Multi-stage synergistic reinforced phosphogypsum filling material slurry stirring device
By using a multi-stage synergistic enhanced mixing device, which employs propulsion and cutting mixing blades, a pneumatic suspension system, and a wall scraping mechanism, the problems of phosphogypsum particle sedimentation, sidewall adhesion, and density stratification are solved, achieving a highly efficient mixing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI ANYUAN NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-06-26
AI Technical Summary
Existing mixing technologies suffer from problems such as phosphogypsum particle settling and accumulation, sidewall adhesion, and density stratification, resulting in uneven mixing.
A multi-stage synergistic strengthening mixing device is adopted, including propulsion mixing blades, cutting mixing blades, pneumatic suspension system and wall scraping mechanism. Through the variable diameter blade group, axial large circulation flow, airflow to lift particles and scrape the wall, destroying the particle settling tendency and improving the mixing intensity.
It effectively solves the problems of material settling and accumulation, sidewall adhesion, and density stratification, and greatly improves the mixing effect.
Smart Images
Figure CN224404915U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of material mixing devices, specifically a multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device. Background Technology
[0002] Phosphogypsum is an industrial waste residue discharged from phosphoric acid plants, phosphate fertilizer plants, and some synthetic detergent industries, but it is an important renewable resource. Phosphogypsum is grayish-white, sometimes yellow or grayish-yellow, and is a complex crystalline substance. Its main component is calcium sulfate, and it contains small amounts of harmful impurities such as phosphorus, fluorine, organic matter, and silica. Its pH value is around 4, making it acidic. Phosphogypsum filling slurry is a non-Newtonian fluid formed by adding phosphogypsum as the main aggregate and binders such as cement, fly ash, and activators. Its solid content is typically >65%. In its filling applications, the homogeneity of the slurry directly determines the strength of the filling body, but existing mixing technologies have the following common problems:
[0003] 1. Severe sedimentation and accumulation: During the mixing process, phosphogypsum particles will quickly settle to the bottom of the container, forming a dead zone of a certain thickness. Conventional mixers have insufficient bottom shear strength and cannot effectively mix the sediment.
[0004] 2. Sidewall adhesion loss: High-viscosity slurry will form a solidified layer on the container wall, and mechanical scrapers cannot effectively scrape the wall;
[0005] 3. Density stratification defect: The density difference between the binder and phosphogypsum can cause vertical separation. Traditional unidirectional stirring cannot affect the density stratification trend, resulting in uneven mixing.
[0006] To address this, the prior art, disclosed in CN201821806355.X, describes a stirring shaft for a dissimilar alloy reactor. The shaft includes a reactor shell, with a motor fixedly connected to the top center of the shell. A stirring shaft is installed within the reactor shell's inner cavity. The stirring shaft comprises a power shaft and stirring devices. One end of the power shaft passes through the reactor shell and connects to the motor at the top of the shell. The power shaft is a columnar structure with several herringbone teeth evenly arranged around its side. Several evenly arranged cylindrical internal thread grooves are formed on the side of the power shaft. Several stirring devices are arranged in a line on the power shaft. Through the design of the slider and stirring devices, a certain number of stirring devices can be installed within the reactor shell's inner cavity according to actual conditions, thereby ensuring efficient stirring and reaction within the reactor cavity and improving the overall practicality of the reactor.
[0007] However, the device still has some obvious defects in use: although the above-mentioned stirring mechanism improves the density stratification defect of the material to a certain extent by setting up multiple stirring devices, it still suffers from sedimentation and sidewall adhesion during use, which affects the stirring quality and uniformity of the material. Utility Model Content
[0008] The purpose of this invention is to provide a multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device to solve the problems mentioned in the background art.
[0009] To achieve the above objectives, this utility model provides the following technical solution:
[0010] A multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device includes:
[0011] A mixing tank body is used to hold the mixed materials. A feed inlet is provided on one side of the top of the mixing tank body, and a discharge outlet is provided at the bottom of the mixing tank body.
[0012] A stirring mechanism, comprising a main shaft, a propulsion stirring blade, and a cutting stirring blade, wherein the propulsion stirring blade and the cutting stirring blade are fixedly mounted on the main shaft, and a pair of cutting stirring blades are provided, which are equidistantly positioned below the propulsion stirring blade;
[0013] A double-cone feeding mechanism includes a propulsion housing, which is fixedly installed on the outer side of the mixing tank. Two material propulsion chambers are formed inside the propulsion housing. A main helix and a secondary helix are rotatably mounted on a fixed axis within each material propulsion chamber. The outlet of the material propulsion chamber containing the secondary helix merges with the material propulsion chamber containing the main helix. Materials are fed into the material propulsion chambers containing the main helix and the secondary helix respectively through inlets provided on the propulsion housing. The outlet end of the material propulsion chamber containing the main helix is aligned with the inlet on the mixing tank.
[0014] A pneumatic suspension system, comprising an annular air distribution groove and an aeration pipe disposed at the bottom of the mixing tank, the annular air distribution groove communicating with the aeration pipe installed at the bottom of the mixing tank, and the side of the aeration pipe away from the annular air distribution groove communicating with a Roots blower; and,
[0015] The wall scraping mechanism consists of a pair of symmetrically arranged rotating wall scraping rods inside the mixing tank. The upper and lower ends of the pair of rotating wall scraping rods are fixedly connected by an upper connecting ring and a lower connecting ring, respectively. The upper connecting ring and the lower connecting ring cooperate with the connecting structures provided on the upper and lower sides of the mixing tank. The outer edges of the pair of rotating wall scraping rods are close to the inner wall of the mixing tank, and the wall scraping operation is performed by the fixed-axis rotation of the rotating wall scraping rods.
[0016] Preferably, a geared stirring motor is fixedly mounted on the top of the stirring tank via a mounting bracket, and the output shaft of the geared stirring motor is fixedly connected to the main shaft.
[0017] Preferably, the propulsive stirring blade consists of three sets of stirring fan blades arranged in a ring array, and the cutting stirring blade consists of five sets of serrated cutting stirring fan blades arranged in a ring array.
[0018] Preferably, a discharge valve is threaded onto the discharge port, and a base is fixedly installed at the bottom of the mixing tank.
[0019] Preferably, the main spiral and the secondary spiral are driven by a feeding motor connected to their respective rotating shafts, and the main spiral is a variable diameter tapered structure with a deep front screw groove and a shallow rear screw groove.
[0020] Preferably, a top cover is fixedly installed at the opening above the mixing tank, and a rotating support is fixedly installed at the bottom of the top cover. The inner fixed ring of the rotating support is fixedly connected to the bottom of the top cover. The upper connecting ring above the rotating scraper is welded and fixed to the outer movable ring of the rotating support, so that the rotating scraper can rotate around the axis of the rotating support. A rotating positioning groove is provided at the bottom of the mixing tank, and the lower connecting ring at the bottom of the rotating scraper is movably embedded in the rotating positioning groove.
[0021] Preferably, a one-way drive rubber wheel is also fixedly installed on the upper part of the main shaft. The outer ring of the one-way drive rubber wheel movably abuts against the transition rubber wheel, and the transition rubber wheel also movably abuts against the inner side of the upper connecting ring. During the clockwise stirring motion of the main shaft, the outer ring of the one-way drive rubber wheel does not rotate with the main shaft. At this time, the rotating scraper rod is in a stationary state. During the counterclockwise scraping motion of the main shaft, the outer ring of the one-way drive rubber wheel rotates with the main shaft. At this time, the rotating scraper rod rotates synchronously.
[0022] Preferably, the bottom of the mixing tank is provided with a hemispherical discharge ramp, the annular air distribution groove is provided at the hemispherical discharge ramp, and the rotating scraper is adaptively bent at the hemispherical discharge ramp, so that it is in clearance fit with the hemispherical discharge ramp.
[0023] Compared with the prior art, the beneficial effects of this utility model are:
[0024] 1. The stirring shaft of this utility model is equipped with a variable diameter blade group with sparse upper and dense lower sections. The upper propulsion stirring blades drive the slurry to form a large axial circulation flow, and the lower cutting stirring blades use high-frequency cutting action to destroy the tendency of particle settling. Through multi-stage synergistic stirring of the propulsion stirring blades and the cutting stirring blades at different heights, the shear and mixing strength of the material is improved.
[0025] 2. The bottom of the mixing tank of this utility model is equipped with a pneumatic suspension system. Through the annular air distribution groove at the bottom of the container, the airflow is pulsed and pumped, thereby lifting the settled particles by the airflow, and cooperating with the cutting mixing blades above to cut and mix the material.
[0026] 3. This utility model is also equipped with a wall scraping mechanism, which causes the material adhering to the inner wall of the mixing tank to detach by rotating the wall scraping mechanism, thereby further improving the mixing effect.
[0027] This invention, through the design of variable diameter blade assembly, pneumatic suspension system and wall scraping mechanism, can effectively solve the problems of density stratification, sedimentation and accumulation and side wall adhesion of materials during the mixing process, and greatly improve the mixing effect of materials. Attached Figure Description
[0028] Figure 1 This is a cross-sectional schematic diagram of the internal installation structure of the mixing tank of this utility model;
[0029] Figure 2 This is a schematic diagram of the upper connecting ring connection structure of this utility model;
[0030] Figure 3 This is a three-dimensional schematic diagram of the overall structure of this utility model.
[0031] In the diagram: 1. Mixing tank body, 2. Inlet, 3. Outlet, 4. Main shaft, 5. Propeller blade, 6. Cutting blade, 7. Propulsion shell, 8. Material propulsion chamber, 9. Main spiral, 10. Inlet, 11. Annular air distribution groove, 12. Aeration pipe, 13. Rotary scraper, 14. Upper connecting ring, 15. Lower connecting ring, 16. Mounting bracket, 17. Geared mixing motor, 18. Mixing fan blade, 19. Serrated cutting mixing fan blade, 20. Outlet valve, 21. Base, 22. Top cover, 23. Rotary support, 24. Rotary positioning groove, 25. One-way drive rubber wheel, 26. Transition rubber wheel. Detailed Implementation
[0032] 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.
[0033] Please see Figure 1-3 This utility model provides a technical solution:
[0034] Example 1:
[0035] A multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device includes:
[0036] The mixing tank 1 is used to hold the mixed materials. The mixing tank 1 has a feed inlet 2 on one side of the top and a discharge outlet 3 at the bottom.
[0037] The mixing mechanism includes a main shaft 4, a propulsion mixing blade 5, and a cutting mixing blade 6. The propulsion mixing blade 5 and the cutting mixing blade 6 are fixedly installed on the main shaft 4. A pair of cutting mixing blades 6 are provided and are equidistantly arranged below the propulsion mixing blade 5.
[0038] The double-cone feeding mechanism includes a propulsion housing 7, which is fixedly installed on the outer side of the mixing tank 1. Two material propulsion chambers 8 are opened inside the propulsion housing 7. A main spiral 9 and a secondary spiral are installed in a fixed-axis rotating manner in the material propulsion chamber 8. The outlet of the material propulsion chamber 8 where the secondary spiral is located merges with the material propulsion chamber 8 where the main spiral 9 is located. Materials are fed into the material propulsion chambers 8 where the main spiral 9 and the secondary spiral are located through the inlet 10 provided on the propulsion housing 7, respectively. The outlet end of the material propulsion chamber 8 where the main spiral 9 is located is aligned with the inlet 2 on the mixing tank 1.
[0039] The pneumatic suspension system includes an annular air distribution groove 11 and an aeration pipe 12 disposed at the bottom of the mixing tank 1. The annular air distribution groove 11 is connected to the aeration pipe 12 installed at the bottom of the mixing tank 1. The side of the aeration pipe 12 away from the annular air distribution groove 11 is connected to a Roots blower.
[0040] The wall scraping mechanism consists of a pair of symmetrically arranged rotating wall scraping rods 13 inside the mixing tank 1. The upper and lower ends of the pair of rotating wall scraping rods 13 are fixedly connected by an upper connecting ring 14 and a lower connecting ring 15, respectively. The upper connecting ring 14 and the lower connecting ring 15 cooperate with the connecting structures provided on the upper and lower sides of the mixing tank 1. The outer edges of the pair of rotating wall scraping rods 13 are close to the inner wall of the mixing tank 1, and the wall scraping operation is performed by the fixed-axis rotation of the rotating wall scraping rods 13.
[0041] In this embodiment, the mixing tank 1 serves as the material-bearing mechanism and the connection structure with other structures. It is a cylindrical tank structure with an inlet 2 and a outlet 3 on its upper and lower sides. A discharge valve 20 is threaded onto the outlet 3. A base 21 is fixedly installed at the bottom of the mixing tank 1. The inlet 2 is used for injecting phosphogypsum raw materials, and the outlet 3 is used for releasing the mixture. An agitation mechanism is installed inside the mixing tank 1, including a main shaft 4, a propeller-type agitator 5, and a cutting agitator 6. (Refer to the attached instruction manual.) Figure 1 Included with instruction manual Figure 2The propulsion mixing blade 5 consists of three sets of annular array mixing fan blades 18, and the cutting mixing blade 6 consists of five sets of annular array sawtooth cutting mixing fan blades 19. This arrangement is significant because the propulsion mixing blade 5 and the cutting mixing blade 6 form a variable-diameter blade group. The upper propulsion mixing blades drive the slurry to form a large axial circulation flow, while the lower cutting mixing blades' high-frequency cutting action disrupts the particle settling tendency. Through multi-stage synergistic mixing at different heights by the propulsion and cutting mixing blades, the shear and mixing strength of the material is improved. A double-tapered feeding mechanism is also provided. This mechanism includes a propulsion housing 7, inside which are a pair of material propulsion chambers 8. A main spiral 9 and a secondary spiral are mounted in a fixed-axis rotating manner within the material propulsion chambers 8. (Refer to the attached instruction manual.) Figure 2 The main spiral 9 is a variable-diameter conical structure with a deep front groove and a shallow rear groove. This design increases the compressive strength of the material as it enters the shallow rear groove, thus compacting the slurry. The secondary spiral is a conventional conical structure with equal pitch and groove. The material propulsion chamber 8 of the secondary spiral merges with the material propulsion chamber 8 of the main spiral 9, ensuring thorough mixing before the material enters the mixing tank 1. The secondary spiral, rotating at a higher speed, forces the binder into the phosphogypsum main material flow, creating a vortex shear field at the intersection of the two spirals. This initial mixing of the two materials with significantly different densities reduces stratification due to density at the source. The premixed material enters the mixing tank 1 through the inlet 2. To prevent sedimentation, a pneumatic suspension system is installed at the bottom of the mixing tank 1. A Roots blower pumps air into the annular air distribution trough 11 through the aeration pipe 12. As the gas rises, it carries the liquid particles to the surface, causing them to float. During the process, mixing occurs as the propulsion mixing blade 5 and the cutting mixing blade 6 rotate. A hemispherical discharge ramp is provided at the bottom of the mixing tank 1. The annular air distribution groove 11 is located at the hemispherical discharge ramp, and the rotating scraper rod 13 is adaptively bent at the hemispherical discharge ramp, thereby achieving a clearance fit with the hemispherical discharge ramp. In addition, to solve the problem of material adhesion to the side wall, a scraping mechanism is also provided inside the mixing tank 1. The scraping mechanism consists of a pair of rotating scraper rods 13 symmetrically arranged inside the mixing tank 1. They are connected to the upper and lower sides of the mixing tank 1 through the upper connecting ring 14 and the lower connecting ring 15. The outer edges of the pair of rotating scraper rods 13 are close to the inner wall of the mixing tank 1, thereby solving the problem of material scraping. In summary, the above solution, through the setting of variable diameter blade group, pneumatic suspension system and scraping mechanism, can effectively solve the problems of density stratification, sedimentation and accumulation and side wall adhesion of materials during the mixing process, and greatly improve the mixing effect of materials.
[0042] Example 2:
[0043] A geared stirring motor 17 is fixedly installed on the top of the mixing tank 1 via a mounting bracket 16, and the output shaft of the geared stirring motor 17 is fixedly connected to the main shaft 4.
[0044] In this embodiment, the drive mechanism of the main shaft 4 is further disclosed. The rotation of the reduction stirring motor 17 drives the main shaft 4 to rotate, thereby performing the mixing and stirring operation of the materials in the stirring tank 1.
[0045] Example 3:
[0046] A top cover 22 is fixedly installed at the opening above the mixing tank 1. A rotating support 23 is fixedly installed at the bottom of the top cover 22. The inner fixed ring of the rotating support 23 is fixedly connected to the bottom of the top cover 22. The upper connecting ring 14 above the rotating scraper 13 is welded and fixed to the outer movable ring of the rotating support 23, so that the rotating scraper 13 can rotate around the axis of the rotating support 23. A rotating positioning groove 24 is opened at the bottom of the mixing tank 1, and the lower connecting ring 15 at the bottom of the rotating scraper 13 is movably embedded in the rotating positioning groove 24.
[0047] In this embodiment, the connection structure between the rotating scraper rod 13 and the mixing tank 1 is further disclosed. A rotating support 23 is fixedly installed at the bottom of the upper cover 22. The rotating support 23 is a bearing-like structure with inner and outer rings. Ball bearings are arranged between the inner and outer rings. Therefore, when the inner ring of the rotating support 23 is fixedly connected to the bottom of the upper cover 22, its outer ring can rotate normally on a fixed axis. The outer ring of the rotating support 23 is welded and fixed to the upper connecting ring 14. Therefore, the upper connecting ring 14 can rotate around the axis of the rotating support 23 on a fixed axis. The rotating support 23 is coaxially arranged with the main shaft 4. In order to ensure the stability of the rotation process, the lower connecting ring 15 is movably embedded in the rotating positioning groove 24 opened at the bottom of the mixing tank 1, thereby limiting its rotation and ensuring the stability of the rotating scraper rod 13 during rotation.
[0048] Example 4:
[0049] A one-way drive rubber wheel 25 is also fixedly installed on the upper part of the main shaft 4. The outer ring of the one-way drive rubber wheel 25 moves against the transition rubber wheel 26. The transition rubber wheel 26 also moves against the inner side of the upper connecting ring 14. During the clockwise stirring motion of the main shaft 4, the outer ring of the one-way drive rubber wheel 25 does not rotate with the main shaft. At this time, the rotating scraper rod 13 is stationary. During the counterclockwise scraping motion of the main shaft 4, the outer ring of the one-way drive rubber wheel 25 rotates with the main shaft 4. At this time, the rotating scraper rod 13 rotates synchronously.
[0050] In this embodiment, a one-way drive rubber wheel 25 is provided on the main shaft 4. The one-way drive rubber wheel 25 is a one-way rotating ratchet mechanism. The working principle of this structure is similar to the rear wheel mechanism of a bicycle. It can achieve one-way synchronous rotation. When the main shaft 4 drives its inner ring to rotate counterclockwise, the pawl of the inner ring engages with the outer ring, so that the outer ring of the one-way drive rubber wheel 25 rotates synchronously with the main shaft 4. At this time, the rotation of the outer ring of the one-way drive rubber wheel 25 drives the transition rubber wheel 26 to rotate, which in turn drives the upper connecting ring 14 to rotate, thereby completing the wall scraping operation. When the main shaft 4 rotates clockwise, the inner ring pawl of the one-way drive rubber wheel 25 disengages from the outer ring. At this time, the rotation of the main shaft 4 will not drive the upper connecting ring 14 to rotate. The purpose of this setting is to control the movement state of the upper connecting ring 14 by the forward and reverse rotation of the reduction stirring motor 17. This allows for high-speed stirring when scraping is not required, and low-speed scraping when scraping is required by changing the rotation direction of the output shaft of the reduction stirring motor 17. This prevents damage to the rotating scraping rod and ensures the normal operation of scraping and stirring.
[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device, characterized in that, include: A mixing tank body is used to hold the mixed materials. A feed inlet is provided on one side of the top of the mixing tank body, and a discharge outlet is provided at the bottom of the mixing tank body. A stirring mechanism, comprising a main shaft, a propulsion stirring blade, and a cutting stirring blade, wherein the propulsion stirring blade and the cutting stirring blade are fixedly mounted on the main shaft, and a pair of cutting stirring blades are provided, which are equidistantly positioned below the propulsion stirring blade; A double-cone feeding mechanism includes a propulsion housing, which is fixedly installed on the outer side of the mixing tank. Two material propulsion chambers are formed inside the propulsion housing. A main helix and a secondary helix are rotatably mounted on a fixed axis within each material propulsion chamber. The outlet of the material propulsion chamber containing the secondary helix merges with the material propulsion chamber containing the main helix. Materials are fed into the material propulsion chambers containing the main helix and the secondary helix respectively through inlets provided on the propulsion housing. The outlet end of the material propulsion chamber containing the main helix is aligned with the inlet on the mixing tank. A pneumatic suspension system, comprising an annular air distribution groove and an aeration pipe disposed at the bottom of the mixing tank, the annular air distribution groove communicating with the aeration pipe installed at the bottom of the mixing tank, and the side of the aeration pipe away from the annular air distribution groove communicating with a Roots blower; and, The wall scraping mechanism consists of a pair of symmetrically arranged rotating wall scraping rods inside the mixing tank. The upper and lower ends of the pair of rotating wall scraping rods are fixedly connected by an upper connecting ring and a lower connecting ring, respectively. The upper connecting ring and the lower connecting ring cooperate with the connecting structures provided on the upper and lower sides of the mixing tank. The outer edges of the pair of rotating wall scraping rods are close to the inner wall of the mixing tank, and the wall scraping operation is performed by the fixed-axis rotation of the rotating wall scraping rods.
2. The multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device according to claim 1, characterized in that: A geared stirring motor is fixedly installed on the top of the mixing tank via a mounting bracket, and the output shaft of the geared stirring motor is fixedly connected to the main shaft.
3. A multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device according to claim 1 or 2, characterized in that: The propulsion stirring blade consists of three sets of stirring fan blades arranged in a ring array, and the cutting stirring blade consists of five sets of sawtooth cutting stirring fan blades arranged in a ring array.
4. The multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device according to claim 3, characterized in that: A discharge valve is threaded into the discharge port, and a base is fixedly installed at the bottom of the mixing tank.
5. The multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device according to claim 4, characterized in that: The main spiral and the secondary spiral are driven by feeding motors connected to their respective rotating shafts. The main spiral is a variable diameter tapered structure with a deep front groove and a shallow rear groove.
6. The multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device according to claim 5, characterized in that: A top cover is fixedly installed at the opening above the mixing tank. A rotating support is fixedly installed at the bottom of the top cover. The inner fixed ring of the rotating support is fixedly connected to the bottom of the top cover. The upper connecting ring above the rotating scraper is welded and fixed to the outer movable ring of the rotating support, so that the rotating scraper can rotate around the axis of the rotating support. A rotating positioning groove is provided at the bottom of the mixing tank, and the lower connecting ring at the bottom of the rotating scraper is movably embedded in the rotating positioning groove.
7. The multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device according to claim 6, characterized in that: A one-way drive rubber wheel is also fixedly installed on the upper part of the main shaft. The outer ring of the one-way drive rubber wheel moves against the transition rubber wheel, and the transition rubber wheel moves against the inner side of the upper connecting ring. During the clockwise stirring motion of the main shaft, the outer ring of the one-way drive rubber wheel does not rotate with the main shaft. At this time, the rotating scraper rod is in a stationary state. During the counterclockwise scraping motion of the main shaft, the outer ring of the one-way drive rubber wheel rotates with the main shaft. At this time, the rotating scraper rod rotates synchronously.
8. The multi-stage synergistic reinforcement type phosphogypsum filling slurry mixing device according to claim 7, characterized in that: The bottom of the mixing tank is provided with a hemispherical discharge ramp, the annular air distribution groove is provided at the hemispherical discharge ramp, and the rotating scraper is adaptively bent at the hemispherical discharge ramp so that it fits the hemispherical discharge ramp with a clearance.