JPH0454211Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is a bent pipe in which only parts that are subject to particularly severe wear can be replaced when slag is sucked from a ladle of a torpedo car using a suction device. It is related to.

<Problems to be solved by conventional technology and ideas> When hot metal is injected from a blast furnace into a torpedo car and transported to a converter factory, a desulfurizing agent such as Na ₂ CO ₃ or CaO is added to desulfurize the hot metal. Addition method is adopted. In this case, desulfurization agents such as Na ₂ CO ₃ and CaO react with sulfur components in the hot metal, and slag is formed on the top surface of the hot metal. Therefore, the slag must be removed before being transferred to the converter, and as a removal device, as shown in FIG.
There is a method of suctioning and removing the solidified slag a using a vacuum pump e, but in this case, there is a suction The bent slag collides particularly violently, causing significant wear and tear, and the bend pipe itself must be replaced after about 30 days, resulting in extremely high costs in terms of both work and materials. That is, even though it is made of high chromium cast iron or the like in consideration of wear resistance, it is subject to severe wear and tear. Even if an attempt is made to repair only that portion of high chromium cast iron by overlay welding, there is a problem that cracks will appear in the base metal during underlay welding, making it impossible to perform a good repair.

In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a bent pipe in which only the parts that are subject to severe wear and tear can be replaced.

<Means for Solving the Problems> The above objects of the present invention can be achieved by a bent pipe having the following configuration. In other words, the gist is that an opening is formed on the outside of the bent part of the bent pipe body made of a wear-resistant material such as high chromium cast iron, and the pipe can be attached to and detached from the opening by appropriate means, and can be fitted tightly. This is a bend pipe for a ladle smelting slag suction device characterized by being equipped with a liner member, and by attaching a removable blind plate member to the liner member, the liner member can be easily removed. Replacement and attachment/detachment to the bend pipe body can be performed more reliably and easily.

<Embodiments and operations> The bent pipe according to the present invention will be described in detail below with reference to drawings showing embodiments thereof.

FIG. 1 shows an embodiment of the bent pipe of the present invention.
That is, 1 is a bent pipe body made of a wear-resistant material such as high chromium cast iron;
An opening 2 is cut out in its outer curved surface, and a blind plate mounting member 3 is integrally formed around the periphery of the opening 2. Further, as shown in FIG. 2, the liner member 4 that is tightly fitted into the opening 2 and forms an inner wall surface that is substantially flush with the inner curved surface of the bent pipe main body 1 when fitted is blinded. The blind plate member 5 is attached to the plate member 5 by fastening members 6, 6, etc. such as bolts, and the peripheral edge of the blind plate member 5 is attached to the fasteners 7, 7 such as bolts of the flange mounting member 3. ,…
It can be attached and detached at will. Therefore, by attaching the blind plate-like member 5 to the blind plate attachment member 3, the liner member 4 is attached so as to be integral with the bend pipe main body 1.

The liner member 4 is desirably made of the same material as the bent pipe main body 1, for example, a wear-resistant material such as high chromium cast iron.
Although it is possible that the liner member 4 is formed integrally with the liner member 4, it is only the liner member 4 that is subject to wear and tear, so it is preferable to adopt a configuration in which the liner member 4 and the blind plate-like member 5 can be attached and detached separately. desirable.

In the present invention with the above configuration, Fig. 3A,
As shown in B and C, after about 30 days of use, the liner member 4 is worn out as shown in A in the figure, and only the liner member 4 is removed by the blind plate-like member 5 as shown in B in the figure.
Then, a new liner member 4 is reattached to the blind plate-like member 5, and the bent pipe main body 1 is attached.

<Effects of the invention> As described above, according to the present invention, only the parts of the front and rear bend pipes that are subject to severe wear and tear can be replaced freely when suctioning slag. About 12 bent pipes were required per year, but with the present invention, only the liner member needs to be replaced, and the replacement work is also easy, significantly reducing the annual replacement cost. That is, by minimizing the number of parts to be replaced without wasting the bend pipe itself, it is possible to utilize the bend pipe as an economical and highly efficient bend pipe during replacement.

[Brief explanation of the drawing]

Fig. 1 is an explanatory cross-sectional view of the bent pipe body of the present invention;
Fig. 2 is an explanatory cross-sectional view showing the state in which the liner member is attached to the bent pipe main body, Fig. 3 A, B, and C are explanatory views showing the replacement state of the liner member of the present invention, and Fig. 4 is the slag It is an explanatory view showing an outline of a suction device. In the figure, 1... Bend pipe body, 2... Opening, 3
...Blind plate mounting member, 4...Liner member, 5...
...blind plate member, 6... fastening member.

Claims (1)

[Claims for Utility Model Registration] 1. An opening is formed on the outside of the bent part of the bent pipe main body made of a wear-resistant material such as high chromium cast iron, and the pipe can be attached to and removed from the opening by appropriate means, and the 1. A bend pipe for a ladle smelting slag suction device, characterized in that it is provided with a liner member that can be freely fitted into a shape. 2. A blind plate mounting member is integrally formed with the bend pipe body around the periphery of the opening, and a removably blind plate member is attached to the liner member,
Claim 1, wherein the liner member is closely fitted into the opening by attaching the blind plate-like portion to the blind plate mounting member using a fastening member such as a bolt. Bend pipe of ladle smelting slag suction device.