JPH0267998A - Compressed packaging of compression objects into container - Google Patents

Abstract

PURPOSE:To intend a highly efficient volume reduction by compressing a compression object in a container along a direction toward the container bottom which a compressing plate having a diameter little bit smaller than an inner diameter of the container and by repeating compressing processes which compress another compression objects placed on the first anti- spring-back plate. CONSTITUTION:A compression object 2 is packaged into a tubular and bottomed container 1 and the first anti-spring-back plate 3 is put on the object 2. A compressor 4 is activated and a compressing plate 5 is pushed down and therewith the compression object 2 is compressed with the plate 3 altogether. After completion of the compression, the compressing plate 5 is pulled up and, at that time, the plate 3 deflects towards a container bottom at its center part, an outer edge of the plate presses an inner wall of the container and the plate stays at the place resisting against a compression object's 2 force of volume restitution. Another compression object 2a is packaged on the plate 3 in a space obtained in a container by the compression and then the second anti-spring-back plate 3a is placed. Thereafter, another compression object 2a is compressed by the compressing plate 5 and after completion of the compression, the plate 5 is pulled up, and at that time, the compression object 2a is suppressed its force of volume restitution by the plate 3a. These processes are repeated until a space in the container 1 is filled with compression objects 2a.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is directed to compressed objects having a strong volumetric restoring force after compression.
The present invention relates to a method for compressing and storing as much as possible in one container while suppressing the restoration of its volume.

In particular, the method of this invention is useful for reducing the volume of radioactive waste, which has a strong volume recovery force after compression, as much as possible and compressing it into a container.

<Prior art> In order to compress and reduce the volume of an object to be compressed that easily recovers its volume after being compressed, such as radioactive waste made of vinyl sheets, the object to be compressed is placed in a container, and then the container is Conventionally, a method has been adopted in which the object to be compressed is compressed together with the container from the outside.

<Problem to be solved by the invention> However, in the conventional method as described above, a large compression force is required to compress the container, and a device for generating such a large compression force or a device for generating such a large compression force is required. A sturdy and large-scale device that can withstand pressure is required.

Therefore, this invention does not compress the container storing the compressed material, and therefore the compression device does not require a large compression force, making it possible to use a compact and lightweight device as a whole. The purpose of this invention is to provide a method that can efficiently compress and reduce the volume of highly compressed materials and store them in a container.

Means for Solving the Problem> The method of compressing and storing an object to be compressed in a container according to the present invention is as follows: (a) After storing an object to be compressed in a container, a piece with a size slightly larger than the inner diameter of the container is placed on top of the object. A flexible first detent plate made of a thin metal plate is placed thereon, and the compressed material in the container is compressed into the first detent plate by a compression plate having dimensions slightly smaller than the inner diameter of the container, which is interlocked with a compressor. compressing toward the bottom of the container together with a detent plate, and then raising the compression plate, (b
) After storing a new object to be compressed on top of the first temporary detent in the inner space of the container obtained by the compression in step (a) above, place a second detent plate thereon. and (e) compressing the new object to be compressed together with the second detent plate toward the bottom of the container using the compression plate, and then raising the compression plate, and (e) performing the step (b) above. It is characterized by comprising a process that is repeated as many times as necessary.

<Function> In the first step (a), when the object to be compressed is compressed together with the first detent plate, this detent plate has a dimension slightly larger than the inner diameter of the container and is flexible. As a result, it bends while pressing against the inner wall surface of the container, and remains in this state at the position pushed down by the compressor. Therefore, the compressed object compressed below the detent plate is prevented from recovering its volume by the detent plate.

In such a state, proceed to the next step (b), store a new object to be compressed on the detent plate, and compress it together with the second detent plate placed on top of it. The detent plate remains in the depressed position in a deflected state similar to the first detent plate, preventing recovery of the volume of the new compressed object beneath it.

Thus, by repeating step (b) as many times as necessary, from the bottom side in one container, the compressed object - the first detent plate - the compressed object - the second detent plate - the compressed object. The compressed object - the third detent plate...
The objects to be compressed can be sequentially compressed and stored in the container in a compressed state.

<Examples> Examples of the method of this invention will be described in detail below with reference to the drawings.

In FIG. 1A, a compressed object 2 is stored in a cylindrical bottomed container 1,
A state in which the first detent plate 3 is placed thereon is shown. In this figure, the compression plate 5 associated with the compressor 4 is in a raised position. Furthermore, a guard cylinder 6 is fitted around the outer periphery of the container 1 to suppress deformation of the container 1 when compressing the object 2 to be compressed. A guard ring 7 is fitted to prevent deformation of the opening of the container. Note that the guard tube 6 preferably has a structure having a small hole 6a at its bottom, and the guard ring 7 preferably has a structure that can be divided into two semicircumferential parts.

The detent plate 3 is made of a thin metal plate such as aluminum or iron, and has a thickness of about 0.5 to 0.8 ml, about 1 ml, and is flexible. Further, the diameter of the detent plate 3 is approximately 15 m1 larger than the inner diameter of the container 1.

Next, as shown in FIG. 1B, the compressor 4 is operated to push down the compression plate 5 and compress the object together with the detent plate 3. When the compression is completed, the compression plate 5 is raised as shown in FIG. 1C. At this time, the center part of the detent plate 3 bends toward the bottom of the container, and its peripheral edge suppresses the inner wall surface of the container, resisting the volume restoring force of the compressed object 2 below. remains in position.

In order to allow the center part of the detent plate 3 to bend toward the bottom of the container, it is desirable that the compression plate 5 has a shape in which the center part protrudes from the peripheral edge.

As shown in the first diagram, a new object to be compressed 2a is further stored on the detent plate 3 in the container internal space obtained by compression, and a second detent plate 3a is placed on top of it. I'll put it on.

In this state, as shown in FIG. 1E, the second detent plate 3
A new object to be compressed 2a is compressed by the compression plate 5 together with the compressed material 2a, and after the compression is completed, the compression plate 5 is raised. At this time, the volume restoring force of the compressed object 2a is suppressed by the detent plate 3a.

Repeat the above operation until all the space inside the container 1 is filled with the material to be compressed, and when it becomes as shown in Figure 1 F, the container 1
After removing the guard ring 7 from the opening and taking out the container 1 from the guard tube 6, attach the lid 8 to the opening of the container 1, and
Carry it out in the state shown in Figure G.

When the container opening is deformed and the guard ring 7 cannot be removed, the two-piece guard ring can be separated into two parts and removed. If the container 1 is deformed during compression and cannot be removed from the guard tube 6, the container 1 may be turned upside down together with the guard tube, and a rod or the like may be inserted into the small hole 6a at the bottom of the guard tube to push the container 1 out.

Vinyl sheets, which are generated in large quantities as radioactive waste and have a large capacity to restore their volume after compression, were conventionally stored in a cylindrical container with an inner diameter of 270 mm and a height of 330 mm. If used, compressor J5ton (
Gauge pressure) can store 15kg,
It has increased about 5 times.

<Effects of the Invention> As can be seen from the above explanation, according to the present invention, even objects to be compressed, such as vinyl sheets, which have a strong volume recovery force after compression, can be efficiently compressed and stored. Volume can be easily reduced.

Therefore, when this method of the invention is used to treat radioactive waste, it is possible to reduce the number of times radioactive waste is taken out and transported, and as a result, it is possible not only to reduce transportation costs and storage space for radioactive waste. , the number of times of radiation work can be reduced, and the amount of radiation exposure of workers can also be reduced.

Furthermore, according to the method of the present invention, the compression force can be reduced from 1110 to 1150 compared to the conventional method in which the container is compressed together with the object to be compressed, so the apparatus for carrying out the method can be made smaller and lighter. Can be done.

[Brief explanation of the drawing]

FIGS. 1A to 1G are explanatory diagrams showing the steps of the method of this invention in order. 1... Container, 2, 2a... Compressed object, 3.3a
... Detent plate, 4... Compressor, 5... Compression plate.

Claims (1)

[Claims] 1. (a) After storing an object to be compressed in a container, a flexible first detent plate made of a thin metal plate having a dimension slightly larger than the inner diameter of the container is placed thereon. The object to be compressed in the container is compressed together with the first detent plate toward the bottom of the container by a compression plate that is operated in conjunction with a compressor and has a size slightly smaller than the inner diameter of the container, and then the compressed material is compressed toward the bottom of the container. (b) After storing a new object to be compressed on the first detent plate in the inner space of the container obtained by the compression in step (a) above, placing a second detent plate, compressing the new compressed object together with the second detent plate toward the bottom of the container, and then raising the compression plate; c) A method for compressing and storing an object to be compressed in a container, comprising the step of repeating the above step (b) a necessary number of times. 2. Before compressing the object to be compressed in the container, fit a guard cylinder into the container and fit a guard ring into the opening of the container to suppress deformation of the container and the opening of the container when compressing the object to be compressed. The method according to claim 1, characterized in that: 3. By shaping the compression plate so that its center protrudes from the periphery, when the detent plate is pressed down with the compression plate, the center part of the detent plate is bent toward the bottom of the container. 2. The method according to claim 1, wherein the method comprises: