Crushing device for cereal processing

Abstract

The invention discloses a crushing device for cereal processing. The crushing device comprises a first crushing part, a second crushing part and a third crushing part which are sequentially arranged from top to bottom. A driving shaft driven by a driving motor is arranged in the first crushing part, and low-speed tool bits are arrayed on the shaft and used for primarily crushing materials. A transmission cavity and discharging channels on the two sides are arranged in the second smashing part, and power transmission and speed increase are achieved in the cavity through a gear set. And a high-speed shaft and a high-speed tool bit which are driven by a gear set in a speed increasing manner are arranged in the third crushing part and are used for finely crushing materials. According to the invention, a multi-stage progressive crushing mode of first low speed and second high speed is adopted, the crushing uniformity is effectively improved, and through the combination of a shunting heat dissipation path and low-speed initial crushing, the temperature rise in the crushing process is obviously reduced, the damage of nutritional ingredients and the caking of powder are avoided, and the product quality is better maintained. The device is compact in structure, low in energy consumption and convenient to operate and maintain, and two-stage crushing can be achieved only through a single driving motor.

Description

Technical Field

[0001] This invention relates to the field of food processing, and in particular to a pulverizing device for processing grains. Background Technology

[0002] Grains are widely used in the food processing industry. During processing, they usually need to be pulverized into powder by a pulverizing device to facilitate subsequent steaming, brewing, or further processing. Currently, most existing grain pulverizing devices use high-speed rotating blades, hammers, or grinding discs to pulverize materials. Their structure typically includes a feed hopper, a pulverizing chamber, pulverizing components, and a discharge screening structure.

[0003] However, the aforementioned existing technologies still have the following shortcomings in practical use: On the one hand, most existing crushing devices adopt a single crushing method, in which the material is directly subjected to high-speed crushing after entering the crushing chamber. The grains with different particle sizes, hardness and physical properties are not graded, which can easily lead to some materials being over-crushed while others are under-crushed, thus affecting the particle size uniformity and processing quality of the finished powder.

[0004] On the other hand, since the crushing process usually relies on high-speed rotating parts to continuously impact and rub the material, the crushing chamber is prone to high temperature rise. Especially when operating continuously or processing oily grains, the heat generated during the crushing process is difficult to dissipate in time, which can easily cause the material temperature to rise, leading to problems such as powder clumping, oil precipitation, and heat damage to some nutrients, thus affecting the flavor and quality of the grain powder. Summary of the Invention

[0005] One object of the present invention is to provide a pulverizing device for processing grains and cereals that at least solves any of the above-mentioned technical problems.

[0006] A further objective of this invention is to avoid the generation of high temperatures within the grinding chamber.

[0007] Another further objective of this invention is to improve the flavor and quality of whole grain powder.

[0008] In particular, the present invention provides a pulverizing device for processing grains, comprising a first pulverizing section, a second pulverizing section and a third pulverizing section, wherein the first pulverizing section, the second pulverizing section and the third pulverizing section are arranged sequentially from top to bottom; The first crushing section has a drive shaft, one end of which is connected to a drive motor, and the other end of which passes through the second crushing section. The drive shaft is provided with an axially arrayed low-speed cutter head. The second crushing section is provided with a transmission chamber, and feeding channels are provided on both sides of the transmission chamber; The third crushing section is connected to the first crushing section through the feeding channel, and the third crushing section has a high-speed shaft. One end of the high-speed shaft passes through the driving cavity, and the other end of the high-speed shaft is provided with a high-speed cutter head.

[0009] Furthermore, the second crushing section also includes: The first gear is fixedly connected to the extension end of the drive shaft; A drive shaft is disposed on one side of the first gear, and a second gear is disposed at one end of the drive shaft close to the first gear, and a third gear is disposed at the other end away from the drive shaft, wherein the first gear and the second gear mesh. The fourth gear is fixedly connected to the extension end of the high-speed shaft, and the fourth gear meshes with the third gear.

[0010] Furthermore, the diameter of the first gear is larger than that of the second gear, the diameter of the second gear is smaller than that of the third gear, and the diameter of the third gear is larger than that of the fourth gear.

[0011] Furthermore, the bottom of the third crushing section is provided with a pull-out collection drawer.

[0012] Furthermore, a baffle is provided between the first crushing section and the second crushing section.

[0013] Furthermore, a fixed housing is provided on the outside of the drive shaft, a push rod is provided on one side of the fixed housing, and a spring is provided on the other side of the fixed housing to push the fixed housing to move along the direction of the push rod.

[0014] Furthermore, the lower part of the baffle is provided with a first guide plate and a second guide plate, with the first guide plate inclined toward the second guide plate.

[0015] Furthermore, the second guide plate is provided with a filter screen.

[0016] The technical effects and advantages of this invention are as follows: This invention involves pouring material into the first crushing section, starting the drive motor, and having the drive shaft of the motor rotate the low-speed cutter head to initially crush the material, thereby reducing the overall particle size and initial impact heat. After crushing, the material is fed through the feeding channel into the third crushing section for fine crushing. In the third crushing section, a high-speed shaft drives a high-speed cutter head to crush large pieces of material. This multi-stage crushing method can adapt to grains with different hardness and particle size, avoiding over-crushing or uneven crushing caused by single high-speed crushing, and effectively improving the particle size uniformity and processing quality of the finished powder.

[0017] This invention achieves a speed-increasing effect by utilizing the ratio of gears of different diameters from the first to the fourth gear. While ensuring stable power transmission, it eliminates the need for an additional high-speed drive motor, simplifying the structure and reducing energy consumption. The device also features a pull-out collection drawer for easy powder collection and cleaning, improving ease of use.

[0018] This invention connects the first and third pulverizing sections through the feeding channels on both sides of the transmission cavity, forming a diversion heat dissipation path. Combined with the low-speed crushing of the first pulverizing section to reduce heat generation, it can significantly reduce the temperature rise in the pulverizing cavity and avoid problems such as powder clumping, oil precipitation, and nutrient destruction caused by excessive temperature during continuous operation or processing of oily grains, thereby better maintaining the flavor and quality of the grain powder. Attached Figure Description

[0019] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a front view structural diagram of the present invention.

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.

[0022] Figure 4 For the present invention Figure 3 A magnified schematic diagram of part B.

[0023] Figure 5 This is a schematic diagram of the third embodiment of the present invention.

[0024] In the diagram: 1. Drive motor; 101. Drive shaft; 102. Low-speed cutter head; 2. First crushing section; 3. Second crushing section; 301. Feeding channel; 302. Transmission chamber; 303. First gear; 304. Transmission shaft; 305. Second gear; 306. Third gear; 307. Fixed shell; 308. Push rod; 309. Fourth gear; 310. Spring; 4. Third crushing section; 401. High-speed shaft; 402. High-speed cutter head; 5. Baffle; 6. Collection drawer; 7. Fixing frame; 801. Second guide plate; 802. First guide plate; 803. Discharge chamber. Detailed Implementation

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 This is a front view structural diagram of the present invention. Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure along the AA direction. Figure 4 For the present invention Figure 3 A magnified schematic diagram of part B. Figure 5 This is a schematic diagram of the structure of the third embodiment of the present invention.

[0027] This embodiment provides a grain processing crushing device, including a first crushing section 2, a second crushing section 3, and a third crushing section 4 arranged sequentially from top to bottom. The first crushing section 2 has a feed inlet at its top, and a drive shaft 101 is installed inside it. The upper end of the drive shaft 101 is connected to a drive motor 1, and the lower end passes through the second crushing section 3. Multiple sets of low-speed cutters 102 are evenly arrayed along the axial direction on the drive shaft 101 for preliminary crushing of the fed grains. At the same time, a fixing frame 7 is provided on the outside of the crushing device for support.

[0028] It should be further explained that the first crushing section 2 has a drive shaft 101, one end of which is connected to the drive motor 1, and the other end of which passes through the second crushing section 3. The drive shaft 101 is equipped with an axially arrayed low-speed cutter head 102. The second crushing section 3 has a transmission cavity 302, and feeding channels 301 are provided on both sides of the transmission cavity 302. The third crushing section 4 communicates with the first crushing section 2 through the feeding channels 301. The third crushing section 4 has a high-speed shaft 401, one end of which passes through the drive cavity, and the other end of which is equipped with a high-speed cutter head 402. Specifically, the first crushing section 2 is located at the top of the device, and a feed inlet is provided on one side of its top for feeding in grains and cereals to be processed, such as soybeans, mung beans, oats, and brown rice. A vertical drive shaft 1 is coaxially arranged inside the first crushing section 2. 01; The upper end of the drive shaft 101 is connected to the output shaft of the drive motor 1 fixed to the top of the device via a coupling or directly, and the drive motor 1 provides rotational power; the lower end of the drive shaft 101 extends downward, passes through the bottom plate of the first crushing section 2, and enters the transmission cavity 302 of the second crushing section 3; the portion of the drive shaft 101 located in the cavity of the first crushing section 2 has multiple sets of low-speed cutter heads 102 evenly arrayed along its axial direction at a certain interval; these low-speed cutter heads 102 can be in the form of blades, hammers, etc., and their number, shape, and installation angle can be set according to the characteristics of the material to be crushed; in this embodiment, the low-speed cutter head 102 is preferably an obtuse-angled blade with a certain inclination angle, and its rotational linear speed is controlled in the range of 15-30 m / s, which belongs to the low-speed crushing category; after the drive motor 1 is started, it drives the drive shaft 101 and the low-speed cutter head 102 at a relatively low speed, for example, 200-500 Rotating at rpm; when the material is fed from the inlet, it is first subjected to the impact, shearing and collision of these low-speed rotating cutters for preliminary crushing; the main purpose of this process is to break up larger particle clumps and crush them into medium-sized particles, and to avoid generating a lot of heat due to excessive initial impact velocity; after preliminary crushing, the material moves downward under the action of gravity and the airflow generated by the rotation of the cutters.

[0029] At the bottom outlet of the first crushing section 2, a baffle 5 is installed. The baffle 5 is arranged horizontally or slightly inclined, serving to block and guide the material. The main function of the baffle 5 is to regulate the flow rate and path of the material entering the next crushing area from the first crushing section 2, preventing the material from falling directly in large quantities without sufficient preliminary crushing.

[0030] It should be further explained that the second crushing unit 3 also includes: a first gear 303, a transmission shaft 304, and a fourth gear 309. The first gear 303 is fixedly connected to the extension end of the drive shaft 101. The transmission shaft 304 is disposed on one side of the first gear 303, and a second gear 305 is disposed at one end of the transmission shaft 304 near the first gear 303, and a third gear 306 is disposed at the other end away from the transmission shaft 304. The first gear 303 and the second gear 305 mesh. The fourth gear 309 is fixedly connected to the extension end of the high-speed shaft 401, and the fourth gear 309 meshes with the third gear 306. Gear 306 meshes; specifically, the second crushing part 3 is located between the first crushing part 2 and the third crushing part 4. The interior of the second crushing part 3 is mainly divided into two functional areas: the transmission cavity 302 located in the middle, and the feeding channel 301 symmetrically distributed on the left and right sides (or front and rear sides) of the transmission cavity 302; the transmission cavity 302 is a relatively closed space used to accommodate the gear transmission mechanism; the lower end of the drive shaft 101 extends into this cavity, and a first gear 303 is fixedly installed at its end by key connection or interference fit; the first gear 303 serves as the power input gear of the entire transmission system.

[0031] It should be further explained that the diameter of the first gear 303 is larger than that of the second gear 305, the diameter of the second gear 305 is smaller than that of the third gear 306, and the diameter of the third gear 306 is larger than that of the fourth gear 309. Through this specific ratio of gear diameters, a two-stage speed-increasing transmission mechanism is formed: the first stage achieves a primary speed increase by meshing the first gear 303 and the second gear 305, enabling the transmission shaft 304 to achieve a rotational speed higher than that of the drive shaft 101; the second stage achieves a secondary speed increase by meshing the third gear 306 and the fourth gear 309, ultimately enabling the high-speed shaft 401 and the high-speed cutter head 402 to achieve a rotational speed much higher than that of the drive shaft 101, thereby achieving high-speed fine crushing without the need for an additional high-speed drive motor, simplifying the structure and reducing energy consumption.

[0032] It should be further noted that the bottom of the third crushing section 4 is provided with a pull-out collection drawer 6 to collect or store the crushed material. The working process of this embodiment is as follows: The drive motor 1 is started, and the drive shaft 101 drives the low-speed cutter head 102 to rotate for initial crushing. After being guided by the baffle 5, the material enters the third crushing section 4 through the feeding channel 301. Simultaneously, the power of the drive shaft 101 is transmitted through the speed-increasing transmission of the first gear 303, the second gear 305, the transmission shaft 304, the third gear 306, and the fourth gear 309, driving the high-speed shaft 401 and the high-speed cutter head 402 to rotate at high speed, finely crushing the falling material. The crushed powder falls into the collection drawer 6 at the bottom.

[0033] Example 2: It should be further explained that the transmission part in Embodiment 1 is optimized. A fixed housing 307 is provided outside the transmission shaft 304. The transmission shaft 304 and the fixed housing 307 are connected by bearings. The fixed housing 307 moves within the transmission cavity 302. By moving, the transmission between the first gear 303 and the fourth gear 309 can be controlled. A push rod 308 is provided on one side of the fixed housing 307. The push rod 308 can be fixed with a locking nut. A spring is provided on the other side of the fixed housing 307 to push the fixed housing 307 to move along the direction of the push rod 308. Spring 310 ensures that the second gear 305 and the first gear 303 maintain a tight, gapless meshing state. When it is necessary to stop the high-speed cutter head 402, or to stop the high-speed crushing function of the third crushing section 4 (i.e., to disconnect the high-speed transmission), the push rod 308 can be pressed manually or through a mechanism. This causes the fixed housing 307 to compress the spring 310 and move away from the first gear 303, thereby disengaging the second gear 305 from the first gear 303, interrupting the transmission chain, and stopping the high-speed shaft 401 from rotating. After releasing the push rod 308, the gears re-engage under the action of the spring 310. This structure realizes manual clutch control of the transmission, increases operational flexibility, and is convenient for use when only primary crushing or maintenance is required.

[0034] Example 3 It needs to be further explained that, such as Figure 5 As shown, the transmission part in Embodiment 1 is optimized. The lower part of the baffle 5 is provided with a first guide plate 802 and a second guide plate 801. The first guide plate 802 is inclined toward the second guide plate 801. The side of the second guide plate 801 facing the first guide plate 802 is provided with a discharge chamber 803. The upper part of the discharge chamber 803 is provided with a filter screen. The material that has been crushed for the first time is screened through the filter screen, which increases the pre-screening function. It can separate the fine powder that is initially qualified in advance, reduce the amount of material entering the high-speed crushing zone and the ineffective circulation, thereby improving the overall crushing efficiency, reducing energy consumption, and making the particle size of the final product more uniform and controllable. Large pieces of material fall along the inclined second guide plate 801 into the feeding channel 301, and finally go to the third crushing section 4 for final crushing. The working process is supplemented as follows: After initial crushing in the first crushing section 2, the material falls onto the baffle 5, then slides down to the first guide plate 802 and slides down its inclined surface. When the material reaches the filter area of ​​the second guide plate 801, the finer particles that have reached or are close to the target fineness can pass through the filter and fall into the discharge chamber 803 below, and directly enter the third crushing section 4. The coarser particles that do not meet the fineness requirements are blocked by the filter. They will be guided along the inclined surface of the second guide plate 801 and collected at the inlet of the feeding channel 301, and then enter the third crushing section 4 through the feeding channel 301 to receive further crushing by the high-speed cutter head 402.

[0035] Working principle of this invention: In use, this invention involves pouring material into the first crushing section 2, starting the drive motor 1, and having the drive shaft 101 of the drive motor 1 rotate the low-speed cutter head 102 to initially crush the material, thereby reducing the overall particle size and initial impact heat. After crushing, the material is fed through the feeding channel 301 and enters the third crushing section 4 for fine crushing. In the third crushing section 4, the high-speed shaft 401 drives the high-speed cutter head 402 to rotate, crushing large pieces of material. The multi-stage crushing method can adapt to grains with different hardness and particle size, avoiding over-crushing or uneven crushing caused by single high-speed crushing, effectively improving the particle size uniformity and processing quality of the finished powder. The use of gears with different diameters achieves a speed-increasing effect, ensuring stable power transmission without the need for an additional high-speed drive motor 1, simplifying the structure and reducing energy consumption. The device is also equipped with a pull-out collection drawer 6, which facilitates powder collection and cleaning, improving ease of use. The first crushing section 2 and the third crushing section 4 are connected by the feeding channels 301 on both sides of the transmission chamber 302, forming a diversion heat dissipation path. Combined with the low-speed crushing of the first crushing section 2 to reduce heat generation, the temperature rise in the crushing chamber can be significantly reduced, avoiding problems such as powder clumping, oil precipitation and nutrient destruction caused by excessive temperature during continuous operation or processing of oily grains, thereby better maintaining the flavor and quality of the grain powder.

[0036] 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 grinding device for processing grains and cereals, characterized in that, include, The first pulverizing section, the second pulverizing section, and the third pulverizing section are arranged sequentially from top to bottom; The first crushing section has a drive shaft, one end of which is connected to a drive motor, and the other end of which passes through the second crushing section. The drive shaft is provided with an axially arrayed low-speed cutter head. The second crushing section is provided with a transmission chamber, and feeding channels are provided on both sides of the transmission chamber; The third crushing section is connected to the first crushing section through the feeding channel, and the third crushing section has a high-speed shaft. One end of the high-speed shaft passes through the driving cavity, and the other end of the high-speed shaft is provided with a high-speed cutter head.

2. The grain grinding device according to claim 1, characterized in that, The second crushing section also includes: The first gear is fixedly connected to the extension end of the drive shaft; A drive shaft is disposed on one side of the first gear, and a second gear is disposed at one end of the drive shaft close to the first gear, and a third gear is disposed at the other end away from the drive shaft, wherein the first gear and the second gear mesh. The fourth gear is fixedly connected to the extension end of the high-speed shaft, and the fourth gear meshes with the third gear.

3. The grain grinding device according to claim 2, characterized in that, The diameter of the first gear is larger than that of the second gear, the diameter of the second gear is smaller than that of the third gear, and the diameter of the third gear is larger than that of the fourth gear.

4. The grain grinding device according to claim 2, characterized in that, The bottom of the third crushing section is equipped with a pull-out collection drawer.

5. A pulverizing device for processing grains and cereals according to claim 1, characterized in that, A baffle is provided between the first crushing section and the second crushing section.

6. The grain grinding device according to claim 1, characterized in that, The drive shaft is provided with a fixed shell, a push rod is provided on one side of the fixed shell, and a spring is provided on the other side of the fixed shell to push the fixed shell to move along the direction of the push rod.

7. A pulverizing device for processing grains and cereals according to claim 5, characterized in that, The lower part of the baffle is provided with a first guide plate and a second guide plate, with the first guide plate inclined toward the second guide plate.

8. A grain grinding device according to claim 7, characterized in that, The second guide plate is equipped with a filter screen.

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