A tube bending device for heat exchanger copper tubes

Abstract

This utility model discloses a bending device for copper tubes in heat exchangers, belonging to the technical field of bending equipment. It includes a frame, with a base fixed to one side of the frame. Support bearings are fixed to the top and bottom of the base, and a deflection shaft is sleeved within each support bearing. This bending device for copper tubes in heat exchangers locks the bending wheel in place by connecting the through hole in the middle of the bending wheel to the top of the deflection shaft. When the bending wheel stops moving downwards, the spring force supports the pressure ring. The pressure block, through two hinged rods, drives two locking blocks away from each other and into the locking groove, thus locking the bending wheel. Furthermore, the first and second clamping dies can be removed and replaced from the L-shaped groove and the second slide by loosening the bolts. Therefore, the modular design allows for independent replacement of the bending wheel, the first clamping die, and the second clamping die, eliminating the need for the traditional integrated bending device. This makes operation convenient and reduces changeover time, thereby improving bending efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipe bending equipment, specifically a pipe bending device for heat exchanger copper tubes. Background Technology

[0002] In the fields of HVAC, refrigeration equipment, and industrial heat exchange systems, heat exchangers, as the core components for energy transfer, require straight copper tubes to be processed into bent tube structures with specific curvatures and angles.

[0003] Existing pipe bending equipment is mostly designed for single-specification adaptation. If it is necessary to process copper pipes of different diameters or curvatures, the entire mold assembly with an integrated fixed structure needs to be replaced, and the coaxiality of the mold center and the copper pipe axis needs to be recalibrated. This increases the workload and the debugging time, which greatly reduces the pipe bending efficiency. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a tube bending device for heat exchanger copper tubes, which solves the problem that most tube bending equipment is designed for single specification adaptation. If it is necessary to process copper tubes of different diameters or curvatures, it is necessary to replace the entire mold assembly with an integrated fixed structure and then recalibrate the coaxiality between the mold center and the copper tube axis, which increases the workload and the debugging time.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tube bending device for heat exchanger copper tubes, comprising a frame, a base fixed to one side of the frame, support bearings fixed to the top and bottom of the base, a deflection shaft sleeved within the two support bearings, a motor fixed to the bottom of the deflection shaft, the motor installed inside the frame, a vertical plate fixed to the portion of the deflection shaft passing through the two support bearings, a guide assembly provided on one side of the vertical plate, the guide assembly fixed to the frame, a clamping assembly fixed to the vertical plate, a tube bending wheel provided at the front end of the clamping assembly, an L-shaped groove opened on the side of the tube bending wheel near the clamping assembly, a second clamping mold installed in the L-shaped groove, and so on. The deflection shaft has a cavity at its upper part, and a locking assembly at its lower part. The locking assembly includes a pressure block, a vertical rod fixed to the top of the pressure block, the top of the vertical rod penetrating the cavity and extending to the top of the deflection shaft, a pressure ring fixed to the outside of the vertical rod, and a fixing ring below the pressure ring. The fixing ring is fixed in the cavity, and a spring is fixedly connected between the pressure ring and the fixing ring. Hinges are rotatably connected to both sides of the pressure block via pins, and a locking block is rotatably connected to the other end of the hinge rod via a pin. A through hole is opened in the middle of the bending wheel and it is sleeved on the outside of the deflection shaft. A slot is opened on both sides of the inner wall of the through hole, and the locking block is engaged in the slot.

[0006] As a further embodiment of this utility model: the guide assembly includes a first electric push rod, the first electric push rod is fixed on the frame, the output end of the first electric push rod is fixed with a push plate, and the bottom sides of the push plate are respectively fixed with first slide blocks, the first slide blocks slide in a track set above the frame.

[0007] As a further embodiment of this utility model: a baffle is fixed in the push plate, the baffle is U-shaped and has several guide wheels installed at equal intervals inside.

[0008] As a further embodiment of this utility model: the clamping assembly includes a second electric push rod, the second electric push rod is fixed on the upright plate, the output end of the second electric push rod is fixed with a second slide block, the second slide block slides in a track provided on the upright plate, and a first clamping mold is fixed in front of the second slide block.

[0009] As a further embodiment of this utility model: the opposite surfaces of the first clamping mold and the second clamping mold overlap, and bolts are respectively installed at the four corners of one side of the first clamping mold and the second clamping mold. The first clamping mold and the second clamping mold are respectively fixed to the bending wheel and the second slide by four bolts.

[0010] As a further embodiment of this utility model: the top of the card block is flat, the side of the card block away from the hinge rod is inclined, and the recesses on both sides of the inner wall of the perforation slide outside the protrusions provided outside the deflection shaft.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This heat exchanger copper tube bending device, when changing bending wheels of different diameters or curvatures, connects the through hole in the middle of the bending wheel to the top of the deflection shaft. When the bottom of the bending wheel contacts the inclined part on one side of the clamping block, it will squeeze the two clamping blocks, allowing the two clamping blocks to move closer to each other and retract into the deflection shaft. When the bending wheel stops moving down, the spring force supports the pressure ring, causing the pressure ring to move the pressure block upward through the upright. The pressure block then moves the two clamping blocks away from each other through the two hinge rods and locks them into the clamping groove, thus locking the bending wheel. Moreover, the first clamping die and the second clamping die can be removed from the L-shaped groove and the second slide for replacement by loosening the bolts. Therefore, the bending wheel, the first clamping die and the second clamping die can be replaced independently through modular design, abandoning the traditional integrated design of the bending device. It is convenient to operate and has a short changeover time, thereby improving the bending efficiency. 2. The copper tube bending device for this heat exchanger can drive the copper tube to bend through the first clamping die and the second clamping die. At the same time, the horizontal part of the copper tube is supported by the guide wheel and slides on its outside, reducing the friction generated during the bending process and preventing wear on the outside of the copper tube due to excessive friction, thus ensuring the quality of the bending. Moreover, the V-shaped arc surface inside the guide wheel can adapt to the guiding work of copper tubes of different specifications. The device controls the retraction of the first electric push rod and the second electric push rod to move the guide wheel away from the copper tube, so as to remove it and reload the copper tube to be processed, thereby improving the automation level of the bending device. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the guide component of this utility model; Figure 3 This is a schematic diagram of the structure of the clamping assembly of this utility model; Figure 4 This is a schematic diagram of the locking component of this utility model; Figure 5 This is a schematic diagram of the structure of the present invention, showing the separation of the bending wheel and the second clamping mold; In the diagram: 1. Frame; 2. Base; 3. Deflection shaft; 4. Support bearing; 5. Motor; 6. Vertical plate; 7. Guide assembly; 701. First electric push rod; 702. Push plate; 703. First slide; 704. Stop; 705. Guide wheel; 8. Clamping assembly; 801. Second electric push rod; 802. Second slide; 803. First clamping mold; 9. Bending wheel; 10. Second clamping mold; 11. Bolt; 12. L-shaped groove; 13. Cavity; 14. Locking assembly; 141. Pressure block; 142. Vertical rod; 143. Pressure ring; 144. Fixing ring; 145. Spring; 146. Hinge rod; 147. Locking block; 15. Locking groove; 16. Perforation. Detailed Implementation

[0013] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0014] like Figure 1-5As shown, this utility model provides a technical solution: a tube bending device for heat exchanger copper tubes, including a frame 1, a base 2 fixed on one side of the frame 1, support bearings 4 fixed at the top and bottom of the base 2 respectively, a deflection shaft 3 sleeved inside the two support bearings 4, a motor 5 fixed at the bottom of the deflection shaft 3, the motor 5 installed inside the frame 1, a vertical plate 6 fixed to the part of the deflection shaft 3 passing through the two support bearings 4, a guide assembly 7 provided on one side of the vertical plate 6, the guide assembly 7 fixed on the frame 1, the guide assembly 7 including a first electric push rod 701, the first electric push rod 701 fixed on the frame 1, the first electric... A push plate 702 is fixed to the output end of the push rod 701. First slide blocks 703 are fixed to both sides of the bottom of the push plate 702. The first slide blocks 703 slide in the track set above the frame 1. A stop 704 is fixed in the push plate 702. The stop 704 is U-shaped and has several guide wheels 705 installed at equal intervals inside. The horizontal part of the copper tube is supported by the guide wheels 705 and slides on its outside, reducing the friction generated by the copper tube during bending and preventing wear on the outside of the copper tube due to excessive friction. Moreover, the V-shaped arc surface inside the guide wheel 705 can adapt to the guiding work of copper tubes of different specifications.

[0015] A clamping assembly 8 is fixed on the upright plate 6. The front end of the clamping assembly 8 is provided with a bending wheel 9. The clamping assembly 8 includes a second electric push rod 801, which is fixed on the upright plate 6. A second slide block 802 is fixed at the output end of the second electric push rod 801. The second slide block 802 slides in the track provided on the upright plate 6. A first clamping mold 803 is fixed in front of the second slide block 802. The copper tube can be clamped by the first clamping mold 803 and the second clamping mold 10. The control motor 5 works to drive the deflection shaft 3 to rotate. The top end of the deflection shaft 3 drives the second clamping mold 10 and the upright plate 6 to deflect through the bending wheel 9, thereby improving the stability of the copper tube bending driven by the first clamping mold 803 and the second clamping mold 10. An L-shaped groove 12 is provided on the side of the bending wheel 9 near the clamping assembly 8. A second clamping mold 10 is installed in the L-shaped groove 12. The opposite surfaces of the first clamping mold 803 and the second clamping mold 10 overlap, and bolts 11 are installed at the four corners of one side of the first clamping mold 803 and the second clamping mold 10. The first clamping mold 803 and the second clamping mold 10 are fixed to the bending wheel 9 and the second slide block 802 by four bolts 11. The first clamping mold 803 and the second clamping mold 10 can be removed from the L-shaped groove 12 and the second slide block 802 by loosening the bolts 11. The independent design of the first clamping mold 803 and the second clamping mold 10 facilitates the changeover work. A cavity 13 is located above the interior of the deflection shaft 3. A locking assembly 14 is located below the interior of the cavity 13. The locking assembly 14 includes a pressure block 141. A vertical rod 142 is fixed to the top of the pressure block 141. The top end of the vertical rod 142 passes through the cavity 13 and extends to the top of the deflection shaft 3. A pressure ring 143 is fixed to the outside of the vertical rod 142. A fixing ring 144 is located below the pressure ring 143 and is fixed inside the cavity 13. A spring 145 is fixedly connected between the pressure ring 143 and the fixing ring 144. Hinges 146 are rotatably connected to both sides of the pressure block 141 via pins. The other end of the hinge rod 146 passes through... A locking block 147 is rotatably connected via a pin shaft. A through hole 16 is provided in the middle of the bending wheel 9 and is sleeved on the outside of the deflection shaft 3. A slot 15 is provided on both sides of the inner wall of the through hole 16. The locking block 147 is locked in the slot 15. By pressing down the upright rod 142, it drives the pressure ring 143 and the pressure block 141 to move downward. During the downward movement of the pressure block 141, it will pull the hinge rods 146 on both sides to deflect, so that the tops of the two hinge rods 146 approach each other and drive the two locking blocks 147 to disengage from the slot 15 inside the through hole 16. This can release the locking state between the deflection shaft 3 and the bending wheel 9, making it convenient to quickly remove the bending wheel 9. The top of the locking block 147 is flat, and the side of the locking block 147 away from the hinge rod 146 is sloping. The recesses on both sides of the inner wall of the through hole 16 slide on the protrusions set outside the deflection shaft 3. The spring force of the spring 145 supports the pressure ring 143, so that the pressure ring 143 drives the pressure block 141 to move upward through the upright rod 142. The pressure block 141 then drives the two locking blocks 147 to move away from each other through the two hinge rods 146 and locks into the locking groove 15, which facilitates locking the bending wheel 9. Because the recesses on both sides of the inner wall of the perforation 16 slide outside the protrusions set outside the deflection shaft 3, the protrusions play a role in limiting the bending wheel 9, preventing the bending wheel 9 from rotating and affecting the bending effect on the copper tube.

[0016] The working principle of this utility model is as follows: During the bending process of the heat exchanger copper tubes, the copper tubes are passed through the baffle 704 so that they contact the multiple guide wheels 705 inside, and the ends of the copper tubes extend to the first clamping die 803 and the second clamping die 10. Simultaneously, the first electric push rod 701 and the second electric push rod 801 are extended to push the push plate 702 and the second slide block 802 to move, so that the push plate 702 drives the guide wheels 705 to press against the copper tube through the baffle 704. At the same time, the second slide block 802 drives the first clamping die 803 to squeeze the copper tube. The copper tube can be clamped by the first clamping mold 803 and the second clamping mold 10. The motor 5 is controlled to drive the deflection shaft 3 to rotate. The top of the deflection shaft 3 drives the second clamping mold 10 and the vertical plate 6 to deflect through the bending wheel 9. Then the first clamping mold 803 and the second clamping mold 10 can drive the copper tube to bend. At the same time, the horizontal part of the copper tube is supported by the guide wheel 705 and slides on its outside, reducing the friction generated by the copper tube during the bending process and preventing wear on the outside of the copper tube due to excessive friction. After completing the pipe bending operation, motor 5 reverses and drives deflection shaft 3 to rotate. Deflection shaft 3 then drives vertical plate 6 and upper bending wheel 9 back to their initial positions. Next, the first electric push rod 701 and the second electric push rod 801 are controlled to retract, causing guide wheel 705 to move away from the copper pipe, making it easier to remove and reload the copper pipe to be processed. If copper pipes of different diameters or curvatures need to be processed, pressing down vertical rod 142 causes pressure ring 143 and pressure block 141 to move downwards. During the downward movement of pressure block 141, it pulls the hinge rods 146 on both sides to deflect, causing the tops of the two hinge rods 146 to approach each other and drive the two locking blocks 147 to disengage from the locking grooves 15 inside the through hole 16, thus releasing the locking state between deflection shaft 3 and bending wheel 9. Next, the bending wheel 9 is lifted to disengage from the top of deflection shaft 3. When changing to bending wheel 9 with different diameters or curvatures, the through hole in the middle of the bending wheel 9 is... The hole 16 is fitted onto the top of the deflection shaft 3. The recesses on both sides of the inner wall of the hole 16 slide against the protrusions on the outside of the deflection shaft 3, allowing the protrusions to limit the bending wheel 9 and prevent the bending wheel 9 from rotating and affecting the bending effect on the copper tube. When the bottom of the bending wheel 9 contacts the inclined part on one side of the locking block 147, it will press the two locking blocks 147, allowing the two locking blocks 147 to move closer to each other and retract into the deflection shaft 3. When the bending wheel 9 stops moving downwards, it is then... The elastic force of the spring 145 supports the pressure ring 143, causing the pressure ring 143 to move the pressure block 141 upward through the upright rod 142. The pressure block 141 then moves the two locking blocks 147 away from each other through the two hinge rods 146 and locks them into the slot 15, thereby locking the bending wheel 9. In addition, the first clamping mold 803 and the second clamping mold 10 can be removed from the L-shaped groove 12 and the second slide block 802 for replacement by loosening the bolt 11.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A tube bending device for heat exchanger copper tubes, comprising a frame (1), characterized in that: A base (2) is fixed on one side of the frame (1). Support bearings (4) are fixed at the top and bottom of the base (2). A deflection shaft (3) is sleeved inside the two support bearings (4). A motor (5) is fixed at the bottom of the deflection shaft (3). The motor (5) is installed inside the frame (1). A vertical plate (6) is fixed to the part of the deflection shaft (3) that passes through the two support bearings (4). A guide assembly (7) is provided on one side of the vertical plate (6). The guide assembly (7) is fixed on the frame (1). A clamping assembly (8) is fixed on the vertical plate (6). A bending wheel (9) is provided at the front end of the clamping assembly (8). An L-shaped groove (12) is opened on the side of the bending wheel (9) near the clamping assembly (8). A second clamping mold (10) is installed in the L-shaped groove (12). A cavity (13) is provided above the inside of the deflection shaft (3). A locking assembly (14) is provided below the inside of the cavity (13). The fixing component (14) includes a pressure block (141), the top of which is fixed with a vertical rod (142). The top end of the vertical rod (142) passes through the cavity (13) and extends above the deflection shaft (3). A pressure ring (143) is fixed to the outside of the vertical rod (142). A fixing ring (144) is provided below the pressure ring (143). The fixing ring (144) is fixed inside the cavity (13). The pressure ring (143) and the fixing ring (144) are connected. 4) A spring (145) is fixedly connected between them. The two sides of the pressure block (141) are respectively connected to the hinge rod (146) by a pin. The other end of the hinge rod (146) is connected to the locking block (147) by a pin. The middle part of the bending wheel (9) is provided with a through hole (16) and is sleeved on the outside of the deflection shaft (3). The two sides of the inner wall of the through hole (16) are respectively provided with a slot (15). The locking block (147) is locked in the slot (15).

2. The heat exchanger copper tube bending device according to claim 1, characterized in that: The guide assembly (7) includes a first electric push rod (701), which is fixed on the frame (1). The output end of the first electric push rod (701) is fixed with a push plate (702). The bottom sides of the push plate (702) are respectively fixed with first slide blocks (703), which slide in a track set above the frame (1).

3. The heat exchanger copper tube bending device according to claim 2, characterized in that: The push plate (702) is fixed with a baffle (704), which is U-shaped and has several guide wheels (705) installed at equal intervals inside.

4. The heat exchanger copper tube bending device according to claim 1, characterized in that: The clamping assembly (8) includes a second electric push rod (801), which is fixed on the upright plate (6). The output end of the second electric push rod (801) is fixed with a second slide block (802). The second slide block (802) slides in a track set on the upright plate (6). A first clamping mold (803) is fixed in front of the second slide block (802).

5. A tube bending device for heat exchanger copper tubes according to claim 4, characterized in that: The opposite surfaces of the first clamping mold (803) and the second clamping mold (10) overlap, and bolts (11) are installed at the four corners of one side of the first clamping mold (803) and the second clamping mold (10). The first clamping mold (803) and the second clamping mold (10) are fixed to the bending wheel (9) and the second slide (802) by four bolts (11).

6. The heat exchanger copper tube bending device according to claim 1, characterized in that: The top of the card block (147) is flat, and the side of the card block (147) away from the hinge rod (146) is inclined. The recesses on both sides of the inner wall of the perforation (16) slide outside the protrusions provided outside the deflection shaft (3).

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