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Manufacture of fine-type stainless steel plate heat exchanger

A technology of plate-fin heat exchanger and fin heat exchanger, which is applied in the direction of manufacturing tools, metal processing equipment, welding equipment, etc., can solve the problems of high pressure resistance, high temperature resistance and corrosion resistance of the heat exchanger, etc. Achieve the effects of good air tightness, less impurity content and low cost

Inactive Publication Date: 2004-12-29
NANJING TECH UNIV
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  • Abstract
  • Description
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Problems solved by technology

However, for the manufacture of stainless steel plate-fin heat exchangers, copper-based solder is mainly used for brazing at present. This type of heat exchanger is not resistant to high temperature, high pressure and corrosion.

Method used

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  • Manufacture of fine-type stainless steel plate heat exchanger
  • Manufacture of fine-type stainless steel plate heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Refer to attached figure 1 , the manufacturing process of stainless steel plate-fin heat exchanger is:

[0015] 1. Parts preparation

[0016] (1) Partition. It is produced by a special manufacturer, and the material is cut according to the required length when manufacturing the plate-fin heat exchanger. The separator is generally a thin plate of 0.2 mm.

[0017] (2) Seals. It is a special profile, which can be obtained by cold drawing or hot extrusion. It is produced by a special manufacturer, and it is cut according to the required length when manufacturing the plate-fin heat exchanger.

[0018] (3) Fins. Its main forming methods are stamping and rolling, each with its own characteristics, and automatic forming machine tools are used in mass production. The fins are made of stainless steel sheets with a thickness of 0.1-0.4 mm, stamped into a blank shape with a forming die on an automatic forming machine, and then shaped with a concave and convex die. Feeding, c...

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Abstract

The production method of austenitic stainless steel plate fin heat exchanger includes the following steps: part preparation: partition, sealing strip, fin, sealing head and connecting pipe preparation; cleaning before welding; acid pickling to remove oil, dirt and oxide, and using high-pressure water to wash; element assembling and holding; vacuum braze welding, adopting argon arc welding to weld scaling head and connecting pipe, making general assembly; test and inspection, making x-ray inspection, helium leak detection, flow resistance test, pressure test, TUV, ASME and other test and inspection. Said invented process raise the production quality of said stainless steel plate fin heat exchanger, tensile-strength of connector and its service life.

Description

technical field [0001] The invention relates to a manufacturing method of an austenitic stainless steel plate-fin heat exchanger. Background technique [0002] In petrochemical, refrigeration, medicine, atomic energy, aerospace and other fields, aluminum plate-fin heat exchangers cannot meet the requirements of high temperature resistance, high pressure resistance, and corrosion resistance. With its excellent high temperature resistance, high pressure resistance, corrosion resistance, weldability, processability and ductility, austenitic stainless steel plate-fin heat exchanger has become one of the heat exchange equipment with broad development prospects in these fields. However, for the manufacture of stainless steel plate-fin heat exchangers, copper-based brazing filler metals are currently used for brazing. This type of heat exchanger is not resistant to high temperature, high pressure, and corrosion. Contents of the invention [0003] The object of the present invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/00B23K1/008
Inventor 凌祥周帼彦耿鲁阳涂善东
Owner NANJING TECH UNIV
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