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High-flexibility fireproof cable and preparation method thereof

A fire-resistant cable, high flexibility technology, applied in the direction of cable/conductor manufacturing, insulated cables, bendable cables, etc., can solve the problems of weak fire resistance, low flexibility, short service life, etc., and achieve good insulation effect and high flexibility , long service life effect

Active Publication Date: 2016-07-13
DONGGUAN MINXING CABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although the above-mentioned cables have certain flame-retardant and flame-suppressing properties, their flexibility is low and their fire resistance is not strong, so they cannot be used in places with high requirements for fire prevention, and their service life is short.

Method used

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  • High-flexibility fireproof cable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A method for preparing a highly flexible fireproof cable of this embodiment comprises the following steps:

[0061] (1) Preparation of copper conductor 1: preparation of copper conductor 1: the copper rod is drawn and annealed to obtain annealed copper wire, and at least two annealed copper wires are twisted to form copper conductor 1;

[0062] (2) Prepare the cable core: Wrap the ceramic composite tape 2 on the outer surface of the pretreated copper conductor 1, and then extrude a layer of ceramic polyolefin material on the outer surface of the ceramic composite tape 2 to obtain the cable core;

[0063] (3) Prepare the filling layer 4: fill the outer periphery of the cable core with an organic fireproof mud material to obtain the filling layer 4;

[0064] (4) Wrap mica tape on the outer surface of the filling layer 4 to obtain a mica tape wrapping layer 5;

[0065] (5) Coating the thin copper wire braiding layer 6 on the outer surface of the mica tape wrapping layer 5...

Embodiment 2

[0081] A method for preparing a highly flexible fireproof cable of this embodiment comprises the following steps:

[0082] (1) Preparation of copper conductor 1: the copper rod is drawn and annealed to obtain annealed copper wire, and at least two annealed copper wires are twisted to form copper conductor 1;

[0083] (2) Prepare the cable core: Wrap the ceramic composite tape 2 on the outer surface of the pretreated copper conductor 1, and then extrude a layer of ceramic polyolefin material on the outer surface of the ceramic composite tape 2 to obtain the cable core;

[0084] (3) Prepare the filling layer 4: fill the outer periphery of the cable core with an organic fireproof mud material to obtain the filling layer 4;

[0085] (4) Wrap mica tape on the outer surface of the filling layer 4 to obtain a mica tape wrapping layer 5;

[0086] (5) Coating the thin copper wire braiding layer 6 on the outer surface of the mica tape wrapping layer 5;

[0087] (6) Cover the sheath la...

Embodiment 3

[0102] The difference between this embodiment and Embodiment 1 or 2 is that the method for preparing copper conductor 1 in this embodiment is specifically: a copper rod with a diameter of 9 mm is subjected to large wire drawing and annealing to obtain an annealed copper wire with a diameter of 2.5 mm. At least seven annealed copper wires are tightly twisted to form a copper conductor 1; steam is used as a protective gas during the large wire drawing process, and antioxidants are added to the cooling water for annealing treatment. The compression coefficient of the tight twisting is ≥ 0.9, and the steam pressure is 2 atmospheres, the annealing temperature is 370°C.

[0103] Preferably, the copper rod is copper material of TU1, and the purity of the copper is more than 99.97%. Specifically, the addition amount of the oxidant is 3% of the total mass of the cooling water, and the oxidant is antioxidant 1010 and antioxidant Agent 168 is a mixture with a mass ratio of 2:1.

[0104]...

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Abstract

The invention relates to the technical field of the cable, especially to a high-flexibility fireproof cable and a preparation method thereof. The preparation method comprises: wire drawing and annealing processing is carried out on a copper rod to obtain annealed copper wires, and the annealed copper wires are twisted to form a copper conductor; a ceramic composite belt wraps the external surface of the copper conductor obtained by pretreatment and a ceramic polyolefin material is arranged at the external surface of the ceramic composite belt in an extruding mode to obtain a cable core; the periphery of the cable core is filled with an organic fireproof mud material to obtain a filling layer; the external surface of the filling layer is wrapped by a mica tape to obtain a mica tape wrapping layer; the external surface of the mica tape wrapping layer is coated with a fine copper wire braiding layer; and the external surface of the fine copper wire braiding layer is coated with a sheath layer to obtain a high-flexibility fireproof cable. According to the invention, the process of the preparation method is simple and mature; the manufactured cable has high flexibility and excellent fireproof performance and can be applied to a control cabinet, an instrument connecting wire, and home installation with a high requirement; and the service life of the cable can reach 70 years.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a highly flexible fireproof cable and a preparation method thereof. Background technique [0002] With the development of social economy and the significant improvement of people's living standards, people's safety awareness of food, clothing, housing, transportation and related products has gradually increased. Therefore, the safety of electricity use is becoming more and more stringent. In view of the fact that wires and cables are important carriers of power systems, their safety has attracted people's attention. Because the fire-resistant cable can still guarantee the emergency facilities and equipment to maintain a certain running time within a reasonable period of time in the burning state, it will win valuable time and / or create Favorable conditions, so highly valued by the industry. [0003] Known fire-resistant cables mainly contain two kinds of mica tape fire-resistant...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B7/04H01B7/29H01B7/295
CPCH01B7/04H01B7/292H01B7/295H01B13/00
Inventor 吴惠明
Owner DONGGUAN MINXING CABLES
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