Flying plate protection control device in rolling process

Abstract

The utility model discloses a flying plate protection control device in the rolling process, which comprises a first detection unit, a second detection unit and a rolling mill which are sequentially arranged along the rolling direction of a cold rolling line, and is characterized in that the first detection unit is used for generating a first signal when no steel plate is detected; the second detection unit is used for generating a second signal when no steel plate is detected; the PLC control unit is electrically connected with the first detection unit and the second detection unit and is used for receiving the first signal and the second signal and generating a shutdown signal according to the first signal and the second signal; the PLC control unit is further electrically connected with the rolling mill and used for sending a stop signal to the rolling mill to control the rolling mill to stop. The first detection unit and the second detection unit are innovatively arranged at the upstream position of the rolling mill, the first detection unit and the second detection unit are used for detecting the position of the steel plate and feeding back the signal to the PLC control unit, so that the rolling mill is controlled to stop according to the signal, and plate flying is prevented on the premise of the product yield.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling mills, in particular to a flying plate protection control device during the rolling process. Background Art

[0002] During normal operation, the rolling mill needs to unwind the pickled coil. The existing rolling mill unwinds the coil from the entrance unwinder and rolls it to the exit tension roller. However, when rolling to the end of the coil, it is difficult to control the distance from the tail of the coil to the working roller. If the distance is too long, the production yield will be low and fail to meet the company's requirements.

[0003] In actual operation, in order to improve the production yield, the tail of the plate is kept as short as possible. However, after all, on-site operators are manual operators, and it is inevitable that mistakes will easily cause the plate to fly, which will lead to damage to the working roll, scratches on the surface of the steel coil, and loose steel coils. In severe cases, it will also cause damage to the back roll, which will cause serious losses to the company. Utility Model Content

[0004] In order to overcome the above technical defects, the purpose of the present invention is to provide a flying plate protection control device during the rolling process, which is used to solve the problem of preventing flying plates while ensuring the product yield in the background technology.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] The utility model discloses a flying plate protection control device during rolling, comprising:

[0007] A first detection unit, a second detection unit and a rolling mill are sequentially arranged along the rolling direction of the cold rolling line, wherein:

[0008] The first detection unit is used to generate a first signal when no steel plate is detected; the second detection unit is used to generate a second signal when no steel plate is detected;

[0009] A PLC control unit is electrically connected to the first detection unit and the second detection unit, and is used to receive and generate a shutdown signal based on the first signal and the second signal; the PLC control unit is also electrically connected to the rolling mill, and is used to send a shutdown signal to the rolling mill to control the rolling mill to stop.

[0010] Compared with the existing technology, the present application innovatively sets a first detection unit and a second detection unit at the upstream position of the rolling mill, uses the first detection unit and the second detection unit to detect the position of the steel plate and feeds the signal back to the PLC control unit, so as to control the rolling mill to stop according to the signal, and prevent flying plates while ensuring the product yield.

[0011] In one embodiment, the first detection unit is a CPC in the cold rolling line.

[0012] In one embodiment, the rolling mill is provided with a working roll and a thickness gauge, wherein the thickness gauge is provided upstream of the working roll;

[0013] The second detection unit is disposed at the thickness gauge, and the second detection unit includes a light emitter and a light receiver.

[0014] In one embodiment, the distance from the first detection unit to the working roll is D1, the distance from the second detection unit to the working roll is D2, and D1 is set larger than D2.

[0015] In one embodiment, the flying plate protection control device during the rolling process also includes a display screen, which is electrically connected to the PLC control unit; the display screen has a display diagram simulating the cold rolling line, and the display diagram displays the real-time status of the second detection unit.

[0016] In one embodiment, the cold rolling line includes an entry uncoiler, a leveler, an entry tension roller and an exit tension roller, wherein the entry uncoiler, the leveler and the entry tension roller are all located upstream of the first detection unit, and the exit tension roller is located downstream of the rolling mill.

[0017] In one embodiment, the PLC control unit is a Mitsubishi Q series PLC controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the flying plate protection control device during the rolling process of the utility model;

[0020] Figure 2 This is a schematic diagram of the flying plate protection control device during the rolling process of the utility model.

[0021] Description of reference numerals:

[0022] 10 First detection unit, 20 Second detection unit, 30 Rolling mill, 310 Working roll, 320 Thickness gauge, 40 PLC control unit, 50 Display screen, 610 Entry uncoiler, 620 Leveler, 630 Entry tension roller, 640 Exit tension roller. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0024] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0025] It should be clear that the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the embodiments of the present application.

[0026] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present application. The singular forms "a," "the," and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0027] In addition, in this application, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0028] Combine Figure 1 and Figure 2 As shown, the utility model discloses a flying plate protection control device during the rolling process, comprising: a first detection unit 10, a second detection unit 20 and a rolling mill 30 are sequentially arranged along the rolling direction of the cold rolling line, wherein the first detection unit 10 is used to generate a first signal when no steel plate is detected; the second detection unit 20 is used to generate a second signal when no steel plate is detected; a PLC control unit, which is electrically connected to the first detection unit 10 and the second detection unit 20, and is used to receive and generate a shutdown signal based on the first signal and the second signal; the PLC control unit is also electrically connected to the rolling mill 30, and is used to send a shutdown signal to the rolling mill 30 to control the rolling mill 30 to stop.

[0029] Compared with the prior art, the present application innovatively sets a first detection unit 10 and a second detection unit 20 at the upstream position of the rolling mill 30, and uses the first detection unit 10 and the second detection unit 20 to detect the position of the steel plate and feed back the signal to the PLC control unit, so as to control the rolling mill 30 to stop according to the signal, thereby preventing flying plates while ensuring the product yield.

[0030] In one embodiment, the first detection unit 10 is a CPC in the cold rolling line. This embodiment utilizes the CPC in the cold rolling line to detect the steel plate through the photoelectric sensor of the CPC to determine whether there is a steel plate passing through the CPC; when the CPC cannot detect the steel plate, it generates a first signal and transmits the first signal back to the PLC control unit.

[0031] In one embodiment, the rolling mill 30 is equipped with work rolls 310 and a thickness gauge 320, wherein the thickness gauge 320 is disposed upstream of the work rolls 310. The second detection unit 20 is disposed at the thickness gauge 320 and includes a light emitter and a light receiver. In this embodiment, the light emitter and light receiver detect the steel plate at the thickness gauge 320 to determine whether a steel plate passes through the thickness gauge 320 (i.e., upstream of the work rolls 310). When the light receiver receives light emitted by the light emitter, indicating that no steel plate is detected, a second signal is generated and transmitted as feedback to the PLC control unit.

[0032] It should be noted that both the first detection unit 10 and the second detection unit 20 use optical detection sensors for detection, and the signal is fed back to the PLC control unit in the form of "high level" and "low level". This application does not limit the acquisition and processing methods of the above signals.

[0033] Furthermore, the distance between the first detection unit 10 and the working roll 310 is D1, and the distance between the second detection unit 20 and the working roll 310 is D2, where D1 is set larger than D2. In this embodiment, by arranging the first detection unit 10 and the second detection unit 20 at different positions, the distance between the first detection unit 10 and the working roll 310 is correspondingly different from the distance between the second detection unit 20 and the working roll 310. This allows the steel plate to be inspected at two different positions in front of the working roll 310, achieving dual protection. Even if a problem occurs in one of the detection units, the flying plate phenomenon will not occur.

[0034] In one embodiment, the flying plate protection control device during rolling further includes a display screen 50, which is electrically connected to the PLC control unit. The display screen 50 includes a display diagram simulating the cold rolling line, which displays the real-time status of the second detection unit 20. This embodiment utilizes the display screen 50 to obtain parameter data from the PLC control unit and displays it on the display screen 50, allowing the operator to see in real time whether the second detection unit 20 is functioning properly. Furthermore, the display screen 50 includes a display diagram simulating the cold rolling line, which displays the real-time status of the second detection unit 20, allowing the operator to quickly understand the detection status of the second detection unit 20.

[0035] In one embodiment, in one embodiment, the cold rolling line includes an entrance uncoiler 610, a leveler 620, an entrance tension roller 630 and an exit tension roller 640, the entrance uncoiler 610, the leveler 620 and the entrance tension roller 630 are all located upstream of the first detection unit 10, and the exit tension roller 640 is located downstream of the rolling mill 30.

[0036] In this embodiment, the steel coil is uncoiled by the entrance uncoiler 610 and transported to the leveler 620. The leveler 620 leveled the steel plate, and the steel plate passed through the first inspection unit 10, the second inspection unit 20, and the thickness gauge 320 in sequence before entering the rolling mill 30 to be rolled by the working roll 310.

[0037] In one embodiment, the PLC control unit is a Mitsubishi Q series PLC controller.

[0038] The working principle of the flying plate protection control device during the rolling process of the present application is to use the on-site CPC's own photoelectric sensor for detection. It can detect whether there is a steel plate on it. When no steel plate is detected, a first signal will be output. By using the first signal and measuring the distance between the CPC and the working roll 310 and the set speed of the rolling mill 301pss at the end, a stop signal can be generated immediately or with a delay of 9 seconds to stop the rolling mill 30Q-STOP from working, thereby achieving the first level of protection to prevent flying plates.

[0039] Furthermore, the present application also includes a second level of protection: a second detection unit 20 is added at the thickness gauge 320 for detection, and it is used to detect whether there is a steel plate on it. By measuring the distance between the thickness gauge 320 and the working roll 310 and the set speed of the rolling mill 301pss at the end, a stop signal can be generated immediately, or a stop signal can be generated with a delay of 0.5 seconds to stop the rolling mill 30N-STOP from working, thereby achieving a second level of protection, preventing the flying plate from approaching the working roll 310 while ensuring the product yield.

[0040] It should be noted that the above delays of 9 seconds and 0.5 seconds can be adjusted and may vary depending on the actual situation.

[0041] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and any modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are for convenience of description only and do not constitute any limitation to the present invention.

Claims

1. A flying plate protection control device during rolling, which is applied to a cold rolling line, characterized in that: include: A first detection unit, a second detection unit and a rolling mill are sequentially arranged along the rolling direction of the cold rolling line, wherein: The first detection unit is used to generate a first signal when no steel plate is detected; the second detection unit is used to generate a second signal when no steel plate is detected; A PLC control unit is electrically connected to the first detection unit and the second detection unit, and is used to receive and generate a shutdown signal based on the first signal and the second signal; the PLC control unit is also electrically connected to the rolling mill, and is used to send a shutdown signal to the rolling mill to control the rolling mill to stop.

2. The flying plate protection control device during rolling according to claim 1, characterized in that: The first detection unit is a CPC in the cold rolling line.

3. The flying plate protection control device during rolling according to claim 1, characterized in that: The rolling mill is provided with a working roll and a thickness gauge, wherein the thickness gauge is provided upstream of the working roll; The second detection unit is disposed at the thickness gauge, and the second detection unit includes a light emitter and a light receiver.

4. The flying plate protection control device during rolling according to claim 3, characterized in that: The distance between the first detection unit and the working roll is D1, the distance between the second detection unit and the working roll is D2, and D1 is set larger than D2.

5. The flying plate protection control device during rolling according to claim 1, characterized in that: The flying plate protection control device during the rolling process also includes a display screen, which is electrically connected to the PLC control unit; the display screen has a display diagram simulating the cold rolling line, and the display diagram shows the real-time status of the second detection unit.

6. The flying plate protection control device during rolling according to claim 1, characterized in that: The cold rolling line includes an entrance uncoiler, a leveler, an entrance tension roller and an exit tension roller, wherein the entrance uncoiler, the leveler and the entrance tension roller are all located upstream of the first detection unit, and the exit tension roller is located downstream of the rolling mill.

7. The flying plate protection control device during rolling according to claim 1, characterized in that: The PLC control unit is a Mitsubishi Q series PLC controller.

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