KR20120126550A - Pipe cutting device for frame of spent nuclear fuel assembly - Google Patents

Abstract

PURPOSE: A pipe cutting device for a frame of a spent nuclear fuel assembly is provided to minimize radiation exposure by stably performing a task under water. CONSTITUTION: A pipe cutting device for a frame of a spent nuclear fuel assembly comprises a pipe clamping unit(200), a pipe cut-out unit(300), and a transport unit(400). The pipe clamping unit supports both ends of a pipe installed to the frame of the spent nuclear fuel assembly. The pipe cut-out unit cuts both ends of the pipe while supporting the both ends of the pipe using the pipe clamping unit. The transport unit transfers the pipe cut-out unit to a cut position. The pipe clamping unit, the pipe cut-out unit, and the transport unit form an underwater driving unit which is installed in a sealed state in order to be operated under water.

Description

PIPE CUTTING DEVICE FOR FRAME OF SPENT NUCLEAR FUEL ASSEMBLY}

The present invention relates to an apparatus for cutting a tube such as a guide tube or a measuring tube in a spent fuel skeleton composed of a support grid, a guide tube, a measuring tube, and the like, and more particularly, provided in the spent fuel skeleton The present invention relates to a tube cutting device for spent nuclear fuel skeleton that can stably cut a guide tube or a measuring tube in a tank.

The fuel assemblies and their components used in the reactor are shown in FIGS. 1 and 2. 1 is a front schematic view of a general fuel assembly, and FIG. 2 is a plan view of the main configuration of the fuel skeleton.

Referring to FIG. 1, the nuclear fuel assembly 20 includes, for example, an upper fixture 4, a lower fixture 5, a support grid 2, a guide tube 3, and a measurement tube 6. A nuclear fuel skeleton (supporting lattice) 10 constituting the skeleton of the nuclear fuel assembly 20, and a fuel rod 21 is inserted into the support lattice (2) and installed in the support lattice (2).

Referring to FIG. 2, the support grid 2 is formed in a grid so as to partition a space in which a plurality of fuel rods (21 in FIG. 1) may be charged. In addition, the guide tube 3 provides a path through which a control rod (not shown) having neutron absorbing capacity is inserted in the reactor, and the measurement tube 6 provides a path through which a measurement rod (not shown) is inserted.

At this time, the guide tube (3) and the measuring tube (6) is formed in the form of a long tube and inserted into the grid (grid) inside the support grid (2) and then fixed by the support grid (2) and welding, etc. nuclear fuel skeleton While forming a portion of the sieve 10 is constrained the movement of the nuclear fuel skeleton (10).

On the other hand, the spent fuel skeleton (10) is the support grid (2) itself to form the fuel skeleton (10) by neutron irradiation, and the support grid (2) and the guide tube (3) / measuring tube (6) The welds and joints are very fragile.

Therefore, there is a need to confirm the stability of the spent fuel skeleton 10 through various mechanical tests on the weak parts of the spent fuel skeleton 10.

For the mechanical test, it is necessary to cut a portion of the support lattice 2, which is the weakest portion of the spent fuel skeleton 10 in which the fuel rod 21 is separated, to a certain size. The tube (3) and instrumentation tube (6) must be cut.

However, since the spent fuel skeleton 10 is very fragile by neutron irradiation, the welding lattice of the support lattice 2 or the support lattice 2 and the guide tube 3 / measuring tube 6 is small. There is a problem that it is difficult to precisely mechanically test the vulnerable parts due to the high possibility of breakage or damage.

Moreover, when cutting or dismantling the spent fuel skeleton 10 outside the tank, there is a fear of exposure to the operator.

The present invention has been made to solve at least some of the problems of the prior art, the support grid itself or the support grid when separating the support grid portion within a certain size by cutting the guide tube or measurement tube in the spent fuel skeleton It is an object of the present invention to provide a cutting device for spent fuel skeletons, which can minimize damage or damage to the joints of the guide tube and the measuring tube, thereby enabling stable and accurate mechanical testing of the spent fuel skeletons.

In addition, an object of the present invention is to provide a cutting device for spent nuclear fuel skeleton that can be stable in water to minimize the possibility of exposure to radiation.

In addition, an object of the present invention is to provide a cutting device for spent nuclear fuel skeleton that can be cut in the depth of the water as well as work can be cut while checking the working conditions.

In addition, an object of the present invention is to provide a cutting device for spent nuclear fuel skeleton to ensure the sealing property for the main drive member to enable the operation in the water as one aspect.

As one aspect for achieving the above object, the present invention provides a tube clamping portion for supporting both ends of the tube provided in the spent fuel skeleton; A pipe cutting part for cutting between the supported both ends of the pipe while the pipe clamping part supports both ends of the pipe; It provides a pipe cutting device for spent nuclear fuel skeleton comprising a; and a transfer unit for transferring the pipe cutting to the cutting position.

Preferably, the tube clamping portion, the tube cut portion and the transfer portion may form an underwater driving unit which is installed in a sealed state to be operable in the water.

Also preferably, the tube clamping portion is a pair of clamping members for supporting the tube on both sides of the cutting member provided in the tube cutting portion, and a clamping driving member for driving the pair of clamping members to approach or away from the tube It may be provided.

In this case, the pair of clamping members may include first and second clamping members each approaching from both sides of the tube by the driving of the clamping driving member to perform the clamping operation of the tube. In addition, the first and second clamping members may include a seating groove having an arc shape corresponding to the outer diameter of the tube so as to contact the tube.

Preferably, the tube clamping portion may further include a support member for supporting the pair of clamping members in a movable state. At this time, at least one of the clamping driving member and the support member may be operated by pneumatic pressure.

On the other hand, the tube cutting unit, a cutting member for cutting the tube, a rotary driving unit for providing a driving force required for the rotation of the cutting member, a rotational force transmission unit for transmitting the rotational force of the rotary driving unit to the cutting member, and the rotational force transmission It may be provided with a cutout housing to be installed. At this time, the cutting member is made of a diamond wheel, the rotation speed of the diamond wheel can be driven at 1200rpm or less.

Preferably, the rotational force transmission member, a first rotational force transmission member including a first shaft which rotates in accordance with the rotation of the rotary drive unit and extends in the vertical direction, and a first gear provided on the lower end of the first shaft; And a second rotation force transmitting member including a second shaft having the cutting member fixed at one end and a second gear provided at the other end of the second shaft and engaged with the first gear to rotate.

In this case, the first shaft may be formed longer than the second shaft and extend downward, and the first gear and the second gear may have right angles of rotation.

Also preferably, the cutout housing has a structure in which both side surfaces of the lower part are opened, a head housing is installed at one open side, and a cover is installed at the other open side, and the head housing is exposed at the other end of the second shaft. It can be configured to be rotatably installed in the state. In this case, a sealing member may be installed between the head housing and the cutout housing.

Preferably, the transfer unit may include a vertical drive unit for providing a driving force required for the vertical movement of the pipe cutting unit, and a power transmission unit for transmitting the driving force of the vertical drive unit.

In this case, the power transmission unit may be connected to the cutout housing to move the cutout housing up and down by a predetermined amount.

More preferably, the power transmission unit includes a first power transmission unit that rotates by rotational driving of the vertical drive unit, and a second power transmission unit that moves up and down according to the rotation of the first power transmission unit, and the second power source. The transfer member may be coupled to the cutout housing.

Meanwhile, the pipe cutting device for spent nuclear fuel skeleton according to an aspect of the present invention may further include an image unit for observing a cutting state of the pipe.

In this case, the image part is an extension part which is installed in a state protruded in the cutting unit housing provided in the cutting unit or the transfer unit housing provided in the conveying unit, a rotating unit which is rotatably connected to the extension unit, and is fixed to the rotating unit It may be provided with a camera support for supporting the camera.

In another aspect, the present invention provides a tube clamping portion for supporting a tube provided in a spent fuel skeleton, a tube cutting portion for cutting a tube in a state in which the tube clamping portion supports the tube, and the tube cutting portion in a cutting position. An underwater driving part provided with a conveying part for conveying and being sealed to be operable in water; A connection part connected to an upper side of the underwater driving part; It is connected to the upper side of the connecting portion is provided on the upper surface, the operation unit configured to move the underwater driving unit to a workable position; provides a spent fuel skeleton pipe cutting device comprising a.

Preferably, the connecting portion may be formed by connecting a plurality of connecting pipes.

Also preferably, the operation unit may include a hook that is connected to the crane so as to be supported by the crane in a state where the underwater drive unit and the connection unit are located in the water, and a handle used to adjust the position of the underwater drive unit to perform the cutting of the pipe. Can be.

According to one embodiment of the present invention having such a configuration, the support grid when cutting the tube because it is cut between the supported both ends of the tube while supporting both ends of the guide tube or measuring tube provided in the spent fuel skeleton with the tube clamping portion The impact on the connection between the supporting grid and the guide tube / measurement tube can be minimized to prevent breakage or damage, and thus the stable and accurate mechanical testing of the spent fuel skeleton can be achieved. You can get it. In addition, by minimizing the cutting speed of the cutting member in a state in which the tube is supported by the tube clamping portion, it is possible to minimize the impact on the support grid. In particular, by using the diamond wheel as the cutting member and by reducing the rotation speed of the diamond wheel it is possible to further minimize the impact (damage) of the support grid and the like caused by the support grid and the like.

In addition, according to an embodiment of the present invention, the first and second clamping members approach from both sides of the tube to clamp (grip and support) the tube, and use the pneumatic force to drive the clamping driving member or the support member. The impact generated when clamping can also be minimized.

In addition, according to one embodiment of the present invention, except for the essential configuration, such as a support member or a cutting member that is to be driven in the water to seal the water so as not to enter the housing to cut the spent fuel skeleton in the water The effect can be achieved.

In addition, according to one embodiment of the present invention, the conveying unit may raise and lower the tube cutting unit as a whole to obtain an effect of precisely cutting the cutting member by adjusting the lifting amount of the tube cutting unit. Therefore, by cutting the tube from the initial position of the cutting member to a point slightly exceeding the length corresponding to the diameter of the tube, the cutting of the tube can be accurately performed and the cutting member can be prevented from contacting the unclamped tube. do.

In addition, according to an embodiment of the present invention by changing the driving direction of the rotational drive portion and the cutting member in a perpendicular direction by the rotational force transmission unit it is possible to minimize the space between the pair of clamping members required for driving the cutting member, As a result, the distance of the pipe portion supported by the pair of clamping members is shortened, thereby obtaining an effect of minimizing the impact on the support grid during cutting.

In addition, according to an embodiment of the present invention, since the cutting operation is possible while checking the working status through the camera, there is an effect that smooth operation is possible in the water.

In addition, according to one embodiment of the present invention, it is possible to obtain the effect that the cutting of pipes of various diameters can be performed by replacing the clamping member.

1 is a front schematic view of a typical fuel assembly.
Figure 2 is a plan view of the main configuration of the fuel skeleton.
Figure 3 is a front view showing the main configuration of the tube cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention.
Figure 4 is an enlarged side view of the underwater drive of the tube cutting device for spent nuclear fuel skeleton shown in FIG.
5 is a front view showing the main configuration of the tube clamping portion and the image portion shown in FIG.
FIG. 6 is a side cross-sectional view of the tube cutout shown in FIG. 3. FIG.
FIG. 7 is a front view of the pipe cutout shown in FIG. 6. FIG.
8 is a side view showing the tube clamping portion and the conveying portion shown in FIG.
Figure 9 is a perspective view showing the operating state of the tube cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.

In this specification, the terms "comprise", "comprise", "have" and the like are intended to designate that there is a component described in the specification or a combination thereof, and one or more other features. It is to be understood that the present invention does not exclude the possibility of addition or possibility of adding elements, components, or a combination thereof.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification. In addition, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to those shown in the drawings.

With reference to Figures 3 to 9 looks at with respect to the tube cutting device for spent nuclear fuel skeleton according to an embodiment of the present invention.

3 and 9, the tube cutting device 100 for spent nuclear fuel skeleton according to an embodiment of the present invention is a guide tube long located between the support grid (2) of the spent nuclear fuel skeleton ( 3) and the control tube (6) by cutting a certain portion to test the machine with the guide tube (3) and control tube (6) of short length attached to the support grid (2). In particular, the tube cutting device 100 for spent nuclear fuel skeleton according to an embodiment of the present invention can be cut in a tank such as a test facility (PIEF) storage pool after irradiating the spent nuclear fuel skeleton (10). Therefore, the damage caused by radiation exposure can be prevented.

As shown in Figure 3, the spent nuclear fuel skeleton pipe cutting device 100 according to an embodiment of the present invention is a pipe (P) {hereinafter, a guide tube provided in the spent fuel skeleton 10 in water (3) or the control unit (6), the tube provided in the nuclear fuel skeleton, collectively referred to as a 'tube'} and the driving portion 110, the connecting portion 120 connected to the upper side of the underwater driving unit 110 And, it is connected to the upper side of the connecting portion 120 is provided on the upper surface, it may be configured to include an operation unit 130 configured to move the underwater driving unit 110 to a workable position.

First, the underwater driving unit 110 will be described with reference to FIGS. 3 to 9.

The underwater driving unit 110 is a tube clamping unit 200 for supporting the pipe (P) provided in the spent fuel skeleton (10), and the tube clamping unit 200 is a state in which the pipe (P) supported In the pipe cut section 300 for cutting the pipe (P) and the transfer section 400 for transferring the pipe cut portion 300 to the cutting position, and is made to be sealed to operate in water.

The tube clamping unit 200, as shown in Figures 3 to 5, 8 and 9, to support both ends of the tube (P) provided in the spent fuel skeleton (10), tube cutting portion A pair of clamping members 210 for supporting the pipe P on both sides of the cutting member 310 provided in the 300 and the pair of clamping members 210 approach the pipe P or the pipe ( And a clamping driving member 230 for driving away from P) and a supporting member 220 for supporting the pair of clamping members 210 in a movable state.

The pair of clamping members 210 are members for supporting the pipes P at both left and right sides of the cutting point when the pipes P are cut. Each of the clamping members 210 may be driven by the clamping driving member 230 to approach the both sides of the pipe P, that is, the radial direction of the cutting member 310 to perform the clamping operation of the pipe P. And second clamping members 210a and 210b.

Each of the first and second clamping members 210a and 210b includes a seating groove 211 having an arc shape corresponding to the outer diameter of the pipe P so as to clamp (grip) the pipe P, respectively. The pipe P comes into contact with the pair of seating grooves 211 on both sides. At this time, the first and second clamping members 210a and 210b are prepared to have seating grooves 211 corresponding to pipes P of various diameters, and the first and second clamping members according to the diameters of the pipes P. By replacing (210a, 210b) it is possible to cut the tube for the various types of spent fuel skeleton (10).

In addition, the first and second clamping members 210a and 210b may have interference when the underwater driving unit 110 moves downward to position the first and second clamping members 210a and 210b on both sides of the pipe P. The lower end 212 has a narrower shape toward the lower side so as not to occur. In addition, an inner groove 213 may be formed in the first and second clamping members 210a and 210b so as to prevent interference when the cutting member 310 is moved up and down in the upper portion of the seating groove 211.

On the other hand, the clamping driving member 230 is driven by pneumatic as to drive a pair of clamping members 210 to approach the pipe (P) or away from the pipe (P). That is, the clamping driving member 230 is preferably operated by pneumatic pressure, such as an air cylinder so that excessive force is not applied when the clamping member 210 clamps the pipe (P). However, a configuration for controlling the clamping force may be used while operating the clamping driving member 230 by hydraulic pressure. At this time, the tube or cable (C) is connected to the clamping driving member 230 for the operation of the air cylinder.

In addition, the support member 220 supports the clamping member 210 in a movable state when the clamping member 210 is moved by the driving of the clamping driving member 230. The support member 220 may also be operated by pneumatic pressure, such as an air chuck, but is not limited thereto. A hydraulically actuated structure or another mechanical structure may be applied. At this time, the support member 220 may be coupled to the outer side of the cutting unit housing 370 or the transfer unit housing 490 which will be described later.

And, the pipe cutout 300 is configured to cut between the supported both ends of the pipe (P) in the state of supporting both ends of the pipe (P).

3 to 9, the tube cutting unit 300, the cutting member 310 for cutting the tube, and the rotary drive unit 320 for providing a driving force for the rotation of the cutting member 310 and A rotational force transmission unit 330 for transmitting the rotational force of the rotational drive unit 320 to the cutting member 310 and a cutting unit housing 370 in which the rotational force transmission unit 330 is installed may be provided.

The cutting member 310 may be configured as a diamond wheel so that the cutting of the pipe (P) can be made well, but is not limited thereto. In addition, in order to minimize the impact applied to the pipe (P) during cutting, the rotational speed of the cutting member 310 is preferably a minimum rotational speed that can be cut, it is preferable that the diamond wheel is driven at 1200rpm or less.

In addition, a hydraulic motor may be used for the rotation driving unit 320, and an underwater hydraulic motor may be used to operate even when water is introduced into the cutout housing 370 due to an incomplete operation of the sealing member S. The rotation driving unit 320 is preferably configured to enable the speed control to adjust the rotational speed of the cutting member (310).

In addition, the rotational force transmitting member 330 is to transmit the rotational force according to the rotation of the rotary drive unit 320 to the cutting member (310).

The rotational force transmission member 330 may be configured to change the direction of the rotational force consisting of the first rotational force transmission member 340 and the second rotational force transmission member 350.

At this time, the first rotational force transmitting member 340 is rotated in accordance with the rotation of the rotary drive unit 320 and the first shaft 341 extending in the vertical direction, the first provided on the lower end of the first shaft 341 It may include a gear 342, the second rotational force transmission member 350 is provided with a second shaft 351 is fixed to one end of the cutting member 310, and the other end of the second shaft 351 And a second gear 352 engaged with the first gear 341 and rotating.

In addition, the rotational force transmission member 330 to minimize the distance in the width direction occupied when the cutting member 310 is moved up and down, that is, the distance between the pair of clamping members 210 to enable a stable cutting of the pipe (P). It is preferable to change the direction of rotation at right angles.

To this end, the first shaft 341 is formed longer than the second shaft 351 and extends downwardly, and the first gear 341 and the second gear 342 have a right angle of rotation. It can be configured to achieve. The first gear 341 and the second gear 342 may be configured as a bevel gear as an example.

On the other hand, the cutting unit housing 370 may be a rotary driving unit 230 is installed on the upper portion, the cutting member 310 may be mounted on the lower portion. In addition, as will be described later, the upper surface 371 of the cutout housing 370 may be coupled to the motor housing 473 of the feeder 400 so that the cutout 300 may be lifted up and down as a whole by the transfer of the feeder 400. Can be.

In addition, the cutout housing 370 has a structure in which both side surfaces of the lower part are opened, and the head housing 362 is installed in a sealed state through the sealing member S on one open side, and the cover 361 is provided on the other open side. Can be installed in a sealed state via the sealing member.

In this case, the head housing 362 is configured to be rotatably installed in a state where the other end of the second shaft 351 is exposed, and for this purpose, a bearing B is provided between the head housing 362 and the second shaft 351. ) Can be installed.

In addition, the cutting member 310 is fixed to the second shaft 351 by the cutting member fixing part 315.

On the other hand, the rotation driving unit 320 transmits a rotational force to the first shaft 341 via the coupling 335, the first shaft 341 is smoothly rotated through the bearing (B) installed at both ends. . In addition, between the periphery of the first shaft 341 and the inner circumferential surface of the cutout housing 370, the position of the bearing (B) provided at both ends of the first shaft (341) spaced apart from the first shaft (341) by a predetermined interval. Fixing member 365 for fixing the can be installed.

In addition, the transfer part 400 transfers the tube cut part 300 to a cutting position, that is, in a downward direction, in a state in which the pipe clamping part 200 clamps the pipe P.

The transfer unit 400 is a vertical drive unit 410 for providing a driving force required for the vertical movement of the pipe cutting unit 300, and a power transmission unit for transmitting the driving force of the vertical drive unit 410 to the pipe cutting unit 300 ( 450).

The up and down drive unit 410 may include a hydraulic motor 411, and an actuator 412 coupled to the hydraulic motor 411 through the first and second couplings 421 and 422. In this case, the actuator 412 may be configured as a reducer to limit the rotational speed of the cutting member 310 by reducing the rotational speed of the hydraulic motor 411. In addition, the hydraulic motor 411 may be an underwater hydraulic motor to be operable even when water is introduced into the housing.

In addition, the power transmission unit 450 is connected to the cutout housing 370 is configured to move the cutout housing 370 up and down. As a result, the entire tube cut part 300 including the cut part housing 370 moves up and down as the vertical drive part 410 is driven.

In detail, the power transmission unit 450 includes a first power transmission unit 460 coupled through a third coupling 441 so as to rotate by the rotational driving of the vertical driving unit 410, and the first power. It may be provided with a second power transmission unit 470 that moves up and down according to the rotation of the transmission unit 460.

At this time, the first power transmission unit 460 is made of a stud member formed with a thread on the outer peripheral surface and the second power transmission unit 470 is a nut portion formed with a screw thread on the inner peripheral surface so as to move up and down according to the rotation of the stud member. It may include.

In addition, the second power transmission member 470 may be coupled to the upper surface 371 of the cutout housing 370 so that the pipe cutting part 300 may be raised or lowered as the second power transmission part 470 moves up or down. 473 and a fixing block 472 for fixing the nut part 471 and the motor housing 473.

In addition, the transfer unit 400 includes a transfer unit housing 490 surrounding an outer circumferential surface of the motor housing 473, and the lower portion of the motor housing 473 and the transfer unit housing 490 move the motor housing 473 up and down. The sealing member S is installed to maintain the sealing.

On the other hand, the upper surface 491 of the transfer unit housing 490 is fixed to the connecting pipe 121 of the connecting portion 120.

In addition, the underwater driving unit 100 includes an image unit 500 to observe the situation in which the tube clamping unit 200 clamps the tube P and the state in which the tube cutting unit 300 cuts the tube P. can do.

As shown in FIGS. 3 to 5, the image part 500 protrudes from the cutting part housing 370 provided in the cutting part 300 or the transfer part housing 490 provided in the conveying part 400. An extension part 520, a pivoting part 530 rotatably connected to the extension part 520 and configured to adjust a range in which the camera 510 is photographed, and fixed to the pivoting part 530 and a camera ( A camera support 540 supporting the 510 may be provided.

Next, the connector 120 and the operation unit 130 will be described with reference to FIG. 3.

The connection part 120 is coupled to the upper side of the underwater driving unit 110, more specifically, the transfer unit housing 490 of the transfer unit 400 to connect the underwater driving unit 110 and the operation unit 130.

That is, since the underwater driving unit 110 is operated in a water tank of about 10m or less, the connection part 120 is configured to connect the underwater driving unit 110 with the manipulation unit 130 exposed on the surface of the water. To this end, the connection portion 120 is preferably configured in a state in which a plurality of connection pipes 121 are coupled.

In addition, the operation unit 130 is connected to the upper side of the connection portion 120 is provided on the upper surface, and is configured to move the underwater driving unit 110 to a workable position.

That is, the operation unit 130 is a hook 137 connected to the crane to support the crane in the state in which the underwater drive unit 110 and the connection unit 120 is located in the water, and to cut the pipe (P) By providing a handle 139 used for adjusting the position of the underwater drive unit 110, the tube clamping unit 200 is positioned at the position of the tube P to be cut.

On the other hand, the operation unit 130 prevents the cutting of the other pipe (P) not clamped by the cutting member 310 when the cutting operation is made while the pipe cutting unit 300 is lowered by the drive of the transfer unit 400. In order to prevent the falling of a predetermined value (for example, 25mm) or more of the pipe cutout 300 may be provided with a limit switch 135.

In addition, the control unit 130 may be provided with a regulator, a valve 132, a flow control unit 134 for controlling the hydraulic motor 411, the rotary drive unit 320, the clamping drive member 230, and the like.

It looks at the operation of the spent fuel skeleton cutting device 100 having the configuration as described above.

The spent fuel skeleton 10 is located inside the tank. At this time, the spent fuel skeleton 10 is preferably located on the jig (J) as shown in Figure 9 so as to minimize the movement of the spent fuel skeleton (10) during the cutting operation.

First, by operating a crane in a state in which a crane (not shown) is connected to the hook 137 of the operation unit 130, the pipe clamping unit 200 of the underwater driving unit 110 is positioned close to the pipe P. Then, the crane 137 and the handle 139 are manipulated while checking the image of the camera 510 to allow the clamping member 210 to be positioned at a position where the pipe P can be clamped.

When the clamping driving member 230 is operated in this state, a pair of clamping members 210 support both sides of the pipe P.

As described above, the lower end of the cutting member 410 is driven by driving the vertical driving unit 410 of the transfer unit 400 while checking the image by the image unit 500 while stably supporting the tube P. ) To be a predetermined distance (for example, 15 mm upwards).

In this state, when the rotary drive part 320 of the cutting part 300 is driven, the cutting member 310 rotates, and when the vertical driving part 410 of the transfer part 400 is driven, the cutting member 310 rotates and descends. As a result, the pipe P is cut.

In addition, in order to prevent the cutting of another pipe P which is not clamped by the cutting member 310, when the lowering of a predetermined value (for example, 25 mm) or more occurs in the pipe cutting part 300, the upper and lower driving parts 410 are formed. Stop and stop the rotation of the cutting member (310). At this time, when the cutting member 310 is lowered by a predetermined value, it is recognized as cutting completion and the vertical driving unit 410 is controlled by a controller (not shown) to automatically return to the initial position by driving the vertical driving unit 410 in the reverse direction. It is desirable to.

As such, when the cutting is completed, the clamping driving member 230 is operated to release the clamping state of the pipe P, and the manipulation unit 130 is operated to move the underwater driving unit 110 to another cutting position.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I want to make it clear.

100 ... Tube Cutting Device for Spent Fuel Skeletons
110 ... Underwater Drive
120 ... connection 121 ... connector
130 ... Control panel 131 ... Control panel housing
132 ... Regulators and Valves 134 ... Flow Controls
135 ... Limit switch 137 ... Hook
139 ... handle 200 ... tube clamping part
210 ... clamping member 210a ... first clamping member
210b ... 2nd clamping member 211 ... Tube seating groove
212 ... End 213 ... Inner groove
220 ... support member 230 ... clamping drive member
300 ... tube cutout 310 ... cutout
315 ... cutting member fixing part 320 ... rotary drive part
330 ... torque transmission section 340 ... first torque transmission section
341. First shaft 342 ... First gear
350. 2nd torque transmission part 351 ... 2nd shaft
352 ... 2nd Gear 361 ... Cover
362 ... head housing 370 ... cut housing
400 ... Feed 410 ... Up and Down Drive
411 ... hydraulic motor 412 ... actuator
421 ... first coupling 422 ... second coupling
441 ... 3rd coupling 450 ... Power train
460 ... first power train 470 ... second power train
471 nut 472 fixing block
473 ... motor housing 490 ... transfer housing
491 ... Top 500 ... Video
510 ... camera 520 ... extension
530 ... pivot 540 ... camera support
B ... Bearing S ... Seal

Claims (18)

Tube clamping portion for supporting both ends of the tube provided in the spent fuel skeleton;
A pipe cutting part for cutting between the supported both ends of the pipe while the pipe clamping part supports both ends of the pipe; And
A pipe cutting device for spent nuclear fuel skeleton comprising a; transfer unit for transferring the pipe cutting to the cutting position. The method of claim 1,
The pipe clamping unit, the pipe cutting unit and the conveying unit pipe cutting device for spent nuclear fuel skeleton, characterized in that it comprises an underwater drive unit installed in a sealed state to be operable in the water. The method of claim 1,
The tube clamping portion includes a pair of clamping members for supporting the tube on both sides of the cutting member provided in the tube cutting portion, and a clamping driving member for driving the pair of clamping members to approach or away from the tube. A tube cutting device for spent fuel skeletons, characterized in that. The method of claim 3,
The pair of clamping members each have a first and second clamping members for accessing from both sides of the tube by the driving of the clamping driving member to perform the clamping operation of the tube. . 5. The method of claim 4,
And the first and second clamping members have a seating groove having an arc shape corresponding to the outer diameter of the tube so as to contact the tube. The method of claim 3,
And said tube clamping portion further comprises a support member for supporting said pair of clamping members in a movable state. The method according to claim 6,
At least one of the clamping driving member and the support member is a tube cutting device for spent nuclear fuel skeleton, characterized in that operated by pneumatic. The method of claim 1,
The pipe cutting unit, a cutting member for cutting the tube, a rotary drive unit for providing a driving force required for the rotation of the cutting member, a rotational force transmission unit for transmitting the rotational force of the rotary drive unit to the cutting member, and the rotational force transmission unit is installed A pipe cutting device for spent nuclear fuel skeleton, characterized by comprising a cutout housing. 9. The method of claim 8,
The cutting member is made of a diamond wheel, the rotation speed of the diamond wheel is a pipe cutting device for spent nuclear fuel skeleton, characterized in that driven at less than 1200rpm. 9. The method of claim 8,
The rotational force transmission member,
A first rotational force transmitting member including a first shaft which rotates according to the rotation of the rotation driving unit and extends in a vertical direction, and a first gear provided at a lower end of the first shaft; And
And a second rotation force transmitting member including a second shaft fixed to one end of the cutting member, and a second gear provided at the other end of the second shaft to rotate in engagement with the first gear. Tube cutting device for spent fuel skeleton. 9. The method of claim 8,
The first shaft is formed longer than the second shaft and extends downwardly,
The first gear and the second gear pipe cutting device for spent nuclear fuel skeleton, characterized in that the axis of rotation is perpendicular to each other. 9. The method of claim 8,
The cutout housing has a structure in which both sides of the lower portion is open, a head housing is installed at one open side, and a cover is installed at the other open side.
And the head housing is configured to be rotatably installed in a state where the other end of the second shaft is exposed. The method of claim 12,
And a sealing member is installed between the head housing and the cutout housing. 9. The method of claim 8,
And the conveying unit includes a vertical driving unit providing a driving force necessary for vertical movement of the tube cutting unit, and a power transmission unit for transmitting the driving force of the vertical driving unit to the tube cutting unit. 15. The method of claim 14,
And the power transmission unit is connected to the cutout housing to move the cutout housing up and down by a predetermined amount. 16. The method of claim 15,
The power transmission unit includes a first power transmission unit that rotates by rotational driving of the vertical drive unit, and a second power transmission unit that moves up and down according to the rotation of the first power transmission unit,
And said second power transmission member is coupled to said cutout housing. The method according to claim 1 or 2,
Imaging unit for observing the cutting situation of the tube; Pipe cutting device for spent nuclear fuel skeleton, characterized in that it further comprises. 18. The method of claim 17,
The image part may include an extension part protruding from a cutting part housing provided in the cutting part or a transfer part housing provided in the transfer part, a pivot part connected to the extension part so as to be rotatable, and fixed to the pivot part. A tube cutting device for spent nuclear fuel skeleton, characterized by comprising a camera support for supporting.

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