Rice huller with high threshing rate

Abstract

The invention relates to the technical field of rice processing, and discloses a rice huller with high threshing rate, which comprises a rack, two rubber rollers, a hulled material feeding mechanism and a rice hull separation system. Compared with the prior art, the rice hull separation device has the following advantages and effects that the structure of the rice hull feeding mechanism is improved, rice hulls are preliminarily separated before entering the rice hull separation system, the rice hulls with high rice hull content and the rice hulls with high brown rice content are respectively obtained, then the two kinds of rice hulls are respectively fed into different positions of the separation air duct, and the rice hulls are separated from the rice hull separation system. And the primarily separated rice hulls are subjected to primary winnowing, so that the requirements of operation regulations can be met, and secondary winnowing is not needed. The effects that operation requirements can be met through primary winnowing, secondary winnowing is not needed, and equipment cost increase and energy consumption caused by secondary winnowing are reduced are achieved, under the current situation that the total processing amount is huge, huge energy consumption can be saved through application and popularization, the processing cost of rice processing enterprises is reduced, and the rice winnowing machine has great significance in the rice processing industry.

Description

Technical Field

[0001] The invention relates to the technical field of rice processing, in particular to a rice husker with high threshing rate. Background Art

[0002] Rice processing mainly refers to the process of converting rice into white rice, which mainly includes rice cleaning, rice husking, rice-brown separation, rice milling and other processes. Among them, rice husking refers to the process of removing rice husks to obtain brown rice and rice husks. The mechanical equipment used in the rice husking process is the rice husker, which is mainly divided into centrifugal rice husker, sand disc rice husker and rubber roller rice husker. The centrifugal rice husker has a simple structure and occupies a small area, but the impact and friction of the centrifuge will cause great damage to the grains and the broken rice rate is high. It is mainly used for household rice husking, which is ready to eat. When the sand disc rice husker is used for rice husking, the grains are severely damaged and the husking rate is low. It has basically been eliminated. The rubber roller rice husker has high efficiency and low broken rice rate. It is currently the most widely used rice husking equipment.

[0003] During the rice hulling process, a pair of highly elastic rubber rollers are mainly used. The two highly elastic rubber rollers rotate in opposite directions at different speeds. The rice grains contact the rubber rollers to undergo elastic deformation, obtain a certain pressure, complete husking, and obtain the rice husk mixed with brown rice and rice husk. The rice husk separation system is used to separate the brown rice and rice husk in the rice husk, and pneumatic air separation is generally used to achieve the separation of the two. The rice milling process technology operating procedures in the industry require that the rice husk content in the rice-brown mixture is ≤0.8%, and the grain content in the husk is ≤30 grains / 100kg. In the existing technology, there are foreign manufacturers such as Buhler, etc., who produce rice processing equipment that can achieve one-time separation during rice hulling processing to meet the requirements, but the equipment is expensive, and many rice processing companies cannot afford the high equipment costs. At present, the secondary air separation technology is widely used and promoted in the domestic rice processing industry. First, low wind speed is used for the first air separation, and then high-speed wind is used for the second air separation. The secondary air separation technology is used to ensure that the separation of rice husk meets the requirements. However, secondary air separation technology has the following disadvantages: First, secondary air separation technology will increase the floor space and equipment costs, but the value of the recovered grains is not enough to make up for the increased cost of secondary air separation technology, resulting in many rice processing companies actually not willing to carry out secondary air separation. Second, rice is the staple food in my country, and the total output and total processing volume are very huge. Carrying out secondary air separation will cause huge energy consumption and increase the cost of rice processing. Summary of the invention

[0004] The object of the present invention is to provide a rice husker with a high threshing rate, which has the effect of using one-time air separation when separating husker under-husker and having low equipment cost.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a rice huller with a high threshing rate, comprising a frame, two rubber rollers, a rice husk separation system, and a huller feeding mechanism for conveying hulled material after passing through the two rubber rollers to the rice husk separation system, the huller feeding mechanism comprising an inclined feeding channel, a driven shaft located at the lower side of the feeding channel, and a cam fixed on the driven shaft, the driven shaft is rotatably connected to the frame, a transmission mechanism for transmitting power is installed between the driven shaft and one of the rubber rollers, a feed port is provided at the upper end of the feeding channel, and the inner wall of the feeding channel is provided with a feeding port. A feeding trough one and a feeding trough two are formed, and the inner wall of the feeding channel is formed with a guide surface located above the feeding trough one and the feeding trough two, the bottom of the feeding trough one is provided with a movable groove, an impact seat movably embedded in the movable groove, and a connecting rod fixed on the impact seat, the bottom of the movable groove is provided with a through hole that runs through the feeding channel, the connecting rod passes through the through hole and abuts against the cam surface, the guide surface is inclined toward the feeding trough two to guide the rice huller contacting the guide surface to the feeding trough two, a feeding port one is provided at a lower end of the feeding trough, and a feeding port two is provided at a lower end of the feeding trough.

[0006] By adopting the above technical solution, the suspension speed of brown rice and rice husk is quite different during the separation of hulled materials. Theoretically, only the appropriate airflow size needs to be designed to achieve effective separation of the two. However, from the actual point of view of the rice processing industry, whether in theoretical research or practice, the effect achieved by primary air separation is still not ideal, the separation is still not thorough, and secondary air separation is still the mainstream of the rice processing industry.

[0007] After research, it was found that from the current technical point of view, the airflow size of the wind separation equipment and the control of airflow stability are already very mature technologies. It is difficult to achieve the complete separation of rice husk and brown rice by simply controlling the wind separation airflow. After research, it was found that the rice husk is mainly carried to the brown rice outlet after being entrained by the brown rice, resulting in excessive husk content in the brown rice, while the brown rice is mainly floated up and discharged from the rice husk outlet after being impacted by the rice husk, resulting in excessive grain content in the husk.

[0008] The present invention ingeniously arranges a feeding trough 1 and a feeding trough 2 in a feeding channel, and rice husks enter the feeding trough 1 from a feeding port. The rubber roller transmits power through a transmission mechanism during rotation to drive the driven shaft to rotate, and the cam of the driven shaft drives the connecting rod and the impact seat to reciprocate and lift. The impact seat can exert an impact force on the rice husks passing through, and the rice husks are lifted up after being impacted. Compared with brown rice, rice husks are more easily lifted up by impact, and are guided to the feeding trough 2 after contacting a guide surface. In this way, the rice husks in the feeding trough 1 have a larger content of brown rice, and the rice husks in the feeding trough 2 have a larger content of rice husks, thereby achieving preliminary separation. The two kinds of rice husks after preliminary separation are respectively fed into the separation air duct, and the husk content and the grain content of the brown rice in the rice husk can be effectively reduced during the air selection process. Combined with a stable and appropriate airflow and an appropriate feeding speed, the requirements can be met after one air selection, and there is no need for secondary air selection, thereby reducing the increase in equipment cost, the increase in floor space and the energy consumption caused by the secondary air selection. It should be pointed out that the power source in the initial separation is with the help of the normally operating rubber roller. Although it will increase the resistance of the rubber roller rotation to a certain extent, resulting in a certain increase in energy consumption, the increased energy consumption is very small and can be almost ignored.

[0009] The present invention is further configured as follows: the rice husk separation system includes a separation air duct and a fan installed on the separation air duct, the lower end of the separation air duct is provided with a brown rice outlet, the upper end of the separation air duct is provided with a rice husk outlet, the feeding port one and the feeding port two are both connected to the side wall of the separation air duct, and the feeding port two is higher than the feeding port one.

[0010] By adopting the above technical solution, the hulled material fed into the first feeding port has a larger content of brown rice, so it is set in a lower area, and the hulled material fed into the second feeding port has a larger content of rice husk, so it is set in a higher area.

[0011] The present invention is further configured as follows: the second feeding port is located above and to the side of the first feeding port.

[0012] The present invention is further configured as follows: an elastic membrane is provided on the bottom wall of the first feeding trough, an edge of the elastic membrane is fixed to the bottom wall of the first feeding trough, and the middle of the elastic membrane covers the impact seat and the movable groove.

[0013] By adopting the above technical solution, the elastic membrane has at least the following functions: first, it can prevent the rice huller from entering the gap between the impact seat and the movable groove, thereby protecting the rice huller, the movable groove and the impact seat. Second, after the impact seat rises, the elastic force generated by the deformation of the elastic membrane makes the impact seat tend to move downward and reset, and as the cam rotates, the impact seat quickly resets downward.

[0014] The present invention is further configured as follows: the connecting rod includes a first rod segment and a second rod segment, the side wall of the first rod segment is provided with a plurality of first through holes, the second rod segment is provided with a plurality of second through holes, the first rod segment is provided with connecting bolts that pass through the first through holes and the second through holes in sequence, and the connecting bolts are threadedly connected with connecting nuts.

[0015] By adopting the above technical solution and adjusting the relative position of the first rod segment and the second rod segment, the stroke and impact force of the impact seat can be adjusted.

[0016] The present invention is further configured as follows: the cam curved surface is provided with an annular notch, and the end of the connecting rod is embedded in the annular notch.

[0017] By adopting the above technical solution, the annular notch limits the position of the connecting rod end, thereby preventing the connecting rod end from deviating from the cam curved surface.

[0018] The present invention is further configured as follows: the end of the connecting rod close to the annular notch is spherical.

[0019] The present invention is further configured as follows: a linear bearing is provided at the through hole.

[0020] By adopting the above technical solution, the wear of the connecting rod can be reduced.

[0021] The present invention is further configured as follows: the transmission mechanism comprises a first pulley fixed to the rubber roller, a second pulley fixed to the driven shaft, and a transmission belt sleeved on the first pulley and the second pulley.

[0022] The present invention is further configured as follows: the frame is provided with a driving device for driving the rubber roller to rotate.

[0023] The beneficial effects of the present invention are as follows: the present invention improves the structure of the feeding mechanism of the rice husk, performs preliminary separation before the rice husk enters the rice husk separation system, obtains rice husk with high rice husk content and rice husk with high brown rice content, respectively, and then feeds the two kinds of rice husk into different positions of the separation air duct respectively, and the rice husk after the preliminary separation can meet the requirements of the operating procedures after one air selection, without the need for secondary air selection, thereby reducing the equipment cost, floor space and energy consumption of the secondary air selection, and the power source in the preliminary separation is the rubber roller in normal operation, which increases the energy consumption very little. The present invention achieves the effect of meeting the operating requirements with one air selection, without the need for secondary air selection, and saving the increase in equipment cost and energy consumption caused by secondary air selection. Under the current situation of huge total processing volume, the promotion and application can save huge energy consumption and reduce the processing cost of rice processing enterprises, which is of great significance to the rice processing industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0025] Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 .

[0026] Figure 2 The structure of the present invention is schematically shown in FIG. Figure 2 .

[0027] Figure 3 It is a schematic diagram of the positional relationship between the rubber roller and the huller feeding mechanism of the present invention.

[0028] Figure 4 It is a schematic diagram of the feeding channel structure of the present invention.

[0029] Figure 5 It is a structural schematic diagram of a feeding trough of the present invention.

[0030] Figure 6 It is a structural schematic diagram of the feeding trough 2 of the present invention.

[0031] Figure 7 It is a schematic diagram of the structural relationship between the feeding trough 1, the feeding trough 2 and the guide surface of the present invention.

[0032] Figure 8 It is a schematic diagram of the explosion state between the feeding trough 1 and the impact seat of the present invention.

[0033] Fig. 9 It is a schematic diagram of the positional relationship among the connecting rod, cam and driven shaft of the present invention.

[0034] Fig.10 It is a schematic diagram of the connecting rod structure of the present invention.

[0035] In the figure, 1, frame; 11, observation window; 2, rubber roller; 3, rice husk feeding mechanism; 31, feeding channel; 32, feeding trough 1; 321, feeding port; 322, feeding port 1; 323, elastic membrane; 33, feeding trough 2; 331, feeding port 2; 34, driven shaft; 35, cam; 351, annular notch; 36, guide surface; 37, movable groove; 371, perforation; 38, impact seat; 39, connecting rod; 391, first rod section; 392, second rod section; 393, first through hole; 394, second through hole; 4, rice husk separation system; 41, separation air duct; 42, fan; 43, brown rice outlet; 5, transmission mechanism; 51, pulley 1; 52, pulley 2; 53, transmission belt; 6, connecting bolt; 61, connecting nut. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] A rice husker with a high threshing rate, such as Figure 1 , Figure 2 As shown, it includes a frame 1, two rubber rollers 2, a driving device for driving the rubber rollers 2 to rotate, a rice husk feeding mechanism 3, and a rice husk separation system 4. The frame 1 includes a chamber. The two rubber rollers 2 are rotatably connected to the frame 1 and are located in the chamber. A transparent observation window 11 is provided on the chamber to facilitate the staff to observe the status of the rubber rollers 2. The driving device is used to drive the two rubber rollers 2 to rotate in opposite directions, and the rotation speeds of the two rubber rollers 2 are different. The rice is fed from above the two rubber rollers 2, and the rice is husked after being squeezed by the two rubber rollers 2 to obtain the rice husk. The rice husk feeding mechanism 3 is used to feed the rice husk into the rice husk separation system 4, and the rice husk separation system 4 is used to separate the rice husk from the brown rice.

[0038] like Figures 3 to 8 As shown, the rice huller feeding mechanism 3 includes an inclined feeding channel 31, a driven shaft 34 located at the lower side of the feeding channel 31, and a cam 35 fixed on the driven shaft 34. The feeding channel 31 has a rectangular cross section, and one surface inside it is formed with a feeding trough 1 32 and a feeding trough 2 33. The feeding trough 1 and the feeding trough 2 are arranged in parallel, and a feed port 321 is formed at the upper end of the feeding trough 1, and a feeding port 1 322 is provided at the lower end of the feeding trough, and a feeding port 2 331 is provided at the lower end of the feeding trough. The feeding port 2 331 is located above and to the side of the feeding port 1 322. A guide surface 36 is formed on one side of the inner wall of the feeding channel 31 relative to the feeding trough 1, and the guide surface 36 is inclined downward on one side and faces the feeding trough 2.

[0039] like Figure 8 to Figure 9 As shown, a movable groove 37 is provided at the bottom of the feeding trough 1, and an impact seat 38 is movably embedded in the movable groove 37. An elastic membrane 323 is provided at the bottom wall of the feeding trough 1 32. The edge of the elastic membrane 323 is fixed to the bottom wall of the feeding trough 1 32, and the middle of the elastic membrane 323 covers the impact seat 38 and the movable groove 37. A connecting rod 39 is fixed to the impact seat 38. A through hole 371 penetrating the feeding channel 31 is provided at the bottom of the movable groove 37. After the connecting rod 39 passes through the through hole 371, it abuts against the curved surface of the cam 35. The curved surface of the cam 35 is formed with a circle of annular notches 351. One end of the connecting rod 39 is located in the annular notch 351 and is spherical. A linear bearing is installed at the through hole 371 to reduce the wear of the connecting rod 39.

[0040] like Fig.10 As shown, the connecting rod 39 includes a first rod segment 391 and a second rod segment 392. The side wall of the first rod segment 391 is provided with a plurality of first through holes 393, and the second rod segment 392 is provided with a plurality of second through holes 394. The first rod segment 391 is provided with a connecting bolt 6 which passes through the first through hole 393 and the second through hole 394 in sequence, and the connecting bolt 6 is threadedly connected with a connecting nut 61.

[0041] like Figure 2 , Fig. 9 As shown, a transmission mechanism 5 is installed between the driven rod and one of the rubber rollers 2, and the transmission mechanism 5 is used to transmit power. The transmission mechanism 5 includes a pulley 1 51 fixed to the rubber roller 2, a pulley 2 52 fixed to the driven shaft 34, and a transmission belt 53 sleeved on the pulley 1 51 and the pulley 2 52.

[0042] like Figure 1 As shown, the rice husk separation system 4 includes a separation air duct 41, a fan 42 installed on the separation air duct 41, a brown rice outlet 43 is provided at the lower end of the separation air duct 41, and a rice husk outlet is provided at the upper end of the separation air duct 41. The first feeding port 322 and the second feeding port 331 are both connected to the side wall of the separation air duct 41, and are used to feed rice husk into the separation air duct 41.

[0043] Working principle: The rice passes through two rubber rollers 2 and is husked to obtain the husked material. The husked material enters the feeding trough 32 from the feed port 321. The rubber roller 2 transmits power through the transmission mechanism 5 during the rotation process, driving the driven shaft 34 to rotate. The cam 35 of the driven shaft 34 drives the connecting rod 39 and the impact seat 38 to reciprocate and rise and fall. The impact seat 38 can exert an impact force on the husked material passing through. The husked material is lifted up after being hit. Compared with brown rice, rice husks are more easily lifted up by impact. , after contacting the guide surface 36, it is guided to the second feeding trough 33. In this way, the husk content in the husk in the feeding trough 1 32 is relatively large, and the husk content in the husk in the feeding trough 2 33 is relatively large, so preliminary separation is achieved. The two types of husk after preliminary separation are respectively fed into the separation air duct 41. During the air selection process, the husk content in the brown rice and the grain content in the rice husk can be effectively reduced. Combined with a stable, appropriate airflow and a suitable feeding speed, the requirements can be met after one air selection.

Claims

1. A rice husker with a high threshing rate, comprising a frame (1), two rubber rollers (2), a rice husk separation system (4), and a rice husk feeding mechanism (3) for conveying husker after passing through the two rubber rollers (2) to the rice husk separation system (4), characterized in that: The rice huller feeding mechanism (3) comprises an inclined feeding channel (31), a driven shaft (34) located at the lower side of the feeding channel (31), and a cam (35) fixed on the driven shaft (34); the driven shaft (34) is rotatably connected to the frame (1); a transmission mechanism (5) for transmitting power is installed between the driven shaft (34) and one of the rubber rollers (2); a feed port (321) is provided at the upper end of the feeding channel (31); a feeding trough 1 (32) and a feeding trough 2 (33) are formed on the inner wall of the feeding channel (31); a guide surface (36) is formed on the inner wall of the feeding channel (31) and is located above the feeding trough 1 (32) and the feeding trough 2 (33); The bottom of the feeding trough (32) is provided with a movable groove (37), an impact seat (38) movably embedded in the movable groove (37), and a connecting rod (39) fixed to the impact seat (38); the bottom of the movable groove (37) is provided with a through hole (371) penetrating the feeding channel (31); the connecting rod (39) passes through the through hole (371) and abuts against the curved surface of the cam (35); the guide surface (36) is inclined toward the feeding trough (33) so as to guide the rice hullers contacting the guide surface (36) to the feeding trough (33); the lower end of the feeding trough (32) is provided with a feeding port (322); the lower end of the feeding trough (33) is provided with a feeding port (331).

2. A rice husker with a high threshing rate according to claim 1, characterized in that: The rice husk separation system (4) comprises a separation air duct (41) and a fan (42) installed on the separation air duct (41); a brown rice outlet (43) is provided at the lower end of the separation air duct (41); a rice husk outlet is provided at the upper end of the separation air duct (41); the first feeding port (322) and the second feeding port (331) are both connected to the side wall of the separation air duct (41); and the second feeding port (331) is higher than the first feeding port (322).

3. A rice husker with a high threshing rate according to claim 1 or 2, characterized in that: The second feeding port (331) is located above and to the side of the first feeding port (322).

4. A rice husker with high threshing rate according to claim 1, characterized in that: The bottom wall of the feeding trough (32) is provided with an elastic membrane (323), the edge of the elastic membrane (323) is fixed to the bottom wall of the feeding trough (32), and the middle part of the elastic membrane (323) covers the impact seat (38) and the movable groove (37).

5. The rice husker with high threshing rate according to claim 1, characterized in that: The connecting rod (39) comprises a first rod section (391) and a second rod section (392); a plurality of first through holes (393) are formed on a side wall of the first rod section (391); a plurality of second through holes (394) are formed on a side wall of the second rod section (392); the first rod section (391) is provided with a connecting bolt (6) which passes through the first through hole (393) and the second through hole (394) in sequence; the connecting bolt (6) is threadedly connected with a connecting nut (61).

6. A rice husker with high threshing rate according to claim 1, characterized in that: The curved surface of the cam (35) is provided with an annular notch (351), and the end of the connecting rod (39) is embedded in the annular notch (351).

7. A rice husker with high threshing rate according to claim 6, characterized in that: The end of the connecting rod (39) close to the annular notch (351) is spherical.

8. The rice husker with high threshing rate according to claim 1, characterized in that: A linear bearing is provided at the through hole (371).

9. The rice husker with high threshing rate according to claim 1, characterized in that: The transmission mechanism (5) comprises a first pulley (51) fixed to the rubber roller (2), a second pulley (52) fixed to the driven shaft (34), and a transmission belt (53) sleeved on the first pulley (51) and the second pulley (52).

10. A rice husker with high threshing rate according to claim 1, characterized in that: The frame (1) is provided with a driving device for driving the rubber roller (2) to rotate.

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