CN201075642Y - Strain clamp for carbon fiber composite core conducting wire - Google Patents

Abstract

The utility model discloses a tension clamp for carbon fiber composite core conductors used for fixing carbon fiber composite core aluminum hinged wires on overhead power lines and substation tension pole towers in electric power systems. It is composed of a wedge-shaped clamp seat in the main body of the wire clamp, a wedge-shaped clamp in the clamp seat that matches the shape of the inner hole, and an additional inner liner. It makes full use of the feature that the wedge-shaped clamp moves in the clamp seat to reliably clamp the carbon fiber composite core under temperature changes, and firmly crimps the inner tube with the main body of the clamp and the aluminum stranded wire to form a conductor without any damage to the carbon fiber composite core. damage. The utility model has the advantages of compact and reasonable design, novel and ingenious conception, little influence by temperature, strong impact resistance and fatigue resistance, evenly distributed grip force, strong load-bearing grip force, and effectively avoids loose grip force, etc. Moreover, when the system capacity is increased, the cable clamp does not need to replace the iron tower, does not damage the green space, and reduces economic losses, which is economical and practical. It has broad development prospects and is suitable for popularization and application.

Description

Tension clamp for carbon fiber composite core wire

Technical field:

The utility model relates to a tension clamp used for fixing steel-cored aluminum stranded wires on overhead power lines and substation tension towers in an electric power system.

Background technique:

The strain clamp is a fitting used for fixing wires on overhead power lines and substation tension towers in the power system. It connects the wires to the insulator strings, and the insulator strings are then connected to the iron tower to bear the tension of the wires and reduce the wire tension. It plays a very important role in the safe operation of the power system. For a long time, the above-mentioned wires have been made of steel-cored aluminum stranded wire. Due to the magnetic loss of the steel-cored aluminum stranded wire, the long-term operation line loss is relatively large. When the temperature is high, the slack of the line will also increase, which will affect the operation of the power system. In order to eliminate the hidden danger, it is necessary to increase the height of the iron tower or reduce the distance between the towers, especially in the case of system expansion, the iron tower must be replaced. In this way, it will not only increase the workload, increase the root opening of the iron tower, reduce the green space, but also cause serious economic losses. Therefore, in the current power grid transformation process, the steel-cored aluminum stranded wires of some lines have been changed to capacity-enhancing wires, that is, high-temperature-resistant, low-sag carbon fiber composite-cored aluminum stranded wires. At present, the tension clamp for fixing the steel-cored aluminum hinged wire is the main body of the clamp composed of an aluminum tube with a connecting plate at one end, the drainage clamp connected with the main body of the clamp and the steel anchor placed in the aluminum tube part of the main body of the clamp constituted. When installing, first crimp and fix the steel-cored aluminum hinged wire with the steel anchor, put on the main body of the wire clamp, and then crimp on both sides of the crimping point respectively. Although the carbon fiber composite core has the advantages of good resistance to environmental deterioration, no rust, no corrosion, and no electrolytic reaction with aluminum wires or other components, because the carbon fiber composite core is a brittle material, it is easy to Damage to the fiber causes it to break, thereby reducing the load-bearing capacity of the carbon fiber core along the line. It can be seen that the existing tension clamps cannot adapt to the tension fixing of carbon fiber composite core aluminum stranded wires at all. It has become a technical problem that the field is eager to solve but has not yet solved.

Invention content:

The utility model aims to provide a tension-resistant clamp for carbon fiber composite core wire, mainly to solve the problem that the existing tension clamp is not suitable for the tension-resistant fixation of carbon fiber composite core aluminum stranded wire, and the wire core is easy to be damaged during crimping. or break issues.

The scheme of the utility model is as follows: the utility model includes the main body of the wire clamp, the drainage wire clamp, the steel anchor, the connecting bolt, and the inner liner pipe. The wedge-shaped clamp with the same inner hole shape is formed by adding an inner liner pipe in the main body of the clamp. Wherein the wedge-shaped clamp seat is a cylindrical seat cover with a tapered through hole inside and one end protruding outside. The wedge-shaped clamp is a truncated cone jacket with a through hole inside, and two groups of gaps are arranged axially symmetrically on the cone of the jacket, and the gaps between the two groups are formed at 90° to each other.

Beneficial effects of the present invention: the utility model adopts the structure of wedge-shaped clamp seat, wedge-shaped clamp and inner liner pipe in the main body of the wire clamp, and fully utilizes the feature that the wedge-shaped clamp can move in the wedge-shaped clamp seat to clamp the carbon fiber composite core. , and firmly crimp the liner tube set in the crimping section with the main body of the wire clamp and the aluminum stranded wire, without any damage to the carbon fiber composite core (mainly because the existence of the liner tube protects the carbon fiber composite core ). Not only that, the utility model also has the advantages of compact and reasonable design, novel and ingenious conception, little influence by temperature, strong impact resistance and fatigue resistance, uniform grip force distribution, strong load-bearing grip force, and effectively avoiding loose grip force. At the same time, with the use of the strain clamp, in the case of system expansion, there is no need to replace the iron tower, no damage to the green space, and reduced economic losses, which is both economical and practical. It has great application value and broad development prospects.

Description of drawings:

Figure 1 is a schematic diagram of the overall structure of a tension clamp for a carbon fiber composite core conductor.

Detailed ways:

The outside of the tension clamp for carbon fiber composite core wire shown in Figure 1 is a clamp main body 1 composed of an aluminum tube and a connecting plate at one end of the aluminum tube. Inside the clamp main body 1, a liner tube 2 is provided for the corresponding crimping section. A wedge-shaped clamp seat 3 and a wedge-shaped clamp 4 in the wedge-shaped clamp seat 3 matching the shape of its inner hole are also arranged in the wire clamp main body 1 . The wedge-shaped clamp seat 3 is a cylindrical seat cover with a tapered through hole inside and one end protruding outside. The wedge-shaped clamp 4 is a truncated cone jacket with a through hole in it, and two groups of gaps 8 are axially symmetrically arranged on the cone of the jacket, and the two groups of gaps 8 are mutually 90°. The steel anchor 5 is screwed in from one end of the clamp main body 1 and is connected and fixed with the aluminum tube part of the clamp main body 1 and the wedge-shaped clamp seat 3 through threads. And it is formed by fixing the drain wire clip 7 through the bolt 6 at the connecting plate of the wire clip main body 1. During installation, a part of the wire core at the end of the carbon fiber composite core aluminum stranded wire is exposed, and then the carbon fiber composite core aluminum stranded wire is inserted into the clamp from the end of the tension clamp provided with the inner liner 2 until it is clamped in the wedge clamp 4 . Finally, the outside of the line clamp main body 1 where the liner pipe 2 and the steel anchor 5 are located can be crimped with a hydraulic method. During use, the steel anchor 5, the wedge-shaped clamp seat 3, the wedge-shaped clamp 4 and the carbon fiber composite core are connected together, and as the temperature changes, the metal material expands and contracts with heat, and the wedge-shaped clamp 4 can move along the inside of the wedge-shaped clamp seat 3 under the action of wire tension. The tapered through hole moves, and under the action of the gap 8 of the wedge-shaped clamp 4, the carbon fiber composite core is clamped more tightly, so as to ensure sufficient grip force and play a good tension-resistant effect on the wire.

Claims (3)

1. tension resisting clip for carbon fiber composite core conductive wire, comprise wire clamp main body (1), drainage wire clamp (7), steel anchor (5), connecting bolt (6), also comprise internal lining pipe (2), it is characterized in that: be provided with in the wire clamp main body (1) in wedge shape holder (3) and the wedge shape holder (3) with its in the wedge grip (4) that matches of hole shape, and set up in the online clip main body (1) that internal lining pipe (2) constitutes.

2. tension resisting clip for carbon fiber composite core conductive wire according to claim 1 is characterized in that: wedge shape holder (3) is established conical through-hole in being, is the cylindrical cover for seat of an end projection outward.

3. tension resisting clip for carbon fiber composite core conductive wire according to claim 1, it is characterized in that: wedge grip (4) is the individual interior taper type chuck of through hole that is, on the cone of this chuck, axially be arranged with two groups of gaps (8), between two groups of gaps (8) 90 ° each other.