Wire rope load performance undamaged evaluating method

A wire rope and load technology, which is applied in the field of nondestructive evaluation of wire rope load performance, can solve the problems of fuzzy measurement of damage degree, appeasement of catastrophic threats, and impossible to effectively characterize the overall performance of wire rope components.

Active Publication Date: 2009-08-19
LUO YANG WIRE ROPE INSPECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the steel wire rope member is in a strong magnetized H field, each layer of material (steel wire) has a phenomenon of "leaking" a large amount of magnetic field lines to the interlayer air gap (air gap), and the outermost layer "leaks" directly to the air space "Magnetic force lines form a "structural leakage magnetic field". Since the shape of the steel wire rope is undulating and multi-surface magnetic leakage, it is obvious that the "structural leakage magnetic field" is complex and complex, which constitutes a complex "noise band" for detection.
Secondly, the magnetic permeability of the material is extremely low in the state of magnetic saturation and supersaturation (see image 3 ), which means that it is difficult or even impossible to "transmit" the magnetic field change information of the inner layer material of the steel wire rope, and the "leakage magnetic field" required for detection can only rely on the "critical effect" and "Magnetic flux skin effect"
Third, the sensor used is a one-way (receiving) magnetoelectric conversion working mode; there is no reliable working information carrier between the passive working sensor and the wire rope, and it can only wait for the generation and change of the external magnetic field, which belongs to the "magnetic field external placement type". "
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Method used

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  • Wire rope load performance undamaged evaluating method
  • Wire rope load performance undamaged evaluating method
  • Wire rope load performance undamaged evaluating method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Utilizing the physical characteristics of the steel wire rope member load material, a relatively low magnetic field intensity H makes the steel wire rope member have a continuous and uniform small magnetic energy product (BH). The magnetic energy potential difference information discrimination technology (device) is used for real-time identification and extraction of the physical field change information of the load material that is equivalent to the single value equivalent of the mechanical performance degradation of the steel wire rope member such as bending, torsion, and tension. According to the mechanical calibration principle of the tensile load (breaking force) of steel wire rope components, an equivalent parameter is set up to represent the corresponding load performance change of steel wire rope components, and the state detection of each link of the steel wire rope component application cycle is completed in a non-destructive manner. Create a scientific evaluat...

Embodiment 2

[0044] Utilizing the physical characteristics of the steel wire rope member load material, a relatively low magnetic field intensity H makes the steel wire rope member have a continuous and uniform small magnetic energy product (BH). Its characteristics are: the load material of the steel wire rope member is medium-high carbon steel or alloy steel, which has typical ferromagnetic properties. This physical characteristic can be used as "magnetic characteristic curve of iron and steel material" such as image 3 As shown, the B-H line is at H 0 ~H μm The rate of change in the interval is the highest, and the magnetic permeability of the material increases rapidly and reaches the maximum value, indicating that the magnetic properties (magnetic induction) of the material in this H interval are the most sensitive. Due to the hysteresis characteristics of ferromagnetic materials, any volume element dV of the steel wire rope component load material passing through the H field will ac...

Embodiment 3

[0046] The physical field change information of the load material related to the single-value equivalent of the mechanical performance degradation of the steel wire rope member such as bending, torsion, and tension; it is characterized in that due to the ferromagnetic properties of the steel wire rope member load material, the member that is continuously applied with a magnetic load All ferromagnetic metal materials participating in the load work have an appropriate amount of low energy level (×1mT level) small magnetic energy product (BH), and if any volume element dV of the load material along its axial direction in the component is continuous, uniform and consistent , then the small magnetic energy product in any volume element dV is equal and evenly distributed, and the magnetic permeability μ of the adjacent volume element dV material is continuous and consistent, that is: the axial magnetic field established along the ferromagnetic material of the component The magnetic l...

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Abstract

The invention discloses a wire rope loading performance nondestructive evaluation method which comprises the following steps of: utilizing the physical properties of wire rope component loading material and relatively low magnetic field intensity H to lead a wire rope component to have continuous and even small magnetic energy product; and identifying and extracting physical field change information of the loading material equivalently relevant to the mechanical property degradation single values such as bending, twisting and pulling resistance, and the like of the wire rope component by applying magnetic energy potential difference information analysis equipment in real time. The wire rope loading performance nondestructive evaluation technology realizes the tentative plan of comprehensive monitoring and real-time evaluation from the manufacturing completion of the wire rope component to the end of the security use value thereof, and provides an effective and feasible technical measure and a safety management technique mode for preventing man-made disasters and saving material resources, thus having very positive social benefit and extremely practical economic benefit.

Description

technical field [0001] The invention relates to an evaluation method, in particular to a non-destructive evaluation method for the load performance of a steel wire rope. Background technique [0002] Wire rope is a ferromagnetic metal component serving a special form of use. With the progress and development of human society, steel wire ropes are more widely used and endowed with more important missions. Therefore, the product quality and application reliability of steel wire ropes are highly concerned by the whole world, especially the major industrial countries. For more than a century, the application research of steel wire rope in various countries has been devoted to two aspects: 1. To improve product structure design and manufacturing quality level, such as researching new structure, optimizing steel material, improving production technology level, etc. "; Second, improve the safety management technology level of product application, such as performance testing, rati...

Claims

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Application Information

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IPC IPC(8): G01N27/72
CPCG01N27/22G01N27/82
Inventor 窦毓棠杨旭窦伯英窦柏林
Owner LUO YANG WIRE ROPE INSPECTION TECH CO LTD
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