A method for laying extra-long cables

Abstract

The invention discloses a method for laying an ultra long cable. According to a programmed path, multiple cable protection tube type cable channels are arranged on a laying path, multiple hydraulic driving devices are arranged on the cable channels, a cable production workshop is assembled at a cable laying start end, and production preparation is performed; before production, cable section structure design can be performed, and cable density is controlled; the known production process is utilized to prepare heavy metal suspension, and the density of the heavy metal suspension is made to be equal to the density of the ultra-long cable; when the ultra-long cable is laid, through controlling opening and closing of a variable diameter sealing device I and a variable diameter sealing device IIin a hydraulic driving device, through injecting or extracting the heavy metal suspension, the cable is advanced along a protection tube; no front traction power is required in the entire laying process; the entire cable line has no intermediate joint, only an extra long cable is required to complete the entire power cable line, and thereby the stability of subsequent use of the power cable lineis guaranteed.

Description

technical field [0001] The invention relates to a cable laying method, in particular to a superlong cable laying method. Background technique [0002] XLPE insulated cable is a kind of power cable using XLPE as insulation material. It has the incomparable advantages of cables such as oil-paper composite insulation; it has simple structure, light weight, good heat resistance, strong load capacity, and does not melt. , chemical corrosion resistance, high mechanical strength; [0003] In the current production process, the insulating layer extrusion head is the key equipment of the three-layer co-extrusion technology. Since the insulating material needs to be melted at high temperature, the insulating material will generate a small amount of carbonization at the nozzle and deposit at the nozzle, forming Residual particles or scabs; residual particles or scabs will change the shape of the spout and directly scratch the main insulation layer (or inner and outer shielding layers)...

AI Technical Summary

Problems solved by technology

[0003] In the current production process, the insulating layer extrusion head is the key equipment of the three-layer co-extrusion technology. Since the insulating material needs to be melted at high temperature, the insulating material will generate a small amount of carbonization at the nozzle and deposit at the nozzle, forming Residual particles or scabs; residual particles or scabs will change the shape of the spout and directly scratch the main insulation layer (or inner and outer shielding layers) of the power cable; it may also fall off and mix into the main insulation layer (or inner and outer shielding layers) of the power cable to form a fault Hidden danger points; therefore, in the production process, after working for a period of time, it is necessary to stop and clean the extruder head and nozzle, and remove the residual particles or scabs formed by carbonization deposition at the nozzle;

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