Fast earthing device for high voltage switchgear

Abstract

This invention relates to the field of high-voltage switchgear technology, specifically to a rapid grounding device for high-voltage switchgear. The device includes a cabinet, a contact head, a T-shaped insulating base, and a contact rod. The contact rod is inserted through the side wall of the T-shaped insulating base. A wire is installed on the contact head. The device also includes a first insulating post and a second insulating post. The lower end of the first insulating post is fixedly connected to the upper end of the second insulating post. A rectangular groove is formed through the lower end of the second insulating post, and a recess is formed at the lower end of the first insulating post. The side wall of the contact rod fits against the inner wall of the recess, and a contact groove is formed at the upper end of the contact rod. The side wall of the contact head fits against the inner wall of the contact groove. This invention features a snap-fit ​​mechanism, where the upper end of the contact rod inside the T-shaped insulating base fits against the top of the recess. At this time, the side wall of the contact head is located within the contact groove, achieving grounding conductivity. Furthermore, the operation is rapid and does not require bolt connections.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear technology, and more specifically to a fast grounding device for high-voltage switchgear. Background Technology

[0002] High-voltage switchgear needs to be grounded during use, mainly to ensure the safety of high-voltage switchgear maintenance and to prevent damage to the high-voltage switchgear.

[0003] Currently, the grounding of high-voltage switchgear involves connecting a metal plate inside the cabinet via a wire, and then bolting this metal plate to a metal plate buried in the soil. This connection method has drawbacks in use:

[0004] 1. The grounding of the high-voltage switchgear requires bolt connection through two metal plates, which is troublesome to operate and cannot be grounded quickly. This is to avoid the bolts rusting when they are exposed to the outside for a long time, which would make it difficult to disassemble and replace the two metal plates later.

[0005] 2. When bolts are exposed to the outside environment for a long time, they are prone to rusting, which increases the resistance when conducting electricity between the two metal plates. This can easily lead to an increased risk of the cabinet casing becoming electrified and a decrease in system stability, seriously hindering the normal operation of the high-voltage switchgear. Summary of the Invention

[0006] The purpose of this invention is to solve the problems existing in the prior art by proposing a fast grounding device for high-voltage switchgear.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A fast grounding device for a high-voltage switchgear includes a cabinet, a contact head, a T-shaped insulating base, and a contact rod. The contact rod is inserted through the side wall of the T-shaped insulating base. A wire is installed on the contact head. The device also includes a first insulating post and a second insulating post. The lower end of the first insulating post is fixedly connected to the upper end of the second insulating post. A rectangular groove is formed through the lower end of the second insulating post. A groove is formed at the lower end of the first insulating post. The side wall of the contact rod fits against the inner wall of the groove. A contact groove is formed at the upper end of the contact rod. The side wall of the contact head fits against the inner wall of the contact groove.

[0009] The snap-fit ​​mechanism includes four slots formed on the side wall of the contact rod. The inner wall of each contact slot has four sliding grooves that correspond one-to-one with the four slots. An insulating plate is slidably connected to the inner wall of each of the four sliding grooves. The side wall of each insulating plate is elastically connected to the inner wall of its corresponding sliding groove through a first spring. Limiting strips are fixedly connected to the four inner corners of the rectangular groove. The outer wall of the T-shaped insulating base is in contact with the side walls of the four limiting strips.

[0010] The rectangular groove is equipped with a fixing mechanism for fixing the T-shaped insulating base.

[0011] Preferably, the fixing mechanism includes four annular bladders fixedly connected to the inner wall of the rectangular groove. The annular bladders are located between two adjacent limiting strips. The inner wall of the second insulating column has four strip-shaped cavities corresponding to the four annular bladders. The inner walls of the four strip-shaped cavities are all sealed and slidably connected to a sliding plate. The inner walls of the strip-shaped cavities are fixedly connected to multiple connecting pipes that communicate with the inner walls of the annular bladders. Coolant is provided in the sealed space formed by the side wall of the sliding plate near the connecting pipe and the inner wall of the strip-shaped cavity. Coolant is provided in all four annular bladders.

[0012] Preferably, the sidewall of the slide away from the connecting pipe is elastically connected to the inner wall of its corresponding strip cavity by multiple second springs. The four slide grooves correspond one-to-one with the four strip cavities. The inner walls of the slide grooves and their corresponding strip cavities are connected by a U-shaped rod that is sealed and slidably connected through them. One end of the U-shaped rod located in the slide groove is fixedly connected to the sidewall of the insulating plate, and the other end of the U-shaped rod located in the strip cavity is fixedly connected to the sidewall of the slide.

[0013] Preferably, the cabinet body is provided with a tensioning mechanism, which includes a fixed frame fixedly connected to the inner wall of the cabinet body. A winding roller is fixedly connected to the inner wall of the fixed frame by a bracket. The wire is wound on the winding roller. A movable plate is slidably connected to the inner wall of the fixed frame. A first ring is rotatably connected through the lower side wall of the movable plate. The first ring is sleeved on the winding roller, and the wire passes through the side wall of the first ring.

[0014] Preferably, a second ring is fixedly connected through the upper side wall of the movable plate, a first gear that can rotate is slidably connected to the side wall of the second ring, a second gear is fixedly connected to the side wall of the first ring, the first gear and the second gear mesh with each other, a rifle rod is fixedly connected to the inner wall of the fixed frame, and the side wall of the rifle rod is threadedly connected to the side wall of the first gear.

[0015] Preferably, a lead screw is rotatably connected to the upper part of the inner wall of the fixed frame, a slider is threadedly connected to the side wall of the lead screw, the lower end of the slider is fixedly connected to the upper end of the movable plate, one end of the lead screw passes through the inner wall of the fixed frame and is fixedly connected to a handwheel, and the side wall of the lead screw located outside the fixed frame is threaded, and a nut is connected to the threaded side wall.

[0016] Preferably, the fixed frame is provided with a driving mechanism, the driving mechanism including a liquid storage frame fixedly connected to the inner wall of the fixed frame, a driving plate being slidably connected to the inner wall of the liquid storage frame, hydraulic oil being provided in the liquid storage frame, the side wall of the driving plate being fixedly connected to the side wall of the moving plate through a rectangular rod, the inner wall of the liquid storage frame being fixedly connected to the inner wall of one of the strip cavities through a hose, and the inner walls of two adjacent strip cavities near the second spring being fixedly connected to an arc-shaped tube.

[0017] Preferably, a third ring is rotatably connected through the inner wall of the fixed frame, and a coating ring is fixedly connected to the inner wall of the third ring. The coating ring is hollow, and multiple liquid outlet holes are opened on the inner wall of the coating ring away from the third ring. A liquid inlet pipe is fixedly connected to the inner wall of the coating ring away from the liquid outlet holes. The liquid inlet pipe is connected to an external liquid pump, and the side wall of the wire is in contact with the inner wall of the coating ring.

[0018] Preferably, a first wheel is fixedly connected to the side wall of the lead screw, and a second wheel is fixedly connected to the side wall of the third ring located within the fixed frame. A synchronous belt connects the first wheel and the second wheel.

[0019] Compared with existing technologies, the advantages of this invention are:

[0020] 1. A snap-fit ​​mechanism is set up so that the upper end of the contact rod inside the T-shaped insulating base fits against the top of the groove. At this time, the side wall of the contact head is located in the contact groove, realizing the grounding and conduction function. The operation is quick and does not require bolt connection. This avoids the cumbersome operation, inability to quickly ground, and increased grounding resistance due to bolt rusting in the existing technology, which increases the risk of the cabinet shell becoming electrified and reduces system stability, seriously hindering the normal operation of the cabinet.

[0021] 2. A fixing mechanism is set up so that the upper end of the contact rod inside the T-shaped insulating base fits against the top of the groove. After the side wall of the contact head is located inside the contact groove, the side walls of the four annular bladders fit against the outer wall of the T-shaped insulating base, thus achieving complete wrapping of the outer wall of the T-shaped insulating base. This prevents external moisture from entering the rectangular groove and increasing the grounding resistance. At the same time, it can also stabilize the position of the T-shaped insulating base.

[0022] 3. Furthermore, each of the four annular bladders is equipped with coolant, which can absorb heat from the contact rod through the T-shaped insulating base, and also absorb heat from the contact head, preventing creep caused by thermal expansion of the contact rod and contact head, which would lead to thickening of the oxide film on the contact surface and form a vicious cycle.

[0023] 4. Set up a tensioning mechanism so that after grounding is completed, the exposed wires can be put into the fixed frame to prevent excessive exposure of the wires on the outer surface from corrosion and cracking. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the fast grounding device for high-voltage switchgear proposed in this invention;

[0025] Figure 2 for Figure 1 A structural diagram after the cabinets have been removed;

[0026] Figure 3 for Figure 2 A schematic diagram of the vertical sectional structure;

[0027] Figure 4 for Figure 2 A vertical cross-sectional view of the structure at the first and second insulating pillars.

[0028] Figure 5 for Figure 2 A partial vertical cross-sectional view of the first insulating post after the contact rod has been removed.

[0029] Figure 6 for Figure 2 A schematic diagram of the structure after the middle contact rod is separated from the insulating plate;

[0030] Figure 7 for Figure 3 Enlarged structural diagram at point A;

[0031] Figure 8 for Figure 2 A top sectional view of the central strip cavity;

[0032] Figure 9 for Figure 3 Enlarged structural diagram at point B;

[0033] Figure 10 lie in Figure 2 A schematic diagram of the internal components of the fixed frame.

[0034] In the diagram: 1. Cabinet; 2. Contact head; 3. T-shaped insulating base; 4. Contact rod; 5. Wire; 6. First insulating post; 7. Second insulating post; 8. Rectangular groove; 9. Groove; 10. Contact groove; 11. Limiting strip; 12. Slot; 13. Slide groove; 14. Insulating plate; 15. First spring; 16. Annular bladder; 17. Strip cavity; 18. Slide plate; 19. Second spring; 20. Connecting pipe; 21. U-shaped rod; 22. Fixed... 23. Fixed frame; 24. Winding roller; 25. Moving plate; 26. First ring; 27. Second ring; 28. First gear; 29. ​​Second gear; 30. Rifling rod; 31. Liquid storage frame; 32. Drive plate; 33. Rectangular rod; 34. Hose; 35. Arc tube; 36. Lead screw; 37. Slider; 38. Nut; 39. Third ring; 40. Liquid coating ring; 41. Liquid outlet; 42. Liquid inlet pipe; 43. First wheel; 44. Second wheel. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Reference Figures 1-10 The fast grounding device of the high voltage switchgear includes a cabinet 1, a contact head 2, a T-shaped insulating base 3 and a contact rod 4. The contact rod 4 is inserted through the side wall of the T-shaped insulating base 3, and a wire 5 is installed on the contact head 2.

[0037] Furthermore, the lower end of the contact rod 4 is inserted into the soil, and the wire 5 is electrically connected to the cabinet 1 and the controller and other equipment inside the cabinet 1. The current can be grounded through the contact head 2 and the contact rod 4 to protect the cabinet 1 and the controller and other equipment inside the cabinet 1.

[0038] It also includes a first insulating post 6 and a second insulating post 7. The lower end of the first insulating post 6 is fixedly connected to the upper end of the second insulating post 7. A rectangular groove 8 is formed through the lower end of the second insulating post 7, and a groove 9 is formed at the lower end of the first insulating post 6 (e.g., Figure 5 As shown), the side wall of the contact rod 4 fits against the inner wall of the groove 9, and a contact groove 10 is provided at the upper end of the contact rod 4 (as shown). Figure 6 As shown), the side wall of the contact head 2 is in contact with the inner wall of the contact groove 10.

[0039] The locking mechanism includes four slots 12 (e.g., on the side wall of the contact rod 4) Figure 6 As shown), the inner wall of the contact groove 10 has four sliding grooves 13 corresponding to the four slots 12. An insulating plate 14 is slidably connected to the inner wall of each of the four sliding grooves 13. The side walls of the insulating plates 14 are elastically connected to their corresponding inner walls of the sliding grooves 13 via first springs 15. Limiting strips 11 are fixedly connected to the four corners of the inner walls of the rectangular groove 8. The outer wall of the T-shaped insulating base 3 is in contact with the side walls of the four limiting strips 11 (as shown). Figure 8 (As shown).

[0040] During grounding, the operator holds the first insulating post 6, aligns the side wall of the T-shaped insulating base 3 with the side wall of the limiting strip 11, and inserts it into the rectangular groove 8. Then, the operator presses down on the first insulating post 6, causing the upper end of the contact rod 4 inside the T-shaped insulating base 3 to align with the top of the groove 9. At this time, the side wall of the contact head 2 is located inside the contact groove 10, achieving the grounding conductivity function. The operation is quick and does not require bolt connections, thus avoiding the operational difficulties, inability to quickly ground, and increased grounding resistance due to bolt rusting that could lead to increased risk of the cabinet 1's outer shell becoming electrified and decreased system stability that seriously hinder the normal operation of the cabinet 1.

[0041] The rectangular groove 8 is equipped with a fixing mechanism for fixing the T-shaped insulating base 3. The fixing mechanism includes four annular bladders 16 fixedly connected to the inner wall of the rectangular groove 8. The annular bladders 16 are located between two adjacent limiting strips 11. The inner wall of the second insulating column 7 has four strip-shaped cavities 17 corresponding to the four annular bladders 16. The inner walls of the four strip-shaped cavities 17 are all sealed and slidably connected with sliding plates 18. The inner walls of the strip-shaped cavities 17 are fixedly connected with multiple connecting pipes 20 that communicate with the inner walls of the annular bladders 16. The sealed space formed by the side wall of the sliding plate 18 near the connecting pipes 20 and the inner wall of the strip-shaped cavity 17 is filled with coolant. The four annular bladders 16 are all filled with coolant.

[0042] Furthermore, after the upper end of the contact rod 4 inside the T-shaped insulating base 3 is abutted against the top of the groove 9, and the sidewall of the contact head 2 is located inside the contact groove 10, the sidewalls of the four annular pouches 16 are all abutted against the outer sidewall of the T-shaped insulating base 3, achieving complete coverage of the outer sidewall of the T-shaped insulating base 3 (e.g., Figure 8 As shown in the figure, this prevents external moisture from entering the rectangular groove 8, increases the grounding resistance, and also stabilizes the position of the T-shaped insulating base 3.

[0043] Furthermore, each of the four annular bladders 16 is equipped with coolant, which can absorb the heat on the contact rod 4 through the T-shaped insulating base 3, and at the same time absorb the heat on the contact head 2, so as to avoid creep caused by thermal expansion on the contact rod 4 and the contact head 2, which would lead to thickening of the oxide film on the contact surface and form a vicious cycle.

[0044] The side wall of the slide plate 18 away from the connecting pipe 20 is elastically connected to the inner wall of its corresponding strip cavity 17 by multiple second springs 19. The four slide grooves 13 correspond one-to-one with the four strip cavities 17. The inner walls of the slide grooves 13 and their corresponding strip cavities 17 are connected by a U-shaped rod 21 through a sealed sliding connection. One end of the U-shaped rod 21 located in the slide groove 13 is fixedly connected to the side wall of the insulating plate 14, and the other end of the U-shaped rod 21 located in the strip cavity 17 is fixedly connected to the side wall of the slide plate 18.

[0045] The cabinet 1 is equipped with a tensioning mechanism, which includes a fixing frame 22 fixedly connected to the inner wall of the cabinet 1. A winding roller 23 is fixedly connected to the inner wall of the fixing frame 22 via a bracket. Figure 3 and Figure 10 As shown), the wire 5 is wound on the winding roller 23. A movable plate 24 is slidably connected to the inner wall of the fixed frame 22. A first ring 25 is rotatably connected through the lower side wall of the movable plate 24. The first ring 25 is sleeved on the winding roller 23, and the wire 5 passes through the side wall of the first ring 25.

[0046] A second ring 26 is fixedly connected through the upper side wall of the movable plate 24. A first gear 27 that can rotate is slidably connected to the side wall of the second ring 26. A second gear 28 is fixedly connected to the side wall of the first ring 25. The first gear 27 and the second gear 28 mesh with each other. A rifle rod 29 is fixedly connected to the inner wall of the fixed frame 22. The side wall of the rifle rod 29 is threadedly connected to the side wall of the first gear 27.

[0047] It should be noted that the rifle 29 is a large-lead multi-start threaded rod that can convert linear motion into helical motion, allowing the first gear 27 to rotate in both directions when it moves horizontally back and forth.

[0048] A lead screw 35 is rotatably connected to the upper part of the inner wall of the fixed frame 22. A slider 36 is threadedly connected to the side wall of the lead screw 35. The lower end of the slider 36 is fixedly connected to the upper end of the movable plate 24. One end of the lead screw 35 passes through the inner wall of the fixed frame 22 and is fixedly connected to a handwheel. The side wall of the lead screw 35 outside the fixed frame 22 is threaded, and a nut 37 is connected to the threaded side wall to limit the rotation position of the lead screw 35.

[0049] At the initial grounding stage, the nut 37 is rotated to separate from the side wall of the fixed frame 22. Then, the handwheel is rotated forward, causing the lead screw 35 to rotate forward, which in turn causes the slider 36 to move the moving plate 24 to the left (e.g., ...). Figure 10 As shown), the first gear 27 moves to the left via the second ring 26, and the second gear 28 moves to the left via the first ring 25. Under the action of the rake rod 29, the first gear 27 rotates in the forward direction when it moves to the left, and then the second gear 28 drives the first ring 25 to rotate in the reverse direction. This allows the wire 5 to be released from the winding roller 23 during the leftward movement of the first ring 25, making it easier for the staff to pull out the first insulating post 6 and the second insulating post 7 for grounding.

[0050] After grounding is completed, the exposed wire 5 outside the cabinet 1 is quite long. At this point, turn the handwheel in the opposite direction to make the slider 36 move the moving plate 24 to the right (e.g., Figure 10 As shown), the first gear 27 and the second gear 28 move to the right, causing the first gear 27 to rotate in the opposite direction when it moves to the right. This causes the second gear 28 to drive the first ring 25 to rotate in the forward direction, so that the first ring 25 can wind the wire 5 on the winding roller 23 during its movement to the right. This makes it easier to collect the exposed wire 5 into the fixed frame 22, preventing the wire 5 from being exposed too much on the outer surface and causing corrosion and cracking.

[0051] A tensioning mechanism is set up so that during the tensioning process of the wire 5, the position of the end of the wire 5 connected to the electrical equipment inside the cabinet 1 remains unchanged, ensuring the safe and stable connection between the wire 5 and the electrical equipment inside the cabinet 1.

[0052] The fixed frame 22 is equipped with a driving mechanism, which includes a liquid storage frame 30 fixedly connected to the inner wall of the fixed frame 22. A driving plate 31 is slidably connected to the inner wall of the liquid storage frame 30. Hydraulic oil is contained in the liquid storage frame 30. The side wall of the driving plate 31 is fixedly connected to the side wall of the moving plate 24 through a rectangular rod 32. The inner wall of the liquid storage frame 30 is fixedly connected to the inner wall of one of the strip cavities 17 through a hose 33. The inner walls of two adjacent strip cavities 17 near the second spring 19 are fixedly connected to arc-shaped tubes 34 (e.g., Figure 8 (As shown).

[0053] When the moving plate 24 moves to the left (e.g.) Figure 3 and Figure 10 As shown), the rectangular rod 32 drives the drive plate 31 to move to the left. At this time, the liquid storage box 30 absorbs the hydraulic oil in the four strip cavities 17 through the hose 33 and four arc-shaped pipes 34. At this time, the four slide plates 18 move away from each other under the action of multiple second springs 19. The coolant in the four annular bladders 16 is absorbed through multiple connecting pipes 20, causing the four annular bladders 16 to contract and not obstruct the entry of the T-shaped insulating base 3.

[0054] The upper end of the contact rod 4 inside the T-shaped insulating base 3 is in contact with the top of the groove 9. After the side wall of the contact head 2 is located in the contact groove 10, it will tighten the wire 5. At this time, when the moving plate 24 moves to the right (e.g. Figure 3 and Figure 10 As shown), the rectangular rod 32 drives the drive plate 31 to move to the right. At this time, the liquid storage frame 30 squeezes hydraulic oil into the four strip cavities 17 through the hose 33 and four arc-shaped pipes 34. At this time, the four slide plates 18 approach each other and squeeze coolant into the four annular bladders 16 through multiple connecting pipes 20, so that the four annular bladders 16 expand and fit with the T-shaped insulating base 3. At the same time, the four slide plates 18 approach each other and drive the four insulating plates 14 to approach each other through the four U-shaped rods 21, so that the four insulating plates 14 are respectively inserted into the four slots 12, fixing the position of the contact rod 4.

[0055] A third ring 38 is rotatably connected through the inner wall of the fixed frame 22. A coating ring 39 is fixedly connected to the inner wall of the third ring 38. The coating ring 39 is hollow. Multiple liquid outlet holes 40 are opened on the inner wall of the coating ring 39 away from the third ring 38. An inlet pipe 41 is fixedly connected to the inner wall of the coating ring 39 away from the liquid outlet holes 40. The inlet pipe 41 is connected to an external liquid pump. The side wall of the wire 5 is attached to the inner wall of the coating ring 39.

[0056] The first wheel 42 is fixedly connected to the side wall of the lead screw 35, and the second wheel 43 is fixedly connected to the side wall of the third ring 38 located within the fixed frame 22. A synchronous belt connects the first wheel 42 and the second wheel 43.

[0057] Furthermore, the liquid outlet 40 contains an anti-wear protective agent, which can reduce friction on the surface of the wire 5 and prevent corrosion. When the lead screw 35 rotates and the wire 5 moves within the fixed frame 22, the third ring 38 is driven to rotate through the first wheel 42, the synchronous belt, and the second wheel 43, which in turn drives the coating ring 39 to rotate. During the movement of the wire 5, the anti-wear protective agent can be evenly applied to the side wall of the wire 5. At the same time, the liquid inlet pipe 41 is connected to the external liquid pump. The rotation of the third ring 38 is not unlimited. After the rotation stops, the liquid inlet pipe 41 can be separated from the external liquid pump, so there will be no excessive entanglement of the pipeline.

[0058] When grounding occurs during the use of cabinet 1, first rotate nut 37 to separate it from the side wall of fixed frame 22, then rotate handwheel forward to drive screw 35 to rotate forward, causing slider 36 to move moving plate 24 to the left (e.g., Figure 10 As shown), the first gear 27 moves to the left via the second ring 26, and the second gear 28 moves to the left via the first ring 25. Under the action of the rake rod 29, the first gear 27 rotates in the forward direction when it moves to the left, and then the second gear 28 drives the first ring 25 to rotate in the reverse direction. This allows the wire 5 to be released from the winding roller 23 during the leftward movement of the first ring 25, making it easier for the staff to pull out the first insulating post 6 and the second insulating post 7 for grounding.

[0059] When the moving plate 24 moves to the left (e.g.) Figure 3 and Figure 10 As shown), the rectangular rod 32 drives the drive plate 31 to move to the left. At this time, the liquid storage box 30 absorbs the hydraulic oil in the four strip cavities 17 through the hose 33 and four arc-shaped pipes 34. At this time, the four slide plates 18 move away from each other under the action of multiple second springs 19. The coolant in the four annular bladders 16 is absorbed through multiple connecting pipes 20, causing the four annular bladders 16 to contract and not obstruct the entry of the T-shaped insulating base 3.

[0060] Then, the staff member holds the first insulating post 6, and inserts it into the rectangular groove 8 after the side wall of the T-shaped insulating base 3 is attached to the side wall of the limiting strip 11. Then, the staff member presses down the first insulating post 6 so that the upper end of the contact rod 4 in the T-shaped insulating base 3 is attached to the top of the groove 9. At this time, the side wall of the contact head 2 is located in the contact groove 10, realizing the grounding and conduction function, and the operation is quick.

[0061] Then rotate the handwheel in the opposite direction, causing slider 36 to move moving plate 24 to the right (e.g.) Figure 3 and Figure 10As shown), the rectangular rod 32 drives the drive plate 31 to move to the right. At this time, the liquid storage frame 30 squeezes hydraulic oil into the four strip cavities 17 through the hose 33 and four arc-shaped pipes 34. At this time, the four slide plates 18 approach each other and squeeze coolant into the four annular bladders 16 through multiple connecting pipes 20, so that the four annular bladders 16 expand and fit with the T-shaped insulating base 3. At the same time, the four slide plates 18 approach each other and drive the four insulating plates 14 to approach each other through the four U-shaped rods 21, so that the four insulating plates 14 are respectively inserted into the four slots 12 to fix the position of the contact rod 4.

[0062] The sidewalls of the four annular bladders 16 are all in contact with the outer sidewall of the T-shaped insulating base 3, achieving complete coverage of the outer sidewall of the T-shaped insulating base 3 (e.g., Figure 8 As shown in the figure, this prevents external moisture from entering the rectangular groove 8, increases the grounding resistance, and also stabilizes the position of the T-shaped insulating base 3.

[0063] Furthermore, each of the four annular bladders 16 is equipped with coolant, which can absorb the heat on the contact rod 4 through the T-shaped insulating base 3, and at the same time absorb the heat on the contact head 2, so as to avoid creep caused by thermal expansion on the contact rod 4 and the contact head 2, which would lead to thickening of the oxide film on the contact surface and form a vicious cycle.

[0064] When slider 36 moves moving plate 24 to the right (e.g.) Figure 10 As shown), the first gear 27 and the second gear 28 move to the right, so that the first gear 27 rotates in the opposite direction when it moves to the right, and the second gear 28 drives the first ring 25 to rotate in the forward direction, so that the first ring 25 can wind the wire 5 on the winding roller 23 during the movement to the right, which makes it easier to put the exposed wire 5 into the fixed frame 22 and avoid the wire 5 being exposed too much on the outer surface and corroding and cracking.

[0065] After grounding is completed, the nut 37 is tightly fitted to the side wall of the fixed frame 22, which limits and fixes the rotation position of the lead screw 35.

[0066] At the same time, when the lead screw 35 rotates and causes the wire 5 to move within the fixed frame 22, the third ring 38 is driven to rotate through the first wheel 42, the synchronous belt and the second wheel 43, which in turn drives the coating ring 39 to rotate. Then, the anti-wear protective agent flowing out through the multiple liquid outlet holes 40 can be evenly coated on the side wall of the wire 5 during the movement of the wire 5, reducing the friction on the surface of the wire 5 and preventing corrosion.

[0067] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-voltage switch cabinet quick grounding device, comprising a cabinet body (1), a contact head (2), a T-shaped insulating base (3) and a contact rod (4), the contact rod (4) is inserted through the side wall of the T-shaped insulating base (3), and a wire (5) is installed on the contact head (2), characterized in that, Also include the first insulating column (6) and the second insulating column (7), the first insulating column (6) lower end is fixedly connected with the second insulating column (7) upper end, the second insulating column (7) lower end is through the rectangular slot (8) is set, the first insulating column (6) lower end is set recess (9), the contact rod (4) side wall and recess (9) inner wall are pasted, the contact rod (4) upper end is set contact slot (10), the contact head (2) side wall and contact slot (10) inner wall are pasted; The clamping mechanism, the clamping mechanism includes four clamping slots (12) set in the side wall of the contact rod (4), the contact slot (10) inner wall is set with four sliding grooves (13) corresponding to four clamping slots (12), four sliding grooves (13) inner wall are all slidingly connected with the insulating plate (14), the insulating plate (14) side wall is all elastically connected with the inner wall of its corresponding sliding groove (13) through the first spring (15), the rectangular slot (8) four inner wall corner is all fixedly connected with the limiting strip (11), the T-shaped insulating base (3) outer side wall and four limiting strips (11) side wall are pasted; The rectangular slot (8) is internally provided with a fixing mechanism for fixing the T-shaped insulating base (3), the fixing mechanism comprises four annular capsules (16) fixedly connected to the inner wall of the rectangular slot (8), the annular capsules (16) are located between the adjacent two limiting strips (11), the inner wall of the second insulating column (7) is provided with four strip cavities (17) corresponding to the four annular capsules (16), the inner wall of each of the four strip cavities (17) is sealingly and slidingly connected with a sliding plate (18), the inner wall of the strip cavity (17) is fixedly connected with a plurality of connecting pipes (20) in communication with the inner wall of the annular capsule (16), the sliding plate (18) is provided with a cooling liquid in a sealed space formed by the side wall close to the connecting pipe (20) and the inner wall of the strip cavity (17), and each of the four annular capsules (16) is provided with the cooling liquid; The side wall of the sliding plate (18) away from the connecting pipe (20) is elastically connected with the inner wall of its corresponding strip cavity (17) through a plurality of second springs (19), the four sliding grooves (13) correspond to the four strip cavities (17), the inner walls of the sliding groove (13) and the strip cavity (17) corresponding thereto are sealingly and slidingly connected with a U-shaped rod (21), one end of the U-shaped rod (21) located in the sliding groove (13) is fixedly connected with the side wall of the insulating plate (14), and the other end of the U-shaped rod (21) located in the strip cavity (17) is fixedly connected with the side wall of the sliding plate (18).

2. The quick earthing device of a high voltage switchgear according to claim 1, characterized in that, The cabinet (1) is internally provided with a tensioning mechanism, the tensioning mechanism comprises a fixed frame (22) fixedly connected to the inner wall of the cabinet (1), the fixed frame (22) is fixedly connected with a winding roller (23) through a support, the wire (5) is wound on the winding roller (23), the inner wall of the fixed frame (22) is slidingly connected with a moving plate (24), the side wall of the moving plate (24) is rotatably connected with a first ring (25) penetrating through the lower side wall, the first ring (25) is sleeved on the winding roller (23), and the wire (5) penetrates through the side wall of the first ring (25).

3. The quick earthing device of a high voltage switchgear according to claim 2, characterized in that, The second ring (26) is fixedly connected through the side wall of the moving plate (24), the first gear (27) is slidably connected in the side wall of the second ring (26) and can rotate, the second gear (28) is fixedly connected in the side wall of the first ring (25), the first gear (27) and the second gear (28) are engaged, the lever (29) is fixedly connected to the inner wall of the fixed frame (22), and the side wall of the lever (29) is threadedly connected with the side wall of the first gear (27).

4. The quick earthing device of the high voltage switchgear according to claim 2, characterized in that, The fixed frame (22) is rotatably connected with the lead screw (35) on the upper wall, the side wall of the lead screw (35) is threadedly connected with the sliding block (36), the lower end of the sliding block (36) is fixedly connected with the upper end of the moving plate (24), one end of the lead screw (35) penetrates the inner wall of the fixed frame (22) and is fixedly connected with the hand wheel, and the side wall of the lead screw (35) outside the fixed frame (22) is provided with a thread, and the thread side wall is connected with the nut (37).

5. The quick earthing device of the high voltage switchgear according to claim 2, characterized in that, The fixed frame (22) is rotatably connected with the lead screw (35) on the upper wall, the side wall of the lead screw (35) is threadedly connected with the sliding block (36), the lower end of the sliding block (36) is fixedly connected with the upper end of the moving plate (24), one end of the lead screw (35) penetrates the inner wall of the fixed frame (22) and is fixedly connected with the hand wheel, and the side wall of the lead screw (35) outside the fixed frame (22) is provided with a thread, and the thread side wall is connected with the nut (37).

6. The quick earthing device of the high voltage switchgear according to claim 4, characterized in that, The fixed frame (22) is rotatably connected with the lead screw (35) on the upper wall, the side wall of the lead screw (35) is threadedly connected with the sliding block (36), the lower end of the sliding block (36) is fixedly connected with the upper end of the moving plate (24), one end of the lead screw (35) penetrates the inner wall of the fixed frame (22) and is fixedly connected with the hand wheel, and the side wall of the lead screw (35) outside the fixed frame (22) is provided with a thread, and the thread side wall is connected with the nut (37).

7. The quick earthing device of a high voltage switchgear according to claim 6, characterized in that, The fixed frame (22) is rotatably connected with the lead screw (35) on the upper wall, the side wall of the lead screw (35) is threadedly connected with the sliding block (36), the lower end of the sliding block (36) is fixedly connected with the upper end of the moving plate (24), one end of the lead screw (35) penetrates the inner wall of the fixed frame (22) and is fixedly connected with the hand wheel, and the side wall of the lead screw (35) outside the fixed frame (22) is provided with a thread, and the thread side wall is connected with the nut (37). The fixed frame (22) is rotatably connected with the lead screw (35) on the upper wall, the side wall of the lead screw (35) is threadedly connected with the sliding block (36), the lower end of the sliding block (36) is fixedly connected with the upper end of the moving plate (24), one end of the lead screw (35) penetrates the inner wall of the fixed frame (22) and is fixedly connected with the hand wheel, and the side wall of the lead screw (35) outside the fixed frame (22) is provided with a thread, and the thread side wall is connected with the nut (37).

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