SU984668A1 - Apparatus for automatization of steel casting into ingot mould - Google Patents

Description

(54) DEVICE FOR AUTOMATING THE PROCESS OF STEEL SPRAYING INTO STANDERS

one

The invention relates to the field of automated control and management of production processes and can be applied in ferrous metallurgy in steel-smelting workshops to control the process of steel casting into molds.

A device for automating the process of steel casting is known, which contains sensors for the weight of metal in the ladle, a digital follow-up compensator, logic circuits, and a light board 1.

The closest to the proposed technical entity is a device for weighing and dosing a liquid metal, containing sensors for the weight of the melt in the ladle, an analog-to-digital converter, a control unit, a display unit 2.

A disadvantage of the known devices is that when they are used in steel-smelting shops during the casting of steel into molds, metal is lost in the form of non-equilibrium ingots going to scrap.

The purpose of the invention is to reduce metal losses, in the form of non-balanced ingots going to scrap.

This goal is achieved in that a device for automating the process of steel casting into molds containing melt weight sensors in the ladle, an analog-digital converter, a control unit, a display unit, a casting program task unit, a casting control unit, a corrective action determination unit, The inputs of which are connected to the outputs of the analog-digital converter, the casting program setting unit 10, the casting control unit, and the outputs to the inputs of the display unit and the control unit.

The casting program task block consists of a setter of the nominal dose value, a setter of the type and number of items 15, a setter of the fraction of sclac.

In addition, the corrective action determination unit contains an information processing unit, registers of the set of allowable dose change limits, information input / output sub-unit 20 and digital output sub-unit.

FIG. 1 is a block diagram of a device for automating the process of steel casting into molds; in fig. 2 - scheme

block setting program casting; in fig. 3 is a block diagram for determining the correction of its effect.

The device comprises a melt weight sensor 1 in a ladle, an analog-to-digital converter 2, a control unit 3, a display unit 4, a casting program setting unit 5, a correction action determining unit 6, a casting control unit 7.

The melt weight sensor in the ladle is connected to the input of the analog-digital converter 2. The inputs of the correction influence determination unit 6 are connected to the outputs of the analog-digital converter 2, the casting program setting unit 5, and the connections of the connector 6 to the indication display 4 and control unit 3. The output of the control unit 3 is connected to the input of the casting control unit 7.

The melt weight sensor 1 in the ladle is a commercially available strain gauge sensor, for example, the type TENZELLELL produced by Hungary. Analog-to-digital converter 2 is a serial one, produced by domestic industry, for example, of the PPNK-1 type. The control unit 3 is a typical control scheme for an electro-hydraulic drive of a slide gate of the casting ladle. As an indication unit 4, for example, a device for digital output PVKTS2-4.

Block 5 of the casting program (Fig. 2) consists of a sensor 8 of the reference dose value, unit 9 of the type and number of molds, unit 10 of slag, performed, for example, in the form of commercially available digital signal sensors.

Block 6 for determining the corrective action (Fig. 3) consists of information processing block 11, for example, type MDR1, memory registers 12, allowable dose change limits, for example, type BNOP1, information input / output subunit 13, for example, type BVKU-1, digital output subunit 14, for example, type BVCTSb. For example, the casting control block 7 can be used, for example, the relay contacts block of the electrohydraulic drive control circuit of the pouring gate or limit switches installed on the hydraulic cylinder rod, or the same photocell, svizirovanny on a stream of metal flowing from the bucket.

A device for automating the process of casting steel into molds works as follows.

From the sensor 1 of the melt weight in the ladle, through the analog-digital converter 2, from the casting program setting unit 5 and the casting control unit 7 to the input input subunit 13 of the information block 6, the correction effect is received

The following information: the weight of the melt in the ladle, the nominal dose of the dose, the type and number of molds prepared for casting, the coefficient taking into account the slag fraction in the melt, the signal for opening the gate of the pouring ladle. Based on the values of the melt weight in the ladle, the proportion of slag in the melt specified by the casting operator, information processing unit 11 determines the weight of the plaque and the weight of the metal in the ladle.

Based on the information about the weight of the metal and the signal at the output of the casting control unit 7 about opening and closing the gate of the steel-pouring ladle as a result of logical analysis of the block and processing and shaping the correction effect determining unit 6, calculate the amount of filling molds. Taking into account the amount of metal remaining in the ladle and the number of unfilled molds, information processing unit 11 calculates the amount of deviation of the amount of metal falling on one of the molds relative to the nominal dose value. The magnitude of the deviation is compared by block 11 with the values stored in registers 12–12 of the memory of permissible dose change limits.

If the deviation value is within acceptable limits, the correction influence action block 6 generates a task to the control unit 3 for dose value adjustment and recommendations. The instructions are displayed to the operator by the display unit 4.

If the deviation exceeds the allowable limits, the corrective action determination unit 6 analyzes the possibility of pouring the remaining metal 5 into another type of mold with a smaller or larger weight of ingots. Unit 4 ipdikatsii displays the recommendations for changes in the programm. We casting.

Information about the nominal value of the dose, the type and number of molds, degree 0 of saturation of the melt with slag is entered by the operating personnel before the beginning of the casting of the melt through block 5 of the task of the casting program.

A device for automating the process of casting steel into molds through operative control of the process of casting steel into molds, in particular, changing the weight of the ladle with metal, taking into account the number of molds available, etc., operatively determining the corrective effect of metal radiation reduces and even eliminates metal losses. in the form of non-equilibrium ingots going to scrap.

The invention may be applied in converter, open-hearth electric steel shops, in which the casting is carried out into molds and a certain fluctuation of the weight of the cast ingots relative to the nominal value is allowed.

Claims (3)

1. A device for automating the process of casting steel into molds, containing gauges for the weight of the melt in the ladle, an analog-digital converter, a control unit, an indication unit, characterized in that, in order to reduce metal losses in the form of non-balanced ingots going to scrap, it additionally contains a casting program setting unit, a casting control unit and a correction action determination unit, the first input of which is connected to the output of the analog-digital converter, the second input - to the output of the program setting unit casting, and the third - control unit in a yield of casting, a first output unit for determining exposure correction connected to the input of the indication unit, and the second output - to an input of the control unit, the control unit output is connected to an input of a control block casting. 2. A device according to claim 1, characterized in that the task block of the casting program consists of a unit for setting the nominal dose value, a unit for the type and number of molds, a unit for the slag fraction. 3. The device according to claim 1, characterized in that the block for determining a corrective action comprises an information processing unit, memory registers of permissible limits for dose change, information input / output subunit and digital output subunit. Sources of information taken into account in the examination 1. USSR author's certificate No. 300251, cl. B 22 D 37/00, 1976. 2. USSR author's certificate number 357026, cl. B 22 D 39/00, 1977.