A paste thickener discharge device with variable diameter screw and arch breaking fork

Abstract

The present application belongs to the technical field of paste thickener, especially a paste thickener discharge device with variable-diameter screw and arch breaking prong, aiming to solve the problems of insufficient separation of sediment and moisture, easy blockage of discharge port, poor concentration effect and insufficient ability to handle different thickness of sediment paste, the device comprises a conical sediment tank and its bottom discharge port, a rotating frame is arranged in the tank, the bottom of the rotating frame is provided with an angle-adjustable arc-shaped plow, which is used to guide the sediment paste to the discharge port, a shearing mechanism is arranged in the discharge port, the Y-shaped rod rotates while revolving to scatter the paste and prevent bridging, the concentration part comprises a conical conveying cylinder I and a conical conveying cylinder II which are connected in series, the paste is two-stage extruded and concentrated through gradually reduced space, the outlet end of the conical conveying cylinder II is provided with a conical head driven by hydraulic pressure, which can automatically extend to dredge when blocked, the device realizes continuous, stable and high-concentration discharge of the paste through multi-stage mechanical action.

Description

Technical Field

[0001] This invention relates to the field of paste thickener technology, and more particularly to a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork. Background Technology

[0002] Mines concentrate all tailings from the concentrator into a paste for full-scale tailings backfilling. This effectively improves the strength of the backfill, saves on binder usage, protects the underground working environment, and reduces backfilling mining costs. This represents the future development direction of mine backfilling. Currently, in the field of mine backfilling, tailings thickening typically uses ordinary deep cone thickeners to concentrate low-concentration tailings slurry into high-concentration tailings. After adding binder and mixing, the thickener is transported to the backfilling area. During the operation of the paste thickener, the discharge device is one of the core components, and its performance directly affects the thickener's separation efficiency, paste concentration effect, and the stability of continuous operation.

[0003] Existing paste thickener discharge devices mostly use a single screw conveyor structure for discharge, which has many shortcomings in practical applications:

[0004] 1. The lack of an effective pre-separation mechanism after the slurry enters the thickener results in poor initial separation of solid particles and liquid, leading to a heavy burden on subsequent concentration and low separation efficiency.

[0005] 2. The paste that settles to the bottom has a high concentration and high viscosity, and is prone to solidification or forming material arches near the discharge port, resulting in poor discharge or even complete blockage. To clear the discharge port, it is often necessary to stop the machine for manual cleaning, which affects continuous production. Some devices use stirring blades to prevent sedimentation, but simple stirring has limited shearing and crushing effect on high-viscosity pastes and is difficult to completely prevent the discharge port from being blocked.

[0006] 3. The concentration mechanism of existing equipment is mostly a single-channel conveyor, which is not strong enough to compress and concentrate the paste, resulting in a high water content in the discharged paste, which cannot meet the requirements of subsequent processing.

[0007] 4. In existing discharge devices, the scraping components are mostly set at a fixed angle. When the thickness of the precipitated paste in the conical settling tank changes, the contact area between the scraping component and the paste cannot be adjusted, which can easily lead to incomplete scraping or overload damage to the drive components due to excessive resistance. Summary of the Invention

[0008] The purpose of this invention is to solve the shortcomings of existing paste thickeners, such as insufficient separation of sediment and water, easy blockage of the discharge port, poor concentration effect, and insufficient ability to handle pastes of different thicknesses. The invention proposes a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A paste thickener discharge device with a variable diameter screw and an arch-breaking fork includes a conical settling tank. The bottom of the conical settling tank is provided with a discharge port. A gantry frame is fixed to the outer wall of the conical settling tank. A main shaft is rotatably connected to the top inner wall of the gantry frame, and the bottom end of the main shaft extends into the discharge port. Multiple rotating frames arranged radially are fixed to the outer wall of the main shaft. Multiple arc-shaped rakes are provided at the bottom of the multiple rotating frames. The bottom of the multiple arc-shaped rakes is in clearance fit with the bottom inner wall of the conical settling tank.

[0011] A connecting shaft is fixed to the bottom end of the main shaft, and a conical helical blade I is fixed to the bottom end of the connecting shaft.

[0012] The bottom of the conical sedimentation tank is fixedly connected to a conical conveying cylinder I, and the bottom end of the conical conveying cylinder I is fixedly connected to a conical conveying cylinder II. The conical spiral blade I is located inside the conical conveying cylinder I.

[0013] One possible design also includes a separation mechanism;

[0014] The separation mechanism includes a fixed ring I, a fixed ring II, a conical ring I, and a conical ring II. The fixed ring I is fixed to the top inner wall of the gantry frame via a connecting frame. The inner wall of the fixed ring I is connected to the outer wall of the fixed ring II via multiple supports I. The conical ring I is fixedly sleeved on the outer wall of the main shaft and located below the fixed ring II. A discharge gap I is formed between the bottom of the fixed ring II and the conical ring I. The inner wall of the fixed ring I is connected to the conical ring II via multiple supports II, and the conical ring II is located below the supports II. A discharge gap II is formed between the bottom of the fixed ring I and the conical ring II. The outer wall of the conical ring II is provided with a spiral groove. A feed pipe is fixedly inserted through the fixed ring I, and one end of the feed pipe extends into the fixed ring II and is tangentially engaged with the fixed ring II.

[0015] In one possible design, a shearing mechanism is provided inside the discharge port. The shearing mechanism includes a support platform, a rotating cylinder, a fixed mounting ring, a bevel gear ring, and multiple rotating disks. The support platform is fixed inside the discharge port by a crossbar. The bottom end of the connecting shaft rotatably passes through the support platform and is fixedly passed through the rotating cylinder. The fixed mounting ring is rotatably sleeved on the outer wall of the connecting shaft. The top end of the fixed mounting ring is fixedly connected to the bottom of the support platform. The bevel gear ring is fixedly sleeved on the outer wall of the fixed mounting ring. The outer wall of the rotating cylinder is sealed and rotatably passes through multiple rotating disks. Multiple vertical plates are fixed inside the rotating cylinder. A rotating shaft rotatably passes through each of the multiple vertical plates. A bevel gear that meshes with the bevel gear ring is fixed at one end of each of the multiple rotating shafts that is close to each other. The end of each rotating shaft away from the bevel gear is fixedly connected to the rotating disk. A Y-shaped rod is fixed on the side of each of the multiple rotating disks away from the rotating shaft.

[0016] In one possible design, a conveying shaft is rotatably connected inside the conical conveying cylinder II, and a conical spiral blade II is fixedly sleeved on the outer wall of the conveying shaft. A support plate is fixed inside the conical conveying cylinder II, and one end of the conveying shaft is rotatably connected to the support plate. A conical discharge nozzle is fixedly connected to the end of the conical conveying cylinder II near the support plate, and a clearing mechanism is provided at the end of the conical conveying cylinder II away from the conical discharge nozzle.

[0017] The unblocking mechanism includes a housing, a piston plate, an electric push rod I, and a conical head. The housing is fixed to the end of the conical conveying cylinder II. The piston plate slides and seals within the housing. Hydraulic oil is filled between the bottom of the piston plate and the bottom inner wall of the housing. The electric push rod I is fixed to the top of the housing, and its output shaft is fixedly connected to the top of the piston plate. The end of the conveying shaft away from the conical discharge nozzle passes through the conical conveying cylinder II and the housing and is located below the piston plate. A hydraulic chamber is provided inside the conveying shaft. Multiple hydraulic holes communicating with the hydraulic chamber are provided on the outer wall of the conveying shaft. The hydraulic holes are located inside the housing. A piston rod is slidably connected to the hydraulic chamber. One end of the piston rod slides through the support plate and is fixedly connected to the conical head.

[0018] In one possible design, the system further includes a lifting plate I, a lifting plate II, vertical rods, hydraulic cylinders, connecting rods, a movable plate, and a movable frame. The lifting plate I and the lifting plate II are slidably sleeved on the outer wall of the main shaft. Multiple vertical rods are fixed between the bottom of the lifting plate II and the top of the lifting plate I. Multiple hydraulic cylinders are fixed to the top inner wall of the conical ring II, and their output shafts are slidably connected to the top of the lifting plate II. Multiple connecting rods are rotatably connected to the bottom of the lifting plate I. The bottom ends of the multiple connecting rods are rotatably connected to the movable plate. The movable plate is slidably connected to the bottom of the rotating frame. Multiple movable frames are slidably connected to the bottom of the multiple rotating frames. One end of the movable plate is fixedly connected to the corresponding movable frame. The tops of the multiple arc-shaped plows are fixed with pins. The pins extend into the movable frames and slide in cooperation with the movable frames.

[0019] In one possible design, a hydraulic motor is fixed to the top of the gantry frame, and the output shaft of the hydraulic motor is connected to the top of the main shaft through a gearbox. A drive motor is fixed to the side of the housing away from the conical conveying cylinder II, and the output shaft of the drive motor is fixedly connected to one end of the conveying shaft.

[0020] In one possible design, a plurality of scrapers are fixed to the outer wall of the spindle, the scrapers being located inside the discharge port and conforming to the inner wall of the discharge port.

[0021] In one possible design, the top diameter of the conical helical blade I is larger than the bottom diameter, and the feed end diameter of the conical conveying cylinder II is larger than the discharge end diameter.

[0022] In one possible design, a connecting plate is fixed between two adjacent movable frames, and the connecting plate is slidably connected to the bottom of the rotating frame.

[0023] In one possible design, the bottom of each of the multiple rotating frames is fixed with multiple bases, and each of the multiple bases has a pin that rotatably passes through it. The multiple arc-shaped plows are respectively fixedly sleeved on the outer wall of the corresponding pin.

[0024] Beneficial effects: In this invention, the slurry enters the fixed ring II through a tangential fit between the feed pipe and the fixed ring II, and then flows spirally along the inner wall. Centrifugal force is used to achieve the initial separation of solid particles and liquid. Subsequently, the slurry falls onto the conical ring II through the discharge gap I, and continues to flow spirally under the guidance of the spiral groove. The centrifugal force is used to further throw out solid particles, which fall to the bottom of the conical sedimentation tank to form a paste, while the water remains in the upper layer and is discharged. This dual centrifugal separation structure can effectively improve the effect of the initial separation of slurry, reduce the processing load of the subsequent concentration mechanism, and improve the overall separation efficiency.

[0025] In this invention, the arc-shaped rake is connected to the rotating frame via components such as pins, rods, and a moving frame. Combined with driving components such as hydraulic cylinders, lifting discs, and connecting rods, the angle of the arc-shaped rake can be flexibly adjusted. When the thickness of the paste in the conical sedimentation tank increases, the contact area between the arc-shaped rake and the paste can be reduced, lowering the driving resistance and preventing overload damage to the driving components. When the paste thickness decreases, the contact area can be increased, ensuring thorough scraping. This structure allows the device to adapt to working conditions with different paste thicknesses, improving the device's adaptability and operational stability.

[0026] In this invention, the Y-shaped rod's revolution and rotation achieve sufficient shearing of the paste, breaking up any paste that may solidify and preventing it from solidifying and clogging the outlet. At the same time, the main shaft drives the scraper to rotate, scraping away the paste adhering to the inner wall of the outlet, further preventing blockage. In addition, a clearing mechanism is set at the conical outlet. When blockage occurs, the conical head can be hydraulically driven to move and automatically clear the blockage, eliminating the need for manual disassembly and cleaning. This effectively ensures the continuous and stable operation of the device and reduces maintenance costs.

[0027] In this invention, the concentration mechanism adopts a two-stage concentration structure consisting of a conical conveying cylinder I and a conical conveying cylinder II, both of which are variable diameter structures. The top diameter of the conical spiral blade I is larger than the bottom diameter, matching the variable diameter structure of the conical conveying cylinder I, and thus performing preliminary compression and concentration of the paste during the conveying process. The diameter of the conical spiral blade II matches the variable diameter structure of the conical conveying cylinder II, further compressing and concentrating the paste. The two-stage variable diameter spiral concentration structure can effectively increase the compression force on the paste, fully remove the moisture from the paste, reduce the water content of the discharged paste, and meet the requirements of subsequent processing.

[0028] In this invention, a separation mechanism is set up to achieve preliminary separation of solid particles and liquid in the slurry, reducing the burden of subsequent concentration and improving the overall separation efficiency. An adjustable-angle arc-shaped plow structure adapts to different paste thicknesses, avoiding overload damage to the drive components and ensuring thorough scraping. The dual action of the shearing mechanism and scraper prevents the paste from solidifying and clogging in the discharge port, and the unblocking mechanism automatically unblocks the conical discharge nozzle, ensuring continuous and stable operation of the device. A two-stage variable-diameter spiral concentration structure improves the paste concentration effect and reduces the water content of the discharged paste. The overall structure is compact, the transmission is stable and reliable, and the maintenance cost is low, effectively solving the problems of low separation efficiency, easy clogging, poor concentration effect, and high maintenance cost of existing paste thickener discharge devices. Attached Figure Description

[0029] Figure 1 A three-dimensional structural schematic diagram of a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork provided by the present invention.

[0030] Figure 2A three-dimensional cross-sectional view of a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork provided by the present invention.

[0031] Figure 3 A three-dimensional exploded view of the fixed ring I, fixed ring II, and conical ring II of a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork provided by the present invention.

[0032] Figure 4 A cross-sectional view of the fixed ring I and fixed ring II of a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork provided by the present invention.

[0033] Figure 5 A partial three-dimensional cross-sectional view of the conical conveying cylinder I and the fixing ring II of a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork provided by the present invention.

[0034] Figure 6 A three-dimensional exploded view of the scraper, support platform, and rotating cylinder of a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork provided by the present invention.

[0035] Figure 7 A three-dimensional exploded view of the rotating disk, bevel gear, and fixed mounting ring of a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork provided by the present invention.

[0036] Figure 8 A three-dimensional cross-sectional view of a conical conveying cylinder II with a variable diameter spiral and an arch-breaking fork provided by the present invention.

[0037] Figure 9 A partial three-dimensional cross-sectional view of the housing and conveyor shaft of a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork provided by the present invention.

[0038] Figure 10 A cross-sectional view of the conveyor shaft of a paste thickener discharge device with a variable diameter spiral and an arch-breaking fork provided by the present invention.

[0039] Figure 11 A three-dimensional structural diagram of the rotating frame, arc-shaped plow, and lifting disc II of a paste thickener discharge device with a variable diameter screw and an arch-breaking fork provided by the present invention.

[0040] Figure 12 A three-dimensional exploded structural diagram of the rotating frame, arc-shaped plow, and connecting rod of a paste thickener discharge device with a variable diameter screw and an arch-breaking fork provided by the present invention.

[0041] Figure 13 for Figure 12 Enlarged structural diagram at point A in the middle.

[0042] In the diagram: 1. Conical settling tank; 2. Gantry frame; 3. Fixed ring I; 4. Support I; 5. Fixed ring II; 6. Main shaft; 7. Conical ring I; 8. Discharge gap I; 9. Support II; 10. Conical ring II; 11. Discharge gap II; 12. Spiral groove; 13. Discharge port; 14. Scraper; 15. Support platform; 16. Feed pipe; 17. Rotating cylinder; 18. Fixed mounting ring; 19. Conical tooth ring; 20. Connecting shaft; 21. Vertical plate; 22. Rotating shaft; 23. Bevel gear; 24. Rotating disk; 25. Y-shaped rod; 26. Conical conveyor cylinder II; 27. Conveyor shaft; 28. Conical spiral groove. 29. Blade II; 30. Drive motor; 31. Conical discharge nozzle; 32. Support plate; 33. Hydraulic chamber; 34. Piston rod; 35. Conical head; 36. Hydraulic hole; 37. Box body; 38. Piston plate; 49. Electric push rod I; 40. Base; 41. Pin shaft; 42. Arc-shaped plow; 43. Pin rod; 44. Moving frame; 45. Connecting plate; 46. Moving plate; 47. Connecting rod; 48. Leaving groove; 49. Lifting plate I; 50. Vertical rod; 51. Lifting plate II; 52. Hydraulic cylinder; 53. Rotating frame; 54. Conical conveying cylinder I; 55. Conical spiral blade I; 56. Hydraulic motor. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0044] In one embodiment: Refer to Figure 1 , Figure 2 , Figure 4 and Figure 5A discharge device for a paste thickener with a variable diameter spiral and an arch-breaking fork is disclosed, relating to the field of paste thickener technology. It mainly includes a conical sedimentation tank 1, with a discharge port 13 at the bottom center of the conical sedimentation tank 1, and an upwardly protruding frustum-shaped or bowl-shaped collecting hopper at the bottom center of the conical sedimentation tank 1, with the discharge port 13 located at the lowest point of the collecting hopper. The scraping trajectory of the arc-shaped rake 41 covers the inclined surface of the hopper, smoothly guiding the paste into the discharge port 13. On the outer wall of the conical settling tank 1, a gantry frame 2 is firmly fixed. The gantry frame 2 is welded from steel profiles, and its structural strength is sufficient to support all subsequent transmission and execution components. A bearing seat is installed on the top inner wall of the gantry frame 2, and the main shaft 6 is rotatably connected through this bearing seat. The bottom end of the main shaft 6 extends downward and penetrates into the discharge port 13 at the bottom of the conical settling tank 1. A fixing ring I3 is also fixed to the top inner wall of the gantry frame 2 through a rigid connecting frame. The fixing ring I3 is a horizontally placed ring structure located in the upper area inside the conical settling tank 1.

[0045] Furthermore, referring to Figures 2-4 The fixed ring I3 has an internal separation mechanism for preliminary solid-liquid separation of the slurry. This mechanism mainly includes a fixed ring II5 and a conical ring I7. The fixed ring II5 is a circular ring with a diameter smaller than that of the fixed ring I3. It is connected to the inner wall of the fixed ring I3 by multiple supports I4. The supports I4 are evenly distributed along the circumference of the fixed ring I3, and their inner ends are welded to the outer wall of the fixed ring II5, thus suspending the fixed ring II5 at the center of the fixed ring I3. The conical ring I7 is fixedly sleeved on the outer wall of the main shaft 6, located directly below the fixed ring II5. The upper surface of the conical ring I7 is a conical surface with its large end facing down. An annular gap is maintained between the bottom edge of the fixed ring II5 and the conical surface of the conical ring I7. This gap is called the discharge gap I8. Multiple supports II9 are also fixed on the inner wall of the fixed ring I3. The supports II9 are also evenly arranged around the circumference. Their inner ends are connected to the outer wall of a conical ring II10. The conical ring II10 is rotatably sleeved on the outer wall of the main shaft 6 through bearings. It can rotate freely relative to the main shaft 6. The conical ring II10 is located below the supports II9. Its outer surface is a conical surface. An annular gap is also formed between the bottom edge of the fixed ring I3 and the upper part of the conical surface of the conical ring II10, which is called the discharge gap II11. A continuous spiral groove 12 is machined on the outer conical surface of the conical ring II10. The trajectory of the spiral groove 12 extends from the upper part of the conical ring II10 to the lower part. A feed pipe 16 passes through the side wall of the conical sedimentation tank 1 and the gantry 2 from the outside, and then is fixed through the fixed ring I3. The discharge port 13 of the feed pipe 16 extends into the interior of the fixed ring II5, and the axial direction of the discharge port 13 is tangent to the inner circumferential wall of the fixed ring II5.

[0046] Specifically, the paste to be processed is pumped in through the feed pipe 16. Since the feed pipe 16 is tangential to the inner wall of the fixed ring II5, the paste gains tangential velocity upon entering the fixed ring II5, forming a swirling flow along the inner wall of the fixed ring II5. The swirling paste moves downwards, and after reaching the bottom of the fixed ring II5, it flows out from the discharge gap I8 and spreads onto the conical surface of the lower conical ring I7. Under the guiding action of the conical ring I7, the paste is thrown to the surroundings, becoming thinner and more uniform. The paste then drips or flows onto the lower conical ring. On the conical ring II10, since the outer surface of the conical ring II10 is provided with a spiral groove 12, and when the main shaft 6 rotates, there is a relative motion tendency between the slurry and the surface of the conical ring II10. The slurry will spiral downward along the trajectory of the spiral groove 12. During this spiral flow process, the solid particles in the slurry are subjected to centrifugal force and are thrown towards the side wall of the conical sedimentation tank 1, and slide along the side wall to the bottom of the tank. The initially separated clarified liquid remains in the upper layer or overflows from the spiral groove 12. The solid particles gradually accumulate at the bottom of the tank to form a paste layer.

[0047] Furthermore, referring to Figures 5-7 Inside the discharge port 13 at the bottom of the conical settling tank 1, a shearing mechanism is provided. This mechanism is mainly used to prevent the paste from solidifying and caking on the inner wall of the discharge port 13 during the discharge process. A support platform 15 is fixed inside the discharge port 13 by a crossbar. A rotating cylinder 17 is rotatably connected to the bottom center of the support platform 15 via a bearing. A connecting shaft 20 is fixed to the bottom end of the main shaft 6. The bottom end of the connecting shaft 20 rotatably passes through the support platform 15 and through the bottom inner wall of the rotating cylinder 17. Inside the rotating cylinder 17, a fixing ring 18 is sleeved around the connecting shaft 20. The top end of the fixing ring 18 passes upward through the top of the rotating cylinder 17 and is fixedly connected to the bottom of the support platform 15. The fixing ring 18 itself is connected to the support platform 15 via a bearing. The rotating cylinder 17 achieves rotational sealing. A beveled ring 19 is fixedly sleeved on the outer wall of the fixed mounting ring 18. Multiple vertical plates 21 are fixed inside the rotating cylinder 17. Multiple rotating shafts 22 rotate through the vertical plates 21. For example, there are three rotating shafts 22. A bevel gear 23 is fixed at one end of each rotating shaft 22. All bevel gears 23 mesh with the central beveled ring 19. Multiple rotating disks 24 rotate through the side wall of the rotating cylinder 17 in a circumferential sealing manner. The outer end of the rotating shaft 22 is fixedly connected to the corresponding disc-shaped rotating disk 24. A Y-shaped rod 25 is fixedly installed on the side surface of each rotating disk 24 away from the rotating shaft 22. The Y-shaped rod 25 has multiple branches, which can expand its range of action.

[0048] Furthermore, referring to Figure 5 and Figure 6 In addition, multiple scrapers 14 are fixed on the bottom outer wall of the main shaft 6 by radial rods. The outer edge of the scraper 14 is in contact with the inner wall of the discharge port 13, which can scrape off the paste adhering to the inner wall.

[0049] Specifically, the paste scraped and fed above the discharge port 13 falls into the discharge port 13 under the action of gravity. When the main shaft 6 rotates, it drives the rotating cylinder 17 at the bottom to rotate through the connecting shaft 20. The rotating cylinder 17 drives multiple rotating shafts 22 and rotating disks 24 on it to revolve. Since the bevel gear 23 at the inner end of the rotating shaft 22 meshes with the fixed bevel gear ring 19, the bevel gear 23 will rotate on its own axis while revolving, thereby driving the rotating shaft 22 and rotating disk 24 to rotate on their own axes. Finally, the paste is fixed on the rotating shaft 22. The Y-shaped rod 25 on the moving plate 24 revolves and rotates within the discharge port 13, forming a complex motion trajectory. The Y-shaped rod 25 acts like a fork, shearing, breaking up, and stirring the falling paste, effectively preventing the paste from forming material arches or adhering to the wall within the discharge port 13. At the same time, the scraper 14 on the main shaft 6 rotates with the main shaft 6, continuously scraping off any thin layer of paste that may adhere to the inner wall of the discharge port 13. The broken paste falls into the conical conveyor cylinder I 53.

[0050] Furthermore, referring to Figure 2 , Figure 5 , Figure 8 and Figure 10 The discharge device also includes a concentration mechanism for secondary compression and concentration of the discharged paste. The concentration mechanism mainly includes a conical conveyor cylinder I 53 and a conical conveyor cylinder II 26. The upper end of the conical conveyor cylinder I 53 is fixedly connected to the discharge port 13 at the bottom of the conical sedimentation tank 1. The diameter of the conical conveyor cylinder I 53 gradually decreases from top to bottom, forming an inverted cone shape. At the bottom end of the connecting shaft 20, a conical spiral blade I 54 is fixed. The outer edge of the conical spiral blade I 54 maintains a tight clearance fit with the inner wall of the conical conveyor cylinder I 53. The top diameter of the conical spiral blade I 54 is larger, and the bottom diameter is smaller. Its pitch can also be designed to gradually decrease from top to bottom, forming a variable diameter, variable pitch structure. The bottom of the conical conveyor cylinder I 53... The upper end of the conical conveyor cylinder II26 is fixedly connected to the upper end of the conical sedimentation tank 1 via an independent frame. The interior of the conical conveyor cylinder II26 is also conical, with a larger diameter at the feed end and a smaller diameter at the discharge end. A conveyor shaft 27 is rotatably connected inside the conical conveyor cylinder II26. A conical spiral blade II28 is fixedly sleeved on the outer wall of the conveyor shaft 27. The outer edge of the conical spiral blade II28 fits with the inner wall of the conical conveyor cylinder II26. A conical discharge nozzle 30 is fixedly connected to the discharge end of the conical conveyor cylinder II26. A support plate 31 is fixedly located inside the conical conveyor cylinder II26 near the discharge end. One end of the conveyor shaft 27 is rotatably connected to the support plate 31 via a bearing.

[0051] Specifically, the conical spiral blade I54 at the bottom of the connecting shaft 20 rotates at high speed with the connecting shaft 20. As the diameter of the conical conveying cylinder I53 gradually decreases downward, and the diameter and pitch of the conical spiral blade I54 also change accordingly, the paste is gradually compressed in space during the downward conveying process, and is subjected to strong squeezing and shearing action. Some water is squeezed out and may flow back upward. The paste enters the conical conveying cylinder II26 under the push of the conical spiral blade I54. The drive motor 29 drives the conveying shaft 27 and the conical spiral blade II28 to rotate. The diameter of the conical conveying cylinder II26 gradually decreases from the feed end to the discharge end. Therefore, the paste continues to be squeezed under the push of the conical spiral blade II28, the concentration is further increased, and finally it is compacted and discharged continuously and stably from the conical discharge nozzle 30.

[0052] Furthermore, referring to Figures 8-10 At the end of the conical conveyor cylinder II 26 away from the conical discharge nozzle 30, a clearing mechanism is provided. This mechanism includes a housing 36 fixed to the end of the conical conveyor cylinder II 26. A piston plate 37 is slidably connected inside the housing 36, dividing the interior of the housing 36 into upper and lower chambers. The lower chamber is filled with hydraulic oil. An electric push rod I 38 is fixedly installed on the top of the housing 36. The output shaft of the electric push rod I 38 extends downward into the housing 36 and is fixedly connected to the top center of the piston plate 37. The end of the conveying shaft 27 away from the conical discharge nozzle 30 passes through the end plate of the conical conveyor cylinder II 26 and the side plate of the housing 36 in sequence. A double-end mechanical seal assembly is installed at each penetration point. The stationary ring of the mechanical seal assembly is fixedly connected to the conical conveyor cylinder II 26 and the housing 36, and the moving ring is fixedly connected to the conveying shaft 27. The sealing chamber of the mechanical seal assembly is filled with hydraulic oil. The grease provides a reliable seal between the conveyor shaft 27 and the housing, preventing hydraulic oil leakage and the intrusion of grease impurities. The conveyor shaft 27 is a hollow shaft with a hydraulic chamber 32 inside. Multiple hydraulic holes 35 are provided on the outer wall of the section of the conveyor shaft 27 located inside the housing 36. The hydraulic holes 35 connect the lower cavity of the housing 36 with the hydraulic chamber 32 inside the conveyor shaft 27. Inside the hydraulic chamber 32 of the conveyor shaft 27, a piston rod 33 is slidably connected. One end of the piston rod 33 slides through the seal inside the conveyor shaft 27 and the support plate 31 inside the conical conveyor cylinder II 26. A conical head 34 is fixed at its end. A lip seal is provided in the through hole of the support plate 31. The piston rod 33 and the lip seal are slidably sealed together. The exposed end of the piston rod 33 is fixedly connected to the conical head 34. The shape of the conical head 34 is adapted to the inner cavity shape of the conical discharge nozzle 30.

[0053] Specifically, when the conical discharge nozzle 30 becomes clogged due to unforeseen circumstances such as temporary shutdown or sudden change in the properties of the paste, the unblocking mechanism is activated. The control system commands the electric push rod I 38 to move, and its output shaft pushes the piston plate 37 downward. The piston plate 37 compresses the hydraulic oil in the lower cavity of the housing 36, forcing the hydraulic oil to enter the hydraulic chamber 32 inside the conveying shaft 27 through the hydraulic hole 35 on the conveying shaft 27. The pressure of the hydraulic oil pushes the piston rod 33 in the hydraulic chamber 32 to move towards the discharge end. The piston rod 33 drives the conical head 3 at its end. 4. Extend forward, pass through the hole on the support plate 31, and directly insert into the blocked conical discharge nozzle 30. The conical surface of the conical head 34 wedges into the material arch or the initially compacted paste, destroying its structure and clearing the blockage, thereby clearing the outlet. After clearing, the electric push rod I 38 retracts, the piston plate 37 rises, and a negative pressure is formed in the lower cavity of the box 36. At the same time, the pressure of the paste on the conical head 34 may also assist its retraction. The hydraulic oil flows back to the box 36, and the conical head 34 retracts into the conveying shaft 27, restoring the normal conveying state.

[0054] Furthermore, referring to Figure 2 and Figure 8 To drive the entire device, a hydraulic motor 55 is mounted on the top of the gantry 2 via a frame. The output shaft of the hydraulic motor 55 is connected to a gearbox, and the output shaft of the gearbox is fixedly connected to the top of the main shaft 6 via a coupling, providing power for the rotation of the main shaft 6. On the side of the housing 36 away from the conical conveyor cylinder II 26, a drive motor 29 is mounted via another frame. The output shaft of the drive motor 29 is fixedly connected to the extended end of the conveyor shaft 27 via a coupling, for driving the conveyor shaft 27 and the conical spiral blade II 28 to rotate.

[0055] In another embodiment: Refer to Figures 11-13At the bottom of the conical sedimentation tank 1, multiple radially arranged rotating frames 52 are fixed on the main shaft 6. The number of rotating frames 52 can be selected according to the diameter of the sedimentation tank, for example, three or four. These rotating frames 52 are evenly distributed along the circumference of the main shaft 6. Multiple arc-shaped rakes 41 are installed at the bottom of each rotating frame 52. The bottom edge of the arc-shaped rake 41 maintains a small gap fit with the inner wall of the bottom of the conical sedimentation tank 1. This gap is small enough to ensure that the deposited paste can be scraped off, but without hard friction with the bottom of the tank. The arc-shaped rakes 41 are mounted on the rotating frame 52 through an angle adjustment mechanism. Specifically, multiple bases 39 are fixed at the bottom of the rotating frame 52. Each of the multiple bases 39 has a pin 40 that rotates through it via rolling bearings. Sealed end caps are provided at both ends of the bearings. A sealing ring is provided between the sealing end cap and the pin 40 to prevent paste impurities from entering the bearing. The back of the arc-shaped plow 41 is fixedly sleeved on the corresponding pin 40. A pin 42 extending upward is fixed on the top of the arc-shaped plow 41. A rectangular moving frame 43 is slidably connected to the bottom guide rail of the rotating frame 52. The upper end of the pin 42 is inserted into a long strip groove inside the moving frame 43 to achieve a sliding fit. When the moving frame 43 slides radially along the rotating frame 52, the arc-shaped plow 41 can be forced to rotate around its pin 40 through the fit between the pin 42 and the groove, thereby changing the angle between its bottom scraper 14 and the bottom plane of the tank. All the moving frames 43 on the same rotating frame 52 are connected to each other as a whole through the connecting plate 44. The connecting plate 44 is also slidably connected to the bottom of the rotating frame 52.

[0056] Reference Figure 4 , Figure 7 and Figure 12The main shaft 6 is fitted with a lifting plate I 48 and a lifting plate II 50. The lifting plate II 50 is located above the lifting plate I 48. The inner walls of the lifting plates I 48 and II 50 are equipped with wear-resistant sealing rings. The main shaft 6 slides with the sealing rings to form a sealing structure, preventing paste impurities from entering the sliding gap. The two are rigidly connected by multiple vertical rods 49. Multiple hydraulic cylinders 51 are evenly fixed to the inner top of the conical ring II 10 along its circumference. The output end of the hydraulic cylinder 51 is vertically downward, and a sliding block is fixed to the bottom end of the output shaft. The top of the lifting plate II 50 is provided with an annular slide rail that matches the sliding block. The sliding block is slidably embedded in the annular slide rail. The hydraulic cylinder 51 output shaft is slidably connected to the lifting plate II 50. The bottom of the lifting plate I 48 is rotatably connected to multiple connecting rods 46 via hinges. The number of connecting rods 46 corresponds to the number of rotating frames 52. The bottom end of each connecting rod 46 is connected to a movable plate 45 via another hinge. The movable plate 45 is slidably connected to a sliding guide rail with a dust cover at the bottom of the rotating frame 52. The movable plate 45 is slidably connected to the sliding guide rail via a slider. The dust cover is placed on the outside of the guide rail to isolate paste impurities. The end of the movable plate 45 away from the connecting rod 46 is fixedly connected to the corresponding movable frame 43. A clearance groove 47 is provided on the rotating frame 52 to provide space for the swing of the connecting rod 46.

[0057] Specifically, the hydraulic motor 55 drives the main shaft 6 to rotate slowly via the gearbox. The main shaft 6 drives the rotating frame 52 and the arc-shaped rake 41 on it to rotate together. The bottom of the arc-shaped rake 41 scrapes the surface of the paste deposited at the bottom of the tank at a set angle, slowly pushing the paste towards the central discharge port 13. When the deposited paste layer becomes thicker or its properties change, causing an increase in rotational resistance, the control system can activate the hydraulic cylinder 51. The output shaft of the hydraulic cylinder 51 pushes the lifting plate II 50 to move downward. The lifting plate II 50 drives the lifting plate I 48 to move downward synchronously via the vertical rod 49. When the lifting plate I 48 moves downward, it pushes the moving plate 45 along the rotating frame 52 via the connecting rod 46. Sliding radially outward, the moving plate 45 drives the connecting plate 44 and all the moving frames 43 to move outward together. The movement of the moving frame 43, through the cooperation of its internal sliding groove and pin 42, forces the arc-shaped rake 41 to rotate around its pin shaft 40, thereby reducing the angle between its bottom scraper 14 and the horizontal plane, that is, making the rake "lift" an angle. This reduces the contact area between the arc-shaped rake 41 and the paste layer, and the amount of paste scraped is reduced accordingly, thereby reducing the rotational resistance and protecting the transmission components. When the resistance returns to normal, the hydraulic cylinder 51 retracts, and under the action of the tension spring, the moving frame 43 resets inward, driving the arc-shaped rake 41 to rotate back to its original working angle.

[0058] Dustproof seals (such as rubber sealing rings) are provided at the sliding connections between the movable plate 45 and the rotating frame 52, the sliding connections between the movable frame 43 and the rotating frame 52, and the rotating connections between the pin 40 and the base 39 to prevent the intrusion of paste particles. Furthermore, this device requires periodic shutdowns for cleaning and lubrication of the aforementioned moving parts to ensure the long-term reliability of its adjustment function.

[0059] This device also includes a PLC controller (the model is for example only and is not limited to this one), which is electrically connected to the hydraulic motor 55, the drive motor 29, all hydraulic cylinders 51, and the electric push rod I 38; the PLC controller has preset control logic:

[0060] 1. When the hydraulic motor 55 drives the main shaft 6 to rotate, the drive motor 29 starts synchronously to drive the conical spiral blade II 28 to rotate, with the speed ratio set to 1:1.2~1:1.5;

[0061] 2. The pressure of the paste at the bottom of the conical sedimentation tank 1 is detected by a pressure sensor. When the pressure value exceeds the preset threshold, the PLC controller controls the hydraulic cylinder 51 to adjust the angle of the arc-shaped plow 41.

[0062] 3. The discharge flow rate of the conical discharge nozzle 30 is detected by the flow sensor. When the flow rate is lower than the preset threshold of 10%, the PLC controller triggers the electric push rod I38 to start the unblocking mechanism.

[0063] To ensure the long-term stable operation of this device, it is recommended to clean and lubricate the inner wall of the conical sedimentation tank 1, the arc-shaped rake 41, and all sliding and rotating connecting parts (such as the moving frame 43 and the pin 40) regularly (e.g., every 500 hours of operation), and to check the wear of the shearing mechanism and the concentration screw.

[0064] A method for using a paste thickener discharge device with a variable diameter screw and an arch-breaking fork includes the following steps:

[0065] S1. The paste slurry is injected into the fixed ring II5 through the feed pipe 16. Since the feed pipe 16 is tangentially fitted with the fixed ring II5, the slurry flows spirally downward along the inner wall of the fixed ring II5 and disperses downward under the action of the conical ring I7. It falls onto the conical ring II10 through the discharge gap I8. Due to the spiral groove 12 provided on the conical ring II10, the slurry flows spirally downward along the spiral groove 12. During the spiral descent, the sediment in the slurry can be thrown out under the action of centrifugal force, thus initially separating the sediment from the water.

[0066] S2. The hydraulic motor 55 drives the main shaft 6 to rotate the rotating frame 52. The rotating frame 52 drives the arc-shaped plow 41 to rotate slowly to stir the slurry. The slurry undergoes gravity sedimentation in the conical sedimentation tank 1. Solid particles, due to their higher density, settle to the bottom of the tank to form a precipitated paste. Water, due to its lower density, floats upward and is located above the precipitated paste. As the slurry is injected, the sediment and water separate. The water at the top squeezes the precipitated paste, thereby increasing the density of the paste. During the rotation of the rotating frame 52, the arc-shaped plow 41 can scrape the precipitated paste into the discharge port 13.

[0067] S3. The main shaft 6 drives the scraper 14 to rotate in the discharge port 13 to prevent the precipitated paste from being compressed and solidified in the discharge port 13, which would cause the discharge port 13 to be blocked. Then, the main shaft 6 drives the rotating cylinder 17 and the conical spiral blade I 54 to rotate through the connecting shaft 20. The rotating cylinder 17 drives the Y-shaped rod 25 to revolve, and the bevel gear 23 meshes with the bevel gear ring 19. Therefore, during the operation, the rotating disk 24 drives the Y-shaped rod 25 to rotate in the discharge port 13 to disperse the compressed precipitated paste, so that the conical spiral blade I 54 can transport the paste along the conical conveying cylinder I 53 to the conical conveying cylinder II 26 later. Since the top diameter of the conical spiral blade I 54 is larger than the bottom diameter, it further concentrates the precipitated paste.

[0068] S4. The drive motor 29 drives the conveying shaft 27 to rotate the conical spiral blade II 28. The diameter of the left side of the conical conveying cylinder II 26 is larger than that of the right side, so the paste can be squeezed and concentrated again during the conveying of the precipitated paste. When the paste in the conical discharge nozzle 30 solidifies and becomes blocked, the output end of the electric push rod I 38 drives the piston plate 37 to move down, injecting the hydraulic oil in the box 36 into the hydraulic chamber 32 through the hydraulic hole 35. The hydraulic oil pushes the piston rod 33 and the conical head 34 to move outward and extend into the conical discharge nozzle 30 to clear the conical discharge nozzle 30.

[0069] S5. When the thickness of the precipitated paste in the conical sedimentation tank 1 gradually increases, causing the rotating frame 52 to drive the arc-shaped rake 41 to scrape the paste, in order to avoid damage to the rotating frame 52 and the hydraulic motor 55, the output end of the hydraulic cylinder 51 drives the lifting plate II 50, the vertical rod 49 and the lifting plate I 48 to move down as a whole. The lifting plate I 48 drives the moving plate 45, the connecting plate 44 and the moving frame 43 to move away from the main shaft 6 through the connecting rod 46. The moving frame 43 drives the arc-shaped rake 41 to rotate through the cooperation of the pin 42, adjusts the rotation angle of the arc-shaped rake 41, thereby reducing the contact area between the arc-shaped rake 41 and the precipitated paste, and reducing the amount of paste scraped by the arc-shaped rake 41 during rotation.

[0070] However, as is well known to those skilled in the art, the working principles and wiring methods of the hydraulic cylinder 51, electric push rod I 38, drive motor 29 and hydraulic motor 55 are all conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0071] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0072] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A paste thickener discharge device with a variable diameter spiral and an arch-breaking fork, comprising a conical settling tank (1), characterized in that, The conical sedimentation tank (1) has a discharge port (13) at the bottom. A gantry frame (2) is fixed to the outer wall of the conical sedimentation tank (1). A main shaft (6) is rotatably connected to the top inner wall of the gantry frame (2), and the bottom end of the main shaft (6) extends into the discharge port (13). A plurality of rotating frames (52) arranged radially are fixed to the outer wall of the main shaft (6). A plurality of arc-shaped rakes (41) are provided at the bottom of the plurality of rotating frames (52). The bottom of the plurality of arc-shaped rakes (41) is in clearance fit with the bottom inner wall of the conical sedimentation tank (1). The bottom end of the main shaft (6) is fixed with a connecting shaft (20), and the bottom end of the connecting shaft (20) is fixed with a conical spiral blade I (54). The bottom of the conical sedimentation tank (1) is fixedly connected to a conical conveying cylinder I (53), and the bottom end of the conical conveying cylinder I (53) is fixedly connected to a conical conveying cylinder II (26). The conical spiral blade I (54) is located inside the conical conveying cylinder I (53).

2. The discharge device for a paste thickener with a variable diameter screw and an arch-breaking fork according to claim 1, characterized in that, It also includes a separation mechanism; The separation mechanism includes a fixed ring I (3), a fixed ring II (5), a conical ring I (7), and a conical ring II (10). The fixed ring I (3) is fixed to the top inner wall of the gantry frame (2) by a connecting frame. The inner wall of the fixed ring I (3) is connected to the outer wall of the fixed ring II (5) by multiple brackets I (4). The conical ring I (7) is fixedly sleeved on the outer wall of the main shaft (6) and located below the fixed ring II (5). A discharge gap I (8) is formed between the bottom of the fixed ring II (5) and the conical ring I (7). The inner wall of the fixed ring I (3) is connected to the conical ring II (10) through multiple brackets II (9), and the conical ring II (10) is located below the brackets II (9). A discharge gap II (11) is formed between the bottom of the fixed ring I (3) and the conical ring II (10). The outer wall of the conical ring II (10) is provided with a spiral groove (12). A feed pipe (16) is fixedly inserted inside the fixed ring I (3). One end of the feed pipe (16) extends into the fixed ring II (5) and is tangentially engaged with the fixed ring II (5).

3. The discharge device for a paste thickener with a variable diameter screw and an arch-breaking fork according to claim 2, characterized in that, The discharge port (13) is equipped with a shearing mechanism, which includes a support platform (15), a rotating cylinder (17), a fixed mounting ring (18), a bevel gear ring (19), and multiple rotating disks (24). The support platform (15) is fixed inside the discharge port (13) by a crossbar. The bottom end of the connecting shaft (20) rotates through the support platform (15) and is fixedly inserted through the rotating cylinder (17). The fixed mounting ring (18) is rotatably sleeved on the outer wall of the connecting shaft (20). The top end of the fixed mounting ring (18) is fixedly connected to the bottom of the support platform (15). The bevel gear ring (19) is fixedly sleeved on the outer wall of the connecting shaft (20). On the outer wall of the fixed mounting ring (18), the outer wall of the rotating cylinder (17) is sealed and rotates through multiple rotating disks (24). Multiple vertical plates (21) are fixed inside the rotating cylinder (17). Rotating shafts (22) rotate through each of the multiple vertical plates (21). A bevel gear (23) that meshes with the bevel ring (19) is fixed at one end of each of the multiple rotating shafts (22). The end of the rotating shaft (22) away from the bevel gear (23) is fixedly connected to the rotating disk (24). A Y-shaped rod (25) is fixed on one side of each of the multiple rotating disks (24) away from the rotating shaft (22).

4. The discharge device for a paste thickener with a variable diameter screw and an arch-breaking fork according to claim 3, characterized in that, The conical conveying cylinder II (26) is rotatably connected to a conveying shaft (27). A conical spiral blade II (28) is fixedly sleeved on the outer wall of the conveying shaft (27). A support plate (31) is fixed inside the conical conveying cylinder II (26). One end of the conveying shaft (27) is rotatably connected to the support plate (31). A conical discharge nozzle (30) is fixedly connected to one end of the conical conveying cylinder II (26) near the support plate (31). A clearing mechanism is provided at one end of the conical conveying cylinder II (26) away from the conical discharge nozzle (30). The unblocking mechanism includes a housing (36), a piston plate (37), an electric push rod I (38), and a conical head (34). The housing (36) is fixed to the end of the conical conveying cylinder II (26). The piston plate (37) slides sealed within the housing (36). Hydraulic oil is filled between the bottom of the piston plate (37) and the bottom inner wall of the housing (36). The electric push rod I (38) is fixed to the top of the housing (36), and its output shaft is fixedly connected to the top of the piston plate (37). The conveying shaft (27) is located away from the conical head. One end of the nozzle (30) is sealed and rotates through the conical conveying cylinder II (26) and the box (36) and is located below the piston plate (37). The conveying shaft (27) is provided with a hydraulic chamber (32). The outer wall of the conveying shaft (27) is provided with a plurality of hydraulic holes (35) communicating with the hydraulic chamber (32). The hydraulic holes (35) are located in the box (36). The hydraulic chamber (32) is sealed and slidably connected with a piston rod (33). One end of the piston rod (33) slides through the support plate (31) and is fixedly connected to the conical head (34).

5. A paste thickener discharge device with a variable diameter screw and an arch-breaking fork according to claim 4, characterized in that, It also includes lifting plate I (48), lifting plate II (50), vertical rods (49), hydraulic cylinders (51), connecting rods (46), moving plate (45), and moving frame (43). The outer wall of the main shaft (6) is slidably fitted with the lifting plate I (48) and the lifting plate II (50). Multiple vertical rods (49) are fixed between the bottom of the lifting plate II (50) and the top of the lifting plate I (48). Multiple hydraulic cylinders (51) are fixed to the top inner wall of the conical ring II (10), and their output shafts are slidably connected to the top of the lifting plate II (50). The lifting plate I (48) is slidably fitted with the lifting plate I (48), the lifting plate II (50), the vertical rods (49), the hydraulic cylinders (41), the connecting rods (46), the moving plate (45), and the moving frame (43). 8) is rotatably connected to the bottom of a plurality of connecting rods (46), and the bottom ends of the plurality of connecting rods (46) are rotatably connected to the movable plate (45). The movable plate (45) is slidably connected to the bottom of the rotating frame (52). The bottom of the plurality of rotating frames (52) is slidably connected to a plurality of movable frames (43). One end of the movable plate (45) is fixedly connected to the corresponding movable frame (43). The top of the plurality of arc-shaped plows (41) is fixed with pins (42). The pins (42) extend into the movable frame (43) and slide in cooperation with the movable frame (43).

6. A paste thickener discharge device with a variable diameter screw and an arch-breaking fork according to claim 5, characterized in that, A hydraulic motor (55) is fixed to the top of the gantry (2). The output shaft of the hydraulic motor (55) is connected to the top of the main shaft (6) through a gearbox. A drive motor (29) is fixed to the side of the housing (36) away from the conical conveying cylinder II (26). The output shaft of the drive motor (29) is fixedly connected to one end of the conveying shaft (27).

7. A paste thickener discharge device with a variable diameter spiral and an arch-breaking fork according to claim 6, characterized in that, Multiple scrapers (14) are fixed on the outer wall of the main shaft (6). The scrapers (14) are located inside the discharge port (13) and are in contact with the inner wall of the discharge port (13).

8. A paste thickener discharge device with a variable diameter screw and an arch-breaking fork according to claim 7, characterized in that, The top diameter of the conical spiral blade I (54) is greater than the bottom diameter, and the feed end diameter of the conical conveying cylinder II (26) is greater than the discharge end diameter.

9. A paste thickener discharge device with a variable diameter screw and an arch-breaking fork according to claim 8, characterized in that, A connecting plate (44) is fixed between two adjacent movable frames (43), and the connecting plate (44) is slidably connected to the bottom of the rotating frame (52).

10. A paste thickener discharge device with a variable diameter screw and an arch-breaking fork according to claim 9, characterized in that, Each of the multiple rotating frames (52) has multiple bases (39) fixed at its bottom. Each of the multiple bases (39) has a pin (40) rotatably passing through it. Each of the multiple arc-shaped plows (41) is fixedly sleeved on the outer wall of the corresponding pin (40).

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