Round pipe welding clamping device

Abstract

The invention discloses a round pipe welding clamping device, and belongs to the technical field of round pipe welding assistance. A round pipe is arranged between a pair of hollow annular jackets, apneumatic suction mechanism is matched with a semiconductor refrigeration box to supply air into the hollow annular jackets, cold air overflows into a hollow cavity and continuously presses a plurality of annularly arranged piston driving mechanisms to push heat conduction arc-shaped clamping pieces to move towards the outer side so as to clamp and fix the round pipe, and cold air guided into thehollow cavity is matched with the heat conduction arc-shaped clamping pieces, so that heat generated by welding of the circular pipe is effectively dissipated outwards for cooling and heat dissipation; and meanwhile, after welding, the interior of the hollow cavity is in a negative pressure state through back suction operation of the pneumatic suction mechanism, on one hand, the multiple heat conduction arc-shaped clamping pieces are effectively moved towards the inner ends of the hollow annular jackets and separated from the outer wall of the circular pipe, and on the other hand, heated air in the hollow cavity is led out to be replaced, so that the requirement for next circulation refrigeration is met.

Description

technical field [0001] The invention relates to the technical field of round pipe welding assistance, and more specifically relates to a round pipe welding clamping device. Background technique [0002] At present, metal round pipes are widely used in most fields such as integrated ceilings, tooling engineering, thermal equipment, machinery industry, petroleum geological drilling, containers, and chemical industry. Truss structures are commonly used in public buildings such as large-span factories, exhibition halls, gymnasiums and bridges. Most of the truss arms in construction engineering are formed by welding a circular tubular chord at both ends with ear hinges or supports. The welds formed by the truss arms after welding are circumferential welds. Due to the stress characteristics of the truss structure, the circumferential welds formed after welding on the truss arms have high requirements in terms of connection strength and other mechanical properties. Therefore, the ...

AI Technical Summary

Problems solved by technology

[0004] This traditional welding method is difficult to operate for round pipes (such as chords) with large length and diameter dimensions and weight

In addition, manual adjustment is often used in the circumferential welding process, which is difficult to meet the welding of a large number of support-connected round pipes. When the round pipe is welded for a long time, the round pipe cannot be fixed stably, which will affect the quality of welding. It is inconvenient to adjust and lock the angle between the tubes; in addition, a certain amount of heat will be generated during circumferential welding, and when the welding temperature at a certain position is too high, it will affect the welding quality of the radial surface of the round tube

Images