JPH11237368A - Magnetization device, ultraviolet irradiation device, detecting-liquid spraying device, and magnetic particle detecting and inspection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a magnetization device which does not require an external power supply and which can be easily carried, by installing a power-supply device, which supplies electricity to an electromagnet used to excite a contactor at a magnetization device body. SOLUTION: In the magnetization device 11, a U-shaped electromagnet 13 and a power- supply device 14 are built in a body case 12 which has an electrical insulating property and which is composed of an armor plate made of a plastic such as a high-strength and lightweight carbon fiber plastic or the like. In the electromagnet 13, an exciting coil 16 is wound on a U-shaped coil 15 in which a plurality of flat rolled silicon steel sheets are laminated. The power-supply device 14 is connected electrically to the exciting coil 16. In the electromagnet 13, a pair of magnetic poles at tip parts of a U-shape are formed as probes 17a, 17b as contact terminals. In a magnetic particle inspection apparatus, an object to be inspected is magnetized by the magnetization device 11, an inspection liquid which contains wet fluorescent magnetic particles or the like is sprayed on a magnetization part by an inspection-liquid spraying device, ultraviolet rays are irradiated by an ultraviolet irradiation device, the pattern of the magnetic particles which are agglomerated and adhered onto a detect part is inspected visualy, and the defect part can be detected nondestructively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a magnetic particle inspection apparatus for nondestructive inspection.

[0002]

2. Description of the Related Art Conventionally, as a magnetic particle flaw detection (hereinafter referred to as M）) apparatus using a magnetic flaw detection method of a nondestructive test, a general type
There are types such as dedicated type portable type and stationary type, and the configuration is
It consists of a magnetizing device, a test liquid spraying device, an ultraviolet irradiation device, and a demagnetizing device. Among these, portable configurations that are generally commercially available and used include a magnetizing device, an ultraviolet irradiation device, and a test solution spraying device.

FIG. 8 is a partially cut-away configuration view of a conventional magnetizing device 1. The magnetizing device 1 has an electromagnet 3 built in a case 2 made of an exterior plate made of ebonite or the like, and forms a pair of magnetic poles of the electromagnet 3 on probes 4 a and 4 b as contact terminals, while exciting the electromagnet 3. For example, the coil 5
A power cable 7 such as a rubber-coated electric wire is electrically connected to an external power supply 6 such as a commercial power supply of 00V.

When an exciting coil 5 supplied from an external power supply 6 via a power cable 7 excites the electromagnet 3, a probe 4a, which is a pair of magnetic poles of the electromagnet 3, is used.
4b magnetizes the magnetic particle flaw inspection object with which it is in contact.

FIG. 9 is a partially cutaway view of a conventional ultraviolet irradiation device 8. The ultraviolet irradiation device 8 has a built-in UV (ultraviolet) lamp 9 in a case 8a made of an outer plate made of, for example, an iron plate, and a stabilizer 9a for the UV lamp 9.
And a power cable 9b such as a rubber-coated electric wire for electrically connecting the ballast 9a to an external power supply 10 such as a commercial power supply of AC 100V. Note that FIG.
Reference numeral 8b denotes a filter for cutting light having a wavelength that deteriorates the identification of the fluorescent magnetic powder pattern.

[0006]

However, in such a conventional portable device, since both the magnetizing device 1 and the ultraviolet irradiation device 8 require an AC voltage of, for example, 100 V, there is no external power supply 10. Not available in place.
Furthermore, since these commercially available devices are large in size, the exterior plate of the case 8a of the ultraviolet irradiation device 8 is an iron plate, and the power supply cables 7, 9b such as heavy rubber-coated electric wires are provided together. Although the device as a whole is heavy and portable, it is actually inconvenient to carry.

Further, in the conventional portable magnetizing device 1, the probes 4a and 4b, which are contact terminals that come into contact with the inspection object, are rigid rod-shaped and thick, and only a part of the tip is movable in order to magnetize the inspection object. It is difficult to make contact with an object to be inspected because it is inserted into an extremely narrow site. This makes local inspection extremely difficult to magnetize.

Further, since the conventional ultraviolet irradiation device 8 has a large irradiation surface, the ultraviolet light diffuses, and it is difficult to observe an extremely narrow portion of the inspection object.

Further, in the conventional test liquid spraying apparatus,
In the case of carrying out a portable MΤ (magnetic particle flaw detection inspection), since a test liquid such as a wet fluorescent magnetic powder is sprayed by a can spray, the spray range is expanded. For this reason, since the spray range may deviate from the narrow inspection target site, there is a problem that it is inconvenient for the narrow inspection target region. The size of the can spray is, for example, 65 mm in diameter and 180 mm in height (φ65 × 180 mm, capacity 270 g).
Because it is disposable with a large high-pressure can spray,
The portable type has a problem that it is bulky and expensive.

The present invention has been made in view of the above circumstances, and has as its object to provide a magnetizing device, an ultraviolet irradiation device, and a magnetic particle flaw inspection device which do not require an external power supply and are easy to carry. Is to provide an easy-to-use test liquid spraying device.

[0011]

In order to solve the above-mentioned problems, a magnetizing device according to a first aspect of the present invention comprises a contact terminal which contacts a magnetic particle flaw inspection object and magnetizes the contact terminal, and A power supply device for supplying power to the electromagnet is provided in a magnetizing device main body having an electromagnet to be excited.

According to the present invention, since the power supply device for supplying power to the electromagnet for exciting the contact terminals is provided in the magnetizing device main body, no external power supply is required. For this reason, MT (magnetic particle flaw detection inspection) is possible even in a place where there is no power supply, and it is not necessary to provide a power cable such as a heavy rubber-coated electric wire, so that the size and weight can be reduced.

[0013] A magnetizing device corresponding to claim 2 is claim 1.
In the magnetizing device described above, the contact terminal is formed to be flexible.

According to the present invention, in addition to the function and effect of the first aspect of the invention, the contact terminal can be bent and brought into contact with a narrow portion of the magnetic particle flaw inspection object to be locally magnetized. . In other words, even in a narrow part of the magnetic particle flaw inspection target, M
T can be performed.

According to a third aspect of the present invention, there is provided a magnetizing device.
In the magnetizing device described in Item 2, the outer surface other than the contact surface of the contact terminal that comes into contact with the inspection object for magnetic particle flaw detection is covered with a magnetic shield.

According to the present invention, in addition to the functions and effects of the first or second aspect of the present invention, the leakage of the magnetic flux from the outer surface of the contact terminal other than the contact surface in contact with the magnetic particle flaw inspection object is prevented by the magnetic shield. It can be prevented or reduced. For this reason, since the magnetization efficiency of the contact terminal can be improved, and only the portion to be inspected can be locally magnetized by the contact surface of the contact terminal, the magnetization accuracy can be improved, As a result, the accuracy of magnetic particle flaw detection inspection can be improved.

According to a fourth aspect of the present invention, there is provided a magnetizing device.
4. The magnetizing device according to any one of claims 1 to 3, wherein the outer plate of the magnetizing device main body is made of plastics.

According to this invention, in addition to the functions and effects of the invention according to any one of claims 1 to 3, the outer plate of the magnetizing device is made of carbon having electrical insulation, high strength and light weight. Since plastics such as fiber plastic is used, the weight of the magnetizing device body and the portability thereof can be improved.

According to a fifth aspect of the present invention, there is provided an ultraviolet irradiating apparatus having an ultraviolet lamp for generating ultraviolet light and an ultraviolet irradiating section for irradiating an ultraviolet ray from the ultraviolet lamp to a magnetic particle flaw inspection object. A power supply device for supplying power to the ultraviolet lamp is provided.

According to the present invention, since the power supply for supplying power to the ultraviolet lamp is provided in the ultraviolet irradiation device main body, no external power supply is required. For this reason, MT (magnetic particle flaw detection inspection) is possible even in a place where there is no power supply, and it is not necessary to provide a power cable such as a heavy rubber-coated electric wire, so that the size and weight can be reduced.

According to a sixth aspect of the present invention, there is provided an ultraviolet irradiation apparatus according to the fifth aspect, wherein the ultraviolet irradiation section is formed to be flexible.

According to the present invention, in addition to the function and effect of the fifth aspect of the present invention, the ultraviolet irradiation portion can be bent to irradiate a narrow portion of the magnetic particle flaw inspection object with ultraviolet light. Accuracy can be improved, and as a result, magnetic particle flaw detection accuracy can be improved.

According to a seventh aspect of the present invention, there is provided an ultraviolet irradiating apparatus according to the fifth or sixth aspect, wherein a light diffusing section is formed in an ultraviolet irradiating section for irradiating ultraviolet rays.

According to this invention, in addition to the functions and effects of the fifth or sixth aspect, the ultraviolet rays emitted from the ultraviolet irradiation section are diffused by the light diffusion section and then irradiated to the magnetic particle flaw inspection object. Thus, the illuminance of the irradiated portion can be equalized.

According to an eighth aspect of the present invention, there is provided an ultraviolet irradiation apparatus according to any one of the fifth to seventh aspects, wherein an exterior plate of a main body of the ultraviolet irradiation apparatus is made of plastics.

According to the present invention, in addition to the functions and effects of any one of claims 5 to 7, the exterior plate of the main body of the ultraviolet irradiation device has electric insulation, high strength and light weight. Since the plastics such as carbon fiber plastic is used, the weight of the body of the ultraviolet irradiation device can be reduced and the portability can be improved.

According to a ninth aspect of the present invention, there is provided a test liquid spraying apparatus characterized in that a main body of a test liquid spraying apparatus for spraying a test liquid onto a magnetic particle flaw detection test object is configured to be able to supply the test liquid thereto.

According to the present invention, even if the test liquid in the main body of the test liquid spraying device is used up, the main body of the test liquid spraying device can be replenished with the test liquid, so that the main body of the test liquid spraying device can be reused. It is. Therefore, the cost can be reduced as compared with a conventional disposable test liquid spray device, and the size of the test liquid spray device main body can be reduced. In addition, the portability of the test liquid spray device can be improved by miniaturization.

According to a tenth aspect of the present invention, there is provided a magnetic particle flaw inspection apparatus according to any one of the first to third aspects, an ultraviolet irradiation apparatus according to the fifth aspect, and an ultraviolet irradiation apparatus. And a test liquid spraying device according to claim 9.

According to the present invention, the magnetizing device according to any one of claims 1 to 3, the ultraviolet irradiation device according to any one of claims 5 to 8, and the test liquid spray according to claim 9 , And thus have substantially the same operation and effects as those of these devices.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference characters.

FIG. 1 is a partially cutaway view showing a first embodiment of a portable magnetizing device 11 used in a magnetic particle inspection apparatus according to the present invention. First, this magnetic particle inspection system
The test object is magnetized by the magnetizing device 11 and a test liquid such as wet fluorescent magnetic powder is sprayed on the magnetized portion by a test liquid spraying device (not shown), and then ultraviolet rays are irradiated by the ultraviolet irradiation device 21 shown in FIG. By irradiating and visually observing a magnetic powder pattern formed by cohesion and adsorption on a defect portion of the inspection object, the defect portion of the inspection object can be nondestructively flaw-detected.

As shown in FIG. 1, the magnetizing device 11 is provided, for example, in a main body case 12 made of a plastics outer plate made of a carbon fiber plastic or the like which is electrically insulating and has high strength and light weight. Figure-shaped electromagnet 13
And a power supply device 14. The electromagnet 13 is, for example, a U-shaped iron core 1 formed by laminating a plurality of silicon steel plates.
5, an excitation coil 16 is wound, and a power supply 14 is electrically connected to the excitation coil 16. The electromagnet 13
A pair of magnetic poles at the U-shaped tip are formed on probes 17a and 17b, which are contact terminals.

The power supply device 14 is, for example, a small battery that outputs a direct current (DC) of a predetermined voltage, or a combination of the small battery and the DC output therefrom with a predetermined voltage of A.
It has a converter (not shown) such as an inverter for converting into C (alternating current) and a power stabilizer (not shown). The exciting coil 16 is excited by direct current or alternating current, and is brought into contact with a pair of probes 17a and 17b. The magnetic particle flaw inspection object (not shown) is magnetized with a magnetic flux density required for MΤ. In addition, the magnetizing device 11 can be reduced in size by assembling the small battery as a structural wall in the main body case 12 or in the dead space. In FIG. 1, a power on / off switch and the like are not shown.

FIG. 2 is a partially cutaway view of a magnetizing device 11a according to a second embodiment of the present invention. This magnetizing device 11a
Is characterized in that the power supply device 14 or its small battery is provided outside the main body case 12. According to this, the power supply device 14 or the small battery thereof is provided outside the main body case 12 by the amount of the main body case 1.
2 can be reduced in size.

FIG. 3 is a partial longitudinal sectional view of a magnetizing device 11b according to a third embodiment of the present invention. This is because the pair of probes 17c and 17d are formed of a material having conductivity and flexibility and are longer than the pair of probes 17a and 17b.
Is characterized in that the outer surface other than the contact surface that contacts the inspection part 18a is covered with a flexible magnetic shield 19 such as a magnetic shield rubber.

According to this, the pair of probes 17c, 1
By bending 7d, it can be brought into contact with the narrow inspection portion 18a of the magnetic particle flaw detection inspection object 18 and can be locally magnetized, so that the magnetization accuracy can be improved.
As a result, the accuracy of magnetic particle flaw detection inspection can be improved.

Further, since the leakage of magnetic flux from the outer surfaces of the pair of probes 17c and 17d can be prevented or reduced by the anti-magnetic rubber 19, the pair of probes 1c and 17d can be prevented from leaking.
It is possible to improve the magnetization efficiency of 7c and 17d.

FIG. 4 is a partially cutaway view of an ultraviolet irradiation device 21 according to a fourth embodiment of the present invention. The ultraviolet irradiation device 21 irradiates ultraviolet light after a fluorescent test solution is sprayed onto the inspection portion 18a of the magnetic particle flaw inspection object 18 magnetized by any of the magnetizing devices 11, 11a, and 11b. There is, for example, a body case 22 made of an outer plate made of plastics such as carbon fiber plastic having high electric strength and light weight having electric insulation,
UV lamp (ultraviolet ray generating bulb) 23, power supply device 14
A power supply unit 24, a UV mirror (ultraviolet reflection plate) 25, and a filter 26, which are almost the same as those of the first embodiment, are respectively provided. In the drawing, reference numeral 27 denotes a pair of lead wires for electrically connecting the UV lamp 23 to the power supply 24.

The UV lamp 23 emits UV of a predetermined wavelength required for MT, and the UV mirror 25 reflects the UV from the lamp 23 to the light emitting port of the main body case 22 and is disposed at the light emitting port. The filter 26 blocks wavelengths that deteriorate the identification of the fluorescent magnetic powder pattern and wavelengths that have an adverse effect on the human body.

FIG. 5 is a partially cutaway view of an ultraviolet irradiation device 21a according to a fifth embodiment of the present invention. The ultraviolet irradiation device 21a is characterized in that the power supply device 24 or its small battery is provided outside the main body case 22. According to this, the size of the main body case 22 can be reduced by the amount of providing the power supply device 24 or its small battery outside the main body case 22.

FIG. 6A is a schematic diagram of a main part of an ultraviolet irradiation device 21b according to a sixth embodiment of the present invention. The ultraviolet irradiation device 21b has a plurality of small hemispherical projections 26a, 26a... 26a integrally formed on the outer surface of the filter 26, and a diffusion surface 28 for diffusing UV indicated by an arrow in the figure.
Is formed. Thus, the brightness of the light emitted from the filter 26 can be equalized.

However, in this filter 26, a plurality of small hemispherical projections 26a, 26a...
6A, dust easily adheres to the outer surface and easily becomes dirty. Therefore, as shown in FIG. 6B, the outer surface of the filter 26 is formed as a flat surface, while the inner surface of the UV mirror 25 is formed as a multi-surface structure. Alternatively, it may be formed on the diffusion surface 25a. Thereby, the contamination on the outer surface of the filter 26 can be reduced.

FIG. 7 is a partially cutaway view of an ultraviolet irradiation device 21c according to a seventh embodiment of the present invention. The ultraviolet irradiation device 21c is characterized in that a thin, flexible and bendable light emitting tube 29 is provided in the light emitting opening of the main body case 22. The light emitting tube 29 is formed on a reflective surface that reflects ultraviolet light or is filled with a flexible light transmitting material that transmits ultraviolet light, inside the thin, flexible and light-shielding flexible hollow tube. It consists of.

According to this, the light emitted from the UV lamp 23 is filtered by the filter 26 by bending the light projecting tube 29.
Then, the light is reflected on the reflection surface in the light projecting tube 29, or is transmitted through the light transmitting material, and is irradiated on the magnetic particle flaw detection inspection object. That is, since the magnetic particle flaw inspection object can be locally irradiated with ultraviolet rays, it is possible to perform MT even on a narrow portion of the magnetic particle flaw inspection object.

A test liquid spraying device (not shown) fills a required amount of test liquid such as a wet fluorescent magnetic powder into an injection container having an injection port such as a syringe or an oil bottle, and manually applies the test to the magnetic particle flaw inspection target. It is characterized by the fact that the injection container is configured to be replenishable with the test liquid, thereby enabling the injection container to be used repeatedly rather than disposable.

For example, an openable lid that can be sealed in a spray can is provided, and wet fluorescent magnetic powder is replenished therefrom. Further, by applying a predetermined pressure to the spray can with a manual pump or the like, the wet fluorescent magnetic powder is sprayed. You may comprise so that a spray can can be reused.

According to this, since the spray container such as a spray can can be reused, the inspection cost can be reduced as compared with the case of using a disposable spray can, and the inspection container can be installed in the spray container. Since the liquid can be supplied, the size and weight of the injection container can be reduced.

By appropriately combining the above inventions, it is possible to reduce the size of the device without preparing a power source in a place without a power source, and to reduce the size of the device, thereby making it easy to carry and reducing the fatigue of workers. , Narrow and complex objects can be made MΤ, and inspection accuracy and inspection cost can be reduced

[0050]

As described above, according to the present invention,
Since the power supply device is provided in the magnetizing device main body or the ultraviolet irradiation device main body so as to be able to supply power, an external power supply is not required. For this reason, MT (magnetic particle flaw detection inspection) is possible even in a place where there is no power supply, and it is not necessary to provide a power cable such as a heavy rubber-coated electric wire, so that the size and weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially cut-away main part configuration diagram of a magnetizing device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a part of a magnetization device according to a second embodiment of the present invention;

FIG. 3 is a partially cutaway main part configuration diagram of a magnetizing device according to a third embodiment of the present invention.

FIG. 4 is a partial cutaway main part configuration diagram of an ultraviolet irradiation device according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of a partially cut-away main part of an ultraviolet irradiation device according to a fifth embodiment of the present invention.

FIGS. 6A and 6B are enlarged views of main parts of an ultraviolet irradiation device according to a sixth embodiment of the present invention.

FIG. 7 is a configuration diagram of a partially cut-away main part of an ultraviolet irradiation device according to a seventh embodiment of the present invention.

FIG. 8 is a configuration diagram of a partially cut-away main part of a conventional portable magnetization device.

FIG. 9 is a configuration diagram of a part of a notch of a conventional ultraviolet irradiation apparatus.

[Explanation of symbols]

 11, 11a, 11b Magnetization device 12, 22 Main body case 13 Electromagnet 14, 24 Power supply device 17a, 17b A pair of probes (contact terminals) 18 Magnetic particle flaw inspection target object 18a Magnetic particle flaw inspection target object inspection portion 21 Ultraviolet irradiation device 23 UV Lamp (ultraviolet light generating bulb) 25 UV mirror (ultraviolet reflector) 28 Diffusing surface 29 Floodlight tube

Claims (10)

[Claims] 1. A power supply device for supplying power to said electromagnet is provided on a magnetizing device main body having a contact terminal that contacts and magnetizes a magnetic particle flaw detection inspection object and an electromagnet that excites the contact terminal. Magnetization device. 2. The magnetizing device according to claim 1, wherein the contact terminal is formed to be flexible. 3. The magnetizing device according to claim 1, wherein an outer surface of the contact terminal other than the contact surface that contacts the inspection object for magnetic particle flaw detection is covered with a magnetic shield. 4. The magnetizing device according to claim 1, wherein the outer plate of the magnetizing device main body is made of plastics. 5. A power supply device for supplying power to the ultraviolet lamp is provided in an ultraviolet irradiation device main body having an ultraviolet lamp for generating ultraviolet light and an ultraviolet irradiation unit for irradiating ultraviolet light from the ultraviolet lamp to a magnetic particle flaw inspection object. An ultraviolet irradiation device, characterized in that: 6. The ultraviolet irradiation apparatus according to claim 5, wherein the ultraviolet irradiation section is formed to be flexible. 7. The ultraviolet irradiation apparatus according to claim 5, wherein a light diffusion section is formed in the ultraviolet irradiation section for irradiating the ultraviolet rays. 8. The ultraviolet irradiation device according to claim 5, wherein an exterior plate of a main body of the ultraviolet irradiation device is made of plastics. 9. An inspection liquid spraying apparatus characterized in that an inspection liquid spraying device main body for magnetic particle inspection for spraying an inspection liquid onto a magnetic particle inspection object is configured to be able to supply the inspection liquid thereto. 10. The magnetizing device according to any one of claims 1 to 3, the ultraviolet irradiation device according to any one of claims 5 to 8, and the test liquid spraying device according to claim 9. A magnetic particle flaw inspection apparatus, comprising: