Cross-linked polyethylene insulated flame-retardant polyvinyl chloride sheathed computer cable

Abstract

The invention discloses a cross-linked polyethylene insulated flame-retardant polyvinyl chloride sheathed computer cable, which comprises a sheath layer, wherein a total shielding layer is arranged onthe inner side of the sheath layer, a connecting wire is arranged between the total shielding layer and the sheath layer, two symmetrical isolation layers and fillers are arranged on the inner side of the total shielding layer, the two fillers are arranged on the two sides of the two isolation layers respectively, split-phase shielding layers are arranged on the inner side faces of the isolationlayers, two symmetrical insulating layers are arranged on the inner side faces of the split-phase shielding layers, a polyester film belt is arranged between the inner side surface of the split-phaseshielding layer and the outer surface of the insulating layer, and a conductor is arranged between the inner side surfaces of the insulating layers. The cable can provide good flame-retardant performance for a cable core, is prevented from generating a large amount of smoke and toxic gas during combustion to pollute the environment and equipment, and is suitable for occasions with high flame-retardant requirements, such as nuclear power stations, ships, high-rise buildings and subways.

Description

technical field [0001] The invention belongs to the field of optical cable equipment and relates to flame-retardant cable technology, in particular to a cross-linked polyethylene insulated flame-retardant polyvinyl chloride sheathed computer cable. Background technique [0002] Cables include power cables, control cables, compensation cables, shielded cables, high temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. Composed of multi-strand wires and insulating layers, it is used to connect circuits, electrical appliances, etc. Flame-retardant cables mean that under specified test conditions, the sample is burned. After the test fire source is removed, the spread of the flame is only within a limited range. The flame or residual flame can extinguish itself within a limited time. The fundamental characteristic of the flame-retardant cable is that it may be burned out in the event o...

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Problems solved by technology

[0003] The sheath layer and insulating layer of existing fireproof cables are usually made of polyvinyl chloride, but ordinary polyvinyl chloride will produce smoke and corrosive gases when burned, which will pollute the environment and equipment. Therefore, we propose a A cross-linked polyethylene insulated flame-retardant PVC sheathed computer cable, used to solve the problem of smoke and corrosive gas generated when traditional cables are burned

[0004] The utility model patent with the notification number CN208335804U discloses a flame-retardant cable with a pressure-resistant protection structure. An enclosure reinforcement plate is arranged inside the flame-retardant cable body, and the enclosure reinforcement plate bears the impact pressure on the outside of the flame-retardant cable body. Protect the wires enclosed by the enclosure reinforcing plate to prevent them from breaking due to pressure; set a filled flame-retardant plate inside the flame-retardant cable body, and the inside of the filled flame-retardant plate is filled with flame retardants. Once the filled flame-retardant plate is burned When the flame retardant is damaged, the flame retardant slips out to extinguish the burning point inside the built-in cavity and block the spread of the fire; a wire placement frame is set inside the flame retardant cable body, and the wires placed inside the wire placement frame are neatly arranged, which is convenient for different types of cables. The guides are classified and arranged, and it is convenient to operate on a single wire; however, the flame-retardant cable with a pressure-resistant protection structure still has the following problems: First, setting a reinforcing plate and a filled flame-retardant plate inside the flame-retardant cable body will greatly increase the The weight of the cable affects the convenience and safety of the cable use; secondly, when the flame-retardant cable with a pressure-resistant protective structure burns, the flame retardant will slide out after the filled flame-retardant plate burns out, and the filled After the flame retardant board burns out, the fire generally spreads relatively large, and the flame retardant cannot be directed to the fire point to extinguish the fire, so relying solely on the flame retardant may not be able to achieve the fire extinguishing effect, and once the fire extinguishing effect is not achieved, the pressure-resistant The flame-retardant cable with protective structure does not have other measures to prevent the spread of fire, which may cause huge losses; finally, the flame-retardant cable with a pressure-resistant protective structure will produce a lot of smoke and corrosive gases when burning, Pollution to the environment and equipment

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