A non-destructive screening device for fish fry breeding and grading

Abstract

This invention relates to the field of fish fry screening technology, and more particularly to a non-destructive screening device for fish fry breeding and grading, comprising a fixed frame; an electric guide rail mounted on the fixed frame; a receiving box fixedly connected to the moving part of the electric guide rail; multiple screening components stacked on the receiving box; a water feeder mounted on the top of the fixed frame; and a water outlet pipe provided on the receiving box. Water is supplied to the multiple stacked screening components through the water feeder, and water is drained through the water outlet pipe, forming a top-down water flow in the multiple stacked screening components, which performs multi-stage screening of the fish fry while they are in water. This invention breaks through the limitations of traditional equipment, allowing for both submerged operation in fish ponds and on-shore screening, adapting to different aquaculture operation scenarios.

Description

Technical Field

[0001] This invention relates to the field of fish fry screening technology, and in particular to a non-destructive screening device for fish fry breeding and grading. Background Technology

[0002] In the prior art, Chinese patent CN115812655A discloses a screening structure for largemouth bass fry. This patent uses a single central column as the core support, and multiple frames nested on the column are stacked to form a multi-stage screening channel. After the fry are poured in from the top, they can pass through the screening baskets with different apertures in sequence to complete the grading process, which effectively improves the convenience of onshore screening operations.

[0003] However, there are some problems: the entire screening process is carried out in a water-free state, exposing the fish fry to the air, which makes them highly susceptible to dehydration and a decrease in survival rate. Secondly, due to its specific structural design, this patent can only be used on land and cannot be directly submerged in aquaculture ponds. Summary of the Invention

[0004] To overcome the shortcomings of existing multi-stage fish fry screening equipment that cannot be used simultaneously in water and on land, this invention provides: a non-destructive screening device for fish fry breeding and grading, comprising a fixed frame; an electric guide rail mounted on the fixed frame; a receiving box fixedly connected to the moving part of the electric guide rail; multiple screening components stacked on the receiving box; a water feeder installed on the top of the fixed frame; and a water outlet pipe provided on the receiving box; water is supplied to the multiple stacked screening components through the water feeder, and water is drained through the water outlet pipe, forming a top-down water flow in the multiple stacked screening components, thereby performing multi-stage screening of fish fry with water in the process.

[0005] As a further preferred embodiment, the screening assembly includes a screening box; a screen plate is provided on the lower side of the screening box; an electric push rod is fixedly connected to the outside of the screening box; a sealing plate is fixedly connected to the telescopic part of the electric push rod, and the sealing plate is pushed to the left by the telescopic part of the electric push rod to seal the bottom of the screening box.

[0006] As a further preferred embodiment, the screen plate can slide up and down on the lower side inside the screening box; an inclined surface is provided on the lower side of the screen plate frame, and a push block is fixed to the left side of the sealing plate, with another inclined surface adapted to the inclined surface on the upper side of the push block; when the sealing plate drives the push block to move to the left or right, the screen plate moves up or down.

[0007] As a further preferred option, the bottom of the screening box is equipped with retaining rings, and the screening boxes are stacked by retaining rings.

[0008] As a further preferred option, in multiple stacked screening components, the sieve apertures of the sieve plate decrease in size from top to bottom.

[0009] As a further preferred option, when the fixing frame is installed in the fish pond, a water pump is installed on the outlet pipe; the receiving box is moved up and down by an electric guide rail, so that the upper side of the screening box at the top is exposed above the water surface.

[0010] As a further preferred option, when the mounting bracket is installed on the shore, a water control valve capable of controlling the water flow rate is installed on the outlet pipe.

[0011] As a further preferred option, an airbag is embedded in the left side of the lower side of the sealing plate; by controlling the sealing plate to move to the left, the airbag faces the screening box below, and by controlling the expansion and contraction of the airbag, the water in the screening box below is patted and squeezed.

[0012] As a further preferred option, the receiving box is equipped with a filter screen to block the water outlet pipe.

[0013] As a further preferred option, the filter is configured with two layers.

[0014] The beneficial effects are as follows: This invention breaks through the limitations of traditional equipment use, allowing for both submerged operation in fish ponds and on-shore screening, adapting to different aquaculture scenarios. The water delivery device and adaptable outlet pipe structure, combined with a water pump for pond operations and a water control valve for on-shore operations, create a stable top-to-bottom water flow within the multi-layered screening box. This ensures the entire fry screening process is conducted in an aquatic environment, completely preventing dehydration of the fry. Simultaneously, the flowing water increases oxygen levels, preventing fry from accumulating and dying due to oxygen deprivation, significantly improving the survival rate of the screened fry. Furthermore, the invention uses an electric push rod to drive the sealing plate reciprocating, allowing the screen plate to slide up and down. This actively disperses clumps of fry on the screen, preventing large fry from clogging the screen holes and ensuring continuous and accurate screening. Additionally, the air bladder embedded in the sealing plate expands and contracts synchronously, patting and squeezing the water, further preventing fry clumping and accelerating the screening speed. After screening, the present invention can seal the water at the bottom of the screening box with a sealing plate, so that the fish fry are continuously immersed in water during the transfer process, thus continuing the advantage of operating in water. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the combined structure of multiple screening components and receiving box of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the screening component of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the sieve plate and the sealing plate of the present invention;

[0019] Figure 5This is a schematic diagram of the receiving box of the present invention.

[0020] In the attached diagram, the following are the reference numerals: 1-fixed frame, 2-electric guide rail, 3-receiving box, 4-screening assembly, 5-water feeder, 3a-outlet pipe, 3b-filter screen, 41-screening box, 42-screen plate, 43-electric push rod, 44-sealing plate, 45-airbag, 41a-ring, 42a-inclined surface, 44a-push block. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the prior art, Chinese patent CN115812655A discloses a screening structure for largemouth bass fry. This patent uses a single central column as the core support, and multiple frames nested on the column are stacked to form a multi-stage screening channel. After the fry are poured in from the top, they can pass through the screening baskets with different apertures in sequence to complete the grading process, which effectively improves the convenience of onshore screening operations.

[0023] However, there are some problems: the entire screening process is carried out in a water-free state, exposing the fish fry to the air, which makes them highly susceptible to dehydration and a decrease in survival rate. Secondly, due to its specific structural design, this patent can only be used on land and cannot be directly submerged in aquaculture ponds.

[0024] Example 1: As Figures 1-5 As shown, the present invention provides: a non-destructive screening device for fish fry breeding and grading, comprising a fixed frame 1, an electric guide rail 2, a receiving box 3, screening components 4, and a water feeder 5; the fixed frame 1 is equipped with the electric guide rail 2; the receiving box 3 is fixedly connected to the moving part of the electric guide rail 2; multiple screening components 4 are stacked on the receiving box 3; the water feeder 5 is installed on the top of the fixed frame 1, and a water outlet pipe 3a is provided on the receiving box 3; water is supplied to the multiple stacked screening components 4 through the water feeder 5, and water is drained through the water outlet pipe 3a, forming a top-to-bottom water flow in the multiple stacked screening components 4, and the fish fry are subjected to multi-stage screening with water through the multiple stacked screening components 4.

[0025] The screening assembly 4 includes a screening box 41, a screen plate 42, an electric push rod 43, and a sealing plate 44; the screen plate 42 is provided on the lower side of the screening box 41; the electric push rod 43 is fixedly connected to the outer side of the screening box 41; the sealing plate 44 is fixedly connected to the telescopic part of the electric push rod 43, and the sealing plate 44 is pushed to the left by the telescopic part of the electric push rod 43 to seal the bottom of the screening box 41.

[0026] The sieve plate 42 can slide up and down on the lower side inside the screening box 41; an inclined surface 42a is provided on the lower side of the frame of the sieve plate 42, and a push block 44a is fixedly connected to the left side of the sealing plate 44. Another inclined surface adapted to the inclined surface 42a is provided on the upper side of the push block 44a; when the sealing plate 44 drives the push block 44a to move to the left or right, the sieve plate 42 moves up or down. By controlling the up and down movement of the sieve plate 42, this invention can prevent fish fry from crowding on the sieve plate 42 and prevent large fish fry from blocking the sieve holes for a long time, thus affecting the screening effect.

[0027] A retaining ring 41a is provided at the bottom of the screening box 41. The screening boxes 41 are stacked by the retaining ring 41a to prevent movement.

[0028] In the multiple stacked screening components 4, the sieve holes of the sieve plate 42 decrease from top to bottom.

[0029] When the fixing frame 1 is installed in the fish pond, a water pump is installed on the outlet pipe 3a; the receiving box 3 is moved up and down by the electric guide rail 2, so that the upper side of the screening box 41 located at the top is exposed above the water surface.

[0030] When the fixed frame 1 is installed on the shore, a water control valve that can control the water flow rate is installed on the water outlet pipe 3a, and the water flow speed in the screening box 41 is controlled by the water control valve.

[0031] An airbag 45 is embedded in the left side of the lower side of the sealing plate 44; by controlling the sealing plate 44 to move to the left, the airbag 45 faces the screening box 41 below. By controlling the expansion and contraction of the airbag 45, the water in the screening box 41 below is patted and squeezed to prevent the fish fry from crowding together and to accelerate the screening of the fish fry.

[0032] The receiving box 3 is equipped with a filter screen 3b to block the water outlet pipe 3a, so as to prevent the fish fry from escaping from the water outlet pipe 3a.

[0033] The filter 3b is configured as a double layer.

[0034] When using this invention, according to the growth cycle of the fish fry, select the sieve plate 42 with the corresponding sieve hole size, and select the corresponding number of sieve boxes 41 as needed for the number of grading and sieving. In the attached figure of this invention, there are 3 sieve boxes 41. Stack the sieve boxes 41 together from top to bottom, and place the bottom sieve box 41 on the receiving box 3. Among the stacked sieve plates 42, the sieve holes of the sieve plates 42 decrease from top to bottom.

[0035] When this invention is used in a fish pond, the fixing frame 1 is installed in the fish pond, and a water pump is installed on the water outlet pipe 3a; after the screening boxes 41 are stacked, the receiving box 3 is moved up and down by the moving part of the electric guide rail 2, so that the upper side of the screening box 41 at the top is exposed above the water surface; then the water supply device 5 is controlled to send water to the screening box 41 at the top, and the water pump is controlled to pump water through the water outlet pipe 3a, so that a water flow from top to bottom is formed in the multiple stacked screening boxes 41. Afterwards, the workers scoop up the fish fry in the fish pond and pour them into the screening box 41 at the top. The fish fry are screened by multiple screen plates 42 under the action of the water flow from top to bottom.

[0036] When the present invention is used on land, the fixing frame 1 is installed on the land and a water control valve that can control the water flow is installed on the water outlet pipe 3a. The water supply device 5 is controlled to send water to the uppermost screening box 41. The water flows from top to bottom into the receiving box 3. When the water overflows from the uppermost screening box 41, the water control valve can be opened to let the water flow out, thereby forming a water flow from top to bottom in multiple stacked screening boxes 41. Then, the workers scoop up the fish fry from the fish pond and pour them into the uppermost screening box 41. The fish fry are screened by multiple screen plates 42 under the action of the water flow from top to bottom.

[0037] Thus, when screening fish fry, whether the invention is installed in a fish pond or on the shore, it can create a top-down water flow in the stacked screening boxes 41. The water flow allows the fish fry to pass through the screening plate 42 for screening, and the fish fry are kept in constant contact with water during screening, which prevents the fish fry from losing their survival rate due to dehydration. At the same time, the flowing water can also increase the oxygen content, preventing the fish fry from dying from lack of oxygen due to piling up together during screening.

[0038] Furthermore, after screening is completed, the electric push rod 43 is controlled to push the sealing plate 44 to the left, sealing the bottom of the screening box 41. This traps water in each screening box 41. Then, the electric guide rail 2 can be controlled to move the receiving box 3 upward, thereby moving the stacked screening boxes 41 upward, so that multiple screening boxes 41 are orderly above the water surface. At the same time, workers can orderly lift and remove the screening boxes 41 that are above the water surface. Of course, when the present invention is used on land, it is not necessary to control the electric guide rail 2 to move the receiving box 3 upward. Thus, during the transfer process after the fish fry are screened, the present invention can still keep the fish fry in contact with water by trapping water in each screening box 41, thus avoiding dehydration.

[0039] Furthermore, when fish fry are screened on the sieve plate 42, they tend to clump together. When this happens, larger fry can clog the sieve holes for an extended period, affecting the screening effect. To address this, this invention allows for the control of the telescopic part of the electric push rod 43 to push the sealing plate 44 back and forth (during which the sealing plate 44 does not completely seal the bottom of the screening box 41). This, in turn, causes the sealing plate 44 to drive the push block 44a to move back and forth. Since the sieve plate 42 can slide up and down on the lower side of the screening box 41, and the frame of the sieve plate 42 is equipped with... The push block 44a has an inclined surface 42a and another inclined surface on its upper side that is adapted to the inclined surface 42a. Therefore, when the push block 44a moves back and forth left and right, the inclined surface drives the screen plate 42 to move back and forth up and down through the transmission and the vertical sliding restriction of the screen plate 42. When the fish fry are clustered on the upper side of the screen plate 42, the vertical movement of the screen plate 42 can drive the fish fry on the screen plate 42 to move upward as a whole. When the screen plate 42 moves downward, the fish fry will disperse again, thus avoiding large fish fry from blocking the screen holes for a long time and affecting the screening effect.

[0040] Furthermore, to further prevent fish fry from crowding together and to increase the screening speed of fish fry, while the sealing plate 44 moves back and forth left and right and the screen plate 42 moves back and forth up and down, the airbag 45 embedded in the lower left side of the sealing plate 44 can always be positioned above the screening box 41. The airbag 45 is continuously expanded and contracted by the air pump to beat and squeeze the water in the screening box 41 below, thereby preventing fish fry from crowding together and accelerating the screening of fish fry.

[0041] It should be noted that the smallest fish fry obtained by screening in this invention are collected through the receiving box 3, and a filter screen 3b is provided in the receiving box 3 to block the water outlet pipe 3a to prevent the fish fry from escaping from the water outlet pipe 3a. After the fish fry are screened, the fish fry in the receiving box 3 are scooped out by workers using a net.

[0042] In summary, this invention breaks through the limitations of traditional equipment usage, allowing for both submerged operation in fish ponds and on-shore screening, adapting to various aquaculture scenarios. The water delivery device 5 and the customizable outlet pipe 3a, combined with a water pump for pond operations and a water control valve for on-shore operations, create a stable top-to-bottom water flow within the multi-layered screening box 41. This ensures the entire fish fry screening process is conducted in an aquatic environment, completely preventing dehydration of the fry. The flowing water also increases oxygen levels, preventing fry from accumulating and dying due to oxygen deprivation, significantly improving the survival rate of the screened fry. Furthermore, the invention uses an electric push rod 43 to drive the sealing plate 44 to reciprocate, allowing the screen plate 42 to slide up and down. This actively disperses clumps of fry on the screen plate 42, preventing large fry from clogging the screen holes and ensuring continuous and accurate screening. Simultaneously, the airbags 45 embedded in the sealing plate 44 expand and contract synchronously, patting and squeezing the water, further mitigating fry clumping and accelerating the screening speed. After screening, the present invention can seal the bottom of the screening box 41 with the sealing plate 44 to retain water, so that the fish fry are continuously immersed in water during the transfer process, thus continuing the advantage of operating with water.

[0043] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A non-destructive screening device for grading fish fry, characterized in that, It includes a fixed frame (1); an electric guide rail (2) is installed on the fixed frame (1); a receiving box (3) is fixedly connected to the moving part of the electric guide rail (2); multiple screening components (4) are stacked on the receiving box (3); a water supply device (5) is installed on the top of the fixed frame (1), and a water outlet pipe (3a) is provided on the receiving box (3); water is supplied to the multiple stacked screening components (4) through the water supply device (5), and water is drained through the water outlet pipe (3a), forming a water flow from top to bottom in the multiple stacked screening components (4), and the fish fry are subjected to multi-stage screening with water through the multiple stacked screening components (4).

2. The fish fry breeding grading and non-destructive screening equipment according to claim 1, characterized in that, The screening assembly (4) includes a screening box (41); a screen plate (42) is provided on the lower side of the screening box (41); an electric push rod (43) is fixedly connected to the outside of the screening box (41); a sealing plate (44) is fixedly connected to the telescopic part of the electric push rod (43), and the sealing plate (44) is pushed to the left by the telescopic part of the electric push rod (43) to seal the bottom of the screening box (41).

3. The fish fry breeding grading and non-destructive screening equipment according to claim 2, characterized in that, The sieve plate (42) can slide up and down on the lower side inside the screening box (41); an inclined surface (42a) is provided on the lower side of the frame of the sieve plate (42), and a push block (44a) is fixed on the left side of the sealing plate (44). Another inclined surface that matches the inclined surface (42a) is provided on the upper side of the push block (44a); when the sealing plate (44) drives the push block (44a) to move to the left or right, the sieve plate (42) moves up or down.

4. The fish fry breeding grading and non-destructive screening equipment according to claim 2, characterized in that, The bottom of the screening box (41) is provided with a retaining ring (41a), and the screening boxes (41) are stacked by the retaining ring (41a).

5. The fish fry breeding grading and non-destructive screening equipment according to claim 2, characterized in that, In multiple stacked screening components (4), the sieve holes of the sieve plate (42) decrease from top to bottom.

6. The fish fry breeding grading and non-destructive screening equipment according to claim 3, characterized in that, When the fixed frame (1) is installed in the fish pond, a water pump is installed on the outlet pipe (3a); the receiving box (3) is moved up and down by the electric guide rail (2) so that the upper side of the screening box (41) located at the top is exposed above the water surface.

7. The fish fry breeding grading and non-destructive screening equipment according to claim 6, characterized in that, When the mounting bracket (1) is installed on the shore, a water control valve capable of controlling the water flow rate is installed on the outlet pipe (3a).

8. The fish fry breeding grading and non-destructive screening equipment according to claim 7, characterized in that, in An airbag (45) is embedded in the left side of the lower side of the sealing plate (44); by controlling the sealing plate (44) to move to the left, the airbag (45) faces the screening box (41) below. By controlling the expansion and contraction of the airbag (45), the water in the screening box (41) below is patted and squeezed.

9. The fish fry breeding grading and non-destructive screening equipment according to claim 1, characterized in that, The receiving box (3) is equipped with a filter screen (3b) for shielding the water outlet pipe (3a).

10. The fish fry breeding grading and non-destructive screening equipment according to claim 9, characterized in that, The filter (3b) is configured as a double layer.

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