JPH057229Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a device for installing a scaffold for tuyere replacement work in a bottom-blowing converter, and more specifically, a device for easily attaching and removing the work scaffold to the converter. Regarding the mounting device that can be used.

[Conventional technology]

Figure 5 shows the tuyere replacement work for a bottom-blowing converter with a non-replaceable hearth bottom. There are various types of tuyere 8 for bottom blowing, but in general, many are long because they are heavy and penetrate the fireproof wall at the bottom of the furnace to reach the inside of the furnace. In terms of workability, it is best to carry out the process with the furnace 6 inverted. Therefore,
When replacing the converter 6, as shown in Fig. 4,
Scaffolding 1a is being erected from the surrounding work floor towards the bottom of the hearth by inverting it.

[Problem that the invention attempts to solve]

However, the height of most scaffolds was more than 10m above the ground, which caused the following problems.

It is dangerous because it involves working at heights.

Scaffolding cannot be erected unless you are a professional craftsman.

Assembling scaffolding is expensive, making tuyere replacement costs expensive.

On the other hand, it is possible to permanently install a scaffold made in one piece, but this is not preferable because the space directly above the converter is generally narrow and there are restrictions on the location of the scaffold, handling crane, etc.

This invention was proposed in order to solve the above-mentioned problems, and it is an installation of scaffolding for tuyere replacement work of bottom blowing converter, which can be easily and safely installed by a small number of people. The purpose is to provide a device.

[Means for solving the problem] The present invention solves the above-mentioned problem, and is applied to a mounting device for attaching a working scaffold to the bottom surface of a bottom blowing converter that is inverted for tuyere replacement. , the following technical measures were taken. In other words, a work scaffold assembled integrally with predetermined members and a scaffold installed at a predetermined position on the edge of the bottom surface of the converter on the intersection line between the vertical bisector of the converter's rotation axis and the bottom surface of the converter. The first locking part is locked to the first locking part of the converter which is turned upside down in the direction above the converter, and the converter is rotated in the direction in which the converter is turned upside down. and a second locking portion provided at a predetermined position of the work scaffold for attaching the work scaffold to a predetermined position on the bottom surface of the converter.

[Effect]

As described above, the installation device for a scaffold for tuyere replacement work in a bottom-blowing converter of the present invention includes a work scaffold that is integrally assembled using predetermined members, and a vertical two-way axis of rotation of the converter. A first locking part provided at a predetermined position on the end of the hearth bottom surface on the line of intersection between the dividing plane and the bottom surface of the converter, and a first locking part provided on the work scaffold that locks to the first locking part. Since it is composed of two locking parts, a working scaffold can be easily and safely installed by a small number of people on the bottom surface of an inverted converter furnace.
This can be done similarly easily when removing work scaffolding.

Hereinafter, the operation of the present invention will be explained with reference to FIG.
To attach the scaffolding to the bottom of the converter 6, attach the converter 6 to the first locking part 2 provided on the bottom of the converter.
The trunnion 9 is positioned above the converter 6.
Turn it over with the center at the center. On the other hand, the wire 4 is attached to the scaffold 1, and the wire 4 is lifted by the crane 5, and the second locking part 3 on the scaffold 1 side is locked with the first locking part 2 of the converter 6 (the third Diagram a). The details of the locking portion are shown in FIG. 2, where FIG. 2a is a side view and FIG. 2b is a front view.

With both locking parts locked, rotate the converter 6 in the direction of inverting it, and operate the crane 5 to maintain the scaffold 1 horizontally (third
Figure b).

When the converter 6 is completely inverted, the scaffold 1 will be installed at a predetermined location on the bottom of the furnace. After fixing the scaffold 1 to the hearth bottom, the crane 5 is removed (Fig. 3c).

In addition, when removing the scaffold 1 from the upper part of the hearth bottom, the above-mentioned operation may be performed in reverse.

As described above, since the integrated working scaffold can be attached to the hearth bottom surface all at once using a crane, there is no need to assemble the scaffolding on the hearth bottom each time the tuyere is replaced. Work can be carried out efficiently.

〔Example〕

An embodiment of the present invention is shown in Figs. 1 and 2, in which Fig. 1a is a plan view of the scaffolding 1, Fig. 1b
is a side view of the scaffold 1, and FIG. 2 is an explanatory diagram of the first and second locking parts.

The scaffold installation device of the present invention has a scaffold 1 and a converter 6.
It consists of a first locking part 2 provided at the end of the hearth bottom, and a second locking part 3 provided at the end of the scaffold 1 and locking with the first locking part 2. .

As shown in FIG. 3, the first locking portion 2 is provided at a predetermined position on the line of intersection between the vertical bisector of the rotating shaft (trunnion 9) of the converter 6 and the furnace bottom. The second locking portion 3 is provided at the end of the scaffold 1, and is configured to lock with the first locking portion 2 and swing around a shaft 15, as shown in FIG.

The scaffolding 1 includes a main beam 11 and sub-beams 12, 13, 14 that constitute a framework of a work floor based on the main beam 11.
A handrail 10 is attached to the secondary beam 12 to ensure the safety of workers. Moreover, a lath net 19 is laid on the upper surface composed of the secondary beams 12 to 14 to form a work floor. In addition, to cross over to the scaffold 1, a ramp 7 extending from the deck 18 on the converter factory side is used, but the connection between the ramp 7 and the scaffold 1 is as shown in Figure 1b.
This is done by locking the locking portion 17 on the ramp 7 side into the hole 6 (not shown).

The example shown in Fig. 1 was carried out at Mizushima Steel Works No. 1 Steelmaking Plant of the present applicant, and according to this, scaffolding assembly work that conventionally required 4 to 5 people and half a day was completed. However, two people can now do it in 0.5 to 1 hour.

[Effect of idea]

The scaffolding installation device for tuyere replacement work of a bottom blowing converter of the present invention can carry out scaffold assembly work safely and efficiently, and is extremely effective in reducing tuyere replacement costs. play.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention, Figure 1a is a plan view of the scaffold, Figure 1b is an explanatory view of the side of the ramp, Figure 3 is an explanatory diagram of the operation of the present invention,
FIGS. 4 and 5 are explanatory diagrams of conventional examples. 1, 1a...Scaffolding, 2...First locking part, 3...
... Second locking part, 4 ... Wire, 5 ... Crane, 6 ... Converter, 7 ... Tarap, 8 ... Tuyere,
9... Trunnion, 10... Handrail, 11... Main beam, 12, 13, 14... Sub beam, 15... Axis, 1
6... Scaffold side locking part, 17... Tarap side locking part, 18... Deck, 19... Lath net.

Claims (1)

[Scope of Claim for Utility Model Registration] A mounting device for attaching a working scaffold to the bottom surface of a bottom-blowing converter that is inverted for tuyere replacement; a first locking portion provided at a predetermined position on an end of the bottom surface of the converter on a line of intersection between a vertical bisector of the rotating shaft of the furnace and the bottom surface of the converter; is engaged with the first locking part of the converter, which has been turned over in a direction above the converter, and rotated in a direction in which the converter is turned upside down, thereby moving the work scaffold to the converter. and a second locking part provided at a predetermined position of the work scaffold to be attached to a predetermined position on the bottom surface.