Protective sleeve for steel pipe opening

Abstract

The invention relates to a protective sleeve for a steel pipe opening. The protective sleeve can be inserted or embedded into a steel pipe used for installing a cable in a penetrating manner. The external diameter of the protective sleeve is matched with the internal diameter of the steel pipe opening. The protective sleeve, far away from the end inserted into the steel pipe opening, folds outwardly to form a protection ring. A clamping ring opening allowing a circumferential wall of the steel pipe opening to insert into is formed between the protection ring and an outer wall of the protective sleeve.

Description

technical field [0001] The invention relates to a protective sleeve for protecting cables, in particular to a protective sleeve for protecting cables at the mouth of a steel pipe. Background technique [0002] With the rapid development of our country's industry and the continuous expansion of its scale, every region in our country builds a large number of new substations or technically transforms old substations. [0003] In the construction of new or technically transformed substations, it is often necessary to pass cables through steel pipes. Due to the large amount of use and high installation size requirements, the steel pipes are often cut. However, the burrs left by the cut steel pipe mouth will damage the insulation layer of the wire or cable passing through the steel pipe. The main manifestations are: 1) When the wire or cable passes through the steel pipe, the construction personnel need to construct the wire or cable during construction. Some moving and bending p...

AI Technical Summary

Problems solved by technology

However, the burr left by the steel pipe after cutting will damage the insulation layer of the wire or cable passing through the steel pipe. Some moving and bending processes are required during the process, and the cutting edge is easy to damage the outer layer of the wire or cable (in severe cases, the outer and inner layers are damaged at the same time) insulation; 2) After the wire or cable passes through the steel pipe, the slight shaking and agitation in nature The edge of the cutting edge of the steel pipe will cause damage to the insulation layer of the wire or cable

[0004] Therefore, after the substation has been in operation for a long time, the insulation performance of the cables passing through the steel pipe port will decrease due to the damage of the insulation layer, and problems such as AC grounding and DC grounding will often occur, and in severe cases, it will cause AC or DC short circuit, causing severe damage to the substation. Operation and maintenance staff bring trouble

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