JPH0355405A - Boiler installation working space structure - Google Patents

Abstract

PURPOSE:To shorten a term of boiler installation works by a method wherein a temporary working floor by which a working space is partitioned into upper and lower spaces is disposed on the intermediate part in the direction of height of a boiler body. CONSTITUTION:A temporary working floor 26 disposed between a boiler cage part 24 and a lower device C has a plurality of plates 28 temporarily joined with the upper surface of a steel frame beam 30. A range in which the temporary working floor 26 is disposed is a range having an area, as seen in a plane view, wide enough for concealment of a lower device C and a secondary air preheater 32 mounted on the lower device C. The working space is vertically partitioned by the temporary working floor at height H2 being approximately the middle of a whole height H1 of a frame structure 12. After a device is hung in the direction of an arrow mark A and placed on the temporary working floor 26 and pulled laterally in a direction B, during building of a boiler 10, members and devices are installed, in order, in a position as they are hoisted in the direction of an arrow mark C by means of a hoist 38 mounted on the frame structure 12. Since a furnace A and a boiler cage part 24 are not interfered with each other in a position in the direction of height, simultaneous installation work thereof can take place.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a boiler installation work space structure in boiler construction.

[Conventional technology]

There are various types of boilers, but boilers for thermal power generation have a height of 90 m and a weight of 15,000 tons.

To construct such a boiler for thermal power generation, first, a frame structure surrounding the entire boiler is assembled using steel frames or the like. The main part of the boiler is covered by a boiler casing. The main part is divided into a furnace and a boiler cage part, which are arranged adjacent to each other. By the way, when the boiler is in operation, the boiler casing becomes hot, so as a means to prevent the effects of elongation due to this high temperature, a large steel beam is installed on the ceiling of the frame structure, and the top end of the boiler casing is attached to this large beam. It is hung and fixed. Therefore, in order to install the boiler while assembling it, the upper end of the boiler casing is hoisted up and attached to the ceiling girder, and then the members, equipment, etc. are hoisted one after another and the boiler casing and its covering are lifted from the upper end to the lower end. Installation work will be carried out on the boiler itself.

[Problem to be solved by the invention]

However, on the boiler cage side, unless not only the installation work of the pressure-resistant part in the boiler cage part but also the water pressure test is completed, the installation work of the lower equipment disposed below the boiler cage part cannot be performed. In other words, the floor surface of the frame structure is occupied as a work space for hoisting the boiler casing, upper parts of the boiler body, equipment, etc., and also as a work space for lifting parts, equipment, etc. from the construction site above the boiler. is not enough. Therefore, there is a problem in that the installation work cannot be performed on the floor, and the installation work of the lower equipment is delayed, prolonging the construction period.

The present invention has been made in consideration of the above-mentioned facts, and an object of the present invention is to obtain a boiler installation work space structure that can shorten the construction period by making it possible to work on the floor of a frame structure.

[Means to solve the problem]

The invention described in claim (1) suspends a pressure-resistant part of a boiler cage part disposed in an upper part of a boiler main body from a steel beam, and suspends lower equipment arranged below the boiler cage part in sequence from the pressure-resistant part. This is a boiler installation work space structure for installing the boiler while the boiler is being installed, and is characterized in that a temporary work floor is provided in the middle part of the boiler body in the height direction to partition the work space in the vertical direction.

The invention set forth in claim (2) is arranged between the pressure-resistant part of the boiler cage part and the lower equipment in the temporary work floor set forth in claim (1), and includes an installation work of the pressure-resistant part of the boiler cage part. The present invention is characterized in that the work for installing the lower equipment can be performed separately.

[Effect]

In the invention described in claim (1), a temporary work floor is provided in the middle part of the boiler body in the height direction to partition the work space vertically, so the installation work for the upper work space and the installation work for the lower work space are performed separately. can be done. In the upper work space, parts and equipment are placed on a temporary work floor and then lifted and installed on the steel beams one after another. In the lower working space, members, equipment, etc. are brought in as they are and stacked one after another on the lower end of the boiler main body, for example on the floor, for installation. At this time, since there is a temporary work floor above the lower work space, work can be carried out safely even if objects fall from the upper work space.

Further, in the invention as set forth in claim (2), since the temporary working floor is disposed between the pressure-resistant part of the boiler cage part and the lower equipment, the installation work of the pressure-resistant part of the boiler cage part, which requires a particularly long construction period, can be carried out. Also, the water pressure test, etc. and the installation work of the lower equipment can be performed separately and at the same time. This will significantly shorten the construction period.

〔Example〕

FIG. 1 shows a boiler 10 constructed using the boiler installation work space structure according to this embodiment. The outer periphery of this boiler 10 is made into a frame structure 12, which is arranged so as to surround a boiler casing 14.

Note that the outer wall is omitted in Figure 1. Frame structure 12
is constructed with steel columns 16, steel beams 18, and a floor 20 as main members. In addition, on the ceiling of the frame structure 12,
Four ceiling slats 22 are arranged. The boiler casing l that houses the boiler body is placed in these four ceiling casings 22.
4 is fixed in a suspended state.

As shown in Fig. 2, the boiler body is located on the left floor surface 2.
Furnace A is installed above the OA. This furnace A
A boiler cage section 24 and lower equipment C are arranged above the floor surface 2OB on the right side of FIG. 2 so as to be adjacent to each other. The boiler cage section 24 is equipped with pressure-resistant sections such as a reheater, a primary heater, and a energy saver. In addition, in the lower device C,
A primary air preheater etc. are installed. Here, the installation work of the furnace A and the installation work on the boiler cage part 24 side are as follows:
It is supposed to be done separately.

A temporary work floor 26 is provided between the boiler cage section 24 and the lower equipment C. As shown in Figure 4,
This temporary work floor 26 has a plurality of plates 28 attached to the steel beams 3.
The shape is formed by temporarily joining the top surface of 0. The range in which the temporary work floor 26 is arranged is a range that hides the lower equipment C and the secondary air preheater 32 attached to the lower equipment C in a plan view. Further, as shown in FIG. 3, the height H2 at which the temporary work floor 26 is installed is approximately 37 m, which is approximately the middle of the entire height Hl (81 m) of the frame structure l2 in this embodiment. This allows the work space to be partitioned vertically. Hereinafter, they will be referred to as the upper work space and the lower work space.

An example of the work procedure when installing the pressure-resistant part of the poiler cage part 24 in the upper work space partitioned off by the temporary work floor 26 will be described with reference to FIG. With the truck crane 34 loading parts, equipment, etc. onto the truck 36, the fifth
After lifting it in the direction of arrow A in the figure, it is placed on the temporary work floor 26. Next, after pulling horizontally in the direction of arrow B in Fig. 5, boiler 1
Lifting machine 38 installed on frame structure 12 during construction of 0
While hoisting it up in the direction of arrow C in Fig. 5, parts, equipment, etc. are successively installed at predetermined positions.

On the other hand, when installing the lower equipment C in the lower work space partitioned by the temporary work floor 26, the members, equipment, etc. may be carried in and installed as they are at predetermined positions on the floor surface 2OB.

When installing the boiler 10, the furnace A and the boiler cage part 24 do not interfere with each other in the height direction, so that the installation work can be performed at the same time. On the other hand, since the boiler cage section 24 and the lower equipment C are at the same height, in this embodiment, a temporary work floor 26 is used to partition them, thereby securing an upper work space and a lower work space. This temporary work floor 26 hides the space where the lower equipment C, the secondary air preheater 32, etc. are installed in plan view.

For this reason, parts may be accidentally removed while working in the upper work space.
Even if equipment is dropped, it will not reach the work space below.
It can be received on the temporary work floor 26. This ensures the safety of work in the lower work space.

In addition, by providing a temporary work floor 26, installation work of the pressure-resistant part of the boiler cage part 24 can be carried out using a truck crane 34.
, using a lifting machine 38, etc., and the lower equipment C is carried directly onto the floor 2OB and the installation work is performed, so the installation work of the pressure-resistant part of the boiler cage section 24 and the installation work of the lower equipment C are performed. can be done separately and at the same time. Therefore, the required construction period is halved, and each process can be carried out without stress.

When the installation work in the upper and lower working spaces of the temporary working floor 26 is almost completed, the pressure-resistant part of the boiler cage part 24 and the lower equipment C are connected while removing the temporary working floor 26. The installation work has been completed.

〔Effect of the invention〕

As explained above, the boiler installation work space structure according to the present invention can separate the work space vertically by providing a temporary work floor in the middle part of the boiler body in the height direction, and the installation work can be carried out in the lower work space. It has the excellent effect of being able to be carried out safely.

In addition to the above effects, if the temporary work floor is installed between the pressure-resistant section of the boiler cage section and the lower equipment, the installation work of the pressure-resistant section of the boiler cage section and the installation work of the lower equipment can be separated, allowing both the upper and lower parts to be installed simultaneously. It has the excellent effect of significantly shortening the construction period.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view showing a boiler constructed using the boiler installation work space structure according to this embodiment, Fig. 2 is a sectional view taken along the line ■■ in Fig. 1, and Fig. 3 is a boiler cage section and lower part. FIG. 4 is an enlarged front view of the equipment, FIG. 4 is a sectional view taken along the line IV-rV in FIG. 1, and FIG. 5 is an explanatory diagram showing an example of simultaneous work using the work space structure according to FIG. DESCRIPTION OF SYMBOLS 10... Boiler, 20, 2OA, 20B... Floor, 24... Boiler cage part, 26... Temporary work floor, 28... Plate.

Claims (2)

[Claims] (1) Boiler installation work in which the pressure-resistant section of the boiler cage section located at the top of the boiler body is suspended from a steel beam, and the lower equipment arranged below the boiler cage section is successively suspended and installed onto the pressure-resistant section. What is claimed is: 1. A boiler installation work space structure, characterized in that a temporary work floor is provided at a heightwise intermediate portion of the boiler main body to partition the work space in the vertical direction. (2) The temporary work floor is arranged between the pressure-resistant section of the boiler cage section and the lower equipment, and is capable of separating the installation work of the pressure-resistant section of the boiler cage section and the installation work of the lower equipment. The boiler installation work space structure according to claim 1, characterized in that: