Heat-resisting and low expansion double capacity compound material core aluminum twisted wire and its making method

Abstract

The invention relates to a heat-resisting, low inflation double capacity compound material core aluminum stranded conductor and preparation method, the compound material core aluminum stranded conductor is composed of the compound material line core by the ultra long continual textile fiber heat-resisting resin and at least a section is tile shape pure aluminium or electric conduction outer layer with surround the aluminum alloy wire. Its preparation method is: Uses continuously pull-crowd craft to produce the excel in ultra long continual textile fiber strengthen the heat-resisting resin inner layer; Then through second time pull-crowd craft to cladding the outer layer which is formed by low elastical coefficient ultra long continual textile fiber strengthen the heat-resisting resin on the inner layer, namely makes the compound material line core; Again surrounds the tile shape pure aluminum or the aluminum alloy wire outside the compound material line core. The invention aluminum stranded conductor has low thermal-expansion coefficient, after enhances the conductor operating temperature the arc hang does not increase; the invention can long time safe working in 140degree centigrade, the aluminum, the aluminum alloy wire packing rate of the conductor layer is more than or equal to 90%, can double enhance the capacity of the electrical network transports.

Description

technical field [0001] The invention relates to a transmission wire suitable for high-voltage transmission network, in particular to a high-voltage transmission wire made of composite material (non-metal base, resin base) and a conductive layer made of tile-shaped aluminum or aluminum alloy. its preparation method. Background technique [0002] With the sustained and stable development of the total economic volume, energy construction has become the key to sustainable and stable development. Electricity is the main body of energy, and most of the energy must be converted into electricity and then transmitted to users before it can be effectively utilized. Power transmission is the main body of energy transmission, so the national power grid has become the main economic lifeline of a country, and power grid security is also an important part of national security. In 2005, my country's power generation installed capacity reached 500 million kilowatts, and in 2010, my country...

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Problems solved by technology

[0013] Jiangsu Fasten Company has applied for the Chinese utility model patent (patent number: ZL02218508.9) of "glass fiber reinforced composite core aluminum stranded wire". The thermal expansion coefficient of the wire core is high, and its conductive layer is traditional aluminum or Aluminum alloy stranded wire with a circular cross-section does not increase the filling rate of the conductive layer and cannot achieve a significant increase in conductivity

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