A boiler water wall tube impurity removing device

Abstract

The application discloses a boiler water-cooled wall pipe impurity removing device and belongs to the technical field of boiler maintenance equipment, which comprises a connecting seat, a plurality of arc-shaped plates, an impurity removing mechanism and a transmission mechanism. The arc-shaped plates are arranged on the inner side wall of the connecting seat and coaxially correspond to the water-cooled wall pipe. The impurity removing mechanism is arranged on the side, away from the connecting seat, of the arc-shaped plate and is provided with at least two. The impurity removing mechanism is used for polishing the outer wall of the water-cooled wall pipe. The transmission mechanism is arranged in the connecting seat. A plurality of abutting mechanisms are arranged on the inner wall of the connecting seat. The transmission mechanism and the arc-shaped plate are used for driving the plurality of impurity removing mechanisms to complete the polishing work of the outer wall of the water-cooled wall pipe, thereby replacing the traditional manual operation mode, effectively reducing the field operation intensity, greatly improving the pretreatment efficiency and good in polishing uniformity. The plurality of abutting mechanisms are arranged in a matched mode, the radial distance between the connecting seat and the pipe wall can be accurately adjusted, the polishing roller can maintain a reasonable contact pressure, and the impurity removing work quality is stable and controllable.

Description

Technical Field

[0001] This invention relates to the field of boiler maintenance equipment technology, and more specifically, to a device for removing impurities from boiler water-cooled wall tubes. Background Technology

[0002] During the operation of a coal-fired boiler, flue gas carrying fly ash and hard coal ash particles continuously washes against the outer wall of the water-cooled wall tubes, causing oxide scale, rust, ash, and other impurities to adhere to the tube surface. Before carrying out water-cooled wall anti-wear protection operations such as thermal spraying and laser cladding, and after a period of use, it is necessary to pre-treat the semi-circular surface of the outer side of the water-cooled wall tubes to remove rust and impurities from the tube surface. Furthermore, the cleanliness and roughness of the water-cooled wall tube surface directly determine the effectiveness of thermal spraying and laser cladding.

[0003] Currently, most water-cooled wall tube cleaning operations rely on manual hand-held grinding tools to process each tube individually. This results in limited working space, difficulty in maintaining uniform and thorough grinding, and low processing efficiency. In addition, some specialized cleaning equipment has poor adaptability and cannot be adjusted appropriately for the contact distance with the outer wall of the water-cooled wall tube. This can easily lead to over-grinding or incomplete cleaning during the grinding and cleaning process, resulting in poor actual operating results.

[0004] Therefore, it is necessary to provide a device for removing impurities from boiler water-cooled wall tubes to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a device for removing impurities from boiler water-cooled wall tubes to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A device for removing impurities from boiler water-cooled wall tubes includes: A plurality of connectors are provided, and adjacent connectors are detachably connected. An arc-shaped plate is disposed on the inner side wall of the connecting seat and is coaxially corresponding to the water-cooled wall tube; A cleaning mechanism is provided on the side of the arc-shaped plate away from the connecting seat, and at least two such mechanisms are provided, for grinding and cleaning the outer wall of the water-cooled wall tube. A transmission mechanism, located within the connecting seat, is used to drive the arc-shaped plate to reciprocate along the outer wall of the water-cooled wall tube. Multiple sets of abutment mechanisms are provided on the inner wall of the connecting seat for abutting against the outer wall of the water-cooled wall tube and for adjusting the distance between the connecting seat and the water-cooled wall tube.

[0007] Furthermore, the impurity removal mechanism includes: Two support plates are set on the inner side wall of the arc-shaped plate. A rotating shaft is rotatably connected to each of the two support plates, and a grinding roller is detachably connected between the two rotating shafts. A first driving component is mounted on one of the support plates, and the output end of the first driving component is connected to the rotating shaft via a transmission.

[0008] Furthermore, the connecting seat has a transmission cavity inside, and the inner side wall of the connecting seat has an arc-shaped groove communicating with the transmission cavity. A connecting plate is slidably connected to the inner wall of the arc-shaped groove, and the outer end of the connecting plate is connected to the arc-shaped plate.

[0009] Furthermore, the transmission mechanism includes: A second driving member is disposed within the transmission cavity, and a gear is provided at the output end of the second driving member; A lower arc plate is provided on the outer wall of the connecting plate, and the lower arc plate is provided with an arc-shaped toothed plate that meshes with the gear.

[0010] Furthermore, the outer end of the connecting plate is connected to a sleeve plate, the sleeve plate has an inner groove, the inner groove is slidably connected to an inner connecting plate connected to the arc-shaped plate, and an elastic element is provided between the inner connecting plate and the inner wall of the inner groove.

[0011] Furthermore, a rotating rod is rotatably mounted on the inner plate, and a transition plate connected to the outer wall of the arc-shaped plate is provided on the rotating rod. A fastening bolt for abutting the rotating rod is threadedly connected to the outer wall of the inner plate.

[0012] Furthermore, the contact mechanism includes: The mounting bracket is connected to the inner wall of the connecting seat via an adjustment component, the adjustment component being used to adjust the distance between the mounting bracket and the connecting seat; The abutment roller is rotatably connected to the mounting frame and is used to abut against the water-cooled wall tube.

[0013] Furthermore, the adjustment component includes: A stud is provided on the inner side wall of the connecting seat, and an adjusting cylinder that is rotatably connected to the mounting bracket is externally threaded onto the stud. A side frame is provided on the outer wall of the stud, and a limiting rod that slides through the side frame is provided on the mounting bracket.

[0014] Furthermore, at least one connecting rod is provided on one outer wall of the connecting seat, and a socket rod adapted to be inserted into the connecting rod is provided on the other side of the connecting seat. The socket rod and the connecting rod are detachably connected.

[0015] Furthermore, the connecting rod has multiple fixing holes through it, and the sleeve rod has connecting holes that are adapted to the fixing holes.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention drives an arc-shaped plate to reciprocate along the outer wall of the water-cooled wall tube via a transmission mechanism, thereby driving multiple sets of impurity removal mechanisms to complete the grinding operation of the outer wall of the water-cooled wall tube. This replaces the traditional manual grinding operation mode of using hand tools, effectively reducing the labor intensity of on-site operations, significantly improving the efficiency of tube wall pretreatment, and achieving a grinding uniformity far superior to manual operation. This ensures the cleanliness and roughness of the tube wall surface, meeting the construction requirements of subsequent anti-wear processes such as thermal spraying and laser cladding.

[0017] 2. The present invention is equipped with multiple sets of abutment mechanisms, which can accurately adjust the radial distance between the connecting seat and the pipe wall, so that the grinding roller maintains a reasonable contact pressure. This can avoid excessive pressure causing excessive grinding damage to the pipe wall substrate, and also prevent the problem of incomplete grinding and cleaning due to excessive contact gap. The device has strong adaptability and the quality of impurity removal operation is stable and controllable. In addition, the rolling support of the abutment roller on the outer wall of the water-cooled wall tube provides reliable positioning support for the whole device and allows the device to move smoothly along the axial direction of the pipe, realizing continuous long-distance impurity removal operation of a single water-cooled wall tube.

[0018] 3. The present invention uses an elastic floating compensation structure between the arc plate and the connecting plate to adapt to local deformation of the water-cooled wall tube, dimensional deviation and wear of the grinding roller, automatically compensate for displacement and maintain effective contact between the grinding component and the tube wall.

[0019] 4. This invention adopts a modular splicing structure with multi-segment connecting seats, and achieves quick assembly and disassembly with the help of connecting rods and sleeve rods. The overall specifications of the device can be flexibly adjusted according to the water-cooled wall tube layout and actual site requirements, and it is suitable for various working conditions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the impurity removal device of the present invention in use. Figure 2 This is a top view of the impurity removal device of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a structural schematic diagram of the inner side view of two adjacent impurity removal devices of the present invention; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 for Figure 4 Enlarged view of point C in the middle; Figure 7 This is a schematic diagram of the structure of the impurity removal device of the present invention, showing the arc plate rotating to one extreme state. Figure 8 for Figure 7 Enlarged view of point D; Figure 9 This is a cross-sectional structural diagram of the sleeve plate of the present invention; Figure 10 This is a partial cross-sectional view of the connector of the present invention; Figure 11 This is a top view of the cross-sectional structure of the connector of the present invention.

[0021] Explanation of the labels in the diagram: 1. Connecting seat; 2. Arc plate; 3. Impurity removal mechanism; 31. Support plate; 32. Grinding roller; 33. First driving component; 4. Transmission mechanism; 41. Second driving component; 42. Gear; 43. Lower arc plate; 44. Arc toothed plate; 5. Abutment mechanism; 51. Mounting frame; 52. Adjustment assembly; 521. Stud; 522. Adjustment cylinder; 523. Side frame; 524. Limiting rod; 53. Abutment roller; 6. Transmission cavity; 7. Arc groove; 8. Connecting plate; 9. Sleeve plate; 10. Inner groove; 11. Inner connecting plate; 12. Elastic component; 13. Rotating rod; 14. Adapter plate; 15. Fastening bolt; 16. Connecting rod; 17. Sleeve rod; 18. Fixing hole; 19. Connecting hole; 20. Cleaning brush. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-11 A device for removing impurities from boiler water-cooled wall tubes, comprising: Connecting seat 1, multiple of which are detachably connected to each other, can be flexibly spliced ​​and combined according to the number and spacing of water-cooled wall tubes, and is suitable for various specifications of boiler water-cooled walls; Arc-shaped plate 2 is disposed on the inner side wall of connecting seat 1 and is coaxially corresponding to the water-cooled wall tube; The impurity removal mechanism 3 is located on the side of the arc plate 2 away from the connecting seat 1 and there are at least two of them. It is used to grind and remove impurities from the outer wall of the water-cooled wall tube. The transmission mechanism 4 is located in the connecting seat 1 and is used to drive the arc plate 2 to reciprocate along the outer wall of the water-cooled wall tube to achieve circumferential impurity removal on the outer side of the outer wall of the water-cooled wall tube. Multiple sets of abutment mechanisms 5 are provided on the inner wall of the connecting seat 1, used to abut against the outer wall of the water-cooled wall tube and to adjust the distance between the connecting seat 1 and the water-cooled wall tube.

[0024] In use, first, select the corresponding number of connecting seats 1 according to the specifications of the water-cooled wall tube to be cleaned and assemble them into a whole; adjust each set of abutment mechanisms 5 so that the abutment mechanisms 5 fit against the outer wall of the water-cooled wall tube, and at the same time adjust the distance between the connecting seat 1 and the tube wall to maintain a suitable contact pressure between the impurity removal mechanism 3 and the tube wall, that is, adjust the impurity removal effect of the subsequent impurity removal mechanism 3; start the impurity removal mechanism 3 to grind the tube wall, and at the same time drive the arc plate 2 to reciprocate along the circumference of the tube wall through the transmission mechanism 4, so that the impurity removal mechanism 3 can perform a comprehensive impurity removal operation on the outer semi-circular arc outer wall of the water-cooled wall tube; during the operation, the device can be pushed along the axial direction of the water-cooled wall tube to achieve continuous cleaning of the entire water-cooled wall tube. The connecting seat 1 can be raised and lowered manually, or the connecting seat 1 can be moved axially by external hoisting equipment or lifting equipment.

[0025] The transmission mechanism 4 drives the arc-shaped plate 2 to reciprocate along the outer wall of the water-cooled wall tube, thereby driving multiple sets of impurity removal mechanisms 3 to complete the grinding operation on the outer wall of the water-cooled wall tube. This replaces the traditional manual grinding operation mode of using hand tools, effectively reducing the labor intensity of on-site operations, significantly improving the efficiency of tube wall pretreatment, and achieving a grinding uniformity far superior to manual operation. This ensures the cleanliness and roughness of the tube wall surface, meeting the construction requirements of subsequent anti-wear processes such as thermal spraying and laser cladding. Furthermore, multiple sets of contact mechanisms 5 are provided to precisely adjust the radial distance between the connecting seat 1 and the tube wall, maintaining a reasonable contact pressure on the grinding roller 32. This avoids excessive pressure causing excessive grinding damage to the tube wall substrate, and also prevents incomplete grinding and cleaning due to excessive contact gaps. The device has strong adaptability, and the quality of impurity removal operations is stable and controllable.

[0026] Preferably, the impurity removal mechanism 3 includes: Two support plates 31 are set on the inner side wall of the arc plate 2. A rotating shaft is rotatably connected to each of the two support plates 31. A grinding roller 32 is detachably connected between the two rotating shafts for easy replacement after wear. The first drive unit 33 is installed on one of the support plates 31. The output end of the first drive unit 33 is connected to the rotating shaft. The first drive unit 33 can be a waterproof and dustproof geared motor to adapt to the dusty working environment on site.

[0027] Once the entire equipment is in place, the first drive unit 33 is activated, driving the rotating shaft to rotate the grinding roller 32 at high speed, thus grinding and removing impurities from the outer wall of the water-cooled wall tubes. When the grinding roller 32 wears out, the machine is stopped, the rotating shaft connection is disassembled, the old grinding roller 32 is removed, a new grinding roller 32 is replaced, and then the equipment is reassembled. There is no need to replace the entire impurity removal mechanism, reducing maintenance costs.

[0028] By setting at least two impurity removal mechanisms 3, which are located at both ends of the arc plate 2, impurities on the outer semi-circular outer wall of the water-cooled wall tube can be removed more thoroughly.

[0029] Preferably, the inner sidewall of the arc plate 2 is also provided with a cleaning brush 20. The cleaning brush 20 rotates synchronously with the arc plate 2, and can promptly clean the grinding debris and dust remaining on the pipe wall surface after the grinding roller 32 has ground it, further improving the cleanliness of the pipe wall, eliminating the need for a separate subsequent cleaning process and saving operation time.

[0030] Preferably, the connecting seat 1 has a transmission cavity 6 inside, and the inner side wall of the connecting seat 1 has an arc-shaped groove 7 that communicates with the transmission cavity 6. The arc of the arc-shaped groove 7 is coaxial with the water-cooled wall tube. A connecting plate 8 is slidably connected to the inner wall of the arc-shaped groove 7, and the outer end of the connecting plate 8 is connected to the arc-shaped plate 2.

[0031] Specifically, the transmission mechanism 4 drives the connecting plate 8, causing the connecting plate 8 to slide circumferentially along the trajectory of the arc groove 7; the connecting plate 8 then drives the arc plate 2 and the impurity removal mechanism 3 to swing back and forth in an arc along the outer wall of the water-cooled wall tube.

[0032] Preferably, the transmission mechanism 4 includes: The second driving component 41 is located in the transmission cavity 6 and can be a forward and reverse motor. The output end of the second driving component 41 is provided with a gear 42. The lower arc plate 43 is located on the outer wall of the connecting plate 8, and the lower arc plate 43 is provided with an arc-shaped toothed plate 44 that meshes with the gear 42.

[0033] Specifically, starting the second driving component 41 drives the gear 42 to rotate, the gear 42 meshes with and drives the arc-shaped toothed plate 44, and the arc-shaped toothed plate 44 drives the connecting plate 8 to slide in an arc along the arc groove 7; by controlling the forward and reverse rotation of the second driving component 41, the connecting plate 8 and the arc plate 2 can be reciprocated to achieve the reciprocating grinding of the impurity removal mechanism 3.

[0034] Preferably, the outer end of the connecting plate 8 is connected to a sleeve plate 9, the sleeve plate 9 has an inner groove 10, the inner groove 10 is slidably connected to an inner connecting plate 11 connected to the arc plate 2, and an elastic element 12 is provided between the inner connecting plate 11 and the inner wall of the inner groove 10. The elastic element 12 can be a combination of a compression spring and a damper.

[0035] With this design, when there is a local bulge in the water-cooled wall tube or the grinding roller 32 is worn, the arc plate 2 is forced inward, which drives the inner plate 11 to slide into the inner groove 10 of the sleeve plate 9, compressing the elastic element 12; when the tube wall is locally concave or the grinding roller 32 is worn thin, the elastic element 12 releases its elastic force, pushing the inner plate 11 to extend outward, so that the grinding roller 32 continues to stick to the tube wall.

[0036] The elastic element 12 can automatically expand and contract to compensate for local deformation of the pipe wall, pipe diameter deviation, and wear of the grinding roller 32, always maintaining a stable contact pressure between the grinding roller 32 and the outer wall of the water-cooled pipe. This avoids excessive grinding pressure that could damage the pipe wall or insufficient pressure that could result in incomplete cleaning, and the grinding pressure is automatically maintained within a reasonable range. In addition, the floating state can absorb impact, reduce grinding vibration, and better protect the components.

[0037] Preferably, a rotating rod 13 is rotatably mounted on the inner plate 11, and a transition plate 14 connected to the outer wall of the arc plate 2 is provided on the rotating rod 13. A fastening bolt 15 for pressing against the rotating rod 13 is threadedly connected to the outer wall of the inner plate 11.

[0038] Specifically, when using it, first loosen the fastening bolt 15 to release the lock on the rotating rod 13; rotate the rotating rod 13, which will cause the adapter plate 14 and the arc plate 2 to deflect, adjusting the tilt angle of the arc plate 2 relative to the water-cooled wall tube to adapt to different situations; after adjusting to the appropriate angle, tighten the fastening bolt 15 so that its end is pressed against the rotating rod 13, locking the angle of the rotating rod 13 and fixing the posture of the arc plate 2.

[0039] In this embodiment, the abutment mechanism 5 includes: Mounting bracket 51 is connected to the inner wall of connecting seat 1 via adjusting component 52. Adjusting component 52 is used to adjust the distance between mounting bracket 51 and connecting seat 1. The abutment roller 53 is rotatably connected to the mounting frame 51 and is used to abut against the water-cooled wall tube.

[0040] Specifically, by operating the adjustment component 52, the radial distance between the mounting frame 51 and the connecting seat 1 is changed to adapt to water-cooled wall tubes of different outer diameters; the abutment roller 53 on the mounting frame 51 is moved so that the abutment roller 53 fits against the outer wall of the water-cooled wall tube. Multiple abutment mechanisms 5 are adjusted into position in sequence, and the abutment roller 53 supports and positions the device, providing positioning support for the entire device and ensuring that the device and the water-cooled wall tube are coaxial; during the impurity removal operation, the abutment roller 53 can roll, with low axial movement resistance, and the device can be pushed along the axial direction of the water-cooled wall tube to achieve continuous impurity removal of the entire pipeline.

[0041] Preferably, the adjustment component 52 includes: A stud 521 is provided on the inner side wall of the connecting seat 1, and an adjusting cylinder 522 that is rotatably connected to the mounting bracket 51 is externally threaded onto the stud 521. Side frame 523 is located on the outer wall of stud 521, and mounting bracket 51 is provided with a limiting rod 524 that slides through side frame 523.

[0042] With this design, when the adjusting cylinder 522 is rotated, the adjusting cylinder 522 makes a threaded feed motion relative to the stud 521; because the limiting rod 524 slides through the side frame 523 to restrict the rotation of the mounting frame 51, the adjusting cylinder 522 only pushes the mounting frame 51 to make radial translation; thereby driving the abutment roller 53 on the mounting frame 51 to move closer to or away from the water-cooled wall tube, so as to achieve precise adjustment of the distance between the connecting seat 1 and the tube wall.

[0043] Preferably, at least one connecting rod 16 is provided on one outer wall of the connecting seat 1, and a socket rod 17 adapted to be inserted into the connecting rod 16 is provided on the other side of the connecting seat 1. The socket rod 17 and the connecting rod 16 are detachably connected.

[0044] This design allows for easy assembly of multiple connector seats 1. When assembling multiple connector seats 1, align the connecting rod 16 of one connector seat 1 with the socket rod 17 of another connector seat 1, and insert the connecting rod 16 to complete the alignment between the two connector seats 1. After alignment, locking is achieved. When disassembly is required, release the lock and pull the connecting rod 16 directly from the socket rod 17 to separate the connector seats 1. This design simplifies assembly and disassembly, facilitating equipment disassembly and transport into the confined space of a boiler. Quick alignment and assembly reduce setup time. The number of connector seats 1 can be increased or decreased according to site requirements, enabling modular assembly.

[0045] In this embodiment, the connecting rod 16 has multiple fixing holes 18 through it, and the sleeve rod 17 has a connecting hole 19 that matches the fixing holes 18.

[0046] This design involves inserting the connecting rod 16 into the socket rod 17, adjusting the insertion depth according to the required overall inner diameter of the assembly; aligning a fixing hole 18 on the connecting rod 16 with the connecting hole 19 on the socket rod 17; and then locking the locking pin or bolt through the aligned connecting hole 19 and fixing it to the fixing hole 18. By changing the insertion depth, the assembly inner diameter of the device can be finely adjusted to accommodate water-cooled wall tubes of different outer diameters.

[0047] It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various modifications or changes based on them. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0049] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

Claims

1. A device for removing impurities from boiler water-cooled wall tubes, characterized in that, include: Connecting base (1), multiple of which are detachably connected to each other; An arc-shaped plate (2) is disposed on the inner side wall of the connecting seat (1) and is coaxially corresponding to the water-cooled wall tube; The impurity removal mechanism (3) is located on the side of the arc plate (2) away from the connecting seat (1) and at least two are provided, for grinding and removing impurities from the outer wall of the water-cooled wall tube; The transmission mechanism (4) is located inside the connecting seat (1) and is used to drive the arc plate (2) to reciprocate along the outer wall of the water-cooled wall tube; Multiple sets of abutment mechanisms (5) are provided on the inner wall of the connecting seat (1) for abutting the outer wall of the water-cooled wall tube and adjusting the distance between the connecting seat (1) and the water-cooled wall tube.

2. The boiler water-cooled wall tube impurity removal device according to claim 1, characterized in that, The impurity removal mechanism (3) includes: Two support plates (31) are provided on the inner sidewall of the arc plate (2). A rotating shaft is rotatably connected to each of the two support plates (31), and a grinding roller (32) is detachably connected between the two rotating shafts. The first drive element (33) is mounted on one of the support plates (31), and the output end of the first drive element (33) is connected to the rotating shaft.

3. The impurity removal device for boiler water-cooled wall tubes according to claim 1, characterized in that, The connecting seat (1) has a transmission cavity (6) inside. The inner side wall of the connecting seat (1) has an arc-shaped groove (7) that communicates with the transmission cavity (6). The inner wall of the arc-shaped groove (7) is slidably connected to a connecting plate (8). The outer end of the connecting plate (8) is connected to the arc-shaped plate (2).

4. The impurity removal device for boiler water-cooled wall tubes according to claim 3, characterized in that, The transmission mechanism (4) includes: The second driving member (41) is located in the transmission cavity (6), and the output end of the second driving member (41) is provided with a gear (42). The lower arc plate (43) is provided on the outer wall of the connecting plate (8), and the lower arc plate (43) is provided with an arc-shaped toothed plate (44) that meshes with the gear (42).

5. The impurity removal device for boiler water-cooled wall tubes according to claim 3, characterized in that, The outer end of the connecting plate (8) is connected to a sleeve plate (9), and an inner groove (10) is provided inside the sleeve plate (9). The inner groove (10) is slidably connected to an inner connecting plate (11) connected to the arc plate (2). An elastic element (12) is provided between the inner connecting plate (11) and the inner wall of the inner groove (10).

6. The impurity removal device for boiler water-cooled wall tubes according to claim 5, characterized in that, A rotating rod (13) is rotatably mounted on the inner plate (11). A transition plate (14) connected to the outer wall of the arc plate (2) is provided on the rotating rod (13). A fastening bolt (15) for abutting the rotating rod (13) is threadedly connected to the outer wall of the inner plate (11).

7. The impurity removal device for boiler water-cooled wall tubes according to claim 1, characterized in that, The contact mechanism (5) includes: The mounting bracket (51) is connected to the inner wall of the connecting seat (1) via an adjustment component (52), the adjustment component (52) being used to adjust the distance between the mounting bracket (51) and the connecting seat (1); The abutment roller (53) is rotatably connected to the mounting frame (51) and is used to abut against the water-cooled wall tube.

8. The boiler water-cooled wall tube impurity removal device according to claim 7, characterized in that, The adjustment component (52) includes: A stud (521) is provided on the inner side wall of the connecting seat (1), and an adjusting cylinder (522) that is rotatably connected to the mounting bracket (51) is externally threaded onto the stud (521). A side frame (523) is provided on the outer wall of the stud (521), and a limiting rod (524) that slides through the side frame (523) is provided on the mounting bracket (51).

9. A boiler water-cooled wall tube impurity removal device according to claim 1, characterized in that, The outer wall of one side of the connector (1) is provided with at least one connecting rod (16), and the other side of the connector (1) is provided with a socket rod (17) that is adapted to be inserted into the connecting rod (16). The socket rod (17) and the connecting rod (16) are detachably connected.

10. A boiler water-cooled wall tube impurity removal device according to claim 9, characterized in that, The connecting rod (16) has multiple fixing holes (18) through it, and the sleeve rod (17) has a connecting hole (19) that matches the fixing holes (18).

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