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Steel-aluminum compounding finned tube and processing method thereof as well as heat exchanger manufactured by same

A technology of steel-aluminum composite and finned tubes, applied in heat exchanger types, indirect heat exchangers, lighting and heating equipment, etc., can solve the problems of reduced tightness of the overall heat exchanger, increased on-site assembly workload, and high cost , to avoid the hot-dip galvanizing process, reduce the assembly workload and ensure the strength

Inactive Publication Date: 2012-03-28
BEIJING LONGYUAN COOLING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the base tube is an aluminum tube with low strength, it is impossible to realize a large-scale overall single-tube radiator, and the length of the heat exchanger must be more than 10m by splicing.
On the one hand, this increases the workload of on-site assembly, on the other hand, it reduces the tightness of the overall heat exchanger, and it is easy to have operational failures such as water leakage and freezing at the splicing parts
In addition, since the heat exchanger is made of pure aluminum, the cost is very high

Method used

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  • Steel-aluminum compounding finned tube and processing method thereof as well as heat exchanger manufactured by same
  • Steel-aluminum compounding finned tube and processing method thereof as well as heat exchanger manufactured by same
  • Steel-aluminum compounding finned tube and processing method thereof as well as heat exchanger manufactured by same

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Embodiment Construction

[0025] The structure of the steel pipe aluminum finned tube described in this embodiment is as attached figure 1 , 2 As shown, the finned tube is composed of a base tube 31 and a plurality of fins 32, wherein the base tube 31 can be selected as an elliptical tube, a round tube or a tube of other shapes. In this embodiment, the elliptical tube is selected to help improve heat transfer. performance. The base pipe 31 is made of a steel pipe coated with an aluminum composite material. The base pipe 31 is rolled and welded, with a wall thickness of 1.5mm.

[0026] The fins 32 described in this embodiment are rectangular fins, which are punched from an alloy composite aluminum plate material by a punching machine, and an oval-shaped pipe-through opening 321 corresponding to the shape of the base pipe 31 is arranged in the middle, and the pipe-through opening 321 A crimp 322 is formed at the hole 321 to facilitate close contact with the base pipe 31 . The fins are provided with f...

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Abstract

The invention relates to a steel-aluminum compounding finned tube and a processing method thereof, as well as a water-air heat exchanger manufactured by the same. The steel-aluminum compounding finned tube provided by the invention is brazed by a parent tube and a plurality of fins, wherein the parent tube is of a complete aluminized steel compounding tubular product with an aluminum layer outer surface, and the fins are aluminium fins provided with through-tube openings in the middle and form curled edges at the through-tube openings. The processing method of the steel-aluminum compounding finned tube provided by the invention comprises the steps of: raw material preparation, punching sheet and tube penetration, finned tube cleaning, soaking with a soldering flux liquid, assembly of a stokehold fixture, brazing in a furnace and the like. The invention is capable of combining the advantages of the steel tube steel fin radiator and the aluminum pipe aluminum fin radiator so as to form a steel tube aluminum fin radiator, thus being favor of improving resistance to corrosion, protecting environment, ensuring strength of the heat exchanger finned tube and improving heat dissipation efficiency of the heat exchanger. Simultaneously, continuous production of a brazing process can be realized, the capacity and quality of the product can be improved and the production cost can be reduced.

Description

technical field [0001] The invention relates to a steel-aluminum composite finned tube and a processing method thereof, in particular to a steel-aluminum composite finned tube composed of steel pipes and aluminum fins, and a water-air heat exchanger made of the finned tube. Background technique [0002] The basic application technical scheme of the water-air heat exchanger used in the surface condensing indirect air cooling system of the existing thermal power plant is as follows: [0003] After absorbing the heat released by the condensation of the exhaust steam of the steam turbine, the circulating cooling water enters the multi-group surface water-air heat exchanger with a large overall size. Use the heat of the circulating cooling water to cool it down to the extent that it can continue to absorb the heat released by the condensation of the exhaust steam of the steam turbine. [0004] In this technical process, the water-air heat exchanger is the key equipment. Its high...

Claims

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Application Information

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IPC IPC(8): F28F1/30F28F21/08F28D1/04B23P15/00
Inventor 彭继业艾西平王焕忠牛宝新洪洋董兆一
Owner BEIJING LONGYUAN COOLING TECH
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