Inner wall overlaying system for 90-degree elbow

Abstract

The invention relates to welding equipment, in particular to an overlaying system of an inner wall overlaying machine for a 90-degree elbow. The system comprises a platform, a clamp assembly, an upright post assembly, a cross arm assembly, a rotary assembly and a translation guide rail assembly, wherein the translation guide rail assembly is integrally and transversely fixed at one sides of the platform and the clamp assembly and provided with the rotary assembly capable of moving on a linear guide rail of the translation guide rail assembly; the upright post assembly is fixed on a rotary support on the rotary assembly; a vertical guide rail of the upright post assembly is provided with a vertical move sliding plate, a transverse guide rail of the cross arm assembly is provided with a transverse move sliding plate, and the vertical move sliding plate and the transverse move sliding plate are connected and fixed; and the cross arm assembly is provided with a welding nose through a connecting arm. The system can realize circumferential annular all-position overlaying and has the oscillating function of a welding gun, and the oscillating amplitude gradually enlarges from inside to outside along with the radius of the elbow so as to guarantee that the overlaying thicknesses of all points of the inner wall are consistent. The system not only can be used for welding 90-degree elbows, but also can be used for welding combinations of straight pipes and elbows, thereby improving the utilization rate of welding systems.

Description

Technical field [0001] The invention relates to welding equipment, in particular to a 90° elbow inner wall surfacing system. Background technique [0002] The inner wall of the welded elbow pipe of the present invention is mainly used in the hydrogenation reactor device. When working, it must be operated under the harsh environment of high temperature, high pressure, hydrogen and hydrogen sulfide, and acid corrosion. This requires the use of hydrogen resistant steel as the base material, and Stainless steel must be surfacing welded on the inner wall in contact with the medium. Existing surfacing equipment itself has structural defects that make it impossible to directly weld the inner wall of the 90° elbow, and it is generally used to divide the 90° elbow into three 30° elbows, and then use the surfacing equipment on its inner wall The process of surfacing welding and then connecting the two interfaces of the three sections for welding. This process has many procedures and is r...

AI Technical Summary

Problems solved by technology

There are structural defects in the existing surfacing welding equipment itself, which makes it impossible to directly weld the inner wall of the 90° elbow. However, it is generally used to divide the 90° elbow into three sections of 30° elbow, and then use the surfacing equipment to weld the inner wall of the 90° elbow. The process of surfacing welding and then connecting the two interfaces of the three sections for welding

This process has many procedures and is cumbersome, and it is easy to produce welding defects at the three-section connection, which affects the durability and safety of the pressure vessel

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