A specific gravity destoner for rice processing

Abstract

This utility model discloses a gravity destoner for rice processing, specifically relating to the field of rice processing technology. It includes four legs, with a common outer shell mechanism on the upper part of each leg. The outer shell mechanism has a feeding mechanism and a dust suction pipe on its upper part. A motor and a transmission mechanism are located on the left side of the feeding mechanism. A screening mechanism is located in the middle of the outer shell mechanism, and a fan is located at the bottom. This gravity destoner for rice processing utilizes a turning plate to thoroughly agitate the rice in the feeding hopper, directly breaking up clumps and preventing clogging of subsequent sieve holes. Simultaneously, the turning process initially disperses and evenly distributes the rice. Combined with a "higher front, lower back" buffer plate, this further reduces the impact force of the falling material, preventing grain breakage while ensuring the material enters the screening mechanism in a uniform, thin layer, laying the foundation for subsequent precise sorting.

Description

Technical Field

[0001] This utility model relates to the field of rice processing technology, and in particular to a specific gravity destoner for rice processing. Background Technology

[0002] In the rice processing process, from rice harvesting and drying to storage, impurities such as stones, soil lumps, and metal fragments are easily mixed in. Among them, stones are the most difficult type of impurity to separate because their density is close to that of rice and their particle shape is similar. If these stones are not completely removed, they will not only damage equipment parts (such as milling rollers and screens) in subsequent rice milling and polishing processes, reducing the service life of the equipment and processing efficiency, but may also remain in the finished rice, affecting consumer safety and even causing safety hazards such as tooth damage. Therefore, gravity removal is a crucial pretreatment process before rice refining.

[0003] Chinese Patent Publication No. CN212310088U discloses a specific gravity destoning machine for rice processing, including a machine box. The top of the machine box is connected to a suction device. A feeding box is provided above the machine box. The inner wall of the feeding box is symmetrically provided with inclined partitions, which divide the feeding box into a feeding chamber and a movable chamber. A receiving tray with a receiving groove is provided in the lower movable chamber. A drive motor is installed on the outside of the feeding box. The drive motor is rotatably connected to the receiving tray through a transmission wheel. Inclined lower screen plates are connected to both sides of the bottom surface of the machine box through springs. A vibration motor is installed in the middle of the lower end of the machine box. An inclined upper screen plate is connected to the upper end of the lower screen plate through a connecting rod. The feeding box of this utility model is provided with a receiving tray that can control the flow rate of rice, which effectively avoids the accumulation of rice on the screen plate and improves the destoning effect. The two-layer screen plate provides a high destoning rate and ensures the quality of the finished rice.

[0004] The aforementioned patent documents still have the following defects in practice:

[0005] The feed box only controls the amount of rice falling by rotating the receiving tray, and there is no pretreatment structure for damp or clumped rice. When processing rice stored in a damp environment, the rice is prone to sticking together and forming clumps due to moisture. These clumps fall directly onto the screen plate, causing local accumulation, disrupting the fluidization state, and affecting the specific gravity separation effect. Utility Model Content

[0006] The main purpose of this utility model is to provide a specific gravity destoner for rice processing, which can effectively solve the problems mentioned above.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A specific gravity destoner for rice processing includes four legs, with a common outer shell mechanism on the upper part of the four legs. The upper part of the outer shell mechanism is equipped with a feeding mechanism and a dust suction pipe. The left side of the feeding mechanism is equipped with a motor and a transmission mechanism. The middle part of the outer shell mechanism is equipped with a screening mechanism, and the lower part of the outer shell mechanism is equipped with a fan.

[0009] Preferably, the outer shell mechanism includes an outer shell, which is disposed on the upper part of four support legs, a support plate is provided at the front of the outer shell, a discharge hopper is provided at the front of the outer shell, and a stone discharge hopper is provided at the right side of the outer shell.

[0010] Preferably, the inner cavities of the outer shell, the stone hopper, and the material discharge hopper are connected.

[0011] Preferably, the feeding mechanism includes a feeding hopper, which is disposed on the upper part of the outer shell, and a support rod is provided at the lower part of the feeding hopper. A plurality of flipping plates are arranged in a ring on the outer surface of the support rod.

[0012] Preferably, the feeding mechanism includes a buffer plate, which is disposed on the upper part of the outer casing, with the front of the buffer plate being higher than the back, and the buffer plate is located below the support rod.

[0013] Preferably, the transmission mechanism includes a first pulley, a transmission belt on the outer surface of the first pulley, a second pulley on the inner surface of the transmission belt away from the first pulley, a fixed rod in the middle of the second pulley, and two cams on the outer surface of the fixed rod.

[0014] Preferably, the screening mechanism includes four fixed plates, which are jointly disposed in the lower part of the inner cavity of the outer shell. Each of the four fixed plates is provided with a spring at its upper part, and a second sieve plate is jointly disposed above the four springs. The lower part of the second sieve plate is provided with two fixed blocks, and the second sieve plate is provided with several air holes. The upper part of the second sieve plate is provided with several protrusions, and the middle part of the second sieve plate is provided with two connecting rods. The upper part of the two connecting rods is jointly disposed with a first sieve plate, and the first sieve plate is provided with several first sieve holes.

[0015] Preferably, some of the bumps are distributed in a fish-scale pattern.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In this embodiment, the support rod and the ring array of flipping plates in the feeding mechanism form the core pre-processing structure. Driven by the motor, the flipping plates can fully agitate the rice in the feeding hopper, directly breaking up clumps and preventing clumped material from clogging the subsequent screen holes. At the same time, the flipping process can initially disperse and evenly distribute the rice. Combined with the "high in the front and low in the back" buffer plate, it further weakens the impact force of the falling material, preventing grain breakage while ensuring that the material enters the screening mechanism in a uniform thin layer, laying the foundation for subsequent accurate sorting, greatly reducing the sorting load of the screen plate, and improving the overall processing smoothness.

[0018] 2. In this embodiment, the sieve holes on sieve plate one can first separate small grain particles from pebbles, directly dividing the material into two groups: "small clean grain particles" and "large grain particles + pebbles." This avoids a large amount of small grain particles and pebbles mixing and occupying the sorting space of sieve plate two, reducing subsequent sorting pressure and improving overall screening efficiency. The fish-scale-shaped protrusions on sieve plate two work synergistically with the air holes. On one hand, the fan blows air upwards through the air holes, utilizing the specific gravity difference between rice and pebbles to keep the rice in a suspended fluidized state while the pebbles remain attached to the plate. On the other hand, during vibration, the fish-scale-shaped protrusions generate directional thrust on the pebbles, guiding them towards the stone discharge hopper, while the fluidized rice is conveyed towards the discharge hopper with the vibration, achieving precise separation between the two. Compared to the traditional single sieve plate structure, this design effectively avoids the problem of incomplete separation caused by the similar shape of pebbles and rice, significantly reducing the residual rate of pebbles in the finished rice and ensuring consumer safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0021] Figure 3 This is a schematic diagram of the outer shell mechanism of this utility model;

[0022] Figure 4 This is a cross-sectional view of the overall structure of this utility model;

[0023] Figure 5 This is a schematic diagram of part of the mechanism structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the screening mechanism of this utility model.

[0025] In the diagram: 1. Support leg; 2. Outer shell mechanism; 21. Outer shell one; 22. Stone discharge hopper; 23. Discharge hopper; 24. Support plate; 3. Feeding mechanism; 31. Feed hopper; 32. Support rod; 33. Tilting plate; 34. Buffer plate; 4. Dust suction pipe; 5. Fan; 6. Motor; 7. Transmission mechanism; 71. Belt pulley one; 72. Transmission belt; 73. Belt pulley two; 74. Fixed rod; 75. Cam; 8. Screening mechanism; 81. Screen plate one; 82. Screen hole one; 83. Connecting rod; 84. Screen plate two; 85. Air hole; 86. Protrusion; 87. Fixed block; 88. Spring; 89. Fixed plate. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] Example 1, as Figure 1 , Figure 2 and Figure 3 As shown, a specific gravity destoner for rice processing includes four support legs 1. The upper part of the four support legs 1 is provided with a housing mechanism 2. The upper part of the housing mechanism 2 is provided with a feeding mechanism 3. The upper part of the housing mechanism 2 is provided with a dust suction pipe 4. The left side of the feeding mechanism 3 is provided with a motor 6. The left side of the feeding mechanism 3 is provided with a transmission mechanism 7. The middle part of the housing mechanism 2 is provided with a screening mechanism 8. The lower part of the housing mechanism 2 is provided with a fan 5.

[0028] In this embodiment, during implementation, the motor 6 and the fan 5 are started. The motor 6 drives the feeding mechanism 3 and the transmission mechanism 7 to operate, so that the grain in the feeding mechanism 3 is evenly fed onto the screening mechanism 8. The transmission mechanism 7 drives the screening mechanism 8 to operate. The screening mechanism 8, together with the fan 5, separates the grain and impurities. The other end of the suction pipe 4 is connected to the workshop dust removal system, forming a negative pressure inside the outer shell 21. When the fan 5 blows air and the screen plate vibrates, generating light impurities such as dust and chaff, the negative pressure sucks away these impurities through the suction pipe 4, preventing impurities from adhering to the surface of the screen hole 82, the air hole 85 or the protrusion 86, and at the same time preventing dust from overflowing from the stone hopper 22 and the discharge hopper 23.

[0029] To ensure that the discharge processes do not interfere with each other, please refer to [the relevant documentation]. Figure 3 The outer shell mechanism 2 includes an outer shell 21, which is located on the upper part of four support legs 1. A support plate 24 is provided at the front of the outer shell 21, a discharge hopper 23 is provided at the front of the outer shell 21, and a stone discharge hopper 22 is provided at the right side of the outer shell 21. The inner cavities of the outer shell 21, the stone discharge hopper 22 and the discharge hopper 23 are connected.

[0030] During implementation, the stone discharge hopper 22 is located on the right side of the outer shell 21 and communicates with the inner cavity of the outer shell 21. It receives the stones separated by the screening mechanism 8 and guides the stones to the external collection device through the inclined channel. The discharge hopper 23 is installed at the front of the outer shell 21 and communicates with the inner cavity of the outer shell 21. It receives the pure grains separated by the screening mechanism 8 and transports the pure grains to the subsequent processing equipment through the downward inclined chute. The support plate 24 holds the collection frame to receive the stones discharged from the upper layer.

[0031] Example 2: To ensure uniform material feeding and improve screening efficiency, please refer to... Figure 5 The feeding mechanism 3 includes a feeding hopper 31, which is located on the upper part of the outer shell 21. A support rod 32 is provided at the lower part of the feeding hopper 31. Several flipping plates 33 are arranged in a ring on the outer surface of the support rod 32. The feeding mechanism 3 includes a buffer plate 34, which is located on the upper part of the outer shell 21. The buffer plate 34 is higher in the front and lower in the back, and is located below the support rod 32.

[0032] During implementation, grain is poured into the feed hopper 31, and the motor 6 is started. The motor 6 drives the support rod 32 and the flipping plate 33 to rotate. The grain falls onto the buffer plate 34 after passing through the flipping plate 33, and then onto the screening mechanism 8. The flipping plate 33 effectively breaks up material lumps, such as the clumps that are easily formed by damp rice, and prevents the lumps from entering the screening mechanism 8 and causing the screen holes to become blocked. The flipping plate 33 can also achieve preliminary uniform distribution of materials by flipping, reducing the sorting load of the subsequent screening mechanism 8 and ensuring the uniformity of sorting. The buffer plate 34 buffers the impact force of the falling materials, avoiding direct impact of materials on the screen plate 81, which may cause damage to the screen plate or breakage of grains. It can also further improve the uniformity of feeding and create conditions for precise sorting.

[0033] For information on grain selection, please refer to [link / reference]. Figure 5 The transmission mechanism 7 includes a pulley 71, a transmission belt 72 on the outer surface of the pulley 71, a pulley 73 on the inner surface of the transmission belt 72 away from the pulley 71, a fixing rod 74 in the middle of the pulley 73, and two cams 75 on the outer surface of the fixing rod 74.

[0034] During implementation, the motor 6 is started, which drives the support rod 32 to rotate. The support rod 32 drives the pulley 71 to rotate. The pulley 71 drives the pulley 73 and the fixed rod 74 to rotate through the transmission belt 72. The fixed rod 74 drives the two cams 75 to rotate. The cam 75 periodically pushes up the fixed block 87 of the screening mechanism 8 through the protruding part. With the reset action of the spring 88, the screen plate 84 drives the screen plate 81 to reciprocate.

[0035] For further details, please refer to [link / reference]. Figure 5 - Figure 6The screening mechanism 8 includes four fixed plates 89, which are jointly disposed in the lower part of the inner cavity of the outer shell 21. Each of the four fixed plates 89 is provided with a spring 88, and the upper part of the four springs 88 is provided with a second screen plate 84. The lower part of the second screen plate 84 is provided with two fixed blocks 87. The second screen plate 84 is provided with several air holes 85. The upper part of the second screen plate 84 is provided with several protrusions 86. The middle part of the second screen plate 84 is provided with two connecting rods 83. The upper part of the two connecting rods 83 is provided with a first screen plate 81. The first screen plate 81 is provided with several screen holes 82. The protrusions 86 are distributed in a fish scale pattern.

[0036] During implementation, when the cam 75 rotates, the protruding part periodically lifts the fixed block 87 of the screening mechanism 8. With the reset action of the spring 88, the fixed block 87 drives the second screen plate 84, the connecting rod 83 and the first screen plate 81 to reciprocate. The first screen plate 81 receives the material conveyed by the buffer plate 34 and performs preliminary screening of the material. Small grain particles are separated from stones that cannot pass through the screen holes 82. The small grain particles fall into the second screen plate 84 below, reducing the sorting load of the second screen plate 84. The second screen plate 84, together with the wind force blown out of the air hole 85 by the fan 5 and the guiding action of the protrusions 86, achieves precise separation of stones and grain particles. The protrusions 86 are distributed in a fish scale pattern on the upper part of the second screen plate 84. When the second screen plate 84 vibrates, the protrusions generate directional thrust on the material, guiding the heavier stones to move towards the stone hopper 22 and the lighter grain particles to move towards the discharge hopper 23.

[0037] It should be noted that the specific installation method, circuit connection method, and control method of the motor 6 used in this utility model are all conventional designs, and will not be described in detail here.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A specific gravity destoner for rice processing, comprising four support legs (1), characterized in that: The four support legs (1) are provided with a common outer shell mechanism (2) on the upper part. The outer shell mechanism (2) is provided with a feeding mechanism (3) on the upper part. The outer shell mechanism (2) is provided with a dust suction pipe (4) on the upper part. The feeding mechanism (3) is provided with a motor (6) on the left side. The feeding mechanism (3) is provided with a transmission mechanism (7) on the left side. The outer shell mechanism (2) is provided with a screening mechanism (8) in the middle. The outer shell mechanism (2) is provided with a fan (5) at the lower part.

2. The rice processing gravity destoner according to claim 1, characterized in that: The outer shell mechanism (2) includes an outer shell (21), which is located on the upper part of four support legs (1). The front part of the outer shell (21) is provided with a support plate (24), the front part of the outer shell (21) is provided with a discharge hopper (23), and the right part of the outer shell (21) is provided with a stone discharge hopper (22).

3. A specific gravity destoner for rice processing according to claim 2, characterized in that: The inner cavities of the outer shell (21), the stone hopper (22), and the material hopper (23) are interconnected.

4. A specific gravity destoner for rice processing according to claim 3, characterized in that: The feeding mechanism (3) includes a feeding hopper (31), which is located on the upper part of the outer shell (21). The lower part of the feeding hopper (31) is provided with a support rod (32), and the outer surface of the support rod (32) is arranged with a plurality of flipping plates (33).

5. A specific gravity destoner for rice processing according to claim 4, characterized in that: The feeding mechanism (3) includes a buffer plate (34), which is located on the upper part of the outer shell (21). The buffer plate (34) is higher in the front and lower in the back, and is located below the support rod (32).

6. A specific gravity destoner for rice processing according to claim 4, characterized in that: The transmission mechanism (7) includes a pulley (71) and a drive belt (72) on the outer surface of the pulley (71). A pulley (73) is provided on the inner surface of the drive belt (72) away from the pulley (71). A fixed rod (74) is provided in the middle of the pulley (73). Two cams (75) are provided on the outer surface of the fixed rod (74).

7. A specific gravity destoner for rice processing according to claim 3, characterized in that: The screening mechanism (8) includes four fixing plates (89), which are arranged together in the lower part of the inner cavity of the outer shell (21). Each of the four fixing plates (89) is provided with a spring (88), and the upper part of the four springs (88) is provided with a screen plate (84). The lower part of the screen plate (84) is provided with two fixing blocks (87). The screen plate (84) is provided with several air holes (85). The upper part of the screen plate (84) is provided with several protrusions (86). The middle part of the screen plate (84) is provided with two connecting rods (83). The upper part of the two connecting rods (83) is provided with a screen plate (81), and the screen plate (81) is provided with several screen holes (82).

8. A specific gravity destoner for rice processing according to claim 7, characterized in that: Several of the bumps (86) are distributed in a fish-scale pattern.

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