JPS583761A - Roll device for continuous casting machine - Google Patents

Abstract

PURPOSE:To reduce the temp. difference in rolls and to make the long-term use of the rolls possible by putting cylindrical bodies on the rolls and spraying cooling water in the spacings between the rolls and the cylindrical bodies. CONSTITUTION:Cylindrical bodies 3 covering the body parts of rolls 2 are put on the rolls 2, so that the direct contact of a slab 1 and the rolls 2 is averted. Water spraying pipes 4 for cooling water are inserted and installed in the spacings between the rolls 2 and the cylindrical bodies 3. Therefore, the temp. of the roll bodies drops, the thermal stresses generated are reduced considerably and mechanical strength is improved in accordance with the decrease in temp. Slow cooling is made possible by these, whereby the high temp. ingot is obtained and energy conservation is achieved. The life of the rolls is extended as well.

Description

[Detailed description of the invention] It's about the role you play.

In recent years, the production volume of continuous casting (hereinafter abbreviated as @o7o) has increased.
Although there is a significant amount of O, efforts are being made to round off the IlcIll iron basic unit to the ironworking unit.

Moreover, in recent years, slow cooling of slabs during high-speed casting has been carried out for the purpose of energy saving, but these measures impose a high heat load on the Ishida single support for a 1 mm thick slab.

The internal water-cooled OII-ru currently used for general Kl is!
], cracks, breakage, and wear.The roll was replaced at a cost of 4,000 yen. Cracks and roll damage are caused by thermal stress within the roll, and are caused by temperature differences within the cross section of the roll.

010 roll can be used directly with slabs at 1300-800℃**
Touch it and stop casting! Also 0. -5 ~2. O
The speed is very slow (Kn/mn), so it takes a long time to contact the slab. Therefore, at the slab and OII contact points, 60
Temperatures range from 0 to 300 degrees Celsius. However, *Other than the touch point
The part is relatively low temperature, at 200~100''C.
．． Big II 1ml! A difference occurs. Therefore, in the vicinity of the four-wheel surface, an O stress exceeding the yield stress is generated, inducing cracks and the like.

The tellko10c+ is used under extremely harsh conditions, and as mentioned earlier, life expectancy is becoming increasingly harsh.

One way to extend the life of this roll O is to cool the roll with water, but with this method it is impossible to obtain a high-Kt slab that also cools the slab. be.

Therefore, in order to prevent the C10 roll from coming into direct IDI contact with the slab, the present invention attaches a cylindrical body to the 0-roll shaft and injects cooling water into the gap formed between the roll shaft and the cylindrical body. By sprinkling water), the temperature difference within the roll is further reduced, the generated thermal stress level is significantly lowered, and the roll can be used for a long time.

Examples will be described below with reference to the drawings.

The current 070 roll mechanism for slow cooling is t2nd rll.
As shown in the part □■, it is supported by a 227111m roll (internal water-cooled type) 2', supported by bearing chocks at both ends, and held by 7 frames.

Therefore, in the present invention, as shown in the 00 part of FIG. 1 and FIG.
It is attached to the cylindrical 113 pipe p-ru 2 so that the slab l and roll 2 do not come into contact with each other.

This is the tenth point of the present invention. By providing 11 roll machines like this, 1.010*-roll shaft body 2 (D
@jI16 temperature station increases the apparent heat transfer coefficient by covering the tube 3, and also due to the # relationship of heat transfer i1, it becomes 160-100c and #! i is uniform heating.

Also, the thermal stress generated is reduced (r.

-/- or less), and mechanical stiffness also improves as the roll m decreases.

To the east, the roll shaft 2, which is the 2nd C1II point of this invention, and the cylindrical body 301% (when the cooling water O water sprinkling pipe 4 is inserted and installed in the IK shadow formation gj!, 1Ii-), - the roll shaft body Oimt further decreased to 1 with uniform heating below 100℃.

The thermal stress generated is also significantly reduced (below lkF/-), and 1
1ji: As the strength decreases, the mechanical strength also greatly improves.

Moreover, while it has a large cooling effect on the roll, cooling on the slab is extremely small, making it possible to slowly cool the slab O.

In this way, one shot - by using a roll device) 0/
C-Roll O can be used stably for a long period of time, and also enables slow cooling of the slab.

Here, the C10 roll shaft main body 2t) is a maintenance M40 cylinder 3, but the inner diameter of the cylinder is slightly larger than that of some external roll machines. The thickness of the cylinder is selected in accordance with the specifications of the C10 roll, ranging from several to several thicknesses. Also, what is the material?

Use a material that is heat resistant and M11 resistant.

The lifespan of this cylinder 3 is currently 0 if only the first point of the present invention is considered.
It is expected that the life of 10 rolls will be about the same as 2'O, but @20
The addition of key points extends life and reduces replacement time and costs, and the tube 3 itself is much cheaper to maintain and repair than the roll 2'.

Therefore, by providing the four-wheel mechanism of the present invention, slow cooling becomes possible, yielding high-quality slabs, and saving energy, as well as extending the life of the rolls and making it possible to produce steel by OLO without much heat. Looking forward to the benefits! It's for a purpose.

[Brief explanation of drawings]

FIG. 1 is a side view of a roll 010 to which the present invention has been applied. No. 21g is a perspective view showing the state in which the roll according to the present invention and the conventional roll are installed in continuous casting equipment. 1--Slab, 2--Roll shaft body, 3--Cylinder to be adhered, 4---Water pipe. Representative Patent Attorney Masamitsu Akizawa 62 people

Claims (1)

[Claims] (1) A cylindrical body with an inner diameter larger than the outer diameter of the roll shaft body is attached to the roll shaft body, and a water sprinkler pipe is arranged in the gap formed between the roll shaft body and the cylindrical body. Continuous casting machine Omm sill installed.