Self-aligning Ball Bearing, Self Aligning Ball Bearings Ningbo Borine Machinery Co.,Ltd. , https://www.borine-agroparts.com
The manufacture of power cables includes many processes and can be generally divided into four main areas:
Conductor manufacturing, including 1) Drawing a wire to a desired diameter;
2) Stranding strands of multiple strands, sometimes requiring re-entrainment;
3) Combination in the manufacture of HV and EHV cables, stranding non-circular strands into a quasi-circular structure;
Insulated core manufacturing, including 1) Three-layer extrusion: Insulated cable cores are formed during this process, including the inner semi-conductive shield, the insulating layer and the outer semi-conductive shield;
2) Cross-linking: can be carried out directly after extrusion (peroxide cross-linking), or after extrusion using separate equipment (wet cross-linking);
3) Degassing: Removal of peroxide by-products by off-line heating, which is usually the basic process for HV or EHV cables, but is also often used for medium voltage submarine cables;
Cable sheath manufacturing, including 1) insulated wire core tape: In this process, the buffer layer, protective layer and water blocking layer are wrapped around the extruded insulation core;
2) Neutral wire stranding: Wrap the copper wire, copper tape or flat copper tape around the cable;
3) Metal sheath: moisture-proof and protective layer of metal;
4) Sheath: The use of a polymer sheath for mechanical protection (protection of metal foil is particularly important) and anti-corrosion effect;
5) Mounting: Use high-strength metal components (steel) to protect cables, especially submarine cables;
Quality control, including 1) raw material handling;
2) routine tests;
3) sampling test;
YJV power cable manufacturing process
Basic process flow
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