A new type of welding groove for large steel pipe
A technology for welding grooves and steel pipes, applied to the edge of workpieces, metal processing equipment, manufacturing tools, etc., can solve the problems of high weld strength, low welding efficiency, and difficult welding, and achieve the effect of increasing welding strength
Active Publication Date: 2018-06-19
渤海石油装备福建钢管有限公司
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Problems solved by technology
The construction process of the water pipeline is as follows: Usually, when steel pipe products are processed, the entire circumference of the steel pipe end is beveled on the outer surface. Butt welding, the welding operation of the entire circumference involves flat welding, vertical welding and overhead welding. The weld seam produced in this way has high strength and can withstand high conveying pressure, but the welding is difficult and the welding efficiency is low
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[0017] Below in conjunction with accompanying drawing and specific embodiment, the present invention will be described in further detail: as figure 1 , figure 2 and image 3 A new type of welding groove for a large steel pipe is shown, including a first outer groove 1 and a second outer groove 2 arranged along the outer wall of the upper half-circle of the nozzle, and a second outer groove 2 arranged along the inner wall of the lower half-circle of the nozzle. First inner groove 3, second inner groove 4, one end of the first outer groove 1 is connected with the outer surface of the pipe body, the other end is connected with one end of the second outer groove 2, and the second outer groove The other end of the groove 2 is connected with the blunt edge 5 of the upper pipe of the semi-circular ring, one end of the first inner groove 3 is connected with the inner surface of the pipe body, and the other end is connected with one end of the second inner groove 4, so The other end...
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Abstract
The invention discloses a novel welding groove of a large steel pipe, and relates to the technical field of large steel pipe welding. The novel welding groove comprises a first outer groove body, a second outer groove body, a first inner groove body and a second inner groove body. One end of the first outer groove body is connected with the outer surface of a pipe body, and the other end of the first outer groove body is connected with one end of the second outer groove body. The other end of the second outer groove body is connected with a semicircular upper pipe truncated edge, one end of the first inner groove body is connected with the inner surface of the pipe body, the other end of the first inner groove body is connected with one end of the second inner groove body, and the other end of the second inner groove body is connected with a semicircular lower pipe truncated edge. The included angle a between the first outer groove body and the outer surface of the pipe body is smaller than the included angle a' between the second outer groove body and the outer surface of the pipe body, and the included angle b between the first inner groove body and the inner surface of the pipe body is smaller than the included angle b' between the second inner groove body and the inner surface of the pipe body. By means of the groove, when the pipelines are butt-welded, labor intensity and difficulty are reduced, and the weld appearance and strength meet technological requirements.
Description
technical field [0001] The invention relates to the technical field of large steel pipe welding. Background technique [0002] Steel pipe has a long history of application and a wide range. It is a traditional form of transportation. Steel pipes for water transportation generally use spiral welded pipes or straight seam welded pipes, which have the advantages of high strength, high reliability, and strong adaptability. The construction process of the water pipeline is as follows: Usually, when steel pipe products are processed, the entire circumference of the steel pipe end is beveled on the outer surface. Butt welding involves flat welding, vertical welding and overhead welding on the entire circumference. The weld seam produced in this way has high strength and can withstand high delivery pressure, but the welding is difficult and the welding efficiency is low. [0003] Therefore, a new type of groove is needed to make welding convenient, reduce welding difficulty and imp...
Claims
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IPC IPC(8): B23K33/00
CPCB23K33/00
Inventor 韩秀林李汝江闵详玲王洁何森刘宏博贺晓清和黄燦
Owner 渤海石油装备福建钢管有限公司