Ethylene-propylene rubber insulating mouse-proof insect-proof low-smoke halogen-free flame-retardant direct-current high-voltage cable insulating material used for rail traffic

Abstract

The invention discloses an ethylene-propylene rubber insulating mouse-proof insect-proof low-smoke halogen-free flame-retardant direct-current high-voltage cable insulating material used for rail traffics. The insulating material is formed by the following raw materials by weight: 100 parts of ethylene-propylene rubber, 2.3-3.2 parts of vulcanizing agent, 0.3-1.2 parts of co-vulcanizing agent, 50-67 parts of reinforcing agent, 5-7 parts of microcrystalline wax, 5-7 parts of epoxy soybean oil; 0.8-1.2 parts of coupling agent, 8-10 parts of low-density polyethylene, 5-8 parts of zinc oxide nano-powder, 1.2-1.6 parts of anti-aging agent, 5-7 parts of red lead, 1.0-5 parts of magnesium oxide nano-powder, and 15-25 parts of white carbon black. The ethylene-propylene rubber insulating mouse-proof insect-proof low-smoke halogen-free flame-retardant direct-current high-voltage cable insulating material used for rail traffics has the advantages that the mechanical property and electric property of the direct-current high-voltage cable are enhanced effectively and the weather resistance is excellent.

Description

technical field [0001] The invention relates to the technical field of cable material polymers, in particular to an ethylene-propylene rubber insulation rodent-proof, ant-proof, low-smoke, halogen-free, flame-retardant DC high-voltage cable insulation material for rail transit. Background technique [0002] With the rapid development of my country's urban rail transit industry, the demand for rail transit cables is also increasing. Cities that have opened rail transit in the country include Beijing, Tianjin, Guangzhou, Shanghai, Changchun, Dalian, Chongqing, Wuhan, Shenzhen, Nanjing and so on. Measured according to the three indicators of rail transit construction approved by the State Council, nearly 50 cities across the country have met the needs and conditions of urban rail transit. Rail transit provides a lot of convenience to everyone's life and work, and also improves efficiency. The needs of people's efficient and rapid pace of work and life. According to available ...

AI Technical Summary

Problems solved by technology

At present, most of the DC cables for DC traction power transmission used in my country's rail transit construction are imported from abroad or replaced by AC cables. The cost of importing from abroad is too high, and the insulation design of AC cables is used. Its use characteristics and adaptability to the environment are not good. Suitable for the requirements of modern rail transit DC traction system, so that the transmission stability performance is reduced

[0004] The DC power cables used in China's rail transit for transmission and transport vehicles are currently limited to below 3kV, and their structure has many shortcomings; ordinary DC cables are insulated by cross-linked polyethylene, and cross-linked polyethylene is easy to generate space charges during use Cause breakdown, the sheath is made of flame-retardant PVC material, and the flame-retardant PVC outer sheath will release a large amount of halogen acid gas when burning, which will seriously corrode the surrounding instruments and equipment, and also cause great harm to human health

In addition, if the cable is laid in a place where termites or rats are rampant, the outer sheath will often be corroded by termites or bitten by rats, and in severe cases, it will cause cable breakdown

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