Slag cleaning device for papermaking waste heat boiler

Abstract

The utility model relates to the technical field of mechanical engineering, and discloses a slag cleaning device for a papermaking waste heat boiler, which comprises a shell, the top of the shell is fixedly connected with a fixing plate, the front side and the rear side of the bottom of the fixing plate are fixedly connected with first electric push rods, and the output ends of the two first electric push rods are fixedly connected with a containing shell. The device comprises a containing shell, a plurality of cavities are formed in the containing shell, springs are arranged in the multiple cavities, limiting plates are slidably connected in the multiple cavities, and scraping plates are fixedly connected to the exteriors of the limiting plates. According to the slag scraping device, the first electric push rod outputs power to drive the containing shell to move, and the structure of the spring and the limiting plate in the containing shell is matched, so that the beneficial effect that the scraping plate is attached to the inner wall of the shell in a self-adaptive mode and scrapes slag is achieved. The spring drives the scraper blade to adjust through the limiting plate according to fluctuation of the contact surface, so that the scraper blade is tightly attached to the inner wall of the shell, attached slag is efficiently cleaned, and the cleaning effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, and in particular to a slag cleaning device for a waste heat boiler in papermaking. Background Technology

[0002] In the papermaking industry, waste heat boilers are key equipment for recovering heat from waste gases and liquids generated during production. Their inner walls are often affected by slag (such as wood ash and molten impurities) produced during high-temperature combustion, impacting thermal efficiency. Long-term slag accumulation not only reduces heat transfer performance but can also cause pipe blockages, equipment corrosion, and even safety hazards. Therefore, efficiently cleaning the slag adhering to the boiler's inner walls is crucial for ensuring stable operation and extending the service life of waste heat boilers.

[0003] Traditional slag cleaning devices mostly use mechanical scrapers at fixed angles or manual periodic cleaning methods. Fixed scrapers are usually rigidly installed on the inner wall of the boiler. Due to manufacturing errors and thermal deformation of the inner wall of the boiler, the scraper is difficult to completely conform to the complex curved surface, resulting in slag residue in some areas. Manual cleaning requires stopping the machine and disassembling the equipment, which is time-consuming, labor-intensive, and poses risks of working at height, and cannot meet the needs of continuous production.

[0004] Therefore, a slag cleaning device for waste heat boilers in papermaking is proposed to address the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a slag cleaning device for waste heat boilers in papermaking, which aims to improve the problem that scrapers in the prior art are difficult to fully adhere to the inner wall of the boiler.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A slag cleaning device for a waste heat boiler in papermaking includes a shell, a fixed plate fixedly connected to the top of the shell, an electric push rod fixedly connected to the front and rear sides of the bottom of the fixed plate, an accommodating shell fixedly connected to the output ends of the two electric push rods, a plurality of cavities opened inside the accommodating shell, a spring installed inside each of the plurality of cavities, a limit plate slidably connected inside each of the plurality of cavities, and a scraper fixedly connected to the outside of the limit plate.

[0008] As a further description of the above technical solution:

[0009] A support plate is fixedly connected to the bottom inner wall of the housing. A rotating plate is rotatably connected to the top of the support plate. An electric push rod is fixedly connected to the top of the rotating plate. The output end of the electric push rod is fixedly connected to the rotating plate. A power rod is rotatably connected inside the rotating plate. Connecting plates are rotatably connected to the left and right sides of the power rod. A fixed shaft is rotatably connected to the bottom of both connecting plates. An inclined plate is fixedly connected to the top of both connecting plates. A fixed shaft is rotatably connected to the rear side of the inclined plate.

[0010] As a further description of the above technical solution:

[0011] One end of the spring is fixedly connected to the outside of the limiting plate, and the other end of the spring is fixedly connected to the inner wall of the cavity;

[0012] As a further description of the above technical solution:

[0013] The two fixed shafts are respectively fixedly connected to the inner walls of the left and right sides of the housing, and the outer side of the inclined plate is in contact with the inner wall of the housing.

[0014] As a further description of the above technical solution:

[0015] The left and right sides of the fixed shaft are fixedly connected to the inner wall of the housing, and the left and right sides of the power rod are fixedly connected to limit blocks.

[0016] As a further description of the above technical solution:

[0017] A closed door is provided on the rear side of the housing, and a handle is fixedly connected to the outside of the closed door.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, the electric push rod outputs power to drive the movement of the receiving shell. Combined with the structure of the spring and limiting plate inside the receiving shell, this achieves the beneficial effect of the scraper adaptively conforming to the inner wall of the shell and scraping away slag. The spring, based on the undulations of the contact surface, drives the scraper to adjust via the limiting plate, ensuring it tightly conforms to the inner wall of the shell, efficiently cleaning the attached slag and improving the cleaning effect.

[0020] 2. In this utility model, the rotating plate is driven to rotate by the second electric push rod, which in turn drives the second rotating plate, the power rod, and other structures to operate, achieving the beneficial effect of tilting the inclined plate and dumping the scraped slag outside the device. The power rod, connecting plate, and other components work together to make the inclined plate rotate around a fixed axis, smoothly discharging the slag, avoiding secondary accumulation, and improving the cleaning efficiency and practicality of the device. Attached Figure Description

[0021] Figure 1This is a three-dimensional schematic diagram of a slag cleaning device for a waste heat boiler in papermaking, as proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of the fixing plate of a slag cleaning device for a waste heat boiler in papermaking, as proposed in this utility model.

[0023] Figure 3 for Figure 2 Enlarged view of point A;

[0024] Figure 4 This is a schematic diagram of the structure of the electric push rod 2 of the slag cleaning device for a waste heat boiler in papermaking proposed in this utility model.

[0025] Legend:

[0026] 1. Housing; 2. Fixing plate; 3. Electric push rod one; 4. Receiving shell; 5. Cavity; 6. Spring; 7. Limiting plate; 8. Scraper; 9. Support plate; 10. Rotating plate one; 11. Electric push rod two; 12. Rotating plate two; 13. Power rod; 14. Connecting plate; 15. Fixing shaft one; 16. Inclined plate; 17. Fixing shaft two. Detailed Implementation

[0027] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Reference Figures 1 to 3 This utility model provides an embodiment of a slag cleaning device for a waste heat boiler in papermaking. The device includes a housing 1 as its main structure, providing installation and accommodating space for other components. It serves as the foundation for the entire slag cleaning device, ensuring the orderly assembly and proper functioning of all components. A fixing plate 2 is fixedly connected to the top of the housing 1, providing an installation base for an electric push rod 3 and ensuring stable support and positioning. Electric push rods 3 are fixedly connected to the front and rear sides of the bottom of the fixing plate 2, providing power to drive the movement of the accommodating shell 4. The output ends of the two electric push rods 3 are fixedly connected to the accommodating shell 4 and driven by the electric push rods 3, serving as the carrier for the cavity 5, spring 6, limiting plate 7, and scraper 8. Their movement drives the internal components to perform slag cleaning operations.

[0029] The housing 4 has multiple cavities 5 inside, providing installation space for the springs 6 and limiting plates 7. The limiting plates 7 can slide within the cavities 5, while simultaneously constraining the movement direction of the springs 6. Each cavity 5 contains a spring 6, one end fixed to the outside of the limiting plate 7 and the other end fixed to the inner wall of the cavity 5, providing elastic support. Based on the undulations of the contact surface, the limiting plates 7 drive the scraper 8 to adaptively adjust, ensuring a tight fit between the scraper 8 and the inner wall of the housing 1. The limiting plates 7 are slidably connected within each of the multiple cavities 5. The inner sliding part 5 connects to the scraper 8, transmitting the elastic force of the spring 6 to the scraper 8. At the same time, the sliding within the cavity 5 is constrained by the spring 6, ensuring the stable and orderly movement of the scraper 8. One end of the spring 6 is fixedly connected to the outside of the limiting plate 7, and the other end of the spring 6 is fixedly connected to the inner wall of the cavity 5. The scraper 8 is fixedly connected to the outside of the limiting plate 7 and contacts the inner wall of the housing 1. With the cooperation of the spring 6 and the limiting plate 7, it closely fits the inner wall of the housing 1 and scrapes off the slag adhering to the inner wall of the housing 1. It is the direct execution part for cleaning slag.

[0030] Reference Figure 1 and Figure 4 A support plate 9 is fixedly connected to the bottom inner wall of the housing 1, providing support and a base for the rotation of the rotating plate 10, ensuring that the rotating plate 10 can rotate stably. The top of the support plate 9 is rotatably connected to the rotating plate 10, which rotates under the drive of the electric push rod 11. It is a key component for transmitting the power of the electric push rod 11. The top of the rotating plate 10 is fixedly connected to the electric push rod 11, which pushes the rotating plate 12 at its output end, providing power for the movement of the rotating plate 12 and subsequent components, and driving the relative movement of the rotating plate 10 and the rotating plate 12. The output end of the electric push rod 11 is fixedly connected to the rotating plate 12, and the power rod 13 is rotatably connected inside.

[0031] Driven by the electric push rod 11, the power rod 13 operates. This is the intermediate component connecting the electric push rod 11 and the power rod 13. The power rod 13 is rotatably connected inside the rotating plate 12, with limit blocks fixed on both sides. Externally, the left and right sides are rotatably connected to the connecting plate 14. The power rod 13's rotation drives the connecting plate 14 to swing, making it a crucial hub for power transmission. Limit blocks are fixedly connected to both sides of the power rod 13 to restrict its rotation range, ensuring that the power rod 13 moves within a reasonable angle range and protecting all... To ensure the stability and accuracy of the component's movement, connecting plates 14 are rotatably connected to the left and right sides of the power rod 13. The bottom of the connecting plates 14 is rotatably connected to a fixed shaft 15, and the top is fixedly connected to an inclined plate 16. This converts the rotation of the power rod 13 into the rotation of the inclined plate 16, and serves as a transmission component connecting the power rod 13 and the inclined plate 16. The bottom of each connecting plate 14 is rotatably connected to a fixed shaft 15, with the opposite side fixed to the inner walls of the left and right sides of the housing 1, providing rotational support for the connecting plates 14 and ensuring that the connecting plates 14 can swing stably.

[0032] Two fixed shafts 15 are fixedly connected to the left and right inner walls of the housing 1 on opposite sides. An inclined plate 16 is fixedly connected to the top of each of the two connecting plates 14, with its outer side contacting the inner wall of the housing 1. The inner rear side of the inclined plate 16 is rotatably connected to a fixed shaft 17. Driven by the connecting plates 14, the inclined plate 16 rotates around the fixed shaft 17, discharging the slag scraped off by the scraper 8 at an inclined angle outside the device. This is a key component for slag discharge. The outer side of the inclined plate 16 contacts the inner wall of the housing 1, and the inner rear side of the inclined plate 16 is rotatably connected to... The fixed shaft 17 is fixed to the inner wall of the shell 1 on both sides, providing rotational support for the inclined plate 16 and ensuring that the inclined plate 16 can rotate stably to achieve smooth discharge of slag. The fixed shaft 17 is fixed to the inner wall of the shell 1 on both sides. A closed door is provided on the rear side of the shell 1. A handle is fixedly connected to the outside of the closed door and is located on the rear side of the shell 1. The closed door is used to close the shell 1 to prevent dust from overflowing during slag cleaning. The handle makes it easy for operators to open and close the closed door, facilitating maintenance and repair of the inside of the device.

[0033] Working principle: First, the electric push rods 3 installed on the front and rear sides of the bottom of the fixed plate 2 are activated. The electric push rods 3 output power, pushing the receiving shell 4 downward, so that the scraper 8 inside the receiving shell 4, which is slidably connected to the cavity 5 through the limiting plate 7 and elastically supported by the spring 6, comes into contact with the inner wall of the shell 1. During the downward movement of the receiving shell 4, the spring 6 inside the cavity 5 adjusts the scraper 8 adaptively according to the undulation of the contact surface through the limiting plate 7, ensuring that the scraper 8 is always in close contact with the inner wall of the shell 1. Thus, the scraper 8 scrapes off the slag adhering to the inner wall of the shell 1 during its movement.

[0034] When scraper 8 contacts the slag, it begins to scrape the slag. Simultaneously, a rotating plate 10 located on top of the support plate 9 at the bottom of the shell 1 rotates under the drive of an electric push rod 11. The output end of the electric push rod 11 pushes the rotating plate 12, causing the power rod 13, which is rotatably connected inside the rotating plate 12, to operate. Connecting plates 14, rotatably connected to the left and right sides of the power rod 13, swing around a fixed shaft 15. An inclined plate 16, fixedly connected to the top of the connecting plate 14, rotates around a fixed shaft 17. During rotation, the inclined plate 16 tilts, pouring the slag scraped off by scraper 8 out of the device at an inclined angle.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A slag cleaning device for a papermaking waste heat boiler, comprising a housing (1), characterized in that: A fixing plate (2) is fixedly connected to the top of the housing (1). Electric push rods (3) are fixedly connected to the front and rear sides of the bottom of the fixing plate (2). A receiving shell (4) is fixedly connected to the output ends of the two electric push rods (3). Multiple cavities (5) are opened inside the receiving shell (4). Springs (6) are provided inside the multiple cavities (5). Limiting plates (7) are slidably connected inside the multiple cavities (5). A scraper (8) is fixedly connected to the outside of the limiting plate (7).

2. A slag cleaning device for a papermaking waste heat boiler according to claim 1, characterized in that A support plate (9) is fixedly connected to the bottom inner wall of the housing (1). A rotating plate (10) is rotatably connected to the top of the support plate (9). An electric push rod (11) is fixedly connected to the top of the rotating plate (10). A rotating plate (12) is fixedly connected to the output end of the electric push rod (11). A power rod (13) is rotatably connected inside the rotating plate (12). A connecting plate (14) is rotatably connected to both the left and right sides of the power rod (13). A fixed shaft (15) is rotatably connected to the bottom of both connecting plates (14). An inclined plate (16) is fixedly connected to the top of both connecting plates (14). A fixed shaft (17) is rotatably connected to the rear side of the inclined plate (16).

3. A slag cleaning device for a papermaking waste heat boiler according to claim 1, characterized in that: One end of the spring (6) is fixedly connected to the outside of the limiting plate (7), and the other end of the spring (6) is fixedly connected to the inner wall of the cavity (5).

4. A slag cleaning device for a papermaking waste heat boiler according to claim 2, characterized in that: The two fixed shafts (15) are fixedly connected to the inner walls of the left and right sides of the housing (1) respectively, and the outer side of the inclined plate (16) is in contact with the inner wall of the housing (1).

5. A slag cleaning device for a papermaking waste heat boiler according to claim 2, characterized in that: The left and right sides of the fixed shaft (17) are fixedly connected to the inner wall of the housing (1), and the left and right sides of the power rod (13) are fixedly connected to limit blocks.

6. A slag cleaning device for a papermaking waste heat boiler according to claim 1, characterized in that: A closed door is provided on the rear side of the housing (1), and a handle is fixedly connected to the outside of the closed door.

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