Millstone beating machine

Abstract

The invention relates to the technical field of pulping, in particular to a millstone pulping machine which comprises a lower shell, an upper shell, a motor, a movable millstone, a fixed millstone, a filter screen and a screen mesh, the motor is fixedly mounted on the outer bottom wall of the lower shell, the screen mesh is fixedly mounted on the inner wall of the lower shell, an output shaft of the motor extends into the screen mesh, the filter screen covers the screen mesh, and the fixed millstone is fixedly mounted on the lower shell. A motor is fixedly installed on the lower wall of the upper shell, a movable grinding disc is fixedly installed on an output shaft of the motor, and a fixed grinding disc is fixedly installed on the bottom wall of the upper shell. A friction wheel arranged on the screen makes contact with a friction ring arranged on the bottom wall of the lower shell to drive a reciprocating lead screw to rotate, so that a first magnet fixed to the reciprocating lead screw moves; due to the fact that the second magnet and the first magnet attract each other to be matched and move synchronously, the scraping plate fixed to the second magnet is driven to move on the filter screen, and the problem that the filter screen is blocked due to the fact that soybeans are ground too finely or the proportion of the water adding amount to the feeding amount in the grinding process is improper in the actual production process of the soybean beating machine is solved.

Description

Technical Field

[0001] This invention relates to the field of pulping technology, specifically to a disc pulping machine. Background Technology

[0002] In the production of soy products, the process of making soy products is to produce protein colloids of different properties. In order to convert the protein in soybean raw materials into protein colloids, the grinding (pulping) process is indispensable.

[0003] A soybean grinder grinds soybeans between two grinding discs to produce soybean pulp and soy milk, which are then separated by a filter. The centrifugal force from the rotating discs expels the soybean pulp from the grinder. Theoretically, the finer the soybeans are ground, the better, as this allows for maximum binding and extraction of nutrients. However, in actual production, excessively fine soybean pulp can clog the mesh of the pulp separator, making soy milk filtration difficult. Furthermore, an insufficient water-to-powder ratio during grinding increases the viscosity of the soybean pulp, making it difficult to expel and causing it to accumulate on the filter screen, clogging it. This not only increases the difficulty of filtering soy milk but also increases the load on the grinding discs, potentially even causing them to jam.

[0004] Regardless of the cause of filter clogging, it will reduce the production efficiency of the pulping machine.

[0005] To address this, a grinding disc pulper is proposed. The friction wheel set on the screen contacts the friction ring set on the bottom wall of the lower housing, which drives the reciprocating screw to rotate. This causes the first magnet fixed on the reciprocating screw to move. Since the second magnet and the first magnet attract each other and move synchronously, the scraper fixed on the second magnet moves on the filter screen to achieve the effect of cleaning the filter screen.

[0006] The information disclosed in this background section is only intended to enhance the understanding of the background of this disclosure, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a grinding disc pulping machine, which drives a reciprocating screw to rotate by contacting a friction wheel set on the screen and a friction ring set on the bottom wall of the lower housing. This causes a magnet fixed on the reciprocating screw to move, and a second magnet attracts and engages with the first magnet, thereby driving a scraper fixed on the second magnet to move on the filter screen, thus solving the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A grinding disc pulper includes: a lower housing, an upper housing, a motor, a moving grinding disc, a fixed grinding disc, a filter screen, and a sieve screen. The motor is fixedly installed on the outer bottom wall of the lower housing, and the sieve screen is fixedly installed on the inner wall of the lower housing. The output shaft of the motor extends into the sieve screen, and the sieve screen is covered with a filter screen. The moving grinding disc is fixedly installed on the output shaft of the motor, and the fixed grinding disc is fixedly installed on the bottom wall of the upper housing.

[0010] A funnel and a feed pipe are installed on the top wall of the upper shell. The bottom wall of the feed pipe extends to the vicinity of the moving grinding disc, and the fixed grinding disc is fixedly installed on the bottom wall of the feed pipe. A through hole is opened in the middle of the fixed grinding disc to connect it with the feed pipe. Soybeans in the funnel fall onto the moving grinding disc through the feed pipe. The moving grinding disc is driven by a motor, and the soybeans are drawn into the grinding surfaces of the fixed and moving grinding discs by centrifugal force during rotation. After being thoroughly ground and crushed, the soybeans become soybean residue and soy milk, which are discharged from the bottom of the screen outside the moving grinding disc under rotation. A filter screen is fixed on the screen, which is in turn fixed on the output shaft of the motor. When the soybean residue falls onto the filter screen, the soy milk is further thrown out by centrifugal force. The dried soybean residue is discharged from the slag discharge port of the upper shell, and the soy milk flows out from the discharge port of the lower shell.

[0011] Preferably, the screen is equipped with a cleaning device, which is used to continuously and slowly clean the grinding residue on the screen to prevent the screen from clogging.

[0012] Preferably, the cleaning device includes a magnet 1 slidably mounted on a screen, a magnet 2 slidably mounted on the screen and attracted to the magnet 1, a scraper fixedly mounted between two adjacent magnets 2, and a driving assembly provided on the outer wall of the screen, the driving assembly being used to drive the magnet 1, so that the scraper fixed on the magnet 2 reciprocates.

[0013] The scraper is fixedly mounted on magnet one at both ends. Magnet one and magnet two attract and cooperate with each other through the filter screen and sieve. The scraper is positioned between magnet two, and the magnetic force between magnet one and magnet two provides pressure on the filter screen for the scraper. The drive unit drives magnet one, which in turn drives magnet two, causing the scraper on magnet two to move up and down reciprocally on the surface of the filter screen, achieving a cleaning effect. This allows the drive assembly to be positioned between the lower housing and the sieve, making full use of the space in the lower housing.

[0014] Preferably, the drive assembly includes eight fixed blocks symmetrically fixedly installed on the outer wall of the screen. The eight fixed blocks are evenly divided into four groups, with two fixed blocks in each group located on the generatrix of the screen. A reciprocating screw is rotatably installed between the two fixed blocks in each group. A friction wheel is fixedly installed at the bottom of the reciprocating screw. A friction ring that cooperates with the friction wheel is fixedly installed on the bottom wall of the lower housing. A threaded hole that cooperates with the reciprocating screw is opened inside the magnet.

[0015] Furthermore, the screen is provided with four through slots, and the first magnet is located in one of the through slots. The cross-section of the first magnet is T-shaped, and the cross-section of the second magnet is U-shaped.

[0016] Both the friction wheel and the friction ring have a frosted finish. When the friction wheel rotates along the central axis of the moving grinding disc with the screen, it rotates by contacting the friction ring. This causes the reciprocating screw to rotate within the fixed block. Since magnet one extends into the through groove and its width is approximately equal to the width of the through groove, the rotation of magnet one is restricted when the reciprocating screw rotates, allowing it to move only along the axis of the reciprocating screw. This enables magnet two to move magnet one, which in turn moves the scraper to clean the filter screen.

[0017] By opening grooves in the screen, the contact between magnet one and magnet two is only separated by the screen. Since the cross-section of magnet one is T-shaped and the cross-section of magnet two is U-shaped, the convex surface of magnet one and the concave surface of magnet two cooperate to prevent magnet two from shifting laterally when they move together, thus ensuring the movement trajectory of the scraper.

[0018] Similarly, there are various ways to rotate the reciprocating screw, such as driving it with a small motor or directly using an electric push rod instead of the reciprocating screw, which can achieve the same effect described above. However, the advantage of this solution is that it uses non-electrical equipment to drive the reciprocating screw. After the grinder finishes working, the upper housing needs to be removed to wash the filter screen and other parts to remove any remaining soybean residue and soy milk, preventing them from spoiling inside the grinder. If an electric drive is used to move the scraper inside the lower housing, it is necessary to ensure strict sealing of these electrical components. Moreover, since the scraper is constantly rotating, the wiring of these electrical components is difficult to arrange.

[0019] Preferably, the rough area on the friction ring is smaller than the overall area and is evenly distributed on the friction ring.

[0020] As the screen rotates, even when the screen is not clogged with soybean residue, the scraper will continue to scrape the screen. The frequent scraping of the screen surface by the scraper can easily cause structural fatigue of the screen and reduce its service life.

[0021] In addition, because the residue from grinding soybeans contains a lot of fiber and has a loose structure, it easily absorbs soy milk. The scraper moves quickly on the filter screen, which can easily push the soybean residue that has not been completely descrambled to the top of the screen and discharge it, resulting in some soy milk not being collected and causing certain economic losses.

[0022] To address this, the effective contact area between the friction ring and the friction wheel is made smaller than the overall area, reducing the rotation frequency of the friction wheel. This causes the reciprocating screw to rotate intermittently, reducing the speed at which the scraper cleans the filter screen. Furthermore, this ensures sufficient residence time of the soybean residue within the filter screen, allowing enough time for the soybean milk to separate from the residue before it is ejected by the passive grinding disc.

[0023] Preferably, the second magnet has an inclined groove, and the two ends of the extension are fixedly installed with fixing rods. The fixing rods are slidably installed in the inclined groove so that the scraper adheres to the filter screen when the screen rotates.

[0024] The angle between the inclined groove and the horizontal plane is between 0 and +45°. The two ends of the extension are fixedly installed with fixing rods smaller than magnet II. By sliding the fixing rods in the inclined groove, the scraper and the filter screen can be attached and separated.

[0025] When the screen is stationary, the fixing rod and scraper are located at the bottom of the inclined chute. When the screen rotates, the fixing rod is thrown to the top of the inclined chute by centrifugal force, causing the scraper to adhere tightly to the screen. After pulping, the upper shell, moving and fixed grinding discs need to be removed. At this time, the fixing rod returns to the bottom of the inclined chute under gravity, causing the scraper to separate from the screen. During the process of rinsing the screen with a water gun, the water flow can more easily clean the contact area between the scraper and the screen without disassembling the scraper, facilitating the cleaning of the screen and scraper and preventing spoilage caused by soybean residue remaining on the screen and scraper. Since the screen and screen are not fixedly connected, the scraper is not tightly attached to the screen at this time, and the screen can be easily lifted off the screen. Then, the back of the screen can be cleaned with a water gun, and any remaining soybean residue will flow out from the screen holes, avoiding frequent disassembly of the scraper.

[0026] Furthermore, the scraper includes an extension fixedly mounted on the second magnet, and a spring is fixedly mounted on the end of the extension away from the second magnet. The spring is also fixedly mounted on the fixed part. Both the extension and the fixed part are composed of multiple sections of alloy steel spliced ​​together by rubber blocks.

[0027] The scraper is divided into an extension section and a fixed section. Since the scraper cleans the filter screen attached to the screen from top to bottom or bottom to top, and the screen is funnel-shaped with a smaller bottom and a larger top, and the filter screen is installed close to the screen, the width of the scraper should be constantly changing in order to effectively clean the soybean residue on the filter screen.

[0028] The extension is connected to the fixed part by a spring. When the second magnet is at the bottom of the through groove, the extension is inside the fixed part and the spring is in its natural state. As the scraper moves upward with the second magnet, the extension is gradually pulled out by the first magnet. After the second magnet descends into the through groove, the spring pulls the extension back into the fixed part.

[0029] Both the extension section and the fixing section are composed of multiple sections of alloy steel spliced ​​together with rubber blocks. As the extension section and the fixing section move back and forth with the drive component, they can undergo a certain deformation and adhere to the filter screen through the centrifugal force when the screen rotates. Therefore, the extension section and the fixing section can maintain their adherence to the filter screen through their own deformation, ensuring the cleaning effect of the extension section on the filter screen.

[0030] Preferably, the upper and lower sides of the extension and the fixing part are both inclined surfaces, and multiple rollers are rotatably installed inside the fixing part. The outer wall of the rollers is covered with bristles, and the length of the bristles is exactly through the filter holes on the filter screen.

[0031] Preferably, the roller is disposed between the two blades.

[0032] Furthermore, the blades of the fixed part and the extension near the moving grinding disc form an acute angle with the filter screen, so that the soybean residue will not accumulate on the scraper.

[0033] The scraper's sidewall fits snugly against the filter screen, cleaning it as it moves up and down. However, during the scraper's movement, or when soybean residue is thrown onto the screen, some residue inevitably gets squeezed into or embedded in the mesh. To address this, multiple rollers are installed on the scraper, connected in series with a steel wire rope. The bristles on these rollers contact the filter screen, and as the scraper moves, the rollers rotate due to this contact. By inserting the bristles into the mesh, they push out the soybean residue clogging the mesh, thus cleaning the screen, improving filtration efficiency, and minimizing impact on the rollers' rotation.

[0034] The scraper has blades on both the top and bottom sides, with the blades forming an acute angle with the filter screen. As the scraper moves downward, it separates the soybean residue from the filter screen, allowing the residue to move upward along the blades. Centrifugal force then discharges the residue promptly, preventing it from accumulating on the bottom wall of the scraper.

[0035] As the scraper moves upward, the soybean residue accumulates on the top wall of the scraper. When the soybean residue approaches the discharge port, it is discharged by centrifugal force.

[0036] The soybean pulp squeezed out of the filter by the brush will mix with the soybean milk at the bottom of the lower shell and flow out of the outlet together. Because the amount is small, usually accounting for about 1% of the soybean milk content, it meets the standards for making tofu or dried tofu later, so it will not affect subsequent processing.

[0037] The roller is fixed in the middle of the scraper, ensuring that the blade passes through the scraper before the roller, whether the scraper moves up or down, so that each filter screen can be cleared in time.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] 1. A scraper is installed on the filter screen and fixed on magnet two. After the friction wheel contacts the abrasive area on the friction ring, the reciprocating screw rotates. Magnet one and magnet two attract each other and rotate synchronously, thereby driving the scraper to move on the filter screen to achieve the effect of cleaning the filter screen and preventing filter screen blockage caused by grinding soybeans too finely or improper ratio of water and feed during the grinding process.

[0040] 2. The scraper is movably installed in the inclined groove of magnet two via a fixing rod. When the screen rotates, the fixing rod is thrown to the top of the inclined groove by centrifugal force, causing the scraper to adhere tightly to the filter screen. After pulping, the screen is stationary, and the fixing rod and scraper are located at the bottom of the inclined groove under the action of gravity. At this time, the scraper, which has lost the centrifugal force, is no longer pressed tightly against the filter screen, but has a certain gap with the filter screen, which facilitates cleaning the filter screen with water. This allows for a more thorough cleaning of the scraper and filter screen, preventing the spoilage caused by soybean residue remaining on the filter screen and scraper.

[0041] 3. Set the cross-section of magnet one to T-shape and magnet two to U-shape. By opening through grooves on the screen, magnet one and magnet two are only separated by the screen. When magnet one and magnet two cooperate and move, magnet one and magnet two are nested in each other, which effectively prevents magnet two from shifting laterally during movement and ensures the movement trajectory of the scraper. Attached Figure Description

[0042] Figure 1 This is an overall structural diagram of the present invention;

[0043] Figure 2 This is a half-section view of the overall structure;

[0044] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;

[0045] Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle;

[0046] Figure 5 This is a schematic diagram showing the relationship between the scraper and magnet one and magnet two.

[0047] Figure 6 for Figure 5 The left view;

[0048] Figure 7 This is a schematic diagram of a sieve.

[0049] In the diagram: 1. Upper housing; 2. Lower housing; 3. Motor; 4. Screen; 5. Filter screen; 101. Fixed grinding disc; 201. Moving grinding disc; 401. Fixed block; 402. Reciprocating lead screw; 403. Friction wheel; 404. Friction ring; 405. Magnet one; 406. Magnet two; 407. Through groove; 501. Fixed part; 502. Extension part; 503. Fixed rod; 504. Inclined groove; 505. Roller; 506. Spring; 5011. Blade face. Detailed Implementation

[0050] The aspects and features of this disclosure, as well as the methods for implementing these aspects and features, will be apparent; however, this disclosure is not limited to the embodiments disclosed below and can be implemented in various forms. These embodiments are provided to assist those skilled in the art in fully understanding this disclosure, and this disclosure is limited only to the scope of the appended claims.

[0051] Example 1: Grinding soybeans into a pulp. Please refer to [link / reference]. Figures 1 to 7 The present invention provides a grinding disc pulping machine, the technical solution of which is as follows:

[0052] Before grinding soybeans, eight fixing blocks 401 are symmetrically glued to the outer wall of the screen 4, with four fixing blocks 401 located at the top and four at the bottom of the screen 4. A reciprocating screw 402 is rotatably mounted on the top and bottom fixing blocks 401. A friction wheel 403 is glued to the bottom of the reciprocating screw 402. A friction ring 404 is bolted to the bottom of the lower housing 2 and contacts the friction wheel 403. A threaded hole is opened on the magnet 405 and it is rotatably mounted on the reciprocating screw 402.

[0053] After installing the screen 4 onto the lower housing 2, lay the filter screen 5 on the screen 4. The output shaft of the motor 3 extends into the interior of the screen 4. When installing the moving grinding disc 201, press the bottom of the filter screen 5 to the same position, smooth the filter screen 5 from bottom to top, and adjust the position of each magnet 405 to the lowest or highest position. Insert the fixing rods 503 at both ends of the extension 502 into the inclined grooves 504 of the magnet 406, so that the scraper and the magnet 406 are connected to each other to form a circle. Install the concave surface of the magnet 406 onto the magnet 405 through the filter screen 5. After installing the other parts, install the upper housing 1 onto the lower housing 2, and use the upper housing 1 to press the top of the filter screen 5, or directly use the outer edge of the top of the screen 4 to press the filter screen 5 against the top wall of the lower housing 2.

[0054] When grinding soybeans, first adjust the distance between the fixed grinding disc 101 and the moving grinding disc 201, then start the motor 3. You can clearly hear the friction sound produced by the slight contact between the moving grinding disc 201 and the fixed grinding disc 101, which indicates that the fixed grinding disc 101 and the moving grinding disc 201 are properly matched. Soybeans are evenly fed into the funnel on the top wall of the upper shell 1 by manual labor or machine. The soybeans fall along the feed pipe at the bottom of the funnel, pass through the fixed grinding disc 101 and finally fall onto the moving grinding disc 201. The moving grinding disc 201, through rotation and the special texture on its surface, first swings the soybeans outward until the soybeans are crushed and fall onto the filter screen 5. At the same time, the screen 4 also rotates with the moving grinding disc 201, causing the fixed rod 503 located in the inclined groove 504 of the magnet 406 to move upward, and the scraper to stick tightly to the surface of the filter screen 5. As the friction wheel 403 moves on the surface of the friction ring 404, when the friction wheel 403 contacts the abrasive area on the friction ring 404, the friction wheel 403 rotates around its own axis, thereby driving the reciprocating screw 402 to rotate, causing magnet 1 405 to move upward along the reciprocating screw 402, and magnet 2 406 to be attracted to magnet 1 405, causing it to move synchronously with magnet 1 405, driving the scraper to move back and forth along the generatrix of the screen 4 to remove the soybean residue remaining on the filter screen 5. Furthermore, the cross-section of magnet 405 is T-shaped and the cross-section of magnet 406 is U-shaped. When magnet 405 and magnet 406 cooperate and move, it can effectively prevent magnet 406 from shifting laterally during movement. As the scraper moves upward with magnet 406, the extension 502 is gradually pulled out by magnet 405, and the spring 506 is stretched. The lower part of the scraper is provided with a blade. When magnet 406 descends to the through groove 407, the filter screen 5 is cleaned again, and the spring 506 pulls the extension 502 back into the fixed part 501.

[0055] The diameter ratio of friction ring 404 to friction wheel 403 is 1:15. With motor 3 rotating at 120 rpm, friction wheel 403 rotates at 30 rpm. Setting the lead screw pitch to 2 mm, the scraper moves on filter screen 5 at 60 mm / s. However, after adjusting the effective contact area between friction ring 404 and friction wheel 403 to the initial 10%, under normal conditions with screen 4 rotating at a constant speed, friction wheel 403 rotates at only 3 rpm, while the scraper moves on filter screen 5 at 6 mm / s. This significantly reduces the cleaning frequency of the scraper on filter screen 5 and improves its service life.

[0056] After grinding is completed, the upper housing 1 is removed, and the moving grinding disc 201 and screen 4 inside the lower housing 2 are taken out. At this time, there are two ways to clean the filter screen 5. One is to remove the scraper and magnet 406 from the filter screen 5, rinse each disassembled part with a water gun or water pipe, and then reinstall each part. The other is to leave the scraper and magnet 406 on the filter screen 5 and rinse them directly with a water gun or water pipe. Since the fixed rod 503 and the tube plate are located at the bottom of the inclined groove 504 when the screen 4 is stationary, there is a certain gap between the scraper and the filter screen 5, and the soybean residue attached to the filter screen 5 can be easily washed away.

[0057] Compared with existing small soybean pulping machines, the scraper of this invention keeps the filter screen 5 slowly clean during the grinding process. While ensuring the original functions of removing slag and filtering pulp, it avoids clogging of the filter screen 5 caused by excessively fine soybean grinding or improper ratio of water and feed during grinding, thus ensuring production efficiency.

[0058] Example 2: Rice is pulped.

[0059] During the rice pulping process, rice residue inevitably occurs due to insufficient grinding. These rice residue particles are small and not easily ejected from the filter screen 5. Furthermore, since rice has a starch content of 75%, which is higher than that of soybeans, rice pulp is more viscous than soy pulp. When grinding rice, the filter screen 5 is more prone to clogging due to mismatch between the amount of water and the amount of rice. Alternatively, the surface tension formed by the viscous rice pulp adhering to the filter screen 5 makes it difficult to filter out the rice pulp inside the filter screen 5.

[0060] However, compared to soybean residue, these rice residues do not absorb the rice slurry on filter screen 5. Therefore, as the screen 4 rotates, the rice slurry easily separates from the rice residues, so the rice residues stay on filter screen 5 for a shorter time than soybean residues.

[0061] The effective contact area between the friction ring 404 and the friction wheel 403 is set to 30% of the total area. This increases the moving speed of the scraper on the filter screen 5. The scraper disrupts the surface tension of the rice slurry on the filter screen 5 by moving it, allowing the rice slurry to be filtered out better. The scraper also pushes the rice residue to the upper part of the filter screen 5. Since the screen 4 is not conical, the rice residue is subjected to greater centrifugal force here and is more easily thrown out of the slag discharge port.

[0062] In the above description, the roller 505 on the scraper can be removed instead of using the roller 505 to unclog the filter screen 5. Users can choose to remove it according to their own needs.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate and facilitate those skilled in the art to understand the technical solutions of the present invention, and are not intended to limit them; modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the inventive motivation of the present invention.

Claims

1. A disc pulper, comprising: The lower housing (2), upper housing (1), motor (3), moving grinding disc (201), fixed grinding disc (101), filter screen (5), sieve (4) are provided. The motor (3) is fixedly installed on the outer bottom wall of the lower housing (2), and the sieve (4) is fixedly installed on the inner wall of the lower housing (2). The output shaft of the motor (3) extends into the sieve (4). The sieve (4) is covered with a filter screen (5). The moving grinding disc (201) is fixedly installed on the output shaft of the motor (3), and the fixed grinding disc (101) is fixedly installed on the bottom wall of the upper housing (1). Its characteristic is that it further includes: The cleaning device is provided on the screen (4). The cleaning device is used to continuously and slowly clean the grinding residue on the filter screen (5) to prevent the filter screen (5) from clogging.

2. The grinding disc pulper according to claim 1, characterized in that: The cleaning device includes a magnet 1 (405) slidably mounted on a screen (4), a magnet 2 (406) slidably mounted on a filter screen (5) and attracted to the magnet 1 (405), a scraper fixedly mounted between two adjacent magnets 2 (406), and a driving assembly provided on the outer wall of the screen (4). The driving assembly is used to drive the magnet 1 (405) so that the scraper fixed on the magnet 2 (406) reciprocates.

3. The grinding disc pulper according to claim 2, characterized in that: The drive assembly includes eight fixed blocks (401) symmetrically fixed on the outer wall of the screen (4). The eight fixed blocks (401) are evenly divided into four groups. The two fixed blocks (401) in each group are located on the generatrix of the screen (4). A reciprocating screw (402) is rotatably installed between the two fixed blocks (401) in each group. A friction wheel (403) is fixedly installed at the bottom of the reciprocating screw (402). A friction ring (404) that cooperates with the friction wheel (403) is fixedly installed on the bottom wall of the lower housing (2). A threaded hole that cooperates with the reciprocating screw (402) is opened in the magnet (405).

4. A grinding disc pulper according to claim 2, characterized in that: The scraper includes an extension (502) fixedly mounted on the magnet (406). A spring (506) is fixedly mounted on one end of the extension (502) away from the magnet (406). The spring (506) is fixedly mounted on the fixing part (501). Both the extension (502) and the fixing part (501) are composed of multiple sections of alloy steel spliced ​​together by rubber blocks.

5. A grinding disc pulper according to claim 3, characterized in that: The screen (4) has four through slots (407), and the first magnet (405) is located in the through slot (407). The first magnet (405) is T-shaped, and the second magnet (406) is U-shaped.

6. A grinding disc pulper according to claim 4, characterized in that: Both the upper and lower sides of the extension (502) and the fixing part (501) are provided with blades. Multiple rollers (505) are rotatably installed on the bottom wall of the extension (502). The outer wall of the rollers (505) is covered with bristles, and the length of the bristles just passes through the filter holes on the filter screen (5).

7. A grinding disc pulper according to claim 3, characterized in that: The rough area on the friction ring (404) is smaller than the overall area and is evenly distributed on the friction ring (404).

8. A grinding disc pulper according to claim 4, characterized in that: The magnet 2 (406) has an inclined groove (504), and the two ends of the extension (502) are fixedly installed with fixing rods (503). The fixing rods (503) are slidably installed in the inclined groove (504) so ​​that the scraper will stick to the filter screen (5) when the screen (4) rotates.

9. A grinding disc pulper according to claim 6, characterized in that: The roller (505) is positioned between the two blades (5011).

10. A grinding disc pulper according to claim 6, characterized in that: The blades (5011) of the fixed part (501) and the extension part (502) near the moving grinding disc (201) form an acute angle with the filter screen (5), so that the soybean residue will not accumulate on the scraper.

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