1E-level K3-type electric wire and cable for mouse-and-ant-proof nuclear power station

Abstract

The invention discloses a 1E-level K3-type electric wire and cable for a mouse-and-ant-proof nuclear power station, comprising a wire core, a mouse-and-ant-proof sheath and an outer sheath. The wire core consists of a conductor and an insulating layer covered on the outer surface of the conductor; the insulating layer comprises an internal layer, namely, a crosslinked polyethylene layer, and an external layer, namely, a low-smoke halogen-free flame-retardant polyolefin layer; the mouse-and-ant-proof sheath is covered outside the wire core; and the outer sheath is covered outside the mouse-and-ant-proof sheath. According to the 1E-level K3-type electric wire and cable, a remarkable mouse-and-ant-proof effect of the electric wire and cable is achieved by utilizing a physical method without adding any toxic medicine. The 1E-level K3-type electric wire and cable has excellent performance of no toxicity, high efficiency and durability. Besides, the flame-retardant and low-smoke effect is very remarkable.

Description

technical field [0001] The invention belongs to the technical field of wires and cables, and in particular relates to an 1E-class K3 wire and cable for a rodent-proof nuclear power plant. Background technique [0002] According to statistics, more than 430 nuclear power units have been put into operation in the world, with an installed capacity of 530,000 Mw, accounting for 17% of the world's total power generation. More than the sum of the world's electricity generation in 1958. There are currently 30 reactors under construction in 12 countries. The most widely used nuclear power plant reactors are pressurized water reactors with relatively mature technology and reliable safety. my country's current built Da II Juwan Nuclear Power Plant and Qinshan Nuclear Power Plant (Phase I) and Qinshan Nuclear Power Plant (Phase II) under construction, Lingao Hetian This type of reactor is used in the Bay nuclear power plant. Compared with traditional energy sources, nuclear power is ...

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Problems solved by technology

(5) After termites bite through the outer sheath of the cable and reach the metal sheath, the formic acid secreted by the termites accelerates the oxidation of the metal sheath, which is more likely to cause termite damage. After the metal sheath is damaged, the cable insulation layer is damp. Under the action of electric field, dendritic aging will be accelerated and the insulation strength will be reduced. In severe cases, single-phase grounding short circuit will be caused.

However, these materials mainly rely on the smell or the stimulation of the olfactory and gustatory mucous membranes when they are in contact, and play a repellent role to achieve the purpose of preventing termites. Therefore, during the extrusion process, the materials will emit pungent odors, and necessary operations need to be taken Place ventilation and personnel labor protection measures

In addition, the aging of the outer coating makes the anti-termite agent gradually lose its effectiveness, which has always plagued the popularization and application of this method.

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