A non-destructive insect feed separation device

Abstract

This application provides a non-destructive separation device for insect feed, relating to the field of separation equipment technology. The device includes a main frame and a primary screening unit mounted on the main frame, with a secondary screening unit located below the primary screening unit. The primary screening unit includes a primary screening box slidably connected to the main frame and a first driving component for driving the primary screening box to reciprocate. The sliding direction of the primary screening box on the main frame is inclined relative to the horizontal plane. The bottom of the primary screening box is a horizontally arranged arc-shaped portion, and a screening perforated plate is provided at the bottom of the primary screening box. The secondary screening unit includes a secondary screening box, within which a screening drawer is provided. One end of the screening drawer has a discharge port, and a lighting lamp is located at the end of the secondary screening box furthest from the discharge port. This device can achieve low-loss, high-purity separation of larvae and insect excrement.

Description

Technical Field

[0001] This invention relates to the field of separation equipment technology, specifically to a non-destructive separation device for insect feed. Background Technology

[0002] Black soldier flies, as a resource-rich insect, can efficiently process human waste such as kitchen waste, boasting advantages such as high conversion rate, rapid growth, and strong environmental adaptability. In the large-scale breeding and application of black soldier flies, to facilitate subsequent deep processing or commercial use as feed or fertilizer, it is necessary to effectively separate the fresh insects from the mixture of insect excrement and sand (larval excrement) produced after breeding.

[0003] Currently, the main methods for separating fresh insects from insect excrement are manual separation and mechanical screening. While manual separation causes less damage to larvae, it suffers from low efficiency, high labor intensity, and difficulty in large-scale application. Therefore, mechanical screening equipment is more commonly used in actual production to improve separation efficiency. However, existing mechanical screening equipment generally suffers from problems such as easily damaging larvae and having a high content of live insects in the separated material, specifically manifested as follows: First, existing equipment mostly uses metal spiral blades to transport materials. The edges of the spiral blades are relatively sharp and fit against the inner wall of the conveying cylinder. When transporting black soldier fly larvae and a mixture of insects and sand, the blades can easily cause mechanical cutting and crushing damage to the larvae, affecting their survival rate and subsequent utilization value.

[0004] Secondly, vibrating screens often use low-frequency, high-amplitude vibration. The large vibration amplitude can cause larvae to be frequently thrown up and dropped, resulting in mechanical damage.

[0005] Third, the average width of black soldier fly larvae is about 4.97 mm, while the average particle size of insect sand is about 2 mm. The size difference between the two is small, and some smaller larvae may be mistakenly sifted into the insect sand, resulting in a higher content of live insects in the insect sand and reducing its purity as organic fertilizer. Summary of the Invention

[0006] In view of the problems of high larval damage rate and low separation purity in the existing technology, the present application provides a non-destructive separation device for insect materials that can achieve low-damage and high-purity separation of larvae and insect sand.

[0007] The technical solution adopted by this invention to solve its technical problem is: A non-destructive insect feed separation device includes a main frame and a primary screening unit disposed on the main frame, and a secondary screening unit is disposed below the primary screening unit. The primary screening assembly includes a primary screening box that is slidably connected to the main frame and a first driving component for driving the primary screening box to reciprocate. The sliding direction of the primary screening box is inclined relative to the horizontal plane; The bottom of the primary screening box is a horizontally arranged arc-shaped part, and the bottom of the primary screening box is provided with a screening perforated plate; The secondary screening unit includes a secondary screening box, a screening drawer is provided inside the secondary screening box, a material discharge port is provided at one end of the screening drawer, and a lighting lamp is provided at the end of the secondary screening box away from the material discharge port.

[0008] Furthermore, the internal space of the secondary screening box is divided into two screening chambers by a first partition. Guide plates are respectively provided on both sides of the first partition, and the material can be diverted to the two screening chambers along the guide plates. The screening chambers are divided into multiple screening sections by several second partitions. Screening drawers and collection drawers are arranged sequentially from top to bottom below the guide plates in each screening section. The end of the screening drawer facing the first partition is an open structure, and a material discharge port is formed between the open end and the first partition.

[0009] Furthermore, the bottom plate of the screening drawer is inclined upward along the direction close to the first partition, and a locking mechanism is provided between the screening drawer and the secondary screening box.

[0010] Furthermore, the feed end of the primary screening box extends to the outside of the main frame. The feed end of the primary screening box is provided with a drive beam, and a sliding plate is slidably provided on the drive beam. The first drive component includes a drive wheel and a first drive motor for driving the drive wheel to rotate around its own axis. An eccentric shaft is provided on the drive wheel, and the lower end of the eccentric shaft is inserted into the sliding plate. When the drive wheel rotates under the drive of the first drive motor, the eccentric shaft can drive the primary screening box to reciprocate.

[0011] Furthermore, it also includes a conveying auger and a second driving component for driving the conveying auger to rotate. The conveying auger is located inside the primary screening box. There is a gap between the outer edge of the spiral blades of the conveying auger and the inner surface of the arc-shaped part of the primary screening box. The conveying direction of the conveying auger is opposite to the discharge direction of the primary screening box.

[0012] Furthermore, a drying chamber with a closed upper end and an open lower end is provided on the main frame above the primary screening chamber, and the drying chamber and the primary screening chamber together form a drying cavity. An air inlet is provided on the top of the drying chamber, and the air inlet is connected to a fan through a pipe.

[0013] Furthermore, a first baffle is provided at one end of the drying chamber near the feed side, and a material passage gap is formed between the first baffle and the primary screening chamber to control the feed thickness. A second baffle is provided at one end of the drying chamber near the discharge side, and a discharge gap is formed between the second baffle and the primary screening chamber.

[0014] Furthermore, there is a buffer space between the spiral blades of the conveying auger and the first baffle.

[0015] Furthermore, the two ends of the conveying auger's rotating shaft are rotatably connected to the first baffle and the second baffle, respectively. The second drive motor is mounted on the second baffle via a second motor mount. The end of the conveying auger's rotating shaft passes through the second motor mount and is connected to the power output shaft of the second drive motor.

[0016] Furthermore, each air inlet is equipped with a fabric hood, the air inlet end of which passes through the top plate of the drying chamber and is fixedly connected to the top plate of the drying chamber by a fixing nut, and the air outlet end of the fabric hood is provided with multiple air outlet holes evenly distributed.

[0017] The beneficial effects of this invention are: 1. The insect material separation device provided in this application adopts an inclined reciprocating sliding screening method, which completes one screening while conveying the material. Compared with the traditional auger conveying + low-frequency large-amplitude vibration screening method, this equipment not only simplifies the structure and reduces the cost, but also avoids the throwing damage caused by frequent dropping of larvae, as well as the squeezing or cutting damage to larvae by the spiral blades, eliminating the risk of mechanical damage and achieving low-damage or even non-destructive separation of larvae.

[0018] 2. The non-destructive separation device for insect feed provided in this application embodiment adopts a two-stage screening process: the first screening achieves the initial separation of larvae and insect sand, while the second screening guides small larvae to actively migrate to a special collection drawer through the synergistic effect of multiple mechanisms such as diversion, light induction, and inclined bottom plate, thereby significantly reducing the live insect residue in the insect sand.

[0019] 3. The non-destructive insect material separation device provided in this application embodiment, by configuring a conveying auger and adopting a reverse pushing operation mechanism, can achieve precise control of the material layer thickness. This design ensures that the material maintains a uniform and stable distribution throughout the screening process, thereby effectively improving the screening accuracy of the equipment and making the overall separation effect more reliable and efficient.

[0020] 4. The insect feed non-destructive separation equipment provided in this application embodiment has a reasonable overall structure design. The primary and secondary screening work together to achieve continuous and automated separation. It is suitable for post-processing scenarios in large-scale breeding and has good economic benefits and application prospects. Attached Figure Description

[0021] Figure 1 A three-dimensional structural diagram of a non-destructive insect feed separation device provided in this application embodiment. Figure 1 ; Figure 2 for Figure 1 A magnified structural diagram of part A in the middle; Figure 3 A three-dimensional structural diagram of a non-destructive insect feed separation device provided in this application embodiment. Figure 2 ; Figure 4 A top view of a non-destructive insect feed separation device provided in an embodiment of this application; Figure 5 for Figure 4 A schematic diagram of the AA cross-sectional structure in the diagram; Figure 6 for Figure 5 A magnified structural diagram of part B in the middle section; Figure 7 for Figure 5 A magnified structural diagram of section C; Figure 8 for Figure 5 A magnified structural diagram of section D in the middle; Figure 9 for Figure 5 A magnified structural diagram of section E in the middle; Figure 10 A front view of a non-destructive insect feed separation device provided in an embodiment of this application; Figure 11 for Figure 10 Schematic diagram of the BB cross-sectional structure in the middle; Figure 12 for Figure 11 A magnified structural diagram of section F in the middle; Figure 13 for Figure 11 A magnified structural diagram of section G in the middle; Figure 14 Exploded view of a single screening unit; Figure 15 Exploded view of the scraper assembly; Figure 16 Exploded view of the secondary screening unit; Figure 17 for Figure 16 A magnified structural diagram of section H in the middle; Figure 18 This is a schematic diagram of the three-dimensional structure of the secondary screening box; Figure 19 for Figure 18 A magnified structural diagram of section I.

[0022] In the diagram: 1. Main frame; 11. Rectangular frame; 12. Column; 13. Base plate; 14. First mounting plate; 15. Second mounting plate; 2. Primary screening unit; 21. Primary screening box; 211. Arc-shaped part; 212. Vertical part; 213. End plate; 22. Screening hole plate; 231. Drive beam; 2311. Connecting plate; 232. Slide plate; 233. First drive motor; 234. Drive wheel; 2341. Connecting shaft; 2342. Eccentric shaft; 235. Coupling; 236. Linear bearing; 2371. First guide rail; 2372. First slider; 238. First motor base; 24. Second guide rail; 3. Secondary screening unit; 311. Secondary screening box body; 3111. Insertion port; 3112. First ear plate; 312. First partition plate; 313. Guide plate; 314. Second partition plate; 315. Guide groove; 316. First buffer pad; 32. Screening drawer; 321. Second ear plate; 322. Second buffer pad; 33. Collection drawer; 331. Third buffer pad; 34. Lighting lamp; 41. Conveying auger; 411. Rotating shaft; 412. Spiral blade; 42. Drying chamber; 421. Main chamber; 422. Top plate; 423. Sealing gasket; 424. First baffle; 425. Second baffle; 426. Mounting base; 43. Air hood; 431. Fixing nut; 44. Second drive motor; 45. Second motor base; 46. Second slider. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings. The described embodiments are merely a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the protection scope of this application.

[0024] To facilitate understanding of the specific embodiments of this application, a coordinate system is now defined as follows: Figure 1 As shown, the left and right directions are horizontal, the front and back directions are vertical, and the up and down directions are vertical.

[0025] like Figure 1 , Figure 2 and Figure 10 As shown, a non-destructive insect feed separation device includes a main frame 1, on which a primary screening unit 2 is provided, and below the primary screening unit 2, a secondary screening unit 3 is provided. The secondary screening unit 3 is used to finely separate the insect sand and larval mixture remaining after the primary screening.

[0026] like Figure 5 , Figure 11 and Figure 14 As shown, the primary screening unit 2 includes a primary screening box 21 slidably connected to the main frame 1, and a first driving component for driving the primary screening box 21 to reciprocate along the main frame 1 is provided between the main frame 1 and the primary screening box 21. The sliding direction of the primary screening box 21 relative to the main frame 1 is consistent with the conveying direction of the material (a mixture of larvae and insect sand), and it is inclined relative to the horizontal plane. Figure 1 In the coordinate system shown, the primary screening box 21 slides back and forth relative to the main frame 1 in a direction from lower left to upper right. Preferably, the sliding direction of the primary screening box 21 is inclined at 1-3° relative to the horizontal plane.

[0027] The bottom of the primary screening box 21 is horizontal, and a screening perforated plate 22 is provided at the bottom of the primary screening box 21. When the primary screening box 21 changes from moving to the upper right to moving to the lower left under the drive of the first driving component, the material will initially continue to slide relative to the box to the upper right due to inertia. Subsequently, the material will gradually reduce its speed of moving to the upper right under the drive of the primary screening box 21 until it moves synchronously to the lower left with the box. Similarly, when the primary screening box 21 changes from moving to the lower left to moving to the upper right, the material will initially continue to slide relative to the box to the lower left due to inertia. Subsequently, the material will gradually reduce its speed of moving to the lower left under the drive of the primary screening box 21 until it moves synchronously to the upper right with the box. Since the screening box 21 has both horizontal and vertical components during its reciprocating movement, the pressure between the material and the screening box 21 varies. Specifically, the pressure N1 between the material and the screening box 21 when the screening box 21 moves to the upper right is greater than the pressure N2 between the material and the screening box 21 when the screening box 21 moves to the lower left. Because the pressure N1 between the material and the screening box 21 is greater when the screening box 21 moves to the upper right than the pressure N2 when it moves to the lower left, the frictional force f1 between the material and the screening box 21 is greater when it moves to the upper right than when it moves to the lower left. Consequently, the distance L1 that the material moves to the upper right due to inertia when the screening box 21 moves to the lower left is greater than the distance L2 that the material moves to the lower left due to inertia when it moves to the upper right. This results in a net displacement of the material in each reciprocating motion, thus continuously conveying it directionally towards the discharge end. It can be imagined that as the tilt angle of the primary screening box 21 increases, the throwing action on the material when the primary screening box 21 moves to the upper right becomes more significant. If the tilt angle of the primary screening box 21 increases to a certain extent, when the primary screening box 21 changes from moving to the upper right to moving to the lower left, the material will be completely thrown up and detached from the screen surface, forming a brief state of suspension. At this time, the material will not be subject to the frictional force of the primary screening box 21. Based on the above analysis, when the primary screening box 21 slides back and forth under the drive of the first drive component, the material inside the primary screening box 21 will gradually move towards the discharge side (according to...). Figure 1 (The coordinate system shown is on the right) During the movement of the material in the primary screening box 21, the smaller insect sand particles will fall through the screening hole plate 22 into the secondary screening section 3, while the larger black soldier fly larvae will migrate towards the discharge end and eventually be discharged from the discharge end, thus achieving the initial non-destructive separation of larvae and insect sand.

[0028] This application reduces the throwing motion of materials by setting a reasonable tilt angle, which can prevent larvae from being injured or stressed by violent throwing, while ensuring that the insect sand falls and moves in a directional manner during the screening process.

[0029] In one specific implementation, the main frame 1 in this embodiment includes a rectangular frame 11 formed by four side beams connected end to end. A column 12 for supporting the rectangular frame 11 is disposed below the rectangular frame 11, and a base plate 13 is fixedly disposed on the lower end surface of the column 12 by welding. For example, four columns 12 are disposed below the rectangular frame 11, and the four columns 12 are located at the four corners of the rectangular frame 11. The main frame 1 spans the primary screening box 21 longitudinally.

[0030] like Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, the feed end of the primary screening box 21 extends to the outside of the main frame 1 to facilitate material feeding and observation by the operator, while preventing material from accumulating and overflowing at the feed end. A drive beam 231 is provided at the feed end of the primary screening box 21, and a sliding plate 232 is slidably mounted on the drive beam 231. The sliding direction of the sliding plate 232 relative to the primary screening box 21 is perpendicular to the sliding direction of the primary screening box 21. The first driving component includes a first drive motor 233 and a drive wheel 234. The first drive motor 233 is detachably fixed to the main frame 1. The upper end face of the drive wheel 234 is provided with a connecting shaft 2341 coaxially arranged with the drive wheel 234. The connecting shaft 2341 is connected to the power output shaft of the first drive motor 233 through a coupling 235. The lower end face of the drive wheel 234 is provided with an eccentric shaft 2342, and the axis of the eccentric shaft 2342 has a certain eccentricity with the rotation center line of the drive wheel 234. The lower end of the eccentric shaft 2342 is inserted into the slide plate 232, and the slide plate 232 has a cylindrical through hole adapted to the eccentric shaft 2342. When the drive wheel 234 rotates under the drive of the first drive motor 233, the eccentric shaft 2342 moves in a circular motion around the center of the drive wheel 234, thereby driving the primary screening box 21 to reciprocate.

[0031] Furthermore, in order to reduce the friction between the slide plate 232 and the eccentric shaft 2342, a linear bearing 236 is fixedly installed on the slide plate 232, and the lower end of the eccentric shaft 2342 is inserted into the linear bearing 236 to form a sliding fit with the linear bearing 236.

[0032] In one specific embodiment, connecting plates 2311 are welded to both ends of the drive beam 231, and the two connecting plates 2311 are fixedly connected to the front and rear side walls of the primary screening box 21 by bolts. A first guide rail 2371 extending in the front-rear direction is fixedly provided on the side of the drive beam 231 facing the discharge side, and a first slider 2372 adapted to the first guide rail 2371 is fixedly provided on the slide plate 232. The linear bearing 236 is fixedly provided on the side of the slide plate 232 facing the discharge side by bolts.

[0033] In one specific implementation, a first mounting plate 14 is fixedly installed on the left side beam of the main frame 1 by welding. The first drive motor 233 is fixedly installed on the first mounting plate 14 via a first motor base 238. The first motor base 238 is an externally purchased component and can be obtained directly through external purchase; its internal structure will not be described in detail here. The first drive motor 233 is fixedly installed on the upper end of the first motor base 238 by screws. The connecting shaft 2341 of the drive wheel 234 passes from bottom to top through the slewing bearing of the first motor base 238 and is locked by a lock nut. The end of the connecting shaft 2341 is rigidly connected to the power output shaft of the first drive motor 233 via a coupling 235.

[0034] Furthermore, such as Figure 3 , Figure 4 , Figure 5 and Figure 9As shown, the bottom of the primary screening box 21 is an arc-shaped portion 211 with an arc structure, and the axis of the arc-shaped portion 211 is horizontal. The screening perforated plate 22 is adapted to the arc-shaped surface of the bottom of the primary screening box 21, and the upper surface of the screening perforated plate 22 is flush with the upper side surface of the bottom of the primary screening box 21, forming a complete arc-shaped surface. A conveying auger 41 is provided inside the primary screening box 21. The conveying auger 41 is rotatably connected to the main frame 1, and a second driving component for driving the conveying auger 41 to rotate is provided between the main frame 1 and the conveying auger 41. There is a gap M between the outer edge of the spiral blade 412 of the conveying auger 41 and the inner surface of the arc-shaped portion 211 of the primary screening box 21, and the conveying direction of the conveying auger 41 is opposite to the discharge direction of the primary screening box 21. In actual operation, the material moves towards the discharge end under the conveying action of the primary screening box 21. Simultaneously, the reverse conveying action of the conveying auger 41 pushes the upper layer of material in the primary screening box 21 back to the feed side, allowing it to participate in screening again. This controls the thickness of the material in the screening area, preventing excessive material accumulation that could reduce screening accuracy. Furthermore, because there is a gap between the outer edge of the spiral blades 412 of the conveying auger 41 and the inner surface of the arc-shaped portion 211 of the primary screening box 21, it effectively prevents larvae from being crushed and damaged during screening, thus achieving non-destructive separation of insects and material, balancing screening efficiency and larval survival rate.

[0035] Preferably, the gap M between the outer edge of the spiral blade 412 of the conveying auger 41 and the inner surface of the arc-shaped portion 211 of the primary screening box 21 is 20-30 mm.

[0036] In one specific embodiment, the primary screening box 21 in this embodiment includes an arc-shaped portion 211 with an arc-shaped structure. Vertical portions 212 extending upwards in a vertical direction are respectively provided at both ends of the arc-shaped portion 211. The arc-shaped portion 211 and the vertical portions 212 together form a U-shaped structure with an upward-facing opening. The connecting plates 2311 at both ends of the drive beam 231 are respectively connected and fixed to the vertical portions 212 of the primary screening box 21 by bolts. An end plate 213 is provided at the feed end of the primary screening box 21, and the discharge end of the primary screening box 21 is open, serving as the discharge port of the primary screening box 21, facilitating the natural sliding of the screened larvae along the arc-shaped bottom to the subsequent processing station.

[0037] Here, the screening plate 22 can be integrated with the primary screening box 21, that is, the screening holes are directly set at the bottom of the primary screening box 21, or it can be a detachable structure, that is, the screening plate 22 is fixedly connected to the bottom of the primary screening box 21 in a detachable manner.

[0038] In one specific implementation, the screening plate 22 described in this embodiment is a detachable structure. An installation groove is provided on the inner side of the bottom of the primary screening box 21, and a material discharge port is provided through the bottom surface of the installation groove. The screening plate 22 is embedded in the installation groove and is detachably connected to the bottom of the primary screening box 21 by fasteners. This allows for flexible replacement of the screening plate 22 with the corresponding aperture according to different material characteristics (such as larval body length and particle size distribution of insect excrement), adapting to different working conditions and improving screening accuracy and adaptability.

[0039] Furthermore, such as Figure 3 and Figure 5 As shown, a drying chamber 42, with its upper end closed and lower end open, is disposed on the main frame 1 above the screening area of ​​the primary screening chamber 21, and the drying chamber 42 and the primary screening chamber 21 together form a drying cavity. Several air inlets are provided on the top of the drying chamber 42, and these air inlets are connected to a fan (not shown in the figure) via pipes (not shown). Part of the airflow entering the drying cavity through the air inlets passes through the material and flows out through the screening perforated plate 22, while the other part passes over the material surface and flows out through the gap between the drying chamber 42 and the primary screening chamber 21.

[0040] The reason for this design is that insect sand easily absorbs water and agglomerates in humid environments, forming clumps and lumps that adhere to the surfaces of equipment such as the spiral blades 412, leading to reduced screening efficiency. By setting up a drying chamber and air inlet, the moisture content of the insect sand can be effectively reduced, inhibiting its agglomeration tendency, thereby significantly improving the continuity and stability of the screening process. This provides a uniform and loose material base for the subsequent secondary screening unit 3, achieving efficient primary screening and separation of larvae and insect sand.

[0041] Furthermore, such as Figure 5 and Figure 14 As shown, a first baffle 424 is provided at one end of the drying chamber 42 near the feed side, and the first baffle 424 extends into the primary screening chamber 21. The lower edge of the first baffle 424 has an arc-shaped structure, and a material passage gap is formed between the lower edge of the first baffle 424 and the primary screening chamber 21. The first baffle 424 can initially flatten the material and control the feed thickness, thereby ensuring that the material is evenly distributed in the screening area and avoiding local accumulation or excessive thinness that leads to uneven screening. A second baffle 425 is provided at one end of the drying chamber near the discharge side, and the second baffle 425 extends into the primary screening chamber 21. Its lower edge also has an arc-shaped structure, and a discharge gap is formed between it and the primary screening chamber 21. By setting the first baffle 424 and the second baffle 425, more airflow can pass through the material and flow out through the screening perforated plate 22, thereby improving drying efficiency and screening uniformity.

[0042] Furthermore, there is a gap between the spiral blades 412 of the conveying auger 41 and the first baffle 424, forming a buffer space. The material pushed to the feed side by the conveying auger 41 can be temporarily stored in the buffer space, avoiding the material from being squeezed under the conveying action of the conveying auger 41, which would cause damage to the larvae.

[0043] Furthermore, in order to improve the uniformity of airflow, such as Figure 5 , Figure 8 and Figure 15 As shown, each air inlet is equipped with a fabric hood 43. The air inlet end of the fabric hood 43 extends through the top plate 422 of the drying chamber 42 to the outside of the drying chamber 42, and is fixedly connected to the top plate 422 of the drying chamber 42 by a fixing nut 431; the air outlet end of the fabric hood 43 is evenly provided with multiple air outlet holes for uniformly dispersing airflow into the drying chamber. Preferably, the fabric hood 43 includes a conical guide section and a cylindrical connecting section. The air outlet holes are located on the bottom surface of the guide section, and the outer side of the connecting section has a stepped shaft structure. Under the locking action of the fixing nut 431, the stepped surface of the connecting section presses upward against the lower side of the top plate 422 of the drying chamber 42.

[0044] Furthermore, for ease of installation and maintenance, such as Figure 15 As shown, the drying chamber 42 includes a main chamber 421 formed by four side panels connected end to end in sequence. The top plate 422 is fixed to the top opening of the main chamber 421 by bolts, and a sealing gasket 423 is provided between the main chamber 421 and the top plate 422.

[0045] As one specific implementation method, such as Figure 3 , Figure 5 and Figure 15 As shown, in this embodiment, the drying chamber 42 is entirely located within the rectangular frame 11 of the main frame 1. The front and rear side walls of the drying chamber 42 (according to...) Figure 1Three mounting seats 426 are welded onto each of the coordinate systems shown. Second mounting plates 15, corresponding one-to-one with the mounting seats 426, are welded onto the front and rear side beams of the main frame 1. The lower sides of the mounting seats 426 and the upper sides of the second mounting plates 15 are machined surfaces and are fastened together with bolts to ensure a stable and precise installation between the drying chamber 42 and the main frame 1. The conveying auger 41 is located between the first baffle 424 and the second baffle 425. The two ends of the rotating shaft 411 of the conveying auger 41 are rotatably connected to the first baffle 424 and the second baffle 425 via bearing assemblies. The second driving component is a second drive motor 44 mounted on the drying chamber 42, and the power output shaft of the second drive motor 44 is connected to the rotating shaft 411 of the conveying auger 41. For example, a detachable second motor base 45 is fixedly provided on the outer side of the second baffle 425 (with the side opposite to the first baffle 424 and the second baffle 425 as the inner side). The second drive motor 44 is fixedly installed on the end of the second motor base 45 facing away from the second baffle 425. The power output shaft of the second drive motor 44 adopts a hollow shaft structure. The end of the rotating shaft 411 of the conveying auger 41 passes through the second motor base 45 and is inserted into the power output shaft of the second drive motor 44.

[0046] As one specific implementation method, such as Figure 11 and Figure 12 As shown, in this embodiment, the primary screening box 21 is slidably connected to the drying box 42 via a linear guide pair. The front and rear sides of the primary screening box 21 (according to...) Figure 1 The drying chamber 42 is provided with second guide rails 24 in the coordinate system shown, and the second guide rails 24 are arranged obliquely upwards along the direction closer to the discharge side. At least two second sliders 46 that cooperate with the second guide rails 24 are respectively provided on the front and rear sides of the drying chamber 42. For example, four second sliders 46 that cooperate with the second guide rails 24 are respectively provided on the front and rear sides of the drying chamber 42.

[0047] like Figure 11 , Figure 16 and Figure 18 As shown, the secondary screening unit 3 includes a secondary screening box 311 with an open top. A first partition 312 is provided inside the secondary screening box 311. The first partition 312 is parallel to the material conveying direction and divides the internal space of the secondary screening box 311 into two independent screening chambers. The two sides of the first partition 312 (according to...) Figure 1The coordinate system shown indicates that guide plates 313 are respectively installed on the front and rear sides. The guide plates 313 are arranged inclined downwards in the direction away from the first partition plate 312. Under the guidance of the guide plates 313, the material that has passed through the first screening section can slide down the surface of the guide plates 313 and naturally split to both sides, thereby guiding the material to flow evenly into the two screening chambers along a predetermined path, effectively avoiding the accumulation or deviation of material during the diversion process.

[0048] In one specific implementation, the two guide plates 313 are symmetrically arranged about the first partition 312 and are both located at the upper end of the first partition 312. The two guide plates 313 together form a "human" shaped guide structure.

[0049] The screening chamber is provided with several second partitions 314 evenly distributed along the material conveying direction. These second partitions 314 divide each screening chamber into multiple independent screening sections along the conveying direction. Within each screening section, from top to bottom, are sequentially arranged screening drawers 32 and collection drawers 33. The side walls of the secondary screening box 311 (according to...) Figure 1 The coordinate system shown represents the front and rear side walls. Insertion ports 3111, matching the screening drawer 32 and the collection drawer 33, are provided on the screen. The end of the screening drawer 32 facing the first partition 312 is open, forming a discharge port between the open end and the first partition 312. The collection drawer 33 abuts against the first partition 312, ensuring that all material from the discharge port falls into the collection drawer 33. A lighting lamp 34 is provided above the screening drawer 32 at the end furthest from the discharge port. Preferably, the lighting lamp 34 is fixed to the side wall of the secondary screening box 311 by screws.

[0050] During operation, the insect sand and some smaller larvae separated by the screening plate 22 slide into the two screening chambers under the guidance of the guide plate 313, and then fall into the screening drawer 32. Utilizing the negative phototaxis of black soldier fly larvae, the larvae falling into the screening drawer 32 will quickly crawl away from the light source 34, thus falling into the collection drawer 33 through the discharge port, while the insect sand remains in the drawer, achieving efficient and non-destructive separation of insect sand and larvae. The drawer-type design of the screening drawer 32 and the collection drawer 33 allows operators to easily clean the insect sand in the screening drawer 32 and centrally transfer and process the larvae in the collection drawer 33.

[0051] Furthermore, the bottom plate of the screening drawer 32 is inclined upwards along the direction close to the first partition 312. The reason for this design is that black soldier fly larvae not only have negative phototaxis, but also have the habit of climbing upwards. The inclined bottom plate design can further guide the larvae to actively move towards the discharge port, significantly improving separation efficiency and collection purity.

[0052] Furthermore, since the screening drawer 32 tends to slide outward under the action of the inclined base plate, a locking mechanism is provided between the screening drawer 32 and the secondary screening box 311 to prevent it from shifting during operation.

[0053] As one specific implementation method, such as Figure 16 and Figure 17 As shown, in this embodiment, a first ear plate 3112 is provided on the side wall of the secondary screening box 311 above the insertion port 3111 of the screening drawer 32. The first ear plate 3112 has a first pin hole. A second ear plate 321 is provided on the side plate of the screening drawer 32 away from the first partition 312. The second ear plate 321 has a second pin hole. When the screening drawer 32 is fully inserted, the first pin hole and the second pin hole are aligned. Inserting a pin into the first pin hole and the second pin hole will lock and fix the screening drawer 32. Preferably, the pin is hung on the handle of the screening drawer 32 by a connecting rope for easy access by the operator and to prevent loss.

[0054] As one specific implementation method, such as Figure 18 and Figure 19 As shown, in this embodiment, inclined guide grooves 315 are respectively provided on the two side walls of the screening section. The two ends of the bottom plate of the screening drawer 32 are respectively inserted into the guide grooves 315 and form a sliding fit structure with the guide grooves 315 to ensure that the screening drawer 32 runs smoothly along the preset inclination angle during insertion and extraction.

[0055] Furthermore, such as Figure 13 As shown, a first buffer pad 316 is provided on the upper side of the guide plate 313, a second buffer pad 322 is provided on the bottom plate of the screening drawer 32, and a third buffer pad 331 is provided on the bottom plate of the collection drawer 33. Preferably, the first buffer pad 316, the second buffer pad 322, and the third buffer pad 331 are all made of elastic rubber material, whose excellent resilience can effectively absorb the impact energy during the larvae's fall and crawling, reduce mechanical damage, and ensure the larvae's activity and subsequent conversion efficiency.

[0056] The working process of a non-destructive insect feed separation device is as follows: First, start the first drive unit to drive the primary screening box 21 to slide back and forth along the inclined direction; at the same time, start the second drive unit to make the conveying auger 41 rotate in the opposite direction; turn on the fan to send airflow into the drying box 42.

[0057] Second, the mixture of black soldier fly larvae and insect sand is fed into the primary screening chamber 21. Under the inertial force generated by the reciprocating sliding of the primary screening chamber 21, the material gradually moves directionally towards the discharge end. During this movement, smaller-sized insect sand particles fall through the bottom screening perforated plate 22 to the secondary screening section 3, while larger-sized larvae continue to be conveyed towards the discharge end, achieving preliminary separation. During the primary screening process, the airflow from the blower is evenly diffused into the drying chamber through the air distribution hood 43, passing through the material layer to reduce the moisture content of the insect sand, preventing the insect sand from absorbing water and agglomerating, and ensuring the continuity of the screening process. When the conveying auger 41 rotates in the reverse direction, its spiral blades 412 push the material in the upper layer of the primary screening chamber 21 back to the feed side, allowing the material to participate in the screening again, thereby controlling the thickness of the material layer in the screening area and avoiding accumulation that affects screening accuracy.

[0058] Third, after preliminary screening, the larvae are discharged from the outlet of the primary screening chamber 21 and enter the subsequent processing station; the falling insect sand and a small number of smaller larvae fall into the secondary screening section 3. The mixture entering the secondary screening chamber 311 is evenly distributed to the two screening chambers by the "V"-shaped guide plate 313, and then falls into the screening drawer 32. Taking advantage of the black soldier fly larvae's negative phototaxis and upward crawling habit, the larvae will actively crawl away from the light source 34 and fall into the collection drawer 33 below through the discharge port, while the insect sand remains in the screening drawer 32, thus achieving efficient and non-destructive separation of insect sand and larvae.

[0059] Example 2 The main difference between this embodiment and Embodiment 1 is that the second slider 46 is disposed on the main frame 1.

[0060] In one specific implementation, the side of the column 12 facing the primary screening box 21 is provided with a second slider 46 that cooperates with the second guide rail 24.

[0061] Example 3 The main difference between this embodiment and Embodiment 1 is that both ends of the conveying auger 41 are rotatably connected to the main frame 1.

[0062] In one specific embodiment, a first connecting beam is provided between the two columns 12 on the left side, and both ends of the first connecting beam are fixedly connected to the columns 12 by welding. A second connecting beam is provided between the two columns 12 on the right side, and both ends of the second connecting beam are fixedly connected to the columns 12 by welding. The two ends of the rotating shaft 411 of the conveying auger 41 are rotatably connected to the first and second connecting beams by bearing assemblies. The second drive motor 44 is mounted on the main frame 1, and the power output shaft of the second drive motor 44 is parallel to the conveying auger 41. The power output shaft of the second drive motor 44 is connected to the rotating shaft 411 of the conveying auger 41 by a synchronous belt transmission structure.

[0063] Other embodiments obtained by those skilled in the art based on the embodiments provided in this application by combining, splitting, or reorganizing the embodiments of this application do not exceed the protection scope of this application.

[0064] The above detailed embodiments have provided a detailed explanation of the purpose, technical solutions, and beneficial effects of the embodiments of this application. The above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. That is, any modifications, equivalent substitutions, improvements, etc., made on the basis of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A non-destructive insect feed separation device, comprising a main frame (1) and a primary screening unit (2) disposed on the main frame (1), characterized in that: A secondary screening unit (3) is provided below the primary screening unit (2). The primary screening assembly (2) includes a primary screening box (21) slidably connected to the main frame (1) and a first driving component for driving the primary screening box (21) to reciprocate. The sliding direction of the primary screening box (21) is inclined relative to the horizontal plane; The bottom of the primary screening box (21) is a horizontally arranged arc-shaped part (211), and a screening hole plate (22) is provided at the bottom of the primary screening box (21). The secondary screening unit (3) includes a secondary screening box (311), a screening drawer (32) is provided inside the secondary screening box (311), a material discharge port is provided at one end of the screening drawer (32), and a lighting lamp (34) is provided at the end of the secondary screening box (311) away from the material discharge port.

2. The non-destructive insect feed separation device according to claim 1, characterized in that: The internal space of the secondary screening box (311) is divided into two screening chambers by a first partition (312). A guide plate (313) is provided on both sides of the first partition (312), and the material can be diverted to the two screening chambers along the guide plate (313). The screening chamber is divided into multiple screening sections by several second partitions (314). In the screening section, a screening drawer (32) and a collection drawer (33) are arranged from top to bottom below the guide plate (313). The end of the screening drawer (32) facing the first partition (312) is an open structure, and a discharge port is formed between the open end and the first partition (312).

3. The non-destructive insect feed separation device according to claim 2, characterized in that: The bottom plate of the screening drawer (32) is inclined upward along the direction close to the first partition (312), and there is a locking mechanism between the screening drawer (32) and the secondary screening box (311).

4. The non-destructive insect feed separation device according to claim 1, characterized in that: The feed end of the primary screening box (21) extends to the outside of the main frame (1). The feed end of the primary screening box (21) is provided with a drive beam (231). A slide plate (232) is slidably provided on the drive beam (231). The first drive component includes a drive wheel (234) and a first drive motor (233) for driving the drive wheel (234) to rotate around its own axis. An eccentric shaft (2342) is provided on the drive wheel (234). The lower end of the eccentric shaft (2342) is inserted into the slide plate (232). When the drive wheel (234) rotates under the drive of the first drive motor (233), the eccentric shaft (2342) can drive the primary screening box (21) to reciprocate.

5. The non-destructive insect feed separation device according to claim 1, characterized in that: It also includes a conveying auger (41) and a second driving component for driving the conveying auger (41) to rotate. The conveying auger (41) is located inside the primary screening box (21). There is a gap between the outer edge of the spiral blade (412) of the conveying auger (41) and the inner surface of the arc-shaped part (211) of the primary screening box (21). The conveying direction of the conveying auger (41) is opposite to the discharge direction of the primary screening box (21).

6. The non-destructive insect feed separation device according to claim 5, characterized in that: A drying chamber (42) with a closed top and an open bottom is provided on the main frame (1) above the primary screening chamber (21), and the drying chamber (42) and the primary screening chamber (21) together form a drying cavity. An air inlet is provided on the top of the drying chamber (42), and the air inlet is connected to a fan through a pipe.

7. The non-destructive insect feed separation device according to claim 6, characterized in that: A first baffle (424) is provided at one end of the drying chamber (42) near the feed side. The first baffle (424) and the primary screening chamber (21) form a material passage gap for controlling the feed thickness. A second baffle (425) is provided at one end of the drying chamber near the discharge side. The second baffle (425) and the primary screening chamber (21) form a discharge gap.

8. The non-destructive insect feed separation device according to claim 7, characterized in that: The conveying auger (41) has a buffer space between its spiral blades (412) and the first baffle (424).

9. The non-destructive insect feed separation device according to claim 7, characterized in that: The two ends of the shaft (411) of the conveying auger (41) are rotatably connected to the first baffle (424) and the second baffle (425) respectively. The second drive motor (44) is mounted on the second baffle (425) through the second motor seat (45). The end of the shaft (411) of the conveying auger (41) passes through the second motor seat (45) and is connected to the power output shaft of the second drive motor (44).

10. The non-destructive insect feed separation device according to claim 6, characterized in that: Each air inlet is provided with a fabric hood (43). The air inlet end of the fabric hood (43) passes through the top plate (422) of the drying chamber (42) and is fixedly connected to the top plate (422) of the drying chamber (42) by a fixing nut (431). The air outlet end of the fabric hood (43) is provided with multiple air outlet holes.

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