Multi-stage screening device for fishery breeding

Abstract

The multistage screening device comprises a screening body and an outer sleeve body, a plurality of screening structures which are inclined in sequence are arranged in the screening body, and discharging openings are formed in the lower ends, corresponding to the screening structures, of the side wall of the screening body; the screening body is embedded in the outer sleeve body and can form a stroke cycle reciprocating up and down relative to the outer sleeve body, the stroke cycle comprises a downward-moving discharging stroke and an upward-moving resetting stroke, and an after-screening flow guide structure is arranged on the side wall of the outer sleeve body and corresponds to the end point of the downward-moving discharging stroke or the starting point of the upward-moving resetting stroke of the discharging port. The after-screening flow guide structure obliquely extends downwards, and an after-screening split charging structure is correspondingly arranged at the lower end of the after-screening flow guide structure. The screening bodies of the screening structures which are sequentially inclined are adopted, after screening, through relative movement of the screening bodies and the outer sleeve body, screened fishes enter the after-screening flow guide structure and then enter the after-screening split charging structure, multi-stage screening is completed at a time, the fishes of multiple specifications are screened out, and the working efficiency and the screening quality are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fish screening equipment, and in particular relates to a multi-stage screening device for fishery breeding. Background Art

[0002] At present, in the process of fish farming, such as adult fish fishing, fry fishing, etc., fish screening is required to separate fish of different sizes, so as to facilitate subsequent precision farming according to different sizes of fish or fry. However, general screens can only achieve one screening, and it is difficult to achieve multi-level screening in one screening action. If multi-level screening is performed by using multiple layers of screens with different mesh sizes stacked in sequence, the screened fish or fry either need to be frequently cleaned manually, which not only increases the workload but also reduces the work efficiency; or it is difficult to clean in time, so that the screened fish or fry stay on the screen for a long time, which not only affects the screening effect, but also easily causes the fish or fry to suffer greater stress casualties. Therefore, there is an urgent need for an efficient, reliable and easy-to-operate multi-stage screening device to solve the above problems. Summary of the invention

[0003] In order to overcome the technical problems described in the above-mentioned background technology, the present invention provides a multi-stage screening device for fishery farming, which adopts a plurality of screening bodies with a screening structure distributed in a broken line, and an outer shell is nested outside the screening body. After screening, the screening body and the outer shell move relative to each other, so that the screened fish enter the post-screen guide structure on the outer shell that is inclined downward, and then enter the corresponding post-screen packaging structure, so that multi-stage screening is completed at one time, and fish of multiple specifications are screened out. The operation is convenient and the work efficiency is improved. In addition, since the screened fish can be conveniently cleaned into the post-screen packaging structure, the stress response of the fish can be effectively reduced and the screening quality is improved.

[0004] The technical solution of the present invention is: a multi-stage screening device for fishery breeding, including a screening body, an outer casing, a supporting structure, a post-screen guide structure and a post-screen packaging structure, the screening body is provided with a plurality of screening structures inclined in sequence, a discharge port is provided on the side wall of the screening body corresponding to the lower end of the screening structure, the screening body is embedded in the outer casing from top to bottom and can form an up and down reciprocating stroke cycle relative to the outer casing, the stroke cycle includes a downward discharge stroke and an upward reset stroke, a post-screen guide structure is provided on the side wall of the outer casing corresponding to the end point of the downward discharge stroke or the starting point of the upward reset stroke of the discharge port, the post-screen guide structure extends downwardly in an inclined manner and a post-screen packaging structure for holding screened fish is provided at the lower end.

[0005] Furthermore, an elastic guide structure is provided between the upper end of the screening body and the upper part of the outer casing, so that after the screening body reaches the end point of the downward discharge stroke, the elastic guide structure can automatically start the upward reset stroke and drive the screening body to reset to the end point of the upward reset stroke.

[0006] Furthermore, the elastic guiding structure includes a connecting sleeve block, a horizontal plate, a guiding straight rod, a compression spring and a connecting cap. The connecting sleeve block is fixedly arranged at the upper end of the screening body. A notch for the connecting sleeve block to move up and down is provided on the upper end side wall of the outer casing. A horizontal plate is provided at the lower end of the side wall of the outer casing corresponding to the notch. The upper end of the guiding straight rod is embedded in the connecting sleeve block and extends vertically downward through the horizontal plate. The part of the guiding straight rod below the horizontal plate is nested with a compression spring and the lower end is nested with a connecting cap. The upper and lower ends of the compression spring are respectively fixedly arranged on the corresponding horizontal plate and the connecting cap.

[0007] Furthermore, an elastic telescopic sleeve is embedded in the portion of the guide straight rod between the connecting sleeve block and the horizontal plate, and the upper and lower ends of the elastic telescopic sleeve are respectively fixedly arranged on the corresponding connecting sleeve block and the horizontal plate.

[0008] Furthermore, vertically extending guide reinforcement ribs are provided on the outer side wall of the screening body, and the inner side wall of the outer casing is concave outward to form a guide slideway corresponding to the guide reinforcement ribs.

[0009] Furthermore, a limit pin is provided at the upper end of the guide slide for preventing the guide reinforcement rib from escaping upward from the guide slide.

[0010] Furthermore, the left and right sides of the outer shell are respectively provided with a post-screen guide structure, which includes a discharge channel and a discharge interface. The discharge interface is below the discharge channel. The discharge channel is connected to the corresponding discharge port when the screening body is at the end of the downward discharge stroke or the starting point of the upward reset stroke, so that the screened fish on the corresponding inclined screening structure enters the discharge channel from the screening body and is discharged into the corresponding post-screen packaging structure through the discharge interface.

[0011] Furthermore, the supporting structure includes a supporting leg, a locking leg sleeve block and a locking bolt. The locking leg sleeve block is fixedly arranged at the four corners of the lower end of the outer sleeve body and the supporting leg is vertically penetrated inside. The locking bolt is horizontally embedded in the locking leg sleeve block, and the end of the locking bolt extends into the locking leg sleeve block and rests on the supporting leg.

[0012] Furthermore, a net bag structure is correspondingly provided at the lower end of the discharge interface.

[0013] Furthermore, the supporting structure includes a box cover and a box body structure. The box cover is correspondingly nested in the discharge interface of the post-screen guide structure, and the box body structure is correspondingly arranged under the box cover.

[0014] The present invention adopts the above technology, and the beneficial effects produced are as follows:

[0015] 1. The present invention adopts a plurality of screening bodies with screening structures inclined in sequence, and an outer casing is nested outside the screening body. After screening, the screening body and the outer casing move relative to each other, so that the screened fish enter the post-screening guide structure inclined downward on the outer casing, and then enter the corresponding post-screening packaging structure, so that multi-stage screening is completed at one time, and fish of multiple specifications are screened out. The operation is convenient and the work efficiency is improved. Moreover, since the screened fish can be conveniently cleaned into the post-screening packaging structure, the stress response of the fish can be effectively reduced and the screening quality is improved.

[0016] 2. In order to adapt to the breeding pond with mud bottom, the present invention is provided with support legs, which are inserted into the bottom of the breeding pond with mud bottom. The post-screening packaging structure is a net bag structure arranged at the lower end of the discharge interface. The net bag is soaked in water and does not separate from the original water environment, which can effectively reduce the stress response of the fish after screening.

[0017] 3. In order to adapt to the shore or cement aquaculture pond, the present invention is provided with a supporting structure including a box cover and a box body structure. The box cover is correspondingly nested in the discharge interface of the post-screen guide structure, and a box body structure filled with water is correspondingly arranged under the box cover. At this time, the box body structure is both a post-screen packaging structure and a supporting structure.

[0018] 4. In order to more conveniently carry out the post-screening and packaging of fish, the spring in the elastic guide structure of the present invention is cancelled, and one of the four guide straight rods is replaced by a lead screw. A servo motor is provided on the horizontal plate, and the servo motor is connected to the lead screw and can drive the lead screw to rotate. The lead screw passes through the horizontal plate and is rotatably connected to the horizontal plate. The upper part of the lead screw passes through the corresponding connecting sleeve block and is threadedly connected, so that the lead screw can drive the connecting sleeve block to move up and down. Through the forward and reverse rotation of the lead screw, an up and down reciprocating stroke cycle including a downward discharge stroke and an upward reset stroke is formed to realize the electric post-screening and packaging action. The servo motor is electrically connected to the controller in the protective cover and is controlled by the operator through a remote control switch.

[0019] 5. In order to realize automatic post-screening packaging in the present invention, multiple groups of supporting protrusions are arranged on the inner wall of the screening body from top to bottom, and each group of supporting protrusions consists of four. The supporting protrusions are provided with pressure sensors electrically connected to the controller in the protective cover. The screening structure is pressed against the corresponding supporting protrusions and the load of the screening structure is monitored by the pressure sensor. Automatic post-screening packaging can be realized through a closed-loop control method with a preset pressure threshold. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0021] Figure 2 yes Figure 1 Top view of the structure shown.

[0022] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle.

[0023] Figure 4 yes Figure 1 The structure shown is a schematic diagram of the structure after removing the protective cover, support legs and net bag structure.

[0024] Figure 5 yes Figure 4 The structure shown is a schematic diagram of the structure when the screening body is assembled downwardly into the outer casing.

[0025] Figure 6 yes Figure 5 Schematic diagram of the structure of the middle sieve body.

[0026] Figure 7 yes Figure 6 Top view of the structure shown.

[0027] Figure 8 yes Figure 7 Cross-sectional view at BB in the middle.

[0028] Fig. 9 It is a structural diagram of embodiment 2 of the present invention.

[0029] In the figure: 100, screening body, 101, connecting sleeve block, 102, gripper, 103, screening structure, 104, discharge outlet, 105, guide reinforcement rib, 106, oblique guide frame, 200, elastic telescopic sleeve, 201, guide straight rod, 202, compression spring, 203, connecting cap, 300, outer sleeve, 301, edge groove, 302, nested side, 303, horizontal plate, 304, guide slide, 305, limit pin, 400, protective cover, 500, support leg, 501, locking leg sleeve block, 502, locking bolt, 600, post-screen guide structure, 601, vertical rib, 602, discharge channel, 603, discharge interface, 604, horizontal rib, 700, net bag structure, 800, box structure, 801, box cover. DETAILED DESCRIPTION

[0030] Embodiment 1: Figure 1-Figure 8As shown, the present invention provides a multi-stage screening device for fish farming, comprising a screening body 100, an outer casing 300, a supporting structure, a post-screen guide structure 600 and a post-screen packaging structure. The screening body 100 is made of stainless steel and has an upper opening provided with an oblique guide frame 106 made of rubber. A plurality of screening structures 103 are arranged from top to bottom in a folded line distribution and with mesh sizes decreasing in sequence. The screening structure 103 adopts a porous plate structure or a frame structure of a stretched screen. A discharge port is provided on the side wall of the screening body 100 corresponding to the lower end of the screening structure 103. 104. A gripper 102 for an operator to grasp is provided at the upper end of the screening body 100. The screening body 100 is embedded in the stainless steel outer casing 300 from top to bottom and can form an up and down reciprocating stroke cycle relative to the outer casing 300. The stroke cycle includes a downward discharge stroke and an upward reset stroke. A post-screen guide structure 600 is provided on the side wall of the outer casing 300 corresponding to the end point of the downward discharge stroke or the starting point of the upward reset stroke of the discharge port 104. The post-screen guide structure 600 extends obliquely downward and a post-screen packaging structure for holding screened fish is provided at the lower end thereof.

[0031] In order to improve the convenience of operation, an elastic guide structure is provided between the upper end of the screening body 100 and the upper part of the outer casing 300, so that after the screening body 100 reaches the end point of the downward discharge stroke, the elastic guide structure can automatically start the upward reset stroke and drive the screening body 100 to reset to the end point of the upward reset stroke. Among them, the elastic guiding structure includes a connecting sleeve block 101, a horizontal plate 303, a guide rod 201, a compression spring 202 and a connecting cap 203. The connecting sleeve block 101 is fixedly arranged at the upper end of the screening body 100. A notch for the connecting sleeve block 101 to move up and down is arranged on the upper end side wall of the outer casing 300. A horizontal plate 303 is arranged at the lower end of the corresponding notch on the side wall of the outer casing 300. The upper end of the guide rod 201 is embedded in the connecting sleeve block 101 and extends vertically downward through the horizontal plate 303. The part of the guide rod 201 below the horizontal plate 303 is nested with the compression spring 202 and the lower end is nested with the connecting cap 203. The upper and lower ends of the compression spring 202 are respectively fixed on the corresponding horizontal plate 303 and the connecting cap 203.

[0032] In order to improve the service life of the spring, an elastic telescopic sleeve 200 made of plastic is nested on the part of the guide straight rod 201 between the connecting sleeve block 101 and the horizontal plate 303. The upper and lower ends of the elastic telescopic sleeve 200 are respectively fixed on the corresponding connecting sleeve block 101 and the horizontal plate 303. The elastic telescopic sleeve 200 prevents water from entering the vicinity of the compression spring 202 through the gap between the guide straight rod 201 and the horizontal plate 303. At the same time, the part of the outer sleeve 300 below the horizontal plate 303 is also provided with a nesting side 302, so that the protective cover 400 is nested and snapped on the horizontal plate 303 and the nesting side 302, so that the compression spring 202 is in a sealed and waterproof state, thereby improving the service life of the spring.

[0033] In order to improve the stability of the up and down movement of the screening body 100 relative to the outer casing 300 and the fit between the subsequent supporting structure and the outer casing 300, vertically extending guide reinforcement ribs 105 are provided on the outer wall of the screening body 100, and the inner wall of the outer casing 300 is concave outward to form a guide slide 304 corresponding to the guide reinforcement rib 105, and the upper end of the guide slide 304 is provided with a limit pin 305 for preventing the guide reinforcement rib 105 from upwardly detaching from the guide slide 304; at the same time, an edge groove 301 of a right-angle structure is formed between the outer edge of the outer casing 300 and the outward protrusion of the guide slide 304, which facilitates the support leg 500 to be close to the outer casing 300 and improves the stability of the support leg 500.

[0034] In order to improve the convenience of post-screening packaging and reduce the size of the post-screening guide structure 600, the post-screening guide structure 600 is respectively provided on the left and right sides of the outer shell 300, and the post-screening guide structure 600 includes a discharge channel 602 and a discharge interface 603. The discharge interface 603 is located below the discharge channel 602. The discharge channel 602 is connected to the corresponding discharge port 104 when the screening body 100 is at the end of the downward discharge stroke or the starting point of the upward reset stroke, so that the screened fish on the corresponding inclined screening structure 103 enter the discharge channel 602 from the screening body 100 and are discharged into the corresponding post-screening packaging structure through the discharge interface 603.

[0035] In order to maintain a good balance of the entire device, the weight of the post-screen guide structure 600 on the left and right sides of the outer casing 300 is equal. At the same time, on the post-screen guide structure 600 on the same side, vertical ribs 601 are respectively provided between adjacent discharge channels 602 and between the uppermost discharge channel 602 and the outer casing 300, and horizontal ribs 604 are provided between the bottoms of adjacent discharge channels 602. The vertical ribs 601 and the horizontal ribs 604 contribute to improving the structural strength of the discharge channels 602. At the same time, the weight of the post-screen guide structure 600 on the left and right sides of the casing can be adjusted by increasing or decreasing the amount of the vertical ribs 601 and the horizontal ribs 604 to ensure that the weight of the post-screen guide structure 600 on the left and right sides of the outer casing 300 is equal.

[0036] Among them, the supporting structure includes a supporting leg 500, a locking leg sleeve block 501 and a locking bolt 502. The locking leg sleeve block 501 is fixedly arranged at the four corners of the lower end of the outer sleeve body 300 and the supporting leg 500 is vertically penetrated inside. The locking bolt 502 is horizontally embedded in the locking leg sleeve block 501. The end of the locking bolt 502 extends into the locking leg sleeve block 501 and rests on the supporting leg 500. Accordingly, since it can be inserted into the bottom of the muddy breeding pond through the supporting leg 500, the post-screening packaging structure is a net bag structure 700 arranged at the lower end of the discharge interface 603. The net bag is soaked in water and has not separated from the original water environment, which can effectively reduce the stress response of the fish after screening.

[0037] When in use, the whole device is erected in the breeding pond by supporting legs 500, and the fish caught by the drag net are scooped up in sequence through a bucket and poured into the upper opening of the screening body 100. After each pouring, the fish and water fall downward to the uppermost screening structure 103 under the action of their own weight, and the screening structure 103 on which the fish is intercepted is automatically determined according to the size of the fish. The mesh size of the last layer of the screening structure 103 can be set to a dense net that does not exclude any fish or a specific mesh size that excludes small-sized fish. The specific size is determined according to the needs. and before pouring fish and water into the bucket next time, press the gripper 102 at the upper end of the screening body 100 to start the downward discharge stroke until the lowest point. At this time, the discharge port 104, the corresponding discharge channel 602, the corresponding discharge interface 603 and the corresponding net bag structure 700 are connected in sequence to form a fish discharge channel 602, completing the fish discharge, and then the operator releases the downward pressure, and under the elastic force of the compression spring 202, the screening body 100 starts the upward reset stroke until it is reset, and the operation can be repeated.

[0038] Embodiment 2: Fig. 9 As shown, on the basis of the first embodiment, in order to adapt to the shore or cement aquaculture pond, the support structure and the post-screening sub-packaging structure are modified, that is, the support structure includes a box cover 801 and a box structure 800, the box cover 801 is correspondingly nested in the discharge interface 603 of the post-screening guide structure 600, and the box structure 800 is correspondingly arranged below the box cover 801. At this time, the box structure 800 is both a post-screening sub-packaging structure and a support structure. At this time, the box cover 801 and the box structure 800 should also be arranged at the bottom of the outer shell 300 to ensure that the fish finally screened can be collected, rather than being released into the pond as non-collected fish as in the embodiment.

[0039] Embodiment 3: On the basis of embodiment 1 or embodiment 2, the spring in the elastic guide structure is cancelled, one of the four guide straight rods 201 is replaced by a lead screw, and a servo motor is provided on the horizontal plate 303. The servo motor is connected to the lead screw and can drive the lead screw to rotate. The part of the lead screw that passes through the horizontal plate 303 is rotatably connected to the horizontal plate 303. The upper part of the lead screw passes through the corresponding connecting sleeve block 101 and is threadedly connected, so that the lead screw can drive the connecting sleeve block 101 to move up and down. Through the forward and reverse rotation of the lead screw, an up and down reciprocating stroke cycle including a downward discharge stroke and an upward reset stroke is formed, thereby realizing the electric screen post-packaging action. The servo motor is electrically connected to the controller in the protective cover 400 and is controlled by the operator through the remote control switch. Of course, further, a plurality of groups of supporting protrusions are provided on the inner wall of the screening body 100 from top to bottom, each group of supporting protrusions consists of four supporting protrusions, and pressure sensors electrically connected to the controller in the protective cover 400 are provided on the supporting protrusions. The screening structure 103 is pressed against the corresponding supporting protrusions respectively and the load of the screening structure 103 is monitored by the pressure sensor. Then, automatic post-screening packaging can be achieved through a closed-loop control method with a preset pressure threshold.

Claims

1. A multi-stage screening device for fishery farming, characterized in that: The invention comprises a screening body (100), an outer casing (300), a supporting structure, a post-screen guide structure (600) and a post-screen packaging structure. The screening body (100) is provided with a plurality of screening structures (103) distributed in a broken line. A discharge port (104) is provided on the side wall of the screening body (100) corresponding to the lower end of the screening structure (103). The screening body (100) is embedded in the outer casing (300) from top to bottom and can form an up-and-down reciprocating stroke cycle relative to the outer casing (300). The stroke cycle includes a downward discharge stroke and an upward reset stroke. The post-screen guide structure (600) is provided on the side wall of the outer casing (300) corresponding to the end point of the downward discharge stroke or the starting point of the upward reset stroke of the discharge port (104). The post-screen guide structure (600) extends obliquely downward and the lower end thereof is provided with the post-screen packaging structure for containing screened fish.

2. A multi-stage screening device for fishery farming according to claim 1, characterized in that: An elastic guide structure is provided between the upper end of the screening body (100) and the upper portion of the outer casing (300), so that after the screening body (100) reaches an end point in the downward discharge stroke, the elastic guide structure can automatically start an upward reset stroke and drive the screening body (100) to reset to the end point of the upward reset stroke.

3. A multi-stage screening device for fishery farming according to claim 2, characterized in that: The elastic guide structure comprises a connecting sleeve (101), a horizontal plate (303), a guide straight rod (201), a compression spring (202) and a connecting cap (203); the connecting sleeve (101) is fixedly arranged at the upper end of the screening body (100); a notch for the connecting sleeve (101) to move up and down is provided on the upper end side wall of the outer casing (300); the horizontal plate (303) is provided at the lower end of the side wall of the outer casing (300) corresponding to the notch; the upper end of the guide straight rod (201) is embedded in the connecting sleeve (101) and extends vertically downward through the horizontal plate (303); the compression spring (202) is embedded in the portion of the guide straight rod (201) below the horizontal plate (303) and the connecting cap (203) is embedded in the lower end; the upper and lower ends of the compression spring (202) are respectively fixedly arranged on the corresponding horizontal plate (303) and the connecting cap (203).

4. A multi-stage screening device for fishery farming according to claim 3, characterized in that: An elastic telescopic sleeve (200) is embedded in the portion of the guide straight rod (201) between the connecting sleeve block (101) and the horizontal plate (303), and the upper and lower ends of the elastic telescopic sleeve (200) are respectively fixedly arranged on the corresponding connecting sleeve block (101) and the horizontal plate (303).

5. A multi-stage screening device for fishery farming according to claim 4, characterized in that: The outer side wall of the screening body (100) is provided with a vertically extending guide reinforcement rib (105), and the inner side wall of the outer casing (300) is curved outwardly to form a guide slideway (304) corresponding to and accommodating the guide reinforcement rib (105).

6. A multi-stage screening device for fishery farming according to claim 5, characterized in that: A limit pin (305) is provided at the upper end of the guide slideway (304) for preventing the guide reinforcement rib (105) from detaching upward from the guide slideway (304).

7. A multi-stage screening device for fishery farming according to claim 6, characterized in that: The post-screen guide structure (600) is provided on the left and right sides of the outer shell (300), respectively. The post-screen guide structure (600) comprises a discharge channel (602) and a discharge interface (603). The discharge interface (603) is located below the discharge channel (602). When the screening body (100) is at the end of a downward discharge stroke or the starting point of an upward reset stroke, the discharge channel (602) is connected to the corresponding discharge port (104), so that the screened fish on the corresponding inclined screening structure (103) enter the discharge channel (602) from the screening body (100) and are discharged into the corresponding post-screen packaging structure through the discharge interface (603).

8. A multi-stage screening device for fishery farming according to claim 7, characterized in that: The support structure comprises a support leg (500), a locking leg sleeve block (501) and a locking bolt (502); the locking leg sleeve block (501) is fixedly arranged at four corners of the lower end of the outer casing (300) and vertically penetrates the support leg (500); the locking bolt (502) is transversely embedded in the locking leg sleeve block (501); the end of the locking bolt (502) extending into the locking leg sleeve block (501) abuts against the support leg (500).

9. A multi-stage screening device for fishery farming according to claim 8, characterized in that: A net bag structure (700) is correspondingly provided at the lower end of the discharge interface (603).

10. The multi-stage screening device for fishery farming according to claim 7, characterized in that: The support structure comprises a box cover (801) and a box body structure (800); the box cover (801) is correspondingly nested in the discharge interface (603) of the post-screen flow guide structure (600); and the box body structure (800) is correspondingly arranged below the box cover (801).

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