Phosphogypsum fly ash roadbed backfilling device

Abstract

The invention discloses an ardealite fly ash roadbed backfilling device which comprises a bottom frame, the upper surface of the bottom frame is fixedly connected with a buffer stirring box, the inner wall of the buffer stirring box is rotatably connected with a stirring shaft through a bearing, and the outer surface of the stirring shaft is fixedly connected with a plurality of stirring rods. And the upper surface of each stirring rod is fixedly connected with a connecting rod. According to the device, continuous stirring of a phosphogypsum and fly ash mixture is achieved through the cache stirring structure, the stirring power component drives the stirring shaft to rotate and drives the stirring rods and the connecting rods to synchronously operate, the mixture in the cache stirring box is continuously and fully stirred, the phenomenon that the mixture is subjected to standing hardening due to the interval of conveying and paving operation is avoided, and the working efficiency is improved. The problems of mixed material standing hardening and material segregation are effectively solved, stable performance of backfill materials is guaranteed, compactness and flatness of a roadbed backfill layer are improved, backfill quality fluctuation is reduced, it is guaranteed that roadbed construction meets the standard, the overall service life of a roadbed is prolonged, and the overall stability of the roadbed is improved.

Description

Technical Field

[0001] This invention relates to the field of roadbed construction equipment technology, and in particular to a phosphogypsum-fly ash roadbed backfilling device. Background Technology

[0002] Phosphogypsum, as a major industrial waste residue emitted during the wet-process phosphoric acid production, has a huge annual emission volume. The soluble pollutants it contains can also seep into the soil and water systems through rainwater, threatening the ecological environment and human health. Fly ash, as a by-product of coal-fired power plants, also faces the problem of large-scale accumulation and environmental pollution. Mixing and modifying phosphogypsum and fly ash in a reasonable ratio for use in roadbed backfilling can not only achieve the reduction, harmlessness, and resource utilization of the two industrial wastes, but also reduce the dependence of roadbed construction on natural aggregates, save construction costs, and conform to the concept of sustainable development.

[0003] Existing roadbed backfilling devices face challenges in controlling the transport and paving time of phosphogypsum-fly ash mixtures, leading to material segregation and rapid hardening if left to stand for too long. This results in uneven density and smoothness of the backfill layer, significant fluctuations in backfill quality, and failure to meet roadbed construction standards. Furthermore, it negatively impacts the overall stability and service life of the roadbed. To address these issues, we propose a phosphogypsum-fly ash roadbed backfilling device. Summary of the Invention

[0004] The purpose of this invention is to provide a phosphogypsum-fly ash roadbed backfilling device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A phosphogypsum-fly ash roadbed backfilling device includes a base frame. A buffer mixing tank is fixedly connected to the upper surface of the base frame. A mixing shaft is rotatably connected to the inner wall of the buffer mixing tank via bearings. Multiple mixing rods are fixedly connected to the outer surface of the mixing shaft. A connecting rod is fixedly connected to the upper surface of each mixing rod. A discharge box is fixedly connected to the bottom surface of the buffer mixing tank. A flow regulating valve is fixedly connected to the inner wall of the discharge box. A first fixing frame is fixedly connected to the upper surface of the buffer mixing tank. A mixing motor is fixedly connected inside the first fixing frame. The output end of the mixing motor is fixedly connected to one end of the mixing shaft via a reducer.

[0006] In a further embodiment, a feed box is fixedly connected to the upper surface of the buffer mixing tank, and a feed door is hinged to the upper surface of the feed box via a hinge.

[0007] In a further embodiment, a mounting plate is fixedly connected to the upper surface of the base frame, and a controller is fixedly connected to the outer surface of the mounting plate.

[0008] In a further embodiment, two first fixing plates are fixedly connected to the bottom surface of the base frame, and a rotating shaft is rotatably connected between the two first fixing plates via a bearing. A material leveling component is fixedly connected to the outer surface of the rotating shaft. A second fixing frame is fixedly connected to the outer surface of one of the first fixing plates, and a rotary motor is fixedly connected inside the second fixing frame. The output end of the rotary motor is fixedly connected to one end of the rotating shaft via a reducer.

[0009] In a further embodiment, a fixing rod is fixedly connected to the inner wall of the base frame, a guide telescopic rod is fixedly connected to the bottom surface of the fixing rod, a material leveling frame is fixedly connected to the bottom surface of the guide telescopic rod, two first compression springs are fixedly connected between the material leveling frame and the fixing rod, and a material leveling roller is rotatably connected to the inner wall of the material leveling frame through a bearing.

[0010] In a further embodiment, two second fixing plates are fixedly connected to one side of the base frame. Each of the two second fixing plates has a slide rail on its side that is close to each other. A slider is slidably connected inside each of the two slide rails. A compaction roller is rotatably connected between the two sliders through a bearing. A third fixing plate is fixedly connected between the two second fixing plates. A second compression spring is fixedly connected to both the two sliders and the third fixing plate.

[0011] In a further embodiment, four drive wheels are fixedly connected to the outer surface of the base frame.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This device achieves continuous mixing of phosphogypsum and fly ash mixture through a buffer mixing structure. The mixing power unit drives the mixing shaft to rotate, which in turn drives the mixing rod and connecting rod to operate synchronously, continuously and thoroughly mixing the mixture in the buffer mixing tank. This prevents the mixture from settling and hardening due to the interval between conveying and paving operations, while also preventing material segregation and ensuring that the components of the mixture are evenly distributed. This provides a stable material foundation for subsequent backfilling construction, effectively solving the problems of mixture settling and material segregation, ensuring the uniform and stable performance of backfill materials, thereby improving the density and smoothness of the roadbed backfill layer, reducing backfill quality fluctuations, ensuring that roadbed construction meets specifications and standards, and extending the overall service life and stability of the roadbed. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of a phosphogypsum-fly ash roadbed backfilling device.

[0014] Figure 2 This is a schematic diagram of the front section structure of a phosphogypsum-fly ash roadbed backfilling device.

[0015] Figure 3 This is a top view schematic diagram of a phosphogypsum-fly ash roadbed backfilling device.

[0016] Figure 4 This is a side view schematic diagram of a phosphogypsum-fly ash roadbed backfilling device.

[0017] In the diagram: 1. Base frame; 2. Buffer mixing tank; 3. Drive wheel; 4. Feed gate; 5. Feed box; 6. Controller; 7. Mounting plate; 8. Discharge box; 9. Mixing rod; 10. Mixing shaft; 11. Mixing motor; 12. First fixed frame; 13. Connecting rod; 14. Fixed rod; 15. First compression spring; 16. Guide telescopic rod; 17. Scale rack; 18. Scale roller; 19. Rotating shaft; 20. First fixed plate; 21. Flow regulating valve; 22. Second fixed frame; 23. Rotary motor; 24. Scale assembly; 25. Slide rail; 26. Second compression spring; 27. Compacting roller; 28. Slider; 29. ​​Second fixed plate; 30. Third fixed plate. Detailed Implementation

[0018] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-4This invention discloses a phosphogypsum-fly ash roadbed backfilling device, comprising a base frame 1. The base frame 1 serves as the installation foundation for the entire device and is constructed from high-strength steel. It has a rectangular frame structure with sufficient structural strength and load-bearing capacity to effectively support the weight of each component and prevent deformation due to uneven stress during operation. To enable mobile operation, four drive wheels 3 are fixedly connected to the outer surface of the base frame 1. These four drive wheels 3 are symmetrically installed at the four corners of the bottom surface of the base frame 1. Each drive wheel 3 is made of wear-resistant rubber and equipped with an independent braking mechanism, ensuring the device can move freely within the roadbed construction area. The device is flexible within its operating range and can achieve stable braking during operation to prevent slippage and ensure construction safety. A buffer mixing tank 2 is fixedly connected to the upper surface of the base frame 1. The buffer mixing tank 2 adopts a sealed box structure with sufficient internal buffer space for temporarily storing the phosphogypsum-fly ash mixture and continuously mixing it to prevent caking and segregation caused by prolonged standing. A mixing shaft 10 is rotatably connected to the inner wall of the buffer mixing tank 2 via a deep groove ball bearing. The axis of the mixing shaft 10 coincides with the axis of the buffer mixing tank 2, and its surface is treated with rust prevention to effectively extend its service life. Multiple stirring rods 9 are fixedly connected to the outer surface of the buffer mixing tank 2. These stirring rods 9 are evenly distributed along the axial direction of the stirring shaft 10, and each stirring rod 9 is perpendicular to the stirring shaft 10. Their length is adapted to the inner diameter of the tank, ensuring sufficient contact with the mixture inside the tank during mixing, improving the mixing effect, and preventing localized accumulation of the mixture. A connecting rod 13 is fixedly connected to the upper surface of each stirring rod 9. One end of the connecting rod 13 is welded to the stirring rod 9, and the other end extends to the vicinity of the inner wall of the buffer mixing tank 2. Multiple small stirring teeth are fixedly connected to the outer surface of the connecting rod 13. These teeth have a conical structure and can effectively break up the mixture. The agglomerated state of the mixture ensures that the phosphogypsum and fly ash mixture is evenly mixed and avoids segregation. A first fixing frame 12 is fixedly connected to the upper surface of the buffer mixing tank 2. Its bottom is fixedly connected to the upper surface of the buffer mixing tank 2 by bolts. The connection is firm and easy to disassemble and maintain. A stirring motor 11 is fixedly connected inside the first fixing frame 12. Its output end is fixedly connected to one end of the stirring shaft 10 through a reducer. The reducer can effectively adjust the output speed of the stirring motor 11, so that the stirring shaft 10 drives the stirring rod 9 and the connecting rod 13 to rotate at a uniform speed. This can ensure the mixing effect and avoid the mixture from splashing due to excessive speed.

[0020] To facilitate convenient feeding of the mixture, a feed box 5 is fixedly connected to the upper surface of the buffer mixing tank 2. The feed box 5 has a funnel-shaped structure, and its bottom is connected to the interior of the buffer mixing tank 2. The feed inlet size of the feed box 5 is larger than that of the feed inlet size of the buffer mixing tank 2, which facilitates the pouring of the pre-mixed and modified phosphogypsum-fly ash mixture into the buffer mixing tank 2. A feed door 4 is hinged to the upper surface of the feed box 5. The size of the feed door 4 is adapted to the size of the feed inlet size of the feed box 5. A handle is fixedly connected to one side of the feed door 4, which is convenient for the operator to open and close. When the feed door 4 is closed, it can seal the feed box 5 to prevent the mixture from splashing during the mixing process, and at the same time, it can prevent rainwater, dust and other debris from entering the buffer mixing tank 2 and contaminating the mixture. A discharge box 8 is fixedly connected to the bottom surface of the buffer mixing tank 2. The discharge box 8 has a rectangular tubular structure, and its top is connected to the interior of the buffer mixing tank 2. Its bottom extends to the bottom of the base frame 1, which facilitates the smooth discharge of the mixture. A flow regulating valve 21 is fixedly connected to the inner wall of the discharge box 8. The flow regulating valve 21 is an electric butterfly valve, which is electrically connected to the controller 6. The discharge flow of the discharge box 8 can be precisely adjusted by the controller 6 to ensure that the discharge amount of the mixture matches the paving speed, avoiding excessive discharge that leads to mixture accumulation, or insufficient discharge that leads to insufficient thickness of the roadbed backfill layer, thus ensuring the flatness and compaction of the backfill layer. A mounting plate 7 is fixedly connected to the upper surface of the base frame 1. The mounting plate 7 is a rectangular steel plate structure, which is fixedly connected to the upper surface of the base frame 1 by bolts. The controller 6 is fixedly connected to the outer surface of the mounting plate 7. The surface of the controller 6 is equipped with an operation panel and a display screen. The operation panel is equipped with multiple control buttons, which can be used to control the start and stop of the mixing motor 11, the rotary motor 23, and the flow regulating valve 21, as well as the operating parameters. The display screen can display the operating status and related parameters of each component in real time, which is convenient for operators to monitor the operation of the device in real time, adjust the operating parameters in a timely manner, and ensure smooth construction.

[0021] To achieve uniform spreading of the mixture, two first fixing plates 20 are fixedly connected to the bottom surface of the base frame 1. Both first fixing plates 20 are rectangular steel plate structures, symmetrically installed on the bottom surface of the base frame 1 near the discharge box 8. A rotating shaft 19 is rotatably connected between the two first fixing plates 20 via bearings. The shaft's axis is parallel to the length of the base frame 1. A material distribution assembly 24 is fixedly connected to the outer surface of the rotating shaft 19. The material distribution assembly 24 includes multiple material distribution plates, which are evenly distributed along the axial direction of the rotating shaft 19. The material distribution plates have an arc-shaped structure, their length matching the length of the rotating shaft 19, and their edges are ground to avoid scratching the roadbed surface. A second fixing frame 22 is fixedly connected to the outer surface of a first fixing plate 20. The second fixing frame 22 has the same structure as the first fixing frame 12, both being U-shaped. It is fixedly connected to the first fixing plate 20 by bolts. A rotary motor 23 is fixedly connected inside the second fixing frame 22. The rotary motor 23 is also a variable frequency geared motor. Its output end is fixedly connected to one end of the rotating shaft 19 through a reducer. The output speed of the rotary motor 23 can be adjusted by the controller 6, so that the rotating shaft 19 drives the material leveling component 24 to rotate at a uniform speed, so as to evenly spread the mixture discharged from the discharge box 8, break the accumulation state of the mixture, and ensure the flatness of the roadbed backfill layer.

[0022] To further improve the smoothness of the paving, a fixing rod 14 is fixedly connected to the inner wall of the base frame 1. The fixing rod 14 is a rectangular steel pipe structure, and its two ends are welded and fixed to the inner walls of both sides of the base frame 1. A guide telescopic rod 16 is fixedly connected to the bottom surface of the fixing rod 14, which can extend and retract in the vertical direction. A material distribution frame 17 is fixedly connected to the bottom surface of the guide telescopic rod 16. The material distribution frame 17 has a U-shaped structure with its opening facing downward. Two first compression springs 15 are fixedly connected between the material distribution frame 17 and the fixing rod 14. The two first compression springs 15 are symmetrically installed on both sides of the guide telescopic rod 16. The first compression springs 15 are cylindrical helical springs, which have good elastic restoring ability. The material leveling frame 17 acts as a buffer and support, ensuring it remains in close contact with the roadbed surface and adapting to its undulations. A material leveling roller 18 is rotatably connected to the inner wall of the frame 17 via bearings. The material leveling roller 18 has a cylindrical structure, with its axis parallel to the axis of the rotating shaft 19. A wear-resistant rubber sleeve covers the outer surface of the material leveling roller 18, allowing for secondary compaction and leveling of the mixture during paving, while preventing damage to the roadbed surface and improving the density of the backfill layer. Two second fixing plates 29 are fixedly connected to one side of the base frame 1. Both second fixing plates 29 are rectangular steel plates, symmetrically installed on one side of the base frame 1. 29. Each side of the material paving roller 18 is provided with a sliding track 25, which is a rectangular groove extending vertically. Sliding blocks 28 are slidably connected inside each sliding track 25. The sliding blocks 28 are rectangular and their dimensions match those of the sliding tracks 25, allowing them to slide vertically along the tracks. A compaction roller 27 is rotatably connected between the two sliding blocks 28 via a bearing. The compaction roller 27 is cylindrical, with a diameter larger than that of the leveling roller 18. Made of high-strength steel and hardened, the compaction roller 27 possesses excellent wear resistance and compressive strength, enabling it to compact the paved mixture, improve the density of the backfill layer, and ensure the compaction of the roadbed. The backfill quality meets the construction specifications and standards. A third fixing plate 30 is fixedly connected between the two second fixing plates 29. The third fixing plate 30 is a rectangular steel plate structure, and its two ends are welded and fixed to the top of the two second fixing plates 29 respectively. The two sliders 28 are fixedly connected to the third fixing plate 30 with second compression springs 26. The second compression springs 26 have the same structure as the first compression springs 15. They can buffer and pressurize the sliders 28, so that the compaction roller 27 always adheres to the surface of the mixture with appropriate pressure, ensuring the compaction effect. At the same time, it can adapt to the thickness changes of the roadbed backfill layer, avoiding excessive compaction pressure that causes the mixture to splash, or insufficient compaction pressure that causes insufficient density.

[0023] The working principle of this invention is: The operator opens the feed gate 4 by the handle and pours the pre-mixed and modified phosphogypsum-fly ash mixture into the feed box 5. The mixture enters the buffer mixing tank 2 through the feed box 5. The controller 6 starts the mixing motor 11, which drives the mixing shaft 10 to rotate at a constant speed through the reducer. The mixing shaft 10 drives the mixing rod 9 and the connecting rod 13 to rotate synchronously, continuously mixing the mixture in the buffer mixing tank 2 to prevent the mixture from caking and segregating. The controller 6 adjusts the opening of the flow regulating valve 21 to control the discharge flow of the mixture, so that the mixture is evenly discharged to the roadbed construction area through the discharge box 8. The controller 6 starts the rotary motor 23, which drives the rotating shaft 19 to rotate at a constant speed through the reducer. The rotating shaft 19 drives the material leveling component 24 to rotate synchronously, feeding the discharged mixture into the roadbed construction area. The initial paving and leveling process is carried out by the device moving slowly via the drive wheel 3. The material leveling roller 18, under the action of the first compression spring 15, adheres to the surface of the mixture, performing secondary compaction and leveling on the initially paved mixture to adapt to the undulations of the roadbed surface and ensure the paving smoothness. The compaction roller 27, under the action of the second compression spring 26, adheres to the surface of the mixture, performing compaction on the paved mixture to improve the density of the roadbed backfill layer and complete the roadbed backfilling operation. The controller 6 can monitor the operating speed of the mixing motor 11 and the rotary motor 23 in real time, as well as the discharge flow rate of the flow regulating valve 21, and adjust the relevant parameters in a timely manner according to the roadbed construction requirements. The controller 6 can control the moving speed of the drive wheel 3 to match the discharge speed, paving speed and compaction speed, ensuring that the smoothness and density of the roadbed backfill layer are uniform.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A phosphogypsum-fly ash roadbed backfilling device, comprising a base frame (1), characterized in that: A buffer mixing tank (2) is fixedly connected to the upper surface of the base frame (1). A stirring shaft (10) is rotatably connected to the inner wall of the buffer mixing tank (2) via a bearing. A plurality of stirring rods (9) are fixedly connected to the outer surface of the stirring shaft (10). A connecting rod (13) is fixedly connected to the upper surface of each stirring rod (9). A discharge box (8) is fixedly connected to the bottom surface of the buffer mixing tank (2). A flow regulating valve (21) is fixedly connected to the inner wall of the discharge box (8). A first fixing frame (12) is fixedly connected to the upper surface of the buffer mixing tank (2). A stirring motor (11) is fixedly connected inside the first fixing frame (12). The output end of the stirring motor (11) is fixedly connected to one end of the stirring shaft (10) via a reducer.

2. The phosphogypsum-fly ash roadbed backfilling device according to claim 1, characterized in that: The upper surface of the buffer mixing tank (2) is fixedly connected to the feed box (5), and the upper surface of the feed box (5) is hinged to the feed door (4).

3. The phosphogypsum-fly ash roadbed backfilling device according to claim 1, characterized in that: The upper surface of the base frame (1) is fixedly connected to the mounting plate (7), and the outer surface of the mounting plate (7) is fixedly connected to the controller (6).

4. The phosphogypsum-fly ash roadbed backfilling device according to claim 1, characterized in that: The bottom surface of the base frame (1) is fixedly connected to two first fixing plates (20), and a rotating shaft (19) is rotatably connected between the two first fixing plates (20) through a bearing. A material leveling component (24) is fixedly connected to the outer surface of the rotating shaft (19). A second fixing frame (22) is fixedly connected to the outer surface of one of the first fixing plates (20). A rotary motor (23) is fixedly connected inside the second fixing frame (22). The output end of the rotary motor (23) is fixedly connected to one end of the rotating shaft (19) through a reducer.

5. The phosphogypsum-fly ash roadbed backfilling device according to claim 1, characterized in that: A fixed rod (14) is fixedly connected to the inner wall of the base frame (1). A guide telescopic rod (16) is fixedly connected to the bottom surface of the fixed rod (14). A material leveling frame (17) is fixedly connected to the bottom surface of the guide telescopic rod (16). Two first compression springs (15) are fixedly connected between the material leveling frame (17) and the fixed rod (14). A material leveling roller (18) is rotatably connected to the inner wall of the material leveling frame (17) through a bearing.

6. The phosphogypsum-fly ash roadbed backfilling device according to claim 1, characterized in that: Two second fixing plates (29) are fixedly connected to one side of the base frame (1). Slides (25) are provided on the side of the two second fixing plates (29) that are close to each other. Slider (28) is slidably connected inside the two slides (25). A compaction roller (27) is rotatably connected between the two sliders (28) through a bearing. A third fixing plate (30) is fixedly connected between the two second fixing plates (29). A second compression spring (26) is fixedly connected between the two sliders (28) and the third fixing plate (30).

7. The phosphogypsum-fly ash roadbed backfilling device according to claim 1, characterized in that: Four drive wheels (3) are fixedly connected to the outer surface of the base frame (1).

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