Flaw detector for wire rope

A flaw detection device and steel cable technology, applied in the direction of material magnetic variables, etc., can solve problems such as large pushing force, influence of leakage magnetic flux detection value, and difficulty in setting, and achieve the effects of suppressing vibration, suppressing output changes, and improving reliability
CN101750451AActive Publication Date: 2010-06-23HITACHI BUILDING SYST CO LTD
1 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HITACHI BUILDING SYST CO LTD
Publication Date
2010-06-23

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention provides a flaw detector for wire rope, which can less maintain the pushing force relatively to the radial direction of wire rope and can restrain the vibration of the wire rope. The flaw detector comprises the following components: a pair of permanent magnets (2a,2b) which perform magnetization in the length direction of the wire rope (4); a magnetic sensor (3) which is configured near the part of wire rope (4) magnetized by the permanent magnets (2a,2b) for detecting the leakage flux leaded from the magnetized part of the wire cable (4); and a pair of positioning mechanisms (5,6) which are used for positioning the permanent magnets (2a,2b) and the magnetic sensor (3) relatively to the wire rope (4). Each of the positioning mechanisms (5,6) comprises the following components: rotating members (5a,5b,5c,6a,6b,6c) which contact with a mode of surrounding three respective positions on the periphery of the wire rope (4); and spiral springs (5d,5e,6d,6e) which cause the rotating members (5a,5b,5c,6a,6b,6c) to generate compact contact forces relatively to the wire rope (4).
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a flaw detection device for steel cables suitable for electromagnetic flaw detection. Background technique

[0002] Steel cables are widely used in elevators, elevators, cable cars, cranes, etc. However, depending on the frequency of use, local damage due to fatigue or wear occurs, and the steel cables of the structural elements are sequentially broken. This amount of breakage increases year by year, and when the amount of breakage exceeds a predetermined value, the steel cable is judged to have reached the end of its service life and is replaced. Therefore, it is necessary to evaluate whether the steel cable can be used safely by measuring the amount of breakage of the steel cable through regular inspections.

[0003] In order to check the amount of breakage of such a steel cable in use, an electromagnetic flaw detection method is known as a flaw detection method for a steel cable that can be easily used. As a device...

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