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Inspection tool for wire rope

A diagnostic device and sling technology, applied in transportation and packaging, material magnetic variables, elevators, etc., can solve problems such as difficulty in judging sling damage, small leakage magnetic flux, and difficulty in judging sling wire breakage.

Inactive Publication Date: 2012-06-20
HITACHI LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] That is to say, due to the small distance between the broken ends and the small leakage magnetic flux when the steel wire breaks, the output voltage of the detector becomes small. It is also difficult to judge whether the steel wire inside the sling is broken

Method used

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  • Inspection tool for wire rope
  • Inspection tool for wire rope
  • Inspection tool for wire rope

Examples

Experimental program
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Embodiment Construction

[0031] Such as figure 1 As shown, the elevator is composed of an elevator car 7 , a rope 2 , a sheave 1 around which the rope 2 is wound, a hoist 6 having the sheave 1 , and a counterweight 8 . The sling flaw detector consists of a magnetizer for magnetizing the sling 2, a magnetic flux detection sensor for detecting leakage magnetic flux caused by damage to the sling 2, and a sliding mechanism for keeping a certain distance between the sling 2 and the magnetic flux detection sensor. board composition. When diagnosing whether the wire of the sling 2 is broken, the sliding plate is brought into contact with the sling 2, and the surface of the sling 2 opposite to the surface in contact with the sheave 1 is used as a measurement surface for measurement.

[0032] In order to magnetize a part of the sling 2, two permanent magnets with different magnetic poles are arranged in the longitudinal direction of the sling, and a sensor for detecting magnetic flux is arranged between the t...

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PUM

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Abstract

In an inspection tool (10) for an elevator wire rope for detecting a leakage flux by magnetizing a part of a rope (2) used for an elevator and measuring damage of the rope (2), a curvature portion is formed by pushing and curving the rope (2) in a longitudinal direction and a leakage flux is detected by magnetizing the curvature portion.

Description

technical field [0001] The present invention relates to an elevator rope diagnostic device for detecting damage to an elevator rope, and more particularly, to an elevator rope diagnostic device capable of measuring damage occurring inside a rope with high precision. Background technique [0002] The damage mode of the elevator sling includes a damage mode in which wires on the surface of the sling break and a damage mode in which wires inside the sling break. The shape of the groove of the sheave will have a great influence on the breaking position of the steel wire. When using a sheave with a V-shaped groove, the surface of the groove will rub against the sling, causing the sling to break with the groove. The steel wire on the contact surface is prone to breakage. In addition, when a sheave with a circular groove shape is used, damage may develop inside the sling. It is especially important to measure with high precision the damage that occurs inside the sling. At presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/83
CPCB66B7/123G01N27/82B66B7/12
Inventor 早川智久野口直昭早野富夫浅井大辅大西友治关谷太志
Owner HITACHI LTD