CN2280272Y

CN2280272Y - Three-D finned heat-transfer tube

Info

Publication number: CN2280272Y
Application number: CN 96233446
Authority: CN
Inventors: 许光华
Original assignee: Chuanbei Machinery Factory China Water Conservacy And Hydroelectric No5 Engine
Current assignee: Chuanbei Machinery Factory China Water Conservacy And Hydroelectric No5 Engine
Priority date: 1996-07-17
Filing date: 1996-07-17
Publication date: 1998-04-29
Anticipated expiration: 2006-07-17

Abstract

The utility model relates to a three-dimensional finned heat-transfer tube. The utility model is characterized in that heat transfer plates 1 are three-dimensional fins and the cross-section of the heat transfer plates 1 are in the shape of a triangle; the heat transfer plates 1 are directly derived from a central tube 2 and are distributed on the central tube in a helical shape. The utility model has the advantages of simple fabrication, good fin strength, large heat transfer area, high heat transfer rate and convenient dust abatement, and can be widely used on various cold-heat exchangers.

Description

The three-dimension fin heat-transfer pipe

The utility model relates to a kind of heat-transfer pipe, especially a kind of three-dimension fin heat-transfer pipe.

In patent documentation, though many reports about the heat-transfer pipe technology are arranged, in these reports, heat-transfer pipe still exists such or such problem.As Chinese patent 93238237.1 disclosed " a kind of metal heat transfer pipe with internal-external heat exchange face ", though can increase the internal-external heat exchange face, in thermal medium convection heat transfer' heat-transfer by convection process, rate of heat transfer is slower.And for example: Chinese patent 95242747.8 disclosed " leaf roll formula heat-transfer pipe ", though can improve heat transfer property, improve rate of heat transfer, exist leaf roll formula fin strength not high, the defective of dedusting difficulty.

The purpose of this utility model provides a kind of three-dimension fin heat-transfer pipe, and it is good heat-transfer not only, can increase heat exchange area, and the fin strength height, and dedusting is easy to maintenance.

The purpose of this utility model is achieved in that and is comprising heat transfer sheet, in the heat-transfer pipe of central tube, from central tube, directly cut heat transfer sheet, its structural feature is: heat transfer sheet is a three-dimension fin, its cross section is triangular in shape, it is directed to central tube, presses spiral distribution on central tube.

The utility model adopts the cutting of heat-transfer pipe special machine bed to make, because heat transfer sheet is directed to central tube, therefore, and its coefficient of heat conduction unanimity, heat energy loss is low.According to hydrodynamics and thermal medium convection heat transfer' heat-transfer by convection rule, heat transfer sheet is made three-dimensional shape, meet fluid media (medium) heat transfer and heat absorption rule, help fluid in flow process, can contact with heat-transfer area more widely, reduced detention layer thickness in different directions, improve rate of heat transfer, thereby improve heat transfer property, improved the coefficient of conductivity, strengthen heat-transfer effect.

Adopt such scheme, processing is simple, and production cost is low, and fin strength is good, and heat transfer area is big, the rate of heat transfer height, and dedusting is convenient.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a front view of the present utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the cross section view of heat transfer sheet 1 among Fig. 1.

From Fig. 1, Fig. 2, Fig. 3 as can be known: the utility model is made up of heat transfer sheet 1 and central tube 2, wherein heat transfer sheet 1 is a three-dimension fin, and its cross section is triangular in shape, and it is directed to central tube 2, directly cut on center tube wall, it presses spiral distribution on central tube 2.

As shown in Figure 3, heat transfer sheet 1 by windward side a, crosswind face b, cut luvisde c and the garden arc R that forms during because of machining constitutes, the cross section that it is characterized in that heat transfer sheet 1 is a triangle, so be three-dimension fin.The thickness of fin is 0.2～2 millimeter, and width is 0.5～4 millimeter, and heat transfer sheet 1 every circle on central tube 2 is distributed with 20～50 teeth.

Claims

1. a three-dimension fin heat-transfer pipe comprises central tube (2) and heat transfer sheet (1), it is characterized in that heat transfer sheet (1) is a three-dimension fin, and its cross section is triangular in shape, and it is directed to central tube, presses spiral distribution on central tube.