JPS6345556A - Ultrasonic measuring instrument for moving material - Google Patents

Abstract

PURPOSE:To measure an object with an ultrasonic wave during its movement by bringing an ultrasonic wave oscillator and an ultrasonic wave receiver into contact with the peripheral surface of the moving body in rotation and rotating them along with the peripheral surface. CONSTITUTION:Elevation members 4 and 5 are mounted on a column 3 fixed by a container 1 such as a drum can which is mounted so as to rotate on a support plate 2. Further, shafts 8 and 9 are mounted on the elevation members 4 and 5 so that arcuate guide members 6 and 7 move to and back away from the container 1 freely. Both ends of a guide rod 13 where a moving member 14 is fitted loosely are fixed to support members 11 and 12 fixed to both ends of the internal surface 6a of the guide member 6, and the ultrasonic wave oscillator 17 is fixed to the movable member 14. A movable member 18 where the ultrasonic wave receiver 19 is fixed is mounted on the other guide member 7. Consequently, the guide members 6 and 7 while moved forth toward the container to bring the ultrasonic wave oscillator 17 and ultrasonic wave receiver 19 into contact with the container 1 are rotatable together with the container 1, and the object in the container 1 can be inspected.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an apparatus for measuring a substance contained in a cylindrical storage container and rotating and moving together with the storage container using ultrasonic waves.

``Prior Art'' At nuclear power plants, various radioactive wastes are temporarily stored together with concrete in cylindrical storage containers such as drum cans. For quality control of this storage container, it is necessary to externally inspect the density, filling degree, and uniformity of the stored substance within the storage container.

Conventional inspection of storage containers involves applying an ultrasonic oscillator to a suitable location on the circumference of the storage container to emit ultrasonic waves, and then placing an ultrasonic receiver in contact with the opposite circumferential surface to receive the ultrasonic waves. This is done by

This ultrasonic detection operation must be performed at any height while changing the detection position on the circumference of the storage container, so once the detection of a certain position is completed, the ultrasonic oscillator and receiver must be manually operated again. The method used was to either move the storage container to a different position on the storage container and perform the inspection, or to place the storage container on a rotatable support plate, rotate it as appropriate, and then perform the inspection in a stationary state. There was a problem in that inspections required a long time and a great deal of effort.

"Means for Solving the Problems" In the present invention, the time required for the ultrasonic oscillator and the detection element of the receiver to contact the storage container, that is, the propagation time of the ultrasonic wave in the storage container and the detection element Within a short period of time or longer, including the time required for measurement system noise to disappear due to attachment/detachment, etc.
By bringing the detection element into contact with the circumferential surface of the rotating storage container and making it rotatable together with the circumference, creating a relative rest time between the storage container and the detection element, the above-mentioned This solves the problem.

"Example" Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 and 2, various radioactive wastes (not shown) are stored in a vertically cylindrical storage container 1. As shown in FIGS. This storage container 1 is placed on a support plate 2 which is rotated in the direction of arrow 10 by an appropriate driving source, and is rotated in the same direction.

1 fixedly installed at a symmetrical position on the side of the storage container 1
Elevating members 4.5 are attached to the paired columns 3 so as to be synchronously raised and lowered by a drive source (not shown). The glazes 8.9 respectively fixed to the outer surfaces of the pair of arc-shaped guide members 6.7 are attached to the elevating members 4.5 so that the guide members 6.7 can move forward and backward with respect to the storage container l. It is installed.

In FIG. 2, the inner surface 6a of the guide member 6 is formed to be equidistant from the outer peripheral surface 1a of the container 1 when the guide member 6 is moving forward relative to the container 1.

Both ends of a guide rod 13, which is curved along the inner surface 6a, are fixed to support members 11.12, which are fixed to both ends of the inner surface 6a of the guide member 6, respectively. The movable member 14 loosely fitted to the guide rod 13 is capable of reciprocating along the inner surface 6a of the guide member 6 while rolling a roller 15 mounted on the rear thereof against the inner surface 6a of the guide member 6. The movable member 14 has both ends connected to the movable member 14 and the support member 1.
Due to the elasticity of tension springs 16 and 1, respectively,
In the opposite direction to the rotation direction of the storage container 1, that is, the support member 1
1 direction. Storage container 1 for movable member 14
An ultrasonic oscillator 17 is fixed to the side.

A similar movable member 18 is attached to the other guide member 7, and the ultrasonic oscillator 17 is mounted on the side of the storage container 1.
An ultrasonic receiver 19 paired with the ultrasonic receiver 19 is fixedly attached.

When the guide member 6 moves forward in the direction of arrow 21 while the ultrasonic oscillator 17 is separated from the storage container 1, the ultrasonic oscillator 17 comes into contact with the outer peripheral surface 1a of the storage container 1 and moves in the direction of the arrow 10. rotate together.

The other guide member 7 also moves forward toward the storage container 1 in synchronization with the guide member 6, and the ultrasonic receiver 19 moves toward the ultrasonic oscillator 17.
At the same time, it comes into contact with the outer peripheral surface 1a of the storage container 1 and rotates in the direction of the arrow 10.

The ultrasonic oscillator 17 and the ultrasonic receiver 19 are in the storage container 1.
The contents such as waste in the container 1 are inspected by ultrasonic waves while the container 1 rotates with the container 1 and remains relatively stationary with respect to the outer circumferential surface 1a.

When the ultrasonic oscillator 17 rotates to the chain line position, the guide member 6.7 simultaneously retreats in the direction of the arrow 22, and the storage container 1
After rotating appropriately, the ultrasonic oscillator 17 and the movable member 1
8 move forward and come into contact with the storage container 1, and the above inspection is repeated. Outer peripheral surface 1a of storage container 1 at a certain height
When the above inspection is completed, the elevating member 4.5 moves vertically at an appropriate pitch to perform the above inspection.

In this manner, the ultrasonic oscillator 17 and the ultrasonic receiver 19 are
By moving the containers forward and backward respectively to achieve a state where they are in stationary contact with the rotating storage container 1, the rotating storage container 1 and the transferred substances contained therein can be moved efficiently within a short period of time. can.

"Effects of the Invention" As explained above, according to the present invention, the detection elements such as the ultrasonic oscillator and the ultrasonic receiver are brought into contact with the circumferential surface of the rotating storage container, and are moved together with the circumferential surface. Make it rotatable,
By creating a relative standstill time between the storage container and the detection element, it is possible to perform ultrasonic measurement of the object to be inspected while it is moving, and the time and work required for measurement can be reduced.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinally sectional front view of an ultrasonic measuring device to which the ultrasonic measuring method for moving substances of the present invention is applied, and FIG. 2 is a plan view of the same. 1... Storage container, 4.5... Lifting member, 6.7... Guide member, 14... Movable member, 17...・Ultrasonic oscillator, 19... Ultrasonic receiver. Applicant: Japan Atomic Energy Corporation Representative: Ume Yamauchi, Patent Attorney
Male figures 1 and 2

Claims (1)

[Claims] At a symmetrical position at the same height on the side of a vertically cylindrical moving substance rotating in one direction, a pair of elevating members move up and down synchronously in the vertical direction, and each inner peripheral surface is connected to the moving substance. a guide member that is spaced equidistantly from the outer periphery of the guide member and is attached to each elevating member so as to form an arc and move forward and backward in synchronization with the moving object; a movable member that is capable of reciprocating and is biased in a direction opposite to the direction of rotation of the circumferential surface of the moving substance and is attached to each guide member; An ultrasonic oscillator that comes into contact with the circumferential surface of a rotating moving substance and rotates together with the moving substance when the member moves forward, and an ultrasonic receiver that is fixed to the other moving member in the same way as this ultrasonic oscillator. An ultrasonic measuring device for moving substances, comprising: