A distribution box with insulation function

Abstract

The application relates to the technical field of distribution boxes, and discloses a distribution box with an insulation function, which comprises a box body, a driving device is fixedly connected to the outer surface of the box body, a bidirectional screw rod is in transmission connection with the inner surface of the driving device, a push block is movably connected to the outer surface of the bidirectional screw rod, an inductor is fixedly connected to the back inner wall of the box body, and slide rails are fixedly connected to the two sides of the inner wall of the box body. The distribution box is sealed by combining the insulation plate I and the insulation plate II and blocking the heat dissipation grooves, dust in the box body is prevented from being adsorbed with electric charges and then flying to the outside of the box body, dust adsorbed with electric charges is prevented from easily generating static electricity, and safety hazards are prevented from being caused by the existence of flammable and explosive articles around. The slide shaft is popped up and inserted into the through hole to limit the clamping plate, the insulation plate I and the insulation plate II are more stably attached, the sealing property is improved, and the anti-creeping effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of distribution box, in particular to a distribution box with insulation function. BACKGROUND

[0002] The distribution box is a device responsible for completing power control, protection, conversion and distribution at the end of urban rail transit power supply system, mainly composed of wires, components (including disconnectors, circuit breakers, etc.) and box body, etc. When in normal operation, it can be connected or disconnected by manual or automatic switch. Since the structure of traction power control system is relatively complex, it has high requirements on temperature, humidity and corrosion resistance, and a high-stability, high-reliability and reasonable-structure distribution box is needed. Once the electrical components in the distribution box leak, it will be dangerous. In order to prevent the electrical components from leaking, the existing device adopts an insulation structure to block the current in the distribution box. In order to ensure the insulation without dead angle, a fully enclosed distribution box is used. However, this insulation and leakage prevention method cannot dissipate the heat generated by the electrical components in normal use, and is more likely to cause overheating, short circuit or leakage of the electrical components. Once the leakage occurs, the charge in the distribution box cannot be released, which may cause the risk of burning or explosion of the components.

[0003] The patent No. CN201821428667.1 discloses an insulated distribution box. The electrical components of the patent are installed on the mounting plate. Since the mounting plate is made of wood material, there is no need to worry about the electric connection between the lines. The electrical lines are installed in the line protection sleeve. The main channel and branch channel provided on the line protection sleeve make the electrical lines more organized and orderly. After the installation of the electrical components is completed, the upper cover of the distribution box is covered on the distribution box body. After the fastener is fixed, the screw is tightened. When maintenance is needed, the distribution box door is opened by opening the hand grip, and the internal lines are maintained and treated. The structure is simple, convenient and practical, the internal connection lines can be organized in an orderly manner, the insulation is strong, the human body will not be caused by electric shock, and the waterproof performance is good. Although the above problems are solved, the patent still adopts a fully enclosed insulation method, which cannot be insulated according to the leakage of the electrical components, so that the heat of the electrical components is difficult to dissipate from the distribution box in use, which is more likely to cause overheating, short circuit and leakage of the electrical components. Therefore, it is necessary to design a distribution box with insulation function which can take insulation measures according to the leakage of the electrical components without affecting the heat dissipation of the distribution box in normal use. SUMMARY

[0004] The present application relates to the technical field of distribution box, in particular to a distribution box with insulation function.

[0005] In order to solve the above technical problems, the present application provides the following technical solutions: a power distribution box with insulation function, comprising a box body, the outer surface of the box body is fixedly connected with a driving device, the inner surface of the driving device is drivingly connected with a bidirectional screw rod, the outer surface of the bidirectional screw rod is movably connected with a push block, the inner wall rear side of the box body is fixedly connected with an inductor, the inner wall two sides of the box body are fixedly connected with a slide rail, the inner surface of the slide rail is slidingly connected with an insulation plate one and an insulation plate two, the bottom surface of the insulation plate one and the insulation plate two is fixedly connected with a protruding block, the rear side of the insulation plate one is fixedly connected with a clamping plate, the inner surface of the insulation plate two is slidingly connected with a slide shaft, the bottom of the box body is provided with a drying device for absorbing moisture to avoid leakage of moisture and conductive current to cause current diffusion in the box body, the rear side of the box body is provided with a conductive device for quickly conducting the current to the ground to dissipate after the electrical element leaks, the bidirectional screw rod is rotatably connected with the inner wall front side of the box body, the two sides of the box body are provided with heat dissipation grooves, the slide shaft and the insulation plate two are provided with a spring, the inner side of the clamping plate is provided with a through hole, when the inductor senses the leakage of the electrical element in the box body, an electrical signal is sent to the driving device, the driving device is started after receiving the signal, and drives the bidirectional screw rod to rotate, the bidirectional screw rod drives the two push blocks to approach each other when rotating, the two push blocks push the two protruding blocks to approach, the two protruding blocks drive the insulation plate one and the insulation plate two to combine, the clamping plate on the insulation plate one is inserted into the interior of the insulation plate two when the insulation plate one and the insulation plate two combine, and the clamping plate pushes the slide shaft to slide downward, when the through hole on the clamping plate is aligned with the slide shaft, the spring below the slide shaft makes the slide shaft pop up and insert into the through hole to limit the clamping plate, the insulation plate one and the insulation plate two are separated, and the heat generated by the electrical element when working again can be dissipated from the heat dissipation grooves.

[0006] According to the technical scheme, the drying device comprises a limiting frame, a drying box and a net plate, the limiting frame is fixedly connected to the bottom of the box body, the drying box is arranged in the limiting frame, the net plate is hingedly connected to the side of the drying box, the drying device further comprises a connecting rod, a clamping jaw, a push plate and a limiting lug, the connecting rod is fixedly connected to the inner surface of the push block, the clamping jaw is fixedly connected to the bottom end of the connecting rod, the push plate is clamped to the inner surface of the clamping jaw, the limiting lug is fixedly connected to the inner wall of the drying box, a sliding groove is formed in the top of the drying box, the connecting rod and the inner surface of the sliding groove are slidably connected, the push plate and the inner surface of the drying box are slidably connected, and the outer surface of the push plate and the limiting lug is slidably connected, the net plate is opened, the solid drying agent is put into the drying box, and then the drying box is inserted into the limiting frame, when the distribution box is operated, the solid drying agent in the drying box can absorb the moisture in the air in the box body, the push block is reciprocally moved when the reciprocating screw rod is rotated, the connecting rod is reciprocally moved by the push block, the push plate is reciprocally slid on the surface of the limiting lug in the drying box by the clamping jaw, the push plate is clamped to the limiting lug to reduce the friction when sliding, and the push plate will not be deviated and overturned by the friction, the solid drying agent in the drying box is pushed and turned when the push plate is reciprocally slid, when the drying agent reaches a certain use time, the screw at the connecting position of the push block and the connecting rod is unscrewed, the connecting rod and the push plate are separated, and then the drying box can be taken out of the box body, so that the solid drying agent in the drying box can be replaced.

[0007] According to the technical scheme, the conductive device comprises a mounting frame, a conductive sheet and a conductive metal wire, the mounting frame is fixedly connected to the rear side of the inner wall of the box body, the conductive sheet is fixedly connected to the two sides of the mounting frame, and the conductive metal wire is fixedly connected to the rear side of the connecting rod, the conductive device further comprises an insulating sleeve, an insulating box, a conductive plate, a grounding nail and an insulating foot pad, the insulating sleeve is fixedly connected to the inner surface of the rear side of the box body, the insulating box is fixedly connected to the rear side of the box body, the conductive plate is fixedly connected to the bottom of the insulating box, the grounding nail is fixedly connected to the bottom surface of the conductive plate, and the insulating foot pad is fixedly connected to the bottom surface of the box body, the inner surface of the conductive metal wire and the conductive sheet is slidably connected, the inner surface of the conductive metal wire and the insulating sleeve is slidably connected, and the grounding nail penetrates through the bottom surface of the insulating box, when the electrical element is electrified, the current will first flow to the mounting frame, and then be introduced into the conductive sheet through the mounting frame, at this time, the connecting rod is reciprocally moved, and the metal conductive wire is slid in the conductive sheet, the metal conductive wire and the conductive sheet are slid to generate friction, so that the metal conductive wire can quickly absorb the current, then the current is led out of the box body through the metal conductive wire, and in the process that the current is led out of the box body by the conductive metal wire, the insulating sleeve can avoid the direct contact between the current and the box body, prevents the current from being absorbed by the box body, at the same time, the insulating box can avoid the contact between the conductive metal wire and the external object, the current is conducted to the conductive plate by the conductive metal wire, and then the current is introduced into the ground through the grounding nail and dissipated, and the insulating foot pad can block the contact between the current and the ground.

[0008] Compared with the prior art, the present application has the advantages that:

[0009] The present application, by setting up insulation board one, insulation board two, bump, push block, clamping plate, slide shaft, combines insulation board one and insulation board two, blocks the heat dissipation groove, seals the box body, avoids the dust in the box body from absorbing electric charge and then floating to the outside of the box body, and the dust that has absorbed electric charge is easy to produce static electricity, which has safety hazards if there are flammable and explosive materials around, the slide shaft pops up and inserts into the through hole to limit the clamping plate, so that the insulation board one and the insulation board two are more stable and the sealing performance is improved, thereby improving the anti-creeping effect.

[0010] The present application, by setting up connecting rod, clamping jaw, push plate, limiting convex plate, the solid desiccant in the drying box can absorb the moisture in the air in the box body, and after the moisture is reduced, the current generated by the electrical components after the leakage can be quickly conducted to the box body through the moisture, thereby reducing the risk of leakage, and when the push plate reciprocatingly slides, it pushes the solid desiccant inside the drying box to turn over, thereby improving the contact efficiency of the micropores on the surface of the fixed desiccant and the air, and improving the efficiency of the fixed desiccant in absorbing moisture.

[0011] The present application, by setting up insulation sleeve, insulation box, conductive plate, grounding nail, insulating foot pad, the metal conductive wire can quickly absorb the current, and then the current is discharged from the box body through the metal conductive wire, preventing the electrical components from continuously leaking when they have not been repaired in time, and preventing the electrical components from being burned or exploded due to the overload of the electric charge in the box body, the insulation sleeve can prevent the current from directly contacting the box body, preventing the current from being absorbed by the box body, the insulation box can prevent the conductive metal wire from contacting external objects, the grounding nail can guide the current to the ground to dissipate, and the insulating foot pad can block the contact between the box body and the ground, making the conduction process safer and improving the protection effect. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the present application, and do not constitute a limitation on the present application.

[0013] In the drawings:

[0014] Figure 1 is a schematic diagram of the overall structure of the present application;

[0015] Figure 2 is a schematic diagram of the front side cross-sectional structure of the present application;

[0016] Figure 3 is a schematic diagram of the front side cross-sectional structure of part of the structure of the present application;

[0017] Figure 4 is a schematic diagram of the front side cross-sectional structure of the insulation board one and the insulation board two of the present application;

[0018] Figure 5 is the amplification structure of A in the present application Figure 4 ;

[0019] Figure 6 is the front side sectional structure schematic diagram of the drying device in the present application

[0020] Figure 7 is the amplification structure of B in the present application Figure 6 ;

[0021] Figure 8 is the rear side sectional structure schematic diagram of the conductive device in the present application

[0022] In the figure: 1, box body; 2, driving device; 3, bidirectional screw rod; 4, inductor; 5, slide rail; 6, insulating plate one; 61, insulating plate two; 62, protruding block; 63, push block; 64, clamping plate; 65, slide shaft; 7, drying device; 71, limiting frame; 72, drying box; 73, mesh plate; 74, connecting rod; 8, conductive device; 81, mounting frame; 82, conductive sheet; 83, conductive metal wire; 84, insulating sleeve; 85, insulating box; 86, conductive plate; 87, grounding nail; 88, insulating foot pad. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0024] Please refer to Figures 1-8One embodiment of the present application is: a distribution box with insulation function, comprising a box body 1, the outer surface of the box body 1 is fixedly connected with a driving device 2, the inner surface of the driving device 2 is drivingly connected with a bidirectional screw rod 3, the outer surface of the bidirectional screw rod 3 is movably connected with a push block 63, the inner wall rear side of the box body 1 is fixedly connected with an inductor 4, the inner wall two sides of the box body 1 are fixedly connected with sliding rails 5, the inner surface of the sliding rail 5 is slidingly connected with an insulation plate one 6 and an insulation plate two 61, the bottom surface of the insulation plate one 6 and the insulation plate two 61 is fixedly connected with a protruding block 62, the rear side of the insulation plate one 6 is fixedly connected with a clamping plate 64, the inner surface of the insulation plate two 61 is slidingly connected with a sliding shaft 65, the insulation plate one 6 and the insulation plate two 61 are combined, the heat dissipation groove is blocked, the box body 1 is sealed, the dust in the box body 1 is prevented from floating to the outside of the box body 1 after absorbing electric charge, the dust with electric charge is prone to produce static electricity after accumulation, if there are flammable and explosive materials around, there will be safety hazards, the bottom of the box body 1 is provided with a drying device 7 for absorbing moisture to prevent moisture conduction caused by leakage to cause current diffusion in the box body 1, the rear side of the box body 1 is provided with a conductive device 8 for quickly conducting the current to the ground to dissipate after the electrical element leaks, the bidirectional screw rod 3 penetrates through the rear side of the box body 1, the bidirectional screw rod 3 is rotatably connected with the inner wall front side of the box body 1, the two sides of the box body 1 are provided with heat dissipation grooves, the spring is arranged between the sliding shaft 65 and the insulation plate two 61, the inner side of the clamping plate 64 is provided with a through hole, the sliding shaft 65 is popped up and inserted into the through hole to limit the clamping plate 64, the insulation plate one 6 and the insulation plate two 61 are more stable after being combined, the sealing performance is improved, and the leakage prevention effect is improved.

[0025] Working principle: when the inductor 4 senses that the electrical element in the box body 1 leaks, an electric signal is sent to the driving device 2, the driving device 2 starts after receiving the signal, and drives the bidirectional screw rod 3 to rotate, the bidirectional screw rod 3 drives the two push blocks 63 to approach each other when rotating, the two push blocks 63 push the two protruding blocks 62 to approach, and the two protruding blocks 62 drive the insulation plate one 6 and the insulation plate two 61 to combine, block the heat dissipation groove, seal the box body 1, prevent the dust in the box body 1 from floating to the outside of the box body 1 after absorbing electric charge, the dust with electric charge is prone to produce static electricity after accumulation, if there are flammable and explosive materials around, there will be safety hazards, the clamping plate 64 on the insulation plate one 6 is inserted into the inside of the insulation plate two 61 when the insulation plate one 6 and the insulation plate two 61 combine, and the clamping plate 64 pushes the sliding shaft 65 to slide downward, when the through hole on the clamping plate 64 is aligned with the sliding shaft 65, the spring below the sliding shaft 65 makes the sliding shaft 65 pop up and insert into the through hole to limit the clamping plate 64, the insulation plate one 6 and the insulation plate two 61 are more stable after being combined, the sealing performance is improved, and the leakage prevention effect is improved, when the leakage problem of the electrical element is solved, the insulation plate one 6 and the insulation plate two 61 are separated, so that the heat generated by the electrical element when working again can be dissipated from the heat dissipation groove.

[0026] Please refer to Figures 1-8On the basis of the above-mentioned embodiments, in another embodiment of the present application, the drying device 7 is provided, which comprises a limiting frame 71, a drying box 72 and a mesh plate 73, the limiting frame 71 is fixedly connected to the bottom of the box body 1, the drying box 72 is arranged inside the limiting frame 71, and the mesh plate 73 is hingedly connected to the side of the drying box 72, the solid desiccant in the drying box 72 can adsorb the moisture in the air in the box body 1, and after the moisture is reduced, the current generated after the electrical element is leaked can be prevented from being quickly conducted to the box body 1 through the moisture, thereby reducing the risk of leakage, the drying device 7 further comprises a connecting rod 74, a clamping jaw 75, a push plate 76 and a limiting lug 77, the connecting rod 74 is fixedly connected to the inner surface of the push block 63, the clamping jaw 75 is fixedly connected to the bottom end of the connecting rod 74, the push plate 76 is clamped to the inner surface of the clamping jaw 75, and the limiting lug 77 is fixedly connected to the inner wall of the drying box 72, a sliding groove is formed in the top of the drying box 72, the connecting rod 74 and the inner surface of the sliding groove are in sliding connection, the push plate 76 and the inner surface of the drying box 72 are in sliding connection, and the outer surfaces of the push plate 76 and the limiting lug 77 are in sliding connection, when the push plate 76 reciprocally slides, the solid desiccant in the drying box 72 is pushed to turn over, the contact efficiency between the micropores on the surface of the fixed desiccant and the air is improved, and the efficiency of the fixed desiccant in adsorbing moisture is improved.

[0027] Working principle: the solid desiccant is put into the drying box 72 by opening the mesh plate 73, and then the drying box 72 is inserted into the limiting frame 71, when the distribution box is running, the solid desiccant in the drying box 72 can adsorb the moisture in the air in the box body 1, and after the moisture is reduced, the current generated after the electrical element is leaked can be prevented from being quickly conducted to the box body 1 through the moisture, thereby reducing the risk of leakage, when the reciprocating screw rod rotates, the push block 63 reciprocally moves, the connecting rod 74 reciprocally moves under the action of the push block 63, the push plate 76 reciprocally slides on the surface of the limiting lug 77 in the drying box 72 under the action of the connecting rod 74 and the clamping jaw 75, the push plate 76 is clamped to the limiting lug 77 to reduce the friction when sliding, and will not be deviated and turned over under the influence of the friction, when the push plate 76 reciprocally slides, the solid desiccant in the drying box 72 is pushed to turn over, the contact efficiency between the micropores on the surface of the fixed desiccant and the air is improved, and the efficiency of the fixed desiccant in adsorbing moisture is improved, when the desiccant reaches a certain use time, the screw at the connecting position of the push block 63 and the connecting rod 74 is unscrewed, the connecting rod 74 and the push plate 76 are separated, and then the drying box 72 can be taken out of the box body 1, so that the solid desiccant in the drying box 72 can be replaced.

[0028] Please refer to Figures 1-8On the basis of the above embodiment, in another embodiment of the present application, the electrically conductive device 8 includes a mounting bracket 81, an electrically conductive sheet 82, and an electrically conductive wire 83. The mounting bracket 81 is fixedly connected to the rear inner wall of the box body 1. The electrically conductive sheet 82 is fixedly connected to both sides of the mounting bracket 81. The electrically conductive wire 83 is fixedly connected to the rear side of the connecting rod 74. The metal conductive wire can quickly absorb the current, and then the current is discharged from the box body 1 through the metal conductive wire. When the electrical components are not repaired in time and continue to leak, the overloading of the electric charge in the box body 1 causes the electrical components to burn out or explode. The electrically conductive device 8 further includes an insulating sleeve 84, an insulating box 85, an electrically conductive plate 86, a grounding nail 87, and an insulating foot pad 88. The insulating sleeve 84 is fixedly connected to the rear inner surface of the box body 1. The insulating box 85 is fixedly connected to the rear side of the box body 1. The electrically conductive plate 86 is fixedly connected to the bottom of the insulating box 85. The grounding nail 87 is fixedly connected to the bottom surface of the electrically conductive plate 86. The insulating foot pad 88 is fixedly connected to the bottom surface of the box body 1. The electrically conductive wire 83 and the inner surface of the electrically conductive sheet 82 are slidingly connected. The electrically conductive wire 83 and the inner surface of the insulating sleeve 84 are slidingly connected. The grounding nail 87 penetrates through the bottom surface of the insulating box 85. The insulating sleeve 84 can avoid direct contact between the current and the box body 1, preventing the current from being absorbed by the box body 1. The insulating box 85 can avoid contact between the electrically conductive wire 83 and external objects. The grounding nail 87 can guide the current to the ground for dissipation. The insulating foot pad 88 can block the contact between the box body 1 and the ground, making the electric conduction process safer and improving the protection effect.

[0029] Working principle: When the electrical components leak, the current will first flow to the mounting bracket 81, and then be guided to the electrically conductive sheet 82 through the mounting bracket 81. At this time, the connecting rod 74 reciprocally moves and drives the metal conductive wire to slide in the electrically conductive sheet 82. The metal conductive wire and the electrically conductive sheet 82 generate friction when sliding, so that the metal conductive wire can quickly absorb the current, and then the current is discharged from the box body 1 through the metal conductive wire. When the electrical components are not repaired in time and continue to leak, the overloading of the electric charge in the box body 1 causes the electrical components to burn out or explode. In the process of guiding the current out of the box body 1 by the electrically conductive wire, the insulating sleeve 84 can avoid direct contact between the current and the box body 1, preventing the current from being absorbed by the box body 1. At the same time, the insulating box 85 can avoid contact between the electrically conductive wire 83 and external objects. The electrically conductive wire 83 conducts the current to the electrically conductive plate 86, which then guides the current to the ground for dissipation through the grounding nail 87. The insulating foot pad 88 can block the contact between the box body 1 and the ground, making the electric conduction process safer and improving the protection effect.

[0030] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such 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.

[0031] Finally, it should be noted that the above-mentioned only constitutes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications, equivalent replacements, and improvements of the technical solutions described in the foregoing embodiments can be made. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall fall within the scope of the present application.

Claims

1. A distribution box with insulation function, comprising a box body (1), characterized in that: The outer surface of the box (1) is fixedly connected with a driving device (2), the inner surface of the driving device (2) is drivingly connected with a bidirectional screw rod (3), the outer surface of the bidirectional screw rod (3) is movably connected with a push block (63), the inner wall rear side of the box (1) is fixedly connected with an inductor (4), the inner wall two sides of the box (1) are fixedly connected with slide rails (5), the inner surface of the slide rails (5) is slidingly connected with an insulating plate one (6) and an insulating plate two (61), the bottom surface of the insulating plate one (6) and the insulating plate two (61) is fixedly connected with a protruding block (62), the rear side of the insulating plate one (6) is fixedly connected with a clamping plate (64), the inner surface of the insulating plate two (61) is slidingly connected with a slide shaft (65); The bottom of the box (1) is provided with a drying device (7) for absorbing moisture to avoid leakage of moisture and resulting in current diffusion in the box (1); The bidirectional screw rod (3) penetrates through the rear side of the box (1), the bidirectional screw rod (3) is rotatably connected with the inner wall front side of the box (1), the two sides of the box (1) are provided with heat dissipation grooves, the spring is arranged between the slide shaft (65) and the insulating plate two (61), and the inner side of the clamping plate (64) is provided with a through hole; The drying device (7) comprises a limiting frame (71), a drying box (72) and a mesh plate (73), the limiting frame (71) is fixedly connected to the bottom of the box (1), the drying box (72) is arranged inside the limiting frame (71), and the mesh plate (73) is hingedly connected to the side of the drying box (72); The drying device (7) further comprises a connecting rod (74), a clamping jaw (75), a push plate (76) and a limiting protruding plate (77), the connecting rod (74) is fixedly connected to the inner surface of the push block (63), the clamping jaw (75) is fixedly connected to the bottom end of the connecting rod (74), the push plate (76) is clamped to the inner surface of the clamping jaw (75), and the limiting protruding plate (77) is fixedly connected to the inner wall of the drying box (72); A sliding groove is formed in the top of the drying box (72), the connecting rod (74) and the inner surface of the sliding groove are slidingly connected, the push plate (76) and the inner surface of the drying box (72) are slidingly connected, and the push plate (76) and the outer surface of the limiting protruding plate (77) are slidingly connected; The rear side of the box (1) is provided with a conductive device (8) for quickly guiding the current to the ground for dissipation after the electrical element leaks, the conductive device (8) comprises a mounting frame (81), a conductive sheet (82) and a conductive metal wire (83), the mounting frame (81) is fixedly connected to the inner wall rear side of the box (1), the conductive sheet (82) is fixedly connected to the two sides of the mounting frame (81), and the conductive metal wire (83) is fixedly connected to the rear side of the connecting rod (74).

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