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Preparation method of fireproof cable

A technology of fireproof cable and waterproof layer, which is used in cable/conductor manufacturing, conductor/cable insulation, circuit and other directions, can solve the problems of destructive discharge, unstable current, and breakdown of the cable insulation, so as to reduce the risk of fire. Probability, reducing temperature change, preventing the effect of resistance rise

Active Publication Date: 2021-06-29
福建礼恩科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the treatment is not timely, it may cause serious consequences; if the surface temperature of the cable is too high, it will cause a serious fire accident, and if it is light, it will cause the aging of the cable materials to accelerate, the resistance of the cable conductor will increase, and the current will be unstable. Generally, they do not have the ability to dissipate heat, and cannot self-regulate the temperature; in addition, as the use of the cable increases, the insulation part of the cable is susceptible to destructive discharge due to high-temperature oxidation, aging and other factors, and even breakdown, which not only affects the insulation of the cable The structure causes a vicious cycle of damage, and it creates a risk of electric leakage and fire. Existing cables do not have the ability to self-heal and prevent this from happening

Method used

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  • Preparation method of fireproof cable
  • Preparation method of fireproof cable
  • Preparation method of fireproof cable

Examples

Experimental program
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Effect test

preparation example Construction

[0034] see figure 1 and figure 2 As shown, a method for preparing a fireproof cable includes a single conductor 1 made of monofilament drawing, monofilament annealing, and handing over, at least including the following steps:

[0035] ①Extrude the inner insulating layer 2, and wrap the inner insulating layer 2 on the outside of the conductor 1;

[0036] ②The inner waterproof layer 3 is extruded, and the inner waterproof layer 3 is covered with the insulating layer 2;

[0037] ③ Coating the conductive layer 4, coating the conductive layer 4 outside the inner waterproof layer 3 and drying;

[0038] ④ Squeeze the isolation ring 5, extrude the outer conductive layer 4 for a certain period of time, each time for a short time, so that the outer conductive layer 4 is coated with the isolation ring 5, and the adjacent isolation rings 5 ​​are separated by a certain distance to form grooves. During or after the extrusion process, one or more thin wires or conductive strips 18 are pa...

Embodiment 1

[0048] see image 3 , the extruding machine used in step ⑥ comprises an upright inner cylinder 11 and an outer cylinder 12 sleeved outside the inner cylinder 11; The outlet at the lower end of the inner cylinder 11 is slightly larger than the diameter of the isolation ring 5; the inner cylinder 11 and the outer cylinder 12 enclose an extrusion chamber 13 whose diameter gradually decreases from top to bottom; the cable passes through the inner cylinder 11 from top to bottom , and at the lower end of the extrusion cavity 13, the outer waterproof layer 6 extruded by pressure in the extrusion cavity 13 is covered; the inner cylinder 11 is filled with the electrorheological fluid 17, so that the outer waterproof layer 6 is coated at the same time The electrorheological fluid 17 filled in the groove is also coated inside.

Embodiment 2

[0050] see Figure 4 , the device for filling the electrorheological fluid 17 in step ⑤ includes a bullet-shaped cylinder 14 placed vertically; the lower end of the cylinder 14 is connected to an upright heat-conducting connecting pipe 15; the inner diameter of the heat-conducting connecting pipe 15 is isolated from the The diameter of the ring 5 is the same as or slightly larger than the diameter of the spacer ring 5; the cable passes through the cylinder body 14 and the heat-conducting connecting pipe 15 from top to bottom; The cooling liquid is circulated through the heat exchange tube 16 to freeze the electrorheological fluid 17 filled in the groove of the cable passing through the heat-conducting connection tube 15 .

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Abstract

The invention relates to a preparation method of a fireproof cable. The preparation method employs a single conductor formed by monofilament drawing, monofilament annealing and paying, and at least comprises the following steps of: (1) extruding an inner insulating layer, namely coating the conductor with the inner insulating layer; (2) extruding an inner waterproof layer, namely coating the insulating layer with the inner waterproof layer; (3) coating a conducting layer, namely coating the inner waterproof layer with the conducting layer, and drying; (4) extruding isolating rings, namely extruding the isolating rings on the conducting layer at certain intervals, and transiently extruding each time, so that the conducting layer is coated with the isolating rings, the adjacent isolating rings are spaced at a certain distance to form grooves, one or more thin wires or conducting belts are attached to the parallel conductors outside the isolating rings in the extruding process or after the extruding process, and the thin wires or the conductive belts are grounded when the fireproof cable is used; (5) filling the grooves with electrorheological fluid 17, and wrapping the isolating rings with an outer waterproof layer through extrusion; (6) extruding an outer insulating heat-conducting layer, namely coating the outer waterproof layer with the outer insulating heat-conducting layer; and (7) extruding a flame-retardant layer, namely coating the insulating heat-conducting layer with the flame-retardant layer.

Description

technical field [0001] The invention relates to the field of cable manufacturing, in particular to a method for preparing a fireproof cable. Background technique [0002] A cable is made of one or more mutually insulated conductors and an outer insulating layer, which transmits power or information from one place to another. When the power cable passes a certain load current, it will definitely generate heat. The higher the load current, the higher the cable temperature. If the treatment is not timely, it may cause serious consequences; if the surface temperature of the cable is too high, it will cause a serious fire accident, and if it is light, it will cause the aging of the cable materials to accelerate, the resistance of the cable conductor will increase, and the current will be unstable. Generally, they do not have the ability to dissipate heat, and cannot self-regulate the temperature; in addition, as the use of the cable increases, the insulation part of the cable i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B13/06H01B13/22H01B13/24
CPCH01B13/00H01B13/22H01B13/06H01B13/24
Inventor 赖建华
Owner 福建礼恩科技有限公司
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