Normalizing pickling unit entrance equipment and steel strip production line

Abstract

The utility model relates to a kind of normalizing pickling unit inlet equipment and steel strip production line, including feeding buffer unit, uncoiling preparation unit, transport unit, uncoiling unit, in-position detection unit and centering detection unit, it is matched through inlet steel coil preparation station section and uncoiler section, advance to complete strip head shearing, shorten the time of entry processing, make uncoiling speed match normalizing heat treatment section process speed, improve production efficiency.Equipment is aligned or vertically arranged according to center line, reduce interval and plant area, and do not need extra uncoiler or independent preparation unit, reduce equipment related cost.Rely on detection unit monitoring and centering device measurement, combined with steel coil car automatic transport, realize steel coil whole-process automation operation, reduce manual intervention, reduce labor intensity, improve operation precision and stability.

Description

Technical Field

[0001] This utility model relates to the technical field of steel strip rolling equipment, and in particular to an inlet device for a normalizing pickling unit and a strip steel production line. Background Technology

[0002] In the production process of cold-rolled high-grade silicon steel, normalizing is a crucial step. Its purpose is to improve the internal microstructure of the hot-rolled strip through heat treatment, eliminate work hardening, and lay a good microstructure foundation for subsequent cold rolling and annealing processes, ultimately ensuring that the silicon steel product obtains excellent electromagnetic properties. The normalizing pickling unit is the core equipment for realizing this process.

[0003] The raw material for the normalizing and pickling unit is hot-rolled silicon steel coils. However, due to the inherent instability of hot rolling mills at the beginning and end of the rolling process, the inherent equipment structure results in significant dimensional (such as thickness and width) deviations at the head and tail of the produced hot-rolled steel coils. If these dimensionally substandard strip sections enter the subsequent normalizing furnace and pickling section, they will not only affect the uniformity of heat treatment and pickling but also impair the performance consistency of the final product. Therefore, they must be precisely removed at the unit's inlet section.

[0004] Currently, the equipment for the inlet section of normalizing pickling units in the industry mainly includes the following solutions, but each has significant drawbacks: The first common solution is to configure only one uncoiler. While this solution meets the basic uncoiler function requirements and has a relatively low equipment investment, it exposes a serious efficiency bottleneck during production. Because the operations of shearing the strip head and tail sections that exceed tolerances (including positioning, stopping, shearing, and threading) are time-consuming, and the normalizing heat treatment section (such as the normalizing furnace) requires the strip to run continuously at a stable process speed, this results in a severe mismatch between the operating speed of the uncoiler section and the main line process speed. Frequent start-ups and shutdowns and low-speed operations of the uncoiler greatly restrict the overall production efficiency of the unit due to the limitations imposed by the inlet section, preventing the normalizing section from reaching its designed capacity.

[0005] The second solution, designed to address the speed mismatch, involves installing two uncoilers at the inlet section. By alternating winding and operation, continuous feeding can theoretically be achieved. However, while this solution improves production efficiency, it introduces new problems. The two uncoilers result in significant overcapacity, as only one is operational most of the time. Furthermore, to achieve the functionality of two uncoilers, a series of auxiliary equipment must be added, such as double shears, more complex belt winding aids, and steering pinch rollers. This makes the equipment layout at the inlet section exceptionally complex and increases the floor space required. This not only significantly increases the initial purchase and installation costs of the unit but also increases the difficulty and operating costs of subsequent equipment maintenance and repair, resulting in poor economic efficiency.

[0006] In addition, some technical solutions attempt to set up a separate preparation unit to pre-treat the heads of the steel coils. While this method can alleviate the speed pressure at the main line entrance, it leads to the decentralization of the production process, resulting in problems such as dispersed equipment layout, lengthy production lines, low space utilization, complex logistics management, and high investment and operating costs.

[0007] In summary, existing inlet equipment solutions for normalizing and pickling units struggle to balance production efficiency, equipment layout compactness, and investment and operating costs, exhibiting common industry pain points such as significant "efficiency bottlenecks" or "over-configuration." Therefore, there is an urgent need for an innovative inlet equipment solution that can optimize equipment configuration, achieve a compact layout of the inlet section, and minimize overall costs while ensuring efficient and continuous production. Utility Model Content

[0008] Therefore, the technical problem to be solved by this utility model is to overcome the common industry pain point that the inlet equipment scheme of the normal pickling unit in the prior art is difficult to balance between production efficiency, equipment layout compactness and investment and operation costs, and has obvious "efficiency bottleneck" or "over-configuration".

[0009] To solve the above-mentioned technical problems, this utility model provides an inlet device for a normalizing pickling unit, comprising, The feeding buffer unit includes a first saddle unit and a second saddle unit that are spaced apart along a first mounting line. Each of the first saddle unit and the second saddle unit includes two saddles symmetrically arranged on both sides of the first mounting line. An unwinding preparation unit is provided on the side of the second saddle unit away from the first saddle unit. The unwinding preparation unit includes a ground roller mechanism, a first guide plate, a first straightener and a head cutter arranged sequentially along a second mounting line perpendicular to the first mounting line. The ground roller mechanism includes two rollers symmetrically arranged on both sides of the first mounting line. A transport unit, the transport unit comprising a steel coil car, the steel coil car running along the first installation line; The unwinding unit includes an uncoiler, a second guide plate, and a second straightener arranged sequentially along a third mounting line perpendicular to the first mounting line. The central axis of the uncoiler is collinear with the first mounting line.

[0010] In one embodiment of the present invention, an in-situ detection unit is further included, which includes a plurality of in-situ detection sensors. The in-situ detection sensors are respectively provided on both sides of the first saddle unit, the second saddle unit, and the ground roller mechanism.

[0011] In one embodiment of this utility model, a centering detection unit is further included. The centering detection unit is disposed between the uncoiling preparation unit and the uncoiling unit. The centering detection unit includes a height detection sensor and a width detection sensor. Two height detection sensors are symmetrically arranged and are used to detect the two edge positions in the height direction of the steel coil, respectively. Two width detection sensors are symmetrically arranged and are used to detect the two edge positions in the width direction of the steel coil, respectively.

[0012] In one embodiment of this utility model, the in-situ detection sensor, height detection sensor, and width detection sensor may be infrared sensors, laser sensors, or vision sensors.

[0013] In one embodiment of the present invention, the ground roller mechanism includes two mounting seats symmetrically arranged on both sides of the first mounting line, the two roller shafts are respectively rotatably connected to the two mounting seats, and each roller shaft is connected to a drive source for driving its rotation.

[0014] In one embodiment of the present invention, the first guide plate includes a first guide plate body and a first hydraulic adjusting rod. One end of the first guide plate body is rotatably connected to a mounting base nearby, and the tail of the first hydraulic adjusting rod is rotatably connected to this mounting base, and its output end is rotatably connected to the bottom of the first guide plate body.

[0015] In one embodiment of the present invention, the second guide plate includes a second guide plate body and a second hydraulic adjusting rod. One end of the second guide plate body is rotatably connected to the second straightening machine. The tailstock of the second hydraulic rod is rotatably disposed on one side of the second straightening machine, and its output end is rotatably connected to the bottom of the second guide plate body.

[0016] In one embodiment of the present invention, the unwinding preparation unit further includes a waste collection device, which is disposed along the second mounting line on the side of the head cutter away from the first straightening machine.

[0017] In one embodiment of the present invention, the uncoiling unit further includes a flame heating device disposed along the third mounting line, and the flame heating device is located on the side of the uncoiling machine away from the second guide plate.

[0018] A steel strip production line includes the inlet equipment of the normalizing pickling unit as described in any of the above.

[0019] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: Good process speed matching: Through the coordinated operation of the inlet steel coil preparation station and the uncoiler section, the inlet steel coil preparation station completes the shearing of the steel coil head in advance, and the uncoiler section can directly carry out the uncoiling operation, which greatly shortens the total time of steel coil inlet processing, and enables the uncoiling speed to be precisely matched with the process speed of the normalizing heat treatment section, thereby improving the overall production efficiency of the unit.

[0020] The equipment layout is compact and cost-effective: the equipment sections are arranged in a center-line aligned or perpendicular manner, which greatly shortens the distance between the equipment and reduces the factory floor space; at the same time, there is no need to set up extra uncoilers or independent preparation units, which reduces the number of equipment, lowers the cost of equipment procurement, installation and subsequent maintenance, and maximizes economic efficiency.

[0021] High degree of automation: The inspection section monitors the position of the steel coil in real time, and the height and width alignment device accurately measures the size and position of the steel coil. Combined with the automatic transportation function of the steel coil car, the entire process of steel coil from storage, transportation, shearing to winding and unwinding is automated, reducing manual intervention, lowering the intensity of manual labor, and improving the accuracy and stability of operation. Attached Figure Description

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. Figure 1 This is a schematic diagram of the overall structure of the inlet equipment of the normalizing pickling unit according to a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the uncoiling preparation unit of the inlet equipment of the normalizing pickling unit according to a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the uncoiling unit of the inlet equipment of the normalizing pickling unit according to a preferred embodiment of the present invention.

[0023] Explanation of reference numerals in the accompanying drawings: 1. Feeding buffer unit; 11. First saddle unit; 12. Second saddle unit; 2. Uncoiling preparation unit; 21. Ground roller mechanism; 211. Roller shaft; 22. First guide plate; 23. First straightener; 24. Head cutter; 25. Waste collection device; 3. Transport unit; 31. Coil car; 4. Uncoiling unit; 41. Uncoiling machine; 42. Second guide plate; 43. Second straightener; 44. Flame heating device; 5. In-situ detection unit; 6. Centering detection unit; A. First installation line; B. Second installation line; C. Third installation line. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0025] Example 1, refer to Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides an inlet device for a normalizing pickling unit, comprising: The feeding buffer unit 1 includes a first saddle unit 11 and a second saddle unit 12 arranged at intervals along the first mounting line A. Both the first saddle unit 11 and the second saddle unit 12 include two saddles symmetrically arranged on both sides of the first mounting line A. Unwinding preparation unit 2 is located on the side of the second saddle unit 12 away from the first saddle unit 11. Unwinding preparation unit 2 includes a ground roller mechanism 21, a first guide plate 22, a first straightener 23 and a head cutter 24 arranged sequentially along the second mounting line B perpendicular to the first mounting line A. The ground roller mechanism 21 includes two roller shafts 211 symmetrically arranged on both sides of the first mounting line A. Transport unit 3 includes a steel coil car 31, which runs along the first installation line A; The unwinding unit 4 includes an uncoiler 41, a second guide plate 42, and a second straightener 43 arranged sequentially along a third mounting line C perpendicular to the first mounting line A. The central axis of the uncoiler 41 is collinear with the first mounting line A.

[0026] This utility model discloses an inlet device for a normalizing pickling unit. By setting up a feeding buffer unit 1 comprising a first saddle unit 11 and a second saddle unit 12, and cooperating with a coil car 31 running along the first installation line A, it achieves buffering and orderly conveying of the coils, providing a stable material supply foundation for the uncoiling preparation unit 2 and the uncoiling unit 4, effectively avoiding efficiency bottlenecks caused by single-point feeding. Furthermore, arranging the uncoiling preparation unit 2 and the uncoiling unit 4 along an installation line perpendicular to the first installation line A results in a compact structure, clear functional zoning, and smooth material flow. This layout optimizes equipment configuration, avoids the redundancy and complexity of a dual-uncoiling system, and significantly reduces equipment investment, floor space, and maintenance costs while ensuring processing capacity. Simultaneously, by setting up a position detection unit 5 and a centering detection unit 6, it achieves automatic detection and monitoring of the coil position and attitude, providing accurate data support for subsequent automated processing (such as centering, straightening, and shearing), helping to improve the accuracy of removing out-of-tolerance portions and the automation level and operational reliability of the entire inlet section.

[0027] Specifically, the loading and buffering unit 1 consists of a first saddle unit 11 and a second saddle unit 12 spaced apart along the first mounting line A. Each of the first saddle unit 11 and the second saddle unit 12 includes two saddles symmetrically arranged on both sides of the first mounting line A. The main function of these saddles is to support the hot-rolled silicon steel coils, providing a stable placement platform for the coils and ensuring that they maintain the correct position and orientation during subsequent loading operations, facilitating transportation and loading by the coil trolley 31. Simultaneously, the symmetrical layout of the double saddles effectively improves the stability of the coil placement and reduces the risk of swaying and displacement during the buffering process.

[0028] The uncoiling preparation unit 2 is located on the side of the second saddle unit 12 away from the first saddle unit 11. Along the second mounting line B, perpendicular to the first mounting line A, the ground roller mechanism 21, the first guide plate 22, the first straightener 23, and the head cutter 24 are arranged sequentially. The ground roller mechanism 21 includes two rollers 211 symmetrically arranged on both sides of the first mounting line A. Its main function is to assist in unwinding the strip head and smoothly deliver the strip head to subsequent equipment. In actual operation, the ground roller mechanism 21 provides forward propulsion for the strip through the rotation of the rollers 211, enabling the strip to unwind smoothly from the coil. The first guide plate 22 guides the strip into the first straightener 23. It can adjust and guide the strip's position according to its actual position and operating state, ensuring the strip enters the first straightener 23 accurately. The first straightener 23 performs preliminary straightening of the strip, eliminating bending and deformation caused during transportation and storage, allowing the strip to enter the head cutter 24 in a flat state. The head cutter 24 is responsible for cutting off the portion of the strip steel head that is out of size tolerance. Through precise cutting operations, it removes the unqualified strip steel sections, providing qualified strip steel raw materials for the subsequent normalizing and pickling processes.

[0029] The coil trolley 31 runs along the first installation line A. Its function is to transport steel coils between the first saddle unit 11 and the second saddle unit 12, and between the uncoiling preparation unit 2 and the uncoiling unit 4. Through its lifting and traveling mechanisms, the coil trolley 31 can accurately grab and place steel coils, achieving efficient transfer of steel coils between different equipment. During transportation, the coil trolley 31 can respond quickly according to production needs, transporting steel coils to designated locations in a timely manner, ensuring the continuous operation of the production line.

[0030] The uncoiling unit 4 is sequentially equipped with an uncoiler 41, a second guide plate 42, and a second straightener 43 along a third installation line C perpendicular to the first installation line A, with the central axis of the uncoiler 41 collinear with the first installation line A. The uncoiler 41 unwinds the steel coil, providing a continuous strip for subsequent processing steps. During the uncoiling process, the uncoiler 41 uses precise tension control to ensure the strip maintains stable tension during unwinding, preventing problems such as loosening or breakage. The second guide plate 42 guides the uncoiled strip into the second straightener 43. Similar to the first guide plate 22, it adjusts and guides the strip's position, ensuring smooth entry into the second straightener 43. The second straightener 43 re-straightens the strip, further improving its flatness to meet the stringent flatness requirements of subsequent processes.

[0031] Furthermore, it also includes an on-site detection unit 5, which comprises multiple on-site detection sensors. On-site detection sensors are respectively installed on both sides of the first saddle unit 11, the second saddle unit 12, and the ground roller mechanism 21. Specifically, the on-site detection sensors can detect in real time whether the steel coil is in place and its positional status. Through real-time monitoring of the steel coil's position and attitude, the on-site detection unit 5 can provide accurate positional information for the transportation operation of the steel coil cart 31, ensuring that the steel coil cart 31 can accurately grasp and place the steel coil, thereby improving transportation efficiency and accuracy.

[0032] Furthermore, it also includes a centering detection unit 6, which is located between the uncoiling preparation unit 2 and the uncoiling unit 4. The centering detection unit 6 includes a height detection sensor and a width detection sensor. Two height detection sensors are symmetrically arranged to detect the two edge positions in the height direction of the steel coil, and two width detection sensors are symmetrically arranged to detect the two edge positions in the width direction of the steel coil. Specifically, the centering detection unit 6 can detect the positional deviation of the steel coil in the height and width directions in real time and feed the detection data back to the control system. The control system adjusts the position of the steel coil based on the feedback data to ensure that the steel coil is in a precise centering position when entering the uncoiling unit 4, providing good conditions for subsequent uncoiling and processing steps. Specifically, the running trajectory of the steel coil carriage 31 and the position of the drum of the uncoiling machine 41 can be adjusted to make the steel coil coaxial with the drum of the uncoiling machine 41, ensuring smooth winding.

[0033] Furthermore, the in-situ detection sensor, height detection sensor, and width detection sensor can be infrared sensors, laser sensors, or vision sensors.

[0034] Furthermore, the ground roller mechanism 21 includes two mounting seats symmetrically arranged on both sides of the first mounting line. Two roller shafts 211 are rotatably connected to the two mounting seats, and each roller shaft 211 is connected to a drive source for driving its rotation. Specifically, the drive source can be a motor, which is connected to the roller shaft 211 through a transmission device such as a belt, chain, or coupling, providing rotational power to the roller shaft 211. In actual operation, the drive source controls the speed and direction of the roller shaft 211 according to the production process requirements, thereby achieving stable conveying and unfolding of the strip steel.

[0035] Furthermore, the first guide plate 22 includes a first guide plate body and a first hydraulic adjusting rod. One end of the first guide plate body is rotatably connected to a nearby mounting base, and the tailstock of the first hydraulic adjusting rod is rotatably connected to this mounting base, with its output end rotatably connected to the bottom of the first guide plate body. When it is necessary to adjust the angle of the first guide plate 22, the first hydraulic adjusting rod, through its telescopic movement, pushes the first guide plate body to rotate around its rotational connection point with the mounting base, thereby achieving precise adjustment of the angle of the first guide plate 22. This design allows for flexible adjustment of the guide plate angle according to the actual running conditions of the strip, ensuring that the strip can smoothly transition from the ground roller mechanism 21 to the first straightener 23.

[0036] Furthermore, the second guide plate 42 includes a second guide plate body and a second hydraulic adjusting rod. One end of the second guide plate body is rotatably connected to the second straightener 43. The tailstock of the second hydraulic rod is rotatably mounted on one side of the second straightener 43, and its output end is rotatably connected to the bottom of the second guide plate body. Similar to the first guide plate 22, the second hydraulic adjusting rod drives the second guide plate body to rotate around its rotation connection point through telescopic movement, thereby adjusting the angle of the second guide plate 42. By precisely adjusting the angle of the second guide plate 42, it is possible to ensure that the uncoiled strip accurately enters the second straightener 43, improving the straightening effect of the strip.

[0037] Furthermore, the uncoiling preparation unit 2 also includes a waste collection device 25, which is located along the second installation line B on the side of the cutting shear 24 away from the first straightening machine 23. Specifically, the waste collection device 25 typically takes the form of a waste bin or a waste conveyor belt to collect the waste cut by the cutting shear 24 in a timely manner for subsequent centralized processing. Taking the waste conveyor belt as an example, it can continuously transport the waste from the cutting shear 24 to the designated waste collection area, preventing waste from accumulating on the production site and affecting production order and equipment operation.

[0038] Furthermore, the uncoiling unit 4 also includes a flame heating device 44 disposed along the third mounting line C, and the flame heating device 44 is located on the side of the uncoiler 41 away from the second guide plate 42. Specifically, the flame heating device 44 is used to locally heat the steel coil before uncoiling, especially for steel coils with high hardness or difficult processing. Heating the steel coil with the flame heating device 44 can reduce the hardness of the steel coil, improve its processing performance, and facilitate subsequent uncoiling and processing steps. In practical applications, the flame heating device 44 precisely controls the heating temperature and heating time according to parameters such as the material and thickness of the steel coil to ensure that the steel coil reaches the optimal processing state after heating.

[0039] Work process: Steel coil storage and transportation: The overhead crane lifts the hot-rolled steel coil to the first saddle unit 11. The on-site detection sensors on both sides of the first saddle unit 11 detect the on-site status of the steel coil. After confirming that the steel coil is placed in place, the unit control system issues a command, and the steel coil car 31 starts to transport the steel coil from the first saddle unit 11 to the second saddle unit 12 for temporary storage. The on-site detection sensors on both sides of the second saddle unit 11 simultaneously detect the on-site status of the steel coil.

[0040] Steel coil shearing preparation: When the unit needs to process the steel coil, the steel coil trolley 31 transports the steel coil from the second saddle unit 12 to the ground roller mechanism 21. After the on-site detection sensor corresponding to the ground roller mechanism 21 detects that the steel coil is in place, the staff removes the bundling strap of the steel coil. Subsequently, the roller shaft 211 starts to rotate, driving the steel coil to rotate. Under the guidance of the first guide plate 22, the steel coil head is led out from below the steel coil (bottom uncoiling method) and enters the first straightener 23.

[0041] Head shearing process: The first straightener 23 clamps and straightens the steel coil head to eliminate bending deformation; the straightened head continues to be conveyed forward and enters the head cutter 24, which cuts off the excess part of the head according to the preset size; the waste generated by shearing falls into the waste collection device 25 for centralized collection.

[0042] Coil size measurement and winding: After the strip shearing is completed, the roller shaft 211 of the ground roller mechanism 21 rotates in the opposite direction to retract the strip head of the steel coil onto the coil; the coil carriage 31 starts again, driving the steel coil to move towards the uncoiling unit 4. During the movement, the height detection sensor and the width detection sensor detect the two edge positions of the steel coil in the height direction and the width direction, respectively, and transmit the data to the control system; the control system adjusts the running trajectory of the coil carriage 31 and the position of the uncoiling machine 41 according to the measurement data, so that the steel coil is coaxial with the drum of the uncoiling machine 41, and accurately delivers the steel coil to the uncoiling machine 41 to complete the automatic winding.

[0043] Uncoiling operation: The uncoiler 41 clamps the steel coil, and the flame heating device 44 locally heats and softens the strip head of the steel coil; then, the uncoiler 41 starts to rotate, driving the steel coil to rotate, and the strip head of the steel coil is led out from above the steel coil (top uncoiling method). Under the guidance of the second guide plate 42, it enters the second straightener 43. The second straightener 43 clamps and straightens the strip steel to eliminate the wavy deformation of the strip steel. The straightened steel strip smoothly enters the subsequent normalizing and pickling process, completing the entire steel coil inlet processing flow.

[0044] Example 2: This utility model also discloses a steel strip production line, including the inlet equipment of the normalizing pickling unit as in Example 1.

[0045] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An inlet device for a normalizing pickling unit, characterized in that: include, The feeding buffer unit includes a first saddle unit and a second saddle unit that are spaced apart along a first mounting line. Each of the first saddle unit and the second saddle unit includes two saddles symmetrically arranged on both sides of the first mounting line. An unwinding preparation unit is provided on the side of the second saddle unit away from the first saddle unit. The unwinding preparation unit includes a ground roller mechanism, a first guide plate, a first straightener and a head cutter arranged sequentially along a second mounting line perpendicular to the first mounting line. The ground roller mechanism includes two rollers symmetrically arranged on both sides of the first mounting line. A transport unit, the transport unit comprising a steel coil car, the steel coil car running along the first installation line; The unwinding unit includes an uncoiler, a second guide plate, and a second straightener arranged sequentially along a third mounting line perpendicular to the first mounting line. The central axis of the uncoiler is collinear with the first mounting line.

2. The inlet equipment of the normalizing pickling unit according to claim 1, characterized in that: It also includes an in-situ detection unit, which includes multiple in-situ detection sensors. The in-situ detection sensors are respectively provided on both sides of the first saddle unit, the second saddle unit, and the ground roller mechanism.

3. The inlet equipment of the normalizing pickling unit according to claim 2, characterized in that: It also includes a centering detection unit, which is disposed between the uncoiling preparation unit and the uncoiling unit. The centering detection unit includes a height detection sensor and a width detection sensor. Two height detection sensors are symmetrically arranged to detect the two edge positions in the height direction of the steel coil, and two width detection sensors are symmetrically arranged to detect the two edge positions in the width direction of the steel coil.

4. The inlet equipment of the normalizing pickling unit according to claim 3, characterized in that: The in-situ detection sensor, height detection sensor, and width detection sensor can be infrared sensors, laser sensors, or vision sensors.

5. The inlet equipment of the normalizing pickling unit according to claim 1, characterized in that: The roller mechanism includes two mounting seats symmetrically arranged on both sides of the first mounting line. The two roller shafts are rotatably connected to the two mounting seats, and each roller shaft is connected to a drive source for driving its rotation.

6. The inlet equipment of the normalizing pickling unit according to claim 5, characterized in that: The first guide plate includes a first guide plate body and a first hydraulic adjusting rod. One end of the first guide plate body is rotatably connected to a mounting base nearby. The tail of the first hydraulic adjusting rod is rotatably connected to this mounting base, and its output end is rotatably connected to the bottom of the first guide plate body.

7. The inlet equipment of the normalizing pickling unit according to claim 6, characterized in that: The second guide plate includes a second guide plate body and a second hydraulic adjusting rod. One end of the second guide plate body is rotatably connected to the second straightening machine. The tailstock of the second hydraulic adjusting rod is rotatably disposed on one side of the second straightening machine, and its output end is rotatably connected to the bottom of the second guide plate body.

8. The inlet equipment of the normalizing pickling unit according to claim 1, characterized in that: The unwinding preparation unit also includes a waste collection device, which is located along the second mounting line on the side of the head cutter away from the first straightening machine.

9. The inlet equipment of the normalizing pickling unit according to claim 1, characterized in that: The uncoiling unit also includes a flame heating device arranged along the third mounting line, and the flame heating device is located on the side of the uncoiling machine away from the second guide plate.

10. A steel strip production line, characterized in that: Includes the inlet equipment of the normalizing pickling unit as described in any one of claims 1-9.

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