Cable and unshielded and shielded micro-seismic detection cables

Abstract

The invention discloses a cable which comprises conductors, insulating layers, filling strips, an insulating core, a wrapping layer and a sheath. Each conductor includes a center layer which is located in the center and formed by stranding 7 tin-plated copper foil wires leftwards, and an outer layer which is located outside the core and formed by stranding 12 tin-plated copper wires rightwards. Each insulating layer is a perfluorinated ethylene-propylene copolymer layer extruded outside one conductor, the nominal thickness of extrusion is 0.15mm to 0.35mm, and the concentricity is higher thanor equal to 90%. Each filling strip includes a core part formed by aramid filaments and a perfluorinated ethylene-propylene copolymer layer arranged by extrusion outside the core part. The insulatingcore includes at least two conductors and at least two filling strips which are stranded together, the two conductors and the filling strips are alternately arranged, and the stranding direction is leftward. The wrapping layer is arranged by wrapping outside the insulating core. The sheath is arranged by extrusion outside the wrapping layer. The sheath of the product will not crack under the condition of rolling by a vehicle, and the cable can be used in harsh environments.

Description

technical field [0001] The invention relates to the technical field of power cables, in particular to a cable, an unshielded and shielded microseismic detection cable and a preparation method thereof. Background technique [0002] At present, the electronic cables used in search and rescue, security and anti-terrorism, vehicle safety and other fields have the following conditions: 1. The conductor is a single twisted copper wire, which leads to the product being pulled by a high external force and often retracted around a small diameter drum. 2. The insulation is made of polyvinyl chloride or polyethylene, which causes the product to crack when pulled by a relatively high external force, often retracted and retracted around a small-diameter roller, and rolled by an external vehicle, resulting in a short circuit; 3. 1. The filling is made of cotton thread, which has no tensile and load-bearing effect, and the cable is easy to break; 4. The sheath is made of polyvinyl chloride...

AI Technical Summary

Problems solved by technology

[0002] At present, the electronic cables used in search and rescue, security and anti-terrorism, vehicle safety and other fields have the following conditions: 1. The conductor is a single twisted copper wire, which leads to the product being pulled by a high external force and often retracted around a small diameter drum. 2. The insulation is made of polyvinyl chloride or polyethylene, which causes the product to crack when pulled by a relatively high external force, often retracted and retracted around a small-diameter roller, and rolled by an external vehicle, resulting in a short circuit; 3. 1. The filling is made of cotton thread, which has no tensile and load-bearing effect, and the cable is easy to break; 4. The sheath is made of polyvinyl chloride, which causes the sheath to crack when the product is rolled by an external vehicle; 5. The cable cannot pass through the hanging load of 10kg, 10,000 times winding test

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