A steel structure chimney internal maintenance platform

Abstract

This invention relates to the field of maintenance technology for the interior of steel chimneys, and discloses a maintenance platform for the interior of a steel chimney, including a base, a support fixedly connected to the top of the base, a platform lifting device above the base, a platform retraction device above the base, and a stabilizing cleaning device above the base. The platform lifting device includes a one-way electric actuator, the surface of which is fixedly connected to the inner wall of the support, and a slot is formed in the inner wall of the base. When the one-way electric actuator is activated, its output end drives the extrusion plate to move up and down. When the extrusion plate moves, it extrudes the inclined plate, thereby driving the pulley to slide inside the slide rail. The telescopic rod makes the position of the pulley more stable when it moves, avoiding positional deviation that could cause the maintenance platform to shift and endanger maintenance personnel. At the same time, when the pulley moves to the end of the slide rail, the one-way electric actuator continues to move upward, which, through extrusion, drives the dust collection box to push the maintenance platform upward as well.

Description

Technical Field

[0001] This invention relates to the field of maintenance technology for the interior of steel chimneys, specifically to a maintenance platform for the interior of steel chimneys. Background Technology

[0002] Steel chimneys are steel structures used in high-rise residential buildings to discharge flue gas. Their main materials include stainless steel, titanium-steel composite plates, and carbon steel, and they are characterized by excellent thermal insulation and high durability. Their design must meet requirements such as material stability and adaptability for high-altitude construction. Steel chimneys can be classified by structure into integral, prefabricated (such as double-layer insulated stainless steel chimneys), sleeve, or multi-tube types.

[0003] An existing maintenance platform for the interior of a steel chimney typically uses a single hydraulic cylinder for lifting and lowering. However, this provides insufficient support, causing the platform to shift position during operation. This can lead to accidents such as bumps and knocks, and tools slipping due to the platform's instability, when maintenance personnel are working inside the chimney. Summary of the Invention

[0004] The purpose of this invention is to provide a maintenance platform for the interior of a steel chimney to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: The present invention is a maintenance platform for the interior of a steel structure chimney, including a base, a bracket fixedly connected to the top of the base, a platform lifting device, a platform retraction device, and a stabilizing cleaning device. The platform lifting device includes a one-way electric actuator. The surface of the one-way electric actuator is fixedly connected to the inner wall of the support. The inner wall of the base has a slot. A hinge rod is fixedly connected to the inner wall of the slot. A lifting frame is hingedly connected to the surface of the hinge rod. A force plate is fixedly connected to the end of the lifting frame away from the hinge rod. A maintenance platform is fixedly connected to the top of the force plate. A dust collection box is fixedly connected to the bottom of the maintenance platform. A slide rail is fixedly connected to the bottom of the dust collection box. A pulley is slidably connected to the inner wall of the slide rail. An inclined plate is hingedly connected to the surface of the pulley. A pressing plate is hingedly connected to the end of the inclined plate away from the pulley. A telescopic rod is fixedly connected to the inner wall of the slide rail.

[0006] Furthermore, the hinge rod passes through the lifting frame and extends to the inner wall surface of the slot, the maintenance platform is located above the force application plate, the extrusion plate is located below the dust collection box, and there are four telescopic rods.

[0007] Furthermore, the pulley passes through the slide rail and extends to the outer end of the inclined plate, the end of the telescopic rod away from the slide rail is fixedly connected to the surface of the pulley, the output end of the one-way electric push rod is fixedly connected to the bottom of the extrusion plate, and the inclined plate is located at a position where the extrusion plate and the pulley are close to each other.

[0008] Furthermore, the platform retraction device includes a support plate, the end of which is fixedly connected to the surface of the dust collection box. A motor is fixedly connected to the inner wall of the support plate. An extension platform is slidably connected to the inner wall of the maintenance platform. A groove is provided on the inner wall of the maintenance platform. A protective fence is slidably connected to the inner wall of the groove. A tension flexible plate is slidably connected to the inner wall of the protective fence. A spring plate is fixedly connected to the bottom of the maintenance platform. A reset elastic plate is fixedly connected to the bottom of the maintenance platform. A rotating rod is fixedly connected to the output end of the motor. A threaded rod is fixedly connected to the end of the rotating rod away from the motor. A gear is fixedly connected to the surface of the rotating rod. A rack is meshed with the surface of the gear. A telescopic inner rail is fixedly connected to the bottom of the maintenance platform. A telescopic outer rail is slidably connected to the surface of the telescopic inner rail. A fixed telescopic rod is fixedly connected to the inner wall of the telescopic inner rail. A push-pull rod is fixedly connected to the surface of the protective fence. A movable push plate is threadedly connected to the surface of the threaded rod.

[0009] Furthermore, the surface of the protective fence is adapted to the surface of the extension platform, the surface of the protective fence is slidably connected to the inner wall of the telescopic inner rail, the protective fence passes through the slide groove and extends to the inner wall of the telescopic inner rail, and the end of the fixed telescopic rod away from the telescopic inner rail is fixedly connected to the surface of the protective fence.

[0010] Furthermore, the end of the push-pull rod away from the protective fence is fixedly connected to the end of the rack, the threaded rod passes through the dust collection box and extends to the outer end of the dust collection box, and the surface of the threaded rod is adapted to the inner wall of the dust collection box.

[0011] Furthermore, the end of the movable push plate away from the threaded rod is fixedly connected to the surface of the protective fence, the end of the elastic plate away from the maintenance platform is fixedly connected to the bottom of the extension platform, and the end of the reset elastic plate away from the maintenance platform is fixedly connected to the bottom of the telescopic outer rail.

[0012] Furthermore, the stable cleaning device includes a support frame, the bottom of which is fixedly connected to the top of the protective fence. A guide plate is slidably connected to the inner wall of the support frame. An elastic rod is fixedly connected to the surface of the guide plate. A retractable rod is fixedly connected to the surface of the support frame. An annular fixing plate is fixedly connected to the end of the retractable rod away from the support frame. A cleaning ring plate is fixedly connected to the surface of the guide plate. A cleaning hole is provided on the inner wall of the maintenance platform. A cleaning brush is threadedly connected to the surface of the threaded rod. A tension rod is fixedly connected to the surface of the cleaning brush. A cleaning door is provided on the inner wall of the dust collection box.

[0013] Furthermore, the end of the elastic rod away from the guide plate is fixedly connected to the surface of the support frame, the bottom of the cleaning ring plate contacts the top of the maintenance platform, the end of the cleaning brush is adapted to the inner wall of the cleaning hole, and the end of the tension rod away from the cleaning brush is fixedly connected to the inner wall of the dust collection box.

[0014] The present invention has the following beneficial effects: When the unidirectional electric actuator of this invention is activated, its output end drives the extrusion plate to move up and down. As the extrusion plate moves, it extrudes the inclined plate, causing the pulley to slide inside the slide rail. The telescopic rod makes the position of the pulley more stable during movement, preventing positional deviation that could cause the maintenance platform to shift and endanger maintenance personnel. At the same time, when the pulley moves to the end of the slide rail, the unidirectional electric actuator continues to move upward, which, through extrusion, drives the dust collection box to push the maintenance platform upward as well. As the maintenance platform moves, it pulls the lifting frame along with it through the force plate. The lifting frame provides secondary support and fixation for the maintenance platform, making it more stable and improving the protection of maintenance personnel when performing maintenance work inside the chimney from above the maintenance platform. In addition, the pulley ensures that the dust collection box and the maintenance platform are moved upward with even force, preventing the maintenance platform from shifting and causing problems such as personnel falling or tools dropping.

[0015] When the motor of this invention is turned on, the output end drives the rotating rod to rotate. The rotation of the rotating rod causes the threaded rod to move as well. As the threaded rod moves, it drives the moving push plates to move closer or further apart via the thread. The moving push plates pull the protective fence to slide within the sliding groove and the telescopic inner rail. When the surface of the protective fence contacts the end of the telescopic inner rail, the continued movement of the protective fence will cause the telescopic outer rail to slide on the surface of the telescopic inner rail through compression. This allows the protective fence to be adjusted according to different chimney diameters, enabling maintenance personnel to fully inspect the inside of the chimney and avoiding the impact of distance on maintenance results. The fixed telescopic rod makes the movement of the protective fence more stable. Simultaneously, the rotation of the rotating rod drives the gear to rotate. The rotation of the gear, through meshing, drives the rack to move, and the rack pushes... The lever pushes the protective fence to adjust its position. When the protective fence separates from the inner wall of the telescopic outer rail, the reset elastic plate resets the telescopic outer rail, allowing the machine to quickly resume its next operation. When the protective fence moves outward, it pulls the stretching plate along with it, ensuring that the protective fence and stretching plate fully protect the maintenance personnel above the maintenance platform. When the protective fence moves outward and contacts the extension platform, its continued movement causes the extension platform to slide outward within the maintenance platform, extending the platform and allowing maintenance personnel to move freely above it for convenient maintenance work inside the chimney. When the protective fence moves inward and separates from the extension platform, the spring plate resets the extension platform using its elasticity.

[0016] When the protective fence of this invention moves outward, it moves the elastic rod via the support frame, which in turn moves the annular fixed plate via the guide plate. This causes the surface of the annular fixed plate to press against the inside of the chimney, ensuring the stability of the maintenance platform even after its height is increased. This prevents the maintenance platform from swaying due to airflow or other factors, thus protecting the safety of maintenance personnel. When the protective fence moves inward, it moves the guide plate along with the support frame. The guide plate then pushes the cleaning ring plate above the maintenance platform. The cleaning ring plate pushes dust and other impurities above the maintenance platform through the cleaning holes into the dust collection box for centralized collection. The dust is then cleaned through the cleaning door. When the threaded rod rotates, it moves the cleaning brush inside the dust collection box, allowing the cleaning brush to clean the inside of the cleaning holes. This prevents dust from accumulating and clogging the cleaning holes, which would affect dust collection. The tension rod limits the cleaning brush's position, preventing the cleaning brush from shifting and causing the machine to jam.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the platform lifting device of the present invention; Figure 4 This is another structural schematic diagram of the platform lifting device of the present invention; Figure 5 This is a schematic diagram of the platform deployment and retraction device of the present invention; Figure 6 This is another structural schematic diagram of the platform deployment and retraction device of the present invention; Figure 7 This is a schematic diagram of the resetting elastic plate structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram of section A in the middle; Figure 9 For the present invention Figure 7 Enlarged structural diagram of section B in the middle; Figure 10 This is a schematic diagram of the stable cleaning device of the present invention; Figure 11 This is another structural schematic diagram of the stable cleaning device of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Base; 2. Support frame; 3. Platform lifting device; 4. Platform retraction device; 5. Stabilizing and cleaning device; 20. One-way electric actuator; 21. Groove; 22. Lifting frame; 23. Force plate; 24. Dust collection box; 25. Maintenance platform; 26. Slide rail; 27. Pulley; 28. Inclined plate; 29. ​​Extrusion plate; 30. Telescopic rod; 31. Hinge rod; 40. Support plate; 41. Motor; 42. Extension platform; 43. Slide groove; 44. Protective fence; 4 5. Tensioning flexible plate; 46. Spring plate; 47. Telescopic outer rail; 48. Reset elastic plate; 49. Rotating rod; 50. Gear; 51. Threaded rod; 52. Rack; 53. Telescopic inner rail; 54. Fixed telescopic rod; 55. Push-pull rod; 56. Moving push plate; 60. Support frame; 61. Guide plate; 62. Elastic rod; 63. Retractable rod; 64. Annular fixed plate; 65. Cleaning ring plate; 66. Cleaning hole; 67. Cleaning brush; 68. Tensioning rod; 69. Cleaning door. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1 - Figure 11 As shown, the present invention is a maintenance platform for the inside of a steel structure chimney, including a base 1, a support 2 fixedly connected to the top of the base 1, a platform lifting device 3 above the base 1, a platform retraction device 4 above the base 1, and a stabilizing cleaning device 5 above the base 1. The platform lifting device 3 includes a one-way electric actuator 20. When the one-way electric actuator 20 is activated, its output end drives the extrusion plate 29 to move up and down. The surface of the one-way electric actuator 20 is fixedly connected to the inner wall of the bracket 2. The inner wall of the base 1 has a slot 21, and a hinge rod 31 is fixedly connected to the inner wall of the slot 21. A lifting frame 22 is hingedly connected to the surface of the hinge rod 31. A force plate 23 is fixedly connected to the end of the lifting frame 22 away from the hinge rod 31. A maintenance platform 25 is fixedly connected to the top of the force plate 23. When the maintenance platform 25 moves, it will pull the lifting frame 22 to move together through the force plate 23. The lifting frame 22 will provide secondary support and fixation for the maintenance platform 25. The bottom of the maintenance platform 25 is fixed. A dust collection box 24 is fixedly connected to the bottom of the dust collection box 24. A slide rail 26 is fixedly connected to the bottom of the dust collection box 24. A pulley 27 is slidably connected to the inner wall of the slide rail 26. When the pulley 27 moves to the end of the slide rail 26, the one-way electric push rod 20 continues to move upward, which will push the dust collection box 24 to push the maintenance platform 25 upward together by squeezing. An inclined plate 28 is hinged to the surface of the pulley 27. An extrusion plate 29 is hinged to the end of the inclined plate 28 away from the pulley 27. When the extrusion plate 29 moves, it will squeeze the inclined plate 28, thereby driving the pulley 27 to slide inside the slide rail 26. A telescopic rod 30 is fixedly connected to the inner wall of the slide rail 26. The telescopic rod 30 makes the position of the pulley 27 more stable when it moves.

[0023] The hinge rod 31 passes through the lifting frame 22 and extends to the inner wall surface of the slot 21. The maintenance platform 25 is located above the force plate 23, the extrusion plate 29 is located below the dust collection box 24, and there are four telescopic rods 30.

[0024] The pulley 27 passes through the slide rail 26 and extends to the outer end of the inclined plate 28. The end of the telescopic rod 30 away from the slide rail 26 is fixedly connected to the surface of the pulley 27. The output end of the one-way electric push rod 20 is fixedly connected to the bottom of the extrusion plate 29. The inclined plate 28 is located at a position where the extrusion plate 29 and the pulley 27 are close to each other.

[0025] The platform extension / retraction device 4 includes a support plate 40, the end of which is fixedly connected to the surface of the dust collection box 24. A motor 41 is fixedly connected to the inner wall of the support plate 40. When the motor 41 is turned on, its output end drives the rotating rod 49 to rotate. An extension platform 42 is slidably connected to the inner wall of the maintenance platform 25. A groove 43 is provided on the inner wall of the maintenance platform 25. A protective fence 44 is slidably connected to the inner wall of the groove 43. When the protective fence 44 moves outward and comes into contact with the extension platform 42, the continued movement of the protective fence 44 will cause the extension platform 42 to slide outward inside the maintenance platform 25 through pressure. A tension plate 45 is slidably connected to the inner wall of the protective fence 44. A spring plate 46 is fixedly connected to the bottom of the maintenance platform 25. The spring plate 46 will reset the extension platform 42 through elastic force. A reset elastic plate 48 is fixedly connected to the bottom of the maintenance platform 25. The reset elastic plate 48 will reset the telescopic outer rail 47 when the protective fence 44 separates from the inner wall of the telescopic outer rail 47. A rotating rod 49 is fixedly connected to the output end of the motor 41. When the rotating rod 49 rotates, it will drive the gear 50 to rotate together. When the rotating rod 49 rotates, it will drive the threaded rod 51 to move together. The rotating rod 49 moves away from the motor. A threaded rod 51 is fixedly connected to the end of the machine 41. When the threaded rod 51 moves, it drives the moving push plate 56 to move closer or further apart through the thread. A gear 50 is fixedly connected to the surface of the rotating rod 49. When the gear 50 rotates, it drives the rack 52 to move through meshing. The rack 52 is meshed with the surface of the gear 50. The rack 52 pushes the protective fence 44 to adjust its position through the push-pull rod 55. A telescopic inner rail 53 is fixedly connected to the bottom of the maintenance platform 25. A telescopic outer rail 47 is slidably connected to the surface of the telescopic inner rail 53. A fixed telescopic rod 54 is fixedly connected to the inner wall of the telescopic inner rail 53. The fixed telescopic rod 54 makes the protective fence 44 more stable when it moves. The surface of the protective fence 44 is fixedly connected to the push-pull rod 55, and the surface of the threaded rod 51 is threadedly connected to the movable push plate 56. When the movable push plate 56 moves, it will pull the protective fence 44 to slide inside the slide groove 43 and the telescopic inner rail 53. When the surface of the protective fence 44 contacts the end of the telescopic inner rail 53, the protective fence 44 continues to move and will push the telescopic outer rail 47 to slide on the surface of the telescopic inner rail 53 by squeezing. This allows the protective fence 44 to be adjusted according to the diameter of the chimney of different sizes.

[0026] The surface of the protective fence 44 is adapted to the surface of the extension platform 42. The surface of the protective fence 44 is slidably connected to the inner wall of the telescopic inner rail 53. The protective fence 44 passes through the slide groove 43 and extends to the inner wall of the telescopic inner rail 53. The end of the fixed telescopic rod 54 away from the telescopic inner rail 53 is fixedly connected to the surface of the protective fence 44.

[0027] The end of the push-pull rod 55 away from the protective fence 44 is fixedly connected to the end of the rack 52. The threaded rod 51 passes through the dust collection box 24 and extends to the outer end of the dust collection box 24. The surface of the threaded rod 51 is adapted to the inner wall of the dust collection box 24.

[0028] The end of the movable push plate 56 away from the threaded rod 51 is fixedly connected to the surface of the protective fence 44, the end of the spring plate 46 away from the maintenance platform 25 is fixedly connected to the bottom of the extension platform 42, and the end of the reset elastic plate 48 away from the maintenance platform 25 is fixedly connected to the bottom of the telescopic outer rail 47.

[0029] The stabilizing cleaning device 5 includes a support frame 60. The support frame 60 drives the elastic rod 62 to move, thereby causing the elastic rod 62 to drive the annular fixed plate 64 to move via the guide plate 61. This causes the surface of the annular fixed plate 64 to press against the inside of the chimney, ensuring stability even after the maintenance platform 25 is raised. The bottom of the support frame 60 is fixedly connected to the top of the protective fence 44. The guide plate 61 is slidably connected to the inner wall of the support frame 60. The guide plate 61 pushes the cleaning ring plate 65 to move above the maintenance platform 25. The surface of the guide plate 61 is fixedly connected to the elastic rod 62, and the surface of the support frame 60 is fixedly connected to the retractable rod 63. The retractable rod 63 extends from the outer edge of the chimney. An annular fixing plate 64 is fixedly connected to the end of the support frame 60. A cleaning ring plate 65 is fixedly connected to the surface of the guide plate 61. The cleaning ring plate 65 pushes dust and other impurities above the maintenance platform 25 through the cleaning hole 66 into the interior of the dust collection box 24. The inner wall of the maintenance platform 25 has a cleaning hole 66. A cleaning brush 67 is threadedly connected to the surface of the threaded rod 51. The cleaning brush 67 cleans the interior of the cleaning hole 66. A tension rod 68 is fixedly connected to the surface of the cleaning brush 67. The tension rod 68 limits the cleaning brush 67 to prevent the cleaning brush 67 from shifting position and causing the machine to jam. A cleaning door 69 is opened on the inner wall of the dust collection box 24.

[0030] The end of the elastic rod 62 away from the guide plate 61 is fixedly connected to the surface of the support frame 60, the bottom of the cleaning ring plate 65 is in contact with the top of the maintenance platform 25, the end of the cleaning brush 67 is adapted to the inner wall of the cleaning hole 66, and the end of the tension rod 68 away from the cleaning brush 67 is fixedly connected to the inner wall of the dust collection box 24.

[0031] In operation, when the one-way electric actuator 20 is activated, its output end drives the extrusion plate 29 to move up and down. As the extrusion plate 29 moves, it extrudes the inclined plate 28, causing the pulley 27 to slide inside the slide rail 26. The telescopic rod 30 makes the position of the pulley 27 more stable during movement, preventing positional shifts that could cause the maintenance platform 25 to shift and endanger maintenance personnel. Simultaneously, when the pulley 27 reaches the end of the slide rail 26, the one-way electric actuator 20 continues to move upwards, extruding the dust collection box 24 and pushing the maintenance platform 25 upwards. As the maintenance platform 25 moves, it pulls the lifting frame 22 along with it via the force plate 23. The lifting frame 22 provides secondary support and fixation for the maintenance platform 25, allowing maintenance personnel to view the chimney from above the maintenance platform 25. During internal maintenance, the system provides greater stability and enhances the protection of maintenance personnel. Simultaneously, the pulley 27 ensures even force distribution when the dust collection box 24 moves the maintenance platform 25 upwards, preventing platform 25 from shifting and thus avoiding falls and tool drops. When the motor 41 is turned on, its output drives the rotating rod 49 to rotate. The rotation of the rotating rod 49 causes the threaded rod 51 to move as well. The movement of the threaded rod 51, via its threads, causes the moving push plates 56 to move closer or further apart. The movement of the moving push plates 56 pulls the protective fence 44, causing it to slide within the slide groove 43 and the telescopic inner rail 53. When the surface of the protective fence 44 contacts the end of the telescopic inner rail 53, the continued movement of the protective fence 44 will compress and drive the telescopic outer rail 4... 7. The protective fence 44 slides on the surface of the telescopic inner rail 53, allowing it to be adjusted according to different chimney diameters. This enables maintenance personnel to thoroughly inspect the inside of the chimney, avoiding interference with inspection results due to excessive distance. The fixed telescopic rod 54 ensures greater stability during movement. Simultaneously, the rotation of the rotating rod 49 drives the gear 50 to rotate, which in turn drives the rack 52 to move. The rack 52 then pushes the protective fence 44 to adjust its position via the push-pull rod 55. The reset elastic plate 48 resets the telescopic outer rail 47 when the protective fence 44 separates from its inner wall, allowing the machine to quickly resume its next operation. When the protective fence 44 moves outward, it... The tension causes the tension plate 45 to stretch together, allowing the protective fence 44 and the tension plate 45 to fully protect the maintenance personnel above the maintenance platform 25. When the protective fence 44 moves outward and contacts the extension platform 42, its continued movement will cause the extension platform 42 to slide outward inside the maintenance platform 25 through pressure, thereby extending the maintenance platform 25 and allowing maintenance personnel to move freely above it, facilitating maintenance work inside the chimney. When the protective fence 44 moves inward and separates from the extension platform 42, the spring plate 46 will reset the extension platform 42 through elasticity. When the protective fence 44 moves outward, it will drive the elastic rod 62 to move through the support frame 60.This causes the elastic rod 62 to move the annular fixed plate 64 via the guide plate 61, making the surface of the annular fixed plate 64 press against the inside of the chimney. This ensures the stability of the maintenance platform 25 even after its height is increased, preventing swaying caused by airflow and other factors that could affect the safety of maintenance personnel. When the protective fence 44 moves inward, it moves the guide plate 61 along with the support frame 60. The guide plate 61 then pushes the cleaning ring plate 65 above the maintenance platform 25. The cleaning ring plate 65 pushes dust and other impurities above the maintenance platform 25 through the cleaning hole 66 into the dust collection box 24 for centralized collection. The dust is then cleaned through the cleaning door 69. When the threaded rod 51 rotates, it moves the cleaning brush 67 inside the dust collection box 24, cleaning the inside of the cleaning hole 66 and preventing dust accumulation that could clog the hole and affect dust collection. The tension rod 68 limits the cleaning brush 67 to prevent it from shifting and jamming the machine.

[0032] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A maintenance platform for the interior of a steel chimney, comprising a base (1), characterized in that: A bracket (2) is fixedly connected to the top of the base (1), a platform lifting device (3) is provided above the base (1), a platform retraction device (4) is provided above the base (1), and a stabilizing cleaning device (5) is provided above the base (1). The platform lifting device (3) includes a one-way electric actuator (20). The surface of the one-way electric actuator (20) is fixedly connected to the inner wall of the support (2). The inner wall of the base (1) is provided with a slot (21). A hinge rod (31) is fixedly connected to the inner wall of the slot (21). A lifting frame (22) is hingedly connected to the surface of the hinge rod (31). A force plate (23) is fixedly connected to the end of the lifting frame (22) away from the hinge rod (31). The top of the force plate (23) is fixedly... A maintenance platform (25) is connected to the bottom of the maintenance platform (25), a dust collection box (24) is fixedly connected to the bottom of the dust collection box (24), a slide rail (26) is fixedly connected to the bottom of the dust collection box (24), a pulley (27) is slidably connected to the inner wall of the slide rail (26), an inclined plate (28) is hinged to the surface of the pulley (27), an extrusion plate (29) is hinged to the end of the inclined plate (28) away from the pulley (27), and a telescopic rod (30) is fixedly connected to the inner wall of the slide rail (26).

2. The maintenance platform for the interior of a steel chimney according to claim 1, characterized in that: The hinge rod (31) passes through the lifting frame (22) and extends to the inner wall surface of the slot (21). The maintenance platform (25) is located above the force plate (23). The extrusion plate (29) is located below the dust collection box (24). There are four telescopic rods (30).

3. The maintenance platform for the interior of a steel chimney according to claim 2, characterized in that: The pulley (27) passes through the slide rail (26) and extends to the outer end of the inclined plate (28). The end of the telescopic rod (30) away from the slide rail (26) is fixedly connected to the surface of the pulley (27). The output end of the one-way electric push rod (20) is fixedly connected to the bottom of the extrusion plate (29). The inclined plate (28) is located at a position where the extrusion plate (29) and the pulley (27) are close to each other.

4. The maintenance platform for the interior of a steel chimney according to claim 3, characterized in that: The platform retraction device (4) includes a support plate (40), the end of which is fixedly connected to the surface of the dust collection box (24). A motor (41) is fixedly connected to the inner wall of the support plate (40). An extension platform (42) is slidably connected to the inner wall of the maintenance platform (25). A slide groove (43) is provided on the inner wall of the maintenance platform (25). A protective fence (44) is slidably connected to the inner wall of the slide groove (43). A tensioning flexible plate (45) is slidably connected to the inner wall of the protective fence (44). A spring plate (46) is fixedly connected to the bottom of the maintenance platform (25). A reset elastic plate (48) is fixedly connected to the bottom of the maintenance platform (25). The motor... (41) has a rotating rod (49) fixedly connected to its output end. The end of the rotating rod (49) away from the motor (41) has a threaded rod (51) fixedly connected to it. The surface of the rotating rod (49) has a gear (50) fixedly connected to it. The surface of the gear (50) has a rack (52) meshing with it. The bottom of the maintenance platform (25) has a telescopic inner rail (53) fixedly connected to it. The surface of the telescopic inner rail (53) has a telescopic outer rail (47) slidably connected to it. The inner wall of the telescopic inner rail (53) has a fixed telescopic rod (54) fixedly connected to it. The surface of the protective fence (44) has a push-pull rod (55) fixedly connected to it. The surface of the threaded rod (51) has a movable push plate (56) threadedly connected to it.

5. A maintenance platform for the interior of a steel chimney according to claim 4, characterized in that: The surface of the protective fence (44) is adapted to the surface of the extension platform (42), the surface of the protective fence (44) is slidably connected to the inner wall of the telescopic inner rail (53), the protective fence (44) passes through the slide groove (43) and extends to the inner wall of the telescopic inner rail (53), and the end of the fixed telescopic rod (54) away from the telescopic inner rail (53) is fixedly connected to the surface of the protective fence (44).

6. A maintenance platform for the interior of a steel chimney according to claim 5, characterized in that: The end of the push-pull rod (55) away from the protective fence (44) is fixedly connected to the end of the rack (52). The threaded rod (51) passes through the dust collection box (24) and extends to the outer end of the dust collection box (24). The surface of the threaded rod (51) is adapted to the inner wall of the dust collection box (24).

7. A maintenance platform for the interior of a steel chimney according to claim 6, characterized in that: The end of the movable push plate (56) away from the threaded rod (51) is fixedly connected to the surface of the protective fence (44), the end of the elastic plate (46) away from the maintenance platform (25) is fixedly connected to the bottom of the extension platform (42), and the end of the reset elastic plate (48) away from the maintenance platform (25) is fixedly connected to the bottom of the telescopic outer rail (47).

8. A maintenance platform for the interior of a steel chimney according to claim 7, characterized in that: The stable cleaning device (5) includes a support frame (60), the bottom of which is fixedly connected to the top of the protective fence (44). A guide plate (61) is slidably connected to the inner wall of the support frame (60). An elastic rod (62) is fixedly connected to the surface of the guide plate (61). A retractable rod (63) is fixedly connected to the surface of the support frame (60). An annular fixing plate (64) is fixedly connected to the end of the retractable rod (63) away from the support frame (60). A cleaning ring plate (65) is fixedly connected to the surface of the guide plate (61). A cleaning hole (66) is opened on the inner wall of the maintenance platform (25). A cleaning brush (67) is threadedly connected to the surface of the threaded rod (51). A tension rod (68) is fixedly connected to the surface of the cleaning brush (67). A cleaning door (69) is opened on the inner wall of the dust collection box (24).

9. A maintenance platform for the interior of a steel chimney according to claim 8, characterized in that: The end of the elastic rod (62) away from the guide plate (61) is fixedly connected to the surface of the support frame (60), the bottom of the cleaning ring plate (65) is in contact with the top of the maintenance platform (25), the end of the cleaning brush (67) is adapted to the inner wall of the cleaning hole (66), and the end of the tension rod (68) away from the cleaning brush (67) is fixedly connected to the inner wall of the dust collection box (24).

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