A fully automatic rice hulling and milling combined set

Abstract

The utility model relates to rice processing technical field discloses a kind of full-automatic hulling and milling combined set rice milling equipment, through the design of hulling mechanism, the interval between two rubber rollers is adjusted using self-locking assembly, motor one drives slider to move, drive distance sensor to move along, that is, reflect the interval between two rubber rollers, the wear of rubber roller can be dynamically compensated, make rubber roller keep constant shelling pressure, avoid the error of transmission manual adjustment, improve shelling rate, reduce broken rice rate;Through the design of rice milling mechanism, the rough rice is crushed by the pulverizer, the rice grains and rice bran are separated by using gravity settling, the rice bran is sucked by negative pressure, dust is reduced, and motor two can switch rotation direction based on hammer wear degree, when one side of hammer is seriously worn, motor two reverses, make the other side of hammer work, prolong the service life of hammer, and maintain crushing efficiency, and fan is equipped with flap matched with motor two positive and negative rotation, can follow the rotation direction of motor two synchronous flip.

Description

Technical Field

[0001] This utility model relates to the field of rice processing technology, specifically to a fully automatic rice milling equipment consisting of a huller and a milling unit. Background Technology

[0002] Rice processing refers to the process of handling harvested paddy rice through a series of techniques to obtain edible rice. Its core objective is to remove the outer husk, bran (rice bran), and germ of the paddy rice while retaining the internal endosperm (polished rice), and at the same time maximize the milling yield and head rice rate to ensure the hygiene, safety, and quality of the rice.

[0003] Removing the husks requires a rice huller, and removing the bran requires a rice milling machine.

[0004] A search revealed that patent application number CN202321870797.1 discloses a rice hulling and milling machine, including a casing. A feeding hopper is located at the top of the casing. A first vibrating screen is located below the feeding hopper inside the casing, and a rice huller is located below the first vibrating screen. A second vibrating screen is located below the rice huller, and a blower is positioned between the second vibrating screen and the rice huller. A first chamber is located on the side of the casing opposite the blower. The rice milling machine is located at the outlet of the second vibrating screen, and a rice outlet is located at the bottom of the casing corresponding to the bottom of the rice milling machine. The milled rice exits the casing through the rice outlet. The first vibrating screen screens the grain fed into the feeding hopper, removing straw and stones to prevent large stones from damaging the rubber rollers of the rice huller. The blower and the second vibrating screen remove small sand and gravel to prevent damage to the rice milling machine. During rice processing, it is unnecessary to pre-screen the grain for straw and sand, reducing workload and improving efficiency.

[0005] Traditional rice hullers require manual adjustment of the gap after the rubber rollers wear out, which reduces hulling efficiency. Furthermore, the error of manual adjustment is relatively large, exceeding 0.5mm, resulting in a decrease in the hulling rate and an increase in the broken rice rate. During rice milling, the efficiency of brown rice grinding decreases after the hammer blades wear on one side, and the hammer blades must be replaced. Therefore, we need to propose a fully automatic rice hulling and milling equipment. Utility Model Content

[0006] The purpose of this utility model is to provide a fully automatic rice milling equipment consisting of a hulling and milling assembly. Through the design of the hulling mechanism, a self-locking component is used to adjust the distance between the two rubber rollers. A motor drives a slider to move, which in turn moves a distance sensor, reflecting the distance between the two rubber rollers. This dynamically compensates for the wear of the rubber rollers, keeps the rubber rollers at a constant hulling pressure, avoids errors caused by manual adjustment of the transmission, improves the hulling rate, and reduces the broken rice rate, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a fully automatic rice milling equipment consisting of a feeding mechanism, a coarse cleaning and destone removal mechanism for washing and removing impurities from rice, a rice hulling mechanism for removing the husks from the rice, a gravity screening mechanism for separating the husks from the brown rice, and a rice milling mechanism for removing the bran from the surface of the brown rice. The rice milling mechanism is provided in two sets, and a brown rice hopper is provided between the two sets of rice milling mechanisms. The rice hulling mechanism is located at one end of the brown rice hopper, and an electrical control box for controlling the operation of this device is installed on the brown rice hopper.

[0008] The rice milling mechanism includes a second motor that switches between forward and reverse rotation according to the wear condition of the hammer blades, and a fan that uses wind power to remove rice bran. The fan is equipped with a flap that controls the direction of bran discharge in coordination with the forward and reverse rotation of the second motor.

[0009] Preferably, the rice milling mechanism further includes a fixed frame, on which the second motor and the fan are both fixed. The second motor is equipped with an adjustment switch that switches the forward and reverse rotation of the second motor according to the wear of the hammer blades.

[0010] Preferably, one end of the output shaft of the second motor is connected to a pulverizer, a feed inlet for brown rice is installed on one side of the pulverizer, and a chaff hopper is connected between the discharge end of the pulverizer and the air inlet of the blower.

[0011] Preferably, the rice hulling mechanism includes a housing aligned with the brown rice hopper, a hopper mounted on the housing, and two rubber rollers for peeling the rice husks rotatably mounted inside the housing.

[0012] Preferably, a fixed plate is installed on one side of the housing, and a fulcrum shaft and a fixed shaft are respectively installed on the fixed plate. A movable shaft is also rotatably installed on one side of the housing. The fixed shaft and the movable shaft are respectively connected to two rubber rollers inside the housing.

[0013] Preferably, the rice hulling mechanism further includes a self-locking component, which includes a motor, one end of the output shaft of the motor is connected to a lead screw, a bracket is sleeved on the outer wall of the movable shaft, one end of the lead screw is rotatably mounted on the bracket, a slider is threadedly connected to the outer wall of the lead screw, and a distance sensor is installed on one side of the slider.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model, through the design of the rice hulling mechanism, uses a self-locking component to adjust the distance between the two rubber rollers. The motor drives the slider to move, which in turn drives the distance sensor to move, thus reflecting the distance between the two rubber rollers. This can dynamically compensate for the wear of the rubber rollers, keep the rubber rollers at a constant hulling pressure, avoid the error of manual adjustment of the transmission, improve the hulling rate and reduce the broken rice rate.

[0016] 2. This utility model, through the design of the rice milling mechanism, pulverizes brown rice, uses gravity sedimentation to separate rice grains from rice bran, and uses negative pressure to absorb rice bran, reducing dust. In addition, the second motor can switch the rotation direction based on the wear degree of the hammer blades. When one side of the hammer blades is severely worn, the second motor reverses, causing the other side of the hammer blades to work, which extends the service life of the hammer blades and maintains the pulverizing efficiency. Furthermore, the blower is equipped with a flap that works in conjunction with the forward and reverse rotation of the second motor, and can rotate synchronously with the rotation direction of the second motor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the hulling mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the rice milling mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the fan of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the brown rice container of this utility model.

[0022] In the diagram: 1. Feeding mechanism; 2. Coarse cleaning and destoning mechanism; 3. Rice hulling mechanism; 31. Machine casing; 32. Hopper; 33. Fixed plate; 34. Pivot shaft; 35. Fixed shaft; 36. Movable shaft; 37. Motor 1; 38. Lead screw; 39. Sliding block; 310. Distance sensor; 4. Gravity screening mechanism; 5. Rice milling mechanism; 51. Fixed frame; 52. Motor 2; 53. Crusher; 54. Feed inlet; 55. Bran hopper; 56. Adjusting switch; 57. Fan; 58. Flip plate; 6. Brown rice hopper; 7. Electrical control box. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5This utility model provides a technical solution: a fully automatic rice milling equipment consisting of a feeding mechanism 1, a coarse cleaning and destone removal mechanism 2 for washing and removing impurities from rice, a rice hulling mechanism 3 for removing the husks from the rice, a gravity screening mechanism 4 for separating the husks from the brown rice, and a rice milling mechanism 5 for removing the bran from the surface of the brown rice. The rice milling mechanism 5 is provided in two sets, and a brown rice hopper 6 is provided between the two sets of rice milling mechanisms 5. The rice hulling mechanism 3 is located at one end of the brown rice hopper 6, and an electrical control box 7 for controlling the operation of this device is installed on the brown rice hopper 6.

[0025] The coarse cleaning and destoning mechanism 2 adopts a composite purification system consisting of a three-layer filter screen, a permanent magnet iron separator, and a gravity destoner. The screening layer is used to remove straw and millet particles, the magnetic separation layer is used to adsorb iron filings, and the destoning layer uses vibration and negative pressure to separate sand and gravel.

[0026] The coarse cleaning and destone removal mechanism 2 removes sand, stones, and metal impurities from the rice to ensure the safety of subsequent equipment. There are two sets of rice milling mechanisms 5: the upper rice milling mechanism 5 coarsely mills the brown rice, and after being buffered by the brown rice hopper 6, it enters the lower rice milling mechanism 5 for fine milling.

[0027] The rice milling mechanism 5 includes a second motor 52 that switches between forward and reverse rotation according to the wear condition of the hammer blades, and a fan 57 that uses wind power to remove rice bran. The fan 57 is internally equipped with a flap 58 that works in conjunction with the second motor 52 to control the direction of bran discharge.

[0028] The rice milling mechanism 5 also includes a fixed frame 51, on which the second motor 52 and the fan 57 are both fixed. The second motor 52 is equipped with an adjustment switch 56 that switches the forward and reverse rotation of the second motor 52 according to the wear of the hammer blades.

[0029] One end of the output shaft of the second motor 52 is connected to a crusher 53. A feed inlet 54 for brown rice is installed on one side of the crusher 53. A chaff hopper 55 is connected between the discharge end of the crusher 53 and the air inlet of the blower 57. A rice outlet is provided on the chaff hopper 55 located below the crusher 53.

[0030] Motor 2 52 is equipped with an adjustment switch 56, which can switch the rotation direction based on the wear of the hammer blades. When one side of the hammer blades is severely worn, the motor 2 52 is driven to reverse, so that the other side of the hammer blades works to remove the bran from the brown rice, thus extending the service life of the hammer blades and maintaining the crushing efficiency.

[0031] The flap 58 inside the blower 57 rotates synchronously with the rotation direction of the second motor 52, ensuring that when the motor rotates forward, the rice bran is discharged directionally from one side of the blower 57 to the bran collection device (not shown in the figure). When the second motor 52 rotates in reverse, the flap 58 rotates and the rice bran is discharged from the other side of the blower 57.

[0032] By setting up the feed inlet 54, crusher 53, hull 55, and fan 57, negative pressure is used to absorb rice bran, reducing dust, and gravity sedimentation separates rice grains from rice bran.

[0033] The rice hulling mechanism 3 includes a housing 31 aligned with the brown rice hopper 6, a hopper 32 mounted on the housing 31, and two rubber rollers for peeling rice husks rotatably mounted inside the housing 31.

[0034] During the hulling process, two rubber rollers rotate in opposite directions, and there is a linear velocity difference between the two rollers (2.5-3m / s). The rice is hulled by squeezing and tearing.

[0035] A fixing plate 33 is installed on one side of the housing 31. A fulcrum shaft 34 and a fixed shaft 35 are respectively installed on the fixing plate 33. A movable shaft 36 is also rotatably installed on one side of the housing 31. The fixed shaft 35 and the movable shaft 36 are respectively connected to two rubber rollers inside the housing 31.

[0036] The rice hulling mechanism 3 also includes a self-locking assembly for adjusting the distance between the two rubber rollers. The self-locking assembly includes a motor 37, one end of the output shaft of the motor 37 is connected to a lead screw 38, and a bracket is sleeved on the outer wall of the movable shaft 36, which can push the two rubber rollers closer or further apart. One end of the lead screw 38 is rotatably mounted on the bracket, and a slider 39 is threadedly connected to the outer wall of the lead screw 38. A distance sensor 310 is installed on one side of the slider 39.

[0037] Motor 37 drives lead screw 38 to rotate, which in turn drives slider 39 to move linearly. Distance sensor 310 follows slider 39, indirectly reflecting the gap between the two rubber rollers. This dynamically compensates for the wear of the rubber rollers, maintains a constant hulling pressure, avoids the errors of traditional manual adjustment, and achieves automatic gap calibration through electrical control box 7, thereby improving the hulling rate and reducing the broken rice rate.

[0038] In use, unprocessed rice is poured into the feeding mechanism 1 and conveyed to the coarse cleaning and destoning mechanism 2 for impurity removal. Then, the rice is lifted and conveyed to the hulling mechanism 3. The rice husks are removed by utilizing the linear velocity difference between the two rotating rubber rollers. The distance sensor 310 monitors the gap between the two rubber rollers in real time. When the rubber rollers are worn and the gap is greater than 1.2mm, the motor 37 drives the lead screw 38 to rotate, pushing the slider 39 to move, causing the movable shaft 36 to move closer to the fixed shaft 35, reducing the distance between the two rubber rollers to the standard gap.

[0039] After hulling, the brown rice is conveyed to the gravity screening mechanism 4 to separate the brown rice from the rice husk. Then, the brown rice is fed into the rice milling mechanism 5. The brown rice enters the crusher 53 from the feed inlet 54. The high-speed rotating hammer blades remove the rice bran by friction, forming polished rice. The rice bran and polished rice enter the bran settling hopper 55. Under the action of the wind force of the blower 57, the light rice bran is sucked into the blower 57 and discharged, while the polished rice is discharged from the rice outlet.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully automatic rice milling and hulling assembly, characterized in that: It includes a feeding mechanism (1), a coarse cleaning and destone removal mechanism (2) for washing and removing impurities from rice, a rice hulling mechanism (3) for removing the husks from rice, a gravity screening mechanism (4) for separating the husks from the brown rice, and a rice milling mechanism (5) for removing the bran from the surface of the brown rice. The rice milling mechanism (5) is provided in two sets, and a brown rice hopper (6) is provided between the two sets of rice milling mechanisms (5). The rice hulling mechanism (3) is located at one end of the brown rice hopper (6), and an electrical control box (7) for controlling the operation of this device is installed on the brown rice hopper (6). The rice milling mechanism (5) includes a second motor (52) that switches between forward and reverse rotation according to the wear condition of the hammer blades, and a fan (57) that uses wind power to remove rice bran. The fan (57) is equipped with a flap (58) inside that controls the direction of bran discharge in coordination with the forward and reverse rotation of the second motor (52).

2. The fully automatic rice milling equipment according to claim 1, characterized in that: The rice milling mechanism (5) also includes a fixed frame (51), and the second motor (52) and the fan (57) are both fixed on the fixed frame (51). The second motor (52) is equipped with an adjustment switch (56) that switches the second motor (52) in forward and reverse directions according to the wear of the hammer blades.

3. The fully automatic rice milling equipment according to claim 2, characterized in that: One end of the output shaft of the second motor (52) is connected to a pulverizer (53). A feed inlet (54) for brown rice to enter is installed on one side of the pulverizer (53). A chaff hopper (55) is connected between the discharge end of the pulverizer (53) and the air inlet of the blower (57).

4. The fully automatic rice milling equipment according to claim 1, characterized in that: The rice hulling mechanism (3) includes a housing (31) aligned with the brown rice hopper (6), a hopper (32) mounted on the housing (31), and two rubber rollers for peeling rice husks rotatably mounted inside the housing (31).

5. The fully automatic rice milling equipment according to claim 4, characterized in that: A fixing plate (33) is installed on one side of the housing (31). A fulcrum shaft (34) and a fixed shaft (35) are respectively installed on the fixing plate (33). A movable shaft (36) is also rotatably installed on one side of the housing (31). The fixed shaft (35) and the movable shaft (36) are respectively connected to two rubber rollers inside the housing (31).

6. The fully automatic rice milling equipment according to claim 5, characterized in that: The rice hulling mechanism (3) also includes a self-locking component, which includes a motor (37), one end of the output shaft of the motor (37) is connected to a lead screw (38), a bracket is sleeved on the outer wall of the movable shaft (36), one end of the lead screw (38) is rotatably mounted on the bracket, a slider (39) is threadedly connected to the outer wall of the lead screw (38), and a distance sensor (310) is installed on one side of the slider (39).

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