A fish net structure with adjustable mesh size and anti-winding function
By using a sliding node assembly of alternating high-strength nylon rope and elastic rope to adjust the mesh size in the fishing net, and by setting up an anti-tangling device with flexible silicone rings and buoyancy balls at the edge of the fishing net, the problems of mesh fixation and tangling in traditional fishing nets are solved, thereby improving fishing efficiency and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING AGRICULTURAL UNIVERSITY
- Filing Date
- 2025-03-11
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional fishing nets have a fixed mesh size, making it difficult to adapt to the different fish species being caught. They are also prone to tangling, resulting in low fishing efficiency and high net wear.
The net uses alternating high-strength nylon rope and high-elasticity rope, and the mesh size can be adjusted by sliding node components. Flexible silicone rings and buoyancy balls are installed at the edge of the fishing net to prevent tangling.
It enables rapid adjustment of the mesh size of fishing nets, improves fishing efficiency, extends the service life of fishing nets, reduces resource waste, and adapts to various fishing scenarios.
Smart Images

Figure CN224440138U_ABST
Abstract
Description
Technical Field
[0001] This utility model designs a fishing net structure with adjustable mesh size and anti-tangling function, belonging to the field of agricultural design. Background Technology
[0002] Traditional fishing nets typically have a fixed mesh size, making them inflexible and unsuitable for catching different types of fish. Furthermore, in actual use, the nets are prone to tangling due to water currents or the struggles of fish, reducing fishing efficiency and increasing net wear. While some adjustable mesh designs exist, their complex structures and inadequate anti-tangling effects fail to meet the needs of diverse fishing scenarios. Consequently, fishing efficiency and net lifespan in fisheries have not been effectively improved. The structural and technological limitations of traditional fishing nets result in high economic and physical costs for fisheries operations. To improve fisheries production efficiency and reduce resource waste, a simpler, more efficient, flexible fishing net design with better anti-tangling properties is urgently needed to meet the diverse needs of modern fisheries.
[0003] To address the aforementioned problems, this utility model proposes a fishing net structure that can quickly adjust the mesh size and has an anti-tangling function, aiming to overcome the shortcomings of the existing technology, improve fishing efficiency, extend the service life of the fishing net, and adapt to the needs of various fishing scenarios. Utility Model Content
[0004] This invention provides a fishing net structure with adjustable mesh size and anti-tangling function to address the diversity and complexity of fishing environments, aiming to further improve fishing efficiency and reduce costs.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An adjustable mesh size fishing net structure with anti-tangling function includes longitudinal main ropes and transverse connecting ropes, which are arranged alternately to form the basic framework of the mesh. The longitudinal main ropes are woven from high-strength nylon rope, possessing high tensile strength and abrasion resistance. The transverse connecting ropes are made of highly elastic ropes, ensuring the net has a certain degree of tensile strength and toughness, adapting to the complex environment of fishing operations. Suitable for long-term use, the longitudinal main ropes and transverse connecting ropes are connected by sliding node components.
[0007] Furthermore, the sliding assembly is located at the intersection of the longitudinal main rope and the transverse connecting rope. Each node assembly consists of a plastic buckle and an elastic locking device. The sliding node can slide along the main rope, changing the size of the mesh and thus adjusting the mesh size. The buckle is designed as a cable movable cavity structure, and the elastic locking device locks the node position through small protrusions or spring structures on both sides of the buckle, ensuring that the mesh remains stable after adjustment.
[0008] Furthermore, the sliding node assembly is fixedly connected to the adjusting rope, which runs through all the sliding nodes and connects both sides of the fishing net. The adjusting rope is operated via a handle, allowing the user to change the distance between the sliding nodes by pulling the rope, thereby adjusting the mesh size. The rope design is simple, easy to operate, and can quickly adapt to the fishing needs of different fish species.
[0009] Furthermore, the anti-tangling device is located at the edge of the fishing net. The anti-tangling device includes a flexible silicone ring with a buoyancy ball embedded within it. The design of the silicone ring reduces tangling caused by water flow or fish struggling during use. The buoyancy ball ensures that the silicone ring has buoyancy in the water, further reducing tangling caused by water flow.
[0010] In a preferred embodiment, the longitudinal main rope (1) is made of high-density polyethylene with a diameter of 4-6 mm; the transverse connecting rope (2) is made of high molecular weight polyethylene with a diameter of 3-5 mm. The sliding node components (3) are distributed along the longitudinal main rope (1) at intervals of 20-30 cm, and each sliding node component (3) can withstand a maximum load of 50 kg. The longitudinal main rope (1) and the transverse connecting rope (2) form a quadrilateral grid array with variable mesh size through the sliding node components (3), with a mesh size adjustment range of 5-20 cm and an adjustment accuracy of ±1 cm. Further, the plastic buckle (31) in the sliding node component (3) is made of engineering plastic, and its inner cavity is provided with anti-slip texture; the elastic locking piece (32) is made of shape memory alloy; the adjusting pull rope (33) axially passes through the buckle body. The adjusting pull rope (33) is woven from aramid fiber, with a diameter of 2-3 mm, a tensile strength ≥2000 MPa, and a wear-resistant coating on the surface. Furthermore, the anti-winding device (4) includes a closed-loop structure formed by alternating adjacent silicone rings (41); the outer diameter of the silicone ring (41) is 8-10 cm, the inner diameter is 5-7 cm, and the Shore hardness is 50-60A; the buoyancy ball (42) is made of hollow glass microsphere composite material, and its surface is coated with a hydrophobic nano-coating with a density of 0.6-0.8 g / cm³. 3 .
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] 1. This utility model, through its sliding node component and adjustable pull rope, enables rapid adjustment of the mesh size to meet the catching needs of fish of different sizes, thereby improving catching efficiency. This design not only ensures greater adaptability of the fishing net during the catching process but also reduces unnecessary resource waste.
[0013] 2. This practical anti-tangling device, through the design of flexible silicone rings and buoyancy balls, effectively reduces tangling of fishing nets caused by water flow or fish struggling during use, thereby reducing net wear and extending its service life. The stable buoyancy of the buoyancy balls also helps the net maintain a certain tension, avoiding the loosening or tangling problems that are common in traditional fishing nets.
[0014] 3. The design of the adjustable pull rope in this invention simplifies the adjustment of the fishing net's mesh size, allowing operators to easily adjust the mesh size without the need for complex machinery or excessive manual labor. This not only saves operating time but also effectively reduces production costs.
[0015] 4. The fishing net structure proposed in this utility model can be widely used in various fishing scenarios, including nearshore fishing, deep-sea fishing, and the protection of various fishery resources. Its flexible mesh adjustment function and anti-tangling design enable it to adapt to the needs of different aquatic environments and fishing targets, giving it strong market competitiveness. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the mesh structure;
[0018] Figure 3 This is a schematic diagram of the internal structure of the sliding node component;
[0019] Figure 4 Schematic diagram of anti-tangling device;
[0020] In the diagram: 1. Longitudinal main rope, 2. Transverse connecting rope, 3. Sliding node assembly, 4. Anti-tangling device, 31. Plastic buckle, 32. Elastic locking device, 33. Adjustable pull rope, 41. Silicone ring, 42. Buoyancy ball. Detailed Implementation
[0021] 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 a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0022] See Figure 1 An adjustable mesh size fishing net structure with anti-tangling function includes a longitudinal main rope (1) and a transverse connecting rope (2), which are arranged alternately to form the basic framework of the mesh. Further anti-tangling devices (4) are evenly distributed along the edge of the fishing net.
[0023] See Figure 2 To adjust the mesh size, the sliding node assembly (3) is located at the intersection of the longitudinal main rope (1) and the transverse connecting rope (2). The longitudinal main rope (1) is woven from high-strength nylon rope, which has strong tensile strength and abrasion resistance. The transverse connecting rope (2) is made of rope with high elasticity, ensuring that the net has a certain degree of tensile strength and toughness to adapt to the complex environment in fishing operations.
[0024] See Figure 3 The sliding node assembly (3) includes an internal plastic buckle (31) and an elastic locking device (32). The sliding node assembly (3) slides on the longitudinal main rope (1). In order to control the movement of the sliding node assembly (3), the sliding node assembly (3) is pierced by an adjusting pull rope (33).
[0025] See Figure 4 The anti-tangling device (4) includes a flexible silicone ring (41) with a buoyancy ball (42) embedded inside. The design of the silicone ring (41) can reduce the tangling of the net due to water flow or fish struggling during use. The buoyancy ball (42) can ensure that the silicone ring has a certain buoyancy in the water, further reducing the tangling of the fishing net due to water flow.
[0026] The working principle of the fishing net structure with adjustable mesh size and anti-tangling function is as follows:
[0027] In use, pulling the adjusting rope (33) controls the sliding node assembly (3) to slide on the longitudinal main rope (1). The buckle (31) in the sliding assembly (3) is designed as a cable movable cavity structure through which the longitudinal main rope passes. The elastic locking device (32) locks the node position through the small protrusions or spring structure on both sides of the buckle (31), ensuring that the mesh remains stable after adjustment. The anti-tangling device (4) distributed along the edge of the fishing net includes a silicone ring (41). The design of the silicone ring reduces the tangling phenomenon caused by water flow or fish struggling during use. The silicone ring (41) contains a buoyancy ball (42), which ensures that the silicone ring has a certain buoyancy in the water, further reducing the tangling phenomenon caused by water flow.
[0028] 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 fishing net structure having a mesh size adjustment function and an anti-entanglement function, characterized by include: The main net frame is formed by orthogonally weaving longitudinal main ropes (1) and transverse connecting ropes (2). The longitudinal main ropes (1) are made of high-density polyethylene with a diameter of 4-6 mm, and the transverse connecting ropes (2) are made of high molecular weight polyethylene with a diameter of 3-5 mm. Sliding node components (3) are sleeved on the longitudinal main ropes (1) and pass through the transverse connecting ropes (2) to form a sliding connection structure. The sliding node components (3) are distributed along the longitudinal main ropes (1) at intervals of 20-30 cm. Each sliding node component (3) can withstand a maximum load of 50 kg. The adjustment control system includes an adjustment pull rope (33) that passes through all sliding node components (3). The anti-winding device (4) is evenly distributed along the circumference of the main net and includes a flexible silicone ring (41) and its embedded buoyancy ball (42).
2. A fishing net construction according to claim 1, characterised in that: The longitudinal main rope (1) and the transverse connecting rope (2) form a quadrilateral grid array with variable mesh size through the sliding node assembly (3). The mesh size adjustment range is 5-20cm, and the adjustment accuracy is ±1cm.
3. The net structure of claim 1, wherein: The sliding node assembly (3) includes: a plastic buckle (31) made of engineering plastic with anti-slip texture in its inner cavity; an elastic locking piece (32) symmetrically arranged on the inner wall of the buckle and forming a frictional fit with the longitudinal main rope (1), the elastic locking piece (32) being made of shape memory alloy material; and an adjusting pull rope (33) axially penetrating the buckle body.
4. The net structure of claim 1, wherein: The adjusting rope (33) is made of aramid fiber, with a diameter of 2-3 mm, a tensile strength of ≥2000 MPa, and a wear-resistant coating on the surface.
5. The net structure of claim 1, wherein: The anti-winding device (4) comprises: adjacent silica gel rings (41) are alternately connected to form a closed loop structure; the outer diameter of the silica gel ring (41) is 8-10 cm, the inner diameter is 5-7 cm, and the Shore hardness is 50-60A; the buoyancy ball (42) is made of hollow glass microsphere composite material, the surface is provided with a hydrophobic nano coating, and the density is 0.6-0.8 g / cm 3 .