Thermal power plant boiler overhauling device and method

Abstract

The invention relates to the field of boiler maintenance, in particular to a thermal power plant boiler maintenance device and method, accurate lifting and stable movement of a maintenance platform are realized through driving a driving gear by a motor I, matching with a screw and guiding by a cross beam track, and a worker is ensured to safely and efficiently maintain the interior of a boiler. The auxiliary positioning ring, the electric telescopic rod, the extension rod, the sliding rod and other assemblies work cooperatively, the threaded column is limited to move only in the axial direction, and the stability and accuracy of the device are improved. Meanwhile, through the structural design of the mounting ring, the auxiliary ring, the extension plate and the like, the inner side wall of the boiler can be touched conveniently, the extension plate is driven by the control motor to move radially, and stability and synchronism in the telescopic process are ensured. And the extension plate is designed to be rotatable and is matched with driving of the second motor, all-directional maintenance is achieved, dead corners are avoided, and working efficiency and safety are improved.

Description

Technical Field

[0001] The invention relates to the field of boiler maintenance, and in particular to a boiler maintenance device and method for a thermal power plant. Background Art

[0002] The boiler of a thermal power plant is one of the core equipment of the entire power generation system. It is responsible for burning fuel (such as coal, natural gas, etc.) to produce high-temperature and high-pressure steam, which then drives the turbine to rotate and drives the generator to generate electricity. Therefore, the reliable operation of the boiler is crucial to the normal operation of the power plant. However, after long-term operation, the boiler will experience problems such as wear, corrosion, and deposition. 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 with a publication number of CN217921343U includes a base and a crossbar, a lifting assembly for lifting the crossbar is arranged on the base, a threaded rod is rotatably mounted at the bottom of the crossbar, an operating platform is arranged on the threaded rod, an auxiliary operation mechanism is arranged at the bottom of the operating platform, the auxiliary operation mechanism includes an auxiliary operation assembly and a lower drive assembly, the auxiliary operation assembly includes a U-shaped plate fixed to the bottom surface of the operating platform, a bidirectional screw rod penetrating and rotatably connected to the U-shaped plate, a movable block sleeved on the bidirectional screw rod and threadedly connected, and an auxiliary platform fixed to the upper surface of the movable block, and the upper surface of the auxiliary platform abuts against the bottom surface of the operating platform. The staff drives the bidirectional screw rod to rotate through the lower drive assembly, so that the auxiliary platform moves toward the side away from the axis of the threaded rod, until the side of the auxiliary platform away from the axis of the threaded rod is close to the inner wall of the boiler, and the staff can perform maintenance work on the inner wall of the boiler.

[0004] However, the above existing technologies still have some problems in actual use:

[0005] 1. When the auxiliary platforms of the device are moving relative to each other, it will cause inconvenience in the maintenance of the inner wall of the boiler in the area between the two platforms, especially it will become more difficult to perform close-range maintenance on the inner wall of the boiler in the area between the two auxiliary platforms, so that all areas of the inner wall of the boiler cannot be covered.

[0006] 2. The operating platform is unstable when it passes through the inner wall of the boiler and is lifted and lowered, which can easily cause the operating platform to shake or shake too much during operation, posing a potential threat to the safety of the staff. In addition, the stability between the operating platform and the inner wall of the boiler mainly depends on the direct contact between the auxiliary platform and the inner wall of the boiler, which is not enough to provide sufficient structural stability and poses certain safety risks.

[0007] In summary, although the existing technology can improve the convenience of maintenance of the furnace inner wall to a certain extent, it is still not enough to perfectly cover the maintenance needs of all areas. At the same time, there are obvious deficiencies in ensuring operational safety, and there is still room for further improvement and optimization. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a boiler maintenance device and method for a thermal power plant.

[0009] In a first aspect, a boiler maintenance device for a thermal power plant comprises two column frames, two symmetrically distributed beam rails are connected between the two column frames, a maintenance slide plate is slidably provided on the two beam rails, a threaded column is slidably provided in the maintenance slide plate, and a maintenance platform is 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 passed through the maintenance slide, the telescopic ends of the electric telescopic rods are connected to the auxiliary positioning ring, and a plurality of extension rods slidingly passed through the maintenance slide are circumferentially provided on 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 slidably provided 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 plate is provided with two symmetrically distributed I-shaped blocks, the I-shaped blocks are slidably arranged in the crossbeam track, and a guide slide rod is arranged in the crossbeam track, and a through hole is opened in the I-shaped block for the guide slide rod to slide through, one of the guide slide rods is set as a threaded rod, and the threaded rod is threadedly connected to the I-shaped block, and a driving 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, so as to ensure that the maintenance platform can pass through the auxiliary positioning ring smoothly;

[0013] A limiting ring is provided at the lower end of the auxiliary positioning ring to position the auxiliary positioning ring and 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, and a motor 1 is installed at the bottom of the maintenance slide, and a driving gear is provided after the driving end of the motor 1 rotates through the maintenance slide, and the driving gear is meshed with the driven gear.

[0015] Preferably, two strip-shaped sliding grooves are symmetrically provided on the outer side wall of the threaded column, and two limit strips are symmetrically provided on the inner side wall of the auxiliary positioning ring, and one end of the limit strip away from the auxiliary positioning ring is slidably arranged in the strip-shaped sliding groove.

[0016] Preferably, an extension component is provided at the bottom of the maintenance platform, and the extension component includes a mounting ring, which is rotatably provided at the bottom of the maintenance platform and is on the same axis as the maintenance platform, and a plurality of extension openings are evenly opened in the circumferential direction of the side wall of the mounting ring, and an extension plate is slidably provided in the extension opening;

[0017] An auxiliary ring is rotatably arranged at the bottom of the maintenance platform. The auxiliary ring is located inside the mounting ring and is arranged coaxially with the mounting ring. An auxiliary opening for the extension plate to pass through is opened on the side wall of the auxiliary ring.

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

[0019] Preferably, a connecting track is provided between the mounting ring and the auxiliary ring, and the control rack is slidably arranged on the connecting track.

[0020] Preferably, an inner gear ring is provided on the inner side wall of the auxiliary ring, a mounting bracket is provided at the central bottom of the maintenance platform, motor 2 is mounted on the mounting bracket, and a driving gear meshing with the inner gear ring is mounted on the output end of motor 2.

[0021] In a second aspect, a method for overhauling a boiler in a thermal power plant is provided, the overhaul method comprising the following steps:

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

[0023] S2: The platform is positioned, and the drive motor is started to drive the threaded rod to rotate, driving the I-block and the inspection slide plate to move along the crossbeam track to just above the boiler.

[0024] S3: Auxiliary positioning and adjustment, the second motor drives the driving gear to rotate, driving the extension component to rotate, covering any position of the inner wall of the boiler.

[0025] S4: Maintenance operation: after the extension assembly is positioned at a specific position on the inner wall of the boiler, the extension plate is driven to extend for the staff to inspect the inner wall of the boiler.

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

[0027] 1. The present invention realizes the precise lifting and lowering of the maintenance platform by means of gear meshing and spiral matching through a motor 1. During the lifting and lowering of the platform, combined with the guiding function of the beam track, the maintenance platform is ensured to move smoothly to the top of the boiler, which is convenient for the staff to carry out internal maintenance. This design not only ensures the safety of operation, but also improves the maintenance efficiency.

[0028] 2. The present invention ensures the stability of the maintenance platform during the lifting process through the coordinated work of components such as the auxiliary positioning ring, the electric telescopic rod, the extension rod and the sliding rod, and can also achieve fine adjustment and control under complex working conditions. This design effectively limits the rotational movement of the threaded column, ensuring that it only moves in the axial direction, thereby improving the stability and accuracy of the device's operation and improving the safety and efficiency of maintenance work.

[0029] 3. The present invention provides structures such as mounting rings, auxiliary rings and extension plates, so that workers can easily reach the inner wall of the boiler for maintenance, thereby improving maintenance efficiency and work convenience. The radial movement of the extension plate is driven by a control motor, ensuring the stability and synchronization of the extension and retraction process, and reducing operational difficulty and safety risks.

[0030] Fourth, the present invention provides a rotatable extension plate so that any position of the inner wall of the boiler can be touched, thus achieving all-round maintenance and avoiding the occurrence of blind spots in maintenance. The extension assembly is driven by the second motor to rotate synchronously on the maintenance platform, thereby improving the comprehensiveness and efficiency of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 .

[0033] Figure 2 The structure of the present invention is schematically shown in FIG. 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 It is a schematic diagram of the structure among the auxiliary positioning ring, the extension rod and the limiting strip of the present invention.

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

[0038] Figure 7 The structure diagram of the maintenance platform and the extension assembly of the present invention is shown in FIG. Figure 1 .

[0039] Figure 8 The structure diagram of the maintenance platform and the extension assembly of the present invention is shown in FIG. Figure 2 .

[0040] Fig. 9 The present invention Figure 8 A partial enlarged view of point A in the middle.

[0041] Fig.10 is a bottom plan view of the elongated assembly of the present invention.

[0042] In the figure, 1, column frame; 2, beam track; 3, maintenance slide plate; 4, threaded column; 5, maintenance platform; 31, driven gear; 32, motor one; 33, driving gear; 34, I-shaped block; 35, guide slide rod; 6, auxiliary positioning ring; 61, electric telescopic rod; 62, limit ring; 63, extension rod; 64, sliding rod; 65, L-shaped rod; 41, strip slide groove; 66, limit 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, inner ring; 82, mounting bracket; 83, motor two; 84, driving gear. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-Figure 10 Embodiments of the present invention are described in detail.

[0044] The present application discloses a boiler maintenance device and method for a thermal power plant. The motor 1 32 drives the driving gear 33, and cooperates with the spiral fit and the beam track 2 to guide, so as to achieve the precise lifting and smooth movement of the maintenance platform 5, ensuring that the staff can safely and efficiently inspect the inside of the boiler. The auxiliary positioning ring 6, the electric telescopic rod 61, the extension rod 63 and the sliding rod 64 and other components work together to limit the threaded column 4 to move only in the axial direction, thereby improving the stability and accuracy of the device. At the same time, through the structural design of the mounting ring 71, the auxiliary ring 73 and the extension plate 72, it is convenient to access the inner wall of the boiler, and the extension plate 72 is driven by the control motor to move radially to ensure the stability and synchronization of the telescopic process. The extension plate 72 is rotatable and driven by the motor 2 83 to achieve all-round maintenance, avoid blind spots, and improve work efficiency and safety.

[0045] Reference Figure 1 and Figure 2As shown, a boiler maintenance device for a thermal power plant includes two column frames 1, two symmetrically distributed beam rails 2 are connected between the two column frames 1, a maintenance slide 3 is slidably provided on the two beam rails 2, a threaded column 4 is slidably provided in the maintenance slide 3, and a maintenance platform 5 is connected to the bottom of the threaded column 4.

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

[0047] In this embodiment, the motor 1 32 is started to rotate forward, thereby driving the driving gear 33 to rotate. The driving gear 33 drives the driven gear 31 to rotate through gear meshing, and then a spiral fit is formed between the driven gear 31 and the threaded column 4, so that the threaded column 4 descends axially. The descent of the threaded column 4 further drives the maintenance platform 5 to descend synchronously. After descending to a height where the staff can easily climb onto the maintenance platform 5, the motor 1 32 is reversed to drive the driving gear 33 to rotate in the opposite direction, and the driven gear 31 rotates in the opposite direction, driving the threaded column 4 and the maintenance platform 5 to rise.

[0048] During the lifting process, when the inspection platform 5 is raised to a height higher than the upper port of the boiler, the inspection slide 3 is further driven to move along the crossbeam track 2 until the inspection platform 5 moves to the top of the boiler. At this time, the motor 1 32 is started again. When it rotates forward, the driving gear 33 rotates, and through the cooperation of the driven gear 31, the threaded column 4 and the inspection platform 5 are driven to descend. Finally, when the inspection platform 5 is lowered into the upper port of the boiler, the staff can enter the boiler to perform inspection work.

[0049] In summary, the present invention drives the driving gear 33 through the motor 1 32, and realizes the precise lifting and lowering of the maintenance platform 5 by means of gear meshing and spiral matching; during the lifting and lowering of the platform, combined with the guiding effect of the beam track 2, the maintenance platform 5 is ensured to move smoothly to the top of the boiler, which is convenient for the staff to carry out internal maintenance. This design not only ensures the safety of operation, but also improves the maintenance efficiency.

[0050] See also Figure 2 As shown, two symmetrically distributed I-shaped blocks 34 are provided on the maintenance slide 3, and the I-shaped blocks 34 are slidably arranged in the beam track 2, and a guide slide rod 35 is provided in the beam track 2, and a through hole for the guide slide rod 35 to slide through is opened in the I-shaped block 34, one of the guide slide rods 35 is set as a threaded rod, and the threaded rod is threadedly connected to the I-shaped block 34, and a driving motor (not shown in the figure) connected to the threaded rod is installed on one of the column frames 1.

[0051] When the driving motor is started, the driving motor will drive the threaded rod to rotate. Since the I-shaped block 34 and the threaded rod are threadedly connected, the rotation of the threaded rod will drive the I-shaped block 34 to move along the beam track 2, thereby realizing the overall movement of the entire inspection slide 3 on the beam track 2. In this way, not only can the position of the inspection slide 3 be accurately controlled, but the inspection platform 5 can also be supported by the beam track 2 to ensure the stability and safety of the inspection platform 5.

[0052] See also Figures 3 to 6 As shown, an auxiliary positioning ring 6 is provided below the maintenance slide 3, and two electric telescopic rods 61 are symmetrically passed through the maintenance slide 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 smoothly pass 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 and the upper port of the boiler, a plurality of extension rods 63 which are slidably passed through the maintenance slide 3 are circumferentially provided at the upper end of the auxiliary positioning ring 6, and an extension protrusion is provided on the top of the extension rod 63 to prevent the extension rod 63 from detaching from the maintenance slide 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 extended protrusion and the auxiliary positioning ring 6. A sliding rod 64 is provided in the U-shaped groove of the extension rod 63 for longitudinal sliding. An inverted L-shaped rod 65 is connected to the bottom of the sliding rod 64, 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. At the same time, the auxiliary positioning ring 6 limits and the extended rod 63, the sliding rod 64 and the L-shaped rod 65 work together to maintain the stability of the maintenance platform 5 during the entire maintenance process. This design is particularly suitable for fine adjustment and control under complex working conditions, ensuring that installation and maintenance work is completed safely and efficiently.

[0055] Continue reading Figures 3 to 6 As shown, in order to ensure that the threaded column 4 can smoothly realize axial movement and prevent it from rotating with the driven gear 31, in this embodiment, two strip-shaped slide grooves 41 are symmetrically opened on the outer wall of the threaded column 4, and two limit strips 66 are symmetrically provided on the inner wall of the auxiliary positioning ring 6, and the end of the limit strip 66 away from the auxiliary positioning ring 6 is slidably arranged in the strip-shaped slide groove 41. In this way, the limit strip 66 can effectively limit the rotational movement of the threaded column 4, ensuring that the threaded column 4 can only move in the axial direction. This design effectively controls the lifting and lowering 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, and can also achieve fine adjustment and control under complex working conditions. This design effectively limits the rotational movement of the threaded column 4, ensuring that it only moves in the axial direction, thereby improving the stability and accuracy of the device's operation and improving the safety and efficiency of maintenance work.

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

[0058] Specifically, the extension assembly 7 includes a mounting ring 71, which is rotatably arranged at the bottom of the maintenance platform 5 and is on the same axis as the maintenance platform 5. A plurality of extension openings are evenly arranged on the circumferential side wall of the mounting ring 71, and an extension plate 72 is slidably arranged in the extension opening. 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 through the extension plate 72 to the extension plate 72 to work, so that the inner wall of the boiler can be easily inspected and repaired, thereby improving 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 on the inner side of the mounting ring 71 and is coaxially arranged with the mounting ring 71. The side wall of the auxiliary ring 73 is provided with an auxiliary opening for the extension plate 72 to pass through. The extension plate 72 will be guided and supported by the auxiliary ring 73 and the mounting ring 71 during the movement to ensure that it can smoothly enter and exit the extension opening.

[0060] A connecting sub-plate 74 is provided at the bottom of the mounting ring 71 and the auxiliary ring 73, and a control shaft 75 is rotatably provided on the connecting sub-plate 74 and at a position corresponding to the extension plate 72, and a control gear 76 is installed on the control shaft 75. A control rack 77 is radially arranged along the mounting ring 71 at the bottom of the extension plate 72, and the control rack 77 is meshed with the corresponding control gear 76. Rotating the control shaft 75 will drive the control gear 76, and then drive the control rack 77 to move in the radial direction, so that the extension plate 72 also moves radially. This design enables the staff to effectively control the extension component 7, providing a more convenient operation experience.

[0061] In order to further improve the stability of the extension plate 72 in moving between the mounting ring 71 and the auxiliary ring 73, the present invention is provided with a connecting track 78 between the mounting ring 71 and the auxiliary ring 73, and the control rack 77 is slidably arranged on the connecting track 78, so as to ensure the smooth movement of the control rack 77, and at the same time, this also helps to smoothly mesh the control rack 77 with the control gear 76, and ensure the stable radial movement of the extension plate 72 between the auxiliary ring 73, the connecting track 78 and the mounting ring 71.

[0062] In addition, in order to achieve synchronous movement and extension of all extension plates 72, the present invention installs pulleys 79 on all control shafts 75, and all pulleys 79 are connected by transmission belts 70 to achieve synchronous and unidirectional rotation of all control shafts 75. In addition, it should be noted that the transmission cooperation between the pulleys 79 and the transmission belts 70 is shown in the drawings of this specification, and 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) installed on the connecting sub-plate 74. The rotation of the control shaft 75 is controlled by the control motor, thereby controlling the operation of the extension component 7.

[0064] In summary, the present invention significantly improves the convenience and safety of maintenance operations by designing a unique extension component 7. The mounting ring 71 and the auxiliary ring 73 structure in the extension component 7 enable the extension plate 72 to stably extend into the inner wall of the boiler for maintenance, reducing the need for staff 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, thereby improving operational efficiency. The overall design not only enhances the stability of the extension plate 72, but also ensures the precise control of the synchronous movement, thereby improving work efficiency and protecting the personal safety of maintenance personnel.

[0065] In order to ensure that the inner wall of the boiler can be inspected by the staff and avoid blind spots during inspection, the extension plate 72 provided in the present 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 Fig.10As shown, an inner gear ring 81 is provided on the inner wall of the auxiliary ring 73, and a mounting bracket 82 is provided at the center bottom of the maintenance platform 5. A motor 83 is installed on the mounting bracket 82, and a driving gear 84 meshing with the inner gear ring 81 is installed on the output end of the motor 83. The driving gear 84 is driven to rotate by the motor 83, and then the auxiliary ring 73 is rotated under the meshing of the driving gear 84 and the inner gear ring 81. The auxiliary ring 73 realizes the synchronous rotation of the auxiliary ring 73, the mounting ring 71, the extension plate 72, the connecting sub-plate 74 and the connecting rail 78 in coordination with the connecting sub-plate 74 and the connecting cross rail, that is, the rotation adjustment of the extension component 7 at the bottom of the maintenance platform 5 is realized, so that any position of the inner wall of the boiler can be inspected, thereby improving the comprehensiveness of the inspection.

[0067] In summary, the present invention provides a rotatable extension plate 72 so that any position of the inner wall of the boiler can be touched, thereby achieving all-round maintenance and avoiding the occurrence of maintenance blind spots. The extension assembly 7 is driven by the second motor 83 to rotate synchronously on the maintenance platform 5, thereby improving the comprehensiveness and efficiency of maintenance.

[0068] In addition, the present 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 make it rotate in the forward direction. The driving gear 33 of the drive motor 32 drives the driven gear 31 to rotate through gear meshing. A spiral fit is formed between the driven gear 31 and the threaded column 4. The threaded column 4 descends axially. The descent of the threaded column 4 drives the maintenance platform 5 to descend synchronously until it descends to a height that the staff can climb safely. The motor 32 reverses to make the platform rise to a suitable position.

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

[0071] S3: Auxiliary positioning and adjustment. The extension assembly 7 arranged at the bottom of the maintenance platform 5 includes a mounting ring 71 and an auxiliary ring 73. The driving gear 84 meshing with the inner wall of the mounting ring 71 is rotated by the drive of the motor 83, thereby driving the auxiliary ring 73 to rotate. The rotation of the auxiliary ring 73 drives the mounting 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 to achieve all-round maintenance.

[0072] S4: Maintenance work, according to needs, by operating the control motor 2 83, the extension component 7 is rotated and adjusted on the maintenance platform 5, positioned to the specific maintenance position of the inner wall of the boiler, and the control motor is started to make all the control shafts 75 rotate synchronously, and the extension plate 72 is driven to extend from the maintenance platform 5 to the inner wall of the boiler through the pulley 79 and the transmission belt 70. The staff stands on the platform or the extension plate 72, and inspects and repairs the inner wall of the boiler through the extension plate 72 to ensure comprehensive maintenance of the inner wall of the boiler.

[0073] It is obvious 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0074] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A boiler maintenance device for a thermal power plant, comprising two column frames (1), two symmetrically distributed beam rails (2) are connected between the two column frames (1), characterized in that: An inspection slide plate (3) is slidably provided on the two crossbeam rails (2), a threaded column (4) is slidably provided in the inspection slide plate (3), and an inspection platform (5) is connected to the bottom of the threaded column (4); An auxiliary positioning ring (6) is provided below the maintenance slide (3), and two electric telescopic rods (61) are symmetrically passed through the maintenance slide (3), and the telescopic ends of the electric telescopic rods (61) are connected to the auxiliary positioning ring (6). A plurality of extension rods (63) for slidingly passing through the maintenance slide (3) are circumferentially provided at the upper end of the auxiliary positioning ring (6), and 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 longitudinally slidably provided in the U-shaped groove of the extension rod (63), and 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).

2. A boiler maintenance device for a thermal power plant according to claim 1, characterized in that: The maintenance slide plate (3) is provided with two symmetrically distributed I-shaped blocks (34), the I-shaped blocks (34) are slidably arranged in the crossbeam track (2), and a guide slide rod (35) is arranged in the crossbeam track (2), and a through hole for the guide slide rod (35) to slide through is opened in the I-shaped block (34), one of the guide slide rods (35) is set as a threaded rod, and the threaded rod is threadedly connected to the I-shaped block (34), and a driving motor connected to the threaded rod is installed on one of the column frames (1).

3. A boiler maintenance device for a thermal power plant according to claim 1, characterized in that: The inner diameter of the auxiliary positioning ring (6) is larger than the outer diameter of the maintenance platform (5), so as to ensure that the maintenance platform (5) can smoothly pass 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) and the upper port of the boiler.

4. A boiler maintenance device for a thermal power plant according to claim 1, characterized in that: A driven gear (31) is rotatably provided on the maintenance slide plate (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 plate (3). A driving gear (33) is provided after the driving end of the motor (32) rotatably passes through the maintenance slide plate (3), and the driving gear (33) is meshed with the driven gear (31).

5. The boiler maintenance device for a thermal power plant 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 limit strips (66), and one end of the limit strip (66) away from the auxiliary positioning ring (6) is slidably arranged in the strip-shaped sliding groove (41).

6. A boiler maintenance device for a thermal power plant according to claim 1, characterized in that: An extension assembly (7) is provided at the bottom of the inspection platform (5), and the extension assembly (7) includes a mounting ring (71), the mounting ring (71) is rotatably provided at the bottom of the inspection platform (5), and is located on the same axis as the inspection platform (5), a plurality of extension openings are evenly provided on the side wall of the mounting ring (71) in the circumferential direction, and an extension plate (72) is slidably provided in the extension opening; An auxiliary ring (73) is rotatably provided at the bottom of the inspection platform (5). The auxiliary ring (73) is located inside the mounting ring (71) and is coaxially arranged with the mounting ring (71). The side wall of the auxiliary ring (73) is provided with an auxiliary opening for the extension plate (72) to pass through.

7. A boiler maintenance device for a thermal power plant according to claim 6, characterized in that: The bottom of the mounting ring (71) and the auxiliary ring (73) is provided with a connecting sub-plate (74), a control shaft (75) is rotatably provided on the connecting sub-plate (74) and at a position corresponding to the extension plate (72), a control gear (76) is installed on the control shaft (75), and a control rack (77) is arranged at the bottom of the extension plate (72) along the radial direction of the mounting ring (71), and the control rack (77) is meshed with the corresponding control gear (76).

8. A boiler maintenance device for a thermal power plant according to claim 6, characterized in that: A connecting track (78) is provided between the mounting ring (71) and the auxiliary ring (73), and a control rack (77) is slidably arranged on the connecting track (78).

9. A boiler maintenance device for a thermal power plant according to claim 6, characterized in that: An inner gear ring (81) is arranged on the inner side wall of the auxiliary ring (73), and a mounting bracket (82) is arranged at the central bottom of the maintenance platform (5). A second motor (83) is mounted on the mounting bracket (82), and a driving gear (84) meshing with the inner gear ring (81) is mounted on the output end of the second motor (83).

10. A method for overhauling a boiler in a thermal power plant, comprising the device for overhauling a boiler in a thermal power plant as claimed in any one of claims 1 to 9, characterized in that: The maintenance method includes the following steps: S1: The platform descends, the motor 1 (32) rotates forward, and through the meshing of the driving gear (33) and the driven gear (31) and the rotation of the driven gear (31) and the threaded column (4), the maintenance platform (5) descends to a height that the staff can climb safely, and then the motor 1 (32) rotates reversely to raise the maintenance platform (5); S2: The platform is positioned, the drive motor is started, the threaded rod is driven to rotate, and the I-shaped block (34) and the inspection slide plate (3) are driven to move along the crossbeam track (2) to the top of the boiler; S3: auxiliary positioning and adjustment, the second motor (83) drives the driving gear (84) to rotate, driving the extension component (7) to rotate, covering any position of the inner wall of the boiler; S4: Maintenance operation: after the extension assembly (7) is positioned at a specific position on the inner wall of the boiler, the extension plate (72) is driven to extend so that the staff can inspect the inner wall of the boiler.

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