A metal pipe welding heat exchange device

Abstract

The invention discloses a heat exchange device for welding of a metal pipeline. The heat exchange device comprises multiple sections of arc-shaped plate type heat exchange pieces, inter-section connecting pins, inter-section connecting pipes and adjusting bolts; each arc-shaped plate type heat exchange piece comprise an arc-shaped red copper plate, foam copper, a sealing ring, an arc-shaped stainless steel casing and compression bolts; the multiple sections of arc-shaped plate type heat exchange pieces are in chained connection through the inter-section connecting pins; the inter-section connecting pipes are arranged at water inlets / outlets of the adjacent arc-shaped stainless steel casings correspondingly; the adjusting bolts are arranged on the last section of arc-shaped plate type heatexchange piece after chained connection and is connected with the first section of arc-shaped plate type heat exchange piece so as to fix the whole heat exchange device for welding of the metal pipeline to the outer wall of the pipeline. The heat exchange device has the beneficial effects as follows: the arc-shaped red copper plates are closely attached to the outer wall of the pipeline, the contact surface is large, and the heat exchange efficiency is high; and the heat exchange device can adapt to welding of pipelines in various different diameters, has the wide application range and is convenient to mount and dismount, the equipment cost is saved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of pipe welding, in particular to a metal pipe welding heat exchange device. Background technique [0002] When welding metal pipes, in order to ensure the welding quality and reduce welding cracks, there are strict requirements on the welding temperature in many cases: for example, when the wall thickness of carbon steel and low alloy steel is greater than a certain thickness, it must be preheated before welding; austenitic stainless steel, aluminum And aluminum alloy, titanium and titanium alloy, nickel-based nickel alloy, zirconium and zirconium alloy welding must strictly control the interpass temperature (interpass temperature ≤ 100 ℃ or 150 ℃), etc. The traditional pipeline preheating methods include flame heating and electric heating, but there are disadvantages of uneven preheating and high cost; traditional inter-channel temperature control mostly adopts natural cooling or cooling with wet rags. Th...

AI Technical Summary

Problems solved by technology

The traditional pipeline preheating methods include flame heating and electric heating, but there are disadvantages of uneven preheating and high cost; traditional inter-channel temperature control mostly adopts natural cooling or cooling with wet rags. There are shortcomings such as long waiting time, low welding efficiency, and sluggish labor. When using a wet rag to cool down, there are shortcomings such as poor cooling effect and affecting the metal structure of the weld.

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