JP4453186B2 - Mark confirmation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a title confirmation apparatus.
[0002]
[Prior art]
In recent years, it has been planned that radioactive waste liquid is vitrified and stored in a stable state until decay heat is removed.
[0003]
FIGS. 6-8 shows an example of the mark confirmation apparatus used for a vitrified body storage facility. This mark confirmation apparatus includes a gantry 3 in a receiving chamber 2 defined by a shielding wall 1, and a turntable 4 provided on the gantry 3 so as to be horizontally and circumferentially rotatable. The six rotation receiving bases 5 provided on the turning table 4 so as to be rotated horizontally and circumferentially, and the symbols such as the symbols and numbers of the glass solidified bodies 6 mounted on the rotation receiving base 5 are photographed. And a camera 7 (measuring device) provided on a stand 7a.
[0004]
The gantry 3 is formed in a frame shape whose outer edge portion forms a regular hexagon when viewed from above, and is installed on the building floor portion 8 of the receiving chamber 2 which is a radiation management area. A swivel bearing 9 is attached to the center portion of the gantry 3, and a plurality of rollers 10 are arranged at equal intervals in the circumferential direction on the periphery of the upper surface of the gantry 3. It is rotatably supported.
[0005]
The swivel table 4 has a column-shaped post 11 whose lower end is pivotally supported by the pedestal 3 by a slewing bearing 9 in the center, and a substantially disc-shaped table main body 12 that covers the pedestal 3 from above, and the table main body. 12, a support ring 13 that is externally fitted and fixed to 12 and has a lower surface in contact with the rolling surface of the roller 10, and a ring gear 14 that is attached to be inscribed in the support ring 13.
[0006]
The ring gear 14 meshes with a table driving gear 16 of a table turning gear box 15 provided inside the gantry 3.
[0007]
A rotational driving force of a table turning motor 17 installed in a room different from the receiving chamber 2 is transmitted to the table turning gear box 15 via a through shaft 18 and a transmission shaft 19 that penetrate the shielding wall 1. It has become.
[0008]
The rotation cradle 5 is formed in a circular tray shape and is pivotally supported on the upper surface of the table body 12 of the swivel table 4 so that the respective rotation centers are located at an equal distance from the center of the post 11 via the swivel bearing 20. Yes. In addition, a rotation shaft 21 is provided at the bottom of the rotation receiving base 5 so as to pass through the table body 12 so as to be rotatable downward. A spur gear 22 is fitted to the lower end of the rotation shaft 21. It is worn.
[0009]
The spur gear 22 is connected to the cradle drive gear 24 of the cradle rotation gear box 23 provided inside the gantry 3 when the rotation cradle 5 arrives near the place where the camera 7 is arranged as the turning table 4 rotates. It is designed to mesh. A rotational driving force of a cradle rotating motor 25 installed in a room different from the receiving chamber 2 is transmitted to the cradle rotating gear box 23 through a through shaft 26 and a transmission shaft 27 that penetrate the shielding wall 1. It has become so.
[0010]
Further, the receiving chamber 2 in which the above-described mark confirmation device is installed is provided with a solidified body transfer crane. The solidified body transfer crane has a suspension device 29 suspended by a traversable crane girder (not shown) located above the mark confirmation device, and has a gripping portion 28 provided at the upper end of the glass solidified body 6. It can be gripped. Then, the traverse of the crane girder, the gripping and releasing of the gripping portion 28 of the vitrified body 6 by the suspension device 29, and the lifting and lowering of the vitrified body 6 are performed, and the turntable 4 is moved from the delivery position on the side of the mark confirmation device. An operation for mounting the vitrified body 6 on the rotating cradle 5 at a predetermined position and an operation for paying out the vitrified body 6 from the rotating cradle 5 to the delivery position are performed.
[0011]
When the mark of the vitrified body 6 is confirmed using the mark confirmation device shown in FIGS. 6 to 8, the turning table 4 is rotated by 60 ° by the table turning motor 17 and mounted on the turntable 5. The glass vitrified body 6 is sequentially opposed to the camera 7.
[0012]
When the turntable 5 reaches the vicinity of the position where the camera 7 is disposed as the turning table 4 rotates, the spar gear 22 attached to the turntable 5 and the pedestal rotation gear box 23 are driven. The gear 24 meshes with each other.
[0013]
Therefore, when the mark of the vitrified body 6 mounted on the rotating cradle 5 that has reached the vicinity of the place where the camera 7 is located is not within the angle of view of the camera 7, the rotating cradle 5 is driven by the cradle rotating motor 25. Is rotated as appropriate, and the orientation of the vitrified body 6 is adjusted according to the angle of view of the camera 7. The image signal of the camera 7 and the measurement signal of the other measuring device are output to a display device (not shown) outside the receiving chamber 2.
[0014]
Further, whether the vitrified body 6 is present on the rotary cradle 5 of the mark confirmation device is determined by whether or not the weight signal of the load cell attached to the lifting rope of the crane for transferring the solidified body, The amount of power supplied to the lifting motor that is fed out, the amount of power supplied to the traveling motor that traverses the crane girder, and the like can be obtained as criteria.
[0015]
[Problems to be solved by the invention]
In the above-described mark confirmation device, the through shaft 18 and the transmission shaft 19 for driving the table drive gear 16 are broken, or the ring gear 14 and the table drive gear 16 are spilled, or the ring gear 14 and the table drive gear 16 When a failure occurs in the turning drive system of the turntable 4 such as when a foreign object is caught between the turntable 4 and the turntable 4, the turntable 4 cannot be turned.
[0016]
Thus, when rotation of the turning table 4 becomes impossible, there is a possibility that the vitrified body 6 is left on the turntable 5 of the turning table 4. When the highly radioactive vitrified body 6 is left in the receiving chamber 2 in this way, the worker cannot enter the receiving chamber 2 for access to access the device for repair, and thus repair is impossible. There is a problem of becoming.
[0017]
The present invention has been made in view of the above-described circumstances. Even when a failure occurs in the turning drive system of the turning table, the turning table can be turned by using the power of the solidified body transfer crane. An object of the present invention is to provide a marking confirmation device.
[0018]
[Means for Solving the Problems]
The present invention is a table drive driven by a swivel table provided in a receiving chamber in a shielding wall so as to be pivotable substantially horizontally, and a through-shaft that meshes with a ring gear formed on the swivel table and penetrates the shielding wall. A rotating cradle mounted with a gear and a glass solid body that is provided on the swivel table so as to be pivotable substantially horizontally and is suspended by a lifting device of a solidified body transfer crane, and is rotated separately from the swivel table. And a measuring device that is arranged in the vicinity of the swivel table and performs the mark confirmation of the vitrified body, and is pushed up by a push-up spring inside the cylinder at a position near the swivel table. And a table driving device provided with a lifting device that can be lifted by a lifting device on the upper side of the piston. The lifting device is suspended on the lifting device, and the piston is pushed down against the lifting spring. And a table releasing device for releasing the table drive gear from meshing with the ring gear, and a table rotating device for rotating the turning table by the lifting force when the lifting device is lifted by the lifting device. This relates to a title confirmation device characterized by the following.
[0019]
In the above means, the mesh release device includes a table drive gear meshed with the ring gear supported by the support member, and the support member supported by the fixed base by the fixed support pin and the detachable pin that can be inserted and removed with the table drive gear interposed therebetween. And an urging spring for urging the table drive gear away from the ring gear between the detachable pin side of the support member and the fixed base, and a longitudinally extending release bar. The attachment / detachment pin is fixed to the middle portion in the direction, and when the suspension device is placed on the suspension device of the table drive device and the piston is lowered, the release bar is rotated so that the attachment / detachment pin is pulled out from the support member. It is characterized by that.
[0020]
Further, in the above means, the table rotating device comprises a concentric cylindrical ratchet wheel on the turning table, and the other end of the cord-like body fixed at one end to the suspension of the table driving device is laterally moved by a deflection wheel. The ratchet body is connected to one end of a ratchet body provided with a plurality of ratchets that can be engaged with the ratchet wheel, and the other end of the ratchet body is connected to a pulling spring. The ratchet is meshed with the ratchet wheel, and the turning table is rotated.
[0021]
According to the mark confirmation device of the present invention, the engagement release device that releases the engagement between the table drive gear and the ring gear only by placing the suspension device on the suspension of the table drive device by the solid transfer crane, and the solid transfer The table rotation device is equipped with a table rotating device that moves by engaging the ratchet of the ratchet body with the ratchet wheel fixed to the turning table only by lifting the lifting tool of the table drive device by the crane lifting device. When a failure occurs in the drive system, the turning table can be arbitrarily rotated only by operating the solid transfer crane.
[0022]
Therefore, even when a trouble occurs in the swivel drive system of the swivel table, it is possible to swivel the swivel table and carry out all the vitrified bodies on the turntable to the outside of the receiving chamber. For example, the worker for entering the receiving room can repair the turning drive system of the turning table in which the trouble has occurred.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0024]
1 and 2 show an example of the embodiment of the mark confirmation apparatus of the present invention. In the figure, the same reference numerals as those in FIGS. 6 to 8 denote the same parts.
[0025]
This marking confirmation device has a piston 32 which is pushed up by a push-up spring 31 inside a cylinder 30 at a predetermined position in the vicinity of the turning table 4, and a lifting device 29 of a solidified body transfer crane is provided above the piston 32. A table driving device 34 having a lifting tool 33 that is lifted via the grip portion 28 is disposed.
[0026]
Then, the suspension device 29 is suspended on the suspension tool 33 of the table drive device 34 so that the table drive gear 16 is released from meshing with the ring gear 14 when the piston 32 is pushed down against the push-up spring 31. And the table rotating device 36 that rotates the turning table 4 by the lifting force when the lifting tool 33 is lifted by the lifting device 29.
[0027]
The mesh release device 35 pivotally supports the table drive gear 16 meshing with the ring gear 14 on a support member 38 disposed on a fixed base 37 fixed to the gantry 3. Further, the fixed support pin 40 of the transmission gear 39 meshing with the table drive gear 16 is passed through the support member 38 and the fixed base 37, and the fixed support pin 40 is inserted into the table turning gear box 15 through FIG. The transmission shaft 19 is connected.
[0028]
Further, a detachable pin 41 penetrating through the through hole 37a of the fixed base 37 and the through hole 38a of the support member 38 is provided at a position opposite to the fixed support pin 40 across the table drive gear 16 so as to be removable. ing. Further, an urging spring 42 that presses the support member 38 in a direction to separate the table drive gear 16 from the ring gear 14 is disposed between the side of the support member 38 where the detachable pin 41 is provided and the fixed base 37. Yes.
[0029]
A roller 43 is provided between the piston 32 of the table drive device 34 and the push-up spring 31. One end of the roller 43 is connected to the roller 43, and the other end passes through the lower side of the detachable pin 41. A release bar 45 that is pivotally supported by a support shaft 44 provided in the upper and lower portions and that can be rotated in the vertical direction is provided.
[0030]
Therefore, when the suspension device 29 is placed on the suspension tool 33 of the table drive device 34 and the piston 32 is lowered by its weight, the release bar 45 is rotated downward, and the detachable pin 41 is moved from the support member 38. It is designed to be pulled out. When the release bar 45 is rotated, the roller 43 slides between the piston 32 and the push-up spring 31.
[0031]
The table rotating device 36 has a cylindrical ratchet wheel 46 concentric with the turning table 4 and fixed to the turning table 4. Further, one end of the cord-like body 47 is fixed to the hanging tool 33 of the table driving device 34, and the cord-like body 47 is guided in the lateral direction in the vicinity of the ratchet wheel 46 by the deflection wheel 48 provided at the lower part of the cylinder 30. The ratchet wheel 50 is connected to one end of a ratchet body 50 having a plurality of ratchets 49 that can mesh with the ratchet wheel 46. Further, the other end of the ratchet body 50 is connected to the pull spring 51 so as to hold the cord-like body 47 in a tensioned state.
[0032]
Therefore, when the lifting tool 33 is lifted by the lifting device 29, the ratchet body 50 is pulled against the pulling spring 51 by the cord-like body 47, and the ratchet 49 of the ratchet body 50 meshes with the ratchet wheel 46 and moves. Thus, the turning table 4 is rotated.
[0033]
The operation of the above embodiment will be described.
[0034]
In the normal state of the mark confirmation device, as shown in FIGS. 1 and 2, the table drive gear 16 is engaged with the ring gear 14, and the detachable pin is inserted into the through hole 37a of the fixed base 37 and the through hole 38a of the support member 38. 41 is inserted, and the support member 38 is held in a state where the table drive gear 16 and the ring gear 14 are engaged with each other by the fixed support pin 40 and the detachable pin 41. Thereby, the rotational driving force of the table turning motor 17 (see FIG. 6) outside the receiving chamber 2 is transmitted to the table driving gear 16 via the through shaft 18, the transmission shaft 19, the table turning gear box 15, and the transmission gear 39. Then, the turning table 4 is rotated. Accordingly, as shown in FIG. 7 and FIG. 8, the solidified crane 6 is used to sequentially mount the glass solidified body 6 on the mark confirmation device by the solid transfer crane and perform the operations such as the confirmation of the mark. After completion of the work, the vitrified body 6 is discharged from the turntable 5 to the delivery position by a solid transfer crane.
[0035]
In the above-described mark confirmation device, the through shaft 18 and the transmission shaft 19 for driving the table driving gear 16 are broken, or the ring gear 14 and the table driving gear 16 are spilled, or the ring gear 14 and the table driving gear 16 are broken. If a failure in the turning drive system of the turning table 4 occurs such that a foreign object is caught between the turning table 4 and the turning table 4, the turning table 4 cannot be turned.
[0036]
Thus, when a failure occurs in the turning drive system of the turning table 4, the solid transfer crane is operated and the suspension device 29 is placed on the suspension 33 of the table drive device 34. Then, the piston 32 is lowered by the weight of the suspension device 29, and the engagement between the table driving gear 16 and the ring gear 14 is released by the engagement release device 35.
[0037]
That is, when the piston 32 is lowered, the release bar 45 is rotated downward about the support shaft 44 via the roller 43. Then, the detachable pin 41 fixed to the intermediate portion 45 a of the release bar 45 is pulled out from the support member 38. When the detachable pin 41 is pulled out, as shown in FIGS. 3 and 4, the support member 38 pressed by the biasing spring 42 rotates inwardly around the fixed support pin 40, and the table drive gear 16 is separated from the ring gear 14, and the meshing between the table drive gear 16 and the ring gear 14 is released. Thereby, even if a failure occurs in the turning drive system of the turning table 4, the turning table 4 can be freely rotated.
[0038]
Subsequently, as shown in FIG. 5, the holding part 28 of the hanging tool 33 is held by the hanging device 29 to lift the hanging tool 33. Then, the ratchet body 50 is pulled against the pulling spring 51 by the cord-like body 47, and the ratchet 49 of the ratchet body 50 meshes with the ratchet wheel 46 and moves, whereby the turning table 4 rotates by a predetermined angle. .
[0039]
Next, the lifting device 29 hangs the lifting tool 33 on the table driving device 34. Then, the ratchet body 50 is pulled back to the original position by the pulling spring 51. At this time, the ratchet 49 of the ratchet body 50 is pushed in by contact with the ratchet wheel 46 and does not mesh with the ratchet wheel 46. When the lifting device 33 is lifted again by the lifting device 29, the ratchet 49 of the ratchet body 50 is again engaged with the ratchet wheel 46, and the turning table 4 is rotated by a predetermined angle. Can be arbitrarily rotated.
[0040]
Accordingly, the swivel table 4 is rotated, and all the vitrified bodies 6 on the rotation receiving base 5 can be moved to the delivery position by the solidified body transfer crane and carried out of the receiving chamber 2. Therefore, it becomes possible for an operator to enter the receiving room 2 for repairing and to perform work such as repairing a faulty part.
[0041]
It should be noted that the mark confirmation device of the present invention is not limited to the above-described embodiment, and the mechanism and configuration of the mesh release device and the table rotation device can be variously changed, and other scopes do not depart from the gist of the present invention. Of course, changes can be made.
[0042]
【The invention's effect】
As described above, according to the mark checking device of the present invention, the mesh release for releasing the meshing between the table drive gear and the ring gear only by placing the suspension device on the suspension of the table drive device by the solid transfer crane. The table and the table rotating device that moves by moving the ratchet of the ratchet body to the ratchet wheel fixed to the turning table only by lifting the lifting device of the table drive device by the lifting device of the solid transfer crane. When a failure occurs in the turning drive system of the turning table, there is an effect that the turning table can be arbitrarily turned only by the operation of the solid transfer crane.
[0043]
Therefore, even when a trouble occurs in the swivel drive system of the swivel table, it is possible to rotate the swivel table and carry out all the vitrified bodies on the turntable to the outside of the receiving chamber. There is an effect that an operator for repair can enter the receiving room and repair the turning drive system of the turning table in which the failure has occurred.
[Brief description of the drawings]
FIG. 1 is a partially cut plan view showing an example of an embodiment of a mark confirmation apparatus of the present invention.
FIG. 2 is a schematic side view of FIG.
FIG. 3 is a partially cut plan view showing different operating states of the apparatus of FIG. 1;
4 is a schematic side view of FIG. 3;
FIG. 5 is a schematic side view showing the different operating states of FIG. 3;
FIG. 6 is a cut plan view showing an example of a mark confirmation device used in a conventional vitrified body storage facility.
7 is a cutaway side view of the mark confirmation device of FIG. 6. FIG.
FIG. 8 is a plan view of FIG. 7 viewed from the direction VIII-VIII.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shielding wall 2 Receiving chamber 4 Turning table 5 Rotating cradle 6 Vitrified body 7 Camera (measuring device)
14 Ring gear 16 Table drive gear 18 Through shaft 29 Lifting device 30 Cylinder 31 Push-up spring 32 Piston 33 Lifter 34 Table drive device 35 Engagement release device 36 Table rotation device 37 Fixing base 38 Support member 40 Fixed support pin 41 Removable pin 42 Energizing force Spring 45 Release bar 45a Intermediate part 46 Ratchet wheel 47 Cord-like body 48 Deflection wheel 49 Ratchet 50 Ratchet body 51 Pull spring

Claims (3)

A swivel table provided in a receiving chamber in the shielding wall so as to be rotatable substantially horizontally; a table driving gear which is engaged with a ring gear formed on the swivel table and driven by a through shaft penetrating the shielding wall; A turntable that is mounted on a swivel table so as to be pivotable substantially horizontally and is mounted with a glass solid body suspended by a suspension device for a solidified body transfer crane, and is pivoted separately from the swivel table, and the swivel table And a measuring device for confirming the mark of the vitrified body, in the vicinity of the swivel table, a piston that is pushed up by a push-up spring is provided inside the cylinder. And a table driving device provided with a lifting device that can be lifted by a lifting device on the upper side of the piston. When the lifting device is suspended on the lifting device and the piston is pushed down against the lifting spring, A mesh release device for releasing the bull drive gear from meshing with the ring gear, and a table rotating device for rotating the turning table by the lifting force when the lifting device is lifted by the lifting device. The title confirmation device. In the mesh release device, a table drive gear meshing with the ring gear is supported by a support member, and the support member is supported by a fixed base by a fixed support pin and a detachable pin that can be inserted and removed with the table drive gear interposed therebetween, and An urging spring is provided between the detachable pin side of the support member and the fixed base to urge the table drive gear in a direction away from the ring gear. The attachment / detachment pin is fixed, and when the suspension device is placed on the suspension device of the table driving device and the piston is lowered, the release bar is rotated so that the attachment / detachment pin is pulled out from the support member. The mark confirmation device according to claim 1, wherein: The table rotating device includes a concentric and cylindrical ratchet wheel on the swivel table, and further guides the other end of the cord-like body fixed at one end to the suspension of the table driving device to the lateral direction by a deflection wheel to the ratchet wheel. Connected to one end of a ratchet body having a plurality of meshable ratchets, and connected to the other end of the ratchet body with a pulling spring, and when the lifting device is lifted by a lifting device, the ratchet body ratchet meshes with the ratchet wheel 3. The mark confirmation device according to claim 1, wherein the turning table is rotated.

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