Aluminium alloy pipe bus is one of the bus leading products, is the key equipment in the power transmission system (material), the power transmission system and power equipment safety, reliability plays a crucial role in.
Use of aluminum alloy pipe bus
Mainly used in our country in the electric power construction project of power transmission line and substation transformer connection between conductors, transmission line jumper, in power equipment connecting conductor and high current DC ice melting device as over current conductor, is a new conductor, instead of rectangular groove, rod busbar traditional wire and soft, is the key equipment in the power transmission system (material), safety, and reliable operation of the power system and power equipment plays a vital role in.
Properties of aluminum alloy pipe bus
This series of products with unique material properties (LDRE rare earth aluminum alloy, 6Z63 alloy and so on), structure and machining technics, the patent for utility model has 3 utility model patents, has authorized 3 application has passed the first instance of the invention patent, 1 application has been accepted, the conductive material is a new bus energy saving, is the traditional ACSR, groove, rectangular aluminum bus alternative products.
The main performance is reflected in the:
1) tubular conductor (busbar) using the domestic advanced hot top casting of advanced technology, seamless pipe, such as a series of smooth surface, high precision, high tensile strength, not easy to generate discharge and deformation;
2) products using rare-earth, heat-resistant aluminum alloy material company developed (has been declared national invention patents), has excellent machining, welding, conductive and heat resistance. Products by the science and technology department organization identification, reached the international advanced level (bureau of science and technology of Huanggang City Yellow Kejian word [2009] No. first);
3) convection cooling conditions, low temperature rise, low loss, strong conductive ability, large carrying capacity (test reports the Wuhan Institute of "2008 high" cable No. S13);
4) high heat resistance, can increase the tube bus operating temperature (temperature reached 150 ℃ ~ 200 ℃), the mechanical strength of the conductor with high under high temperature, to improve the safety and reliability of power system (Wuhan University of Technology materials research and testing center "test report" No. 2008343);
5) the installation covers an area of small, composite tubular busbar is flexible conductor covers an area of 1/3;
6) corrosion resistance, not easy to ice, anti disaster ability, long service life (the first application in the ice melting device, has been declared national patent);
7) has the advantages of convenient installation, beautiful appearance, safe, stable, reliable, convenient repair and maintenance.
Four, aluminum alloy pipe bus technology:
1) pipe is smooth, and the vertical axis and.
2) tube bus length deviation is positive error: +15 ~ +25mm
3) tube bus permit does not affect the outer diameter of the straightening of spiral groove, the depth is not more than 0.5mm
4) tubular busbar bending: m/L < 2.0mm
5) space liner pipe parent matching is not more than 0.5mm and can ensure the installation need.
6) bus has smooth surface, no crack, wrinkle, inclusions and deformation and distorting phenomenon.
7) pipe base material adopts 6063G series, status: T6
8) the elastic modulus values to control the installation after the disturbance degree value in a specified range.

At the beginning of 2008, South China suffered severe ice disaster not in 50 years, causing great damage to the power supply system, in order to solve the problem of power transmission line icing, electric power design institute in the power supply system increases the high current DC ice melting device, electrical equipment requirements matched must have closure greater ability and higher heat resistance, in order to meet the demand of the market, the company developed high strength heat-resistant aluminum alloy high current DC ice melting device of tubular busbar and supporting the connection fitting, by users, product performance and fully meet the design requirements and the use of electric power, electric power departments of praise. Thermal properties of high strength heat-resistant aluminum alloy tubular busbar is good, in the use of higher temperature (150 ℃ ~ 200 ℃) has high strength, heating to 250 ℃ for one hour, after natural cooling can still keep high mechanical properties, tensile strength, can still maintain a normal 80%, strong ability of anti icing.
Future:
Has been widely recognized gradually by electric power design department and used in electric power engineering aluminium alloy tubular conductor. In recent years, only 220000 V to 500000 volt power transmission engineering application, annual volume of tubular conductor increase rate of 25-30%. According to the development trend of power, tubular conductor as a new current carrying conductor, will take advantage of its huge, in line, a power device, hair, instead of rectangular groove, rod busbar tradition and soft wire each field of electric system, leading the new trend of electric power material, show the huge development space.