Manufacturing technology of long-length jointless mineral insulation cable
A technology of mineral insulated cable and manufacturing process, which is applied in the direction of cable/conductor manufacturing, conductor/cable insulation, circuit, etc., which can solve the problems of cable production length restriction, long cable production cycle, and increased electrical hidden dangers, etc., and achieves one-time inspection High qualification rate, easy guarantee of structure, size and concentricity, and reduced manpower and material resources
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[0027] A manufacturing process of large-length non-joint mineral insulated cables, including the following steps:
[0028] (1) Use 12-16% H successively through the washing machine 2 SO 4 , Tap water to clean the copper strip, dry the cleaned copper strip at 35-45°C, the dried copper strip enters the forming roll for tube forming; the tension-aligned copper rod (conductor) flows into the core tube, and the copper The rod enters the stainless steel fixed core tube and is filled with special magnesium oxide powder at the same time. Silicon oil is injected into the special magnesium oxide powder in the fixed core tube. There is no need for any moisture removal treatment before the silicon oil injection. The special magnesium oxide powder contains more than 94% MgO. The rest is SiO 2 , CaO, Fe 2 O 3 ; Silicone oil magnesium oxide powder flows into the copper sheath through the fixed core tube. The length of the stainless steel fixed core tube is 3940mm. It is fixed to the magnesium ox...
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