CN105363161A - Fire-fighting foam fire extinction system capable of injecting gas-liquid two-phase jet flow - Google Patents

Abstract

The invention discloses a fire-fighting foam fire extinguishing system for spraying gas-liquid two-phase jet flow, which comprises: a compressed gas generating device, whose outlet outputs high-pressure gas; a liquid storage tank, which stores or outputs foam base liquid; a foam gun, which is connected to the The liquid storage tank is connected to fully mix the high-pressure gas and foam base liquid to generate fire-fighting foam and output it to the outside; the shunt pipe has an inlet and two outlets, its inlet is connected to the outlet of the compressed gas generating device, and its outlet is connected to The liquid storage tank, the other outlet is connected to the foam gun; the liquid electromagnetic regulating valve is placed at the outlet of the shunt pipe relative to the liquid storage tank; the gas electromagnetic regulating valve is placed at the outlet of the shunt pipe relative to the foam gun; the control device controls The opening and closing of the first regulating valve and the second regulating valve. The invention more precisely controls the ratio of the high-pressure gas and the foam base liquid input in the foam gun per unit time, and simultaneously eliminates the driving force difference caused by multiple driving sources.

Description

Fire-fighting foam fire extinguishing system with gas-liquid two-phase jet

technical field

The invention relates to the technical field of foam fire extinguishing systems, in particular to a fire-fighting foam fire extinguishing system that sprays gas-liquid two-phase jets.

Background technique

At present, the compressed air Class A foam fire extinguishing uses the water flow signal to control the rotational speed of the Class A foam volume pump, so as to realize the mixing of water and Class A foam in a prescribed proportion. During this process, the pressure of the compressed air and the mixed liquid is equalized by means of a pressure balance device, so that the compressed air enters the mixed liquid to form a two-phase flow. Although the above prior art has a high degree of automation, its structure is complex, expensive and difficult to maintain.

In addition, due to the large change of system control pressure, the mixing ratio error of water, foam and compressed air is also relatively large, especially the balance point of gas and hydraulic pressure is easy to drift, resulting in the interruption of the injection of compressed air type A foam.

A multifunctional compressed air foam fire extinguishing device is disclosed in the patent document with publication number CN103055455A (hereinafter referred to as reference document 1). Including fire extinguishing spray gun, air compressor and high-pressure water pump, wherein: fire extinguishing spray gun includes mixing chamber, foaming chamber and nozzle connected in sequence; It is connected through the valve pipeline; there is a cylindrical filter in the foaming chamber; the air compressor is also connected in parallel with an adjustable foam into the valve pipeline. In the present invention, the fire extinguishing spray gun is integrated with a compact design and matched with a pneumatic foam proportional mixing device, and the high-pressure water pump is connected to the fire extinguishing spray gun. The one-way valve in the mixing chamber adjusts the proportion of each medium. The fire extinguishing device of the present invention is easy to move and is suitable for various fire extinguishing media and different fire extinguishing sites.

The multifunctional compressed air foam fire extinguishing device mentioned in Reference 1 has a good ratio adjustment function, and can adjust the ratio of each medium entering the mixing chamber. But the way the device forms the two-phase flow and makes proportional adjustments relies on at least two power sources, a water pump and an air compressor. The driving force provided by multiple power sources must be different, and when controlling the proportional regulating valve and the three-way valve to complete the proportional adjustment of each medium, the balance point needs to be re-established, and the balance point needs to be re-established. The process requires attention to the differences between power sources.

Contents of the invention

The object of the present invention is to overcome or alleviate at least part of the above-mentioned shortcomings, and hereby provides a fire-fighting foam fire extinguishing system for spraying gas-liquid two-phase jets, which includes: a compressed gas generating device, whose outlet outputs high-pressure gas; a liquid storage tank, which stores Or output the foam base liquid; the foam gun is connected with the liquid storage tank through the infusion tube, fully mixes the high-pressure gas and the foam base liquid to generate fire extinguishing foam and outputs it to the outside; the shunt pipe has an inlet and two outlets, and its inlet is connected to the The outlet of the compressed gas generating device is connected, one outlet is connected to the liquid storage tank, and the other outlet is connected to the foam gun; the liquid electromagnetic regulating valve is placed at the outlet of the shunt pipe relative to the liquid storage tank; the gas electromagnetic regulating valve is placed at the outlet of the liquid storage tank. The outlet of the shunt pipe relative to the foam gun; the control device controls the opening and closing of the first regulating valve and the second regulating valve.

Preferably, the compressed gas generating device at least includes a filter, a dryer, an air storage tank and an air compressor; the air compressor compresses external air to the air storage tank; the storage or output of the air storage tank is provided by the The compressed air input by the air compressor; the dryer is used to dry the compressed air output from the air storage tank; the filter is used to filter and sterilize the dried compressed air and output it to the distribution pipe.

Further, the filter at least includes an oil-water separator, a main line filter and a micro-oil dew filter connected in sequence, the output end of the dryer is connected to the input end of the oil-water separator, and the micro-oil dew filter The output of the device is connected to the inlet of the splitter.

In addition, the outlet of the shunt pipe relative to the foam gun is provided with a liquid electromagnetic flowmeter, and the infusion pipe is provided with a gas electromagnetic flowmeter, and the monitoring signals of the liquid electromagnetic flowmeter and the gas electromagnetic flowmeter are both output to the control device , the control device has a display module, and the display module digitally displays the flow value corresponding to the monitoring signal.

In addition, the foam gun includes a liquid flow control chamber, a mixing chamber and a foaming chamber connected in sequence; the inlet of the liquid flow control chamber is connected to the infusion tube, and its outlet is connected to the inlet of the foaming chamber. The control cavity is provided with at least one flow buffer plate, and the flow buffer plate is provided with at least one buffer hole. The mixing chamber has an air inlet connected to the outlet of the shunt pipe relative to the foam gun. The mixing chamber The outlet of the foaming chamber communicates with the inlet of the foaming chamber, the foaming chamber has a built-in block, and the outlet of the foaming chamber communicates with the outside.

In addition, the mixing chamber and/or the foaming chamber are made of transparent materials.

In addition, the foaming gun is disassembled and connected to the bracket.

In addition, the outlet of the shunt pipe relative to the foam gun is provided with a gas manual valve, and the infusion tube is provided with a liquid manual valve.

In the present invention, the compressed gas generating device drives the high-pressure gas and the foam base liquid into the foam gun respectively, and through the control of the liquid electromagnetic regulating valve and the gas electromagnetic adjustment by the control device, the flow rate of the high-pressure gas and the foam base liquid input into the foam gun can be adjusted. , to more accurately control the ratio of high-pressure gas and foam base liquid input in the foam gun per unit time, and then regulate the composition of the mixture of high-pressure gas and foam base liquid, to achieve efficient foam fire extinguishing for multiple environments, and at the same time eliminate due to multiple The driving force difference caused by the driving source.

Description of drawings

These and other aspects of the invention will now be described in more detail with reference to the accompanying drawings, which show presently preferred embodiments of the invention. in:

Fig. 1 is a functional block diagram of the present embodiment;

Figure 2 is a sectional view of the foam gun.

In the figure: 11. Air compressor; 12. Gas storage tank; 13. Dryer; 14. Filter; 21. Gas manual valve; 22. Gas electromagnetic regulating valve; 23. Gas electromagnetic flowmeter; 31. Liquid electromagnetic regulation valve; 32, pressure relief valve; 33, liquid storage tank; 34, drain valve; 41, electromagnetic pressure gauge; 42, liquid manual valve; 43, liquid electromagnetic flowmeter; 5, foam gun; 51, flow control cavity; 52 . Mixing chamber; 53. Foaming chamber; 531. Block; 532. Foaming net; 6. Support.

detailed description

Below in conjunction with accompanying drawing and specific examples, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

As shown in Figure 1, a fire-fighting foam fire extinguishing system that sprays gas-liquid two-phase jets includes an air compressor 11. The compressed air input by the air compressor 11 is stored, and the inside of the air storage tank 12 maintains a relatively high pressure to be used as a power source. Then, when the gas storage tank 12 is needed as a power source and a gas source, the connection valve between the gas storage tank 12 and the drier 13 is opened, and the high-pressure gas output by the gas storage tank 12 is first dried by the drier 13, and then The high-pressure gas is sterilized and sterilized by the filter 14 .

The outlet of the filter 14 is connected to the inlet of the shunt pipe, and the shunt pipe has two pipelines, one of which communicates with the liquid storage tank 33 and the other communicates with the foam gun 5 . Then, the high-pressure gas sterilized by the filter 14 and sterilized enters the liquid storage tank 33 and the foam gun 5 from the two pipelines of the shunt pipe respectively. The high-pressure gas entering the liquid storage tank 33 squeezes the inside of the liquid storage tank 33, so that the foam base liquid in the liquid storage tank 33 enters the foam gun 5 through the infusion tube, and the foam gun 5 is mixed with high-pressure gas and foam base liquid to realize two-phase Flow, and then to achieve foaming, to complete the jet.

In addition, the filter 14 of this embodiment includes an oil-water separator, a main pipeline filter 14 and a micro-oil dew filter 14 to perform C, T, A three-stage precision filtration on high-pressure gas.

Certainly, the present embodiment controls the fluid flow that the two pipelines of the shunt pipe can flow through; The pipeline is provided with a gas electromagnetic regulating valve 22, and the liquid electromagnetic regulating valve 31 and the gas electromagnetic regulating valve 22 are all controlled by a control device, which can be a single-chip microcomputer or PLC and other equipment. Then, through the single driving source and the control of the liquid electromagnetic regulating valve 31 and the gas electromagnetic regulating valve 22 in this embodiment, when the gas and liquid input into the foam gun 5 are proportionally adjusted, the driving source provided can be guaranteed. There is no deviation in the driving force.

The shunt pipe of the present embodiment is provided with a gas electromagnetic flowmeter 23 relative to the pipeline of the foam gun 5, and the transfusion pipe is provided with a liquid electromagnetic flowmeter 43 valve 42, and the gas electromagnetic flowmeter 23 and the liquid electromagnetic flowmeter 43 valve 42 are all connected to the control valve. The device is connected, and the control device is connected with a display. Then, after the gas electromagnetic flowmeter 23 and the liquid electromagnetic flow detect the fluid flow value of the corresponding pipeline, it is transmitted to the control device in the form of an electrical signal, and the control device solves such an electrical signal to obtain the flow value of the fluid in the corresponding pipeline , and displayed on the monitor, which is convenient for the staff to observe and record. Preferably, the control device of this embodiment is connected to a multi-channel high-speed paperless recorder to display the flow data of each flowmeter.

In addition, since the liquid storage tank 33 of this embodiment involves increasing the gas pressure in the tank to output the foam base liquid, it must be equipped with a pressure relief valve 32 and a drain valve 34, and an electromagnetic pressure valve is provided on the infusion tube. Gauge 41, electromagnetic pressure gauge 41 is connected with control device.

In addition, the infusion tube is provided with a liquid manual valve 42 , and the pipeline of the shunt pipe opposite to the foam gun 5 is provided with a gas manual valve 21 . Then, when the control device fails or emergency braking is required, the gas input to the foam gun 5 is closed through the gas manual valve 21 , and the liquid input to the foam gun 5 is closed through the liquid manual valve 42 .

In addition, as shown in Figure 2, the foam gun 5 of the present embodiment is erected on the bracket 6 and it includes a liquid flow control chamber 51, a mixing chamber 52 and a foaming chamber 53 communicated in sequence; the inlet of the liquid flow control chamber 51 is connected to the infusion tube, Its outlet is connected with the inlet of the foaming chamber 53, and two flow buffer plates are arranged in the liquid flow control chamber 51, one flow buffer plate is provided with a buffer hole, and the other flow buffer plate is provided with three buffer holes. Then, when the foam base liquid flows through the flow control chamber 51, it will be restricted by the two flow buffer plates, so that the flow of the liquid entering the mixing chamber 52 through the buffer holes is controlled.

Further, the mixing chamber 52 has an air inlet, and its air inlet is connected with the outlet of the shunt pipe relative to the foam gun 5, and the outlet of the mixing chamber 52 is connected with the inlet of the foaming chamber 53, and the foaming chamber 53 has a built-in stopper 531. The outlet of the bubble chamber 53 communicates with the outside. Then, after the liquid in the mixing chamber 52 rushes into the foaming chamber 53, the mixed liquid is broken up by the block 531, so that the gas and liquid in the mixed liquid are fully mixed to form a uniform and delicate fire extinguishing foam and then output to the outside.

In addition, a foam net 532 is provided on the side of the block 531 opposite to the nozzle to further disperse the mixed liquid, so that the foam base liquid and the high-pressure gas react more fully.

In addition, the foaming chamber 53 is made of plexiglass, allowing workers to visually observe the real-time mixing state of liquid and gas in the foaming chamber 53 .

Claims (8)

1. A fire-fighting foam fire extinguishing system for spraying gas-liquid two-phase jets, characterized in that it comprises: a compressed gas generating device, whose outlet outputs high-pressure gas; liquid storage tank, which stores or outputs foam base liquid; foam gun, which is connected with the The liquid storage tank is connected to fully mix the high-pressure gas and foam base liquid to generate fire-fighting foam and output it to the outside; the shunt pipe has an inlet and two outlets, its inlet is connected to the outlet of the compressed gas generating device, and its outlet is connected to The liquid storage tank, the other outlet is connected to the foam gun; the liquid electromagnetic regulating valve is placed at the outlet of the shunt pipe relative to the liquid storage tank; the gas electromagnetic regulating valve is placed at the outlet of the shunt pipe relative to the foam gun; the control device controls The opening and closing of the first regulating valve and the second regulating valve. 2. the fire-fighting foam fire extinguishing system of spraying gas-liquid two-phase jet according to claim 1, is characterized in that, described compressed gas generator comprises filter, drier, gas storage tank and air compressor at least; The compressor compresses the external air to the air storage tank; the air storage tank stores or outputs the compressed air input by the air compressor; the dryer dries the compressed air output by the air storage tank; the filter Filter, sterilize and output the dried compressed air to the shunt pipe. 3. the fire-fighting foam fire extinguishing system of spraying gas-liquid two-phase jet according to claim 2, it is characterized in that, described filter comprises at least successively connected oil-water separator, main line filter and micro-oil dew filter, so The output end of the dryer is connected to the input end of the oil-water separator, and the output end of the micro-oil dew filter is connected to the inlet of the shunt pipe. 4. The fire-fighting foam fire extinguishing system of spraying gas-liquid two-phase jet according to claim 1, characterized in that, the outlet of the shunt pipe relative to the foam gun is provided with a liquid electromagnetic flowmeter, and the infusion pipe is provided with a gas electromagnetic flowmeter. The monitoring signals of the liquid electromagnetic flowmeter and the gas electromagnetic flowmeter are both output to the control device, and the control device has a display module, and the display module digitally displays the flow value corresponding to the monitoring signal. 5. the fire-fighting foam fire extinguishing system of spraying gas-liquid two-phase jet according to claim 1, is characterized in that, described foam gun comprises liquid flow control chamber, mixing chamber and foaming chamber that are communicated in sequence; The inlet of the chamber is connected to the infusion tube, and the outlet is connected to the inlet of the foaming chamber. At least one flow buffer plate is provided in the liquid flow control chamber. The flow buffer plate is provided with at least one buffer hole. The mixing chamber It has an air inlet, which is connected to the outlet of the shunt pipe relative to the foam gun, the outlet of the mixing chamber is connected to the inlet of the foaming chamber, the foaming chamber has a built-in stopper, and the outlet of the foaming chamber communicate with the outside world. 6. The fire-fighting foam fire extinguishing system for spraying gas-liquid two-phase jet according to claim 5, characterized in that, the mixing chamber and/or foaming chamber are made of transparent materials. 7. The fire-fighting foam fire extinguishing system for spraying gas-liquid two-phase jet according to claim 1, characterized in that, the foaming gun is disassembled and connected to the bracket. 8. The fire-fighting foam fire extinguishing system for spraying gas-liquid two-phase jet according to claim 1, characterized in that, the outlet of the shunt pipe relative to the foam gun is provided with a gas manual valve, and the infusion pipe is provided with a liquid manual valve.