JPS6322560B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a used filter processing device that separates a used frame type filter into a wooden frame and a filter medium.

At all nuclear facilities that use radioactive materials, including nuclear power plants, high-performance air filters are used to remove radioactive components.
The amount of used filters generated as radioactive contaminants is increasing year by year. In order to minimize the storage space for used filters, a volume reduction process is performed when used filters are disposed of.

For example, the above-mentioned high-performance air filter is a so-called frame-type filter, that is, a filter material such as glass fiber is loaded into a rectangular cylindrical wooden frame and is adhered to the inner wall of the wooden frame with an adhesive. structure, the volume has conventionally been reduced in the following manner. First, the filter medium part of the frame-type filter is punched out using a push plate that moves up and down using hydraulic pressure, etc., and separated from the wooden frame part.Then, the filter medium part is subjected to compression treatment or melting treatment in a melting furnace. The volume is reduced by incineration after crushing using this equipment.

However, as mentioned above, when the wooden frame of a frame-type filter and the filter medium are separated by punching with a press plate,
At that time, the wooden frame and filter medium were torn, and radioactively contaminated pieces of wood and filter medium were scattered, contaminating the working environment. In addition, some of the filter media may be left behind attached to the wooden frame, and in such cases, problems such as inconvenience may occur when the wooden frame is incinerated because the filter media is nonflammable. It was hot.

This invention was made in order to solve the above-mentioned problem, and by separating the filter medium from the wooden frame by pressing the boundary between the wooden frame and the filter medium of the frame-type filter with a thin blade, it is possible to To provide a used filter processing device that eliminates the scattering of wood chips and filter media pieces, eliminates a part of the filter media from being left behind in the wood chips, and allows easy separation of a wooden frame and filter media. With the goal.

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

FIG. 1 and FIG. 2 show an example of a high-performance air filter (hereinafter referred to as a frame filter) 1 that is a target of the processing of the present invention. This frame-type filter 1 has filter media 1b made of glass fibers folded in multiple layers inside a square cylindrical wooden frame 1a, and the filter media 1b made of glass fibers are kept at intervals by separators 1c made of aluminum, asbestos, kraft paper, etc. It is glued to the inner wall of the

FIGS. 3 to 7 show an embodiment of the present invention.

The apparatus of this embodiment includes a filter media separation unit 2 that separates the frame filter 1 into a wooden frame 1a and a filter media 1b, and a filter media separation unit 2 disposed on one side of the filter media separation unit 2 for carrying in and out the frame filter 1. A conveying unit 3 and a cylinder rod 4a, which is disposed on one side of the filter medium separation unit 2 along with the conveyance unit 3 and is conveyed by the conveyance unit 3, are moved to the filter medium separation unit by a cylinder rod 4a that moves forward by hydraulic pressure or air pressure. 2, and the wooden frame 1a of the frame type filter 1, which is disposed on the other side of the filter media separation unit 2 and from which the filter media 1b has been separated by the filter media separation unit 2, are advanced by hydraulic pressure, pneumatic pressure, etc. The extrusion unit 5 is pushed out onto the conveyor unit 3 by the cylinder rod 5a, and the radioactivity slightly generated when the filter media separation unit 2 separates the frame type filter 1 into the wooden frame 1a and the filter media 1b. It consists of a transparent hood 6 that prevents the spread of dust.

The filter media separation unit 2 includes a filter support 7 disposed at the center of its lower part and housing and holding the frame filter 1 with the opening side of the square cylindrical wooden frame 1a up and down, and a filter support 7 at the bottom of the filter support 7. A rotary indexing device 8 that rotates the filter support base 7 arranged in the frame-type filter 1 by a fixed angle in the horizontal direction around the cylindrical center of the frame-type filter 1; A frame type filter 1 is disposed above the filter support base 7 and is supported by the filter support base 7 by inserting a pair of opposing thin blades 9 into the frame type filter 1.
The boundary between the wooden frame 1a and the filter medium 1b, that is, the filter medium 1b
and a filter medium cutting device 10 which cuts the boundary between the wooden frame 1a or the wooden frame 1a side slightly beyond the boundary; and a filter medium cutting device 10 which is provided vertically movably between the pair of thin blades 9, 9, and cuts away from the wooden frame 1a. Separated filter medium 1
A filter medium discharging device 11 for dropping the filter medium b to below the filter support stand 7 is provided.

The filter support base 7 is integrally formed with a square cylindrical support base body 7a that is open in the vertical direction corresponding to the shape of the wooden frame 1a of the frame-type filter 1, and a lower part of this support base body 7a. The frame-type filter 1 is fixed without covering the opening of the frame-type filter 1. On the upper and lower sides of each of the walls constituting the support body 7a, there are walls that abut against the open end (wooden end) of the wooden frame 1a of the frame-type filter 1 and extend in the vertical direction of the frame-type filter 1. Steps 12 are formed to restrict movement, and the inner dimensions of the openings 13 and 14 provided above and below the support base body 7a by these steps 12 are as large as those of the wooden frame 1a.
It is smaller than the outer dimensions of the wooden frame 1a and larger than the inner dimensions of the wooden frame 1a. Further, among a pair of horizontally opposing walls of the support body 7a, one is provided with an insertion opening 15 for allowing the frame filter 1 to enter and exit, and the other is provided with the cylinder rod 5a of the extrusion unit 5. A push-out port 16 is provided that can be inserted. Further, in the wall portion facing perpendicularly to the opposing direction of the insertion port 15 and the extrusion port 16, the elasticity of a built-in spring causes the wall portion to protrude toward the wooden frame 1a side, thereby extending the horizontal direction of the wooden frame 1a. Clamps 17 are provided to restrict movement.

The rotary indexing device 8 includes a base 8a having a circular slideway (circumferential guide rail) 18, and is rotatably supported on the upper part of the base 8a via the circular slideway 18. A circular table 8b to which the flange portion 7b is screwed, and a Geneva gear 8 meshed with the circular table 8b via driving pins 19 provided at equal angular intervals on the outer periphery of the circular table 8b.
c, and a ratchet mechanism 8d that rotates the Seneba gear 8c by a fixed angle (90° in the figure) in one direction.
It is equipped with

The center of the base 8a and the circular table 8b has an opening 2 corresponding to the filter support base 7.
0 and 21, and a chute 22 that serves as a passage for the filter medium 1b dropped downward by the filter medium discharging device 11. This chute 22 guides the falling filter medium 1b to the next processing step, such as compression processing or melting processing.

The ratchet mechanism 8d is connected to the Geneva gear 8.
a stopper 23 for preventing rotation of gear c; a ratchet wheel 25 fixed to the rotating shaft 24 of the Geneva gear 8c and having a plurality of notches 25a on the outer periphery;
A ratchet main body 26 rotatably supported by the rotating shaft 24, and a fixed base 2 integrated with the base 8a.
A clevis type cylinder 2 has a cylinder main body fixed to 7 and a cylinder rod is connected to the ratchet body 26 via a pin 28 to rotate the ratchet body 26 around a rotating shaft 24.
9 is attached to the ratchet body 26 and is pressed by a spring 30 to protrude into the notched groove 25a of the ratchet wheel 25. As the ratchet body 26 reciprocates, the ratchet wheel 25 is moved in one direction (clockwise in FIG. 7). The ratchet main body 26 is provided with a pawl 31 that rotates the ratchet main body 26 only in a direction (direction), and positioning stoppers 32 and 33 that restrict the range of rotation of the ratchet main body 26.

The stopper 23 is made of a fluid cylinder, and the tip 23a of the cylinder rod is inserted into the radial groove 34 of the Geneva gear 8c to prevent the Geneva gear 8c from rotating.

Therefore, in the ratchet mechanism 8d,
After retracting the tip 23a of the stopper 23 from the radial groove 34 of the Geneva gear 8c, the clevis type cylinder 29 is operated to move the ratchet body 26 to the seventh position.
When the latch wheel 25 is rotated from the position where it abuts the positioning stopper 32 as shown by the solid line in the figure to the position where it abuts the positioning stopper 33 as shown by the two-dot chain line, the ratchet wheel 25 is rotated 90 degrees clockwise by the pawl 31. The ratchet wheel 25 is rotated, and the rotating shaft 2
The Geneva gear 8c connected via the sixth
The circular table 8b is rotated 90 degrees clockwise in the figure, and accordingly, the circular table 8b is rotated counterclockwise by a certain angle (in this embodiment, 22.5 degrees as described later).
Subsequently, when the clevis type cylinder 29 operates and the ratchet body 26 rotates counterclockwise in FIG. 7 and returns to the position where it abuts the positioning stopper 32, the ratchet wheel 25 and the Geneva gear 8
c is fixed by a stopper 23, and the pawl 31 pushes back the spring 30, slides out of the notched groove 25a of the ratchet wheel 25, and fits into the next groove located counterclockwise in FIG. By repeating these operations four times, the circular table 8b is rotated at a predetermined angle (90° in this embodiment) counterclockwise in FIG.
be rotated.

A rod support 35 is provided around the base 8c and protrudes in all directions. Guide rods 36 are vertically provided on these rod supports 35. The upper ends of these guide rods 36 are
They are connected to each other by an upper frame 37.

The filter medium cutting device 10 includes the upper frame 3
A ram 40 is supported so as to be movable up and down along the guide rod 36 by hydraulic cylinders 38 and 39 attached to the ram 40, and a pair of thin blades 9 and 9 are attached to the ram 40 via a blade holder 41. It has a supported structure. The blade width dimension l ₁ of these thin blades 9 is selected within the range of l ₂ /2≦l ₁ ≦l ₂ with respect to the inner dimension l ₂ of one side of the wooden frame 1a.

The blade holder 41 includes a saddle 41b that is fixed to the ram 40 and has a slideway (dovetail) 41a formed along the opposing direction of the pair of thin blades 9, 9, and a dovetail groove 41 that fits into the dovetail 41a.
The blade holding member 41e is movably supported by the saddle 41b and has a thin blade 9 screwed thereto via a backing plate 41d.

An operating handle 42 is provided on the saddle 41b. This operation handle 42 is arranged facing the operation door 6a of the hood 6, and when rotated, it moves the blade holding member 41e holding the thin blade 9 in the direction opposite to the thin blade 9. to adjust the spacing between the thin blades 9,9. That is, a screw gear 43 is fixed to the handle shaft 42a of the operating handle 42, and this screw gear 4
3 is a screw shaft 4 rotatably supported within the saddle 41b with its axis directed in the direction in which the thin blades 9, 9 face each other.
A screw gear 45 fixed to 4 is engaged with the screw gear 45. The threaded shaft 44 has a left-hand thread and a right-hand thread on both ends thereof, and a nut block 46 fixed to the blade holding member 41e is screwed into each of these threaded portions. The reason why the thin blades 9, 9 are configured to be movable in opposite directions is to make it easier to deal with the case where the thickness of the wooden frame 1a differs depending on the manufacturer.

Further, the dovetail groove 41c of the knife holding member 41e described above
is the gap adjustment jib 4 screwed inside.
The width can be adjusted by changing the thickness of the plate 7.

Further, the filter medium discharge device 11 is connected to the upper frame 3.
A push plate 11a is provided at the tip of a cylinder rod 48a of a fluid pressure cylinder 48 supported by The wooden frame 1a is lowered as the cylinder rod 48a moves forward, and the wooden frame 1a is
The filter medium 1b cut and separated from the filter medium 1b is dropped into the chute 22.

The hood 6 also includes an exhaust device (not shown).
is provided. This exhaust device suctions and purifies the air in the hood 6 and discharges it to the outside through a main duct (not shown) to prevent the diffusion of radioactive dust generated when cutting and separating the filter medium 1b from the wooden frame 1a.

Although the details are omitted, the above-mentioned processing device is equipped with an automatic control operation panel composed of a sequence control circuit, and when a switch button on the automatic control operation panel is turned on,
, all operations are automatically performed except for the operation of adjusting the distance between the thin blades 9, 9 by operating the operating handle 42.

Hereinafter, the operation of the above-mentioned used filter processing apparatus will be explained based on FIGS. 3 to 8.

First, operate the operating handle 42 to adjust the spacing between the thin blades 9, 9 to the dimensions of the wooden frame 1a of the frame-type filter 1 (the spacing between the thin blades 9, 9 should be slightly larger than the inner dimension of the wooden frame 1a). ).

Next, when the switch button on the automatic control panel is turned on, the transport unit 3 is activated and the frame filter 1, which has been used in a nuclear facility and is contaminated with radioactivity, is transported to the front of the push unit 4. Subsequently, the cylinder rod 4a of the push-in unit 4 moves forward and inserts the frame-shaped filter 1 until it hits the inner frame of the filter support base 7. After the insertion operation is completed, the cylinder rod 4a returns to its original position. Note that the inserted frame-type filter 1 is fixed by the spring force of a clamper 17 provided on the filter support base 7. Next, insert the filter medium 1b of the frame type filter 1 into the wooden frame 1.
Work is done to separate it from a. First, the piston rods of the hydraulic cylinders 38, 39 move forward and the ram 40 descends. Therefore, the thin blades 9, 9 attached to the ram 40 via the blade holder 41
is lowered and pushes a part of the boundary between the wooden frame 1a and the filter medium 1b as shown in FIG. 8A. After the push-off, the cylinder rods of the fluid pressure cylinders 38 and 39 move back, and the thin blade 9 returns to its original position. Subsequently, the rotary indexing device 8 operates to rotate the filter support base 7 by 90 degrees counterclockwise in FIG. 6 to the state shown in FIG. 8B. Next, in the order shown in FIG. 8, the operation of pressing the filter with the thin blade 9 and rotating the filter support base 7 by 90 degrees counterclockwise is repeated, so that the entire circumference of the boundary between the wooden frame 1a and the filter medium 1b is removed. The pressed wooden frame 1a and the filter medium 1b are separated.

The operation of rotating the filter support base 7 by 90 degrees is performed as follows. First, the tip 2 of the stopper 23 that prevents the Geneva gear 8c from rotating.
3a retracts, and the radial groove 3 of the Geneva gear 8c
4 and the stopper 23 are disengaged. Subsequently, the clevis type cylinder 29 is extended and the ratchet body 2
When the ratchet wheel 6 is rotated to a position where it abuts the positioning stopper 33, the ratchet wheel 29 is rotated through 90 degrees via a pawl 31 fixed to the ratchet body 26. Therefore, the Geneva gear 8c, which is formed integrally with the ratchet wheel 25 through the rotation shaft 24, rotates 90 degrees clockwise in FIG. The circular table 8b that is engaged with each other rotates, and the filter support base 7 fixed to this circular table 8b rotates. The rotation angle of the filter support base 7, that is, the rotation angle of the circular table 8b at this time, is determined by the arrangement of the drive pins 19, and when there are 16 drive pins 19 as in this embodiment, is 22.5°. Continuing, the above-mentioned stopper 2
The tip 23a of 3 is the radial groove 3 of the Geneva gear 8c.
4 and restricts the rotation of the ratchet wheel 25 together with the Geneva gear 8c, and then the cylinder rod of the clevis type cylinder 29 retreats and the ratchet body 26 moves to the positioning stopper 32 in FIG.
is returned to its original position in contact with the At this time, nail 3
1 pushes back the spring 30, slides out of the notched groove 25a of the ratchet wheel 25, and fits into the next notched groove 25a located counterclockwise in FIG. The above-mentioned advance and retreat of the cylinder rod of the clevis type cylinder 29 is repeated four times, and as a result, the circular table 8
Together with b, the filter support base 7 is rotated 90 degrees clockwise in FIG. 6, and one cycle operation is completed.

When the cutting and separation work of the wooden frame 1a and the filter medium 1b is completed as described above, the fluid pressure cylinder 48 is then
The cylinder rod moves forward and the push plate 11a descends, pushing out the pressed filter medium 1b from the wooden frame 1a and dropping it into the chute 22. continue,
The cylinder rod of the fluid pressure cylinder 48 retreats, and the push plate 11a returns to its original position. Further, the pushing plate 11a of the filter medium discharging device 11 described above also functions as a stopper for preventing the filter medium 1b from being lifted upward during the pushing operation of the filter medium 1b.

Subsequently, the cylinder rod 5a of the extrusion unit 5 moves forward to push back the wooden frame 1a from which the filter medium 1b has been extruded to a predetermined position on the transport unit 3, and then the cylinder rod 5a retreats to return to its original position. do.

Subsequently, the transport unit 3 is operated and the wooden frame 1a is
At the same time, untreated frame filters 1 are sequentially conveyed to the front of the pushing unit 4.

Thereafter, the above-described operations are performed again in sequence, and the filter medium 1b of the frame-type filter 1 is separated from the wooden frame 1a in the same manner.

In addition, as described above, the separated wooden frame 1a
is transported to the next processing facility by the transport unit 3, disassembled into four flat plates, crushed by a crusher or the like, and incinerated. On the other hand, the separated filter medium 1b is transported to the next processing facility by the chute 22, and after being compressed and reduced in volume, it is either stored or melted in a melting furnace.

In addition, in the above-mentioned example, when the dimensions of the thin blade 9 are 5 mm in thickness x 160 mm in blade width, according to the data when processing the frame type filter 1 with external dimensions of mouth 200 x height 80 mm, it weighs 800 kg. Wooden frame 1 with pushing force of
It has been confirmed that a and the filter medium 1b can be separated without scattering.

FIGS. 9 and 10 show another embodiment of the present invention, and parts common to the above-mentioned embodiment are given common numbers to simplify the explanation.

This other embodiment differs from the previous embodiment in that a pair of blade holding members 49 holding thin blades 9 are replaced by a cross slide member 49a supported by a saddle 41b fixed to a ram 40, and a cross slide member 49a supported by a saddle 41b fixed to a ram 40. It consists of a blade holder 49b supported by a slide member 49a and to which a thin blade 9 is attached, and a slideway (dovetail) 41a and a dovetail groove 49c each having a saddle 41b and a cross slide member 49a formed therein. Yotsute thin blade 9
The thin blade 9 is movable in the blade width direction by a slideway (dovetail) 49d and a dovetail groove 49e in which a cross slide member 49a and a blade holding stand 49b are respectively formed. connected, and further the cross slide member 49a
A threaded portion is formed on the handle shaft 50a of the handle 50 rotatably supported by the handle 50, and this threaded portion is formed on the blade holder 49b and screwed into the internal threaded portion 49f. , the thin blade 9 is movable in the blade width direction, and the frame type filter 1
This makes it easier to deal with changes in the specifications, especially the rectangular external dimensions or the wooden frame thickness dimensions.

In the above embodiment, the stopper 23 of the ratchet mechanism 8d that rotates the Geneva gear 8c in one direction by a predetermined angle is a fluid cylinder.
Instead, the tip portion 23a, which is supported so as to be expandable and retractable by a spring force or the like, is inserted into the radial groove 34 of the Geneva gear 8c, and the ratchet wheel 25
When the rotational force transmitted to the Geneva gear 8c via the rotational force reaches a certain level, the tip portion 23a may be retracted to allow the Geneva gear 8c to rotate.
Further, instead of the ratchet mechanism 8d, a gear mechanism from a known rotary drive source may be used as the rotation transmission mechanism to the circular table 8b.

Further, in the above embodiments, an example of a square cylindrical frame filter is shown as the frame filter 1, but the frame filter is not limited to this, and may be a polygonal cylindrical shape. In that case, the mounting positional relationship of the thin blades 9, 9 may be appropriately determined according to the shape.

Further, in the above-described embodiment, the processing device in which the thin blade 9 moves in the vertical direction (vertical direction);
Although a so-called vertical processing device is shown, the moving direction of the thin blade 9 is not limited to the vertical direction, and for example, a so-called horizontal processing device in which the thin blade moves in the horizontal direction is also conceivable. In addition, in the case of a horizontal processing device like this, the frame-type filter is fixed to a filter support with the opening side facing horizontally, and the filter support rotates in a vertical plane. become.

As explained above, the processing device of the present invention
A filter support base for fixing a frame-type filter without covering its opening, a rotation indexing device for rotating the filter support base by a fixed angle around the cylindrical center of the frame-type filter, and a frame supported by the filter support base. The device is equipped with a filter media cutting device that inserts a thin blade provided on one side of the frame filter in the opening direction into the frame filter and presses the filter media of the frame filter at the boundary with the wood to separate the filter media and the wooden frame. , Each time the frame-type filter is rotated by a certain angle using the filter support base and the frame-type filter is shifted, a thin blade is inserted into the frame-type filter, and the border between the filter medium and the wooden frame of the frame-type filter is completely circumferentially removed. Since the filter medium is separated from the wooden frame by pushing it across, the wood and filter medium pieces are not scattered during the filter medium separation work, and no part of the filter medium is left behind in the wooden frame. and the filter medium can be separated. Therefore, it is possible to prevent contamination of the work environment due to the filter media separation work, thereby increasing safety and facilitating subsequent processing work.

[Brief explanation of the drawing]

Figures 1 and 2 show high-performance filters that are subject to the processing of the present invention, respectively; Figure 1 is a front view, Figure 2 is a sectional view taken along the - line in Figure 1, and Figure 3 is a cross-sectional view taken along the - line in Figure 1. ~ Figures 7 show one embodiment of the present invention, Figure 3 is a front view, and Figure 4 is a view of - of Figure 3.
5 is a sectional view taken along the - line in Fig. 4, Fig. 6 is a sectional view taken along the - line in Fig. 5, and Fig. 7 is a sectional view taken along the - line in Fig. 5. , Fig. 8 A, B, C, D, and H are explanatory diagrams of the operation of the present invention, and Fig. 9 and Fig. 10 show other embodiments of the present invention, and Fig. 9 is an enlarged view of the main part. Figure, 1st
FIG. 0 is a sectional view taken along the line X--X in FIG. 9. 1...High performance filter (frame type filter), 1a
... Wooden frame, 1b ... Filter medium, 2 ... Filter medium separation unit, 7 ... Filter support stand, 8 ... Rotary indexing device, 9 ... Thin blade, 10 ... Filter medium cutting device, 11
... Filter medium discharge device, 11a ... Push plate, 12 ...
Stepped portion, 13, 14...opening, 15...insertion port,
16...Extrusion port, 17...Clamper.

Claims (1)

[Claims] 1. A filter support for fixing a frame-type filter in which a filter medium is loaded in a cylindrical wooden frame without covering its opening, and a filter support for rotating the frame-type filter by a constant angle around the cylindrical center of the frame-type filter. A thin blade provided on one side in the opening direction of the frame-type filter supported by the filter support base is inserted into the frame-type filter to insert the filter medium of the frame-type filter at the boundary with the wooden frame. A filter media cutting device that separates the filter media from the wooden frame, and a push plate provided in the opening direction of the frame filter supported by the filter support base are inserted into the frame filter, and the filter media cutting device cuts the wood. 1. A used filter processing device comprising: a filter material discharge device for pushing out the filter material separated from the frame from the wooden frame.