JPS6338802A - Method of assembling boiler steel frame - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for assembling a boiler steel frame suitable for use in constructing a large boiler.

Prior Art Figure 6 shows how steel frames are assembled when constructing a large boiler. Reference numeral 1 indicates pillars that constitute the structure, and reference numeral 2 indicates beams, which are also made of steel frames. This pillar
Yako 2 is assembled sequentially from the first section on the lower side to the fifth section on the upper side using a crawler crane 3 placed on the ground. An upper main beam 4 is attached to the top of the structure,
A jib crane 5 is installed on this upper main beam 4 using a crawler crane 3. Thereafter, the jib crane 5 is used to lift and install other members constituting the structure, and to take in equipment.

Problems to be Solved by the Invention By the way, the conventional method of assembling a boiler steel frame employs a method of installing a knob crane 5 from the ground using a crawler crane 3 on top of a structure. Because the work is carried out at high places, it involves extremely dangerous work at high places, which poses safety problems and reduces work efficiency. Therefore, it has been desired to provide a construction method that can streamline the work and safely install the jib crane.

Means for Solving the Problems In order to solve these problems, the present invention includes a first step of assembling a boiler steel column, and a second step of attaching a peripheral upper beam to the top of the boiler steel column. a third step of assembling on the ground an inner upper beam installed inside the upper inner beam of the peripheral section; a fourth step of installing a jib crane on the inner upper beam; a fifth step of installing a secondary beam in a direction perpendicular to the upper beam; a sixth step of installing a temporary beam and a hydraulic jack on the top of the boiler steel column; a seventh step in which the inner upper beam including the jib crane assembled in the third to fifth steps of Fuji is connected with a lifting rod to a predetermined position above the boiler steel column; A method for assembling a boiler steel frame is provided, which comprises an eighth step of setting the inner upper beam lifted by the above at a predetermined position on the upper part of the boiler steel column, and then attaching a jib crane running rail and a stopper.

As described above, in the present invention, the work of assembling the jib crane at a high place is eliminated, and the two-part beam of the boiler steel frame is assembled on the ground, the jib crane is installed on it, and then these are integrated into the boiler. We adopted a method of hoisting it onto the top of the steel frame, which not only improves work safety, but also greatly contributes to improving work efficiency.

EXAMPLE Hereinafter, an example of the method for assembling a boiler steel frame according to the present invention will be described in detail with reference to FIGS. 1 to 5.

FIG. 1 is a schematic plan view of the assembled boiler steel structure, and FIGS. 2 to 5 are views taken along the line A--A in FIG. 1, showing the process of assembling the boiler steel frame.

First, a boiler steel column 10 consisting of columns 1 and beams 2 is assembled sequentially from the bottom to the top using a large heavy machine such as a truck crane (not shown) placed on the ground. Next, the upper beams 11, 12, and 13 located at the periphery are attached to the upper part of the boiler steel column 10. Next, the remaining part of the upper beam, that is, the peripheral upper beam 11.12.13
Inner upper beam 14.15.16.17 placed inside the
Assemble on the ground. The steps up to this point are shown in FIG.

After the inner upper beams 14 to 17 are assembled, the jib crane 5 is installed thereon. When the installation of the jib crane 5 is completed, it is inspected by a government agency based on laws and regulations. This inspection can be taken on the ground while installed on the inner upper beams 4 to 17. After the government inspection is completed, the jib crane 5 is used to install the secondary beams 18, 19, 20, 21 on the inner upper beams 14 to 17 in a direction perpendicular to the upper beams.
Install.

Next, temporary beams 2 are installed on both sides of the top of the boiler steel column 10, respectively.
2.23 and 24.25 are installed, and an appropriate number of iib pressure jacks 26 are installed thereon. A lifting rod 27 is connected between the installed hydraulic jack 26 and the inner two-part beams 14 to 17. The steps up to this point are shown in FIG.

In the next step, the inner upper beams 14 to 17 are lifted upward as a unit with the jib crane 5 mounted thereon by the hydraulic jack 26 and the lifting rod 27. Figure 4 shows the inside upper beams 14 to 17 in the process of being lifted up.

After lifting the inner upper beams 14 to I7 to a predetermined position above the boiler steel column 10 and setting them at that position, the knob crane running rail 28 and the stopper 29
to complete the installation of the knob crane 5 to the boiler steel structure.

After this, the knob crane 5 is used to open the structure, and (1) install and take in various parts and various types of equipment.

Effects of the Invention As detailed above, according to the present invention, there is no need to arrange large heavy equipment for installing the jib crane, and the jib crane can be assembled on the ground, eliminating work at heights and improving work safety. improves. In addition, government inspections can be taken on the ground, which helps maintain safety and shorten inspection time. Furthermore, since the inner upper beam is lifted integrally with the knob crane, various effects can be obtained, such as streamlining the work and improving work efficiency.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing a boiler steel structure assembled according to the present invention, and FIGS. 2 to 5 are taken in the direction of line A-A in FIG. 1 for explaining the present invention in detail. The arrow view and FIG. 6 are perspective views showing how steel frames are assembled when constructing a conventional large boiler. l... Column, 2... Beam, 5... Jib crane, 10... Boiler steel column, 11-13... Upper beam of peripheral area, 14-1
7.Inner upper beam, 18-21.Secondary beam, 22-25.
・Temporary beam, 26. Hydraulic jack, 27. Hanging (1 other person)

Claims (1)

[Claims] a first step of assembling a boiler steel column; a second step of attaching a peripheral upper beam to the top of the boiler steel column; and a second step of assembling an inner upper beam installed on the inside of the peripheral upper beam on the ground. 3, a fourth step of installing a jib crane on the inner upper beam, a fifth step of installing a sub-beam on the inner upper beam in a direction orthogonal to the upper beam, and a fifth step of installing a jib crane on the inner upper beam, a sixth step of installing a temporary beam and a hydraulic jack on the upper part, and connecting the hydraulic jack and the inner upper beam with a lifting rod to connect the inner upper beam including the jib crane assembled in the third to fifth steps. a seventh step of lifting the boiler steel column to a predetermined position at the top;
A method for assembling a boiler steel frame, which comprises the steps of setting the inner upper beam lifted in the seventh step at a predetermined position on the upper part of the boiler steel column, and then attaching a jib crane traveling rail and a stopper.