JPH086897B2 - Hanging boiler installation method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a boiler suspended and supported by a steel frame.

[0002]

2. Description of the Related Art FIG. 4 is a side view showing an example of a conventional installation method of a boiler suspended and supported by a steel frame. The hanging type boiler includes a central steel frame 1, a peripheral steel frame 2 provided around the central steel frame 2, a boiler main body 3 suspended and supported by the central steel frame 1, and a boiler accessory device 4 attached to the peripheral steel frame 2. And so on. As a construction method for assembling these, first, by using a large mobile crane 5, the main pillars, pillars, beams, etc. that compose the central steel frame 1 are sequentially stacked from the lower stage, and the uppermost girder is assembled. After that, each part of the boiler main body 3 is hung from the top one in order and assembled to the bottom. On the other hand, the peripheral steel frames 2 and the boiler auxiliary equipment 4 arranged on these steel frames are hung in parallel with the assembly of the boiler body 3 by the mobile crane 5 to lift the components and parts one by one, and the lower floor Assembled one by one to the upper floor.

[0003]

As described above, in the conventional boiler installation method, the constituent members and parts are hoisted by the mobile crane one by one, and they are sequentially assembled from the lower floor to the upper floor. There were the following issues to be solved. 1) The work efficiency is poor because all the components are mounted in a high place. 2) A scaffold is required to secure the safety of work in high places, and a large amount of manpower is required for its assembly and disassembly. 3) Therefore, there is little room for drastic process reduction.

[0004]

In order to solve the above-mentioned conventional problems, the present invention provides a central steel frame, a boiler main body suspended and supported by the central steel frame, and a periphery of the central steel frame. In the installation method of the suspended boiler equipped with the peripheral steel frame and the boiler auxiliary equipment attached to the peripheral steel frame, a hoisting beam that extends from the top of the central steel frame to the periphery is temporarily installed, Assembling the zone module consisting of the equipment attached to the projecting part and the equipment attached to the boiler on each floor of the peripheral steel frame above ground, and the upper floors of these zone modules are lifted by the above equipment. At the same time, we propose an installation method for a suspended boiler, which is characterized by repeating the process of joining the upper part of the lower floor to the lower part in order.

[0005]

The function of the present invention has the following functions. 1) The number of times each member is lifted to a high place is greatly reduced. 2) Installation work of the boiler main body, which is suspended from the central steel frame, which has been completed to be erected, and installation work of the peripheral steel frame and boiler auxiliary equipment, can be performed in parallel,
The construction period is shortened. 3) Since there are many ground operations, the efficiency is improved and the safety is improved.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the method of the present invention will be described with reference to FIGS.
Will be described. FIG. 1 is an overall side view showing a suspended boiler that has been installed by the method of this embodiment, FIG. 2 is a perspective view showing a zone module in which boiler auxiliary equipment is arranged on a peripheral steel frame, and FIG. 3 (a). , (B) are diagrams showing an installation process.

The boiler installed according to this embodiment is a large hanging boiler. Central steel frame 1 shown in FIG.
0 is formed by a plurality of support pillars 11 arranged in a rectangular shape, a large beam 12 mounted on the uppermost of them, and pillars and beams not shown. Boiler body 30
Is suspended from the girder 12 by a suspension rod or the like, and a peripheral steel frame 20 is provided around the suspension. The peripheral steel frame 20 has five layers (reference numerals 25, 26, 27, 2 in the illustrated example).
8, 29), and the boiler auxiliary equipment 40 is arranged on each floor.

In this embodiment, the target of zone modularization is the peripheral steel frame 20 of the boiler supporting steel frame shown in FIG. As shown in FIG. 2, a steel frame member 21, a floor material 22, a handrail 23, a suspension column 2
4, including the boiler auxiliary equipment 40, and horizontal beams, vertical beams, etc., which are not shown, are assembled on the ground for each zone and are modularized.

Since the peripheral member steel frame 20 is formed so as to surround the four sides of the central portion steel frame 10 formed in a rectangular horizontal cross section, when assembling and modularizing on the ground,
Assemble one side as a unit (one zone). In the present embodiment, the peripheral steel frame is divided into front, rear, left and right in the following, with the front 5th floor module 25a, the rear 5th floor module 25b, and the left 5
The floor module 25c and the right fifth floor module are designated as 25d, and similarly, the fourth floor module is 26a to 26d, the third floor module is 27a to 27d, and the second floor module is 28a to 2.
The boiler installation process will be described with reference to FIG.
Since there is almost no floor material 22, the boiler auxiliary equipment 40, etc. shown in FIG. 2 only on the first floor, the hanging columns 24, beams, etc. are used as the peripheral steel frames 29a to 29d.

The installation order of the boiler in this embodiment is as follows: the support column 11 and the girder 12 forming the central steel frame 10.
Are successively lifted by a large crane and moved to build. At the same time, on the ground, peripheral steel frames and boiler auxiliary equipment will be modularized for each zone. Needless to say, the modularization order is such that the uppermost 5th floor modules 25a to 25d of the peripheral steel frame 20 are first assembled, and then the lower ones are sequentially assembled. At the time of assembling, the floor material 22, the steel frame member 21, the suspension column 24, etc. are assembled, and the boiler auxiliary equipment 40 is also arranged and mounted on the ground in a regular manner. That is, all the members to be placed in this zone are mounted and assembled on the ground. However, if the module becomes large and cannot be mounted on the transportation means, for example, the dolly 55, there is no problem even if the module is further divided and assembled and transported as a separate body.

As soon as the main steel frame 10 in the central portion has been built, a hoisting beam 50 extending to the peripheral portion is temporarily installed on the top of the large beam 12. And the overhanging portion, that is, the peripheral steel frame 20
A hoisting equipment, such as a jack and a large winch 51, is installed above the installation position of, and the connecting device 52 is hung. Then, of the modules that have been assembled on the ground, for example, the front fifth-floor module 25a is mounted on the dolly 55 and, as shown in FIG. The connection device 52 is connected so that it can be completely lifted. At the same time or individually, the rear 5th floor module 25b and the left and right 5th floor modules 25c,
25d is also carried in by the dolly 55 and connected to each connecting device 52. In parallel with this, the parts 31 of the boiler main body 30 are carried in by a trailer 56 or the like which is a conveying means,
It is also possible to carry out the work of hoisting and installing from the top.

As described above, the modules are hoisted as soon as the connection between each module and the hoisting device is completed, but the hoisting height is
The height of the module on the next floor is limited to that which can be loaded by the dolly 55. Then, the next-floor floor module (for example, the fourth-floor module 26a) is carried in and joined with the previously hung module (for example, the fifth-floor module 25a) to be integrated. Such loading, joining, and lifting are repeated as shown in FIG. 3B to complete the peripheral steel frame 20 including the boiler auxiliary equipment 40. Also, the installation work of the boiler main body 30 supported by the central steel frame will be continued in parallel.

The connection and hoisting order of the above-mentioned modules are not particularly limited, but if only one side, for example, only the front part, is hoisted from the first floor to the fifth floor before all the other sides, Such a method is not preferable because a large load is applied only to the front part and adversely affects the support columns 11 and the girders 12. To ensure that the load is evenly distributed all around, for example, only the 5th floor part, 4 sides are hung separately one after the other, or 2 opposite sides are hung at the same time, or 4 sides are hung at the same time, and then the next floor It is desirable to be able to hoist the module in the (eg, 4th floor) part.

[0014]

According to the method of the present invention, it is possible to significantly reduce the work at height in the installation work of the suspended boiler, and to install the boiler main body suspended and supported by the central steel frame. Since the peripheral steel frame zone module installation work including boiler auxiliary equipment can be performed in parallel, the following effects can be obtained. 1) The construction period can be greatly shortened. 2) The increase in ground work improves work efficiency and reduces the number of workers. 3) Construction safety is improved.

[Brief description of drawings]

FIG. 1 is an overall side view showing a suspended boiler that has been installed by an embodiment of the method of the present invention.

FIG. 2 is a perspective view illustrating a zone module in which a boiler accessory device is attached to a peripheral steel frame in the above embodiment.

FIG. 3 is a diagram showing an installation process in the above embodiment.

FIG. 4 is a side view showing an example of a conventional installation method.

[Explanation of symbols]

 1 Central Steel Frame 2 Peripheral Steel Frame 3 Boiler Main Body 4 Boiler Ancillary Equipment 5 Mobile Crane 10 Central Steel Frame 11 Support Pillar 12 Girder 20 Peripheral Steel Frame 21 Steel Frame Member 22 Floor Material 23 Handrail 24 Suspended Pillar 30 Boiler Main Body 31 Boiler Main Body Parts 40 Boiler-equipped equipment 50 Lifting beam 51 Lifting equipment 52 Connecting device 55 Dory 56 Trailer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Hori 1-1, Atsunoura-machi, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Hideyuki Yoshioka 1-1, Atsunoura-cho, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (56) Reference JP 63-118504 (JP, A) JP 60-62504 (JP, A)

Claims (1)

[Claims] 1. A central steel frame, a boiler main body suspended and supported by the central steel frame, a peripheral steel frame provided around the central steel frame, and a boiler accessory device attached to the peripheral steel frame. In the method for installing a suspended boiler equipped with and, a suspension beam that extends from the uppermost part of the central steel frame to the periphery is temporarily installed, and lifting equipment is installed on the overhanging part, and each floor part of the peripheral steel frame. Assemble zone modules consisting of the equipment attached to the boilers on the ground, suspend the upper floors of these zone modules with the above-mentioned lifting equipment, and join the upper portion of the lower floors to the lower portion in sequence. A method for installing a suspended boiler, which is characterized in that