A pipe winding machine for winding heat exchange pipes on a heat exchanger core

Abstract

A pipe winding machine for winding heat exchange pipes on a heat exchanger core, comprising a base, a support arm extending obliquely upward from the base and having a forward oblique direction, the lower end of the support arm being pivotally connected to the base, a pipe winding disc provided on the base at the rear side of the support arm, the pipe winding disc having a bearing part for circumferentially winding pipes on the bearing part to form a coil pipe, the bearing part being pivotable about a central axis, the pipe winding disc being horizontally arranged on the base and having a central part pivotally connected to the base about a second axis extending leftward and rightward, so that the central axis of the pipe winding disc can vertically extend or obliquely extend forward and backward, and the output end of a second driving member acting on the pipe winding disc for driving the pipe winding disc to pivot about the second axis, so that the pipes separated from the bearing part can linearly extend to the upper end of the support arm, and the linear extension direction corresponds to the tangential direction of the outer peripheral surface of the heat exchanger core. The present application can solve the problem of pipe knotting and improve the pipe winding quality.

Description

Technical Field

[0001] This invention belongs to the field of heat exchanger tube winding technology, specifically relating to a tube winding machine for winding heat exchanger tubes on a heat exchanger core. Background Technology

[0002] Existing tube winding machines, such as the invention patent "A Tube Winding Machine" (authorization announcement number CN104444563B) with patent number 201410663041.9, include a support roller for carrying the tube to be wound, a tube feeding device, and a tube unwinding device. The tube feeding device, from bottom to top, includes a tube feeding base, a lifting mechanism, a fine-tuning mechanism, a support seat, a radial adjustment mechanism, and a support roller. The tube unwinding device includes a tube unwinding base, on which a chassis is mounted, and on which a bracket is mounted. The bracket is equipped with an axial clamping mechanism, a radial clamping mechanism, a telescopic sleeve, an anti-shrinkage mechanism, and various sensors and a control system. This invention patent achieves tube winding through the cooperation of the tube feeding device and the tube unwinding device.

[0003] For example, the utility model patent with patent number 201721735342.3, entitled "A Winding Device for Winding Heat Exchanger Tubes in a Winded-Tube Heat Exchanger" (authorization announcement number CN208467092U), discloses a structure that includes a floor-type lathe. This lathe includes a chuck, a tailstock, and a tool post. The tool post is equipped with a clamping mechanism for clamping the heat exchanger tubes. It also includes a support core for winding the tubes, clamped between the chuck and the tailstock. When the chuck drives the support core to rotate, and the tool post moves towards / away from the chuck, the clamping mechanism allows the heat exchanger tubes to be gradually spirally wound onto the support core. Furthermore, it includes a traveling trolley for placing the wound heat exchanger tubes. The traveling trolley includes a base plate with rollers mounted on its bottom. Two uprights are fixed to the top of the base plate, and a crossbar is detachably mounted between the two uprights. Thus, the winding of the tubes is achieved through the cooperation of the traveling trolley and the clamping mechanism.

[0004] The aforementioned patent requires the cooperation of at least two devices to achieve tube winding, and the compactness of the structure needs to be further improved.

[0005] To improve structural compactness, the applicant designed an invention patent entitled "A Tube Winding Machine" with application number 202311269144.2 and authorization announcement number CN117245024B. This machine includes: a base; a winding disc mounted on a central rotating shaft and having a bearing wall circumferentially surrounding the central rotating shaft for winding a tube circumferentially; a tube feeding device including a damping component; and a support column extending obliquely upwards from the base, with the oblique direction being backwards; a support arm extending forward from the lower end of the support column, with a through hole at the front end of the support arm for the tube to pass through; the winding disc is mounted on the support column in a manner rotatable around the central rotating shaft extending laterally; and the tube feeding device is mounted on the support arm and located behind the through hole to drive the tube forward. This tube winding machine has the following three main problems in actual use:

[0006] 1. Occasionally, during the process of outputting the tube from the tube coil, the tube may become knotted or stuck.

[0007] 2. There is a distance between the tube output from the front end of the support arm and the core of the tube. Even if there is a damping component acting on the tube to limit the tube from moving forward, there are still problems such as the tube wound on the core being uneven and not straight, which affects the quality of the tube winding.

[0008] 3. The tubes output from the tube coil are not straight; the curved tubes are difficult to fit into the channels of the damping components.

[0009] 4. Occasionally, the winding machine deviates from its intended path when traveling in a straight line along the length of the winding core. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to provide a tube winding machine for winding heat exchange tubes on the heat exchanger core, which can solve the problems of tube knotting and jamming, and improve the winding quality.

[0011] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a tube winding machine for winding heat exchanger tubes on a heat exchanger core, comprising:

[0012] Base;

[0013] A support arm extends upward at an angle from the base, with the angle of inclination being forward. The lower end of the support arm is constrained to the base by means of a first axis that extends left and right and can rotate up and down. The upper end of the support arm is a free end used to support the tube. The support arm can rotate up and down under the action of a first driving member.

[0014] A coiled tube is mounted on a base and located behind the support arm. The coiled tube has a bearing portion extending circumferentially around its central axis. The bearing portion is used for winding tubes circumferentially around it to form a coil. The bearing portion can rotate around the central axis so that the tube forming the coil can detach from the bearing portion as the bearing portion rotates and be output forward through the upper end of the support arm.

[0015] Its features are:

[0016] The winding disc is placed horizontally on the base, and the center of the winding disc is constrained on the base in a manner that allows it to rotate up and down around a second axis that extends left and right, so that the central axis of the winding disc can extend vertically or extend forward and backward at an angle.

[0017] The output end of the second driving member acts on the coiled tube, driving the coiled tube to rotate around the second axis until the tube detached from the bearing part can extend in a straight line to the upper end of the support arm, and the extension direction of the straight line corresponds to the tangent of the outer peripheral surface of the heat exchanger core.

[0018] This invention places the tube winding disc horizontally on the base, and the entire tube winding disc can rotate up and down relative to the base. The support arm can also rotate up and down relative to the base. This allows the angles of the tube winding disc and the support arm to be adjusted in real time during the tube winding process. This enables the tube detached from the tube winding disc to extend in a straight line to the upper end of the support arm, and the direction of this straight line extension corresponds to the tangential direction of the outer circumferential surface of the heat exchanger core. This allows the tube to be smoothly wound around the outer circumference of the heat exchanger core, avoiding tube knots and jamming, and improving the quality of tube winding.

[0019] Preferably, the winding disc includes a connecting disc and a rotating disc. The center of the connecting disc is constrained to the base in a manner that allows it to rotate up and down around the second axis. The rotating disc has the aforementioned bearing portion and is rotatably connected to the connecting disc.

[0020] Preferably, the rotating disk has an annular bottom wall, an outer side wall extending upward from the outer periphery of the bottom wall, and an inner side wall extending upward from the inner periphery of the bottom wall. The bottom wall is disposed on the upper surface of the connecting disk. The bottom wall, the outer side wall, and the inner side wall together form an annular cavity to accommodate the coil. This annular cavity is the aforementioned bearing part.

[0021] To address the issues of uneven and non-straight tubes wound on the core and to further improve the quality of the winding, preferably, the support arm can be extended and retracted along its length and positioned so that the upper end of the support arm can approach the outer circumferential surface of the heat exchanger core, thereby pressing the tube tightly against the outer circumferential surface of the heat exchanger core.

[0022] In this invention, the straight-extending tube and the upper end of the support arm used to press the tube against the outer circumferential surface of the heat exchanger core can directly press the straight-extending tube around the outer circumference of the heat exchanger core, improving the tube winding efficiency and quality while avoiding tube bending and knotting, allowing the tube to be smoothly output from the winding disc.

[0023] In order to press the tube tightly onto the outer circumferential surface of the heat exchanger core without affecting the tube winding, preferably, the upper end of the support arm is provided with an elastic mechanism, and the support wheel is rotatably connected to the elastic mechanism through a rotating shaft extending left and right in its center, and the support wheel has a first circumferential wall surrounding the outer circumference of the rotating shaft for supporting the tube.

[0024] The support wheel always tends to float upward under the action of the elastic mechanism, so that the support wheel can press the tube upward and tightly against the outer circumference of the heat exchanger core.

[0025] To ensure that the tube receives a constant upward supporting force throughout the winding process, preferably, the elastic mechanism is a constant-force magnetic spring capable of vertical extension and retraction. The stator of the constant-force magnetic spring is connected to the upper end of the support arm, and the top of the mover of the constant-force magnetic spring is provided with a mounting seat for mounting the support wheel. Under the action of the constant-force magnetic spring, the tube is constantly subjected to a constant lifting force, ensuring that the heat exchanger core is wound straight axially.

[0026] Preferably, the mounting base is disposed on top of the mover of the constant force magnetic spring in a manner that allows it to rotate about a third axis extending vertically from its center. This allows for adjustment according to the helix angle of the winding tube.

[0027] Preferably, there are multiple constant force magnetic springs, which are arranged at intervals along the circumference. The stators of each constant force magnetic spring are connected by an intermediate connecting plate, and the intermediate connecting plate is connected to the upper end of the support arm. The bottom of the mover of each constant force magnetic spring is connected by a lower connecting plate, and the top of the mover of each constant force magnetic spring is connected by an upper connecting plate.

[0028] The mounting base is located above the upper connecting plate, and is connected to a downwardly extending pivot. The pivot passes through a first circular hole in the upper connecting plate and a second circular hole in the intermediate connecting plate, and is situated within the circumference formed by the constant-force magnetic springs. The central axis of the pivot is the aforementioned third axis, and passes through the centers of the first and second circular holes. The engagement of the lower pivot with the intermediate and upper connecting plates does not affect the vertical movement of the mounting base, while also allowing the mounting base to rotate.

[0029] In the above embodiments, preferably, the support arm includes:

[0030] The first arm has its first end mounted on the base in a manner that allows it to rotate up and down around the first axis, and its second end extends forward at an angle.

[0031] The second arm has its first end located at the second end of the first arm in a manner that allows it to rotate up and down around a fourth axis extending left and right. The second end is the upper end of the support arm. The second arm can extend and retract along its own length direction and then be positioned under the drive of the third driving member.

[0032] Preferably, the device further includes a damping assembly disposed at the second end of the first arm. The damping assembly has a channel extending forward and backward for the tube to pass through, and is arranged to generate a damping force when the tube passes through the channel to restrict the tube's forward movement. Driven by a fourth driving member, the damping assembly can rotate and position itself around a fifth axis extending left and right, so that the extension direction of the channel within the damping assembly is consistent with the straight extension direction of the tube. This allows the tube detached from the support portion to pass through the channel in a straight line and extend to the upper end of the support arm. The cooperation between the damping assembly and the support wheel further solves the problems of unevenness and non-straightness of the tube wound on the core, further improving the winding quality. Simultaneously, the design of the structure of this invention allows the tube detached from the support portion to pass through the channel in a straight line and extend to the upper end of the support arm, enabling the tube detached from the support portion to be smoothly wound around the outer periphery of the core and preventing the tube from tangling.

[0033] In the above solution, to address the problem that the tube output from the tube coil is not straight and the curved tube is difficult to fit into the channel of the damping component, preferably, the damping component includes:

[0034] The base is disposed at the second end of the first arm in a manner that allows it to rotate about the fifth axis;

[0035] The first rotating wheel and the second rotating wheel are respectively disposed on the base to the left and right in a manner that allows them to rotate around their respective central axes that extend vertically and vertically, thus forming a portion of the aforementioned channel. The second rotating wheel can move left and right under the action of the fifth driving member, thus moving relatively closer to or away from the first rotating wheel.

[0036] The upper and lower rotating wheels are distributed in front and behind the first and second rotating wheels. The upper and lower rotating wheels are respectively arranged on the base in a way that they can rotate around their respective central axes that extend to the left and right, forming a part of the channel. The upper rotating wheel can be flipped upward to the left or right of the lower rotating wheel under the action of the sixth driving member.

[0037] The first damping element acts on at least one of the first rotating wheel and the second rotating wheel to limit the rotation of one of the first rotating wheel and the second rotating wheel as the pipe moves.

[0038] The first and second rotating wheels provide damping force on both sides of the tube to tighten it during winding, allowing it to be output in a straight line around the core. The design of the first and second rotating wheels, the upper rotating wheel, and the lower rotating wheel facilitates the placement of bent tubes into the damping assembly. When placing the tube, the fifth drive unit moves the second rotating wheel away from the first rotating wheel, and the sixth drive unit flips the upper rotating wheel upwards to the left or right of the lower rotating wheel. The tube is then placed above the lower rotating wheel, positioned between the first and second rotating wheels. Next, the fifth drive unit moves the second rotating wheel closer to the first rotating wheel, and the sixth drive unit flips the upper rotating wheel downwards to above the lower rotating wheel. This design is convenient for operation.

[0039] Preferably, the first rotating wheel and the second rotating wheel form a wheel group, and there are two wheel groups, located on the front and rear sides of the upper and lower rotating wheels, respectively.

[0040] Furthermore, there are at least two first rotating wheels arranged at intervals in the front-to-back direction, and at least two second rotating wheels arranged at intervals in the front-to-back direction, with each first rotating wheel and second rotating wheel staggered to the left and right.

[0041] There are at least two upper rotating wheels arranged at intervals along the front-to-back direction, and at least two lower rotating wheels arranged at intervals along the front-to-back direction. The upper and lower rotating wheels are staggered vertically.

[0042] Preferably, the base includes:

[0043] Left and right extending slide rails are provided at the second end of the first arm in a manner that allows them to rotate around the fifth axis;

[0044] A connecting seat for mounting the first and second rotating wheels, the upper rotating wheel and the lower rotating wheel is provided on the slide rail and can move left and right along the slide rail.

[0045] In the above embodiments, preferably, the bottom of the base is provided with wheels so that the base can move along the axial direction of the heat exchanger core, and the bottom of the base is provided with guides for constraining the direction of movement of the base.

[0046] Compared with the prior art, the advantages of the present invention are as follows: The present invention places the winding disc horizontally on the base, and the winding disc as a whole can rotate up and down relative to the base. The support arm can also rotate up and down relative to the base. This allows the angle of the winding disc and the support arm to be adjusted in real time during the winding process, so that the tube detached from the winding disc can extend to the upper end of the support arm in a straight line. The extension direction of this straight line corresponds to the tangent of the outer peripheral surface of the heat exchanger core. This allows the tube to be smoothly wound around the outer periphery of the heat exchanger core, avoiding tube knots and jamming, and improving the quality of tube winding. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the tube winding machine according to an embodiment of the present invention;

[0048] Figure 2 for Figure 1 Enlarged diagram of part A in the diagram;

[0049] Figure 3 for Figure 1 Enlarged diagram of part B in the diagram;

[0050] Figure 4 This is a schematic diagram of the tube winding machine from another perspective according to an embodiment of the present invention;

[0051] Figure 5 for Figure 4 Enlarged diagram of part C in the diagram;

[0052] Figure 6 for Figure 4 Enlarged diagram of part D in the diagram;

[0053] Figure 7 for Figure 4 Enlarged diagram of part E in the diagram;

[0054] Figure 8 for Figure 4 Enlarged diagram of part F in the diagram;

[0055] Figure 9 This is a diagram showing the usage state of the tube winding machine according to an embodiment of the present invention;

[0056] Figure 10 This is a cross-sectional view of the support arm and lifting device according to an embodiment of the present invention;

[0057] Figure 11 for Figure 10 Enlarged schematic diagram of part G in the diagram;

[0058] Figure 12 for Figure 10 Enlarged diagram of part H in the diagram;

[0059] Figure 13 This is a cross-sectional view of the coiled tube disk mounted on the base according to an embodiment of the present invention;

[0060] Figure 14 for Figure 13 Enlarged schematic diagram of part I in the diagram;

[0061] Figure 15 This is a schematic diagram of the lifting device according to an embodiment of the present invention;

[0062] Figure 16 for Figure 15 A cross-sectional view of the central lifting device;

[0063] Figure 17 This is a schematic diagram of the lifting device in another state according to an embodiment of the present invention;

[0064] Figure 18 This is a cross-sectional view of the damping assembly installed on the support arm according to an embodiment of the present invention;

[0065] Figure 19 This is a schematic diagram of the damping component according to an embodiment of the present invention;

[0066] Figure 20 for Figure 19 Cross-sectional view of the intermediate damping component;

[0067] Figure 21 This is a top view of an embodiment of the present invention. Detailed Implementation

[0068] like Figures 1-21 As shown, this is a preferred embodiment of a tube winding machine for winding heat exchanger tubes on a heat exchanger core according to the present invention. The tube winding machine includes a base 1, a support arm 2, a winding disc 3, a lifting device 4, and a damping assembly 5.

[0069] like Figure 4 As shown, the bottom of the base 1 is provided with a traveling wheel 11 so that the base 1 can move along the axial direction of the heat exchanger core 7, and the bottom of the base 1 is provided with a guide member 12 for constraining the movement direction of the base 1. In this embodiment, the factory floor is provided with a guide rail extending along the axial direction of the heat exchanger core 7, and the guide member 12 is a guide wheel that can move along the guide rail so that the base 1 can only move along the axial direction of the heat exchanger core 7.

[0070] like Figures 1-12As shown, the support arm 2 extends obliquely upward from the base 1, with the oblique direction being forward. The lower end of the support arm 2 is constrained to the base 1 by means of a first axis 201 extending horizontally, and the upper end of the support arm 2 is a free end used to support the tube 6. The support arm 2 can rotate vertically under the action of the first driving member 23. The support arm 2 can be positioned after extending and retracting along its length, so that the upper end of the support arm 2 can approach the outer peripheral surface 70 of the heat exchanger core 7. Through the aforementioned lifting device 4, the tube 6 is pressed tightly onto the outer peripheral surface 70 of the heat exchanger core 7. In this embodiment, the support arm 2 includes a first arm 21 and a second arm 22. The first end of the first arm 21, as the lower end of the support arm 2, is mounted on the support 13 of the base 1 in a manner that allows it to rotate vertically around the first axis 201. The support 13 is constrained to the base 1 by means of rotation around the eighth axis 131 extending vertically from its center, so that the first arm 21 can also rotate horizontally relative to the base 1, thereby allowing the angle of the first arm 21 to be adjusted according to the helix angle of the tube winding. The second end of the first arm 21 extends forward at an angle. Under the action of the first driving member 23, the first arm 21 can rotate up and down around the first axis 201. The first driving member 23 is a telescopic component such as an electric cylinder, hydraulic cylinder, or pneumatic cylinder. One end of the first arm 23 is rotatably connected to the base 1, and the other end is rotatably connected to the first arm 21, so that the telescopic movement of the first driving member 23 can drive the first arm 21 to rotate up and down. The first end of the second arm 22 is located at the second end of the first arm 21 in a manner that allows it to rotate up and down around the fourth axis 221 that extends left and right. The second end of the second arm 22 is the upper end of the support arm 2. At this time, the second arm 22 adopts a telescopic structure in which the inner arm 22a is inserted into the outer arm 22b and can slide along its length (other telescopic structures can also be used). The inner arm 22a of the second arm 22 can slide along its own length under the drive of the third driving member 24 (the third driving member 24 can be a telescopic component such as an electric cylinder, hydraulic cylinder, or pneumatic cylinder). After retraction and positioning, the extended end of the inner arm 22a becomes the upper end of the second arm. At this time, the overall length of the second arm 22 can be changed as needed with the action of the third drive member 24, and the outer arm 22b of the second arm 22 can also rotate up and down around the fourth axis 221 under the drive of the seventh drive member 25. The seventh drive member 25 is an existing electric cylinder, hydraulic cylinder, pneumatic cylinder or other telescopic component. One end of it is rotatably connected to the first arm 21, and the other end is rotatably connected to the outer arm 22b of the second arm 22, so that the telescopic movement of the seventh drive member can drive the second arm 22 to rotate up and down as a whole.

[0071] like Figures 1 to 9 and Figure 13 and Figure 14The coil 3 is horizontally placed on the base 1 and located behind the support arm 2. The coil 3 has a support portion extending circumferentially around its central axis 301. The support portion is used for the tube 6 to be wound circumferentially around it to form a coil, and the support portion can rotate around the central axis 301 so that the tube 6 forming the coil can detach from the support portion as the support portion rotates and be output forward through the upper end of the support arm 2. At the same time, the center of the coil 3 is constrained to the base 1 in a manner that allows it to rotate up and down around a second axis 302 extending left and right, so that the central axis 301 of the coil 3 can extend vertically or tilted forward and backward. The output end of the second drive member 33 acts on the coil 3 to drive the coil 3 to rotate around the second axis 302 so that the tube 6 detached from the support portion can extend in a straight line to the upper end of the support arm 2, and the direction of extension of this straight line corresponds to the tangent of the outer peripheral surface 70 of the heat exchanger core 7. In this embodiment, the coil 3 includes a connecting plate 31 and a rotating plate 32. The center of the connecting plate 31 is constrained to the base 1 in a manner that allows it to rotate up and down around the second axis 302. The rotating plate 32 has the aforementioned support portion and is rotatably connected to the connecting plate 31. Specifically, the rotating plate 32 has an annular bottom wall 321, an outer side wall 322 extending upward from the outer periphery of the bottom wall 321, and an inner side wall 323 extending upward from the inner periphery of the bottom wall 321. The bottom wall 321 is located on the upper surface of the connecting plate 31. The bottom wall 321, the outer side wall 322, and the inner side wall 323 together form an annular cavity 320 to accommodate the coil. This annular cavity 320 is the aforementioned support portion. To enable the rotating plate 32 to be rotatably constrained to the upper surface of the connecting plate 31 around its central axis 301, in this embodiment, as follows... Figure 13 and Figure 14 As shown, the connecting disk 31 has multiple through holes 310 spaced circumferentially through its own wall thickness. Each through hole 310 contains a wheel 312 that can rotate around its respective central axis 311 (which extends radially along the connecting disk 31). A portion of the circumferential surface of the wheel 312 protrudes relative to the upper surface of the connecting disk 31, supporting the bottom wall 321 of the rotating disk 32, so that the bottom wall 321 can be circumferentially rotatably supported on the circumferential surface of each wheel 312. In this embodiment, two wheels 312 are provided on the same central axis 311, and the two wheels 312 are spaced apart along the length of the central axis 311. The connecting disk 31 has the aforementioned through holes 310 corresponding to the positions of each wheel 312.

[0072] To limit the rotation of the rotating disk 32, a plurality of limiting wheels 34 are provided circumferentially at intervals on the upper surface of the connecting disk 31 corresponding to the inner periphery of the rotating disk 32. Each limiting wheel 34 can rotate around its central limiting shaft 35 (which extends axially along the connecting disk 31 and is connected to the connecting disk 31). Simultaneously, the inner periphery of the bottom wall 321 extends inward to form a flange 324 protruding relative to the inner sidewall 323. The inner periphery of the flange 324 is adjacent to or abuts the circumferential surface of each limiting wheel 34, and a retaining ring 341 protrudes from the circumferential surface of each limiting wheel 34 to constrain the upward movement of the flange 324. This allows each limiting wheel 34 to constrain the radial and axial displacement of the rotating disk 32 without affecting its rotation. When the rotating disk 32 rotates, it rotates along with each limiting wheel 34. To avoid jamming, in this embodiment, the limiting wheels 34 are supported on the outer periphery of the limiting shaft 35 by bearings 36.

[0073] The second driving component 33 is an existing telescopic component such as an electric cylinder, hydraulic cylinder, or pneumatic cylinder. One end of it is rotatably connected to the base 1, and the other end is rotatably connected to the connecting plate 31, so that the telescopic movement of the second driving component 33 can drive the connecting plate 31 to rotate up and down.

[0074] like Figures 1 to 8 ... Figures 10 to 12 , Figures 15 to 17 As shown, the lifting device 4 is located at the upper end of the support arm 2 and includes a support wheel 41, a constant force magnetic spring 42, and a mounting base 43.

[0075] There are four constant force magnetic springs 42 that can extend and retract vertically, and they are arranged at equal intervals along the circumference. Each constant force magnetic spring 42 is existing technology, and its stator 421 extends vertically and is sleeved on the outer periphery of the mover 422. The stators 421 of each constant force magnetic spring 42 are connected by intermediate connecting plates 44. There are two intermediate connecting plates 44, which are respectively set at the upper end and the lower end of the stator 421 of the constant force magnetic spring 42. The intermediate connecting plate located on the upper side is hinged to the upper end of the support arm 2 through a hinge seat 49. Under the drive of the power source 48 (the power source can refer to the design of the second driving component 33 mentioned above, which will not be described in detail here), the hinge seat 49 and the intermediate connecting plate located on the upper side can rotate vertically relative to the upper end of the support arm 2 around the sixth axis 491 that extends horizontally.

[0076] When winding heat exchange tubes on a core, the actual pitch (i.e., the axial distance between two adjacent turns of heat exchange tubes) may differ from the preset pitch due to factors such as core deflection. Since the winding machine's axial travel speed along the core is designed based on the preset pitch, this can lead to the winding machine traveling too fast or too slow, affecting the winding process. Therefore, in this embodiment, a left-right extending base plate 401 is provided between the upper intermediate connecting plate 44 and the hinge seat 49. The upper surface of the base plate 401 is provided with left-right extending guide rails 402. The upper intermediate connecting plate 44 is mounted on the base plate 401 and can move left and right along the guide rails 402. Furthermore, left-right extending elastic bodies 403 (existing springs) are provided on the base plate 401 corresponding to the left and right sides of the upper intermediate connecting plate 44, ensuring that the upper intermediate connecting plate 44 always tends to move to the middle position of the base plate 401. Meanwhile, the substrate 401 is mounted on the hinge seat 49, and the center of the substrate 401 is constrained to the hinge seat 49 in a manner that allows it to rotate around the seventh axis 492 extending vertically. When the support arm 2 rotates a certain angle to the left or right around the eighth axis 131 according to the helix angle of the winding tube, the hinge seat 49 is rotated vertically around the sixth axis 491 to make the substrate 401 horizontal. Then, the substrate 401 is rotated around the seventh axis 492 and positioned (positioning can be achieved using existing positioning methods such as pin positioning) to keep the substrate 401 in a horizontally extending axis parallel to the core 7. Then, according to the helix angle of the winding tube, the support wheel 41 is rotated around the third axis 431 as described below. Specifically, as follows... Figure 21 As shown. When the winding machine travels too fast, the lifting device 4 will overcome the elastic force of the left and right elastic bodies 403 and undergo a small displacement relative to the substrate 401 (the displacement direction is opposite to the traveling direction of the winding machine), thus lagging behind the traveling direction of the winding machine. When the winding machine travels too slowly, the lifting device 4 will overcome the elastic force of the left and right elastic bodies 403 and undergo a small displacement relative to the substrate 401 (the displacement direction is the same as the traveling direction of the winding machine), thus moving forward relative to the traveling direction of the winding machine.

[0077] Two intermediate connecting plates are connected by four vertically extending tie rods 47, each located between the stators of its corresponding two adjacent constant force magnetic springs. The bottom of the mover 422 of each constant force magnetic spring 42 is connected by a lower connecting plate 46, and the top of the mover 422 of each constant force magnetic spring 42 is connected by an upper connecting plate 45. The mounting base 43 for mounting the support wheel 41 is located above the upper connecting plate 45 in a manner that allows it to rotate about a third vertically extending axis 431 at its center. In this embodiment, the mounting base 43 is connected to a downwardly extending pivot 430. The pivot 430 passes through the first circular hole 451 of the upper connecting plate 45 and the second circular hole 441 of the intermediate connecting plate 44, and is located within the circumference formed by the constant force magnetic springs 42. The central axis of the pivot 430 is the aforementioned third axis 431, which passes through the center of the first circular hole 451 and the second circular hole 441, so that the mounting base 43 is rotatably connected to the upper connecting plate 45 via the pivot 430. The support wheel 41 is rotatably connected to the mounting base 43 via a pivot 410 extending left and right from its center, and the support wheel 41 has a first circumferential wall 411 surrounding the outer circumference of the pivot 410 for supporting the tube 6. Under the action of the constant force magnetic springs 42, the support wheel 41 can float up and down relative to the upper end of the support arm 2, and always has an upward floating tendency under the action of the constant force magnetic springs 42, so that the support wheel 41 can press the tube 6 upward and press it tightly against the outer circumferential surface 70 of the heat exchanger core 7. Moreover, the constant force magnetic springs 42 can provide the support wheel 41 with a constant upward lifting force.

[0078] like Figures 1-12 , Figures 18-20 As shown, the damping component 5 is located at the second end of the first arm 21. The damping component 5 has a channel 50 extending forward and backward for the pipe 6 to pass through. The damping component 5 is arranged to generate a damping force when the pipe 6 passes through the channel 50 to limit the forward movement of the pipe 6. The damping component 5 can be rotated and positioned around the fifth axis 501 extending left and right under the drive of the fourth drive member 59, so that the extension direction of the channel 50 inside the damping component 5 is consistent with the straight extension direction of the pipe 6, thereby allowing the pipe 6, which is detached from the bearing part, to extend to the upper end of the support arm 2 in a straight line after passing through the channel 50.

[0079] In this embodiment, the damping assembly 5 includes a base, a first rotating wheel 51 and a second rotating wheel 52, an upper rotating wheel 54 and a lower rotating wheel 55, a first damping element, and a second damping element. The base is disposed at the second end of the first arm 21 in a manner that allows it to rotate around the fifth axis 501. Specifically, the base includes a left-right extending slide rail 57 and a connecting seat 58. The slide rail 57 is disposed at the second end of the first arm 21 in a manner that allows it to rotate around the fifth axis 501. The fourth driving member 59 is a conventional telescopic member such as an electric cylinder, hydraulic cylinder, or pneumatic cylinder. One end of the fourth driving member 59 is rotatably connected to the second end of the first arm 21, and the other end is rotatably connected to the slide rail 57, so that the telescopic movement of the fourth driving member 59 can drive the slide rail 57 to rotate up and down. The lower part of the connecting seat 58 is disposed on the slide rail 57 and can move left and right along the slide rail 57. The upper part of the connecting seat 58 can rotate relative to the lower part of the connecting seat 58, and the rotation axis 581 extends up and down and is perpendicular to the slide rail 57. The upper part of the connecting seat 58 is used to install the first rotating wheel 51, the second rotating wheel 52, the upper rotating wheel 54, and the lower rotating wheel 55.

[0080] Specifically, the first rotating wheel 51 and the second rotating wheel 52 are respectively positioned on the upper part of the connecting seat 58, forming a portion of the aforementioned channel 50, so as to be able to rotate around their respective central axes extending vertically upwards. The second rotating wheel 52, under the action of the fifth driving member 53, can move left and right, relatively closer to or further away from the first rotating wheel 51. The fifth driving member 53 can be an existing quick-clamping device with a handle and transmission mechanism, driving the second rotating wheel 52 to move left and right through the rotation of the handle and the transmission mechanism. The fifth driving member 53 can also be an existing telescopic component such as an electric cylinder, hydraulic cylinder, or pneumatic cylinder. The first damping component is existing technology and acts on at least one of the first rotating wheel 51 and the second rotating wheel 52 to limit the rotation of one of the first rotating wheel 51 or the second rotating wheel 52 as the tube 6 moves.

[0081] The upper rotating wheel 54 and the lower rotating wheel 55, the first rotating wheel 51 and the second rotating wheel 52 are distributed front and rear, and the upper rotating wheel 54 and the lower rotating wheel 55 are respectively arranged one above the other on the upper part of the connecting seat 58 to form a part of the aforementioned channel 50, in a manner that allows them to rotate around their respective central axes extending left and right. Under the action of the sixth driving member 56, the upper rotating wheel 54 can be flipped upwards to the left or right of the lower rotating wheel 55. The sixth driving member 56 can be an existing quick clamp with a handle and a transmission mechanism. The upper rotating wheel 54 is driven to flip up and down by the rotation of the handle and the transmission mechanism (existing quick clamps are standard parts, and their models and functions are different. Some models of quick clamps can drive the component to move linearly back and forth, while some models of quick clamps can drive the component to rotate. The specific model is selected according to the needs). The sixth driving member 56 can also be an existing telescopic component such as an electric cylinder, hydraulic cylinder, or pneumatic cylinder, or an existing driving mechanism such as a motor or gear set. The second damping element is existing technology and acts on at least one of the upper rotating wheel 54 and the lower rotating wheel 55 to limit the rotation of one of the upper rotating wheel 54 and the lower rotating wheel 55 as the tube 6 moves. In this embodiment, the second damping element can also be omitted, with only the first damping element providing damping. The design of the second damping element in this embodiment allows it to cooperate with the first damping element to effectively tighten the tube 6 during winding.

[0082] In this embodiment, a wheel set 510 is formed by the first rotating wheel 51 and the second rotating wheel 52. There are two sets of wheel sets 510, located on the front and rear sides of the upper and lower rotating wheels, respectively. Each wheel set 510 contains three first rotating wheels 51 spaced apart in the front-rear direction, and two second rotating wheels 52 spaced apart in the front-rear direction. The first rotating wheels 51 and second rotating wheels 52 are staggered horizontally. The upper rotating wheels 54 have two spaced apart in the front-rear direction, and the lower rotating wheels 55 have three spaced apart in the front-rear direction. The upper rotating wheels 54 and lower rotating wheels 55 are staggered vertically.

[0083] When winding the tube, such as Figure 9As shown, the height of the coiled tube 3 is lower than the height of the damping assembly 5, which is also lower than the height of the lifting device 4. This allows the tube 6 output from the coiled tube 3 to pass through the damping assembly 5 in a straight line and extend to the support wheel 41 of the lifting device 4. This straight line extends upward from back to front and corresponds to the tangent of the outer peripheral surface 70 of the heat exchanger core 7, allowing the tube to be wound around the outer periphery of the heat exchanger core 7 in the tangent of the outer peripheral surface 70. As the tube is wound layer by layer around the outer periphery of the heat exchanger core 7 from the inside out, the outer diameter of the heat exchanger core 7 gradually increases. During this process, the up-and-down rotation of the support arm 2, the extension and retraction of the second arm 22, the up-and-down rotation of the coiled tube 3, and the up-and-down rotation of the damping assembly 5 can all ensure that the tube 6 output from the coiled tube 3 always passes through the damping assembly 5 in a straight line and extends to the support wheel 41 of the lifting device 4, with this straight line corresponding to the tangent of the outer peripheral surface 70 of the heat exchanger core 7.

[0084] Meanwhile, in this embodiment, as Figure 21 As shown, depending on the helix angle of the winding tube, the support arm 2 can be rotated left or right by a certain angle around the eighth axis 131, and the substrate 401 can be rotated and positioned around the seventh axis 492 to maintain the substrate 401 extending laterally and parallel to the axial direction of the core 7. Then, depending on the helix angle of the winding tube, the support wheel 41 can be rotated around the third axis 431 to match the helix angle. The upper part of the connecting seat 58 is rotated relative to the lower part of the connecting seat 58 to tilt the channel 50 of the damping assembly 5 from back to front to the left or right. In this way, the tube 6 output from the winding disc 3 always extends through the damping assembly 5 in a straight line to the support wheel 41 of the lifting device 4. Figure 21 As shown, the tube 6 is tangentially output from the winding disc 3 and extends in a straight line to the support wheel 41 of the lifting device 4. The extension direction of the tube matches the helix angle of the winding disc.

[0085] As the heat exchange tubes are wound layer by layer from the inside out, the tubes can be adjusted by extending and retracting the support arm 2, rotating the support arm 2 up and down relative to the base 1, rotating the tube winding disc 3 up and down relative to the base 1, rotating the lifting device 4 up and down relative to the hinge seat 49, and rotating the damping assembly 5 up and down relative to the support arm 2. This allows the tube 6 to be output tangentially from the tube winding disc 3, pass through the damping assembly 5 in a straight line to the support wheel 41 of the lifting device 4, and then wound tangentially to the outer periphery of the core.

[0086] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A tube winding machine for winding heat exchanger tubes on a heat exchanger core, comprising: Base (1); The support arm (2) extends upward at an angle from the base (1), with the angle direction being forward. The lower end of the support arm (2) is constrained to the base (1) with a first axis (201) extending left and right, and the upper end of the support arm (2) is a free end used to support the tube (6). The support arm (2) can rotate up and down under the action of the first driving member (23). A coil (3) is provided on the base (1) and located on the rear side of the support arm (2). The coil (3) has a bearing portion extending circumferentially around its central axis (301). The bearing portion is used for the tube (6) to be wound circumferentially on it to form a coil. The bearing portion can rotate around the central axis (301) so that the tube (6) forming the coil can be separated from the bearing portion as the bearing portion rotates and output forward through the upper end of the support arm (2). Its features are: The winding disc (3) is placed horizontally on the base (1), and the center of the winding disc (3) is constrained on the base (1) in a way that it can rotate up and down around the second axis (302) that extends left and right, so that the central axis (301) of the winding disc (3) can extend vertically or extend forward and backward at an angle. The output end of the second driving member (33) acts on the coiled tube disc (3) to drive the coiled tube disc (3) to rotate around the second axis (302) until the tube (6) detached from the bearing part can extend in a straight line to the upper end of the support arm (2), and the extension direction of the straight line corresponds to the tangent of the outer peripheral surface (70) of the heat exchanger core (7).

2. The tube winding machine according to claim 1, characterized in that: The winding disc (3) includes a connecting disc (31) and a rotating disc (32). The center of the connecting disc (31) is constrained on the base (1) in a manner that allows it to rotate up and down around the second axis (302). The rotating disc (32) has the aforementioned bearing portion and is rotatably connected to the connecting disc (31).

3. The tube winding machine according to claim 2, characterized in that: The rotating disk (32) has an annular bottom wall (321), an outer side wall (322) extending upward from the outer periphery of the bottom wall (321), and an inner side wall (323) extending upward from the inner periphery of the bottom wall (321). The bottom wall (321) is located on the upper surface of the connecting disk (31). The bottom wall (321), the outer side wall (322), and the inner side wall (323) together form an annular cavity (320) to accommodate the coil. This annular cavity (320) is the aforementioned support portion.

4. The tube winding machine according to claim 1, characterized in that: The support arm (2) can be extended and retracted along its length and positioned so that the upper end of the support arm (2) can be close to the outer peripheral surface (70) of the heat exchanger core (7) to press the tube (6) onto the outer peripheral surface (70) of the heat exchanger core (7).

5. The tube winding machine according to claim 4, characterized in that: The upper end of the support arm (2) is provided with an elastic mechanism. The support wheel (41) is rotatably connected to the elastic mechanism through the rotating shaft (410) extending left and right in its center. The support wheel (41) has a first circumferential wall (411) surrounding the outer periphery of the rotating shaft (410) for supporting the tube (6). The support wheel (41) always has an upward floating tendency under the action of the elastic mechanism, so that the support wheel (41) can press the tube (6) upward against the outer circumferential surface (70) of the heat exchanger core (7).

6. The tube winding machine according to claim 5, characterized in that: The elastic mechanism is a constant force magnetic spring (42) that can extend and retract vertically. The stator (421) of the constant force magnetic spring (42) is connected to the upper end of the support arm (2). The top of the mover (422) of the constant force magnetic spring (42) is provided with a mounting seat (43) for mounting the support wheel (41).

7. The tube winding machine according to claim 6, characterized in that: The mounting base (43) is mounted on the top of the mover (422) of the constant force magnetic spring (42) in a manner that allows it to rotate about a third axis (431) extending vertically from its center.

8. The tube winding machine according to claim 7, characterized in that: There are multiple constant force magnetic springs (42) and they are arranged at intervals along the circumference. The stator (421) of each constant force magnetic spring (42) is connected through an intermediate connecting plate (44), and the intermediate connecting plate (44) is connected to the upper end of the support arm (2). The bottom of the mover (422) of each constant force magnetic spring (42) is connected through a lower connecting plate (46), and the top of the mover (422) of each constant force magnetic spring (42) is connected through an upper connecting plate (45). The mounting base (43) is located above the upper connecting plate (45), and the mounting base (43) is connected to a downwardly extending pivot (430). The pivot (430) passes through the first circular hole (451) of the upper connecting plate (45) and the second circular hole (441) of the intermediate connecting plate (44), and is located within the circumference formed by each constant force magnetic spring (42). The central axis of the pivot (430) is the aforementioned third axis (431), and passes through the center of the first circular hole (451) and the second circular hole (441).

9. The tube winding machine according to claim 1, characterized in that: The support arm (2) includes: The first arm (21) has its first end mounted on the base (1) in a manner that allows it to rotate up and down around the first axis (201), and its second end extends forward at an angle. The second arm (22) is located at the second end of the first arm (21) in such a way that it can rotate up and down around the fourth axis (221) that extends left and right. The second end is the upper end of the support arm (2). The second arm (22) can be positioned after extending and retracting along its own length direction under the drive of the third drive member (24).

10. The tube winding machine according to claim 9, characterized in that: It also includes a damping assembly (5) located at the second end of the first arm (21). The damping assembly (5) has a channel (50) extending forward and backward for the tube (6) to pass through. The damping assembly (5) is arranged to generate a damping force when the tube (6) passes through the channel (50) to limit the forward movement of the tube (6). The damping assembly (5) can be rotated and positioned around the fifth axis (501) extending left and right under the drive of the fourth drive member (59) so that the extension direction of the channel (50) inside the damping assembly (5) is consistent with the straight extension direction of the tube (6), thereby allowing the tube (6) detached from the bearing part to pass through the channel (50) in a straight line and extend to the upper end of the support arm (2).

11. The tube winding machine according to claim 10, characterized in that: The damping component (5) includes: The base is disposed at the second end of the first arm (21) in a manner that allows it to rotate about the fifth axis (501); The first rotating wheel (51) and the second rotating wheel (52) are respectively arranged on the base to form a part of the channel (50) in a manner that allows them to rotate around their respective central axes that extend vertically up and down. The second rotating wheel (52) can move left and right under the action of the fifth driving member (53) and move relatively closer to or away from the first rotating wheel (51). The upper rotating wheel (54) and the lower rotating wheel (55) are distributed in front and behind the first and second rotating wheels. The upper and lower rotating wheels are respectively arranged on the base in a way that they can rotate around the central axis that extends left and right around their respective centers to form a part of the channel (50). The upper rotating wheel (54) can be flipped upward to the left or right side of the lower rotating wheel (55) under the action of the sixth driving member (56). The first damping element acts on at least one of the first rotating wheel (51) and the second rotating wheel (52) to limit the rotation of one of the first rotating wheel (51) and the second rotating wheel (52) as the tube (6) moves.

12. The tube winding machine according to claim 11, characterized in that: The first rotating wheel (51) and the second rotating wheel (52) form a wheel set (510). There are two sets of wheel sets (510), which are located on the front and rear sides of the upper and lower rotating wheels, respectively.

13. The tube winding machine according to claim 11, characterized in that: There are at least two first rotating wheels (51) arranged at intervals in the front-back direction, and at least two second rotating wheels (52) arranged at intervals in the front-back direction. The first rotating wheels (51) and the second rotating wheels (52) are staggered to the left and right. There are at least two upper rotating wheels (54) arranged at intervals in the front-to-back direction, and at least two lower rotating wheels (55) arranged at intervals in the front-to-back direction. The upper rotating wheels (54) and the lower rotating wheels (55) are staggered vertically.

14. The tube winding machine according to claim 11, characterized in that: The base includes: Left and right extended slide rails (57) are provided at the second end of the first arm (21) in such a way that they can rotate around the fifth axis (501); A connecting seat (58) for mounting the first rotating wheel (51), the second rotating wheel (52), the upper rotating wheel (54), and the lower rotating wheel (55) is provided on the slide rail (57) and can move left and right along the slide rail (57).

15. The tube winding machine according to any one of claims 1 to 8, characterized in that: The base (1) is provided with a walking wheel (11) at the bottom so that the base (1) can move along the axial direction of the heat exchanger core (7), and the base (1) is provided with a guide (12) at the bottom for constraining the movement direction of the base (1).

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