Special drum for cable steam crosslinking

Abstract

Provided is a special drum for cable steam crosslinking. The drum has technological characteristics as a conventional cable and comprises an inner barrel and two side plates; heat insulation rock woolboards are pasted to the outer surface of the inner barrel of the drum and the inner surfaces of the side plates; the side plates of the drum and the side face of the inner barrel are each provided with an air intake hole; a plurality of air pores are formed in a barrel body of the inner barrel; a cable subjected to extruded insulation wraps the drum, and an inner sealed heating space and an outer sealed heating space of the drum are formed by sealing the drum and outer heat insulation canvas; the inner heating space and the outer heating space communicate with each other through the air pores in the barrel body of the inner barrel of the drum; after steam is injected via an inner air inlet and an outer air inlet, the pressure and temperature in the drum can quickly reach the temperatureand pressure conditions required for the cable crosslinking reaction within a short period, the sealing canvas is removed after crosslinking is ended, a whole reel of drum can enter the next procedureto continue to be produced directly after being cooled, and the defects that a current special crosslinking device is large in occupied space, high in energy consumption and long in time consumptionare completely overcome.

Description

technical field [0001] The invention relates to the technical field of cable steam crosslinking equipment, in particular to a special tray for cable steam crosslinking. Background technique [0002] The two-step cross-linking process is a common process for cross-linking in the production process of XLPE insulated cables. Extrusion insulation is the first step, and steam cross-linking is the second step. [0003] In the conventional steam cross-linking process, the extruded and insulated cable reel must be placed in the steam room, and then the steam room is filled with steam. The cross-linking reaction of the insulated wire core takes 4 to 8 hours depending on the thickness of the insulation layer. The construction of a steam room occupies a large space and requires a high investment. A small number of factories design their own or use containers as steam cross-linking rooms. Due to the large space, the insulation effect and sealing performance are poor, and it takes a long...

AI Technical Summary

Problems solved by technology

[0003] In the conventional steam cross-linking process, the extruded and insulated cable reel must be placed in the steam room, and then the steam room is filled with steam. The cross-linking reaction of the insulated wire core takes 4 to 8 hours depending on the thickness of the insulation layer. The construction of a steam room occupies a large space and requires a high investment. A small number of factories design their own or use containers as steam cross-linking rooms. Due to the large space, the insulation effect and sealing performance are poor, and it takes a long time for the steam room to rise to the specified temperature. Long, and the steam consumption is large, and the utilization rate of energy consumption is low; the cables need to use forklifts and other equipment to enter and exit the steam room, and the turnover process takes a long time, which affects the production progress

[0004] The heating of the cable in the steam room is a process of gradually penetrating and heating from the outer layer of the cable reel to the inner layer, resulting in a relatively short heating time and low temperature for the inner layer insulation. After the steam crosslinking is completed, the crosslinking degree of the outer layer insulation is likely to pass However, if the cross-linking degree of the inner layer insulation is unqualified, it will affect the product quality.

In practice, a large number of uncrosslinked cables are used in practice, burying serious safety hazards

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