SU1236284A1 - Self-adjusting standardization device for keeping the given reheat temperature of rolled stock at output of continuous furnace - Google Patents

Description

2. An apparatus according to claim 1, characterized in that the constant heating time correction unit for rolling includes a constant heating time correction unit for the next rental, memory register, a heating time deviation detection node, to the inputs of which the temperature sensor at the furnace output is connected the outputs of the software master unit, and the output is connected to the node

one

The invention relates to devices for controlling and controlling the temperature of the material being heated, mechanically transported in furnaces, and is focused on the technology of single piece heating of rolls in the furnace.

The purpose of the invention is to improve the accuracy of heating.

The drawing shows a functional diagram of the proposed device.

The self-adjusting device for standardization of heating of rolled products in a continuous furnace contains two temperature sensors 1 and 2 installed at the inlet and outlet of the continuous furnace 3, unit 4 for determining the current rental temperature, to the inputs of which temperature sensor 1 is connected, generator output 5 time intervals and output of correction unit 6 constant heating time of the rolled product (T, - + I), software driver unit 7 for entering the furnace effective temperature settings (Teff) and output heating temperature (), comparator 8, to one input of which the output is connected unit 4, and on the other the output of unit 7. In addition, the diagram shows the unit 9 controlling the transport mechanism of the furnace to the input of which the output of the comparator 8 is connected, the counter 10 of the actual heating time, to the input of which the output of the generator 5 and the comparator 8 are connected.

The constant heating time correction unit 6 contains a node 11 for determining the heating time deviation, the inputs of which are connected to the temperature sensor 2, the outputs of the unit 7, and the output of the memory register 2 for setting a constant heating time (T, -). The output of the node 11 is connected to the I-input of the node 13 of the correction of a constant time for heating the c. Of the next roll, to another input of which the output of the counter of the actual heating time is connected, and the output is connected to the memory register 12.

The device works as follows.

The calculation of the temperature of the first rolling, entering the furnace, is carried out by block 4 with a constant time, then

correcting the heating time constant for the next rental, to the other input of which the output of the counter is connected, the output of the constant time correction unit is connected to the memory register, the output of which is connected to the constant time correction node for the next rental, by the heating time deviation determining node.

for example, by the operator or stored in the memory of constants for a given size of rolls

T, - n) T (1) ,, + {Ьф-Т (1) ,,) X

X ti-fi

: i)

whereT, (; + 1) is the temperature of the {j + 1) -th rolling in the furnace after the j-ro time interval;

T (t), -temperature (i + 1) -th of the rolled in the furnace after (J - 1) -th time interval;

At is the value of time intervals;

t, + 1 - constant time, determined by the previous tackle; T "is a constant entered from block 7. Determination of the temperature of rolling start at the inlet temperature T, measured by sensor 1, and is calculated at each interval At defined by generator 5 according to equation (1). The interval At can 6t) iTb is set arbitrarily small, for example, 1 s. The temperature determination is carried out with a constant time m, defined for the previous roll (for the first roll TO). After each interval At in the comparator in, T is compared; (, + 1) with Tdal. After some (previously unknown) number of time intervals, the calculated temperature of the rolled stock in the furnace T / ,, i) Tza.1, and a command is given by the comparator 8 on: transport control 9, i is removed from the furnace. Moreover, in the counter 10, the actual heating time {: +, outputted from the furnace is fixed. The temperature of the heated rolling stock is measured by the sensor 2 and is entered into the node 11, where the deviation of the heating time from the required time is determined when the constant heating time T, 41

MT tla.1 n T; +1 .--,

I eff Gzal

(2)

where Tvykh is the actual output rolled steel temperature from sensor 2; Tzad - constants entered from the software block 7. The error in the output rolled-in temperature indicates a mismatch between the calculated time constant and the actual time. The specified value of the constant heating time for the next roll is determined by the node 13 by the deviation of the heating time coming from the node 11 and the actual heating time coming from the counter 10.,

T; + 2 T; +1 (1 | -), (3)

LF

t, -; v

where t, + |, t, + 2 are constant

heating time of the current and next blanks.

5 Q

five

The corrected value of the constant time t, + 2 enters the memory register 12. When approaching the next runner sensor 1, the process of determining its temperature in the furnace and controlling the transport mechanism begins again.

The use of the invention allows to increase the accuracy of maintaining the output temperature of the rolled at a given level and to accelerate the process of adaptation. The accuracy of maintaining the pre-set bar temperature does not depend on the temperature below the inlet of the furnace. At fixed values of the effective temperature of the furnace and a constant heating time of the rolled product, the failure rate of the output temperature lies within 1 ° C.

Claims (2)

1. A SELF-ADJUSTING STANDARDIZATION DEVICE FOR MAINTAINING A TURNED RENT HEATING TEMPERATURE AT THE OUTLET OF THE FURNACE, containing rolled temperature sensors installed at the inlet and outlet of the furnace, a comparator, the output of which is connected to the control unit of the transport mechanism, a program-programmer, which is connected to the first input of the counter, characterized in that, in order to increase the accuracy of heating, a correction block for the rolling time heating constant and a block for determining the current temperature are introduced into it rental, to the inputs of the correction block of the heating time constant of the rental are connected the temperature sensor of the rental at the furnace outlet, the outputs of the program-setting unit and counter, and the output is connected to the first input of the unit for determining the current rental temperature, the other inputs of which are connected to the rental temperature sensor, at the furnace input - the outputs of the generator of the program-setting unit, the output of the unit for determining the current rental temperature is connected to the first input of the comparator. § and the output of the program-setting unit is to its second input, the output of the comparator is also connected to the second input of the counter. SU „„ 1236284 2. The device according to π. 1, characterized in that the block heating time constant correction unit contains a heating time constant correction unit for the next rental, a memory register, a unit for determining deviations of the heating time, to the inputs of which a temperature sensor at the furnace outlet and outputs of the program-setting unit are connected, and the output is connected to the correction unit for the heating time constant for the next rental, to the other input of which a counter output is connected, the output of the correction unit for the time constant is connected to a memory register, the output of which union of a node correction time constant for the next rolling, the node determining the deviation time of heating.