A fireproof cable and its production process

Abstract

The invention belongs to the technical field of cables, and discloses a fireproof cable and its production process, wherein the fireproof cable includes a fireproof skeleton, an insulating heat insulation layer, a conductive core, a shielding layer, an insulating coating, a fireproof filling layer, Mica tape layer and protective cover; the production process includes: wire drawing forming of the conductive core; compound molding of the conductive core and the refractory skeleton: extruding to form the refractory skeleton, and introducing multiple conductive cores and refractory skeletons into the wire production system to obtain Composite wire; filling and covering of refractory filling layer and mica tape layer: feed the composite wire into the fireproof material filling mechanism to realize the filling and molding of the refractory filling layer, and cooperate with the tape winding mechanism to wind the mica tape layer on the refractory The outer side of the filling layer; the covering of the protective sleeve; in summary, the uniformity of the fire performance of the formed fireproof cable is effectively guaranteed, so as to avoid the problem of poor local fireproof performance and meet the safe use of the fireproof cable.

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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