RU2388574C2 - Continuous casting plant with crystalliser for casting liquid metals, particularly steel materials - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to continuous casting of metals. Proposed plant (1) has casting chamber (10) between wide side plates and narrow side plate (13). Narrow plates accommodate piston-cylinder assembly (16) that makes actuator and supports, position of the later being measured by field measuring instruments (13). Note here that measurement data are written as bus signals, via field bus modules (22), into control unit (23) of continuous casting plant (1) and, being processed into control signals, are transmitted back into actuators. To register measurement data directly at crystalliser (6) and process it in-situ, it is proposed to connect appropriate hydraulic cylinder (16a) to gate stand (24) with stationary terminal box (25) for measurement and control signal lines (28). Note here that terminal box (25) is connected to axial controller (30). Field bus module (3) transmits signals from said controller to control device (31).

EFFECT: higher accuracy.

6 cl, 3 dwg

Description

The invention relates to a continuous casting plant with a mold for casting liquid metals, in particular steel materials, with wide side plates forming the casting space, between which are adjustable on both sides to form the width of the workpiece taking into account the shrinkage of the workpiece, narrow side plates, on which respectively two vertically spaced piston-cylinder assemblies are provided as actuators and supports, the position of which is measured by by means of a field measuring device, the measurement data is transmitted via fieldbus modules as a bus signal to the bus line and recorded in the control device of the continuous casting unit and after processing it is transmitted back to the actuators in the form of a control signal.

A continuous casting plant of this kind is known from document WO01 / 94052. A continuous casting installation is described, in which decentralized processing of the measurement results obtained on the mold by means of sensors is carried out, while the characteristics of the casting process by means of a control computer are used to adjust the continuous casting installation. The decentralized reception of the measurement data makes the measurement section more efficient and simplifies the measurement devices, as a result of which the measurement and control data in the cooled fieldbus modules are directly generated on the mold and transmitted as a bus signal to the bus line and recorded and / or processed at least control device for continuous casting.

In order to adjust the piston rod or the hydraulic cylinder articulated on a narrow side plate of the piston rod or variously, various signals that must arise and, accordingly, are transformed near the hydraulic cylinder, must be supplied by electrical communication to the control circuit. The valve stand necessary for adjusting the hydraulic components is generally located on the span frame in the area of the pouring platform or under it (on the so-called solid ground). The control device is usually installed in the area of the casting pad in the control room. For a field device in the mold area, it is important that there is a coupler, since the mold must be quickly removed and reinstalled. Therefore, the measurement data can be sent by field measuring devices only from the mold or from the valve stand to the control circuit. The distance to the control circuit in the control room is still very large, and data from four position sensors, from four control valves in four synchronous-serial interface devices and 12 analog signals must be processed from each mold.

The basis of the invention is the task of recording measurement data in the field of the mold in the cooled field devices and their processing in place.

The task in accordance with the invention is solved by the fact that the hydraulic cylinder included in the piston-cylinder assemblies is respectively connected to a valve stand located in the mold area or controlling the casting process with a stationary terminal box for measurement signal lines and control signals, the terminal box being connected with an axial regulator, from which the fieldbus module sends signals to the programmable control device. The advantages are achieved due to the low cost of laying the cable with shorter distances between the nodes. However, the main advantage is the axial adjuster. Axial controllers are special microprocessor-based circuits that are used to control servo axes. The standard software in the motion control device includes real-time control for axial regulation. The motion control device has, for example, attachment devices for:

- machine or step-by-step position transmitter,

- digital or analog inputs or outputs,

- high speed tires,

- networks.

A ready-to-use motion control device includes a remote control and a data display device (display). Application software is standard and is recorded in a read-only memory device. A motion control device can control several axes (hydraulic piston-cylinder assemblies). Using a graphical menu, the motion control device has the ability to adapt in terms of parameters to the type of axis and to the type of position feedback. Programming is not necessary. Through connection to the fieldbus line, the motion control device maintains the desired setpoint and start-up movement and provides feedback for the higher-level system with the position and status indication. Other advantages result from the fact that the data transfer between the programmable control device and the axial controller is reliable and time-critical.

Applicable software modules can be standardized. The cost of materials, installation and time spent on laying the cable is reduced. Electrical damage is reduced. Maintenance costs are also reduced. Installation and commissioning times are reduced.

Installation and maintenance of electronics is simplified due to the fact that the programmable control device is connected to the fieldbus module by means of a detachable plug connection with an appropriate number of contacts.

The same advantages according to another embodiment are achieved due to the fact that, respectively, positional sensors installed in the hydraulic cylinders are connected via a plug connection to the valve stand on the span frame.

The nodes located near the heating zone are protected according to other signs by the fact that the terminal box in the mold area is cooled inside.

For cooling, it is provided that either air or cooling liquid discharged from the mold is used as the cooling medium.

A possible improvement also lies in the fact that the bus line and the fieldbus module, as well as the lines for the measurement signals and control signals, are physically formed from optical fibers or by means of wireless transmission or infrared technology.

Examples of the invention, which are explained below in more detail, are presented in the drawings, where:

Figure 1 shows a side view of a continuous casting installation with a span frame;

Figure 2 is a vertical cross section of a mold with a regulating device of narrow side plates; and

Figure 3 is a simplified block representation of a mold with a switching circuit.

The continuous casting unit 1 according to FIG. 1 has a supporting roller stand 2, on which a workpiece 7 is cast and supported, cast from liquid steel material 3 coming from the casting ladle 4 through the ladle 5 and mold 6 and cooled from the outside. The support roller stand 2 consists of several, usually up to 15 roller segments 8, of which the first roller segment 8a is surrounded by a steam chamber 9. In front of the steam chamber 9 is a mold 6, a casting space 10, which, according to FIG. 2, consists of two opposite, wide side plates 11 spaced apart by the thickness of the future workpiece 7, between which on both sides to form the width of the workpiece 12, taking into account the shrinkage of the workpiece 7, adjustable narrow side plates 13 are located and on which, for example, respectively two vertically spaced parallel parallel mounting blocks 14 are seen. Between the mounting blocks 14, control devices 15 are located on both sides, which have hydraulic piston-cylinder assemblies 16. The mounting blocks 14 include springs 17 inside the clamping block 18 and are supported on brackets 19 that are mounted on the support frame 20. The piston-cylinder assembly 16 is simultaneously an actuator and a support. The position of both piston-cylinder assemblies 16 with their hydraulic cylinders 16a is recorded by means of field measuring devices 21, which consist, for example, of installed position sensors 21a, synchronizing means for the left and right sides, for top and bottom, for the state of the sensors, mold encoding, service cycles and the like. The obtained measurement data is transmitted through the corresponding fieldbus modules 22 in the form of bus signals to the bus line 22a and is recorded in the casting control device 23 of the continuous casting unit 23, sent through a valve stand 24 with a stationary terminal box 25, and after processing are transmitted back as signals control to the actuators, that is, for example, to the hydraulic cylinders 16a. The control device is located in the control room 26, rigidly connected to the span frame 27.

Hydraulic cylinders 16a are connected to the valve stand 24 near the mold 6 or the casting control device 23. The valve stand 24 can also be located near the control room 26 (see Fig. 1). Valve stand 24 includes a terminal box 25 to which lines 28 are connected for measurement signals and control signals. The lines 28 for the measurement signals and control signals are provided with plug-in connections 29. The signals coming from the valve stand 24 are processed in the connected axial controller 30 and transmitted to the programmable control device 31 located in the control room 26 through the fieldbus module 22.

The circuit blocks are again simplified again in FIG. 3 for an embodiment of actuators and supports (hydraulic cylinders 16a). The dividing line 32 shows the proximity of the valve stand 24 and the terminal box 25 to the axial regulator 30, and the measurement data obtained from the hydraulic cylinders 16a are routed through the plug connections 29 to the axial regulator 30 and sent through the fieldbus module 22 to a non-remote programmable control device 31 in the control Indoor 26.

LIST OF REFERENCE POSITIONS

1 - continuous casting installation

2 - supporting roller stand

3 - steel material

4 - casting bucket

5 - bucket

6 - mold

7 - blank

8 - roller section

8a - the first roller section

9 - steam chamber

10 - mold casting space

11 - wide side plate

12 - workpiece width

13 - narrow side plate

14 - mounting block

15 - regulating device

16 - the piston-cylinder assembly

16a - hydraulic cylinder

17 - spring

18 - clamping unit

19 - bracket

20 - supporting frame

21 - field measuring device

21a - integrated position sensor

22 - fieldbus module

22a - bus line

23 - control device for the casting process

24 - valve stand

25 - terminal box

26 - control room

27 - span frame

28 - line measuring signals and control signals

29 - detachable contact connection

30 - axial regulator

31 - programmable control device

32 - dividing line

Claims (6)

1. Installation (1) for continuous casting, containing a mold (6) for casting liquid metals, in particular steel materials, with wide side plates (11) forming the casting space (10), between which width-adjustable (12) are located on both sides (12) ) the workpiece, taking into account the shrinkage of the workpiece (7), narrow side plates (13) on which there are respectively two vertically spaced piston-cylinder assemblies (16) as actuators and supports, the positions of which are measured by field measurements instruments (21), while the measurement data in the form of bus signals are transmitted through the field bus modules (22) to the bus line (22a) and recorded in the continuous casting process control device (23) and, after processing, in the form of control signals are transmitted back to the executive bodies, characterized in that the hydraulic cylinders (16a) of the piston-cylinder assemblies (16) are respectively connected to the valve stand (24) located in the area of the mold (6) or in the area of the device (23) for controlling the continuous casting process molecular terminal box (25) with lines (28) for measuring signals and control signals, wherein the terminal box (25) is associated with the axial control (30) by which the module (22) Fieldbus sends signals to a programmable control unit (31). 2. Installation according to claim 1, characterized in that the programmable control device (31) is connected to the fieldbus module (22) via a plug-in connector (29) with an appropriate number of contacts. 3. Installation according to claim 1 or 2, characterized in that, respectively, positional sensors (21a) installed in the hydraulic cylinders (16a) are connected via a plug connection (29) to the valve stand (24) on the span frame (27). 4. Installation according to claim 1, characterized in that the terminal box (25) located in the area of the mold (6) is cooled inside. 5. Installation according to claim 1 or 4, characterized in that air or a cooling liquid discharged from the mold (6) are used as a cooling medium. 6. Installation according to claim 1, characterized in that the bus line (22a) and fieldbus module (22), as well as lines (28) for measurement signals and control signals, are physically formed on the basis of optical fibers or wireless transmission, or infrared technology.

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