JPS63149049A - Shifting mold type continuous casting machine - Google Patents

Abstract

PURPOSE:To prevent the breakage of a tundish nozzle and the leakage of molten metal by shifting the tundish nozzle together with a tundish and adjusting as shifting the tundish nozzle to block molds at a fixed interval by a position adjusting device. CONSTITUTION:The shifting molds arranging plural block molds 8 at upper side and lower side as facing to each other, is shifted to ward the same direction and by inserting the tip part of tundish nozzle 6 for the end part of tundish 1 into the mold space continuously formed, molten metal is supplied. In the shifting mold type continuous casting machine having the above constitution, the intervals S1, S2 between the tundish nozzle 6 and block mold 8 are measured by a displacement gage 7. The deviation between the measured value and the setting value S from the setting device 10 is found by a comparator 1. Based on a signal of the deviation, the position adjusting device 3 is worked through servo valve 5. In this way, the tundish 1 on the base 2 is shifted to adjust the position of tundish nozzle 6 and to keep the above intervals S1, S2 constant.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a continuous moving mold casting machine that is capable of maintaining a constant distance between a tundish nozzle and a block mold in the continuous casting machine. It is something.

[Prior Art] Generally, a moving mold type continuous casting machine forms a mold by connecting a large number of block molds supported by a carrier body in an endless track and wrapping them around a fixed frame, and then combining the molds vertically to create a mold space. , a tundish nozzle is inserted into one opening in the mold cavity IUI, molten metal is supplied from the tundish nozzle, and the mold and solidified slab are continuously moved toward the other opening end. Casting is performed on a regular basis.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional moving mold type continuous casting machine, if there is a manufacturing error in the block mold, or if thermal deformation, rattling, vibration, etc. occur in the block mold during operation. In such a case, the block mold may come into contact with the tundish nozzle inserted into the mold space and the tundish nozzle may be damaged, or the gap between the tundish nozzle and the block mold may be wide, causing molten metal to leak. Something happened.

In view of the above-mentioned circumstances, the present invention provides a moving mold type continuous casting machine that prevents damage to the tundish nozzle and leakage of molten metal by keeping the distance between the tundish nozzle and the block mold constant. The purpose is to

[Means for Solving the Problems] The present invention provides upper and lower moving molds in which a plurality of block molds are supported by a carrier body and are arranged in an endless manner, and are disposed facing each other, and the moving molds are moved in the same direction from the opposing portions. A continuous mold space is formed by moving along the fixed frame, and molten metal is supplied into the mold space from a tundish nozzle at the tip of the tundish inserted on the upstream side of the mold space, and the molten metal is poured into the block mold. A moving mold type continuous casting machine that casts slabs by cooling and solidifying the tundish, a position adjustment device that moves the tundish nozzle together with the tundish and maintains a constant distance between the tundish nozzle and the block mold, and the tundish nozzle. a displacement meter for measuring the distance between the tundish and the block mold, a setting device for setting the distance between the tundish and the block mold to a constant value, a comparator for taking the deviation between the numerical values of the displacement meter and the setting device, and a signal from the comparator. A control valve is provided to operate the position adjustment device and adjust the position of the tundish nozzle based on the above-mentioned conditions, thereby making it a moving mold type continuous casting machine.

[Function] Therefore, in the present invention, when the distance between the tundish nozzle and the block mold changes, the displacement meter attached to the tundish nozzle or the block mold sends the distance between the block mold and the tundish nozzle to the comparator, and the comparator Then, the value from the displacement meter is compared with the value preset on the setting device, and the deviation is sent to the control valve.The control valve operates the position adjustment device based on the signal from the comparator to adjust the distance between the tanditsch nozzle and the block mold. keep constant.

The position of the tundish nozzle is adjusted separately in the vertical direction and the horizontal direction.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are explanatory diagrams of an embodiment of the present invention.

■ is a kundishu that supplies molten metal, 2 is a pedestal that fixes the kundishu 1, and 3,3° is a position adjustment device such as a cylinder that is pivotally attached to the pedestal 2 and moves the kundishu 1 together with the pedestal 2 in the horizontal or vertical direction. , 4,4° is the hydraulic piping of the position adjustment device 3.3°, and 5.5° is the hydraulic pipe provided between the hydraulic piping 4,4゛ to control the flow rate of pressurized oil sent to the position adjustment device 3.3". 6 is the tundish nozzle at the tip of the tundish, 7, 7° is a displacement meter such as an eddy current type installed on the tundish nozzle 6, and 8 is a continuous track on the upper and lower surfaces of the upstream end. A large number of block molds into which the tundish nozzle 6 can be inserted into the upper and lower gaps, 9 a roll for driving the block mold 8, lO,l (1° sets the distance between the tundish nozzle 6 and the block mold 8) The setting device 11.11' is a comparator that compares the value from the displacement meter 7, 7° with the value from the setting device 10.10', takes the deviation, and sends it to the servo valve 5, 5°.

As shown in FIG. 1, when the distance between the tundish nozzle 6 and the block mold 8 changes in the left-right direction, if S+ <SO3: and the distance becomes narrower than the set value S and becomes Sl, The gap S1 detected by the displacement meter 7 is sent to the comparator 11, and the comparator compares Sl sent from the displacement meter 7 with S set by the setting device 10, and ΔS=S+S is determined by the servo. The servo valve 5 operates the position adjustment device 3 according to the magnitude and sign of AS. In this case, since AS<O, the loft of the position adjustment device 3 is extended and the tundish 1 is pushed out together with the base 2. Also, when the interval becomes wider than the set value S and becomes S2, the displacement meter 7 or S2 is sent to the comparator 11.
Then, compare S2 sent from the displacement meter 7 and S set by the setting device 10, send As-32-3 to the servo valve 5, and the servo valve 5 adjusts the loft of the position adjustment device 3 due to JS>O. Pull back the tandish 1 together with the pedestal 2.

As described above, the position of the tundish nozzle 8 is constantly adjusted in the left-right direction depending on the condition of the block mold 8.

Figure 2 shows a case where the same mechanism as in Figure 1 is provided to adjust the position of the tundish nozzle 6 in the vertical direction. The interval of 8 is kept constant.

By combining the configurations shown in FIGS. 1 and 2, accidents such as damage to the kundish nozzle 6 due to contact with the block mold 8 and molten metal caused by the gap between the tundish nozzle 6 and the block mold 8 widening are possible. Leakage is prevented.

Note that the present invention is not limited to the above-described embodiments, and that the position adjustment device such as a cylinder, the displacement meter, and the servo valve can be replaced with other equipment having the same type of function. Of course, various changes can be made without departing from the spirit of the invention.

[Effects of the Invention] As described above, according to the moving mold continuous casting machine of the present invention,
Various excellent effects can be achieved, such as preventing damage to the tundish nozzle and molten metal leakage caused by a change in the distance between the tundish nozzle and the block mold.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of one embodiment of the present invention, and FIG. 2 is a partially cutaway side view of one embodiment of the present invention. In the figure, 1 is a kundish, 2 is a stand JM, 3.3° is a position adjustment device, 5,5° is a servo valve, 6 is a tundish nozzle, 7,7° is a displacement meter, and 8 is a fu. Tsuku mold, lO, I
OMt setter, 11.11' indicates a comparator.

Claims (1)

[Claims] 1) By supporting a plurality of block molds on a carrier body and arranging upper and lower movable molds facing each other in an endless series, and driving the movable molds along a fixed frame so that the opposing parts move in the same direction. A continuous mold space is formed, molten metal is supplied into the mold space from a tundish nozzle at the tip of the tundish inserted on the upstream side of the mold space, and the molten metal is cooled and solidified by a block mold to cast a slab. In a moving mold type continuous casting machine, a position adjustment device that moves the tundish nozzle together with the tundish to maintain a constant distance between the tundish nozzle and the block mold, and a displacement meter that measures the distance between the tundish nozzle and the block mold. a setting device that sets the distance between the tundish and the block mold to a constant value, a comparator that measures the deviation between the numerical values of the displacement meter and the setting device, and actuating the position adjustment device based on a signal from the comparator. A moving mold type continuous casting machine characterized by being provided with a control valve for adjusting the position of a tundish nozzle.