Preparation method of integrally prefabricated intermediate joint

Abstract

The invention discloses a preparation method of an integrally prefabricated intermediate joint, which specifically relates to the technical field of insulated power cable fitting preparation. The method comprises four steps of preparing a stress cone, preparing a high-voltage shield, preparing an insulating outer shield, assembling components and preparing an insulating filling layer. The producedintegrally prefabricated intermediate joint is high in production speed, convenient to prepare and distinct in layering, all structural layers are used in cooperation, an intermediate joint body is resistant to bending, and the service life of the intermediate joint is prolonged. The stress cone, the high-voltage shield, the insulating outer shield and the insulating filling layer are sequentially cast, different vulcanization processes are used for treatment, the structural layers are matched, the arrangement mechanical performance of the intermediate joint body is improved, the intermediatejoint body is good in elastic performance and high in hardness, use of the intermediate joint body is facilitated, mold closing seams on insulation are completely eradicated, meanwhile, the problem caused by the fact that a shielding layer is thin is solved, and the insulation performance is well guaranteed.

Description

technical field [0001] The invention relates to the technical field of preparation of insulated power cable fittings, and more specifically, the invention relates to a method for preparing an integral prefabricated intermediate joint. Background technique [0002] China's electric power industry is developing rapidly. The installed capacity of power generation and annual power generation have ranked first in the world. The level of power equipment has been greatly improved. The number of large-capacity, high-parameter, and environmentally-friendly units has grown rapidly. The coverage and modernization of the power grid have continued. Improvement, China's electric power industry has entered a new development stage of large power grid, large generating units, west-to-east power transmission, north-south mutual aid, and national networking, and is moving towards a higher goal of high efficiency, environmental protection, safety, and economy. With the acceleration of urbanizat...

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Problems solved by technology

[0004] However, when the structures of the two rubber parts provided in the above technical solution are actually prepared, there are still many shortcomings, such as the consistency of rubber vulcanization treatment, which makes the structural layer of the overall prefabricated intermediate joint single and reduces its overall mechanical properties. During use, cracks are prone to occur, so that the insulation of the intermediate joint body cannot be guaranteed

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