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Composite tube plate, air cooler tube bundle and preparation process

A preparation process and a technology for composite pipes, applied in the field of air coolers, can solve problems such as poor welding quality, peeling off of steel and aluminum, and fracture, and achieve the effect of overcoming cracking and improving welding quality.

Pending Publication Date: 2021-10-29
北京龙乙源环保能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the base pipe is welded to the steel-aluminum composite tube sheet, due to the influence of welding high temperature, it is easy to cause defects such as cracking and peeling of steel and aluminum on the steel-aluminum joint surface.
However, the fracture of the joint surface and the peeling of aluminum and steel can cause poor welding quality of the welded connection between the base pipe and the steel-aluminum composite tube sheet

Method used

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  • Composite tube plate, air cooler tube bundle and preparation process
  • Composite tube plate, air cooler tube bundle and preparation process
  • Composite tube plate, air cooler tube bundle and preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Substrate preparation: According to the design and calculation conditions, the material is selected as Q235B, and the thickness is 18mm. The material is cut by punching and shearing, and the surrounding edges are deburred, smoothed and blunt.

[0107] Preparation of the second groove: one row in parallel is located at the preset tube hole position of the tube plate, the depth is 4mm, the shape is flat, the size is 238×38mm, and the bottom surface and side surface of the second groove are controlled by CNC drilling and milling. The angle between them is 75 degrees, and a sealing groove with a triangular cross-section is opened on the side of the second groove.

[0108] Preparation of filler for welding: the material is aluminum alloy 3003. Firstly, a plate with a thickness of 4.98 mm is punched into a filler for welding with a mold, and the shape corresponds to the second groove.

[0109] Welding part and tube hole preparation: place the welding filler obtained in the pr...

Embodiment 2

[0112] Substrate preparation: According to the design and calculation conditions, the material is selected as Q345R, the thickness is 26mm, and the material is cut by laser cutting. The surrounding edges are deburred, smoothed and blunt.

[0113] Preparation of the second groove: the same as the preparation process provided in Example 1, except that the depth is controlled to be 5mm, the size is 248×38mm, and the angle between the bottom surface and the side of the second groove is controlled to be 77 degrees, and A trapezoidal sealing groove is provided on the side of the second groove.

[0114] Preparation of filler for welding: the material is aluminum alloy 3003. Firstly, a plate with a thickness of 6.27mm is punched into a filler for welding with a mold, and the shape corresponds to the second groove.

[0115] Welding part and tube hole preparation: place the welding filler obtained in the previous step in the second groove, deform it by forging and insert it in the secon...

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Abstract

The invention discloses a composite tube plate, an air cooler tube bundle and a preparation process, and relates to the technical field of air coolers. According to the specific implementation mode, the composite tube plate is applied to the air cooler tube bundle and comprises a base plate, a plurality of tube holes, a plurality of first grooves and a plurality of welding parts, the tube holes are formed in the base plate side by side, and each tube hole is used for installing the end of a base tube of the air cooler tube bundle; each first groove is located in one main face of the base plate and arranged around one tube hole. Each welding part is fixed in the corresponding first groove and used for being connected with the end of the base tube in a welded mode. According to the composite tube plate, the welding part can be arranged in the base plate area welded with the base tube, the welding defect easily generated in the prior art is overcome, and the welding quality is improved.

Description

technical field [0001] The invention relates to the technical field of air coolers, in particular to a composite tube sheet, an air cooler tube bundle and a preparation process. Background technique [0002] The air cooler is also called "air-cooled heat exchanger". It uses ambient air as the cooling medium and sweeps the finned tube outside to cool or condense the high-temperature process fluid in the tube. The air cooler is generally composed of main parts such as tube bundles, tube boxes, fans, shutters and frames, and is widely used in petrochemical, metallurgy, electric power, aerospace and other industries. [0003] Air cooler tube bundles are generally composed of finned tubes, tube sheets and tube boxes. Wherein, the base tube of the finned tube passes through the tube hole of the tube plate and is welded with the tube plate. For the flat tube aluminum finned tubes widely used at present, in order to enable the aluminum finned tubes to be welded on the tube sheet, ...

Claims

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Application Information

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IPC IPC(8): F28F1/02F24F1/24F28F9/02F28F9/18F28F11/00F28F21/08
CPCF28F1/02F24F1/24F28F9/02F28F9/18F28F11/00F28F21/084
Inventor 张建华张靖江洪涛兰文明
Owner 北京龙乙源环保能源科技有限公司