Production method and processing equipment of high-voltage insulated direct-current cable accessory material

Abstract

The invention discloses a production method and processing equipment of a high-voltage insulated direct-current cable accessory material. The production method comprises the following steps: (1) selecting a high-pressure reaction kettle; and the like. Complexing coordination ions are introduced into the synthesis of ethylene propylene diene monomer (EPDM); in the synthesis process, the monomer isin a liquid state; complexing coordination ions can be uniformly distributed in the main rubber; the space charges at the accessory insulation part and the cable insulation part can be effectively ledout; meanwhile, the reliability of the material is ensured; before the polymerization of ethylene propylene diene monomer (EPDM) in a high-pressure reaction kettle body; nitrogen is introduced into the high-pressure reaction kettle body after vacuumizing by an arranged drive removal device, the operation is repeated for three times, oxygen can be removed while nitrogen is introduced into the reaction kettle, meanwhile, a dry environment can be kept in the reaction kettle, and the EPDM reaction efficiency is further improved.

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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