Indoor charging pile with fire-fighting device for new energy automobile

Abstract

The invention discloses an indoor charging pile with a fire-fighting device for a new energy automobile, and relates to the technical field of charging piles, the indoor charging pile comprises a shell, a charging gun, a circuit breaker, a cable, a gas tank, a conductive part, an insulating seat and an insulating medium release mechanism, and the indoor charging pile is used for driving a cable core of the cable to move downwards after carbon dioxide gas in the gas tank is released. The insulating medium is released to the accommodating cavity, so that the insulating medium wraps the surface of a cable core of the cable; and a clamping mechanism. According to the invention, the insulating medium release mechanism acts, so that the insulating medium is released to the accommodating cavity and further wraps the cable core of the cable, so that the cable core is not electrically communicated with the electric appliance element, current is prevented from entering a charged automobile, potential safety hazards are avoided, high-pressure carbon dioxide gas is released from the gas tank, and the charging efficiency is improved. The oxygen concentration in the shell is rapidly reduced, fire protection hidden dangers are reduced, the insulating medium release mechanism can be triggered to act through release of the carbon dioxide gas, and insulation processing can be conducted on the cable core of the cable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging piles, in particular to an indoor charging pile for new energy vehicles with a fire-fighting device. BACKGROUND

[0002] A charging pile, also known as an electric vehicle charging station or an electric vehicle power supply device, is a device that provides electric energy to an electric vehicle, enabling the electric vehicle to store enough electric energy to support its operation.

[0003] Currently, mainstream low-power household wall-mounted charging piles usually rely on metal shells (usually aluminum alloys) for heat dissipation. If excessive current is generated during charging of the power module inside the charging pile, heat will quickly accumulate, thereby causing a fire hazard inside the charging pile. According to the search, a patent with the publication number CN117656903A discloses an automobile charging pile with a fire-fighting structure, which includes a base, a charging pile shell is provided on the top of the base, a ventilation opening is formed in the lower part of the charging pile shell to communicate the inside and outside of the charging pile shell; a control panel is provided on the upper part of the charging pile shell, a charging assembly is provided inside the charging pile, and the control panel is electrically connected to the charging assembly.

[0004] In the above-mentioned prior art, although carbon dioxide gas is introduced into the shell of the charging pile to reduce the oxygen content and reduce the fire hazard, the electrical components of the PCB inside the charging pile may produce a leakage phenomenon. If the cable of the charging gun is still electrically connected to the PCB, a large safety hazard may occur when the current passes through the cable of the charging gun into the new energy vehicle being charged. SUMMARY

[0005] The purpose of the present application is to provide an indoor charging pile for new energy vehicles with a fire-fighting device to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: an indoor charging pile for new energy vehicles with a fire-fighting device, comprising a shell of a charging pile and a charging gun, a circuit breaker is installed in the shell, the charging gun is connected to the circuit breaker through a cable, and further comprising: a gas tank installed in the shell and storing high-pressure carbon dioxide gas inside; a conductive part electrically connected to the electrode column of the circuit breaker, the conductive part is provided with a core hole for the core of the cable to pass freely; an insulating seat fixed to the conductive part, and the lower end surface of the insulating seat is provided with a receiving cavity; The insulation medium releasing mechanism is arranged in the accommodating cavity and is used to drive the cable core to move downward and release the insulation medium into the accommodating cavity after the carbon dioxide gas in the gas tank is released, so that the insulation medium wraps the surface of the cable core; The clamping mechanism is arranged in the accommodating cavity and is triggered by the insulation medium releasing mechanism to act in a natural state, so that the clamping mechanism clamps the cable core.

[0007] According to the technical scheme, the insulation medium releasing mechanism is actuated to release the insulation medium into the accommodating cavity, and then the insulation medium wraps the cable core, so that the cable core does not form electrical communication with the electrical element, thereby avoiding the current from flowing into the vehicle being charged, and avoiding the safety hazard. The high-pressure carbon dioxide gas is released from the gas tank, so that the oxygen concentration in the shell rapidly decreases, reducing the fire-fighting hidden danger. In addition, the release of the carbon dioxide gas can trigger the actuation of the insulation medium releasing mechanism, thereby achieving the insulation treatment of the cable core when the fire-fighting treatment is performed.

[0008] Further, the gas outlet of the gas tank is provided with an intelligent valve.

[0009] According to the technical scheme, when the temperature in the shell rises or smoke is generated, the signal is collected by the external sensor and then fed back to the external control module. The control module controls the actuation of the intelligent valve, so that the gas outlet of the gas pipe is quickly opened, and the carbon dioxide gas in the gas tank is rapidly released.

[0010] Further, the insulation medium releasing mechanism includes a liquid storage bag arranged in the accommodating cavity, the liquid storage bag has an annular outer contour and stores microcrystalline wax inside, the insulation seat is provided with a sliding cavity, and the sliding cavity coaxially slides and is clamped with a sliding block. The sliding block is vertically fixed with a plurality of puncture parts, the puncture parts slide through the insulation seat and correspond to the liquid storage bag, the sliding block is fixed with a push rod, the push rod corresponds to the core penetrating hole, and the outer diameter of the push rod is smaller than the hole diameter of the core penetrating hole.

[0011] According to the technical scheme, the sliding block moves towards the accommodating cavity, so that the puncture part pierces the liquid storage bag, and then the liquid storage bag is broken, so that the microcrystalline wax stored inside rapidly flows out and fills the accommodating cavity and adheres to the surface of the cable core.

[0012] Further, the clamping mechanism includes an expansion shaft coaxially fixed to the insulation seat, the expansion shaft coaxially has a clamping hole through which the cable core freely passes, the expansion shaft is provided with a plurality of deformation seams penetrating the clamping hole around the circumference, and when the liquid storage bag expands, the inner ring of the liquid storage bag extrudes the expansion shaft, so that the expansion shaft elastically contracts to clamp the cable core in the clamping hole.

[0013] Through the technical scheme, when the liquid storage bag expands, the ring hole will extrude the expansion shaft, so that the expansion shaft is elastically deformed, so that the expansion shaft can clamp the cable core, and when the liquid storage bag is punctured by the puncture part, the extrusion force of the liquid storage bag on the expansion shaft disappears, so that the clamping force of the expansion shaft on the cable core disappears, at this time the push rod can smoothly push the cable core downward, so that the cable core can move downward, and then the cable core is out of the electrical contact state with the conductive part.

[0014] Further, the lower surface of the conductive part is fixedly connected with a fixed part, the fixed part is provided with a through hole for the cable to pass freely, and the fixed part is provided with an immersion cavity.

[0015] Through the technical scheme, when the push rod pushes the cable core downward, the cable core enters the immersion cavity of the fixed part, the insulating medium is gathered in the immersion cavity, so that the cable core can be immersed in the insulating medium in the immersion cavity, and then the cable core has good insulation protection effect.

[0016] Further, the upper side of the sliding cavity is fixedly connected with an end cover, a first elastic member is arranged between the end cover and the sliding block, and the first elastic member gives the sliding block potential energy for moving downward.

[0017] Through the technical scheme, the elastic potential energy of the first elastic member is released, so that the sliding block can be driven to move downward, and then the push rod can push the cable core to move downward.

[0018] Further, the wall surface of the insulating seat is fixedly connected with a mounting part, the mounting part is provided with a communication cavity, a movable block is slidingly connected in the communication cavity, a stop pin is coaxially fixedly connected to the end surface of the movable block, the stop pin slidingly penetrates into the insulating seat, and an annular stop groove is formed in the periphery of the sliding block for the end part of the stop pin to engage.

[0019] Through the technical scheme, the elastic potential energy of the first elastic member can be released by the stop pin being separated from the engagement state of the annular stop groove, and then the sliding block is driven to move downward, and when the stop pin is engaged in the annular stop groove, the sliding block will compress the first elastic member, and the sliding block is in a relatively static state with the insulating seat in the insulating seat.

[0020] Further, a second elastic member is installed in the communication cavity, and the second elastic member gives the movable block potential energy for moving in the direction of the insulating seat.

[0021] Through the technical scheme, the second elastic member generates an elastic resisting force on the movable block, so that in a natural state, the movable block drives the stop pin to move in the direction of the insulating seat, and then the stop pin can be engaged in the annular stop groove of the sliding block to limit and stop the sliding block.

[0022] Further, the installation part is sleeved with an air bag, one end of the movable block is in the shape of a truncated cone and forms an air inlet cavity with the inner wall of the communication cavity, and the air bag is communicated with the air inlet cavity through the air pipe.

[0023] Through the above technical scheme, in the initial state, the elastic resistance of the second elastic member to the movable block is greater than the air pressure of the air in the air bag, so that the movable block can drive the stop pin to move towards the insulating base, and when the carbon dioxide gas in the gas tank is rapidly released, the air pressure in the shell rapidly increases, thereby generating a pressing force on the air bag, so that the air in the air bag can enter the air inlet cavity through the air pipe, thereby increasing the air pressure of the air in the air bag on the movable block, so that the movable block can move away from the insulating base by overcoming the elastic resistance of the second elastic member, so that the stop pin can be disengaged from the engagement state with the annular stop groove.

[0024] Further, the insulating base is embedded with a dynamic sealing ring, and the dynamic sealing ring is sleeved on the periphery of the stop pin.

[0025] Through the above technical scheme, the contact surface of the stop pin and the insulating base has a sealing effect due to the setting of the dynamic sealing ring.

[0026] Compared with the prior art, the beneficial effects of the present application are: 1、In the present application, the insulating medium release mechanism is actuated to release the insulating medium into the accommodating cavity, thereby wrapping the cable core, so that the cable core does not come into electrical communication with the electrical components, thereby avoiding the risk of current flowing into the car being charged, and avoiding the safety hazard, and the high-pressure carbon dioxide gas released from the gas tank makes the oxygen concentration in the shell decrease rapidly, reducing the fire hazard, and the release of carbon dioxide gas triggers the actuation of the insulating medium release mechanism, thereby achieving the insulation treatment of the cable core when the fire-fighting treatment is carried out; 2、In the present application, when the liquid storage bag expands, the annular hole will extrude the expansion shaft, so that the expansion shaft is elastically deformed, so that the expansion shaft can clamp the cable core, and when the liquid storage bag is pierced by the piercing part, the extrusion force of the liquid storage bag on the expansion shaft disappears, so that the clamping force of the expansion shaft on the cable core disappears, at this time the push rod can smoothly push the cable core downward, so that the cable core can move downward, thereby making the cable core disengaged from the electrical contact state with the conductive part; 3、The initial state, the second elastic piece of the application, the elastic resistance of the movable block is greater than the air pressure of the air in the air bag, and then the movable block can drive the stop pin to move towards the direction of the insulating seat, and when the carbon dioxide gas in the air tank is rapidly released, the air pressure in the shell rapidly increases, and then the air bag can be extruded, so that the air in the air bag can enter the air inlet cavity through the air pipe, and then the air pressure of the air in the air bag acting on the movable block increases, so that the movable block overcomes the elastic resistance of the second elastic piece, and then can move away from the direction of the insulating seat, so that the stop pin can be separated from the engagement state with the annular stop groove. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The overall structure of the indoor charging pile with fire-fighting device for new energy vehicle in the application is shown in the figure. Figure 2 The position relationship of the part structure in the application is shown in the figure. Figure 1 The position relationship of the part structure in the application is shown in the figure. Figure 3 The position relationship of the part structure in the application is shown in the figure. Figure 4 The structure of the application is shown in the figure. Figure 3 The structure of the application is shown in the figure. Figure 5 The position relationship of the part structure in the application is shown in the figure. Figure 3 The position relationship of the part structure in the application is shown in the figure. Figure 6 The position relationship of the part structure in the application is shown in the figure. Figure 5 The position relationship of the part structure in the application is shown in the figure. Figure 7 The position relationship of the part structure in the application is shown in the figure. Figure 3 The position relationship of the part structure in the application is shown in the figure. Figure 8 The structure of the application is shown in the figure.

[0028] In the figure, the reference signs are as follows: 1, cabinet door; 2, shell; 3, cable; 4, charging gun; 5, intelligent valve; 6, air tank; 7, outer skin; 8, conductive part; 9, circuit breaker; 10, insulating seat; 11, end cover; 12, air pipe; 13, air bag; 14, mounting part; 15, fixed part; 16, first elastic piece; 17, sliding block; 18, annular stop groove; 19, puncture part; 20, push rod; 21, expansion shaft; 22, threaded groove; 23, second elastic piece; 24, liquid storage bag; 25, stop pin; 26, movable block; 27, core hole; 28, clamping hole; 29, deformation seam. DETAILED DESCRIPTION

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1-8 This invention provides a technical solution: an indoor charging pile for new energy vehicles with a fire-fighting device, comprising a charging pile housing 2 and a charging gun 4. The housing 2 is fitted with a cabinet door 1 to seal the interior. Inside the housing 2 is a PCB board and a circuit breaker 9. Conductive parts 8 are installed on the electrode posts of the circuit breaker 9 and are electrically connected to the motor posts of the circuit breaker 9. A cable 3 is installed on the charging gun 4, with the cable core passing through the conductive part 8. The conductive part 8 has a through-hole 27 for the cable core to pass freely, allowing the cable 3 to connect to the circuit breaker 9. The power lines of the PCB board are connected to the circuit breaker. Circuit breaker 9 is electrically connected, allowing the current on the PCB board to flow through circuit breaker 9 into charging gun 4. Gas tank 6 is installed inside the housing 2, and high-pressure carbon dioxide gas is stored inside the gas tank 6. A smart valve 5 is installed at the outlet of the gas tank 6. The smart valve 5 is electrically connected to a control module (such as a microcontroller) set inside the housing 2. A sensor is installed inside the housing 2 to detect whether there is smoke or high temperature inside the housing 2. A fixing part 15 is fixedly attached to the lower surface of the conductive part 8. A through hole is opened on the lower surface of the fixing part 15 to allow the outer sheath 7 of the cable core of the cable 3 to pass freely. In addition, an immersion chamber is opened inside the fixing part 15. The upper surface of the conductive part 8 has a blind hole-type threaded groove 22. An insulating seat 10 is threaded into the threaded groove 22. The lower end face of the insulating seat 10 has a receiving cavity. An expansion shaft 21 is connected to the receiving cavity by screws. In its natural state, the outer diameter of the expansion shaft 21 increases sequentially from top to bottom. The expansion shaft 21 has a clamping hole 28 coaxially formed to allow the cable core of the cable 3 to pass freely. Multiple expansion slots 29 that pass through the clamping holes 28 are formed around the periphery of the expansion shaft 21. In addition, a liquid storage bladder 24 is installed in the receiving cavity. The liquid storage bladder 24 is filled with microcrystalline wax, which is fluid and has good heat resistance and insulation properties. After the liquid storage bladder 24 expands, its outer contour is annular and it is fitted onto the expansion shaft 21. The annular hole of the liquid storage bladder 24 will exert a compressive force on the expansion shaft 21, thereby causing the expansion shaft 21 to undergo elastic contraction deformation. When the expansion shaft 21 undergoes elastic contraction deformation, the clamping hole 28 of the expansion shaft 21 can clamp the cable core of the cable 3 so that the cable core can be stably electrically connected to the conductive part 8. In addition, the top of the insulating base 10 is provided with a sliding cavity, a sliding block 17 is coaxially and slidingly fitted in the sliding cavity, a plurality of puncture parts 19 are vertically and fixedly connected to the downward face of the sliding block 17, the puncture parts 19 are slidingly arranged in the insulating base 10 and correspond to the liquid storage bag 24, the sliding block 17 is fixedly connected with a push rod 20, the push rod 20 corresponds to the core penetrating hole 27, the outer diameter of the push rod 20 is smaller than the diameter of the core penetrating hole 27, an end cover 11 is fixedly connected to the upper side of the sliding cavity, a first elastic member 16 is arranged between the end cover 11 and the sliding block 17, the first elastic member 16 provides the sliding block 17 with potential energy for moving downward, the wall of the insulating base 10 is fixedly connected with a mounting part 14, the mounting part 14 is provided with a communication cavity, a movable block 26 is slidingly fitted in the communication cavity, a stop pin 25 is coaxially and fixedly connected to the end face of the movable block 26, the stop pin 25 is slidingly arranged in the insulating base 10, the periphery of the sliding block 17 is provided with an annular stop groove 18 for the end part of the stop pin 25 to be fitted, in addition, a second elastic member 23 is arranged in the communication cavity, the second elastic member 23 provides the movable block 26 with potential energy for moving towards the insulating base 10, when the sliding block 17 moves upward, the second elastic member 23 will be compressed, so that the second elastic member 23 accumulates elastic potential energy, when the elastic potential energy of the second elastic member 23 is released, a driving force will be generated to the sliding block 17, so that the sliding block 17 moves downward quickly, and the puncture parts 19 puncture the liquid storage bag 24, so that the surface of the liquid storage bag 24 is punctured, the mounting part 14 is sleeved with an air bag 13, the end of the movable block 26 towards the insulating base 10 is in the shape of a circular truncated cone, and forms an air inlet cavity with the inner wall of the communication cavity, the air bag 13 is connected with the air inlet cavity through the air pipe 12, a dynamic sealing ring (not shown in the figure) is embedded in the insulating base 10, and the dynamic sealing ring is sleeved on the periphery of the stop pin 25.

[0031] The working principle of the present application is as follows: When smoke or large heat is generated in the shell 2, the sensor will collect the signal and feed back to the control module, the intelligent valve 5 is started by the control module, so that the gas outlet of the gas tank 6 is opened, the carbon dioxide gas in the gas tank 6 is quickly released from the gas outlet, so that the air pressure in the shell 2 is increased, and the oxygen concentration in the shell 2 is reduced, so as to avoid the generation of open flame, in addition, after the air pressure in the shell 2 is increased, the air bag 13 will be extruded, so that the air in the air bag 13 is extruded to the air inlet cavity through the air pipe 12, so that the air pressure acting on the movable block 26 is increased, and the movable block 26 overcomes the elastic resistance of the second elastic member 23, so that the movable block 26 drives the stop pin 25 to move away from the insulating base 10, so that the stop pin 25 is separated from the annular stop groove 18 of the sliding block 17, at this time, the elastic potential energy of the first elastic member 16 is released, and drives the sliding block 17 to move downward, when the sliding block 17 moves downward, the puncture parts 19 move downward synchronously, so that the puncture parts 19 puncture the liquid storage bag 24, so that the liquid storage bag 24 is broken, and then the microcrystalline wax in the liquid storage bag 24 is released; When the microcrystalline wax in the liquid storage bag 24 is released, the extrusion force of the liquid storage bag 24 on the expansion shaft 21 disappears, and the expansion shaft 21 will be elastically expanded and deformed, that is, the expansion shaft 21 will restore to the state that the outer diameter increases from top to bottom, and then the clamping state of the expansion shaft 21 on the cable core disappears. When the sliding block 17 moves downward, the push rod 20 will smoothly push the cable core end downward, and the cable core will move downward, and then the end of the cable core is extruded into the soaking cavity of the fixed part 15 by the push rod 20. At this time, the microcrystalline wax in the liquid storage bag 24 will enter the soaking cavity through the gap between the periphery of the push rod 20 and the hole wall of the core hole 27, so that the surface of the cable core is attached with the microcrystalline wax. Due to the good insulation effect of the microcrystalline wax, the exposed metal part of the cable core will not contact other electrical elements in the charging pile, thereby avoiding the risk of electric shock, so as to prevent the electric current in the charging pile from entering the car being charged through the charging gun 4, thereby reducing the safety hazard.

[0032] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, alternatives, and variations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An indoor charging pile with a fire-fighting device for a new energy vehicle, comprising a charging pile shell (2) and a charging gun (4), a circuit breaker (9) is installed in the charging pile shell (2), and the charging gun (4) is connected with the circuit breaker (9) through a cable (3), characterized in that, Also include: Gas tank (6), installed in the shell (2), and internal storage of high pressure carbon dioxide gas; Conductive part (8), electrically connected to the electrode column of the circuit breaker (9), the conductive part (8) is provided with a cable core (27) for the cable (3) to pass through freely; Insulating seat (10), fixed to the conductive part (8), the lower end surface of the insulating seat (10) is provided with a receiving cavity; Insulating medium release mechanism, provided in the receiving cavity, for driving the cable core of the cable (3) to move downward after the carbon dioxide gas in the gas tank (6) is released, and releasing the insulating medium to the receiving cavity, so that the insulating medium wraps the surface of the cable core of the cable (3); Clamping mechanism, provided in the receiving cavity, and in the natural state, the clamping mechanism is triggered by the insulating medium release mechanism to act, so that the clamping mechanism clamps the cable core of the cable (3).

2. The indoor charging pile with a fire extinguishing device for a new energy vehicle according to claim 1, characterized in that, The gas outlet of the gas tank (6) is provided with an intelligent valve (5).

3. The indoor charging pile with a fire-fighting device for a new energy vehicle according to claim 1, characterized in that, The insulating medium release mechanism includes a liquid storage bag (24) installed in the receiving cavity, the outer contour of the liquid storage bag (24) is annular and the inside of the liquid storage bag (24) stores microcrystalline wax, the insulating seat (10) is provided with a sliding cavity, and the sliding cavity is coaxially slidingly fitted with a sliding block (17); The sliding block (17) is vertically fixed with a plurality of puncture parts (19), the puncture parts (19) are slidingly provided in the insulating seat (10) and correspond to the liquid storage bag (24), the sliding block (17) is fixed with a push rod (20), the push rod (20) corresponds to the core hole (27), and the outer diameter of the push rod (20) is smaller than the hole diameter of the core hole (27).

4. The indoor charging pile with a fire-fighting device for a new energy vehicle according to claim 3, characterized in that, The clamping mechanism includes an expansion shaft (21) coaxially fixed to the insulating seat (10), the expansion shaft (21) is coaxially provided with a clamping hole (28) for the cable core of the cable (3) to pass through freely, and the periphery of the expansion shaft (21) is provided with a plurality of deformation seams (29) penetrating the clamping hole (28), when the liquid storage bag (24) expands, the inner ring of the liquid storage bag (24) extrudes the expansion shaft (21), so that the expansion shaft (21) elastically contracts, so that the clamping hole (28) clamps the cable core of the cable (3).

5. The indoor charging pile with a fire-fighting device for a new energy vehicle according to claim 3, characterized in that, The lower surface of the conductive part (8) is fixed with a fixed part (15), the fixed part (15) is provided with a through hole for the cable (3) to pass through freely, and the fixed part (15) is provided with a soaking cavity.

6. The indoor charging pile with a fire-fighting device for a new energy vehicle according to claim 3, characterized in that, The upper side of the sliding cavity is fixed with an end cover (11), a first elastic member (16) is arranged between the end cover (11) and the sliding block (17), and the first elastic member (16) gives the sliding block (17) potential energy to move downward.

7. The indoor charging pile with a fire-fighting device for a new energy vehicle according to claim 3, characterized in that, The wall surface of the insulating seat (10) is fixed with a mounting part (14), the mounting part (14) is provided with a communication cavity, the communication cavity is slidingly fitted with a movable block (26), the end surface of the movable block (26) is coaxially fixed with a stop pin (25), the stop pin (25) slidingly penetrates the insulating seat (10), and the periphery of the sliding block (17) is provided with an annular stop groove (18) for the end of the stop pin (25) to engage.

8. The indoor charging pile with a fire-fighting device for a new energy vehicle according to claim 7, characterized in that, The second elastic member (23) is installed in the communication cavity, and the second elastic member (23) gives the potential energy of the movable block (26) moving towards the insulating base (10).

9. The indoor charging pile with a fire-fighting device for a new energy vehicle according to claim 7, characterized in that, The installation part (14) is peripherally sleeved with an air bag (13), one end of the movable block (26) towards the insulating base (10) is in the shape of a circular truncated cone, and forms an air inlet cavity with the inner wall of the communication cavity, and the air bag (13) is penetrated with the air inlet cavity through the air pipe (12).

10. The indoor charging pile with a fire-fighting device for a new energy vehicle according to claim 7, characterized in that, The dynamic sealing ring is embedded in the insulating base (10), and the dynamic sealing ring is sleeved on the periphery of the stop pin (25).

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