CN2255032Y

CN2255032Y - Thin double corrugation type heat exchange element

Info

Publication number: CN2255032Y
Application number: CN 96206042
Authority: CN
Inventors: 郑建岳
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-11
Filing date: 1996-03-11
Publication date: 1997-05-28
Anticipated expiration: 2006-03-11

Abstract

The utility model relates to a thin double corrugation type heat transfer element, which is composed of a tube body. The thickness delta of the tube wall of the tube body is 2-4% of the internal diameter d of the tube body; the longitudinal section of the tube body has the arrangement of the double corrugation shape with the tangential wave peak and wave bottom, and the proportion of the external diameter D of the tube body and the internal diameter d of the tube body is 1.1 to 1.3. Since the double corrugation type tube body can realize sufficient torrential flow, the wall thickness is reduced, and accordingly, the heat transfer coefficient is high, and the thermal stress is small; the scale can not be generated, and thus, the scale cleaning is not needed. Thus the maintenance cost is largely reduced, the labor strength is alleviated, and the service life is extended. The thin double corrugation type heat transfer element is suitable for the installation and the usage on various heat exchangers in different structures.

Description

Slim dual damascene shape heat exchange element

The utility model relates to the major part in a kind of heat exchanger, slim dual damascene shape heat exchange element.

Be widely used in the tubular heat exchanger in the heat enginnering, for satisfying the security reliability of the requirement of strength and the work of assurance, the 10% inside and outside surface that the wall thickness of its heat exchange element generally all surpasses internal diameter mostly is light face or helical surface, and its thermal stress is big, thermal resistance is high, heat transfer coefficient is little, easy fouling, snaking work are numerous and diverse, lack service life.

The purpose of this utility model is to provide a kind of slim dual damascene shape heat exchange element, and its thermal stress is little, the heat transfer coefficient height, and non-scaling, maintenance cost reduce greatly, long working life.

The utility model is achieved in that slim dual damascene shape heat exchange element is made of body, and the pipe thickness δ of body is 2～4% of internal diameter of tube body d, the longitudinal section of body is to be arranged by crest, the tangent dual damascene shape of trough, and the body outer diameter D is 1.1～1.3 with the ratio of internal diameter of tube body d.

Accompanying drawing: structural representation of the present utility model.

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

Body (3) cross section is that external diameter is D, and internal diameter is the circle of d, and pipe thickness δ is 2%d＜δ＜4%d.

Crest (1), trough (2) all are circular arc, and the longitudinal section of body (3) is that the tangent dual damascene shape of large and small circular arc is arranged.

The ratio of body (3) outer diameter D and body (3) inner diameter d is D/d=1.1～1.3.

This dual damascene shape heat exchange element can be installed and used on the heat exchanger of various different structures.

The utility model is compared with prior art: because dual damascene shape body can be realized abundant turbulent flow, interior, The outer coefficient of heat transfer obviously improves. Because wall thickness reduces, heat transfer coefficient improves. Because the turbulent flow of fully strengthening Constantly wash away tube wall, destroyed scaling condition, non-scaling, do not need snaking, thereby maintenance cost is fallen greatly Low, alleviated labour intensity, prolonged service life. Owing to adopted the body thin-walled knot of dual damascene shape Structure, heat should be little, can prevent bond open, practical again. The general shell and tube heat exchange of heat transfer coefficient Device improves 3～5 times.

Claims

1. slim dual damascene shape heat exchange element, constitute by body, the pipe thickness δ that it is characterized in that body (3) is 2～47 of body (a 3) inner diameter d, the longitudinal section of body (3) is to be arranged by crest (1), the tangent dual damascene shape of trough (2), and the ratio of body (3) outer diameter D and body (3) inner diameter d is 1.1～1.3.

2. heat exchange element according to claim 1, the cross section that it is characterized in that body (3) are that external diameter is that D, internal diameter are the circles of d.