A multi-stage concentric nested continuous rice mixing device

Abstract

This utility model discloses a multi-stage concentric nested continuous rice mixing device, relating to the field of rice mixing equipment technology. It includes an adjustable worktable with a mixing sleeve rotatably connected to its upper wall. A mixing component is slidably connected inside the mixing sleeve. A driving component is provided between the adjustable worktable and the mixing sleeve. A base is hinged to one end of the adjustable worktable near the discharge port of the mixing sleeve. This utility model uses a rotating cylinder to achieve mixing by gravity-driven material tumbling. A buffer layer is fixed to the inner wall of the fine material cylinder. During the mixing process, there are no mechanical stirring components directly shearing the rice, effectively reducing the secondary breakage rate. Simultaneously, under the centrifugal force and gravity generated by the cylinder's rotation, broken rice synchronously passes through the screening screen and falls into the outer coarse material cylinder during the mixing process, achieving integrated mixing and broken rice screening, reducing the equipment and process costs of subsequent separate screening steps.

Description

Technical Field

[0001] This utility model relates to the field of rice mixing equipment technology, specifically a multi-level concentric nested continuous rice mixing device. Background Technology

[0002] Rice blending is an important process that involves mixing different varieties and qualities of rice in a certain proportion to improve the taste, appearance and nutritional content of cooked rice. It is widely used in the rice processing industry. For example, the utility model patent with announcement number CN205760925U discloses a rice mixing device that uses a screw conveyor in the channel to mix and transport rice grains by using spiral blades, while a blower is used to accelerate the mixing of rice grains. However, the screw conveyor's spiral blades exert a large shearing force on the rice, which can easily cause secondary breakage during the conveying process, affecting the integrity of the finished rice. In addition, the device does not have a screening function, and a separate screening process is required after mixing to remove broken rice, which increases the process steps and equipment investment. In addition, this rice dispensing device has the following drawbacks: 1. The single-stage mixing structure results in a short material residence time and limited mixing uniformity; 2. The mixing and screening processes are separated, making it impossible to simultaneously separate broken rice during the mixing process, which increases the complexity of the process and the cost of equipment; 3. Mechanical mixing components such as augers and stirring paddles can easily cause secondary breakage of rice due to the shear force exerted on it during the mixing process; Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a multi-level concentric nested continuous rice mixing device, which solves the technical problems of existing devices.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A multi-stage concentric nested continuous rice mixing device includes: an adjusting worktable with a mixing sleeve rotatably connected to its upper wall; a mixing component slidably connected inside the mixing sleeve; a driving component between the adjusting worktable and the mixing sleeve; and a base hinged to one end of the adjusting worktable near the discharge port of the mixing sleeve. The mixing component includes a coarse material cylinder with several fine material cylinders concentrically connected to its inner wall via fixed rods. The volumes of the several fine material cylinders increase progressively from the inlet to the outlet and are interlocked. Each fine material cylinder has an annular baffle plate fixed at its outlet end. A nozzle is rotatably connected to the center of the inlet of the fine material cylinder at the inlet end and the center of the outlet of the fine material cylinder at the outlet end. A buffer layer is fixedly connected to the inner wall of each fine material cylinder, and a uniformly distributed sieve filter is detachably connected inside each fine material cylinder.

[0005] Preferably, the driving assembly includes: a helical gear seat ring fitted around the outer periphery of the mixing sleeve; two limiting rings fitted around the feed end and discharge end of the mixing sleeve, respectively; two helical gear columns, both meshing on both sides of the helical gear seat ring and symmetrically arranged along the axial direction of the helical gear seat ring, one of the helical gear columns being fixedly connected to the adjusting worktable via a frame, and the other helical gear column being fixedly connected to the adjusting worktable via a drive motor; and two support rollers, both fixedly connected to the adjusting worktable via a frame, both of the support rollers being confined within the two limiting rings and symmetrically arranged along the axial direction of the helical gear seat ring, the support rollers having uniformly distributed anti-slip grooves along the axial direction.

[0006] Preferably, an electric actuator is hinged to the upper wall of the base, and a hinge seat is hinged to the driving end of the electric actuator, the hinge seat being slidably connected to the base; a transmission rod is provided between the adjusting worktable and the base, and both ends of the transmission rod are hinged to the adjusting worktable and the hinge seat respectively.

[0007] Preferably, a slider is fixedly installed on the lower wall of the hinge seat, and a groove adapted to slide along the axial direction of the mixing sleeve is formed at the center of the base.

[0008] Preferably, two guide limiting sleeves are fixedly installed on the upper wall of the base near the feed port of the mixing sleeve. The two guide limiting sleeves are symmetrically distributed along the axial direction of the mixing sleeve. A guide rod is slidably connected inside the guide limiting sleeve. A reset spring is fixedly installed between the bottom end of the guide rod and the bottom wall of the guide limiting sleeve. A top wheel is rotatably connected to the top end of the guide rod.

[0009] Preferably, all of the aforementioned material cylinders are hexagonal cylinders, and in two adjacent material cylinders, the inner material cylinder is deflected by 30 degrees relative to the outer material cylinder about a common axis.

[0010] Preferably, the mixing sleeve has several T-shaped limiting grooves that are evenly distributed around the axial direction of the mixing sleeve, and the outer wall of the coarse material cylinder is fixedly installed with a T-shaped limiting block that is slidably adapted to the T-shaped limiting grooves.

[0011] This utility model provides a multi-stage concentric nested continuous rice mixing device, which has the following beneficial effects: 1. This utility model sets up multi-level concentric nested fine material cylinders with increasing volume, and sets an annular baffle at the outlet end of each fine material cylinder, so that the rice overflows from the inner layer to the outer layer in stages during the rotation process, which prolongs the mixing path and residence time of the material in the cylinder, significantly improves the mixing uniformity, and solves the problem of short material residence time and limited mixing uniformity caused by single-stage mixing structure.

[0012] 2. This utility model uses a rotating cylinder to mix materials by gravity. The inner wall of the fine material cylinder is fixed with a buffer layer. During the mixing process, there are no mechanical agitators that directly shear the rice, effectively reducing the secondary breakage rate. At the same time, under the centrifugal force and gravity generated by the rotation of the cylinder, the broken rice passes through the screening screen and falls into the outer coarse material cylinder during the mixing process, realizing the integrated completion of mixing and broken rice screening. This reduces the equipment and process costs of setting up a separate screening process later. It solves the problem of existing equipment separating the mixing and screening processes, making it impossible to complete the separation of broken rice simultaneously during the mixing process, which increases the complexity of the process and the cost of equipment, as well as the problem of secondary breakage caused by shearing force. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the connection structure between the base and the adjustable worktable of this utility model. Figure 4 This is a schematic diagram of the connection structure of the hybrid component and the drive component of this utility model; Figure 5 This is a cross-sectional schematic diagram of the hybrid component of this utility model.

[0014] In the diagram: 1. Base; 2. Adjusting worktable; 3. Mixing sleeve; 4. Coarse material cylinder; 5. Fixing rod; 6. Fine material cylinder; 7. Annular baffle plate; 8. Nozzle; 9. Buffer layer; 10. Screening filter; 11. Helical gear seat ring; 12. Limiting ring; 13. Helical gear column; 14. Drive motor; 15. Support roller; 16. Electric push rod; 17. Hinge seat; 18. Transmission rod; 19. Slider; 20. Slide groove; 21. Guide limiting sleeve; 22. Guide rod; 23. Return spring; 24. Top wheel; 25. T-shaped limiting groove; 26. T-shaped limiting block. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] Please see Figures 1 to 5 A multi-stage concentric nested continuous rice mixing device includes a base 1, an adjusting worktable 2, a mixing sleeve 3, and mixing components; The lower end of the adjusting worktable 2 near the discharge port of the mixing sleeve 3 is hinged to the base 1, so that the adjusting worktable 2 can rotate around the hinge point, thereby adjusting the tilt angle of the mixing sleeve 3; the mixing sleeve 3 is rotatably connected to the upper wall of the adjusting worktable 2, and the mixing component is slidably connected inside the mixing sleeve 3; a driving component is provided between the adjusting worktable 2 and the mixing sleeve 3 to drive the mixing sleeve 3 to rotate. The mixing assembly includes a coarse material cylinder 4, fixed rods 5, a fine material cylinder 6, an annular baffle plate 7, a feed nozzle 8, a buffer layer 9, and a screening screen 10. Several fine material cylinders 6 are concentrically connected to the inner wall of the coarse material cylinder 4 via several fixed rods 5. The volume of the fine material cylinders 6 increases sequentially from the inlet to the outlet, and each fine material cylinder 6 is connected by an insertion joint, meaning the outlet end of the inner fine material cylinder 6 is inserted into the inlet of the adjacent outer fine material cylinder 6. An annular baffle plate 7 is fixed to the outlet end of each fine material cylinder 6, and the height of the annular baffle plate 7 determines the residence time and overflow timing of the material within that stage of the fine material cylinder 6. The innermost fine material cylinder located at the inlet end... At the center of the inlet of the feed cylinder 6 and at the center of the outlet of the outermost refined feed cylinder 6 at the outlet end, a nozzle 8 is rotatably connected. The inlet nozzle 8 is used to receive the upstream pre-mixed material, and the outlet nozzle 8 is used to discharge the mixed refined rice. A buffer layer 9 is fixedly connected to the inner wall of the refined feed cylinder 6. The buffer layer 9 can be made of food-grade rubber or polyurethane material to reduce the breakage caused by the collision between the rice and the cylinder wall. A uniformly distributed sieve filter 10 can also be detachably connected to the cylinder wall of the refined feed cylinder 6. The pore size of the sieve filter 10 is slightly smaller than the minimum particle size of the whole rice grain, so that broken rice can pass through while whole rice grains cannot.

[0017] The material cylinder 6 is preferably a hexagonal cylinder, and in two adjacent material cylinders 6, the inner material cylinder 6 is deflected by 30 degrees relative to the outer material cylinder 6 around a common axis; the hexagonal cross section causes the material to generate periodic rising and falling motions during the rotation of the cylinder, enhancing the convective mixing effect; the 30-degree misalignment between adjacent cylinders causes the material to fall into the cylinder wall at an intersecting position when overflowing from the inner layer to the outer layer, further enhancing turbulent mixing.

[0018] The coarse material cylinder 4 and the mixing sleeve 3 are detachably connected by a sliding structure; the inner wall of the mixing sleeve 3 is provided with several T-shaped limiting grooves 25, which are evenly distributed around the axis of the mixing sleeve 3; the outer wall of the coarse material cylinder 4 is fixedly installed with T-shaped limiting blocks 26 that slide and adapt to the T-shaped limiting grooves 25; when installing the mixing component, simply push the T-shaped limiting blocks 26 into the T-shaped limiting grooves 25; when disassembling, pull them out in the opposite direction for easy cleaning and maintenance.

[0019] The feed nozzle 8 at the feed end is equipped with a cross-shaped diverter plate, which makes the incoming rice evenly distributed across the entire cross-section of the innermost fine material cylinder 6, avoiding material stratification caused by concentrated feeding and improving the uniformity of mixing.

[0020] The discharge end of the mixing sleeve 3 is equipped with a concentric annular baffle, which divides the discharge port area into two parts: the central area corresponds to the outlet of the outermost fine material cylinder 6 and is used to discharge the mixed fine rice; the outer annular area corresponds to the outer space of the coarse material cylinder 4 and is used to discharge the screened broken rice; the two flow into different collection bins through corresponding pipes to prevent the fine rice and broken rice from being mixed again.

[0021] The drive assembly includes a helical gear seat 11, a limiting ring 12, two helical gear spurs 13, a drive motor 14, and a support roller 15. The helical gear seat 11 is fixedly sleeved on the middle of the outer circumference of the mixing sleeve 3, and the two limiting rings 12 are respectively fixedly sleeved on the feed end and the discharge end of the mixing sleeve 3. The two helical gear spurs 13 are respectively meshed on both axial sides of the helical gear seat 11 and are symmetrically arranged. One of the helical gear spurs 13 is fixedly connected to the adjusting worktable 2 through the frame and serves as a driven support wheel; the other helical gear spur 13 is fixedly connected to the adjusting worktable 2 through the drive motor 14 and serves as a driven support wheel. The drive wheel is the active drive wheel; when the drive motor 14 is running, it drives the active helical gear column 13 to rotate, which drives the mixing sleeve 3 to rotate synchronously through the helical gear seat ring 11; both support rollers 15 are fixedly connected to the adjustment worktable 2 through the frame and respectively abut against the two limit rings 12. The support rollers 15 and the helical gear column 13 are symmetrically distributed along the axial direction of the helical gear seat ring 11 to limit the axial movement of the mixing sleeve 3; the outer circumferential surface of the support roller 15 is provided with uniformly distributed anti-slip grooves along the axial direction to increase the friction between it and the limit ring 12, ensuring that the mixing sleeve 3 rotates smoothly and without slippage; An angle adjustment mechanism is also provided between the base 1 and the adjustment worktable 2. The angle adjustment mechanism includes an electric push rod 16, a hinge seat 17, and a transmission rod 18. The cylinder end of the electric push rod 16 is hinged to the upper wall of the base 1, and the telescopic end of the electric push rod 16 is hinged to the hinge seat 17. A slider 19 is fixedly installed on the lower wall of the hinge seat 17. A groove 20 that is adapted to slide along the axis of the mixing sleeve 3 is opened at the center of the base 1, so that the hinge seat 17 can slide horizontally along the groove 20. The two ends of the transmission rod 18 are respectively hinged to the end of the adjustment worktable 2 away from its hinge point and the hinge seat 17. When the electric push rod 16 extends or retracts, it drives the hinge seat 17 to move along the groove 20, and drives the adjustment worktable 2 to rotate around its hinge point with the base 1 through the transmission rod 18, thereby realizing the stepless adjustment of the tilt angle of the mixing sleeve 3. To further improve the stability of angle adjustment, two guide limit sleeves 21 are fixedly installed on the upper wall of the base 1 near the feed inlet of the mixing sleeve 3. The two guide limit sleeves 21 are symmetrically distributed along the axial direction of the mixing sleeve 3. A guide rod 22 is slidably connected inside each guide limit sleeve 21. A return spring 23 is fixedly installed between the bottom end of the guide rod 22 and the bottom wall of the guide limit sleeve 21. A top wheel 24 is rotatably connected to the top end of the guide rod 22. The top wheel 24 abuts against the lower wall of the adjusting worktable 2. When the adjusting worktable 2 tilts downward, the adjusting worktable 2 presses down on the top wheel 24, and the guide rod 22 compresses the return spring 23. The rebound force of the return spring 23 provides an upward auxiliary support force for the adjusting worktable 2 through the top wheel 24, reducing the load on the electric push rod 16 and improving the smoothness of the adjustment process. Specifically: The electric actuator 16 is activated, pushing the hinge seat 17 to move horizontally along the slide groove 20 on the base 1. This, in turn, drives the adjusting table 2 to rotate around the hinge point via the transmission rod 18, steplessly adjusting the tilt angle of the mixing sleeve 3. During adjustment, the return spring 23 inside the guide limit sleeve 21 pushes the guide rod 22 and the top wheel 24 against the lower wall of the adjusting table 2, providing auxiliary support to reduce the load on the electric actuator 16.

[0022] After the angle is adjusted to the correct position, the drive motor 14 is started. The drive motor 14 drives the active helical gear column 13 to rotate, which in turn drives the mixing sleeve 3 to rotate synchronously through the helical gear seat ring 11. The helical gear column 13 on the driven side plays a role in supporting and counteracting axial force. The two support rollers 15 are engaged in the limiting rings 12 at both ends of the mixing sleeve 3 to prevent axial movement. The anti-slip grooves on the surface of the support rollers 15 ensure that the mixing sleeve 3 rotates smoothly without slippage.

[0023] At this point, the pre-mixed rice from upstream is fed into the feed nozzle 8. The rice is evenly distributed across the entire cross-section of the innermost refining cylinder 6 by the cross-shaped diverter inside the nozzle 8, preventing stratification caused by concentrated feeding. The material rises and falls with the cylinder wall within the rotating hexagonal refining cylinder 6, generating convection mixing. After accumulating to a height exceeding the annular baffle 7, it overflows evenly from the inner ring and enters the next, larger refining cylinder 6 for further mixing. During the mixing process, broken rice passes through the screening screen 10 under centrifugal force and gravity, falling into the outer coarse material cylinder 4.

[0024] The mixed refined rice flows out from the center outlet of the outermost refined material cylinder 6 through the discharge nozzle 8, while the screened broken rice flows out from the outer annular outlet area of ​​the coarse material cylinder 4. The concentric annular baffle at the discharge end of the mixing sleeve 3 separates the two areas to prevent secondary mixing of refined rice and broken rice. Both flow into the collection bin through their respective pipes.

[0025] When shutting down, first stop feeding and let the mixing sleeve 3 continue to rotate for 3 to 5 minutes to drain the residual material in the sleeve. After turning off the drive motor 14, reset the electric push rod 16 to restore the adjustment table 2 to a horizontal position. Finally, open the cleaning port to rinse the inside of the mixing component. After cleaning, you can prepare for the next batch of production.

[0026] 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 multi-stage concentric nested continuous rice mixing device, characterized in that, include: Adjustable worktable (2), with a mixing sleeve (3) rotatably connected to its upper wall, a mixing component slidably connected inside the mixing sleeve (3), a driving component is provided between the adjustable worktable (2) and the mixing sleeve (3), and a base (1) is hinged to one end of the adjustable worktable (2) near the discharge port of the mixing sleeve (3). The mixing assembly includes a coarse material cylinder (4), whose inner wall is concentrically connected to several fine material cylinders (6) via a fixing rod (5); the volume of the several fine material cylinders (6) increases from the inlet to the outlet and they are interlocked; each fine material cylinder (6) has an annular baffle plate (7) fixed at its outlet end; a nozzle (8) is rotatably connected at the center of the inlet of the fine material cylinder (6) at the inlet end and at the center of the outlet of the fine material cylinder (6) at the outlet end; a buffer layer (9) is fixedly connected to the inner wall of the fine material cylinder (6); and a uniformly distributed sieve filter screen (10) is detachably connected inside the fine material cylinder (6).

2. The multi-stage concentric nested continuous rice mixing device according to claim 1, characterized in that, The driving component includes: A helical tooth seat (11) is fitted around the outer periphery of the mixing sleeve (3); two limiting rings (12) are fitted onto the feed end and discharge end of the mixing sleeve (3) respectively; Two helical gear columns (13) mesh on both sides of the helical gear seat (11) and are symmetrically arranged along the axial direction of the helical gear seat (11). One of the helical gear columns (13) is fixedly connected to the adjustment worktable (2) through the frame, and the other helical gear column (13) is fixedly connected to the adjustment worktable (2) through the drive motor (14). Two support rollers (15) are fixedly connected to the machine frame and the adjustment worktable (2). The two support rollers (15) are both restricted in two limit rings (12) and are symmetrically arranged along the axial direction of the helical tooth seat ring (11). The support rollers (15) are provided with uniformly distributed anti-slip grooves along the axial direction.

3. The multi-stage concentric nested continuous rice mixing device according to claim 1, characterized in that, An electric actuator (16) is hinged to the upper wall of the base (1), and a hinge seat (17) is hinged to the driving end of the electric actuator (16). The hinge seat (17) is slidably connected to the base (1). A transmission rod (18) is provided between the adjustment worktable (2) and the base (1). The two ends of the transmission rod (18) are respectively hinged to the adjustment worktable (2) and the hinge seat (17).

4. The multi-stage concentric nested continuous rice mixing device according to claim 3, characterized in that, The lower wall of the hinge seat (17) is fixedly installed with a slider (19), and the center of the base (1) is provided with a groove (20) that is adapted to slide with the slider (19) along the axial direction of the mixing sleeve (3).

5. A multi-stage concentric nested continuous rice mixing device according to claim 1, characterized in that, Two guide limiting sleeves (21) are fixedly installed on the upper wall of the base (1) near the feed port of the mixing sleeve (3). The two guide limiting sleeves (21) are symmetrically distributed along the axial direction of the mixing sleeve (3). A guide rod (22) is slidably connected inside the guide limiting sleeve (21). A reset spring (23) is fixedly installed between the bottom end of the guide rod (22) and the bottom wall of the guide limiting sleeve (21). A top wheel (24) is rotatably connected to the top end of the guide rod (22).

6. The multi-stage concentric nested continuous rice mixing device according to claim 1, characterized in that, All of the aforementioned material cylinders (6) are hexagonal cylinders. In two adjacent material cylinders (6), the inner material cylinder (6) is deflected by 30 degrees relative to the outer material cylinder (6) around a common axis.

7. A multi-stage concentric nested continuous rice mixing device according to claim 1, characterized in that, The mixing sleeve (3) has several T-shaped limiting grooves (25) that are evenly distributed around the mixing sleeve (3) axially. The outer wall of the coarse material cylinder (4) is fixedly installed with a T-shaped limiting block (26) that is slidably adapted to the T-shaped limiting grooves (25).

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