JPH0744388Y2 - Automatic X-ray inspection system for welded joints - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of an automatic X-ray inspection apparatus for welded joints of a side plate of a cylindrical tank.

[0002]

2. Description of the Related Art A cylindrical tank side plate is suspended by side plates so as to sandwich the inside and outside of the side plate. There is known an X-ray inspection apparatus for a welded joint in which an X-ray generator corresponding to one side and a film setting means corresponding to the other side of the welded joint are arranged on the other side of the main body.
(See, for example, JP-A-57-50646)

Since the film setting means in the X-ray inspection apparatus is to manually attach the film to the welded joint by a worker in a lead gondola that does not transmit X-rays, the workability is poor and labor-saving measures are taken. Is not taken into consideration, and there is an inconvenience that the worker must solve means for preventing exposure.

As means for solving such a problem, an X-ray generator corresponding to a welded joint is provided on one side of a portal-shaped main body, and a welded joint is provided on the other side of the main body. There has been proposed an X-ray automatic inspection device in which a film setting means, that is, a film which is put in a cartridge and can be automatically fed is attached via a film holder.
(See, for example, Japanese Utility Model Laid-Open No. 1-167650)

According to such a device, it is recognized that unmanned and automated X-ray photography can be achieved, and the problems of the above-mentioned prior art can be solved, but the film setting means is a camera type of automatic winding type. Therefore, it is necessary to protect the camera body so that the unphotographed film and the photographed film are not irradiated with X-rays. Further, although the film currently used has a rectangular dry plate structure, there remains a technical problem that a cartridge type film capable of automatic winding must be newly developed.

An object of the present invention is to provide an automatic X-ray inspection apparatus capable of automatically and continuously photographing unattended by using a commercially available film as the welded joint of the tank side plate.

[0007]

The structure of the present invention, which solves the problems of the prior art, is a gate which is suspended by the side plates so as to sandwich the inside and outside of the tank side plates of a cylindrical tank, and which is self-propelled using the upper edge of the side plates as a guide. A welded joint in which an X-ray generator corresponding to one side of the welded joint of the side plate is disposed on one side of the main body formed in the mold, and a film setting means corresponding to the other side of the welded joint is disposed on the other side of the main body. In the X-ray automatic inspection apparatus of the above-mentioned part, a housing having an X-ray blocking structure is formed in the main body on the side where the film setting means is arranged, a magazine case for the film is arranged in the upper part of the housing, and a lower part of the inside of the housing. On the other hand, a collecting section for the photographed film having an openable and closable collecting port is formed, while the magazine case, the film setting means, and the film passing means for circulating the collecting section are provided. That.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the embodiments of the present invention will be described with reference to the drawings. 1 is a side view of the device of the present invention, FIG. 2 is a front view of a film setting means side main body, FIG. 3 is a front view of an X-ray generator side main body, FIG. 4 is a partially cutaway side view of the film setting means, and FIG. 6 is a partially cutaway plan view of an essential part of the film setting means, FIG.
a and b are explanatory views of the state where the film in the magazine case is taken out, FIG. 7 is a vertical cross-sectional side view of the state where the film is set in the weld joint, and FIG. 8 is a state in which the film allocation tape is attached in parallel along the weld joint. FIG. 9 is a perspective view of a main part showing the correspondence between the film allocating tape and the detection sensor,
10 is a side view of the film mark mounting frame, FIG. 11 is a plan view of the film mark mounting frame, and FIG. 12 is an explanatory diagram showing the relationship between the shooting order and the film number.

An outline of the device of the present invention will be described with reference to FIGS. 1b is a tank side plate 1a of an already installed cylindrical tank
A side plate welded on the side plate 1b, which is formed in a gate shape so as to sandwich the inside and outside of the side plate 1b and which is self-propelled with the upper edge of the side plate 1b as a guide.
A body 2 consisting of is suspended. As shown in FIGS. 2 and 3, reference numeral 3 is a drive wheel driven by a traverse drive device 5 installed on the upper floor plate 4 of the main body 2 and capable of switching manually, and 6 are driven wheels. is there.

As shown in FIG. 2, a gondola 7 is provided to be movable up and down on a structure 2a arranged inside the side plate 1b. This gondola 7 is connected via a chain 8 to a chain block 9 suspended on the floor plate 4, for example,
It can be raised or lowered manually or electrically. The gondola 7 has a film feeder device 1 for two horizontal welding joints.
0 are mounted in parallel through the film width. 1 in the figure
Reference numeral 1 is a guide wheel. Further, as shown in FIG. 3, a gondola 12 is provided to be movable up and down on the structure 2b arranged outside the side plate 1a. The gondola 12 is connected to a winch 14 installed on the floor plate 4 via a suspension wire 13. The gondola 12 has two X-ray generators 15 corresponding to the film feeder device 10.
It is mounted so that it can rotate 0 °. Reference numeral 16 in the figure denotes a guide wheel. In the figure, reference numerals 17 and 18 denote guide rollers which are provided at the lower ends of the structures 2a and 2b, and one or both of which can be adjusted for horizontal movement.
By pressing 18 onto the inner and outer side surfaces of the side plate 1b, the main body 2 can smoothly traverse without swinging with respect to the side plate 1b. Further, in FIG. 1, 19 is a hanging scaffold, and 20 is a bracket scaffold.

Next, the details of the film feeder device 10 will be described with reference to FIGS. Reference numeral 21 is a machine frame, and a housing 22 having an X-ray blocking structure surrounded by a lead material is formed in a lower portion of the machine frame 21. A magazine case 24 accommodating a large number of films 23 is provided in a horizontal posture in the upper part of the housing 22, and a spiral rib 25 provided in the magazine case 24 causes the group of films 23 to move in the side plate 1b direction. The leading edge of the film 23 is biased, and the side edge of the most advanced film 23 is locked by the retaining piece 24a formed by bending at the end of the magazine case 24 so that it does not automatically pop out by the pressing force of the spiral spring 25. I am doing it. Also, the magazine case 24
A collecting portion 26 for the photographed film 23 is formed under the collecting film 26, and a collecting port 28 having an opening / closing lid 27 is formed on the rear wall portion of the housing 22 corresponding to the collecting portion 26.

On the upper machine casing 21 of the housing 22,
An air cylinder 29 having a horizontal posture whose axis is substantially perpendicular to the plate surface of the side plate 1b is arranged. At the end of the rod 30 of the air cylinder 29, a vacuum pad 31 of the same size and size as the film 23 is provided. It is installed. The vacuum pad 31 is moved in the direction of the side plate 1b by the action of the air cylinder 29 so that it can come close to the plate surface of the side plate 1b. Reference numeral 31a is a pressing force cushioning material.

Reference numeral 32 is a screw rod standing upright between the upper portion of the machine frame 21 and the middle of the housing 22, and 33 is a guide rod standing upright in parallel with the screw rod 32. Mating element 34
And a fitting member 35 is loosely fitted to the guide rod 33, and the fitting members 34 and 35 are connected to each other by a connecting rod 36. This connecting rod 36
A film suction pad 38 that is horizontally reciprocated by an air cylinder 37 is attached to the central portion of the. A drive motor 40 is connected to an upper end of the screw rod 32 via a gear reduction mechanism 39, and the film suction pad 38 is configured to move up and down via the screw rod 32 when the drive motor 40 rotates forward and backward. There is. The film suction pad 38 includes the magazine case 24, the collecting unit 26, and the vacuum pad 3.
It is possible to visit these sites by stopping at the sites corresponding to 1. The film suction pad 3
As means for stopping 8 for each part, a limit switch provided in the circuit of the drive motor 40 is turned on,
An OFF means (not shown), a control mechanism (not shown) that teaches the stop position in advance, or the like is used. Further, the vacuum pad 31, the film suction pad 3
8 is a vacuum means such as a compressor (not shown)
Are naturally connected.

The top wall of the housing 22 is provided with an opening 41 through which the fitting elements 34, 35, the connecting rod 36, and the film suction pad 38 pass. This opening 4
When 1 is left as it is, X-rays are radiated into the housing 22 through the opening 41. Therefore, a movable lid 42 for X-ray shielding, which is inserted through the screw rod 32 and the guide rod 33, is provided so as to be vertically movable. An X-ray shielding cylinder 43, which is freely fitted to the screw rod 32 and the guide rod 33, is provided on the lower surface of the movable lid 42. The length of the cylinder 43 is the film suction pad. Three
The length is such that the movable lid 42 seals the opening 41 when the 8 stops at a portion corresponding to the magazine case 24. The moving lid 42 is configured to be raised by the ascending film suction pad 38, and when the film suction pad 38 is lowered, is naturally lowered by its own weight. It should be noted that the magazine case 24 and the vacuum pad 31 of one of the film feeder devices 10 corresponding to the X-ray generator 15 which can be rotated by 90 ° so that an X-ray inspection of the welded joint in the vertical direction can be carried out can be performed by 90 °. It is configured to be rotatable.

Next, the related mechanism of the X-ray generator 15 will be described with reference to FIGS. The gondola 1
The two X-ray generators 15 are provided on the side plates 1a and 1b of the two.
Corresponding to the above, a flexible window frame 45 in which a relatively wide and horizontally long rubber plate 44 is fixed with screws is provided. One end of one end of a rod 48 that horizontally moves along a pipe 47 by the action of an air cylinder 46 that is horizontally supported by the gondola 12 is connected to both ends of the window frame 45 and to the upper and lower parts of the central part. The rod 48 between the window frame 45 and the gondola 12 is provided with a spiral spring 49 for pressing the window frame 45, that is, the rubber plate 44 against the outer surface of the side plates 1a and 1b. The front surface of the rubber plate 44 corresponds to the film 23 of the two vacuum pads 31.
Also, a film mark sheet 50 provided with a construction number, a tank number, a plate thickness and a permeable meter is releasably attached, and these permeable meter and film mark are photographed on the film 23 by X-ray. is there.

In preparation for the X-ray inspection, as shown in FIGS. 8 and 9, an effective film length (for example, 350 mm) is provided on the upper portion of the side plate 1a, that is, on the outer side surface of the side plate 1a close to the welded joint. ) A film allocating tape 52 with stop marks 51 for each length is attached over the entire length of the welded joint, a film number (not shown) is provided on the film allocating tape 52 surface between the stop marks 51, and this film number is attached to the film 23. It was shot. 5 in FIG.
3 is a sensor provided on the gondola 12 for detecting the stop mark 51. When the sensor 53 detects the stop mark 51, the main body 2 is stopped.

[0017]

[Description of Operation] The drive wheel 3 is driven by the traverse drive device 5 to move the main body 2 along the side plate 1b, and the sensor 53 causes the stop mark 5 of the film allocating tape 52 as shown in FIG.
When 1 is detected, the transverse drive device 5 is stopped by the control means, that is, the main body 2 is stopped at a fixed position. At this time, the X-ray generator 15 is at a position corresponding to the vacuum pad 31 of the film feeder device 10. The air cylinder 37 of the film suction pad 38 at the position shown in FIG. 4 is actuated, and the film suction pad 38 advances and is pressed against the film 23 at the leading edge as shown in FIG. 6a, and at the same time sucks the film 23. . Next, as shown in FIG. 6B, the film suction pad 38 is retracted by the action of the air cylinder 37, and the film 23 is taken out from the magazine case 24. When the drive motor 40 is actuated in response to this signal and the screw rod 32 is rotated via the gear reduction mechanism 39, the film suction pad 38 is acted on by the engagement with the fitting 34 screwed onto the screw rod 32 to open the opening 41 of the housing 22. Rise while passing through. At this time, the movable lid 42 is attached to the film suction pad 38.
Accompany the rise of.

When the film suction pad 38 rises to a position corresponding to the vacuum pad 31 as shown by the phantom line in FIG. 4, the drive motor 40 is stopped by the detection means. Next, the air cylinder 37 is operated and the film suction pad 38 moves forward to press and set the film 23 sucked and held on the front surface of the vacuum pad 31. By this signal, the suction action of the vacuum pad 31 is actuated, and at the same time, the suction action of the film suction pad 38 is released, and the film 23 is moved to the vacuum pad 31. Then, the air cylinder 37 operates again and the film suction pad 38 returns to the original position. The drive motor 40 is driven in the opposite direction by this signal, and the film suction pad 3
8 descends. At this time, the moving lid 42 is lowered by its own weight, the film suction pad 38 is housed in the housing 22, and the opening 41 of the housing 22 is closed and sealed by the moving lid 42. Next, the air cylinder 29 is actuated to move the vacuum pad 31 adsorbing and holding the film 23 forward, and as shown in FIG. 7, the film 23 is pressed and set to the welded joint portion on the inner surface of the side plate.

Almost at the same time as the above-mentioned operation, 3 on the gondola 12 side
The air cylinder 46 of the book is operated, and the rubber plate 44 having the film mark sheet 50 attached to the front surface is pressed and set to the welded joint portion on the outer surface side of the side plate. In this way, both X-ray generators 15 are simultaneously actuated by the signal that the setting of the film 23 and the setting of the rubber plate 44 are completed, and the photographing is finished. When the photographing is finished, the rubber plate 44 is retracted by the action of the air cylinder 46 and stands by for the next process.

On the other hand, when the photographing is completed, the air cylinder 2
9 operates and the vacuum pad 31 moves backward. And
In response to this signal, the drive motor 40 rotates in the normal direction again, the film suction pad 38 rises by the same action as described above, stops at the position corresponding to the vacuum pad 31, and the film suction pad 38 is actuated by the operation of the air cylinder 37. Moves forward and is pressed by the film 23 sucked and held by the vacuum pad 31. Next, the film suction holding action of the vacuum pad 31 is released, and at the same time, the suction action of the film suction pad 38 works, so that the film 2 which has been photographed has been taken.
3 is the vacuum pad 31 to the film suction pad 38
Be moved to. Drive motor 40 receives this signal
Is driven in the reverse direction, the film suction pad 38 descends, and when it descends to the position shown by the phantom line in FIG. 4, the drive motor 40 stops. By this stop signal, the suction action of the film suction pad 38 is released, and the photographed film 23 is left as it is and collected in the collecting section 26 as shown in the figure. When the film 23 is left as it is, the film suction pad 38 is stopped at a position corresponding to the magazine case 24 by the operation of the drive motor 40, as shown by the solid line in FIG. 23 is adsorbed and held, and rises. During this time, the main body 2 is traversed by the traverse driving device 5 and repeatedly performs the same operation continuously.
The photographed film 23 collected in the collecting unit 26 is collected from the collecting port 28 by opening the opening / closing lid 27 as appropriate, and the magazine case 24 of the unphotographed film 23 is also replaced appropriately. In the above embodiment, the X-ray generator 15 is attached to the gondola 12 on the outside of the side plates 1a and 1b, and the gondola 7 on the inside is attached.
Although the film feeder device 10 is provided in the above, it is not limited to that of the embodiment because the film can be inspected in reverse.

Next, the photographing procedure will be described with reference to FIG. “A” indicates a shooting order, and “b” indicates a film number. Numbers 1 and 3 corresponding to shooting sequence 1 and 1
The film 2 is photographed, and the main body 2 traverses the film length, for example, 350 mm, and photographs the films of Nos. 2 and 4 corresponding to the photographing order 2 and 2. Next, the main body 2 is traversed by a distance of 1050 mm corresponding to three films, and the films of Nos. 5 and 7 corresponding to the shooting sequences 3 and 3 are shot. Efficient photographing is performed by repeating this cycle.

[0022]

As described above, according to the configuration of the present invention, the following effects can be obtained. (A) Needless to say, it is possible not only to automate the photographing in the X-ray inspection of the welded joint portion of the tank side plate and also to greatly save labor, but (b) to supply the photographing portion by the X-ray generator and the non-photographed film. Section and the collection section of the film that has been photographed are completely separated,
Especially, the collection section of unphotographed film and photographed film is X
Since it is provided in the housing of the line blocking structure, the X-ray exposure countermeasure of the film can be simply and surely realized, and the commercially available film can be used as it is, and the economical effect is great.

[Brief description of drawings]

FIG. 1 is a side view of the device of the present invention.

FIG. 2 is a front view of a film setting means side main body.

FIG. 3 is a front view of an X-ray generator side main body.

FIG. 4 is a partially cutaway side view of the film setting means.

FIG. 5 is a partially cutaway plan view of an essential part of the film setting means.

6A and 6B are explanatory views showing a state where the film in the magazine case is taken out.

FIG. 7 is a vertical cross-sectional side view showing a state in which a film is set on a welded joint.

FIG. 8 is a front view of a state in which film allocation tapes are attached in parallel along the welded joint.

FIG. 9 is a perspective view of essential parts showing the correspondence between the film allocating tape and the detection sensor.

FIG. 10 is a side view of a film mark attachment frame.

FIG. 11 is a plan view of a film mark attachment frame.

FIG. 12 is an explanatory diagram showing a relationship between a shooting order and a film number.

[Explanation of symbols]

 1a Side plate 1b Side plate 2 Main body 5 Drive device 7 Gondola 10 Film feeder device 12 Gondola 15 X-ray generator 22 Housing 23 Film 24 Magazine case 26 Collecting part 27 Open / close lid 28 Collecting port 29 Air cylinder 31 Vacuum pad 32 Screw rod 33 Guide rod 34 Fitting 35 Fitting 37 Air Cylinder 38 Film Adsorption Pad 40 Drive Motor 41 Opening 42 Moving Lid 44 Rubber Plate 46 Air Cylinder 50 Film Mark Sheet 51 Stop Mark 52 Film Allocation Tape 53 Sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Akatsu 118 Hidetsuka, Noda-shi, Chiba Kawashita Inspection Service Co., Ltd. Noda Works (56) References JP-A-57-50646 (JP, A) -167650 (JP, U) Actual public Sho 52-15273 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A welded joint of the side plate is attached to one side of a main body which is suspended on the side plate so as to sandwich the inside and the outside of the tank side plate of the cylindrical tank and which is self-propelled with the upper edge of the side plate as a guide. The X-ray generator corresponding to one side and the film setting means corresponding to the other side of the welded joint are arranged on the other side of the main body, and the film setting means is arranged in the X-ray automatic inspection device for the welded joint. A housing with an X-ray blocking structure is formed in the main body on the side, a magazine case for the film is arranged in the upper part of the housing, and a collection portion for the film that has been photographed is provided with an openable / closable collection opening in the lower part of the housing. On the other hand, on the other hand, an automatic X-ray inspection apparatus for a welded joint portion is provided, which is provided with the magazine case, the film setting means, and the film transfer means for circulating the collecting portion.