Anti-misdisassembly high-voltage grounding device and use method

Abstract

The application provides a high-voltage grounding device preventing mistaken disassembly and a use method. The high-voltage grounding device preventing mistaken disassembly comprises a wire and a grounding mechanism. A wire clamp is hung on the wire. A grounding wire is arranged between the wire clamp and the grounding mechanism. The wire clamp is characterized in that an upper contact mechanism is arranged in the wire clamp. The upper contact mechanism is used for hanging the wire. An insulation mechanism is connected below the upper contact mechanism. The insulation mechanism is used for manual holding. A lower contact mechanism is further arranged in the upper contact mechanism. The lower contact mechanism is used for clamping the wire. A tooth disc is arranged above a lifting nut of the high-voltage grounding device preventing mistaken disassembly. A clamping plate needs to be manually opened to enable the lifting power to be powered, so that the lifting nut can rotate. A mistaken disassembly prevention mechanism requiring manual unlocking is added. The safety in the personnel maintenance process is improved. The problem of mistaken disassembly of the grounding wire in the power system maintenance process is solved.

Description

Technical Field

[0001] This invention relates to the field of power system maintenance, and in particular to a high-voltage grounding device for preventing accidental disconnection and its usage method. Background Technology

[0002] In power systems, 500 kV outgoing line equipment in power plants typically includes 500 kV bushings, voltage transformers, surge arresters, and round steel-cored aluminum stranded conductors. Before maintenance of outgoing line equipment, grounding wires must be installed to ensure the safety of maintenance personnel.

[0003] Currently in the power industry, the grounding wire for 500 kV outgoing line equipment maintenance is typically secured with spring clamps, and the grounding terminal is secured with a C-shaped clamp to the grounding copper plate. The two are connected by a soft copper wire to achieve reliable grounding. However, there is a risk of personnel accidentally loosening the grounding wire. Typically, in a 500 kV substation or 500 kV power plant outgoing line yard, one line is under maintenance while an adjacent line is in operation. If the grounding wire of the line under maintenance is accidentally removed, the induced current from the adjacent 500 kV operating line could cause accidental electric shock to personnel, posing a significant safety risk to maintenance workers.

[0004] Currently, there is a lack of a set of equipment that can remind and prevent maintenance personnel from accidentally disassembling the grounding wire. Therefore, there is a need for a set of equipment that can prevent personnel from accidentally disassembling the grounding wire, and it is equipped with a touch reminder function to prevent personnel from being electrocuted by 500 kV high induced voltage, which greatly reduces the safety risks to workers and ensures safe operation. Summary of the Invention

[0005] The main objective of this invention is to provide a high-voltage grounding device and its usage method that prevents accidental removal, thus solving the problem of personnel accidentally removing the grounding wire during power system maintenance.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a high-voltage grounding device for preventing accidental disconnection, including a conductor and a grounding mechanism, a wire clamp hanging on the conductor, a grounding wire between the wire clamp and the grounding mechanism, an upper contact mechanism in the wire clamp for holding the conductor, an insulating mechanism connected below the upper contact mechanism for manual handling, and a lower contact mechanism inside the upper contact mechanism for clamping the conductor.

[0007] In the preferred embodiment, the upper contact mechanism is hook-shaped, the top of the upper contact mechanism is provided with an arc groove, the vertically tangent side of the arc groove is provided with a guide groove, and one side of the guide groove is provided with a ground wire connection seat. The bottom of the upper contact mechanism is also provided with a rotatable polygonal shaft, with rotating holes fixed at both ends of the polygonal shaft, and a retaining plate is also provided on the polygonal shaft.

[0008] In a preferred embodiment, a conductive guide plate is provided at the center of the inner arc of the arc groove, and a positioning groove is provided at the center of the conductive guide plate; The card plate is equipped with a magnetic switch at the tail end.

[0009] In a preferred embodiment, the insulating mechanism is located below the upper contact mechanism and is fixedly connected to the upper contact mechanism. The insulating mechanism is provided with a lifting power on the side below the rotating hole. A lifting nut is located in the middle of the insulating mechanism, and a handle is also provided on the side of the insulating mechanism opposite to the lifting power.

[0010] In a preferred embodiment, a toothed disc is provided above the lifting nut, a toothed groove is provided on the circumferential surface of the lifting nut below the toothed disc, and a lifting screw is provided coaxially inside the lifting nut; The toothed disc has teeth evenly distributed around its circumference, and the front end of the clamping plate engages with the teeth.

[0011] In the preferred embodiment, the gripper bracket in the lower contact mechanism is fixed to one end of the lifting screw, the gripper bracket has a gripper that is movably provided on the left side, the top of the gripper has a guide wheel, the gripper has an anti-slip contact piece on one side below the guide wheel, and the gripper bracket has a mechanism that is consistent with the left side on the right side. A tension spring is provided between the grippers on both sides of the symmetrical arrangement, and a limit rod is also provided on the gripper bracket at both ends of the tension spring.

[0012] In a preferred embodiment, a terminal block is fixedly provided on the top of the grounding mechanism, a mounting plate is fixedly provided below the terminal block, a clamping block is fixedly provided below the mounting plate, and a clamping moving block is movably provided on one side of the clamping block; The clamping moving block is connected to the clamping stationary block via a screw. One end of the screw is equipped with a clamping handle, and the clamping stationary block has a clamping groove on the side close to the clamping moving block.

[0013] A method of using the above-mentioned anti-misoperation high-voltage grounding device, the method comprising: S1. Connect the grounding mechanism to the ground; S2. Hang the upper contact mechanism on the conductor so that the conductor is in the positioning groove; S3. Rotate the rotating hole to make the plate leave the tooth groove, so that the magnetic switch is opened and the lifting power is energized; S4. Start the lifting power to raise the lower contact mechanism to the position where the wire is clamped; S5. Rotate the rotating hole to allow the card plate to engage with the tooth groove, thereby closing the magnetic switch and cutting off the power to lift. S6. Begin maintenance on the high-voltage line. Repeat S3 after maintenance is completed. S7. Start the lifting power to lower the lower contact mechanism until the wire is completely released, then repeat S5. S8. Remove the entire clamp from the conductor.

[0014] This invention provides a device for preventing accidental disconnection of high-voltage grounding and its usage method, which has the following beneficial effects: 1. The upper contact mechanism 2 of the anti-misoperation high voltage grounding device of the present invention can be directly hung on the conductor during maintenance and will automatically position itself in the positioning groove 205 at the center position. When the personnel are maintaining the device, they can press the switch at the handle 405 position to start the lifting power 406 to raise the lower contact mechanism 3 until it fully clamps the conductor 1, which reduces the difficulty of operation for the personnel. 2. The lifting nut 404 of the anti-misoperation high-voltage grounding device in this invention is provided with a toothed disc 402. The locking plate 209 needs to be manually opened to energize the lifting power 406 and allow the lifting nut 404 to rotate. This adds a mechanism to prevent accidental disassembly and requires manual unlocking, thereby improving the safety of personnel during maintenance. 3. The grounding mechanism 5 is equipped with a signal control system. When the lower contact mechanism 3 clamps the conductor 1, the grounding mechanism 5 will be disconnected from the ground and will trigger an alarm to remind maintenance personnel. This prevents the grounding mechanism 5 from coming loose during maintenance and ensures that no one notices it, thus improving the safety of personnel during maintenance. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is an isometric view of the overall structure of the present invention; Figure 2 This is a front view of the wire clamp of the present invention; Figure 3 This is a cross-sectional view of the wire clamp of the present invention; Figure 4 This is a cross-sectional view of the grounding mechanism of the present invention; Figure 5 This is a diagram illustrating the clamping action of the wire clamp of the present invention; Figure 6 This is a partial cross-sectional view of the toothed disc of the card plate of the present invention; Figure 7 This is a structural diagram of the lower contact mechanism of the present invention.

[0016] In the diagram: Wire 1; Upper contact mechanism 2; Grounding connector 201; Guide groove 202; Upper contact seat 203; Conductive guide plate 204; Positioning groove 205; Rotating hole 206; Magnetic switch 207; Polygonal shaft 208; Clamping plate 209; Arc groove 210; Lower contact mechanism 3; Claw 301; Guide wheel 302; Anti-slip contact piece 303; Bottom guide wheel 304; Tension spring 305; Claw bracket 306; Guide plate 307; Limiting rod 308; Insulation mechanism 4; Lifting screw 401; Gear plate 402; Gear groove 403; Lifting nut 404; Handle 405; Lifting power 406; Clamping tooth 407; Grounding mechanism 5; Terminal block 501; Mounting plate 502; Clamping handle 503; Clamping groove 504; Clamping fixed block 505; Clamping moving block 506; Screw 507; Grounding wire 6; Wire clamp 7. Detailed Implementation

[0017] Example 1: like Figure 1-7 As shown, a high-voltage grounding device for preventing accidental disconnection includes a conductor 1 and a grounding mechanism 5. A wire clamp 7 is hung on the conductor 1, and a grounding wire 6 is provided between the wire clamp 7 and the grounding mechanism 5. An upper contact mechanism 2 is provided in the wire clamp 7, which is used to hold the conductor 1. An insulating mechanism 4 is connected below the upper contact mechanism 2, which is used for manual handling. A lower contact mechanism 3 is also provided inside the upper contact mechanism 2, which is used to clamp the conductor 1.

[0018] Preferred solutions such as Figure 1-3 In the middle, the upper contact mechanism 2 is hook-shaped, and the top of the upper contact mechanism 2 is provided with an arc groove 210. The vertically tangent side of the arc groove 210 is provided with a guide groove 202, and a ground wire connection seat 201 is provided on one side of the guide groove 202. The bottom of the upper contact mechanism 2 is also provided with a rotatable polygonal shaft 208, with rotating holes 206 fixed at both ends of the polygonal shaft 208, and a clamping plate 209 is also provided on the polygonal shaft 208.

[0019] Preferred solutions such as Figure 1-3 In the circular arc groove 210, a conductive guide plate 204 is provided at the center of the inner arc, and a positioning groove 205 is provided at the center of the conductive guide plate 204.

[0020] During the maintenance process, the grounding mechanism 5 is grounded to the ground first, and then the upper contact mechanism 2 is hung on the wire 1. The conductive guide plate 204 on the upper contact mechanism 2 will allow the wire 1 to slide into the positioning groove 205 and automatically center. The internal circuit of the conductive guide plate 204 is connected to the ground wire connection seat 201. The card plate 209 is equipped with a magnetic switch 207 at its tail end.

[0021] Preferred solutions such as Figure 1-3In the middle, the insulating mechanism 4 is located below the upper contact mechanism 2 and is fixedly connected to the upper contact mechanism 2. The insulating mechanism 4 is provided with a lifting power 406 on the side below the rotating hole 206. A lifting nut 404 is provided in the middle of the insulating mechanism 4, and a handle 405 is also provided on the side of the insulating mechanism 4 opposite to the lifting power 406.

[0022] The upper end of the handle 405 is equipped with a button to start the lifting power 406. After the wire clamp 7 is manually hung, the rotating hole 206 is rotated to open the card plate 209, so that the magnetic switch 207 at its tail end is disconnected, allowing the lifting power 406 to be powered on. Pressing the button will start the lifting power 406. The lifting power 406 can only be powered on when the magnetic switch 207 is disconnected. When closed, the card plate 209 is engaged in the tooth groove 403, and the lifting power 406 is de-energized to prevent the lifting power 406 from starting when the card plate 209 is engaged in the tooth groove 403, which would cause the device to overload.

[0023] Preferred solutions such as Figure 6-7 In the middle, a toothed disc 402 is provided above the lifting nut 404, a toothed groove 403 is provided on the circumferential surface of the lifting nut 404 below the toothed disc 402, and a lifting screw 401 is coaxially provided inside the lifting nut 404; The toothed disc 402 has evenly distributed teeth 407 around its circumference, and the front end of the clamping plate 209 engages with the teeth 407.

[0024] After the lifting power 406 is activated, the lifting nut 404 is driven to rotate, causing the lifting screw 401 to rise.

[0025] Preferred solutions such as Figure 6-7 In the lower contact mechanism 3, the gripper bracket 310 is fixed to one end of the lifting screw 401. The gripper bracket 310 has a gripper 301 movably mounted on the left side. The top of the gripper 301 is provided with a guide wheel 302. The gripper 301 below the guide wheel 302 has an anti-slip contact piece 303 on one side. The gripper bracket 310 has a mechanism on the right side that is the same as the one on the left side. A tension spring 305 is provided between the symmetrical grippers 301 on both sides, and a limit rod 308 is also provided on the gripper brackets 310 at both ends of the tension spring 305.

[0026] The lifting screw 401 rises, causing the gripper bracket 306 above it to rise, and the guide wheel 302 on the top of the gripper 301 above it to roll on the upper contact mechanism 210, eventually causing the two grippers 301 on both sides to close towards the center and clamp the wire 1.

[0027] Preferred solutions such as Figure 1 , 5In the middle, a terminal block 501 is fixedly provided on the top of the grounding mechanism 5, a mounting plate 502 is fixedly provided below the terminal block 501, a clamping block 505 is fixedly provided below the mounting plate 502, and a clamping moving block 506 is movably provided on one side of the clamping block 505. The clamping moving block 506 is connected to the clamping fixed block 505 via a screw 507. One end of the screw 507 is provided with a clamping handle 503, and the clamping fixed block 505 is provided with a clamping groove 504 on the side close to the clamping moving block 506.

[0028] The grounding mechanism 5 is equipped with a signal transmitting device to send a grounded signal to the lifting power 406. The lifting power 406 can only be started when the grounding device remains grounded. Example 2: To further illustrate with reference to Embodiment 1, a method for using the above-mentioned anti-misoperation high-voltage grounding device is provided, the method comprising: S1. Connect the grounding mechanism 5 to the ground; S2. Hang the upper contact mechanism 2 on the wire 1 so that the wire 1 is in the positioning groove 205; S3. Rotate the rotating hole 206 to make the card plate 209 leave the tooth groove 402, so that the magnetic switch 207 is opened and the lifting power 406 is powered on. S4. Start the lifting power 406 to raise the lower contact mechanism 3 to the position of clamping the wire 1; S5. Rotate the rotating hole 206 to allow the card plate 209 to engage with the tooth groove 402, thereby closing the magnetic switch 207 and cutting off the power to the lifting power 406. S6. Begin maintenance on the high-voltage line. Repeat S3 after maintenance is completed. S7. Start the lifting power 406 to lower the lower contact mechanism 3 until the wire 1 is completely released, then repeat S5. S8. Remove the entire clamp 7 from the wire 1.

[0029] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be defined as the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A high-voltage grounding device for preventing accidental removal, comprising a conductor (1) and a grounding mechanism (5), wherein a clamp (7) is hung on the conductor (1), and a grounding wire (6) is provided between the clamp (7) and the grounding mechanism (5), characterized in that: The clamp (7) is provided with an upper contact mechanism (2), which is used to hold the wire (1). An insulation mechanism (4) is connected below the upper contact mechanism (2), which is used for manual hand holding. The upper contact mechanism (2) is also provided with a lower contact mechanism (3), which is used to clamp the wire (1). The upper contact mechanism (2) is hook-shaped, and the top of the upper contact mechanism (2) is provided with an arc groove (210). A guide groove (202) is provided on the vertically tangent side of the arc groove (210), and a ground wire connection seat (201) is provided on one side of the guide groove (202). The bottom of the upper contact mechanism (2) is also provided with a rotatable polygonal shaft (208), and the two ends of the polygonal shaft (208) are fixed with rotating holes (206). The polygonal shaft (208) is also provided with a clamping plate (209). The inner arc center of the arc groove (210) is provided with a conductive guide plate (204), and the center of the conductive guide plate (204) is provided with a positioning groove (205). The card plate (209) is equipped with a magnetic switch (207) at its tail end.

2. The high-voltage grounding device for preventing accidental disconnection according to claim 1, characterized in that: The insulating mechanism (4) is located below the upper contact mechanism (2) and is fixedly connected to the upper contact mechanism (2). The insulating mechanism (4) is provided with a lifting power (406) on the side below the rotating hole (206). A lifting nut (404) is provided in the middle of the insulating mechanism (4), and a handle (405) is also provided on the side of the insulating mechanism (4) opposite to the lifting power (406).

3. The high-voltage grounding device for preventing accidental disconnection according to claim 2, characterized in that: The lifting nut (404) is provided with a toothed disc (402) above it, and a toothed groove (403) is provided on the circumferential surface of the lifting nut (404) below the toothed disc (402). The lifting nut (404) is provided with a lifting screw (401) coaxially inside. The toothed disc (402) has teeth (407) evenly distributed around its circumference, and the front end of the clamping plate (209) meshes with the teeth (407).

4. The high-voltage grounding device for preventing accidental disconnection according to claim 3, characterized in that: The gripper bracket (310) in the lower contact mechanism (3) is fixed to one end of the lifting screw (401). The gripper bracket (310) has a gripper (301) movably mounted on the left side. The top of the gripper (301) is provided with a guide wheel (302). The gripper (301) below the guide wheel (302) has an anti-slip contact piece (303) on one side. The gripper bracket (310) has a mechanism symmetrically mounted on the right side that is the same as the left side. A tension spring (305) is provided between the grippers (301) on both sides of the symmetrical sides, and a limit rod (308) is also provided on the gripper bracket (310) at both ends of the tension spring (305).

5. The high-voltage grounding device for preventing accidental disconnection according to claim 1, characterized in that: The grounding mechanism (5) has a terminal block (501) fixed on top, a mounting plate (502) fixed below the terminal block (501), a clamping block (505) fixed below the mounting plate (502), and a clamping moving block (506) movably mounted on one side of the clamping block (505). The clamping moving block (506) is connected to the clamping fixed block (505) via a screw (507). One end of the screw (507) is provided with a clamping handle (503), and the clamping fixed block (505) is provided with a clamping groove (504) on the side close to the clamping moving block (506).

6. The method of using the anti-misoperation high-voltage grounding device according to any one of claims 1-5, characterized in that: The method includes: S1. Connect the grounding mechanism (5) to the ground; S2. Hang the upper contact mechanism (2) on the wire (1) so that the wire (1) is in the positioning groove (205); S3. Rotate the rotating hole (206) to make the card plate (209) leave the tooth groove (403), so that the magnetic switch (207) is turned on and the lifting power (406) is powered on; S4. Start the lifting power (406) to raise the lower contact mechanism (3) to the position of clamping the wire (1). S5. Rotate the rotating hole (206) to allow the card plate (209) to engage with the tooth groove (403), thereby closing the magnetic switch (207) and cutting off the power to the lifting power (406); S6. Begin maintenance on the high-voltage line. Repeat S3 after maintenance is completed. S7. Start the lifting power (406) to lower the lower contact mechanism (3) until the wire (1) is completely released, and then repeat S5. S8. Remove the entire clamp (7) from the wire (1).

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