JPS587796Y2 - Metal wheel passing type retaining clamp - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a compression type detention clamp used for securing electric wires such as steel-core aluminum stranded wires of overhead power transmission lines.

In the work of securing power transmission line detention clamps to steel towers, that is, wire tensioning work, conventional methods have been used to compress and fix compression-type detention clamps to electric wires using hydraulic machines on the steel tower, and then fix them to the tower.

In recent years, as the capacity of power transmission lines has increased, the cables have become dog-sized, and due to site conditions and environmental issues, power transmission lines often pass over steep mountainous areas with a height of 1 square inch, making safe work and equipment difficult. Efforts were made to reduce the work on the tower in order to save transportation and labor, by compressing and fixing the retaining clamp to the sending end of the wire on the ground or in the factory, and once the compressed state was completed, the wire was passed through a metal wheel suspended from the tower.
A construction method has been developed to extend power lines to a designated tower.

A retaining clamp for this purpose is a so-called metal wheel passing type retaining clamp, for example, Utility Model Publication No. 52-3672 (No.
(see figure), Utility Model Application Publication No. 52-13495 (Figures 4 and 5)
There are some well-known ones described in .

However, with these retaining clamps, for example, when the aluminum clamp A is compressed, the steel clamp S may bend or twist, causing deformation of the mounting part of the jumper socket (J) of the aluminum clamp A, or damage to the bolts. This will cause holes B to be uneven, and in the latter case, the connection part C between aluminum clamp A' and Jumper Cerato J' will become a forced compression part, and there is a concern that it will freeze and expand in cold regions due to the intrusion of rainwater. Countermeasures are required.

Since the spun jumper socket fastening bolt U is located on the outer edge of the aluminum clamp, part C of installing the jumper socket becomes very large in order to obtain good electrical contact, which is not convenient from an economical standpoint as well as an appearance standpoint. do not have.

The purpose of this invention is to eliminate the above-mentioned structural defects and to provide a retaining clamp with good workability at a low cost.

In the following, the invention will be explained in detail with reference to the illustrated embodiments.

As shown in Figures 1 and 2, the detent clamp of this invention is mainly composed of an aluminum clamp 3, which can be manufactured by processing a round bar of aluminum or aluminum alloy, and has a steel core at one end. The aluminum wire gripping part of the aluminum stranded wire and the steel sleeve insertion part are provided as a bottomed hole 4, and the other end 7 of the aluminum clamp is provided with a steel connecting part 11 for connecting to an insulator chain, etc., with a screw 12, for example. It is fixed by being screwed into the screw 13 or by crimping.

Therefore, the aluminum clamp is connected between the other end 7 and the end provided with the bottomed hole 4 for inserting the steel sleeve into the socket 14.
A jumper socket connecting portion 5 is provided for attaching the jumper socket.

This connecting part 5 has a flat part made by processing a round bar to have a rectangular cross section, and a plurality of through holes 6 for champagne kerato connection are bored in this flat part.

Also, to attach the aluminum stranded wire to the aluminum clamp,
After inserting the aluminum stranded steel core wire 2 into the steel core insertion hole 10 of the steel sleeve 8, it is compressed and gripped by a hydraulic machine, and then inserted into the bottomed hole 4 of the aluminum clamp 3 so as to touch the bottom of the bottomed hole 4. By positioning the steel sleeve and compressing the entire surface of the aluminum clamp, as an example, in the case of a steel-cored aluminum stranded wire, the aluminum wire is directly compressed by the aluminum clamp, and the steel-core wire is compressed and clamped by the steel sleeve. The electric wire is transmitted from the uneven portion 9 of the steel sleeve to the aluminum clamp, and all electrical and mechanical performance of the wire is integrally transmitted and fixed to the aluminum clamp.

The jumper socket is connected to the aluminum clamp by compressing and fixing the jumper wire 1' and passing the bolt 15 through the through hole 6 of the mounting portion 5.

According to this invention, which has the structure described above, there is no bending or twisting of the steel clamp, no unevenness of holes, etc. when installing the jumper socket, and there is no non-compressible part in the cylindrical part of the aluminum clamp. First, there are no protruding parts, so the wheel passes through smoothly.Furthermore, the jumper socket can be made smaller and lighter, making it easier to work with.We have created a wheel-passing type compression retention clamp with a structure that is favorable both economically and in terms of appearance. can be provided.

[Brief explanation of the drawing]

Figure 1 is a side view showing a part of an embodiment of the retention clamp of this invention in cross section, Figure 2 is an exploded perspective view of the retention clamp shown in Figure 1, and Figure 3 is an example of a conventional retention clamp. FIGS. 4 and 5 are a plan view and a side view showing other conventional examples. 1...Aluminum stranded wire, 2...Steel core wire,
3...Aluminum clamp, 4...Bottomed hole for inserting aluminum wire steel sleeve, 5...Jumper socket mounting part, 6...Through hole, 7...
Aluminum clamp other end, 8...Steel sleeve, 9.
......Steel sleeve uneven non-compressible part, 10...
Steel sleeve steel core insertion part, 11...Steel connection part, 1
2...Thread, 13...Female thread, 14.
... Jumper socket, 15 ... Jumper socket installation is done with bolts.

Claims (1)

[Scope of utility model registration request] Steel core aluminum □ In a retaining clamp for holding stranded wires, a compression part that grips the steel core is provided with a bottomed hole that is both an electric wire insertion hole and a steel sleeve insertion hole at one end of the aluminum clamp made of aluminum or aluminum alloy. and an uneven non-compressible part that transmits the tension of the steel core wire to the aluminum clamp. A steel connecting part for connecting to an insulator chain, etc. is connected to the other end, and a jumper socket with a rectangular cross section having a through hole is connected between the other end of the aluminum clamp and the part with the bottomed hole. A metal wheel passing type compression retention clamp with a connecting agent.