阅读说明：本技术 压缩空气泡沫灭火系统的小流量分段控制机械传动泵组装置 (Small-flow segmented control mechanical transmission pump set device of compressed air foam fire extinguishing system ) 是由 陆兆勇 于 2021-08-27 设计创作，主要内容包括：本发明公开一种小流量分段控制机械传动泵组装置,用于压缩空气泡沫灭火系统,压缩空气泡沫灭火系统外接有动力源,动力源包括动力源主轴,装置包括：多个泡沫泵、传动组件及与多个泡沫泵一一对应的多个第一驱动件,传动组件用于在动力源的驱动下,启动一个或多个泡沫泵；当任一第一驱动件与传动组件接触,则通过传动组件启动任一第一驱动件对应的泡沫泵。本发明通过控制第一驱动件与传动组件的接触和分离,从而控制泡沫泵启动的数量以达到泡沫液流量控制的效果；通过控制器、传动组件与多个第一驱动件的组合,将动力源主轴输出的部分机械动力转化为泡沫泵驱动的动力,减少伺服电流的损耗；提高灭火效率,装置自动化程度高。(The invention discloses a small-flow sectional control mechanical transmission pump set device, which is used for a compressed air foam fire extinguishing system, wherein the compressed air foam fire extinguishing system is externally connected with a power source, the power source comprises a power source main shaft, and the device comprises: the foam pump system comprises a plurality of foam pumps, a transmission assembly and a plurality of first driving pieces in one-to-one correspondence with the foam pumps, wherein the transmission assembly is used for starting one or more foam pumps under the driving of a power source; when any first driving piece is contacted with the transmission assembly, the foam pump corresponding to any first driving piece is started through the transmission assembly. According to the invention, the contact and separation of the first driving piece and the transmission assembly are controlled, so that the starting number of the foam pumps is controlled to achieve the effect of controlling the flow of the foam liquid; through the combination of the controller, the transmission assembly and the plurality of first driving pieces, part of mechanical power output by the power source main shaft is converted into power driven by the foam pump, so that the loss of servo current is reduced; improve the fire extinguishing efficiency and ensure high automation degree of the device.)

1. A small flow segment control mechanical transmission pump set device, characterized in that, it is used for compressed air foam fire extinguishing system, the compressed air foam fire extinguishing system includes power source, the device includes:

the foam pumps are externally connected with foam liquid storage tanks and used for conveying foam liquid;

a transmission assembly for activating one or more of the plurality of foam pumps under the drive of the power source;

the first driving pieces are fixedly connected with the foam pumps in a one-to-one correspondence manner; and

and the controller is used for pneumatically controlling the position movement of each first driving piece so as to control the contact and separation of each first driving piece and the transmission assembly, and further starting the foam pump corresponding to any first driving piece.

2. The small flow segment control mechanical transmission pump set assembly of claim 1, wherein the power source comprises: the first transmission wheel is sleeved on the power source main shaft; correspondingly, the transmission assembly comprises:

the second driving wheel is sleeved and fixed on the main shaft of the box body and is in rotary connection with the box body, and the second driving wheel is linked with the first driving wheel through a first driving belt so as to transmit the power of the power source;

the first transmission gear is sleeved and fixed on the main shaft of the box body and is rotatably connected with the box body;

the plurality of second transmission gears are rotatably connected to the box body, the adjacent first transmission gears are meshed with the second transmission gears, and the adjacent second transmission gears are meshed with each other; the plurality of second transmission gears correspond to the plurality of first driving pieces one by one.

3. The small flow sectionally controlled mechanical transmission pump group device according to claim 1, wherein the plurality of first driving pieces are respectively multi-plate air clutches.

4. A compressed air foam fire suppression system, said system comprising:

a power source for powering the system;

a foam pump assembly, which comprises the small-flow segmented control mechanical transmission pump set device as claimed in any one of claims 1 to 3, wherein a plurality of foam pumps in the device are externally connected with a foam liquid storage tank for conveying foam liquid;

the water supply assembly comprises a fire pump, the fire pump is externally connected with a water storage tank, and the power source main shaft is connected with the fire pump to provide power for the fire pump;

the air supply assembly comprises an air compressor, the air compressor is externally connected with an air storage tank, and the air compressor is used for conveying compressed air;

a mixing assembly connecting the foam pump assembly, the fire pump and the air compressor, the mixing assembly for mixing foam concentrate, water and compressed gas to generate and output a compressed air foam fire suppressant;

a control assembly electrically connected to the foam pump assembly, the water supply assembly and the air supply assembly.

5. The compressed air foam fire suppression system of claim 4, further comprising:

the third driving wheel is rotationally connected with the frame, the power source spindle penetrates through the third driving wheel, and a gap is formed between the peripheral surface of the power source spindle and the third driving wheel;

the fourth driving wheel is connected with the air compressor;

the second transmission belt is wound on the third transmission wheel and the fourth transmission wheel; and

the second driving piece is arranged on the power source spindle, and the control assembly is connected with the second driving piece and controls the contact and separation between the second driving piece and the third driving wheel so as to control the opening and closing of the air compressor.

6. The compressed air foam fire suppression system of claim 5, wherein said water supply assembly comprises:

at least one water pipe, wherein the at least one water pipe is communicated with the fire pump and the mixing assembly;

the water flow meter is arranged on the water conveying pipe close to the mixing component in the at least one water conveying pipe and is electrically connected with the control component; and

and the water flow proportion control valve is arranged on the water conveying pipe far away from the mixing component in the at least one water conveying pipe and is electrically connected with the control component.

7. The compressed air foam fire suppression system of claim 5, wherein said foam pump assembly comprises:

the first end of the foam liquid shunting storage tank is externally connected with a foam liquid storage tank;

one end of the first foam concentrate conveying pipe is connected with the second end of the foam concentrate shunting storage tank, and the other end of the first foam concentrate conveying pipe is connected with one end of the plurality of foam pumps;

one end of the second foam concentrate conveying pipe is connected with the other ends of the foam pumps, and the other end of the second foam concentrate conveying pipe is connected with the second water conveying pipe; a foam liquid flow meter, a foam liquid proportional control valve and a foam liquid balance control valve are arranged on the second foam liquid conveying pipe, and the foam liquid flow meter, the foam liquid proportional control valve and the foam liquid balance control valve are electrically connected with the control assembly; and

and one end of the third foam liquid conveying pipe is connected with the other end of the second foam liquid conveying pipe, and the other end of the third foam liquid conveying pipe is connected with the third end of the foam liquid shunt storage tank.

8. The compressed air foam fire suppression system of claim 5, wherein said air supply assembly further comprises:

the heat exchanger is used for cooling the compressed air transmitted by the air compressor;

one end of the first compressed air conveying pipe is connected with the air compressor, and the other end of the first compressed air conveying pipe is connected with the heat exchanger; and

at least one second compressed air delivery pipe connecting the heat exchanger and the mixing assembly.

9. A compressed air foam fire suppression system according to claim 7, wherein said second compressed air delivery pipe is provided with a compressed air proportional control valve and an air flow meter, said compressed air proportional control valve and said air flow meter being electrically connected to said control assembly.

10. The compressed air foam fire suppression system of claim 5, wherein said mixing assembly comprises:

a mixer connecting the at least one second compressed air delivery pipe and the second water delivery pipe; and

the fire extinguishing agent conveyer pipe, fire extinguishing agent conveyer pipe one end is connected the blender, fire extinguishing agent conveyer pipe one end is provided with the export.

Technical Field

The embodiment of the invention relates to the technical field of fire fighting, in particular to a small-flow sectional control mechanical transmission pump set device of a compressed air foam fire extinguishing system.

Background

At present, due to the capacity limitation of a generator system and a battery system, under the fire-fighting working condition, the existing generator system and the existing power supply system cannot meet the power demand of a pump set in the self flow range for full-load work, and the condition of foam supply interruption easily occurs in the fire-fighting process, so that the smooth expansion of fire-fighting rescue work is influenced.

Disclosure of Invention

The embodiment of the invention provides a small-flow sectional control mechanical transmission pump unit device of a compressed air foam fire extinguishing system, which is used for solving the problems that the conventional generator system and a power supply system cannot meet the power requirement of the pump unit for full-load work within the flow range of the conventional generator system and the conventional power supply system easily causes foam liquid supply interruption in the fire fighting process, so that a foam pump cannot normally run in the fire fighting and rescue process, the fire fighting and rescue work is influenced, and the fire fighting effect is poor.

In order to solve the above technical problems, an aspect of an embodiment of the present invention provides a small-flow sectionally-controlled mechanical transmission pump set apparatus for a compressed air foam fire extinguishing system including a power source, the apparatus including:

the foam pumps are externally connected with foam liquid storage tanks and used for conveying foam liquid;

a transmission assembly for activating one or more of the plurality of foam pumps under the drive of the power source;

the first driving pieces are fixedly connected with the foam pumps in a one-to-one correspondence manner; and

and the controller is used for pneumatically controlling the position movement of each first driving piece so as to control the contact and separation of each first driving piece and the transmission assembly, and further starting the foam pump corresponding to any first driving piece.

Optionally, the power source comprises: the first transmission wheel is sleeved on the power source main shaft; correspondingly, the transmission assembly comprises:

the second driving wheel is sleeved and fixed on the main shaft of the box body and is in rotary connection with the box body, and the second driving wheel is linked with the first driving wheel through a first driving belt so as to transmit the power of the power source;

the first transmission gear is sleeved and fixed on the main shaft of the box body and is rotatably connected with the box body;

the plurality of second transmission gears are rotatably connected to the box body, the adjacent first transmission gears are meshed with the second transmission gears, and the adjacent second transmission gears are meshed with each other; the plurality of second transmission gears correspond to the plurality of first driving pieces one by one.

Optionally, each of the plurality of first drivers is a multi-plate air clutch.

Yet another aspect of an embodiment of the present invention provides a compressed air foam fire suppression system, the system comprising:

a power source for powering the system;

a foam pump assembly, which comprises the small-flow segmented control mechanical transmission pump set device as claimed in any one of claims 1 to 3, wherein a plurality of foam pumps in the device are externally connected with a foam liquid storage tank for conveying foam liquid;

the water supply assembly comprises a fire pump, the fire pump is externally connected with a water storage tank, and the power source main shaft is connected with the fire pump to provide power for the fire pump;

the air supply assembly comprises an air compressor, the air compressor is externally connected with an air storage tank, and the air compressor is used for conveying compressed air;

a mixing assembly connecting the foam pump assembly, the fire pump and the air compressor, the mixing assembly for mixing foam concentrate, water and compressed gas to generate and output a compressed air foam fire suppressant;

a control assembly electrically connected to the foam pump assembly, the water supply assembly and the air supply assembly.

Optionally, the system further comprises:

the third driving wheel is rotationally connected with the frame, the power source spindle penetrates through the third driving wheel, and a gap is formed between the peripheral surface of the power source spindle and the third driving wheel;

the fourth driving wheel is connected with the air compressor;

the second transmission belt is wound on the third transmission wheel and the fourth transmission wheel; and

the second driving piece is arranged on the power source spindle, and the control assembly is connected with the second driving piece and controls the contact and separation between the second driving piece and the third driving wheel so as to control the opening and closing of the air compressor.

Optionally, the water supply assembly comprises:

at least one water pipe, wherein the at least one water pipe is communicated with the fire pump and the mixing assembly;

the water flow meter is arranged on the water conveying pipe close to the mixing component in the at least one water conveying pipe and is electrically connected with the control component; and

and the water flow proportion control valve is arranged on the water conveying pipe far away from the mixing component in the at least one water conveying pipe and is electrically connected with the control component.

Optionally, the foam pump assembly comprises:

the first end of the foam liquid shunting storage tank is externally connected with a foam liquid storage tank;

one end of the first foam concentrate conveying pipe is connected with the second end of the foam concentrate shunting storage tank, and the other end of the first foam concentrate conveying pipe is connected with one end of the plurality of foam pumps;

one end of the second foam concentrate conveying pipe is connected with the other ends of the foam pumps, and the other end of the second foam concentrate conveying pipe is connected with the second water conveying pipe; a foam liquid flow meter, a foam liquid proportional control valve and a foam liquid balance control valve are arranged on the second foam liquid conveying pipe, and the foam liquid flow meter, the foam liquid proportional control valve and the foam liquid balance control valve are electrically connected with the control assembly; and

and one end of the third foam liquid conveying pipe is connected with the other end of the second foam liquid conveying pipe, and the other end of the third foam liquid conveying pipe is connected with the third end of the foam liquid shunt storage tank.

Optionally, the gas supply assembly further comprises:

the heat exchanger is used for cooling the compressed air transmitted by the air compressor;

one end of the first compressed air conveying pipe is connected with the air compressor, and the other end of the first compressed air conveying pipe is connected with the heat exchanger; and

at least one second compressed air delivery pipe connecting the heat exchanger and the mixing assembly.

Optionally, a compressed air proportional control valve and an air flow meter are arranged on the second compressed air delivery pipe, and the compressed air proportional control valve and the air flow meter are electrically connected to the control assembly.

Optionally, the mixing assembly comprises:

a mixer connecting the at least one second compressed air delivery pipe and the second water delivery pipe; and

the fire extinguishing agent conveyer pipe, fire extinguishing agent conveyer pipe one end is connected the blender, fire extinguishing agent conveyer pipe one end is provided with the export.

The embodiment of the invention has the following beneficial effects: the device can control the contact and separation of the first driving piece and the transmission assembly through the controller, so that the starting number of the foam pumps is controlled to achieve the effect of controlling the flow of the foam liquid; part of mechanical power output by the power source is converted into power driven by the foam pump through the combination of the transmission assembly and the first driving pieces, so that the multiple foam pump groups do not need to be supported by large servo current to operate simultaneously, and the loss of the servo current is reduced; the practicability of the simultaneous operation of a plurality of foam pumps is improved; thereby ensuring the working stability of the compressed air foam fire extinguishing system applying the device and ensuring the normal fire rescue work; the device has high automation degree.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is an exploded view of the overall structure of a flow segmented control mechanical transmission pump set device according to an embodiment of the invention;

FIG. 2 is a sectional control schematic diagram of a flow sectional control mechanical transmission pump set device according to an embodiment of the invention;

FIG. 3 is a first angled configuration of a compressed air foam fire suppression system according to an embodiment of the present invention;

FIG. 4 is a second angled configuration of a compressed air foam fire suppression system according to an embodiment of the present invention;

FIG. 5 is a third angle schematic view of a compressed air foam fire suppression system according to an embodiment of the present invention;

FIG. 6 is a fourth angle schematic of a compressed air foam fire suppression system according to an embodiment of the present invention;

FIG. 7 is a fifth angle schematic of a compressed air foam fire suppression system according to an embodiment of the present invention;

FIG. 8 is a sixth angle schematic of a compressed air foam fire suppression system according to an embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

As shown in fig. 1 to 8, the embodiment of the present invention provides a small flow sectionally controlled mechanical transmission pump set device for a compressed air foam fire extinguishing system, which can be used as an independent operating module in the compressed air foam fire extinguishing system. The compressed air foam fire suppression system includes a power source including a power source spindle. The device comprises: the foam pumps 21 are arranged on the pump frame 24, and foam liquid storage tanks are externally connected to the foam pumps 21 and used for conveying foam liquid; a transmission assembly for activating one or more of the plurality of foam pumps under the drive of the power source; the transmission assembly is arranged between the plurality of foam pumps 21 and the power source spindle; the first driving pieces are fixedly connected with the foam pumps 21 in a one-to-one correspondence manner; and a controller (not shown) for pneumatically controlling the position movement of each first driving member to control the contact and separation of each first driving member and the transmission assembly, so as to start the foam pump corresponding to any first driving member. Wherein, the external power source is an external diesel engine. The pump frame 24 comprises a top plate 1, a bottom plate 2 and a support 6, wherein one end of the support 6 is connected with one side of the top plate 1, and the other end of the support 6 is connected with one side of the bottom plate 2. Each foam pump 21 is mounted between one side of the top plate 1 and one side of the bottom plate 2 by means of a bracket 6 and a clamp 7 cooperating with the bracket 6. The pump head of each foam pump 21 is fixedly mounted on a pump frame 24 by means of a first flange 8.

In order to conveniently use the power of a power source spindle as the driving power of the foam pump 21, the power source comprises a first driving wheel 63 which is sleeved on the power source spindle; correspondingly, the transmission assembly comprises: a tank body disposed on the pump frame 24; the second driving wheel 61 is sleeved on and fixed to the spindle of the box body, the second driving wheel 61 is rotatably connected with the box body, and the second driving wheel 61 is linked with the first driving wheel 63 through a first driving belt (not shown) to transmit the power of the power source; the first transmission gear 4 is sleeved and fixed on the main shaft of the box body and is rotatably connected with the box body; the plurality of second transmission gears 5 are rotatably connected to the box body, the adjacent first transmission gears 4 are meshed with the second transmission gears 5, and the adjacent second transmission gears 5 are meshed with each other; the plurality of second transmission gears 5 correspond to the plurality of first driving members one to one. The plurality of first driving members are contacted and separated with the corresponding second transmission gears 5 under the control of the controller to adjust the starting number of the foam pumps. The box body comprises a box body 14 and a box panel 15, wherein the box panel 15 is connected to the box body 14, and the box body 14 is connected with the other side of the top plate 1 and the other side of the bottom plate 2. The second drive wheel 61 is mounted to the box panel 15 by a mounting 16. The mounting members 16 may be bolts.

In an exemplary embodiment, the first drivers are each a multiplate air clutch 3. The device is still including air feed jar 25, air feed jar 25 connect a plurality of multi-plate air clutch 3 and the controller, controller control air feed jar 25 is to a plurality of multi-plate air clutch 3 air supplies to realize a plurality of multi-plate air clutch 3 and transmission assembly's contact and separation.

Illustratively, each of the plurality of foam pumps 21 is a 3-pack 60L/min progressive cavity pump.

For example, each foam pump 21 is connected to the mixing assembly 50 of the compressed air foam fire suppression system and to an external foam concentrate storage tank by at least two foam concentrate delivery pipes. It should be noted that each foam pump 21 is independent, and each foam pump 21 may be connected to different foam liquid storage tanks, and different types of foam liquids are stored in the different foam liquid storage tanks, for example: a type A foam concentrate and a type B foam concentrate; the operator can conveniently select to connect different foam concentrate storage tanks according to different fires so as to form different types of compressed air foam extinguishing agents by means of the device, and the applicability is high.

In an exemplary embodiment, the device includes a plurality of support plates 12, a plurality of transmission keys 13, a plurality of second flanges 9, and a plurality of third flanges 11, the plurality of support plates 12, the plurality of transmission keys 13, the plurality of second flanges 9, and the plurality of third flanges 11 correspond to the plurality of multi-plate air clutches 3 one to one, the plurality of support plates 12 are used for placing the corresponding multi-plate air clutches 3, each multi-plate air clutch 3 is connected to the corresponding second flange 9 through the corresponding transmission key 13, the plurality of second flanges 9 are connected to the plurality of third flanges 11 one to one, and the plurality of third flanges 11 are mounted on the box body 14. The plurality of second flanges 9 and the plurality of second transmission gears 5 are connected in a one-to-one correspondence.

For example, when the foam concentrate demand of a compressed air foam fire suppression system is 800L/min of compressed air foam fire suppressant, 3% of the foam concentrate supply needs to be used, i.e. the foam concentrate demand is: 800L/min 3% ═ 24L/min, 2 sets of 20L/min screw pumps were used as the foam supply system. When the power source main shaft is driven, power is mechanically extracted from the power source main shaft of the compressed air foam fire extinguishing system through a transmission assembly of the device, and then two foam pumps 21 are started to provide foam liquid for the compressed air foam fire extinguishing system. The device is adopted to drive a corresponding number of foam pumps 21 according to requirements, and in a compressed air foam fire extinguishing system, the power requirements of the valves and the PLC are controlled not to exceed 10A.

The specific working process is as follows: referring to fig. 2, taking the example that the device includes three multi-plate air clutches, a small flow segmented control foam pump is realized, in the present embodiment, the small flow can be considered as a flow below 60L/min. And controlling the contact and the separation between each clutch and the corresponding second transmission gear 5 through a controller according to actual requirements. When the demand is less than 20L/min, controlling the clutch FZ1 to be put into operation, namely controlling the clutch FZ1 to be in contact with the corresponding second transmission gear 5, so as to start the foam pump 21 corresponding to the clutch FZ 1; when the demand is 20L/min-40L/min, the clutches FZ1 and FZ2 are put into operation, namely the clutches FZ1 and FZ2 are controlled to be respectively contacted with the corresponding second transmission gears 5, so that the foam pump 21 corresponding to the starting clutch FZ1 and the foam pump 21 corresponding to the starting clutch FZ2 are started; when the demand is 40L/min-60L/min, the clutches FZ1, FZ2 and FZ3 are put into operation; that is, the clutch FZ1, the clutch FZ2, and the clutch FZ3 are respectively controlled to be in contact with the respective second transmission gears 5, thereby activating the foam pump 21 corresponding to the clutch FZ1, the foam pump 21 corresponding to the clutch FZ2, and the foam pump 21 corresponding to the clutch FZ 3. After the corresponding number of foam pumps 21 are started, the foam concentrate output by the corresponding number of foam pumps 21 passes through the liquid collecting pipe, and is detected by the foam concentrate proportional control valve 27 and the foam concentrate flow meter 23 of the compressed air foam fire extinguishing system, and the controller adjusts the flow rate of the foam concentrate finally output to the mixing assembly 50 of the compressed air foam fire extinguishing system according to the detection result.

The device in the embodiment can control the contact and separation of the multi-plate air clutch 3 and the transmission assembly through the controller, thereby controlling the starting number of the foam pumps 21 to achieve the effect of foam liquid flow control; part of mechanical power output by the power source main shaft is converted into power driven by the foam pumps 21 through the combination of the transmission assembly and the plurality of multi-plate air clutches 3, so that the plurality of foam pumps 21 are supported to run simultaneously without large servo current, and the loss of the servo current is reduced; the practicability of the simultaneous operation of a plurality of foam pumps 21 is improved; and then guarantee to utilize the stability of the compressed air foam fire extinguishing system work of device, guarantee to carry out fire rescue work normally. The device has high automation degree.

As shown in fig. 3 to 7, an embodiment of the present invention provides a compressed air foam fire extinguishing system, the system includes a power source, the power source is used for providing power for the system, the power source includes a power source spindle, and the compressed air foam fire extinguishing system further includes: a frame 10, a foam pump assembly 20, a water supply assembly 30, a gas supply assembly 40, a mixing assembly 50, and a control assembly 70; a foam pump assembly 20 is arranged in the frame 10, the foam pump assembly 20 comprises a flow subsection control mechanical transmission pump set device as described above, and a plurality of foam pumps 21 in the device are externally connected with a foam liquid storage tank for conveying foam liquid; the water supply assembly 30 is arranged in the frame 10, the water supply assembly 30 comprises a fire pump 31, the fire pump 31 is externally connected with a water storage tank, and an external power source spindle is connected with the fire pump 31 to provide power for the fire pump 31; the air supply assembly 40 comprises an air compressor 45, wherein the air compressor 45 is externally connected with an air storage tank, and the air compressor is used for conveying compressed air; a mixing assembly 50 is disposed within the housing 10, the mixing assembly 50 being connected to the foam pump assembly 20, the fire pump 31 and the air compressor 45, the mixing assembly 50 being configured to mix foam concentrate, water and compressed gas to produce and output a compressed air foam fire suppressant; an outlet 52 is arranged on the mixing component 50; control assembly 70 the control assembly 70 is electrically connected to the foam pump assembly 20, the water supply assembly 30 and the air supply assembly 40. Wherein the fire pump 31 is a high pressure fire pump. A power source main shaft of the external power source is mounted on the frame 10 through a bearing seat.

In order to realize that different working conditions are selected according to different fires to extinguish a fire, the applicability of the system is improved. The system further comprises: a third transmission wheel 62 rotatably connected to the frame 10, wherein the power source spindle passes through the third transmission wheel 62, and a gap is formed between the outer peripheral surface of the power source spindle and the third transmission wheel 62; a fourth driving wheel 64 connected with the air compressor 45; a second belt (not shown) wound around the third and fourth driving wheels 64; and a second driving member disposed on the power source spindle, wherein the control component 70 is connected to the second driving member and controls the contact and separation between the second driving member and the third driving wheel 62, so as to control the on/off of the air compressor 45. Wherein the second driving member is a driving clutch. When the compressed air foam extinguishing agent needs to be output, the fire pump 31, the air compressor 45 and the foam pump 21 are driven to be started simultaneously by the power source through the contact between the second driving piece and the third driving wheel 62, so that the compressed air foam extinguishing agent is generated. When foam mixed liquid is required to be output, the fire pump 31 and the foam pump 21 are driven to start simultaneously through separation between the second driving piece and the third driving wheel 62 during power source driving, and the air compressor 45 is not started, so that the air compressor 45 is prevented from idling, the air compressor 45 is effectively protected, and the air compressor 45 is prevented from being damaged due to idling.

In an exemplary embodiment, the water supply assembly 30 includes: at least one water duct 32, said at least one water duct 32 communicating with said fire pump 31 and with said mixing assembly 50; a water flow meter 33 disposed on the water pipe 32 close to the mixing component 50 in the at least one water pipe 32, wherein the water flow meter 33 is electrically connected to the control component 70; and a water flow ratio control valve 34 disposed on the water pipe 32 of the at least one water pipe 32 far from the mixing component 50, wherein the water flow ratio control valve 34 is electrically connected to the control component 70. The at least one water pipe 32 comprises a first water pipe and a second water pipe, one end of the first water pipe is connected with the fire pump 31, and the other end of the first water pipe is externally connected with the water storage tank; the second water pipe is a water pipe 32 close to the mixing component 50, one end of the second water pipe is connected with the fire pump 31, and the other end of the second water pipe is connected with the mixing component 50. The water flow meter 33 is disposed on the second water pipe, the water proportional control valve 34 is disposed on the first water pipe, the water flow meter 33 measures the water flow transmitted from the fire pump 31 to the mixing assembly 50, and the control assembly 70 controls the water flow transmitted from the fire pump 31 to the mixing assembly 50 according to the real-time water flow data fed back by the flow meter. When the control assembly 70 detects that the pressure of the second water delivery pipe is too large or receives that the real-time flow data of water fed back by the flow meter is large, the flow of water output by the fire pump 31 can be controlled through the control assembly 70, so that the effect of limiting the flow and the pressure is achieved; the system has high automation degree.

In an exemplary embodiment, the foam pump assembly 20 includes: a foam liquid diversion storage tank 29, wherein a first end of the foam liquid diversion storage tank 29 is externally connected with a foam liquid storage tank; a first foam concentrate transport pipe 22, one end of said first foam concentrate transport pipe 22 being connected to a second end of said foam concentrate split storage tank 29, the other end of said first foam concentrate transport pipe 22 being connected to one end of said plurality of foam pumps 21; a second foam concentrate delivery pipe 26, one end of the second foam concentrate delivery pipe 26 being connected to the other ends of the plurality of foam pumps 21, and the other end of the second foam concentrate delivery pipe 26 being connected to the second water delivery pipe; a foam liquid flow meter 23, a foam liquid proportional control valve 27 and a foam liquid balance control valve 28 are arranged on the second foam liquid conveying pipe 26, and the foam liquid flow meter 23, the foam liquid proportional control valve 27 and the foam liquid balance control valve 28 are electrically connected with the control assembly 70; and a third foam concentrate transport pipe 200, one end of the third foam concentrate transport pipe 200 being connected to the other end of the second foam concentrate transport pipe 26, the other end of the third foam concentrate transport pipe 200 being connected to a third end of the foam concentrate split storage tank 29. The device adjusts the flow of the foam liquid which is transmitted into the water pipe 32 and mixed with the waterway according to the foam liquid flow data fed back by the foam liquid flowmeter 23 through the control component 70; and the purpose of balancing the pressure of foam liquid delivery is realized through a foam balancing pressure proportional valve 28. When the system is in an inoperative condition, the foam concentrate delivered by foam pump 21 toward mixing assembly 50 may flow back through the third foam concentrate delivery line 200 to foam concentrate storage tank 29 for storage if it does not enter mixing assembly 50 for mixing. In the present example, a finer mixture ratio and foam flow rate change can be achieved by the combined use of the foam concentrate flowmeter 23, the foam concentrate proportional control valve 27, and the foam concentrate balance control valve 28.

The foam liquid flow meter 23 measures the flow rate of the foam liquid transmitted by the foam pump 21 to the mixing assembly 50, and the control assembly 70 controls the opening angle of the foam liquid proportional control valve 27 according to the real-time flow rate data of the foam liquid fed back by the foam liquid flow meter 23, so as to control the flow rate of the foam liquid transmitted by the foam pump 21 to the mixing assembly 50. In this embodiment, the system adjusts the flow rate of the delivered foam concentrate by control component 70 based on foam concentrate flow data fed back by foam concentrate flow meter 23. Finer mix ratios and foam flow variations can be achieved by the foam pump assembly 20. The gas supply assembly 40 further includes: the system comprises a heat exchanger 41, a first compressed air conveying pipe 42 and at least one second compressed air conveying pipe 43, wherein the heat exchanger 41 is used for cooling the compressed air transmitted by the air compressor 45; one end of the first compressed air conveying pipe 42 is connected with the air compressor 45, and the other end of the first compressed air conveying pipe 42 is connected with the heat exchanger 41; the at least one second compressed air duct 43 connects the heat exchanger 41 and the mixing assembly 50. When the air compressor 45 transmits compressed air to the compressed air foam fire extinguishing system, the compressed air enters the heat exchanger 41 through the first compressed air conveying pipe 42, and the temperature of the compressed air is adjusted through the heat exchanger 41; the conditioned compressed air passes through the second compressed air duct 43 and enters the mixing unit 50 from the heat exchanger 41.

To improve the reliability of the use of the device, in the exemplary embodiment, a compressed air proportional control valve 44 is provided on the first compressed air delivery pipe 42, the compressed air proportional control valve 44 being electrically connected to the control assembly 70. An air flow meter 46 is arranged on the second compressed air delivery pipe 43, and the air flow meter 46 is electrically connected with the control assembly 70. The control component 70 controls the opening and closing of the compressed air proportional control valve 44 according to the real-time flow data of the compressed air fed back by the air flow meter 46 so as to adjust the flow of the transmitted compressed air.

In an exemplary embodiment, the mixing assembly 50 includes: a mixer 51 and a fire extinguishing agent delivery pipe 53, said mixer 51 connecting said at least one second compressed air delivery pipe 43 and said second water delivery pipe; one end of the fire extinguishing agent conveying pipe 53 is connected with the mixer 51, and one end of the fire extinguishing agent conveying pipe 53 is provided with the outlet 52. In the exemplary embodiment, the mass of compressed air fire suppressant foam produced by the apparatus is related to the diameter of the tube of the fire suppressant delivery tube 53 of the apparatus.

In order to improve the convenience of the operation of the device, the compressed air foam fire extinguishing system is externally connected with a fire monitor assembly (not shown). The control assembly 70 may also include a display control panel and an electrical box. Wherein the display control panel comprises a plurality of buttons, the plurality of buttons being capable of controlling the compressed air foam fire extinguishing system. The electric box is respectively and electrically connected with the air compressor 45, the fire pump 31, the fire monitor assembly, the foam pump 21, the display control panel, the water flow meter 33, the foam liquid flow meter 23 and the compressed air proportional control valve 44. The display control panel is used for displaying the opening and closing states of various valves in the fire extinguishing system, the flow and pressure of water in the second water conveying pipe, the flow of foam in the foam liquid conveying pipe and other information and running states.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.