JP2002340757A - Surface inspection apparatus of underwater structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that no apparatus is available for performing corrosion and replica sampling in water, and that a mechanism for supplying corrosion liquid and a mechanism for discharging the corrosion liquid are needed. SOLUTION: A corrosion process is added to the prestage of a replica sampling method considering execution in water, thus sampling replicas for examining the damaged state of a surface accurately and surely with the structure in water as a target. Especially in the presence of defects, the positions of the defects and the relationship with metal organizations can be examined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection for damage occurrence of all structures which are used in water and may cause damage to the surface thereof. Is used when As a specific example, it can be used to inspect the surface properties of a structure in a reactor pressure vessel. Further, it can be used not only in water but also in other environments such as air.

[0002]

2. Description of the Related Art As a device for inspecting the state of a structure by corroding the surface of the structure and collecting a replica of the surface,
There is a technique disclosed in Japanese Patent Application No. 10-161754. By using the same apparatus, it is possible to supply a corrosive liquid and then discharge it, and then supply a replica material to collect a replica.

[0003]

Problems to be Solved by the Invention Japanese Patent Application No. Hei 10-1617
There is a technique disclosed in Japanese Patent Publication No. 54-54. The device was not devised to allow remote installation underwater. Further, since a mechanism for discharging the supplied corrosion liquid is required, the process becomes complicated.

[0004]

Means for Solving the Problems To solve the above-mentioned problems, a container having at least one open side is filled with a space member such as a sponge or a soft member such as a soft rubber, and the container is further provided with a container. Both the nozzle for supplying the corrosive liquid and the nozzle for supplying the replica material are inserted into the inside of the container, and the container is pressed against the surface of the structure to be inspected, thereby pressing the gap-like member or the soft member on the surface. After applying a corrosive liquid first to corrode the surface, the replica material extruded from the replica material supply nozzle is pooled and solidified between the surface of the structure and the gap or soft member. It is.

Further, in order to supply the corrosive liquid in the corrosive liquid storage tank from the corrosive liquid supply nozzle, and to supply the replica material in the replica material storage tank from the replica material supply nozzle, the corrosive liquid is supplied to the container or the container. A corrosive liquid extruding mechanism and a replica material extruding mechanism of, for example, an air cylinder type are provided in the vicinity.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. Everything shown in both figures is underwater. The sub arm a3 is connected to the main arm 1 via the vane type air actuator a2. High-pressure air is sent to the vane-type air actuator a2 through the high-pressure air tube a4, and the rotation angle of the sub arm a3 is controlled by controlling the high-pressure air. Secondary arm a 3
Is connected to a sub arm b 6 via an air cylinder 5. The air cylinder 5 has a high-pressure air tube b 7
High-pressure air is sent through the auxiliary arm b6 to change the position of the sub arm b6. A vane-type air actuator b8 is attached to the tip of the sub arm b6, and is connected to the support 9 via the vane-type air actuator b8. By sending controlled high pressure air through the high pressure air tube c to the vane air actuator b8, the vane air actuator b8 rotates, thereby rotating the strut 9. A container composed of a container part a12, a container part b13, and a container part c14 is attached to the column 9. The container part 12 pushes the container part 13 and the container part 14 via the spring 15. At the end of the container member 14, a container skirt 16 is provided. The container component 14 is filled with a gap-like elastic member 17. The corrosive liquid supply nozzle 31 and the replica material supply nozzle 18 penetrate substantially at the center position of the gap-shaped elastic member.
A corrosive liquid storage tank 32 and a corrosive liquid pushing air actuator 33 are connected, and a replica material supply tank 18 is connected to a replica material storing tank 19 and a replica material pushing air actuator 20. An underwater camera 23 and a ring light 24 are attached to the support 9. By illuminating with a ring light 24 and remotely observing the surroundings with an underwater camera 23, a site to be inspected is searched for, and rotation of the container skirt 16 is controlled by controlling the vane air actuator a2, the air cylinder 5, and the vane air actuator b8. Direction position and vertical
The horizontal position is set arbitrarily, and the container skirt 16 is brought into close contact with the structure 22 as shown in FIG. The corrosive liquid storage tank 32 is filled with a corrosive liquid such as dilute ferric chloride. By sending controlled high-pressure air through the high-pressure air tube e 30, the corrosive liquid in the corrosive liquid storage tank 32 is pushed out into the corrosive liquid supply nozzle 31 by the corrosive liquid push-out air actuator 33, and the tip of the corrosive liquid supply nozzle 31 Then, the corrosive liquid flows out between the structure 22 and the gap-like elastic member 17. At this time, the inspection target surface of the structure 22 is corroded, and a metal structure appears. Thereafter, by sending controlled high-pressure air through the high-pressure air tube d21, the replica material in the replica material storage tank 19 is pushed into the replica material supply nozzle 18 by the replica material pushing air actuator 20, and the replica material supply nozzle From the tip of 18, the replica material is the structure 22 and the gap-like elastic member 17
Extrude the replica material between. FIG. 2 shows a state in which the replica 34 between the structure 22 and the void-like elastic member 17 is solidified. As shown in FIG. 2, it is assumed that the amount of the replica material is sufficiently supplied to the entire surface of the structure 22 inside the container skirt portion 16. Since the container skirt 16 and the structure 22 are in close contact, the replica 34
The corrosive liquid 35 extruded remains in the container as shown in FIG. Further, the replica 26 is sufficiently entangled with the gap-shaped elastic member 17, and when the operation of storing the sub-arms 3 and 6 in the main arm 1 is performed, the replica 26 is reliably collected.

FIG. 3 is a diagram showing a configuration of an entire apparatus for collecting a replica of an underwater structure. Structure container 42
Inside is filled with water. FIG. 3 shows an embodiment in which a replica is sampled after corrosion for inspecting the inner surface of the structure container 42. First, a working floor 49 is installed on the flange of the structural body container 42. The guide plate 43 is lowered from the work floor 49 into the structure container 42. A plurality of guide plates 43 are prepared and connected at the guide plate connection flanges 44 using the guide plate connection bolts 45.
3 is lowered until it reaches the bottom of the structure container 42. An electromagnet 46 is attached to the tip of the guide plate 43, and the tip of the guide plate 43 can be fixed at an arbitrary position on the bottom of the structural container 42. The on / off state of the electromagnet is set using the power supply and the control device 53. Above the guide plate 43, a guide plate receiving member 48 is provided to guide the guide plate 43 so as not to be displaced in the lateral direction. The main arm 1 is lowered into the water of the structure container 42 by driving on the guide rail 47. A compressor 50 is provided on the working floor 49, and compressed air is sent from the compressor 50 to the manifold 51. Six air solenoid valves 52 are attached to the six outlet sides of the manifold 51. By operating the power supply and control device 53, when the air electromagnetic valve 52 is opened, the compressed air flows to the vane air actuator 2, the air cylinder 5, the vane air actuator b8, the replica collection container a40, and the replica collection container b41. Sent. Each air solenoid valve 52
Can be independently opened and closed, and the vane air actuator 2, the air cylinder 5, the vane air actuator b8, and the replica collection container 40 can be independently driven. The underwater camera 23 is first installed so that the tip side of the replica collection container 40 can be imaged. The image of the underwater camera 23 is observed on the monitor 54. While observing the image of the underwater camera 23 on the monitor 54, the vane air actuator 2,
Air cylinder 5, vane type air actuator b 8
Is appropriately driven to bring the replica collection side of the replica collection container a 40 closer to the surface of the structure to be replica-collected and pressed. When the pressed state of the replica collection container 40 against the replica collection surface is appropriate, the surface is corroded and the replica is collected by supplying compressed air to the replica collection container 40. After replica collection, the replica collection mechanisms are housed in the main arm 1 and pulled up. At this time, the replica is a hollow elastic member 1 in the replica collection container.
7 is in close contact with the necessary and sufficient strength, so that the replica can be reliably collected without falling off from the replica collection container. The collected replica is observed with a microscope or the like, and the presence of a defect is inspected simultaneously with the metal structure.

[0008]

According to the present invention, it is possible to accurately and reliably collect a replica of an underwater structure for investigating a surface damage state. In particular, when a defect exists, it is possible to examine the relationship between the position of the defect and the metal structure.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a replica collection device.

FIG. 2 is a basic configuration diagram of a replica collection device.

FIG. 3 is an overall configuration diagram of a replica collection device.

[Explanation of symbols]

1… Main arm, 2… Vane type air actuator, 3…
Secondary arm a, 4 ... High pressure air tube a, 5 ... Air cylinder, 6 ... Secondary arm b, 7 ... High pressure air tube b, 8 ...
Vane-type pneumatic actuators b, 9 ... columns a, 10 ... columns b, 11 ... high-pressure air tubes c, 12 ... container parts a,
13 container part b, 14 container part c, 15 spring, 1
6: container skirt, 17: void-like elastic member, 18: replica material supply nozzle, 19: replica material storage tank,
20 ... Replica material pushing air actuator, 21
... high-pressure air tube d, 22 ... structure, 23 ... underwater camera, 24 ... ring light, 30 ... high-pressure air tube e,
31 ... corrosion liquid supply nozzle, 32 ... corrosion liquid storage tank, 3
3 ... Corrosion liquid pushing air actuator, 34 ... Replica, 35 ... Corrosion liquid, 40 ... Replica collection container, 42 ... Structure container, 43 ... Guide plate, 44 ... Guide plate connection flange, 45 ... Guide plate connection bolt, 46 ... Electromagnet, 47 ...
Guide rail, 48: Guide plate receiving member, 49: Working floor, 50: Compressor, 51: Manifold, 52
... electromagnetic valve for air, 53 ... power supply and control device, 54 ...
monitor.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiroshi Sakata 502 Kandachi-cho, Tsuchiura-shi, Ibaraki F-term in Machinery Research Laboratory, Hitachi, Ltd. (reference) 2G052 AA11 AD32 FD03 HC42 JA09 2G075 CA04 DA14 DA16 EA02 FA12 FC03 FC06 FC13 FC18 GA35

Claims (4)

[Claims] At least one surface of a container having at least one open surface is provided with a gap-shaped elastic member, a replica material supply nozzle, and a corrosive liquid supply nozzle, and the open surface of the container is used as a surface to be inspected such as a structure. Pressing, supplying the corrosive liquid supplied from the corrosive liquid supply nozzle between the gap-shaped elastic member and the inspection target surface such as a structure in a state where the tip of the corrosive liquid supply nozzle is near the inspection target surface, The feature is that the replica material supplied from the replica material supply nozzle is supplied between the gap-shaped elastic member and the replica sampling surface of the structure etc. with the tip of the replica material supply nozzle near the inspection target surface. Inspection equipment for underwater structures. 2. The apparatus for inspecting a surface of an underwater structure according to claim 1, further comprising a storage section for storing the corrosive liquid and a mechanism for pushing out the corrosive liquid from a remotely controllable storage section inside or outside the container. A replica material supply unit of a defect replica collection device for underwater structures, comprising a replica material storage unit and a mechanism for pushing out a replica material from a remotely operable storage unit. 3. A lid is provided between the corrosive liquid storage section of the corrosive liquid supply section and the corrosive liquid supply nozzle, and the mounting strength of the lid is reduced by the corrosive liquid supply pressure from the corrosive liquid storage section to the corrosive liquid supply nozzle. A surface inspection apparatus for underwater structures, characterized in that the lid is broken at the start of the supply of the corrosive liquid and the corrosive liquid flows into the corrosive liquid supply nozzle. 4. The surface inspection apparatus for underwater structures according to claim 2, wherein the air cylinder is used as an extruding mechanism.