A grinding apparatus for producing potato starch and a grinding method thereof

Abstract

This invention belongs to the field of starch production technology and discloses a grinding device and method for producing potato starch. The device includes a casing with a feed inlet on its top surface and a slurry outlet and a slurry outlet arranged vertically on one side. It also includes a grinding mechanism, a filtering mechanism, and a fine grinding mechanism. In this invention, the grinding mechanism cuts the potatoes before grinding, preventing damage to the starch granules from direct grinding. Simultaneously, the grinding mechanism drives the filtering mechanism to filter the fiber in the potato slurry. This filtering mechanism not only separates the starch from the fiber in the potato slurry but also maintains maximum filtration efficiency throughout the process.

Description

Technical Field

[0001] This invention belongs to the field of starch production technology, specifically a grinding device and grinding method for producing potato starch. Background Technology

[0002] In the production of potato starch, potatoes need to be washed, then cut into pieces, crushed, ground into a slurry, sieved, settled, and dehydrated to release the potato starch from the potato cells. During the crushing and grinding process, as the fibers in the potato pieces are broken out, they fall into the filter screen below along with the potato slurry, separating the potato slurry and fibers. However, as the fibers accumulate on the filter plate, the starch in the potato slurry is blocked by the fibers and cannot pass through. This necessitates subsequent rinsing of the fibers to recover the starch particles trapped by the fibers, reducing the production efficiency of potato starch. Summary of the Invention

[0003] The purpose of this invention is to provide a grinding device and grinding method for producing potato starch, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a grinding device for producing potato starch, comprising a casing, wherein a feed inlet is provided on the top surface of the casing, and a slag outlet and a slurry outlet arranged vertically are provided on one side of the casing, and further comprising:

[0005] The grinding mechanism includes a rotating shaft passing through the housing, a rotating sleeve rotatably mounted on the rotating shaft, and two shredding covers symmetrically arranged on the rotating shaft. One shredding cover is fixedly sleeved on the rotating shaft, and the other shredding cover is rotatably mounted on the rotating sleeve. Symmetrical grinding covers and flow guide covers are fixedly connected to the inner side of the housing. The grinding covers are located on the inner side of the shredding covers, and the flow guide covers are located on the outer circumferential surface of the shredding covers. One end of the rotating sleeve is located between the two shredding covers and is fixedly sleeved with a push wheel. A driving mechanism is provided on the rotating shaft to make the shredding covers and the push wheel rotate in opposite directions.

[0006] The filtration mechanism includes a fixed cover fixedly connected to the inner side of the housing, a filter frame hinged between the two fixed covers, a crossbar parallel to the axis of rotation fixedly connected inside the filter frame, a starch trough opened on the top surface of the filter frame, a first screen plate fixedly connected to the top surface of the filter frame, and one end of the starch trough being open and facing the slag outlet.

[0007] Preferably, the drive mechanism includes a first gear fixedly sleeved on a rotating shaft and a second gear rotatably mounted on a rotating sleeve. A shredding cover rotatably mounted on the rotating sleeve is fixedly connected to the second gear. A fifth gear is fixedly sleeved on the rotating sleeve. A third gear and a fourth gear are rotatably mounted on the side of the housing. The third gear meshes with the first, second, and fourth gears, and the fourth gear meshes with the fifth gear.

[0008] Preferably, the first gear and the second gear are gears with the same number of teeth, and the fourth gear has fewer teeth than the first gear.

[0009] Preferably, the grinding cover has multiple grinding strips fixedly connected to the side facing the chopping cover, the side of the chopping cover has multiple chopping grooves, and the outer peripheral surface of the chopping cover has multiple discharge grooves.

[0010] Preferably, a plurality of actuating plates are fixedly connected to the outer peripheral surface of the shredding shroud, a receiving groove is provided on the inner side of the flow guide shroud, and a discharge port is provided on the outer side of the flow guide shroud.

[0011] Preferably, the filter frame has feeding grooves on both sides that match the adjacent discharge ports, and a second screen plate is slidably connected to the top surface of the filter frame. The second screen plate is located directly below the first screen plate, and a first spring is elastically connected between the side of the second screen plate away from the slag discharge port and the inner side of the starch tank.

[0012] Preferably, the inner bottom surface of the starch tank is fixedly connected with multiple partition strips, the bottom surface of the filter frame is fixedly connected with a counterweight block, and the inside of the housing is fixedly connected with a limiting frame, which is located on the bottom surface of the filter frame.

[0013] Preferably, it also includes a fine grinding mechanism, which includes two grinding rollers rotatably installed inside the machine housing. An inclined filter screen is also fixedly connected inside the machine housing, and the filter screen is located between the slag outlet and the slurry outlet.

[0014] A grinding method for producing potato starch includes the following steps:

[0015] S1. Put potatoes into the machine casing through the feed inlet and inject flowing water into the machine casing through the feed inlet;

[0016] S2. The rotating shaft and grinding roller are driven by a motor to rotate, and the potatoes are cut into small pieces by the chopping grooves on the chopping cover;

[0017] S3. The chopped potato chunks enter between the grinding hood and the chopping hood, are ground by the grinding hood, and enter the filtration mechanism through the discharge chute and discharge port.

[0018] S4. When the agitator wheel rotates, it contacts the crossbar, causing the filter frame to rotate and vibrate, which shakes the starch in the fiber into the starch trough below.

[0019] S5. The starch in the starch tank is carried away by the water flow when the filter frame is tilted and leaves from the slurry outlet.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. In this invention, through the grinding mechanism, as potatoes are fed into the feed inlet, they are squeezed and rubbed against the chopping cover by the agitator wheel. As the potatoes are squeezed against the chopping grooves on the chopping cover and the agitator wheel rotates, the potatoes are cut into strips by the chopping grooves. As the potato strips enter the chopping cover, they come into contact with the grinding strips on the grinding cover and are finely ground. The finely ground potato pieces then fall from the discharge chute into the receiving trough in the guide cover. Driven by the agitator plate, they enter the filter frame from the discharge outlet. At this time, the finely ground potato pieces are separated and filtered by the first screen plate. The starch enters the starch trough below, while the fibers remain on the first screen plate. At the same time, as the agitator wheel rotates, it moves the fibers on the filter frame after approaching it, thereby preventing the fibers from accumulating and affecting the filtering effect of the first screen plate. It also prevents the fibers from getting stuck on the first screen plate and thus being unable to leave the filtering mechanism by the water flow when the filter frame is tilted.

[0022] 2. Secondly, through the designed filtration mechanism, as the actuating wheel rotates, after it contacts the crossbar, the actuating wheel drives the filter frame to rotate via the crossbar. At this time, the end of the filter frame near the slag outlet tilts downwards, and simultaneously, the second screen plate slides out under its own weight, thus blocking the mesh on the first screen plate. This allows water falling from above to flow over the first screen plate, causing the water flow to carry the broken and filtered fibers along the first screen plate towards the filter screen plate, ultimately causing the fibers to be discharged from the slag outlet. Simultaneously, as the filter frame rotates, the water in the starch tank carries the starch particles from the filter... The slurry flows out from the open section of the frame, then into the bottom of the machine casing and out of the outlet. At the same time, the counterweight block seals the outlet, preventing potato chunks from falling directly into the machine casing. As the agitator wheel stops contacting the crossbar, the filter frame returns to its upright position under the action of the counterweight block. At this time, the filter frame collides with the limit frame, causing the limit remaining on the first screen plate to be vibrated and dislodged. It then leaves the equipment on the next rotation of the filter frame. Simultaneously, the vibration of the filter frame also shakes small potato chunks stuck in the mesh of the first screen plate into the starch tank below, preventing the filtration efficiency of the first screen plate from decreasing.

[0023] 3. Finally, through the designed drive mechanism, when the motor drives the rotating shaft to rotate, the rotating shaft drives the two chopping covers and the agitator wheel to rotate in opposite directions. As the potatoes are moved by the agitator wheel, the friction and squeezing force between the potatoes and the chopping covers is greater, making the potatoes more thoroughly crushed and ground. At the same time, using different tooth ratios to drive the agitator wheel and the chopping cover to rotate at different speeds further improves the crushing and cutting effect on the potatoes, thereby more effectively releasing the starch granules in the potato cells and ensuring the starch extraction effect of the potatoes. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic cross-sectional view of the casing structure of the present invention;

[0026] Figure 3 This is a partial cross-sectional view of the grinding mechanism of the present invention;

[0027] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the grinding cover, shredding cover, and flow guide cover of the present invention;

[0029] Figure 6 This is a schematic diagram of the drive mechanism structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the filter mechanism structure of the present invention;

[0031] Figure 8 This is a cross-sectional view of the filtration mechanism of the present invention;

[0032] Figure 9 For the present invention Figure 8 Enlarged diagram of point B in the middle.

[0033] In the diagram: 1. Machine casing; 11. Feed inlet; 12. Slag outlet; 13. Slurry outlet; 2. Grinding mechanism; 21. Rotating shaft; 22. Rotating sleeve; 23. Actuating wheel; 24. First gear; 25. Second gear; 26. Third gear; 27. Fourth gear; 28. Fifth gear; 29. ​​Grinding hood; 210. Grinding strips; 211. Chopping hood; 212. Chopping trough; 213. Discharge trough; 214. 1. Actuating plate; 215. Flow guide; 216. Receiving trough; 217. Discharge port; 3. Filtering mechanism; 31. Fixing cover; 32. Filter frame; 33. Crossbar; 34. Feed trough; 35. First screen plate; 36. Second screen plate; 37. Starch tank; 38. Separator strip; 39. Counterweight block; 310. First spring; 311. Limiting frame; 4. Fine grinding mechanism; 41. Grinding roller; 42. Filter screen plate. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1 to 9 As shown, this embodiment of the invention provides a grinding device for producing potato starch, including a casing 1, a feed inlet 11 on the top surface of the casing 1, and a slag outlet 12 and a slurry outlet 13 arranged vertically on one side of the casing 1, and further including:

[0036] The grinding mechanism 2 includes a rotating shaft 21 that passes through the housing 1. A rotating sleeve 22 is rotatably mounted on the rotating shaft 21. Two shredding covers 211 are symmetrically arranged on the rotating shaft 21. One shredding cover 211 is fixedly sleeved on the rotating shaft 21, and the other shredding cover 211 is rotatably mounted on the rotating sleeve 22. A symmetrical grinding cover 29 and a flow guide cover 215 are fixedly connected to the inner side of the housing 1. The grinding cover 29 is located on the inner side of the shredding cover 211, and the flow guide cover 215 is located on the outer circumferential surface of the shredding cover 211. One end of the rotating sleeve 22 is located between the two shredding covers 211 and is fixedly sleeved with a push wheel 23. A driving mechanism is provided on the rotating shaft 21 to make the shredding cover 211 and the push wheel 23 rotate in opposite directions.

[0037] The filter mechanism 3 includes a fixed cover 31 fixedly connected to the inner side of the housing 1. A filter frame 32 is hinged between the two fixed covers 31. A crossbar 33 parallel to the axis of the rotating shaft 21 is fixedly connected inside the filter frame 32. A starch trough 37 is opened on the top surface of the filter frame 32. A first mesh plate 35 is fixedly connected to the top surface of the filter frame 32. One end of the starch trough 37 is open and faces the slag outlet 12.

[0038] In this invention, through the grinding mechanism 2, as potatoes are fed into the feed inlet 11, they are squeezed and rubbed against the chopping cover 211 by the agitator 23. As the potatoes are squeezed against the chopping grooves 212 on the chopping cover 211 and the agitator rotates, the potatoes are cut into strips by the chopping grooves 212. As the potato strips enter the chopping cover 211, they come into contact with the grinding strips 210 on the grinding cover 29 and are finely ground. The finely ground potato pieces then fall from the discharge chute 213 into the receiving trough 216 inside the guide cover 215. Driven by the agitator 214, the potato chunks enter the filter frame 32 from the outlet 217. At this time, the finely ground potato chunks are separated and filtered by the first mesh plate 35. The starch enters the starch tank 37 below, while the fiber remains on the first mesh plate 35. At the same time, as the agitator 23 rotates, it will move the fiber on the filter frame 32 after approaching it, thus preventing the fiber from accumulating and affecting the filtration effect of the first mesh plate 35. It also prevents the fiber from getting stuck on the first mesh plate 35, so that it cannot be driven away from the filter mechanism 3 by the water flow when the filter frame 32 is tilted.

[0039] Secondly, through the designed filter mechanism 3, as the actuating wheel 23 rotates, after the actuating wheel 23 contacts the crossbar 33, the actuating wheel 23 drives the filter frame 32 to rotate through the crossbar 33. At this time, the end of the filter frame 32 near the slag outlet 12 tilts downward. At the same time, the second screen plate 36 slides out under its own weight, thereby blocking the mesh on the first screen plate 35. This allows the water falling from above to flow over the first screen plate 35, so that the water flow carries the broken and filtered fibers along the first screen plate 35 to the filter screen plate 42, and finally the fibers are discharged from the slag outlet 12. Meanwhile, as the filter frame 32 rotates, the water in the starch tank 37 will carry the starch particles from the filter frame 32. The slurry flows out from the open portion on 2, then into the bottom of the casing 1 and leaves from the outlet 13. At the same time, the counterweight block 39 seals the outlet 217, thus preventing potato chunks from falling directly into the casing 1. As the agitator 23 no longer contacts the crossbar 33, the filter frame 32 returns to its original position under the action of the counterweight block 39. At this time, the filter frame 32 will collide with the limit frame 311, causing the fibers remaining on the first screen plate 35 to be vibrated and fall off, thus leaving the equipment in the next rotation of the filter frame 32. At the same time, the vibration of the filter frame 32 will also shake the small potato chunks stuck in the mesh of the first screen plate 35 into the starch tank 37 below, preventing the filtration efficiency of the first screen plate 35 from decreasing.

[0040] Finally, through the designed drive mechanism, when the motor drives the rotating shaft 21 to rotate, the rotating shaft 21 drives the two chopping covers 211 and the actuating wheel 23 to rotate in opposite directions. As the potato is moved by the actuating wheel 23, the friction and squeezing force between the potato and the chopping cover 211 is greater, making the potato more thoroughly crushed and ground. At the same time, using different tooth ratios to drive the actuating wheel 23 and the chopping cover 211 to rotate at different speeds further improves the crushing and cutting effect on the potato, thereby more effectively releasing the starch granules in the potato cells and ensuring the starch extraction effect of the potato.

[0041] The drive mechanism includes a first gear 24 fixedly sleeved on a rotating shaft 21 and a second gear 25 rotatably mounted on a rotating sleeve 22. A shredding cover 211 rotatably mounted on the rotating sleeve 22 is fixedly connected to the second gear 25. A fifth gear 28 is fixedly sleeved on the rotating sleeve 22. A third gear 26 and a fourth gear 27 are rotatably mounted on the side of the housing 1. The third gear 26 meshes with the first gear 24, the second gear 25 and the fourth gear 27. The fourth gear 27 meshes with the fifth gear 28. The first gear 24 and the second gear 25 are gears with the same number of teeth. The fourth gear 27 has fewer teeth than the first gear 24.

[0042] As the motor drives the rotating shaft 21 to rotate, the rotating shaft 21 drives the first gear 24 to rotate, and through the transmission of the third gear 26, drives the second gear 25 to rotate. At this time, the second gear 25 drives the chopping cover 211 fixed to it to rotate. At the same time, the third gear 26 also drives the fourth gear 27 meshing with it to rotate. The fourth gear 27 drives the fifth gear 28 to rotate. At this time, the fifth gear 28 drives the rotating sleeve 22 fixed to it to rotate. The rotating sleeve 22 drives the actuating wheel 23 fixedly sleeved with it to rotate. With the participation of the fourth gear 27, the actuating wheel 23 and the chopping cover 211 rotate in opposite directions, so that the potatoes are driven by the actuating wheel 23 to rub and squeeze against the chopping cover 211 and be chopped, thus ensuring the chopping effect of the potatoes.

[0043] Among them, a plurality of grinding strips 210 are fixedly connected to the side of the grinding cover 29 facing the chopping cover 211, a plurality of chopping grooves 212 are opened on the side of the chopping cover 211, a plurality of discharge grooves 213 are opened on the outer peripheral surface of the chopping cover 211, a plurality of actuating plates 214 are fixedly connected to the outer peripheral surface of the chopping cover 211, a receiving groove 216 is opened on the inner side of the flow guide cover 215, and a discharge port 217 is opened on the outer side of the flow guide cover 215.

[0044] As potatoes are chopped into strips by the chopping hood 211, the potato strips are then squeezed between the grinding hood 29 and the chopping hood 211 by subsequent potatoes. As the potato strips come into contact with the grinding strips 210, they are ground into potato slurry, thereby releasing the starch granules inside the potatoes. The potato slurry then flows along the discharge chute 213 on the circumference of the chopping hood 211 into the receiving chute 216 on the guide hood 215. Under the action of the agitator 214, it leaves from the discharge port 217 and enters the filter rack 32. Through the grinding effect of the grinding strips 210, the starch granules inside the potatoes are fully released, ensuring the extraction effect of potato starch.

[0045] The filter frame 32 has feed troughs 34 on both sides that match the adjacent discharge port 217. The top surface of the filter frame 32 is slidably connected to a second screen plate 36. The second screen plate 36 is located directly below the first screen plate 35. The side of the second screen plate 36 away from the slag discharge port 12 is elastically connected to the inner side of the starch tank 37 by a first spring 310.

[0046] The sliding connection of the second screen plate 36 causes it to slide due to its own weight when the filter frame 32 is tilted downwards near the slag outlet 12. This causes the second screen plate 36 to block the mesh on the first screen plate 35, preventing fibers from falling from the mesh of the first screen plate 35 into the starch tank 37 below during the tilting of the filter frame 32. This would cause the starch tank 37 to become clogged and prevent the starch from leaving the filter mechanism 3. At the same time, as the second screen plate 36 blocks the mesh on the first screen plate 35, water flows from above the first screen plate 35, allowing the water flow to more effectively carry the fibers on the first screen plate 35 and prevent fiber accumulation.

[0047] Among them, the bottom surface of the starch tank 37 is fixedly connected with multiple partition strips 38, the bottom surface of the filter frame 32 is fixedly connected with a counterweight block 39, and the inside of the housing 1 is fixedly connected with a limit frame 311, which is located on the bottom surface of the filter frame 32.

[0048] like Figure 7 and Figure 8 As shown, the counterweight block 39 is located on the side of the filter frame 32 away from the slag outlet 12. As the actuating wheel 23 contacts the crossbar 33, it drives the filter frame 32 to rotate. As the actuating wheel 23 continues to rotate and no longer contacts the crossbar 33, the weight of the counterweight block 39 causes the filter frame 32 to return to the center. At this time, one end of the filter frame 32 collides with the limiting frame 311, causing the fibers remaining on the first screen plate 35 to vibrate, thereby shaking the starch particles in the fibers into the starch tank 37 below, thus ensuring the extraction effect of potato starch. At the same time, the vibration of the first screen plate 35 will shake out the small potato pieces stuck in its mesh so that they can be ground by the subsequent fine grinding mechanism 4, preventing waste and ensuring the filtration effect of the first screen plate 35.

[0049] It also includes a fine grinding mechanism 4, which includes two grinding rollers 41 rotatably installed inside the housing 1. An inclined filter screen 42 is also fixedly connected inside the housing 1, and the filter screen 42 is located between the slag outlet 12 and the slurry outlet 13.

[0050] The present invention also provides a grinding method for producing potato starch, comprising the following steps:

[0051] S1. Potatoes are fed into the machine casing 1 through the feed inlet 11, and flowing water is injected into the machine casing 1 through the feed inlet 11.

[0052] S2. The rotating shaft 21 and grinding roller 41 are driven by a motor to rotate, and the potatoes are cut into small pieces by the chopping groove 212 on the chopping cover 211.

[0053] S3. The chopped potato chunks enter between the grinding hood 29 and the chopping hood 211, are ground by the grinding hood 29, and enter the filter mechanism 3 through the discharge chute 213 and the discharge port 217.

[0054] S4. When the agitator wheel 23 rotates, it contacts the crossbar 33, causing the filter frame 32 to rotate and vibrate, which causes the starch in the fiber to be shaken off into the starch trough 37 below.

[0055] S5. The starch in the starch tank 37 is carried by the water flow when the filter frame 32 is tilted and leaves from the slurry outlet 13.

[0056] Working principle:

[0057] When using this invention, the rotating shaft 21 and grinding roller 41 are first driven by a motor to rotate. As the rotating shaft 21 rotates, it drives the chopping cover 211 and the agitator wheel 23 to rotate in opposite directions through the drive mechanism. At this time, washed potatoes are put into the machine casing 1 through the feed inlet 11 and flowing water is injected through the feed inlet 11. As the potatoes are driven by the agitator wheel 23, the potatoes are rubbed and squeezed by the chopping cover 211 and then chopped. The chopped potatoes then enter between the grinding cover 29 and the chopping cover 211 and are ground into potato slurry by the grinding strip 210. After that, the potato slurry enters the receiving tank 216 and enters the filter frame 32 in the filter mechanism 3 through the discharge port 217 and the feed trough 34.

[0058] As the potato slurry enters the filter rack 32, the starch particles in the slurry are filtered by the first screen plate 35 along with the water flow and enter the starch tank 37. Meanwhile, the fiber and other substances in the potato slurry are filtered by the first screen plate 35 and remain on it. As the actuating wheel 23 rotates and contacts the crossbar 33, the actuating wheel 23 moves the crossbar 33, causing the filter rack 32 to rotate around its hinge point. The end of the filter rack 32 near the slag outlet 12 tilts downwards. At this time, the second screen plate 36 slides downwards under its own weight, allowing the slurry to pass through. The mesh on the first screen plate 35 is blocked, so that the fibers on the first screen plate 35 are carried by the water flow and leave from the slag outlet 12 along the filter screen plate 42. As the filter frame 32 rotates, the starch in the starch tank 37 flows along with the water that was originally in the starch tank 37, and finally leaves the starch tank 37 and falls to the bottom of the machine casing 1. Then it leaves from the pulp outlet 13 with the water flow. During the rotation of the filter frame 32, the counterweight block block 39 blocks the discharge outlet 217, thereby preventing the potato pulp in the receiving tank 216 from flowing directly into the bottom of the machine casing 1.

[0059] As the actuating wheel 23 continues to rotate, it no longer contacts the crossbar 33. At this time, the filter frame 32 is reset under the action of the counterweight block 39, and the second mesh plate 36 is reset by the first spring 310. As the filter frame 32 is reset and rotates, its bottom collides with the limiting frame 311, causing the filter frame 32, the first mesh plate 35, and the second mesh plate 36 to vibrate. At this time, the fibers adsorbed on the first mesh plate 35 are vibrated, thereby destroying their adsorption force. At the same time, the small potato pieces in the mesh of the first mesh plate 35 and the second mesh plate 36 are shaken off, preventing them from clogging the mesh and reducing the filtration effect. Furthermore, as the filter frame 32 vibrates, the starch particles settled in the starch tank 37 move, preventing the starch particles from getting stuck in the starch tank 37. As the equipment works, the above steps are repeated continuously to crush and grind the potatoes, releasing the starch particles.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grinding device for producing potato starch, comprising a casing (1), wherein a feed inlet (11) is provided on the top surface of the casing (1), and a slag outlet (12) and a slurry outlet (13) arranged vertically are provided on one side of the casing (1), characterized in that, Also includes: The grinding mechanism (2) includes a rotating shaft (21) that passes through the housing (1). A rotating sleeve (22) is rotatably mounted on the rotating shaft (21). Two shredding covers (211) are symmetrically arranged on the rotating shaft (21). One shredding cover (211) is fixedly sleeved on the rotating shaft (21), and the other shredding cover (211) is rotatably mounted on the rotating sleeve (22). A symmetrical grinding cover (29) and a flow guide cover (215) are fixedly connected to the inner side of the housing (1). The grinding cover (29) is located on the inner side of the shredding cover (211), and the flow guide cover (215) is located on the outer circumferential surface of the shredding cover (211). One end of the rotating sleeve (22) is located between the two shredding covers (211) and a push wheel (23) is fixedly sleeved on it. A driving mechanism is provided on the rotating shaft (21) to make the shredding cover (211) and the push wheel (23) rotate in opposite directions. The filter mechanism (3) includes a fixed cover (31) fixedly connected to the inner side of the housing (1), a filter frame (32) hinged between the two fixed covers (31), a crossbar (33) parallel to the axis of the rotating shaft (21) fixedly connected inside the filter frame (32), a starch trough (37) opened on the top surface of the filter frame (32), a first mesh plate (35) fixedly connected to the top surface of the filter frame (32), and one end of the starch trough (37) is open and faces the slag outlet (12). The chopping cover (211) has multiple chopping grooves (212) on its side, and multiple discharge grooves (213) on its outer circumference. The guide cover (215) has a discharge port (217) on its outer side. As the agitator (23) rotates, after the agitator (23) contacts the crossbar (33), the agitator (23) drives the filter frame (32) to rotate through the crossbar (33). At this time, the end of the filter frame (32) near the slag outlet (12) tilts downward.

2. A grinding apparatus for producing potato starch according to claim 1, characterized in that: The drive mechanism includes a first gear (24) fixedly sleeved on a rotating shaft (21) and a second gear (25) rotatably mounted on a rotating sleeve (22). A shredding cover (211) rotatably mounted on the rotating sleeve (22) is fixedly connected to the second gear (25). A fifth gear (28) is fixedly sleeved on the rotating sleeve (22). A third gear (26) and a fourth gear (27) are rotatably mounted on the side of the housing (1). The third gear (26) meshes with the first gear (24), the second gear (25) and the fourth gear (27). The fourth gear (27) meshes with the fifth gear (28).

3. A grinding apparatus for producing potato starch according to claim 2, characterized in that: The first gear (24) and the second gear (25) are gears with the same number of teeth, and the fourth gear (27) has fewer teeth than the first gear (24).

4. A grinding device for producing potato starch according to claim 3, characterized in that: The grinding cover (29) has multiple grinding strips (210) fixedly connected to the side facing the chopping cover (211).

5. A grinding device for producing potato starch according to claim 4, characterized in that: The outer circumferential surface of the shredder (211) is fixedly connected with a plurality of actuating plates (214), and the inner side of the flow guide (215) is provided with a receiving groove (216).

6. A grinding apparatus for producing potato starch according to claim 5, characterized in that: The filter frame (32) has feed troughs (34) on both sides that match the adjacent discharge port (217). The top surface of the filter frame (32) is slidably connected to a second screen plate (36). The second screen plate (36) is located directly below the first screen plate (35). The side of the second screen plate (36) away from the slag discharge port (12) is elastically connected to the inner side of the starch tank (37) by a first spring (310).

7. A grinding apparatus for producing potato starch according to claim 6, characterized in that: The starch tank (37) has multiple partition strips (38) fixedly connected to its inner bottom surface, the filter frame (32) has a counterweight block (39) fixedly connected to its bottom surface, and the casing (1) has a limiting frame (311) fixedly connected inside, with the limiting frame (311) located on the bottom surface of the filter frame (32).

8. A grinding apparatus for producing potato starch according to claim 7, characterized in that: It also includes a fine grinding mechanism (4), which includes two grinding rollers (41) rotatably installed inside the housing (1). An inclined filter plate (42) is also fixedly connected inside the housing (1), and the filter plate (42) is located between the slag outlet (12) and the slurry outlet (13).

9. A grinding method for producing potato starch, applied to the grinding apparatus for producing potato starch according to claim 8, characterized by: Includes the following steps: S1. Put potatoes into the machine casing (1) through the feed inlet (11) and inject flowing water into the machine casing (1) through the feed inlet (11); S2. Using a motor to drive the rotating shaft (21) and grinding roller (41) to rotate, the potatoes are cut into pieces by the chopping groove (212) on the chopping cover (211); S3. The chopped potato chunks enter the grinding hood (29) and the chopping hood (211) and are ground by the grinding hood (29). They then enter the filtration mechanism (3) through the discharge chute (213) and the discharge port (217). S4. When the agitator wheel (23) rotates, it contacts the crossbar (33) to cause the filter frame (32) to rotate and vibrate, causing the starch in the fiber to be shaken off to the starch trough (37) below. S5. The starch in the starch tank (37) is carried away by the water flow when the filter frame (32) is tilted and leaves from the slurry outlet (13).

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