A method for controlling energy-saving operation of a coiler on-roller table

Abstract

The application discloses a method for controlling energy-saving operation of a coiler on-roller, and relates to the technical field of metallurgy. The method is specifically applied to a hot-rolled strip steel production line and comprises the following steps: S1, a first coiler enters a pre-steel winding mode to wait for production; S2, a strip steel tracking position signal is acquired, and a second coiler entering the pre-steel winding mode next is selected according to the strip steel tracking position signal, including: in an emergency switching mode, the device preparation time of each second coiler entering the production and the time of the strip steel reaching the roller of each second coiler are acquired, the range of the second coiler entering the pre-steel winding mode next is preliminarily screened out, the speed-up time of the second coiler in the preliminarily screened range is acquired, and the second coiler entering the pre-steel winding mode next is determined. The application dynamically tracks the production state of the coiler, and controls the roller operation according to the need, so that the energy saving and equipment protection are realized while the production rhythm is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metallurgy, in particular to a method for controlling energy-saving operation of a coiler on-roll table. BACKGROUND

[0002] In the continuous production of hot-rolled strip steel, usually multiple coilers are arranged in parallel, and the coilers are alternately put into operation according to a preset order. In order to be able to cut into the next coil of steel at any time, it is generally kept that all on-roll tables are continuously operated in the industry. This mode causes the on-roll tables of non-production coilers to be idled for a long time, which not only wastes electric energy but also aggravates mechanical wear.

[0003] In order to overcome the above-mentioned defects, the prior art attempts to use “whether there is steel” as a start-stop criterion. However, in actual use, the reliability is poor, especially when the coiler is urgently switched, because there is a time difference between the start of the on-roll table and the reaching of the predetermined speed, the speed of the on-roll table is difficult to match the rolling speed, and the surface quality defects of the strip steel are easily caused, which seriously restricts the application of energy-saving operation control in the continuous production of hot-rolled strip steel. SUMMARY

[0004] The present application provides a method for controlling energy-saving operation of a coiler on-roll table. By tracking the production state of a hot-rolling coiler, the necessary operating state of the on-roll table of the coiler is determined, and the on-roll table of the coiler is put into an energy-saving operation mode under the condition that the requirement of large production rhythm is met, so as to save electric energy consumption and reduce unnecessary consumption of equipment, and increase the service life of each part.

[0005] The technical means adopted by the present application are as follows:

[0006] A method for controlling energy-saving operation of a coiler on-roll table is applied to a hot-rolled strip steel production line, the hot-rolled strip steel production line comprising one first coiler and N second coilers, N 2, the first coiler is a public coiler that is frequently operated, and the second coilers are switched according to actual needs; the second coilers are put into production in time, the second coilers are numbered according to a conventional production order, and the method comprises the following steps:

[0007] S1, the first coiler enters a pre-coiling steel mode to wait for being put into production;

[0008] S2, a strip steel tracking position signal is acquired, and according to the strip steel tracking position signal, the next second coiler entering the pre-coiling steel mode is selected, comprising:

[0009] In a normal production mode, the second coilers are put into production in turn according to the strip steel tracking position signal, and the on-roll table of the second coiler that has not detected the strip steel tracking signal does not operate;

[0010] Or, in the emergency switching mode, the device preparation time of each second coiler put into production is obtained And the time of the strip reaching the roller table of each second coiler Based on And The comparison results, the range of the next second coiler entering the pre-coiled steel mode is preliminarily screened, and the speed-up time of the second coiler in the preliminarily screened range is obtained According to the comparison results of And The next second coiler entering the pre-coiled steel mode is determined, and the emergency switching mode is triggered when the current second coiler entering the pre-coiled steel mode fails.

[0011] Further, based on the comparison results of And The range of the next second coiler entering the pre-coiled steel mode is preliminarily screened, including: obtaining the second coiler satisfying ≥ Enter the preliminarily screened range.

[0012] Further, according to the comparison results of And The next second coiler entering the pre-coiled steel mode is determined, including: obtaining the second coiler satisfying And the second coiler with the most advanced number is taken as the next second coiler entering the pre-coiled steel mode.

[0013] Further, the strip tracking position signal of the on-machine roller table of each coiler is obtained, including:

[0014] According to the change of the rolling force of the rolling system, the first strip position signal is obtained;

[0015] The temperature data of the on-machine roller table of each coiler is obtained by the cooling system, and the second strip position signal is obtained according to the temperature data of the on-machine roller table of each coiler;

[0016] When the position difference between the first strip position signal and the second strip position signal is within a preset window range, the second strip position signal is taken as the strip tracking signal of the on-machine roller table of the coiler;

[0017] When the position difference between the first strip position signal and the second strip position signal exceeds the preset window range, the first strip position signal is taken as the strip tracking signal of the on-machine roller table of the coiler.

[0018] Further, the method further comprises:

[0019] S0. Determine the operating mode of the upper roller conveyor of the winding machine. If the current operating mode is the test run mode, turn on both the upper roller conveyors of the first winding machine and the second winding machine to the operating state until the test run requirements are met.

[0020] Furthermore, all the upper rollers of the winding machine in use are turned on to the running state until the test run requirements are met, including: using the winding machine's "AUTO START" signal to issue a one-time speed reduction to all the upper rollers of the winding machine in the selected use state, and exiting the initial test run after a preset time T.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. This invention accurately determines the necessary operating status of the coiler's roller conveyor by tracking the production status of the hot-rolled coiler. In normal production mode, the second coiler roller conveyor does not operate if no strip tracking signal is detected, avoiding unnecessary energy consumption. In emergency switching mode, based on the comparison of equipment preparation time and strip arrival time, and further screening of acceleration time, it ensures that a specific second coiler roller conveyor is activated only when necessary, further reducing energy waste.

[0023] 2. Because the roller conveyor in this application does not operate when not needed, mechanical wear and electrical losses of the equipment are reduced. This not only reduces equipment maintenance costs but also extends the service life of various components, improving the reliability and stability of the equipment. By precisely controlling the operation of the roller conveyor, the equipment is prevented from operating under unnecessary high loads, further reducing the risk of equipment fatigue and damage.

[0024] 3. The strip tracking signal in this application adopts dual redundancy detection of rolling force change and roller table temperature rise. This mechanism utilizes the complementary characteristics of the two physical quantities to effectively shield on-site interference such as water mist, iron oxide scale, and heat source reflection, significantly reducing the probability of "false no steel" and "missed steel detection", ensuring that a reliable strip position can still be given in harsh environments of high temperature, high humidity, and high dust, thus providing a reliable basis for roller table start-up and shutdown.

[0025] 4. This application features two operating modes: trial run and energy saving. In trial run mode, the "AUTO START" signal from the winding machine starts all in-use roller conveyors at once, and automatically exits the trial run after a preset time T, completing the equipment break-in process without manual intervention. In energy saving mode, the system seamlessly takes over after the trial run, dynamically starting and stopping the roller conveyors according to the aforementioned logic. The two modes can be switched with a single click through the operating interface, ensuring sufficient break-in for newly installed or overhauled equipment while avoiding long-term no-load losses caused by traditional "constant operation." This achieves a triple effect of saving electricity, reducing mechanical wear, and reducing maintenance workload, and can be quickly deployed without complex system architecture modifications. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a flowchart of a method for controlling the energy-saving operation of the roller conveyor of a winding machine according to the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] like Figure 1 As shown, this invention provides a method for controlling the energy-saving operation of the roller conveyor on a coiler, applied to a hot-rolled strip steel production line, wherein the hot-rolled strip steel production line includes one first coiler and N second coilers, N 2. The first winding machine is a regularly operating public winding machine, while the second winding machine switches its operating status according to actual needs. The second winding machine is put into production in shifts, and it is numbered according to the conventional production sequence. According to production requirements, the production system has two operating modes: a trial run mode and an energy-saving production mode. The trial run mode is used during the initial startup of the winding machine's upper roller conveyor, while the energy-saving production mode is used when the upper roller conveyor is operating normally. Once the initial startup of the upper roller conveyor meets the trial run requirements, it can be switched to the energy-saving production mode automatically or manually. The above method mainly includes the following steps.

[0031] S0. Determine the operating mode of the winding machine's upper roller conveyor. If the current operating mode is trial run mode, start both the first and second winding machine's upper roller conveyors to the operating state until the trial run requirements are met. This step mainly uses the winding machine's "AUTO START" signal to issue a one-time speed reduction to all selected upper roller conveyors, and exits the initial trial run after a preset time T. Generally, the preset time T is within 10 minutes.

[0032] S1, under the energy-saving production mode, the first coiler enters the pre-coil steel mode and waits to be put into production.

[0033] S2. Obtain the strip tracking position signal. Based on the strip tracking position signal, select the next second coiler to enter the pre-coiling mode. This includes: in normal production mode, each second coiler is put into production sequentially according to the strip tracking position signal; the roller conveyor of the second coiler that does not detect the strip tracking signal does not operate; or, in emergency switching mode, obtain the equipment preparation time for each second coiler to be put into production. And the time it takes for the strip to reach each of the second coiler rollers. ,based on and Based on the comparison results, the range of the second coiler to enter the pre-coiled steel mode was initially selected, and the acceleration time of the second coiler within the initially selected range was obtained. ,according to and The comparison results determine the next winding machine to enter the pre-wound steel mode, where the emergency switching mode is triggered when the second winding machine currently entering the pre-wound steel mode fails.

[0034] In this embodiment, the switch from normal production mode to emergency switching mode needs to be triggered automatically by the system or manually by the operator. When the system detects a malfunction in the coiler currently in the pre-coiled steel state, it can automatically enter emergency switching mode. Simultaneously, if the operator discovers an emergency, such as someone in an unsafe location, they can also manually initiate emergency switching.

[0035] To further illustrate the solution of this application, the winding machine system in this embodiment includes three winding machines. Winding machine #1 is the first winding machine, also known as the common winding machine, which needs to operate continuously to meet production preparation requirements. Winding machines #2 and #3 are the second winding machines, and are put into production at different times according to actual usage needs. In this embodiment, the basic control objective under normal circumstances is set as follows: when winding machine #1 is producing, the roller conveyors of winding machines #2 and #3 stop operating; when winding machine #2 is producing, the roller conveyor of winding machine #3 stops operating.

[0036] To better meet control requirements, in normal production mode, this embodiment pre-sets three coiler switching signals: SL1, SL2, and SL3, corresponding to switching to coiler #1, coiler #2, and coiler #3 respectively to enter pre-coiled steel mode. Only one coiler switching signal is active at any given time. Strip tracking signals include TRUCK2 and TRUCK3, corresponding to the strip tracking status of the on-machine roller conveyor for coiler #2 and coiler #3 respectively.

[0037] When SL1 is active and TRUCK2 is inactive, the overhead conveyor of coiler #2 stops operating. At this time, the combination of SL1, SL2, and SL3 is "100", and TRUCK2 (coiler #2 tracking) is "0", meaning there is no strip on coiler #2. At this time, the RUN2 status of the upper roller conveyor of the No. 2 coiler is "0", which means that the upper roller conveyor of the No. 2 coiler is not running.

[0038] When SL1 is active and TRUCK3 is inactive, the overhead conveyor of coiler #3 stops operating. At this time, the combination of SL1, SL2, and SL3 is "100", and TRUCK3 (coiler #3 tracking) is "0", meaning there is no strip on coiler #3. At this time, the operating status RUN3 of the upper roller conveyor of the No. 3 coiler is "0", which means that the upper roller conveyor of the No. 3 coiler is not operating.

[0039] When the SL2 signal is active and the TRUCK3 signal is inactive, the control system stops the operation of the No. 3 coiler's overhead conveyor. At this time, the combination of SL1, SL2, and SL3 is "010", and TRUCK3 (No. 3 overhead conveyor tracking) is "0", meaning there is no strip on the No. 3 coiler. At this time, the operating status of the upper roller conveyor of the No. 2 coiler is "1" (RUN2), indicating that the upper roller conveyor of the No. 2 coiler is operating, and "0" (RUN3) indicates that the upper roller conveyor of the No. 3 coiler is not operating.

[0040] When the SL3 signal is active, the machine roller conveyors of both the #2 and #3 winding machines are in operation. At this time, the combination of SL1, SL2, and SL3 is "001", and both RUN2 and RUN3 are "1", indicating that the machine roller conveyors of both the #2 and #3 winding machines are in operation.

[0041] Before implementing energy-saving control using the scheme described in this application, the next winding machine to be activated is typically determined based on production data. The corresponding winding machine status signal is then set to 1, thus obtaining the next combination of SL1, SL2, and SL3. These combinations then alternate sequentially. Specifically, if the next activated winding machine is determined to be winding machine #1, the SL1, SL2, and SL3 combination starts from "100" and alternates in the order of "100", "010", "001", "100", "010", "001", ... If the next activated winding machine is determined to be winding machine #2, the SL1, SL2, and SL3 combination starts from "010" and alternates in the order of "010", "001", "100", "010", "001", "100", ...

[0042] As a preferred embodiment of the present invention, this application proposes a dual-redundant detection mechanism for strip tracking signal acquisition, which includes both rolling force change and roller table temperature rise. Specifically, acquiring the strip tracking signal from each coiler's roller table includes the following steps.

[0043] a. Obtain the position signal of the first strip based on the change in rolling force of the rolling system.

[0044] b. Obtain the temperature data of the upper roller table of each coiler from the cooling system, and obtain the second strip position signal based on the temperature data of the upper roller table of each coiler.

[0045] c. When the position difference between the first strip position signal and the second strip position signal is within a preset window range, the second strip position signal is used as the strip tracking signal on the coiler's upper roller conveyor; when the position difference between the first strip position signal and the second strip position signal exceeds the preset window range, the first strip position signal is used as the strip tracking signal on the coiler's upper roller conveyor. Preferably, the preset window range generally does not exceed 10m.

[0046] In addition to the normal operating mode, this application also considers the situation where a winding machine needs to be switched over due to a malfunction of one winding machine. That is, in emergency switchover mode, the equipment preparation time for each second winding machine to be put into production is obtained. And the time it takes for the strip to reach each of the second coiler rollers. ,based on and Based on the comparison results, the range of the second coiler to enter the pre-coiled steel mode was initially selected, and the acceleration time of the second coiler within the initially selected range was obtained. ,according to and The comparison results determine the second winding machine to enter the pre-wound steel mode next.

[0047] Specifically, let's assume the preparation time for other equipment in the winding machine is... (Including the time required for other equipment on the winding machine to prepare for production, mainly the time required for the pinch rollers to descend into position), the time required for the roller conveyor speed to reach the set speed is... This data can be obtained from the roller conveyor speed curve. It is mainly affected by the speed of the incoming steel strip. The time for the strip to reach the pinch rolls is... ,if ≥ This indicates that if an emergency switch is performed at this point, the strip to be coiled can be salvaged. This indicates that the switching process is no longer effective, and preparations for processing the scrap steel need to be made. Therefore, in ≥ In the case of, if If so, the roller conveyor will start running briefly, when Then stop the roller conveyor.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the energy-saving operation of the roller conveyor on a coiler, applied to a hot-rolled strip steel production line, characterized in that, The hot-rolled strip steel production line includes one first coiler and N second coilers, N 2. The first winding machine is a public winding machine that operates regularly, while the second winding machine switches its operating status according to actual needs; the second winding machine is put into production at different times, and the second winding machine is numbered according to the conventional production sequence. The method includes the following steps: S1. The first coiler enters the pre-coil steel mode and awaits production. S2. Obtain the strip tracking position signal, and select the next coiler to enter the pre-coiling mode based on the strip tracking position signal, including: In normal production mode, each second coiler is put into production in sequence according to the strip tracking position signal. The roller conveyor of the second coiler that does not detect the strip tracking signal does not operate. Alternatively, in emergency switchover mode, obtain the equipment preparation time for each second take-up machine to be put into production. And the time it takes for the strip to reach each of the second coiler rollers. ,based on and Based on the comparison results, the range of the second coiler to enter the pre-coiled steel mode was initially selected, and the acceleration time of the second coiler within the initially selected range was obtained. ,according to and The comparison results determine the next winding machine to enter the pre-coiled steel mode. The emergency switching mode is triggered when the second winding machine currently entering the pre-coiled steel mode malfunctions. The acquisition of strip tracking position signals on the roller conveyors of each coiler includes: The position signal of the first strip is obtained based on the change in rolling force in the rolling system. The cooling system acquires temperature data from the roller conveyors of each coiler, and based on this temperature data, the second strip position signal is obtained. When the position difference between the first strip position signal and the second strip position signal is within a preset window range, the second strip position signal is used as the strip tracking signal on the coiler's upper roller conveyor. When the position difference between the first strip position signal and the second strip position signal exceeds the preset window range, the first strip position signal is used as the strip tracking signal on the upper roller table of the coiler.

2. The method for controlling the energy-saving operation of the roller conveyor of a winding machine according to claim 1, characterized in that, based on and Based on the comparison results, the range of the second coiler to enter the pre-coiled steel mode was initially selected, including: obtaining the required parameters. ≥ The second take-up machine enters the initial screening range.

3. The method for controlling the energy-saving operation of the roller conveyor on the winding machine according to claim 1, characterized in that, according to and The comparison results determine the next winding machine to enter the pre-wound steel mode, including: obtaining the required parameters. The second winding machine with the highest number will be the next winding machine to enter the pre-wound steel mode.

4. The method for controlling the energy-saving operation of the roller conveyor on the winding machine according to claim 1, characterized in that, The method further includes: S0. Determine the operating mode of the upper roller conveyor of the winding machine. If the current operating mode is the test run mode, turn on both the upper roller conveyors of the first winding machine and the second winding machine to the operating state until the test run requirements are met.

5. A method for controlling the energy-saving operation of the roller conveyor on a winding machine according to claim 4, characterized in that, Start all the upper rollers of the winding machine in use and run them until the test run requirements are met, including: using the winding machine's "AUTO START" signal to set a speed for all the upper rollers of the winding machine in use at one time, and exiting the initial test run after a preset time T.

Images