Efficient fruit and vegetable powder preparation system integrating multi-stage cyclone classification and superfine grinding

Abstract

The invention provides an efficient fruit and vegetable powder preparation system integrating multi-stage cyclone classification and superfine grinding, belongs to the technical field of food processing, and aims to solve the problems of low classification precision, high energy consumption, large nutrient loss and insufficient material adaptability in the prior art. The system comprises a crushing and grading box and a crushing and grading system, a primary grinding cavity and a superfine grinding cavity are formed in the crushing and grading box and communicate with each other through a conical communicating channel, and automatic circulation of particles which do not reach the standard is achieved in cooperation with a backflow channel and an inclined face. The crushing and grading system comprises a multi-stage grading wheel driven by a high-efficiency motor, a grinding disc and wear-resistant grinding teeth, and seamless connection of primary grinding and superfine crushing is realized in combination with high-speed airflow generated by a supersonic nozzle. The grinding discs are connected through low-friction ceramic balls, so that energy consumption and abrasion are reduced; and the durability of the equipment is enhanced by the detachable grinding block and the wear-resistant ceramic coating.

Description

Technical Field

[0001] The present invention relates to the technical field of food processing, in particular to a high-efficiency fruit and vegetable powder preparation system integrating multi-stage cyclone classification and ultrafine grinding. Background Art

[0002] As an important food raw material, fruit and vegetable powder is widely used in food processing, nutritional supplements, functional foods and other fields. The requirements for powder particle size, uniformity, nutrient retention rate and production efficiency in its preparation process are increasing. Traditional methods for preparing fruit and vegetable powders mainly include mechanical crushing, spray drying and freeze drying, but these methods have some limitations. For example, mechanical crushing is usually difficult to achieve ultra-micro particle size (usually refers to a particle size less than 10μm), and it is easy to cause the material to lose nutrients due to heating; although spray drying can produce fine particles, it has high energy consumption and poor retention of heat-sensitive components; although freeze drying can better retain nutrients, it requires large equipment investment and low production efficiency, which is difficult to meet the needs of large-scale industrial production.

[0003] In recent years, in order to improve the quality and production efficiency of fruit and vegetable powders, researchers have tried to introduce cyclone classification technology and ultrafine grinding technology. Cyclone classification technology uses airflow to screen the particle size of powders, which can effectively separate particles of different sizes and improve the uniformity of powders. However, traditional cyclone classification devices usually only use single-stage classification, which is difficult to meet the demand for high-precision classification of ultrafine powders, resulting in a wide particle size distribution of the product, affecting its application effect. On the other hand, ultrafine grinding technology can grind materials to micron or even nanometer levels through high-speed airflow or mechanical shearing, but in actual applications, ultrafine grinding equipment often faces problems such as high energy consumption, severe equipment wear, and low classification efficiency. In addition, in the existing technology, the crushing and classification processes are often carried out step by step, lacking an integrated design, resulting in complex production processes, large equipment footprint, and high overall energy consumption. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the technical problem to be solved by the present invention is the problems of low classification accuracy, high energy consumption, large nutrient loss and insufficient adaptability to different materials in the existing fruit and vegetable powder preparation system.

[0007] To solve the above technical problems, the present invention provides the following technical solution: an efficient preparation system for fruit and vegetable powders integrating multi-stage cyclone classification and ultrafine grinding, comprising a grinding and grading box and a grinding and grading system arranged inside the grinding and grading box, wherein a first grinding and grading chamber is provided at the top of the grinding and grading box, a second grinding and grading chamber is provided at the bottom of the grinding and grading box, a first connecting channel is provided at the bottom of the first grinding and grading chamber, and the bottom end of the first connecting channel is connected to the second grinding and grading chamber;

[0008] The crushing and grading system includes a grading motor fixedly mounted on the top wall of the crushing and grading box, the output end of the grading motor is connected to a drive shaft through a coupling, the bottom end of the drive shaft extends into the first crushing and grading chamber and is fixedly connected to a first grading wheel, and the bottom end of the drive shaft also extends into the second crushing and grading chamber and is fixedly connected to a second grading wheel and a grinding disc, a plurality of grinding teeth are installed in a circumferential array on the inner wall of the bottom of the second crushing and grading chamber, and the grinding disc is rotatably connected to the inner side of the plurality of grinding teeth.

[0009] As a preferred solution of the efficient preparation system for fruit and vegetable powders integrating multi-stage cyclone classification and ultrafine grinding of the present invention, a feed port is opened on the left side of the bottom end of the second grinding and classification chamber, and the input end of the feed port is connected to a feed channel.

[0010] As a preferred solution of the efficient preparation system for fruit and vegetable powders integrating multi-stage cyclone classification and ultrafine grinding of the present invention, a discharge port is provided on the right side of the top of the first grinding and classification chamber.

[0011] As a preferred solution of the efficient preparation system for fruit and vegetable powders integrating multi-stage cyclone classification and ultrafine grinding according to the present invention, the inner bottom wall of the first grinding and classification chamber is provided with a downwardly inclined slope, and a reflux groove is provided at the bottom end of the slope, and a reflux channel is connected to the bottom end of the reflux groove, and the output end of the reflux channel is connected to the bottom of the second grinding and classification chamber.

[0012] As a preferred solution of the efficient preparation system for fruit and vegetable powders integrating multi-stage cyclone classification and ultrafine grinding according to the present invention, the grinding and classification system further includes four supersonic nozzles installed in a circular array on the outer surface of the grinding and classification box, the output ends of the four supersonic nozzles are all arranged inside the first grinding and classification chamber, and the input ends of the four supersonic nozzles are all arranged outside the grinding and classification box.

[0013] As a preferred solution of the efficient preparation system for fruit and vegetable powders integrating multi-stage cyclone classification and ultrafine grinding according to the present invention, a plurality of grinding blocks are installed in a circular array on the outer surface of the grinding disc, and the outer walls of the plurality of grinding blocks are arranged adjacent to the inner walls of the grinding teeth without affecting the normal rotation of the plurality of grinding blocks.

[0014] As a preferred solution of the efficient preparation system for fruit and vegetable powders integrating multi-stage cyclone classification and ultrafine grinding of the present invention, a ball bearing is provided at the connection between the bottom of the grinding disc and the bottom wall of the second grinding and classification chamber, and the grinding disc is rotatably connected to the inner bottom wall of the second grinding and classification chamber through the ball bearing.

[0015] Beneficial Effects of the Invention: The present invention provides an efficient fruit and vegetable powder preparation system that integrates multi-stage cyclonic classification and ultrafine grinding. Through the coordinated operation of the primary grinding chamber and ultrafine grinding chamber, the precise coordination of high-speed airflow nozzles with multi-stage grading wheels, and the circulation design of the return channel and inclined ramps, this system significantly improves classification accuracy, grinding efficiency, and production continuity, while reducing nutrient loss and energy consumption. The system utilizes a wear-resistant ceramic coating, removable grinding blocks, and low-friction ceramic balls, enhancing its durability and adaptability. Suitable for processing a variety of fruit and vegetable materials, it offers a compact structure and low maintenance costs, providing an efficient, energy-saving, and environmentally friendly solution for the large-scale production of high-quality fruit and vegetable powders. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0017] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 It is a three-dimensional front cross-sectional view of the present invention;

[0019] Figure 3 It is a three-dimensional top sectional view of the present invention;

[0020] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at point A. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0024] Example

[0025] Reference Figures 1 to 4 The present invention provides an efficient preparation system for fruit and vegetable powders that integrates multi-stage cyclone classification and ultrafine grinding. It aims to achieve high-precision classification, low-energy consumption grinding and highly adaptable preparation of different fruit and vegetable materials by optimizing the mechanical structure and process flow, and solve the problems of low classification accuracy, high energy consumption, large nutritional loss and insufficient material adaptability in the existing technology.

[0026] Specifically, the system includes a crushing and grading box 100 and a crushing and grading system 200. The crushing and grading box 100, as the core bearing structure of the system, is made of high-strength stainless steel material, has excellent corrosion resistance and wear resistance, is suitable for processing acidic or high-fiber fruit and vegetable materials, and ensures long-term operational stability. A first crushing and grading chamber 101 is provided at the top of the crushing and grading box 100. The first crushing and grading chamber 101 is mainly used for ultrafine crushing and final airflow classification. Its spacious cavity space can accommodate the violent movement of high-speed airflow and particles, and crushes the material to the micron level through the shearing and collision of high-speed airflow, while providing sufficient space for subsequent classification. A second crushing and grading chamber 102 is provided at the bottom of the crushing and grading box 100. The second crushing and grading chamber 102 is responsible for the initial crushing and grinding of the material. Its smaller cavity design enhances the contact efficiency between the material and the grinding parts, and can effectively crush larger particles or high-fiber materials, laying the foundation for subsequent ultrafine crushing. A first connecting passage 103 is formed at the bottom of the first crushing and classifying chamber 101, and the bottom end of the first connecting passage 103 is connected to the second crushing and classifying chamber 102. The first connecting passage 103 adopts a conical design, which optimizes the flow of air and particles, reduces the risk of material accumulation and blockage in the passage, and ensures that particles can smoothly enter the first crushing and classifying chamber 101 from the second crushing and classifying chamber 102 for further processing.

[0027] The crushing and grading system 200 is the core component for realizing the crushing and grading functions, and includes a grading motor 201 fixedly mounted on the inner top wall of the crushing and grading box 100. The grading motor 201 adopts a high-efficiency and energy-saving motor to provide stable power output, and its output end is connected to the drive shaft 202 through a coupling transmission. The drive shaft 202 is made of high-strength alloy steel, and its surface is precisely machined to ensure stability and durability at high speeds. Its bottom end extends to the first crushing and grading chamber 101 and is fixedly connected to the first grading wheel 203. The first grading wheel 203 adopts a multi-blade structure, and the blade angle has been optimized through fluid mechanics, which can generate strong centrifugal force and airflow traction, sucking in fine particles that meet the particle size requirements after ultra-fine grinding and guiding them to the discharge port 106, while throwing the coarser particles that do not meet the standards to the cavity wall to improve the grading accuracy.

[0028] The bottom end of the drive shaft 202 also extends into the second crushing and grading chamber 102, where a second grading wheel 204 and a grinding disc 205 are fixedly connected. The second grading wheel 204 is located in the upper part of the second crushing and grading chamber 102. Its blades are denser than those of the first grading wheel 203. It is specially designed for secondary classification of particles after initial crushing. The upward attraction generated by rotation pulls the particles to the first connecting channel 103, ensuring that the particles entering the first crushing and grading chamber 101 have a more uniform particle size distribution. The grinding disc 205 is located at the bottom of the second crushing and grading chamber 102. The surface is covered with a wear-resistant ceramic coating, which can withstand long-term grinding of high-fiber or sticky fruit and vegetable materials and extend its service life. A plurality of grinding teeth 206 are installed in a circular array on the inner wall of the bottom of the second crushing and grading chamber 102. The grinding teeth 206 are made of cemented carbide and have micro-textures engraved on the surface to increase friction with the material. They cooperate with the grinding disc 205 to form an efficient primary grinding area, which initially crushes the material through mechanical shearing and friction. The grinding disc 205 is rotatably connected to the inner side of the plurality of grinding teeth 206 , and the shear force generated by its high-speed rotation can effectively cope with fruit and vegetable materials of different hardness and fiber content.

[0029] A feed port 104 is provided on the left side of the bottom end of the second crushing and grading chamber 102. The input end of feed port 104 is connected to a feed channel 105. Feed channel 105 adopts an inclined design and is equipped with an anti-clogging vibration device inside. This allows for uniform and continuous delivery of fruit and vegetable materials into the second crushing and grading chamber 102, preventing a decrease in grinding efficiency due to material accumulation or intermittent feeding. Feed port 104 is located above the grinding disc 205, ensuring that the material falls directly into the grinding area between the grinding disc 205 and the grinding teeth 206, thereby improving the efficiency of the initial crushing. A discharge port 106 is provided on the right side of the top end of the first crushing and grading chamber 101. Discharge port 106 is connected to an external collection device and is equipped with a high-precision filter to prevent the discharge of oversized particles, ensuring that the output fruit and vegetable powder particle size meets high-quality requirements. Discharge port 106 is located near the first grading wheel 203, facilitating the rapid discharge of fine particles under the action of centrifugal force, reducing the residence time of the powder within the chamber, thereby reducing the damage to nutrients caused by heat generated by friction or airflow.

[0030] The inner bottom wall of the first crushing and grading chamber 101 is formed into a downwardly sloping surface S. The surface S is made of polished stainless steel with a smooth surface to reduce particle adhesion. The angle of inclination is precisely calculated to guide the coarser particles that are not sucked into the first grading wheel 203 to slide smoothly to the lower end. A reflux groove 107 is provided at the bottom end of the reflux groove 107. The bottom end of the reflux groove 107 is connected to a reflux channel 108, and the output end of the reflux channel 108 is connected to the bottom of the second crushing and grading chamber 102. The reflux groove 107 and the reflux channel 108 constitute an efficient material circulation system. The reflux channel 108 is provided with a spiral guide plate inside, which can guide the incompletely crushed particles to return to the second crushing and grading chamber 102 in an orderly manner, avoiding blockage and improving circulation efficiency.

[0031] The pulverizing and classifying system 200 also includes four supersonic nozzles 207 installed in a circumferential array on the outer surface of the pulverizing and classifying box 100. The output ends of the four supersonic nozzles 207 are all arranged inside the first pulverizing and classifying chamber 101, and the input ends of the four supersonic nozzles 207 are all arranged outside the pulverizing and classifying box 100. The supersonic nozzles can generate high-speed airflows of up to Mach 2, which are sprayed into the first pulverizing and classifying chamber 101 to form strong turbulence and shear force, and efficiently pulverize the particles with airflow, so that the materials reach the ultra-fine level under the action of collision and shear, while assisting the airflow traction effect of the first classifying wheel 203 to enhance the separation efficiency of fine particles. The circumferential array layout of the nozzles ensures uniform airflow distribution and avoids the reduction of classification efficiency caused by local eddies.

[0032] Multiple grinding blocks 208 are mounted in a circular array on the outer surface of the grinding disc 205. These blocks 208 are removable for easy replacement and maintenance. Their outer walls are flush against the inner walls of the grinding teeth 206, ensuring smooth rotation. The blocks 208 are engraved with interlaced grinding patterns, creating a multi-dimensional shear and friction effect with the teeth 206 during high-speed rotation, significantly improving the initial grinding of high-fiber or sticky fruit and vegetable materials.

[0033] Ball bearings 209 are installed at the junction between the bottom of the grinding disc 205 and the inner bottom wall of the second crushing and classifying chamber 102. These high-precision ceramic balls offer low friction and high-temperature resistance. The grinding disc 205 is rotatably connected to the inner bottom wall of the second crushing and classifying chamber 102 via the balls 209. These bearings effectively reduce the rotational resistance of the grinding disc 205, improving the smoothness and energy efficiency of the initial grinding process while also reducing mechanical wear and extending the life of the equipment.

[0034] Working Principle: After fruit and vegetable powder enters through the feed channel 105, it can fall into the gap formed by the grinding disc 205 and the multiple grinding teeth 206 through the feed port 104. When the grinding disc 205 drives the grinding block 208 to rotate, it can grind and crush the powder under the combined forces of friction and shear, completing the initial crushing. The crushed powder can enter the first crushing and grading chamber 101 through the first connecting channel 103 due to the upward attraction generated by the rotation of the second classifying wheel 204. High-speed airflow enters the first crushing and grading chamber 101 through the supersonic nozzle 207, thereby crushing and shearing the entering powder, thereby achieving ultra-fine crushing. The crushed powder can be introduced into the discharge port 106 to enter the next process under the rotation of the first classifying wheel 203, while the particles that are not completely crushed will fall onto the inclined surface S under the action of gravity, then slide into the reflux groove 107, and enter the second crushing and classifying chamber 102 again through the reflux channel 108 to be crushed and classified again until the required particle size is reached.

[0035] This embodiment achieves efficient and continuous preparation of fruit and vegetable powders by combining the ultrafine grinding of the first crushing and grading chamber 101 with the initial grinding of the second crushing and grading chamber 102, in conjunction with the circulation design of the reflux channel 108 and the inclined surface S. The multi-stage grading mechanism of the first grading wheel 203 and the second grading wheel 204 significantly improves the particle size screening accuracy. The high-speed airflow of the supersonic nozzle 207 ensures the ultrafine grinding effect. The precise fit between the grinding disc 205 and the grinding teeth 206 and the low-friction design of the ball 209 reduce energy consumption and mechanical wear. The system has good adaptability to different fruit and vegetable materials (such as high-fiber leafy vegetables or high-sugar fruits). The optimized design of the reflux channel 108 and the inclined surface S ensures the efficient circulation of substandard particles and reduces the heat loss of nutrients. It is suitable for large-scale, high-quality continuous production of fruit and vegetable powders.

[0036] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structures. Other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0037] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0038] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An efficient fruit and vegetable powder preparation system integrating multi-stage cyclone classification and ultrafine grinding, characterized by: include, A crushing and grading box (100), wherein a first crushing and grading chamber (101) is provided at the top of the crushing and grading box (100), a second crushing and grading chamber (102) is provided at the bottom of the crushing and grading box (100), a first connecting passage (103) is provided at the bottom of the first crushing and grading chamber (101), and the bottom end of the first connecting passage (103) is connected to the second crushing and grading chamber (102); and The crushing and classifying system (200) comprises a classifying motor (201) fixedly mounted on the top wall of the crushing and classifying box (100); the output end of the classifying motor (201) is connected to a drive shaft (202) via a coupling; the bottom end of the drive shaft (202) extends into the first crushing and classifying chamber (101) and is fixedly connected to a first classifying wheel (203); the bottom end of the drive shaft (202) further extends into the second crushing and classifying chamber (102) and is fixedly connected to a second classifying wheel (204) and a grinding disc (205); a plurality of grinding teeth (206) are mounted in a circumferential array on the inner wall of the bottom of the second crushing and classifying chamber (102), and the grinding disc (205) is rotatably connected to the inner side of the plurality of grinding teeth (206).

2. The efficient fruit and vegetable powder preparation system integrating multi-stage cyclone classification and ultrafine grinding as claimed in claim 1 is characterized in that: A feed port (104) is provided on the left side of the bottom end of the second crushing and classifying chamber (102), and an input end of the feed port (104) is connected to a feed channel (105).

3. The efficient fruit and vegetable powder preparation system integrating multi-stage cyclone classification and ultrafine grinding as claimed in claim 2 is characterized by: A discharge port (106) is provided on the right side of the top end of the first crushing and classifying chamber (101).

4. The efficient fruit and vegetable powder preparation system integrating multi-stage cyclone classification and ultrafine grinding as claimed in claim 3 is characterized by: The inner bottom wall of the first crushing and classifying chamber (101) is provided with a downwardly inclined slope (S), and a reflux groove (107) is provided at the bottom end of the reflux groove (107), and the bottom end of the reflux groove (107) is connected to a reflux channel (108), and the output end of the reflux channel (108) is connected to the bottom of the second crushing and classifying chamber (102).

5. The efficient fruit and vegetable powder preparation system integrating multi-stage cyclone classification and ultrafine grinding as claimed in claim 4 is characterized in that: The pulverizing and classifying system (200) further comprises four supersonic nozzles (207) mounted in a circumferential array on the outer surface of the pulverizing and classifying box (100), wherein the output ends of the four supersonic nozzles (207) are all arranged inside the first pulverizing and classifying chamber (101), and the input ends of the four supersonic nozzles (207) are all arranged outside the pulverizing and classifying box (100).

6. The efficient fruit and vegetable powder preparation system integrating multi-stage cyclone classification and ultrafine grinding as claimed in claim 5 is characterized by: A plurality of grinding blocks (208) are installed in a circumferential array on the outer surface of the grinding disc (205), and the outer walls of the plurality of grinding blocks (208) are arranged adjacent to the inner walls of the grinding teeth (206) without affecting the normal rotation of the plurality of grinding blocks (208).

7. The efficient fruit and vegetable powder preparation system integrating multi-stage cyclone classification and ultrafine grinding as claimed in claim 6, characterized in that: A ball bearing (209) is provided at the connection between the bottom of the grinding disc (205) and the inner bottom wall of the second crushing and classifying chamber (102), and the grinding disc (205) is rotatably connected to the inner bottom wall of the second crushing and classifying chamber (102) via the ball bearing (209).

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