Connecting structure between porous flat tubes and tube plate of aluminum-type air cooler

Abstract

The invention discloses a connecting structure between porous flat tubes and a tube plate of an aluminum-type air cooler. The connecting structure comprises a plurality of porous flat tubes, a tube plate, a tube box and a sealing plate, wherein the porous flat tubes are inserted into tube holes in the tube plate and the sealing plate and are fixedly connected with flanges of the tube holes of thesealing plate to form tube heads, the periphery of the sealing plate is fixedly connected with the tube plate, sealing glue is injected into the spaces between the tube plate and the porous flat tubes, and the tube box is fixedly connected with the periphery of the tube plate to form the connecting structure between the porous flat tubes and the tube plate of the aluminum-type air cooler; and theporous flat tubes are fixedly connected with the sealing plate to achieve the sealing effect of the structure, the tube plate and the tube box are fixedly connected to achieve the pressure-bearing effect, so that the design of the sealing plate and porous flat tube brazing heads is not restricted by the thickness of the tube plate and the machining precision of the tube plate, and the optimal design of the lap joint length and lap joint gap required by the tube head brazing process can be realized. The connecting structure has the advantages of being simple in processing and manufacturing of all components, high in pipe head welding percent of pass, and good in bearing, vibration resistance and sealing performance.

Description

technical field [0001] The invention relates to the technical field of heat exchange equipment, in particular to a connection structure between a porous flat tube and a tube plate of an aluminum air cooler. Background technique [0002] Air coolers are widely used in petroleum, chemical, energy, metallurgy, aerospace and other fields due to their strong cooling and heat dissipation capabilities and water saving. The air cooler 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. In order to increase the heat exchange efficiency, a fan is usually used to enhance the fluidity of the air. At the same time, the base tube Fins are added to enhance heat transfer. According to the shape of the base tube, finned tubes include circular finned tubes, elliptical finned tubes and flat tubes. The windward area is much smaller, which effectively reduces the flow resistance on the air side and reduce...

AI Technical Summary

Problems solved by technology

The traditional connection structure has complicated process, high technical requirements and high cost

[0004] At the same time, due to the thickening of the tube sheet, the overlapping length of the porous flat tube and the tube sheet increases, which destroys the capillary action of the weld, so that the solder cannot fill the welding gap, and the welding quality of the brazed joint between the porous flat tube and the tube sheet is difficult. fulfil requirements

When using fusion welding (TIG, MIG) to weld the porous flat tube and the tube sheet, because the tube wall of the porous flat tube is too thin and the tube sheet is thick, it is easy to burn through the tube wall during welding, and the weld is prone to defects such as pores. The pass rate is low, and the weld area of ​​the formed pipe head is small, and the bearing capacity, vibration resistance and sealing performance are poor

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