A boiler overhauling device and method for thermal power plant building

Abstract

The present application relates to the field of boiler maintenance, in particular to a boiler maintenance device and method for thermal power plant, through the driving of the motor one driving gear, cooperate with spiral cooperation and beam track guidance, realize the accurate lifting and stable movement of the maintenance platform, ensure that the staff safely and efficiently maintain the inside of the boiler. Auxiliary positioning ring, electric telescopic rod, extension rod and sliding rod and other components work together, limit the movement of threaded column only along the axial direction, improve the stability and accuracy of the lifting device. At the same time, through the installation ring, auxiliary ring and extension plate and other structure design, convenient to touch the inside wall of the boiler, driven by the control motor, the extension plate moves radially, ensures the stability and synchronization of the extension process. The extension plate can rotate, cooperate with motor two drive, realize all-round maintenance, avoid dead angle, improve work efficiency and safety.

Description

Technical Field

[0001] This invention relates to the field of boiler maintenance, and in particular to a device and method for boiler maintenance in thermal power plants. Background Technology

[0002] The boiler in a thermal power plant is one of the core pieces of equipment in the entire power generation system. It is responsible for burning fuels (such as coal and natural gas) to produce high-temperature, high-pressure steam. The steam then drives the turbine to rotate, which in turn drives the generator to produce electricity. Therefore, the reliable operation of the boiler is crucial to the normal operation of the power plant. However, after long-term operation, boilers will experience problems such as wear, corrosion, and deposits. These problems need to be eliminated through regular maintenance to ensure the efficient and safe operation of the boiler.

[0003] For example, a boiler maintenance device for a thermal power plant, disclosed in CN217921343U, includes a base and a crossbar. The base is equipped with a lifting assembly for raising and lowering the crossbar. A threaded rod is rotatably mounted at the bottom of the crossbar, and an operating platform is mounted on the threaded rod. An auxiliary operating mechanism is located at the bottom of the operating platform. The auxiliary operating mechanism includes an auxiliary operating component and a lower drive component. The auxiliary operating component includes a U-shaped plate fixed to the bottom surface of the operating platform, a bidirectional screw rod rotatably connected to and passing through the U-shaped plate, a movable block threaded onto and connected to the bidirectional screw rod, and an auxiliary platform fixed to the upper surface of the movable block. The upper surface of the auxiliary platform abuts against the bottom surface of the operating platform. By driving the bidirectional screw rod to rotate using the lower drive component, the operator can move the auxiliary platform away from the axis of the threaded rod until the side of the auxiliary platform away from the axis of the threaded rod approaches the inner wall of the boiler, at which point the operator can perform maintenance work on the inner wall of the boiler.

[0004] However, the aforementioned existing technologies still have some problems in practical use:

[0005] 1. When the auxiliary platforms of this device move relative to each other, it will make it inconvenient to inspect the boiler inner wall in the area between the two platforms. In particular, it will be more difficult to conduct close-range inspections of the boiler inner wall in the area between the two auxiliary platforms, thus making it impossible to cover all areas of the boiler inner wall.

[0006] 2. The operating platform is unstable when it moves up and down through the boiler's inner wall, which can easily cause it to shake or sway excessively during operation, posing a potential threat to the safety of workers. Furthermore, the stability between the operating platform and the boiler's inner wall relies primarily on the direct contact between the auxiliary platform and the boiler's inner wall, which is insufficient to provide adequate structural stability and also presents certain safety risks.

[0007] In summary, although existing technologies can improve the ease of maintenance of the furnace inner wall to some extent, they are not enough to perfectly cover the maintenance needs of all areas. At the same time, there are still obvious shortcomings in ensuring operational safety, and there is still room for further improvement and optimization. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a device and method for overhauling boilers in thermal power plants.

[0009] In the first aspect, a boiler maintenance device for a thermal power plant includes two upright frames, two symmetrically distributed crossbeam tracks connecting the two upright frames, a maintenance slide plate sliding on the two crossbeam tracks, a threaded column sliding in the maintenance slide plate, and a maintenance platform connected to the bottom of the threaded column.

[0010] An auxiliary positioning ring is provided below the maintenance slide, and two electric telescopic rods are symmetrically inserted through the maintenance slide. The telescopic ends of the electric telescopic rods are connected to the auxiliary positioning ring. Multiple extension rods that slide through the maintenance slide are provided circumferentially at the upper end of the auxiliary positioning ring. The horizontal cross-section of the extension rod is a U-shaped groove structure, and the U-shaped groove passes through the extension protrusion and the auxiliary positioning ring. A sliding rod is longitudinally slidable in the U-shaped groove of the extension rod. An inverted L-shaped rod is connected to the bottom of the sliding rod, and the bottom of the L-shaped rod is connected to the maintenance platform.

[0011] Preferably, the maintenance slide is provided with two symmetrically distributed I-shaped blocks, which are slidably disposed in the crossbeam track, and the crossbeam track is provided with guide rods. The I-shaped blocks are provided with through holes for the guide rods to slide through. One of the guide rods is a threaded rod, which is threadedly connected to the I-shaped block. A drive motor connected to the threaded rod is installed on one of the column frames.

[0012] Preferably, the inner diameter of the auxiliary positioning ring is larger than the outer diameter of the maintenance platform to ensure that the maintenance platform can pass smoothly through the auxiliary positioning ring;

[0013] A limiting ring is provided at the lower end of the auxiliary positioning ring for positioning the auxiliary positioning ring with the upper port of the boiler.

[0014] Preferably, a driven gear is rotatably provided on the maintenance slide, and the driven gear is sleeved on the threaded column and threadedly connected to the threaded rod. A motor is installed at the bottom of the maintenance slide, and the drive end of the motor rotates through the maintenance slide and is provided with a driving gear, and the driving gear meshes with the driven gear.

[0015] Preferably, the outer side wall of the threaded column is symmetrically provided with two strip grooves, and the inner side wall of the auxiliary positioning ring is symmetrically provided with two limiting strips, with the end of the limiting strip away from the auxiliary positioning ring slidingly disposed in the strip groove.

[0016] Preferably, an extension component is provided at the bottom of the maintenance platform. The extension component includes a mounting ring, which is rotatably disposed at the bottom of the maintenance platform and is on the same axis as the maintenance platform. Multiple protrusions are evenly opened circumferentially on the side wall of the mounting ring, and an extension plate is slidably disposed in the protrusions.

[0017] An auxiliary ring is rotatably provided at the bottom of the maintenance platform. The auxiliary ring is located inside the mounting ring and is coaxial with the mounting ring. The side wall of the auxiliary ring has an auxiliary opening for the extension plate to pass through.

[0018] Preferably, the bottom of the mounting ring and the auxiliary ring is provided with a connecting sub-plate, and a control shaft is rotatably provided on the connecting sub-plate at the position corresponding to the extension plate. A control gear is installed on the control shaft, and a control rack is arranged radially along the bottom of the extension plate along the mounting ring, and the control rack meshes with the corresponding control gear.

[0019] Preferably, a connecting rail is provided between the mounting ring and the auxiliary ring, and the rack is slidably positioned on the connecting rail.

[0020] Preferably, the inner sidewall of the auxiliary ring is provided with an internal gear ring, and a mounting bracket is provided at the bottom center of the maintenance platform. A second motor is mounted on the mounting bracket, and a drive gear that meshes with the internal gear ring is mounted on the output end of the second motor.

[0021] Secondly, a method for overhauling a boiler in a thermal power plant, the method comprising the following steps:

[0022] S1: The platform descends, the motor rotates in the forward direction, and through the meshing of the drive gear and driven gear and the rotation of the driven gear and the threaded column, the maintenance platform is lowered to a height where the staff can safely climb. Then the motor reverses to raise the maintenance platform.

[0023] S2: Platform positioning, start the drive motor, drive the threaded rod to rotate, and move the I-shaped block and maintenance slide along the crossbeam track to directly above the boiler.

[0024] S3: Auxiliary positioning and adjustment. The motor drives the gear to rotate, which in turn drives the extension component to rotate, covering any position on the inner wall of the boiler.

[0025] S4: Maintenance operation. After the extension component is positioned at a specific location on the inner wall of the boiler, the extension plate is driven to extend, allowing workers to inspect the inner wall of the boiler.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] I. This invention achieves precise lifting and lowering of the maintenance platform by using a motor to drive a drive gear and through gear meshing and screw engagement. During the lifting and lowering process, the guiding effect of the crossbeam track ensures that the maintenance platform moves smoothly to directly above the boiler, facilitating internal maintenance by personnel. This design ensures both operational safety and improved maintenance efficiency.

[0028] Second, this invention ensures the stability of the maintenance platform during the lifting process through the coordinated work of components such as the auxiliary positioning ring, electric telescopic rod, extension rod, and sliding rod. It can also achieve fine adjustment and control, especially under complex working conditions. This design effectively restricts the rotational movement of the threaded column, ensuring that it moves only along the axial direction, thereby improving the stability and accuracy of the device and enhancing the safety and efficiency of maintenance work.

[0029] Third, by setting up structures such as an installation ring, an auxiliary ring, and an extension plate, this invention enables workers to easily access the inner wall of the boiler for maintenance, improving maintenance efficiency and ease of operation. The radial movement of the extension plate is driven by a control motor, ensuring the stability and synchronization of the extension process and reducing operational difficulty and safety risks.

[0030] Fourth, this invention, by incorporating a rotatable extension plate, allows for access to any part of the boiler's inner wall, achieving comprehensive maintenance and avoiding blind spots. Driven by two motors, the extension assembly rotates synchronously on the maintenance platform, further enhancing the comprehensiveness and efficiency of the maintenance process. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0033] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0034] Figure 3 This is a schematic diagram of the structure between the maintenance slide, maintenance platform, and auxiliary positioning ring of the present invention. Figure 1 .

[0035] Figure 4 This is a schematic diagram of the structure between the maintenance slide, maintenance platform, and auxiliary positioning ring of the present invention. Figure 2 .

[0036] Figure 5 This is a schematic diagram of the structure between the auxiliary positioning ring, extension rod, and limiting strip of the present invention.

[0037] Figure 6This is a schematic diagram of the structure of the maintenance platform, sliding rod, L-shaped rod and threaded column of the present invention.

[0038] Figure 7 This is a schematic diagram of the structure between the maintenance platform and the extension component of the present invention. Figure 1 .

[0039] Figure 8 This is a schematic diagram of the structure between the maintenance platform and the extension component of the present invention. Figure 2 .

[0040] Figure 9 This is the present invention. Figure 8 Enlarged view of a portion of point A in the middle.

[0041] Figure 10 This is a bottom view of the elongation component of the present invention.

[0042] In the diagram: 1. Column frame; 2. Crossbeam track; 3. Inspection slide; 4. Threaded column; 5. Inspection platform; 31. Driven gear; 32. Motor 1; 33. Drive gear; 34. I-shaped block; 35. Guide slide rod; 6. Auxiliary positioning ring; 61. Electric telescopic rod; 62. Limiting ring; 63. Extension rod; 64. Sliding rod; 65. L-shaped rod; 41. Strip groove; 66. Limiting strip; 7. Extension assembly; 71. Mounting ring; 72. Extension plate; 73. Auxiliary ring; 74. Connecting sub-plate; 75. Control shaft; 76. Control gear; 77. Control rack; 78. Connecting track; 79. Pulley; 70. Transmission belt; 81. Internal gear ring; 82. Mounting bracket; 83. Motor 2; 84. Drive gear. Detailed Implementation

[0043] The following is in conjunction with the appendix Figures 1-10 The embodiments of the present invention will be described in detail below.

[0044] This application discloses a boiler maintenance device and method for thermal power plants. A motor 32 drives a drive gear 33, which, in conjunction with a screw mechanism and a crossbeam track 2, guides the precise lifting and smooth movement of the maintenance platform 5, ensuring safe and efficient boiler internal maintenance for personnel. Components such as the auxiliary positioning ring 6, electric telescopic rod 61, extension rod 63, and sliding rod 64 work together to restrict the threaded column 4 to move only axially, improving the stability and accuracy of the device. Simultaneously, the structural design of the mounting ring 71, auxiliary ring 73, and extension plate 72 facilitates access to the boiler's inner wall. The extension plate 72, driven by a control motor, moves radially, ensuring stability and synchronization during the extension process. The rotatable design of the extension plate 72, driven by a motor 83, enables omnidirectional maintenance, avoiding blind spots and improving work efficiency and safety.

[0045] Reference Figure 1 and Figure 2As shown, a boiler maintenance device for a thermal power plant includes two upright frames 1, with two symmetrically distributed crossbeam tracks 2 connected between the two upright frames 1. Maintenance slides 3 are slidably mounted on the two crossbeam tracks 2, and threaded columns 4 are slidably mounted in the maintenance slides 3. A maintenance platform 5 is connected to the bottom of the threaded columns 4.

[0046] Reference Figure 3 and Figure 4 As shown, a driven gear 31 is rotatably mounted on the maintenance slide 3, and the driven gear 31 is sleeved on the threaded column 4 and threadedly connected to the threaded rod. A motor 32 is installed at the bottom of the maintenance slide 3. The drive end of the motor 32 rotates through the maintenance slide 3 and is provided with a drive gear 33, and the drive gear 33 meshes with the driven gear 31.

[0047] In this embodiment, motor 32 is started and rotated in the forward direction, thereby driving the drive gear 33 to rotate. The drive gear 33 drives the driven gear 31 to rotate through gear meshing, and the driven gear 31 forms a helical engagement with the threaded column 4, causing the threaded column 4 to descend axially. The descent of the threaded column 4 further drives the maintenance platform 5 to descend synchronously. After descending to a height where workers can easily climb onto the maintenance platform 5, motor 32 reverses, driving the drive gear 33 to rotate in the opposite direction, and the driven gear 31 rotates in the opposite direction accordingly, causing the threaded column 4 and the maintenance platform 5 to rise.

[0048] During the lifting process, when the maintenance platform 5 rises to a height higher than the upper port of the boiler, it further drives the maintenance slide 3 to move along the crossbeam track 2 until the maintenance platform 5 is directly above the boiler. At this time, the motor 32 is restarted. When it rotates in the forward direction, the drive gear 33 rotates, which, through the engagement of the driven gear 31, drives the threaded column 4 and the maintenance platform 5 to descend. Finally, when the maintenance platform 5 is lowered into the upper port of the boiler, personnel can enter the boiler to carry out maintenance work.

[0049] In summary, this invention achieves precise lifting and lowering of the maintenance platform 5 by driving the drive gear 33 with motor 32 and utilizing gear meshing and screw engagement. During the lifting and lowering process, the guiding effect of the crossbeam track 2 ensures that the maintenance platform 5 moves smoothly to directly above the boiler, facilitating internal maintenance by personnel. This design ensures both operational safety and improved maintenance efficiency.

[0050] See Figure 2 As shown, the maintenance slide plate 3 is provided with two symmetrically distributed I-shaped blocks 34. The I-shaped blocks 34 are slidably disposed in the crossbeam rail 2, and the crossbeam rail 2 is provided with guide slide rods 35. The I-shaped blocks 34 are provided with through holes for the guide slide rods 35 to slide through. One of the guide slide rods 35 is a threaded rod, and the threaded rod is threadedly connected to the I-shaped block 34. A drive motor (not shown in the figure) connected to the threaded rod is installed on one of the column frames 1.

[0051] When the drive motor is started, it will drive the threaded rod to rotate. Since the I-shaped block 34 and the threaded rod are connected by a thread, the rotation of the threaded rod will cause the I-shaped block 34 to move along the crossbeam track 2, thereby realizing the overall movement of the entire maintenance slide 3 on the crossbeam track 2. In this way, not only can the position of the maintenance slide 3 be precisely controlled, but the crossbeam track 2 can also provide support for the maintenance platform 5, ensuring the stability and safety of the maintenance platform 5.

[0052] See Figures 3 to 6 As shown, an auxiliary positioning ring 6 is provided below the maintenance slide plate 3, and two electric telescopic rods 61 are symmetrically inserted through the maintenance slide plate 3. The telescopic ends of the electric telescopic rods 61 are connected to the auxiliary positioning ring 6, and the inner diameter of the auxiliary positioning ring 6 is larger than the outer diameter of the maintenance platform 5 to ensure that the maintenance platform 5 can pass smoothly through the auxiliary positioning ring 6. A limiting ring 62 is provided at the lower end of the auxiliary positioning ring 6 for positioning the auxiliary positioning ring 6 with the upper port of the boiler. Multiple extension rods 63 that slide through the maintenance slide plate 3 are provided circumferentially at the upper end of the auxiliary positioning ring 6, and the top of the extension rods 63 is provided with an extension protrusion to prevent the extension rods 63 from detaching from the maintenance slide plate 3.

[0053] It should be noted that the horizontal cross-section of the extension rod 63 is a U-shaped groove structure, and the U-shaped groove passes through the extension protrusion and the auxiliary positioning ring 6. A sliding rod 64 is provided longitudinally within the U-shaped groove of the extension rod 63. The bottom of the sliding rod 64 is connected to an inverted L-shaped rod 65, and the bottom of the L-shaped rod 65 is connected to the maintenance platform 5.

[0054] The purpose of the above design is to stabilize the position of the auxiliary positioning ring 6 during the lifting process. Simultaneously, through the coordination of the auxiliary positioning ring 6 with the extension rod 63, sliding rod 64, and L-shaped rod 65, the stability of the maintenance platform 5 can be maintained throughout the maintenance process. This design is particularly suitable for fine adjustment and control under complex working conditions, ensuring the safe and efficient completion of installation and maintenance work.

[0055] Continue reading Figures 3 to 6 As shown, in order to ensure that the threaded column 4 can move axially smoothly and prevent it from rotating with the driven gear 31, in this embodiment, two strip grooves 41 are symmetrically provided on the outer side wall of the threaded column 4, and two limiting strips 66 are symmetrically provided on the inner side wall of the auxiliary positioning ring 6. The end of the limiting strip 66 away from the auxiliary positioning ring 6 is slidably disposed in the strip groove 41. In this way, the limiting strip 66 can effectively restrict the rotational movement of the threaded column 4, ensuring that the threaded column 4 can only move axially. This design effectively controls the lifting action of the maintenance platform 5 and improves the stability and accuracy of the device operation.

[0056] In summary, the present invention ensures the stability of the maintenance platform 5 during the lifting process through the coordinated work of components such as the auxiliary positioning ring 6, the electric telescopic rod 61, the extension rod 63, and the sliding rod 64. In particular, it can achieve fine adjustment and control even under complex working conditions. This design effectively restricts the rotational movement of the threaded column 4, ensuring that it moves only along the axial direction, thereby improving the stability and accuracy of the device and enhancing the safety and efficiency of maintenance work.

[0057] See Figures 7 to 10 As shown, the present invention has an extension component 7 at the bottom of the maintenance platform 5, which is used to assist the staff to access the inner wall of the boiler through the extension component 7, so as to facilitate their maintenance work.

[0058] Specifically, the extension assembly 7 includes a mounting ring 71, which is rotatably mounted on the bottom of the maintenance platform 5 and is on the same axis as the maintenance platform 5. Multiple protrusions are evenly distributed around the side wall of the mounting ring 71, and an extension plate 72 is slidably mounted inside the protrusions. When the extension plate 72 slides out and abuts against the inner wall of the boiler, the staff can move from the maintenance platform 5 to the extension plate 72 to work. This makes it convenient to inspect and repair the inner wall of the boiler and improves work efficiency.

[0059] Secondly, in order to ensure the stable movement of the extension plate 72, an auxiliary ring 73 is rotatably provided at the bottom of the maintenance platform 5. The auxiliary ring 73 is located inside the mounting ring 71 and is coaxial with the mounting ring 71. The side wall of the auxiliary ring 73 has an auxiliary opening for the extension plate 72 to pass through. During the movement, the extension plate 72 will be guided and supported by the auxiliary ring 73 and the mounting ring 71 to ensure that it smoothly enters and exits the extension opening.

[0060] The bottom of the mounting ring 71 and the auxiliary ring 73 are provided with a connecting plate 74. A control shaft 75 is rotatably provided on the connecting plate 74 at the position corresponding to the extension plate 72. A control gear 76 is installed on the control shaft 75. A control rack 77 is arranged radially along the mounting ring 71 at the bottom of the extension plate 72, and the control rack 77 meshes with the corresponding control gear 76. Rotating the control shaft 75 will drive the control gear 76, thereby driving the control rack 77 to move radially, so that the extension plate 72 also moves radially. This design allows the operator to effectively operate the extension component 7, providing a more convenient operating experience.

[0061] To further improve the stability of the extension plate 72 moving between the mounting ring 71 and the auxiliary ring 73, the present invention provides a connecting rail 78 between the mounting ring 71 and the auxiliary ring 73, and a control rack 77 is slidably disposed on the connecting rail 78. This ensures the smooth movement of the control rack 77, and also helps the control rack 77 to mesh smoothly with the control gear 76, and ensures that the extension plate 72 moves radially and stably between the auxiliary ring 73, the connecting rail 78 and the mounting ring 71.

[0062] Furthermore, in order to achieve synchronous movement and extension of all extension plates 72, the present invention has installed pulleys 79 on all control shafts 75, and all pulleys 79 are connected to each other by a transmission belt 70, so as to achieve synchronous and unidirectional rotation of all control shafts 75. In addition, it should be noted that the accompanying drawings of this specification show the transmission cooperation between the pulleys 79 and the transmission belt 70. The present invention can also use sprockets and chains to achieve synchronous transmission.

[0063] One of the control shafts 75 is connected to the output end of a control motor (not shown in the figure) mounted on the connecting sub-plate 74. The control motor controls the rotation of the control shaft 75, thereby controlling the operation of the elongation assembly 7.

[0064] In summary, this invention, through the unique design of the extension component 7, significantly improves the convenience and safety of maintenance operations. The mounting ring 71 and auxiliary ring 73 structure in the extension component 7 allow the extension plate 72 to stably extend into the inner wall of the boiler for maintenance, reducing the need for personnel to directly enter the boiler. The meshing design of the control gear 76 and the control rack 77 makes the radial movement of the extension plate 72 more precise and controllable, improving operational efficiency. The overall design not only enhances the stability of the extension plate 72 but also ensures precise control of synchronous movement, improving work efficiency while protecting the personal safety of maintenance personnel.

[0065] To ensure that the inner wall of the boiler can be inspected by the staff and to avoid blind spots in the inspection, the extension plate 72 provided in this invention can rotate around the axis of the mounting ring 71, so that the extension plate 72 can contact any position of the inner wall of the boiler, ensuring all-round inspection of the inner wall of the boiler.

[0066] Specifically, see Figure 7 , Figure 8 and Figure 10As shown, an internal gear ring 81 is provided on the inner wall of the auxiliary ring 73, and an installation bracket 82 is provided at the bottom center of the maintenance platform 5. A motor 83 is installed on the installation bracket 82, and a drive gear 84 that meshes with the internal gear ring 81 is installed at the output end of the motor 83. The motor 83 drives the drive gear 84 to rotate, and the auxiliary ring 73 rotates under the meshing of the drive gear 84 and the internal gear ring 81. With the cooperation of the connecting sub-plate 74 and the connecting horizontal rail, the auxiliary ring 73, the installation ring 71, the extension plate 72, the connecting sub-plate 74 and the connecting rail 78 can rotate synchronously. That is, the rotation adjustment of the extension assembly 7 at the bottom of the maintenance platform 5 can be realized, so that any position of the inner wall of the boiler can be inspected, improving the comprehensiveness of the inspection.

[0067] In summary, by incorporating a rotatable extension plate 72, this invention allows for comprehensive inspection of any part of the boiler's inner wall, eliminating blind spots. Driven by motor 83, the extension assembly 7 rotates synchronously on the inspection platform 5, further enhancing the thoroughness and efficiency of the inspection.

[0068] In addition, this invention also discloses a method for overhauling a boiler in a thermal power plant, the method comprising the following steps:

[0069] S1: The platform descends, and the drive motor 32 is turned on to rotate in the forward direction. The driving gear 33 of the drive motor 32 drives the driven gear 31 to rotate through gear meshing. The driven gear 31 and the threaded column 4 form a helical engagement. The threaded column 4 descends axially, and the descent of the threaded column 4 drives the maintenance platform 5 to descend synchronously until it reaches a height that is safe for workers to climb. Then, the motor 32 reverses to raise the platform to a suitable position.

[0070] S2: Platform positioning, start the drive motor for moving the maintenance slide 3, the drive motor drives the threaded rod to rotate, and drives the I-shaped block 34, which is threadedly connected to the threaded rod, to move along the crossbeam track 2. The movement of the I-shaped block 34 drives the maintenance slide 3 to move as a whole along the crossbeam track 2 until the maintenance platform 5 moves to the position directly above the boiler.

[0071] S3: Auxiliary positioning and adjustment. The extension component 7 at the bottom of the maintenance platform 5 includes an installation ring 71 and an auxiliary ring 73. Driven by the motor 83, the drive gear 84 meshing with the inner wall of the installation ring 71 rotates, thereby driving the auxiliary ring 73 to rotate. The rotation of the auxiliary ring 73 drives the installation ring 71, the extension plate 72, the connecting sub-plate 74, and the connecting track 78 to rotate synchronously, so that the extension plate 72 can cover any position of the inner wall of the boiler, realizing all-round maintenance.

[0072] S4: Maintenance operation. As needed, the extension assembly 7 is rotated and adjusted on the maintenance platform 5 by controlling motor 83 to position it at a specific maintenance location on the inner wall of the boiler. The control motor is started to make all control shafts 75 rotate synchronously. The extension plate 72 is driven from the maintenance platform 5 to the inner wall of the boiler through pulley 79 and transmission belt 70. The staff stands on the platform or the extension plate 72 and uses the extension plate 72 to inspect and repair the inner wall of the boiler, ensuring a comprehensive maintenance of the inner wall of the boiler.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0074] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A boiler overhauling device for a thermal power plant building, comprising two upright column frames (1), two symmetrically distributed beam tracks (2) being connected between the two upright column frames (1), characterized in that Two beam tracks (2) are provided with a maintenance sliding disc (3) sliding thereon, the maintenance sliding disc (3) is provided with a threaded column (4) sliding therein, and the threaded column (4) is connected with a maintenance platform (5); An auxiliary positioning ring (6) is arranged below the maintenance sliding disc (3), two electric telescopic rods (61) are symmetrically arranged on the maintenance sliding disc (3), the telescopic ends of the electric telescopic rods (61) are connected to the auxiliary positioning ring (6), a plurality of extension rods (63) slidingly penetrating the maintenance sliding disc (3) are arranged on the upper end of the auxiliary positioning ring (6) in a circumferential direction, the horizontal cross section of the extension rod (63) is a U-shaped groove structure, the U-shaped groove penetrates the extension protrusion and the auxiliary positioning ring (6), a sliding rod (64) is longitudinally arranged in the U-shaped groove of the extension rod (63), the bottom of the sliding rod (64) is connected with an inverted L-shaped rod (65), and the bottom of the L-shaped rod (65) is connected to the maintenance platform (5); The maintenance sliding disc (3) is provided with two symmetrically distributed I-shaped blocks (34), the I-shaped blocks (34) are slidingly arranged in the beam track (2), the beam track (2) is provided with a guide sliding rod (35), the I-shaped blocks (34) are provided with a through hole for the guide sliding rod (35) to slidingly penetrate, and one of the guide sliding rods (35) is a threaded rod, the threaded rod is in threaded connection with the I-shaped block (34), and a driving motor connected with the threaded rod is mounted on one of the column frames (1); The maintenance sliding disc (3) is provided with a driven gear (31) rotating thereon, the driven gear (31) is sleeved on the threaded column (4) and is in threaded connection with the threaded rod, a motor one (32) is mounted on the bottom of the maintenance sliding disc (3), and a driving end of the motor one (32) is provided with a driving gear (33) rotating and penetrating the maintenance sliding disc (3), and the driving gear (33) is in meshing connection with the driven gear (31); An extension assembly (7) is arranged at the bottom of the maintenance platform (5), the extension assembly (7) comprises a mounting ring (71), the mounting ring (71) is rotatably arranged at the bottom of the maintenance platform (5) and is coaxial with the maintenance platform (5), a plurality of extension outlets are uniformly arranged on the side wall of the mounting ring (71) in a circumferential direction, and an extension plate (72) is slidingly arranged in the extension outlet; An auxiliary ring (73) is rotatably arranged at the bottom of the maintenance platform (5), the auxiliary ring (73) is arranged on the inner side of the mounting ring (71) and is coaxial with the mounting ring (71), and an auxiliary opening is arranged on the side wall of the auxiliary ring (73) for the extension plate (72) to penetrate; An inner gear ring (81) is arranged on the inner side wall of the auxiliary ring (73), a mounting bracket (82) is arranged at the center bottom of the maintenance platform (5), a motor two (83) is mounted on the mounting bracket (82), and a driving gear (84) in meshing connection with the inner gear ring (81) is mounted on the output end of the motor two (83).

2. The power plant boiler maintenance device according to claim 1, characterized in that: The inner diameter of the auxiliary positioning ring (6) is greater than the outer diameter of the maintenance platform (5), so that the maintenance platform (5) can smoothly penetrate the auxiliary positioning ring (6); A limiting ring (62) is arranged at the lower end of the auxiliary positioning ring (6) for positioning the auxiliary positioning ring (6) and the upper port of the boiler.

3. The power plant boiler maintenance device according to claim 1, characterized in that: The outer wall of the threaded column (4) is symmetrically provided with two strip-shaped sliding grooves (41), and the inner wall of the auxiliary positioning ring (6) is symmetrically provided with two limiting strips (66), and one end of the limiting strip (66) away from the auxiliary positioning ring (6) is slidably arranged in the strip-shaped sliding groove (41).

4. The power plant boiler maintenance device according to claim 1, characterized in that: The mounting ring (71) and the auxiliary ring (73) are provided with a connecting secondary plate (74) at the bottom, a control shaft (75) is rotatably arranged on the connecting secondary plate (74) and corresponds to the position of the elongated plate (72), a control gear (76) is mounted on the control shaft (75), the bottom of the elongated plate (72) is provided with a control rack (77) arranged along the radial direction of the mounting ring (71), and the control rack (77) is engaged with the corresponding control gear (76).

5. The power plant boiler maintenance device according to claim 1, characterized in that: The mounting ring (71) and the auxiliary ring (73) are provided with a connecting track (78), and the control rack (77) is slidably arranged on the connecting track (78).

6. A method for overhauling a boiler of a thermal power plant building, comprising a device for overhauling a boiler of a thermal power plant building according to any one of claims 1 to 5, characterized in that: The maintenance method comprises the following steps: S1: platform lowering, motor one (32) forward rotation, through the meshing of driving gear (33) and driven gear (31) and the rotation of driven gear (31) and threaded column (4), make the maintenance platform (5) descend to the height of safe climbing of workers, then reverse motor one (32) to make the maintenance platform (5) rise; S2: platform positioning, start the driving motor to drive the threaded rod to rotate, drive the work block (34) and the maintenance sliding disc (3) to move along the cross beam track (2) to the top of the boiler; S3: auxiliary positioning and adjustment, motor two (83) drives the driving gear (84) to rotate, drives the elongated assembly (7) to rotate, covers the inner side wall of the boiler at any position; S4: maintenance work, after the elongated assembly (7) is positioned to the specific position of the inner side wall of the boiler, drive the elongated plate (72) to extend, for workers to maintain the inner side wall of the boiler.

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