CN216717119U

CN216717119U - Three-dimensional fin heat exchange tube

Info

Publication number: CN216717119U
Application number: CN202220363943.0U
Authority: CN
Inventors: 王键
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-06-10
Anticipated expiration: 2032-02-22

Abstract

The utility model provides a three-dimensional fin heat exchange tube, which comprises a tube body, wherein a plurality of raised fins are respectively arranged on the inner wall and the outer wall of the tube body, and the fins and the tube body are integrally formed, and the three-dimensional fin heat exchange tube is characterized in that: the multiple rows of fins arranged on the inner wall of the pipe body are spirally arranged along the pipe body, and gaps between the adjacent rows of fins are also spiral. The heat exchange tube has the advantages of small contact thermal resistance, high heat exchange efficiency, good heat exchange effect and the like of a typical three-dimensional inner and outer rib heat exchange tube, small fluid resistance in the tube, good stability of the three-dimensional fins in the heat exchange tube in the use process, and small abrasion to the inlet section and the fins in the heat exchange tube.

Description

Three-dimensional fin heat exchange tube

Technical Field

The utility model relates to a heat exchange tube, in particular to a three-dimensional fin heat exchange tube.

Background

The heat exchange technology based on three-dimensional fin heat exchange tube is the intensive heat exchange technology of new generation, and its core lies in strengthening the heat transfer, includes: ribs are processed on the inner side and the outer side of the heat exchange tube, so that the effective heat exchange area in unit volume is increased, and the heat exchange efficiency of heat exchange equipment is improved; each fin is an independent disturbance element and can generate strong disturbance, so that the flowing state reaches full turbulence, the thickness of a boundary layer is greatly reduced, and the heat exchange strength is improved; the discontinuous fins are arranged along the circumference, so that the effective flow area of the fluid is reduced, the flow speed is increased, the thickness of the boundary layer can be reduced, and the thermal resistance is reduced; the alternate expansion and contraction causes the fluid to generate pulsation and vibration, thereby increasing the turbulence of the fluid and strengthening the convection heat transfer; repeated scouring is formed by the pulsating flow of the discontinuous rib fluid, a laminar flow layer is damaged, the thermal resistance is reduced, and the temperature gradient near the wall surface is increased; the roughness difference between the processed surface and the initial surface is large, and the heat exchange effect is improved; the structure is more compact, more heating surfaces can be arranged in the same space, and the heat exchange tube in the form is 2.5-6 times of the heat exchange effect of a common light tube.

The prior document CN204535509U discloses a three-dimensional fin heat exchange tube, which includes a tube body, wherein the inner wall and the outer wall of the tube body are respectively provided with multiple rows of three-dimensional inner fins and multiple rows of three-dimensional outer fins along the axial direction of the tube body, each row of three-dimensional inner fins and each row of three-dimensional outer fins are respectively composed of multiple three-dimensional inner fins and multiple three-dimensional outer fins uniformly distributed in the circumferential direction, and the multiple rows of three-dimensional outer fins are arranged in a staggered manner in height. However, the three-dimensional finned heat exchange tube is of a typical three-dimensional inner and outer rib structure, and the fluid resistance in the tube during use needs to be further optimized. In addition, the heat exchange efficiency is related to the heat exchange area, and generally, the larger the heat exchange area is, the higher the heat exchange efficiency is, but for wider and longer three-dimensional fins in the heat exchange tube, when the flow velocity of fluid in the tube is larger, the worse the stability of the three-dimensional fins is.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a three-dimensional finned heat exchange tube with low resistance to fluid in the tube.

In order to achieve the purpose, the utility model adopts the following technical scheme.

The utility model provides a three-dimensional fin heat exchange tube, includes the pipe body, is provided with the fin of a plurality of perks respectively at the inner wall and the outer wall of pipe body, fin and pipe body integrated into one piece, its characterized in that: the multiple rows of fins arranged on the inner wall of the pipe body are spirally arranged along the pipe body, and gaps between adjacent rows of fins are also spiral.

In order to further reduce the fluid resistance outside the pipe, a plurality of rows of fins arranged on the outer wall of the pipe body are spirally arranged along the pipe body, and gaps between adjacent rows of fins are also spiral.

In order to further improve the heat exchange efficiency and prolong the service life of the three-dimensional finned heat exchange tube, the second gap and the first gap are arranged inside and outside the tube body in a staggered mode. By adopting the structure, the heat exchange of each area can be more uniform, and meanwhile, the weak area of the strength on the tube body of the heat exchange tube can be avoided.

Preferably, the width of the second gap and the width of the first gap are both 1-1.5 times of the width of the fin.

In order to improve the stability of the three-dimensional fins of the heat exchange tube in the using process, adjacent fins arranged on the inner wall of the tube body are close to or contact with each other along the axial direction of the tube body, wherein the tips of the first fins are close to or contact with the abdomen of the second fins.

In order to further improve the stability of the three-dimensional fins in the heat exchange tube in the using process, when the adjacent fins arranged on the inner wall of the tube body are close to each other, the distance between the tip of the first fin and the belly of the second fin is 3-5 mm.

Has the advantages that: the heat exchange tube has the advantages of small contact thermal resistance, high heat exchange efficiency, good heat exchange effect and the like of a typical three-dimensional inner and outer rib heat exchange tube, small fluid resistance in the tube, good stability of the three-dimensional fins in the heat exchange tube in the use process, and small abrasion to the inlet section and the fins in the heat exchange tube.

Drawings

FIG. 1 is a schematic view of a three-dimensional finned heat exchange tube of example 1;

FIG. 2 is a partial schematic view of a three-dimensional finned heat exchange tube according to example 1;

FIG. 3 is a schematic view of a three-dimensional finned heat exchange tube of example 2;

FIG. 4 is a partial schematic view of a three-dimensional finned heat exchange tube according to example 2;

FIG. 5 is a schematic view of a fin structure of a three-dimensional finned heat exchange tube in example 2;

fig. 6 is a schematic structural view of a rib of a three-dimensional ribbed heat exchange tube in embodiment 3.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1

As shown in fig. 1 and 2, a three-dimensional fin heat exchange tube comprises a tube body 1, wherein a plurality of raised fins 2 are respectively arranged on the inner wall and the outer wall of the tube body 1, the fins 2 are integrally formed with the tube body 1, a plurality of rows of fins 2 arranged on the inner wall of the tube body 1 are spirally arranged along the tube body 1, and a gap 3 between adjacent rows of fins 2 is also spiral; the multiple rows of fins 2 arranged on the outer wall of the tube body 1 are spirally arranged along the tube body 1, and the gaps two 4 between the adjacent rows of fins 2 are also spiral. The second gap 4 and the first gap 3 are arranged inside and outside the tube body 1 in a staggered mode, namely the fins 2 on the outer wall of the tube body 1 are opposite to the first gap 3 on the inner wall of the tube body 1, and the fins 2 on the inner wall of the tube body 1 are opposite to the second gap 4 on the outer wall of the tube body 1, so that heat exchange of each area is more uniform, and meanwhile, the weak area of strength can be avoided from appearing on the tube body of the heat exchange tube. In this embodiment, the widths of the second gap 4 and the first gap 3 are 1 time of the width of the fin 2, that is, the widths of the second gap 4 and the first gap 3 are equal to the width of the fin 2.

Example 2

As shown in fig. 3 and 4, the three-dimensional fin heat exchange tube comprises a tube body 1, wherein a plurality of raised fins 2 are respectively arranged on the inner wall and the outer wall of the tube body 1, the fins 2 are integrally formed with the tube body 1, a plurality of rows of fins 2 arranged on the inner wall of the tube body 1 are spirally arranged along the tube body 1, and a gap 3 between adjacent rows of fins 2 is also spiral; multiple rows of fins 2 arranged on the outer wall of the tube body 1 are spirally arranged along the tube body 1, and the gaps two 4 between the adjacent rows of fins 2 are also spiral. The second gap 4 and the first gap 3 are arranged inside and outside the tube body 1 in a staggered mode, namely the fins 2 on the outer wall of the tube body 1 are opposite to the first gap 3 on the inner wall of the tube body 1, and the fins 2 on the inner wall of the tube body 1 are opposite to the second gap 4 on the outer wall of the tube body 1, so that heat exchange of each area is more uniform, and meanwhile, the weak area of strength can be avoided from appearing on the tube body of the heat exchange tube. In this embodiment, the widths of the second gap 4 and the first gap 3 are both 1.5 times of the width of the rib 2. In this embodiment, as shown in fig. 5 again, the adjacent fins 2 arranged on the inner wall of the tube body 1 are close to each other along the axial direction of the tube body 1, that is, the tips of the first fins 21 are close to the web portions 23 of the second fins 22, and the distance between the tips of the first fins 21 and the web portions 23 of the second fins 22 is 3-5 mm. When the manufacturing method is used, firstly, the fins 2 which are tilted as shown by the outer wall of the inner wall of the pipe body 1 are processed, then, a cylindrical bar with a proper diameter is inserted into the pipe body 1, and the fins 2 are pressed into a structure that the adjacent fins 2 are close to each other through the cylindrical bar. In the three-dimensional fin heat exchange tube in the embodiment, even under the condition that the flow velocity of fluid in the tube is very high, one tip of the adjacent fin is in contact with two abdomens of the fins, and the two fins play a mutual supporting role to ensure that the stability of the heat exchange tube is better, and the situation that the fins slightly swing does not exist.

Example 3

A three-dimensional finned heat exchange tube, referring to embodiment 2 and shown in fig. 6, the main difference from embodiment 2 is: along the axial direction of the tube body 1, the adjacent fins 2 arranged on the inner wall of the tube body 1 are contacted with each other, namely, the tip of the first fin 21 is contacted with the web of the second fin 22. When the manufacturing method is used, firstly, the fins 2 which are raised as shown by the outer wall of the tube body 1 are processed on the inner wall of the tube body 1, then a cylindrical bar with a proper diameter is inserted into and penetrates through the tube body 1, and the fins 2 are pressed into a structure in which the adjacent fins 2 are contacted through the cylindrical bar.

The three-dimensional finned heat exchange tube provided by the utility model has the advantages of small contact thermal resistance, high heat exchange efficiency, good heat exchange effect and the like of a typical three-dimensional inner and outer finned heat exchange tube, has the advantage of small fluid resistance in the tube, has the advantage of good stability of the three-dimensional fins in the heat exchange tube in the use process, and has small abrasion on the inlet section and the fins in the heat exchange tube, particularly the tip part of the fins.

Claims

1. The utility model provides a three-dimensional fin heat exchange tube, includes pipe body (1), is provided with fin (2) of a plurality of perks respectively at the inner wall and the outer wall of pipe body (1), fin (2) and pipe body (1) integrated into one piece, its characterized in that: multiple rows of fins (2) arranged on the inner wall of the pipe body (1) are spirally arranged along the pipe body (1), and gaps I (3) between adjacent rows of fins (2) are also spiral.

2. The three-dimensional finned heat exchange tube of claim 1, wherein: multiple rows of fins (2) arranged on the outer wall of the pipe body (1) are spirally arranged along the pipe body (1), and gaps II (4) between adjacent rows of fins (2) are also spiral.

3. The three-dimensional finned heat exchange tube of claim 2, wherein: the second gap (4) and the first gap (3) are arranged inside and outside the pipe body (1) in a staggered mode.

4. The three-dimensional finned heat exchange tube of claim 3, wherein: the width of the second gap (4) and the width of the first gap (3) are 1-1.5 times of the width of the fins (2).

5. The three-dimensional finned heat exchange tube of any one of claims 1 to 4, wherein: adjacent ribs (2) arranged on the inner wall of the tube body (1) are close to or in contact with each other along the axial direction of the tube body (1), wherein the tips of the first ribs (21) are close to or in contact with the web portions (23) of the second ribs (22).

6. The three-dimensional finned heat exchange tube of claim 5 wherein: when the adjacent fins (2) arranged on the inner wall of the tube body (1) are close to each other, the distance between the tip of the first fin (21) and the belly (23) of the second fin (22) is 3-5 mm.