Machining device for spiral finned tube

Abstract

The utility model provides a spiral finned tube machining device and belongs to the technical field of spiral finned tubes. The problem that an existing spiral finned tube is low in welding precision is solved. The spiral finned tube machining device comprises a rack, a driving structure, a feeding structure, a forming structure and a welding gun, the driving structure is arranged on the rack and used for driving a steel tube to move and rotate, the feeding structure is used for feeding fins, the forming structure is provided with a welding hole allowing the steel tube to penetrate through and a guide hole allowing the fins to penetrate through, and the welding hole is communicated with the guide hole. The welding gun is arranged opposite to the welding hole, a pair of rotatable first guide wheels is arranged in the forming structure, an adjusting rod is arranged on the rack, a rotatable second guide wheel is arranged on the adjusting rod, the pair of first guide wheels and the pair of second guide wheels are arranged in an isosceles triangle shape, and the pair of first guide wheels and the pair of second guide wheels are both partially located in the welding hole. The machining device for the spiral finned tube has the advantages that the welding precision of the fins is improved, and the welding firmness degree of the fins and the steel tube is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spiral finned tubes and relates to a processing device for spiral finned tubes. Background Art

[0002] A spiral finned tube is a heat exchange tube with spiral fins fixedly connected to the outer surface of the tube, and is widely used in various heat exchange devices, such as boilers, air conditioning systems, refrigeration equipment, and heat exchangers in chemical processes. The main purpose of the spiral finned tube is to increase the outer surface area of the tube, thereby improving the heat transfer efficiency.

[0003] Existing spiral finned tube processing devices, for example, Chinese patent literature discloses a numerical control spiral finned tube laser welding forming device and its welding forming method [Patent No.: 201410467460.5; Application Publication No.: CN104325219B], which includes a frame, a linear walking trolley, a rack, a rotating device, a steel pipe chuck, a laser, and a steel strip conveying device. The rack is horizontally arranged on the frame, the linear walking trolley is movably arranged on the frame and meshes with the rack, the rotating device is fixed on the linear walking trolley, the steel pipe chuck is arranged on the output shaft of the rotating device, and the axis of the steel pipe clamped by the steel pipe chuck is parallel to the moving track of the linear walking trolley. The steel strip conveying device is arranged on the frame at a position corresponding to one side of the steel pipe chuck and is provided with a mating welding hole for the steel pipe to pass through. A steel strip forming fin die is arranged on the mating welding hole, and the laser is arranged at a position on one side of the steel strip conveying device, and the laser beam emitted by the laser is directed towards the steel strip forming fin die.

[0004] For the spiral finned tube laser welding forming device with this structure, the rotating device drives the steel pipe to rotate, so that the fins are welded spirally on the outer peripheral wall of the steel pipe. However, for the forming device with this structure, the steel pipe passes through the steel strip forming fin die, there is a gap between the steel pipe and the die, and there is a problem of radial runout of the steel pipe, so that the fins cannot be accurately welded on the steel pipe, resulting in the problem of loose welding of the fins and reducing the fixing strength between the fins and the steel pipe. Summary of the Invention

[0005] The purpose of the utility model is to provide a processing device for spiral finned tubes to solve the above problems existing in the prior art, and the technical problem to be solved is how to improve the welding accuracy of the fins and the welding strength between the fins and the steel pipe.

[0006] The object of the present utility model can be achieved by the following technical solutions: a processing device for spiral finned tubes, comprising a frame and a driving structure, a feeding structure, a forming structure and a welding torch arranged on the frame. The driving structure is used to drive the steel pipe to move and rotate. The forming structure has a welding hole for the steel pipe to pass through and a guiding hole for the fins to pass through. The welding hole is communicated with the guiding hole. The welding torch is arranged facing the welding hole. It is characterized in that a pair of rotatable first guiding wheels are arranged in the forming structure, an adjusting rod is arranged on the frame, and a rotatable second guiding wheel is arranged on the adjusting rod. A pair of the first guiding wheels and the second guiding wheel are arranged in an isosceles triangle, and a pair of the first guiding wheels and the second guiding wheel are both partially located in the welding hole.

[0007] During operation, the driving structure drives the steel pipe to rotate and move along the X-axis, so that the steel pipe passes through the welding hole at a set speed. The fins enter the welding hole through the feeding structure and the guiding hole, and the welding torch makes the fins be spirally welded and fixed on the steel pipe. A pair of the first guiding wheels and the second guiding wheel form a clamping space. The steel pipe passes through the clamping space. A pair of the first guiding wheels and the second guiding wheel are arranged in an isosceles triangle, so that the steel pipe is in contact with a pair of the first guiding wheels and the second guiding wheel, and the problem of radial runout of the steel pipe is avoided, so that the fins are accurately welded and fixed on the steel pipe, the welding precision of the fins is improved, and the welding firmness between the fins and the steel pipe is improved. A pair of the first guiding wheels and the second guiding wheel are both rotatable and cooperate with the rotation of the steel pipe to reduce friction and do not hinder the rotation of the steel pipe.

[0008] In the above-mentioned processing device for spiral finned tubes, the central axes of a pair of the first guiding wheels and the second guiding wheel are parallel to each other. A pair of the first guiding wheels are located at the same height in the vertical direction, and the second guiding wheel is located directly below the middle of a pair of the first guiding wheels. A pair of the first guiding wheels and the second guiding wheel are arranged in an equilateral triangle. With this structure, a pair of the first guiding wheels and the second guiding wheel can better support the steel pipe, avoid the problem of radial runout of the steel pipe, make the fins be accurately welded and fixed on the steel pipe, improve the welding precision of the fins, and improve the welding firmness between the fins and the steel pipe.

[0009] In the above-mentioned processing device for spiral finned tubes, the adjusting rod is in threaded connection with the frame, and the second guiding wheel is arranged at the top of the adjusting rod. With this structure, the height of the second guiding wheel can be adjusted, so that a pair of the first guiding wheels and the second guiding wheel can better support the steel pipe, avoid the problem of radial runout of the steel pipe, and at the same time, the processing device can position steel pipes with different outer diameters, improving the versatility of the processing device.

[0010] In the above-mentioned processing device for spiral finned tubes, the forming structure includes a first forming plate, a second forming plate, a stop bar, a pressing bar, and a circular pressing piece. A pair of the first guide wheels are rotatably embedded in the first forming plate, and the pair of first guide wheels are axially positioned by embedding and fixing the stop bar in the first forming plate. The first forming plate and the second forming plate are fixedly connected in a fitting manner. The guiding hole is located between the stop bar and the second forming plate. The pressing piece is rotatably arranged at the bottom of the pressing bar. The bottom of the pressing bar penetrates and is positioned between the first forming plate and the second forming plate, and a part of the pressing piece is located above the guiding hole. With this structure, the first guide wheels are stably installed. The fin can be pressed by the pressing bar and the pressing piece, so that the fin is better connected to the steel pipe, improving the welding precision of the fin. The pressing piece is circular and can rotate, which will not hinder the movement of the fin while pressing the fin. The height of the pressing bar can be adjusted, that is, the height of the pressing piece can also be adjusted, enabling this processing device to weld fins with different widths on the steel pipe and improving the versatility.

[0011] In the above-mentioned processing device for spiral finned tubes, one side of the second forming plate facing the first forming plate has an adjustment groove, and an adjustment strip is detachably positioned in the adjustment groove. The adjustment strip is arranged opposite to the stop bar, and the guiding hole is located between the stop bar and the adjustment strip. With this structure, different adjustment strips can be replaced according to the thickness of the fin, ensuring smooth movement of the fin without jamming problems.

[0012] In the above-mentioned processing device for spiral finned tubes, the forming structure further includes a third forming plate fixedly connected below the first forming plate. The third forming plate has an adjustment plane, and an adjustment piece is also provided on the third forming plate. There is a gap for the fin to pass through between the adjustment plane and the adjustment piece. The adjustment plane and the adjustment piece cooperate to correct the position of the fin and improve the welding precision of the fin.

[0013] In the above-mentioned processing device for spiral finned tubes, the third forming plate is located obliquely below the welding hole, and an adjustment block is movably positioned in the third forming plate. The adjustment piece is fixedly connected to the adjustment block. With this structure, the position of the adjustment piece can be adjusted, which can adapt to fins with different thicknesses and can better correct the position of the fin.

[0014] In the above-mentioned processing device for spiral finned tubes, the driving structure includes a driver, a chuck for clamping a steel pipe, a first positioning post, a second positioning post, and a driving rod having an external thread and used for detachably fixing to the steel pipe. The driver can drive the chuck to rotate. The first positioning post has a semi-circular first thread section, and the second positioning post has a semi-circular second thread section. The first positioning post and the second positioning post can move and position relatively. The driving rod can be embedded into the first thread section and the second thread section, and the driving rod can rotate relative to the first positioning post and the second positioning post. The steel pipe passes through the chuck. The steel pipe is in close contact with the jaws of the chuck but not stuck. The rotation of the chuck can drive the rotation of the steel pipe. The driving rod is detachably fixed to the tail end of the steel pipe. After the first positioning post and the second positioning post move outward and then inward, the driving rod can pass through the first thread section and the second thread section and be threadedly connected. Through the threaded connection of the driving rod, the clamping force of the jaws on the steel pipe can be overcome to push the steel pipe to move along the X-axis, thereby driving the rotation and movement of the steel pipe. The first thread section and the second thread section are divided into two halves, which makes it convenient to place the driving rod. The first positioning post and the second positioning post can be replaced as a whole, that is, the pitch of the first thread section and the second thread section can be changed, so that the moving speed of the steel pipe can be changed, the spacing of the fins can be changed, and fins with different spacings can be processed, improving the versatility.

[0015] As another case, in the above-mentioned processing device for spiral finned tubes, the driving structure includes a driver, a chuck for clamping a steel pipe, a third positioning post, and a driving rod having an external thread and used for detachably fixing to the steel pipe. The driver can drive the chuck to rotate. The third positioning post has a threaded hole, and the driving rod passes through the threaded hole. The driving rod can rotate relative to the third positioning post.

[0016] In the above-mentioned processing device for spiral finned tubes, the feeding structure includes a feeding rack fixed on the frame and several pairs of feeding posts fixed on the feeding rack. A plurality of bearings are sleeved on each feeding post, and there is a gap for the fins to pass through between adjacent two groups of the bearings.

[0017] Compared with the prior art, the processing device for spiral finned tubes provided by the present utility model has the following advantages:

[0018] 1. The processing device supports the steel pipe through a pair of first guide wheels and second guide wheels, so that there is no problem of radial runout of the steel pipe, enabling the fins to be accurately welded and fixed on the steel pipe, improving the welding accuracy of the fins and the welding firmness between the fins and the steel pipe.

[0019] 2. The processing device overcomes the clamping force of the chuck on the steel pipe by the threaded rotation of the driving rod to push the steel pipe to move, so that there is no problem of radial runout of the steel pipe, improving the stability of the steel pipe. Brief Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of this processing device.

[0021] Figure 2 is the overall structural schematic diagram of the forming structure of this processing device.

[0022] Figure 3 is the structural schematic diagram of the steel pipe positioning of this processing device.

[0023] Figure 4 is the exploded view of the forming structure of this processing device.

[0024] Figure 5 is the structural schematic diagram of the driving rod, the first positioning column and the second positioning column of this processing device.

[0025] In the figure, 1, frame; 2, steel pipe; 3, driving structure; 31, driver; 32, chuck; 33, first positioning column; 34, second positioning column; 35, driving rod; 36, first threaded section; 37, second threaded section; 5, feeding structure; 51, feeding rack; 52, feeding column; 53, bearing; 6, forming structure; 61, welding hole; 62, guiding hole; 63, first forming plate; 64, second forming plate; 65, bar; 66, pressing strip; 67, pressing piece; 68, adjusting groove; 69, adjusting bar; 610, third forming plate; 611, adjusting plane; 612, adjusting piece; 613, adjusting block; 7, welding torch; 8, first guiding wheel; 9, adjusting rod; 10, second guiding wheel. Detailed Description of the Preferred Embodiments

[0026] The following are specific embodiments of the present invention and, in conjunction with the accompanying drawings, further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0027] Embodiment 1

[0028] As Figure 1 shown, the processing device for spiral finned tubes includes a frame 1, a driving structure 3, a feeding structure 5, a forming structure 6, a welding torch 7, a first guiding wheel 8, an adjusting rod 9 and a second guiding wheel 10.

[0029] As Figure 2 , Figure 3 , Figure 4As shown, the forming structure 6 includes a first forming plate 63, a second forming plate 64, a stop bar 65, a pressing bar 66, a circular pressing piece 67, an adjusting bar 69, and a third forming plate 610. A pair of first guide wheels 8 are rotatably embedded in the first forming plate 63. The pair of first guide wheels 8 are axially positioned by being fixedly embedded in the first forming plate 63 through the stop bar 65. One side of the second forming plate 64 facing the first forming plate 63 has an adjusting groove 68. The adjusting bar 69 is detachably positioned in the adjusting groove 68. The adjusting bar 69 is arranged opposite to the stop bar 65. The first forming plate 63 and the second forming plate 64 are bonded and fixed together. The guide hole 62 is located between the stop bar 65 and the adjusting bar 69. The pressing piece 67 is rotatably arranged at the bottom of the pressing bar 66. The bottom of the pressing bar 66 is inserted and positioned between the first forming plate 63 and the second forming plate 64. A part of the pressing piece 67 is located at the top of the guide hole 62.

[0030] The third forming plate 610 is fixedly connected below the first forming plate 63. The third forming plate 610 is located obliquely below the welding hole 61. The third forming plate 610 has an adjusting plane 611. An adjusting block 613 is movably positioned in the third forming plate 610. An adjusting piece 612 is fixedly connected to the adjusting block 613. There is a gap for the fin to pass through between the adjusting plane 611 and the adjusting piece 612.

[0031] The forming structure 6 has a welding hole 61 for the steel pipe 2 to pass through. The welding hole 61 is communicated with the guide hole 62. The welding torch 7 is arranged facing the welding hole 61. The pair of first guide wheels 8 are located at the same height in the vertical direction. An adjusting rod 9 is provided on the frame 1. The adjusting rod 9 is threadedly connected to the frame 1. The second guide wheel 10 is rotatably arranged at the top of the adjusting rod 9. The second guide wheel 10 is located directly below the middle of the pair of first guide wheels 8. The pair of first guide wheels 8 and the second guide wheel 10 are arranged in an equilateral triangle. The central axes of the pair of first guide wheels 8 and the second guide wheel 10 are parallel to each other. The pair of first guide wheels 8 and the second guide wheel 10 are both partially located in the welding hole 61.

[0032] The driving structure 3 is arranged on the frame 1. The driving structure 3 is used to drive the steel pipe 2 to move and rotate. Specifically, the driving structure 3 includes a driver 31, a chuck 32 for clamping the steel pipe 2, a first positioning column 33, a second positioning column 34, and a driving rod 35 with an external thread and used for detachably fixing to the steel pipe 2. The driver 31 can drive the chuck 32 to rotate. As Figure 5 shown, the first positioning column 33 has a semi-circular first thread section 36. The second positioning column 34 has a semi-circular second thread section 37. The first positioning column 33 and the second positioning column 34 can be relatively moved and positioned. The driving rod 35 can be embedded into the first thread section 36 and the second thread section 37. The driving rod 35 can rotate relative to the first positioning column 33 and the second positioning column 34. In this embodiment, the driver 31 is a motor.

[0033] The loading structure 5 is arranged on the frame 1 and is used for loading fins. In this embodiment, the loading structure 5 includes a loading rack 51 fixed on the frame 1 and four pairs of loading columns 52 fixedly connected to the loading rack 51. Four bearings 53 are sleeved on each loading column 52, and there is a gap for the fins to pass through between adjacent groups of bearings 53. In actual production, the number of loading columns 52 can be three pairs or five pairs, and three or five bearings 53 are sleeved on each loading column 52.

[0034] During operation, the steel pipe 2 is passed through the chuck 32 and through the welding hole 61. The jaws of the chuck 32 clamp the steel pipe 2, and the first guide wheel 8 and the second guide wheel 10 are abutted against the steel pipe 2. The first positioning post 33 and the second positioning post 34 move outwards, and one end of the driving rod 35 is fixedly connected to the tail end of the steel pipe 2, so that the driving rod 35 is embedded between the first positioning post 33 and the second positioning post 34. Then, the first positioning post 33 and the second positioning post 34 move inwards, so that the driving rod 35 is threadedly connected to the first threaded section 36 and the second threaded section 37. The fins pass through the gap between adjacent groups of bearings 53 and through the guide hole 62 and extend into the welding hole 61. The position of the pressing strip 66 is adjusted, and the fins are pressed by the pressing piece 67. The driving structure 3 drives the steel pipe 2 to rotate and move, and the welding torch 7 welds the fins and the steel pipe 2. The rotation of the steel pipe 2 pulls the fins to move, and the fins are adjusted by passing through the gap between the adjusting plane 611 and the adjusting piece 612. The driving structure 3 and the welding torch 7 continue to work to complete the welding of the fins and the steel pipe 2.

[0035] Embodiment 2

[0036] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that in this embodiment, the driving structure 3 includes a driver 31, a chuck 32 for clamping the steel pipe 2, a third positioning post, and a driving rod 35 having an external thread and used for detachably fixing to the steel pipe 2. The driver 31 can drive the chuck 32 to rotate. The third positioning post has a threaded hole, and the driving rod 35 passes through the threaded hole, and the driving rod 35 can rotate relative to the third positioning post.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0038] Although terms such as frame 1, steel pipe 2, driving structure 3, driver 31, chuck 32, first positioning post 33, second positioning post 34, driving rod 35, first threaded section 36, second threaded section 37, loading structure 5, loading rack 51, loading post 52, bearing 53, forming structure 6, welding hole 61, guiding hole 62, first forming plate 63, second forming plate 64, retaining bar 65, pressing bar 66, pressing piece 67, adjusting groove 68, adjusting bar 69, third forming plate 610, adjusting plane 611, adjusting piece 612, adjusting block 613, welding torch 7, first guiding wheel 8, adjusting rod 9, second guiding wheel 10 are used more frequently in this text, it does not exclude the possibility of using other terms. These terms are only used to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A processing device for spiral finned tubes, comprising a frame (1) and a driving structure (3) arranged on the frame (1) for driving a steel tube (2) to move and rotate, a feeding structure (5) for feeding fins, a forming structure (6) and a welding gun (7), wherein the forming structure (6) has a welding hole (61) for the steel tube (2) to pass through and a guide hole (62) for the fin to pass through, the welding hole (61) is connected to the guide hole (62), and the welding gun (7) is arranged facing the welding hole (61), characterized in that: A pair of rotatable first guide wheels (8) are provided in the molding structure (6), an adjusting rod (9) is provided on the frame (1), a rotatable second guide wheel (10) is provided on the adjusting rod (9), the pair of the first guide wheels (8) and the second guide wheels (10) are arranged in an isosceles triangle, and the pair of the first guide wheels (8) and the second guide wheels (10) are both partially located in the welding hole (61).

2. The spiral fin tube processing device according to claim 1, characterized in that: The central axes of the pair of first guide wheels (8) and the second guide wheels (10) are parallel, the pair of first guide wheels (8) are located at the same height in the vertical direction, the second guide wheel (10) is located directly below the middle of the pair of first guide wheels (8), and the pair of first guide wheels (8) and the second guide wheels (10) are arranged in an equilateral triangle.

3. The spiral fin tube processing device according to claim 1, characterized in that: The adjusting rod (9) is threadedly connected to the frame (1), and the second guide wheel (10) is arranged on the top of the adjusting rod (9).

4. The spiral fin tube processing device according to claim 1, 2 or 3, characterized in that: The molding structure (6) comprises a first molding plate (63), a second molding plate (64), a stop bar (65), a pressure bar (66) and a circular pressing piece (67); a pair of the first guide wheels (8) are rotatably embedded in the first molding plate (63); the stop bar (65) is embedded and fixed in the first molding plate (63) so that the pair of the first guide wheels (8) are axially positioned; the first molding plate (63) and the second molding plate (64) are fitted and fixedly connected; the guide hole (62) is located between the stop bar (65) and the second molding plate (64); the pressing piece (67) is rotatably arranged at the bottom of the pressure bar (66); the bottom of the pressure bar (66) is penetrated and positioned between the first molding plate (63) and the second molding plate (64); and a portion of the pressing piece (67) is located at the top of the guide hole (62).

5. The spiral fin tube processing device according to claim 4, characterized in that: The second forming plate (64) has an adjustment groove (68) on one side facing the first forming plate (63), an adjustment bar (69) is detachably positioned in the adjustment groove (68), the adjustment bar (69) is arranged opposite to the stop bar (65), and the guide hole (62) is located between the stop bar (65) and the adjustment bar (69).

6. The spiral fin tube processing device according to claim 4, characterized in that: The molding structure (6) further comprises a third molding plate (610) fixedly connected below the first molding plate (63), the third molding plate (610) having an adjustment plane (611), the third molding plate (610) also having an adjustment sheet (612), and a gap for a fin to pass through between the adjustment plane (611) and the adjustment sheet (612).

7. The spiral fin tube processing device according to claim 6, characterized in that: The third forming plate (610) is located obliquely below the welding hole (61), and an adjustment block (613) is movably positioned in the third forming plate (610), and the adjustment sheet (612) is fixedly connected to the adjustment block (613).

8. The spiral fin tube processing device according to claim 1, 2 or 3, characterized in that: The driving structure (3) comprises a driver (31), a chuck (32) for clamping the steel pipe (2), a first positioning column (33), a second positioning column (34) and a driving rod (35) having an external thread and being detachably connected to the steel pipe (2); the driver (31) can drive the chuck (32) to rotate; the first positioning column (33) has a first semicircular thread segment (36); the second positioning column (34) has a second semicircular thread segment (37); the first positioning column (33) and the second positioning column (34) can be relatively moved and positioned; the driving rod (35) can be embedded in the first thread segment (36) and the second thread segment (37); the driving rod (35) can rotate relative to the first positioning column (33) and the second positioning column (34).

9. The spiral fin tube processing device according to claim 1, 2 or 3, characterized in that: The driving structure (3) comprises a driver (31), a chuck (32) for clamping the steel pipe (2), a third positioning column and a driving rod (35) having an external thread and being detachably connected to the steel pipe (2); the driver (31) can drive the chuck (32) to rotate; the third positioning column has a threaded hole, the driving rod (35) passes through the threaded hole, and the driving rod (35) can rotate relative to the third positioning column.

10. The spiral fin tube processing device according to claim 1, 2 or 3, characterized in that: The feeding structure (5) comprises a feeding frame (51) fixed on the frame (1) and a plurality of pairs of feeding columns (52) fixedly connected to the feeding frame (51), each of the feeding columns (52) being sleeved with a plurality of bearings (53), and a gap for a fin to pass through is provided between two adjacent groups of the bearings (53).

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