A metal clad high voltage switchgear

Abstract

The application relates to the technical field of switch cabinets, in particular to a metal armored high-voltage switch cabinet, which comprises an armored cabinet body, a placing plate fixedly connected to the inner wall of the armored cabinet body, a handcart arranged on one side of the placing plate in the armored cabinet body, and a power-on protection mechanism and a reinforced contact mechanism arranged between the handcart and the placing plate; the power-on protection mechanism comprises a fixed plate fixedly connected to one end of the outer side of the placing plate, elastic holes penetrating through the upper and lower ends of the fixed plate, clamping columns symmetrically arranged on the inner walls of the elastic holes, horizontal plates fixedly connected to the upper and lower sides of one end of the inner side of the handcart, and clamping grooves arranged on the mutually close ends of the two horizontal plates; the cabinet door can be prevented from being opened under the condition of power-on, so that electric arc generated when the moving contact and the static contact box are separated can be prevented, the electrical elements in the armored cabinet body are protected, the harm to the workers is prevented, and the safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of switch cabinet, especially to a metal armored high-voltage switch cabinet. BACKGROUND

[0002] Switch cabinet can be divided into open switch cabinet, metal enclosed switch cabinet and metal armored switch cabinet according to the different cabinet structure, and its main function is to open, control and protect the electrical equipment in the process of power generation, power transmission, power distribution and power conversion in the power system, and the metal armored high-voltage switch cabinet is a kind of metal enclosed switch equipment in which the main high-voltage electrical components (such as circuit breaker, disconnecting switch, grounding switch, transformer, busbar, etc.) are installed in the independent compartments separated by the grounded metal partition.

[0003] In the prior art, when the temperature of the high-voltage switch cabinet is too high and exceeds forty degrees, the interior of the high-voltage switch cabinet needs to be frequently overhauled, and the power supply needs to be turned off when the interior of the switch cabinet is overhauled. When the worker is in high temperature weather, fatigue will be accelerated, and continuous work in high temperature weather will cause the worker's attention to be more dispersed, so that the power supply is forgotten to be turned off during the overhaul. At this time, the moving contact and the static contact box are in the state of being electrified, so that when the worker opens the cabinet door to separate the moving contact and the static contact box, arc will appear. The arc not only breaks through the internal electrical components, but also causes the worker to be electrocuted, thereby causing harm to the worker's body and low safety.

[0004] Frequent maintenance needs to repeatedly separate or close the moving contact and the static contact box, and frequent separation and closure will cause wear to the moving contact and the static contact box, thereby causing poor contact between the moving contact and the static contact box, so that the contact resistance is abnormally increased, thereby affecting the subsequent use. SUMMARY

[0005] The purpose of the present application is to solve the problems in the background art, and a metal armored high-voltage switch cabinet is provided.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a metal armored high-voltage switch cabinet, comprising an armored cabinet body, a placing plate is fixedly connected on the inner wall of the armored cabinet body, a handcart is arranged on the side of the armored cabinet body corresponding to the placing plate, and a power protection mechanism and a reinforced contact mechanism are arranged between the handcart and the placing plate.

[0007] The power-on protection mechanism comprises a fixed plate fixedly connected to one end of the placement plate outside, elastic holes are provided on the upper and lower ends of the fixed plate, clamping columns are symmetrically arranged on the inner wall of the elastic holes, the mechanism further comprises horizontal plates fixedly connected to the upper and lower sides of one end of the handcart, clamping grooves are formed in the ends of the two horizontal plates close to each other, and the clamping columns are clamped in the clamping grooves to limit the handcart.

[0008] The power-on protection mechanism further comprises a communication groove in communication with the elastic hole, an extrusion column is arranged on the inner wall of the communication groove, a permanent magnet is fixedly connected to the end of the extrusion column away from the clamping column, an electromagnet is fixedly connected to the side of the inner wall of the communication groove away from the permanent magnet, the electromagnet and the permanent magnet repel each other in magnetism, push the extrusion column to move and clamp between the clamping columns, and prevent the handcart from being pulled out under the condition of power-on.

[0009] Preferably, the power-on protection mechanism further comprises first sliding grooves symmetrically formed on one side of the inner wall of the elastic hole, first sliding blocks are slidably connected to the inner walls of the two first sliding grooves, first springs are fixedly connected between the two groups of first sliding blocks and the first sliding grooves, and the two first sliding blocks and the two clamping columns are fixedly connected, respectively.

[0010] Preferably, the power-on protection mechanism further comprises second sliding grooves fixedly connected to the upper and lower sides of the inner wall of the communication groove, second sliding blocks are slidably connected to the inner walls of the two second sliding grooves, second springs are fixedly connected between the two groups of second sliding blocks and the second sliding grooves, and the two second sliding blocks are fixedly connected to the extrusion column.

[0011] Preferably, a static contact box is fixedly and penetratively arranged on the placement plate, the number of the static contact boxes is four and the static contact boxes are symmetrically distributed about the center line of the placement plate, dynamic contacts are arranged on the inner walls of the two groups of static contact boxes, touch arms are fixedly connected to one end of the two groups of dynamic contacts, and the two touch arms are fixedly connected to the handcart.

[0012] Preferably, the reinforced contact mechanism comprises connecting plates fixedly connected between the two groups of static contact boxes, square notches are formed in the two connecting plates, guide holes are provided on the upper and lower ends of the two square notches, annular grooves are formed in the inner walls of the two groups of static contact boxes, and each guide hole and each annular groove are in communication, respectively.

[0013] Preferably, connecting columns are arranged on the inner walls of the two groups of guide holes, arc-shaped contact plates are fixedly connected to the ends of the two groups of connecting columns away from each other, third sliding grooves are formed in one side of the inner wall of each group of guide holes, third sliding blocks are slidably connected to the inner walls of the two groups of third sliding grooves, third springs are fixedly connected between each group of third sliding blocks and the third sliding grooves, and each third sliding block and each connecting column are fixedly connected, respectively.

[0014] Preferably, the two groups of connecting columns are provided with square grooves at one end close to each other, the inner walls of the two groups of square grooves are slidably connected with adjusting columns, and the fourth springs are fixedly connected between the adjusting columns and the square grooves.

[0015] Preferably, the fixing plate is provided with rectangular holes at both ends of the side surface, the extruding columns are fixedly connected with connecting rods at both ends of the side surface, the two connecting rods are arranged in the inner walls of the two rectangular holes respectively, and the extruding plates are fixedly connected with the other ends of the two connecting rods.

[0016] Preferably, the inner wall of the armored cabinet body is provided with guide grooves at the outer side of the bottom corresponding to the placing plate, the inner walls of the two guide grooves are provided with two rollers, the two groups of rollers are fixedly connected with the handcart, and the handcart is detachably connected with the cabinet door at one end of the outer side.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] The energization protection mechanism can make the electromagnet generate a magnetic repulsion with the permanent magnet under energization, so that the extruding column moves and the clamping column is clamped into the clamping groove, thereby limiting and fixing the handcart, and the handcart and the cabinet door are detachably connected, so that the cabinet door cannot be opened under energization, thereby preventing the electric arc from being generated when the moving contact and the stationary contact box are separated, protecting the electrical elements inside the armored cabinet body, preventing harm to the workers, and improving the overall safety.

[0019] The reinforcing contact mechanism can move with the connecting rod and the extruding plate when the power is closed, so that the connecting column moves in the direction away from each other, and the arc-shaped contact plate is in close contact with the moving contact, avoiding poor contact and preventing the contact resistance from abnormally increasing, which can be the loss when the current passes through, avoiding affecting the subsequent use.

[0020] When the third spring is elastically reset during the separation process, the third sliding block can move in the direction close to each other, so that the connecting column moves in the direction close to each other, so that the arc-shaped contact plate is accommodated in the annular groove, avoiding wear of the arc-shaped contact plate during the separation and plugging process, thereby prolonging the service life of the arc-shaped contact plate.

[0021] The linkage between the energization protection mechanism and the reinforcing contact mechanism can realize the safety linkage effect, the electrical performance optimization linkage effect, and the maintenance efficiency improvement, and can improve the tightness between the structures, ensuring the overall use effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is an overall structure schematic diagram of the metal armored high-voltage switch cabinet.

[0023] Figure 2 It is armored cabinet section view of a kind of metal armored high-voltage switch cabinet of the application;

[0024] Figure 3 It is partial structure separation diagram of a kind of metal armored high-voltage switch cabinet of the application;

[0025] Figure 4 It is fixed plate section view of a kind of metal armored high-voltage switch cabinet of the application;

[0026] Figure 5 It is the structure diagram of a kind of metal armored high-voltage switch cabinet of the application Figure 4 Enlarged view in A place;

[0027] Figure 6 It is rectangular hole structure diagram of a kind of metal armored high-voltage switch cabinet of the application;

[0028] Figure 7 It is another view structure diagram of a kind of metal armored high-voltage switch cabinet of the application placement plate;

[0029] Figure 8 It is static contact box section view of a kind of metal armored high-voltage switch cabinet of the application;

[0030] Figure 9 It is the structure diagram of a kind of metal armored high-voltage switch cabinet of the application Figure 8 Enlarged view in B place;

[0031] Figure 10 It is guiding hole structure diagram of a kind of metal armored high-voltage switch cabinet of the application;

[0032] Figure 11 It is connecting column section view of a kind of metal armored high-voltage switch cabinet of the application;

[0033] Figure 12 It is the structure diagram on cabinet door of a kind of metal armored high-voltage switch cabinet of the application.

[0034] In the figure: 1. armored cabinet; 2. cabinet door; 3. trolley; 4. contact arm; 5. moving contact; 6. roller; 7. guide groove; 8. placement plate; 9. static contact box; 10. connecting plate; 11. fixed plate; 12. cross plate; 13. card slot; 14. card column; 15. connecting rod; 16. extrusion plate; 17. first spring; 18. extrusion column; 19. first slide groove; 20. first slider; 21. telescopic hole; 22. permanent magnet; 23. connecting groove; 24. electromagnet; 25. second slide groove; 26. second slider; 27. second spring; 28. rectangular hole; 29. ​​annular groove; 30. arc contact plate; 31. connecting column; 32. third slide groove; 33. third spring; 34. third slider; 35. guide hole; 36. square groove; 37. adjusting column; 38. fourth spring. DETAILED DESCRIPTION

[0035] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0036] like Figures 1-12 The illustrated metal-clad high-voltage switchgear includes an armored cabinet 1, with a placement plate 8 fixedly connected to the inner wall of the armored cabinet 1. A trolley 3 is provided inside the armored cabinet 1 on one side corresponding to the placement plate 8. A power-on protection mechanism and a reinforced contact mechanism are provided between the trolley 3 and the placement plate 8. The power-on protection mechanism prevents the cabinet door 2 from opening when power is on, thereby preventing arcing between the moving contact 5 and the static contact box 9 when they are separated, thereby improving safety. The reinforced contact structure strengthens the contact when closed.

[0037] like Figure 3 、 Figure 4 、 Figure 5 As shown, the power-on protection mechanism includes a fixed plate 11 fixedly connected to one end of the outer side of the placement plate 8, with telescopic holes 21 formed at the upper and lower ends of the fixed plate 11, and clamping columns 14 symmetrically provided on both sides of the inner wall of the telescopic hole 21. It also includes a horizontal plate 12 fixedly connected to the upper and lower sides of one end of the inner side of the handcart 3, and the two horizontal plates 12 are each provided with a clamping groove 13 at one end close to each other, and the clamping column 14 is clamped in the clamping groove 13 to limit the handcart 3;

[0038] like Figure 5 As shown, the power-on protection mechanism also includes a connecting groove 23 connected to the telescopic hole 21, and an extrusion column 18 is provided on the inner wall of the connecting groove 23. The end of the extrusion column 18 away from the clamping column 14 is fixedly connected to the permanent magnet 22, and the side of the inner wall of the connecting groove 23 away from the permanent magnet 22 is fixedly connected to the electromagnet 24. The electromagnet 24 and the permanent magnet 22 magnetically repel each other and push the extrusion column 18 to move and get stuck between the clamping columns 14, preventing the trolley 3 from being pulled out when the power is on, avoiding the generation of an arc.

[0039] As shown in Figure 5 , the power-on protection mechanism further comprises first sliding grooves 19 symmetrically arranged on one side of the inner wall of the telescopic hole 21, the inner wall of each of the two first sliding grooves 19 is slidingly connected with a first sliding block 20, the first spring 17 is fixedly connected between the two groups of first sliding blocks 20 and the first sliding grooves 19, and the two first sliding blocks 20 and the two clamping columns 14 are fixedly connected. When the power is off, the first sliding block 20 can be reset by the elastic reset action of the first spring 17 when the clamping column 14 is released from the limiting, so as to reset the clamping column 14, and the clamping column 14 can be limited by the cooperation of the first sliding block 20 and the first sliding groove 19, and a part of the inclined surface on the clamping column 14 can be placed in the telescopic hole 21.

[0040] As shown in Figure 5 , the power-on protection mechanism further comprises second sliding grooves 25 fixedly connected to the upper and lower inner walls of the communication groove 23, the inner wall of each of the two second sliding grooves 25 is slidingly connected with a second sliding block 26, the second spring 27 is fixedly connected between the two groups of second sliding blocks 26 and the second sliding grooves 25, and the two second sliding blocks 26 are fixedly connected with the extrusion column 18. When the power is off, the second sliding block 26 can be reset by the reset elastic action of the second spring 27, so as to reset the extrusion column 18.

[0041] As shown in Figure 2 , Figure 3 , the static contact box 9 is fixedly penetrated on the placement plate 8, the number of the static contact box 9 is four and is symmetrically distributed about the center line of the placement plate 8, the inner wall of each of the two static contact boxes 9 is provided with a movable contact 5, one end of each of the two groups of movable contacts 5 is fixedly connected with a contact arm 4, and the two contact arms 4 are fixedly connected with the handcart 3. The connection is completed by the static contact box 9 and the movable contact 5, and the contact arm 4 and the handcart 3 are fixedly connected to become an integral whole.

[0042] As shown in Figure 3 , Figure 7 , Figure 8 , Figure 10 , the reinforced contact mechanism comprises a connecting plate 10 fixedly connected between the two groups of static contact boxes 9, the two connecting plates 10 are both provided with square notches, the upper and lower ends of the two square notches are both provided with guide holes 35, the inner wall of each of the two groups of static contact boxes 9 is provided with an annular groove 29, and each guide hole 35 and each annular groove 29 are connected in communication. The guide hole 35 and the annular groove 29 are connected in communication to facilitate subsequent reinforcement operation.

[0043] As shown in Figure 8 , Figure 9As shown, the inner wall of the two sets of guide holes 35 is provided with a connecting column 31, and the distal ends of the two sets of connecting columns 31 are fixedly connected with arc-shaped contact plates 30. One side of the inner wall of each set of guide holes 35 is provided with a third sliding groove 32, and the inner walls of the two sets of third sliding grooves 32 are slidably connected with third sliding blocks 34. The third sliding blocks 34 and the third sliding grooves 32 are fixedly connected with third springs 33, and each third sliding block 34 and each connecting column 31 are fixedly connected. The connecting column 31 can push the arc-shaped contact plate 30 to move and make the arc-shaped contact plate 30 and the moving contact 5 tightly contact, ensuring the connection effect and improving the use effect. The third sliding groove 32 and the third sliding block 34 can limit the connecting column 31, so that the arc-shaped contact plate 30 can be retracted in the annular groove 29, avoiding blocking the moving contact 5 during the plug-in process, thereby ensuring the subsequent connection effect.

[0044] As shown in Figure 11 , the distal ends of the two sets of connecting columns 31 are provided with square grooves 36, and the inner walls of the two sets of square grooves 36 are slidably connected with adjusting columns 37. The adjusting columns 37 and the square grooves 36 are fixedly connected with fourth springs 38. The fourth spring 38 can buffer when the adjusting column 37 is extruded, so that the extrusion plate 16 can pass through the adjusting column 37 and limit and fix the adjusting column 37.

[0045] As shown in Figure 6 , Figure 7 , the side surfaces of the fixed plate 11 are provided with rectangular holes 28, and the side surfaces of the extrusion columns 18 are fixedly connected with connecting rods 15. The two connecting rods 15 are arranged in the inner walls of the two rectangular holes 28, and the other ends of the two connecting rods 15 are fixedly connected with extrusion plates 16. The rectangular hole 28 can move the connecting rod 15, and the extrusion column 18 can move with the connecting rod 15, so that the extrusion plate 16 can be moved to complete the strengthening contact process.

[0046] As shown in Figure 1 , Figure 2 , Figure 12 , the inner wall of the armored cabinet body 1 is provided with guide grooves 7 corresponding to the outer sides of the placing plates 8, and the inner walls of the two guide grooves 7 are provided with two rollers 6. The two sets of rollers 6 are fixedly connected with the handcart 3, and the outer side of one end of the handcart 3 is detachably connected with the cabinet door 2. The guide groove 7 and the roller 6 can limit the handcart 3, so that the moving contact 5 can be accurately inserted into the static contact box 9 to complete the plug-in operation.

[0047] Working principle: first when the armored cabinet 1 is powered on, because the electromagnet 24 and the permanent magnet 22 repel each other, the magnetic force between the electromagnet 24 and the permanent magnet 22 can push the extrusion column 18 to move towards the card column 14, so it will first contact the inclined surface on the card column 14 and extrude the card column 14 to move outward, so that the card column 14 is inserted into the card slot 13, so that the horizontal plate 12 and the handcart 3 can be limited and fixed, because the cabinet door 2 and the handcart 3 are detachably connected, so when forgetting to turn off the power, the cabinet door 2 cannot be opened, so the moving contact 5 and the static contact box 9 cannot be separated, thereby avoiding the generation of electric arc, and protecting the electrical elements inside the armored cabinet 1, and protecting the workers, improving safety;

[0048] When the extrusion column 18 moves, the connecting rod 15 will move synchronously, so the connecting rod 15 will move the extrusion plate 16 towards the connecting plate 10, and contact the inclined surface on the adjusting column 37, so that the adjusting column 37 moves away from each other, and the fourth spring 38 is extruded, at this time the elastic force generated by the compression of the fourth spring 38 will push the connecting column 31 to move away from each other, so that the arc-shaped contact plate 30 is in close contact with the moving contact 5, avoiding the situation that the moving contact 5 and the static contact box 9 are not in good contact due to multiple separation and closing, avoiding the situation that the contact resistance abnormally increases, facilitating subsequent use;

[0049] When the power is off, the electromagnet 24 will also be powered off, at this time the magnetic force of the electromagnet 24 is eliminated, at this time the elastic reset action of the second spring 27 can reset the second sliding block 26 and the extrusion column 18, and the extrusion column 18 releases the limiting of the card column 14, similarly the elastic reset action of the first spring 17 can reset the first sliding block 20 and the card column 14 and make the card column 14 leave the range of the card slot 13, release the limiting of the horizontal plate 12, at the same time it will move away from the connecting plate 10 with the connecting rod 15 and the extrusion plate 16, and release the limiting of the adjusting column 37, at this time the elastic reset of the fourth spring 38 can make the adjusting column 37 move towards each other, at the same time the elastic reset of the third spring 33 can make the connecting column 31 move towards each other, and reset the arc-shaped contact plate 30, avoiding the abrasion of the arc-shaped contact plate 30 during separation and closing, ensuring the tightness of subsequent contact.

[0050] The above shows and describes the basic principle, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, the above embodiments and descriptions in the specification are only the principles of the present application, without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, which fall within the scope of the present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A metal armored high-voltage switchgear, comprising an armored cabinet body (1), characterized in that: A placement plate (8) is fixedly connected to the inner wall of the armored cabinet (1), a trolley (3) is provided on one side of the armored cabinet (1) corresponding to the placement plate (8), and an electric protection mechanism and a contact reinforcement mechanism are provided between the trolley (3) and the placement plate (8); The power-on protection mechanism includes a fixed plate (11) fixedly connected to one end of the outer side of the placement plate (8), the fixed plate (11) is provided with telescopic holes (21) at the upper and lower ends, and the inner walls of the telescopic holes (21) are symmetrically provided with clamping columns (14), and also includes a transverse plate (12) fixedly connected to the upper and lower sides of one end of the inner side of the trolley (3), and the two transverse plates (12) are provided with a clamping groove (13) at one end close to each other, and the clamping column (14) is clamped in the clamping groove (13) to limit the position of the trolley (3); The power-on protection mechanism further comprises a connecting groove (23) connected to the telescopic hole (21), an inner wall of the connecting groove (23) is provided with an extrusion column (18), an end of the extrusion column (18) away from the clamping column (14) is fixedly connected to a permanent magnet (22), and an inner wall of the connecting groove (23) away from the permanent magnet (22) is fixedly connected to an electromagnet (24), the electromagnet (24) and the permanent magnet (22) magnetically repel each other and push the extrusion column (18) to move and be clamped between the clamping columns (14), thereby preventing the trolley (3) from being pulled out when power is on; The placement plate (8) is fixed with a static contact box (9), and the enhanced contact mechanism includes a connecting plate (10) fixedly connected between the two groups of static contact boxes (9). The two connecting plates (10) are each provided with a square notch, and the upper and lower ends of the two square notches are each provided with a guide hole (35). The inner walls of the two groups of guide holes (35) are provided with a connecting column (31), and the two groups of connecting columns (31) are fixedly connected to the arc contact plate (30) at one end away from each other. The two ends of the side of the extrusion column (18) are fixedly connected to the connecting rod (15), and the other ends of the two connecting rods (15) are fixedly connected to the extrusion plate (16). The two groups of connecting columns (31) are each provided with a square groove (36) at one end close to each other, and the inner walls of the two groups of square grooves (36) are both slidably connected to the adjustment column (37), and a fourth spring (38) is fixedly connected between each group of the adjustment column (37) and the square groove (36); The extrusion plate (16) moves toward the connecting plate (10) and contacts the inclined surface on the adjusting column (37), thereby causing the adjusting column (37) to move in a direction away from each other and to squeeze the fourth spring (38). At this time, the elastic force generated by the compression of the fourth spring (38) pushes the connecting column (31) to move in a direction away from each other.

2. The metal-clad high-voltage switchgear according to claim 1, characterized in that: The power-on protection mechanism further includes a first sliding groove (19) symmetrically arranged on one side of the inner wall of the telescopic hole (21), the inner walls of the two first sliding grooves (19) are both slidably connected with a first slider (20), a first spring (17) is fixedly connected between the two groups of the first sliders (20) and the first sliding grooves (19), and the two first sliders (20) are respectively fixedly connected to the two clamping columns (14).

3. The metal-clad high-voltage switchgear according to claim 2, characterized in that: The power-on protection mechanism further includes a second slide groove (25) fixedly connected to the upper and lower sides of the inner wall of the connecting groove (23), the inner walls of the two second slide grooves (25) are both slidably connected to a second slider (26), a second spring (27) is fixedly connected between the two groups of the second sliders (26) and the second slide grooves (25), and the two second sliders (26) are both fixedly connected to the extrusion column (18).

4. The metal-clad high-voltage switchgear according to claim 1, characterized in that: The number of the static contact boxes (9) is set to four and they are symmetrically distributed about the center line of the placement plate (8); the inner walls of the two groups of static contact boxes (9) are both provided with moving contacts (5); one end of the two groups of moving contacts (5) is fixedly connected to a contact arm (4); and the two contact arms (4) are both fixedly connected to the trolley (3).

5. The metal-clad high-voltage switchgear according to claim 4, characterized in that: An annular groove (29) is provided on the inner wall of the two groups of static contact boxes (9), and each guide hole (35) is communicated with each annular groove (29).

6. The metal-clad high-voltage switchgear according to claim 5, characterized in that: A third sliding groove (32) is provided on one side of the inner wall of each group of the guide holes (35), and a third slider (34) is slidably connected to the inner walls of the two groups of the third sliding grooves (32). A third spring (33) is fixedly connected between each group of the third slider (34) and the third sliding groove (32), and each third slider (34) is fixedly connected to each connecting column (31).

7. The metal-clad high-voltage switchgear according to claim 1, characterized in that: Rectangular holes (28) are provided at both ends of the side surface of the fixing plate (11), and the two connecting rods (15) are respectively arranged on the inner walls of the two rectangular holes (28).

8. The metal-clad high-voltage switchgear according to claim 1, characterized in that: The bottom of the inner wall of the armored cabinet (1) is symmetrically provided with guide grooves (7) on the outer side of the corresponding placement plate (8), and the inner walls of the two guide grooves (7) are each provided with two rollers (6). The two groups of rollers (6) are fixedly connected to the trolley (3), and one end of the outer side of the trolley (3) is detachably connected to the cabinet door (2).

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