Device for collecting stream fishes and eggs and fries

Abstract

The utility model discloses a device for collecting stream fishes and eggs, which comprises a frame, grips are symmetrically arranged on two sides of the frame, a cloth cover is arranged on the inner side of the frame, a compression ring is arranged on the inner side of the cloth cover, the cloth cover is compressed on the inner side of the frame by the compression ring, a netting is arranged at the rear end of the cloth cover, and the netting can be quickly detached and replaced. A flow guide plate is arranged at the bottom of the frame, and the flow guide plate is detachably connected with the frame. Through the design of the netting, netting gears with different mesh numbers can be rapidly replaced, and the requirements of various collection objects are met; a worker holds the grip to push the whole collecting device from the bottom of the stream, so that the effect can be achieved; a flow guide plate structure can buffer water flow impact, and physical damage to eggs and seedlings is reduced in cooperation with a bottom-attaching moving mode; the light frame reduces water disturbance during operation, and the stability of the collection environment is maintained. Through cooperative operation of two persons and the design of the movable base, the device can be quickly propelled in a stream substrate, and large-area sampling is realized.

Description

Technical Field

[0001] This utility model belongs to the field of aquatic resource survey technology, specifically relating to a device for collecting stream fish and fry. Background Technology

[0002] In stream ecosystem research and aquatic resource surveys, collecting early-stage fish resources (such as fertilized eggs and larvae) has always been a challenge. Traditional collection methods, such as hand nets and trap nets, have drawbacks such as inconvenience in operation, low sampling efficiency, and a tendency to result in incomplete samples.

[0003] A utility model patent with publication number CN215123495U discloses a novel fish sample collection bag, comprising a bag body, including a top bag body and a bottom bag body detachably connected to the top bag body; a separation component disposed within the top bag body, the separation component including a plurality of conical separation nets arranged side by side within the top bag body, the bottom bag body being divided into a plurality of compartments corresponding one-to-one with the conical separation nets; and a support component, the bag body being connected to the support component, the support component being used to support the bag body.

[0004] The novel fish sample collection bag provided by the aforementioned patent is convenient to operate as it can be manipulated by workers using a telescopic pole. However, most fish and fry in actual streams are benthic, residing at the bottom. Using the existing collection devices makes it difficult to accurately collect benthic fish and fry, easily leading to sample omissions. Furthermore, the net specifications cannot be flexibly adjusted according to the size of the sample, resulting in poor versatility. Therefore, there is an urgent need for a collection device that is easy to operate, causes minimal sample damage, and is highly adaptable. Utility Model Content

[0005] The purpose of this invention is to provide a device for collecting stream fish and fry, in order to solve the problems mentioned in the background art, such as the difficulty of accurately collecting benthic fish and fry, the easy omission of samples, and the inability to flexibly adjust the net specifications according to the size of the collected objects.

[0006] To achieve the above objectives, this utility model provides the following technical solution.

[0007] A device for collecting stream fish and their eggs includes a frame with a handle, a cloth cover inside the frame, a pressure ring inside the cloth cover, and multiple top screws inside the pressure ring to press the cloth cover tightly against the inside of the frame. A net is provided at the rear end of the cloth cover, and the net can be quickly removed and replaced. A flow guide plate is provided at the bottom of the frame, and the flow guide plate is detachably connected to the frame.

[0008] Preferably, the frame is made of aluminum alloy or carbon fiber, the frame is rectangular in shape, and the bottom of the frame is parallel to the bottom of the stream.

[0009] Preferably, the frame has slots at the bottom and top of the front side, and multiple clamping knobs are provided on the inner side of the frame aligned with the slots; the handle is provided with an anti-slip sleeve.

[0010] Preferably, the front edge of the fabric cover is provided with a binding cord, and the rear edge of the fabric cover is provided with a first pull-tab, and a pull head is connected to the first pull-tab.

[0011] Preferably, the front end of the mesh garment is provided with a connecting part, and the front end of the connecting part is provided with a second pull-opening part. The second pull-opening part cooperates with the first pull-opening part and the pull head to connect the mesh garment and the fabric cover.

[0012] Preferably, the inner side of the net is provided with a barbel opening, and the opening at the rear end of the net is sealed with a binding rope, so that the opening at the rear end of the net can be opened and the fish can be taken out after the collection is completed.

[0013] Preferably, the mesh size of the net is 20-100 mesh, including a 50-100 mesh fine net for collecting fertilized eggs and a 20-50 mesh medium net for collecting larvae and juveniles, and the net material is preferably nylon or polyester fiber.

[0014] Preferably, the guide plate is inclined to the outside of the frame, and the surface of the guide plate is provided with multiple guide grooves, which are arranged from the outside of the guide plate to the inside of the mesh. The end of the guide plate that is not connected to the frame is provided with a cutting edge.

[0015] Preferably, it also includes a movable base, which is engaged with the bottom of the frame, and the movable base frame is detachably connected.

[0016] Preferably, the movable base has symmetrically arranged adapter plates on both sides of its bottom, a movable roller is arranged between the two adapter plates, and a clamping plate is provided at both ends of the top of the movable base, with a clamping bolt on the outer side of the clamping plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model features a net design that allows for quick replacement of nets with different mesh sizes to meet the needs of various collection targets. Workers hold the handle and push the entire collection device from the bottom of the stream, effectively collecting fish and larvae living on the bottom. The inclusion of a flow guide plate structure buffers the impact of the water flow, and the bottom-hugging movement reduces physical damage to the larvae.

[0019] 2. This utility model, through the collaborative operation of two people and the design of a mobile base, can quickly advance the device into the bottom sediment of streams (such as sand, gravel, silt) to achieve large-area sampling; the rear collection bag facilitates centralized collection of samples, shortens operation time, and the corrosion-resistant material frame is suitable for the complex water quality environment of streams, while the detachable parts facilitate cleaning and maintenance, extending the service life of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the frame of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the cloth cover of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the pressure ring of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the mesh garment of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the guide plate of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the movable base of this utility model.

[0027] In the diagram: 1. Frame; 11. Handle; 12. Anti-slip sleeve; 13. Slot; 14. Pressing knob; 2. Fabric cover; 21. Binding rope; 22. First pull-opening part; 23. Pull head; 3. Pressure ring; 31. Top screw; 4. Mesh cover; 41. Connecting part; 42. Beard opening; 43. Second pull-opening part; 44. Binding rope; 5. Guide plate; 51. Blade edge; 52. Guide groove; 53. Insert plate; 6. Moving base; 61. Adapter plate; 62. Moving roller; 63. Clamping plate; 64. Pressing bolt. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1:

[0030] Please see Figure 1 and Figure 4This device, used for collecting stream fish and their eggs, includes a frame 1. Handles 11 are symmetrically arranged on both sides of the frame 1, allowing operators to easily grip and pull the entire collection device in the water. A cloth sleeve 2 is located inside the frame 1, and a pressure ring 3 is located inside the cloth sleeve 2. The pressure ring 3 presses the cloth sleeve 2 tightly against the inside of the frame 1, ensuring its stability within the frame 1. Multiple set screws 31 are located inside the pressure ring 3, which further press the cloth sleeve 2 firmly against the inside of the frame 1. A net 4 is located at the rear end of the cloth sleeve 2. The net 4 can be quickly removed and replaced; the cloth sleeve 2 and net 4 facilitate the collection of fish and their eggs, and the net 4 can be quickly changed to different mesh sizes as needed. A guide plate 5 is located at the bottom of the frame 1, detachably connected to the frame 1. The guide plate 5 guides the water flow, reducing water resistance.

[0031] Please see Figure 2 The frame 1 is made of aluminum alloy or carbon fiber and is rectangular in shape. The bottom of the frame 1 is parallel to the bottom of the stream, facilitating the collection of fish and their eggs. Slots 13 are located at the bottom and top of the front of the frame 1, allowing for easy installation and removal of the guide plate 5. Multiple clamping knobs 14 are located on the inner side of the frame 1, aligned with the slots 13, to secure the guide plate 5. The handle 11 has anti-slip sleeves 12 for easy gripping of the entire collection net.

[0032] Please see Figure 3 The front edge of the fabric cover 2 is provided with a binding cord 21, which can mutually limit the binding cord 2 with the pressure ring 3 to prevent the fabric cover 2 from detaching from the frame 1 and the structure of the pressure ring 3. The rear edge of the fabric cover 2 is provided with a first pull part 22, and a pull head 23 is connected to the first pull part 22. This structure facilitates the detachable connection of the fabric cover 2 and the mesh garment 4.

[0033] Please see Figure 5 The net 4 has a connecting part 41 at its front end, and a second zipper 43 at its front end. The second zipper 43 works in conjunction with the first zipper 22 and the zipper head 23. The first zipper 22, the second zipper 43, and the zipper head 23 form a zipper, allowing the net 4 and the cloth cover 2 to be connected by a convenient zipper. The inside of the net 4 has a barbed opening 42 to prevent fish and fish eggs from easily escaping from the net 4. The rear opening of the net 4 is sealed with a binding rope 44, making it easy to open the rear opening of the net 4 after collection to remove the fish. A counterweight can be attached to the binding rope 44 to press the net 4 into the water. The net 4 has a mesh count of 20-100 mesh, including a 50-100 mesh fine net for collecting fertilized eggs and a 20-50 mesh medium net for collecting larvae and juveniles. After collecting fertilized eggs, the 20-50 mesh medium net can be quickly replaced to collect larvae and juveniles. The mesh garment 4 is made of nylon or polyester fiber.

[0034] Please see Figure 6 The guide plate 5 is inclined outward from the frame 1, and its surface has multiple guide grooves 52. The guide grooves 52 are arranged from the outside of the guide plate 5 towards the inside of the net 4, which facilitates the movement of water along the guide plate 5 and also allows the frame 1 to scrape fish eggs close to the bottom. The end of the guide plate 5 that is not connected to the frame 1 has a cutting edge 51, which can cut water to reduce water resistance.

[0035] Example 2:

[0036] Please see Figure 1 and Figure 4 This device, used for collecting stream fish and their eggs, includes a frame 1. Handles 11 are symmetrically arranged on both sides of the frame 1, allowing operators to easily grip and pull the entire collection device in the water. A cloth sleeve 2 is located inside the frame 1, and a pressure ring 3 is located inside the cloth sleeve 2. The pressure ring 3 presses the cloth sleeve 2 tightly against the inside of the frame 1, ensuring its stability within the frame 1. Multiple set screws 31 are located inside the pressure ring 3, which further press the cloth sleeve 2 firmly against the inside of the frame 1. A net 4 is located at the rear end of the cloth sleeve 2. The net 4 can be quickly removed and replaced; the cloth sleeve 2 and net 4 facilitate the collection of fish and their eggs, and the net 4 can be quickly changed to different mesh sizes as needed. A guide plate 5 is located at the bottom of the frame 1, detachably connected to the frame 1. The guide plate 5 guides the water flow, reducing water resistance.

[0037] Please see Figure 2 The frame 1 is made of aluminum alloy or carbon fiber and is rectangular in shape. The bottom of the frame 1 is parallel to the bottom of the stream, facilitating the collection of fish and their eggs. Slots 13 are located at the bottom and top of the front of the frame 1, allowing for easy installation and removal of the guide plate 5. Multiple clamping knobs 14 are located on the inner side of the frame 1, aligned with the slots 13, to secure the guide plate 5. The handle 11 has anti-slip sleeves 12 for easy gripping of the entire collection net.

[0038] Please see Figure 3 The front edge of the fabric cover 2 is provided with a binding cord 21, which can mutually limit the binding cord 2 with the pressure ring 3 to prevent the fabric cover 2 from detaching from the frame 1 and the structure of the pressure ring 3. The rear edge of the fabric cover 2 is provided with a first pull part 22, and a pull head 23 is connected to the first pull part 22. This structure facilitates the detachable connection of the fabric cover 2 and the mesh garment 4.

[0039] Please see Figure 5The net 4 has a connecting part 41 at its front end, and a second zipper 43 at its front end. The second zipper 43 works in conjunction with the first zipper 22 and the zipper head 23. The first zipper 22, the second zipper 43, and the zipper head 23 form a zipper, allowing the net 4 and the cloth cover 2 to be connected by a convenient zipper. The inside of the net 4 has a barbed opening 42 to prevent fish and fish eggs from easily escaping from the net 4. The rear opening of the net 4 is sealed with a binding rope 44, making it easy to open the rear opening of the net 4 after collection to remove the fish. A counterweight can be attached to the binding rope 44 to press the net 4 into the water. The net 4 has a mesh count of 20-100 mesh, including a 50-100 mesh fine net for collecting fertilized eggs and a 20-50 mesh medium net for collecting larvae and juveniles. After collecting fertilized eggs, the 20-50 mesh medium net can be quickly replaced to collect larvae and juveniles. The mesh garment 4 is made of nylon or polyester fiber.

[0040] Please see Figure 6 The guide plate 5 is inclined outward from the frame 1, and its surface has multiple guide grooves 52. The guide grooves 52 are arranged from the outside of the guide plate 5 towards the inside of the net 4, which facilitates the movement of water along the guide plate 5 and also allows the frame 1 to scrape fish eggs close to the bottom. The end of the guide plate 5 that is not connected to the frame 1 has a cutting edge 51, which can cut water to reduce water resistance.

[0041] Please see Figure 1 It also includes a movable base 6, which is snapped into the bottom of the frame 1 and is detachably connected to the frame 1. This allows operators to easily and quickly pull the entire data collection device underwater using the movable base 6.

[0042] Please see Figure 7 The movable base 6 has symmetrically arranged adapter plates 61 on both sides of its bottom. A movable roller 62 is arranged between the two adapter plates 61. The adapter plates 61 cooperate with the movable roller 62 to facilitate the rotation of the movable roller 62, which helps to move and use the entire movable base 6 flexibly. Both ends of the top of the movable base 6 are provided with locking plates 63. The outer side of the locking plates 63 is provided with clamping bolts 64. The locking plates 63 and clamping bolts 64 are used to easily engage with the frame 1, so that the entire movable base 6 can be stably installed at the bottom of the frame 1.

[0043] Working principle: When using the device, select the appropriate net 4 according to the target fish species. For collecting fertilized eggs, use a 50-100 mesh fine net. Two staff members hold the handles 11 on their left and right sides respectively, then pull the entire collection device along the bottom of the water. Two people simultaneously pull the device forward quickly with one hand on each handle 11 to collect the fertilized eggs. After collecting the fertilized eggs, open the rear opening of the net 4 and remove the eggs. If collecting larvae or juveniles, replace the net with a 20-50 mesh medium net, and then two staff members continue to pull the collection device in the water. The operation is simple and convenient.

[0044] In summary, this application utilizes a net design 4 that allows for quick replacement of nets with different mesh sizes to accommodate various collection needs. Workers hold the handle 11 and push the entire collection device from the bottom of the stream, effectively collecting fish and larvae living on the bottom. The guide plate 5 buffers the impact of water flow, and combined with the bottom-hugging movement, reduces physical damage to the larvae. The lightweight frame 1 minimizes water disturbance during operation, maintaining the stability of the collection environment.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for collecting stream fish and their eggs, comprising a frame (1), characterized in that: The frame (1) is provided with a handle (11), the inner side of the frame (1) is provided with a cloth cover (2), the inner side of the cloth cover (2) is provided with a pressure ring (3), the pressure ring (3) is provided with multiple top screws (31), the cloth cover (2) is pressed tightly to the inner side of the frame (1) by the top screws (31), and the rear end of the cloth cover (2) is detachably provided with a mesh cover (4); the bottom of the frame (1) is provided with a flow guide plate (5), and the flow guide plate (5) and the frame (1) are detachably connected.

2. The device for collecting stream fish and fry according to claim 1, characterized in that: The frame (1) is made of aluminum alloy or carbon fiber, and the frame (1) is rectangular in shape. The bottom of the frame (1) is parallel to the bottom of the stream.

3. The device for collecting stream fish and fry according to claim 2, characterized in that: The frame (1) has slots (13) at the bottom and top of the front, and multiple pressing knobs (14) are provided on the inner side of the frame (1) aligned with the slots (13); the handle (11) is provided with an anti-slip sleeve (12).

4. The device for collecting stream fish and fry according to claim 1, characterized in that: The front edge of the cloth cover (2) is provided with a binding rope (21), and the rear edge of the cloth cover (2) is provided with a first pull-out part (22), and a pull head (23) is connected to the first pull-out part (22).

5. The device for collecting stream fish and fry according to claim 2, characterized in that: The front end of the mesh (4) is provided with a connecting part (41), and the front end of the connecting part (41) is provided with a second pull-opening part (43). The second pull-opening part (43) cooperates with the first pull-opening part (22) and the pull head (23) to pull and connect the mesh (4) and the cloth cover (2).

6. The device for collecting stream fish and fry according to claim 5, characterized in that: The inner side of the net (4) is provided with a barbed opening (42), and the opening at the rear end of the net (4) is sealed by a binding rope (44), so that the opening at the rear end of the net (4) can be opened and the fish can be taken out after the collection is completed.

7. The device for collecting stream fish and fry according to claim 1, characterized in that: The net (4) has a mesh count of 20-100, including a fine net of 50-100 mesh for collecting fertilized eggs and a medium net of 20-50 mesh for collecting larvae and juveniles. The net (4) is preferably made of nylon or polyester fiber.

8. The device for collecting stream fish and fry according to claim 1, characterized in that: The guide plate (5) is inclined to the outside of the frame (1), and the surface of the guide plate (5) is provided with multiple guide grooves (52). The guide grooves (52) are provided from the outside of the guide plate (5) to the inside of the mesh (4). The end of the guide plate (5) that is not connected to the frame (1) is provided with a cutting edge (51).

9. The apparatus for collecting stream fish and their larvae according to any one of claims 1-8, characterized in that: It also includes a movable base (6), which is engaged at the bottom of the frame (1) and is detachably connected to the frame (1).

10. The apparatus for collecting stream fish and fry according to claim 9, characterized in that: The movable base (6) has symmetrically arranged adapter plates (61) on both sides of its bottom, and a movable roller (62) is arranged between the two adapter plates (61). Both ends of the top of the movable base (6) are provided with clamping plates (63), and the outer side of the clamping plates (63) is provided with clamping bolts (64).

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