CN220455363U

CN220455363U - Disassembly-free on-off device for measuring grounding resistance of pole tower of power system

Info

Publication number: CN220455363U
Application number: CN202321588528.6U
Authority: CN
Inventors: 金小六; 曹盈; 金宝林; 王建红
Original assignee: Henan Shenghuang Electric Power Equipment Co ltd
Current assignee: Henan Shenghuang Electric Power Equipment Co ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2024-02-06
Anticipated expiration: 2033-06-21

Abstract

A disassembly-free on-off device for measuring grounding resistance of a pole tower of an electric power system relates to a disassembly-free on-off device for measuring grounding resistance, wherein a sliding block (20) capable of sliding up and down is arranged in a cavity, a metal rod (17) flush with two opening parts of the through hole (26) is penetrated in the through hole (26), one ends of two pole bodies (2) extend into the cavity from the opposite side walls of a shell respectively, inclined planes B (32) inclined towards the obliquely upper direction are arranged at the end parts of the two pole bodies (2) positioned in the cavity, and the two inclined planes B (32) are in clearance fit with the two ends of the metal rod (17) respectively; according to the utility model, the sliding block supported and jacked by the spring is adjusted to move up and down by the screw A, so that the inverted trapezoidal block arranged at the top of the sliding block and inclined planes which are obliquely upwards arranged at the ends of the two rod bodies are contacted and separated, and the purposes that the inclined planes are contacted with the inclined planes to have firm holding force, the contact area is large, and virtual connection ignition is difficult are realized.

Description

Disassembly-free on-off device for measuring grounding resistance of pole tower of power system

Technical Field

The utility model relates to a disassembly-free on-off device for measuring grounding resistance, in particular to a disassembly-free on-off device for measuring the grounding resistance of a pole tower of an electric power system, which is used for realizing rapid measurement of the grounding resistance on the premise of non-disassembly of a ground wire bolt.

Background

The grounding device of the transmission line tower is the most main infrastructure for realizing lightning disaster protection of the power line, and the grounding grids of the transmission line tower of the alternating current and direct current overhead transmission lines with different voltage levels are all grounding grids formed by conductors to be used as lightning current or short-circuit impulse current discharging channels. The complete pole tower grounding grid includes: the grounding body buried in the soil, the grounding down-lead of the connecting rod tower foot and the buried grounding body, and a few auxiliary grounding resistance reducing materials, such as materials of a grounding resistance reducing module, a resistance reducing agent and the like. The grounding down-lead has the function that after lightning strikes the lightning conductor, lightning current can quickly flow into the grounding grid through the tower and the grounding down-lead, so that overvoltage safety of the overhead transmission line is protected.

For a long time, the grounding resistance is an important index for measuring the lightning protection performance of the grounding network of the transmission line tower, and the ground resistance grounding measurement is one of the basic operation and maintenance works of the line. In the operation and maintenance process of the existing overhead transmission line, the grounding resistance of the grounding grid of the pole tower of the overhead transmission line needs to be measured regularly, and the connection between the pole tower and the grounding down conductor needs to be disconnected during measurement. Because the grounding down conductor is tightly attached to the tower body, the difficulty of detaching the grounding down conductor is high, especially the difficulty of detaching the grounding down conductor is increased after the connecting bolt is rusted, and even departments use cement or paint for coating the connecting point of the grounding down conductor in order to prevent falling. After the measurement of the grounding resistance of the pole tower of the overhead transmission line is finished, the down conductor is required to be reconnected to the tower foot. And great disassembly and assembly workload is brought to the ground resistance detection work of the basic unit operation and maintenance department. In order to improve the detection efficiency of overhead transmission line tower grounding resistance and reduce detection intensity of labour, it is necessary to design a novel grounding down-lead connecting device, and this novel grounding down-lead connecting device requires: the contact is tight, safe and reliable, the virtual connection condition is not easy to occur, and the measurement of the grounding resistance of the pole tower of the overhead transmission line can be realized on the premise of reducing frequent procedures of dismounting and mounting bolts as much as possible.

Disclosure of Invention

In order to overcome the defects in the background art, the utility model discloses a disassembly-free on-off device for measuring the grounding resistance of a pole tower of an electric power system, wherein a screw A is utilized to adjust a sliding block supported and jacked by a spring to move up and down, so that an inverted trapezoidal block arranged at the top of the sliding block and inclined planes which are obliquely upwards arranged at the ends of two pole bodies are contacted and separated, and the purposes that the inclined planes are firmly supported by the contact force, the contact area is large, and virtual connection and ignition are difficult are realized.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:

a disassembly-free on-off device for measuring grounding resistance of a pole tower of an electric power system comprises a shell, a cavity is arranged in the shell, a sliding block capable of sliding up and down is arranged in the cavity, an inverted trapezoidal block is arranged at the top of the sliding block, through holes parallel to two bottom surfaces of the inverted trapezoidal block are arranged between the middle parts of two inclined planes A arranged on the inverted trapezoidal block, metal rods flush with two opening parts of the through holes are penetrated into the through holes, a through hole A is arranged in the middle position of the bottom of the shell, a screw A penetrates through the through hole A and is fixedly connected with blind screw holes A arranged on the bottom of the sliding block, upright posts extending upwards are arranged at the bottoms of the cavities on two sides of the screw A, blind holes are arranged at positions corresponding to the bottoms of the sliding block and the upright posts, springs are arranged between the upright posts and the blind holes, one ends of the two rod bodies extend into the cavity from opposite side walls of the shell respectively, inclined planes B sloping upwards are arranged at the end parts of the two rod bodies positioned in the cavity, and are in clearance fit with the two ends of the metal rods respectively.

The disassembly-free on-off device for measuring the grounding resistance of the power system pole tower comprises a shell, wherein the shell comprises an upper cover and a box body, an upper groove body is arranged at the bottom of the upper cover, a lower groove body is arranged at the top of the box body, and the upper groove body and the lower groove body are communicated to form a cavity after the upper cover and the box body are buckled.

A no-disassembly break-make device for electric power system shaft tower ground resistance measurement, all be equipped with separating groove A between the both sides of last cell body and upper cover, all be equipped with semicircle through groove A between two separating groove A and last cell body, all be equipped with square through groove A between the both sides of two separating groove A and upper cover, all be equipped with separating groove B between the both sides of lower cell body and box body, all be equipped with semicircle through groove B between two separating groove B and lower cell body, all be equipped with square through groove B between the both sides of two separating groove B and box body, all be equipped with the plane on two body of rod, two semicircle through groove A and two semicircle through groove B form two round hole centre gripping two body of rod after upper cover and the box body lock, two square through groove A and two square through groove B form two square holes to block the biplane that two body of rod all are equipped with.

The disassembly-free on-off device for measuring the grounding resistance of the pole tower of the power system is characterized in that through holes B are formed in four corners of the box body, blind screw holes B are formed in four corners of the upper cover, and the upper ends of four screw rods B are fixedly connected with the four blind screw holes B after penetrating through the four through holes B respectively.

The disassembly-free on-off device for measuring the grounding resistance of the pole tower of the power system is characterized in that the lower ends of the four through holes B are respectively provided with an expanding B, and bolt heads B respectively arranged at the lower ends of the four screw rods B are respectively positioned in the four expanding B.

The disassembly-free on-off device for measuring the grounding resistance of the power system pole tower is characterized in that connecting plates are arranged at the other ends of the two pole bodies, and connecting holes are formed in the two connecting plates.

A non-dismantling make-and-break device for electric power system shaft tower ground resistance measurement, be equipped with the pinhole in the intermediate position at cavity top, the kicking block is located the cavity between trapezoidal piece of falling and the casing, is equipped with the slide bar at the top of kicking block, slide bar sliding connection is in the pinhole, has the clearance between the top of kicking block and cavity, the upper end of slide bar and the top surface parallel and level of casing.

The disassembly-free on-off device for measuring the grounding resistance of the pole tower of the electric power system is characterized in that an expanding A is arranged at the lower end of the perforation A, a bolt head A is arranged at the lower end of the screw A, and the bolt head A is arranged in the expanding A.

The disassembly-free on-off device for measuring the grounding resistance of the power system tower is characterized in that the upper end of the spring is positioned in the blind hole, and the lower end of the spring is sleeved on the upright post in a sliding manner.

A exempt from to dismantle break-make device for electric power system shaft tower ground resistance measurement, the material of metal pole is red copper, the material of the body of rod is metal, the material of casing and slider is insulating material.

Due to the adoption of the technical scheme, the utility model has the following beneficial effects:

according to the disassembly-free on-off device for measuring the grounding resistance of the pole tower of the electric power system, the sliding block supported and jacked by the spring is adjusted to move up and down by the screw A, so that the inverted trapezoidal block arranged at the top of the sliding block is contacted with and separated from the inclined planes which are obliquely upwards arranged at the end parts of the two pole bodies, and the purposes that the inclined planes are firmly supported by the inclined planes and have large contact area and are difficult to be in virtual connection and strike fire are realized; the utility model has compact structure, strong practicability, good use effect, popularization value and wide market prospect.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a schematic view of the internal structure of the present utility model;

FIG. 5 is a schematic view of an assembled structure of the present utility model;

fig. 6 is a schematic view of the structure of the present utility model in use.

In the figure: 1. a connecting plate; 2. a rod body; 3. an upper cover; 4. a slide bar; 5. a case body; 6. a connection hole; 7. a bolt head A; 8. expanding the diameter A; 9. expanding the diameter B; 10. a bolt head B; 11. a plane; 12. a separation groove A; 13. an upper tank body; 14. a pin hole; 15. a top block; 16. inverted trapezoid blocks; 17. a metal rod; 18. a separation groove B; 19. a lower tank body; 20. a slide block; 21. perforating A; 22. a column; 23. a screw A; 24. a spring; 25. a blind screw hole A; 26. a through hole; 27. a blind screw hole B; 28. square through groove A; 29. a semicircular through groove A; 30. an inclined plane A; 31. a blind hole; 32. an inclined plane B; 33. a screw B; 34. perforating B; 35. square through groove B; 36. semicircular through groove B.

Description of the embodiments

The utility model will be explained in more detail by the following examples, which are not intended to limit the utility model thereto, and the purpose of the present utility model is to protect all changes and modifications within the scope of the utility model;

the disassembly-free on-off device for measuring the grounding resistance of the pole tower of the electric system comprises a shell, wherein a cavity is arranged in the shell, a sliding block 20 capable of sliding up and down is arranged in the cavity, an inverted trapezoid block 16 is arranged at the top of the sliding block 20, a through hole 26 parallel to two bottom surfaces of the inverted trapezoid block 16 is arranged between the middle parts of two inclined planes A30 arranged on the inverted trapezoid block 16, a metal rod 17 flush with two opening parts of the through hole 26 is penetrated in the through hole 26, a perforation A21 is arranged in the middle position of the bottom of the shell, a screw A23 penetrates through the perforation A21 and is fixedly connected with a blind screw hole A25 arranged at the bottom of the sliding block 20, upright posts 22 extending upwards are arranged at the bottom of the cavity at two sides of the screw A23, a blind hole 31 is arranged at the positions corresponding to the bottom of the sliding block 20 and the upright posts 22, a spring 24 is arranged between the upright posts 22 and the blind holes 31, one ends of the two rod bodies 2 extend into the cavity from two opposite side walls of the shell respectively, the end parts of the two rod bodies 2 positioned in the cavity are respectively provided with an inclined plane B32 which inclines obliquely upwards, the two inclined planes B32 are respectively in clearance fit with the two ends of the metal rod 17, the other ends of the two rod bodies 2 are respectively provided with a connecting plate 1, the two connecting plates 1 are respectively provided with a connecting hole 6, the shell comprises an upper cover 3 and a box body 5, the bottom of the upper cover 3 is provided with an upper groove body 13, the top of the box body 5 is provided with a lower groove body 19, the upper groove body 13 and the lower groove body 19 are communicated to form the cavity after the upper cover 3 and the box body 5 are buckled, separation grooves A12 are respectively arranged between the two sides of the upper groove body 13 and the upper cover 3, a semicircular through groove A29 is respectively arranged between the two separation grooves A12 and the upper groove body 13, a square through groove A28 is respectively arranged between the two separation grooves A12 and the two sides of the upper cover 3, a separation groove B18 is respectively arranged between the two sides of the lower groove body 19 and the box body 5, a semicircular through groove B36 is respectively arranged between the two separation grooves B18 and the lower groove body 19, square through grooves B35 are arranged between two separation grooves B18 and two sides of the box body 5, planes 11 are arranged on the two rod bodies 2, after the upper cover 3 and the box body 5 are buckled, two semicircular through grooves A29 and two semicircular through grooves B36 form two round holes to clamp the two rod bodies 2, the two square through grooves A28 and the two square through grooves B35 form two square holes to clamp the two planes 11 arranged on the two rod bodies 2, perforations B34 are arranged at four corners of the box body 5, blind screw holes B27 are arranged at four corners of the upper cover 3, the upper ends of four screw rods B33 are fixedly connected with the four blind screw holes B27 after penetrating through the four perforations B34 respectively, an expanding diameter B9 is arranged at the lower ends of the four perforations B34, the bolt heads B10 that four screw rods B33 lower extreme was equipped with respectively are all located four and expand footpath B9, be equipped with pinhole 14 in the intermediate position at cavity top, kicking block 15 is located the cavity between trapezoidal piece 16 of falling and the casing, be equipped with slide bar 4 at the top of kicking block 15, slide bar 4 sliding connection is in pinhole 14, be equipped with the hole A8 at the lower extreme of perforation A21, be equipped with bolt head A7 at the lower extreme of screw rod A23, bolt head A7 is arranged in hole A8, the upper end of spring 24 is located blind hole 31, the lower extreme of spring 24 is slided and is cup jointed on stand 22, the material of metal pole 17 is red copper, the material of the body of rod 2 is the metal, the material of casing and slider 20 is insulating material.

When the disassembly-free on-off device for measuring the grounding resistance of the pole tower of the electric power system is used, one connecting plate 1 is connected to the pole tower by using the connecting hole 6 arranged on the connecting plate, the other connecting plate 1 is connected with the grounding down-lead by using the connecting hole 6 arranged on the connecting plate, the metal pole 17 is tightly contacted with the inclined plane B32 which is respectively positioned on the two inclined planes A30 and arranged on the two pole bodies 2 by using the two ends of the metal pole 17 under the traction of the screw A23 in daily use, and the pole tower and the grounding down-lead are in a connection state, and the spring 24 is in a tightening state at the moment; when the connection between the tower and the ground lead is disconnected by measuring the grounding resistance of the tower, in combination with fig. 6, the bolt head A7 arranged on the screw A23 is screwed to gradually separate the screw A23 from the blind screw hole A25, at the moment, the spring 24 gradually releases the elastic force to gradually move the sliding block 20 upwards in the cavity, the upward movement of the sliding block 20 drives the upward movement of the inverted trapezoid block 16 to gradually separate 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, the screw A23 is stopped to be screwed, at the moment, the upward movement of the inverted trapezoid block 16 gradually reduces the gap between the top block 15 and the top of the cavity, the upper end of the sliding rod 4 gradually extends out of the pin hole 14, the screw A23 and the blind screw hole A25 are not completely separated, and an operator starts to measure the grounding resistance; after the measurement is finished, the bolt head A7 arranged on the screw A23 is screwed, the screw A23 gradually stretches 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 measurement of the grounding resistance can be finished once, the purpose that the sliding rod 4 stretches out of the pin hole 14 when the two ends of the metal rod 17 are disconnected with the two rod bodies 2 is to prevent an operator from forgetting to closely contact the two ends of the metal rod 17 with the two rod bodies 2 after the measurement of the grounding resistance, and the stretched sliding rod 4 plays a role in reminding.

The utility model is not described in detail in the prior art.

Claims

1. A exempt from to dismantle break-make device for electric power system shaft tower ground resistance measurement, characterized by: including the casing, be equipped with cavity in the casing, be equipped with slider (20) that can reciprocate in the cavity, be equipped with inverted trapezoid piece (16) at the top of slider (20), be equipped with between the middle part of two inclined planes A (30) that inverted trapezoid piece (16) were equipped with and inverted trapezoid piece (16) two bottom surfaces parallel through-hole (26), wear to have in through-hole (26) with two oral area parallel and level's metal pole (17) of through-hole (26), intermediate position at the casing bottom is equipped with perforation A (21), screw A (23) pass behind perforation A (21) and blind screw A (25) rigid coupling that slider (20) bottom was equipped with, all be equipped with stand (22) of upwards extending in the cavity bottom of screw A (23) both sides, be equipped with blind hole (31) in the corresponding position of bottom and stand (22) of slider (20), be equipped with spring (24) between stand (22) and blind hole (31), each one end of two body (2) stretches into in the cavity from the relative both sides wall of casing respectively, both ends that are located the cavity all are equipped with towards inclined plane B (32) respectively between inclined plane and two inclined plane B (32).

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

3. The disassembly-free on-off device for measuring the grounding resistance of the pole tower of the power system according to claim 2, wherein the disassembly-free on-off device is characterized in that: the two sides of the upper groove body (13) and the upper cover (3) are respectively provided with a separation groove A (12), two separation grooves A (12) and an upper groove body (13) are respectively provided with a semicircular through groove A (29), two separation grooves A (28) and two semicircular through grooves B (36), two separation grooves B (18) and a lower groove body (19) are respectively provided with a semicircular through groove B (36), two separation grooves B (18) and two sides of the box body (5) are respectively provided with a square through groove B (35), two rod bodies (2) are respectively provided with a plane (11), two semicircular through grooves A (29) and two semicircular through grooves B (36) form two round holes to clamp two rod bodies (2) after the upper cover (3) and the box body (5) are buckled, and two square through grooves A (28) and two square through grooves B (35) form two square holes to clamp two rod bodies (11) which are respectively provided with two rod bodies (2).

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

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

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

7. The disassembly-free on-off device for measuring the grounding resistance of the pole tower of the power system according to claim 1, wherein the disassembly-free on-off device is characterized in that: the middle position at cavity top is equipped with pinhole (14), and kicking block (15) are located the cavity between trapezoidal piece (16) of falling and the casing, are equipped with slide bar (4) at the top of kicking block (15), and slide bar (4) sliding connection is in pinhole (14), has the clearance between the top of kicking block (15) and cavity, and the upper end of slide bar (4) and the top surface parallel and level of casing.

8. The disassembly-free on-off device for measuring the grounding resistance of the pole tower of the power system according to claim 1, wherein the disassembly-free on-off device is characterized in that: an expanding A (8) is arranged at the lower end of the perforation A (21), a bolt head A (7) is arranged at the lower end of the screw rod A (23), and the bolt head A (7) is arranged in the expanding A (8).

9. The disassembly-free on-off device for measuring the grounding resistance of the pole tower of the power system according to claim 1, wherein the disassembly-free on-off device is characterized in that: the upper end of the spring (24) is positioned in the blind hole (31), and the lower end of the spring (24) is sleeved on the upright post (22) in a sliding way.

10. The disassembly-free on-off device for measuring the grounding resistance of the pole tower of the power system according to claim 1, wherein the disassembly-free on-off device is characterized in that: the metal rod (17) is made of red copper, the rod body (2) is made of metal, and the shell and the sliding block (20) are made of insulating materials.