Double-screw-rod puffing equipment for bean production

Abstract

The invention provides double-screw-rod puffing equipment for bean production, and relates to the technical field of double-screw-rod puffing equipment.The double-screw-rod puffing equipment comprises a double-screw-rod puffing equipment body, a first pretreatment box is fixedly installed at the upper end of the double-screw-rod puffing equipment body, and a screening cavity and a softening cavity are formed in the first pretreatment box; and a multifunctional structure is symmetrically and rotationally installed between the screening cavity and the softening cavity, the multifunctional structure comprises first transmission rollers, and the two first transmission rollers are rotationally installed on the partition plate. According to the double-screw-rod puffing equipment disclosed by the invention, the functions of double crushing, screening, blockage prevention and circular damage on beans can be completed by starting a brushless motor to respectively perform forward rotation and reverse rotation by a worker, so that the effect of multiple functions is realized, and meanwhile, the operation is completed by utilizing the brushless motor to drive two screw rods in the double-screw-rod puffing equipment body to rotate. And the energy-saving performance and the practicability of the whole device can be further improved.

Description

Technical Field

[0001] This invention belongs to the technical field of twin-helix extrusion equipment, and more specifically, relates to a twin-helix extrusion equipment for bean production. Background Technology

[0002] A twin-screw extruder is a mechanical device that uses two intermeshing screws to extrude, shear, and heat beans, causing them to puff up. Its core principle is that the beans move forward under the counter-rotation of the twin screws, and are subjected to shearing and extrusion forces from the screws. At the same time, the beans are heated by external heating or friction, causing the starch to gelatinize or the protein to denature. Finally, when the beans are extruded through a die under high pressure, the water evaporates rapidly due to the sudden drop in pressure, forming a loose and porous puffed structure.

[0003] Currently, existing devices (such as announcement number: CN110723481B) disclose a twin-screw extrusion device. This device sets up a twin-screw structure. When the third screw is connected between the first connecting rod and the second connecting rod, the first screw and the second screw rotate simultaneously. The propeller on the third screw moves eccentrically. When the propeller on one side is tangent to the connecting sleeve on the other side, the propellers mesh, which is a partial mesh. At the same time, the tangential action can also achieve a self-cleaning function during operation to avoid material accumulation.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were found: When the device is in use, its feeding system lacks a pre-crushing function, which makes it difficult to accurately control the particle size (mesh count) of the bean raw materials. Due to the special nature of bean materials, the particle size difference is large when the material enters the puffing chamber. In the subsequent high-temperature extrusion process, the uneven heating surface area causes problems such as insufficient local cooking and poor consistency of puffing structure, which affect the quality of the finished product and thermal efficiency. The practicality is insufficient and needs to be improved. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a twin-screw extrusion device for soybean production.

[0006] A double-screw extrusion device for soybean production includes a double-screw extrusion device body. A first pretreatment box is fixedly installed at the upper end of the double-screw extrusion device body. The first pretreatment box is provided with a screening chamber and a softening chamber. A partition is fixedly installed between the screening chamber and the softening chamber. A discharge port is opened inside the screening chamber.

[0007] A multi-functional structure is symmetrically rotated between the screening chamber and the softening chamber;

[0008] The multifunctional structure includes a first drive roller, two of which are rotatably mounted with a partition. Both first drive rollers are partially exposed outside the first pretreatment box. A first crushing roller sleeve is fixedly mounted on the circumferential surface of each of the two first drive rollers. Both first crushing roller sleeves are located inside the screening chamber. A second pretreatment box is fixedly mounted on the upper end of the first pretreatment box. The second pretreatment box is located above the screening chamber. Second drive rollers are symmetrically rotatably mounted inside the second pretreatment box. Both second drive rollers are partially exposed outside the second pretreatment box. A second crushing roller sleeve is provided on the circumferential surface of each of the two second drive rollers. Both second crushing roller sleeves are located inside the second pretreatment box.

[0009] Preferably, a first guide plate is symmetrically fixedly installed inside the screening chamber, with both first guide plates located above the first drive roller. A second guide plate is symmetrically fixedly installed inside the second pretreatment box, with both second guide plates located above the second crushing roller sleeve. A screen is provided inside the screening chamber, located between the discharge port and the first crushing roller sleeve. A rotating shaft is fixedly installed on the frame of the screen, rotatably mounted to the inner wall of the screening chamber. Cylindrical return springs are symmetrically fixedly installed between the frame of the screen and the partition. A storage groove is symmetrically opened inside the partition. Toothed impact members are fixedly installed on the circumferential surfaces of both first drive rollers, located inside the storage grooves and partially exposed outside the storage grooves. Both toothed impact members are adapted to the frame of the screen. An inclined surface is provided at the bottom of the softening chamber, and a stretched heat-resistant diaphragm cloth is fixedly installed between the inclined surface and the frame of the screen. A baffle is fixedly installed on the side wall of the partition away from the screen.

[0010] Preferably, a discharge funnel is provided on the side wall of the first pretreatment box, the softening chamber is connected to the discharge funnel, a pneumatic bean conveyor is fixedly installed on the upper end of the double helix puffing equipment body, the feed pipe of the pneumatic bean conveyor is fixedly installed to the discharge funnel, the discharge pipe of the pneumatic bean conveyor is fixedly installed to the second pretreatment box, the pneumatic bean conveyor can transport the beans discharged from the discharge funnel to the inside of the second pretreatment box, and an inlet is opened inside the double helix puffing equipment body, the inlet and the outlet are connected.

[0011] Preferably, both the partition and the sidewall of the softening chamber are provided with sliding grooves, and sliders are slidably installed inside the two sliding grooves. Supports are fixedly installed on the sidewalls of the two sliders, a rack is fixedly installed between the two supports, and a sweeping brush is fixedly installed between the two supports. The sweeping brush is located below the first transmission roller and is parallel to the inclined plane.

[0012] Preferably, a first missing gear and a second missing gear are fixedly installed on the circumferential surfaces of the two first transmission rollers, respectively. The first missing gear and the second missing gear are both meshed with the rack. The first missing gear and the second missing gear are both located inside the softening cavity. Steam ejectors are symmetrically provided on the sidewalls of the two softening cavities, and the nozzles of the two steam ejectors are both facing the inclined plane.

[0013] Preferably, brushless motors are symmetrically arranged on the side wall of the double-spiral extruder body. A first pulley is fixedly installed on the output shaft of each of the two brushless motors. A second pulley is fixedly installed on the circumferential surface of each of the two first transmission rollers. A first synchronous belt is wound between the two first pulleys and the second pulleys. A third pulley is fixedly installed on the circumferential surface of each of the two first transmission rollers. The two second pulleys and the third pulleys are located outside the first pretreatment box. A fourth pulley is fixedly installed on the circumferential surface of each of the two second transmission rollers. A second synchronous belt is wound between the two third pulleys and the fourth pulley.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In this invention, by setting up a multi-functional structure, workers can pour beans into the second pre-treatment box. The beans are then guided evenly between the second drive rollers by the second guide plate and ground and crushed by the second drive rollers. After the initial crushing, the beans fall into the first pre-treatment box and are guided by the first guide plate to fall between the first crushing roller sleeves for secondary crushing. The initial crushing quickly processes large pieces of raw material, while the secondary crushing finely pulverizes hard beans such as soybeans, so that the beans reach the ideal particle size required for puffing, improving the subsequent puffing effect and avoiding the problem of overloading or uneven particle size caused by one-time crushing, which affects the subsequent puffing effect.

[0016] In this invention, by setting up a multi-functional structure, when the first transmission roller rotates, it will drive the toothed impactor to rotate, thereby causing the toothed impactor to periodically impact the frame of the screen. Through the flexible connection of the cylindrical return spring and the rotation limit of the rotating shaft on the screen, it is possible to prevent unqualified beans after crushing from falling directly into the discharge port and entering the body of the double helix puffing equipment for processing. At the same time, it can also prevent blockage. Furthermore, by tilting the screen towards the softening chamber side through the flexible connection of the cylindrical return spring, unqualified beans can be discharged into the softening chamber for convenient subsequent processing.

[0017] In this invention, by setting a stretchable heat-resistant diaphragm cloth between the screens on the inclined surface, the possibility of unqualified beans entering the discharge port after crushing can be further blocked without affecting the vibration of the screen. At the same time, by setting a baffle, the beans discharged from the screen can be limited, so that the beans fall on the inclined surface and avoid falling onto the sweeping brush, thereby improving the processing effect.

[0018] In this invention, a pneumatic bean conveyor is installed at the top, and the feed pipe of the pneumatic bean conveyor is connected to the discharge funnel, and the discharge pipe is connected to the second pretreatment box. After the unqualified beans in the softening chamber are softened by steam, they are discharged through the discharge funnel and automatically transported by the pneumatic bean conveyor to the second pretreatment box for crushing and screening again, forming a cyclic processing flow of "pretreatment, screening, softening, and re-pretreatment", which significantly reduces raw material waste and improves the yield.

[0019] In this invention, by setting up a first synchronous belt and a second synchronous belt and a pneumatic bean conveyor, the operator only needs to turn on the brushless motor to rotate it forward and reverse to complete the functions of dual crushing, screening, anti-clogging and circulating damage of beans, thereby achieving a multi-functional effect. At the same time, by using the power of the brushless motor to drive the two spiral rods inside the double spiral rod puffing equipment to rotate, the overall energy efficiency of the device can be further improved.

[0020] In this invention, by setting a multifunctional structure, the rotation of the first transmission roller will drive the first missing gear and the second missing gear to rotate in different directions, so that the first missing gear and the second missing gear mesh with the rack respectively, so that the rack drives the slider on the support to slide back and forth along the path of the slide groove. The support will drive the sweeping brush to sweep back and forth in the inclined plane, so that the unqualified beans are continuously turned over and flattened in the action area of ​​the steam injector, avoiding the accumulation or clumping of beans, ensuring that the steam is in full contact with the surface of the beans, promoting the appropriate denaturation of protein and uniform gelatinization of starch, and avoiding local overheating or insufficient softening. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional connected exploded structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the exploded connection structure of the first pretreatment box of the present invention;

[0024] Figure 4 This is the present invention. Figure 3 Enlarged view of the structure at point A in the image;

[0025] Figure 5 This is a cross-sectional view of the second pretreatment box of the present invention;

[0026] Figure 6 This is a cross-sectional view of the first pretreatment box of the present invention;

[0027] Figure 7 This is a schematic diagram of the exploded connection structure of the steam ejector of the present invention;

[0028] Figure 8 This is a cross-sectional view of the partition of the present invention;

[0029] Figure 9 This is the present invention. Figure 8 Enlarged view of the structure at point B in the image;

[0030] Figure 10 This is a cross-sectional view of the discharge port of the present invention;

[0031] Figure 11 This is the present invention. Figure 10 Enlarged view of the structure at point C in the image;

[0032] Figure 12 This is a schematic diagram of the exploded connection structure of the first pretreatment box of the present invention;

[0033] Figure 13 This is a schematic diagram of the exploded structure of the sweeping brush connection of the present invention.

[0034] In the diagram, the correspondence between the component names and the attached drawing numbers is as follows: 11. Double-helix extruder body; 12. First pretreatment box; 13. Screening chamber; 14. Softening chamber; 15. First drive roller; 16. First crushing roller sleeve; 17. Second pretreatment box; 18. Second drive roller; 19. Second crushing roller sleeve; 21. First guide plate; 22. Second guide plate; 23. Brushless motor; 24. First pulley; 25. Second pulley; 26. First synchronous belt; 27. Third pulley; 28. Fourth pulley 29. Second synchronous belt; 31. Discharge port; 32. Screen; 33. Rotating shaft; 34. Cylindrical return spring; 35. Partition plate; 36. Storage trough; 37. Toothed impactor; 38. Inclined surface; 39. Stretchable heat-resistant diaphragm cloth; 41. Baffle plate; 42. Discharge funnel; 43. Pneumatic bean conveyor; 44. Inlet; 45. Chute; 46. Sliding block; 47. Support; 48. Rack; 49. Sweeping brush; 51. First missing gear; 52. Second missing gear; 53. Steam ejector. Detailed Implementation

[0035] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0036] Please see Figure 1 - Figure 13This invention provides a double-screw extrusion device for soybean production, including a double-screw extrusion device body 11. The upper end of the double-screw extrusion device body 11 (which mainly consists of a feeding system, a double screw mechanism, a temperature control system, a mold, and a cutting device) is fixedly installed with a first pretreatment box 12. The first pretreatment box 12 is provided with a screening chamber 13 and a softening chamber 14. A partition 35 is fixedly installed between the screening chamber 13 and the softening chamber 14. The screening chamber 13 is provided with a discharge port 31.

[0037] A multi-functional structure is symmetrically rotated between the screening chamber 13 and the softening chamber 14;

[0038] The multifunctional structure includes two first drive rollers 15, both of which are rotatably mounted to the partition plate 35. Both first drive rollers 15 are partially exposed outside the first pretreatment box 12. First crushing roller sleeves 16 are fixedly mounted on the circumferential surface of each of the two first drive rollers 15, and both first crushing roller sleeves 16 are located inside the screening chamber 13. A second pretreatment box 17 is fixedly mounted on the upper end of the first pretreatment box 12, located above the screening chamber 13. A second crushing roller sleeve 16 is symmetrically rotatably mounted inside the second pretreatment box 17. The transmission roller 18 and the two second transmission rollers 18 are partially exposed outside the second pretreatment box 17. The circumferential surface of the two second transmission rollers 18 is provided with a second crushing roller sleeve 19. The two second crushing roller sleeves 19 are located inside the second pretreatment box 17. The screening chamber 13 is symmetrically fixedly installed with first guide plates 21. The two first guide plates 21 are located above the first transmission roller 15. The second pretreatment box 17 is symmetrically fixedly installed with second guide plates 22. The two second guide plates 22 are located above the second crushing roller sleeves 19.

[0039] By setting up a multi-functional structure, workers can pour beans into the second pre-treatment box 17. The beans will be evenly guided between the second drive rollers 18 by the second guide plate 22 and ground and crushed by the second drive rollers 18. The beans after the initial crushing will fall into the first pre-treatment box 12 and be guided by the first guide plate 21. The beans will then fall between the first crushing roller sleeves 16 for secondary crushing. The initial crushing quickly processes large pieces of raw materials, while the secondary crushing finely grinds hard beans such as soybeans, so that the beans reach the ideal particle size required for puffing, improving the subsequent puffing effect and avoiding the problem of overloading or uneven particle size caused by one-time crushing, which affects the subsequent puffing effect.

[0040] A screen 32 is provided inside the screening chamber 13. The screen 32 is located between the discharge port 31 and the first crushing roller sleeve 16. A rotating shaft 33 is fixedly installed on the frame of the screen 32. The rotating shaft 33 is rotatably installed with the inner wall of the screening chamber 13. Cylindrical return springs 34 are symmetrically fixedly installed between the frame of the screen 32 and the partition plate 35. A storage groove 36 is symmetrically opened inside the partition plate 35. Toothed impact members 37 are fixedly installed on the circumferential surface of the two first transmission rollers 15. Both toothed impact members 37 are located inside the storage groove 36. Both toothed impact members 37 are partially exposed outside the storage groove 36. Both toothed impact members 37 are adapted to the frame of the screen 32.

[0041] By setting up a multi-functional structure, when the first drive roller 15 rotates, it will drive the toothed impact member 37 to rotate, so that the toothed impact member 37 will periodically impact the frame of the screen 32. Through the flexible connection of the cylindrical return spring 34 and the rotation limit of the rotating shaft 33 on the screen 32, it can prevent unqualified beans after crushing from falling directly into the discharge port 31 and entering the double screw puffing equipment body 11 for processing. At the same time, it can also prevent blockage. Furthermore, by tilting the screen 32 towards the softening chamber 14 through the flexible connection of the cylindrical return spring 34, unqualified beans can be discharged into the softening chamber 14 for convenient subsequent processing.

[0042] The bottom of the softening chamber 14 is provided with an inclined surface 38. A stretchable heat-resistant diaphragm cloth 39 is fixedly installed between the inclined surface 38 and the frame of the screen 32. A baffle 41 is fixedly installed on the side wall of the partition 35 away from the screen 32.

[0043] By setting a stretchable heat-resistant diaphragm cloth 39 between the inclined plane 38 and the screen 32, the possibility of unqualified beans entering the discharge port 31 after crushing can be further blocked without affecting the vibration of the screen 32. At the same time, by setting a baffle 41, the beans discharged from the screen 32 can be limited, so that the beans fall on the inclined plane 38 and avoid falling on the sweeping brush 49, thereby improving the processing effect.

[0044] The first pretreatment box 12 has a discharge funnel 42 on its side wall. The softening chamber 14 is connected to the discharge funnel 42. The upper end of the double helix puffing equipment body 11 is fixedly installed with a pneumatic bean conveyor 43 (the pneumatic bean conveyor 43 is an automated device that uses airflow to convey bean materials. Its core principle is to generate power through airflow in a closed pipe to push or suck bean particles to complete directional movement). The feed pipe of the pneumatic bean conveyor 43 is fixedly installed with the discharge funnel 42. The discharge pipe of the pneumatic bean conveyor 43 is fixedly installed with the second pretreatment box 17. The pneumatic bean conveyor 43 can transport the beans discharged from the discharge funnel 42 to the inside of the second pretreatment box 17. The double helix puffing equipment body 11 has a feed inlet 44 inside, which is connected to the discharge outlet 31.

[0045] By setting up a pneumatic bean conveyor 43, connecting the feed pipe of the pneumatic bean conveyor 43 to the discharge funnel 42, and connecting the discharge pipe to the second pretreatment box 17, the unqualified beans softened by steam in the softening chamber 14 are discharged through the discharge funnel 42 and automatically transported by the pneumatic bean conveyor 43 to the second pretreatment box 17 for re-crushing and screening, forming a cyclic processing flow of "pretreatment, screening, softening, and re-pretreatment", which significantly reduces raw material waste and improves the yield.

[0046] Both the partition plate 35 and the softening chamber 14 have grooves 45 on their side walls. Slider 46 is slidably installed inside each groove 45. Supports 47 are fixedly installed on the side walls of each slider 46. A rack 48 is fixedly installed between the two supports 47. A sweeping brush 49 is fixedly installed between the two supports 47. The sweeping brush 49 is located below the first transmission roller 15 and is parallel to the inclined plane 38. A first missing gear 51 and a second missing gear 52 are fixedly installed on the circumferential surfaces of the two first transmission rollers 15, respectively. Both the first missing gear 51 and the second missing gear 52 are meshed with the rack 48. Both the first missing gear 51 and the second missing gear 52 are located inside the softening chamber 14. Steam ejectors 53 are symmetrically provided on the side walls of the two softening chambers 14. The nozzles of both steam ejectors 53 (a steam ejector 53 is a device that uses high-pressure steam as a power source or heat source) face the inclined plane 38.

[0047] By setting up a multi-functional structure, the rotation of the first transmission roller 15 will drive the first missing gear 51 and the second missing gear 52 to rotate in different directions, so that the first missing gear 51 and the second missing gear 52 mesh with the rack 48 respectively, so that the rack 48 drives the slider 46 on the bracket 47 to slide back and forth along the path of the slide groove 45. The bracket 47 will drive the sweeping brush 49 to sweep back and forth in the inclined plane 38, so that the unqualified beans are continuously turned over and flattened in the action area of ​​the steam injector 53, avoiding the accumulation or clumping of beans, ensuring that the steam is in full contact with the surface of the beans, promoting the appropriate denaturation of protein and uniform gelatinization of starch, and avoiding local overheating or insufficient softening.

[0048] The double helix extruder body 11 is symmetrically provided with brushless motors 23 on its side wall. The output shafts of the two brushless motors 23 are each fixedly mounted with a first pulley 24. The circumferential surfaces of the two first transmission rollers 15 are each fixedly mounted with a second pulley 25. A first synchronous belt 26 is wound between the two first pulleys 24 and the second pulleys 25. The circumferential surfaces of the two first transmission rollers 15 are each fixedly mounted with a third pulley 27. The two second pulleys 25 and the third pulley 27 are all located outside the first pretreatment box 12. The circumferential surfaces of the two second transmission rollers 18 are each fixedly mounted with a fourth pulley 28. A second synchronous belt 29 is wound between the two third pulleys 27 and the fourth pulley 28.

[0049] By setting up a first synchronous belt 26, a second synchronous belt 29, and a pneumatic bean conveyor 43, the operator only needs to turn on the brushless motor 23 to rotate it forward and reverse to complete the functions of dual crushing, screening, anti-clogging, and circulating damage of beans, thereby achieving a multi-functional effect. At the same time, by using the power of the brushless motor 23 to drive the two spiral rods inside the double spiral extrusion equipment body 11 to rotate, the overall energy efficiency of the device can be further improved.

[0050] Working principle:

[0051] In the first step, when using the device, the operator can first turn on the brushless motor 23 to rotate forward and reverse, and connect the steam injector 53 to the external steam supply unit. The rotation of the brushless motor 23 will drive the two spiral rods inside the double spiral extrusion device body 11 to rotate forward and reverse. At the same time, the output shaft of the brushless motor 23 will drive the first transmission roller 15 to rotate through the first synchronous belt 26. The rotation of the first transmission roller 15 will drive the two second transmission rollers 18 to rotate synchronously through the second synchronous belt 29.

[0052] The second step involves the worker pouring the beans into the second pretreatment box 17 and guiding them through the second guide plate 22. The beans will then be evenly guided between the second drive rollers 18 and ground and crushed by the second drive rollers 18. The beans that have been crushed will fall into the first pretreatment box 12 and be guided by the first guide plate 21. The beans will then fall between the first crushing roller sleeves 16 for secondary crushing. The crushed beans will then fall onto the surface of the screen 32.

[0053] Thirdly, when the first drive roller 15 rotates, it will drive the toothed impact member 37 to rotate, causing the toothed impact member 37 to impact the frame of the screen 32. Through the flexible connection of the cylindrical return spring 34 and the rotational installation of the rotating shaft 33 on the screen 32 with the screening chamber 13, the screen 32 will vibrate around the rotating shaft 33 to a certain amplitude. This allows beans of the appropriate size to pass through the screen 32 and the discharge port 31 into the feed port 44, facilitating the double-spiral expansion device. The main body 11 puffs the beans. Meanwhile, unqualified beans will accumulate on the screen 32. With the shaking of the screen 32, the beans will be discharged from the screen 32 towards the side closer to the softening chamber 14. The beans will enter the softening chamber 14. The stretchable heat-resistant diaphragm cloth 39 can prevent unqualified beans from entering the discharge port 31. At the same time, the baffle 41 will limit the beans discharged from the screen 32, so that the beans fall on the inclined surface 38 and prevent them from falling onto the sweeping brush 49.

[0054] In the fourth step, when the first drive roller 15 rotates, the rotation of the first drive roller 15 will drive the first missing gear 51 and the second missing gear 52 to rotate in different directions, so that the first missing gear 51 and the second missing gear 52 mesh with the rack 48 respectively, so that the rack 48 drives the slider 46 on the support 47 to slide back and forth along the path of the slide groove 45. The support 47 will drive the sweeping brush 49 to sweep the beans inside the inclined surface 38, so that the steam ejected by the steam injector 53 can fully denature the protein of the unqualified beans and gelatinize the starch, making the beans soft as a whole, and finally discharged through the discharge funnel 42, so that the softened beans are transported by the discharge funnel 42 to the second pretreatment box 17 for crushing and screening again.

[0055] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A double-helix puffing device for soybean production, comprising a double-helix puffing device body (11), wherein a first pretreatment box (12) is fixedly installed at the upper end of the double-helix puffing device body (11), characterized in that: The first pretreatment box (12) is provided with a screening chamber (13) and a softening chamber (14). A partition (35) is fixedly installed between the screening chamber (13) and the softening chamber (14). A discharge port (31) is opened inside the screening chamber (13). A multi-functional structure is symmetrically rotated between the screening chamber (13) and the softening chamber (14); The multifunctional structure includes a first drive roller (15), two first drive rollers (15) are rotatably mounted with a partition (35), and a first crushing roller sleeve (16) is fixedly mounted on the circumferential surface of the two first drive rollers (15). The two first crushing roller sleeves (16) are located inside the screening chamber (13). A second pretreatment box (17) is fixedly mounted on the upper end of the first pretreatment box (12). A second drive roller (18) is symmetrically rotatably mounted inside the second pretreatment box (17). A second crushing roller sleeve (19) is provided on the circumferential surface of the two second drive rollers (18). The two second crushing roller sleeves (19) are located inside the second pretreatment box (17).

2. The twin-screw extruder for bean production as described in claim 1, characterized in that, The screening chamber (13) is symmetrically fixedly installed with a first guide plate (21), and the second pretreatment box (17) is symmetrically fixedly installed with a second guide plate (22). The screening chamber (13) is provided with a screen (32), which is located between the discharge port (31) and the first crushing roller sleeve (16). A rotating shaft (33) is fixedly installed on the frame of the screen (32), and the rotating shaft (33) is rotatably installed with the inner wall of the screening chamber (13). A cylindrical return spring (34) is symmetrically fixedly installed between the frame of the screen (32) and the partition plate (35).

3. The twin-screw extruder for bean production as described in claim 2, characterized in that, The partition (35) has symmetrically arranged storage slots (36) inside. The two first transmission rollers (15) are fixedly installed with toothed impactors (37) on their circumferential surfaces. The two toothed impactors (37) are located inside the storage slots (36). The two toothed impactors (37) are adapted to the frame of the screen (32). The bottom of the softening cavity (14) is provided with an inclined surface (38). A stretchable heat-resistant diaphragm cloth (39) is fixedly installed between the inclined surface (38) and the frame of the screen (32). A baffle (41) is fixedly installed on the side wall of the partition (35) away from the screen (32).

4. The twin-screw extruder for bean production as described in claim 3, characterized in that, The first pretreatment box (12) is provided with a discharge funnel (42) on its side wall. The softening chamber (14) is connected to the discharge funnel (42). A pneumatic bean conveyor (43) is fixedly installed on the upper end of the double helix puffing equipment body (11). The feed pipe of the pneumatic bean conveyor (43) is fixedly installed with the discharge funnel (42). The discharge pipe of the pneumatic bean conveyor (43) is fixedly installed with the second pretreatment box (17).

5. The twin-screw extruder for bean production as described in claim 4, characterized in that, The pneumatic bean conveyor (43) can transport the beans discharged from the discharge funnel (42) to the inside of the second pretreatment box (17). The double screw puffing equipment body (11) has an inlet (44) inside, which is connected to the outlet (31).

6. The twin-screw extruder for bean production as described in claim 5, characterized in that, The partition (35) and the softening cavity (14) are both provided with sliding grooves (45). Sliding blocks (46) are slidably installed inside the two sliding grooves (45). Supports (47) are fixedly installed on the side walls of the two sliding blocks (46). A rack (48) is fixedly installed between the two supports (47). A sweeping brush (49) is fixedly installed between the two supports (47). The sweeping brush (49) is made of heat-resistant flexible plastic material and is parallel to the inclined plane (38).

7. The twin-screw extrusion equipment for bean production as described in claim 1, characterized in that, A first missing gear (51) and a second missing gear (52) are fixedly installed on the circumferential surfaces of the two first transmission rollers (15). The first missing gear (51) and the second missing gear (52) are both meshed with the rack (48). The first missing gear (51) and the second missing gear (52) are both located inside the softening chamber (14). Steam injectors (53) are symmetrically provided on the side walls of the two softening chambers (14). The nozzles of the two steam injectors (53) are both facing the inclined plane (38).

8. The twin-screw extruder for bean production as described in claim 7, characterized in that, The double helical extrusion device body (11) is symmetrically provided with brushless motors (23) on the side wall. The output shafts of the two brushless motors (23) are fixedly mounted with first pulleys (24), and the circumferential surfaces of the two first transmission rollers (15) are fixedly mounted with second pulleys (25).

9. The twin-screw extruder for bean production as described in claim 8, characterized in that, A first synchronous belt (26) is wound between the two first pulleys (24) and the second pulley (25), and a third pulley (27) is fixedly installed on the circumferential surface of the two first transmission rollers (15).

10. The twin-screw extruder for bean production as described in claim 9, characterized in that, The two second pulleys (25) and the third pulley (27) are located outside the first pretreatment box (12). The two second drive rollers (18) are fixedly mounted with a fourth pulley (28) on their circumferential surfaces. A second synchronous belt (29) is wound between the two third pulleys (27) and the fourth pulley (28).

Images