With the development of oil and natural gas energy, the pressure of pipeline transportation continues to increase, and straight seam steel pipes play an irreplaceable role.

The straight seam steel pipe is mainly made of carbon steel, and there is a welded pipe whose surface is parallel to the longitudinal direction of the steel pipe. After the hot-rolled steel coil is formed by a forming machine, the steel coil is deformed into a cylindrical shape and then welded. The edge of the tube blank is heated and melted under a certain extrusion pressure, and finally cooled and formed. It is currently used in a wide range of industries, such as petroleum industry, metallurgical industry, coal mining industry, construction industry, machinery industry, etc.

According to the production process, straight seam steel pipes can be divided into high frequency straight seam steel pipes (ERW steel pipe) and submerged arc welded straight seam steel pipes (LSAW steel pipe). Submerged arc welded straight seam steel pipes are divided into UOE, RBE, JCOE steel pipes according to their different forming methods.

The straight seam steel pipe welding production process is simple, the production efficiency is high, the cost is low, and the development is fast. However, due to the influence of the deviation of the blanking plate and the deviation of the plate, the position of the welding seam will continue to change. At present, the working method of human eye observation and manual adjustment of deviation is adopted. The manual adjustment has the following problems:

1. The observation accuracy is not high: the observation accuracy is generally above 0.5mm;

2. The welding speed is unstable and the manual response speed is slow: the response time is 1 second;

3. It needs to be adjusted in real time by a special person, which requires a large amount of labor and a high production cost;

4. The welding reflectivity of the welded pipe is high, and the wave amplitude is also high. When the probe is translated, the waveform is relatively stable, and roughly the same reflected wave amplitude can be obtained during flaw detection on both sides of the weld.

In order to solve the above problems, intelligent equipment is used to replace manual operation, so that one person can operate multiple equipment without human eye observation, and realize automatic welding.

The existing company has independently developed a straight seam steel pipe tracking system, which uses a line laser generator, an optical sensor and a central processing unit, and uses the principle of optical propagation and imaging to obtain the position information of each point in the laser scanning area.The online real-time inspection of common welds is completed through the internal program algorithm. It has the characteristics of easy installation; simple operation method; high tracking accuracy; strong stability; digital output; Realize the automatic detection of welding seam deviation, adjust the position of the welding gun in real time, liberate the workers, realize high-quality, automatic welding, improve production efficiency and improve welding quality.