Wire rope flaw detection device

Patent metadata

Field	Value
Publication number	US-10571429-B2
Application number	US-201515564113-A
Country	US
Kind code	B2
Filing date	Apr 27, 2015
Priority date	Apr 27, 2015
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

A wire rope flaw detection device includes: a base unit including a magnetizer for forming a main magnetic path in the axial direction of a wire rope, and a magnetic sensor for detecting a leakage magnetic flux generated by a wire rope damaged part; and a guide unit including guide members and a guide plate which are formed in U shapes along the outer circumference of the wire rope, wherein the guide unit is fixed to the base unit.

First claim

The invention claimed is:

1. A wire rope flaw detection device comprising:
a base unit including a magnetic sensor for detecting a leakage magnetic flux generated by a wire rope damaged part magnetized by a magnetizer for forming a main magnetic path in an axial direction of the wire rope; and
a guide unit including guide members and a guide plate which are formed in U shapes along an outer circumference of the wire rope, on a side opposed to the wire rope, the guide plate being provided at an upper part of the magnetizer and the magnetic sensor, the guide members being fixed to the guide plate and being provided on both outer sides protruded outward in the wire rope axial direction of the guide plate, wherein
the guide unit is fixed to the base unit by a detachable fixation means, and
the guide members have cover accommodation steps and the depth of the cover accommodation steps is set to be deeper than the thickness of the guide plate.

2. The wire rope flaw detection device according to claim 1 , wherein
U-shaped portions of the guide members are formed of members thicker than a thickness of the guide plate.

3. The wire rope flaw detection device according to claim 1 , wherein
inner side surfaces at ends in the wire rope axial direction, of the guide members are formed so as to expand outward in a wire rope radial direction.

4. The wire rope flaw detection device according to claim 1 , wherein
a positioning pin and a positioning hole are provided at fixation portions of the guide unit and the base unit.

5. The wire rope flaw detection device according to claim 1 , wherein
a recess and a protrusion are provided at fixation portions of the guide unit and the base unit so as to be fitted into each other.

6. The wire rope flaw detection device according to claim 1 , wherein
the base unit is composed of: a main circuit portion including the magnetizer and the magnetic sensor; and columns provided on both sides in the wire rope axial direction of the main circuit portion, and
a recess and a protrusion are provided to the columns and the main circuit portion so as to be fitted into each other.

7. The wire rope flaw detection device according to claim 1 , wherein
the guide plate and the guide members are fixed to each other by bonding.

8. The wire rope flaw detection device according to claim 1 , wherein
the guide plate and the guide members are fixed to each other by welding.

9. The wire rope flaw detection device according to claim 1 , wherein
the guide plate and the guide members are fixed to each other by bolts.

10. A wire rope flaw detection device comprising:
a base unit including a magnetic sensor for detecting a leakage magnetic flux generated by a wire rope damaged part magnetized by a magnetizer for forming a main magnetic path in an axial direction of the wire rope; and
a guide unit including guide members and a guide plate which are formed in U shapes along an outer circumference of the wire rope, on a side opposed to the wire rope, the guide plate being provided at an upper part of the magnetizer and the magnetic sensor, the guide members being fixed to the guide plate and being provided on both outer sides protruded outward in the wire rope axial direction of the guide plate, wherein
the guide unit is fixed to the base unit by a detachable fixation means,
U-shaped portions of the guide members are formed of members thicker than a thickness of the guide plate, and
the guide members have cover accommodation steps and the depth of the cover accommodation steps is set to be deeper than the thickness of the guide plate.

11. The wire rope flaw detection device according to claim 10 , wherein
inner side surfaces at ends in the wire rope axial direction, of the guide members are formed so as to expand outward in a wire rope radial direction.

12. The wire rope flaw detection device according to claim 10 , wherein
a positioning pin and a positioning hole are provided at fixation portions of the guide unit and the base unit.

13. The wire rope flaw detection device according to claim 10 , wherein
a recess and a protrusion are provided at fixation portions of the guide unit and the base unit so as to be fitted into each other.

14. The wire rope flaw detection device according to claim 10 , wherein
the base unit is composed of: a main circuit portion including the magnetizer and the magnetic sensor; and columns provided on both sides in the wire rope axial direction of the main circuit portion, and
a recess and a protrusion are provided to the columns and the main circuit portion so as to be fitted into each other.

15. The wire rope flaw detection device according to claim 10 , wherein
the guide plate and the guide members are fixed to each other by bonding.

16. The wire rope flaw detection device according to claim 10 , wherein
the guide plate and the guide members are fixed to each other by welding.

17. The wire rope flaw detection device according to claim 10 , wherein
the guide plate and the guide members are fixed to each other by bolts.

Assignees

• Mitsubishi Electric Corp

Inventors

• Terai Yoshiyuki
• Yoshioka Takashi
• Hoshinoo Tomokazu
• Akashi Masao

Classifications

• G01N27/83 Primary

  by investigating stray magnetic fields · CPC title

• G01N27/87 Primary

  using probes · CPC title