High-voltage switchgear

Abstract

The present invention belongs to the technical field of power switch cabinets, and particularly relates to a high-voltage switch cabinet. The high-voltage switch cabinet includes: an electrical box, which has an isolation chamber and a cable chamber formed inside. One side of the isolation chamber has an opening, and the cable chamber is provided with a lower door on the side corresponding to the side of the isolation chamber having the opening; a sealing cover, through which an isolation operating shaft and a grounding operating shaft are passed; an aviation plug, which is provided on the sealing cover for secondary wiring; an interlocking mechanism and an indicating board. The interlocking mechanism is provided on the side of the electrical box corresponding to the cable chamber and is linked with the lower door. The indicating board is respectively connected to the isolation operating shaft and the grounding operating shaft and forms a linkage structure. The operating mechanism is sealed inside the closed sealing cover, and the internal wiring is led out in the form of an aviation plug, which can play a role in waterproofing and dustproofing. The cabinet has good sealing performance, and at the same time realizes modular installation, which is convenient for wiring; the switch cabinet meets the requirements of five-prevention interlocking and complies with the safety operation procedures.

Description

Technical Field

[0001] The present invention belongs to the technical field of power switch cabinets, and particularly relates to a high-voltage switch cabinet. Background Art

[0002] High-voltage switch cabinets are commonly used equipment in the field of power distribution. Since high-voltage switch cabinets have a relatively high voltage during operation, there are great potential safety hazards to operators. Therefore, it is very important to improve the safety performance of high-voltage switch cabinets. For existing high-voltage switch cabinets, although some have five-prevention functions, their protection levels are relatively low, only reaching IP4X, and their sealing performance is difficult to meet the usage requirements. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-voltage switch cabinet, aiming to solve the technical problem of the relatively low protection level of high-voltage switch cabinets in the prior art.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a high-voltage switch cabinet, comprising:

[0005] An electrical box, which internally forms an isolation chamber and a cable chamber. One side of the isolation chamber has an opening, and the cable chamber is provided with a lower door on the side corresponding to the opening of the isolation chamber;

[0006] A sealing cover, which is hermetically connected to the opening of the isolation chamber, and the isolation operation shaft and the grounding operation shaft are passed through the sealing cover;

[0007] An aviation plug, which is arranged on the sealing cover for secondary wiring;

[0008] An interlocking mechanism and an indicating board. The interlocking mechanism is arranged on the side of the electrical box corresponding to the cable chamber and is linked with the lower door. The indicating board is respectively connected to the isolation operation shaft and the grounding operation shaft to form a linkage structure. When the isolation operation shaft rotates to the isolation position, the indicating board blocks the grounding operation shaft, and the interlocking mechanism locks the lower door to the electrical box. When the grounding operation shaft rotates to the grounding position, the indicating board blocks the isolation operation shaft, and the interlocking mechanism releases the lower door so that the lower door can be opened.

[0009] Further, a first sealing member and a second sealing member are respectively sleeved on the isolation operation shaft and the grounding operation shaft. The first sealing member and the second sealing member both include a sealing ring sleeved on the isolation operation shaft or the grounding operation shaft and a sealing ring pressing plate. The sealing ring pressing plate is fixedly connected to the inner wall of the sealing cover and presses the sealing ring against the inner wall of the sealing cover to seal the gap where the isolation operation shaft or the grounding operation shaft passes through the sealing cover.

[0010] Furthermore, the sealing cover is welded and fixed to the electrical box, an extension shell is connected to the side of the electrical box corresponding to the cable chamber, the lower door is movably mounted on the extension shell, the top surface of the extension shell is welded to the sealing cover and forms a mounting portion exposed relative to the sealing cover, and the interlocking mechanism is arranged on the mounting portion.

[0011] Furthermore, the interlocking mechanism includes an interlocking bracket, an interlocking plate and a push plate, the interlocking bracket is installed on the mounting portion, the interlocking plate and the push plate are both slidably connected to the interlocking bracket, and the interlocking plate drives the lower door to close when the push plate moves toward the inner side of the extension shell until it is separated from the interlocking plate.

[0012] Furthermore, the interlocking mechanism also includes a return spring, the two free ends of the return spring are respectively connected to the push plate and the interlocking plate, when the push plate moves toward the inner side of the extension shell until it is separated from the interlocking plate, the interlocking plate moves downward under the combined action of its own gravity and the elastic force of the return spring, thereby driving the lower door to move downward.

[0013] Furthermore, a plurality of guide rail grooves are provided on one side of the extension shell close to the lower door, a peripheral edge is provided on the peripheral side of the lower door, and a plurality of limit columns are provided on the inner wall of the peripheral edge. When the interlocking plate drives the lower door to move to a predetermined position, each limit column slides into the corresponding guide rail groove to close the lower door.

[0014] Furthermore, a first transmission plate is sleeved on the isolation operating shaft, a second transmission plate is sleeved on the grounding operating shaft, the indicator plate is fixed with a transmission plate via a connecting plate, the transmission plate is located between the indicator plate and the sealing cover, and there is a gap between the transmission plate and the indicator plate, the transmission plate is linked with the first transmission plate and the second transmission plate, when the isolation operating shaft drives the first transmission plate to rotate, the transmission plate can be driven to move downward, and when the grounding operating shaft drives the second transmission plate to rotate, the transmission plate can be driven to move upward.

[0015] Furthermore, a cam is sleeved on the grounding operating shaft, and when the cam rotates to the grounding position along with the grounding operating shaft, the indicator plate blocks the isolation operating shaft, the interlocking plate can move upward, and the lower door can be opened; when the cam rotates to the isolation position along with the grounding operating shaft, the indicator plate blocks the grounding operating shaft, the interlocking plate is supported by the cam, and the lower door cannot be opened.

[0016] Further, the isolation operating shaft is located directly above the grounding operating shaft. A first positioning notch adapted to the isolation operating shaft is formed on one side of the transmission plate, and a second positioning notch adapted to the grounding operating shaft is formed on the other side. When the transmission plate moves up and down, the isolation operating shaft slides along the first positioning notch, and the grounding operating shaft slides along the second positioning notch.

[0017] Further, both the first transmission piece and the second transmission piece are sector-shaped pieces with notches. A first bending edge is formed at one end of the transmission plate, and a second bending edge is formed at the other end. The first bending edge extends into the notch of the first transmission piece, and the second bending edge extends into the notch of the second transmission piece. The first transmission piece drives the transmission plate to move upward through the first bending edge, and the second transmission piece drives the transmission plate to move downward through the second bending edge.

[0018] Advantages of the present invention: In the high-voltage switch cabinet of the present invention, the operating mechanism is sealed inside a closed sealing cover, and the internal wiring is led out in the form of an aviation plug, which can play a role in waterproofing and dustproofing. The protection level of the cabinet can be improved to IP65. At the same time, modular installation is realized, which is convenient for wiring. The indicator board is linked with the isolation operating shaft and the grounding operating shaft, and the interlocking mechanism is linked with the lower door, realizing the interlocking operation between the disconnector, the grounding switch and the cabinet door, preventing misoperation, ensuring the safety of power workers, meeting the five-prevention interlocking requirements, conforming to the safety operation procedures, and the interlocking part is installed outside the cabinet, which is convenient for installation and maintenance. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the high-voltage switch cabinet provided by the embodiment of the present invention;

[0021] Figure 2 For Figure 1 The side view structural schematic diagram of the shown high-voltage switch cabinet;

[0022] Figure 3 For Figure 1 The explosion schematic diagram of the shown high-voltage switch cabinet;

[0023] Figure 4 For Figure 3 The enlarged schematic diagram of part A in

[0024] Figure 5 is Figure 1 a schematic three-dimensional structure diagram of the lower door;

[0025] Figure 6 is Figure 1 a schematic explosion diagram of the cover plate on the middle sealing cover;

[0026] Figure 7 is Figure 1 a partial structure schematic diagram of the high-voltage switchgear shown; Figure 1 ;

[0027] Figure 8 is Figure 1 a schematic three-dimensional structure diagram of the interlocking mechanism in the high-voltage switchgear shown;

[0028] Figure 9 is Figure 1 a schematic side view structure diagram of the interlocking mechanism in the high-voltage switchgear shown;

[0029] Figure 10 is Figure 1 a schematic explosion diagram of the interlocking mechanism in the high-voltage switchgear shown;

[0030] Figure 11 is Figure 1 a partial structure schematic diagram of the high-voltage switchgear shown; Figure 2 ;

[0031] Figure 12 is Figure 1 a partial enlarged schematic diagram of the high-voltage switchgear shown with the two rotating shafts in the initial position; Figure 1 ;

[0032] Figure 13 is Figure 1 a partial enlarged schematic diagram of the high-voltage switchgear shown with the two rotating shafts in the initial position; Figure 2 ;

[0033] Figure 14 is Figure 1 a partial enlarged schematic diagram of the high-voltage switchgear shown with the two rotating shafts in the initial position; Figure 3 ;

[0034] Figure 15 is Figure 1 a partial enlarged schematic diagram of the high-voltage switchgear shown when the grounding operation shaft rotates to the grounding position; Figure 1 ;

[0035] Figure 16 is Figure 1 a partial enlarged schematic diagram of the high-voltage switchgear shown when the grounding operation shaft rotates to the grounding position; Figure 2 ;

[0036] Figure 17 is Figure 1Partial enlarged schematic view when the isolation operation shaft of the shown high-voltage switchgear rotates to the isolation position Figure 1 ;

[0037] Figure 18 is Figure 1 Partial enlarged schematic view when the isolation operation shaft of the shown high-voltage switchgear rotates to the isolation position Figure 2 。

[0038] Among them, each reference numeral in the figure:

[0039] 10 - electrical box; 11 - extension shell; 12 - isolation operation shaft; 13 - grounding operation shaft; 20 - sealing cover; 30 - interlocking mechanism; 40 - indicator board; 110 - side plate; 120 - lower door; 121 - peripheral edge; 122 - guiding column; 123 - clamping plate; 130 - installation part; 140 - protection plate; 111 - positioning edge; 112 - guide rail groove; 21 - aviation plug; 22 - cover plate; 221 - sealing ring; 222 - sealing ring pressing plate; 223 - stud; 31 - interlocking bracket; 32 - interlocking plate; 33 - push plate; 34 - return spring; 310 - fixing plate; 311 - limiting hole; 312 - flanging; 313 - guiding column; 321 - guiding hole; 322 - clamping groove; 323 - limiting notch; 324 - first jack; 331 - sliding groove; 332 - anti - detachment hole; 333 - top - holding part; 334 - pushing part; 335 - second jack; 410 - transmission plate; 420 - connecting plate; 430 - pressing plate; 441 - first transmission piece; 442 - second transmission piece; 450 - cam; 411 - first bending edge; 412 - second bending edge; 413 - first positioning notch; 414 - second positioning notch. Specific embodiments

[0040] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless specifically defined otherwise.

[0043] In the present invention, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] As Figures 1 - 3 shown, the high-voltage switchgear provided by the embodiment of the present invention forms an instrument room and a cable room inside. The high-voltage switchgear includes an electrical box 10, a sealing cover 20, an aviation plug 21, an interlocking mechanism 30, and an indicating board 40. The electrical box 10 can be made of stainless steel. An isolation room and a cable room are formed inside the electrical box 10. One side of the isolation room has an opening, and a lower door 120 is provided on the side of the cable room corresponding to the opening of the isolation room; the sealing cover 20 is hermetically connected to the opening of the isolation room. The sealing cover 20 can be made of stainless steel and is fixed to the electrical box 10 by welding. The isolation operating shaft 12 and the grounding operating shaft 13 penetrate through the sealing cover 20, and the isolation operating shaft 12 and the grounding operating shaft 13 penetrate out from the side of the sealing cover 20, as Figure 1As shown in the figure, a cover plate 22 is provided on the right side of the sealing cover 20. The isolating operating shaft 12 and the grounding operating shaft 13 can rotate relative to the cover plate 22. The aviation plug 21 is provided on the sealing cover 20 for secondary wiring. The number of aviation plugs 21 can be set according to actual wiring requirements. The sealing cover 20 can form a step on the side close to the front end of the electrical box 10. The aviation plug 21 can be installed and fixed on this step. By adding the sealing cover 20 on one side of the electrical box 10 and providing the aviation plug 21 for secondary wiring on the sealing cover 20, the high-voltage switch cabinet has the functions of waterproof and airtightness, and has good sealing performance. The interlocking mechanism 30 is provided on the side of the electrical box 10 corresponding to the cable chamber and is linked with the lower door 120. The indicating board 40 is respectively connected to the isolating operating shaft 12 and the grounding operating shaft 13 to form a linkage structure. When the isolating operating shaft 12 rotates to the isolating position, the indicating board 40 blocks the grounding operating shaft 13, and the interlocking mechanism 30 locks the lower door 120 to the electrical box 10. When the grounding operating shaft 13 rotates to the grounding position, the indicating board 40 blocks the isolating operating shaft 12, and the interlocking mechanism 30 releases the lower door 120 so that the lower door 120 can be opened. The interlocking mechanism 30 is located outside the electrical box 10, which is convenient for installation and maintenance; the linkage structure formed by the indicating board 40 and the isolating operating shaft 12 and the grounding operating shaft 13, and the linkage between the interlocking mechanism 30 and the lower door 120 can meet the five-prevention interlocking requirements, making the operation safe and reliable.

[0045] For the high-voltage switch cabinet provided in this embodiment, the operating mechanism is sealed inside the closed sealing cover 20, and the internal wiring is led out in the form of the aviation plug 21, which can play a role in waterproofing and dustproofing. The protection level of the cabinet can be upgraded to IP65. At the same time, modular installation is realized, which is convenient for wiring; the linkage of the indicating board 40 with the isolating operating shaft 12 and the grounding operating shaft 13, and the linkage between the interlocking mechanism 30 and the lower door 120 realize the interlocking operation between the disconnector, the grounding switch and the cabinet door, prevent misoperation, ensure the safety of electric power personnel, meet the five-prevention interlocking requirements, comply with the safety operation procedures, and the interlocking part is installed outside the cabinet, which is convenient for installation and maintenance.

[0046] In one embodiment, as Figure 1 、 Figure 6As shown, a first seal and a second seal are respectively sleeved on the isolation operation shaft 12 and the grounding operation shaft 13. Both the first seal and the second seal include a sealing ring 221 and a sealing ring pressing plate 222 sleeved on the isolation operation shaft 12 or the grounding operation shaft 13. The sealing ring pressing plate 222 is fixedly connected to the inner wall of the sealing cover 20 and presses the sealing ring 221 against the inner wall of the sealing cover 20 to seal the gap where the isolation operation shaft 12 or the grounding operation shaft 13 penetrates through the sealing cover 20. A plurality of studs 223 are respectively welded to the inner wall of the cover plate 22 along the circumferential sides of the isolation operation shaft 12 and the grounding operation shaft 13. The sealing ring pressing plate 222 is inserted and fixed on each stud 223 and presses the sealing ring 221 against the inner wall of the cover plate 22. By providing the sealing ring 221 and the sealing ring pressing plate 222, while ensuring waterproofing, it also ensures that the isolation operation shaft 12 and the grounding operation shaft 13 can operate normally.

[0047] A positioning and installation structure may be provided between the sealing cover 20 and the cover plate 22. For example, a plurality of mounting posts are provided on one side of the sealing cover 20, and the cover plate 22 is correspondingly provided with a plurality of positioning holes. After the cover plate 22 is covered, waterproof rubber strips can be pasted around the cover plate 22 to prevent water from infiltrating. The operating mechanism is sealed inside the closed sealing cover 20, and the internal wiring is led out through the way of an aviation plug 21, which can play a role in waterproofing and dustproofing, and at the same time realizes modular installation and is convenient for wiring.

[0048] In one embodiment, as Figure 1 、 Figure 3 shown, the sealing cover 20 is welded and fixed to the electrical box 10. An extension shell 11 is connected to one side of the electrical box 10 corresponding to the cable chamber. The electrical box 10, the sealing cover 20 and the extension shell 11 together form a cabinet. The lower door 120 is movably installed on the extension shell 11. The top surface of the extension shell 11 is welded to the sealing cover 20 and forms an installation part 130 exposed relative to the sealing cover 20. The interlocking mechanism 30 is arranged in the installation part 130. The interlocking mechanism 30 is located below the two operation shafts. The installation part 130 is provided with an avoidance hole, so that the movable parts of the interlocking mechanism 30 can move in the avoidance hole.

[0049] In one embodiment, as Figure 7 、 Figure 8 shown, the interlocking mechanism 30 includes an interlocking bracket 31, an interlocking plate 32 and a push plate 33. The interlocking bracket 31 is installed on the electrical box 10, and specifically can be fixed to the installation part 130 of the extension shell 11. The interlocking plate 32 and the push plate 33 are both slidably connected to the interlocking bracket 31. When the push plate 33 moves backward until it disengages from the interlocking plate 32, the interlocking plate 32 drives the lower door 120 to close. At this time, the backward movement refers to the push plate 33 moving towards the inner side of the extension shell 11; when the interlocking plate 32 moves upward until it engages with the push plate 33, it drives the lower door 120 to move, so that the limit post of the lower door 120 disengages from the guide rail groove 112, and the lower door 120 can be opened.

[0050] In one embodiment, as shown in Figure 1 and Figures 3 - 5 shown, on one side of the extension shell 11 close to the lower door 120, a plurality of guide slots 112 are provided. A peripheral edge 121 is provided on the periphery of the lower door 120. The peripheral edges 121 on the left and right sides are respectively fitted and sleeved on the positioning edges 111 of the side plates 110. A plurality of guiding columns 122 are provided on the inner wall of the peripheral edge 121. When the interlocking plate 32 drives the lower door 120 to move to a predetermined position, the respective guiding columns 122 slide into the corresponding guide slots 112, so that the lower door 120 is closed. The extension shell 11 includes a top plate and two side plates 110. The sealing cover 20 is fixed to the top plate. A protective plate 140 is provided upward on one side of the top plate close to the lower door 120. The protective plate 140 can play a role in protecting the interlocking mechanism 30. The positioning edges 111 are respectively extended on the two side plates 110. A plurality of spaced guide slots 112 are symmetrically provided on each positioning edge 111. The guide slots 112 are special-shaped slots. The guide slots 112 include a horizontal section and a vertical section that are connected. The vertical section is located below the horizontal section. When the lower door 120 is pushed inward, the guiding column 122 first passes through the horizontal section and then slides into the vertical section, and is thus installed on the extension shell 11. The process of opening the lower door 120 is opposite.

[0051] In one embodiment, as shown in Figure 9 shown, the interlocking mechanism 30 further includes a return spring 34. The two free ends of the return spring 34 are respectively connected to the push plate 33 and the interlocking plate 32. When the push plate 33 moves backward to disengage from the interlocking plate 32, the interlocking plate 32 moves downward under the combined action of its own gravity and the elastic force of the return spring 34, thereby driving the lower door 120 to move downward, so that the lower door 120 is locked to the electrical box 10. At this time, the lower door 120 cannot be opened.

[0052] As shown in Figure 3 and Figures 8 - 10 shown, the interlocking bracket 31 includes a fixing plate 310 and a flanging 312. The fixing plate 310 is horizontally fixed to the installation part 130 of the extension shell 11 by screws. A limiting hole 311 is provided inside the fixing plate 310. The limiting hole 311 has an equal-diameter part and a variable-diameter part. The width of the equal-diameter part is adapted to the width of the interlocking plate 32. The interlocking plate 32 is vertically inserted into the equal-diameter part of the limiting hole 311. The width of the variable-diameter part gradually decreases from the direction close to the equal-diameter part to the direction away from the equal-diameter part. The width of the variable-diameter part on the side close to the equal-diameter part is equal to the width of the equal-diameter part. The length of the equal-diameter part is less than the length of the variable-diameter part. The flanging 312 is formed by folding upward from the limiting hole 311 inside the fixing plate 310. The flanging 312 is perpendicular to the fixing plate 310. Two guiding columns 313 are spaced apart at one end close to the top on the side of the flanging 312 facing the interlocking plate 32. The two guiding columns 313 are arranged at intervals in the vertical direction.

[0053] The interlocking plate 32 is vertically provided with a strip-shaped guiding hole 321. Two guiding columns 313 are slidably inserted into the guiding hole 321. One end of the interlocking plate 32 near the bottom is provided with a horizontally extending clamping groove 322. The opening of the clamping groove 322 faces the side of the lower door 120. The clamping groove 322 is of variable diameter, and the width of the clamping groove 322 gradually increases from the side away from the lower door 120 to the side close to the lower door 120. At a position near the top inside the lower door 120, a clamping plate 123 is horizontally extended and arranged. The clamping plate 123 is slidably inserted into the clamping groove 322 of the interlocking plate 32. In this way, when the interlocking plate 32 moves up and down, the lower door 120 is driven to move correspondingly by the cooperation of the clamping plate 123 and the clamping groove 322.

[0054] The push plate 33 is vertically arranged. One side of the push plate 33 is provided with a horizontally arranged sliding groove 331. The fixing plate 310 of the interlocking bracket 31 is slidably inserted into the sliding groove 331. The top of the push plate 33 is bent to form a horizontal holding part 333. One side of the push plate 33 is located between the flanging 312 and the interlocking plate 32. The push plate 33 is provided with an anti-detachment hole 332 at a position corresponding to the guiding column 313 at the top. One side of the push plate 33 close to the lower door 120 forms a pushing part 334 that abuts against the lower door 120. A limiting notch 323 is provided on the side of the interlocking plate 32 away from the lower door 120. When the interlocking plate 32 moves upward to a predetermined position, the interlocking plate 32 drives the lower door 120 to move upward, and the limiting columns of the lower door 120 are disengaged from the corresponding guide slots 112 on both sides of the extension shell 11. At this time, the lower door 120 can be opened. And during this process, the holding part 333 of the push plate 33 is always disengaged from the limiting notch 323 of the interlocking plate 32. A first insertion hole 324 is provided at a position of the guiding column 313 near the top of the interlocking plate 32. A second insertion hole 335 is provided at a position of the push plate 33 near the holding part 333. The return spring 34 is a torsion spring. The torsion spring includes a spiral body, a first torsion arm and a second torsion arm. The spiral body is sleeved on the guiding column 313 at the top. The two torsion arms are located on both sides of the spiral body. The two torsion springs are substantially parallel and staggered in space. The free end of the first torsion arm is hooked on the interlocking plate 32 through the first insertion hole 324, and the free end of the second torsion arm is hooked on the push plate 33 through the second insertion hole 335. When an external force pushes the pushing part 334 of the push plate 33 inward, the push plate 33 moves inward until the holding part 333 completely leaves the limiting notch 323 of the interlocking plate 32. Under the action of the return spring 34 and its own gravity, the interlocking plate 32 will move downward, and the lower door 120 will also move downward. Thus, the limiting columns on the lower door 120 will enter the corresponding guide slots 112 on both sides of the extension shell 11. At this time, the lower door 120 is closed and cannot be opened.

[0055] In one embodiment, as Figure 7 、 Figure 11 and Figure 14As shown, the isolation operation shaft 12 is sleeved with a first transmission plate 441, and the grounding operation shaft 13 is sleeved with a second transmission plate 442; the indicator plate 40 is fixed with a transmission plate 410 through a connecting plate 420, and the transmission plate 410 is located between the indicator plate 40 and the sealing cover 20, and the indicator plate 40 is arranged vertically, and the connecting plate 420 is perpendicular to the indicator plate 40 and the transmission plate 410 respectively, and the indicator plate 40, the connecting plate 420 and the transmission plate 410 can be set as a whole, or can be fastened by screws. There is a gap between the transmission plate 410 and the indicator plate 40, and there is a gap between the indicator plate 40 and the isolation operation shaft 12 and the grounding operation shaft 13. The transmission plate 410 is linked with the first transmission plate 441 and the second transmission plate 442. When the isolation operation shaft 12 drives the first transmission plate 441 to rotate, it can drive the transmission plate 410 to move downward, and when the grounding operation shaft 13 drives the second transmission plate 442 to rotate, it can drive the transmission plate 410 to move upward.

[0056] In one embodiment, if Figure 3 , Figure 7 and Figure 11 As shown, a cam 450 is sleeved on the grounding operating shaft 13, and the cam 450 is generally fan-shaped, with a relatively large diameter end and a small diameter end. When the cam 450 rotates to the grounding position along with the grounding operating shaft 13, the indicator plate 40 blocks the isolation operating shaft 12, the interlocking plate 32 can move upward, and the lower door 120 can be opened; when the cam 450 rotates to the isolation position along with the isolation operating shaft 12, the indicator plate 40 blocks the grounding operating shaft 13, the interlocking plate 32 is supported by the cam 450 and cannot move upward, and the lower door 120 cannot be opened.

[0057] In one embodiment, if Figure 7 , Figure 11 As shown, the isolation operating shaft 12 is located directly above the grounding operating shaft 13, a first positioning notch 413 adapted to the isolation operating shaft 12 is opened on one side of the transmission plate 410, and a second positioning notch 414 adapted to the grounding operating shaft 13 is opened on the other side, the first positioning notch 413 and the second positioning notch 414 are both opened vertically, the first positioning notch 413 is opened at the upper end of the transmission plate 410, and the second positioning notch 414 is opened at the lower end of the transmission plate 410, when the transmission plate 410 moves up and down, the isolation operating shaft 12 slides along the first positioning notch 413, and the grounding operating shaft 13 slides along the second positioning notch 414.

[0058] A pressure plate 430 is also provided between the indicator plate 40 and the transmission plate 410. The pressure plate 430 is provided with through holes corresponding to the positions of the isolation operating shaft 12 and the grounding operating shaft 13. The isolation operating shaft 12 and the grounding operating shaft 13 respectively pass through the through holes corresponding to the pressure plate 430. The pressure plate 430 plays an auxiliary positioning role, so that the transmission plate 410 remains parallel to the vertical direction during the up and down movement.

[0059] In one embodiment, ifFigure 11 , Figure 12 As shown in Figure 12 , both the first driving piece 441 and the second driving piece 442 are sector pieces. One end of the driving plate 410 forms a first bending edge 411, and the other end forms a second bending edge 412. The first bending edge 411 extends into the notch of the first driving piece 441, and the second bending edge 412 extends into the notch of the second driving piece 442. The first driving piece 441 drives the driving plate 410 to move upward through the first bending edge 411, and the second driving piece 442 drives the driving plate 410 to move downward through the second bending edge 412.

[0060] As Figures 12 - 14 shown in Figures 12 - 14 , the first driving piece 441 is a sector piece with a 90-degree notch, and the second driving piece 442 is a sector piece with a 180-degree notch. The first bending edge 411 and the second bending edge 412 are located on the diagonal side of the driving piece. When the isolation operating shaft 12 and the grounding operating shaft 13 are in the initial position, the notch of the first driving piece 441 faces obliquely upward to the right, the notch of the second driving piece 442 faces downward, the indicating plate 40 is in the middle position, the large-diameter end of the cam 450 faces downward and the small-diameter end faces upward. Both the isolation operating shaft 12 and the grounding operating shaft 13 are exposed outside the indicating plate 40. The large-diameter end of the cam 450 abuts against the interlocking plate 32, making the interlocking plate 32 unable to move upward, and the lower door 120 cannot be opened.

[0061] As Figure 15 , Figure 16 shown in Figure 15 and Figure 16 , when the grounding operating shaft 13 rotates counterclockwise to the grounding position to switch the switch to the grounded and closed state, the second driving piece 442 drives the driving plate 410 to move upward through the second bending edge. The indicating plate 40 blocks the upper isolation operating shaft 12, and at this time, the isolation operating shaft 12 cannot be operated. At the same time, the large-diameter end of the cam 450 rotates to the upward direction, and the interlocking plate 32 can move upward. At this time, the lower door 120 can be opened.

[0062] As Figure 17 , Figure 18 shown in Figure 17 and Figure 18 , when the isolation operating shaft 12 rotates clockwise to the isolation position, the first driving piece 441 drives the driving plate 410 to move downward through the first bending edge 411. The indicating plate 40 blocks the lower grounding operating shaft 13, and the grounding operating shaft 13 cannot be operated. At this time, the large-diameter end of the cam 450 rotates to the downward direction, and the interlocking plate 32 cannot move upward. Therefore, the lower door 120 cannot be opened.

[0063] This application solves the problem of the relatively low protection level of the high-voltage switchgear. The protection level can reach IP65. The provision of the aviation plug 21 on the sealing cover 20 can solve the problem of the lead-out of the internal wiring. The interlock of the switch is designed outside the sealing cover 20, which is convenient for installation and maintenance. At the same time, the interlock of the lower door 120 is realized by means of a mechanical hard interlock, and the design is safer and more reliable.

[0064] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-voltage switch cabinet, characterized in that: Comprising: An electrical box, inside which an isolation chamber and a cable chamber are formed. One side of the isolation chamber has an opening, and the cable chamber is provided with a lower door corresponding to the side of the isolation chamber where the opening is located; A sealing cover, sealingly connected to the opening of the isolation chamber, and an isolation operating shaft and a grounding operating shaft are passed through the sealing cover; An aviation plug, provided on the sealing cover for secondary wiring; An interlocking mechanism and an indicating board. The interlocking mechanism is provided on one side of the electrical box corresponding to the cable chamber and is linked with the lower door. The indicating board is respectively connected to the isolation operating shaft and the grounding operating shaft to form a linkage structure. When the isolation operating shaft rotates to the isolation position, the indicating board blocks the grounding operating shaft, and the interlocking mechanism locks the lower door to the electrical box. When the grounding operating shaft rotates to the grounding position, the indicating board blocks the isolation operating shaft, and the interlocking mechanism releases the lower door so that the lower door can be opened; A first sealing member is sleeved on the isolation operating shaft, and a second sealing member is sleeved on the grounding operating shaft; One side of the electrical box corresponding to the cable chamber is connected with an extension shell. The top surface of the extension shell is welded to the sealing cover and forms an installation part exposed relative to the sealing cover; The interlocking mechanism includes an interlocking bracket, an interlocking plate and a push plate. The interlocking bracket is installed on the installation part of the electrical box. The interlocking plate and the push plate are both slidably connected to the interlocking bracket. When the push plate moves towards the inner side of the extension shell and disengages from the interlocking plate, the interlocking plate drives the lower door to close.

2. The high-voltage switchgear according to claim 1, characterized in that: Both the first sealing member and the second sealing member include a sealing ring and a sealing ring pressing plate sleeved on the isolation operating shaft or the grounding operating shaft. The sealing ring pressing plate is fixedly connected to the inner wall of the sealing cover and presses the sealing ring against the inner wall of the sealing cover to seal the gap where the isolation operating shaft or the grounding operating shaft passes through the sealing cover.

3. The high-voltage switch cabinet according to claim 1, characterized in that: The sealing cover is fixedly welded to the electrical box, and the lower door is movably installed on the extension shell.

4. The high-voltage switchgear according to claim 3, wherein: The interlocking mechanism further includes a return spring. Two free ends of the return spring are respectively connected to the push plate and the interlocking plate. When the push plate moves towards the inner side of the extension shell and disengages from the interlocking plate, the interlocking plate moves downward under the combined action of its own gravity and the elastic force of the return spring, thereby driving the lower door to move downward.

5. The high-voltage switchgear according to claim 3, characterized in that: A plurality of guide rail grooves are formed on one side of the extension shell close to the lower door. A peripheral edge is provided on the periphery of the lower door, and a plurality of limit posts are provided on the inner wall of the peripheral edge. When the interlocking plate drives the lower door to move to a predetermined position, each of the limit posts slides into the corresponding one of the guide rail grooves to close the lower door.

6. The high-voltage switchgear according to claim 3, characterized in that: A first drive piece is sleeved on the isolation operation shaft, and a second drive piece is sleeved on the grounding operation shaft. The indicating plate is fixed with a drive plate through a connecting plate. The drive plate is located between the indicating plate and the sealing cover. There is a gap between the drive plate and the indicating plate. The drive plate is linked with the first drive piece and the second drive piece. When the isolation operation shaft drives the first drive piece to rotate, the drive plate can be driven to move downward. When the grounding operation shaft drives the second drive piece to rotate, the drive plate can be driven to move upward.

7. The high-voltage switchgear according to claim 6, characterized in that: A cam is sleeved on the grounding operation shaft. When the cam rotates with the grounding operation shaft to the grounding position, the indicating plate blocks the isolation operation shaft, the interlock plate can move upward, and the lower door can be opened. When the cam rotates with the grounding operation shaft to the isolation position, the indicating plate blocks the grounding operation shaft, and the interlock plate is held by the cam, and the lower door cannot be opened.

8. The high-voltage switchgear according to claim 6, wherein: The isolation operation shaft is located directly above the grounding operation shaft. A first positioning notch adapted to the isolation operation shaft is formed on one side of the drive plate, and a second positioning notch adapted to the grounding operation shaft is formed on the other side. When the drive plate moves up and down, the isolation operation shaft slides along the first positioning notch, and the grounding operation shaft slides along the second positioning notch.

9. The high-voltage switchgear according to claim 6, characterized in that: Both the first drive piece and the second drive piece are sector-shaped pieces with notches. A first bent edge is formed at one end of the drive plate, and a second bent edge is formed at the other end. The first bent edge extends into the notch of the first drive piece, and the second bent edge extends into the notch of the second drive piece. The first drive piece drives the drive plate to move upward through the first bent edge, and the second drive piece drives the drive plate to move downward through the second bent edge.

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