JPH1010298A - Opening method for solid waste containing can and opening processing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely perform opening work by inserting the insertion part of a rotating mechanism in a coupling recess part on an upper lid for positioning, loosening tightening bolts by the rotation of a socket wrench coupled in the tightening bolts and separating the upper lid from the can body. SOLUTION: A suspension tool 11 of a suspension stage 10 is suspended with a crane and a can opening device A is moved to above a solid waste container can P. At this state, the insertion part 27 of a rotation mechanism 20 is lowered and inserted in a coupling recess part (e) formed on the upper lid (a) of the container can P to position the container can P to the opening device A. Then, a clamp part 35 is retired on both sides of the hanging hook of the upper lid (a) and a socket wrench 43 is rotated to adjust immediately above the tightening bolts (g). Next, after releasing the tightening of all bolts (G) by replacing the wrench 43, the hanging hook is grasped by closing clamp part 35 and the suspension stage 10 is lifted up so that only the upper lid (a) part is separated from the can body (b).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for opening a solid waste storage can.

[0002]

2. Description of the Related Art In a spent fuel rod cladding tube, after removing useful substances such as unburned uranium in a fuel reprocessing step or the like, a sheared piece (cut piece) is cut by cutting with a shear and a cutter. Furthermore, it is transported to a sorting work place by a storage container (hull can), and the sheared pieces are scattered on a sorting table, and metal scraps such as stainless steel mesh, fiber scraps, and plastic scraps mixed in the sheared pieces. A sorting operation is performed in which combustible materials and the like are removed to leave zirconium (and its alloy).

[0003] Such a sorting operation is performed in a cell room isolated from the living environment in order to prevent the diffusion of radioactive materials. Before performing the sorting operation, the solid waste storage can is opened and stored. It is necessary to take out the sheared fragments, which are objects, by tilting the solid waste storage can or the like.

[0004]

However, when the operation of opening the solid waste storage can is performed in the cell room, the operation must be performed by remote control in order to open the radiation control area. Therefore, the opening processing equipment becomes large-scale, and it is necessary to secure an installation space for the equipment, and there is technical difficulty due to remote control. Also,
If the unsealing operation is performed outside the cell chamber, it is necessary to predict the occurrence of the scattering phenomenon of the radioactive substance, and it becomes difficult to take countermeasures.

[0005] The present invention is to solve such problems effectively and to achieve the following objects. Ensure that solid waste storage cans are opened. To improve the removability of contaminants such as sealing materials. Minimize installation space. To improve the maintainability of equipment.

[0006]

A can opening device and an O-ring removing device are disposed inside a cell room isolated from the surrounding environment as a device for opening a solid waste storage can. For solid waste storage cans, the upper lid is removed from the can body, and the O-ring attached to the upper lid is sent out for sorting, etc., in a state where the solid waste, which is the content, can be taken out. Is done. In the can opening device, the solid waste storage container is transported to a position above the solid waste storage can in a suspended state by a crane or the like, and the insertion portion of the swivel mechanism is inserted into the engagement recess of the upper lid. It is engaged in alignment with the can. By the operation of the turning mechanism, the turning force of the lid turning motor is transmitted to the pinion via the turning force transmission system, and the turning of the pinion turns the turning table along the sun gear. When turning, disengage the clutch arranged in the middle of the rotational force transmission system, make the upper part of the clamp part free to rotate, and engage the insertion part of the turning table with the engagement recess of the upper lid. To support the turning force.
By adjusting the turning position of the turning table, the socket wrench and the fastening bolt are centered, the socket wrench is lowered to engage with the fastening bolt, and the fastening bolt operating mechanism operates the fastening bolt via the socket wrench. Loosen and release the fastening state of the upper lid. The same fastening release was performed for the fastening bolts at a plurality of locations, and after the fastening of all the fastening bolts was released, the hanging ear attached to the upper lid was grasped by the clamp portion based on the operation of the clamp driving source in the grasping mechanism. In the state (gripped state), the upper lid is cut off above the can main body by pulling up the clamp portion via the suspension base. By removing the upper lid and opening the upper opening of the can main body, the solid waste, which is the contents, can be taken out. Is performed. The detached upper lid is transported to a position above the O-ring removing device, and is placed in a state where the side engaging portion of the lower support base is engaged with the temporary placement part of the support base. The horizontal position of the scraper head is adjusted by the operation of the horizontal position adjustment mechanism.
The scraper head is brought into contact with the O-ring by operating the elevating mechanism by aligning the scraper head directly below the O-ring attached to the upper lid. When the turning mechanism in the can opening device is operated, the scraper head turns and the O-ring is peeled off from the lower surface of the upper lid. The cleaning brush of the cleaning means is brought into contact with the lower surface of the upper lid from which the O-ring is removed by adjusting the position, and the cleaning brush is rotated by the operation of the brush rotation motor to perform cleaning. In the operation of removing and cleaning these O-rings, the monitoring unit monitors the position of the scraper head and the cleaning brush, and performs inspection after the operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a method for opening a solid waste storage can and an opening processing facility according to the present invention will be described with reference to FIGS.

In FIGS. 1 to 5, reference symbol P is a solid waste storage can, a is an upper lid, b is a can main body, A is a can opening device,
B indicates an O-ring removing device.

[0009] The solid waste storage canister P is a storage container (hull can) by dissolving and removing the fuel pellets after the spent fuel rod cladding tube or the like is cut into pieces (cut pieces) in a spent fuel reprocessing step or the like. ), And is carried into the inside of the cell chamber isolated from the surrounding environment, and the upper lid a is opened (opened). A sorting operation is performed in which mixed metal refuse such as stainless steel mesh, combustibles such as fiber refuse and plastic refuse are removed to leave zirconium (and its alloy).

[0010] As facilities for opening the solid waste storage cans P related to these opening operations, can opening devices A and O are provided.
The operation of opening the solid waste storage can P described below, which is individually arranged with the ring removing device B, is performed.

The above-mentioned opening operation will be described in the order of steps with reference to the configurations of the can opening apparatus A and the O-ring removing apparatus B.

First, the outline of the opening operation of the solid waste storage can P will be described. In the solid waste storage can P, the upper lid a can be removed from the can main body b, and the solid waste can be taken out. As a state, the O-ring c sent out for the sorting process or the like and attached to the upper lid a is removed and replaced with a new one when the can body b is reused. The upper lid a is provided with a hanging ear d at the center of the upper surface, and an engaging recess e surrounded by a cylindrical wall is formed around the hanging ear d. A structure in which an open induction taper f is formed and fastened to the can body b by a fastening bolt g is employed.

[Structure of Can Opening Apparatus] The structure of the can opening apparatus A used for the opening operation will be described. As shown in FIGS.
Swivel mechanism 20, gripping mechanism 30, and fastener operating mechanism 40
It has the function of

As shown in FIGS. 1 and 2, the suspension gantry 10 supports the turning mechanism 20, the gripping mechanism 30, and the fastener operating mechanism 40, and is arranged at an upper position to be operated by a crane or the like. A suspender (suspension bail) 11 for suspending the whole, an intermediate frame 12 arranged at an intermediate position,
A lower support 13 arranged at a lower position, and an intermediate frame 1
2 and a side engaging portion 14 which is disposed on the outer peripheral portion and is engaged with the O-ring removing device B.

In the turning mechanism 20, the suspension support 1
0, a left and right two-rotational force transmission system 22 composed of a combination of a gear, a shaft, and the like connected to the lid rotation motor 21 and transmitting the rotational force to the lower side. Two pinions 23 connected to the rotational force transmission system 22, and a sun gear 24 arranged in mesh with the two pinions 23 and arranged below the lower support 13.
And a bearing 25 for rotatably supporting the sun gear 24
And a hollow hole 26a at the center attached to the sun gear 24.
, And an insertion portion 27 that is disposed below the turning table 26 and that is inserted into the engaging recess e of the upper lid a for alignment.

In the above-mentioned gripping mechanism 30, the suspension base 1
Clamp drive source (opening / closing motor) 31 mounted on 0
A worm gear 33 which is connected to the clamp drive source 31 and is constituted by a combination of gears, shafts and the like for transmitting the rotative force to the lower side; a worm gear 33 rotated by the rotative force transmission system 32; A pair of left and right worm wheels 34 meshed with 33, a clamp portion 35 which is rotated by the worm wheel 34 and is not gripped or gripped with respect to the hanging ears d of the upper lid a by opening and closing operations, and A support bracket 36 which can be opened and closed and which is attached to the turning table 26; And a clutch 37 for temporarily interrupting the transmission of torque at the time of switching.

The fastener operating mechanism 40 includes a bolt driving motor 41 mounted on the intermediate frame 12,
A torque transmission system 42 connected to the bolt driving motor 41 and configured by a combination of gears and shafts for transmitting the torque downward, and an outer peripheral portion of the lower support 13 rotated by the torque transmission system 42 A socket wrench 43 which is arranged in the vicinity and loosens and fastens by engaging and rotating the fastening bolt g; and a socket wrench 43 which is arranged between the rotational force transmission system 42 and the socket wrench 43 in an interposed state. A spline mechanism 44 that allows vertical movement of
Lifting means 45 disposed at a position above the spline mechanism 44 for raising and lowering the socket wrench 43. In the elevating means 45, the solenoid 45a which pushes down the socket wrench 43 when excited, and the socket wrench 43 which is arranged around the spline mechanism 44 is raised when the solenoid 45a is not excited to disengage with the fastening bolt g. The one having a spring 45b for bringing into a combined state is applied.

[Combination of Solid Waste Storage Can and Can Opener] The opening process of the solid waste storage can P will be described below.

[Positioning Step] In the can opening apparatus A, the portion of the hanging tool (hanging bail) 11 of the hanging frame 10 is hung by a crane or the like installed in the cell chamber.
While being transported to a position above the solid waste storage can P, the solid waste storage can P is engaged with the engagement recessed portion e formed in the upward direction on the upper lid a of the solid waste storage can P while maintaining the suspended state. . When the insertion portion 27 in the downward state of the turning mechanism 20 is lowered in accordance with the guide taper f of the engagement concave portion e of the solid waste storage can P, as shown in FIGS.
Is inserted into the engagement recessed portion e, and the can opening device A
And the solid waste storage can P are aligned. At the time of performing these alignment steps, the swivel mechanism 20 is operated to move the clamp portion 35 and the socket wrench 43 to each other as shown in FIG.
It is desirable that the insertion portion 27 is completely inserted into the engagement recessed portion e after the positioning and the turning position alignment as shown in FIG.

[Rotating Position Adjusting Step] By operating the turning mechanism 20, the rotational force of the lid turning motor 21 is transmitted to the pinion 23 via the rotational force transmission system 22, and the rotation of the pinion 23 causes the sun gear 24 and the turning. As shown in FIG. 2, the table 26 is swiveled so that the clamp 35 of the gripping mechanism 30 is retracted to both sides of the hanging ears d of the upper lid a. The turning position is adjusted so as to be immediately above the fastening bolt g. Then, after the turning position is adjusted, the clamp portion 35 retracted to both sides of the hanging ear d is closed by the operation of the gripping mechanism 30 so that the movement in the vertical direction and the movement in the radial direction of rotation are restricted. .

[Step of Unfastening Fastening Bolt] The socket wrench 43 and the fastening bolt g are centered by the turning mechanism 20, and the socket wrench 43 is lowered by the operation of the lifting / lowering means 45 of the fastener operating mechanism 40. The socket wrench 43 and the fastening bolt g are engaged with each other, and the torque of the bolt driving motor 41 is transmitted to the socket wrench 43 via the torque transmission system 42, thereby rotating the fastening bolt g and fastening the bolt. g is released.

[Retreat of Socket Wrench] In the socket wrench 43 in which the fastening bolt g has been loosened, the excitation of the solenoid 45a of the lifting / lowering means 45 is stopped so that the socket wrench 43 is moved upward to move the socket wrench 43 from the fastening bolt g. The evacuation state is released.

[Step of changing fastening release position] With the socket wrench 43 kept in the retracted state, the turning mechanism 20 is operated, and the socket wrench 43 is turned toward the next position above the fastening bolt g. Switch the engagement position with g. In the turning operation, the gripping mechanism 30
Is disengaged.

[Clearing Bolt Disengaging Step] With regard to the fastening bolt g whose engagement position has been switched, the socket wrench 43 is lowered and the engagement between the socket wrench 43 and the fastening bolt g is performed in the same manner as in the above-described fastening bolt releasing step. In this case, the fastening bolt g is relaxed. Hereinafter, for all the fastening bolts g, the work of releasing the fastening state (relaxation work) is repeated.

[Steps of gripping, suspending and moving the upper lid] After all the fastening bolts g are released, the gripping mechanism 30 is operated to close the clamp portion 35 to grip the hanging ears d. When the suspension gantry 10 is lifted by, for example, as shown in FIG.
Separated from and separated from. The upper lid a suspended from the suspension pedestal 10 is transferred to a position above the O-ring removing device B installed at another location. The lower surface of the upper cover a (back surface) is provided with an O for maintaining airtightness with the can body b.
The ring is stuck in an adhesive state, and is transferred to the O-ring removing device B while being supported by the upper lid a.

[Structure of O-ring removing device] The structure of the O-ring removing device B used for the O-ring removing operation will be described below. As shown in FIGS. 4 and 5, the O-ring removing device B includes a support base 50, an elevating mechanism 60 disposed inside the support base 50, and a horizontal position adjusting mechanism supported by the elevating mechanism 60. 70, a scraper head 80 provided at one end of the horizontal position adjustment mechanism 70, and a cleaning means 90 provided at the other end of the horizontal position adjustment mechanism 70;
Monitoring means 1 arranged to be supported by horizontal position adjustment mechanism 70
00.

As shown in FIGS. 4 and 5, the support base 50 includes a can opening device A disposed on the upper side and a temporary placing portion 51 for placing the upper lid a supported thereon. A support table 52 is provided at a lower portion and supports the elevating mechanism 60 and the horizontal position adjusting mechanism 70.

The elevating mechanism 60 includes an elevating motor 61 serving as a rotary drive source, a speed reducing mechanism 62 composed of a combination of gears for reducing the number of rotations of the elevating motor 61, and a speed reducing mechanism. 62 and a lifting table 63 that supports the horizontal position adjusting mechanism 70.

In the horizontal position adjusting mechanism 70, a guide portion 71 arranged on the elevating table 63 for guiding horizontal movement, a horizontal moving bracket 72 supported by the guide portion 71 so as to be horizontally movable, It has a horizontal drive motor 73 mounted on the elevating table 63 and serving as a rotary drive source, and a ball screw 74 connected to the horizontal drive motor 73 for horizontally moving the horizontal moving bracket 72.

The scraper head 80 is attached to the horizontal moving bracket 72 of the horizontal position adjusting mechanism 70 and is mounted on the temporary placing portion 51 of the support base 50 (or is disposed in a suspended state). The O-ring c is peeled off by contacting the O-ring c attached to the lower surface of a.

The cleaning means 90 includes a brush rotation motor 91 attached to the horizontal moving bracket 72 of the horizontal position adjustment mechanism 70 and serving as a rotation drive source, and a cleaning motor attached to the brush rotation motor 91 and rotated. And a brush 92.

The monitoring means 100 is, for example, a fiberscope with a light guide. In this case, an image near the lower surface of the upper lid a is guided to an operation room outside the cell room by an optical fiber 101, The contact state and work state of the scraper head 80 and the cleaning brush 92 are monitored, and the scraper head 80 and the cleaning brush 9 are monitored.
2 has a function as a positioning means for performing positioning and an inspection means for performing inspection.

[Combination of Upper Lid and Can Opener and O-Ring Removing Device] Hereinafter, the O-ring c from the lower surface of the upper lid a
Will be described.

[Positioning Step] The upper cover a separated from the can body b is transferred to a position above the O-ring removing device B by a crane or the like installed in the cell chamber, and temporarily placed on the support base 50. 51 is placed in a state where the side engaging portions 14 of the lower support 13 are engaged.

[O-ring Removal Step] By operating the horizontal position adjusting mechanism 70, the horizontal position of the scraper head 80 is adjusted to a position directly below the O-ring c attached to the upper cover a.
The operation of the elevating mechanism 60 causes the scraper head 80 to contact the O-ring c on the lower surface of the upper cover a. When the turning mechanism 20 in the can opening device A is operated with the scraper head 80 in contact with the O-ring c, the turning table 26
And the upper lid a pivots, and the contact position of the scraper head 80 is relatively shifted, and the O-ring c
Is stripped off.

[O-ring removed surface: Cleaning of upper lid seal surface]
The scraper head 80 is lowered by the operation of the elevating mechanism 60, and instead, by the operation of the horizontal position adjusting mechanism 70,
The horizontal position of the cleaning brush 92 is set directly below the lower surface of the upper lid a, and the cleaning brush 92 is brought into contact with the lower surface of the upper lid a by operating the elevating mechanism 60. By operating the brush rotation motor 91 of the cleaning means 90 and rotating the cleaning brush 92, the lower surface of the upper lid a that is in contact is cleaned.
By shifting the cleaning position based on the operation of the turning mechanism 20 while rotating the cleaning brush 92, the entire lower surface of the upper lid a is cleaned.

[Positioning of Scraper Head and Cleaning Brush and Inspection of Cleaning Surface] On the other hand, the operation of the monitoring means 100 causes the scraper head 80 and the cleaning brush 92 to operate.
The fiber alignment of the fiberscope 10
The first optical fiber guides the operation chamber to the operation room outside the cell chamber, and monitors the contact state and the operation state of the cell chamber scraper head 80 and the cleaning brush 92 to perform positioning. The cleaning status of the underside of
It can be checked by visual inspection.

[Processing of opened solid waste storage can]
The can body b with the upper lid a removed and the upper opening opened is in a state in which the solid waste as the contents can be taken out. Work is performed.

Next, a second embodiment of the method for opening a solid waste storage can and the opening processing facility according to the present invention will be described with reference to FIG.

In FIG. 6, an actuator such as a hydraulic or pneumatic cylinder is applied as a clamp drive source 38 for the gripping mechanism 30, and the solid waste storage is performed based on the reciprocating motion of the clamp drive source 38. The hanging ear d of the upper lid a in the can P is held by the clamp portion 39. Since the parts other than the gripping mechanism 30 are common to the can opening device A of the first embodiment, the description is omitted.

[0041]

According to the method and apparatus for opening a solid waste storage can according to the present invention, the following effects can be obtained. (1) Inserting the insertion part of the turning mechanism into the engaging recess of the solid waste storage can to align the position, and then loosening the fastening bolt with a socket wrench to release the fastening state, the solid waste storage can Can be reliably performed. (2) Contaminants such as seal materials can be reliably removed from the upper lid separated from the can body by operating the O-ring removing device. (3) By disposing the can opening device and the O-ring removing device separately, and passing the top lid between them,
The flexibility of the installation location can be enhanced, and the installation space can be minimized. (4) The can opening device and the O-ring removing device can be individually managed, and the maintainability of the equipment can be improved. (5) By suspending the detached upper lid with the can opening device and engaging it with the O-ring removing device, it is possible to efficiently remove the sealing material by utilizing the turning function of the can opening device. (6) By using the turning function of the can opening device,
The cleaning range of the cleaning means can be expanded, and the equipment can be simplified. (7) By adding monitoring means to the O-ring removing device, alignment, monitoring, and inspection during removal and cleaning operations can be facilitated.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a part of a can opening device in a first embodiment of a method for opening a solid waste storage can and an opening treatment facility according to the present invention.

FIG. 2 is a side sectional view showing a part of a can opening device in a first embodiment of a method for opening a solid waste storage can and an opening treatment facility according to the present invention.

FIG. 3 is a front view showing a hanging state of an upper lid by the can opening device of FIG. 1;

FIG. 4 is a front view showing a part of a can opening device in the first embodiment of the method for opening a solid waste storage can and the opening treatment facility according to the present invention.

FIG. 5 is a side view showing a part of the can opening device in the first embodiment of the method for opening the solid waste storage can and the opening processing equipment according to the present invention.

FIG. 6 is a side sectional view showing a part of a can opening device in a second embodiment of a method for opening a solid waste storage can and an opening treatment facility according to the present invention.

[Explanation of symbols]

 P Solid waste storage can a Top lid b Can body c O-ring d Hanging ear e Engaging recess f Induction taper g Fastening bolt A Can opening device 10 Suspension pedestal 13 Lower support 14 Side engagement 20 Swivel mechanism 21 Lid turning motor 22 Rotating force transmission system 26 Rotating table 27 Insertion unit 30 Gripping mechanism 31 Clamp drive source (opening / closing motor) 32 Rotation force transmission system 35 Clamp unit 37 Clutch 38 Clamp drive source 39 Clamp unit 40 Fastener operating mechanism 41 Bolt drive motor 43 Socket wrench 44 Spline mechanism 45 Elevating means B O-ring removing device 50 Supporting gantry 51 Temporary placing part 60 Elevating mechanism 61 Elevating motor 70 Horizontal position adjusting mechanism 72 Horizontal moving bracket 73 Horizontal driving motor 80 Scraper head 90 Cleaning Means 91 Brush rotation motor 92 Cleaning bra 100 monitoring means

Claims (11)

[Claims] 1. Positioning is performed by lowering an insertion portion (27) of a revolving mechanism (20) supported by a suspension gantry (10) and inserting it into an upper cover (a) engaging recess (e). And a step of engaging the socket wrench (43) with the fastening bolt (g) of the solid waste storage can (P) and loosening the fastening bolt by rotating the socket wrench to release the fastening state. b) separating the container from the solid waste storage can. 2. An upper lid (a) separated from a can body (b).
With the upper part of the O-ring removing device (B);
2. Opening the solid waste storage can according to claim 1, further comprising the step of: bringing the scraper head (80) of the O-ring removing device into contact with the O-ring (c) on the lower surface of the upper lid to peel off the O-ring. Method. 3. The method for unsealing a solid waste storage can according to claim 1, wherein the position of engagement with the fastening bolt (g) is switched by turning the socket wrench (43). 4. The method for opening a solid waste storage can according to claim 2, wherein the scraper head (80) is pivotally moved to shift the stripping position of the O-ring (c). 5. An apparatus for separating an upper lid from a can body (b) by loosening a fastening bolt (g) fastening the upper lid (a), wherein the upper lid is transferred in a suspended state and the solid waste storage can (P) is removed. A) a suspension cradle (10) engaged with the upper part of
A turning mechanism (20) having an insertion portion (27) that is supported by the suspension base and inserted into the engagement recessed portion (e) to perform positioning.
And a fastener operating mechanism (40) for engaging the socket wrench (43) with the fastening bolt and loosening the fastening bolt by rotation of the socket wrench to release the fastening state, and when releasing the fastening of the fastening bolt by the fastener operating mechanism. A facility for opening a solid waste storage can, comprising: a gripping mechanism (30) having a clamp portion (35, 39) for gripping a hanging ear (d) of an upper lid. 6. A swivel mechanism (20) provided on a suspension gantry (10).
Is mounted, and a swivel table (26) is arranged to be able to swivel with respect to the suspension gantry, and a rotational force transmission system is provided between the lid swivel motor (21) and the swivel table. The solid waste storage can opening processing facility according to claim 5, wherein the equipment is connected by (22). 7. The clamping mechanism (35, 39) of the gripping mechanism (30) is arranged at the center of the turning table (26) of the turning mechanism (20). Opening treatment facility for solid waste storage cans. 8. A lower support (13) having a side engaging portion (14) is disposed at a lower position of the suspension base (10), and the side engaging portion is provided with an O-ring removing device (B). Temporary placement part (51)
The solid waste storage can opening facility according to claim 5, 6 or 7, wherein 9. The O-ring removing device (B) includes a horizontal position adjusting mechanism (70) and an O-ring (c) attached to the upper lid (a) supported and suspended by the horizontal position adjusting mechanism. 9. A facility for opening a solid waste storage can according to claim 8, further comprising a scraper head (80) for contacting and stripping the O-ring. 10. A lifting mechanism (6) for adjusting the vertical position of the scraper head (80) is provided on the O-ring removing device (B).
10. The solid waste storage can opening facility according to claim 8, wherein 0) is arranged. 11. A cleaning means (90) having a brush rotation motor (91) for cleaning the lower surface of the upper lid (a) from which the O-ring (c) has been removed is arranged in the horizontal position adjusting mechanism (70). 11. The facility for unsealing solid waste storage cans according to claim 8, 9 or 10.