JPS62257050A - Apparatus for visually inspecting narrow part - Google Patents

Abstract

PURPOSE:To suppress damage to the min. degree without using a fiberscope having special material quality even under a high temp. and high radiation condition, by guiding the fiberscope up to an object to be inspected by a guide tube at the time of inspection. CONSTITUTION:At the time of non-inspection, a fiberscope 11 is preliminarily wound around a take-up reel 16. At the time of inspection, an operator sends the fiberscope 11 in a guide tube 12 by the operation of an operation panel 14 or the handle operation of a send-out apparatus 13 and pushes out the same up to a position wherein an object 15 to be inspected is seen. The rotary mirror 15a of the fiberscope 11 is rotated while a monitor television 19 is watched and the fiberscope 11 is adjusted so as to be capable of observing the object 15 to be inspected to perform inspection.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a visual inspection device 1 for narrow spaces, for example, in a nuclear power plant, where a narrow space is inspected under adverse environments such as K, high temperature, and high radiation.
This invention relates to a narrow space visual inspection device for visually inspecting the area.

[Conventional technology]

Conventionally, as this type of device, a fiberscope is installed in advance at the necessary inspection point 1, such as the device described in Japanese Patent Application Publication No. 011-1972-201≠/3 shown in Fig. 1. Inspections were then carried out by using a television camera to capture the images obtained by this fiberscope.

The procedure will be explained next using an example of an inspection system in a containment facility of a nuclear power plant shown in FIG.

In the figure, code (1) is the containment vessel, (core a), (2b
) is the inspection target, (Ja), (, yb) are the fiberscopes installed to inspect these, (su is the fiberscope (Ja), (jb) is the containment vessel (1)
Penetration to get outside, (evening) is a TV camera, (mu) is a monitor TV.

In this system, the tip is inspected (2a) (, 2b)
K Close and facing fiberscopes (3a) (3
The proximal end of b) is guided outside the containment vessel (1) via the penetration (μ), and the image of the proximal end is captured by the TV camera (5).
) and visually inspect it on a monitor television (A).

In this way, equipment that is sensitive to high temperatures and radiation, such as television cameras, can be installed in a place with a good environment. Necessary inspections will be carried out.

[Problem that the invention seeks to solve]

Conventional fiberscope inspection equipment.

As mentioned above, it is necessary to install the fiberscope to the area to be inspected in advance, so it is necessary to construct the fiberscope etc. with a material that can withstand high temperature and high radiation areas, and 1. When there are many inspection targets, it is necessary to deploy a large number of fiberscopes, resulting in an expensive system.

This invention was developed to solve the above-mentioned problems, even under high temperature and high radiation conditions.

The purpose of the present invention is to provide a visual inspection device for a narrow space that can be inspected with a single fiber scope even when there are a large number of inspection objects without using a special fiber scope.

[Means for solving problems]

The narrow area visual inspection device according to the present invention includes a fiberscope, a guide tube that guides the fiberscope to an inspection target, and a delivery device that feeds and pushes the fiberscope into the guide tube.

[Effect]

In the narrow area visual inspection device according to the present invention, only when performing one inspection, the fiberscope is guided by the guide tube by the delivery device and sent to the target inspection target position, and the fiberscope is sent to the target inspection target position. Visually inspect the image at a predetermined location.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment thereof.

In Fig. 7, the symbol (//) Haffeiskov,
(/ko) is a guide tube installed to guide the fiberscope (//) to the inspection target, (/3
) connects the fiberscope (//) to the guide tube (//
;), the operation panel that operates the fiberscope (//) and the sending device t(/,?), (/ri) is the object of inspection.

The fiberscope (//) is a flexible and bendable multi-pixel image guide that transmits an image captured by an objective lens (not shown) at the tip to the end. Also,
This device uses a rotating mirror (//a) at the tip, which is adjusted to the direction in which the inspection target can be viewed by remote control from the control panel (c0).

The guide tube (/J) can be used with a fiberscope (//
) is installed in the plant to guide the fiberscope (//) to the inspection target.

The delivery device [ff (/,?) is a fiberscope (//
) feeds into the guide tube (/ko).1For example, it consists of a take-up reel (/meng) and a feed roller (/7),
Rotate in sync. These brain movements
It may be possible to perform remote control from the feeder, or it may be possible to directly feed the feeder by manually operating a handle at the feeder unit.

The end of the fiberscope (//) is connected to a television camera (/S) via an eye lens (not shown), and the image captured by the fiberscope (//) is connected to the television camera (/L). 3. Note that the delivery device (
/3) It is desirable to minimize damage to electronic and optical components caused by high temperatures and radiation by installing it in a place with as good an environment as possible.

The control panel (/l) is the TV camera (/l);
A monitor TV (/9) to monitor the image, a transmission device (f C/3), and an operation display (c/3) to remotely control the rotating mirror (//a) of the Fabric scope (l/), etc. We are prepared. Note that the operation panel (C0) is usually installed in a place with a good environment, such as a central control room.

Next, the operation of this embodiment will be explained.

When this narrow area visual inspection device is not performing a single inspection, the fiber scope (//) is placed on the take-up reel (/4). And when performing one inspection.

The operator operates the operation panel (Ha0 or the sending device (/J
) by operating the handle of the fiberscope (/l)
Push out the guide tube (/J) to the position where you can see the inspection target, and then place it on the monitor TV (L?).
While looking at the image, rotate the rotating mirror (//a) of the fiberscope (//), adjust it so that the target inspection target can be observed, and perform the inspection.

As described above, the operator can safely perform a visual inspection of a narrow space by remote control from a place with a good environment such as a central control room.

In addition, in the above explanation, fiberscope (//)
The image was taken with a TV camera (7G) and observed on a monitor TV (/D), but a fiberscope (/D) was used.
/), and although the explanation of lighting is omitted, it is recommended to use a fiberscope with a light guide and provide a light source on the sending device side. .

In addition, in the above embodiment, the tip of the fiberscope protrudes from the guide tube.

Although it was assumed that the inspection would be carried out by pushing it out, it is not limited to this.

As shown in Figure 1, a transparent part (12a) made of a transparent material such as glass is provided in the middle or the whole of the guide tube (2), and the feeding is stopped in the middle of the guide tube for inspection. You can also do it like this.

Also, by installing a plurality of guide tubes (/) and providing a switching device (λ/) as shown in FIG. 3, for example, by providing a delivery device (/, 7) K.

It is also possible to switch the sending route and send the fiberscope (/l) to a desired inspection method Ff+ for inspection. The switching shown in Figure 1! (,2/) is.

This is an example of a rotary switching device, in which the proximal ends of the guide tubes (/2b) (/2C) (12d) (/koe) to be switched are arranged in a circumferential manner, and the one-rotation machine (ko2) VC One rotation of the basket (
Rotate the guide tube <, a> in the cage (3) once by rotating the guide tube (1) - (
12e).

Note that such a switch (, 2/) is not limited to the above configuration, and may have any configuration.

By using the above method, you can freely perform visual inspections of a large number of inspection targets by simply installing multiple guide tubes (/2) without increasing the number of fiberscopes. Mooru.

〔Effect of the invention〕

As described above, according to the present invention, the fiberscope is guided to the inspection target by the guide tube during visual pressure inspection, so that visual inspection can be performed freely even in narrow spaces. Since it can be rolled up when not being inspected, damage to inspection equipment such as fiber scopes can be minimized even when passing through high temperature and high radiation areas. There is no need to construct the fiberscope using special materials, and as a result, an inexpensive and highly reliable visual inspection device for narrow spaces can be obtained.

[Brief explanation of drawings]

Fig. 1 is a system configuration diagram of a narrow space visual inspection device according to an embodiment of the present invention, Fig. 2 is an external view of a guide tube showing a modification of the guide tube shown in Fig. 1, and Fig. 3 is the same as Fig. 1. FIG. 1 is a perspective view of an external appearance of an example of a switch provided, and FIG. 2 is a schematic configuration diagram of a conventional narrow space visual inspection device. In the figure, (/l)... fiberscope. (/2) (/2b) (12c) (/2d) (/2e)・
・Guide tube. (lcomi)...Transparent part, (/3)...Delivery device, (/
...Control panel, (/l)...TV camera, (
/? )...Monitor TV, (20)...Operation display, (,2/)...Switcher. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] (1) It is equipped with a fiberscope, a guide tube installed to guide the fiberscope to the inspection point that requires inspection, and a delivery device that feeds and pushes the fiberscope into the guide tube. Features: Visual inspection device for narrow spaces. (2) The narrow area visual inspection device according to claim 1, wherein the guide tube is provided with a transparent portion in the middle thereof. (3) A plurality of guide tubes are provided, and the delivery device is provided with a switch for selecting and switching the guide tube from which the fiberscope is delivered. A visual inspection device for narrow spaces.