CN113432476A

CN113432476A - Inner finned tube for heat exchanger

Info

Publication number: CN113432476A
Application number: CN202110632579.3A
Authority: CN
Inventors: 谢霄虎; 刘京召
Original assignee: Shaanxi Qinke Expo Aviation Technology Co ltd; Beijing Kerongda Aviation Technology Co ltd
Current assignee: Shaanxi Qinke Expo Aviation Technology Co ltd; Beijing Kerongda Aviation Technology Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-09-24

Abstract

The utility model belongs to the technical field of the heat exchanger and specifically relates to an inner finned tube for heat exchanger is related to, and it includes that inner tube and cover establish outer tube on the inner tube, the inner tube with form the flow space that supplies the fluid to flow through between the outer tube, place in the flow space and be used for the fluid to carry out the fin that disturbs in order to change fluid mobility. The advantage of this application is can also improve heat exchange efficiency when not increasing whole volume, satisfies the heat transfer demand.

Description

Inner finned tube for heat exchanger

Technical Field

The application relates to the field of heat exchangers, in particular to an inner finned tube for a heat exchanger.

Background

The tube-fin heat exchanger is mainly used for gas-liquid heat exchange, meets the technical requirements of equipment heat exchange, and is the most widely used heat exchange equipment in gas and liquid heat exchangers.

The heat exchange tube is one of the main elements of the heat exchanger, is arranged in the cylinder and is used for exchanging heat between two media, at present, the traditional mode is to adopt a copper light tube with good heat conductivity as the heat exchange tube, fluid in the tube directly exchanges heat through the tube wall, the heat exchange efficiency is low, and in order to meet the requirement of high heat exchange, the volume of the heat exchanger can only be continuously increased so as to improve the heat exchange efficiency. With the development of industrial technology, the requirements of small volume and high efficiency are provided for the volume and the heat exchange efficiency of the heat exchanger, and the existing tube-fin heat radiator is more and more difficult to meet the requirements.

Disclosure of Invention

In order to meet the requirements of small volume and high efficiency heat exchange, the application provides an inner finned tube for a heat exchanger.

The application provides a finned tube in heat exchanger adopts following technical scheme:

the inner finned tube for the heat exchanger comprises an inner tube and an outer tube sleeved on the inner tube, wherein a flowing space for fluid to flow through is formed between the inner tube and the outer tube, and fins for disturbing the fluid to change the fluidity of the fluid are placed in the flowing space.

Through adopting above-mentioned technical scheme, the setting of inner tube for fluid that flows in flowing space can dispel the heat through inner tube and outer tube simultaneously, increases the secondary heat transfer surface, and increase heat transfer area improves heat exchange efficiency, and the setting of fin can change fluidic mobility, further improves fluidic heat transfer efficiency, can also improve heat exchange efficiency when not increasing the whole volume of heat exchanger, has satisfied the needs of little volume, high efficiency heat transfer.

Optionally, the fin includes a plurality of end-to-end baffles, a flow channel is formed between each baffle, a flow channel is formed between two adjacent baffles, and a converging groove communicated with the plurality of flow channels is formed on the fin.

By adopting the technical scheme, the fluid flowing in the fluid channels can converge in the convergence groove and then is divided into the plurality of fluid channels, so that convergence and diversion are alternately carried out, an interface layer of the fluid flowing in the tube is damaged, disturbance is increased, and the heat exchange efficiency is improved.

Optionally, the converging groove is a spiral groove formed from one end of the fin to the other end of the fin.

By adopting the technical scheme, the fluid flowing into the convergence groove can continuously flow to each flow channel and simultaneously flow along the spiral direction of the convergence groove, so that the fluidity of the fluid is increased, and the heat exchange efficiency is improved.

Optionally, the spiral angle of the converging groove is 10 to 80 °.

Optionally, the width of the converging groove in the axial direction of the inner pipe and the outer pipe is greater than or equal to 1 mm.

Through adopting above-mentioned technical scheme for in the fluid that arrives in the convergence groove can the intensive mixing reposition of redundant personnel to flow channel, realize abundant disturbance, avoid the fluid not yet mix again flow to flow channel in.

Optionally, each partition plate is V-shaped in cross section.

By adopting the technical scheme, the cross section of each flow channel is of a triangular supporting structure, and the stability and the strength of the inner finned tube are enhanced.

Optionally, the V-shaped bottoms of the partition plates are in arc transition, and two adjacent partition plates are in arc transition connection.

Through adopting above-mentioned technical scheme, when guaranteeing that baffle and inner tube and baffle and outer pipe line contact are sealed, can also reduce the baffle and produce wearing and tearing to the inner tube or the baffle is to the outer pipe.

Optionally, one end or both ends of the inner tube are closed.

Through adopting above-mentioned technical scheme, guarantee that fluid flows through between inner tube and the outer tube.

Optionally, the inner diameter of the outer tube is greater than or equal to 1.5 times the outer diameter of the inner tube.

By adopting the technical scheme, enough fluid flows between the inner pipe and the outer pipe.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the arrangement of the inner pipe enables the fluid between the inner pipe and the outer pipe to be radiated from the inside of the inner pipe and the outside of the outer pipe at the same time, so that the secondary heat transfer surface of the fluid is increased, and the heat exchange area is increased; the arrangement of the fins can increase the disturbance shape of the fluid, further improve the heat dissipation efficiency, improve the heat exchange efficiency while not increasing the overall volume of the heat exchanger, and meet the requirements of small volume and high heat exchange efficiency;

2. the arrangement of the convergence groove enables the fluid in the plurality of flow channels to be converged into the convergence groove, and then the fluid is divided into the plurality of flow channels, so that alternate confluence and division are realized, an interface layer of the fluid flowing in the pipe is damaged, the disturbance of the fluid is increased, and the heat exchange efficiency is improved;

3. the V-shaped section of the partition plate enables the section of each flow channel to be a triangular support structure, and the support stability and the structural strength of the inner finned tube are greatly enhanced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present application.

Fig. 2 is a left side view schematic of the present application.

Fig. 3 is a schematic view for embodying the structure of the convergence slot.

Description of reference numerals: 1. an inner tube; 2. a fin; 21. a flow channel; 22. a partition plate; 23. a sink tank; 3. an outer tube.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses an inner finned tube for a heat exchanger. Referring to fig. 1, the inner finned tube comprises an inner tube 1 and an outer tube 3 sleeved on the inner tube 1, wherein fluid flows through the inner tube 1 and the outer tube 3, so that the fluid can be cooled through the inner tube 1 and the outer tube 3 at the same time, the heat exchange area is increased, and the heat exchange efficiency is improved.

Referring to fig. 2, the fins 2 are disposed between the inner tube 1 and the outer tube 3, and the fins 2 can disturb the fluid between the inner tube 1 and the outer tube 3, thereby changing the fluid property of the fluid and improving the heat exchange efficiency. Specifically, the fin 2 includes a plurality of end-to-end partition plates 22, one flow passage 21 is formed between each partition plate 22, another flow passage 21 is formed between two adjacent partition plates 22, and the length direction of each flow passage 21 coincides with the axial direction of the inner tube 1 and the outer tube 3. So that the fluid flowing between the inner tube 1 and the outer tube 3 will be branched to flow in the plurality of flow channels 21.

The section of the partition plate 22 can be V-shaped, the section of the partition plate 22 can also be semicircular or trapezoidal and other shapes, and the section of the partition plate 22 is illustrated as the V-shaped in the application, so that the section of each flow channel 21 formed by the partition plate 22 is a triangular support structure, and the overall support stability and structural strength of the inner finned tube can be greatly improved.

During the installation, place fin 2 between inner tube 1 and outer tube 3 after, need expand the pipe to inner tube 1 or carry out the draw processing to outer tube 3 for the V-arrangement open end of every baffle 22 and the one end that deviates from its open end can inseparable butt on outer tube 3 inner wall and inner tube 1 outer wall, make fin 2 and outer tube 3 and fin 2 be line contact with outer tube 3, still can not reduce the capacity of flow channel 21 when guaranteeing that every flow channel 21 is independent.

And, in order to avoid the baffle 22 butt when outer tube 3 and baffle 22 butt are on inner tube 1, baffle 22 causes wearing and tearing to outer tube 3 and baffle 22 to inner tube 1, thereby reduce the life of inner fin 2 pipe, the bottom of every baffle 22 and the junction of two adjacent baffles 22 are the smooth transitional coupling of circular arc, make fin 2 pass through the contact of arc surface with inner tube 1 and outer tube 3, can also reduce the wearing and tearing that fin 2 caused to inner tube 1 and outer tube 3 when guaranteeing line contact between fin 2 and inner tube 1 and fin 2 and outer tube 3.

Referring to fig. 3, the fin 2 is provided with the convergence groove 23 simultaneously communicated with the plurality of flow channels 21, so that the fluid flowing in the flow channels 21 can be converged in the convergence groove 23, then continuously flows, and is shunted to the plurality of flow channels 21 from the convergence groove 23, thereby realizing shunting, confluence and shunting of the fluid alternately, destroying the interface layer of the fluid between the inner tube 1 and the outer tube 3, increasing disturbance, and improving heat dissipation efficiency.

The converging groove 23 may be a spiral groove formed from one end of the fin 2 to the other end of the fin 2, and of course, the converging groove 23 may also be a groove formed at intervals in the length direction of the inner tube 1 and the outer tube 3, and the groove may be annular or arc-shaped, as long as the multiple flow channels 21 can be communicated at the same time, so that the fluid in the multiple flow channels 21 can be converged when passing through the converging groove 23, and then is split from the converging groove 23. In the present application, the converging groove 23 is taken as an example to describe, so that after the fluid in the plurality of flow channels 21 converges in the converging groove 23, the fluid can flow along the spiral direction of the converging groove 23 when being shunted to the flow channels 21 again, thereby improving the fluidity of the fluid and greatly improving the heat exchange efficiency.

When the converging grooves 23 are helical grooves, the helix angle of the converging grooves 23 is between 0 and 90 degrees, preferably, the helix angle of the helical grooves in this application is selected to be between 10 and 80 degrees.

Meanwhile, in order to prevent the fluid in the flow channel 21 from flowing into the flow channel 21 again without being sufficiently mixed after flowing into the convergence groove 23, and thus reducing the heat exchange efficiency, the width of the convergence groove 23 in the axial direction of the inner tube 1 and the outer tube 3 is greater than or equal to 1 mm.

Wherein, the one end of inner tube 1 seals the setting, guarantees that fluid can be smooth to flow through between inner tube 1 and outer tube 3, and of course, inner tube 1 also can both ends seal the setting, and specific can confirm according to actual conditions.

And, the internal diameter of outer tube 3 is more than or equal to 1.5 times the external diameter of inner tube 1 for the space that supplies fluid flow that has between inner tube 1 and outer tube 3 guarantees heat exchange efficiency.

The implementation principle of the inner finned tube for the heat exchanger is as follows: during the use, the fluid directly flows to between inner tube 1 and the outer tube 3, can dispel the heat from outer tube 3 and inner tube 1 simultaneously, increase the secondary heat transfer surface, the fluid also flows in flow channel 21 simultaneously, along with the flow of fluid in flow channel 21, the fluid will flow to assemble in the groove 23 from flow channel 21 gradually, realize converging, continue to shunt to with assembling in each flow channel 21 that groove 23 communicates from assembling in the groove 23 again, realize fluidic reposition of redundant personnel, through lasting converge, the reposition of redundant personnel, further improve fluidic radiating efficiency, make and just can improve heat exchange efficiency greatly under the condition that does not increase the whole volume of heat exchanger, satisfy the requirement of small volume, high efficiency heat transfer.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An inner finned tube for a heat exchanger is characterized in that: establish including inner tube (1) and cover outer tube (3) on inner tube (1), inner tube (1) with form the flow space that supplies fluid to flow through between outer tube (3), place in the flow space and be used for the fluid to carry out fin (2) of disturbing in order to change fluid mobility.

2. An inner finned tube for a heat exchanger according to claim 1 wherein: the fin (2) comprises a plurality of end-to-end partition plates (22), a flow channel (21) is formed between each partition plate (22), a flow channel (21) is formed between every two adjacent partition plates (22), and the fin (2) is provided with a gathering groove (23) which is communicated with the flow channels (21) simultaneously.

3. An inner finned tube for a heat exchanger according to claim 2 wherein: the converging groove (23) is a spiral groove formed from one end of the fin (2) to the other end of the fin (2).

4. An inner finned tube for a heat exchanger according to claim 3 wherein: the spiral angle of the converging groove (23) is 10-80 degrees.

5. An inner finned tube for a heat exchanger according to claim 2 wherein: the width of the convergence groove (23) in the axial direction of the inner pipe (1) and the outer pipe (3) is more than or equal to 1 mm.

6. An inner finned tube for a heat exchanger according to claim 2 wherein: each partition plate (22) is V-shaped in cross section.

7. An inner finned tube for a heat exchanger according to claim 6 wherein: the V-shaped bottoms of the partition plates (22) are in arc transition, and the two adjacent partition plates (22) are in arc transition connection.

8. An inner finned tube for a heat exchanger according to claim 1 wherein: one end or two ends of the inner pipe (1) are sealed.

9. An inner finned tube for a heat exchanger according to claim 1 wherein: the inner diameter of the outer pipe (3) is more than or equal to 1.5 times of the outer diameter of the inner pipe (1).