Method for testing breaking strength of mesh joints in lay type net patch
A technology of breaking strength and test method, which is applied in the field of physical index detection of fishing nets, and can solve problems such as inability to carry out
Inactive Publication Date: 2006-09-27
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
View PDF0 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The test method for testing the mesh breaking strength of knotted nets and knotless warp-knitted nets is stipulated in the national standard GB / T4925-1985 "Test Method for Breaking Strength and Elongation at Break of Synthetic Fiber Fishing Nets". It is to cut a certain length of mesh wire on the mesh, and clamp it on the strength testing machine of constant speed stretching or equal length stretching to measure, but according to the provisions in GB / T4925 to detect the mesh breaking strength of the knot-free twisted mesh and the breaking strength of the mesh, both of which cannot be carried out due to the slippage of the mesh connection point
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0011] The technical scheme of the present invention comprises intercepting sample, sample processing and strength test, and sample is intercepted at the position more than 5 meshes away from twisted mesh edge, and sample is with mesh (see figure 1 ) with a connection point 1 as the center, according to the direction of the connection point network cable, cut a certain length of network cable up and down, the length is greater than the effective length of the network cable between the fixtures 100mm±1mm (see figure 2 ); if the mesh size is greater than 150mm, it can ensure that the upper and lower mesh feet of the connection point of the mesh under test are clamped by the upper and lower fixtures of the strength testing machine ( figure 2 2 and 3) of the connection point can be clamped, and the upper and lower two mesh feet of the connection point can be cut off to directly obtain the sample for the fracture strength test of the connection point (see image 3 Left picture); ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
This invention relates to a method for testing breaking strength of mesh joints in lay type net patch. For the physical index test to joint-free fishing mesh, it is characteristic in: away the edge more than five meshes, intercepting the sample with one joint point as center; according to the direction of the joint point line, intercepting lines up and down with some length more than the effective line length within clamp 100mm+-1mm; paralleling the sample two mesh feet tightly but not overlap; holding the sample on strength tester by a plane clamp with effective widen more than 50mm for the test at 20+-2Deg and 63~67% relative humidity; after 20s+-3s as the average breaking time, determining the strength.
Description
technical field [0001] The invention relates to a method for detecting the mesh physical index of a fishing net. 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 o...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01N3/08G01N3/04
Inventor 汤振明石建高柴秀芳马海有
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI