A lifting type maintenance platform for a thermal power boiler

Abstract

The application provides a lifting type maintenance platform for a thermal power boiler, which comprises a walking assembly and a working platform. The walking assembly comprises a chassis and a power mechanism. Two groups of sliding sleeves are arranged on the lower end surface of the chassis and are parallel to each other. Each group of sliding sleeves is arranged on a group of boiler pipes. A plurality of rollers are arranged in each group of sliding sleeves and are in rolling contact with the upper surface of the boiler pipes. The power mechanism is arranged between the chassis and the boiler pipes to drive the walking assembly to move on the boiler pipes in a first direction. The working platform is supported on the chassis by a scissor mechanism to drive the lifting of the working platform. In use, the walking assembly is hoisted onto the boiler pipes so that the rollers in the sliding sleeves on the lower end of the chassis are in rolling contact with the boiler pipes. During the movement of the walking assembly, workers do not need to leave the working platform, and safety accidents caused by the skidding of the boiler pipes are avoided. Meanwhile, the working platform on the walking assembly is lifted by the scissor mechanism, which facilitates the workers to clean the water-cooled wall pipes on the radiant section of the boiler furnace.

Description

Technical Field

[0001] This invention relates to the field of thermal power generation, and more specifically, to a lifting maintenance platform for thermal power boilers. Background Technology

[0002] During thermal power generation, a large amount of ash and slag easily accumulates on the water-cooled wall tubes of the boiler furnace. Due to prolonged high temperatures, the ash and slag clump together, which can easily affect the working efficiency of the water-cooled wall tubes and requires regular cleaning. Currently, the furnace cleaning of thermal power boilers is mainly done manually. Because the top of the radiant section of the furnace is high, it is impossible to directly clean and scrub the ash and slag. It is necessary to stand on a wooden board placed on the furnace tube and use a long-handled cleaning tool to carry out the cleaning work. Usually, after the workers set up the wooden board on the furnace tube, they need to move the board continuously to move forward during the cleaning work. When moving the board, the workers can only stand on the furnace tube. Although the gap between the furnace tubes is not large enough to pose a risk of workers falling, the furnace tubes are easy to slip on when wet, which also poses a significant safety hazard. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lifting maintenance platform for thermal power boilers.

[0004] The embodiments of the present invention are achieved through the following technical solutions:

[0005] A lifting maintenance platform for a thermal power boiler includes:

[0006] A traveling assembly includes a chassis and a power mechanism. The lower end face of the chassis is provided with two sets of parallel sliding sleeves. Each set of sliding sleeves is fitted onto a set of furnace tubes, and each set of sliding sleeves contains several rollers for rolling contact with the upper surface of the furnace tubes. The power mechanism is connected between the chassis and the furnace tubes, and is used to drive the traveling assembly to move along a first direction on the furnace tubes.

[0007] The work platform is supported on the chassis by a scissor mechanism to drive the lifting and lowering of the work platform.

[0008] Furthermore, two sets of scissor lift mechanisms are arranged opposite each other on the chassis, and each end of the working platform is supported on one set of scissor lift mechanisms; a double-headed hydraulic cylinder is provided on the chassis between the two sets of scissor lift mechanisms, and each of the two output ends of the double-headed hydraulic cylinder is drivenly connected to one set of scissor lift mechanisms.

[0009] Furthermore, the power mechanism includes a power source and a clamping mechanism. The clamping mechanism is slidably mounted on the chassis along the moving direction of the walking assembly. Two sets of arc-shaped clamping plates are slidably mounted on the clamping mechanism on both sides of the furnace tube. The sliding trajectories of the two sets of clamping plates form a V-shaped opening facing a first direction. The clamping mechanism is provided with a first elastic element for pushing the two sets of clamping plates to unfold. When the two sets of clamping plates slide along a second direction opposite to the first direction, the two sets of clamping plates converge to clamp the furnace tube.

[0010] The power source is fixed on the chassis and located in the second direction of the two sets of half clamps, so that after the power source pulls the two sets of half clamps to gather and clamp the furnace tube, the chassis is pulled to slide in the first direction by the tension between the power source and the two sets of half clamps.

[0011] Furthermore, each output end of the dual-head hydraulic cylinder includes a first pipe section and a second pipe section telescopically connected to the first pipe section, the second pipe section being drivenly connected to the scissor mechanism; a set of levers is provided on the first pipe section of the dual-head hydraulic cylinder near the first direction side; a set of pull rods is hinged to each of the two sets of half-clamps, and a set of connecting seats is provided at the other end of the two sets of pull rods, the levers being hooked onto the connecting seats; the dual-head hydraulic cylinder has a relative first telescopic stroke and a second telescopic stroke, during the first telescopic stroke, the dual-head hydraulic cylinder drives the first pipe section to move, and the first pipe section and the second pipe section slide in contact; during the second telescopic stroke, the dual-head hydraulic cylinder drives the first pipe section to move and press against the second pipe section, thereby pushing the scissor mechanism to rise and fall; a second elastic element connected to the clamping mechanism is provided on the chassis, thereby driving the clamping mechanism to move in the first direction;

[0012] When the dual-head hydraulic cylinder is in its first stroke, the first pipe section moves in the second direction to drag the two sets of half-clamps to hold the furnace tube and drive the chassis to slide in the first direction; when the first pipe section moves in the first direction, the second elastic element drives the clamping mechanism to slide and reset in the first direction.

[0013] Furthermore, the second pipe section of the double-headed hydraulic cylinder near the first direction is also connected to a set of horizontally arranged crossbars;

[0014] Both sets of the half-clamps are slidably mounted in the clamping mechanism via a third elastic element. Each set of half-clamps is also provided with a set of clamping plates and a set of wedge plates at its upper end, with the wedge-shaped surface of the wedge plates facing the second direction. The crossbar is also provided with two sets of pressure bars. When the double-headed hydraulic cylinder drives the second pipe section to push the scissor mechanism to rise, each of the two sets of pressure bars makes transition contact with the wedge-shaped surface of one set of wedge plates and presses down on the wedge plates so that the two sets of clamping plates clamp the furnace tube.

[0015] Furthermore, the clamping mechanism includes a bracket that can be slidably disposed on the chassis along a first direction, and each set of half clamps is slidably disposed on a set of sliders; the sliders are slidably disposed on the bracket and supported by the third elastic element.

[0016] Furthermore, the lower end of the walking chassis is provided with support legs to support the chassis on the ground; when the chassis is mounted on the furnace tubes, the support legs are suspended in the gaps between the furnace tubes.

[0017] Furthermore, a set of hoppers is provided on each of the two side walls of the chassis located between the two ends of the walking assembly. The hoppers are used to collect ash and slag removed from the water-cooled wall tubes.

[0018] Furthermore, the lower end face of the hopper is provided with a material leakage port, and a material leakage cylinder made of canvas is provided over the material leakage port, which extends vertically to the bottom of the water-cooled wall.

[0019] Furthermore, in each group of scissor arms, the two groups of scissor arms are connected to each other in a cross manner. Each group of scissor arms is defined to have a first end and a second end, wherein the first end of each group of scissor arms is close to the opposite side of the scissor arm.

[0020] In each scissor lift mechanism, the first end of the first scissor lift arm is slidably connected to the working platform, and the sliding direction is the moving direction of the traveling assembly; the second end of the first scissor lift arm is hinged to the chassis. The first end of the second scissor lift arm is slidably connected to the chassis, and the sliding direction is the moving direction of the traveling assembly; the second end of the second scissor lift arm is hinged to the working platform. Both output ends of the double-headed hydraulic cylinder are hinged to the scissor lift arm whose first end is slidably connected to the chassis, and the connection position is located at the first end of the scissor lift arm.

[0021] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0022] When in use, the maintenance platform of this invention is hoisted onto the furnace tube so that the rollers in the sliding sleeve at the lower end of the chassis make rolling contact with the furnace tube. The movement of the walking assembly is driven by the power mechanism. During the movement, the workers do not need to leave the work platform, avoiding safety accidents caused by the furnace tube slipping. At the same time, the work platform on the walking assembly is raised and lowered by the scissor mechanism, which makes it convenient for workers to clean the water-cooled wall tubes on the radiant section of the furnace. Attached Figure Description

[0023] Figure 1 This is a diagram illustrating the usage status of the lifting maintenance platform for thermal power boilers according to the present invention.

[0024] Figure 2 The three-dimensional lifting maintenance platform for thermal power boilers of the present invention Figure 1 ;

[0025] Figure 3 The three-dimensional lifting maintenance platform for thermal power boilers of the present invention Figure 2 ;

[0026] Figure 4 This is a schematic diagram showing the installation relationship between the two sets of scissor lift mechanisms and the chassis of the present invention;

[0027] Figure 5 The three-dimensional power mechanism of the present invention Figure 1 ;

[0028] Figure 6 The three-dimensional power mechanism of the present invention Figure 2 ;

[0029] Figure 7 for Figure 5 An enlarged view of part A;

[0030] Figure 8 for Figure 6 An enlarged view of part B;

[0031] Icons: 1-Cooling wall tube, 2-Furnace tube, 3-Traveling assembly, 30-Chassis, 31-Power mechanism, 310-Clamping mechanism, 311-Half clamp, 312-First elastic element, 313-Pull rod, 314-Vertical shaft, 315-Slider, 316-Third elastic element, 317-Clamping plate, 318-Wedge plate, 319-Bracket, 32-Sliding sleeve, 320-Roller, 33-Second elastic element, 34-Connecting seat, 4-Working platform, 5-Hopper, 6-Scissor mechanism, 60-Scissor arm, 7-Double-head hydraulic cylinder, 70-First pipe section, 700-Pulley block, 71-Second pipe section, 73-Horizontal bar, 730-Pressure bar, 8-Outrigger. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Reference Figures 1 to 8 The present invention discloses a lifting maintenance platform for thermal power boilers, including a traveling assembly 3 and a working platform 4.

[0034] The running gear 3 includes a chassis 30 and a power mechanism 31, as shown in the reference. Figure 3 The lower end face of the chassis 30 is provided with two sets of parallel sliding sleeves 32. Each set of sliding sleeves 32 is fitted onto a set of furnace tubes 2. Each set of sliding sleeves 32 is provided with several rollers 320. The rollers 320 roll in contact with the upper surface of the furnace tube 2. The sliding sleeves 32 are U-shaped with the opening facing downwards. When fitted onto the furnace tube 2, they can provide guidance for the movement of the chassis 30 and prevent it from tipping over. The rolling contact between the rollers 320 and the furnace tube 2 allows the chassis 30 to move on the furnace tube 2 with a small thrust. The traveling assembly 3 is provided with lifting lugs, which can be used to lower it onto the furnace tube 2 using lifting equipment.

[0035] The power mechanism 31 is used to drive the chassis 30 to move along the first direction (i.e. the construction direction of ash and slag cleaning). The power mechanism 31 is connected between the chassis 30 and the furnace tube 2. It is easy to understand that the working platform 4 is supported on the chassis 30 by the scissor mechanism 6 to drive the lifting and lowering of the working platform 4.

[0036] Next, the lifting principle of work platform 4 will be explained in detail.

[0037] In this embodiment, the work platform 4 is supported by a double scissor mechanism 6, as shown in the reference. Figure 4 Two sets of scissor lift mechanisms 6 are arranged opposite each other on the left and right sides of the chassis 30. Each end of the working platform 4 is supported on one set of scissor lift mechanisms 6. A double-headed hydraulic cylinder 7 is located on the chassis 30 between the two sets of scissor lift mechanisms 6. Each of the two output ends of the double-headed hydraulic cylinder 7 faces one set of scissor lift mechanisms 6, and each output end of the double-headed hydraulic cylinder 7 is driven and connected to one set of scissor lift mechanisms 6. Specifically:

[0038] Reference Figure 4 In the two sets of scissor lift mechanisms 6, the two sets of scissor arms 60 in each set of scissor lift mechanisms 6 are connected to each other in a cross manner. Each set of scissor arms 60 is defined to have a first end and a second end. The first end of each set of scissor arms 60 is close to the opposite side of the scissor lift mechanism 6, and the second end is located on the side away from the opposite side of the scissor lift mechanism 6. That is, in the two sets of scissor lift mechanisms 6, the first ends of the four sets of scissor arms 60 are closest to each other.

[0039] Reference Figure 4 Taking the scissor lift mechanism 6 on the left as an example, in each scissor lift mechanism 6, the first end of the first scissor lift arm 60 is slidably connected to the upper working platform 4, and the sliding direction is the moving direction of the traveling assembly 3 (i.e., the first direction and the second direction opposite to the first direction). The second end of the first scissor lift arm 60 is hinged to the lower chassis 30. The first end of the second scissor lift arm 60 is slidably connected to the lower chassis 30, and the sliding direction is the moving direction of the traveling assembly 3. The second end of the second scissor lift arm 60 is hinged to the upper working platform 4. Both output ends of the double-headed hydraulic cylinder 7 are hinged to the scissor lift arm 60 whose first end is slidably connected to the chassis 30, and the connection position is located at the first end of the scissor lift arm 60. With the above settings, one set of double-headed hydraulic cylinders 7 can drive the synchronous lifting and lowering of the two sets of scissor lift mechanisms 6.

[0040] Next, the specific movement method of the walking assembly 3 and the working principle of the power mechanism 31 will be described in detail.

[0041] Reference Figure 3 The power mechanism 31 includes a power source and a clamping mechanism 310. The clamping mechanism 310 is slidably mounted on the chassis 30 along the moving direction of the walking assembly 3.

[0042] Reference Figures 5 to 8 The clamping mechanism 310 includes two sets of brackets 319, which are slidably mounted on the lower end of the chassis 30 along a first direction and a second direction, and the two sets of brackets 319 are located on both sides of the furnace tube 2 in the middle; see reference. Figure 3 Each bracket 319 is connected to the chassis 30 via a second elastic element 33 (a tension spring in this embodiment). Under the action of the tension spring 30, the two brackets 319 can be subjected to the tension force of the tension spring 30 in the first direction.

[0043] Reference Figure 5 and Figure 6 Each bracket 319 has a set of sliders 315 that can slide up and down. The lower end of the slider 315 is supported by a third elastic element 316 (compression spring in this embodiment). The slider 315 can slide up and down within the guide frame on the bracket 319. Each set of sliders 316 has a set of horizontal elongated holes, and a set of first elastic elements 312 (compression spring in this embodiment) is provided in the elongated holes. Each set of sliders 316 also has a set of vertical shafts 314 that can slide up and down, and a set of half-clamping pieces 311 are provided on the vertical shafts 314.

[0044] Through the aforementioned structural arrangement, the two sets of arc-shaped clamping plates 311 located on both sides of the furnace tube 2 can be slidably mounted vertically and horizontally on the bracket 319, as shown in the reference. Figure 6 and Figure 8Due to the guiding effect of the elongated hole on the slider 315, the sliding trajectory of the two sets of half-clamping plates 311 forms a V-shaped opening facing the first direction. That is, when the two sets of half-clamping plates 311 are pushed along the first direction, the distance between the two sets of first clamping plates 311 increases and they unfold. When the two sets of half-clamping plates 311 are pushed in the second direction, the two sets of half-clamping plates 311 come together and can clamp the furnace tube 2. The function of the first elastic element 312 is to push the distance between the two sets of half-clamping plates 311 to increase.

[0045] The power source is fixed on the chassis 30 and located in the second direction of the two sets of clamping plates 311. When the power source pulls the two sets of clamping plates 311 in the second direction, the two sets of clamping plates 311 converge and lock the furnace tube 2. Then, under the continued pulling of the power source, with the clamping position of the two sets of clamping plates 311 on the furnace tube 2 as the traction point, the pulling force of the power source on the two sets of clamping plates 311 is converted into the traction force on the chassis 30, so that the chassis 30 moves in the first direction.

[0046] The power source can be a pneumatic cylinder or a hydraulic cylinder. The output shaft of the power source is movably connected to two sets of half-clamps 311. During the retraction of the output shaft of the pneumatic / hydraulic cylinder, a traction action is generated on the chassis 30.

[0047] In one embodiment, the double-headed hydraulic cylinder 7 that drives the lifting and lowering of the two sets of scissor lift mechanisms 6 is used as the power source to drive the movement of the walking assembly 3, and its specific configuration is as follows:

[0048] Each output end of the double-headed hydraulic cylinder 7 is provided with a first tube section 70 and a second tube section 71 that is telescopically connected to the first tube section 70. The second tube section 71 is driven and connected to the scissor mechanism 6.

[0049] Reference Figures 5 to 8 The first pipe section 70 of the double-headed hydraulic cylinder 7 near the first direction is provided with a set of levers 700; each of the two sets of half-clamps 311 is hinged with a set of pull rods 313, and the other end of the two sets of pull rods 313 is provided with a set of connecting seats 34. The connecting seats 34 can be reciprocated and slidably embedded in the lower end of the chassis 30 along the first direction, and the levers 700 can be hooked on the connecting seats 34; wherein, the double-headed hydraulic cylinder 7 has a relative first extension stroke and a second extension stroke, and the extension amount of the first extension stroke is much smaller than the extension amount of the second extension stroke.

[0050] During the first extension stroke, the double-headed hydraulic cylinder 7 drives the first pipe section 70 to move. At this time, there is still a retraction margin between the second pipe section 70 and the first pipe section, meaning that the extension and retraction of the second pipe section 70 by the double-headed hydraulic cylinder 7 will not drive the movement of the second pipe section 71. At this time, the first pipe section 70 and the second pipe section 71 are in sliding contact. When the double-headed hydraulic cylinder 7 is in the first stroke, when the first pipe section 70 moves in the first direction, the lever 700 will not drive the movement of the connecting seat 34. When the first pipe section 70 moves in the second direction, the lever 700 is engaged in the connecting groove on the connecting seat 34. The lever 700 drags the two sets of half-clamps 311, along with the bracket 319 and the slider 315 located on the bracket 319, towards the second direction. As the direction moves, under the guidance of the elongated hole in the slider 315, the two sets of clamping plates 311 quickly converge to clamp the furnace tube 2. Then, the subsequent dragging action of the first tube section 70 causes the double-headed hydraulic cylinder 7 to move towards the two sets of clamping plates 311, forming a traction on the travel assembly 3 to move in the first direction. When the double-headed hydraulic cylinder 7 drives the first tube section 70 to move in the first direction, under the traction of the second elastic element 33, the entire clamping mechanism 310 moves and resets in the first direction. At this time, the first elastic element 312 in the slider 315 pushes the two sets of clamping plates 311 to unfold. Therefore, when the double-headed hydraulic cylinder 7 drives the first tube section 70 to move in the first direction, the two sets of clamping plates 311 form an obstruction.

[0051] During the first extension stroke, the extension force of the double-headed hydraulic cylinder 7 is not transmitted to the second pipe section 71. Therefore, the working platform 4 is not lifted by the two sets of scissor mechanisms 6, so that the working platform 4 is always in a low position during the movement of the traveling assembly 3, which is safer.

[0052] During the second extension stroke, when the double-headed hydraulic cylinder 7 drives the first pipe section 70 to move continuously in the first direction and makes the first pipe section 70 press against the second pipe section 71, the output force of the double-headed hydraulic cylinder 7 is converted into a driving force for the scissor mechanism 6, so that the working platform 4 changes from a low position state to a high position working state.

[0053] Furthermore, in one embodiment, to enhance safety when the work platform 4 transitions from a low-position to a high-position work state, i.e., the walking assembly 3 can be locked to prevent movement, refer to... Figures 5 to 8 The second pipe section 71 of the double-headed hydraulic cylinder 7, which is close to the first direction, is also connected to a set of horizontally arranged crossbars 73 (the crossbars 73 are the connecting crossbeams on the scissor arms 60). Each set of half-clamps 311 is also provided with a set of clamping plates 317 and a set of wedge plates 318 at its upper end, and the wedge surface of the wedge plate 318 faces the second direction. The crossbars 73 are also provided with two sets of pressure strips 730, and each of the two sets of pressure strips 730 points to a set of wedge surfaces.

[0054] When the double-headed hydraulic cylinder 7 drives the second pipe section 71 to push the scissor mechanism 6 to rise, the two sets of pressure bars 730 each make transition contact with the wedge-shaped surface of a set of wedge plates 318 and press down the wedge plates 318. At this time, since the integrated structure composed of the clamping plate 317, the wedge plate 318 and the half clamping piece 311 is sleeved on the vertical shaft 314, and the upper end of the vertical shaft 314 can be reciprocated along the first direction and embedded on the lower end surface of the chassis 30, the action of the clamping plate 317, the wedge plate 318 and the half clamping piece 311 being squeezed by the pressure bar 730 and moving down as a whole will not have a downward pressing effect on the vertical shaft 314. Therefore, the pull rod 313 can be hinged to the vertical shaft 314.

[0055] Under the pressure of the pressure bar 730, the two sets of clamping plates 317 clamp the furnace tube 2 to form a lock. As the working platform 4 is lowered to the low position, the half clamping plate 311 automatically moves up to both sides of the furnace tube 2 under the lifting of the third elastic element 316.

[0056] Furthermore, in this embodiment, the lower end of the traveling chassis 30 is provided with outriggers 8, which can support the maintenance platform 8 on the ground when it is hoisted out of the furnace; see reference. Figure 3 When the chassis 30 is mounted on the furnace tube 2, the support legs 8 are suspended in the gap between the furnace tubes 2.

[0057] In addition, in one embodiment, in order to reduce the damage to the bottom cooling enclosure 1 caused by ash clumping and falling, a set of hoppers 5 is provided on each of the two side walls of the chassis 30 located between the two ends of the walking assembly 3. The hoppers 5 can be used to collect the ash removed from the water-cooled wall tubes.

[0058] In one embodiment, the lower end face of the hopper 5 may also be provided with a material leakage port, and a material leakage cylinder made of canvas is provided on the material leakage port. The material leakage cylinder extends vertically to the bottom of the water-cooled wall to buffer the falling of agglomerated ash.

[0059] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A lifting maintenance platform for a thermal power boiler, characterized in that, include: The walking assembly (3) includes a chassis (30) and a power mechanism (31). The lower end face of the chassis (30) is provided with two sets of parallel sliding sleeves (32). Each set of sliding sleeves (32) is fitted onto a set of furnace tubes (2). Each set of sliding sleeves (32) is provided with several rollers (320) to roll in contact with the upper surface of the furnace tubes (2). The power mechanism (31) is connected between the chassis (30) and the furnace tubes (2) and is used to drive the walking assembly (3) to move along a first direction on the furnace tubes (2). as well as The work platform (4) is supported on the chassis (30) by a scissor mechanism (6) to drive the lifting and lowering of the work platform (4); Two sets of scissor lift mechanisms (6) are arranged opposite to each other on the chassis (30), and the two ends of the working platform (4) are each supported on a set of scissor lift mechanisms (6); a double-headed hydraulic cylinder (7) is provided on the chassis (30) between the two sets of scissor lift mechanisms (6), and the two output ends of the double-headed hydraulic cylinder (7) are each driven and connected to a set of scissor lift mechanisms (6); The power mechanism (31) includes a power source and a clamping mechanism (310). The clamping mechanism (310) is slidably mounted on the chassis (30) along the moving direction of the walking assembly (3). The clamping mechanism (310) is slidably provided with two sets of arc-shaped half-clamps (311) located on both sides of the furnace tube (2). The sliding trajectory of the two sets of half-clamps (311) forms a V-shaped opening facing the first direction. The clamping mechanism (310) is provided with a first elastic element (312) for pushing the two sets of half-clamps (311) to unfold. When the two sets of half-clamps (311) slide along a second direction opposite to the first direction, the two sets of half-clamps (311) converge to clamp the furnace tube (2). The power source is fixed on the chassis (30) and located in the second direction of the two sets of clamping plates (311). After the power source pulls the two sets of clamping plates (311) to gather and clamp the furnace tube (2), the chassis (30) is pulled to slide in the first direction by the tension between the power source and the two sets of clamping plates (311).

2. The lifting maintenance platform for thermal power boilers according to claim 1, characterized in that, Each output end of the double-headed hydraulic cylinder (7) includes a first pipe section (70) and a second pipe section (71) telescopically connected to the first pipe section (70). The second pipe section (71) is drivenly connected to the scissor mechanism (6). A set of levers (700) is provided on the first pipe section (70) near the first direction side of the double-headed hydraulic cylinder (7). A set of pull rods (313) is hinged to each of the two sets of half-clamps (311). A set of connecting seats (34) is provided at the other end of the two sets of pull rods (313). The levers (700) are hooked on the connecting seats (34). The pressure cylinder (7) has a first extension stroke and a second extension stroke. During the first extension stroke, the double-headed hydraulic cylinder (7) drives the first pipe section (70) to move, and the first pipe section (70) and the second pipe section (71) slide in contact. During the second extension stroke, the double-headed hydraulic cylinder (7) drives the first pipe section (70) to move and press against the second pipe section (71) to push the scissor mechanism (6) to rise and fall. The chassis (30) is provided with a second elastic element (33) connected to the clamping mechanism (310) to drive the clamping mechanism (310) to move in the first direction. When the double-headed hydraulic cylinder (7) is in the first stroke, the first pipe section (70) moves in the second direction to drag the two sets of half clamps (311) to clamp the furnace tube (2) and drive the chassis (30) to slide in the first direction; when the first pipe section (70) moves in the first direction, the second elastic element (33) drives the clamping mechanism (310) to slide and reset in the first direction.

3. The lifting maintenance platform for thermal power boilers according to claim 2, characterized in that, The second pipe section (71) of the double-headed hydraulic cylinder (7) near the first direction side is also connected to a set of horizontally arranged crossbars (73); Both sets of the half clamps (311) are slidably disposed in the clamping mechanism (310) via a third elastic element (316). Each set of half clamps (311) is also provided with a set of clamping plates (317) and a set of wedge plates (318) at its upper end, and the wedge surface of the wedge plate (318) faces the second direction. The crossbar (73) is also provided with two sets of pressure strips (730). When the double-headed hydraulic cylinder (7) drives the second pipe section (71) to push the scissor mechanism (6) to rise, each of the two sets of pressure strips (730) makes transition contact with the wedge surface of a set of wedge plates (318) and presses down the wedge plates (318) so that the two sets of clamping plates (317) clamp the furnace tube (2).

4. The lifting maintenance platform for thermal power boilers according to claim 3, characterized in that, The clamping mechanism (310) includes a bracket (319) slidably disposed on the chassis (30) in a first direction, and each set of half clamps (311) is slidably disposed on a set of sliders (315); the sliders (315) are slidably disposed on the bracket (319) and supported by the third elastic member (316).

5. The lifting maintenance platform for thermal power boilers according to any one of claims 1 to 4, characterized in that, The chassis (30) is provided with a support leg (8) at its lower end to support the chassis (30) on the ground; when the chassis (30) is mounted on the furnace tube (2), the support leg (8) is suspended in the gap between the furnace tubes (2).

6. The lifting maintenance platform for thermal power boilers according to any one of claims 1 to 4, characterized in that, A set of hoppers (5) is provided on each side wall of the chassis (30) located between the two ends of the walking assembly (3). The hoppers (5) are used to collect ash and slag removed from the water-cooled wall tubes.

7. The lifting maintenance platform for thermal power boilers according to claim 6, characterized in that, The hopper (5) has a material leakage port on its lower end face, and a material leakage cylinder made of canvas is covered on the material leakage port. The material leakage cylinder extends vertically to the bottom of the water-cooled wall.

8. The lifting maintenance platform for thermal power boilers according to claim 1, characterized in that, The two sets of scissor arms (60) in each set of scissor mechanisms (6) are connected to each other in a cross manner. Each set of scissor arms (60) is defined to have a first end and a second end opposite to each other. The first end of each set of scissor arms (60) is close to the opposite side of the scissor mechanism (6). In each scissor lift mechanism (6), the first end of the first scissor lift arm (60) is slidably connected to the working platform (4), and the sliding direction is the moving direction of the walking assembly (3). The second end of the first scissor lift arm (60) is hinged to the chassis (30). The first end of the second scissor lift arm (60) is slidably connected to the chassis (30), and the sliding direction is the moving direction of the walking assembly (3). The second end of the second scissor lift arm (60) is hinged to the working platform (4). Both output ends of the double-headed hydraulic cylinder (7) are hinged to the scissor lift arm (60) whose first end is slidably connected to the chassis (30), and the connection position is located at the first end of the scissor lift arm (60).

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