Improved fire fighting tow hook structure for electric vehicles

Abstract

The utility model belongs to the technical field of fire fighting apparatus, especially is involved in an improved fire fighting hook structure for electric vehicle. The combined hook lance is composed of hollow metal conical seat, sliding rail, tow hook, injection hole seat and penetrating cone. The sliding rail is welded to the outer surface of the hollow metal conical seat, the tow hook is connected to the sliding rail through bolts, the hollow metal conical seat is provided with the injection hole seat which is in communication with the hollow, and the penetrating cone is screwed to the upper end of the injection hole seat. The fire fighting hook is designed with hollow pipeline, which can quickly inject special fire extinguishing agent after piercing the battery pack shell, accurately extinguish the fire source and prevent the fire from rekindling. The hollow structure is integrated with an insulation layer, effectively preventing electric shock risk and significantly improving rescue safety and efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of fire-fighting equipment technology, and in particular relates to an improved fire-fighting tow hook structure for electric vehicles. Background Technology

[0002] With the rapid increase in the number of electric vehicles, lithium battery fires are occurring frequently, posing a serious challenge to fire rescue efforts. Traditional fire hooks are mainly used for breaking down or clearing obstacles, but they have revealed significant shortcomings in electric vehicle fires:

[0003] 1. Lack of fire extinguishing function: Traditional fire hooks are only mechanical demolition tools and cannot directly participate in fire extinguishing. Electric vehicle battery fires usually require rapid cooling or internal injection of fire extinguishing agents to suppress thermal runaway.

[0004] 2. Low demolition efficiency: The battery pack casing is sturdy and concealed, making it difficult for ordinary hooks to penetrate quickly, thus delaying the opportunity to extinguish the fire.

[0005] 3. High safety risks: The metal hook may be conductive and cannot block the spread of high voltage or battery heat, increasing the risk to rescuers.

[0006] To address the aforementioned issues, there is an urgent need for an improved fire hook structure for electric vehicles, which can achieve coordinated demolition and firefighting operations through an internal channel design. Utility Model Content

[0007] To address the shortcomings and deficiencies of existing technologies, the purpose of this utility model is to provide an improved fire hook structure for electric vehicles that is simple in structure, rationally designed, and easy to use. This fire hook adopts a hollow pipe design, which allows for the rapid injection of a special fire extinguishing agent after piercing the battery pack shell, accurately extinguishing the fire source and preventing reignition. The hollow structure integrates an insulation layer, effectively preventing the risk of electric shock and significantly improving the safety and efficiency of rescue.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes an insulating operating rod and a combined hook spear; the front end of the insulating operating rod is connected to the combined hook spear via a threaded sealing ring; wherein, the combined hook spear consists of a hollow metal conical seat, a sliding rail, a drag hook, a spray hole seat, and an insertion cone; the outer surface of the hollow metal conical seat is welded with a sliding rail, and a drag hook is bolted into the sliding rail; the upper end of the hollow metal conical seat is provided with a spray hole seat that communicates with the hollow interior, and an insertion cone is screwed onto the upper end of the spray hole seat.

[0009] Preferably, the insulating operating rod has a hollow structure, and a high-pressure hose is inserted inside the insulating operating rod. The tail end of the high-pressure hose is connected to the connecting seat on the side wall of the tail end of the insulating operating rod, the head end of the high-pressure hose is connected to the connecting threaded seat at the top of the insulating operating rod, and the tail end of the insulating operating rod is connected to a grip handle.

[0010] Preferably, the sliding track is internally fitted with a fixed slider, and the lower end of the sliding track is connected to a support spring.

[0011] Preferably, the injection hole seat and the hollow metal conical seat are an integral structure, and the top of the injection hole seat is welded with a connecting screw, which is connected to the insertion cone by screwing.

[0012] Preferably, the interpenetrating cone has a conical structure or a flat prismatic structure.

[0013] Preferably, the connecting base is connected to a backpack-type battery-powered fire extinguisher.

[0014] The beneficial effects of this utility model after adopting the above structure are as follows:

[0015] 1. Multifunctional integrated design: The hooking and pulling characteristics of traditional fire hooks are retained, which can be used to quickly remove obstacles, drag burning parts or fix vehicle structures to prevent the spread of fire;

[0016] The hook head features a high-strength, sharp design that can easily pierce the outer shell of an electric vehicle battery pack or the protective layer of high-voltage components, allowing for precise fire extinguishing directly at internal sources of fire.

[0017] 2. Highly efficient fire extinguishing and suppression of reignition: The hollow design of the hook connects to the fire extinguishing agent delivery system (such as high-pressure water pipe, perfluorohexanone, or dry powder fire extinguishing agent). After puncture, the fire extinguishing agent is injected immediately, which quickly cools the battery cells and blocks the thermal runaway chain reaction. Compared with external spraying of fire extinguishing agents, internal injection can penetrate to the deep layers of the battery pack more effectively, significantly reducing the probability of reignition.

[0018] 3. Optimized safety performance: The hook body is made of composite materials (such as glass fiber reinforced resin) to avoid the risk of metal conduction and ensure the safety of rescue personnel.

[0019] 4. Easy to operate and quick to respond: Demolition and fire extinguishing can be carried out simultaneously, reducing tool switching time, especially suitable for the rapid disposal of concealed structures such as electric vehicle battery compartments; it can be equipped with portable pressure tanks or fire truck pipelines to flexibly adapt to different rescue scenarios. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, this utility model will be described in detail below with reference to the specific implementation and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the insulating operating rod 1 of this utility model;

[0023] Figure 3This is a schematic diagram of the combined hook and spear 2 structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the combined hook spear 2 structure of this utility model. Figure 2 ;

[0025] Explanation of reference numerals in the attached drawings: 1. Insulated operating rod; 2. Combined hook spear; 3. Grip handle; 4. High-pressure hose; 5. Connecting seat; 6. Connecting threaded seat; 7. Hollow metal conical seat; 8. Sliding rail; 9. Dragging hook; 10. Spray hole seat; 11. Inserting cone; 12. Top support spring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0027] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0028] See Figures 1-4 As shown, this specific embodiment adopts the following technical solution: It includes an insulated operating rod 1 and a combined hook spear 2; the front end of the insulated operating rod 1 is connected to the combined hook spear 2 via a threaded sealing ring; wherein, the combined hook spear 2 is composed of a hollow metal conical seat 7, a sliding rail 8, a drag hook 9, a spray hole seat 10, and an insertion cone 11; the outer surface of the hollow metal conical seat 7 is welded with the sliding rail 8, and the drag hook 9 is connected to the sliding rail 8 via bolts; the upper end of the hollow metal conical seat 7 is provided with a spray hole seat 10 that communicates with the hollow interior, and the upper end of the spray hole seat 10 is screwed with an insertion cone 11. The insulated operating rod 1 is made of high-strength glass fiber reinforced epoxy resin, which has excellent insulation performance (withstanding voltage ≥20kV), the rod body is a hollow structure and integrates a high-pressure hose 4, the tail is connected to an ergonomic grip handle 3, and the front end is securely connected to the combined hook spear 2 via a threaded sealing ring;

[0029] The insulating operating rod 1 has a hollow structure, and a high-pressure hose 4 is inserted inside the insulating operating rod 1. The tail of the high-pressure hose 4 is connected to the connecting seat 5 on the side wall of the tail of the insulating operating rod 1, and the head of the high-pressure hose 4 is connected to the connecting threaded seat 6 at the top of the insulating operating rod 1. The tail of the insulating operating rod 1 is connected to the grip handle 3. The high-pressure hose 4 is lined with a polytetrafluoroethylene coating (pressure resistance ≥10MPa) and connected to a backpack-type battery-specific fire extinguisher. After puncture, the extinguishing agent is sprayed in multiple directions through the hollow rod body and the spray hole seat from the side hole at the root of the inserted cone, achieving rapid and accurate fire extinguishing.

[0030] Furthermore, a fixed slider is movably engaged inside the sliding track 8, and a top support spring 12 is connected to the lower end of the sliding track 8. The hollow metal conical seat 7 of the combined hook spear 2 is forged from high-strength titanium alloy, possessing both lightweight and high-temperature resistance (melting point > 1600℃). The sliding track 8 welded to its outer surface is equipped with a drag hook 9 that achieves elastic extension and retraction through the top support spring 12. The surface of the drag hook is plated with hard chrome (hardness HRC60 or higher) to ensure durability. The injection hole seat 10 is integrally formed with the conical seat and is screwed onto the insertion cone 11 via a connecting screw. The insertion cone is made of tungsten carbide alloy (hardness HRA90) with a cone + prism composite structure, which can quickly penetrate a 10mm thick steel plate.

[0031] Furthermore, the spray nozzle seat 10 and the hollow metal conical seat 7 are an integral structure, and a connecting screw is welded to the top of the spray nozzle seat 10, which is connected to the insertion cone 11 by screwing. The insertion cone 11 has a conical structure and a flat prismatic structure. The connecting seat 5 connects to the backpack-type battery-specific fire extinguisher. The battery-specific fire extinguisher is a special fire-fighting device developed for the thermal runaway characteristics of lithium-ion batteries. Its core feature is the use of special extinguishing media such as perfluorohexanone and fine water mist, which achieve rapid cooling and fire extinguishing through a high-pressure spray system.

[0032] The working principle of this specific implementation is as follows: After piercing the battery pack casing, the hook can directly inject extinguishing agents (such as perfluorohexanone, water mist, etc.) through a hollow pipe to precisely suppress the fire source and prevent reignition. Furthermore, the hollow structure can integrate insulating materials, reducing the risk of electric shock and improving rescue efficiency and safety. This innovative design fills a functional gap in existing firefighting tools for electric vehicle fires.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An improved fire-fighting tow hook structure for electric vehicles, characterized in that: It includes an insulated operating rod and a combined hook spear; the front end of the insulated operating rod is connected to the combined hook spear via a threaded sealing ring; wherein, the combined hook spear consists of a hollow metal conical seat, a sliding rail, a drag hook, a spray hole seat, and an insertion cone; the outer surface of the hollow metal conical seat is welded with a sliding rail, and a drag hook is bolted into the sliding rail; the upper end of the hollow metal conical seat is provided with a spray hole seat that communicates with the hollow interior, and an insertion cone is screwed onto the upper end of the spray hole seat.

2. The improved fire hook structure for electric vehicles according to claim 1, characterized in that: The insulating operating rod has a hollow structure, and a high-pressure hose is inserted inside the insulating operating rod. The tail end of the high-pressure hose is connected to the connecting seat on the side wall of the tail end of the insulating operating rod, and the head end of the high-pressure hose is connected to the connecting threaded seat at the top of the insulating operating rod. The tail end of the insulating operating rod is connected to a grip handle.

3. The improved fire hook structure for electric vehicles according to claim 1, characterized in that: The sliding track is internally fitted with a fixed slider, and the lower end of the sliding track is connected to a support spring.

4. The improved fire hook structure for electric vehicles according to claim 1, characterized in that: The injection hole seat and the hollow metal cone seat are an integral structure, and the top of the injection hole seat is welded with a connecting screw, which is connected to the insertion cone by screwing.

5. An improved fire hook structure for electric vehicles according to claim 4, characterized in that: The interpenetrating cone has a conical structure and a flat prismatic structure.

6. An improved fire-fighting tow hook structure for electric vehicles according to claim 2, characterized in that: The connecting base is used to connect to a backpack-type battery-powered fire extinguisher.

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