VEHICLE-MOUNTED LARGE-FLOW FIRE-FIGHTING FOAM FLUID MIXING SYSTEM

Abstract

The present invention discloses a vehicle-mounted large-flow fire-fighting foam fluid mixing system, including a supply kit, a mixing kit, a control kit, and a pipeline kit. The supply kit includes an auxiliary gas supply device, a fire pump, an integrated foam pump, a fire pump main motor, and a coupling. The mixing kit includes a fire monitor interface, a foam generating device, and a fluid mixing device. The control kit includes a foam mixing proportion single-chip microcomputer control system, an alarm module, a power module, an auxiliary air compressor switch module, a frequency converter, and a central control display screen. The pipeline kit includes an air drainage tube, a fire hose, a foam liquid pipe, and a pipeline valve. For the problems of flow fluctuation and low foam foaming efficiency, the present invention optimizes the design and adopts a new control policy, thereby implementing precise mixing under the large-flow condition.

Claims

1. A vehicle-mounted large-flow fire-fighting foam fluid mixing system, comprising a supply kit, a mixing kit, and a pipeline kit, wherein the supply kit is connected to the mixing kit by the pipeline kit; the mixing kit comprises a fire monitor interface (1), a foam generating device (2), and a fluid mixing device (12), wherein a fluid inlet end of the foam generating device (2) is fixedly connected to the fluid mixing device (12), and a fluid outlet end of the foam generating device (2) is fixedly connected to the fire monitor interface (1); the supply kit comprises an auxiliary gas supply device (5), a fire pump main motor (6), a fire pump (8), and an integrated foam pump (10), wherein the fire pump main motor (6) is connected to the fire pump (8) by the coupling (7); the fire pump (8) and the integrated foam pump (10) are respectively connected to the fluid mixing device (12); and the auxiliary gas supply device (5) is fixedly connected to the foam generating device (2).

2. The vehicle-mounted large-flow fire-fighting foam fluid mixing system according to claim 1, further comprising a control kit, wherein the control kit comprises an auxiliary air flow pressure monitoring instrument (4), a fire water flow pressure monitoring instrument (9), a foam liquid flow pressure monitoring instrument (11), a foam mixing proportion single-chip microcomputer control system (13), an alarm module (14), a power module (15), an auxiliary air compressor switch module (16), a frequency converter (17), and a central control display screen (18); and the fire water flow pressure monitoring instrument (9) is disposed between the fire pump (8) and the fluid mixing device (12), and the foam liquid flow pressure monitoring instrument (11) is disposed between the integrated foam pump (10) and the fluid mixing device (12); the alarm module (14), the power module (15), the auxiliary air compressor switch module (16), the frequency converter (17), and the central control display screen (18) are respectively connected to the foam mixing proportion single-chip microcomputer control system (13); the foam mixing proportion single-chip microcomputer control system (13) is provided with a data acquisition module, the data acquisition module is connected to the fire water flow pressure monitoring instrument (9), the foam liquid flow pressure monitoring instrument (11), and the auxiliary air flow pressure monitoring instrument (4) respectively; and the frequency converter (17) includes a plurality of output ports that respectively correspond to power frequencies of the fire pump main motor (6), a motor of the integrated foam pump (10), and a motor of the auxiliary gas supply device (5).

3. The vehicle-mounted large-flow fire-fighting foam fluid mixing system according to claim 1, wherein the foam generating device (2) comprises a variable cross section foam generating tube (2-1), a negative pressure current collector (2-2), a mixture injector (2-3), and a mixture buck elbow (2-4) that are connected in sequence; a fluid outlet end of the variable cross section foam generating tube (2-1) is connected to the fire monitor interface (1); an injector head of the mixture injector (2-3) is buried in a working chamber of the negative pressure current collector (2-2); the fluid mixing device (12) is connected to the mixture buck elbow (2-4); and the auxiliary gas supply device (5) is connected to an inlet pipe at upper part of the negative pressure current collector (2-2).

4. The vehicle-mounted large-flow fire-fighting foam fluid mixing system according to claim 3, wherein a middle narrow mouth of the variable cross section foam generating tube (2-1) is provided with a fine mesh grid plate.

5. The vehicle-mounted large-flow fire-fighting foam fluid mixing system according to claim 3, wherein the pipeline kit comprises an air drainage tube (3); the air drainage tube (3) comprises a high pressure air drainage tube (3-1) and an atmospheric pressure air drainage tube (3-2); the high pressure air drainage tube (3-1) is connected between a left entry of an air inlet end of the negative pressure current collector (2-2) and the auxiliary air flow pressure monitoring instrument (4) and between the auxiliary air flow pressure monitoring instrument (4) and the auxiliary gas supply device (5); and the atmospheric pressure air drainage tube (3-2) is connected to a right entry of the air inlet end of the negative pressure current collector (2-2).

6. The vehicle-mounted large-flow fire-fighting foam fluid mixing system according to claim 3, wherein the pipeline kit comprises a plurality of pipeline valves; a pipeline between the fire water flow pressure monitoring instrument (9) and the fluid mixing device (12) is provided with a pipeline valve; a pipeline between the foam liquid flow pressure monitoring instrument (11) and the fluid mixing device (12) is provided with a pipeline valve; and a pipeline valve is disposed between the right entry of the air inlet end of the negative pressure current collector (2-2) and an end of the atmospheric pressure air drainage tube (3-2), and a pipeline valve is disposed between the left entry of the air inlet end of the negative pressure current collector (2-2) and the auxiliary air flow pressure monitoring instrument (4).

7. The vehicle-mounted large-flow fire-fighting foam fluid mixing system according to claim 1, wherein the fluid mixing device (12) adopts three-dimensional right-angle three-way modeling.

8. The vehicle-mounted large-flow fire-fighting foam fluid mixing system according to claim 2, wherein the foam generating device (2) comprises a variable cross section foam generating tube (2-1), a negative pressure current collector (2-2), a mixture injector (2-3), and a mixture buck elbow (2-4) that are connected in sequence; a fluid outlet end of the variable cross section foam generating tube (2-1) is connected to the fire monitor interface (1); an injector head of the mixture injector (2-3) is buried in a working chamber of the negative pressure current collector (2-2); the fluid mixing device (12) is connected to the mixture buck elbow (2-4); and the auxiliary gas supply device (5) is connected to an inlet pipe at upper part of the negative pressure current collector (2-2).

9. The vehicle-mounted large-flow fire-fighting foam fluid mixing system according to claim 8, wherein a middle narrow mouth of the variable cross section foam generating tube (2-1) is provided with a fine mesh grid plate.

10. The vehicle-mounted large-flow fire-fighting foam fluid mixing system according to claim 8, wherein the pipeline kit comprises an air drainage tube (3); the air drainage tube (3) comprises a high pressure air drainage tube (3-1) and an atmospheric pressure air drainage tube (3-2); the high pressure air drainage tube (3-1) is connected between a left entry of an air inlet end of the negative pressure current collector (2-2) and the auxiliary air flow pressure monitoring instrument (4) and between the auxiliary air flow pressure monitoring instrument (4) and the auxiliary gas supply device (5); and the atmospheric pressure air drainage tube (3-2) is connected to a right entry of the air inlet end of the negative pressure current collector (2-2).

11. The vehicle-mounted large-flow fire-fighting foam fluid mixing system according to claim 8, wherein the pipeline kit comprises a plurality of pipeline valves; a pipeline between the fire water flow pressure monitoring instrument (9) and the fluid mixing device (12) is provided with a pipeline valve; a pipeline between the foam liquid flow pressure monitoring instrument (11) and the fluid mixing device (12) is provided with a pipeline valve; and a pipeline valve is disposed between the right entry of the air inlet end of the negative pressure current collector (2-2) and an end of the atmospheric pressure air drainage tube (3-2), and a pipeline valve is disposed between the left entry of the air inlet end of the negative pressure current collector (2-2) and the auxiliary air flow pressure monitoring instrument (4).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 is a schematic structural diagram of a mechanical part according to the present invention;

[0021] FIG. 2 is a piping diagram of the mechanical part according to the present invention;

[0022] FIG. 3 is a schematic structural diagram of a control kit according to the present invention;

[0023] FIG. 4 is a sectional view of a mixing kit according to the present invention; and

[0024] FIG. 5 is a schematic diagram of a working principle according to the present invention.

[0025] In the figures, 1—fire monitor interface; 2—foam generating device; 2-1—variable cross section foam generating tube; 2-2—negative pressure current collector; 2-3—mixture injector; 2-4—mixture buck elbow; 3—air drainage tube; 3-1—high pressure air drainage tube; 3-2—atmospheric pressure air drainage tube; 4—auxiliary air flow pressure monitoring instrument; 5—auxiliary gas supply device; 6—fire pump main motor; 7—coupling; 8—fire pump; 9—fire water flow pressure monitoring instrument; 10—integrated foam pump; 11—foam liquid flow pressure monitoring instrument; 12—fluid mixing device; 13—foam mixing proportion single-chip microcomputer control system; 14—alarm module; 15—power module; 16—auxiliary air compressor switch module; 17—frequency converter; 18—central control display screen.

DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings.

[0027] As shown in FIG. 1 to FIG. 4, a vehicle-mounted large-flow fire-fighting foam fluid mixing system provided in this embodiment includes a supply kit, a mixing kit, a control kit, and a pipeline kit.

[0028] The mixing kit includes a fire monitor interface 1, a foam generating device 2, and a fluid mixing device 12. The supply kit includes an auxiliary gas supply device 5, a fire pump main motor 6, a coupling 7, a fire pump 8, and an integrated foam pump 10.

[0029] The foam generating device 2 includes a variable cross section foam generating tube 2-1, a negative pressure current collector 2-2, a mixture injector 2-3, and a mixture buck elbow 2-4. The fluid mixing device 12 is connected to the mixture buck elbow 2-4. The mixture buck elbow 2-4 is threaded to the mixture injector 2-3, a tail part of the mixture injector 2-3 is designed with a flange plate, and the flange plate may be fixed at a tail part of the negative pressure current collector 2-2 through a bolt. In this case, an injector head of the mixture injector 2-3 is buried in a working chamber of the negative pressure current collector 2-2. An upper part of the negative pressure current collector 2-2 has an inlet pipe with left and right symmetrical air inlet ends, and the inlet pipe is configured to connect to the air drainage tube 3. The negative pressure current collector 2-2 is fixedly connected to the variable cross section foam generating tube 2-1. A middle narrow mouth of the variable cross section foam generating tube 2-1 is provided with a fine mesh grid plate, welded inside the variable cross section foam generating tube 2-1. The variable cross section foam generating tube 2-1 is fixedly connected to the fire monitor interface 1 through a flange.

[0030] The fire pump main motor 6 is connected to the fire pump 8 through the coupling 7, and provides rotating momentum to the fire pump 8. The fire pump 8 and the integrated foam pump 10 are respectively connected to the fluid mixing device 12. The integrated foam pump 10 includes two parts: a foam liquid power source and a pump group, and foam liquid is injected into water flow at a certain pressure at a place where pressure is lowered in a fire water elbow through the device to complete mixing of the two types of liquid. A fixing system of the auxiliary gas supply device 5, the fire pump 8, and the integrated foam pump 10 is fastened to a chassis of a fire truck through a bolt.

[0031] The pipeline kit includes an air drainage tube 3, a fire hose, a foam liquid pipe, and a pipeline valve. The fire hose is a threaded pipe, and is threaded between a water outlet of the fire pump 8 and the fire water flow pressure monitoring instrument 9 and between the fire water flow pressure monitoring instrument 9 and the fluid mixing device 12, and a fire-fighting water pipeline valve is disposed on the pipeline between the fire water flow pressure monitoring instrument 9 and the fluid mixing device 12. The foam liquid pipe is a threaded pipe, and is threaded between the integrated foam pump 10 and the foam liquid flow pressure monitoring instrument 11 and between the foam liquid flow pressure monitoring instrument 11 and the fluid mixing device 12, and a foam liquid pipeline valve is disposed on the pipeline between the foam liquid flow pressure monitoring instrument 11 and the fluid mixing device 12.

[0032] An auxiliary air flow pressure monitoring instrument 4 is disposed between the auxiliary gas supply device 5 and the air drainage tube 3. The air drainage tube 3 includes a high pressure air drainage tube 3-1 and an atmospheric pressure air drainage tube 3-2. Two ends of the high pressure air drainage tube 3-1 are respectively connected to the foam generating device 2 and the auxiliary gas supply device 5. The atmospheric pressure air drainage tube 3-2 is connected to the auxiliary gas supply device. The air drainage tube 3 is configured to introduce air into the foam generating device 2, to improve foaming efficiency. The atmospheric pressure air drainage tube 3-2 is a common working pipe, and is configured to directly introduce air in the atmosphere into the generating device to complete the foaming work. The high pressure air drainage tube 3-1 is a connecting pipe between the auxiliary gas supply device and the foam generating device that is temporarily used under special requirements.

[0033] The control kit includes an auxiliary air flow pressure monitoring instrument 4, a fire water flow pressure monitoring instrument 9, a foam liquid flow pressure monitoring instrument 11, a foam mixing proportion single-chip microcomputer control system 13, a alarm module 14, a power module 15, an auxiliary air compressor switch module 16, a frequency converter 17, and a central control display screen 18. Data interfaces of the auxiliary air flow pressure monitoring instrument 4, the fire water flow pressure monitoring instrument 9, the foam liquid flow pressure monitoring instrument 11, the alarm module 14, the auxiliary air compressor switch module 16, the frequency converter 17, and the central control display screen 18 are connected to a communication module of the foam mixing proportion single-chip microcomputer control system 13, and the power module 15 is connected to a power supply port of the foam mixing proportion single-chip microcomputer control system 13. The frequency converter 17 includes a plurality of output ports that respectively correspond to power frequencies of the fire pump main motor 6, a motor of the integrated foam pump 10, and a motor of the auxiliary gas supply device 5. The foam mixing proportion single-chip microcomputer control system 13 is provided with a data acquisition module, and the data acquisition module is connected to the fire water flow pressure monitoring instrument 9, the foam liquid flow pressure monitoring instrument 11, and the auxiliary air flow pressure monitoring instrument 4 respectively. The fire water flow pressure monitoring instrument 9 is disposed between the fire pump 8 and the fluid mixing device 12, and the foam liquid flow pressure monitoring instrument 11 is disposed between the integrated foam pump 10 and the fluid mixing device 12.

[0034] According to the above mechanical structure and control scheme of the vehicle-mounted large-flow fire-fighting foam fluid mixing system, the implementation includes the following steps.

[0035] (a) The fixing system of the auxiliary gas supply device 5, the fire pump 8, and the integrated foam pump 10 is first fastened to the chassis of the fire truck through a bolt. The distribution may be appropriately adjusted according to the relationship between the chassis and the equipment.

[0036] (b) The auxiliary air flow pressure monitoring instrument 4 is then connected between the air drainage tube 3 and the auxiliary gas supply device 5 through a flange system. It is noted that a cut-off valve may be disposed on the connecting pipe, and the valve should be fixed between the auxiliary air flow pressure monitoring instrument 4 and the air drainage tube 3.

[0037] (c) The fire water flow pressure monitoring instrument 9 is then connected between the fire pump 8 and the fluid mixing device 12 through a flange system. It is noted that a cut-off valve may be disposed on the connecting pipe, and the valve should be fixed between the fire water flow pressure monitoring instrument 8 and the fluid mixing device 12.

[0038] (d) The foam liquid flow pressure monitoring instrument 11 is then connected between the fluid mixing device 12 and the integrated foam pump 10 through a flange system. It is noted that a cut-off valve may be disposed on the connecting pipe, and the valve should be fixed between the foam liquid flow pressure monitoring instrument 11 and the fluid mixing device 12.

[0039] (e) According to the form in FIG. 4, the mixture buck elbow 2-4 is threaded to the tail end of the mixture injector 2-3, and the two are fixed to the tail end of the negative pressure current collector 2-2 through a flange device at the tail end of the mixture injector 2-3. A nozzle part of the mixture injector 2-3 is buried in the working chamber of the negative pressure current collector 2-2. The above whole is connected to the variable cross section foam generating tube 2-1 through the thread at the front end of the negative pressure current collector 2-2. The above whole is the foam generating device 2, and is connected to the fire monitor interface 1 through welding.

[0040] (f) According to the form in FIG. 1, the fluid mixing device 12 and the foam generating device 2 are connected to the mixture buck elbow 2-4 though a threaded pipe. In this case, attention should be paid to the matching of pipe threads to prevent leakage.

[0041] (g) According to the form in FIG. 1, the air drainage tube 3 is connected to the foam generating device 2 though a threaded pipe. It is noted that a cut-off valve may be disposed on the connecting pipe. In this case, the mechanical part is installed completely.

[0042] (h) Data interfaces of the frequency converter 17, the fire water flow pressure monitoring instrument 9, the foam liquid flow pressure monitoring instrument 11, the auxiliary air flow pressure monitoring instrument 4, the alarm module 14, the central control display screen 18, and the auxiliary air compressor switch module 16 are connected to a communication module of the foam mixing proportion single-chip microcomputer control system 13, and the power module 15 is connected to a power supply port of the foam mixing proportion single-chip microcomputer control system 13, to start the control system. After the initialization is completed, the vehicle-mounted large-flow fire-fighting foam fluid mixing system can implement the working requirements. Through the setting of the central control display screen 18, the system can automatically adjust control parameters, start the relevant pump group to supply liquid/gas, and maintain the stability of the system, to complete the work requirements.

[0043] The foregoing descriptions are merely preferred implementations of the present invention. It should be noted that a person of ordinary skill in the art may further make improvements without departing from the principle of the present invention, and these improvements should be considered as falling within the protection scope of the present invention.