JP3847520B2 - Building inspection and repair method using mobile scaffold device and mobile scaffold device used in this method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile scaffold device used when inspecting or repairing a building formed in a substantially dome shape, such as a reactor building dome of a nuclear power plant or a spherical gas tank, and a building using this device. It relates to the method of inspection and repair.
[0002]
[Prior art]
As a reactor building dome of a nuclear power plant, a building (substantially dome-shaped building) composed of a cylindrical main body and a hemispherical dome formed on the upper part of the main body is used. There are many. As a size of the reactor building dome formed of such a substantially dome-shaped building, for example, there is one configured so that the radius of the main body portion and the dome portion is 20 to 25 m. In the reactor building dome, the strength and durability of the outer wall are particularly important, and it is required to periodically inspect the outer wall and to repair it promptly if any abnormality is found.
[0003]
In order to perform such inspections, conventionally, a plurality of walkways that circulate around the main body part and the peripheral wall of the dome part are provided at predetermined intervals in the vertical direction, and an operator visually observes the dome while walking along the walkway. The exterior wall was inspected. In addition, when an abnormality was found on the outer wall of the reactor building dome due to such inspections, a fixed scaffold was attached to the corridor for repair.
[0004]
[Problems to be solved by the invention]
By the way, since it is difficult to provide a large number of corridors at short intervals in the vertical direction, for example, in the reactor building dome formed with a radius of 20 to 25 m, the distance between the upper and lower corridors is about 16 m. When an operator walks and inspects a walkway provided with such a relatively wide vertical distance, there is a problem that it is difficult to check a place far from the walkway. In addition, since the fixed scaffolding for repair is attached so as to cover the entire peripheral wall of the dome, not only does it take a lot of time and labor to install and remove the stationary scaffolding, but also a large crane is used for a long time. In many cases, there is a problem that repair work efficiency is low and a great amount of cost is required.
[0005]
The present invention has been made in view of such a problem, and it is possible to reliably and efficiently perform inspection work and repair work on a building formed in a substantially dome shape such as a reactor building dome. An object of the present invention is to provide an inspection / repair method using a mobile scaffold device that can be used, and a mobile scaffold device used in this method.
[0006]
[Means for Solving the Problems]
In order to achieve such an object, a building inspection / repair method according to the present invention is a mobile scaffold device having the above-described configuration, that is, traveling on a traveling rail fixed to a peripheral wall of a building. An extendable telescopic boom is provided on the travel device, and an extendable telescopic arm is attached to the end of the telescopic boom in the extending direction, and work is performed on the end of the extendable arm in the extending direction. A method of inspecting and repairing a building using a mobile scaffold device with a base mounted thereon, in a state where an operator is on the work table, the traveling operation of the traveling device, the telescopic operation of the telescopic boom, and the telescopic arm The work table is moved to an arbitrary position close to the outer wall surface of the dome-shaped building, and the worker who has boarded the work table inspects and repairs the outer wall of the dome-shaped building. Like Going on. This makes it possible to easily perform inspection and repair work on all outer walls of a substantially dome-shaped building.
[0007]
The mobile scaffold device according to the present invention includes a traveling rail, a traveling device, a telescopic boom, a telescopic arm, and a workbench. The traveling rail is fixed to a peripheral wall of a building (for example, the reactor building dome 5 described in the embodiment) formed in a substantially dome shape, and the traveling device runs on the traveling rail along the traveling rail. It is configured to be able to run. An extendable telescopic boom is attached to the traveling device, and an extendable telescopic arm is attached to an end of the extendable boom in the extending direction. And the work table comprised so that a worker can board is attached to the edge part of the extension direction of this expansion-contraction arm.
[0008]
According to the mobile scaffold device thus configured, the telescopic boom can be moved to a desired position on the circumference of the peripheral wall of the dome-shaped building by traveling the traveling device along the traveling rail. it can. When the dome-shaped building is shaped like a reactor building dome, for example, if the telescopic boom is extended upward, the work table is moved to the vicinity of the desired position on the peripheral wall of the dome-shaped building. be able to. In the reactor building dome, the distance to the outer wall increases as the telescopic boom is extended. In such a case, the horizontal arm can be extended so that the interval between the work table and the outer wall can be set to a desired interval. .
[0009]
In the mobile scaffold device according to the present invention, the telescopic boom can be configured to freely move up and down with respect to the traveling device, or the telescopic arm can be operated at least one of the hoisting operation and the horizontal turning operation with respect to the telescopic boom. It is preferable to configure freely. With such a configuration, the moving position of the work table can be finely adjusted, so that the work table can be brought closer to a desired position and the efficiency of inspection and repair work can be improved.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, the reactor building dome 5 to which the mobile scaffold device 1 according to the present invention is attached will be described with reference to FIG. The reactor building dome 5 includes a main body 51 formed in a columnar shape, and a dome 52 formed in a hemispherical shape on the upper portion of the main body 52. A lower walkway 53 is provided in the vicinity of the portion that transitions from the main body 51 to the dome 52, and an upper walkway 54 is provided above the dome 52. Each of the walkways 53 and 54 is provided around the peripheral wall of the reactor building dome 5 so that an operator can walk.
[0011]
The mobile scaffold device 1 is attached to the reactor building dome 5 configured as described above. Hereinafter, the mobile scaffold device 1 will be described with reference to FIGS. 1, 3 and 4. The mobile scaffold device 1 includes a traveling device 10, a power source 20, a boom device 30, and a traveling rail 40. The traveling rail 40 includes an upper horizontal plate 41, a lower horizontal plate 42, a vertical plate 43 that extends in the vertical direction from the front ends of both horizontal plates 41, 42, and an inner side of each plate 41, 42, 43. The reinforcing plate 44 is provided. The traveling rail 40 configured in this manner is attached to the outer wall of the reactor building dome 5 by attaching the base ends of both horizontal plates 41 and 42 above the lower corridor 53. It is fixed around the circumferential wall in a circular manner.
[0012]
The traveling device 10 has a plurality of wheels and is configured to be detachable from the traveling rail 40. When the traveling device 10 is attached to the traveling rail 40, the traveling device 10 can travel along the traveling rail 40 with these wheels. It is configured. The traveling device 10 includes a traveling body base 11 and an elevating member 12 configured to be movable up and down with respect to the traveling body base 11. The traveling body base 11 is provided with four rubber drive wheels 13 whose rotational axes extend in the same direction as the upper horizontal plate 41 (only two on one side are shown in FIG. 3). It is driven to rotate by the hydraulic motor 17 and can be braked by the brake 18. The traveling body base 11 is provided with six iron auxiliary wheels 14 whose rotational axes extend in the same direction as the vertical plate 43 (only three on one side are shown in FIG. 3).
[0013]
The auxiliary wheel 14 includes first auxiliary wheels 14 a and 14 a provided on the upper part of the traveling body base 11, second auxiliary wheels 14 b and 14 b, and third auxiliary wheels 14 c and 14 c provided on the lower part of the traveling body base 11. Become. The first auxiliary wheel 14 a and the second auxiliary wheel 14 b are arranged to face each other at a position having a slightly larger interval than the thickness of the vertical plate 43. An elevating member 12 is attached to the lower part of the traveling body base 11 so as to be movable up and down by an expansion and contraction operation of a hydraulic elevating cylinder 16, and a fourth auxiliary wheel 15 is attached to the lower part of the elevating member 12.
[0014]
Further, the traveling device 10 is provided with a boom mounting portion 19 protruding outward, and a boom device 30 is mounted on the boom mounting portion 19. The boom device 30 includes an extendable boom 31, an extendable arm 32, and a work table 33. The telescopic boom 31 is telescopic (nested) by a plurality of telescopic boom members including a base end boom member 31a, a first intermediate boom member 31b, a second intermediate boom member 31c, and a distal end boom member 31d. An expansion / contraction operation is performed in the vertical direction by an expansion / contraction operation of a hydraulic expansion / contraction cylinder (not shown).
[0015]
A telescopic arm 32 is attached to the tip boom member 31d of the telescopic boom 31 configured as described above. The telescopic arm 32 is telescopically configured by a plurality of telescopic arm members including a base end arm member 32a, an intermediate arm member 32b, and a distal end arm member 32c. Similarly to the telescopic boom 31, the telescopic arm 32 is telescopically operated. The telescopic operation is performed in the horizontal direction. A work table 33 configured to allow an operator to ride is attached to the distal end portion of the distal arm member 32c.
[0016]
A power source 20 is attached to the upper part of the traveling device 10 configured as described above. The power source 20 supplies hydraulic oil to each hydraulic actuator such as a hydraulic telescopic cylinder for performing the telescopic operation of the telescopic boom 31 and the telescopic arm 32 in addition to the hydraulic lifting cylinder 16 and the traveling hydraulic motor 17. A hydraulic pump 21, a pump driving engine 22 for driving the hydraulic pump 21, and a power generator 23 are configured. The hydraulic oil supplied from the hydraulic pump 21 is supplied and discharged by a control valve (not shown) to operate each hydraulic actuator. Such operation control of the control valve is performed by operation of an operating device (not shown) provided on the work table 33. The power generation device 23 includes a power generation engine and a generator, and the generated power is sent to a workbench 33 and used as a power source for an electric tool used by an operator during repair work such as an electric drill. It is done.
[0017]
The traveling device 10 to which the power source 20 and the boom device 30 are attached in this way is attached to the traveling rail 40 using a crane device or the like (not shown). When the traveling device 10 is attached to the traveling rail 40, first, the hydraulic elevating cylinder 16 is extended to move the elevating member 12 downward relative to the traveling body base 11 as shown by a chain line in FIG. . In this state, the drive wheels 13, 13... Are placed on the upper horizontal plate 41, and the traveling body base 11 is held so that the upper end portion of the vertical plate 43 is sandwiched between the first auxiliary wheel 14a and the second auxiliary wheel 14b. Hook on the traveling rail 40. In this state, since the third auxiliary wheel 14c is in contact with the lower end portion outside the vertical plate 43, it is possible to support the force acting in the direction in which the traveling body base 11 is laid down by the load of the boom device 30. Therefore, the state of being hooked on the traveling rail 40 can be maintained.
[0018]
After the traveling body base 11 is hooked in this way, the hydraulic lifting cylinder 16 is contracted to bring the fourth auxiliary wheel 15 into the vertical position opposite to the third auxiliary wheel 14c as shown by the solid line in FIG. The elevating member 12 is raised so as to be positioned inside the lower end portion of the plate 43. In this state, the lifting member 12 is fixed to the traveling body base 11 by using the arm fixing bolt B so that the traveling device 10 does not come off the traveling rail 40. After the traveling device 10 is attached to the traveling rail 40 in this way, an operator who has boarded the work table 33 operates the operation device to control the driving of the traveling hydraulic motor 17 and the braking control of the brake 18. Then, the traveling device 10 is moved to a desired position on the traveling rail 40.
[0019]
Then, after moving the traveling device 10 to a desired position on the circumference of the reactor building dome 5, the telescopic boom 31 is extended by operating the operating device provided on the work table 33 in the same manner. The work table 33 is moved to a desired height. Here, when the work table 33 is to be moved to the upper part of the dome part 52, not only the extension operation of the telescopic boom 31 but also the extension operation of the telescopic arm 32 is performed, so that the work table 33 is moved to the dome part. 52 is moved to a desired position on the outer wall. As is apparent from the drawings, the lifting boom 31 is attached to the traveling device 10 in a state of being slightly inclined toward the center direction of the reactor building dome 5. For this reason, in the boom apparatus 30, since the expansion amount of the expansion-contraction arm 32 when moving to the upper part of the dome part 52 as mentioned above can be shortened, the expansion-contraction arm 32 can be formed compactly.
[0020]
Such movement of the work table 33 is performed by the operator operating the operating device to perform the telescopic operation of the telescopic boom 31 and the telescopic operation of the telescopic arm 32. A measuring device for measuring the distance between the telescopic boom 31 is attached to the workbench 33, and the telescopic operation control of the telescopic arm 32 is automatically performed based on the distance measured by the measuring device. Only the expansion / contraction operation control may be performed. The shape of the dome 52 is stored in the storage device in advance, and the expansion / contraction operation control of the expansion / contraction arm 32 is calculated by calculating the expansion / contraction amount of the expansion / contraction arm 32 corresponding to the expansion / contraction amount of the expansion / contraction boom 31 based on the stored value. It is also possible for the operator to perform only the raising / lowering operation control of the raising / lowering boom 31 by configuring so as to perform automatically.
[0021]
According to the mobile scaffold device 1 configured in this way, it is possible to easily move to a desired position on the outer wall of the dome portion 52, so that it is possible to check a place that was conventionally only visible from a distance. Will be able to do. And when abnormality is discovered by this inspection, the operator who got on the work table 33 uses the hydraulic pressure supplied from the hydraulic pump 21 or the electric power supplied from the power generation device 23 to a hydraulic tool such as a breaker or a drill. Since a power tool can be used, repair work can be performed in a short time and at a low cost.
[0022]
Here, in the mobile scaffold device 1 described above, the power source 20 for running the running device 10 and supplying power to the hydraulic actuator and the electric actuator is integrated with the running device 10 and the running rail 40. It is configured to be movable on the top. For this reason, it is no longer necessary to route the oil supply hose and power cable from the ground or from the walkway to the traveling device 10 and the work table 33, and it is not necessary to attach or detach the oil supply hose or power cable. Accidents can also be prevented.
[0023]
In addition, the traveling rail 40 is fixed to the reactor building dome 5 and the traveling device 10 is configured to sandwich the traveling rail 40 in the installed state from the top, bottom, left, and right directions. However, the traveling device 10 is not detached from the reactor building dome 5, and an operator who has boarded the work table 33 can safely perform repair work or the like. Since the driving device 20 and the boom device 30 are integrally attached to the traveling device 10 and the traveling device 10 is configured to be detachable from the traveling rail 40, inspection work and repair are performed. If the traveling device 10, the drive source 20, and the boom device 30 are removed and stored as a unit when the work is not performed, the traveling device 10 and the like will not be exposed to wind and rain, so that deterioration can be prevented. In addition, when there are a plurality of reactor building domes 5, if the traveling rail 40 is fixed to each reactor building dome, the set of the traveling device 10, the drive source 20, and the boom device 30 can be shared. Therefore, inspection and repair costs for the entire power generation facility can be reduced.
[0024]
In the mobile scaffold device 1 described above, the telescopic boom 31 is fixed to the boom mounting portion 19 at a predetermined inclination angle, and the telescopic arm 32 is fixed to the tip boom member 31d. However, the present invention is not limited to such a configuration. For example, the telescopic boom may be configured to be raised and lowered with respect to the boom mounting portion 19, or the telescopic arm 32 may be configured to be freely raised and lowered with respect to the tip boom member 31d. Further, the telescopic boom 31 is not necessarily configured to extend upward, and may be configured to extend downward. With such a configuration, it is possible to easily inspect and repair the lower part of the spherical gas tank.
[0025]
Further, the mobile scaffold device 1 is configured such that the work table 33 can move to the peripheral wall of the portion 52b between the lower gallery 53 and the upper gallery 54 in the dome portion 52 of the reactor building dome 5. However, since the portion 52a above the upper stairs 54 has a gentle inclination, the operator can climb directly from the upper stairs 54, so there is a need to move the work table 33 to this portion 52a. Because there is no. Therefore, when it is necessary to move the workbench 33 to the upper part of the dome 52, the amount of expansion / contraction of the telescopic boom 31 and the telescopic arm 32 may be increased. In the above embodiment, the case where the substantially dome-shaped building is the reactor building dome has been described. However, the mobile scaffold device according to the present invention includes the reactor building dome and the spherical gas tank. In addition, it can be used for inspection and repair of a substantially cylindrical oil tank or the like, and is not limited to the purpose of inspection and repair of the reactor building dome.
[0026]
【The invention's effect】
As described above, the mobile scaffold device of the present invention is configured such that the traveling device can travel along the traveling rail fixed to the peripheral wall of the dome-shaped building. A telescopic arm is attached, and a work table is attached to the tip of the telescopic arm. With this configuration, the work table can be moved to a desired position on the circumference of the dome-shaped building by traveling the traveling device, and the work table can be moved to the dome by expanding and contracting the telescopic boom. It can be moved to a desired height in the structure. And when the distance between the work table and the outer wall of the dome-shaped building is increased by performing the telescopic operation of the telescopic boom, the distance between the work wall surface and the work table in the dome-shaped building can be extended by extending the telescopic arm. Can be set to an arbitrary interval.
[0027]
In the mobile scaffold device according to the present invention, the telescopic boom can be configured to freely move up and down with respect to the traveling device, or the telescopic arm can be operated at least one of the hoisting operation and the horizontal turning operation with respect to the telescopic boom. It is preferable to configure freely. With such a configuration, the moving position of the work table can be finely adjusted, so that the work table can be brought closer to a desired position and work efficiency can be improved.
[0028]
Further, the building inspection / repair method according to the present invention uses the mobile scaffold device having the above-described configuration, and the traveling operation of the traveling device and the expansion / contraction operation of the telescopic boom are performed in a state where the worker is on the work table. The telescopic arm is extended and retracted, the work table is moved to an arbitrary position close to the outer wall surface of the approximately dome-shaped building, and the worker who is on the work table inspects and repairs the outer wall of the approximately dome-shaped building. Since the work is performed, it is possible to easily inspect and repair all the outer walls of the substantially dome-shaped building.
[Brief description of the drawings]
FIG. 1 is a side view of a mobile scaffold device according to the present invention.
FIG. 2 is a side view showing a state in which the mobile scaffold device is attached to a reactor building dome.
FIG. 3 is a partially enlarged view showing a traveling rail and a traveling device in the mobile scaffold device.
4 is a view taken along arrow IV in FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mobile scaffold device 5 Reactor building dome 10 Traveling device 20 Power source 30 Boom device 31 Telescopic boom 32 Telescopic arm 33 Worktable 40 Rail for traveling

Claims (4)

A traveling rail fixed to the peripheral wall of the building formed in a substantially dome shape, a traveling device capable of traveling on the traveling rail along the traveling rail, and a telescopic device attached to the traveling device and capable of extending and contracting. Telescopic boom, telescopic arm attached to the end of the telescopic boom in the extending direction and telescopically extendable in the horizontal direction, and work configured to allow an operator to ride on the end of the telescopic arm in the extending direction A method for inspecting and repairing the building using a mobile scaffold device comprising a platform,
In a state where an operator is on the work table, the work device is operated on the outer wall surface of the substantially dome-shaped building by performing the travel operation of the traveling device, the telescopic operation of the telescopic boom, and the telescopic operation of the telescopic arm. A method for inspecting and repairing a building, characterized in that the worker moves to an arbitrary adjacent position and inspects and repairs the substantially dome-shaped building by the operator. A traveling rail fixed to the peripheral wall of the building formed in a substantially dome shape;
A traveling device capable of traveling on the traveling rail along the traveling rail;
A telescopic boom attached to the traveling device and telescopic,
A telescopic arm attached to the end of the telescopic boom in the extending direction and telescopically extendable in the horizontal direction;
A mobile scaffold device comprising a work table attached to an end of the telescopic arm in the extending direction and configured to allow an operator to board.   The mobile scaffolding device according to claim 2, wherein the telescopic boom is configured to freely move up and down with respect to the traveling device. The mobile scaffold device according to claim 2 or 3, wherein the telescopic arm is configured to freely operate at least one of a hoisting operation and a horizontal turning operation with respect to the telescopic boom.

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