JPH07305497A - In-furnace scaffolding - Google Patents

Abstract

PURPOSE:To mount an in-furnace scaffolding easily, and to prevent the damage of the inside of a furnace by installing a load bearing material, a diagonal member bearing a central section and a safety bearing material to an umbrella rib-shaped beam in a rockable manner and suspending the central section and folding the beam in a rod shape. CONSTITUTION:Load bearing materials 7b bearing a beam 7a formed at a central section in a manner that the beam 7a can be folded in an umbrella rib shape are set up at both ends of the beam 7a, and diagonal members 7 bearing the central section and a safety bearing material 7d at the central section are mounted a rockable manner respectively with holding pins 8. When the beam 7a is mounted into a furnace, the central section of the beam 7a is hung up by a wire, the beam 7a is folded approximately integrally, and inserted into the furnace, both ends of the beam 7a are suspended by a wire, a framework is opened, the load bearing materials 7b are fast stuck completely to the tilting pipes 6 of the bottom of the furnace, and the beam 7a is adjusted so that load on a stage l is transmitted uniformly. The angles of inclination of the load bearing materials 7b are adjusted by controlling the length of diagonal members 7c by an adjusting device 11. A scaffolding is carried out by hanging up the central section by the wire and folding the beam 7a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold in a boiler furnace applied to a bottom stage of a power generation boiler or the like.

[0002]

2. Description of the Related Art FIG. 5 is an explanatory view of a conventional boiler in-core scaffold used in a furnace bottom stage of a power generation boiler or the like. In the figure, a furnace bottom stage 1 such as a boiler for power generation
The bridge scaffold 4 is assembled in the furnace, installed along the inclined pipe 6 at the bottom of the furnace in the furnace, and installed on it.

[0003]

As described above, in the furnace bottom stage 1 of a power generation boiler or the like, the bridge-like scaffold 4 is assembled in the furnace and installed along the inclined pipe 6 at the furnace bottom, and It is supposed to be installed in. Since the bridge-like scaffold 4 is partially assembled into a beam shape, the number of parts is small. However, when the bridge-like scaffold 4 is attached along the inclined pipe 6 at the bottom of the furnace, the inclination of the bridge-like scaffold 4 and the inclined pipe at the bottom of the furnace are reduced. If there is an angle error between the bridge and the scaffold 6, it is difficult to mount the bridge scaffold 4 so as to uniformly support the load. Further, after assembling and erection, when loading an upper scaffold, work equipment, etc. on the furnace bottom stage 1, the bridge-like scaffold 4 bends and the fulcrum A above the bridge-like scaffold 4 is the furnace bottom part as shown by the dotted line. In the direction away from the inclined pipe 6 and the fulcrum C on the lower side is pressed against the inclined pipe 6 at the bottom of the furnace. The load on the furnace bottom stage 1 is fulcrum A, B, C
Should be equally divided into three equal parts and supported, but since the load is applied only to the fulcrum C, the inclined pipe 6 at the bottom of the furnace
May be damaged.

[0004]

The in-furnace scaffold according to the present invention is intended to solve the above-mentioned problems, and a beam that is foldably formed in a central portion in an umbrella frame shape and stretched in the furnace, and the beam. A load supporting member that is swingably attached to both ends of the load supporting member and that is installed along the inclination of the bottom of the furnace to support both ends of the beam, and is interposed between the load supporting member and the beam so as to be foldable together with the beam. And a member that supports the central portion of the beam.

[0005]

That is, in the in-reactor scaffold according to the present invention, the load supporting members that support both ends of the beam are oscillated at both ends of the beam that is formed to be foldable in the center part in the shape of an umbrella and stretched in the furnace. It is installed along the inclination of the bottom of the furnace, and a member supporting the center of the beam between the load support material and the beam is foldably interposed with the beam, and the main scaffold is carried in and out of the furnace. In this case, the central part of the beam is hoisted with a wire to fold the frame of the main scaffold and shrink it into a rod shape almost integrally, and insert or pull up from the inside of the furnace into the furnace. When installing in the furnace, both ends of the beam will be hung by wires to open the framework of the main scaffold and install along the slope of the bottom of the furnace. In this way it can be installed very easily in the furnace. In addition, a load support material that supports both ends of the beam is swingably attached to both ends of the beam stretched in the furnace, and is installed along the inclination of the furnace bottom, and the beam center is between the load support material and the beam. Since the member supporting the section is interposed, the beam is not bent and the load on the beam is evenly applied to the bottom of the furnace.

[0006]

1 to 4 are explanatory views of a scaffold in a boiler furnace according to an embodiment of the present invention. In the figure, the scaffolding in the boiler furnace according to the present embodiment is used for a furnace bottom stage of a power generation boiler or the like. As shown in FIG. 1, the furnace bottom stage 1 of a power generation boiler or the like is shown in FIG. The boiler inner scaffold of the present boiler is assembled in the furnace, attached along the inclined pipe 6 at the bottom of the furnace, and installed on it. The scaffolding in the boiler core of the present boiler is stretched over the power generation boiler to support the beam 7a for supporting the furnace bottom stage 1, and the load support 7b for supporting the load on the furnace bottom stage 1 installed along the inclined pipe 6 at the furnace bottom. A diagonal member 7c interposed between the beam 7a and the load supporting member 7b to support the beam 7a, and a safety supporting member 7d inserted between the diagonal members 7c to fix the diagonal member 7c to the load supporting member 7b. As shown in FIG. 2, the beam 7a can be folded into a canopy shape at the central portion via a stop pin 8. Further, one end of the diagonal member 7c is connected to the middle portion of the beam 7a by a stopper pin 8, and the other end is connected to a load supporting member 7b along the inclined pipe 6 at the bottom of the furnace via a slidable monorail roller 12. There is. Further, the safety support member 7a can be automatically attached by connecting the central portion thereof with a stop pin 8 so as to be able to be folded and incorporating an adjusting device 11 capable of adjusting the length.

In this way, the scaffold in the boiler of the present boiler is provided so that the length of the diagonal member 7c can be adjusted so that it can be freely installed along any inclination of the inclined pipe 6 at the bottom of the furnace in the power generation boiler. At the same time, the respective members are foldably connected to each other via the stop pins 8, and when the members are inserted into the furnace of the power generation boiler, they are folded by the stop pins 8 of the respective connection parts to form a rod-like substantially integrated body. The center of 7a can be bent, and the connecting portion of the diagonal member 7c connecting the center of the beam 7a and the load supporting member 7b with the load supporting member 7b slides on the load supporting member 7b via the monorail roller 12 and moves. You can do it. With this, the members of the scaffolding frame are connected by the stop pins 8, and at the time of loading and unloading into the furnace, the members such as the beam 7a are folded at the stop pins 8 and contracted together, and the wires 9 are inserted from above the furnace. The scaffolding skeleton can be completed by hoisting at, and after being loaded, it is gradually opened and the retaining pins 8 and the like are set between the respective members. Further, a length adjusting device 11 is provided to the diagonal member 7c and the safety support member 7d so that the position of the retaining pin 8 hole of the diagonal member 7c is adjusted to the actual size and the joining position of the diagonal member 7c by the retaining pin 8 is adjusted. Has been done. Thereby, the load supporting member 7b of the scaffolding stage 1 can be accurately set along the inclination of the inclined pipe 6 at the bottom of the furnace.

When the scaffolding inside the furnace of the boiler is carried into the furnace, as shown in FIG. 3, each member such as the beam 7a is fixed with a pin 8.
It is folded at a portion and contracted into a rod shape substantially integrally, and the wire 9 is hung from above the furnace and inserted into the furnace. Since the main members of the scaffolding frame are substantially integrated, they can be easily opened and assembled in the furnace. That is, when the wire 9 is inserted into the furnace, the wire 9 is fastened to both ends of the beam 7a to form a two-point suspension system, and the wire 9 is suspended by one wire. And
After hanging down to the bottom of the furnace, the middle part of the beam 7a is pulled up with a wire, and the wires 9 at both ends are loosened, whereby the beam 7a becomes a straight line. One end of the diagonal member 7c is connected to a middle portion of the beam 7a by a stopper pin 8, and the other end is slidable on a load supporting member 7b along the inclined pipe 6 at the bottom of the furnace and slidable to a monorail roller 12
The monorail roller 12 automatically moves upward in the load supporting member 7b as the beam 7a becomes straight and the intermediate portion of the beam 7a is pulled up, and the scaffolding frame has a shape shown by a solid line. To the shape indicated by the dotted line, the scaffolding skeleton shown in FIG. 4B is formed.

Here, the monorail roller 12 is fixed to the load supporting member 7b via the stopper metal 10, and the adjusting member 11 is used to adjust the load supporting member 7b along the inclination angle of the inclined pipe 6 at the bottom of the furnace. Adjust the length of. After that, the safety support member 7d is attached between the diagonal members 7c to complete the assembly of the main scaffold that supports the scaffold stage 1. The safety support member 7d is foldably connected to the central portion by a stopper pin 8 and the length can be adjusted from the beginning so that the adjusting device 1
It is automatically installed by incorporating 1 into the safety support member 7d. Similarly, a plurality of beams 7a are set side by side on the bottom of the furnace at intervals, and the separately prepared furnace bottom stage 1 is arranged on the beam 7a, whereby the in-core stage 1 can be assembled quite simply and safely.

The conventional bridge-like scaffold has a small number of parts because it is partially assembled in the shape of a beam. However, when the bridge-like scaffold is attached along the inclined pipe at the bottom of the furnace, the inclination of the bridge-like scaffold side and the furnace bottom If there is an error in the angle between the inclined pipe and the inclined pipe, it is difficult to mount the bridge-like scaffold so as to uniformly support the load. Also, after assembling and erection, when loading an upper scaffold or work equipment on the furnace bottom stage, the bridge-like scaffold bends, and the fulcrum A above the bridge-like scaffold is away from the inclined pipe at the bottom of the furnace. The lower fulcrum C is, on the contrary, pressed against the inclined pipe at the bottom of the furnace. The load on the furnace bottom stage is fulcrum A,
It should be equally divided into three parts by B and C, respectively, but the tilt pipe 6 at the bottom of the furnace may be damaged because the load is applied only to the fulcrum C. On the other hand, in the boiler scaffolding inside the boiler, the adjusting device 11 and the monorail roller 12 are used.
The load supporting member 7b can be easily adjusted so that the load supporting member 7b is completely adhered to the inclined tube 6 at the bottom of the furnace, and the load on the stage 1 is evenly transmitted to and supported by the inclined tube 6 at the bottom of the furnace. The inclined tube 6 will not be damaged. Further, by making the scaffolding frame foldable, it is extremely easy to carry it into the furnace and assemble and install it, and it becomes safe and the number of days required for assemble and install is shortened.

[0011]

Since the scaffolding in the furnace according to the present invention is constructed as described above and can be installed in the furnace extremely easily, the number of days required for the installation can be shortened. Further, since the load on the beam is evenly applied to the bottom of the furnace, the inclined pipe at the bottom of the furnace is not damaged.

[Brief description of drawings]

FIG. 1 (a) is a front view of a scaffold in a boiler furnace according to an embodiment of the present invention, and FIG. 1 (b) is B- in FIG. 1 (a).
FIG.

FIG. 2 is a detailed view of a main part thereof.

FIG. 3 is an explanatory diagram of its operation.

FIG. 4 is also an explanatory view of its operation.

FIG. 5 (a) is a front view of a conventional boiler furnace scaffold,
FIG. 7B is an explanatory diagram of its operation.

[Explanation of symbols]

 1 Furnace Bottom Stage 6 Inclined Tube 7a Beam 7b Load Support Material 7c Oblique Material 7d Safety Support Material 8 Stop Pin 9 Wire 10 Stopper 11 Adjuster 12 Monorail Roller

Claims (1)

[Claims] 1. A beam that is formed in a canopy shape so as to be foldable in the central portion and stretched over the inside of the furnace; and a beam that is swingably attached to both ends of the beam and that is installed along the slope of the bottom of the furnace. An in-reactor scaffold, comprising: a load supporting member that supports both ends, and a member that is foldably interposed with the beam between the load supporting member and the beam and that supports a central portion of the beam.