JP3052999B2 - Work scaffolding equipment for coal bunkers - Google Patents

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 more particularly to a scaffolding device suitable for use in a bunker panel welding operation and an incidental operation when constructing a coal bunker constituting a thermal power generation facility. About.

[0002]

2. Description of the Related Art A coal bunker facility of a thermal power plant is a container having a height of 70 to 80 m above the ground, and is constructed by providing a plurality of coal bunkers alone. The assembling of the coal bunker consists of two bunker panels with pillars on both side edges, two pillarless bunker panels are joined and joined to each other, then vertical welding is performed, and then the lower cone is jacked up Then, after the skin is aligned with the upper panel at the horizontal division, the horizontal division is welded, and the bunker is appropriately lined to the inner surface of the bunker. After the construction, inspection of the welding location is performed. When constructing such a coal bunker, a scaffold is assembled along the inner and outer wall surfaces of the bunker for welding, painting, inspection, and the like, and an operator uses the scaffold to perform work.

A conventional scaffold installed for constructing a coal bunker is constructed by combining a gantry and a framework scaffold from the ground, and an umbrella-shaped scaffold is inserted in a state where an umbrella is folded from a lower portion, and an internal setting is performed. Either a method of assembling a scaffold by spreading an umbrella at a position, or a method of suspending a suspended scaffold by a wire from the upper part of the bunker and using it as a scaffold has been adopted.

[0004]

However, in the case of a framework scaffold or an umbrella-type scaffold, the assembling and removing work is very complicated, and the assembling work of the scaffold reaching a height of several tens of meters above the ground itself requires much time and much time. It required manpower and many working machines required for assembly. In particular, when several bunkers are installed, the number of assembling and removing work is required by the number of bunkers, so the number of parts is extremely large, and there is a disadvantage that a large amount of space and work time are required for storage and collection. . Further, in the case of a suspended scaffold, since the wire is suspended, there is a problem that a stable working posture cannot be obtained, and it is difficult to change a working position. Also, in any of the methods, the deck plate on the top of the bunker cannot be stuck unless the internal scaffold is removed, resulting in a waste of process.

The present invention focuses on the above-mentioned conventional problems, and in particular, does not require a scaffolding inside the bunker, and can secure the scaffold on the inner wall side by minimizing the opening at the top of the bunker. An object of the present invention is to provide a working scaffolding device for a coal bunker, which can share a scaffold on the inner and outer walls of the bunker.

[0006]

In order to achieve the above object, a work scaffolding apparatus for a coal bunker according to the present invention is a work 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, a truck that can travel on the laid rail is provided, and a traverse slide base is attached to the upper surface of the traveling truck and the traveling is performed. The horizontal slide base is provided with an arm that can extend and contract vertically downward through a hoisting boom on the swivel base, and a lifter with a working scaffold is mounted at the end of the telescopic arm. The lifter allows the working scaffold to move down from the top of the bunker along the bunker panel surface, while moving the work platform 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 arrangement, the upper peripheral wall of the bunker is formed by setting the bunker panel with pillars and the bunker panel without pillars, and the scaffolding device is set in a state where beams are provided on the top surface of the bunker. For this, a rail is temporarily provided on the beam, a traveling cart is mounted on the rail, and a lifter is installed on a slide base on the cart. The lifter has a telescopic arm attached to the end of the boom and a work scaffold at the lower end of the arm, so that this scaffold can be lowered from the top of the bunker along the inside of the bunker, and along the bunker outer wall. Can also descend. The arm expansion and contraction can be realized by a telescopic structure of the arm itself, and the amount of expansion and contraction depends on the number of telescopic steps. However, by setting the working range from the top of the bunker to 10 m or more, it is possible to cover an area where work is impossible from the ground side. The lifter's boom can be swiveled, ensuring the necessary working area along the panel periphery,
The trolley may be traversed or run on rails as needed. Since the temporary rails can be separated and connected in the longitudinal direction, when the running limit on the top of the bunker is reached, the rails behind the bogie are released from the temporarily fixed connection state and separated, and the lower end of the arm of the lifter The separation rail can be moved to the front of the bogie by means of the gripping tool provided on the carriage, and the rails can be connected and laid. Thereby, the carriage can be moved further forward. And even when a plurality of bunkers are installed, there is no need to lay rails over all the bunkers, while connecting rails from the rear to the traveling area that needs to be moved to the next work point forward in the moving direction as needed. It can be laid and rails need only be prepared.

[0008]

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

FIG. 1 shows a state in which a scaffolding device 10 according to an embodiment is arranged on the top surface of a coal bunker 12, and FIG. 2 is an enlarged perspective view of the scaffolding device. The height of the coal bunker 12 to the top surface is about 70 to 80 m.
Pillars (not shown) are provided upright at the four corners. After the upper part of the bunker is made rectangular by setting two panels with columns and two panels without columns, the vertical divisions of these upper panels are welded. Prior to this welding work, the scaffold is set. When the scaffolding device 10 according to this embodiment is applied, a bunker beam 14 for deck setting is provided on the bunker top surface.
Are appropriately attached and fixed, and the scaffolding device 10 is set using the bunker beam 14.

The scaffolding device 10 has a configuration in which a scaffold lifter is mounted on the upper surface of a traveling vehicle 16 which is movably mounted on the bunker top surface. First, the traveling cart 16
As shown in detail in FIG. 3 and FIG. 4, the structure is framed in a plane H shape, and the parallel running legs 1
8, and a fixed base 20 spanned between the legs 18, 18. Rolling rollers 22 are provided at the lower ends of both ends of each running leg 18. On the upper surface of the bunker beam 14, the running rail 2 corresponding to the running legs 18, 18 is provided.
4, 24 are laid, which are appropriately divided as described later, and are temporarily fixed while being connected to a plurality of bunker beams 14. The running rail 24 is made of H-shaped steel, and its upper flange portion is
The rolling of 2 causes the carriage 16 to move along the rail 24. Further, a guide claw 25 is provided on the traveling leg 18 to prevent the wheel from coming off the rail 24, and the rail 2
4 to hold the flange.

A traversing slide base 26 is attached to the fixed base 20 of the traveling vehicle 16. The traversing slide base 26 is movable along traversing rails 28 laid on the fixed base 20, thereby enabling the traveling carriage 16 to move in a direction orthogonal to the traveling direction. A block nut 30 is provided at the center lower portion of the slide base 26 for this traversing movement, and a screw rod 32 that is screwed through the nut 30 is provided.
Are attached to the fixed base 20 at an intermediate portion between the traversing rails 28, 28. Screw rod 32
A rotating handle 34 is provided at one end of the, and the traversing slide base 26 can be moved on the fixed base 20 by rotating the rotating handle 34.

For this reason, the traversing slide base 26 has a plane XY within the range defined by the moving range of the traveling vehicle 16 and the moving range on the traversing rail 28 on the top of the bunker.
Movement is allowed. In order to fix the traveling vehicle 16 during operation, fixing jacks (not shown) are provided at both ends of each leg portion 18 so that the vehicle 16 does not move at a fixed position on the traveling rail 24.

Next, a scaffold lifter 36 is mounted on the traversing slide base to constitute a working scaffold.
The scaffold lifter 36 includes a fixed base 38 installed and fixed to the traversing slide base 26, and a turning base 40 that can be turned on its upper surface. An up-and-down boom 42 is attached to the turning base 40, and this can be driven up and down by an up-and-down cylinder 44. A telescopic arm 46 having a telescopic structure is hung at the tip of the up-and-down boom 42, and the boom tip and the telescopic arm 4.
The arm 46 is mounted so that the direction of expansion and contraction of the arm 46 is vertical via an arm vertical holding mechanism 48 provided between the arm 46 and the upper end of the arm 6. A work scaffold 48 is attached to the lower end of the telescopic arm 46 so as to be able to rotate horizontally. The telescopic arm 46 can be lowered vertically downward in multiple stages,
The extension amount is configured to reach 10 m or more. In addition, the work scaffold 48 has handrails 48H around the scaffold plate 48F.
The call bunker 1 with the worker on it
The bunker panel 2 descends along the bunker panel to perform operations such as welding on the panel surface.

A grip 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 grip 50 is constituted by a pair of claws capable of enclosing the flange portion of the rail 24, and can be gripped and pressed 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 gripper 50 by itself, and work is performed within the range of the rail length to which these are connected. And When the work location is changed, the split rail 12A (or 12C) laid behind in the moving direction is removed from the bunker beam 14, and the gripping tool 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 the above is gripped and connected and laid on the divided rail 12C (or 12A) forward 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 where the work scaffold 48 can descend.

As shown in FIG. 5, the scaffolding device 10 constructed as described above is provided with two scaffolding devices 10 for one coal bunker 12 and travels along panel surfaces parallel to each other. While making it possible, parallel work is performed. By operating the telescopic arm 46 of the scaffold lifter 36 along the inner and outer surfaces of the bunker panel at each work position, the work scaffold 4 is
8 can be lowered to the point where work is required. As described above, the work scaffold 48 can be lowered to the required height position in a suspended state from the top of the bunker by performing the downward extension by the raising / lowering arm 46 provided on the scaffold lifter 36, and various works can be performed. It is no longer necessary to construct a fixed scaffold assembly inside and outside the panel, and in particular, the work area from a height reaching 70 to 80 m to the working limit height from the ground side can be covered by the scaffolding device of the embodiment. 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, and the total length covers the working range for one call bunker 12, but when moving to the adjacent call bunker 12N, the following is performed. The fixing of the split rail 24A located at the rear end of the traveling vehicle 16 is released, and the scaffold lifter 3 is released.
6 is gripped by the gripping tool 50 and connected to the tip of the front split rail 24C to set a new travel range. Accordingly, the traveling rail 24 has a minimum necessary length, and the deck construction work on the top surface of the coal bunker 12 can be performed in parallel. In particular, to lower the work scaffold 48 by the lifting arm 46, the scaffold plate 4
Since the projection area of 8F is required to be the minimum and only a small margin opening is required, the opening to the deck plate can be reduced, and the danger of working at a high place can be reduced. Has become.

[0017]

As described above, according to the working scaffolding apparatus for a coal bunker according to the present invention, a working scaffolding apparatus used for work such as bunker panel welding of a coal bunker in a thermal power generation facility, wherein the beam at the top of the bunker is provided. Laying rails that can be temporarily installed and can be connected separately in the longitudinal direction,
A trolley that can travel on the laid rail is provided, and a traverse slide base is attached to the upper surface of the trolley to enable movement in a direction intersecting the traveling direction. While providing an arm that can extend and contract vertically downward through the boom and mounting a lifter with a work scaffold at the end of the telescopic arm, the lifter allows the work scaffold to move down from the top of the bunker along the bunker panel surface, A rail gripper is provided on the extensible arm of the lifter, and a separation rail behind the traveling bogie is moved forward and laid so that the work location can be moved. An excellent effect is obtained that the scaffolding on the inner wall side can be secured to a minimum and that the scaffolding on the inner and outer walls of the bunker can be shared. .

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an arrangement state of a scaffold device according to an embodiment.

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

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Scaffolding device 12 Call bunker 14 Bunker beam 16 Traveling trolley 18 Traveling leg 20 Fixed base 22 Rolling roller 24 Traveling rail 25 Guide claw 26 Traversing slide base 28 Traversing rail 30 Block nut 32 Screw rod 34 Rotating handle 36 Scaffold lifter 38 Fixed base Table 40 Swivel base 42 Undulating boom 44 Undulating cylinder 46 Telescopic arm 48 Work scaffold 48F Scaffold plate 48H Handrail 50 Gripping tool

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04G 3/10

Claims (1)

(57) [Claims] 1. A scaffolding device for work such as bunker panel welding of a coal bunker in a thermal power generation facility, wherein a rail which can be temporarily installed on a beam at the top of the bunker and which can be separated and connected in the longitudinal direction is laid. A trolley that can travel on the laid rail is provided, and a traverse slide base is attached to the upper surface of the trolley to enable movement in a direction intersecting the traveling direction. A vertically movable arm is provided at the tip of the telescopic arm, and a lifter with a work platform is mounted on the distal end of the extendable arm.The lifter allows the work platform to move down from the top of the bunker along the surface of the bunker panel. A rail gripper is provided on the extensible arm of the lifter so that the separation rail behind the traveling carriage can be moved forward and laid, making it possible to move the work location A working scaffolding device for a coal bunker.