Chemical pulp slurry extraction device with anti-blocking structure

Abstract

The application relates to a chemical pulp slurry extraction device with an anti-blocking structure and belongs to the technical field of slurry production; a No. 1 driving shaft is rotatably arranged on the bottom wall of an extraction tank through a bearing, the upper end of the No. 1 driving shaft is fixedly provided with a sieve cylinder, the sieve cylinder is located at the inner side position of the extraction tank, the lower end of a No. 2 driving shaft is rotatably connected with a support frame through a bearing, the extraction tank is provided with a cleaning assembly connected with the No. 2 driving shaft, the No. 2 driving shaft is provided with an anti-blocking cleaning assembly connected with the sieve cylinder, the extraction tank is provided with a residue discharging assembly connected with the anti-blocking cleaning assembly, the centrifugal force can be utilized to realize dynamic and efficient separation of the slurry, the internal coaxial screw frame and the scraping rod can continuously self-clean under differential rotation, impurities can be timely peeled off and discharged, the sieve hole is ensured to be unobstructed, the synchronous and continuous operation of separation, cleaning and residue discharging is realized, the shutdown and blockage cleaning frequency is reduced, the slurry extraction efficiency and stability are improved, and the energy consumption and maintenance cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of slurry production technology, specifically to a chemical mechanical slurry extraction device with an anti-clogging structure. Background Technology

[0002] In the production of chemimechanical pulp, pulp extraction and screening are crucial steps that determine the efficiency of subsequent processes and the quality of the pulp. Currently, most widely used extraction devices are based on pressure screen structures. Their core relies on the pressure difference provided by the feed pump to force the pulp through a fixed screen drum or screen plate to separate fibers from impurities. These traditional devices have revealed several inherent defects in long-term operation: First, the separation process is passive filtration. Under pressure, fibers and impurities are easily compacted and firmly adhered to the screen surface, forming a dense filter cake layer, which leads to rapid clogging of the screen holes and a sharp drop in separation efficiency. Second, traditional devices rely on high-pressure feeding, and energy consumption is mainly used to overcome filtration resistance, resulting in low energy utilization. Moreover, frequent shutdowns for manual cleaning or disassembly are required to clear blockages, which seriously restricts the continuity and stability of production and increases maintenance costs. Therefore, there is an urgent need for a chemimechanical pulp extraction device with an anti-clogging structure. Summary of the Invention

[0003] The purpose of this invention is to address the deficiencies and shortcomings of the prior art by providing a reasonably designed and easy-to-use chemical slurry extraction device with an anti-clogging structure, thereby solving the aforementioned problems.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: it includes an extraction tank and a support frame, with the extraction tank fixedly installed on the upper part of the support frame; It also includes: The first drive shaft is rotatably mounted on the bottom wall of the extraction tank via a bearing. A sieve cylinder is fixedly installed at the upper end of the first drive shaft, and the sieve cylinder is located inside the extraction tank. The second drive shaft is rotatably inserted into the first drive shaft via a bearing. The lower end of the second drive shaft is rotatably connected to the support frame via a bearing. The extraction tank is equipped with a cleaning assembly connected to the second drive shaft. The second drive shaft is equipped with an anti-clogging cleaning assembly connected to the screen cylinder. The extraction tank is equipped with a slag discharge assembly connected to the anti-clogging cleaning assembly. Through the above technical solution, the No. 1 drive shaft and the No. 2 drive shaft are arranged in a nested coaxial manner, which realizes a high degree of integration of power transmission and space optimization. At the same time, combined with the cleaning component, anti-clogging cleaning component and slag discharge component, it can also achieve good cleaning, anti-clogging and slag discharge in the equipment.

[0005] Preferably, the cleaning assembly comprises: The water supply pipe is fixedly inserted into the top of the extraction tank. The second drive shaft has a hollow structure inside. The lower end of the water supply pipe is connected to the second drive shaft through a rotary joint. One-way valves, there are several one-way valves, which are respectively fixedly installed in several water outlet holes opened on the outer ring wall of the second drive shaft, and the water outlet holes are connected to the inside of the second drive shaft; By using the above technical solution, the hollow No. 2 drive shaft is used as a high-pressure water supply channel, and combined with a rotary joint and a one-way valve, online and directional high-pressure hydraulic cleaning of the working area inside the screen cylinder is realized.

[0006] Preferably, the anti-clogging and cleaning component comprises: The spiral frame is movably installed inside the screen cylinder and is connected to the slag discharge assembly. Several connecting rods are fixedly installed on the second drive shaft at a position inside the screen cylinder, and the spiral frame is fixedly connected to the other end of the several connecting rods. The motor is fixedly mounted on the support frame, and the output shaft of the motor is connected to the first drive shaft and the second drive shaft through a differential gear set. Through the above technical solution, the No. 1 drive shaft and the No. 2 drive shaft driven by the differential gear set can respectively control the high-speed rotation of the screen cylinder and the low-speed rotation of the screw frame, so that the screw frame blades generate a continuous scraping and pushing effect relative to the inner wall of the screen cylinder. While achieving efficient centrifugal separation, dynamic self-cleaning of the inner wall of the screen and stable axial conveying of coarse slag are realized, preventing screen hole blockage and material accumulation.

[0007] Preferably, the bottom of the screen cylinder is a conical structure, and a scraper rod is movably abutting on the bottom wall of the screen cylinder, and the scraper rod is fixedly mounted on the drive shaft. Through the above technical solution, the conical structure at the bottom of the screen cylinder facilitates the movement of the slurry to the outside of the screen cylinder, and the No. 1 scraper rod, which rotates slowly with the No. 2 drive shaft, can prevent material accumulation on the bottom wall of the screen cylinder, thus ensuring the continuous and smooth flow of materials.

[0008] Preferably, the first drive shaft has several reinforcing ribs with equal rounded corners, and the reinforcing ribs are fixedly installed at the bottom of the screen cylinder; Through the above technical solution, the reinforcing ribs form a stable rigid support structure between the No. 1 drive shaft and the bottom of the screen cylinder, which enhances the mechanical strength of the connection between the bottom of the screen cylinder and the No. 1 drive shaft, effectively resists the huge torque and vibration generated by the screen cylinder when it rotates at high speed, and improves the structural reliability and service life of the core transmission components.

[0009] Preferably, the slag discharge assembly comprises: A guide ring is fixedly installed inside the extraction tank and is rotatably sleeved on the screen cylinder via a bearing. The second scraper is movably abutting on the guide ring and is fixedly mounted on the screw frame. A slag outlet is provided on the ring side wall of the extraction tank at the position above the guide ring on the right side. A slag hopper that matches the slag outlet is fixedly provided on the right side of the extraction tank. Through the above technical solution, the fixed guide ring and the rotating No. 2 scraper bar cooperate to provide an efficient discharge path for the coarse slag lifted by the screw frame. The No. 2 scraper bar continuously scrapes the slag accumulated on the guide ring to the slag outlet, realizing the synchronous automation of "solid-liquid separation" and "dry slag discharge", ensuring the continuity and stability of the slag discharge process, and avoiding secondary mixing or accumulation of slag in the separation zone.

[0010] Preferably, the guide ring is an inclined structure with the outer edge pointing downwards, and the second scraper is inclined to cooperate with the outer edge of the guide ring; Through the above technical solution, the inclined structure of the guide ring and the inclined setting of the No. 2 scraper bar work together to form an optimized combination of directional guidance and pushing, so that the slag can slide more smoothly and thoroughly to the slag outlet under the dual action of gravity and scraping force, thereby improving slag discharge efficiency and cleanliness.

[0011] Preferably, a rotating ring is movably arranged in the annular groove at the bottom of the guide ring, and two No. 3 scraper rods are fixedly arranged at the bottom of the rotating ring. The No. 3 scraper rods are movably abutting against the inner ring wall of the extraction tank. A rotating frame is fixedly arranged between the two No. 3 scraper rods, and the rotating frame is movably sleeved on the No. 1 drive shaft. An outer magnetic rotor is fixedly arranged in the rotating frame. An annular groove is opened on the No. 2 drive shaft at the inner side of the No. 1 drive shaft. An inner magnetic rotor that is magnetically coupled to the outer magnetic rotor is fixedly arranged in the annular groove. The above technical solution uses magnetic coupling to drive the rotating ring and the No. 3 scraper rod. While the equipment completes the core separation function, it also cleans the inner wall of the extraction tank, preventing the slurry from caking on the tank wall and improving the equipment's maintenance-free level and hygiene standards.

[0012] Preferably, a flexible scraper is fixedly provided on one side wall of the third scraper, and the flexible scraper is movably in contact with the inner ring wall of the extraction tank; Through the above technical solution, the flexible scraper can maintain effective contact with the inner wall of the extraction tank while adapting to the slight unevenness that may exist on the tank wall. This elastic contact method reduces operating resistance and wear, lowers the driving load, and ensures the comprehensiveness and cleaning effect of scraping, while avoiding the damage that rigid scraping may cause to the inner wall of the extraction tank.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The stable speed difference between the high-speed rotation of the screen cylinder driven by the differential gear set and the low-speed rotation of the screw frame creates a continuous dynamic shearing and cleaning effect on the inner wall of the screen cylinder, fundamentally preventing fiber compaction and clogging of the screen holes. 2. The cleaning component integrated on the second drive shaft can perform directional and powerful rinsing of the screen cylinder and spiral frame area, forming a dual guarantee with mechanical cleaning, effectively removing stubborn deposits and achieving deep self-cleaning of the equipment; 3. The screw conveyor continuously transports the coarse slag upwards to the fixed guide ring, and the synchronously rotating inclined scraper continuously scrapes the slag to the slag outlet for discharge, ensuring the continuity and stability of production and improving the overall processing efficiency. 4. The conical bottom structure of the screen cylinder guides the slurry to flow smoothly to the cylinder wall, preventing material accumulation at the bottom. The scraper bar further ensures that the bottom of the screen cylinder is clean. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the internal structure of the extraction tank and sieve cylinder of the present invention.

[0016] Figure 3 for Figure 2 Enlarged view of part A in the image.

[0017] Figure 4 for Figure 2 Enlarged view of part B in the image.

[0018] Figure 5 This is a schematic diagram showing the connection of the first drive shaft, the second drive shaft, the motor, and the differential gear set in this invention.

[0019] Figure 6 This is a schematic diagram showing the connection between the screw frame, connecting rod, and second drive shaft in this invention.

[0020] Figure 7 This is an exploded view of the parts of the No. 1 drive shaft, No. 2 drive shaft, rotating ring, No. 3 scraper rod, and rotating frame in this invention.

[0021] Figure 8 for Figure 7 Enlarged view of section C in the image.

[0022] Explanation of reference numerals in the attached figures: Extraction tank 1, support frame 2, drive shaft 1 3, drive shaft 2 4, screen cylinder 5, cleaning assembly 6, water supply pipe 6-1, rotary joint 6-2, water outlet 6-3, one-way valve 6-4, anti-clogging cleaning assembly 7, spiral frame 7-1, connecting rod 7-2, motor 7-3, differential gear set 7-4, scraper 1 8, reinforcing rib 9, slag discharge assembly 10, guide ring 10-1, scraper 2 10-2, slag outlet 10-3, slag hopper 10-4, annular chute 11, rotating ring 12, scraper 3 13, rotating frame 14, outer magnetic rotor 15, annular groove 16, inner magnetic rotor 17, flexible scraper 18. Detailed Implementation

[0023] The invention will now be further described with reference to the accompanying drawings. Example 1:

[0024] like Figures 1-8 As shown, this embodiment includes an extraction tank 1, a support frame 2, a first drive shaft 3, a second drive shaft 4, a screen cylinder 5, an anti-clogging cleaning component 7, and a slag discharge component 10; The upper part of the support frame 2 is welded and fixed to the extraction tank 1. The No. 1 drive shaft 3 is vertically rotated through the bottom center of the extraction tank 1 via a sealed bearing. The sieve cylinder 5 is suspended inside the extraction tank 1, and the bottom center of the sieve cylinder 5 is welded and fixed to the No. 1 drive shaft 3. The second drive shaft 4 is coaxially rotatably inserted into the first drive shaft 3 via a sealed bearing. The lower end of the second drive shaft 4 is rotatably connected to the support frame 2 via a bearing. The screen cylinder 5 is equipped with an anti-clogging cleaning component 7 connected to the second drive shaft 4. The slag discharge component 10 is located in the extraction tank 1 and connected to the anti-clogging cleaning component 7. The anti-clogging and cleaning assembly 7 includes a spiral frame 7-1, a connecting rod 7-2, a motor 7-3, and a differential gear set 7-4. The spiral frame 7-1 is movably installed inside the screen cylinder 5. The spiral frame 7-1 is fixedly connected to the second drive shaft 4 through several connecting rods 7-2. The motor 7-3 is fixedly installed on the support frame 2 through a bracket and bolts. The output shaft of the motor 7-3 is connected to the first drive shaft 3 and the second drive shaft 4 through the differential gear set 7-4, so that the power of the single motor 7-3 is decomposed into two outputs with a predetermined stable speed difference, thereby driving the screen cylinder 5 to rotate at high speed (for example, for centrifugal separation). At the same time, the spiral frame 7-1 is driven to rotate in the same direction but at a significantly lower speed through the second drive shaft 4 and the connecting rod 7-2. While achieving efficient centrifugal separation, dynamic self-cleaning of the inner wall of the screen cylinder 5 and stable axial conveying of coarse slag are realized, preventing screen hole clogging and material accumulation. The slag discharge assembly 10 includes a guide ring 10-1, a second scraper rod 10-2, a slag outlet 10-3, and a slag hopper 10-4. The guide ring 10-1 is fixedly installed on the inner wall of the extraction tank 1 by bolts and is located on the upper outer side of the screen cylinder 5. The inner ring of the guide ring 10-1 is rotatably sleeved on the screen cylinder 5 through a bearing. The guide ring 10-1 has a structure with the outer edge inclined downward. The second scraper rod 10-2 is an inclined rod structure that cooperates with the inclined surface of the guide ring 10-1. One end of the second scraper rod 10-2 is fixedly connected to the screw frame 7-1, and the second scraper rod 10-2 is in contact with the upper surface of the guide ring 10-1. The slag outlet 10-3 is opened on the side wall of the extraction tank 1 at a position above the edge of the guide ring 10-1. The slag hopper 10-4, which communicates with the slag outlet 10-3, is fixedly installed on the side wall of the extraction tank 1. The bottom of the screen cylinder 5 is designed as a conical structure. A scraper rod 8 is fixedly installed on the second drive shaft 4 by bolts. The scraper rod 8 moves against the conical inner bottom wall of the screen cylinder 5. The scraper rod 8 can rotate slowly with the second drive shaft 4 to prevent fibers from depositing in the central area at the bottom. Several reinforcing ribs 9 are welded along the circumferential radius at the connection between the first drive shaft 3 and the bottom of the screen cylinder 5, which enhances the structural rigidity and fatigue resistance of the connection part and ensures stability under high-speed rotation. Example 2:

[0025] See Figure 1-2 , Figure 7 As shown, based on Embodiment 1, a further improvement is made, wherein the extraction tank 1 is provided with a second drive shaft 4 connected to the cleaning assembly 6; The cleaning assembly 6 includes a water supply pipe 6-1 and a one-way valve 6-4. The water supply pipe 6-1 is fixedly inserted into the top of the extraction tank 1. The interior of the second drive shaft 4 is hollow, forming a water delivery channel. The lower end of the water supply pipe 6-1 is connected to the upper end of the second drive shaft 4 through a high-pressure rotary joint 6-2 to achieve fluid-sealed transmission between the stationary pipe and the rotating shaft. Several water outlet holes 6-3 are opened on the outer ring wall of the shaft section inside the screen cylinder 5 of the second drive shaft 4. A miniature one-way valve 6-4 is fixedly installed inside the water outlet hole 6-3. The one-way valve 6-4 is a rubber check valve structure. Its valve port is kept closed by its own elasticity when there is no internal water pressure to prevent slurry backflow. When high-pressure water is introduced, the valve port is opened to form a directional jet of water and achieves cleaning of the inner wall of the screen cylinder 5. Example 3:

[0026] See Figure 3 , Figure 6-8As shown, based on Embodiment 1, a further improvement is made. The bottom of the guide ring 10-1 is provided with an annular groove 11. A rotating ring 12 is movably arranged in the annular groove 11. Two vertical scraper rods 13 are fixedly arranged at the bottom of the rotating ring 12 by bolts. A flexible scraper strip 18 is bonded and fixed to the side of the scraper rod 13 facing the inner wall of the extraction tank 1. The flexible scraper strip 18 is made of wear-resistant elastic material such as polyurethane. The edge of the flexible scraper strip 18 maintains elastic contact with the inner annular wall of the extraction tank 1. The two scraper rods 13 are connected and fixed by bolts through a rotating frame 14. The rotating frame 14 is movably sleeved on the first drive shaft 3. An outer magnetic rotor 15 is fixedly embedded inside the rotating frame 14. An annular groove 16 is provided on the shaft section of the second drive shaft 4 located inside the first drive shaft 3. An inner magnetic rotor 17 is fixedly embedded in the annular groove 16. The inner magnetic rotor 17 and the outer magnetic rotor 15 are isolated by the first drive shaft 3 but maintain magnetic coupling.

[0027] When using this invention, the slurry enters the screen cylinder 5 from the feed inlet at the top of the extraction tank 1. The motor 7-3 drives the first drive shaft 3 and the second drive shaft 4 to rotate at different speeds through the differential gear set 7-4. The first drive shaft 3 drives the screen cylinder 5 to rotate at high speed. Under the action of strong centrifugal force, the slurry is thrown towards the inner wall of the screen cylinder 5. The qualified fine fibers and water (slurry) overcome surface tension and fluid resistance under the forced drive of centrifugal force, pass through the screen holes and are thrown out of the screen cylinder 5, enter the cavity between the extraction tank 1 and the screen cylinder 5, and finally are discharged from the discharge port at the bottom of the extraction tank 1, completing the efficient active centrifugal separation, which fundamentally avoids the problem of fiber being compacted by pressure and clogging the screen holes in traditional pressure screens. Meanwhile, the second drive shaft 4 rotates in the same direction at a speed significantly lower than that of the screen cylinder 5. The second drive shaft 4 drives the screw frame 7-1 to rotate slowly through the connecting rod 7-2. A stable speed difference is formed between the blades of the screw frame 7-1 and the inner wall of the high-speed rotating screen cylinder 5. This allows the screw blades to continuously scrape and clean the inner wall of the screen cylinder, breaking up any fiber layers that may be attached or bridged, thus achieving dynamic self-cleaning. At the same time, the screw blades continuously convey long fibers, fiber bundles, and other heavier impurities (collectively referred to as slag) that cannot pass through the screen holes upwards axially, preventing slag from accumulating at the bottom of the screen cylinder 5. The first scraper rod 8, fixed on the second drive shaft 4, rotates slowly with the shaft to clean any trace deposits that may exist on the conical bottom wall of the screen cylinder 5. The slag conveyed upward by the screw frame 7-1 is transported to the guide ring 10-1. The second scraper 10-2, which rotates slowly in sync with the screw frame 7-1, continuously scrapes the slag accumulated on the guide ring 10-1 to the slag outlet 10-3. The slag is finally discharged through the slag hopper 10-4, realizing the automatic and continuous collection and discharge of slag after solid-liquid separation, avoiding the need for manual slag cleaning during machine shutdown. The rotation of the second drive shaft 4 will drive the inner magnetic rotor 17 on it to rotate synchronously. Through magnetic coupling, the rotating magnetic field of the inner magnetic rotor 17 penetrates the mechanical isolation (first drive shaft 3) and drives the outer magnetic rotor 15 located in the rotating frame 14 to rotate synchronously. The outer magnetic rotor 15 drives the rotating frame 14, the rotating ring 12 and the third scraper 13 to rotate slowly around the central axis of the equipment, scraping the cylindrical inner wall of the extraction tank 1 to remove the slurry that may be attached and hardened, thus cleaning the separation chamber. When cleaning of the inside of the device is required, an external high-pressure water source can be introduced into the hollow No. 2 drive shaft 4 through the water supply pipe 6-1 and the rotary joint 6-2. The high-pressure water overcomes the closing resistance of the miniature one-way valve 6-4 and sprays out from its valve port, forming a high-pressure water jet. The water jet directly impacts the inner wall of the screen cylinder 5, powerfully flushing the stubborn fiber veneer layer that is difficult to remove by mechanical scraping, achieving deep cleaning. After rinsing, the water pressure disappears, and the one-way valve 6-4 closes instantly due to its own elasticity, strictly preventing the slurry from flowing back into the inside of the No. 2 drive shaft 4.

[0028] Compared with the prior art, the beneficial effects of this specific embodiment are as follows: 1. The stable speed difference between the high-speed rotation of the screen cylinder 5 driven by the differential gear set 7-4 and the low-speed rotation of the screw frame 7-1 creates a continuous dynamic shearing and cleaning effect on the inner wall of the screen cylinder 5, fundamentally preventing fiber compaction and clogging of the screen holes. 2. The cleaning component 6 integrated on the second drive shaft 4 can perform directional and powerful rinsing of the screen cylinder 5 and the spiral frame 7-1 area, forming a dual guarantee with mechanical cleaning, effectively removing stubborn deposits and realizing deep self-cleaning of the equipment; 3. The screw conveyor 7-1 continuously conveys the coarse slag upwards to the fixed guide ring 10-1, and the synchronously rotating inclined scraper 10-2 continuously scrapes the slag to the slag outlet 10-3 for discharge, ensuring the continuity and stability of production and improving the overall processing efficiency. 4. The conical bottom structure of the screen cylinder 5 guides the slurry to flow smoothly to the cylinder wall and prevents material accumulation at the bottom. The scraper rod 8 further ensures that the bottom of the screen cylinder 5 is clean.

[0029] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A chemical slurry extraction device with an anti-clogging structure, comprising an extraction tank (1) and a support frame (2), wherein the extraction tank (1) is fixedly installed on the upper part of the support frame (2); Its features are, It also includes: The first drive shaft (3) is rotatably mounted on the bottom wall of the extraction tank (1) through a bearing. A sieve cylinder (5) is fixedly installed at the upper end of the first drive shaft (3), and the sieve cylinder (5) is located inside the extraction tank (1). The second drive shaft (4) is rotatably inserted into the first drive shaft (3) through a bearing. The lower end of the second drive shaft (4) is rotatably connected to the support frame (2) through a bearing. The extraction tank (1) is provided with a cleaning assembly (6) connected to the second drive shaft (4). The second drive shaft (4) is provided with an anti-clogging cleaning assembly (7) connected to the screen cylinder (5). The extraction tank (1) is provided with a slag discharge assembly (10) connected to the anti-clogging cleaning assembly (7).

2. The chemical slurry extraction device with an anti-clogging structure according to claim 1, characterized in that: The cleaning assembly (6) includes: Water supply pipe (6-1), the water supply pipe (6-1) is fixedly inserted into the top of the extraction tank (1), the second drive shaft (4) has a hollow structure inside, and the lower end of the water supply pipe (6-1) is connected to the second drive shaft (4) through a rotary joint (6-2); One-way valve (6-4), there are several one-way valves (6-4), which are respectively fixedly installed in several water outlet holes (6-3) opened on the outer ring wall of the second drive shaft (4), and the water outlet holes (6-3) are connected to the inside of the second drive shaft (4).

3. The chemical slurry extraction device with an anti-clogging structure according to claim 1, characterized in that: The anti-clogging and cleaning component (7) includes: The spiral frame (7-1) is movably installed inside the screen cylinder (5). The spiral frame (7-1) is connected to the slag discharge assembly (10). Several connecting rods (7-2) are fixedly installed on the second drive shaft (4) at the inner side of the screen cylinder (5). The spiral frame (7-1) is fixedly connected to the other end of the several connecting rods (7-2). The motor (7-3) is fixedly mounted on the support frame (2). The output shaft of the motor (7-3) is connected to the first drive shaft (3) and the second drive shaft (4) through the differential gear set (7-4).

4. The chemical slurry extraction device with an anti-clogging structure according to claim 1, characterized in that: The bottom of the screen cylinder (5) is set with a conical structure. A scraper rod (8) is movably abutted on the bottom wall of the screen cylinder (5), and the scraper rod (8) is fixedly set on the second drive shaft (4).

5. The chemical slurry extraction device with an anti-clogging structure according to claim 4, characterized in that: The first drive shaft (3) has several reinforcing ribs (9) with equal rounded corners, and the reinforcing ribs (9) are fixedly set at the bottom of the screen cylinder (5).

6. The chemical slurry extraction device with an anti-clogging structure according to claim 3, characterized in that: The slag discharge assembly (10) includes: The guide ring (10-1) is fixedly installed inside the extraction tank (1) and is rotatably mounted on the screen cylinder (5) by bearings; The second scraper (10-2) is movably abutted against the guide ring (10-1) and is fixedly mounted on the screw frame (7-1). A slag outlet (10-3) is provided on the ring side wall of the extraction tank (1) at the position above the guide ring (10-1) on the right side. A slag hopper (10-4) that cooperates with the slag outlet (10-3) is fixedly provided on the right side of the extraction tank (1).

7. The chemical slurry extraction device with an anti-clogging structure according to claim 6, characterized in that: The guide ring (10-1) is an inclined structure with its outer edge pointing downwards, and the second scraper (10-2) is an inclined structure that cooperates with the outer edge of the guide ring (10-1).

8. The chemical slurry extraction device with an anti-clogging structure according to claim 6, characterized in that: A rotating ring (12) is movably arranged in the annular groove (11) at the bottom of the guide ring (10-1). Two No. 3 scraper rods (13) are fixedly arranged at the bottom of the rotating ring (12). The No. 3 scraper rods (13) are movably abutting against the inner ring wall of the extraction tank (1). A rotating frame (14) is fixedly arranged between the two No. 3 scraper rods (13). The rotating frame (14) is movably sleeved on the No. 1 drive shaft (3). An outer magnetic rotor (15) is fixedly arranged in the rotating frame (14). An annular groove (16) is opened on the No. 2 drive shaft (4) at the position inside the No. 1 drive shaft (3). An inner magnetic rotor (17) magnetically coupled to the outer magnetic rotor (15) is fixedly arranged in the annular groove (16).

9. A chemical slurry extraction device with an anti-clogging structure according to claim 8, characterized in that: A flexible scraper (18) is fixedly installed on one side wall of the No. 3 scraper (13), and the flexible scraper (18) is in movable contact with the inner ring wall of the extraction tank (1).

Images