A reheater tube bank maintenance device with a support structure

Abstract

The application discloses a re-heater tube row overhauling device with a supporting structure and relates to the technical field of re-heater tube row overhauling. The re-heater tube row overhauling device with the supporting structure comprises a driving mechanism, a pipeline self-adapting mechanism, an air tightness detecting mechanism, a polishing mechanism and a welding mechanism. The driving mechanism comprises a driving motor, a driving gear, a synchronous belt and transmission gears. The driving motor drives the driving gear to rotate, the driving gear drives the synchronous belt to rotate, the synchronous belt drives each transmission gear to rotate, and each transmission gear transmits power to corresponding mechanisms. The pipeline self-adapting mechanism comprises a fixed frame A, a movable frame A and rollers. The movable frame A and the movable frame C are rotated to make the tube row rotate at multiple angles. The rollers are pressed on the surface of the tube row to realize positioning of the tube row with different diameters. The polishing mechanism is used for polishing the cross section of the tube row. The welding mechanism is used for welding two tube rows. The air tightness detecting mechanism is used for air tightness detection.

Description

Technical Field

[0001] This invention relates to the field of reheater tube bank maintenance technology, specifically to a reheater tube bank maintenance device with a support structure. Background Technology

[0002] During the use and production of reheaters, it is often necessary to repair and inspect the reheater tube bank. Currently, manual repair and inspection are mainly carried out by staff who grind, weld, and inspect the tube bank. The quality of tube bank repair is difficult to determine. At the same time, this method is time-consuming and labor-intensive, and it is difficult to meet the production maintenance requirements of enterprises. Currently, there is a tube bank fixing device for boiler reheater maintenance (patent number: CN 216814138 U), which uses multiple rotating columns to raise the tube bank. Although it can facilitate the staff to carry out repairs to a certain extent, it also has certain problems: (1) there is no welding for automatic centering during the repair process; (2) the tube bank is fixed by bolt pressure, which has poor stability and the tube bank is easy to deform; (3) it cannot adapt to the fixing of bent tube banks.

[0003] A screen-type superheater tube bank on-site welding alignment device (patent number: CN 215919583 U) uses multiple positioning holes on the base plate to position the tube bank. The corresponding diameter holes are machined for different tube banks to ensure the concentricity and accuracy between tube banks. Although this method can solve some of the above problems, it also has some problems. (1) It can only position tube banks of the corresponding diameter, and cannot adapt to multiple tube bank diameters, so its versatility is poor. (2) The device has no welding mechanism, so manual welding is still required. The welding quality is not uniform, which is not conducive to subsequent maintenance and repair. (3) The positioning holes on the base plate are used for a long time, and the accuracy is reduced, making it difficult to guarantee subsequent positioning performance. It has poor practicality. (4) There is no pipeline inspection function. The staff are not clear about the pipeline quality, which may make subsequent operations redundant. Summary of the Invention

[0004] The purpose of this invention is to provide a reheater tube bank maintenance device with a support structure to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] The system includes an upper casing, an outer casing mounted on its lower side, and pipe row adaptive mechanisms mirror-mounted on both sides of the outer casing. A pipe row is positioned in the center of each pipe row adaptive mechanism. An intermediate casing A is installed inside the outer casing. Another set of pipe row adaptive mechanisms is mirror-mounted on both sides of the intermediate casing A. Grinding mechanisms are installed at both ends of one side of the intermediate casing A, and an airtightness detection mechanism is installed on one side of each grinding mechanism. A left-side partition is installed below one side of the intermediate casing A. Two sets of dust removal mechanisms are installed on the outer side of the intermediate casing A. An intermediate casing B is installed in the middle of the intermediate casing A. An automatic welding mechanism is installed on one side of the intermediate casing B, and an automatic welding mechanism is installed on the other side of the intermediate casing B. Equipped with another set of airtightness testing mechanisms, a bottom partition is installed below the intermediate housing A, a drive mechanism is installed below the bottom partition, a lower housing is installed below the drive mechanism, the pipe row adaptive mechanism can adapt to pipe rows of different diameters and angles, the grinding mechanism can grind the cross-section of the pipe row, the automatic welding mechanism can perform combined welding of the pipe rows, the dust removal mechanism adsorbs the generated dust and powder, the airtightness testing mechanism can test the sealing performance of the pipe rows, the drive mechanism can transmit power to the above-mentioned mechanisms, one set of pipe row adaptive mechanisms is used to position one end of the pipe row, and the other set of pipe row adaptive mechanisms is used to position the other end of the pipe row.

[0007] The upper housing is equipped with a control panel, which contains a control system. The control panel includes a start button, a stop button, an emergency stop button, a dust removal button, and a buzzer. The upper housing has observation ports A and B, which are made of transparent acrylic. The upper housing also has a water inlet, which is connected to a water pipe via a conduit.

[0008] The drive mechanism includes a drive motor, a synchronous belt, a drive gear, and a transmission gear A. The drive motor is mounted on the upper housing, and the drive gear is mounted on the output shaft of the drive motor. The drive gear is mounted at the four corners of the upper side of the lower housing. The synchronous belt meshes with the outer side of the drive gear, and the synchronous belt simultaneously meshes with transmission gear A and transmission gear B. Transmission gear C and transmission gear D are respectively meshed on one side of transmission gear A and transmission gear B. A first guide post and a second guide post are respectively installed in the middle of transmission gear C and transmission gear D. A first bearing and a pawl disc A are sequentially mounted axially on the first guide post. A cam A is mounted on the outer side of the first bearing. The upper side of the middle part of the cam A has a first bearing hole. The lower side of the middle part of the cam A is provided with a ratchet tooth structure. A first boss is provided on the lower side of the pawl disc A. A first torsion spring is mounted on the first boss. Pawl A is rotatably connected to the first boss through the first torsion spring. An electromagnet A is mounted on one side of the pawl A and is mounted on the lower side of the pawl disc A.

[0009] The dust removal mechanism includes a dust removal hood A, a dust removal hood B, a cam B, and an air storage bag. A protective cover is installed below the center of the left partition. Cams A and B are respectively installed below the two sides of the left partition. A telescopic frame A is installed on one side of cam A and is slidably mounted on one side of the protective cover. A return spring A is provided on the telescopic frame A, with one end of the return spring A installed on one side of the protective cover. A water bag is installed on one side of the telescopic frame A, and the water bag is provided with a water outlet pipe and a water inlet pipe. A telescopic frame B is installed on one side of cam B and is provided with a return spring B. An air storage bag is installed on one side of the telescopic frame B, and the air storage bag is provided with an air inlet pipe and an air outlet pipe. The air inlet pipe is connected to dust removal hoods A and B.

[0010] The airtightness testing mechanism includes an airtight isolation cover, a sliding plate, a sliding shaft, and a water bag. An airtight isolation cover is installed on the intermediate housing A. Sliding shafts are installed on both sides inside the airtight isolation cover. A sliding plate is slidably installed on the sliding shafts. An inlet and an outlet are provided on one side of the airtight isolation cover. The inlet is connected to an outlet pipe, and the outlet is connected to a water injection pipe. Flow meters are installed inside the inlet and outlet.

[0011] The second guide post axial mounting structure is the same as the first guide post axial mounting structure, except that: the pawl A and pawl B are mirror images of each other, and the ratchet tooth structure on the lower side of the cam A and cam B is mirror images of each other; a bellows is installed on the sleeve A, and the bellows is a force-bearing telescopic mechanism, which lengthens when stretched and retracts when not stretched.

[0012] The drive motor drives the drive gear to rotate, which in turn drives the synchronous belt to rotate. The synchronous belt drives transmission gears A and B to rotate synchronously. Transmission gear A drives transmission gear D to rotate, and transmission gear B drives transmission gear C to rotate. Transmission gears C and D respectively drive the first guide post and the second guide post to rotate. The first guide post drives the pawl disc A to rotate, energizing electromagnet A. Electromagnet A is installed in reverse, and the telescopic rod inside electromagnet A pushes out the pawl A to engage with cam A. Therefore, the pawl disc A drives cam A to rotate. When cam A moves to its maximum stroke, cam A pushes the telescopic frame A to move and... The compression return spring A and the telescopic frame A compress the water bag, causing the liquid inside the water bag to flow through the outlet pipe into the sleeves A and B. At this time, the bellows forms a seal on the location of the sleeves A, B, and pipe bank. After the cam A compresses the water bag multiple times, the sealed cavity formed by the bellows of the sleeves A, B, and pipe bank is pressurized. The flow rate in the sealed cavity is detected by the flow meter. If the flow rate decreases after stabilization, the pipe bank is damaged or there is a problem with the welding. If the flow rate remains almost unchanged after stabilization, there is no problem. After confirming that there is no problem, the liquid inside the sealed cavity is discharged into the water bag through the outlet for recycling.

[0013] At the same time, the telescopic frame A presses the water bag, causing the liquid inside the water bag to reach the inlet through the outlet pipe. The pressure inside the airtight isolation cover gradually increases, and the liquid pushes the sliding plate on the sliding shaft to move towards the center of the pipe bank. One end of the sliding plate is pressed against the side of the pipe bank. After multiple sliding plates press the outer surface of the pipe bank, the pipe bank is sealed. It is used in conjunction with the corrugated pipe to improve the sealing performance.

[0014] At the same time, the second guide column drives the cam B to rotate, and the transmission process is the same as that of the first guide column. When the electromagnet B is energized, when the cam B moves to its maximum stroke, the cam B pushes the telescopic frame B to move and compresses the return spring B. The telescopic frame B presses the air storage bag, and the gas in the dust collector A and dust collector B enters the air storage bag through the air inlet pipe, causing a negative pressure to be generated in the dust collector A and dust collector B. The dust collector A and dust collector B adsorb and settle the dust.

[0015] The pipe-row adaptive mechanism includes a fixed frame A, a movable frame A, and a movable frame C. The fixed frame A is mounted on the outer casing. A direction control motor B is mounted on one side of the fixed frame A. A rotating shaft A is mounted on the other side of the inner wall of the fixed frame A. The movable frame A is mounted on one side of the rotating shaft A. A direction control motor A is mounted on one side of the movable frame A. The rotating shaft B is mounted on the other side of the inner wall of the movable frame A. A sleeve A is mounted on one side of the rotating shaft B. Multiple first rotating grooves are provided on the inner wall of the sleeve A. A connecting rod A is rotatably connected in the first rotating groove. A connecting rod B is rotatably connected to one end of the connecting rod A. A roller is rotatably connected to one end of the connecting rod B. A telescopic belt is mounted on the outside of the roller. First tension springs are mounted at both ends of the telescopic belt. A second torsion spring is provided at the rotatable connection between the connecting rod A and the connecting rod B. The roller has an internal electric roller structure.

[0016] Directional control motor B drives movable frame A to rotate laterally along rotation axis A, and directional control motor A drives movable frame B to rotate longitudinally along rotation axis. Movable frame B drives sleeve A to rotate synchronously, and sleeve A drives the pipe bank to rotate synchronously. Through the above design, the pipe bank can rotate at any angle within a certain range under the combined action of directional control motor A and directional control motor B, which can adapt to different pipe bank bending angles. At the same time, when the pipe bank enters sleeve A, the distance between the roller and sleeve A is increased, and under the combined action of connecting rod A, connecting rod B, and the first tension spring, the roller is pressed against the outer surface of the pipe bank. The roller can drive the pipe bank to rotate inside sleeve A. Through the above design, it can adapt to different pipe bank diameters.

[0017] The grinding mechanism includes an adjusting motor, a drive wheel, and a rotating plate A. The adjusting motor is mounted on the intermediate housing A, and the drive wheel is mounted on the output shaft of the adjusting motor. The drive wheel is mounted on one side of the intermediate housing A. Driven wheels A and B are respectively meshed on both sides of the drive wheel. A grooved wheel A is concentrically mounted on driven wheel A, and a grooved wheel B is concentrically mounted on driven wheel B. A transmission belt B is mounted on the outer side of the grooved wheel A, and an auxiliary wheel is mounted on the inner side of the transmission belt B. A rotating plate A is mounted on the outer side of the transmission belt B. The rotating plate A is suspended on the intermediate housing A via the auxiliary wheel. A transmission belt A is mounted on the outer side of the grooved wheel B, and an auxiliary wheel is mounted on the inner side of the transmission belt A. Multiple auxiliary wheels are equidistantly mounted along the center line of the fixed frame A. The auxiliary wheels are mounted on the intermediate housing A, and the rotating plate B is mounted on the outer side of the transmission belt A. Grinding discs are provided on one side of the rotating plate A and the rotating plate B.

[0018] The regulating motor drives the driving wheel to rotate, which in turn drives driven wheels A and B to rotate. Driven wheels A and B then drive grooved wheels A and B to rotate synchronously. Grooved wheels A and B then drive transmission belts B and A to rotate, which in turn drive rotating plates A and B to rotate. This causes the grinding discs on rotating plates A and B to contact the sides of the pipe bank, thus grinding the sides of the pipe bank.

[0019] The automatic welding mechanism includes a drive shaft, an automatic welding torch, and a welding isolation cover. The drive shaft is installed on one side of the intermediate housing A, and a driven wheel C is installed at one end of the drive shaft. The driven wheel C meshes with the driven wheel B, and the automatic welding torch is installed in the middle of the drive shaft. The driven wheel B drives the driven wheel C to rotate, and the driven wheel C drives the drive shaft to rotate. The drive shaft presses the automatic welding torch against the joint of the two pipe rows after grinding. Under the action of the pipe row self-adaptive mechanism, the rollers inside the sleeve A drive the pipe rows to rotate, thus welding the joint of the two pipe rows after grinding.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] 1. Adaptive to pipe diameter and bending dimensions, highly versatile. Directional control motor B drives movable frame A to rotate laterally along rotation axis A, and directional control motor A drives movable frame B to rotate longitudinally along rotation axis. Movable frame B drives sleeve A to rotate synchronously, and sleeve A drives the pipe bank to rotate synchronously. Through this design, the pipe bank can rotate at any angle within a certain range under the combined action of directional control motors A and B, adapting to different pipe bank bending angles. Simultaneously, when the pipe bank enters sleeve A, the distance between the rollers and sleeve A is increased, and under the combined action of connecting rod A, connecting rod B, and the first tension spring, the rollers are pressed against the outer surface of the pipe bank. The rollers can drive the pipe bank to rotate within sleeve A. Through this design, it can adapt to different pipe bank diameters and bending angles.

[0022] 2. The combination of cross-section grinding, automatic butt welding, and dust removal and adsorption functions better meets the actual needs of maintenance. The adjustment motor drives the drive wheel to rotate, which in turn drives driven wheel A and driven wheel B to rotate. Driven wheel A and driven wheel B drive grooved wheel A and grooved wheel B to rotate synchronously. Grooved wheel A and grooved wheel B drive transmission belt B and transmission belt A to rotate. Transmission belt B and transmission belt A drive rotating plate A and rotating plate B to rotate, so that the grinding discs on rotating plate A and rotating plate B contact the side of the pipe bank to perform grinding treatment on the side of the pipe bank.

[0023] When electromagnet B is energized, as cam B moves to its maximum stroke, cam B pushes telescopic frame B to move and compresses return spring B. Telescopic frame B presses against the air storage bag, and the gas inside dust collector A and dust collector B enters the air storage bag through the air inlet pipe, creating a negative pressure inside dust collector A and dust collector B. Dust collector A and dust collector B then adsorb and settle dust and particulate matter.

[0024] Driven by driven wheel B, driven wheel C rotates, which in turn drives the drive shaft to rotate. The drive shaft presses the automatic welding torch against the joint of the two pipe banks after grinding. Under the action of the pipe bank self-adaptive mechanism, the rollers inside sleeve A drive the pipe bank to rotate, thus welding the joint of the two pipe banks after grinding.

[0025] 3. The integrated design of gas and water storage functions makes the structure more compact, with a high recycling rate, saving energy and protecting the environment.

[0026] Cam A pushes telescopic frame A to move and compresses return spring A. Telescopic frame A presses the water bag, causing the liquid inside the water bag to flow through the outlet pipe into sleeve A and sleeve B. At this time, the bellows forms a seal on the location of sleeve A, sleeve B, and pipe bank. After cam A compresses the water bag multiple times, the sealed cavity formed by sleeve A, sleeve B, and pipe bank through the bellows is pressurized. The liquid inside the sealed cavity is discharged into the water bag through the outlet for recycling. Cam B pushes telescopic frame B to move and compresses return spring B. Telescopic frame B presses the air storage bag, and the gas inside dust collector hoods A and B enters the air storage bag through the inlet pipe, creating negative pressure inside dust collector hoods A and B. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of the device;

[0029] Figure 2 yes Figure 1 A structural diagram with the upper casing and its components removed;

[0030] Figure 3 yes Figure 2 A magnified view of part A in the image;

[0031] Figure 4 yes Figure 2 A structural diagram with components such as the outer casing removed;

[0032] Figure 5 yes Figure 4 Top view;

[0033] Figure 6 yes Figure 5 A structural diagram with the left side partition removed;

[0034] Figure 7 yes Figure 6 A magnified view of part B in the image;

[0035] Figure 8 yes Figure 6 Top view after removing the lower casing;

[0036] Figure 9 This is a schematic diagram of the airtightness testing mechanism;

[0037] Figure 10 This is a schematic diagram of the assembly structure of components such as fixed frame A and movable frame A;

[0038] Figure 11 yes Figure 10 Enlarged view of a section in item C;

[0039] Figure 12 This is a schematic diagram of the installation structure of components such as cam A, pawl A, pawl disk A, and first guide post.

[0040] In the diagram: 1. Control panel; 11. Observation port A; 12. Drive motor; 13. Upper casing; 14. Outer casing; 15. Lower casing; 16. Pipeline; 17. Water inlet; 18. Observation port B; 19. Middle casing A; 191. Middle casing B; 192. Left side partition; 2. Bottom partition; 21. Fixed frame A; 211. Fixed frame B; 22. Movable frame A; 221. Movable frame B; 23. Movable frame C; 231 1. Movable frame D; 24. Sleeve A; 25. Direction control motor A; 251. Direction control motor B; 26. Rotating shaft A; 261. Rotating shaft B; 27. Telescopic belt; 271. First tension spring; 28. Roller; 281. Connecting rod A; 282. Connecting rod B; 3. Welded isolation cover; 31. Drive shaft; 4. Airtight isolation cover; 41. Sliding plate; 42. Sliding shaft; 43. Water inlet; 44. Water outlet; 5. Dust collector cover A; 501. Dust hood B; 51. Adjusting motor; 52. Driving pulley; 53. Driven pulley A; 531. Grooved pulley A; 54. Driven pulley B; 541. Grooved pulley B; 55. Drive belt A; 551. Drive belt B; 56. Auxiliary pulley; 57. Driven pulley C; 6. Rotating plate A; 61. Rotating plate B; 7. Synchronous belt; 71. Drive gear; 72. Transmission gear A; 721. Transmission gear B; 731. Transmission gear C; 731. 8. Transmission gear D; 9. Protective cover; 10. Water bag; 11. Air storage bag; 12. Cam A; 13. Cam B; 24. Telescopic frame A; 35. Telescopic frame B; 46. Return spring A; 47. Return spring B; 58. Air inlet pipe; 59. Water outlet pipe; 50. Water injection pipe; 60. First guide post; 71. Pawl A; 82. Pawl B; 93. Electromagnet A; 104. Pawl disc A; 11. Pawl disc B. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Please see Figures 1-12 The present invention provides the following technical solution:

[0043] The system includes an upper housing 13, an outer housing 14 mounted on the lower side of the upper housing 13, pipe row adaptive mechanisms mirror-mounted on both sides of the outer housing 14, a pipe row 16 located in the middle of the pipe row adaptive mechanism, an intermediate housing A19 mounted inside the outer housing 14, another set of pipe row adaptive mechanisms mirror-mounted on both sides of the intermediate housing A19, grinding mechanisms mounted at both ends on one side of the intermediate housing A19, an airtightness detection mechanism mounted on one side of the grinding mechanism, a left side partition 192 mounted on the lower side of one side of the intermediate housing A19, two sets of dust removal mechanisms mounted on the outer side of the intermediate housing A19, an intermediate housing B191 mounted in the middle of the intermediate housing A19, an automatic welding mechanism mounted on one side of the intermediate housing B191, and the intermediate housing... Another set of airtightness testing mechanisms is installed on the other side of B191. A bottom partition 2 is installed below the middle casing A19. A drive mechanism is installed below the bottom partition 2. A lower casing 15 is installed below the drive mechanism. The pipe row self-adaptive mechanism can adapt to pipe rows of different diameters and angles. The grinding mechanism can grind the cross-section of the pipe row 16. The automatic welding mechanism can perform combined welding of the pipe row 16. The dust removal mechanism adsorbs the generated dust and powder. The airtightness testing mechanism can test the sealing performance of the pipe row 16. The drive mechanism can transmit power to the above-mentioned mechanisms. One set of pipe row self-adaptive mechanisms is used to position one end of the pipe row 16, and another set of pipe row self-adaptive mechanisms is used to position the other end of the pipe row 16.

[0044] A control panel 1 is installed on the upper housing 13. The control panel 1 contains a control system and includes a start button, a stop button, an emergency stop button, a dust removal button, and a buzzer. The upper housing 13 has observation ports A11 and B18, which are made of transparent acrylic. The upper housing 13 also has a water inlet 17, which is connected to a water inlet pipe 852 via a pipe.

[0045] The drive mechanism includes a drive motor 12, a synchronous belt 7, a drive gear 71, and a transmission gear A72. The drive motor 12 is mounted on the upper housing 13. The drive gear 71 is mounted on the output shaft of the drive motor 12. The drive gear 71 is mounted at the four corners of the upper side of the lower housing 15. The synchronous belt 7 meshes with the outer side of the drive gear 71. Transmission gears A72 and B721 mesh simultaneously on the synchronous belt 7. Transmission gears C73 and D731 mesh with one side of each of the transmission gears A72 and B721, respectively. The middle part is equipped with a first guide post 86 and a second guide post. The first guide post 86 is axially mounted with a first bearing and a ratchet disk A89. A cam A82 is mounted on the outside of the first bearing. The upper part of the middle of the cam A82 has a first bearing hole. The lower part of the middle of the cam A82 is provided with a ratchet tooth structure. A first boss is provided on the lower side of the ratchet disk A89. A first torsion spring is mounted on the first boss. A ratchet A87 is rotatably connected to the first boss through the first torsion spring. An electromagnet A88 is mounted on one side of the ratchet A87. The electromagnet A88 is mounted on the lower side of the ratchet disk A89.

[0046] The dust removal mechanism includes a dust hood A5, a dust hood B501, a cam B821, and an air storage bag 811. A protective cover 8 is installed below the center of the left partition 192. Cams A82 and B821 are installed below the sides of the left partition 192, respectively. A telescopic frame A83 is installed on one side of cam A82. The telescopic frame A83 is slidably installed on one side of the protective cover 8. A return spring A84 is provided on the telescopic frame A83. One end of the return spring A84 is installed on... On one side of the protective cover 8 and the side of the telescopic frame A83, a water bag 81 is installed. The water bag 81 is equipped with a water outlet pipe 851 and a water inlet pipe 852. On one side of the cam B821, a telescopic frame B831 is installed. The telescopic frame B831 is equipped with a return spring B841. On one side of the telescopic frame B831, an air storage bag 811 is installed. The air storage bag 811 is equipped with an air inlet pipe 85 and an air outlet pipe 853. The air inlet pipe 85 is connected to the dust collector hood A5 and the dust collector hood B501.

[0047] The airtightness testing mechanism includes an airtight isolation cover 4, a sliding plate 41, a sliding shaft 42, and a water bag 81. The airtight isolation cover 4 is installed on the intermediate housing A19. The sliding shaft 42 is installed on both sides inside the airtight isolation cover 4. The sliding plate 41 is slidably installed on the sliding shaft 42. An inlet 43 and an outlet 44 are provided on one side of the airtight isolation cover 4. The inlet 43 is connected to the outlet pipe 851, and the outlet 44 is connected to the water injection pipe 852. Flow meters are installed inside the inlet 43 and the outlet 44.

[0048] The axial mounting structure of the second guide post is the same as that of the axial mounting structure of the first guide post 86. The difference is that the pawls A87 and B871 are mirror images, and the ratchet tooth structure on the lower side of the cams A82 and B821 is mirror image. Bellows are installed on the sleeves A24 and B241. The bellows is a force-bearing telescopic mechanism. When the bellows is stretched, it becomes longer. When the bellows is not stretched, it becomes retracted.

[0049] The drive motor 12 drives the drive gear 71 to rotate, which in turn drives the synchronous belt 7 to rotate. The synchronous belt 7 drives the transmission gears A72 and B721 to rotate synchronously. Transmission gear A72 drives the transmission gear D731 to rotate, and transmission gear B721 drives the transmission gear C73 to rotate. Transmission gears C73 and D731 respectively drive the first guide post 86 and the second guide post to rotate. The first guide post 86 drives the pawl disc A89 to rotate, energizing the electromagnet A88. Electromagnet A88 is installed in reverse, and the internal telescopic rod of electromagnet A88 pushes out the pawl A87 to engage with the cam A82. Therefore, the pawl disc A89 drives the cam A82 to rotate. When the cam A82 moves to its maximum stroke, the cam A82 pushes the extension rod... The telescopic frame A83 moves and compresses the return spring A84, and the telescopic frame A83 presses the water bag 81, so that the liquid in the water bag 81 passes through the water outlet pipe 851 to the inside of the sleeve A24 and the sleeve B241. At this time, the bellows forms a seal on the location of the sleeve A24, the sleeve B241 and the pipe row 16. After the cam A82 compresses the water bag multiple times, the sealed cavity formed by the sleeve A24, the sleeve B241 and the pipe row 16 through the bellows can be pressurized. The flow rate in the sealed cavity is detected by the flow meter. When the flow rate decreases after stabilization, the pipe row 16 is damaged or there is a problem with the welding. When the flow rate is almost unchanged after stabilization, there is no problem. After confirming that there is no problem, the liquid inside the sealed cavity is discharged into the water bag 81 through the water outlet 44 for recycling.

[0050] At the same time, the telescopic frame A83 presses the water bag 81, causing the liquid inside the water bag 81 to reach the inlet 43 through the outlet pipe 851. The pressure inside the airtight isolation cover 4 gradually increases, and the liquid pushes the sliding plate 41 on the sliding shaft 42 to move towards the center of the pipe bank 16, and presses one end of the sliding plate 41 against the side of the pipe bank 16. After multiple sliding plates 41 press the outer surface of the pipe bank 16, the pipe bank 16 is sealed, and it is used in conjunction with the corrugated pipe to improve the sealing performance.

[0051] Simultaneously, the second guide column drives the cam B821 to rotate, and the transmission process is the same as that of the first guide column 86. When the electromagnet B is energized, when the cam B821 moves to its maximum stroke, the cam B821 pushes the telescopic frame B831 to move and compresses the return spring B841. The telescopic frame B831 presses the air storage bag 811, and the gas in the dust collector hood A5 and dust collector hood B501 enters the air storage bag 811 through the air inlet pipe 85, causing a negative pressure to be generated in the dust collector hood A5 and dust collector hood B501. The dust collector hood A5 and dust collector hood B501 adsorb and settle dust and particulate matter.

[0052] The pipe arrangement adaptive mechanism includes a fixed frame A21, a movable frame A22, and a movable frame C23. The fixed frame A21 is mounted on the outer casing 14. A direction control motor B251 is mounted on one side of the fixed frame A21. A rotating shaft A26 is mounted on the other side of the inner wall of the fixed frame A21. The movable frame A22 is mounted on one side of the rotating shaft A26. A direction control motor A251 is mounted on one side of the movable frame A22. A rotating shaft B261 is mounted on the other side of the inner wall of the movable frame A22. The rotating shaft B261... A sleeve A24 is installed on the side. Multiple first rotating grooves are provided on the inner wall of the sleeve A24. A connecting rod A281 is rotatably connected in the first rotating groove. A connecting rod B282 is rotatably connected to one end of the connecting rod A281. A roller 28 is rotatably connected to one end of the connecting rod B282. A telescopic belt 27 is installed on the outside of the roller 28. A first tension spring 271 is installed at both ends of the telescopic belt 27. A second torsion spring is provided at the rotatable connection between the connecting rod A281 and the connecting rod B282. The roller 28 has an internal electric roller structure.

[0053] Directional control motor B251 drives movable frame A22 to rotate laterally along rotation axis A26, and directional control motor A25 drives movable frame B221 to rotate longitudinally along rotation axis 261. Movable frame B221 drives sleeve A24 to rotate synchronously, and sleeve A24 drives tube array 16 to rotate synchronously. Through the above design, tube array 16 can rotate at any angle within a certain range under the combined action of directional control motors A25 and B251, which can adapt to different bending angles of tube array 16. At the same time, when tube array 16 enters sleeve A24, the distance between roller 28 and sleeve A24 is increased, and under the combined action of connecting rod A281, connecting rod B282, and first tension spring 271, roller 28 is pressed against the outer surface of tube array 16. Roller 28 can drive tube array 16 to rotate inside sleeve A24. Through the above design, different diameters of tube array 16 can be adapted.

[0054] The grinding mechanism includes an adjusting motor 51, a drive wheel 52, and a rotating plate A6. The adjusting motor 51 is mounted on the intermediate housing A19. The drive wheel 52 is mounted on the output shaft of the adjusting motor 51 and is located on one side of the intermediate housing A19. Driven wheels A53 and B54 are respectively meshed on both sides of the drive wheel 52. A grooved wheel A531 is concentrically mounted on driven wheel A53, and a grooved wheel B541 is concentrically mounted on driven wheel B54. A transmission belt B551 is mounted on the outer side of the grooved wheel A531. An auxiliary wheel 56 is installed on the inner side of the drive belt B551, and a rotating plate A6 is installed on the outer side of the drive belt B551. The rotating plate A6 is suspended on the intermediate housing A19 via the auxiliary wheel 56. A drive belt A55 is installed on the outer side of the grooved wheel B541, and an auxiliary wheel 56 is installed on the inner side of the drive belt A55. Multiple auxiliary wheels 56 are installed at equal intervals along the center line of the fixed frame A21. The auxiliary wheels 56 are installed on the intermediate housing A19. A rotating plate B61 is installed on the outer side of the drive belt A55. A grinding disc is provided on one side of the rotating plate A6 and the rotating plate B61.

[0055] The adjusting motor 51 drives the driving wheel 52 to rotate, which in turn drives the driven wheels A53 and B54 to rotate. The driven wheels A53 and B54 then drive the grooved wheels A531 and B541 to rotate synchronously. The grooved wheels A531 and B541 then drive the transmission belts B551 and A55 to rotate, which in turn drive the rotating plates A6 and B61 to rotate. This causes the grinding discs on the rotating plates A6 and B61 to contact the sides of the tube bank 16, thus grinding the sides of the tube bank 16.

[0056] The automatic welding mechanism includes a drive shaft 31, an automatic welding torch, and a welding isolation cover 3. The drive shaft 31 is installed on one side of the intermediate housing A19, and a driven wheel C57 is installed on one side of the drive shaft 31. The driven wheel C57 meshes with the driven wheel B54. The automatic welding torch is installed in the middle of the drive shaft 31. The driven wheel B54 drives the driven wheel C57 to rotate, and the driven wheel C57 drives the drive shaft 31 to rotate. The drive shaft 31 presses the automatic welding torch against the joint of the two pipe rows 16 after grinding. Under the action of the pipe row self-adaptive mechanism, the roller 28 drives the pipe row 16 inside the sleeve A24 to rotate, and welds the joint of the two pipe rows 16 after grinding.

[0057] Working principle of the invention:

[0058] Press the start button on control panel 1 to power on the device. Electromagnets A88 and B are de-energized, and cam A82 and pawl A87 disengage. The device enters self-test mode. If a problem is found, the device buzzer will sound an alarm and provide real-time feedback to the control system. After the problem is resolved, the device will operate normally. If there is no problem, the operator will insert the pipe array into sleeves A24 and B241, and the pipe array will pass through the pipe array self-adaptive mechanism, the first airtightness test mechanism, the grinding mechanism, the automatic welding mechanism, and the second airtightness test mechanism in sequence. Through the above mechanisms, the automatic positioning of the pipe array, the initial test of the pipe array, the grinding of the pipe array, the welding of the pipe array, and the welding test of the pipe array can be realized step by step. The operator can check the status of the pipe array 16 through observation ports A and B on the upper housing 13 and add water to the water bag 81 through the water inlet 17.

[0059] Directional control motor B251 drives movable frame A22 to rotate laterally along rotation axis A26, and directional control motor A25 drives movable frame B221 to rotate longitudinally along rotation axis 261. Movable frame B221 drives sleeve A24 to rotate synchronously, and sleeve A24 drives tube array 16 to rotate synchronously. Through the above design, tube array 16 can rotate at any angle within a certain range under the combined action of directional control motors A25 and B251, which can adapt to different bending angles of tube array 16. At the same time, when tube array 16 enters sleeve A24, the distance between roller 28 and sleeve A24 is increased, and under the combined action of connecting rod A281, connecting rod B282, and first tension spring 271, roller 28 is pressed against the outer surface of tube array 16. Roller 28 can drive tube array 16 to rotate inside sleeve A24. Through the above design, different diameters of tube array 16 can be adapted.

[0060] The adjusting motor 51 drives the driving wheel 52 to rotate, which in turn drives the driven wheels A53 and B54 to rotate. The driven wheels A53 and B54 then drive the grooved wheels A531 and B541 to rotate synchronously. The grooved wheels A531 and B541 then drive the transmission belts B551 and A55 to rotate, which in turn drive the rotating plates A6 and B61 to rotate. This causes the grinding discs on the rotating plates A6 and B61 to contact the sides of the tube bank 16, thus grinding the sides of the tube bank 16.

[0061] The drive motor 12 drives the drive gear 71 to rotate, which in turn drives the synchronous belt 7 to rotate. The synchronous belt 7 drives the transmission gears A72 and B721 to rotate synchronously. Transmission gear A72 drives the transmission gear D731 to rotate, and transmission gear B721 drives the transmission gear C73 to rotate. Transmission gears C73 and D731 respectively drive the first guide post 86 and the second guide post to rotate. The first guide post 86 drives the pawl disc A89 to rotate, energizing the electromagnet A88. Electromagnet A88 is installed in reverse, and the internal telescopic rod of electromagnet A88 pushes out the pawl A87 to engage with the cam A82. Therefore, the pawl disc A89 drives the cam A82 to rotate. When the cam A82 moves to its maximum stroke, the cam A82 pushes the extension rod... The telescopic frame A83 moves and compresses the return spring A84, and the telescopic frame A83 presses the water bag 81, so that the liquid in the water bag 81 passes through the water outlet pipe 851 to the inside of the sleeve A24 and the sleeve B241. At this time, the bellows forms a seal on the location of the sleeve A24, the sleeve B241 and the pipe row 16. After the cam A82 compresses the water bag multiple times, the sealed cavity formed by the sleeve A24, the sleeve B241 and the pipe row 16 through the bellows can be pressurized. The flow rate in the sealed cavity is detected by the flow meter. When the flow rate decreases after stabilization, the pipe row 16 is damaged or there is a problem with the welding. When the flow rate is almost unchanged after stabilization, there is no problem. After confirming that there is no problem, the liquid inside the sealed cavity is discharged into the water bag 81 through the water outlet 44 for recycling.

[0062] At the same time, the telescopic frame A83 presses the water bag 81, causing the liquid inside the water bag 81 to reach the inlet 43 through the outlet pipe 851. The pressure inside the airtight isolation cover 4 gradually increases, and the liquid pushes the sliding plate 41 on the sliding shaft 42 to move towards the center of the pipe bank 16, and presses one end of the sliding plate 41 against the side of the pipe bank 16. After multiple sliding plates 41 press the outer surface of the pipe bank 16, the pipe bank 16 is sealed, and it is used in conjunction with the corrugated pipe to improve the sealing performance.

[0063] Simultaneously, the second guide column drives the cam B821 to rotate, and the transmission process is the same as that of the first guide column 86. When the electromagnet B is energized, when the cam B821 moves to its maximum stroke, the cam B821 pushes the telescopic frame B831 to move and compresses the return spring B841. The telescopic frame B831 presses the air storage bag 811, and the gas in the dust collector hood A5 and dust collector hood B501 enters the air storage bag 811 through the air inlet pipe 85, causing a negative pressure to be generated in the dust collector hood A5 and dust collector hood B501. The dust collector hood A5 and dust collector hood B501 adsorb and settle dust and particulate matter.

[0064] When air tightness testing is required after pipe bank welding, pipe bank 16 is placed on the other sleeve A24. The overall testing process is the same as the initial testing of pipe bank. The difference is that the initial testing of pipe bank is a local air tightness test of a portion of pipe bank 16, while the pipe bank welding test is an air tightness test of the entire pipe bank 16 at the same time as the air tightness test of the welding position of pipe bank 16.

[0065] Press the stop button on control panel 1 to cut off the power to the device, stop all parts from working, and the staff can remove pipe row 16.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0067] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A reheater tube bank maintenance device with a supporting structure, characterized in that: The system includes an upper housing (13), an outer housing (14) mounted on the lower side of the upper housing (13), a pipe row adaptive mechanism mirror-mounted on both sides of the outer housing (14), a pipe row (16) disposed in the middle of the pipe row adaptive mechanism, an intermediate housing A (19) mounted inside the outer housing (14), another set of pipe row adaptive mechanisms mirror-mounted on both sides of the intermediate housing A (19), a grinding mechanism mounted at both ends on one side of the intermediate housing A (19), an airtightness detection mechanism mounted on one side of the grinding mechanism, and the intermediate housing A (19) A left partition (192) is installed on one side below the intermediate housing A (19). Two dust removal mechanisms are installed on the outside of the intermediate housing A (19). An intermediate housing B (191) is installed in the middle of the intermediate housing A (19). An automatic welding mechanism is installed on one side of the intermediate housing B (191). Another air tightness detection mechanism is installed on the other side of the intermediate housing B (191). A bottom partition (2) is installed below the intermediate housing A (19). A drive mechanism is installed below the bottom partition (2). A lower housing (15) is installed below the drive mechanism. The pipe row adaptive mechanism includes a fixed frame A (21), a movable frame A (22), and a movable frame C (23). The fixed frame A (21) is mounted on the outer casing (14). A direction control motor B (251) is mounted on one side of the fixed frame A (21). A rotating shaft A (26) is mounted on the other side of the inner wall of the fixed frame A (21). A movable frame A (22) is mounted on one side of the rotating shaft A (26). A direction control motor A (25) is mounted on one side of the movable frame A (22). A rotating shaft B (261) is mounted on the other side of the inner wall of the movable frame A (22). A sleeve A (24) is installed on one side. Multiple first rotating grooves are provided on the inner wall of the sleeve A (24). A connecting rod A (281) is rotatably connected in the first rotating groove. A connecting rod B (282) is rotatably connected at one end of the connecting rod A (281). A roller (28) is rotatably connected at one end of the connecting rod B (282). A telescopic belt (27) is installed on the outside of the roller (28). A first tension spring (271) is installed at both ends of the telescopic belt (27). A second torsion spring is provided at the rotatable connection between the connecting rod A (281) and the connecting rod B (282). The roller (28) has an internal electric roller structure.

2. The reheater tube bank maintenance device with a supporting structure according to claim 1, characterized in that: The drive mechanism includes a drive motor (12), a synchronous belt (7), a drive gear (71), and a transmission gear A (72). The drive motor (12) is mounted on the upper housing (13), and the drive gear (71) is mounted on the output shaft of the drive motor (12). The drive gear (71) is mounted at the four corners of the upper side of the lower housing (15). The synchronous belt (7) meshes with the outer side of the drive gear (71). The transmission gear A (72) and the transmission gear B (721) mesh simultaneously on the synchronous belt (7). The transmission gear C (73) and the transmission gear D (731) mesh on one side of the transmission gear A (72) and the transmission gear B (721), respectively. The transmission gear C (73) and the transmission gear D (731) mesh with the transmission gear D (731) on the same side. The moving gear D (731) is equipped with a first guide post (86) and a second guide post. The first guide post (86) is axially mounted with a first bearing and a ratchet disk A (89). A cam A (82) is mounted on the outside of the first bearing. A first bearing hole is provided on the upper side of the middle part of the cam A (82). A ratchet tooth structure is provided on the lower side of the middle part of the cam A (82). A first boss is provided on the lower side of the ratchet disk A (89). A first torsion spring is mounted on the first boss. A ratchet A (87) is rotatably connected to the first boss through the first torsion spring. An electromagnet A (88) is mounted on one side of the ratchet A (87). The electromagnet A (88) is mounted on the lower side of the ratchet disk A (89).

3. A reheater tube bank maintenance device with a supporting structure according to claim 2, characterized in that: The grinding mechanism includes an adjusting motor (51), a drive wheel (52), and a rotating plate A (6). The adjusting motor (51) is mounted on the intermediate housing A (19). The drive wheel (52) is mounted on the output shaft of the adjusting motor (51). The drive wheel (52) is mounted on one side of the intermediate housing A (19). Driven wheels A (53) and B (54) are respectively meshed on both sides of the drive wheel (52). A grooved wheel A (531) is concentrically mounted on the driven wheel A (53), and a grooved wheel B (541) is concentrically mounted on the driven wheel B (54). A transmission belt B (551) is mounted on the outer side of the grooved wheel A (531). 51) An auxiliary wheel (56) is installed on the inner side. A rotating plate A (6) is installed on the outer side of the transmission belt B (551). The rotating plate A (6) is suspended on the intermediate housing A (19) through the auxiliary wheel (56). A transmission belt A (55) is installed on the outer side of the grooved wheel B (541). An auxiliary wheel (56) is installed on the inner side of the transmission belt A (55). Multiple auxiliary wheels (56) are installed at equal intervals along the center line of the fixed frame A (21). The auxiliary wheels (56) are installed on the intermediate housing A (19). A rotating plate B (61) is installed on the outer side of the transmission belt A (55). A grinding disc is provided on one side of the rotating plate A (6) and the rotating plate B (61).

4. A reheater tube bank maintenance device with a supporting structure according to claim 3, characterized in that: The dust removal mechanism includes a dust hood A (5), a dust hood B (501), a cam B (821), and an air storage bag (811). A left side partition (192) is installed on the lower side of one side of the intermediate housing A (19). A protective cover (8) is installed on the lower middle part of the left side partition (192). Cams A (82) and B (821) are installed on the lower sides of the left side partition (192) respectively. A telescopic frame A (83) is installed on one side of the cam A (82). The telescopic frame A (83) is slidably installed on one side of the protective cover (8). A return spring A (84) is provided on the telescopic frame A (83). One end of the return spring A (84) is installed on one side of the protective cover (8). A telescopic frame B (831) is installed on one side of the cam B (821). A return spring B (841) is provided on the telescopic frame B (831). An air storage bag (811) is installed on one side of the telescopic frame B (831). An air inlet pipe (85) and an air outlet pipe (853) are provided on the air storage bag (811). The air inlet pipe (85) is connected to the dust removal hood A (5) and the dust removal hood B (501). The airtightness testing mechanism includes an airtight isolation cover (4), a sliding plate (41), a sliding shaft (42), and a water bag (81). An airtight isolation cover (4) is installed on the intermediate housing A (19). Sliding shafts (42) are installed on both sides inside the airtight isolation cover (4). A sliding plate (41) is slidably installed on the sliding shafts (42). A water bag (81) is installed on one side of the telescopic frame A (83). A water outlet pipe (851) and a water injection pipe (852) are provided on the water bag (81). A water inlet (43) and a water outlet (44) are provided on one side of the airtight isolation cover (4). The water inlet (43) is connected to the water outlet pipe (851), and the water outlet (44) is connected to the water injection pipe (852). A flow meter is provided inside the water inlet (43) and the water outlet (44). The automatic welding mechanism includes a drive shaft (31), an automatic welding gun, and a welding isolation cover (3). An intermediate housing B (191) is installed in the middle of the intermediate housing A (19). A drive shaft (31) is installed on one side of the intermediate housing B (191). A driven wheel C (57) is installed on one side of the drive shaft (31). The driven wheel C (57) meshes with the driven wheel B (54). An automatic welding gun is installed in the middle of the drive shaft (31).

5. A reheater tube bank maintenance device with a supporting structure according to claim 4, characterized in that: The second guide post axial mounting structure is the same as the first guide post (86) axial mounting structure, except that: the pawl A (87) and pawl B (871) are mirror images, and the ratchet tooth structure on the lower side of the cam A (82) and cam B (821) is mirror images.

6. A reheater tube bank maintenance device with a supporting structure according to claim 5, characterized in that: A corrugated pipe is installed on the sleeve A (24).

7. A reheater tube bank maintenance device with a supporting structure according to claim 6, characterized in that: The upper housing (13) is equipped with a control panel (1), which contains a control system. The control panel (1) is equipped with a start button, a stop button, an emergency stop button, a dust removal button, and a buzzer. The upper housing (13) is equipped with an observation port A (11) and an observation port B (18), which are made of transparent acrylic material. The upper housing (13) is equipped with a water inlet (17), which is connected to a water inlet pipe (852) through a pipe.

Images