JPH09287283A - Work scaffold device for coal bunker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the opening of a bunker apex, secure a scaffold on the inner wall side, and use the scaffold in common for the inner and outer walls of the bunker without requiring to assemble the scaffold in the coal bunker. SOLUTION: This work scaffold device is used for the bunker panel welding work of a coal bunker in a thermal power plant. A rail capable of being temporarily installed on the beam at a bunker apex and being separately connected in the longitudinal direction is installed. A carriage 16 capable of being traveled on the rail is provided, and a traverse slide base is fitted on the travel carriage 16 to allow the movement in the direction crossing the traveling direction. An arm 46 expandable/shrinkable in the vertical direction via a lift boom is provided on the swivel base of the traverse slide base, and a lifter having a work scaffold 48 is mounted at the tip of the expansion arm 46. The work scaffold 48 can be lowered from the bunker apex along the bunker panel face, a rail gripper is provided on the expansion arm 46 of the lifter, a separate rail behind the travel carriage 16 is moved and installed in the front, and the work position can be moved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work scaffolding device for a coal bunker, and a scaffolding device suitable for use in bunker panel welding work or work incidental to the work when constructing a coal bunker that constitutes a thermal power generation facility. Regarding

[0002]

2. Description of the Related Art A coal bunker facility of a thermal power plant is a container whose ground height reaches 70 to 80 m and is constructed by arranging a plurality of coal bunker units. To assemble a coal bunker, two bunker panels with pillars on both sides are constructed, two bunker panels without pillars are joined to the bunker panel, and then vertical welding is performed, then the lower cone is jacked up. Then, after the skin is fitted to the upper panel at the horizontal split portion, the horizontal split portion is welded and the inner surface of the bunker is appropriately lined. After the construction, the welded parts will be inspected. In the construction work of such a coal bunker, scaffolds are assembled along the inner and outer wall surfaces of the bunker for welding work, painting, inspection, etc., and the worker uses this scaffold to perform the work.

The conventional scaffold installed for the construction of a call bunker is a structure in which a pedestal and a frame scaffold are combined, and is constructed from the ground. An umbrella-type scaffold is inserted with the umbrella folded from the lower part and internally set. Either a method of assembling a scaffold by opening an umbrella at a position, or a method of suspending a hanging scaffold from above the bunker with a wire to form a scaffold was adopted.

[0004]

However, in the case of a frame scaffold or an umbrella-type scaffold, the assembly and removal work is very complicated, and it takes time and much time to assemble the scaffold reaching a height of several tens of meters above ground. It required manpower and many work machines required for assembly. Especially when several bunkers are installed side by side, the number of assembling and disassembling operations is as many as the number of bunkers, so the number of parts is extremely large, and there is a drawback that a lot of space and working time are required for storage and recovery. . Further, in the case of a suspended scaffold, there is a problem in that the work posture cannot be stabilized because the wire is suspended, and it is difficult to change the work position. Further, in any of the methods, the deck plate on the top of the bunker cannot be attached until after removing the internal scaffolding, resulting in waste of process.

The present invention pays attention to the above-mentioned conventional problems, in particular, it does not require scaffolding inside the bunker, the opening of the top of the bunker can be minimized to secure the scaffold on the inner wall side, and An object of the present invention is to provide a work scaffolding device for a coal bunker that can share scaffolds on the inner and outer walls of the bunker.

[0006]

In order to achieve the above object, a working scaffolding apparatus for a coal bunker according to the present invention is a working scaffolding apparatus used for work such as bunker panel welding of a coal bunker in a thermal power generation facility, A rail that can be temporarily installed on the beam at the top of the bunker and that can be separated and connected in the longitudinal direction is laid, and a carriage that can run on this laid rail is provided. The traverse slide base is equipped with an arm that can extend and contract vertically downward through a hoisting boom on the traverse base, and a lifter equipped with a work scaffold is mounted at the end of this telescopic arm. This lifter enables the work scaffold to move down from the top of the bunker along the surface of the bunker panel, and at the same time, to the telescopic arm of the lifter. Is obtained by a movable working point of the traveling truck behind the separation rail is moved laid forward provided Le jaws.

[0007]

According to the above construction, the construction of the bunker panel with pillars and the setting of the bunker panel without pillars constitute the bunker upper peripheral wall, and the scaffolding device is set in the state where the beam is provided on the top surface of the bunker. For this, a rail may be temporarily installed on the beam, a traveling carriage may be placed on the rail, and a lifter may be installed on a slide base on the carriage. The lifter has a telescopic arm attached to the tip of the boom and a working scaffold at the lower end of the arm, so this scaffold can be lowered along the inside of the bunker from the top surface of the bunker, and along the outer wall surface of the bunker. Can also descend. The extension / contraction of the arm itself can be realized as a telescopic structure, and the extension / contraction amount depends on the number of telescopic steps, but by setting the work range from the top of the bunker to 10 m or more, it is possible to cover the area where work cannot be performed from the ground side. The lifter boom can be swiveled, ensuring a work area along the required panel circumference,
If necessary, the cart may be traversed or rail-traveled. Since the temporarily installed rails can be separated and connected in the longitudinal direction, when the running limit on the top surface of the bunker is reached, the rail behind the dolly is released by disconnecting the temporary fixed connection state and separated from the lower end of the lifter arm. It is possible to move the separation rail to the front of the trolley by the grip provided on the rail and connect the rails for laying. As a result, the carriage can be moved further forward. Even if there are multiple bunkers installed, it is not necessary to lay rails over all the bunkers, and the rails from the rear are always connected to the front in the moving direction to the traveling area that needs to be moved to the next work location. It can be laid and the rails should be prepared at a minimum.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Specific embodiments of a work scaffolding apparatus for a call bunker according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a scaffolding device 10 according to an embodiment arranged on the top surface of a coal bunker 12, and FIG. 2 shows an enlarged perspective view of the scaffolding device. The height of the call bunker 12 to the top surface is about 70 to 80 m.
Although not shown, columns are erected at the four corners of. After forming the bunker upper part into a rectangular shape by setting the two panels with pillars and the two panels without pillars, the vertical divisions of these upper panels are welded, but the scaffolding is set prior to this welding operation. When the scaffolding device 10 according to this embodiment is applied, a bunker beam 14 for deck setting on the top surface of the bunker.
Are properly attached and fixed, and the scaffolding device 10 is set using the bunker beams 14.

The scaffolding device 10 has a structure in which a scaffold lifter is mounted on the upper surface of a traveling carriage 16 that is movably installed on the top surface of a bunker. First, the traveling carriage 16
As shown in FIG. 3 and FIG. 4 in detail, the structure is such that the frame is assembled in a plane H shape, and the parallel traveling legs 1
8 and 18 and a fixed base 20 bridged between the legs 18, 18, and rolling rollers 22 are provided at the lower ends of both ends of each traveling leg 18. On the upper surface of the bunker beam 14, the traveling rail 2 corresponding to the traveling legs 18, 18 is provided.
4, 24 are laid, which are appropriately divided into lengths as will be described later, and are temporarily fixed in a state of being connected to a plurality of bunker beams 14. The traveling rail 24 is made of H-shaped steel, and the upper surface flange portion thereof is used for the roller 2
When 2 rolls, the carriage 16 is moved along the rail 24. A guide claw 25 is provided on the traveling leg 18 in order to prevent wheel removal from the rail 24.
Holds the flange of No. 4.

A transverse slide base 26 is attached to the fixed base 20 of the traveling carriage 16. The traverse slide base 26 is movable along traverse rails 28, 28 laid on the fixed base 20, and thereby allows the traveling carriage 16 to move in a direction orthogonal to the traveling direction. A block nut 30 is provided in the lower center of the slide base 26 for this transverse movement, and a screw rod 32 threadedly penetrates the block nut 30.
Is attached to the fixed base 20 at an intermediate position between the traverse rails 28, 28. Screw rod 32
A rotary handle 34 is provided at one end of the horizontal slide base 26, and the transverse slide base 26 can be moved on the fixed base 20 by rotating the rotary handle 34.

From the above, the traverse slide base 26 is a plane XY within the range defined by the traveling range of the traveling carriage 16 and the traveling range on the traverse rail 28 at the top surface of the bunker.
It is possible to move. In order to fix the traveling carriage 16 at the time of work, fixing jacks (not shown) are provided at both ends of each leg portion 18 so that the carriage 16 does not move at a fixed position on the traveling rail 24.

Next, a scaffold lifter 36 is mounted on the traverse slide base to form a working scaffold.
The scaffold lifter 36 includes a fixed base 38 installed and fixed to the traverse slide base 26, and a swivel base 40 that can be swiveled on the upper surface. A hoisting boom 42 is attached to the swivel base 40, and a hoisting cylinder 44 can drive the hoisting boom 42. A telescopic structure telescopic arm 46 hangs down from the tip of the hoisting boom 42, and the boom tip and the telescopic arm 4 are extended.
The arm vertical holding mechanism 48 provided between the upper end of the arm 6 and the upper end of the arm 6 is attached so that the extension and contraction direction of the arm 46 is vertical. A work scaffold 48 is attached to the lower end of the telescopic arm 46 so as to be horizontally rotatable. The telescopic arm 46 can be lowered vertically downward in multiple stages,
The extension amount is configured to reach 10 m or more. Further, the work scaffold 48 has a handrail 48H around the scaffold plate 48F.
Equipped with a call bunker 1
It is possible to descend along the bunker panel 2 and perform work such as welding on the panel surface.

A gripping tool 50 for the traveling rail 24 is provided on the lower end surface of the telescopic arm 46 to which the work scaffold 48 is attached. The grasping tool 50 is composed of a pair of claws capable of enclosing the flange portion of the rail 24, and is capable of grasping and crimping by a mechanical or electrical mechanism.
Then, the traveling rail 24 is divided into a plurality of divided rails 24A, 24B, 24C so that the traveling area of the traveling carriage 16 can be set by the grip 50, and work is performed within the range of the rail length to which these are connected. I am trying. When changing the working location, the split rail 12A (or 12C) laid behind the moving direction is removed from the bunker beam 14, and the grip 50 provided at the lower end of the arm is operated by operating the scaffold lifter 36 itself. The rail 12A (or 12C) separated by is gripped and connected and laid on the divided rail 12C (or 12A) in the front in the moving direction (arrow A in FIG. 2). This allows the carriage 16 to move on the newly laid traveling rail 24 and change the position of the scaffold lifter 36 to change the area in which the work scaffold 48 can descend.

As shown in FIG. 5, the scaffolding device 10 thus constructed has two scaffolding devices 10 installed for one call bunker 12 and travels along parallel panel surfaces. While making it possible, we are trying to do parallel work. By operating the telescopic arm 46 of the scaffold lifter 36 along the inner surface and the outer surface of the bunker panel at each working position, the working scaffold 4 from the top surface of the coal bunker 12 is operated.
8 can be lowered to a place where work is required. As described above, since the elevating arm 46 provided on the scaffold lifter 36 lowers and extends the work scaffold 48 to a required height position in a state of being suspended from the top surface of the bunker, various works can be performed. Since it is not necessary to construct a fixed scaffolding structure inside and outside the panel, the work area from a high place reaching 70 to 80 m to the work limit height from the ground side can be covered with the scaffolding device of the embodiment, so that the call bunker 12 Work efficiency can be greatly improved.

Further, as shown in FIG. 1, in the embodiment, the traveling rail 24 has three divided rails 24 in the longitudinal direction.
A, 24B, and 24C are connected to each other, and the entire length covers the work range for one call bunker 12, but when moving to the adjacent call bunker 12N, it is performed as follows. The fixed rail 24A located at the rear end of the traveling carriage 16 is released, and the scaffold lifter 3 is released.
This is gripped by the gripping tool 50 provided in 6, and is connected to the tip of the front split rail 24C to newly set the traveling range. As a result, the travel rail 24 has a minimum required length, and the deck building work for the top surface of the call bunker 12 can be performed in parallel. In particular, in order to lower the work scaffold 48 by the lifting arm 46, the scaffold plate 4
The projected area of 8F is the minimum required, and since it is sufficient to form some marginal openings in it, the opening to the deck plate can be small, and the risk of working in high places can be reduced. Has become.

[0017]

As described above, according to the working scaffolding apparatus for a coal bunker according to the present invention, it is a working scaffolding apparatus used for work such as welding a bunker panel of a coal bunker in a thermal power generation facility, and a beam at the top of the bunker. Laying a rail that can be temporarily installed and can be separated and connected in the longitudinal direction,
A carriage that can run on the laid rail is provided, and a traverse slide base is attached to the upper surface of the carriage to enable movement in a direction intersecting with the traveling direction, and the traverse base is undulated on the traverse slide base. While providing a vertically expandable arm via a boom and a lifter equipped with a work scaffold at the end of this expandable arm, the work scaffold can be moved down from the top of the bunker along the bunker panel surface by this lifter. Since a rail gripping tool was provided on the telescopic arm of the lifter to move and lay the separation rail behind the traveling carriage forward so that the work location could be moved, the scaffolding inside the bunker was not required, and the opening of the bunker top was opened. It is possible to secure the scaffolding on the inner wall side to a minimum and also to have the excellent effect that the scaffolding on the inner and outer walls of the bunker can be shared. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an arrangement state of a scaffolding device according to an embodiment.

FIG. 2 is an enlarged perspective view of the device.

FIG. 3 is a plan view and an end view of a traveling carriage portion of the device.

FIG. 4 is a sectional view and a front view of the device.

FIG. 5 is an explanatory diagram of a working state of the device.

[Explanation of symbols]

 10 Scaffolding device 12 Coal bunker 14 Bunker beam 16 Traveling trolley 18 Traveling leg 20 Fixed base 22 Rolling roller 24 Traveling rail 25 Guide claw 26 Traverse slide base 28 Traverse rail 30 Block nut 32 Screw rod 34 Rotation handle 36 Scaffold lifter 38 Fixed base Platform 40 Revolving base 42 Elevating boom 44 Elevating cylinder 46 Telescopic arm 48 Working scaffold 48F Scaffolding board 48H Handrail 50 Grip

Claims (1)

[Claims] 1. A scaffolding device for work, which is used for welding a bunker panel of a coal bunker in a thermal power generation facility, laying a rail that can be temporarily installed on a beam on the top of the bunker and can be separated and connected in the longitudinal direction. A carriage that can run on the laid rail is provided, and a traversing slide base is attached to the upper surface of the traveling carriage to enable movement in a direction intersecting with the traveling direction. While installing an extendable arm vertically downward through the lifter is equipped with a lifter equipped with a work scaffold at the end of the expandable arm, while allowing the work scaffold to move down from the top of the bunker along the bunker panel surface, A rail gripping tool is provided on the telescopic arm of the lifter so that the separation rail behind the traveling carriage can be moved and laid forward so that the work location can be moved. A work scaffolding device for a call bunker that is characterized.