Mobile circulating water curtain fire extinguishing trolley for vehicle chassis fire

Abstract

The application provides a mobile circulating water curtain fire extinguishing trolley for vehicle chassis fire, comprising: a crawler trolley; a water storage tank; a water accumulation disc connected with the water storage tank or a water supply pipeline through a water return pipeline; a filtering assembly arranged above a water collection area of the water accumulation disc; an upward spraying unit with an inlet end communicated with the water storage tank or the water supply pipeline; a circulating water pump with an inlet end connected to the water collection area in the water accumulation disc and an outlet end connected to the water storage tank or the water supply pipeline; a sensor assembly for collecting the distance between the vehicle chassis and the water accumulation disc; and an execution module for receiving the distance between the current vehicle chassis and the water accumulation disc and sending corresponding spraying angle conversion instructions to the upward spraying unit; wherein the water storage tank, the upward spraying unit, the water accumulation disc, the filtering assembly and the circulating water pump jointly form a closed and insulated fire extinguishing agent circulating loop to improve the adaptability and efficiency of fire extinguishing, and the selection of the crawler trolley also increases the stability of the mobile fire extinguishing trolley.

Description

Mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires Technical Field

[0001] This invention relates to the field of vehicle fire extinguishing equipment technology, and more specifically, to a mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires. Background Technology

[0002] Vehicle chassis fires, especially those involving power battery packs which are becoming increasingly frequent with the widespread adoption of new energy vehicles, have become a new challenge in the field of fire rescue. These fires have significant unique characteristics and hazards: the fire source is located under the vehicle, in a concealed position with obstructed visibility; during the combustion process, high-temperature molten material or explosive fragments may drip or splash, posing a direct threat to firefighters and equipment.

[0003] Existing technologies have proposed several mobile fire extinguishing device solutions designed to deliver extinguishing agents directly to the underside of the chassis. For example, Chinese patent CN218501161U discloses a water spray rack that can be remotely moved to the underside of a vehicle, with an internal partition cavity to isolate the flames and protect the control mechanism below.

[0004] However, existing technical solutions still have shortcomings: First, they are unsustainable in remote or water-scarce environments, and the large amount of water leakage after spraying causes water waste and on-site water accumulation. Second, they lack the ability to cope with burning debris and complex environments. The water flowing back after spraying may carry burning residue, ground debris, etc., which will clog pipes and nozzles if directly recycled; existing devices do not consider effective filtration and collection of this. Third, they lack adaptability. The device's position and spray angle rely heavily on manual judgment or simple remote control, and cannot automatically adjust the spray pattern according to the vehicle's chassis height to form the optimal water curtain coverage, thus the fire extinguishing efficiency needs to be improved. Fourth, electrical safety protection is inadequate. In harsh environments such as high-voltage battery fires and water mist, if the device's electrical control components lack strict waterproofing, insulation, and isolation designs, there is a serious risk of leakage, short circuit, and even electric shock, threatening the safety of operators. Summary of the Invention

[0005] This invention provides a mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires, aiming to solve the problems of weak automatic adjustment capability, easy water dispersion and waste in existing fire extinguishing methods when dealing with vehicle chassis fires, thereby improving the adaptability and efficiency of fire extinguishing, while reducing water consumption and saving costs.

[0006] To achieve the above objectives, the present invention provides a mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires, comprising:

[0007] Water storage tanks are used to store water for firefighting.

[0008] An upward spraying unit, wherein the water inlet of the upward spraying unit is connected to the water storage tank through a water supply pipeline to spray fire extinguishing water upward;

[0009] A water collection tray to collect water that falls back after being sprayed.

[0010] The circulating filtration module includes a filter assembly, a circulating water pump, and a return water pipeline. The filter assembly is positioned above the water collection area of ​​the water collection pan. The inlet of the circulating water pump is connected to the water collection area in the water collection pan after filtration by the filter assembly through the return water pipeline, and its outlet is connected to the water storage tank or the water supply pipeline.

[0011] The adaptive adjustment module includes a sensor component and an execution module. The sensor component is disposed around the water collection pan and collects the distance between the vehicle chassis and the surface of the water collection pan. The execution module is configured with a distance-angle mapping relationship and sends a corresponding injection angle adjustment command to the upward injection unit based on the real-time distance transmitted by the sensor component and a discrete gear control algorithm.

[0012] The water storage tank, upward spraying unit, water collection pan, filter assembly, and circulating water pump together form a closed and insulated fire extinguishing agent circulation loop. The loop is electrically insulated as a whole to enable the circulation, filtration, and reuse of the fire extinguishing agent within the device.

[0013] In one embodiment, the upward injection unit includes:

[0014] A circumferential nozzle array, wherein the nozzles of the circumferential nozzle array are arranged along the periphery of the water collection tray and spray upward to form a closed water curtain surrounding the vehicle chassis;

[0015] A linear nozzle array, wherein the nozzles of the linear nozzle array are arranged in an area enclosed by the circumferential nozzle array, and spray at least one concentrated jet of water upward.

[0016] The spray angles of the circumferential nozzle array and the linear nozzle array are controlled by the execution module.

[0017] In one embodiment, the circumferential nozzle array employs fan-shaped atomizing nozzles to form a uniform and dense water curtain;

[0018] The linear nozzle array uses DC impact nozzles to form a high-impact water jet;

[0019] The water supply pipeline includes a first branch and a second branch that supply water to the circumferential nozzle array and the linear nozzle array, respectively, and the first branch and the second branch are equipped with independently controlled valves.

[0020] In one embodiment, the filter assembly includes a coarse filter and a fine filter arranged from top to bottom, wherein the mesh size of the fine filter is smaller than that of the coarse filter, and the coarse filter and the fine filter are removable mesh basket structures that can be pulled out or flipped up.

[0021] In one embodiment, the closed-loop insulation extinguishing agent circulation circuit specifically includes:

[0022] The bottom of the water collection pan is covered with a grounded metal wire mesh and connected to an external grounding body through a grounding component;

[0023] The circulating water pump is an all-plastic pump or a plastic-lined pump, and its metal casing and all exposed metal parts are reliably grounded.

[0024] The sensor assembly and electrical components near the wet area are all equipped with insulating protective covers;

[0025] The power supply for the execution module and the sensor assembly is a safety extra-low voltage isolated power supply.

[0026] In one embodiment, the execution module also acquires the induced current data in the grounding component in real time. When the induced current exceeds the preset safety threshold, it executes the forced correction logic through the discrete gear control algorithm to control the upward spray unit to switch from DC impact mode to fan-shaped atomization mode, and uses the discrete atomization medium to cut off the current return path.

[0027] In one embodiment, the angle between the spray direction of the circumferential nozzle array and the vertical direction is 0° to 30°, and the angle between the spray direction of the linear nozzle array and the vertical direction is 0° to 30°.

[0028] In one embodiment, the water storage tank, the circulating water pump, the execution module, and the power supply for the circulating water pump are all located outside the water collection pan and are connected to the water collection pan and the upward spraying unit through insulated pipes or isolated signal lines.

[0029] In one embodiment, the water storage tank is provided with a water supply interface for connecting to an external water source and a water level observer for observing the water level.

[0030] In one embodiment, the tracks of the tracked vehicle are made of flame-retardant, high-temperature resistant, and insulating rubber, and the tracks are embedded with a non-metallic fiber-reinforced skeleton.

[0031] In one embodiment, the sensor assembly is an ultrasonic sensor or an infrared sensor, and the detected distance range is divided into multiple discrete levels. The execution module controls the upward spray unit to switch to a preset fixed spray angle according to the current distance level.

[0032] The present invention has the following beneficial effects:

[0033] Water conservation: The device is equipped with an internal circulating water system that can collect, filter and reuse the water that falls back after spraying, reducing the continuous reliance on external water sources such as fire trucks or fire hydrants and avoiding large amounts of water spillage and waste.

[0034] High efficiency: The device automatically measures the vehicle chassis height through sensors and can adjust the spray angle of the water curtain so that the water curtain can better fit the chassis contour of different vehicle models, achieving more comprehensive coverage and improving the efficiency of fire extinguishing and cooling.

[0035] Strong adaptability: This application uses a tracked vehicle. After a fire, the vehicle may be parked in a garage, repair pit, off-road area, or uneven road surface after an accident. The off-road capability of the tracks allows the vehicle to easily overcome obstacles, wheel chocks in parking spaces, gravel, scattered parts, and objects falling after a vehicle fire, quickly approaching the fire source. Attached Figure Description

[0036] Figure 1 is a schematic diagram of the structure of a mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fire according to an embodiment of the present invention.

[0037] Figure 2 is a multi-angle structural schematic diagram of a mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fire according to an embodiment of the present invention.

[0038] Figure 3 is a side view of a mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fire according to an embodiment of the present invention.

[0039] Figure 4 is a front view schematic diagram of a mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fire according to an embodiment of the present invention.

[0040] Among them, 110 is a circumferential nozzle array; 120 is a linear nozzle array; 200 is a filter assembly; 300 is a track; 400 is a sensor assembly; 510 is a return water pipeline; 520 is a water supply pipeline; 530 is a pipeline interface; 600 is an execution module; 700 is a water storage tank; 810 is a circulating water pump; and 820 is a booster pump. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0042] Figures 1 to 4 are schematic diagrams of the structure of a mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires according to an embodiment of the present invention, including:

[0043] Tracked vehicle;

[0044] The water storage tank has a capacity of 700 cubic meters and is used to store water for firefighting.

[0045] An upward spraying unit, the water inlet of which is connected to the water storage tank 700 via a water supply pipe 520, for spraying fire extinguishing water upwards;

[0046] A water collection tray to collect water that falls back after being sprayed.

[0047] The circulating filtration module includes a filter assembly 200, a circulating water pump 810, and a return water pipe 510. The filter assembly 200 is disposed above the water collection area of ​​the water collection pan. The inlet of the circulating water pump 810 is connected to the water collection area in the water collection pan after being filtered by the filter assembly 200 through the return water pipe 510, and its outlet is connected to the water storage tank 700 or the water supply pipe 520.

[0048] The adaptive adjustment module includes a sensor assembly 400 and an execution module 600. The sensor assembly 400 is disposed around the water collection pan and collects the distance between the vehicle chassis and the surface of the water collection pan. The execution module 600 is configured with a distance-angle mapping relationship and sends a corresponding injection angle adjustment command to the upward injection unit based on the real-time distance transmitted by the sensor assembly 400 and a discrete gear control algorithm.

[0049] The upward spraying unit, water collection tray, and filter assembly 200 are located above the tracked vehicle. The water storage tank 700, upward spraying unit, water collection tray, filter assembly 200, and circulating water pump 810 together form a closed and insulated fire extinguishing agent circulation loop. The loop is electrically insulated as a whole to realize the circulation, filtration, and reuse of the fire extinguishing agent inside the device.

[0050] Specifically, the water storage tank 700 and the circulating water pump 810 are not located inside the water collection pan, and during fire extinguishing, the water storage tank 700 and the circulating water pump 810 are kept away from the fire area.

[0051] Specifically, the spray arm of the upward spraying unit is made of ordinary heat-resistant epoxy resin fiberglass. In order to protect the upward spraying unit, a detachable heat insulation sleeve made of ceramic fiber cloth or silicone fireproof cloth is installed at the front end of the spray arm for easy replacement.

[0052] Furthermore, for the water supply line 520 and the return line 510, lower-cost plastic pipes such as UPVC and HDPE are used in areas far from firefighting zones. In areas closer to firefighting zones, heat-resistant epoxy resin fiberglass is used, fitted with heat-insulating sleeves. Insulating flanges connect the plastic pipes and the heat-resistant epoxy resin fiberglass pipes.

[0053] In one embodiment, the upward injection unit includes:

[0054] A circumferential nozzle array 110, wherein the nozzles of the circumferential nozzle array 110 are arranged along the periphery of the water collection pan and spray upward to form a closed water curtain surrounding the vehicle chassis.

[0055] A linear nozzle array 120, wherein the nozzles of the linear nozzle array 120 are arranged in the area enclosed by the circumferential nozzle array 110, and spray at least one concentrated jet of water upward.

[0056] The spray angles of the circumferential nozzle array 110 and the linear nozzle array 120 are controlled by the execution module 600.

[0057] In one embodiment, the circumferential nozzle array 110 employs fan-shaped atomizing nozzles to form a uniform and dense water curtain;

[0058] The linear nozzle array 120 employs DC impact nozzles to form a high-impact water jet;

[0059] The water supply pipeline 520 includes a first branch and a second branch that supply water to the circumferential nozzle array 110 and the linear nozzle array 120 respectively, and the first branch and the second branch are equipped with independently controlled valves.

[0060] In one embodiment, the filter assembly 200 includes a coarse filter and a fine filter arranged from top to bottom. The mesh size of the fine filter is smaller than that of the coarse filter. The coarse filter and the fine filter are removable mesh basket structures that can be pulled out or flipped up.

[0061] In one embodiment, the closed-loop insulation extinguishing agent circulation circuit specifically includes:

[0062] The bottom of the water collection pan is covered with a grounded metal wire mesh and connected to an external grounding body through a grounding component;

[0063] The circulating water pump 810 is an all-plastic pump or a plastic-lined pump, and its metal casing and all exposed metal parts are reliably grounded.

[0064] The sensor assembly 400 and electrical components near the wet area are all equipped with insulating protective covers;

[0065] The power supply for the execution module 600 and the sensor assembly 400 is a safety extra-low voltage isolated power supply.

[0066] Furthermore, to prevent the water in the collection pan from becoming electrified, a stainless steel wire mesh is laid at the bottom of the pan. A wire connects the wire mesh to the externally grounded rescue vehicle body via a manually or automatically controlled grounding assembly, ensuring reliable grounding. Preferably, the grounding assembly can be a relay; before spraying, the operator presses a button or the system automatically closes the relay to ground the collection pan. If the collected return water is electrified, it will be released instantly.

[0067] In one embodiment, the execution module 600 also acquires the induced current data in the grounding component in real time. When the induced current exceeds the preset safety threshold, it executes the forced correction logic through the discrete gear control algorithm to control the upward spray unit to switch from DC impact mode to fan-shaped atomization mode, and uses the discrete atomization medium to cut off the current return path.

[0068] In one embodiment, the sensor assembly 400 is an ultrasonic sensor or an infrared sensor, and the detected distance range is divided into multiple discrete levels. The execution module 600 controls the upward spraying unit to switch to a preset fixed spraying angle according to the current distance level.

[0069] Furthermore, the sensor assembly 400 is provided with an insulating protective cover. The insulating protective cover is made of stainless steel as the outer shell, and the outer shell is reliably grounded. The interior is made of a thin-walled alumina ceramic sheet, which covers the ultrasonic sensor.

[0070] Furthermore, the sensor does not need a very precise detection distance, only a general range. In one embodiment, the detection distance is divided into near, medium, and far. The execution module 600 only needs to control the injection unit to switch to a few preset fixed angles, which reduces the accuracy requirements of the algorithm and the sensor.

[0071] In one embodiment, the water storage tank 700, the circulating water pump 810, the execution module 600, and the power supply provided to the circulating water pump 810 are all located outside the water collection pan and are connected to the water collection pan and the upward spraying unit through insulated pipes or isolated signal lines.

[0072] Specifically, the control cabinet of the execution module 600 is located in a dry area, and the signal transmission between it and the on-site fire extinguishing panel can be achieved by using an optocoupler or an isolation signal transmitter to completely cut off the electrical connection and prevent fault voltage from being conducted along the line.

[0073] Specifically, the circulating water pump 810 uses either an all-plastic pump or a plastic-lined pump. An all-plastic pump means that all parts in contact with water, such as the pump casing and impeller, are made of insulating and corrosion-resistant engineering plastics, such as PP (polypropylene), PVDF (polyvinylidene fluoride), and PPS (polyphenylene sulfide). A plastic-lined pump means that the outer casing is metal (for strength), while the inner lining and impeller are plastic. When using a plastic-lined pump, the pump casing must be reliably grounded: regardless of whether the pump body has a metal or plastic casing, any metal parts (such as the motor casing, mounting brackets, bolts) must be grounded with a dedicated yellow-green grounding wire.

[0074] The circulating water pump 810 uses an isolated power supply. The power source for the pump motor should come from a power supply unit with an isolation transformer, or use a frequency converter whose output voltage is isolated from the ground. This prevents fault voltages from the mains from entering the pump system.

[0075] Specifically, the power supply and circuitry, including those for sensors located under the vehicle or in environments prone to moisture, and circuits powering angle-adjusting motors, utilize extra-low voltage for safety. For example, isolated power supply modules using 24V or 12V DC are employed. Even in the event of leakage, the energy level is well below the danger threshold.

[0076] Furthermore, the motor controlling the spray angle is equipped with a protective housing that is dustproof, waterproof, and insulated. All electrical connections near wet areas must be placed in a waterproof junction box with a protection rating of at least IP65.

[0077] Furthermore, the cable laying path must be through waterproof metal flexible conduit or PVC cable protection pipe. All joints must be sealed with waterproof rubber rings and insulating silicone grease. Non-contact, passive sensors are preferred.

[0078] In one embodiment, the angle between the spray direction of the circumferential nozzle array 110 and the vertical direction is 0° to 30°, and the angle between the spray direction of the linear nozzle array 120 and the vertical direction is 0° to 30°.

[0079] In one embodiment, the water storage tank 700 is provided with a water supply interface for connecting to an external water source and a water level observer.

[0080] As shown in Figures 3 and 4, the track 300 of the tracked vehicle is made of flame-retardant, high-temperature resistant, and insulating rubber composite material. Specifically, preferably, the composite material can be based on ethylene propylene diene monomer (EPDM) rubber or chloroprene rubber (CR), with added flame retardants and oil-resistant modifiers, giving it thermal stability to withstand baking at temperatures above 150°C without softening, deformation, or sticking to the ground. The internal reinforcing skeleton of the track abandons the traditional steel wire cord and instead uses high-strength non-metallic fibers for weaving reinforcement.

[0081] In one embodiment, the water supply pipeline 520 is equipped with two booster pumps 820, which are respectively connected to the first water supply branch and the second water supply branch. The booster pumps 820 of the water supply pipeline 520 are connected to a high-pressure water pipe, which is connected to the upward spraying unit.

[0082] Furthermore, the booster pump 820 is equipped with an adjustment device to regulate the size of the water curtain and water column by controlling the pressure.

[0083] In one embodiment, as shown in Figure 4, two pipe interfaces 530 are provided on both sides of the water collection pan, which can be connected to the return water pipe 510. The return water pipe 510 is equipped with a filter device, and the filtered water enters the water supply pipe 520 or the water storage tank 700.

[0084] The present invention has the following beneficial effects:

[0085] Water conservation: The device is equipped with an internal circulating water system that can collect, filter and reuse the water that falls back after spraying, reducing the continuous reliance on external water sources such as fire trucks or fire hydrants and avoiding large amounts of water spillage and waste.

[0086] High efficiency: The device automatically measures the vehicle chassis height through sensors and can adjust the spray angle of the water curtain so that the water curtain can better fit the chassis contour of different vehicle models, achieving more comprehensive coverage and improving the efficiency of fire extinguishing and cooling.

[0087] Strong adaptability: This application uses a tracked vehicle. After a fire, the vehicle may be parked in a garage, repair pit, off-road area, or uneven road surface after an accident. The off-road capability of the tracks allows the vehicle to easily overcome obstacles, wheel chocks in parking spaces, gravel, scattered parts, and objects falling after a vehicle fire, quickly approaching the fire source.

[0088] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0089] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. It should also be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0090] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "driving" used in the description of this application should be interpreted broadly. They can refer to direct connections, connections through an intermediate medium, or relationships within two elements. Those skilled in the art can understand their specific meaning in this application based on the specific circumstances.

[0091] The embodiments described above are merely further illustrations of the present invention and are not intended to limit the present invention in any other way. The present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding modifications and changes based on the present invention, but all such modifications and changes should fall within the protection scope of the present invention.

Claims

1. A mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires, characterized in that, include: Water storage tanks are used to store water for firefighting. An upward spraying unit, the water inlet of which is connected to the water storage tank via a water supply pipe, sprays fire extinguishing water upwards. The upward spraying unit includes: a circumferential nozzle array, the nozzles of which are arranged along the periphery of the water collection tray, spraying upwards to form a closed water curtain surrounding the vehicle chassis; a linear nozzle array, the nozzles of which are arranged within the area enclosed by the circumferential nozzle array, spraying at least one concentrated jet of water upwards; a water collection tray, collecting the water that falls back after spraying; and a circulating filtration module, including a filter assembly, a circulating water pump, and a return water pipe. The filter assembly is located above the water collection area of ​​the water collection tray, and the water inlet of the circulating water pump is connected to the water storage tank via the return water pipe. The water collection area in the water collection pan after filtration by the filter assembly has its outlet connected to the water storage tank or the water supply pipeline; the adaptive adjustment module includes a sensor assembly and an execution module. The sensor assembly is set around the water collection pan to collect the distance between the vehicle chassis and the surface of the water collection pan. The execution module is set with a distance-angle mapping relationship and sends the corresponding spray angle adjustment command to the upward spraying unit based on the real-time distance transmitted by the sensor assembly and a discrete gear control algorithm; wherein, the water storage tank, the upward spraying unit, the water collection pan, the filter assembly and the circulating water pump together constitute a closed insulating fire extinguishing agent circulation loop. The loop is electrically insulated as a whole to realize the circulation, filtration and reuse of the fire extinguishing agent inside the device.

2. The mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires according to claim 1, characterized in that, The spray angles of the circumferential nozzle array and the linear nozzle array are controlled by the execution module.

3. The mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires according to claim 2, characterized in that, The circumferential nozzle array uses fan-shaped atomizing nozzles to form a uniform and dense water curtain; the linear nozzle array uses DC impact nozzles to form a high-impact water column; the water supply pipeline includes a first branch and a second branch that supply water to the circumferential nozzle array and the linear nozzle array respectively, and the first branch and the second branch are equipped with independently controlled valves.

4. The mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires according to claim 1, characterized in that, The filter assembly includes a coarse filter and a fine filter arranged from top to bottom. The mesh size of the fine filter is smaller than that of the coarse filter. The coarse filter and the fine filter are removable mesh basket structures that can be pulled out or flipped up.

5. The mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires according to claim 3, characterized in that, The closed insulating fire extinguishing agent circulation loop specifically includes: a grounded metal wire mesh laid at the bottom of the water collection pan and connected to an external grounding body through a grounding component; the circulating water pump is an all-plastic pump or a plastic-lined pump, and its metal shell and all exposed metal parts are reliably grounded; the sensor assembly and electrical components near the wet area are all equipped with insulating protective covers; the power supply for the execution module and the sensor assembly is a safety extra-low voltage isolated power supply.

6. The mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires according to claim 5, characterized in that, The execution module also acquires the induced current data in the grounding component in real time. When the induced current exceeds the preset safety threshold, it executes the forced correction logic through the discrete gear control algorithm to control the upward spray unit to switch from DC impact mode to fan-shaped atomization mode, and uses the discrete atomization medium to cut off the current return path.

7. The mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires according to claim 2, characterized in that, The angle between the spray direction of the circumferential nozzle array and the vertical direction is 0° to 30°, and the angle between the spray direction of the linear nozzle array and the vertical direction is 0° to 30°.

8. The mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires according to claim 5, characterized in that, The water storage tank, the circulating water pump, the execution module, and the power supply for the circulating water pump are all located outside the water collection pan and are connected to the water collection pan and the upward spraying unit through insulated pipes or isolated signal lines. The water storage tank is equipped with a water supply interface for connecting to an external water source and a water level observer for observing the water level.

9. The mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires according to claim 1, characterized in that, The mobile circulating water curtain fire extinguishing vehicle used for vehicle chassis fires is a tracked vehicle. The tracks of the tracked vehicle are made of flame-retardant, high-temperature resistant, and insulating rubber, and the tracks are embedded with a non-metallic fiber reinforced skeleton.

10. The mobile circulating water curtain fire extinguishing vehicle for vehicle chassis fires according to claim 1, characterized in that, The sensor assembly is an ultrasonic sensor or an infrared sensor, and the detection distance range is divided into multiple discrete levels. The execution module controls the upward spray unit to switch to a preset fixed spray angle according to the current distance level.

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