A heat exchange tube assembly with turbulence fins

Abstract

The utility model discloses a turbulence fin heat exchange pipe subassembly relates to mechanical technical field, including the outer tube body, the inside center position of outer tube body is provided with the center column, the outer wall of center column is equipped with fin group, the inner wall of outer tube body is opened and is equipped with the inner tooth slot of equal interval arrangement, the number of inner tooth slot is 50, and the inner tooth slot between adjacent is equipped with the tooth spacing, the outer surface of tooth spacing is arc, the inner tooth slot is by U shape bottom groove, outer expansion groove and narrow down lane constitutes, narrow down lane, outer expansion groove and U shape bottom groove are by outside to inside in proper order to the axle of outer tube body setting, in the utility model, when the fluid flows into the inner tooth slot, first preliminary gathering in the relatively narrow U shape bottom groove, forms the vortex, realizes the heat preliminary mixing transmission, then enters the outer expansion groove, and the flow rate slows down, and the contact time with the inner wall of outer tube body increases, and further carries out the heat exchange, and then enters the narrow down lane, and the flow rate accelerates, has improved the heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, specifically to a turbulence-inducing finned heat exchanger tube assembly. Background Technology

[0002] In many industrial sectors, such as chemical, power, and refrigeration, heat exchange equipment is a key component for ensuring the normal operation of the system and achieving efficient energy utilization. In long-term application practice, traditional heat exchange tube assemblies have gradually revealed some problems that need to be solved, which seriously restrict the improvement of heat exchange efficiency.

[0003] Traditional heat exchanger tube assemblies have a relatively simple structural design. When the fluid flows inside the tube, the boundary layer is relatively stable, making it difficult to form effective turbulence. This results in insufficient heat transfer inside the fluid and underutilization of the heat exchange area, leading to low heat exchange efficiency and poor heat exchange effect, which cannot meet the growing demand for high-efficiency heat exchange. Utility Model Content

[0004] The purpose of this invention is to provide a turbulence-inducing finned heat exchanger tube assembly to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides a turbulence-inducing finned heat exchanger tube assembly, including an outer tube body. A central column is provided at the center of the inner part of the outer tube body. A fin group is provided on the outer wall of the central column. The inner wall of the outer tube body is provided with 50 equally spaced internal toothed grooves. Toothed partitions are provided between adjacent internal toothed grooves. The outer surface of the toothed partitions is arc-shaped. The internal toothed groove is composed of a U-shaped bottom groove, an outward expansion groove, and a narrowing channel. The narrowing channel, the outward expansion groove, and the U-shaped bottom groove are arranged sequentially from the outside to the inside toward the axis of the outer tube body.

[0006] Furthermore, the fin group is fixed in a trident shape between the outer tube and the fish scale-like pits, and the fin group is arranged at equal intervals on the outer arc wall of the central column and the number is greater than 1.

[0007] Furthermore, the fin assembly consists of three annular arrays of fins, each fin having a semi-arc longitudinal section. The outer arc surface of the fin assembly is composed of an outwardly expanding arc surface and an inwardly concave arc surface. The number of outwardly expanding arc surfaces is 6, and the number of inwardly concave arc surfaces is 5. The outwardly expanding arc surfaces and the inwardly concave arc surfaces are arranged alternately.

[0008] Furthermore, the outer arc wall of the fin assembly is provided with staggered fish-scale-shaped pits, the diameter of which is 1-2 mm and the depth is 0.3 mm.

[0009] Furthermore, the fins of adjacent fin groups are staggered, with a stagger angle of 22.5°.

[0010] Furthermore, the outer surface of the toothed partition is provided with an S-shaped flow channel.

[0011] Furthermore, the longitudinal cross-sectional width of the expanding groove is greater than the longitudinal cross-sectional width of the U-shaped bottom groove, which in turn is greater than the longitudinal cross-sectional width of the narrowing channel.

[0012] Furthermore, the fin assembly is made of aluminum-copper composite foil, and the outer tube is made of 304 stainless steel.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this invention, when fluid flows into the inner toothed groove, it first initially gathers in the relatively narrow U-shaped bottom groove to form a vortex, achieving initial heat mixing and transfer. Then, it enters the outer expansion groove, where the flow velocity slows down and the contact time with the inner wall of the outer tube increases, further facilitating heat exchange. Finally, it enters the narrowing channel, where the flow velocity accelerates, and the resulting strong shear force disrupts the fluid boundary layer, promoting heat transfer. This gradually changing width design forms a complete fluid flow and heat exchange optimization system, enabling the fluid to achieve efficient heat exchange at different stages, greatly improving heat exchange efficiency.

[0015] 2. This invention utilizes the complex flow and vortices generated at the special shape and structure of the fin assembly when the fluid comes into contact with it. These vortices disrupt the fluid boundary layer, allowing for better heat transfer and mixing within the fluid. Simultaneously, the staggered distribution of fins in adjacent fin assemblies causes the fluid to continuously change its flow direction as it passes through different fin assemblies, further enhancing the turbulence and heat transfer effect. This effectively increases the heat transfer area and significantly improves heat transfer efficiency. The outer surface of the toothed baffle is arc-shaped, reducing resistance and energy loss as the fluid flows through it, ensuring smooth fluid flow. The S-shaped flow channel effectively disrupts the fluid boundary layer, allowing for more thorough heat transfer and mixing within the fluid, significantly enhancing the heat transfer effect. Furthermore, the continuous curved structure of the S-shaped flow channel prevents dead zones in the fluid flow, ensuring that the fluid participates in the heat transfer process uniformly throughout the entire flow channel, further improving the uniformity of heat transfer. Attached Figure Description

[0016] Figure 1 A schematic diagram of the main body of a turbulence-inducing finned heat exchanger tube assembly;

[0017] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0018] Figure 3 A schematic diagram of the outer surface structure of a toothed baffle in a turbulence-inducing finned heat exchanger tube assembly;

[0019] Figure 4 This is a schematic diagram of the fin structure of a finned heat exchanger tube assembly.

[0020] In the picture:

[0021] 1. Outer tube body; 2. Fish scale-shaped pits; 3. Central column; 4. Fin assembly; 5. Inner toothed groove; 6. Toothed partition; 7. U-shaped bottom groove; 8. Outer expansion groove; 9. Narrowing channel; 10. S-shaped flow channel; 11. Outer expansion arc surface; 12. Inner concave arc surface. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] See Figure 1 and Figure 2 As shown, a turbulence-inducing finned heat exchanger tube assembly includes an outer tube body 1. A central column 3 is disposed at the center of the inner part of the outer tube body 1. A fin group 4 is disposed on the outer wall of the central column 3. An inner toothed groove 5 is provided on the inner wall of the outer tube body 1 at equal intervals. The number of inner toothed grooves 5 is 50. A toothed partition 6 is disposed between adjacent inner toothed grooves 5. The outer surface of the toothed partition 6 is arc-shaped. The inner toothed groove 5 is composed of a U-shaped bottom groove 7, an outer expansion groove 8, and a narrowing channel 9. The narrowing channel 9, the outer expansion groove 8, and the U-shaped bottom groove 7 are arranged from the outside to the inside toward the axis of the outer tube body 1.

[0025] In the specific implementation process, when the fluid flows into the turbulent finned heat exchanger tube assembly, it first enters the annular channel between the outer tube body 1 and the central column 3. Due to the presence of the central column 3, the fluid is guided during its flow and flows around the central column 3. As the fluid flows, it encounters the inner toothed groove 5 on the inner wall of the outer tube body 1. When the fluid enters the inner toothed groove 5, it first enters the U-shaped bottom groove 7, where a vortex is formed, allowing for preliminary mixing and transfer of heat within the fluid. Then, the fluid flows from the U-shaped bottom groove 7 to the outward expansion groove 8. Due to the expansion effect of the outward expansion groove 8, the fluid velocity slows down, increasing the contact time with the inner wall of the outer tube body 1, further facilitating heat exchange. The fluid enters the narrowing channel 9 from the outer expansion groove 8, where the flow velocity increases. The resulting shear force disrupts the fluid boundary layer, enhancing the heat exchange effect. As the fluid flows through the inner toothed groove 5, the toothed baffle 6 acts as a separator and guide, ensuring that the fluid flows through each inner toothed groove 5 in sequence and avoiding short-circuiting. At the same time, the fin assembly 4 on the outer wall of the central column 3 also makes full contact with the fluid. The special shape and arrangement of the fin assembly 4 will generate complex turbulence in the fluid, further increasing the heat exchange area and improving the heat exchange efficiency. The fluid flows continuously in the outer tube 1, and through the action of multiple inner toothed grooves 5 and fin assembly 4, it exchanges heat fully with the outer tube 1 and the central column 3, ultimately achieving the purpose of efficient heat exchange.

[0026] It should be noted that the main function of the toothed partition 6 is to separate adjacent inner toothed grooves 5, prevent short-circuiting of the fluid during flow, and ensure that the fluid can flow through each inner toothed groove 5 in sequence according to the predetermined path. The arc-shaped outer surface design can reduce the resistance of the fluid when flowing through the toothed partition 6 and reduce energy loss.

[0027] The outer tube 1 and the central column 3 are connected by a radial support structure and fixed by three sets of support ribs evenly distributed at 120°. One end of the support rib is welded to the inner wall of the outer tube 1 and the other end is welded to the outer wall of the central column 3. The welding points are treated with argon arc welding to ensure connection strength and sealing. The thickness of the support rib is 1.2 times the wall thickness of the outer tube 1, and the width is gradually designed along the fluid flow direction. The connection parts of the support rib with the outer tube 1 and the central column 3 are all rounded with a radius of 3mm, which can effectively reduce the local resistance loss generated when the fluid flows through.

[0028] See Figure 1 and Figure 4As shown, the fin group 4 is fixed in a trident shape between the outer tube 1 and the fish scale-shaped pits 2. The fin groups 4 are arranged at equal intervals on the outer arc wall of the central column 3 and the number is greater than 1. The fin group 4 is composed of three ring arrays of fins. The longitudinal section of each fin is semi-arc. The outer arc surface of the fin group 4 is composed of an outwardly expanding arc surface 11 and an inwardly concave arc surface 12. There are 6 outwardly expanding arc surfaces 11 and 5 inwardly concave arc surfaces 12. The outwardly expanding arc surfaces 11 and the inwardly concave arc surfaces 12 are staggered. The outer arc wall of the fin group 4 is provided with staggered fish scale-shaped pits 2. The diameter of the fish scale-shaped pits 2 is 1-2 mm and the depth is 0.3 mm. The fins of adjacent fin groups 4 are staggered and the staggered angle is 22.5°.

[0029] In the specific implementation process, when the fluid flows into the outer tube 1, it is first guided by the central column 3 and flows along the outer arc wall of the central column 3. During the flow, the fluid comes into contact with the fin group 4. Due to the special shape and structure of the fin group 4, the fluid will generate complex flow and vortices on the semi-arc surface of the fins, the outwardly expanding arc surface 11, the inwardly concave arc surface 12, and the fish scale-shaped pits 2. These vortices can destroy the boundary layer of the fluid, so that the heat inside the fluid can be better transferred and mixed. At the same time, the staggered distribution of the fins of adjacent fin groups 4 makes the fluid constantly change its flow direction when flowing through different fin groups 4, further enhancing the turbulence and heat exchange effect of the fluid. The fluid flows continuously in the outer tube 1 and, through the action of multiple fin groups 4, fully exchanges heat with the outer tube 1 and the central column 3, ultimately achieving the purpose of efficient heat exchange.

[0030] It should be noted that: the trident-shaped layout of the fin group 4 can enhance fluid segmentation and rotation; the convex structure of the outwardly expanding arc surface 11 accelerates the fluid and generates a local high-pressure zone; the concave structure of the inwardly concave arc surface 12 induces eddies and enhances heat exchange; the alternating distribution of the outwardly expanding arc surface 11 and the inwardly concave arc surface 12 forms periodic flow disturbances; the fish-scale-shaped pits 2 further disrupt the laminar boundary layer; and the fins of adjacent fin groups 4 are misaligned by 22.5° to avoid flow dead zones and ensure full-domain turbulence.

[0031] See Figure 1 and Figure 3 As shown, the outer surface of the toothed partition 6 is provided with an S-shaped flow channel 10, the longitudinal section width of the outer expansion groove 8 is greater than the longitudinal section width of the U-shaped bottom groove 7 and the longitudinal section width of the narrowing channel 9, the fin assembly 4 is made of aluminum-copper composite foil, and the outer tube 1 is made of 304 stainless steel.

[0032] In the specific implementation process, when the fluid flows inside the outer tube 1, the S-shaped flow channel 10 can guide the fluid to flow along an S-shaped path, which greatly increases the flow path of the fluid. During the flow process, the fluid constantly changes direction, which will generate strong eddies and turbulence in the flow channel. These complex flow phenomena can effectively destroy the fluid boundary layer, so that the heat inside the fluid can be transferred and mixed more fully, thereby significantly enhancing the heat exchange effect. Moreover, the continuous bending structure of the S-shaped flow channel 10 can also avoid the fluid from having dead flow angles, ensuring that the fluid can participate in the heat exchange process uniformly throughout the entire flow channel, thus improving the uniformity of heat exchange.

[0033] When the fluid flows into the inner toothed groove 5, it first enters the U-shaped bottom groove 7. The relatively narrow U-shaped bottom groove 7 causes the fluid to initially gather, forming a certain flow velocity and pressure. Then, the fluid enters the outer expansion groove 8. Due to the increased longitudinal cross-sectional width of the outer expansion groove 8, the fluid flow velocity slows down and the pressure decreases. This change in flow velocity and pressure allows the fluid more time to exchange heat with the inner wall of the outer tube 1. At the same time, the fluid diffuses in all directions within the outer expansion groove 8, further increasing the contact area with the inner wall and improving the heat exchange efficiency. Subsequently, the fluid enters the narrowing channel 9. The longitudinal cross-sectional width of the narrowing channel 9 decreases, and the fluid flow velocity increases again. The strong shear force generated can further disrupt the fluid boundary layer, promote heat transfer, and further enhance the heat exchange effect. This gradually changing width design forms a complete fluid flow and heat exchange optimization system, enabling the fluid to achieve efficient heat exchange at different stages.

[0034] The fin assembly 4 is made of aluminum-copper composite foil, which gives it both high thermal conductivity and good durability. It can work stably under various complex working conditions, providing a reliable guarantee for efficient heat exchange. The outer tube 1 is made of 304 stainless steel, which is resistant to high pressure and corrosion. It can ensure that the outer tube 1 maintains structural stability when subjected to internal fluid pressure and external environmental forces, and is not prone to deformation or damage, thus ensuring the normal operation of the heat exchange tube assembly.

[0035] Working principle:

[0036] Step 1: When the fluid flows into the heat exchanger tube assembly, it first enters the annular channel between the outer tube body 1 and the central column 3. Guided by the central column 3, it flows around it. When it encounters the inner toothed groove 5, it first enters the U-shaped bottom groove 7 to form a vortex and carry out preliminary heat mixing and transfer. Then it flows to the outer expansion groove 8. Due to the expansion effect, the flow velocity slows down and the contact time with the inner wall of the outer tube body 1 increases, further exchanging heat. Then it enters the narrowing channel 9, where the flow velocity increases and the shear force destroys the fluid boundary layer, enhancing the heat exchange effect. During the process, the toothed baffle 6 separates and guides the fluid, ensuring that it flows through each inner toothed groove 5 in sequence to avoid short circuits. At the same time, the fin group 4 on the outer wall of the central column 3 is in full contact with the fluid. Its special shape and arrangement make the fluid generate complex turbulence, increasing the heat exchange area and improving the heat exchange efficiency.

[0037] Step 2: When the fluid flows into the outer tube 1, it is guided by the central column 3 to flow along its outer arc wall and come into contact with the fin group 4. Complex flow and eddies are generated at its special shape and structure, which destroys the fluid boundary layer and makes heat transfer and mixing better. In addition, the staggered distribution of the fins of the adjacent fin group 4 makes the fluid constantly change the flow direction, which enhances the degree of turbulence and heat transfer effect.

[0038] Step 3: When the fluid flows inside the outer tube 1, the S-shaped flow channel 10 guides the fluid to flow along an S-shaped path, increasing the flow path, generating strong eddies and turbulence, disrupting the boundary layer, enhancing the heat transfer effect, and avoiding dead zones. When the fluid flows into the inner toothed groove 5, the grooves of different widths cause changes in fluid velocity and pressure, forming a complete fluid flow and heat transfer optimization system. The fin assembly 4 material ensures high-efficiency heat conduction and durability, while the outer tube 1 material is resistant to high pressure and corrosion, ensuring structural stability and the normal operation of the components.

[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A turbulence-inducing finned heat exchanger tube assembly, comprising an outer tube body (1), characterized in that, A central column (3) is provided at the center of the inner tube (1). The outer wall of the central column (3) is provided with a fin group (4). The inner wall of the outer tube (1) is provided with equally spaced internal tooth grooves (5). There are 50 internal tooth grooves (5). A tooth partition (6) is provided between adjacent internal tooth grooves (5). The outer surface of the tooth partition (6) is arc-shaped. The internal tooth groove (5) is composed of a U-shaped bottom groove (7), an outer expansion groove (8), and a narrowing channel (9). The narrowing channel (9), the outer expansion groove (8), and the U-shaped bottom groove (7) are arranged from the outside to the inside toward the axis of the outer tube (1).

2. The turbulence-inducing finned heat exchanger tube assembly as described in claim 1, characterized in that: The fin group (4) is fixed in a trident shape between the outer tube (1) and the fish scale-shaped pit (2). The fin group (4) is arranged at equal intervals on the outer arc wall of the central column (3) and the number is greater than 1.

3. The turbulence-inducing finned heat exchanger tube assembly as described in claim 2, characterized in that: The fin group (4) consists of three annular arrays of fins. The longitudinal section of each fin is semi-arc. The outer arc surface of the fin group (4) consists of an outwardly expanding arc surface (11) and an inwardly concave arc surface (12). There are 6 outwardly expanding arc surfaces (11) and 5 inwardly concave arc surfaces (12). The outwardly expanding arc surfaces (11) and the inwardly concave arc surfaces (12) are staggered.

4. The turbulence-inducing finned heat exchanger tube assembly as described in claim 3, characterized in that: The outer arc wall of the fin assembly (4) is provided with staggered fish scale-shaped pits (2), the diameter of which is 1-2 mm and the depth is 0.3 mm.

5. The turbulence-inducing finned heat exchanger tube assembly as described in claim 4, characterized in that: The fins of adjacent fin groups (4) are staggered, with a stagger angle of 22.5°.

6. The turbulence-inducing finned heat exchanger tube assembly as described in claim 1, characterized in that: The outer surface of the toothed partition (6) is provided with an S-shaped flow channel (10).

7. The turbulence-inducing finned heat exchanger tube assembly as described in claim 1, characterized in that: The longitudinal section width of the outer expansion groove (8) is greater than the longitudinal section width of the U-shaped bottom groove (7) and the longitudinal section width of the narrowing channel (9).

8. The turbulence-inducing finned heat exchanger tube assembly as described in claim 1, characterized in that: The fin assembly (4) is made of aluminum-copper composite foil, and the outer tube (1) is made of 304 stainless steel.

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