A grading and screening device for quick-frozen lobster tail processing

Abstract

This invention belongs to the field of lobster tail processing technology, and mainly proposes a grading and screening device for quick-frozen lobster tail processing. It includes: a frame; a screening base plate disposed on the frame; a fixed frame disposed on the screening base plate; rotating rollers spaced apart and rotatably connected to the fixed frame, each rotating roller being equipped with several elastic elements, the elastic elements being spiral-shaped; a drive module mounted on the fixed frame; a feeding module disposed on one side of the frame; and a feeding pipe fixed to the screening base plate. This invention replaces the existing rigid spiral blades with flexible elastic elements. When the elastic elements come into contact with a stuck lobster tail, they deform. During this process, the elastic elements do not cause rigid compression of the lobster tail, thus reducing the probability of damage to the lobster tail shell and preventing damage to the meat inside, ensuring the integrity of the lobster tail.

Description

Technical Field

[0001] This invention relates to the field of lobster tail processing technology, and in particular to a grading and screening device for quick-frozen lobster tail processing. Background Technology

[0002] With the rapid development of the aquatic product processing industry, lobster tails, as one of the high value-added aquatic products, are increasingly in demand for processing and grading. The processing flow of quick-frozen lobster tails includes raw material receiving, pretreatment, sorting, quick-freezing, and packaging. Among these, grading is an important link to ensure product quality and meet market demand.

[0003] Currently, most lobster tails are screened using a nine-roller screener. The principle is to use nine sets of identical rollers. By setting the distance between each set of rollers and the screening plate from large to small, each set of rollers corresponds to a specific size range. Lobster tails of different sizes will fall at different positions, thus achieving the step-by-step sorting of lobsters.

[0004] During the process of the lobster tail moving laterally with the roller, if the size of the lobster tail on the roller is similar to the distance between the roller and the screening plate, the lobster tail will get stuck between the roller and the screening plate. At the same time, the spiral blades on the roller will forcefully squeeze the stuck lobster tail. The shell of the lobster tail subjected to this forceful squeezing will crack, affecting its appearance quality, and will also cause the meat inside the lobster tail to deform. Summary of the Invention

[0005] In order to overcome the shortcomings described in the background art, the present invention provides a grading and screening device for quick-frozen lobster tail processing.

[0006] The technical solution is as follows: A grading and screening device for processing quick-frozen lobster tails, comprising:

[0007] frame;

[0008] A screening base plate is mounted on the frame;

[0009] A fixed frame is provided on the screening base plate;

[0010] Rotating rollers are spaced apart and rotatably connected to the fixed frame. The distance between all the rotating rollers and the screening bottom plate gradually decreases from top to bottom. Each rotating roller is equipped with several elastic elements, which are spiral in shape.

[0011] A drive module is installed on the fixed frame to drive all the rotating rollers to rotate. A feeding module is provided on one side of the frame. A discharge pipe is fixed to the side of the screening bottom plate away from the feeding module. The discharge pipe is used to collect the screened material.

[0012] Furthermore, the elastic element is an elastic airbag, the elastic element is fixedly connected to and connected to a connecting pipe, the connecting pipe is connected to a rotating transition element, and the rotating transition element is rotatably connected to the adjacent rotating roller.

[0013] Furthermore, in the top-to-bottom arrangement of all the rotating rollers, some of the rotating rollers have two elastic elements, and the remaining rotating rollers have one elastic element.

[0014] Furthermore, the rotating roller has two elastic elements, on which the two elastic elements are in contact.

[0015] Furthermore, the pitch of all the aforementioned elastic elements decreases progressively from top to bottom.

[0016] Furthermore, it also includes:

[0017] An angle adjustment mechanism, mounted on the frame, is used to adjust the angle of the screening bottom plate and control the speed of material movement on the screening bottom plate. The angle adjustment mechanism includes:

[0018] The first drive push rod is fixedly connected to the frame, and a straight rack is fixedly connected to the telescopic end of the first drive push rod.

[0019] A spur gear is fixedly connected to the screening base plate, a spur rack meshes with the spur gear, and the frame is rotatably connected to the screening base plate.

[0020] Furthermore, the frame is provided with circumferentially evenly distributed arc-shaped grooves, and the screening base plate is provided with circumferentially evenly distributed protrusions. The arc-shaped grooves and the protrusions of the screening base plate correspond one-to-one, and the protrusions on the screening base plate slide adjacent to the arc-shaped grooves.

[0021] Furthermore, the interior of the arc-shaped groove and the exterior of the protruding pillars on the screening base plate are both made into rough surfaces.

[0022] Furthermore, it also includes:

[0023] A gap adjustment component, disposed on the screening base plate, is used to push the fixed frame to move, thereby adjusting the distance between all the rotating rollers and the screening base plate. The gap adjustment component includes:

[0024] A fixed frame is fixed to the side of the screening base plate near the machine frame, and a second drive push rod is fixed to the fixed frame;

[0025] The support frame is fixedly connected to the fixed frame and to the telescopic end of the second drive push rod. The support frame is slidably connected to the fixed frame.

[0026] Furthermore, a water distribution pipe is installed on the upper side of the fixed frame, and the water distribution pipe is used to spray liquid onto the screening base plate.

[0027] Compared with existing similar technologies, the present invention has at least the following advantages: By replacing the existing rigid spiral blades with flexible elastic elements, when the elastic elements come into contact with the stuck lobster tail, the elastic elements deform. During this process, the elastic elements do not cause hard compression on the lobster tail, thus reducing the probability of damage to the lobster tail shell and also preventing damage to the meat inside the lobster tail, thus ensuring the integrity of the lobster tail.

[0028] This invention uses an elastic element as an elastic airbag and extracts the gas from the elastic element at the point where the lobster tails accumulate, thereby reducing the obstruction of the lobster tails on the rotating roller. This facilitates the downward movement of the accumulated lobster tails, allowing them to disperse quickly and further reducing the squeezing pressure on the lobster tails, thus improving the lobster tail screening effect.

[0029] This invention limits the pitch of the elastic elements, so that the pitch of all elastic elements decreases layer by layer, reducing the accumulation of lobster tails during the initial screening, improving the stability of subsequent lobster tail movement, reducing damage to the lobster tails, and ensuring the integrity of the lobster tails.

[0030] This invention rotates the screening bottom plate when lobster tails accumulate, increases the inclination of the rotating roller, enhances the guiding effect of the rotating roller on the lobster tails, and facilitates the movement of the lobster tails on the rotating roller. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention;

[0033] Figure 3 This is a three-dimensional structural diagram of the fixed frame and rotating roller of the present invention;

[0034] Figure 4 This is a three-dimensional structural diagram of the elastic element and driving module of the present invention;

[0035] Figure 5 This is an exploded three-dimensional view of the rotating roller and elastic element of the present invention;

[0036] Figure 6 This is a three-dimensional structural diagram of the connecting pipe and the rotating transition component of the present invention;

[0037] Figure 7 This is a three-dimensional structural diagram of the spur rack and spur gear of the present invention;

[0038] Figure 8This is a three-dimensional structural diagram of the fixing frame and the second drive push rod of the present invention;

[0039] Figure 9 This is an exploded three-dimensional view of the components at the second drive push rod of the present invention.

[0040] Explanation of reference numerals in the attached drawings: 1-Frame, 2-Screening base plate, 3-Fixed frame, 4-Rotating roller, 5-Elastic element, 6-Drive module, 7-Feeding module, 8-Discharge pipe, 21-Connecting pipe, 22-Rotating transition element, 31-First drive push rod, 32-Straight rack, 33-Straight gear, 34-Arc groove, 41-Fixed frame, 42-Second drive push rod, 43-Support frame, 51-Water distribution pipe. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0042] Research has revealed that when using a nine-roller screening machine to screen lobster tails, the tails may accumulate on the upper side of the rollers. This is mainly due to factors such as the feeding rate exceeding the rollers' sorting capacity, insufficient roller spacing, unreasonable gradation, or significant differences in lobster tail shape. Once the lobster tails accumulate on the rollers, they cannot move smoothly, and the spiral blades on the rollers will squeeze them, leading to damage.

[0043] As the lobster tails are screened, the number of lobster tails on the rollers gradually decreases from top to bottom, and from left to right. Therefore, lobster tails are more likely to accumulate in the upper and left-hand parts.

[0044] Example 1: A grading and screening device for processing quick-frozen lobster tails. Please refer to the following: Figures 1-6 The system includes: a frame 1; a screening base plate 2, mounted on the frame 1; a fixed frame 3, mounted on the screening base plate 2; rotating rollers 4, spaced apart and rotatably connected to the fixed frame 3, with the distance between all rotating rollers 4 and the screening base plate 2 gradually decreasing from top to bottom; rotating rollers 4 are equipped with several elastic elements 5, which are spiral in shape; a drive module 6, mounted on the fixed frame 3, used to drive all rotating rollers 4 to rotate; a feeding module 7 is provided on one side of the frame 1; and a discharge pipe 8 is fixedly connected to the side of the screening base plate 2 away from the feeding module 7, which is used to collect the screened material.

[0045] This solution aims to address the problem of existing nine-roller screening machines causing lobster tails to break due to the squeezing effect of the spiral blades on the rollers. This improves the screening efficiency. The rotating rollers 4 consist of nine rollers, all tilted to facilitate rightward movement of the lobster tails. The distances between each rotating roller 4 and the screening base plate 2 represent the dimensions of the lobster tails being screened. The elastic element 5 functions similarly to the spiral blades on the existing rollers. The drive module 6 is an existing structure, including a high-efficiency motor and several pulleys and belts. The high-efficiency motor offers lower losses and higher efficiency, saving energy. The feeding module 7 is a chain conveyor used to transport the lobster tails to the rear of the screening base plate 2 (in contact with the uppermost rotating roller 4). The discharge pipe 8 is an existing structure with nine receiving ports, each corresponding to one of the rotating rollers 4.

[0046] Please refer to the following: Figures 4-6 The elastic element 5 is an elastic airbag, and is fixedly connected to and connected to a connecting pipe 21. The connecting pipe 21 is connected to a rotating transition element 22, which is rotatably connected to the adjacent rotating roller 4. During the rotation of the rotating roller 4, the connecting pipe 21 will not become entangled under the action of the rotating transition element 22. The rotating transition element 22 is connected to an external air supply system. Each elastic element 5 is in an independent state, realizing the control of a single elastic element 5 without affecting the operation of the other elastic elements 5. An infrared sensor is installed on the fixed frame 3 to monitor the number of lobster tails on all rotating rollers 4 in real time. All rotating rollers 4 are arranged in a top-to-bottom order. In the sequence, the first three rotating rollers 4 have two elastic elements 5. The two elastic elements 5 on the same rotating roller 4 are in contact to ensure the continuity of the lobster tail guidance between the two elastic elements 5. The remaining rotating rollers 4 have one elastic element 5. The pitch of all elastic elements 5 decreases from top to bottom. When initially screening the lobster tails, there are more lobster tails on the upper rotating roller 4. At this time, the pitch of the elastic element 5 is larger, which reduces the probability of lobster tails accumulating and clogging. The number of lobster tails on the lower rotating roller 4 gradually decreases. At this time, the pitch of the elastic element 5 is smaller, which makes the conveying of lobster tails more stable, reduces damage to lobster tails, and ensures the integrity of lobster tails.

[0047] Working principle: When using this device to screen lobster tails, the operator first turns on the drive module 6, the feeding module 7 and the external air supply system. The external air supply system works and pumps air into the connecting pipe 21 through all the rotating transition parts 22. The gas in the connecting pipe 21 enters the adjacent elastic part 5, and the elastic part 5 expands until it is fully expanded. Then the external air supply system is turned off.

[0048] After the drive module 6 is started, it drives all the rotating rollers 4 to start rotating. The rotating rollers 4 drive the elastic elements 5 on them to rotate synchronously. At this time, the operator puts the lobster tail into the feeding module 7. The feeding module 7 conveys the lobster tail, moving it to the upper side of the screening bottom plate 2 and onto the first rotating roller 4 (from top to bottom). The first rotating roller 4 drives the lobster tail on it to move to the right through the elastic elements 5. During this process, when the size of the lobster tail is smaller than the distance between the first rotating roller 4 and the screening bottom plate 2, the lobster tail falls onto the second rotating roller 4. If the size of the lobster tail at this time is smaller than the distance between the first rotating roller 4 and the screening bottom plate 2, the lobster tail falls onto the second rotating roller 4. If the distance between the second rotating roller 4 and the screening base plate 2 is still less than the distance between the second rotating roller 4 and the screening base plate 2, the lobster tail continues to move downwards until it reaches a size greater than the distance between a certain rotating roller 4 and the screening base plate 2 (e.g., the fifth rotating roller 4). The fifth rotating roller 4 then moves the lobster tail to the right, and the lobster tail moves to the receiving port corresponding to the feeding pipe 8. The lobster tails are continuously fed onto the feeding module 7, and the above process is repeated until all the lobster tails have been screened. Then, the feeding module 7 and the drive module 6 are turned off. During the above process, the operator collects the lobster tails that fall from the feeding pipe 8.

[0049] As the elastic element 5 moves the lobster tail to the right, because the elastic element 5 is made of soft material, when the elastic element 5 comes into contact with the stuck lobster tail, the lobster tail squeezes the elastic element 5, causing the elastic element 5 to deform. During this process, the elastic element 5 does not cause hard compression to the lobster tail, thus reducing the probability of damage to the lobster tail shell and also preventing damage to the meat inside the lobster tail, thus ensuring the integrity of the lobster tail.

[0050] As the lobster tails move downwards, the number of lobster tails on all rotating rollers 4 gradually decreases from top to bottom. Simultaneously, guided by the elastic element 5 and the rotating rollers 4, the number of lobster tails on the same rotating roller 4 gradually decreases from left to right. Therefore, the left side of the upper rotating roller 4 is more prone to accumulating lobster tails. When the infrared sensor on the fixed frame 3 detects lobster tails accumulating on a certain rotating roller 4 (taking the left side of the first rotating roller 4 as an example), when the infrared sensor on the fixed frame 3 detects lobster tails accumulating on the left side of the first rotating roller 4... During accumulation, the external air supply system draws gas from the left elastic element 5 on the rotating roller 4. The elastic element 5 gradually contracts from an expanded state, causing it to lose its guiding function for the lobster tail. Due to the contraction of the elastic element 5, there is no obstruction between the rotating roller 4 and the screening bottom plate 2, reducing the obstruction of the lobster tail on the rotating roller 4. This facilitates the downward movement of the small-sized lobster tails accumulated on it. At the same time, due to the contraction of the elastic element 5, the compression on the lobster tail is further reduced, allowing the large-sized lobster tail at that position to move to the right along the rotating roller 4 by its own gravity.

[0051] As the lobster tails move to the right, the accumulated lobster tails gradually disperse. The larger lobster tails continue to move to the right and onto the elastic element 5 on the right side. At this time, the elastic element 5 on the right side continues to guide the lobster tails, speeding up the movement of the lobster tails and ensuring the efficiency of screening.

[0052] When the infrared sensor on the fixed frame 3 detects that the number of lobster tails on the rotating roller 4 has returned to normal, the external air supply system injects air into the elastic element 5 on the left side to restore its expanded state. If accumulation occurs in other parts, the above process is repeated.

[0053] Example 2: Based on Example 1, please refer to... Figure 2 , Figure 7 and Figure 8 It also includes: an angle adjustment mechanism, which is set on the frame 1 and is used to adjust the angle of the screening bottom plate 2 and control the speed of material movement on the screening bottom plate 2. The angle adjustment mechanism includes: a first drive push rod 31, which is fixed to the frame 1. A straight rack 32 is fixed to the telescopic end of the first drive push rod 31; a spur gear 33, which is fixed to the screening bottom plate 2. The straight rack 32 and the spur gear 33 mesh. The frame 1 and the screening bottom plate 2 are rotatably connected.

[0054] In the above scheme, the first drive push rod 31 is an existing electric push rod with a self-locking function. By driving the screening bottom plate 2 to rotate, it changes the tilt angle of all rotating rollers 4, making it easier for the lobster tail to move on the rotating rollers 4.

[0055] Please refer to the following: Figure 7 The frame 1 is provided with four circumferentially evenly distributed arc-shaped grooves 34, and the centers of all the circles containing the arc-shaped grooves 34 are located at the same position. The screening base plate 2 is provided with four circumferentially evenly distributed protrusions, and the arc-shaped grooves 34 correspond one-to-one with the protrusions of the screening base plate 2. The protrusions on the screening base plate 2 slide on adjacent arc-shaped grooves 34. The arc-shaped grooves 34 guide the screening base plate 2, making the rotation of the screening base plate 2 more stable. The inside of the arc-shaped grooves 34 and the outside of the protrusions on the screening base plate 2 are both made into rough surfaces. The rough surfaces of the arc-shaped grooves 34 and the protrusions on the screening base plate 2 are used to increase the friction between the two, further preventing the arc-shaped grooves 34 and the screening base plate 2 from sliding relative to each other. At the same time, the force on the extension end of the first drive push rod 31 is reduced, and the service life of the first drive push rod 31 is extended.

[0056] Workflow: When the infrared sensor on the fixed frame 3 detects the accumulation of lobster tails on the rotating roller 4, the first drive push rod 31 is activated. The telescopic end of the first drive push rod 31 drives the rack 32 to move upward, and the rack 32 drives the spur gear 33 to rotate clockwise (to... Figure 7(Based on the front view perspective), the spur gear 33 drives the screening base plate 2 to rotate, and the protrusion on the screening base plate 2 rotates along the adjacent arc groove 34 until the protrusion of the screening base plate 2 moves to the limit position of the adjacent arc groove 34, at which point the first drive push rod 31 stops working, and the screening base plate 2 stops rotating.

[0057] During the rotation of the screening base plate 2, the screening base plate 2 drives all the parts on it to rotate synchronously, that is, all the rotating rollers 4 rotate clockwise, increasing the inclination of the rotating rollers 4, reducing the resistance of the rotating rollers 4 to the lobster tails, facilitating the movement of the lobster tails at the accumulation point, and at the same time, the elastic element 5 at the accumulation point of the lobster tails is in a contracted state (according to the working principle of Example 1), thus further increasing the movement speed of the lobster tails at the accumulation point, thereby accelerating the dispersion speed of the lobster tails and ensuring the efficiency of screening the lobster tails.

[0058] After the lobster tails are dispersed at the accumulation point, the telescopic end of the first drive push rod 31 extends, and the telescopic end of the first drive push rod 31 drives the rack 32 to reset. The rack 32 drives the screening bottom plate 2 to reset through the spur gear 33, so that the protrusions on the screening bottom plate 2 slide and reset along the adjacent arc grooves 34, and all the rotating rollers 4 reset, thereby restoring the device to the initial state of screening lobster tails.

[0059] Example 3: Based on Example 2, please refer to... Figures 2-4 , Figure 8 and Figure 9 It also includes: a gap adjustment component, which is set on the screening base plate 2 and is used to push the fixed frame 3 to move, thereby adjusting the distance between all rotating rollers 4 and the screening base plate 2. The gap adjustment component includes: a fixed frame 41, which is fixed to the side of the screening base plate 2 near the frame 1, and the fixed frame 41 is fixedly connected to the second drive push rod 42; a support frame 43, which is fixed to the fixed frame 3 and is fixedly connected to the telescopic end of the second drive push rod 42, and the support frame 43 is slidably connected to the fixed frame 41.

[0060] In the above scheme, the fixed frame 41 is provided with two vertical slots, and the support frame 43 slides within the two vertical slots. The second drive push rod 42 is an electric push rod. Before using this device to screen lobster tails, the operator first adjusts the distance between all rotating rollers 4 and the screening base plate 2 according to the size range of the lobster tails to be screened. Taking the large size of the lobster tails as an example, which requires increasing the distance between all rotating rollers 4 and the screening base plate 2, the operator opens the second drive push rod 42. The telescopic end of the second drive push rod 42 drives the support frame 43 to move upward, the support frame 43 drives the fixed frame 3 to move upward, and the fixed frame 3 drives all the rotating rollers 4 on it to move upward synchronously, thereby increasing the distance between all rotating rollers 4 and the screening base plate 2. After the distance between the two is adjusted to a suitable value, the operator closes the second drive push rod 42, and the telescopic end of the second drive push rod 42 stops extending, that is, all rotating rollers 4 stop moving. This increases the applicability of this device. At the same time, by adjusting all rotating rollers 4 synchronously, the operator ensures that the moving distance of all rotating rollers 4 is consistent, thus ensuring the accuracy of the adjustment.

[0061] After the lobster tails are sieved, the operator controls the second drive push rod 42 to move all the rotating rollers 4 downwards to return to their initial positions.

[0062] Please refer to the following: Figures 1-4 A water distribution pipe 51 is installed on the upper side of the fixed frame 3, and several water outlets are provided on the lower side of the water distribution pipe 51. The water distribution pipe 51 is used to spray water onto the screening base plate 2. The water distribution pipe 51 is connected to the external water supply system. When using this device to screen lobster tails, the operator turns on the external water supply system, and the external water supply system injects water into the water distribution pipe 51. The water distribution pipe 51 sprays water onto the screening base plate 2 and gradually flows downward. The flowing water increases the lubrication of the screening base plate 2, making it easier for the lobster tails to move on the screening base plate 2. During the downward flow of the water, it will come into contact with the lobster tails being screened. At this time, the water impacts the lobster tails, increasing their own lubrication and making it easier for them to move downward, reducing the probability of lobster tails accumulating on the screening base plate 2. After the lobster tails are screened, the operator turns off the external water supply system.

[0063] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A grading and screening device for processing quick-frozen lobster tails, characterized in that, Including: Rack (1); Screening base plate (2) is set on the frame (1); A fixed frame (3) is set on the screening base plate (2); Rotating rollers (4) are spaced apart and rotatably connected to the fixed frame (3). The distance between all the rotating rollers (4) and the screening bottom plate (2) gradually decreases from top to bottom. The rotating rollers (4) are equipped with several elastic elements (5), which are spiral in shape. The drive module (6) is installed on the fixed frame (3) and is used to drive all the rotating rollers (4) to rotate. A feeding module (7) is provided on one side of the frame (1). A discharge pipe (8) is fixed on the side of the screening bottom plate (2) away from the feeding module (7). The discharge pipe (8) is used to collect the screened material. The elastic element (5) is an elastic airbag. The elastic element (5) is fixedly connected to and connected to a connecting pipe (21). The connecting pipe (21) is connected to a rotating transition element (22). The rotating transition element (22) is rotatably connected to the adjacent rotating roller (4). In the top-to-bottom arrangement of all the rotating rollers (4), some of the rotating rollers (4) have two elastic elements (5), and the remaining rotating rollers (4) have one elastic element (5). The rotating roller (4) has two elastic elements (5) on which the two elastic elements (5) are in contact; The pitch of all the elastic elements (5) decreases progressively from top to bottom; The gas inside the elastic element (5) where the lobster tail accumulates is extracted, thereby reducing the obstruction of the lobster tail on the rotating roller (4).

2. The grading and screening device for quick-frozen lobster tail processing according to claim 1, characterized in that, It also includes: An angle adjustment mechanism, mounted on the frame (1), is used to adjust the angle of the screening base plate (2) and control the speed of material movement on the screening base plate (2). The angle adjustment mechanism includes: The first drive push rod (31) is fixedly connected to the frame (1), and the telescopic end of the first drive push rod (31) is fixedly connected to a straight rack (32). A spur gear (33) is fixed to the screening base plate (2), a spur rack (32) meshes with the spur gear (33), and the frame (1) is rotatably connected to the screening base plate (2).

3. The grading and screening device for quick-frozen lobster tail processing according to claim 2, characterized in that, The frame (1) is provided with circumferentially evenly distributed arc grooves (34), and the screening base plate (2) is provided with circumferentially evenly distributed protrusions. The arc grooves (34) correspond one-to-one with the protrusions of the screening base plate (2), and the protrusions on the screening base plate (2) slide adjacent to the arc grooves (34).

4. The grading and screening device for quick-frozen lobster tail processing according to claim 3, characterized in that, The interior of the arc-shaped groove (34) and the outer side of the protruding column on the screening base plate (2) are both made into rough surfaces.

5. A grading and screening device for processing quick-frozen lobster tails according to claim 4, characterized in that, It also includes: A gap adjustment component, disposed on the screening base plate (2), is used to push the fixed frame (3) to move, thereby adjusting the distance between all the rotating rollers (4) and the screening base plate (2). The gap adjustment component includes: A fixed frame (41) is fixed to the side of the screening base plate (2) near the frame (1), and a second drive push rod (42) is fixed to the fixed frame (41). The support frame (43) is fixed to the fixed frame (3) and fixed to the telescopic end of the second drive push rod (42). The support frame (43) is slidably connected to the fixed frame (41).

6. A grading and screening device for processing quick-frozen lobster tails according to claim 5, characterized in that, A water distribution pipe (51) is installed on the upper side of the fixed frame (3), and the water distribution pipe (51) is used to spray liquid onto the screening base plate (2).

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