A magnetic drive heat exchange tube inside and outside surface collaborative rolling device and control method

Abstract

The application provides a magnetic driving heat exchange pipe inner and outer surface cooperative rolling device and a control method. The magnetic coupling driving mechanism is used to realize the inner and outer surface cooperative rolling and strengthening of the heat exchange pipe. The electromagnetic reversing mechanism is used to drive the reversing spline to switch the torque transmission path, so that the inner wall rolling mechanism can be converted between the rolling state and the rolling force adjusting state. When the inner wall rolling mechanism is stuck, the rolling force can be adjusted on line without withdrawing the heat exchange pipe. After the adjustment is completed, the rolling strengthening operation can be restored, and the continuity of the strengthening operation is improved. The magnetic coupling driving mechanism is improved. A plurality of groups of staggered magnetic pole coupling units are arranged along the axial direction. The axial friction force borne by the inner wall rolling mechanism is balanced while the torque is transmitted, the stability of the inner wall rolling mechanism operation is improved, and the accuracy of the rolling position is ensured.

Description

Technical Field

[0001] This invention belongs to the field of circular tube processing technology, specifically relating to a magnetically driven device and control method for coordinating the inner and outer surfaces of a heat exchange tube. Background Technology

[0002] Heat exchanger tubes are widely used in heat exchange equipment in nuclear power, petrochemical, and power plant boilers. They operate under complex conditions such as high temperature, high pressure, and corrosive media for extended periods, making them prone to fatigue damage and stress corrosion cracking, which seriously affect the safety and service life of the heat exchange equipment. Mechanical compaction, as a typical surface plastic deformation strengthening technique, applies rolling loads to the material surface, altering the surface microstructure and introducing residual compressive stress to form a surface reinforced layer. This improves the material's fatigue performance and resistance to stress corrosion cracking. Therefore, mechanical compaction strengthening has promising applications in improving the surface properties of metal components.

[0003] However, heat exchange tubes typically have structural characteristics such as a large length-to-diameter ratio, small diameter, and narrow internal space, making conventional compaction strengthening devices difficult to directly apply to the internal wall strengthening and online operation scenarios of heat exchange tubes. To achieve online coordinated compaction strengthening of the inner and outer surfaces of heat exchange tubes, it is necessary to solve not only the driving and arrangement problems of the compaction device in the confined space, but also to address key technical issues such as online adjustment of compaction pressure during the strengthening process, continuous operation under conditions of jamming of the internal compaction device, and real-time sensing and feedback control of the strengthening status.

[0004] Therefore, in response to the application requirements and technical challenges of online co-compaction compaction strengthening of heat exchanger tubes, it is urgent to develop a device for co-compaction compaction strengthening of the inner and outer surfaces of heat exchanger tubes in the online strengthening scenario. This device should enable the co-compaction strengthening of the inner and outer surfaces of the heat exchanger tubes, and have the ability to adjust the compaction pressure online, operate continuously under jamming conditions, and detect and control the strengthening status in real time, thereby improving the continuity, stability and automation level of the online strengthening process of heat exchanger tubes. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a magnetically driven device and control method for the coordinated compaction of the inner and outer surfaces of heat exchange tubes. By combining electromagnetic coupling technology with traditional compaction processes, this invention solves the technical problem that conventional compaction devices cannot perform coordinated compaction and strengthening of the inner and outer walls of heat exchange tubes, and enables online control of the compaction pressure.

[0006] The present invention provides a magnetically driven heat exchange tube inner and outer surface co-compacting device, comprising a magnetic coupling drive mechanism 1, an outer wall compaction mechanism 2, an inner wall compaction mechanism 3, an electromagnetic reversing mechanism 4, and an inner wall compaction pressure adjustment mechanism 5; The magnetic coupling drive mechanism 1 includes an outer rotor and an inner rotor arranged coaxially. The outer rotor includes an annular outer back iron 1-1 and outer permanent magnets 1-2 uniformly arranged along the inner circumference of the outer back iron 1-1. The inner rotor includes an annular inner back iron 1-3 and inner permanent magnets 1-4 uniformly arranged along the outer circumference of the inner back iron 1-3. When the outer rotor rotates in a circular motion, the inner permanent magnets 1-4 and the outer permanent magnets 1-2 achieve non-contact torque transmission through magnetic field coupling. The gap between the outer rotor and the inner rotor allows the heat exchange tube 7 to pass through. The outer wall rolling mechanism 2 is coaxially arranged and fixedly connected with the outer rotor. When the external power device 8 drives the outer wall rolling mechanism 2 or the outer rotor to rotate, the outer wall rolling mechanism 2 and the outer rotor rotate synchronously. The outer wall rolling head 2-1 on the outer wall rolling mechanism 2 rolls and strengthens the outer wall of the heat exchange tube. At the same time, the inner rotor of the magnetic coupling drive mechanism 1 can rotate synchronously under the drive of the magnetic field coupling. The inner wall rolling mechanism 3 is driven to rotate by the inner rotor of the magnetic coupling drive mechanism 1. The inner wall rolling head 3-1 on the inner wall rolling mechanism 3 is installed on the inner rolling mounting plate 3-2 and rolls and strengthens the inner wall of the heat exchange tube. The electromagnetic commutation mechanism 4 includes a sleeve 4-1, an excitation coil 4-2, a stationary iron core 4-3, a return spring 4-4, a moving iron core 4-5, and a commutation spline 4-6. The excitation coil 4-2, stationary iron core 4-3, return spring 4-4, moving iron core 4-5, and commutation spline 4-6 are all disposed inside the sleeve 4-1. The moving iron core 4-5 and the commutation spline 4-6 are fixedly connected to form a commutation actuation assembly. The commutation spline 4-6 is located at the end of the moving iron core 4-5 and can move synchronously with the moving iron core 4-5 along the axial direction of the sleeve 4-1. The return spring 4-4 ​​is disposed between the moving iron core 4-5 and the stationary iron core 4-3 to provide axial return force to the moving iron core 4-5. The stationary iron core 4-3 is fixedly installed inside the sleeve 4-1, and the sleeve 4-1 is fixedly connected to the inner wall rolling mechanism 3. The inner wall rolling pressure adjustment mechanism 5 includes an adjusting screw shaft 5-1, a threaded adjusting section 5-2 disposed on the adjusting screw shaft 5-1, a conical adjusting slider 5-3, a radial adjusting block 5-4, and an inner wall disc spring assembly 5-5; the adjusting screw shaft 5-1 can mesh with the reversing spline 4-6 to receive the rotational power transmitted by the magnetic coupling drive mechanism 1; the threaded adjusting section 5-2 is threadedly engaged with the conical adjusting slider 5-3 to convert the rotational motion of the adjusting screw shaft 5-1 into the axial movement of the conical adjusting slider 5-3; When the excitation coil 4-2 is de-energized, the moving iron core 4-5 maintains its initial position under the action of the return spring 4-4, and the reversing spline 4-6 engages with the sleeve 4-1 to form a torque transmission connection; when the inner rotor of the magnetic coupling drive mechanism 1 rotates, it drives the sleeve 4-1 to rotate synchronously through the reversing spline 4-6. Since the sleeve 4-1 is fixedly connected to the inner wall rolling mechanism 3, it drives the inner wall rolling mechanism 3 to rotate synchronously, thereby achieving coordinated rolling and strengthening of the inner and outer surfaces of the heat exchange tube; When the excitation coil 4-2 is energized, it generates electromagnetic attraction, driving the moving iron core 4-5 to move axially and overcome the spring force of the return spring 4-4. This causes the reversing spline 4-6 to disengage from the sleeve 4-1 and engage with the adjusting screw shaft 5-1 to form a torque transmission connection. At this time, the inner rotor of the magnetic coupling drive mechanism 1 drives the adjusting screw shaft 5-1 to rotate through the reversing spline 4-6. The threaded adjusting section 5-2 on the adjusting screw shaft 5-1 engages with the tapered adjusting slider 5-3, causing the tapered adjusting section 5-2 to rotate. The section slider 5-3 moves axially; the conical adjusting slider 5-3 and the radial adjusting block 5-4 form a wedge-shaped fit relationship. The axial movement of the conical adjusting slider 5-3 is converted into the radial movement of the radial adjusting block 5-4 through the wedge-shaped fit, thereby changing the pre-compression of the inner wall disc spring assembly 5-5; the inner wall disc spring assembly 5-5 is connected to the inner wall rolling head 3-1. By adjusting the pre-compression of the inner wall disc spring assembly 5-5, the rolling pressure of the inner wall rolling head 3-1 on the inner wall of the heat exchange tube can be adjusted.

[0007] Furthermore, in the magnetic coupling drive mechanism 1, the outer permanent magnet 1-2 and the inner permanent magnet 1-4 located in the same axial section constitute a set of magnetic coupling units. The magnetic coupling drive mechanism 1 includes multiple sets of magnetic coupling units, which are arranged sequentially along the axial direction. Adjacent magnetic coupling units adopt an alternating magnetic pole arrangement, and there is no rotation angle deviation between the symmetrical center lines of each set of magnetic coupling units.

[0008] Furthermore, the magnetic coupling drive mechanism 1 includes 4 sets of magnetic coupling units.

[0009] Furthermore, the outer wall rolling mechanism 2 may also include an outer wall disc spring assembly 2-2 and a pre-tightening adjusting screw 2-3. The outer rolling mounting plate 2-4 on the outer wall rolling mechanism 2 is provided with multiple sets of mounting holes evenly distributed along the circumference. Each mounting hole is equipped with an outer wall rolling unit consisting of an outer wall rolling head 2-1, an outer wall disc spring assembly 2-2 and a pre-tightening adjusting screw 2-3. The pre-tightening adjusting screw 2-3 is used to adjust the pre-compression amount of the outer wall disc spring assembly 2-2 to change the rolling pressure of the outer wall rolling head 2-1 acting on the outer wall of the heat exchange tube.

[0010] Furthermore, the magnetically driven heat exchanger tube inner and outer surface co-compacting device may also include a state detection and control mechanism 6. This mechanism includes a control module 6-1, an outer wall load sensor 6-2, an inner wall load sensor 6-3, and a centrifugal inertial switch 6-4. The outer wall load sensor 6-2 is used to detect the rolling pressure of the corresponding outer wall compaction head 2-1 in real time. The inner wall load sensor 6-3 is used to detect the rolling pressure of the corresponding inner wall compaction head 3-1 in real time. The centrifugal inertial switch 6-4 is used to detect the rotational operating state of the inner wall compaction mechanism. The control module 6-1 is electrically connected to the outer wall load sensor 6-2, the inner wall load sensor 6-3, the centrifugal inertial switch 6-4, and the electromagnetic reversing mechanism 4. It provides power to each detection and execution unit, collects, processes, and judges the detection signals, and identifies and controls the operating state of the inner wall compaction mechanism.

[0011] On the other hand, the present invention also provides a control method for a magnetically driven heat exchange tube inner and outer surface co-compacting device, comprising the following steps: S1. Arrange the compaction strengthening device on the heat exchange tube production line, and transport the heat exchange tubes to the compaction station along the production line; set the initial compaction pressure of the outer wall compaction mechanism and the inner wall compaction mechanism respectively. S2. The outer wall rolling mechanism and the outer rotor are driven to rotate by an external power device. The outer rotor drives the inner rotor to rotate through magnetic field coupling, so that the inner wall rolling mechanism and the outer wall rolling mechanism rotate synchronously, and the inner and outer surfaces of the heat exchange tube are synergistically rolled and strengthened. S3. Real-time identification and judgment of the operating status of the entire compaction device; S4. When the inner wall rolling pressure of the inner wall rolling mechanism is detected to be within the set range and the inner wall rolling mechanism is in normal operating condition, the inner wall rolling mechanism is kept in the rolling working state to continuously carry out the coordinated rolling strengthening of the inner and outer surfaces of the heat exchange tube. S5. When the inner wall rolling pressure of the inner wall rolling mechanism is detected to exceed the set range, or when the inner wall rolling mechanism is stuck or stops, the electromagnetic reversing mechanism is energized to connect the reversing spline to the adjusting screw shaft, and the torque output by the magnetic coupling drive mechanism drives the inner wall rolling pressure adjustment mechanism to adjust the inner wall rolling pressure online. S6. After the inner wall rolling pressure is adjusted, the electromagnetic reversing mechanism is de-energized and reset, so that the reversing spline resumes engagement with the sleeve, allowing the inner rotor to re-establish torque transmission connection with the inner wall rolling mechanism, restoring the rolling working state of the inner wall rolling mechanism, and continuing the coordinated rolling strengthening of the inner and outer surfaces of the heat exchange tube. S7. Repeat steps S3 to S6 until the online collaborative compaction and strengthening operation of the entire length of the heat exchange tube is completed.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: (1) In view of the characteristics of heat exchange tubes such as large length-to-diameter ratio, narrow internal space and difficulty in online strengthening, this invention proposes a device for synergistic rolling strengthening of inner and outer surfaces suitable for heat exchange tube production line, which realizes the synchronous strengthening of inner and outer surfaces of heat exchange tubes, which is conducive to improving the surface integrity of inner and outer surfaces of heat exchange tubes at the same time, and improving their fatigue performance and resistance to stress corrosion cracking.

[0013] (2) The present invention adopts a magnetic coupling drive mechanism, which realizes non-contact torque transmission through the magnetic field coupling between the inner and outer rotors. Under the condition that there is no need to mechanically penetrate the heat exchange tube wall, the inner wall rolling mechanism and the outer wall rolling mechanism are driven to rotate synchronously, which solves the problem of driving and arranging the inner wall rolling device under the condition of narrow tube space. At the same time, by setting multiple sets of staggered magnetic pole coupling units along the axial direction, the axial friction force on the inner wall rolling mechanism is balanced while transmitting torque, which improves the stability of the inner wall rolling mechanism and ensures the accuracy of the rolling position.

[0014] (3) The present invention drives the reversing spline to switch the torque transmission path through the electromagnetic reversing mechanism, thereby realizing the switching between the inner wall rolling mechanism in the rolling working state and the rolling pressure adjustment state. This allows the inner wall rolling mechanism to complete the online adjustment of the rolling pressure without exiting the heat exchange tube when jamming occurs, and can resume the rolling strengthening operation after the adjustment is completed, thus improving the continuity of the online strengthening process.

[0015] (4) The present invention utilizes a load sensor and a centrifugal inertial switch to detect the rolling pressure and the operating status of the inner wall rolling mechanism in real time. Combined with the control module, the detection signal is collected, processed and the status is identified. A feedback control mechanism based on the dual parameter detection of rolling pressure and working status is constructed, realizing the self-detection and self-feedback control of the operating status of the inner wall rolling mechanism, and improving the stability and automation level of the device.

[0016] (5) The present invention adopts a rolling pressure adjustment mechanism that combines screw and slider, wedge fit and disc spring pre-tightening, which can realize online adjustment of internal rolling pressure to adapt to the rolling pressure requirements of different specifications of heat exchange tubes and different strengthening processes, thereby improving the adaptability of the device and the flexibility of the process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale. Obviously, the drawings described below are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0018] Figure 1 This is a layout diagram of the magnetically driven heat exchanger tube inner and outer surface co-compacting device of the present invention in a production line. Figure 2 This is an exploded view of the magnetically driven heat exchanger tube inner and outer surface co-compacting device of the present invention. Figure 3 This is a full sectional view of the magnetically driven heat exchanger tube inner and outer surface co-compacting device of the present invention. Figure 4 Diagram of a magnetic coupling drive device and its permanent magnet pole arrangement. Figure 5 This is a partial cross-sectional schematic diagram of the electromagnetic reversing mechanism, showing the position of the reversing spline in both the working and rolling pressure adjustment states. Figure 6 This is a partial cross-sectional schematic diagram of the inner wall rolling pressure adjustment mechanism and the condition detection and control mechanism. Figure 7 Assembly drawing of the electromagnetic reversing mechanism, the inner wall rolling pressure adjustment mechanism, the inner wall rolling mechanism, and the condition detection and control mechanism. Figure 8 Cross-sectional diagram showing the distribution of the compactor heads of the internal and external compaction devices. Figure 9 The magnetic flux density distribution diagram of the magnetic coupling drive device using four sets of magnetic coupling units is shown. Figure 10 The relationship between the torque provided by the magnetic coupling drive and the rotation angle of the inner and outer rotors when using different sets of magnetic coupling units. Figure 11 The relationship between the axial force provided by the magnetic coupling drive device and the axial deviation of the inner and outer rotors when using different sets of magnetic coupling units. Among them: 1-Magnetic coupling drive mechanism, 2-Outer wall rolling mechanism, 3-Inner wall rolling mechanism, 4-Electromagnetic reversing mechanism, 5-Inner wall rolling pressure adjustment mechanism, 6-State detection and control mechanism, 7-Heat exchange tube, 8-External power unit, 9-Production line conveying device; 1-1-Outer back iron, 1-2-Outer permanent magnet, 1-3-Inner back iron, 1-4-Inner permanent magnet; 2-1-Outer wall rolling head, 2-2-Outer wall disc spring assembly, 2-3-Preload adjusting screw, 2-4-Outer rolling mounting plate, 2-5-Pulley, 2-6-Bearing mounting part, 2- 7-Pin; 3-1-Inner wall compaction head, 3-2-Inner compaction mounting plate; 4-1-Sleeve, 4-2-Excitation coil, 4-3-Stationary iron core, 4-4-Reset spring, 4-5-Moving iron core, 4-6-Reversing spline, 4-7-Housing, 4-8-End cover; 5-1-Adjusting screw shaft, 5-2-Threaded adjustment section, 5-3-Conical adjusting slider, 5-4-Radial adjusting block, 5-5-Inner wall disc spring assembly; 6-1-Control module, 6-2-Outer wall load sensor, 6-3-Inner wall load sensor, 6-4-Centrifugal inertial switch. Detailed Implementation

[0019] The embodiments of the technical solution of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and the foregoing description of the accompanying drawings are intended to cover non-exclusive inclusion.

[0020] Example 1 Figure 1 This is a layout diagram of the magnetically driven heat exchanger tube inner and outer surface co-compacting rolling device of the present invention in the production line. The magnetically driven heat exchanger tube inner and outer surface co-compacting rolling device provided by the present invention is arranged on the heat exchanger tube production line. The heat exchanger tube is transported to the rolling station by the production line conveyor (9). The magnetically driven heat exchanger tube inner and outer surface co-compacting rolling device begins to co-compact the inner and outer surfaces of the heat exchanger tube.

[0021] like Figure 2 The exploded view shown is of a magnetically driven heat exchanger tube inner and outer surface co-compacting device. The magnetically driven heat exchanger tube inner and outer surface co-compacting device of this embodiment includes a magnetic coupling drive mechanism 1, an outer wall compaction mechanism 2, an inner wall compaction mechanism 3, an electromagnetic reversing mechanism 4, and an inner wall compaction pressure adjustment mechanism 5.

[0022] See also Figure 3A full sectional view of the magnetically driven heat exchanger tube inner and outer surface co-compacting device shown, and Figure 4 The diagram shows the magnetic coupling drive device and its permanent magnet pole arrangement. The magnetic coupling drive mechanism 1 includes an outer rotor and an inner rotor arranged coaxially. The outer rotor includes an annular outer back iron 1-1 and outer permanent magnets 1-2 uniformly arranged along the inner circumference of the outer back iron 1-1. The inner rotor includes an annular inner back iron 1-3 and inner permanent magnets 1-4 uniformly arranged along the outer circumference of the inner back iron 1-3. When the outer rotor rotates in a circular motion, the inner permanent magnets 1-4 and the outer permanent magnets 1-2 achieve non-contact torque transmission through magnetic field coupling. The gap between the outer rotor and the inner rotor allows the heat exchange tube 7 to pass through.

[0023] The outer wall rolling mechanism 2 is coaxially arranged and fixedly connected to the outer rotor. When the external power device 8 drives the outer wall rolling mechanism 2 or the outer rotor to rotate, the outer wall rolling mechanism 2 and the outer rotor rotate synchronously. The outer wall rolling head 2-1 on the outer wall rolling mechanism 2 rolls and strengthens the outer wall of the heat exchange tube. At the same time, the inner rotor of the magnetic coupling drive mechanism 1 can rotate synchronously under the drive of the magnetic field coupling.

[0024] For example, in this embodiment, the outer wall compaction mechanism 2 can be designed to include an integrated outer compaction mounting plate 2-4, a pulley 2-5, and a bearing mounting part 2-6. The outer wall compaction mechanism 2 is mounted on a bearing seat via the bearing mounting part 2-6, and the bearing seat provides support for the outer wall compaction mechanism, enabling it to rotate smoothly. The outer wall compaction mechanism 2 is connected to an external power device 8 via the pulley 2-5. The external power device 8 drives the outer compaction mounting plate 2-4 to rotate via the pulley, causing the outer wall compaction head 2-1 to compact and strengthen the outer wall of the heat exchange tube 7. At the same time, the outer wall compaction mechanism 2 is fixedly connected to the outer rotor of the magnetic coupling drive mechanism 1 via a pin 2-7, so that the outer wall compaction mechanism 2 can synchronously drive the outer rotor to rotate, and thus the inner rotor of the magnetic coupling drive mechanism 1 can also rotate synchronously under the drive of the magnetic field coupling.

[0025] like Figure 5The diagram shows a partial cross-sectional view of the electromagnetic commutation mechanism 4. The electromagnetic commutation mechanism 4 includes a sleeve 4-1, an excitation coil 4-2, a stationary iron core 4-3, a return spring 4-4, a moving iron core 4-5, a commutation spline 4-6, a housing 4-7, and an end cover 4-8. The housing 4-7 and the end cover 4-8 are designed to form a cavity, within which the excitation coil 4-2 is placed. The excitation coil 4-2, stationary iron core 4-3, return spring 4-4, moving iron core 4-5, and reversing spline 4-6 are all disposed inside the sleeve 4-1. The moving iron core 4-5 and the reversing spline 4-6 are fixedly connected to form a reversing actuation assembly. The reversing spline 4-6 is located at the end of the moving iron core 4-5 and can move synchronously with the moving iron core 4-5 along the axial direction of the sleeve 4-1. The return spring 4-4 ​​is disposed between the moving iron core 4-5 and the stationary iron core 4-3 and is used to provide axial return force to the moving iron core 4-5. The stationary iron core 4-3 is fixedly installed inside the sleeve 4-1, and the sleeve 4-1 is fixedly connected to the inner wall rolling mechanism 3.

[0026] like Figure 6 The diagram shows a partial cross-sectional view of the inner wall rolling pressure adjustment mechanism and the state detection and control mechanism. The inner wall rolling pressure adjustment mechanism 5 includes an adjusting screw shaft 5-1, a threaded adjusting section 5-2 mounted on the adjusting screw shaft 5-1, a tapered adjusting slider 5-3, a radial adjusting block 5-4, and an inner wall disc spring assembly 5-5. The adjusting screw shaft 5-1 can mesh with a reversing spline 4-6 to receive the rotational power transmitted by the magnetic coupling drive mechanism 1. The threaded adjusting section 5-2 is threadedly engaged with the tapered adjusting slider 5-3 to convert the rotational motion of the adjusting screw shaft 5-1 into the axial movement of the tapered adjusting slider 5-3.

[0027] refer to Figure 5 and Figure 6 When the excitation coil 4-2 is de-energized, the moving iron core 4-5 maintains its initial position under the action of the return spring 4-4, and the reversing spline 4-6 engages with the sleeve 4-1 to form a torque transmission connection. When the inner rotor of the magnetic coupling drive mechanism 1 rotates, it drives the sleeve 4-1 to rotate synchronously through the reversing spline 4-6. Since the sleeve 4-1 is fixedly connected to the inner wall rolling mechanism 3, it drives the inner wall rolling mechanism 3 to rotate synchronously, thereby achieving coordinated rolling and strengthening of the inner and outer surfaces of the heat exchange tube 7.

[0028] When the excitation coil 4-2 is energized, it generates electromagnetic attraction, driving the moving iron core 4-5 to move axially and overcome the spring force of the return spring 4-4. This causes the reversing spline 4-6 to disengage from the sleeve 4-1 and engage with the adjusting screw shaft 5-1 to form a torque transmission connection. At this time, the inner rotor of the magnetic coupling drive mechanism 1 drives the adjusting screw shaft 5-1 to rotate through the reversing spline 4-6. The threaded adjusting section 5-2 on the adjusting screw shaft 5-1 engages with the tapered adjusting slider 5-3, causing the tapered adjusting section 5-2 to rotate. The section slider 5-3 moves axially; a wedge-shaped fit is formed between the conical adjusting slider 5-3 and the radial adjusting block 5-4. The axial movement of the conical adjusting slider 5-3 is converted into the radial movement of the radial adjusting block 5-4 through the wedge fit, thereby changing the pre-compression of the inner wall disc spring assembly 5-5; the inner wall disc spring assembly 5-5 is connected to the inner wall rolling head 3-1. By adjusting the pre-compression of the inner wall disc spring assembly 5-5, the rolling pressure of the inner wall rolling head 3-1 on the inner wall of the heat exchange tube is adjusted. The reset spring 4-4 ​​is set between the moving iron core 4-5 and the stationary iron core 4-3. The stationary iron core 4-3 can provide axial reset force to the moving iron core 4-5 to enhance the magnetic attraction force generated by the excitation coil 4-2 and improve the reliability of the axial movement of the moving iron core 4-5, thereby facilitating the separation of the reversing spline 4-6 and the sleeve 4-1.

[0029] For example, in this embodiment, when the excitation coil 4-2 is energized, assuming the inner rotor is rotating in the forward direction, the moving iron core 4-5 moves axially and overcomes the elastic force of the return spring 4-4, causing the reversing spline 4-6 to disengage from the sleeve 4-1. The reversing spline 4-6 then forms a torque transmission connection with the adjusting screw shaft 5-1, driving the adjusting screw shaft 5-1 to rotate. At this time, since the reversing spline 4-6 is disengaged from the sleeve 4-1, the torque of the inner rotor of the magnetic coupling drive mechanism 1 is no longer transmitted to the sleeve 4-1, thus no longer driving the inner wall rolling mechanism 3 to rotate, and the rolling and strengthening of the inner wall of the heat exchange tube 7 by the inner wall rolling mechanism 3 is temporarily stopped. Since the reversing spline 4-6 is connected to the adjusting screw shaft 5-1, the torque of the inner rotor of the magnetic coupling drive mechanism 1 is transmitted to the adjusting screw shaft 5-1, driving the threaded adjusting section 5-2 to rotate synchronously, thereby driving the tapered adjusting slider 5-3, which is threadedly engaged with the threaded adjusting section 5-2, to move axially. See also Figure 3 In this embodiment, it is assumed that after the inner rotor rotates in the forward direction, driving the adjusting screw shaft 5-1 to rotate, the conical adjusting slider 5-3 moves linearly to the right. Through the wedge-shaped fit between the conical adjusting slider 5-3 and the radial adjusting block 5-4, the compression of the inner wall disc spring assembly 5-5 by the radial adjusting block 5-4 gradually decreases, thereby reducing the rolling pressure of the inner wall rolling head 3-1 on the inner wall of the heat exchange tube 7, and realizing the online reduction and adjustment of the inner wall rolling pressure.

[0030] If it is desired to increase the inner wall rolling pressure, the rotation direction of the external power device 8 can be changed so that the inner rotor is in a reverse rotation state. At this time, the reversing spline 4-6 and the adjusting screw shaft 5-1 are connected to form a torque transmission connection, driving the adjusting screw shaft 5-1 and its threaded adjusting section 5-2 to rotate. At this time, the conical adjusting slider 5-3 will move axially in the opposite direction. Through the wedge-shaped fit between the conical adjusting slider 5-3 and the radial adjusting block 5-4, the compression of the inner wall disc spring assembly 5-5 by the radial adjusting block 5-4 gradually increases, thereby increasing the rolling pressure of the inner wall rolling head 3-1 on the inner wall of the heat exchange tube, thus realizing the online increase and adjustment of the inner wall rolling pressure.

[0031] Based on the description of this embodiment, it can be understood that the torque transmission path of the inner rotor can be roughly divided into the following two cases: When the excitation coil 4-2 is de-energized, the moving iron core 4-5 maintains its initial position under the action of the return spring 4-4, so that the reversing spline 4-6 forms a torque transmission connection with the inner wall rolling mechanism. When the inner rotor of the magnetic coupling drive mechanism 1 rotates, it drives the inner wall rolling mechanism to rotate through the reversing spline 4-6, so that the inner wall rolling mechanism rolls and strengthens the inner wall of the heat exchange tube. The output torque is transmitted to the inner wall rolling mechanism through the inner rotor, the reversing spline 4-6, and the sleeve 4-1 of the electromagnetic reversing mechanism 4 to drive the inner wall rolling mechanism to perform rolling and strengthening operations.

[0032] When the excitation coil 4-2 is energized, it generates electromagnetic attraction, driving the moving iron core 4-5 to move axially and overcome the elastic force of the return spring 4-4. This causes the reversing spline 4-6 to disengage from the sleeve 4-1 and engage with the adjusting screw shaft 5-1 of the inner wall rolling pressure adjustment mechanism 5, thus forming a new torque transmission path. This transmits the torque output by the inner rotor of the magnetic coupling drive mechanism 1 to the inner wall rolling pressure adjustment mechanism 5, thereby realizing the conversion of the inner wall rolling mechanism from the rolling operation state to the rolling pressure adjustment state.

[0033] After the rolling pressure is adjusted, the excitation coil 4-2 is de-energized, and the moving iron core 4-5 is reset under the action of the reset spring 4-4, so that the reversing spline 4-6 and the sleeve 4-1 are re-engaged, and the torque transmission path from the inner rotor to the inner wall rolling mechanism is re-established. When the inner rotor of the magnetic coupling drive mechanism 1 rotates, it can continue to drive the inner wall rolling mechanism to rotate and continue the rolling and strengthening operation.

[0034] Based on this embodiment, the external power device can be adjusted to first drive the outer rotor of the magnetic coupling drive mechanism 1 to rotate. Then, since the outer rolling mounting plate 2-4 is fixedly connected to the outer rotor of the magnetic coupling drive mechanism 1, it synchronously drives the outer rolling mounting plate 2-4 to rotate, thereby achieving coordinated rolling strengthening of the inner and outer surfaces of the heat exchange tube. Specifically, the outer rotor is driven by the external power device 8 to rotate in a circular motion. At this time, the outer rotor drives the outer wall rolling mechanism 2 to rotate in a circular motion, thereby achieving the outer wall rolling head to roll the outer wall of the heat exchange tube. Meanwhile, the inner permanent magnet 1-4 and the outer permanent magnet 1-2 achieve non-contact torque transmission through magnetic field coupling, thereby driving the inner rotor to rotate synchronously, thereby achieving coordinated rolling strengthening of the inner and outer surfaces of the heat exchange tube.

[0035] Example 2 Compared to Example 1, the wedge-shaped fit between the tapered adjusting slider 5-3 and the radial adjusting block 5-4 can also be changed, as shown in the reference. Figure 3 The tapered adjusting slider 5-3 is changed from a "trapezoidal shape with a shorter left side and a longer right side" to a "trapezoidal shape with a longer left side and a shorter right side." This reverses the wedge-shaped fit between the tapered adjusting slider and the radial adjusting block in this embodiment, making it the opposite of the wedge-shaped fit in Embodiment 1. Specifically, in this embodiment, assuming the inner rotor rotates forward, causing the adjusting screw shaft 5-1 to rotate, the tapered adjusting slider 5-3 still moves linearly to the right. However, due to the change in the wedge-shaped fit between the tapered adjusting slider and the radial adjusting block, the compression of the radial adjusting block 5-4 on the inner wall disc spring assembly 5-5 gradually increases. This increases the rolling pressure exerted by the inner wall rolling head 3-1 on the inner wall of the heat exchange tube, thus achieving online adjustment of the inner wall rolling pressure.

[0036] Therefore, assuming that the conical adjusting slider 5-3 always moves linearly to the right, changing the wedge-shaped fit between the conical adjusting slider 5-3 and the radial adjusting block 5-4 can alter the compression of the inner wall disc spring assembly 5-5 by the radial adjusting block 5-4. Those skilled in the art can adjust the wedge-shaped fit between the conical adjusting slider 5-3 and the radial adjusting block 5-4 according to the desired compression. Furthermore, the compression can also be changed... Figure 3 The trapezoidal slope of the conical adjusting slider 5-3 enables the control of the movement distance of the radial adjusting block 5-4 per unit movement distance of the conical adjusting slider 5-3, thereby enabling the control of the compression amount of the inner wall disc spring assembly 5-5 per unit movement distance of the conical adjusting slider 5-3, so as to further achieve precise control of the inner wall rolling pressure by the conical adjusting slider 5-3.

[0037] Thus, by controlling the energization and de-energization of the excitation coil 4-2, the inner wall compaction mechanism can achieve online adjustment of the inner wall compaction pressure without disengaging the heat exchange tube. In particular, when the inner wall compaction mechanism jams, after energizing the excitation coil 4-2, the compaction pressure of the inner wall compaction head 3-1 in the inner wall compaction mechanism 3 can be adjusted to overcome the jamming, and the inner wall compaction mechanism can achieve online adjustment of the compaction pressure without disengaging the heat exchange tube.

[0038] Example 3 Based on Example 1 or 2, such as Figure 4 As shown, in the magnetic coupling drive mechanism 1, the inner permanent magnet 1-4 and the outer permanent magnet 1-2, located on the same axial cross section, constitute a set of magnetic coupling units. The magnetic coupling drive mechanism 1 includes multiple sets of magnetic coupling units, which are arranged sequentially along the axial direction of the heat exchange tube. Adjacent magnetic coupling units adopt an alternating magnetic pole arrangement. This achieves non-contact torque transmission while simultaneously providing axial magnetic compensation, counteracting the axial frictional resistance experienced by the inner wall rolling mechanism during heat exchange tube transport, reducing the tendency of the inner wall rolling mechanism to move axially, and improving the operational stability and rolling position maintenance accuracy of the inner wall rolling mechanism. Preferably, the magnetic coupling drive mechanism 1 includes four sets of magnetic coupling units.

[0039] Figure 9 This is a magnetic flux density distribution diagram of a magnetically coupled drive device using four sets of magnetic coupling units. Figure 10 This is a comparison chart showing the torque provided by the magnetic coupling drive device when using different sets of magnetic coupling units. Figure 11 This is a comparison diagram showing the axial force provided by the magnetic coupling drive device when using different sets of magnetic coupling units. Figure 9-11 The results show that, compared with single or double sets of magnetic coupling units, the use of four sets of magnetic coupling units arranged axially according to the present invention can improve the torque transmission capability of the magnetic coupling drive device. At the same time, the superposition of axial magnetic forces generated by multiple sets of magnetic coupling units can improve the axial stability of the inner wall rolling mechanism during operation.

[0040] Example 4 In this embodiment, as Figure 3 As shown, the outer wall rolling mechanism 2 may further include an outer wall disc spring assembly 2-2 and a pre-tightening adjusting screw 2-3. The outer rolling mounting plate 2-4 is provided with multiple sets of mounting holes evenly distributed along the circumference. Each mounting hole is equipped with an outer wall rolling unit consisting of an outer wall rolling head 2-1, an outer wall disc spring assembly 2-2, and a pre-tightening adjusting screw 2-3. The pre-tightening adjusting screw 2-3 is used to adjust the pre-compression of the outer wall disc spring assembly 2-2 to change the rolling pressure of the outer wall rolling head 2-1 acting on the outer wall of the heat exchange tube.

[0041] In other embodiments, such as Figure 6 As shown, the magnetically driven heat exchanger tube inner and outer surface co-compacting device may further include a state detection and control mechanism 6. This mechanism includes a control module 6-1, an outer wall load sensor 6-2, an inner wall load sensor 6-3, and a centrifugal inertial switch 6-4. The outer wall load sensor 6-2 is used to detect the rolling pressure of the corresponding outer wall compaction head 2-1 in real time. The inner wall load sensor 6-3 is used to detect the rolling pressure of the corresponding inner wall compaction head 3-1 in real time. The centrifugal inertial switch 6-4 is used to detect the rotational working state of the inner wall compaction mechanism. The control module 6-1 is electrically connected to the outer wall load sensor 6-2, the inner wall load sensor 6-3, the centrifugal inertial switch 6-4, and the electromagnetic reversing mechanism 4. It provides power to each detection and execution unit, collects, processes, and judges the detection signals, and identifies and controls the operating state of the inner wall compaction mechanism.

[0042] The centrifugal inertial switch 6-4 includes a housing, a fixed electrode, a movable electrode, and an inertial return spring. The movable electrode is located inside the housing and connected to the inertial return spring. When the inner wall compaction mechanism 3 rotates normally, the movable electrode overcomes the elastic force of the inertial return spring under the action of centrifugal force and contacts the fixed electrode, causing the centrifugal inertial switch 6-4 to close. When the inner wall compaction mechanism 3 jams, stops, or its speed is lower than a set threshold, the movable electrode returns to its initial position under the action of the inertial return spring, separates from the fixed electrode, and causes the centrifugal inertial switch 6-4 to open, thereby realizing real-time detection of the working status of the inner wall compaction mechanism 3.

[0043] Example 5 Based on the above embodiments, the control method for the magnetically driven heat exchanger tube inner and outer surface co-compacting device includes the following steps: S1. Arrange the compaction strengthening device on the heat exchange tube production line, and transport the heat exchange tubes to the compaction station along the production line; set the initial compaction pressure of the outer wall compaction mechanism and the inner wall compaction mechanism respectively. S2. The outer wall rolling mechanism and the outer rotor are driven to rotate by the motor. The outer rotor drives the inner rotor to rotate through the magnetic field coupling effect, so that the inner wall rolling mechanism and the outer wall rolling mechanism rotate synchronously, and the inner and outer surfaces of the heat exchange tube are synergistically rolled and strengthened. S3. Real-time acquisition of rolling pressure signals output by the outer wall load sensor and the inner wall load sensor, as well as the working status signal output by the centrifugal inertial switch, to identify and judge the operating status of the entire rolling device; S4. When the inner wall rolling pressure of the inner wall rolling mechanism is detected to be within the set range and the inner wall rolling mechanism is in normal operating condition, the inner wall rolling mechanism is kept in the rolling working state to continuously carry out the coordinated rolling strengthening of the inner and outer surfaces of the heat exchange tube. S5. When the inner wall rolling pressure of the inner wall rolling mechanism is detected to exceed the set range, or when the inner wall rolling mechanism is stuck or stops, the electromagnetic reversing mechanism is energized to connect the reversing spline to the adjusting screw shaft, and the torque output by the magnetic coupling drive mechanism drives the rolling pressure adjustment mechanism to adjust the inner wall rolling pressure online. S6. After the inner wall rolling pressure is adjusted, the electromagnetic reversing mechanism is de-energized and reset, so that the reversing spline assembly resumes engagement with the sleeve, allowing the inner rotor to re-establish torque transmission connection with the inner wall rolling mechanism, restoring the rolling working state of the inner wall rolling mechanism, and continuing the coordinated rolling strengthening of the inner and outer surfaces of the heat exchange tube. S7. Repeat steps S3 to S6 until the online collaborative compaction and strengthening operation of the entire length of the heat exchange tube is completed.

[0044] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A magnetically driven device for coordinating the inner and outer surfaces of a heat exchanger tube, characterized in that, It includes a magnetic coupling drive mechanism (1), an outer wall compaction mechanism (2), an inner wall compaction mechanism (3), an electromagnetic reversing mechanism (4), and an inner wall compaction pressure adjustment mechanism (5). The magnetic coupling drive mechanism (1) includes an outer rotor and an inner rotor arranged coaxially. The outer rotor includes an annular outer back iron (1-1) and an outer permanent magnet (1-2) uniformly arranged along the inner circumference of the outer back iron (1-1). The inner rotor includes an annular inner back iron (1-3) and an inner permanent magnet (1-4) uniformly arranged along the outer circumference of the inner back iron (1-3). When the outer rotor rotates in a circular motion, the inner permanent magnet (1-4) and the outer permanent magnet (1-2) achieve non-contact torque transmission through magnetic field coupling. The gap between the outer rotor and the inner rotor allows the heat exchange tube (7) to pass through. The outer wall rolling mechanism (2) is coaxially arranged and fixedly connected with the outer rotor. When the external power device (8) drives the outer wall rolling mechanism (2) or the outer rotor to rotate, the outer wall rolling mechanism (2) and the outer rotor rotate synchronously. The outer wall rolling head (2-1) on the outer wall rolling mechanism (2) rolls and strengthens the outer wall of the heat exchange tube. At the same time, the inner rotor of the magnetic coupling drive mechanism (1) can rotate synchronously under the drive of the magnetic field coupling. The inner wall rolling mechanism (3) is driven by the inner rotor of the magnetic coupling drive mechanism (1) to rotate. The inner wall rolling head (3-1) on the inner wall rolling mechanism (3) is installed on the inner rolling mounting plate (3-2) and rolls and strengthens the inner wall of the heat exchange tube. The electromagnetic commutation mechanism (4) includes a sleeve (4-1), an excitation coil (4-2), a stationary iron core (4-3), a return spring (4-4), a moving iron core (4-5), and a commutation spline (4-6). The excitation coil (4-2), stationary iron core (4-3), return spring (4-4), moving iron core (4-5), and commutation spline (4-6) are all housed inside the sleeve (4-1). The moving iron core (4-5) and the commutation spline (4-6) are fixedly connected. The reversing actuator is formed, wherein the reversing spline (4-6) is located at the end of the moving iron core (4-5) and can move synchronously with the moving iron core (4-5) along the axial direction of the sleeve (4-1); the return spring (4-4) is disposed between the moving iron core (4-5) and the stationary iron core (4-3) and is used to provide axial return force to the moving iron core (4-5); the stationary iron core (4-3) is fixedly installed inside the sleeve (4-1), and the sleeve (4-1) is fixedly connected to the inner wall rolling mechanism (3); The inner wall rolling pressure adjustment mechanism (5) includes an adjusting screw shaft (5-1), a threaded adjusting section (5-2) disposed on the adjusting screw shaft (5-1), a conical adjusting slider (5-3), a radial adjusting block (5-4), and an inner wall disc spring assembly (5-5); the adjusting screw shaft (5-1) can mesh with a reversing spline (4-6) to receive the rotational power transmitted by the magnetic coupling drive mechanism (1); the threaded adjusting section (5-2) is threadedly engaged with the conical adjusting slider (5-3) to convert the rotational motion of the adjusting screw shaft (5-1) into the axial movement of the conical adjusting slider (5-3); When the excitation coil (4-2) is de-energized, the moving iron core (4-5) maintains its initial position under the action of the reset spring (4-4), and the reversing spline (4-6) meshes with the sleeve (4-1) to form a torque transmission connection; when the inner rotor of the magnetic coupling drive mechanism (1) rotates, it drives the sleeve (4-1) to rotate synchronously through the reversing spline (4-6). Since the sleeve (4-1) is fixedly connected to the inner wall rolling mechanism (3), it drives the inner wall rolling mechanism (3) to rotate synchronously, thereby realizing the synergistic rolling strengthening of the inner and outer surfaces of the heat exchange tube; When the excitation coil (4-2) is energized, it generates electromagnetic attraction, driving the moving iron core (4-5) to move axially and overcome the spring force of the return spring (4-4), causing the reversing spline (4-6) to disengage from the sleeve (4-1) and engage with the adjusting screw shaft (5-1) to form a torque transmission connection. At this time, the inner rotor of the magnetic coupling drive mechanism (1) drives the adjusting screw shaft (5-1) to rotate through the reversing spline (4-6). The threaded adjustment section (5-2) on the adjusting screw shaft (5-1) engages with the tapered adjusting slider (5-3) to make the torque transmission connection between the screw shaft and the sleeve (4-5). The conical adjusting slider (5-3) moves axially; a wedge-shaped fit is formed between the conical adjusting slider (5-3) and the radial adjusting block (5-4). The axial movement of the conical adjusting slider (5-3) is converted into the radial movement of the radial adjusting block (5-4) through the wedge fit, thereby changing the pre-compression of the inner wall disc spring assembly (5-5); the inner wall disc spring assembly (5-5) is connected to the inner wall rolling head (3-1). By adjusting the pre-compression of the inner wall disc spring assembly (5-5), the rolling pressure of the inner wall rolling head (3-1) on the inner wall of the heat exchange tube is adjusted.

2. The magnetically driven heat exchanger tube inner and outer surface co-compacting device as described in claim 1, characterized in that, In the magnetic coupling drive mechanism (1), the outer permanent magnet (1-2) and the inner permanent magnet (1-4) located in the same axial section constitute a set of magnetic coupling units. The magnetic coupling drive mechanism (1) includes multiple sets of magnetic coupling units. The magnetic coupling units are arranged sequentially along the axial direction. Adjacent magnetic coupling units adopt an alternating magnetic pole arrangement. There is no rotation angle deviation between the symmetrical center lines of each set of magnetic coupling units.

3. The magnetically driven heat exchanger tube inner and outer surface co-compacting device as described in claim 2, characterized in that, The magnetic coupling drive mechanism (1) includes 4 sets of magnetic coupling units.

4. A magnetically driven heat exchange tube inner and outer surface co-compacting device as described in any one of claims 1-3, wherein the outer wall compaction mechanism (2) may further include an outer wall disc spring assembly (2-2) and a pre-tightening adjusting screw (2-3), wherein the outer wall compaction mounting plate (2-4) on the outer wall compaction mechanism (2) is provided with multiple sets of mounting holes evenly distributed along the circumferential direction, and each mounting hole is respectively installed with an outer wall compaction unit consisting of an outer wall compaction head (2-1), an outer wall disc spring assembly (2-2) and a pre-tightening adjusting screw (2-3); the pre-tightening adjusting screw (2-3) is used to adjust the pre-compression amount of the outer wall disc spring assembly (2-2) to change the compaction force of the outer wall compaction head (2-1) acting on the outer wall of the heat exchange tube.

5. A magnetically driven heat exchanger tube inner and outer surface co-compacting device as described in any one of claims 1-3, characterized in that, The magnetically driven heat exchange tube inner and outer surface co-compacting device may also include a state detection and control mechanism (6). The state detection and control mechanism includes a control module (6-1), an outer wall load sensor (6-2), an inner wall load sensor (6-3), and a centrifugal inertial switch (6-4). The outer wall load sensor (6-2) is used to detect the rolling pressure of the corresponding outer wall rolling head (2-1) in real time. The inner wall load sensor (6-3) is used to detect the rolling pressure of the corresponding inner wall rolling head (3-1) in real time. The centrifugal inertial switch (6-4) is used to detect the rotational working state of the inner wall rolling mechanism. The control module (6-1) is electrically connected to the outer wall load sensor (6-2), the inner wall load sensor (6-3), the centrifugal inertial switch (6-4), and the electromagnetic reversing mechanism (4). It is used to provide working power to each detection and execution unit, and to collect, process, and judge the detection signals, and to identify and control the operating state of the inner wall rolling mechanism.

6. The control method for a magnetically driven heat exchange tube inner and outer surface co-compacting device as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Arrange the compaction strengthening device on the heat exchange tube production line, and transport the heat exchange tubes to the compaction station along the production line; set the initial compaction pressure of the outer wall compaction mechanism and the inner wall compaction mechanism respectively. S2. The outer wall rolling mechanism and the outer rotor are driven to rotate by an external power device. The outer rotor drives the inner rotor to rotate through magnetic field coupling, so that the inner wall rolling mechanism and the outer wall rolling mechanism rotate synchronously, and the inner and outer surfaces of the heat exchange tube are synergistically rolled and strengthened. S3. Real-time identification and judgment of the operating status of the entire compaction device; S4. When the inner wall rolling pressure of the inner wall rolling mechanism is detected to be within the set range and the inner wall rolling mechanism is in normal operating condition, the inner wall rolling mechanism is kept in the rolling working state to continuously carry out the coordinated rolling strengthening of the inner and outer surfaces of the heat exchange tube. S5. When the inner wall rolling pressure of the inner wall rolling mechanism is detected to exceed the set range, or when the inner wall rolling mechanism is stuck or stops, the electromagnetic reversing mechanism is energized to connect the reversing spline to the adjusting screw shaft, and the torque output by the magnetic coupling drive mechanism drives the inner wall rolling pressure adjustment mechanism to adjust the inner wall rolling pressure online. S6. After the inner wall rolling pressure is adjusted, the electromagnetic reversing mechanism is de-energized and reset, so that the reversing spline resumes engagement with the sleeve, allowing the inner rotor to re-establish torque transmission connection with the inner wall rolling mechanism, restoring the rolling working state of the inner wall rolling mechanism, and continuing the coordinated rolling strengthening of the inner and outer surfaces of the heat exchange tube. S7. Repeat steps S3 to S6 until the online collaborative compaction and strengthening operation of the entire length of the heat exchange tube is completed.

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