Fishing net strength testing device

Abstract

The invention provides a fishing net strength testing device, and relates to the technical field of fishing net detection, the fishing net strength testing device comprises a rod, the rod is provided with a plurality of chutes surrounding the axis array of the rod, and the chutes are provided with end parts and strip-shaped openings; the device further comprises conical blocks corresponding to the sliding grooves, the conical blocks are inserted into the sliding grooves and extend outwards from the strip-shaped openings, and slopes are arranged on the outwards-extending parts and used for making contact with line structures forming meshes. The invention provides two test modes, the first mode is suitable for dynamic performance analysis in a research and development stage, response characteristics of a fishing net material under a complex working condition are captured through a flexible adjusting system, the second mode is specially designed for production quality inspection, and the test efficiency is improved. Standardized batch detection can be achieved through the rigid structure and the modular assembly, the full-chain testing requirement from laboratory research to industrial production can be met through complementation of the two technical routes, and a complete solution is provided for mechanical property evaluation of fishing net materials.

Description

Technical Field

[0001] The present invention relates to the technical field of fishing net detection, and particularly to a device for testing the strength of fishing nets. Background Art

[0002] As a core link in the performance evaluation of fishery equipment, the technical development of fishing net strength detection is significantly out of touch with the needs of modern fishery. There are three key technical defects in the current commonly used detection methods in the industry: First, the detection object is limited to the overall tensile strength test of fishing nets, ignoring the mechanical property evaluation of the mesh structure, which is the weakest link of fishing nets; Second, the existing detection equipment generally adopts a planar tensile test mode and cannot simulate the three-dimensional dynamic load distribution during the actual impact of fish; Third, there are significant differences between the test conditions and the real working environment, lacking the adaptive simulation of the diverse biological characteristics of fish. This technical limitation directly leads to a systematic deviation between the fishing net strength detection results and the damage conditions in the real usage scenario. Summary of the Invention

[0003] The purpose of the present invention is to provide a device for testing the strength of fishing nets to solve the above technical problems.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A device for testing the strength of fishing nets includes a rod. The rod has a plurality of chutes arrayed around its axis. Each chute has an end and a strip-shaped opening. The device also includes a cone corresponding to each chute. The cone is inserted into the chute and extends outwards through the strip-shaped opening. The extended part has a slope for contacting the wire structure forming the mesh.

[0006] The device further includes a rod base fixed to the rod and a connecting structure. The connecting structure connects the cone to the rod base, enabling a plurality of cones to simulate the shapes corresponding to different fish shapes at the rod.

[0007] Preferably, the connecting member is a soft rod. One end of the soft rod is connected to the cone, and the other end of the soft rod penetrates through the rod base and extends outwards from the rod base. The device also includes a screw that is screwed into the channel of the soft rod penetrating the rod base from the side position of the rod base and can selectively squeeze or not squeeze the soft rod.

[0008] Preferably, there is a spring at the end of the chute. The spring contacts the part of the cone located in the chute. There is also a sensor at the end of the chute for measuring the pressure value when the spring is squeezed.

[0009] Preferably, the connecting member is a hard rod. One end of the hard rod is connected to the cone, and the other end of the hard rod is fixed in the rod base.

[0010] Preferably, after the end of the hard rod connected to the rod base is fixed, the cone corresponding to the hard rod is immovable relative to the chute.

[0011] Preferably, the part of the connecting piece connected to the conical block is a hook, and the structure adapted to the hook is a hook groove provided at the tail of the conical block, and the hook is inserted into the hook groove.

[0012] Preferably, all the conical blocks can form a conical-like body relative to the rod base. The head of the conical-like body can be inserted into the mesh hole, and the tail of the conical-like body needs to trap the wire structure forming the mesh hole.

[0013] Preferably, the rod includes a first rod and a second rod that is an extended part of the first rod, and the sliding groove is provided at the second rod.

[0014] Preferably, the part of the conical block located in the sliding groove is a slider that is slidably engaged with the sliding groove and restricts the conical block to slide in the arrangement direction of the sliding groove.

[0015] The beneficial effects of the present invention are as follows:

[0016] The present invention provides two testing modes. The first mode is applicable to the dynamic performance analysis in the R & D stage. The flexible adjustment system is used to capture the response characteristics of the fishing net material under complex working conditions. The second mode is designed specifically for production quality inspection. Its rigid structure and modular components can achieve standardized batch detection. Through the complementarity of the two technical routes, the full-chain testing requirements from laboratory research to industrial production can be covered, providing a complete solution for the mechanical property evaluation of fishing net materials. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the fishing net strength testing device in Embodiment 1;

[0018] Figure 2 It is Figure 1 a cross-sectional view of the device shown;

[0019] Figure 3 It is Figure 2 an enlarged view of A in;

[0020] Figure 4 It is Figure 2 an enlarged view of B in;

[0021] Figure 5 It is Figure 1 a second state diagram of the device shown;

[0022] Figure 6 It is Figure 1 a third state diagram of the device shown;

[0023] Figure 7 It is a schematic structural diagram of the fishing net strength testing device in Embodiment 2;

[0024] Reference Numerals: 1, first rod; 2, second rod; 3, tapered block; 4, rod base; 5, sensor; 6, chute; 7, hook groove; 8, hook; 9, flexible rod; 10, screw; 11, slider; 12, spring; 13, rigid rod. Detailed Implementation Manner

[0025] For ease of understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] The specific embodiments of the present invention will be described below with reference to the drawings.

[0028] Embodiment 1

[0029] In this embodiment, a fishing net strength testing device is proposed. Please refer to Figures 1-6 , the fishing net strength testing device consists of a rod structure, an adjustment mechanism, and a detection system, which form the core test framework. The main rod includes the first rod 1 and the second rod 2 extending axially therefrom. Twelve chutes 6 are evenly distributed along the circumferential direction on the surface of the second rod 2. Each chute 6 has a limiting end and is provided with a strip-shaped opening penetrating the rod wall. A tapered block 3 is assembled in the chute 6. The slider 11 at the lateral position of the tapered block 3 is in sliding fit with the chute 6. The tapered block 3 extends out through the strip-shaped opening to form an inclined contact slope. The design of this slope surface is used to accurately simulate the mechanical action of the fish body contour on the fishing net mesh. Please refer to Figure 4 , the rod base 4 is fixed at the end of the second rod 2. Twelve flexible connection components are radially distributed. Each component consists of a flexible rod 9, a hook 8, and an adjustment mechanism. A standard hook groove 7 is machined at the tail of the tapered block 3. The 304 stainless steel hook 8 that cooperates with it is connected to the front end of the flexible rod 9 by a hanging buckle method. The flexible rod 9 adopts a structure of polyurethane-coated steel wire rope. Its rear end passes through the channel provided in the rod base 4 and extends outwards. The side wall of the rod base 4 is tapped with an M6 threaded hole and a screw 10 is assembled. This design implements frictional braking on the flexible rod 9 by tightening the screw 10 to adjust the position of the corresponding tapered block 3 on the second rod 2, thereby simulating the shape of the fish, such as Figure 5 and Figure 6 the styles shown. Please refer to Figure 4, at the bottom of the sliding groove 6 there is a spring 12, and a sensor 5 (the sensor 5 is preferably a pressure sensor) is also installed in cooperation at the bottom of the sliding groove 6. This sensor 5 can monitor the dynamic force on the cone block 3 in real time during the test.

[0030] During the test, the operator can, according to the body shape characteristics of bream or silver carp and bighead carp, change the spatial position of each cone block 3 by adjusting the screw 10, and cooperate with the elastic reset function of the spring 12 to make multiple cone blocks 3 combine to form Figure 5 the standard test shape shown. In the black carp test mode, by differentially adjusting the extended length of each soft rod 9, a streamlined test profile as shown in Figure 6 can be reconstructed. At this time, the pressure sensor 5 will record the peak contact pressure at different positions, providing multi-dimensional mechanical parameters for the evaluation of the anti-tearing performance of the fishing net material.

[0031] Embodiment 2

[0032] In this embodiment, a fishing net strength test device is proposed. Please refer to Figure 7 . The fishing net strength test device consists of a rod structure, an adjustment mechanism, and a detection system, which form the core test framework. The main rod includes a first rod 1 and a second rod 2 extending axially therefrom. Twelve sliding grooves 6 are evenly distributed along the circumferential direction on the surface of the second rod 2. Each sliding groove 6 has a limiting end and a strip-shaped opening penetrating the rod wall. A cone block 3 is assembled in the sliding groove 6. The slider 11 at the lateral position of the cone block 3 is in sliding fit with the sliding groove 6. The cone block 3 extends out through the strip-shaped opening to form an inclined contact slope. The design of this slope surface is used to accurately simulate the mechanical action of the fish body contour on the fishing net mesh. This embodiment is different from Embodiment 1. Specifically, please refer to Figure 7 . The rod base 4 is fixed at the end of the second rod 2. Twelve rigid connection components are radially distributed. Each component consists of a rigid rod 13 and a hook 8. Consistent with Embodiment 1, a standard hook groove 7 is processed at the tail of the cone block 3. The 304 stainless steel hook 8 that cooperates with it is connected to the front end of the soft rod 9 by a hanging buckle method. The difference is that the connecting piece is replaced by a rigid rod 13. Further explanation, in this embodiment, Figure 7 After the shape shown is determined, the corresponding rigid rod 13 can be selected for support connection. In this way, when parameters and other data do not need to be specified, an impact test can be carried out on the mesh, and then the structural strength of the mesh can be clarified, which is especially suitable for standardized operations during batch detection.

[0033] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered to be within the scope described in this specification.

[0034] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. Fishing net strength testing device, characterized by: The rod comprises a plurality of slide grooves arranged in an array around the axis of the rod, the slide grooves have ends, and the slide grooves also have strip-shaped openings; It also includes a cone block corresponding to the slide groove, which is inserted into the slide groove and extends outward from the strip-shaped opening. The outwardly extending part has a slope, and the slope is used to contact the wire structure that constitutes the mesh; it also includes a rod seat fixed at the rod and a connecting structure. The connecting structure connects the cone block to the rod seat, so that multiple cone blocks can simulate corresponding fish shapes at the rod.

2. The fishing net strength testing device according to claim 1, characterized in that: The connecting piece is a soft rod, one end of which is connected to the cone block, and the other end of the soft rod passes through the rod seat and extends outward from the rod seat. It also includes a screw, which is screwed into the channel of the soft rod passing through the rod seat from the lateral position of the rod seat and can selectively squeeze or not squeeze the soft rod.

3. The fishing net strength testing device according to claim 2, characterized in that: A spring is arranged at the end of the slide groove, and the spring contacts the part of the cone block located in the slide groove. There is also a sensor at the end of the slide groove, and the sensor is used to measure the pressure value when the spring is squeezed.

4. The fishing net strength testing device according to claim 1, characterized in that: The connecting piece is a hard rod, one end of which is connected to the cone block, and the other end of which is fixed in a rod seat.

5. The fishing net strength testing device according to claim 4, characterized in that: After one end of the hard rod connected to the rod seat is fixed, the cone block corresponding to the hard rod cannot move relative to the sliding groove.

6. The fishing net strength testing device according to claim 2 or 4, characterized in that: The part of the connecting piece connected to the cone block is a hook, and the structure adapted to the hook is a hook groove arranged at the tail of the cone block, and the hook is inserted into the hook groove.

7. The fishing net strength testing device according to claim 1, characterized in that: All the cone blocks can form a pyramid-like body relative to the rod seat, the head of the pyramid-like body can be inserted into the mesh, and the tail of the pyramid-like body needs to trap the wire structure constituting the mesh.

8. The fishing net strength testing device according to claim 1, characterized in that: The rod comprises a first rod and a second rod as an extension of the first rod, and the slide groove is arranged at the second rod.

9. The fishing net strength testing device according to claim 1, characterized in that: The part of the cone block located in the slide groove is a sliding block that is slidably matched with the slide groove and constrains the cone block to slide in the arrangement direction of the slide groove.

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