JPH0151405B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for discharging the contents of a drum can, and more specifically, a device for discharging the contents of a drum can, and more specifically, a device for safely discharging harmful substances such as radioactive waste filled and stored in a drum can or incineration ash of this waste from the drum can in an airtight state. This invention relates to a device for discharging the contents of a drum.

Conventionally, combustible miscellaneous solid wastes such as waste, rags, rubber, and plastics containing low-level radioactivity generated from facilities that handle radioactive materials, such as nuclear power plants, are generally treated as is or as incinerated ash. filled into drums and sealed,
It is usually stored in an appropriate location within the facility. However, with the expansion of nuclear power plants, the amount of waste being emitted is increasing dramatically, and combustible waste has to be further reduced in volume and stably solidified after incineration. Various methods have been proposed to stably solidify incinerated ash. However, when the radioactive incineration ash that is filled and sealed in a drum for this solidification process is discharged from the drum, there is a risk that the incineration ash will scatter into the air. There has been a strong desire for a device that can safely discharge the contents of a drum.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a drum can contents discharging device that can open and close the inner lid of the drum can and discharge the contents in a sealed state.

However, the gist of the present invention is to provide a drum connection port which is rotatably supported around a horizontal axis and which engages with and seals the open end of a drum to which an inner lid is attached. a storage portion formed on the opposite side of the drum connection port with respect to the axis; a discharge port opening at one end in the axial direction; and a discharge port that communicates with the storage portion and the discharge port on one side. A box body comprising a partition plate having a notch on its edge that communicates the storage portion and the drum connection port, a rotational drive device for the box body, the drum connection port and the inner lid. a lid for sealing the box from the inside; a lid driving device provided on the box for driving the lid toward and away from the drum connection port; and a lid driving device attached to the lid. a chuck device for gripping a protrusion protruding from the inner lid when the inner lid is in a sealed state; There is provided a drum can content discharge device characterized by comprising a drum can holding device for holding the drum can contents in a combined state.

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

A box 3 having cylindrical portions 1 and 2 at both ends is rotatably supported around a horizontal axis 5 by a roller 4 pivotally supported on a base frame. The bottom plate 6 of the box body 3 is provided with a drum connection port 10 that engages with the open end 9 of the drum 8 to which the inner lid 7 is attached. A gasket 11 to which 9 is pressed is attached. A box-shaped storage portion 15 is formed in the box body 3 on the opposite side of the drum can connection port 10 with respect to the axis 5, for temporarily storing the contents 14 of the drum can 8 when the box body 3 rotates. ing. Further, the cylindrical portion 1 opens outward and has a discharge port 16 concentric with the axis 5. The inside of the box body 3 is partitioned into two parts by a partition plate 17 inclined with respect to the axis 5 so as to communicate the storage part 15 and the discharge port 16. Partition plate 1
7 has a notch 18 on one side edge, and this notch 18 connects the storage portion 15 and the drum connection port 10.
are in communication. A sprocket 20 is fixed to the cylindrical portion 2 of the box 3, and a drive sprocket 2 is fixed to the shaft end of an electric motor 21 for driving the rotation of the box.
A chain 23 is wound around the sprocket 2 and the sprocket 20.

On the other hand, inside the box body 3, there is a gasket 25 for sealing the drum can connection port 10 and an inner lid 7 attached to the drum can 8.
A lid body 27 is provided with a gasket 26 for sealing. The lid body 27 consists of an annular portion 28 and a disk portion 29 with a protruding central portion, and is attached to a support plate 31 via a spring 30. This support plate 31 has a shaft 34 rotatably supported on the side walls 32 and 33 of the box body 3.
A piston rod of an air cylinder 37 attached to the side wall 32 is connected to a lever 36 fixed to an arm 35 fixed to the shaft 34 and to a protruding end of the shaft 34. Further, a chuck 38 is attached to the lid body 27, which grips the protrusion 7a fixedly protruding from the inner lid 7 when the inner lid 7 is sealed by the lid body 27.
Air cylinder 3 for opening/closing the chuck 38
9 is attached to the support plate 31. Further, as shown in FIG. 4, the lid body 27 is provided with a ring-shaped groove 41 that opens near the inner peripheral edge 40 of the drum connection port 10 and an air flow passage 42 connected to this groove 41. Line 42 is connected to an external compressed air supply and vacuum exhaust.

Also, on the outside of the bottom plate 6 of the box body 3, there is a drum holding device 5 that holds the drum 8 with the inner lid 7 attached in a state in which it is press-fitted and engaged with the drum connection port 10.
0 is set. As shown in FIGS. 4 and 5, this drum holding device 50 is guided so as to be movable back and forth by a holding pin 52 protruding from a seat 51 fixed to the bottom plate 6.
a support rod 54 provided with a claw piece 53 that engages with a;
An arm 56 is fixed to this support rod 54 and has a claw piece 55 at its tip that engages with the body 8b of the drum 8.
, an air cylinder 57 held by the bottom plate 6 and having a piston rod 57a connected to the support rod 54, and a seat 5.
1 and an air cylinder 59 whose protruding end 58 faces the upper surface of the support rod 54. These devices are arranged radially around the drum connection port 10 in appropriate numbers (the drawing shows an example of 4 sets). )
It is provided. Further, the support rod 54 is pushed down by a spring 60 when the air cylinders 57 and 59 are not operating, so that the claw pieces 53 and 55 are separated from the drum.

In addition, 61 is a fixed duct connected to the incineration ash processing equipment (not shown) in the next process, 62 is a sealing material for maintaining airtightness between this fixed duct 61 and the cylindrical part 1 of the box body 3, and 63 is a box. This is a rotary joint for supplying air to each air cylinder etc. attached to the body 3.

To use the drum can contents discharging device having the above configuration, the outer lid (not shown) of the drum can 8 is removed using another device, and the drum can 8 with the inner lid 7 attached is raised by the lifting device 64, and the open end 9 is pressed against the drum connection port 10 of the box body 3, the air cylinder 57 of the drum holding device 50 is operated to project the piston rod 57a, and the claw pieces 53 and 55 are pressed against the drum can body curled part 8a and the body part of the drum can 8, respectively. 8b. Next, air cylinder 59
When the piston rod is activated and the opposite end of the claw piece 53 of the support rod 54 is pushed down, the support rod 54 tilts in a seesaw shape using the collar at the lower end of the holding pin 52 as a fulcrum. The claw pieces 53 press and hold the barrel curled portion 8a upward, and the claw pieces 55 press and hold the copper portion 8b toward the center of the drum. At this time, the lid body 27 is connected to the drum connection port 1.
0 is in a sealed state, the space 65 between the inner lid 7 and the lid body 27 is hermetically sealed by the gasket 26, and is prevented from being contaminated by the contents of the drum 8 from now on. . Then air cylinder 39
The protrusion 7 of the inner lid 7 is activated by the chuck 38.
a, and in this state operate the air cylinder 37 to rotate the inner lid 7 upward together with the lid 27 as shown by the chain line, opening the inside of the drum 8 into the box 3. Next, drive the electric motor 21 to move the box 3 to the second position.
If the drum 8 is slowly rotated so that the side wall 32 is facing downwards as shown by the arrow in the figure, the drum 8 will begin to tilt together with the box 3, and the contents 14 of the drum 8 will be discharged from the drum 8 and will move over the side wall 32. and moves from the notch 18 of the partition plate 17 into the storage section 15. When the box 3 rotates 180 degrees and the drum 8 comes to the uppermost position, the contents 14 of the drum 8 are completely discharged and stored in the storage section 15. Subsequently, when the box body 3 continues to rotate further in the same direction, the contents 14 in the storage section 15 move from the storage section 15 along the side wall 33 onto the partition plate 17, fall, and are guided by the partition plate 17. The liquid is discharged outward from the discharge port 16 and transferred to a hopper (not shown) or the like for the next process via a fixed duct 61. After the drum reaches the uppermost position and all the contents 14 are discharged, the air cylinder 37 is operated in parallel with the rotation of the box 3 to rotate the lid 27 and the inner lid 7 in the closing direction. At this time, compressed air is supplied through the airflow passage 42 to scatter and clean dust such as incinerated ash near the inner peripheral edge 40 of the drum connection port 10, and the drum connection port 10 is hermetically sealed with the lid body 27. At the same time, the inner lid 7 is mounted and attached to the drum can 8. Thereafter, the pressure inside the airflow passage 42 is reduced to remove residual dust near the inner peripheral edge 40 by suction. When the box 3 rotates 360 degrees and returns to its initial state, the air cylinder 39 releases the chuck 38 from holding the protrusion 7a, and the drum holding device 5
0 is opened, the drum 8 is separated from the box 3, and the process of discharging one drum is completed.

The present invention is not limited to the embodiments described above, and for example, a linear motion (elevating) mechanism may be used in addition to the rotation mechanism described above as a device for moving the lid body 27 toward and away from the drum connection port 10. Further, the drum holding device 50 may also use other mechanisms. Further, in the above embodiment, the air flow passage 42 provided in the lid body 27
Since the inner circumferential edge 40 of the drum connection port 10 is cleaned by blowing and drawing air using the device, it is possible to more reliably prevent the contents 14 such as incinerated ash from scattering to the outside of the device. However, depending on the case, either the air blowing or the air intake may be omitted;
If the area of the inner peripheral edge 40 exposed to the outside is small, such as when the inner peripheral edge 40 covers most of the inner peripheral edge 40, the airflow passage 42 may be omitted.

As explained above, according to the present invention, it is possible to reliably open and close the inner lid of the drum can and discharge the contents using the same device, and in particular, since all operations can be performed in a sealed state, the outer surface of the drum can It has the excellent characteristics that the outer surface of the inner lid and the outer surface of the lid body are not contaminated by the contents, and the contents do not scatter into the atmosphere, and the contents of the drum are not dissipative. This is particularly useful when the material is hazardous, such as waste incineration ash.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a drum contents discharge device showing an embodiment of the present invention, Fig. 2 is a perspective view of the box shown in Fig. 1, and Fig. 3 is a cross-sectional view taken along line A-A in Fig. 1. , Figure 4 is an enlarged view of part B in Figure 1, and Figure 5 is an enlarged view of part C in Figure 4.
-C line sectional view. 3... Box body, 4... Roller, 5... Axis line, 7... Inner lid,
7a...Protrusion, 8...Drum can, 9...Open end, 10
... drum connection port, 11... packing, 15... storage section, 16... discharge port, 17... partition plate, 18... notch, 21... electric motor, 23... chain, 25... packing, 26... packing, 27... lid body, 37...Air cylinder, 38...Chuck, 39...Air cylinder, 40...Inner peripheral edge, 42...Air flow passage, 50...
Drum holding device.

Claims (1)

[Claims] 1. Supported rotatably around a horizontal axis,
a drum connection port that engages with and seals the open end of the drum to which the inner lid is attached; a storage portion formed on the opposite side of the drum connection port with respect to the axis; a discharge port that opens at one end of the partition plate, and a partition plate that communicates between the storage section and the discharge port and has a cutout on one side edge that communicates the storage section and the drum connection port. a box comprising a box, a rotational drive device for the box;
a lid that seals the drum connection port and the inner lid from the inside of the box; a lid drive device provided on the box that drives the lid toward and away from the drum connection port; , a chuck device that is attached to the lid and grips a projection protruding from the inner lid when the inner lid is sealed by the lid;
A drum can content discharge device comprising: a drum holding device provided on the box body and holding the drum with the inner lid attached in a state engaged with the drum connection port. 2. The drum can contents discharge device according to claim 1, wherein the lid body is formed with an air flow path for cleaning the inner circumferential edge of the drum connection port.