A mobile precision fire extinguishing device and method for new energy vehicle battery pack fires

Abstract

The present invention belongs to the technical field of fire extinguishing equipment, specifically a mobile precise fire extinguishing device and method for new energy vehicle battery pack fires, including a fire extinguishing robot body; the fire extinguishing robot body is provided with a fire extinguishing mechanism for precisely extinguishing the new energy vehicle battery, the fire extinguishing mechanism includes a liquid nitrogen tank installed in the fire extinguishing robot body, and the fire extinguishing robot body is fixedly installed with a first liquid nitrogen pipeline connected to the liquid nitrogen tank; the present invention starts the fire extinguishing robot body and moves it to the side of the new energy vehicle that has caught fire, and positions it through the visual sensor on the fire extinguishing robot body, so that the liquid nitrogen nozzle can be accurately close to the fire point. At this time, the liquid nitrogen in the liquid nitrogen tank is started, so that the liquid nitrogen passes through the first liquid nitrogen pipeline, the telescopic pipeline and the second liquid nitrogen pipeline, and enters the potassium-breaking blade and is sprayed toward the fire point of the battery through the liquid nitrogen nozzle. Thereby, precise fire extinguishing of the new energy vehicle battery is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fire-fighting robots, and specifically provides a mobile precise fire-fighting device and method for new energy vehicle battery pack fires. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional automotive fuels as their power source and integrate advanced technologies in vehicle power control and driving. Existing new energy vehicles are mostly powered by electricity, and the purpose of driving is achieved by installing batteries in the vehicle.

[0003] The batteries of new energy vehicles are very prone to fire when hit. Currently, when an electric vehicle catches fire, it is difficult for the fire extinguishing agent to reach the battery area, making it difficult to effectively control the fire. This situation not only threatens the safety of the vehicle and personnel, but may also cause serious damage to the surrounding environment. Existing technologies mainly focus on the structural safety and fault prevention of electric vehicle batteries. However, for vehicles that have already caught fire, there is still a lack of effective solutions, especially how to quickly and safely deliver the fire extinguishing agent to the battery location. In addition, current fire extinguishing technology is often unable to accurately locate the source of the fire, resulting in low fire extinguishing efficiency and greater safety risks during operation. Therefore, when dealing with electric vehicle fires, the existing technology cannot effectively solve the problem of the fire extinguishing agent having difficulty reaching the battery area, and has the defects of low fire extinguishing efficiency, insufficient safety and insufficient environmental protection.

[0004] To this end, the present invention provides a mobile precision fire extinguishing device and method for new energy vehicle battery pack fires. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the mobile precise fire extinguishing device for new energy vehicle battery pack fire described in the present invention includes a fire extinguishing robot body; the fire extinguishing robot body is provided with a fire extinguishing mechanism for precisely extinguishing the new energy vehicle battery, the fire extinguishing mechanism includes a liquid nitrogen tank installed in the fire extinguishing robot body, a first liquid nitrogen pipeline connected to the liquid nitrogen tank is fixedly installed in the fire extinguishing robot body, a one-way valve is installed in the first liquid nitrogen pipeline, a telescopic pipeline and a second liquid nitrogen pipeline are provided in the fire extinguishing robot body, one end of the telescopic pipeline and The first and second liquid nitrogen pipelines are connected, the other end of the telescopic pipeline is connected to the second liquid nitrogen pipeline, a potassium-piercing nozzle is fixedly installed on the top of the fire-fighting robot body, and the end of the second liquid nitrogen pipeline away from the telescopic pipeline is in the potassium-piercing nozzle. A connecting pipe is sleeved on the top of the potassium-piercing nozzle, and a hollow potassium-breaking cutting edge is fixedly installed on the top of the connecting pipe. A liquid nitrogen nozzle connected to the interior is provided on the surface of the potassium-breaking cutting edge, and a visual window is provided on one side of the fire-fighting robot body; a ventilation mechanism for accelerating air flow and a protective mechanism for protecting the liquid nitrogen nozzle are provided in the potassium-piercing nozzle.

[0007] Furthermore, the ventilation mechanism includes an arc-shaped fixed frame fixedly installed on the inner wall of the potassium-piercing nozzle, the internal sealing sliding connection of the fixed frame is connected to a sliding rod, a spring is fixedly installed between the sliding rod and the fixed frame, one end of the fixed frame is fixedly installed with an air inlet pipe and an air outlet pipe connected to the interior, and a one-way valve is installed inside the air inlet pipe and the air outlet pipe. The surface of the potassium-breaking cutting edge is rotatably connected to a connecting plate through a torsion spring, a first magnetic block is fixedly installed on one side of the connecting plate, and a second magnetic block adsorbed by the first magnetic block is fixedly installed on one side of the sliding rod.

[0008] Furthermore, a flow guiding mechanism is provided in the second liquid nitrogen pipeline, and the flow guiding mechanism includes a protective cover fixedly installed in the second liquid nitrogen pipeline, a servo motor is fixedly installed inside the protective cover, and a connecting rod is fixedly installed inside the connecting pipe, and the bottom of the connecting rod is fixedly connected to the output end of the servo motor.

[0009] Furthermore, the protective mechanism includes a rectangular block fixedly mounted on the top of the sliding rod, an electromagnet fixedly mounted on one side of the rectangular block, a rotating plate rotatably connected to the top of the sliding rod, a cover plate fitted with the liquid nitrogen nozzle fixedly mounted on one end of the rotating plate, and an arc-shaped magnetic rod fixedly mounted on the top of the rotating plate.

[0010] Furthermore, breathable cloth is fixedly installed in the air inlet pipe and the air outlet pipe, a first guard plate is rotatably connected to the air inlet pipe via a torsion spring, and a second guard plate is rotatably connected to the air outlet pipe via a torsion spring.

[0011] Furthermore, a blowing mechanism is provided in the fixed frame, and the blowing mechanism includes two first elastic blocks symmetrically fixedly installed in the fixed frame, and the surfaces of the two first elastic blocks are provided with shrinkage holes, and the surfaces of the first elastic blocks are fixedly installed with a feed pipe and a discharge pipe with a one-way valve, and two symmetrically arranged bosses are fixedly installed in the fixed frame, and a rubber sealing strip is fixedly installed on the surface of the sliding rod.

[0012] Furthermore, the boss is made of hollow rubber material, and a maintenance component is provided in the fixed frame. The maintenance component includes a rubber box fixedly installed in the fixed frame and filled with maintenance liquid. A liquid inlet pipe connected to the rubber box is fixedly installed on the top of the fixed frame, and a coiled pipe is fixedly installed on one side of the fixed frame. The boss and the coiled pipe are connected by a pipe with a one-way valve, and the rubber box and the coiled pipe are connected by a hose with a one-way valve. A shrinkage hole is opened at the end of the coiled pipe, and a baffle in contact with the connecting plate is fixedly installed on the surface of the potassium-breaking cutting edge.

[0013] Furthermore, a hollow second elastic block is fixedly installed on the top of the sliding rod, and an air duct connected to the interior is fixedly installed on the top of the second elastic block. The end of the air duct away from the second elastic block passes through the rotating plate and the cover plate and is close to the liquid nitrogen nozzle.

[0014] A precise fire extinguishing method using the above-mentioned new energy vehicle battery comprises the following steps:

[0015] S1: Start the fire-fighting robot and move it to the new energy vehicle where the fire is. The robot uses the visual sensor on the robot to locate the vehicle and activate the liquid nitrogen in the liquid nitrogen tank. The liquid nitrogen passes through the first liquid nitrogen pipe, the telescopic pipe, and the second liquid nitrogen pipe, and enters the potassium-breaking edge. After that, it is sprayed toward the fire site of the battery through the liquid nitrogen nozzle.

[0016] S2: Start the servo motor inside the protective cover. The servo motor rotates together with the connecting pipe, potassium-breaking blade and liquid nitrogen nozzle through the connecting rod. The rotating potassium-breaking blade will spread the sprayed liquid nitrogen to the surroundings.

[0017] S3: When the potassium-breaking blade rotates, it will rotate with the connecting plate and the slide rod. The slide rod draws the external gas into the fixed frame through the air inlet pipe and then ejects it through the air outlet pipe.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. A mobile precision fire extinguishing device for a new energy vehicle battery pack fire according to the present invention, by moving the fire extinguishing robot body to the side of the new energy vehicle that has caught fire, and positioning it through the visual sensor on the fire extinguishing robot body, so that the liquid nitrogen nozzle can be accurately close to the fire point. At this time, the liquid nitrogen in the liquid nitrogen tank is started, so that the liquid nitrogen passes through the first liquid nitrogen pipeline, the telescopic pipeline and the second liquid nitrogen pipeline, and enters the potassium-breaking blade and is sprayed toward the fire place of the battery through the liquid nitrogen nozzle. Thereby achieving precise fire extinguishing of the new energy vehicle battery. The designed mechanism can quickly extinguish the car battery that has caught fire, and at the same time, there is no need for the staff to get too close to the car battery after the fire, to prevent the car battery explosion from causing harm to the staff, greatly reducing the risk during fire extinguishing.

[0020] 2. a kind of mobile accurate fire extinguishing device of new energy vehicle battery pack fire of the present invention, by when liquid nitrogen tank starts, start the servo motor in protective cover at the same time, servo motor rotates together with connecting pipe, broken potassium cutting edge and liquid nitrogen spout by connecting rod, the broken potassium cutting edge of rotation can spread the liquid nitrogen ejected to all around, thus greatly improving the area of ​​spray fire extinguishing.Along with the rotation of broken potassium cutting edge, broken potassium cutting edge can rotate together with connecting plate and sliding bar, and then by air inlet pipe, external gas is sucked into fixed frame, sliding bar squeezes the gas in fixed frame and communicates outlet pipe to eject, so that there is air flow at liquid nitrogen spout.Hot gas and steam can be taken away rapidly, liquid nitrogen can be cooled faster, while preventing liquid nitrogen from weakening because of the effect caused by gas accumulation in fire extinguishing process.Simultaneously, liquid nitrogen fire extinguishing can cause surrounding oxygen to reduce, ensures that there is enough oxygen around.

[0021] 3. The mobile precision fire extinguishing device for new energy vehicle battery pack fires disclosed herein utilizes a potassium-breaking cutting edge in its initial state, with the cover plate positioned on the surface of the liquid nitrogen nozzle to cover it, thereby reducing the risk of impurities entering the nozzle and causing blockage. The designed cover plate, electromagnet, and magnetic rod protect the liquid nitrogen nozzle without affecting its normal discharge.

[0022] 4. The mobile precision fire extinguishing device for new energy vehicle battery pack fires described in the present invention continuously squeezes the first elastic block as the slide moves within the fixed frame, causing the gas within the first elastic block to be squeezed and blown out through the discharge pipe. The blown gas then blows the ejected liquid nitrogen in all directions, further expanding the fire extinguishing range and preventing the battery area from being ignited by the flames. The side of the connecting plate without the first magnetic block contacts the side of the slide without the second magnetic block. The connecting plate and the slide squeeze the boss, allowing the gas within the boss to enter the coiled tube through a pipe with a one-way valve, thereby expanding the coiled tube. As the slide continues to move, it squeezes the rubber box, and the maintenance liquid within the rubber box enters the coiled tube through a hose with a one-way valve and is sprayed into the liquid nitrogen nozzle through the shrinkage hole at the end, thereby maintaining the pipeline. At the same time, the gas within the second elastic block is blown toward the liquid nitrogen nozzle through the air guide pipe, blowing the maintenance liquid within the liquid nitrogen nozzle toward the second liquid nitrogen pipeline and the telescopic pipe, thereby achieving a better maintenance effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the fire-fighting robot body of the present invention;

[0025] Figure 2 This is a schematic cross-sectional view of the fire-fighting robot body of the present invention;

[0026] Figure 3 This is a schematic structural diagram of the potassium-penetrating nozzle in the present invention;

[0027] Figure 4 It is a structural diagram of the fixing frame in the present invention;

[0028] Figure 5 It is a schematic cross-sectional structural diagram of the fixing frame in the present invention;

[0029] Figure 6 It is a partial cross-sectional structural diagram of the air inlet pipe and the air outlet pipe in the present invention;

[0030] Figure 7 In the present invention Figure 2 Schematic diagram of the structure at A;

[0031] Figure 8 In the present invention Figure 4 Schematic diagram of the structure at B;

[0032] Figure 9 In the present invention Figure 4 Schematic diagram of the structure at C;

[0033] Figure 10 It is a flow chart of the method of the present invention.

[0034] In the picture: 1. Fire-fighting robot body;

[0035] 10. Fire extinguishing mechanism; 11. Liquid nitrogen tank; 12. First liquid nitrogen pipeline; 13. Telescopic pipe; 14. Second liquid nitrogen pipeline; 15. Potassium-piercing nozzle; 16. Connecting pipe; 17. Potassium-piercing cutting edge; 18. Liquid nitrogen nozzle; 19. Vision window;

[0036] 20. Ventilation mechanism; 21. Fixed frame; 22. Sliding rod; 23. Air inlet pipe; 24. Air outlet pipe; 25. Connecting plate; 26. First magnetic block; 27. Second magnetic block;

[0037] 30. Flow guide mechanism; 31. Connecting rod; 32. Protective cover; 33. Servo motor;

[0038] 40. Protective mechanism; 41. Rectangular block; 42. Electromagnet; 43. Rotating plate; 44. Cover plate; 45. Magnetic rod; 46. Breathable fabric; 47. First protective plate; 48. Second protective plate;

[0039] 50. Blowing mechanism; 51. First elastic block; 52. Feed pipe; 53. Discharge pipe; 54. Boss; 55. Sealing strip; 56. Maintenance assembly; 57. Baffle; 58. Liquid inlet pipe;

[0040] 561. Rubber box; 562. Roll tube; 563. Second elastic block; 564. Air guide tube. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0042] like Figures 1 to 9As shown, a mobile precise fire extinguishing device for a new energy vehicle battery pack fire according to an embodiment of the present invention includes a fire extinguishing robot body 1; a fire extinguishing mechanism 10 for precisely extinguishing a new energy vehicle battery fire is provided in the fire extinguishing robot body 1, the fire extinguishing mechanism 10 includes a liquid nitrogen tank 11 installed in the fire extinguishing robot body 1, a first liquid nitrogen pipeline 12 connected to the liquid nitrogen tank 11 is fixedly installed in the fire extinguishing robot body 1, a one-way valve is installed in the first liquid nitrogen pipeline 12, a telescopic pipeline 13 and a second liquid nitrogen pipeline 14 are provided in the fire extinguishing robot body 1, One end of the telescopic pipe 13 is connected to the first liquid nitrogen pipe 12, and the other end of the telescopic pipe 13 is connected to the second liquid nitrogen pipe 14. A potassium-piercing nozzle 15 is fixedly installed on the top of the fire-fighting robot body 1. The end of the second liquid nitrogen pipe 14 away from the telescopic pipe 13 is in the potassium-piercing nozzle 15. A connecting pipe 16 is sleeved on the top of the potassium-piercing nozzle 15. A hollow potassium-breaking cutting edge 17 is fixedly installed on the top of the connecting pipe 16. A liquid nitrogen nozzle 18 connected to the interior is provided on the surface of the potassium-breaking cutting edge 17. A visual window 19 is provided on one side of the fire-fighting robot body 1.

[0043] During operation, by loading the liquid nitrogen tank 11 into the fire-fighting robot body 1, and connecting the liquid nitrogen tank 11, the first liquid nitrogen pipeline 12, the telescopic pipe 13 and the second liquid nitrogen pipeline 14, the telescopic pipe 13 is designed to be retractable in order to adapt to the different first liquid nitrogen pipelines 12 and the second liquid nitrogen pipelines 14. When the battery of the new energy vehicle catches fire, the fire-fighting robot body 1 is started and moved to the side of the new energy vehicle that has caught fire, and is positioned by the visual sensor on the fire-fighting robot body 1 so that the liquid nitrogen nozzle 18 can be accurately close to the fire point. At this time, the liquid nitrogen in the liquid nitrogen tank 11 is started, so that the liquid nitrogen passes through the first liquid nitrogen pipeline 12, the telescopic pipe 13 and the second liquid nitrogen pipeline 14, and enters the potassium-breaking cutting edge 17 and is sprayed toward the fire place of the battery through the liquid nitrogen nozzle 18. Thereby achieving accurate fire extinguishing of the battery of the new energy vehicle.

[0044] The above-designed mechanism can quickly extinguish a burning car battery without requiring workers to get too close to the burning car battery, preventing the car battery from exploding and causing harm to workers, thereby greatly reducing the risk of fire extinguishing.

[0045] The ventilation mechanism 20 includes an arc-shaped fixed frame 21 fixedly mounted on the inner wall of the potassium-piercing nozzle 15. The interior of the fixed frame 21 is sealed and slidably connected to a slide rod 22. One end of the fixed frame 21 is fixedly mounted with an air inlet pipe 23 and an air outlet pipe 24 connected to the interior. A one-way valve is installed inside the air inlet pipe 23 and the air outlet pipe 24. The surface of the potassium-breaking cutting edge 17 is rotatably connected to a connecting plate 25 through a torsion spring. A first magnetic block 26 is fixedly mounted on one side of the connecting plate 25, and a second magnetic block 27 that is attracted to the first magnetic block 26 is fixedly mounted on one side of the slide rod 22.

[0046] Specifically, a flow guiding mechanism 30 is provided in the second liquid nitrogen pipeline 14. The flow guiding mechanism 30 includes a protective cover 32 fixedly installed in the second liquid nitrogen pipeline 14. A servo motor 33 is fixedly installed inside the protective cover 32. A connecting rod 31 is fixedly installed inside the connecting pipe 16. The bottom of the connecting rod 31 is fixedly connected to the output end of the servo motor 33.

[0047] During operation, when the liquid nitrogen tank 11 is started, the servo motor 33 in the protective cover 32 is started at the same time. The servo motor 33 rotates together with the connecting pipe 16, the potassium-breaking blade 17 and the liquid nitrogen nozzle 18 through the connecting rod 31 (it should be noted that they rotate at a uniform speed at this time, not at a high speed). The rotating potassium-breaking blade 17 will diffuse the sprayed liquid nitrogen to the surroundings instead of spraying it in one direction, thereby greatly increasing the area of ​​spray fire extinguishing. As the potassium-breaking blade 17 rotates, the potassium-breaking blade 17 will rotate with the connecting plate 25 and the slide bar 22. The slide bar 22 slides in the fixed frame 21, and then the external gas is sucked into the fixed frame 21 through the air inlet pipe 23. When the slide bar 22 moves to its maximum limit and cannot move further, the slide bar 22 will press the connecting plate 25 and force it to rotate counterclockwise, causing the connecting plate 25 and the slide bar 22 to separate. At this time, the slide bar 22 is no longer constrained and begins to reset under the action of the spring. The slide bar 22 squeezes the gas in the fixed frame 21 and communicates with the air outlet pipe 24 to spray out, thereby allowing air to flow at the liquid nitrogen nozzle 18. As the potassium-breaking blade 17 continues to rotate, the connecting plate 25 will be attracted and fixed again by the first magnetic block 26 and the second magnetic block 27 on the slide bar 22. The connecting plate 25 continues to drive the slide bar 22 to move and suck the gas into the fixed frame 21, thereby reciprocating the above operation, accelerating the circulation of air around the potassium-breaking blade 17.

[0048] The air circulation mechanism designed above can quickly remove hot gases and steam, allowing the liquid nitrogen to cool down faster and preventing the liquid nitrogen from losing its effectiveness due to gas accumulation during the fire extinguishing process. At the same time, liquid nitrogen fire extinguishing will cause a decrease in the surrounding oxygen, and by accelerating air circulation, sufficient oxygen is ensured in the surrounding area.

[0049] The protective mechanism 40 includes a rectangular block 41 fixedly mounted on the top of the slide bar 22, an electromagnet 42 fixedly mounted on one side of the rectangular block 41, a rotating plate 43 rotatably connected to the top of the slide bar 22, a cover plate 44 fitted with the liquid nitrogen nozzle 18 fixedly mounted on one end of the rotating plate 43, and an arc-shaped magnetic rod 45 fixedly mounted on the top of the rotating plate 43.

[0050] Specifically, breathable cloth 46 is fixedly installed in the air inlet pipe 23 and the air outlet pipe 24. A first guard plate 47 is rotatably connected to the air inlet pipe 23 via a torsion spring, and a second guard plate 48 is rotatably connected to the air outlet pipe 24 via a torsion spring.

[0051] During operation, when the potassium-breaking cutting edge 17 is in the initial state, the cover plate 44 is on the surface of the liquid nitrogen spout 18 to cover it, thereby reducing the situation that impurities enter the liquid nitrogen spout 18 and cause it to be blocked. When the potassium-breaking cutting edge 17 starts to rotate, the electromagnet 42 on the rectangular block 41 is energized in advance, and then the magnetic rod 45 on the rotating plate 43 is adsorbed, so that the magnetic rod 45 rotates with the rotating plate 43 and the cover plate 44 in the direction of the slide bar 22, thereby opening the liquid nitrogen spout 18 and facilitating the liquid nitrogen ejection work. The designed cover plate 44, electromagnet 42 and magnetic rod 45 will not affect the normal ejection of liquid nitrogen while protecting the liquid nitrogen spout 18.

[0052] When the air inlet pipe 23 inhales gas, the inhalation will rotate the first guard plate 47 open, thereby facilitating the entry of gas; when the gas is ejected through the air outlet pipe 24, the gas will rotate and push the second guard plate 48 open, thereby facilitating the ejection of gas; and the breathable cloth 46 is installed in the air inlet pipe 23 and the air outlet pipe 24 to prevent impurities from entering. At the same time, when the air inlet pipe 23 and the air outlet pipe 24 are not working, the first guard plate 47 and the second guard plate 48 will rotate and reset, and then slap the breathable cloth 46 to knock off the impurities on the breathable cloth 46, thereby preventing impurities from affecting the air intake efficiency of the breathable cloth 46.

[0053] A blowing mechanism 50 is provided in the fixed frame 21, and the blowing mechanism 50 includes two first elastic blocks 51 symmetrically fixedly installed in the fixed frame 21. Shrinkage holes are provided on the surfaces of the two first elastic blocks 51. A feed pipe 52 and a discharge pipe 53 with a one-way valve are fixedly installed on the surface of the first elastic block 51. Two symmetrically arranged bosses 54 are fixedly installed in the fixed frame 21, and a rubber sealing strip 55 is fixedly installed on the surface of the sliding rod 22. The boss 54 is made of hollow rubber. A maintenance component 56 is provided in the fixed frame 21. The maintenance component 56 includes a rubber box 561 fixedly installed in the fixed frame 21 and filled with maintenance liquid. A liquid inlet pipe 58 connected to the rubber box 561 is fixedly installed on the top of the fixed frame 21. A coiled tube 562 is fixedly installed on one side of the fixed frame 21. The boss 54 and the coiled tube 562 are connected by a pipe with a one-way valve. The rubber box 561 and the coiled tube 562 are connected by a hose with a one-way valve. A shrinkage hole is opened at the end of the coiled tube 562. The surface of the potassium-breaking cutting edge 17 is fixedly mounted with a baffle 57 that fits with the connecting plate 25.

[0054] Specifically, a hollow second elastic block 563 is fixedly installed on the top of the sliding rod 22, and an air guide tube 564 connected to the interior is fixedly installed on the top of the second elastic block 563. The end of the air guide tube 564 away from the second elastic block 563 passes through the rotating plate 43 and the cover plate 44 and is close to the liquid nitrogen nozzle 18.

[0055] During operation, when the slide rod 22 moves in the fixed frame 21, it will continuously squeeze the first elastic block 51, so that the gas in the first elastic block 51 is squeezed and blown out through the discharge pipe 53. The blown gas blows the sprayed liquid nitrogen to the surroundings, thereby further expanding the fire extinguishing range and preventing the surrounding area of ​​the battery from being ignited by the flames.

[0056] When the fire is extinguished, the fire extinguishing robot body 1 will not leave the fire point immediately, and the fire will produce acidic gases (such as hydrogen chloride and hydrogen sulfide). These acidic gases will enter the fire extinguishing robot body 1 through the liquid nitrogen nozzle 18, and the acidic gases will corrode the pipelines. After repeated and long-term use, the pipelines will be damaged. The first liquid nitrogen pipeline 12, the telescopic pipeline 13 and the second liquid nitrogen pipeline 14 in the fire extinguishing robot body 1 are too cumbersome to disassemble, making it difficult to replace the pipelines after they are damaged.

[0057] When the slide bar 22 stops working and contacts the boss 54, the servo motor 33 is allowed to reverse with the potassium-breaking blade 17, so that the side of the connecting plate 25 without the first magnetic block 26 contacts the side of the slide bar 22 without the second magnetic block 27. As the potassium-breaking blade 17 continues to rotate, the baffle 57 now abuts the connecting plate 25, preventing it from rotating. The connecting plate 25 squeezes the boss 54 with the slide bar 22, so that the gas in the boss 54 enters the coiled tube 562 (the working principle of the coiled tube 562 is similar to that of a blower) through the pipeline with a one-way valve, and then stretches the coiled tube 562 (one end of the coiled tube 562 is close to the liquid nitrogen nozzle 18). As the slide bar 22 continues to move, it squeezes the rubber box 561, and the maintenance liquid in the rubber box 561 (depending on the actual situation, the maintenance liquid can be epoxy resin paint) enters the coiled tube 562 through the hose with a one-way valve and is sprayed into the liquid nitrogen nozzle 18 through the shrinkage hole at the end, thereby playing a maintenance role on the pipeline.

[0058] At this time, the electromagnet 42 is de-energized, causing the rotating plate 43 to rotate away from the rectangular block 41. The electromagnet 42 is then energized, causing the rotating plate 43 to rotate toward the rectangular block 41 again and squeeze the second elastic block 563. The gas in the second elastic block 563 is blown toward the liquid nitrogen nozzle 18 through the air guide tube 564, and the maintenance liquid in the liquid nitrogen nozzle 18 is blown toward the second liquid nitrogen pipe 14 and the telescopic pipe 13, thereby achieving a better maintenance effect.

[0059] like Figure 10 As shown, a precise fire extinguishing method using the above-mentioned new energy vehicle battery includes the following steps:

[0060] S1: Start the fire-fighting robot body 1 and move it to the new energy vehicle where the fire has occurred. The robot body 1 uses the visual sensor to locate the vehicle and activates the liquid nitrogen in the liquid nitrogen tank 11 so that the liquid nitrogen passes through the first liquid nitrogen pipe 12, the telescopic pipe 13, and the second liquid nitrogen pipe 14, and enters the potassium-breaking cutting edge 17. The liquid nitrogen is then sprayed toward the fire site of the battery through the liquid nitrogen nozzle 18.

[0061] S2: Start the servo motor 33 in the protective cover 32. The servo motor 33 rotates together with the connecting pipe 16, the potassium-breaking blade 17 and the liquid nitrogen nozzle 18 through the connecting rod 31. The rotating potassium-breaking blade 17 spreads the sprayed liquid nitrogen to the surroundings.

[0062] S3: When the potassium-breaking cutting edge 17 rotates, it will rotate with the connecting plate 25 and the sliding rod 22. The sliding rod 22 draws the external gas into the fixed frame 21 through the air inlet pipe 23 and then ejects it through the air outlet pipe 24.

[0063] Working Principle: In the initial state of the potassium-breaking blade 17, the cover plate 44 is located on the surface of the liquid nitrogen nozzle 18, covering it, thereby reducing the possibility of impurities entering the liquid nitrogen nozzle 18 and causing it to clog. When the potassium-breaking blade 17 begins to rotate, the electromagnet 42 on the rectangular block 41 is pre-energized, which in turn attracts the magnetic rod 45 on the rotating plate 43, causing the magnetic rod 45 to rotate with the rotating plate 43 and the cover plate 44 toward the slide bar 22, thereby opening the liquid nitrogen nozzle 18 and facilitating the liquid nitrogen spraying operation.

[0064] When a fire breaks out in a new energy vehicle battery, the fire-fighting robot 1 is activated and moved to the vicinity of the burning new energy vehicle. The robot's visual sensor is used to accurately position the liquid nitrogen nozzle 18 near the fire point. The liquid nitrogen in the liquid nitrogen tank 11 is then activated, allowing it to pass through the first liquid nitrogen pipe 12, the telescopic pipe 13, and the second liquid nitrogen pipe 14, and then enter the potassium-breaking cutting edge 17 before being sprayed through the liquid nitrogen nozzle 18 toward the burning area of ​​the battery. This allows for precise fire extinguishing of the new energy vehicle battery.

[0065] When the liquid nitrogen tank 11 is started, the servo motor 33 in the protective cover 32 is started at the same time. The servo motor 33 rotates together with the connecting pipe 16, the potassium-breaking cutting edge 17 and the liquid nitrogen nozzle 18 through the connecting rod 31. The rotating potassium-breaking cutting edge 17 will spread the ejected liquid nitrogen to the surroundings. As the potassium-breaking cutting edge 17 rotates, the potassium-breaking cutting edge 17 will rotate together with the connecting plate 25 and the sliding rod 22. The sliding rod 22 slides in the fixed frame 21, and then the external gas is sucked into the fixed frame 21 through the air inlet pipe 23. When the sliding rod 22 moves to the maximum limit and cannot move further, the sliding rod 22 will resist the connecting plate 25 and force it to rotate counterclockwise, thereby causing the connecting plate 25 and the sliding rod 22 to separate. At this time, the sliding rod 22 is no longer constrained and begins to reset under the action of the spring. The sliding rod 22 squeezes the gas in the fixed frame 21 and communicates with the air outlet pipe 24 to spray, thereby causing air to flow at the liquid nitrogen nozzle 18. As the potassium-breaking cutting edge 17 continues to rotate, the connecting plate 25 will be adsorbed and fixed again through the first magnetic block 26 and the second magnetic block 27 on the slide bar 22. The connecting plate 25 continues to drive the slide bar 22 to move and suck the gas into the fixed frame 21, thereby reciprocating the above operations to accelerate the circulation of air around the potassium-breaking cutting edge 17.

[0066] When the slide rod 22 moves in the fixed frame 21, it continuously squeezes the first elastic block 51, so that the gas in the first elastic block 51 is squeezed and blown out through the discharge pipe 53. The blown gas blows the sprayed liquid nitrogen to the surroundings, thereby further expanding the fire extinguishing range and preventing the surrounding area of ​​the battery from being ignited by the flames.

[0067] When the slide bar 22 stops working and contacts the boss 54, the servo motor 33 is driven to reverse the direction of the potassium-breaking blade 17, so that the side of the connecting plate 25 without the first magnetic block 26 contacts the side of the slide bar 22 without the second magnetic block 27. As the potassium-breaking blade 17 continues to rotate, the baffle 57 presses against the connecting plate 25, preventing it from rotating. The connecting plate 25 and the slide bar 22 squeeze the boss 54, so that the gas in the boss 54 enters the coil 562 through the pipe with a one-way valve, thereby stretching the coil 562. As the slide bar 22 continues to move, it squeezes the rubber box 561, and the maintenance liquid in the rubber box 561, which can be epoxy resin paint according to the actual situation, enters the coil 562 through the hose with a one-way valve and is sprayed into the liquid nitrogen nozzle 18 through the shrinkage hole at the end.

[0068] At this time, the electromagnet 42 is de-energized, causing the rotating plate 43 to rotate away from the rectangular block 41. The electromagnet 42 is then energized, causing the rotating plate 43 to rotate toward the rectangular block 41 again and squeeze the second elastic block 563. The gas in the second elastic block 563 is blown toward the liquid nitrogen nozzle 18 through the air guide tube 564, and the maintenance liquid in the liquid nitrogen nozzle 18 is blown toward the second liquid nitrogen pipe 14 and the telescopic pipe 13, thereby achieving a better maintenance effect.

[0069] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A mobile precision fire extinguishing device for new energy vehicle battery pack fires, comprising a fire extinguishing robot body (1); characterized in that: The fire extinguishing robot body (1) is provided with a fire extinguishing mechanism (10) for accurately extinguishing a fire of a new energy vehicle battery. The fire extinguishing mechanism (10) comprises a liquid nitrogen tank (11) installed in the fire extinguishing robot body (1). A first liquid nitrogen pipeline (12) connected to the liquid nitrogen tank (11) is fixedly installed in the fire extinguishing robot body (1). A one-way valve is installed in the first liquid nitrogen pipeline (12). A telescopic pipeline (13) and a second liquid nitrogen pipeline (14) are provided in the fire extinguishing robot body (1). One end of the telescopic pipeline (13) is connected to the first liquid nitrogen pipeline (12). The other end of the telescopic pipe (13) is connected to the second liquid nitrogen pipe (14), a potassium-penetrating nozzle (15) is fixedly installed on the top of the fire-fighting robot body (1), and one end of the second liquid nitrogen pipe (14) away from the telescopic pipe (13) is located in the potassium-penetrating nozzle (15), a connecting pipe (16) is sleeved on the top of the potassium-penetrating nozzle (15), a hollow potassium-breaking cutting edge (17) is fixedly installed on the top of the connecting pipe (16), a liquid nitrogen nozzle (18) connected to the interior is provided on the surface of the potassium-penetrating cutting edge (17), and a visual window (19) is provided on one side of the fire-fighting robot body (1); The potassium-penetrating nozzle (15) is provided with a ventilation mechanism (20) for accelerating air flow, and a protection mechanism (40) for protecting the liquid nitrogen nozzle (18); The ventilation mechanism (20) includes an arc-shaped fixed frame (21) fixedly mounted on the inner wall of the potassium-piercing nozzle (15), the interior of the fixed frame (21) is sealed and slidably connected to a slide rod (22), a spring is fixedly mounted between the slide rod (22) and the fixed frame (21), one end of the fixed frame (21) is fixedly mounted with an air inlet pipe (23) and an air outlet pipe (24) connected to the interior, a one-way valve is mounted inside the air inlet pipe (23) and the air outlet pipe (24), the surface of the potassium-breaking cutting edge (17) is rotatably connected to a connecting plate (25) via a torsion spring, a first magnetic block (26) is fixedly mounted on one side of the connecting plate (25), and a second magnetic block (27) adsorbed to the first magnetic block (26) is fixedly mounted on one side of the slide rod (22); A flow guiding mechanism (30) is provided in the second liquid nitrogen pipeline (14), the flow guiding mechanism (30) comprising a protective cover (32) fixedly mounted in the second liquid nitrogen pipeline (14), a servo motor (33) fixedly mounted inside the protective cover (32), a connecting rod (31) fixedly mounted inside the connecting pipe (16), and a bottom of the connecting rod (31) fixedly connected to an output end of the servo motor (33).

2. The mobile precision fire extinguishing device for new energy vehicle battery pack fire according to claim 1, characterized in that: The protection mechanism (40) comprises a rectangular block (41) fixedly mounted on the top of the slide bar (22), an electromagnet (42) fixedly mounted on one side of the rectangular block (41), a rotating plate (43) rotatably connected to the top of the slide bar (22), a cover plate (44) fitted with the liquid nitrogen nozzle (18) fixedly mounted on one end of the rotating plate (43), and an arc-shaped magnetic rod (45) fixedly mounted on the top of the rotating plate (43).

3. The mobile precision fire extinguishing device for new energy vehicle battery pack fire according to claim 1 is characterized by: A breathable cloth (46) is fixedly installed in both the air inlet pipe (23) and the air outlet pipe (24); a first guard plate (47) is rotatably connected to the air inlet pipe (23) via a torsion spring; and a second guard plate (48) is rotatably connected to the air outlet pipe (24) via a torsion spring.

4. The mobile precision fire extinguishing device for new energy vehicle battery pack fire according to claim 1, characterized in that: A blowing mechanism (50) is provided in the fixed frame (21), and the blowing mechanism (50) comprises two first elastic blocks (51) symmetrically fixedly installed in the fixed frame (21), the surfaces of the two first elastic blocks (51) are provided with shrinkage holes, and a feed pipe (52) and a discharge pipe (53) with a one-way valve are fixedly installed on the surface of the first elastic block (51), two symmetrically arranged bosses (54) are fixedly installed in the fixed frame (21), and a rubber sealing strip (55) is fixedly installed on the surface of the sliding rod (22).

5. The mobile precision fire extinguishing device for new energy vehicle battery pack fire according to claim 4 is characterized in that: The boss (54) is made of hollow rubber. A maintenance component (56) is provided in the fixed frame (21). The maintenance component (56) includes a rubber box (561) fixedly installed in the fixed frame (21) and filled with maintenance liquid. A liquid inlet pipe (58) connected to the rubber box (561) is fixedly installed on the top of the fixed frame (21). A coiled pipe (562) is fixedly installed on one side of the fixed frame (21). The boss (54) and the coiled pipe (562) are connected by a pipe with a one-way valve. The rubber box (561) and the coiled pipe (562) are connected by a hose with a one-way valve. A shrinkage hole is opened at the end of the coiled pipe (562). A baffle (57) that fits the connecting plate (25) is fixedly installed on the surface of the potassium-breaking cutting edge (17).

6. The mobile precision fire extinguishing device for new energy vehicle battery pack fire according to claim 5, characterized in that: A hollow second elastic block (563) is fixedly mounted on the top of the slide rod (22), and an air guide tube (564) communicating with the interior is fixedly mounted on the top of the second elastic block (563), and an end of the air guide tube (564) away from the second elastic block (563) passes through the rotating plate (43) and the cover plate (44) and is close to the liquid nitrogen nozzle (18).

7. A fire extinguishing method using the mobile precision fire extinguishing device for new energy vehicle battery pack fires according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Start the fire-fighting robot body (1) and move it to the side of the new energy vehicle on fire. Position it through the visual sensor on the fire-fighting robot body (1), start the liquid nitrogen in the liquid nitrogen tank (11), so that the liquid nitrogen passes through the first liquid nitrogen pipe (12), the telescopic pipe (13) and the second liquid nitrogen pipe (14), and enters the potassium-breaking edge (17) and then sprays toward the fire part of the battery through the liquid nitrogen nozzle (18); S2: Start the servo motor (33) in the protective cover (32). The servo motor (33) rotates together with the connecting pipe (16), the potassium-breaking blade (17) and the liquid nitrogen nozzle (18) through the connecting rod (31). The rotating potassium-breaking blade (17) spreads the sprayed liquid nitrogen to the surroundings. S3: When the potassium-breaking cutting edge (17) rotates, it rotates with the connecting plate (25) and the slide bar (22). The slide bar (22) draws the external gas into the fixed frame (21) through the air inlet pipe (23) and then ejects it through the air outlet pipe (24).

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