JP2539723B2 - Container holding cassette for liquid scintillator recovery and cleaning equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the collection of radioactive waste,
More specifically, the present invention relates to a container holding cassette used in a device for collecting and cleaning a liquid scintillator having a relatively low concentration, which is generated in liquid scintillator measurement even in radioactive waste.

[0002]

2. Description of the Related Art A radioactive waste treatment technology, particularly a recovery technology, has been remarkably developed in recent years. This is because Japan has introduced nuclear power generation, and in particular, it was an urgent task to recover the large amount of radioactive waste that is inevitably emitted by nuclear power generation. In this way, although development is in progress in terms of industrial high-concentration radioactive waste treatment technology, in other fields, such as the life science field, the technology of waste treatment is unexpectedly delayed, unlike the case described above. .

This is also because the absolute amount of radioactive waste was small, so that it did not pose a problem so much, and thus the regulation was loose, unlike the aforementioned nuclear power plants. With respect to medical technology, particularly in recent years, diagnostic and therapeutic techniques utilizing radioactive substances have been greatly developed, and as a result, the amount of radioactive substances to be disposed of has dramatically increased. For example, there is a radioactive substance that is injected into a blood vessel and used to detect a malignant tumor or the like by observing the infiltration state of the tissue.

A liquid scintillator is used to detect the presence or absence of this radioactive substance, and this liquid scintillator is usually put in a container for use. Of course, it must be disposed of after use. The small container with a lid that holds the liquid scintillator cannot be discarded as it is due to legal regulations. Therefore, the liquid scintillator, which is now a waste liquid, is collected from the container, the container is washed and the former is disposed of as waste, and the latter is reused or disposed of as waste.

However, until now, these processes have been performed manually. In other words, humans had to throw away the drain from each container and then wash each container by hand. Therefore, it sucked the scintillator evaporated during the work and was very harmful to the labor environment. Furthermore, the ability to clean is also extremely low, and in particular, uneven cleaning and mistakes in damage were unavoidable.

[0006]

The present invention is intended to solve the above problems.

An object of the present invention is to provide a container holding cassette for a liquid scintillator recovery / cleaning device, which automatically recovers a liquid scintillator which could only be done manually.

[0008]

[Means for Solving the Problems] To solve the above problems, the following means are adopted.

The first means is a container holding cassette for a liquid scintillator recovery / washing device, and both side plates (1) for elastically holding a large number of containers arranged in a line from both side surfaces of the container.
5, 61) and both side plates (15, 61) of the liquid scintillator recovery and cleaning device cassette mounting member (7, 45)
A container holding cassette for a liquid scintillator recovery / cleaning device, characterized in that it has a mounting portion (21, 22, 64) for mounting to a liquid scintillator.

[0010] which is the both side plates (15,61) the container holding face in the elastic member (17,62) liquid scintillator recovery, characterized in that a of the container holding cassettes for cleaning equipment.

Furthermore, it is preferable to provide elastic members (17, 62) having a large number of curved portions (19, 63) along the body of the container on the container holding surfaces of the side plates (15, 61).

[0012] second means, liquids scintillator recovery, a container holding cassettes for cleaning apparatus, both side plates of repression hold many aligned containers in a row from both sides of the container (1
21, 131, 141) and the side plates (121, 13).
1, 141) holding base bodies (126, 136, 14)
6) and the base (126, 136, 146) has a cassette mounting member (10) for a liquid scintillator recovery and cleaning device.
0,105,110) mounting part (124,134,1)
47) is a container holding cassette for a liquid scintillator recovery / cleaning device.

Elastic members (122, 132, 142) are preferably provided on the container holding surfaces of the side plates (121, 131, 141).

Further, it is preferable to provide elastic members (122, 132, 142) having a large number of curved portions (123, 133, 143) along the body of the container on the container holding surface.

[0015]

Since the container holding cassette functions as an integral part of the liquid scintillator recovery device by being organically incorporated, its action depends on the operation of the entire liquid scintillator recovery and cleaning device. It is understandable. The operation of the entire liquid scintillator recovery and cleaning device will be described below.

Focusing on the movement of the container, first, the container is pushed into the container holding cassette from above and a plurality of containers are aligned and held. In this case, the side plates oppose each other elastically,
It's a good idea to push the side plate out with a little hand to make it easier to put the container in. When the plurality of containers have been inserted, the container holding cassette is mounted on the cassette mounting member. When the endless belt is intermittently rotated forward, the container holding cassette mounted on the cassette mounting member moves forward. The lid of the container held in the cassette at the rear position of the endless belt is removed by the lid removing device.

At this time, the removed lid falls into the lid receiving member. After falling, the lid further drops to the net container and is stirred and washed in the lid washing tank. Next, the drain is dropped into the drain receiver and is collected in the drain receiver tank in a state where the container is oriented substantially downward due to the movement of the endless belt.
Next, in a state where the container is completely downward, a cleaning liquid is sprayed into the container to wash the inside of the container. The same washing process is performed multiple times. Preferably, it is efficient to change the cleaning liquid in each cleaning step. When the container holding cassette returns to the original position, the container holding cassette is removed from the cassette mounting member. The cassette holding member on the endless belt that has been removed and emptied is mounted, and the container holding cassette with the container packed therein is mounted.

Since the container holding cassettes are arranged side by side with the endless belt spaced, the liquid scintillator is continuously collected and washed by repeating the above-mentioned steps.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall schematic view of a liquid scintillator recovery / washing apparatus, FIGS. 2 (A), 2 (B) and 2 (C) are details of a container holding cassette, and FIG. 3 is a view showing a state in which the lid of the container held by is removed, FIG. 4 is a view seen from the direction of arrow IV in FIG. 3, and FIG.
5 is a view seen from the direction of arrow V in FIG. FIG. 1 is an overall schematic view of a liquid scintillator recovery and cleaning device, which will be described.

The endless belt 1 has a width and is composed of two chains and a member for connecting the chains. 2 at both ends of the endless belt 1.
It is supported by four sprockets 2 that mesh with the book chain. The four sprockets 2 are supported by two shafts 3, and the two shafts 3 are rotatably supported by a machine body 30 (FIGS. 4 and 5) via bearings.

On the other hand, a sprocket 4 is fixed to the shaft 3. The sprocket 4 is rotationally driven intermittently by a sprocket fixed to the output shaft of an endless belt drive motor 6 via a chain 5. A plurality of container holding cassettes 20 are held on the endless belt 1. The container holding cassette 20 is for holding a plurality of containers V at the same time. The endless belt 1 is provided with a cassette mounting member 7 (see FIG. 3) for fixing the container holding cassette 10.

The upper part of the endless belt 1 can be moved forward (to the left in FIG. 1) by the rotation of the endless belt drive motor 6. On the endless belt 1, a plurality of container holding cassettes 20 described later are arranged in parallel at regular intervals.
The container holding cassette 20 is intermittently rotated by the endless endless belt 1. Focusing on the movement of the container V, the container V moves forward in a state of facing upward, and begins to change its direction downward at the upper end end (left end in the figure) of the endless belt 1, and gradually. The angle increases until it turns downward. Then, while facing downward, rearward (Fig. 1
Back to the lower right) and move, this time, at the rear end of the endless belt 1 (the right end in FIG. 1), it starts to change its direction upwards,
The angle gradually increases, and finally it turns upward and returns to its original position.

A lid removing device 8 for removing the lid C of the container V is arranged in the vicinity of one sprocket 2 of the endless belt 1. The details of the lid removing device 8 for the containers V will be described later, but the lids C of the plurality of containers V that are linearly aligned and held in the container holding cassette 20 are arranged from one end to the other end (and vice versa). ) Is to remove one by one. A lid cleaning device 9 is disposed below the lid removing device 8, and the lid receiving member 91 steadily receives the lids C that are removed one by one and are falling.
The lid receiving member 91 is formed in a mesh shape so as to allow only liquid to pass therethrough. However, a lid cleaning tank 93 described later
You may arrange | position this inside and make it drop with a waste liquid together, and let only the cover C permeate | transmit and it may be caught by a net.

The lid C once dropped on the lid receiving member 91
Is further dropped and collected in the net container 92 in the lid cleaning tank 93. The lid cleaning tank 93 contains a washing liquid for washing the lid C, and the water level thereof is always kept at a constant level by the level switch 96. When the level exceeds a certain level, the overflow drain pipe 97 is used to receive the total waste liquid 87
Is discharged to. The waste liquid receiver 87 is appropriately discharged through the pump 86.

Further, the lid cleaning tank 93 is provided with a lid stirring blade 94. The lid stirring blade 94 is rotated by a stirring motor 95, and the washing efficiency is increased while hitting an excess current on the lid C in the net container 92. ing. The cleaning liquid for cleaning the lid C is supplied from the water supply pipe 82 through the water supply solenoid valve 83, and the drainage is drained through the drainage solenoid valve 98.

Similarly, a drain receiver 51 is arranged below the lid removing device 8 to receive the waste liquid falling from the container V. It is collected in the drain receiving tank 52 accumulated in the drain receiving 51. The drain receiving tank 52 is provided with a level switch 53 to keep the water level constant. Needless to say, when the waste liquid reaches a certain level or higher in the drain receiving tank 52, the electromagnetic valve 54 for drainage is opened and discharged, and the treatment specified by law is performed.

Below the endless belt 1, two cleaning devices, a first cleaning device 12 located on the front side (left side in the figure) and a second cleaning device 13 located on the rear side (right side in the figure), are connected in series. It is arranged. Two or more of these cleaning devices may be arranged, and in this case, the cleaning degree becomes higher. The first and second cleaning devices 12 and 13 have substantially the same structure, and have a cleaning nozzle 72 for cleaning the inside of the container V, a cleaning liquid receiver 71 for receiving the cleaning liquid after cleaning, and a cleaning liquid receiver 71. Collect cleaning liquid Cleaning liquid tank 7
4 and up.

The cleaning nozzle 72 holds the cleaning liquid in the container holding cassette 20 and is in a downward direction.
For cleaning the inside of the container V cleanly, and the cleaning liquid in the cleaning liquid tank 74 is pumped up by the cleaning pump 76 and used. It is also possible to supply the cleaning liquid from another route.

The number of the cleaning nozzles 72 is the same as the number of the containers V held in the container holding cassette 20, and the containers V of the entire cassette can be cleaned in a batch at once. The endless belt 1 is stopped during this cleaning. The cleaning liquid receiver 71 is for receiving the cleaned liquid after cleaning the inside of the container V by the cleaning nozzle 72, and the cleaning liquid accumulated therein is collected in the cleaning liquid tank 74.

The cleaning liquid tank 74 is provided with a ball tap 73 to keep the water level at a constant position. When draining, drain the waste liquid through the solenoid valve 77.
Drain to 7. Each cleaning liquid tank 7 in the first cleaning device 12 located in the front and the second cleaning device 13 located in the rear
The cleaning liquid is supplied to the nozzles 4 through the water supply solenoid valve 85 and the same water supply pipe 84.

The cleaning liquid for the first cleaning device 12 and the cleaning liquid for the second cleaning device 13 may be the same or different, and may be the same or different when three or more cleaning devices are used. Incidentally, the first and second cleaning devices 12, 13 of this embodiment
Is composed of two units, but in principle it may be one unit,
It only slightly deteriorates the degree of cleaning.

Container holding power cassette 20 FIGS. 2A, 2B, and 2C show the container holding cassette 20, FIG. 2A is a plan view, FIG. 2B is a bottom view, and FIG.
(C) is a side view. The container holding cassette 20 is formed in an elongated shape with an H-shaped cross section than two side plates 15 having an H-shaped cross section and facing each other and a bottom plate 16 connecting them. An elastic material 17 (for example, silicon rubber) is attached to each side plate so that the side surface of the container V can be elastically gripped from both sides. Elastic material 1
The curved portions 19 are formed in the number 7 corresponding to the number of containers to be held, so that the side surface of the container V can be easily gripped. Of course, the curved portion 19 may be provided on the side plate 15 itself.

A spring body 18 is provided on the leg portion 21 under the side plate 15 to give an elastic effect to the leg portions 21. Further, the rails 41 of the cassette mounting member 7 are provided on the leg portions 21.
Mounting portion or bent portion 2 so as to fit into the recess 42 of
2 is formed. Therefore, when the bent portion 22 is laterally fitted into the rail 41 of the cassette mounting member 7 and is pushed in and slid, the container holding cassette 20 is reliably mounted and set on the cassette mounting member 7.

In order to hold the container V in the container holding cassette 20, the elastic member is simply formed by digging into the spring body 18 to expand the side plates 15 and 15 and pushing the container V in order from above the cassette 20. It can be easily set due to the repression effect of 17.

Lid Removal Device 8 FIG. 3 is an enlarged view of the container holding cassette 20 and the lid removal device 8 . FIG. 4 shows the lid removing device 8 as seen from the direction of arrow IV in FIG.
5 is a top view of FIG. 5, and FIG. 5 is a view of the container lid removing device 8 as seen from the direction of arrow V in FIG. U-shaped frame member 36
Two lid removal motors 32 are arranged side by side in
Friction rollers 34 (made of silicone rubber rollers) are provided to the output shafts 40 and 40, respectively, via reduction gears 33 on the lid removing motor 32. When the friction roller 34 rotates, the lid C is rotated by the frictional force and released from the container V. The number of the friction rollers 34 is not limited to two, but may be one as long as it has a pressure bonding force.

The pressing roller 3 is attached to the tip of the frame member 36.
5, the side plate 15 of the container holding cassette 20 is provided.
It is pinched from the side and pressed. That is, the friction roller 34
When the lid C is rotated between them, the container V is hung and pressed so as not to rotate and rotate. of course,
The pressing roller 35 has the same effect even when pressing the side plate 15 of the container V, and such a structure may be adopted.

Ball nut 39 fixed to the frame member 36
Is engaged with a feed screw 31, and the feed screw 31 is attached to the machine base 30 (see FIGS. 4 and 5) along the length direction of the container holding cassette 20. The feed screw 31 is used to remove the lid drive motor 3 attached to the machine base 30.
7 (FIG. 4) is rotated through the sprocket, chain, and sprocket. Since the nut 39 is moved by the rotation of the lid removing drive motor 37, the entire frame member 36 moves along the axial direction of the feed screw 31. That is, the lid removing device 8 moves along the length direction of the container holding cassette 20. During this movement, the lid removing motors 32, 32 are driven to remove the lid C from the container V.

The guide rod 38 (FIGS. 3 and 4) is provided on the machine base in parallel with the feed screw 31, and guides the lid removing device 8 accurately along the feed screw 31. Therefore, the friction roller 34 is rotated by the drive of the lid removing motor 32, and when the lid C of a certain container V is removed, the lid removing movement motor 3
By driving 7, the entire frame member 36 moves to the next container V position. Then, the lid C of the container V is removed. In this way, the containers V held in the container holding cassette 20 one after another
Remove the lids C of one after another.

[0039]

[Second Embodiment] A second embodiment will be described with reference to FIG. The container holding cassette 60 is one in which both side plates 61 intersect each other in the middle and is rotatably attached with a shaft 65, and is in the shape of scissors. Inside the side plates 61, 61, elastic members 62 are attached and curved portions 63 that match the curvature of the body of the container V are provided at appropriate intervals. Side plate 61,
Since the leg portions 67, 67 of 61 are provided with the spring body 66, the leg portions 67, 67 work to open, and the holding portions of the container V try to draw each other.

At the tips of the legs 67, 67, bent portions 64,
Since 64 is provided, the bent portions 64, 64 are laterally inserted into the recesses 47 of the rails 46 of the cassette device member 45 to firmly attach the container holding cassette 60 and the cassette mounting member 45 on the endless belt 1. Of.

[0041]

[Third Embodiment] A third embodiment will be described with reference to FIG. In this container holding cassette 120, a side plate 121 is movably attached to a column 125 of a base 126 by a guide rod 127, but a spring body 128 that acts in the pulling direction.
Since it is attached via both side plates 121, 121
They will attract each other. Container holding cassette 1
To attach 20 to the endless belt, the bottom plate 124 of the base 126 is laterally inserted into the attachment portion of the cassette mounting member 100, that is, the recess 102 of the rail 101, and then the holding clip 103 is rotated to fix the bottom plate 124. .
The container holding cassette 120 can be easily and securely attached to the cassette mounting member 100.

[0042]

[Fourth Embodiment] A fourth embodiment will be described with reference to FIG. This container holding force cassette 130 is a modified example in which a part of the third embodiment is modified. When the container holding cassette 130 is mounted on the cassette mounting member 105, the bottom plate 134 of the base 136 is laterally inserted into the cassette mounting member 130. The bottom plate 134 fits into the recess 107 of the rail 106, which is the mounting portion of the cassette mounting member 130, and the container holding cassette 130 is mounted to the cassette mounting member 105 quickly and easily. In this case, the pressing claw 108 as in the embodiment shown in FIG. 8 can be used. That is, the other end of the cassette mounting member 105 may be the pressing claw 108 instead of the recess 107.

[0043]

[Fifth Embodiment] A fifth embodiment will be described with reference to FIG. One side plate 141, 1 of the container holding force cassette 140
41 is arranged on the upper part of the body 146, and one side plate 141 is movably attached by a guide rod 147. However, since the springs 148 are attached to each other, the side plates 141 are attracted to each other. The engaging portion 147 of the leg portion 146 of the base 145 is attached to the mounting portion of the cassette mounting member 140, that is, the recess 112 of the rail 111.
The container holding cassette 140 is attached to the cassette mounting member 110 by inserting the container holding cassette 140 from the vertical direction.

[0044]

As described in detail above, since the liquid scintillator, which has been conventionally only possible by manual operation, can be mechanically batch-processed by using a cassette holding a large number of containers, The process can be performed in a good environment for labor hygiene, and uneven cleaning and damage errors can be avoided, so the cleaning ability is extremely high and highly efficient recovery processing is possible.

Further, since the containers can be prepared by packing the containers in advance in the container holding cassette, the external setup is simple and the time efficiency is drastically increased. Furthermore, the container can be easily packed by simply pushing it into the container holding cassette.
In addition, the cassette holding member can be easily attached to the container holding cassette with a simple structure, so that there are very few failures.

[Brief description of drawings]

FIG. 1 is an overall schematic view of a liquid scintillator recovery and cleaning device.

FIG. 2A is a plan view of a container holding cassette. FIG. 2B is a bottom view of the container holding cassette.
FIG. 2C is a side view of the container holding cassette.

FIG. 3 is an enlarged view of the lid removing device.

FIG. 4 is a top view of the lid removing device as viewed from the direction of arrow IV in FIG.

FIG. 5 is a side view of the lid removing device as seen from the direction of arrow V.

FIG. 6 is a second embodiment of the container holding cassette.

FIG. 7 is a third embodiment of the container holding cassette.

FIG. 8 is a fourth embodiment of the container holding cassette.

FIG. 9 is a fifth embodiment of the container holding cassette.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Endless belt, 5 ... Drain collection device, 7 ... Cassette mounting member, 8 ... Lid removing device, 9 ... Lid cleaning device, 12 ...
First cleaning device, 13 ... Second cleaning device, 20, 60, 12
0, 130, 140 ... Container holding cassette

Claims (6)

(57) [Claims] 1. A container holding cassette for a liquid scintillator recovery / cleaning device, comprising: both side plates (15, 61) for elastically holding a large number of containers arranged in a line from both side surfaces of the container; And a mounting portion (21, 22, 64) for mounting the liquid scintillator collecting and cleaning device on a cassette mounting member (7, 45) of the cleaning device. Holding cassette. 2. The method of claim 1, the elastic member to the container holding face of the side plates (15,61) (1
7. A container holding cassette for a liquid scintillator recovery and cleaning device, characterized in that 3. The elastic member (1) according to claim 1, wherein the container holding surfaces of the side plates (15, 61) have a large number of curved portions (19, 63) along the body of the container.
7. A container holding cassette for a liquid scintillator recovery and cleaning device, characterized in that 4. A liquid body scintillator recovery, a container holding cassettes for cleaning apparatus, both side plates of repression hold many aligned containers in a row from both sides of the container and (121, 131, 141), the two side Bases (126, 136, 146) holding the plates (121, 131, 141), and cassette mounting members (100, 10) of the liquid scintillator recovery and cleaning device on the bases (126, 136, 146).
5, 110), and a container holding cassette for a liquid scintillator recovery / cleaning device, which has an attachment portion (124, 134, 147). 5. The liquid scintillator recovery / cleaning device according to claim 4, wherein elastic members (122, 132, 142) are provided on the container holding surfaces of the side plates (121, 131, 141). Container holding cassette. 6. The curved portion (12) according to claim 4, wherein the curved surface (12) of the container holding surface extends along the body of the container.
3, 133, 143) having a large number of elastic members (122,
132, 142) is provided, and a container holding cassette for a liquid scintillator recovery / cleaning device.