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Electromagnetic nondestructive testing method and device for elevator steel belt

A non-destructive testing, steel strip technology, applied in the direction of material magnetic variables, etc., can solve the problems affecting the safety of elevator use, easy to scratch the surface of rubber materials, etc., to achieve the effect of convenient sensor layout and wiring, high detection accuracy, and precise positioning detection

Pending Publication Date: 2019-02-22
HITACHI BUILDING TECH GUANGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the surface of the composite steel belt is covered with wear-resistant plastic materials such as polyurethane. During use, if the internal steel wire rope has defects such as warping, breakage, dislocation, and thinning, it cannot be identified by naked eyes, which will affect the safety of the elevator.
If there are potential defects in the internal wire rope at the factory, it is easy to scratch the surface rubber material, which is more likely to cause accidents

Method used

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  • Electromagnetic nondestructive testing method and device for elevator steel belt
  • Electromagnetic nondestructive testing method and device for elevator steel belt
  • Electromagnetic nondestructive testing method and device for elevator steel belt

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Embodiment 1

[0037] According to the thought of detection method provided by the present invention, design idea is as follows:

[0038] (1) It is planned to excite the steel strip to be tested as a whole. Since the diameter of the internal steel wire rope is relatively small, the internal steel wire rope can be excited to a near-saturated state without a large excitation intensity. Compared with traditional electromagnetic detection, the yoke can be removed. Use, reserve more space for the detection circuit board where the sensor is placed, and facilitate the installation of data output leads.

[0039] (2) if figure 1 As shown, the magnetization direction of the magnet is perpendicular to the surface of the steel strip to be tested. The magnetization directions of the two magnets on the upper side of the steel strip to be tested are opposite, and the magnetization directions of the two magnets on the lower side are also opposite. The magnetization directions of the two magnets at the same...

Embodiment 2

[0053] Embodiment 1 provides a principle framework and steps of an elevator steel strip electromagnetic nondestructive testing method, but in actual operation, in order to facilitate sensor arrangement and wiring, the following elevator steel strip electromagnetic nondestructive testing device can be designed.

[0054] According to the idea of ​​the detection device provided by the present invention, the design concept is as follows:

[0055] Step1: Design the size of the magnet and the spacing between the magnets through simulation to ensure that each wire rope is excited to a nearly saturated state;

[0056] Step2: In order to realize the detection and resolution of small defects, a magnetic detection sensor with high sensitivity can be selected, and the detection circuit should be designed to ensure that there is at least one sensor on each wire rope;

[0057] Step3: Design the detection device according to the size and placement of the magnet and the structure of the detec...

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Abstract

The invention provides an electromagnetic nondestructive testing method and device for an elevator steel belt. The testing method comprises the following steps: installing an excitation circuit, installing a detection unit, installing multiple sensing units and testing. The testing device comprises an excitation circuit, a detection unit, multiple sensing units, a device main body and an end cover. Compared with the traditional steel wire rope detection, the testing method and device disclosed by the invention have the advantages that a magnet yoke is not needed, the sensor layout and wiring are convenient, the size is small, the weight is light, and the testing accuracy is high; which specific steel wire rope has defects can be distinguished, and accurate positioning and testing can be realized. The testing method and device disclosed by the invention can be applied to online elevator steel belt detection, and are also applicable to periodic detection of the steel wire rope in the pre-delivery inspection and application processes.

Description

technical field [0001] The invention relates to the technical field of electromagnetic detection, in particular to an electromagnetic non-destructive detection method and device for steel belts of elevators, which is suitable for damage detection of multiple parallel slender ferromagnetic components, non-destructive detection of steel belts of elevators and other application fields. Background technique [0002] Composite steel belt is a new elevator transmission and load-bearing component. Its high traction and high flexibility make the volume of the host machine much smaller than that of traditional elevator products; More numbers, more durable and longer service life; and the use of composite steel belts can effectively reduce the vibration and noise of the elevator during operation. A number of elevator manufacturers are also gradually adopting and promoting the use of composite steel belts in elevators. [0003] However, the surface of the composite steel belt is cover...

Claims

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Application Information

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IPC IPC(8): G01N27/82
CPCG01N27/82
Inventor 张东来晏小兰高伟潘世旻张恩超张年朱雪丽
Owner HITACHI BUILDING TECH GUANGZHOU CO LTD
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