Abstract
In order to meet the increasing demand for transmission and improve the transmission and economic performance, the development of UHV power grid is the commanding heights of the global transmission technology competition in the future.[1] with the development of welding manufacturing technology, a steel tower with steel tube and flange as main component has been invested in the transmission line. The welding process performance has become an important part of quality assurance for transmission line. In the manufacturing process, thin walled pipe and neck flange welding, because of reducing the pipe diameter and wall thickness, accordingly put forward some new difficulties for its welding process. According to the welding technology characteristics of thin-walled pipe and neck flange, the corresponding welding training process is worked out, and training for relevant employees is carried out, so as to achieve the purpose of controlling the welding process and improve the qualification rate of products at a time.
Highlights
Driven by the growth of energy and electricity demand, the world power grid has experienced the leap from traditional power grid to modern power grid, from isolated urban power grid to trans regional and transnational large power grid. [2]The transmission tower is an important part of UHV transmission lines, in accordance with its components, they can be divided into the form of angle steel tower and steel tower, due to the continuous improvement of modern transmission line voltage level and transmission capacity, large cross-section conductor, double loop and multi loop lines have appeared, tower load and tower size are increasing, The conventional angle steel tower has been unable to meet the design requirements, Steel tube tower due to good mechanical performance won the rapid development and application
The main components are connected by high neck flange welded by welding
In the actual production process, Steel tube towers are mostly completed by automatic welding equipment. when the diameter is less than 273mm, the wall thickness is less than 6.0mm, there are lots of problems, resulting in poor welding, so it is difficult to guarantee the quality
Summary
Driven by the growth of energy and electricity demand, the world power grid has experienced the leap from traditional power grid to modern power grid, from isolated urban power grid to trans regional and transnational large power grid. [2]The transmission tower is an important part of UHV transmission lines, in accordance with its components, they can be divided into the form of angle steel tower and steel tower, due to the continuous improvement of modern transmission line voltage level and transmission capacity, large cross-section conductor, double loop and multi loop lines have appeared, tower load and tower size are increasing, The conventional angle steel tower has been unable to meet the design requirements, Steel tube tower due to good mechanical performance won the rapid development and application. [2]The transmission tower is an important part of UHV transmission lines, in accordance with its components, they can be divided into the form of angle steel tower and steel tower, due to the continuous improvement of modern transmission line voltage level and transmission capacity, large cross-section conductor, double loop and multi loop lines have appeared, tower load and tower size are increasing, The conventional angle steel tower has been unable to meet the design requirements, Steel tube tower due to good mechanical performance won the rapid development and application. In the actual production process, Steel tube towers are mostly completed by automatic welding equipment. In order to ensure good weld formation and quality, manual welding should be used. Semi-automatic CO2 gas shielded welding for melting pole can effectively control the welding quality.
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