Tube bundle push-pull device and push-pull method

Abstract

The application relates to a tube bundle pushing and pulling device and a pushing and pulling method, which comprises a support, a moving support arranged on the support, a driving wheel set rotatably arranged on the moving support, driving chains arranged around the driving wheel set, and a biasing mechanism. A heat exchanger is arranged in the support, and the moving support is arranged on both sides of the heat exchanger. The biasing mechanism is connected with the heat exchanger, and the biasing mechanism drives the heat exchanger to move in the moving support and bias. One end of the driving chains on both sides is engaged with each other, and then the driving chains push the tube bundle from the tube bundle moving direction. The other end of the driving chains on both sides pulls the tube bundle from the tube bundle moving direction. The application solves the problem that the structural strength of a special structure tube bundle is weakened in the prior art, and if the hydraulic push rod is still used to push or pull out linearly, the tube bundle will be twisted and deformed and even cracks will appear.

Description

Technical Field

[0001] This invention relates to the field of push-pull devices, and more particularly to a tube bundle push-pull device and push-pull method. Background Technology

[0002] During the production process, the manufactured tube bundles need to be installed into the heat exchanger. After prolonged use, the tube bundles need to be removed from the heat exchanger for cleaning and repair. In these scenarios, specialized equipment is used, which utilizes the extension and retraction of hydraulic push rods to move the tube bundles, thereby removing or installing them into the heat exchanger.

[0003] During the push-pull process, the tube bundle and the heat exchanger will generate significant friction. The tube bundle of a traditional straight tube heat exchanger has straight and densely arranged tubes, which gives the tube bundle a certain structural strength. During the push-pull process, the tube bundle will not be significantly deformed, and the impact is minimal.

[0004] If the tube bundle uses a spiral pipe, a spiral tube sheet, a small number of pipes, a thin pipe wall, or a long pipe length, the structural strength of the tube bundle will be weakened. If it is still pushed or pulled out in a straight line by a hydraulic push rod, it will cause the tube bundle to twist and deform or even crack.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a tube bundle push-pull device and push-pull method to solve the problem that the structural strength of special structure tube bundles is weakened in the prior art, and if hydraulic push rods are still used to push or pull them out in a straight line, it will cause the tube bundle to twist, deform or even crack.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] A tube bundle push-pull device and push-pull method;

[0009] Includes: a support frame; a movable frame, movably mounted on the support frame; a drive wheel assembly, rotatably mounted on the movable frame; a drive chain, wound around the drive wheel assembly; and a eccentric mechanism for driving the heat exchanger to eccentricate.

[0010] The heat exchanger is placed inside the support, and the moving frame is located on both sides of the heat exchanger; the eccentric mechanism is connected to the heat exchanger, and the eccentric mechanism moves along the moving frame to drive the heat exchanger to eccentricate; after one end of the drive chain on both sides meshes with each other, it pushes the tube bundle from the tube bundle removal direction; the other end of the drive chain on both sides pulls the tube bundle from the tube bundle removal direction.

[0011] A further technical solution is that the support includes a frame, a support block that abuts the heat exchanger, and a pressing device that presses the heat exchanger; wherein, a notch is formed on the frame; the support block and the pressing device are arranged opposite to each other at both ends in the notch, such that when the heat exchanger is placed in the notch, both ends of the heat exchanger are placed between the pressing ends of the support block and the pressing device.

[0012] A further technical solution is that a roller is rotatably mounted on the transfer frame; a first gear is coaxially mounted on the roller; a first rack is mounted on the frame along the tube bundle moving direction; the first gear meshes with the first rack; a moving space is formed on the frame along the tube bundle moving direction, and the roller rolls along the moving space.

[0013] A further technical solution is that the drive wheel assembly includes: a power wheel rotatably disposed on the frame near both ends of the heat exchanger, a direction wheel rotatably disposed on the frame near both ends of the tube bundle, and a tension wheel rotatably disposed on the frame near the power wheel; wherein, a first power device is disposed on the moving frame, and the first power device drives each of the power wheels to rotate.

[0014] A further technical solution is that rotating components are provided at both ends of the drive chain; the rotating components include: a fixed component connected to the drive chain, a rotating block rotatably disposed on the fixed component, and a first expansion component movably disposed on the rotating block; wherein, the rotating block abuts against the end face of the tube bundle, and the first expansion component is inserted into the tube bundle and expands to contact the inside of the tube bundle.

[0015] A further technical solution is that the deflection mechanism includes a bent piece disposed on the frame around the heat exchanger, a movable actuating block disposed on the bent piece, an actuating rod connected to the actuating block, and a second expansion member disposed on the actuating rod; wherein the actuating rod is close to the end face of the heat exchanger, and the second expansion member is inserted into the end face of the heat exchanger.

[0016] A further technical solution includes a lifting mechanism; the lifting mechanism includes a lifting block, a first lifting plate for placing the heat exchanger, and a second lifting plate for restricting the position of the heat exchanger; the first lifting plate is movably mounted on the lifting block, and the second lifting plate is located on both sides of the first lifting plate.

[0017] A tube bundle push-pull method includes the following steps:

[0018] Calculation steps: Based on the heat exchanger data and tube bundle data, determine the heat exchanger lifting height data, tube bundle removal distance data, and tube bundle push-pull force value data;

[0019] Preparation steps: Hoist the heat exchanger into the frame; according to the lifting height data of the heat exchanger, the first lifting plate moves along the lifting block to raise the heat exchanger to a certain height; the clamping ends of the frame block and the clamping device hold the two ends of the heat exchanger; the moving frame moves along the frame to approach the heat exchanger, the rotating part abuts against the tube bundle and inserts into the tube bundle, and the second expansion part is inserted into the heat exchanger.

[0020] Push-pull steps: Based on the tube bundle displacement distance data and tube bundle push-pull force data, the first power unit outputs the set power, and one end of the drive chain meshes with each other to push the tube bundle, while the other end of the drive chain pulls the tube bundle; when the upper limit data of the tube bundle bearing force value is close to the tube bundle push-pull force value data, the actuating block moves along the bend to drive the heat exchanger to deflect at a certain angle.

[0021] Compared with the prior art, the beneficial technical effects of the present invention are as follows: (1) During the movement of the tube bundle, if the friction between the tube bundle and the heat exchanger is large, the push-pull process will cause friction and deformation of the tube bundle; the eccentric mechanism is connected to the heat exchanger and is located in the direction of tube bundle movement; during the tube bundle movement, the eccentric mechanism moves along the support and drives the heat exchanger to eccentricate, which reduces the resistance between the heat exchanger and the tube bundle and facilitates the tube bundle to move out of the heat exchanger in a straight line; the drive chain simultaneously forms a push and pull force on the tube bundle, so that the force on a single position of the tube bundle is small, and avoids deformation during the tube bundle movement; at the same time, the tube bundle adopts the method of rotating the heat exchanger to reduce the friction between the tube bundle and the heat exchanger and avoid friction and deformation of the tube bundle.

[0022] (2) The drive chains have strong rigidity after being meshed at one end, which can push the tube bundle; the other end of the drive chains enters and exits from two positions on the end face of the tube bundle and pulls it. By adjusting the pulling force of the two drive chains, the pulling force of the other end of the two drive chains is different, thereby adjusting the pulling posture of the tube bundle and avoiding tilting during the movement of the tube bundle, which would increase the friction between the tube bundle and the heat exchanger; the power output of the first power device driving the power wheel is independent of each other. By pushing and pulling the tube bundle separately, the output power at each position is reduced, so that the first power device can also complete the power output as a motor, avoiding the use of a hydraulic system to generate thrust, and realizing the electrification control of the tube bundle push-pull device.

[0023] (3) The eccentric mechanism is located at both ends of the heat exchanger and drives the heat exchanger to eccentricate from the left and right directions to ensure that the heat exchanger is subjected to uniform force and the tube bundle will not deform during the eccentrication process. In order to avoid interference between the eccentric mechanism and the heat exchanger during the placement of the heat exchanger, the actuating rod is designed to be detachable. After the actuating rod is inserted into the actuating block, a pin is inserted into the actuating block and the pin passes through the actuating rod. When the actuating rod needs to be removed, the pin can be pulled out.

[0024] (4) In order to complete the movement of the tube bundle, the bent part needs to be parallel to the heat exchanger to complete the deflection. The heat exchanger is moved up and down by the lifting mechanism to keep the heat exchanger and the moving frame on the same central axis. The fifth power device pushes the second lifting plate to rise and fall. The second lifting plate contacts the side of the lower end of the heat exchanger to limit the front and rear position of the heat exchanger and prevent the heat exchanger from detaching from the first lifting plate during the deflection process. Attached Figure Description

[0025] Figure 1 A top view of the tube bundle push-pull device according to the first embodiment of the present invention is shown.

[0026] Figure 2 A top view of the frame structure according to the first embodiment of the present invention is shown.

[0027] Figure 3 A front view structural schematic diagram of the frame according to the first embodiment of the present invention is shown.

[0028] Figure 4 It shows Figure 3 A magnified left-side view of the structure at the position of the first gear.

[0029] Figure 5 A top view of the rotating component according to the first embodiment of the present invention is shown.

[0030] Figure 6 A top view of the biasing mechanism according to the first embodiment of the present invention is shown.

[0031] Figure 7 A schematic diagram of the structure after the drive chain is engaged according to the first embodiment of the present invention is shown.

[0032] In the attached diagram, the following are labeled: 1. Support; 11. Frame; 12. Frame block; 13. Clamping device; 14. Notch; 15. Engaging support; 151. Engaging gear; 2. Shifting frame; 21. Roller; 211. Protrusion; 22. First gear; 221. Second power unit; 23. First rack; 24. Moving space; 241. Moving slot; 25. Mounting port; 26. Chain roller; 3. Drive wheel assembly; 31. Power wheel; 32. Directional wheel; 33. Tensioner wheel; 34. First power unit; 4. Drive chain; 5. Offset mechanism; 5 1. Bending component; 511. Second rack; 512. Guide rail; 52. Actuating block; 521. Second gear; 522. Third power unit; 53. Actuating rod; 54. Second expansion component; 6. Rotating component; 61. Fixing component; 62. Rotating block; 621. First elastic device; 63. First expansion component; 631. Expansion rod; 632. Expansion block; 633. Conical block; 7. Lifting mechanism; 71. Lifting block; 711. Fourth power unit; 712. Fifth power unit; 72. First lifting plate; 73. Second lifting plate. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the device proposed by this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, only for the purpose of conveniently and clearly illustrating the embodiments of this invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0034] Figure 1 A top view of the tube bundle push-pull device according to the first embodiment of the present invention is shown. Figure 2 A top view of the frame structure according to the first embodiment of the present invention is shown. Figure 3 A front view structural schematic diagram of the frame according to the first embodiment of the present invention is shown. Figure 4 It shows Figure 3 A magnified left-side view of the structure at the position of the first gear. (Combined with...) Figures 1-4 As shown, the present invention discloses a tube bundle push-pull device.

[0035] The tube bundle push-pull device includes: a bracket 1 arranged in the left-right direction, a movable frame 2 arranged on the bracket 1, a drive wheel set 3 arranged on the movable frame 2, a drive chain 4 wound around the drive wheel set 3, and a deflection mechanism 5 for driving the heat exchanger to deflect.

[0036] The heat exchanger is positioned within the support 1 in a left-right direction, and the shifting frame 2 is mounted on the support 1 in a left-right direction, located on the front and rear sides of the heat exchanger. The deflection of the heat exchanger is a certain angle of clockwise or counterclockwise deflection around its left-right axis.

[0037] After the moving frame 2 moves closer to the heat exchanger, the left ends of the two drive chains 4 mesh with each other, pushing the tube bundle from the direction of tube bundle removal, and the tube bundle moves out of the heat exchanger from left to right. The right ends of the two drive chains 4 pull the tube bundle from the direction of tube bundle removal, and the tube bundle moves out of the heat exchanger from left to right.

[0038] During the tube bundle movement, if the friction between the tube bundle and the heat exchanger is large, the pushing and pulling process will cause friction and deformation of the tube bundle. The eccentric mechanism 5 is connected to the heat exchanger and is located in the direction of tube bundle movement. During tube bundle movement, the eccentric mechanism 5 moves along the support 1, causing the heat exchanger to eccentricate, reducing the resistance between the heat exchanger and the tube bundle, and facilitating the tube bundle to move out of the heat exchanger in a linear manner.

[0039] By simultaneously applying thrust and tension to the tube bundle via drive chain 4, the stress on a single location within the tube bundle is minimized, preventing deformation during the tube bundle's removal process. Furthermore, the tube bundle utilizes a rotating heat exchanger to reduce friction between the tube bundle and the heat exchanger, thus preventing friction and deformation of the tube bundle.

[0040] The support 1 includes a frame 11, a support block 12 that abuts against the heat exchanger, and a pressing device 13 that presses the heat exchanger together. The frame 11 has notches 14 formed in the left-right direction and distributed in the front-back direction. For example, there are four sets of support blocks 12 and pressing devices 13. The support blocks 12 and pressing devices 13 are arranged opposite each other at both ends within the notches 14.

[0041] When the heat exchanger is placed inside the frame 11, the heat exchanger is placed inside the notch 14, and both ends of the heat exchanger are placed between the frame block 12 and the pressing end of the pressing device 13.

[0042] A first screw is threaded through the frame block 12 and is threaded onto the frame body 11. The frame block 12 is rotatably connected to the first screw. The position of the frame block 12 can be adjusted by rotating the first screw to accommodate heat exchangers of different lengths.

[0043] For example, the clamping device 13 is a hydraulic cylinder. The clamping end of the clamping device 13 is rotatably connected to the drive block. By rotating the drive block and the frame block 12, the frame block 12 and the clamping end of the clamping device 13 can restrict different positions of the heat exchanger to accommodate heat exchangers of different diameters and different heights.

[0044] Because the eccentric mechanism 5 can drive the heat exchanger to eccentricate, the clamping ends of the support block 12 and the clamping device 13 do not clamp the heat exchanger, and there is a gap between the support block 12, the clamping ends of the clamping device 13 and the end of the heat exchanger. When the heat exchanger eccentricates, the tube bundle will move linearly, causing the heat exchanger to shift. The clamping ends of the support block 12 and the clamping device 13 restrict the heat exchanger from making large displacements. If the heat exchanger has a large displacement after multiple eccentricities, the clamping device 13 will push the heat exchanger back to its original position.

[0045] Rollers 21 are rotatably mounted on the transfer frame 2. A moving space 24 is formed on the frame body 11 along the direction of tube bundle movement, and the rollers 21 roll along the moving space 24. The moving space 24 is formed on the frame body 11 in the left and right directions. The rollers 21 contact the upper and lower sides of the moving space 24 respectively, and the rollers 21 are confined within the moving space 24 to prevent the transfer frame 2 from tipping over during the pushing and pulling of the tube bundle.

[0046] A moving groove 241 is formed around the moving space 24, and a protrusion 211 is provided around the roller 21. When the roller 21 is placed in the moving space 24, the protrusion 211 is embedded in the moving groove 241, thereby preventing the roller 21 from leaving the moving space 24 during the rolling process.

[0047] A first gear 22 is coaxially mounted on the roller 21, and a first rack 23 is mounted on the frame 11 along the direction of tube bundle movement. The first gear 22 meshes with the first rack 23.

[0048] The first gear 22 is driven by the second power device 221. For example, the second power device 221 is an electric motor. The second power device 221 drives the first gear 22 to roll and mesh along the first rack 23, causing the roller 21 to roll within the moving space 24, so that the moving frame 2 moves along the frame 11.

[0049] The drive wheel assembly 3 includes: power wheels 31 rotatably mounted on the frame 11 near both ends of the heat exchanger; directional wheels 32 rotatably mounted on the frame 11 near both ends of the tube bundle; and tension wheels 33 rotatably mounted on the frame 11 near the power wheels 31. A first power unit 34 is mounted on the moving frame 2, and the first power unit 34 drives each power wheel 31 to rotate.

[0050] For example, the first power device 34 is an electric motor. One end of the drive chain 4 is sequentially wound around the power wheel 31, tension wheel 33 and directional wheel 32 on the left side, and one end of the drive chains 4 on both sides meshes with each other to drive the tube bundle to move. The other end of the drive chain 4 is sequentially wound around the power wheel 31, tension wheel 33 and directional wheel 32 on the right side, and the other end of the drive chains 4 on both sides pulls the relative position of the tube bundle end faces.

[0051] The drive chain 4 between the drive wheels 31 is in a slack state, so that the forces generated by the drive wheels 31 at both ends of the drive chain 4 cannot affect each other through the drive chain 4. The tension wheel 33 keeps the drive chain 4 in a taut state and wound around the steering wheel 32, ensuring that the force of the drive wheels 31 can act on the tube bundle.

[0052] The frame 11 is equipped with a meshing bracket 15, and a meshing channel is formed within the meshing bracket 15. After one end of the drive chains 4 on both sides enters the meshing channel, they change their direction of movement, mesh with each other, and then move out. The meshing bracket 15 completes the meshing and disengagement of the drive chains 4 on both sides.

[0053] To facilitate the movement of the drive chain 4 into the engagement bracket 15, engagement gears 151 are rotatably arranged on both sides of the engagement bracket 15. The drive chain 4 winds around the engagement gears 151 and enters the engagement bracket 15. To ensure that the drive chain 4 provides a stable thrust to the tube bundle after engagement, a sixth power device 152 is provided on the engagement bracket 15. For example, the sixth power device 152 is an electric motor. The sixth power device 152 drives the engagement gears 151 to rotate, providing power to the drive chain 4, so that the drive chain 4 can stably engage and push the tube bundle to move.

[0054] Figure 7 A schematic diagram of the structure after the drive chain is engaged according to the first embodiment of the present invention is shown. (Combined with...) Figures 1-4 and Figure 7 As shown, for example, drive chain 4 is a rigid chain. The structure of drive chain 4 can also be... Figure 7 Other structures shown in the diagram enable the drive chains 4 to mesh together to form a rigid whole. The meshed drive chains 4 will not loosen or bend, and the meshed drive chains 4 exert a linear force on the tube bundle.

[0055] The drive chains 4 have strong rigidity after being meshed at one end, which can provide thrust to the tube bundle. The other end of the drive chains 4 enters and exits from two positions on the end face of the tube bundle, and by adjusting the pulling force of the two drive chains 4, the pulling posture of the tube bundle is adjusted so that the pulling force of the tube bundle is different, thereby avoiding tilting of the tube bundle during movement and increasing the friction between the tube bundle and the heat exchanger.

[0056] The power output of the first power unit 34 driving the power wheel 31 is independent of each other. By pushing and pulling the tube bundle separately, the output power at each position is reduced, so that the first power unit 34 can also complete the power output as a motor, avoiding the use of a hydraulic system to generate thrust, and realizing the electrification control of the tube bundle push-pull device.

[0057] The transfer frame 2 has mounting openings 25 arranged side by side, with adjacent mounting openings 25 facing each other. A chain storage roller 26 is detachably installed within each mounting opening 25. Screws are threaded to both ends of each chain roller 26. The chain roller 26 is placed within the mounting opening 25, and the screws are tightened to secure it. The drive chain 4 reciprocates and winds around the chain rollers 26 in sequence. The more drive chains 4 are wound around the chain rollers 26, the longer the distance between the two ends of the drive chain 4. Conversely, the fewer drive chains 4 are wound around the chain rollers 26, the shorter the distance between the two ends of the drive chain 4.

[0058] Figure 5 A top view of the rotating component according to the first embodiment of the present invention is shown. Figure 6 A top view of the biasing mechanism according to the first embodiment of the present invention is shown. (In conjunction with...) Figures 1-7As shown, rotating members 6 are provided at both ends of the drive chain 4. The rotating member 6 includes: a fixed member 61 connected to the drive chain 4, a rotating block 62 rotatably disposed on the fixed member 61, and a first expansion member 63 movably disposed on the rotating block 62. The rotating block 62 abuts against the end face of the tube bundle, and the first expansion member 63 is inserted into the tube bundle and expands to contact the inside of the tube bundle.

[0059] The first expansion member 63 includes an expansion rod 631 threadedly connected to a rotating block 62 and expansion blocks 632 disposed opposite to each other on both sides of the expansion rod 631. The expansion blocks 632 are slidably connected to the rotating block 62. A first elastic device 621 is disposed within the rotating block 62, which pushes the expansion blocks 632 out of the tube bundle. For example, the first elastic device 621 is a spring. A cone 633 is disposed on the expansion rod 631. Twisting the expansion rod 631 causes the cone 633 to move closer to the expansion blocks 632, pushing the expansion blocks 632 into contact with the tube bundle. Twisting the expansion rod 631 in the opposite direction causes the cone 633 to disengage from the expansion blocks 632, and the cone 633 no longer pushes the expansion blocks 632. Twisting the expansion rod 631 can fix or loosen the connection between the rotating block 62 and the tube bundle.

[0060] The tube bundle can move not only linearly but also helically. During the eccentric movement of the heat exchanger, the tube bundle will rotate to a certain extent, resulting in its helical movement. Since the tube bundle is rotating during helical movement, the rotating component 6 prevents interference between the tube bundle and the drive chain 4.

[0061] The fixed component 61 and the rotating block 62 are rotatably connected by a shaft and a bearing. The rotating block 62 has a shaft, and the fixed component 61 houses the bearing, which is then mounted on the shaft. Because the drive chain 4 pushes the tube bundle to the middle position on the left side, the fixed component 61 and the rotating block 62 are relatively small, and the shaft and bearing are correspondingly small. Because the drive chain 4 pulls the tube bundle to the right side to adjust its pulling posture, the fixed component 61 and the rotating block 62 are relatively large, and the shaft and bearing are correspondingly large.

[0062] The eccentric mechanism 5 includes a bent member 51 mounted on the frame 11 surrounding the heat exchanger, a movable actuating block 52 mounted on the bent member 51, an actuating rod 53 connected to the actuating block 52, and a second expansion member 54 mounted on the actuating rod 53. The actuating rod 53 is positioned close to the heat exchanger end face, and the second expansion member 54 is inserted into the heat exchanger end face. The heat exchanger end face is connected to an end cover via a flange, and the second expansion member 54 is inserted into a flange hole at the heat exchanger end face location and expands.

[0063] The bent piece 51 is parallel to the outer surface of the heat exchanger. A second rack 511 is provided along the bent piece 51. Guide rails 512 are provided on both sides of the second rack 511 along the bent piece 51. An actuating block 52 is slidably connected to the guide rails 512. A second gear 521 is rotatably provided on the actuating block 52. A third power device 522 is provided on the actuating block 52.

[0064] The third power unit 522 drives the second gear 521 to rotate. The second gear 521 rolls along the second rack 511, causing the actuating block 52 to slide along the guide rail 512. The actuating block 52 causes the actuating rod 53 to swing, and the actuating rod 53 causes the heat exchanger to deflect at a certain angle.

[0065] The structure of the second expansion member 54 is the same as that of the first expansion member 63. The second expansion member 54 is inserted into the outer side of the heat exchanger end face to complete the fixed connection between the actuating rod 53 and the heat exchanger.

[0066] The eccentric mechanism 5 is located at both ends of the heat exchanger, driving the heat exchanger to eccentricate from both sides to ensure uniform force distribution and prevent deformation of the tube bundle during eccentrication. To avoid interference between the eccentric mechanism 5 and the heat exchanger during placement, the actuating rod 53 is designed to be detachable. After the actuating rod 53 is inserted into the actuating block 52, a pin is inserted into the actuating block 52, with the pin passing through the actuating rod 53. To remove the actuating rod 53, simply pull out the pin.

[0067] Drive chain 4 pushes the tube bundle from the left end and pulls it from the right end, thus achieving linear movement of the tube bundle. The tube bundle is installed inside the heat exchanger, and when it needs to be removed, the contact between the tube bundle and the heat exchanger generates significant friction. This application reduces the amount of force required at a single location by applying force simultaneously from both ends of the tube bundle during movement. Furthermore, by adjusting the orientation of the right end of the tube bundle, it ensures a horizontal state during removal, thereby reducing friction between the tube bundle and the heat exchanger. However, situations can still occur where the tube bundle gets stuck in the heat exchanger due to excessive friction during removal. In such cases, increasing the applied force, coupled with the special structure of the tube bundle in this application, can cause deformation of the tube bundle.

[0068] This application connects the end face position of the heat exchanger through the eccentric mechanism 5, so that during the linear movement of the tube bundle, the eccentric mechanism 5 drives the heat exchanger to deflect at a certain angle, so that the tube bundle can be moved out without the need for additional force.

[0069] The tube bundle push-pull device also includes a lifting mechanism 7. The lifting mechanism 7 includes a lifting block 71, a first lifting plate 72 for placing the heat exchanger, and a second lifting plate 73 for restricting the position of the heat exchanger. The first lifting plate 72 is movably mounted on the lifting block 71, and the second lifting plate 73 is located on both sides of the first lifting plate 72.

[0070] In order to achieve the deflection of the heat exchanger, the bending member 51 needs to be parallel to the heat exchanger to complete the deflection. The lifting mechanism 7 is used to move the heat exchanger up and down to keep the heat exchanger and the moving frame 2 on the same central axis.

[0071] A fourth power unit 711 is provided on the lifting block 71, and a fifth power unit 712 is located on both sides of the lifting block 71. For example, the fourth power unit 711 is a heavy-duty electric pusher cylinder. For example, the fifth power unit 712 is an electric pusher cylinder. The fourth power unit 711 pushes the first lifting plate 72 up and down, and the first lifting plate 72 drives the heat exchanger to move up and down. The fifth power unit 712 pushes the second lifting plate 73 up and down, and the second lifting plate 73 contacts the side of the lower end of the heat exchanger, restricting the front-rear position of the heat exchanger and preventing the heat exchanger from detaching from the first lifting plate 72 during deviation.

[0072] Second embodiment:

[0073] The tube bundle push-pull method includes the following steps:

[0074] Calculation steps: Determine the heat exchanger lifting height data, tube bundle removal distance data, and tube bundle push-pull force data based on the heat exchanger data and tube bundle data.

[0075] The lifting height of the heat exchanger is determined based on its dimensions. The tube bundle removal distance is determined based on the dimensions of the heat exchanger, the type of tube bundle, and the size of the tube bundle. The thrust of the drive chain 4 to the tube bundle, the pull of the drive chain 4 to the tube bundle, and the rotational force of the eccentric mechanism 5 to the heat exchanger are determined based on the dimensions of the heat exchanger, its aging condition, the type of tube bundle, the size of the tube bundle, and the aging condition of the tube bundle.

[0076] Preparation steps: The heat exchanger is hoisted into the frame 11, and the lifting block 71 supports the heat exchanger. According to the lifting height data of the heat exchanger, the fourth power unit 711 drives the first lifting plate 72 to move along the lifting block 71, raising the heat exchanger to a certain height. The fifth power unit 712 drives the second lifting plate 73 to move, restricting the front and rear sides of the heat exchanger.

[0077] Adjust the clamping ends of the frame block 12 and the clamping device 13 to a suitable angle, so that the clamping ends of the frame block 12 and the clamping device 13 are close to each other to restrict the heat exchanger ends.

[0078] The shifter 2 moves to the left along the frame 11, approaching the heat exchanger. The shifter 2 is located on both the front and rear sides of the heat exchanger. Remove the left and right chain rollers 26, ensuring that the left and right ends of the drive chain 4 can extend to a sufficient length. Pass the drive chain 4 through the meshing bracket 15, install the fixing piece 61 on the drive chain 4, and position the rotating block 62 against the middle of the tube bundle end face. Insert the first expansion member 63 into the tube bundle, and expand outward to contact the tube bundle. Install the actuating rod 53 on the actuating block 52, and insert the second expansion member 54 into the edge of the heat exchanger end face, expanding outward to contact the flange hole of the heat exchanger.

[0079] Push-pull steps: Based on the tube bundle displacement distance data and tube bundle push-pull force data, the first power unit 34 outputs the set power, and one end of the drive chain 4 meshes with each other to push the tube bundle, while the other end of the drive chain 4 pulls the tube bundle.

[0080] When the upper limit of the tube bundle bearing force value is close to the tube bundle push-pull force value value, the actuating block 52 moves along the bend 51, causing the heat exchanger to deflect at a certain angle.

[0081] After the tube bundle moves a certain distance to the right out of the heat exchanger, the right-side drive wheel rotates in the opposite direction, releasing the length of the right end of the drive chain 4. The left-side chain roller 26 is removed, releasing the length of the left end of the drive chain 4. The moving frame 2 moves a certain distance to the right. After repeating the push-pull steps multiple times, the tube bundle is completely removed from the heat exchanger.

[0082] The above steps describe the tube bundle push-pull method for removing the tube bundle from the heat exchanger. After the tube bundle is cleaned and repaired, it needs to be reinstalled, or it needs to be installed into the heat exchanger during production. Place the tube bundle on the left side of the frame 11 in a left-right direction, and place the heat exchanger on the right side of the frame 11 in a left-right direction. Repeat the above steps.

[0083] If the placement angle of the heat exchanger deviates during placement, the angle needs to be adjusted. In this application, a deflection mechanism 5 drives the heat exchanger to deflect by a certain angle. A third power device 522 drives the second gear 521 to rotate. The second gear 521 rolls along the second rack 511, causing the actuating block 52 to slide along the guide rail 512. The actuating block 52 drives the actuating rod 53 to swing, and the actuating rod 53 causes the heat exchanger to deflect by a certain angle. After the heat exchanger is deflected by a certain angle, the installation angles of the heat exchanger and the tube bundle are aligned to ensure the correct installation position of the heat exchanger and the tube bundle.

[0084] During the assembly of the tube bundle and the heat exchanger, it is necessary to ensure that the installation angle of the tube bundle matches that of the heat exchanger. This is to ensure that the tube bundle does not interfere with other components inside the heat exchanger during installation, and to avoid damaging or deforming the tube bundle.

[0085] The installation angle of the tube bundle and heat exchanger is the angle between the tube bundle and the heat exchanger around their left-right axes. This ensures that the tube bundle can avoid collisions with other components inside the heat exchanger during installation. Since other components are located inside the heat exchanger, if the tube bundle interferes, it will have already deformed due to the collision. In this case, the tube bundle needs to be extracted for repair or replaced and reinstalled. To ensure smooth installation of the tube bundle and heat exchanger, the installation angle of the tube bundle and the installation angle of the heat exchanger must be matched.

[0086] In addition to aligning the installation angles, the tube bundle and heat exchanger also need to be installed coaxially during installation.

[0087] Before installation, the heat exchanger is placed on the moving frame 2. The fourth power unit 711 pushes the first lifting plate 72 up and down, which in turn moves the heat exchanger up and down to determine its height. The fifth power unit 712 pushes the second lifting plate 73 up and down. The second lifting plate 73 contacts the side of the lower end of the heat exchanger, restricting its front-to-back position and preventing it from detaching from the first lifting plate 72 during tilting, thus limiting its horizontal position.

[0088] During installation, one end of the drive chains 4 meshes with each other, generating a thrust on the tube bundle, while the other end of the drive chains 4 generates a pull on two positions on the end face of the tube bundle. By adjusting the pull of the two drive chains 4, the pull of the tube bundle is adjusted so that the pull of the tube bundle is different, thus ensuring that the tube bundle and the heat exchanger are coaxial during installation. This prevents the tube bundle from tilting during movement, which would increase friction between the tube bundle and the heat exchanger.

[0089] If the tube bundle tilts during movement, the pulling posture of the tube bundle is readjusted by adjusting the tension value at the other end of the drive chains 4 on both sides, so that the tube bundle is coaxial with the heat exchanger again. This ensures that the tube bundle and the heat exchanger are always coaxial during the installation process, preventing tilting of the tube bundle during movement and avoiding scratches on the inner surface of the heat exchanger.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A tube bundle push-pull device, characterized in that, include: Support (1); The movable frame (2) is moved and set on the support (1); The drive wheel assembly (3) is rotatably mounted on the transfer frame (2); The drive chain (4) is wound around the drive wheel assembly (3); Bias mechanism (5); The heat exchanger is placed inside the support (1), and the moving frame (2) is located on both sides of the heat exchanger; the eccentric mechanism (5) is connected to the heat exchanger, and the eccentric mechanism (5) moves along the moving frame (2) to drive the heat exchanger to eccentricate; after one end of the drive chain (4) on both sides meshes with each other, it pushes the tube bundle from the direction of tube bundle removal; the other end of the drive chain (4) on both sides pulls the tube bundle from the direction of tube bundle removal. The support (1) includes a frame (11), a support block (12) that abuts against the heat exchanger, and a pressing device (13) that presses the heat exchanger. The drive wheel assembly (3) includes: a power wheel (31) rotatably disposed on the frame (11) near both ends of the heat exchanger, a direction wheel (32) rotatably disposed on the frame (11) near both ends of the tube bundle, and a tension wheel (33) rotatably disposed on the frame (11) near the power wheel (31); wherein, a first power device (34) is provided on the moving frame (2), and the first power device (34) drives each of the power wheels (31) to rotate; Rotating components (6) are provided at both ends of the drive chain (4); the rotating component (6) includes: a fixing component (61) connected to the drive chain (4), a rotating block (62) rotatably disposed on the fixing component (61), and a first expansion component (63) movably disposed on the rotating block (62); wherein, the rotating block (62) abuts against the end face of the tube bundle, and the first expansion component (63) is inserted into the tube bundle and expands to contact the inside of the tube bundle; The frame (11) is provided with a meshing bracket (15), and a meshing channel is formed inside the meshing bracket (15); after one end of the drive chain (4) on both sides enters the meshing channel, it changes the direction of movement and meshes with each other before moving out.

2. The tube bundle push-pull device as described in claim 1, characterized in that, A notch (14) is formed on the frame (11); the frame block (12) and the clamping device (13) are arranged opposite to each other at both ends in the notch (14), such that when the heat exchanger is placed in the notch (14), both ends of the heat exchanger are placed between the clamping ends of the frame block (12) and the clamping device (13).

3. The tube bundle push-pull device as described in claim 2, characterized in that, The transfer frame (2) is rotatably provided with a roller (21); a first gear (22) is coaxially provided on the roller (21); a first rack (23) is provided on the frame (11) along the tube bundle moving direction; the first gear (22) meshes with the first rack (23); a moving space (24) is formed on the frame (11) along the tube bundle moving direction, and the roller (21) rolls along the moving space (24).

4. The tube bundle push-pull device as described in claim 3, characterized in that, The biasing mechanism (5) includes a bent piece (51) arranged around the heat exchanger on the frame (11), a movable actuating block (52) arranged on the bent piece (51), an actuating rod (53) connected to the actuating block (52), and a second expansion member (54) arranged on the actuating rod (53); wherein the actuating rod (53) is close to the end face of the heat exchanger, and the second expansion member (54) is inserted into the end face of the heat exchanger.

5. The tube bundle push-pull device as described in claim 4, characterized in that, It also includes a lifting mechanism (7); the lifting mechanism (7) includes a lifting block (71), a first lifting plate (72) for placing the heat exchanger and a second lifting plate (73) for restricting the position of the heat exchanger; the first lifting plate (72) is movably disposed on the lifting block (71), and the second lifting plate (73) is located on both sides of the first lifting plate (72).

6. A tube bundle push-pull method, using the tube bundle push-pull device as described in claim 5, characterized in that, Includes the following steps: Calculation steps: Based on the heat exchanger data and tube bundle data, determine the heat exchanger lifting height data, tube bundle removal distance data, and tube bundle push-pull force value data; Preparation steps: Hoist the heat exchanger into the frame (11); according to the lifting height data of the heat exchanger, the first lifting plate (72) moves along the lifting block (71) to raise the heat exchanger to a certain height; the clamping ends of the frame block (12) and the clamping device (13) clamp the two ends of the heat exchanger; the moving frame (2) moves along the frame (11) to approach the heat exchanger, the rotating part (6) abuts against the tube bundle and inserts into the tube bundle, and the second expansion part (54) is inserted into the heat exchanger; Push and pull steps: according to the tube bundle removal distance data and the tube bundle push and pull force value data, the first power device (34) outputs the set power, one end of the drive chain (4) meshes with each other and pushes the tube bundle, and the other end of the drive chain (4) pulls the tube bundle; when the upper limit data of the tube bundle bearing force value is close to the tube bundle push and pull force value data, the actuating block (52) moves along the bending part (51) to drive the heat exchanger to deflect at a certain angle.

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