Device convenient for steel pipe welding and welding method

Abstract

The invention discloses a device convenient for steel pipe welding and a welding method. The device comprises a welding liner pipe and steel pipes to be welded, two sliding grooves are formed in the welding end of one steel pipe to be welded, one end of each sliding groove is open, the sliding grooves are formed in the axial direction, and the two sliding grooves are symmetrically formed along the axis of the corresponding steel pipe; the outer diameter of the welding liner pipe is matched with the inner diameter of the steel pipes to be welded, the pipe wall of the welding liner pipe is provided with two inserting holes which are symmetrical along the axis of the welding liner pipe, a plug pin is inserted into the inserting holes, the welding ends of the two steel pipes to be welded are connected through the welding liner pipe, and the plug pin arranged on the welding liner pipe is clamped into the sliding grooves of the steel pipe to be welded. According to the device, the technical problems that a truss is difficult to install, and the installing error is large due to the fact that the liner pipe is exposed when field splicing of the steel pipes is conducted are solved, and field construction is convenient; meanwhile, parts of the device can be reused, and therefore the construction cost is reduced.

Description

technical field [0001] The invention relates to a device and a welding method for facilitating the welding of steel pipes. Background technique [0002] In the structure where the rods are steel pipes, the connection of the rods is mostly welding, and the overall assembly of the structure is mostly processed by the factory into segments or pieces, and then transported to the site to complete the overall assembly. The overall assembly of components on site is mostly the splicing connection of segmented or segmented edge members. Groove penetration welding is used for splicing, which has relatively high requirements on the quality of welds. The current conventional method to ensure the quality of welds is welding with lined pipes. The welded liner needs to extend 20 to 30 mm on both sides of the spliced ​​rod, so that the truss segments or fragments on both sides cannot be placed in the designated position. At present, the commonly used mobile truss is segmented or segmented...

AI Technical Summary

Problems solved by technology

The welded liner needs to extend 20 to 30 mm on both sides of the spliced ​​rod, so that the truss segments or fragments on both sides cannot be placed in the designated position

At present, the commonly used mobile truss is segmented or segmented, and the method of returning to welding after the liner is put in is very difficult to construct, it is not easy to ensure the installation accuracy, it is easy to cause welding quality defects, the installation efficiency is low, and there are safety hazards

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