CN2181667Y - Spiral double circle-arc flat tube heat-exchanger - Google Patents

Abstract

The utility model discloses a novel heat exchanger, comprising fixed tube sheets and heat exchange pipes. The heat exchange pipes form a helical double circuit arc flat pipe shape. The utility model has advantages that the flow condition of the medium in heat exchange pipes is changed continuously, which can obtain larger coefficient of convective heat transfer, the heat exchange pipes has elasticity in the axial direction, the utility model can be made into fixed tube sheet type, the structure is simplified, and the cost is low.

Description

Spiral double circle-arc flat tube heat-exchanger

The utility model relates to a kind of heat exchanger, and particularly a kind of heat exchanger tube that relates to is the two circular arc flat pipe type tubular heat exchangers of spiral.

Though advantages such as tubular heat exchanger in the past has the bearing capacity height, and is widely applicable because heat transfer coefficient is difficult to improve, have limited the application in some fields again.In recent years the corrugated tube heat exchanger of releasing on the market also since quality be difficult to guarantee, leak in easily producing, and shortcoming such as cost an arm and a leg, therefore use and also be subjected to some restriction.

The purpose of this utility model provides the heat exchanger that a kind of heat exchanger tube is the two circular arc flat pipe types of spiral, and heat transfer coefficient is higher, and is simple in structure, and cost is lower.

The purpose of this utility model realizes like this: it comprises fixed tube sheet, the heat exchanger tube of heat exchanger, and its major technique feature is: heat exchanger tube is the two circular arc flat tube shapes of spiral.

The utility model has the advantages that: the medium that flows in (1) heat exchanger tube both also was the changing flow regime of direction near side (ns) wall stream.Therefore in identical pipe, under the velocity of medium, can obtain convection transfer rate in the bigger pipe; Because the effect of spiral is to making flowing of transversal flow change direction more, make the wake boundary of heat-transfer pipe outer surface obtain more destroying, therefore the tube outside has also obtained bigger convective heat-transfer coefficient, and because spiral heat exchange tube has certain elasticity in the axial direction, therefore can make fixed tube sheet type, simplified structure.

Below in conjunction with accompanying drawing embodiment of the present utility model is described further:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the cross section of heat exchanger tube.

See Fig. 1,2, concrete structure is: welding heat exchanger tube 3 between two ends fixed tube sheet 2, two tube sheets of heat exchanger 1, heat exchanger tube 3 adopt seamless steel pipes through rolling and draw to turn round and form, and heat exchanger tube 3 be spiral pair circular arc flat tube shapes.

The utility model is applicable to systems such as heating power, petrochemical industry and light industrys.

Claims (1)

1, the two circular arc flat tube heat exchangers of a kind of spiral comprise fixed tube sheet, the heat exchanger tube of heat exchanger, and it is characterized in that: heat exchanger tube is the two circular arc flat tube shapes of spiral.