A low-hazard sampling net apparatus

Abstract

The application belongs to the technical field of fishing sampling, and provides a low-damage sampling net device, which comprises an outer net, an inner net, a connecting buffer body, a front-end fixed frame and a rear-end fixed frame; the inner net is arranged on the inner side of the outer net, and the inner side of the outer net is connected with the inner net through the connecting buffer body; the front end of the outer net is connected with the front-end fixed frame, and the rear end of the outer net is connected with the rear-end fixed frame; through the cooperation design of the double-layer net body of the outer net and the inner net, the net body stress buffering is realized in cooperation with the connecting buffer body, so that the damage of the water organisms caused by the violent shaking of the net body in the sampling process can be avoided; the front-end large screen net allows water flow to pass through while intercepting large-size impurities, and the rear-end small screen net completes the retention and filtration of the target sample.

Description

Technical Field

[0001] This invention belongs to the field of fishery sampling technology, specifically relating to a low-damage sampling net device. Background Technology

[0002] In fisheries resource surveys and aquatic organism research sampling, specialized nets are required to collect fish samples from target waters. Traditional sampling nets are mostly single-net structures, which are prone to violent deformation and shaking during water flow or dragging sampling. The net can directly scrape and impact captured aquatic organisms, easily causing damage or even death to the sample surface. This is not conducive to subsequent live observation and experimental research, nor does it meet the basic requirements of resource conservation. Furthermore, traditional sampling nets lack a tiered filtration system, allowing debris to enter the net during sampling. This not only increases the overall weight of the net but also crushes and damages the target samples, making subsequent sample sorting more difficult. Therefore, there is an urgent need for a sampling net device with a simple structure, excellent buffering effect, and the ability to effectively reduce harm to aquatic organisms during the sampling process. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a low-damage sampling net device to solve the problems in the prior art. The technical solution adopted by this invention is as follows: A low-damage sampling net device includes an outer net, an inner net, a connecting buffer, a front-end fixing frame, and a rear-end fixing frame; The inner network is arranged inside the outer network, and the inner network is connected to the inner network through the connecting buffer; the front end of the outer network is connected to the front fixing frame, and the rear end of the outer network is connected to the rear fixing frame.

[0004] Furthermore, a large front screen can be detachably installed in the hollow part of the front fixing frame, and a small rear screen can be detachably installed in the hollow part of the rear fixing frame; the screen hole diameter of the large front screen is larger than the screen hole diameter of the small rear screen.

[0005] Furthermore, a front-end fixing ring is provided on the inner side of the front-end fixing frame, and a front-end mounting ring is provided on the outer side of the front-end large screen. The front-end fixing ring fits into the front-end mounting ring and is detachably connected. A rear-end fixing ring is provided on the inner side of the rear-end fixing frame, and a rear-end mounting ring is provided on the outer side of the rear-end small screen. The rear-end fixing ring fits into the rear-end mounting ring and is detachably connected.

[0006] Furthermore, the connecting buffer is an elastic sphere, and multiple spheres are arranged around the outer side of the inner mesh.

[0007] Furthermore, the inner diameter of the front fixing frame is larger than the inner diameter of the rear fixing frame, and the outer mesh and the inner mesh have a tapered structure.

[0008] Furthermore, the axes of the front-end fixing frame and the rear-end fixing frame are horizontally arranged, the bottom of the front-end fixing frame and the rear-end fixing frame are fixedly connected to the top of the support rod, and the bottom of the support rod is provided with a fixing claw.

[0009] Furthermore, the structure of the telescopic rod of the support rod.

[0010] Furthermore, the tops of the front-end fixing frame and the rear-end fixing frame are fixedly connected to the suspending body via connecting lines.

[0011] The present invention has the following beneficial effects: The present invention uses a double-layer mesh design with an outer mesh and an inner mesh, and a connecting buffer to achieve force buffering of the mesh, which can avoid the damage to aquatic organisms caused by violent shaking of the mesh during sampling; the large screen at the front end allows water to flow through while intercepting large impurities, and the small screen at the rear end completes the retention and filtration of the target sample. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a schematic diagram of the end face. Detailed Implementation

[0013] The following will be described in conjunction with embodiments of the present invention. Figures 1-2 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0014] like Figures 1-2 The present invention proposes a low-damage sampling net device, including an outer net 1, an inner net 2, a connecting buffer 3, a front-end fixing frame 6 and a rear-end fixing frame 10; The inner network 2 is arranged inside the outer network 1, and the inner network 2 is connected to the outer network 1 through the connecting buffer 3; the front end of the outer network 1 is connected to the front fixing frame 6, and the rear end of the outer network 1 is connected to the rear fixing frame 10.

[0015] In this invention, the outer net 1 serves as the main net, and the inner net 2 serves as the secondary net. Both the outer net 1 and the inner net 2 are made of modified ultra-high molecular weight polyethylene or liquid silicone wire, etc. The screens of the outer net 1 and the inner net 2 are relatively small, which is intended to reduce physical damage to the target organisms. In addition, a gap 2 is reserved between the outer net 1 and the inner net 2 to prevent the net from sticking together and clogging the screen holes, thus ensuring smooth water flow. The connecting buffer body 3 plays a role in buffering and connecting and fixing, and also maintains continuous water flow to ensure the activity of the collected samples.

[0016] Furthermore, a large front screen 7 is detachably installed in the hollow portion of the front fixing frame 6, and a small rear screen 11 is detachably installed in the hollow portion of the rear fixing frame 10; the diameter of the screen holes of the large front screen 7 is larger than the diameter of the screen holes of the small rear screen 11; the large front screen 7 is used to initially filter large-volume debris to prevent excessively large stones, aquatic dead branches, etc. from entering the mesh body and causing blockage or damage to the sample; the small rear screen 11 can retain the target sample in the mesh while ensuring that the water flows out of the mesh body smoothly.

[0017] Furthermore, a front-end fixing ring is provided on the inner side of the front-end fixing frame 6, and a front-end mounting ring is provided on the outer side of the front-end large screen 7. The front-end fixing ring fits into the front-end mounting ring and is detachably connected. A rear-end fixing ring is provided on the inner side of the rear-end fixing frame 10, and a rear-end mounting ring is provided on the outer side of the rear-end small screen 11. The rear-end fixing ring fits into the rear-end mounting ring and is detachably connected. This detachable connection structure allows operators to easily replace the front-end large screen 7 and the rear-end small screen 11 with the corresponding screen hole diameter according to the size of the target sample. It also allows for quick replacement of damaged parts after the screen is damaged, without having to replace the entire screen, thus reducing maintenance costs. The detachable connection can be achieved through bolts, clips, etc.

[0018] Furthermore, the connecting buffer 3 is an elastic sphere, with multiple elastic spheres evenly spaced around the outer side of the inner net 2; when the net is impacted by water flow or bumped by foreign objects... Furthermore, the connecting buffer body 3 is an elastic sphere 3, and multiple spheres 3 are arranged around the outer side of the inner net 2; the elastic sphere 3 can be made of materials such as rubber, and the elastic sphere 3 absorbs the impact energy of water flow and fish movement through its own elastic deformation, maintains the gap between the outer net 1 and the inner net 2, reduces harm to fish, and ensures smooth water flow.

[0019] Furthermore, the inner diameter of the front fixing frame 6 is larger than the inner diameter of the rear fixing frame 10, and the outer mesh 1 and the inner mesh 2 are tapered structures.

[0020] The device has an overall conical structure with a larger opening at the front and a smaller opening at the rear, which conforms to the characteristics of fluid mechanics and can maintain a stable posture under the impact of water flow, reducing the swaying amplitude of the net; both the front fixing frame 6 and the rear fixing frame 10 are hollow structures.

[0021] Furthermore, the axes of the front-end fixing frame 6 and the rear-end fixing frame 10 are set horizontally, and the bottom of the front-end fixing frame 6 and the rear-end fixing frame 10 are fixedly connected to the top of the support rod 8. The bottom of the support rod 8 is provided with a fixing claw 9. The fixing claw 9 can be inserted into the mud and sand at the bottom of the water to fix the entire net device in the sampling area and prevent the net from being washed away and displaced by the water flow during the sampling process.

[0022] Furthermore, the telescopic rod structure of the support rod 8 can be adjusted to adapt to sampling waters of different depths, ensuring that the net as a whole always maintains a preset horizontal working posture.

[0023] Furthermore, the tops of the front-end fixing frame 6 and the rear-end fixing frame 10 are fixedly connected to the suspending body 5 via connecting lines 4; The suspending body 5 can be a foam ball or a plate. It relies on its own buoyancy to offset the weight of the net and frame, so that the net remains suspended and the sampling channel remains unobstructed.

[0024] When in use, the device is fixed at the preset water sampling point by the fixing claw 9. The suspension body 5 pulls the net to suspend it. The water flow carries the sample from the front large screen 7 into the net. Large impurities are blocked by the front large screen, while small and medium-sized target organisms are intercepted by the rear small screen 11 with the water flow. Smaller fish pass through the rear small screen 11.

[0025] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A low-damage sampling net device, characterized in that, It includes an external network (1), an internal network (2), a connection buffer (3), a front-end fixed frame (6), and a back-end fixed frame (10); The inner net (2) is arranged inside the outer net (1), and the inner net (2) is connected to the inner net (2) through the connecting buffer (3); the front end of the outer net (1) is connected to the front fixing frame (6), and the rear end of the outer net (1) is connected to the rear fixing frame (10).

2. The low-harm sampling net device according to claim 1, characterized in that, A large front screen (7) can be detachably installed in the hollow part of the front fixing frame (6), and a small rear screen (11) can be detachably installed in the hollow part of the rear fixing frame (10); the diameter of the screen hole of the large front screen (7) is larger than the diameter of the screen hole of the small rear screen (11).

3. The low-harm sampling net device according to claim 2, characterized in that, The front fixing frame (6) is provided with a front fixing ring on the inner side, and the front large screen (7) is provided with a front mounting ring on the outer side. The front fixing ring fits the front mounting ring and is detachably connected. The rear fixing frame (10) is provided with a rear fixing ring on its inner side, and the rear small screen (11) is provided with a rear mounting ring on its outer side. The rear fixing ring fits into the rear mounting ring and is detachably connected.

4. The low-harm sampling net device according to claim 1, characterized in that, The connecting buffer (3) is an elastic sphere (3), and multiple spheres (3) are arranged around the outside of the inner net (2).

5. A low-harm sampling net device according to claim 1, characterized in that, The inner diameter of the front fixing frame (6) is larger than the inner diameter of the rear fixing frame (10), and the outer mesh (1) and the inner mesh (2) are tapered structures.

6. The low-harm sampling net device according to claim 1, characterized in that, The axes of the front fixing frame (6) and the rear fixing frame (10) are set horizontally. The bottom of the front fixing frame (6) and the rear fixing frame (10) are fixedly connected to the top of the support rod (8). The bottom of the support rod (8) is provided with a fixing claw (9).

7. A low-damage sampling net device according to claim 6, characterized in that, The structure of the telescopic rod of the support rod (8).

8. A low-harm sampling net device according to claim 1, characterized in that, The top of the front fixing frame (6) and the rear fixing frame (10) are fixedly connected to the suspending body (5) by the connecting line (4).

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