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Bore welding method of heat exchange tube and tube plate in heat exchanger

A welding method and heat exchange tube technology, applied in welding equipment, hollow objects, arc welding equipment, etc., can solve problems such as effusion corrosion, difficulty in repairing, and damage to weld seams, so as to eliminate welding stress, avoid effusion corrosion, The effect of excellent welding performance

Active Publication Date: 2011-08-10
SICHUAN BLUSR MACHINERY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, due to the existence of the annular groove on the tube plate in this welding method, the corrosive liquid in the annular groove cannot circulate with the shell side medium, so it is easy to form effusion corrosion, damage the weld and make it difficult to repair

Method used

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  • Bore welding method of heat exchange tube and tube plate in heat exchanger
  • Bore welding method of heat exchange tube and tube plate in heat exchanger
  • Bore welding method of heat exchange tube and tube plate in heat exchanger

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Embodiment Construction

[0020] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0021] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0022] Such as figure 1 with figure 2 As shown, the welding method of the inner hole of the heat exchange tube and the tube plate in the heat exchanger of the present invention first processes the round hole 2 on the tube plate 1, and requires that the diameter of the round hole 2 is 0.1-0.1% larger than the outer diameter of the heat exchange tube 3 0.3mm, here is designed to be 0.15mm; then the welding end of the heat exchange tube 3 is l...

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Abstract

The invention discloses a bore welding method of a heat exchange tube and a tube plate in a heat exchanger, comprising the following steps: processing a circular hole (2) on the tube plate (1), overlapping the welding end of the heat exchange tube (3) on the circular hole (2) of the tube plate (1) during the welding process, performing bore welding at the joint, and inserting the welding end of the heat exchange tube (3) into the circular hole (2) by 0.3-1.8 mm, wherein the diameter of the circular hole (2) on the tube plate (1) is 0.1-0.3 mm larger than the external diameter of the heat exchange tube (3). By welding the heat exchange tube and the tube plate with the method, the invention improves the welding quality and effectively avoids crevice corrosion and deposit fluid corrosion after welding. The bore welding method of a heat exchange tube and a tube plate in a heat exchanger has simple technological operation and excellent welding performance, greatly improves the quality of the heat exchanger and prolongs the service life.

Description

technical field [0001] The invention relates to a welding method, in particular to an inner hole welding method of a heat exchange tube and a tube plate in a heat exchanger. Background technique [0002] Heat exchangers are widely used in petrochemical and other industries. The welding of heat exchange tubes and tube sheets is an important process in the manufacture of heat exchangers. Therefore, the welding quality of heat exchange tubes and tube sheets directly determines the quality of heat exchangers. The pros and cons of quality and service life. [0003] The welding of heat exchange tubes and tube sheets in traditional heat exchangers is as follows: figure 1 As shown, the fillet joint structure is mainly used, that is, the heat exchange tube is penetrated into the front end of the tube sheet to be welded to form a fillet weld, including three types of joints: flat fillet weld, protruding fillet weld and inner fillet weld. In this welding method, since there is a gap ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/028B23K101/14
Inventor 张泽顺梅奇罗华林刘代富张继云罗晓成向仕荣李华郭支左彭大舟
Owner SICHUAN BLUSR MACHINERY
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