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Twisted netted piece single-wire strong testing method

A test method and mesh technology, applied in the direction of measuring devices, strength characteristics, instruments, etc., can solve problems such as inability to carry out, and achieve reasonable and reliable technical indicators.

Inactive Publication Date: 2009-05-27
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the mesh breaking strength and mesh breaking strength of the knot-free twisted mesh are tested according to the regulations in GB / T4925, it is impossible to carry out due to the slippage of the mesh connection point.

Method used

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  • Twisted netted piece single-wire strong testing method
  • Twisted netted piece single-wire strong testing method
  • Twisted netted piece single-wire strong testing method

Examples

Experimental program
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Embodiment approach

[0011] The sample is taken from each part of the mesh at a distance of more than 5 mesh from the edge of the mesh; when the same project is tested, the samples are not taken continuously in the same direction of the two mesh feet; all the mesh feet are cut along the oblique direction of the mesh to obtain a The single network cable of the foot is used as a sample for the single-wire strength test of the mesh, and the effective length of the sample between the fixtures is 500mm±1mm (see figure 1 ). The appearance inspection of the sample is carried out at normal temperature and humidity. During the test of the single-wire strength performance of the mesh, the laboratory temperature is (20±2)°C and the relative humidity is (65±5)%. The dry sample is balanced in the laboratory for more than 6 hours ; The wet sample is placed in water with a water temperature of 20°C ± 2°C and soaked for more than 6 hours to reach a fully infiltrated state. After taking it out, hang it until the s...

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Abstract

A method for testing strength of single thread for twisted fishing net includes shearing said net to obtain single thread with cross thread- foot, fixing said thread in champing tool of strength tester, adjusting movable speed of clamping tool on strength tester according to value as thread average breaking time of 20s minus or plus 3s when tensile test is carried out on strength tester, using maximum load value of break as strength of single thread on twisted fishing net.

Description

Technical field: [0001] The invention relates to a method for testing the physical properties of fishing nets. Background technique [0002] Netting is one of the important materials in fishery production. Whether it is a variety of nets for marine fishing or freshwater fishing, or cages for sea and freshwater aquaculture, lakes, and fences in reservoirs, mesh sheets are required. The structural type of the mesh can be divided into two types: knotted and knotless. In the knotted mesh, it is divided into slipknot, dead knot, and double dead knot mesh; in the knotless mesh, it is divided into warp knitting, twisting, plain weaving, and twisting mesh. In addition to the knotless twisted mesh, the above-mentioned various knotted and knotless meshes have been widely used in fishing and breeding in my country's fishery production, and the knotless twisted mesh is a newly adopted mesh. Compared with the knotless warp-knitted mesh, the knotless twisted mesh has the advantages of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/00
Inventor 石建高王鲁民
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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