JP2587098Y2 - Inspection device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection apparatus which can be used even under high temperature and under radiation.

[0002]

2. Description of the Related Art In nuclear facilities, inspections are regularly performed to ensure the soundness of plant equipment and the like. In this inspection, for equipment (containers, pipes) in a high temperature (for example, about 350 ° C.) and radiation environment by a furnace, after the furnace is stopped, the temperature is lowered to about room temperature, and then the inspection is prepared. The shield (heat insulation layer) surrounding the target part is peeled off, and an inspection device is brought into that part.

Further, in a conventional inspection apparatus employing an ultrasonic flaw detection method, as shown in FIGS. 6A and 6B, a sensor 101 has a transmission unit 102 and a reception unit 103 integrated with each other. Things were adopted. In the figure, reference numeral 104 denotes a test material (target base material), and reference numeral 105 denotes a scratch.

[0004]

[Problem to be Solved by the Invention] The above-mentioned stripping work of the shield prior to the inspection needs to be performed not only at the inspection point but also over a wide area around the periphery in order to secure the equipment access, installation, or shelter. is there. After the inspection, the shield is attached again.

[0005] Many of these operations are required to be performed during a predetermined period, and the operations are extremely difficult. Further, in order to improve the operation rate of the plant, it is required to further shorten the stop period.

[0006]

[0007]

[Means for Solving the Problems ] To solve the above-mentioned problems.
For this purpose, the inspection device according to the present invention is installed inside the wall.
An outer frame to be movably supported by the outer frame.
Perpendicular to the moving direction of the inner frame
Supported by the inner frame so that it can move in
A moving table, and a test portion of the wall provided on the moving table.
An inspection tool to be inspected, provided on the outer frame,
Winding that is connected to the frame and moves the inner frame
A transmission means and an axial center along the moving direction of the inner frame;
Rotatably provided on the outer frame so as to face
The slide shaft is fitted to the slide shaft and
It can rotate integrally with the ride shaft and the slide shaft
A gear movable along the axial direction of the
And a rack meshing with the gear, and an outer side of the wall body.
And an inner frame drive communicating with the winding transmission means.
An operating motor, and the slide motor disposed outside the wall body.
A movable table drive motor that communicates with the
It is characterized by.

[0008]

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the inspection apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic side view of an inspection apparatus according to one embodiment as viewed from the side, FIG. 2 shows a schematic view of the apparatus body viewed from a plane, and FIG. A cross section is shown in FIG. 4 as viewed from arrows BB in FIG.

In FIG. 1, reference numeral 1 denotes a heat insulating layer which forms a wall of a structure, and inside thereof, devices (containers, containers,
(Including piping, etc.). The apparatus main body 2 is arranged on the surface portion of the inspection object inside the heat insulating layer 1 and is supported by the heat insulating layer 1. The support of the apparatus main body 2 to the heat insulating layer 1 is provided by connecting pipes 3, 4, and the like.

The apparatus main body 2 has the rectangular frame-shaped outer frame 5 supported on the heat insulating layer 1 by the connecting pipes 3 and 4 as described above. An inner frame 6 is located inside the outer frame 5, and rollers 7 supported on both side surfaces of the inner frame 6 are rollably fitted into grooves 8 formed on both inner side surfaces of the outer frame 5. That is, the inner frame 6 is supported by the outer frame 5,
In addition, the outer frame 5 can be moved in the longitudinal direction (X-axis direction).

A driving sprocket 9 is supported on one side of the outer frame 5 in the longitudinal direction, and a driven sprocket 10 is supported on the other side, and a chain 11
Are connected to both ends of the inner frame 6 in the X-axis direction.
Such a driving sprocket 9 and a driven sprocket 1
0, the chain 11 and the like, in this embodiment,
Constitutes a stage.

On the other hand, a drive unit 12 is provided outside the heat insulating layer 1, and an output shaft 1 of a motor 13 which is a motor for driving an inner frame incorporated in the drive unit 12.
4 is connected to the drive sprocket 9 via gears 15 and 16 and a cylindrical shaft 17 passed through the connecting pipe 3. Therefore, by driving the motor 13, the output shaft 14,
The drive sprocket 9 is driven and rotated via the gears 15 and 16 and the cylindrical shaft 17, whereby the chain 11 is moved, whereby the inner frame 6 is moved in the X-axis direction inside the outer frame 5.

Two guide grooves 18 are formed in the inner frame 6 in a direction perpendicular to the X-axis direction (Y-axis direction).
Rollers 20 supported on both sides of the moving table 19 are rollably fitted into these guide grooves 18. A rack 21 parallel to the Y-axis direction is integrally mounted on the upper surface of the moving table 19.

On the other hand, a slide shaft 22 is passed across the rack 21 in a direction parallel to the X-axis direction, and both ends thereof are rotatably supported by the outer frame 5. The slide shaft 22 has a square cross section except for both ends. On the slide shaft 22, a gear 24 having a roller 23 that contacts each surface thereof is supported,
The gear 24 is meshed with the rack 21.
That is, even if the inner frame 6 moves in the X-axis direction,
When the roller 23 rolls on each surface of the slide shaft 22, the meshing between the gear 24 and the rack 21 is supported.

A bevel gear 59 is provided at one end of the slide shaft 22.
Is fixed. On the other hand, the motor 40 wherein the outer drive unit 12 of the heat insulating layer 1, a moving table drive motor
The output shaft 41 is connected to the bevel gear 30 that meshes with the bevel gear 59 via gears 42 , 43 and a shaft 44 passed through the communication pipe 4.

Accordingly, the driving of the motor 40 causes the output shaft
41 , gears 42 , 43 , shaft 44 , bevel gears 30 , 59
, The slide shaft 22 rotates via the roller 23, and the gear 2 is integrated with the slide shaft 22 via the roller 23 in the rotational direction.
4 is rotated. Since the gear 24 meshes with the rack 21 as described above, the rotation of the gear 24 causes the moving table 19 to move together with the rack 21 in the Y-axis direction.

A gear 31 is rotatably supported below the movable table 19. A slide shaft 32 parallel to the Y-axis direction penetrates the gear 31, and both ends thereof are rotatably supported by the inner frame 6. Like the slide shaft 22, the slide shaft 32 has a square cross section except for both ends. The gear 31 supports a roller 33 that contacts each surface of the slide shaft 32. That is, the gear 31 is slidable in the axial direction with the slide shaft 32, but is integrated with the rotation direction.

A bevel gear 34 is integrally attached to one end of the slide shaft 32.
The bevel gear 35 meshing with the inner frame 6 is rotatably supported by the inner frame 6. The bevel gear 35 has a sprocket 36
Are united. At both ends in the X-axis direction of the outer frame 5, a driving sprocket 37 and a driven sprocket 38 are provided concentrically and independently of the sprockets 9, 10, and a chain 39 is provided between these sprockets 37, 38.
And the chain 39 is also engaged with the sprocket 36.

On the other hand, a driving unit outside the heat insulating layer 1
12 has a motor 25 incorporated therein, and its output shaft
26 is connected to the driving sprocket 37 via gears 27 and 28 and a shaft 29 passed through the cylindrical shaft 17. Therefore, the gears 27 , 2 are driven by the motor 25.
8. The drive sprocket 37 is driven and rotated via the shaft 29 and the like, whereby the chain 39 is circulated. By the movement of the chain 39, the sprocket 36 meshing with the chain 39 rotates, the slide shaft 32 rotates through the bevel gears 34 and 35, and the gear 31 integrated in the rotational direction through the slide shaft 32 and the roller 33. Rotated.

The gear 4 meshing with the gear 31 is provided on the moving table 19.
A rotating shaft 46 integral with the supporting member 5 is rotatably supported. A bevel gear 47 is attached to an end of the rotating shaft 46. The moving table 19 has a feed screw shaft 4 parallel to the X-axis direction.
8 is rotatably supported, and a bevel gear 49 is attached to one end portion thereof so as to mesh with the bevel gear 47.

The feed screw shaft 48 is formed with a right-hand thread 48a and a left-hand thread 48b.
0 and 51 are screwed. Carriage 50, 51
, A slide shaft 52 supported by the movable base 19 is slidably penetrated. One ends of arms 53 and 54 are connected to the carriages 50 and 51, respectively.
A transmitting unit 55 and a receiving unit 56 constituting the ultrasonic sensor 60 are attached to the other ends of the units 3 and 54.

Therefore, the gear 31 is rotated as described above,
In addition, when the feed screw shaft 48 is rotated through the bevel gears 47 and 49, the carriages 50 and 51 move in a direction approaching or moving away from each other, and the distance between the transmission unit 55 and the reception unit 56 is adjusted. . Note that a transmitting unit 55 and a receiving unit 56 are attached to each of the arms 53 and 54, respectively.
A spring force for elastically pressing the spring is applied by a spring 58.

As described above, in this inspection apparatus, the main body of the apparatus which does not hinder operation even at a high temperature is provided in the high temperature range as it is, and the drive unit 12 which is affected by heat is provided outside the heat insulating layer 1. It was provided.

Next, the operation of the inspection apparatus will be described. The inner frame 6 moves in the X-axis direction by driving the motor 13 for moving in the X-axis direction. At this time, the roller 23 of the gear 24 rolls on the slide shaft 22, and the engagement between the gear 24 and the rack 21 is not affected. In addition, the movable base 19 moves in the Y-axis direction by driving the motor 40 for moving in the Y-axis direction. At this time, the roller 33 of the gear 31 rolls on the slide shaft 32, and the engagement between the gear 31 and the gear 45 is not affected.

Therefore, the driving of the motors 13 and 40 is controlled, and the ultrasonic flaw detection sensor 60 on the moving table 19 is moved
Flaw detection can be performed by moving in the X-axis direction and the Y-axis direction along.

Further, by driving the motor 25 to move the transmitting unit 55 and the receiving unit 56 of the ultrasonic sensor 60 toward and away from each other, as shown in FIGS. It can be detected quantitatively. The driving and stopping of the motors 13, 25, 40 are all performed by remote control.

In the above embodiment, the moving table 19 is moved in the XY directions. However, if the moving table 19 can be moved in the X-axis direction and the Z-axis direction (vertical direction) and in the Y-axis direction and the Z-axis direction, The present invention can be applied to flaw detection of a test portion on the side in the vertical direction. Furthermore, if it is possible to move in the XYZ axis directions, three-dimensional flaw detection becomes possible.

In the above embodiment, the rollers 23 and 33 are provided.
Gears 24, 31 are fitted to prismatic slide shafts 22, 23.
But with, for example, a spline groove
Sliding along the spline groove on the slide shaft
It is also possible to attach a gear that fits
You. Further, in the above-described embodiment, the sprocket
Ket 9, 10 and chain 11 were used.
Use pulleys, ropes, etc. instead of members 9-11.
Both are possible.

The above embodiment is an example in which the apparatus main body 2 is placed under high heat. However, the present invention can be similarly applied under other atmospheres such as radiation.

[0031]

[Effect of the Invention] In the inspection device according to the present invention, the winding transmission
Allow the inner frame to move in steps, slide shafts, teeth
The mobile platform can be moved by car, rack, etc.
The inner frame drive motor on the outer frame
Without mounting the motor for driving the gantry on the inner frame,
It can be arranged outside. As a result, inspections can be performed even during operation, and there is no need to wait for the temperature to drop as in the past, which improves the efficiency of inspection work and eliminates the need to stop plant operation. The rate is improved. Further, the work of removing the heat insulating layer, which is conventionally required, becomes unnecessary, so that the work load is reduced.

[0032]

[Brief description of the drawings]

FIG. 1 is a schematic side view of an inspection device according to one embodiment.

FIG. 2 is a schematic plan view of an apparatus main body.

FIG. 3 is a sectional view taken on line AA of FIG. 2;

FIG. 4 is a view taken in the direction of arrows BB in FIG. 3;

FIG. 5 is an explanatory diagram of a flaw detection situation by an ultrasonic sensor in one embodiment.

FIG. 6 is an explanatory diagram of a flaw detection situation using a conventional ultrasonic sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat insulation layer 2 Device main body 3, 4 Communication pipe 5 Outer frame 6 Inner frame 9 Drive sprocket 10 Driven sprocket 11 Chain 12 Drive unit 13 Motor 19 Moving table 21 Rack 22 Slide shaft 23 Roller 24 Gear 25 Motor 31 Gear 32 Slide shaft 33 Roller 36 Sprocket 39 Chain 40 Motor 45 Gear 46 Rotating shaft 47,49 Bevel gear 48 Feed screw shaft 50,51 Carriage 55 Transmitter 56 Receiver 60 Ultrasonic sensor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-105060 (JP, A) JP-A-54-10284 (JP, A) JP-A-57-7507 (JP, A) JP-A-54-50 156592 (JP, A) JP-A-61-44319 (JP, A) JP-A-62-67446 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01N 29/00-29 / 28 G01N 27/72-27/90 G21C 17/00-17/14

Claims (1)

(57) [Scope of request for utility model registration] 1. An outer frame disposed inside a wall, an inner frame movably supported by the outer frame, and movable in a direction orthogonal to a moving direction of the inner frame.
The moving table supported by the inner frame as described above, and a tester provided on the moving table for inspecting a test portion of the wall body.
An inspection tool , provided on the outer frame, and connected to the inner frame.
A winding transmission means for moving the inner frame, and an axial direction along the moving direction of the inner frame.
The slide provided rotatably on the outer frame
Shaft and the slide shaft, and rotate integrally with the slide shaft.
As well as along the axis of the slide shaft.
A movable gear, a rack provided on the movable base and meshing with the gear, and disposed outside the wall to communicate with the winding transmission means.
An inner frame driving motor, which is disposed outside the wall and communicates with the slide shaft.
An inspection apparatus comprising a moving table drive motor .