A deep-grained walnut floating extrusion shelling system based on laser pre-cracks

Abstract

The present invention belongs to the field of fruit processing technology and provides a deep-grained walnut floating extrusion shelling system based on laser pre-crack formation. The system comprises a crack pre-forming unit, including a chain transmission assembly, with laser heads disposed on either side of the chain transmission assembly's feed end. The two sets of laser heads are staggered along the chain transmission assembly's conveying direction, and the two laser heads are vertically adjustable in height. A shelling unit comprises a roller support, to which a roller is rotatably connected, with a plurality of lower extrusion assemblies equally spaced on the roller's sidewalls. A lower pressure assembly is disposed on the top of the roller support, and a plurality of spring seats are disposed at the bottom of the lower pressure assembly along the roller's axis. Floating extrusion assemblies are disposed at the bottom of each of the spring seats. The floating extrusion assemblies and the lower extrusion assemblies are used to squeeze the walnuts to crack their shells. The present invention can precisely pre-form cracks on the walnut surface and effectively squeeze the walnuts to crack their shells, effectively reducing the kernel breakage rate during shelling and ensuring a high kernel exposure rate.

Description

Technical Field

[0001] The invention belongs to the technical field of forestry and fruit processing, and in particular relates to a deep-grained walnut floating extrusion shelling system based on laser prefabricated cracks. Background Art

[0002] Walnuts are a popular nut with a high nutritional value. However, their shells are hard and difficult to peel. Traditional manual shelling methods are inefficient and can damage the kernels. Yunnan's deep-grained walnuts, primarily cultivated in the Yangbi and Santai varieties, are particularly prone to deep-grained shells, irregular shapes, and brittle kernels. While existing mechanical shelling devices have improved shelling efficiency to some extent, they still suffer from issues such as incomplete shelling, high kernel breakage rates, and low kernel exposure rates. Summary of the Invention

[0003] The purpose of the present invention is to provide a deep-grained walnut floating extrusion shelling system based on laser pre-cracks to solve the above-mentioned problems, so as to achieve the purpose of accurately pre-forming cracks on the walnut surface and effectively extruding the walnut to break the shell, reducing the broken kernel rate and increasing the exposed kernel rate.

[0004] To achieve the above objectives, the present invention provides the following solution: a deep-grained walnut floating extrusion shelling system based on laser pre-cracks, comprising:

[0005] A crack prefabrication unit includes a chain transmission assembly for conveying walnuts, and laser heads are respectively provided on both sides near the feeding end of the chain transmission assembly. The two groups of laser heads are staggered along the conveying direction of the chain transmission assembly, and the heights of the two laser heads can be adjusted vertically. The laser heads are used to prefabricate cracks on the surface of the walnuts;

[0006] The extrusion shell breaking unit includes a roller bracket, which is rotatably connected to the roller via a driving member, and a plurality of lower extrusion assemblies are evenly spaced on the side wall of the roller. A downward pressure assembly is provided on the top of the roller bracket, and a plurality of spring seats are provided at the bottom of the downward pressure assembly along the axis of the roller. Floating extrusion assemblies are respectively provided at the bottom of the plurality of spring seats. The floating extrusion assembly and the lower extrusion assembly are used to squeeze walnuts to break their shells, and the lower extrusion assembly is connected to the discharge end of the chain transmission assembly through an intermediate discharge assembly.

[0007] Preferably, it further comprises a cabinet, and the chain transmission assembly is arranged on the cabinet;

[0008] The chain transmission assembly includes a driving sprocket and a driven sprocket rotatably connected to the cabinet body, a conveyor chain is wound around the driving sprocket and the driven sprocket, and a plurality of walnut positioning molds are fixedly connected to the outer surface of the conveyor chain. The walnut positioning molds are used to make the walnuts move with the conveyor chain.

[0009] Preferably, two groups of laser tubes are further provided on the cabinet, and the two laser tubes are respectively located on both sides of the conveyor chain, and the two laser tubes are arranged parallel to the conveyor chain. One end of the two groups of laser tubes is fixedly connected to the two laser heads through fixed laser head plates, and the laser tubes are fixedly connected to the cabinet through two groups of laser tube brackets. An upper and lower sliding module is provided in the laser tube bracket, and the upper and lower sliding modules are used to adjust the height and pitch angle of the laser tube.

[0010] Preferably, the lower extrusion assembly includes a plurality of lower extrusion heads, which are fixedly connected to the side wall of the roller at intervals along the axis of the roller. A groove is provided at one end of the lower extrusion head away from the roller, and the groove is used to place walnuts.

[0011] Preferably, the floating extrusion assembly includes a spring, one end of the spring is fixedly connected to the bottom of the spring seat, and the other end of the spring is threadedly sleeved with an upper extrusion head, and several of the upper extrusion heads are respectively arranged corresponding to several of the lower extrusion heads.

[0012] Preferably, the pressing assembly includes a cylinder vertically fixedly connected to the top of the roller bracket, the telescopic end of the cylinder is fixedly connected to a connecting plate, the connecting plate is located between the cylinder and the roller, and several spring seats are fixedly connected to the bottom of the connecting plate.

[0013] Preferably, it also includes a loading component, which includes a first feed hopper, the bottom discharge port of the first feed hopper is connected to one end of a discharge guide rail, the other end of the discharge guide rail is arranged corresponding to the feed end of the conveyor chain, and a visual sensor is fixedly connected to the side wall of the discharge guide rail.

[0014] Preferably, a pneumatic brush is fixedly connected to the top of the cabinet, and the pneumatic brush is arranged between the discharge guide rail and the laser head. The pneumatic brush is used for cleaning and positioning walnuts.

[0015] Preferably, the intermediate discharging assembly includes a second feed hopper, the top opening of the second feed hopper is arranged corresponding to the discharging end of the conveying chain, the bottom opening of the second feed hopper is connected to a plurality of U-shaped conveying rails, the U-shaped conveying rails are arranged at an angle, and the lower ends of the plurality of U-shaped conveying rails are respectively arranged corresponding to the plurality of lower extrusion heads.

[0016] Compared with the existing technology, the present invention has the following advantages and technical effects: the main function of the chain transmission assembly is to transport the walnuts into the downward extrusion assembly; the main function of the two sets of laser heads is to pre-form cracks on both sides of the walnuts' surfaces as they pass through the laser heads, achieving the purpose of pre-forming cracks in a full 360° circumferential cut; the main function of the roller is to drive the multiple lower extrusion assemblies to connect with the intermediate discharge assembly in sequence, and to complete the pressure cracking of the pre-cracked walnuts in sequence, thus achieving continuous production; the main function of the lower pressure assembly is to drive the floating extrusion assembly to move toward the lower extrusion assembly to achieve extrusion of the walnuts; the main function of the floating extrusion assembly is to achieve extrusion cracking of the walnuts by moving toward the lower extrusion assembly. Overall, the present invention uses a laser sliding-extrusion shell-breaking process for walnuts, achieving optimal shell-breaking effect by pre-forming cracks, while improving the shell-breaking effect of the walnuts, effectively reducing the kernel breakage rate during the production process, and ensuring a high kernel exposure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the shell breaking system of the present invention;

[0019] Figure 2 This is a left view of the extrusion shell breaking unit of the present invention;

[0020] Figure 3 It is a front view of the lower extrusion assembly and the floating extrusion assembly of the present invention;

[0021] Figure 4 Schematic diagram of the roller of the present invention;

[0022] Figure 5 This is a left view of the crack prefabrication unit of the present invention;

[0023] Figure 6 This is a top view of the crack prefabrication unit of the present invention;

[0024] Figure 7 A top view of the feeding assembly of the present invention;

[0025] Figure 8 It is a left side view of the feeding assembly of the present invention;

[0026] Figure 9 Schematic diagram of the laser tube bracket of the present invention;

[0027] Among them, 1. First feed hopper; 2. Feed hopper frame; 3. Discharge guide rail; 4. Pneumatic brush; 5. Motor; 6. Driving sprocket; 7. Laser head; 8. Fixed laser head plate; 9. Stand; 10. Walnut positioning mold; 11. Laser tube cover; 12. Conveyor chain; 13. Chiller; 14. Driven sprocket; 15. Fixed sprocket frame; 16. Second feed hopper; 17. U-shaped conveyor track; 18. Second frame; 19. Cylinder; 20. Upper extrusion head; 21. Lower extrusion head; 22. Roller; 23. Roller bracket; 24. Partition; 25. Limit block; 26. Roller shaft; 27. Laser tube bracket; 28. Laser tube; 29. ​​Walnut; 30. Air compressor; 31. Cabinet; 32. Collection box; 33. Spring; 34. Visual sensor; 35. Push rod; 36. Auxiliary motor; 37. Spring seat; 38. Connecting plate; 39. Screw. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figures 1-9 The present invention provides a deep-grained walnut floating extrusion shelling system based on laser pre-cracks, comprising:

[0031] The crack prefabrication unit includes a chain transmission assembly for conveying walnuts 29. Laser heads 7 are respectively provided on both sides near the feeding end of the chain transmission assembly. The two groups of laser heads 7 are staggered along the conveying direction of the chain transmission assembly. The two laser heads 7 can be vertically adjusted in height. The laser heads 7 are used to prefabricate cracks on the surface of the walnuts 29.

[0032] The extrusion shell breaking unit includes a roller bracket 23, which is rotatably connected to the roller 22 through a driving member. Several lower extrusion assemblies are evenly spaced on the side wall of the roller 22. A downward pressure assembly is provided on the top of the roller bracket 23. Several spring seats 37 are provided at the bottom of the downward pressure assembly along the axis of the roller 22. Floating extrusion assemblies are respectively provided at the bottom of the several spring seats 37. The floating extrusion assembly and the lower extrusion assembly are used to squeeze the walnuts 29 to break their shells. The lower extrusion assembly is connected to the discharge end of the chain transmission assembly through the intermediate discharge assembly.

[0033] The main function of the chain transmission assembly is to convey the walnuts 29 into the downward extrusion assembly; the main function of the two sets of laser heads 7 is to pre-form cracks on both sides of the surface of the walnuts 29 as the walnuts 29 pass through the laser heads 7, achieving the purpose of 360° full-circumferential pre-formed cracks; the main function of the roller 22 is to drive the multiple lower extrusion assemblies to connect with the intermediate discharge assembly in sequence, and to sequentially complete the pressure cracking of the pre-cracked walnuts 29, thereby achieving continuous production; the main function of the lower pressure assembly is to drive the floating extrusion assembly to move toward the lower extrusion assembly to achieve extrusion of the walnuts 29; the main function of the floating extrusion assembly is to achieve extrusion cracking of the walnuts 29 by moving toward the lower extrusion assembly. Overall, the present invention uses a laser sliding-extrusion shell-breaking process for walnuts, achieving optimal shell-breaking results by pre-forming cracks, while improving the shell-breaking effect, effectively reducing the kernel breakage rate during the production process, and ensuring a high kernel exposure rate.

[0034] A further optimized solution further includes a process control unit, which is used to control the operation of the chain transmission component, the laser head 7, the driving component and the pressing component.

[0035] A further optimized solution further includes a cabinet 31, on which the chain transmission assembly is disposed;

[0036] The chain transmission assembly includes a driving sprocket 6 and a driven sprocket 14 rotatably connected to the cabinet body 31, a conveyor chain 12 is wound around the driving sprocket 6 and the driven sprocket 14, and a plurality of walnut positioning molds 10 are fixedly connected to the outer surface of the conveyor chain 12. The walnut positioning molds 10 are used to make the walnuts 29 move with the conveyor chain 12.

[0037] like Figure 1 As shown, the main function of the walnut positioning mold 10 is to adjust and fix the position of the walnuts, realize batch positioning of the walnuts 29 on the conveyor chain 12, and ensure that the walnuts 29 do not move during the laser cutting process.

[0038] To further optimize the solution, the cabinet 31 is fixedly installed at the production site through the stand 9.

[0039] Further optimization scheme, such as Figure 1 Shown, cabinet 31 is fixedly connected with motor 5, and the output shaft of motor 5 is in driving connection with driving sprocket 6. Drive driving sprocket 6 is rotated by motor 5, and the top of conveyor chain 12 is realized to convey walnut 29 to the middle discharging assembly.

[0040] According to a further optimized solution, the driving sprocket 6 and the driven sprocket 14 are rotatably connected to the cabinet body 31 via a fixed sprocket frame 15 .

[0041] To further optimize the solution, two groups of laser tubes 28 are further provided on the cabinet 31. The two laser tubes 28 are respectively located on both sides of the conveyor chain 12, and the two laser tubes 28 are arranged parallel to the conveyor chain 12. One end of the two groups of laser tubes 28 is fixedly connected to the two laser heads 7 through a fixed laser head plate 8. The laser tubes 28 are fixedly connected to the cabinet 31 through two groups of laser tube brackets 27. The laser tube bracket 27 is provided with an upper and lower sliding module, which is used to adjust the height and pitch angle of the laser tube 28.

[0042] Further optimization scheme, such as Figure 1 and Figure 5 As shown, two groups of laser tube covers 11 are detachably connected to the cabinet 31. The main function of the two laser tube covers 11 is to cover the two groups of laser tubes 28 and protect the laser tubes 28 during the production process.

[0043] like Figure 9 As shown, the upper and lower sliding modules include a push rod 35 vertically slidably connected to the laser tube bracket 27 and an auxiliary motor 36 embedded in the laser tube bracket 27. The output end of the auxiliary motor 36 is coaxially fixedly connected to a screw rod 39. The top of the screw rod 39 passes through the bottom of the push rod 35 and is threadedly connected to the push rod 35.

[0044] like Figure 5 and Figure 6 As shown, the laser tube bracket 27 is respectively mounted on the front and rear ends of the laser tube 28. The operation of each auxiliary motor 36 is controlled by the process control unit, and the lifting and lowering of each push rod 35 can be controlled respectively, thereby changing the height and pitch angle of the laser tube 28, thereby coordinating the cutting posture of the laser head 7 according to the size of the walnut, so that each laser head 7 can achieve precise staggered pre-cracks.

[0045] To further optimize the solution, a chiller 13 and an air compressor 30 are provided. The chiller 13 and the air compressor 30 are respectively connected to the laser tube 28. The chiller 13 cools the laser tube 28, and the air compressor 30 provides carbon dioxide inert gas to the laser tube 28 during the cutting process to ensure the light output, cutting effect and normal operation of the laser cutting machine.

[0046] A further optimized solution is that the lower extrusion assembly includes a plurality of lower extrusion heads 21, which are fixedly connected to the side wall of the roller 22 at intervals along the axis of the roller 22. A groove is provided at one end of the lower extrusion head 21 away from the roller 22, and the groove is used to place the walnuts 29.

[0047] Further optimization scheme, such as Figure 4 As shown, two groups of limit blocks 25 are fixedly connected to the outer wall of the lower extrusion head 21 , and the two limit blocks 25 are symmetrically arranged about the axis of the lower extrusion head 21 .

[0048] To further optimize the solution, the floating extrusion assembly includes a spring 33, one end of the spring 33 is fixedly connected to the bottom of the spring seat 37, and the other end of the spring 33 is threadedly sleeved with an upper extrusion head 20, and several upper extrusion heads 20 are respectively arranged corresponding to several lower extrusion heads 21.

[0049] like Figure 3 As shown, by rotating the upper extrusion head 20, the upper extrusion head 20 can be moved up and down along the spring 33, thereby adjusting the distance between it and the spring seat 37, thereby achieving precise adjustment of the loading force, and performing highly precise shelling operations on pre-cracked walnuts, generating stress concentration at the laser pre-cracks, so that the walnut shells are evenly cracked.

[0050] As a further optimization solution, a claw-shaped structure is provided at the bottom of the upper extrusion head 20, and the claw-shaped structure can adaptively fit the surface of the walnut body.

[0051] The bottom of the upper extrusion head 20 is designed with protrusions or grooves that match the cracks of the walnuts to guide the extrusion force to act along the direction of the cracks and reduce the kernel breakage rate.

[0052] The claw-shaped structure can be formed by using a limit block to be fixedly connected to the side wall of the upper extrusion head 20, and can specifically be a two-claw or three-claw structure.

[0053] To further optimize the solution, the downward pressure assembly includes a cylinder 19 vertically fixedly connected to the top of the roller bracket 23, the telescopic end of the cylinder 19 is fixedly connected to a connecting plate 38, the connecting plate 38 is located between the cylinder 19 and the roller 22, and several spring seats 37 are fixedly connected to the bottom of the connecting plate 38.

[0054] like Figure 3 and Figure 4 As shown, the cylinder 19 extends the telescopic rod, driving the upper extrusion heads 20 to descend through the connecting plate 38, squeezing the walnuts in the lower extrusion heads 21 located on the top of the roller 22, causing the walnuts 29 to crack and achieve shelling of the walnuts 29.

[0055] According to a further optimization scheme, the roller 22 is rotatably connected to the roller bracket 23 via the roller shaft 26 , and the driving member includes a driving motor (not shown in the figure), which is fixedly connected to the roller bracket 23 and is in transmission connection with the roller shaft 26 .

[0056] The driving motor can drive the roller 22 to rotate step by step according to the production rhythm to achieve continuous production.

[0057] A further optimization scheme also includes a loading component, which includes a first feed hopper 1. The bottom discharge port of the first feed hopper 1 is connected to one end of a discharge guide rail 3, and the other end of the discharge guide rail 3 is arranged corresponding to the feed end of the conveyor chain 12. A visual sensor 34 is fixedly connected to the side wall of the discharge guide rail 3.

[0058] To further optimize the solution, the first feed hopper 1 is fixed at the production site through the feed hopper frame 2.

[0059] The main function of the visual sensor 34 is to determine whether a walnut 29 passes through and to determine the shape of the walnut 29 so that the process control system can adjust the supporting position of the laser tube 28 by the laser tube bracket 27 accordingly.

[0060] To further optimize the solution, a pneumatic brush 4 is fixedly connected to the top of the cabinet 31 , and the pneumatic brush 4 is arranged between the discharge guide rail 3 and the laser head 7 . The pneumatic brush 4 is used for cleaning and positioning the walnuts 29 .

[0061] The pneumatic brush 4 is mainly used for positioning and cleaning walnuts. The brush head of the pneumatic brush 4 can place the walnuts in an orderly and directionally manner in the walnut positioning mold 10. The softness and adaptability of the brush head can easily handle the irregular shape of the walnuts and accurately guide them into the walnut positioning mold 10.

[0062] To further optimize the solution, the intermediate discharging assembly includes a second feed hopper 16, the top opening of the second feed hopper 16 is arranged corresponding to the discharging end of the conveyor chain 12, and the bottom opening of the second feed hopper 16 is connected to a plurality of U-shaped conveying rails 17, the U-shaped conveying rails 17 are arranged at an angle, and the lower ends of the plurality of U-shaped conveying rails 17 are respectively arranged corresponding to a plurality of lower extrusion heads 21.

[0063] To further optimize the solution, the second feed hopper 16 is fixed to the production site through the second frame 18 , and a partition 24 is further provided between the lower end of the U-shaped conveying track 17 and the lower extrusion head 21 .

[0064] Further optimizing scheme, roller 22 is provided with collecting box 32 on one side away from U-shaped conveying track 17. The main function of collecting box 32 is to collect the walnut with broken shell that falls from roller 22.

[0065] The working process of this embodiment is as follows:

[0066] Walnuts are poured into the first feed hopper 1 in batches and arrive at the front end of the discharge guide rail 3, triggering the visual sensor 34. The pneumatic brush 4 and laser tube 28 are then activated, and the laser head 7 is coordinated with the scoring posture according to the size of the walnuts, so that the multi-laser head 7 can achieve precise misaligned pre-cracks. The brush head of the pneumatic brush 4 rotates to clean the walnuts and ensure that they fall into the walnut positioning mold 10 in an orderly and well-directed manner. Subsequently, the walnuts 29 are driven by the conveyor chain 12, and the laser head 7 completes the 360° full-circle pre-crack treatment of the walnut shells under the action of the laser head 7, ensuring the quality and distribution of the shell cracks. The walnuts 29 then fall from the end of the conveyor chain 12 into the second feed hopper 16 and are accurately positioned by a number of U-shaped conveyor rails 17, so that the walnuts are accurately transported to the corresponding row of lower extrusion heads 21. As roller 22 rotates in steps, cylinder 19 lowers upper extrusion head 20 via connecting plate 38, precisely cracking the walnuts in the top row of lower extrusion heads 21. Subsequently, roller 22 rotates, causing the upper and lower extrusion heads of the next set of extrusion units to engage, ready to receive and execute the next extrusion command. The cracked walnuts fall into collection bin 32.

[0067] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0068] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A deep-grained walnut floating extrusion shelling system based on laser pre-cracks, characterized in that: include: A crack prefabrication unit comprises a chain transmission assembly, the chain transmission assembly is used to convey walnuts (29), laser heads (7) are respectively arranged on both sides close to the feeding end of the chain transmission assembly, two groups of laser heads (7) are staggered along the conveying direction of the chain transmission assembly, the heights of the two laser heads (7) can be adjusted vertically, and the laser heads (7) are used to prefabricate cracks on the surface of the walnuts (29); An extrusion shell breaking unit comprises a roller support (23), the roller support (23) is rotatably connected to a roller (22) via a driving member, a plurality of lower extrusion assemblies are evenly spaced on the side wall of the roller (22), a downward pressing assembly is provided on the top of the roller support (23), a plurality of spring seats (37) are provided at the bottom of the downward pressing assembly along the axis of the roller (22), and a floating extrusion assembly is respectively provided at the bottom of the plurality of spring seats (37), the floating extrusion assembly and the lower extrusion assembly are used to squeeze the walnuts (29) to break their shells, and the lower extrusion assembly is connected to the discharge end of the chain transmission assembly via an intermediate discharge assembly; It also includes a cabinet (31), and the chain transmission assembly is arranged on the cabinet (31); The chain transmission assembly comprises a driving sprocket (6) and a driven sprocket (14) rotatably connected to the cabinet (31); a conveyor chain (12) is wound between the driving sprocket (6) and the driven sprocket (14); a plurality of walnut positioning molds (10) are fixedly connected to the outer surface of the conveyor chain (12); the walnut positioning molds (10) are used to enable the walnuts (29) to move along with the conveyor chain (12); The lower extrusion assembly comprises a plurality of lower extrusion heads (21), the plurality of lower extrusion heads (21) being fixedly connected to the side wall of the roller (22) at intervals along the axis of the roller (22), and a groove is formed at one end of the lower extrusion head (21) away from the roller (22), the groove being used to place the walnut (29); The floating extrusion assembly includes a spring (33), one end of the spring (33) is fixedly connected to the bottom of the spring seat (37), and the other end of the spring (33) is threadedly sleeved with an upper extrusion head (20), and a plurality of the upper extrusion heads (20) are respectively arranged corresponding to the plurality of the lower extrusion heads (21); The intermediate discharge assembly includes a second feed hopper (16), the top opening of the second feed hopper (16) is arranged corresponding to the discharge end of the conveyor chain (12), and the bottom opening of the second feed hopper (16) is connected to a plurality of U-shaped conveyor rails (17), the U-shaped conveyor rails (17) are arranged at an angle, and the lower ends of the plurality of U-shaped conveyor rails (17) are respectively arranged corresponding to the plurality of lower extrusion heads (21).

2. The deep-grained walnut floating extrusion shelling system based on laser pre-cracks according to claim 1 is characterized by: Two groups of laser tubes (28) are further provided on the cabinet (31), the two laser tubes (28) are respectively located on both sides of the conveyor chain (12), and the two laser tubes (28) are arranged in parallel with the conveyor chain (12), one end of the two groups of laser tubes (28) is fixedly connected to the two laser heads (7) through a fixed laser head plate (8), and the laser tubes (28) are fixedly connected to the cabinet (31) through two groups of laser tube brackets (27), and an upper and lower sliding module is provided in the laser tube bracket (27), and the upper and lower sliding module is used to adjust the height and pitch angle of the laser tube (28).

3. The deep-grained walnut floating extrusion shelling system based on laser pre-cracks according to claim 1 is characterized by: The pressing assembly includes a cylinder (19) vertically fixedly connected to the top of the roller bracket (23), the telescopic end of the cylinder (19) is fixedly connected to a connecting plate (38), the connecting plate (38) is located between the cylinder (19) and the roller (22), and a plurality of spring seats (37) are fixedly connected to the bottom of the connecting plate (38).

4. The deep-grained walnut floating extrusion shelling system based on laser pre-cracks according to claim 1 is characterized by: The invention also includes a feeding assembly, which includes a first feeding hopper (1), a bottom discharge port of the first feeding hopper (1) is connected to one end of a discharge guide rail (3), the other end of the discharge guide rail (3) is arranged corresponding to the feeding end of the conveyor chain (12), and a visual sensor (34) is fixedly connected to the side wall of the discharge guide rail (3).

5. The deep-grained walnut floating extrusion shelling system based on laser pre-cracks according to claim 4 is characterized by: A pneumatic brush (4) is fixedly connected to the top of the cabinet (31), and the pneumatic brush (4) is arranged between the discharge guide rail (3) and the laser head (7). The pneumatic brush (4) is used for cleaning and positioning the walnuts (29).

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