Key to flame retardant cable for high pressure coal mine
2023-09-09 13:10:22
The key technology of high-voltage coal mine flame retardant cable can be summarized as:
1) Pre-twisted cage and stranding machines;
2) Ultra-smooth inner and outer semi-conductive shielding materials should be used;
3) Ultra-clean insulating material shall be used, and corresponding impurity detection device shall be provided;
4) Automatic feeding device with ultra-clean material (eliminating environmental pollution);
5) Has a conductor preheating device (increases output and changes thermo-mechanical stress);
6) Extruder with high temperature control precision and high screw pressure (requires low extrusion temperature of 80°C, temperature control accuracy up to ±1°C, screw pressure greater than 200MPa);
7) Use a three-layer co-extruder with a high-efficiency filter device (filters impurities > 0.03 mm).
1) Pre-twisted cage and stranding machines;
2) Ultra-smooth inner and outer semi-conductive shielding materials should be used;
3) Ultra-clean insulating material shall be used, and corresponding impurity detection device shall be provided;
4) Automatic feeding device with ultra-clean material (eliminating environmental pollution);
5) Has a conductor preheating device (increases output and changes thermo-mechanical stress);
6) Extruder with high temperature control precision and high screw pressure (requires low extrusion temperature of 80°C, temperature control accuracy up to ±1°C, screw pressure greater than 200MPa);
7) Use a three-layer co-extruder with a high-efficiency filter device (filters impurities > 0.03 mm).
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