Control device and control method for automatically matching planned charging of bar heating furnace

Abstract

The invention discloses a control device and a control method for automatically matching planned charging of a bar heating furnace. According to production task requirements of the heating furnace, automatic planned matching and accurate charging of multi-business scene requirements of steel billets can be realized. The system comprises a roller way set provided with a cold detection device and a blank number recognition device, and recognition data can be transmitted to a heating furnace secondary system in real time. A nuclear material allowing signal storage module is additionally arranged in the first-stage control system, and the second-stage control system is synchronously provided with an automatic feeding signal and a blank number recognition input signal. The nuclear material logic adopts priority control, and a multi-signal cooperation mechanism is established, so that the matching difficulty in complex scenes such as empty blank positions, mixed loading of waste steel billets, abnormal blank numbers and the like is effectively solved, and quick charging of the steel billets in cross-business scenes is realized. According to the technology, a traditional manual checking mode is broken through, the charging efficiency is improved, meanwhile, the working intensity of operators is reduced, and the efficient control requirement of modern continuous rolling production is met.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgy and relates to a control device and a control method for automatically matching the charging plan of a bar heating furnace. Background Art

[0002] The raw material of the bar production line is continuous casting billets. To cooperate with the production of the rolling mill, generally only one billet heating furnace is set up in a production line to heat the steel billets before rolling. The expansion of the rolling mill's production capacity also requires a corresponding increase in the output of the supporting heating furnace. Previously, the output of the bar and wire heating furnace was generally between 100 and 140 t / h, and now it has reached 180 to 200 t / h. On the premise that the annual working hours remain unchanged, the increase in the output of the heating furnace will inevitably lead to an accelerated charging and discharging rhythm. These series of changes have put forward new and higher requirements for the charging and discharging rhythm of the heating furnace and the control of the equipment action timing sequence.

[0003] The production characteristics of bar and wire products take the rolling plan batch as the material unit. A rolling batch has several billets of the same specification and steel type. There will be changes in the billet specifications and heating processes between different rolling plan batches. When changing the charging for each rolling plan batch, an idle step operation is required; sometimes 1 to 2 scrap steel billets need to be charged between two rolling plan batches; there is also the verification charging in case of abnormal billet number identification. How to accurately and quickly complete the verification and charging of the steel billets in the unit of the rolling plan batch according to the process rules in the business scenarios with idle steps, charging of scrap steel billets, and abnormal billet number identification is a difficult problem. Currently, the conventional operation for changing the batch number of the rolling plan batch is guarded by manual labor, with a large labor intensity, and often there will be missed idle step operations between two rolling batches, reducing the charging efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a control device and a control method for automatically matching the charging of steel billets in a bar heating furnace in multiple business scenarios according to the charging business requirements of current bar and wire billets, which can realize the automatic charging of multiple business function requirements, ensure that the operator can accurately and quickly verify and charge the steel billets, and improve the charging efficiency and charging accuracy of the heating furnace.

[0005] The technical solution of the present invention: A control device for automatic matching of billets in a bar heating furnace for charging according to a plan, comprising a billet charging roller table system composed of a bar and wire heating furnace and a group of roller tables. A billet number identification device is installed at the inlet end of the roller tables. Each roller table unit is driven by a frequency conversion motor and speed-regulated in sections to ensure accurate centering and positioning of the billets in front of the furnace. It also includes a group of heating furnace inlet roller tables, on which a positioning detection device and a billet number identification device are equipped. A data block DB is set in the primary control system of the heating furnace, and signal points B1 and B2 are set in the secondary control system of the heating furnace. The data block DB in the primary control system is used for the flag of whether the secondary verification is enabled. When the value of the DB block is 1 and remains so, it means that the primary system allows the secondary verification. When the value of the DB block is 0, it means that the primary system does not allow the secondary verification. In the secondary control system of the heating furnace, the two signal points B1 and B2, B1 is used for the flag bit of whether the heating furnace automatically feeds the billets, and B2 is used for the flag bit of whether to use the billet number identification function.

[0006] A control method for automatic matching of billets in a bar heating furnace for charging according to a plan, using the above control device, characterized in that: the DB information has the highest priority. When the value of the DB block is 0, the secondary system does not verify the billets. When the value of the DB block is 1, it allows the verification of the billets. The control process is as follows: 1) The secondary control system of the heating furnace detects the assignment status of the DB block: If the value of the DB block is 0, directly terminate the verification process, and the secondary system does not perform the billet verification. If the value of the DB block is 1, enter the automatic feeding state judgment process and execute step 2). 2) When the value of the DB block is 1, detect the status of signal B1: If B1 = 0, it is in the non-automatic feeding state, and the secondary system does not perform the billet verification, and the process terminates. If B1 = 1, when it is in the automatic feeding state, further detect the status of signal B2 and execute step 3). 3) When B1 = 1: When B2 = 0 and the billet number identification is not enabled, the secondary system directly performs the automatic verification of the billets. When B2 = 1 and the billet number identification is enabled, it is necessary to verify the billet number identification result: If the billet number identification result is correct, the secondary system performs the automatic verification of the billets. If the billet number identification result is abnormal, trigger manual intervention for billet verification.

[0007] The present invention effectively solves the problem of automatic charging in complex scenarios such as empty step billet positions, mixing of scrap billets, and abnormal billet numbers by using the existing devices of the heating furnace and adopting the electrical signal logic method, and by establishing a multi-signal cooperation mechanism. It realizes the automatic matching of the billet plan in the bar heating furnace in multiple service scenarios to complete the charging, effectively improves the steel charging efficiency, and realizes the intelligent execution of the charging plan. Description of the Drawings

[0008] Figure 1 It is a schematic diagram of the logic method device of the present invention.

[0009] Figure 2This is the flow chart of the logic method of the present invention.

[0010] Figure 1 Among them: DB is the data block added in the first-level control system of the heating furnace; P1 to P4 are the billet positioning flag bits on the roller table; A1 to A4 are the front-of-furnace roller tables.

[0011] Figure 2 Among them: DB = 1 is the first-level signal allowing the second-level nuclear material, DB = 0 is the first-level signal not allowing the second-level nuclear material; B1 = 1 is the signal allowing automatic loading, B1 = 0 is the signal not allowing automatic loading; B2 = 1 is the signal using the billet number identification, B2 = 0 is the signal not using the billet number identification. Specific implementation mode

[0012] The following will be described in conjunction with the embodiments of the accompanying drawings.

[0013] Figure 1 As shown: A control device for automatically matching the plan for charging billets in a bar heating furnace includes a bar and wire heating furnace and a feeding roller table system composed of a group of roller tables A1 to A4. A billet number identification device including an integrated optical scanning and radio frequency identification module is installed at the inlet end of the A1 roller table. When the billet is transported to the A1 section by the roller table, the positioning detection device triggers the billet number identification action, and the unique billet number obtained by scanning is transmitted to the second-level control system of the heating furnace through the industrial Ethernet. Each roller table unit (A1 - A4) is driven by a frequency conversion motor and has a segmented speed regulation function to ensure accurate centering and positioning of the billet in front of the furnace. A data block (DB) is set in the first-level control system of the heating furnace, and two signal points (B1, B2) are set in the second-level control system of the heating furnace; the first-level control system of the heating furnace interacts with the second-level system through the data block (DB), where the DB parameter is used as the master control switch for the second-level verification function. The data block DB in the first-level control system of the heating furnace is used for the flag indicating whether the second-level verification is put into use. When the DB block is assigned a value of 1 and remains so, it means that the first level allows the second-level verification; when the DB block is assigned a value of 0, it means that the first level does not allow the second-level verification; for the two signal points (B1, B2) in the second-level control system of the heating furnace, B1 is used as the flag bit for whether the heating furnace automatically loads materials, and B2 is used as the flag bit for whether to use the billet number identification function.

[0014] Figure 2As shown in the figure, a multi-signal collaborative control method for automatic matching of billets in a bar and wire rod reheating furnace: The DB data block set in the first-level control system of the reheating furnace has two states: 1 and 0. The DB parameter serves as the master control switch for the secondary verification function. Two signal points B1 and B2 are set in the second-level control system of the reheating furnace. Among them, B1 is the flag bit for whether automatic feeding is allowed, with two states: 0 and 1. When B1 = 0, it means that the secondary system does not allow automatic verification of feeding. When B1 = 1, it means that the secondary system allows automatic verification of feeding; B2 is the flag bit for whether the billet number identification function is used, also with two states: 0 and 1. When B2 = 0, it means that the secondary system uses the billet number identification function. When B2 = 1, it means that the secondary system does not use the billet number identification function. The control process is as follows 1) When the billets being charged do not require secondary verification information, set the data block in the primary system to DB = 0, then the secondary system is not allowed to verify the billets. When the secondary control system receives the signal of DB = 0, it stops all operations of verifying the billets at the secondary level. At this time, the operation of the billets running on the roller tables A1 - A4 and entering the furnace is completely executed by the primary control system, and it can be realized that the secondary control system does not participate in the signal tracking of scrap billets, and the primary control system completes the operation of charging scrap steel.

[0015] When in normal continuous production, the secondary control system automatically verifies the billets being charged. At this time, set the data block of the primary control system to DB = 1, indicating that the secondary control system is allowed to verify the billets.

[0016] 2) When the charging of the billets of a rolling plan is completed and there needs to be a blank step between the billets of two rolling plans, the secondary control system of the reheating furnace will automatically set the B1 signal (whether it is the automatic feeding signal) to 0. At this time, the secondary control system stops automatic verification of the billets, and the operator can perform the blank step operation in the reheating furnace at this time. After the blank step operation is completed, the operator confirms whether the secondary control system continues to automatically verify the charging according to the production situation. If it is confirmed to continue verifying the charging, at this time the B1 signal is set to 1, and the secondary control system continues to automatically verify the billets of the next rolling plan batch in the planned order.

[0017] 3) When the secondary control system automatically verifies the feeding, if the billet number identification device is not used to identify the billet numbers, the secondary control system will set the B2 signal to 0, indicating that the billet number identification result does not participate in the logic of automatic feeding at the secondary level. At this time, the billet number identification device still sends the billet number identification result to the secondary control system of the reheating furnace, but the system does not judge whether the identification result matches the current planned billet number. The secondary control system sequentially performs automatic verification and charging of the billets according to the order of the rolling plan billet numbers.

[0018] When the secondary control system automatically verifies the loading of billets, if a billet number identification device is used to identify the billet number, the secondary control system sets the B2 signal to 1, indicating that the billet number identification system is being used to verify the loading of billets. The billet number identification device sends the billet number identification result to the secondary control system of the reheating furnace. The secondary control system determines whether the billet number identification result matches the billet number to be verified in the current plan. If the matching result is correct, it automatically sends the planned billet information to the primary control system. After receiving the information of the billet to be loaded and verified, the primary control system starts the furnace charging operation to complete the operation of automatically verifying the loading of billets into the furnace. If the billet number identification result does not match the planned billet information, it automatically switches to manual verification of the billets, and the operator confirms the actual billet information on site to ensure the accuracy of verifying the loading of billets.

Claims

1. A control device for automatic matching plan charging of billets in a bar heating furnace, comprising a charging roller table system composed of a bar and wire heating furnace and a group of roller tables. A billet number identification device is installed at the inlet end of the roller table. Each roller table unit is driven by a frequency conversion motor and speed-regulated in sections to ensure accurate centering and positioning of the billets in front of the furnace. It is characterized in that: It also includes a set of roller tables at the entrance of the heating furnace. The roller tables at the entrance of the heating furnace are equipped with a positioning detection device and a billet number identification device. A data block DB is set in the primary control system of the heating furnace, and signal points B1 and B2 are set in the secondary control system of the heating furnace; the data block DB in the primary control system is used for the flag of whether the secondary verification is enabled. When the value of the DB block is 1 and remains so, it means that the primary level allows the secondary level to perform verification; when the value of the DB block is 0, it means that the primary level does not allow the secondary level to perform verification; for the two signal points B1 and B2 in the secondary control system of the heating furnace, B1 is used for the flag bit of whether the heating furnace automatically feeds materials, and B2 is used for the flag bit of whether the billet number identification function is used.

2. A control method for automatically matching the charging plan of billets in a bar heating furnace, using the control device as claimed in claim 1, characterized in that: The priority of the DB information is the highest. When the value of the DB block is 0, the secondary level does not verify the billets. When the value of the DB block is 1, the verification of the billets is allowed. The control process is as follows: 1) The secondary control system of the heating furnace detects the value assignment status of the DB block: If the value of the DB block is 0, the verification process is directly terminated, and the secondary system does not perform the verification of the billets; if the value of the DB block is 1, it enters the automatic feeding state judgment process and executes step 2). 2) When the value of the DB block is 1, detect the status of signal B1: If B1 = 0, it is in the non-automatic feeding state, and the secondary system does not perform the verification of the billets, and the process is terminated; if B1 = 1, when it is in the automatic feeding state, further detect the status of signal B2 and execute step 3). 3) When B1 = 1: When B2 = 0 and the billet number identification is not enabled, the secondary system directly performs the automatic verification of the billets; when B2 = 1 and the billet number identification is enabled, it is necessary to verify the billet number identification result: If the billet number identification result is correct, the secondary system performs the automatic verification of the billets; if the billet number identification result is abnormal, it triggers manual intervention for the verification of the billets.

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