A food material grinding and screening device and method

Abstract

The application discloses a food raw material grinding and screening device and method, and relates to the technical field of food raw material processing.The device comprises a grinding tank, a power output mechanism, an upper layer crushing mechanism and a lower layer grinding mechanism; the power output mechanism is installed in the interior of the grinding tank and is used to drive the upper layer crushing mechanism and the lower layer grinding mechanism to rotate; the upper layer crushing mechanism and the lower layer grinding mechanism are both located in the interior of the grinding tank, and the upper layer crushing mechanism is located above the lower layer grinding mechanism; the three-layer coaxial integrated structure of upper layer crushing + lower layer fine grinding + bottom screening is adopted, the processes originally dispersed on multiple independent devices are highly integrated, the food raw material does not need to be transferred back and forth between different devices, the raw material pretreatment processing can be completed in the same closed cavity, the food raw material transfer in the process of connecting multiple devices is avoided, a single power output can drive the upper layer crushing mechanism and the lower layer grinding mechanism to synchronously operate, and the overall structure of the device is simplified.

Description

Technical Field

[0001] This invention relates to the field of food raw material processing technology, and in particular to a food raw material grinding and sieving device and method. Background Technology

[0002] Food raw material pretreatment is a core pre-processing step in food processing. Among them, grinding and sieving directly determine the particle size uniformity and fineness of food raw materials, and also affect the efficiency of subsequent processing steps and the quality of finished food products.

[0003] The raw material grinding and screening equipment used in the food processing industry is mostly of a split structure. The crushing, grinding and screening processes correspond to independent processing equipment. Each piece of equipment is set up separately and driven independently. Raw materials need to be transferred back and forth between multiple pieces of equipment and processed step by step. The overall production line structure is complicated, the equipment occupies a large area, and problems such as raw material spillage, contamination and residue are prone to occur during the transfer process.

[0004] Integrated food grinding equipment, with its coaxial, same-speed operation for both crushing and grinding stations, cannot adapt to the diverse processing needs of food raw materials. For large, hard food raw materials such as nuts, grains, and hard fruits and vegetables, low-speed crushing is insufficient to achieve thorough splitting and crushing, easily resulting in large particles directly entering the grinding station, leading to insufficient grinding and inconsistent particle size in the finished product. On the other hand, if a high-speed integrated operation mode is used, the high-speed friction at the grinding station generates a large amount of heat, which can easily deactivate heat-sensitive components such as vitamins and active enzymes in the food raw materials. It can also easily cause the raw materials to char and stick together, seriously affecting the processing quality of the food raw materials and making it difficult to guarantee the product qualification rate.

[0005] Most of the substandard coarse particles screened out during the screening process are either directly discarded or manually recycled for secondary processing, lacking an automated closed-loop processing structure. Manual recycling and reprocessing are time-consuming, labor-intensive, and costly, and the timeliness of raw material recycling and processing is poor. Discarding coarse particles results in significant waste of raw materials, leading to low overall raw material utilization.

[0006] Therefore, it is necessary to invent a food raw material grinding and sieving device and method to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a food raw material grinding and screening device and method, which realizes high-speed impact crushing of the upper crushing mechanism and low-speed stable grinding of the lower grinding mechanism. The high-speed rotating upper crushing teeth can effectively split and crush large hard raw materials instantly, while the low-speed rotating lower grinding mechanism can avoid the deactivation of heat-sensitive components of food raw materials caused by excessive frictional heat generation during high-speed grinding.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a food raw material grinding and screening device, comprising a grinding tank, a power output mechanism, an upper crushing mechanism, and a lower grinding mechanism; The power output mechanism is installed inside the grinding tank and is used to drive the upper crushing mechanism and the lower grinding mechanism to rotate; Both the upper crushing mechanism and the lower grinding mechanism are located inside the grinding tank, with the upper crushing mechanism located above the lower grinding mechanism; A filter screen is installed at the bottom of the lower grinding mechanism; The lower grinding mechanism includes a vortex grinding plate, a rotary grinding plate, and a discharge cylinder; The vortex grinding plate is installed on top of the filter screen. The vortex grinding plate slide is vortex-shaped and has multiple sections. Each section of the vortex grinding plate slide has a reset opening at the beginning. The rotating grinding plate includes a support frame and multiple grinding plates; The second bracket is mounted on the power output mechanism, and the grinding plate is slidably mounted on the bottom of the second bracket; When the second support rotates, it drives multiple grinding plates to slide along the corresponding section of the vortex grinding plate slide, and grinds the food raw materials. When the grinding plate rotates to correspond to the reset opening, it slides through the reset opening to the first end of the vortex grinding plate slide. The discharge cylinder is coaxially mounted on the filter screen and extends to the outside of the grinding tank.

[0009] Optionally, the rotary grinding plate may also include guide rails, sliders, and compression springs; The guide slide is located at the bottom of bracket two, and the slider is installed on the top of the grinding plate and slides along the guide slide; The two ends of the compression spring are connected to the inner end wall of the guide slide and the slider, respectively, and the compression spring is always in a charged state.

[0010] Optionally, an inlet is provided on the outside of the discharge cylinder, which is located above the filter screen and corresponds to the rotating grinding plate; The discharge end of the discharge cylinder is located outside the grinding tank and is fixedly installed with a mounting flange.

[0011] Optionally, the upper crushing mechanism includes a rotary disc and a cutter; The rotary disc is installed on top of the power output mechanism, and a material drop space is formed between the rotary disc and the grinding jar; Multiple cutters are mounted on top of the rotating disk in a circular array.

[0012] Optionally, the power take-off mechanism includes a drive unit and an output shaft; The drive unit is installed on the inner bottom wall of the grinding tank, and the output shaft is installed at the output end of the drive unit and is used to drive the upper crushing mechanism and the lower grinding mechanism to rotate.

[0013] Optionally, the output shaft is provided with two sections, and an accelerator is installed between the two sections of the output shaft. A bracket is installed on the outside of the accelerator to contact the inner wall of the grinding jar.

[0014] Optionally, the grinding jar includes an upper jar body and a lower jar body installed at the bottom of the upper jar body; A material hopper is installed on the top of the upper tank, and two inclined guide plates are installed inside the upper tank. A partition plate is installed inside the lower tank, located between the filter screen and the drive unit; The dividing plate is set at an angle, and a discharge hole corresponding to the lowest point of the dividing plate is opened on the lower tank body.

[0015] Optional, also includes: The raw material conveying mechanism is located on the outside of the grinding tank and is connected to the grinding tank and the rotating grinding plate.

[0016] Optionally, the raw material conveying mechanism includes a screw conveyor; The feed end of the screw conveyor is fixedly equipped with a second mounting flange that is connected to the first mounting flange; The screw conveyor is equipped with a guide pipe extending into the grinding jar at the discharge end; The discharge end of the material guide pipe is located below the material guide plate.

[0017] A method for grinding and sieving food raw materials includes the following steps: Step 1: Start the drive unit and guide the food raw materials into the hopper via the conveyor, where they fall into the grinding tank. Step 2: The food ingredients are cut and broken by the high-speed rotating cutter. The broken food ingredients are thrown to the edge under the action of centrifugal force and fall into the lower grinding mechanism through the material drop space, so that the food ingredients can only fall into the grinding space of the vortex grinding plate. Step 3: When the second support rotates, it will drive the grinding plate to rotate, so that the grinding plate rotates in the grinding space of the vortex grinding plate and grinds the food raw materials. Step 4: The properly ground food ingredients are filtered through a filter screen and fall onto the dividing plate, where they are discharged through the discharge holes under the guidance of the inclined surface of the dividing plate. Step 5: The substandard food raw materials are pushed inward by the grinding plate, so that the substandard food raw materials enter the screw conveyor through the feed port and are guided back into the upper tank by the screw conveyor. Steps 2, 3, 4 and 5 are repeated.

[0018] The technical effects and advantages of this invention are as follows: This invention adopts a three-layer coaxial integrated structure of upper crushing + lower fine grinding + bottom screening, which highly integrates the processes that were originally scattered on multiple independent devices. There is no need to transfer food raw materials back and forth between different devices. The pre-processing of raw materials can be completed in the same sealed cavity, avoiding the transfer of food raw materials during the connection of multiple devices. A single power output can drive the upper crushing mechanism and the lower grinding mechanism to operate synchronously, simplifying the overall structure of the equipment.

[0019] In this invention, a vortex grinding plate and a radially sliding grinding plate work together to form a continuous, dynamically variable-gap vortex grinding trajectory. As the grinding trajectory extends, the grinding gap gradually narrows along the direction of the vortex's advance. As the food raw materials rotate synchronously with the grinding plate, they are progressively squeezed along the vortex trajectory, gradually achieving a finer finish. At the same time, the reset opening allows the grinding plate to spring back and reset after completing a grinding stroke, enabling the grinding plate to cycle continuously without any grinding interruptions, ensuring the continuity of the grinding process. During the reset, the grinding plate collides with the vortex grinding plate, causing the vortex grinding plate and the filter screen to vibrate, preventing the food raw materials from sticking to the vortex grinding plate and facilitating their fall off the filter screen.

[0020] This invention allows for different rotational speeds between the upper crushing mechanism and the lower grinding mechanism by setting an accelerator. This enables the upper crushing mechanism to perform high-speed impact crushing, while the lower grinding mechanism performs low-speed stable grinding. The high-speed rotating upper crushing teeth can instantly and effectively split and crush large pieces of hard raw materials, ensuring that large pieces of raw materials are fully crushed and preventing large particles from directly entering the grinding chamber. The lower grinding mechanism maintains a stable low rotational speed, which allows the food raw materials to be fully squeezed and ground in the grinding chamber, while avoiding excessive frictional heat generation during high-speed grinding, which could lead to the deactivation of heat-sensitive components in the food raw materials and the charring and sticking of the food raw materials.

[0021] The present invention, due to the vortex setting of the vortex grinding plate, can push the substandard coarse food raw materials screened in the screening stage into the interior of the discharge cylinder, and then transport them to the upper crushing mechanism for secondary processing through the screw conveyor, thereby improving the raw material utilization rate and the finished product qualification rate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the grinding tank of the present invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the lower grinding mechanism of the present invention; Figure 5 For the present invention Figure 4Enlarged schematic diagram of the structure at point B; Figure 6 This is a schematic diagram of the power output mechanism of the present invention; Figure 7 This is a schematic diagram of the vortex grinding plate structure of the present invention; Figure 8 This is a schematic diagram of the rotating grinding plate structure of the present invention.

[0023] In the diagram: 100, grinding jar; 110, upper jar body; 120, lower jar body; 130, hopper; 140, guide plate; 150, dividing plate; 160, discharge hole; 200. Power take-off mechanism; 210. Drive unit; 220. Output shaft; 230. Accelerator; 240. Support bracket one; 300. Upper crushing mechanism; 310. Rotary disc; 320. Cutter; 330. Material discharge space; 400. Lower grinding mechanism; 410. Vortex grinding plate; 411. Reset opening; 420. Rotary grinding plate; 421. Support two; 422. Grinding plate; 423. Guide slide; 424. Slider; 425. Compression spring; 430. Discharge cylinder; 431. Inlet; 432. Mounting flange one; 500. Filter screen; 600. Raw material conveying mechanism; 610. Screw conveyor; 620. Mounting flange 2; 630. Material guide pipe. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This invention provides, for example Figure 1-8 The food raw material grinding and screening device shown includes a grinding tank 100, a power output mechanism 200, an upper crushing mechanism 300 and a lower grinding mechanism 400. The power output mechanism 200 is installed inside the grinding tank 100 and can output rotational driving force synchronously to coaxially drive the upper crushing mechanism 300 and the lower grinding mechanism 400 to rotate synchronously at a suitable speed. There is no need to set up multiple independent drive components, which simplifies the power transmission structure of the device. The upper crushing mechanism 300 and the lower grinding mechanism 400 are both located inside the grinding tank 100, and the upper crushing mechanism 300 is located above the lower grinding mechanism 400. The two form a two-stage processing station connected vertically, and the food raw materials to be processed can complete the crushing and grinding processes from top to bottom by gravity. The bottom of the lower grinding mechanism 400 is equipped with a filter screen 500, which can screen the food raw materials after they have been processed by the lower grinding mechanism 400. Only qualified food raw materials with the particle size that meet the standard are allowed to pass through the filter screen 500 and be discharged downwards. Large food raw materials that do not meet the standard are trapped above the filter screen 500 and continue to participate in grinding. The lower grinding mechanism 400 includes a vortex grinding plate 410, a rotary grinding plate 420, and a discharge cylinder 430; The vortex grinding plate 410 is installed on top of the filter screen 500, and the central axes of the two are completely coincident, which can ensure that the falling food raw materials can fall evenly into the slide area of ​​the vortex grinding plate 410. The slide of the vortex grinding plate 410 is vortex-shaped and has multiple sections. Each section of the slide gradually narrows from the outer area of ​​the vortex grinding plate 410 to the central area, thereby gradually increasing the grinding and squeezing force on the food raw materials. Each section of the vortex grinding plate 410 slide has a reset opening 411 that penetrates the plate body at the starting end. The rotating grinding plate 420 includes a support 421 and multiple grinding plates 422; The second bracket 421 is fixedly installed on the power output mechanism 200 and rotates synchronously with the second bracket 421. The grinding plate 422 is slidably installed at the bottom of the second bracket 421. The bottom working surfaces of all grinding plates 422 are parallel and in contact with the slide working surfaces of the vortex grinding plate 410. When the second bracket 421 rotates under the drive of the power output mechanism 200, it can synchronously drive the multiple grinding plates 422 installed at the bottom to be inserted into the slides of the corresponding sections of the vortex grinding plate 410 and slide continuously along the vortex trajectory. During the sliding process, the contact working surfaces of the two plates will continuously squeeze, knead and shear the food raw materials falling into the gap of the slide, gradually grinding the large particles of raw materials into a fine state that meets the particle size requirements. The size of the grinding plate 422 is smaller than the size of the reset opening 411. When the grinding plate 422 slides along the vortex slide to the position corresponding to the reset opening 411 at the end of the slide, the grinding plate 422 can pass through the reset opening 411 under the drive of external force and slide to the first end of the corresponding section of the vortex grinding plate 410 slide. The reset of a single grinding stroke can be completed without reverse rotation, thereby realizing a cyclic continuous grinding operation. The discharge cylinder 430 is a hollow cylindrical structure. The discharge cylinder 430 is coaxially mounted on the filter screen 500. One end of the cylinder extends downward after passing through the filter screen 500 and finally passes through the outer wall of the grinding tank 100. This allows the coarse particles that are not fully ground to be directly discharged outside the grinding tank 100, preventing them from accumulating inside the tank and affecting the normal grinding and screening efficiency.

[0026] The device employs a three-layer coaxial integrated structure consisting of upper crushing, lower fine grinding, and bottom screening. This highly integrates the processes that were originally scattered across multiple independent devices, eliminating the need to transfer food raw materials between different devices. Raw material pretreatment can be completed within the same sealed cavity, avoiding the transfer of food raw materials during the connection of multiple devices. A single power output can drive the upper crushing mechanism 300 and the lower grinding mechanism 400 to operate synchronously, simplifying the overall structure of the equipment.

[0027] The vortex grinding plate 410 cooperates with the radially sliding grinding plate 422, and their relative motion forms a continuous dynamic variable gap vortex grinding trajectory. As the grinding trajectory extends, the grinding gap gradually narrows along the direction of the vortex's advance. As the food raw materials rotate synchronously with the grinding plate 422, they are continuously and progressively squeezed along the vortex trajectory, gradually completing the fine processing. At the same time, the reset opening 411 allows the grinding plate 422 to spring back and reset after completing a grinding stroke, realizing the continuous cycle of the grinding plate 422 without any grinding interruption points, fully ensuring the continuity of the grinding process. During the reset, it collides with the vortex grinding plate 410, causing the vortex grinding plate 410 and the filter screen 500 to vibrate, preventing the food raw materials from sticking to the vortex grinding plate 410 and facilitating the food raw materials to fall off the filter screen 500.

[0028] The lengths of the reset opening 411 and the grinding plate 422 gradually increase from the outside to the inside. The size of the reset opening 411 corresponding to each slide section is larger than the size of the grinding plate 422 working in that slide section, so that the grinding plate 422 can pass through for reset. Furthermore, the sizes of the reset opening 411 and the grinding plate 422 located in the inner slide section are larger than the sizes of the reset opening 411 and the grinding plate 422 located in the outer slide section, thereby preventing the inner grinding plate 422 from getting stuck in the outer reset opening 411.

[0029] The working principle of this embodiment is as follows: In use, food ingredients are introduced into the grinding tank 100, and the power output mechanism 200 is activated simultaneously, driving the upper crushing mechanism 300 and the second support 421 to rotate. The food ingredients, falling onto the power output mechanism 200, are cut and crushed by the high-speed rotating mechanism, and then fall onto the vortex grinding plate 410. As the second support 421 rotates, it drives the grinding plate 422 to slide along the vortex grinding plate 410, grinding the food ingredients during this process. Qualified food ingredients are filtered through the filter screen 500 and discharged, while those that do not meet specifications are pushed by the grinding plate 422 into the discharge cylinder 430 and discharged. When the grinding plate 422 rotates to the reset opening 411, it is pushed by the elastic structure to reset to the beginning position of the corresponding section of the vortex grinding plate 410 slide.

[0030] In some embodiments of the present invention, reference is made to... Figure 8 As shown, the rotating grinding plate 420 also includes a guide slide 423, a slider 424, and a compression spring 425; The guide slide 423 is located at the bottom of the bracket 421. The slide is a long strip-shaped groove structure that matches the shape of the slider 424. The groove opening is treated with anti-detachment limiting. The slider 424 is installed on the top of the grinding plate 422 and slides along the guide slide 423. It can be completely fitted inside the guide slide 423 and slide smoothly back and forth in the radial direction of the slide. The two ends of the compression spring 425 are connected to the inner end wall of the guide slide 423 and the slider 424 respectively. The compression spring 425 is always in a stored state and is always in a pre-compressed stored state throughout the entire running stroke of the device, which can continuously provide the slider 424 with an elastic thrust toward the outside of the guide slide 423.

[0031] In some embodiments of the present invention, reference is made to... Figure 7 As shown, the discharge cylinder 430 has an inlet 431 on its outer side. The inlet 431 is located above the filter screen 500 and corresponds to the rotary grinding plate 420, ensuring that coarse food raw materials that have not fully met the sieving particle size requirements after being fully ground by the rotary grinding plate 420 can be directly swept into the inlet 431 by the rotary grinding plate 420. The discharge end of the discharge cylinder 430 is located outside the grinding tank 100 and is fixedly installed with a mounting flange 432. Multiple sets of standard-sized connecting bolt holes are evenly opened on the flange.

[0032] In some embodiments of the present invention, reference is made to... Figure 2 and Figure 3 As shown, the upper crushing mechanism 300 includes a rotating disk 310 and a cutter 320; The rotating disk 310 is installed on the top of the power output mechanism 200 and rotates synchronously with the power output mechanism 200. An annular gap is reserved between the outer edge of the rotating disk 310 and the inner wall of the grinding tank 100. This gap forms a material drop space 330 that connects the upper crushing chamber and the lower grinding station. Multiple cutters 320 are provided, and all cutters 320 are arranged in a uniform ring array with the central axis of the rotating disk 310 as the reference. They are vertically fixed on the top end face of the rotating disk 310 and cut the food raw materials during the rotation of the rotating disk 310.

[0033] In some embodiments of the present invention, reference is made to... Figure 4 As shown, the power output mechanism 200 includes a drive device 210 and an output shaft 220. The drive device 210 is bolted to the inner bottom wall of the grinding tank 100. The drive device 210 can be a servo motor. The output shaft 220 is installed at the output end of the drive device 210. The shaft extends vertically upward along the axial direction of the grinding tank 100 and can output a stable rotational torque synchronously to drive the upper crushing mechanism 300 and the lower grinding mechanism 400 located at different heights on their shafts to rotate synchronously.

[0034] In some embodiments of the present invention, reference is made to... Figure 6 As shown, the output shaft 220 is provided with two sections. An accelerator 230 (which can be a gear speed increaser, planetary gear speed increaser, etc.) is installed between the two sections of the output shaft 220 to increase the speed of the upper section of the output shaft 220. A bracket 240 is installed on the outside of the accelerator 230 to contact the inner wall of the grinding jar 100. This bracket can provide circumferential limiting support for the housing of the accelerator 230, preventing the accelerator 230 from rotating synchronously with the shaft and ensuring the stability of the accelerator 230 during use.

[0035] The accelerator 230 allows for different rotational speeds between the upper crushing mechanism 300 and the lower grinding mechanism 400. This enables the upper crushing mechanism 300 to perform high-speed impact crushing while the lower grinding mechanism 400 performs low-speed stable grinding. The high-speed rotating upper crushing teeth can instantly and effectively split and crush large pieces of hard raw materials, ensuring that large pieces are fully crushed and preventing large particles from directly entering the grinding chamber. The lower grinding mechanism 400 maintains a stable low rotational speed, which allows the food raw materials to be fully squeezed and ground in the grinding chamber, while also preventing excessive frictional heat generation during high-speed grinding, which could lead to the deactivation of heat-sensitive components and charring and adhesion of the food raw materials.

[0036] In some embodiments of the present invention, reference is made to... Figure 2 As shown, the grinding jar 100 includes an upper jar body 110 and a lower jar body 120 installed at the bottom of the upper jar body 110; The top of the upper tank 110 is fixedly equipped with a hopper 130 for introducing food raw materials to be processed. Inside the upper tank 110, there are two inclined guide plates 140. The two guide plates 140 can guide the raw materials falling from the hopper 130 to avoid the raw materials directly concentrating and falling onto the crushing components below. A dividing plate 150 is installed inside the lower tank 120. The dividing plate 150 is located between the filter screen 500 and the drive device 210. It can effectively prevent raw material debris and dust that may leak during the grinding process from entering the drive component area below, and avoid the power components from being corroded by food raw materials and getting stuck. The dividing plate 150 is inclined, and the lower tank 120 has a discharge hole 160 corresponding to the lowest point of the dividing plate 150. Food ingredients that fall above the dividing plate 150 can automatically slide down the inclined plate surface to the lowest point and finally be discharged from the tank smoothly through the discharge hole 160, thus avoiding the accumulation and deterioration of food ingredients on the surface of the dividing plate 150.

[0037] In some embodiments of the present invention, reference is made to... Figure 1 As shown, it also includes: The raw material conveying mechanism 600 is used to send materials that do not meet the grinding fineness requirements back to the grinding process. The raw material conveying mechanism 600 is arranged in the empty area outside the grinding tank 100 and does not occupy the crushing and grinding space inside the grinding tank 100. Its two ends are respectively sealed and connected to the upper feed side of the grinding tank 100 and the outer end of the discharge cylinder 430 extending from the side wall of the grinding tank 100. It can send the insufficiently ground coarse material discharged from the discharge cylinder 430 back into the grinding tank 100 to form a closed-loop circulating grinding circuit.

[0038] In some embodiments of the present invention, reference is made to... Figure 2 As shown, the raw material conveying mechanism 600 includes a screw conveyor 610 for achieving closed-loop raw material conveying, thereby preventing food raw materials from spilling during the conveying process; The feed end of the screw conveyor 610 is fixedly installed with a second mounting flange 620 that is connected to the first mounting flange 432. The two can be quickly connected and locked by a sealing gasket and fastening bolts, which can not only ensure the sealing performance of the connection position and prevent substandard particles from overflowing from the joint after grinding, but also facilitate the subsequent disassembly and cleaning of the conveying passage. The screw conveyor 610 is equipped with a guide pipe 630 extending into the grinding jar 100 at the discharge end. The guide pipe 630 is inclined downward. The return material that is lifted and conveyed by the screw conveyor 610 can be guided into the grinding jar 100 through the guide pipe 630 to avoid the material from being blocked at the end of the conveying path. The discharge end of the material guide pipe 630 is located below the material guide plate 140. The return material discharged from the material guide pipe 630 can fall directly into the working area of ​​the upper crushing mechanism 300 without passing through the guide path of the material guide plate 140, and can directly enter the secondary crushing process.

[0039] The vortex setting of the vortex grinding plate 410 can push the substandard coarse food raw materials screened out in the screening stage into the discharge cylinder 430, and then transport them to the upper crushing mechanism 300 for secondary processing through the screw conveyor 610, thereby improving the raw material utilization rate and the finished product qualification rate.

[0040] The working method of this invention: During grinding, start the drive device 210 (the drive device 210 can be a servo motor, drive motor or other drive equipment) so that the drive device 210 drives the rotating disk 310 and the support 421 to rotate through the output shaft 220.

[0041] Food ingredients are fed into the hopper 130 via a conveyor and fall onto the guide plate 140. Guided by the guide plate 140, they fall onto the rotating disk 310, where they are cut and broken by the high-speed rotating cutter 320. The broken food ingredients are thrown to the edge by centrifugal force and fall into the lower grinding mechanism 400 through the dropping space 330. Because the lower grinding mechanism 400 has an inclined slope on its outer side (the inclined slope contacts the outer surface of the vortex grinding plate 410), the food ingredients can only fall into the grinding space of the vortex grinding plate 410.

[0042] When the support 421 rotates, it will drive the grinding plate 422 to rotate, so that the grinding plate 422 rotates in the grinding space of the vortex grinding plate 410 and grinds the food raw materials. The qualified food raw materials are filtered through the filter screen 500 and fall onto the dividing plate 150, and are discharged through the discharge hole 160 under the guidance of the inclined surface of the dividing plate 150.

[0043] Substandard food raw materials move inward under the push of grinding plates 422, and are pushed to the center area by the alternation of multiple grinding plates 422. The center position is tilted downward, so that the substandard food raw materials are introduced into the interior of screw conveyor 610 through feed port 431. Driven by screw conveyor 610, they are guided back into the interior of upper tank 110 for further crushing and grinding.

[0044] When the support 421 rotates, it drives the grinding plate 422 to slide along the spiral grinding plate 410. Since the spiral grinding plate 410 is spirally arranged, it will move towards the center as the grinding plate 422 rotates, causing the grinding plate 422 to drive the slider 424 to slide along the guide slide 423 and squeeze the compression spring 425, increasing the storage force of the compression spring 425. When the grinding plate 422 is in contact with the corresponding reset opening 411, the stress of the compression spring 425 is released, and the grinding plate 422 returns to the initial position through the reset opening 411 under the push of the compression spring 425.

[0045] A method for grinding and sieving food raw materials includes the following steps: Step 1: Start the drive unit 210 and guide the food raw materials into the inside of the discharge hopper 130 through the conveyor, and drop them into the inside of the upper tank 110 through the discharge hopper 130; Step 2: The food ingredients are cut and broken by the high-speed rotating cutter 320. The broken food ingredients are thrown to the edge under the action of centrifugal force and fall into the lower grinding mechanism 400 through the material drop space 330, so that the food ingredients can only fall into the grinding space of the vortex grinding plate 410. Step 3: When the support 2 421 rotates, it will drive the grinding plate 422 to rotate, so that the grinding plate 422 rotates in the grinding space of the vortex grinding plate 410 and grinds the food raw materials. Step 4: The ground food raw materials are filtered through the filter screen 500 and fall onto the dividing plate 150, and are discharged through the discharge hole 160 under the guidance of the inclined surface of the dividing plate 150. Step 5: The substandard food raw materials are pushed inward by the grinding plate 422, so that the substandard food raw materials enter the screw conveyor 610 through the feed port 431. Driven by the screw conveyor 610, they are guided back into the upper tank 110. Steps 2, 3, 4 and 5 are repeated.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A food raw material grinding and sieving device, characterized in that, It includes a grinding tank, a power output mechanism, an upper crushing mechanism, and a lower grinding mechanism; The power output mechanism is installed inside the grinding tank and is used to drive the upper crushing mechanism and the lower grinding mechanism to rotate; Both the upper crushing mechanism and the lower grinding mechanism are located inside the grinding tank, with the upper crushing mechanism located above the lower grinding mechanism; A filter screen is installed at the bottom of the lower grinding mechanism; The lower grinding mechanism includes a vortex grinding plate, a rotary grinding plate, and a discharge cylinder; The vortex grinding plate is installed on top of the filter screen. The vortex grinding plate slide is vortex-shaped and has multiple sections. Each section of the vortex grinding plate slide has a reset opening at the beginning. The rotating grinding plate includes a support frame and multiple grinding plates; The second bracket is mounted on the power output mechanism, and the grinding plate is slidably mounted on the bottom of the second bracket; When the second support rotates, it drives multiple grinding plates to slide along the corresponding section of the vortex grinding plate slide, and grinds the food raw materials. When the grinding plate rotates to correspond to the reset opening, it slides through the reset opening to the first end of the vortex grinding plate slide. The discharge cylinder is coaxially mounted on the filter screen and extends to the outside of the grinding tank.

2. The food raw material grinding and sieving device according to claim 1, characterized in that: The rotary grinding plate also includes guide rails, sliders, and compression springs; The guide slide is located at the bottom of bracket two, and the slider is installed on the top of the grinding plate and slides along the guide slide; The two ends of the compression spring are connected to the inner end wall of the guide slide and the slider, respectively, and the compression spring is always in a charged state.

3. The food raw material grinding and sieving device according to claim 2, characterized in that: The discharge cylinder has an inlet on its outer side, which is located above the filter screen and corresponds to the rotating grinding plate. The discharge end of the discharge cylinder is located outside the grinding tank and is fixedly installed with a mounting flange.

4. The food raw material grinding and sieving device according to claim 1, characterized in that: The upper crushing mechanism includes a rotary disc and a cutter; The rotary disc is installed on top of the power output mechanism, and a material drop space is formed between the rotary disc and the grinding jar; Multiple cutters are mounted on top of the rotating disk in a circular array.

5. The food raw material grinding and sieving device according to claim 1, characterized in that: The power take-off mechanism includes a drive unit and an output shaft; The drive unit is installed on the inner bottom wall of the grinding tank, and the output shaft is installed at the output end of the drive unit and is used to drive the upper crushing mechanism and the lower grinding mechanism to rotate.

6. The food raw material grinding and sieving device according to claim 5, characterized in that: The output shaft is configured with two sections, and an accelerator is installed between the two sections. A bracket is installed on the outside of the accelerator to contact the inner wall of the grinding jar.

7. The food raw material grinding and sieving device according to claim 5, characterized in that: The grinding jar includes an upper jar body and a lower jar body installed at the bottom of the upper jar body; A material hopper is installed on the top of the upper tank, and two inclined guide plates are installed inside the upper tank. A partition plate is installed inside the lower tank, located between the filter screen and the drive unit; The dividing plate is set at an angle, and a discharge hole corresponding to the lowest point of the dividing plate is opened on the lower tank body.

8. The food raw material grinding and sieving device according to claim 3, characterized in that: Also includes: The raw material conveying mechanism is located on the outside of the grinding tank and is connected to the grinding tank and the rotating grinding plate.

9. A food raw material grinding and sieving device according to claim 8, characterized in that: The raw material conveying mechanism includes a screw conveyor; The feed end of the screw conveyor is fixedly equipped with a second mounting flange that is connected to the first mounting flange; The screw conveyor is equipped with a guide pipe extending into the grinding jar at the discharge end; The discharge end of the material guide pipe is located below the material guide plate.

10. A method for grinding and sieving food raw materials, characterized in that: Includes the following steps: Step 1: Start the drive unit and guide the food raw materials into the hopper via the conveyor, where they fall into the grinding tank. Step 2: The food ingredients are cut and broken by the high-speed rotating cutter. The broken food ingredients are thrown to the edge under the action of centrifugal force and fall into the lower grinding mechanism through the material drop space, so that the food ingredients can only fall into the grinding space of the vortex grinding plate. Step 3: When the second support rotates, it will drive the grinding plate to rotate, so that the grinding plate rotates in the grinding space of the vortex grinding plate and grinds the food raw materials. Step 4: The properly ground food ingredients are filtered through a filter screen and fall onto the dividing plate, where they are discharged through the discharge holes under the guidance of the inclined surface of the dividing plate. Step 5: The substandard food raw materials are pushed inward by the grinding plate, so that the substandard food raw materials enter the screw conveyor through the feed port and are guided back into the upper tank by the screw conveyor. Steps 2, 3, 4 and 5 are repeated.

Images