Bus switching device of high-voltage cabinet

Abstract

A high-voltage cabinet bus switching device disclosed by the present invention comprises a box body with openings at two ends and a bus passing through the opening of the box body, the bus is formed by overlapping a plurality of layers of copper sheets, the bus is provided with an output end and two input ends, the output end passes through a first floating sealing mechanism fixed at the opening of the box body, and the output end passes through a second floating sealing mechanism fixed at the opening of the box body. The input ends penetrate through a second floating sealing mechanism fixed to an opening of the box body, a gap maintaining mechanism is arranged on the inner side of the box body and used for separating the copper sheets at the platform section, and when the two input ends get close to each other, the gap maintaining mechanism is used for separating the copper sheets at the platform section. The input end of the bus is in a floating state, the bus can be attached to an output copper bar of a circuit breaker of a high-voltage cabinet during installation, installation stress is eliminated, installation reliability is improved, the heat dissipation performance is good, the service life of the high-voltage cabinet is prolonged, and the service life of the high-voltage cabinet is prolonged. And the overload capacity is high.

Description

Technical Field

[0001] The invention relates to a busbar, in particular to a high-voltage cabinet busbar switching device. Background Art

[0002] High-voltage switchgear is a device used for power generation, transmission, distribution, power conversion and consumption in power systems, which plays the role of switching, control or protection. The circuit breaker is one of the key components of the high-voltage switchgear. Its front and rear ends are connected to the main circuit through busbar copper bars. The output end of some circuit breakers has three copper bars for output current. The end of the copper bar 601 is flattened and has a single through hole. The input end of the circuit breaker is a high-voltage bushing seat. In order to adapt to this circuit breaker, the input end of the circuit breaker is connected to the main line through a cable, and the output end of the circuit breaker is connected to the transformer through the busbar copper bar. Since the busbar copper bar is long (usually more than 1 meter long) and thick (usually more than 8mm thick), the output end of the circuit breaker is subjected to greater force during installation. The connection between the output end of the circuit breaker and the busbar copper bar is prone to excessive temperature rise, which leads to frequent shutdown failures. In view of the above defects, it is necessary to design a high-voltage cabinet busbar switching device. Summary of the invention

[0003] The object of the present invention is to provide a high-voltage cabinet busbar adapter, in which the input end of the busbar of the high-voltage cabinet busbar adapter is in a floating state, and can fit the circuit breaker output copper rod of the high-voltage cabinet during installation, thereby eliminating installation stress, improving installation reliability, and having good heat dissipation performance and strong overload capacity.

[0004] To solve the above technical problems, the technical solution of the present invention is: a high-voltage cabinet busbar switching device, comprising a box with openings at both ends and a busbar passing through the box opening, the busbar is composed of several layers of copper sheets stacked together, the busbar is provided with an output end and two input ends, the middle section of the busbar is provided with a bent platform section, gaps are provided between the multiple copper sheets of the platform section, the output end passes through a first floating sealing mechanism fixed at the box opening, the input end passes through a second floating sealing mechanism fixed at the box opening, a gap retaining mechanism is provided inside the box, the gap retaining mechanism is used to separate the multiple copper sheets at the platform section, when the two When the input ends are close to each other, the medium in the second floating sealing mechanism is driven to enter the gap maintaining mechanism to drive the multiple copper sheets at the platform section to approach the axial direction of the box body. In order to ensure the stability of the gap between the multiple copper sheets of the platform section, the thickness of the copper sheets is selected to be 1-1.5mm, which has a certain strength. The platform section formed by bending the multiple copper sheets can maintain a relatively stable gap, and when the two input ends move relative to each other, the bending part has a large rigidity and is not easy to deform and bend. The platform section is bent by force. Viewed from the center direction, the platform section at the far end is subjected to large bending deformation, while the platform section at the proximal end is subjected to small bending deformation, thereby ensuring the gap between the platform sections.

[0005] The inner copper sheet of the platform section is provided with equalizing holes, which are arranged in a staggered manner to extend the path of the current. Since the length of the inner copper sheet is smaller than that of the outer copper sheet, in order to ensure the uniform passage of current, the design of equalizing holes is adopted to extend the distance of the current passing through the inner copper sheet and achieve equal current.

[0006] The present invention is further improved as follows:

[0007] Furthermore, the box is filled with insulating oil.

[0008] Furthermore, a plurality of copper sheets are connected as one at the end of the input end, and a plurality of copper sheets are connected as one at the end of the output end.

[0009] Furthermore, the first floating sealing mechanism includes a first shell with grooves on the bottom and top surfaces, a first sealing bag is provided inside the first shell, a first partition is provided inside the first sealing bag, the first partition separates the first sealing bag into two first cavities, the cavities of the two first cavities are interconnected, the first partition is provided with a first through hole, the first through hole is fitted with the output end, the side wall of the first partition is provided with a heat conductive block, one end of the heat conductive block is fitted with the output end, and the other end extends into the first cavity.

[0010] Furthermore, the second floating sealing mechanism includes a second shell with grooves on the bottom and top surfaces, a second sealing bag is provided inside the second shell, two second partitions are provided inside the second sealing bag, the two second partitions separate the second sealing bag into three second cavities that are not interconnected, the second partition is provided with a second through hole, the second through hole is fitted with the input end, the side wall of the second partition is provided with a heat conductive block, one end of the heat conductive block is fitted with the input end, and the other end extends into the second cavity.

[0011] Furthermore, the thickness of the top wall and the bottom wall of the first sealed bag is smaller than the thickness of the side wall.

[0012] Furthermore, the thickness of the top wall and the bottom wall of the second sealed bag is smaller than the thickness of the side wall.

[0013] Furthermore, the gap maintaining mechanism includes a cylinder body with openings at both ends, the cylinder body is provided with symmetrically arranged sliders, an elastic member is provided between the two sliders, a plurality of retaining rods penetrating the cylinder body are provided on the side walls of the slider, the retaining rods are inserted into the gaps between the copper sheets of the platform section, a third sealing bag is provided on the inner side of the slider, one end of the third sealing bag extends into the inner side of the slider, and the other end is sleeved on the outer side of the opening of the cylinder body, the end cover is fixed at the opening of the cylinder body, and the cavity of the third sealing bag is communicated with the cavity of the second cavity through a pipe.

[0014] Furthermore, the slider is provided with a receiving groove which does not penetrate the slider body, the end of the third sealing bag is contracted in the receiving groove, a reverse thrust structure is provided in the receiving groove, and when the third sealing bag is filled with the medium, the end of the third sealing bag extends to push the reverse thrust structure to drive the slider forward.

[0015] Furthermore, a vent hole is provided at the bottom of the slider, and the vent hole passes through the slider.

[0016] Compared with the prior art, when the high-voltage cabinet busbar switching device is installed, the two input ends move relative to each other. At this time, the pressure in the second cavity surrounded by the two second partitions increases, and the medium in the second cavity enters the third sealing bag along the pipeline through the connecting hole provided in the second cavity between the two second partitions. The end of the third sealing bag extends and contacts with the reverse thrust structure to apply a forward thrust to push the slider forward, the elastic part shrinks under pressure, and the retaining rod brings the platform section closer to the central axis of the busbar. At this time, since there are bends at both ends of the platform section, it is not easy to deform at the bend. Therefore, the platform section is deformed by the action of the retaining rod, and "concave" appears, which drives the platform section to the multiple copper sheets between the input end and the output end to appear stratified to varying degrees. On the one hand, the conductive cross-sectional area is increased, and on the other hand, the oil can enter between the copper sheets of this section, thereby improving the heat dissipation performance and further improving the overload capacity of the busbar.

[0017] The present invention has the following beneficial effects:

[0018] 1. Due to the use of two input terminals and the design of the second sealing capsule, the input terminal of the busbar is in a floating state, which can fit the output copper rod of the circuit breaker of the high-voltage cabinet during installation, eliminating installation stress and improving installation reliability;

[0019] 2. The busbar is designed with a platform section composed of multiple layers of copper sheets, and a gap-keeping mechanism is used to separate the multiple layers of copper sheets to maintain a certain distance. The medium extruded by the second sealing capsule during installation drives the gap-keeping mechanism to drive the busbar to follow, thereby ensuring the spacing between the copper sheets between the platform sections. Due to the skin effect of the current, the platform section can pass a larger current. At the same time, the box is filled with insulating oil, which can introduce the heat at the joint into the insulating oil of the box, thereby improving the overload capacity of the busbar. Therefore, small-interface copper sheets can be used to pass large current conditions;

[0020] 3. The first sealing bag and the second sealing bag are compressible and can produce a certain amount of deformation. Therefore, when used in a vibration environment such as transportation, they can produce a certain amount of deformation to eliminate the impact of vibration on the joint and improve the reliability of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of the present invention is shown

[0022] Figure 2 The three-dimensional diagram of the busbar of the present invention is shown

[0023] Figure 3 A three-dimensional diagram showing the copper sheets constituting the busbar of the present invention

[0024] Figure 4 A three-dimensional diagram showing another embodiment of the present invention

[0025] Figure 5 A cross-sectional view showing a first floating seal mechanism of the present invention

[0026] Figure 6 A cross-sectional view showing a second floating seal mechanism of the present invention

[0027] Figure 7 A schematic diagram showing the structure of the gap maintaining mechanism of the present invention

[0028] Figure 8 A schematic diagram showing the structure of the slider of the present invention

[0029] Fig. 9 A schematic diagram showing another embodiment of the slider of the present invention

[0030] Fig.10 Three-dimensional diagram showing the present invention when installed

[0031] Fig.11 A three-dimensional diagram showing another embodiment of the present invention

[0032] In the figure: box 1, busbar 2, first floating sealing mechanism 3, second floating sealing mechanism 4, gap maintaining mechanism 5, circuit breaker 6, radiator 7, quick connector 8, cover plate 101, output end 201, input end 202, platform section 203, flow equalizing hole 204, extension section 205, first shell 301, first sealing capsule 302, first partition 303, first cavity 304, first through hole 305, heat conductive block 306, second shell 401, third sealing capsule 402, second partition 403, second cavity 404, second through hole 405, connecting hole 406, cylinder body 501, slider 502, elastic member 503, retaining rod 504, third sealing capsule 505, end cover 506, accommodating groove 507, vent 508, inclined surface 509, spherical push head 510. DETAILED DESCRIPTION

[0033] like Figures 1 to 11As shown, a high-voltage cabinet busbar switching device comprises a box body 1 with openings at both ends and a busbar 2 passing through the opening of the box body 1, wherein the busbar 2 is formed by stacking several layers of copper sheets; the busbar 2 is provided with an output end 201 and two input ends 202, the middle section of the busbar 2 is provided with a bent platform section 203, gaps are provided between the multiple copper sheets of the platform section 203, the output end 201 passes through a first floating sealing mechanism 3 fixed at the opening of the box body 1, the input end 202 passes through a second floating sealing mechanism 4 fixed at the opening of the box body 1, a gap retaining mechanism 5 is provided on the inner side of the box body 1, the gap retaining mechanism 5 is used to separate the multiple copper sheets at the platform section 203, and when the two input ends 201 are close to each other, the medium in the second floating sealing mechanism 4 is driven to enter the gap retaining mechanism 5 to drive the multiple copper sheets at the platform section 203 to approach the axis direction of the box body 1.

[0034] In this embodiment, Figure 1 , Figure 2 As shown, the box body 1 is also provided with a cover plate 101, and the cover plate 101 is detachably sealed and connected to the box body 1. The box body 1 is filled with insulating oil for insulation and heat dissipation. The gaps between the multiple copper sheets of the platform section 203 are filled with insulating oil. Due to the presence of the insulating oil, the designed first floating sealing mechanism 3 and the second floating sealing mechanism 4 seal the opening of the box body 1 on the one hand, and seal the output end 201 and the input end 202 on the other hand. The multiple copper sheets at the end of the input end 202 are connected as a whole, and the multiple copper sheets at the end of the output end 201 are connected as a whole. Ultrasonic welding is generally used, and traditional brazing can also be used. The copper sheets welded in multiple layers have higher strength, which improves the stability of the connection. At the same time, the one-piece structure is easy to seal and prevent leakage of insulating oil.

[0035] In addition, if Figure 2 As shown, in order to ensure the stability of the gap between the multiple copper sheets of the platform segment 203, the thickness of the copper sheet is selected to be 1-1.5mm, which has a certain strength. The platform segment 203 formed by bending the multiple copper sheets can maintain a relatively stable gap, and when the two input ends 202 move relative to each other, the bending part has a large rigidity and is not easy to deform and bend. The platform segment 203 is bent by force. From the center direction, the platform segment 203 at the far end is bent more deformed by force, and the platform segment 203 at the near end is bent less deformed by force, so that the gap between the platform segments 203 can be ensured.

[0036] In this embodiment, Figure 3 As shown, the inner copper sheet of the platform section 203 is provided with current balancing holes 204, and the current balancing holes 204 are arranged in a staggered manner to extend the path of the current. Since the length of the inner copper sheet is smaller than that of the outer copper sheet, in order to ensure the uniform passage of the current, the design of the current balancing holes 204 is adopted, which extends the distance of the current passing through the inner copper sheet and realizes current balancing.

[0037] like Figure 4 As shown, in other embodiments, in order to simplify the copper busbar structure of the access circuit, an extension section 205 is designed at the end of the input end 201, and the extension section 205 is adapted to the copper busbar structure of the access circuit to avoid bending of the copper busbar structure of the access circuit, thereby effectively avoiding installation difficulties and manufacturing difficulties caused by errors.

[0038] In this embodiment, Figure 2 , Figure 5 As shown, the first floating sealing mechanism 3 includes a first shell 301 with grooves on the bottom and top surfaces, a first sealing capsule 302 is arranged inside the first shell 301, a first partition 303 is arranged inside the first sealing capsule 302, the first partition 303 separates the first sealing capsule 302 into two first cavities 304, the cavities of the two first cavities 304 are interconnected, the first partition 303 is provided with a first through hole 305, the first through hole 305 is in contact with the output end 201, and the side wall of the first partition 303 A heat conductive block 306 is provided, one end of which is in contact with the output end 201, and the other end extends into the first cavity 304. The first sealing bag 302 is placed in the first shell 301 through the grooves on the bottom and the top before being inflated. An inflation nozzle is provided on the first sealing bag 302, and a medium, preferably nitrogen, is injected into the first cavity 304 in the first sealing bag 302 through the inflation nozzle. The inflation pressure is 0.15-0.18MPa. Under this pressure, the first partition plate 303 tightly covers the output end 201 to prevent oil leakage.

[0039] Among them, the thickness of the top wall and the bottom wall of the first sealing bag 302 is smaller than the thickness of the side wall. When the output end 201 is subjected to force, the pressure in the first cavity 304 in the force direction increases, and the media in the two opposite first cavities 304 flow relative to each other. The top wall and the bottom wall of the first sealing bag 302 are deformed first, so that the output end 201 can be offset in the force direction, thereby compensating for the relative movement caused by errors, vibrations, etc., and avoiding damage to the device caused by stress.

[0040] In addition, the heat conducting block 306 is made of pure aluminum, and after being in close contact with the output end 201, it can conduct heat into the first cavity 304, thereby increasing the heat dissipation area and preventing high temperature from scalding the first silica gel partition 303. In other embodiments, the first sealing capsule 303 is connected to the gas circuit, and pressure control and heat dissipation are performed through the control of the gas circuit.

[0041] In this embodiment, Figure 2 , Figure 6As shown, the second floating sealing mechanism 4 includes a second shell 401 with grooves on the bottom and top surfaces, a second sealing bag 402 is arranged inside the second shell 401, two second partitions 403 with the same structure are arranged inside the second sealing bag 402, the two second partitions 403 separate the second sealing bag 402 into three second cavities 404 that are not connected to each other, the second partition 403 is provided with a second through hole 404, the second through hole 404 is in contact with the input end 202, the side wall of the second partition 403 is provided with a heat conductive block 306, one end of the heat conductive block 306 is in contact with the input end 202, and the other end extends into the second cavity 404, the second sealing bag 402 is not inflated through the openings on the bottom and top surfaces. The groove is placed in the second shell 401, and an inflation nozzle is provided on the second sealing bag 402. The medium, preferably nitrogen, is filled into the second cavity 404 surrounded by the second partition 403 and the second sealing bag 402 through the inflation nozzle. The inflation pressure is 0.15-0.18MPa. The medium, preferably nitrogen, is filled into the second cavity 404 surrounded by the two second partitions 403. The inflation pressure is 0.2-0.25MPa. At this time, due to the bending of the platform section 203, a reaction force is generated when it is subjected to the force generated by the pressure difference at both ends of the second partition 403 to maintain the balance of the positions of the two input ends 202. At the same time, due to the pressure at both ends of the input end 202, the second partition 403 made of silicone rubber fits with the input end 202 to prevent oil leakage.

[0042] Among them, the thickness of the top wall and the bottom wall of the second sealing bag 402 is smaller than the thickness of the side wall. When the two input ends 202 are subjected to force, the medium in the second cavity 404 surrounded by the two second partitions 403 enters the gap maintaining mechanism 5 along the pipeline through the connecting hole 406 provided in the second cavity between the two second partitions, and the top wall and the bottom wall of the second sealing bag 402 are deformed, so that the two input ends 202 are closed and maintained in a sealed state.

[0043] In this embodiment, Figure 7As shown, the gap holding mechanism 5 includes a cylinder 501 with openings at both ends, wherein the cylinder 501 is provided with symmetrically arranged sliders 502, wherein an elastic member 503 is provided between the two sliders 502, wherein a plurality of retaining rods 504 penetrating the cylinder 501 are provided on the side walls of the slider 502, wherein the retaining rods 504 are inserted into the gaps between the copper sheets in the platform section 203, wherein a third sealing capsule 505 is provided inside the slider 502, wherein one end of the third sealing capsule 505 extends into the inside of the slider 502, and the other end is sleeved on the opening of the cylinder 501. The end cover 506 is fixed at the opening of the cylinder body, the cavity of the third sealing bag 505 is communicated with the cavity of the second cavity 404 between the two second partitions 403 through a pipeline, the slider 502 is provided with a receiving groove 507 which does not penetrate the main body of the slider 502, the end of the third sealing bag 505 is contracted in the receiving groove 507, and a reverse thrust structure is provided in the receiving groove 507. When the third sealing bag 505 is filled with the medium, the end of the third sealing bag 505 extends to push the reverse thrust structure to drive the slider 502 to move forward.

[0044] Among them, Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, the reverse thrust structure is an inclined surface 509. In other embodiments, the reverse thrust structure is a ball head 510. When the two input ends 202 are closed by force, the pressure in the second cavity 404 surrounded by the two second partitions 403 increases, and the medium in the second cavity 404 enters the third sealing bag 505 along the pipeline through the connecting hole 406 provided in the second cavity between the two second partitions. The end of the third sealing bag 505 extends and contacts with the reverse thrust structure (inclined surface 509, ball head 510) to apply forward thrust to push the slider 502 forward, the elastic member 503 shrinks under pressure, and the retaining rod 504 moves the platform segment 203 closer to the central axis of the busbar 2, effectively avoiding large deformation of the platform segment 203 and the occurrence of problems such as overload caused by fitting, thereby improving working stability.

[0045] In addition, a vent hole 508 is provided at the bottom of the slider 502. The vent hole 508 runs through the slider 502 and is used to balance the pressure inside and outside the accommodating groove 507 to prevent air from being trapped between the slider 502 and the third sealing bag 505 and preventing the slider 502 from being fully extended and being unable to drive the slider 502 to slide normally.

[0046] Fig.101 is a schematic diagram of a circuit breaker installation structure according to an embodiment of the present invention, comprising a circuit breaker 6, wherein the circuit breaker 6 has three copper rods 601 for outputting current, the ends of the copper rods 601 are flattened and provided with a single through hole, the input end of the circuit breaker 6 is a high-voltage bushing seat 602, the copper rods 601 are fixed to the input end 202 of the busbar 2 by bolts, during installation, the operator adjusts the position of the box 1 so that the input end 202 of the busbar 2 is located on both sides of the copper rods 601, and bolts are passed through the mounting holes of the input end 202 and the copper rods 601, and when the bolts are tightened, the two input ends 202 move relative to each other, at which time, the pressure in the second cavity 404 surrounded by the two second partitions 403 increases, and the medium in the second cavity 404 is provided with a connecting hole at the second cavity 404 between the two second partitions 403. The through hole 406 enters the third sealing bag 505 along the pipeline, and the end of the third sealing bag 505 extends to contact the reverse thrust structure (inclined surface 509, ball head 510) to exert a forward thrust to push the slider 502 forward, and the elastic member 503 contracts under pressure, and the retaining rod 504 brings the platform section 203 closer to the central axis of the busbar 2. At this time, since there are bends at both ends of the platform section 203, it is not easy to deform at the bend. Therefore, the platform section 203 is deformed by the retaining rod 504 and becomes "concave", which in turn drives the platform section 203 to the multiple copper sheets between the input end 202 and the output end 201 to appear stratified to varying degrees. On the one hand, the conductive cross-sectional area is increased, and on the other hand, the oil can enter between the copper sheets of this section, thereby improving the heat dissipation performance and further improving the overload capacity of the busbar 2.

[0047] Among them, since the pressure in the second cavity 404 between the two second partitions 403 is higher than the pressure in the second cavity 404 between the two second partitions 403 and the second sealing bag 402, in the initial state, the second cavity 404 between the two second partitions 403 and the second sealing bag 402 is in a pressurized state. When the input end 202 is closed by force, since the thickness of the top wall and the bottom wall of the second sealing bag 402 is less than the thickness of the side wall, the second cavity 404 between the two second partitions 403 and the second sealing bag 402 is restored by the pressure, thereby pushing the second partition 403 to fit with the input end 202 to avoid leakage.

[0048] In addition, since the thickness of the top wall and the bottom wall of the first sealing bag 302 is smaller than the thickness of the side wall, when the output end 201 is subjected to force, the pressure in the first cavity 304 in the force direction increases, and the media in the two opposite first cavities 304 flow relative to each other. The top wall and the bottom wall of the first sealing bag 302 are deformed first, so that the output end 201 can be offset in the force direction, thereby compensating for the relative movement caused by errors, vibrations, etc., and avoiding damage to the device caused by stress.

[0049] It is worth noting that Fig.11As shown, by installing a radiator 7 on the outside of the box to increase the heat dissipation area, or adding a pipeline system 9 for insulating oil to enter and exit the box to output hot insulating oil and input cold insulating oil to improve the heat dissipation efficiency, thereby achieving efficient heat dissipation.

[0050] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A high-voltage cabinet busbar switching device, characterized in that It includes a box body with openings at both ends and a busbar passing through the box body openings, the busbar is formed by stacking several layers of copper sheets, the busbar is provided with an output end and two input ends, the middle section of the busbar is provided with a bent platform section, gaps are provided between the multiple copper sheets of the platform section, the output end passes through a first floating sealing mechanism fixed at the box body opening, the input end passes through a second floating sealing mechanism fixed at the box body opening, a gap maintaining mechanism is provided inside the box body, the gap maintaining mechanism is used to separate the multiple copper sheets at the platform section, when the two input ends are close to each other, the medium in the second floating sealing mechanism is driven to enter the gap maintaining mechanism to drive the multiple copper sheets at the platform section to approach the axis direction of the box body.

2. The high-voltage cabinet busbar switching device according to claim 1 is characterized in that The box is filled with insulating oil.

3. The high-voltage cabinet busbar switching device according to claim 1 is characterized in that A plurality of copper sheets are integrally connected at the end of the input end, and a plurality of copper sheets are integrally connected at the end of the output end.

4. The high-voltage cabinet busbar switching device according to claim 2 is characterized in that The first floating sealing mechanism includes a first shell with grooves on the bottom and top surfaces, a first sealing bag is arranged inside the first shell, a first partition is arranged inside the first sealing bag, the first partition divides the first sealing bag into two first cavities, the cavities of the two first cavities are interconnected, the first partition is provided with a first through hole, the first through hole is fitted with the output end, the side wall of the first partition is provided with a heat conductive block, one end of the heat conductive block is fitted with the output end, and the other end extends into the first cavity.

5. The high-voltage cabinet busbar switching device according to claim 2, characterized in that The second floating sealing mechanism includes a second shell with grooves on the bottom and top surfaces, a second sealing bag is arranged inside the second shell, two second partitions are arranged inside the second sealing bag, the two second partitions separate the second sealing bag into three second cavities that are not interconnected, the second partition is provided with a second through hole, the second through hole is fitted with the input end, the side wall of the second partition is provided with a heat conductive block, one end of the heat conductive block is fitted with the input end, and the other end extends into the second cavity.

6. The high-voltage cabinet busbar switching device according to claim 4, characterized in that The thickness of the top wall and the bottom wall of the first sealed bag is smaller than the thickness of the side wall.

7. The high-voltage cabinet busbar switching device according to claim 5, characterized in that The thickness of the top wall and the bottom wall of the second sealed bag is smaller than the thickness of the side wall.

8. The high-voltage cabinet busbar switching device according to claim 5, characterized in that The gap maintaining mechanism includes a cylinder body with openings at both ends, wherein symmetrically arranged sliders are arranged in the cylinder body, an elastic member is arranged between the two sliders, a plurality of retaining rods penetrating the cylinder body are arranged on the side walls of the slider, and the retaining rods are inserted into the gaps between the copper sheets of the platform section, a third sealing bag is arranged on the inner side of the slider, one end of the third sealing bag extends into the inner side of the slider, and the other end is sleeved on the outer side of the opening of the cylinder body, the end cover is fixed at the opening of the cylinder body, and the cavity of the third sealing bag is communicated with the cavity of the second cavity through a pipeline.

9. The high-voltage cabinet busbar switching device according to claim 8, characterized in that The slider is provided with a receiving groove which does not penetrate the slider body, the end of the third sealing bag is contracted in the receiving groove, a reverse thrust structure is provided in the receiving groove, and when the third sealing bag is filled with the medium, the end of the third sealing bag extends to push the reverse thrust structure to drive the slider forward.

10. The high-voltage cabinet busbar switching device according to claim 9, characterized in that A vent hole is also provided at the bottom of the slider, and the vent hole passes through the slider.

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