Cleaning device for rice production

Abstract

The invention relates to the technical field of rice production and processing equipment, and particularly discloses a rice production cleaning device which comprises a rack, a cleaning cylinder, a stirring mechanism and a friction mechanism, the stirring mechanism comprises a stirring shaft, the stirring shaft extends into the cleaning cylinder, and the stirring shaft and the cleaning cylinder are coaxially and rotatably connected; the friction mechanism comprises a first friction body and a second friction body, the first friction body and the second friction body move relatively and are both connected with the rack, a friction space is formed between the first friction body and the second friction body, one end of the friction space communicates with the cleaning cylinder, and rice particles make contact with the first friction body and the second friction body at the same time; the resultant force of the acting force of the first friction body and the second friction body on the rice particles is far away from the cleaning cylinder. Through the stirring mechanism and the friction mechanism, rice particles are sequentially subjected to water adding, mixed cleaning and friction cleaning, and the cleaning device has a high cleaning effect on impurities with different adhesive force on the surfaces of the rice particles.

Description

Technical Field

[0001] The present invention relates to the technical field of rice production and processing equipment, and particularly relates to a rice production and cleaning device. Background Art

[0002] Rice is the finished product made after processes such as cleaning, hulling, milling, and finished product finishing of paddy. Rice contains nearly 64% of the nutrients in paddy and more than 90% of the nutrients required by the human body. After harvesting paddy, it is necessary to dehull the rice. After corresponding hulling and milling processes, impurities such as dust and sediment will adhere to the surface of the rice, and a special cleaning device is needed to clean the rice.

[0003] In related technologies, the device for cleaning rice mainly uses the method of adding clean water and stirring for treatment. For example, the Chinese patent document with the publication number CN110899225B discloses a rice soaking and cleaning device, including a horizontally conveyed conveyor belt, and also includes a power unit and several cleaning units. The cleaning unit includes a cleaning bottle and an elastic stirring rod. The upper end of the cleaning bottle is an open end, and there is a bayonet on the conveyor belt for the open end of the cleaning bottle to be embedded. A cleaning cavity for accommodating rice is provided inside the cleaning bottle. The lower end of the stirring rod passes through the cleaning bottle and is connected to the power unit. The stirring rod is rotatably connected to the cleaning bottle, and several water outlet holes are provided on the side wall of the cleaning bottle. Rice and water are added into the cleaning bottle, and the rotating shaft rotates to stir them. After stirring, the water outlet holes are opened to drain the water in the bottle, and then the cleaning bottle is tilted to discharge the rice.

[0004] In the above solution, the rotation of the rotating shaft drives the mixture in the cleaning bottle to circulate and rotate. The force on the rice has a high regularity. In a limited time, the degree of contact friction between the rice grains and water, the rotating shaft (including the first rod and the second rod), or the inner wall of the cleaning bottle is relatively low, that is, the force on the surface of the rice grains is small, and the impurities firmly adhered to the surface are difficult to detach from the rice grains, resulting in incomplete cleaning of the rice. Summary of the Invention

[0005] The present invention provides a rice production and cleaning device, aiming to solve the problem that the impurities firmly adhered to the surface of rice in related technologies are difficult to detach.

[0006] A rice production cleaning device of the present invention includes a frame, on which a cleaning cylinder and a stirring mechanism are provided. The cleaning cylinder is provided with a feeding port and a discharging port. The stirring mechanism includes a stirring shaft and a first driving source. The stirring shaft extends into the cleaning cylinder and they are coaxial. The first driving source is used to control the rotation of the stirring shaft relative to the cleaning cylinder. It further includes a friction mechanism, which includes a first friction body and a second friction body. The first friction body and the second friction body are relatively movable and are both connected to the frame. A friction space is formed between the first friction body and the second friction body. One end of the friction space is communicated with the discharging port of the cleaning cylinder. Rice grains are in contact with both the first friction body and the second friction body at the same time. The resultant force direction of the forces exerted on the rice grains by the first friction body and the second friction body is in the direction away from the discharging port. A receiving sieve plate is provided on the frame at the end of the friction space away from the discharging port, and the receiving sieve plate is lower than the friction space.

[0007] The effect is that: the stirring mechanism and the friction mechanism sequentially clean the rice grains. The stirring mechanism removes the dust and impurities with low adhesion on the rice grains by mixing and soaking the rice grains with water and stirring. Then the rice grains enter the friction space, and their surfaces come into contact and friction with the first friction body and the second friction body. The impurities adhered to the surface of the rice grains are subjected to stronger forces, so they are more likely to break away from the surface. While in contact with the first friction body and the second friction body, the resultant force generated by the two on the rice grains causes the rice grains in the friction space to move away from the cleaning cylinder and finally leave the friction space and fall into the receiving sieve plate. The dust and impurities separated from the rice grains pass through the receiving sieve plate along with the water, realizing the separation of the rice grains and the water.

[0008] Preferably, the first friction body is a belt, the second friction body is a rubber pad, and the friction mechanism further includes a transmission belt pulley. The transmission belt pulley is rotatably connected to the frame. The belt is wound around the transmission belt pulley. The rubber pad is fixedly connected to the frame. The side of the belt facing the rubber pad is in contact with the rice grains, and the moving direction of the position where the belt is in contact with the rice grains is in the direction away from the cleaning cylinder.

[0009] The effect is that: during the rotation of the transmission belt pulley, the side of the belt facing the rice grains can drive the rice grains to move in the same direction, so that the rice grains in the friction space can continuously move towards the end of the friction space away from the relay pipe and finally move out of the friction space. Since the rice is an irregularly shaped particle, when the belt moves continuously and stably, the frictional forces on the surface of the rice grains by the belt and the rubber pad surface accelerate the detachment of the impurities attached to the surface of the rice grains.

[0010] Preferably, a water injection hole is formed in the second friction body, the water injection hole communicates with the friction space, a water injection channel is formed in the frame, the water injection channel communicates with one end of the water injection hole away from the friction space, the friction mechanism further includes a limiting plate, the limiting plate is located at the side edge of the friction space, the limiting plate contacts with the first friction body and the second friction body at the same time, and an overflow hole is formed through the limiting plate, and the overflow hole communicates with the friction space.

[0011] The effect is that new clean water can be continuously injected into the friction space through the water injection channel and the water injection hole, and the water flow formed in the friction space can take out the impurities separated from the rice grains due to the friction action from the overflow hole together. At the same time, the limiting plate forms a limit on the side of the friction space to prevent the rice grains from flowing out from the side of the friction space.

[0012] Preferably, the length direction of the friction space is the horizontal direction, the friction mechanism further includes a third friction body, the third friction body is a synchronous belt, the friction mechanism further includes a serrated pulley, the serrated pulley is rotatably arranged on the frame, the synchronous belt is wound around the serrated pulley, the side of the synchronous belt facing the friction space is flush with the side of the second friction body facing the rice grains, and the transmission direction of the synchronous belt is the horizontal direction and is perpendicular to the transmission direction of the first friction body.

[0013] The effect is that the rotation of the serrated pulley drives the third friction body to travel around. Since the traveling direction of the synchronous belt is perpendicular to the transmission direction of the first friction body, the direction of the frictional force generated by the third friction body on the rice grains and the direction of the frictional force generated by the first friction body on the rice grains are staggered with each other, thereby increasing the diversity of the directions of the frictional forces received on the surface of the rice grains, and thus increasing the probability of successful detachment of the impurities attached to the surface thereof.

[0014] Preferably, there are a plurality of the third friction bodies, and the plurality of third friction bodies are arranged in an array along the length direction of the friction space, the traveling directions of adjacent synchronous belts are opposite, and the friction mechanism further includes a control component for controlling the rotation of the serrated pulley.

[0015] The effect is that the running directions of the third friction bodies are different from each other, so the directions of the frictional forces generated on the rice grains are also diverse, making the stress conditions of the impurities attached to the surface of the rice grains more complex.

[0016] Preferably, the control assembly includes a drive shaft and a commutation auxiliary shaft. The plurality of serrated pulleys include a plurality of first pulleys and a plurality of second pulleys. Both the drive shaft and the commutation auxiliary shaft are rotatably connected to the frame. The first pulleys are coaxially and relatively fixed on the drive shaft. The second pulleys are coaxially rotatably connected to the drive shaft. The axes of the drive shaft and the commutation auxiliary shaft are parallel and have the same rotation direction. A force-bearing gear is coaxially and fixedly connected to the second pulley. A transmission gear is coaxially fixed on the commutation auxiliary shaft. The transmission gear meshes with the force-bearing gear.

[0017] The effect is that: the first pulleys rotate synchronously with the drive shaft, the transmission gear rotates synchronously with the commutation auxiliary shaft, the force-bearing gear receives the torque from the transmission gear. When the rotation directions of the drive shaft and the commutation auxiliary shaft are the same, the rotation directions of the second pulleys and the first pulleys are opposite, so that the running directions of the synchronous belts bypassing the first pulleys and the synchronous belts bypassing the second pulleys are opposite.

[0018] Preferably, it further includes a second drive source, which is used to control the axial movement of the stirring shaft. The discharge port and the cleaning cylinder are coaxial and located at the bottom end of the cleaning cylinder. The bottom end of the cleaning cylinder is in a funnel shape. A relay pipe is fixedly connected to the lower end of the cleaning cylinder. The discharge port is located at the upper end of the relay pipe. The stirring shaft is selectively inserted into the discharge port to block the discharge port.

[0019] The effect is that: the axial movement of the stirring shaft controls the opening and closing of the discharge port. After the discharge port is opened, the water and rice grains in the cleaning cylinder slide down to the discharge port under the action of gravity and then leave the cleaning cylinder.

[0020] Preferably, the axis of the stirring shaft is in the vertical direction. The stirring shaft includes a main body part and an extension part. The extension part is located below the main body part and they are coaxial. An adjusting sleeve is coaxially and slidably arranged on the stirring shaft between the main body part and the extension part. A clearance ring is coaxially and fixedly connected to the adjusting sleeve. An adjusting spring is connected between the adjusting sleeve and the stirring shaft. An elastic pad is fixedly connected to the inner bottom wall of the cleaning cylinder. When the extension part is inserted into the discharge port, the clearance ring abuts against the elastic pad, and the adjusting spring applies a downward thrust to the adjusting sleeve.

[0021] The effect is that: after the stirring shaft is withdrawn from the discharge port, the adjusting sleeve rebounds downward by a certain distance, and a gap for the rice grains to pass through is formed between the clearance ring and the inner wall of the bottom of the cleaning cylinder, which is convenient for controlling the flow rate of the rice grains and at the same time reduces the probability of the formation of the material arch phenomenon.

[0022] Preferably, a clear water channel and a return water channel are formed in the stirring shaft along its length direction. The stirring shaft is provided with clear water holes and return water holes. The clear water holes are communicated with the clear water channel, and the return water holes are communicated with the return water channel. The clear water channel is externally connected to a water source, and the return water channel is externally connected to a water pump. The clear water holes and the return water holes are arranged axially staggered along the stirring shaft.

[0023] Preferably, a filter rack is fixedly connected between the adjusting sleeve and the clearance ring. The return water holes are located in the extension part, and the clear water holes are located in the main body part.

[0024] The effect is that the cleaning cylinder is filled with water and pumped through the clear water channel and the return water channel. The clear water channel, the clear water holes, the return water channel, and the return water holes do not interfere with each other. The clear water sprayed out of the clear water holes directly contacts the rice grains in the cleaning cylinder, and the water after contacting the rice grains needs to pass through the filter rack before entering the return water holes, reducing the risk of the return water holes being blocked by rice grains.

[0025] Adopting the above technical solutions, the beneficial effects of the present invention are as follows: Through the settings of the stirring mechanism and the friction mechanism in the present invention, the rice grains are first mixed with water and stirred to remove the impurities with relatively low adhesion on their own surfaces, and then leave the cleaning cylinder and enter the friction space. Under the friction of the first friction body, the second friction body, and the third friction body, the impurities with relatively high adhesion on their own surfaces are also removed. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the overall structure of the rice production and cleaning device in the embodiment of the present invention.

[0027] Figure 2 It is Figure 1 The partial enlarged view of part A in

[0028] Figure 3 It is a schematic cross-sectional view of the structure when the stirring shaft moves to open the discharge port in the embodiment of the present invention.

[0029] Figure 4 It is a top view of the cross-section of the main body part of the stirring shaft in the embodiment of the present invention.

[0030] Figure 5 It is a schematic diagram of the structure of the lower end part of the stirring shaft in the embodiment of the present invention.

[0031] Figure 6 It is a schematic cross-sectional view of the structure of the first friction body and the second friction body in the embodiment of the present invention.

[0032] Figure 7 It is a schematic cross-sectional view of the structure of the first friction body and the third friction body in the embodiment of the present invention.

[0033] Figure 8 It is a schematic structural diagram showing the control component in the embodiments of the present invention.

[0034] Figure 9 is Figure 1 a partial enlarged view of part B in

[0035] Reference numerals: 1, frame; 11, cleaning cylinder; 12, feeding port; 13, discharging port; 131, relay pipe; 14, drain hole; 15, receiving sieve plate; 16, vibrating roller; 17, water injection channel; 18, waste water tank; 2, stirring mechanism; 21, stirring shaft; 211, main body part; 212, extension part; 213, clean water channel; 214, return water channel; 215, clean water hole; 216, return water hole; 217, water receiving ring pipe; 22, adjusting sleeve; 23, adjusting spring; 24, clearance ring; 241, filter rack; 25, elastic pad; 26, drive box; 27, first drive source; 28, second drive source; 3, friction mechanism; 31, first friction body; 311, transmission belt pulley; 32, second friction body; 321, water injection hole; 33, limiting plate; 331, overflow hole; 34, third friction body; 341, serrated belt pulley; 3411, first belt pulley; 3412, second belt pulley; 35, control component; 351, control motor; 352, drive shaft; 353, reversing auxiliary shaft; 354, stress gear; 355, transmission gear; 356, input gear; 357, output gear; 358, connecting gear; 36, friction space. Detailed implementation manners

[0036] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0037] The following will be combined with Figures 1 to 9 to describe a rice production and cleaning device of the present invention.

[0038] This embodiment discloses a rice production and cleaning device, as Figure 1 shown, which includes a frame 1, a cleaning cylinder 11, a stirring mechanism 2 and a friction mechanism 3; the cleaning cylinder 11 is fixedly connected to the frame 1, clean water and rice grains to be cleaned are added into the cleaning cylinder 11 for mixing, the stirring mechanism 2 stirs the mixture in the cleaning cylinder 11, and after mixing and stirring, the friction mechanism 3 is used for further friction cleaning of the rice grains.

[0039] As Figure 1As shown in the figure, the cleaning cylinder 11 is cylindrical, with its axis in the vertical direction. The stirring mechanism 2 includes a stirring shaft 21, a first driving source 27, a second driving source 28 and a driving box 26. The driving box 26 is slidably connected to the cleaning cylinder 11 in the vertical direction. The first driving source 27 is a motor, and the second driving source 28 is an oil cylinder. The oil cylinder is fixedly connected to the frame 1, and its piston rod is coaxial with the cleaning cylinder 11. The driving box 26 is fixedly connected to the piston rod of the oil cylinder. The motor is fixedly connected to the driving box 26. The stirring shaft 21 is rotatably connected to the driving box 26 and is coaxially and fixedly connected to the output shaft of the motor. The stirring shaft 21 extends into the cleaning cylinder 11 and is coaxial with the cleaning cylinder 11. The second driving source 28 can control the vertical movement of the stirring shaft 21, and the first driving source 27 can control the rotation of the stirring shaft 21.

[0040] As Figure 1 , Figure 2 and Figure 3 shown in the figure, the cleaning cylinder 11 is provided with a feeding port 12 and a discharging port 13. The feeding port 12 is located on one side of the cleaning cylinder 11 and close to the upper end of the cleaning cylinder 11. The bottom end of the cleaning cylinder 11 is funnel-shaped, and the discharging port 13 is located at the center of the bottom of the cleaning cylinder 11, that is, the bottom of the funnel. The rice grains to be cleaned are added into the cleaning cylinder 11 through the feeding port 12 and finally leave through the discharging port 13. The stirring shaft 21 includes a main body part 211 and an extension part 212 which are fixedly connected to each other. The extension part 212 is located below the main body part 211 and they are coaxial. The diameter of the discharging port 13 is the same as the radial dimension of the extension part 212. When the stirring shaft 21 moves vertically and the extension part 212 is inserted into the discharging port 13, the discharging port 13 is blocked and the rice grains cannot leave through the discharging port 13.

[0041] As Figure 2 , Figure 3 and Figure 4 shown in the figure, a clean water channel 213 and a return water channel 214 are arranged along the length direction of the stirring shaft 21. A plurality of clean water holes 215 and a plurality of return water holes 216 are arranged on the side wall of the stirring shaft 21. The clean water holes 215 are communicated with the clean water channel 213, and the return water holes 216 are communicated with the return water channel 214. Two water receiving ring pipes 217 are fixedly connected to the driving box 26. The water receiving ring pipes 217 are coaxially sleeved outside the stirring shaft 21. The clean water channel 213 is externally connected to a clean water source through the water receiving ring pipes 217, and the return water channel 214 is externally connected to a water pump through the water receiving ring pipes 217. The clean water holes 215 and the return water holes 216 are arranged alternately along the axial direction of the stirring shaft 21, that is, the clean water channel 213, the clean water holes 215 and the return water channel 214, the return water holes 216 do not interfere with each other. The clean water holes 215 are used to inject clean water into the cleaning cylinder 11, and the diameter of the return water holes 216 is smaller than the minimum radial dimension of the rice grains, and they are used to suck the water in the cleaning cylinder 11.

[0042] As Figure 2 , Figure 3 andFigure 5 As shown, the water cleaning hole 215 is located on the side wall of the main body part 211, and the water return hole 216 is located on the side wall of the extension part 212. An adjustment sleeve 22 is coaxially and slidably arranged on the stirring shaft 21 between the main body part 211 and the extension part 212. The adjustment sleeve 22 is coaxially sleeved outside the extension part 212. An adjustment spring 23 is connected between the adjustment sleeve 22 and the stirring shaft 21. A clearance ring 24 is coaxially and fixedly connected to the adjustment sleeve 22. A filter rack 241 is fixedly connected between the adjustment sleeve 22 and the clearance ring 24. The pore size of the filter rack 241 is smaller than the radial dimension of the rice grains; an elastic pad 25 made of rubber is fixedly connected to the inner bottom wall of the cleaning cylinder 11. When the extension part 212 is inserted into the discharge port 13, the adjustment spring 23 applies a downward thrust to the adjustment sleeve 22, and the clearance ring 24 abuts against the elastic pad 25. The water return hole 216 is located inside the clearance ring 24. After the water pump is turned on, the water in the cleaning cylinder 11 can pass through the filter rack 241 and enter the water return hole 216. The second driving source 28 controls the lifting of the driving box 26, the extension part 212 is removed from the discharge port 13 and the clearance ring 24 also disengages from the contact with the elastic pad 25. The adjustment sleeve 22 slides down and closes the water return hole 216. The distance between the clearance ring 24 and the elastic pad 25 can allow the rice grains to pass through. At this time, the rice and water in the cleaning cylinder 11 can flow out of the cleaning cylinder 11 through the discharge port 13.

[0043] As Figure 1 and Figure 6As shown in the figure, a relay pipe 131 is fixedly connected to the lower end of the cleaning cylinder 11. The discharge port 13 is located at the upper end of the relay pipe 131. The rice grains and water in the cleaning cylinder 11 enter the relay pipe 131 after leaving the cleaning cylinder 11. The overall extending trajectory of the relay pipe 131 is in an L shape. The friction mechanism 3 includes a first friction body 31 and a second friction body 32. The first friction body 31 and the second friction body 32 are relatively movable and are both connected to the frame 1. The first friction body 31 is a belt, and the second friction body 32 is a rubber pad. The friction mechanism 3 further includes a transmission belt pulley 311, and the transmission belt pulley 311 is rotatably connected to the frame 1. A motor (not shown in the figure) for driving the transmission belt pulley 311 to rotate is further provided in the frame 1; the belt is wound around the transmission belt pulley 311, and its transmission direction is horizontal. The rubber pad is fixedly connected to the frame 1, with the rubber pad below and the belt above, forming a friction space 36 therebetween. The length direction of the friction space 36 is the transmission direction of the belt. The end of the relay pipe 131 communicates with one end of the friction space 36. After the rice grains leave the relay pipe 131, they enter the friction space 36. The rice grains are in contact with both the first friction body 31 and the second friction body 32 at the same time. The moving direction of the position where the belt contacts the rice grains is away from the cleaning cylinder 11. That is, during the rotation of the transmission belt pulley 311, the resultant force direction of the forces exerted by the first friction body 31 and the second friction body 32 on the rice grains is away from the discharge port 13, so that the rice grains in the friction space 36 can continuously move towards the end of the friction space 36 away from the relay pipe 131. At the same time, the frictional force on the surface of the rice grains by the surfaces of the belt and the rubber pad promotes the impurities attached to the surface of the rice grains to be separated more quickly.

[0044] As Figure 1 and Figure 6 As shown in the figure, the friction mechanism 3 further includes a limiting plate 33. The limiting plate 33 is fixedly connected to the frame 1. There are two limiting plates 33, which are respectively located at the side edges of the friction space 36. The limiting plate 33 is in contact with both the first friction body 31 and the second friction body 32 at the same time. The plate surface of the limiting plate 33 is a vertical plane and is perpendicular to the axis of the transmission belt pulley 311, so as to block both sides of the friction space 36. A plurality of water injection holes 321 are opened on the second friction body 32. One end of the water injection hole 321 communicates with the friction space 36. A water injection channel 17 is opened on the frame 1, and the water injection channel 17 communicates with the end of the water injection hole 321 away from the friction space 36; an overflow hole 331 is penetrated through the limiting plate 33, and the overflow hole 331 communicates with the friction space 36. The aperture of the overflow hole 331 is smaller than the radial dimension of the rice grains. The water injection channel 17 is externally connected to a clean water source. The frame 1 continuously supplies clean water to the friction space 36 through the water injection channel 17 and the water injection holes 321. The clean water in the friction space 36 can take out the impurities separated from the rice grains due to the friction action from the overflow hole 331 together. A waste water tank 18 is provided on the frame 1 and below the second friction body 32. The water flowing out of the overflow hole 331 will fall into the waste water tank 18.

[0045] As Figure 1 、 Figure 6 and Figure 7 shown, a plurality of second friction bodies 32 are arranged in an array along the length direction of the friction space 36, and a gap is formed between every two adjacent second friction bodies 32. The friction mechanism 3 further includes a plurality of third friction bodies 34, the third friction bodies 34 being synchronous belts. The plurality of synchronous belts are arranged along the length direction of the friction space 36, and a single synchronous belt is located in the gap between a pair of adjacent second friction bodies 32. The friction mechanism 3 further includes a serrated pulley 341, the serrated pulley 341 being rotatably arranged on the frame 1, and the synchronous belt is wound around the serrated pulley 341. The side of the synchronous belt facing the friction space 36 is flush with the side of the second friction body 32 facing the rice grains. The driving direction of the synchronous belt is also horizontal and perpendicular to the driving direction of the first friction body 31, that is, the frictional force generated by the synchronous belt on the rice grains when contacting them is perpendicular to the overall moving direction of the rice grains. The winding directions of every two adjacent synchronous belts are opposite, aiming to improve the friction effect of the third friction body 34 on the rice grains.

[0046] As Figure 1 and Figure 8 shown, the friction mechanism 3 further includes a control assembly 35 for controlling the rotation of the serrated pulley 341. The control assembly 35 includes a control motor 351, a driving shaft 352 and a commutation auxiliary shaft 353. The driving shaft 352 and the commutation auxiliary shaft 353 are both rotatably connected to the frame 1 and the axes of both are parallel to the length direction of the friction space 36. The plurality of serrated pulleys 341 include a plurality of first pulleys 3411 and a plurality of second pulleys 3412. Each synchronous belt is selectively wound around the first pulley 3411 or the second pulley 3412; the first pulleys 3411 and the second pulleys 3412 are arranged alternately along the axial direction of the driving shaft 352. The first pulleys 3411 are coaxially and fixedly arranged on the driving shaft 352, and the second pulleys 3412 are coaxially and freely rotatably connected to the driving shaft 352. A force-bearing gear 354 is coaxially and fixedly connected to the second pulley 3412, and a plurality of transmission gears 355 are coaxially fixed on the commutation auxiliary shaft 353. The transmission gears 355 are meshed with the force-bearing gear 354. The control motor 351 is fixedly connected to the frame 1, and its output shaft is coaxially and fixedly connected to the driving shaft 352. An output gear 357 is coaxially fixed on the driving shaft 352, and an input gear 356 is coaxially fixed on the commutation auxiliary shaft 353. An engaging gear 358 is rotatably arranged on the frame 1. The output gear 357 and the input gear 356 are both meshed with the engaging gear 358, that is, the rotation directions of the commutation auxiliary shaft 353 and the driving shaft 352 are the same. Since the first pulleys 3411 and the driving shaft 352 rotate synchronously, and the transmission gears 355 and the commutation auxiliary shaft 353 rotate synchronously, the rotation directions of the first pulleys 3411 and the second pulleys 3412 are opposite, so that the winding directions of the synchronous belts corresponding to the first pulleys 3411 and the synchronous belts corresponding to the second pulleys 3412 are opposite.

[0047] As Figure 1 and Figure 9 shown, a receiving sieve plate 15 is provided at one end of the frame 1 in the friction space 36 away from the discharge port 13. The receiving sieve plate 15 is lower than the friction space 36. After the rice grains flow out of the friction space 36, they fall on the receiving sieve plate 15, and the water passes through the receiving sieve plate 15 and falls into the wastewater tank 18. A drain hole 14 is formed in the lower wall of the low position of the wastewater tank 18, and the water in the wastewater tank 18 can flow out through the drain hole 14 for treatment. A vibrating roller 16 is rotatably provided on the frame 1. The cross section of the vibrating roller 16 is a circle with a protrusion on the side. The rotation axis of the vibrating roller 16 is parallel to the axis of the transmission belt pulley 311. One side of the receiving sieve plate 15 close to the friction mechanism 3 is hinged to the frame 1, and the hinge axis is a horizontal axis, and the other side is inclined downward. The vibrating roller 16 abuts against the lower side of the receiving sieve plate 15. A motor (not shown in the figure) for controlling the rotation of the vibrating roller 16 is installed on the frame 1. When the vibrating roller 16 rotates, the receiving sieve plate 15 shakes up and down, prompting the rice grains on it to move forward and fall quickly. The operator can receive the cleaned rice at the end of the receiving sieve plate 15.

[0048] In this embodiment, the working speed of the stirring shaft 21 is 40 r / min, the axial stroke of the stirring shaft 21 is 8 cm, the circumferential speed of the first friction body 31 is 15 cm / s, the width of the third friction body 34 in the length direction of the friction space 36 is 4 cm, the circumferential speed is 8 cm / s, the distance between two adjacent third friction bodies 34 is 35 cm, and the number of the third friction bodies 34 is 10.

[0049] The working process of this embodiment: Rice raw materials are added into the cleaning cylinder 11 through the feeding port 12, and then the clear water source is turned on. The clear water flows through the clear water channel 213 into the cleaning cylinder 11 and mixes with the rice. Subsequently, the stirring mechanism 2 starts to work. The stirring shaft 21 rotates to make the rice grains and water in the cleaning cylinder 11 fully contact. Then the stirring shaft 21 stops rotating, and the water pump is turned on. The water in the cleaning cylinder 11 is pumped out through the return water channel 214; after the above process is repeated many times, the stirring shaft 21 is lifted, the discharge port 13 is opened, and the rice grains and water enter the friction space 36 through the relay pipe 131. The first friction body 31, the second friction body 32 and the third friction body 34 convey and frictionally process the rice grains, and at the same time, clear water is continuously supplemented into the friction space 36 through the water injection channel 17. When the rice grains are removed from the friction space 36, the cleaning process is completed as a whole.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rice production and cleaning device, comprising a frame (1), the frame (1) being provided with a cleaning cylinder (11) and a stirring mechanism (2), the cleaning cylinder (11) being provided with a feeding port (12) and a discharging port (13), the stirring mechanism (2) comprising a stirring shaft (21) and a first driving source (27), the stirring shaft (21) extending into the cleaning cylinder (11) and the two being coaxial, the first driving source (27) being used to control the stirring shaft (21) to rotate relative to the cleaning cylinder (11); It is characterized in that The invention also comprises a friction mechanism (3), the friction mechanism (3) comprising a first friction body (31) and a second friction body (32), the first friction body (31) and the second friction body (32) being relatively movable and both connected to the frame (1), a friction space (36) being formed between the first friction body (31) and the second friction body (32), one end of the friction space (36) being connected to the discharge port (13) of the cleaning cylinder (11), the rice grains being in contact with the first friction body (31) and the second friction body (32) at the same time, the combined force direction of the first friction body (31) and the second friction body (32) acting on the rice grains being in a direction away from the discharge port (13), and a receiving screen plate (15) being provided on the frame (1) and located at one end of the friction space (36) away from the discharge port (13), the receiving screen plate (15) being lower than the friction space (36).

2. A rice production cleaning device according to claim 1, characterized in that: The first friction body (31) is a belt, the second friction body (32) is a rubber pad, the friction mechanism (3) further comprises a transmission pulley (311), the transmission pulley (311) is rotatably connected to the frame (1), the belt is wound around the transmission pulley (311), the rubber pad is fixedly connected to the frame (1), the side of the belt facing the rubber pad is in contact with the rice grains, and the moving direction of the position where the belt contacts the rice grains is in a direction away from the cleaning cylinder (11).

3. A rice production cleaning device according to claim 2, characterized in that: The second friction body (32) is provided with a water injection hole (321), the water injection hole (321) being in communication with the friction space (36); the frame (1) is provided with a water injection channel (17), the water injection channel (17) being in communication with an end of the water injection hole (321) away from the friction space (36); the friction mechanism (3) further comprises a limit plate (33), the limit plate (33) being located at a side edge of the friction space (36); the limit plate (33) being in contact with both the first friction body (31) and the second friction body (32); the limit plate (33) being provided with an overflow hole (331), the overflow hole (331) being in communication with the friction space (36).

4. A rice production cleaning device according to claim 3, characterized in that: The length direction of the friction space (36) is horizontal. The friction mechanism (3) further comprises a third friction body (34). The third friction body (34) is a synchronous belt. The friction mechanism (3) further comprises a sawtooth belt pulley (341). The sawtooth belt pulley (341) is rotatably arranged on the frame (1). The synchronous belt is wound around the sawtooth belt pulley (341). A side of the synchronous belt facing the friction space (36) is flush with a side of the second friction body (32) facing the rice grains. The transmission direction of the synchronous belt is horizontal and perpendicular to the transmission direction of the first friction body (31).

5. A rice production cleaning device according to claim 4, characterized in that: There are a plurality of third friction bodies (34), which are arranged in an array along the length direction of the friction space (36), and the winding directions of two adjacent synchronous belts are opposite. The friction mechanism (3) also includes a control component (35) for controlling the rotation of the sawtooth pulley (341).

6. A rice production cleaning device according to claim 5, characterized in that: The control component (35) comprises a driving shaft (352) and a reversing auxiliary shaft (353); the plurality of sawtooth pulleys (341) comprise a plurality of first pulleys (3411) and a plurality of second pulleys (3412); the driving shaft (352) and the reversing auxiliary shaft (353) are both rotatably connected to the frame (1); the first pulley (3411) is relatively coaxially fixed on the driving shaft (352); the second pulley (3412) is rotatably connected to the driving shaft (352); the axes of the driving shaft (352) and the reversing auxiliary shaft (353) are parallel and have the same direction of rotation; a force-bearing gear (354) is coaxially fixedly connected to the second pulley (3412); a transmission gear (355) is coaxially fixed to the reversing auxiliary shaft (353); the transmission gear (355) and the force-bearing gear (354) are meshed.

7. A rice production cleaning device according to any one of claims 1 to 6, characterized in that: The invention also comprises a second driving source (28), wherein the second driving source (28) is used to control the stirring shaft (21) to move in the axial direction, the discharge port (13) and the cleaning cylinder (11) are coaxial and located at the bottom end of the cleaning cylinder (11), the bottom end of the cleaning cylinder (11) is bucket-shaped, the lower end of the cleaning cylinder (11) is fixedly connected to a relay pipe (131), the discharge port (13) is located at the upper end of the relay pipe (131), and the stirring shaft (21) is selectively inserted into the discharge port (13) to block the discharge port (13).

8. A rice production cleaning device according to claim 7, characterized in that: The axis of the stirring shaft (21) is in a vertical direction. The stirring shaft (21) comprises a main body (211) and an extension (212). The extension (212) is located below the main body (211) and the two are coaxial. An adjusting sleeve (22) is coaxially slidably arranged on the stirring shaft (21) and between the main body (211) and the extension (212). A clearance ring (24) is coaxially fixedly connected to the adjusting sleeve (22). An adjusting spring (23) is connected between the adjusting sleeve (22) and the stirring shaft (21). An elastic pad (25) is fixedly connected to the inner bottom wall of the cleaning cylinder (11). When the extension (212) is inserted into the discharge port (13), the clearance ring (24) and the elastic pad (25) abut against each other, and the adjusting spring (23) applies a downward thrust to the adjusting sleeve (22).

9. A rice production cleaning device according to claim 8, characterized in that: A clean water channel (213) and a return water channel (214) are provided in the stirring shaft (21) along its length direction; a clean water hole (215) and a return water hole (216) are provided on the stirring shaft (21); the clean water hole (215) is connected to the clean water channel (213); the return water hole (216) is connected to the return water channel (214); the clean water channel (213) is connected to an external water source; the return water channel (214) is connected to an external water pump; the clean water hole (215) and the return water hole (216) are arranged in a staggered manner along the axial direction of the stirring shaft (21).

10. A rice production cleaning device according to claim 9, characterized in that: A filter frame (241) is fixedly connected between the adjustment sleeve (22) and the clearance ring (24); the water return hole (216) is located in the extension portion (212); and the clean water hole (215) is located in the main body portion (211).

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