Unlock instant, AI-driven research and patent intelligence for your innovation.

Inspection equipment for wire rope

A technology of steel wire rope and equipment, applied in the field of wire rope flaw detection equipment, can solve the problems of small output of magnetic detection sensor, and achieve the effect of improving reliability

Active Publication Date: 2011-06-08
HITACHI LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the fractured position of the steel wire exists inside the wire rope, the output of the magnetic detection sensor is small because the fractured position is far away from the magnetic detection sensor.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inspection equipment for wire rope
  • Inspection equipment for wire rope
  • Inspection equipment for wire rope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] figure 1 Indicates the structure of the flaw detection equipment for steel wire rope.

[0034] A magnetizer 2 is provided, which magnetizes the steel wire rope 1 in the length direction. Around the wire rope 1, as a magnetic detection device (coil, magnetic sensor), a first magnetic detection device 3 for detecting the magnetic flux of the entire circumference, a plurality of second magnetic detection devices 4a-4h, and a third magnetic detection device 4i-4h are provided. 4p, the detection devices are adjacently arranged on the entire circumference of the steel wire rope 1 in a ring shape.

[0035] The phase difference between the second magnetic detection devices 4a-4h and the third magnetic detection devices 4i-4p is 90°, 4i is set between 4a and 4b, 4j is set between 4b and 4c, and so on, the 4k~4p are respectively set between 4a~4h. The output of the first magnetic detection device 3 is input to a totalizer 5 . The outputs of the second magnetic detection devic...

Embodiment 2

[0060] Figure 8 The second embodiment is shown, and the first magnetic detection device 3 , the second magnetic detection devices 4 a to 4 h , and the third magnetic detection devices 4 i to 4 p are arranged in a position shifted in the longitudinal direction. Thereby, at the time of installation, since wiring does not overlap, installation can be performed easily.

[0061] In addition, time correctors 14a to 14c are provided so that the output values ​​of the respective magnetic detection devices are output values ​​on the same cross-section of the wire rope. That is, when measuring while moving the wire rope 1, if the moving speed of the wire rope 1 is v [m / s], the distances between the magnetic detection device 3 and the magnetic detection devices 4a-4h, 4i-4p are L [m], when the steel wire rope 1 passes through the magnetic detection device 3 first, then through the magnetic detection devices 4a~4h, and finally through the magnetic detection devices 4i~4p, the output of ...

Embodiment 3

[0064] Figure 9 Showing the third embodiment, since the end of the wire rope in use is fixed, the detection device is divided into a plurality of sensor units to facilitate the passage of the wire rope.

[0065] Such as Figure 9 As shown, when the detection device is divided into two by the dividing surface 16, the first magnetic detection device 3 is connected to output the sum of the two divided magnetic detection devices 17a and 17b. In addition, since one of the second magnetic detection devices 4a-4h and the third magnetic detection devices 4i-4p may be located on the dividing surface 16, the magnetic detecting devices straddling the dividing surface 16 are divided into two, And adjust the sensitivity so that the sum of the magnetic detection device after division is equal to that before division.

[0066] The specific method is as Figure 9 As shown, if the dividing surface 16 is positioned at the position passing through the center of the magnetic detecting device ...

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

PUM

No PUM Login to View More

Abstract

A flaw detector of a wire-rope is provided which can detect a leakage magnetic flux caused in a damaged part of a steel wire. The flaw detection includes a magnetizer (2) for magnetizing a wire-rope (1) in the longitudinal direction of the latter, a plurality of magnetic detection means (3, 4) arranged in the circumferential direction of the wire-rope (1), for detecting a leakage magnetic flux, storages (8, 10) previously storing therein depths of damage parts, values of damage, sums of values detected by the plurality of magnetic detection means, difference values detected by adjacent magnetic detection means, wherein a depth and a value of damage of the damaged value are obtained from the values detected by the magnetic detection means and then the value stored in the storage, thereby enhancing the reliability of measurement for a damage which is located even in a deep part of the wire-rope.

Description

technical field [0001] The present invention relates to a wire rope flaw detection device that detects damage states such as breaks and broken wires of wire rope strands in order to ensure the safety of various devices using wire ropes. , it is not necessary to remove the wire rope from the equipment, but the wire rope in use can be directly detected. Background technique [0002] In wire ropes used in elevators, hoists, cable cars, cranes, etc., due to fatigue and wear, the steel wires that make up the strands may break sequentially, and the amount of breaks increases with age. When the amount of breakage exceeds a predetermined amount, it is judged that the wire rope has reached the end of its service life, and the wire rope is replaced. Therefore, it is necessary to measure the breakage of the steel wire through regular inspections to determine whether the steel wire rope can be used safely. [0003] Historically, the amount of breakage of wire ropes in service has been...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/85
CPCG01N27/87
Inventor 浅井大辅有贺正记
Owner HITACHI LTD