A disassembly-free on-off device for measuring grounding resistance of power system towers

Abstract

A disassembly-free on-off device for measuring the grounding resistance of a power system tower relates to a disassembly-free on-off device for measuring the grounding resistance, wherein a slider (20) capable of sliding up and down is provided in a cavity, a metal rod (17) flush with the two ends of the through hole (26) is passed through a through hole (26), one end of each of the two rod bodies (2) extends into the cavity from opposite side walls of a shell, and an inclined surface B (32) inclined upward is provided at the ends of the two rod bodies (2) located in the cavity, and the two inclined surfaces B (32) are respectively clearance-matched with the two ends of the metal rod (17); the present invention uses a screw rod A to adjust the slider supported and lifted up by a spring to move up and down, so that the inverted trapezoidal block provided on the top of the slider and the inclined surfaces inclined upward provided on the ends of the two rod bodies contact and separate, thereby achieving the purpose of having a firm holding force and a large contact area when the inclined surfaces contact each other, and not being prone to false contact and sparking.

Description

Technical Field

[0001] The invention relates to a disassembly-free on-off device for measuring grounding resistance, and in particular to a disassembly-free on-off device for measuring grounding resistance of a power system tower, so as to realize rapid measurement of grounding resistance without disassembling grounding bolts. Background Art

[0002] Transmission line tower grounding systems are essential infrastructure for lightning protection. Tower grounding grids for AC and DC overhead transmission lines of varying voltage levels all utilize conductive grounding grids as discharge paths for lightning currents or short-circuit surges. A complete tower grounding grid consists of a grounding body buried in the soil, a grounding down conductor connecting the tower foot to the buried grounding body, and a small number of auxiliary grounding resistance-reduction materials, such as grounding resistance-reduction modules and resistance-reduction agents. The function of the grounding down conductor is to allow lightning current to flow rapidly into the grounding grid through the tower itself and the grounding down conductor after lightning strikes the lightning conductor, thereby protecting the overhead transmission line from overvoltage.

[0003] For a long time, ground resistance has been a key indicator of the lightning protection performance of the grounding grid on transmission line towers. Conducting ground resistance measurements is a fundamental part of line maintenance. Currently, overhead transmission line maintenance requires regular ground resistance measurements of the tower grounding grid. This measurement requires disconnecting the tower from the grounding down conductor. Because the grounding down conductor is installed close to the tower, removing it is difficult, especially when the connecting bolts are rusted. Some departments even use cement or paint to cover the down conductor bolt connection points to prevent them from falling off. After measuring the ground resistance of the overhead transmission line tower, the down conductor must be reconnected to the tower foot. This places a significant workload on grassroots maintenance departments for ground resistance testing. In order to improve the detection efficiency of the grounding resistance of overhead transmission line towers and reduce the detection labor intensity, it is necessary to design a new type of grounding down conductor connection device. The new type of grounding down conductor connection device requires: tight, safe and reliable contact, and is not prone to "false connection". It can realize the measurement of the grounding resistance of overhead transmission line towers while minimizing the frequent bolt disassembly and installation processes. Summary of the Invention

[0004] In order to overcome the shortcomings of the background technology, the present invention discloses a disassembly-free on-off device for measuring the grounding resistance of a power system tower. The screw A is used to adjust the up and down movement of a slider supported by a spring, so that the inverted trapezoidal block provided on the top of the slider and the inclined surfaces inclined upward provided on the ends of the two rod bodies contact and separate, thereby achieving the purpose of the inclined surfaces contacting with each other with a firm holding force and a large contact area, and not prone to false contact and sparking.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] The utility model discloses a non-disassembly on-off device for measuring the grounding resistance of a power system tower, comprising a shell, a cavity provided in the shell, a slider capable of sliding up and down provided in the cavity, an inverted trapezoidal block provided on the top of the slider, a through hole parallel to the two bottom surfaces of the inverted trapezoidal block provided between the middle parts of the two inclined surfaces A provided in the inverted trapezoidal block, a metal rod flush with the two mouths of the through hole passed through the through hole, a through hole A provided in the middle position of the bottom of the shell, the screw rod A passes through the through hole A and is fixedly connected to the blind screw hole A provided at the bottom of the slider, upwardly extending columns are provided at the bottom of the cavity on both sides of the screw rod A, blind holes are provided at positions corresponding to the bottom of the slider and the columns, a spring is provided between the columns and the blind holes, each end of the two rod bodies extends into the cavity from the opposite side walls of the shell, and the ends of the two rod bodies located in the cavity are provided with inclined surfaces B inclined obliquely upward, and the two inclined surfaces B are respectively clearance-matched with the two ends of the metal rod.

[0007] The non-disassembly on-off device for measuring the grounding resistance of a power system tower comprises a shell including an upper cover and a box body, an upper trough body is provided at the bottom of the upper cover, and a lower trough body is provided at the top of the box body. When the upper cover and the box body are buckled together, the upper trough body and the lower trough body are connected to form a cavity.

[0008] The disassembly-free on-off device for measuring the grounding resistance of power system towers is provided with a dividing groove A between the upper trough body and the upper cover on both sides, a semicircular through groove A is provided between the two dividing grooves A and the upper trough body, a square through groove A is provided between the two dividing grooves A and the two sides of the upper cover, a dividing groove B is provided between the lower trough body and the two sides of the box body, a semicircular through groove B is provided between the two dividing grooves B and the lower trough body, and a square through groove B is provided between the two dividing grooves B and the two sides of the box body, and a plane is provided on the two rod bodies. After the upper cover and the box body are buckled together, the two semicircular through grooves A and the two semicircular through grooves B form two circular holes to clamp the two rod bodies, and the two square through grooves A and the two square through grooves B form two square holes to clamp the two planes provided on both rod bodies.

[0009] The disassembly-free on-off device for measuring the grounding resistance of a power system tower is provided with through holes B at the four corners of the box body and blind screw holes B at the four corners of the upper cover. The upper ends of the four screws B pass through the four through holes B respectively and are fixed to the four blind screw holes B.

[0010] The disassembly-free on-off device for measuring the grounding resistance of a power system tower is provided with an expanded diameter B at the lower end of each of the four through-holes B, and the bolt heads B respectively provided at the lower ends of the four screws B are located within the four expanded diameters B.

[0011] The disassembly-free on-off device for measuring the grounding resistance of a power system tower is provided with a connecting plate at each other end of the two rod bodies, and the two connecting plates are provided with connecting holes.

[0012] The disassembly-free on-off device for measuring the grounding resistance of a power system tower is provided with a pin hole in the middle position of the top of the cavity, the top block is located in the cavity between the inverted trapezoidal block and the shell, and a sliding rod is provided on the top of the top block. The sliding rod is slidably connected in the pin hole, and there is a gap between the top block and the top of the cavity, and the upper end of the sliding rod is flush with the top surface of the shell.

[0013] The disassembly-free on-off device for measuring the grounding resistance of a power system tower is provided with an expansion diameter A at the lower end of the through hole A, and a bolt head A is provided at the lower end of the screw A, and the bolt head A is placed in the expansion diameter A.

[0014] In the disassembly-free on-off device for measuring the grounding resistance of a power system tower, the upper end of the spring is located in the blind hole, and the lower end of the spring is slidably sleeved on the column.

[0015] The non-disassembly switching device for measuring the grounding resistance of a power system tower is made of copper, the rod body is made of metal, and the shell and the slider are both made of insulating materials.

[0016] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0017] The disassembly-free on-off device for measuring the grounding resistance of a power system tower described in the present invention utilizes a screw rod A to adjust the up and down movement of a slider supported by a spring, so that the inverted trapezoidal block provided on the top of the slider and the inclined surfaces inclined upward provided on the ends of the two rod bodies contact and separate, thereby achieving the purpose of having a firm holding force and a large contact area when the inclined surfaces contact each other, and not being prone to false contact and sparking; the present invention has a compact structure, strong practicality, good use effect, has promotion value, and has broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 Left view of;

[0020] Figure 3 for Figure 1 Bottom view of

[0021] Figure 4 Schematic diagram of the internal structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the assembly structure of the present invention;

[0023] Figure 6 It is a structural schematic diagram when the present invention is used.

[0024] In the figure: 1. connecting plate; 2. rod body; 3. upper cover; 4. sliding rod; 5. box body; 6. connecting hole; 7. bolt head A; 8. expansion A; 9. expansion B; 10. bolt head B; 11. plane; 12. separation groove A; 13. upper tank body; 14. pin hole; 15. top block; 16. inverted trapezoidal block; 17. metal rod; 18. separation groove B; 19. lower tank body; 20. slider; 21. through hole A; 22. column; 23. screw A; 24. spring; 25. blind screw hole A; 26. through hole; 27. blind screw hole B; 28. square groove A; 29. ​​semicircular groove A; 30. inclined surface A; 31. blind hole; 32. inclined surface B; 33. screw B; 34. through hole B; 35. square groove B; 36. semicircular groove B. Implementation Method

[0025] The present invention can be explained in more detail by the following examples. The present invention is not limited to the following examples. The purpose of the disclosure is to protect all changes and improvements within the scope of the present invention.

[0026] Combined with attachment Figures 1 to 5The disassembly-free on-off device for measuring the grounding resistance of a power system tower comprises a shell, a cavity is provided in the shell, a slider 20 capable of sliding up and down is provided in the cavity, an inverted trapezoidal block 16 is provided on the top of the slider 20, a through hole 26 parallel to the two bottom surfaces of the inverted trapezoidal block 16 is provided between the middle parts of the two inclined surfaces A30 provided on the inverted trapezoidal block 16, a metal rod 17 flush with the two mouths of the through hole 26 is passed through the through hole 26, a through hole A21 is provided in the middle position of the bottom of the shell, a screw A23 passes through the through hole A21 and is fixedly connected to the blind screw hole A25 provided at the bottom of the slider 20, upwardly extending columns 22 are provided at the bottom of the cavity on both sides of the screw A23, a blind hole 31 is provided at the bottom of the slider 20 and at the position corresponding to the column 22, and a through hole 31 is provided at the vertical position. A spring 24 is provided between the column 22 and the blind hole 31. Each end of the two rod bodies 2 extends into the cavity from the opposite side walls of the shell. The ends of the two rod bodies 2 located in the cavity are provided with inclined surfaces B32 inclined obliquely upward. The two inclined surfaces B32 are respectively clearance-matched with the two ends of the metal rod 17. A connecting plate 1 is provided at the other end of each of the two rod bodies 2. A connecting hole 6 is provided on the two connecting plates 1. The shell includes an upper cover 3 and a box body 5. An upper groove body 13 is provided at the bottom of the upper cover 3, and a lower groove body 19 is provided at the top of the box body 5. After the upper cover 3 and the box body 5 are buckled together, the upper groove body 13 and the lower groove body 19 are connected to form a cavity. A separation groove A12 is provided between the upper groove body 13 and both sides of the upper cover 3, and a semicircular through groove A29 is provided between the two separation grooves A12 and the upper groove body 13. A square through groove A28 is provided between the two dividing grooves A12 and both sides of the upper cover 3, a dividing groove B18 is provided between the lower trough body 19 and both sides of the box body 5, a semicircular through groove B36 is provided between the two dividing grooves B18 and the lower trough body 19, a square through groove B35 is provided between the two dividing grooves B18 and both sides of the box body 5, and a plane 11 is provided on both rod bodies 2. After the upper cover 3 and the box body 5 are buckled together, the two semicircular through grooves A29 and the two semicircular through grooves B36 form two round holes to clamp the two rod bodies 2, and the two square through grooves A28 and the two square through grooves B35 form two square holes to clamp the two planes 11 provided on both rod bodies 2. A through hole B34 is provided at the four corners of the box body 5, and a blind screw hole B27 is provided at the four corners of the upper cover 3. The upper ends of the four screws B33 pass through the four through holes respectively. B34 is fixed to the four blind screw holes B27, and an expanded diameter B9 is provided at the lower end of the four through-holes B34. The bolt heads B10 provided at the lower ends of the four screws B33 are all located in the four expanded diameters B9. A pin hole 14 is provided in the middle position of the top of the cavity. The top block 15 is located in the cavity between the inverted trapezoidal block 16 and the shell. A sliding rod 4 is provided on the top of the top block 15, and the sliding rod 4 is slidably connected in the pin hole 14. An expanded diameter A8 is provided at the lower end of the through-hole A21, and a bolt head A7 is provided at the lower end of the screw A23, and the bolt head A7 is placed in the expanded diameter A8. The upper end of the spring 24 is located in the blind hole 31, and the lower end of the spring 24 is slidably sleeved on the column 22. The metal rod 17 is made of copper, the rod body 2 is made of metal, and the shell and the slider 20 are both made of insulating materials.

[0027] The non-disassembly on-off device for measuring the grounding resistance of a power system tower according to the present invention is implemented. When in use, one of the connecting plates 1 is connected to the tower using the connecting hole 6 provided thereon, and the other connecting plate 1 is connected to the grounding down conductor using the connecting hole 6 provided thereon. In daily use, the metal rod 17 is in close contact with the inclined surfaces A30 at both ends thereof and the inclined surfaces B32 provided on both rod bodies 2 under the pulling of the screw A23. The tower and the grounding down conductor are in a connected state, and the spring 24 is in a tightened state. When the grounding resistance of the tower needs to be measured and the connection between the tower and the grounding down conductor is disconnected, the attached Figure 6 , turn the bolt head A7 provided on the screw A23 to gradually disengage the screw A23 from the blind screw hole A25. At this time, the spring 24 gradually releases its elastic force, causing the slider 20 to gradually move upward in the cavity. The upward movement of the slider 20 drives the upward movement of the inverted trapezoidal block 16, thereby gradually separating the two ends of the metal rod 17 from the two rod bodies 2. When the distance between the two ends of the metal rod 17 and the two rod bodies 2 reaches a safe distance, stop turning the screw A23. At this time, the upward movement of the inverted trapezoidal block 16 gradually reduces the gap between the top block 15 and the top of the cavity, and the upper end of the sliding rod 4 gradually extends out of the pin hole 14. The screw A23 The operator begins to measure the grounding resistance because the metal rod 17 is not completely separated from the blind screw hole A25. After the measurement is completed, the bolt head A7 provided on the screw A23 is turned to gradually extend the screw A23 into the blind screw hole A25 until the two ends of the metal rod 17 are in close contact with the two rod bodies 2. The grounding resistance measurement is completed once. The purpose of extending the sliding rod 4 out of the pin hole 14 when the two ends of the metal rod 17 are disconnected from the two rod bodies 2 is to prevent the operator from forgetting to closely contact the two ends of the metal rod 17 with the two rod bodies 2 after measuring the grounding resistance. The extended sliding rod 4 serves as a reminder.

[0028] The parts not described in detail in this invention are prior art.

Claims

1. A disassembly-free on-off device for measuring the grounding resistance of a power system tower, characterized by: The invention comprises a shell, a cavity is provided in the shell, a slider (20) capable of sliding up and down is provided in the cavity, an inverted trapezoidal block (16) is provided on the top of the slider (20), a through hole (26) parallel to the two bottom surfaces of the inverted trapezoidal block (16) is provided between the middle parts of the two inclined surfaces A (30) provided on the inverted trapezoidal block (16), a metal rod (17) flush with the two ends of the through hole (26) is passed through the through hole (26), a through hole A (21) is provided in the middle position of the bottom of the shell, and a screw rod A (23) passes through the through hole A (21) and is connected to a blind screw rod provided at the bottom of the slider (20). The hole A (25) is fixed, and upwardly extending columns (22) are provided at the bottom of the cavity on both sides of the screw A (23), a blind hole (31) is provided at the bottom of the slider (20) and at a position corresponding to the column (22), and a spring (24) is provided between the column (22) and the blind hole (31), and one end of each of the two rod bodies (2) extends into the cavity from the opposite side walls of the shell, and the ends of the two rod bodies (2) located in the cavity are provided with inclined surfaces B (32) inclined obliquely upward, and the two inclined surfaces B (32) are respectively clearance-matched with the two ends of the metal rod (17); A pin hole (14) is provided in the middle of the top of the cavity. The top block (15) is located in the cavity between the inverted trapezoidal block (16) and the shell. A sliding rod (4) is provided on the top of the top block (15). The sliding rod (4) is slidably connected in the pin hole (14). There is a gap between the top block (15) and the top of the cavity. The upper end of the sliding rod (4) is flush with the top surface of the shell.

2. The disassembly-free on-off device for measuring the grounding resistance of a power system tower according to claim 1 is characterized in that: The shell comprises an upper cover (3) and a box body (5), an upper groove body (13) is provided at the bottom of the upper cover (3), and a lower groove body (19) is provided at the top of the box body (5); when the upper cover (3) and the box body (5) are buckled together, the upper groove body (13) and the lower groove body (19) are connected to form a cavity.

3. The disassembly-free on-off device for measuring the grounding resistance of a power system tower according to claim 2 is characterized in that: A separation groove A (12) is provided between the upper trough body (13) and the upper cover (3) on both sides, a semi-circular through groove A (29) is provided between the two separation grooves A (12) and the upper trough body (13), a square through groove A (28) is provided between the two separation grooves A (12) and the upper cover (3) on both sides, a separation groove B (18) is provided between the lower trough body (19) and the box body (5), and a semi-circular through groove A (29) is provided between the two separation grooves B (18) and the lower trough body (19). Groove B (36), a square through groove B (35) is provided between the two separating grooves B (18) and the two sides of the box body (5), and a plane (11) is provided on both rod bodies (2). After the upper cover (3) and the box body (5) are buckled together, the two semicircular through grooves A (29) and the two semicircular through grooves B (36) form two circular holes to clamp the two rod bodies (2), and the two square through grooves A (28) and the two square through grooves B (35) form two square holes to clamp the two planes (11) provided on both rod bodies (2).

4. The disassembly-free on-off device for measuring the grounding resistance of a power system tower according to claim 2, characterized in that: The box body (5) is provided with through holes B (34) at the four corners, and the upper cover (3) is provided with blind screw holes B (27) at the four corners. The upper ends of the four screws B (33) pass through the four through holes B (34) and are fixed to the four blind screw holes B (27).

5. The disassembly-free on-off device for measuring the grounding resistance of a power system tower according to claim 4 is characterized in that: The lower ends of the four through holes B (34) are each provided with an expanded diameter B (9), and the bolt heads B (10) respectively provided at the lower ends of the four screw rods B (33) are each located within the four expanded diameters B (9).

6. The disassembly-free on-off device for measuring the grounding resistance of a power system tower according to claim 1 is characterized in that: A connecting plate (1) is provided at each other end of the two rod bodies (2), and a connecting hole (6) is provided on each of the two connecting plates (1).

7. The disassembly-free on-off device for measuring the grounding resistance of a power system tower according to claim 1 is characterized in that: The lower end of the through hole A (21) is provided with an expanded diameter A (8), and the lower end of the screw rod A (23) is provided with a bolt head A (7), and the bolt head A (7) is placed in the expanded diameter A (8).

8. The disassembly-free on-off device for measuring the grounding resistance of a power system tower according to claim 1 is characterized in that: The upper end of the spring (24) is located in the blind hole (31), and the lower end of the spring (24) is slidably sleeved on the column (22).

9. The disassembly-free on-off device for measuring the grounding resistance of a power system tower according to claim 1, characterized in that: The material of the metal rod (17) is copper, the material of the rod body (2) is metal, and the material of the shell and the slider (20) are both insulating materials.

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