A multi-stage screening device for fish farming

Abstract

The present invention discloses a multi-stage screening device for fish farming, comprising a screening body and an outer shell, wherein 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 shell and can form an up and down reciprocating stroke cycle relative to the outer shell, 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 shell 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 and the lower end thereof is provided with a post-screen packaging structure. The present invention adopts a plurality of screening bodies with screening structures inclined in sequence, and after screening, the screened fish enter the post-screen guide structure through the relative movement of the screen body and the outer shell, and then enter the post-screen packaging structure, completing multi-stage screening at one time, screening out fish of multiple specifications, and improving work efficiency and screening quality.

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 fish farming. Background Art

[0002] At present, in the process of fish farming, such as catching adult fish and fry, fish screening is required to separate fish of different sizes, so as to facilitate subsequent precision farming according to different body sizes of fish or fry. However, general screens can only achieve one screening, and it is difficult to achieve multi-stage screening in one screening action. If multi-stage 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 work efficiency; or it is difficult to clean in time, causing the screened fish or fry to 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 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 downward-slanting post-screen guide structure on the outer shell, and then enter the corresponding post-screen packaging structure, completing multi-stage screening at one time and screening out fish of multiple specifications. The operation is convenient and the work efficiency is improved. Moreover, 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 farming, including a screening body, an outer shell, a supporting structure, a post-screen guide structure and a post-screen packaging structure, a plurality of screening structures inclined in sequence are provided in the screening body, 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 shell from top to bottom and can form an up and down reciprocating stroke cycle relative to the outer shell body, 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 shell 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 obliquely downward and the lower end is provided with a post-screen packaging structure for holding screened fish.

[0005] Furthermore, an elastic guide structure is provided between the upper end of the screening body and the upper part of the outer shell, 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 guide structure includes a connecting sleeve block, a horizontal plate, a guide 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 shell. A horizontal plate is provided on the lower end of the side wall of the outer shell corresponding to the notch. The upper end of the guide straight rod is embedded in the connecting sleeve block and extends vertically downward through the horizontal plate. The part of the guide 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 fixed on the corresponding horizontal plate and the connecting cap.

[0007] Furthermore, an elastic telescopic sleeve is nested on 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 shell 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, and the post-screen guide structure 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 enter the discharge channel from the screening body and are 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 and the supporting leg is vertically penetrated inside. The locking leg sleeve block is horizontally embedded with a locking bolt, 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 provided below the box cover.

[0014] The present invention has the following beneficial effects due to the adoption of the above technology:

[0015] 1. The present invention adopts a plurality of screening bodies with screening structures inclined in sequence, 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 inclined downward on the outer shell, and then enter the corresponding post-screen packaging structure, completing multi-stage screening at one time and screening out fish of multiple specifications. The operation is convenient and the work efficiency is improved. Moreover, 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.

[0016] 2. In order to adapt to the aquaculture pond with muddy bottom, the present invention is provided with support legs, which are inserted into the bottom of the aquaculture pond with muddy bottom through the support legs. 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 fish after screening.

[0017] 3. In order to adapt to shore or cement aquaculture ponds, 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 provided 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 fish screening and packaging, the present invention cancels the spring in the elastic guide structure, replaces one of the four guide straight rods with a screw, and a servo motor is provided on the horizontal plate. The servo motor is connected to the screw and can drive the screw to rotate. The part of the screw that passes through the horizontal plate is rotatably connected to the horizontal plate. The upper part of the screw passes through the corresponding connecting sleeve and is threadedly connected, so that the screw can drive the connecting sleeve to move up and down. Through the forward and reverse rotation of the screw, an up and down reciprocating stroke cycle including a downward discharge stroke and an upward reset stroke is formed, thereby realizing the electric 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, the present invention provides multiple groups of supporting protrusions on the inner wall of the screening body from top to bottom, with each group of supporting protrusions consisting 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. Then, 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 screening body.

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

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

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

[0029] In the figure: 100, screening body, 101, connecting sleeve, 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 shell, 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, 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] Example 1: Figures 1-8As shown, the present invention provides a multi-stage screening device for fish farming, including a screening body 100, an outer shell 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 inclined guide frame 106 made of rubber. A plurality of screening structures 103 are arranged from top to bottom in a broken line distribution and with mesh sizes decreasing in sequence. The screening structure 103 adopts a porous plate structure or a frame structure with 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 shell 300 from top to bottom and can form an up and down reciprocating stroke cycle relative to the outer shell 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 shell 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.

[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 shell 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 101, a horizontal plate 303, a guide 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. The upper end side wall of the outer shell 300 is provided with a notch for the connecting sleeve 101 to move up and down. A horizontal plate 303 is provided at the lower end of the corresponding notch on the side wall of the outer shell 300. The upper end of the guide rod 201 is embedded in the connecting sleeve 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 a compression spring 202 and the lower end is nested with a 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 shell 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 screening body 100 moving up and down relative to the outer shell 300 and the fit between the subsequent support structure and the outer shell 300, a vertically extending guide reinforcement rib 105 is provided on the outer wall of the screening body 100, and the inner wall of the outer shell 300 is concave outward to form a guide slide 304 corresponding to the guide reinforcement rib 105. 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, a right-angled edge groove 301 is formed between the outer edge of the outer shell 300 and the outward protrusion of the guide slide 304, which facilitates the support leg 500 to fit against the outer shell 300, thereby improving 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. 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 shell 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 top discharge channel 602 and the outer shell 300, and horizontal ribs 604 are provided between the bottoms of adjacent discharge channels 602. The vertical ribs 601 and the horizontal ribs 604 help to improve 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 shell 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 shell 300 is equal.

[0036] Among them, the supporting structure includes supporting legs 500, locking leg sleeve blocks 501 and locking bolts 502. The locking leg sleeve blocks 501 are fixedly arranged at the four corners of the lower end of the outer shell 300 and the supporting legs 500 are vertically penetrated inside. The locking leg sleeve blocks 501 are horizontally embedded with locking bolts 502. The locking bolts 502 extend into the ends of the locking leg sleeve blocks 501 and rest on the supporting legs 500. Accordingly, since it can be inserted into the bottom of the muddy breeding pond through the supporting legs 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 does not separate from the original water environment, which can effectively reduce the stress response of the fish after screening.

[0037] When in use, the entire 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 down 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. Fixed; 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. Under the elastic force of the compression spring 202, the screening body 100 starts the upward reset stroke until it is reset, and this operation can be repeated.

[0038] Example 2: Figure 9 As shown, based on the first embodiment, in order to adapt to shore or cement aquaculture ponds, the support structure and post-screening 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 diversion structure 600, and the box structure 800 is correspondingly provided below the box cover 801. In this case, the box structure 800 serves as both the post-screening packaging structure and the support structure. In this case, the box cover 801 and the box structure 800 should also be provided 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 previous embodiment.

[0039] Example 3: On the basis of Example 1 or Example 2, the spring in the elastic guide structure is cancelled, and one of the four guide straight rods 201 is replaced with a lead screw. A servo motor is provided on the horizontal plate 303, and 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, and the upper part of the lead screw passes through the corresponding connecting sleeve 101 and is threadedly connected, so that the lead screw can drive the connecting sleeve 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, multiple groups of supporting protrusions are provided on the inner wall of the screening body 100 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 400. The screening structure 103 is pressed against the corresponding supporting protrusions and the load of the screening structure 103 is monitored by the pressure sensor. Then, automatic post-screening packaging can be achieved through closed-loop control with a preset pressure threshold.

Claims

1. A multi-stage screening device for fish farming, characterized by: The invention comprises a screening body (100), an outer shell (300), a supporting structure, a post-screen guide structure (600) and a post-screen packaging structure, wherein a plurality of screening structures (103) distributed in a broken line are provided in the screening body (100), 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), and the screening body (100) is embedded in the outer shell (300) from top to bottom and can form an up and down reciprocating stroke cycle relative to the outer shell (300), and the stroke cycle includes a downward movement and a downward movement. The discharge stroke and the upward reset stroke are arranged on the side wall of the outer shell (300) corresponding to the end point of the downward discharge stroke of the discharge port (104) or the starting point of the upward reset stroke. The post-screen guide structure (600) is inclined downward and extends, and the lower end thereof is provided with the post-screen packaging structure for holding the screened fish; an elastic guide structure is provided between the upper end of the screening body (100) and the upper part of the outer shell (300), so that the screening body (100) can be retracted after reaching 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 of the upward reset stroke; the outer wall of the screening body (100) is provided with a vertically extending guide reinforcement rib (105), the inner wall of the outer shell (300) is concave outward to form a guide slideway (304) corresponding to the guide reinforcement rib (105), and the left and right sides of the outer shell (300) are respectively provided with the post-screen guide structure (600), and the post-screen guide structure (600) includes a discharge channel (602 ) and a discharge interface (603), the discharge channel (602) is located below the discharge interface (603), and 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).

2. The multi-stage screening device for fish farming according to claim 1, 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 shell (300); the horizontal plate (303) is provided at the lower end of the corresponding notch on the side wall of the outer shell (300); 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).

3. The multi-stage screening device for fish farming according to claim 2, characterized in that: An elastic telescopic sleeve (200) is nested on 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).

4. The multi-stage screening device for fish farming according to claim 3, characterized in that: The upper end of the guide slide (304) is provided with a limit pin (305) for preventing the guide reinforcement rib (105) from upwardly separating from the guide slide (304).

5. The multi-stage screening device for fish farming according to claim 4, 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 the four corners of the lower end of the outer shell (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) extends into the locking leg sleeve block (501) and abuts against the support leg (500).

6. The multi-stage screening device for fish farming according to claim 5, characterized in that: A net bag structure (700) is correspondingly provided at the lower end of the discharge interface (603).

7. The multi-stage screening device for fish farming according to claim 4, characterized in that: The supporting structure comprises a box cover (801) and a box body structure (800), wherein the box cover (801) is correspondingly nested in the discharge interface (603) of the post-screen guide structure (600), and the box body structure (800) is correspondingly provided below the box cover (801).

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