Fireproof cable and production process thereof

Abstract

The invention belongs to the technical field of cables, and discloses a fireproof cable and a production process thereof. The fireproof cable sequentially comprises a fireproof framework, an insulating and heat-insulating layer, conductive cores, a shielding layer, an insulating coating layer, a fireproof filling layer, a mica tape layer and a protective sleeve from the inside to the outside. Theproduction process comprises the steps of drawing and molding the conductive core; conducting composite molding of the conductive cores and the fireproof framework: extruding to form the fireproof framework, and guiding the plurality of conductive cores and the fireproof framework into a wire production system to prepare a composite wire; carrying out filling and coating of the fireproof filling layer and the mica tape layer: feeding the composite wire into a fireproof material filling mechanism to realize filling and forming of the fireproof filling layer, and winding the mica tape layer on the outer side of the fireproof filling layer in cooperation with a tape winding mechanism; and coating the protective sleeve. In conclusion, the uniformity of the fireproof performance of each part ofthe formed fireproof cable is effectively ensured, so that the problem of poor local fireproof performance is avoided, and the safe use of the fireproof cable is met.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a fireproof cable and a production process thereof. Background technique [0002] Cables are the lines used to connect electricity in buildings, and with the rapid development of electricity in today's society, the demand for electricity is also increasing. In this case, the number of fires caused by electricity is also increasing. The reason is that In the process of power transmission, the flame retardancy of the cable is poor. Once overload, short circuit, excessive contact resistance or excessive external heat source occur, it is very easy to cause the cable to catch fire, which in turn leads to a fire. From this we can see that the fireproof cable Design and production have good application prospects. [0003] In the prior art, there is a fireproof cable with certain fireproof performance, but its fireproof performance is limited; this kind of cable includes an o...

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Problems solved by technology

[0002] Cables are the lines used to connect electricity in buildings, and with the rapid development of electricity in today's society, the demand for electricity is also increasing. In this case, the number of fires caused by electricity is also increasing. The reason is that In the process of power transmission, the flame retardancy of the cable is poor. Once overload, short circuit, excessive contact resistance or excessive external heat source occur, it is very easy to cause the cable to catch fire, which in turn leads to a fire. From this we can see that the fireproof cable Design and production have good application prospects

[0003] In the prior art, there is a fireproof cable with certain fireproof performance, but its fireproof performance is limited; this kind of cable includes an outer protective sheath and a plurality of internal wires, and there is a gap between adjacent wires and between the wires and the protective sheath. Filling with refractory material to achieve fireproof effect, but this kind of cable has the problem of uneven filling of refractory material in the production process, which may easily cause some parts of the cable to fail to meet the fireproof standard and affect the safety of use

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