JPH057599Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention can be used, for example, to temporarily store fuel assemblies made in the assembly department by intervening in a transfer line connecting the manufacturing department and the inspection department. This relates to a temporary storage stand for fuel assemblies on a production line.

"Conventional technology and its problems" Conventionally, in the nuclear fuel manufacturing process, when transporting fuel assemblies made in the manufacturing department to the subsequent inspection department, a crane was used to transport them one by one. Ta.

By the way, in the case of such a transportation method using a crane, there is a possibility that both the manufacturing department and the inspection department have to scramble for the crane, and that the locking part attached to the tip of the crane is not attached to the top of the fuel assembly. The fuel assembly must be hooked onto the locked part, carried to the storage stand, removed from the locked part, and set on the storage stand, which requires delicate crane operations, which is said to be inefficient. It was fraught with problems.

In addition, as another means of transportation, in order to prevent cranes from competing with each other between the manufacturing department and the inspection department, a storage stand is provided between the manufacturing department and the inspection department, and the fuel assemblies are temporarily placed on this storage stand. It is also being stored.

However, such a method still requires delicate crane operations, and is not a sufficient solution in terms of improving efficiency.

Furthermore, since the completed fuel assembly is placed on a storage table, an excessive load is applied to the lower nozzle of the fuel assembly, which may cause problems such as bending of the fuel assembly itself. The upper part (upper nozzle) of each vertically formed fuel assembly is clamped to prevent it from falling over, but it is not easy to align the center of the clamp with the center of the fuel assembly and it takes time, so automation is not recommended. There were also some unsolvable problems.

The present invention has been developed in view of the above circumstances, and it is possible to achieve highly efficient transfer by eliminating the need for cranes to juggle, is less likely to cause adverse effects such as bending on fuel assemblies, and is easy to automate. The purpose is to provide a temporary storage platform for the aggregate.

"Means for Solving the Invention" The present invention consists of a base, an upper plate and a lower plate which are rotatably provided on the upper part of the base and parallel to each other at a predetermined interval, and these upper and lower plates. a rotation mechanism that integrally rotates the upper plate by a predetermined angle; and a rotation mechanism that is arranged around the outer periphery of the upper plate at predetermined intervals in the circumferential direction and extends radially inward from the periphery, and is provided with fuel that is transferred along the rail. A fuel assembly locking notch is provided on the upper surface of the lower plate to face the locking notch and is movable up and down, and the fuel assembly is suspended by the locking notch. It is characterized by comprising a locking pin that fits into the hole of the lower nozzle of the supported fuel assembly to restrict the swinging of the fuel assembly.

"Operation" The fuel assembly sent by the transfer rail is inserted into the cutout of the upper plate via the hanging tool, and is supported in a suspended state by the upper plate. Also, after supporting the fuel assembly in this way, the pin provided on the lower plate rises and fits into the hole of the lower nozzle of the fuel assembly,
This prevents the fuel assembly from swinging back and forth and left and right.

As described above, after the fuel assembly is supported so as not to move at two points above and below, the upper plate and the lower plate are rotated by a predetermined angle by the rotation mechanism, so that the next notch corresponds to the transfer rail.

Next, the same operation as above is performed to set the fuel assembly in the notch corresponding to the transfer rail.

Thereafter, the above operation is repeated to set fuel assemblies one after another into the notches of the upper plate.

On the other hand, a fuel assembly supported at two points above and below by a notch in the upper plate and a pin in the lower plate corresponds to a rear rail that is provided at a predetermined angle (for example, 180 degrees) different from the preceding rail. When in position, the pin lowers to release the lower nozzle from the hole, and the fuel assembly is then transferred to the rear rail and transported along the rail to the rear side.

"Embodiment" An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 is a perspective view of a storage stand according to the present invention, Fig. 2 is an enlarged sectional view of the circular part of Fig. 1, and Fig. 3 is a drive mechanism for a pin inserted into a hole in a lower nozzle of a fuel assembly. The explanatory diagram, FIG. 4, is a view taken along the - line arrow in FIG.

Reference numeral 1 in the figure is a rail connecting the manufacturing department and the inspection department, and a block 2 is movably disposed on the rail 1 so as to surround the outer periphery of the rail 1. A locking portion 3 consisting of a hook or the like is provided extending downward from the block 2, and a fuel assembly 4 is suspended from the locking portion 3 via a hanging device 5.

10 is a storage stand provided at the bottom of the rail, and this storage stand 10 is provided with a disk-shaped base 11 and an upper part of this base 11, rotatably and parallel to each other at a predetermined interval. Upper plate 12 and lower plate 1
3, and a rotation mechanism (not shown) that rotates the upper plate 12 and the lower plate 13 intermittently and integrally at predetermined angle intervals. Moreover, 15 is a support that supports the upper plate 12 and the lower plate 13.

A plurality of notches 1 are provided on the outer periphery of the upper plate 12 for suspending and supporting the fuel assembly 4 via the hanging tool 5.
6 are provided at predetermined intervals in the circumferential direction and extend radially inward from the outer peripheral edge. The notch 16 is composed of an outer straight part 16a set to a width that allows the rod 18 of the hanging tool 5 to be inserted through it, and a circular hole part 16c in the inner part having a tapered part 16b that gradually narrows on the lower side. (See Figure 2).

On the other hand, the hanger 5 is attached to the upper nozzle 4 of the fuel assembly 4.
A rod 18 is detachably attached to the rod 18 and has a ring portion 17 on the upper part, a disk portion 19 is provided below the ring portion 17 so as to be perpendicular to the rod 18, and a disk portion 19 is provided. and rod 1
8, a rolling member 21 that is rotatable via a ball 20, and a stop ring 2 that restricts the relative movement of the rolling member 21 in the longitudinal direction with respect to the rod 18.
It is composed of 2.

When the hanging tool 5 is set in the notch 16 of the upper plate 12, the tapered part 16b on the notch 16 side and the tapered part 21a provided on the lower outer periphery of the rolling member 21
Due to the centripetal action, the hanging tool 5 is positioned approximately at the center of the notched circular hole portion 16c, and the hanging tool 5 is rotatably supported by a thrust bearing consisting of a disk portion 19, a ball 20, and a rolling member 21. be done.

Further, reference numeral 22 is a pin provided on the lower plate 13 in correspondence with the notch 16 of the upper plate 12 so as to be vertically movable and rotatable about the center line _I1 .
is inserted into a hole previously formed in the lower surface of the lower nozzle 4b of the fuel assembly 4 supported by the notch 16 of the upper plate 12 via the hanging tool 5, and This is to control runout. The fuel assemblies 4 positioned by the pin 22 and the notch 16 are separated from each other by a shielding plate 24 disposed between the upper plate and the lower plate.

The vertical movement mechanism and rotation mechanism of the pin 22 will be explained with reference to FIG.
A cylindrical member 30 is welded between a and 13b perpendicularly thereto, and inside the cylindrical member 30 is a linear head motor 31 fixed to the lower plate component 13a.
A speed control motor 32, a gear head 33, and a connecting cylindrical body 34, which are operated to move up and down via a, are arranged in this order from the bottom. Cylindrical body 3
A table bearing 35 is fixed to 4 by screws, and a rotary table 37 is rotatably provided on the table bearing 35 via a thrust bearing 36. And this rotary table 37
The pin 22 is implanted in the hole. Further, the rotary table 37 is configured to be rotated by an output shaft 33a of the gear head 33.

That is, the pin 22 fitted into the hole of the lower nozzle 4b of the fuel assembly 4 is connected to the linear head motor 3.
1 for vertical movement, and a speed control motor 32 for rotation around an axis _l1 .

Next, the operation of the storage table 10 having the above configuration will be explained.

The fuel assembly 4 produced in the manufacturing department is suspended on the rail 1 by a hanger 5 and transported as shown by the arrow in FIG. In the same fuel assembly 4, the rod 18 of the hanging tool 5 is attached to the top plate 12 of the storage table.
The transfer is stopped when it fits into the inner part 16c of the notch 16.

Next, a robot arm (not shown) is operated remotely to transfer the fuel assembly 4 together with the hanging tool 5 from the locking portion 3 of the block 2 to the notch 16 of the upper plate 12.

At this time, due to the centripetal action between the tapered part 16b on the notch 16 side and the rolling member tapered part 21a on the suspender 5 side, the fuel assembly 4 can be positioned at the normal position, and the ball and rolling member The fuel assembly 4 can be rotatably supported by a thrust bearing such as 21.

Next, the locking pin 2 erected on the rotary table 37
2 is raised by driving the linear head motor 31 while being rotated by the speed control motor 32, and is inserted into the hole of the lower nozzle 4b of the fuel assembly 4 suspended and supported by the upper plate 12.

Next, the fuel assembly 4 supported at two upper and lower points as described above is rotated by a predetermined angle together with the upper plate 12 and the lower plate 13 by a rotation mechanism (not shown), so that the next notch 16 corresponds to the transfer rail 1.

The same operation as described above is performed for this newly matched notch 16 and the pin 22 below it, and the fuel assembly 4 is set between this notch 16 and the locking pin 22.

Thereafter, the same operations as described above are repeated to set the fuel assemblies 4 between the respective notches 16 of the upper plate 12 and the pins 22 below them.

Note that while the fuel assembly 4 is supported between the notch 16 and the pin 22, the appearance can also be inspected by operating the speed control motor 32 to rotate the fuel assembly 4 around _l1 . .

When the fuel assembly 4 supported as described above is rotated 180 degrees from the point where it was initially transferred to the storage stand 10, it corresponds to the rail leading to the inspection section, and at this point, the linear head motor 31
is operated, the pin 22 is lowered, and the locking of the pin 22 to the lower part of the fuel assembly 4 is released. Thereafter, by remotely controlling a robot arm different from the one mentioned above, the fuel assembly 4 is lifted together with the hanging tool 5 onto the upper plate 1.
2 to the transfer rail 1, and then transferred to the inspection section through the rail 1.

"Effects of the invention" As explained above, according to the invention, there is a position where fuel assemblies sent from the preceding rail are transferred to the storage stand, and a position where the fuel assemblies are transferred from the storage stand to the subsequent rail. Since the location is different,
It is possible to eliminate crane conflicts and achieve highly efficient transfer. In addition, since the fuel assembly is stored in a hanging manner, it is difficult to cause any adverse effects such as bending on the fuel assembly. Furthermore, since the loading and unloading positions of fuel assemblies on the storage platform are determined, remote control by a robot arm can be easily performed and automation can be achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a perspective view showing the schematic structure of the device, Fig. 2 is an enlarged sectional view of the circular part, and Fig. 3 shows the vertical movement mechanism and rotation mechanism of the locking pin. The sectional view shown in FIG. 4 is a view taken along the - line arrow in FIG. 3. 1...Rail, 4...Fuel assembly, 4b...Lower nozzle, 5...Hanging tool, 10...Storage stand, 11
...Base, 12...Top plate, 13...Lower plate, 16...
...notch, 22...locking pin.

Claims (1)

[Scope of utility model registration request] A storage stand that is interposed in a transfer rail and temporarily stores fuel assemblies that are transferred along the rail via a hanging device, and includes a base and an upper part of the base that is rotatable and An upper plate and a lower plate provided parallel to each other at a predetermined interval, a rotation mechanism that integrally rotates the upper plate and the lower plate by a predetermined angle, and a rotation mechanism arranged at predetermined intervals in the circumferential direction around the outer periphery of the upper plate. and a fuel assembly locking cutout extending radially inward from the periphery and locking and suspending a fuel assembly transferred along the rail;
It is provided on the upper surface of the lower plate opposite to the locking notch and is movable up and down, and is inserted into the hole of the lower nozzle of the fuel assembly suspended and supported by the locking notch. A temporary storage stand for fuel assemblies in a production line, characterized by comprising a locking pin for regulating runout.