A pipe bending machine for flat tube heat exchanger

Abstract

The utility model discloses a kind of elbow pipe forming machines for flat tube heat exchanger, including base, the front end position of base is fixedly connected with elbow pipe forming machine by extension frame;The top of base is symmetrically provided with two sliding grooves, two The sliding groove is slidably connected with corresponding four sliding blocks, four The sliding block is respectively fixedly arranged in the two sides of corresponding two side frame bottom end, and the bottom end of two The side frame side is fixedly provided with connecting frame. Two-way screw rod is rotated by servo motor drive, since two connecting frames are respectively connected with the thread connection of two-way screw rod outer wall two sides, the opposite or back synchronous movement of two side frames can be realized, so that the side frame spacing can be automatically adjusted according to different specifications flat tube heat exchanger, realize the self-adapting installation and processing of equipment to different size elbow pipe, significantly improve the flexibility and degree of automation of clamping.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger processing technology, specifically a tube bending forming machine for flat tube heat exchangers. Background Technology

[0002] Flat-tube heat exchangers are highly efficient and compact heat exchange devices, characterized by the use of hollow tubes with a flat cross-section as heat transfer elements. Compared to traditional round tubes, this flat tube design allows for a larger surface area of ​​the tube wall within a unit volume, resulting in extremely high space utilization and heat transfer efficiency. The interior of the flat tube typically contains multiple fine parallel flow channels (porous microchannel structure), which not only further increases the heat transfer area but also effectively promotes uniform distribution and turbulence of the medium.

[0003] Ordinary tube bending forming machines mostly use a fixed-spacing side frame structure, which cannot automatically adjust according to different specifications and sizes of flat tube heat exchanger tubes. It requires manual replacement of limit components or repositioning of the side frame, which is not only cumbersome to adjust, but also prone to inaccurate clamping, affecting the forming quality of the tube. Moreover, traditional roller conveyor devices are usually fixed on the frame, and their conveying angle cannot be adjusted synchronously according to the curvature or position of the tube. During the tube bending process, it is easy to cause uneven stress on the flat tube, resulting in deformation, slippage or jamming, affecting the stability and accuracy of tube forming. Therefore, a tube bending forming machine for flat tube heat exchangers is designed. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide a tube bending forming machine for flat tube heat exchangers, thereby resolving the issues raised in the background section.

[0005] To achieve the above objectives, this utility model proposes a tube bending forming machine for flat tube heat exchangers, including a base, the front end of which is fixedly connected to the tube bending forming machine via an extension frame; The base has two symmetrical sliding grooves at its top, which are slidably connected to four corresponding sliders. The four sliders are fixedly mounted on both sides of the bottom of the two corresponding side frames. A connecting frame is fixedly mounted on the bottom of one side of each of the two side frames. The two connecting frames are threadedly connected to both sides of the outer wall of the bidirectional lead screw. The bidirectional lead screw is inserted into the middle seat, which is fixedly mounted in the middle of one side of the base. The two ends of the bidirectional lead screw are rotatably connected to the inner wall of the corresponding L-shaped shaft seat. The two L-shaped shaft seats are fixedly mounted on one end of each side of the base. A guide tilting mechanism is provided on the inner side of each of the two side frames.

[0006] In one example, a servo motor is fixedly mounted on the outer side of one of the L-shaped bearings, and the output end of the servo motor is fixedly connected to one end of a bidirectional lead screw.

[0007] In one example, the guide tilting mechanism includes a roller conveyor that is rotatably mounted on a rotating shaft and side frame. A drive motor is fixedly mounted at one end of the outer side of each of the two side frames. The output end of the drive motor passes through the corresponding side frame and is fixedly connected to the eccentric position of the corresponding eccentric wheel.

[0008] In one example, the outer sides of the two eccentric wheels are in contact with the bottom of the corresponding roller conveyor.

[0009] In one example, a switch panel is fixedly provided in the middle of one side of the base. A drive motor switch and a servo motor switch are fixedly provided on the surface of the switch panel. The drive motor and the servo motor are electrically connected to an external power supply through the drive motor switch and the servo motor switch, respectively.

[0010] The tube bending and forming machine for flat tube heat exchangers proposed in this utility model can bring the following beneficial effects: Driven by a servo motor, the bidirectional lead screw rotates. Since the two connecting frames are threaded to both sides of the outer wall of the bidirectional lead screw, the two side frames can move synchronously towards or away from each other. This allows for automatic adjustment of the side frame spacing according to different specifications of flat tube heat exchangers, enabling the equipment to adaptively install and process bent tubes of different sizes, significantly improving clamping flexibility and automation. Adaptive adjustment of the roller conveyor angle: In this invention, the roller conveyor is rotatably connected to the side frames, with its bottom contacting the outer side of the eccentric wheel. When the servo motor drives the bidirectional lead screw to move the side frames, the eccentric wheel synchronously adjusts the angle of the roller conveyor, ensuring that the bent tube remains at a suitable support angle during conveying. This prevents the pipe from shifting or jamming during conveying and forming, improving the stability of the conveying and the accuracy of the forming process. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the outer side structure of the side frame of this utility model; Figure 3 This is a schematic diagram of the inner structure of the side frame of this utility model; Figure 4 This is a schematic diagram of the outer side structure of the side frame of this utility model.

[0012] In the diagram: 1. Base; 2. Extension frame; 3. Pipe bending forming machine; 4. Middle seat; 5. Connecting frame; 6. L-shaped shaft seat; 7. Side frame; 8. Roller conveyor; 9. Servo motor; 10. Drive motor; 11. Slide groove; 12. Eccentric wheel; 13. Slider; 14. Bidirectional lead screw; 15. Rotary shaft. Detailed Implementation

[0013] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0014] like Figures 1-4 As shown, an embodiment of this utility model proposes a tube bending forming machine for a flat tube heat exchanger, including a base 1, the front end of which is fixedly connected to the tube bending forming machine 3 via an extension frame 2. The top of the base 1 has two symmetrical sliding grooves 11, which are slidably connected to four corresponding sliders 13. The four sliders 13 are fixedly installed on both sides of the bottom of the two corresponding side frames 7. A connecting frame 5 is fixedly installed on the bottom of one side of each of the two side frames 7. The two connecting frames 5 are threadedly connected to both sides of the outer wall of the bidirectional lead screw 14. The bidirectional lead screw 14 is inserted into the middle seat 4. The middle seat 4 is fixedly installed in the middle position on one side of the base 1. The two ends of the bidirectional lead screw 14 are rotatably connected to the inner wall of the corresponding L-shaped bearing 6. The two L-shaped bearings 6 are fixedly installed at one end of the two sides of the base 1. A guide tilting mechanism is provided on the inner side of each of the two side frames 7.

[0015] Specifically, a servo motor 9 is fixedly mounted on the outer side of one of the L-shaped bearing seats 6, and the output end of the servo motor 9 is fixedly connected to one end of the bidirectional lead screw 14.

[0016] Specifically, the guide tilt mechanism includes a roller conveyor 8 that is rotatably mounted on a rotating shaft 15 and a side frame 7. A drive motor 10 is fixedly mounted on one end of the outer side of each of the two side frames 7. The output end of the drive motor 10 passes through the corresponding side frame 7 and is fixedly connected to the eccentric position of the corresponding eccentric wheel 12.

[0017] Specifically, the outer sides of the two eccentric wheels 12 are in contact with the bottom of the corresponding roller conveyor 8.

[0018] Specifically, a switch panel is fixedly provided in the middle of one side of the base 1. A drive motor switch and a servo motor switch are fixedly provided on the surface of the switch panel. The drive motor 10 and the servo motor 9 are electrically connected to an external power supply through the drive motor switch and the servo motor switch, respectively.

[0019] Working principle: When it is necessary to bend and form flat tube heat exchangers of different specifications, first install this utility model on a flat workbench and connect the external power supply. The start and stop status of the servo motor and the drive motor are controlled by the servo motor switch and the drive motor switch on the switch panel, respectively.

[0020] When the operator starts the servo motor 9, the output shaft of the servo motor 9 begins to rotate. Its output shaft is fixedly connected to one end of the bidirectional lead screw 14, thereby driving the bidirectional lead screw 14 to rotate around its own axis. Since the left and right ends of the bidirectional lead screw 14 have threaded structures in opposite directions, and the two connecting brackets 5 are threadedly connected to both sides of the outer wall of the bidirectional lead screw 14, during the rotation of the bidirectional lead screw 14, the two connecting brackets 5 will move towards or away from each other along the axial direction of the bidirectional lead screw 14 under the action of the threads.

[0021] The movement of the connecting frame 5 will drive the side frame 7 fixedly connected above it to move synchronously. Since the bottom ends of both side frames 7 are slidably connected to the slide groove 11 on the base 1 through the slider 13, the side frames 7 can smoothly perform linear reciprocating motion along the slide groove 11. By controlling the forward and reverse rotation of the servo motor 9, the distance between the two side frames 7 can be precisely adjusted to accommodate flat tube heat exchanger bends of different widths, thereby realizing the rapid width adjustment and adaptive clamping function of the tube bending forming machine.

[0022] Once the spacing of the side frames 7 is adjusted to the appropriate position, the operator can place the tube components of the flat tube heat exchanger to be bent onto the two roller conveyors 8. At this time, in order to ensure that the tube components are subjected to uniform force and remain in a stable posture during conveying and bending, this utility model is equipped with a guide tilting mechanism to automatically adjust the tilt angle of the roller conveyors.

[0023] Specifically, the roller conveyor 8 is rotatably connected to the side frame 7 via a rotating shaft 15, and its bottom contacts the outer surface of the eccentric wheel 12. Each eccentric wheel 12 is driven by a drive motor 10 located on the outer side of the corresponding side frame 7 via a transmission shaft. When the drive motor 10 starts, its output shaft passes through the side frame 7 and is fixedly connected to the eccentric position of the eccentric wheel 12, thereby driving the eccentric wheel 12 to rotate synchronously when the drive motor 10 rotates.

[0024] Because there is an offset between the central axis and the eccentric position of the eccentric wheel 12, the highest and lowest points of its outer circular profile will change periodically when the eccentric wheel 12 rotates, thereby changing the contact height between the eccentric wheel and the bottom of the roller conveyor 8. When the high point of the eccentric wheel 12 supports the bottom of the roller conveyor, the overall angle of the roller conveyor tilts upward; when the eccentric wheel 12 rotates to the low point, the angle of the roller conveyor returns to horizontal. By controlling the rotation angle of the eccentric wheel 12, the angle of the roller conveyor 8 can be continuously adjusted, ensuring that the flat tube is always at the ideal support angle in the conveying path under different bending conditions.

[0025] Furthermore, since the two eccentric wheels 12 are symmetrically arranged on the left and right sides of the equipment and in contact with the bottom of the two roller conveyors 8, when the servo motor 9 drives the bidirectional lead screw 14 to rotate and drives the side frame 7 to move, the eccentric wheels 12 move synchronously with the side frame 7. This allows the synchronous angle adjustment of the roller conveyor to be maintained while the side frame spacing is adjusted, thus achieving mechanical linkage between the structures. In other words, when the side frame 7 moves inward due to the servo motor 9, the eccentric wheels 12 move with the side frame and change the inclination angle of the roller conveyor to adapt to the bending pipe guiding angle under narrower spacing; when the side frame 7 moves outward, the eccentric wheels 12 adjust the angle of the roller conveyor accordingly to keep the conveying surface stable and ensure that flat pipes of different specifications can be smoothly conveyed and formed.

[0026] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0027] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A tube bending forming machine for a flat tube heat exchanger, comprising a base (1), wherein the front end of the base (1) is fixedly connected to the tube bending forming machine (3) via an extension frame (2); Its features are: The top of the base (1) has two symmetrical sliding grooves (11). The two sliding grooves (11) are slidably connected to the four corresponding sliders (13). The four sliders (13) are respectively fixed on both sides of the bottom of the two corresponding side frames (7). The bottom of one side of each of the two side frames (7) is fixedly provided with a connecting frame (5). The two connecting frames (5) are threadedly connected to both sides of the outer wall of the bidirectional screw (14). The bidirectional screw (14) is inserted into the middle seat (4). The middle seat (4) is fixedly provided in the middle position on one side of the base (1). The two ends of the bidirectional screw (14) are rotatably connected to the inner wall of the corresponding L-shaped shaft seat (6). The two L-shaped shaft seats (6) are respectively fixedly provided at one end of the two sides of the base (1). The inner side of each of the two side frames (7) is provided with a guide tilting mechanism.

2. The tube bending forming machine for a flat tube heat exchanger according to claim 1, characterized in that: One of the L-shaped bearings (6) is fixedly provided with a servo motor (9) on its outer side, and the output end of the servo motor (9) is fixedly connected to one end of the bidirectional lead screw (14).

3. The tube bending forming machine for a flat tube heat exchanger according to claim 1, characterized in that: The guide tilt mechanism includes a roller conveyor (8) that is rotatably mounted on a rotating shaft (15) and a side frame (7). A drive motor (10) is fixedly mounted on one end of the outer side of each of the two side frames (7). The output end of the drive motor (10) passes through the corresponding side frame (7) and is fixedly connected to the eccentric position of the corresponding eccentric wheel (12).

4. A tube bending forming machine for a flat tube heat exchanger according to claim 3, characterized in that: The outer sides of the two eccentric wheels (12) are in contact with the bottom of the corresponding roller conveyor (8).

5. A tube bending forming machine for a flat tube heat exchanger according to claim 1, characterized in that: A switch panel is fixedly provided in the middle of one side of the base (1). A drive motor switch and a servo motor switch are fixedly provided on the surface of the switch panel. The drive motor (10) and the servo motor (9) are electrically connected to an external power supply through the drive motor switch and the servo motor switch, respectively.

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