Interview of R & D and application of CPP900 for automatic welding of large-slope pipelines
来源： http://tzhangli.com点击： Date: 2016-05-23 00 : 00Source : http : //tzhangli.comClick :
PetroChina must be created by China. If PAW2000 and PAW3000 make the pipeline bureau's automatic welding equipment take the world-class pace, CPP900 brings revolutionary changes to the domestic pipeline automatic welding equipment. The slope automatic welding equipment brings the integrity of the pipeline construction. It makes it possible for domestically produced automatic welding equipment to compete with international advanced products, and once again enriches domestically produced automatic welding products, types and applications.
In May 2014, the Natural Gas and Pipeline Branch organized a "Seminar on the Application of Full-Automatic Welding and Mechanized Filling Technology for Oil and Gas Pipeline Engineering". Participants believed that it is necessary to further increase the promotion of automatic welding and expand the applicable terrain for automatic welding. The Pipeline Bureau took on this heavy task and began to focus on the group company's topic "Research on new technologies for efficient welding of oil and gas pipelines."
On May 16, the reporter came to the Construction Equipment Research Institute of the Pipeline Bureau Research Institute for an interview. Director Zhang Feng said that to overcome the limitation of automatic welding on terrain, the challenges mainly come from two aspects.
Traditional automatic welding equipment requires that the pipeline be laid as gently as possible. When the slope changes, technical bottlenecks occur: one is the structure of the internal welding machine, the control system and the selection of key components, and the other is the adjustment of the welding parameters of the external welding machine. .
For the original internal welding machine, if the slope exceeds 12 degrees, the walking machine cannot pull the internal welding machine to crawl in the pipeline when it is going up; when it goes down, the walking machine cannot stop the car and it is difficult to ensure the opposite position.
When welding with an external welding machine, the slope is less than 20 degrees, which has no effect on the formation of the weld, and the difficulty mainly occurs between 20 degrees and 30 degrees. When the slope reaches 20 degrees to 25 degrees, due to the influence of gravity, the molten pool will drop at the vertical and overhead welding positions, that is, the welding seam is not well formed and defects are easy to be formed. After the slope exceeds 25 degrees, the molten pool will fall It will be more obvious, and with the unstable arc state, problems such as poor directivity will occur.
For example, Zhang Feng said, "Taking the simplest power supply, the performance of different brand manufacturers is different. When the welding slope changes, poor power performance will affect the arc and reduce the qualification rate of the weld."
"Internal welders need to re-select and adjust structural components, control systems, etc., and to solve welding parameter problems, repeated tests are required. Each test must go through the formulation of a welding process plan, welding commissioning, welding seam testing, etc. Series of processes, and finally improve the welding process. "Zhang Qian, a researcher of the research group, said.
Each attempt is a transmutation, and each experiment is devoted to the efforts of researchers, and these efforts and efforts have finally been successful.
After two years of hard work, the Pipeline Bureau has developed a CPP900-IW pipeline welder with super strong ability to ascend and descend and is suitable for slope welding construction, and has formed a supporting large-scale automatic welding welding process and automatic welding slope construction organization plan. , Achieved a new technological breakthrough.
"Special Edition" large-slope automatic welding equipment can perform stable walking and welding on up and down slopes with a slope of 30 degrees or less, breaking through the technical bottleneck of automatic welding equipment that can only be used in plain areas, and expanding automatic welding. Application range. The matching automatic welding welding process can ensure the quality of girth welded joints under the condition of a slope of 30 degrees or less by changing the welding heat input and the welding gun swing parameters and other measures, breaking through the formation and defects of the weld in the slope of 20 to 30 degrees Technical difficulties such as control have filled the gaps in the construction technology of automatic welding of sloping pipelines in China, increased the qualification rate of one-time welding, and formed the core technology of automatic slope welding with independent intellectual property rights.
Recently, large-slope automatic welding conducted on-site observation and discussion at Jiangsu Xuzhou Pipeline Second Company. At the simulated construction site, the newly developed automatic welding equipment and process successfully achieved automatic welding construction under the conditions of a full 12 meters and a slope of 31.2 degrees. Its outstanding performance has won praise from relevant experts.
"The core technology and equipment developed by the Pipeline Bureau for automatic welding can climb up to a 30-degree slope, break through the limitation of the regional use of automatic welding equipment, and expand the scope of automatic welding. With this set of technology and equipment Automatic welding can also 'over the mountains and mountains'. Moreover, this set of equipment has reliable braking, precise and controllable speed, safe and reliable during the uphill and downhill walking. "The visiting representatives evaluated the pipeline welding technology and equipment in this way.
"Science and technology innovation must focus on the transformation and application of results, and take resolute and effective measures to continuously improve the quality and efficiency of scientific and technological innovation." Zhao Yujian, director of the pipeline bureau, has repeatedly emphasized that the vitality of scientific and technological innovation lies in the transformation and application of results, and the greatest value lies in the transformation and application of results. .
For the "special edition" of domestic automatic welding, only successful promotion and application can give it greater value.
"If the large-slope automatic welding equipment wants to reach the market, it still needs to obtain the production license, qualification certification, and even international product license certification. We still have a lot of work to do." Zhang Feng looked far away.
"In the past, everyone didn't believe in domestic equipment. Through the technological improvements in recent years, everyone was convinced slowly. I believe that as long as one thing is done to the extreme, the prospect must be bright." Zhang Feng is full of confidence in the future.
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