Production method and processing equipment for high-voltage insulating DC cable accessories

Abstract

The invention discloses a production method of a high-voltage insulated DC cable accessory material and its processing equipment. In the synthesis of rubber (EPDM), complexing coordination ions are introduced. During the synthesis process, the monomer is in a liquid state, and the complexing coordination ions can be very uniformly distributed in the main rubber, which can effectively separate the insulation of accessories and cable insulation. The space charge is derived, and at the same time, the reliability of the material is ensured. Before the polymerization of EPDM in the autoclave body, the drive removal device is provided, and the vacuum is pumped into the autoclave body. Feed nitrogen, repeat the operation three times, the nitrogen can remove oxygen while passing into the reactor, and can keep the environment dry in the reactor at the same time, further improve the reaction efficiency of ethylene propylene diene monomer (EPDM).

Description

technical field [0001] The invention relates to the technical field of DC cable accessory materials, in particular to a production method and processing equipment for high-voltage insulating DC cable accessory materials. Background technique [0002] High-voltage direct current transmission has the advantages of small loss, large transmission capacity, unlimited transmission distance, low cost, strong resistance to natural disasters, etc. More and more attention has been paid to it. Cable accessories in power systems are an important part of power cables. The failure probability of cable accessories in the operation of the line accounts for 80% of power failures. In the DC cable accessories, the generation of space charge has a significant impact on the distribution of the electric field, which will cause distortion of the electric field distribution of the insulating material, and the local electric field will increase and the discharge will decrease. The useful life of the...

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Problems solved by technology

[0004] However, the blending method used in the processing of DC insulation materials is extremely strict, and the repeatability is poor. The electrical properties of different batches of glue test vary greatly. The main reason is that the distribution of nanoparticles in the main glue is inconsistent. As a result, during the preparation of EPDM, in order to prevent the input catalyst from reacting with the water and oxygen in the autoclave, before and during the reaction in the autoclave , it needs to be kept in an anhydrous and oxygen-free environment. However, when the existing high-pressure reactor is used, a certain amount of oxygen and water often remain inside, which consumes the catalyst and affects the preparation of EPDM rubber.

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