JP4590715B2 - Method for inserting film into tubular member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for inserting an X-ray film at an arbitrary position in a tubular member formed of a nonmagnetic material in nondestructive inspection using X-rays.
[0002]
[Prior art]
As a nondestructive inspection using X-rays, there is one in which an X-ray film is disposed behind a flaw detection site, X-rays are irradiated from the surface side to the site, and a transmitted X-ray image is taken.
[0003]
[Problems to be solved by the invention]
However, in such a non-destructive inspection, it may be difficult to arrange the X-ray film when photographing a complicated shape.
[0004]
For example, when the welded portion 11 of the pipe diffuser 10 of the compressor of the jet engine shown in FIG. 1 is photographed by X-rays, an X-ray film is inserted into the pipe diffuser 11 and X-rays are irradiated from the outside. Is preferred. However, since it is extremely difficult to correctly insert the X-ray film at an arbitrary position inside the narrow tubular portion, the X-ray film has to be placed outside the pipe, and as a result, the inspection is highly accurate. There was a problem that could not be done.
[0005]
This invention is made | formed in view of the said problem, Comprising: The X-ray film for X-ray nondestructive inspection can be easily inserted in the arbitrary positions in a narrow tubular member. It aims at providing the film insertion method.
[0006]
[Means for Solving the Problems]
The method for inserting a film into the tubular member of the present invention that achieves the above object is to insert an X-ray film for X-ray nondestructive inspection at an arbitrary position in a bent tubular member formed of a nonmagnetic material. The X-ray film is formed in a shape and size that can be inserted into the tubular member, and the driven magnets are fixed on the back surfaces of both end portions of the X-ray film, and the X-ray film is While being inserted into the inlet portion of the tubular member, the driven magnet is attracted to the driven magnet from the outside sandwiching the tube wall of the tubular member, and the driven magnet is moved along the outer surface of the tubular member to follow the driven magnet. Then, the X-ray film is moved and inserted at an arbitrary position.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0008]
FIG. 1 shows a pipe diffuser 10 of a compressor of a jet engine as an object to be subjected to X-ray flaw detection using a film insertion method inside a tubular member according to the present invention. The pipe diffuser of the compressor of the illustrated jet engine is formed of a non-magnetic nickel-based alloy in order to increase the temperature by being located on the outer peripheral side of the combustor.
[0009]
An X-ray film is inserted into a predetermined position inside the bent tubular pipe diffuser for X-ray flaw detection of the welded portion 11 of the pipe diffuser 10.
[0010]
First, as shown in FIG. 2, the X-ray film 20 is formed in a shape that can be stably inserted into the pipe diffuser 10 in a size as required, and a driven magnet is provided on the back side of both ends in the longitudinal direction. The film side magnet 21 is fixed with an adhesive. The film-side magnet 21 may have any shape, but the film-side surface preferably corresponds to the curved inner surface of the pipe diffuser 10 to be attracted.
[0011]
And the X-ray film 20 provided with such a film side magnet 21 is inserted into the inside of the opening of the pipe diffuser 10 and corresponds to the film side magnet 21 as shown in FIG. An operation magnet 30 as an operation magnet is positioned outside the wall surface of the pipe diffuser 10 to attract them.
[0012]
As a result, the X-ray film 20 is positioned along the inner surface of the pipe diffuser 10, and the operation magnet 30 cannot be removed from the outer surface of the pipe diffuser 10. In this state, the operation magnet 30 is slid along the outer surface of the pipe diffuser 10. By performing the moving operation, the inside of the pipe diffuser 10 can be moved along the inner surface.
[0013]
Thereafter, the X-ray film 20 can be positioned at an arbitrary position inside the pipe diffuser by sliding the operation magnet 30 along the outer surface of the pipe diffuser 10 to a position where the line film 20 should be inserted. is there. When the operation magnet 30 and the film-side magnet 21 are separated from each other during the moving operation, the force for adsorbing the operation magnet 30 to the outer surface of the pipe diffuser 10 disappears.
[0014]
【The invention's effect】
As described above, according to the method for inserting a film into the tubular member according to the present invention, the X-ray film is formed into a shape and size that can be inserted into the tubular member, and both ends of the X-ray film are formed. The driven magnet is fixed on the back side of the part , and the X-ray film is inserted into the inlet of the tubular member, and the operating magnet is attracted to the driven magnet from the outside sandwiching the tube wall of the tubular member. The X-ray film can be easily and surely inserted at an arbitrary position in a narrow tubular member by moving the X-ray film to an arbitrary position by following the moving magnet along the moving operation . is there.
[Brief description of the drawings]
FIG. 1 is a view showing a pipe diffuser of a compressor of a jet engine that performs X-ray flaw detection using a film insertion method inside a tubular member according to the present invention.
FIG. 2 is a view showing an X-ray film.
FIG. 3 is a conceptual diagram showing an X-ray film insertion method.
[Explanation of symbols]
10 Pipe diffuser (tubular member)
20 X-ray film 21 Film magnet (driven magnet)
30 Operation magnet (operation magnet)

Claims (1)

A method of inserting an X-ray film for non-destructive X-ray inspection at an arbitrary position in a bent tubular member formed of a non-magnetic material,
An X-ray film is formed in a shape and size that can be inserted into the tubular member, and driven magnets are fixed to the back surfaces of both ends of the X-ray film, and the X-ray film is attached to the inlet portion of the tubular member. The X-ray film is inserted into the driven magnet so that the driven magnet is attracted from the outside sandwiching the tube wall of the tubular member, and the driven magnet is moved along the outer surface of the tubular member to follow the driven magnet. The film is inserted into the tubular member, and the film is inserted into an arbitrary position.

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