Polishing structure device for water cooling wall of boiler

Abstract

The utility model relates to the technical field of water cooling wall polishing, and discloses a boiler water cooling wall polishing structure device which comprises a supporting frame, a movable frame is arranged at the position, close to the middle, of the top of the supporting frame, an n-shaped plate is arranged on the other side of the movable frame, a polishing roller is arranged in an inner cavity of the n-shaped plate, and inserting grooves are formed in the front side and the rear side of the polishing roller. And T-shaped blocks are movably inserted into inner cavities of the inserting grooves correspondingly, driving shafts are fixedly installed on the sides, away from each other, of the T-shaped blocks correspondingly, when the grinding roller needs to be disassembled, under matched use of an adjusting assembly, a rocking wheel can be rotated, and a threaded rod B can be rotated under transmission of a transmission rod, a driving bevel gear and a driven bevel gear; and a rectangular plate can move towards the far side through a threaded sleeve B which is in threaded connection to the periphery of a threaded rod B, so that a T-shaped block can be far away from an inner cavity of an adjacent inserting groove, the grinding roller is convenient to disassemble and replace, and the working intensity of workers is relieved.

Description

Technical Field

[0001] This utility model relates to the field of water-cooled wall grinding technology, specifically a grinding structure and device for boiler water-cooled walls. Background Technology

[0002] Water-cooled walls are the main heat-receiving part of a boiler. They consist of several rows of steel tubes distributed around the boiler furnace. Water-cooled walls absorb the heat generated by fuel combustion through metal tubes to heat the water vapor inside the steel tubes, thus achieving heat exchange. They are one of the most important heat-receiving surfaces of a boiler.

[0003] When removing impurities from the outer wall of a water-cooled wall, a grinding roller is used to grind the wall. However, the grinding roller is prone to wear during prolonged grinding, and existing devices do not allow for quick replacement of the grinding roller, which increases the difficulty of replacement.

[0004] Therefore, we propose a grinding structure device for boiler water-cooled walls to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a grinding structure device for boiler water-cooled walls to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a grinding structure device for boiler water-cooled walls, including a support frame, a movable frame is provided at the top of the support frame near the middle position, an n-shaped plate is provided on the other side of the movable frame, a grinding roller is provided in the inner cavity of the n-shaped plate, slots are provided on both the front and rear sides of the grinding roller, and T-shaped blocks are movably inserted into the inner cavity of each slot, a drive shaft is fixedly installed on the side of the T-shaped block that is far away from each other, and the far end of the drive shaft movably passes through the inner cavity of the n-shaped plate, a load-bearing plate is fixedly installed on the rear side of the n-shaped plate near the bottom, a grinding motor is fixedly installed on the bottom of the load-bearing plate, the power output shaft of the grinding motor is fixedly connected to the adjacent drive shaft, an adjustment component is provided on the top of the grinding roller, several clamping plates are provided on the top of the support frame near both sides, and a dust collection component is provided on the bottom of the support frame;

[0007] The adjustment assembly includes a rocker wheel located at the top center of the n-shaped plate and a transmission rod fixedly installed at the bottom center of the rocker wheel. The bottom end of the transmission rod passes through the top of the inner cavity of the n-shaped plate and is fixedly installed with a driving bevel gear. A driven bevel gear meshes with the rear side of the driving bevel gear. A threaded rod B is provided through the front center of the driven bevel gear. The front and rear ends of the threaded rod B are rotatably connected to the front and rear sides of the inner cavity of the n-shaped plate, respectively. Threaded sleeves B are threadedly connected to the outer periphery of the threaded rod B near the front and rear ends, and rectangular plates are fixedly installed at the bottom of each threaded sleeve B. The rectangular plates are movably sleeved on the outer periphery of the adjacent drive shafts.

[0008] Preferably, a limiting block is fixedly installed on the top of each threaded sleeve B, and a T-shaped limiting rod is movably inserted through the opposite side of each limiting block, with the opposite ends of the T-shaped limiting rods respectively fixedly connected to the inner cavity sidewall of the n-shaped plate.

[0009] Preferably, a T-shaped insert rod is movably inserted through the top of the rocker wheel near the other side, and several limiting holes are opened on the top of the n-shaped plate. The bottom end of the T-shaped insert rod is inserted into the inner cavity of the limiting hole. A spring is movably sleeved on the outer periphery of the T-shaped insert rod near the top end, and the top end of the spring is fixedly connected to the T-shaped insert rod, and the bottom end of the spring is fixedly connected to the rocker wheel.

[0010] Preferably, an electric slide rail A is fixedly installed on the top of the support frame near both the front and rear sides, an electric slider A is slidably connected to the top of the electric slide rail A, the top of the electric slider A is fixedly connected to the movable frame, and a controller is fixedly installed on the front side of the support frame near the other side.

[0011] Preferably, a mounting frame is fixedly installed at the top center of the movable frame, and electric slide rails B are fixedly installed on the other side of the mounting frame near the front and rear sides. Electric sliders B are slidably connected to the other side of the electric slide rails B, and a movable plate is fixedly installed on the other side of the electric sliders B. The movable plate is fixedly connected to the n-shaped plate.

[0012] Preferably, a support plate is fixedly installed on the other side of the support frame near the middle position. A servo motor is fixedly installed on the bottom of the support plate. A threaded rod A is fixedly installed on the end of the power output shaft of the servo motor. The end of the power output shaft of the threaded rod A movably passes through the inner cavity sidewall of the support frame and is rotatably connected to the sidewall away from the support frame. A threaded sleeve A is threadedly connected to the outer circumference of the threaded rod A. Several clamping plates are fixedly installed on adjacent threaded sleeves A respectively. A connecting block is fixedly installed on the bottom of the threaded sleeve A near both the front and rear ends. A connecting rod movably passes through one side of each connecting block, and the two ends of the connecting rod are fixedly connected to the inner cavity sidewall of the support frame respectively.

[0013] Preferably, the dust collection assembly includes a dust collection hood fixedly installed at the bottom of the support frame and a filter screen installed near the middle position inside the dust collection hood, and a negative pressure fan is installed at the bottom of the dust collection hood.

[0014] Preferably, rectangular openings are provided on both sides of the dust cover near the middle position, and sealing plugs are movably inserted into the inner cavity of each rectangular opening.

[0015] Preferably, a number of connecting columns are fixedly installed on the opposite sides of the T-shaped blocks, and irregular blocks are fixedly installed at the ends of the connecting columns. Irregular grooves are opened on the opposite sides of the rectangular plates, and the irregular blocks are slidably connected in the inner cavities of adjacent irregular grooves.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. When the grinding roller needs to be disassembled, the adjusting component can rotate the rocker wheel. Under the transmission of the transmission rod, the driving bevel gear and the driven bevel gear, the threaded rod B can be rotated. The threaded sleeve B, which is threaded to the outer circumference of the threaded rod B, can move the rectangular plate to the side away from each other, thereby moving the T-shaped block away from the inner cavity of the adjacent slot, which facilitates the disassembly and replacement of the grinding roller and reduces the workload of the workers.

[0018] 2. When dealing with grinding debris, the dust collection component can be used in conjunction with the negative pressure fan to adsorb the debris generated during the grinding of the water-cooled wall onto the top of the filter screen, making it easy to collect the debris. The rectangular opening and sealing plug facilitate the handling of the collected debris. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0020] Figure 2 This is a cross-sectional three-dimensional view of the dust suction head and filter screen of this utility model;

[0021] Figure 3 This is a partial bottom-view three-dimensional structural diagram of the support frame of this utility model;

[0022] Figure 4 Exploded view of the movable frame, grinding roller and mounting frame of this utility model;

[0023] Figure 5 Exploded view of the movable frame, grinding motor and drive shaft of this utility model;

[0024] Figure 6 For the present utility model Figure 5 Enlarged view of point A in the middle;

[0025] Figure 7 For the present utility model Figure 5 Enlarged view of section B in the middle.

[0026] In the diagram: 1. Support frame; 11. Electric slide rail A; 12. Electric slider A; 13. Controller; 2. Moving frame; 21. Mounting frame; 22. Electric slide rail B; 23. Electric slider B; 24. Moving plate; 3. N-shaped plate; 4. Grinding roller; 5. Clamping plate; 51. Support plate; 52. Servo motor; 53. Threaded rod A; 54. Threaded sleeve A; 55. Connecting block; 56. Connecting rod; 6. Dust collection assembly; 61. Dust collection hood; 611. Rectangular opening; 612. Sealing plug; 62 63. Filter screen; 74. Negative pressure fan; 75. Adjustment component; 76. Rocker wheel; 77. T-shaped insert rod; 78. Limiting hole; 79. Spring; 70. Transmission rod; 71. Driving bevel gear; 72. Driven bevel gear; 73. Threaded rod B; 74. Threaded sleeve B; 75. Limiting block; 76. T-shaped limiting rod; 77. Rectangular plate; 8. Load-bearing plate; 9. Grinding motor; 10. Drive shaft; 21. T-shaped block; 22. Connecting column; 23. Irregularly shaped block; 24. Irregularly shaped groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figure 1-7 A grinding structure device for boiler water-cooled walls includes a support frame 1. A movable frame 2 is provided at the top of the support frame 1 near the middle position. An n-shaped plate 3 is provided on the other side of the movable frame 2. A grinding roller 4 is provided in the inner cavity of the n-shaped plate 3. Slots are provided on both the front and rear sides of the grinding roller 4, and T-shaped blocks 20 are movably inserted into the inner cavity of each slot. A drive shaft 10 is fixedly installed on the side of the T-shaped block 20 that is away from each other. The end of the drive shaft 10 that is away from each other movably passes through the inner cavity of the n-shaped plate 3. The rear side of the n-shaped plate 3 is near the... A load-bearing plate 8 is fixedly installed at the bottom, and a grinding motor 9 is fixedly installed at the bottom of the load-bearing plate 8. The power output shaft of the grinding motor 9 is fixedly connected to the adjacent drive shaft 10. (When the power output shaft of the grinding motor 9 rotates, the drive shaft 10 fixed on the grinding motor 9 can rotate, thereby enabling the grinding roller 4 to clean the impurities on the periphery of the water-cooled wall.) An adjustment component 7 is provided at the top of the grinding roller 4. Several clamping plates 5 are provided at the top of the support frame 1 near both sides. A dust collection component 6 is provided at the bottom of the support frame 1.

[0030] The adjustment assembly 7 includes a rocker wheel 71 located at the top center of the n-shaped plate 3 and a transmission rod 72 fixedly installed at the bottom center of the rocker wheel 71. The bottom end of the transmission rod 72 passes through the top of the inner cavity of the n-shaped plate 3 and is fixedly installed with a driving bevel gear 73. The rear side of the driving bevel gear 73 meshes with a driven bevel gear 74. A threaded rod B75 is provided through the front center of the driven bevel gear 74. (The front and rear ends of the outer periphery of the threaded rod B75 are provided with opposite external threads, and the thread precision is the same during manufacturing.) The front and rear ends of the threaded rod B75 are rotatably connected to the front and rear sides of the inner cavity of the n-shaped plate 3, respectively. Threaded sleeves B76 are threadedly connected to the outer periphery of the threaded rod B75 near the front and rear ends, and rectangular plates 77 are fixedly installed at the bottom of the threaded sleeves B76. (The rectangular plates 77 are provided with through holes, and the drive shafts 10 respectively move through the inner cavities of the through holes.) The rectangular plates 77 are respectively movably sleeved on the outer periphery of the adjacent drive shafts 10.

[0031] Specifically, when the grinding roller 4 needs to be disassembled, the rocker wheel 71 can be rotated with the help of the adjusting component 7. The threaded rod B75 can be rotated under the transmission of the transmission rod 72, the driving bevel gear 73 and the driven bevel gear 74. The threaded sleeve B76 connected to the outer circumference of the threaded rod B75 can move the rectangular plate 77 to the side away from each other, thereby moving the T-shaped block 20 away from the inner cavity of the adjacent slot, which facilitates the disassembly and replacement of the grinding roller 4 and reduces the workload of the workers.

[0032] Limiting blocks 761 are fixedly installed on the top of threaded sleeve B76. T-shaped limiting rods 762 are movably inserted through the opposite side of the limiting blocks 761, and the opposite ends of the T-shaped limiting rods 762 are fixedly connected to the inner cavity sidewall of the n-shaped plate 3.

[0033] Specifically, the T-shaped limit rod 762 and the limit block 761 can limit the movement of the threaded sleeve B76.

[0034] A T-shaped insert rod 711 is movably inserted through the top of the rocker wheel 71 near the other side. Several limiting holes 712 are opened on the top of the n-shaped plate 3 (the several limiting holes 712 are arranged in a circular array around the bottom center of the rocker wheel 71). The bottom end of the T-shaped insert rod 711 is inserted into the inner cavity of the limiting hole 712. A spring 713 is movably sleeved on the outer periphery of the T-shaped insert rod 711 near the top end. The top end of the spring 713 is fixedly connected to the T-shaped insert rod 711, and the bottom end of the spring 713 is fixedly connected to the rocker wheel 71.

[0035] Specifically, by setting the spring 713, the T-shaped insert 711 can be stably inserted into the inner cavity of the adjacent limiting hole 712, thereby limiting the rotation position of the rocker wheel 71.

[0036] Electric slide rails A11 are fixedly installed on the top of the support frame 1 near the front and rear sides. Electric sliders A12 are slidably connected to the top of the electric slide rails A11. The top of the electric sliders A12 are fixedly connected to the movable frame 2. A controller 13 is fixedly installed on the front side of the support frame 1 near the other side.

[0037] Specifically, the moving frame 2 can be reciprocated by setting up electric slide rail A11 and electric slider A12.

[0038] A mounting bracket 21 is fixedly installed at the top center of the movable frame 2. Electric slide rails B22 are fixedly installed on the other side of the mounting bracket 21 near the front and rear sides. Electric sliders B23 are slidably connected to the other side of the electric slide rails B22. A movable plate 24 is fixedly installed on the other side of the electric sliders B23, and the movable plate 24 is fixedly connected to the n-shaped plate 3.

[0039] Specifically, by setting the electric slide rail B22 and the electric slider B23, the height of the n-shaped plate 3 can be adjusted, which in turn facilitates the adjustment of the height of the grinding roller 4.

[0040] A support plate 51 is fixedly installed on the other side of the support frame 1 near the middle position. A servo motor 52 is fixedly installed on the bottom of the support plate 51. A threaded rod A53 is fixedly installed on the end of the power output shaft of the servo motor 52. (The outer periphery of the threaded rod A53 has opposite external threads near both ends, and the external threads have the same precision.) The end of the power output shaft of the threaded rod A53 moves through the inner cavity sidewall of the support frame 1 and is rotatably connected to the sidewall away from the support frame 1. A threaded sleeve A54 is threadedly connected to the outer periphery of the threaded rod A53. Several clamping plates 5 are fixedly installed on adjacent threaded sleeves A54. A connecting block 55 is fixedly installed on the bottom of the threaded sleeve A54 near both the front and rear ends. A connecting rod 56 moves through one side of each connecting block 55, and the two ends of the connecting rod 56 are fixedly connected to the inner cavity sidewall of the support frame 1.

[0041] Specifically, when the power output shaft of the servo motor 52 rotates, the threaded rod A53 fixed to the end of the power output shaft of the servo motor 52 can rotate, thereby enabling the two threaded sleeves A54 threadedly connected to the threaded rod A53 to move to opposite sides under the limit of the connecting block 55 and the connecting rod 56, thereby fixing the water-cooled wall and facilitating subsequent grinding of the water-cooled wall.

[0042] Several connecting posts 201 are fixedly installed on the opposite side of the T-shaped block 20. The ends of the connecting posts 201 are fixedly installed with irregular blocks 202. Irregular grooves 203 are opened on the opposite side of the rectangular plate 77. The irregular blocks 202 are slidably connected in the inner cavity of the adjacent irregular grooves 203.

[0043] Example 2

[0044] This embodiment is an improvement upon embodiment 1. For details, please refer to [link / reference]. Figure 2 The dust collection assembly 6 includes a dust collection hood 61 fixedly installed at the bottom of the support frame 1 and a filter 62 installed in the inner cavity of the dust collection hood 61 near the middle position. A negative pressure fan 63 is installed at the bottom of the dust collection hood 61.

[0045] Specifically, when dealing with grinding debris, the dust collection component 6, when the negative pressure fan 63 rotates, can adsorb the debris generated from grinding the water-cooled wall onto the top of the filter screen 62, making it convenient to collect the debris.

[0046] The dust cover 61 has rectangular openings 611 on both sides near the middle, and the inner cavity of each rectangular opening 611 is movably connected with a sealing plug 612.

[0047] Specifically, the rectangular opening 611 and the sealing plug 612 facilitate the processing of the collected debris.

[0048] Working Principle: In use, the water-cooled wall is placed on top of the support frame 1. Then, the servo motor 52 is started by the controller 13. The rotation of the power output shaft of the servo motor 52 drives the threaded rod A53 fixed to the end of the power output shaft of the servo motor 52 to rotate. The outer periphery of the threaded rod A53 has opposite external threads near both ends. The threaded sleeve A54, which is threadedly connected to the threaded rod A53, can move several clamping plates 5 to opposite sides under the limitation of the connecting block 55 and the connecting rod 56, thereby limiting the water-cooled wall. Then, the grinding roller 4 grinds the water-cooled wall to clean the impurities on its outer periphery. When it is necessary to disassemble the grinding roller 4, the T-shaped insert 711 can be pulled upward to move the bottom end of the T-shaped insert 711 away from the inner cavity of the adjacent limiting hole 712. Then, the rocker wheel 71 can be rotated to rotate the transmission rod 72 fixed at the bottom of the rocker wheel 71. The active bevel gear 73 fixed at the bottom end of the transmission rod 72 rotates. The driven bevel gear 74, which meshes with the active bevel gear 73, can rotate, thereby causing the threaded rod B75 to rotate. The outer periphery of the threaded rod B75 has opposite external threads near both ends. The threaded sleeve B76, which is threadedly connected to the outer periphery of the threaded rod B75, can move to the opposite side under the limitation of the limiting block 761 and the T-shaped limiting rod 762, thereby causing the adjacent rectangular plate 77 to move to the opposite side. Under the connection of the connecting column 201, the adjacent T-shaped block 20 can move to the opposite side, allowing the T-shaped block 20 to move away from the inner cavity of the adjacent slot, facilitating the disassembly and replacement of the grinding roller 4. During the grinding process, the negative pressure fan 63 can be started to rotate by the controller 13, thereby sucking the impurities generated during grinding into the inner cavity of the dust collection hood 61 and isolating them on the top of the filter screen 62. When it is necessary to clean the impurities on the top of the filter screen 62, the sealing plug 612 can be removed from the inner cavity of the rectangular opening 611 to clean the impurities.

[0049] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0050] 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 boiler water wall polishing structure device, comprising a support frame (1), characterized in that: The top of the support frame (1) is provided with a moving frame (2) near the middle position, the other side of the moving frame (2) is provided with an n-shaped plate (3), the inner cavity of the n-shaped plate (3) is provided with a polishing roller (4), the front and rear sides of the polishing roller (4) are both provided with a slot, the inner cavities of the slots are both movably connected with a T-shaped block (20), the sides away from each other of the T-shaped block (20) are both fixedly connected with a driving shaft (10), the ends away from each other of the driving shaft (10) are respectively movably penetrated through the inner cavity of the n-shaped plate (3), the rear side of the n-shaped plate (3) is fixedly connected with a bearing plate (8) near the bottom, the bottom of the bearing plate (8) is fixedly connected with a polishing motor (9), the power output shaft of the polishing motor (9) is fixedly connected with the adjacent driving shaft (10), the top of the polishing roller (4) is provided with an adjusting assembly (7), the top of the support frame (1) is provided with a plurality of clamping plates (5) near the two sides, and the bottom of the support frame (1) is provided with a dust collection assembly (6). The adjusting assembly (7) comprises a rocking wheel (71) located at the top of the n-shaped plate (3) and a transmission rod (72) fixedly connected at the bottom center of the rocking wheel (71), the bottom end of the transmission rod (72) penetrates through the top of the inner cavity of the n-shaped plate (3) and is fixedly connected with a driving bevel gear (73), the rear side of the driving bevel gear (73) is engaged with a driven bevel gear (74), the front side center of the driven bevel gear (74) is provided with a threaded rod B (75), the front and rear ends of the threaded rod B (75) are respectively rotatably connected with the inner cavities of the front and rear sides of the n-shaped plate (3), the outer periphery of the threaded rod B (75) is threadedly connected with a threaded sleeve B (76) near the front and rear ends, and the bottom of the threaded sleeve B (76) is fixedly connected with a rectangular plate (77), and the rectangular plate (77) is movably sleeved on the outer periphery of the adjacent driving shaft (10).

2. A structure device for polishing the water-cooled wall of a boiler according to claim 1, characterized in that: The top of the threaded sleeve B (76) is fixedly connected with a limiting block (761), the opposite side of the limiting block (761) is movably penetrated through a T-shaped limiting rod (762), and the ends away from each other of the T-shaped limiting rod (762) are respectively fixedly connected with the inner cavity side walls of the n-shaped plate (3).

3. The structure of a boiler water wall polishing device according to claim 1, characterized in that: The top of the rocking wheel (71) is movably penetrated through a T-shaped insertion rod (711) near the other side, the top of the n-shaped plate (3) is provided with a plurality of limiting holes (712), and the bottom end of the T-shaped insertion rod (711) is inserted into the inner cavity of the limiting hole (712), the outer periphery of the T-shaped insertion rod (711) is movably sleeved with a spring (713) near the top end, the top end of the spring (713) is fixedly connected with the T-shaped insertion rod (711), and the bottom end of the spring (713) is fixedly connected with the rocking wheel (71).

4. The structure of a boiler water wall polishing device according to claim 1, characterized in that: The top of the support frame (1) is fixedly connected with an electric sliding rail A (11) near the front and rear sides, the top of the electric sliding rail A (11) is slidably connected with an electric sliding block A (12), the top of the electric sliding block A (12) is fixedly connected with the moving frame (2), and the front side of the support frame (1) is fixedly connected with a controller (13) near the other side.

5. The structure of a boiler water wall polishing device according to claim 1, characterized in that: The top middle position of the moving frame (2) is fixedly installed with a mounting frame (21), the other side of the mounting frame (21) is fixedly installed with an electric sliding rail B (22) near the front and rear sides, the other side of the electric sliding rail B (22) is slidably connected with an electric sliding block B (23), the other side of the electric sliding block B (23) is fixedly installed with a moving plate (24) in common, and the moving plate (24) is fixedly connected with the n-shaped plate (3).

6. The structure of a boiler water wall polishing device according to claim 1, characterized in that: The other side of the support frame (1) is fixedly installed with a support plate (51) near the middle position, the bottom of the support plate (51) is fixedly installed with a servo motor (52), the power output shaft of the servo motor (52) is fixedly installed with a threaded rod A (53) at the shaft end, the power output shaft of the threaded rod A (53) is movably penetrated through the inner cavity side wall of the support frame (1) and is rotatably connected to the side wall away from the support frame (1), the outer periphery of the threaded rod A (53) is threadedly connected with a threaded sleeve A (54), a plurality of clamping plates (5) are fixedly installed on adjacent threaded sleeves A (54), the bottom of the threaded sleeve A (54) is fixedly installed with a connecting block (55) near the front and rear ends, the connecting block (55) is movably penetrated through a connecting rod (56) on one side, and the two ends of the connecting rod (56) are fixedly connected with the inner cavity side wall of the support frame (1).

7. The structure of a boiler water wall polishing device according to claim 1, characterized in that: The dust suction assembly (6) comprises a dust suction cover (61) fixedly installed at the bottom of the support frame (1) and a filter screen (62) installed at the inner cavity of the dust suction cover (61) near the middle position, and the bottom of the dust suction cover (61) is installed with a negative pressure fan (63).

8. A structure for polishing the water-cooled wall of a boiler according to claim 7, characterized in that: The both sides of the dust suction cover (61) are provided with rectangular openings (611) near the middle position, and the inner cavities of the rectangular openings (611) are movably inserted with sealing plugs (612).

9. The structure of a boiler water wall polishing device according to claim 1, characterized in that: The sides away from each other of the T-shaped block (20) are fixedly installed with a plurality of connecting columns (201), the ends of the connecting columns (201) are fixedly installed with special-shaped blocks (202), and the opposite sides of the rectangular plates (77) are provided with special-shaped grooves (203), and the special-shaped blocks (202) are slidably connected in the inner cavities of adjacent special-shaped grooves (203).

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