A tube winding device for winding a tube-in-tube heat exchanger core

Abstract

A tube winding device for winding a tube-in-tube heat exchanger core body, characterized by comprising: a support ring (1) for sleeving on the outer periphery of the core body (2) and capable of axially moving relative to the core body (2) under the action of an external force; a rotating ring (3) for sleeving on the outer periphery of the core body (2) and rotatably constrained on the support ring (1), and a winding structure for winding the heat exchange tube (21) is provided on the rotating ring (3); a first driving member (4) acting on the rotating ring (3) for driving the rotating ring (3) to rotate relative to the support ring; a second driving member (5) acting on the support ring (1) and providing the above-mentioned external force to drive the support ring (1) to axially move, so that the heat exchange tube (21) is spirally wound around the outer periphery of the core body (2). Compared with the prior art, the present application can reduce the risks of offset at the inlet and outlet ends of the core body and wear of the heat exchange tube.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchangers, and particularly relates to a tube winding device for winding a tube heat exchanger core body. Background Art

[0002] At present, the production of tube heat exchanger core bodies all adopts the method of winding heat exchange tubes on the core body by rotating the core body. For example, the tube winding machine disclosed in the invention patent "A Tube Winding Machine" (authorized announcement number: CN104444563A) with the patent number CN201410663041.9 includes a supporting wheel for carrying the tube to be wound, a tube feeding device and a tube unwinding device. The tube feeding device successively includes a tube feeding base, a lifting mechanism, a fine adjustment mechanism, a supporting seat, a radial adjustment mechanism and a supporting wheel from bottom to top; the tube unwinding device includes a tube unwinding base, a chassis is arranged on the tube unwinding base, a bracket is arranged on the chassis, an axial clamping mechanism, a radial clamping mechanism, a telescopic sleeve, an anti-shrinkage mechanism and various sensors and control systems are arranged on a turntable on the bracket. This patent can track the tube feeding position in real time, adjust the tube feeding height, tube feeding angle and tube feeding speed, and ensure the winding quality.

[0003] Another example is the tube winding machine disclosed in the utility model patent "Tube Winding Machine" (authorized announcement number: CN207629055U) with the patent number CN201721747753.4, which includes a motor and two central shafts respectively fixed on the tube plates at both ends and distributed coaxially. Each central shaft is supported on its respective base through its respective spherical roller bearing, and one of the central shafts is connected to the output shaft of the motor. This patent uses spherical roller bearings and central shafts to support the entire tube bundle tube plate, making the tube plate suspended and the outer circle of the tube plate no longer being rolled, which can protect the tube plate material from wear.

[0004] With the enlargement of tube heat exchangers, the existing tube winding machines have the following technical problems to be solved: Most of the existing tube winding machines wind the heat exchange tubes around the outer periphery of the core body by rotating the core body. With the enlargement of tube heat exchangers, the number of rotation circles of the core body increases significantly, and the long-term rotation will cause problems such as the deviation of the core body at the winding-in and winding-out ends and the wear of the heat exchange tubes. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a tube winding device for winding a tube heat exchanger core body according to the current situation of the prior art, so as to reduce the risk of deviation of the core body at the winding-in and winding-out ends and wear of the heat exchange tubes.

[0006] The technical solution adopted by the present invention to solve the above technical problem is: A tube winding device for winding a tube heat exchanger core body, which is characterized by comprising:

[0007] A support ring for sleeving on the outer periphery of the core body and capable of axially moving relative to the core body under the action of an external force;

[0008] A rotating ring is used to be sleeved on the outer periphery of the core body and is rotatably constrained on the supporting ring. The rotating ring is provided with a winding structure for the heat exchange tube to be wound thereon;

[0009] A first driving member acts on the rotating ring and is used to drive the rotating ring to rotate relative to the supporting ring, so that the heat exchange tubes on the winding structure are wound around the core body;

[0010] The second driving member acts on the support ring and provides the above-mentioned external force to drive the support ring to move axially, so that the heat exchange tube is spirally wound around the periphery of the core.

[0011] Preferably, the second driving member includes a trolley that can move along the axial direction of the core body, and the trolley is arranged below the support ring and connected to the bottom of the support ring. Of course, the second driving member can also be a hydraulic cylinder, a pneumatic cylinder, etc., whose output shaft is horizontally arranged and connected to the support ring to drive the support ring to move.

[0012] In order to further limit the moving track of the trolley, preferably, a track is also included, which extends along the axial direction of the core body, and the trolley is arranged on the track.

[0013] In the above scheme, in order to drive the rotating ring to rotate without affecting the winding of the heat exchange tube, preferably, the first driving member includes a motor and a first gear that is transmission-connected to the output end of the motor; a plurality of rotating shafts are circumferentially evenly spaced on the outer ring of the rotating ring, and both ends of each rotating shaft are rotationally connected to the rotating ring, and each rotating shaft extends along the axial direction of the rotating ring, and a gap is formed between two adjacent rotating shafts for the tooth portion of the above-mentioned first gear to be inserted into.

[0014] Preferably, there are two first gears and they are arranged at intervals along the circumference of the rotating ring at the bottom of the rotating ring. The first driving member also includes a second gear connected to the output shaft of the motor and a transmission belt connected end to end and meshing with the first and second gears. There are two transmission belts, and each transmission belt is arranged on the outer ring of the second gear and the corresponding first gear.

[0015] Preferably, the rotating ring is rotatably constrained on the inner ring of the supporting ring, and the inner ring of the supporting ring is provided with an annular groove for the outer ring of the rotating ring to be inserted therein, and the first gear is arranged in the annular groove.

[0016] More preferably, at least two bearings for supporting the rotating ring so that the rotating ring can rotate relative to the supporting ring are provided in the annular groove along the circumferential direction.

[0017] In the above - mentioned solutions, on the axial end surface of the rotating ring, a plurality of mounting holes are circumferentially spaced apart. The winding structure includes an annular tube disk. The outer ring of the tube disk has a first annular groove for the heat - exchange tubes to be wound thereon. The center of the tube disk is rotatably connected to the mounting holes through a central shaft, and the tube disk is located outside the core body. In this way, when the core body starts to be wound, there is a large space between the core body and the rotating ring. At this time, the tube disk can be used for winding.

[0018] To improve the tube - winding efficiency, preferably, there are at least two tube disks, and they are equally spaced along the circumferential direction of the rotating ring. More preferably, there are at least three tube disks and they are equally spaced along the circumferential direction of the rotating ring.

[0019] In the above - mentioned solutions, on the axial end surface of the rotating ring, a plurality of mounting holes are circumferentially spaced apart. The winding structure includes winding frames inserted at the mounting holes. There are a plurality of winding frames arranged along the circumferential direction of the rotating ring, and the plurality of winding frames form an annular surface for the heat - exchange tubes to be wound thereon. When the core body is wound to have a relatively large outer diameter, the space between the core body and the rotating ring is small. At this time, the heat - exchange tubes on the winding frames can be used for winding. Of course, the heat - exchange tubes on the winding frames can also be used for winding all the time.

[0020] Preferably, taking a plurality of winding frames as a group, there are two groups of winding frames located on both sides of the axial direction of the rotating ring.

[0021] Compared with the prior art, the advantages of the present invention are as follows: By providing a support ring, a rotating ring, a first driving member, and a second driving member, both the support ring and the rotating ring are sleeved on the outer periphery of the core body, and the rotating ring is rotatably constrained within the inner ring of the support ring. Under the action of the first and second driving members, the rotating ring can rotate and reciprocate axially along the core body. In this process, the heat - exchange tubes on the winding structure of the rotating ring can be helically wound on the core body, and the core body does not need to rotate during the winding process, thereby reducing the fatigue risk of the central tube of the core body. And because the core body does not need to rotate, but directly winds the heat - exchange tubes on the core body, it can reduce the offset of the core body at the winding - in and winding - out ends, the wear of the heat - exchange tubes, improve the quality of the core body, and extend the service life of the entire heat exchanger. And the tube - winding equipment of the present application can realize the automation of the core - body winding process by controlling the rotation speed and moving speed of the rotating ring, thereby improving the tube - winding efficiency. The tube - winding equipment of the present application has a simple structure and is easy to implement. It can be used for the core - body winding of large - scale tube - winding heat exchangers and can also be used for the core - body winding of general tube - winding heat exchangers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front view of the tube - winding equipment in the working state in the embodiment of the present invention;

[0023] Figure 2 is Figure 1 the left view of

[0024] Figure 3 This is a partial cross-sectional view of the tube winding device in the embodiment of the present invention;

[0025] Figure 4 This is another cross-sectional view of the partial structure of the tube winding device in the embodiment of the present invention;

[0026] Figure 5 This is a partial cross-sectional view of the structure of the tube winding device equipped with a winding rack in the embodiment of the present invention;

[0027] Figure 6 This is a partial cross-sectional view of the structure of the tube winding device equipped with a tube coil in the embodiment of the present invention;

[0028] Figure 7 is Figure 6 an enlarged view of part A in

[0029] Figure 8 is Figure 4 an enlarged view of part B in

[0030] Figure 9 This is a schematic structural view of the tube coil, heat exchange tube, and tube output mechanism in the embodiment of the present invention;

[0031] Figure 10 is Figure 9 an enlarged view of part C in

[0032] Figure 11 is Figure 9 an enlarged view of part D in Detailed implementation manners

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] As Figures 1 to 11 shown, this is a preferred embodiment of a tube winding device for winding a tube - type heat exchanger core body of the present invention. The tube winding device includes a support ring 1, a rotating ring 3, a first driving member 4, a second driving member 5, a tube output mechanism 8, and a bracket 9.

[0035] Among them, there are two brackets 9 for supporting both ends of the core body 2. The support ring 1 is a circular ring for sleeving on the outer periphery of the core body 2 and can axially move relative to the core body 2 under an external force. The rotating ring 3 is a circular ring for sleeving on the outer periphery of the core body 2 and is rotatably constrained within the inner ring of the support ring 1. The first driving member 4 acts on the rotating ring 3 to drive the rotating ring 3 to rotate. The second driving member 5 acts on the support ring 1 and provides the above-mentioned external force to drive the support ring 1 to move. In this embodiment, an annular groove 10 is formed on the inner ring of the support ring 1 for the outer ring of the rotating ring 3 to be inserted therein. A plurality of rotating shafts 31 are circumferentially and equally spaced on the outer ring of the rotating ring 3. Both ends of each rotating shaft 31 are rotatably connected to the rotating ring 3, and each rotating shaft 31 extends along the axial direction of the rotating ring 3. A gap 310 is formed between two adjacent rotating shafts 31. The above-mentioned first driving member 4 includes a motor 41, a first gear 42, a second gear 43, and a transmission belt 44. Among them, the motor 41 is fixed relative to the support ring 1, the second gear 43 is connected to the output shaft of the motor 41, there are two first gears 42 which are circumferentially spaced below the bottom of the rotating ring 3 and are located within the annular groove 10 of the support ring 1. The tooth parts of each first gear 42 can be caught in the gap 310 between two adjacent rotating shafts 31, so that the rotation of the first gear 42 can drive the rotating ring 3 to rotate; the above-mentioned transmission belt 44 is in a closed-loop shape with its head and tail connected. There are two such transmission belts 44, and each transmission belt 44 is arranged on the outer circles of the second gear 43 and its corresponding first gear 42 and meshes with the first and second gears. In this way, the rotational motion of the output shaft of the motor 41 can drive the first gear 42 to rotate through the transmission of the second gear 43 and the transmission belt 44, and then drive the rotating ring 3 to rotate. At the same time, a plurality of bearings 100 for supporting the rotating ring 3 so that the rotating ring 3 can rotate relative to the support ring 1 are installed between the support ring 1 and the rotating ring 3 in this embodiment. The bearings 100 are arranged in the annular groove 10 and are circumferentially spaced along the annular groove 10. There are four bearings in this embodiment and they are located at the lower part of the annular groove 10.

[0036] The pipe winding device in this embodiment includes a trolley 51 that can move axially along the core body 2. The trolley 51 is arranged below the support ring 1 and is connected to the bottom of the support ring 1. The second driving member 5 acts on the trolley 51 to drive the trolley 51 to move. The second driving member can be a hydraulic cylinder, a pneumatic cylinder or a driving assembly having a motor and transmission parts, etc. To enable the trolley 51 to only move axially along the core body 2, a track 52 is further included. The track 52 extends along the axial direction of the core body 2, and the trolley 51 is arranged on the track 52.

[0037] To realize the supply of the heat exchange pipe 21, a winding structure for winding the heat exchange pipe 21 thereon is provided on the rotating ring 3. In this embodiment, a plurality of mounting holes 30 for connecting the winding structure are circumferentially spaced on the axial end surface of the rotating ring 3. The winding structure includes a pipe disc 6 and a winding frame 7. When winding the pipe, one of them is alternatively installed at the mounting hole 30.

[0038] As Figure 6 shown, when the tube tray 6 is selected for installation, there are at least two (4 in this embodiment) tube trays 6, which are arranged at equal intervals along the circumferential direction of the rotating ring 3. The outer ring of each tube tray 6 has a first annular groove 60 for the heat exchange tube 21 to wind around. The center of the tube tray 6 is rotationally connected to the installation hole 30 through a central shaft, and the tube tray 6 is located outside the core body 2. In this embodiment, the center of the tube tray 6 deviates from the installation hole 30 and is close to the core body 2. The central shaft is Z-shaped, with its first end installed in the installation hole 30 and its second end rotationally connected to the center of the tube tray 6 to prevent the tube tray 6 from contacting the trolley 51 below during rotation.

[0039] As Figure 2 、 3 、5 shown, when the winding frame 7 is selected for installation, there are several winding frames 7 arranged along the circumferential direction of the rotating ring 3, and the several winding frames 7 form an annular surface for the heat exchange tube 21 to wind around. And taking several winding frames 7 as a group, there are two groups of winding frames 7 located on both sides of the axial direction of the rotating ring 3. In this embodiment, each winding frame 7 is inserted into the installation hole 30.

[0040] When starting to wind the tube, multiple tube trays 6 can be selected, that is, multiple heat exchange tubes 21 are wound synchronously; when the core body 2 is wound to a certain volume, at this time, the space between the outer side wall of the core body 2 and the inner ring of the rotating ring 3 is small, and the tube tray 6 is restricted. The tube tray 6 can be removed, and the winding frame 7 is installed on one side or both sides of the axial direction of the rotating ring 3. The heat exchange tube 21 to be wound is wound around the winding frame 7, and then the tube winding operation is continued until the required core body is wound.

[0041] Of course, it is also possible to use only the heat exchange tubes on the winding frame 7 for winding throughout the process. The above-mentioned tube output mechanism 8 acts on the heat exchange tube 21 output from the winding structure, and it includes a tube leveling structure 81, a tube damping structure 82, and a tube output structure 83. The above-mentioned tube leveling structure 81, tube damping structure 82, and tube output structure 83 adopt existing technologies, and the structure is as Figures 8 to 10 shown to pull the heat exchange tube 21 to move and correct the straightness of the heat exchange tube 21, thereby improving the tube winding quality.

[0042] The steps of winding the tube using the tube winding equipment of this embodiment are as follows:

[0043] First, place the tube winding equipment between two brackets 9, pass the central cylinder 2 through the rotating ring 3 of the tube winding equipment, and the two ends of the central cylinder 2 are supported on the two brackets 9;

[0044] Second, install the tube plates 6 on the mounting holes 30 of the rotating ring 3 on the same side, fix the starting end of the heat exchange tubes 21 on the tube plates 6 to the central cylinder of the core body 2, and then drive the above-mentioned first and second driving members so that the rotating ring 3 can rotate and reciprocate axially along the core body 2, realizing that the heat exchange tubes on the tube plates 6 are helically wound around the outer periphery of the core body 2;

[0045] Third, when the core body 2 is wound to a certain volume, its outer diameter is relatively large and the space between the core body 2 and the rotating ring 3 is small. At this time, control the first and second driving members to stop working, then remove the tube plates 6, install the winding frames 7 on the mounting holes 30 of the rotating ring 3, wind the heat exchange tubes to be wound around the winding frames 7, and fix the starting ends of the heat exchange tubes on the winding frames 7 to the core body 2. Finally, drive the first and second driving members to work, realizing that the heat exchange tubes on the winding frames are helically wound around the outer periphery of the core body 2 until the required core body 2 is wound.

Claims

1. A tube winding device for winding a tube-in-tube heat exchanger core, characterized in that include: A support ring (1) is used to be sleeved on the outer periphery of the core body (2) and can move axially relative to the core body (2) under the action of an external force; A rotating ring (3) is used to be sleeved on the outer circumference of the core (2) and is rotatably constrained on the support ring (1); the rotating ring (3) is provided with a winding structure for the heat exchange tube (21) to be wound thereon; A first driving member (4) acts on the rotating ring (3) and is used to drive the rotating ring (3) to rotate relative to the supporting ring (1), so that the heat exchange tube (21) on the winding structure is wound around the outer periphery of the core (2); The second driving member (5) acts on the support ring (1) and provides the above-mentioned external force to drive the support ring (1) to move axially, thereby causing the heat exchange tube (21) to be spirally wound around the outer periphery of the core (2).

2. The tube winding device according to claim 1, wherein: The second driving member (5) comprises a trolley (51) that can move along the axial direction of the core (2); the trolley (51) is arranged below the support ring (1) and connected to the bottom of the support ring (1).

3. The pipe winding device according to claim 2, characterized in that: It also includes a track (52) which extends along the axial direction of the core (2), and the trolley (51) is arranged on the track (52).

4. The pipe winding device according to claim 1, wherein: The first driving member (4) comprises a motor (41) and a first gear (42) drivingly connected to the output end of the motor (41); a plurality of rotating shafts (31) are arranged at equal intervals along the circumferential direction on the outer ring of the rotating ring (3); both ends of each rotating shaft (31) are rotatably connected to the rotating ring (3), and each rotating shaft (31) extends along the axial direction of the rotating ring (3); and a gap (310) is formed between two adjacent rotating shafts (31) for the teeth of the first gear (42) to be inserted into the gap.

5. The tube winding device according to claim 4, wherein: There are two first gears (42) which are arranged at intervals along the circumference of the rotating ring (3) at the bottom of the rotating ring (3). The first driving member (4) also includes a second gear (43) connected to the output shaft of the motor (41) and a transmission belt (44) connected end to end and meshing with the first and second gears. There are two transmission belts (44), and each transmission belt (44) is arranged on the outer ring of the second gear (43) and the first gear (42) corresponding to each other.

6. The tube winding device according to claim 4, characterized in that: The rotating ring (3) is rotatably constrained on the inner ring of the supporting ring (1), and the inner ring of the supporting ring (1) is provided with an annular groove (10) for the outer ring of the rotating ring (3) to be inserted therein, and the first gear (42) is arranged in the annular groove (10).

7. The tube winding device according to claim 6, characterized in that: At least two bearings (100) for supporting the rotating ring (3) are arranged in the annular groove (10) along the circumferential direction so as to enable the rotating ring (3) to rotate relative to the supporting ring (1).

8. The tube winding device according to any one of claims 1 to 7, characterized in that: A plurality of mounting holes (30) are provided on the axial end surface of the rotating ring (3) at intervals in the circumferential direction. The winding structure comprises an annular tube disc (6). The outer ring of the tube disc (6) has a first annular groove (60) for the heat exchange tube (21) to be wound thereon. The center of the tube disc (6) is rotatably connected to the mounting hole (30) via a central axis, and the tube disc (6) is located on the periphery of the core body (2).

9. The tube winding device according to claim 8, wherein: There are at least two tube discs (6), which are arranged at equal intervals along the circumference of the rotating ring (3).

10. The tube winding device according to any one of claims 1 to 7, characterized in that: On the axial end surface of the rotating ring (3), a plurality of mounting holes (30) are circumferentially spaced apart. The winding structure includes winding frames (7) inserted at the mounting holes (30). There are a plurality of such winding frames (7) arranged along the circumference of the rotating ring (3), and the plurality of winding frames (7) form an annular surface around which the heat exchange tubes (21) are wound.

11. The tube winding device according to claim 10, characterized in that: Taking a plurality of winding frames (7) as a group, there are two groups of winding frames (7) located on both axial sides of the rotating ring (3).

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