JPH09285765A - Pelleted nuclear fuel classifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct classification with good working efficiency, without any variation and with enhanced measuring accuracy by confirming the height of a pellet, moving the pellets on a turnplate and sorting the nondefective pellet having a tolerable height from the defective pellet having an intolerable height. SOLUTION: A pellet 1 detected by a position detecting sensor 17 is confirmed in a control part, and the information is given to a pellet height confirming means 18. The means 18 is provided with a height detecting sensor 19 such as a laser length measuring device. The detected height of the pellet 1 is confirmed in the control part. Whether the pellet has a tolerable height or not is judged, and the result is transmitted to a pellet sorting means. The pellets 1 judged by the pellet height confirming means 18 are moved on a turnplate 13 and sorted by the means 20 into the nondefective one and the defective one, and the nondefective one is sent into a nondefective pellet receiving pan 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention confirms whether a height dimension of a nuclear fuel pellet molded body molded into a predetermined shape by a molding machine is a good product which falls within the height size standard or a defective product which does not meet the height size standard. And a sorting device for sorting.

[0002]

2. Description of the Related Art Conventionally, the height dimension of a nuclear fuel pellet molded body that has been molded into a predetermined shape by a molding machine is measured, and it is selected whether it is a good product that falls within the height size standard or a defective product that does not meet the height size standard. For, the nuclear fuel pellet molded body in the glove box is manually used with a measuring instrument such as a micro gauge,
The size was measured individually, and it was sorted out by knowing whether it was a non-defective product within the dimensional height standard or a defective product outside the dimensional height standard.

[0003]

However, in this type of sorting apparatus, there is a problem that it takes a lot of time because of manual work, and there are many variations and the measurement accuracy is poor. The present invention solves the above-mentioned problems, and an object of the present invention is to provide a screening device for a nuclear fuel pellet molded body, which has good working efficiency and is highly consistent with high measurement accuracy.

[0004]

In order to achieve the above object, the apparatus for selecting a nuclear fuel pellet molded body of the present invention transfers the nuclear fuel pellet molded body 1 onto a turntable 3 which rotates at a predetermined speed, and turns it. The molded body 1 from above the table 3
To a predetermined position, a molded body confirmation means 11 for confirming the molded body 1 transported by the transporting means and sending it to the next turn plate 13, and a predetermined position on the turn plate 13. A molded body position confirming means 16 for confirming the molded body 1 with a molded body height confirming means 18 for measuring and confirming the height dimension of the molded body 1 on the turn plate 13.
After confirming the height of the molded body 1, a good product of the molded body 1 that moves on the turn plate 13 and falls within the standard of the height dimension and a defective product of the molded body 1 that does not meet the standard of the height dimension. And a molded body partitioning means 20 for partitioning.
Further, the molded body sorting means 20 is characterized in that the molded body sorting means 20 sorts the good products within the height dimension standard and the defective products outside the height dimension standard by the movement of the plate guide wall 21 provided at the end of the turn plate 13.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Since the present invention has such a structure, the molded body confirmation means is provided by the molded body confirmation means immediately before the nuclear fuel pellet molded body transported by the transport means through the turntable is transported to the turn plate. It is confirmed.
When confirmed, the molded body is transferred onto the turn plate,
It is confirmed at a predetermined position on the turn plate by the molded body position confirmation means. Further, at this position, the height dimension of the molded body is measured and confirmed by the molded body height confirmation means, and if it is determined whether it is a good product within the height dimension standard or a defective product outside the height dimension standard, the molded body is Move on the turn plate.

Further, the plate guide wall at the end on the turn plate side is moved by the molded body dividing means, and only those judged as non-defective products of the molded product are conveyed along the plate guide wall onto the non-defective molded product tray, In addition, since only defective products are moved to the final position of the turn plate and conveyed to the defective molded product tray, no mechanical work is required in the glove box without any manual work. It becomes work, and moreover, it is possible to successively and efficiently and reliably select good and defective products of height dimension.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a device for selecting a nuclear fuel pellet molded body according to this embodiment, and FIG. 2 is a plan view showing an essential part of this embodiment. In a nuclear fuel pellet molded body sorting apparatus, all nuclear fuel pellets sorted in a glove box and molded by a molding machine (not shown) in another glove box 2b as shown in FIGS. 1 and 2. A turntable 3 in which the molded body 1 rotates at a predetermined speed in the glove box 2a (the rotation speed of the normal turntable is about 16 sec /
It is rotation. ) Is transferred to the top. The nuclear fuel pellet molding 1 is usually formed in a cylindrical shape having an outer diameter of 20 mm and a height of 10 to 16 mm. The turntable 3 is provided with a turntable guide 4 so that the transferred molded body 1 does not pop out, and its rotational speed is adjusted by a speed control motor 5. The speed control motor 5 is controlled in a control chamber (not shown) outside the glove box.

The molded body 1 moved on the turntable 3 along the turntable guide 4 is conveyed to a predetermined position by the conveying means 6. The conveying means 6 comprises a belt conveyor 7, belt conveyor guides 8 for guiding both side ends of the belt conveyor 7, and a belt conveyor control motor 9 for adjusting the speed of the belt conveyor. The control of the belt conveyor control motor 9 is controlled in a control chamber (not shown) outside the glove box. Belt conveyor 7 of the conveying means 6
Is located below the turntable 3 at the forefront and is controlled to the same speed as the rotation speed of the turntable.
In the belt conveyor guide 8, the molded body 1 is transferred onto the belt conveyor 7 along the turntable guide 8 and reaches the predetermined position (the rear end of the belt conveyor).
It is formed so that it can be transferred without falling further. Reference numeral 10 is a detection sensor for confirming the presence of the molded body 1 on the way of the belt conveyor 7.

When the molded body 1 approaches the rear end of the belt conveyor 7, its presence is confirmed by the molded body confirming means 11, and then it is transferred onto a turn plate 13 described later. The molded body confirmation means 11 includes a molded body detection sensor 12 that detects the molded body 1 across the rear end of the belt conveyor 7, and controls the molded body 1 detected by the molded body detection sensor 12. Then, the position confirmation means 11 is notified. The control unit of the molded body confirmation means is controlled in a control chamber (not shown) outside the glove box.

The molded body 1 confirmed by the molded body confirmation means 11 is moved onto the turn plate 13. As shown in FIG. 2, the turn plate 13 has a bottom plate 26 on which the molded body 1 is placed without rotating, a turn shaft 27 having rotating claws 25, and a molded body at the outer peripheral end of the bottom plate. Of the turn plate guide 14 for preventing the falling of the sheet and the turn plate control motor 1 for adjusting the rotation speed of the turn plate
5 is provided. The turn plate control motor 15 is controlled in a control chamber (not shown) outside the glove box. Each claw 25 of the turn shaft 27 is rotated while sandwiching and holding the molded body 1 by the claw 25 on the upper surface of the bottom plate 26. The turn plate 13 is located below the belt conveyor 7 and is controlled to have the same rotation speed as the speed of the belt conveyor. The position of the molded body 1 on the turn plate 13 is confirmed at a predetermined position by the molded body position confirmation means 16.

The molded body position confirming means 16 is provided with a position detecting sensor 17, the controller 1 confirms the molded body 1 detected by the position detecting sensor 17, and notifies the next molded body height confirming means 18. are doing. The molded body position confirmation means 16
The control unit is controlled in a control room (not shown) outside the glove box. Turn plate 1
The height dimension of the molded body 1 whose position on 3 is confirmed is confirmed by the molded body height confirmation means 18. The upper surface of the molded body 1 in front of the molded body height confirming means 18 is previously cleaned with a brush, a brush or the like.

The molded body height confirmation means 18 is provided with a height dimension detection sensor 19 such as a laser length measuring device, and the height dimension of the molded body 1 detected by the height dimension detection sensor 19 is used as a control unit. The height of the molded body is checked to determine whether or not the height of the molded body falls within the height dimension standard or does not fall within the height dimension standard, and the molded body sorting means 20 to be described later is notified. The control unit of the molded body height confirmation means 18 is controlled in a control chamber (not shown) outside the glove box. The allowable range of the height dimension of the molded body 1 to be measured is about ± 0.01 mm, and if the height dimension of the molded body is 15 mm, 14.99 mm to 15.0 mm.
The range of 1 mm is treated as a good product.

The molded body 1 discriminated by the molded body height confirmation means moves on the turn plate 13, and the molded body sorting means 20 sorts out the good products and defective products. The molded body dividing means 20 is provided with a plate guide wall 21 whose one end moves toward the center of the turn plate 13 and a cylinder 22 which moves the plate guide wall, and the movement of the cylinder is controlled by a controller. There is. The control unit of the molded body sorting means 20 is controlled in a control chamber (not shown) outside the glove box.

The molded body dividing means 20 receives the detection result of the molded body height confirmation means 18, and if the molded body 1 is a good product, the shaft of the cylinder 22 is passed before the molded body held by the claw 25 passes. Is moved toward the center of the turn plate 13 to move the plate guide wall 21, and the molded body 1 separated from the claw 25 along the plate guide wall is sent to the molded good product tray 23, and when this feeding is completed, the cylinder 2
2 is restored to restore the plate guide wall 21.

When the molded body 1 is notified as a defective product, the cylinder 22 is not moved, and the molded body 1 held by the claw 25 is turned plate along the plate guide wall 21 and further along the turn plate guide. It advances to the final position of 13, and is sent to the molded product defective product tray 24. Further, the conventional manual selection of molded bodies has been performed at a speed of about 15 / min, but the apparatus of the present invention speeds up the selection of molded bodies to about 25 / min to 70 / min. be able to. Furthermore, in the embodiment of the present invention, the selection of the nuclear fuel pellet molded body has been described, but the present invention is not limited to this and may be used for the selection of other articles.

[0016]

As described above, the sorting apparatus of the present invention transfers the molded nuclear fuel pellets onto the turntable rotating at a predetermined speed, and conveys the molded bodies from the turntable to the predetermined position. A molded body confirmation means for confirming the molded body conveyed by the conveying means and sending it to the next turn plate; a molded body position confirmation means for confirming the molded body at a predetermined position on the turn plate; A molded body height confirmation means for measuring and confirming the height dimension of the molded body on the plate, and a non-defective product of the molded body which is moved on the turn plate and is within the standard of the height dimension after confirming the height of the molded body. And a molded product sorting means for distinguishing defective products of the molded product which are out of the standard of the height dimension. In addition, since the molded body partitioning means separates the good product within the height dimension standard and the defective product outside the height dimension standard by moving the plate guide wall provided at the end of the turn plate side, Since the moldings are sorted by machine operation rather than by manual work, the molded bodies can be sequentially and reliably moved and can be sorted very efficiently and continuously.

[Brief description of drawings]

FIG. 1 is a plan view showing a nuclear fuel pellet molded body sorting apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view showing a main part of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Nuclear fuel pellet molded body 3 ... Turntable 6 ... Conveying means 11 ... Molded body confirmation means 13 ... Turn plate 16 ... Molded body position confirmation means 18 ... Molded body height confirmation means 20 ... Molded body sorting means 21 ... Plate guide wall 25 , 25 ... claws 26 ... bottom plate 27 ... turn shaft

Front page continued (72) Inventor Takatoshi Okita 4 Muramatsu, Tokai-mura, Naka-gun, Ibaraki 33 33 Power Reactor and Nuclear Fuel Development Corporation Tokai Works (72) Inventor Katsuo Sudo 4 Muramatsu, Tokai-mura, Naka-gun, Ibaraki 33 Power Reactor / Nuclear Fuel Development Corporation Tokai Works

Claims (2)

[Claims] 1. A device for selecting, in a glove box, a nuclear fuel pellet molded body formed into a predetermined shape by a molding machine, the turntable (3) rotating the nuclear fuel pellet molded body (1) at a predetermined speed. Transfer means for transferring the molded body to a predetermined position from the turntable by transferring the molded body to the upper side.
(6), the molded body confirmation means (11) for confirming the molded body transported by the transporting means and sending it to the next turn plate (13), and at a predetermined position on the turn plate (13) Molded body position confirmation means (16) for confirming the molded body (1), molded body height confirmation means (18) for measuring and confirming the height dimension of the molded body on the turn plate (13), and the molded body After confirming the height, it moves on the turn plate and separates a good product of the molded product that falls within the standard of the height dimension and a defective product of the molded article that does not meet the height standard, the molded body sorting means (20) An apparatus for selecting a nuclear fuel pellet molded body, which comprises: 2. The molded body dividing means (20) is a turn plate.
(13) The nuclear fuel pellet molding according to claim 1, wherein the plate guide wall (21) provided at the side end is classified into a good product within the height dimension standard and a defective product outside the height dimension standard. Body sorter.