 150 bar or 300 bar), and the appropriate pressure to be supplied to the gun mixer 200 is within 10 bars.

Accordingly, the decompression device 110 for decompressing the pressure supplied from the compressed gas tank 100 is provided. The depressurizing device 110 may be provided with a high-pressure side pressure gauge 112 for measuring the pressure before depressurization and a low-pressure side pressure gauge 114 for measuring the pressure after depressurization.

A high-pressure on-off valve 105 is provided between the compressed gas tank 100 and the decompression device 110 to control whether the compressed gas tank 100 is opened or closed.

An operation opening / closing valve 120 is provided between the decompression device 110 and the mixer 200 to control whether decompressed extinguishing gas is supplied to the mixer 200.

A description will now be given of the standby state and operation state of such a compressed air spraying apparatus.

As described above, since the pressure of the gas stored in the compressed gas tank 100 is 100 bar or more, the high-pressure on-off valve 105 is slowly opened while the operation on-off valve 120 is closed, The pressure reducing device 110 is adjusted while confirming the side pressure gauge 114 to set the low pressure side pressure to be the operating pressure of the capsule mixer 200. [ With this setting, the compressed air spraying apparatus is put in a standby state.

At this time, it is important to gradually open the high-pressure on-off valve 105. This is because when the high-pressure on-off valve 105 is instantly opened, an excessive pressure is instantaneously applied to the pressure-reducing device 110, which may damage the pressure-reducing device 110.

However, since the compressed air spraying device must be operated promptly in an emergency fire situation, the operation opening / closing valve 120 is closed in a state where the high-pressure opening / closing valve 105 is completely opened in the standby state .

In this waiting state, since the high-pressure on-off valve 105 is completely opened, pressure is applied to the upstream-side piping and the components of the operation on-off valve 120, There is a high possibility that leakage occurs in the piping. Further, when a leak occurs in the piping, there is a problem that all of the extinguished gas stored in the compressed gas tank 100 is leaked.

2 is a block diagram showing a compressed air foaming apparatus according to a first embodiment of the present invention.

The compressed air spraying apparatus according to the first embodiment of the present invention can maintain the standby state in a state in which the high-pressure on-off valve 105 of the compressed gas tank 100 is closed, thereby improving the durability will be.

As shown in the figure, the compressed air spraying apparatus according to the present invention further includes an auxiliary pressure tank 300 for keeping the decompression apparatus 110 in a standby state.

The auxiliary pressure tank 300 is formed in a small capacity and stores the gas at the same pressure as the compressed gas tank 100.

The auxiliary pressure tank 300 is branched and connected on a pipe connecting the compressed gas tank 100 and the decompression device 110. A check valve 107 is provided between the high-pressure on-off valve 105 and the branch point P and a check valve 307 is provided between the auxiliary pressure tank 300 and the branch point. The check valves 107 and 307 prevent the gas from flowing back to the compressed gas tank 100 or the auxiliary pressure tank 300. The auxiliary pressure tank 300 is provided with an auxiliary opening / closing valve 305 for controlling opening / closing of the auxiliary pressure tank 300.

This structure allows the gas stored in the auxiliary pressure tank 300 to be supplied to the decompression apparatus 110 when the auxiliary opening / closing valve 305 is opened while the high pressure opening / closing valve 105 connected to the compressed gas tank 100 is closed, So that the decompression apparatus 110 can be maintained in an operating state.

In other words, after the compressed air spraying device is manufactured, the auxiliary opening / closing valve 305 connected to the auxiliary pressure tank 300 side is gradually opened (opened) while the operation opening / closing valve 120 and the high- And the high pressure gas is supplied to the pressure reducing device 110, and then the pressure reducing device 110 is adjusted to a pressure suitable for the operation of the pump mixer to maintain the standby state.

When the high pressure opening / closing valve 105 and the operation opening / closing valve 120 are both opened in the state of being kept in the standby state in the fire state, the extinguishing gas is supplied to the injector 200 to operate the compressed air foaming device.

This structure can hold the high-pressure on-off valve 105 of the compressed gas tank 100 in a closed state in the standby state, so that the piping from the high-pressure on-off valve 105 to the check valve 107, State can be maintained. Accordingly, the possibility of pipe leakage can be reduced, and even if the pipe leaks, the extinguishing gas stored in the compressed gas tank 100 is not leaked.

3 is a block diagram of a compressed air foaming apparatus according to a second embodiment of the present invention.

The compressed air foaming device according to the first embodiment described above shows one compressed gas tank, but the second embodiment relates to a large facility having a plurality of compressed gas tanks.

And a plurality of compressed gas tanks in case of a large fire extinguishing facility having a large amount of catcher solution. In the illustrated embodiment, three compression gas tanks 100-1, 100-2 and 100-3 may be provided, or a larger number of compressed gas tanks may be provided.

When there are a plurality of compressed gas tanks 100-1, 100-2, and 100-3, a collecting pipe 150 in which the extinguishing gases supplied from the compressed gas tanks 100-1, 100-2, and 100-3 are combined is provided. And the extinguishing gas supplied from the plurality of compressed gas tanks 100-1, 100-2, and 100-3 is supplied to the decompressor 110 via the collecting pipe 150. [

In the case of conventional facilities, the pressure was applied to the collecting pipe 150 in order to supply the digester gas to the decompressor 110. However, since various pipes are connected to the collecting pipe 150, there is a high possibility of leakage at the connection portion of the pipe.

Accordingly, in the compressed air fogging apparatus according to the second embodiment of the present invention, the auxiliary pressure tank 300 is connected between the collecting pipe 150 and the decompression device 110 so that even when no pressure is applied to the collecting pipe 150 And the fire extinguishing device (110) is supplied with fire extinguishing gas so as to maintain a standby state.

At this time, a check valve 107 is provided between the branch point branched to the auxiliary pressure tank 300 and the collecting pipe 150, and the pressure applied to the decompression device 110 in the auxiliary pressure tank 300 is supplied to the collecting pipe 150 In the present invention.

On the other hand, a single compressed gas tank 100-1 of a plurality of compressed gas tanks is constituted by a solenoid valve as a high-pressure on-off valve 105, while the remaining compressed gas tanks 100-2 and 100-3 are connected to high- And a slave valve 106 which is opened when the opening / closing valve 105 is opened. Of course, all the high-pressure opening / closing valves may be constituted by solenoid valves, but it is more advantageous in terms of cost to constitute only one solenoid valve.

The slave valve 106 may have a structure that is automatically opened to a pressure that is opened at the time of the high-pressure on-off valve 105.

On the other hand, a check valve 137 is also provided between the operation opening / closing valve 120 for opening and closing the low pressure side piping of the decompression device 110 and the pump mixer 200 so that the extinguished gas or compressed air can be supplied to the decompression device 110 side It is preferable to prevent backflow.

It is to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and the scope of the present invention will be indicated by the appended claims rather than by the foregoing detailed description. It is intended that all changes and modifications that come within the meaning and range of equivalency of the claims, as well as any equivalents thereof, be within the scope of the present invention.

100, 100-1, 100-2, 100-3: Compressed gas tank
105, 106: High-pressure opening / closing valve
107: Check valve
110: Pressure reducing device
120: Operation opening / closing valve
137: Check valve
150: Collecting hall
200: Four Mixer
300: auxiliary pressure tank
305: auxiliary opening / closing valve
307: Check valve
P: Junction point

Claims (4)

A mixer for mixing the catcher solution and the compressed air to produce a compressed air bubble;
A compressed gas tank in which the extinguishing gas is stored at a high pressure;
A decompression device that decompresses the extinguishing gas stored in the compressed gas tank and supplies the decompressed gas to the injector;
An operation opening / closing valve provided between the pressure reducing device and the mixer;
A high pressure opening / closing valve for opening / closing the compressed gas tank;
An auxiliary pressure tank branched and connected between the compressed gas tank and the decompression device, the auxiliary pressure tank storing extinguishing gas of the same pressure as the compressed gas tank and having a capacity relatively smaller than that of the compressed gas tank; And
And a check valve provided between a branch point where the auxiliary pressure tank is branched and the high-pressure opening / closing valve,
Wherein a pressure is applied to the decompression device by using the pressure of the auxiliary pressure tank so that the high pressure opening / closing valve can be kept in a standby state in a closed state.
The method according to claim 1,
Further comprising a check valve provided between a branch point where said auxiliary pressure tank branches off and said auxiliary pressure tank.
A mixer for mixing the catcher solution and the extinguishing gas to produce a compressed air bubble;
A plurality of compressed gas tanks in which the extinguishing gas is stored at a high pressure;
A collecting pipe connected to the plurality of compressed gas tanks to receive digested gas from the plurality of compressed gas tanks and supply the digested gas to the four-way mixer;
A decompression device that decompresses the extinguishing gas supplied from the collecting duct and supplies the decompressed gas to the hopper;
An operation opening / closing valve provided between the pressure reducing device and the mixer;
A high pressure opening / closing valve for opening / closing the plurality of compressed gas tanks;
An auxiliary pressure tank branched and connected between the collecting pipe and the decompression device, the auxiliary pressure tank storing extinguishing gas of the same pressure as the compressed gas tank and having a capacity relatively smaller than that of the compressed gas tank; And
And a check valve provided between a branch point where the auxiliary pressure tank is branched and the collective tube,
Wherein a pressure is applied to the decompression device by using the pressure of the auxiliary pressure tank so that the high pressure opening / closing valve can be kept in a standby state in a closed state.
The method of claim 3,
Wherein one of the high-pressure opening / closing valves for opening / closing the plurality of compressed gas tanks is a solenoid valve and the remaining one is a slave valve interlocked with the solenoid valve opening to open.

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