JPS6120836B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crane equipped with a monitoring device that can reliably and easily handle and position objects, particularly a refueling crane used in nuclear power plants, etc. This invention relates to an invention suitable for application to.

Conventionally, a refueling crane used in a nuclear power plant or the like is usually configured as shown in FIG. In other words, as shown in the figure, the refueling crane 1
is a bridge 2 that runs in the X-axis direction (direction perpendicular to the plane of the paper) in the X, Y, and Z coordinate axes, a trolley 3 that is mounted on the bridge 2 and runs in the Y-axis direction (horizontal direction), and the trolley 3 and attached to the lower end in the Z-axis direction (vertical direction)
The mast 5 includes a lifting means for raising and lowering the mast 5, and a turning drive means for turning the mast around its axis. When handling nuclear fuel 6 with this refueling crane 1, the upper end of the fuel 6 is gripped by the gripping member 4 at the lower end of the mast 5 of the crane 1, and the In addition to the positioning in the direction and the positioning in the Z-axis direction by moving the gripping member 4 up and down, it is necessary to perform the positioning by rotating the gripping member 4 around its axis.

By the way, the conventional refueling crane 1 performs the above-mentioned X, Y, and Z axis directions and mast turning operations, etc.
Generally, the crane is operated while an operator monitors the fuel 6 on the crane. However, since the monitoring work by operators is carried out within the radiation-controlled area within the reactor building, radiation exposure to operators is always an issue from an occupational health perspective.Recently, refueling cranes are operated remotely or Although the aim is to achieve autonomous driving, the reality is that it is still far from the stage of practical application.

Therefore, the above-mentioned conventional refueling crane has the following problems: (i) The fuel monitoring work by the operator is carried out within the radiation controlled area within the reactor building, which poses an occupational health problem.

(ii) Work efficiency for fuel positioning and handling operations that require high precision, as the operator cannot easily monitor the fuel and must operate the crane under extremely difficult and adverse conditions; This results in a long period of reactor outage.

(iii) It is difficult to insert fuel into the reactor, confirm the removal position, and check for defects in fuel (especially spent fuel).

There were drawbacks such as:

In addition, not only the above-mentioned conventional refueling crane, but also conventional cranes that handle long articles while maintaining them in a vertical position, when highly accurate positioning and handling operations are required to place the article at the mounting position. Like the above-mentioned refueling crane, since it relies on direct visual inspection by the operator, it cannot meet the above requirements and has the drawback of extremely poor cargo handling efficiency.

The present invention was proposed for the purpose of solving the above-mentioned drawbacks of the conventional crane, and includes a bridge 11 that travels in a predetermined direction by a drive source, and a bridge 11 that is moved on the bridge 11 by a drive source in the traveling direction of the bridge 11. On the other hand, the trolley 12 traveling in the right angle direction
, a gripper support member 25 which is disposed on the trolley 12 so as to be movable up and down and rotated, and a gripper 26 is attached to the lower end, a winch 34, a sheave 33 and a wire rope 31 which are disposed on the guard mast support frame 27. Lifting means for lifting and lowering the gripper support member 25, etc., and rotation means such as a hydraulic cylinder 30 and rod 30a for rotating the gripper support member 25 around its axis; A monitoring device support member 36 that is arranged to be movable up and down and has a monitoring device 37 attached to its lower end, a rotating means consisting of a drive source 42 for rotating the monitoring device 37, a power transmission mechanism 43, a rotating table 18, etc., and a winch 4.
1. The present invention relates to a crane with a monitoring device characterized in that it is equipped with means for raising and lowering a monitoring device support member 36 consisting of a sheave 40, a wire rope 39, etc.

The present invention will be explained in detail below with reference to actual rotation examples shown in FIGS. 2 and 3. Although the illustrated example shows the case where the present invention is applied to a refueling crane, it goes without saying that the present invention can be applied to cranes that require highly accurate positioning and handling operations of handled articles. Nor.

In FIG. 2, reference numeral 11 denotes a bridge that runs on a running rail 13, and the bridge 11 has a pair of mutually parallel girder members 11a and 11'a each having running wheels 14 driven by a drive source (not shown). Connecting beam member 1 with transverse rails 15 parallel to each other
1b and 11'b are connected. 12
are the connecting beam members 11b and 11'b of the bridge 11.
As shown in FIG. 3, the trolley 12 is a trolley that traverses on the upper traversing rail 15. As shown in FIG. It is equipped with Reference numeral 18 denotes a revolving table rotatably supported by the revolving table support stand 19 (FIG. 3) of the trolley frame 17 via support guide rollers 20 and guide rollers 21;
8 is configured to be rotated by a drive source 42 fixed at a proper position on the trolley frame 17 via a power transmission mechanism 43. and the driving source 42,
A power transmission mechanism rotating table support base 19, support guide rollers 20, guide rollers 21, etc. form a rotating means for the rotating table 18. Reference numeral 22 denotes a cylindrical support mast whose upper part is inserted and fixed into the central hole 18a of the above-mentioned turning table 18 so that its axis coincides with the axis of the turning table 18. , and guide rollers 24 are respectively attached. Reference numeral 23 denotes a cylindrical guide mast that is fitted concentrically into the cylindrical support mast 22 and rotatably via the guide roller 24. The upper end of the guide mast 23 is attached to the trolley frame 17. It loosely penetrates the upper beam 27a of the guide mast support pedestal 27 provided as shown in FIG. A bearing 28 is interposed between the guide mast 23 and the upper beam 27a, and the guide mast 23 is rotatably supported by the upper beam 27a. The guide roller 24, the guide mast 23,
The guide mast support pedestal 27, the bearing 28, and the like form a means for rotating the support mast 22.
Reference numeral 30 denotes a drive means for rotating the guide mast 23 disposed at a proper position 29 on the upper beam 27a, for example, a hydraulic cylinder, and the rod 30a of the hydraulic cylinder 30 is connected to the flange 2 of the guide mast 23.
3a, and as the rod 30a expands and contracts, the guide mast 23 can be rotated around its axis within a predetermined angular range. 2
Reference numeral 5 denotes a gripping tool support member that is movable up and down but not rotatable around the axis and is fitted concentrically into the guide mast 23.
6 is installed. Reference numeral 34 denotes a drive device, for example, a winch, for raising and lowering the gripper support member 25 fixed at a suitable position on the upper beam 27a, and a rope support pedestal connected at one end to the winch 34 and provided on the upper beam 27a. The other end of the wire rope 31, which is stretched around a sheave 33 attached to the wire rope 32, is connected to the upper end of the gripper support member 25,
The gripper support member 25 including the gripper 26 is moved up and down within the guide mast 23 by the operation of the winch 34 . The winch 34, sheave 33, rope 31, etc. form means for lifting and lowering the gripper support member 25. 35 is a bracket 4 near the outside of the support mast 22 and parallel to it.
A guide mast of a cylindrical monitoring device support member 36, which will be described later, is disposed through 4 and 45, and the upper end of the guide mast 35 penetrates the rotating table 18 and is fixed to the table 18. . 36
is a monitoring device support member fitted concentrically into the guide mast 35 so as to be movable up and down but not rotatable around the axis.The support member 36 has a monitoring device 3 at the lower end thereof.
7 is attached, and the support member 36 is moved by a driving source 41 fixed at a proper position on the revolving table 18, for example, by lifting means consisting of a winch, a sheave 40 attached to a rope support frame 38, a wire rope 39, etc. While being guided by a guide mast 35 together with the monitoring device 37, it can be moved up and down on its shaft 37 without rotating.

An actual example of the crane of the present invention is configured as described above, and when inserting fuel into a predetermined position in a nuclear reactor using this crane, first grasp the fuel (not shown). After gripping with the tool 26,
The winch 34 is operated to wind up the wire rope 31 and the gripper support member 25 is attached to the guide mast 23.
The guide mast 23 is raised along the guide mast 23 so that the fuel is contained in the guide mast 23. Then, after the bridge 11 and trolley 12 are properly moved and aligned to a predetermined position, the winch 34 is reeled back to lower the gripper support member 25, and the fuel is lowered to a predetermined position within the core. At this time, in order to confirm the predetermined position and the state of the fuel, the monitoring device 37 is rotated and raised and lowered around the fuel. That is, the rotation operation of the monitoring device 37 is performed by the monitoring device support member 36, which rotates in conjunction with the rotation of the rotation table 18, which rotates the drive source 42 via the power transmission mechanism 43. Further, the operation of raising and lowering the monitoring device 37 is performed by raising and lowering the monitoring device support member 36, which is raised and lowered by the winding or rewinding action of the winch 41. In this case, the guide mast 23 of the gripping tool support member 25 is rotated within a predetermined angle range around its axis by the hydraulic cylinder 30, separately from the rotation of the monitoring device 37. In addition, when the fuel is to be taken out from a predetermined position of the nuclear reactor using this crane, the procedure described above may be performed in reverse.

Since the crane of the present invention has the above-described configuration and operation, according to the present invention, the positioning state and handling state of a handled article that requires highly accurate positioning and handling operations can be constantly monitored. Since it is possible to easily observe any position on the outer periphery of the gripper support member using a monitoring device, it is possible to achieve a practical effect of significantly improving cargo handling efficiency compared to the conventional method.

In addition, when the present invention is applied to a nuclear reactor refueling crane, there is no need for the operator to operate the crane within the radiation controlled area of the reactor building, so there are no occupational health problems. This has the advantage that defects in fuel (particularly spent fuel) can be easily confirmed.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of a conventional refueling crane for nuclear reactors, Figs. 2 and 3 are schematic explanatory diagrams of an example of the present invention, and Fig. 2 is a partially cutaway diagram. FIG. 3 is a plan view taken along the - line in FIG. 2. In Figures 2 and 3, 11: bridge, 12: trolley, 17: trolley frame, 1
8: Rotating table, 19: Rotating table support base,
22: Cylindrical support mast, 23: Guide mast of gripping tool support member 25, 26: Gripping tool, 27: Guide mast support frame, 30: Rotating drive device for guide mast 23, 31, 39: Wire rope, 3
3, 40: Sheave, 34: Lifting drive device for gripper support member 25, 35: Guide mast for support member 36 of monitoring device 37, 41, 42: Drive source.

Claims (1)

[Claims] 1 Bridge 1 that runs in a predetermined direction by a driving source
1, a trolley 12 that runs on the bridge 11 in a direction perpendicular to the running direction of the bridge 11 by a drive source, and a trolley 12 that is arranged to be movable up and down and rotatable on the trolley 12, and a gripping tool 26 is attached to the lower end. The gripper support member 25 and the guard mast support frame 2
Lifting means for raising and lowering the gripping tool support member 25, which consists of a winch 34, a sheave 33, a wire rope 31, etc. arranged at The movable means is disposed so as to be able to rotate and move up and down around the gripper support member 25, and a monitoring device 3 is provided at the lower end.
A monitoring device support member 36 equipped with a monitoring device 7, a rotating means consisting of a drive source 42, a power transmission mechanism 43, a rotating table 18, etc. for rotating the monitoring device 37, and a monitoring device consisting of a winch 41, a sheave 40, a wire rope 39, etc. A crane with a monitoring device characterized by comprising means for raising and lowering a device support member 36.