Welding process for hot pipe

Abstract

The invention provides a welding process for a hot pipe, and relates to the field of pipe welding. The welding process for the hot pipe comprises the following steps: first, performing surface treatment on an evaporation section, a condensation section and a connecting pipe, respectively arranging the end part of the evaporation section and the end part of the condensation section in the two endsof the connecting pipe in a sleeving manner, and enabling liquid absorbing cores in the evaporation section and the condensation section to be in contact with each other; under the protection of nitrogen gas, welding by adopting brazing, wherein the welding parts are the parts, which are respectively matched with the evaporation section and the condensation section, of the two ends of the connecting pipe; performing residue removing treatment on a welded part and grinding the welded part; performing vacuumizing treatment on the hot pipe, injecting an evaporating liquid through an air exhaust hole under vacuum condition, and simply closing the air exhaust hole; under the protection of the nitrogen gas, brazing and closing a closing position of the air exhaust hole; and performing residue removing treatment on a brazed part of the air exhaust hole and grinding the brazed part of the air exhaust hole. The liquid absorbing capacity of the liquid absorbing cores cannot be affected by welding the hot pipe through the process provided by the invention.

Description

technical field [0001] The present invention relates to a welding process, more specifically, relates to a heat pipe welding process. Background technique [0002] The heat pipe uses the phase change process in which the medium evaporates at the hot end and condenses at the cold end (that is, uses the latent heat of evaporation and latent heat of condensation of the evaporating liquid) to conduct heat quickly. A general heat pipe consists of a shell, a liquid-absorbing core and an end cap. The inside of the heat pipe is pumped into a negative pressure state and filled with an appropriate evaporating liquid, which has a low boiling point and is easy to volatilize. The tube wall has a liquid-absorbing core, which is made of capillary porous material. One end of the heat pipe is the evaporating section, and the other end is the condensing section. When one end of the heat pipe is heated, the evaporating liquid in the capillary quickly vaporizes, and the steam flows to the oth...

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a heat pipe welding process for the above-mentioned shortcomings in the prior art, and solve the problem that the welding liquid penetrates into the liquid-absorbing core and affects the liquid-absorbing effect

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