Voltage control cabinet and voltage control device for protector test

Abstract

The invention discloses a voltage control cabinet and a voltage control device for protector testing, and belongs to the technical field of voltage control equipment. The device comprises a cabinet body, the cabinet body is internally provided with a preset installation position used for installing a voltage controller body, and the cabinet body is provided with a plurality of first heat dissipation through holes; the electromagnetic shielding cover is arranged between the preset installation position and the first heat dissipation through hole, an electromagnetic shielding space is defined by the electromagnetic shielding cover and the cabinet body, a ventilation channel is reserved between the electromagnetic shielding cover and the cabinet body, and the ventilation channel is communicated with the electromagnetic shielding space and the first heat dissipation through hole; and the moving mechanism comprises a driving part and a moving part, the driving part is in transmission connection with the moving part, the moving part is arranged in the cabinet body, an electromagnetic shielding cover is installed on the moving part, and transmission of the driving part is used for driving the electromagnetic shielding cover to move close to or far away from the first heat dissipation through hole, so that the electromagnetic shielding space becomes larger or smaller. The problem that good heat dissipation and good electromagnetic shielding cannot be achieved at the same time in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of voltage control equipment, and in particular to a voltage control cabinet and a voltage control device for protecting device testing. Background Art

[0002] Voltage protection test is a test used to evaluate the voltage tolerance of electrical equipment, systems or devices. In the power system, various substation equipment in the substation, such as transformers, switch cabinets, etc., must undergo voltage protection tests to ensure that the equipment can withstand various overvoltages that may occur in the power grid and ensure the stability and safety of power transmission. Generally, voltage control devices are placed in voltage cabinets; currently, during the operation of the voltage control device, a large amount of heat will be emitted around the device. If the heat dissipation is not timely, it will affect the internal components of the device; and during the operation of the voltage control device, an electromagnetic field will appear. When the electromagnetic field is too large, it will interfere with the normal operation of the device.

[0003] In existing voltage control devices, for the sake of electromagnetic shielding effect, few or even no heat dissipation holes are opened, so that a large amount of heat accumulates inside the device, affecting components; however, opening too many heat dissipation holes for heat dissipation will weaken the electromagnetic shielding effect; and different voltage controllers have different heat dissipation and electromagnetic shielding requirements under different working conditions. Therefore, how voltage control cabinets and control devices can balance good heat dissipation and good electromagnetic shielding has become an urgent problem to be solved. Summary of the invention

[0004] The present invention provides a voltage control cabinet and a voltage control device for protector testing, aiming to solve the problem that the prior art cannot achieve both good heat dissipation and good electromagnetic shielding.

[0005] A first aspect of the present invention provides a voltage control cabinet for protector testing, comprising:

[0006] A cabinet body, wherein a preset installation position for installing a voltage controller body is provided in the cabinet body, and a plurality of first heat dissipation through holes are provided on the cabinet body;

[0007] An electromagnetic shielding cover, wherein the electromagnetic shielding cover is arranged between the preset installation position and the first heat dissipation through hole, the electromagnetic shielding cover and the cabinet body enclose an electromagnetic shielding space, a ventilation channel is left between the electromagnetic shielding cover and the cabinet body, and the ventilation channel is connected to the electromagnetic shielding space and the first heat dissipation through hole;

[0008] The moving mechanism includes a driving part and a moving part, the driving part is connected to the moving part by transmission, the moving part is arranged inside the cabinet body, the electromagnetic shielding cover is installed on the moving part, and the transmission of the driving part is used to drive the electromagnetic shielding cover to move closer to or farther from the first heat dissipation hole to make the electromagnetic shielding space larger or smaller.

[0009] In some embodiments of the first aspect, a second heat dissipation through hole that can be opened and closed is provided on the cabinet body, the second heat dissipation through hole is provided on the ventilation passage, and the second heat dissipation through hole is communicated with the ventilation passage.

[0010] In some embodiments of the first aspect, a plurality of second heat dissipation through holes are provided on the wall of the cabinet body;

[0011] A cover plate is flipably connected to the outer wall of the voltage control cabinet, and the cover plate can flipably cover the plurality of the second heat dissipation through holes;

[0012] An electric telescopic rod is connected to the inner side of the cover plate, and the electric telescopic rod is used to drive the cover plate to flip.

[0013] In some embodiments of the first aspect, a rod through slot is provided on the wall of the cabinet body, and a slide slot is provided on the cover plate;

[0014] The slotting axis of the rod-through slot and the slotting axis of the slide slot are in the same direction as the moving direction of the moving part;

[0015] One end of the electric telescopic rod is installed on the moving part, and the other end of the electric telescopic rod passes through the rod through slot and is slidably installed in the slide slot.

[0016] In some embodiments of the first aspect, at least one side of the electromagnetic shielding cover is provided with an opening, and the opening is in communication with both the ventilation passage and the electromagnetic shielding space;

[0017] The second heat dissipation through hole is not provided on the wall of the cabinet body adjacent to the opening.

[0018] In some embodiments of the first aspect, the preset installation position is provided at the bottom of the cabinet body;

[0019] The ventilation channel is arranged vertically;

[0020] The second heat dissipation through holes and the first heat dissipation through holes are arranged in sequence from the bottom of the cabinet body to the top of the cabinet body.

[0021] In some embodiments of the first aspect, the driving unit includes a driving motor and a reciprocating screw; the driving motor is transmission-connected to the reciprocating screw, and the axis direction of the reciprocating screw is vertically arranged;

[0022] The moving part includes a lifting block and a lifting frame; the lifting block is slidably installed on the reciprocating screw rod, the lifting frame is fixedly connected to the lifting block, the lifting block is also used to be fixedly connected to the electric telescopic rod, the lifting frame is slidably connected to the cabinet body, and the lifting frame is detachably connected to the electromagnetic shielding cover.

[0023] In some embodiments of the first aspect, the moving part further includes a limit block and a limit spring;

[0024] A limiting groove is provided in the lifting frame, and a limiting strip is provided on the outer wall of the electromagnetic shielding cover, and the limiting strip is installed in the limiting groove;

[0025] One end of the limiting groove is open, the open end of the lifting frame is provided with an arc-shaped through groove, and the limiting block covers the open end of the lifting frame;

[0026] A latch is provided on one side of the limiting block adjacent to the limiting groove, the latch is inserted into the arc-shaped through groove, and the limiting spring is compressed between the latch and the end of the arc-shaped through groove.

[0027] In some embodiments of the first aspect, a diameter of the second heat dissipation through hole is smaller than a diameter of the first heat dissipation through hole, and a hole density of the second heat dissipation through hole is greater than a hole density of the first heat dissipation through hole.

[0028] Another aspect of the present invention provides a voltage control device for protecting a device from being damaged, comprising:

[0029] The voltage control cabinet according to the first aspect;

[0030] A voltage controller body is arranged on the preset installation position.

[0031] It can be seen from the above technical solutions that the present invention has the following advantages:

[0032] The present embodiment provides a voltage control cabinet for protector testing, since the electromagnetic shielding cover and the cabinet body enclose an electromagnetic shielding space, the preset installation position is in the electromagnetic shielding space, which can provide a good electromagnetic shielding effect for the voltage controller; and the electromagnetic shielding cover is arranged between the first heat dissipation through hole and the preset installation position, the electromagnetic shielding space can be connected to the first heat dissipation through hole through the ventilation channel, and the heat inside the electromagnetic shielding space can be dissipated; since the electromagnetic shielding cover is connected to the moving part of the moving mechanism, its movement can drive the electromagnetic shielding cover to move closer to or farther from the first heat dissipation through hole, so that the electromagnetic shielding space becomes larger or smaller, so when it is applied, the electromagnetic shielding effect and the heat dissipation effect can be flexibly adjusted. The result is that the voltage control cabinet takes into account both the electromagnetic shielding effect and the heat dissipation effect. When the heat dissipation effect needs to be improved, the electromagnetic shielding cover is moved closer to the first heat dissipation through hole to increase the electromagnetic shielding space, the radiant heat dissipation is more sufficient, and the heat dissipation effect is good, wherein the electromagnetic shielding cover is always located between the heat dissipation through hole and the preset installation position, and the heat dissipation effect is improved while taking into account the electromagnetic shielding; when the electromagnetic shielding effect needs to be improved, the electromagnetic shielding cover is moved closer to the first heat dissipation through hole to reduce the electromagnetic shielding space, increase the number of electromagnetic wave reflections, and improve the absorption efficiency, wherein the electromagnetic shielding space is always connected to the first heat dissipation through hole, and the electromagnetic shielding effect is improved while taking into account the heat dissipation, which effectively solves the problem that the prior art cannot take into account both good heat dissipation and good electromagnetic shielding. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 A schematic diagram of the structure of a voltage control device for protecting a device according to an embodiment of the present invention;

[0035] Figure 2 A schematic cross-sectional structure diagram of a voltage control cabinet for protecting device testing provided by an embodiment of the present invention;

[0036] Figure 3 A partially enlarged cross-sectional structural schematic diagram of a voltage control cabinet for a protector test provided by an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of the structure of a cabinet body provided in an embodiment of the present invention;

[0038] Figure 5 A schematic diagram of the structure of a cover plate provided in an embodiment of the present invention;

[0039] Figure 6 A schematic diagram of the structure of an electromagnetic shielding cover provided by an embodiment of the present invention;

[0040] Figure 7 A schematic diagram of the structure of a lifting frame provided in an embodiment of the present invention;

[0041] Figure 8 A schematic structural diagram of a limit block provided in an embodiment of the present invention.

[0042] Reference numerals:

[0043] 1. Cabinet body; 10. Preset installation position; 11. First heat dissipation through hole; 12. Second heat dissipation through hole; 13. Cover plate; 130. Slide groove; 14. Electric telescopic rod; 15. Rod through groove;

[0044] 2. Electromagnetic shielding cover; 20. Electromagnetic shielding space; 21. Ventilation channel; 22. Opening; 23. Limiting strip;

[0045] 3. Moving mechanism; 30. Driving unit; 300. Driving motor; 301. Reciprocating screw rod; 31. Moving unit; 310. Lifting block; 311. Lifting frame; 3110. Limiting groove; 3111. Arc-shaped through groove; 312. Limiting block; 3120. Limiting pin; 313. Limiting spring; 314. Screw rod seat; 315. First connecting seat; 316. Second connecting seat; 317. T-block;

[0046] 4. Voltage controller body. DETAILED DESCRIPTION

[0047] The embodiment of the present invention provides a voltage control cabinet and a voltage control device for protector testing, which are used to solve the technical problem that the prior art cannot take into account both good heat dissipation and good electromagnetic shielding.

[0048] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] See also Figures 1 to 8 The present invention provides a voltage control cabinet for protecting device testing, comprising:

[0050] A cabinet body 1, wherein a preset installation position 10 for installing a voltage controller body 4 is provided in the cabinet body 1, and a plurality of first heat dissipation through holes 11 are provided on the cabinet body 1;

[0051] The electromagnetic shielding cover 2 is inside the cabinet body 1 and is located between the preset installation position 10 and the first heat dissipation through hole 11. The electromagnetic shielding cover 2 and the cabinet body 1 enclose an electromagnetic shielding space 20. A ventilation channel 21 is left between the electromagnetic shielding cover 2 and the cabinet body 1. The ventilation channel 21 is connected to the electromagnetic shielding space 20 and the first heat dissipation through hole 11.

[0052] The moving mechanism 3, the moving part 31 of the moving mechanism 3 is arranged inside the cabinet body 1, the electromagnetic shielding cover 2 is installed on the moving part 31, and the movement of the moving part 31 is used to drive the electromagnetic shielding cover 2 to move closer to or farther from the first heat dissipation hole 11 to make the electromagnetic shielding space 20 larger or smaller.

[0053] The electromagnetic shielding space 20 refers to the space enclosed by the electromagnetic shielding cover 2 and the side walls and bottom plate of the cabinet body 1. The longitudinal cross-sectional shape of the space is approximately "mouth" or "convex". The size of the electromagnetic shielding space 20 is adjusted by the moving mechanism 3.

[0054] During the working process of this embodiment, Figure 1 As shown, when the voltage controller body 4 is installed and working, the driving part 30 is started to make the electromagnetic shielding cover 2 move to a suitable position along with the moving part 31, and the electromagnetic radiation of the voltage controller body 4 will be absorbed by the electromagnetic shielding cover 2 and the cabinet body 1, while the heat of the voltage controller body 4 is transferred to the outside of the first heat dissipation hole 11 through the ventilation channel 21.

[0055] In a specific application scenario, when the heat dissipation effect needs to be improved, the electromagnetic shielding cover 2 is moved closer to the first heat dissipation hole 11 to increase the electromagnetic shielding space 20. The heat of the voltage controller body 4 is radiated and dissipated more fully in the electromagnetic shielding space 20, and the heat dissipation effect is good. Since the electromagnetic shielding cover 2 is always located between the heat dissipation hole and the preset installation position 10, the electromagnetic radiation of the voltage controller body 4 can be absorbed by the electromagnetic shielding cover 2 and the cabinet body 1, thereby improving the heat dissipation effect while taking into account the electromagnetic shielding effect.

[0056] In another specific application scenario, when it is necessary to improve the electromagnetic shielding effect, the electromagnetic shielding cover 2 is moved away from the first heat dissipation hole 11 to reduce the electromagnetic shielding space 20. The number of reflections of the electromagnetic radiation of the voltage controller body 4 in the electromagnetic shielding space 20 increases, thereby improving the absorption efficiency of the electromagnetic shielding cover 2 and the cabinet body 1. Since the electromagnetic shielding space 20 is connected to the first heat dissipation hole 11 through the ventilation channel 21, the heat of the voltage controller body 4 can be dissipated outward through the ventilation channel 21, thereby improving the electromagnetic shielding effect while taking into account the heat dissipation effect.

[0057] It can be seen from the above working process and application scenarios that the voltage controller body 4 will continue to generate heat and transmit electromagnetic radiation outward. The electromagnetic shielding cover 2 can flexibly adjust its position through the movement of the movable part 31, and flexibly adjust the electromagnetic shielding effect and the heat dissipation effect, so that the voltage control cabinet can take into account both the electromagnetic shielding effect and the heat dissipation effect, and better adapt to different voltage controllers and fluctuations under different working conditions.

[0058] Compared with the prior art, the advantages of this embodiment are: first, it has diverse functions, taking into account both the electromagnetic shielding function and the heat dissipation function, and can realize electromagnetic shielding and heat dissipation at the same time when the voltage controller body 4 is working, avoiding some prior arts that only have electromagnetic shielding function or only have heat dissipation function, which can only realize electromagnetic shielding or heat dissipation function and have single function; second, it can flexibly adjust the electromagnetic shielding effect and the heat dissipation effect, taking into account good heat dissipation and good electromagnetic shielding, and has strong adaptability, avoiding some prior arts that can realize the electromagnetic shielding function and heat dissipation function, but the electromagnetic shielding effect and heat dissipation effect are constant, and the electromagnetic shielding and heat dissipation cannot be flexibly adjusted.

[0059] In some specific embodiments, Figure 2 As shown, an achievable structure of the cabinet body 1 is further provided. The cabinet body 1 includes a cabinet door and a cabinet body. The cabinet door is hingedly connected to the front side of the cabinet body. During specific implementation, the cabinet door is flipped open to take out the voltage controller body 4 or maintain the equipment in the cabinet body 1.

[0060] In this embodiment, a handle is provided on the cabinet door, and the four corner edges of the bottom end of the cabinet body are fixedly connected with supporting feet, and a plurality of supporting feet can support the cabinet body 1.

[0061] In some specific embodiments, Figure 2 and Figure 4 As shown, an achievable structure of the first heat dissipation hole 11 is further provided. The first heat dissipation hole 11 is arranged adjacent to the top side of the cabinet body 1, and the preset installation position 10 is arranged adjacent to the bottom side of the cabinet body 1. The electromagnetic shielding cover 2 is located between the first heat dissipation hole 11 and the preset installation position 10, so that the ventilation channel 21 can be arranged vertically. In a specific implementation, the heat of the voltage controller body 4 on the preset installation position 10, combined with the characteristic of rising hot air, can be transferred upward to the first heat dissipation hole 11 in the vertical ventilation channel 21, thereby achieving a good heat dissipation effect.

[0062] In this embodiment, if Figure 4 As shown, multiple first heat dissipation holes 11 are arranged on opposite sides of the cabinet body 1, and multiple first heat dissipation holes 11 on the same side are arranged at regular intervals. The openings of the first heat dissipation holes 11 are all facing the preset installation position 10, that is, the opening axes of the first heat dissipation holes 11 are inclined toward the preset installation position 10, and the first heat dissipation holes 11 are rectangular holes.

[0063] In some specific embodiments, Figure 2 and Figure 4 As shown, in order to improve the effect of ventilation and heat dissipation, a second heat dissipation hole 12 that can be opened and closed is provided on the cabinet body 1, and the second heat dissipation hole 12 is provided on the ventilation channel 21, and the second heat dissipation hole 12 is connected to the ventilation channel 21. During specific implementation, the heat in the electromagnetic shielding space 20 is transferred outwardly through the ventilation channel 21. When it is necessary to improve the ventilation and heat dissipation, after the second heat dissipation hole 12 is opened, part of the heat can be transferred outwardly through the second heat dissipation hole 12, and the remaining part of the heat can be transferred outwardly through the first heat dissipation hole 11, thereby improving the effect of ventilation and heat dissipation. On the contrary, if there is no need to improve the ventilation and heat dissipation effect, the second heat dissipation hole 12 is closed.

[0064] In this embodiment, if Figure 2 , Figure 4 and Figure 5 As shown, two opening slots are provided on the outer wall surface of the cabinet body 1, and the two opening slots are provided on opposite sides in the width direction of the cabinet body 1, and a plurality of second heat dissipation holes 12 are provided in the opening slots; a cover plate 13 is flipably connected to the outer wall of the voltage control cabinet, and the cover plate 13 can flip over to cover the plurality of second heat dissipation holes 12; an electric telescopic rod 14 is connected to the inner side of the cover plate 13, and the electric telescopic rod 14 is used to drive the cover plate 13 to flip. In specific implementation, the second heat dissipation holes 12 can be opened and closed by flipping the cover plate 13. After the heat dissipation is completed, the second heat dissipation holes 12 can be closed, and because the second heat dissipation holes 12 are distributed, rather than centralized large openings 22, heat dissipation, electromagnetic shielding and dust prevention can be taken into account.

[0065] Based on the above embodiments, Figure 2 , Figure 4 and Figure 5 As shown, in order to further balance the ventilation and heat dissipation effects and the electromagnetic shielding effects, a rod through slot 15 is provided on the wall of the cabinet body 1, that is, a rod through slot 15 is provided on the opening slot, and a vertically arranged slide slot 130 is provided on the cover plate 13; one end of the electric telescopic rod 14 is installed on the moving part 31, and the other end of the electric telescopic rod 14 passes through the rod through slot 15 and is slidably installed in the slide slot 130. During implementation, the electric telescopic rod 14 can move with the moving part 31. When the electric telescopic rod 14 is located at the bottom of the slide slot 130, the flippable angle range of the cover plate 13 is small; when the electric telescopic rod 14 is located at the top of the slide slot 130, the flippable angle range of the cover plate 13 is relatively large, that is, the movement of the moving part 31 will increase or decrease the flippable angle range of the cover plate 13 to balance the ventilation and heat dissipation effects and the electromagnetic shielding effects.

[0066] In this embodiment, if Figures 2 to 5As shown, one end of the electric telescopic rod 14 adjacent to the lifting block 310 of the moving part 31 is rotatably connected to the first connecting seat 315, and the first connecting seat 315 is fixedly installed on the lifting block 310; one end of the electric telescopic rod 14 adjacent to the slide groove 130 is rotatably connected to the second connecting seat 316, and the second connecting seat 316 is fixedly connected to the T-block 317. The cross-section of the slide groove 130 is a T-slot, and the electric telescopic rod 14 and the slide groove 130 are slidably connected through the T-block 317 and the T-slot.

[0067] In a specific application scenario, when ventilation and heat dissipation are required but a higher electromagnetic shielding effect needs to be maintained, the movable part 31 can be kept stationary. At this time, the electromagnetic shielding cover 2 is stationary, and the electric telescopic rod 14 is started to telescope and open the cover 13, and the cover 13 is maintained at a smaller opening angle to achieve ventilation and heat dissipation and a higher electromagnetic shielding effect.

[0068] In another specific application scenario, when large-flow ventilation and heat dissipation is required, the moving part 31 can be started to move, driving the electromagnetic shielding cover 2 and the electric telescopic rod 14 to move toward the direction adjacent to the first heat dissipation hole 11. At this time, the electromagnetic shielding space 20 will become larger, and the electric telescopic rod 14 will be located at the top of the slide groove 130. At this time, the electric telescopic rod 14 is started to telescope and open the cover 13, and the cover 13 is maintained at a larger opening angle. The heat of the voltage controller body 4 can be dissipated outward as much as possible, maintaining a large-flow ventilation and heat dissipation effect.

[0069] In this embodiment, the preset installation position 10 is set at the bottom of the cabinet body 1; the ventilation channel 21 is arranged vertically; along the bottom of the cabinet body 1 to the top of the cabinet body 1, the second heat dissipation through hole 12 and the first heat dissipation through hole 11 are arranged in sequence. In specific implementation, the heat of the voltage controller body 4 can be transferred to the second heat dissipation through hole 12 and the first heat dissipation through hole 11 through the vertically arranged ventilation channel 21, combined with the characteristic of rising hot air, the heat dissipation effect is fully improved.

[0070] Based on the above embodiments, Figure 4As shown, the second heat dissipation through hole 12 is arranged on the same side as the first heat dissipation through hole 11, the aperture size of the second heat dissipation through hole 12 is smaller than the aperture size of the first heat dissipation through hole 11, and the hole density of the second heat dissipation through hole 12 is greater than the hole density of the first heat dissipation through hole 11. In specific implementation, the first heat dissipation through hole 11 with a large aperture serves as the main heat dissipation path, and most of the heat can be dissipated through the first heat dissipation through hole, while the second heat dissipation through hole with a small aperture and a high density serves as a secondary supplementary method of heat dissipation, so that the heat dissipation of the entire device is more flexible. For example, when the heat dissipation of the first heat dissipation through hole is close to the required target heat dissipation, but the target heat dissipation needs to be achieved more accurately, a secondary heat dissipation correction can be performed through the second heat dissipation through hole with a small aperture and a high density to achieve the target heat dissipation, thereby avoiding the problem that there is only one heat dissipation hole as in the prior art, and the heat dissipation size cannot be adjusted according to the current heat situation.

[0071] In some specific embodiments, Figure 2 and Figure 3 As shown, a feasible structure of the moving mechanism 3 is further provided, and the moving mechanism 3 includes a driving part 30 and a moving part 31, and the driving part 30 includes a driving motor 300 and a reciprocating screw rod 301; the driving motor 300 is transmission-connected to the reciprocating screw rod 301, and the axis direction of the reciprocating screw rod 301 is vertically arranged; the moving part 31 includes a lifting block 310 and a lifting frame 311; the lifting block 310 is slidably mounted on the reciprocating screw rod 301, and the lifting frame 311 is fixedly connected to the lifting block 310, and the lifting block 310 is also used to be fixedly connected to the electric telescopic rod 14, and the lifting frame 311 is fixedly connected to the lifting block 310. 11 is slidably connected to the cabinet body 1, and the lifting frame 311 is detachably connected to the electromagnetic shielding cover 2. During specific implementation, the driving motor 300 will drive the reciprocating screw 301 to rotate, and the rotation of the reciprocating screw 301 will drive the lifting block 310 and the lifting frame 311 to move up and down, thereby driving the electric telescopic rod 14 and the electromagnetic shielding cover 2 to move. In addition, the detachable connection mode of the electromagnetic shielding cover 2 is convenient for maintenance and simple and convenient replacement, which prevents the electromagnetic shielding cover 2 from aging in a high temperature environment for a long time. Compared with the non-detachable shielding structure of the prior art, the maintainability is low.

[0072] In this embodiment, if Figure 2 As shown, one end of the reciprocating screw 301 is drivingly connected to the output shaft of the driving motor 300, and the other end of the reciprocating screw 301 is movably mounted on the screw seat 314, and the screw seat 314 is fixedly connected to the inner wall of the cabinet body 1 to keep the reciprocating screw 301 arranged in a vertical direction.

[0073] In this embodiment, the moving mechanism 3 is arranged on one side of the length direction of the cabinet body 1, and a vertical support rod is provided on the other side of the length direction of the cabinet body 1. A lifting slider is slidably installed on the vertical support rod, and the lifting slider is fixedly connected to the lifting frame 311.

[0074] In this embodiment, if Figure 7 and Figure 8 As shown, a feasible structure for detachably connecting the electromagnetic shielding cover 2 is further provided, and the moving part 31 also includes a limit block 312 and a limit spring 313; a limit slot 3110 is provided in the lifting frame 311, and both sides of the outer wall of the electromagnetic shielding cover 2 are provided with a limit strip 23, and the limit strip 23 is installed in the limit slot 3110; one end of the limit slot 3110 is open, and the open end of the lifting frame 311 is provided with an arc-shaped through slot 3111, and the limit block 312 covers the open end of the lifting frame 311; a limit latch 312 is provided on one side of the limit block 312 adjacent to the limit slot 3110 120, the limit pin 3120 is inserted into the arc-shaped through groove 3111, and the limit pin 3120 and the end of the arc-shaped through groove 3111 compress the limit spring 313. During specific implementation, when the electromagnetic shielding cover 2 needs to be replaced, the limit block 312 can be rotated to open the open end of the lifting frame 311, and the limit strip 23 can slide in or out of the limit groove 3110, and finally the limit block 312 is released, and the limit spring 313 will reset the limit block 312, thereby completing the purpose of disassembling and assembling the electromagnetic shielding cover 2 and avoiding the aging of the electromagnetic shielding cover 2 accelerated by a long-term high temperature environment.

[0075] In this embodiment, the lifting frame 311 is made of insulating material to prevent the electromagnetic shielding cover 2 from conducting electricity into the lifting frame 311. The lifting frame 311 is a "U"-shaped frame, and a frame block is extended from the "U"-shaped frame. The inner wall of the cabinet body 1 is provided with a vertically arranged frame groove, and the frame block is slidably installed in the frame groove, thereby realizing a sliding connection between the lifting frame 311 and the cabinet body 1.

[0076] In this embodiment, if Figure 7 As shown, a plurality of grooves are formed at one end of the limiting block 312 away from the limiting groove 3110 , and the plurality of grooves can increase the friction force on the surface of the rotating limiting block 312 .

[0077] In some specific embodiments, Figure 2 and Figure 6 As shown, an achievable structure of the electromagnetic shielding cover 2 is further provided, and an opening 22 is provided on at least one side of the electromagnetic shielding cover 2, and the opening 22 is connected to both the ventilation channel 21 and the electromagnetic shielding space 20. In specific implementation, the heat in the electromagnetic shielding space 20 can be directly dissipated to the outside through the opening 22, and the ventilation channel 21 on one side of the opening 22 is shorter, and the heat can be transferred to the first heat dissipation hole 11 faster.

[0078] In this embodiment, if Figure 2 and Figure 6As shown, in the width direction of the cabinet body 1, openings 22 are provided on opposite sides of the electromagnetic shielding cover 2 so that the entire electromagnetic shielding cover 2 forms a "U"-shaped plate structure, and the ventilation channels 21 on both sides of the electromagnetic shielding space 20 are relatively short, and the heat in the electromagnetic shielding space 20 can be quickly transferred to the first heat dissipation through hole 11 from both sides.

[0079] In some possible embodiments, Figure 2 and Figure 6 As shown, openings 22 are provided on all sides of the electromagnetic shielding cover 2, and the electromagnetic shielding cover 2 forms a straight plate structure. The ventilation channels 21 on the peripheral sides of the electromagnetic shielding space 20 are relatively short, and the heat in the electromagnetic shielding space 20 can be quickly transferred from the peripheral sides to the first heat dissipation through holes 11. Under this structure, the ventilation and heat dissipation effects are optimal.

[0080] In this embodiment, the second heat dissipation hole 12 is located on the side of the electromagnetic shielding cover 2 without the opening 22, that is, the second heat dissipation hole 12 is located on the side of the electromagnetic shielding cover 2 with a side wall. The second heat dissipation hole 12 is connected to the ventilation channel 21, and the opening 22 is not directly connected to the second heat dissipation hole 12, which can achieve both heat dissipation and electromagnetic shielding effect.

[0081] In this embodiment, the material of the electromagnetic shielding cover 2 is conductive rubber, conductive plastic, or conductive metal material, which can effectively weaken the electric field strength, avoid the strong electromagnetic field affecting internal components, and improve the service life of the equipment. As long as the material can achieve electromagnetic shielding, it can be used as the material of the electromagnetic shielding cover 2, and technical personnel in this field can choose according to actual needs.

[0082] In some specific embodiments, Figure 2 As shown, a feasible structure of the ventilation channel 21 is further provided, and a ventilation channel 21 is formed in a gap between the outer peripheral side of the electromagnetic shielding cover 2 and the inner peripheral wall of the cabinet body 1, and the ventilation channel 21 is arranged around the outer peripheral side of the electromagnetic shielding cover 2, and one end of the ventilation channel 21 is connected to the electromagnetic shielding space 20, and the other end of the ventilation channel 21 is connected to the first heat dissipation through hole 11. In specific implementation, the ventilation channel 21 is not directly opened on the electromagnetic shielding cover 2, but is formed by the outer peripheral side of the electromagnetic shielding cover 2 and the inner peripheral wall of the cabinet body 1, which can ensure the electromagnetic shielding effect, and the ventilation channel 21 is arranged around the electromagnetic shielding cover 2, and the heat transfer efficiency is high.

[0083] Among them, as the electromagnetic shielding cover 2 moves, the position of the ventilation channel 21 will change accordingly. For example, if the electromagnetic shielding cover 2 moves toward the direction adjacent to the first heat dissipation hole 11, the electromagnetic shielding space 20 becomes larger, and the position of the ventilation channel 21 changes from the original position to a position closer to the first heat dissipation hole 11. Conversely, the position of the ventilation channel 21 changes from the original position to a position farther away from the first heat dissipation hole 11.

[0084] Based on the above embodiments, Figure 1 As shown, the following provides a voltage control device for protecting device testing, including: a voltage control cabinet; a voltage controller body 4, the voltage controller body 4 is arranged on a preset installation position 10, and in specific implementation, the voltage controller body 4 can be placed in the voltage control cabinet. Since the voltage control cabinet can adjust the heat dissipation effect and the electromagnetic shielding effect, it can adapt to different voltage controllers and fluctuations under different working conditions.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0086] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A voltage control cabinet for protector testing, characterized in that: include: A cabinet body, wherein a preset installation position for installing a voltage controller body is provided in the cabinet body, and a plurality of first heat dissipation through holes are provided on the cabinet body; An electromagnetic shielding cover, wherein the electromagnetic shielding cover is arranged between the preset installation position and the first heat dissipation through hole, the electromagnetic shielding cover and the cabinet body enclose an electromagnetic shielding space, a ventilation channel is left between the electromagnetic shielding cover and the cabinet body, and the ventilation channel is connected to the electromagnetic shielding space and the first heat dissipation through hole; The moving mechanism includes a driving part and a moving part, the driving part is connected to the moving part by transmission, the moving part is arranged inside the cabinet body, the electromagnetic shielding cover is installed on the moving part, and the transmission of the driving part is used to drive the electromagnetic shielding cover to move closer to or farther from the first heat dissipation hole to make the electromagnetic shielding space larger or smaller.

2. The voltage control cabinet according to claim 1, characterized in that: The cabinet body is provided with a second heat dissipation through hole which can be opened and closed. The second heat dissipation through hole is arranged on the ventilation passage, and the second heat dissipation through hole is communicated with the ventilation passage.

3. The voltage control cabinet according to claim 2, characterized in that: A plurality of second heat dissipation through holes are provided on the wall of the cabinet body; A cover plate is flipably connected to the outer wall of the voltage control cabinet, and the cover plate can flipably cover the plurality of the second heat dissipation through holes; An electric telescopic rod is connected to the inner side of the cover plate, and the electric telescopic rod is used to drive the cover plate to flip.

4. The voltage control cabinet according to claim 3, characterized in that: The wall of the cabinet body is provided with a rod through slot, and the cover plate is provided with a slide slot; The slotting axis of the rod-through slot and the slotting axis of the slide slot are in the same direction as the moving direction of the moving part; One end of the electric telescopic rod is installed on the moving part, and the other end of the electric telescopic rod passes through the rod through slot and is slidably installed in the slide slot.

5. The voltage control cabinet according to claim 2, characterized in that: At least one side of the electromagnetic shielding cover is provided with an opening, and the opening is connected to both the ventilation channel and the electromagnetic shielding space; The second heat dissipation through hole is not provided on the wall of the cabinet body adjacent to the opening.

6. The voltage control cabinet according to claim 2, characterized in that: The preset installation position is arranged at the bottom of the cabinet body; The ventilation channel is arranged vertically; The second heat dissipation through holes and the first heat dissipation through holes are arranged in sequence from the bottom of the cabinet body to the top of the cabinet body.

7. The voltage control cabinet according to claim 6, characterized in that: The driving part comprises a driving motor and a reciprocating screw rod; the driving motor is in transmission connection with the reciprocating screw rod, and the axis direction of the reciprocating screw rod is arranged vertically; The moving part includes a lifting block and a lifting frame; the lifting block is slidably installed on the reciprocating screw rod, the lifting frame is fixedly connected to the lifting block, the lifting block is also used to be fixedly connected to the electric telescopic rod, the lifting frame is slidably connected to the cabinet body, and the lifting frame is detachably connected to the electromagnetic shielding cover.

8. The voltage control cabinet according to claim 7, characterized in that: The moving part also includes a limit block and a limit spring; A limiting groove is provided in the lifting frame, and a limiting strip is provided on the outer wall of the electromagnetic shielding cover, and the limiting strip is installed in the limiting groove; One end of the limiting groove is open, the open end of the lifting frame is provided with an arc-shaped through groove, and the limiting block covers the open end of the lifting frame; A latch is provided on one side of the limiting block adjacent to the limiting groove, the latch is inserted into the arc-shaped through groove, and the limiting spring is compressed between the latch and the end of the arc-shaped through groove.

9. The voltage control cabinet according to claim 2, characterized in that: The aperture of the second heat dissipation through hole is smaller than the aperture of the first heat dissipation through hole, and the hole density of the second heat dissipation through hole is greater than the hole density of the first heat dissipation through hole.

10. A voltage control device for protector testing, characterized in that: include: The voltage control cabinet according to any one of claims 1 to 9; A voltage controller body is arranged on the preset installation position.

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