Temperature rise aging test device for liquid cooling charging gun

Abstract

The invention relates to the technical field of charging guns, in particular to a liquid cooling charging gun temperature rise aging test device which is characterized in that a charging gun body is inserted into a power supply socket, a carbon dioxide fire extinguisher is arranged on the outer surface of an environment test box, a low-voltage large-current power supply and a switch module are arranged on the side face of a movable frame, and a temperature acquisition module is arranged on the side face of the environment test box. A thermal imager is electrically connected in the temperature acquisition module, and a liquid storage tank, a gear pump, a fin radiator and a liquid supply control unit are arranged on the surface of the supporting table; the charging gun has the beneficial effects that a gear pump is matched with a liquid storage tank to conveniently provide a liquid cooling agent for the charging gun body, control is performed through a liquid supply control unit, and once part of parameters exceed alarm requirements, the system immediately cuts off a switch module, so that a sample is protected from fire risks caused by over-temperature, and a low-voltage high-current power supply is adopted; the charging gun is matched with the switch module to provide test current for the charging gun body, and a sample and all electrical connection points are continuously monitored through the thermal imager.

Description

Technical Field

[0001] The present invention relates to the field of charging guns, and in particular to a temperature rise aging test device for a liquid-cooled charging gun. Background Art

[0002] Liquid-cooled charging gun technology combines a liquid cooling module with a liquid-cooled gun cable. Ethylene glycol or oil flows through the liquid-cooled cable, directly removing heat generated by the cable. This highly efficient heat dissipation method allows small cables to carry high currents while maintaining low temperature rise, improving charging safety. Furthermore, the thinner the cable, the lighter it is, making it more convenient to use and reducing safety risks associated with excessive weight.

[0003] Since this type of charging gun can achieve a larger charging current and shorten the charging time, the reliability requirements for this type of charging gun are also increased. The reliability of the charging gun needs to be tested and verified during the actual R&D and production stages. Since there is no complete set of liquid supply, power supply and protection integrated systems on the market, a separate combination must be built for testing, which has a high safety risk. This device is designed to meet the power-on aging test of liquid-cooled charging guns. While ensuring the test conditions, it adds protective measures to prevent fire risks. Summary of the Invention

[0004] The object of the present invention is to provide a temperature rise aging test device for a liquid-cooled charging gun to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a liquid-cooled charging gun temperature rise aging test device, the liquid-cooled charging gun temperature rise aging test device comprising: a support platform, an environmental test chamber provided on the support platform surface, a guide plate provided within the environmental test chamber, a support plate provided within the environmental test chamber, a power supply socket provided on the support plate surface, a charging gun body inserted into the power supply socket, a connecting tube provided on the side of the charging gun body, a pipe provided within the connecting tube, and a carbon dioxide fire extinguisher provided on the outer surface of the environmental test chamber; A mobile rack is provided with a low-voltage, high-current power supply and a switch module on the side of the mobile rack, and a temperature acquisition module is provided on the side of the environmental test chamber. The temperature acquisition module is electrically connected to a thermal imager; The surface of the support platform is provided with a liquid storage tank, a gear pump, a fin radiator and a liquid supply control unit, and the surface of the support platform is provided with a central control computer; The mounting frame has a fixed pipe on its surface, and a temperature sensor, a flow sensor and a pressure sensor on its surface.

[0006] Preferably, the movable frame is fixedly connected to the surface of the support platform, and two groups of pipes are provided, one end of one group of pipes is connected to the liquid storage tank, and one end of the other group of pipes is connected to the fixed pipe, one end of the fixed pipe is connected to the fin radiator through the infusion pipe, and a pipe heater is provided in the fixed pipe.

[0007] Preferably, the input end of the gear pump is connected to the liquid storage tank via a water pipe, the output end of the gear pump is connected to the water inlet of the fin radiator via a water pipe, the liquid supply control unit is electrically connected to the temperature sensor, flow sensor, pressure sensor and gear pump, and the control core of the liquid supply control unit is PLC control + HMI touch screen and supports Modbus TCP communication and recipe storage functions.

[0008] Preferably, the power supply socket is electrically connected to the switch module and the low-voltage, high-current power supply, the temperature acquisition module and the liquid supply control unit are electrically connected to the low-voltage, high-current power supply, and the central control computer is connected to the low-voltage, high-current power supply, the temperature acquisition module, the gear pump, the carbon dioxide fire extinguisher and the liquid supply control unit via Bluetooth or WiFi.

[0009] Preferably, a placement groove is provided on the surface of the support platform, an electric push rod is provided in the placement groove, a positioning bearing is provided at the telescopic end of the electric push rod, and a mounting rod is fixedly connected to the inner ring surface of the positioning bearing.

[0010] Preferably, a movable port is provided at the bottom of the environmental test box, the end face of the movable port is a "T"-shaped plate structure, an auxiliary plate is provided at the bottom of the support plate, a threaded hole is provided on the side of the auxiliary plate, and one end of the mounting rod is screwed into the threaded hole.

[0011] Preferably, a sealing plate is provided on the side of the auxiliary plate, which is inserted into the movable port and covers the top of the placement groove. The guide plate is a "T"-shaped plate structure. There are two groups of guide plates, and the two groups of guide plates are symmetrically distributed about the movable port. The sealing plate is a "T"-shaped plate structure.

[0012] Preferably, a base plate is provided at the bottom of the support plate, a slide groove is provided on the side of the base plate, the slide groove is a "T"-shaped plate structure, the guide plate is inserted into the slide groove, the guide plate is slidably connected to the slide groove, a sealing port is provided on the side of the environmental test box, the connecting pipe is inserted into the sealing port, the mobile frame is fixedly connected to the side of the connecting pipe, the mobile frame covers the sealing port, and the nozzle of the carbon dioxide fire extinguisher is fixedly connected in the environmental test box.

[0013] Preferably, a limiting groove is provided on the surface of the guide plate, and the limiting groove is a right-angled triangular plate structure when viewed from the side. A traction groove is provided at the bottom of the slide groove, and a rotating rod is provided on the side of the traction groove. The surface of the rotating rod is rotatably connected to a positioning card.

[0014] Preferably, the end face of the positioning card plate is provided with a positioning block, and a metal spring is provided on the surface of the positioning block. One end of the metal spring is fixedly connected to the surface of the positioning block, and the other end of the metal spring is fixedly connected to the upper surface of the traction groove. A groove is provided on the end face of the positioning card plate, and an auxiliary rod is provided on the side of the groove. The surface of the auxiliary rod is rotatably connected to an auxiliary wheel.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The liquid-cooled charging gun temperature rise aging test device proposed in the present invention utilizes a gear pump in conjunction with a liquid storage tank to conveniently provide liquid coolant to the charging gun body when in use, and then provides liquid coolant with a specified flow rate and temperature to the sample by controlling the operation of the gear pump and the pipe heater. It is controlled by a liquid supply control unit. Once some parameters exceed the alarm requirements, the system immediately cuts off the switch module to protect the sample from the risk of overheating and causing fire. A low-voltage, high-current power supply is used in conjunction with the switch module to provide test current for the charging gun body. The sample and all electrical connection points are continuously monitored by a thermal imager. Once the temperature of some positions exceeds the alarm requirements, the system immediately cuts off the switch module to protect the sample from the risk of continuous heating and causing fire. When the sample fails thermally, the carbon dioxide fire extinguisher can be triggered to extinguish the electrical fire in time. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A in the middle is an enlarged structural diagram; Figure 3 It is a side view of the structure of the present invention; Figure 4 This is a schematic diagram of the structure of the present invention when the structure is tilted; Figure 5 It is a top view of the structure of the present invention; Figure 6 It is a partial cross-sectional view of the structure of the present invention; Figure 7 It is a cross-sectional rear side view of the structure of the present invention; Figure 8 for Figure 7 The enlarged structural diagram at B in the middle; Figure 9 It is a cross-sectional view of the structure of the present invention; Figure 10 for Figure 9 The enlarged structural diagram at C in the middle; Figure 11 for Figure 9 The enlarged structural diagram at D in the middle; Figure 12 This is a control flow chart of the present invention.

[0016] Figure: 1. Support platform; 2. Environmental test chamber; 3. Guide plate; 4. Support plate; 5. Power supply socket; 6. Charging gun body; 7. Connecting pipe; 8. Pipeline; 9. Mobile rack; 10. Low-voltage, high-current power supply; 11. Switch module; 12. Temperature acquisition module; 13. Thermal imager; 14. Liquid storage tank; 15. Gear pump; 16. Finned heat sink; 17. Liquid supply control unit; 18. Mounting bracket; 19. Fixing pipe; 20. Temperature sensor; 22. Flow sensor; 23. Pressure sensor 24. Carbon dioxide fire extinguisher; 25. Central control computer; 26. Placement slot; 27. Electric push rod; 28. Positioning bearing; 29. ​​Mounting rod; 30. Moving port; 31. Auxiliary plate; 32. Threaded hole; 33. Sealing plate; 34. Bottom plate; 35. Slide groove; 36. Limiting groove; 37. Pulling groove; 38. Rotating rod; 39. Positioning clamp; 40. Sealing port; 41. Nozzle; 42. Positioning block; 43. Metal shrapnel; 44. Auxiliary rod; 45. Auxiliary wheel; 46. Pipe heater. DETAILED DESCRIPTION

[0017] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example 1: Please refer to Figures 1-12 The present invention provides a technical solution: a liquid-cooled charging gun temperature rise aging test device, the liquid-cooled charging gun temperature rise aging test device comprising: a support platform 1, an environmental test chamber 2 is provided on the surface of the support platform 1, a guide plate 3 is provided in the environmental test chamber 2, a support plate 4 is provided in the environmental test chamber 2, a power supply socket 5 is provided on the surface of the support plate 4, a charging gun body 6 is inserted into the power supply socket 5, a connecting pipe 7 is provided on the side of the charging gun body 6, a pipe 8 is provided in the connecting pipe 7, a carbon dioxide fire extinguisher 24 is provided on the outer surface of the environmental test chamber 2; a mobile frame 9 , a low-voltage, high-current power supply 10 and a switch module 11 are provided on the side of the mobile frame 9, a temperature acquisition module 12 is provided on the side of the environmental test chamber 2, and a thermal imager 13 is electrically connected to the temperature acquisition module 12; a liquid storage tank 14, a gear pump 15, a finned radiator 16 and a liquid supply control unit 17 are provided on the surface of the support platform 1, and a central control computer 25 is provided on the surface of the support platform 1; a mounting frame 18, a fixed tube 19 is provided on the surface of the mounting frame 18, and a temperature sensor 20, a flow sensor 22 and a pressure sensor 23 are provided on the surface of the fixed tube 19; During use, the gear pump 15 is used in conjunction with the liquid storage tank 14 to conveniently provide liquid coolant to the charging gun body 6. Then, by controlling the operation of the gear pump 15 and the pipe heater 46, liquid coolant with a specified flow rate and temperature is provided to the sample, and controlled by the liquid supply control unit 17. Once some parameters exceed the alarm requirements, the system immediately cuts off the switch module 11 to protect the sample from overheating and causing fire risks. A low-voltage, high-current power supply 10 is used in conjunction with the switch module 11 to provide test current for the charging gun body 6. The thermal imager 13 is used to continuously monitor the sample and all electrical connection points. Once the temperature of some positions exceeds the alarm requirements, the system immediately cuts off the switch module 11 to protect the sample from continuous heating and causing fire risks. When the sample fails thermally, the carbon dioxide fire extinguisher 24 can be triggered to extinguish the electrical fire in time.

[0019] Example 2: Based on Example 1, in order to facilitate testing in the environmental test chamber 2, a liquid supply control unit 17 and a central control computer 25 are provided. The mobile frame 9 is fixedly connected to the surface of the support platform 1. Two groups of pipes 8 are provided. One end of one group of pipes 8 is connected to the liquid storage tank 14, and one end of the other group of pipes 8 is connected to the fixed pipe 19. One end of the fixed pipe 19 is connected to the fin radiator 16 through an infusion pipe. A pipe heater 46 is provided in the fixed pipe 19. The input end of the gear pump 15 is connected to the liquid storage tank 14 using a water pipe, and the output end of the gear pump 15 is connected to the water inlet of the fin radiator 16 through a water pipe. The liquid supply control unit 17 is electrically connected to the temperature sensor 20, the flow sensor 22, the pressure sensor 23 and the gear pump 15. The control core of the liquid supply control unit 17 is PLC control + HMI touch screen and supports Modbus TCP communication and recipe storage function, the power supply socket 5 is electrically connected to the switch module 11 and the low-voltage high-current power supply 10, the temperature acquisition module 12 and the liquid supply control unit 17 are connected to the low-voltage high-current power supply 10, and the central control computer 25 is connected to the low-voltage high-current power supply 10, the temperature acquisition module 12, the gear pump 15, the carbon dioxide fire extinguisher 24 and the liquid supply control unit 17 via Bluetooth or WiFi; During use, the gear pump 15 can be used to send the coolant in the liquid storage tank 14 through the pipeline 8 into the charging gun body 6 for circulating cooling. The low-voltage and high-current power supply 10 is used in conjunction with the switch module 11 to provide the charging gun body 6 with test current. In addition, the thermal imager 13 cooperates with the temperature acquisition module 12 to continuously monitor the sample and all electrical connection points. Once the temperature of some locations exceeds the alarm requirement, the central control computer 25 immediately cuts off the switch module 11, and then starts the carbon dioxide fire extinguisher 24 to use the nozzle 41 to spray the gasified liquid carbon dioxide to extinguish the electrical fire equipment in time to improve safety. The liquid supply control unit 17 cooperates with the temperature sensor 20, the flow sensor 22 and the pressure sensor 23 to conveniently monitor the pressure, flow and temperature of the liquid supply unit. The pipeline heater 46 can conveniently adjust the temperature of the liquid supply, and the pipeline heater 46 is electrically connected to the liquid supply control unit 17.

[0020] Example 3: Based on Example 2, when a fire occurs in the environmental test chamber 2, a support plate 4 is provided, a placement groove 26 is provided on the surface of the support platform 1, an electric push rod 27 is provided in the placement groove 26, a positioning bearing 28 is provided at the telescopic end of the electric push rod 27, a mounting rod 29 is fixedly connected to the inner ring surface of the positioning bearing 28, a moving opening 30 is provided at the bottom of the environmental test chamber 2, and the end face of the moving opening 30 is a "T"-shaped plate structure, an auxiliary plate 31 is provided at the bottom of the support plate 4, a threaded hole 32 is provided on the side of the auxiliary plate 31, and one end of the mounting rod 29 is screwed into the threaded hole 32; In order to safely check the equipment in the post-fire environmental test chamber 2, the electric push rod 27 can be started to drive the installation rod 29 to move, thereby driving the auxiliary plate 31 to drive the support plate 4 to move. The slide groove 35 cooperates with the guide plate 3 to support the support plate 4 to facilitate and stably drive the support plate 4 to move. When the power supply socket 5 and the charging gun body 6 are pulled out after the fire, it is convenient for observation and there is no need for the staff to use tools to remove the power supply socket 5 and the charging gun body 6. In addition, the installation rod 29 is screwed into the threaded hole 32, which also facilitates the two to cooperate with the positioning bearing 28 for installation and disassembly.

[0021] In order to facilitate and safely drive the support plate 4 to move, a positioning card plate 39 is provided, a sealing plate 33 is provided on the side of the auxiliary plate 31, the sealing plate 33 is inserted into the moving port 30, the sealing plate 33 covers the top of the placement groove 26, the guide plate 3 is a "T"-shaped plate structure, the guide plate 3 is provided with two groups, the two groups of guide plates 3 are symmetrically distributed about the moving port 30, the sealing plate 33 is a "T"-shaped plate structure, the bottom of the support plate 4 is provided with a bottom plate 34, and a slide groove 35 is opened on the side of the bottom plate 34. The slide groove 35 is a "T"-shaped plate structure, the guide plate 3 is inserted into the slide groove 35, and the guide plate 3 is inserted into the slide groove 35. The guide plate 3 is slidably connected to the slide 35, a sealing opening 40 is opened on the side of the environmental test chamber 2, the connecting pipe 7 is inserted into the sealing opening 40, the mobile frame 9 is fixedly connected to the side of the connecting pipe 7, the mobile frame 9 covers the sealing opening 40, the nozzle 41 of the carbon dioxide fire extinguisher 24 is fixedly connected to the environmental test chamber 2, a limiting groove 36 is opened on the surface of the guide plate 3, and the limiting groove 36 has a right-angled triangular plate structure when viewed from the side. A traction groove 37 is opened at the bottom of the slide 35, and a rotating rod 38 is set on the side of the traction groove 37. A positioning card 39 is rotatably connected to the surface of the rotating rod 38; When in use, when the support plate 4 is displaced by the electric push rod 27, the bottom plate 34 can be displaced, so that the bottom plate 34 can slide on the guide plate 3 by utilizing the opening of the slide groove 35. When the bottom plate 34 slides to the appropriate position, one end of the positioning card plate 39 can be inserted into the limit groove 36, so that the positioning card plate 39 can be used to cooperate with the limit groove 36 to limit the support plate 4, thereby preventing the support plate 4 from moving excessively and causing the support plate 4 to separate from the guide plate 3. In addition, when the environmental test chamber 2 is frequently tested, the sealing plate 33 can be used to fill the movable port 30 on one hand, and the sealing plate 33 can be used to cover the placement groove 26 on the other hand, and the movable frame 9 can cover and fill the sealing port 40.

[0022] In order to facilitate the use of the positioning card plate 39, an auxiliary wheel 45 is provided. A positioning block 42 is provided on the end surface of the positioning card plate 39. A metal spring 43 is provided on the surface of the positioning block 42. One end of the metal spring 43 is fixedly connected to the surface of the positioning block 42, and the other end of the metal spring 43 is fixedly connected to the upper surface of the traction groove 37. A groove is formed on the end surface of the positioning card plate 39. An auxiliary rod 44 is provided on the side of the groove. The auxiliary wheel 45 is rotatably connected to the surface of the auxiliary rod 44. When the support plate 4 needs to be reset during use, the positioning card plate 39 can be rotated around the rotating rod 38, and then the positioning card plate 39 can be moved backward in the limit groove 36, so that the support plate 4 can be easily reset. The auxiliary wheel 45 cooperates with the rotation of the auxiliary rod 44 to facilitate the displacement of the positioning card plate 39 along the guide plate 3. The elastic force of the metal spring 43 can increase the stability of the positioning card plate 39 inserted into the limit groove 36 when one end of the positioning card plate 39 is inserted into the limit groove 36.

[0023] In actual use, the gear pump 15 is used in conjunction with the liquid storage tank 14 to conveniently provide liquid coolant to the charging gun body 6, and then by controlling the operation of the gear pump 15 and the pipe heater 46, liquid coolant with a specified flow rate and temperature is provided to the sample, and controlled by the liquid supply control unit 17. Once some parameters exceed the alarm requirements, the system immediately cuts off the switch module 11 to protect the sample from overheating and causing fire risks. A low-voltage, high-current power supply 10 is used in conjunction with the switch module 11 to provide test current for the charging gun body 6. The thermal imager 13 is used to continuously monitor the sample and all electrical connection points. Once the temperature of some positions exceeds the alarm requirements, the system immediately cuts off the switch module 11 to protect the sample from continuous heating and causing fire risks. When the sample fails thermally, the carbon dioxide fire extinguisher 24 can be triggered to use the nozzle 41 to spray the gasified liquid carbon dioxide to extinguish the electrical fire equipment in time to improve safety.

[0024] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Liquid-cooled charging gun temperature rise aging test device, characterized by: The liquid-cooled charging gun temperature rise aging test device comprises: a support platform (1), an environmental test box (2) is provided on the surface of the support platform (1), a guide plate (3) is provided in the environmental test box (2), a support plate (4) is provided in the environmental test box (2), a power supply socket (5) is provided on the surface of the support plate (4), a charging gun body (6) is inserted into the power supply socket (5), a connecting pipe (7) is provided on the side of the charging gun body (6), a pipe (8) is provided in the connecting pipe (7), and a carbon dioxide fire extinguisher (24) is provided on the outer surface of the environmental test box (2); A mobile frame (9), a low-voltage, high-current power supply (10) and a switch module (11) are provided on the side of the mobile frame (9), a temperature acquisition module (12) is provided on the side of the environmental test chamber (2), and a thermal imager (13) is electrically connected to the temperature acquisition module (12); The surface of the support platform (1) is provided with a liquid storage tank (14), a gear pump (15), a finned radiator (16) and a liquid supply control unit (17), and the surface of the support platform (1) is provided with a central control computer (25); A mounting frame (18) is provided on the surface of the mounting frame (18), and a fixed tube (19) is provided on the surface of the fixed tube (19). A temperature sensor (20), a flow sensor (22), and a pressure sensor (23) are provided on the surface of the fixed tube (19).

2. The liquid-cooled charging gun temperature rise aging test device according to claim 1, characterized in that: The movable frame (9) is fixedly connected to the surface of the support platform (1), and two groups of pipes (8) are provided. One end of one group of pipes (8) is connected to the liquid storage tank (14), and one end of the other group of pipes (8) is connected to the fixed pipe (19). One end of the fixed pipe (19) is connected to the fin radiator (16) through a liquid infusion pipe, and a pipe heater (46) is provided in the fixed pipe (19).

3. The liquid-cooled charging gun temperature rise aging test device according to claim 1, characterized in that: The input end of the gear pump (15) is connected to the liquid storage tank (14) via a water pipe, and the output end of the gear pump (15) is connected to the water inlet of the finned radiator (16) via a water pipe. The liquid supply control unit (17) is electrically connected to the temperature sensor (20), the flow sensor (22), the pressure sensor (23) and the gear pump (15). The control core of the liquid supply control unit (17) is a PLC control + HMI touch screen and supports Modbus TCP communication and recipe storage functions.

4. The liquid-cooled charging gun temperature rise aging test device according to claim 1, characterized in that: The power supply socket (5) is electrically connected to the switch module (11) and the low-voltage, high-current power supply (10), the temperature acquisition module (12) and the liquid supply control unit (17) are electrically connected to the low-voltage, high-current power supply (10), and the central control computer (25) is electrically connected to the low-voltage, high-current power supply (10), the temperature acquisition module (12), the gear pump (15), the carbon dioxide fire extinguisher (24) and the liquid supply control unit (17) via Bluetooth or WiFi.

5. The liquid-cooled charging gun temperature rise aging test device according to claim 1, characterized in that: The support platform (1) has a placement groove (26) on its surface, an electric push rod (27) is provided in the placement groove (26), a positioning bearing (28) is provided at the telescopic end of the electric push rod (27), and a mounting rod (29) is fixedly connected to the inner ring surface of the positioning bearing (28).

6. The liquid-cooled charging gun temperature rise aging test device according to claim 1, characterized in that: The bottom of the environmental test box (2) is provided with a movable opening (30), the end face of which is a "T"-shaped plate structure. An auxiliary plate (31) is provided at the bottom of the support plate (4), and a threaded hole (32) is provided on the side of the auxiliary plate (31). One end of the mounting rod (29) is screwed into the threaded hole (32).

7. The liquid-cooled charging gun temperature rise aging test device according to claim 6, characterized in that: A sealing plate (33) is provided on the side of the auxiliary plate (31), and the sealing plate (33) is inserted into the movable opening (30). The sealing plate (33) covers the upper portion of the placement groove (26). The guide plate (3) is in a "T"-shaped plate structure. Two groups of guide plates (3) are provided. The two groups of guide plates (3) are symmetrically distributed about the movable opening (30). The sealing plate (33) is in a "T"-shaped plate structure.

8. The liquid-cooled charging gun temperature rise aging test device according to claim 1, characterized in that: The support plate (4) is provided with a bottom plate (34) at the bottom, a slide groove (35) is provided on the side of the bottom plate (34), and the slide groove (35) is a "T"-shaped plate structure. The guide plate (3) is inserted into the slide groove (35), and the guide plate (3) is slidably connected to the slide groove (35). A sealing opening (40) is provided on the side of the environmental test chamber (2), and the connecting pipe (7) is inserted into the sealing opening (40). The movable frame (9) is fixedly connected to the side of the connecting pipe (7), and the movable frame (9) covers the sealing opening (40). The nozzle (41) of the carbon dioxide fire extinguisher (24) is fixedly connected in the environmental test chamber (2).

9. The liquid-cooled charging gun temperature rise aging test device according to claim 1, characterized in that: The guide plate (3) has a limiting groove (36) on its surface. The limiting groove (36) has a right-angled triangular plate structure when viewed from the side. A traction groove (37) is provided at the bottom of the slide groove (35). A rotating rod (38) is provided on the side of the traction groove (37). A positioning clamping plate (39) is rotatably connected to the surface of the rotating rod (38).

10. The liquid-cooled charging gun temperature rise aging test device according to claim 9, characterized in that: The end surface of the positioning card plate (39) is provided with a positioning block (42), and a metal spring (43) is provided on the surface of the positioning block (42). One end of the metal spring (43) is fixedly connected to the surface of the positioning block (42), and the other end of the metal spring (43) is fixedly connected to the upper surface of the traction groove (37). The end surface of the positioning card plate (39) is provided with a groove, and an auxiliary rod (44) is provided on the side surface of the groove. The surface of the auxiliary rod (44) is rotatably connected to an auxiliary wheel (45).

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