Welding metal heat exchange tube with outer surface provided with externally convex independent fins

A technology for welding metal and outer surfaces, which is applied in welding equipment, metal processing equipment, tubular components, etc., can solve the problems of impossibility, lower heat transfer efficiency, fin tooth shape, and spacing size limitation, etc., to improve heat transfer Heat exchange efficiency, improve heat transfer efficiency, increase the effect of contact area

Inactive Publication Date: 2009-11-18
杨元恒
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Regardless of the kind of finned tubes, there are the following disadvantages: In order to improve the heat transfer efficiency, the size of the fins needs to be made larger, but in this way, the flow resistance of the fluid is increased and the heat transfer efficiency is reduced; the tooth shape of the fins, The size of the spacing is limited; and because of the single variety, it is impossible to improve heat transfer efficiency and flow performance
In addition, the wall thickness of the seamless steel pipe is uneven, which consumes more materials and increases the production cost

Method used

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  • Welding metal heat exchange tube with outer surface provided with externally convex independent fins
  • Welding metal heat exchange tube with outer surface provided with externally convex independent fins
  • Welding metal heat exchange tube with outer surface provided with externally convex independent fins

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Embodiment Construction

[0023] The present invention is described in further detail by the following examples.

[0024] see Figure 1-Figure 5 As shown, a welded metal heat exchange tube 3 with convex independent fins on the outer surface is composed of a tube body 1 and convex independent droplet-shaped fins 2 arranged longitudinally and longitudinally on the outer surface of the tube body 1 . The independent fins 2 in this embodiment are preferably water-drop-shaped fins, and both their longitudinal and cross-sections are trapezoidal. In this embodiment, the inclination angle a=60° between the long axis of symmetry of each drop-shaped fin 2 and the tube axis, and the longitudinal section and cross-section of each drop-shaped fin 2 are trapezoidal with a small top and a large bottom. , the thickness of the base of the tube body is T=1.2mm, the height of each drop-shaped fin is H=0.8mm, the width of the upper bottom is 1.6mm, the distance between each adjacent drop-shaped fin 2 is 3.4mm, and the hea...

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Abstract

The invention discloses a welding metal heat exchange tube with an outer surface provided with externally convex independent fins. The metal heat exchange tube of the shape and the structure can greatly increase the heat transfer and exchange area, reduce fluid resistance, and achieve the aim of efficiently exchanging heat. The welding metal heat exchange tube with the outer surface provided with the externally convex independent fins is distinguishably and technically characterized in that the outer surface of a metal tube body is fully distributed with groups of externally convex independent drop-shaped fins which are arranged along the longitudinal direction, and the heat exchange tube has an integrated molding and welding structure. The welding metal heat exchange tube can be widely applied to the heat transfer and exchange of industrial production.

Description

technical field [0001] The invention relates to the technical field of metal heat exchange tubes, in particular to a welded metal heat exchange tube whose outer surface is convex independent fins for a heat exchanger. Background technique [0002] Finned tubes are generally used as heat transfer tubes. A higher temperature fluid flows inside the tube, and a lower temperature gas medium flows outside the tube to exchange the two fluids. The existing production method of finned tubes is generally to weld the round tubes first and then weld the fins on the outside of the tubes, and some of them weld the fins on the seamless steel tubes, or directly roll out the fins when manufacturing seamless steel tubes. . Regardless of the kind of finned tubes, there are the following disadvantages: In order to improve the heat transfer efficiency, the size of the fins needs to be made larger, but in this way, the flow resistance of the fluid is increased and the heat transfer efficiency is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F1/12B23K9/16
Inventor 杨元恒
Owner 杨元恒
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