Multi-stage circulating crushing and grinding equipment for cereal raw materials and use method of multi-stage circulating crushing and grinding equipment

Abstract

The invention relates to the technical field of crushing and grinding equipment, and discloses cereal raw material multi-stage circulating crushing and grinding equipment which comprises an equipment box body, a dust falling and collecting mechanism is arranged outside the equipment box body, a fixing rod is fixedly installed at the top of the equipment box body, and a sealing protective cover is slidably connected to the outer portion of the fixing rod. And a first dust suction pipe ring is fixedly mounted on the inner top wall of the sealing protective cover. According to the multi-stage circulating crushing and grinding equipment for the cereal raw materials and the using method thereof, the sealing protective cover is connected outside the material injection pipe in a sleeving mode, and dust dissipation during cereal crushing and grinding is prevented; a dust collection fan is matched with a first dust collection pipe ring, a feeding hose and a third dust collection pipe ring to continuously extract dust in the first-stage grinding box and the second-stage grinding box, and the dust is guided into a filtering dust collection bag in a dust collection box through a dust collection pipe; the water storage tank is connected with the conveying pump, water mist is sprayed through the atomizing pipe ring, and secondary flying of dust is restrained; dust pollution and explosion risks are effectively reduced, and meanwhile a good working environment is maintained.

Description

Technical Field

[0001] The invention relates to the technical field of crushing and grinding equipment, in particular to a multi-stage circulation crushing and grinding equipment for grain raw materials and a use method thereof. Background Art

[0002] As a key processing tool, crushing and grinding equipment is widely used in agriculture, food industry and other fields. It is mainly used for crushing and fine grinding of materials such as grains. In the traditional processing process, this type of equipment uses mechanical force to break down raw materials into smaller particles or powdered substances to meet the needs of subsequent processing or direct use.

[0003] After searching, the invention patent with patent publication number CN116764745A discloses a multi-stage circulation crushing and grinding equipment for grain raw materials, including a processing table, a barrel, a grinding barrel, a crushing barrel, a dust suction mechanism, a circulation feeding mechanism, a ventilation mechanism, a pneumatic expansion mechanism and an air charging and suction mechanism, the barrel is embedded and fixed on the upper surface of the processing table, the bottom of the barrel is integrally formed with the grinding barrel, the upper surface of the processing table is located on the right side of the barrel and the crushing barrel is fixedly installed, and the upper surface of the processing table is located on the left side of the barrel and the dust suction mechanism is fixedly installed; the present invention uses the dust suction mechanism arranged on the processing table to absorb dust generated when grains enter the barrel and the filter screen sieves the grains, and through the circulating feeding mechanism, the grains that are preliminarily crushed in the crushing barrel are re-transmitted to the feed hopper through the arranged circulation feeding mechanism, so as to realize circulation crushing.

[0004] The above-mentioned crushing and grinding equipment still has a series of problems that need to be solved in the actual operation process; when grains are put into the equipment for crushing and grinding, a large amount of dust will be generated. This dust is not only easy to escape from the inside of the equipment and pollute the surrounding environment, but also due to its high dispersibility and flammability, it increases the risk of dust explosion, thereby threatening the safety and health of on-site workers; in addition, the dust generated by the crushing and grinding process adheres to the outer surface of the equipment, bringing additional challenges to the daily maintenance and upkeep of the equipment. The long-term accumulation of dust not only affects the appearance and neatness of the equipment, but may also interfere with the normal operation of the equipment, reduce work efficiency, and increase maintenance costs. Therefore, the present invention proposes a multi-stage circulation crushing and grinding equipment for grain raw materials and a method for using the same. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a multi-stage circulation crushing and grinding equipment for grain raw materials and a method for using the equipment, which has the advantages of effectively reducing dust escape, improving the working environment and reducing the risk of explosion, and solves the problem that a large amount of dust will be generated when grains are put into the equipment for crushing and grinding. The dust is not only easy to escape from the inside of the equipment and pollute the surrounding environment, but also due to its high dispersibility and flammability, it increases the risk of dust explosion, thereby threatening the safety and health of on-site workers; in addition, the dust generated by the crushing and grinding process adheres to the outer surface of the equipment, bringing additional challenges to the daily maintenance and upkeep of the equipment. The long-term accumulation of dust not only affects the appearance and neatness of the equipment, but may also interfere with the normal operation of the equipment, reduce work efficiency, and increase maintenance costs.

[0006] In order to achieve the above-mentioned purpose of effectively reducing dust emission, improving the working environment and reducing the risk of explosion, the present invention provides the following technical solution: a multi-stage circulation crushing and grinding device for grain raw materials, comprising an equipment box, a primary grinding box and a secondary grinding box are fixedly installed inside the equipment box, a grinding mechanism is arranged inside the primary grinding box and the secondary grinding box, and a dust reduction and dust collection mechanism is arranged outside the equipment box; The dust reduction and dust collecting mechanism comprises a fixed rod, a sealing shield, a first dust suction pipe ring, a feeding hose, a second dust suction pipe ring, a third dust suction pipe ring, a dust collecting box, a dust suction fan, a dust collecting pipe, a delivery pump, a water storage tank, a connecting ring, a threaded rod, a filtering dust collecting bag and an atomizing pipe ring. The top of the equipment box is fixedly installed with a fixed rod, the outside of the fixed rod is slidably connected with a sealing shield, the inner top wall of the sealing shield is fixedly installed with a first dust suction pipe ring, the top of the sealing shield is fixedly installed with a feeding hose, the inside and bottom of the secondary grinding box are respectively fixedly installed with a second dust suction pipe ring and a third dust suction pipe ring, the outside of the equipment box is fixedly installed with a dust collecting box, the inside of the dust collecting box is fixedly installed with a dust suction fan, a dust collecting pipe, a delivery pump and a water storage tank, the bottom of the dust collecting pipe is fixedly installed with a connecting ring, the left and right sides of the connecting ring are rotatably connected with threaded rods, the inside of the dust collecting box is movably installed with a filtering dust collecting bag, and the inside of the dust collecting box is installed with an atomizing pipe ring.

[0007] Preferably, the grinding mechanism includes a filling pipe, a grinding roller, a driving motor, a driving box, a first transmission gear, a second transmission gear, a connecting pipe, a servo motor, a toggle plate, a grinding ring, a filter steel mesh, a connecting pipe and a feeding pipe. The top of the equipment case is fixedly installed with a filling pipe, the first-level grinding box is internally rotatably connected with two grinding rollers, the right side of the equipment case is fixedly installed with a driving motor, the right side of the equipment case is installed with a driving box, the internal of the driving box is rotatably connected with two first transmission gears and one second transmission gear, a connecting pipe for connecting to the second-level grinding box is fixedly installed at the bottom of the first-level grinding box, a servo motor is fixedly installed on the inner bottom wall of the second-level grinding box, a toggle plate is fixedly installed on the outside of the servo motor output shaft, a grinding ring is fixedly installed on the top of the servo motor output shaft, a filter steel mesh is fixedly installed inside the second-level grinding box, a connecting pipe is fixedly installed at the bottom of the second-level grinding box, and a feeding pipe is fixedly installed at the bottom of the connecting pipe.

[0008] Preferably, the sealing shield is sleeved on the outside of the injection pipe, the number of the first dust suction pipe rings is three, the three first dust suction pipe rings are interconnected, and one end of the feeding hose close to the sealing shield is connected to one of the first dust suction pipe rings.

[0009] Preferably, the third dust suction pipe ring is fixedly installed inside the connecting pipe, and the first material delivery pipe is fixedly installed on the front of the dust suction fan. The end of the first material delivery pipe away from the dust suction fan is connected to the first dust suction pipe ring and the second dust suction pipe ring, and the feeding hose is connected to the end away from the sealing shield.

[0010] Preferably, a second feed pipe is fixedly installed on the left side of the dust suction fan, and the end of the second feed pipe away from the dust suction fan is connected to the dust collecting pipe, the top of the filtering dust bag is sleeved with the connecting ring, and the threaded rod passes through the connecting ring and is threadedly connected to the top outer surface of the filtering dust bag.

[0011] Preferably, the delivery pump is connected to the water tank via a first delivery pipe fixedly installed on the right side, and the delivery pump is connected to the atomization tube ring via a second delivery pipe fixedly installed on the top, and the number of the atomization tube rings is two and they are interconnected.

[0012] Preferably, there are two grinding rollers, and the right sides of the two grinding rollers are fixedly connected to two first transmission gears respectively, the output end of the drive motor is fixedly connected to the second transmission gear, and the second transmission gear is located between the two first transmission gears and meshes with each other.

[0013] Preferably, the grinding ring is close to the inner top wall of the secondary grinding box, the shape of the grinding ring is adapted to the shape of the inner top wall of the secondary grinding box, and the bottom of the toggle plate is in contact with the top of the filter steel mesh.

[0014] Preferably, a connecting block is fixedly installed on the top of the grinding ring, a sliding ring is fixedly installed on the inner top wall of the secondary grinding box, and the grinding ring is slidably connected via the connecting block and the sliding ring.

[0015] A method for using a multi-stage circulation crushing and grinding device for grain raw materials, comprising the multi-stage circulation crushing and grinding device for grain raw materials, and further comprising the following steps: S1. Feeding operation: adding the grain raw materials to be processed into the primary grinding box through the feeding pipe; S2. Start the equipment: Start the drive motor and the servo motor to start the two grinding rollers in the primary grinding box and the grinding ring in the secondary grinding box to start running; the grinding rollers in the primary grinding box perform preliminary crushing on the grains; then the materials enter the secondary grinding box through the connecting pipe, and the servo motor drives the grinding ring to perform fine grinding on the materials; S3. Dust reduction treatment: During the entire processing process, the dust suction fan operates continuously, and the dust generated in each level of grinding box is effectively extracted through the first dust suction pipe circle, the second dust suction pipe circle and the third dust suction pipe circle; the extracted dust is guided to the filter dust collection bag through the dust collection pipe, and the water mist sprayed by the atomization pipe circle helps to reduce the dust concentration and prevent secondary dust; S4. Finished product collection: The ground grain powder is discharged through a discharge pipe, and a receiving container is provided at the discharge pipe for collecting the finished products.

[0016] Compared with the prior art, the present invention provides a multi-stage circulation crushing and grinding device for grain raw materials and a method for using the same, which has the following beneficial effects: 1. The multi-stage circulation crushing and grinding equipment for grain raw materials and the use method thereof significantly reduce the dust problem through the dust reduction and dust collection mechanism; it includes a sealing shield, which is sleeved on the outside of the injection pipe to prevent dust from escaping during grain crushing and grinding; the dust suction fan cooperates with the first dust suction pipe ring, the feeding hose and the third dust suction pipe ring to continuously extract the dust in the first-level grinding box and the second-level grinding box, and guides it to the filtering dust collection bag in the dust collection box through the dust collection pipe; the water storage tank is connected to the delivery pump, and water mist is sprayed through the atomizing pipe ring to suppress the secondary flying of dust; this design effectively reduces the risk of dust pollution and explosion, protects the safety and health of the staff, and maintains a good working environment.

[0017] 2. The multi-stage circulation crushing and grinding equipment for grain raw materials and the use method thereof filter the dust collecting bag, and the top is fixed to the threaded rod by a connecting ring, which is convenient for quick replacement or cleaning and simplifies the daily maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall planar structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the primary grinding box and the secondary grinding box of the present invention; Figure 4 It is a cross-sectional schematic diagram of the grinding mechanism of the present invention; Figure 5 For the present invention Figure 2 The enlarged schematic diagram at C in the middle; Figure 6 For the present invention Figure 2 The enlarged schematic diagram of point B in the middle; Figure 7 It is a schematic diagram of the three-dimensional structure of the grinding ring of the present invention; Figure 8 This is a schematic diagram of the dust reduction and dust collection mechanism of the present invention; Fig. 9 It is a partial top view schematic diagram of the grinding mechanism of the present invention; Fig.10 For the present invention Figure 2 Enlarged schematic diagram at point A in the middle.

[0019] In the figure: 1, equipment box; 2, primary grinding box; 3, secondary grinding box; 4, grinding mechanism; 401, injection pipe; 402, grinding roller; 403, drive motor; 404, drive box; 405, first transmission gear; 406, second transmission gear; 407, connecting pipe; 408, servo motor; 409, toggle plate; 410, grinding ring; 4101, connecting block; 4102, sliding ring; 411, filter steel mesh; 412, connecting Tube; 413, feed pipe; 5, dust reduction and dust collection mechanism; 501, fixing rod; 502, sealing shield; 503, first dust suction tube circle; 504, feed hose; 505, second dust suction tube circle; 506, third dust suction tube circle; 507, dust collection box; 508, dust suction fan; 509, dust collection tube; 510, delivery pump; 511, water storage tank; 512, connecting ring; 513, threaded rod; 514, filter dust collection bag; 515, atomization tube circle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-10A multi-stage circulation crushing and grinding device for grain raw materials comprises an equipment box 1, a primary grinding box 2 and a secondary grinding box 3 are fixedly installed inside the equipment box 1, a grinding mechanism 4 is arranged inside the primary grinding box 2 and the secondary grinding box 3, and a dust reduction and collection mechanism 5 is arranged outside the equipment box 1; The dust reduction and dust collection mechanism 5 includes a fixed rod 501, a sealing shield 502, a first dust suction pipe ring 503, a feeding hose 504, a second dust suction pipe ring 505, a third dust suction pipe ring 506, a dust collection box 507, a dust suction fan 508, a dust collection pipe 509, a delivery pump 510, a water storage tank 511, a connecting ring 512, a threaded rod 513, a filtering dust collection bag 514 and an atomizing pipe ring 515. The top of the equipment box 1 is fixedly installed with a fixed rod 501, the outer side of the fixed rod 501 is slidably connected to the sealing shield 502, the inner top wall of the sealing shield 502 is fixedly installed with the first dust suction pipe ring 503, and the sealing shield 502 is A feeding hose 504 is fixedly installed on the top, a second dust suction pipe circle 505 and a third dust suction pipe circle 506 are fixedly installed inside and at the bottom of the secondary grinding box 3 respectively, a dust collecting box 507 is fixedly installed outside the equipment box 1, a dust suction fan 508, a dust collecting pipe 509, a delivery pump 510 and a water storage tank 511 are fixedly installed inside the dust collecting box 507, a connecting ring 512 is fixedly installed on the bottom of the dust collecting pipe 509, threaded rods 513 are rotatably connected to the left and right sides of the connecting ring 512, a filtering dust bag 514 is movably installed inside the dust collecting box 507, and an atomizing pipe circle 515 is installed inside the dust collecting box 507.

[0022] Furthermore, the grinding mechanism 4 includes a feeding pipe 401, a grinding roller 402, a driving motor 403, a driving box 404, a first transmission gear 405, a second transmission gear 406, a connecting pipe 407, a servo motor 408, a toggle plate 409, a grinding ring 410, a filter steel mesh 411, a connecting pipe 412 and a feeding pipe 413. The feeding pipe 401 is fixedly installed on the top of the equipment box 1, and two grinding rollers 402 are rotatably connected inside the primary grinding box 2. The driving motor 403 is fixedly installed on the right side of the equipment box 1, and the driving box 404 is installed on the right side of the equipment box 1. The first grinding box 2 is rotatably connected with two first transmission gears 405 and one second transmission gear 406. A connecting pipe 407 for connecting to the secondary grinding box 3 is fixedly installed at the bottom of the first grinding box 2. A servo motor 408 is fixedly installed on the inner bottom wall of the secondary grinding box 3. A toggle plate 409 is fixedly installed on the outside of the output shaft of the servo motor 408. A grinding ring 410 is fixedly installed on the top of the output shaft of the servo motor 408. A filter steel mesh 411 is fixedly installed inside the secondary grinding box 3. A connecting pipe 412 is fixedly installed at the bottom of the secondary grinding box 3, and a discharge pipe 413 is fixedly installed at the bottom of the connecting pipe 412.

[0023] A method for using a multi-stage circulation crushing and grinding device for grain raw materials, comprising the multi-stage circulation crushing and grinding device for grain raw materials, and further comprising the following steps: S1, feeding operation: adding the grain raw materials to be processed into the primary grinding box 2 through the injection pipe 401; S2, start the equipment: start the driving motor 403 and the servo motor 408, so that the two grinding rollers 402 in the primary grinding box 2 and the grinding ring 410 in the secondary grinding box 3 start to operate; the grinding rollers 402 in the primary grinding box 2 perform preliminary crushing on the grains; then the materials enter the secondary grinding box 3 through the connecting pipe 407, and the servo motor 408 drives the grinding ring 410 to perform fine grinding on the materials; S3. Dust reduction treatment: During the entire processing process, the dust suction fan 508 operates continuously, and the dust generated in each level of the grinding box is effectively extracted through the first dust suction pipe circle 503, the second dust suction pipe circle 505 and the third dust suction pipe circle 506; the extracted dust is guided to the filter dust bag 514 through the dust collection pipe 509, and the water mist sprayed by the atomization pipe circle 515 helps to reduce the dust concentration, prevent secondary dust, and improve the dust removal efficiency; S4, finished product collection: the ground grain powder is discharged through the discharge pipe 413, where a receiving container is provided for collecting the finished products.

[0024] In the multi-stage circulation crushing and grinding equipment for grain raw materials, the design of the dust reduction and collection mechanism 5 is crucial to improving the working environment, protecting the health of workers and ensuring the normal operation of the equipment; this mechanism effectively controls and reduces dust emission through a series of carefully designed components. Specifically, the working principle of the dust reduction and collection mechanism 5 is based on the basic theories of aerodynamics and fluid mechanics, and utilizes negative pressure extraction technology combined with wet dust removal method to achieve efficient dust removal.

[0025] When the grain raw materials are fed into the primary grinding box 2 for preliminary crushing, a large amount of dust will be generated due to mechanical action; in order to prevent the dust from escaping from the injection pipe 401, the sealing shield 502 is sleeved on the outside of the injection pipe 401 and is slidably connected to the fixed rod 501 to form a relatively closed space; at the same time, the first dust suction pipe circle 503 installed on the inner top wall of the sealing shield 502 will continuously generate negative pressure, sucking in the generated dust and transmitting it to the dust collecting box 507 through the feeding hose 504; in addition, the second dust suction pipe circle 505 and the third dust suction pipe circle 506 are also arranged inside and at the bottom of the secondary grinding box 3, which can effectively capture the dust generated during each level of grinding.

[0026] The dust suction fan 508 serves as the power source of the entire dust reduction and dust collection system. A first conveying pipe is installed on the front of the dust suction fan 508. The end of the first conveying pipe away from the dust suction fan 508 is respectively connected to the first dust suction pipe circle 503, the second dust suction pipe circle 505 and the feeding hose 504, thereby constructing a complete dust collection path; and the second conveying pipe on the left side of the dust suction fan 508 is connected to the dust collection pipe 509, which guides all collected dust into the filtering dust bag 514; in this process, the filtering dust bag 514 plays a key role. It is located inside the dust box 507 and is fixed by the top connecting ring 512 and the threaded rods 513 on the left and right sides to ensure good air tightness and easy replacement or cleaning.

[0027] In order to further improve the dust reduction effect and reduce the risk of secondary dust, the present invention also specially designs an atomizing spray device; the water tank 511 is connected to the delivery pump 510 through the first delivery pipe on the right, and the latter delivers water to two interconnected atomizing pipe circles 515 through the second delivery pipe on the top; when the water becomes tiny droplets after atomization treatment, it can be more evenly spread throughout the working area, quickly wet the suspended particles, increase their weight and make them settle, thereby achieving the purpose of suppressing dust flying; this wet dust removal method not only improves the dust removal efficiency, but also reduces the impact on the environment, providing users with a safer and more comfortable working environment.

[0028] Specifically, in the multi-stage circulation crushing and grinding equipment for grain raw materials, the grinding mechanism 4 is the core part for realizing the graded crushing of materials. The working process of the grinding mechanism 4 mainly includes four stages: feeding, starting, crushing and discharging. Each stage is closely related and together constitutes a complete grinding process.

[0029] First, in the feeding stage, the operator needs to add the grain raw materials to be processed into the primary grinding box 2 through the injection pipe 401; when the primary grinding box 2 is full of grain raw materials, the sealing shield 502 is sleeved on the outside of the injection pipe 401 to ensure that the dust in the feeding process will not escape; the prior art is to crush and grind while feeding, on the one hand, this will cause the dust in the primary grinding box 2 to be dispersed, on the other hand, too much grain raw materials in the primary grinding box 2 will affect the crushing effect of the grinding roller 402 and cause blockage, etc., while in the present invention, when the primary grinding box 2 is full of grain raw materials, the sealing shield 502 is sleeved on the outside of the injection pipe 401, although it affects the efficiency to a certain extent, it ensures the crushing and grinding effect and the cleanliness of the working area.

[0030] Next, the startup phase is entered, i.e. the drive motor 403 and the servo motor 408 are turned on, so that the two grinding rollers 402 in the primary grinding box 2 start to rotate; the two grinding rollers 402 are fixedly connected to the two first transmission gears 405 respectively, and the output shaft of the drive motor 403 is connected to the second transmission gear 406; since the second transmission gear 406 is located between the two first transmission gears 405 and meshes with each other, when the drive motor 403 is running, the grinding rollers 402 are driven to rotate synchronously through the cooperation between the gears, so as to perform preliminary crushing of the grain raw materials.

[0031] As the materials are gradually ground into smaller particles, they will naturally flow into the secondary grinding box 3 through the connecting pipe 407; here, the servo motor 408 plays a role, and a toggle plate 409 and a grinding ring 410 are fixedly installed on its output shaft; wherein, the bottom of the toggle plate 409 fits with the top of the filter steel mesh 411, and the material is continuously turned over under the drive of the servo motor 408 to ensure that each particle can be fully filtered, and qualified particles pass through the filter steel mesh 411, while unqualified particles remain on the filter steel mesh 411. The box door on the front of the secondary grinding box 3 is opened, and the material can be taken out for secondary crushing and grinding; the grinding ring 410 is close to the inner top wall of the secondary grinding box 3, and its shape is adapted thereto, ensuring the minimum gap between the two, thereby improving the grinding efficiency. When the servo motor 408 drives the grinding ring 410 to rotate, it will exert continuous pressure and shear force on the material below, thereby achieving a finer grinding effect.

[0032] Finally, after completing all the above steps, the ground fine powder will be discharged from the equipment through the connecting pipe 412 and the discharge pipe 413; the user can choose a suitable container to collect the finished product according to actual needs.

[0033] In summary, the multi-stage circulation crushing and grinding equipment for grain raw materials and the use method thereof significantly reduce the dust problem through the dust reduction and dust collection mechanism 5; it includes a sealing shield 502, which is sleeved on the outside of the injection pipe 401 to prevent dust from escaping during grain crushing and grinding; the dust suction fan 508 cooperates with the first dust suction pipe ring 503, the feeding hose 504 and the third dust suction pipe ring 506 to continuously extract the dust in the first grinding box 2 and the second grinding box 3, and guides it to the filtering dust bag 514 in the dust box 507 through the dust collecting pipe 509; the water storage tank 511 is connected to the conveying pump 510, and water mist is sprayed through the atomizing pipe ring 515 to suppress the secondary flying of dust; this design effectively reduces the risk of dust pollution and explosion, protects the safety and health of the staff, and maintains a good working environment.

[0034] Furthermore, the multi-stage circulation crushing and grinding equipment for grain raw materials and the method for using the same, through filtering dust collecting bags 514, the top of which is fixed to the threaded rod 513 by a connecting ring 512, is convenient for quick replacement or cleaning, simplifies the daily maintenance process, and solves the problem that when grains are put into the equipment for crushing and grinding, a large amount of dust will be generated. Such dust is not only easy to escape from the inside of the equipment and pollute the surrounding environment, but also increases the risk of dust explosion due to its high dispersibility and flammability, thereby threatening the safety and health of on-site workers; in addition, the dust generated by the crushing and grinding process adheres to the outer surface of the equipment, bringing additional challenges to the daily maintenance and upkeep of the equipment. The long-term accumulation of dust not only affects the appearance and neatness of the equipment, but may also interfere with the normal operation of the equipment, reduce work efficiency, and increase maintenance costs.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage circulation crushing and grinding device for grain raw materials, comprising a device housing (1), characterized in that: A primary grinding box (2) and a secondary grinding box (3) are fixedly installed inside the equipment box (1); a grinding mechanism (4) is arranged inside the primary grinding box (2) and the secondary grinding box (3); and a dust reduction and collection mechanism (5) is arranged outside the equipment box (1); The dust reduction and dust collection mechanism (5) comprises a fixed rod (501), a sealing shield (502), a first dust suction pipe ring (503), a feeding hose (504), a second dust suction pipe ring (505), a third dust suction pipe ring (506), a dust collection box (507), a dust suction fan (508), a dust collection pipe (509), a delivery pump (510), a water storage tank (511), a connecting ring (512), a threaded rod (513), a filtering dust collection bag (514) and an atomizing pipe ring (515). The top of the equipment box (1) is fixedly mounted with the fixed rod (501), the outer part of the fixed rod (501) is slidably connected with the sealing shield (502), the inner top wall of the sealing shield (502) is fixedly mounted with the first dust suction pipe ring (503), and the sealing shield (502) is fixedly mounted with the first dust suction pipe ring (503). ) is fixedly mounted on the top of the secondary grinding box (3); a second dust suction pipe ring (505) and a third dust suction pipe ring (506) are fixedly mounted inside and at the bottom of the secondary grinding box (3), respectively; a dust collecting box (507) is fixedly mounted on the outside of the equipment box body (1); a dust suction fan (508), a dust collecting pipe (509), a delivery pump (510) and a water storage tank (511) are fixedly mounted inside the dust collecting box (507); a connecting ring (512) is fixedly mounted on the bottom of the dust collecting pipe (509); threaded rods (513) are rotatably connected to the left and right sides of the connecting ring (512); a filtering dust collecting bag (514) is movably mounted inside the dust collecting box (507); and an atomizing pipe ring (515) is mounted inside the dust collecting box (507).

2. The multi-stage circulation crushing and grinding equipment for grain raw materials according to claim 1 is characterized in that: The grinding mechanism (4) comprises a material injection pipe (401), a grinding roller (402), a driving motor (403), a driving box (404), a first transmission gear (405), a second transmission gear (406), a connecting pipe (407), a servo motor (408), a toggle plate (409), a grinding ring (410), a filter steel mesh (411), a connecting pipe (412) and a feeding pipe (413). The material injection pipe (401) is fixedly installed on the top of the equipment housing (1), two grinding rollers (402) are rotatably connected inside the primary grinding box (2), a driving motor (403) is fixedly installed on the right side of the equipment housing (1), and a driving box (404) is installed on the right side of the equipment housing (1). The driving box (404) ) are internally rotatably connected with two first transmission gears (405) and one second transmission gear (406); a connecting pipe (407) for connecting with a secondary grinding box (3) is fixedly installed at the bottom of the primary grinding box (2); a servo motor (408) is fixedly installed on the inner bottom wall of the secondary grinding box (3); a toggle plate (409) is fixedly installed on the outside of the output shaft of the servo motor (408); a grinding ring (410) is fixedly installed on the top of the output shaft of the servo motor (408); a filter steel mesh (411) is fixedly installed inside the secondary grinding box (3); a connecting pipe (412) is fixedly installed at the bottom of the secondary grinding box (3); and a feed pipe (413) is fixedly installed at the bottom of the connecting pipe (412).

3. The multi-stage circulation crushing and grinding equipment for grain raw materials according to claim 2 is characterized in that: The sealing shield (502) is sleeved on the outside of the injection pipe (401), the number of the first dust suction pipe rings (503) is three, the three first dust suction pipe rings (503) are interconnected, and one end of the feeding hose (504) close to the sealing shield (502) is connected to one of the first dust suction pipe rings (503).

4. The multi-stage circulation crushing and grinding equipment for grain raw materials according to claim 2 is characterized in that: The third dust suction pipe ring (506) is fixedly installed inside the connecting pipe (412); a first material delivery pipe is fixedly installed on the front side of the dust suction fan (508); an end of the first material delivery pipe away from the dust suction fan (508) is connected to the first dust suction pipe ring (503) and the second dust suction pipe ring (505); and the material delivery hose (504) is connected to an end away from the sealing shield (502).

5. The multi-stage circulation crushing and grinding equipment for grain raw materials according to claim 1, characterized in that: A second conveying pipe is fixedly mounted on the left side of the dust suction fan (508); one end of the second conveying pipe away from the dust suction fan (508) is connected to the dust collecting pipe (509); the top of the filtering dust collecting bag (514) is sleeved with the connecting ring (512); the threaded rod (513) passes through the connecting ring (512) and is threadedly connected to the outer surface of the top of the filtering dust collecting bag (514).

6. The multi-stage circulation crushing and grinding equipment for grain raw materials according to claim 1, characterized in that: The delivery pump (510) is connected to the water storage tank (511) via a first delivery pipe fixedly installed on the right side, and the delivery pump (510) is connected to an atomization pipe ring (515) via a second delivery pipe fixedly installed on the top, and the number of the atomization pipe rings (515) is two and they are interconnected.

7. The multi-stage circulation crushing and grinding equipment for grain raw materials according to claim 2 is characterized in that: There are two grinding rollers (402), and the right sides of the two grinding rollers (402) are respectively fixedly connected to two first transmission gears (405), the output end of the drive motor (403) is fixedly connected to the second transmission gear (406), and the second transmission gear (406) is located between the two first transmission gears (405) and meshes with each other.

8. The multi-stage circulation crushing and grinding equipment for grain raw materials according to claim 2, characterized in that: The grinding ring (410) is close to the inner top wall of the secondary grinding box (3); the shape of the grinding ring (410) is compatible with the shape of the inner top wall of the secondary grinding box (3); and the bottom of the toggle plate (409) is in contact with the top of the filter steel mesh (411).

9. The multi-stage circulation crushing and grinding equipment for grain raw materials according to claim 2, characterized in that: A connecting block (4101) is fixedly mounted on the top of the grinding ring (410), and a sliding ring (4102) is fixedly mounted on the inner top wall of the secondary grinding box (3); the grinding ring (410) is slidably connected via the connecting block (4101) and the sliding ring (4102).

10. A method for using a multi-stage circulation crushing and grinding device for grain raw materials, characterized in that: The method is implemented by using the multi-stage circulation crushing and grinding equipment for cereal raw materials as described in any one of claims 1 to 9, and the method comprises the following steps: S1, feeding operation: adding the grain raw materials to be processed into the primary grinding box (2) through the feeding pipe (401); S2, starting the equipment: starting the driving motor (403) and the servo motor (408), so that the two grinding rollers (402) in the primary grinding box (2) and the grinding ring (410) in the secondary grinding box (3) start to operate; the grinding rollers (402) in the primary grinding box (2) perform preliminary crushing on the grains; then the materials enter the secondary grinding box (3) through the connecting pipe (407), and the servo motor (408) drives the grinding ring (410) to perform fine grinding on the materials; S3, dust reduction treatment: During the entire processing process, the dust suction fan (508) operates continuously, and effectively extracts the dust generated in each level of the grinding box through the first dust suction pipe circle (503), the second dust suction pipe circle (505) and the third dust suction pipe circle (506); the extracted dust is guided to the filter dust collection bag (514) through the dust collection pipe (509), and the water mist sprayed by the atomization pipe circle (515) helps to reduce the dust concentration and prevent secondary dust; S4, finished product collection: the ground grain powder is discharged through a discharge pipe (413), and a receiving container is provided at the discharge pipe for collecting the finished product.

Images