Multiple thin wall titanium tube and steel tube sheet hole simultaneous explosive welding composite tube sheet and method

Abstract

Provided are a multiple thin wall titanium tube and steel tube sheet hole simultaneous explosive welding composite tube sheet and a multiple thin wall titanium tube and steel tube sheet hole simultaneous explosive welding method. The multiple thin wall titanium tube and steel tube sheet hole simultaneous explosive welding method includes following steps: first, filling thin wall titanium tubes with explosives obtained through an optimized formula, wherein the wall thickness of the thin wall titanium tubes is 1-2mm, the optimized formula consists of components by weight part: 60-70 parts of theexplosives and the balance of ingredients composed of salt, perlite and saw powder, and the weight ratio of the salt, the perlite and the saw powder in the ingredients is 2:1:1; exposing unstable detonation ends out of two surfaces of a steel sheet separately by 2-10cm in explosive loading; secondly, controlling the distance between the outer wall of each thin wall titanium tube and the inner wall of each steel tube sheet hole as S=0.2*(delta+h), wherein the h is the thickness of titanium steel obtained after explosive forming, the delta is the diameter of the filling explosives, and the h isfar less than the delta; thirdly, using a series firing network for connecting all detonators, and controlling the length of a firing circuit within 200m. The multiple thin wall titanium tube and steel tube sheet hole simultaneous explosive welding method not only can guarantee safety of a heat exchanger, but also greatly prolongs use life of the heat exchanger, is high in production rate, can achieve welding forming of all tubes and tube sheets of the whole heat exchanger at a time.

Description

technical field [0001] The present invention relates to a kind of welding method, especially a kind of explosive welding method, specifically a kind of synchronous explosive welding a plurality of thin-walled titanium tubes and steel tube plate hole composite tube plate and method. Background technique [0002] As we all know, the close fit between heat exchange tubes and tube sheets of heat exchangers used in the chemical industry not only affects the service life of the heat exchanger, but also involves the safety of the high-pressure heat exchanger. The connection of tube and tube sheets of high-pressure heat exchangers generally adopts the method of expansion joint + welding. Expansion joint is to make the diameter of the end of the heat exchange tube extending into the hole of the tube sheet expand under the action of load, resulting in plastic deformation, while the tube sheet is still in the range of elastic deformation. After the load is removed, the tube and the tub...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the quality of explosive welding between existing thin-walled titanium tubes and steel plates is difficult to control, and to invent a method that is simple and easy to control and can simultaneously complete the explosive welding of multiple thin-walled titanium tubes and steel plates at one time

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