JP2004175543A - Rescue device and rescue method of in-cell crane - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rescue device and a rescue method for an in-cell crane capable of remotely hoisting up/hoisting down an electric hoisting accessory of the in-cell crane when the electric hoisting accessory of the in-cell crane cannot be hoisted up/hoisted down due to a failure of the in-cell crane. <P>SOLUTION: The rescue device 1 provided on an in-cell crane installed in a cell comprises a rescue hook 2 to grip a hanger body provided on an electric hoisting accessory of the failed in-cell crane, a chain block 3 to wind up/wind down the rescue hook 2, and a rescue hook guide mechanism 6 to guide the hook so that the wound-down rescue hook 2 is located in a vicinity of a zone from a hoist center Y3 of the rescue hook 2 to a center Y1 of the hanger body, and the rescue hook 2 automatically grips a hanger body and remotely wind the electric hoisting accessory and a load. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rescue device and a rescue method for an in-cell crane, and more particularly, when an in-cell crane breaks down, an electric suspender of an in-cell crane can be hoisted to the height of a crane storage room, and a suspended load can be wound to the cell bottom. The present invention relates to a rescue device and a rescue method for an in-cell crane that can be lowered.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an in-cell crane is installed in a cell that handles radioactive material as an overhead traveling crane that hoists / unloads a suspended load of the radioactive material or the like. This in-cell crane transports a suspended load such as a radioactive substance from a cell bottom to a predetermined position via an electric suspender, and a worker remotely operates the in-cell crane. In addition, since radioactive materials are handled in the cell, this cell is not in an environment where workers can perform work.Therefore, when performing maintenance and repair of the incell crane, one end of the traveling rail on which the incell crane runs This is performed in a crane storage room provided through a shielding door.
[0003]
Here, a motor or a reduction gear, which is a drive source of a hoist drum of an in-cell crane that hoists / unwinds a suspended load, may fail. If a drive source such as the motor or the speed reducer breaks down, the electric suspension of the in-cell crane and the suspended load being carried by the in-cell crane are suspended in the cell. As described above, since the worker cannot repair the in-cell crane in the cell, it is necessary to hoist the electric suspension of the in-cell crane to the height of the crane storage room. In particular, when the drive source fails while the electric suspender is gripping the suspended load, it is necessary to lower the suspended load to the bottom of the process cell.
[0004]
Therefore, in the conventional in-cell crane, a separate drive source is directly or indirectly connected to the rotating shaft of the hoist drum of the in-cell crane, and the electric suspender of the in-cell crane is hoisted to the height of the maintenance cell or suspended. A technique of unwinding a load to the bottom of a process cell has been proposed (for example, Patent Document 1). This is provided with a rescue device (3 in Patent Literature 1) capable of traveling on a traveling rail (1 in Patent Literature 1) separately from the in-cell crane (2 in Patent Literature 1), and a hoisting drum of the in-cell crane. When the drive source (14 in Patent Literature 1) breaks down (7 in Patent Literature 1), the rescue device is moved on the traveling rail to the vicinity of the in-cell crane. Then, the drive shaft coupling device of the rescue device (23 in Patent Literature 1) and the drive shaft coupling device of the in-cell crane (6 in Patent Literature 1) are coupled, and the drive source of the rescue device (24 in Patent Literature 1). Thus, the hoist drum of the in-cell crane is driven. Thereby, even when the drive source of the in-cell crane breaks down, the electric hanging tool of the in-cell crane can be hoisted to the height of the crane storage room, or the suspended load can be lowered to the bottom of the process cell.
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. 1-47544
[0006]
[Problems to be solved by the invention]
By the way, the cause of the failure of the in-cell crane can be considered besides the failure of the drive source of the in-cell crane. For example, the hoisting drum of the in-cell crane may not be able to rotate for some reason. In this case, in the above-mentioned conventional rescue device, the electric suspender of the in-cell crane cannot be hoisted to the height of the crane storage room or the suspended load cannot be lowered to the bottom of the process cell. This is because if the hoisting drum for hoisting / unwinding the electric lifting device of the in-cell crane cannot rotate, even if a driving force is supplied to the hoisting drum from the drive source of the rescue device, the electric lifting device or hoisting load will be hoisted. Because it cannot be rolled down.
[0007]
As a result, there is a problem that the conventional rescue device cannot cope with a failure other than the failure of the driving source of the in-cell crane, for example, a failure of the reduction gear or the hoisting drum. Here, since radioactive materials are handled in the cell, high safety is required for the outside of the cell and for workers. That is, in order to ensure the safety of workers as much as possible, such as a failure that may occur in the equipment installed in the cell, it is necessary to respond by remote control. Therefore, if it is not possible to raise or lower the electric lifting device or suspended load of the in-cell crane, regardless of the cause of the failure, the electric lifting device of the in-cell crane can be moved to the height of the crane storage room by remote control. There is a need for a rescue device that can hoist and unload the suspended load to the bottom of the process cell.
[0008]
Therefore, the present invention has been made in view of the above, and in the case where the electric suspender of the in-cell crane cannot be hoisted or lowered due to the failure of the in-cell crane, the electric suspender and the lifting load are hoisted by remote control, An object of the present invention is to provide a rescue device and a rescue method for an in-cell crane that can be lowered.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, in a rescue device provided in an in-cell crane installed in a cell, a rescue hook for grasping a hanger body provided in an electric suspender of a failed in-cell crane, A chain block for raising and lowering the hook; and a rescue hook guide mechanism for guiding the rescue hook that has been lowered to a position near the center of the hanger body from the suspension center of the rescue hook. And
[0010]
According to the present invention, the rescue hook wound down by the chain block near the center of the hanger body by the rescue hook guide mechanism of the rescue device automatically grasps the hanger body, so that the hanger body is provided by remote control. Electric hoist and hanging load can be hoisted. Thus, the in-cell crane can be moved to the crane storage room, and the in-cell crane can be repaired.
[0011]
In this invention, in the in-cell crane according to the first aspect, when the rescue hook grips the hanger body and the electric hanger is wound up by the rescue hook, the center of the hanger main body moves to the center of the electric hanger. A link mechanism is provided.
[0012]
According to the present invention, when the rescue hook winds up the electric suspender via the hanger body, the center of the hanger body moves to the center of the electric suspender by the link mechanism, so that the electric suspender and the suspended load at the rescue hook can be moved. It can be wound up in a stable state.
[0013]
Further, according to the present invention, in the rescue device for an in-cell crane according to claim 1 or 2, when the rescue chain of the rescue hook is inserted and the rescue hook is lowered, it is wound to a predetermined length. A hook-side sheave hanger is provided, which is connected to a sheave-side sheave hanger provided on a sheave mechanism that is lowered and separable from the electric suspension main body of the electric suspension via a connecting member.
[0014]
According to the present invention, since the electric suspension of the in-cell crane can be separated into the electric suspension main body and the sheave mechanism, the electric suspension is separated into the electric suspension main body and the sheave mechanism, and the suspension is suspended due to the failure of the in-cell crane. The electric suspender main body and the suspended load can be lowered with the rescue hook further below the suspended position, and the sheave-side sheave hanger and the hook-side sheave hanger provided in the sheave mechanism are connected via a connecting member. Because of the connection, the separated sheave mechanism can prevent the falling. Thereby, by the remote control, the suspended load grasped by the electric hanger provided with the hanger body can be placed on the bottom of the cell, and only the in-cell crane can be moved to the crane storage room. Repairs can be made.
[0015]
According to the present invention, in the rescue method for an in-cell crane that has failed in a cell, the rescue hook of a rescue device provided in the in-cell crane is suspended from a suspension center of the rescue hook by a rescue hook guide mechanism. A step of lowering the hanger body provided near the center of the hanger body provided on the crane's electric suspender with a chain block, further lowering the rescue hook, and then hoisting the gripper to grip the hanger body with the rescue hook; A step of hoisting the hanging tool by the rescue hook to the vicinity of the master-slave manipulator provided in the cell at the suspension center of the rescue hook; a step of processing the wire rope for the in-cell crane by the master-slave manipulator; The in-cell crane in the crane storage room Characterized in that it comprises a step of.
[0016]
According to the present invention, the rescue hook wound down by the chain block near the center of the hanger body by the rescue hook guide mechanism of the rescue device automatically grasps the hanger body, so that the hanger body is provided by remote control. Electric hoist and hanging load can be hoisted. Thus, the in-cell crane can be moved to the crane storage room, and the in-cell crane can be repaired.
[0017]
According to the present invention, in the rescue method for an in-cell crane that has failed in a cell, the rescue hook of a rescue device provided in the in-cell crane is suspended from a suspension center of the rescue hook by a rescue hook guide mechanism. A step of lowering the hanger body provided on the crane's electric hanger with a chain block to the vicinity of the center thereof, a step of further lowering the rescue hook, and then hoisting to grip the hanger body with the rescue hook; A step of hoisting the rescue hook to the vicinity of the master-slave manipulator provided in the cell at the suspension center of the rescue hook, and a hook side sheave hanger and a sheave side of the sheave mechanism which are wound down to a predetermined length together with the rescue hook. Connecting the sheave hanger via a connecting member; A step of separating the electric suspender body and the sheave mechanism constituting the suspender, a step of rolling down a suspended load suspended on the electric suspender body by a rescue hook to the bottom of the cell, and placing the suspended load on the bottom of the cell. The step of placing, the step of winding up the electric suspender body to the vicinity of the master-slave manipulator by the rescue hook, the step of processing the wire rope for the in-cell crane by the master-slave manipulator, and the step of loading the crane storage room provided in the cell Storing the in-cell crane.
[0018]
Further, according to the present invention, since the electric suspension of the in-cell crane can be separated into the electric suspension main body and the sheave mechanism, the electric suspension is separated into the electric suspension main body and the sheave mechanism, and the suspension is suspended due to the failure of the in-cell crane. The rescue hook can lower the suspended electric suspender body and the suspended load further below this suspended position, and a connecting member connects the sheave-side sheave hanger and the hook-side sheave hanger provided in the sheave mechanism. Since the connection is made via the sheave mechanism, it is possible to prevent the separated sheave mechanism from falling. Thereby, by the remote control, the suspended load grasped by the electric hanger provided with the hanger body can be placed on the bottom of the cell, and only the in-cell crane can be moved to the crane storage room. Repairs can be made.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited by the embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same. In addition, components in the following embodiments include components that can be easily assumed by those skilled in the art.
[0020]
FIG. 1 is a diagram showing a schematic configuration example of a cell in which a rescue device for an in-cell crane according to the present invention is used. As shown in the figure, a cell 100 in which the rescue device 1 of the in-cell crane 20 is used includes a process cell 102 and a maintenance cell 103 with an in-cell hatch 101 interposed therebetween. The process cell 102 is provided at its bottom 104 with a mounting table 105 on which a suspended load W to be carried by the in-cell crane 20 is mounted. The in-cell hatch 101 shields the process cell 102 and the maintenance cell 103, and includes a plurality of hatches (not shown). By removing a part 101 ′ of the in-cell hatch 101 with the in-cell crane 20, an electric suspender 21 of the in-cell crane 20 described below can be rolled down to the suspended load W.
[0021]
The maintenance cell 103 is provided at a predetermined position with a master-slave manipulator (hereinafter, referred to as “MSM”) 106 that allows an operator to remotely control the cell 100 from outside. Although not shown, the MSM 106 has a mechanical hand at the tip thereof, and is capable of variously controlling the electric suspension 21 of the in-cell crane 20 located in the maintenance cell 103 and the suspended load W wound up by the in-cell crane 20 to the maintenance cell 103. Work can be done. A traveling rail 107 of the in-cell crane 20 is provided above the maintenance cell 103, and the in-cell crane 20 can move in any direction of the arrow A on the traveling rail 107. Further, a crane storage room 109 is provided at an upper end of the maintenance cell 103 via a shielding door 108. The crane storage room 109 can be isolated from the maintenance cell 103 by the above-mentioned shield door 108, so that an environment in which an operator can work inside the crane storage room 109 can be provided. The traveling rail 107 extends to the crane storage room 109, and the in-cell crane 20 can move to the crane storage room 109.
[0022]
Next, the in-cell crane will be described. 2A and 2B are detailed configuration diagrams of the electric suspender of the in-cell crane. FIG. 2A is a front view of the electric suspender, and FIG. 2B is a side view of the electric suspender. The in-cell crane 20 includes at least an electric suspension 21, a traveling vehicle 22, and a hoisting drum 23. As shown in FIG. 1, the in-cell crane 20 is disposed on the traveling rail 107, and can move on the traveling rail 107 in the direction of arrow A by a traveling driving source (not shown). As shown in FIG. 2, the electric suspension 21 includes an electric suspension main body 24 and a sheave mechanism 25. The electric suspender main body 24 includes a chuck 24a for gripping the suspended load W and a pulley case 24b for accommodating a motor for driving the chuck 24a. The power supplied to the motor and the like in the pulley case 24b is supplied from the traveling carriage 22 of the in-cell crane 20 by a power cable (not shown).
[0023]
A pulley case hanger 26 is provided above the pulley case 24b. The pulley case hanger 26 includes a hanger main body 26a which is gripped by a rescue hook 2 of the rescue device 1 described later, and a link mechanism 26b attached to an upper portion of the pulley case hanger 26. The hanger main body 26a has an arch shape with a central portion protruding upward, and both ends thereof are attached to two link mechanisms 26b. Although not shown, the link mechanism 26b is configured by rotatably connecting a plurality of flat plates with pins. Here, the link mechanism 26b is arranged such that the center Y1 of the hanger main body 26a is always a predetermined distance away from the suspension center Y2 of the electric suspension tool 21 of the in-cell crane 20, as shown in FIG. It is urged to be in the position. Further, the link mechanism 26b can rotate only in the direction of arrow B from the state shown in FIG.
[0024]
The sheave mechanism 25 includes two sheaves 25a around which two in-cell crane wire ropes C1 and C2 are wound, and a sheave bearing stand 25b. The sheave 25a is rotatably supported by a sheave bearing stand 25b via a sheave rotation shaft 25c. A suspension lug 25d, which is a sheave hanger described later, is provided above the sheave bearing stand 25b. Here, the electric suspender main body 24 is provided with a sheave by inserting a connection pin 27 into a pin hole (not shown) provided at an upper portion of the pulley-case 24b and a pin hole (not shown) provided at a lower portion of the sheave bearing stand 25b. It is detachably attached to the mechanism 25.
[0025]
Next, the rescue device 1 will be described. FIG. 3 is a detailed configuration diagram of the rescue device according to the present invention. FIG. 3A is a front view of the rescue device, and FIG. 3B is a side view of the rescue device. The rescue device 1 includes at least a rescue hook 2, a chain block 3, a hook-side sheave hanger 4, a hook-side sheave hanger lock mechanism 5, and a rescue hook guide mechanism 6. As shown in FIGS. 1 and 3, the rescue device 1 is attached to a lower part of a traveling vehicle 22 of an in-cell crane 20. Here, the rescue device 1 is provided on the left side with respect to the electric suspension tool 21 of the in-cell crane 20, but may be provided on the right side. In this case, the directions of the rescue device 1 and the electric suspension tool 21 of the in-cell crane 20 are opposite to each other.
[0026]
As shown in the figure, the rescue hook 2 includes a hook body 2a and a hook block 2b. The hook main body 2a is provided with a stopper metal 2c for preventing the hanger main body 26a from coming off the hook main body 2a when the hanger 26a described later is grasped. A sprocket 2d, around which a rescue chain C3 from the chain block 3 described later is wound, is rotatably supported in the hook block 2b.
[0027]
As shown in FIG. 1, the chain block 3 includes a drive sprocket 3a and a rescue drive source 3b including a motor and a speed reducer. A rescue chain C3 is wound around the drive sprocket 3a in advance, and the rescue chain C3 is wound around a sprocket 2d of the rescue hook 2 via two sprockets 3c and 3d. The tip C3 'of the rescue chain C3 is connected to the traveling carriage 22 of the in-cell crane 20, as shown in FIG. The rescue drive source 3b has an axis (not shown) connected to the axis of the drive sprocket 3a. By driving the rescue drive source 3b, the drive sprocket 3a rotates and the rescue chain C3 is wound or wound. The rescue hook 2 is raised or lowered accordingly. Y3 indicates the suspension center of the rescue hook 2.
[0028]
The hook-side sheave hanger 4 is provided with two openings 4a through which the rescue chain C3 can be inserted, and a hook lug 4b is provided at a predetermined location on the outer periphery. The hook-side sheave hanger 4 is provided with a wire fixing member 4c at an upper portion thereof, to which a tip of a wire C4 from a hook-side sheave hanger lock mechanism 5 described later is attached.
[0029]
The hook-side sheave hanger lock mechanism 5 includes a wire winding drum 5a around which the wire C4 is wound and a pulley 5b. The wire take-up drum 5a is fixed to the traveling carriage 22 of the in-cell crane 20, and stops feeding of the wire C4 when the wire C4 is sent out by a predetermined length via the pulley 5b. Here, the predetermined length means that when the hook-side sheave hanger 4 is sent out into the cell 100 together with the rescue hook 2, the MSM 106 provided in the maintenance cell 103 of the cell 100 moves with respect to the hook-side sheave hanger 4. It refers to the length of work that can be performed.
[0030]
The rescue hook guide mechanism 6 is attached below the chain block 3 via a chain bucket 7, and includes a leg 6a, a guide roller 6b, an elastic member 6c, and a guide plate 6d. The two leg portions 6a are rotatably supported on both side surfaces of the chain bucket 7 at their central portions. Two guide rollers 6b are rotatably attached to one end of the leg 6a via a rotation shaft 6e. Here, the two guide rollers 6b are attached to the rotating shaft 6e so that the rescue hook 2 passes through the center. On the other hand, one end of an elastic member 6c such as a coil spring is attached to the other end of the leg 6a. The other end of the elastic member 6c is attached to the chain bucket 7. The elastic member 6c has an elastic force capable of returning the guide roller 6b to the position shown in FIG. 3A even when the leg 6a rotates in any direction shown by the arrow C. The guide plate 6d is attached to the lower part of the two legs 6a, and is for sending the rescue hook 2 smoothly into the cell 100. The chain bucket 7 stores the rescue chain C3.
[0031]
Here, reference numeral 8 denotes a rescue hook storage case, which is attached to the chain bucket 7. The rescue hook storage case 8 is for preventing the rescue hook 2 from interfering with the electric suspender 21 and the in-cell crane wire ropes C1, C2 during normal operation in which the in-cell crane 20 is not out of order. is there. The rescue hook storage case 8 is provided with an opening 8a at the center thereof, which communicates from above to below. This is to prevent interference between the rescue hook storage case 8 and the hook 4b of the hook-side sheave hanger 4.
[0032]
The hoisting drum 23 used for the in-cell crane 20 is installed on the traveling carriage 22 at an upper part thereof. Here, the traveling carriage 22 does not move only in the direction of arrow A, that is, in the left-right direction, as shown in FIG. The hoisting drum 23 is connected to a drive source for an in-cell crane including a motor and a speed reducer, although not shown. Wire ropes C1 and C2 for the in-cell crane are wound on the hoisting drum 23 in advance. The wire ropes C1 and C2 for the in-cell crane are respectively wound around two sheaves 25a of a sheave mechanism 25 of the electric suspension tool 21. I have. The ends of the in-cell crane wire ropes C1 and C2 are connected to the traveling carriage 22 of the in-cell crane 20.
[0033]
Next, a rescue method of the in-cell crane 20 will be described. FIG. 4 shows a state in which the in-cell crane has failed and the electric suspension and the suspended load are suspended in the process cell. As shown in the figure, when the hoisting drum 23 of the in-cell crane 20 or the speed reducer (not shown) breaks down, the electric suspender 21 and the load W are suspended in the process cell 102.
[0034]
First, the step of lowering the rescue hook 2 of the rescue device 1 will be described. 5A and 5B are explanatory views of the operation of lowering the rescue hook from inside the rescue hook storage case. FIG. 5A shows the rescue hook in the rescue hook storage case, and FIG. 5B shows the guide. It is a figure which shows the state in which the rescue hook is rolled down via a mechanism. As shown in FIG. 2A, during normal operation of the in-cell crane 20, the rescue hook 2 is stored in the rescue hook storage case 8. When the electric suspender 21 and the suspended load W of the in-cell crane 20 are suspended in the process cell 102 as shown in FIG. 4, the rescue drive source 3b of the chain block 3 of the rescue device 1 is driven. Then, the drive sprocket 3a is rotated, and the rescue hook 2 and the hook-side sheave hanger 4 are started to be lowered into the cell 100 via the sprockets 3c and 3d, as shown in FIG. At this time, the hook main body 2a of the rescue hook 2 is wound down while being guided by the guide plate 6d and the guide roller 6b of the rescue hook guide mechanism 6. The rescue hook 2 wound down to below the guide roller 6b of the rescue hook guide mechanism 6 is arranged so that the hook body 2a can be located near the center Y1 of the hanger body 26a as shown in FIG. The guide roller 6b is further wound down while guiding the rescue chain C3 and the wire C4.
[0035]
FIG. 6 is a diagram showing a state in which the rescue hook of the rescue device is wound down near the suspended electric suspension and the suspended load. FIG. 7 is a detailed view showing a state in which the rescue hook of the rescue device is wound down near the suspended electric suspender and the suspended load, and FIG. 7A is a front view of the electric suspender and the rescue hook. FIG. 2B is a side view of the electric suspension tool and the rescue hook. As shown in FIG. 6 and FIG. 7, when the rescue hook 2 is hung near the electric suspender 21 and the suspended load W, the hook side that is hung from the rescue hook storage case 8 together with the rescue hook 2. The lowering of the sheave hanger 4 ends near the MSM 106 of the maintenance cell 103. The length of the wire C4 previously wound on the wire winding drum 5a of the hook-side sheave hanger lock mechanism 5 is a length that allows the MSM 106 to work on the hook-side sheave hanger 4. That's why. Since the rescue chain C3 passes through the opening 4a of the hook-side sheave hanger 4 (see FIG. 3), the rescue hook 2 can be continuously wound down near the electric suspender 21 and the suspended load W.
[0036]
Next, a process in which the rescue hook 2 grips the hanger main body 26a of the electric suspender 21 will be described. FIG. 8 is a diagram showing a state in which the hook body of the rescue hook grips the hanger body of the electric suspender, wherein FIG. 8 (a) is a front view of the electric suspender and the rescue hook, and FIG. 8 (b) is an electric suspender. FIG. 4 is a side view of a rescue hook. As shown in FIG. 7, when the rescue hook 2 wound down near the electric suspender 21 and the suspended load W is further wound down in the direction of arrow D, the hook body 2 a of the rescue hook 2 is pulled, although not shown. The case hanger 26 is located below the hanger main body 26a, and is a position where the hook main body 2a can hook the hanger main body 26a. Next, the rescue hook 2 is wound up in the direction of the arrow E as shown in FIG. 8, so that the hook stopper 2c of the hook body 2a is pushed back by the hanger body 26a, and the hanger body 26a is gripped. At this time, as shown in FIG. 7B, even if the rescue hook 2 is shifted from the center Y1 of the hanger main body 26a and grips the hanger main body 26a, the central portion of the hanger main body 26a has an arch shape protruding upward. Therefore, when the rescue hook 2 is wound in the direction of arrow E as shown in FIG. 8, the position where the rescue hook 2 is gripping the hanger body 26a is corrected to the center Y1 of the hanger body 26a. Thus, the electric hook 21 and the suspended load W can be wound up and down in a stable state by the rescue hook 2.
[0037]
FIG. 9 is a view showing a state in which the hanger main body gripped by the rescue hook has moved to the center of the electric suspender. FIG. 9A is a front view of the electric suspender and the rescue hook, and FIG. It is a side view of an electric suspender and a rescue hook. FIG. 10 is a view showing a state in which the rescue hook gripping the hanger main body has been moved to the suspension center of the rescue hook by the rescue hook guide mechanism. When the rescue hook 2 is further wound up in the direction of arrow E as shown in FIG. 9, the pulley case hanger 26 moves from the center Y1 of the hanger body 26a to the center Y4 of the electric suspender 21 by the link mechanism 26b. At this time, the rescue hook 2 receives the load of the electric suspender 21, ie, the electric suspender main body 24 and the sheave mechanism 25, and the rescue hook guide mechanism 6 rotates as shown in FIG. It moves to the suspension center Y3 of the rescue hook 2. That is, the rescue chain C3 abutting on the guide roller 6b receives the load of the electric suspender 21 and the rescue hook 2, and a force acts on the guide roller 6b toward the hanging center Y3 side of the rescue hook 2. . Since this force is greater than the elastic force of the elastic member 6c of the rescue hook guide mechanism 6, the rescue chain C3 becomes the suspension center Y3 of the rescue hook 2 from the position indicated by the two-dot chain line. Rotate to position. When the rescue hook 2 gripping the hanger body 26a is wound up in the direction of arrow E, the wire ropes C1 and C2 for the in-cell crane hang down from the sheave mechanism 25 and rise as shown in FIG. 9B.
[0038]
Next, a description will be given of a step of winding the electric suspension tool 21 near the MSM by the rescue hook 2. FIG. 11 is a diagram illustrating a state in which the rescue hook gripping the hanger body is wound up near the MSM. When the rescue hook 2 is further wound up from the state where the hanger main body 26a is grasped (in the direction of the arrow E in FIG. 9), the electric hook 21 is wound up by the rescue hook 2 to the vicinity of the MSM 106 as shown in FIG.
[0039]
Next, a step of connecting the hook side sheave hanger 4 and the lug 25d, which is the sheave side sheave hanger, via a connection member will be described. 12A and 12B are diagrams showing a state in which the hook-side sheave hanger and the sheave-side sheave hanger are connected via a connecting member. FIG. 12A shows a state in which the connecting member is attached, and FIG. 12B shows a connecting pin. FIG. 5 is a view showing a state in which the electric suspender main body and the sheave mechanism are separated from each other. A hook lug 4b of the hook side sheave hanger 4 rolled down to the vicinity of the MSM 106 by a hook side sheave hanger lock mechanism (not shown); and a sheave side sheave hanger of the sheave mechanism 25 wound up to the vicinity of the MSM 106 by the rescue hook 2. The hanging ear 25d is connected to the hanging ear 25d by a wire C5 as a connecting member when the operator remotely controls the MSM 106. The connection member is not limited to the wire C5, but may be a chain or the like.
[0040]
Next, a step of separating the electric suspender main body 24 and the sheave mechanism 25 will be described. As described above, after the hook-side sheave hanger 4 and the lug 25d, which is the sheave-side sheave hanger, are connected via the wire C5, the connection pin 27 is pulled out by the MSM 106, so that the electric suspender main body 24 and the sheave mechanism 25 Is separated. This causes the sheave mechanism 25 to be suspended by the hook-side sheave hanger 4 via the wire C5, as shown in FIG.
[0041]
Next, the step of unwinding the suspended load W suspended from the electric suspender main body 24 to the bottom 104 of the cell 100 by the rescue hook 2 and the step of transferring the suspended load W to the bottom of the cell 100, that is, the bottom 104 of the process cell 102. The mounting step will be described. FIG. 13 is a diagram illustrating a state where the suspended load is rolled down to the bottom of the process cell. As shown in FIG. 12 (b), the rescue hook 2 is wound down in the direction of arrow F from a state where the electric suspender main body 24 and the sheave mechanism 25 are separated. At this time, since the sheave mechanism 25 is connected to the hook-side sheave hanger 4, the sheave mechanism 25 does not fall down together with the electric suspender main body hook 24, so that the sheave mechanism 25 can be prevented from dropping. As shown in FIG. 13, after the suspended load W is lowered to the mounting table 105 on the bottom 104 of the process cell 102 by the rescue hook, the suspended load W is supplied by supplying power to the motor in the pulley case 24b. It is released from the chuck 24a and is mounted on the mounting table 105.
[0042]
Next, a description will be given of a step of winding the electric suspension tool main body 24 to the vicinity of the MSM 106 by the rescue hook 2 and a step of processing the in-cell crane wire ropes C1 and C2 by the MSM 106. FIG. 14 is a diagram showing a state in which the electric suspension main body with the suspended load placed on the mounting table is wound up to the vicinity of the MSM by the rescue hook. As shown in the figure, after the suspended load W is placed on the placing table 105, the electric suspender main body 24 is wound up by the rescue hook 2 to the vicinity of the MSM 106. Here, processing such as bundling the in-cell crane wire ropes C1 and C2 hanging down from the sheave mechanism 25 with the MSM 106 is performed. This prevents the in-cell crane 20 from being unable to move into the crane storage room 109 of the maintenance cell 103 due to the hanging in-cell crane wire ropes C1 and C2 when the rescue hook 2 is wound up to the rescue device 1. That's why.
[0043]
Next, a process of storing the in-cell crane 20 in the crane storage room 109 provided in the cell 100 will be described. FIG. 15 is a diagram illustrating a state where the in-cell crane is stored in the crane storage room. As shown in FIG. 14, after the processing of the in-cell crane wire ropes C <b> 1 and C <b> 2 is completed, the electric suspension main body 24 is further wound up by the rescue hook 2, and the electric suspension main body 24 is wound up to the height of the crane storage room 109. The in-cell crane 20 with the electric suspender main body 24 wound thereon moves on the traveling rail 107 to the crane storage room 109 by the traveling carriage 22. At this time, after the in-cell crane 20 moves into the crane storage room 109, the shielding door 108 is closed to store the in-cell crane 20 in the crane storage room as shown in FIG. Since the stored in-cell crane 20 does not have the suspended load W which is a radioactive substance, the worker can approach the in-cell crane 20. This allows the worker to repair the failed in-cell crane 20 in a safe environment.
[0044]
As described above, regardless of the cause of the failure of the in-cell crane 20, the suspended electric suspender main body 24 and the suspended load W can be lowered further below the suspended position by the rescue hook 2, so that By the operation, the suspended load W grasped by the electric suspender main body 24 provided with the hanger main body 26a can be placed on the bottom 104 of the process cell 102, and only the in-cell crane 20 can be moved to the crane storage room 109. The in-cell crane 20 can be repaired.
[0045]
In the present embodiment, the rescue device 1 and the rescue method for rescuing a failed in-cell crane while the electric suspender main body 24 is gripping the suspended load W have been described, but the present invention is not limited to this. In addition, the rescue device 1 and the rescue method can be used even in a state where the electric suspender main body 24 does not grip the suspended load W.
[0046]
In the present embodiment, the rescue device 1 rescues the in-cell crane 20 when the suspension center Y3 of the rescue hook 2, the center Y1 of the hanger body 26a, and the suspension center Y2 of the electric suspender 21 are at different positions. Although the method has been described, the present invention is not limited to this, and the suspension center Y3 of the rescue hook 2, the center Y1 of the hanger body 26a, and the suspension center Y2 of the electric suspender 21 may be on the same line. In this case, during the normal operation of the in-cell crane 20, the rescue hook storage case 8 is mounted on the rescue hook storage case 8 so that the electric hook 21 of the in-cell crane and the wire ropes C1, C2 for the in-cell crane do not interfere with the rescue hook 2. Store. The rescue chain C3 is also prevented from interfering with the electric suspension tool 21 and the in-cell crane wire ropes C1 and C2 by the rescue chain guide mechanism.
[0047]
When the in-cell crane 20 breaks down, the rescue hook 2 is sent out into the cell 100 by rotating the drive sprocket 3a of the chain block 3. At this time, the rescue chain C3 is disengaged from the rescue chain guide mechanism, and the rescue hook 2 moves to the suspension center Y3 of the rescue hook 2, but the suspension center Y3 of the rescue hook 2 is connected to the hanger body 26a. Is located on the same line as the center Y1 and the hanging center Y2 of the electric suspender 21, the hook body 2a of the rescue hook 2 can automatically grasp the hanger body 26a as described above. When the rescue hook 2 gripping the hanger main body 26a is wound up, as described above, the suspension center Y3 of the rescue hook 2, the center Y1 of the hanger main body 26a, and the suspension center Y2 of the electric suspender 21 are on the same line. Therefore, the electric hook 21 and the rescue hook 2 receiving the load of the suspended load W move a small amount in the front, rear, left, and right directions, so that the hoist can be stably wound.
[0048]
【The invention's effect】
As described above, according to the first or fourth aspect of the present invention, the rescue hook wound down by the chain block in the vicinity of the center of the hanger body by the rescue hook guide mechanism of the rescue device is automatically moved to the hanger body. Therefore, the electric load provided with the hanger body and the suspended load can be hoisted by remote control. Thus, the in-cell crane can be moved to the crane storage room, and the in-cell crane can be repaired.
[0049]
According to the invention described in claim 2, when the rescue hook winds up the electric suspender via the hanger body, the center of the hanger body moves to the center of the electric suspender by the link mechanism. The electric suspender and the suspended load can be wound up in a stable state.
[0050]
According to the third or fifth aspect of the present invention, since the electric suspension of the in-cell crane can be separated into the electric suspension main body and the sheave mechanism, the electric suspension is separated into the electric suspension main body and the sheave mechanism. Can be lowered by the rescue hook below the suspended position, and the sheave side provided on the sheave mechanism and the hook side. Since the sheave hanger is connected via the connection member, the separated sheave mechanism can be prevented from dropping. With this, the suspended load grasped by the electric hanger provided with the hanger body can be placed on the bottom of the process cell by remote control, and only the in-cell crane can be moved to the crane storage room, and the in-cell crane can be moved. Can be repaired.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration example of a cell in which a rescue device for an in-cell crane according to the present invention is used.
FIGS. 2A and 2B are detailed configuration diagrams of an electric suspender of the in-cell crane; FIG. 2A is a front view of the electric suspender, and FIG. 2B is a side view of the electric suspender.
3 is a detailed configuration diagram of a rescue device according to the present invention, wherein FIG. 3A is a front view of the rescue device, and FIG. 3B is a side view of the rescue device.
FIG. 4 shows a state in which the in-cell crane has failed and the electric suspension tool and the suspended load are suspended in the process cell.
5A and 5B are explanatory diagrams of an operation of lowering the rescue hook from inside the rescue hook storage case, wherein FIG. 5A shows a state in which the rescue hook is in the rescue hook storage case, and FIG. It is a figure which shows the state in which the rescue hook is rolled down via a mechanism.
FIG. 6 is a view showing a state in which a rescue hook of the rescue device is wound down near the suspended electric suspension and the suspended load.
FIG. 7 is a detailed view of a state in which a rescue hook of a rescue device is wound down in the vicinity of a suspended electric suspender and a suspended load, and FIG. 7A is a front view of the electric suspender and a rescue hook; FIG. 2B is a side view of the electric suspension tool and the rescue hook.
FIG. 8 is a view showing a state in which the hook body of the rescue hook grips the hanger body of the electric suspender, wherein FIG. 8A is a front view of the electric suspender and the rescue hook, and FIG. FIG. 4 is a side view of a rescue hook.
FIG. 9 is a view showing a state in which the hanger body grasped by the rescue hook has moved to the center of the electric suspender, FIG. 9A is a front view of the electric suspender and the rescue hook, and FIG. It is a side view of an electric suspender and a rescue hook.
FIG. 10 is a view showing a state in which the rescue hook gripping the hanger body has been moved to the suspension center of the rescue hook by the rescue hook guide mechanism.
FIG. 11 is a diagram showing a state in which a rescue hook gripping the hanger body is wound up near the MSM.
12A and 12B are diagrams showing a state in which a hook-side sheave hanger and a sheave-side sheave hanger are connected via a connecting member, wherein FIG. 12A shows a state in which the connecting member is attached, and FIG. FIG. 5 is a view showing a state in which the electric suspender main body and the sheave mechanism are separated from each other.
FIG. 13 is a diagram showing a state where a suspended load is rolled down on the bottom of a process cell.
FIG. 14 is a diagram showing a state in which the electric suspension main body on which the suspended load is placed on the mounting table is wound up near the MSM by a rescue hook.
FIG. 15 is a diagram showing a state where the in-cell crane is stored in the crane storage room.
[Explanation of symbols]
1 rescue device
2 Hook for rescue
2a Hook body
2b Hook block
2c Stopper fitting
2d sprocket
3 Chain block
3a Drive sprocket
3b Rescue drive source
3c, 3d sprocket
4 Hook side sheave hanger
4a Opening
4b Hanging ears
4c Wire fixing member
5 Sheave hanger lock mechanism on hook side
5a Wire winding drum
5b pulley
6 Hook guide mechanism for rescue
6a leg
6b Guide roller
6c elastic member
6d guide board
7 Chain bucket
8 Hook storage case for rescue
8a Opening
20 Insel crane
21 Electric hanging tool
22 Traveling trolley
23 Hoisting drum
24 Electric Suspension Tool Body
24a chuck
24b pulley case
25 Sheave mechanism
25a sieve
25b sheave bearing stand
25c sheave rotation axis
25d hanging ear
26 Pulley case hanger
26a Hanger body
26b Link mechanism
27 Connection pin
100 cells
101 Insel Hatch
102 process cell
103 maintenance cell
104 bottom
105 Mounting table
106 Master-slave manipulator (MSM)
107 running rail
108 Shield door
109 Crane storage room
C1, C2 Wire rope for in-cell crane
C3 rescue chain
C4 wire
C5 wire
Center of Y1 hanger body 26a
Y2 suspension center of the electric suspension tool 21
Y3 Hanging center of rescue hook 2
The center of Y4 electric hanging tool 21
W suspended load

Claims (5)

In the rescue device provided in the in-cell crane installed in the cell,
A rescue hook that grips a hanger body provided on the electric suspension tool of the failed in-cell crane;
A chain block for raising and lowering the rescue hook,
A rescue hook guide mechanism that guides the lowered rescue hook to be located near the center of the hanger body from the suspension center of the rescue hook,
A rescue device for an in-cell crane, comprising: 2. A link mechanism for moving the center of the hanger body to the center of the electric hanger when the rescue hook grips the hanger body and the electric hanger is wound up by the rescue hook. The rescue device for an in-cell crane according to claim 1. The rescue hook is lowered to a predetermined length in conjunction with the rescue chain being inserted and the rescue hook being unrolled,
3. A hook-side sheave hanger for connecting via a connecting member to a sheave-side sheave hanger provided on a sheave mechanism separable from the electric suspension main body of the electric suspension. In-cell crane rescue equipment. In the rescue method of the in-cell crane that failed in the cell,
The rescue hook of the rescue device provided on the in-cell crane is chain-blocked from the suspension center of the rescue hook by the rescue hook guide mechanism to the vicinity of the center of the hanger body provided on the electric suspender of the in-cell crane suspended in the air. And the process of lowering with
After further lowering the rescue hook, winding it up, gripping the hanger body with the rescue hook,
A step of winding the electric suspender by a rescue hook to a vicinity of a master-slave manipulator provided in a cell at a suspension center of the rescue hook,
A step of processing the in-cell crane wire rope by the master-slave manipulator;
Storing an in-cell crane in a crane storage room provided in the cell,
A rescue method for an in-cell crane, comprising: In the rescue method of the in-cell crane that failed in the cell,
The rescue hook of the rescue device provided on the in-cell crane is chain-blocked from the suspension center of the rescue hook by the rescue hook guide mechanism to the vicinity of the center of the hanger body provided on the electric suspender of the in-cell crane suspended in the air. And the process of lowering with
After further lowering the rescue hook, winding it up, gripping the hanger body with the rescue hook,
A step of winding the electric suspender by a rescue hook to a vicinity of a master-slave manipulator provided in a cell at a suspension center of the rescue hook,
A step of connecting a hook side sheave hanger wound down to a predetermined length together with the rescue hook and a sheave side sheave hanger of the sheave mechanism via a connection member,
A step of separating the electric suspension main body and the sheave mechanism constituting the electric suspension,
By the rescue hook, a step of rolling down a suspended load suspended from the electric suspender body to the bottom of the cell,
Placing the suspended load on the bottom of the cell;
A step of winding up the electric suspender body to a position near the master-slave manipulator by a rescue hook,
A step of processing the in-cell crane wire rope by the master-slave manipulator;
Storing an in-cell crane in a crane storage room provided in the cell,
A rescue method for an in-cell crane, comprising:

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