Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Wire rope flaw detection device

A flaw detection device, wire rope technology, applied in the direction of material magnetic variables, etc., can solve the problems of leakage magnetic flux, increase and so on

Active Publication Date: 2009-05-27
HITACHI LTD
View PDF1 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The leakage magnetic flux generated from the broken part tends to increase as the magnetic flux emitted toward the broken part becomes larger. However, as the wire rope approaches the magnetic saturation state, the magnetic flux leaking from the uneven part on the surface of the wire rope will appear. The flux also increases, or the magnetic flux generated by the magnetization unit of the magnetized wire rope does not enter the wire rope and the magnetic flux leaking in the air also increases.

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
  • Wire rope flaw detection device
  • Wire rope flaw detection device
  • Wire rope flaw detection device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0038] figure 1 It is an exploded perspective view showing a wire rope flaw detection device (hereinafter referred to as a flaw detection device) according to a preferred embodiment, figure 2 yes figure 1 Sectional view of the flaw detection device shown.

[0039] Such as figure 1 As shown, the flaw detection device 10 has a guide wire rope 1 ( figure 2 As shown), the guiding device 2, the magnetization unit 4 for magnetizing the steel wire rope 1, and the magnetic flux detection unit 3 for detecting the leakage magnetic flux of the steel wire rope 1.

[0040] The guide 2 is formed of a non-magnetic plate material having a semi-cylindrical recess 11 in which the wire rope 1 is held so as to be movable (slidable) in the wire rope length direction. Both sides of the concave portion 11 of the guide 2 are bent so that the magnetization unit 4 can be fitted (to form both side portions 12 , 12 ).

[0041] The magnetization unit 4 is composed of a permanent magnet type U-shape...

no. 2 Embodiment approach

[0077] Hereinafter, a second embodiment which is a preferred embodiment of the present invention will be described with reference to the drawings.

[0078] Such as Figure 8 As shown, the basic structural parts of the wire rope flaw detection device 30 of this embodiment and figure 1 The above-mentioned flaw detection device 10 shown is roughly the same, and for the same structural part, use and figure 1 The same symbols indicate that the difference between this embodiment and the previous embodiment is that the figure 1 In the shown spacer 5 , a gap (air gap) 31 is provided between the magnetic pole surface 4 a of the magnetization unit 4 and the guide device 2 , and the length of the gap can be adjusted.

[0079] That is, in the flaw detection device 30 of this embodiment, a gap 31 is formed between the magnetization unit 4 and the guide device 2, and a mechanism for adjusting the gap length of the gap 31 is provided, and the magnetic flux adjustment is configured by this ...

no. 3 Embodiment approach

[0087] A third embodiment which is a preferred embodiment of the present invention will be described below.

[0088] Such as Figure 10 (a) and Figure 10 As shown in (b), the basic structure of the wire rope flaw detection device 40 of this embodiment is the same as that of the flaw detection device 20 in the previous embodiment, but the difference is that in this embodiment, as the guide device 2 and the magnetization unit 4 The mechanism for forming a length-variable gap between the magnetic pole faces 4a is provided so that the frame 41 (made of non-magnetic material) for accommodating the magnetizing unit 4 and the guide device 2 are integrated, and the magnetizing unit 4 is adjusted within the frame 41. And be fixed on the mechanism (arbitrary adjustment mechanism 42 of magnetization unit) on arbitrary height. That is, in the present embodiment, the magnetic flux adjustment unit is constituted by the magnetization unit arbitrary adjustment mechanism 42 , which is a mec...

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

The invention provides a steel wire rope fault detection apparatus capable of conveniently carrying out fault detection diagnosis. The steel wire rope fault detection apparatus has a magnetization unit (4) and a flux detection unit (3), the magnetization unit (4) magnetizes a steel wire rope (1) intertwined with a plurality of steel wires (1a), the flux detection unit (3) detects leakage flux of the steel wire rope (1), furthermore the steel wire rope fault detection apparatus further has a magnetic flux adjusting unit (5) for adjusting magnetic flux through the steel wire rope (1).

Description

technical field [0001] The invention relates to a steel wire rope flaw detection device. Background technique [0002] In general, steel wire ropes used in elevators, elevators, cable cars or cranes are made of twisted steel wires. Due to fatigue and wear of this type of wire rope, the wires constituting the wire rope may gradually break. When the number of broken steel wires gradually increases with the passage of time, causing the number of broken steel wires to exceed the standard value, it is judged that the service life of the steel wire rope is reached and replaced. Therefore, it is necessary to detect the number of broken steel wires through regular inspections, and to evaluate whether the steel wire rope can continue to be used safely. [0003] Conventionally, the number of broken wire ropes in use has been visually inspected. However, when inspecting a long steel wire rope, it takes a long time to work if the inspection is performed with the naked eye. [0004] ...

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 Applications(China)
IPC IPC(8): G01N27/83
Inventor 浅井大辅有贺正记
Owner HITACHI LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com