JPH06323503A - Assembling method for large size suspension type boiler - Google Patents

Abstract

PURPOSE:To shorten process and decrease works for temporary settings and works at high places by ensuring safety against harmful accidents such as earthquakes or strong winds and so on in a large size suspension type boiler assembling work. CONSTITUTION:In an assembling method setting a boiler supporting frame structure at a ceiling edge section of a steel frame 20 and executing a structure construction by suspending a boiler on the supporting frame, a composition is used wherein a boiler suspending frame structure which is mounted on the ceiling section of the steel frame 20 at a boiler side is divided into an upper part and an under part. With respect to them, the upper part frame structure 38U is mounted on an upper edge section and is fixed and on the other hand, the under part frame structure 38D is assembled on the ground side. From a boiler suspending mechanism set on the upper frame structure 38U, a suspending material is suspended till near portion to the ground, and to this, the under part frame structure 38D assembled on the ground side is connected. And an action making the under part frame structure raise by the boiler suspending mechanism and actions executing in order connection to an upper preceeding block and assembling every block of the boiler on the ground side are repeated and the boiler is assembled and an suspension fixture is executed by connecting and uniting the under part frame structure 38D which is mounted by the boiler to the upper part frame structure 38U.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a boiler, and more particularly to a method for assembling a structure for suspending and supporting a large-sized boiler used in a thermal power plant or the like by a steel frame from the top of a building.

[0002]

2. Description of the Related Art Conventionally, a hanging system has been adopted for a boiler in a thermal power plant and the like, which requires a lot of work at a high place, which is extremely dangerous and inefficient. That is, generally, a building that houses a boiler is assembled by a steel frame, a frame for supporting a boiler load is attached to the top end of the steel frame, and a boiler component is attached to the frame. The frame is mainly composed of large beams and intermediate beams that connect them, and a shelf member called a rattan is constructed on this. Then, many sling rods are attached to the wisteria rack, and boiler parts are connected to the sling rods to suspend and support them. When assembling such a boiler, the boiler parts are assembled downward from the high position of several tens of meters in order toward the lower part of the boiler to the upper frame. Since it was necessary to temporarily construct a scaffold, work efficiency was extremely poor.

Therefore, various construction methods have been proposed in order to improve work efficiency, and for example, an assembly method disclosed in JP-A-60-48404 and JP-A-60-48405 is known. ing. 5 (1) and 5 (2) disclose the assembling method disclosed in JP-A-60-48404, and FIGS. 6 (1)-(2) disclose the assembly method in JP-A-60-48405. It is a schematic diagram explaining an assembling method.
These are explanatory views during assembly.

First, referring to FIG. 5, the yagura-shaped steel frame 1 is sequentially assembled from the lower part, and the boiler suspension frame 2 is integrally fixed to the upper end thereof. Next, the boiler parts are carried into the steel frame 1, a plurality of hoisting devices 3 are fixed on the boiler hanging frame 2, and the boiler parts are placed under this wire 4 that is hung near the ground. Boiler upper block 5 is assembled by attaching to boiler 4. Then, the hoisting device 3 is actuated to hoist the upper block 5 to a predetermined height, and then the upper block 5 is joined under the next block 6 below and assembled. Then, the operation of hoisting the wire 4 by the hoisting device 3 and the operation of assembling the blocks of the boiler one after another near the ground and connecting them with the blocks above the same are repeated, as shown in FIG. 5 (2). , The boiler is assembled. Then, after fixing the upper end of the boiler 7 to the boiler suspension frame 2, the lifting device 3 is removed to complete the assembly work.

In this assembling method, since the hoisting device 3 and the wires 4 are various in number, the operability is poor, and it is necessary to convert the hoisting rod into a regular hoisting rod.
Therefore, as a means for improving this drawback, the above-mentioned Japanese Patent Laid-Open No.
The assembling method disclosed in 0-48405 has been proposed. As shown in FIG. 6, the steel frame 8 is sequentially assembled from the lower part, and the upper end part thereof is connected to the connecting member 8c
Temporarily connect with. Next, a temporary boiler suspension frame 9 composed of a horizontal member and a plurality of legs is integrally fixed to the upper end of the steel frame 8, and a plurality of lifting devices 10 are fixed thereon. Then, the wire 11 is hung from each hoisting device 10 to near the ground, and the regular boiler hoisting device 12 is supported at the lower end thereof. On the other hand, the parts of the boiler are carried into the steel frame 8 and the upper block 13 is assembled from the regular boiler suspension frame 12 by supporting it under a plurality of suspension rods 14 as suspension members. . Then, the lifting device 10 on the temporary frame 9
Is operated to wind up the wire 11 to hang up the upper block 13 to a predetermined height, and then the parts of the next block 15 are assembled below the upper block 13 while being joined to the upper block 13. After that, the operation of hoisting the wire 11 by the hoisting device 10 and the operation of assembling the block of the boiler while connecting the block to the block above it are repeated to complete the assembly of the boiler 16. Therefore, after adjusting the height of the regular boiler suspension frame 12, this is fixed to the pillar 8a of the steel frame 8 and the temporary boiler suspension frame 9 and its lifting equipment 10 and wire 11 are removed. This completes the boiler assembly work.

[0006]

However, in such a conventional boiler assembling method, temporary connecting work of the connecting member 8c and setting work and removal work of the temporary boiler suspension frame 9 are required. That is, since the installation and removal of the connecting member 8c that connects the upper end portion of the steel frame 8 and the installation and removal of the temporary frame 9 are required, it cannot be said that the working process is particularly shortened. Therefore, although it is possible to improve safety against disasters such as earthquakes and strong winds without inserting special reinforcing materials into the steel frame during construction, temporary construction work and work at high places can be reduced, and the process shortening effect is sufficient. That was not the case.

The present invention focuses on the above-mentioned conventional problems and increases the strength of a steel frame during construction without inserting a special reinforcing material to improve the safety against disasters such as earthquakes and strong winds. It is an object of the present invention to provide a method for assembling a large-sized hanging boiler, which can reduce temporary construction work and work in high places and shorten the process.

[0008]

In order to achieve the above object, a method for assembling a large suspension type boiler according to the present invention comprises a boiler supporting frame provided at a top end portion of a steel frame, and the supporting frame having the boiler supporting frame. In the assembly method of suspending and constructing, the boiler suspension frame attached to the top end of the steel frame is divided into upper and lower parts, and the upper frame is attached and fixed to the upper end of the steel frame and installed on the upper frame. From the boiler suspension mechanism, the suspension members are suspended to near the ground, connected to the lower frame for boiler suspension assembled on the ground side, and the operation of raising the lower frame by the boiler suspension mechanism and the boilers on the ground side. After assembling the boiler by repeating the operation of assembling the blocks and the operation of sequentially connecting to the preceding block of the upper part, the lower frame with the boiler assembled is mounted on the lower frame. Is obtained by configured to lower fixed suspended by coupling combined with La hanging upper Frames.

[0009]

According to the above construction, of the regular boiler suspension frame divided on the upper end of the steel frame built on the ground, only the upper part is attached, and a lifting member such as a jack rod is attached from the boiler lifting mechanism provided on the upper frame. It is possible to hang it near the ground and support the boiler hanging lower frame assembled on the ground. The boiler can be assembled by repeating the operation of raising the lower frame by the boiler lifting mechanism and the operation of assembling each block of the boiler near the ground and connecting to the lower frame and sequentially connecting to the preceding upper block. And finally,
The assembled boiler is suspended and fixed by connecting the boiler suspension upper frame and lower section. With this method, work efficiency and safety can be improved by reducing temporary work and work in high places, and the process can be shortened by starting early assembly of the boiler suspension lower frame and reducing temporary work removal work. In addition, the load during assembly is smaller than the load during boiler operation, and it can withstand even the normal boiler suspension frame is divided. The method of assembling a large-sized hanging boiler with improved safety can be achieved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of a method for assembling a large-sized hanging boiler according to the present invention will be described below in detail with reference to the drawings.

1 to 4 are explanatory views of an assembling work by an assembling method of a large-sized hanging type boiler according to an embodiment. The boiler assembly work process according to the embodiment is roughly divided into a method of constructing a steel frame that serves as a boiler housing building, and a process of assembling an upper frame among the frame elements in which the boiler supporting frame is vertically divided. The lower frame is connected to the upper frame by a hoisting device, the boiler building block is assembled to the lower frame, and the upper frame is sequentially moved upward, and the finally divided frame upper and lower are connected to each other.

First, at the same time as or concurrently with the assembling work (not shown) of the steel frame on the bunker room side, the steel frame 20 on the boiler room side is constructed sequentially from the lowermost first section upward. . This is as shown in FIG.
This is done by sequentially assembling the yagura-shaped steel frame frame 20 composed of a plurality of columns 22 and a truss 24 connecting these columns from the bottom for each joint, and carrying in and lifting the frame material by using a truck crane or a crawler crane. It is carried out by connecting them to each other. The boiler chamber side steel frame 20 is assembled up to Section 6 in the illustrated example. And the assembled steel frame 20
A frame 26 for suspending and supporting the boiler is attached to the top end of the.

Here, as shown in FIG. 4, the suspension supporting frame 26 to be attached to the upper end portion of the steel frame 20 is composed of a plurality of (only one is shown in the figure) girders 28 serving as load supporting bodies. A so-called rattan rack is constructed by having an intermediate beam 30 connecting these large beams 28 and fixing an auxiliary beam 32 attached to the upper surface side of the intermediate beam 30 so as to form a lattice shape. The rattan is arranged and set on the lower side of the girder 28, and a sling rod 34 for supporting the boiler is attached to the rattan to extend downward, and a boiler component is suspended and connected to the sling rod to support the boiler. Has become. In the structure of such a frame 26, according to the present invention, the girder 28 is provided with a flange coupling portion 36 at an intermediate portion in the height direction, and this portion can be vertically separated. That is, the frame 26 can be separated into an upper frame 38U and a lower frame 38D by releasing the coupling of the flange coupling portion 36. Therefore, the upper frame 38U is composed of a girder member, and the lower frame 38D is composed of a girder member and rattan and sling rods 34 attached thereto.

In such a construction of the frame 26, the frame 26 which serves as a ceiling is attached after the construction of the boiler room side steel frame 20 is completed. As shown in FIGS. 1 (1) and 1 (2), Is an upper frame 3 that has been manufactured separately.
Only the 8U is fixed, and the steel frame 20 is completed except for the boiler suspension lower frame 38D.

[0015] Such a steel frame 20 and the upper frame 3
Subsequent to the completion of erection of 8U, the components of the lower frame 38D for suspending the boiler are carried into the steel frame 20, and the intermediate beam 30 and the auxiliary beam 32 are provided on the ground portion directly below the upper frame 38U.
And the sling rod 34 are assembled to assemble the lower frame 38D. And steel frame 2
The lower frame 38D assembled in 0 is connected to the upper frame 38U which is fixed to the upper end of the steel frame 20 in advance so that the lower frame 38D can be moved up. Therefore, as shown in FIG. 2 (1), a plurality of hoisting mechanisms 40 are installed and fixed on the upper surface portion of the upper frame 38U, and a wire (or rod) 42 as a hoisting member is provided up to near the ground. The wire is hung down, and the lower frame 38D for suspending the boiler is connected to and supported by the wire 42 on the ground.

After the above work, the boiler parts are carried into the steel frame 20 and the boiler upper block 44 is hung from the boiler hanging lower frame 38D. Then, the boiler upper block 44 is assembled by connecting and supporting it. Then, as shown in FIG. 2 (2), the hoisting mechanism 40 is actuated to wind up the wire 42 to hoist the upper block 44 to a predetermined height, and then the parts of the next boiler intermediate block 46 are located below the upper block 44. Is assembled while being connected to the boiler upper block 44.

Then, the wire 42 is lifted by the lifting mechanism 40.
By repeating the operation of winding up and the operation of assembling the boiler lower block 48 with the upper boiler intermediate block 46, the assembly of the boiler assembly 50 is completed as shown in FIG.

Therefore, the boiler suspension lower frame 38D
Is fixed to the upper part of the boiler suspension upper frame 38U and the steel frame 20, and then the lifting mechanism 40 and the wire 42 are removed, whereby the boiler assembling work is completed.

In this embodiment, the blocks 44, 46, 48 ... Of the boiler assembly 50 are assembled in the steel frame 20. However, these blocks 44, 46, 48. After assembling as a block unit at the above position, the block unit may be loaded into the boiler installation position, and may be loaded into the steel frame frame 20 from the entrance provided in the lower portion of the steel frame frame 20. By doing so, the assembly and installation time of the boiler can be greatly reduced.

Although the wire 42 is illustrated as the lifting member in this embodiment, a lifting rod may be used instead of the wire 42.

According to such an embodiment, when assembling a large suspension type boiler, each block of the boiler can be assembled and connected at a low position near the ground, so that the work safety and the work efficiency can be improved. In addition to being able to plan, temporary construction work such as scaffolding and safety net for high places work is unnecessary,
It is possible to reduce the assembly time and the construction cost. Also, since the boiler is assembled and hoisted in a state where the steel frame is integrated with the pillar and the suspended upper frame from the beginning, there is a concern that the steel frame will collapse even if an earthquake or strong wind occurs during the assembly work. There is no need for a design that is safe and has a strength higher than necessary in anticipation of this, and material costs and construction costs can be reduced.

[0022]

As described above, according to the present invention,
In particular, the boiler suspension support frame is separated from the top and bottom from the beginning, one is used to reinforce the steel frame, the other is used to assemble the boiler component block, and the lower frame to assemble the boiler block is initially placed on the ground side. The boiler block is gradually raised to perform the work of assembling the boiler block on the ground side. For this reason, firstly, the reinforcement of the steel frame has been realized by the frame from the beginning, and since sufficient strength is maintained during construction, it is possible to secure safety against disasters such as earthquakes and strong winds. Also, since the separated lower frame is suspended from the upper frame and the boiler block assembly work is performed on the ground side, work at high places is eliminated, and safety is also improved in this respect, and at the same time safety equipment at high places is installed. The temporary construction work can be reduced, and the reinforcing frame construction can be reduced because the steel frame frame reinforcement is used. Therefore, the effect of extremely shortening the process can be obtained.

[Brief description of drawings]

FIG. 1 is a front view and a side view showing an initial assembled state of a steel frame by a method of assembling a large-sized hanging boiler according to an embodiment.

FIG. 2 is an explanatory view showing a process of raising a lower frame and assembling a boiler block in the method of assembling the large-sized hanging boiler.

FIG. 3 is a front view and a side explanatory view showing a state in which the boiler is completely assembled by the method for assembling the large-sized hanging boiler.

FIG. 4 is a detailed view of a boiler suspension support frame.

FIG. 5 is an explanatory diagram of a first construction method according to a conventional example.

FIG. 6 is an explanatory diagram of a construction method according to a second conventional example.

[Explanation of symbols]

 20 Boiler Room Side Steel Frame 22 Column 24 Truss 26 Boiler Suspending Support Frame 28 Large Beam 30 Intermediate Beam 32 Auxiliary Beam 34 Sling Rod 36 Flange Joint 38U Upper Frame 38D Lower Frame 40 Lifting Mechanism 42 Wire (or Rod) 44 Boiler Top Block 46 Boiler middle block 48 Boiler lower block 50 Boiler assembly

Claims (1)

[Claims] 1. An assembling method in which a boiler supporting frame is provided at a top end of a steel frame and the boiler is suspended on the supporting frame to construct a boiler suspension frame attached to the top end of the steel frame. For the purpose of suspending the boiler, the upper frame is attached and fixed to the upper end of the steel frame, and the suspension members are suspended from the boiler suspension mechanism installed on the upper frame to near the ground and assembled on the ground side. After assembling the boiler by repeating the operation of connecting to the lower frame, raising the lower frame by the boiler suspension mechanism, and assembling each block of the boiler on the ground side and sequentially connecting to the preceding block of the upper side, the boiler is assembled. A large suspension type characterized in that the assembled lower frame is fixedly suspended by connecting and connecting with the boiler suspension upper frame. Boiler assembly method.