KR810000574B1 - Measuring apparatus for determining the position of the roller apron of a continuous casting installation - Google Patents

Abstract

The position of a roller apron(1) for a continuous casting machine is determined by providing a number of coordinate measuring points at which there are means to mount plumb lines for projecting the position of measuring points in the X or Z axis into a substantially horizontal measuring plane(7). The plumb lines(11) are calibrated with each having a length in the Y axis corresponding to the distance between the related measuring point(9) and the measuring plane(7). The system can be used to ensure that the correct geometry is maintained even if thermal distortion occurs, thus reducing the risk of fissure formation in the castings.

Description

Measuring device for positioning of roller apron of continuous casting device

1 is a schematic side view of a roller apron of a continuous casting device illustrating the present invention.

2 is a cross-sectional view taken along the line II-II of FIG.

3 is a schematic diagram of an electrical device for monitoring the movement of a vertical line or vertical weight.

The present invention can apply a vertical line projected on the X-axis or the Z-axis into a substantially horizontal measuring plane of the roller apron to the measuring point of the roller apron, and comprises at least partially curved roller apron or strand guide device. A new and improved structure of a measuring device for determining the position of the roller apron of a continuous casting device.

In the continuous casting of metals, especially steel, the exact positioning of the roller apron or strand guide in the secondary cooling section is an absolute prerequisite for obtaining a good casting.

However, during casting, especially when the casting time is long, it is often subjected to heat radiation to change the geometry of the roller apron.

When installing a continuous casting device, especially in the case of a large-size bloom casting device of a flat plate, as a conventional measuring device for stopping the roller apron, a level device, a vertical weight, a water level, and radian calibers are used. The roller apron is checked at regular intervals after the operating time.

Using radian calibres or gauges can only be adjusted in relatively short roller aprons.

With such a caliber, no information about the certainty of the path of the roller apron is obtained at all regardless of the number of parts, and likewise, no information about the stability of the position and size of the base frame and the base is obtained.

Measuring devices for the installation and operation of an arc-shaped continuous casting device consisting of a gauge rotatably installed in the center of an annular arc are already known in the art.

These gauges are equipped with adjustable adjusting pins that can adjust the radius of the strand surface being guided.

This arrangement allows the circular path of the roller apron, in particular its fixed side, to be fully assembled and measured.

In addition, such a measuring device lacks access to essential roller apron elements, and therefore cannot fully adjust the roller apron so that it can always be operated with spray nozzles, hoses, control cylinders and the like. It is likewise impossible to measure in casting operations because of the same reasons and additionally the working conditions and the risk of accidents.

Moreover, this measuring device is obstructive when working with slab or bloom continuous casting machines with a casting radius of 8-15 m conventionally, and also can only be moved as a pulling machine and is also unstable. Under temperature, their lengths are exposed with large variations.

In addition, the use of vertical weights at the measuring points of roller aprons is an old practice when installing continuous casting facilities.

These vertical weights or lines project the position of the measuring point into a horizontal measuring plane whose reference value or magnitude or deviation thereof can be determined on the X or Z axis, respectively.

With a level device, you can determine the position of a measurement point on the y-axis by angle or triangulation.

However, this method of measurement requires a great deal of time when assembling a casting machine.

When the casting machine is already ready for use, the roller apron is surrounded by a spray tube, cover, hose, control cylinder, etc., so that the roller apron can only be measured by indirect measurement. The above-mentioned measuring devices are not capable of quick and accurate inspection of the machine at the repair stage, or permanent monitoring during the casting and downtime, ie, quick and accurate inspection while the machine is cooled or heated.

It is a primary object of the present invention to provide a new and improved structure measuring device for determining the roller apron position of a continuous casting plant, regardless of the drawbacks and limitations of the prior art proposals.

Another more specific object of the present invention is to provide a measuring instrument that can start monitoring the geometry of a curved roller apron from the beginning of the mounting or assembly operation and determining the deviation of its size.

It is an additional object of the present invention to provide a measuring device of a novel structure in which the machine can measure deviations in the geometry of cold, hot or roller aprons.

In order to realize these and other objects of the present invention which will become more apparent from the following description, the present invention provides a roller apron with the number of coordinate measuring points as the distance on the y axis, which is scaled by a vertical line or vertical weight, between the instantaneous measuring point and the measuring plane. Apply accordingly.

With the measuring device of the present invention, starting at the time of assembling the equipment and starting work, the accuracy of the position and specification of the roller apron, the base frame and the foundation can be measured instantaneously or permanently with little difficulty and required cost. Since the roller apron can be obtained very surely by such a measuring apparatus, the quality of a cast strand can be improved.

In addition, the downtime for the purpose of measuring the casting equipment can be reduced or avoided. Vertical weights or vertical and horizontal measuring planes can be selected depending on the construction of the machine. The measuring plane is placed in a free and clean space that can be measured by a level instrument.

If you need to, you can do it one step.

According to another aspect of the present invention, the measuring plane may be disposed in the axial direction of the roller apron in the measuring groove, and the vertical line or the vertical weight may pass through the measuring plane.

If you use a measuring plane, you can increase the certainty of the measurement and at the same time reduce the number of devices in the level.

Even in the case of thermal radiation, the vertical line is formed of a material having low expansion characteristics, typically a low coefficient of thermal expansion, in order to ensure the reliability of the measurement without calculating the expansion of the vertical line.

The present invention also suggests the use of INVAR steel to produce vertical lines or vertical weights.

The path of the roller apron constitutes a curved or arcuate surface.

In order to be able to check these three-dimensional surfaces, it is particularly advantageous for slab casting equipment to arrange measuring grooves on both sides of the roller apron.

According to another advantageous aspect of the present invention, when the measuring grooves arranged on both sides of the roller apron are connected to each other by horizontal grooves, the values indicated by the vertical lines on both sides of the roller apron can be made the same.

In order to protect the permanent arrangement of vertical lines or vertical weights from heat radiation, contamination, etc., it is advisable to place the vertical lines between the measuring points and the measuring grooves in the closed vertical grooves.

By using a fixed set sleeve in the base and marking the reference position of the vertical line on the X axis or the Z axis, respectively, the measurement time can be further shortened.

It is advisable to insert a dust protection pin or stopper into the hole at the coordinate measuring point.

If necessary, the measuring groove may be constructed together with the measuring tunnel.

This makes it easy to work through the measuring tunnel during the casting process.

Instead of instantaneously adjusting the roller apron, the geometry of the strands can be permanently monitored or the deviation can be recorded continuously.

In order to achieve this result, another aspect of the present invention is to install a vertical line as an inductive measuring shear connected to the monitoring device in turn.

Repairs are also recommended to be installed with oscillation or vibration dampers or dampers.

In view of the following detailed description, the present invention will be better understood, and other objects than the foregoing will become apparent.

Hereinafter, with reference to the accompanying drawings will be described in detail.

Referring to the drawings, only those necessary portions of the continuous casting apparatus structure are disclosed in order to simplify the installation so that those skilled in the art can easily understand the basic principles and concepts of the present invention.

1 and 2 show a strand guiding device comprising a roller apron 1 of a curved or circular continuous casting device comprising a recovery calibrator or unit 2 arranged in sequence.

The roller apron 1 is divided into a strand guide element or a roller apron element in the form of a segment 3.

The support or bearing member 4 is connected to the base frame portion 5 in order to make it convenient to use a conventional continuous casting mold, which is not particularly shown.

The foundation frame or foundation frame portion 5, which is divided into three parts or units 5, 5 ', 5', is preserved on the concrete foundation 6 so as not to expand tangentially even under the influence of heat.

The support member 4, the segment 3, and the reclaimer 2 are provided with coordinate measuring points 9.

A graduated vertical line or vertical weight 11 (hereinafter simply referred to as a vertical line) between the instantaneous or suitable measuring point 9 and the horizontal measuring plane 7 is referred to as a coordinate measuring point by a predetermined distance on the y axis according to the roller apron 1. The same applies to (9).

These vertical lines 11 are composed of an Invar steel wire (iron-nickel alloy), and include a dustproof pin 10 installed in the hole 10 ', a measuring cylinder 14 equipped with a graduation table, and a graduation weight 15 (prepared from 3 degrees).

The vertical line 11 extends into the measuring grooves 12 and 12 'and the measuring plane 7 which are arranged laterally of the roller apron 1, respectively.

The measuring grooves 12 and 12 'arranged on both axes of the roller apron 1 are interconnected by the horizontal grooves 13.

These measuring grooves 12 and 12 'can be configured as open grooves or closed measuring tunnels.

In order to protect the vertical line 11, it is preferable to provide a closed vertical groove 16 between the measuring point 9 and the measuring groove 12.

The measuring cylinder 14 projects the actual position of the measuring point on the X axis or the Z axis, respectively.

The relative position is specified by the set sleeve 18 in the measuring grooves 12 and 12 '.

In Fig. 3, the measuring cylinder 14 of the vertical line 11 is provided with an inductive measuring transformer 31 for checking the deviation on the y axis and an inductive measuring transformer 32 for checking the deviation on the X axis.

The measuring transformers 31 and 32 are connected to a monitoring device 33 which is designed to turn on a green light when the roller apron 1 is kept within a predetermined tolerance at the measurement position and to turn on a red light when it exceeds the tolerance.

In order to eliminate vibration or oscillation, the scale weight 15 of the vertical line 11 is provided with a vibration and oscillation damper 34 in the form of an oil tank.

For example, the advantages of the above-described embodiment of the measuring device for determining the position of the strand guide assembly, such as including the roller apron of the continuous casting device, may lead to the following manner of operation of the measuring device.

That is, the method determines the horizontal measurement plane 7 in the direction of the X axis 17 as the level device 20, and the horizontal horizontal axis 22 (ie Z) with respect to the X axis with the level device 21. To determine the measurement plane in the axial direction.

Next, the setting sleeve 18 is mounted on the foundation according to the reference sizes of the X-axis and Z-axis.

By comparing the position of the measuring cylinder 14 with the position of the setting sleeve 18, the deviation in these two axes can be determined visually or by the inductive measuring transformers 31 and 32.

The deviation on the y axis 8 can be determined by the level device 20 or with the aid of the inductive measuring transformer 31 as the vertical position of the grid in the measuring cylinder 14 of the vertical line 11.

In addition, despite the use of the level apparatus 21, the positions of the coordinate measuring points of the opposite sides of the roller apron 1 can be compared and the deviation can be determined.

The use of this measuring device is not limited to the case of arc-shaped or curved continuous casting apparatuses, and may be advantageously used in the case of vertical casting apparatuses in which curved roller aprons are installed.

Finally, it will be understood that the terms “X-axis and Z-axis” as used in the present specification and claims may be used in connection with each other where they can be interchangeably used in practice.

What is shown and described is only the preferable embodiment of this invention, It is not limited to that, It can implement in various range within the Claim of this invention.

Claims (1)

At least one partially curved roller apron is installed, and means are provided for supporting the roller apron, which has been posted on a foundation that actually defines the horizontal measuring plane, into a substantially horizontal measuring plane that has posted the position of the measuring point. A number of coordinate measuring points are included in the posted apron, with means for mounting a vertical line for projection on the X-axis or Z-axis, which is a graduated vertical line applied by the electrical number of coordinate points along the roller apron. And a vertical line whose length is on the y-axis corresponding to the required distance between the measuring point and the measuring plane concerned.

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