Finned tube bending device

Abstract

The utility model provides a finned tube bending device which comprises a fixing part, a transmission part and a bending part, the bending part comprises a bending wheel and a fixing frame, the fixing frame is fixedly connected with a sliding block, the bending wheel is connected to the fixing frame in a pivot mode, the bending wheel comprises an upper idler wheel and a lower idler wheel, and the upper idler wheel and the lower idler wheel are arranged on the transmission part. The upper rolling wheel and the lower rolling wheel are oppositely arranged in a vertically spaced mode, the bottom of the upper rolling wheel abuts against the top of the finned tube, the top of the lower rolling wheel abuts against the bottom of the finned tube, and the positions, making contact with the finned tube, of the upper rolling wheel and the lower rolling wheel are arranged to be in the shape corresponding to the finned tube. The bending device has the advantages of being simple in structure, ingenious in design, capable of improving working efficiency, accurate in bending and the like.

Description

Technical Field

[0001] The utility model relates to the field of fin tubes, in particular to a fin tube bending device. Background Art

[0002] Finned tube is a heat exchange element. In order to improve the heat exchange efficiency, fins are usually added to the surface of the heat exchange tube to increase the surface area of ​​the heat exchange tube, thereby achieving the purpose of improving the heat exchange efficiency. In order to increase the heat exchange area, the fins on the surface of the finned tube will be increased, but at this time the distance between adjacent finned tubes will be larger, which may lead to a decrease in heat exchange effect.

[0003] Therefore, it is necessary to provide a new technical solution. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, the utility model discloses a fin tube bending device, and the specific technical solution is as follows:

[0005] The utility model provides a fin tube bending device, comprising a fixing part, a transmission part and a bending part.

[0006] The fixing part includes a first working surface, a second working surface fixed above the first working surface, and a pull rod, a strip groove is arranged in the middle of the second working surface, the pull rod is fixed above the strip groove, and the fin tube sleeve is fixed on the pull rod;

[0007] The transmission part includes a servo motor, a screw rod and a slider, wherein the servo motor is fixed at the end of the first working surface, the servo motor drives the screw rod to rotate forward or reverse, the slider and the screw rod are threadedly connected, and the servo motor drives the slider forward or backward through the screw rod, and the screw rod is parallel to the pull rod;

[0008] The bending portion includes a bending wheel and a fixing frame, the fixing frame is fixedly connected to the slider, the bending wheel is pivotally connected to the fixing frame, the bending wheel includes an upper roller and a lower roller, the upper roller and the lower roller are arranged opposite to each other with an upper and lower interval, the bottom of the upper roller abuts against the top of the fin tube, the top of the lower roller abuts against the bottom of the fin tube, and the upper roller and the lower roller are arranged to correspond to the shape of the fin tube at the position where they contact the fin tube.

[0009] Furthermore, two of the upper rollers and two of the lower rollers are horizontally arranged along the direction of the pull rod.

[0010] Furthermore, the first working surface and the second working surface are connected and fixed at four corners.

[0011] A guide rail parallel to the strip groove is arranged on the first working surface below the strip groove.

[0012] Furthermore, the bending portion further includes a base and a roller frame.

[0013] A card slot is provided below the base, the card slot is engaged with the guide rail and can move back and forth along the guide rail, the slider and the fixing frame are both fixed on the top of the base,

[0014] One end of the roller frame is fixed on the base, and the other end of the roller frame goes upward from one side of the second working surface, bypasses the top of the second working surface, and is connected and fixed to the base downward from the other side of the second working surface.

[0015] Furthermore, a positioning rod is arranged on the top of the fixing frame, and the positioning rod passes through the roller frame upward. When the diameter or bending size of the fin tube changes, the spacing between the upper and lower roller devices can be increased or decreased by adjusting the positioning rod.

[0016] Furthermore, the bending portion further comprises a top wheel device, and the top wheel device comprises a U-shaped plate, a top wheel, an adjustment screw and a top pin.

[0017] The U-shaped plate is fixed on the fixing frame, and the opening end of the U-shaped plate faces the fin tube. The U-shaped plate is symmetrically provided with waist-shaped holes on opposite plate walls.

[0018] A movable shaft is provided in the waist-shaped hole.

[0019] The top wheel is arranged between the plate walls of the U-shaped plate and is pivotally connected to the moving shaft. The top wheel can move forward and backward along the waist-shaped hole. The outer edge of the top wheel is arranged to correspond to the shape of the fin tube.

[0020] The top of the adjusting screw passes through the bottom of the U-shaped plate and is fixedly connected to the ejector pin. A ball is provided at the end of the ejector pin and is in rolling contact with the ejector wheel. The adjusting screw is threadedly connected to the U-shaped plate, and the adjusting screw controls the forward and backward movement of the ejector wheel.

[0021] The utility model has the following beneficial effects:

[0022] 1. The fin tube bending device provided by the utility model has bending wheels that are symmetrically arranged front and back. During actual processing, it is only necessary to adjust the rotation direction of the servo motor, and the bending wheel assembly does not need to return to the bending origin, so continuous bending can be achieved, and the efficiency is doubled.

[0023] 2. The fin tube bending device provided by the utility model has a simple structure, with only one transmission and movable device, namely a servo motor, and does not require an additional fin tube clamping device, thereby avoiding the front-to-back inconsistency of the fin bending caused by the looseness of the fin tube clamping device.

[0024] 3. The fin tube bending device provided by the utility model can be used to bend fins of fin tubes with any diameter by only adjusting the diameter of the pull rod and the bending wheel.

[0025] 4. The fin tube bending device provided by the utility model can bend fin tubes of different shapes simply by adjusting the shape of the bending wheel.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of a fin tube bending device provided in an embodiment of the utility model.

[0029] Figure 2 It is a structural schematic diagram of a fin tube bending device provided in an embodiment of the utility model.

[0030] Figure 3 It is a structural schematic diagram of a bending wheel and a top wheel device in a bending part provided in an embodiment of the utility model.

[0031] The accompanying drawings are marked as follows: 1. fixing part; 2. transmission part; 3. bending part; 11. first working surface; 12. second working surface; 13. pull rod; 14. guide rail; 21. servo motor; 22. screw rod; 23. slider; 31. bending wheel; 32. fixing frame; 33. base; 34. roller frame; 35. top wheel device; 311. upper roller; 312. lower roller; 331. slot; 321. positioning rod; 351. U-shaped plate; 352. top wheel; 353. adjustment screw; and ejector pin 354. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The utility model provides a fin tube bending device, referring to Figures 1 to 3 , including a fixing part 1, a transmission part 2 and a bending part 3. The fixing part 1 includes a first working surface 11, a second working surface 12 fixed above the first working surface 11 and a tie rod 13, a strip groove is arranged in the middle of the second working surface 12, the tie rod 13 is fixed above the strip groove, and the fin tube is sleeved and fixed on the tie rod 13. A guide rail 14 parallel to the strip groove is arranged on the first working surface 11 below the strip groove. The first working surface 11 and the second working surface 12 are connected and fixed at four corners.

[0036] The transmission part 2 includes a servo motor 21, a screw rod 22 and a slider 23. The servo motor 21 is fixed at the end of the first working surface 11. The servo motor 21 drives the screw rod 22 to rotate forward or reverse. The slider 23 is threadedly connected to the screw rod 22. The servo motor 21 drives the slider 23 forward or backward through the screw rod 22. The screw rod 22 is parallel to the pull rod 13.

[0037] The bending part 3 includes a bending wheel 31, a fixing frame 32, a base 33 and a roller frame 34. The fixing frame 32 is fixedly connected to the slider 23. The bending wheel 31 is pivotally connected to the fixing frame 32. The bending wheel 31 includes an upper roller 311 and a lower roller 312. The upper roller 311 and the lower roller 312 are arranged relative to each other with an upper and lower interval. The bottom of the upper roller 311 abuts against the top of the fin tube, and the top of the lower roller 312 abuts against the bottom of the fin tube. The upper roller 311 and the lower roller 312 are arranged to correspond to the shape of the fin tube at the position in contact with the fin tube. In order to ensure the service life of the bending wheel, the surface of the bending wheel needs to be carburized to improve its surface hardness and wear resistance.

[0038] In one embodiment, two upper rollers 311 and two lower rollers 312 are horizontally arranged along the pull rod 13 to prevent a single roller from being bent out of position.

[0039] A slot 331 is provided below the base 33, and the slot 331 is engaged with the guide rail 14 and can move back and forth along the guide rail 14. The slider 23 and the fixing frame 32 are both fixed to the top of the base 33. One end of the roller frame 34 is fixed to the base 33, and the other end of the roller frame 34 goes upward from one side of the second working surface 12, bypasses the top of the second working surface 12, and is connected and fixed to the base 33 downward from the other side of the second working surface 12. A positioning rod 321 is provided on the top of the fixing frame 32, and the positioning rod 321 passes through the roller frame 34 upward.

[0040] In one embodiment, the bending portion 3 further includes a top wheel device 35, and the top wheel device 35 includes a U-shaped plate 351, a top wheel 352, an adjustment screw 353 and a top pin 354. The U-shaped plate 351 is fixed on the fixing frame 32, and the open end of the U-shaped plate 351 faces the fin tube, and the U-shaped plate 351 is symmetrically provided with waist-shaped holes on the opposite plate walls. A moving shaft 355 is clamped in the waist-shaped hole, and the top wheel 352 is arranged between the plate walls of the U-shaped plate 351 and is pivotally connected to the moving shaft 355. The top wheel 352 can move forward and backward along the waist-shaped hole, and the outer edge of the top wheel 352 is set to correspond to the shape of the fin tube. The top of the adjusting screw 353 passes through the bottom of the U-shaped plate 351 and is fixedly connected to the ejector pin 354. A ball is provided at the end of the ejector pin 354 and is in rolling contact with the ejector wheel 352. The adjusting screw 353 is threadedly connected to the U-shaped plate 351, and the adjusting screw 353 controls the forward and backward movement of the ejector wheel 352.

[0041] The top wheel device fixes the fin tube to be bent on the center line of the bending wheel assembly to avoid eccentricity of the fin tube during the bending process, which causes inconsistency between the front and rear bending of the fin.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0043] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify and vary the above embodiments within the scope of the present invention.

Claims

1. A fin tube bending device, characterized in that: It includes a fixing part, a transmission part and a bending part. The fixing part includes a first working surface, a second working surface fixed above the first working surface, and a pull rod, a strip groove is arranged in the middle of the second working surface, the pull rod is fixed above the strip groove, and the fin tube sleeve is fixed on the pull rod; The transmission part includes a servo motor, a screw rod and a slider, wherein the servo motor is fixed at the end of the first working surface, the servo motor drives the screw rod to rotate forward or reverse, the slider and the screw rod are threadedly connected, and the servo motor drives the slider forward or backward through the screw rod, and the screw rod is parallel to the pull rod; The bending portion includes a bending wheel and a fixing frame, the fixing frame is fixedly connected to the slider, the bending wheel is pivotally connected to the fixing frame, the bending wheel includes an upper roller and a lower roller, the upper roller and the lower roller are arranged opposite to each other with an upper and lower interval, the bottom of the upper roller abuts against the top of the fin tube, the top of the lower roller abuts against the bottom of the fin tube, and the upper roller and the lower roller are arranged to correspond to the shape of the fin tube at the position where they contact the fin tube.

2. The fin tube bending device according to claim 1, characterized in that: Two upper rollers and two lower rollers are horizontally arranged along the direction of the pull rod.

3. The fin tube bending device according to claim 1, characterized in that: The first working surface and the second working surface are connected and fixed at four corners. A guide rail parallel to the strip groove is arranged on the first working surface below the strip groove.

4. The fin tube bending device according to claim 3, characterized in that: The bending part also includes a base and a roller frame. A card slot is provided below the base, the card slot is engaged with the guide rail and can move back and forth along the guide rail, the slider and the fixing frame are both fixed on the top of the base, One end of the roller frame is fixed on the base, and the other end of the roller frame goes upward from one side of the second working surface, bypasses the top of the second working surface, and is connected and fixed to the base downward from the other side of the second working surface.

5. The fin tube bending device according to claim 4, characterized in that: A positioning rod is arranged on the top of the fixing frame, and the positioning rod passes through the roller frame upward.

6. The fin tube bending device according to claim 1, characterized in that: The bending part also includes a top wheel device, which includes a U-shaped plate, a top wheel, an adjustment screw and a top pin. The U-shaped plate is fixed on the fixing frame, and the opening end of the U-shaped plate faces the fin tube. The U-shaped plate is symmetrically provided with waist-shaped holes on opposite plate walls. A movable shaft is provided in the waist-shaped hole. The top wheel is arranged between the plate walls of the U-shaped plate and is pivotally connected to the moving shaft. The top wheel can move forward and backward along the waist-shaped hole. The outer edge of the top wheel is arranged to correspond to the shape of the fin tube. The top of the adjusting screw passes through the bottom of the U-shaped plate and is fixedly connected to the ejector pin. A ball is provided at the end of the ejector pin and is in rolling contact with the ejector wheel. The adjusting screw is threadedly connected to the U-shaped plate, and the adjusting screw controls the forward and backward movement of the ejector wheel.

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