CN212747457U - Spiral longitudinal groove heat exchange tube - Google Patents

Spiral longitudinal groove heat exchange tube Download PDF

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Publication number
CN212747457U
CN212747457U CN202021448425.6U CN202021448425U CN212747457U CN 212747457 U CN212747457 U CN 212747457U CN 202021448425 U CN202021448425 U CN 202021448425U CN 212747457 U CN212747457 U CN 212747457U
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CN
China
Prior art keywords
heat exchange
spiral
longitudinal groove
exchange tube
spiral longitudinal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN202021448425.6U
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Chinese (zh)
Inventor
吴金星
李哲
陈雅博
赵进元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengzhou University
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Zhengzhou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhengzhou University filed Critical Zhengzhou University
Priority to CN202021448425.6U priority Critical patent/CN212747457U/en
Application granted granted Critical
Publication of CN212747457U publication Critical patent/CN212747457U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a spiral longitudinal groove heat exchange tube, its characterized in that: the spiral longitudinal groove is provided with an inwards concave spiral longitudinal groove which extends spirally on the tube wall of the spiral longitudinal groove heat exchange tube, the spiral longitudinal groove presents a concave semicircular cambered surface on the outer side of the tube wall of the heat exchange tube, and a convex semicircular cambered surface on the inner side of the tube wall of the heat exchange tube; the groove depth of the spiral longitudinal groove is 0.5-2 mm, the groove width is 1-4 mm, and the angle between the center line of the groove and the center line of the heat exchange tube is 5-20 degrees; 1 to 6 spiral longitudinal grooves are uniformly distributed on the circumference of the tube wall of the heat exchange tube; the spiral longitudinal groove heat exchange tube is spiral, the inner diameter of the spiral is 8-20 mm, and the spiral angle is 10-30 degrees. After the spiral longitudinal groove heat exchange tube is arranged in the wound tube type heat exchanger, the flow state of working media in the tube is changed through the turbulent flow effect of the spiral longitudinal groove, and the turbulence degree of the working media is enhanced. Compared with the prior heat exchange tube, the utility model discloses not only have higher heat transfer efficiency, have very strong automatically cleaning and prevent the scale deposit ability moreover.

Description

Spiral longitudinal groove heat exchange tube
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a spiral longitudinal groove heat exchange tube.
Background
The heat exchange tube is a key part of the heat exchanger, and the heat exchange performance of the heat exchanger is directly influenced by the size of the heat exchange capacity of the heat exchange tube. In order to enhance the heat exchange capability of the heat exchange tube, the technical scheme that the heat exchange area is increased by additionally processing the outer wall of the heat exchange tube of the evaporator by using the single-spiral heat exchange fin appears in the prior art, however, the heat exchange tube of the single-spiral fin still has the following defects: the molding process is complex and the production cost is high. In addition, the heat exchange area increased by the spiral rack arranged on the inner wall is limited, and the heat exchange coefficient is not high, so that the improvement on the heat exchange effect of the heat exchange pipe is limited.
Some novel heat exchange tube structures in addition are like spiral cross striation groove pipe, spiral groove pipe, spiral nodal pipe etc. though can improve heat transfer coefficient to a certain extent, however, these add the manufacturing difficulty of heat exchange tube, and is with high costs, spiral cross striation groove pipe, spiral groove pipe can cause great resistance moreover, and the comprehensive properties is not good, is difficult to be applied to engineering in actual, consequently, need further development processing simply, make easily and can improve the novel spiral tube structure of heat transfer performance, improve heat transfer capacity, make the range of application wider.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a spiral longitudinal groove heat exchange tube.
The utility model adopts the technical proposal that: the pipe wall of the spiral longitudinal groove heat exchange pipe is provided with an inwards concave spiral longitudinal groove which extends spirally, the spiral longitudinal groove presents a concave semicircular cambered surface at the outer side of the pipe wall of the heat exchange pipe, and a convex semicircular cambered surface at the inner side of the pipe wall of the heat exchange pipe; the groove depth of the spiral longitudinal groove is 0.5-2 mm, the groove width is 1-4 mm, and the angle between the center line of the groove and the center line of the heat exchange tube is 5-20 degrees; the spiral longitudinal grooves are uniformly distributed at a single head or multiple heads in the circumferential direction of the tube wall of the heat exchange tube, and the number of the heads is 1-6; the spiral longitudinal groove heat exchange tube is spiral, the inner diameter is 8-20 mm, and the spiral angle is 10-30 degrees.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the spiral longitudinal groove is arranged outside the spiral pipe, so that the flow guide effect is achieved on the working medium in the pipe, the working medium in the pipe is enabled to rotate spirally while advancing along the pipe, the secondary flow strength of the working medium in the pipe in the convection heat exchange process is effectively enhanced, and the heat exchange condition between the working medium in the pipe and the pipe body is greatly improved.
2. The spiral longitudinal grooves are formed outside the spiral pipe, so that the heat exchange area of the inner surface and the outer surface of the pipe body is increased, and the heat exchange capacity of the pipe body and heat exchange media on two sides is improved.
3. The spiral longitudinal grooves are evenly distributed at multiple ends in the circumferential direction of the cross section of the heat exchange tube, so that fluid on the inner wall and the outer wall of the heat exchange tube can exchange heat uniformly along the spiral curved surface, the area of a heat exchange dead zone is favorably reduced, and the heat exchange effect is improved.
4. The pipe body is made of metal, so that the structural strength of the heat exchange pipe can be improved, and the service life of the heat exchange pipe is prolonged.
Drawings
FIG. 1 is a schematic view of a spiral longitudinal groove heat exchange tube structure.
FIG. 2 is a schematic cross-sectional view of a spiral longitudinal grooved heat exchange tube.
Reference numerals: 1-an inlet end; 2-pipe wall of heat exchange pipe; 3-spiral longitudinal grooves; 4-outlet end.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The utility model provides a spiral longitudinal groove heat exchange tube which characterized in that: the spiral longitudinal groove is provided with an inwards concave spiral longitudinal groove which extends spirally on the tube wall of the spiral longitudinal groove heat exchange tube, the spiral longitudinal groove presents a concave semicircular cambered surface on the outer side of the tube wall of the heat exchange tube, and a convex semicircular cambered surface on the inner side of the tube wall of the heat exchange tube; the groove depth of the spiral longitudinal groove is 0.5-2 mm, the groove width is 1-4 mm, and the angle between the center line of the groove and the center line of the heat exchange tube is 5-20 degrees; the spiral longitudinal grooves are uniformly distributed at a single head or multiple heads in the circumferential direction of the tube wall of the heat exchange tube, and the number of the heads is 1-6; the spiral longitudinal groove heat exchange tube is spiral, the inner diameter is 8-20 mm, and the spiral angle is 10-30 degrees.
The processing method of the spiral longitudinal groove heat exchange tube is basically the same as that of the existing spiral groove tube, and the spiral longitudinal groove heat exchange tube can be processed on a common machine tool. Different from the existing spiral groove pipe, the angle between the central line of the upper groove of the spiral longitudinal groove heat exchange pipe and the central line of the heat exchange pipe is small, and the general range is only 5-20 degrees, so that the good heat exchange performance can be achieved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. The utility model provides a spiral longitudinal groove heat exchange tube which characterized in that: the spiral longitudinal groove is provided with an inwards concave spiral longitudinal groove which extends spirally on the tube wall of the spiral longitudinal groove heat exchange tube, the spiral longitudinal groove presents a concave semicircular cambered surface on the outer side of the tube wall of the heat exchange tube, and a convex semicircular cambered surface on the inner side of the tube wall of the heat exchange tube; the groove depth of the spiral longitudinal groove is 0.5-2 mm, the groove width is 1-4 mm, and the angle between the center line of the groove and the center line of the heat exchange tube is 5-20 degrees; the spiral longitudinal grooves are uniformly distributed at a single head or multiple heads in the circumferential direction of the tube wall of the heat exchange tube, and the number of the heads is 1-6; the spiral longitudinal groove heat exchange tube is spiral, the inner diameter is 8-20 mm, and the spiral angle is 10-30 degrees.
CN202021448425.6U 2020-07-20 2020-07-20 Spiral longitudinal groove heat exchange tube Expired - Fee Related CN212747457U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021448425.6U CN212747457U (en) 2020-07-20 2020-07-20 Spiral longitudinal groove heat exchange tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021448425.6U CN212747457U (en) 2020-07-20 2020-07-20 Spiral longitudinal groove heat exchange tube

Publications (1)

Publication Number Publication Date
CN212747457U true CN212747457U (en) 2021-03-19

Family

ID=75037263

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021448425.6U Expired - Fee Related CN212747457U (en) 2020-07-20 2020-07-20 Spiral longitudinal groove heat exchange tube

Country Status (1)

Country Link
CN (1) CN212747457U (en)

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Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20210319

Termination date: 20210720

CF01 Termination of patent right due to non-payment of annual fee