阅读说明：本技术 压缩空气泡沫灭火系统的大流量分段控制机械传动泵组装置 (Large-flow sectional 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：本发明公开一种大流量分段控制机械传动泵组装置,用于安装在车体上的压缩空气泡沫灭火系统或固定式压缩空气泡沫灭火系统模块,装置包括多个泡沫泵、传动组件及与多个泡沫泵一一对应连接的多个离合器,传动组件用于在外部动力系统的转动轴的驱动下启动一个或多个泡沫泵；当任一离合器与传动组件接触,则通过传动组件启动任一离合器对应的泡沫泵。本发明通过控制器控制离合器与传动组件的接触和分离,而控制泡沫泵启动的数量以达到泡沫液流量控制的效果；且通过传动组件以及多个离合器的组合,将外部动力系统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。(The invention discloses a high-flow sectional control mechanical transmission pump unit device which is used for a compressed air foam fire extinguishing system or a fixed compressed air foam fire extinguishing system module arranged on a vehicle body, and comprises a plurality of foam pumps, a transmission assembly and a plurality of clutches, wherein the clutches are connected with the foam pumps in a one-to-one correspondence manner, and the transmission assembly is used for starting one or more foam pumps under the driving of a rotating shaft of an external power system; when any clutch is in contact with the transmission assembly, the foam pump corresponding to any clutch is started through the transmission assembly. The controller controls the clutch to be in contact with and separated from the transmission assembly, and controls the starting number of the foam pumps so as to achieve the effect of controlling the flow of the foam liquid; part of mechanical power output by an external power system is converted into power driven by the foam pump through the combination of the transmission assembly and the clutches, so that the loss of servo current is reduced; the fire extinguishing efficiency is improved.)

1. A high flow segment control mechanical transmission pump unit device, characterized in that, is used for the compressed air foam fire extinguishing system or the fixed compressed air foam fire extinguishing system module installed on the vehicle body, 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 driven by a rotating shaft of an external power system;

the driving pieces are fixedly connected with the foam pumps in a one-to-one correspondence manner; when any driving piece is in contact with the transmission assembly, the foam pump corresponding to any driving piece is started through the transmission assembly.

2. The mass flow segmented control mechanical transmission pump group device according to claim 1, wherein the external power system comprises: the first driving wheel is sleeved on the rotating 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 driving belt to transmit the power of the external power system;

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 driving pieces one by one;

the driving pieces are contacted and separated with the corresponding second transmission gears under the control of the controller so as to adjust the starting number of the foam pumps.

3. The high flow rate segmented control mechanical transmission pump group device according to claim 2, wherein the transmission belt comprises a first transmission belt and a second transmission belt; the device comprises a pump frame; the transmission assembly further includes:

the third driving wheel is rotationally connected with the pump frame and is linked with the first driving wheel through the first driving belt;

and the fourth driving wheel is rotationally connected with the pump frame, the third driving wheel and the fourth driving wheel coaxially rotate, and the fourth driving wheel is linked with the second driving wheel through the second driving belt.

4. The mass flow sectionally controlled mechanical transmission pump group device according to claim 1, wherein the plurality of driving members are respectively multi-plate air clutches.

5. The high flow rate segmented control mechanical transmission pump group device according to claim 1,

the device further comprises: at least one foam concentrate delivery pipe which is communicated with the plurality of foam pumps and a water delivery pipe communicated with the compressed air foam fire extinguishing system;

the at least one foam liquid conveying pipe is provided with a foam liquid flow meter and a foam liquid proportional control valve, and the foam liquid proportional control valve is adjusted according to foam liquid flow data fed back by the foam liquid flow meter under the control of a control assembly so as to adjust the flow of the conveyed foam liquid; and a foam liquid constant pressure control valve is arranged at the joint of the foam pumps and the water conveying pipe, and the foam liquid conveying is in a constant pressure state under the control of the control assembly.

6. A compressed air foam fire suppression system, wherein said system is mounted to a vehicle body, or said system is mounted to a fixed structure or to the ground; the system comprises:

the foam pump assembly comprises the high-flow segmented control mechanical transmission pump set device as claimed in any one of claims 1 to 4, wherein a plurality of foam pumps in the device are externally connected with a foam liquid storage tank and used for conveying foam liquid;

the water supply assembly comprises a fire pump, and the fire pump is externally connected with a water storage tank and is used for conveying water;

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

a mixing assembly connecting the foam pump assembly, the fire pump and the air supply assembly, the mixing assembly for mixing foam concentrate, water and compressed air 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.

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

one end of the first water delivery pipe is connected with the fire pump, and the other end of the first water delivery pipe is externally connected with the water storage tank;

one end of the second water pipe is connected with the fire pump, and the other end of the second water pipe is connected with the mixing assembly;

and the water flow meter is arranged on the second water conveying pipe and is electrically connected with the control assembly.

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

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

one end of the first compressed air conveying pipe is connected with an external 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 8, 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 6, 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 high-flow sectional control mechanical transmission pump set device of a compressed air foam fire extinguishing system.

Background

At present, a traditional fire-fighting foam type war chariot usually uses a 24V power supply system on board to drive a foam liquid supply loop. However, due to the capacity limitation of the vehicle-mounted generator system and the battery system, under the fire-fighting working condition, the existing vehicle-mounted power supply system cannot meet the power demand of the pump set in large flow or full load work, so that the foam liquid supply is interrupted easily in the fire-fighting process, or the current is too large due to the full load work of the pump set, so that the impact is caused on the power supply of the whole vehicle power control system, and the smooth expansion of the fire-fighting rescue work is influenced.

Disclosure of Invention

The embodiment of the invention provides a high-flow sectional control mechanical transmission pump unit device of a compressed air foam fire extinguishing system, which is used for solving the problem that the existing vehicle-mounted power supply system cannot meet the power requirement of a pump unit in high-flow or full-load work, so that a foam pump cannot normally operate in the fire rescue process, and further the fire extinguishing effect is poor.

In order to solve the above technical problems, an aspect of an embodiment of the present invention provides a high flow rate sectional control mechanical transmission pump set apparatus for a compressed air foam fire extinguishing system or a fixed compressed air foam fire extinguishing system module mounted on a vehicle body, 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 driven by a rotating shaft of an external power system;

the driving pieces are fixedly connected with the foam pumps in a one-to-one correspondence manner; when any driving piece is in contact with the transmission assembly, the foam pump corresponding to any driving piece is started through the transmission assembly.

Optionally, the external power system comprises: the first driving wheel is sleeved on the rotating 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 driving belt to transmit the power of the external power system;

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 driving pieces one by one;

the driving pieces are contacted and separated with the corresponding second transmission gears under the control of the controller so as to adjust the starting number of the foam pumps.

Optionally, the drive belt comprises a first drive belt and a second drive belt; the device comprises a pump frame; the transmission assembly further includes:

the third driving wheel is rotationally connected with the pump frame and is linked with the first driving wheel through the first driving belt;

and the fourth driving wheel is rotationally connected with the pump frame, the third driving wheel and the fourth driving wheel coaxially rotate, and the fourth driving wheel is linked with the second driving wheel through the second driving belt.

Optionally, the plurality of driving members are each a multi-plate air clutch.

Optionally, the apparatus further comprises: at least one foam concentrate delivery pipe which is communicated with the plurality of foam pumps and a water delivery pipe communicated with the compressed air foam fire extinguishing system;

the at least one foam liquid conveying pipe is provided with a foam liquid flow meter and a foam liquid proportional control valve, and the foam liquid proportional control valve is adjusted according to foam liquid flow data fed back by the foam liquid flow meter under the control of a control assembly so as to adjust the flow of the conveyed foam liquid; and a foam liquid constant pressure control valve is arranged at the joint of the foam pumps and the water conveying pipe, and the foam liquid conveying is in a constant pressure state under the control of the control assembly.

Yet another aspect of an embodiment of the present invention provides a compressed air foam fire suppression system, the system being mounted to a vehicle body, or the system being mounted to a fixed structure or to the ground; the system comprises:

the foam pump assembly comprises the high-flow sectional control mechanical transmission pump set device, and a plurality of foam pumps in the device are externally connected with a foam liquid storage tank and used for conveying foam liquid;

the water supply assembly comprises a fire pump, and the fire pump is externally connected with a water storage tank and is used for conveying water;

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

a mixing assembly connecting the foam pump assembly, the fire pump and the air supply assembly, the mixing assembly for mixing foam concentrate, water and compressed air 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 water supply assembly comprises:

one end of the first water delivery pipe is connected with the fire pump, and the other end of the first water delivery pipe is externally connected with the water storage tank;

one end of the second water pipe is connected with the fire pump, and the other end of the second water pipe is connected with the mixing assembly;

and the water flow meter is arranged on the second water conveying pipe and is electrically connected with the control assembly.

Optionally, the gas supply assembly further comprises:

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

one end of the first compressed air conveying pipe is connected with an external 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 is arranged on the second compressed air delivery pipe, and the compressed air proportional control valve is electrically connected with 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 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 an external power system is converted into power driven by the foam pump through the combination of the transmission assembly and the driving pieces, so that the problem that a plurality of pump groups need to rely on high-flow servo current when being started is solved, the plurality of 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; 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.

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 high-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 high 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 view of a compressed air foam fire suppression system according to an embodiment of the present invention;

figure 9 is an exploded view of the structure of a compressed air foam fire suppression system of 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. 1-9, the embodiment of the present invention provides a high flow rate sectional control mechanical transmission pump set device for a compressed air foam fire extinguishing system or a fixed compressed air foam fire extinguishing system module installed on a vehicle body; a fixed compressed air foam fire extinguishing system module is understood to mean, among other things, a compressed air foam fire extinguishing system which is placed stationary relative to the ground or a stationary structure which is standing, such as a building structure which does not move. The device comprises: the foam pump comprises a pump frame 24 and a plurality of foam pumps 21, wherein the plurality of foam pumps 21 are arranged on the pump frame 24, and foam liquid storage tanks are externally connected to the plurality of foam pumps 21 and used for conveying foam liquid; a transmission assembly for activating one or more of the plurality of foam pumps 21 under the drive of the rotating shaft 80 of the external power system. Wherein, the external power system can be a vehicle power system, and the external power system can also be a power system in a fixed compressed air foam fire extinguishing system module. The transmission assembly is arranged between the plurality of foam pumps 21 and a rotating shaft 80 of an external power system; the driving pieces are fixedly connected with the foam pumps 21 in a one-to-one correspondence manner; when any driving member is in contact with the transmission assembly, the foam pump 21 corresponding to any driving member is started through the transmission assembly. Wherein, pump rack 24 includes roof 1, bottom plate 2 and support 6, and one side of roof 1 is connected to support 6 one end, and one side of bottom plate 2 is connected to the support 6 other end. 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 an exemplary embodiment, the external power system includes: a first driving wheel (not shown) sleeved on the rotating shaft; in order to conveniently use the power of the rotating shaft 80 of the external power system as the driving power of the foam pump 21, correspondingly, the transmission assembly comprises: a tank body disposed on the pump frame 24; the second driving wheel 63 is sleeved and fixed on the main shaft of the box body, and the second driving wheel 63 is rotationally connected to the box body; the second driving wheel 63 is linked with the first driving wheel through a driving belt so as to transmit the power of the external power system; the first transmission gear 4 is sleeved and fixed with 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 driving pieces one by one; the plurality of driving members are brought into and out of contact with the corresponding second transmission gears 5 under the control of a controller (not shown) to adjust the number of starts of the foam pump. 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 63 is mounted to the box panel 15 by a mounting 16. The mounting members 16 may be bolts.

The transmission belt comprises a first transmission belt (not shown) and a first transmission belt (not shown) in order to transmit the power of the vehicle body according to the rotating speed of the vehicle body; the transmission assembly further includes: the third transmission wheel 61 is rotationally connected with the pump frame 24, and the third transmission wheel 61 is linked with the first transmission wheel through the first transmission belt; the fourth transmission wheel 62 is rotatably connected to the pump frame 24, the third transmission wheel 61 and the fourth transmission wheel 62 coaxially rotate, and the fourth transmission wheel 62 is linked with the second transmission wheel 63 through the second transmission belt; the first transmission belt is wound between the first transmission wheel and the third transmission wheel 61; the second transmission belt is wound between the second transmission wheel 63 and the fourth transmission wheel 62. In this embodiment, the rotating shaft 80 of the external power system drives the third driving wheel 61 to rotate through the first driving belt, the third driving wheel 61 drives the coaxial fourth driving wheel 62 to rotate, and then drives the second driving wheel 63 to rotate through the second driving belt, so that the corresponding number of foam pumps 21 obtain power.

In the exemplary embodiment, the plurality of 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, the plurality of foam pumps 21 may be provided as three foam pumps 21, each of the three foam pumps 21 being a progressive cavity pump using 80L/min.

For example, the apparatus further comprises: and at least one foam concentrate delivery pipe which is communicated with the plurality of foam pumps 21 and the water delivery pipe of the compressed air foam fire extinguishing system. Each foam pump 21 is connected with a water delivery pipe of the compressed air foam fire extinguishing system through at least two foam liquid delivery pipes and is externally connected with a foam liquid storage tank through the corresponding foam pump 21. 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 driving members one to one, the plurality of support plates 12 are used for placing corresponding driving members, each driving member is connected to the corresponding second flange 9 through the corresponding transmission key 13, the plurality of second flanges 9 correspond to the plurality of driving members one to one, the plurality of second flanges 9 correspond 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 third flanges 11 and the plurality of second transmission gears 5 correspond one to one.

In order to realize the purpose of balancing pressure of foam concentrate delivery, the at least one foam concentrate delivery pipe is provided with a foam concentrate flowmeter 23 and a foam concentrate proportional control valve 27, and under the control of a control component 70, the foam concentrate proportional control valve 27 is adjusted according to foam concentrate flow data fed back by the foam concentrate flowmeter 23 so as to adjust the flow rate of the delivered foam concentrate; and foam liquid balance control valves 28 are arranged at the joints of the foam pumps 21 and the water conveying pipes, and the foam liquid conveying is in a balance pressure state under the control of the control components. The device adjusts the flow of the foam liquid which is transmitted into the water pipe 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. In the present example, a finer mixture ratio and a finer change in the foam concentrate flow rate can be achieved by using the foam concentrate flowmeter 23, the foam concentrate proportional control valve 27, and the foam concentrate balance control valve 28 in combination.

For example, when the mixed liquor demand of a compressed air foam fire extinguishing system is 3600L/min of compressed air foam fire extinguishing agent, 6% of foam concentrate supply is required, i.e. the foam concentrate demand is: 3600L/min 6% ═ 216L/min, 3 sets of 80L/min screw pumps were used as the foam concentrate supply system. When the rotating shaft 80 of the vehicle power system is driven, 8kw of force is mechanically taken from the rotating shaft 80 of the vehicle power system on the chassis of the vehicle body through a transmission assembly of the device, and then three 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 device including three multi-plate air clutches as an example, the controller controls the contact and separation between each multi-plate air clutch 3 and the corresponding second transmission gear 5 according to actual requirements. When the demand is less than 80L/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 80L/min-160L/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 160L/min-240L/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 flowmeter 23 in the foam concentrate conveying pipe, and the controller adjusts the flow of the foam concentrate finally output to the compressed air foam fire extinguishing system according to the detection result.

In the embodiment, the device can control the contact and separation of each driving piece and the transmission assembly through the controller, so that the starting number of the foam pumps 21 is controlled to achieve the effect of controlling the flow of the foam liquid in a segmented manner; part of mechanical power output by a power shaft of the fire engine is converted into power driven by the foam pumps 21 through the combination of the transmission assembly and the plurality of driving pieces, so that the problem that a plurality of pump groups need to rely on high-flow servo current when being started is solved, the plurality of foam pump 21 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 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.

As shown in fig. 3 to 9, embodiments of the present invention provide a compressed air foam fire extinguishing system which may be installed in a vehicle or which may be installed in a fixed structure or on the ground. In an exemplary embodiment, the apparatus connects a rotating shaft 80 of a vehicle powertrain of a vehicle and a vehicle power line, which has a voltage of 24V. The compressed air foam fire suppression system includes: frame 10, foam pump assembly 20, water supply assembly 30, mixing assembly 50, and control assembly 70; the foam pump assembly 20 is arranged in the frame 10, the foam pump assembly 20 comprises a large-flow sectional 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, and the fire pump 31 is externally connected with a water storage tank and used for delivering water; the air supply assembly 40 is arranged in the rack 10, the air supply assembly 40 is externally connected with an air compressor (not shown in the figure) and an air compressor externally connected with the air compressor, and the air compressor is connected with an air storage tank and used for transmitting compressed air (not shown in the figure), namely the air compressor is an external air compressor relative to the system; a mixing assembly 50 is disposed in the housing 10, the mixing assembly 50 connecting the foam pump assembly 20, the fire pump 31 and the air compressor, the mixing assembly 50 for mixing foam, water and compressed air to generate a compressed air foam fire suppressant; an outlet 52 is arranged on the mixing component 50; a control assembly 70, said control assembly 70 electrically connecting said foam pump assembly 20, said water supply assembly 30 and said air supply assembly 40.

In an exemplary embodiment, the water supply assembly 30 includes: a first water pipe 32, a second water pipe 33 and a water flow meter 34, wherein one end of the first water pipe 32 is connected to the fire pump 31, and the other end of the first water pipe 32 is externally connected to the water storage tank (not shown); one end of the second water pipe 33 is connected with the fire pump 31, and the other end of the second water pipe 33 is connected with the mixing assembly 50; the water flow meter 34 is disposed on the second water pipe 33, and the water flow meter 34 is electrically connected to the control unit 70. The water flow meter 34 measures the flow of water delivered by the fire pump 31 to the mixing assembly 50, and the control assembly 70 controls the flow of water delivered by the fire pump 31 into the mixing assembly 50 according to the real-time flow data of water fed back by the flow meter. When the control component 70 detects that the pressure of the second water pipe 33 is too high or receives that the real-time flow data of the water fed back by the flow meter is larger, the flow of the water output by the fire pump 31 can be controlled through the control component 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 first foam concentrate delivery pipe 22, one end of the first foam concentrate delivery pipe 22 being externally connected to a foam concentrate storage tank, and the other end of the first foam concentrate delivery pipe 22 being connected to one end of the 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 33; the second foam liquid delivery pipe 26 is provided with a foam liquid flow meter 23, a foam liquid proportional control valve 27 and a foam liquid balance control valve 28, 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 to the control assembly 70. Adjusting the flow of the foam liquid mixed with the waterway and transmitted to the second water transmission pipe 33 through the control component 70 according to the foam liquid flow data fed back by the foam liquid flowmeter 23; and the purpose of balancing the pressure of foam liquid delivery is realized through a foam balancing pressure proportional valve 28. 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 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; one end of the first compressed air conveying pipe 42 is connected with the air compressor, 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 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.

In order to improve the reliability of the use of the device, in the exemplary embodiment, the second compressed air delivery pipe 43 is provided with a compressed air proportional control valve 44 and an air flow meter 45, and the compressed air proportional control valve 44 and the air flow meter 45 are electrically connected to the control assembly 70. The control component 70 is used for controlling the opening state of the compressed air proportional control valve 44 according to the flow data of the compressed air fed back by the air flow meter 45 so as to adjust the flow of the transmitted compressed air; the device has high automation degree and good fire extinguishing effect.

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 33; 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). Wherein, the fire monitor subassembly can be foam gun or fire monitor. The control assembly 70 may also include a display control panel 71 and an electrical box 72. Wherein the display control panel 71 comprises a number of buttons which control the compressed air foam fire extinguishing system. The electric box 72 is electrically connected with the air compressor, the fire pump 31, the fire monitor assembly, the foam pump 21, the display control panel 71, the water flow meter 34, the foam liquid flow meter 23 and the compressed air proportional control valve 44 respectively. The display control panel 71 is used for displaying the on-off state of various valves in the fire extinguishing system, the flow and pressure of water in the second water conveying pipe 33, the flow of foam in the foam concentrate conveying pipe and other information and operation 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.