CN2270973Y

CN2270973Y - Permanent magnet flaw detector

Info

Publication number: CN2270973Y
Application number: CN 96201680
Authority: CN
Inventors: 储东生
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-01
Filing date: 1996-02-01
Publication date: 1997-12-17
Anticipated expiration: 2006-02-01

Abstract

The utility model relates to a permanent magnet flaw detector. Two permanent magnets are arranged on a magnetic yoke, steel cables can be directly arranged in two semicircular magnetic shoes, and 8-16 Hall sensors are arranged in the periphery of the inner rope of a magnet pole. Magnetic force lines can form a return circuit among the magnetic shoes, the magnets and the magnetic yoke, the sensor can detect the filament breakage position and situation, and therefore, the utility model can prevent from breaking.

Description

The permanent magnet defectoscope

The utility model relates to a kind of permanent magnet defectoscope, is to utilize the magnetic of permanent magnet and the defectoscope of Hall element combination, belongs to the technical field of defectoscope.

Wire rope is widely used, for example as hanging bridge, crane, windlass or the like, in use, owing to fracture of wire takes place, intensity is reduced, finally fracture, be difficult to again in advance find, not resembling the rope made of hemp can be scared before this in advance, did not also resemble chain and can see the chain link weld cracking in advance, can in time change and the generation of stopping accident, flaw detection for the steel material, usually magnetic always, methods such as ultrasound wave are surveyed, and the result is satisfactory not enough sometimes.

The purpose of this utility model is that a kind of permanent magnet defectoscope will be provided, it can overcome above-mentioned shortcoming, two magnet cartridges are on the two ends of yoke, the magnetic boots are by two semicircle compositions, wire rope can directly place in the magnetic boots, the magnetic line of force forms a loop at wire rope between magnetic boots pole magnet and the yoke, can correctly in time find the fracture of wire situation by the Hall element around the wire rope.

The purpose of this utility model is achieved in that

A kind of permanent magnet defectoscope, it is characterized in that ferromagnetic permanent magnet (1) (2) places yoke (3) top, two ends respectively, its polarity is different, be equipped with magnetic pole (4) and semicircle magnetic boots (5) on the magnet (1) (2), the wire rope (6) that desire detects places between two semicircle magnetic boots (5), a uniform 8-16 Hall element (7) around rope (6).

Fig. 1 permanent magnet defectoscope synoptic diagram.

Fig. 2 Hall element distribution schematic diagram.

Now in conjunction with the accompanying drawings the structure of permanent magnet defectoscope is described in detail:

By Fig. 1, ferromagnetic permanent magnet (1) (2) places yoke (3) above the two ends respectively, the magnetic of permanent magnet (1) (2) is opposite mutually, permanent magnet (1) upper end is the N utmost point, the lower end is the S utmost point, and magnet (2) antithesis, magnet (1) (2) top is magnetic pole (4) and magnetic boots (5), this magnetic pole (4) and magnetic boots (5) all are semicircle, form by 2 parts, with the fixing (not shown) of screw, the wire rope (6) that desire detects just places between 2 magnetic boots (5), at uniform all around 8-16 the Hall element of wire rope (6) (7).

Because wire rope (6) length is longer, adopts semicircular magnetic boots (5), can avoid an end of rope is penetrated in magnetic boots (5) hole, but can directly place wire rope (6) in the semicircle magnetic boots (5), fixed; Loading and unloading, and change detection position is all extremely easy.

The magnetic line of force (8) as shown in FIG., when the magnetic line of force (8) through the broken string position, Hall element (7) will correctly reflect its position.

Permanent magnet (1) (2) is the NEOREC-35H material.

Compared with prior art, permanent magnet flaw detector has following advantages:

1, volume is little, and is easy to use.

2, can high accuracy measure inside and outside fracture of wire and distortion, precision can reach section and decrease Wound accounts for the steel cable area more than 0.8%, in time prevents the consequence that wire cable rupture causes.

3, manufacturing is simple and easy.

Claims

1, a kind of permanent magnet defectoscope, it is characterized in that ferromagnetic permanent magnet (1) (2) places yoke (3) top, two ends respectively, its polarity is different, be equipped with magnetic pole (4) and semicircle magnetic boots (5) on the magnet (1) (2), the wire rope (6) that desire detects places between two semicircle magnetic boots (5), a uniform 8-16 Hall element (7) around rope (6).