Starch sand washing device for sweet potato starch production

Abstract

The invention relates to the technical field of sweet potato starch sand washing, in particular to a starch sand washing device for sweet potato starch production, which comprises a multi-stage pre-filtering assembly, the top of the multi-stage pre-filtering assembly is provided with an adjustable feeding assembly, and the side of the multi-stage pre-filtering assembly is provided with a multi-stage countercurrent cleaning assembly; the multi-stage pre-filtering assembly comprises a shell, a sliding groove is fixedly connected to the interior of the shell, a sliding block is slidably connected to the interior of the sliding groove, a supporting frame is fixedly connected to the top of the sliding block, a rack is fixedly connected to the outer wall of the supporting frame, a gear is meshed with the side of the rack, and a first rotating shaft is fixedly connected to the interior of the gear; a motor is mounted on the first rotating shaft; large impurities which are screened out can be directly discharged through the discharging hopper, and concentrated cleaning is facilitated; and the collecting disc is arranged at the bottom of the small screening disc, fine impurities obtained after two times of screening can be collected, the collecting disc can be cleaned regularly, and the workload and the time cost of manual cleaning are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sweet potato starch sand washing, in particular to a starch sand washing device for sweet potato starch production. Background Art

[0002] With the continued growth in demand for starch in the food, pharmaceutical, and chemical industries, sweet potatoes, a high-yield, starch-rich crop, have become a key raw material for starch production. In recent years, the sweet potato starch industry has continued to expand, with numerous companies entering production and market competition becoming increasingly fierce. Against this backdrop, improving sweet potato starch production efficiency and product quality has become a key focus for companies.

[0003] In Chinese patent CN202320376479.3, the utility model provides a starch sand washing device for sweet potato starch production, including a support frame, a sedimentation tank, a vibrating rod, a first movable groove, a filter screen plate, a second movable groove and a spring shock absorber. A conveyor belt is arranged between the support frames, an inclined plate is fixed on the upper end surface of the conveyor belt, a sand receiving hopper is arranged below the upper end of the conveyor belt, the sedimentation tank is arranged below the lower end of the conveyor belt, a fixed frame is installed on the upper end surface of the sedimentation tank, a vibration motor is fixed on the upper end surface of the fixed frame, a filter screen plate is fixed on the lower end surface of the vibrating rod, a first movable groove is opened inside the fixed frame and is close to the vibrating rod, a second movable groove is opened in the sedimentation tank and is close to the filter screen plate, movable columns are fixed at the four corners of the lower end surface of the sedimentation tank, the movable columns extend into the interior of the support columns, and a spring shock absorber is arranged between the lower end surface of the movable column and the upper end surface of the support column. This design drives the starch slurry to vibrate when it passes through the filter screen, so that it can fall quickly, prevent the filter screen from being blocked, and improve the production speed of the starch slurry.

[0004] Currently, most sweet potato starch sand washing devices directly clean sweet potato starch. Before sweet potato processing, some fibers are not completely removed in the pretreatment stage. After the fiber-containing starch enters the sand washing device, under the action of water flow and stirring, the long and tough fibers tend to entangle into clumps. These fiber clumps will block the water flow channel of the device, causing uneven flow rate and water pressure imbalance, reducing the efficiency of sand washing. At the same time, it may also be entangled on components such as blades and filters, causing component jams and increasing the risk of equipment failure. Even if the fibers are washed away, residual fiber fragments will enter the subsequent process with the starch. In the dehydration process, it interferes with the separation of starch and water, causing the water content of the product to be high; in the drying process, it affects the uniformity of heat transfer, resulting in uneven drying of the starch, seriously affecting product quality and bringing many disadvantages to the company.

[0005] Therefore, in response to the above problems, a starch sand washing device for sweet potato starch production is proposed. Summary of the Invention

[0006] In order to remedy the shortcomings of the prior art, the present invention provides a starch sand washing device for sweet potato starch production to provide a device with better adaptability and ease of use. This device solves the problem that current sweet potato starch sand washing devices mostly directly clean the sweet potato starch. Before sweet potato processing, some fibers are not completely removed in the pretreatment stage. After the fiber-containing starch enters the sand washing device, under the action of water flow and stirring, the long and tough fibers tend to entangle into clumps. These fiber clumps will block the water flow channel of the device, causing uneven flow rate and water pressure imbalance, reducing the efficiency of sand washing. At the same time, they may also entangle on components such as blades and filters, causing component jamming and increasing the risk of equipment failure. Even if the fibers are washed away, residual fiber fragments will enter the subsequent process with the starch. In the dehydration stage, it interferes with the separation of starch and water, resulting in a high water content in the product; in the drying process, it affects the uniformity of heat transfer, resulting in uneven starch drying, seriously affecting product quality and bringing many adverse problems to the company.

[0007] The technical solution adopted by the present invention to solve its technical problems is: it includes a multi-stage pre-filter component, the top of the multi-stage pre-filter component is installed with an adjustable feed component, and the side of the multi-stage pre-filter component is installed with a multi-stage countercurrent cleaning component; the multi-stage pre-filter component includes an outer shell, the interior of the outer shell is fixedly connected with a slide groove, and the interior of the slide groove is slidably connected with a slider, the top of the slider is fixedly connected with a support frame, and the outer wall of the support frame is fixedly connected with a rack, the side of the rack is meshed with a gear, and the interior of the gear is fixedly connected with a first rotating shaft, and the first rotating shaft is installed with a motor, the interior of the support frame is fixedly connected with a smaller sieve plate, and the top of the smaller sieve plate is provided with a larger sieve plate, the side of the larger sieve plate is provided with a discharge hopper, and the bottom of the larger sieve plate is provided with a collection plate.

[0008] Preferably, the support frame forms a sliding structure through a slider, a slide groove and a shell, and the slider and the support frame are integrated.

[0009] Preferably, the smaller sieve tray and the support frame are integrated, the larger sieve tray and the support frame are integrated, and the collecting tray and the support frame are integrated.

[0010] Preferably, the motor forms a transmission structure through a gear, a rack and a support frame, and the gear and the rack are meshed with each other, and two gears are symmetrically arranged about the horizontal center axis of the first rotating shaft.

[0011] Preferably, the adjustable feeding assembly includes a feeding hopper, a baffle plate is provided inside the feeding hopper, and a rotating shaft is fixedly connected to the inside of the baffle plate, and a worm gear is fixedly connected to the end of the rotating shaft, a worm is meshed with a side of the worm gear, and one end of the worm gear is fixedly connected to a turntable, and the other end of the worm gear is fixedly connected to a bearing, and the bottom of the bearing is fixedly connected to a support block.

[0012] Preferably, the baffle plate forms a rotating structure with the feed hopper through a rotating shaft, and the baffle plate and the rotating shaft are integrated.

[0013] Preferably, the worm wheel and the worm form a meshing structure, and the worm forms a rotating structure through a bearing and a support block, and the worm and the turntable are integrated.

[0014] Preferably, the multi-stage countercurrent cleaning assembly includes a cleaning trough, the interior of which is fixedly connected to a baffle, and an inclined plate is provided at the bottom of the baffle, the bottom of the cleaning trough is fixedly connected to a dust reduction trough, and the top of the dust reduction trough is snap-connected to a filter screen, and the bottom of the dust reduction trough is fixedly connected to a sewage outlet, the end of the cleaning trough is fixedly connected to a discharge port, and the side of the cleaning trough is fixedly connected to a water pump, the side of the water pump is fixedly connected to an external water pipe, and the end of the water pump is fixedly connected to a water outlet pipe, and the outer wall of the outlet pipe is fixedly connected to the water outlet.

[0015] Preferably, the cleaning tank and the baffle are integrated, and the height of the baffle is four-fifths of the cleaning tank, and a gap is left between the bottom of the baffle and the cleaning tank.

[0016] Preferably, the cleaning trough and the dust reduction trough are integrated, and the dust reduction trough and the dust reduction trough form a locking structure, and the dust reduction trough and the sewage outlet form a connecting structure. The external water pipe forms a connecting structure with the water outlet through the water pump, the water outlet pipe, and the water outlet is arranged at equal intervals about the outer wall of the water outlet pipe.

[0017] The present invention is beneficial in that: 1. The present invention comprises a multi-stage pre-filtration assembly, which is equipped with a larger sieve plate and a smaller sieve plate to form a multi-stage screening structure. The larger sieve plate can first filter out larger impurities in the sweet potato starch, such as large fiber clumps and rhizome pieces. The smaller sieve plate then further filters and intercepts smaller impurities, effectively improving screening efficiency and ensuring that the impurity content of the starch raw materials entering the subsequent process is significantly reduced. The support frame forms a sliding structure with a slider, a chute, and a housing, and the motor forms a transmission structure with the support frame through a gear and a rack. This allows the operator to precisely control the height of the support frame through the motor according to actual production needs. For example, when the raw material contains a high level of impurities, the height of the sieve plate can be appropriately lowered to increase the dwell time of the material on the sieve plate and improve the screening effect. If the raw material has fewer impurities, the sieve plate can be raised to speed up the material processing speed. A discharge hopper is provided on the side of the larger sieve plate, and the larger impurities that are screened out can be directly discharged through the discharge hopper, facilitating centralized cleaning. A collection tray is provided at the bottom of the smaller sieve plate to collect fine impurities after two screenings. The collection tray can be cleaned regularly, greatly reducing the workload and time cost of manual cleaning. 2. The present invention incorporates an adjustable feed assembly. The baffle forms a rotating structure with the feed hopper via a rotating shaft and is integrated with the rotating shaft. When the operator rotates the turntable, the worm gear fixedly connected to it rotates synchronously. Because the worm gear and worm gear form a meshing structure, the rotation of the worm gear drives the worm gear, which in turn rotates the rotating shaft fixedly connected to the worm gear, ultimately achieving adjustment of the baffle angle. This design allows precise control of the feed hopper opening size and flexible adjustment of the feed rate and flow rate of sweet potato starch based on the actual processing capacity of the sieve tray in the multi-stage pre-filtration assembly. For example, if the material accumulation rate on the sieve tray is too high, the baffle angle can be reduced by rotating the turntable to slow the feed rate. If the sieve tray is processing efficiently and the material is insufficient, the baffle angle can be increased to accelerate the feed rate, avoiding sieve tray blockage and low production efficiency due to improper feeding. The worm gear forms a rotating structure with bearings and support blocks and is integrated with the turntable. The bearings provide stable support for the worm gear's rotation, reducing friction and shaking during rotation and ensuring smooth transmission. This allows operators to experience smooth and precise operation when adjusting the feed rate, preventing over- or under-adjustment of the feed rate due to unstable transmission, further improving the accuracy of feed control. The meshing transmission structure composed of the worm gear and worm has excellent self-locking performance. After adjusting the baffle angle, even if the material in the feed hopper exerts a certain amount of pressure on the baffle, the self-locking characteristics of the worm gear and worm will prevent the baffle from easily changing its angle, ensuring the stability of the feed rate. At the same time, the worm gear transmission structure is relatively compact and takes up little space, achieving efficient and stable transmission within the limited space of the feed component, enhancing the stability and reliability of the entire equipment. 3. The present invention is provided with a multi-stage countercurrent cleaning component, and a baffle fixedly connected inside the cleaning tank has a height of four-fifths of the cleaning tank, and a gap is left between the bottom and the cleaning tank. This design causes the water flow to form a specific circuitous path in the cleaning tank. When the sweet potato starch material enters the cleaning tank, the water flow, guided by the baffle, can flush the material from multiple angles and directions. Compared with the traditional straight-cylinder cleaning tank, the contact time between the material and the water flow is longer and the contact area is larger, thereby effectively improving the cleaning efficiency, ensuring that the impurities on the surface of the starch particles are fully washed, and improving the purity of the starch. The external water pipe forms a connecting structure through the water pump, the outlet pipe and the outlet, and the outlets are arranged at equal intervals with respect to the outer wall of the outlet pipe. The water pump draws water in from the external water pipe, and sprays it evenly from each outlet through the outlet pipe, ensuring the uniformity of the water flow distribution in the cleaning tank. Whether in the center or the corners of the cleaning trough, the material is cleaned with the same water flow intensity, avoiding the problem of insufficient cleaning in certain areas and further ensuring the consistency and efficiency of the cleaning effect. A dust trough fixed to the bottom of the cleaning trough collects dust and fine impurities raised by the water flow during the cleaning process. A filter mesh snaps into the top of the dust trough to intercept larger impurities and prevent them from re-entering the cleaning area. Fine dust and impurities settle at the bottom of the dust trough and are regularly discharged through a drainage port at the bottom. This design not only purifies the cleaning water and reduces secondary contamination of starch by impurities, but also reduces wear and tear caused by impurity accumulation within the equipment, extending its service life. The inclined plate at the bottom of the baffle helps accelerate impurity sedimentation. During the cleaning process, some heavier impurities, driven by the water flow, slide down the inclined plate into the dust trough, improving the efficiency of impurity sedimentation, further enhancing impurity handling capabilities, and ensuring higher quality of the cleaned starch. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention as a whole; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention from a top view; Figure 3 Schematic diagram of the opened structure of the multi-stage pre-filtration assembly of the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the adjustable feeding assembly of the present invention; Figure 5It is a schematic cross-sectional perspective view of the multi-stage countercurrent cleaning assembly of the present invention.

[0020] In the figure: 1. Multi-stage pre-filtration assembly; 2. Adjustable feed assembly; 3. Multi-stage countercurrent cleaning assembly; 101. Housing; 102. Chute; 103. Slider; 104. First rotating shaft; 105. Motor; 106. Gear; 107. Rack; 108. Support frame; 109. Smaller sieve plate; 110. Discharge hopper; 111. Larger sieve plate; 112. Collection tray; 201. Feed hopper; 2 02. Material baffle; 203. Rotating shaft; 204. Worm gear; 205. Support block; 206. Bearing; 207. Worm; 208. Turntable; 301. Cleaning tank; 302. Inclined plate; 303. Baffle; 304. Dust suppression tank; 305. Filter; 306. Sewage outlet; 307. Discharge port; 308. External water pipe; 309. Water pump; 310. Water outlet; 311. Water outlet pipe. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1

[0023] like Figure 1 A floating water quality monitoring device is shown, comprising a multi-stage pre-filtration component 1, an adjustable feed component 2, and a multi-stage countercurrent cleaning component 3.

[0024] See also Figures 1 to 5The starch sand washing device for sweet potato starch production shown in the figure comprises a multi-stage pre-filtering component 1, an adjustable feeding component 2 is installed on the top of the multi-stage pre-filtering component 1, and a multi-stage countercurrent cleaning component 3 is installed on the side of the multi-stage pre-filtering component 1; the multi-stage pre-filtering component 1 comprises an outer shell 101, a chute 102 is fixedly connected to the inside of the outer shell 101, and a slider 103 is slidably connected to the inside of the chute 102, a support frame 108 is fixedly connected to the top of the slider 103, and a rack 107 is fixedly connected to the outer wall of the support frame 108, a gear 106 is meshed on the side of the rack 107, and a first rotating shaft 104 is fixedly connected to the inside of the gear 106, and a motor 105 is installed on the first rotating shaft 104, a smaller sieve plate 109 is fixedly connected to the inside of the support frame 108, and a smaller sieve plate 109 is fixedly connected to the inside of the support frame 108, and a smaller sieve plate 109 is fixedly connected to the inside of the support frame 108. A larger sieve plate 111 is provided on the top of the sieve plate 109, a discharge hopper 110 is provided on the side of the larger sieve plate 111, and a collecting plate 112 is provided at the bottom of the larger sieve plate 111; the support frame 108 forms a sliding structure with the outer shell 101 through the slider 103 and the slide 102, and the slider 103 and the support frame 108 are integrated; the smaller sieve plate 109 and the support frame 108 are integrated, and the larger sieve plate 111 and the support frame 108 are integrated, and the collecting plate 112 and the support frame 108 are integrated; the motor 105 forms a transmission structure with the support frame 108 through the gear 106 and the rack 107, and the gear 106 and the rack 107 are engaged with each other, and two gears 106 are symmetrically arranged about the horizontal central axis of the first rotating shaft 104.

[0025] See also Figure 4 The starch sand washing device shown in the figure is used for the production of sweet potato starch. The adjustable feeding component 2 includes a feeding hopper 201, a baffle plate 202 is provided inside the feeding hopper 201, and a rotating shaft 203 is fixedly connected to the inside of the baffle plate 202, and a worm gear 204 is fixedly connected to the end of the rotating shaft 203, a worm gear 207 is meshed with the side of the worm gear 204, and one end of the worm gear 207 is fixedly connected to a turntable 208, and the other end of the worm gear 207 is fixedly connected to a bearing 206, and the bottom of the bearing 206 is fixedly connected to a support block 205; the baffle plate 202 forms a rotating structure with the feeding hopper 201 through the rotating shaft 203, and the baffle plate 202 and the rotating shaft 203 are integrated; the worm gear 204 and the worm gear 207 form a meshing structure, and the worm gear 207 forms a rotating structure with the support block 205 through the bearing 206, and the worm gear 207 and the turntable 208 are integrated.

[0026] See also Figure 5The starch sand washing device for sweet potato starch production is shown, and the multi-stage countercurrent cleaning component 3 includes a cleaning tank 301, the interior of the cleaning tank 301 is fixedly connected with a baffle 303, and the bottom of the baffle 303 is provided with an inclined plate 302, the bottom of the cleaning tank 301 is fixedly connected with a dust reduction tank 304, and the top of the dust reduction tank 304 is snap-connected with a filter screen 305, and the bottom of the dust reduction tank 304 is fixedly connected with a sewage outlet 306, the end of the cleaning tank 301 is fixedly connected with a discharge port 307, and the side of the cleaning tank 301 is fixedly connected with a water pump 309, the side of the water pump 309 is fixedly connected with an external water pipe 308, and the end of the water pump 309 is fixedly connected There is a water outlet pipe 311, and the outer wall of the water outlet pipe 311 is fixedly connected with a water outlet 310; the cleaning tank 301 and the baffle 303 are integrated, and the height of the baffle 303 is four-fifths of the cleaning tank 301, and a gap is left between the bottom of the baffle 303 and the cleaning tank 301; the cleaning tank 301 and the dust reduction tank 304 are integrated, and the dust reduction tank 304 and the dust reduction tank 304 form a snap-fit structure, and the dust reduction tank 304 and the sewage outlet 306 form a connecting structure, the external water pipe 308 forms a connecting structure with the water outlet 310 through the water pump 309, the water outlet pipe 311, and the water outlet 310 is arranged at equal intervals about the outer wall of the water outlet pipe 311.

[0027] Working principle: In the production process of sweet potato starch, the starch sand washing device plays an important role. First, the adjustable feed component 2 starts to operate. The operator rotates the turntable 208, and since the worm 207 and the turntable 208 are integrated, the worm 207 rotates accordingly. Because the worm wheel 204 and the worm 207 form a meshing structure, the rotation of the worm 207 drives the worm wheel 204 to rotate. The rotating shaft 203 fixedly connected to the end of the worm wheel 204 is integrated with the baffle plate 202, so that the baffle plate 202 rotates in the feed hopper 201 through the rotating shaft 203, thereby adjusting the opening size of the feed hopper 201 and accurately controlling the feeding speed and flow rate of the sweet potato starch material.

[0028] Next, the material enters the multi-stage pre-filtration assembly 1. Motor 105 starts, driving first shaft 104 to rotate. Because gear 106 is fixedly connected to first shaft 104 and two gears 106 are symmetrically arranged about the horizontal center axis of first shaft 104, the two gears 106 rotate synchronously. Furthermore, because gear 106 meshes with rack 107, which is fixed to the outer wall of support frame 108, support frame 108 slides within chute 102 via slider 103, achieving up and down movement. The material first passes through larger sieve plate 111, where larger impurities are intercepted and discharged through discharge hopper 110. Smaller impurities and material continue through smaller sieve plate 109 for further screening, with fine impurities falling into collection plate 112. The smaller sieve plate 109, larger sieve plate 111, and collection plate 112 are all integrated with support frame 108 and can move with support frame 108, facilitating adjustment of the screening effect.

[0029] Subsequently, the pre-filtered material enters the multi-stage countercurrent cleaning assembly 3. The external water pipe 308 is connected to the water source, and the water pump 309 draws water in. The water is then sprayed out through the outlet pipe 311 from the water outlets 310 arranged at equal intervals on the outer wall to ensure that the water flow in the cleaning tank 301 is evenly distributed. The baffle 303 fixedly connected inside the cleaning tank 301 is four-fifths of the height of the cleaning tank 301, and there is a gap between the bottom and the cleaning tank 301. This allows the water flow to form a circuitous path in the cleaning tank 301, flushing the material from multiple angles. During the cleaning process, dust and fine impurities raised by the impact of the water flow fall into the dust removal trough 304 fixed to the bottom. The filter screen 305 snap-fitted to the top of the dust removal trough 304 intercepts larger particles of impurities, while fine dust and impurities settle at the bottom and are regularly discharged through the sewage outlet 306. The inclined plate 302 at the bottom of the baffle 303 helps accelerate the sedimentation of impurities, allowing some heavier impurities to slide down the inclined plate 302 into the dust reduction trough 304. The cleaned material is discharged from the discharge port 307 at the end of the cleaning trough 301, completing the entire sweet potato starch sand washing process. The coordinated operation of these components effectively improves the purity of the starch and production efficiency.

[0030] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A starch sand washing device for sweet potato starch production, characterized in that: It comprises a multi-stage pre-filtering assembly (1), wherein an adjustable feed assembly (2) is installed on the top of the multi-stage pre-filtering assembly (1), and a multi-stage countercurrent cleaning assembly (3) is installed on the side of the multi-stage pre-filtering assembly (1); The multi-stage pre-filtering assembly (1) comprises a housing (101), wherein the housing (101) is fixedly connected to a chute (102) inside, and the chute (102) is slidably connected to a slider (103) inside, the top of the slider (103) is fixedly connected to a support frame (108), and the outer wall of the support frame (108) is fixedly connected to a rack (107), the side of the rack (107) is meshed with a gear (106), and the inside of the gear (106) is fixedly connected to a first rotating shaft (104), and the first rotating shaft (104) is installed with a motor (105), the inside of the support frame (108) is fixedly connected to a smaller sieve plate (109), and a larger sieve plate (111) is provided on the top of the smaller sieve plate (109), a discharge hopper (110) is provided on the side of the larger sieve plate (111), and a collecting plate (112) is provided at the bottom of the larger sieve plate (111).

2. A starch sand washing device for sweet potato starch production according to claim 1, characterized in that: The support frame (108) forms a sliding structure through the slider (103), the slide groove (102) and the housing (101), and the slider (103) and the support frame (108) are integrated.

3. A starch sand washing device for sweet potato starch production according to claim 1, characterized in that: The smaller sieve plate (109) and the support frame (108) are integrated, the larger sieve plate (111) and the support frame (108) are integrated, and the collecting plate (112) and the support frame (108) are integrated.

4. A starch sand washing device for sweet potato starch production according to claim 1, characterized in that: The motor (105) forms a transmission structure through a gear (106), a rack (107) and a support frame (108), and the gear (106) and the rack (107) are meshed with each other, and two gears (106) are symmetrically arranged about the horizontal central axis of the first rotating shaft (104).

5. A starch sand washing device for sweet potato starch production according to claim 1, characterized in that: The adjustable feeding assembly (2) comprises a feeding hopper (201), a baffle plate (202) is provided inside the feeding hopper (201), a rotating shaft (203) is fixedly connected to the inside of the baffle plate (202), and a worm gear (204) is fixedly connected to the end of the rotating shaft (203), a worm gear (207) is meshed with a side of the worm gear (204), and one end of the worm gear (207) is fixedly connected to a turntable (208), and the other end of the worm gear (207) is fixedly connected to a bearing (206), and the bottom of the bearing (206) is fixedly connected to a support block (205).

6. A starch sand washing device for sweet potato starch production according to claim 5, characterized in that: The material baffle plate (202) forms a rotating structure with the feed hopper (201) via a rotating shaft (203), and the material baffle plate (202) and the rotating shaft (203) are integrally arranged.

7. A starch sand washing device for sweet potato starch production according to claim 5, characterized in that: The worm wheel (204) and the worm (207) form a meshing structure, and the worm (207) forms a rotating structure through the bearing (206) and the support block (205), and the worm (207) and the turntable (208) are integrated.

8. A starch sand washing device for sweet potato starch production according to claim 1, characterized in that: The multi-stage countercurrent cleaning assembly (3) comprises a cleaning trough (301), a baffle (303) fixedly connected to the interior of the cleaning trough (301), and an inclined plate (302) provided at the bottom of the baffle (303), a dust reduction trough (304) fixedly connected to the bottom of the cleaning trough (301), a filter screen (305) snap-fitted to the top of the dust reduction trough (304), and a sewage outlet (306) fixedly connected to the bottom of the dust reduction trough (304), a discharge port (307) fixedly connected to the end of the cleaning trough (301), and a water pump (309) fixedly connected to the side of the cleaning trough (301), an external water pipe (308) fixedly connected to the side of the water pump (309), a water outlet pipe (311) fixedly connected to the end of the water pump (309), and a water outlet (310) fixedly connected to the outer wall of the water outlet pipe (311).

9. A starch sand washing device for sweet potato starch production according to claim 8, characterized in that: The cleaning tank (301) and the baffle (303) are integrated, and the height of the baffle (303) is four-fifths of the cleaning tank (301), and a gap is left between the bottom of the baffle (303) and the cleaning tank (301).

10. A starch sand washing device for sweet potato starch production according to claim 8, characterized in that: The cleaning trough (301) and the dust reduction trough (304) are integrated, and the dust reduction trough (304) and the dust reduction trough (304) form a locking structure, and the dust reduction trough (304) and the sewage outlet (306) form a communication structure, and the external water pipe (308) forms a communication structure with the water outlet (310) through the water pump (309) and the water outlet pipe (311), and the water outlet (310) is arranged at equal intervals with respect to the outer wall of the water outlet pipe (311).

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