Production process of insect pest prevention waterproof power cable

Abstract

The invention discloses a production process of an insect pest prevention waterproof power cable. The production process comprises the following steps: S1, preparing a conductor; S2, preparing an insulating layer; S3, preparing a cable core; S4, preparing a waterproof and insect pest prevention co-extrusion layer: longitudinally wrapping the cable core prepared in the S3 with a double-sided aluminum-plastic composite belt, tightening the aluminum-plastic composite belt to a size close to the cable core through a horn mold, heating the aluminum-plastic composite belt through a heating device, and enabling plastic surfaces of the aluminum-plastic composite belt to be mutually adhered and tightly adhered together through the heating device to form a first-step radial waterproof layer; after the cable core is coated with the double-sided aluminum-plastic composite belt, adopting a double-layer co-extrusion extruder for double-layer co-extrusion, wherein an inner layer is made of a polyethylene material, the extrusion nominal thickness is 2.0 mm, the inner layer is used as a second-step radial waterproof layer, an outer layer is made of a nylon material, the extrusion thickness is not smaller than 0.2 mm, and the outer layer is used as an insect pest prevention layer; and S5, preparing an outer protective layer. The cable produced by using the process has longitudinal water blockingperformance and radial water blocking performance, and the physical insect pest prevention characteristic is realized.

Description

technical field [0001] The invention relates to the field of cable manufacturing, in particular to a production process of an insect-proof and waterproof power cable. Background technique [0002] At present, the installation environment of power cables is becoming more and more complicated. Some cable trenches (wells) are soaked in water for a long time due to design reasons or other irresistible factors. Some wells (ditches) have a water depth of about 1m. Inspection personnel cannot go down to conduct normal inspections, which affects the quality of cable inspections, and cables are damp or water ingress has a huge impact on cable performance. [0003] If the wires and cables are exposed to moisture or water, their safety performance and performance will be seriously affected. During the power-on process, it is very easy to cause short circuit or sparks in the wire and cable, causing insulation breakdown and short circuit of the wire and cable, and even causing a fire ac...

AI Technical Summary

Problems solved by technology

[0002] At present, the installation environment of power cables is becoming more and more complicated. Some cable trenches (wells) are soaked in water for a long time due to design reasons or other irresistible factors. Some wells (ditches) have a water depth of about 1m. Inspectors cannot go down to conduct normal inspections, which affects the quality of cable inspections, and cables are damp or water ingress has a great impact on cable performance

[0003] If the wire and cable are exposed to moisture or water, it will seriously affect its safety performance and performance

During the power-on process, it is very easy to cause short circuit or sparks in the wire and cable, causing insulation breakdown and short circuit of the wire and cable, and even causing a fire accident in the wire and cable.

Even more deadly, damp and water ingress of wires and cables will also reduce the physical properties of wires and cables, accelerate the aging speed of wire and cable insulation, and reduce service life. The conductor spreads in the longitudinal direction. After the cable is energized, water branches are generated on the side of the main insulation close to the conductor core, which in turn leads to electricity branches, and finally causes the breakdown of the main insulation.

Therefore, the seriousness of the consequences of water entering the XLPE cable

[0004] In addition, some areas in China require cables to have pest-proof properties. Now, chemical methods are used to prevent pests, that is, chemical agents are added to the outer sheath of the cable to achieve pest-proof properties. However, this method may cause cable sheath production personnel. And installation and laying workers have allergies

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