KR101919275B1 - Radioactive Waste Drum Cutting Device - Google Patents

Abstract

According to the present invention, provided is a radioactive waste drum cutting device, quietly and accurately cutting a waste drum without occurrence of flames, smoke, and dust, increasing the probability of recycling a waste drum with relatively low contamination after decontamination with the accurate cutting so as to reduce waste storage of the waste drum, designed to be suitable for the cutting work of the waste drum so as to increase workability with the convenient and easy cutting work, and minimizing the device so as to facilitate manufacturing and reduce manufacturing costs. The radioactive waste drum cutting device comprises: a lower frame; a lower rotating shaft having a lower cutter for cutting the waste drum; an upper rotating shaft having an upper cutter; a cutter lifting device allowing the upper cutter to come in close contact with the lower cutter so as to enable the upper cutter to move between a cut position where a portion of cutter blades are overlapped with each other and a cut-off position where the upper cutter is spaced from the lower cutter; a guide roller supporting the outer circumferential surface of the waste drum mounted between the lower rotating shaft and the upper rotating shaft from the bottom; and a rotation driving device for rotating the lower rotating shaft and the guide roller.

Description

Technical Field [0001] The present invention relates to a radioactive waste drum cutting device,

The present invention relates to a radioactive waste drum cutting apparatus, and more particularly, to a radioactive waste drum cutting apparatus for cutting a radioactive waste drum to be discarded in accordance with the radioactive waste disposal regulations, ≪ / RTI >

Generally, when operating a nuclear power plant, it is necessary to replace the drums due to corrosion or damage during the repacking process of the disposal drum, to replace the drums due to the damage of the waste oil drum, corrosion or breakage in the waste oil refining operation, Replacement drums have been generated. These closed drums are stored in sealed containers in accordance with the regulations on radioactive waste disposal, stored in a designated place or recycled after decontamination.

It is necessary to reduce the volume in the disposal process of the closed drum. For this purpose, the closed drum is compressed or cut. However, there is a concern that there is a risk of safety accidents, risk of fire, and spread of pollution at the time of work, There is a need for a safe processing method for processing.

As a conventional waste disposal method, there is a waste drum compression and cutting apparatus disclosed in, for example, Korean Patent Laid-Open No. 10-2010-0067196. This is a method of compressing and cutting the closed drum to reduce the volume. In general, radioactive metal wastes have relatively low levels of pollution and relatively clean metal wastes are decontaminated and recycled. However, metal wastes treated by the compression method are difficult to decontaminate and can not be recycled.

In addition, there is a method to reduce the volume by cutting the closed drum with oxygen welding machine, plasma cutting machine, grinder and electric saw. However, there is a risk of safety accident by generating accident flame, smoke and dust. In case of oxygen welding machine and plasma cutting machine, Is very high and generates secondary wastes. Since the cutting site is not cleaned, it is difficult to secure reliability in self-disposal after decontamination and recycling. In case of grinder and electric saw, secondary waste is generated, there is a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method of cutting a closed drum without a flame, smoke and dust, And to reduce the number of waste drums to be discarded and stored by increasing the probability of recycling after decontamination.

In addition, the present invention is designed to be suitable for the cutting operation of the closed drum, so that the cutting operation is very convenient and simple, the workability can be improved, and the radioactive abrasive drum cutting Device.

According to an aspect of the present invention, A lower rotating shaft disposed horizontally in the lower frame and having both ends rotatably installed and a lower cutter for cutting a closed drum; An upper rotary shaft disposed in an upper portion of the lower rotary shaft in a horizontal direction and having an upper cutter positioned above the lower cutter; A cutting position which rotatably supports the upper rotation shaft and is vertically movable up and down on one side of the lower frame to bring the upper cutter closer to the lower cutter so that a part of the cutter blades are overlapped with each other, A cutter lift mechanism for moving the cutter lift mechanism between the cut release positions; A guide roller disposed horizontally on the lower frame and rotatably installed at both ends thereof to support an outer peripheral surface of a closed drum mounted between the lower rotary shaft and the upper rotary shaft at a lower portion thereof; And a rotary drive mechanism installed on the lower frame for rotating the lower rotary shaft and the guide roller.

In the present invention, the lower cutter and the upper cutter are characterized by the first and second lower cutters and the first and second upper cutters arranged at predetermined intervals on the respective lower rotation axis and the upper rotation axis, respectively .

According to the present invention, the cutter elevator includes a vertical frame provided at one side of the lower frame, a vertical block installed vertically to the vertical frame and rotatably supporting the upper rotary shaft, And a drive cylinder for moving the ascending / descending block up and down.

Further, in the present invention, the cutter elevating mechanism may further include a horizontal support rod fixed to the elevating block and disposed above the upper rotation shaft, and a plurality of shaft support rollers installed on the horizontal support shaft for rotatably supporting the upper rotation shaft in the downward direction It is characterized by a radioactive waste drum cutting device.

Further, in the present invention, the guide roller is characterized by a plurality of groove portions formed of a rubber material having frictional force and capable of receiving projections of a closed drum supported by guide rollers.

In the present invention, it is preferable that the guide roller comprises a first guide roller and a second guide roller provided on both sides of the closed drum, and the rotation drive mechanism rotates the first guide roller, The second guide rollers which are not in contact with the first guide rollers are linearly movable by a linear movement mechanism provided on the lower frame in a direction close to or away from the first guide rollers.

According to the present invention, a closed drum is mounted between a lower cutter and an upper cutter, and the upper cutter is lowered to a cutting position. Then, the lower cutter and the closed drum are simultaneously rotated, It is possible to cut the drum in the circumferential direction. Such a cutting method is very convenient and simple, so that not only the stability and workability are improved, but also the structure suitable for cutting the closed drum is made, .

In addition, the apparatus for cutting a radioactive waste drum of the present invention has two pairs of a lower cutter and an upper cutter so that cutting is performed for two portions in a single drive, so that the work can be performed quickly. Since the position of the guide roller supported by the lower portion is adjusted by the linear moving mechanism, the diameter of the closed drum can be changed.

In addition, since the present invention does not generate flame, smoke and dust during cutting of a closed drum, and is cleanly cut with low noise, relatively clean closed drum can increase the throughput that can be recycled after decontamination, , It is possible to reduce the throughput of the storage space, to eliminate the concern of the occurrence of additional work and safety accident exposure, and to reduce the risk of safety accidents, risk of fire, Invention.

1 is a side view of a spinning apparatus for cutting a radioactive waste according to the present invention;
2 is a sectional view taken along the line AA in Fig.
3 is a sectional view taken along line BB of Fig.
4 is a sectional view showing a linear movement mechanism for moving a guide roller in the present invention.
FIGS. 5A and 5B are operational views of the apparatus for cutting a radioactive waste drum according to the present invention. FIG.
FIG. 6 is a perspective view of a closed drum cut by a radioactive-coated drum cutting apparatus according to the present invention in a natan. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the apparatus for cutting a radioactive waste drum according to the present invention includes a lower frame 10 having a structure in which both side plates 11 and 12, which are maintained at a constant interval, are fixed by a plurality of connection bars 13 Respectively.

In the lower frame 10, a lower rotary shaft 21 is arranged in a horizontal direction, both ends are rotatably installed on both side plates 11 and 12, a lower cutter is fixed to a lower rotary shaft 21, Or may be constituted by two first and second lower cutters 21a and 21b arranged at a predetermined distance in the longitudinal direction of the lower rotary shaft 21 as in the present embodiment.

The upper rotary shaft 22 is arranged horizontally in parallel with the lower rotary shaft 21 and the upper cutter is fixed to the upper rotary shaft 22 in correspondence with the lower cutters 21a and 21b. And two first and second upper cutters 22a and 22b arranged at a predetermined distance in the longitudinal direction of the first and second upper cutters 22 and 22. The first and second lower cutters 21a and 21b, (22a, 22b) are located close to the upper and lower portions, respectively.

The upper rotary shaft 22 is rotatably supported by the cutter elevating mechanism 30 provided at one side of the lower frame 10 and is movable in the vertical direction. The cutter elevating mechanism 30 is provided with a part of the mutual cutter blade so that the first and second upper cutters 22a and 22b can be brought close to the first and second lower cutters 21a and 21b, And between the first and second upper cutters 22a and 22b between the first and second lower cutters 21a and 21b.

The cutter elevating mechanism 30 is constituted by a vertical frame (not shown) constituted by front and rear plates 31a and 31b and upper and lower plates 31c and 31d which are installed on one side plate 11 of the lower frame 10 and arranged in a vertically long direction The vertical frame 31 is provided with a vertically moving block 33 which is guided by a plurality of vertical guide bars 32 so that one end of the upper rotating shaft 22 is connected to the vertically moving block 33 And is rotatably supported.

The lifting block 33 is lifted and lowered by a driving cylinder 34 and an elastic member 35 provided on the vertical frame 31. The driving cylinder 34 is driven by a pneumatic cylinder An actuating hydraulic cylinder can be used and is provided between the lift block 33 and the upper plate of the vertical frame 31 to push down the lift block 33 to move the upper cutters 22a and 22b to the cutting position .

The elastic member 35 can be constituted by a compression coil spring and is mounted on a vertical guide bar between the elevating block 33 and the lower plate of the vertical frame 31. The elastic member 35 can be moved up and down The movement of the lifting block 33 is resiliently supported.

The cutter elevating mechanism 30 has a horizontal support 36 fixed to the elevating block 33 and disposed above the upper rotary shaft 22. The cutter elevator 30 has an upper rotation shaft 22 at the end of the horizontal support 36, There is provided a plurality of shaft supporting rollers 37 which are rotatably supported in contact with downward. That is, the plurality of shaft support rollers 37 are located on the opposite side of the lower rotary shaft 21, and when the end of the upper rotary shaft 22 is in the upward direction away from the lower rotary shaft 21 when the closed drum D is cut And supports it in a top-down direction.

1, 3 and 4, the present invention is provided with guide rollers 41 and 42 disposed on both side plates 11 and 12 of a lower frame 10 so as to be rotatable at both ends thereof, do.

The guide rollers 41 and 42 are for supporting and supporting the outer circumferential surface of the closed drum D mounted between the lower rotary shaft 21 and the upper rotary shaft 22 from below, And a first guide roller 41 and a second guide roller 42 provided on both sides thereof.

Since the first and second guide rollers 41 and 42 are brought into contact with the outer circumferential surface of the closed drum D and rotate by the frictional driving force, the first and second guide rollers 41 and 42 are preferably made of a rubber material having relatively high frictional force, 41 and 42 form a plurality of grooves 41a and 42a into which the protruding portion D1 of the closed drum D can be inserted. The plurality of grooves 41a and 42a prevent the gap between the guide rollers 41 and 42 and the peripheral surface of the closed drum drum D from being formed by the protruding portion D1 of the closed drum D, It does not deteriorate.

1, the lower rotary shaft 21 and the guide rollers 41 and 42 are rotated by a rotary drive mechanism 50 provided on the lower frame 10, and the guide rollers 41 and 42 are rotated In this embodiment, the first guide roller 41 is rotated.

The rotary drive mechanism 50 includes a deceleration motor 51 fixed to the lower frame 10 and a worm and worm gear 52 for transmitting the rotational force of the deceleration motor 51 to the lower rotation shaft 21 and the first guide roller 41. [ (52,53).

The second guide roller 42 which is not rotationally driven among the guide rollers 41 and 42 is linearly moved to a position close to or spaced from the first guide roller 41 by the linear movement mechanism 60 provided on the lower frame 10, And is movable.

3 and 4, the linear movement mechanism 60 includes a roller bracket 61 for rotatably supporting the second guide roller 42, and the roller bracket 61 is fixed to the lower frame 10 And the second guide roller 42 is guided in a direction to bring the second guide roller 42 closer to or away from the first guide roller 41. The lower frame 10 is provided with a handle 63, And a screw shaft 64 screwed to the roller bracket 61 is fixed to the handle 63 so that the roller bracket 61 and the second guide roller 42 are fixed to the straight bar 62 As shown in Fig.

The operation of the radioactive waste-drilling apparatus having such a structure will be described as follows.

The lower cutters 21a and 21b are opened by using the open portion of the closed drum D in a state where the upper cutters 22a and 22b are at the cut release positions spaced apart from the lower cutters 21a and 21b as shown in FIG. The upper cutters 22a and 22b are located inside the closed drum D when the closed drum D is mounted between the lower rotary shaft 21 and the upper rotary shaft 22 through the upper cutters 22a and 22b, The lower cutters 21a and 21b are positioned on the outer side of the drum D and the outer peripheral surface of the closed drum D is supported by the first and second guide rollers 41 and 42 on both sides .

3 and 4, the second guide roller 42 is movable toward the first guide roller 41 by the linear movement mechanism 60, and the handle 63 of the linear movement mechanism 60 The roller bracket 61 screwed to the screw shaft 64 is guided by the linear bar 62 and linearly moved so that the diameter of the second guide roller 62 is increased in accordance with the size of the large diameter and the small diameter of the closed drum D, (42) can be appropriately moved and rotated. Thereby, it is possible to have a compatibility to cut various kinds of closed drums (D) having different diameters.

The cutting edge a of the opening of the closed drum D is positioned at a position between the first lower cutter 21a and the first upper cutter 22a and the driving cylinder 34 of the cutter elevator 30 is moved The upper cutters 22a and 22b are moved closer to the lower cutters 21a and 21b to a cutting position where a part of the cutter blades overlap with each other, D are cut by the overlapping cutter blades of the lower cutters 21a, 21b and the upper cutters 22a, 22b.

When the decelerating motor 51 of the rotation driving mechanism 50 is driven in this state, the rotational driving force of the decelerating motor 51 is transmitted to the lower rotating shaft 21 through the worm and worm wheel 52, The closed roller drum D is rotated by the rolling friction by the rotation of the first guide roller 41 and the lower cutters 21a and 21b are rotated by the rotation of the lower rotary shaft 21, And the upper cutters 22a and 22b rotate in conjunction with the lower cutters 21a and 22b.

The closed drums D are gradually cut along the circumferential direction while the lower cutters 21a and 21b, the upper cutters 22a and 22b and the closed drum D are simultaneously rotated, and the lower cutters 21a and 21b The upper cutters 22a and 22b are provided at two positions so that the closed drums D can be simultaneously cut at two places. By the first lower cutters 21a and 21b and the first upper cutters 22a and 22b, The cutting edge a of the open end of the closed drum D can be cut and separated and the second lower cutters 21a and 21b and the second upper cutters 22a and 22b can cut off the cutting edge a of the closed drum D, The intermediate point (b) can be cut and separated into 1/2.

The upper cutters 22a and 22b are moved away from the lower cutters 21a and 21b to the cut release position by acting on the drive cylinder 34 of the cutter lift mechanism 30 to raise the lift block 33. [ After the pieces of the closed drum D having been subjected to the first cutting operation are removed, as shown in FIG. 5B, the bottom side closed drum D cut in half is cut into the lower The first and second lower cutters 21a and 21b and the second upper cutters 22a and 22b are mounted between the lower rotary shaft 21 and the upper rotary shaft 22 through the cutters 21a and 21b and the upper cutters 22a and 22b, The cutting edge c of the bottom edge of the closed drum D is cut by repeating the cutting process described above so that the cutting edge c of the bottom edge of the closed drum D is positioned between the edges As shown in Fig. 6, the closed drum D can be cut into the rim of the opening part, the rim of the bottom part, and the two bodies.

In addition, the two bodies can be easily cut with a cutting tool, Nibbler, to further reduce the volume, and the cutting residue generated by cutting with a nibbler can be used as a representative sample during self-disposal. Can be omitted.

As described above, according to the present invention, since the closed cutters 21a and 21b and the upper cutters 22a and 22b are cut while rotating the closed drum D, the cutting operation of the closed drum D is very convenient and simple, Is clean, and it is possible to improve workability and safety with no occurrence of flame, smoke and dust, and low noise.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the present invention and not to be construed as limiting the scope of the present invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: lower frame 21: lower rotating shaft
21a, 21b: Lower cutter 22: Upper rotary shaft
22a, 22b: upper cutter 30: cutter lift mechanism
31: vertical frame 32: vertical guide bar
33: ascending / descending block 34: driving cylinder
36: horizontal support 37: shaft support roller
41, 42: Guide roller 50: Rotary driving mechanism
51: Deceleration Motor 52,53: Warm and Warming Day
60: Ship movement mechanism D: Drum

Claims (6)

A lower frame;
A lower rotating shaft disposed horizontally in the lower frame and having both ends rotatably installed and a lower cutter for cutting a closed drum;
An upper rotary shaft disposed in an upper portion of the lower rotary shaft in a horizontal direction and having an upper cutter positioned above the lower cutter;
A cutting position which rotatably supports the upper rotation shaft and is vertically movable up and down on one side of the lower frame to bring the upper cutter closer to the lower cutter so that a part of the cutter blades are overlapped with each other, A cutter lift mechanism for moving the cutter lift mechanism between the cut release positions;
A guide roller disposed horizontally on the lower frame and rotatably installed at both ends thereof to support an outer peripheral surface of a closed drum mounted between the lower rotary shaft and the upper rotary shaft at a lower portion thereof; And
And a rotation drive mechanism installed on the lower frame for rotating the lower rotation shaft and the guide roller,
Wherein the guide rollers are formed of a rubber material having a frictional force and formed with a plurality of grooves capable of receiving projections of a closed drum supported by guide rollers,
The guide roller includes a first guide roller and a second guide roller disposed on both sides of the closed drum. The second guide roller rotatably drives the first guide roller and the second guide roller does not rotate, And a linear movement mechanism provided in the lower frame allows linear movement in a direction close to or away from the first guide rollers. The apparatus according to claim 1, wherein the lower cutter and the upper cutter are composed of first and second lower cutters and first and second upper cutters arranged at predetermined intervals on respective lower rotation shafts and upper rotation shafts, Cutting device. The cutter elevator according to claim 1 or 2, wherein the cutter elevator includes a vertical frame provided at one side of the lower frame, a lift block installed to be vertically movable up and down the vertical frame, And a drive cylinder installed in the vertical frame for moving the lift block up and down. [5] The apparatus of claim 3, wherein the cutter elevating mechanism comprises: a horizontal support which is fixed to the elevating block and is disposed above the upper rotation shaft; and a plurality of shaft supporting rollers installed on the horizontal support to rotate the upper rotation shaft in a downward direction Wherein the cutting device is a drum. delete delete

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