JPH0631822B2 - Cleaning work equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is directed to a plurality of reactor vessels facing a plurality of holes equidistantly provided on an outer peripheral portion of a circular upper lid of the reactor vessel. The present invention relates to a cleaning work device for remotely cleaning the inner peripheral surface of a stud bolt hole.

(Prior Art) A circular upper lid of a reactor vessel is fixed to the reactor vessel by a stud bolt. There are dozens of stud bolt holes provided in the stud bolt and the reactor vessel, and these stud bolts and stud bolt holes are
It is essential to clean the reactor vessel before closing it. In particular, the stud bolt hole is engraved with an internal thread, and the thread surface of this internal thread must be cleaned before closing the reactor vessel.

(Problems to be Solved by the Invention) Conventionally, a manual tool for cleaning by screwing a simple tool radially provided with a brush by the worker himself or rotating the brush is installed in the stud bolt hole. However, this manual tool is very heavy and needs to be moved to the above stud bolt hole positions using a crane. It took a lot of time to clean because it was a business.

In addition, since this long-time cleaning work is performed near the upper lid of the reactor vessel, which has a high radiation dose, there is a danger of being exposed.

The present invention is proposed in view of the above problems, and the object of the present invention is that there is no danger of being exposed to radiation. Further, the inner peripheral surface of the stud bolt hole can be swiftly cleaned without scattering or reattaching the adhered matter after the removal. The cleaning work device can still be made compact. Another point is to provide a cleaning device that can significantly reduce the cleaning time.

(Means for Solving the Problems) In order to achieve the above object, the present invention is directed to a reactor vessel facing a plurality of holes provided at a constant pitch on an outer peripheral portion of a circular upper lid of the reactor vessel. In a cleaning work device for remotely cleaning the inner peripheral surfaces of a plurality of stud bolt holes, a wheeled moving body mounted on the upper lid so as to be movable along the outer peripheral portion thereof, and the wheeled moving body. A movable body support shaft that is provided in the body so that it can be inserted into the hole of the upper lid, and a movable body with wheels that is horizontally expandable and contractable by a stroke corresponding to one pitch of each hole. A telescopic device, a cleaning device provided at the tip of the telescopic device, and a hole in another upper lid that is supported by the cleaning device in parallel with the support shaft for the moving body and is adjacent to the hole, and Provided so that it can be inserted into the stud bolt hole The movable support shaft is inserted into the hole of the upper lid. The movable support shaft is inserted into the hole of the upper lid. A double pipe structure with an outer pipe and an inner pipe inserted in the same hole below the outer pipe, and a scaling member is provided on the outer peripheral surface of the inner pipe.
An elevating drive mechanism for the support shaft for the movable body is provided in the movable body with wheels, and the cleaner shaft is provided with an outer tube inserted into the hole of the upper lid and a rotary drive system inserted into the stud bolt hole. A double pipe structure with an inner pipe including the expansion and contraction fixing member is provided on the outer peripheral surface of the outer pipe, a cleaner is provided at the lower end of the inner pipe, and a lifting drive device for the cleaning machine shaft is provided in the cleaning device. ing.

(Operation) The cleaning work device of the present invention is configured as described above,
At the time of cleaning work, the moving body with wheels is placed on the circular top lid, the support shaft for the moving body is placed above the hole in the lid, and the cleaner shaft is placed above another hole adjacent to the hole. Set, then lower the cleaner shaft, insert the outer tube of the cleaner shaft into the hole of the upper lid, expand the expansion and contraction fixing member provided on the outer surface of the outer tube, and place the cleaner shaft on the upper lid. While fixing, while inserting the inner tube of the cleaner shaft into the stud bolt hole of the reactor vessel, while rotating the inner tube and the cleaner, clean the inner peripheral surface of the stud bolt hole of the reactor vessel, The removed material is sucked into the suction device through the suction hose. Further, in the meantime, the telescopic device is horizontally extended by a stroke corresponding to one pitch of each hole to move the wheeled moving body and the moving body supporting shaft by one pitch and lower the moving body supporting shaft. Then, insert the outer tube of the support shaft for the moving body into another hole of the upper lid and the inner tube into the same hole below the outer tube, and attach the expansion / contraction fixing member provided on the outer peripheral surface of the inner tube. By expanding, the support shaft for the moving body is fixed to the upper lid, then the expansion / contraction fixing member provided on the outer peripheral surface of the outer pipe of the cleaner shaft is contracted, and the entire cleaner shaft is raised to clean the cleaner. It is pulled up above the upper lid, and then the telescopic device is contracted by the above stroke to move the cleaner shaft by one pitch. This means that the entire cleaning work device has moved by one pitch, and the cleaning work is continued after that.

(Embodiment) Next, a cleaning work apparatus of the present invention will be described with reference to an embodiment shown in FIGS. 1, 2, and 3. (11) in FIG. 1 is a circular upper lid of a reactor vessel, and the same upper lid (11). Dozens of holes (15) are formed at a constant pitch in the outer peripheral portion of the.

(16) in FIGS. 1 and 2 are stud bolt holes formed in the reactor vessel, and there are dozens of stud bolt holes (16).
The respective stud bolt holes (16) face the respective holes (15) of the upper lid (11) on the same axis.

(17) is a moving body with wheels mounted on the upper lid (11) so as to be movable along the outer periphery thereof, and (2) is a moving body with wheels (1).
The movable body support shaft (2) is provided in (7) so as to be inserted into the hole (15), and the movable body support shaft (2) is inserted into the hole of the upper lid (11). It has a double pipe structure of an outer pipe and an inner pipe inserted in the same hole below the outer pipe, and the inner and outer pipes are vertically expandable. An expansion / contraction fixing member (grip tube) (4) is provided on the outer peripheral surface of the inner tube, and a lifting drive mechanism for the support shaft (2) for the moving body is provided on the moving body with wheels (17).

(6) is an expansion / contraction device provided in the movable body (17) with wheels so as to be expanded / contracted in the horizontal direction by a stroke corresponding to one pitch of each hole (15).

(18) is a cleaning device provided at the tip of the telescopic device (6), and (1) is the cleaning device (18) for supporting the moving body support shaft.
A cleaner shaft which is supported in parallel with (2) and can be moved up and down so as to be inserted into another hole adjacent to the hole (15). It has a double pipe structure of an outer pipe inserted into the hole (15) of (11) and an inner pipe inserted into the stud bolt hole (16), and is expandable and contractable in the upward direction. The inner tube is rotatable and has a rotary drive system (not shown). An expansion / contraction fixing member (grip tube) (4) is provided on the outer peripheral surface of the outer tube, and a cleaner (brush) (3) is provided at the lower end (tip) of the inner tube, and the cleaner shaft ( The lifting drive mechanism of 1) is provided in the cleaning device (18).

(5) A suction hose that connects the cleaning device (18) to the suction device (vacuum cleaner for remote operation) (8), (9)
Is a control panel, (10) is a monitor camera, (12) is a hose extending to a pressurized air source, (13) is a cable extending to a power source, (1
4) is pendants.

Next, the operation of the cleaning work device shown in FIGS. 1, 2, and 3 will be specifically described.

Place the wheeled vehicle (17) on the upper lid (11) of the reactor vessel, place the support shaft (2) for the vehicle above the hole (15) and the cleaner shaft (1) in the same hole. Each of them is set above another hole (15) adjacent to (15), and then the cleaner shaft (1) is lowered in two steps by an elevating drive mechanism (for example, an air cylinder and a rack and pinion). The outer tube of (1) is the upper lid (11)
The expansion / contraction fixing member (grip tube) (4) provided on the outer surface of the outer tube is expanded by inserting the expansion / contraction fixing member (4) into the hole (15) of the upper lid (11). While fixing the outer pipe of the cleaner shaft (1) to the upper lid (11) by making contact with the inner surface of the cleaner shaft, while rotating the inner pipe of the cleaner shaft (1) and the cleaner (brush) (3) Insert into the stud bolt hole (16) of the reactor vessel, and clean the inner peripheral surface of the stud bolt hole (16) with a cleaner (brush) (3). The removed material at that time is
It is sucked into the suction device (vacuum cleaner) (8) through the suction hose (5).

In the meantime, the telescopic device (6) is extended by a stroke corresponding to one pitch of each hole (15), so that the moving body with wheels (17).
And the support shaft (2) for the moving body is moved from the solid line position in FIG. 2 to the position indicated by the two-dot chain line by one pitch, and when the movement is completed, the outer pipe of the support shaft (2) for the moving body is moved into the hole (15). Insert the inner tube into the hole (15) below the outer tube, expand the expansion / contraction fixing member (grip tube) (4) provided on the outer peripheral surface of the inner tube, and expand / contract the same. The member (4) is brought into contact with the inner surface of the hole (15) to fix the movable body support shaft (2) to the upper lid (11).

Next, the inner pipe of the cleaner shaft (1) and the cleaner (brush) (3) are pulled up, and the inner pipe of the cleaner shaft (1) and the cleaner (brush) (3)
After pulling up, reduce the expansion and contraction fixing member (grip tube) (4) provided on the outer peripheral surface of the outer tube of the cleaner shaft (1), pull up the outer tube, and then move the telescopic device (6) to the above stroke. Only by contracting it horizontally, move the cleaner shaft (1) one pitch. This means that the entire cleaning work device has moved one pitch.

The expansion / contraction device (6) connects the cleaner shaft (1) and the movable body support shaft (2), but the expansion / contraction stroke is set to the circular pitch of the hole (15) and the stud bolt hole (16). By changing the left and right lengths, the movement of the cleaning work device can be adjusted by moving the holes (15) (1
6) It is done along the pitch circle. Further, the suction hose (5) and the control cable (7) are connected to the vacuum cleaner (8) for remote control and the control panel (9), and the entire cleaning work device is remotely controlled.

(Effect of the Invention) The cleaning work device of the present invention is configured as described above,
Workers do not have to work near the upper lid (11) of the reactor vessel, and there is no danger of exposure.

In addition, the cleaner (3) provided at the lower end of the cleaner shaft (1) is rotated to remove deposits adhering to the inner peripheral surfaces of the stud bolt holes (16) of the reactor vessel. Since suction is performed by the suction hose (5), the inner peripheral surface of the stud bolt hole can be swiftly cleaned without scattering or re-adhering the adhered matter after the removal.

Further, the cleaner shaft (1) of the cleaning device (18) has a double pipe structure, and the expansion / contraction fixing member (4) is provided on the outer peripheral surface of the outer pipe inserted into the hole (15) of the upper lid (11). Since the expansion / contraction fixing member (4) is expanded and the cleaner shaft (1) is fixed to the upper lid (11), the cleaner shaft (1) can also be used as the supporting leg of the cleaning work device, and the cleaning work device can be made compact. Can be converted.

Also, during the cleaning work, the cleaning device shaft (1) is fixed to the hole (15) of the upper lid (11) by the expansion / contraction fixing member (4) provided on the outer peripheral surface of the outer pipe of the cleaning device shaft (1) to perform the cleaning work. Receive the rotational reaction force of time. In this state, when the telescopic device (4) is operated to move the wheeled vehicle (17) and the vehicle support shaft (2) one pitch along the outer peripheral portion of the upper lid (11), the cleaning is performed. Axis (1)
Becomes a support leg of the wheeled vehicle (17) and the vehicle support shaft (2), so cleaning work and movement of the wheeled vehicle (17) and vehicle support shaft (2) must be performed at the same time. The cleaning work time can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a cleaning work device of the present invention, FIG. 2 is a side view showing an enlarged main part thereof, and FIG. 3 is a plan view thereof. (1) …… Cleaning device shaft, (2) …… Movable body support shaft, (3) …… Cleaning device, (4) …… Scaling / fixing member, (5) …… Suction hose, (6) …… Telescopic device, (8) …… Suction device, (11) …… Circular upper lid, (15) …… Circular upper lid (11) hole, (16) …… Reactor vessel stud bolt hole, (17) …… Wheeled vehicle, (18) …… Cleaning device.

Continuation of the front page (72) Inventor Yukie Hideshima, 1-1 1-1 Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Nuclear Service Engineering Co., Ltd. (56) Reference JP-A-57-128899 (JP, A) Sho 58-1 (JP, A) Japanese Patent Sho 55-3666 (JP, B1)

Claims (1)

[Claims] 1. An inner peripheral surface of a plurality of stud bolt holes of a reactor vessel, which opposes a plurality of holes provided at a constant pitch on an outer peripheral portion of a circular upper lid of the reactor vessel, is remotely cleaned. In the cleaning work device, a movable body with wheels placed on the upper lid so as to be movable along the outer periphery thereof, and a movable body provided with the movable body with wheels capable of being inserted into the hole of the upper lid, which can be moved up and down. Support shaft for a movable body, an expansion / contraction device provided in the movable body with wheels so as to be extendable / contractible in the horizontal direction by a stroke corresponding to one pitch of each hole, and a cleaning device provided at a tip end of the expansion / contraction device. And a cleaning device which is supported by the cleaning device in a state parallel to the support shaft for the moving body and is capable of moving up and down so as to be inserted into a hole of another upper lid adjacent to the hole and the stud bolt hole. Remove the shaft and the A suction device for sucking an object through a suction hose, and the movable body support shaft is inserted into an outer tube inserted into the hole of the upper lid and into the same hole below the outer tube. In the double pipe structure with the inner pipe, the expansion and contraction fixing member is provided on the outer peripheral surface of the same inner pipe, the elevating drive mechanism of the support shaft for the moving body is provided on the wheeled moving body, and the cleaner shaft is A double pipe structure is formed with an outer pipe inserted into the hole of the upper lid and an inner pipe including a rotary drive system inserted into the stud bolt hole, and the expansion / contraction fixing member is provided on the outer peripheral surface of the outer pipe. A cleaning work device, wherein a cleaning device is provided at a lower end portion of the inner pipe, and a lifting drive device for the cleaning device shaft is provided in the cleaning device.