Grounding protection structure of switch equipment

Abstract

The invention discloses a switch equipment grounding protection structure, and relates to the technical field of power transmission safety equipment, the switch equipment grounding protection structure comprises a grounding box body, the inner wall of the box body is fixedly provided with a mounting rack, the side end of the mounting rack is fixedly provided with a grounding rack, and one end, close to the mounting rack, of the grounding rack is rotatably provided with a rotating shaft; the outer wall of the rotating shaft is symmetrically and fixedly sleeved with special-shaped plates, the tops of the special-shaped plates are provided with contact frames used for making contact with the contact pieces, contact cylinders are firmly installed on the inner walls of the contact frames, graphite contact heads are arranged in the inner walls of the contact cylinders in a sliding mode, and initial metal friction contact of the contact switch is converted into sliding graphite structure abutting connection. According to the grounding switch, the surface of the graphite block and the surface of the graphite contact head cannot be ablated and deformed in the process of repeatedly opening and closing the grounding switch, meanwhile, the movable frame is pulled to adjust the extrusion force of the graphite contact head to the graphite block under the gravity action of the balancing weight, and the extrusion force is kept stable after being used for a long time.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission safety equipment, in particular to a grounding protection structure for switchgear. Background Art

[0002] A switchgear grounding system, also known as a grounding switch, is a mechanical grounding device that releases static charge from the equipment being repaired and the circuits being repaired, as well as ensuring the safety of maintenance personnel during power outages. It can withstand current for a certain period of time under abnormal conditions (such as short circuits), but does not pass load current under normal circumstances. It is typically part of an isolating switch.

[0003] When the grounding switch is frequently opened and closed, electrical wear will occur between the contacts, which will cause ablation and deformation of the contact surface. The contact surface will gradually oxidize and wear, the contact area between the contacts will decrease, the contact resistance will increase, and its contact performance will be affected, thus causing poor grounding.

[0004] After long-term use, the spring of the contact will age or fatigue, resulting in insufficient pressure to push the contacts, and will not be able to provide enough pressure to make the contacts in close contact. This will cause the contact resistance to increase, and then cause poor contact, affecting the electrical performance. Therefore, based on the above search and combined with the existing problems, a switch device grounding protection structure is provided. Summary of the Invention

[0005] The object of the present invention is to provide a grounding protection structure for a switchgear to solve the problems mentioned in the background art above, such as electrical wear between contacts and insufficient pressure between contacts due to aging or fatigue of the springs of the contacts after long-term use.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A switchgear grounding protection structure covers a grounding box body installed on the ground, the inner wall of the box body is fixedly equipped with a mounting bracket, a high-voltage sensor is fixedly equipped on one end of the mounting bracket away from the box body, a contact plate is fixedly equipped on one end of the high-voltage sensor away from the mounting bracket, and a contact piece is fixedly equipped on the other end of the contact plate, both ends of the contact piece are provided with mounting grooves, graphite blocks are fixedly equipped in the mounting grooves, and a grounding bracket is fixedly equipped on the side end of the mounting bracket, and a rotating shaft is rotatably installed on one end of the grounding bracket close to the mounting bracket, a special-shaped plate is symmetrically fixedly sleeved on the outer wall of the rotating shaft, a contact bracket for contacting the contact piece is provided on the top of the special-shaped plate, a contact cylinder is firmly installed on the inner wall of the contact rack, and graphite contact heads are slidably arranged in the inner wall of the contact cylinder, the lower end of the graphite contact head is connected to a pushing mechanism for pushing the graphite contact head to move, and the lower end of the contact rack is provided with a protective mechanism to prevent the graphite contact head from contacting the contact rack during movement.

[0008] Furthermore, a mounting hole is provided at the upper end of the special-shaped plate, and the contact frame is fixed to one side of the mounting hole opened in the special-shaped plate by bolts. A grounding rod is fixedly installed at one end of the contact frame close to the special-shaped plate, and grounding wires are firmly installed at both ends of the grounding rod, and these grounding wires are fixedly welded to the inner wall of the grounding box.

[0009] Furthermore, the pushing mechanism includes a pushing rod, which is slidably mounted on the end of the contact cylinder away from the graphite contact head, and a sliding ring is fixedly mounted on the end of the pushing rod close to the graphite contact head, and a contact spring is fixedly mounted on the end of the sliding ring close to the graphite contact head, and a mounting ring is fixedly mounted on the end of the contact spring away from the sliding ring, and the graphite contact head is fixedly mounted on the end of the mounting ring away from the contact spring.

[0010] Furthermore, a connecting rod is fixedly installed on the end of the pushing rod away from the sliding ring, a moving frame is fixedly installed on the end of the connecting rod away from the sliding ring, and the moving frame is slidably installed on the outer wall of the contact frame, a connecting rope is fixedly installed on the end of the moving frame close to the graphite contact head, and a counterweight block is fixedly installed on the other end of the connecting rope, a counterweight frame is fixedly installed on the inner wall of the grounding box close to the counterweight block, and the counterweight block is slidably arranged in the counterweight frame.

[0011] Furthermore, a limit block is fixedly installed on one end of the movable frame close to the contact frame, a spring clip is provided on the inner wall of the contact frame close to the limit block, a limit rod is rotatably installed on the inner wall of the grounding box close to the contact frame, and a control frame is fixedly sleeved on the outer wall of the limit rod close to the limit block.

[0012] Furthermore, the protective mechanism includes a two-way inflation cylinder, and the two-way inflation cylinder is rotatably mounted on one end of the grounding frame close to the mounting frame. An inflation rod is provided at one end of the two-way inflation cylinder away from the grounding frame, and a fixing ring is fixedly mounted on the output end of the inflation rod.

[0013] Furthermore, an air transmission tube is rotatably installed in the inner wall of the fixed ring, and the air transmission tube is fixedly installed on the inner wall of the grounding rod. The output end of the two-way air cylinder is symmetrically fixed with an air tube, and the end of the air tube away from the two-way air cylinder is fixedly installed on the end of the air transmission tube away from the grounding rod.

[0014] Furthermore, an exhaust pipe is fixedly installed on the outer wall of the air transfer tube close to the contact cylinder, an exhaust ring is fixedly installed on the end of the exhaust pipe away from the air transfer tube, and the exhaust ring is fixedly installed on the end of the contact cylinder close to the graphite contact head.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention transforms the initial metal friction contact of the contact switch into a sliding graphite structure resistance connection, ensuring that the surfaces of the graphite block and the graphite contact head will not be burned or deformed during the repeated opening and closing of the grounding switch. This not only avoids the contact area of the grounding switch contact from being reduced due to repeated operation, but also prevents the increase of contact resistance, thereby ensuring its stable contact performance and effectively preventing the occurrence of poor grounding.

[0017] At the same time, the gravity of the counterweight is used to pull the movable frame to adjust the extrusion force of the graphite contact head on the graphite block, ensuring that the extrusion force remains stable after long-term use;

[0018] 2. The present invention uses an air transmission tube to drive the inflation rod to move. When the contact frame rotates to a certain angle, the force of the connecting spring pushing the contact frame gradually increases, the movement speed of the inflation rod accelerates, and the air pressure in the two-way inflation cylinder increases accordingly, thereby slowing down the rotation speed of the contact frame and playing a buffering role. This is intended to avoid collision between the contact frame and the grounding frame during repeated switching processes, and prevent deformation of the contact frame caused by long-term collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 Schematic diagram of the structure of the grounding frame in the present invention;

[0021] Figure 3 Schematic diagram of the structure of the rotating shaft in the present invention;

[0022] Figure 4 Schematic diagram of the structure of the inflation tube in the present invention;

[0023] Figure 5 Schematic diagram of the structure of the contact frame in the present invention;

[0024] Figure 6 Schematic diagram of the structure of the spring buckle in the present invention;

[0025] Figure 7 It is a structural schematic diagram of the contact spring in the present invention.

[0026] In the figure: 1, grounding box; 101, mounting frame; 102, high-voltage sensor; 103, contact plate; 104, contact sheet; 105, graphite block;

[0027] 106, grounding frame; 107, rotating shaft; 108, special-shaped plate; 109, contact frame; 110, contact cylinder; 111, graphite contact head;

[0028] 112. Connecting spring; 113. Connecting bolt; 114. Connecting hole;

[0029] 115. Mounting hole; 116. Grounding rod; 117. Grounding wire;

[0030] 2. Push mechanism; 201. Push rod; 202. Contact spring; 203. Mounting ring; 204. Connecting rod; 205. Moving frame; 206. Connecting rope; 207. Counterweight; 208. Counterweight frame; 209. Limit block; 210. Spring buckle; 211. Limit rod; 212. Control frame; 213. Sliding ring;

[0031] 3. Protective mechanism; 301. Two-way inflation cylinder; 302. Inflating rod; 303. Fixing ring; 304. Air transmission tube; 305. Inflating tube; 306. Exhaust pipe; 307. Exhaust ring. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1 to 7A switchgear grounding protection structure includes a grounding box 1 installed on the ground. The grounding box 1 is made of energized metal material. A mounting bracket 101 is fixedly mounted on the inner wall of the box. A high-voltage sensor 102 is fixedly mounted on the end of the mounting bracket 101 away from the box. This sensor is of prior art and will not be described in detail. A contact plate 103 is fixedly mounted on the end of the high-voltage sensor 102 away from the mounting bracket 101. A contact piece 104 is fixedly mounted on the other end of the contact plate 103. Both ends of the contact piece 104 are provided with mounting grooves, and graphite blocks 105 are fixedly mounted in the mounting grooves. A grounding frame 106 is fixedly mounted on the side end of the mounting bracket 101. A rotating shaft 107 is rotatably mounted on the end of the grounding frame 106 close to the mounting bracket 101. , a rotating groove is provided at one end of the rotating shaft 107 away from the grounding frame 106. The rotating groove is provided so that when the staff rotates the rotating shaft 107 through the tool, there will be no slipping between the tool and the rotating shaft 107. The outer wall of the rotating shaft 107 is symmetrically fixed with a special-shaped plate 108. The top of the special-shaped plate 108 is provided with a contact frame 109 for contacting the contact piece 104. The above-mentioned contact frame 109 is called a special-shaped plate 108. There are two pieces installed in total, and the contact frame 109 and the special-shaped plate 108 are inclined at an angle of 5 degrees. A contact cylinder 110 is firmly installed on the inner wall of the contact frame 109. A graphite contact head 111 is slidably configured in the inner wall of the contact cylinder 110. The graphite contact head 111 and the graphite block 105 are connected. The graphite contact head 111 is inclined at an angle of 5 degrees, and the inclined surface of the graphite contact head 111 is parallel to the surface of the graphite block 105. The graphite block 105 and the graphite contact head 111 are both made of graphite. Graphite has high electrical conductivity and thermal conductivity in the plane, and graphite has high chemical stability. The lower end of the graphite contact head 111 is connected with a pushing mechanism 2 for pushing the graphite contact head 111 to move. The lower end of the contact frame 109 is provided with a protective mechanism 3 for preventing the graphite contact head 111 from contacting the contact frame 109 during movement. Specifically, when the grounding protection switch needs to be closed, the rotating shaft 107 is rotated to make the special-shaped plate 108 drive the contact frame 109 to start rotating, and the contact frame 109 rotates After moving to the position of graphite block 105, graphite contact head 111 starts to move and contacts the graphite blocks 105 installed at both ends of contact piece 104. This changes the traditional direct friction contact mode to sliding contact, effectively avoiding friction between graphite block 105 and graphite contact head 111 and other components such as contact piece 104. By converting the initial friction contact of the contact switch into a sliding resistance connection, it is ensured that during the repeated opening and closing of the grounding switch, the surfaces of graphite block 105 and graphite contact head 111 will not be burned or deformed. This not only avoids the contact area of the grounding switch contact from being reduced due to repeated operation, but also prevents the contact resistance from increasing, thereby ensuring its stable contact performance and effectively preventing the occurrence of poor grounding.

[0034] See also Figures 1 to 3, a connecting spring 112 is symmetrically installed on the end of the grounding frame 106 away from the mounting frame 101, and a connecting bolt 113 is rotatably installed on the end of the connecting spring 112 away from the grounding frame 106. A connecting hole 114 is opened on the side of the special-shaped plate 108 away from the mounting frame 101, and the connecting bolt 113 is rotatably set in the connecting hole 114. Specifically, when the special-shaped plate 108 rotates, the connecting spring 112 connected between the special-shaped plate 108 and the grounding frame 106 is compressed. When it rotates to a specific angle, the connecting spring 112 pushes the special-shaped plate 108 to continue rotating, thereby pushing the contact frame 109 to an appropriate position, thereby realizing the limiting or pushing function.

[0035] See also Figures 1 to 3 , a mounting hole 115 is provided at the upper end of the special-shaped plate 108, and the contact frame 109 is fixed to one side of the mounting hole 115 opened on the special-shaped plate 108 by bolts, and a grounding rod 116 is fixedly installed at one end of the contact frame 109 close to the special-shaped plate 108, and grounding wires 117 are firmly installed at both ends of the grounding rod 116, and these grounding wires 117 are fixedly welded to the inner wall of the grounding box 1. Specifically, when the graphite contact head 111 on the contact frame 109 contacts the contact piece 104 and starts to be energized, the current is transmitted to the grounding box 1 through the grounding rod 116 installed on the contact frame 109 and the grounding wires 117 at both ends, and then the grounding box 1 conducts the current into the earth, thereby realizing the grounding protection function.

[0036] See also Figures 1 to 7 The pushing mechanism 2 includes a pushing rod 201, which is slidably mounted on the end of the contact cylinder 110 away from the graphite contact head 111. The end of the pushing rod 201 close to the graphite contact head 111 is fixedly mounted with a sliding ring 213. The end of the sliding ring 213 close to the graphite contact head 111 is fixedly mounted with a contact spring 202, and the end of the contact spring 202 away from the sliding ring 213 is fixedly mounted with a mounting ring 203. The sliding ring 213 and the mounting ring 203 are both designed as frame rings. shape to avoid generating air pressure during movement. In addition, the graphite contact head 111 is fixedly mounted on the end of the mounting ring 203 away from the contact spring 202. Specifically, when the graphite contact head 111 moves and contacts the graphite block 105, if the mounting ring 203 continues to move, the sliding ring 213 and the mounting ring 203 will squeeze the contact spring 202, causing it to compress, thereby preventing the graphite contact head 111 from being subjected to excessive pushing force after contacting the graphite block 105, thereby preventing damage to the graphite contact head 111.

[0037] See also Figures 1 to 7The end of the push rod 201 away from the sliding ring 213 is fixedly installed with a connecting rod 204, and the end of the connecting rod 204 away from the sliding ring 213 is slidably connected to the moving frame 205. A sliding groove is provided at the position where the connecting rod 204 and the moving frame 205 are slidably connected, and the moving frame 205 is slidably installed on the outer wall of the contact frame 109. In addition, a roller is installed on the upper end of the moving frame 205 in a rotatable manner, and a guide ring is also installed on the inner wall of the contact frame 109 in a rotatable manner. This design enables the roller and the guide ring to effectively prevent the movable frame 205 from direct contact with other structures, thereby preventing damage. A connecting rope 206 is fixedly installed at one end of the movable frame 205 close to the graphite contact head 111, and a counterweight block 207 is fixedly installed at the other end of the connecting rope 206. A counterweight frame 208 is fixedly installed on the inner wall of the grounding box 1 close to the counterweight block 207, and the counterweight block 207 is slidably set in the counterweight frame 208. Specifically, the gravity of the counterweight block 207 is used to pull the movable frame 205 to adjust the squeezing force of the graphite contact head 111 on the graphite block 105, ensuring that the squeezing force remains stable after long-term use.

[0038] See also Figures 1 to 7 , a limit block 209 is fixedly installed on one end of the movable frame 205 close to the contact frame 109, and a limit hole is provided on the end of the limit block 209 away from the movable frame 205, and a spring clip 210 is provided on the inner wall of the contact frame 109 close to the limit block 209, and the spring clip 210 is stuck in the limit hole set in the limit block 209. When the spring clip 210 is stuck in the limit hole, the movable frame 205 cannot move. When the spring clip 210 is disengaged from the limit hole, the connecting rope 206 drives the movable frame 205 to start moving, and a limit rod 211 is rotatably installed on the inner wall of the grounding box 1 close to the contact frame 109. The limit rod 211 is fixedly sleeved with a control frame 212 on the outer wall of the limit block 209. Specifically, when the contact frame 109 rotates to the grounding box 1 close to the limit When one end of the rod 211 is moved, the control frame 212 mounted on the limit rod 211 will push the spring buckle 210 to start shrinking, thereby separating the limit block 209 from the spring buckle 210. At this time, the counterweight block 207 drives the movable frame 205 to start moving through the connecting rope 206, and the movable frame 205 drives the graphite contact head 111 to move. The graphite contact head 111 squeezes and contacts the graphite block 105, thereby completing the opening operation. If it needs to be closed, it is only necessary to rotate the control frame 212. The rotation of the control frame 212 will push the movable frame 205 to move, so that the graphite contact head 111 shrinks back into the contact cylinder 110 and no longer contacts the graphite block 105. The spring buckle 210 is re-fixedly connected to the limit block 209. Finally, the rotating shaft 107 is rotated to disconnect the switch.

[0039] See also Figures 3 to 7The protective mechanism 3 includes a two-way air cylinder 301, and the two-way air cylinder 301 is rotatably mounted on one end of the grounding frame 106 close to the mounting frame 101, and an air charging rod 302 is provided on the end of the two-way air cylinder 301 away from the grounding frame 106. This two-way air cylinder 301 adopts the existing technology. When the air charging rod 302 starts to move, the two-way air cylinder 301 starts to inflate immediately. Since the air outlet of the two-way air cylinder 301 is small, when the air charging rod 302 moves quickly, the gas in the two-way air cylinder 301 cannot be completely discharged, resulting in a gradual increase in the internal air pressure, thereby increasing the force required to move the air charging rod 302. The output end of the air charging rod 302 is fixedly mounted with a fixing ring 303, and an air transmission tube 304 is rotatably mounted in the inner wall of the fixing ring 303. The air transmission tube 304 is fixedly mounted on the inner wall of the grounding rod 116, and the output end of the two-way air cylinder 301 is opposite to the An inflation tube 305 is fixedly installed, and the end of the inflation tube 305 away from the two-way inflation cylinder 301 is fixedly installed on the end of the air transmission tube 304 away from the grounding rod 116. Specifically, when the contact frame 109 is pushed by the connecting spring 112, the rotating shaft 107 is driven, and the air transmission tube 304 drives the inflation rod 302 to move. When the contact frame 109 rotates to a certain angle, the force of the connecting spring 112 pushing the contact frame 109 gradually increases, the movement speed of the inflation rod 302 is accelerated, and the air pressure in the two-way inflation cylinder 301 increases accordingly, thereby slowing down the rotation speed of the contact frame 109 and playing a buffering role. This is intended to avoid collision between the contact frame 109 and the grounding frame 106 during repeated switching, prevent deformation of the contact frame 109 caused by long-term collision, and at the same time avoid damage to the graphite contact head 111 caused by the collision between the contact frame 109 and the grounding frame 106.

[0040] See also Figures 3 to 7 An exhaust pipe 306 is fixedly installed on the outer wall of the air transfer tube 304 close to the contact cylinder 110, and an exhaust ring 307 is fixedly installed on the end of the exhaust pipe 306 away from the air transfer tube 304, and the exhaust ring 307 is fixedly installed on the end of the contact cylinder 110 close to the graphite contact head 111. When the exhaust ring 307 is in the exhaust process, the air flow forms an air film between the graphite contact head 111 and the contact cylinder 110, effectively avoiding direct contact between the graphite contact head 111 and the contact cylinder 110 during movement, thereby reducing friction and preventing the graphite contact head 111 from being excessively consumed due to friction, thereby significantly extending its service life.

[0041] The working principle of the present invention is as follows: when the grounding switch needs to be opened, the rotating shaft 107 is rotated, and the rotating shaft 107 drives the special-shaped plate 108 to start rotating, and the contact frame 109 starts to rotate. When the movable frame 205 on the contact frame 109 rotates to one side of the limit rod 211 rotatably installed in the grounding box 1, the control frame 212 mounted on the limit rod 211 will push the spring buckle 210 to start contracting, thereby separating the limit block 209 from the spring buckle 210. At this time, the counterweight block 207 drives the movable frame 205 to start moving through the connecting rope 206, and the movable frame 205 drives the graphite contact head 111 to move. The graphite contact head 111 squeezes and resists the graphite block 105, thereby completing the opening operation, avoiding the contact area of the grounding switch contact from being reduced due to repeated operations, and preventing the contact resistance from increasing, thereby ensuring its stable contact performance and effectively preventing the occurrence of poor grounding.

[0042] When the graphite contact head 111 moves and contacts the graphite block 105, if the mounting ring 203 continues to move, the sliding ring 213 and the mounting ring 203 will press the contact spring 202, compressing it, thereby preventing the graphite contact head 111 from being subjected to excessive pushing force after contacting the graphite block 105, thereby preventing the graphite contact head 111 from being damaged.

[0043] At the same time, when the graphite contact head 111 moves, the gas in the two-way inflation cylinder 301 is discharged through the exhaust ring 307, forming an air film between the graphite contact head 111 and the contact cylinder 110, effectively avoiding direct contact between the graphite contact head 111 and the contact cylinder 110 during movement, thereby reducing friction and preventing the graphite contact head 111 from being excessively consumed due to friction, thereby significantly extending its service life.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A switchgear grounding protection structure, comprising a grounding box (1) mounted on the ground, characterized in that: The inner wall of the box is fixedly provided with a mounting frame (101), a high-voltage sensor (102) is fixedly provided at one end of the mounting frame (101) away from the box, a contact plate (103) is fixedly provided at one end of the high-voltage sensor (102) away from the mounting frame (101), a contact piece (104) is fixedly provided at the other end of the contact plate (103), mounting grooves are provided at both ends of the contact piece (104), graphite blocks (105) are fixedly provided in the mounting grooves, a grounding frame (106) is fixedly provided at the side end of the mounting frame (101), a rotating shaft (107) is rotatably provided at one end of the grounding frame (106) close to the mounting frame (101), and the rotating shaft (107) is rotatably provided at the other end of the rotating shaft (107). 7) A special-shaped plate (108) is symmetrically fixedly sleeved on the outer wall, a contact frame (109) for contacting the contact piece (104) is provided on the top of the special-shaped plate (108), a contact cylinder (110) is firmly installed on the inner wall of the contact frame (109), a graphite contact head (111) is slidably configured in the inner wall of the contact cylinder (110), the lower end of the graphite contact head (111) is connected to a pushing mechanism (2) for pushing the graphite contact head (111) to move, and a protective mechanism (3) is provided at the lower end of the contact frame (109) to prevent the graphite contact head (111) from contacting the contact frame (109) during movement.

2. A switchgear grounding protection structure according to claim 1, characterized in that: The upper end of the special-shaped plate (108) is provided with a mounting hole (115), and the contact frame (109) is fixed to one side of the mounting hole (115) opened in the special-shaped plate (108) by means of bolts. A grounding rod (116) is fixedly installed at one end of the contact frame (109) close to the special-shaped plate (108), and grounding wires (117) are firmly installed at both ends of the grounding rod (116), and these grounding wires (117) are fixedly welded to the inner wall of the grounding box (1).

3. The switchgear grounding protection structure according to claim 1, characterized in that: The pushing mechanism (2) comprises a pushing rod (201) which is slidably mounted on an end of the contact cylinder (110) away from the graphite contact head (111); a sliding ring (213) is fixedly mounted on an end of the pushing rod (201) close to the graphite contact head (111); a contact spring (202) is fixedly mounted on an end of the sliding ring (213) close to the graphite contact head (111); a mounting ring (203) is fixedly mounted on an end of the contact spring (202) away from the sliding ring (213); and the graphite contact head (111) is fixedly mounted on an end of the mounting ring (203) away from the contact spring (202).

4. A switchgear grounding protection structure according to claim 3, characterized in that: A connecting rod (204) is fixedly installed on one end of the push rod (201) away from the sliding ring (213), a moving frame (205) is fixedly installed on one end of the connecting rod (204) away from the sliding ring (213), and the moving frame (205) is slidably installed on the outer wall of the contact frame (109), a connecting rope (206) is fixedly installed on one end of the moving frame (205) close to the graphite contact head (111), and a counterweight (207) is fixedly installed on the other end of the connecting rope (206), and a counterweight frame (208) is fixedly installed on the inner wall of the grounding box (1) close to the counterweight (207), and the counterweight (207) is slidably set in the counterweight frame (208).

5. The switchgear grounding protection structure according to claim 4, characterized in that: A limit block (209) is fixedly installed on one end of the movable frame (205) close to the contact frame (109); a spring buckle (210) is provided on the inner wall of the contact frame (109) close to the limit block (209); a limit rod (211) is rotatably installed on the inner wall of the grounding box (1) close to the contact frame (109); and a control frame (212) is fixedly sleeved on the outer wall of the limit rod (211) close to the limit block (209).

6. The switchgear grounding protection structure according to claim 2, characterized in that: The protective mechanism (3) comprises a two-way inflation cylinder (301), and the two-way inflation cylinder (301) is rotatably mounted on one end of the grounding frame (106) close to the mounting frame (101), and an inflation rod (302) is provided on one end of the two-way inflation cylinder (301) away from the grounding frame (106), and a fixing ring (303) is fixedly mounted on the output end of the inflation rod (302).

7. The switchgear grounding protection structure according to claim 6, characterized in that: An air transmission tube (304) is rotatably mounted on the inner wall of the fixing ring (303), and the air transmission tube (304) is fixedly mounted on the inner wall of the grounding rod (116). An air transmission tube (305) is symmetrically fixedly mounted on the output end of the two-way air cylinder (301), and the end of the air transmission tube (304) away from the two-way air cylinder (301) is fixedly mounted on the end of the air transmission tube (304) away from the grounding rod (116).

8. The switchgear grounding protection structure according to claim 7, characterized in that: An exhaust pipe (306) is fixedly installed on the outer wall of the air transfer pipe (304) close to the contact cylinder (110), and an exhaust ring (307) is fixedly installed on one end of the exhaust pipe (306) away from the air transfer pipe (304), and the exhaust ring (307) is fixedly installed on one end of the contact cylinder (110) close to the graphite contact head (111).

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