Fry sampling device for breeding

Abstract

The invention provides a fry sampling device for breeding, and belongs to the technical field of fry sampling. Comprising a sampling pipe, one end of the sampling pipe is fixedly connected with an end cover and forms a containing cavity, the other end of the sampling pipe is provided with a sampling opening, one side, close to the end cover, of the sampling pipe is provided with a control hole, an observation part and a reference part are formed on the front side and the rear side of the containing cavity respectively, the observation part is made of a transparent material, and the reference part is made of a transparent material. And the reference part is made of a white material. The sampling pipe is held by a hand, the control hole is blocked by a thumb, then the sampling pipe is downwards inserted into a culture pond, then the control hole is loosened, water and fry can enter the sampling pipe from the sampling opening at the moment, then the control hole is blocked by the hand, the sampling pipe is lifted upwards, the culture water and the fry are brought out together, then the sampling pipe is rotated, and the sampling pipe is rotated. After the taken-out culture water and the fries enter the end cover in an inverted overturning manner, the specifications and vitality of the fries, the food condition in intestinal tracts, whether body surfaces have lesion conditions or not and the like can be directly checked, so that the health condition of the fries in the breeding period can be judged more intuitively and conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of fish fry sampling, and in particular to a fish fry sampling device for breeding. Background Art

[0002] Fish fry, also known as fish flowers, are newly hatched juveniles. The cultivation of fry, from the selection of broodstock to successful spawning and fertilization, hatching, and subsequent rearing, requires meticulous and responsible care. Careful attention must be paid to the fry's growth and environmental changes, and timely response measures must be implemented. Successful rearing requires frequent fry removal and inspection during this process. Existing inspection methods typically involve manual retrieval with tools such as bowls and basins, while bending over to scoop the fry bare-chested, or using nets for catching. These methods are inconvenient, lead to inaccurate observations, and can even damage the fry. Therefore, a more convenient, accurate, and minimally damaging fish sampling device for aquaculture is proposed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a fish fry sampling device for aquaculture to solve the problems of existing manual methods such as holding bowls and basins and catching fish fry with bare chest or bending over, or fishing with nets, which are inconvenient to operate, inaccurate observation, and even easy to damage the fish fry.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A fry sampling device for aquaculture comprises a sampling tube, one end of which is fixedly connected to an end cap and forms a accommodating cavity, the other end of which is provided with a sampling port, a control hole being provided on a side of the sampling tube close to the end cap, an observation portion and a reference portion being formed on the front and rear sides of the accommodating cavity, respectively, the observation portion being made of a transparent material, and the reference portion being made of a white material.

[0006] Preferably, a plurality of white observation rulers are fixedly connected between the observation portion and the reference portion, a gap is left between two adjacent white observation rulers, and scale lines are provided on the white observation rulers.

[0007] Preferably, the sampling tube is made of a transparent material, and first grooves are provided on both the front and rear sides of the sampling tube, and depth lines are provided on the inner wall of the first groove.

[0008] Preferably, an outer surface of the bottom end of the sampling tube is provided with an external thread and is threadedly connected to a fixing seat, and four supporting legs are fixedly connected to the edge of the lower surface of the fixing seat.

[0009] Preferably, a locking nut is threadedly connected to the outer surface of the bottom end of the sampling tube, and the locking nut is located on the upper surface of the fixing seat. The outer surface of the locking nut is provided with anti-slip grooves.

[0010] Preferably, a threaded step groove is provided on the lower surface of the end cover, and the top end of the sampling tube is threadedly connected to the inside of the step groove and is provided with a sealing gasket.

[0011] Preferably, a closing assembly is installed at the bottom end of the sampling tube and on the left side of the sampling port, the control hole is arranged on the right side of the sampling tube, and a control assembly is arranged on the left side of the top end of the sampling tube. The control assembly is used to enable the closing assembly to seal the sampling port after the control hole is opened.

[0012] Preferably, the sealing assembly includes a mounting plate fixedly connected to the left side of the bottom end of the sampling tube, the right side of the mounting plate is rotatably connected to a sealing plate via a pin shaft, a torsion spring is installed between the pin shaft and the mounting plate, the lower surface of the mounting plate is fixedly connected to a bracket, and the bottom end of the bracket is rotatably connected to a guide wheel.

[0013] Preferably, a mesh plate is fixedly connected to the middle of the sealing plate, and the mesh diameter of the mesh plate is smaller than the size of the fry.

[0014] The cam is fixedly mounted on the left side of the vehicle frame, and the cam is fixedly mounted on the vehicle frame. The cam is fixedly mounted on the vehicle frame, and the cam is fixedly mounted on the vehicle frame.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] In the above scheme, the white observation ruler and scale lines between the observation part and the reference part can be used to directly check the size and health of the fry, avoiding the staff from being shirtless, bending over, or directly contacting the water body, and the fry can be taken out for inspection, which is more convenient to use. In addition, the end cap is more firmly connected to the sampling tube to avoid water leakage, and the end cap can be removed from the sampling tube for better observation of the fry.

[0017] In the above scheme, the locking nut is tightened to prevent the fixing base from rotating at will. When adjusting the sampling depth, the locking nut is loosened, and then the fixing base is rotated to drive the support legs to rotate. Since the fixing base is threadedly connected to the external thread on the sampling tube, the fixing base can drive the support legs to move during the rotation process, thereby better determining the sampling height.

[0018] In the above scheme, the sealing plate can rotate around the pin shaft and compress the torsion spring, so that the sealing plate opens to expose the sampling port or closes the sampling port. Since the middle part of the sealing plate is fixedly connected to a mesh plate, and the mesh diameter of the mesh plate is smaller than the size of the fry, after water and fry enter the sampling tube from the sampling port, the sealing plate can be quickly closed to prevent the fry from escaping.

[0019] In the above scheme, when in use, the sealing plate is opened to expose the sampling port, and then the sampling tube is held by hand and the control hole is blocked with the thumb, and then the sampling tube is inserted downward into the breeding pond. Since the top of the sampling tube is sealed, the air will be stored at the top, and then the control hole is released. At this time, water and fry will enter the sampling tube from the sampling port, and the air will be discharged from the control hole. Then the handle is pulled, and the sealing plate is driven by the restoring force of the torsion spring to close the bottom sampling port of the sampling tube. Then the control hole is blocked with the hand, and the sampling tube is lifted upward to bring out the breeding water and fry together. Then the sampling tube is rotated, and the taken-out breeding water and fry enter the end cover. The specifications of the fry, the food status in the intestine, whether there are any symptoms on the body surface, etc. are directly checked, so that the overall health status of the fry can be directly observed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable one skilled in the relevant art to make and use the present disclosure.

[0021] Figure 1 This is a schematic diagram of the structure of a fish fry sampling device for aquaculture with a thinner sampling tube;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of a fish fry sampling device for aquaculture from the right side;

[0023] Figure 3 This is a schematic diagram of the left-side perspective structure of a fish fry sampling device for aquaculture;

[0024] Figure 4 This is a schematic diagram of the front cross-sectional structure of a fish fry sampling device for aquaculture;

[0025] Figure 5 Sampling device for fish fry used in aquaculture Figure 4 Schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 6 Sampling device for fish fry used in aquaculture Figure 4 Schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 7 This is a schematic diagram of the inverted structure of the end cover of the fish fry sampling device for aquaculture.

[0028] [reference numerals]

[0029] 1. Sampling tube; 2. End cap; 3. Receiving chamber; 4. Sampling port; 5. Control hole; 6. Observation section; 7. Reference section; 8. White observation ruler; 9. Scale mark; 10. First groove; 11. Depth line; 12. External thread; 13. Fixing base; 14. Support leg; 15. Locking nut; 201. Step groove; 202. Sealing gasket; 16. Closure assembly; 17. Control assembly; 1601. Mounting plate; 1602 , pin; 1603, sealing plate; 1604, torsion spring; 1605, bracket; 1606, guide wheel; 1607, mesh plate; 1701, fixed box; 1702, second groove; 1703, first slide bar; 1704, shift rod; 1705, pull rope; 1706, auxiliary wheel; 1707, upper slot; 1708, lower slot; 1709, second slide bar; 1710, handle; 1711, spring.

[0030] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0031] The following describes in detail a fish fry sampling device for aquaculture provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, for the sake of completeness, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known techniques. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0032] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0033] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0034] It will be understood that the meanings of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes being “on” something with intervening features or layers, and “on” or “over” means not only “on” or “above” something, but also includes being “on” or “above” something with no intervening features or layers.

[0035] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0036] like Figure 1-7 As shown, an embodiment of the present invention provides a fry sampling device for aquaculture, comprising a sampling tube 1, one end of which is fixedly connected to an end cap 2 and forms a receiving chamber 3, a sampling port 4 is provided at the other end of the sampling tube 1, a control hole 5 is provided on the side of the sampling tube 1 close to the end cap 2, and the control hole 5 can be manually blocked, an observation portion 6 and a reference portion 7 are respectively formed on the front and rear sides of the receiving chamber 3, the end cap 2 is a rectangular planar structure as a whole, which can directly observe various conditions of the fry, the observation portion 6 and the reference portion 7 are fixed together by a half-rectangular combination, the observation portion 6 is made of a transparent material, and the reference portion 7 is made of a white material;

[0037] When in use, hold the sampling tube 1 with your hand and block the control hole 5 with your thumb. The diameter of the sampling tube 1 is small. Then insert the sampling tube 1 downward into the breeding pond to reach the appropriate sampling depth. Since the top of the sampling tube 1 is sealed, the air will be stored at the top. Then loosen the control hole 5. At this time, water and fry will enter the sampling tube 1 from the sampling port 4, and the air will be quickly discharged from the control hole 5 to prevent the fry from running away. Then block the control hole 5 and quickly take out the sampling tube 1. Then rotate the sampling tube 1 upside down. The water and fry in the sampling tube 1 enter the accommodating chamber 3 formed by the end cover 2. Since the accommodating chamber 3 is formed with an observation part 6 and a reference part 7, the taken out fry can be observed in the accommodating chamber 3 of the end cover 2, and the specifications of the fry can be directly viewed, and whether the fry are of uniform specifications and whether there is food in the stomach. Thus, the various conditions of the fry can be directly observed. At the same time, the white reference part 7 is used as a background to facilitate the observation of transparent fry.

[0038] like Figure 1 、 Figure 2 and Figure 7 As shown, in this embodiment, a plurality of white observation rulers 8 are fixedly connected between the observation portion 6 and the reference portion 7 , with a gap left between two adjacent white observation rulers 8 , and scale lines 9 are provided on the white observation rulers 8 .

[0039] Through the white observation ruler 8 and the scale line 9 between the observation part 6 and the reference part 7, the specifications and degree of the fry can be directly viewed without taking out the fry for viewing, which is more convenient to use.

[0040] like Figure 2 and Figure 3 As shown, in this embodiment, the sampling tube 1 is made of a transparent material, and a first groove 10 is provided on both the front and rear sides of the sampling tube 1, and a depth line 11 is provided on the inner wall of the first groove 10; the sampling tube 1 is made of a transparent material, so that after water and fry enter the sampling tube 1 from the sampling port 4, the sampling tube 1 can be quickly removed or the sampling port 4 can be blocked to prevent the fry from escaping.

[0041] like Figure 3 and Figure 4 As shown, in this embodiment, the outer surface of the bottom end of the sampling tube 1 is provided with an external thread 12 and is threadedly connected to a fixing seat 13, and four supporting legs 14 are fixedly connected to the edge of the lower surface of the fixing seat 13; the outer surface of the bottom end of the sampling tube 1 is threadedly connected to a locking nut 15, and the locking nut 15 is located on the upper surface of the fixing seat 13, and the outer surface of the locking nut 15 is provided with anti-slip grooves.

[0042] By tightening the locking nut 15, the fixing base 13 is prevented from rotating at will. When adjusting the sampling depth, the locking nut 15 is loosened, and then the fixing base 13 is rotated to drive the support leg 14 to rotate. Since the fixing base 13 is threadedly connected to the external thread 12 on the sampling tube 1, the fixing base 13 can drive the support leg 14 to move during the rotation process, thereby better determining the sampling height.

[0043] like Figure 6 and Figure 7 As shown, in this embodiment, a threaded step groove 201 is provided on the lower surface of the end cap 2, and the top end of the sampling tube 1 is threadedly connected to the inside of the step groove 201 and is provided with a sealing gasket 202; in this way, the connection between the end cap 2 and the sampling tube 1 is more firmly, avoiding water leakage, and the end cap 2 can be removed from the sampling tube 1 to better observe the fry.

[0044] like Figure 3 and Figure 4 As shown, in this embodiment, a closing component 16 is installed at the bottom end of the sampling tube 1 and on the left side of the sampling port 4, the control hole 5 is provided on the right side of the sampling tube 1, and a control component 17 is provided on the left side of the top end of the sampling tube 1. The control component 17 is used to make the closing component 16 seal the sampling port 4 after the control hole 5 is opened. In this way, a sampling tube 1 with a larger diameter can be used to sample larger fry, and the closing component 16 prevents water from flowing out quickly after being taken out of the water.

[0045] like Figure 4 and Figure 5 As shown, in this embodiment, the sealing assembly 16 includes a mounting plate 1601 fixedly connected to the left side of the bottom end of the sampling tube 1, and the right side of the mounting plate 1601 is rotatably connected to a sealing plate 1603 through a pin 1602, and a torsion spring 1604 is installed between the pin 1602 and the mounting plate 1601, and the lower surface of the mounting plate 1601 is fixedly connected to a bracket 1605, and the bottom end of the bracket 1605 is rotatably connected to a guide wheel 1606; the middle part of the sealing plate 1603 is fixedly connected to a mesh plate 1607, and the mesh diameter of the mesh plate 1607 is smaller than the size of the fry.

[0046] In this way, the sealing plate 1603 can rotate around the pin shaft 1602 and compress the torsion spring 1604, so that the sealing plate 1603 opens to expose the sampling port 4 or closes the sampling port 4. Since the middle part of the sealing plate 1603 is fixedly connected to the mesh plate 1607, and the mesh diameter of the mesh plate 1607 is smaller than the size of the fry, after the water and fry enter the sampling tube 1 from the sampling port 4, the sealing plate 1603 can be quickly closed to prevent the fry from escaping.

[0047] like Figure 4 and Figure 6As shown, in this embodiment, the control component 17 includes a fixed box 1701 fixedly connected to the left and right sides of the sampling tube 1, a second groove 1702 is opened on the left side of the sampling tube 1, a vertical first slide bar 1703 is slidably inserted on the fixed box 1701, a lever 1704 is fixedly connected to the top of the first slide bar 1703, a pull rope 1705 is fixedly connected to the middle of the first slide bar 1703, and an auxiliary wheel 1706 is rotatably connected to the right side of the bottom end of the fixed box 1701. The other end of the pull rope 1705 moves along the auxiliary wheel 1706, the second groove 1702 and the guide wheel 1 606 is fixedly connected to the sealing plate 1603, an upper slot 1707 and a lower slot 1708 are provided on the left side of the first slide bar 1703, a second slide bar 1709 is slidably inserted into the left side of the fixed box 1701, a handle 1710 is fixedly connected to the left side of the second slide bar 1709, the right side of the second slide bar 1709 is located inside the fixed box 1701 and is provided with an inclined surface, a spring 1711 is provided on the outer surface of the second slide bar 1709, one end of the spring 1711 is fixedly connected to the handle 1710, and the other end of the handle 1710 is fixedly connected to the fixed box 1701.

[0048] By pulling the lever 1704, the first slide bar 1703 is driven to move upward. During the upward movement, the first slide bar 1703 can drive the sealing plate 1603 to rotate around the pin shaft 1602 and compress the torsion spring 1604 through the pull rope 1705 until the sealing plate 1603 is opened to expose the sampling port 4. After sampling, the handle 1710 is pulled to drive the second slide bar 1709 to move out of the lower slot 1708. At this time, the restoring force of the torsion spring 1604 drives the sealing plate 1603 to close the sampling port 4 at the bottom end of the sampling tube 1.

[0049] The technical solution provided by the present invention is that when in use, first loosen the locking nut 15, then rotate the fixing base 13 to drive the support leg 14 to rotate. Since the fixing base 13 is threadedly connected to the external thread 12 on the sampling tube 1, the fixing base 13 can drive the support leg 14 to move during the rotation. At the same time, the sampling depth of the sampling port 4 is observed through the depth line 11 in the first groove 10, and then tighten the locking nut 15 to prevent the fixing base 13 from rotating at will. Then, pull the lever 1704 to drive the first slide bar 1703 to move upward, and the first slide bar 1703 During the upward movement, the sealing plate 1603 can be driven by the pull rope 1705 to rotate around the pin 1602 and compress the torsion spring 1604 until the sealing plate 1603 is opened to expose the sampling port 4. At the same time, the upper groove 1707 on the first slide bar 1703 squeezes the right inclined surface of the second slide bar 1709. At this time, the second slide bar 1709 slides to the left and compresses the spring 1711 until the second slide bar 1709 moves to the lower groove 1708. At this time, the restoring force of the spring 1711 causes the second slide bar 1709 to be clamped in the lower groove 1708. Then hold it with your hand. Sampling tube 1 and use the thumb to block the control hole 5, then insert the sampling tube 1 downward into the breeding pond until the support leg 14 contacts the bottom of the pond and reaches the appropriate sampling depth. Since the top of the sampling tube 1 is sealed, the air will be stored at the top, and then loosen the control hole 5. At this time, water and fry will enter the sampling tube 1 from the sampling port 4, and the air will be discharged from the control hole 5. Then pull the handle 1710 to drive the second slide bar 1709 to move out of the lower card slot 1708. At this time, the restoring force of the torsion spring 1604 drives the sealing plate 1603 to open the bottom sampling port 4 of the sampling tube 1. Close it, then block the control hole 5 with your hand, lift the sampling tube 1 upwards, bring out the aquaculture water and fry together, and then rotate the sampling tube 1. Since the end cap 2 at the end of the sampling tube 1 is formed with an observation part 6 and a reference part 7, and the observation part 6 is made of transparent material and the reference part 7 is made of white material, after the aquaculture water and fry are taken out and enter the end cap 2, the white observation ruler 8 and scale line 9 between the observation part 6 and the reference part 7 can be used to directly see the specifications of the fry, check whether the fry are of uniform size and whether there is food in their stomachs, so that various conditions of the fry can be directly observed.

[0050] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0051] Those skilled in the art will understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fry sampling device for aquaculture, characterized in that: The invention comprises a sampling tube (1), one end of which is fixedly connected to an end cap (2) and forms a receiving cavity (3), the other end of which is provided with a sampling port (4), a control hole (5) is provided on a side of the sampling tube (1) close to the end cap (2), and an observation portion (6) and a reference portion (7) are respectively formed on the front and rear sides of the receiving cavity (3), the observation portion (6) is made of a transparent material, and the reference portion (7) is made of a white material.

2. The fish fry sampling device for aquaculture according to claim 1, characterized in that: A plurality of white observation rulers (8) are fixedly connected between the observation portion (6) and the reference portion (7), with a gap left between two adjacent white observation rulers (8), and scale lines (9) are provided on the white observation rulers (8).

3. The fish fry sampling device for aquaculture according to claim 2, characterized in that: The sampling tube (1) is made of a transparent material. A first groove (10) is provided on both the front and rear sides of the sampling tube (1). A depth line (11) is provided on the inner wall of the first groove (10).

4. The fish fry sampling device for aquaculture according to claim 1, characterized in that: The outer surface of the bottom end of the sampling tube (1) is provided with an external thread (12) and is threadedly connected to a fixing seat (13), and the lower surface edge of the fixing seat (13) is fixedly connected to four supporting legs (14).

5. The fish fry sampling device for aquaculture according to claim 4, characterized in that: The outer surface of the bottom end of the sampling tube (1) is threadedly connected to a locking nut (15), and the locking nut (15) is located on the upper surface of the fixing seat (13). The outer surface of the locking nut (15) is provided with anti-slip grooves.

6. The fish fry sampling device for aquaculture according to claim 5, characterized in that: A threaded step groove (201) is provided on the lower surface of the end cap (2), and the top end of the sampling tube (1) is threadedly connected to the inside of the step groove (201) and is provided with a sealing gasket (202).

7. The fish fry sampling device for aquaculture according to claim 1, characterized in that: A sealing component (16) is installed at the bottom end of the sampling tube (1) and on the left side of the sampling port (4); the control hole (5) is arranged on the right side of the sampling tube (1); and a control component (17) is arranged on the left side of the top end of the sampling tube (1). The control component (17) is used to enable the sealing component (16) to seal the sampling port (4) after the control hole (5) is opened.

8. The fish fry sampling device for aquaculture according to claim 7, characterized in that: The sealing assembly (16) includes a mounting plate (1601) fixedly connected to the left side of the bottom end of the sampling tube (1); the right side of the mounting plate (1601) is rotatably connected to a sealing plate (1603) via a pin (1602); a torsion spring (1604) is installed between the pin (1602) and the mounting plate (1601); the lower surface of the mounting plate (1601) is fixedly connected to a bracket (1605); and the bottom end of the bracket (1605) is rotatably connected to a guide wheel (1606).

9. The fish fry sampling device for aquaculture according to claim 8, characterized in that: A mesh plate (1607) is fixedly connected to the middle of the sealing plate (1603), and the mesh diameter of the mesh plate (1607) is smaller than the size of the fry.

10. The fish fry sampling device for aquaculture according to claim 9, characterized in that: The control assembly (17) includes a fixed box (1701) fixedly connected to the left and right sides of the sampling tube (1), a second groove (1702) is provided on the left side of the sampling tube (1), a vertical first slide bar (1703) is slidably connected to the fixed box (1701), a shift rod (1704) is fixedly connected to the top of the first slide bar (1703), a pull rope (1705) is fixedly connected to the middle of the first slide bar (1703), and an auxiliary wheel (1706) is rotatably connected to the right side of the bottom end of the fixed box (1701), and the other end of the pull rope (1705) is rotated along the auxiliary wheel (1706), the second groove (1702) and the guide wheel (1606). The sealing plate (1603) is fixedly connected, an upper slot (1707) and a lower slot (1708) are provided on the left side of the first slide bar (1703), a second slide bar (1709) is slidably inserted on the left side of the fixed box (1701), a handle (1710) is fixedly connected to the left side of the second slide bar (1709), the right side of the second slide bar (1709) is located inside the fixed box (1701) and is provided with an inclined surface, a spring (1711) is provided on the outer surface of the second slide bar (1709), one end of the spring (1711) is fixedly connected to the handle (1710), and the other end of the handle (1710) is fixedly connected to the fixed box (1701).

Images