JPH09184283A - Supporting structure of inspecting scaffold for boiler furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate assembling and dismantling operations for a provisionally erected scaffold and facilitate inspection, etc., of the inside of a furnace hopper. SOLUTION: A supporting structure concerned 21 is composed of a horizontal base frame member 22, vertical column members 23 supported at its four corners, diagonal members 24a, 24b borne at the four corners, and a scaffold 25 laid on the horizontal base frame member 22, and is installed in such a way that one folding support frame body 21a, not illustrated, is formed. The bottoms of vertical columns 23 of other support frame bodies 21b, 21c are engaged by the top of the diagonal member 24a of the support frame body 21a, not illustrated, and the frame bodies 21b, 21c are stacked, and in the same manner, other support frame bodies 21a-21c are installed one after another and assembled. Thus the intended supporting structure 21 is constituted. Because this does not require any assembling and dismantling operations for temporarily erected scaffold, the overall construction term for the inspecting scaffold can be shortened, and it is possible to make inspection of the hopper part at one time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a boiler furnace inspection scaffold such as a boiler installed in a thermal power plant.

[0002]

2. Description of the Related Art In a boiler of this type, a scaffold for inspection inside a furnace is assembled and dismantled for inspection work or remodeling work of the boiler. Inspection scaffolds in the furnace are classified into hanging type and self-supporting type.In each case, it is necessary to install a supporting structure to support the inspection scaffold in the furnace because the scaffold weight is several tens tons. is there. In order to assemble this support structure in the boiler furnace hopper, it is necessary to additionally provide a scaffold for assembling the support structure.

An example of the assembly of the scaffolding of the support structure in the boiler furnace hopper that is generally performed will be described with reference to FIG. The support beam 2 is assembled to the bottom of the boiler furnace 1 as a support structure, and the work floor 3 is laid on it. Inspection scaffolds 5 are sequentially assembled on the work floor 3 using a lifting device 4. 6 is a walkway. Here, when the receiving beam 2 is assembled on the bottom of the boiler furnace 1 and the work floor 3 is laid on it, it is necessary to form a temporary scaffolding on the hopper section 7. Although not shown in the working floor 3, an opening is provided for inserting the material, which has been inserted into the hopper portion 7 to build the inspection scaffold 5 using the lifting device 4, onto the working floor 3. .

FIG. 6 is a diagram showing an example of a temporary scaffold.
As shown in FIG. 6, the hopper portion 7 has a pyramidal shape, and scaffold logs or scaffold pipes 8 and scaffold plates 9 are carried into the hopper portion 7 from the opening at the lower end to sequentially assemble temporary scaffolds. Reference numeral 10 is a water pipe, and 11 is a water drum.

In Japanese Patent Laid-Open No. 63-265069, a coal-fired boiler or the like is hoisted to a predetermined height position in the furnace through an opening in the bottom of the furnace while the telescopic container is contracted and folded. Enclose the fluid in the container, expand and expand the telescopic container, and then put the scaffolding board on the expanded and expanded telescopic container to make a working floor (here, stage) and assemble the scaffold in the furnace. A method for assembling a scaffold for in-reactor inspection is disclosed.

[0006]

However, in the conventional scaffolding for temporary construction of the supporting structure of the furnace hopper section as described above, it takes a considerable period of time to assemble the scaffolding for temporary construction after the construction is completed, and the scaffolding for dismantling the temporary scaffolding after the construction is completed. It also takes a considerable amount of work. Therefore, there is a problem that it greatly affects the overall construction period of the assembling or disassembling work of the inspection scaffold in the boiler furnace. Furthermore, there is a risk that the worker may get caught on the scaffolding log binding line when the worker moves on the temporary scaffolding of the support structure.

On the other hand, in the temporary scaffolding of the support structure disclosed in Japanese Patent Laid-Open No. 63-265069, a telescopic container filled with a fluid is hung by a plurality of lifting metal fittings such as wires hung from the upper part of the furnace. Be held. When the work floor is set on this telescopic container, it shakes and is unstable.

Most of the suspended boilers installed in thermal power plants and the like are of the water pipe type, and in this case, it is necessary to check the inside of the furnace hopper section 7 as well. The temporary scaffolding using the expandable container as described above is unstable, and it is complicated and it is difficult to sufficiently perform inspection and the like.

The present invention is intended to solve the above problems, and eliminates the work of assembling or disassembling a temporary scaffold, and also facilitates the inspection of the inside of the furnace hopper and the like. The purpose is to provide a support structure for an inspection scaffold.

[0010]

According to the present invention, a horizontal base frame member, vertical column members and oblique column members pivotally supported at four corners of the frame member, and scaffolds laid on the frame member are provided in a boiler furnace hopper. One foldable support frame body consisting of members is installed, and the upper ends of the slanting column members of the support frame body are engaged with the lower ends of the vertical column members of the other foldable support frame bodies, so that the other support frame bodies are It is a support structure for a boiler furnace inspection scaffold that is built by stacking and installing other support frame bodies in sequence.

Since the present invention has the above-described structure, the inclination angle of the swash column member is determined according to the inclination in the boiler furnace hopper, and the folding support frame main body is sequentially installed and assembled. The body can be stably installed in the boiler furnace hopper. An inspection scaffold assembled on top of a stable support structure can naturally be installed in a stable manner.

According to the present invention, since the scaffolding member is provided on the folding support frame body, it is not necessary to form a temporary scaffold for installing the support structure. Moreover, the furnace hopper can be inspected by using the scaffolding member of the folding support frame body.
Since the support frame main body used in the present invention has a folding function itself, it can be easily carried in and out of the boiler furnace hopper.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing the whole of the support structure of the present invention assembled in a boiler furnace hopper. Here, the furnace hopper section 7 is shown by a two-dot chain line for the sake of clarity. Reference numeral 21 denotes a support structure, which includes a horizontal base frame member 22, four vertical column members 23 axially supported at the four corners, and four vertical column members 23.
One foldable support frame main body 21a is composed of a slant column member (inner side) 24a pivotally supported in a corner, a slant column member (outer side) 24b, and a scaffold member 25 laid on the horizontal base frame member 22.
Is formed and installed.

The swash column member 24 of the foldable support frame body 21a
a The folding support frame body 2 is formed by engaging the lower end portions of the vertical column members 24 of the other folding support frame bodies 21b and 21c with the upper end portion.
1b and 21c are stacked and installed, and in the same manner, another foldable support frame main body is sequentially installed and assembled, and the support structure 21 is configured as an assembly thereof. A work floor 3 is laid on top of the support structure 21. Normally, a work beam 3 is laid by mounting a receiving beam on the support structure 21. An inspection scaffold is assembled on the work floor 3 by using the lifting device 4 as shown in FIG. 2
Reference numeral 6 is an entrance / exit 26 for carrying in and out materials and the like. A staircase 27 is provided here.

FIG. 2 is a front view of the support structure 21 of the present invention installed in a boiler furnace hopper. In FIG.
The horizontal base frame member 22, four vertical column members 23 pivotally supported at the four corners thereof, and the slant column members 24 pivotally supported at each of the four corners thereof.
a, a foldable support frame body 21a composed of a swash column member 24b and a scaffold member 25 laid on the horizontal base frame member 22.
Two foldable support frame bodies 21b and 21c are installed on the upper part of each of the three foldable support frame bodies 21b and 21c.
d, 21e, 21f are installed, and further four foldable support frame bodies 21g, 21h, 21i, 21j are installed.

A work floor (not shown) is installed on it. A swash column member 24a that constitutes a foldable support frame body,
24b is installed by determining the inclination angle according to the inclination of the boiler furnace hopper 7. Therefore, since it can be fitted exactly to the inner wall of the boiler furnace hopper, a stable support structure 21 can be constructed.

FIG. 3 is a perspective view showing an assembled state of the folding support frame body of the present invention. Folding type support frame body 21
As indicated by thick arrows, four vertical pillar members 23 axially supported at the four corners of the horizontal base frame member 22 and oblique pillar members 24a axially supported at the four corners thereof are opened. , Assembled. Although not shown here, another oblique column member 24b is attached. Here, the reinforcing material 28 is attached. The end of each member is easily fixed by a pin or the like by a shaft support mechanism 29.

FIG. 4 is an enlarged view of the mounting structure of the members of the folding support frame body of the present invention. Here, the mounting structure of the members of the folding support frame main body at the uppermost stage of the support structure adjacent to the boiler furnace hopper wall is shown. Horizontal base frame material 2
The vertical column member 23 pivotally supported at one corner of No. 2 and the oblique column members 24a and 24b pivotally supported at that corner are opened and assembled. The lower ends of the vertical column member 23 and the oblique column members 24a and 24b are easily fixed by a pin 30 or the like by a shaft support mechanism 29.

The vertical column member 23 and the oblique column members 24a and 24b
The upper end portion of the is simply fixed to the receiving beam 2 by the pin 30 or the bolt by the shaft support mechanism 29. The swash column member 24b is installed so as to be inclined according to the inclination in the boiler furnace hopper section 7, and the foldable support frame main body is fixed for stabilization.

As described above, according to the present invention, the support structure for the inspection scaffold can be installed inside the hopper of the boiler furnace without using the temporary scaffold. Therefore, the time for assembling and disassembling for the temporary scaffolding is not required, and the materials thereof are not necessary, and the whole construction period of the inspection scaffolding can be greatly shortened.

Further, each of the supporting frame bodies constituting the supporting structure according to the present invention is a folding type, and it is easy to carry it into the boiler furnace hopper and to carry it out after dismantling. In addition, the support structure according to the present invention can also check the boiler furnace hopper.

[0022]

Since the present invention does not require the work of assembling or disassembling the scaffolding for temporary construction, the whole construction period of the inspection scaffolding can be greatly shortened, and the inspection of the boiler furnace hopper part can be performed at the same time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire assembly of a support structure of the present invention in a boiler furnace hopper.

FIG. 2 is a front view of the support structure of the present invention installed in a boiler furnace hopper.

FIG. 3 is a perspective view showing an assembled state of the folding support frame main body of the present invention.

FIG. 4 is an enlarged view of a mounting structure for a member of the folding support frame body of the present invention.

FIG. 5 is a diagram showing an example of a temporary scaffolding for a conventional boiler furnace hopper section.

FIG. 6 is a diagram showing an example of a conventional temporary scaffold.

[Explanation of symbols]

 21 Support Structures 21a to 21j Folding-type Support Frame Main Body 22 Horizontal Base Frame Material 23 Vertical Column Members 24a, 24b Oblique Column Member 25 Scaffolding Member 26 Doorway 27 Stair 28 Reinforcement 29 Shaft Support 30 Pin 31 Bolt

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideo Tsumaga, 2-4, Kanda Jinbocho, Chiyoda-ku, Tokyo Within Taihei Electric Co., Ltd. (72) Inventor, Yusaku Ando, 2-chome, Kanda Jimbocho, Chiyoda-ku, Tokyo Within the corporation

Claims (1)

[Claims] 1. A foldable type comprising a horizontal base frame member, a vertical column member and an oblique column member pivotally supported at four corners of the frame member, and a scaffold member laid on the frame member in a boiler furnace hopper. Install the support frame main body, engage the upper end of the slanting pillar member of the support frame main body with the lower end of the vertical column member of the other folding type support frame main body, stack the other support frame main bodies, and install them in sequence. Boiler furnace inspection scaffolding support structure constructed by installing and assembling the support frame body of.