JPS598238Y2 - Processing equipment for radioactive contaminated waste, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a processing apparatus for radioactive contaminated waste, etc.

Radioactive contaminated waste from nuclear power plants and the like is often packed and stored in drums, but in recent years the amount has become enormous and its disposal has become a problem.

As one of the countermeasures, there has recently been a movement to reduce the volume of radioactively contaminated waste by incinerating combustible materials, and several incinerators have already been installed at nuclear power plants. .

This type of incinerator usually has a device for discharging the contents of the drum, and the radioactive contents such as cloth, polyethylene sheets, wood chips, etc. discharged by this device are fed into the incinerator. .

By the way, the contents packed in the drum can are various and the storage conditions (packing conditions) are also diverse, such as high compression packing, low compression packing, bagging, and bare packing.

Therefore, it is quite difficult to design the ejection mechanism of the ejection device to suit each situation.

Therefore, the present invention proposes a processing apparatus for radioactive contaminated waste, etc., which can reliably discharge the contents from a drum can under any conditions.One embodiment of the apparatus will be described below with reference to the drawings.

In FIG. 1, 1 indicates a lower floor and 2 indicates an upper floor.

A surrounding wall 3 is provided on the lower floor 1, and within this surrounding wall 3, a processing chamber 5 and a processing preparation chamber 6 are formed by partition walls 4.

The compartmental chamber 4 is provided with a first opening/closing door 7 that allows communication and isolation between both chambers 5 and 6, and the surrounding wall body 3 is provided with a second opening/closing door 8 that allows communication and isolation between the processing preparation chamber 6 and the outside. is provided.

Reference numeral 9 denotes a platform-type movable body that can travel between the two chambers 5 and 6, and a drive-type conveyor device 10.11 that is provided between the two chambers 5 and 6 with the first opening/closing door 7 inside. placed on top.

Both conveyor devices 10 and 11 adopt a format in which motor pulleys 12 and gravity rollers 13 that can be driven in forward and reverse directions are arranged alternately. are designed to be in contact with each other.

Note that both conveyor devices 10 and 11 are driven forward and backward by remote control, etc., but this is done by detecting the movable body 9 with a limit switch, etc., and setting the required minimum number of motor pulleys 1.
2 may be automatically driven.

The movable body 9 is provided with a lid pressing and holding device 14 as shown in FIGS. 2 to 4.

That is, the lid body pressing and holding device 14 consists of a cylinder 16 that is attached downward to a frame 15 that stands up from the movable body 9, and an electromagnet 18 that is attached to the piston rod 17 of the cylinder 16. It is possible to approach and separate from the enemy.

Furthermore, on the movable body 9, there is a guide member 19 along the moving direction of the movable body, and a guide receiving member whose processing chamber 5 side is parallel to this guide member 19 and whose processing preparation chamber 6 side is curved so as to approach the guide member 19. These members 19 and 20 are placed horizontally so that the container (drum can) 21 can be slid and positioned.

Further, a container pushing device 22 is provided on the movable body 9.

This container pushing device 22 consists of a cylinder 23 in the moving direction of the movable body and a curved pushing tool 25 attached to its piston rod 24, and this curved pushing tool 25 comes into contact with the side surface of the positioned container 21. The container 21 is pushed out to the processing chamber 5 side.

Furthermore, the movable body 9 is provided with a hydraulic unit 26 for both cylinders 16.23.

Further, on both sides of the movable body 9, idle rollers 28 are provided which are in contact with side slip prevention rails 27 provided in both chambers 5 and 6 from the inside.

As shown in FIG. 1, a conveyor device 1 in a processing chamber 5
At the forward position of 0, there is a chute 2 that penetrates the lower floor 1.
A container gripping device 31 is provided above the chute 29 and is rotatable around a horizontal axis 30 perpendicular to the moving direction of the movable body.

That is, as shown in FIGS. 2, 3, and 5, the container gripping device 31 includes a pedestal 32 erected on one side of the chute 29, and a rotary actuator 33 attached to this pedestal 32.
, a rotary drive shaft 36 connected to the rotating shaft 34 and supported by a bearing 35 and located on the horizontal axis 30, a pedestal 37 erected at the other end of the chute 29, and a cylinder attached to the pedestal 37. 38, a piston rod 39 provided in this cylinder 38 and capable of moving in and out and rotating on the horizontal axis 30, and these piston rods 39 and the rotation drive shaft 3.
supporting members 40 and 41 attached to opposing ends of the piston rod 6; The U-shaped receiving frame 42 is located above the chute 29 and forms the bottom receiving surface of the container 21, and the supporting member 40.41 has concave clamping surfaces 40A and 41A.

Further, above the chute 29, an internal stirring device 4 is provided.
3 is provided.

That is, this in-container stirring device 43 is as shown in FIG. 2, FIG.
As shown in FIGS. 5 to 10, a plurality of lifting cylinders 44 (four in the embodiment) are installed on the lower floor 1 surrounding the chute 29, and these piston rods 4.
A movable member 46 attached between the upper ends of the movable member 4
a downward mount 47 mounted on the lower surface of 6 and directly above the chute 29; and a claw opening/closing cylinder 4 mounted downward on the lower surface of the movable member 46 to be located within this downward mount 47.
8, an elevating plate 50 attached to the piston rod 49, a guide rod 51 attached to the downward mount 47 to guide the elevating plate 50, and a horizontal shaft 5 attached to the lower end of the downward mount 47.
A pair of left and right claws 53A, 5 swingably mounted via 2
3B, these claws 53A, 53B, and the elevating plate 50.
The number of claws 53A, 53B can be changed to three or more.

A container pushing device 55 is provided above the chute 29.

That is, a cylinder 56 is provided at a position facing the end of the conveyor device 10 with the chute 29 inside, and a curved pushing tool 58 is attached to the piston rod 57 of the cylinder 56.

Note that a guide 59 is provided at the mounting position of the container pushing device 55.

In FIGS. 1 and 2, 60 is a lid of the container 21, and a lid fastening fitting (not shown) is provided between the two.

61 indicates radioactive content.

62 is a power supply, and 63 is a control unit. Reference numeral 64 denotes a fixed contact piece provided at the end of the conveyor device 10, and when a movable contact piece 65 attached to the movable body 9 comes into contact with the fixed contact piece 64, electricity is supplied to the movable body 9 side of the processing chamber 5.

Reference numeral 66 indicates a current supply structure in the processing preparation chamber 6.

Next, the processing work will be explained.

Using various conveyance devices such as elevators and electric hoists,
The container 21 is being carried onto the upper floor 2.

At this time, the empty movable body 9 is in the processing preparation room 6, and the
The opening/closing door 7 is closed, and the second opening/closing door 8 is opened.

In this state, a worker brings the container 21- into the processing preparation room 6 and places it on the movable body 9.

At this time, since the container 21 is guided by both members 19 and 20 and received by the guide receiving member 20, it is automatically aligned in front of the container pushing device 22 as shown by the solid line in FIGS. 2 and 3. Ru.

Next, the movable body 9 is energized via the energizing structure 66, and the hydraulic unit 26 is operated.

After reaching a predetermined pressure, the cylinder 16 is extended, and the electromagnet 18 is lowered and pressed against the lid 60 as shown by the imaginary line in FIG.

With the lid 60 pressed against the container 21 in this manner, the lid tightening fitting is manually removed.

Next, after the worker disconnects the current-carrying structure 66 and goes outside, the second door 8 is closed and the first door 7 is opened.

The movable body 9 is driven by both conveyor devices 10 and 11.
After automatically traveling into the processing chamber 5, the first opening/closing door 7 is closed.

The movable body 9 is stopped with its movable contact piece 65 in contact with the fixed contact piece 64, as shown by the imaginary line in FIG.
8 to attract the lid body 60, the cylinder 16
is contracted to raise the electromagnet 18, and the cap 60 which is attracted thereto is removed from the container 21 and raised.

Then, the cylinder 23 of the container extrusion device 22 is activated,
The container 21 is pushed back by the advancing curved pusher 25 and the U
Pass it on the form receiving frame 42.

At this time, the clamping member 40 is spaced apart from the clamping member 41, so that the container 21 can be easily positioned between the two members 40,41.

The cylinder 38 is then extended and the supporting member 40 is advanced, so that the container 21 can be self-aligned and fixed by both supporting members 40,41.

Next, the stirring operation and the discharging operation are performed in the following order.

(a) The claws 53A, 5 are opened by the operation of the claw opening/closing cylinder 48.
Lifting cylinder 44 with 3B slightly swung inward.
is contracted, and the lower ends of the claws 53A, 53B are pushed into the upper part of the container 21, as shown in FIG.

(b) The claws 53A and 5 are opened and closed by the operation of the claw opening/closing cylinder 48.
3B is opened outward, and these claws 53A, 53B are pressed against the inner wall of the container 21, as shown in FIG.

(c) Contract the lifting cylinder 44, and each claw 53A, 5
3B is lowered while contacting the inner wall of the container, and the radioactive contents 61 are introduced as shown in FIG.

(2) The claws 53A, 5 are opened and closed by the operation of the claw opening/closing cylinder 48.
3B inward to grasp the radioactive contents 61 as shown in FIG.

(E) Due to the extension of the lifting cylinder 44, the claws 53A, 53
B is raised, and the radioactive content 61 that has been grabbed is taken out from inside the container 21 and lifted.

(f) Open the claws 53A and 53B outward and remove the radioactive contents 6.
1 is dropped into the container 21.

(g) The rotary actuator 33 is operated to rotate the container 21 together with the U-shaped receiving frame 42 and supporting members 40 and 41 by 180 degrees around the horizontal axis 30, so that the container 21 is rotated 180 degrees as shown in the imaginary lines in FIGS. 2 and 5. 21 facing downward, the radioactive contents 61 picked out earlier are dropped into the chute 29.

Although there is a risk that a portion of the radioactive contents 61 may fly out during rotation, this is guided to the chute 29 via the guide 59.

(H) After a certain period of time has elapsed, the rotary actuator 33 is operated again to invert the container 21 by 180 degrees and return it to its original position.

The above operations (a) to (h) are repeated, and at this time, the penetration distance of the claws 53A and 53B in the step (c) increases step by step, and in the final cycle, the tips of the claws touch the bottom of the container. will be reached.

In the final cycle and in the state shown by the imaginary lines in FIGS. 2 and 5, a high-pressure jet water cleaning device (not shown) provided on the chute 29 side operates to clean the inside of the container 21.

After completion of draining and cleaning, the container 21 is turned upward, and the cylinder 38 is contracted to release the support by the supporting members 40, 41.

Then, actuate the cylinder 56 of the container pushing device 55,
The empty container 21 on the U-shaped receiving frame 42 is pushed onto the movable body 9 by the advancing curved pushing tool 58.

At this time, the container 21 is guided by both members 19 and 20 and received by the guide receiving member 20, so that it is at a fixed position facing the lid pressing and holding device 14.

Next, the cylinder 16 is extended, the lid 60 is lowered and fitted into the container 21, and then the electromagnet 18 is de-energized.

Then, open the first opening/closing door 7 and convey both conveyor devices 10.11.
After the movable body 9 is put into the processing preparation chamber 6 via the first opening/closing door 7, the first opening/closing door 7 is closed.

Next, the second opening/closing door 8 is opened, a worker enters, and the lid body tightening fitting is fitted to integrate the container 21 and the lid body 60.

After the electromagnet 18 is raised by contraction of the cylinder 16, the empty container 21 is taken out from above the movable body 9.

As described above, according to the present invention, it is possible to reliably discharge radioactive contaminated waste, etc., by opening and closing the lid of the container, stirring the inside of the container, and reversing the container in a sealed processing chamber. The internal stirring device makes it possible to always ensure that the liquid is discharged regardless of the state in which it is stored in the container.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a vertical side view;
Figure 2 is a vertical sectional side view of the main part, Figure 3 is a cutaway plan view of the same part, Figure 4 is a sectional view taken along line A-A in Figure 2, and Figure 5 is B-B in Figure 2.
-B sectional view, FIG. 6 is a side view of the stirring device in the container, FIG. 7 is a partially cutaway front view of the same, FIG. 8 is a C-C sectional view in FIG. 6, and FIG. 9 is a DD cross-section in the same 10 are sectional views taken along the line EE, and FIGS. 11 to 15 are sectional views of main parts showing working conditions. 5... Processing room, 6... Processing preparation room, 9
...... Movable body, 14... Lid pressing and holding device, 18... Electromagnet, 21... Curved container, 22...
... Container extrusion device, 29 ... Chute, 30 ... Horizontal axis, 31 ... Container gripping device, 33 ... Rotary actuator evening,
40.41... Supporting member, 42...U
Shape receiving frame, 43... Container stirring device, 53A, 5
3B...Claw, 55...Container pushing device, 60...Lid, 61...Radioactive contents.

Claims (1)

[Scope of utility model registration request] A movable body that can travel between the processing preparation room and the processing room is provided,
This movable body is provided with a lid pressing and holding device and a container pushing device, and above a chute provided in the processing chamber, a container gripping device and a container stirring device that are rotatable around a horizontal axis are provided, A device for processing radioactive contaminated waste, etc., further comprising a container pushing device provided above the chute.