CN204205093U - Electricity testing grounding ring - Google Patents

Abstract

The utility model discloses an electric test grounding ring, which comprises a clamping assembly, a grounding ring and an insulating shield; the clamping assembly comprises a C-shaped body, a clamping block and fastening bolts; the C-shaped body and the clamp The blocks are fixedly connected by the fastening bolts, and there are two clamping spaces between the C-shaped body and the clamping block for clamping and fixing the grounding ring and the cable respectively; the inner side of the C-shaped body is formed There are two clamping grooves, and two clamping slopes with an acute angle are arranged on the clamping block, and the clamping grooves and the corresponding clamping slopes are combined to form the clamping space. The holes through which the fastening bolts pass are waist-shaped holes. The electric testing grounding ring of the utility model has a reasonable structure, is suitable for reliable installation on various cables with different specifications, and is convenient for high-altitude installation operation, thereby reducing the risk of high-altitude operation and having good use effect.

Description

Electrical grounding ring

technical field

The utility model relates to an electric testing grounding ring, which belongs to the field of structural design of electric fittings.

Background technique

With the rapid development of the urban economy and the improvement of the quality of urban life, the country vigorously promotes overhead insulated conductors. Overhead insulated wires have better insulation and anti-corrosion performance than ordinary overhead bare wires, which can not only avoid short-circuit and grounding accidents caused by natural factors such as trees and strong winds, but also effectively solve line faults caused by trees and external damage, greatly improving the reliability of the line Sex; and cheaper than buried cables, simple construction and easy maintenance. Therefore, it is widely used in urban and rural distribution networks, especially in densely populated areas, industrial areas with a lot of metal dust pollution, and areas with more lightning.

In the current urban distribution network, when repairing lines or equipment, in order to ensure the safety of the maintenance personnel, it is necessary to hang the grounding protection line after verifying that the line is dead, which requires that the grounding ring and the cable must be in reliable contact. The existing grounding rings for electrical testing can be divided into the following three types: (1) Physical crimping with H-type clamps or C-type clamps, which is characterized by excellent electrical contact performance, but requires special hydraulic pliers, and is not suitable for high-altitude operations. Disadvantages such as inconvenient disassembly and assembly. (2) Install with conventional parallel trench grounding clamps, which are characterized by good electrical contact performance, but the disadvantages are that they are only suitable for a certain specification of wires, and the bolts are easy to fall out when working at heights. (3) Installation with piercing grounding clamps is characterized by simple structure and good insulation performance, but there are disadvantages such as high product quality requirements, high requirements for construction personnel's operation and acceptance, high unit price, and general electrical contact performance.

Utility model content

In view of this, the purpose of the utility model is to provide a reasonable structure, suitable for reliable installation of electric testing grounding ring on a variety of cables with different specifications.

The technical scheme that realizes the utility model purpose is:

An electrical test grounding ring, including a clamping assembly, a grounding ring, and an insulating shield covering the outside of the clamping assembly; the clamping assembly includes a C-shaped body, a clamping block, and a fastening bolt, and the C-shaped body It is fixedly connected with the clamping block through the fastening bolt, and there are two clamping spaces for clamping and fixing the grounding ring and the cable respectively between the C-shaped body and the clamping block; the C Two clamping grooves are formed on the inner side of the shape body, and two clamping slopes with an acute angle are arranged on the clamping block, and the clamping grooves and the corresponding clamping slopes are combined to form the clamping space, so The hole through which the fastening bolt is pierced on the clamping block is a waist-shaped hole.

In the above technical solution, the fastening bolt is a square neck bolt, and the hole through which the C-shaped body is pierced is a square hole adapted to the shape of the neck of the fastening bolt.

In the above technical solution, the fastening bolt is sleeved and fixed with a detachment preventing member that prevents the fastening bolt from falling off the C-shaped body.

In the above technical solution, protruding teeth are formed in the clamping groove for clamping and fixing the cable.

In the above technical solution, the grounding ring includes a rectangular ring-shaped body part and an insulating layer covering the outer wall of the body part, and the exposed part in the middle of the upper end of the body part is clamped in the clamping space , the lower middle part of the body part and the exposed part of the right middle part or the left middle part of the main body part are exposed to the atmosphere.

The utility model has positive effects:

(1) When installing the electric inspection grounding ring of the utility model, tighten the fastening bolts so that the cable and the grounding ring are respectively clamped and fixed in the two clamping spaces, and waist-shaped holes are set on the clamping block Through the fastening bolts, the clamping block has a certain range of motion. In this way, the clamping space formed by the combination of the clamping slope and the corresponding clamping groove can reliably clamp cables of various specifications. And it will not be affected by the diameter of the grounding ring. The product has a wide range of applications, superior electrical performance, relatively low cost, and has a good use effect.

(2) In the electric test grounding ring of the present utility model, the fastening bolt is a square neck bolt, and the hole of the C-shaped body pierced on the C-shaped body is in the same shape as the neck of the fastening bolt. Adaptive square holes; by adopting this structure, when the nuts matched with the fastening bolts are tightened, the fastening bolts will not rotate with the nuts, which is beneficial for high-altitude installation operations.

(3) In the electric testing grounding ring of the present invention, the fastening bolts can be effectively prevented from falling off from the C-shaped body by providing anti-detachment parts on the fastening bolts, thereby facilitating installation work at heights.

(4) In the electric test grounding ring of the present utility model, the connection with the cable can be made more reliable by providing convex teeth in the clamping groove.

Description of drawings

Fig. 1 is the perspective view of the electric test grounding ring of the present utility model;

Fig. 2 is a sectional view of the grounding ring for electrical testing shown in Fig. 1;

Fig. 3 is a schematic diagram of the structure of the electric testing grounding ring shown in Fig. 1 when the insulating shield is removed.

The reference signs shown in the figure are: 1-clamping assembly; 11-C-shaped body; 12-clamping block; 13-fastening bolt; 14-clamping space; 15-clamping groove; 16-clamping slope; 2-grounding ring; 21-body part; 22-insulation layer; 3-prevention piece; 4-insulation shield; 5-cable.

Detailed ways

Below in conjunction with accompanying drawing of description, the concrete structure of electric test grounding ring of the present utility model is done to illustrate:

An electrical test grounding ring, as shown in Figures 1 to 3, includes a clamping assembly 1, a grounding ring 2, and an insulating shield 4 placed outside the clamping assembly; the clamping assembly 1 includes a C-shaped Body 11, clamping block 12 and fastening bolt 13, said C-shaped body 11 and said clamping block 12 are fixedly connected by said fastening bolt 13, said C-shaped body 11 and said clamping block 12 are provided with Two clamping spaces 14 for clamping and fixing the grounding ring 2 and the cable 5 respectively; two clamping grooves 15 are formed on the inner side of the C-shaped body 11, and two clamping grooves 15 are formed on the clamping block 12. The clamping slope 16 with an acute angle, the clamping groove 15 is combined with the corresponding clamping slope 16 to form the clamping space 14, and the hole through which the fastening bolt 13 is pierced on the clamping block 12 is waist-shaped hole. When installing the electric test grounding ring, tighten the fastening bolts 13 so that the cable 5 and the grounding ring 2 are respectively clamped and fixed in the two clamping spaces 14, and the clamping block 12 is provided with a waist-shaped hole ( The length direction of the waist-shaped hole is perpendicular to the length direction of the clamping space 14) through the fastening bolt 13 so that the clamping block 12 has a certain range of motion, so that the clamping slope 16 The clamping space 14 formed by combining with the corresponding clamping groove 15 can reliably clamp cables of various specifications, and will not be affected by the diameter of the grounding ring 2. This product has a wide range of applications, superior electrical performance, and relatively low cost , has a very good use effect. .

In this embodiment, the fastening bolt 13 is a square neck bolt, and the hole through which the C-shaped body 11 is pierced on the C-shaped body 11 is a square hole adapted to the shape of the neck of the fastening bolt 13 ; By adopting this structure, when the nut matched with the fastening bolt 13 is tightened, the fastening bolt 13 will not rotate with the nut, which is beneficial for high-altitude installation work.

Further, in order to prevent the fastening bolts 13 from falling off from the C-shaped body 11, so as to facilitate the installation work at heights, the fastening bolts 13 in this embodiment are sleeved and fixed with anti-off parts 3, and the anti-slip The stripping part 3 can be a rubber ferrule that fits on the fastening bolt 13 with an interference fit, or can be a clip spring clamped on the fastening bolt 13 .

In this embodiment, protruding teeth are formed in the clamping groove 15 for clamping and fixing the cable 5 . By adopting this structure, the cable 5 can be fixed more firmly in the corresponding clamping space 14 .

In this embodiment, the grounding ring 2 includes a rectangular ring-shaped body portion 21 and an insulating layer 22 covering the outer wall of the body portion 21, and the exposed middle part of the upper end of the body portion 21 is clamped on the In the clamping space 14 , the middle part of the lower end of the body part 21 and the exposed part of the middle part of the right end or the middle part of the left end of the body part 21 are exposed to the atmosphere. In this embodiment, by setting the exposed part at the middle of the lower end of the body part 21 and the middle of the right end or the middle of the left end of the body part 21, it is convenient for the staff to select a suitable exposed part to connect to the grounding protection wire according to the site conditions. In actual operation, the main body 21 of the grounding ring 2 can be made of an aluminum body, and a copper layer is provided on the outer wall of the exposed part of the aluminum body, thus forming a copper-aluminum transitional grounding ring. The transitional grounding ring has the advantages of low production cost and excellent electrical conductivity; furthermore, the copper layer is preferably made of copper tube, and the copper tube and the aluminum body are cast as one, which can simplify the processing procedure and further reduce the production cost.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or changes derived from the essential spirit of the present utility model still belong to the protection scope of the present utility model.

Claims (5)

1. An electric test grounding ring, comprising a clamping assembly (1), a grounding ring (2) and an insulating shield (4) sleeved on the outside of the clamping assembly; the clamping assembly (1) includes a C-shaped Body (11), clamp block (12) and fastening bolt (13), the C-shaped body (11) and the clamp block (12) are fixedly connected by the fastening bolt (13), and the C-shaped There are two clamping spaces (14) for clamping and fixing the grounding ring (2) and the cable (5) between the body (11) and the clamping block (12); it is characterized in that: the The inside of the C-shaped body (11) is formed with two clamping grooves (15), and the clamping block (12) is provided with two clamping slopes (16) at an acute angle, and the clamping grooves (15) and The corresponding clamping slopes (16) combine to form the clamping space (14), and the holes in the clamping block (12) through which the fastening bolts (13) pass are waist-shaped holes. 2. The grounding ring according to claim 1, characterized in that: the fastening bolt (13) is a square neck bolt, and the C-shaped body (11) is pierced by the C-shaped body (11) The hole is a square hole adapted to the shape of the neck of the fastening bolt (13). 3. The electric test grounding ring according to claim 2, characterized in that: the fastening bolt (13) is sleeved and fixed to prevent the fastening bolt (13) from the C-shaped body (11). The fall-off retaining piece (3). 4. The grounding ring for electrical testing according to claim 3, characterized in that: convex teeth are formed in the clamping groove (15) for clamping and fixing the cable (5). 5. The electrotest grounding ring according to any one of claims 1 to 4, characterized in that: the grounding ring (2) comprises a rectangular ring-shaped body portion (21) and is wrapped around the body portion (21) The insulating layer (22) on the outer wall, the exposed part of the upper middle part of the body part (21) is clamped in the clamping space (14), the lower middle part of the body part (21) and the The exposed part of the right middle part or the left middle part of the main body part (21) is exposed to the atmosphere.