A welding device and method for a fluoroplastic heat exchange tube and a tube sheet

Abstract

The invention discloses a device for welding an FEP heat exchange tube with a tube plate. The device comprises a welding machine case and an electrical control case, wherein an air supply fan driven by a motor is vertically arranged on the welding machine case; a welding machine die used for positioning FEP single tubes and the tube plate is vertically arranged below the air supply fan; an air supply channel is connected with the welding machine die and the air outlet of the air supply fan in a sealing manner; an electrical control heating plate is arranged in the air supply channel; the electrical control heating plate and the motor are connected with the electrical control case through a wire circuit. The invention further discloses a method for welding the FEP heat exchange tube with the tube plate. The device and the method provided by the invention have the advantages that the FEP single tubes and the tube plate are fusible polymers and can be converted into a viscous flow state after being heated; after the welding temperature of the interface between the FEP heat exchange tube and the tube plate surface reaches the fusing-point temperature of the FEP heat exchange tube and the tube plate, the FEP heat exchange tube and the tube plate can be fused together and the welding purpose can be fulfilled; and the degree of deformation and the energy consumption are low.

Description

technical field [0001] The invention relates to a manufacturing process of a heat exchanger, in particular to a welding device and method for a fluoroplastic heat exchange tube and a tube sheet. technical background [0002] Fluoroplastic heat exchange tubes are chemically inert materials without acid dew point corrosion and have excellent acid corrosion resistance. They can work in almost all media and have no special requirements for heat exchanger tube wall temperature and flue gas acid dew point. It has excellent wear resistance, so using fluoroplastic tubes to make heat exchangers has broad prospects. [0003] During the heat exchange process, in order to prevent the heat exchange pipe from vibrating due to the flow of the heat exchange working medium and improve the stability and reliability of the heat exchanger, the single pipe is fixed by a stainless steel support structure, but the cost of these heat exchange pipe fixing methods is high. The process is complicated...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a welding device and method for a fluoroplastic heat exchange tube and a tube sheet aiming at the problem of the existing fluoroplastic (FEP) heat exchange tube bundle

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