Separated fish egg and larval fish sample collecting device

Abstract

The invention discloses a separated fish egg and larval fish sample collection device, and belongs to the technical field of fish egg collection, the collection device comprises a main body, the main body can be suspended and lifted on a ship side, the main body is provided with a flow path allowing a water body to vertically pass through, the flow path is internally provided with a support and a collection part, and the collection part is provided with a net body surrounding the side face of the support; the lower part of the main body is provided with a screen through which fish eggs and larvae can pass, the lower end of the screen body is provided with a lower connecting pipe, the lower connecting pipe is fixed with the lower part of the bracket, the upper end of the screen body is provided with an upper connecting pipe, the upper connecting pipe can slide along the bracket, the screen body can transversely expand in the direction far away from the bracket, and the upper connecting pipe is provided with a conical wall expanding upwards. According to the invention, the net body can be quickly lowered to the required water depth, and the catching area of the net body is enlarged during recovery, so that the catching performance of plankton is improved.

Description

Technical Field

[0001] The invention relates to the technical field of marine resource collection, and in particular to a separate fish egg and fry sample collection device. Background Art

[0002] Collecting fish eggs is an important part of artificial breeding of fish. Most artificially bred fish will ovulate after artificial induction of spawning, either spontaneously or artificially. There are also a few fish that reproduce ovoviviparously, such as most cartilaginous fish and bony fish, whose embryonic development period is completed in the body and are already in the fry stage when they are excreted from the body. In production, the collection of fish eggs and fry of such self-ovulating or ovoviviparous fish is mostly done by spawning in the original pond, removing the broodstock or collecting in cages. However, spawning in the original pond will cause confusion among the offspring, and the need for separate isolation of the offspring cannot be met; and in addition to occupying equipment and the cumbersome process, cage isolation collection often limits the range of activities of the broodstock during the ovulation period, which can also cause problems for some fish that have special requirements for spawning in a fixed location or environment.

[0003] Many farmed marine fishes, such as silver pomfret, yellow croaker, and black sea bream, have the characteristics of continuous, multi-batch, and small-scale spawning during the spawning period. Many of these fish eggs are floating or semi-floating eggs after fertilization. In order to collect these fish eggs as much as possible, it is necessary to use artificial trawl nets or filter the discharged seawater with nets after a large amount of drainage to collect them. The above methods not only damage the fish eggs, reduce the hatching rate of fry, and waste a lot of manpower and water resources, but also easily scratch the parent fish when catching eggs, and make them frightened.

[0004] In order to solve the above problems existing in the prior art, a Korean invention patent with publication number KR102203796B1 discloses a plankton collection device, which includes a mesh in the main body, which can be extended laterally under the action of water pressure to salvage the organisms that reach above it. The invention ensures the safety of workers when the main body is recovered, and the extendable mesh can increase the capture of plankton. However, in the prior art, in the process of collecting fish eggs by moving the net, the mesh of the net is too large, which easily causes small fish eggs to leak out, reducing the capture amount, and the fish eggs are easily cut when the net is gathered, destroying the integrity of the fish eggs and reducing their quality. Summary of the invention

[0005] The object of the present invention is to provide a separate fish egg and fry sample collection device which is easy to operate and has a high collection volume and collection quality.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: A separate fish egg, larvae and juvenile fish sample collection device comprises a main body which can be suspended and lifted on the side of a ship, has a flow path allowing water to pass vertically, has a bracket and a collection piece in the flow path, and has a net body surrounding the side of the bracket.

[0007] Preferably, the lower part of the main body has a screen through which fish eggs and larvae can pass.

[0008] Preferably, a lower connecting pipe is provided at the lower end of the net body, the lower connecting pipe is fixed to the lower part of the bracket, an upper connecting pipe is provided at the upper end of the net body, the upper connecting pipe can slide along the bracket, the net body can expand laterally in the direction away from the bracket, and the upper connecting pipe has a tapered wall that expands upward. When the main body is put into the water through the hull, the screen filters adult fish and other large substances, so that the water body carries fish eggs and fry and fry and flows upward in the flow path after passing through the screen. During the sinking process of the main body, the tapered wall is subjected to the force of the upward flowing water body, and the upper connecting pipe slides upward relative to the bracket. Since the bottom of the net body is fixed relative to the bracket through the lower connecting pipe, the net body is stretched along the extension direction of the bracket and folded on the periphery of the bracket, which helps to accelerate the speed of the main body reaching the preset depth after sinking by reducing the lateral contact area between the net body and the water body, thereby improving the collection efficiency. At the same time, through the bonding of the net body to the bracket, the center of gravity of the entire collection device is stabilized, which helps to keep the vertical and stable posture of the main body during the sinking process, improve the collection effect of fish eggs and fry and fry, and also helps to reduce the interference with the equipment used to lift the collection piece. After the main body is submerged for a period of time, the fish eggs and fry reach the space above the screen, and the main body is pulled up. At this time, under the action of water pressure and self-gravity, the upper connecting pipe moves downward relative to the support, so that the net body is diffusely expanded in the direction away from the support, so that the upper part of the net body can be attached to the lower part of the net body to form an overlap, and the outer edge of the overlapping net body can abut against the inner side of the main body to form a blockade of the bottom of the flow channel, so that the fish eggs and fry above them are collected. The overall collection process only requires the main body to be lowered and raised, and the water pressure and dead weight are used to realize the contraction and expansion of the net body, so that the fish eggs and fry are entered and intercepted and collected, which is convenient for operation and improves the collection efficiency; The conical wall can be better acted upon by the flowing water during the rising process, thereby increasing the sliding speed of the upper connecting pipe on the bracket, thereby increasing the overlapping speed of the net body, reducing the probability of leakage of fish eggs and fry, and being beneficial to increasing the collection volume.

[0009] Preferably, the flow path also has a guide member, which includes a support ring matched with the inner wall of the main body, and an extension plate on the top of the support ring, which bends and extends toward the lower part of the bracket, and the extension plate is a flexible plate. When the main body is put into the water and sinks, the water body carries fish eggs and fry and fry quickly through the flow channel, and some of the fish eggs and fry and fry flow quickly along the inner wall of the main body, and are easy to leave the main body and cannot be collected. The extension plate can be impacted by the upward water flow and deformed when the main body sinks, so that the extension plate forms a horizontal posture close to the bracket. The extension plate in this posture can intercept the fish eggs and fry and fry accompanying the water body upstream, thereby reducing the number of fish eggs and fry and fry lost from the flow channel; During the process of the main body being recovered and rising out of the water body, the extension plate is deformed under the action of water pressure, so that the extension plate is deformed toward the support ring. At the same time, the net body is unfolded toward the support ring. At this time, the deformed extension plate provides a space for the net body to unfold on the one hand, and on the other hand, it is shaped for the unfolding of the net body, so as to ensure that the upper and lower parts of the net body can overlap evenly, and reduce the possibility of the net wire being entangled due to local collapse during the overlapping process of the net body, thereby reducing the possibility of the fish eggs and fry being entangled by the net wire and being difficult to remove after the device is recovered, and improving the portability of the fish eggs and fry after the collection is completed. As the main body is rising, the process of overlapping and deforming the net body takes time. During the deformation process, the extension plate can guide the water flowing downward in the flow channel to the middle part. On the one hand, the guided water flow is used to accelerate the speed of net overlapping, reduce the number of escaped fish eggs and fry, thereby increasing the collection amount. On the other hand, it is beneficial to reduce the contact amount between the water body and the fish eggs and fry intercepted by the extension plate, further reduce the probability of fish eggs and fry leaking from the flow channel, and increase the collection amount.

[0010] Preferably, the guide members are arranged at intervals along the extension direction of the flow path, and a storage cavity is formed between two adjacent extension plates and the support ring therebetween. When the main body is out of water, the downwardly swung and deformed extension plate can form a storage cavity with the extension plate below it and the support ring therebetween to collect the fish eggs and fry intercepted when submerged. After the main body is out of water, the main body is laid flat or inverted, and the fish eggs and fry collected in the storage cavity can be poured out by taking out each guide member from outside to inside in turn, so as to achieve rapid collection, reduce the difficulty of taking out the fish eggs and fry, thereby reducing the possibility of damage to the collected objects, and ensure the quality of the fish eggs and fry, and because the extension plate is a flexible plate, its edge will not scratch the fish eggs and fry passing by.

[0011] Preferably, the inner wall of the main body has a receiving portion, and the receiving portion supports the bottom of the lowermost flow guide member.

[0012] Preferably, the bracket has a spirally wound protrusion on the outside, and the upper connecting tube has a guide groove on the inner wall that cooperates with the protrusion, and the upper connecting tube can rotate and slide on the outside of the bracket through the cooperation between the protrusion and the guide groove. The cooperation between the protrusion and the guide groove allows the upper connecting tube to rotate during the relative sliding process of the bracket, causing the upper part of the net body to rotate relative to the lower part during the process of contraction and expansion, which is conducive to the misalignment of the mesh at the upper part of the net body and the mesh at the lower part of the net body, that is, the mesh gap formed after the net body overlaps is smaller, and the interception and collection capacity of the net body for fish eggs and fry is improved without increasing the number of net lines, while reducing the manufacturing cost and increasing the collection volume; The small mesh gap can reduce the possibility of fish eggs and fish fry getting stuck in the mesh, thus improving the quality of fish eggs and fish fry collected by the net; The relatively rotating upper and lower parts of the net body can rub against each other during the overlapping process, which promotes the scraping of attached mud and sand. The scraped mud and sand are discharged from the main body along with the falling water during the rising process. On the one hand, it reduces the weight gain caused by the mud and sand when the collection device is recovered, improves the safety of the main body recovery, and reduces the load on the recovery main body equipment. On the other hand, it reduces the possibility of mud and sand mixing with fish eggs after the device is recovered and being difficult to separate, thereby improving the screening efficiency.

[0013] Preferably, the mesh body has reinforcing ribs, the reinforcing ribs have a length along the extension direction of the bracket, and the reinforcing ribs are fixedly arranged around the periphery of the mesh body based on the bracket. The arrangement of the reinforcing ribs improves the overall structural strength of the mesh body, and also facilitates regular deformation of the upper and lower parts of the mesh body, reducing the possibility of entanglement.

[0014] Preferably, the main body and the bracket have a connecting ring at the upper end, and the connecting ring is used to connect the traction rope.

[0015] Preferably, a mounting hole is provided on the side of the lower connecting pipe, and the lower connecting pipe is connected to the bracket by a threaded fastener passing through the mounting hole, and the height position of the lower connecting pipe on the bracket is adjustable.

[0016] Compared with the prior art, the invention has the following beneficial effects: the net body can be respectively contracted and expanded when sinking and emerging from the water, and when contracted, the auxiliary device can quickly reach the preset water depth, thereby improving the deployment efficiency, and when expanded, the capture area can be enlarged, thereby improving the collection amount; when the guide member enters the water, the fast-floating fish eggs and fry fish are intercepted, thereby reducing the escape amount; when the guide member emerges from the water, the guide member guides the falling water body toward the middle, thereby ensuring that the intercepted part is not lost due to the influence of the water flow, thereby realizing auxiliary collection; the guide member deforms and shapes the net body, thereby reducing the probability of the net body being entangled; the guide members arranged at intervals form a storage cavity, thereby facilitating the transfer and storage efficiency of the fish eggs and fry fish; the bracket and the upper connecting pipe realize relative sliding rotation through the protrusions and the guide grooves, and the mesh gap formed after the net bodies are overlapped is smaller, and the net body is improved for fish eggs without increasing the number of net lines, thereby reducing the production cost and the collection amount; the formed fine mesh can reduce the possibility of fish eggs and fry fish being stuck, thereby improving the quality of the fish eggs and fry fish. The twisted mesh removes sediment, reduces the amount of sediment mixing, and improves screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 The figure is a schematic diagram of a separate fish egg and fry sample collection device; Figure 2 It is a cross-sectional schematic diagram of a separate fish egg and fry sample collection device; Figure 3 for Figure 2 A magnified schematic diagram of the middle A area; Figure 4 for Figure 2 A magnified schematic diagram of the middle B area; Figure 5 for Figure 2 Enlarged schematic diagram of the middle C area; Figure 6 Schematic diagram of the connection between the conical sleeve and the blade.

[0019] Figure numbers: main body 1; flow path 10; connecting ring 11; bracket 2; collecting piece 3; mesh body 30; lower connecting pipe 31; upper connecting pipe 32; conical wall 320; reinforcing beam 310; screen 4; guide piece 5; supporting ring 51; extension plate 52; receiving part 53; protrusion 6; guide groove 7; conical sleeve 8; blade 9. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0022] See attached Figure 1 -Attached Figure 2 A separate fish egg and fry sample collection device includes: a main body 1, which can be suspended and lifted on the side of a ship, and has a flow path 10 that allows water to pass vertically, and the flow path 10 has a bracket 2 and a collecting piece 3, and the collecting piece 3 has a net body 30 surrounding the side of the bracket 2.

[0023] The lower part of the main body 1 is provided with a screen 4 through which fish eggs and larvae can pass.

[0024] A lower connecting tube 31 is provided at the lower end of the net body 30, and the lower connecting tube 31 is fixed to the lower part of the bracket 2. An upper connecting tube 32 is provided at the upper end of the net body 30, and the upper connecting tube 32 can slide along the bracket 2. The net body 30 can expand laterally in a direction away from the bracket 2, and the upper connecting tube 32 has an upwardly expanding conical wall 320.

[0025] When the main body 1 is put into the water through the hull, the screen 4 filters adult fish and other large substances, so that the water body carries fish eggs and fry and fry and flows upward in the flow path 10 after passing through the screen 4. During the sinking process of the main body 1, the conical wall 320 is subjected to the force of the upward flowing water body, and the upper connecting pipe 32 is carried to slide upward relative to the bracket 2. Since the bottom of the net body 30 is fixed relative to the bracket 2 through the lower connecting pipe 31, the net body 30 is stretched along the extension direction of the bracket 2 and folded on the periphery of the bracket 2, which helps to accelerate the speed of the main body 1 reaching a preset depth after sinking by reducing the lateral contact area between the net body 30 and the water body, thereby improving the collection efficiency. At the same time, the fitting of the net body 30 to the bracket 2 stabilizes the center of gravity of the entire collection device, which helps to keep the main body 1 in a vertical and stable posture during the sinking process, improves the collection effect of fish eggs and fry and fry, and is also conducive to reducing the interference with the equipment used to lift the collection member 3. After the main body 1 is submerged for a period of time, the fish eggs and fry reach the space above the screen 4, and the main body 1 is pulled up. At this time, under the action of water pressure and its own gravity, the upper connecting pipe 32 moves downward relative to the support 2, so that the net body 30 is diffusely expanded in the direction away from the support 2, so that the upper part of the net body 30 can be attached to the lower part of the net body 30 to form an overlap, and the outer edge of the overlapped net body 30 can abut against the inner side of the main body 1 to form a blockade of the bottom of the flow channel, so that the fish eggs and fry above it are collected. The overall collection process only needs to lower and raise the main body 1, and the water pressure and deadweight are used to realize the contraction and expansion of the net body 30, so as to complete the entry and interception and collection of fish eggs and fry, which is convenient for operation and improves the collection efficiency; The conical wall 320 can be better acted upon by the flowing water during the rising process, thereby increasing the sliding speed of the upper connecting pipe 32 on the bracket 2, thereby increasing the overlapping speed of the net body 30, reducing the probability of fish eggs and fry leaking out, and being beneficial to increasing the collection amount.

[0026] See attached Figure 3 The flow path 10 also has a flow guide 5, which includes a support ring 51 that cooperates with the inner wall of the main body 1. The top of the support ring 51 has an extension plate 52, which bends and extends toward the lower part of the bracket 2, and the extension plate 52 is a flexible plate.

[0027] During the process of the main body 1 being put into the water, the water body carries the fish eggs and fish larvae and fry through the flow channel quickly, and some of the fish eggs and fish larvae and fry flow quickly along the inner wall of the main body 1, and are easy to leave the main body 1 and cannot be collected. When the main body 1 sinks, the extension plate 52 can be impacted by the upward water flow and deformed, so that the extension plate 52 forms a horizontal posture close to the bracket 2. In this posture, the extension plate 52 can intercept the fish eggs and fish larvae and fry accompanying the water body upstream, thereby reducing the number of fish eggs and fish larvae and fry lost from the flow channel; During the process of the main body 1 being recovered and ascending to leave the water body, the extension plate 52 is deformed under the action of water pressure, so that the extension plate 52 is deformed toward the support ring 51. At the same time, the net body 30 is unfolded toward the direction close to the support ring 51. At this time, the deformed extension plate 52 provides a space for the net body 30 to unfold on the one hand, and on the other hand, it is shaped for the unfolding of the net body 30, so as to ensure that the upper and lower parts of the net body 30 can overlap evenly, and reduce the possibility of the net wire being entangled due to local collapse during the overlapping process of the net body 30, thereby reducing the possibility of the fish eggs and fry being entangled by the net wire and being difficult to remove after the device is recovered, and improving the portability of the fish eggs and fry after the collection is completed; As the main body 1 is rising, the overlapping deformation process of the net body 30 takes time. During the deformation process, the extension plate 52 can guide the water flowing downward in the flow channel to the middle part. On the one hand, the guided water flow is used to accelerate the overlapping speed of the net body 30, reduce the number of escaped fish eggs and fry, thereby increasing the collection amount. On the other hand, it is helpful to reduce the contact amount between the water body and the fish eggs and fry intercepted by the extension plate 52, further reduce the probability of fish eggs and fry leaking from the flow channel, and increase the collection amount.

[0028] The flow guide members 5 are arranged at intervals along the extension direction of the flow path 10 , and a storage cavity is formed between two adjacent extension plates 52 and the support ring 51 therebetween.

[0029] When the main body 1 is out of water, the downwardly swung and deformed extension plate 52 can form a storage chamber with the extension plate 52 below it and the support ring 51 therebetween to collect the fish eggs and fish larvae intercepted when submerged. After the main body 1 is out of water, the main body 1 is laid flat or inverted, and the fish eggs and fish larvae collected in the storage chamber can be poured out by taking out each guide member 5 from the outside to the inside in sequence, so as to achieve rapid collection, reduce the difficulty of taking out the fish eggs and fish larvae, thereby reducing the possibility of damage to the collected objects, and ensuring the quality of the fish eggs and fish larvae. Moreover, since the extension plate 52 is a flexible plate, its edge will not scratch the fish eggs and fish larvae passing by.

[0030] The inner wall of the main body 1 has a receiving portion 53 , and the receiving portion 53 supports the bottom of the lowermost flow guide member 5 .

[0031] During installation, the guide members 5 are placed in the main body 1 in sequence, and the receiving portion 53 forms a bottom support for the support ring 51 of the lowest guide member 5, and the remaining support rings 51 are formed with bottom support by the support rings 51 below them, thereby completing the equal-spaced stacking of multiple guide members 5.

[0032] See attached Figure 4 The support 2 has a spirally wound protrusion 6 on the outside, and the upper connecting tube 32 has a guide groove 7 on the inner wall that cooperates with the protrusion 6. The upper connecting tube 32 can rotate and slide on the outside of the support 2 through the cooperation between the protrusion 6 and the guide groove 7. The cooperation between the protrusion 6 and the guide groove 7 allows the upper connecting tube 32 to rotate during the sliding process relative to the support 2, causing the upper part of the net body 30 to rotate relative to the lower part during the process of contraction and expansion, which is conducive to the misalignment of the mesh of the upper part of the net body 30 and the mesh of the lower part of the net body 30, that is, the mesh gap formed after the net body 30 overlaps is smaller, and the interception and collection capabilities of the net body 30 for fish eggs, fry and juveniles are improved without increasing the number of net lines of the net body 30, while reducing the manufacturing cost and increasing the collection volume; The fine mesh gap can reduce the possibility of fish eggs and fish larvae being stuck in the mesh, thereby improving the quality of fish eggs and fish larvae collected by the net body 30; The net body 30 has a reinforcing rib having a length along the extension direction of the bracket 2, and the reinforcing rib is fixedly arranged around the outer periphery of the net body 30 based on the bracket 2. The arrangement of the reinforcing rib improves the overall structural strength of the net body 30, and also facilitates regular deformation of the upper and lower parts of the net body 30, reducing the possibility of entanglement.

[0033] The main body 1 and the bracket 2 have a connecting ring 11 at the upper end, and the connecting ring 11 is used to connect the traction rope.

[0034] See attached Figure 5 The lower connecting pipe 31 has a mounting hole on its side, and the lower connecting pipe 31 is connected to the bracket 2 by a threaded fastener passing through the mounting hole. The height position of the lower connecting pipe 31 on the bracket 2 is adjustable.

[0035] After confirming the height position of the connecting pipe on the bracket 2 according to the requirements, the threaded fastener is passed through the mounting hole and tightened so that the head of the threaded fastener is against the side of the bracket 2 to achieve adjustable installation of the lower connecting pipe 31.

[0036] The threaded fasteners realize the detachable connection between the lower connecting pipe 31 and the bracket 2. By loosening the threaded fasteners, the collecting member 3 can be taken out from below the main body 1 as a whole, so that the collected fish eggs and fry can be processed centrally.

[0037] See attached Figure 6 The conical sleeve 8 is surrounded by a blade 9 on the outer side.

[0038] It should be noted that, in order to reduce the overall weight of the device and ensure the mobility of the upper connecting pipe 32, the blade 9 is made of a buoyant foam board.

[0039] During the submergence of the main body 1, the upper connecting pipe 32 rotates and slides upward relative to the bracket 2, synchronously driving the blades 9 on the conical sleeve 8 to rotate. The rotation of the blades 9 causes the water in the flow channel to form an upward vortex, which can guide the fish eggs and fry passing upward to flow along the inner wall of the main body 1, thereby increasing the probability and number of fish eggs and fry being intercepted by the extension plate 52, and further increasing the collection amount; The vortex generated by the rotation of the blade 9 can be continuously guided through the water in the flow channel, reducing the impact of the lateral water on the main body 1, helping the main body 1 to maintain a vertical posture when entering the water, thereby improving the efficiency and stability of the device when it is deployed into the water; at the same time, it can also reduce the shaking of the hull, which is beneficial to improving the stability of the hull.

[0040] During the process of the main body 1 rising up and discharging water, the upper connecting pipe 32 rotates and slides downward relative to the bracket 2. At this time, the rotation of the blade 9 causes the water in the flow channel to form a downward vortex. The downward vortex can promote the water to carry mud and sand through the net body 30 and the bottom screen 4 to be discharged from the main body 1. On the one hand, it reduces the weight gain caused by mud and sand when the collection device is recovered, improves the safety of the recovery of the main body 1, and reduces the load of the equipment for recovering the main body 1. On the other hand, it realizes the cleaning of the collected material, reduces the possibility of mud and sand mixing with fish eggs after the device is recovered and difficult to separate, optimizes the cleaning process, and improves the screening efficiency.

[0041] The downward vortex can act on the mesh 30, causing the mesh wires of the mesh 30 to float along the rotation direction of the vortex during the unfolding process, that is, the mesh wires of the mesh 30 are evenly spaced from each other during the unfolding process, which can effectively reduce the possibility of the mesh 30 being entangled with itself.

[0042] The upward swirl flow and the downward swirl flow can clean the bracket 2, ensuring that the upper connecting tube 32 can slide and rotate smoothly, so as to ensure the interception and capture capability of the net body 30 for the collected objects.

[0043] Since the blade 9 is made of a buoyant foam material, when the main body 1 sinks into the water, the blade 9 can assist the upper connecting pipe 32 to move up quickly on the bracket 2, thereby reducing the water resistance of the net body 30 and increasing the sinking speed.

[0044] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A separate fish egg and fry sample collection device, comprising: A main body (1) is capable of being suspended and lifted on the side of a ship, and is characterized in that: the main body (1) has a flow path (10) that allows water to pass vertically, the flow path (10) has a bracket (2) and a collecting member (3), and the collecting member (3) has a net body (30) surrounding the side of the bracket (2).

2. A separate fish egg and fry sample collection device according to claim 1, characterized in that: The lower part of the main body (1) is provided with a screen (4) through which fish eggs and fry can pass.

3. A separate fish egg and fry sample collection device according to claim 1, characterized in that: A lower connecting tube (31) is provided at the lower end of the net body (30), the lower connecting tube (31) being fixed to the lower part of the bracket (2), and an upper connecting tube (32) is provided at the upper end of the net body (30), the upper connecting tube (32) being able to slide along the bracket (2), the net body (30) being able to expand laterally in a direction away from the bracket (2), and the upper connecting tube (32) having a tapered wall (320) expanding upward.

4. A separate fish egg and fry sample collection device according to claim 1, characterized in that: The flow path (10) also has a flow guide (5), the flow guide (5) comprising a support ring (51) matched with the inner wall of the main body (1), the top of the support ring (51) having an extension plate (52), the extension plate (52) being bent and extended toward the lower part of the bracket (2), and the extension plate (52) being a flexible plate.

5. A separate fish egg and fry sample collection device according to claim 4, characterized in that: The flow guide members (5) are arranged at intervals along the extension direction of the flow path (10), and a storage cavity is formed between two adjacent extension plates (52) and the support ring therebetween.

6. A separate fish egg and fry sample collection device according to claim 1, characterized in that: The inner wall of the main body (1) has a receiving portion (53), and the receiving portion (53) supports the bottom of the flow guide member (5) at the bottom.

7. A separate fish egg and fry sample collection device according to claim 1, characterized in that: The support (2) has a spirally wound protrusion (6) on the outside, and the upper connecting tube (32) has a guide groove (7) on the inner wall that cooperates with the protrusion (6). The upper connecting tube (32) can rotate and slide on the outside of the support (2) through the cooperation between the protrusion (6) and the guide groove (7).

8. The separated fish egg and fry sample collecting device according to claim 1 is characterized in that: The net body (30) has a reinforcing rib (310), the reinforcing rib (310) having a length along the extension direction of the bracket (2), and the reinforcing rib (310) is fixedly arranged around the periphery of the net body (30) based on the bracket (2).

9. A separate fish egg and fry sample collection device according to claim 1, characterized in that: The main body (1) and the bracket (2) have a connecting ring (11) at the upper end, and the connecting ring (11) is used to connect a traction rope (12).

10. The separated fish egg and fry sample collection device according to claim 1, characterized in that: The lower connecting tube (31) has a mounting hole on its side, and the lower connecting tube (31) is connected to the bracket (2) via a threaded fastener passing through the mounting hole, and the height position of the lower connecting tube (31) on the bracket (2) is adjustable.

Images