Wide load boiler water cooled wall internal threaded pipe with fins with arc-shaped transition sections
A technology of internal threaded pipe and internal thread, applied in steam boilers, steam boiler accessories, components of steam boilers, etc., can solve the problems of increased energy consumption of feed pumps and increased flow resistance of boilers, and achieve improved heat transfer characteristics and enhanced Turbulence intensity, effect of suppressing deterioration of supercritical heat transfer
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[0023] The present invention will be further described below in conjunction with the accompanying drawings.
[0024] Such as figure 1 As shown, a wide-load boiler water-cooled wall internally threaded pipe with arc-shaped transition section ribs includes a pipe body 1 and internally threaded fins 2 arranged in a spiral shape on the inner wall of the pipe body 1. The internally threaded ribs The angle α between the helical direction of the sheet 2 and the pipe axis direction is 30°-65°; the angle β between the side surface of the internal thread fin 2 and the pipe axis direction is 45°-60°; the internal thread rib The slices 2 are arranged at equal intervals, and the number of fins is 4 to 6.
[0025] Such as figure 2 , 3 As shown, the cross-sectional shape of the internal thread fin 2 of the present invention is an isosceles trapezoid, and the connection surface between its side 2-3 and the fin top surface 2-1 and the pipe body 1 is an arc section, and the top arc surface 2
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