High-voltage vacuum power distribution device with grounding switch

Abstract

The invention discloses a high-voltage vacuum power distribution device with a grounding switch. According to the technical scheme, the high-voltage circuit breaker is movably arranged in the main box body through a chassis truck, the box cover and the junction box are arranged on the two sides of the main box body respectively, and a three-phase input moving contact and a three-phase output moving contact are arranged at the front end of the high-voltage circuit breaker. One side of the main box body is provided with a static contact assembly matched with the moving contact, the static contact assembly comprises an insulating sleeve and a conductive assembly arranged on the insulating sleeve, the conductive assembly comprises a conductive rod, a static contact, a nut assembly and a grounding contact knife, and the conductive rod is arranged at the rear end of the insulating sleeve. The grounding switch has the advantages that the grounding contact knife is integrally formed in the static contact seat and can be very conveniently matched with the grounding switch, so that grounding is more convenient and safer, and meanwhile, the grounding switch is more reasonable in layout and small in occupied space.

Description

Technical Field

[0001] The present invention belongs to the field of high-voltage electrical equipment, and particularly relates to a high-voltage vacuum distribution device. Background Art

[0002] In the power supply system of coal mines, safe and reliable power distribution is a key factor in ensuring the normal production of mines and the safety of personnel. In traditional high-voltage distribution devices for coal mines, the key configuration of the grounding switch on the load side is usually not fully considered in the design. In the past, most distribution devices focused on the protection and control of the power supply side. For example, conventional relay protection devices were used to monitor abnormal current and voltage to prevent faults such as short circuits and overloads from impacting the upper-level power supply network. However, on the load side, once equipment needs to be repaired or there is an emergency power outage due to a sudden fault, due to the lack of a dedicated grounding switch, operators face a great risk of electric shock.

[0003] The environment in coal mines is harsh. Factors such as high humidity and high gas content make the insulation performance of electrical equipment vulnerable to influence. When a grounding fault occurs in the load-side line or equipment, if the faulty phase cannot be reliably connected to the ground in a timely and safe manner to release the residual charge, subsequent inspection and troubleshooting work cannot be carried out in a safe voltage environment. Moreover, the traditional distribution device has cumbersome steps in fault isolation and grounding operations, requiring manual operations such as complex power outage, voltage verification, and hanging grounding wires. This not only consumes a large amount of time but also easily causes secondary accidents due to human negligence, seriously restricting the safety and repair efficiency of power supply in coal mines and making it difficult to meet the requirements of high-efficiency and safe production of modern coal mines. Therefore, it is extremely urgent to develop a high-voltage vacuum distribution device with a grounding switch on the load side of coal mines that has good safety and stability and occupies less space. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-voltage vacuum distribution device with a grounding switch that has good safety and stability and occupies less space.

[0005] In order to solve the above problems, the technical solution adopted by the present invention includes: a main box, a high-voltage circuit breaker arranged in the main box and movable by a chassis vehicle, and a box cover and a junction box respectively arranged on both sides of the main box, the front end of the high-voltage circuit breaker is provided with a three-phase input and a three-phase output moving contact, one side of the main box is provided with a static contact assembly matched with the moving contact, the static contact assembly includes an insulating sleeve and a conductive assembly arranged on the insulating sleeve, the conductive assembly includes a conductive rod, a static contact, a nut assembly and a grounding contact knife, the conductive rod is arranged in the The rear end of the insulating sleeve and the tail portion thereof extend out of the insulating sleeve and are connected to the nut assembly; the static contact is arranged in the contact mounting cavity at the front end of the insulating sleeve and the rear end is connected to the conductive rod; the grounding contact blade is integrally formed in the insulating sleeve and comprises an integrally formed connection hole, a connection row and a blade-shaped grounding static contact; the connection hole is sleeved behind the wiring head at the front end of the conductive rod; the connection row is transversely connected to the connection hole and the blade-shaped grounding static contact; the blade-shaped grounding static contact is vertically fixed in the wiring slot at the lower end of the insulating sleeve; A grounding switch is provided at the bottom of the main box body corresponding to below the static contact assembly, and the grounding switch includes a frame, a grounding knife shaft arranged at the upper end of the frame, and a three-phase grounding knife movable contact piece arranged on the grounding knife shaft, and a first grounding switch crank arm is provided at one end of the grounding knife shaft; a grounding switch operating shaft is provided on one side of the main box body, and the grounding switch operating shaft is connected to the first grounding switch crank arm through a second grounding switch crank arm and a grounding switch pull rod.

[0006] The main box body is provided with an interlocking mechanism, and the interlocking mechanism includes an interlocking plate, an upper interlocking wheel sleeve, a lower interlocking wheel sleeve and an interlocking lock rod assembly. The interlocking plate is provided with a parallel sliding groove and a lock groove, and the end of the lock groove is provided with an unlocking hole. The operating shaft of the grounding switch is provided with a lock mouth that is locked with the lock groove. The upper interlocking wheel sleeve is connected to the circuit breaker transmission shaft. The interlocking lock rod assembly is arranged between the upper interlocking wheel sleeve and the lower interlocking wheel sleeve. The lower interlocking wheel sleeve is provided with a wheel sleeve transmission shaft and a connecting plate connected to the wheel sleeve transmission shaft and an interlocking pin arranged on the connecting plate. The end of the interlocking plate is provided with an interlocking long hole connected with the interlocking pin. The upper interlocking wheel sleeve is provided with a limiting opening, and the lower interlocking wheel sleeve is provided with a door lock rod clearance opening and an interlocking lock rod clearance opening; when the grounding switch is closed by rotating the grounding switch operating shaft, the lower interlocking wheel sleeve is synchronously driven to rotate, and the door lock rod clearance opening is aligned with the door lock rod on the main box body and the interlocking lock rod of the interlocking lock rod assembly is inserted into the limiting opening of the upper interlocking wheel sleeve; when the grounding switch is opened by rotating the grounding switch operating shaft, the lower interlocking wheel sleeve is synchronously driven to rotate, and the door lock rod clearance opening is away from the door lock rod on the main box body and the lower end of the interlocking lock rod of the interlocking lock rod assembly enters the interlocking lock rod clearance opening.

[0007] A connecting rod is rotatably connected to the lower end of the connecting plate. A locking rod that blocks the front end of the high-voltage circuit breaker is provided at the front end of the connecting rod, and first partition pull rods are provided corresponding to both ends of the locking rod. A partition crank arm is provided at the front end of the first partition pull rod. The front end of the partition crank arm is rotatably connected to a second partition pull rod, and the upper end is rotatably connected to a partition bracket. A partition for isolating the static contact is provided between the second partition pull rods.

[0008] The interlocking lock rod assembly includes a lock rod sleeve, an interlocking lock rod provided in the lock rod sleeve, and a return spring that drives the interlocking lock rod to move toward the lower interlocking wheel sleeve side. A limit bolt is provided on the lock rod sleeve, and an annular stroke limit groove that cooperates with the limit bolt is provided on the interlocking lock rod.

[0009] The rear end of the static contact is connected to the conductive rod through a flexible wire, and there is a movable gap between the static contact and the contact installation cavity. An insulating plug is fixed at the front end of the contact installation cavity, and a horn-shaped guiding hole that smoothly transitions with the jack of the static contact is provided at the center of the insulating plug.

[0010] A positioning groove with a diameter larger than the outer diameter of the static contact is provided at the rear end of the insulating sleeve. The front end of the static contact is movably arranged in the positioning groove.

[0011] A damping hole is provided at the rear end of the knife-shaped grounding static contact. When the grounding switch is closed, the edge of the grounding knife moving contact slides into the damping hole.

[0012] One end of the grounding knife shaft is connected to a driving motor through a speed change gear set at the other end, and the driving motor is placed in the frame.

[0013] The cross-section of the wiring groove is U-shaped, and a group of anti-tracking ribs are provided on the inner wall.

[0014] The grounding knife moving contact includes an upper grounding knife moving contact and a lower grounding knife moving contact. The lower grounding knife moving contact is fixed to the grounding knife shaft through a fixing sleeve, and a positioning sleeve is provided between the upper ends through a screw rod. The upper grounding knife moving contact is fixed to both sides of the upper end of the lower grounding knife moving contact, and a pair of disc springs and a pair of washer sleeves are respectively provided at both ends and the middle of the top through pan head screws.

[0015] The advantages of the high-voltage vacuum distribution device with a grounding switch of the present invention are as follows: 1. A grounding contact blade is integrally formed in the static contact seat, which can be very conveniently matched with the grounding switch, making grounding more convenient and safe. At the same time, the layout of the grounding switch is more reasonable, occupying less space; 2. The grounding switch and the protection system of the distribution body form an interlock. Only in a safe state where there is no voltage and current on the load side can the grounding knife switch be closed, preventing secondary accidents such as short circuits and electric shocks caused by misoperations, comprehensively improving the safety and stability of the power supply system in coal mines, and effectively meeting the requirements of modern coal mine safety production.

[0016] The present invention will be further described below with reference to the accompanying drawings of the specification. Description of the Drawings

[0017] Figure 1 is a cross-sectional view of the high-voltage vacuum distribution device of the present invention; Figure 2 is a partial cross-sectional view of the high-voltage vacuum distribution device of the present invention; Figure 3 is a cross-sectional view of the static contact assembly of the present invention; Figure 4 is a structural schematic diagram of the grounding contact blade of the present invention; Figure 5 is a structural schematic diagram of the grounding switch of the present invention; Figure 6 is a structural schematic diagram of the interlock mechanism of the present invention; Figure 7 is a structural schematic diagram of the interlock plate of the present invention; Figure 8 is a structural schematic diagram of the operating shaft of the grounding switch of the present invention; Figure 9 is a cross-sectional view of the interlock locking rod assembly of the present invention.

[0018] Among them: 1. Main box; 2. Chassis; 3. High-voltage circuit breaker; 4. Box cover; 5. Junction box 6. Moving contact; 7. Static contact assembly; 8. Insulation sleeve; 9. Conductive assembly; 10. Conductive rod; 11. Static contact; 12. Nut assembly; 13. Grounding contact knife; 14 Contact installation cavity; 15 Connection hole; 16. Connection row; 17. Knife-shaped grounding static contact 18. Wiring head; 19 Wiring slot; 20. Grounding switch; 21. Frame; 22. Grounding knife shaft; 23. Grounding knife moving contact piece; 24. First grounding switch crank arm; 25. Grounding switch operating shaft; 26. Second grounding switch crank arm; 27. Grounding switch pull rod; 28. Interlocking mechanism; 29. ​​Interlocking plate; 30. Upper interlocking wheel sleeve; 31. Lower interlocking wheel sleeve; 32. Interlocking lock rod assembly; 33. Parallel slide grooves; 34. Locking groove; 35. Unlocking hole; 36. Locking mouth; 37. Circuit breaker transmission shaft; 38. Wheel sleeve transmission shaft Moving shaft; 39, connecting plate; 40, interlocking pin; 41, interlocking long hole; 42, limiting opening; 43, door lock rod clearance opening; 44, interlocking lock rod clearance opening; 45, door lock rod; 46, interlocking lock rod; 47, connecting rod; 48 interlocking rod; 49, first partition rod; 50, partition arm; 51, second partition rod; 52, partition bracket; 53, partition; 54, lock rod sleeve; 55, reset spring; 56, limiting bolt; 57, Annular travel limit groove; 58, soft wire; 59, movable gap; 60, insulating plug; 61 trumpet-shaped guide hole; 62, positioning groove; 63, vibration reduction hole; 64, speed change gear set; 65 drive motor; 66, anti-creeping rib; 67, upper grounding knife moving contact piece; 68, lower grounding knife moving contact piece; 69, fixing sleeve; 70, screw; 71, positioning sleeve; 72, pan head screw needle; 73 disc spring; 74, gasket; 75, torsion part. DETAILED DESCRIPTION

[0019] Reference Figures 1-9 As shown, the high-voltage vacuum power distribution device with grounding switch of the present invention comprises a main box 1, a high-voltage circuit breaker 3 arranged in the main box 1 and movable by a chassis 2, and a box cover 4 and a junction box 5 respectively arranged on both sides of the main box 1. The front end of the high-voltage circuit breaker 3 is provided with a moving contact 6 for three-phase input and three-phase output, and one side of the main box 1 is provided with a stationary contact assembly 7 that cooperates with the moving contact 6. After the high-voltage circuit breaker 3 is moved forward into position by the chassis 2, the moving contact 6 is inserted into the stationary contact assembly 7 to close the circuit. The stationary contact assembly 7 comprises an insulating sleeve 8 and a conductive assembly 9 arranged on the insulating sleeve 8, and the conductive assembly 9 comprises a conductive rod 10, a stationary contact 11, a nut assembly 12 and a grounding contact blade 13. The conductive rod 10 is arranged at the rear end of the insulating sleeve 8, and the tail of the conductive rod 10 extends out of the insulating sleeve 8 and is connected to the nut assembly 12. The nut assembly 12 is used for wiring and fastening the grounding contact blade 13.

[0020] The static contact 11 is arranged in the contact mounting cavity 14 at the front end of the insulating sleeve 8, and the rear end of the static contact 11 is connected to the conductive rod 10. The grounding contact knife 13 is integrally formed within the insulating sleeve 8, and the grounding contact knife 13 includes a connection hole 15, a connection row 16, and a knife-shaped grounding static contact 17 that are integrally formed. The connection hole 15 is sleeved behind the connection head 18 at the front end of the conductive rod 10. The connection row 16 is horizontally connected to the connection hole 15 and the knife-shaped grounding static contact 17. The knife-shaped grounding static contact 17 is vertically fixed in the wiring groove 19 at the lower end of the insulating sleeve 8. Ideally, by twisting the connection row 16 and forming a twisting portion 75, the knife-shaped grounding static contact 17 is made vertical. Integrally forming the twisting portion 75 within the insulating sleeve 8 can increase the tensile force between the insulating sleeves 8, thereby further improving stability.

[0021] A grounding switch 20 is provided at the bottom of the main box body 1 corresponding to the lower part of the static contact assembly 7. The grounding switch 20 includes a frame 21, a grounding knife shaft 22 provided at the upper end of the frame 21, and three-phase grounding knife moving contacts 23 provided on the grounding knife shaft 22. The frame 21 is installed on the bottom plate of the main box body. One end of the grounding knife shaft 22 is provided with a first grounding switch crank arm 24. A grounding switch operating shaft 25 is provided on one side of the main box body 1. The grounding switch operating shaft 25 is connected to the first grounding switch crank arm 24 through a second grounding switch crank arm 26 and a grounding switch pull rod 27. By rotating the grounding switch operating shaft 25, manual opening and closing operations of the grounding switch 20 can be achieved. Since a metal bracket supporting the ground is provided at the bottom of the main box body, grounding can be achieved after the grounding switch 20 is closed.

[0022] Preferably, an interlocking mechanism 28 is provided on the main box body 1. The interlocking mechanism 28 includes an interlocking plate 29, an upper interlocking wheel sleeve 30, a lower interlocking wheel sleeve 31, and an interlocking lock rod assembly 32. The interlocking plate 29 is provided with a chute 33 and a lock groove 34 arranged in parallel. An unlocking hole 35 is provided at the end of the lock groove 34. The chute 33 cooperates with the upper sliding rod inside the main box body 1 so that the interlocking plate 29 can move horizontally. A lock port 36 that is locked and cooperated with the lock groove 34 is provided on the grounding switch operating shaft 25. The upper interlocking wheel sleeve 30 is connected to the circuit breaker drive shaft 37. The interlocking lock rod assembly 32 is arranged between the upper interlocking wheel sleeve 30 and the lower interlocking wheel sleeve 31. A wheel sleeve drive shaft 38, a connecting plate 39 connected to the wheel sleeve drive shaft 38, and an interlocking pin 40 provided on the connecting plate 39 are provided on the lower interlocking wheel sleeve 31. An interlocking long hole 41 connected to the interlocking pin 40 is provided at the end of the interlocking plate 29.

[0023] A limiting port 42 is provided on the upper interlocking wheel sleeve 30, and a door lock rod relief port 43 and an interlocking lock rod relief port 44 are provided on the lower interlocking wheel sleeve 31. The edge of the interlocking lock rod relief port 44 needs to be set as a smooth arc surface. When the earthing switch 20 is closed by rotating the earthing switch operating shaft 25, the lower interlocking wheel sleeve 31 is synchronously driven to rotate, and the door lock rod relief port 43 is aligned with the door lock rod 45 on the main box body 1, and the interlocking lock rod 46 of the interlocking lock rod assembly 32 is inserted into the limiting port 42 of the upper interlocking wheel sleeve 30. At this time, the high-voltage circuit breaker 3 is in the open state, and since the interlocking lock rod 46 is inserted into the limiting port 42 of the upper interlocking wheel sleeve 30, the high-voltage circuit breaker 3 cannot be closed, and only then can the door lock rod 45 be moved backward, and finally the box cover 4 can be opened. When the box cover 4 is in the open state, since the door lock rod 45 is inserted into the door lock rod relief port 43, the earthing switch operating shaft 25 cannot be opened at this time. Thus, safety is ensured. When the earthing switch 20 is opened by rotating the earthing switch operating shaft 25, the lower interlocking wheel sleeve 31 is synchronously driven to rotate, and the door lock rod relief port 43 is moved away from the door lock rod 45 on the main box body 1, and the lower end of the interlocking lock rod 46 of the interlocking lock rod assembly 32 enters the interlocking lock rod relief port 44, and only then can the high-voltage circuit breaker 3 be closed; similarly, since the limiting port 42 of the high-voltage circuit breaker 3 is away from the interlocking lock rod 46 when the high-voltage circuit breaker 3 is in the closed state, the interlocking lock rod 46 is locked, and the earthing switch 20 cannot be closed at this time, thus ensuring safety.

[0024] Preferably, a connecting rod 47 is rotatably connected to the lower end of the connecting plate 39. A locking rod 48 that blocks the front end of the high-voltage circuit breaker 3 is provided at the front end of the connecting rod 47. First partition pull rods 49 are provided corresponding to both ends of the locking rod 48. A partition crank arm 50 is provided at the front end of the first partition pull rod 49. The front end of the partition crank arm 50 is rotatably connected to a second partition pull rod 51. The upper end of the partition crank arm 50 is rotatably connected to a partition support 52. A partition 53 for isolating the static contact 11 is provided between the second partition pull rods 51. The partition support 52 is fixed to the main box body 1. When the high-voltage circuit breaker 3 moves forward to be connected to the static contact assembly 7, it drives the linkage of the locking rod 48, the connecting rod 47, the connecting plate 39 and the interlocking plate 29, causing the interlocking plate 29 to move forward, and further causing the locking groove 34 to be locked into the locking opening 36 of the earthing switch operating shaft 25, making the earthing switch operating shaft 25 inoperable, thereby preventing the closing operation of the earthing switch 20 in the energized state. At the same time, during the process of the locking rod 48 being pushed forward, it can drive the linkage of the first partition pull rod 49, the partition crank arm 50 and the partition 53, causing the partition 53 to move away from the static contact assembly 7, so that the moving contact 6 can be normally inserted into the static contact 11. Similarly, when the high-voltage circuit breaker 3 moves backward, and after the earthing switch operating shaft 25 performs a closing operation, it can drive the partition 53 to block the static contact 11 to ensure safety.

[0025] Preferably, the interlocking lock rod assembly 32 includes a lock rod sleeve 54, an interlocking lock rod 46 provided in the lock rod sleeve 54, and a return spring 55 that drives the interlocking lock rod 46 to move toward the lower interlocking wheel sleeve 31 side. A limit bolt 56 is provided on the lock rod sleeve 54. An annular stroke limit groove 57 that cooperates with the limit bolt 56 is provided on the interlocking lock rod 46. The above structure has the advantages of good structural stability and convenient assembly.

[0026] Preferably, the rear end of the static contact 11 is connected to the conductive rod 10 through a flexible wire 58, and there is a movable gap 59 between the static contact 11 and the contact mounting cavity 14. An insulating plug 60 is fixed to the front end of the contact mounting cavity 14. A horn-shaped guiding hole 61 that is smoothly transitioned with the insertion hole of the static contact 11 is provided at the center of the insulating plug 60. The static contact 11 can move freely, and when the moving contact 6 is inserted into the static contact 11, it can achieve self-alignment, thereby ensuring that there is no jamming phenomenon during insertion.

[0027] Preferably, a positioning groove 62 with a diameter larger than the outer diameter of the static contact 11 is provided at the rear end of the insulating sleeve 8. The front end of the static contact 11 is movably arranged in the positioning groove 62. The front end of the static contact 11 can move freely within the range defined by the positioning groove 62 to prevent excessive deviation, resulting in the moving contact 6 being unable to be aligned.

[0028] Preferably, a damping hole 63 is provided at the rear end of the knife-shaped static grounding contact 17. After the grounding switch 20 is closed, the edge of the moving contact piece 23 of the grounding knife slides into the damping hole 63. When the moving contact piece 23 of the grounding knife of the grounding switch 20 quickly closes with the moving contact piece 23 of the grounding knife, its pressure can be released through the damping hole 63 to reduce vibration.

[0029] Preferably, one end of the grounding knife shaft 22 is connected to a driving motor 65 through a speed-changing gear set 64 at the other end, and the driving motor 65 is placed inside the frame 21. The grounding switch 20 can be automatically switched on and off by driving the driving motor 65.

[0030] Preferably, the cross-section of the wiring groove 19 is U-shaped to semi-surround the knife-shaped static grounding contact 17 to isolate the knife-shaped static grounding contact 17, thereby improving safety. A group of anti-tracking ribs 66 are provided on the inner wall of the wiring groove 19 to play a role in anti-tracking and arc extinguishing, and at the same time improve strength.

[0031] Preferably, the moving contact piece 23 of the grounding knife includes an upper moving contact piece 67 of the grounding knife and a lower moving contact piece 68 of the grounding knife. The lower moving contact piece 68 of the grounding knife is fixed to the grounding knife shaft 22 through a fixing sleeve 69, and a positioning sleeve 71 is provided between the upper ends through a screw rod 70. The upper moving contact piece 67 of the grounding knife is fixed to both sides of the upper end of the lower moving contact piece 68 of the grounding knife, and a pair of disc springs 73 and a cushion sleeve 74 are respectively provided at both ends and in the middle of the top through pan head screws 72. With the above structure, the positioning of the moving contact piece 23 of the grounding knife is more accurate, and at the same time, the tension is better, and it can be closed with the knife-shaped static grounding contact 17 more tightly.

[0032] As mentioned above, it does not impose any formal restrictions on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments with the same changes within the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-voltage vacuum distribution device with a grounding switch, comprising a main box body (1), a high-voltage circuit breaker (3) movably arranged in the main box body (1) through a chassis truck (2), and a box cover (4) and a wiring box (5) respectively arranged on both sides of the main box body (1). A moving contact (6) with three-phase input and three-phase output is arranged at the front end of the high-voltage circuit breaker (3). A static contact assembly (7) cooperating with the moving contact (6) is arranged on one side of the main box body (1), characterized in that: The static contact assembly (7) includes an insulating sleeve (8) and a conductive assembly (9) provided in the insulating sleeve (8). The conductive assembly (9) includes a conductive rod (10), a static contact (11), a nut assembly (12), and a grounding contact blade (13). The conductive rod (10) is provided at the rear end of the insulating sleeve (8), and its tail extends out of the insulating sleeve (8) and is connected to the nut assembly (12). The static contact (11) is arranged in a contact installation cavity (14) at the front end of the insulating sleeve (8), and its rear end is connected to the conductive rod (10). The grounding contact blade (13) is integrally formed in the insulating sleeve (8), and includes an integrally formed connection hole (15), a connection row (16), and a blade-shaped grounding static contact (17). The connection hole (15) is sleeved behind a connection head (18) at the front end of the conductive rod (10). The connection row (16) is horizontally connected to the connection hole (15) and the blade-shaped grounding static contact (17). The blade-shaped grounding static contact (17) is vertically fixed in a wiring groove (19) at the lower end of the insulating sleeve (8). A grounding switch (20) is provided at the bottom of the main box body (1) corresponding to the lower part of the static contact assembly (7). The grounding switch (20) includes a frame (21), a grounding knife shaft (22) provided at the upper end of the frame (21), and three-phase grounding knife moving contacts (23) arranged on the grounding knife shaft (22). A first grounding switch crank arm (24) is provided at one end of the grounding knife shaft (22). A grounding switch operating shaft (25) is provided on one side of the main box body (1). The grounding switch operating shaft (25) is connected to the first grounding switch crank arm (24) through a second grounding switch crank arm (26) and a grounding switch pull rod (27).

2. The high-voltage vacuum power distribution device with a grounding switch according to claim 1, characterized in that: An interlocking mechanism (28) is provided on the main box body (1). The interlocking mechanism (28) includes an interlocking plate (29), an upper interlocking wheel sleeve (30), a lower interlocking wheel sleeve (31), and an interlocking lock rod assembly (32). Parallelly arranged sliding grooves (33) and lock grooves (34) are provided on the interlocking plate (29). An unlocking hole (35) is provided at the end of the lock groove (34). A lock port (36) that is lockingly engaged with the lock groove (34) is provided on the grounding switch operating shaft (25). The upper interlocking wheel sleeve (30) is connected to a circuit breaker drive shaft (37). The interlocking lock rod assembly (32) is arranged between the upper interlocking wheel sleeve (30) and the lower interlocking wheel sleeve (31). A wheel sleeve drive shaft (38), a connecting plate (39) connected to the wheel sleeve drive shaft (38), and an interlocking pin (40) provided on the connecting plate (39) are provided on the lower interlocking wheel sleeve (31). An interlocking long hole (41) connected to the interlocking pin (40) is provided at the end of the interlocking plate (29). A limiting port (42) is provided on the upper interlocking wheel sleeve (30), and a door lock rod relief port (43) and an interlocking lock rod relief port (44) are provided on the lower interlocking wheel sleeve (31); when the earthing switch (20) is closed by rotating the earthing switch operating shaft (25), the lower interlocking wheel sleeve (31) is synchronously driven to rotate, and the door lock rod relief port (43) is aligned with the door lock rod (45) on the main box body (1) and the interlocking lock rod (46) of the interlocking lock rod assembly (32) is inserted into the limiting port (42) of the upper interlocking wheel sleeve (30); when the earthing switch (20) is opened by rotating the earthing switch operating shaft (25), the lower interlocking wheel sleeve (31) is synchronously driven to rotate, and the door lock rod relief port (43) is moved away from the door lock rod (45) on the main box body (1) and the lower end of the interlocking lock rod (46) of the interlocking lock rod assembly (32) enters the interlocking lock rod relief port (44).

3. The high-voltage vacuum power distribution device with a grounding switch according to claim 2, characterized in that: A connecting rod (47) is rotatably connected to the lower end of the connecting plate (39). A locking rod (48) blocking the front end of the high-voltage circuit breaker (3) is provided at the front end of the connecting rod (47), and first partition pull rods (49) are provided corresponding to both ends of the locking rod (48). A partition crank arm (50) is provided at the front end of the first partition pull rod (49). The front end of the partition crank arm (50) is rotatably connected to a second partition pull rod (51), and the upper end is rotatably connected to a partition support (52). A partition (53) for isolating the static contact (11) is provided between the second partition pull rods (51).

4. The high-voltage vacuum power distribution device with a grounding switch according to claim 2, characterized in that: The interlocking lock rod assembly (32) includes a lock rod sleeve (54), an interlocking lock rod (46) provided in the lock rod sleeve (54), and a return spring (55) for driving the interlocking lock rod (46) to move towards the lower interlocking wheel sleeve (31). A limiting bolt (56) is provided on the lock rod sleeve (54), and an annular stroke limiting groove (57) cooperating with the limiting bolt (56) is provided on the interlocking lock rod (46).

5. The high-voltage vacuum power distribution device with a grounding switch according to claim 1, characterized in that: The rear end of the static contact (11) is connected to the conductive rod (10) through a flexible wire (58), and there is a movable gap (59) between the static contact (11) and the contact mounting cavity (14). An insulating plug (60) is fixed at the front end of the contact mounting cavity (14), and a horn-shaped guiding hole (61) smoothly transitioning with the insertion hole of the static contact (11) is provided at the center of the insulating plug (60).

6. The high-voltage vacuum power distribution device with a grounding switch according to claim 5, characterized in that: A positioning groove (62) with a diameter larger than the outer diameter of the static contact (11) is provided at the rear end of the insulating sleeve (8), and the front end of the static contact (11) is movably arranged in the positioning groove (62).

7. The high-voltage vacuum power distribution device with a grounding switch according to claim 1, characterized in that: A damping hole (63) is provided at the rear end of the knife-shaped earthing static contact (17). After the earthing switch (20) is closed, the edge of the earthing knife moving contact piece (23) slides into the damping hole (63).

8. The high-voltage vacuum power distribution device with a grounding switch according to claim 1, characterized in that: One end of the earthing knife shaft (22) is connected to a driving motor (65) through a speed-changing gear set (64) at the other end, and the driving motor (65) is placed in the frame (21).

9. The high-voltage vacuum power distribution device with a grounding switch according to claim 1, characterized in that: The cross-section of the wiring groove (19) is U-shaped, and a group of anti-tracking ribs (66) are provided on the inner wall.

10. The high-voltage vacuum power distribution device with a grounding switch according to claim 1, characterized in that: The grounding knife moving contact piece (23) includes an upper grounding knife moving contact piece (67) and a lower grounding knife moving contact piece (68). The lower grounding knife moving contact piece (68) is fixed to the grounding knife shaft (22) through a fixing sleeve (69), and a positioning sleeve (71) is provided between the upper ends through a screw (70). The upper grounding knife moving contact piece (67) is fixed to both sides of the upper end of the lower grounding knife moving contact piece (68), and two groups of disc springs (73) and spacer sleeves (74) are respectively provided at both ends and in the middle of the top through pan head screws (72).

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