JP4812569B2 - Cylindrical drum canning equipment - Google Patents

Description

  The present invention relates to a cylindrical drum canning apparatus for inserting a cylindrical body into a drum can, and more particularly to a cylindrical drum canning apparatus for storing a radioactive melted solidified body in a drum can.

  Of the low-level waste generated at radioactive facilities, miscellaneous solid waste is packed in drums, filled with mortar, and buried in a predetermined burial site. Since the number of drums to be discharged has a close influence on the cost of burying disposal, a device has been devised to maximize the amount of miscellaneous solid waste to be filled in one drum.

  As a method of reducing the volume of miscellaneous solid waste, a method of melting and reducing the volume of miscellaneous solid waste using a melting furnace by high frequency induction heating is used. A miscellaneous solid waste is put into a bottomed cylindrical ceramic crucible called a canister, set in a melting furnace, and melted by high frequency induction heating. When miscellaneous solid waste melts and reduces its volume, the capacity of the canister can be increased, so the melting proceeds while adding more waste. When the canister is sufficiently filled with molten metal, the canister is taken out from the melting furnace and cooled and solidified to obtain a melt-solidified body. This melt-solidified body is inserted into a drum can and filled with mortar to form a waste body.

  In order to increase the amount of miscellaneous solid waste enclosed in the drum, the gap between the outer peripheral surface of the canister and the inner peripheral surface of the drum can is configured to be as small as possible. For example, a canister that fills a 200 l drum with an inner diameter of 567 mm ± 3 mm is manufactured with an outer diameter of 550 mm, and the gap between the inner wall surface of the drum can and the outer wall surface of the canister is very narrow, 7-10 mm.

  Usually, when an object is stored in a container having no margin, a method of grasping and hanging the upper part of the object is used, but since the canister is weakened by high temperature processing, it is difficult to grasp by a hook or vacuum suction. In particular, since the molten metal is present in the lower layer and the slag is separated in the upper layer in the canister, when the upper part of the molten solid body is held and lifted, the molten metal layer and the slag layer are separated from each other. There is a high risk that the molten metal will fall and the molten metal part will fall.

  Further, the melt-solidified body reaches 400-700 kg. In order to store heavy objects in a drum can, it is generally hung with a wire rope or nylon sling and suspended in a drum can with a crane or the like, but in order to release the sling in the drum can, the molten solidified body and the drum can A gap of several tens of mm is required between them. There is also a method of gripping the side of the melt-solidified body with a zipper mechanism that can be moved up and down, and inserting it into the drum can. However, if the tip of the chuck is inserted between the melt-solidified body and the drum can, it must be loosened. Of course, a gap of several tens of mm is necessary.

  Therefore, as a method for storing the molten solidified body in a drum can, for example, Patent Document 1 discloses a columnar body in which the top of the molten solidified body is turned upside down in advance and the molten solidified body is inverted together with the drum can after being covered with the drum can from above. A drum can storage method has been proposed. Further, in Patent Document 2, an inclined guide is inserted into an inlet portion of an inclined drum can, and a melt-solidified body is placed on the guide, and this is slid along with or on the guide to be stored in the drum can. A body drumming method and apparatus has been proposed.

However, these methods have a problem that the apparatus becomes complicated and large, and the equipment cost becomes high. In particular, since the melted solid is radioactive, it is required to be handled remotely, so it is desirable to make the equipment as simple as possible.
JP-A-8-248193 Japanese Patent Application Laid-Open No. 11-271496

  Therefore, the problem to be solved by the present invention is to provide a cylindrical drum canning device capable of remotely inserting a cylindrical body, for example, a radioactive molten solidified body into a storage container having a very small gap with the container wall surface by a very simple mechanism. Is to provide.

In order to solve the above-mentioned problems, the cylindrical drum canning device of the present invention is a cylindrical drum canning device for storing a cylindrical body in a drum can, and includes an elastic suppression tube, and an intake / exhaust gas that press-fits and discharges fluid into the suppression tube Device, a drive device that inserts and pulls out the suppression tube into the drum can, and the suppression tube is positioned in the gap between the cylindrical body and the drum can to suppress the descending speed of the cylindrical body, and the suppression tube is placed on the inner wall surface of the drum can After inserting and inflating the suppression tube by the intake / exhaust device, the cylindrical body is received and gripped in the drum can, the expansion pressure of the suppression tube is changed to control the descending speed of the gripped cylindrical body, and the cylindrical body is the drum can of down to the bottom and Shizu置and then loosen the inflation pressure to shrink the suppression tube, and characterized in that as pulled out to the outside from between the drum and the cylindrical body That.

  The cylindrical drum canning device of the present invention can be used particularly when a canister in which miscellaneous solid waste is melted is drummed. The suppression tube is made of a thin and strong elastic material such as hard rubber or hard nylon.

  The cylindrical drum canning device of the present invention is inserted into the drum can placed on the mounting table, the suppression tube is expanded by the intake / exhaust device, and then the cylindrical body conveyed above the drum can by the transfer device is lowered into the drum can Let The suppression tube is, for example, a cylindrical shape having a diameter that circumscribes the inner wall surface of the drum can, and is formed to have a length that reaches the middle or near the lower end of the drum can from the opening. Further, it may be a rod shape or a plate shape, and a plurality of them may be arranged at regular angular intervals at the outer peripheral position of the drum. Fluid is introduced and expanded so that the inner surface of the suppression tube is slightly narrower than the outer diameter of the cylindrical body. The fluid may be an inexpensive gas such as air.

When the bottom of the cylindrical body reaches the opening of the drum, the restraining tube circumscribes the bottom of the cylindrical body inward and applies a drag to the downward movement of the cylindrical body. Thereafter, when the gripping of the device for lowering the drum can is released, the cylindrical body descends due to its own weight while receiving the pressure generated by the fluid pressure of the suppression tube. The descending speed of the cylindrical body is restrained by the pressing force of the restraining tube, and it gently lands on the bottom surface of the drum.
Note that by changing the fluid pressure of the suppression tube, the pressing force against the cylindrical body can be adjusted to control the descending speed of the cylindrical body.

  After the cylindrical body has landed on the bottom surface of the drum, the fluid is discharged from the suppression tube and contracted, and the suppression tube is pulled out from the drum can opening and removed. Since the suppression tube is formed of a thin film, when the fluid is discharged from the suppression tube, it shrinks and becomes very thin and can be easily pulled out from a narrow gap between the drum can and the cylindrical body. Thereafter, the gap between the drums is filled with mortar and sealed to form a waste body.

  According to the cylindrical drum canning device of the present invention, the drum can can be easily packed even when there is no margin between the cylindrical body and the drum can. Moreover, since a jig | tool, a band, etc. do not remain in a drum can after canning and a suppression tube can be used repeatedly, it is very economical. Furthermore, since there are almost no mechanical moving parts and the structure is simple, installation and maintenance are not troublesome, and remote handling is easy, so introduction and operation costs are very low.

  Furthermore, a cylindrical body lowering device for lowering the cylindrical body from above the position where the drum can is placed to the drum can opening equipped with the cylindrical drum canning device can be provided. The cylindrical body lowering device is composed of an outer wall and a lowering tube fixed to the inner wall surface of the outer wall. The lowering tube is formed so as to be able to expand and contract by an intake / exhaust device, and when the cylindrical body is received by the cylindrical body lowering device, the lowering tube Holds the cylinder by the pressure generated by the fluid pressure surrounding the cylinder, and lowers the cylinder to the opening of the drum can while controlling the descending speed of the cylinder by changing the pressure of the descending tube, and the above suppression You may form so that a cylindrical body may be delivered to a tube.

  The cylindrical body lowering device is formed such that one corner of the side wall surface is opened outward by a hinge. The cylindrical body conveyed by the conveying means in a state where one corner of the side wall surface is opened is introduced into the cylindrical body lowering device, and the opened side wall surface is closed and fixed. Thereafter, a fluid such as air is press-fitted into the descending tube fixed to the inner wall surface to expand the descending tube, and the cylindrical body is gripped. Subsequently, the conveying means is retracted to reveal the lower drum can, and the cylinder pressure is lowered to the drum can by slightly lowering the fluid pressure in the descending tube.

  In a cylindrical drum canning device equipped with a cylindrical body lowering device, a cylindrical body conveyed from an upstream process by a conveying means such as a belt conveyor is received by the cylindrical body lowering device, and the cylindrical body is gripped by the pressing force of the lowering tube, and lowered. While adjusting the fluid pressure of the tube to adjust the descending speed of the cylinder, the cylinder is lowered to the opening of the drum can located below. After that, deposit the cylinder in the suppression tube inserted into the drum, and release the cylinder by depressurizing and contracting the descending tube. Then, as described above, the descending speed of the cylinder is controlled by the fluid pressure of the suppression tube. However, it can be lowered to the bottom of the drum and allowed to stand.

  In the cylindrical drum canning device provided with the cylindrical body lowering device, it is not necessary to lift the cylindrical body, so that there is no risk of dropping due to lifting, and the cylindrical body can be safely stored in the drum can.

  In addition, if a bowl-shaped guide flange is provided on the upper part of the suppression tube to be inserted into the drum can, the cylindrical body can be stored in the drum can without being strictly positioned when the cylinder is lowered from above the drum can. In particular, remote handling becomes very easy. If an elastic tube is fixed to the upper surface of the guide flange and a fluid is press-fitted, the impact can be buffered when the cylindrical body contacts the flange.

  Hereinafter, the present invention will be described in detail based on examples with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a state where the cylindrical drum canning device of this embodiment is mounted on a drum can. A cylindrical drum canning device 3 is inserted into a drum can 2 placed on the placing table 1. As shown in FIG. 2, the cylindrical drum canning device 3 includes an upper surface tube 4, a side surface tube 5, intake / exhaust nozzles 6 and 7, a guide flange 8, and a stopper flange 9 that are integrally formed. An intake / exhaust device (not shown) is connected to the intake / exhaust nozzles 6, 7.

A support base 10 is disposed on the side of the drum 2. Above the drum 2, a canister 12 that is suspended from the transport device 11 is shown.
The cylindrical drum canning device 3 is supported on a support base 10 by a stopper flange 9. The side tube 5 has a cylindrical shape whose outer diameter is substantially equal to the inner diameter of the drum 2, and the upper portion is fixed to the guide flange 8.

In FIG. 1, the lower part of the side tube 5 is inserted into the drum can 2 and inscribed in the drum can 2. The upper surface tube 4 is fixed to the upper surface of the guide flange 8. Intake and exhaust nozzles 6 and 7 are connected to the side tube 5 and the top tube 4 respectively.
The side tube 5 is formed thin with a strong elastic material such as hard rubber or hard nylon. The upper tube 4 is made of a sufficiently strong material.

  When the transfer device 11 is driven to lower the canister 12, the bottom of the canister 12 comes into contact with the upper surface tube 4. When the canister 12 is further lowered, the center axis position of the canister 12 is forced to coincide with the center axis of the drum can 2 according to the inclination of the guide flange 8, and the canister 12 is placed in the center of the opening of the drum can 2.

  When the canister 12 is further lowered, the bottom of the canister 12 contacts the side tube 5. Since air of appropriate pressure is supplied to the side tube 5 from the intake / exhaust nozzle 6, the bottom side surface of the canister 12 receives a pressing force from the side tube 5, and a frictional force is applied to the canister lowering.

  When the canister 12 is further lowered, the canister 12 is lowered and stored in the drum can 2 while receiving a pressing force from the side tube 5. Accordingly, the area in contact with the side tube 5 increases, and the pressing force that the canister 12 receives from the side tube 5 also increases.

  When the canister 12 enters the drum can 2 until the friction force sufficient to support the weight of the canister 12 from the side tube 5 is obtained, the suspension grip of the transport device 11 is released. Thereafter, the lowering speed of the canister 12 is suppressed by the frictional force, and the canister 12 can safely reach the bottom surface of the drum can 2. Note that the speed at which the canister 12 descends by its own weight may be controlled by adjusting the expansion force of the side tube 5 by the intake / exhaust device.

  When the canister 12 is completely stored in the drum 2, the air in the side tube 5 is exhausted from the intake / exhaust nozzle 6, the side tube 5 is contracted, and the side tube 5 is pulled out above the drum 2. Since the side tube 5 is formed of a thin film, when compressed air is discharged from the side tube 5, the side tube 5 contracts and becomes very thin and can be easily pulled out from a narrow gap between the drum 2 and the canister 12. Thereafter, the gap between the canister 12 and the drum can 2 is filled with mortar, and the drum can 2 is covered and sealed to obtain a waste.

  According to the cylindrical drum canning device of the present embodiment, the canister 12 can be safely drummed by suppressing the descending speed of the canister 12 by the fluid pressure of the side tube 5 and adjusting the air pressure in the side tube 5 by the intake / exhaust device. 2 can be stored. Therefore, the structure of the device is simple and control is very easy.

  Moreover, since the cylindrical drum canning device 3 can be removed from the drum can 2 after the canister 12 is stored, the space for filling the mortar is not blocked, and high safety can be secured. The extracted cylindrical drum canning device 3 can be used repeatedly, which is economical.

  Further, since the guide flange 8 and the upper surface tube 4 are provided, the axial alignment when the canister 12 is lowered onto the drum can 2 is simple, and particularly remote work can be smoothly advanced.

The standard outer diameter of the canister 12 is 550 mmφ and the height is about 803 mm. If the effective contact height between the canister and the side tube 5 is 500 mm, the contact area is about 0.86 m ² . When the coefficient of friction is 0.5 and the mass of the canister 12 is 700 kg, the required pressure is 0.016 Mpa. Therefore, the side tube 5 may be a commonly used shrinkable material such as hard rubber or hard nylon, and a small intake and exhaust device is sufficient.

On the other hand, in the figure, the side tube 5 has a length that reaches the bottom of the drum 2, but when sufficient frictional stress can be obtained to support the weight of the canister 12, the length is about 20 cm from the opening of the drum 2. It may be good. If the length of the side tube 5 is shortened, the production cost of the side tube 5 as a consumable part can be reduced, and the side tube 5 can be pulled out of the drum can 2 more easily. Moreover, the upper surface tube 4 and the side surface tube 5 may be integrated.
The side tube 5 is not limited to a cylindrical shape, and may be a strip-like or rod-like hollow piece arranged at an appropriate interval along the outer periphery of the drum can.

  FIG. 3 is a cross-sectional view of a cylindrical drum canning device provided with the cylindrical body lowering device in the second embodiment of the present invention. FIG. 4 is a top view of the cylindrical body lowering device.

  A drum 2 is mounted on the mounting table 1 and a side tube 5 is inserted. A cylindrical body lowering device 20 is disposed above the mounting table 1, and the lower surface of the cylindrical body lowering device 20 is in contact with the roller conveyor 21. Further, the roller conveyor 21 positioned immediately below the cylindrical body lowering device 20 is a retractable shutter conveyor 22.

  The cylindrical body lowering device 20 includes a cylindrical wall 23 and a lowering tube 24, and an intake / exhaust nozzle 25 is connected to the lowering tube 24. The intake / exhaust nozzle 25 is connected to an intake / exhaust device (not shown). The cylindrical wall 23 is provided with a receiving port 30 that opens and closes toward the upstream side of the roller conveyor 21.

  In the cylindrical drum canning apparatus of the present embodiment, the canister 12 is conveyed from the upstream process by the roller conveyor 21 and introduced into the apparatus. First, the shutter conveyor 22 is pulled out below the cylindrical body lowering device 20, and the canister 12 is carried in by the roller conveyor 21 with the receiving port 30 opened. When the canister 12 is transferred from the roller conveyor 21 to the shutter conveyor 22 and placed in the center of the cylindrical body lowering device 20, the driving of the roller conveyor 21 and the shutter conveyor 22 is stopped, and the receiving port 30 is closed.

  Thereafter, when air is supplied from the intake / exhaust nozzle 25 to the descending tube 24 and the descending tube 24 is expanded, a pressing force is generated from the descending tube 24 to the canister 12 due to the fluid pressure, and the descending tube 24 causes the canister 12 to be moved by the frictional force. To hold.

  When the descending tube 24 has sufficient pressing force, the supply of air from the intake / exhaust nozzle 25 is stopped, the shutter conveyor 22 is retracted to the retracted position, and the lower portion of the canister 12 is released. Below the canister 12, the drum 2 in which the side tube 5 is inserted is located.

  When air is gradually discharged from the intake / exhaust nozzle 25 and the pressure of the descending tube 24 is lowered, the holding force with respect to the canister 12 is weakened, and the canister 12 is lowered to the opening of the drum can 2 by its own weight. The cylindrical body lowering device 20 adjusts the fluid pressure of the lowering tube 24 to control the lowering speed of the canister 12, and the canister 12 is safely in contact with the upper surface tube 4, and further inserted into the drum can 2, so The canister 12 is lowered until it is supported.

  Thereafter, the air is discharged from the intake / exhaust nozzle 25 to release the holding of the canister 12 and the canister 12 is safely stored in the drum can 2 while adjusting the fluid pressure of the side tube 5 as in the first embodiment.

  According to the cylindrical drum canning device of the present embodiment, since it is not necessary to suspend the canister 12 with the suspending device, it is possible to avoid the risk that the canister 12 falls due to the gripping of the suspending device being released. it can. In particular, even in remote operation, the radioactive weight body can be handled safely, which is very advantageous.

It is sectional drawing which shows the state which mounted | wore the cylindrical drum canning apparatus of a present Example with the drum can. It is a perspective view which shows the cylindrical drum canning apparatus of a present Example. It is sectional drawing of the cylindrical drum canning apparatus provided with the cylindrical body dropping apparatus in 2nd Example of this invention. It is a top view of the cylindrical body lowering apparatus in the 2nd example of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mounting stand 2 Drum can 3 Cylindrical drum canning device 4 Upper surface tube 5 Side tube 6, 7, 25 Intake and exhaust nozzle 8 Guide flange 9 Stopper flange 10 Supporting base 11 Conveying device 12 Canister 20 Cylindrical body lowering device 21 Roller conveyor 22 Shutter conveyor 23 Cylindrical wall 24 Descent tube 30 Entrance

Claims (7)

A cylindrical drum canning device for storing a cylindrical body in a drum can, comprising a stretchable restraining tube, an intake / exhaust device for pressurizing and discharging fluid into the restraining tube, and a drive device for inserting and pulling out the restraining tube into the drum can The restraining tube is positioned in the gap between the cylindrical body and the drum can to suppress the descending speed of the cylindrical body, and the restraining tube is inserted into the inner wall surface of the drum can to said cylinder body the inhibitory tube after inflated to grip accepted within the drum, to control the lowering speed of the cylindrical body that is gripped by the inflation pressure is changed in the suppressive tube, a circular cylindrical body wherein the drum and Shizu置Lower to bottom, then loosen the inflation pressure is deflated to the suppressive tube, characterized in that as pulled out to the outside from the gap of the drum and the circular columnar body Pillar drum canning equipment.   The cylindrical drum canning device according to claim 1, wherein the cylindrical body is a canister in which miscellaneous solid waste is melted.   The cylindrical drum canning device according to claim 1 or 2, wherein the suppression tube has a cylindrical shape having a diameter that circumscribes an inner wall surface of the drum can.   The cylindrical drum canning device according to claim 1 or 2, wherein the suppression tube has a rod shape or a plate shape, and two or more suppression tubes are inserted into the drum can.   The cylindrical drum canning device according to any one of claims 1 to 4, wherein a guide flange having an inner diameter substantially equal to a diameter of the drum can is attached to an upper end of the suppression tube.   The cylindrical drum canning device according to any one of claims 1 to 5, wherein the fluid is air.   And a cylinder lowering device that lowers the cylindrical body from above the position where the drum can is placed to the drum can opening, and the cylinder lowering device comprises an outer wall and a lowering tube fixed to the inner wall of the outer wall, The descending tube is formed to be able to expand and contract by the intake / exhaust device, and when the cylindrical body is received by the cylindrical body descending device, the descending tube surrounds the cylindrical body and holds the cylindrical body by the expansion pressure. The cylindrical body is lowered to the opening of the drum can while the cylindrical body is delivered to the suppression tube while controlling the descending speed of the cylindrical body by changing the expansion pressure of the descending tube. The cylindrical drum canning device according to any one of claims 1 to 6.

Images