Mobile nitrogen injection device

Abstract

The utility model relates to fire fighting tool technical field discloses mobile nitrogen injection device, including frame and liquid nitrogen tank, the top of frame is fixed with the support frame matched with liquid nitrogen tank, and the support frame is arranged obliquely, the liquid nitrogen tank is placed in the one side of support frame, the top of frame and be located below support frame fixedly arranged liquid nitrogen vaporizer, the liquid outlet end of liquid nitrogen tank is connected with the liquid inlet end of liquid nitrogen vaporizer through connecting hose, the gas outlet hose is fixedly arranged in the gas outlet end of liquid nitrogen vaporizer, the utility model integrates liquid nitrogen tank, vaporizer, pipeline winding and unwinding mechanism and mobile frame in one, compact structure, through the setting of moving wheel and universal wheel, whole device can be easily, fastly pushed to fire accident scene, especially suitable for narrow or complex rescue passage, greatly shortens the emergency response time, and gains the precious time for the fire fighting of lithium battery etc.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting tools technology, specifically a mobile nitrogen injection device. Background Technology

[0002] With the rapid development of the new energy industry, lithium-ion batteries are widely used in electric vehicles, energy storage power stations (such as energy storage cabinets) and other fields due to their high energy density. However, lithium-ion batteries are prone to thermal runaway under abuse conditions such as overheating and short circuits, which can lead to fires or even explosions. Furthermore, their internal chemical reactions are intense, making it difficult for traditional water-based fire extinguishing agents to effectively penetrate and cool them, resulting in global challenges such as easy reignition and difficulty in firefighting. Liquid nitrogen, as an inert, ultra-low temperature (boiling point -196℃) medium, can not only rapidly lower the ambient temperature but also isolate oxygen and inhibit combustion reactions. It has significant advantages in extinguishing lithium battery fires and preventing reignition, and has become a highly effective fire extinguishing coolant that has attracted much attention.

[0003] In current emergency rescue practices, when using liquid nitrogen for cooling and fire extinguishing, fixed liquid nitrogen storage tanks are typically used in conjunction with temporarily laid pipelines or mobile Dewar flasks. These methods present several problems: First, fixed liquid nitrogen supply systems cannot be moved, delaying valuable initial fire extinguishing time; transporting standard Dewar flasks is laborious and time-consuming, and there is a risk of tipping over on bumpy roads, posing a significant safety hazard. Second, the chaotic situation at the fire scene makes long delivery hoses prone to tangling, being punctured by sharp objects, or melting due to high temperatures, leading to liquid nitrogen leaks, affecting fire extinguishing efficiency, and even causing danger. For precise cooling, such as when continuously aiming the nitrogen nozzle at the pressure relief valve of the energy storage cabinet or key parts of the battery pack, operators must handle the nitrogen at close range, resulting in high labor intensity and exposure to high temperatures, explosions, and asphyxiation risks. Existing devices lack a method for quickly moving and stably fixing liquid nitrogen tanks and securely securing the outlet to the target location. Utility Model Content

[0004] The purpose of this invention is to provide a mobile nitrogen injection device that is easy to move, provides stable support, and is safe to operate.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a mobile nitrogen injection device, including a frame and a liquid nitrogen tank, wherein a support frame matching the liquid nitrogen tank is fixedly provided at the top of the frame, the support frame is inclined, the liquid nitrogen tank is placed on one side of the support frame, a liquid nitrogen vaporizer is fixedly provided at the top of the frame and below the support frame, the liquid outlet of the liquid nitrogen tank is connected to the liquid inlet of the liquid nitrogen vaporizer through a connecting hose, an outlet hose is fixedly provided at the outlet of the liquid nitrogen vaporizer, a winding drum is provided above the frame and on one side of the liquid nitrogen vaporizer, an outlet head is fixedly provided at the end of the outlet hose, and two corresponding clamps are provided on the surface of the outlet head.

[0006] A further feature of this invention is that an axle is fixedly provided on one side of the frame, and movable wheels are rotatably installed at both ends of the axle; and a universal wheel is provided on the other side of the bottom of the frame.

[0007] A further feature of this invention is that a limiting plate is welded to the bottom of the support frame, a push rod is welded to the top of the support frame, an arc-shaped support plate corresponding to the liquid nitrogen tank is fixedly provided at the bottom of the support frame, and a reinforcing column is welded between the support frame and the vehicle frame.

[0008] A further feature of this invention is that: a rotating seat is fixedly provided at the bottom of the support frame on both sides, and a limiting plate is rotatably provided inside the rotating seat via a connecting shaft. The limiting plate is set in an arc shape corresponding to the liquid nitrogen tank, and a connecting hole is provided on the side of the limiting plate. When the two limiting plates are closed, two adjacent connecting holes are connected by a connecting bolt.

[0009] A further feature of this invention is that two mounting plates are fixedly provided at the top of the frame and on one side of the liquid nitrogen vaporizer, the top of the mounting plates is provided with through holes, mounting posts are fixedly provided at the middle of both ends of the winding drum, and the ends of the mounting posts pass through the through holes and are fixedly provided with rollers.

[0010] A further feature of this invention is that the portion of the mounting post that passes through the through hole is provided with an external thread, and the surface of the mounting post is provided with two locking nuts located on both sides of the mounting plate, and the locking nuts are threadedly engaged with the external thread.

[0011] A further feature of this invention is that the end of the air outlet head is provided with multiple air outlet holes.

[0012] A further feature of this invention is that: the surface of the air outlet is provided with a guide rod via a damping bearing, the guide rod is slidably connected to the clamping plate, a limiting plate is fixedly provided at the end of the guide rod, and a limiting spring is installed between the limiting plate and the clamping plate.

[0013] A further feature of this invention is that the clamping plates are L-shaped, and grooves are provided at the contact ends of the two clamping plates.

[0014] In summary, this utility model has the following beneficial effects: It integrates a liquid nitrogen tank, vaporizer, pipeline retraction mechanism, and mobile frame into a compact structure. With the addition of casters and swivel casters, the entire device can be easily and quickly moved to the scene of a fire, making it particularly suitable for narrow or complex rescue passages. This significantly shortens emergency response time, providing valuable time for extinguishing fires involving lithium batteries, etc. The inclined support frame, bottom limiting plate, and rotatable, closable arc-shaped limiting plate together form multiple locking protections for the liquid nitrogen tank, ensuring that even during rapid movement on bumpy roads, the tank can be effectively prevented from shaking, tipping, or falling, completely eliminating major safety hazards during transportation and ensuring the safety of rescue personnel. The spring-loaded vent hose wound around the take-up drum, combined with a lockable rotating wheel structure, enables convenient retraction and standardized management of the delivery hose. When in use, it can be quickly extended to the required length and easily retrieved after use, effectively avoiding problems such as hoses scattering, tangling, and knotting in traditional operations, improving work efficiency, and preventing hoses from being damaged by being stepped on or crushed. The gas outlet can be firmly clamped to the energy storage cabinet door frame, battery box, or other objects that need cooling through an L-shaped clamp device with a spring self-locking function, realizing remote fixation and unattended continuous nitrogen injection cooling. This not only frees rescuers from the dangerous near end of the fire scene, avoiding the risks of high temperature, explosion, and suffocation, but also ensures that the nitrogen injection nozzle is always aimed at the core of the fire source or key parts such as pressure relief valves, with stable and uniform cooling direction, greatly improving the effect of fire extinguishing and preventing reignition. Attached Figure Description

[0015] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model; Figure 2 This is the second three-dimensional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention after the limiting plate is opened; Figure 4 This is a schematic diagram of the disassembled liquid nitrogen tank of this utility model; Figure 5 This is a partial structural schematic diagram of the winding drum of this utility model; Figure 6 This utility model Figure 5 A magnified structural diagram at point A.

[0016] In the diagram: 1. Frame; 101. Axle; 102. Transfer wheel; 103. Caster wheel; 2. Support frame; 201. Limiting plate; 202. Push rod; 203. Rotating seat; 204. Limiting plate; 205. Connecting shaft; 206. Connecting hole; 207. Connecting bolt; 3. Liquid nitrogen tank; 301. Connecting hose; 4. Liquid nitrogen vaporizer; 5. Mounting plate; 501. Through hole; 502. Rewind drum; 503. Mounting column; 504. Rotating wheel; 505. Locking nut; 506. Vent hose; 507. Vent head; 508. Vent hole; 509. Guide rod; 5010. Limiting plate; 5011. Clamping plate; 5012. Limiting spring. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings of the embodiments thereof.

[0018] Please see Figures 1-6 In this embodiment of the invention, the mobile nitrogen injection device includes a frame 1 and a liquid nitrogen tank 3. A support frame 2 matching the liquid nitrogen tank 3 is fixedly mounted on the top of the frame 1. The support frame 2 is inclined, and the liquid nitrogen tank 3 is placed on one side of the support frame 2. A liquid nitrogen vaporizer 4 is fixedly mounted on the top of the frame 1 and below the support frame 2. The liquid outlet of the liquid nitrogen tank 3 is connected to the liquid inlet of the liquid nitrogen vaporizer 4 via a connecting hose 301. An outlet hose 506 is fixedly mounted on the outlet of the liquid nitrogen vaporizer 4. A winding drum 502 is located above the frame 1 and on one side of the liquid nitrogen vaporizer 4. The outlet hose 506 is wound in a spring-like shape around the surface of the winding drum 502. The winding drum 502 can wind up any excess outlet hose 506, preventing the outlet hose 506 from becoming tangled due to excessive length. The end of the vent hose 506 is fixedly equipped with a vent head 507. The end of the vent head 507 is provided with multiple vent holes 508, so that the liquid nitrogen vaporized can be sprayed evenly through the vent holes 508, achieving a better cooling effect. The surface of the vent head 507 is provided with two corresponding clamps 5011. The two corresponding clamps 5011 can be used to clamp the vent head 507 onto the object being cooled or the box, preventing the vent head 507 from falling off. The vent head 507 can be firmly clamped onto the energy storage cabinet door frame, battery box, or other objects that need to be cooled, realizing remote fixation and unattended continuous nitrogen injection cooling. This not only frees rescuers from the dangerous near end of the fire scene, avoiding the risks of high temperature, explosion, and suffocation, but also ensures that the nitrogen injection nozzle is always aimed at the core of the fire source or key parts such as the pressure relief valve.

[0019] In this embodiment, preferably, an axle 101 is fixedly provided on one side of the frame 1, and movable wheels 102 are rotatably installed at both ends of the axle 101. A universal wheel 103 is provided on the other side of the bottom of the frame 1. By utilizing the cooperation between the movable wheel 102 and the universal wheel 103, the entire device can be easily and quickly moved to the scene of a fire accident. It is particularly suitable for narrow or complex rescue passages, greatly shortening the emergency response time and buying valuable time for extinguishing fires such as those involving lithium batteries. In this embodiment, preferably, a limiting plate 201 is welded to the bottom end of the support frame 2. The limiting plate 201 can support the bottom of the liquid nitrogen tank 3 and prevent the liquid nitrogen tank 3 from falling. A push rod 202 is welded to the top of the support frame 2, which can facilitate the movement of the device. An arc-shaped support plate corresponding to the liquid nitrogen tank 3 is fixedly provided at the bottom of the support frame 2 to provide stable support for the liquid nitrogen tank 3. A reinforcing column is welded between the support frame 2 and the vehicle frame 1 to increase the support stability of the support frame 2. In this embodiment, preferably, the bottom of the support frame 2 is fixedly provided with rotating seats 203 on both sides. The interior of the rotating seats 203 is provided with limiting plates 204 through connecting shafts 205. The limiting plates 204 are set in an arc shape corresponding to the liquid nitrogen tank 3. The sides of the limiting plates 204 are provided with connecting holes 206. When the two limiting plates 204 are closed, the two adjacent connecting holes 206 are connected by connecting bolts 207. The two limiting plates 204 limit the position of the liquid nitrogen tank 3 after placement, which further plays a protective role. It ensures that even if the liquid nitrogen tank 3 is moved quickly on a bumpy road, it can effectively prevent the liquid nitrogen tank 3 from shaking, tipping over or falling, completely eliminating major safety hazards during transportation and ensuring the safety of rescue personnel. In this embodiment, preferably, two mounting plates 5 are fixedly provided at the top of the frame 1 and on one side of the liquid nitrogen vaporizer 4. The top of the mounting plate 5 is provided with a through hole 501. Mounting posts 503 are fixedly provided at the middle of both ends of the take-up drum 502. The end of the mounting post 503 passes through the through hole 501 and is fixedly provided with a rotating wheel 504. The rotating wheel 504 can drive the mounting post 503 to rotate, thereby driving the take-up drum 502 to rotate and retract the air outlet hose 506. In this embodiment, preferably, the portion of the mounting post 503 that penetrates the through hole 501 is provided with external threads, and the surface of the mounting post 503 is provided with two locking nuts 505 located on both sides of the mounting plate 5. The locking nuts 505 are threadedly engaged with the external threads. The threaded engagement between the locking nuts 505 and the external threads on the surface of the mounting post 503 can limit the position of the winding drum 502, so that the rotation of the winding drum 502 has a certain damping force, preventing the winding drum 502 from rotating and causing the air outlet hose 506 to fall off. In this embodiment, preferably, the surface of the air outlet 507 is provided with a guide rod 509 via a damping bearing. The guide rod 509 is slidably connected to the clamping plate 5011. A limiting plate 5010 is fixedly provided at the end of the guide rod 509, which limits the movement of the clamping plate 5011 and prevents the guide rod 509 from falling off the clamping plate 5011. A limiting spring 5012 is installed between the limiting plate 5010 and the clamping plate 5011. The elasticity of the limiting spring 5012 can make the two clamping plates 5011 clamp more securely, making it less likely to fall off, and does not interfere with the movement of the clamping plates 5011, making it easy to load and unload. The clamping plate 5011 is L-shaped, and a groove is provided at the contact end of the two clamping plates 5011 to not interfere with the air outlet 508.

[0020] When in use, if a battery or energy storage cabinet fire occurs and emergency cooling is required, the operator first pushes the push rod 202 welded to the top of the support frame 2, and uses the moving wheel 102 installed on the axle 101 on one side of the frame 1 and the universal wheel 103 set on the other side of the bottom of the frame 1 to quickly move the entire device to a safe area near the accident site. Subsequently, the operator loosens the locking nut 505 on the surface of the mounting post 503 to release the fixation of the winding drum 502. Then, the operator rotates the rotating wheel 504, which drives the mounting post 503 and the winding drum 502 to rotate, thereby releasing the vent hose 506, which is spring-like and wound around the surface of the winding drum 502. The operator pulls the vent head 507 at the end of the vent hose 506 to the battery box or energy storage cabinet that needs cooling. By grasping and squeezing the two corresponding clamps 5011, the operator overcomes the elasticity of the limiting spring 5012, allowing the two... The L-shaped clamps 5011 open and are fastened to the door frame of the box or the preset hanging point. After being released, under the action of the rebound force of the limiting spring 5012, the two clamps 5011 firmly clamp the gas outlet 507 to the target object, realizing remote fixation without the need for manual operation. This enables remote fixation and unattended continuous nitrogen injection cooling, which not only frees rescuers from the dangerous near end of the fire scene, avoiding the risks of high temperature, explosion and suffocation, but also ensures that the nitrogen injection nozzle is always aimed at the core of the fire source or key parts such as the pressure relief valve. After the gas outlet 507 is fixed, the operator can open the control valve of the liquid nitrogen tank 3. Under its own pressure or the action of the built-in pump, the liquid nitrogen is transported to the liquid nitrogen vaporizer 4 through the connecting hose 301. The liquid nitrogen absorbs ambient heat in the liquid nitrogen vaporizer 4, quickly completes the phase change, and vaporizes into room temperature gaseous nitrogen. The high-pressure nitrogen gas then passes through the gas outlet hose 506 and is finally sprayed out evenly and at high speed from the multiple gas outlet holes 508 set at the end of the gas outlet 507. It directly acts on the fire source or the surface of the overheated object. Utilizing the dual effects of nitrogen asphyxiation and ultra-low temperature cooling, the combustion reaction is quickly suppressed and the ambient temperature is reduced to prevent thermal runaway from spreading and reigniting. During operation, the length of the outlet hose 506 can be flexibly controlled by the lockable take-up drum 502 structure, keeping the work site orderly. After the operation is completed, the outlet hose 506 can be rewound onto the take-up drum 502 by rotating the turntable in the opposite direction, making it easy to store and use next time. Throughout the process, the liquid nitrogen tank 3 is firmly locked by the bottom limiting plate 201, the arc-shaped support plate, and the two arc-shaped limiting plates 204 fastened by the connecting bolts 207, ensuring the absolute stability of the tank during movement and operation.

[0021] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A mobile nitrogen injection device, comprising a chassis (1) and a liquid nitrogen tank (3), characterized in that, The top of the frame (1) is fixedly provided with a support frame (2) that matches the liquid nitrogen tank (3). The support frame (2) is inclined. The liquid nitrogen tank (3) is placed on one side of the support frame (2). The top of the frame (1) and below the support frame (2) is fixedly provided with a liquid nitrogen vaporizer (4). The liquid outlet of the liquid nitrogen tank (3) is connected to the liquid inlet of the liquid nitrogen vaporizer (4) through a connecting hose (301). The gas outlet of the liquid nitrogen vaporizer (4) is fixedly provided with a gas outlet hose (506). The top of the frame (1) and on one side of the liquid nitrogen vaporizer (4) is provided with a winding drum (502). The end of the gas outlet hose (506) is fixedly provided with a gas outlet head (507). The surface of the gas outlet head (507) is provided with two corresponding clamps (5011).

2. The mobile nitrogen injection device according to claim 1, characterized in that: A wheel axle (101) is fixedly provided on one side of the frame (1), and a movable wheel (102) is rotatably installed at both ends of the wheel axle (101). A universal wheel (103) is provided on the other side of the bottom of the frame (1).

3. The mobile nitrogen injection device according to claim 1, characterized in that: A limiting plate (201) is welded to the bottom of the support frame (2), a push rod (202) is welded to the top of the support frame (2), an arc-shaped support plate corresponding to the liquid nitrogen tank (3) is fixedly provided at the bottom of the support frame (2), and a reinforcing column is welded between the support frame (2) and the vehicle frame (1).

4. The mobile nitrogen injection device according to claim 1, characterized in that: The bottom of the support frame (2) is fixedly provided with rotating seats (203) on both sides. The interior of the rotating seats (203) is provided with limiting plates (204) through connecting shafts (205). The limiting plates (204) are set in an arc shape corresponding to the liquid nitrogen tank (3). The side of the limiting plates (204) is provided with connecting holes (206). When the two limiting plates (204) are closed, the two adjacent connecting holes (206) are connected by connecting bolts (207).

5. The mobile nitrogen injection device according to claim 1, characterized in that: Two mounting plates (5) are fixedly provided at the top of the frame (1) and on one side of the liquid nitrogen vaporizer (4). The top of the mounting plate (5) is provided with a through hole (501). Mounting posts (503) are fixedly provided at the middle of both ends of the winding drum (502). The end of the mounting post (503) passes through the through hole (501) and is fixedly provided with a rotating wheel (504).

6. The mobile nitrogen injection device according to claim 5, characterized in that: The portion of the mounting post (503) that passes through the through hole (501) is provided with external threads. The surface of the mounting post (503) is provided with two locking nuts (505) located on both sides of the mounting plate (5), and the locking nuts (505) are threadedly engaged with the external threads.

7. The mobile nitrogen injection device according to claim 1, characterized in that: The end of the air outlet (507) is provided with multiple air outlet holes (508).

8. The mobile nitrogen injection device according to claim 1, characterized in that: The surface of the air outlet (507) is provided with a guide rod (509) through a damping bearing. The guide rod (509) is slidably connected to the clamping plate (5011). A limiting plate (5010) is fixedly provided at the end of the guide rod (509). A limiting spring (5012) is installed between the limiting plate (5010) and the clamping plate (5011).

9. The mobile nitrogen injection device according to claim 8, characterized in that: The clamping plate (5011) is L-shaped and has a slot at the contact end of the two clamping plates (5011).

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