Full-automatic material grinding, particle screening and sorting integrated machine for food processing

Abstract

This application relates to the technical field of food processing equipment, and proposes a fully automatic integrated crushing, grinding, and screening machine for food processing, including a crushing mechanism, a screening mechanism, and a conveying mechanism; the crushing mechanism includes a double-roll crusher; the screening mechanism includes a screening frame, a screen box, and a vibration drive; the screen box is inclinedly supported on the screening frame; the upper end of the inclined screen box extends below the discharge port of the double-roll crusher; a first screen and a second screen are parallelly supported in the inner cavity of the screen box; the first screen and the second screen cooperate to divide the inner cavity of the screen box into a coarse material cavity, a qualified material cavity, and a fine material cavity; the lower end of the inclined screen box is connected to a coarse material pipe, a qualified material pipe, and a fine material pipe; the coarse material pipe, the qualified material pipe, and the fine material pipe are respectively connected to the coarse material cavity, the qualified material cavity, and the fine material cavity; the vibration drive is used to drive the screen box to vibrate; the input end and the output end of the conveying mechanism are respectively connected to the coarse material pipe and the double-roll crusher. This application has the effect of improving the production efficiency of rice crisps.

Description

Technical Field

[0001] This application relates to the field of food production equipment, and in particular to a fully automatic integrated crushing, grinding and screening machine for food processing. Background Technology

[0002] During the production process, crispy cones often become defective due to various issues, resulting in imperfect appearances or incomplete shaping. To reduce waste, these defective cones are processed to form crispy rice, which is then added to subsequent ice cream products.

[0003] After the defective crispy cones are crushed and ground, the rice crisps usually have inconsistent particle sizes, which will affect the taste of subsequent ice cream products if used directly. Therefore, they need to be sieved to remove the rice crisps that are too large or too small in order to obtain rice crisps that meet the qualified particle size. At the same time, the rice crisps that are too large will be crushed a second time to obtain rice crisps with the qualified particle size.

[0004] Regarding the aforementioned technologies, the current production process of rice crisps requires manual intervention in processes such as sieving after the crispy tubes are crushed and secondary crushing. The numerous steps result in low production efficiency, thus there is room for improvement. Utility Model Content

[0005] To improve the production efficiency of rice crisps, this application provides a fully automatic integrated crushing, grinding, and screening machine for food processing.

[0006] This application provides a fully automatic integrated crushing, grinding, and screening machine for food processing, which adopts the following technical solution: A fully automatic integrated crushing, grinding, and screening machine for food processing includes a double-roll crusher, a screening mechanism, and a conveying mechanism; The double-roller pulverizer is used to pulverize substandard crispy rice rolls and excessively large crispy rice. The screening mechanism includes a screening frame, a screen box, and a vibration drive component. The screen box is inclinedly supported on the screening frame. The top of the screen box is open. The inclined upper end of the screen box extends below the discharge port of the double-roller crusher. A first screen and a second screen are parallelly supported inside the screen box. The first screen and the second screen are used to screen out oversized rice crisps and qualified rice crisps, respectively. The first screen and the second screen cooperate to divide the inner cavity of the screen box into a coarse material cavity, a qualified material cavity, and a fine material cavity. A coarse material pipe, a qualified material pipe, and a fine material pipe are connected to the inclined lower end of the screen box. The coarse material pipe, the qualified material pipe, and the fine material pipe are respectively connected to the coarse material cavity, the qualified material cavity, and the fine material cavity. The vibration drive component is used to drive the screen box to vibrate. The input and output ends of the conveying mechanism are respectively connected to the coarse material pipe and the double roller crusher. The conveying mechanism is used to convey the oversized rice brittle discharged from the coarse material pipe to the double roller crusher for secondary crushing.

[0007] By adopting the above technical solution, the defective crispy rice rolls are initially crushed by a double-roller crusher to form rice crisps, which then automatically fall into the sieve box of the screening mechanism. The vibration drive of the screening mechanism, together with the first and second screens in the sieve box, classifies and screens out oversized rice crisps, qualified rice crisps, and undersized rice crisps. At the same time, oversized rice crisps enter the conveying mechanism through the coarse material pipe of the sieve box and are then transported back to the double-roller crusher for secondary crushing to continue forming qualified rice crisps. The entire rice crisp production process does not require manual intervention, effectively improving the production efficiency of rice crisps.

[0008] Preferably, the conveying mechanism includes a lifting conveyor, which includes a horizontal conveying section and an inclined conveying section; the coarse material pipe extends inclined downward above the horizontal conveying section of the lifting conveyor; a guide chute is provided at the output end of the inclined conveying section of the lifting conveyor, and the guide chute extends inclined downward above the feed inlet of the double roller crusher.

[0009] By adopting the above technical solution, the oversized rice crisps discharged from the coarse material pipe can be conveyed to the double roller crusher by the lifting conveyor, which facilitates the secondary crushing of the oversized rice crisps.

[0010] Preferably, the feed inlet of the double roller crusher is connected to a feed funnel, which is wider at the top and narrower at the bottom; a protective barrier is provided at the top opening of the feed funnel, and the protective barrier covers the top opening of the feed funnel. The protective enclosure includes a support frame, within which several enclosure rods are horizontally connected. A feeding gap is left between adjacent enclosure rods, which is used to allow the crispy rice cake tubes and excessively large-diameter rice crisps to pass through.

[0011] By adopting the above technical solution, the defective crispy rice tubes and oversized rice crisps can fall into the crusher frame through the feeding funnel, which helps to limit the splashing of the defective crispy rice tubes and oversized rice crisps to the outside of the crusher frame when they come into contact with the crushing rollers; by setting up protective barriers, the crushing rollers can be restricted from being touched by external foreign objects and by operators during their rotation.

[0012] Preferably, the bottom opening of the feed hopper is supported by two guide plates, which are located above the two crushing rollers of the double roller crusher. Both guide plates are inclined downward toward the crushing gap between the two crushing rollers, and a material passage gap is left between the two guide plates.

[0013] By adopting the above technical solution, the defective crispy tubes and overly large rice crisps can be accurately fed into the space between the two crushing rollers through two guide plates, which facilitates better crushing and abrasive processing of the materials by the two relatively rotating crushing rollers.

[0014] Preferably, the first screen and the second screen are connected by a support plate; The inner cavity of the sieve box is provided with supporting ridges on opposite sides, and the bottom of the second sieve mesh overlaps on the two supporting ridges. The sieve box is provided with a connecting component, which is used to cooperate with the supporting protrusion to connect and limit the first sieve and the second sieve.

[0015] By adopting the above technical solution, on the one hand, the first screen and the second screen are stably supported in the screen box, which limits the first screen and the second screen from shifting and loosening when the screen box vibrates. On the other hand, when the screening requirements of rice crisps change, screen structures with different aperture sizes can be replaced to meet the screening requirements.

[0016] Preferably, the first screen has side baffles protruding upwards on both sides; The connecting assembly includes two support blocks, which are respectively connected to the top sides of the screen box. Each support block is detachably connected to a connecting block. A limiting screw is threaded through the connecting block, and the limiting screw abuts against the side baffle on the side of the first screen.

[0017] By adopting the above technical solution, the first screen and the second screen are fixed by using the limiting screw to tighten the side baffle, thus limiting the displacement of the first screen and the second screen during subsequent screen box vibration; when disassembling and assembling the first screen and the second screen, the first screen and the second screen can be removed from the screen box by removing the limiting screw and the connecting block.

[0018] Preferably, the connecting assembly further includes a connecting rod, the two ends of which are respectively connected to two connecting blocks.

[0019] By adopting the above technical solution, it is beneficial to improve the integration of the two connecting blocks, and the two connecting blocks can be moved synchronously by the connecting rod, which facilitates the disassembly and assembly of the connecting components.

[0020] Preferably, the lifting conveyor is provided with a collection component, which includes a collection cover and a collection tray; The collection cover is installed parallel to the bottom of the inclined conveying section of the lifting conveyor, and the collection cover is used to collect the rice crumbs that fall from the lifting conveyor. The collection cover has an opening at its inclined lower end; the collection tray is located near the inclined lower end of the collection cover and is used to receive the rice crisps emitted from the collection cover.

[0021] By adopting the above technical solution, when the conveyor belt of the lifting conveyor operates below the inclined conveyor section, the falling rice crisps can fall into the collection hood, and then slide into the collection tray through the collection hood for collection, thereby realizing the automatic collection and storage of residual rice crisps.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. After the defective crispy rice rolls are crushed into rice crisps by a double roller crusher, they automatically fall into the sieve box of the screening mechanism. The vibrating drive and the screen structure in the sieve box screen out the oversized rice crisps and the undersized rice crisps. The oversized rice crisps are discharged into the conveying mechanism through the coarse material pipe and then conveyed to the double roller crusher for secondary crushing.

[0023] 2. The feeding funnel and guide plate at the feed inlet of the crusher frame allow the defective crispy rice tubes and oversized rice crisps to fall accurately between the two crushing rollers, which helps the two crushing rollers to better crush the defective crispy rice tubes and oversized rice crisps.

[0024] 3. By installing a collection hood and a collection tray at the bottom of the inclined conveyor section of the lifting conveyor, the rice crisps falling from the conveyor belt of the subsequent lifting conveyor can fall into the collection hood and then slide into the collection tray for collection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the fully automatic integrated crushing, grinding, and screening machine used in this application.

[0026] Figure 2 This is a schematic diagram used in this application to illustrate a double-roll crusher.

[0027] Figure 3 This is a schematic diagram of the internal structure of a double-roller pulverizer used in this application.

[0028] Figure 4 This is a schematic diagram used in this application to illustrate the feed hopper and protective enclosure.

[0029] Figure 5 This is a schematic diagram used in this application to illustrate the screening mechanism.

[0030] Figure 6 This is a schematic diagram of the structure of the screen box used in this application.

[0031] Figure 7 This is a schematic diagram used in this application to illustrate the connection relationship between the first screen and the second screen.

[0032] Figure 8 yes Figure 5 Enlarged schematic diagram of part A in the middle.

[0033] Figure 9This is a schematic diagram illustrating the structure of the conveying mechanism used in this application.

[0034] Figure 10 This is a schematic diagram used in this application to illustrate the structure of the collection cover and the collection tray.

[0035] Explanation of reference numerals in the attached figures: 1. Double roller crusher; 11. Crusher frame; 12. Crusher roller; 13. Crusher drive component; 14. Feed hopper; 141. Guide plate; 142. Rotating shaft; 143. Protrusion; 15. Protective enclosure; 151. Support frame; 152. Enclosure bar; 153. Annular support protrusion; 2. Screening mechanism; 21. Screening frame; 20. Support spring; 22. Screen box; 220. Support protrusion; 221. First screen; 2211. Side baffle; 222 223. Second screen; 224. Support plate; 225. Coarse material pipe; 226. Qualified material pipe; 227. Fine material pipe; 23. Vibration drive component; 24. Connecting assembly; 241. Support block; 242. Clip interface; 243. Connecting block; 244. Limiting screw; 245. Connecting rod; 3. Lifting conveyor; 30. Guide chute; 31. Collection cover; 311. Bottom plate; 312. Side plate; 313. Support frame; 32. Collection tray; 33. Guide pipe. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0037] This application discloses a fully automatic integrated crushing, grinding, and screening machine for food processing, referring to... Figure 1 It includes a crushing mechanism, a screening mechanism 2, and a conveying mechanism; wherein, the crushing mechanism is used to crush the defective crispy tube into rice crisps, the screening mechanism 2 is used to screen the rice crisps crushed by the crushing mechanism to screen out oversized rice crisps, qualified rice crisps, and undersized rice crisps, the screening mechanism 2 is also used to convey oversized rice grains to the conveying mechanism, and the conveying mechanism is used to re-convey the oversized rice crisps to the crushing mechanism for secondary crushing.

[0038] Reference Figure 2 and Figure 3The crushing mechanism includes a double-roller crusher 1. The double-roller crusher 1 includes a crusher frame 11, with an inlet and an outlet at the top and bottom respectively. Two crushing rollers 12 are rotatably connected inside the crusher frame 11. The crushing rollers 12 are made of wear-resistant alloy steel and have several protrusions on their outer periphery to improve the crushing and abrasive effect. The two crushing rollers 12 rotate relative to each other via a gear structure. The crusher frame 11 also includes a crushing drive component 13 for driving the relative rotation of the two crushing rollers 12. Specifically, the crushing drive component 13 includes a crushing motor, which is fixed to the outside of the crusher frame 11. The output end of the crushing motor is connected to one of the two crushing rollers 12. The crushing motor, in conjunction with the gear structure between the two crushing rollers 12, drives the two crushing rollers 12 to rotate relative to each other, thereby crushing and abrasive processing the brittle drum defective product. In actual manufacturing, the double-roller crusher 1 can be an existing adjustable roller gap crusher to adapt to different crushing requirements.

[0039] Reference Figure 3 and Figure 4 A feeding funnel 14 is connected to the top feed inlet of the double-roller crusher 1. The feeding funnel 14 is wider at the top and narrower at the bottom. Two guide plates 141 are supported at the bottom opening of the feeding funnel 14. The two guide plates 141 are located above the two crushing rollers 12 of the double-roller crusher 1. Both guide plates 141 are inclined downwards towards the crushing gap between the two crushing rollers 12, and a gap is left between the two guide plates 141 to allow the crispy rice cakes to pass through. The feeding funnel 14 and the two guide plates 141 work together to guide the crispy rice cakes and rice crisps, so that the crispy rice cakes and rice crisps can fall accurately between the two crushing rollers 12, which can better crush the crispy rice cakes and rice crisps.

[0040] Two guide plates 141 are each welded with a rotating shaft 142 on a side away from each other. The rotating shafts 142 are horizontally positioned, with both ends extending out of the guide plates 141. The ends of the rotating shafts 142 are rotatably connected to the feed funnel 14, and the rotating shafts 142 and the feed funnel 14 are damped together. This allows the guide plates 141 to swing up and down, facilitating the subsequent cleaning of the double-roller crusher 1. The guide plates 141 can be swung upwards to expose the crushing rollers 12. By damping the connection between the ends of the rotating shafts 142 and the feed funnel 14, when the guide plates 141 are swung to clean the crushing rollers 12, the damping connection between the rotating shafts 142 and the feed funnel 14 can temporarily limit the guide plates 141, keeping them at a specific angle to facilitate the cleaning of the crushing rollers 12.

[0041] The inner side of the crusher frame 11 of the double-roll crusher 1 is provided with a limiting block corresponding to the guide plate 141, and the bottom of the guide plate 141 overlaps the corresponding limiting block. The limiting block supports and limits the guide plate 141 to prevent it from swinging downward due to the impact of material during the operation of the double-roll crusher 1, ensuring the stability of the guide plate 141 during the material guiding process, and preventing the guide plate 141 from contacting the crushing roller 12, which could lead to damage to the guide plate 141 and the crushing roller 12.

[0042] The upper surface of the guide plate 141 is welded with protrusions 143. When the operator swings the guide plate 141, he / she can swing the guide plate 141 by holding the protrusions 143. The operator can swing the guide plate 141 directly through the protrusions 143 without having to contact the area of ​​the guide plate 141 near the crushing roller 12, which improves the convenience of operation and reduces the safety hazards during operation.

[0043] A protective barrier 15 is provided at the top opening of the feed hopper 14, covering the top opening of the feed hopper 14. The protective barrier 15 includes a support frame 151, within which several barrier rods 152 are horizontally welded, arranged parallel to each other. A material passage gap is provided between adjacent barrier rods 152 for the passage of defective crispy rice products and oversized rice crisps. When the double-roller crusher 1 is running, the protective barrier 15 can be used to restrict operator access to the crushing rollers 12 of the crusher, thereby improving the safety performance of the equipment.

[0044] An annular support protrusion 153 is welded to the inner circumference of the top opening end of the feed funnel 14, corresponding to the protective enclosure 15. The support frame 151 of the protective enclosure 15 overlaps the annular support protrusion 153. The annular support protrusion 153 is used to support and limit the support frame 151, so that the protective enclosure 15 is stably supported at the opening end of the feed funnel 14.

[0045] Reference Figure 1 and Figure 5 The screening mechanism 2 includes a screening frame 21, a screen box 22, and a vibration drive component 23. The screen box 22 is inclinedly supported on the screening frame 21 by several support springs 20. The top of the screen box 22 is open, and the inclined upper end of the screen box 22 extends to below the discharge port at the bottom of the crusher frame 11 to receive rice crisps discharged through the discharge port of the double roller crusher 1. The vibration drive component 23 is used to drive the screen box 22 to vibrate.

[0046] Reference Figure 5 and Figure 6The inner cavity of the sieve box 22 is supported by a first screen 221 and a second screen 222 in parallel. The first screen 221 is located above the second screen 222, and the mesh size of the first screen 221 is larger than that of the second screen 222. The first screen 221 and the second screen 222 are used to remove oversized rice crisps and qualified rice crisps, respectively. The first screen 221 and the second screen 222 work together to divide the inner cavity of the sieve box 22 into a coarse material cavity, a qualified material cavity, and a fine material cavity. The inclined lower end of the sieve box 22 is connected to a coarse material pipe 224, a qualified material pipe 225, and a fine material pipe 226, respectively; the coarse material pipe 224, the qualified material pipe 225, and the fine material pipe 226 communicate with the coarse material cavity, the qualified material cavity, and the fine material cavity, respectively.

[0047] The vibration drive component 23 specifically adopts an attached vibration motor, which is installed on the outside of the sieve box 22. During the screening of rice crisps, the vibration motor drives the sieve box 22 to vibrate, causing the rice crisps to move towards the inclined lower end of the sieve box 22. The first screen 221 and the second screen 222 intercept oversized rice crisps and qualified rice crisps, while oversized rice crisps fall into the fine crushing chamber at the bottom of the sieve box 22. This achieves the screening of rice crisps at different grades. When the screened rice crisps move to the inclined end of the sieve box 22, they are discharged from the sieve box 22 through the coarse material pipe 224, the qualified material pipe 225, and the fine material pipe 226, respectively.

[0048] Reference Figure 6 and Figure 7 The first screen 221 and the second screen 222 are connected on their adjacent sides by two support plates 223. Supporting ribs 220 protrude from opposite sides of the inner cavity of the screen box 22, and the bottom of the second screen 222 rests on the two supporting ribs 220. The screen box 22 is equipped with a connecting component 24, which works with the supporting ribs 220 to connect and limit the connection between the first screen 221 and the second screen 222. Through these features, the first screen 221 and the second screen 222 are securely supported within the screen box 22. Furthermore, when screening requirements change, the first screen 221 and the second screen 222 can be removed from the screen box 22 to replace them with a suitable screen structure.

[0049] Side baffles 2211 are welded vertically upward on both sides of the first screen 221. The side baffles 2211 are used to restrict the rice crisps that move along the first screen 221 from falling off from both sides of the first screen 221.

[0050] Two connecting components 24 are provided, and the two connecting components 24 are evenly distributed along the length of the screen box 22. Specifically, the connecting components 24 include two support blocks 241 and two connecting blocks 243. The two support blocks 241 are respectively welded to the top two sides of the screen box 22. The side of the support block 241 has a locking interface 242 corresponding to the connecting block 243. The connecting block 243 is embedded in the locking interface 242 of the corresponding support block 241. The locking interface 242 is used to limit the connecting block 243 to prevent the connecting block 243 from displacing and falling off during vibration. Each connecting block 243 is vertically threaded with a limiting screw 244. The limiting screw 244 is positioned opposite to the side baffle 2211 on the side of the first screen 221, with the bottom end of the limiting screw 244 abutting against the corresponding side baffle 2211. This, in conjunction with the support protrusion 220 inside the screen box 22, presses and limits the first screen 221 and the second screen 222, preventing relative movement between the first screen 221 and the second screen 222 and the screen box 22 during subsequent vibrations, which would affect the screening effect on rice crisps. When it is necessary to disassemble the first screen 221 and the second screen 222, simply loosen the limiting screw 244 and remove the connecting block 243 from the locking interface 242 of the support block 241 to release the limitation on the first screen 221 and the second screen 222.

[0051] A connecting rod 245 is also provided between the two connecting blocks 243. The connecting rod 245 is welded and fixed to the two connecting blocks 243 respectively. The connecting rod 245 improves the connection integrity between the two connecting blocks 243 of the connecting assembly 24, so as to better compress and limit the screen structure in conjunction with the limiting screw 244. At the same time, it facilitates the synchronous movement of the two connecting blocks 243 via the connecting rod 245.

[0052] Reference Figure 1 and Figure 9 The input and output ends of the conveying mechanism are respectively connected to the coarse material pipe 224 of the screen box 22 and the feed port of the double roller crusher 1, and are used to convey the oversized rice crisps discharged from the coarse material pipe 224 to the double roller crusher 1 for secondary crushing.

[0053] Reference Figure 9 and Figure 10 Specifically, the conveying mechanism includes a lifting conveyor 3, which comprises a horizontal conveying section and an inclined conveying section. In other embodiments, the lifting conveyor 3 may be replaced by a screw conveyor.

[0054] A guide chute 30 is provided at the output end of the inclined conveying section of the lifting conveyor 3. The guide chute 30 is welded to the frame of the lifting conveyor 3 by a connector. The guide chute 30 is located below the output end of the inclined conveying section and extends downward at an inclination to above the feed funnel 14 at the feed inlet of the crusher frame 11. After the overcooked rice brittle conveyed by the lifting conveyor 3 falls into the guide chute 30, it slides into the double roller crusher 1 for secondary crushing.

[0055] A collection assembly is provided at the bottom of the inclined conveying section of the lifting conveyor 3. The collection assembly includes a collection cover 31 and a collection tray 32. The collection cover 31 is parallel to the bottom of the inclined conveying section of the lifting conveyor 3 and is used to collect rice crisps that fall from the conveyor belt of the lifting conveyor 3. The lower inclined end of the collection cover 31 is open; the collection tray 32 is close to the lower inclined end of the collection cover 31 and is used to collect rice crisps discharged from the lower inclined end of the collection cover 31.

[0056] Specifically, the collection hood 31 includes a base plate 311, with side plates 312 vertically connected to both sides of the base plate 311. The side plates 312 and the base plate 311 are integrally formed using a bending process. Both side plates 312 are fixed to both sides of the lifting conveyor 3 frame using several bolts, achieving a stable connection between the collection hood 31 and the lifting conveyor 3. A gap is left between the base plate 311 and the lifting conveyor 3.

[0057] A support frame 313 is welded to the bottom of the collection cover 31. The support frame 313 is used to support the collection cover 31 and the lifting conveyor 3.

[0058] The horizontal conveying section of the lifting conveyor 3 is supported by a guide pipe 33, with the bottom end of the guide pipe 33 positioned close to the horizontal conveying section. The end of the coarse material pipe 224 furthest from the screen box 22 extends downwards at an angle above the guide pipe 33. Excess rice crisps discharged from the coarse material pipe 224 can then fall through the guide pipe 33 into the horizontal conveying section of the lifting conveyor 3, where they are further conveyed. The guide pipe 33 facilitates the concentrated falling of excessive rice crisps into the lifting conveyor 3.

[0059] The implementation principle of this application embodiment is as follows: The defective crispy rice rolls are fed into the double-roller crusher 1 via the feed funnel 14, where they are crushed to form rice crisps. The crushed rice crisps are discharged into the sieve box 22 of the screening mechanism 2 through the bottom outlet of the double-roller crusher 1. The vibrating drive 23, in conjunction with the screen structure inside the sieve box 22, screens out oversized rice crisps, qualified rice crisps, and undersized rice crisps. Qualified rice crisps and undersized rice crisps are discharged from the sieve box 22 via the qualified material pipe 225 and the fine material pipe 226, respectively. Oversized rice crisps are discharged into the lifting conveyor 3 via the coarse material pipe 224 and then fed back into the double-roller crusher 1 for secondary crushing. No manual intervention is required during the rice crisp production process, effectively improving the production efficiency.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fully automatic integrated crushing, grinding, and screening machine for food processing, characterized in that: It includes a crushing mechanism, a screening mechanism (2), and a conveying mechanism; The crushing mechanism includes a double-roll crusher (1); the double-roll crusher (1) is used to crush substandard crispy rice products and excessively large crispy rice products; The screening mechanism (2) includes a screening frame (21), a screen box (22), and a vibration drive component (23); the screen box (22) is inclinedly supported on the screening frame (21); the top of the screen box (22) is open; the upper end of the screen box (22) extends to below the discharge port of the double roller crusher (1); a first screen (221) and a second screen (222) are parallelly supported in the inner cavity of the screen box (22); the first screen (221) and the second screen (222) are respectively used to screen out oversized rice crisps and qualified rice crisps. The first screen (221) and the second screen (222) cooperate to divide the inner cavity of the screen box (22) into a coarse material cavity, a qualified material cavity, and a fine material cavity; the lower inclined end of the screen box (22) is connected to a coarse material pipe (224), a qualified material pipe (225), and a fine material pipe (226); the coarse material pipe (224), the qualified material pipe (225), and the fine material pipe (226) are respectively connected to the coarse material cavity, the qualified material cavity, and the fine material cavity; the vibration drive (23) is used to drive the screen box (22) to vibrate; The input and output ends of the conveying mechanism are respectively connected to the coarse material pipe (224) and the double roller crusher (1). The conveying mechanism is used to convey the oversized rice crisps discharged from the coarse material pipe (224) to the double roller crusher (1) for secondary crushing.

2. The full-automatic grinding, screening and sieving integrated machine for food processing according to claim 1, characterized in that: The conveying mechanism includes a lifting conveyor (3), which includes a horizontal conveying section and an inclined conveying section; the coarse material pipe (224) extends downward at an incline above the horizontal conveying section of the lifting conveyor (3); the output end of the inclined conveying section of the lifting conveyor (3) is supported by a guide chute (30), which extends downward at an incline above the feed inlet of the double roller crusher (1).

3. The fully automatic integrated crushing, grinding, and screening machine for food processing according to claim 1, characterized in that: The feed inlet of the double roller crusher (1) is connected to a feed funnel (14), which is wider at the top and narrower at the bottom; a protective barrier (15) is provided at the top opening of the feed funnel (14), which covers the top opening of the feed funnel (14). The protective enclosure (15) includes a support frame (151), and several enclosure rods (152) are horizontally connected inside the support frame (151). A feeding gap is left between adjacent enclosure rods (152), and the feeding gap is used for the crispy rice tube and excessively large-diameter rice crisps to pass through.

4. The full-automatic grinding, screening and sieving integrated machine for food processing according to claim 3, characterized in that: The bottom opening of the feed hopper (14) is supported by two guide plates (141), which are located above the two crushing rollers (12) of the double roller crusher (1). Both guide plates (141) are inclined downward toward the crushing gap between the two crushing rollers (12), and a material passage gap is left between the two guide plates (141).

5. The full-automatic grinding, screening and sieving integrated machine for food processing according to claim 4, characterized in that: The first screen (221) and the second screen (222) are connected by a support plate (223); The inner cavity of the sieve box (22) is provided with supporting protrusions (220) on opposite sides, and the bottom of the second sieve (222) overlaps on the two supporting protrusions (220); The sieve box (22) is provided with a connecting component (24), which is used to cooperate with the supporting protrusion (220) to connect and limit the first sieve (221) and the second sieve (222).

6. The fully automatic integrated crushing, grinding, and screening machine for food processing according to claim 5, characterized in that: The first screen (221) has side baffles (2211) protruding upwards on both sides; The connecting assembly (24) includes two support blocks (241), which are respectively connected to the top sides of the screen box (22). Each support block (241) is detachably connected to a connecting block (243). A limiting screw (244) is threaded through the connecting block (243), and the limiting screw (244) abuts against the side baffle (2211) on the side of the first screen (221).

7. The fully automatic integrated crushing, grinding, and screening machine for food processing according to claim 6, characterized in that: The connecting assembly (24) further includes a connecting rod (245), the two ends of which are respectively connected to two connecting blocks (243).

8. The full-automatic grinding, screening and sorting integrated machine for food processing according to claim 2, characterized in that: The lifting conveyor (3) is equipped with a collection component, which includes a collection cover (31) and a collection tray (32); The collection cover (31) is parallel to the bottom of the inclined conveying section of the lifting conveyor (3), and the collection cover (31) is used to collect the rice crisps that fall from the lifting conveyor (3); The collecting cover (31) has an opening at its inclined lower end; the collecting tray (32) is located near the inclined lower end of the collecting cover (31) and is used to receive the rice crisps transmitted from the collecting cover (31).

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