Antifriction device of power cable installation in pipe

Abstract

An antifriction device of power cable installation in pipe provided by the invention relates to an auxiliary device of cable installation in pipe of a power cable. At present, the maximum technological difficulty of the cable installation in pipe is high friction between the power cable and the pipe wall, a big traction is needed when the cable installation in pipe is preformed, while too big traction is easier to cause damaging of the cable body and the drawing head of the cable. The antifriction device of power cable installation in pipe comprises cable shaft sleeves capable of passing through and fixing the cable and balls uniformly embedded at the side surfaces of the other cylinders of the cable shaft sleeves. The top ends of the surfaces of the balls are higher than the round side surfaces of the cable shaft sleeves, the cable shaft sleeves sleeve ball holding cavities, and the ball holding cavities are in a clearance fit relationship with the balls to make the balls roll in the ball holding cavities. Through contact of balls and the inner wall of a pipe, the mode that an original wire is directly contacted with the surface of the pipe is changed so that the friction of the pipe is greatly reduced when the cable installation in pipe is performed.

Description

technical field [0001] The invention relates to a pipe-laying auxiliary device for power cables. Background technique [0002] With the rapid development of cities, the implementation of cables into the ground is the need to improve the level of urban construction and beautify the environment of urban construction, and it is also the general direction of urban power grid development. The power cable laying method is selected according to factors such as working conditions, environmental characteristics, cable types, and path characteristics. Generally, it can be summarized as direct burial laying, cable trench laying, pipe laying, tunnel laying, underwater laying, etc., as well as the interactive combination of the above methods. The specific laying methods are divided into manual laying and mechanical laying. [0003] At present, due to the high voltage level, large load current determines the large cross-section and single weight of the cable, and the complex laying envir...

AI Technical Summary

Problems solved by technology

The biggest technical bottleneck in pipe laying is that the friction between the power cable and the pipe wall is large, and a large traction force is required during laying. If the traction force is too large, it is easy to cause damage to the cable body and the cable leader, and the length of the cable segment is very short. A large number of intermediate joints are used for power cable connection, which affects the safety and reliability of power cable operation

At present, the commonly used anti-friction methods mainly include water injection, talcum powder, lubricants, etc. These methods have poor anti-friction effects, and are likely to cause environmental pollution and change the operating environment of power cables.

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