Finned tube bending machine and single elbow combined continuous finned tube

Abstract

The utility model relates to a kind of finned tube bending machine and single elbow combined continuous finned tube, for roll bending finned tube 20, it is equipped with rotating swing swing frame 10, swing frame 10 is equipped with fixed roller 11 and rotating roller 12, finned tube 20 passes between the fixed roller 11 and rotating roller 12, fixed roller 11 is coaxial with the rotation center of swing frame, rotating roller 12 rotates with swing frame 10 swing, rotating roller 12 rotates around fixed roller 11, roller finned tube 20.The utility model uses finned tube bending machine to bend 180 ° elbow at the end of finned tube, the other end of finned tube is not limited by length, can reduce 50% welding tooling quantity in the production process of S-shaped finned tube;Finned tube bending machine uses rotating roller and finned tube guide frame with opening and closing function, can realize lateral feeding, for the finned tube of large length, it is convenient to process operation;Single elbow combined continuous finned tube production process 50% welding tooling quantity.

Description

Technical Field

[0001] This utility model relates to finned tube forming and processing technology, and in particular to a finned tube bending machine and a single-bend combined continuous finned tube. Background Technology

[0002] S-shaped finned tubes are commonly used heat exchangers in large refrigeration equipment. Currently, the manufacturing process for S-shaped finned tubes still involves welding straight finned tubes to both ends of the bend. This process involves numerous welding points and a large amount of welding work, which is detrimental to ensuring product quality. Chinese utility model patent (CN2023113716911) discloses a "Finned Tube Reciprocating Bending Device," which can bend long finned tube profiles, achieving a multi-stage bending and rotating structure for the entire S-shaped aluminum alloy finned tube. This avoids or reduces welding connections, improving the processing efficiency and quality of aluminum alloy finned tubes. However, such processing equipment is bulky, requiring large-scale production facilities, and the length of finned tubes it can process is limited. For some ultra-long aluminum alloy finned tubes, a segmented bending process combined with welding is still required. Utility Model Content

[0003] The purpose of this utility model is to propose a technical solution for a finned tube bending machine and a single-bend combined continuous finned tube, thereby reducing the amount of welding processing in the manufacturing of S-shaped finned tubes and improving production efficiency and product quality.

[0004] To achieve the above objectives, the technical solution of this utility model is: a finned tube bending machine for roller bending finned tubes 20, which is provided with a rotating swing frame 10. The swing frame 10 is provided with a fixed roller 11 and a rotating roller 12. The finned tube 20 passes through the fixed roller 11 and the rotating roller 12. The fixed roller 11 is coaxial with the rotation center of the swing frame. The rotating roller 12 swings and rotates with the swing frame 10. The rotating roller 12 rotates around the fixed roller 11 to roller the finned tube 20.

[0005] Furthermore, in order to allow the finned tube to enter from the side between the rotating roller and the fixed roller, the swing frame 10 is provided with a rotating roller opening and closing shaft 13. The rotating roller opening and closing shaft 13 is an eccentric shaft relative to the rotating roller 12. The rotating roller opening and closing shaft 13 drives the rotating roller 12 to swing between the closed position and the unfolded position. When the rotating roller 12 is in the closed position, it approaches the fixed roller 11 and rolls the finned tube 20. When the rotating roller 12 is in the unfolded position, it separates from the fixed roller.

[0006] Furthermore, in order to enable the rotating roller to open and close relative to the fixed roller, the swing frame 10 is provided with a rotating roller opening and closing drive motor 14. The rotating roller opening and closing drive motor 14 is a linear motor, and the rotating roller opening and closing drive motor 14 drives the rotating roller opening and closing shaft 13 to rotate through a rack 15 and a gear 16.

[0007] Furthermore, in order to fix the finned tube and enable it to enter the finned tube guide frame from the side, the finned tube bending machine is provided with a finned tube guide frame 30. The finned tube guide frame 30 is provided with a fixed guide block 31 and a movable guide block 32. The finned tube 20 passes through the fixed guide block 31 and the movable guide block 32. When the movable guide block 32 is closed with the fixed guide block 31, it clamps the finned tube.

[0008] Furthermore, in order to move the movable guide block, the finned tube guide frame 30 is provided with a movable guide block drive cylinder 33, which drives the movable guide block 32 to move.

[0009] Furthermore, in order to drive the swing frame to rotate and roll the finned tube, the finned tube bending machine is equipped with a main drive motor 40, which drives the swing frame 10 to rotate through a sprocket 41.

[0010] Furthermore, in order to drive the swing frame more reliably and safely, the finned tube bending machine is equipped with a main drive motor 40, which drives the swing frame 10 to rotate through a worm gear reducer.

[0011] A single-bend combined continuous finned tube includes a single-bend finned tube 21 manufactured by a finned tube bending machine, wherein one end of the single-bend finned tube 21 is provided with a 180° bend 22, and multiple single-bend finned tubes 21 are connected end to end.

[0012] Furthermore, a method for connecting multiple single-bend finned tubes 21 is provided, wherein the multiple single-bend finned tubes 21 are connected end-to-end by welding.

[0013] Furthermore, to facilitate connection and processing and ensure good mechanical performance, the elbow 22 includes a straight section 23 and an elbow extension section 24 that connect the elbow 22. The elbow extension section 24 rotates 180° relative to the straight section 23, and the length L1 of the straight section is greater than the length L2 of the elbow extension section.

[0014] The beneficial effects of this utility model are: by using a finned tube bending machine to bend one end of the finned tube into a 180° bend, the other end of the finned tube is not limited by length, which can reduce the amount of welding tooling in the production of S-shaped finned tubes by 50%; the finned tube bending machine adopts a rotating roller with opening and closing function and a finned tube guide frame, which can realize side feeding, and facilitates processing of long finned tubes; compared with the traditional finned tube structure, the single bend combined continuous finned tube production process reduces the amount of welding tooling by 50%, which is suitable for producing combined finned tubes with a longer length.

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the utility model. The main drive motor 40 drives the swing frame shaft 17 to rotate through the sprocket 41. Figure 2 From Figure 1 The observed structural diagram; Figure 3 This is a partial structural diagram of the swing frame 10 of this utility model; Figure 4 This is a schematic diagram of the rotating state of the opening and closing shaft 13 of the rotating roller of this utility model; Figure 5 This is a schematic diagram of the rotating state of the swing frame 10 of this utility model; Figure 6 This is a schematic diagram of the unfolded rotating roller 12 of this utility model; Figure 7 This is a structural diagram of the main drive motor 40 driving the swing frame shaft 17 through a worm gear reducer. Figure 8 This is a schematic diagram of the finned tube being installed from the side in this utility model; Figure 9 This is a schematic diagram of the finned tube 20 being installed into a finned tube bending machine according to the present invention; Figure 10 This is a schematic diagram of the rotating roller 12 pressing the finned tube 20 of this utility model; Figure 11 This is a schematic diagram of how the finned tube 20 is rolled into a single-bend finned tube 21 according to the present invention; Figure 12 This is a schematic diagram of removing the single-bend finned tube 21 according to the present invention; Figure 13 This is a structural diagram of the single-bend finned tube 21 of this utility model; Figure 14 This is a schematic diagram of welding two single-bend finned tubes 21; Figure 15 This is a structural diagram of the single-bend combined continuous finned tube of this utility model. Detailed Implementation

[0017] Example 1: like Figures 1 to 6 A finned tube bending machine for roller bending finned tubes 20.

[0018] In this embodiment, the finned tube 20 is an aluminum alloy finned tube. The finned tube 20 is a double-finned tube, including a core tube 20a and two symmetrical fins 20b.

[0019] The finned tube bending machine is equipped with a rotating swing frame 10, on which a fixed roller 11 and a rotating roller 12 are provided. The fixed roller 11 has an arc-shaped annular groove 11a in the middle, corresponding to the core tube 20a of the finned tube, and the rotating roller 12 has an arc-shaped annular groove 12a in the middle, corresponding to the core tube 20a of the finned tube.

[0020] The swing frame shaft 17 drives the swing frame 10 to swing and rotate. The fixed roller 11 is mounted on the swing frame shaft 17, that is, the fixed roller 11 is coaxial with the rotation center of the swing frame. The fixed roller 11 can rotate on the swing frame shaft 17.

[0021] The swing frame 10 is equipped with a roller opening and closing shaft 13, which is connected to a roller opening and closing frame 18. A roller shaft 19 is mounted on the roller opening and closing frame 18. The roller opening and closing shaft 13 is an eccentric shaft relative to the roller shaft 19. The roller 12 is mounted on the roller shaft 19, making the roller opening and closing shaft 13 an eccentric shaft relative to the roller 12. When the roller opening and closing shaft 13 rotates, it drives the roller 12 to swing between a closed position and an open position. In the closed position (e.g., ...), the roller 12... Figure 1 When the roller 12 is in the unfolded position (as shown in the figure), it approaches the fixed roller 11 and can roll the finned tube 20; Figure 6 When the position shown is reached, the rotating roller 12 separates from the fixed roller 11, creating a sufficiently large gap so that the finned tube 20 can enter from the side between the rotating roller 12 and the fixed roller 11, or be removed from between the rotating roller 12 and the fixed roller 11.

[0022] The swing frame 10 is equipped with a roller opening and closing drive motor 14. The roller opening and closing drive motor 14 is a linear motor. The roller opening and closing drive motor 14 drives the roller opening and closing shaft 13 to rotate on the swing frame 10 through the rack 15 and the gear 16, so that the roller 12 swings between the closed position and the open position.

[0023] The finned tube bending machine is equipped with a finned tube guide frame 30, which includes a fixed guide block 31 and a movable guide block 32. The fixed guide block 31 has an arc-shaped groove 31a corresponding to the core tube 20a of the finned tube, and the movable guide block 32 has an arc-shaped groove 32a corresponding to the core tube 20a of the finned tube. The finned tube 20 passes between the fixed guide block 31 and the movable guide block 32. The finned tube guide frame 30 is equipped with a movable guide block drive cylinder 33, which drives the movable guide block 32 to move. The movable guide block 32 moves between a closed position and an open position. In the closed position, the arc-shaped grooves 31a and 32a of the fixed guide block encircle the core tube 20a of the finned tube, and the movable guide block 32 and the fixed guide block 31 clamp the finned tube 20, stabilizing the finned tube 20 on the finned tube bending machine. When the movable guide block 32 is in the open position, the movable guide block 32 is separated from the fixed guide block 31, creating a sufficiently large gap so that the finned tube 20 can enter from the side between the movable guide block 32 and the fixed guide block 31, or be taken out from between the movable guide block 32 and the fixed guide block 31.

[0024] The finned tube bending machine is equipped with a main drive motor 40, which drives the swing frame shaft 17 to rotate via a sprocket 41, causing the swing frame 10 to swing and rotate. The swing frame shaft 17 is equipped with a driven sprocket 42, which is driven by the sprocket 41 of the main drive motor via a chain 43, thus driving the swing frame shaft 17.

[0025] When performing finned tube bending, such as Figure 8 As shown, first, the movable guide block 32 is put into the open position, and the rotating roller 12 is also put into the open position.

[0026] Then, the finned tube 20 is inserted laterally between the movable guide block 32 and the fixed guide block 31, and between the rotating roller 12 and the fixed roller 11. The movable guide block 32 is then closed, clamping the finned tube 20 between it and the fixed guide block 31. The rotating roller 12 is then moved to the closed position, allowing the finned tube 20 to pass between the fixed roller 11 and the rotating roller 12. The arc-shaped groove 11a of the fixed roller and the arc-shaped groove 12a of the rotating roller correspond to the core tube 20a of the finned tube. Figure 9 As shown.

[0027] Then, the main drive motor 40 is started, driving the swing frame 10 to rotate. The rotating roller 12 swings and rotates with the swing frame 10, and the rotating roller 12 rotates around the fixed roller 11, pressing the finned tube 20 and bending the finned tube, such as... Figure 10 As shown. Continue until one end of the finned tube is bent 180° to form a single-bend finned tube 21.

[0028] Then, reverse drive swing frame 10 to reset roller 12, as shown. Figure 11 As shown.

[0029] Next, move the rotating roller 12 to the unfolded position, opening the movable guide block 32, and remove the single-bend finned tube 21 from the side, as shown. Figure 12 As shown. Then the bending process for the next finned tube can be carried out.

[0030] In this embodiment, both the rotating roller 12 and the fixed roller 11 are rotatable, which can reduce friction with the finned tube.

[0031] In this embodiment, a 180° bend is formed at one end of the finned tube, while the other end of the finned tube is not limited by length. The finned tube bending machine in this embodiment occupies a small production area and uses a rotating roller with opening and closing function and a finned tube guide frame, which can realize lateral feeding and facilitate the processing of long finned tubes.

[0032] Of course, the finned tube bending machine of this utility model can also perform multiple bending processes on finned tubes.

[0033] Example 2: like Figure 7 A finned tube bending machine. This embodiment is an improvement on Embodiment 1.

[0034] In this embodiment, the main drive motor 40 drives the swing frame shaft 17 to rotate via the worm gear reducer 44, causing the swing frame 10 to swing and rotate. The worm gear reducer 44 is a dual worm gear computer.

[0035] The worm gear computer-driven swing frame shaft makes the finned tube bending machine compact, with high transmission reliability, low noise, and good safety.

[0036] Example 3: like Figures 13 to 15 A single-bend combined continuous finned tube is disclosed, comprising a single-bend finned tube 21 manufactured using the finned tube bending machine described in Embodiment 1. One end of the single-bend finned tube 21 has a 180° bend 22, with a straight section 23 and a bend extension section 24 connected to both ends of the bend 22, respectively. The bend extension section 24 rotates 180° relative to the straight section 23. The length L1 of the straight section is greater than the length L2 of the bend extension section. To facilitate bending and welding, the length L2 of the bend extension section can be 100mm to 200mm.

[0037] Multiple single-bend finned tubes 21 are combined to form a single-bend combined continuous finned tube, and the multiple single-bend finned tubes 21 are connected end to end.

[0038] like Figure 14 As shown, the connection method of the two single-bend finned tubes 21 is as follows: the straight section 23 of one single-bend finned tube 21 is connected to the bend extension section 24 of the other single-bend finned tube 21, and welding is performed at the connection point 25.

[0039] like Figure 15 As shown, multiple single-bend finned tubes 21 are paired together to form a single-bend combined continuous finned tube (or S-type finned tube) with multiple rows of finned tubes.

[0040] In this embodiment, the weld seam of the finned tube is close to the elbow 22, that is, the weld seam is close to both ends of the single elbow combined continuous finned tube, which facilitates welding and makes the single elbow combined continuous finned tube have better mechanical properties.

[0041] Compared to the traditional structure where straight finned tubes are welded to both ends of the elbow, this invention can reduce the amount of welding tooling required in the manufacturing process of S-shaped finned tubes by 50%, making it suitable for manufacturing combined finned tubes with longer lengths.

Claims

1. A finned tube bending machine for roller bending finned tubes (20), characterized in that, A swing frame (10) is provided for rotation and swinging. The swing frame (10) is provided with a fixed roller (11) and a rotating roller (12). The finned tube (20) passes between the fixed roller (11) and the rotating roller (12). The fixed roller (11) is coaxial with the rotation center of the swing frame. The rotating roller (12) swings and rotates with the swing frame (10). The rotating roller (12) rotates around the fixed roller (11) and rolls the finned tube (20).

2. The finned tube bending machine according to claim 1, characterized in that, The swing frame (10) is provided with a rotating roller opening and closing shaft (13), which is an eccentric shaft relative to the rotating roller (12). The rotating roller opening and closing shaft (13) drives the rotating roller (12) to swing between the closed position and the unfolded position. When the rotating roller (12) is in the closed position, it approaches the fixed roller (11) and rolls the finned tube (20). When the rotating roller (12) is in the unfolded position, it separates from the fixed roller.

3. The finned tube bending machine according to claim 2, characterized in that, The swing frame (10) is equipped with a roller opening and closing drive motor (14), which is a linear motor. The roller opening and closing drive motor (14) drives the roller opening and closing shaft (13) to rotate through a rack (15) and a gear (16).

4. The finned tube bending machine according to claim 1, characterized in that, The finned tube bending machine is provided with a finned tube guide frame (30), which is provided with a fixed guide block (31) and a movable guide block (32). The finned tube (20) passes through the fixed guide block (31) and the movable guide block (32). When the movable guide block (32) and the fixed guide block (31) are closed, the finned tube is clamped.

5. The finned tube bending machine according to claim 4, characterized in that, The finned tube guide frame (30) is equipped with a movable guide block drive cylinder (33), which drives the movable guide block (32) to move.

6. The finned tube bending machine according to claim 1, characterized in that, The finned tube bending machine is equipped with a main drive motor (40), which drives the swing frame (10) to rotate via a sprocket (41).

7. The finned tube bending machine according to claim 1, characterized in that, The finned tube bending machine is equipped with a main drive motor (40), which drives the swing frame (10) to rotate through a worm gear reducer.

8. A single-bend combined continuous finned tube, characterized in that, The invention includes a single-bend finned tube (21) made using a finned tube bending machine according to any one of claims 1 to 7, wherein one end of the single-bend finned tube (21) is provided with a 180° bend (22), and multiple single-bend finned tubes (21) are connected end to end.

9. The single-bend combined continuous finned tube according to claim 8, characterized in that, The single-bend finned tubes (21) mentioned above are connected by welding at both ends.

10. The single-bend combined continuous finned tube according to claim 8, characterized in that, It includes a straight section (23) connecting the elbow (22) and an elbow extension section (24), the elbow extension section (24) being rotated 180° relative to the straight section (23), and the length (L1) of the straight section being greater than the length (L2) of the elbow extension section.

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