Technology makes production safer.
Why is it necessary to conduct non-destructive testing of steel wire rope corrosion wear?
Release time:
2020-09-08
The wire rope nondestructive tester of Luoyang Baikete Company is an instrument used for non-destructive and on-site detection of wire ropes. It can quantitatively detect the metal cross-sectional area loss (LMA) of wire ropes and the local damage (LF) of wire ropes.
We all know that the safety of mine wire rope lifting is related to the safety of the entire lifting system and the entire coal mine. The state has continuously issued safety documents emphasizing that the person in charge of the mine should scientifically manage the mine and use effective detection methods and maintenance plans to maintain the wire rope.
Article 408 of the national "coal safety regulations" stipulates that when the steel wire of the steel wire rope has damage such as blackening, rust skin, pitting pits, etc., it shall not be used as a lifting personnel. When the steel wire rope is seriously rusted, or pitting pits form grooves, or the outer steel wire is loose, no matter how many broken wires or whether the rope diameter changes, it must be replaced immediately. This regulation is based on manual testing, and now with the development of the market, mining customers are more willing to use equipment to make the test data more scientific, to provide a more favorable guarantee for the good operation of the equipment.
The national standard GB/T 21837 "ferromagnetic wire rope electromagnetic testing method" stipulates that the wire rope nondestructive testing has two main detection parameters: LMA, LF
LMA (metal cross-sectional area loss): focuses on the defect degree of the metal area in the wire rope, and outputs a comparative value by comparing the detection position with the reference position (I. e. the position of the larger metal cross-sectional area in the wire rope), which is a relative measurement value, in%. The larger the value, the more serious the metal defect.
LF (local damage): focus on the discontinuity in the wire rope, such as broken wire, serious corrosion pits, etc. At the damage position, a leakage magnetic field is formed, and a voltage signal is output, unit mv. The size of the value is related to the length of the fracture and the degree of damage.
The wire rope nondestructive detector of Luoyang Baikete Company is an instrument used for non-destructive and on-site detection of wire ropes. It can quantitatively detect the metal cross-sectional area loss (LMA) of wire ropes and the local damage (LF) of wire ropes. It is used in mine hoists, cranes, elevators, elevators, aerial ropeways, bridges and other fields.
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