CN116421917A - Vehicle-mounted compressed air foam generating system with universal upgrade flow and application method thereof - Google Patents

Abstract

A vehicle-mounted compressed air foam generating system with a universal liter-level flow is used for solving the problems that the existing vehicle-mounted compressed air foam system is difficult to meet the use requirement of a fire truck with a large flow of mixed liquid and the foam proportion is deviated under the condition that the flow of the mixed liquid is small. The invention comprises a vehicle-mounted control unit, a high-flow air supply unit, a high-flow foam unit, a compressed air flow regulating unit, a water-foam mixing pipeline unit, a vehicle-mounted water pump unit and a gas-liquid mixing device unit; the vehicle-mounted control unit is connected with the large-flow air supply unit, the vehicle-mounted water pump unit, the large-flow foam unit and the compressed air flow regulating unit; the high-flow foam unit and the vehicle-mounted water pump unit are connected with the water-foam mixing pipeline unit; the large-flow air supply unit is connected with the compressed air flow regulating unit; the compressed air flow regulating unit and the water-foam mixing pipeline unit are both connected with the gas-liquid mixing unit, and finally output through the gas-liquid mixing unit.

Description

Vehicle-mounted compressed air foam generating system with a flow rate of 10,000 liters and its application method

technical field

The invention relates to a foam generation system, in particular to a vehicle-mounted compressed air foam generation system with a flow rate of 10,000 liters and its application method.

Background technique

The compressed air foam fire extinguishing system is a new type of fire extinguishing technology. First, the foam liquid is mixed with water in a certain proportion, and then the foam mixture is foamed and sprayed out by injecting compressed air.

Many of the current vehicle-mounted compressed air foam systems, because each device is installed in the fire truck, are limited by the interior space of the fire truck and the power source of the vehicle chassis, the maximum can only be a compressed air foam system with a mixture of 6000L/min , and when the flow rate is small, the foam ratio will deviate. Therefore, the commonly used vehicle-mounted compressed air foam system in China is difficult to meet the use requirements of 10,000 liters of large flow.

Contents of the invention

The invention provides a vehicle-mounted compressed air foam generation system with a flow rate of 10,000 liters and its use method, which is used to solve the current vehicle-mounted compressed air foam system that is difficult to meet the requirements of fire trucks with a mixed liquid flow rate of 10,000 L/min and when the mixed liquid flow rate is small In some cases, there is a problem of deviation in the foam ratio.

To achieve the above object, the technical scheme of the present invention is as follows:

A vehicle-mounted compressed air foam generating system with a flow rate of 10,000 liters, which is special in that it includes a vehicle-mounted control unit, a gas-liquid mixing unit, a large-flow foam unit, a compressed air flow adjustment unit, a water-foam mixing pipeline unit, and a vehicle-mounted water pump The unit and the gas-liquid mixing unit, and the water inlet connected to the vehicle control unit, the first pressure sensor, the foam stock solution inlet, the first flow meter, the second flow meter, the air inlet, the gas flow meter and the gas volume regulating valve;

The input end of the large-flow air supply unit is connected to the external air supply device through the air inlet, and is used to provide air to the large-flow air supply unit; the output end of the large-flow air supply unit passes through the gas flow meter and the gas volume The regulating valve is connected with the compressed air flow regulating unit, the gas flowmeter and the gas volume regulating valve are used to feed back the output of compressed air to the vehicle control unit, and adjust the output of compressed air through the vehicle control unit; the compressed air flow regulation The output end of the unit is connected to the gas input end of the gas-liquid mixing unit for supplying compressed air to the gas-liquid mixing unit; the input end of the large-flow foam unit is connected to an external foam supply device through the foam raw liquid inlet , used to provide foam stock solution to the large-flow foam unit; the output end of the large-flow foam unit is connected to the first input end of the water-foam mixing pipeline unit through the first flowmeter and the second flowmeter, and the vehicle-mounted control unit passes through The first flow meter and the second flow meter adjust the input amount of the foam stock solution entering the water-foam mixing pipeline unit; the second input end of the water-foam mixing pipeline unit is connected with the external water supply device through the water inlet, with To provide water to the water-foam mixing line unit; the output end of the water-foam mixing line unit is connected to the input end of the vehicle-mounted water pump unit, and the output end of the vehicle-mounted water pump unit is connected to the liquid input end of the gas-liquid mixing unit Connect, provide power through the vehicle-mounted water pump unit, so that the mixed liquid in the water-foam mixing pipeline unit is input to the gas-liquid mixing unit; the vehicle-mounted water pump unit is connected with the vehicle-mounted control unit; the gas-liquid mixing unit is used to compress air Inject into the mixed liquid of water and foam to make it foam and output; the first pressure sensor is installed in the gas-liquid mixing unit, and is used to transmit the pressure situation in the gas-liquid mixing unit to the vehicle control unit.

Further, the large-flow foam unit includes a first-flow foam device and a second-flow foam device connected to the foam stock solution inlet, and the first-flow foam device and the second-flow foam device are connected in parallel;

The first foam flow device includes a first filter and a first parallel branch sequentially connected to the foam raw liquid inlet;

The output end of the first parallel branch is connected to the first flowmeter;

The first parallel branch includes two parallel first branches, and the first branch includes a large-flow foam screw pump and a first check valve connected in sequence; the output end of the first filter is connected to the large-flow foam The input end of the screw pump is connected; the output end of the first check valve is connected with the input end of the first flowmeter;

The second foam flow device includes a second filter and a second parallel branch sequentially connected to the foam raw liquid inlet;

The second parallel branch includes two parallel second branches, and the second branch is provided with a small-flow foam screw pump and a second check valve connected in sequence, and the output end of the second filter is connected to the second check valve. The input end of the small-flow foam screw pump is connected, and the output end of the second check valve is connected to the input end of the second flowmeter;

The output ends of the first flow meter and the second flow meter are connected to the first input end of the water-foam mixing line unit through a pneumatic ball valve.

Further, the nominal diameter of the pipeline connecting the first filter, the large-flow foam screw pump, the first check valve and the first flow meter is larger than that connecting the second filter, the small-flow foam screw pump, and the second check valve. Nominal diameter of return valve and second flowmeter piping.

Further, the water-foam mixing pipeline unit includes a water-foam mixer;

The water inlet is connected to the second input end of the water-foam mixer, and the first flow meter and the second flow meter are connected to the first input end of the water-foam mixer through a pneumatic ball valve;

The output end of the water-foam mixer is connected with the vehicle water pump unit.

Further, the vehicle-mounted water pump unit includes a vehicle-mounted fire-fighting water pump, the input end of the vehicle-mounted fire-fighting water pump is connected to the output end of the water-foam mixer, and the output end of the vehicle-mounted fire-fighting water pump is connected to the gas-liquid mixing unit. The liquid input terminal is connected, and the vehicle-mounted fire pump is also connected with the vehicle-mounted control unit;

The gas-liquid mixing unit includes a mixed liquid flowmeter, a gas-liquid mixing device, and a main outlet of the compressed air foam unit;

The liquid input end of the gas-liquid mixing device is connected to the output end of the vehicle-mounted fire pump, and the output end of the gas-liquid mixing device is connected to the general outlet of the compressed air foam unit;

The mixed liquid flow meter is located on the pipeline between the vehicle-mounted fire pump and the gas-liquid mixing device for monitoring the flow of the mixed liquid; between the gas-liquid mixing device and the main outlet of the compressed air foam unit There is a pneumatic butterfly valve on the pipeline, which is used to control the opening or closing of the main outlet of the compressed air foam unit;

The gas input end of the gas-liquid mixing device is connected to the output end of the compressed air flow adjustment unit;

The first pressure sensor is arranged on the gas-liquid mixing device, and is used to feed back the pressure in the gas-liquid mixing device to the vehicle control unit.

Further, the large-flow air supply unit includes an intake throttle valve, a screw air compressor, a second pressure sensor, and a gas buffer tank;

The input end of the intake throttle valve is connected to the air inlet, the output end of the intake throttle valve is connected to the input end of the screw air compressor, and the output end of the screw air compressor is connected to the air inlet. The input end of the buffer tank is connected, and the output end of the gas buffer tank is connected with the input end of the compressed air flow adjustment unit;

The second pressure sensor is located on the pipeline between the screw air compressor and the gas buffer tank; the second pressure sensor and the intake throttle valve form a closed-loop control circuit, and are controlled according to the pressure in the gas buffer tank The amount of compressed air entering the gas buffer tank.

Further, the large-flow air supply unit also includes an air filter, an oil-gas separator and a safety valve;

The air filter is located on the pipeline between the air inlet and the intake throttle valve, the oil-gas separator is located on the pipeline between the second pressure sensor and the screw air compressor, so The safety valve is installed on the gas buffer tank.

Further, the compressed air flow regulating unit includes a one-way valve, and the gas flow meter, the gas volume regulating valve and the one-way valve are connected in sequence;

The input end of the gas flow meter is connected to the output end of the gas buffer tank, and the output end of the one-way valve is connected to the gas input end of the gas-liquid mixing device.

Further, the vehicle control unit includes a CAN communication interface for communicating with external systems.

A method for using a vehicle-mounted compressed air foam generating system based on the above-mentioned 10,000-liter flow rate, which is special in that it includes the following steps:

Step 1, the vehicle-mounted control unit controls the opening of the foam stock solution inlet, so that the foam stock solution enters the large-flow foam unit from the foam stock solution inlet, and at the same time, the vehicle-mounted control unit controls the opening of the water inlet, so that water enters the water-foam mixing pipeline unit from the water inlet;

Step 2: After the foam stock solution passes through the large-flow foam unit, it enters the water-foam mixing pipeline unit through the first flow meter or the second flow meter, and the vehicle-mounted control unit controls the water-foam mixing through the first flow meter or the second flow meter The ratio of foam stock solution and water in the pipeline unit is mixed between 1% and 6% to form a mixed solution;

Step 3, the on-board control unit controls the opening of the air inlet, so that the air enters the large-flow air supply unit from the air inlet;

Step 4, the vehicle-mounted control unit controls the vehicle-mounted water pump unit to start, and the vehicle-mounted water pump unit inputs the mixed liquid of the water-foam mixing pipeline unit into the gas-liquid mixing unit;

Step 5: After the air is compressed by the large-flow air supply unit, it enters the gas-liquid mixing unit through the gas flow meter, the air volume regulating valve and the compressed air flow regulating unit. Adjust to ensure that the volume of air entering the gas-liquid mixing unit is 5-10 times the volume of the mixed liquid;

Step 6: The mixed liquid and compressed air are fully foamed in the gas-liquid mixing unit and then output. During the foaming process of the mixed liquid and compressed air, the first pressure sensor transmits the pressure situation to the vehicle control unit in real time.

Compared with the prior art, the beneficial effects of the present invention are as follows:

(1) The present invention first mixes foam and water to form a mixed liquid, and then injects compressed air into the foam mixed liquid through a gas-liquid mixing device to make it foam, thereby reducing the working pressure of the foam pump.

(2) In the present invention, the first flow foam device and the second flow foam device connected in parallel are arranged in the large flow foam unit, so that the vehicle-mounted compressed air foam generation system can simultaneously meet the use conditions of large flow and small flow.

(3) The present invention can realize precise control of air, water, and foam through flow meters, foam screw pumps, check valves, pneumatic butterfly valves, pneumatic ball valves, and air volume regulating valves, so that the ratio of foam to water is between 1% and 6%. The space and the gas volume are 5-10 times the volume of the mixed liquid.

Description of drawings

Fig. 1 is a schematic diagram of a vehicle-mounted compressed air foam generation system in an embodiment of the present invention.

Fig. 2 is a specific structural diagram of the vehicle-mounted compressed air foam generation system in the embodiment of the present invention.

The marks in the attached drawings are as follows:

1. Water inlet, 2. Water-foam mixer, 3. Vehicle-mounted fire pump, 4. Mixed liquid flow meter, 5. First pressure sensor, 6. Gas-liquid mixing device, 7. Pneumatic butterfly valve, 8. Compressed air foam Unit total outlet, 9, one-way valve, 10, foam stock solution inlet, 11, first filter, 12, second filter, 13, large flow foam screw pump, 14, small flow foam screw pump, 15, first Check valve, 16, second check valve, 17, first flow meter, 18, second flow meter, 19, pneumatic ball valve, 20, air inlet, 21, air filter, 22, air intake throttle valve , 23, screw air compressor, 24, oil-gas separator, 25, second pressure sensor, 26, gas buffer tank, 27, safety valve, 28, gas flow meter, 29, gas volume regulating valve.

Detailed ways

The present invention will be further elaborated below through the accompanying drawings and specific embodiments.

A vehicle-mounted compressed air foam generation system with a flow rate of 10,000 liters, as shown in Figure 1, includes a vehicle-mounted control unit, a large-flow air supply unit, a large-flow foam unit, a compressed air flow adjustment unit, a water-foam mixing pipeline unit, a vehicle-mounted Water pump unit and gas-liquid mixing unit. The dotted line in FIG. 1 represents the transmission route and direction of the control signal of the vehicle control unit.

The vehicle-mounted water pump unit is used to provide power for the mixed liquid obtained by mixing foam and water, so that the mixed liquid can enter the gas-liquid mixing unit, which can be realized by directly driving the fire water pump from the chassis of the fire truck.

The large-flow foam unit uses a combination of a hydraulic motor-driven screw foam pump and a servo motor-driven screw foam pump to control the speed of the screw foam pump according to the flow signal provided by the foam flow meter, thereby accurately controlling the flow of the foam stock solution , to achieve precise control of the mixing ratio.

The large-flow air supply unit adopts a separate diesel engine to drive the screw air compressor, and is equipped with accessories such as a pressure-stabilizing buffer tank. It is independently skidded. The main frame is a box structure and is designed with a wall hook, which can be used as a separate air source vehicle. In use, you only need to quickly connect the compressed air output pipeline behind the gas buffer tank with the gas pipeline.

The water-foam mixing pipeline unit is used to detect the flow rate of the foam mixture in real time and realize the full mixing of the foam liquid and water.

The compressed air flow adjustment unit is used to dynamically adjust the injected amount of compressed air in real time, so that the mixture of foam stock solution and water can fully foam, and the foaming ratio can meet the requirements of use.

The gas-liquid mixing unit is used to achieve uniform mixing of gas-liquid two-phase flow and prevent gas-liquid phase blockage.

The on-board control unit can detect the water flow in real time according to the working status of the on-board water pump unit, so as to dynamically adjust the foam liquid flow and air flow, and realize the precise control of the ratio of compressed air and foam when mixed; especially with CAN communication interface, and It supports all important bus protocols, and can exchange data with the external fire truck chassis control system to realize linkage control between on-board fire fighting devices.

The output end of the on-board control unit is respectively connected with the on-board water pump unit, the input end of the large-flow foam unit and the input end of the large-flow air supply unit. The on-board control unit controls the large-flow foam unit to provide foam stock solution, and the large-flow air supply unit provides compressed air. .

The output end of the large-flow foam unit is connected to the input end of the water-foam mixing pipeline unit, and the foam stock solution and water are sent to the water-foam mixing pipeline unit. The large-flow foam unit sends its output flow to the vehicle control unit in real time. transmission, which is convenient for the vehicle-mounted control unit to control the size of the foam stock solution in real time. The water-foam mixing pipeline unit is also connected to the external water supply device, so that the external water supply device directly supplies water to the inside of the water-foam mixing pipeline unit. The vehicle-mounted control unit controls the foam stock solution and The mixing ratio of water in the water-foam mixing pipeline unit, and make the foam stock solution and water fully mixed. The water-foam mixing pipeline unit mixes the water and the foam stock solution to enter the gas-liquid mixing unit through the on-board water pump unit, and adjusts the supply of compressed air through the compressed air flow adjustment unit to combine the compressed air and water and foam. The mixed liquid is injected into the gas-liquid mixing unit according to a certain ratio to make it foam, and the foamed mixed liquid is finally output outside.

As shown in Figure 2, based on the above functional description, the present invention provides a specific system structure. The large flow air supply unit includes an air filter 21, an intake throttle valve 22, and a screw driven by a diesel engine that are sequentially connected on the pipeline. Type air compressor 23, oil-gas separator 24, first pressure sensor 25 and gas buffer tank 26, safety valve 27 is installed on the gas buffer tank 26, and the input end of air filter 21 is provided with air inlet 20.

The large-flow foam unit includes a foam stock solution inlet 10 and a parallel first flow foam device and a second flow foam device. The first foam flow device includes a first filter 11 communicated with the foam stock solution inlet 10. The first filter 11 is connected to the second flow foam device. The input end of a parallel branch is connected, and the output end of the first parallel branch is connected with the first flow meter 17 . The first parallel branch includes two parallel first branches, and each first branch includes a large-flow foam screw pump 13 and a first check valve 15 connected in sequence, a first filter 11, a large-flow foam screw Both the pump 13 and the first check valve 15 are installed on a pipeline with a nominal diameter of 80, and the first flow meter 17 is installed on a pipeline with a nominal diameter of 65. The second flow foam device includes a second filter 12 connected to the foam stock solution inlet 10 , the second filter 12 is connected to the input end of the second parallel branch, and the output end of the second parallel branch is connected to the second flow meter 18 . The second parallel branch includes two parallel second branches, and each second branch includes a small-flow foam screw pump 14 and a second check valve 16 connected in sequence, and the second filter 12 is connected with the small-flow foam screw pump. The input end of the pump 14 is connected, the output end of the second check valve 16 is connected with the input end of the second flow meter 18, the second filter 12, the small flow foam screw pump 14, the second check valve 16 and the second The flowmeters 18 are all mounted on pipes with a nominal diameter of 20. The water-foam mixing unit includes a water-foam mixer 2, the foam stock solution enters the water-foam mixer 2 through a pneumatic ball valve 19 after being output by the first flowmeter 17 and the second flowmeter 18, and the input end of the water-foam mixer 2 Connected to water inlet 1. The vehicle-mounted water pump unit includes a vehicle-mounted fire-fighting water pump 3, and the gas-liquid mixing unit includes a mixed liquid flowmeter 4, a first pressure sensor 5, a gas-liquid mixing device 6, a pneumatic butterfly valve 7, and a total outlet 8 of a compressed air foam unit, and a water-foam mixer 2 The output end of the vehicle-mounted fire-fighting water pump 3 is connected to the input end of the vehicle-mounted fire-fighting water pump 3. The output end of the vehicle-mounted fire-fighting water pump 3 is connected to the gas-liquid mixing device 6 through the mixed liquid flowmeter 4. The gas buffer tank 26 passes through the gas flowmeter 28 and the gas regulating valve 29 in turn. A compressed air flow regulating unit composed of a one-way valve 9, so that the gas buffer tank 26 is connected to the gas-liquid mixing device 6, and the output end of the gas-liquid mixing device 6 communicates with the total outlet 8 of the compressed air foam unit through the pneumatic butterfly valve 7, the first The pressure sensor 5 is arranged on the gas-liquid mixing device 6 .

When in use, the on-board control unit controls water to enter the water-foam mixer 2 through the water inlet 1, and at the same time, the on-board control unit controls the foam to enter the large flow after passing through the foam stock solution inlet 10 and passing through the first filter 11 and the second filter 12 The foam screw pump 13 and/or the small flow foam screw pump 12 input the foam to the water-foam mixer 2. When the foam enters the water-foam mixer 2, it needs to be monitored by the first flow meter 17 and the second flow meter 18 before entering , the on-board control unit detects the size of the amount of foam entering the water-foam mixer 2 by detecting the data of the first flowmeter 17 and the second flowmeter 18, so that the water and the foam are completely mixed in the water-foam mixer 2, The positive pressure mixing of water and foam before the vehicle-mounted fire-fighting water pump 3 is realized, and the mixed liquid is output to the gas-liquid mixing device 6 through the vehicle-mounted fire-fighting water pump 3, and then output to the gas-liquid mixing device 6 at the vehicle-mounted fire-fighting water pump 3 During the process, the flow of the mixed liquid needs to be monitored by the mixed liquid flow meter 4 to ensure that the quantity of the mixed liquid entering the gas-liquid mixing device 6 corresponds to the volume of the compressed air entering, and the vehicle-mounted control unit controls the air to enter the port through the air inlet 20 After the air is filtered by the air filter 21, it enters the screw air compressor 23 driven by the diesel engine. After the air is compressed by the screw air compressor 23 driven by the diesel engine, the oil contained in the air is removed by the oil-gas separator 24 and then enters The gas buffer tank 26 and the second pressure sensor 25 monitor the pressure in the gas buffer tank 26 in real time. The second pressure sensor 25 and the intake throttle valve 22 form a closed-loop control circuit inside the large flow gas supply unit. The pressure in real time adjusts the flow rate of the air inlet 20, the gas in the gas buffer tank 26 is monitored by the on-board control unit to control the gas flow meter 28 and the gas volume regulating valve 29 is dynamically adjusted, and then enters the gas-liquid mixing device 6 to foam the mixed liquid , the first pressure sensor 5 provided on the gas-liquid mixing device 6 feeds back the pressure data in the gas-liquid mixing device 6 to the on-board control unit in real time, and the on-board control unit controls the high-flow gas supply unit according to the data fed back by the first pressure sensor 5 Compressed air output pressure setting value; after the vehicle-mounted water pump unit is running, the vehicle-mounted control unit controls the pneumatic butterfly valve 7 to open, and the foamed mixed liquid is output through the main outlet 8 of the compressed air foam unit.

If the foamed mixed liquid wants to reach the flow rate of 10,000 liters when it is output, then the flow rate of the foam stock liquid needs to reach 660-600L/min to meet the use requirement of 6% mixing ratio. Therefore, it is necessary to use two rated Foam screw pumps with a flow range of 38-350L/min can only meet the requirements of use when they work in parallel. However, the starting torque of the large-flow foam screw pump is relatively large, and the on-board power supply cannot meet the use requirements. Therefore, a hydraulic motor is used to drive the large flow rate through the on-board control unit. The hydraulic proportional valve in the foam screw pump can realize the speed control of the large-flow foam screw pump driven by the hydraulic motor, and realize the flow adjustment of the foam liquid; at the same time, because the vehicle-mounted compressed air foam unit also needs to take into account the small flow requirements such as fire guns , and a group of small-flow foam screw pumps driven by DC servo motors with a rated flow range of 2-20L/min are connected in parallel, which makes up for the inability of large-flow foam screw pumps to achieve precise adjustment of small flow.

The on-board control unit completes the mixing control of the foam stock solution and water according to the first flow meter 17, the second flow meter 18 and the water inlet 1, and at the same time, according to the current value of the mixed liquid flow meter 4 and the set value of the compressed air addition ratio, first pass The vehicle-mounted control unit sends an operation instruction and a working condition selection instruction to the screw air compressor 23 driven by the diesel engine, and then dynamically controls the air volume regulating valve 29 in real time according to the value detected by the gas flow meter 28, thereby realizing the adjustment of the compressed air injection volume; at the same time , an intake throttle valve 22 is installed at the intake port of the screw air compressor 23 driven by the diesel engine, which together with the second pressure sensor 25 on the compressed air output pipeline constitutes a dynamic closed-loop control loop, according to the set The pressure value can adjust the intake air flow, thereby making up for the defect that the screw air compressor 23 driven by the diesel engine cannot adjust the working state of the air compressor with stepless speed change.

Claims (10)

1. A vehicle-mounted compressed air foam generation system with a flow rate of 10,000 liters, characterized in that it includes a vehicle-mounted control unit, a gas-liquid mixing unit, a large-flow foam unit, a compressed air flow regulating unit, a water-foam mixing pipeline unit, and a vehicle-mounted water pump unit and gas-liquid mixing unit, and the water inlet (1), the first pressure sensor (5), the foam stock solution inlet (10), the first flow meter (17), the second flow meter (18) connected with the vehicle control unit, Air inlet (20), gas flow meter (28) and gas volume regulating valve (29); The input end of the large-flow air supply unit is connected to an external air supply device through the air inlet (20), and is used to provide air to the large-flow air supply unit; the output end of the large-flow air supply unit passes through the gas flow in sequence The meter (28) and the gas volume regulating valve (29) are connected with the compressed air flow regulating unit, and the gas flow meter (28) and the gas volume regulating valve (29) are used to feed back the output volume of the compressed air to the vehicle control unit, and through the vehicle The control unit adjusts the output of compressed air; the output end of the compressed air flow adjustment unit is connected to the gas input end of the gas-liquid mixing unit, and is used to provide compressed air to the gas-liquid mixing unit; the large-flow foam unit The input end of the foam stock solution inlet (10) is connected with the external foam supply device for providing foam stock solution to the large flow foam unit; the output end of the large flow foam unit is passed through the first flowmeter (17) and the second The flowmeter (18) is connected with the first input end of the water-foam mixing pipeline unit, and the vehicle-mounted control unit regulates the flow rate entering the water-foam mixing pipeline unit through the first flowmeter (17) and the second flowmeter (18). The input amount of the foam stock solution; the second input end of the water-foam mixing pipeline unit is connected with the external water supply device through the water inlet (1), and is used to provide water to the water-foam mixing pipeline unit; the water-foam mixing pipeline unit The output end of the mixing pipeline unit is connected to the input end of the vehicle-mounted water pump unit, the output end of the vehicle-mounted water pump unit is connected to the liquid input end of the gas-liquid mixing unit, and the power is provided by the vehicle-mounted water pump unit, so that the water-foam mixing pipeline unit The mixed liquid in the tank is input to the gas-liquid mixing unit; the on-board water pump unit is connected to the on-board control unit; the gas-liquid mixing unit is used to inject compressed air into the mixed liquid of water and foam to make it foam and output it; The first pressure sensor (5) is installed in the gas-liquid mixing unit, and is used to transmit the pressure situation in the gas-liquid mixing unit to the vehicle control unit. 2. A vehicle-mounted compressed air foam generating system with a flow rate of 10,000 liters according to claim 1, characterized in that: the large-flow foam unit includes a first flow foam device and a second flow foam device connected to the foam stock solution inlet (10). Two flow foam devices, the first flow foam device and the second flow foam device are connected in parallel; The first foam flow device includes a first filter (11) and a first parallel branch sequentially connected to the foam stock solution inlet (10); The output end of the first parallel branch is connected to the first flow meter (17); The first parallel branch includes two parallel first branches, and the first branch includes a large-flow foam screw pump (13) and a first check valve (15) connected in sequence; the first filter ( The output end of 11) is connected with the input end of the large-flow foam screw pump (13); the output end of the first check valve (15) is connected with the input end of the first flowmeter (17); The second foam flow device includes a second filter (12) and a second parallel branch sequentially connected to the foam stock solution inlet (10); The second parallel branch includes two parallel second branches, and the small flow foam screw pump (14) and the second check valve (16) connected in sequence are arranged on the second branch, and the second The output end of filter (12) is connected with the input end of small flow foam screw pump (14), and the output end of described second check valve (16) is connected with the input end of second flowmeter (18); The output ends of the first flow meter (17) and the second flow meter (18) are connected to the first input end of the water-foam mixing pipeline unit through a pneumatic ball valve (19). 3. A vehicle-mounted compressed air foam generating system with a flow rate of 10,000 liters according to claim 2, characterized in that: the first filter (11), the large-flow foam screw pump (13), the first non-return The nominal diameter of the valve (15) and the first flow meter (17) pipeline is greater than the connection of the second filter (12), small flow foam screw pump (14), the second check valve (16) and the second flow rate Measure (18) the nominal diameter of the pipe. 4. the vehicle-mounted compressed air foam generation system of a kind of 10,000 liters flow according to claim 2, is characterized in that: The water-foam mixing pipeline unit includes a water-foam mixer (2); The water inlet (1) is connected to the second input end of the water-foam mixer (2), and the first flow meter (17) and the second flow meter (18) pass through a pneumatic ball valve (19) and the The first input end of said water-foam mixer (2) is connected; The output end of the water-foam mixer (2) is connected with the vehicle-mounted water pump unit. 5. the vehicle-mounted compressed air foam generation system of a kind of 10,000-liter flow rate according to claim 4, is characterized in that: The vehicle-mounted water pump unit includes a vehicle-mounted fire-fighting water pump (3), the input end of the vehicle-mounted fire-fighting water pump (3) is connected to the output end of the water-foam mixer (2), and the output of the vehicle-mounted fire-fighting water pump (3) end is connected with the liquid input end of the gas-liquid mixing unit, and the vehicle-mounted fire pump (3) is also connected with the vehicle-mounted control unit; The gas-liquid mixing unit includes a mixed liquid flow meter (4), a gas-liquid mixing device (6), and a compressed air foam unit total outlet (8); The liquid input end of the gas-liquid mixing device (6) is connected to the output end of the vehicle-mounted fire pump (3), and the output end of the gas-liquid mixing device (6) is connected to the general outlet of the compressed air foam unit (8 )connect; The mixed liquid flow meter (4) is located on the pipeline between the vehicle-mounted fire pump (3) and the gas-liquid mixing device (6), and is used to monitor the flow of the mixed liquid; the gas-liquid mixing device (6) ) and the pipeline between the compressed air foam unit total outlet (8) is provided with a pneumatic butterfly valve (7), used to control the switch or closure of the compressed air foam unit total outlet (8); The gas input end of the gas-liquid mixing device (6) is connected with the output end of the compressed air flow regulating unit; The first pressure sensor (5) is arranged on the gas-liquid mixing device (6), and is used to feed back the pressure in the gas-liquid mixing device (6) to the vehicle control unit. 6. A vehicle-mounted compressed air foam generating system according to any one of claims 1-5, characterized in that: The large-flow air supply unit includes an intake throttle valve (22), a screw air compressor (23), a second pressure sensor (25) and a gas buffer tank (26); The input end of the intake throttle valve (22) is connected to the air inlet (20), the output end of the intake throttle valve (22) is connected to the input end of the screw air compressor (23), The output end of the screw air compressor (23) is connected to the input end of the gas buffer tank (26), and the output end of the gas buffer tank (26) is connected to the input end of the compressed air flow regulating unit; The second pressure sensor (25) is located on the pipeline between the screw air compressor (23) and the gas buffer tank (26); the second pressure sensor (25) is connected to the intake throttle valve (22) ) constitute a closed-loop control loop, and control the amount of compressed air entering the gas buffer tank (26) according to the pressure in the gas buffer tank (26). 7. The vehicle-mounted compressed air foam generating system of a flow rate of 10,000 liters according to claim 6, characterized in that: The large-flow air supply unit also includes an air filter (21), an oil-gas separator (24) and a safety valve (27); The air filter (21) is located on the pipeline between the air inlet (20) and the intake throttle valve (22), and the oil-air separator (24) is located on the second pressure sensor (25) And on the pipeline between the screw air compressor (23), the safety valve (27) is installed on the gas buffer tank (26). 8. The vehicle-mounted compressed air foam generating system of a flow rate of 10,000 liters according to claim 5, characterized in that: The compressed air flow regulating unit includes a one-way valve (9), and the gas flowmeter (28), the gas volume regulating valve (29) and the one-way valve (9) are connected in sequence; The input end of the gas flow meter (28) is connected to the output end of the gas buffer tank (26), the output end of the check valve (9) is connected to the gas input end of the gas-liquid mixing device (6) connect. 9. A vehicle-mounted compressed air foam generation system with a flow rate of 10,000 liters according to claim 8, characterized in that: the vehicle-mounted control unit includes a CAN communication interface for communicating with external systems. 10. A method for using the vehicle-mounted compressed air foam generating system of any one of claims 1-9, comprising the steps of: Step 1, the vehicle-mounted control unit controls the opening of the foam stock solution inlet (10), so that the foam stock solution enters the large-flow foam unit from the foam stock solution inlet (10), and at the same time, the vehicle-mounted control unit controls the water inlet (1) to open, so that water flows from the water inlet (10) ) into the water-foam mixing line unit; Step 2: After the foam stock solution passes through the large-flow foam unit, it enters the water-foam mixing pipeline unit through the first flow meter (17) or the second flow meter (18), and the vehicle-mounted control unit passes through the first flow meter (17) or the second flow meter (18). The second flow meter (18) controls the ratio of the foam stock solution and water in the water-foam mixing pipeline unit to be mixed between 1%-6%, to generate a mixed solution; Step 3, the vehicle-mounted control unit controls the opening of the air inlet (20), so that the air enters the large-flow air supply unit from the air inlet (20); Step 4, the vehicle-mounted control unit controls the vehicle-mounted water pump unit to start, and the vehicle-mounted water pump unit inputs the mixed liquid of the water-foam mixing pipeline unit into the gas-liquid mixing unit; Step 5: After the air is compressed by the large-flow air supply unit, it enters the gas-liquid mixing unit through the gas flow meter (28), the air volume regulating valve (29) and the compressed air flow regulating unit, and the vehicle-mounted control unit passes through the gas flow meter (28) Adjust the amount of compressed air with the air volume regulating valve (29) to ensure that the volume of air entering the gas-liquid mixing unit is 5-10 times the volume of the mixed liquid; Step 6: The mixed liquid and compressed air are fully foamed in the gas-liquid mixing unit and then output. During the foaming process of the mixed liquid and compressed air, the first pressure sensor (5) transmits the pressure situation to the vehicle control unit in real time.

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