High-efficiency internally-toothed high-pressure boiler tube

Abstract

The embodiment of the invention discloses a high-efficiency internally-toothed high-pressure boiler tube. The high-efficiency internally-toothed high-pressure boiler tube comprises an internally-toothed tube and a boiler tube, wherein a layer of middle metal is attached to the outer surface of the internally-toothed tube; the outer diameter of the internally-toothed tube is smaller than the innerdiameter of the boiler tube; the internally-toothed tube is fixed in the boiler tube; and two ends of the internally-toothed tube are welded with two ends of the boiler tube. The inner surface of theboiler tube and the outer surface of the internally-toothed tube are subjected to expansion connection compounding and high-temperature fusion, so that a bimetal compound tube with a high-efficiency heat exchange inner surface can be formed.

Description

technical field [0001] The invention relates to the field of heat exchange tube manufacturing, in particular to a high-efficiency internal tooth high-pressure boiler tube. Background technique [0002] Existing power station boiler pipes are all thick-walled carbon steel pipes or seamless steel pipes, and the inside of the pipes is smooth or has sparse shallow threads. The heat exchange efficiency is low. [0003] At present, there is basically no heat exchange enhancement for the inner surface, and some heat exchange tubes are for the inner surface enhancement, but they are not suitable for high-pressure boilers, usually small-diameter thin-walled tubes, insufficient pressure resistance, and insufficient flow. Contents of the invention [0004] In view of this, an embodiment of the present invention provides a high-efficiency internal-toothed high-pressure boiler tube, which is resistant to high pressure and has excellent heat transfer characteristics. [0005] The embo...

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