Boiler maintenance platform

By adopting the traction structure, guidance structure and maintenance structure on the boiler maintenance platform, the problems of wire rope wear and winding are solved, and the stable use and extended life of wire rope are achieved.

CN119389994APending Publication Date: 2025-02-07JURONG GENERATE ELECTRICITY PLANT HUADIAN JIANGSU ENERGY CO LTD
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Patent Information

Application Number
CN202411809769.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-10
Publication Date
2025-02-07

AI Technical Summary

Technical Problem

In the existing boiler maintenance platform, the wire rope is easily worn during long-term use, resulting in a decrease in strength and durability, and is easily entangled and knotted with each other during movement or adjustment, shortening service life and increasing the cost of repair and replacement. .

Method used

A boiler maintenance platform was designed, using a traction structure and a guide structure to maintain the stable path and tension of the wire rope through the guide wheel and guide roller to avoid winding and knotting, and at the same time, the service life of the wire rope is extended by uniformly spraying grease in the maintenance structure. .

Benefits of technology

It effectively avoids the winding and knotting of the wire rope during use, extends its service life, improves the safety of use, and reduces the cost of repair and replacement.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a boiler maintenance platform, and relates to the technical field of maintenance platforms, the platform comprises a fixed seat, supports are symmetrically fixed on the left and right sides of the lower end of the fixed seat, a traction box is mounted at the upper end of the fixed seat, an adjusting groove and two auxiliary ports are formed in the upper end of the fixed seat, and an adjusting structure is arranged in the adjusting groove; a plurality of penetrating openings are formed in the bottom in the traction box, two guide wheels are rotationally installed in each penetrating opening, a plurality of steel wire ropes and a traction structure for winding the steel wire ropes are arranged in the traction box, the steel wire ropes sequentially penetrate out of the penetrating openings and the auxiliary openings to jointly hoist the overhaul stand, and the outer walls of the two guide wheels are attached to the outer walls of the steel wire ropes. Through cooperation of the traction structure and the guide structure, winding and releasing of the steel wire ropes are achieved, then the height position of the overhaul stand is adjusted, the guide structure enables the steel wire ropes to keep stable paths and tension in the moving process, and therefore the steel wire ropes are prevented from being wound and knotted.
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Description

Technical Field

[0001] The invention relates to the technical field of maintenance platforms, in particular to a boiler maintenance platform. Background Art

[0002] The space in the boiler where fuel combustion is organized, also called the combustion chamber, is an important part of the boiler's combustion equipment. Currently, furnace maintenance is generally done by maintenance personnel standing on a maintenance platform, and then using wire ropes to lift the lifting platform to transport the maintenance personnel to the required height for easy maintenance.

[0003] As the main load-bearing and transmission component of the maintenance platform, the performance of the wire rope is directly related to the reliability and safety of the entire platform. However, during long-term use, the wire rope is easily affected by factors such as wear, resulting in a decrease in its strength and durability. In particular, when the wire rope is entangled or knotted during movement or adjustment, it will further increase its wear and damage, shorten its service life, and increase the cost of maintenance and replacement.

[0004] Based on this, a boiler maintenance platform is now provided, which can eliminate the disadvantages of the existing platform. Summary of the invention

[0005] The object of the present invention is to provide a boiler maintenance platform to solve the problem in the background technology that the steel wire rope is easily affected by factors such as wear, resulting in a decrease in its strength and durability.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A boiler maintenance platform, comprising a fixed seat, brackets are symmetrically fixed on the left and right sides of the lower end of the fixed seat, a traction box is installed on the upper end of the fixed seat, an adjustment slot and two auxiliary ports are opened on the upper end of the fixed seat, an adjustment structure is arranged inside the adjustment slot, a plurality of through-ports are opened at the bottom of the traction box, two guide wheels are rotatably installed inside each of the through-ports, a plurality of steel wire ropes and a traction structure for winding the steel wire ropes are arranged inside the traction box, a plurality of the steel wire ropes pass through the through-ports and the auxiliary ports in turn to jointly hoist the maintenance platform, and the outer walls of the two guide wheels are in contact with the outer walls of the steel wire ropes;

[0008] The adjustment structure includes an adjustment motor pressed on one end of a fixed seat and an adjustment screw rotatably installed inside an adjustment groove. The output end of the adjustment motor extends to the inside of the adjustment groove and is fixedly connected to the adjustment screw. An adjustment block is slidably arranged inside the adjustment groove. The adjustment screw is threadably connected to the adjustment block. The adjustment block is fixed to the lower end of a traction box. A plurality of auxiliary blocks are fixed to the lower end of the traction box. The outer wall of the auxiliary block is slidably connected to the inner wall of the auxiliary port.

[0009] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0010] Preferably, the traction structure includes a worm gear rotatably installed inside the traction box, with driving wheels fixed at both ends of the worm wheel, a winding roller fixed at the other end of the driving wheel, a steel wire rope wound around the winding roller, the driving wheel is connected to the guide structure through a transmission belt, and the worm gear is meshed and connected to the driving structure.

[0011] Preferably, the guiding structure includes a driven wheel rotatably mounted inside the traction box, the driven wheel being connected to the driving wheel through a transmission belt, a reciprocating screw being fixed at one end of the driven wheel, the reciprocating screw being threadedly connected to a reciprocating block, the reciprocating block being slidably connected to a fixed rod, the fixed rod being fixed inside the traction box, a guide groove being provided at one end of the reciprocating block close to the winding roller, guide frames being symmetrically fixed on both sides of the guide groove, a guide roller being rotatably mounted between the two guide frames, and the outer wall of the guide roller being in contact with the outer wall of the wire rope.

[0012] Preferably, the driving structure includes a driving motor installed on the outer wall of the traction box and a worm rotatably installed inside the traction box, the output end of the driving motor extends to the inside of the traction box and is fixedly connected to the worm, the worm is meshed with the worm wheel, and a maintenance structure is provided at the upper end of the traction box.

[0013] Preferably, the maintenance structure includes a fat supply box installed on the upper end of the traction box and a piston assembly connected to the end of the worm gear away from the driving motor, the fat supply box is connected to the fat pipe through a fat inlet pipe, a one-way inlet valve is provided at the connection between the fat inlet pipe and the fat pipe, the two sides of the fat pipe are connected to a connecting pipe through a fat outlet pipe, a one-way outlet valve is provided at the connection between the fat pipe and the fat outlet pipe, the connecting pipe is connected to an annular nozzle through a delivery pipe, the annular nozzle is arranged inside the traction box, and the annular nozzle surrounds the wire rope.

[0014] Preferably, the piston assembly includes a rotating disk fixed to the end of the worm gear away from the driving motor, the edge of the rotating disk is rotatably connected to the driving rod via connecting rod 1, the other end of the driving rod is rotatably connected to the piston rod via connecting rod 2, and a piston block is fixed to the other end of the piston rod, and the piston block is slidably installed inside the grease tube.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention realizes the winding and releasing of the wire rope by cooperating with the traction structure and the guide structure, thereby adjusting the height position of the maintenance platform, and the guide structure enables the wire rope to maintain a stable path and tension during the movement, thereby avoiding the entanglement and knotting of the wire ropes.

[0017] 2. The present invention cooperates with the two guide wheels inside the through-hole through the maintenance structure. When the piston assembly is running, the pressure generated pushes the grease to be evenly sprayed or applied on the wire rope through the annular nozzle. At the same time, the wire rope drives the guide wheel to rotate, and the guide wheel evenly distributes the grease on the surface of the wire rope, thereby extending the service life of the wire rope and increasing its safety in use.

[0018] 3. The present invention drives the adjusting screw to rotate by adjusting the motor, so that the adjusting block slides in the adjusting slot. The sliding of the adjusting block drives the traction box to move horizontally to adjust the horizontal position of the maintenance platform. At the same time, the auxiliary block slides in the auxiliary opening to ensure the smooth movement of the traction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the regulating structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the structure inside the traction box of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the driving structure and the traction structure of the present invention.

[0023] Figure 5 It is a structural schematic diagram of the guiding structure of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the maintenance structure of the present invention.

[0025] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at position A in the figure.

[0026] Figure 8 It is a structural schematic diagram of the piston assembly of the present invention.

[0027] Notes on the reference numerals: 1. Fixed seat; 11. Auxiliary opening; 12. Adjustment slot; 2. Bracket; 3. Adjustment structure; 301. Adjustment motor; 302. Adjustment screw; 303. Adjustment block; 304. Auxiliary block; 4. Traction box; 401. Through opening; 402. Guide wheel; 5. Driving structure; 501. Driving motor; 502. Worm; 6. Traction structure; 601. Worm wheel; 602. Driving wheel; 603. Winding roller; 604. Transmission belt; 7. Guide structure; 701. Driven wheel; 702. Reciprocating screw; 703. Fixed Rod; 704, reciprocating block; 705, guide groove; 706, guide frame; 707, guide roller; 8, maintenance structure; 801, grease supply box; 802, grease inlet pipe; 803, one-way inlet valve; 804, grease pipe; 805, one-way outlet valve; 806, grease outlet pipe; 807, connecting pipe; 808, delivery pipe; 809, annular nozzle; 81, piston assembly; 811, rotating disk; 812, connecting rod one; 813, driving rod; 814, connecting rod two; 815, piston rod; 816, piston block; 9, maintenance table; 10, wire rope. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] In one embodiment, Figure 1-Figure 8 As shown, a boiler maintenance platform comprises a fixed seat 1, brackets 2 are symmetrically fixed on the left and right sides of the lower end of the fixed seat 1, a traction box 4 is installed on the upper end of the fixed seat 1, an adjustment slot 12 and two auxiliary ports 11 are opened on the upper end of the fixed seat 1, an adjustment structure 3 is arranged inside the adjustment slot 12, a plurality of through-holes 401 are opened on the bottom of the traction box 4, two guide wheels 402 are rotatably installed inside each of the through-holes 401, a plurality of steel wire ropes 10 and a traction structure 6 for winding the steel wire ropes 10 are arranged inside the traction box 4, a plurality of the steel wire ropes 10 pass through the through-holes 401 and the auxiliary ports 11 in turn to hoist the maintenance platform 9 together, and the outer walls of the two guide wheels 402 are in contact with the outer walls of the steel wire ropes 10;

[0030] The adjustment structure 3 includes an adjustment motor 301 pressed on one end of the fixed seat 1 and an adjustment screw 302 rotatably installed inside the adjustment groove 12. The output end of the adjustment motor 301 extends to the inside of the adjustment groove 12 and is fixedly connected to the adjustment screw 302. An adjustment block 303 is slidably arranged inside the adjustment groove 12. The adjustment screw 302 is threadedly connected to the adjustment block 303. The adjustment block 303 is fixed at the lower end of the traction box 4. A plurality of auxiliary blocks 304 are fixed at the lower end of the traction box 4. The outer wall of the auxiliary block 304 is slidably connected to the inner wall of the auxiliary port 11.

[0031] In this embodiment, the wire rope 10 is first reeled in or released by the traction structure 6 to adjust the height position of the inspection platform 9, and then the adjustment motor 301 of the adjustment structure 3 drives the adjustment screw 302 to rotate, so that the adjustment block 303 slides inside the adjustment groove 12, thereby causing the traction box 4 to move left and right, and finally adjusting the horizontal position of the inspection platform 9.

[0032] In an optional embodiment, the traction structure 6 includes a worm gear 601 rotatably installed inside the traction box 4, and driving wheels 602 are fixed at both ends of the worm gear 601. A winding roller 603 is fixed at the other end of the driving wheel 602, and a steel wire rope 10 is wound around the winding roller 603. The driving wheel 602 is connected to the guide structure 7 through a transmission belt 604, and the worm gear 601 is meshed and connected to the driving structure 5.

[0033] It should be noted that the worm gear 601 is driven to rotate by the driving structure 5, thereby driving the driving wheel 602 and the winding roller 603 on both sides of the worm gear 601 to rotate. When the driving wheel 602 rotates, the guide structure 7 is driven by the transmission belt 604 to start running, so that when the winding roller 603 winds or releases the wire rope 10, the guide structure 7 can adjust the position of the wire rope 10 to prevent the wire ropes 10 from being entangled with each other.

[0034] In an optional embodiment, the guiding structure 7 includes a driven wheel 701 rotatably mounted inside the traction box 4, the driven wheel 701 being transmission-connected to the driving wheel 602 via a transmission belt 604, a reciprocating screw 702 being fixed at one end of the driven wheel 701, the reciprocating screw 702 being threadedly connected to a reciprocating block 704, the reciprocating block 704 being slidingly connected to a fixed rod 703, the fixed rod 703 being fixed inside the traction box 4, a guide groove 705 being provided at one end of the reciprocating block 704 close to the winding roller 603, guide frames 706 being symmetrically fixed on both sides of the guide groove 705, a guide roller 707 being rotatably mounted between the two guide frames 706, and the outer wall of the guide roller 707 being in contact with the outer wall of the wire rope 10.

[0035] It should be noted that, since the driving wheel 602 and the driven wheel 701 are connected by the transmission belt 604, when the driving wheel 602 rotates, the driven wheel 701 also rotates, and the driven wheel 701 drives the reciprocating screw 702 to rotate. Since the reciprocating block 704 is slidably connected with the fixed rod 703, the reciprocating block 704 moves along the axial direction of the reciprocating screw 702 under the rotation of the reciprocating screw 702. A guide groove 705 is provided at one end of the reciprocating block 704 close to the winding roller 603, which is used to accommodate and guide the wire rope 10. Guide frames 706 are symmetrically fixed on both sides of the guide groove 705, and a guide roller 707 is rotatably installed between the two guide frames 706. The outer wall of the guide roller 707 fits the outer wall of the wire rope 10, which helps to reduce the friction and wear of the wire rope 10 during the movement, while improving its stability and service life.

[0036] In an optional embodiment, the driving structure 5 includes a driving motor 501 installed on the outer wall of the traction box 4 and a worm 502 rotatably installed inside the traction box 4. The output end of the driving motor 501 extends to the inside of the traction box 4 and is fixedly connected to the worm 502. The worm 502 is meshed with the worm wheel 601. A maintenance structure 8 is provided at the upper end of the traction box 4.

[0037] It should be noted that when the driving motor 501 is started and rotated, it drives the worm 502 to rotate together. The rotation of the worm 502 is transmitted to the worm wheel 601 through meshing, so that the worm wheel 601 also starts to rotate. There is a self-locking feature between the worm 502 and the worm wheel 601, thereby ensuring the reliability of its transmission.

[0038] In an optional embodiment, the maintenance structure 8 includes a fat supply box 801 installed at the upper end of the traction box 4 and a piston assembly 81 connected to the end of the worm 502 away from the driving motor 501, the fat supply box 801 is connected to the fat pipe 804 through a fat inlet pipe 802, and a one-way inlet valve 803 is provided at the connection between the fat inlet pipe 802 and the fat pipe 804. The two sides of the fat pipe 804 are connected to a connecting pipe 807 through a fat outlet pipe 806, and a one-way outlet valve 805 is provided at the connection between the fat pipe 804 and the fat outlet pipe 806. The connecting pipe 807 is connected to an annular nozzle 809 through a delivery pipe 808, and the annular nozzle 809 is arranged inside the traction box 4, and the annular nozzle 809 surrounds the wire rope 10.

[0039] It should be noted that the one-way inlet valve 803 is installed at the connection between the grease inlet pipe 802 and the grease pipe 804 to ensure that the grease can only flow in one direction, from the grease supply box 801 to the grease pipe 804, to prevent backflow. The one-way outlet valve 805 is installed at the connection between the grease pipe 804 and the grease outlet pipe 806 to ensure that the grease can only flow in one direction, from the grease pipe 804 to the grease outlet pipe 806, to prevent backflow. When lubrication is required, the grease enters the grease pipe 804 from the grease supply box 801 through the grease inlet pipe 802 and the one-way inlet valve 803, and the grease in the grease pipe 804 enters the connecting pipe 807 through the one-way outlet valve 805 and the grease outlet pipe 806. The grease in the connecting pipe 807 is then transported to the annular nozzle 809 through the delivery pipe 808, and the annular nozzle 809 evenly sprays or applies the grease on the wire rope 10. When the piston assembly 81 is in operation, a certain pressure is generated to achieve the delivery or distribution of the grease.

[0040] In an optional embodiment, the piston assembly 81 includes a rotating disk 811 fixed to one end of the worm gear 502 away from the drive motor 501, and the edge of the rotating disk 811 is rotatably connected to the drive rod 813 through a connecting rod 1 812, and the other end of the drive rod 813 is rotatably connected to the piston rod 815 through a connecting rod 2 814, and the other end of the piston rod 815 is fixed with a piston block 816, and the piston block 816 is slidably installed inside the grease tube 804.

[0041] It should be noted that when the worm 502 rotates, it drives the rotating disk 811 to rotate. The rotating disk 811 drives the driving rod 813 to perform eccentric motion through the connecting rod 1 812. The driving rod 813 drives the piston rod 815 and the piston block 816 to perform linear reciprocating motion up and down inside the grease tube 804 through the connecting rod 2 814. When the piston block 816 moves upward, the grease flows from the grease supply box 801 to the grease tube 804. When the piston block 816 moves downward, it flows from the grease tube 804 to the grease outlet tube 806, and is finally transported to the annular nozzle 809. The annular nozzle 809 evenly sprays or applies the grease on the wire rope 10.

[0042] The above embodiment discloses a boiler maintenance platform, wherein the driving motor 501 in the driving structure 5 is started, and the driving motor 501 drives the worm 502 to rotate. The worm 502 meshes with the worm wheel 601, so that the worm wheel 601 rotates, and then drives the driving wheel 602 and the winding roller 603 to rotate. The rotation of the winding roller 603 causes the wire rope 10 to be wound or released, thereby adjusting the height position of the maintenance platform 9. At the same time, the driving wheel 602 drives the driven wheel 701 in the guide structure 7 to rotate through the transmission belt 604, and the driven wheel 701 drives the reciprocating screw 702 to rotate, so that the reciprocating block 704 slides on the fixed rod 703, adjusts the position of the guide groove 705 and the guide roller 707, and ensures that the wire rope 10 will not be entangled with each other during the movement.

[0043] After the inspection platform 9 reaches the required height, the adjustment motor 301 in the adjustment structure 3 is started. The adjustment motor 301 drives the adjustment screw 302 to rotate, so that the adjustment block 303 slides in the adjustment slot 12. The sliding of the adjustment block 303 drives the traction box 4 to move left and right, thereby adjusting the horizontal position of the inspection platform 9. The auxiliary block 304 slides in the auxiliary port 11 to ensure that the traction box 4 moves smoothly.

[0044] While the traction structure 6 is running, the maintenance structure 8 starts to work. The rotation of the worm 502 drives the rotating disk 811 to rotate, and the rotating disk 811 drives the piston rod 815 and the piston block 816 to make linear reciprocating motion up and down in the grease tube 804 through the connecting rod 1 812 and the connecting rod 2 814. When the piston block 816 moves upward, the one-way inlet valve 803 opens, and the grease flows from the grease supply box 801 into the grease tube 804; when the piston block 816 moves downward, the one-way outlet valve 805 opens, and the grease flows from the grease tube 804 into the grease outlet tube 806. The grease is transported to the annular nozzle 809 through the connecting pipe 807 and the delivery pipe 808. The annular nozzle 809 evenly sprays or applies the grease on the wire rope 10 to reduce friction and wear, and improve stability and service life.

[0045] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A boiler maintenance platform, characterized in that: The invention comprises a fixed seat (1), wherein brackets (2) are symmetrically fixed on the left and right sides of the lower end of the fixed seat (1), a traction box (4) is installed on the upper end of the fixed seat (1), an adjustment groove (12) and two auxiliary openings (11) are provided on the upper end of the fixed seat (1), an adjustment structure (3) is arranged inside the adjustment groove (12), a plurality of through openings (401) are provided on the bottom of the traction box (4), two guide wheels (402) are rotatably installed inside each of the through openings (401), a plurality of steel wire ropes (10) and a traction structure (6) for winding the steel wire ropes (10) are arranged inside the traction box (4), the plurality of steel wire ropes (10) pass through the through openings (401) and the auxiliary openings (11) in sequence to jointly hoist the maintenance platform (9), and the outer walls of the two guide wheels (402) are in contact with the outer walls of the steel wire ropes (10); The adjustment structure (3) comprises an adjustment motor (301) pressed on one end of a fixing seat (1) and an adjustment screw (302) rotatably mounted inside an adjustment slot (12); an output end of the adjustment motor (301) extends to the inside of the adjustment slot (12) and is fixedly connected to the adjustment screw (302); an adjustment block (303) is slidably arranged inside the adjustment slot (12); the adjustment screw (302) is threadedly connected to the adjustment block (303); the adjustment block (303) is fixed to the lower end of a traction box (4); a plurality of auxiliary blocks (304) are fixed to the lower end of the traction box (4); an outer wall of the auxiliary block (304) is slidably connected to an inner wall of the auxiliary port (11).

2. A boiler maintenance platform according to claim 1, characterized in that: The traction structure (6) comprises a worm wheel (601) rotatably mounted inside the traction box (4), a driving wheel (602) being fixed at both ends of the worm wheel (601), a winding roller (603) being fixed at the other end of the driving wheel (602), a steel wire rope (10) being wound around the winding roller (603), the driving wheel (602) being connected to the guide structure (7) through a transmission belt (604), and the worm wheel (601) being meshedly connected to the driving structure (5).

3. A boiler maintenance platform according to claim 2, characterized in that: The guide structure (7) comprises a driven wheel (701) rotatably mounted inside the traction box (4); the driven wheel (701) is connected to the driving wheel (602) through a transmission belt (604); a reciprocating screw (702) is fixed at one end of the driven wheel (701); the reciprocating screw (702) is threadedly connected to a reciprocating block (704); the reciprocating block (704) is slidably connected to a fixed rod (703); the fixed rod (703) is fixed inside the traction box (4); a guide groove (705) is formed at one end of the reciprocating block (704) close to the winding roller (603); guide frames (706) are symmetrically fixed on both sides of the guide groove (705); a guide roller (707) is rotatably mounted between the two guide frames (706); the outer wall of the guide roller (707) is in contact with the outer wall of the steel wire rope (10).

4. A boiler maintenance platform according to claim 2, characterized in that: The driving structure (5) comprises a driving motor (501) mounted on the outer wall of the traction box (4) and a worm (502) rotatably mounted inside the traction box (4); an output end of the driving motor (501) extends to the inside of the traction box (4) and is fixedly connected to the worm (502); the worm (502) is meshed with a worm wheel (601); and a maintenance structure (8) is provided at the upper end of the traction box (4).

5. A boiler maintenance platform according to claim 4, characterized in that: The maintenance structure (8) comprises a grease supply box (801) installed at the upper end of the traction box (4) and a piston assembly (81) connected to one end of the worm (502) away from the drive motor (501); the grease supply box (801) is connected to the grease pipe (804) via a grease inlet pipe (802); a one-way inlet valve (803) is provided at the connection between the grease inlet pipe (802) and the grease pipe (804); both sides of the grease pipe (804) are connected to a connecting pipe (807) via a grease outlet pipe (806); a one-way outlet valve (805) is provided at the connection between the grease pipe (804) and the grease outlet pipe (806); the connecting pipe (807) is connected to an annular nozzle (809) via a delivery pipe (808); the annular nozzle (809) is arranged inside the traction box (4); and the annular nozzle (809) surrounds the steel wire rope (10).

6. A boiler maintenance platform according to claim 5, characterized in that: The piston assembly (81) includes a rotating disk (811) fixed to one end of the worm (502) away from the driving motor (501); the edge of the rotating disk (811) is rotatably connected to the driving rod (813) via a connecting rod 1 (812); the other end of the driving rod (813) is rotatably connected to the piston rod (815) via a connecting rod 2 (814); a piston block (816) is fixed to the other end of the piston rod (815); and the piston block (816) is slidably installed inside the grease tube (804).