A control method for automatic matching of the running speed of the inlet section of a continuous retreat unit

Abstract

The invention discloses a control method for automatically matching the running speed of an entrance section of a continuous annealing unit, comprising the following steps: obtaining the running speed of an annealing furnace, the total length of a steel coil and the remaining length of a looper; obtaining the running speed of the entrance section by using a running speed calculation formula of the entrance section based on the running speed of the annealing furnace, the total length of a steel coil and the remaining length of the looper, calculating the running speed of the strip steel of the entrance section by using the remaining strip steel length of an uncoiler and the remaining loop amount of the looper, and when the looper is full, the strip steel on the uncoiler is just unwound, so that the strip steel of the cleaning section runs at the smallest possible speed, thereby increasing the processing time of the strip steel in the cleaning section and improving the cleaning quality.

Description

Technical Field

[0001] The invention belongs to the field of automatic control of cold-rolled strip annealing process in metallurgical industry, and relates to a control method for automatic matching of running speed of an inlet section of a continuous annealing unit. Background Art

[0002] The continuous annealing unit for steel strip is used to eliminate the rolling stress generated by the cold rolling process of the steel strip after cold rolling to meet the performance requirements of subsequent treatment and processing. The steel strip at the entrance of the continuous annealing unit enters the annealing process after uncoiling, welding, cleaning, and entrance looping. In the cleaning process, the steel strip must undergo spray cleaning, brushing, electrolytic cleaning, hot water rinsing and drying. In order to ensure the cleaning quality of the steel strip in the cleaning process, the speed uniformity of the steel strip passing through the cleaning area should be ensured as much as possible to avoid the steel strip passing through rapidly.

[0003] In traditional applications, in order to ensure the continuous and stable operation of the annealing furnace area, after the front and rear coils are welded, the entry section fills the entry looper with the maximum running speed, and then keeps the running speed synchronized with the annealing furnace area. During the rapid punching process of the entry section, the strip steel processing time through the cleaning area is short, resulting in poorer surface cleaning quality than when the strip steel passes slowly. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a technical solution adopted by the present invention: a control method for automatic matching of the running speed of the inlet section of a continuous retreat unit, comprising the following steps:

[0005] Obtain the running speed of the annealing furnace, the total length of the steel coil and the remaining length of the looper;

[0006] Based on the running speed of the annealing furnace, the total length of the steel coil and the remaining length of the looper, the running speed of the entrance section is obtained by the calculation formula of the running speed of the entrance section.

[0007] Further: the calculation formula of the inlet section running speed is as follows:

[0008] Since the annealing furnace is also running during the uncoiling and sleeve punching process of the uncoiling machine, assuming that the time to fill the sleeve is t, we can get:

[0009] L payoff =L loop +V furnace *t(1)

[0010] t=(L payoff -L loop ) / V furnace (2)

[0011] V entry =L payoff / t+V offset (3)

[0012] Where, L payoff : Remaining length of uncoiler; L loop : The length required for the loop to be fully set; V furnace : Annealing furnace running speed; V entry : Running speed of the inlet section, V offset : Speed ​​deviation compensation.

[0013] Furthermore: the speed deviation compensation V offset It is determined based on the relationship between the loop filling time and the unwinding completion time of the uncoiler.

[0014] A computer-readable storage medium stores a computer program, wherein when the computer program is run, any one of the methods described above for accurately controlling the tail length of a strip of a continuous annealing unit unwinder is executed.

[0015] A control method for automatically matching the running speed of the inlet section of a continuous retreat unit comprises the following steps:

[0016] Acquisition module: used to obtain the running speed of the annealing furnace, the total length of the steel coil and the remaining length of the looper;

[0017] Calculation module: used to obtain the entrance section running speed based on the running speed of the annealing furnace, the total length of the steel coil and the remaining length of the looper through the entrance section running speed calculation formula.

[0018] The present invention provides a control method for automatically matching the running speed of the inlet section of a continuous annealing unit. The running speed of the strip steel in the inlet section is calculated by the remaining strip steel length of the uncoiler and the remaining looper amount. When the looper is full, the strip steel on the uncoiler is just unwound, so that the strip steel in the cleaning section runs at the smallest possible speed, thereby increasing the processing time of the strip steel in the cleaning section and improving the cleaning quality.

[0019] Based on the stabilization of equipment operation, there is no need to consider keeping the entrance loop full as soon as possible to prevent the abnormality of the entrance section from causing the loop to be empty. Taking the remaining length of the steel strip on the uncoiler, the remaining amount of the entrance loop and the operating speed of the annealing furnace area as considerations, the uncoiler is matched to fill the entrance loop just when the steel coil is uncoiled, so as to achieve the goal of minimizing the running speed of the cleaning section and optimizing the cleaning effect.

[0020] This method can be used to calculate the set speed of the inlet section of the continuous annealing unit; it perfectly matches the remaining strip length of the uncoiler, the inlet looper amount and the looping speed of the downstream process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is the equipment layout diagram of the inlet section of the continuous retreat unit;

[0023] Figure 2 This is the entrance section running speed matching relationship diagram.

[0024] Description of the drawings: 1. Uncoiler, 2. Welding machine, 3. Cleaning section module, 4. Looper, 5. Annealing furnace. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0032] Figure 1It is the equipment layout diagram of the inlet section of the continuous retreat unit; Figure 2 This is the entrance section running speed matching relationship diagram.

[0033] The equipment at the entrance section of the continuous annealing unit includes: an uncoiler 1, a welder 2, a cleaning section module 3, a looper 4 and an annealing furnace 5;

[0034] The output end of the welding machine 2 is connected to the input end of the uncoiler 1, the output end of the uncoiler 1 is connected to the input end of the cleaning section module 3, the output end of the cleaning section module 3 is connected to the input end of the looper 4, and the output end of the looper 4 is connected to the annealing furnace 5;

[0035] A control method for automatically matching the running speed of the inlet section of a continuous retreat unit comprises the following steps:

[0036] S1: Obtain the running speed of the annealing furnace 5, the total length of the steel coil and the remaining length of the looper 4;

[0037] S2: Based on the running speed of the annealing furnace 5, the total length of the steel coil and the remaining length of the looper 4, the final entry section running speed is obtained through the entry section running speed calculation formula.

[0038] Steps S1 and S2 are performed sequentially;

[0039] Further: the calculation formula of the inlet section running speed is as follows:

[0040] Since the annealing furnace 5 is also running during the uncoiling and sleeve punching process of the uncoiling machine 1, assuming that the time to fill the looper 4 is t, we can get:

[0041] L payoff =L loop +V furnace *t(1)

[0042] t=(L payoff -L loop ) / V furnace (2)

[0043] V entry =L payoff / t+V offset (3)

[0044] Where, L payoff : Remaining length of unwinder 1; L loop : The length required for a full set of loops 4; V furnace : Annealing furnace 5 operating speed; V entry : Running speed of the inlet section, V offset : Speed ​​deviation compensation.

[0045] The speed deviation compensation V offsetIt is determined based on the relationship between the time when the loop 4 is filled and the time when the unwinding machine 1 completes the unwinding.

[0046] A computer-readable storage medium stores a computer program, wherein when the computer program is run, a method for accurately controlling the tail length of a strip of an unwinding unit uncoiler is executed.

[0047] A control method for automatically matching the running speed of the inlet section of a continuous retreat unit, characterized by comprising the following steps:

[0048] Acquisition module: used to obtain the running speed of the annealing furnace, the total length of the steel coil and the remaining length of the looper;

[0049] Calculation module: used to obtain the entrance section running speed based on the running speed of the annealing furnace, the total length of the steel coil and the remaining length of the looper through the entrance section running speed calculation formula.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 control method for automatic matching of the running speed of the inlet section of a continuous retreat unit, characterized in that: The following steps are involved: The inlet section equipment of the continuous annealing unit includes: an uncoiler, a welder, a cleaning section module, a looper and an annealing furnace; The output end of the welding machine is connected to the input end of the uncoiler, the output end of the uncoiler is connected to the input end of the cleaning section module, the output end of the cleaning section module is connected to the input end of the looper, and the output end of the looper is connected to the annealing furnace; The control method process based on the automatic matching of the inlet section running speed of the inlet section equipment of the continuous retreat unit is as follows: Obtain the running speed of the annealing furnace, the total length of the steel coil and the remaining length of the looper; Based on the running speed of the annealing furnace, the total length of the steel coil and the remaining length of the looper, the running speed of the entry section is calculated by the formula for calculating the running speed of the entry section; The calculation formula of the inlet section running speed is as follows: Since the annealing furnace is also running during the uncoiling and sleeve punching process of the uncoiling machine, assuming that the time to fill the sleeve is t, we can get: L payoff =L loop +V furnace *t(1) t=(L payoff -L loop ) / V furnace (2) V entry =L payoff / t+V offset (3) Where, L payoff : Remaining length of uncoiler; L loop : The length required for the loop to be fully set; V furnace : Annealing furnace running speed; V entry : Running speed of the inlet section, V offset : Speed ​​deviation compensation; The speed deviation compensation V offset It is determined based on the relationship between the loop filling time and the unwinding completion time of the uncoiler.

2. A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein: When the computer program is running, the control method for automatically matching the running speed of the inlet section of the continuous retreat unit described in claim 1 is executed.

3. According to claim 1, a control method and control device for automatically matching the running speed of the inlet section of a continuous quenching unit, characterized in that: include: Acquisition module: used to obtain the running speed of the annealing furnace, the total length of the steel coil and the remaining length of the looper; Calculation module: used to obtain the entrance section running speed based on the running speed of the annealing furnace, the total length of the steel coil and the remaining length of the looper through the entrance section running speed calculation formula.

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