High-speed wire pinch roll device and process control method

Abstract

The present invention provides a high-wire pinch roller device and a process control method, the high-wire pinch roller device comprising: a finishing mill; a plurality of water tanks, which are sequentially arranged along the discharge direction of the finishing mill and are all located at the downstream position of the finishing mill; a rear pinch roller of the finishing mill, which is arranged at the discharge port of the finishing mill; a plurality of rear pinch rollers of the water tank, and a rear pinch roller of the water tank is arranged between every two adjacent water tanks; a laying head assembly, which is arranged at the downstream position of the water tank at the end along the discharge direction. The beneficial effect of the present invention is that in the embodiment of the present invention, the non-cooling section of the rolled piece is only about the length of one water tank (about 6 meters), which is much less than about 50 meters of conventional control, thereby effectively reducing the length of the non-cooling section of the rolled piece, effectively improving the yield rate of the product and ensuring the stable operation of the rolled piece during transportation.

Description

Technical Field

[0001] The invention relates to the field of metallurgical steel rolling, and in particular to a high-wire pinch roller device and a process control method. Background Art

[0002] In the production of high-speed wire rods, after the finished product is rolled out by the finishing mill, the rolled product needs to be water-cooled to obtain better physical properties of the product. Figure 1 It is mainly composed of a finishing mill unit 1, a first water tank 2, a second water tank 3, a conveying guide trough 4, a third water tank 5, a fourth water tank 6, a front pinch roller 7 of a laying head, and a laying head 8.

[0003] After being rolled out from the finishing mill 1, the rolled piece passes through the first water tank 2 to the fourth water tank 6, the conveying guide trough 4, and the pinch rollers and enters the laying machine 8 to lay the rolled piece into a coil and enter the downstream process.

[0004] The first water tank 2 to the fourth water tank 6 have their own control valve groups to open and close the cooling water in the water tank. Since the rolled piece needs to overcome the water resistance when passing through the water tank, the existing process control method is to close the pinch roller 7 before the head of the rolled piece reaches the laying head, so that the rolled piece forms tension between the finishing mill 1 and the laying head 8, and then the first water tank 2 to the fourth water tank 6 are opened. This method is mainly to prevent the rolled piece from shaking or piling up in the water tank.

[0005] The above process layout and control method have the following problems:

[0006] 1. The rolled piece enters the back of the laying head 8 and is cooled by boiling water in the first water tank 2 to the fourth water tank 6. This way, the cooling intensity of the rolled piece head is insufficient, so the product performance does not meet the requirements (the length of the head non-cooling section is about 50 meters from the finishing mill 1 to the laying head 8). This 50-meter-long rolled piece needs to be removed in the downstream process, which reduces the yield rate of the production line.

[0007] 2. During the process of conveying the head of the rolled piece to the laying head 8, the rolled piece slides in the water tank and the conveying guide groove 4. Due to the long distance (about 50 meters), the rolled piece is prone to shaking or even steel piling accidents. Summary of the invention

[0008] The present invention provides a high-speed wire pinch roller device and a process control method, so as to achieve the purpose of effectively reducing the length of the non-cooling section of the rolled piece and ensuring the stable operation of the rolled piece during the conveying process.

[0009] The technical solution adopted by the present invention to solve its technical problems is as follows: A high-speed wire pinch roll device, comprising: a finishing mill unit; a plurality of water tanks, which are arranged in sequence along the outgoing direction of the finishing mill unit and are all located downstream of the finishing mill unit; a pinch roll behind the finishing mill unit, which is arranged at the outgoing opening of the finishing mill unit; a plurality of pinch rolls behind the water tanks, and one pinch roll behind the water tank is arranged between every two adjacent water tanks; a wire laying machine assembly, which is arranged downstream of the last water tank along the outgoing direction.

[0010] Further, the plurality of water tanks include a first water tank, a second water tank, a third water tank, and a fourth water tank arranged in sequence. The pinch roll behind the finishing mill unit is located between the outgoing opening of the finishing mill unit and the first water tank, and the pinch roll behind the finishing mill unit is arranged close to the first water tank.

[0011] Further, a first pinch roll behind the water tank is arranged between the first water tank and the second water tank, and the first pinch roll behind the water tank is connected to both the outgoing opening of the first water tank and the incoming opening of the second water tank.

[0012] Further, a second pinch roll behind the water tank is arranged between the second water tank and the third water tank. The second pinch roll behind the water tank is connected to the outgoing opening of the second water tank, and the second pinch roll behind the water tank is connected to the incoming opening of the third water tank through a conveying guide groove.

[0013] Further, a third pinch roll behind the water tank is arranged between the third water tank and the fourth water tank. The third pinch roll behind the water tank is connected to the outgoing opening of the third water tank, and the third pinch roll behind the water tank is connected to the incoming opening of the fourth water tank through a conveying guide groove.

[0014] Further, the fourth water tank is connected to the wire laying machine assembly through a conveying guide groove.

[0015] Further, the wire laying machine assembly includes a pinch roll in front of the wire laying machine and a wire laying machine arranged in sequence along the outgoing direction.

[0016] The present invention also provides a process control method for a high-speed wire pinch roll. The above high-speed wire pinch roll device is used for operation. The process control method for the high-speed wire pinch roll includes the following steps: Step 10: Close the pinch roll behind the finishing mill unit and the plurality of pinch rolls behind the water tanks in place in advance; Step 20: Center-align the rolled piece sent out by the finishing mill unit through the pinch roll behind the finishing mill unit and then send it into the first water tank; Step 30: After the head of the rolled piece enters the pinch roll behind the first water tank, let water flow into the first water tank; after the head of the rolled piece enters the pinch roll behind the second water tank, let water flow into the second water tank; after the head of the rolled piece enters the pinch roll behind the third water tank, let water flow into the third water tank; Step 40: After the head of the rolled piece enters the wire laying machine assembly, let water flow into the fourth water tank.

[0017] The beneficial effect of the present invention is that, in the embodiment of the present invention, the non-cooling section of the rolled piece is only about the length of a water tank (about 6 meters), which is much less than the conventional control of about 50 meters, thereby effectively reducing the length of the non-cooling section of the rolled piece, effectively improving the product yield and ensuring the stable operation of the rolled piece during the transportation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a structural schematic diagram of the prior art;

[0020] Figure 2 It is a schematic structural diagram of an embodiment of the present invention.

[0021] Reference numerals in the figure: 1, finishing mill; 2, first water tank; 3, second water tank; 4, conveying guide trough; 5, third water tank; 6, fourth water tank; 7, front pinch roller of laying head; 8, laying head; 31, rear pinch roller of finishing mill; 32, rear pinch roller of first water tank; 33, rear pinch roller of second water tank; 34, rear pinch roller of third water tank. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can 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.

[0023] like Figure 2 As shown, an embodiment of the present invention provides a high-speed wire pinch roller device, comprising: a finishing mill 1, a plurality of water tanks, a pinch roller 31 after the finishing mill, a plurality of pinch rollers after the water tank, and a laying head assembly. The plurality of water tanks are sequentially arranged along the discharge direction of the finishing mill 1 and are all located downstream of the finishing mill 1. The pinch roller 31 after the finishing mill is arranged at the discharge port of the finishing mill 1. A pinch roller after the water tank is arranged between every two adjacent water tanks. The laying head assembly is arranged downstream of the water tank at the end along the discharge direction.

[0024] In the embodiment of the present invention, the non-cooling section of the rolled piece is only about the length of a water tank (about 6 meters), which is much less than the conventional control of about 50 meters. This can effectively reduce the length of the non-cooling section of the rolled piece, effectively improve the product yield and ensure the stable operation of the rolled piece during the transportation process.

[0025] Specifically, the multiple water tanks include a first water tank 2, a second water tank 3, a third water tank 5 and a fourth water tank 6 which are arranged in sequence, and the rear clamping roller 31 of the finishing mill is located between the outlet of the finishing mill 1 and the first water tank 2, and the rear clamping roller 31 of the finishing mill is arranged close to the first water tank 2.

[0026] The pinch roll 31 after the finishing mill can center the rolled piece (about 950°C) with a higher temperature exiting the finishing mill 1 (centering with the center line of the first water tank 2) and then send it into the first water tank 2, enabling better cooling of the rolled piece.

[0027] A pinch roll 32 after the first water tank is provided between the first water tank 2 and the second water tank 3, and the pinch roll 32 after the first water tank is connected to both the outlet of the first water tank 2 and the inlet of the second water tank 3. A pinch roll 33 after the second water tank is provided between the second water tank 3 and the third water tank 5, and the pinch roll 33 after the second water tank is connected to the outlet of the second water tank 3. The pinch roll 33 after the second water tank is connected to the inlet of the third water tank 5 through a conveying guide groove 4. A pinch roll 34 after the third water tank is provided between the third water tank 5 and the fourth water tank 6, and the pinch roll 34 after the third water tank is connected to the outlet of the third water tank 5. The pinch roll 34 after the third water tank is connected to the inlet of the fourth water tank 6 through a conveying guide groove 4.

[0028] After the rolled piece passes through the pinch roll 32 after the first water tank (judged by the pinch roll current signal), the first water tank 2 immediately starts to supply water. Similarly, after the rolled piece passes through the pinch roll 32 after the second water tank, the second water tank 3 immediately starts to supply water, and so on.

[0029] In the above way, the non-cooling section of the rolled piece is only about the length of one water tank (about 6 meters), which is much less than about 50 meters in conventional control, effectively improving the yield rate of the product. And the conveying stability of the rolled piece is also greatly improved, reducing the accident rate of the rolling line.

[0030] Moreover, the embodiment of the present invention adopts the method of pre-closing the pinch rolls, that is, all the pinch rolls are closed in place before the head of the rolled piece exits the finishing mill 1. The speed of the pinch rolls has a certain lead rate compared to the speed of the rolled piece (for example: the lead rate is 5%, lead rate = (pinch roll speed - rolled piece speed) / rolled piece speed), and this lead rate is used to compensate for the dynamic speed drop after the rolled piece instantaneously bites into the pinch rolls.

[0031] Specifically, the fourth water tank 6 is connected to the coiler assembly through a conveying guide groove 4. The coiler assembly includes a pinch roll 7 before the coiler and a coiler 8 arranged in sequence along the outlet direction.

[0032] The embodiment of the present invention also provides a high-speed wire pinch roll process control method, which operates using the above-mentioned high-speed wire pinch roll device. The high-speed wire pinch roll process control method includes the following steps:

[0033] Step 10: Pre-close the pinch roll 31 after the finishing mill and the pinch rolls after multiple water tanks in place;

[0034] Step 20: Center the rolled piece sent out by the finishing mill 1 through the pinch roll 31 after the finishing mill and then send it into the first water tank 2;

[0035] Step 30: After the head of the workpiece to be rolled enters the pinch roll 32 behind the first water tank, water is supplied to the first water tank 2; after the head of the workpiece to be rolled enters the pinch roll 33 behind the second water tank, water is supplied to the second water tank 3; after the head of the workpiece to be rolled enters the pinch roll 34 behind the third water tank, water is supplied to the third water tank 5.

[0036] Step 40: After the head of the workpiece to be rolled enters the coiler assembly, water is supplied to the fourth water tank 6.

[0037] Through the above control method, the non-cooling section of the rolled piece is only about the length of one water tank (about 6 meters), which is much less than about 50 meters in conventional control, effectively improving the yield rate of the product. And by adding pinch rolls for a new process layout and changing the original control method, the conveying stability of the rolled piece is also greatly improved, reducing the accident rate of the rolling line.

[0038] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: In the embodiments of the present invention, the non-cooling section of the rolled piece is only about the length of one water tank (about 6 meters), which is much less than about 50 meters in conventional control, so that the length of the non-cooling section of the rolled piece can be effectively reduced, the yield rate of the product can be effectively improved, and the stable operation of the rolled piece during the conveying process can be ensured.

[0039] The above is only a specific embodiment of the present invention and cannot be used to limit the scope of the invention implementation. Therefore, the replacement of equivalent components or equivalent changes and modifications made according to the scope of protection of the present invention patent should still fall within the scope covered by this patent. In addition, the technical features in the present invention can be freely combined with each other between technical features, between technical features and technical solutions, and between technical solutions.

Claims

1. A process control method for a high-speed wire pinch roll device, characterized in that the high-speed wire pinch roll device includes: a finishing mill group (1); a plurality of water tanks, which are arranged in sequence along the outgoing direction of the finishing mill group (1) and are all located downstream of the finishing mill group (1); a pinch roll after the finishing mill group (31), which is arranged at the outgoing opening of the finishing mill group (1); a plurality of pinch rolls after the water tanks, and one of the pinch rolls after the water tanks is arranged between every two adjacent water tanks; a wire laying head assembly, which is arranged downstream of the water tank at the end along the outgoing direction; the plurality of water tanks include a first water tank (2), a second water tank (3), a third water tank (5) and a fourth water tank (6) arranged in sequence. The pinch roll after the finishing mill group (31) is located between the outgoing opening of the finishing mill group (1) and the first water tank (2), and the pinch roll after the finishing mill group (31) is arranged close to the first water tank (2); the process control method for the high-speed wire pinch roll device includes the following steps: Step 10: Pre-close the pinch roll after the finishing mill group (31) and the plurality of pinch rolls after the water tanks in place; Step 20: Center-align the rolled piece sent out by the finishing mill group (1) through the pinch roll after the finishing mill group (31) and then send it into the first water tank (2); Step 30: After the head of the rolled piece enters the pinch roll after the first water tank (32), conduct water supply to the first water tank (2); after the head of the rolled piece enters the pinch roll after the second water tank (33), conduct water supply to the second water tank (3); after the head of the rolled piece enters the pinch roll after the third water tank (34), conduct water supply to the third water tank (5); Step 40: After the head of the rolled piece enters the wire laying head assembly, conduct water supply to the fourth water tank (6).

2. The process control method of the high-line pinch roll device according to claim 1, characterized in that A pinch roll after the first water tank (32) is arranged between the first water tank (2) and the second water tank (3), and the pinch roll after the first water tank (32) is connected to both the outgoing opening of the first water tank (2) and the incoming opening of the second water tank (3).

3. The process control method of the high-line pinch roll device according to claim 2, characterized in that, A pinch roll after the second water tank (33) is arranged between the second water tank (3) and the third water tank (5), the pinch roll after the second water tank (33) is connected to the outgoing opening of the second water tank (3), and the pinch roll after the second water tank (33) is connected to the incoming opening of the third water tank (5) through a conveying guide groove (4).

4. The process control method of the high-line pinch roll device according to claim 3, characterized in that, A pinch roll after the third water tank (34) is arranged between the third water tank (5) and the fourth water tank (6), the pinch roll after the third water tank (34) is connected to the outgoing opening of the third water tank (5), and the pinch roll after the third water tank (34) is connected to the incoming opening of the fourth water tank (6) through a conveying guide groove (4).

5. The process control method of the high-line pinch roll device according to claim 1, characterized in that, The fourth water tank (6) is connected to the wire laying head assembly through a conveying guide groove (4).

6. The process control method of the high-line pinch roll device according to claim 1, characterized in that, The wire laying head assembly includes a pinch roll before the wire laying head (7) and a wire laying head (8) arranged in sequence along the outgoing direction.

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