Scram device for strip breakage of withdrawal and straightening machine of continuous pickling line and use method of scram device

Abstract

The invention provides a continuous pickling line withdrawal and straightening machine belt breakage emergency stop device and a using method thereof.The continuous pickling line withdrawal and straightening machine belt breakage emergency stop device comprises a withdrawal and straightening machine body, a first tensioning roller is arranged on the left side of the bottom of the withdrawal and straightening machine body, a second tensioning roller is arranged on the right side of the bottom of the withdrawal and straightening machine body, and a photoelectric sensor is arranged on the right side of the bottom of the second tensioning roller; an acid tank body is arranged on the right side of the photoelectric sensor, and a third tensioning roller is arranged on the right side of the acid tank body. An encoder is installed through a second tensioning roller to measure the speed, a third roller bearing seat of the second tensioning roller is a first vertical bearing seat, a first pressure head sensor is installed to measure the tension at a withdrawal and straightening machine body, a first roller bearing seat of a third tensioning roller is a second vertical bearing seat, and a second pressure head sensor is installed to measure the tension at a pickling machine body. A control system is formed through detection and judgment of speed, tension and a photoelectric sensor, strip steel can be judged to be broken at the position by measuring that the speed and the tension are smaller than the judgment condition, and the strip steel at the withdrawal and straightening machine body can be rapidly controlled to stop running.

Description

Technical Field

[0001] The invention relates to the technical field of cold-rolled strip pickling production, and in particular to a strip breaking emergency stop device for a straightening machine of a continuous pickling unit and a use method thereof. Background Art

[0002] The tension leveler has two functions. First, by applying a certain elongation to the metal material, the shortest fiber in the material is made consistent with the longest fiber length, thereby eliminating the flatness defect. Second, by different elongation rates and bending on small-diameter working rolls, cracks are produced on the iron oxide scale on the surface of the hot-rolled steel plate, so that the acid can penetrate better during pickling, thereby improving the pickling efficiency.

[0003] Because the strip needs to have a certain elongation and phosphorus breaking, the tension and bending of the strip at the straightening machine are relatively large, which makes it easy for the strip to break at the straightening machine due to defects such as the strip weld or edge loss. If the strip cannot be stopped quickly after the straightening machine breaks, the distance between the two ends of the broken strip will gradually increase. In order to resume production, the two ends of the strip should be welded close together, which will increase the preparation time for resuming production. At the same time, the broken strip is prone to loss of on-site equipment during operation.

[0004] Therefore, we make improvements on this and propose a belt breaking emergency stop device for the straightening machine of a continuous pickling unit and a method for using the device. Summary of the invention

[0005] The purpose of the present invention is to: the tension and bending of the strip at the straightening machine are relatively large, so that the strip is prone to breakage at defective locations such as the weld or edge loss of the strip. If the strip cannot be stopped quickly after the straightening machine breaks, the distance between the two ends of the broken strip will gradually increase. In order to resume production, the two ends of the strip should be welded close together, which will increase the preparation time for resuming production. At the same time, the broken strip is prone to loss of on-site equipment during operation.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] A belt breaking emergency stop device for a straightening machine of a continuous pickling unit and a method of using the same are provided to improve the above problems.

[0008] The specific application is as follows:

[0009] It includes a straightening machine body, a first tensioning roller is arranged on the left side of the bottom of the straightening machine body, a second tensioning roller is arranged on the right side of the bottom of the straightening machine body, a photoelectric sensor is arranged on the right side of the bottom of the second tensioning roller, an acid tank body is arranged on the right side of the photoelectric sensor, a third tensioning roller is arranged on the right side of the acid tank body, and a PLC controller is arranged on the top of the straightening machine body.

[0010] The speed is measured by installing an encoder on the second tensioning roller. The bearing seat of the second tensioning roller No. 3 is the first vertical bearing seat. The first pressure head sensor is installed to measure the tension at the straightening machine body. The bearing seat of the third tensioning roller No. 1 is the second vertical bearing seat. The second pressure head sensor is installed to measure the tension at the acid tank body. The control system is composed of speed and tension detection and judgment. By measuring that the speed and tension are less than the judgment conditions, it can be judged that the strip is broken at this point, and the strip at the straightening machine body can be quickly controlled to stop running.

[0011] As a preferred embodiment of the continuous pickling unit straightening machine broken belt emergency stop device and its use method provided by the present invention, a first vertical bearing seat is provided on one side of roller No. 3 of the second tensioning roller, and a first pressure head sensor is provided on one side of the first vertical bearing seat.

[0012] As a preferred embodiment of the continuous pickling unit straightening machine broken belt emergency stop device and its use method provided by the present invention, a second vertical bearing seat is provided on one side of roller No. 1 of the third tensioning roller, and a second pressure head sensor is provided on one side of the second vertical bearing seat.

[0013] As a preferred embodiment of the continuous pickling unit straightening machine broken belt emergency stop device and its use method provided by the present invention, an encoder is provided on one side of the second tensioning roller, and the encoder is used to measure the speed.

[0014] As a preferred embodiment of the belt breaking emergency stop device for the straightening machine of the continuous pickling unit provided by the present invention and the use method thereof, the first pressure head sensor is used to measure the tension at the straightening machine body.

[0015] As a preferred embodiment of the continuous pickling unit tension and leveling machine broken belt emergency stop device and the use method thereof provided by the present invention, the second pressure head sensor is used to measure the tension at the acid tank body.

[0016] A method for using a belt-breaking emergency stop device for a straightening machine of a continuous pickling unit, comprising the above-mentioned belt-breaking emergency stop device for a straightening machine of a continuous pickling unit, and the specific operation is as follows:

[0017] When in use, an encoder is installed on the second tensioning roller to measure the speed of the strip. The bearing seat of the second tensioning roller No. 3 is the first vertical bearing seat. The first pressure head sensor is installed to measure the tension at the straightening machine body. The bearing seat of the third tensioning roller No. 1 is the second vertical bearing seat. The second pressure head sensor is installed to measure the tension at the acid tank body. The control system is composed of speed and tension detection and judgment. By measuring the speed and tension less than the judgment condition, it can be judged that the strip is broken here, and the strip at the straightening machine body can be quickly controlled to stop running. The strip breaking judgment condition is to judge that the strip breaking in the straightening machine body area meets one of the following conditions, and the strip breaking protection condition is triggered: ① The speed of the second tensioning roller on the straightening machine body is ≥5 m / min, and the tension at the straightening machine body or the acid tank body is less than 2 tons, and the time lasts for 2 seconds; ② Speed ​​difference strip breaking condition: The speed difference between the main motor speed of the straightening machine body and the speed of the second tensioning roller is greater than 12 m / min; ③ Speed ​​difference and belt breaking condition: the speed difference between the main motor speed of the straightening machine body and the speed of the third tensioning roller is greater than 12 m / min; a driven roller is added at the outlet of the straightening machine body, and the roller speed difference is judged. The main motor of the straightening machine body, the first tensioning roller, the second tensioning roller and the third tensioning roller are measured by motor or roller encoder respectively. ④ A photoelectric sensor is added at the width center position of the straightening machine body outlet. The strip is blocked for no belt breakage and photoelectric reception for belt breakage; ⑤ When the strip speed is greater than 60 m / min, the threshold value of the current change rate of the main motor and the outlet tension motor is set to 25%. After further triggering the belt breaking condition, the corresponding action control is triggered, the first tensioning roller, the second tensioning roller and the third tensioning roller on the straightening machine body stop rotating, the tensioning roller pressure roller is pressed, and the strip stops urgently. The emergency stop rate stops from 280 m / min to 0 m / min within 3 seconds to prevent the strip from moving further.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the speed is measured by installing an encoder on the second tensioning roller, the bearing seat of roller No. 3 of the second tensioning roller is the first vertical bearing seat, and the first pressure head sensor is installed to measure the tension at the straightening machine body; the bearing seat of roller No. 1 of the third tensioning roller is the second vertical bearing seat, and the second pressure head sensor is installed to measure the tension at the acid tank body; the control system is composed of speed and tension detection and judgment, and by measuring that the speed and tension are less than the judgment conditions, it can be judged that the strip is broken at this point, and the strip at the straightening machine body can be quickly controlled to stop running. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the belt breaking emergency stop device of the straightening machine of the continuous pickling unit provided in the present application and its use method;

[0020] Figure 2 A schematic diagram of the second tensioning roller of the belt breaking emergency stop device of the straightening machine of the continuous pickling unit provided in the present application and the use method thereof;

[0021] Figure 3A schematic diagram of the third tensioning roller of the belt breaking emergency stop device of the straightening machine of the continuous pickling unit provided in the present application and the use method thereof;

[0022] Figure 4 A schematic diagram of photoelectric sensor detection for the continuous pickling unit straightening machine broken belt emergency stop device and its use method provided in this application.

[0023] Indicated in the figure:

[0024] 1. Straightening machine body; 2. First tensioning roller; 3. Second tensioning roller; 4. Photoelectric sensor; 5. Acid tank body; 6. Third tensioning roller; 7. PLC controller; 8. First vertical bearing seat; 9. First pressure head sensor; 10. Second vertical bearing seat; 11. Second pressure head sensor. DETAILED DESCRIPTION

[0025] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0026] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] As described in the background technology, the tension and bending of the strip at the straightening machine are relatively large, which makes it easy for the strip to break at the straightening machine due to defects such as the strip weld or edge loss. If the strip cannot be stopped quickly after the straightening machine occurs, the distance between the two ends of the broken strip will gradually increase. In order to resume production, the two ends of the strip should be welded close together, which will increase the preparation time for resuming production. At the same time, the broken strip is prone to loss of on-site equipment during operation.

[0031] In order to solve this technical problem, the present invention provides a belt breaking emergency stop device for a straightening machine of a continuous pickling unit and a use method thereof.

[0032] Specifically, please refer to Figure 1-4 The belt breaking emergency stop device of the straightening machine of the continuous pickling unit and the use method thereof specifically include: a straightening machine body 1, a first tensioning roller 2 is arranged on the left side of the bottom of the straightening machine body 1, a second tensioning roller 3 is arranged on the right side of the bottom of the straightening machine body 1, a photoelectric sensor 4 is arranged on the right side of the bottom of the second tensioning roller 3, an acid tank body 5 is arranged on the right side of the photoelectric sensor 4, a third tensioning roller 6 is arranged on the right side of the acid tank body 5, and a PLC controller 7 is arranged on the top of the straightening machine body 1.

[0033] The speed is measured by installing an encoder on the second tensioning roller 3. The No. 3 roller bearing seat of the second tensioning roller 3 is the first vertical bearing seat 8. The first pressure head sensor 9 is installed to measure the tension at the straightening machine body 1. The No. 1 roller bearing seat of the third tensioning roller 6 is the second vertical bearing seat 10. The second pressure head sensor 11 is installed to measure the tension at the acid tank body 5. The control system is composed of speed and tension detection and judgment. By measuring that the speed and tension are less than the judgment conditions, it can be judged that the strip is broken at this point, and the strip at the straightening machine body 1 can be quickly controlled to stop running.

[0034] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] Example 1

[0038] Please refer to Figure 1-4A belt breaking emergency stop device for a straightening machine of a continuous pickling unit and a method for using the same, comprising a straightening machine body 1, a first tensioning roller 2 is arranged on the left side of the bottom of the straightening machine body 1, a second tensioning roller 3 is arranged on the right side of the bottom of the straightening machine body 1, a photoelectric sensor 4 is arranged on the right side of the bottom of the second tensioning roller 3, an acid tank body 5 is arranged on the right side of the photoelectric sensor 4, a third tensioning roller 6 is arranged on the right side of the acid tank body 5, and a PLC controller 7 is arranged on the top of the straightening machine body 1. A first vertical bearing seat 8 is arranged on one side of the No. 3 roller of the second tensioning roller 3, and a first pressure head sensor 9 is arranged on one side of the first vertical bearing seat 8. A second vertical bearing seat 10 is arranged on one side of the No. 1 roller of the third tensioning roller 6, and a second pressure head sensor 11 is arranged on one side of the second vertical bearing seat 10. An encoder is arranged on one side of the second tensioning roller 3, and the encoder is used to measure the speed. The first pressure head sensor 9 is used to measure the tension at the straightening machine body 1. The second pressure head sensor 11 is used to measure the tension at the acid tank body 5.

[0039] During the implementation process, an encoder is installed on the second tensioning roller 3 to measure the speed. The bearing seat of the second tensioning roller 3 is the first vertical bearing seat 8. A first pressure head sensor 9 is installed to measure the tension at the straightening machine body 1. The No. 1 roller bearing seat of the third tensioning roller 6 is the second vertical bearing seat 10. A second pressure head sensor 11 is installed to measure the tension at the acid tank body 5. The control system is composed of speed, tension and photoelectric sensor detection and judgment. By measuring that the speed and tension are less than the judgment conditions, it can be judged that the strip is broken at this point, and the strip at the straightening machine body 1 can be quickly controlled to stop running.

[0040] When in use, an encoder is installed on the second tensioning roller 3 to measure the speed. The bearing seat of the second tensioning roller 3 is the first vertical bearing seat 8. A first pressure head sensor 9 is installed to measure the tension at the straightening machine body 1. The No. 1 roller bearing seat of the third tensioning roller 6 is the second vertical bearing seat 10. A second pressure head sensor 11 is installed to measure the tension at the acid tank body 5. The control system is composed of speed and tension detection and judgment. By measuring the speed and tension less than the judgment condition, it can be judged that the strip is broken at this point, and the strip from the straightening machine body 1 to the third tensioning roller 6 can be quickly controlled to stop running. The strip breaking judgment condition is to judge that the strip breaking in the straightening machine body 1 area meets one of the following conditions, and the strip breaking protection condition is triggered: ① The speed of the second tensioning roller 3 on the straightening machine body 1 is ≥5 m / min, and the tension at the straightening machine body 1 or the acid tank body 5 is less than 2 tons, and the time lasts for 2 seconds; ② Speed ​​difference strip breaking condition: The speed of the main motor of the straightening machine body 1 and the speed of the second tensioning roller 3 are different in speed. Greater than 12 m / min; ③ Speed ​​difference belt breaking condition: the speed of the main motor of the straightening machine body 1 and the speed of the third tensioning roller 6, the speed difference between the two is greater than 12 m / min; a driven roller is added at the outlet of the straightening machine body 1, and the roller speed difference is judged. The main motor of the straightening machine body 1, the first tensioning roller 2, the second tensioning roller 3 and the third tensioning roller 6 are respectively measured by the motor or roller encoder. ④ A photoelectric sensor 4 is added at the center position of the width of the straightening machine body 1 outlet. The strip is blocked for no belt breakage and the photoelectric reception is for belt breakage; ⑤ When the strip speed is greater than 60 m / min, the threshold value of the current change rate of the main motor and the outlet tension motor is set to 25%. After further triggering the belt breakage condition, the corresponding action control is triggered, the first tensioning roller 2, the second tensioning roller 3 and the third tensioning roller 6 on the straightening machine body 1 stop rotating, the tensioning roller pressure roller is pressed, and the strip stops urgently. The emergency stop rate stops from 280 m / min to 0 m / min within 3 seconds to prevent the strip from moving further.

[0041] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A belt breaking emergency stop device for a straightening machine of a continuous pickling unit, comprising a straightening machine body (1), characterized in that: A first tensioning roller (2) is arranged on the left side of the bottom of the straightening machine body (1), a second tensioning roller (3) is arranged on the right side of the bottom of the straightening machine body (1), a photoelectric sensor (4) is arranged on the right side of the bottom of the second tensioning roller (3), an acid tank body (5) is arranged on the right side of the photoelectric sensor (4), a third tensioning roller (6) is arranged on the right side of the acid tank body (5), and a PLC controller (7) is arranged on the top of the straightening machine body (1).

2. The belt breaking emergency stop device of the straightening machine of the continuous pickling unit according to claim 1 is characterized in that: A first vertical bearing seat (8) is arranged on one side of the No. 3 roller of the second tensioning roller (3), and a first pressure head sensor (9) is arranged on one side of the first vertical bearing seat (8).

3. The belt breaking emergency stop device of the straightening machine of the continuous pickling unit according to claim 1 is characterized in that: A second vertical bearing seat (10) is arranged on one side of the No. 1 roller of the third tensioning roller (6), and a second pressure head sensor (11) is arranged on one side of the second vertical bearing seat (10).

4. The belt breaking emergency stop device of the straightening machine of the continuous pickling unit according to claim 1 is characterized in that: An encoder is arranged on one side of the No. 3 roller of the second tensioning roller (3), and the encoder is used to measure the speed of the strip steel there. According to the continuous pickling unit straightening machine strip breaking emergency stop device as described in claim 1, it is characterized in that the main motor of the straightening machine body (1) is provided with an encoder, and the encoder is used to measure the strip speed here. According to the continuous pickling unit straightening machine strip break emergency stop device as described in claim 1, it is characterized in that an encoder is provided on the side of roller No. 1 of the third tensioning roller (6), and the encoder is used to measure the strip speed there.

5. The belt breaking emergency stop device of the straightening machine of the continuous pickling unit according to claim 2 is characterized in that: The first pressure head sensor (9) is used to measure the tension at the tension leveler body (1).

6. The belt breaking emergency stop device of the straightening machine of the continuous pickling unit according to claim 3 is characterized in that: The second pressure head sensor (11) is used to measure the tension at the acid tank body (5).

7. A method for using a belt breaking emergency stop device of a continuous pickling unit straightening machine, characterized in that: The belt breaking emergency stop device for the straightening machine of the continuous pickling unit according to claim 1 is specifically operated as follows: When in use, encoders are installed on the main motor, the second tensioning roller (3) and the third tensioning roller (6) of the straightening machine body (1) to measure the speed; the bearing seat of the No. 3 roller of the second tensioning roller (3) is the first vertical bearing seat (8); a first pressure head sensor (9) is installed to measure the tension at the straightening machine body (1); the bearing seat of the No. 1 roller of the third tensioning roller (6) is the second vertical bearing seat (10); a second pressure head sensor (11) is installed to measure the tension at the acid tank body (5); a control system is formed by speed and tension detection and judgment; when the measured speed and tension are less than the judgment conditions, it can be judged that the strip is broken at this location, and the strip at the straightening machine body (1) can be quickly controlled to stop running; the strip breaking judgment condition is to judge that the strip is broken in the straightening machine body (1) area and one of the following conditions is met, and the strip breaking protection condition is triggered: ① The roller speed of the second tension roller (3) on the tensioning and straightening machine body (1) is ≥ 5 m / min, and the tension at the tensioning and straightening machine body (1) or the acid tank body (5) is less than 2 tons, and the time lasts for 2 seconds; ② Speed ​​difference belt break condition: The speed difference between the main motor speed of the tensioning and straightening machine body (1) and the speed of the second tensioning roller (3) is greater than 12 m / min; ③ Conditions for strip breakage due to speed difference: the speed difference between the strip speed at the main motor of the straightening machine body (1) and the strip speed at the third tensioning roller (6) is greater than 12 m / min; a driven roller is added to the outlet of the straightening machine body (1), and the roller speed difference is judged. The speeds of the main motor of the straightening machine body (1), the first tensioning roller (2), the second tensioning roller (3) and the third tensioning roller (6) are measured respectively by motor or roller encoders. ④ A photoelectric sensor (4) is added to the outlet of the tension and straightening machine body (1). If the strip is blocked, it means the strip is not broken, and if the strip is received, it means the strip is broken; ⑤ When the strip speed is greater than 60 m / min, the threshold value of the current change rate of the main motor and the outlet tension motor is set to 25%. If it is greater than this value, it is judged as a broken strip; After the strip breaking condition is further triggered, the corresponding action control is triggered, the first tensioning roller (2), the second tensioning roller (3) and the third tensioning roller (6) on the tensioning and straightening machine body (1) stop rotating, the tensioning roller pressure roller is tightened, and the strip stops suddenly. The sudden stop rate stops from 280 m / min to 0 m / min within 3 seconds to prevent the strip from moving further.

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