JPS59134187A - Device for inspecting inside of vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Relating to a device for inspecting.

Conventionally, when inspecting the inside of a pressure vessel, etc., a worker enters the vessel through a manhole, etc. and visually inspects it directly.However, when inspecting an atomic couplant, etc., the inside of the vessel has a high radiation #l child rate. Because of this, it is impossible for people to enter, so inspection equipment is used for inspection.

However, conventional inspection devices are large and expensive, making them unsuitable for use as inspection devices.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an inspection device that has a simple structure, low cost, and high reliability.

The structure of the present invention that achieves such an object includes a fixture that can be attached to the opening of a container, a claw sliding member that is slidably inserted into the fixture, and a sliding member that is inserted into the opening of the container, and that when the fixture is attached to the container, the fixture is attached to the opening of the container. It is characterized by comprising an attachment provided at the distal end of the sliding member located inside the slider, and an operating means provided at the proximal end of the sliding member for operating the attachment. , the present invention will be explained in detail based on embodiments shown in the drawings.

The inspection device according to the present invention has a simple structure in which the driving means of the wk-operating part are all manually operated, thereby improving operability and achieving reductions in size, weight, and cost.

FIG. 1 is a sectional view of the inspection device according to Akira Fuken installed on the steam drum of the ATR Fuken power plant. A fixture 2 is bolted to an opening of a steam drum 1 as a container, a manhole with a tab 9. The fixture 2 has a plurality of mounting holes and a through hole 3 for bolting;
Furthermore, a hollow shaft 5 as a sliding member is slidably and rotatably inserted into the through hole 3 of the fixture 2, which is provided with a viewing window 23 for viewing the internal chamber of the steam drum 1. Even if the hollow shaft 5 slides or rotates, it can cover the inside and outside of the steam drum 1 and r light beams, so that it is LL! ! 1
The middle part 2 of the foot part 2 is thick. A hanger 9A6 for lifting the inspection device with a crane or the like is attached to this fixture 2, and a bearing 7 is provided at the end of the hanger 6 to prevent the deflection of the hollow shaft 5 from increasing. In other words, the hollow shaft 5 is
By supporting the hollow shaft 5, the hollow shaft 5 is prevented from becoming loose.

In this embodiment, a television camera 4 is attached to the tip of the inner wall 4115 located inside the steam drum l.
is provided. As shown in Fig. 2, which is an enlarged cross-sectional view of A in Fig. A nozzle 12 is provided as an operating means for operating the warehouse, and a swing 9 of the television camera 4 is provided.
A scale 16 is engraved to indicate the angle. Inside the hollow shaft 5, a drive @9 connected to a nozzle 12 is rotatably provided, and near the tip of the hollow shaft 5, the sliding shaft 9 has a universal joint (10!). ! It is connected to the worm 11 via i-. The worm 11 is engaged with a 9000mm wheel 22 that is integrated with the oscillating shaft 8, and when the TV camera 4 is turned on the oscillating shaft 8.
? Rotate as. This TV camera 4 is 9 ohm Ll
A light 13 is attached to the television camera 4 to illuminate the inside of the steam drum l, and the television camera 4 and the light rotate together with the television camera 4. )1
As shown in FIG. 3, the cable 14 and the power line 15 for No. 3 are each led to the outside of the steam drum 1 through the inside of the hollow shaft 5. In addition, in order to facilitate the sliding and rotating operations of the hollow shaft 5, there is a handle at the inner wall @ 50 at the base end.
7, a scale 18 indicating the amount of sliding MJJJ is carved in the longitudinal direction of the hollow shaft 5, and a scale 19 indicating the amount of rotation is carved on the end face of the cover 20 that covers the bearing 7, The cover 20 is provided with a stopper 21 for fixing the shaft 5 at an arbitrary position. In this embodiment, the horizontal stroke due to the sliding of the hollow shaft 5 is 1700 cm.
The swing range of the TV camera 4 is Fi1800, and by rotating the hollow shaft 5, the swing range is 36.
The procedure for using such an inspection device will be explained. First, after inserting the tip of the hollow shaft 5 with the TV camera 4 and light 13i set into the steam drum 1, attach the fixing device 2'ft steam drum 147CIgj using the bolts in the manhole part.

Next, hold the handle 17 and slide or rotate the hollow shaft 5, move the TV camera 4 to the desired location while looking at the monitor TV (not shown) connected to the TV camera 4, and press the stopper 21. This is to fix the hollow shaft 5. While watching the TV monitor or looking inside the steam drum 10 through the viewing window 23, turn the handle 12 and rotate the TV camera 4t - oscillating axis 9 - 8t - around the center. and direct the television camera 4 toward the object.

Inspect the inside of the steam tram 1 as described above.

In this example, a TV camera is attached as an attachment, but a commercially available 1. T, V, fiber scope, small still camera, etc. g: You can attach a simple magic node as an attachment and view the steam drum V3t- from the viewing window.
You can also perform tasks such as collecting samples by operating it while looking at it.

Are the above examples? As explained with the drawings, the inspection device according to the present invention has a simple structure in which a sliding member with an attachment at the tip is slidably attached to a fixture, and all operations are performed manually. So, with a small birth, JG! It is easy to handle and inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the container interior inspection device according to the present invention attached to a steam drum, Fig. 2 is an enlarged partial cross-sectional view of section A in Fig. 1, and Fig. 3 is the same as Fig. 1. FIG. In the drawing, 1 is a steam drum, 2 is a fixture, 3 is a through hole, 4 is a television camera, 5 is a central shaft, 8 is a 9-shaft oscillation shaft, and 12.17 is a handle. Patent applicant: Mitsubishi Heavy Industries, Ltd.; Patent attorney, Shibu Mitsuishi (and one other person)

Claims (1)

[Claims] a fixture that can be attached to an opening of a container, a sliding member that is slidably inserted through the fixture, and a tip end of the sliding member that is located inside the container when the fixture is attached to the container. An inspection device for the inside of a container, characterized in that it is comprised of an attachment provided at the base of the sliding member, and an operating means provided at the base end of the sliding member for operating the attachment.