A center drive thickener with self-adapting conditioning of the mud scraper

Abstract

This utility model discloses a center-driven thickener with adaptive scraper adjustment, including a thickening tank. A working support is installed on the top of the thickening tank, and a rotatable central shaft is mounted on the working support. The central shaft is collinear with the axis of the thickening tank. A sludge discharge pipe is located in the middle of the bottom of the thickening tank. A rake frame is connected to the end of the central shaft away from the working support. Several connecting rods are connected to the bottom of the rake frame. A sleeve is fitted onto the outer wall of the connecting rod, and a scraper is installed on the outer wall of the sleeve. An angle and height adjustment component is provided on the connecting rod. The angle and height adjustment component is used to drive the sleeve to rotate and move along the axis of the connecting rod to adapt to the different thicknesses of the slurry underflow at the bottom of the thickening tank. When the scraper is subjected to greater scraping resistance, the scraper deflects, reducing the effective front area of ​​the scraper. At the same time, the scraper rises, reducing the thickness of the underflow in a single scraping motion. These actions work together to reduce the resistance experienced by the scraper, achieving adaptive adjustment without the need for external drive adjustment.

Description

Technical Field

[0001] This utility model belongs to the field of thickener technology, and in particular to a center-drive thickener with adaptive adjustment of the scraper. Background Technology

[0002] A center-driven thickener is a device used for dewatering wet concentrate in mineral processing. The slurry settles to the bottom of the thickening tank under gravity, forming an underflow. It is then scraped by a scraper to the center of the bottom of the tank and discharged through a sludge discharge pipe, resulting in concentrated slurry.

[0003] However, in existing center-driven thickeners, the gap between the scraper and the bottom wall of the thickener is fixed. When the density of the slurry changes, causing the underflow thickness at the bottom of the thickener to increase, the scraper will experience greater resistance as the rake rotates. This results in greater resistance on the shaft of the center-driven thickener, making the output motor prone to overload. At the same time, when there is a hardened area at the bottom of the thickener, the direct compression between the scraper and the hardened area will accelerate the damage to the scraper, affecting the subsequent scraping efficiency and reducing the operating efficiency of the center-driven thickener. Utility Model Content

[0004] In view of the above-mentioned prior art, the present invention provides a center-driven thickener with adaptive scraper adjustment. When the scraper encounters excessive resistance, it automatically deflects at a certain angle towards the tangent of the thickener, reducing the effective front area of ​​the scraper, reducing the movement distance of the underflow in a single pass, and reducing the resistance encountered by the scraper. While rotating, the scraper also rises, reducing the thickness of the underflow scraped in a single pass, further reducing the resistance encountered by the scraper. When the thickness of the underflow returns to normal, the scraper automatically resets to ensure scraping efficiency.

[0005] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows: A center-driven thickener with adaptive scraper adjustment includes a thickening tank. A working support is installed on the top of the thickening tank, and a rotatable central shaft is installed on the working support. The central shaft is collinear with the axis of the thickening tank. A sludge discharge pipe is provided in the middle of the bottom of the thickening tank. A rake frame is connected to the end of the central shaft away from the working support. Several connecting rods are connected to the bottom of the rake frame. A sleeve is fitted on the outer wall of the connecting rod, and a scraper is installed on the outer wall of the sleeve. An angle and height adjustment component is provided on the connecting rod. The angle and height adjustment component is used to drive the sleeve to rotate and move along the axis of the connecting rod to adapt to the underflow of slurry of different thicknesses at the bottom of the thickening tank.

[0006] Furthermore, the angle height adjustment component includes a spiral groove formed on the outer wall of the connecting rod, the spiral direction of the spiral groove being consistent with the rotation direction of the central shaft, a spiral mating part provided on the inner wall of the sleeve, the size and position of the spiral mating part being adapted to the spiral groove, the end of the scraper away from the central shaft being connected to the outer wall of the sleeve, the end of the scraper near the central shaft being a free end, and the deflection direction of the scraper being adapted to the rotation direction of the central shaft.

[0007] Furthermore, the helical mating part has discrete protrusions, with no fewer than two protrusions. The protrusions are symmetrically distributed on the circumferential cross-section of the sleeve, and the arrangement of the protrusions on the inner wall of the sleeve is consistent with the helical path of the helical groove.

[0008] Furthermore, the outer surface of the spiral mating part is covered with a polytetrafluoroethylene wear-resistant layer.

[0009] Furthermore, a stop ring is fixedly connected to one end of the sleeve near the rake frame, and a limiting boss is provided on the outer wall of the connecting rod. The limiting boss is located above the stop ring. The limiting boss and the stop ring work together to limit the maximum height of the sleeve to prevent the scraper from detaching from the bottom flow of the slurry.

[0010] Furthermore, a spring is fitted onto the outer wall of the connecting rod. The spring is located between the limiting boss and the stop ring. One end of the spring is fixedly connected to the limiting boss, and the end of the spring away from the limiting boss is slidably connected to the stop ring. A sealing cylinder is fitted over the spring. The limiting boss is sealed to one end of the sealing cylinder, and the stop ring slides inside the sealing cylinder.

[0011] Furthermore, an arc-shaped connecting block is connected to the end of the scraper blade away from the central axis. The arc of the arc-shaped connecting block is consistent with the outer wall of the sleeve. Bolt holes are opened on the arc-shaped connecting block, and multiple positioning holes are opened at the end of the sleeve. The bolt holes are bolted to different positioning holes to adjust the initial deflection angle of the scraper blade.

[0012] Furthermore, a sealing cap is detachably connected to the positioning hole to prevent mud and sand from entering the positioning hole.

[0013] Furthermore, the bottom wall of the thickening tank is conical, and the scraper blade has a wear-resistant rubber strip on one edge near the bottom wall of the thickening tank.

[0014] The beneficial effects of this utility model are as follows: the length direction of the scraper blade forms a certain angle with the direction of its movement. When the density of the slurry entering the thickener changes, the thickness of the underflow at the bottom of the thickener will change accordingly. The resistance encountered by the scraper blade when scraping the underflow changes. When the underflow is thicker, the scraper blade experiences greater resistance, and the scraper blade automatically deflects in the tangential direction of its movement, reducing the effective front area of ​​the scraper blade. At the same time as the scraper blade deflects, it rises, increasing the distance between the bottom of the scraper blade and the bottom of the thickener. The thickness of the underflow scraped in a single pass is smaller, further reducing the resistance encountered by the scraper blade. This effectively avoids the problem of overload of the output motor of the center-driven thickener when the scraper blade experiences excessive resistance. The deflection and lifting of the scraper blade can also adaptively avoid areas of crusting at the bottom of the tank, reducing damage to the scraper blade and extending the service life of the equipment. When the underflow thickness returns to normal, the scraper blade adaptively returns to its original deflection angle under the action of gravity, ensuring the scraping effect. The center drive ensures the efficiency of the thickener.

[0015] The outer wall of the connecting rod is provided with a spiral groove, and the inner wall of the sleeve is provided with a spiral mating part. The spiral mating part spirals upward in the spiral groove, and the sleeve rotates and moves axially upward, realizing the deflection and lifting of the scraper. At the same time, both the spiral groove and the spiral mating part are inside the sleeve, which effectively avoids the slurry from affecting the movement of the spiral mating part. The sleeve adaptively rotates and moves axially without the need for external power drive.

[0016] There are at least two protrusions, which are symmetrically distributed on the circumferential cross-section of the sleeve to ensure that the sleeve is subjected to balanced forces during rotation and axial movement, thereby reducing eccentric loads.

[0017] A stop ring is installed on the sleeve, and a limiting boss is installed on the outer wall of the connecting rod. The limiting boss restricts the axial movement distance of the stop ring, thereby limiting the deflection angle and lifting height of the scraper blade. This ensures that the scraper blade can adapt to changes in the thickness of the underflow at the bottom of the thickener while maintaining its scraping efficiency. A spring is installed between the stop ring and the limiting boss. The damping effect of the spring prevents the scraper blade from deflecting and rising too quickly, thus avoiding damage to the equipment from impact. At the same time, the spring force allows the scraper blade to automatically deflect in the opposite direction and descend after the underflow thickness returns to normal, avoiding the problem of insufficient descent force relying solely on the scraper blade's gravity.

[0018] The sleeve is equipped with multiple positioning holes, and the arc-shaped connecting block on the scraper is spirally connected to different positioning holes. The initial deflection angle of the scraper is adjusted to ensure scraping efficiency and the operating efficiency of the thickener. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a center-driven thickener with adaptive scraper adjustment according to this utility model. Figure 2This is a cross-sectional view of a center-driven thickener with adaptive scraper adjustment according to this utility model. Figure 3 for Figure 2 Enlarged view of region A; Figure 4 This is a schematic diagram of a center-drive thickener angle and height adjustment component with adaptive scraper adjustment according to the present invention; Figure 5 This is a schematic diagram showing the disassembled angle and height adjustment component of a center-driven thickener with adaptive scraper adjustment according to this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Thickening tank; 2. Working support; 3. Central shaft; 4. Sludge discharge pipe; 5. Rake frame; 6. Connecting rod; 7. Scraper; 8. Limiting boss; 9. Stop ring; 10. Spring; 11. Sleeve; 12. Positioning hole; 13. Sealing cover; 14. Sealing cylinder; 15. Arc-shaped connecting block; 16. Spiral mating part; 17. Spiral groove. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0022] Combined with reference to the appendix Figures 1 to 5This utility model provides a center-driven thickener with adaptive scraper adjustment, including a thickener tank 1. A working support 2 is installed on the top of the thickener tank 1. A rotatable central shaft 3 is installed on the working support 2. The central shaft 3 is collinear with the axis of the thickener tank 1. A sludge discharge pipe 4 is provided in the middle of the bottom of the thickener tank 1. A rake frame 5 is connected to the end of the central shaft 3 away from the working support 2. Several connecting rods 6 are connected to the bottom of the rake frame 5. A sleeve 11 is sleeved on the outer wall of the connecting rod 6. A scraper 7 is installed on the outer wall of the sleeve 11. An angle and height adjustment component is provided on the connecting rod 6. The angle and height adjustment component is used to drive the sleeve 11 to rotate and move along the axis of the connecting rod 6 to adapt to the different thicknesses of slurry underflow at the bottom of the thickener tank 1. Initially, a motor is installed on the working support 2. The output end of the motor is connected to the central shaft 3, driving the central shaft 3 to rotate. The central shaft 3 drives the rake frame 5 to rotate, and the connecting rod 6 connected to the rake frame 5 drives the scraper 7 to rotate. The scraper 7 initially deflects at a certain angle to ensure the scraping efficiency of the scraper 7. As the thickness of the underflow at the bottom of the thickening tank 1 increases, the resistance on the scraper 7 increases. The scraper 7 deflects in the tangential direction of its circumferential movement, reducing the effective frontal area of ​​the scraper 7, reducing the radial distance of the underflow scraped by the scraper 7 in a single stroke, and reducing the resistance on the scraper 7. At the same time, the scraper 7 rises, and the thickness of the underflow scraped by the scraper 7 in a single stroke increases. The angle is reduced, further reducing the resistance of the scraper blade 7, effectively avoiding motor overload and damage caused by excessive resistance. When encountering the sludge-laden area at the bottom of the thickener 1, the scraper blade 7 can automatically deflect and rise to avoid the obstacle, and then return to its original position after passing it. This ensures scraping efficiency while reducing damage to the scraper blade 7 and extending the service life of the entire equipment. At the same time, each scraper blade 7 is equipped with an individual angle and height adjustment component, so the corresponding scraper blade 7 can deflect and rise adaptively without affecting other scraper blades 7, ensuring the scraping efficiency of the entire equipment. The underflow located at the center of the bottom of the thickener 1 is discharged through the sludge discharge pipe 4.

[0023] Preferably, the angle height adjustment component includes a spiral groove 17 formed on the outer wall of the connecting rod 6, the spiral direction of the spiral groove 17 being consistent with the rotation direction of the central shaft 3, a spiral fitting part 16 provided on the inner wall of the sleeve 11, the size and position of the spiral fitting part 16 being adapted to the spiral groove 17, the end of the scraper 7 away from the central shaft 3 being connected to the outer wall of the sleeve 11, the end of the scraper 7 near the central shaft 3 being a free end, and the deflection direction of the scraper 7 being adapted to the rotation direction of the central shaft 3. When the underflow resistance of the scraper blade 7 increases, the scraper blade 7 rotates around the axis of the sleeve 11. The sleeve 11 rotates, and the spiral fitting part 16 on the inner wall of the sleeve 11 moves spirally upward along the spiral groove 17 on the outer wall of the connecting rod 6, causing the sleeve 11 to rotate and move axially upward. Finally, the scraper blade 7 deflects and rises. The underflow resistance experienced by the scraper blade 7 is balanced with the tangential force generated by the gravity of the scraper blade 7. When the underflow resistance experienced by the scraper blade 7 decreases, under the action of the gravity of the scraper blade 7, the tangential force generated by the gravity of the scraper blade 7 is greater than the underflow resistance. The scraper blade 7 automatically deflects in the opposite direction and lowers its height to ensure the scraping efficiency of the scraper blade 7. The spiral groove 17 and the spiral fitting part 16 are wrapped by the sleeve 11. At the two ends of the sleeve 11 and the outer wall where they connect to the connecting rod 6, a combination of lip seal and labyrinth seal is used to prevent slurry from entering between the sleeve 11 and the connecting rod 6 and affecting the movement of the spiral fitting part 16 in the spiral groove 17.

[0024] Preferably, the helical mating part 16 is a discrete protrusion, with no fewer than two protrusions. The protrusions are symmetrically distributed on the circumferential cross-section of the sleeve 11, and their arrangement on the inner wall of the sleeve 11 is consistent with the helical path of the helical groove 17. Having at least two protrusions ensures balanced force distribution during the rotation and axial movement of the sleeve 11, reduces off-center load on the sleeve 11, and improves the stability of the sleeve 11. More preferably, the helical mating part 16 can be a helical rib, with the pitch and direction of rotation consistent with the helical groove 17. The contact area between the helical rib and the helical groove 17 is larger, resulting in less wear and extending the service life of the parts.

[0025] Preferably, the outer surface of the spiral mating part 16 is covered with a polytetrafluoroethylene wear-resistant layer. This effectively reduces the resistance between the spiral mating part 16 and the spiral groove 17.

[0026] Preferably, a stop ring 9 is fixedly connected to one end of the sleeve 11 near the rake frame 5, and a limiting boss 8 is provided on the outer wall of the connecting rod 6. The limiting boss 8 is located above the stop ring 9. The limiting boss 8 and the stop ring 9 work together to limit the maximum lifting height of the sleeve 11 to prevent the scraper 7 from detaching from the slurry underflow. When the sleeve 11 drives the stop ring 9 to rotate and rise, the limiting boss 8 hinders the axial upward movement of the stop ring 9, thereby limiting the maximum lifting height of the sleeve 11 and preventing the scraper 7 from deflecting at too large an angle, completely tending to the tangential direction of the scraper 7's circumferential movement, which would result in the scraper 7 scraping the underflow with too small a radial movement distance, affecting the scraping efficiency. Similarly, a limiting ring is provided on the outer wall of the connecting rod 6 near the bottom of the thickener 1 to prevent the scraper 7 from completely approaching the radial direction, which would result in the scraper 7 exerting too small a radial force on the underflow, thus failing to push the underflow to move radially.

[0027] Preferably, a spring 10 is sleeved on the outer wall of the connecting rod 6. The spring 10 is located between the limiting boss 8 and the stop ring 9. One end of the spring 10 is fixedly connected to the limiting boss 8, and the other end of the spring 10 away from the limiting boss 8 is slidably connected to the stop ring 9. A sealing cylinder 14 is sleeved on the spring 10, and one end of the limiting boss 8 is sealed to the sealing cylinder 14. The stop ring 9 slides inside the sealing cylinder 14. The spring force of the spring 10 creates a damping effect. When the scraper blade 7 encounters underflow sludge, the scraper blade 7 deflects and rises rapidly. The hard impact of the stop ring 9 against the limiting boss 8 would damage the components. By setting the spring 10, the load impact is buffered. Simultaneously, the spring force of the spring 10 and the gravity of the scraper blade 7 work together to achieve the reset of the scraper blade 7. Especially when the weight of the scraper blade 7 is less restricted, by setting a threshold for the preload of the spring 10, when the underflow resistance is less than the spring preload, the scraper blade 7 does not adjust, ensuring the initial position of the scraper blade 7. The deflection angle is stable. Spring 10 is sleeved on the outer wall of connecting rod 6. Sealing cylinder 14 is sleeved on the outside of spring 10. The end of sealing cylinder 14 away from scraper 7 is fixedly connected to limiting boss 8. Stop ring 9 enters the interior of sealing cylinder 14 from the end of sealing cylinder 14 near scraper 7. When stop ring 9 rotates and moves axially with sleeve 11, stop ring 9 slides inside sealing cylinder 14. By setting sealing cylinder 14, spring 10 is sealed and protected to prevent slurry from corroding spring 10 and affecting the elastic change sensitivity of spring 10.

[0028] Preferably, an arc-shaped connecting block 15 is connected to the end of the scraper blade 7 away from the central axis 3. The arc of the arc-shaped connecting block 15 matches the outer wall of the sleeve 11. Bolt holes are provided on the arc-shaped connecting block 15, and multiple positioning holes 12 are provided at the end of the sleeve 11. The bolt holes are bolted to different positioning holes 12 to adjust the initial deflection angle of the scraper blade 7. The bolt holes are bolted to different positioning holes 12 to adjust the initial deflection angle of the scraper blade 7. The positioning holes 12 can be provided on the outer wall of the sleeve 11 or at the end of the sleeve 11. By adjusting the initial deflection angle of the scraper blade 7, it is ensured that the scraper blade 7 is at the optimal deflection angle during normal operation.

[0029] Preferably, a sealing cap 13 is detachably connected to the positioning hole 12 to prevent mud and sand from entering the positioning hole 12. For positioning holes 12 that are not bolted, the sealing cap 13 is used to seal and protect them to prevent slurry from entering the positioning hole 12 and affecting subsequent use.

[0030] Preferably, the bottom wall of the thickener 1 is conical, and the scraper 7 is provided with a wear-resistant rubber strip on one edge near the bottom wall of the thickener 1. The conical bottom wall of the thickener 1 facilitates the radial movement of the slurry underflow along the side of the scraper 7 to the center of the thickener 1, improving scraping efficiency. The bottom of the scraper 7 is aligned with the conical bottom wall of the thickener 1. When the scraper 7 deflects, the distance between the bottom parts of the scraper 7 and the conical bottom wall of the thickener 1 changes accordingly. By providing a wear-resistant rubber strip on one edge of the scraper 7 near the bottom wall of the thickener 1, the rubber strip undergoes elastic deformation when the scraper 7 deflects, preventing damage caused by friction between the hard bottom of the scraper 7 and the bottom wall of the thickener 1, while also allowing the scraper 7 to deflect smoothly.

[0031] Working principle: First, based on the density of the slurry underflow, bolt holes on the arc-shaped connecting block 15 are selected to connect with different positioning holes 12 on the sleeve 11 to adjust the initial deflection angle of the scraper 7. The slurry raw material enters the thickening tank 1 through the conveying pipe. Under the action of gravity, the slurry settles into the bottom of the thickening tank, forming a denser underflow. The central shaft 3 rotates, driving the rake frame 5 and connecting rod 6 to rotate together. When the scraper 7 revolves around the central shaft 3, it pushes the underflow radially towards the middle of the bottom of the thickening tank 1. When the thickness of the underflow increases or encounters underflow caking, the resistance on the scraper 7 increases. The scraper 7 deflects around the axis of the sleeve 11, deflecting in the tangential direction, reducing the effective front area of ​​the scraper 7. The radial length of the scraper 7 is smaller, the radial displacement of the underflow decreases, and the resistance on the scraper 7 decreases. At the same time, the spiral fitting part 16 on the inner wall of the sleeve 11 spirals upward along the spiral groove 17, while the sleeve 11 rotates and... The axial upward movement causes the scraper 7 to move upward, increasing the distance between the scraper 7 and the bottom of the thickener 1. As the slurry underflow descends, its density increases, and the height of the scraper 7 increases. Consequently, the density or thickness of the underflow scraped by the scraper 7 decreases, further reducing the resistance on the scraper 7. This effectively prevents the scraper 7 from being damaged by excessive resistance and avoids overloading the thickener's power system. After the thickness of the slurry underflow returns to normal or the underflow has condensed, the resistance on the scraper 7 returns to normal. Under the elastic force of the spring 10, the stop ring 9 moves downward, and the spiral mating part 16 spirals downward along the spiral groove 17. Consequently, the sleeve 11 rotates in the opposite direction and moves axially downward. The scraper 7 deflects radially and moves downward, reducing the distance between the scraper 7 and the bottom wall of the thickener 1. This increases the effective front area of ​​the scraper 7, ensuring the scraping efficiency of the scraper 7. Finally, the underflow is discharged from the sludge discharge pipe 4.

[0032] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the protection scope of the stated claims.

Claims

1. A center-driven thickener with adaptive scraper adjustment, characterized in that: The system includes a thickening tank (1), a working support (2) is installed on the top of the thickening tank (1), a rotatable central shaft (3) is installed on the working support (2), the central shaft (3) is collinear with the axis of the thickening tank (1), a sludge discharge pipe (4) is provided in the middle of the bottom of the thickening tank (1), a rake frame (5) is connected to the end of the central shaft (3) away from the working support (2), a number of connecting rods (6) are connected to the bottom of the rake frame (5), a sleeve (11) is sleeved on the outer wall of the connecting rod (6), a scraper (7) is installed on the outer wall of the sleeve (11), and an angle height adjustment component is provided on the connecting rod (6). The angle height adjustment component is used to drive the sleeve (11) to rotate and move along the axis of the connecting rod (6) to adapt to the different thicknesses of slurry underflow at the bottom of the thickening tank (1).

2. The center-driven thickener with adaptive scraper adjustment according to claim 1, characterized in that: The angle height adjustment assembly includes a spiral groove (17) formed on the outer wall of the connecting rod (6). The spiral direction of the spiral groove (17) is consistent with the rotation direction of the central shaft (3). The inner wall of the sleeve (11) is provided with a spiral fitting part (16). The size and position of the spiral fitting part (16) are adapted to the spiral groove (17). The end of the scraper (7) away from the central shaft (3) is connected to the outer wall of the sleeve (11). The end of the scraper (7) close to the central shaft (3) is a free end. The deflection direction of the scraper (7) is adapted to the rotation direction of the central shaft (3).

3. A center-driven thickener with adaptive scraper adjustment according to claim 2, characterized in that: The spiral fitting part (16) is a discrete protrusion, and the number of the protrusions is not less than two. The protrusions are symmetrically distributed on the circumferential cross section of the sleeve (11). The arrangement of the protrusions on the inner wall of the sleeve (11) is consistent with the spiral path of the spiral groove (17).

4. A center-driven thickener with adaptive scraper adjustment according to claim 2, characterized in that: The outer surface of the spiral mating part (16) is covered with a polytetrafluoroethylene wear-resistant layer.

5. A center-driven thickener with adaptive scraper adjustment according to claim 2, characterized in that: A stop ring (9) is fixedly connected to one end of the sleeve (11) near the rake frame (5). A limiting boss (8) is provided on the outer wall of the connecting rod (6). The limiting boss (8) is located above the stop ring (9). The limiting boss (8) and the stop ring (9) work together to limit the maximum height of the sleeve (11) to prevent the scraper (7) from detaching from the bottom flow of the slurry.

6. A center-driven thickener with adaptive scraper adjustment according to claim 5, characterized in that: A spring (10) is sleeved on the outer wall of the connecting rod (6). The spring (10) is located between the limiting boss (8) and the stop ring (9). One end of the spring (10) is fixedly connected to the limiting boss (8), and the end of the spring (10) away from the limiting boss (8) is slidably connected to the stop ring (9). A sealing cylinder (14) is sleeved on the spring (10). The limiting boss (8) is sealed to one end of the sealing cylinder (14), and the stop ring (9) slides inside the sealing cylinder (14).

7. A center-driven thickener with adaptive scraper adjustment according to claim 1, characterized in that: The scraper (7) is connected to an arc-shaped connecting block (15) at one end away from the central axis (3). The arc of the arc-shaped connecting block (15) is consistent with the outer wall of the sleeve (11). The arc-shaped connecting block (15) is provided with bolt holes. The end of the sleeve (11) is provided with multiple positioning holes (12). The bolt holes are bolted to different positioning holes (12) to adjust the initial deflection angle of the scraper (7).

8. A center-driven thickener with adaptive scraper adjustment according to claim 7, characterized in that: A sealing cap (13) is detachably connected to the positioning hole (12) to prevent mud and sand from entering the positioning hole (12).

9. A center-driven thickener with adaptive scraper adjustment according to claim 1, characterized in that: The bottom wall of the thickening tank (1) is conical, and the scraper (7) is provided with a wear-resistant rubber strip on one side edge near the bottom wall of the thickening tank (1).

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