Enclosed nose for butt welding of high-temperature fused salt collector tubes

Abstract

The invention discloses an enclosed nose for butt welding of high-temperature fused salt collector tubes; the enclosed nose comprises an insulating body, a handle and a harness. The enclosed nose of the invention is simple in structure, small in size and convenient to use and is particularly suitable for welding operations with a gap of less than 36 mm where the nose may enter for welding; a plate pressure spring is arranged on one side of a C-shaped gear of the insulating body, so that good contact is ensured between the C-shaped gear and a copper sleeve, and stable power supply for welding is ensured; a housing of the insulating body includes two parts fastened in closing manner, so that equipment maintenance and detection are facilitated, time wasted for nose maintenance is shortened, and welding efficiency is improved indirectly.

Description

technical field [0001] The invention belongs to the field of welding equipment, in particular to a closed head for butt welding of high-temperature molten salt heat collecting tubes. Background technique [0002] In the prior art, argon tungsten arc welding is mostly used for welding stainless steel pipes, and the head of the argon tungsten arc welding machine includes an open head and a closed head. [0003] The open head has higher requirements on the welding position, mainly for the welding of horizontal fixed pipes and surrounding unobstructed pipes; the open head has higher requirements on the welding environment, and it needs to be operated in a well-sealed factory building or production workshop. If it is necessary to build a windproof shed in the field, the wind speed should be less than 2M / s, and attention should also be paid to rainproof and moisture-proof work; the wire feeding mechanism of the open head and the tungsten electrode must maintain a certain angle. On...

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Problems solved by technology

[0003] The open head has higher requirements on the welding position, mainly for the welding of horizontal fixed pipes and surrounding unobstructed pipes; the open head has higher requirements on the welding environment, and it needs to be operated in a well-sealed factory building or production workshop. If it is necessary to build a windproof shed in the field, the wind speed should be less than 2M / s, and attention should also be paid to rainproof and moisture-proof work; the wire feeding mechanism of the open head and the tungsten electrode must maintain a certain angle. Once there is an angle deviation, it will affect The whole welding process; when using the open head to butt weld the high-temperature molten salt heat collector tube, additional lifting equipment is required to assist, and the auxiliary tooling adjustment takes a long time, and because the outer tube of the heat collector The heat collecting tube is easy to damage the heat collecting tube; when the open head welds the 3mm thick stainless steel high temperature molten salt heat collecting tube, the requirements for the assembly gap of the weld seam are relatively high, and a bevel needs to be opened, and the bevel on one side is 30°±2 °, the weld gap is 0, which increases the difficulty and cost of welding

[0004] When two 3 mm thick stainless steel high-temperature molten salt heat collecting tubes are butt welded, the gap between which the head can enter for welding is less than 36mm, while the thickness of the closed head of the existing automatic tungsten argon arc welding machine is the thickest The thin one is 36mm, and it is impossible to carry out butt welding of 3mm thick stainless steel high temperature molten salt collector tube with a gap less than 36mm

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