Crushing and screening device for premna microphylla processing

Abstract

The invention belongs to the technical field of smashing and grinding, and particularly relates to a smashing and screening device for premna microphylla processing, the smashing and screening device comprises a spiral grinding assembly, a grinding driving mechanism, a backflow discharging mechanism and a barrel, the grinding driving mechanism comprises a lifting supporting assembly and a rotating driving assembly, and the lifting supporting assembly and the rotating driving assembly are arranged in the barrel. According to the spiral grinding assembly, through relative rotation of the two vortex-shaped grinding strips with the same screw pitch, materials can be pushed to move while grinding is conducted, meanwhile, sufficient extrusion force can be kept between the lifting grinding disc and the rotary grinding disc through compression and rebound of a compression spring, and the grinding efficiency is improved. And when the first spiral grinding strip and the second spiral grinding strip interfere with each other, avoiding can be conducted through descending of the lifting grinding disc.

Description

Technical Field

[0001] The invention belongs to the technical field of crushing and grinding, and in particular relates to a crushing and screening device for processing tofu chai. Background Art

[0002] Tofu shrub is a deciduous shrub with medicinal and edible value. Currently, the roots or leaves of Tofu shrub are often processed into powder by crushing, which can then be added to food or medicine. Before crushing, the leaves need to be dried in the shade to remove some of the moisture before the crushing process. However, current crushing equipment still needs to solve two problems: First, the movement of powder in traditional grinding discs is not very controllable. Generally, powder will move in all directions under the action of centrifugal force only when the rotation speed is fast. If the joint between the two discs is designed to be inclined, the falling time of the material is constant, which can easily lead to insufficient grinding time when the grinding speed changes. Second: Although the grinding disc has high grinding efficiency, the particle size of the final product is difficult to guarantee. Therefore, screening is required after grinding, and the insufficiently ground material is ground a second time. Summary of the Invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a crushing and screening device for processing tofu-fired wood. In order to achieve the technical effect of pushing the material to move outward during the grinding process, the present invention proposes a spiral grinding assembly. Through the relative rotation of two spiral grinding bars with the same pitch, the material can be pushed to move while grinding. At the same time, the compression and rebound of the clamping spring can be used to maintain sufficient extrusion pressure between the lifting grinding disc and the rotating grinding disc, and the lifting grinding disc can be lowered to avoid interference when spiral grinding bar 1 and spiral grinding bar 2 interfere.

[0004] Moreover, the external reflux unloading mechanism can not only recycle and re-grind insufficiently ground materials, but also simultaneously drive the automatic unloading component to unload materials slowly and continuously, thus ensuring the continuity of the crushing and grinding process.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a crushing and screening device for processing tofu chai, comprising a spiral grinding assembly, a grinding drive mechanism, a reflux discharge mechanism and a cylinder, wherein the grinding drive mechanism comprises a lifting support assembly and a rotary drive assembly, wherein the lifting support assembly and the rotary drive assembly are arranged in the cylinder, wherein the spiral grinding assembly comprises a lifting grinding disc and a rotary grinding disc, wherein the lifting grinding disc is slidably arranged on the lifting support assembly, and the rotary grinding disc is rotatably arranged in the reflux discharge mechanism; The lifting grinding disc is provided with a spiral grinding strip 1, and the rotating grinding disc is provided with a spiral grinding strip 2. The spiral grinding strip 1 and the spiral grinding strip 2 are both in the form of a plane spiral line, with equal pitch and matching cross-sectional profiles.

[0006] When the spiral grinding bar 1 and the spiral grinding bar 2 are staggered in a top-down perspective, the sliding of the spiral grinding bar 2 on the lifting grinding disk can grind the material on the one hand, and push the material to move outward on the other hand, so that the material can eventually fall from the edge of the lifting grinding disk; when the spiral grinding bar 1 and the spiral grinding bar 2 overlap in a top-down perspective, the lifting grinding disk will avoid interference between the spiral grinding bar 1 and the spiral grinding bar 2 by its own decline. At this time, a spiral channel is formed between the lifting grinding disk and the rotating grinding disk. When the airflow flows in the channel, it can push the material to move outward along the spiral channel. The airflow push can supplement the push of the spiral grinding bar 2, and together realize the unidirectional movement of the material.

[0007] Furthermore, the lifting support assembly includes a grinding bracket, a compression spring and a sliding block. The grinding bracket is fixed to the inside of the cylinder. The grinding bracket is provided with a guide column. The lifting grinding disc is provided with an arc top cavity. The sliding block is fixed in the arc top cavity. The sliding block is engaged and slidably arranged on the guide column. The compression spring is arranged between the grinding bracket and the sliding block.

[0008] The compression spring can create an extrusion force between the lifting grinding disc and the rotating grinding disc. At the same time, when the spiral grinding bar 1 and the spiral grinding bar 2 overlap in a top-down perspective, the compression of the compression spring can allow the lifting grinding disc to descend, thereby avoiding interference between the spiral grinding bar 1 and the spiral grinding bar 2.

[0009] Preferably, the rotary drive assembly includes a motor bracket, a drive motor, a drive gear and a driven ring gear. The motor bracket is fixed to the inner wall of the cylinder, and the drive motor is arranged on the motor bracket.

[0010] As a further preferred embodiment of the present invention, the driving gear is fixed to the output shaft of the driving motor, and the driven ring gear is fixed to the rotating grinding disc. The driving gear and the driven ring gear are engaged and transmitted. When the spiral grinding strip 1 and the spiral grinding strip 2 are squeezed against each other, the lifting grinding disc will compress the compression spring and descend.

[0011] Furthermore, the reflux unloading mechanism includes a reflux component and an automatic unloading component. The reflux component is arranged on the outside of the cylinder, and the automatic unloading component is arranged on the top of the cylinder.

[0012] Preferably, the reflux component includes a reflux channel, a reflux fan and a reflux valve, the reflux fan is arranged inside the reflux channel, the reflux valve is arranged at the end of the reflux channel, the reflux valve is provided with an exhaust port, and the internal array of the reflux valve is provided with a diversion screen plate.

[0013] Driven by the return fan, airflow is formed inside the return channel, and this airflow can transport the insufficiently ground material back to the return valve, allowing it to enter the interior of the spiral grinding component for a second time.

[0014] As a further preferred embodiment of the present invention, the automatic unloading component includes a low-temperature storage cabin and a wheeled unloading baffle. The low-temperature storage cabin is arranged above the reflux valve. A unloading port is provided on the low-temperature storage cabin. The unloading port extends into the reflux valve. The wheeled unloading baffle is rotatably arranged in the unloading port. The airflow passing through the diversion screen plate can drive the wheeled unloading baffle to rotate.

[0015] On the one hand, the diverter screen plate can isolate the insufficiently ground material and make it enter the straight cylinder part. On the other hand, it can also divert the gas in the reflux channel. Part of the gas goes downward into the space between the lifting grinding disc and the rotating grinding disc, and the other part of the gas pushes the wheel-type unloading baffle horizontally and is then discharged from the exhaust port.

[0016] The low-temperature storage chamber can cool the uncrushed materials, reduce their toughness and increase their brittleness, making them easier to convert into powder during the subsequent crushing and grinding process.

[0017] As a further preferred embodiment of the present invention, a straight cylindrical portion is provided on the rotating grinding disc, which is rotatably arranged in the reflux valve. A crushing knife is also provided inside the straight cylindrical portion. When the crushing knife rotates with the rotating grinding disc, it can perform preliminary cutting and crushing on the materials falling from the low-temperature storage compartment.

[0018] Furthermore, a screening bucket is provided in the middle of the cylinder, an inclined screening plate is provided below the screening bucket, and an aggregate box is provided below the screening plate.

[0019] Preferably, a transverse through-chamber extending into the interior of the cylinder is provided on one side of the reflux channel, an extension portion is provided on the screening plate, the extension portion is located between the transverse through-chamber and the reflux channel, and an inclined baffle is provided on the transverse through-chamber.

[0020] The beneficial effects achieved by the present invention using the above structure are as follows: (1) When the spiral grinding bar 1 and the spiral grinding bar 2 are staggered in a top-down perspective, the sliding of the spiral grinding bar 2 on the lifting grinding disc can grind the material on the one hand, and push the material toward the outside on the other hand; when the spiral grinding bar 1 and the spiral grinding bar 2 overlap in a top-down perspective, the lifting grinding disc will prevent the spiral grinding bar 1 and the spiral grinding bar 2 from interfering with each other by descending itself.

[0021] (2) When the airflow flows in the channel, it can push the material to move outward along the spiral channel. The airflow push can supplement the push of the spiral grinding bar 2, and together realize the unidirectional movement of the material.

[0022] (3) The compression spring can create an extrusion force between the lifting grinding disc and the rotating grinding disc. At the same time, when the spiral grinding strip 1 and the spiral grinding strip 2 overlap in a top-down perspective, the compression of the compression spring can allow the lifting grinding disc to descend, thereby avoiding interference between the spiral grinding strip 1 and the spiral grinding strip 2.

[0023] (4) Driven by the return fan, an airflow is formed inside the return channel. This airflow can transport the insufficiently ground material back to the return valve, allowing it to enter the interior of the spiral grinding assembly for the second time.

[0024] (5) On the one hand, the diversion screen plate can isolate the insufficiently ground materials and make them enter the straight cylinder part. On the other hand, it can also divert the gas in the reflux channel. Part of the gas goes downward into the space between the lifting grinding disc and the rotating grinding disc, and the other part of the gas pushes the wheel-type unloading baffle horizontally and then is discharged from the exhaust port.

[0025] (6) The low-temperature storage chamber can cool the uncrushed materials, reduce their toughness and increase their brittleness, making them easier to convert into powder during the subsequent crushing and grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective view of a crushing and screening device for processing tofu chai proposed by the present invention; Figure 2 This is a front view of a crushing and screening device for processing tofu chai proposed by the present invention; Figure 3 for Figure 2 A cross-sectional view along the cutting line AA; Figure 4 for Figure 3 A cross-sectional view along the cutting line BB; Figure 5 This is a schematic diagram of a half-section structure of a crushing and screening device for processing tofu chai proposed by the present invention; Figure 6 This is a schematic diagram of the explosion structure of a crushing and screening device for processing tofu chai proposed by the present invention; Figure 7 for Figure 5 A partial enlarged view of point Ⅰ in the middle; Figure 8 for Figure 3 A partial enlarged view of the middle II; Figure 9 Schematic diagram of the longitudinal projection position of the spiral grinding strip 1 and the spiral grinding strip 2; Figure 10 Schematic diagram of the rotational motion process of the spiral grinding component.

[0027] Among them, 1. spiral grinding assembly, 2. grinding drive mechanism, 3. reflux feeding mechanism, 4. cylinder, 5. lifting grinding disc, 6. rotating grinding disc, 7. spiral grinding strip 1, 8. arc top cavity part, 9. spiral grinding strip 2, 10. straight cylinder part, 11. lifting support assembly, 12. rotating drive assembly, 13. grinding bracket, 14. compression spring, 15. sliding block, 16. motor bracket, 17. drive motor, 18. drive gear Wheel, 19. Driven ring gear, 20. Guide column, 21. Reflux assembly, 22. Automatic unloading assembly, 23. Reflux channel, 24. Reflux fan, 25. Reflux valve, 26. Low-temperature storage compartment, 27. Wheeled unloading baffle, 28. Horizontal through-compartment compartment, 29. Inclined baffle, 30. Exhaust port, 31. Diverter screen plate, 32. Unloading port, 33. Screening bucket, 34. Screening plate, 35. Extension, 36. Aggregate box, 37. Crushing knife.

[0028] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0031] like Figures 1 to 8As shown, the present invention proposes a crushing and screening device for processing tofu chai, including a spiral grinding assembly 1, a grinding drive mechanism 2, a reflux discharge mechanism 3 and a cylinder 4. The grinding drive mechanism 2 includes a lifting support assembly 11 and a rotating drive assembly 12, which are arranged in the cylinder 4. The spiral grinding assembly 1 includes a lifting grinding disc 5 and a rotating grinding disc 6. The lifting grinding disc 5 is slidably arranged on the lifting support assembly 11, and the rotating grinding disc 6 is rotatably arranged in the reflux discharge mechanism 3. The lifting grinding disc 5 is provided with a spiral grinding bar 1 7, and the rotating grinding disc 6 is provided with a spiral grinding bar 2 9. The spiral grinding bar 1 7 and the spiral grinding bar 2 9 are both in the form of planar spiral lines, with equal pitch and matching cross-sectional profiles.

[0032] When the spiral grinding bar 1 7 and the spiral grinding bar 2 9 are staggered in a top-down perspective, the sliding of the spiral grinding bar 2 9 on the lifting grinding disk 5 can grind the material on the one hand, and on the other hand, push the material to move outward, so that the material can eventually fall from the edge of the lifting grinding disk 5; when the spiral grinding bar 1 7 and the spiral grinding bar 2 9 overlap in a top-down perspective, the lifting grinding disk 5 will avoid interference between the spiral grinding bar 1 7 and the spiral grinding bar 2 9 by its own descent. At this time, a spiral channel is formed between the lifting grinding disk 5 and the rotating grinding disk 6. When the airflow flows in the channel, it can push the material to move outward along the spiral channel. The airflow push can supplement the push of the spiral grinding bar 2 9, and together realize the unidirectional movement of the material.

[0033] The lifting support assembly 11 includes a grinding bracket 13, a compression spring 14 and a sliding block 15. The grinding bracket 13 is fixed to the inside of the cylinder 4. A guide column 20 is provided on the grinding bracket 13. The lifting grinding disc 5 is provided with an arc top cavity portion 8. The sliding block 15 is fixed in the arc top cavity portion 8. The sliding block 15 is engaged and slidably arranged on the guide column 20. The compression spring 14 is arranged between the grinding bracket 13 and the sliding block 15.

[0034] The compression spring 14 can create an extrusion force between the lifting grinding disc 5 and the rotating grinding disc 6. At the same time, when the spiral grinding bar 1 7 and the spiral grinding bar 2 9 overlap in a top-down perspective, the compression of the compression spring 14 can allow the lifting grinding disc 5 to descend, thereby avoiding interference between the spiral grinding bar 1 7 and the spiral grinding bar 2 9.

[0035] The rotary drive assembly 12 includes a motor bracket 16 , a drive motor 17 , a drive gear 18 and a driven ring gear 19 . The motor bracket 16 is fixed to the inner wall of the cylinder 4 , and the drive motor 17 is disposed on the motor bracket 16 .

[0036] The driving gear 18 is fixed to the output shaft of the driving motor 17, and the driven ring gear 19 is fixed to the rotating grinding disc 6. The driving gear 18 and the driven ring gear 19 are engaged and transmitted. When the spiral grinding bar 1 7 and the spiral grinding bar 2 9 are squeezed against each other, the lifting grinding disc 5 will compress the compression spring 14 and descend.

[0037] The reflux unloading mechanism 3 includes a reflux component 21 and an automatic unloading component 22 . The reflux component 21 is arranged outside the cylinder 4 , and the automatic unloading component 22 is arranged on the top of the cylinder 4 .

[0038] The reflux assembly 21 includes a reflux channel 23, a reflux fan 24 and a reflux valve 25. The reflux fan 24 is arranged inside the reflux channel 23, and the reflux valve 25 is arranged at the end of the reflux channel 23. The reflux valve 25 is provided with an exhaust port 30, and the internal array of the reflux valve 25 is provided with a diversion screen plate 31.

[0039] Driven by the return blower 24 , an airflow is formed inside the return channel 23 , and the airflow can transport the insufficiently ground material back to the return valve 25 , so that the material enters the interior of the spiral grinding assembly 1 for the second time.

[0040] The automatic unloading component 22 includes a low-temperature storage cabin 26 and a wheeled unloading baffle 27. The low-temperature storage cabin 26 is arranged above the reflux valve 25. The low-temperature storage cabin 26 is provided with a unloading port 32, which extends into the reflux valve 25. The wheeled unloading baffle 27 is rotatably arranged in the unloading port 32. The airflow passing through the diversion screen plate 31 can drive the wheeled unloading baffle 27 to rotate.

[0041] On the one hand, the diverter screen plate 31 can isolate the insufficiently ground material and allow it to enter the straight cylindrical portion 10. On the other hand, it can also divert the gas in the reflux channel 23. Part of the gas goes downward into the space between the lifting grinding disc 5 and the rotating grinding disc 6, and the other part of the gas pushes the wheeled unloading baffle 27 laterally and is then discharged from the exhaust port 30.

[0042] The low-temperature storage chamber 26 can cool the uncrushed material, reduce the toughness of the material, increase its brittleness, and make it easier to convert it into powder in the subsequent crushing and grinding process.

[0043] A straight cylindrical portion 10 is provided on the rotating grinding disc 6, and the straight cylindrical portion 10 is rotatably arranged in the reflux valve 25. A crushing knife 37 is also provided inside the straight cylindrical portion 10. When the crushing knife 37 rotates with the rotating grinding disc 6, it can perform preliminary cutting and crushing on the material falling from the low-temperature storage chamber 26.

[0044] A screening bucket 33 is provided in the middle of the cylinder 4 , an inclined screening plate 34 is provided below the screening bucket 33 , and a material collecting box 36 is provided below the screening plate 34 .

[0045] A transverse through-chamber 28 extending into the interior of the cylinder 4 is provided on one side of the reflux channel 23 , an extension portion 35 is provided on the screening plate 34 , the extension portion 35 is located between the transverse through-chamber 28 and the reflux channel 23 , and an inclined baffle 29 is provided on the transverse through-chamber 28 .

[0046] like Figure 3 As shown in the figure, the dotted arrows indicate the movement direction of the gas and material. After the material falls from the discharge port 32, it enters the straight cylinder 10 and is initially crushed by the crushing knife 37. Then the crushed material and the gas enter between the lifting grinding disc 5 and the rotating grinding disc 6, and gradually move toward the outside during the grinding process; the ground material passes through the screening bucket 33 and falls on the screening plate 34. The fully ground powder passes through the screening plate 34 and enters the collecting box 36. The material that is not fully ground enters the reflux channel 23 through the extension part 35, and is driven by the airflow in the reflux channel 23 to enter the reflux valve 25, and enters the straight cylinder 10 again after hitting the diverter screen plate 31; part of the airflow will pass through the diverter screen plate 31 to drive the wheeled discharge baffle 27 to rotate, and then be discharged through the exhaust port 30.

[0047] like Figure 9 As shown in the figure, the filled spiral part is spiral grinding bar 1 7, and the part represented by the dotted line is spiral grinding bar 2 9. Spiral grinding bar 1 7 and spiral grinding bar 2 9 are both in the form of plane spiral lines, with equal pitch and matching cross-sectional profiles.

[0048] like Figure 10 As shown, the motion process of any small segment of spiral grinding strip 2 9 is analyzed. The position of the end of the segment when it contacts the outer side of spiral grinding strip 1 7 is point a, and the position when it contacts the inner side of spiral grinding strip 1 7 is point b. Lines drawn from the center point of the spiral grinding assembly 1 toward points a and b respectively can divide the entire circumference into two sector-shaped areas (the angles of the two areas are not necessarily equal), namely A and B. The dot-dashed circle is a perfect circle with the same center as the spiral grinding assembly 1, and the arrow indicates the rotation direction of the rotating grinding disc 6. When the endpoints are in area A, the spiral grinding strip 1 7 and the spiral grinding strip 2 9 are staggered in a top-down perspective. The sliding of the spiral grinding strip 2 9 on the lifting grinding disc 5 can grind the material on the one hand, and push the material toward the outside on the other hand, so that the material can eventually fall from the edge of the lifting grinding disc 5; When the endpoints are in area B, the spiral grinding strip 1 7 and the spiral grinding strip 2 9 overlap in a top-down perspective. The lifting grinding disc 5 will prevent the spiral grinding strip 1 7 and the spiral grinding strip 2 9 from interfering with each other by lowering itself. At this time, a spiral channel is formed between the lifting grinding disc 5 and the rotating grinding disc 6. When the airflow flows in the channel, it can push the material outward along the spiral channel. The airflow can supplement the push of the spiral grinding strip 2 9, and together realize the unidirectional movement of the material. The above two processes are carried out alternately.

[0049] During specific use, the user first needs to put the dried tofu leaves into the low-temperature storage compartment 26. By lowering the temperature, the toughness of the material is reduced and the brittleness is increased, making it easier to convert it into powder in the subsequent crushing and grinding process; the material can be put into the low-temperature storage compartment 26 at one time or added in stages.

[0050] Then start the equipment, and the return fan 24 will generate a one-way airflow in the return channel 23. After the airflow enters the return valve 25, a part of it will pass through the diverter screen plate 31 and push the wheeled unloading baffle 27 to rotate, and then be discharged through the exhaust port 30. The other part will be blocked by the diverter screen plate 31 and will go down between the lifting grinding disc 5 and the rotating grinding disc 6.

[0051] When the wheeled discharge baffle 27 rotates, the material will slowly and continuously descend and enter the straight cylindrical portion 10. Since the rotating grinding disc 6 is driven by the rotating drive assembly 12 to continuously rotate, the crushing knife 37 can preliminarily crush the material through its own rotation. The preliminarily crushed material enters the lifting grinding disc 5 and the rotating grinding disc 6, and is ground into powder under the pressure of the spiral grinding bars 7 and 9. The specific steps are as follows: When the lifting grinding disc 5 just rises, the spiral grinding strip 2 9 is attached to the outside of the spiral grinding strip 1 7, that is, the inside of the spiral channel of the lifting grinding disc 5. Then, as the rotating grinding disc 6 rotates, the spiral grinding strip 2 9 will gradually approach the outside of the spiral channel. In this process, the material inside the spiral channel can be ground and pushed outwards at the same time. Part of the material will climb over the spiral grinding strip 1 7 and enter the outer circle in this process. After the airflow enters the reflux valve 25, another part of the gas will flow downward under the obstruction of the diverter screen plate 31 and enter between the lifting grinding disc 5 and the rotating grinding disc 6, and continue to push the material outward; The movement of the material mainly depends on the push of the spiral grinding bars 29. The airflow has a large effective range but low push efficiency. It is mainly used as a supplement and is used in areas where the spiral grinding bars 29 cannot reach. When the rotating grinding disc 6 rotates, the material moves toward the outside of the spiral grinding assembly 1 until it passes through the screening bucket 33 and falls onto the screening plate 34.

[0052] As the material moves along the inclined screen plate 34 toward the extension portion 35, small particles of powder pass through the screen plate 34 and fall into the collecting box 36. The material that cannot pass through the screen plate 34 moves to the extension portion 35, follows the air flow in the reflux channel 23 and re-enters the reflux valve 25. After hitting the diversion screen plate 31, it falls into the straight cylindrical portion 10 for secondary grinding.

[0053] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0054] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A crushing and screening device for processing tofu chai, characterized by: The invention comprises a spiral grinding assembly (1), a grinding drive mechanism (2), a reflux discharge mechanism (3) and a cylinder (4); the grinding drive mechanism (2) comprises a lifting support assembly (11) and a rotary drive assembly (12); the lifting support assembly (11) and the rotary drive assembly (12) are arranged in the cylinder (4); the spiral grinding assembly (1) comprises a lifting grinding disc (5) and a rotary grinding disc (6); the lifting grinding disc (5) is slidably arranged on the lifting support assembly (11); and the rotary grinding disc (6) is rotatably arranged in the reflux discharge mechanism (3); The lifting grinding disc (5) is provided with a spiral grinding strip 1 (7), and the rotating grinding disc (6) is provided with a spiral grinding strip 2 (9). The spiral grinding strip 1 (7) and the spiral grinding strip 2 (9) are both in the form of a plane vortex line, and the pitch of the two is equal and the cross-sectional profiles match each other.

2. The crushing and screening device for processing tofu chai according to claim 1, characterized in that: The lifting support assembly (11) includes a grinding bracket (13), a compression spring (14) and a sliding block (15), wherein the grinding bracket (13) is fixed to the inside of the cylinder (4), a guide column (20) is provided on the grinding bracket (13), an arc top cavity portion (8) is provided on the lifting grinding disc (5), the sliding block (15) is fixed in the arc top cavity portion (8), the sliding block (15) is engaged and slidably arranged on the guide column (20), and the compression spring (14) is arranged between the grinding bracket (13) and the sliding block (15).

3. The crushing and screening device for processing tofu chai according to claim 2, characterized in that: The rotary drive assembly (12) comprises a motor bracket (16), a drive motor (17), a drive gear (18) and a driven ring gear (19); the motor bracket (16) is fixed to the inner wall of the cylinder (4); and the drive motor (17) is arranged on the motor bracket (16).

4. The crushing and screening device for processing tofu chai according to claim 3, characterized in that: The driving gear (18) is fixedly connected to the output shaft of the driving motor (17), and the driven ring gear (19) is fixedly connected to the rotating grinding disc (6). The driving gear (18) and the driven ring gear (19) are meshed and transmitted. When the spiral grinding strip 1 (7) and the spiral grinding strip 2 (9) are pressed against each other, the lifting grinding disc (5) compresses the compression spring (14) and descends.

5. The crushing and screening device for processing tofu chai according to claim 4, characterized in that: The reflux unloading mechanism (3) comprises a reflux component (21) and an automatic unloading component (22); the reflux component (21) is arranged outside the cylinder (4), and the automatic unloading component (22) is arranged on the top of the cylinder (4).

6. The crushing and screening device for processing tofu chai according to claim 5, characterized in that: The return assembly (21) comprises a return channel (23), a return fan (24) and a return valve (25); the return fan (24) is arranged inside the return channel (23); the return valve (25) is arranged at the end of the return channel (23); an exhaust port (30) is provided on the return valve (25); and a diversion sieve plate (31) is provided in an internal array of the return valve (25).

7. The crushing and screening device for processing tofu chai according to claim 6, characterized in that: The automatic unloading assembly (22) includes a low-temperature storage cabin (26) and a wheeled unloading baffle (27). The low-temperature storage cabin (26) is arranged above the reflux valve (25). A unloading port (32) is provided on the low-temperature storage cabin (26). The unloading port (32) extends into the reflux valve (25). The wheeled unloading baffle (27) is rotatably arranged in the unloading port (32). The airflow passing through the diversion screen plate (31) can drive the wheeled unloading baffle (27) to rotate.

8. The crushing and screening device for processing tofu chai according to claim 7, characterized in that: The rotating grinding disc (6) is provided with a straight cylindrical portion (10), which is rotatably arranged in a reflux valve (25). A crushing knife (37) is also provided inside the straight cylindrical portion (10), and the crushing knife (37) can rotate along with the rotating grinding disc (6).

9. The crushing and screening device for processing tofu chai according to claim 8, characterized in that: A screening bucket (33) is provided in the middle of the cylinder (4), an inclined screening plate (34) is provided below the screening bucket (33) of the cylinder (4), and a material collecting box (36) is provided below the screening plate (34).

10. The crushing and screening device for processing tofu chai according to claim 9, characterized in that: A transverse through-chamber (28) extending into the interior of the cylinder (4) is provided on one side of the reflux channel (23); an extension portion (35) is provided on the screening plate (34); the extension portion (35) is located between the transverse through-chamber (28) and the reflux channel (23); and an inclined baffle (29) is provided on the transverse through-chamber (28).

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