The cross arm is an angle iron fixed horizontally on the top of the electric pole, with porcelain insulator on it. It is an important part of the pole and tower. It is used to install insulators and fittings to support conductors and lightning wires, and keep a certain safe distance from them according to regulations. According to materials, it can be divided into iron cross arm, porcelain cross arm and synthetic insulation cross arm; Cross arms are divided into cross arms for 10kV and below lines, such as single pole cross arms, gate pole cross arms, lifting arms, lead wire cross arms, etc., and assembly cross arms (straight lines, corners and tension) for 35kV and above lines. The metal used for auxiliary installation of cross arm includes m iron, cross arm connecting plate, support foot, bent plate, hoop, single head bolt, double head bolt, threading nail, etc.
The straight-line cross arm is used to bear the vertical load and horizontal load of the conductor only when the wire is not broken normally; The tension cross arm is used to bear not only the vertical and horizontal loads of the conductor, but also the tension difference of the conductor; The corner cross arm is used to bear not only the vertical and horizontal loads of the conductor, but also the large pulling force of one side conductor. According to the stress condition of the cross arm, the single cross arm is used for the straight pole or the corner pole below 15 degrees, while the double cross arms are used for the corner pole, tension pole, terminal pole and branch pole with the angle between 15 and 45 degrees, and the cross cross arms are used for the corner pole, tension pole, terminal pole and branch pole with the angle above 45 degrees. (double cross arms are used for poles in some areas). The cross arms are generally installed 200mm away from the pole top. The straight-line cross arms should be installed on the power receiving side. The cross arms of corner poles, terminal poles and branch poles should be installed on the pull wire side.
Zunyi xinhuayuan Power Equipment Co., Ltd. was established in 2012 with a registered capital of 20 million yuan. It is an enterprise mainly engaged in the production, manufacturing and hot-dip galvanizing of power rail accessories, power towers, non-standard fittings and various steel structures. Covering an area of 25000 square meters, the company is the only enterprise in Zunyi that has obtained the qualification for galvanizing processing and the production capacity of power towers. Our company is committed to power grid construction services and all construction iron accessories, iron towers, various steel structural parts processing and hot-dip galvanizing anti-corrosion treatment, including high-speed railway industry and communication iron towers, which are also our main products. Since its establishment, in line with the principle of "quality first, customer first", the company has established long-term cooperative relations with many enterprises in a few short years, including Guizhou QianNeng enterprise, Guizhou power line equipment factory, Guizhou power transmission and transformation, Guangxi power line equipment factory, Guangxi power transmission and transformation, Yunnan line equipment factory, Zunyi Guangming company, etc. In addition, our company is also a designated supplier of Chongqing Jiangdian Power Equipment Co., Ltd. and a qualified supplier of Guizhou Power Grid Corporation. Up to now, hundreds of iron accessories and power tower projects have been supplied. The company adheres to the corporate purpose of "prospering the country through industry and carrying out good deeds". In the future, Zunyi xinhuayuan Power Equipment Co., Ltd. will be committed to providing higher quality products and more efficient and attentive services to contribute to the development of China's power industry.
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