CN217720656U - Strain clamp - Google Patents

Abstract

The utility model belongs to an overhead power transmission and distribution line installation device, in particular to a strain clamp which is used for installing cables or electric wires and comprises a pull anchor, a clamp body, a wiring board and a jumper clamp; the anchor is provided with a circular ring limiting part and a long columnar body, wherein one end of the body is a solid unit and is connected with the circular ring limiting part; the other end is a tubular unit with a length; the wire clamp body is tubular, the tail end of the wire clamp body is bent downwards and extends, and the bent part body is provided with an insertion hole; the body of the pull anchor is inserted into the wire clamp body through the insertion hole; the wiring board is fixed on the lower end of the wire clamp body of the bending part; the jumper clamp is tubular and is installed on the wiring board. The utility model provides a crimping is more even fixed between strain clamp structure miniaturization, intensity height, the strain clamp and the wire, accords with transmission line's technical requirement.

Description

Strain clamp

Technical Field

The utility model belongs to built on stilts power transmission and distribution transformer line installation device specifically provides a strain clamp, and this fastener is for being used for installation cable or electric wire to use.

Background

The strain clamp is one of important hardware fittings of the power transmission line, is used for fixing a lead or a lightning conductor on a strain insulator string of a non-linear tower and plays roles of anchoring and conducting electricity. At present, the adoption of a strain clamp and a splicing sleeve for crimping is the only means for realizing long-distance uninterrupted power transmission of the ultra-high voltage transmission line. Although the design and the structure of the strain clamp are not complicated, the strain clamp plays a crucial role in the whole power transmission system. The strain clamp is sleeved on the periphery of a wire and fixed with the wire through crimping, the crimping process is gradually conducted along the axial direction from the steel anchor side, because the clamp aluminum tube is soft, the clamp axial port stress concentration damage wire is caused by the fact that the clamp aluminum tube is easily wrapped and protruded in the crimping process. In addition, some wire clamp anchor pulling sides used at present are welded and fixed with the wiring board, so that the manufacturing is complex, and the secondary utilization of the wiring board is not facilitated.

SUMMERY OF THE UTILITY MODEL

In order to solve one of the problems, the utility model provides a strain clamp which is used for fixing a lead 2 and comprises a pull anchor 1, a clamp body 3, a wiring board 4 and a jumper clamp 5;

the anchor 1 is provided with a circular ring limiting part and a long columnar body, wherein one end of the body is a solid unit and is connected with the circular ring limiting part; the other end is a tubular unit with a length;

the wire clamp body 3 is tubular, the tail end of the wire clamp body is bent and extended downwards, and the bent part body is provided with an insertion hole; the body of the pull anchor 1 is inserted into the wire clamp body 3 through the insertion hole; the wiring board 4 is fixed on the lower end of the wire clamp body 3 of the bending part; the jumper clamp 5 is tubular and is arranged on the wiring board 4.

Further, the lead 2 has a core portion which is not sheathed with a shell and a cable portion which is sheathed with a shell, the core portion is inserted into the tubular unit body of the pull anchor 1, and the cable portion and the end face of the body of the pull anchor 1 have a gap axially.

Furthermore, a plurality of concave ring grooves are arranged on the outer side of the solid unit of the pull anchor 1 body.

Further, the insertion hole is oval.

Further, the right end of the wire clamp body 3 is provided with a tubular crimping buffer part, the inner diameter of the crimping buffer part is unchanged, and the outer diameter of the crimping buffer part is gradually reduced along the axial direction.

Further, the wiring board 4 is fixed on the lower end of the bent wire clamp body 3 by a fastener 6

The utility model provides a crimping is more even fixed between strain clamp structure miniaturization, intensity height, the strain clamp and the wire, accords with transmission line's technical requirement.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the pull anchor;

the cable comprises a pull anchor 1, a wire 2, a cable clamp body 3, a wiring board 4, a jumper cable clamp 5, a fastener 6, a wire core portion 7, a cable portion 8, a concave ring groove 9, a ring limiting portion 10, a solid unit 11, a tubular unit 12 and a gap 13.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-2, the utility model provides a strain clamp for fixing a lead 2, which comprises a pull anchor 1, a clamp body 3, a wiring board 4 and a jumper clamp 5;

the anchor 1 is provided with a circular ring limiting part 10 and a long columnar body, wherein one end of the body is a solid unit 11 and is connected with the circular ring limiting part 10; the other end is a tubular unit 12 having a length.

The wire clamp body 3 is tubular, the tail end of the wire clamp body is bent and extended downwards, and the bent part body is provided with an insertion hole; the body of the pull anchor 1 is inserted into the wire clamp body 3 through the insertion hole; the wiring board 4 is fixed on the lower end of the bent wire clamp body 3; the jumper clamp 5 is tubular and is arranged on the wiring board 4.

The anchor 1 is inserted into the wire clamp body from the insertion hole, the wire core part 7 of the wire is inserted into the tubular unit of the anchor, and the anchor is gradually crimped along the axial direction from the anchor end of the wire clamp body to realize fixation. The jumper clamp 5 of the scheme is used for connecting wires between two wire clamps in a compression joint mode, namely, one end of each compression joint clamping wire of two jumper clamps of two adjacent wire clamps is connected.

In a development of the solution, the conductor 2 has an unsheathed wire core part 7 which is inserted into the tubular unit body of the pull anchor 1 and a sheathed cable part 8 which axially has a gap with the end face of the body of the pull anchor 1. Because aluminium system material is softer, this gap can effectually ensure the wire as the tip active area of pulling the anchor when carrying out the crimping to pulling the anchor to and it is even to realize the wire crimping, prevent that the crimping from playing the package phenomenon and taking place.

As a modification of the scheme, in order to better realize the compression joint, a plurality of concave ring grooves 9 are arranged outside the solid unit of the pull anchor 1 body. The fastener body after compressing tightly can be embedded into this indent annular, and the compactness of laminating each other is stronger.

As a scheme improvement, the insertion hole is oval.

In a modification of the above, the right end of the wire clamp body 3 has a tubular crimping buffer portion, and the inner diameter of the crimping buffer portion is unchanged, and the outer diameter is gradually reduced along the axial direction. Can reach the crimping and be full according to the self extension of aluminum pipe when the crimping, realize the natural transition, avoid crimping port department stress concentration, damage wire, have the potential safety hazard.

As a modification of the solution, the terminal block 4 is fixed to the lower end of the bent portion of the clip body 3 by a fastening member 6

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. The utility model provides a strain clamp for fixed wire (2), its characterized in that: comprises a pull anchor (1), a wire clamp body (3), a wiring board (4) and a jumper wire clamp (5);

the anchor (1) is provided with a circular ring limiting part and a long columnar body, wherein one end of the body is a solid unit and is connected with the circular ring limiting part; the other end is a tubular unit with a length;

the wire clamp body (3) is tubular, the tail end of the wire clamp body is bent and extended downwards, and the bent part body is provided with an insertion hole; the body of the pull anchor (1) is inserted into the wire clamp body (3) through the insertion hole; the wiring board (4) is fixed on the lower end of the wire clamp body (3) of the bending part; the jumper wire clamp (5) is tubular and is arranged on the wiring board (4).

2. The strain clamp of claim 1, wherein: the lead (2) is provided with a core part which is not sheathed with a shell and a cable part which is sheathed with the shell, the core part is inserted into the tubular unit body of the pull anchor (1), and a gap is axially formed between the cable part and the end surface of the body of the pull anchor (1).

3. The strain clamp of claim 1, wherein: a plurality of concave ring grooves are arranged on the outer side of the solid unit of the anchor (1) body.

4. The strain clamp of claim 1, wherein: the insertion hole is oval.

5. The strain clamp of claim 1, wherein: the right end of the wire clamp body (3) is provided with a tubular crimping buffering part, the inner diameter of the crimping buffering part is unchanged, and the outer diameter of the crimping buffering part is gradually reduced along the axial direction.

6. The strain clamp of claim 1, wherein: the wiring board (4) is fixed on the lower end of the wire clamp body (3) of the bending part through a fastener (6).

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