Class-A foam fire extinguishing teaching platform

Abstract

The utility model provides a class-A foam fire extinguishing teaching platform which comprises a mechanical pneumatic system, the mechanical pneumatic system comprises a fire monitor, a fire pump, a foam pump, an air compressor, an oil storage tank capable of being connected with the air compressor, a liquid storage tank for storing water and / or foam and a transmission system, and the above components are connected through pipelines. A plurality of interfaces, a pump body and a control valve are connected to the pipeline; the control system comprises a control console and a plurality of sensors and measuring meters, the sensors and the measuring meters are arranged on the mechanical pneumatic system and connected with the control console, and the control console can sense and display working conditions and measurement data of the sensors and the measuring meters. According to the invention, multiple fault points can be set at the same time, firefighters check the fault points one by one according to phenomena and repair the fault points, and a better teaching effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of teaching equipment, and in particular to a Class A foam fire extinguishing teaching platform. Background Art

[0002] With the development of the economy and the progress of society, higher requirements are placed on firefighting and rescue. Class A foam fire trucks will form a fire-fighting combat unit with other vehicles, and at the rescue site, Class A foam fire trucks will be closest to the fire source. If a Class A foam fire truck fails, it will be difficult to withdraw from the forefront of the fire and replace it with other vehicles. Therefore, this puts higher requirements on the reliability of Class A foam fire trucks, and the Class A foam system is the main component of Class A foam fire trucks. If a simple failure occurs in the Class A foam system, if the firefighters can handle these common problems on the spot, the trouble of replacing vehicles can be avoided.

[0003] Therefore, in order to improve firefighters' understanding of the Class A foam system, it is necessary to provide firefighters with targeted teaching and training on the Class A foam system, and in order to enhance firefighters' handling capabilities, it is necessary to provide firefighters with on-site troubleshooting teaching. However, the Class A foam system is located in the pump room of the Class A foam fire truck, which has limited space, and the layout of various components is relatively compact and not easy to observe. Frequent manual disconnection or cutting off of the Class A foam system also causes certain damage to the Class A foam system. Therefore, a platform that is convenient for teaching and training on the Class A foam system is needed. Utility Model Content

[0004] A technical problem to be solved by the present disclosure is that the current teaching venues for Class A foam fire extinguishing platforms are limited and frequent artificial disconnection or artificial cutting of the Class A foam system also causes certain damage to the Class A foam system.

[0005] In order to solve the above technical problems, the present disclosure provides a Class A foam fire extinguishing teaching platform, including:

[0006] A mechanical pneumatic system, the mechanical pneumatic system comprising a fire monitor, a fire pump, a foam pump, an air compressor, an oil storage tank that can be connected to the air compressor, a liquid storage tank for storing water and / or foam, and a transmission system, wherein the fire monitor, the fire pump, the foam pump, the air compressor, the oil storage tank, the liquid storage tank, and the transmission system are connected by pipelines, and the pipelines are provided with a plurality of interfaces, a pump body, and a control valve; and

[0007] A control system includes a console and a plurality of sensors and meters arranged on the mechanical pneumatic system and connected to the console, wherein the console can sense and display the working conditions and measurement data of the sensors and meters.

[0008] In some embodiments, the control system further comprises a plurality of operating switches for each component, and the plurality of operating switches and control valves are electrically connected to the control console.

[0009] In some embodiments, the transmission system includes a motor, the motor is coaxially connected to an intermediate support assembly, and the intermediate support assembly is sequentially connected to the air compressor and the fire pump shaft;

[0010] The output shaft of the motor is connected with a universal joint and a telescopic joint oil seal in sequence; the two sides of the intermediate support assembly are respectively connected with universal joints, the intermediate support assembly is provided with a grease filling hole, and a telescopic joint oil seal is provided on the other side of the universal joint on the side of the intermediate support assembly close to the air compressor; the two sides of the air compressor are respectively connected with universal joints, and a telescopic joint oil seal is provided on the other side of the universal joint on the side of the air compressor close to the fire pump; the fire pump is also provided with a universal joint on the side close to the air compressor.

[0011] In some embodiments, a liquid level sensor / liquid level meter for measuring the liquid level in the liquid storage tank is disposed in the liquid storage tank.

[0012] In some embodiments, the liquid storage tank is connected to a water injection pipeline, and the input and output of the water injection pipeline are connected to an external water injection ball valve;

[0013] An overflow pipe is provided in the liquid storage tank, the bottom of which is close to the bottom of the liquid storage tank, the top of which extends out of the liquid storage tank, and the top of which is connected to an overflow cap for closing the overflow pipe;

[0014] A sewage outlet is arranged at the bottom of the liquid storage tank, and the sewage outlet is connected to a sewage discharge solenoid valve for controlling the opening and closing of the sewage outlet.

[0015] In some embodiments, the liquid storage tank is provided with a water outlet pipe for supplying water to the fire pump;

[0016] The fire pump is connected to a foam outlet pipe, and the foam outlet pipe is sequentially connected with a pneumatic valve head, a flow sensor and a one-way valve from one end close to the fire pump to the end far from the fire pump, wherein the measurement data of the flow sensor can be transmitted to the control console.

[0017] In some embodiments, the fire monitor is provided with a rotating motor and a pitching motor capable of providing power for the liquid column flowing in the fire monitor.

[0018] In some embodiments, the foam pump is provided with a foam suction outlet.

[0019] In some embodiments, the Class A foam fire extinguishing teaching platform also includes a cooler, and a cooling water pipeline is provided between the air compressor and the cooler.

[0020] In some embodiments, the mechanical pneumatic system further comprises an air filter end, and the air filter end is connected to the air compressor.

[0021] Through the above technical scheme, the present invention provides a Class A foam fire extinguishing system, which can effectively enhance the firefighters' ability to troubleshoot the Class A foam fire extinguishing system by artificially setting some mechanical faults such as broken wires and blockages in the mechanical pneumatic system, and changing various types of fault points such as the working status of sensors and measuring meters through console settings. It is also convenient to verify the firefighters' ability to handle faults, and provide support for subsequent professional skills and professional title evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a structural schematic diagram of an implementation method of a Class A foam fire extinguishing teaching platform disclosed in an embodiment of the present disclosure;

[0024] Figure 2 yes Figure 1 A schematic diagram of the partially enlarged structure of part A;

[0025] Figure 3 It is a partial structural schematic diagram of an implementation mode of the transmission system disclosed in the embodiment of the present disclosure;

[0026] Figure 4 It is a structural schematic diagram of an implementation mode of a water storage tank disclosed in an embodiment of the present disclosure;

[0027] Figure 5 yes Figure 4 A schematic structural diagram of the disclosed water storage tank from another perspective;

[0028] Figure 6 yes Figure 4 A schematic structural diagram of the disclosed water storage tank from another perspective;

[0029] Figure 7 It is a structural schematic diagram of an implementation mode of the foam liquid outlet pipe disclosed in the embodiment of the present disclosure;

[0030] Figure 8 It is a structural schematic diagram of an implementation mode of a pitch motor and a selection motor disclosed in an embodiment of the present disclosure;

[0031] Fig. 9 yes Figure 1 A schematic diagram of the partial structure of a disclosed Class A foam fire extinguishing teaching platform from another perspective;

[0032] Fig.10 yes Fig. 9 A schematic diagram of the partially enlarged structure of part B;

[0033] Fig.11 yes Fig. 9 Schematic diagram of the local enlarged structure of part C in the middle.

[0034] Description of reference numerals:

[0035] 100, transmission system; 110, motor; 120, intermediate support assembly; 130, universal joint; 140, expansion joint oil seal; 200, liquid storage tank; 210, liquid level sensor; 220, liquid level gauge; 230, water injection pipeline; 240, external water injection ball valve; 250, overflow pipe; 260, overflow cap; 270, sewage discharge solenoid valve; 280, water outlet pipe; 300, air compressor; 400, oil storage tank; 500, foam pump; 510, foam external suction port; 600, fire pump; 610, foam outlet pipe; 620, pneumatic valve head; 630, flow sensor; 640, one-way valve; 700, fire monitor; 710, rotating motor; 720, pitch motor; 800, cooler; 810, cooling water pipeline. DETAILED DESCRIPTION

[0036] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0037] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0038] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0039] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0040] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0041] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0042] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0043] like Figure 1-11 As shown, the present disclosure provides a Class A foam fire extinguishing teaching platform, comprising:

[0044] A mechanical pneumatic system, the mechanical pneumatic system includes a fire monitor 700, a fire pump 600, a foam pump 500, an air compressor 300, an oil storage tank 400 that can be connected to the air compressor 300, a liquid storage tank 200 for storing water and / or foam, and a transmission system 100. The fire monitor 700, the fire pump 600, the foam pump 500, the air compressor 300, the oil storage tank 400, the liquid storage tank 200, and the transmission system 100 are connected by pipelines, and a plurality of interfaces, a pump body, and a control valve are provided on the pipelines; and

[0045] The control system includes a control console and a plurality of sensors and meters arranged on the mechanical pneumatic system and connected to the control console. The control console can sense and display the working conditions and measurement data of the sensors and meters.

[0046] As a preferred embodiment, each component is arranged on the same base, the transmission system 100 is located on one side of the base, the liquid storage tank 200 is located in the middle of the base, and the automatic foam control system composed of the fire monitor 700, the fire pump 600, the foam pump 500, the air compressor 300, the oil storage tank 400 and the control system is located on the other side of the base. Among them, the fire monitor 700, the fire pump 600, the foam pump 500, the air compressor 300, the oil storage tank 400, and the liquid storage tank 200 are connected to each other through multiple pipelines, and multiple interfaces, pump bodies and control valves are also arranged on each pipeline. The operating switches of these components are electrically connected to the control console, the interface, the pump body, the sensor and the meter. The console has a comprehensive monitoring function, which can obtain the working status of each position, especially the working status and measurement data of the above-mentioned sensors, meters and control valves, outlet pressure, speed, flow rate, liquid remaining amount, etc., and control buttons are arranged on both sides of the console, which can quickly query the system operation / maintenance guide, troubleshooting prompts, fault records and maintenance prompts and other information. The above components and the built-in controller of the console communicate and control the display screen of the console through the CAN2.0 protocol. Therefore, during the teaching process, the lines can be reversed or not connected in advance to create a phenomenon where the signals are different and the corresponding operations cannot be performed. At the same time, a test interface should be reserved on the CAN instrument to enable firefighters to troubleshoot and judge the faults.

[0047] Of course, the various functions of the Class A foam fire extinguishing teaching platform disclosed in the present invention can not only perform automatic fire extinguishing operations through the above-mentioned electronic control system, but also support manual mode, which can be handled manually by firefighters, further improving the firefighters' understanding of the Class A foam fire extinguishing system and their ability to handle emergencies. Specifically, the water discharge mode allows operators to complete the water discharge operation step by step according to the conventional method, and also allows the electronic control system to control the water discharge key on the console to achieve one-step water discharge.

[0048] In some embodiments, a protective cover is provided on the outer cover of the transmission system 100, and the transmission system 100 includes a motor 110 disposed in the protective cover and an intermediate support assembly 120 coaxially transmitted with the motor 110, the intermediate support assembly 120 is disposed on a bracket, and the output shaft of the motor 110 is sequentially connected to a universal joint 130 and a telescopic joint oil seal 140, the telescopic joint oil seal 140 is connected to shaft one, the other end of shaft one is connected to the universal joint 130, and the other end of the universal joint 130 is connected to the intermediate support assembly 120.

[0049] On the side of the intermediate support assembly 120 away from the motor 110, the air compressor 300 and the fire pump 600 are connected by shaft transmission. Specifically, a universal joint 130 is also connected to the side of the intermediate support assembly 120 away from the motor 110. The side of the universal joint 130 away from the intermediate support assembly 120 is connected to a telescopic joint oil seal 140, and the side of the telescopic joint oil seal 140 away from the universal joint 130 is connected to shaft two. The universal joint 130 is connected to one end of shaft two away from the intermediate support assembly 120, and the other side of the universal joint 130 is connected to shaft three. A pulley is provided on shaft three, and a belt is mounted on the pulley. The other end of the belt is mounted on another pulley connected to the shaft transmission for the air compressor 300, and the air compressor 300 is powered by the transmission of the two pulleys and the belt. The end of shaft three away from the middle support assembly 120 is also connected to a universal joint 130, and the end of the universal joint 130 away from shaft three is connected to a telescopic joint oil seal 140, and shaft four is connected to the side of the telescopic joint oil seal 140 away from the universal joint 130. Another universal joint 130 is provided at the end of shaft four away from the telescopic joint oil seal 140, and the other end of the universal joint 130 is connected to the input shaft of the fire pump 600.

[0050] The direct connections between the output shaft of the motor 110, shaft one, shaft two, shaft three and shaft four all require a large amount of lubricating oil, so the intermediate support assembly 120 is provided with a grease filling hole. When this part lacks lubricating oil, an abnormal noise will be emitted. Therefore, during the teaching process, the amount of grease filling can be artificially reduced, so that the firefighters can find and judge the fault point based on the abnormal noise, and then add grease to eliminate the abnormal noise.

[0051] Furthermore, a large number of telescopic oil-saving seals 140 are used in the shaft transmission process. Therefore, during the teaching process, a failed telescopic oil-saving seal 140 can be replaced in advance, and then the firefighters can observe and determine the fault point according to the actual phenomenon in the shaft transmission process, and then replace the telescopic oil-saving seal 140.

[0052] In some embodiments, the liquid storage tank 200 is used to store foam or water, and therefore a liquid level sensor 210 or a liquid level meter 220 for measuring the liquid level in the liquid storage tank 200 is provided in the liquid storage tank 200. Preferably, the liquid level meter 220 uses a float level meter 220. Therefore, during the teaching process, the liquid level in the console display interface is not displayed or a fault point where a liquid level sensor 210 fault is prompted can be created by unplugging the quick-connect plug of the liquid level display or replacing a faulty liquid level meter 220 in advance, so that the firefighters can observe and determine the fault point, and then maintain the line or replace the liquid level sensor 210 / liquid level meter 220.

[0053] In some embodiments, the liquid storage tank 200 is connected to a water injection pipeline 230, and the input end of the water injection pipeline 230 is connected to an external water injection ball valve 240. During the teaching process, an external water injection ball valve 240 can be replaced in advance to create a phenomenon of slow water injection speed or inability to inject water. Then the firefighters observe and determine the fault point, and then replace the water injection valve.

[0054] In some embodiments, an overflow pipe 250 is disposed in the liquid storage tank 200, the bottom of which is close to the liquid storage tank 200, the top of which extends out of the liquid storage tank, and the top of the overflow pipe 250 is connected to an overflow cap 260 for closing the overflow pipe 250. Therefore, during the teaching process, a blockage can be added to the overflow pipe 250 in advance, or a damaged overflow cap 260 can be replaced to create a phenomenon of overflow, so that firefighters can observe and determine the fault point, and then remove the blockage or replace the overflow cap 260.

[0055] In some embodiments, a sewage outlet is provided at the bottom of the liquid storage tank 200, and the sewage outlet is connected to a sewage solenoid valve 270 that controls the opening and closing of the sewage outlet. Therefore, during the teaching process, the circuit of the solenoid valve can be cut off in advance or a faulty solenoid valve can be replaced to create a phenomenon of slow sewage discharge or failure to discharge sewage. Firefighters can judge and troubleshoot the fault point based on the phenomenon and then replace the sewage solenoid valve 270.

[0056] In some embodiments, the liquid storage tank 200 is provided with a water outlet pipe 280 capable of supplying water to the fire pump 600. Therefore, a blockage may be added to the water outlet pipe 280 in advance to prevent water from flowing out or to cause slow water flow, thereby causing insufficient water supply at the fire pump 600 or the console displaying a lack of water and a low water pressure alarm. Firefighters then determine and troubleshoot the fault point based on the phenomenon and remove the blockage.

[0057] In some embodiments, the fire pump 600 is connected to a foam outlet pipe 610, and the foam outlet pipe 610 is sequentially connected with a pneumatic valve head 620, a flow sensor 630 and a one-way valve 640 from the end close to the fire pump 600 to the end far from the fire pump 600, wherein the measurement data of the flow sensor 630 can be transmitted to the control console. During teaching, it is possible to replace a pneumatic valve head 620 or cause the pneumatic valve head 620 components to malfunction, thereby creating a phenomenon of no air pressure or insufficient air pressure, and the firefighters can determine and troubleshoot the fault point based on the phenomenon, and then replace the pneumatic valve head 620 or swap the air inlet and outlet positions of the pneumatic valve head 620; further, during the teaching process, the quick-connect connector of the flow meter can be unplugged in advance or a faulty flow meter can be replaced to create a fault point in the console display interface where the flow is insufficient or a flow sensor 630 is prompted to fail, so that the firefighters can observe and determine the fault point, and then maintain the line or replace the flow sensor 630; further, during the teaching process, a blockage can be added to the one-way valve 640 in advance or a faulty one-way valve 640 can be replaced to create an abnormal flow in the foam outlet pipe 610, so that the firefighters can observe and determine the fault point, and then remove the blockage or replace the one-way valve 640.

[0058] In some embodiments, the fire monitor 700 is provided with a rotating motor 710 and a pitch motor 720 that can provide power for the liquid column circulating in the fire monitor 700. Therefore, during the teaching process, the circuit of the rotating motor 710 and / or the pitch motor 720 can be cut off or the faulty rotating motor 710 and / or the pitch motor 720 can be replaced in advance to create a phenomenon in which the liquid column cannot be ejected or the ejection is weak and unsustainable, so that the firefighters can observe and determine the fault point, and then maintain the circuit or replace the rotating motor 710 and / or the pitch motor 720.

[0059] In some embodiments, the foam pump 500 is provided with a foam external suction outlet. Therefore, during the teaching process, a blockage can be added to the filter screen of the foam external suction outlet 510 in advance to create a phenomenon in which the foam cannot be sucked in or the foam suction speed is too slow, and the firefighters can eliminate and determine the fault point.

[0060] In some embodiments, a cooling water pipeline 810 is provided between the air compressor 300 and the chiller 800. Therefore, during the teaching process, a blockage may be added to the cooling water pipeline 810 in advance to cause insufficient cooling water supply in the air compressor 300, thereby causing the console display interface to display an oil temperature alarm for the air compressor 300, so that firefighters can eliminate and determine the fault point and clear the blockage.

[0061] In some embodiments, the mechanical pneumatic system also includes an air filter end, which is connected to the air compressor 300. Therefore, during the teaching process, a fault point can be set in advance on the connecting pipeline between the air filter end and the air compressor 300, such as setting a pressure regulating valve on the connecting pipeline, and opening the pressure regulating valve in advance to reduce the air pressure in the connecting pipeline, that is, the air pressure value on the controller display interface changes, and the firefighters judge the fault point according to the change in the air pressure value, check the airtightness of the air circuit, seal the leaking point or adjust the pressure of the pressure regulating valve.

[0062] During the teaching process, multiple fault points can be set up at the same time, and the firefighters will check each fault point one by one according to the phenomenon and repair the fault point. At the same time, in order to achieve better teaching effects, the gaps between the components of the Class A foam fire extinguishing teaching platform disclosed in the present invention are much larger than the Class A foam fire extinguishing system used for fire extinguishing. In order to facilitate the observation of firefighters, the automatic foam control system composed of the fire cannon 700, fire pump 600, foam pump 500, air compressor 300, oil storage tank 400 and control system are all arranged vertically to allow firefighters to observe the direction of each component and pipeline.

[0063] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0064] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. Class A foam fire extinguishing teaching platform, characterized by: include: A mechanical pneumatic system, the mechanical pneumatic system comprising a fire monitor (700), a fire pump (600), a foam pump (500), an air compressor (300), an oil storage tank (400) that can be connected to the air compressor (300), a liquid storage tank (200) for storing water and / or foam, and a transmission system (100), wherein the fire monitor (700), the fire pump (600), the foam pump (500), the air compressor (300), the oil storage tank (400), the liquid storage tank (200), and the transmission system (100) are connected via a pipeline, and the pipeline is provided with a plurality of interfaces, a pump body, and a control valve; and A control system includes a console and a plurality of sensors and meters arranged on the mechanical pneumatic system and connected to the console, wherein the console can sense and display the working conditions and measurement data of the sensors and meters.

2. The Class A foam fire extinguishing teaching platform according to claim 1, characterized in that: The control system further comprises a plurality of operating switches for each component, and the plurality of operating switches and control valves are all electrically connected to the control console.

3. The Class A foam fire extinguishing teaching platform according to claim 1, characterized in that: The transmission system (100) comprises a motor (110), the motor (110) being coaxially connected to an intermediate support assembly (120), and the intermediate support assembly (120) being sequentially connected to the shafts of the air compressor (300) and the fire pump (600); The output shaft of the motor (110) is sequentially connected to a universal joint (130) and a telescopic joint oil seal (140); the two sides of the intermediate support assembly (120) are respectively connected to universal joints (130); the intermediate support assembly (120) is provided with a grease filling hole; the other side of the universal joint (130) located on the side of the intermediate support assembly (120) close to the air compressor (300) is provided with a telescopic joint oil seal (140); the two sides of the air compressor (300) are respectively connected to universal joints (130); the other side of the universal joint (130) located on the side of the air compressor (300) close to the fire pump (600) is provided with a telescopic joint oil seal (140); the side of the fire pump (600) close to the air compressor (300) is also provided with a universal joint (130).

4. The Class A foam fire extinguishing teaching platform according to claim 1, characterized in that: The liquid storage tank (200) is provided with a liquid level sensor (210) / liquid level meter (220) for measuring the liquid level in the liquid storage tank (200).

5. The Class A foam fire extinguishing teaching platform according to claim 1, characterized in that: The liquid storage tank (200) is connected to a water injection pipeline (230), and the input and output of the water injection pipeline (230) are connected to an external water injection ball valve (240); An overflow pipe (250) is arranged in the liquid storage tank (200) and has a bottom close to the bottom of the liquid storage tank (200); the top end of the overflow pipe (250) extends out of the liquid storage tank (200); and the top end of the overflow pipe (250) is connected to an overflow cap (260) for closing the overflow pipe (250); A sewage outlet is provided at the bottom of the liquid storage tank (200), and the sewage outlet is connected to a sewage outlet solenoid valve (270) for controlling the opening and closing of the sewage outlet.

6. The Class A foam fire extinguishing teaching platform according to claim 1, characterized in that: The liquid storage tank (200) is provided with a water outlet pipe (280) for supplying water to the fire pump (600); The fire pump (600) is connected to a foam liquid outlet pipe (610), and the foam liquid outlet pipe (610) is connected to a pneumatic valve head (620), a flow sensor (630) and a one-way valve (640) in sequence from an end close to the fire pump (600) to an end far from the fire pump (600), wherein the measurement data of the flow sensor (630) can be transmitted to a control console.

7. The Class A foam fire extinguishing teaching platform according to claim 1, characterized in that: The fire monitor (700) is provided with a rotating motor (710) and a pitching motor (720) capable of providing power to a liquid column circulating in the fire monitor (700).

8. The Class A foam fire extinguishing teaching platform according to claim 1, characterized in that: The foam pump (500) is provided with a foam suction outlet.

9. The Class A foam fire extinguishing teaching platform according to claim 1, characterized in that: The Class A foam fire extinguishing teaching platform further comprises a cooler (800), and a cooling water pipeline (810) is provided between the air compressor (300) and the cooler (800).

10. The Class A foam fire extinguishing teaching platform according to claim 1, characterized in that: The mechanical pneumatic system further comprises an air filter end, and the air filter end is connected to the air compressor (300).

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