JP3082824B2 - Fluid penetrant inspection system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner surface of a header of a boiler, in which a highly permeable colored liquid or a liquid emitting fluorescence is applied to the inner surface of the inner surface of the header of the boiler to check the surface to be inspected for defects. Liquid penetrant test (hereinafter referred to as PT).

[0002]

2. Description of the Related Art Conventionally, an inner surface observation device, a polishing device, and the like for visually inspecting an inner surface of a header and inspecting a metal structure.
An etching device, a guide device for inserting these devices through an inspection hole provided at the end of the header and moving the device to an inspection position on the inner surface of the header, and an inspection data acquisition device have been developed.

However, the PT device has not been put into practical use due to various obstacles since the PT device is inserted into the header through an inspection hole formed at the end of the header and operated. That is, in the PT device, the test surface targeting the entire inner surface of the header is applied with a permeable liquid for determining whether or not there is a defect by penetrating into the defective portion. It is necessary to spray a cleaning liquid to wash and remove what has been applied to the normal test surface without defects, and to spray a developing solution to clarify the situation of the defective part where the permeable liquid has penetrated. However, the mechanism for operating these devices is also complicated, and the desired inspection surface can be inspected by passing through the inspection hole provided in the header and inserting the inside of the header. The realization of the inspection device was very difficult.

[0004] Furthermore, spraying of the developer is particularly problematic in the PT device. Conventionally, the developer is charged into a tank placed near the control panel, and the spray nozzle and the tank are connected by a flexible hose. An apparatus for feeding by air pressure has been developed in fields other than the boiler, but there is a problem that the developer is hardened on the inner wall of the hose and the feeding becomes difficult.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided an apparatus for reducing the diameter of a device, passing through an inspection hole, inserting the device into a header, and performing PT of a test surface at a desired position inside the header. It is an object to provide a flaw detection device.

Another object of the present invention is to provide an apparatus for penetrating the inner surface of a liquid through which a permeable liquid can be surely applied only to a required inspection surface by a simple mechanism in addition to the above. I have.

Further, according to the present invention, in addition to the above, a cleaning liquid is sprayed from a short distance to a test surface coated with a permeable liquid to wash away the permeable liquid on a normal test surface in a short time.
An object of the present invention is to provide an apparatus for penetrating the inner surface of a liquid to prevent the developer from coagulating during transfer.

[0008]

SUMMARY OF THE INVENTION Therefore, a head penetration inner surface liquid penetrant inspection apparatus of the present invention is an inspection apparatus for performing PT,
In order to monitor the operation status of the inspection device from a place away from the surface to be subjected to PT or to guide the inspection device to the position of the surface to be inspected, a monitoring camera is housed and opened at the header end. Inspection head consisting of a cylindrical outer cylinder having a diameter that can pass through the inspection hole, and an inspection head that can rotate around the axis of the inspection head so that the inspection head can correspond to the entire circumference inside the header. A swivel mechanism connected to the end, a guide fixed to the other end of the swivel mechanism to move the inspection head in the axial direction in the header so that the inspection head can correspond to the entire length direction in the header. When passing through the rod and the inspection hole, it is housed inside the guide rod and does not protrude to the outside of the outer cylinder, but expands in the header and protrudes to the outside of the outer cylinder, and its end abuts on the inner surface of the header, Legs that hold the inspection head to the shaft core in the header Digits.

Further, according to the present invention, in the apparatus for detecting the penetration of liquid into the inside of a header, the liquid penetrating inspection device is accommodated in an outer cylinder when passing through the inspection hole and does not come out of the outer surface of the outer cylinder. When inspecting the surface, the penetrating liquid impregnated into the pad is stamped out by pressing the pad made of porous material attached to the tip of the link mechanism onto the surface to be inspected by protruding outside the outer cylinder by the link mechanism. A penetrant application device for applying to the surface to be inspected was provided as an inspection device.

Further, the present invention provides the above-described heading inner surface liquid penetrant inspection apparatus, wherein a nozzle arranged in the outer cylinder is disposed so as to face the surface to be inspected in the header, that is, perpendicular to the outer surface of the outer cylinder. A cleaning nozzle for spraying a cleaning liquid onto a surface to be inspected; a developer spray having an injection nozzle arranged orthogonally to the outer surface of the outer cylinder and having the axial direction arranged in parallel with the axis of the outer cylinder and accommodated in the outer cylinder. A cleaning / developing solution spraying device comprising a can and a swinging device for swinging the spray can was provided as an inspection device.

[0011]

According to the present invention, the apparatus for detecting the penetration of liquid into the inner surface of a header is
When performing the PT of the inner side of the header by taking the above-described measures, insert the inspection head into the header through an inspection hole drilled at the end of the header, and then expand the leg to close the tip of the leg to the header. After contacting the inner surface and holding the inspection head on the axis inside the header, the inspection head is moved to the position where the inspection is performed with the guide rod while looking at the inner surface of the header with the monitoring camera. The inspection head is rotated by the turning device while observing the inner surface of the header with the monitoring camera in the direction toward the inner surface to be inspected, and the inspection device is operated to perform PT. According to the device of the present invention, the inspection head housing the inspection device together with the turning device and the guide rod whose outer diameter is equal to or smaller than the diameter of the outer cylinder can freely pass through the inspection hole, and the inspection head is placed in the header. After the is inserted, the operation direction of the inspection tool can be adjusted to the surface to be inspected by the monitoring camera, the guide rod, and the turning device. Further, since the position of the inspection head can be held at the center of the header by the legs, accurate PT can be achieved.

A penetrating liquid is applied such that the inspection tool is projected from the state in which the pad is stored in the outer cylinder by the link mechanism to the outside of the outer cylinder and is brought into direct contact with the surface to be inspected so that the permeate is applied to the surface to be inspected. In addition to the above, in addition to the above, the required amount of permeate can be applied to the required location without scattering to the outside of the surface to be inspected, and the subsequent work of cleaning the permeate is small and the PT work is more efficient. . Further, when passing through the inspection hole, the link mechanism is contracted and can be stored in the outer cylinder, so that passage of the inspection hole is not hindered.

Further, since the cleaning device is provided with a cleaning nozzle arranged perpendicularly to the outer surface of the outer cylinder, the cleaning nozzle is opposed to the surface to be measured by the operation of the swivel device, and the cleaning liquid is supplied to the surface from a short distance. And effective washing of the permeable liquid can be performed. Also equipped with a spray nozzle that can face the surface to be tested in the same way, and a developer spray can housed in the outer cylinder in the same direction as the outer cylinder axis, so that the developer can be sprayed on the surface to be tested. The mechanism is simplified, and the distance from the developing solution storage location to the injection nozzle is shortened, and the problem that the developing solution solidifies on the way and malfunctions are solved.
Further, by providing a swinging device for swinging the developer spray can, the conventional problem of the solidification of the developer in the middle of the pipe can be completely eliminated and good spraying can be performed.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an apparatus for detecting the penetration of a liquid into a head inside according to the present invention. 1 and 2 are diagrams showing a first embodiment of the present apparatus, FIGS. 3 to 5 are views showing a second embodiment, and FIG. 6 is common to the first embodiment and the second embodiment. It is a figure showing attachment to a header.

FIG. 1 shows an operation state of the first embodiment of the present apparatus. FIG. 1 (A) shows a state in which the present apparatus is inserted into an inspection hole of a header, and FIG. FIG. 1C shows a state in which the inspection head A is running by pushing the guide rod to a position where a predetermined inspection is performed, and FIG. 1C shows a state in which the permeated liquid application device as the inspection device is pressed against the inner surface of the header at a predetermined position. The figure is shown. In these figures, A is an inspection head, 01 is a cylindrical outer cylinder that constitutes the inspection head A and has a partly cut-out lower part, and a turning mechanism 02 is shown.
And a monitoring camera 05, and a permeate application device 09 including a permeate application pad 09 and a link mechanism 07 as an inspection device are housed therein.
= Smaller than the inner diameter of the inspection hole 25 of about 70 mm,
Easy passage. Reference numeral 21 denotes a guide rod fixed to the other end of the revolving mechanism 02, one end of which will be described later, connected to the inspection head A. As shown in FIG. 6, just outside the inspection hole 25, the feeding distance is accurately controlled by a guide device 22 provided on a receiving stand 23 attached to the header 24, and the guide rod 21 is pushed to a desired position. The inspection head A is guided until it reaches. As shown in FIG. 1 (A), when the leg 20 passes through the inspection hole 25, it is folded into a storage portion which is recessed in the axial direction of the guide rod 21 as shown in FIG. 1) when the inspection head A is moved to a predetermined position in the header, as shown in FIG.
When operating the penetrant application device as shown in (C),
The sliding portion provided at the distal end of the expanded portion is brought into contact with the inner surface of the header 24 to hold the inspection head A on the axis of the header 24.

FIG. 2 is a view showing details of the inspection head A. In FIG. 2, reference numeral 02 denotes a turning mechanism for rotating the outer cylinder 01 around its longitudinal axis, which incorporates a worm / worm gear and a bearing. Is connected to the inspection head A via a rotating mechanism of When 03 and 04 are pulled with wires for tilting the surveillance camera 05, the surveillance camera 05 tilts. If the amount of pulling is determined in advance in accordance with the inner diameter of the header, the monitoring camera 05 can observe that a pad 09 described below hits the inner surface of the header, and operates the wires 03 and 04 when passing through the inspection hole. Then, the monitoring camera 05 can be held in the outer cylinder 01 while holding the monitoring camera 05 in the same direction as the axis of the outer cylinder 01.

Reference numerals 06 to 09 denote penetrating liquid applicators as inspection apparatuses for applying a penetrating liquid to the surface to be inspected on the inner surface of the header 24.
If the permeating liquid is applied in an unnecessarily large amount in an unnecessarily large area, extra time will be required for cleaning, so only the required amount will be applied to the required area. In the case where the permeation liquid is contained in the stamp 9, the link mechanism 07 whose base end is pivotally connected to the inside of the outer cylinder 01 is operated by the air cylinder 06 to move the pad 9 in a direction perpendicular to the outer surface of the outer cylinder. As described above, the pad 09 is pressed to the position to be inspected, and the speed and the amount of the permeable liquid to be applied can be adjusted by adjusting the pressure of the cylinder 06. The holding plate 08 for mounting the pad 09 is always parallel to the axis of the outer cylinder 01 by the parallel link, so that the pad 09
Can be pressed against the test surface. Although not shown, a tube for supplying a permeating liquid is attached to the holding plate 08, and the permeable liquid can be fed to the holding plate 08 by air pressure from a permeable liquid tank installed near the control panel.

Reference numerals 26 to 31 denote three legs attached to the tip of the inspection head A, which are used when there is a risk that the inspection head may be tilted only by the rear leg 20. 26 is a holder for connection with the inspection head A, 27 is a leg, and three are arranged at a pitch of 120 degrees on the circumference,
A roller 28 is attached at the tip, and a pinion gear 29 is attached at the base.
When the cylinder 31 is extended, the leg 27 expands and comes into contact with the inner surface of the header 24 to prevent the inspection head A from tilting. Of the shaft.

FIG. 3 shows an operation state of the second embodiment of the present apparatus. FIG. 3A shows a state where the present apparatus is inserted into an inspection hole of a header, and FIG. 3B shows an inspection state. FIG. 3 shows a state in which the head B is driven by pushing the guide rod to a predetermined position, and FIG.
(C) shows a diagram in which a cleaning / developing solution spray device as an inspection device is operated at a predetermined position. The only difference from FIG. 1 is the inspection device attached to the inspection head B connected to the turning device, and the description will be omitted with reference to FIG.

FIGS. 4 and 5 show the details of the inspection head B. The components having the same reference numerals as those in FIG. 2 are the same as those in FIG. Note that the three legs attached to the tip of the inspection head A described in FIG. 2 can be naturally applied to this embodiment. The cleaning / developing solution spraying device shown in these figures is inserted into the header after several tens of minutes have passed since the permeating solution was applied in the permeating solution application device shown in the first embodiment.

4 and 5, reference numeral 10 denotes a cleaning nozzle;
Is disposed so as to spray in the diameter direction of the outer cylinder 01 with a drying air spray nozzle. The cleaning nozzle 10 has a nozzle that expands in a slit shape fixed to the outer cylinder 01 constituting the inspection head B, and cleans the permeated liquid on the inner surface of the header that is several hundred mm away. The cleaning liquid is put in a tank near the control panel and sent by air pressure. When spraying the cleaning liquid and the drying air, the nozzles 10 and 11 are set at the set angles and speeds.
1 may be moved, but the entire inspection head B may be rotated and swung by a predetermined angle by the turning device 02. The rotation angle, rotation speed, spray time and spray pressure can be adjusted by a control panel (not shown).

Reference numerals 12 to 17 denote mechanisms for spraying a developer. Press the injection nozzle 13 of the developer spray can 12 into the pressing tool 1
Pressing at 4 sprays the developer 33.
The developer spray can 12 is made of a small-diameter can having a diameter equal to or less than 検 査 of the diameter of the inspection hole.
Is housed inside. Reference numeral 15 denotes an air cylinder for moving the pressing tool 14. When the air cylinder 15 is extended, the pressing tool 14 presses the spray can nozzle 13 by a lever mechanism. The developer spray 33 is difficult to spray unless the developer spray can 12 is moved from time to time.
6 and a swing device for shaking the developer spray can 12 by extending and contracting the swing cylinder 18.
The spring 17 acts when the swing cylinder 18 contracts. In addition, the pressing time and the swinging time of the spray nozzle can be adjusted.

The head A shown in the first embodiment
Can be used for cleaning by cleaning the flow path of the liquid and using a cleaning liquid instead of the penetrating liquid.

Each inspection head is provided with a set of a small CCD camera, a lighting and turning mechanism, and a guide support mechanism for holding the inspection head body at the axis of the header.

[0025]

As described above, the apparatus for detecting the penetration of liquid into the inside of a header according to the present invention is inserted into the inside of the header by the structure shown in the claims, and is used to inspect the inside of the header to the axis where the surface to be detected is located. This makes it possible to provide a device that can perform the PT by moving the PT, thereby contributing to improving the reliability of the header.

Further, since a necessary amount of the penetrating liquid can be applied to a required portion of the surface to be inspected, the labor for cleaning is reduced, the work efficiency is improved, and the cleaning effect is improved by installing the cleaning nozzle near the surface to be inspected. Speed up efficiency. Further, the problem of coagulation of the developing solution is eliminated, and more favorable spraying of the developing solution becomes possible, and in addition to the above effects, the reliability of the inspection result can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing an operation state of a first embodiment of a head penetration inner surface liquid penetration testing device of the present invention;

FIG. 2 is a diagram showing an internal mechanism of the inspection head A of FIG. 1,

FIG. 3 is a diagram showing an operation state of a second embodiment of the present apparatus;

4 is a diagram showing an internal mechanism of the inspection head B in FIG. 3,

FIG. 5 is a sectional view taken along the line AA in FIG. 4;

FIG. 6 is a view showing an example of a header installation of the header inner surface liquid permeation detection device of FIG.

[Explanation of symbols]

 01 outer cylinder 02 turning mechanism 03,04 wire 05 surveillance camera 06 air cylinder 07 link 08 holding plate 09 pat 10 cleaning nozzle 11 drying nozzle 12 developer spray can 13 spray can nozzle 14 pressing tool 15 pressing cylinder 16 slide 17 Spring 18 Swing cylinder 19 Missing 20 Leg 21 Guide rod 22 Guide device 23 Cradle 24 Heading body 25 Inspection hole 26 Holder 27 Leg 28 Roller 29 Pinion gear 30 Rack gear 31 Cylinder 32 Cleaning liquid 33 Developing liquid

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tokuyoshi Tsuji 1-2, Kuuemori 1 Nakayama, Atsumi-cho, Atsumi-cho, Aichi Prefecture Inside Chubu Electric Power Co., Inc. Atsumi Thermal Power Station (72) Inventor Sakata Mine Port of Nagoya City Port, Aichi Prefecture 3-72 Oe-cho, Chubu Electric Power Company Thermal Power Center (72) Inventor Hiromasa Kamei 2-1-1 Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Akihiko Kimura Arai Town, Takasago City, Hyogo Prefecture 2-1-1 Niihama, Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Tomikane Saita 2-1-1, Niihama, Arai-machi, Takasago-shi, Hyogo Pref. Inside Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Hiroshi Hanazawa Kobe, Inventor Hyogo-ku Wadasaki-cho, 1 chome, Mitsubishi Heavy Industries, Ltd. in the Kobe Shipyard & Machinery Works (58) investigated the field (Int.Cl. ^7, D Name) G01N 21/91 G01N 21/954

Claims (3)

(57) [Claims] 1. A liquid permeation test for inserting a penetrating liquid into an inner surface of a header through an inspection hole formed at a header end of a boiler, applying a permeating liquid to a surface to be inspected on the inner surface of the header, and inspecting the surface to be inspected for defects. In the inspection device, the outside is constituted by a cylindrical outer cylinder having a smaller diameter than the inspection hole, and an inspection device for performing liquid penetration inspection when passing through the inspection hole and a monitoring camera for monitoring the status of the inspection device in the outer cylinder. An inspection head adapted to be housed therein, a turning mechanism for rotating the inspection head connected to one end thereof around the axis of the inspection head, and the inspection head fixed to the other end of the turning mechanism for moving the inspection head on the inner surface of the header. A guide rod that moves in the axial direction, and a leg that expands from a state in which the inspection head is stored in a storage portion defined in the guide rod so as to hold the inspection head on the inner shaft portion of the header. Special feature inside the header Liquid penetration inspection equipment. 2. The inspection apparatus according to claim 1, further comprising: a link mechanism having a base end pivotally mounted in the outer cylinder and extending in a direction perpendicular to the outer cylinder surface; and a pad attached to the tip of the link mechanism and impregnated with a permeable liquid. 2. The apparatus according to claim 1, wherein the apparatus is a penetrant application apparatus that applies the penetrant by pressing the pad against the surface to be inspected. 3. The cleaning device according to claim 1, wherein the inspection device is provided in the outer cylinder at right angles to the outer cylinder surface, the washing nozzle being configured to wash the permeate applied to the test surface, and the outer cylinder being parallel to the outer cylinder axis. A washing / developing solution sprayer having an injection nozzle disposed therein and arranged orthogonally to the outer cylinder surface, comprising a developer spray can and a swinging device for swinging the developer spray can. 2. The apparatus according to claim 1, wherein the apparatus is a device for detecting the penetration of liquid into the inner surface of a header.