A hot strip rolling coiling temperature control method, device, equipment and medium

Abstract

This invention discloses a method, apparatus, equipment, and medium for controlling the coiling temperature of hot-rolled strip steel. The method includes: acquiring the measured temperature value of any strip steel control sample when it is detected that any strip steel control sample has arrived at the fine-tuning section; acquiring the measured coiling temperature value of the strip steel control sample after it is detected that any strip steel control sample has passed the coiling temperature detector, and determining the strip steel control sample to be adjusted currently at the entrance of the fine-tuning section, and performing the following adjustment steps: predicting the coiling temperature deviation of the strip steel control sample to be adjusted based on the measured temperature value corresponding to the strip steel control sample that has passed the coiling temperature detector, the measured coiling temperature value, the measured temperature value of the strip steel control sample to be adjusted when it arrives at the fine-tuning section, and the target coiling temperature value; and adjusting the number of manifolds opened in the fine-tuning section based on the coiling temperature deviation to control the coiling temperature of the strip steel control sample to be adjusted. This method improves the accuracy of coiling temperature control.

Description

Technical Field

[0001] This invention relates to the field of steel rolling technology, and in particular to a method, apparatus, equipment and medium for controlling the coiling temperature of hot strip steel. Background Technology

[0002] The coiling temperature of hot-rolled strip is the most critical parameter for ensuring the microstructure and uniformity of the product. In hot-rolled production, after finishing rolling, the strip temperature is reduced from the final rolling temperature to the target coiling temperature through a laminar flow cooling system. The laminar flow cooling system consists of a roughing section and a finishing section. After cooling in the finishing section, the strip's final actual temperature is measured by a coiling temperature detection instrument. The temperature control model divides the strip along its length into several control samples. By adjusting the number of cooling water nozzles opened when different samples pass through the laminar flow cooling system, the final coiling temperature is controlled.

[0003] The coarse temperature adjustment section in laminar cooling plays a major role in temperature regulation, accounting for more than 60% of the total temperature adjustment in the entire laminar cooling process. The fine temperature adjustment section, on the other hand, ensures precise temperature control, guaranteeing better accuracy in the actual coiling temperature. However, current technologies still suffer from poor coiling temperature control accuracy in the fine temperature adjustment process, severely impacting the quality of rolled steel. Summary of the Invention

[0004] This application provides a method, apparatus, equipment, and medium for controlling the coiling temperature of hot-rolled strip steel. This method can accurately predict the coiling temperature deviation value of the strip steel control sample, thereby accurately controlling the number of cooling manifolds opened and improving the accuracy of hot-rolled strip steel coiling temperature control.

[0005] In a first aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0006] A method for controlling the coiling temperature of hot-rolled strip steel includes:

[0007] For multiple strip steel control samples, when any strip steel control sample is detected to have reached the fine-tuning section, the measured temperature value of the strip steel control sample is obtained; after any strip steel control sample is detected to have passed the coiling temperature detector, the measured coiling temperature value of the strip steel control sample is obtained, and the strip steel control sample to be adjusted currently at the entrance of the fine-tuning section is determined. The following adjustment steps are then performed: the measured temperature value of the strip steel control sample to be adjusted when it reaches the fine-tuning section is obtained; based on the first measured temperature value, the measured coiling temperature value, the second measured temperature value, and the target coiling temperature value, the coiling temperature deviation of the strip steel control sample to be adjusted is predicted, wherein the first measured temperature value is the measured temperature value corresponding to the strip steel control sample currently passing the coiling temperature detector, and the second measured temperature value is the temperature value of the strip steel control sample to be adjusted when it reaches the fine-tuning section; based on the coiling temperature deviation, the number of manifolds opened in the fine-tuning section is adjusted to control the coiling temperature of the strip steel control sample to be adjusted.

[0008] Preferably, the step of obtaining the measured temperature value of the strip control sample when any strip control sample is detected to have arrived at the fine-tuning section includes: obtaining the measured temperature value of the strip control sample by means of a fine-tuning section temperature detector set at the entrance of the fine-tuning section when any strip control sample is detected to have arrived at the fine-tuning section.

[0009] Preferably, determining the strip control sample currently at the entrance of the fine-tuning section includes: acquiring the horizontal distance between the fine-tuning section temperature detector and the winding temperature detector; and determining the strip control sample currently at the entrance of the fine-tuning section based on the horizontal distance and the set strip control sample length.

[0010] Preferably, predicting the coiling temperature deviation of the control sample of the strip to be adjusted based on the first measured temperature value, the measured coiling temperature value, the second measured temperature value, and the target coiling temperature value includes: subtracting the target coiling temperature value and the first measured temperature value from the measured coiling temperature value, and then adding the second measured temperature value to obtain an initial value of the coiling temperature deviation; multiplying the initial value of the coiling temperature deviation by a set control gain coefficient to predict the coiling temperature deviation of the control sample of the strip to be adjusted.

[0011] Preferably, adjusting the number of manifolds opened in the fine-tuning section based on the winding temperature deviation includes: obtaining the current number of manifolds opened; if the winding temperature deviation is greater than a set upper limit of temperature deviation, then performing positive temperature deviation control adjustment; if the winding temperature deviation is less than a set lower limit of temperature deviation, then performing negative temperature deviation control adjustment; if the winding temperature deviation is between the set upper limit of temperature deviation and the set lower limit of temperature deviation, then not adjusting the number of manifolds opened in the fine-tuning section.

[0012] Preferably, the temperature positive deviation control adjustment includes a manifold opening calculation step: incrementing the number of manifolds opened in the fine-tuning section by 1; subtracting the cooling value corresponding to the increased number of manifolds opened from the coiling temperature deviation to determine the predicted coiling temperature deviation value of the strip control sample to be adjusted; if the predicted coiling temperature deviation value is greater than the set upper limit of temperature deviation, and the number of manifolds opened after incrementing by 1 is less than the maximum allowable number of manifolds opened, then the manifold opening calculation step continues to be executed until the predicted coiling temperature deviation value is less than or equal to the set upper limit of temperature deviation, or the number of manifolds opened is equal to the maximum allowable number of manifolds opened, then the control ends.

[0013] Preferably, the temperature negative deviation control adjustment includes a manifold closure calculation step: subtracting 1 from the number of manifolds opened in the fine-tuning section; adding the cooling value corresponding to the closed manifold to the coiling temperature deviation to determine the predicted coiling temperature deviation value of the strip steel control sample to be adjusted; if the predicted coiling temperature deviation value is less than the set lower limit of temperature deviation, and the number of manifolds opened after subtracting 1 is greater than the minimum allowable number of manifolds opened, then the manifold closure calculation step continues to be executed until the predicted coiling temperature deviation value is greater than or equal to the set lower limit of temperature deviation, or the number of manifolds opened is equal to the minimum allowable number of manifolds opened, then the control ends.

[0014] Secondly, through an embodiment of the present invention, the present invention provides the following technical solution:

[0015] A hot strip coiling temperature control device includes:

[0016] The first acquisition module is used to acquire the measured temperature value of a strip control sample when any strip control sample is detected to have reached the fine-tuning section.

[0017] The second acquisition module is used to acquire the measured value of the coiling temperature of any strip control sample after detecting that the strip control sample has passed the coiling temperature detector, and to determine the strip control sample to be adjusted that is currently at the entrance of the fine adjustment section, and to perform the following adjustment steps.

[0018] The third acquisition module is used to acquire the measured temperature value of the control sample of the strip to be adjusted when it reaches the fine-tuning section.

[0019] The temperature deviation calculation module is used to predict the coiling temperature deviation of the strip control sample to be adjusted based on the first measured temperature value, the measured coiling temperature value, the second measured temperature value, and the target coiling temperature value. The first measured temperature value is the measured temperature value corresponding to the strip control sample that has passed the coiling temperature detector, and the second measured temperature value is the measured temperature value when the strip control sample to be adjusted reaches the fine adjustment section.

[0020] The adjustment module is used to adjust the number of manifolds opened in the fine-tuning section based on the winding temperature deviation, thereby controlling the winding temperature of the strip control sample to be adjusted.

[0021] Thirdly, through one embodiment of the present invention, the following technical solution is provided:

[0022] An electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the method described in any of the first aspects above.

[0023] Fourthly, through one embodiment of the present invention, the following technical solution is provided:

[0024] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in any of the first aspects above.

[0025] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0026] The hot-rolled strip coiling temperature control method provided in this invention predicts the coiling temperature deviation of the strip currently at the fine-tuning section entrance when it reaches the coiling temperature detection position, based on the measured coiling temperature of the strip control sample that has completed coiling temperature detection, the measured temperature value of the strip control sample, the target coiling temperature value, and the measured temperature value of the strip sample currently at the fine-tuning section entrance. Then, based on this coiling temperature deviation, the cooling water volume in the fine-tuning section is adjusted to eliminate the temperature deviation, achieving precise control of the hot-rolled strip coiling temperature. This method effectively mitigates the impact of operating condition fluctuations during laminar cooling, avoiding the influence of factors such as cooling water volume, strip running speed, cooling water temperature, and the calculation accuracy of the control model itself on the prediction accuracy of the strip coiling temperature. It can accurately predict the strip coiling temperature deviation and then precisely adjust the number of manifolds opened in the laminar cooling fine-tuning section, ultimately improving the accuracy of hot-rolled strip coiling temperature control. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0028] Figure 1 This is a flowchart of the hot strip coiling temperature control method in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram comparing the measured temperature curves of strip steel of the same specification and grade before and after application in an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram comparing the measured temperature curves of strip steel of the same specification and grade before and after application in another embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the hot strip coiling temperature control device in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. Detailed Implementation

[0033] This application provides a method, apparatus, equipment, and medium for controlling the coiling temperature of hot-rolled strip steel. This method can accurately predict the coiling temperature deviation value of the strip steel control sample, thereby accurately controlling the number of cooling manifolds opened and improving the accuracy of hot-rolled strip steel coiling temperature control.

[0034] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows:

[0035] A method for controlling the coiling temperature of hot-rolled strip steel includes: for multiple strip steel control samples, when any strip steel control sample is detected to have reached the fine-tuning section, acquiring the measured temperature value of the strip steel control sample; after any strip steel control sample is detected to have passed the coiling temperature detector, acquiring the measured coiling temperature value of that strip steel control sample, and determining the strip steel control sample to be adjusted currently at the entrance of the fine-tuning section, and performing the following adjustment steps: acquiring the measured temperature value of the strip steel control sample to be adjusted when it reaches the fine-tuning section; predicting the coiling temperature deviation of the strip steel control sample to be adjusted based on a first measured temperature value, a measured coiling temperature value, a second measured temperature value, and a target coiling temperature value, wherein the first measured temperature value is the measured temperature value corresponding to the strip steel control sample currently passing the coiling temperature detector, and the second measured temperature value is the temperature value of the strip steel control sample to be adjusted when it reaches the fine-tuning section; and adjusting the number of manifolds opened in the fine-tuning section based on the coiling temperature deviation to control the coiling temperature of the strip steel control sample to be adjusted.

[0036] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0037] Firstly, the embodiments of the present invention provide a method for controlling the coiling temperature of hot-rolled strip steel, specifically, as follows: Figure 1 As shown, the method includes the following steps S101 to S105:

[0038] Step S101: For multiple strip control samples, when any strip control sample is detected to have reached the fine-tuning section, the measured temperature value of the strip control sample is obtained.

[0039] Step S102: After detecting that any strip control sample has passed the coiling temperature detector, the measured coiling temperature value of the strip control sample is obtained, and the strip control sample to be adjusted that is currently at the entrance of the fine-tuning section is determined. The following adjustment steps are then performed:

[0040] Step S103: Obtain the measured temperature value of the control sample of the strip to be adjusted when it reaches the fine-tuning section;

[0041] Step S104: Based on the first measured temperature value, the measured winding temperature value, the second measured temperature value, and the target winding temperature value, predict the winding temperature deviation of the strip control sample to be adjusted, wherein the first measured temperature value is the measured temperature value corresponding to the strip control sample that has passed the winding temperature detector, and the second measured temperature value is the measured temperature value when the strip control sample to be adjusted reaches the fine-tuning section.

[0042] In actual control, for each strip control sample, when any strip control sample is detected to have reached the fine-tuning section, the measured temperature value of the strip control sample is obtained.

[0043] Specifically, when the strip control sample is detected to have arrived at the fine-tuning section, the measured temperature value of the strip control sample can be obtained by: when the strip control sample is detected to have arrived at the fine-tuning section, the measured temperature value of the strip control sample can be obtained by using a fine-tuning section temperature detector set at the entrance of the fine-tuning section.

[0044] Optionally, the temperature detector in the fine-tuning section can be set at a distance of 4-5m from the entrance of the fine-tuning section, and the temperature detector in the fine-tuning section can be a pyrometer. After the strip control sample passes through the pyrometer at the entrance of the fine-tuning section, the measured temperature value of the strip control sample in the fine-tuning section collected by the pyrometer is obtained.

[0045] Next, after detecting that any strip control sample after the fine-tuning section has passed the coiling temperature detector, the measured coiling temperature value of the strip control sample collected by the coiling temperature detector is obtained, and the strip control sample to be adjusted at the current entrance of the fine-tuning section is determined. Optionally, the coiling temperature detector can be a pyrometer.

[0046] In a specific embodiment, determining the strip control sample currently at the entrance of the fine-tuning section may include: obtaining the horizontal distance between the fine-tuning section temperature detector and the coiling temperature detector; and determining the strip control sample currently at the entrance of the fine-tuning section based on the horizontal distance and the set strip control sample length.

[0047] The set strip control sample length is the set sample length of the same coil of strip.

[0048] Specifically, based on the horizontal distance and the set strip control sample length, the strip control sample to be adjusted at the current fine-tuning section entrance is determined. This can include: dividing the horizontal distance by the strip control sample length and then adding 1 to determine the strip control sample to be adjusted at the current fine-tuning section entrance.

[0049] For example, assuming that after the i-th strip control sample passes the coiling temperature detector, the j-th strip control sample currently at the fine-tuning section entrance is the one to be adjusted, then based on the formula... Determine the value of j, where Lpro is the horizontal distance between the fine-tuning temperature detector and the winding temperature detector in mm, and Lsmp is the control sample length calculated by the temperature model in mm.

[0050] In a specific embodiment, after determining the control sample of the strip to be adjusted, the measured temperature value of the control sample of the strip to be adjusted when it reaches the fine adjustment section is obtained from the temperature detector of the fine adjustment section.

[0051] The measured temperature value corresponding to the strip control sample that has passed the current (i.e., the latest) winding temperature detector is used as the first measured temperature value, and the measured temperature value obtained when the strip control sample to be adjusted reaches the fine-tuning section is used as the second measured temperature value. Based on the first measured temperature value, the winding temperature measured value, the second measured temperature value, and the winding temperature target value, the winding temperature deviation of the strip control sample to be adjusted is determined. This can include: subtracting the winding temperature target value and the first measured temperature value from the winding temperature measured value, and then adding the second measured temperature value to obtain an initial value of the winding temperature deviation; multiplying the initial value of the winding temperature deviation by a set control gain coefficient to determine the winding temperature deviation of the strip control sample to be adjusted.

[0052] The target winding temperature can be any value set according to actual needs, and this application does not impose any limitation. Optionally, the control gain coefficient can be between 0.5 and 0.9.

[0053] Specifically, the coiling temperature deviation of the strip control sample to be adjusted (the j-th strip control sample) is:

[0054] ΔTc=a×[Tc_m(i)-Tt-Tp_m(i)+Tp_m(j)]

[0055] Where Tc_m(i) is the measured value of the coiling temperature of the i-th strip control sample, in °C; Tp_m(i) is the measured value of the first temperature of the i-th strip control sample (the measured value of the temperature in the fine-tuning section); Tp_m(j) is the measured value of the second temperature of the j-th strip control sample (the measured value of the temperature in the fine-tuning section); Tt is the target value of the coiling temperature, in °C; and a is the control gain coefficient.

[0056] Of course, as another optional embodiment, determining the coiling temperature deviation of the strip control sample to be adjusted based on the first measured temperature value, the coiling temperature value, the second measured temperature value, and the coiling temperature target value may further include: subtracting the coiling temperature target value and the first measured temperature value from the coiling temperature value, and then adding the second measured temperature value to determine the coiling temperature deviation of the strip control sample to be adjusted.

[0057] The coiling temperature deviation of the strip control sample (the j-th strip control sample) to be adjusted is:

[0058] ΔTc=[Tc_m(i)-Tt-Tp_m(i)+Tp_m(j)].

[0059] Step S105: Based on the winding temperature deviation, adjust the number of manifolds opened in the fine-tuning section to control the winding temperature of the strip control sample to be adjusted.

[0060] In a specific embodiment, the number of manifolds opened in the fine-tuning section is adjusted based on the winding temperature deviation, including: obtaining the current number of manifolds opened; if the winding temperature deviation is greater than the set upper limit of temperature deviation, then performing positive temperature deviation control adjustment; if the winding temperature deviation is less than the set lower limit of temperature deviation, then performing negative temperature deviation control adjustment; if the winding temperature deviation is between the set upper limit of temperature deviation and the set lower limit of temperature deviation, then the number of manifolds opened in the fine-tuning section is not adjusted.

[0061] The upper and lower limits of the temperature deviation set here can be limited as needed to ensure that the coiling temperature deviation is controlled within a reasonable temperature range, thereby improving the accuracy of hot strip coiling temperature control.

[0062] When the winding temperature deviation exceeds the set upper limit of the temperature deviation, it indicates that the number of cooling manifolds that need to be opened needs to be increased appropriately, so that the winding temperature of the strip control sample to be adjusted is reduced, and the winding temperature deviation is kept between the set upper limit and the set lower limit of the temperature deviation.

[0063] When the winding temperature deviation is less than the set lower limit of temperature deviation, it indicates that the number of cooling manifolds that need to be opened needs to be reduced appropriately, so that the winding temperature of the strip control sample to be adjusted increases, and the winding temperature deviation is kept between the set upper limit of temperature deviation and the set lower limit of temperature deviation.

[0064] Specifically, the temperature positive deviation control adjustment may include a manifold opening calculation step: increment the number of manifolds opened in the fine-tuning section by 1; subtract the cooling value corresponding to the increased manifold opening from the coiling temperature deviation to determine the coiling temperature deviation value of the strip control sample to be adjusted; if the coiling temperature deviation value is greater than the set upper limit of temperature deviation, and the number of manifolds opened after incrementing by 1 is less than the maximum allowable number of manifolds to be opened, then continue to execute the manifold opening calculation step until the coiling temperature deviation value is less than or equal to the set upper limit of temperature deviation, or the number of manifolds opened is equal to the maximum allowable number of manifolds to be opened, then end the control.

[0065] It should be noted that the cooling value corresponding to the increased number of open manifolds is the same as the increased cooling capacity of the cooling manifolds, and the unit is ℃.

[0066] For example, if the current number of manifolds opened, N, is obtained, and it is determined that the winding temperature deviation ΔTc(j) > the set upper limit of temperature deviation, Lu, then it is determined to be a positive temperature deviation control adjustment; if the winding temperature deviation ΔTc(j) < the set lower limit of temperature deviation, Lb, then it is determined to be a negative temperature deviation control adjustment; if Lb≤ΔTc(j)≤Lu, then the number of manifolds opened in the fine adjustment section is not adjusted, where Lu is in °C and Lb is in °C.

[0067] Positive temperature deviation control regulation, including a header opening calculation step: Let M = N + k, K = 1, where M is the number of headers opened, N is the original number of headers opened. After calculating the opening of the Mth header, the coiling temperature deviation value of the jth strip control sample is: ΔTc(j) = ΔTc(j) - Ta(M), where Ta(M) is the cooling capacity of the Mth header.

[0068] If the coiling temperature deviation value ΔTc(j) > the set upper limit of temperature deviation Lu, and the number of headers opened M <

[0069] the maximum allowable number of headers opened Nmax, then let k = k + 1, and repeat the header opening calculation step until ΔTc(j) ≤ Lu, or M > Nmax, then end the control calculation.

[0070] Furthermore, in order to achieve execution stability while ensuring the cooling effect, after ending the control, it may further include: setting the opening of the 1st to Mth headers in the fine-tuning section according to the set opening sequence of the cooling headers in the fine-tuning section.

[0071] In a specific embodiment, negative temperature deviation control regulation includes a header closing calculation step: reducing the number of headers opened in the fine-tuning section by 1; adding the cooling value corresponding to the closed header to the coiling temperature deviation to determine the coiling temperature deviation value of the strip control sample to be adjusted; if the coiling temperature deviation value is less than the set lower limit of temperature deviation, and the number of headers opened after subtracting 1 is greater than the minimum allowable number of headers opened, then continue to execute the header closing calculation step until the coiling temperature deviation value is greater than or equal to the set lower limit of temperature deviation, or the number of headers opened is equal to the minimum allowable number of headers opened, then end the control.

[0072] Among them, the cooling value corresponding to the closed header is also the cooling capacity of the closed cooling header, with the unit of °C.

[0073] For example, positive temperature deviation control regulation includes a header closing calculation step: Let M = N + k, K = 0, where M is the number of headers opened, N is the original number of headers opened. After calculating the closing of the Mth header, the coiling temperature deviation value of the jth strip control sample is: ΔTc(j) = ΔTc(j) + Ta(M), where Ta(M) is the cooling capacity of the Mth header.

[0074] If the coiling temperature deviation value ΔTc(j) < the set lower limit of temperature deviation Lb, and the number of headers opened M >

[0075] the minimum allowable number of headers opened Nmin, then let k = k + 1, and repeat the header closing calculation step until ΔTc(j) ≥ Lb, or M < Nmin, then end the control calculation.

[0076] Furthermore, to achieve both operational stability and cooling effectiveness, after the control process ends, the method may further include: setting the shut-off of the cooling manifolds in the fine-tuning section according to the pre-defined shut-off sequence. The following section describes the hot-rolled strip coiling temperature control method proposed in this application using specific application examples:

[0077] Case 1

[0078] The control method provided in this application was applied to a hot rolling production line of a factory to produce 2.5mm thick cold-rolled base material. Before the layer cooling fine adjustment, the distance Lpro between the high temperature gauge and the coiling high temperature gauge was 42m, the target value of the product coiling temperature was 560℃, Lu was +5℃, Lb was -5℃, a was 0.85, Nmax was 40, and Nmin was 1.

[0079] Compared with the temperature control effect of the same steel grade with a thickness of 2.5mm before the application of the technology, after adopting the method provided in this application, the temperature fluctuation range of the strip body during coiling decreased from -32℃ to +16℃ to -6℃ to +10℃, and the standard deviation of temperature deviation decreased from 6.78℃ to 4.25℃. The stability of strip coiling temperature control was significantly improved, and the temperature deviation was significantly reduced. The comparison results are as follows: Figure 2 As shown.

[0080] Case 2

[0081] The control method provided in this application was applied to a hot rolling production line of a factory to produce 3.0mm thick cold-rolled ultra-high strength steel base material. The distance between the high temperature gauge and the coiling high temperature gauge before the layer cooling fine adjustment was 27m. The target value of the product coiling temperature was 620℃. The value of Lu was +3℃, the value of Lb was -3℃, the value of a was 0.9, the value of Nmax was 40, and the value of Nmin was 1.

[0082] Compared with the temperature control effect of 3.0mm thick steel before the application of the technology, after adopting the method provided in this application, the temperature fluctuation range of the strip body during coiling decreased from -33℃ to 16℃ to -5℃ to +10℃, and the standard deviation of temperature deviation decreased from 9.97℃ to 3.83℃. The stability of strip coiling temperature control was significantly improved, and the temperature deviation was significantly reduced. The comparison results are as follows: Figure 3 As shown.

[0083] Therefore, this application achieves high accuracy in predicting strip coiling temperature. It addresses the problem that in actual production, factors such as cooling water volume, strip running speed, cooling water temperature, and the accuracy of the control model's calculations can cause significant deviations in the model's prediction of strip coiling temperature, thus affecting the coiling temperature deviation and ultimately leading to coiling temperature control errors. The control method provided in this application mitigates the impact of operating condition fluctuations during laminar cooling, improves the accuracy of the model's predicted coiling temperature, more accurately predicts strip coiling temperature deviations, and allows for precise adjustment of the number of manifolds opened in the laminar cooling fine-tuning section, ultimately achieving the goal of improving the accuracy of hot-rolled strip coiling temperature control.

[0084] In summary, the hot-rolled strip coiling temperature control method provided by this invention obtains the measured temperature of the strip before fine-tuning. Based on this, and using the temperature deviation of the strip control sample after fine-tuning and coiling temperature detection, the measured temperature of the strip control sample to be adjusted at the entrance of the fine-tuning section before fine-tuning, and the measured temperature of the latest strip control sample after coiling temperature detection, the coiling temperature deviation of the strip sample to be adjusted at the entrance of the fine-tuning section is predicted. Furthermore, the number of fine-tuning manifold adjustments required to eliminate this deviation is determined according to the cooling capacity of the corresponding cooling manifold, thereby improving the accuracy of hot-rolled strip coiling temperature control.

[0085] Secondly, based on the same inventive concept, this embodiment provides a hot-rolled strip steel coiling temperature control device, such as... Figure 4 As shown, it includes:

[0086] The first acquisition module 401 is used to acquire the measured temperature value of the strip control sample when any strip control sample is detected to have reached the fine adjustment section for multiple strip control samples.

[0087] The second acquisition module 402 is used to acquire the measured value of the coiling temperature of any strip control sample after detecting that the strip control sample has passed the coiling temperature detector, and to determine the strip control sample to be adjusted that is currently at the entrance of the fine adjustment section, and to perform the following adjustment steps.

[0088] The third acquisition module 403 is used to acquire the measured temperature value of the control sample of the strip to be adjusted when it reaches the fine adjustment section.

[0089] The temperature deviation calculation module 404 is used to predict the coiling temperature deviation of the strip control sample to be adjusted based on the first measured temperature value, the measured coiling temperature value, the second measured temperature value, and the target coiling temperature value. The first measured temperature value is the measured temperature value corresponding to the strip control sample that has passed the coiling temperature detector, and the second measured temperature value is the measured temperature value when the strip control sample to be adjusted reaches the fine adjustment section.

[0090] The adjustment module 405 is used to adjust the number of manifolds opened in the fine-tuning section based on the winding temperature deviation, and to control the winding temperature of the strip control sample to be adjusted.

[0091] As an optional embodiment, the first acquisition module 401 includes: when any strip control sample is detected to have arrived at the fine-tuning section, acquiring the measured temperature value of the strip control sample through a fine-tuning section temperature detector set at the entrance of the fine-tuning section.

[0092] As an optional embodiment, the second acquisition module 402 includes: acquiring the horizontal distance between the fine-tuning section temperature detector and the winding temperature detector; and determining the strip control sample currently at the entrance of the fine-tuning section based on the horizontal distance and the set strip control sample length.

[0093] As an optional embodiment, the temperature deviation calculation module 404 includes: subtracting the target value of the winding temperature and the first measured value of the winding temperature from the measured value of the winding temperature, and then adding the second measured value of the winding temperature to obtain an initial value of the winding temperature deviation; multiplying the initial value of the winding temperature deviation by a set control gain coefficient to predict the winding temperature deviation of the control sample of the strip to be adjusted.

[0094] As an optional embodiment, the adjustment module 405 includes: obtaining the current number of manifolds open; if the winding temperature deviation is greater than the set upper limit of temperature deviation, then performing positive temperature deviation control adjustment; if the winding temperature deviation is less than the set lower limit of temperature deviation, then performing negative temperature deviation control adjustment; if the winding temperature deviation is between the set upper limit of temperature deviation and the set lower limit of temperature deviation, then not adjusting the number of manifolds open in the fine adjustment section.

[0095] As an optional embodiment, the temperature positive deviation control adjustment includes a manifold opening calculation step: incrementing the number of manifolds opened in the fine-tuning section by 1; subtracting the cooling value corresponding to the increased manifold opening from the coiling temperature deviation to determine the coiling temperature deviation value of the strip control sample to be adjusted; if the coiling temperature deviation value is greater than the set upper limit of temperature deviation, and the number of manifolds opened after incrementing by 1 is less than the maximum allowable number of manifolds to be opened, then the manifold opening calculation step continues to be executed until the coiling temperature deviation value is less than or equal to the set upper limit of temperature deviation, or the number of manifolds opened is equal to the maximum allowable number of manifolds to be opened, then the control ends.

[0096] As an optional embodiment, the temperature negative deviation control adjustment includes a manifold closure calculation step: subtracting 1 from the number of manifolds opened in the fine-tuning section; adding the cooling value corresponding to the closed manifold to the coiling temperature deviation to determine the coiling temperature deviation value of the strip control sample to be adjusted; if the coiling temperature deviation value is less than the set lower limit of temperature deviation, and the number of manifolds opened after subtracting 1 is greater than the minimum allowable number of manifolds to be opened, then the manifold closure calculation step continues to be executed until the coiling temperature deviation value is greater than or equal to the set lower limit of temperature deviation, or the number of manifolds opened is equal to the minimum allowable number of manifolds to be opened, then the control ends.

[0097] Each of the above modules can be implemented using software code, in which case they can be stored in the memory of the control device. Alternatively, each of the above modules can be implemented using hardware, such as integrated circuit chips.

[0098] The hot strip coiling temperature control device provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0099] Thirdly, based on the same inventive concept, this embodiment provides an electronic device 500, such as... Figure 5 As shown, it includes: a memory 501, a processor 502, and a computer program 503 stored in the memory and executable on the processor. When the processor 502 executes the program, it implements the steps of the hot strip coiling temperature control method described in the first aspect above.

[0100] Since the electronic device described in this embodiment is the electronic device used to implement the control method in the embodiments of this application, those skilled in the art can understand the specific implementation method and various variations of the electronic device in this embodiment based on the control method described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any electronic device used by those skilled in the art to implement the control method in the embodiments of this application falls within the scope of protection of this application.

[0101] Fourthly, based on the same inventive concept, this embodiment provides a non-transitory computer-readable storage medium, which, when the instructions in the storage medium are executed by the processor of the electronic device 500, enables the electronic device 500 to perform a slab position tracking method, including the steps of the method described in any of the first aspects above.

[0102] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0103] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A module that specifies the function in one or more boxes.

[0104] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction modules implemented in a process. Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0105] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0106] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0107] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method of controlling the coiling temperature of a hot strip, characterized by, include: For multiple strip control samples, when any strip control sample is detected to have reached the fine-tuning section, the measured temperature value of the strip control sample is obtained. After detecting that any strip control sample has passed the coiling temperature detector, the measured coiling temperature of the strip control sample is obtained, and the strip control sample to be adjusted that is currently at the entrance of the fine-tuning section is determined. The following adjustment steps are then performed: Obtain the measured temperature value of the control sample of the strip to be adjusted when it reaches the fine-tuning section; Based on the first measured temperature value, the measured winding temperature value, the second measured temperature value, and the target winding temperature value, the winding temperature deviation of the strip control sample to be adjusted is predicted. The first measured temperature value is the measured temperature value corresponding to the strip control sample that has passed the winding temperature detector, and the second measured temperature value is the measured temperature value when the strip control sample to be adjusted reaches the fine-tuning section. Based on the winding temperature deviation, the number of manifolds opened in the fine-tuning section is adjusted to control the winding temperature of the strip control sample to be adjusted.

2. The method as described in claim 1, characterized in that, The step of acquiring the measured temperature value of the strip control sample when any strip control sample is detected to have reached the fine-tuning section includes: When any strip control sample is detected to have arrived at the fine-tuning section, the measured temperature value of the strip control sample is obtained by a fine-tuning section temperature detector set at the entrance of the fine-tuning section.

3. The method as described in claim 2, characterized in that, The process of determining the control sample of the strip steel to be adjusted that is currently at the entrance of the fine-tuning section includes: Obtain the horizontal distance between the fine-tuning section temperature detector and the winding temperature detector; Based on the horizontal distance and the set strip control sample length, the strip control sample to be adjusted that is currently at the entrance of the fine-tuning section is determined.

4. The method as described in claim 1, characterized in that, The prediction of the coiling temperature deviation of the strip control sample to be adjusted, based on the first measured temperature value, the second measured temperature value, and the target coiling temperature value, includes: Subtract the target value of the winding temperature and the first measured value of the winding temperature from the measured value of the winding temperature, and then add the second measured value of the winding temperature to obtain the initial value of the winding temperature deviation. The initial value of the coiling temperature deviation is multiplied by the set control gain coefficient to predict the coiling temperature deviation of the control sample of the strip to be adjusted.

5. The method as described in claim 1, characterized in that, The adjustment of the number of manifold openings in the fine-tuning section based on the winding temperature deviation includes: Get the current number of open manifolds; If the winding temperature deviation is greater than the set upper limit of temperature deviation, then positive temperature deviation control adjustment is performed; if the winding temperature deviation is less than the set lower limit of temperature deviation, then negative temperature deviation control adjustment is performed; if the winding temperature deviation is between the set upper limit of temperature deviation and the set lower limit of temperature deviation, then the number of manifolds opened in the fine-tuning section is not adjusted.

6. The method as described in claim 5, characterized in that, The temperature positive deviation control adjustment includes the following steps: incrementing the number of manifold openings in the fine adjustment section by 1; subtracting the cooling value corresponding to the increased opening manifold from the coiling temperature deviation to determine the coiling temperature deviation value of the strip control sample to be adjusted. If the winding temperature deviation value is greater than the set upper limit of temperature deviation, and the number of manifolds opened after adding 1 is less than the maximum allowable number of manifolds to be opened, then the manifold opening calculation step continues to be executed until the winding temperature deviation value is less than or equal to the set upper limit of temperature deviation, or the number of manifolds opened is equal to the maximum allowable number of manifolds to be opened, then the control ends.

7. The method as described in claim 5, characterized in that, The temperature negative deviation control adjustment includes a manifold closure calculation step: reduce the number of manifolds opened in the fine adjustment section by 1; add the cooling value corresponding to the closed manifold to the coiling temperature deviation to determine the coiling temperature deviation value of the strip steel control sample to be adjusted. If the winding temperature deviation value is less than the set lower limit of temperature deviation, and the number of manifolds opened after subtracting 1 is greater than the minimum allowable number of manifolds to be opened, then the manifold closing calculation step continues to be executed until the winding temperature deviation value is greater than or equal to the set lower limit of temperature deviation, or the number of manifolds opened is equal to the minimum allowable number of manifolds to be opened, then the control ends.

8. A device for controlling the temperature of hot-rolled strip steel coiling, characterized in that, include: The first acquisition module is used to acquire the measured temperature value of a strip control sample when any strip control sample is detected to have reached the fine-tuning section. The second acquisition module is used to acquire the measured value of the coiling temperature of any strip control sample after detecting that the strip control sample has passed the coiling temperature detector, and to determine the strip control sample to be adjusted that is currently at the entrance of the fine adjustment section, and to perform the following adjustment steps. The third acquisition module is used to acquire the measured temperature value of the control sample of the strip to be adjusted when it reaches the fine-tuning section. The temperature deviation calculation module is used to predict the coiling temperature deviation of the strip control sample to be adjusted based on the first measured temperature value, the measured coiling temperature value, the second measured temperature value, and the target coiling temperature value. The first measured temperature value is the measured temperature value corresponding to the strip control sample that has passed the coiling temperature detector, and the second measured temperature value is the measured temperature value when the strip control sample to be adjusted reaches the fine adjustment section. The adjustment module is used to adjust the number of manifolds opened in the fine-tuning section based on the winding temperature deviation, thereby controlling the winding temperature of the strip control sample to be adjusted.

9. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the steps of the method according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the method described in any one of claims 1-7.

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