A power plant boiler cleaning and slagging mechanism

Abstract

This utility model discloses a boiler slag removal and cleaning mechanism for power plants, relating to the technical field of boiler slag removal equipment. It includes a base, with a scissor lift at the bottom and a worktable at the top. At least two sets of scrapers are equidistantly arranged in a ring on the surface of the worktable. A partition divides the worktable into two independent chambers, and a motor is installed at the bottom of the worktable, with a rotating rod connected to the motor's output. In this utility model, the staggered, equidistantly arranged scrapers allow the upper scraper to cover most of the boiler's inner wall, while the lower scrapers, through a staggered arrangement, fill in any remaining blind spots, achieving 100% coverage as much as possible. This prevents residual slag from affecting localized overheating of the boiler and reducing its thermal efficiency. Furthermore, the scrapers can be adjusted according to the boiler's inner diameter for better slag removal.

Description

Technical Field

[0001] This utility model relates to the technical field of boiler slag scraping equipment, and in particular to a boiler cleaning and slag scraping mechanism for power plants. Background Technology

[0002] Power plant boilers, also known as power plant boilers, are one of the three main pieces of equipment in thermal power plants. They generate electricity by burning fuel to produce high-temperature, high-pressure steam that drives a steam turbine generator. After prolonged operation, slag accumulates on the inner walls of power plant boilers, requiring slag scraping equipment to remove it. Currently, power plant boiler slag scraping mechanisms typically use single-shaft rotating scrapers or chain scrapers. However, these scrapers are limited by their single-layer movement trajectory and cannot cover the curved surfaces and edges of disc-shaped boilers. As a result, residual slag accumulates over time, leading to increased thermal resistance, decreased boiler thermal efficiency, and even safety accidents such as localized overheating and boiler tube rupture. Utility Model Content

[0003] This invention provides a slag scraping mechanism for cleaning power plant boilers, which solves the problems in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A slag-scraping mechanism for cleaning power plant boilers includes a base, a scissor lift is provided at the bottom of the base, a worktable is provided at the top of the scissor lift, and at least two sets of scrapers are provided circumferentially at equal intervals on the surface of the worktable.

[0006] The workbench is internally divided into two independent chambers by a partition. A motor is installed at the bottom of the workbench, and the output end of the motor is connected to a rotating rod. The rotating rod passes through the two independent chambers inside the workbench and is connected to a first bevel gear. A second bevel gear is equidistantly connected to the surface of the first bevel gear in an annular shape. A sleeve is connected to one side of the second bevel gear. A screw is threaded into the sleeve, and the screw passes through the workbench and is connected to a pad that contacts the scraper.

[0007] As a further description of the above technical solution:

[0008] The two sets of scrapers are arranged alternately.

[0009] As a further description of the above technical solution:

[0010] The surface of the sleeve is fitted with a bearing that is fixedly connected to the partition.

[0011] As a further description of the above technical solution:

[0012] A connecting plate is fixedly connected to the surface of the partition, and a guide rod connected to the scraper is movably sleeved on the surface of the connecting plate.

[0013] As a further description of the above technical solution:

[0014] The screw has an annular plate movably sleeved on its surface, and a rack is connected to the inner wall of the annular plate. A toothed wheel is connected to the surface of the rack, and a threaded rod that is threadedly connected to the pad is connected to the surface of the toothed wheel.

[0015] As a further description of the above technical solution:

[0016] The annular plate has a groove at its inner bottom, and a slider that is rotatably connected to the bottom end of the threaded rod is slidably connected inside the groove.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0018] In this invention, the scrapers are arranged in an alternating ring at equal intervals, allowing the upper scraper to cover most of the inner wall of the boiler, while the lower scraper, through an alternating arrangement, fills in the remaining blind areas, achieving 100% coverage as much as possible. This prevents residual slag from affecting local overheating of the boiler and reducing its thermal efficiency. Furthermore, the scraper can be adjusted according to the inner diameter of the boiler to facilitate better slag removal. Attached Figure Description

[0019] Figure 1 A schematic diagram of a slag scraping mechanism for cleaning a power plant boiler;

[0020] Figure 2 This is a schematic diagram of the internal structure of the workbench in this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the annular plate in this utility model.

[0022] Legend:

[0023] 1. Base; 2. Workbench; 3. Scraper; 4. First bevel gear; 5. Second bevel gear; 6. Sleeve; 7. Screw; 8. Pad; 9. Bearing; 10. Connecting plate; 11. Guide rod; 12. Annular plate; 13. Rack; 14. Gear; 15. Threaded rod; 16. Slide groove; 17. Slider. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1-3 A slag-scraping mechanism for cleaning power plant boilers includes a base 1. A scissor lift is installed at the bottom of the base 1, and a worktable 2 is installed at the top of the scissor lift. At least two sets of scrapers 3 are equidistantly arranged in a ring on the surface of the worktable 2. A partition divides the worktable 2 into two independent chambers. A motor is installed at the bottom of the worktable 2, and a rotating rod is connected to the output of the motor. The rotating rod passes through the two independent chambers inside the worktable 2 and is connected to a first bevel gear 4. A second bevel gear 5 is equidistantly arranged in a ring on the surface of the first bevel gear 4, and a sleeve 6 is connected to one side of the second bevel gear 5. The internal threaded connection includes a screw 7, which passes through the worktable 2 and connects to a pad 8 that contacts the scraper 3. This allows for easy adjustment of the scraper 3's position according to the boiler's inner diameter. Driven by a motor, the rotating rod can rotate the first bevel gear 4 on the surface of the second bevel gear 5, which in turn rotates the sleeve 6. This causes the screw 7 inside the sleeve 6 to move the scraper 3 to the boiler's inner wall via the guide rod 11. The scraper 3 can then be moved by the lifting mechanism of the scissor lift to clean and scrape slag. The scraper 3 is detachable for easy replacement of worn scrapers, facilitating maintenance.

[0026] Furthermore, the two sets of scrapers 3 are staggered, which allows the upper ring-shaped scrapers 3, which are equidistantly spaced, to cover part of the area, while the lower staggered scrapers 3 can cover the areas missed by the upper layer, thus improving the coverage rate.

[0027] Furthermore, a bearing 9 is fixedly connected to the partition plate on the surface of the sleeve 6. The bearing 9 is used to support and limit the sleeve 6, allowing it to rotate in place.

[0028] Furthermore, a connecting plate 10 is fixedly connected to the surface of the partition, and a guide rod 11 connected to the scraper 3 is movably sleeved on the surface of the connecting plate 10, which facilitates the scraper 3 to be limited to move through the guide rod 11.

[0029] Furthermore, an annular plate 12 is movably sleeved on the surface of the screw 7, and a rack 13 is connected to the inner wall of the annular plate 12. A toothed wheel 14 is connected to the surface of the rack 13, and a threaded rod 15, which is threadedly connected to the pad 8, is connected to the surface of the toothed wheel 14. This allows the rack 13 on its inner wall to rotate on the surface of the toothed wheel 14 by rotating the annular plate 12. The toothed wheel 14 drives the threaded rod 15 to rotate inside the pad 8. Since the pad 8 and the threaded rod 15 are threadedly connected, they can rotate and move, thereby rotating the threaded rod 15 into the interior of the scraper 3 for easy installation or removal of the scraper 3. The scraper 3 is coated with a tungsten carbide coating to improve its corrosion resistance and wear resistance. Threaded grooves that connect to the threaded rod 15 are equidistantly spaced on one side of the scraper 3.

[0030] Furthermore, a groove 16 is provided at the bottom of the inner side of the annular plate 12, and a slider 17 is slidably connected inside the groove 16 and rotatably connected to the bottom of the threaded rod 15. This facilitates the movement of the annular plate 12 at the top of the threaded rod 15 through the groove 16 and the slider 17.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A boiler cleaning and slag scraping mechanism for power plants, comprising a base (1), characterized in that: The base (1) is provided with a scissor lift at its inner bottom end, and a workbench (2) is provided at the top of the scissor lift. At least two sets of scrapers (3) are provided at equal intervals in a ring on the surface of the workbench (2). The workbench (2) is provided with a partition to divide the interior of the workbench (2) into two independent chambers. A motor is installed at the bottom of the workbench (2). The output end of the motor is connected to a rotating rod. The rotating rod passes through the two independent chambers inside the workbench (2) and is connected to a first bevel gear (4). The surface of the first bevel gear (4) is connected to a second bevel gear (5) at equal intervals in a ring. A sleeve (6) is connected to one side of the second bevel gear (5). A screw (7) is threaded inside the sleeve (6). The screw (7) passes through the workbench (2) and is connected to a pad (8) that contacts the scraper (3).

2. The slag scraping mechanism for power plant boilers according to claim 1, characterized in that: The two sets of scrapers (3) are arranged alternately.

3. The slag scraping mechanism for power plant boilers according to claim 1, characterized in that: The surface of the sleeve (6) is fitted with a bearing (9) that is fixedly connected to the partition.

4. The slag scraping mechanism for power plant boilers according to claim 1, characterized in that: A connecting plate (10) is fixedly connected to the surface of the partition, and a guide rod (11) connected to the scraper (3) is movably sleeved on the surface of the connecting plate (10).

5. The slag scraping mechanism for power plant boilers according to claim 1, characterized in that: The screw (7) is movably sleeved with an annular plate (12), and the inner wall of the annular plate (12) is connected with a rack (13). The surface of the rack (13) is connected with a toothed wheel (14), and the surface of the toothed wheel (14) is connected with a threaded rod (15) that is threadedly connected to the pad (8).

6. The slag scraping mechanism for power plant boilers according to claim 5, characterized in that: The annular plate (12) has a groove (16) at its inner bottom end, and a slider (17) is slidably connected inside the groove (16) and is rotatably connected to the bottom end of the threaded rod (15).

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