Liquid nitrogen injection type fire extinguishing robot

Abstract

The invention discloses a liquid nitrogen injection type fire extinguishing robot which comprises a cabinet body, trundles are installed at the bottom of the cabinet body, a liquid nitrogen heat insulation gas cylinder, a high-pressure driving gas cylinder and a refrigerating machine are installed in the cabinet body, the high-pressure driving gas cylinder communicates with the liquid nitrogen heat insulation gas cylinder through a gas supply pipeline, a fire extinguishing trolley is further arranged, and a frame plate on the fire extinguishing trolley can be remotely controlled to ascend and descend. A frame plate of the fire extinguishing trolley can support the cabinet body after rising, a liquid nitrogen injection pipeline is mounted in the fire extinguishing trolley, and a plurality of liquid injection pipes are arranged on the liquid nitrogen injection pipeline; and a liquid outlet of the liquid nitrogen heat insulation gas cylinder is communicated with the handheld spray gun and a liquid nitrogen injection pipeline on the fire extinguishing trolley through hoses respectively. A liquid nitrogen injection pipeline in the liquid nitrogen injection type fire extinguishing robot can be driven by a fire extinguishing trolley to drill into an ignition area which cannot be reached by a handheld spray gun; in addition, after the frame plate of the fire extinguishing trolley ascends, the cabinet body can be supported, so that the cabinet body can be quickly transferred through the fire extinguishing trolley.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing equipment, and more specifically to a liquid nitrogen jet fire extinguishing robot. Background Technology

[0002] Fires in lithium battery energy storage systems are characterized by thermal runaway, high risk of reignition, easy spread, and the potential generation of toxic gases (such as hydrogen, carbon monoxide, and hydrogen fluoride). In response to these characteristics, the fire extinguishing equipment used in these systems differs significantly from traditional fire suppression systems. It must detect anomalies in the early stages of thermal runaway, rapidly suppress open flames, continuously cool the battery pack, interrupt the thermal runaway chain reaction, prevent its spread to adjacent batteries, and provide long-term protection against reignition.

[0003] Currently, commonly used lithium battery fire extinguishing equipment mainly includes perfluorohexanone fire extinguishing systems, heptafluoropropane fire extinguishing systems, aerosol fire extinguishing devices, and liquid nitrogen fire extinguishing and explosion suppression devices. While perfluorohexanone, heptafluoropropane, and aerosol fire extinguishing systems can meet daily lithium battery fire extinguishing needs, they are prone to causing damage to equipment after spraying, and also suffer from slow cooling rates, insignificant explosion suppression effects, and a tendency to cause secondary combustion and explosion. Therefore, liquid nitrogen has been adopted as a fire extinguishing agent, as it can rapidly cool the battery and suppress reignition. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a liquid nitrogen spray fire extinguishing robot.

[0005] To solve the above problems, the technical solution adopted by this invention is as follows: a liquid nitrogen jet fire extinguishing robot, comprising: a cabinet, with casters installed at the bottom of the cabinet to allow it to be moved; a liquid nitrogen insulating gas cylinder, a high-pressure driving gas cylinder, and a refrigeration unit installed inside the cabinet; the refrigeration unit is installed on top of the liquid nitrogen insulating gas cylinder to remove heat from the liquid nitrogen insulating gas cylinder and reduce evaporation; the high-pressure driving gas cylinder is connected to the liquid nitrogen insulating gas cylinder through a gas supply pipeline; the invention is characterized by: a remotely controllable fire extinguishing trolley, the frame plate of which can be remotely raised and lowered; the fire extinguishing trolley can move to below the bottom of the cabinet; and when the frame plate of the fire extinguishing trolley is raised, it can lift the cabinet, thus... The cabinet can be quickly moved using a fire extinguishing cart. The fire extinguishing cart is equipped with a liquid nitrogen injection pipeline located under the frame plate. The liquid nitrogen injection pipeline has several spray nozzles that can spray liquid upwards. The frame plate has avoidance holes to allow the spray nozzles to pass. After the fire extinguishing cart and the cabinet are separated, they can be remotely drilled into the bottom of the burning object. The outlet of the liquid nitrogen insulation cylinder is connected to the handheld spray gun and the liquid nitrogen injection pipeline on the fire extinguishing cart via hoses. The high-pressure driving cylinder can provide high-pressure nitrogen to the liquid nitrogen insulation cylinder. Under high pressure, the liquid nitrogen in the liquid nitrogen insulation cylinder can be sprayed out from the handheld spray gun or the spray nozzle of the liquid nitrogen injection pipeline. The sprayed liquid nitrogen can be used for fire extinguishing and explosion suppression.

[0006] Furthermore, in the aforementioned liquid nitrogen spray fire extinguishing robot, the liquid nitrogen spray pipeline structure includes: a main inlet pipe and several branch inlet pipes. One end of the main inlet pipe is provided with a liquid inlet interface, which is connected to the liquid outlet of the liquid nitrogen insulation cylinder through a hose. One end of each branch inlet pipe is closed, and the other end of each branch inlet pipe is connected to the other end of the main inlet pipe. The branch inlet pipes are arranged side by side at intervals, and each branch inlet pipe is provided with several spray pipes connected to it.

[0007] Furthermore, in the aforementioned liquid nitrogen spray fire extinguishing robot: each clearance hole has a countersunk hole at its top, a sealing gasket and a nut are placed in each countersunk hole, each spray pipe passes through the corresponding clearance hole, and its top is threadedly connected to the corresponding nut. The top of each spray pipe and the nut thereon are both lower than the upper surface of the frame plate. After tightening each nut, the liquid nitrogen spray pipe can be fixed below the frame plate, and each nut can press the sealing gasket below it to seal the clearance hole.

[0008] Furthermore, in the aforementioned liquid nitrogen spray fire extinguishing robot, the fire extinguishing vehicle's wheels are Mecanum wheels, enabling the fire extinguishing vehicle to move in all directions.

[0009] Furthermore, in the aforementioned liquid nitrogen jet fire extinguishing robot, the refrigeration unit is an orthogonal hybrid pulse tube refrigeration unit.

[0010] Furthermore, the aforementioned liquid nitrogen spray fire extinguishing robot is also equipped with a smoke sensor and a temperature sensor, and an alarm and a controller are installed on the cabinet. The controller is used to control the spraying of liquid nitrogen, and the smoke sensor, temperature sensor, alarm and controller are connected in communication.

[0011] The advantages of this invention are as follows: In the liquid nitrogen jet fire extinguishing robot, when the controller detects a fire through data from the smoke sensor and temperature sensor, the alarm will sound. The controller can control the pneumatic shut-off valve on the gas supply line of the high-pressure drive cylinder and the pneumatic shut-off valve on the liquid nitrogen insulated cylinder outlet to open. The high-pressure nitrogen in the high-pressure drive cylinder enters the liquid nitrogen insulated cylinder after being depressurized by the pressure reducing valve. After opening the shut-off valve on the handheld spray gun or the liquid nitrogen jet pipeline, the liquid nitrogen in the liquid nitrogen insulated cylinder can be sprayed out from the spray pipe of the handheld spray gun or the liquid nitrogen jet pipeline under high pressure. The sprayed liquid nitrogen can be used for fire extinguishing and explosion suppression. The liquid nitrogen jet pipeline can penetrate into the fire area that the handheld spray gun cannot reach, such as under the chassis of an electric vehicle, and the upward sprayed liquid nitrogen can better extinguish and suppress the fire at the lithium battery fire site at the bottom of the car. In addition, the frame plate of the fire extinguishing cart can lift the cabinet after it rises, so that the cabinet can be quickly moved by the fire extinguishing cart. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the liquid nitrogen jet fire extinguishing robot.

[0013] Figure 2 This is a schematic diagram of a liquid nitrogen injection pipeline.

[0014] Figure 3 This is a schematic diagram of the installation structure of the liquid nitrogen injection pipeline in the fire extinguishing vehicle. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0016] like Figure 1 , Figure 2 , Figure 3 As shown, a liquid nitrogen jet fire extinguishing robot includes: a cabinet 1, with casters 2 installed at the bottom of the cabinet 1 to allow it to be moved; a liquid nitrogen insulating cylinder 3, a high-pressure driving cylinder 4, and a refrigeration unit 5 installed inside the cabinet 1; the refrigeration unit 5 is installed on top of the liquid nitrogen insulating cylinder 3 to remove heat from the liquid nitrogen insulating cylinder 3 and reduce evaporation; when not in operation, the refrigeration unit 5 can use its cooling function to dissipate the generated heat through air cooling, thereby maintaining the temperature of the liquid nitrogen in the liquid nitrogen insulating cylinder 3 and reducing liquid nitrogen evaporation; the high-pressure driving cylinder 4 is connected to the liquid nitrogen insulating cylinder 3 through a gas supply pipeline; and a remotely controlled fire extinguishing cart 6 is also provided, with a frame plate 7 on the fire extinguishing cart 6 that can be remotely raised and lowered; the fire extinguishing cart 6 can be moved to below the bottom of the cabinet 1 to extinguish the fire. After the frame plate 7 of vehicle 6 is raised, it can support the cabinet 1, allowing the cabinet 1 to be quickly moved by the fire extinguishing cart 6. The fire extinguishing cart 6 is equipped with a liquid nitrogen injection pipeline 8 located below the frame plate 7. The liquid nitrogen injection pipeline 8 is equipped with eight spray pipes 9 that can spray liquid upwards. The frame plate 7 is equipped with a clearance hole 10 that can avoid the spray pipes 9. After the fire extinguishing cart 6 and the cabinet 1 are separated, it can be remotely drilled into the bottom of the burning object. The outlet of the liquid nitrogen insulation cylinder 3 is connected to the handheld spray gun and the liquid nitrogen injection pipeline 8 on the fire extinguishing cart 6 through hoses. The high-pressure driving cylinder 4 can provide high-pressure nitrogen to the liquid nitrogen insulation cylinder 3. Under high pressure, the liquid nitrogen in the liquid nitrogen insulation cylinder 3 can be sprayed out from the handheld spray gun or the spray pipe 9 of the liquid nitrogen injection pipeline 8. The sprayed liquid nitrogen can be used for fire extinguishing and explosion suppression. The fire extinguishing vehicle 6 is an existing remote-controlled vehicle. The frame plate 7 on the fire extinguishing vehicle 6 is used to support the cabinet 1. The frame plate 7 can be raised and lowered by an existing electric lifting mechanism.

[0017] In this embodiment, the liquid nitrogen injection pipeline 8 includes a main inlet pipe 11 and two branch inlet pipes 12. One end of the main inlet pipe 11 has a liquid inlet port, which is connected to the outlet of the liquid nitrogen insulation cylinder 3 via a flexible hose. One end of each branch inlet pipe 12 is closed, and the other end of each branch inlet pipe 12 is connected to the other end of the main inlet pipe 11. The branch inlet pipes 12 are arranged side-by-side at intervals, and each branch inlet pipe 12 is equipped with four connected injection pipes 9. The outer side of the liquid nitrogen injection pipeline 8 is covered with an insulation layer 16.

[0018] Each clearance hole 10 has a countersunk hole 13 at its top, and a sealing gasket 15 and a nut 14 are placed in each countersunk hole 13. Each liquid injection pipe 9 passes through its corresponding clearance hole 10, and its top is threadedly connected to the corresponding nut 14. The top of each liquid injection pipe 9 and the nut 14 thereon are both lower than the upper surface of the frame plate 7. After tightening each nut 14, the liquid nitrogen injection pipe 8 can be fixed below the frame plate 7, and each nut 14 can press the sealing gasket 15 below it to seal the clearance hole 10. The sealing gasket 15 effectively prevents the sprayed liquid nitrogen from flowing into the fire extinguishing vehicle 6 along the clearance hole 10.

[0019] The fire extinguishing vehicle 6 uses Mecanum wheels, which enable it to move in all directions and perform complex movements such as forward, backward, lateral, diagonal and rotation without the need for a steering mechanism.

[0020] The refrigeration unit is an orthogonal hybrid pulse tube refrigeration unit, model LC4792, manufactured by Zhongke Lihan (Shenzhen) Cryogenic Technology Co., Ltd. Compared with the refrigeration modes of existing refrigeration units, the orthogonal hybrid pulse tube refrigeration unit can better control the evaporation rate of the liquid nitrogen insulation cylinder 3, ensuring that there is sufficient usable liquid nitrogen in the liquid nitrogen insulation cylinder 3 for a long time.

[0021] To enable faster fire detection, smoke and temperature sensors are installed. An alarm and controller are installed on cabinet 1. The controller controls the release of liquid nitrogen. The smoke and temperature sensors, alarm, and controller are connected in communication. When the controller detects a fire through the data from the smoke and temperature sensors, the alarm will sound.

[0022] During operation, when the controller detects a fire through data from the smoke sensor and temperature sensor, the alarm will sound. The controller can control the pneumatic shut-off valve on the gas supply line of the high-pressure driving cylinder 4 and the pneumatic shut-off valve on the liquid nitrogen insulated cylinder 3 to open. The high-pressure nitrogen in the high-pressure driving cylinder 4 is depressurized by the pressure reducing valve and enters the liquid nitrogen insulated cylinder 3. After opening the shut-off valve on the handheld spray gun or the liquid nitrogen injection line 8, the liquid nitrogen in the liquid nitrogen insulated cylinder 3 can be sprayed out from the spray pipe 9 of the handheld spray gun or the liquid nitrogen injection line 8 under high pressure. The sprayed liquid nitrogen can be used for fire extinguishing and explosion suppression. The liquid nitrogen injection line 8, driven by the fire extinguishing cart 6, can penetrate into the fire area that the handheld spray gun cannot reach, such as under the chassis of an electric vehicle. The upward spray of liquid nitrogen can better extinguish and suppress the fire at the lithium battery fire site under the car.

Claims

1. A liquid nitrogen jet fire extinguishing robot, comprising: The cabinet has casters at the bottom for easy movement. Inside, it houses a liquid nitrogen insulation cylinder, a high-pressure drive cylinder, and a refrigeration unit. The refrigeration unit, mounted on top of the liquid nitrogen insulation cylinder, removes heat from the cylinder to reduce evaporation. The high-pressure drive cylinder is connected to the liquid nitrogen insulation cylinder via a supply line. The cabinet is characterized by a remotely controlled fire extinguishing trolley. The trolley's frame can be remotely raised and lowered, allowing it to move to a position below the cabinet. Raising the frame lifts the cabinet, enabling rapid relocation. The vehicle is equipped with a liquid nitrogen injection pipeline located below the chassis plate. The liquid nitrogen injection pipeline has several spray nozzles that can spray liquid upwards. The chassis plate has avoidance holes to allow the spray nozzles to pass. After the fire extinguishing cart and the cabinet are separated, it can be remotely drilled into the bottom of the burning object. The outlet of the liquid nitrogen insulation cylinder is connected to the liquid nitrogen injection pipeline on the handheld spray gun and the fire extinguishing cart through hoses. The high-pressure driving cylinder can provide high-pressure nitrogen to the liquid nitrogen insulation cylinder. Under high pressure, the liquid nitrogen in the liquid nitrogen insulation cylinder can be sprayed out from the spray nozzle of the handheld spray gun or the liquid nitrogen injection pipeline. The sprayed liquid nitrogen can be used for fire extinguishing and explosion suppression.

2. The liquid nitrogen jet fire extinguishing robot according to claim 1, characterized in that: The structure of the liquid nitrogen injection pipeline includes: a main inlet pipe and several branch inlet pipes. One end of the main inlet pipe is equipped with a liquid inlet interface, which is connected to the liquid outlet of the liquid nitrogen insulation cylinder through a hose. One end of each branch inlet pipe is closed, and the other end of each branch inlet pipe is connected to the other end of the main inlet pipe. The branch inlet pipes are arranged side by side at intervals, and each branch inlet pipe is equipped with several injection pipes connected to it.

3. A liquid nitrogen jet fire extinguishing robot according to claim 1 or 2, characterized in that: Each clearance hole has a countersunk hole at its top, and a sealing gasket and nut are placed in each countersunk hole. Each liquid injection pipe passes through its corresponding clearance hole, and its top is threaded to the corresponding nut. The top of each liquid injection pipe and the nut on it are lower than the upper surface of the frame plate. After tightening each nut, the liquid nitrogen injection pipe can be fixed under the frame plate, and each nut can press the sealing gasket below it to seal the clearance hole.

4. A liquid nitrogen jet fire extinguishing robot according to claim 1 or 2, characterized in that: The fire extinguishing vehicle uses Mecanum wheels, which allows it to move in all directions.

5. A liquid nitrogen jet fire extinguishing robot according to claim 1 or 2, characterized in that: The refrigeration unit is an orthogonal hybrid pulse tube refrigeration unit.

6. A liquid nitrogen jet fire extinguishing robot according to claim 1 or 2, characterized in that: It is also equipped with smoke sensors and temperature sensors, and an alarm and controller are installed on the cabinet. The controller is used to control the liquid nitrogen spray. The smoke sensors, temperature sensors, alarm and controller are connected to each other.

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