Equipment for removing netting from crab shells
By setting up stripping rollers, winding rods, separation boxes and other structures in the crab shell netting equipment, the problem of difficult removal of net impurities during crab shell processing is solved, the efficient separation of crab shells and nets is achieved, and production efficiency is improved.
Patent Information
- Application Number
- CN202510761320.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-09
- Publication Date
- 2025-09-09
AI Technical Summary
In the prior art, during the crab shell processing process, it is difficult to effectively remove impurities in the net, resulting in low production efficiency.
A crab shell and net removal equipment is designed. By setting multiple functional areas along the height direction of the frame and utilizing structures such as stripping rollers, winding rods and separation boxes, efficient separation of crab shells and nets is achieved.
It effectively removes the net impurities on the surface of the crab shell, improves processing efficiency, and facilitates the subsequent extraction of chitin.
Smart Images
Figure CN120607019A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of chitin raw material processing, and in particular relates to a crab shell netting device. Background Art
[0002] Chitin, also known as chitin polysaccharide or chitin, is a natural macromolecular polymer composed of β-(1-4)-glycosidic bonds. It is the most abundant organic polymer in nature, after cellulose. It is primarily derived from the exoskeletons of crustaceans, such as shrimp and crab shells. (These wet scraps are often contaminated with impurities such as netting, requiring de-netting before processing.) Due to their unique physicochemical properties, including excellent biocompatibility, biodegradability, antibacterial properties, and renewability, chitin and its derivatives have shown tremendous potential for application in a variety of fields, including medicine, food, agriculture, and textiles.
[0003] Chitosan is commonly extracted industrially using chemical methods, with shrimp and crab shells as raw materials. The traditional process is as follows: first, decalcification is achieved through acid treatment to remove the calcium carbonate component in the raw materials; then, residual acid is thoroughly removed through multiple water washes; then, alkaline solution treatment is used to complete the deproteinization step; and finally, the chitosan product is obtained by water washing again and drying.
[0004] During the concentrated crab fishing season, drift nets are the main method of catching swimming crabs. However, the barbed structure on the crab's body surface can easily cause the net to become entangled. During subsequent processing, the wet crab shell material mixed with a large amount of net impurities will form a layer of impurities that are stubbornly attached and difficult to remove. Since net removal is a key pre-process for chitin processing, this impurity problem seriously restricts production efficiency. The present invention specifically proposes a crab shell net removal device, which aims to efficiently remove these stubborn net impurities and overcome the industry's pain points. Summary of the Invention
[0005] The purpose of the present invention is to provide a crab shell netting device, which is provided with a plurality of different functional areas along the height direction of the frame, so as to separate the crab shell and the net to the greatest extent and facilitate subsequent processing.
[0006] To achieve the above object, the present invention provides the following technical solutions: A crab shell netting device comprises a frame, a fixing plate welded on the top of the frame, two fixing plates are symmetrically arranged about the middle of the frame, and a stripping mechanism is fixed between the two fixing plates; The peeling mechanism includes a fixed frame fixed between the fixed plates, a rotating shaft is rotatably connected inside the fixed frame, a peeling roller is coaxially fixed on the rotating shaft, one end of the rotating shaft is connected to a drive motor, and the drive motor is mounted on the fixed plate; A feed inlet is fixed to the top of the fixed frame with screws. A housing is fixed to the side of the frame. The housing is located below the fixed frame. The inner wall of the housing is stepped. A wire winding mechanism is rotatably connected inside the housing. There are several wire winding mechanisms inside the housing. The several wire winding mechanisms fit the shape of the inner wall of the housing and are arranged in a stepped manner. A re-separation mechanism is fixed to the side of the frame. The re-separation mechanism can re-separate the crab shell and the netting.
[0007] As a preferred solution of the present invention, a groove is provided on one side of the feed inlet.
[0008] As a preferred solution of the present invention, a number of cutting knives are provided outside the peeling roller. The cutting knives are arranged in a staggered manner along the axis direction of the peeling roller.
[0009] As a preferred solution of the present invention, partition plates are fixed inside the fixed frame. The partition plates are provided in several numbers at equal intervals along the length direction of the fixed frame. A space between two partition plates is for the cutting knives to pass through.
[0010] As a preferred solution of the present invention, the wire winding mechanism includes a rotating shaft rotatably connected between the inner walls of the housing. A winding rod is coaxially fixed on the rotating shaft. The winding rod is provided in several numbers along the axis direction and the circumferential direction of the rotating shaft. One end of the rotating shaft extends out along one side of the housing and the extending end is fixed with a servo motor.
[0011] As a preferred solution of the present invention, the re-separation mechanism includes a separation box. An opening is provided on the side of the separation box away from the frame. Through grooves are provided on both sides of the separation box. An arc-shaped connecting plate is slidably connected inside the through grooves. The arc-shaped connecting plates are symmetrically arranged about the middle of the through grooves. A rotating rod is rotatably connected between the two arc-shaped connecting plates. A U-shaped rod is fixed to the outside of the rotating rod. The U-shaped rods are provided in several numbers along the circumferential direction of the rotating rod.
[0012] As a preferred solution of the present invention, a sliding rod is fixed to the end of the arc-shaped connecting plate away from the rotating rod. The sliding rod slides on the bottom of the through groove. A spring is sleeved outside the sliding rod. One end of the spring is fixed to the bottom of the through groove and the other end is fixed to the side of the arc-shaped connecting plate.
[0013] As a preferred solution of the present invention, both ends of the rotating rod extend out along the side of the arc-shaped connecting plate. The extending end of the rotating shaft abuts against a cam. A protective shell covers the side of the cam. One end of the protective shell is fixed to the frame. The cam is axially connected with a driving motor. The driving motor is screw-mounted on the side of the protective shell.
[0014] As a preferred embodiment of the present invention, the peeling roller includes a plurality of collars inserted on the rotating shaft and a fixed collar, the cutting knife is arranged on several of the collars, and the several collars with cutting knives are arranged at intervals, and the fixed collar can fix the collar on the rotating shaft.
[0015] As a preferred embodiment of the present invention, a threaded hole is radially formed on the fixed collar, the threaded hole extends into the rotating shaft, and a fixing screw is threadedly connected to the threaded hole.
[0016] In summary, the beneficial technical effects of the present invention are as follows: This equipment has multiple functional areas in the height direction of the frame. As the crab shell raw material and the netting fall under the action of gravity, they first pass through the peeling roller, and the netting is cut by the cutting knife on it. After passing through the winding rod, the broken netting is wound and collected. At the same time, finally, the rotating rod and the U-shaped rod inside the separation box are used for secondary collection of the netting, separating the crab shell and the netting to the greatest extent, facilitating subsequent processing. At the same time, the side of the outer shell facing the winding rod is open, and an opening is provided on the side of the separation box, facilitating the collection of crab shell scraps; In addition, the peeling roller is composed of several collars, and the position of the collar with a cutting knife can be replaced or more collars with cutting knives can be added according to needs, improving the cutting efficiency of the netting. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification, but do not constitute a limitation to the present invention. In the drawings: Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic diagram of the internal structure of the outer shell of the present invention; Figure 3 is a schematic diagram of the structure of the separation box of the present invention; Figure 4 is Figure 3 the enlarged schematic diagram at A in Figure 5 is a side view of the outer shell of the present invention; Figure 6 is a schematic structural diagram of Embodiment 2; Figure 7 is Figure 6 the schematic diagram of the structure of the peeling roller in Figure 8 is Figure 7 the cross-sectional view at B-B in Figure 9 is Figure 7 the cross-sectional view at C-C in
[0018] In the figure: 1, frame; 2, fixed plate; 3, fixed frame; 4, rotating shaft; 5, feed inlet; 6, outer shell; 7, separation box; 8, opening; 9, groove; 10, cutting knife; 11, partition board; 12, rotating shaft; 13, winding rod; 14, servo motor; 15, through groove; 16, arc connecting plate; 17, rotating rod; 18, U-shaped rod; 19, sliding rod; 20, spring; 21, cam; 22, protective shell; 23, drive motor; 24, drive motor; 25, peeling roller; 26, collar; 27, guiding strip; 28, guiding groove; 29, fixed collar; 30, threaded hole; 31, fixing screw. Specific implementation manner
[0019] The present invention will be further described in detail below with reference to the accompanying drawings.
[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Embodiment 1
[0021] Refer to Figure 1-5 , a crab shell de-netting device, including a frame 1, a fixed plate 2 is welded on the top of the frame 1, two fixed plates 2 are symmetrically arranged about the middle of the frame 1, a peeling mechanism is fixed between the two fixed plates 2, the peeling mechanism includes a fixed frame 3 fixed between the fixed plates 2, a rotating shaft 4 is rotatably connected inside the fixed frame 3, a peeling roller 25 is coaxially fixed on the rotating shaft 4, one end of the rotating shaft 4 is connected with a drive motor 23, the drive motor 23 is installed on the fixed plate 2, a feed inlet 5 is fixed to the top of the fixed frame 3 by screws, the side of the frame 1 is fixed with an outer shell 6, the outer shell 6 is located below the fixed frame 3, the inner wall of the outer shell 6 is stepped, and a winding mechanism is rotatably connected inside the outer shell 6, there are several winding mechanisms inside the outer shell 6, and the several winding mechanisms fit the shape of the inner wall of the outer shell 6 and are arranged in a stepped manner, and a re-separation mechanism for separating the crab shell and the netting again is fixed on the side of the frame 1, the re-separation mechanism includes a separation box 7, and an opening 8 is provided on the side of the separation box 7 away from the frame 1.
[0022] In this embodiment, a groove 9 is provided on one side of the feed inlet 5, and the depth of the groove 9 is half of the feed inlet 5, in order to facilitate the forklift to directly pour the crab shell raw material into the feed inlet 5, avoid the height being too high when feeding from above the feed inlet 5, and thus improve the safety of use.
[0023] Among them, after the caught crab (crab shell) is covered with a broken netting that is not easy to peel off, so the crab shell raw material carrying the netting enters through the feed inlet 5 and then falls into the inside of the fixed frame 3. A peeling roller 25 is provided inside the fixed frame 3, and several cutting knives 10 are provided outside the peeling roller 25, and the cutting knives 10 are arranged staggeredly along the axis direction of the peeling roller 25.
[0024] Specifically, a partition plate 11 is fixed inside the fixed frame 3. A plurality of partition plates 11 are equidistantly arranged along the length direction of the fixed frame 3. The space between two partition plates 11 is for the cutter 10 to pass through.
[0025] One end of the cutter 10 away from the peeling roller 25 is the cutting edge. After the above-mentioned material enters, with the driving motor turned on, the driving motor drives the peeling roller 25 to rotate, causing the cutter 10 to continuously rotate following the peeling roller 25, cutting off the netting covering the outside. At the same time, after the cutter 10 passes through the partition plate 11, since only the cutter 10 is allowed to pass between the partition plates 11, the cut netting is blocked by the partition plate 11 and falls to the area of the outer shell 6 below the fixed frame 3.
[0026] The driving motor is a motor belt drive structure.
[0027] The broken netting and the cut crab shell scraps that fall into the area of the outer shell 6 slide down along the inner wall of the outer shell 6. The inner wall of the outer shell 6 is in a stepped state, so the above two raw materials are guided to the winding mechanism at each step.
[0028] Specifically, the winding mechanism includes a rotating shaft 12 rotatably connected between the inner walls of the outer shell 6. A winding rod 13 is fixed outside the rotating shaft 12. A plurality of winding rods 13 are arranged along the axis direction and the circumferential direction of the rotating shaft 12. One end of the rotating shaft 12 extends out along one side of the outer shell 6, and a servo motor 14 is fixed at the extended end.
[0029] While feeding the material, turn on the above-mentioned servo motor 14. In this embodiment, two winding mechanisms are provided up and down, and then turn on the two servo motors 14 synchronously. The servo motor 14 drives the rotating shaft 12 to rotate. When the rotating shaft 12 rotates, it带动 the winding rod 13 outside it to rotate. When the netting and the crab shell scraps slide down along the inner wall of the outer shell 6, they contact the winding rod 13. Since the netting is light in mass and easy to wind after being cut, and the crab shell scraps do not have a winding support point, when passing by, the netting is wound on the winding rod 13 and stays, thus separating the crab shell scraps from the netting.
[0030] The separated crab shell scraps automatically slide down along the inner wall of the outer shell 6 to the separation box 7 at the bottom. Through grooves 15 are provided on both sides of the separation box 7. An arc-shaped connecting plate 16 is slidably connected inside the through grooves 15. The arc-shaped connecting plates 16 are symmetrically arranged about the middle of the through grooves 15. A rotating rod 17 is rotatably connected between the two arc-shaped connecting plates 16. A U-shaped rod 18 is fixed outside the rotating rod 17. A plurality of U-shaped rods 18 are arranged along the circumferential direction of the rotating rod 17.
[0031] A sliding rod 19 is fixed at the end of the arc-shaped connecting plate 16 away from the rotating rod 17. The sliding rod 19 slides at the bottom of the through groove 15. A spring 20 is sleeved outside the sliding rod on 19. One end of the spring 20 is fixed at the bottom of the through groove 15, and the other end is fixed on the side surface of the arc-shaped connecting plate 16.
[0032] Meanwhile, both ends of the rotating rod 17 extend along the side surface of the arc-shaped connecting plate 16. The protruding end of the rotating shaft 12 abuts against a cam 21. A protective shell 22 covers the side surface of the cam 21. One end of the protective shell 22 is fixed on the frame 1. The cam 21 is axially connected to a driving motor 24, and the driving motor 24 is installed on the side surface of the protective shell 22 with screws.
[0033] There is a rotating connection between the arc-shaped connecting plate 16 and the rotating rod 17. The rotating rod 17 can automatically rotate after the C-shaped rod 18 is abutted and rotated.
[0034] After the driving motor 23 is turned on, the driving motor 23 can drive the cam 21 to rotate. Then, the cam 21 intermittently abuts against the rotating rod 17. When the cam 21 abuts against the rotating rod 17, it drives the rotating rod 17 to move upward along the inside of the through groove 15. While moving upward, the sliding rod 19 above the rotating rod 17 slides toward the inside of the through groove 15, and the sliding rod 19 below the rotating rod 17 slides toward the outside of the through groove 15. At the same time, the spring 20 above the rotating rod 17 is compressed, and the spring 20 below the rotating rod 17 is stretched. Then, when the cam 21 does not abut against the rotating rod 17, under the elastic return of the two springs 20, the rotating rod 17 automatically resets. When the driving motor 24 continuously operates, the rotating rod 17 moves in an up-and-down vibrating manner. At the same time, after the dropped crab shell scraps contact the C-shaped rod 18, they drive the rotating rod 17 to rotate. Then, the rotating rod 17 rotates and vibrates up and down at the same time, further separating the crab scraps from the netting. The crab shell scraps are shaken off to the bottom of the separation box 7 and collected along the opening 8, and the remaining netting stays on the C-shaped rod 18.
[0035] The working principle of the present invention: There are multiple functional areas in the height direction. As the crab shell raw materials and the netting drop under the action of gravity, they first pass through the peeling roller 25, and the netting is cut by the cutter 10 thereon. After passing through the winding rod 13, the broken netting is wound and collected. At the same time, finally, the netting is collected again through the rotating rod 17 and the C-shaped rod 18 inside the separation box 7, separating the crab shells and the netting to the greatest extent, facilitating subsequent processing. At the same time, the side of the outer shell 6 facing the winding rod 13 is open, and an opening 8 is provided on the side of the separation box 7, facilitating the collection of crab shell scraps. Embodiment Two
[0036] Reference Figure 6-9 , the peeling roller 25 includes a plurality of collar rings 26 inserted on the rotating shaft 4 and a fixed collar ring 29. The cutter 10 is circumferentially arranged on several of the collar rings 26. The several collar rings 26 with cutters 10 are arranged at intervals. The fixed collar ring 29 can fix the collar rings 26 on the rotating shaft 4. Preferably, two collar rings 26 with cutters 10 can be combined into a cutting group, and the cutters 10 on the two collar rings 26 are arranged staggeredly. Then, a plurality of cutting groups are provided and arranged at intervals between several collar rings 26 in turn.
[0037] The number of the rings 26 with cutters can be increased or decreased according to the number of nets on the crab shells to cut the nets as much as possible while avoiding excessive chopping of the crab shells. When the crab shells are excessively chopped, they will become small flakes after subsequent drying, affecting collection and causing certain waste.
[0038] In this embodiment, the shaft sleeve at one end of the shaft 4 is detachable, and the gear box at the other end connected to the output shaft of the drive motor 23 is also detachable, which makes it easy to remove the shaft 4 and replace the position and number of the rings 26.
[0039] In this embodiment, a threaded hole 30 is radially opened on the fixing ring 29, and the threaded hole 30 extends into the rotating shaft 4. A fixing screw 31 is threadedly connected to the threaded hole 30. The fixing ring 29 is fixed to the rotating shaft 4 by the fixing screw 31, which plays a role in limiting and fixing the ring 26 to prevent the ring 26 from axial movement.
Claims
1. A crab shell netting device, characterized in that: It includes a frame (1), on the top of the frame (1), there are two fixing plates (2) welded symmetrically about the middle of the frame (1), and a peeling mechanism is fixed between the two fixing plates (2). The peeling mechanism includes a fixing frame (3) fixed between the fixing plates (2), a rotating shaft (4) is rotatably connected inside the fixing frame (3), a peeling roller (25) is coaxially fixed on the rotating shaft (4), one end of the rotating shaft (4) is connected to a driving motor (23), and the driving motor (23) is installed on the fixing plate (2). On the top of the fixing frame (3), a feed inlet (5) is fixed by screws. On the side of the frame (1), there is a housing (6) fixed. The housing (6) is located below the fixing frame (3). The inner wall of the housing (6) is stepped. Inside the housing (6), a winding mechanism is rotatably connected. There are several winding mechanisms inside the housing (6), and the several winding mechanisms fit the shape of the inner wall of the housing (6) and are arranged in a stepped manner. On the side of the frame (1), a re-separation mechanism is fixed, and the re-separation mechanism can re-separate the crab shell and the netting.
2. The crab shell netting device according to claim 1, characterized in that: There is a groove (9) on one side of the feed inlet (5).
3. The crab shell netting device according to claim 1, characterized in that: There are several cutting knives (10) outside the peeling roller (25), and the cutting knives (10) are arranged staggeredly along the axial direction of the peeling roller (25).
4. The crab shell netting device according to claim 3, characterized in that: Inside the fixing frame (3), there are partition plates (11) fixed. The partition plates (11) are arranged at equal intervals along the length direction of the fixing frame (3). The space between the two partition plates (11) is for the cutting knives (10) to pass through.
5. The crab shell netting device according to claim 1, characterized in that: The winding mechanism includes a rotating shaft (12) rotatably connected between the inner walls of the housing (6). A winding rod (13) is coaxially fixed on the rotating shaft (12). There are several winding rods (13) along the axial direction and the circumferential direction of the rotating shaft (12). One end of the rotating shaft (12) extends out along one side of the housing (6), and the extending end is fixed with a servo motor (14).
6. The crab shell netting device according to claim 1, characterized in that: The re-separation mechanism includes a separation box (7). There is an opening (8) on the side of the separation box (7) away from the frame (1). There are through grooves (15) on both sides of the separation box (7). Inside the through grooves (15), there is an arc-shaped connecting plate (16) slidably connected. The arc-shaped connecting plates (16) are symmetrically arranged about the middle of the through grooves (15). A rotating rod (17) is rotatably connected between the two arc-shaped connecting plates (16). There are several U-shaped rods (18) fixed on the outside of the rotating rod (17) along the circumferential direction of the rotating rod (17).
7. The crab shell netting device according to claim 6, characterized in that: The end of the arc-shaped connecting plate (16) away from the rotating rod (17) is fixed with a sliding rod (19). The sliding rod (19) slides at the bottom of the through groove (15). A spring (20) is sleeved outside the sliding rod (19). One end of the spring (20) is fixed at the bottom of the through groove (15), and the other end is fixed on the side of the arc-shaped connecting plate (16).
8. The crab shell netting device according to claim 6, characterized in that: Both ends of the rotating rod (17) extend along the side of the arc-shaped connecting plate (16), and the extended end of the rotating shaft (12) abuts against a cam (21). The side of the cam (21) is covered with a protective shell (22). One end of the protective shell (22) is fixed to the frame (1). The axis of the cam (21) is connected to a driving motor (24), and the driving motor (24) is screwed to the side of the protective shell (22).
9. The crab shell netting device according to claim 4, characterized in that: The peeling roller (25) comprises a plurality of sleeves (26) and a fixed sleeve (29) inserted on the rotating shaft (4); the cutter (10) is arranged on several of the sleeves (26); the plurality of sleeves (26) with the cutter (10) are arranged at intervals; and the fixed sleeve (29) can fix the sleeve (26) on the rotating shaft (4).
10. The crab shell netting device according to claim 9, characterized in that: A threaded hole (30) is radially provided on the fixing collar (29), the threaded hole (30) extending into the rotating shaft (4), and a fixing screw (31) is threadedly connected to the threaded hole (30).