A shrimp screening device for breeding shrimps in rice fields

Abstract

The utility model relates to a kind of shrimplets screening devices for rice field breeding shrimps, belong to shrimplets screening technical field. Mainly including rack, motor, pulley, screening frame, reciprocating mechanism, sieve tray, first collecting box, second collecting box and discharge assembly. Rack bottom is equipped with universal wheel, screening frame is installed in rack top by pulley, reciprocating mechanism drives screening frame horizontal reciprocating sliding, sieve tray is obliquely arranged below screening frame, and shrimplets after grading screening respectively fall into first collecting box and second collecting box. Buffer pad and flexible silica gel paddle reduce shrimplets damage, and discharge assembly facilitates shrimplets to be quickly taken out. The device can effectively avoid shrimplets accumulation, improve screening efficiency, reduce shrimplets damage, convenient to operate, and is suitable for efficient screening of rice field breeding shrimplets.

Description

Technical Field

[0001] This utility model belongs to the field of shrimp larvae screening technology, specifically relating to a shrimp larvae screening device for rice paddy shrimp breeding. Background Technology

[0002] In shrimp larvae farming, it is often necessary to screen and classify the larvae, transferring larger larvae to rice paddies for further cultivation, while smaller larvae remain in rearing ponds to grow to a suitable size before being transferred. This process usually relies on shrimp larvae screening devices.

[0003] However, while existing shrimp larvae screening devices can basically meet daily needs, they still have some limitations: when shrimp larvae are screened through the screen, falling from a high position can easily cause limb injuries, or even breakage of shrimp claws; at the same time, shrimp larvae tend to accumulate on the surface of the screen, affecting their smooth fall and thus reducing screening efficiency; in addition, the screened shrimp larvae are not easy to remove and transfer from the collection box, increasing the complexity of operation. Utility Model Content

[0004] To overcome the problems of easily injured shrimp larvae, low screening efficiency, and inconvenient operation in existing shrimp larvae screening devices, this utility model provides a shrimp larvae screening device for rice-field shrimp breeding. The screening frame and sieve tray achieve graded screening, and the graded shrimp larvae fall into a first collection box and a second collection box respectively. A buffer pad and flexible silicone paddle reduce shrimp larvae damage, and the discharge component facilitates quick removal of shrimp larvae. This device effectively avoids shrimp larvae accumulation, improves screening efficiency, reduces shrimp larvae damage, and is easy to operate, making it suitable for efficient screening of shrimp larvae in rice-field breeding.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A shrimp larvae screening device for rice paddy shrimp breeding mainly includes a frame, a motor, pulleys, a screening frame, a reciprocating motion mechanism, a sieve tray, a second collection box, a first collection box, and a discharge assembly. The frame is equipped with casters with brakes at its bottom and handles are fixedly installed at its ends for convenient overall movement and positioning of the device. The motor is bolted to one side of the frame, and its output shaft is connected to a belt drive mechanism. The screening frame is slidably mounted on the top of the frame via pulleys, which are embedded in the slide rails at the top of the frame, allowing the screening frame to slide smoothly in the horizontal direction. The reciprocating motion mechanism is installed on the top of the frame and at the end of the screening frame; one end is hinged to the screening frame, and the other end is connected to the motor via a belt drive mechanism to drive the screening frame to reciprocate horizontally. The frame is a hollow frame structure, and the sieve tray is installed obliquely in the hollow structure of the frame via fastening bolts, located directly below the screening frame. Both the screening frame and the sieve tray have screening holes, with the diameter of the screening holes in the screening frame being larger than that in the sieve tray to achieve graded screening. The second collection box is installed in the hollow structure of the frame, directly below the sieve tray, and is used to collect smaller shrimp larvae; the first collection box is installed at the end of the frame, at the discharge end of the sieve tray, and is used to collect larger shrimp larvae. The bottom and inner walls of the screening frame, sieve tray, second collection box, and first collection box are lined with cushioning pads made of smooth, food-grade silicone or rubber to reduce damage to the shrimp larvae during the screening process. The screening frame, second collection box, and first collection box are all equipped with discharge components to facilitate the discharge of shrimp larvae. The reciprocating motion mechanism includes a rotating shaft, a crank, and a connecting rod. The rotating shaft is rotatably mounted on the top of the frame via a bearing housing. The crank is fixedly mounted on the end of the rotating shaft via a keyway. One end of the connecting rod is hinged to the crank, and the other end is hinged to the screening frame. The motor is connected to the rotating shaft via a belt drive mechanism. When the motor starts, the rotating shaft rotates, driving the crank to perform a circular motion, which in turn drives the screening frame to slide back and forth horizontally via the connecting rod. This reciprocating motion effectively prevents shrimp larvae from accumulating on the surface of the screening frame, improving screening efficiency. The discharge assembly includes a pull plate, a handle, a screw, a limiting block, and a nut. The side walls of the screening frame, the second collection box, and the first collection box have discharge ports with grooves. The pull plate is slidably fitted into the grooves to close or open the discharge ports. The handle is welded to the top of the pull plate for easy operation. The screw is threadedly fixed to the top of the screening frame, the second collection box, and the first collection box. The limiting block is fitted onto the screw and can rotate freely; its bottom surface presses against the top ends of the pull plate to prevent it from loosening. The nut is threadedly fixed to the screw and locks the limiting block in place, ensuring the stability of the pull plate in the closed state. The bottoms of the screening frame, the second collection box, and the first collection box are designed with an inclined structure, with an inclination angle of 5° to 10°. This facilitates the natural sliding of shrimp larvae towards the discharge port, making it easier for them to be discharged. Furthermore, flexible silicone paddles are added to the inner wall of the screening frame. These paddles are fixed to the inner wall of the screening frame by adhesive, and their vibration with the screening frame helps to disperse the shrimp larvae, further preventing them from piling up. The beneficial effects of this utility model are: This utility model 1. The cushioning pad effectively reduces the impact when shrimp larvae fall from the screening frame or tray, preventing injury to their limbs. Made of food-grade silicone or rubber, the cushioning pad offers excellent flexibility and durability, while its smooth surface minimizes friction damage to the shrimp larvae. 2. The reciprocating motion mechanism drives the screening frame to slide back and forth in the horizontal direction. Combined with the dispersing effect of the flexible silicone paddle, it effectively avoids the accumulation of shrimp larvae on the surface of the screening frame and significantly improves the screening efficiency. 3. The design of the feeding component allows the screened shrimp larvae to be quickly and easily removed from the collection box for transfer, simplifying the operation process and improving work efficiency. Attached Figure Description

[0006] Figure 1 This is an isometric schematic diagram of the present invention.

[0007] Figure 2 This is a rear view schematic diagram of the present invention.

[0008] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0009] Figure 4 This is a schematic diagram of the right-side structure of this utility model.

[0010] Figure 5 This is a top view of the structure of this utility model.

[0011] Figure 6 yes Figure 5 A magnified view of a section at point B.

[0012] In the attached diagram, the following are the reference numerals: 1. Frame; 2. Motor; 3. Pulley; 4. Screening frame; 5. Reciprocating motion mechanism; 6. Screening tray; 7. Second collection box; 8. First collection box; 9. Discharge assembly; 10. Caster wheel; 11. Handle; 12. Belt drive mechanism; 401. Flexible silicone paddle; 501. Rotating shaft; 502. Crank; 503. Connecting rod; 901. Pull plate; 902. Handle; 903. Screw; 904. Limiting block; 905. Nut. Detailed Implementation

[0013] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0014] This utility model discloses a shrimp larvae screening device for rice paddy shrimp breeding, such as... Figure 1 As shown, the shrimp larvae screening device for rice paddy shrimp breeding mainly includes a frame 1, a motor 2, pulleys 3, a screening frame 4, a reciprocating motion mechanism 5, a sieve tray 6, a second collection box 7, a first collection box 8, and a discharge assembly 9. The frame 1 is the main supporting structure of the entire device, made of metal, and has a hollow bottom frame structure. Four casters 10 with brakes are installed at the bottom corners, and the casters 10 are bolted to the bottom of the frame 1 to facilitate overall movement and positioning of the device. A handle 11 is welded to one end of the frame 1. The handle 11 has a U-shaped structure, making it easy for operators to push or pull the device. The pulleys 3 are installed on the frame 1, and the screening frame 4 is installed on the top of the frame 1 via the pulleys 3. The bottom sides of the screening frame 4 are provided with sliding grooves that cooperate with the pulleys 3, allowing the screening frame 4 to slide reciprocally in the horizontal direction.

[0015] like Figure 3 As shown, motor 2 is bolted to frame 1, and the output shaft of motor 2 is connected to rotating shaft 501 via belt drive mechanism 12. Belt drive mechanism 12 includes a drive pulley, a driven pulley, and a drive belt. The drive pulley is fixed to the output shaft of motor 2 via a keyway, and the driven pulley is fixed to one end of rotating shaft 501 via a keyway. The drive belt is fitted onto the drive pulley and the driven pulley to transmit power from motor 2 to rotating shaft 501. Rotating shaft 501 is rotatably mounted on top of frame 1 via bearing seats, which are bolted to frame 1 to ensure smooth rotation of rotating shaft 501. Crank 502 is fixed to the other end of rotating shaft 501 via a keyway. One end of connecting rod 503 is hinged to crank 502 via a hinge shaft, and the other end is hinged to screening frame 4 via a hinge shaft. When motor 2 starts, the rotating shaft 501 rotates, driving crank 502 to make circular motion. Crank 502 drives screening frame 4 to slide back and forth in the horizontal direction through connecting rod 503, thereby realizing the dispersion and screening of shrimp seedlings in screening frame 4.

[0016] The screening frame 4 is a rectangular frame structure with cushioning pads attached to its bottom and inner walls. These cushioning pads are made of food-grade silicone or rubber, with a smooth surface and a certain degree of flexibility, to reduce the impact and friction damage to shrimp larvae during the screening process. The bottom of the screening frame 4 is tilted at an angle of 5° to 10°, and screening holes are provided at the bottom. The diameter of these screening holes is set according to actual needs, and is usually larger than the diameter of the screening holes on the sieve tray 6, to achieve the purpose of grading and screening. Figure 2 , Figure 4 As shown, a flexible silicone paddle 401 is added to the inner wall of the screening frame 4. The flexible silicone paddle 401 is fixed to the inner wall of the screening frame 4 by adhesive. It pushes the shrimp seedlings to disperse with the vibration of the screening frame 4, so as to avoid the shrimp seedlings from accumulating in the screening frame 4.

[0017] like Figure 1 , Figure 2 , Figure 4 As shown, the sieve disc 6 is installed at an angle in the hollow structure of the frame 1 by fastening bolts, located directly below the screening frame 4. The bottom of the sieve disc 6 is also inclined at an angle of 5° to 10°, and screening holes are opened at the bottom. The diameter of the screening holes is smaller than that of the screening holes on the screening frame 4, for further screening of shrimp larvae. The bottom and the inner walls of the sieve disc 6 are also covered with cushioning pads. The cushioning pads are made of food-grade silicone or rubber material, with a smooth surface and a certain degree of flexibility, to reduce the impact and friction damage to the shrimp larvae during the screening process.

[0018] The second collection box 7 is installed in the hollow structure of the frame 1, directly below the sieve plate 6, and is used to collect shrimp larvae after being screened by the sieve plate 6. The bottom of the second collection box 7 is inclined at an angle of 5° to 10°, and a discharge port is provided at the end. A sliding groove is provided at the discharge port, and a pull plate 901 is slidably embedded in the sliding groove to close or open the discharge port. Figure 6 As shown, the handle 902 is fixed to the top of the pull plate 901 by welding, making it easy for the operator to pull the pull plate 901. The screw 903 is fixedly installed on the top of the second collection box 7 by a threaded connection. The limiting block 904 is sleeved on the screw 903 and can rotate freely. Its bottom surface is used to press the top two ends of the pull plate 901 to prevent the pull plate 901 from loosening. The nut 905 is fixed to the screw 903 by a threaded connection and locks the limiting block 904 in place, ensuring the stability of the pull plate 901 in the closed state.

[0019] The first collection box 8 is installed at the end of the frame 1, located at the discharge end of the sieve plate 6, and is used to collect medium-sized shrimp larvae. For example... Figure 6 As shown, the bottom of the first collection box 8 is inclined at an angle of 5° to 10°, and a discharge port is provided at the end. A groove is provided at the discharge port, and a pull plate 901 is slidably embedded in the groove to close or open the discharge port. A handle 902 is fixed to the top of the pull plate 901 by welding, making it easy for the operator to pull the pull plate 901. A screw 903 is fixedly installed on the top of the first collection box 8 by a threaded connection. A limiting block 904 is sleeved on the screw 903 and can rotate freely. Its bottom surface is used to press the top two ends of the pull plate 901 to prevent the pull plate 901 from loosening. A nut 905 is fixed to the screw 903 by a threaded connection and locks the limiting block 904 in place to ensure the stability of the pull plate 901 in the closed state.

[0020] During operation, the operator first places the shrimp larvae to be screened into the screening frame 4, starts the motor 2, and the motor 2 drives the rotating shaft 501 to rotate via the belt drive mechanism 12. The rotating shaft 501 drives the crank 502 to rotate in a circular motion, and the crank 502 drives the screening frame 4 to slide back and forth horizontally via the connecting rod 503. Under the action of reciprocating sliding, the shrimp larvae in the screening frame 4 gradually disperse. Some of the smaller shrimp larvae fall into the screening tray 6 through the screening holes on the screening frame 4, and slide into the first collection box 8 through the inclined bottom of the screening frame 4. The screening holes on the screening tray 6 further screen out the smaller shrimp larvae, which finally fall into the second collection box 7. The larger shrimp larvae remain in the screening frame 4. The operator can open the discharge assembly 9 by pulling the handle 902 to remove the screened shrimp larvae from the second collection box 7 and the first collection box 8 for transfer. This achieves efficient screening of shrimp larvae, and the design of the buffer pad and flexible silicone paddle 401 effectively reduces damage to the shrimp larvae during the screening process, improving screening efficiency and ease of operation.

[0021] Work process: The operator first pushes the device to the work area using handle 11 and uses the brake function of the casters 10 to fix the device in position. Then, the shrimp larvae to be screened are poured into the screening frame 4, and the motor 2 is started. The power of the motor 2 is transmitted to the rotating shaft 501 via the belt drive mechanism 12. The rotating shaft 501 drives the crank 502 to rotate, and the crank 502 drives the screening frame 4 to slide back and forth horizontally via the connecting rod 503. During this process, the flexible silicone paddles 401 inside the screening frame 4 swing with the vibration of the screening frame 4, pushing the shrimp larvae to disperse and preventing them from accumulating inside the screening frame 4. Simultaneously, the bottom of the screening frame 4 is tilted at an angle of 5° to 10°, allowing the shrimp larvae to slide naturally downwards under gravity, further promoting the even distribution of the shrimp larvae.

[0022] As the screening frame 4 slides back and forth, some smaller shrimp larvae fall into the screening tray 6 through the screening holes at the bottom of the screening frame 4. The screening tray 6 also adopts an inclined design, and its screening hole diameter is smaller than that of the screening hole diameter of the screening frame 4. Therefore, it can perform secondary screening of smaller shrimp larvae and slide through the inclined bottom of the screening frame 4 into the first collection box 8 to complete the classification. The smaller shrimp larvae after being screened by the screening tray 6 finally fall into the second collection box 7, while the larger shrimp larvae remain in the screening frame 4.

[0023] The bottom and inner walls of both the screening frame 4 and the screening tray 6 are lined with cushioning pads made of food-grade silicone or rubber. These cushioning pads have a smooth surface and a certain degree of flexibility, effectively reducing damage to shrimp larvae caused by collisions or friction during the screening process. This significantly reduces the impact and friction forces on the shrimp larvae during screening, thus reducing the incidence of limb injuries. Furthermore, the oscillation of the flexible silicone paddle 401 not only helps to disperse the shrimp larvae but also further reduces the frequency of direct contact between them, thereby reducing the possibility of limb injuries.

[0024] After screening, the operator can open the discharge assembly 9 by pulling handle 902. The pull plate 901 slides up and down within the chute, opening the discharge port, and shrimp larvae are discharged from the screening frame 4, the second collection box 7, and the first collection box 8. The design of the screw 903 and the limiting block 904 ensures the stability of the pull plate 901 in the closed state, preventing leakage of shrimp larvae due to accidental loosening. Simultaneously, the inclined structure at the bottom of the collection box allows the shrimp larvae to slide naturally towards the discharge port, facilitating quick removal and transfer. The discharge assembly 9 simplifies the removal of shrimp larvae after screening, improving overall work efficiency.

[0025] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A shrimp larvae screening device for rice paddy shrimp breeding, characterized in that: The aforementioned shrimp seedling screening device for rice paddy shrimp breeding includes a frame (1), a motor (2), pulleys (3), a screening frame (4), a reciprocating motion mechanism (5), a sieve tray (6), a second collection box (7), a first collection box (8), and a discharge assembly (9). The frame (1) is equipped with universal wheels (10) with brake function at the bottom and a handle (11) is fixedly installed at the end. The motor (2) is fixedly installed on the frame (1) by bolts. The output shaft of the motor (2) is connected to the belt drive mechanism (12). The screening frame (4) is slidably installed on the top of the frame (1) through the pulleys (3). The reciprocating motion mechanism (5) is installed on the top of the frame (1) and located at the end of the screening frame (4). One end of the reciprocating motion mechanism (5) is hinged to the screening frame (4), and the other end is connected to the screen. The belt drive mechanism (12) is connected to the motor (2) for transmission. The screen plate (6) is installed at an angle in the hollow structure of the frame (1) by fastening bolts and is located directly below the screen frame (4). Screening holes are opened on both the screen frame (4) and the screen plate (6). The diameter of the screening hole of the screen frame (4) is larger than the diameter of the screening hole of the screen plate (6). The second collection box (7) is installed in the hollow structure of the frame (1) and is located directly below the screen plate (6). The first collection box (8) is installed at the end of the frame (1) and is located at the discharge end of the screen plate (6). Buffer pads are pasted on the bottom and the inner walls of the screen frame (4), screen plate (6), second collection box (7) and first collection box (8). Discharge components (9) are provided on the screen frame (4), second collection box (7) and first collection box (8).

2. The shrimp larvae screening device for rice paddy shrimp breeding as described in claim 1, characterized in that: The reciprocating motion mechanism (5) includes a rotating shaft (501), a crank (502), and a connecting rod (503). The rotating shaft (501) is rotatably mounted on the top of the frame (1) through a bearing seat. The crank (502) is fixedly mounted on the end of the rotating shaft (501) through a keyway. One end of the connecting rod (503) is hinged to the crank (502), and the other end is hinged to the screening frame (4). The motor (2) is connected to the rotating shaft (501) through a belt drive mechanism (12).

3. The shrimp larvae screening device for rice paddy shrimp breeding as described in claim 2, characterized in that: The discharge assembly (9) includes a pull plate (901), a handle (902), a screw (903), a limiting block (904), and a nut (905). The side walls of the screening frame (4), the second collection box (7), and the first collection box (8) are provided with discharge ports. A groove is provided at the discharge port. The pull plate (901) can be slidably embedded in the groove. The handle (902) is fixed to the top of the pull plate (901) by welding. The screw (903) is fixedly installed on the top of the screening frame (4), the second collection box (7), and the first collection box (8) by threaded connection. The limiting block (904) is sleeved on the screw (903) and can rotate freely. The nut (905) is fixed on the screw (903) by threaded connection and locks the limiting block (904) in place.

4. A shrimp larvae screening device for rice paddy shrimp breeding as described in any one of claims 1-3, characterized in that: The bottom of the filter box (4), the second collection box (7) and the first collection box (8) are set as inclined structures with an inclination angle ranging from 5° to 10°.

5. A shrimp larvae screening device for rice paddy shrimp breeding as described in claim 1 or 2, characterized in that: The inner wall of the filter box (4) is provided with a flexible silicone paddle (401), which is fixed to the inner wall of the filter box (4) by adhesive.

6. The shrimp larvae screening device for rice paddy shrimp breeding as described in claim 5, characterized in that: The cushioning pad is made of food-grade silicone or rubber material, and the surface of the cushioning pad is smooth.

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