Grain and oil raw material pre-cleaning and impurity removing device

Abstract

The grain and oil raw material pre-cleaning and impurity-removing device comprises an outer shell and an inner barrel, the inner barrel comprises inner side plates, outer side plates, an upper frame and a lower frame, the lower frame is fixedly connected with the outer shell, the inner side plates are rotationally connected with the outer side plates, the outer side plates and the inner side plates are arranged in a staggered mode, and the upper frame is fixedly connected with the outer side plates. The upper frame comprises an inner adjusting ring and an outer adjusting ring, the inner side plate is rotationally connected with the inner adjusting ring, the outer side plate is rotationally connected with the outer adjusting ring, the head section and the tail section of the inner adjusting ring and the head section and the tail section of the outer adjusting ring are both semicircular and provided with threads, and the threads of the inner adjusting ring and the threads of the outer adjusting ring are matched with threaded cylinders. Aeration equipment is arranged at the bottom of the inner barrel, and water injection equipment is arranged at the top of the inner barrel. The grain and oil raw material pre-cleaning and impurity-removing device is wide in adaptation range and high in cleaning and impurity-removing efficiency.

Description

Technical Field

[0001] This invention relates to the field of grain and oil raw material cleaning technology, and in particular to a pre-cleaning and impurity removal device for grain and oil raw materials. Background Technology

[0002] Grain and oilseed raw materials (such as rice, wheat, corn, soybeans, rapeseed, and peanuts) are the core basic raw materials for grain and oil food processing. During harvesting, drying, transportation, and storage, they inevitably become mixed with solid impurities such as mud, dust, plant straw fragments, shriveled grains, and insect-damaged grains. At the same time, dust and other pollutants also adhere to the surface of the raw materials. Pre-cleaning and impurity removal is the first and most critical process in the grain and oil processing production line. Its treatment effect directly determines the processing stability and finished product quality of subsequent core processes such as milling, pressing, leaching, and refining.

[0003] Existing cleaning equipment mostly adopts a single fluid drive mode of unidirectional spraying and unidirectional aeration. Raw materials are prone to accumulation and stratification in the cavity, making it impossible to achieve uniform tumbling and mutual friction across the entire range. As a result, the cleanliness of the raw materials after cleaning is inconsistent. A few devices equipped with both water injection and aeration structures have cleaning cavities with equal diameters. Due to the significant differences in physical properties of different types of grain and oil raw materials, such as the large differences in density and particle size between soybeans, rapeseed, and sesame, the water flow field and impact force in the fixed cavity cannot meet the cleaning needs of different raw materials. It is impossible to control the fluid velocity at different heights in the cavity, resulting in a significant difference in the relative velocity between the raw materials and the fluid in the upper and lower sections of the cavity under the action of gravity. This easily leads to insufficient tumbling and incomplete cleaning of the upper section of raw materials, while the lower section of raw materials is damaged due to excessive impact from the fluid. It is impossible to simultaneously achieve both cleaning cleanliness and raw material integrity. Summary of the Invention

[0004] In view of the above-mentioned prior art, the present invention provides a pre-cleaning and impurity removal device for grain and oil raw materials, which has a wide range of applications and high cleaning and impurity removal efficiency.

[0005] To achieve the above objectives, the technical solution of this invention is implemented as follows: A pre-cleaning and impurity removal device for grain and oil raw materials includes an outer shell and an inner cylinder. The inner cylinder includes an inner side plate, an outer side plate, an upper frame, and a lower frame. The lower frame is fixedly connected to the outer shell. A plurality of the inner side plates and the outer side plates are rotatably connected. The outer side plates and the inner side plates are staggered. The upper frame includes an inner adjustment ring and an outer adjustment ring. The inner side plates are rotatably connected to the inner adjustment rings, and the outer side plates are rotatably connected to the outer adjustment rings. The first and last cross sections of the inner and outer adjustment rings are semi-circular and threaded. The threads of the inner and outer adjustment rings mate with a threaded cylinder. An aeration device is provided at the bottom of the inner cylinder, and a water injection device is provided at the top of the inner cylinder.

[0006] Furthermore, the outer side plate includes a rigid part and an elastic part, and the elastic part is provided on both sides of the rigid part. The rigid part is made of stainless steel, and the elastic part is made of rubber. The elastic part is attached to the back of the inner side plate.

[0007] Furthermore, there are multiple threaded cylinders, each with 2 to 3 threaded turns, and both ends of the threaded cylinder are chamfered.

[0008] Furthermore, the top of the outer shell is provided with a feeding port, and below the feeding port is a mesh plate that covers the top of the inner cylinder. The bottom of the outer shell is provided with a discharge port, and the discharge port is provided with a cover, which is threadedly connected to the discharge port.

[0009] Furthermore, a support rod is provided above the cover, and a lower mesh plate is provided above the support rod, the lower mesh plate being fitted to the bottom of the inner cylinder.

[0010] Furthermore, the water injection device includes a first pipe, a filter, a water pump, and a second pipe. The bottom of the outer shell is connected to the filter through the first pipe, the filter is connected to the water pump, and the water pump is connected to the second pipe. The second pipe is used to inject water into the upper end of the inner cylinder.

[0011] Furthermore, the aeration device includes an air pump, a third pipe, and an air distribution pipe. The air distribution pipe is located at the bottom of the inner cylinder and is connected to the air pump through the third pipe.

[0012] Furthermore, the outer casing is fixed to the frame, and a water storage tank is provided above the frame. The water storage tank is located above the outer casing, and its volume is larger than that of the outer casing. The second pipe includes a front pipe and a rear pipe, both of which are connected to the bottom of the water storage tank. The other end of the front pipe is connected to the inner cylinder, and the other end of the rear pipe is connected to the water pump. The top of the water storage tank is provided with an air valve that communicates with the atmosphere, and the rear pipe is provided with a flow regulating valve.

[0013] Furthermore, the air valve is an electromagnetic shut-off valve or a pressure relief valve.

[0014] Furthermore, the rear pipeline is equipped with a flow sensor, the water pump is a variable frequency water pump, and both the flow sensor and the solenoid valve are signal-connected to the controller, which is also signal-connected to the water pump.

[0015] The beneficial effects of this invention are as follows: 1. The device can flexibly adjust the opening diameter at the upper end of the inner cylinder by cooperating with the inner and outer adjusting rings and the threaded cylinder. It can accurately match the diameter difference between the upper and lower ends of the inner cylinder according to the density of different grain and oil raw materials, adapting to the cleaning needs of various types and densities of grain and oil raw materials, and greatly expanding the applicable scenarios of the device.

[0016] 2. On the one hand, the variable diameter structure design of the inner cylinder, where the upper diameter is smaller than the lower diameter, ensures that the water flow velocity at the upper end is greater than that at the lower end, thus maintaining a relatively consistent velocity difference between the water flow and air flow at different heights within the cylinder. This avoids uneven flow field, material accumulation, and blind spots in the cleaning process. On the other hand, the water flow from top to bottom and the aeration from bottom to top form a reverse convection, which can powerfully drive the grain and oil raw materials to continuously tumble, squeeze, and rub within the cylinder, efficiently and thoroughly removing impurities attached to the surface of the raw materials, significantly improving the cleaning cleanliness and impurity removal efficiency.

[0017] 3. The inner cylinder sidewall adopts a staggered inner and outer side plate structure. The gap between the inner side plates is covered by the outer side plates, and the gap between the outer side plates is sealed by the inner side plates, which ensures the flow of water and air and improves the product yield.

[0018] 4. The inner / outer adjusting ring adopts a semi-circular cross-section with threads at both ends, which can be quickly adjusted and locked in place when matched with the threaded cylinder. The operation is simple and convenient. The structure is highly stable after locking, which can resist the impact of water and air convection during the cleaning process and ensure long-term stability of the cleaning conditions.

[0019] 5. It adopts a purely physical cleaning method that combines water and air, relying on the flipping and friction between raw materials to remove impurities. No additional chemical cleaning agents are needed, which fully complies with the safety standards for grain and oil food processing, avoids chemical contamination of raw materials, and is clean and environmentally friendly, with no additional pollutants generated. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a grain and oil raw material pre-cleaning and impurity removal device in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the outer adjustment ring in an embodiment of this application; Figure 3 This is a schematic diagram of the outer side plate in an embodiment of this application; Figure 4 This is a schematic diagram of the circuit connection of a grain and oil raw material pre-cleaning and impurity removal device in an embodiment of this application; Explanation of icon numbers: 1. Outer shell; 2. Inner cylinder; 3. Inner side plate; 4. Outer side plate; 5. Upper frame; 6. Lower frame; 7. Inner adjusting ring; 8. Outer adjusting ring; 9. Threaded cylinder; 10. Aeration device; 11. Water injection device; 12. Rigid part; 13. Elastic part; 14. Feed port; 15. Mesh plate; 16. Discharge port; 17. Cover; 18. Support rod; 19. Lower mesh plate; 20. First pipe; 21. Filter; 22. Water pump; 23. Second pipe; 24. Air pump; 25. Third pipe; 26. Air distribution pipe; 27. Frame; 28. Water storage tank; 29. ​​Front pipe; 30. Rear pipe; 31. Air valve; 32. Flow regulating valve; 33. Flow sensor; 34. Controller. Detailed Implementation

[0021] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. In the following description, the expression "some embodiments" describes a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0022] It should also be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] Please refer to the attached document. Figures 1-4This application provides a pre-cleaning and impurity removal device for grain and oil raw materials, including an outer shell 1 and an inner cylinder 2. The inner cylinder 2 includes an inner side plate 3, an outer side plate 4, an upper frame 5, and a lower frame 6. The lower frame 6 is fixedly connected to the outer shell 1. Several inner side plates 3 and outer side plates 4 are rotatably connected. The outer side plates 4 and inner side plates 3 are staggered. The upper frame 5 includes an inner adjusting ring 7 and an outer adjusting ring 8. The inner side plates 3 are rotatably connected to the inner adjusting ring 7, and the outer side plates 4 are rotatably connected to the outer adjusting ring 8. The first and last cross sections of the inner adjusting ring 7 and the outer adjusting ring 8 are semi-circular and threaded. The threads of the inner adjusting ring 7 and the outer adjusting ring 8 are engaged with a threaded cylinder 9. An aeration device 10 is provided at the bottom of the inner cylinder 2, and a water injection device 11 is provided at the top of the inner cylinder 2. Water is added to the outer shell 1, and then the grain and oil raw materials are placed into the inner cylinder 2. The upper opening diameter of the inner cylinder 2 is adjusted according to the density of the grain and oil raw materials, so that the upper diameter of the inner cylinder 2 is smaller than the lower diameter. Specifically, the threads of the threaded cylinder 9 are engaged with the threads of the inner adjusting ring 7 and the outer adjusting ring 8. The cross-sections of both ends of the inner adjusting ring 7 and the outer adjusting ring are semi-circular. When the two ends of the inner / outer adjusting ring are fitted together, they form a circle. Therefore, after adjusting the inner / outer adjusting ring to the appropriate diameter, the threaded cylinder 9 is engaged with the threads of the inner / outer adjusting ring, thereby fixing the diameter of the inner / outer adjusting ring. The inner / outer adjusting ring is rotatably connected to the inner / outer outer plates 4, thereby causing the upper ends of the inner / outer outer plates 4 to converge inward, ultimately adjusting the diameter of the inner cylinder. The side wall of the inner cylinder is composed of the inner side plate 3 and the outer side plate 4, and the inner side plate 3 and the outer side plate 4 are staggered, that is, the gap between the inner side plates 3 is covered by the outer side plate 4, and the gap in the diameter of the outer side plate 4 is also covered by the inner side plate 3. During the cleaning process, water is simultaneously injected into the top of the inner cylinder 2 and air is aerated at the bottom. The water flows from top to bottom and the gas flows from bottom to top. The two fluids moving in opposite directions push the grain and oil raw materials in the inner cylinder. The upper diameter of the inner cylinder 2 is smaller than the lower diameter, so that the water flow speed at the upper end is greater than that at the lower end. This ensures that the speed difference between the water flow and air flow at different heights is basically the same, causing them to tumble, squeeze, and rub in the inner cylinder, thus cleaning the impurities on the surface of the grain and oil raw materials.

[0024] Specifically, the outer side plate 4 includes a rigid portion 12 and an elastic portion 13. The elastic portion 13 is provided on both sides of the rigid portion 12. The rigid portion 12 is made of stainless steel, and the elastic portion 13 is made of rubber. The elastic portion 13 is in contact with the back of the inner side plate 3. The rigid portion 12, made of stainless steel, provides stable support, allowing the outer side plate 4 to maintain its shape under stress. Simultaneously, the elastic portion 13, made of rubber, is provided on both sides of the outer side plate 4. Under the action of elasticity, it fits against the inner side plate 3, reducing the gap between the inner side plate 3 and the outer side plate 4, allowing water and gas to flow within the inner cylinder 2.

[0025] Specifically, there are multiple threaded cylinders 9, each with 2 to 3 threaded turns, and both ends of each threaded cylinder 9 are chamfered. The fewer the number of threaded turns of the threaded cylinder 9, the shorter its engagement length with the inner adjusting ring 7 or the outer adjusting ring 8. When the diameters of the inner adjusting ring 7 and the outer adjusting ring 8 change, the threaded cylinder 9 can maintain a mating relationship with either the inner or outer adjusting ring 7. By using multiple threaded cylinders 9 to constrain the inner and outer adjusting rings 7 and 8, the stability of the inner and outer adjusting rings 7 and 8 is improved.

[0026] Specifically, the outer shell 1 has a feeding port 14 at its top, and a mesh plate 15 covering the top of the inner cylinder 2 is located below the feeding port 14. The outer shell 1 has a discharge port 16 at its bottom, and the discharge port 16 has a cover 17, which is threadedly connected to the discharge port 16. Grain and oil raw materials are fed into the inner cylinder 2 through the feeding port 14, and then the mesh plate 15 covers the top opening of the inner cylinder 2. The mesh plate 15 can be fixed to the top of the inner cylinder 2 using conventional methods such as snap-fit, magnetic attraction, or wire fixing. After the grain and oil raw materials are pre-cleaned, the cover 17 is opened, and the grain and oil raw materials are discharged from the discharge port 16.

[0027] Specifically, a support rod 18 is provided above the cover 17, and a lower mesh plate 19 is provided above the support rod 18. The lower mesh plate 19 is attached to the bottom of the inner cylinder 2. After the cover 17 is placed over the discharge port 16, the lower mesh plate 19 on the cover 17 is attached to the bottom of the inner cylinder 2. The lower mesh plate 19 intercepts the grain and oil raw materials, allowing them to be cleaned in the inner cylinder.

[0028] Specifically, the water injection device 11 includes a first pipe 20, a filter 21, a water pump 22, and a second pipe 23. The bottom of the outer shell 1 is connected to the filter 21 via the first pipe 20. The filter 21 is connected to the water pump 22, and the water pump 22 is connected to the second pipe 23. The second pipe 23 is used to inject water into the upper part of the inner cylinder 2. The water inside the outer shell flows back to the upper part of the inner cylinder after passing through the first pipe 20, the filter 21, the water pump 22, and the second pipe 23, forming a water circulation. The water pump 22 provides power during the water circulation process. The water enters from the top of the inner cylinder 2, flows to the bottom of the inner cylinder 2, passes through the lower mesh plate 19, and then circulates back from the water injection device 11.

[0029] Specifically, the aeration device 10 includes an air pump 24, a third pipe 25, and an air distribution pipe 26. The air distribution pipe 26 is located at the bottom of the inner cylinder 2, and it is connected to the air pump 24 through the third pipe 25. The air pump 24 generates high-pressure gas, which is transported to the air distribution pipe 26 through the third pipe 25 and then discharged through the air distribution pipe 26 to form upward-flowing bubbles.

[0030] Specifically, the outer casing 1 is fixed to the frame 27. A water tank 28 is located above the frame 27, and the volume of the water tank 28 is larger than that of the outer casing 1. The second pipe 23 includes a front pipe 29 and a rear pipe 30, both of which are connected to the bottom of the water tank 28. The other end of the front pipe 29 is connected to the inner cylinder 2, and the other end of the rear pipe 30 is connected to the water pump 22. The top of the water tank 28 is equipped with an air valve 31 that communicates with the atmosphere, and the rear pipe 30 is equipped with a flow regulating valve 32. The frame 27 is used to fix the outer casing 1, and the water tank 28 is located above the frame 27. The position of the water tank 28 is higher than that of the outer casing 1, and the water in the water tank 28 can flow naturally into the outer casing 1 under the action of gravity. The volume of the water storage tank 28 is larger than that of the outer shell 1. After cleaning, the flow regulating valve 32 is closed, and the air valve 31 is opened. Then, the water pump 22 is used to pump water into the water storage tank 28. Finally, the cover 17 is opened to discharge the grain and oil raw materials. Next, the cover 17 is closed, and the force regulating valve and air valve 31 are opened to allow the water in the water storage tank 28 to flow into the inner cylinder 2. After the water level in the outer shell 1 is higher than that in the inner cylinder 2, the air valve 31 is closed and the water pump 22 is turned on, allowing the water pump 22 to pump water into the water storage tank 28. Since the air cannot be discharged from the water storage tank 28 after the air valve 31 is closed, the water discharge rate of the water storage tank 28 will increase after the water pump 22 starts working. The water flow is further controlled by the flow regulating valve 32 on the rear pipe 30.

[0031] Specifically, the air valve 31 is either a solenoid shut-off valve or a pressure relief valve. The airflow channel can be directly closed via the solenoid valve, or the pressure relief valve can automatically release gas. When the air pressure in the water tank 28 is too high, the gas is discharged from the pressure relief valve.

[0032] Specifically, the rear pipe 30 is equipped with a flow sensor 33, and the water pump 22 is a variable frequency water pump 22. Both the flow sensor 33 and the solenoid valve are signal-connected to the controller 34, which is also signal-connected to the water pump 22. The flow sensor 33 detects the water flow velocity in the rear pipe 30 and transmits the detected signal to the controller 34. The controller 34 adjusts the output power of the water pump 22 according to the flow rate, ensuring that the output flow rate of the water pump 22 is essentially consistent with the water flow rate.

[0033] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pre-cleaning and impurity removal device for grain and oil raw materials, characterized in that, The device includes an outer shell (1) and an inner cylinder (2). The inner cylinder (2) includes an inner side plate (3), an outer side plate (4), an upper frame (5), and a lower frame (6). The lower frame (6) is fixedly connected to the outer shell (1). Several inner side plates (3) and outer side plates (4) are rotatably connected. The outer side plates (4) and inner side plates (3) are staggered. The upper frame (5) includes an inner adjustment ring (7) and an outer adjustment ring (8). The inner side plate (3) is rotatably connected to the inner adjustment ring (7). The outer side plate (4) is rotatably connected to the outer adjustment ring (8). The inner adjustment ring (7) and outer adjustment ring (8) have semi-circular cross sections at both ends and are threaded. The threads of the inner adjustment ring (7) and outer adjustment ring (8) are engaged with a threaded cylinder (9). An aeration device (10) is provided at the bottom of the inner cylinder (2). A water injection device (11) is provided at the top of the inner cylinder (2).

2. The pre-cleaning and impurity removal device for grain and oil raw materials according to claim 1, characterized in that, The outer side plate (4) includes a rigid part (12) and an elastic part (13). The elastic part (13) is provided on both sides of the rigid part (12). The rigid part (12) is made of stainless steel, and the elastic part (13) is made of rubber. The elastic part (13) is attached to the back of the inner side plate (3).

3. The pre-cleaning and impurity removal device for grain and oil raw materials according to claim 1, characterized in that, There are multiple threaded cylinders (9), each threaded cylinder (9) has 2 to 3 threaded turns, and both ends of the threaded cylinder (9) are chamfered.

4. The pre-cleaning and impurity removal device for grain and oil raw materials according to claim 1, characterized in that, The outer shell (1) has a feeding port (14) at the top, and a mesh plate (15) covering the top of the inner cylinder (2) is provided below the feeding port (14). The outer shell (1) has a discharge port (16) at the bottom, and the discharge port (16) has a cover (17) which is threadedly connected to the discharge port (16).

5. The pre-cleaning and impurity removal device for grain and oil raw materials according to claim 1, characterized in that, A support rod (18) is provided above the cover (17), and a lower mesh plate (19) is provided above the support rod (18). The lower mesh plate (19) is attached to the bottom of the inner cylinder (2).

6. The pre-cleaning and impurity removal device for grain and oil raw materials according to claim 1, characterized in that, The water injection device (11) includes a first pipe (20), a filter (21), a water pump (22), and a second pipe (23). The bottom of the outer shell (1) is connected to the filter (21) through the first pipe (20). The filter (21) is connected to the water pump (22). The water pump (22) is connected to the second pipe (23). The second pipe (23) is used to inject water into the upper end of the inner cylinder (2).

7. The pre-cleaning and impurity removal device for grain and oil raw materials according to claim 1, characterized in that, The aeration device (10) includes an air pump (24), a third pipe (25) and an air distribution pipe (26). The air distribution pipe (26) is provided at the bottom of the inner cylinder (2). The air distribution pipe (26) is connected to the air pump (24) through the third pipe (25).

8. The pre-cleaning and impurity removal device for grain and oil raw materials according to claim 7, characterized in that, The outer shell (1) is fixed on the frame (27). A water storage tank (28) is provided above the frame (27). The water storage tank (28) is located above the outer shell (1). The volume of the water storage tank (28) is greater than the volume of the outer shell (1). The second pipe (23) includes a front pipe (29) and a rear pipe (30). Both the front pipe (29) and the rear pipe (30) are connected to the bottom of the water storage tank (28). The other end of the front pipe (29) is connected to the inner cylinder (2). The other end of the rear pipe (30) is connected to the water pump (22). The top of the water storage tank (28) is provided with an air valve (31) that is connected to the atmosphere. The rear pipe (30) is provided with a flow regulating valve (32).

9. The pre-cleaning and impurity removal device for grain and oil raw materials according to claim 8, characterized in that, The air valve (31) is an electromagnetic shut-off valve or a pressure relief valve.

10. The pre-cleaning and impurity removal device for grain and oil raw materials according to claim 9, characterized in that, The rear pipe (30) is equipped with a flow sensor (33), the water pump (22) is a variable frequency water pump (22), the flow sensor (33) and the solenoid valve are both connected to the controller (34) by signal, and the controller (34) is connected to the water pump (22) by signal.

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