Single-ship net pushing system for continuously collecting larvae and larvae and macroplankton

Abstract

The utility model discloses a single-ship net pushing system for continuously collecting larvae and macroplankton, which comprises a ship body, a fishing hole is arranged on the ship body, a fixing support is arranged at the fishing hole, a lifting mechanism is mounted on the fixing support, a lifting part of the lifting mechanism is fixed with an underwater support, an underwater driving motor is arranged on the underwater support, and the underwater driving motor is connected with the fishing hole. An output shaft of the underwater driving motor is coupled with the top end of the switching rod, the bottom end of the switching rod is connected with the net opening ring, and a conical bottom opening of the conical net is connected with the net opening ring. The device disclosed by the utility model can work in a narrow water body or a lake, the fish larvae or macroplankton can be collected by using conical netting gears with different meshes, and due to the fact that captured samples are easily taken out from the collection bag, continuous work can be realized, and the collection efficiency of the fish larvae and the macroplankton in the water body environment is improved.

Description

Technical Field

[0001] This utility model relates to the field of aquatic organism collection technology, and in particular to a single-boat push net system for continuous collection of juvenile fish and large plankton. Background Technology

[0002] Biological monitoring is a crucial foundation for aquatic ecosystem monitoring, assessment, protection, and restoration. However, existing collection tools and methods present numerous inconveniences and limitations when collecting juvenile fish and macroplankton in narrow water bodies (such as small rivers and ditches) and lake sections. Traditional collection nets are difficult to operate in narrow water bodies, hindering continuous and efficient collection operations. Furthermore, their effectiveness is poor under varying depths and flow conditions, failing to meet the demands for precise research into the structure and dynamic changes of these biological communities. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a single-boat push net system for continuous collection of juvenile fish and large plankton.

[0004] The above-mentioned objectives of this utility model are achieved through the following technical means:

[0005] A single-boat push net system for continuous collection of juvenile fish and large plankton includes a hull with a fishing hole and a fixed support at the fishing hole. A lifting mechanism is mounted on the fixed support, and the lifting part of the lifting mechanism is fixed to an underwater support. An underwater drive motor is mounted on the underwater support, and the output shaft of the underwater drive motor is shaft-connected to the top of an adapter rod. The bottom end of the adapter rod is connected to a net opening ring, and the cone bottom opening of the cone-shaped net is connected to the net opening ring.

[0006] As mentioned above, the lifting mechanism is a screw jack or a waterproof electric lifting rod.

[0007] As described above, the adapter rod includes a vertical rod and a horizontal rod. The top of the vertical rod is connected to the output shaft of the underwater drive motor, the bottom of the vertical rod is connected to one end of the horizontal rod, and the other end of the horizontal rod is fixed to the mesh ring.

[0008] As described above, a support ring is provided near the mesh opening ring of the cone-shaped net.

[0009] As mentioned above, a water depth sensor is installed on the underwater support.

[0010] As mentioned above, the water depth sensor is either a pressure-type water depth sensor or an ultrasonic underwater ranging sensor.

[0011] As described above, the cone tip opening of the cone-shaped net is connected to the collection bag.

[0012] As described above, the underwater drive motor, adapter rod, net ring, conical net, and collection bag constitute a collection unit. There are multiple collection units, and the mesh size of the conical net in each collection unit is different.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. This utility model adopts a single boat hull and a conical net suspended from the bottom of the boat, which can operate in narrow water bodies or lakes, solving the problem of difficult sampling work in narrow water bodies;

[0015] 2. This utility model is equipped with a water depth sensor, which can measure the water depth of the underwater support in real time. Then, the lifting mechanism can be adjusted according to the water depth, and the cone net can be adjusted to collect data at the set water layer.

[0016] 3. This utility model can use two or more sets of cone-shaped nets, which can simultaneously collect juvenile fish and large plankton;

[0017] 4. This utility model can customize the size and mesh size of the cone-shaped net according to the specific needs of users, so as to collect juvenile fish or large plankton of different sizes at the same time.

[0018] 5. The bottom of the boat has a fishing hole, which makes it easy to take out the captured samples from the collection bag connected to the cone-shaped net, enabling continuous sampling and improving sampling efficiency. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the ship's hull;

[0020] Figure 2 This is a side view of the present invention;

[0021] Figure 3 This is a schematic diagram of a cone-shaped net.

[0022] 1-Hull; 2-Fishing hole; 3-Fixed bracket; 4-Lifting mechanism; 5-Underwater support; 6-Underwater drive motor; 7-Adapter rod; 701-Vertical rod; 702-Horizontal rod; 8-Net mouth ring; 9-Conical net; 10-Collection bag; 11-Support ring. Detailed Implementation

[0023] To facilitate understanding and implementation of this utility model by those skilled in the art, the present utility model will be further described in detail below with reference to embodiments. It should be understood that the embodiments described herein are only for illustration and explanation of this utility model and are not intended to limit this utility model.

[0024] like Figures 1-3As shown, a single-boat push net system for continuous collection of juvenile fish and large plankton includes a hull 1, on which a hull drive motor and a gearbox are installed. A propeller is installed at the stern of the hull 1. The rotating shaft of the hull drive motor is shaft-connected to the input shaft of the gearbox, and the output shaft of the gearbox is shaft-connected to the rotating shaft of the propeller. The hull 1 adopts a small and flexible boat design with sufficient stability to adapt to navigation conditions in narrow waters. The bow is pointed to reduce resistance when traveling in water.

[0025] The hull 1 is provided with a fishing hole 2, and a fixed bracket 3 is provided at the fishing hole 2. The lifting mechanism 4 is installed on the fixed bracket 3. The lifting part of the lifting mechanism 4 is fixed to the underwater bracket 5. The underwater bracket 5 is provided with an underwater drive motor 6. The output shaft of the underwater drive motor 6 is shaft-connected to the top of the adapter rod 7. The bottom end of the adapter rod 7 is connected to the net mouth ring 8. The cone bottom opening (large end opening) of the cone net 9 is connected to the net mouth ring 8, that is, the edge of the cone bottom opening of the cone net 9 is covered and fixed on the net mouth ring 8. The cone tip opening (small end opening) of the cone net 9 is connected to the collection bag 10.

[0026] In some embodiments, the lifting mechanism 4 may be a waterproof electric telescopic rod (the waterproof electric telescopic rod is an existing commercial module). The waterproof electric telescopic rod is easy to use, can be directly driven by DC power, and is suitable for situations with a small lifting stroke.

[0027] In some embodiments, the lifting mechanism 4 can be a screw jack, with the bottom connecting end of the screw serving as the lifting part. When a screw jack is selected for the lifting mechanism 4, at least three screw jacks are mounted on the fixed support 3. The bottom connecting ends of the screws of the three screw jacks are respectively adapted and connected to the underwater support 5. For example, the bottom connecting end of the screw of the screw jack is connected to the underwater support 5 through a double-direction thrust ball bearing. The bottom connecting end of the screw of the screw jack is fixed to the inner ring of the double-direction thrust ball bearing, and the outer ring of the double-direction thrust ball bearing is connected to the underwater support 5. The double-direction thrust ball bearing can bear a certain axial thrust force, thereby enabling the screw to rotate relative to the underwater support 5, but the screw cannot move axially relative to the underwater support 5. When the screw of the screw jack moves up and down, it drives the underwater support 5 to move up and down through the bottom connecting end. Screw jacks are suitable for situations with a large lifting stroke.

[0028] As a preferred embodiment, the adapter rod 7 includes a vertical rod and a horizontal rod. The top end of the vertical rod 701 is connected to the output shaft of the underwater drive motor 6, and the bottom end of the vertical rod 701 is connected to one end of the horizontal rod 702. The other end of the horizontal rod 702 is fixed to the mesh ring 8. When the underwater drive motor 6 drives the adapter rod 7 to rotate, it causes the mesh ring 8 to rotate around the vertical rod 701, thereby realizing the harvesting of juvenile fish and large plankton.

[0029] The underwater drive motor 6, adapter rod 7, net opening ring 8, conical net 9, and collection bag 10 constitute a collection unit. In some embodiments, there are multiple collection units (two in this embodiment), and the mesh size of the conical net (9) in each collection unit is different. The conical net 9 is made of high-strength, corrosion-resistant netting. The mesh size is selected according to the size of the target organisms to be collected, and it can be used to catch juvenile fish and large plankton. Preferably, a support ring 11 is provided near the net opening ring 8 of the conical net 9. The support ring 11 and the conical net 9 are tied together with silk thread. The support ring 11 is used to open the large end opening of the conical net 9 to ensure that the large end opening of the conical net 9 remains open in the water. The net body gradually narrows into a cone shape to the collection bag 10 at the rear. The collection bag 10 and the cone tip opening (small end opening) of the conical net 9 are detachably connected.

[0030] In this embodiment, a water depth sensor is installed on the underwater support 5, which can provide real-time information on the current water depth for fishing. The water depth sensor can be a pressure-type water depth sensor or an ultrasonic underwater ranging sensor.

[0031] It should be noted that the embodiments described in this utility model are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A single-boat push net system for continuous collection of larvae and juvenile fish and large plankton, comprising a hull (1), characterized in that, The hull (1) is provided with a fishing hole (2), and a fixed bracket (3) is provided at the fishing hole (2). The lifting mechanism (4) is installed on the fixed bracket (3). The lifting part of the lifting mechanism (4) is fixed to the underwater bracket (5). An underwater drive motor (6) is provided on the underwater bracket (5). The output shaft of the underwater drive motor (6) is shaft-connected to the top of the adapter rod (7). The bottom end of the adapter rod (7) is connected to the net mouth ring (8). The cone bottom opening of the cone net (9) is connected to the net mouth ring (8).

2. The single-boat push net system for continuous collection of larvae and large plankton as described in claim 1, characterized in that, The lifting mechanism (4) is a screw jack or a waterproof electric lifting rod.

3. The single-boat push net system for continuous collection of larvae and large plankton as described in claim 1, characterized in that, The adapter rod (7) includes a vertical rod and a horizontal rod. The top end of the vertical rod (701) is connected to the output shaft of the underwater drive motor (6), the bottom end of the vertical rod (701) is connected to one end of the horizontal rod (702), and the other end of the horizontal rod (702) is fixed to the mesh ring (8).

4. The single-boat push net system for continuous collection of larvae and large plankton as described in claim 1, characterized in that, The cone-shaped net (9) is provided with a support ring (11) near the net opening ring (8).

5. The single-boat push net system for continuous collection of larvae and large plankton according to claim 1, characterized in that, A water depth sensor is installed on the underwater support (5).

6. The single-boat push net system for continuous collection of larvae and large plankton according to claim 5, characterized in that, The water depth sensor is either a pressure-type water depth sensor or an ultrasonic underwater ranging sensor.

7. The single-boat push net system for continuous collection of larvae and juvenile fish and large plankton according to claim 1, characterized in that, The cone tip opening of the cone-shaped net (9) is connected to the collection bag (10).

8. The single-boat push net system for continuous collection of larvae and large plankton according to claim 7, characterized in that, The underwater drive motor (6), adapter rod (7), net ring (8), conical net (9), and collection bag (10) constitute a collection unit. There are multiple collection units, and the mesh size of the conical net (9) in each collection unit is different.

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