JPH03230848A - Device for pushing side weir in twin drum type continuous casting apparatus - Google Patents

Abstract

PURPOSE:To uniformly control wearing rate on refractory face of a side weir and to prevent the partial wear thereof by arranging pushing rate control means to each pushing member. CONSTITUTION:Pouring basin part is formed with one pair of rotating cooling drums 101 and one pair of the side weirs 102 pushing both end faces of the cooling drums 101 with side weir pushing devices providing plural pushing members (cylinders) 3. Molten metal R is supplied into the pouring basin part and solidified as the plate-state, and the molten strip S is continuously cast. Then, a servo valve 11 and a control panel 1 2 are arranged as the pushing rate control means to each pushing member 3 and controlled. By this method, the side weir can be continuously used for long time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a side weir pressing device for pressing a side weir of a twin-drum continuous metal strip casting machine against an end surface of a cooling drum.

[Conventional technology]

Fig. 3 is a perspective view schematically showing the main parts of a twin-drum continuous metal strip casting machine as an example of a conventional device, and Fig. 4 is a side view of the main part of Fig. 3 enlarged and partially cut away. It is a diagram.

In the above figure, 101 is a pair of cooling drums, the third
They are each supported so as to rotate in the direction indicated by arrow a in the figure. Reference numeral 102 designates a pair of side weirs, whose refractories 102a seal parts 101a on both sides of the cooling drum 101.
It is installed so that it slides in close contact with the Reference numeral 103 denotes pressing cylinders, which are mounted at three locations on the back surfaces of both side weirs 102, respectively.

107 is a vibration device for the side weir, and both side weirs 1
They are attached to the back of 02.

When continuously casting the metal strip S, first, both cooling drums 101 are rotated, and both refractories 102a are pressed against the seal portion 101a with a predetermined force by the pressing cylinder 103 to prevent leakage of the molten metal R and to Both side weirs 102 are vibrated in a small width in the lateral direction by a vibrating device 107 as shown by the dots in FIG. 3 to prevent the molten metal R from adhering to the refractory 102a. Next, the molten metal is continuously supplied to a pool formed by both cooling drums 101 and the side weir, solidified into a plate shape by the cooling drums 101, and drawn out from below.

[Problem to be solved by the invention]

However, in the conventional device, each pressure cylinder 1
The pressure of 03 is maintained evenly even if the contact surface of the refractory 102a is worn. However, the seal portion 1 of the refractory 102a
Material and temperature at the pressing point to 01a.

The contact conditions etc. are not necessarily the same, and the seal portion 101
Partial differences occur in the amount of wear of the refractory 102a due to sliding with the refractory 102a, but the wear progresses in areas that are prone to wear and there is no stopping point, and due to this uneven wear, the refractory 102a
The lifespan of a will be shortened. Therefore, it is necessary to frequently replace the side weir 102, which is a factor that inhibits an increase in the continuous casting time and continuous casting amount.

The present invention aims to solve the above-mentioned problems, and aims to provide an apparatus that uniformizes the wear of the refractory material of the side weir over the entire surface in continuous casting of metal strips and lengthens its life.

[Means to solve the problem]

The side weir pressing device of the twin-drum continuous casting apparatus of the present invention has a pair of side weir pressing devices pressed against both end surfaces of the cooling drum by the side weir pressing device equipped with a pair of rotating cooling drums and a plurality of pressing members. In an apparatus for continuously casting metal strips by supplying molten metal to a pool formed by a weir and solidifying it into a plate shape, each of the pressing members is provided with a pressing amount control means.

[Effect]

In the present invention, when continuous casting of metal strips starts,
The refractory surfaces of the side weirs slide against both end surfaces of the cooling drum and wear out. Each pressing member moves both side weirs toward the cooling drum while following the progress of wear.

At this time, the pressing amount (stroke) of each pressing member of the side weir is controlled by the pressing amount control device, and thereby,
The pressing surfaces of the side weirs pressed by the plurality of pressing members move in parallel toward the cooling drum without being inclined in any direction, and uneven wear of the refractory surfaces of the side weirs is prevented.

〔Example〕

Hereinafter, one embodiment of the present invention will be explained in detail with reference to FIGS. 1 and 2. Note that the same members and parts as in the conventional device are denoted by the same reference numerals in FIG. 1 and FIG. 2, and redundant explanation will be omitted.

FIG. 1 is a plan view schematically showing the main parts of a twin-drum continuous metal strip casting apparatus, and FIG. 2 is a sectional view of a pressing cylinder.

In FIG. 1, reference numeral 3 denotes pressing cylinders that press the same parts of both side weirs 102 as in the conventional device, respectively.
A servo valve 11 is connected to each of the pressure cylinders 3, and the servo valve 11 is connected to a hydraulic pressure generator and a control panel 12 (not shown).

As shown in FIG. 2, the pressing cylinder 3 is composed of a cylinder 3a and a plunger 3b that can slide inside the cylinder 3a, and the inner peripheral surface of the cylinder 3a is provided with a primary excitation coil and a secondary induction coil, for example. A known position sensor 5 such as the one described above is embedded, and this position sensor 5 is connected to a control panel 12. Furthermore, a known target 6, in which, for example, magnetic materials and non-magnetic materials are alternately arranged side by side at equal pitches in the axial direction, is embedded in a portion of the outer circumferential surface of the plunger 3b that faces the position sensor 5. The plunger 3b and the cylinder 3a form a hydraulic chamber a and a pullback hydraulic chamber.

In this embodiment configured as described above, when continuous casting of the metal strip S is started by supplying the molten metal R to the oil reservoir formed by both the cooling drums 101 and the refractory 102a, the refractory 102a are pressed against the seal part 101a by each pressing cylinder 3 with the minimum necessary pressure, so the rotation of the cooling drum 101 and the vibration of the side weir 102 cause the plungers 3b to slide against the seal part 101a and wear out. is moved toward the cooling drum 101 by the amount of wear due to the pressure in the hydraulic chamber a. The control panel 12 constantly detects the amount of movement of the plunger 3b, that is, the target 6, by the transmission from the position sensor 5, and when a difference occurs in the amount of movement of each plunger 3b, the servo valve 11 detects the amount of movement of the pressing cylinder 3. Hydraulic pressure is supplied to the hydraulic chamber a to move each plunger 3b, thereby controlling the side weir 102 to move in parallel.

Thereby, uneven wear of the refractory 102a can be prevented.

Next, other embodiments of the present invention will be described.

The cooling drum 101 of the apparatus of the above embodiment is equipped with a drum rotation speed detector (not shown) and connected to the control panel 12.

The other configurations are the same as those of the previous embodiment.

In this example, first, 10 refractories per drum rotation speed are used.
The amount of wear 2a is calculated and input into the control panel 12 in advance. The drum rotation speed detector detects the rotation speed of the cooling drum 101 and transmits it to the control panel 12 . The control panel 12 controls the plungers 3b by the servo valve 11 so that each plunger 3b moves toward the cooling drum by the amount of wear of the refractory 102a for each rotation of the cooling drum 101, for example.
is controlled so that the side weir 3 moves in parallel to prevent uneven wear of the refractory 102a.

〔Effect of the invention〕

As explained above, in the present invention, each pressing member of the side weir pressing device is provided with a pressing amount control means, and the side weir is moved in parallel to the cooling drum, thereby reducing the amount of wear on the fireproof surface of the side weir. It becomes possible to control evenly,
This uneven wear can be prevented.

Therefore, the life of the refractory surface of the side weir is extended, and the side weir can be used continuously for a long time, so that the amount of continuous casting can be increased.

[Brief explanation of drawings]

FIG. 1 is a plan view schematically showing the main parts of a twin-drum continuous metal strip casting machine as an embodiment of the present invention, FIG. 2 is a cross-sectional view of a pressing cylinder, and FIG. FIG. 4 is a perspective view schematically showing the main parts of the drum-type metal strip continuous casting apparatus, and FIG. 4 is an enlarged and partially cutaway side view of the main parts of FIG. 3... Pressing cylinder, 3a... Cylinder. 3b...Plunger, 5...Position sensor. 6...Target, 11...Servo pulp. 12... Control panel, 101... Cooling drum. 101a... Seal part, 102... Side weir. 102a... Refractory. R...Molten metal. S...Metal band plate. agent

Claims (1)

[Claims] Molten metal is supplied to a pool formed by a pair of rotating cooling drums and a pair of side weirs pressed against both end surfaces of the cooling drum by a side weir pressing device equipped with a plurality of pressing members. 1. A side weir pressing device for a twin-drum continuous casting device, characterized in that each of the pressing members is provided with a pressing amount control means, in the device for continuously casting metal strips.