Pressure regulating and material guiding linkage rice mill

Abstract

The utility model relates to a kind of pressure regulation and material flow guide linkage's rice mill, including machine body, hopper, mill box, pressure regulating mechanism and material flow guide mechanism, the mill box is installed in machine body interior, mill box feed inlet is communicated with hopper, the side of mill box is provided with adjusting port, pressure regulating mechanism is slidably arranged in adjusting port, and is connected with dynamic grinding roller, by driving pressure regulating mechanism along adjusting port sliding, dynamic grinding roller is driven to move, to adjust the mill spacing between dynamic grinding roller and fixed grinding roller;Further, by pressure regulation and material flow guide linkage, the precise continuous regulation of mill pressure and the synchronous self-adapting adjustment of discharge channel are realized, seal dustproof and material smooth discharge are considered, and the processing precision, applicability and operation reliability of rice mill are significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of rice milling machine technology, specifically to a rice milling machine milling pressure adjustment mechanism, a material guiding mechanism, and the linkage between the two. Background Technology

[0002] In existing rice milling machine structures, a common design is a "one moving, two fixed" grinding roller layout. This involves setting up one movable moving grinding roller and two relatively fixed grinding rollers, which together form a double-sided grinding gap to improve grinding efficiency and uniformity. After the paddy rice enters the grinding chamber through the hopper, it needs to be guided by a guide plate to the gap between the moving grinding roller and the two fixed grinding rollers on both sides, thereby achieving efficient and symmetrical grinding operations.

[0003] However, in actual use, to adapt to different rice varieties or processing precision requirements, it is necessary to frequently adjust the grinding distance between the moving and stationary grinding rollers. Traditional adjustment methods usually involve manually moving the moving roller using a screw or eccentric mechanism. However, the guide plates are mostly fixed or independently adjustable structures. When the position of the moving roller changes, if the guide plate cannot move synchronously, the relative position between its discharge end and the feed end of the moving roller will shift, causing the guide channel to narrow or even misalign. This can easily lead to grain accumulation and blockage at the inlet, affecting the smoothness of feeding, and in severe cases, even causing equipment overload or shutdown. Manually adjusting the guide plate position is not only cumbersome, time-consuming, and labor-intensive, but also makes it difficult to ensure precise alignment between the guide plate and the feed inlet of the grinding roller, affecting production efficiency. Utility Model Content

[0004] This utility model provides a rice milling machine with pressure regulation and material guiding linkage, including a machine body, a hopper, a grinding box, a pressure regulation mechanism, and a material guiding mechanism. The grinding box is installed inside the machine body, and the feed inlet of the grinding box is connected to the hopper. An adjustment port is opened on one side of the grinding box. The pressure regulation mechanism is slidably set on the adjustment port and connected to the moving grinding roller. By driving the pressure regulation mechanism to slide along the adjustment port, the moving grinding roller is moved to adjust the grinding distance between the moving grinding roller and the stationary grinding roller.

[0005] Preferably, the pressure regulating mechanism includes a sealing plate, a support block, and an outer frame, wherein the sealing plate slides within a receiving groove formed on the inner wall of the regulating port. The support block and the outer frame are disposed opposite to each other on both sides of the sealing plate and move synchronously with the sealing plate. The movable grinding roller is rotatably mounted on the support block and driven by a motor.

[0006] Preferably, the pressure regulating mechanism further includes an adjusting screw arranged in the horizontal direction. One end of the adjusting screw is rotatably connected to the outer frame. The outer frame is adapted to have an internal thread. A limiting block with an adapted internal thread is also fitted on the screw. The outer frame is moved by rotating the screw. A handwheel is provided at the outer end of the adjusting screw for manually adjusting the sliding position of the support block.

[0007] Preferably, the outer frame is connected to the machine body shell via several springs on the side away from the adjusting screw, or to the fixed plate fixed on the grinding box via several springs.

[0008] Preferably, sliding holes are provided on both sides of the grinding box perpendicular to the adjustment port to help realize the linkage between pressure adjustment and material guidance.

[0009] Preferably, the material guiding mechanism includes a first connecting rod, a second connecting rod, a long rod, a third connecting rod, a first guide plate, and a second guide plate. The first connecting rod is connected to the second connecting rod, the second connecting rod is connected to the first guide plate, the second connecting rod is connected to the long rod, one end of the long rod is connected to the third connecting rod, and one end of the third connecting rod is connected to the second guide plate.

[0010] Preferably, one end of connecting rod one is fixedly mounted on the upper part of the outer frame, and the other end is connected to the first connection port at the bottom of connecting rod two; the long rod is horizontally mounted above connecting rod one, one end is connected to the second connection port at the bottom of connecting rod two, and the other end is connected to the bottom of connecting rod three; guide plate one and guide plate two are mounted inside the grinding box, guide plate one is connected to connecting rod two and extends outward along the sliding hole on one side of the grinding box, and guide plate two is connected to connecting rod three and extends outward along the sliding hole on the other side of the grinding box.

[0011] Preferably, the first guide vane is connected to the second connecting rod by bolts, and the second guide vane is connected to the third connecting rod by bolts.

[0012] Preferably, both connecting rod 2 and connecting rod 3 are L-shaped.

[0013] Preferably, both connecting rod 2 and connecting rod 3 are integrally formed rigid structures.

[0014] Preferably, an elastic sealing strip is provided on the contact surface between the storage groove and the sealing plate. The elastic sealing strip is made of rubber and is used to prevent dust from overflowing from the adjustment port, while also buffering, reducing noise, and improving the cleanliness and operational safety of the equipment.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting a sliding pressure adjustment mechanism, mounts the moving grinding roller on a movable support block, and drives the support block to slide within the adjustment port through an adjusting screw, thereby precisely controlling the grinding distance between the moving grinding roller and the two sets of fixed grinding rollers. With the help of springs to provide auxiliary elastic support, it not only achieves continuous and stable adjustment of grinding pressure, but also adapts to the processing needs of different varieties of rice, effectively avoiding over-grinding or under-grinding, improving the rice yield and surface smoothness. With the sealing plate and elastic sealing strip structure, it effectively prevents dust from overflowing, improving the cleanliness and operational safety of the equipment.

[0016] 2. This utility model incorporates a linkage design between pressure regulation and material discharge guidance. A linkage mechanism transmits the movement of the support block to the guide plate: when the position of the moving grinding roller is adjusted, the outer frame moves, and through the transmission of connecting rod one, connecting rod two, the long rod, and connecting rod three, the positions of guide plate one and guide plate two are adjusted synchronously. This linkage structure achieves adaptive matching between the change in grinding gap and the width of the discharge channel. The guide plate moves synchronously when the moving grinding roller is adjusted, effectively preventing misalignment and blockage of the feed inlet caused by adjustment, ensuring smooth and efficient grinding operations. The linkage mechanism facilitates installation, replacement, and size adjustment to adapt to actual production.

[0017] 3. This invention utilizes a double-stage grinding gap formed by a moving grinding roller and upper and lower fixed grinding rollers to achieve continuous secondary grinding of rice, thereby improving processing precision. By employing the upper and lower distributed grinding gaps and combining them with a secondary grinding process, the rice enters the fine grinding zone again after the initial hulling for thorough polishing and cleaning. This not only effectively improves grinding uniformity, rice grain integrity, and reduces broken rice rate, but also increases rice yield and rice surface smoothness. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the positional relationship between the connecting rod and the pressure regulating mechanism of this utility model; Figure 3 This is a schematic plan view of the internal structure of the grinding box of this utility model; Figure 4 This is a schematic diagram of the pressure regulation and material guiding linkage structure of this utility model; Figure 5 This is a schematic diagram of the grinding box structure of this utility model; Figure 6 This is a schematic diagram of the pressure regulating structure of this utility model; Figure 7 This is a schematic diagram of the support block fixing structure of this utility model.

[0020] Figure label: 1. Machine body; 2. Hopper; 3. Grinding box; 4. Pressure regulating mechanism; 5. Material guiding mechanism; 6. Adjustment port; 7. Moving grinding roller; 8. Fixed grinding roller; 9. Sliding hole; 10. Sealing plate; 11. Support block; 12. Outer frame; 13. Storage trough; 14. Motor; 15. Adjusting screw; 16. Limiting block; 17. Machine shell; 18. Fixing plate; 19. Spring; 20. Connecting rod one; 21. Connecting rod two; 22. Long rod; 23. Connecting rod three; 24. Guide plate one; 25. Guide plate two; 26. First connection port; 27. Second connection port; 28. Handwheel. Detailed Implementation

[0021] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] Please refer to Figures 1-7 This utility model provides a rice milling machine that links pressure regulation and material flow guidance.

[0023] This invention can be used to dehull and whiten paddy rice, removing the husk and polishing the surface of the rice grains to obtain white rice, thereby improving the rice yield and grain integrity. The pressure regulating mechanism 4 is mainly used to control the milling precision to adapt to different paddy varieties or processing requirements, and it is linked with the discharge guiding mechanism to achieve adaptive matching between the milling gap change and the width of the discharge channel.

[0024] In this embodiment, when the grinding pressure needs to be adjusted, the operator first rotates the handwheel 28 at the outer end of the adjusting screw 15, driving the adjusting screw 15 to move axially under the action of the thread. Since one end of the adjusting screw 15 is rotatably connected to the outer frame 12, its axial movement pushes or pulls the outer frame 12 to slide horizontally along the adjustment direction, thereby driving the support block 11 fixed thereto to slide within the adjustment port 6, thereby driving the moving grinding roller 7 to move, realizing the precise adjustment of the grinding gap between the moving grinding roller 7 and the two fixed grinding rollers 8. At the same time, the movement of the support block 11 is transmitted to the guide plate 24 and the guide plate 25 through the connecting rod 1 20, the connecting rod 21, the long rod 22, and the connecting rod 3 23, so that they adjust their positions synchronously, ensuring that the material smoothly enters the grinding gap.

[0025] In a further embodiment, the sealing plate 10 slides in the receiving groove 13 opened in the inner wall of the adjustment port 6, and the moving grinding roller 7 is rotatably mounted on the support block 11 and driven by the motor 14.

[0026] In a further embodiment, one end of the adjusting screw 15 is rotatably connected to the outer frame 12, and a limiting block 16 with an adaptive internal thread is sleeved on the adjusting screw 15. A handwheel is provided at the outer end of the adjusting screw 15 for manually adjusting the sliding position of the support block 11.

[0027] In a further embodiment, to ensure stability during the adjustment process, a number of springs 19 are connected between the side of the outer frame 12 away from the adjusting screw 15 and the housing 17 or the fixing plate 18 fixed on the housing 17. These springs 19 not only provide auxiliary elastic support, but also buffer the pressure impact that may occur during the adjustment process.

[0028] In a further embodiment, during the movement of the support block 11, the synchronous movement of the outer frame 12 serves as the power input, transmitting motion through a connecting rod 20 fixedly mounted thereon. Connecting rod 20 and connecting rod 21 form the first stage of transmission. When the outer frame 12 moves, connecting rod 20 drives (or pushes) connecting rod 21 to move horizontally. Connecting rod 21 drives the guide plate 24 to slide synchronously along the sliding hole 9 on the grinding box 3. Furthermore, a long rod 22 is also connected to connecting rod 21. The other end of 2 is connected to the third connecting rod 23, which in turn is connected to the second guide plate 25, forming a second-stage linkage structure. As the second connecting rod 21 moves, the motion is transmitted to the second guide plate 25 via the long rod 22 and the third connecting rod 23, so that it moves in coordination with the first guide plate 24. The second connecting rod 23 drives the second guide plate 25 to slide synchronously along the sliding hole 9, ensuring that the two guide plates are always accurately aligned with the feed inlet between the moving grinding roller 7 and the upper and lower fixed grinding rollers 8 during the adjustment of the moving grinding roller 7, thus achieving linkage.

[0029] The connecting rods can be connected by hinges, fixed connections, or any connection method that can achieve a linkage effect. Throughout the adjustment process, the first guide plate (24) and the second guide plate (25) always maintain precise alignment with the feed end of the moving grinding roller (7), and the three of them always move in the same direction and have the same displacement, so as to achieve stable and reliable linkage guidance. With hinged connection, each connecting rod can rotate freely during the movement, ensuring that the mechanism transmits the movement flexibly, smoothly and without interference within the adjustment stroke. Under the limiting action of the sliding hole 9, the guide plates move synchronously and in the same direction when the moving grinding roller is adjusted. With fixed connection, the system stability is higher, but in order to avoid jamming, the requirement for higher precision is increased. Technicians can choose according to actual production needs.

[0030] In a further embodiment, guide plate 1 24 is located between the moving grinding roller 7 and the upper fixed grinding roller 8, and guide plate 25 is located between the moving grinding roller 7 and the lower fixed grinding roller 8.

[0031] In a further embodiment, one end of connecting rod 20 is fixedly mounted on the upper part of the outer frame 12, and the other end is connected to the first connection port 25 at the bottom of connecting rod 21; long rod 22 is horizontally mounted above connecting rod 20, one end is connected to the second connection port 27 at the bottom of connecting rod 21, and the other end is connected to the bottom of connecting rod 23; guide plate 24 and guide plate 25 are mounted inside the grinding box 3, guide plate 24 is connected to connecting rod 21 and extends outward along the sliding hole 9 on one side of the grinding box 3, and guide plate 25 is connected to connecting rod 23 and extends outward along the sliding hole 9 on the other side of the grinding box 3.

[0032] In a further embodiment, a dedicated bran discharge port can be provided on the shell of the grinding chamber, typically located near or below the gap between the grinding rollers. The discharge port is connected to an external negative pressure fan (such as a centrifugal fan) via a bran discharge channel (duct). When the fan starts, a negative pressure is created within the grinding chamber. Air carrying light rice bran is drawn into the duct through the discharge port and transported to a cyclone separator or bran collection hopper, where the bran settles and is collected. The purified air is then discharged. This method eliminates the need for an internal screen, ensures continuous and efficient bran discharge, and effectively prevents bran powder backflow.

[0033] In a further embodiment, an auxiliary baffle may preferably be provided on the guide plate to assist in the discharge of bran. During the grinding process, the bran will be peeled off and discharged with the airflow or gravity. The inclined design of the baffle helps to intercept some of the particles that have not been completely dehulled, allowing them to re-enter the grinding zone, while allowing the lighter bran to be discharged from the top or side, reducing the residue of impurities.

[0034] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rice milling machine with pressure regulation and material flow guidance linkage, characterized in that: The machine includes a body (1), a hopper (2), a grinding box (3), a pressure regulating mechanism (4), and a material guiding mechanism (5). The grinding box (3) is installed inside the body (1). The feed inlet of the grinding box (3) is connected to the hopper (2). An adjustment port (6) is provided on one side of the grinding box (3). The pressure regulating mechanism (4) is slidably disposed on the adjustment port (6) and connected to the moving grinding roller (7). By driving the pressure regulating mechanism (4) to slide along the adjustment port (6), the moving grinding roller (7) is moved to adjust the grinding distance between the moving grinding roller (7) and the fixed grinding roller (8). Sliding holes (9) are provided on both sides of the grinding box (3) that are perpendicular to the adjustment port (6).

2. The rice milling machine according to claim 1, characterized in that: The pressure regulating mechanism (4) includes a sealing plate (10), a support block (11) and an outer frame (12). The sealing plate (10) slides in the receiving groove (13) opened on the inner wall of the regulating port (6). The support block (11) and the outer frame (12) are arranged opposite to each other on both sides of the sealing plate (10) and move synchronously with the sealing plate (10). The moving grinding roller (7) is rotatably arranged on the support block (11) and driven by a motor (14).

3. The rice milling machine according to claim 2, characterized in that: The pressure regulating mechanism (4) also includes an adjusting screw (15) arranged in the horizontal direction. One end of the adjusting screw (15) is rotatably connected to the outer frame (12), and a limiting block (16) with an internal thread is sleeved on the screw.

4. The rice milling machine according to claim 3, characterized in that, The adjusting screw (15) is provided with a handwheel (28) at its outer end.

5. The rice milling machine according to claim 4, characterized in that: An elastic sealing strip is provided on the contact surface between the storage groove (13) and the sealing plate (10).

6. The rice milling machine according to claim 5, characterized in that: The outer frame (12) is connected to the machine body shell (17) by several springs (19) on the side away from the adjusting screw (15), or by several springs (19) on the fixing plate (18) fixed on the grinding box (3).

7. The rice milling machine according to claim 6, characterized in that: The material guiding mechanism (5) includes a first connecting rod (20), a second connecting rod (21), a long rod (22), a third connecting rod (23), a first guide plate (24), and a second guide plate (25). The first connecting rod (20) is connected to the second connecting rod (21), the second connecting rod (21) is connected to the first guide plate (24), the second connecting rod (21) is connected to the long rod (22), one end of the long rod (22) is connected to the third connecting rod (23), and one end of the third connecting rod (23) is connected to the second guide plate (25).

8. The rice milling machine according to claim 7, characterized in that: One end of the first connecting rod (20) is fixedly set on the upper part of the outer frame (12), and the other end is connected to the first connection port (26) at the bottom of the second connecting rod (21); the long rod (22) is horizontally set above the first connecting rod (20), one end is connected to the second connection port (27) at the bottom of the second connecting rod (21), and the other end is connected to the bottom of the third connecting rod (23); the first guide plate (24) and the second guide plate (25) are set inside the grinding box (3), the first guide plate (24) is connected to the second connecting rod (21) and extends outward along the sliding hole (9) on one side of the grinding box (3), the second guide plate (25) is connected to the third connecting rod (23) and extends outward along the sliding hole (9) on the other side of the grinding box (3).

9. The rice milling machine according to claim 8, characterized in that: Both connecting rod 2 (21) and connecting rod 3 (23) are L-shaped and preferably integrally formed.

10. The rice milling machine according to claim 9, characterized in that, An auxiliary baffle may be installed on the second guide plate (25).

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