A system and method for regulating rolling pace of a split roller table

Abstract

The application discloses a method for regulating rolling rhythm of a steel separating roller table and relates to conveying device control technology. Actual interval time of steel biting start and stop on a rolling line is obtained; when accumulated steel throwing time is equal to intermediate rolling single line interval time, a hot detection signal of the rolling line is read, time interval of steel throwing and steel biting in the rolling line is judged, and steel taking time is adjusted; according to a ratio relationship between the actual interval time and the intermediate rolling single line interval time, delay time is obtained; a difference between actual time interval of steel throwing and steel biting of the rolling line and the intermediate rolling single line interval time is obtained, and is used as a corrected setting time; a difference between the intermediate rolling single line interval time and the corrected setting time is obtained, and is used as a corrected interval time; and the intermediate rolling single line interval time is replaced by the corrected interval time. The application further discloses a system for regulating rolling rhythm of a steel separating roller table. The application realizes stable and controllable intermediate rolling steel biting interval, and can efficiently and stably improve yield; reduces equipment idle rate, and reduces ton steel consumption.

Description

Technical Field

[0001] The present invention relates to a conveying device control technology, and more particularly, to a system and method for regulating and controlling the rolling rhythm of a steel separation roller table. Background Art

[0002] In the dual-high-speed rolling process, the steel roller between the roughing and intermediate rolling is used to simultaneously roll the workpiece on two separate rollers, A and B. By controlling the residence time of the workpiece on the A and B rollers, the temperature of the workpiece entering the intermediate rolling can be controlled, which plays a significant role in controlling the head temperature of the workpiece and increasing production capacity. Currently, the rolling rhythm is mainly adjusted by setting the interval between the two roughing and intermediate rolling stages. However, this rolling rhythm control method, which controls the process from the source, has a long process flow due to the numerous process variables and the overly simplistic approach. It has little effect on the final actual results and suffers from the following two drawbacks:

[0003] First, when the two steel rhythms are separated for too long, the equipment idle rate is high, the hourly output is low, and a waste of production costs is caused;

[0004] Second, when the time difference between the two steel rhythms is short, continuous steel rolling will occur, and the billet will follow too closely, which will cause steel piling, production interruption, and downtime losses.

[0005] Therefore, studying how to accurately control the rolling rhythm has high research value for improving production capacity and reducing costs. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the deficiencies of the existing technology and provide a system and method for regulating the rolling rhythm of the steel roller, thereby realizing the intelligent correction of the rolling interval time, and finally achieving the controllable rhythm of the steel bite spacing of the heating furnace.

[0007] The method for regulating the rolling rhythm of a steel separation roller table according to the present invention comprises the following steps:

[0008] Step 1: Obtain the actual interval time between the start and end of steel biting on the rolling line;

[0009] Step 2: Set the interval time of the intermediate rolling line; when the rolling line throws steel, start timing to obtain the throwing time; when the throwing time is equal to the intermediate rolling line interval time, read the heat detection signal of the rolling line; determine the time interval between throwing steel and biting steel in the rolling line according to the heat detection signal, and obtain the waiting time;

[0010] Step 3: adjusting the steel request time according to the difference between the current steel request time and the waiting time;

[0011] Step 4: according to the ratio between the actual interval time and the intermediate rolling single line interval time, a delay time is obtained to control the delayed action of starting and stopping the steel separation roller table;

[0012] Step 5: obtaining the actual time interval between steel throwing and steel biting of the rolling line; and obtaining the difference between the actual time interval and the single-line interval time of the intermediate rolling mill as the corrected set time;

[0013] Step 6: Obtain the difference between the intermediate rolling single line interval time and the corrected set time as the corrected interval time; and replace the intermediate rolling single line interval time with the corrected interval time.

[0014] When the steel throwing time is equal to the intermediate rolling single line interval time, if the rising edge of the thermal detection signal is not generated, the distance between the thrown steel and the biting steel in the rolling line is greater than the preset distance; and the time between the time when the steel throwing time is equal to the intermediate rolling single line interval time and the time when the rising edge of the thermal detection signal is generated is obtained as the waiting time.

[0015] In step 4, when the intermediate rolling line interval time is greater than or equal to the actual interval time, the difference between the intermediate rolling line interval time and the actual interval time is used as the delayed start time to control the delayed start of the steel separation roller table of the rolling line.

[0016] In step four, when the intermediate rolling single line interval time is less than the actual interval time, the difference between the actual interval time and the intermediate rolling single line interval time is used as the delayed stop time; when the rising edge of the thermal detection signal is generated, the steel separation roller is stopped after delaying for half of the delayed stop time.

[0017] After the steel separation roller stops, the steel separation roller is restarted to rotate and bite the steel after delaying for half of the delay stop time.

[0018] A system for regulating the rolling rhythm of a steel roller table, comprising:

[0019] Hot metal detector, used to detect whether there is high-temperature metal on the rolling line and generate a heat detection signal;

[0020] Timer, used to time the time interval between throwing and biting steel on the rolling line, the generation and termination of the biting steel signal, and the generation time of the rising edge of the heat detection signal;

[0021] A controller is used to control the operation of the steel roller table of the rolling line by applying the method for regulating the rolling rhythm of the steel roller table.

[0022] Beneficial effects

[0023] The advantages of the present invention are: by adding the detection and judgment of the steel throwing signal and the steel biting signal obtained by the hot metal detector, and completing the corresponding signal comparison processing through multiple timers, the tracking accuracy and stability of the steel part signal are improved; and the intelligent correction of the rolling interval time is realized, and the heating furnace steel-requiring time finally reaches the controllable rhythm of the medium rolling steel biting interval. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a flow chart of the method for regulating the rolling rhythm of the steel roller table according to the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the embodiments, but this does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0026] See Figure 1 A method for regulating the rolling rhythm of a steel roller table of the present invention includes the following steps.

[0027] Step 1. Obtain the actual interval time T0 between the start and end of steel biting on any rolling line. The steel biting time can be obtained by timing the rising edge signal of the heat detection signal of the hot metal detector. The hot metal detector uses optical signal elements to irradiate a local area at a long distance without contact to detect whether there is high-temperature metal in the area. It is a sensor that detects whether there is hot metal. The rising edge signal generated by it is a signal generated by the high-temperature metal being recognized by the sensor. It is continuous (greater than 20S). The PLC program is executed in a cycle (50ms). Under the triggering of this continuous signal, the same steel piece will be counted multiple times by the PLC program (20*1000ms / 50ms) to generate a total count until the heat detection signal is reset and the counting stops.

[0028] Specifically, when the hot metal detector generates a rising edge, the timer is triggered. The initial value is simultaneously assigned to memory. When the heat detection signal is reset, the timer stops. The difference between the measured time and the initial value is calculated to obtain the actual interval time, T0.

[0029] Step 2. Set the intermediate rolling single line interval time T1 through the human-machine interface of the main console. After the rolling line throws steel, the timer starts timing to obtain the throwing time of the rolling line. When the accumulated throwing time is equal to the intermediate rolling single line interval time T1, read the thermal detection signal of the rolling line; judge the time interval between throwing steel and biting steel in the rolling line according to the thermal detection signal. When the throwing time is equal to the intermediate rolling single line interval time T1, if the rising edge of the thermal detection signal is not generated, it means that the distance between the throwing steel and biting steel in the rolling line is greater than the preset distance, that is, the distance between the two steels on the rolling line is too far. Therefore, it is necessary to obtain the time between the time when the throwing time is equal to the intermediate rolling single line interval time T1 and the time when the rising edge of the thermal detection signal is generated, as the waiting time T2, which is used to subtract the time that can be used to request steel from the heating furnace. Among them, the current steel request time is set to T4.

[0030] Steel throw is the opposite of steel signal detection. When the hot metal detector detects the absence of rolled material and the mill torque in the rolling line drops suddenly by more than 30% for 300 milliseconds, the current rolling line is considered to have completed steel throw, indicating that the rolled material has passed through the current rolling line. This phenomenon, caused by the sudden disappearance of a heavy load, is called steel throw.

[0031] Regarding the steel request time, it is the steel-out rhythm time, that is, the signal interval time when the rolling line requests raw materials from the heating furnace. The shorter the interval time, the more steel can be output per unit time from the heating furnace.

[0032] Step 3: Adjust the steel demand time based on the difference between the current steel demand time T4 and the waiting time T2. The adjusted steel demand time T3 = T4 - T2. Starting from the adjusted steel demand time T3 = T4 - T2, the heating furnace accelerates the steel tapping rhythm, ensuring that after the steel is discharged in step 2, when the accumulated time equals T1, the hot metal detector has detected that the rolled piece is in place, that is, the heat detection signal is on the rising edge.

[0033] Step 4: According to the ratio between the actual interval time T0 and the intermediate rolling single line interval time T1, the delay time is obtained to control the delayed action of starting and stopping the steel separation roller.

[0034] Specifically, in step 4, when the intermediate rolling line interval time T1 is greater than or equal to the actual interval time T0, the difference between the intermediate rolling line interval time T1 and the actual interval time T0 is used as the delayed start time T5 to control the delayed start of the steel separation roller of the rolling line.

[0035] If the intermediate rolling line interval time T1 is less than the actual interval time T0, the difference between the actual interval time T0 and the intermediate rolling line interval time T1 is used as the delayed stop time T6. When the rising edge of the heat detection signal is generated, the steel separation roller is stopped for half of the delayed stop time T6. After the steel separation roller stops, it is restarted for half of the delayed stop time T6 to bite the steel.

[0036] Step 5: Obtain the actual time interval T7 between the steel throwing and steel biting of the rolling line through the timer. Obtain the difference between the actual time interval T7 and the single-line interval time T1 of the intermediate rolling line as the corrected set time T8.

[0037] Since the roller conveyor has a low-speed start-stop time, T7-T1=T8 is a positive number. The corrected set time T8 is used as the next step to optimize the start-stop waiting time.

[0038] Step 6: Obtain the difference between the intermediate rolling single line interval time T1 and the corrected set time T8 as the corrected interval time T9. That is, T1-T8=T9. Replace the intermediate rolling single line interval time T1 with the corrected interval time T9.

[0039] A system for regulating and controlling the rolling rhythm of a steel roller table comprises a hot metal detector, a timer and a controller.

[0040] Among them, the hot metal detector is used to detect whether there is high-temperature metal on the rolling line and generate a heat detection signal.

[0041] The timer is used to measure the actual interval time T0, the steel throwing time, and the actual time interval T7.

[0042] The controller is used to control the operation of the steel roller table of the rolling line by applying an ascending method for regulating the rolling rhythm of the steel roller table.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A method for regulating the rolling rhythm of a steel roller table, characterized in that: The following steps are involved: Step 1: Obtain the actual interval time between the start and end of steel biting on the rolling line; Step 2: Set the single-line interval time for intermediate rolling; After the rolling line throws steel, the timing is started to obtain the throwing time; when the throwing time is equal to the single-line interval time of the intermediate rolling, the heat detection signal of the rolling line is read; The time interval between steel throwing and steel biting in the rolling line is determined according to the heat detection signal, and the waiting time is obtained, specifically: When the steel throwing time is equal to the intermediate rolling single line interval time, if the rising edge of the heat detection signal is not generated, the distance between the thrown steel and the biting steel in the rolling line is greater than the preset distance; and the time between the time when the steel throwing time is equal to the intermediate rolling single line interval time and the time when the rising edge of the heat detection signal is generated is obtained as the waiting time; Step 3: adjusting the steel request time according to the difference between the current steel request time and the waiting time; Step 4: according to the ratio between the actual interval time and the intermediate rolling single line interval time, a delay time is obtained to control the delayed action of starting and stopping the steel separation roller table; Step 5: obtaining the actual time interval between steel throwing and steel biting of the rolling line; and obtaining the difference between the actual time interval and the single-line interval time of the intermediate rolling mill as the corrected set time; Step 6: Obtain the difference between the intermediate rolling single line interval time and the correction set time as the correction interval time; The intermediate rolling single line interval time is replaced by the corrected interval time.

2. The method for regulating the rolling rhythm of a steel separation roller table according to claim 1, characterized in that: In step 4, when the intermediate rolling line interval time is greater than or equal to the actual interval time, the difference between the intermediate rolling line interval time and the actual interval time is used as the delayed start time to control the delayed start of the steel separation roller table of the rolling line.

3. A method for regulating the rolling rhythm of a steel roller table according to claim 1 or 2, characterized in that: In step four, when the intermediate rolling single line interval time is less than the actual interval time, the difference between the actual interval time and the intermediate rolling single line interval time is used as the delayed stop time; when the rising edge of the thermal detection signal is generated, the steel separation roller is stopped after delaying for half of the delayed stop time.

4. The method for regulating the rolling rhythm of a steel separation roller table according to claim 3, characterized in that: After the steel separation roller stops, the steel separation roller is restarted to rotate and bite the steel after delaying for half of the delay stop time.

5. A system for regulating the rolling rhythm of a steel roller table, characterized in that: include, Hot metal detector, used to detect whether there is high-temperature metal on the rolling line and generate a heat detection signal; Timer, used to time the time interval between throwing and biting steel on the rolling line, the generation and termination of the biting steel signal, and the generation time of the rising edge of the heat detection signal; A controller for controlling the operation of the steel roller table of the rolling line by applying the method for regulating the rolling rhythm of the steel roller table as described in any one of claims 1 to 4.

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