A Large-Section Expanding Diameter Wire Clamping Device

Abstract

The invention provides a clamping device for large-section expanded diameter conductors, and relates to the technical field of construction equipment and construction technology of transmission lines. The clamping device is particularly suitable for anchoring connection of large-section supporting-type high-density polyethylene expanded diameter conductors, sparse-coiled concentrically stranded circular aluminum conductors and the like in the tension stringing construction, and simultaneously, can be used for anchoring connection of larger-section four-layer concentrically stranded circular aluminum conductors. When the clamping device disclosed by the invention performs anchoring, the loading capacity is large and no slippage occurs, and the structures of the clamped parts of the conductors do not deform and have no indentation; the weight of the clamping device is lightened, therefore, the clamping device is convenient for working at heights; the good clamping performance provides safe and reliable guarantee for the anchoring connection of the large-section expanded diameter conductors; and the big problem that the clamping device for the expanded diameter conductors is lack in the tension stringing construction is solved.

Description

technical field [0001] The invention belongs to the field of power transmission line construction equipment and construction technology, and in particular relates to a large cross-section diameter-expanding wire gripping device. Background technique [0002] For transmission lines with special requirements on corona resistance performance such as high voltage level, large transmission capacity, and high altitude areas, on the premise of meeting the requirements of transmission capacity and line engineering, the use of new structural conductors with large cross-sections and enlarged diameters can reduce The total weight of the conductor and the number of conductor splits; reduce the tower load and structural weight, and reduce the engineering cost of the line. In the process of stringing, the method of crimping the wires in the air is often used, and the clamping work of the wires must be completed in the air. In this way, the requirements for the wire clamp are higher. It ca...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned patents are all applicable to three-layer and below-diameter round wire concentrically twisted common wires, Figure 5 It is a cross-sectional view of a three-layer round wire concentrically stranded aluminum conductor. This kind of clamp cannot be used for clamping connection of expanded diameter wires. The main problems are: 1. The length of the jaw is too short, exceeding the allowable inspection of expanded diameter wires 2. The parallelism of the jaws is poor, and the local stress is too concentrated; 3. The surface of the jaws is designed with anti-skid lines or the same helix as the surface of the wire, which will inevitably damage the surface of the wire; 4. The breaking force of the clamped wire is less than the rated 50% of the breaking force (the standard value is 90% of the rated breaking force); 5. The upper and lower jaws are in contact with the wire at three points, and the expanded wire is not suitable; 6. The glue on the surface of the jaw is easy to fall off, causing the wire to be stuck device slipped

However, the ordinary round wire concentric twisted aluminum wire clamp cannot meet the requirements for the use of expanded wires. Usually, different wire structures and wire diameters are equipped with special wire clamps during construction. The optimal design of structural parameters such as the balance force system of the wire clamp structure, the shape of the clamp body, the length of the jaws, the maximum opening of the jaws, and the bevels at both ends of the jaws have made the wire clamps and wires reach an ideal stress state. While ensuring the grip strength, the wire clamp does not slip or damage the wire, providing a safe and reliable anchoring tool for the expanded wire

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