Finned tube structure of heat exchanger

Abstract

The finned tube structure of the heat exchanger comprises a tube body, limiting plates are fixedly arranged at the front end and the rear end outside the tube body, a plurality of telescopic cavities are formed in the upper end and the lower end inside each limiting plate, the telescopic cavities are distributed at equal intervals, the limiting plates are sleeved with a plurality of mounting plates, and the mounting plates are distributed at equal intervals. The mounting plate is in sliding fit with the limiting plate, four sliding grooves are formed in the portion, close to the pipe body, of the mounting plate, the sliding grooves are of a penetrating structure, eight fixing cavities are formed in the portion, away from the pipe body, of the mounting plate, the fixing cavities are of a penetrating structure, and one end of each fixing cavity communicates with the corresponding sliding groove. And the heat transfer of the finned tube is not good enough.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a fin tube structure of a heat exchanger. Background Art

[0002] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. It transfers heat from the higher-temperature fluid to the lower-temperature fluid through heat conduction, convection, and radiation to meet process requirements. The operating principles of a heat exchanger are primarily based on heat conduction and convection. In a partitioning heat exchanger, the two fluids are separated by a wall, and heat is transferred through heat conduction through the wall and convection along the wall surface. In a direct-contact heat exchanger, the two fluids come into direct contact and mix, with heat exchange achieved through mixing and heat transfer. Finned tubes are a key component of heat exchangers.

[0003] For example, the Chinese patent "A finned tube structure of a heat exchanger" with announcement number CN208171083U includes a tube column and a plurality of fins arranged on the tube column, the tube column includes an air inlet end and an air outlet end, the height of the plurality of fins is gradually reduced from the air inlet end toward the air outlet end on the tube column, ash guide holes are provided at the bottom of the plurality of fins, the spacing between the plurality of fins is gradually reduced from the air inlet end toward the air outlet end on the tube column, an arc-shaped protrusion is provided between two adjacent fin tubes on the tube column, and a wear-resistant coating is provided on the plurality of fins.

[0004] Although the above-mentioned existing technology can realize the installation and use of finned tubes, in actual use, on the one hand, the fins on the finned tubes are difficult to disassemble and assemble, and the fins will bend when the finned tubes collide. When replacing the bent fins, the entire fins need to be removed, which makes it difficult to replace the bent fins individually, thereby increasing the maintenance cost of the finned tubes. On the other hand, the heat transfer of the finned tubes is not good enough. When the heat exchanger is working, the inside of the finned tubes is filled with a flowing medium with temperature. At this time, the flowing medium transfers heat to the outside of the finned tubes after contacting the tube wall, resulting in a limited contact area between the medium and the tube wall, thereby reducing the heat transfer effect. Therefore, it does not meet the existing needs. In this regard, we propose a finned tube structure for a heat exchanger. Utility Model Content

[0005] The purpose of the utility model is to provide a finned tube structure for a heat exchanger, so as to solve the problems in the above background art that the fins on the finned tubes are difficult to disassemble and assemble, and the heat transfer of the finned tubes is not good enough.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a finned tube structure of a heat exchanger, comprising a tube body, wherein limit plates are fixedly provided at the front and rear ends of the outside of the tube body, and a plurality of telescopic cavities are provided at the upper and lower ends of the inside of the limit plate, and the telescopic cavities are equidistantly distributed. The outside of the limit plate is sleeved with a plurality of mounting plates, and the mounting plates are equidistantly distributed. The mounting plates slide in cooperation with the limit plates, and four slide grooves are provided on the inside of the mounting plate near the tube body, and the slide grooves are a through-type structure. Eight fixed cavities are provided on the inside of the mounting plate away from the tube body, and the fixed cavities are a through-type structure. One end of the fixed cavity is connected to the slide groove.

[0007] Preferably, a fixing rod is provided inside the telescopic cavity, one end of the fixing rod extends into the interior of the fixed cavity, the fixing rod slides with the telescopic cavity, and the other end of the fixing rod located inside the telescopic cavity is fixedly provided with a support spring, and the other end of the support spring is fixedly connected to the inner wall of the telescopic cavity.

[0008] Preferably, a mounting seat is fixedly provided on the upper end of the mounting plate located at the opening position of the fixing cavity, and a limiting cavity is provided inside the mounting seat.

[0009] Preferably, an ejector rod is provided inside the limiting cavity, one end of the ejector rod extends to the outside of the mounting seat, the ejector rod and the limiting cavity are slidably matched, and fixed seats are fixedly provided on both sides of the ejector rod inside the limiting cavity, and the fixed seats and the limiting cavity are slidably limited.

[0010] Preferably, a return spring is fixedly provided on one end of the fixing seat, and the other end of the return spring is fixedly connected to the inner wall of the limiting cavity.

[0011] Preferably, arc-shaped fixing plates are provided at the upper and lower parts of the tube body, and the arc-shaped fixing plates are welded and fixed to the tube body. A plurality of arc-shaped fins are provided at one end of the arc-shaped fixing plate close to the center of the tube body, and the arc-shaped fins are evenly distributed and welded to the arc-shaped fixing plate.

[0012] Preferably, a circular fin is provided at a middle position outside the mounting plate, and the circular fin is fixed to the mounting plate by welding.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model can quickly fix the circular fin by means of the slide groove and the fixing rod. When fixing the circular fin, first align the opening on the mounting plate with the limit plate and sleeve the mounting plate on the outside of the limit plate. At this time, the mounting plate is slid outside the tube body until the mounting plate slides in front of the fixing rod. At this time, the fixing rod is pressed to retract the fixing rod into the telescopic cavity and the supporting spring is in a compressed state. The mounting plate is continued to be moved to make the fixing rod slide in the slide groove until the fixing rod moves to a certain position. At this time, the fixing rod is in the opening position of the fixing cavity and the supporting spring is reset at the same time. The fixing rod is pushed into the fixing cavity by the reset of the supporting spring, so that the circular fin is fixed to the outside of the tube body, making the fixing of the circular fin more convenient.

[0015] 2. The utility model can increase the contact area between the medium and the inner wall of the tube body through the curved fins and the curved mounting plate. When the tube body is in use, the medium flows inside the tube body. The curved fins provided in advance can increase the contact area between the medium and the inside of the tube body. At the same time, the curved fins can produce a turbulent effect when the medium flows, breaking the flow boundary layer, reducing thermal resistance, and further enhancing the heat transfer effect, so that the medium generates turbulence and eddy currents when flowing through the curved fins, increasing the contact area between the fluid and the fins, and improving the effect of convective heat transfer.

[0016] 3. The utility model can quickly remove the circular fin through the mounting seat and the ejector rod. When the circular fin is bent and needs to be removed, the ejector rod is pressed to move the ejector rod toward the inside of the mounting seat. At this time, the fixed seat on the ejector rod slides inside the limit cavity, and the fixed seat compresses the return spring. The ejector rod is continued to be pressed until one end of the ejector rod contacts and squeezes the fixed rod, so that the fixed rod is pressed back into the telescopic cavity. At this time, the fixed rod is disengaged from the slide groove, and the circular fin is pulled again to slide on the outside of the tube body until the mounting plate moves to another fixed rod. The fixed rod is pressed to enter the inside of the slide groove, and the ejector rod is pressed again to disengage the fixed rod from the slide groove. The above steps are repeated until the circular fin is removed from the tube body, which simplifies the removal steps of the circular fin and reduces the workload of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the internal structure of the utility model;

[0018] Figure 2 This is a side view of the internal structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the fin structure of the utility model;

[0020] Figure 4 For the utility model Figure 2 A partial enlarged view of area A in the middle.

[0021] In the figure: 1. Tube body; 2. Arc-shaped fixing plate; 3. Arc-shaped fin; 4. Mounting plate; 5. Circular fin; 7. Limiting plate; 8. Telescopic cavity; 9. Fixing rod; 10. Support spring; 11. Slide groove; 12. Fixing cavity; 13. Mounting seat; 14. Ejector rod; 15. Limiting cavity; 16. Fixing seat; 17. Return spring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-4 The utility model provides an embodiment: a fin tube structure of a heat exchanger, including a tube body 1, the front and rear ends of the outside of the tube body 1 are fixedly provided with limit plates 7, the upper and lower ends of the inside of the limit plate 7 are provided with a plurality of telescopic cavities 8, and the telescopic cavities 8 are equidistantly distributed, and the outside of the limit plate 7 is sleeved with a plurality of mounting plates 4, and the mounting plates 4 are equidistantly distributed, and the mounting plates 4 slide in cooperation with the limit plates 7, and four slide grooves 11 are provided inside the mounting plate 4 near the tube body 1, and the slide grooves 11 are a through-type structure, and eight fixed cavities 12 are provided inside the mounting plate 4 away from the tube body 1, and the fixed cavity 12 is a through-type structure, and one end of the fixed cavity 12 is connected to the slide groove 11.

[0024] During use, when fixing the circular fin 5, first align the opening on the mounting plate 4 with the limit plate 7 and sleeve the mounting plate 4 on the outside of the limit plate 7. At this time, slide the mounting plate 4 outside the tube body 1 until the mounting plate 4 slides in front of the fixing rod 9. At this time, press the fixing rod 9 to retract the fixing rod 9 into the telescopic cavity 8 and put the supporting spring 10 in a compressed state. Continue to move the mounting plate 4 to make the fixing rod 9 slide in the slide groove 11 until the fixing rod 9 moves to a certain position. At this time, the fixing rod 9 is in the opening position of the fixing cavity 12, and the supporting spring 10 is reset. The fixing rod 9 is pushed into the fixing cavity 12 by the reset of the supporting spring 10, so that the circular fin 5 is fixed to the outside of the tube body 1.

[0025] See also Figure 2 and Figure 4 A fixing rod 9 is provided inside the telescopic cavity 8, one end of the fixing rod 9 extends to the inside of the fixing cavity 12, the fixing rod 9 slides with the telescopic cavity 8, and the other end of the fixing rod 9 located inside the telescopic cavity 8 is fixedly provided with a support spring 10, and the other end of the support spring 10 is fixedly connected to the inner wall of the telescopic cavity 8, so that the fixing rod 9 can be driven to reset by the support spring 10.

[0026] See also Figure 2A mounting seat 13 is fixedly provided at the upper end of the mounting plate 4 at the opening position of the fixed cavity 12 , and a limiting cavity 15 is provided inside the mounting seat 13 to facilitate the installation of the ejector rod 14 through the mounting seat 13 .

[0027] See also Figure 2 and Figure 4 A ejector rod 14 is provided inside the limiting cavity 15, one end of the ejector rod 14 extends to the outside of the mounting seat 13, the ejector rod 14 slides with the limiting cavity 15, and a fixing seat 16 is fixed on both sides of the ejector rod 14 located inside the limiting cavity 15. The fixing seat 16 and the limiting cavity 15 are slidably limited, so that the fixing rod 9 is squeezed into the telescopic cavity 8 through the ejector rod 14.

[0028] See also Figure 2 and Figure 4 A reset spring 17 is fixedly provided at one end of the fixing seat 16 , and the other end of the reset spring 17 is fixedly connected to the inner wall of the limiting cavity 15 , so that the ejection rod 14 can be reset by the reset spring 17 .

[0029] See also Figure 1 and Figure 2 Arc-shaped fixing plates 2 are provided at the upper and lower parts of the tube body 1. The arc-shaped fixing plates 2 are welded and fixed to the tube body 1. A plurality of arc-shaped fins 3 are provided at one end of the arc-shaped fixing plate 2 close to the center of the tube body 1. The arc-shaped fins 3 are equidistantly distributed. The arc-shaped fins 3 are welded and fixed to the arc-shaped fixing plate 2, so as to increase the contact area between the medium and the inner wall of the tube body 1 through the arc-shaped fins 3.

[0030] See also Figure 1 and Figure 2 A circular fin 5 is provided at the middle position of the outside of the mounting plate 4 , and the circular fin 5 is welded and fixed to the mounting plate 4 , so as to improve the heat dissipation of the tube body 1 through the circular fin 5 .

[0031] Working principle: When the tube body 1 is in use, the medium flows inside the tube body 1. The arc-shaped fins 3 provided in advance can increase the contact area between the medium and the inside of the tube body 1. At the same time, the arc-shaped fins 3 can produce a turbulent effect when the medium flows, breaking the flow boundary layer and reducing thermal resistance. When the circular fins 5 are bent and need to be removed, the ejector rod 14 is pressed to move the ejector rod 14 toward the inside of the mounting seat 13. At this time, the fixed seat 16 on the ejector rod 14 slides inside the limit cavity 15, and the fixed seat 16 presses the reset spring 17. Compression is performed, and the ejector rod 14 is continued to be pressed until one end of the ejector rod 14 contacts and squeezes the fixing rod 9, so that the fixing rod 9 is pressed back into the telescopic cavity 8. At this time, the fixing rod 9 is disengaged from the chute 11, and the circular fin 5 is pulled again to slide the circular fin 5 outside the tube body 1 until the mounting plate 4 moves to another fixing rod 9, press the fixing rod 9 to make it enter the chute 11, and then press the ejector rod 14 to disengage the fixing rod 9 from the chute 11, and repeat the above steps until the circular fin 5 is removed from the tube body 1.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A finned tube structure for a heat exchanger, comprising a tube body (1), characterized in that: The front and rear ends of the outer tube body (1) are fixedly provided with a limit plate (7), the upper and lower ends of the inner tube body (7) are provided with a plurality of telescopic cavities (8), and the telescopic cavities (8) are evenly distributed. The outer tube body (7) is sleeved with a plurality of mounting plates (4), and the mounting plates (4) are evenly distributed. The mounting plates (4) and the limit plate (7) are slidably matched. The mounting plate (4) is provided with four slide grooves (11) near the inner tube body (1), and the slide grooves (11) are of a through-type structure. The inner tube body (1) of the mounting plate (4) is provided with eight fixed cavities (12), and the fixed cavities (12) are of a through-type structure. The invention relates to a structure in which one end of the fixed cavity (12) is communicated with the slide groove (11), a fixed rod (9) is provided inside the telescopic cavity (8), one end of the fixed rod (9) extends into the interior of the fixed cavity (12), the fixed rod (9) and the telescopic cavity (8) are slidably matched, the other end of the fixed rod (9) located inside the telescopic cavity (8) is fixedly provided with a support spring (10), the other end of the support spring (10) is fixedly connected to the inner wall of the telescopic cavity (8), the upper end of the mounting plate (4) located at the opening position of the fixed cavity (12) is fixedly provided with a mounting seat (13), and a limit cavity (15) is provided inside the mounting seat (13).

2. The finned tube structure of a heat exchanger according to claim 1, characterized in that: An ejector rod (14) is provided inside the limiting cavity (15), one end of the ejector rod (14) extends to the outside of the mounting seat (13), the ejector rod (14) and the limiting cavity (15) are slidably matched, and fixed seats (16) are fixedly provided on both sides of the ejector rod (14) located inside the limiting cavity (15), and the fixed seats (16) and the limiting cavity (15) are slidably limited.

3. The finned tube structure of a heat exchanger according to claim 2, characterized in that: A return spring (17) is fixedly provided at one end of the fixing seat (16), and the other end of the return spring (17) is fixedly connected to the inner wall of the limiting cavity (15).

4. The fin tube structure of a heat exchanger according to claim 3, characterized in that: Arc-shaped fixing plates (2) are provided at the upper and lower parts of the tube body (1), and the arc-shaped fixing plates (2) are welded and fixed to the tube body (1). A plurality of arc-shaped fins (3) are provided at one end of the arc-shaped fixing plate (2) close to the center of the tube body (1), and the arc-shaped fins (3) are distributed at equal intervals. The arc-shaped fins (3) are welded and fixed to the arc-shaped fixing plate (2).

5. The fin tube structure of a heat exchanger according to claim 4, characterized in that: A circular fin (5) is provided at a middle position outside the mounting plate (4), and the circular fin (5) is fixed to the mounting plate (4) by welding.

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