A billet position feedback method

Abstract

The present invention provides a method for steel billet position feedback, comprising the following steps: S1: Set a corresponding schedule for each reheating furnace; S2: Obtain the working state of the pusher of the reheating furnace. When the elevator of the pusher is in the descending state under the condition of automatic steel tapping of any reheating furnace, start all the discharging roller tables and the between-furnace roller tables in front of the reheating furnace, and start timing from the moment when the elevator of the pusher is in the descending state under the condition of automatic steel tapping of any reheating furnace; S3: When the pusher pushes the steel billet to the discharging roller table at the outlet of the reheating furnace, start the discharging roller table at the outlet of the reheating furnace; S4: Judge the position of the steel billet on the transfer roller table according to the schedule and the timing time. The present invention discloses a method for steel billet position feedback. By replacing the hardware physical detection with the software control idea, the present invention achieves the same automatic control effect, reduces the equipment failure rate, reduces the spare part loss, and reduces the safety accidents of the equipment maintenance personnel.

Description

Technical Field

[0001] The present invention relates to the field of hot rolling, and particularly to a method for feedback of the position of a steel billet. Background Art

[0002] Four hot metal detectors (hot checks) are installed on the discharging side of the hot rolling reheating furnace. Their main function is to detect the actual position of the discharged slab, control the automatic start and stop of the discharging roller table, and automatically transmit the discharged slab data to the rough rolling area. Since the temperature on the discharging side of the reheating furnace is relatively high, it is easy to cause malfunctions in hot check signal detection, abnormal automatic operation of the discharging roller table, data disorder and other adverse consequences, affecting normal production. Maintenance personnel are prone to heat stroke and safety accidents when working in a high-temperature environment. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for feedback of the position of a steel billet, which reduces the failure rate during the detection of the position of the steel billet.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A method for feedback of the position of a steel billet, used to monitor the position of the steel billet on a hot rolling production line, including a transfer roller table and a plurality of reheating furnaces. The plurality of reheating furnaces are arranged in sequence along the conveying direction of the steel billet. The transfer roller table includes a discharging roller table at the outlet of the reheating furnace and an inter-furnace roller table between two adjacent discharging roller tables, and includes the following steps: S1: Set a corresponding time schedule for each of the reheating furnaces; S2: Obtain the working state of the pusher of the reheating furnace. When the elevator of the pusher is in the descending state under the condition of automatic steel discharging of any reheating furnace, start all the discharging roller tables and inter-furnace roller tables in front of the reheating furnace, and start timing from the moment when the elevator of the pusher is in the descending state under the condition of automatic steel discharging of any reheating furnace; S3: When the pusher pushes the steel billet onto the discharging roller table at the outlet of the reheating furnace, start the discharging roller table at the outlet of the reheating furnace; S4: Judge the position of the steel billet on the transfer roller table according to the time schedule and the timing time, and shut down the discharging roller table or inter-furnace roller table behind the steel billet.

[0005] Further, the time schedule is the time set for the steel billet output by the reheating furnace to reach each position point starting from the moment when the elevator of the pusher is in the descending state, where the position point is the connection point between the inter-furnace roller table and the discharging roller table.

[0006] Further, the reheating furnace is timed by a timer. When the steel billet moves to the position point, the timer disconnects after a set delay start.

[0007] Further, it further includes a signal acquisition device. The signal acquisition device is connected to the timer, and the signal acquisition device can judge the position of the steel billet according to the on-off state of the timer.

[0008] Furthermore, it further includes a plurality of hot metal detectors, one of which is provided at each of the position points. The hot metal detector is connected to the signal acquisition device, and the hot metal detector can identify the billet on the transfer roller table.

[0009] Analysis shows that the present invention discloses a billet position feedback method. The present invention uses a software control idea to replace the hardware physical detection, achieving the same automation control effect, reducing the equipment failure rate, reducing the spare parts loss, and reducing the safety accidents of equipment maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. Among them:

[0011] Figure 1 The flowchart of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present invention rather than limitation of the present invention. In fact, those skilled in the art will clearly understand that modifications and variations can be made to the present invention without departing from the scope or spirit of the present invention. For example, features shown or described as part of one embodiment can be used in another embodiment to yield yet another embodiment. Therefore, it is desirable that the present invention include such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0013] In the description of the present invention, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "connected", "connected to", and "disposed" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component; it can be a wired connection, a radio connection, or a wireless communication signal connection. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0014] One or more examples of the present invention are shown in the accompanying drawings. The detailed description uses numerical and alphabetical labels to refer to features in the drawings. Similar or like labels in the drawings and the description have been used to refer to similar or like parts of the present invention. As used herein, terms such as "first", "second", "third", and "fourth" are used interchangeably to distinguish one component from another and are not intended to indicate the position or importance of individual components.

[0015] As Figure 1 shown, according to an embodiment of the present invention, a method for feedback of billet position is provided for monitoring the position of billets on a hot rolling production line. The hot rolling production line includes a transfer roller table and a plurality of heating furnaces. The heating furnaces discharge steel billets automatically on time according to a predetermined setting. The plurality of heating furnaces are arranged in sequence along the conveying direction of the billets. The transfer roller table includes a discharging roller table at the outlet of the heating furnace and an inter-furnace roller table located between two adjacent discharging roller tables. During production, the transfer roller table can transfer at most one billet at a time, and the method includes the following steps:

[0016] S1: Set a corresponding schedule for each heating furnace. The schedule is the time for the billet to reach each position point. By means of the schedule, the position of the billet is corresponded to the time after the billet is discharged from the furnace, so as to detect the position of the billet;

[0017] S2: Obtain the working state of the discharging machine of the heating furnace. When the elevator of the discharging machine is in the descending state under the condition of automatic billet discharging for any heating furnace, start all the discharging roller tables and inter-furnace roller tables in front of the heating furnace, and start timing from the moment when the elevator of the discharging machine of any heating furnace is in the descending state under the condition of automatic billet discharging;

[0018] S3: When the discharging machine pushes the billet onto the discharging roller table at the outlet of the heating furnace, start the discharging roller table at the outlet of the heating furnace;

[0019] S4: Judge the position of the billet on the transfer roller table according to the schedule and the timing time, and shut down the discharging roller table or inter-furnace roller table behind the billet. The transfer roller table behind the billet is directly and automatically shut down during the transportation of the billet, thus saving energy consumption.

[0020] Preferably, the schedule is the time for the billet output from the set heating furnace to reach each position point starting from the moment when the elevator of the discharging machine is in the descending state, which is obtained through actual experiments, and the position point is the connection point between the inter-furnace roller table and the discharging roller table.

[0021] Preferably, the heating furnace is timed by a timer. When the billet moves to the position point, the timer disconnects after a set delay is started. The period during which the timer disconnects can enable the signal acquisition device to acquire enough signals to judge the position of the billet.

[0022] Preferably, it further includes a signal acquisition device which is connected to the timer. The signal acquisition device can judge the position of the billet according to the on-off state of the timer. The signal acquisition device adopts a PDA (signal acquisition) curve system to analyze the time variation law of "0" and "1" in the signal Boolean quantity. When the timer is off, the Boolean quantity of the signal is "0", and when the timer is running, the Boolean quantity of the signal is "1".

[0023] Preferably, it further includes a plurality of hot metal detectors, and one hot metal detector is provided at each position point. The hot metal detector is connected to the signal acquisition device, and the hot metal detector can identify and track the actual position of the billet reaching this point on the transfer roller table.

[0024] Taking the hot rolling production line with 3 heating furnaces as an example, the 3 heating furnaces are No. 1 furnace, No. 2 furnace and No. 3 furnace respectively. The original hardware hot detectors on both sides of the steel discharging roller table of No. 1 furnace are HMD201 and HMD101, the original hardware hot detectors on both sides of the steel discharging roller table of No. 2 furnace are HMD102 and HMD103, and the original hardware hot detectors on both sides of the steel discharging roller table of No. 3 furnace are HMD104 and HMD105. The moving direction of the billet is from No. 3 furnace to No. 1 furnace. The fourth step of the automatic steel discharging of the heating furnace is the step when the steel discharging machine is in the descending state. The fifth step of the automatic steel discharging of the heating furnace is that the steel discharging machine pushes the billet to the outlet of the heating furnace. Among them, the hot metal detectors belonging to the steel discharging side of the heating furnace are HMD101, HMD102, HMD103, HMD104.

[0025] When No. 2 furnace and No. 3 furnace automatically discharge steel, the forward rotation control function of the steel discharging roller table at No. 1 furnace was originally controlled by the physical hardware hot detector HMD101 on the steel discharging side. Under the method of the present invention, now when No. 2 furnace automatically discharges steel to the fourth step (software signal), the steel discharging roller table at No. 1 furnace automatically starts to rotate forward; when No. 3 furnace automatically discharges steel to the fourth step (software signal), the steel discharging roller table at No. 1 furnace automatically starts to rotate forward, which is equivalent to the fourth step signal of No. 2 furnace and No. 3 furnace automatically discharging steel controlling the steel discharging roller table at No. 1 furnace to automatically start to rotate forward, so as to achieve the same effect as the hardware hot detector HMD101.

[0026] When No. 2 furnace discharges steel, the slab passes through the hot detectors HMD102 and HMD101 to realize the automatic forward transmission of the discharged billet and discharging data. When No. 3 furnace discharges steel, the billet passes through the hot detectors HMD104, HMD103, HMD102, HMD101 to realize the automatic forward transmission of the discharged steel slab and discharging data.

[0027] The control method of the present invention is that when the automatic steel tapping of the heating furnace reaches the fourth step of sequence control (the steel tapping machine is in the descending state), all the steel tapping roller tables and the roller tables between the furnaces in front of the heating furnace automatically start to operate. When the steel tapping roller table of the heating furnace reaches the fifth step of sequence control (the steel tapping machine pushes the billet to the outlet of the heating furnace) during automatic steel tapping, it automatically starts to run and conveys the billet forward for hot transfer. The automatic control of the steel tapping roller table completely does not require hardware hot detection to collect signals, and retains the priority of manual intervention in the design control.

[0028] Under the condition that the hardware signal of the hot detector is normal, usually through the PDA (signal acquisition) curve system, analyze the time law of "0" and "1" in the Boolean quantity of the hot detector signal. In this application, the timer is used in cooperation with the software processing method to obtain the power-on and power-off signals when the hot detector is triggered at the same time, so as to realize the hot detection in a logical control manner.

[0029] The algorithm hot detection and the physical hot detection signal can be used simultaneously. As long as the production reaches the condition of automatic steel tapping, the algorithm hot detection will be automatically triggered. Even if the hardware hot detection fails, it will not affect the normal production. The maintenance personnel can select the detection method according to the actual situation on site.

[0030] Compared with the prior art, the present invention replaces the hardware physical detection with the software control idea, achieves the same automatic control effect, reduces the equipment failure rate, reduces the spare parts consumption, and reduces the safety accidents of the equipment maintenance personnel.

[0031] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A billet position feedback method for monitoring the billet position in a hot rolling production line, including a transfer roller table and multiple heating furnaces, the multiple heating furnaces are arranged in sequence along the conveying direction of the billet, the transfer roller table includes a billet discharging roller table at the outlet of the heating furnace and an inter-furnace roller table located between two adjacent billet discharging roller tables, and is characterized in that, It includes the following steps: S1: Set a corresponding schedule for each of the reheating furnaces; S2: Obtain the working state of the billet discharging machine of the reheating furnace. When the elevator of the billet discharging machine is in the descending state under the condition of automatic billet discharging for any of the reheating furnaces, start all the billet discharging roller tables and the between-furnace roller tables in front of the reheating furnace, and start timing from the moment when the elevator of the billet discharging machine is in the descending state under the condition of automatic billet discharging for any of the reheating furnaces; S3: When the billet discharging machine pushes the billet to the billet discharging roller table at the outlet of the reheating furnace, start the billet discharging roller table at the outlet of the reheating furnace; S4: Judge the position of the billet on the transfer roller table according to the schedule and the timing time, and shut down the billet discharging roller table or the between-furnace roller table behind the billet; The schedule is the time for the billet output from the set reheating furnace to reach each position point starting from the moment when the elevator of the billet discharging machine is in the descending state, where the position point is the connection between the between-furnace roller table and the billet discharging roller table.

2. The billet position feedback method according to claim 1, wherein The reheating furnace is timed by a timer. When the billet moves to the position point, the timer disconnects after a set delay starts.

3. The billet position feedback method according to claim 2, wherein It further includes a signal acquisition device, which is connected to the timer, and the signal acquisition device can judge the position of the billet according to the on-off state of the timer.

4. A method for feedback of the billet position according to claim 3, characterized in that, It further includes a plurality of hot metal detectors, and one hot metal detector is provided at each position point. The hot metal detector is connected to the signal acquisition device, and the hot metal detector can identify the billet on the transfer roller table.

Images