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Welding method of tube plate for tube plate heat exchanger

A technology for tube sheet welding and heat exchangers, which is applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve the problems of reduced tube sheet welding quality, uneven heat input distribution, and threats to the sealing performance of heat exchangers. The effect of reducing welding thermal stress, avoiding tube sheet deformation, and avoiding edge blurring and distortion

Active Publication Date: 2019-11-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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AI Technical Summary

Problems solved by technology

Due to the huge number of tube bundles and large area of ​​tube sheets in large tube-sheet heat exchangers, the labor cost of manual welding is high, the production efficiency is low, and it is difficult to ensure the welding quality
In addition, a large number of densely distributed welds will cause serious uneven distribution of heat input in different areas of the tube sheet during welding, which will result in a decline in the welding quality of the tube sheet and serious deformation of the tube sheet. Sealing poses a threat

Method used

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  • Welding method of tube plate for tube plate heat exchanger

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Embodiment Construction

[0047] figure 1 It is the best embodiment of the present invention, below in conjunction with attached figure 1 The present invention will be further described.

[0048] The welding device includes a mechanical arm, a rotating shaft 9 and a welding torch 7. The mechanical arm is installed on the base 1 through the rotation of the main shaft 2. The rotating shaft 9 is installed on the free end of the mechanical arm. The welding torch 7 is installed on one side of the rotating shaft 9 and rotates synchronously with the rotating shaft 9. , the second CCD camera 10 is installed on the rotating shaft 9, the first CCD camera 8 is arranged on the mechanical arm or the base 1, the rotating shaft 9 and the main shaft 2 are all connected with a power unit that drives it to rotate, the first CCD camera 8, the second CCD camera The camera 10, the mechanical arm and the power unit are all connected to the control device.

[0049] The present invention will be further described below in c...

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Abstract

The invention discloses a welding method of tube plate for tube plate heat exchanger and belongs to the technical field of automatic welding. The welding method is characterized in that the welding method comprises the following steps that 1, the welding point of the tube plate heat exchanger and the central position of tube plate welding point are identified; 2, the number of tube plates s and the number of welding layers n are calculated; 3, according to the number of tube plates s, the number of welding layers n and the central coordinate of the welding point of tube plates, a control device formulates the welding plan on the basis of the principle of from the outside to the inside and principle that the mechanical arm drives the welding gun to rotate 90 degrees after each welding; 4, the welding gun (7) can be moved to the welding spot; 5 the second CCD camera (10) identifies and processes the image information of the current welding point, and then obtains the coordinates and radius of a center of the corresponding single tube plate circle; 6, the welding gun (7) welds the tube plate according to the welding plan; and 7, the welding gun (7) welds the not welded tube plates. The welding method of tube plate for tube plate heat exchanger realizes automatic welding, reduces welding heat stress and ensures good sealing property of welding.

Description

technical field [0001] The invention relates to a tube plate welding method of a tube plate heat exchanger, which belongs to the technical field of automatic welding. Background technique [0002] At present, tube-sheet heat exchangers are heat exchangers widely used in petroleum, chemical, metallurgy and other industrial fields. In the production process of tube-sheet heat exchangers, welding and fixing tube sheets and tube bundles is an extremely important part. The quality of tube-sheet welding directly determines whether the heat exchanger can work normally. Due to the huge number of tube bundles and large area of ​​tube sheets in large-scale tube-sheet heat exchangers, the labor cost of manual welding is high, the production efficiency is low, and it is difficult to ensure the welding quality. In addition, a large number of densely distributed welds will cause serious uneven distribution of heat input in different areas of the tube sheet during welding, which will resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23K37/02
CPCB23K31/02B23K37/0252B23K2101/14
Inventor 左海强欧泽平刘国荣国亚东陈磊邢文权陆亚彪张忠岩
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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