Power transmission line overhead ground wire short circuit tool

Abstract

The utility model relates to a short-circuit tool for an overhead ground wire of a power transmission line, which is used for maintenance work of the power transmission line of 110kV and above, and comprises a wire clamp and a grounding clamp, an electrical loop is formed by connecting a short-circuit wire, the wire clamp adopts a U-shaped hook structure, an arc-shaped reed and a spring are arranged in the wire clamp, continuous and stable clamping force is provided, and the grounding clamp adopts a C-shaped structure. And an adjusting screw rod and a pressing tongue are arranged, so that reliable clamping and electrical connection are ensured. The wire clamp is convenient to operate, is operated through the insulating handle, is simple and easy to use, effectively shortens the short-circuit time of the overhead ground wire, improves the working efficiency, and reduces the labor intensity of operators. And meanwhile, the short-circuit wire adopts the soft copper wire, so that good conductivity is ensured. The tool has the characteristics of simple structure, portability, practicability, safety and reliability, and is suitable for wide power transmission line maintenance scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power transmission and transformation equipment maintenance, especially to an overhead ground wire shorting tool for power transmission lines. BACKGROUND

[0002] In recent years, with the rapid development of Qinghai power grid, the scale of power transmission lines has increased rapidly, and Qinghai is located in high-altitude, high-cold, and windy and other harsh environments. The overhead power transmission lines are exposed to the wild all year round, and are easily affected by the natural environment, leading to defects or hidden dangers in various types of main bodies, auxiliary facilities and their channel environment. Among them, the overhead ground wire defect is a common one, which usually manifests as loose strands, broken strands, ground wire anti-vibration hammer displacement, ground wire clamp inclination, corrosion of hardware split pin and bolt nut, improper installation or loss, improper installation of discharge gap, and foreign object overlap, etc. When dealing with overhead ground wire defects, if the work site is adjacent, parallel, intersecting, and crossing, and the lines are erected on the same tower, in order to prevent the induced voltage on the maintenance lines from causing injury, a personal safety line should be used when it is necessary to touch or approach the ground wire. Currently, there is no traditional shorting tool for the conventional overhead ground wire shorting work, which has the problem of serious time consumption, resulting in low efficiency of overhead ground wire shorting work. Therefore, it is urgent to develop a special shorting tool for overhead ground wire of power transmission lines. SUMMARY

[0003] In order to overcome the above technical problems, the utility model provides an overhead ground wire shorting tool for power transmission lines, and the specific technical solutions are as follows:

[0004] An overhead ground wire shorting tool for power transmission lines, which comprises a conductor clamp and a grounding clamp, the conductor clamp and the grounding clamp are connected by a shorting wire, the conductor clamp is used to clamp the overhead ground wire, and the grounding clamp is used to be fixed on the tower cross arm and form an electrical connection with the conductor clamp through the shorting wire, ensuring the effectiveness of the shorting, the conductor clamp comprises a U-shaped hook, a groove is formed in the inner side of the U-shaped hook, two arc spring leaves are symmetrically arranged in the groove, the arc top parts of the two arc spring leaves are in contact in the middle, providing clamping force for the conductor, the two ends of the two arc spring leaves are fixed in the groove on the inner side of the head of the U-shaped hook, a spring is horizontally arranged on the inner side of the arc top, the spring is used to continuously provide clamping force for the spring leaves, one end of the spring is in contact with the inner side of the arc top of the arc spring leaf, and the other end is fixed on a spring seat, the spring seat is fixed in the groove on the inner side of the U-shaped hook, ensuring the stability and supporting effect of the spring, one side end of the U-shaped hook is provided with an insulating handle, one end of the insulating handle is fixedly connected with a conductive clamp, the one side end of the U-shaped hook is connected with the conductive clamp in a clamping manner, a first terminal post is arranged on the conductive clamp, used to connect one end of the shorting wire, and providing good conductivity.

[0005] Further, the ground clamp comprises a clamp body, the clamp body is a C-shaped structure, the upper part of the clamp body is a clamping part, the lower part is an adjusting part, a screw hole is vertically arranged on the adjusting part, and a screw rod is arranged, the screw rod vertically penetrates the screw hole, a tongue depressor is fixedly arranged on the upper end of the screw rod, and a rotating handle is connected to the lower end of the screw rod, the lower end surface of the clamping part and the upper end surface of the tongue depressor form a clamping surface, forming an effective clamping structure, and the rotating direction of the screw rod can be adjusted by the rotating handle, when the screw rod is rotated, the tongue depressor moves up and down with the screw rod, and the clamping or loosening of the clamp is realized.

[0006] Further, the short connecting wire is made of soft copper wire, so that good conductivity and flexibility are ensured, and a stable electric circuit is formed when the wire clamp and the ground clamp are connected.

[0007] Compared with the prior art, the utility model has the advantages of the following:

[0008] The overhead ground wire short connection tool for power transmission line provided by the utility model is suitable for the overhead ground wire maintenance work of 110kV and above power transmission lines, the tool has a simple structure, the wire end is clamped by a wire clamp, the wire clamp can provide continuous and stable clamping force, effectively clamps the overhead ground wire, the ground end is provided with a ground clamp, and the operation is convenient and firm.

[0009] The utility model has the advantages of small size, light weight and convenient carrying, the operation time of the overhead ground wire short connection is greatly shortened, the maintenance work efficiency is improved, and the labor intensity of the operator is reduced. The operator only needs to hold an insulating rod, easily hangs the U-shaped hook on the overhead ground wire, and effectively forms the short connection, so that the operation convenience is improved. Meanwhile, the ground clamp adopts a C-shaped structure and a screw rod adjusting mechanism, the operation is simple and reliable, and the ground clamp is suitable for different sizes of tower cross arms.

[0010] In addition, the utility model ensures the stable connection of the wire end and the ground end, and the wire end and the ground end are not easy to fall off, so that the safety of the operation is further improved. Through the optimized wire end clamp structure and the short connecting wire connection, the utility model makes up for the blank of the lack of special ground wire short connection tool in the market, and has wide applicability, practicality and application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a schematic view of the utility model embodiment;

[0012] Figure 2 is an isometric view of the wire clamp in the utility model embodiment;

[0013] Figure 3 is a front view of the wire clamp in the utility model embodiment;

[0014] Figure 4 is the front view of the grounding clamp in the embodiment of the utility model;

[0015] Figure 5 is the front view of the grounding clamp in the embodiment of the utility model.

[0016] Wherein the reference sign: 100, wire clamp; 101, U-shaped hook; 102, groove; 103, arc spring leaf; 104, spring; 105, spring seat; 106, insulating handle; 107, conductive clamp; 108, first terminal post; 200, grounding clamp; 201, clamp main body; 202, clamping part; 203, adjusting part; 204, screw hole; 205, screw rod; 206, tongue depressor; 207, rotating handle; 208, second terminal post; 300, short connecting wire. DETAILED DESCRIPTION

[0017] Hereinafter, the technology in the embodiments of the utility model will be described clearly and completely by combining with the drawings in the embodiments of the utility model; obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments; based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without making creative labor should belong to the protection scope of the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0018] Embodiment 1:

[0019] With reference to Figure 1 , Figure 2The embodiment provides a power transmission line overhead ground wire short-circuit tool, which comprises a wire clamp 100 and a grounding clamp 200, the wire clamp 100 is connected with the grounding clamp 200 through a short-circuit wire 300, the wire clamp 100 is used for clamping the overhead ground wire, the grounding clamp 200 is used for being fixed on a cross arm of a tower and being electrically connected with the wire clamp 100 through the short-circuit wire 300, so that the short-circuiting is ensured to be effective, the wire clamp 100 comprises a U-shaped hook 101, a groove 102 is formed in the inner side of the U-shaped hook 101, two arc spring sheets 103 are symmetrically arranged in the groove 102, the arc top portions of the two arc spring sheets 103 are in contact with each other, so that clamping force on the wire is provided, the two ends of the two arc spring sheets 103 are fixed in the groove 102 in the inner side of the U-shaped hook 101, a spring 104 is horizontally arranged in the inner side of the arc top, the spring 104 is used for continuously providing the clamping force of the arc spring sheet 103, one end of the spring 104 is in contact with the inner side of the arc top of the arc spring sheet 103, and the other end is fixed on a spring seat 105, the spring seat 105 is fixed in the groove 102 in the inner side of the U-shaped hook 101, so that the stability and supporting effect of the spring 104 are ensured, one side end of the U-shaped hook 101 is provided with an insulating handle 106, one end of the insulating handle 106 is fixedly connected with a conductive clamp 107, the end of the U-shaped hook 101 is connected with the conductive clamp 107 in a clamping mode, the conductive clamp 107 is provided with a first wire post 108, which is used for being connected with one end of the short-circuit wire 300 and providing good conductivity.

[0020] As preferred, the ground wire clamp 200 comprises a clamp main body 201, the clamp main body 201 has a C-shaped structure, the upper part of the clamp main body 201 is a clamping part 202, and the lower part is an adjusting part 203, a screw hole 204 is vertically arranged on the adjusting part 203, and a screw rod 205 is arranged on the adjusting part 203, the screw rod 205 vertically penetrates through the screw hole 204, a tongue 206 is fixedly arranged on the upper end of the screw rod 205, a rotating handle 207 is connected to the lower end of the screw rod 205, the lower end surface of the clamping part 202 and the upper end surface of the tongue 206 form a clamping surface, so that an effective clamping structure is formed, an operator can adjust the rotating direction of the screw rod 205 through the rotating handle 207, when the screw rod 205 is rotated, the tongue 206 moves up and down together with the screw rod 205, and the clamping or loosening of the clamp is realized. Meanwhile, a second wire post 208 is arranged on the side surface of the clamp main body 201, which is used for being connected with the other end of the short-circuit wire 300, so that an electric circuit is formed, and the stability and reliability of the grounding connection are ensured.

[0021] As preferred, the short-circuit wire 300 can adopt a soft copper wire, so that good conductivity and flexibility are ensured, and thus a stable electric circuit is formed when the wire clamp and the grounding clamp are connected.

[0022] The working principle of the embodiment is as follows:

[0023] First, the grounding clamp 200 is clamped on the tower cross arm, the operator adjusts the rotation of the screw rod 205 by rotating the rotating handle 207 on the grounding clamp 200, and then controls the up and down movement of the pressing tongue 206 to realize the clamping or loosening of the cross arm. The lower end surface of the pressing tongue and the clamping part together forms a clamping surface, the grounding clamp 200 is clamped on the tower cross arm to ensure the stability and firmness of the electrical connection; then, the operator holds the insulating handle 106 of the wire clamp 100 with his hand, and hangs the U-shaped hook 101 on the overhead ground wire. The two arc spring leaves 103 in the U-shaped hook 101 are automatically clamped on the overhead ground wire due to the action of the spring 104, so as to ensure that the wire is firmly clamped and not easy to slip off. Since the first connecting post 108 of the wire clamp 100 is connected with the second connecting post 208 of the ground clamp 200 through a soft copper wire, an effective electrical circuit is formed, the electrical connection between the overhead ground wire and the ground wire is ensured, a stable short circuit state is formed, the harm of induced current to the operator is effectively prevented, and the safety and efficiency of the maintenance operation are ensured.

Claims

1. A short-circuiting tool for overhead ground wires of power transmission lines, comprising a conductor clamp and a grounding clamp, wherein the conductor clamp and the grounding clamp are connected by a shorting wire, characterized in that: The wire clamp includes a U-shaped hook, a groove is provided on the inner side of the U-shaped hook, and two arc-shaped spring leaves are symmetrically arranged in the groove, the arc top parts of the two arc-shaped spring leaves are in contact, and the two ends of the two arc-shaped spring leaves are respectively fixed in the groove on the inner side of the U-shaped hook head, and springs are horizontally provided on the inner sides of the arc tops of the two arc-shaped spring leaves, one end of the spring is in contact with the inner side of the arc top of the arc-shaped spring leaf, and the other end is fixedly connected to a spring seat, and the spring seat is fixed in the groove on the inner side of the U-shaped hook head. An insulating handle is provided on one end of the U-shaped hook, and a conductive clip is fixedly connected to one end of the insulating handle. The end of the U-shaped hook is connected to the conductive clip by a clamping manner, and a first terminal is provided on the wire clamp.

2. A power transmission line overhead ground wire shorting tool according to claim 1, characterized in that: The grounding clamp includes a clamp body, which is a C-shaped structure. The upper part of the clamp body is a clamping part, and the lower part is an adjusting part. A screw hole is vertically opened on the adjusting part, and a screw is provided. The screw passes vertically through the screw hole. A pressing tongue is fixed at the upper end of the screw, and a rotating handle is connected to the lower end of the screw. The lower end surface of the clamping part and the upper end surface of the pressing tongue constitute a clamping surface, and a second terminal is provided on the side of the clamp body.

3. A power transmission line overhead ground wire shorting tool according to claim 1 or 2, characterized in that: The short-circuit wire is made of soft copper wire.

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