CN201078733Y - Corrugated spiral heat exchanging tube - Google Patents

Abstract

A helix-wave heat exchanging pipe is provided, which comprises a forged helix wave section and a round section part with two smooth ends. The utility model is characterized in that: the inner and the outer surface of the helix wave section are both provided with continuous helix wave walls. Compared with the prior art, the utility model enlarges the heat exchanging area inside and outside the pipe and, at the same time, makes the fluid in pipe generate stronger wave-rotating perturbance; the expanding heat exchanging area outside pipe and similar with that of the helix heat pipe; the flowing speed of the heat exchange media at the close wall of inside the pipe is increased; the reinforced heat transmission effect inside the pipe is obvious; the double-face reinforced heat exchanging pipe; therefore, the utility model belongs to reinforcing inside and outside pipe, which has good reinforced heat transmission effect, small flowing resistance, uneasy for piling and high press forging efficiency as well as low cost.

Description

Corrugated spiral heat-exchange tube

Technical field

The utility model relates to a kind of heat exchanger tube, particularly relates to a kind of corrugated spiral heat-exchange tube of augmentation of heat transfer, is to the improvement of existing heat exchange tube structure, belongs to the heat exchange element technology.

Background technology

The augmentation of heat transfer heat exchanger tube of the general normal employing of existing shell-and-tube heat exchanger is various informative, for example, publication number is the Chinese invention patent application " rhombus thermoexcell " of CN1447089, it is made up of some rhombus pipeline sections, oval pipeline section, circle-oval changeover portion, the two ends cross section of described rhombus pipeline section is for intersecting 15～an angle of 90 degrees between oval and two transverses, reduce gradually to the ovality that the center changes its cross section by the pipeline section two ends, become circle or sub-circular up to the pipeline section center cross-sectional, rhombus pipeline section and oval pipeline section be periodic arrangement successively.The above-mentioned heat exchanger tube that prior art provides though structure is brought in constant renewal in, has certain practicality, but substantially all exist heat transfer coefficient low, shape difficulty, shortcomings such as the easy fouling of inside pipe wall, the use field is subject to certain restrictions. in the nonstandard motion of reality, is easy to go wrong.

The utility model content

The purpose of this utility model is to overcome the prior art above shortcomings, by improvement to existing heat exchange tube structure, a kind of heat transfer coefficient height is provided, makes that processing is simple, the heat exchanger tube inwall is less scaling, the corrugated spiral heat-exchange tube of applied range, this heat exchanger tube passes through continuous rolling and forming, the inside and outside surface of its heat exchanger tube forms the helical corrugation wall, tube outer surface has suitable helical corrugation wall, and promptly tube outer surface has suitable wingization ratio and tube outer surface and has suitable lead angle and pitch.The inside and outside heat exchange area of pipe is improved greatly, manage the stronger spiral lamination turn of tidal stream of inside and outside fluid generation and move, near the flow velocity of tube wall is increased more than 30%, the augmentation of heat transfer effect is very remarkable.Destroy the boundary layer by utilizing, the coefficient of heat transfer is improved greatly.Tube wall does not almost have attenuate in the roll forming process in addition, and processing technology is simple, working (machining) efficiency increases substantially, and makes heat exchanger tube reach the purpose of two-sided strengthened heat transfer, and has heat transfer efficiency height, resistance is low, processing cost is low, the scope of application is wide and comprehensive benefit is good characteristics.

The technical scheme that the utility model provides is: this corrugated spiral heat-exchange tube, include the smooth circular cross-section section of helical corrugation section and two ends of roll forming, and be characterized in being equipped with continuous helical corrugation wall on the inside and outside surface of described helical corrugation section.

Compared with prior art, the beneficial effects of the utility model are: because shortened rolling time, reduced production cost, reach in the pipe, the purpose of outer two-sided strengthened heat transfer has higher heat transfer efficiency and manages internal pressure and fall and reduce, when medium circulates in pipe, make steadily regular originally steady flow turn to turbulent flow, improved heat exchange efficiency significantly, be specially adapted to steam water heat exchanger.

Description of drawings

Accompanying drawing is the structural representation of the embodiment that provides of the utility model.

The specific embodiment

As shown in the figure, this corrugated spiral heat-exchange tube is made up of the smooth circular cross-section section 1 of helical corrugation section 2 and two ends of roll forming, is equipped with continuous helical corrugation wall on the inside and outside surface of described helical corrugation section 2.The utility model is when increasing the inside and outside heat transfer sheet area of pipe, make tube fluid produce stronger line and change disturbance, the outer expansion of pipe heat exchange area is suitable with spiral heat exchange tube, nearly wall place heat transferring medium flow velocity increases in the pipe, the augmentation of heat transfer effect is very remarkable in the pipe, belong to the inside and outside heat exchange tube with two reinforced surfaces of strengthening simultaneously of pipe, have that augmentation of heat transfer is effective, flow resistance is less, less scaling, rolling efficiency is high, cost is low characteristics.

Claims (1)

1. corrugated spiral heat-exchange tube includes the smooth circular cross-section section of helical corrugation section and two ends of roll forming, it is characterized in that being equipped with continuous helical corrugation wall on the inside and outside surface of described helical corrugation section.

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