Steckel mill HGC redundant position detection device and control method

Abstract

The invention provides a steckel mill HGC redundant position detection device and a control method, the device is provided with a long displacement sensor, the displacement sensor adopts a stainless steel special protection installation device, the displacement sensor is installed in a protective cover, the interior of the protective cover is filled with glue and fixed by screws, and the special protective cover is firmly connected with an HGC bottom plate through threads. The magnetic ring of the displacement sensor can be fixed by a free movable support, the whole device is fixed firmly without shaking, the displacement sensor is connected with a control device through a special cable, and reliability and safety of HGC position control are improved. A control program carries out real-time tracking analysis on numerical value detection of a steckel mill HGC redundancy control device and a steckel mill HGC original control device, automatic switching is achieved when abnormal numerical values occur, and compared with an existing steckel mill HGC position control device which is single in control mode and high in fault rate, problems cannot be handled in time, and faults are prone to expansion, the control method has the advantages that the control mode is simple, and the fault rate is high. And practical replacement and improvement are carried out.

Description

Technical Field

[0001] This application relates to the technical field of HGC position control technology for Steckel mills in the industry, and particularly relates to a redundant position detection device and control method for the HGC of a Steckel mill. Background Art

[0002] In the production of modern iron and steel industry, the Steckel mill, as a key rolling equipment, undertakes the important task of rolling steel into the required shape and specifications. The quality of its performance directly affects the quality of steel and production efficiency. Among the many control systems of the Steckel mill, the HGC (Hydraulic Gap Control) position control system is particularly important. The HGC system ensures that the steel can obtain uniform thickness and ideal surface quality during the rolling process by precisely controlling the gap between the rolls. The accuracy and reliability of this system are directly related to the overall performance of the Steckel mill and the market competitiveness of the products.

[0003] Currently, most HGC position control systems of Steckel mills use four SONY magnetic scales installed diagonally for position detection. They determine the position of the rolls by measuring the change of the magnetic field, so as to achieve precise control of the roll gap. Although SONY magnetic scales have high precision and stability in theory, in the actual industrial production environment, there are still situations where the detection is inaccurate.

[0004] Firstly, the working environment of the Steckel mill is usually very harsh, full of corrosive substances such as scale and mill cooling water. These substances are extremely easy to erode the magnetic scale, resulting in problems such as jamming and inaccurate measurement. Secondly, the magnetic rod part of the magnetic scale is easily broken due to the long-term mechanical stress during the rolling process. This not only causes equipment damage but may also lead to more serious production accidents. In addition, due to the lack of redundant replacement and intelligent diagnosis functions in the existing system, once a magnetic scale fails, it often needs to stop for maintenance, which not only increases production costs but also seriously affects the continuous and stable operation of the production line. Summary of the Invention

[0005] To solve the problems that the existing SONY magnetic scale is eroded resulting in inaccurate measurement, and the system lacks redundant replacement and intelligent diagnosis functions, and any one SONY magnetic scale fails and cannot continue to detect, this application provides a redundant position detection device for the HGC of a Steckel mill on the one hand, including:

[0006] A redundant control unit, an original control unit, and a control device;

[0007] The redundant control unit includes: a displacement sensor, a special protective cover for the sensor, a magnetic ring fixing frame, a magnetic ring, and a special cable for the sensor;

[0008] The displacement sensor is vertically embedded in the inner cavity of the protective cover and fixed by screws, and the protective cover is fixed on the HGC bottom plate by threaded connection;

[0009] The magnetic ring fixing bracket is fixed on the HGC cylinder body by bolts, the magnetic ring is rotatably fixed at the center position of the magnetic ring fixing bracket, and the magnetic ring is parallel and aligned with the sensing end face of the displacement sensor to form a non-contact measurement structure;

[0010] The displacement sensor is electrically connected to the control device through the special sensor cable;

[0011] The displacement sensor is configured to: detect the displacement information of the redundant control unit on the HGC cylinder body, obtain the first displacement signal of the HGC cylinder body, and send the first displacement signal to the control device;

[0012] The redundant control unit and the original control unit are diagonally distributed on the HGC cylinder body, and the original control unit is also electrically connected to the control device;

[0013] The original control unit is configured to: detect the displacement information of the original control unit on the HGC cylinder body, obtain the second displacement signal, and send the second displacement signal to the control device;

[0014] The control device integrates a programmable logic controller, and the control device is configured to:

[0015] Collect the first displacement signal and the second displacement signal in real time through the programmable logic controller, and compare and analyze the first displacement signal and the second displacement signal to obtain a signal deviation;

[0016] When there is a signal deviation in any one of the first displacement signal and the second displacement signal, automatically switch to the other item to output and control the position of the HGC cylinder body.

[0017] In a feasible implementation manner, the original control unit includes: a SONY magnetic scale fixing block and a SONY magnetic scale;

[0018] The magnetic ring fixing bracket is fixed on the SONY magnetic scale fixing block by two mutually perpendicular screws, and the SONY magnetic scale fixing block is fixed on the HGC cylinder body;

[0019] The SONY magnetic scale is fixed on the HGC cylinder body through a bracket and is parallel to the detection direction of the displacement sensor. The SONY magnetic scale is used to detect the displacement information of the original control unit on the HGC cylinder body.

[0020] In a feasible implementation, the original control unit further includes: a signal conversion module and a connection cable;

[0021] The signal conversion module is integrated in the SONY magnetic scale fixing block and is electrically connected to the control device through the connection cable;

[0022] The signal conversion module is used to convert the analog signal obtained when the SONY magnetic scale detects the displacement of the HGC cylinder body into a digital signal to obtain the second displacement signal, and send the second displacement signal to the control device.

[0023] In a feasible implementation, the special sensor protective cover is made of stainless steel, and the inner cavity of the special sensor protective cover is filled with high-temperature sealant.

[0024] In a feasible implementation, the adjustment range of the magnetic ring fixing bracket is 360° free rotation, the length of the displacement sensor is 150 mm, and the installation direction is parallel to the movement axis of the HGC cylinder body.

[0025] In a feasible implementation, the programmable logic controller is configured to synchronously collect the first displacement signal and the second displacement signal with a millisecond-level period.

[0026] In a feasible implementation, the programmable logic controller includes: a numerical comparison module and a switching control module;

[0027] The numerical comparison module is configured to compare the first displacement signal and the second displacement signal;

[0028] The switching control module is configured to automatically switch when the comparison deviation between the first displacement signal and the second displacement signal meets the trigger condition.

[0029] In a feasible implementation, the trigger condition of the switching control module is that the duration of the signal deviation value exceeding the preset threshold ≥ 50 ms;

[0030] The numerical comparison module is further configured to perform weighted average calculation on the first displacement signal and the second displacement signal.

[0031] In a feasible implementation, the special sensor cable adopts a double-layer shielding structure, and a shielding sheath is provided at the cable interface of the special sensor cable with the displacement sensor and the control device.

[0032] On the other hand, the present application provides a method for redundant position control of the HGC of a Steckel mill, which is applied to any one of the above-mentioned redundant position detection devices of the HGC of a Steckel mill, and includes the steps:

[0033] Collecting in real time the first displacement signal of the redundant control device and the second displacement signal of the original control device;

[0034] Comparing and analyzing the values ​​of the first displacement signal and the second displacement signal by using a weighted average calculation method to obtain a signal deviation;

[0035] When the signal deviation of any one of the first displacement signal and the second displacement signal exceeds a preset threshold and lasts for greater than or equal to 0 ms, the other item is automatically switched to output to control the position of the HGC cylinder body.

[0036] The present application provides a redundant position detection device and control method for a furnace coil mill HGC. The control program performs real-time tracking and analysis on the numerical detection of the redundant control device of the furnace coil mill HGC and the original control device of the furnace coil mill HGC, and realizes automatic switching when abnormal numerical values ​​appear. Compared with the existing furnace coil mill HGC position control device, which has a single control mode, a high failure rate, and a problem that cannot be handled in time and is easy to expand, the device has been replaced and improved in practicality. The device uses a displacement sensor with a length of 150mm. The displacement sensor uses a stainless steel special protective installation device. The displacement sensor is installed in a protective cover. The protective cover is filled with glue and fixed with screws. The special protective cover is firmly connected to the HGC bottom plate with threads. The displacement sensor magnetic ring is fixed with a 360° freely movable bracket. The overall equipment is firmly fixed without shaking. The displacement sensor is connected to the control device with a special cable, which improves the reliability and safety of the HGC position control. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the implementation of the present invention, and together with the specification are used to explain the principles of the embodiments of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the implementation of the present invention, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0038] Figure 1 Schematic diagram of the composition of a redundant position detection device for a Steckel mill HGC shown in an embodiment of the present application;

[0039] Figure 2 is a schematic structural diagram of a redundant position detection device for a Steckel mill HGC exemplarily shown in an embodiment of the present application;

[0040] Figure 3 It is a flow chart of a method for controlling the redundant position of a Steckel mill HGC exemplarily shown in an embodiment of the present application.

[0041] Description of Figure Numbers:

[0042] 1 - Displacement sensor; 2 - Special protective cover for sensor; 3 - Magnet ring fixing bracket; 4 - Magnet ring; 5 - SONY magnetic scale fixing block. Detailed implementation manners

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present invention.

[0044] Currently, in the industrial production process, the HGC position control of the Steckel mill is controlled by four SONY magnetic scales installed diagonally, without a redundant replacement and intelligent diagnosis system. Due to the harsh on-site environment, a single position control device is extremely vulnerable to scale, mill cooling water, etc., which can easily cause jams, magnetic rod fractures, etc., and can easily damage the equipment, and its service life is limited, seriously restricting the stable operation of the Steckel mill production.

[0045] To solve the above problems, on the one hand, the present application provides a redundant position detection device for the HGC of the Steckel mill. Referring to Figure 1 and Figure 2 as shown, it includes: a redundant control unit, an original control unit, and a control device. The redundant control unit includes: a displacement sensor 1, a special protective cover for the sensor 2, a magnet ring fixing bracket 3, a magnet ring 4, and a special cable for the sensor.

[0046] The displacement sensor 1 is vertically embedded in the inner cavity of the protective cover 2 and the displacement sensor 1 is fixed by screws. The protective cover 2 is fixed to the HGC bottom plate by threaded connection.

[0047] Specifically, a high-precision, non-contact displacement sensor 1 can be used, such as a laser displacement sensor or a magnetostrictive displacement sensor, which is vertically embedded in the inner cavity of the special protective cover 2 for the sensor and fixed by screws. This installation method not only ensures the stability of the displacement sensor 1 but also avoids the direct erosion of the harsh on-site environment on the displacement sensor 1.

[0048] The magnetic ring fixing bracket 3 is fixed to the HGC cylinder body by bolts. The magnetic ring 4 is rotatably fixed at the central position of the magnetic ring fixing bracket 3. The magnetic ring 4 is parallel and aligned with the sensing end face of the displacement sensor 1, forming a non-contact measurement structure. The non-contact measurement structure not only improves the measurement accuracy but also avoids wear and faults caused by direct contact. The magnetic ring 4 is the measurement target of the displacement sensor 1. The surface of the magnetic ring 4 can be specially treated to have excellent magnetic properties and wear resistance, which can further ensure the stability and accuracy of the measurement.

[0049] The displacement sensor 1 is electrically connected to the control device through a special sensor cable. In some embodiments, the special sensor cable adopts a double-layer shielding structure, and shielding sleeves are provided at the cable interfaces of the special sensor cable with the displacement sensor 1 and the control device.

[0050] The special sensor cable adopting a double-layer shielding structure can effectively prevent electromagnetic interference and signal attenuation, ensuring stable communication between the displacement sensor and the control device. The displacement sensor 1 is configured to: detect the displacement information of the redundant control unit on the HGC cylinder body, obtain the first displacement signal of the HGC cylinder body, and send the first displacement signal to the control device.

[0051] In summary, in this embodiment, the connection relationship of the redundant control unit is as follows: The displacement sensor 1 is vertically embedded in the inner cavity of the special sensor protective cover 2 and fixed by screws. The protective cover 2 is fixed to the HGC bottom plate by threaded connection, ensuring the stable installation of the displacement sensor 1. The magnetic ring fixing bracket 3 is fixed to the HGC cylinder body by bolts. The magnetic ring 4 is rotatably fixed at the central position of the magnetic ring fixing bracket 3 and is parallel and aligned with the sensing end face of the displacement sensor 1. The displacement sensor 1 is connected to the input interface of the programmable logic controller of the control device through a special sensor cable, realizing real-time signal transmission.

[0052] The redundant control unit and the original control unit are diagonally distributed on the HGC cylinder body. The original control unit is also electrically connected to the control device. The original control unit is configured to: detect the displacement information of the original control unit on the HGC cylinder body, obtain the second displacement signal, and send the second displacement signal to the control device.

[0053] The original control unit and the redundant control unit are diagonally distributed on the HGC cylinder body, which enables the other control unit to still work normally even if one control unit fails or is interfered (such as affected by scale, rolling mill cooling water, etc.), thus ensuring the stability and continuity of the HGC system.

[0054] The control device is configured to: collect the first displacement signal and the second displacement signal in real time through a programmable logic controller, compare and analyze the first displacement signal and the second displacement signal to obtain a signal deviation; when there is a signal deviation in any one of the first displacement signal and the second displacement signal, automatically switch to the other one for output control of the position of the HGC cylinder body.

[0055] A programmable logic controller is integrated in the control device as the core processor of the control device. The programmable logic controller has powerful data processing and logic control capabilities. The programmable logic controller realizes precise control of the position of the HGC cylinder body by collecting the position signals of the redundant control unit and the original control unit in real time and performing comparison and analysis.

[0056] The working principle of the HGC redundant position detection device for the Steckel mill proposed in this embodiment is: in the normal working state, the redundant control unit and the original control unit work simultaneously, respectively detect the position information of the HGC cylinder body, and send the signals to the control device. The programmable logic controller in the control device collects these two signals in real time and performs comparison and analysis. When a deviation is detected in a certain signal, the programmable logic controller will automatically switch to the other signal for output control to ensure the accurate and stable position of the HGC cylinder body.

[0057] By introducing a redundant control unit, this embodiment realizes double detection and control of the position of the HGC cylinder body. When the original control unit fails or the signal deviation is too large, the redundant control unit can seamlessly switch and continue to work, ensuring the continuous and stable operation of the HGC system and improving the reliability and redundancy of the system.

[0058] In a feasible implementation manner, the original control unit includes: a SONY magnetic scale fixing block 5 and a SONY magnetic scale.

[0059] The magnetic ring fixing frame 3 is fixed on the SONY magnetic scale fixing block 5 by two mutually perpendicular screws, and the SONY magnetic scale fixing block 5 is fixed on the HGC cylinder body. The SONY magnetic scale is fixed on the HGC cylinder body through a bracket and is parallel to the detection direction of the displacement sensor 1. The SONY magnetic scale is used to detect the displacement information of the original control unit on the HGC cylinder body.

[0060] The SONY magnetic scale, as the displacement sensor of the original control unit, has the characteristics of high measurement accuracy and good stability. It is fixed on the HGC cylinder body through a bracket and is parallel to the detection direction of the displacement sensor 1, realizing the redundant configuration of the system.

[0061] In a feasible implementation manner, the original control unit further includes: a signal conversion module and a connection cable.

[0062] The signal conversion module is electrically connected to the control device through a connecting cable; the signal conversion module is integrated within the SONY magnetic scale fixing block 5, responsible for converting the analog signal detected by the SONY magnetic scale into a digital signal, and sending it to the input interface of the programmable logic controller of the control device through the connecting cable.

[0063] The displacement information detected by the SONY magnetic scale is an analog signal, and the signal conversion module within the original control unit is responsible for converting this analog signal into a digital signal for subsequent processing and analysis. At the same time, the converted signal is transmitted to the control device through the connecting cable.

[0064] Combined with the above embodiments, the specific connection relationship of the original control unit is as follows: The SONY magnetic scale fixing block 5 is fixed to the HGC cylinder body by bolts, and the magnetic ring fixing bracket 3 is fixed to the SONY magnetic scale fixing block 5 by two mutually perpendicular screws. The SONY magnetic scale is fixed to the HGC cylinder body through a bracket and is parallel to the detection direction of the displacement sensor 1. The signal conversion module is integrated within the SONY magnetic scale fixing block 5, converting the analog signal detected by the SONY magnetic scale into a digital signal, and sending it to the input interface of the programmable logic controller of the control device through the connecting cable.

[0065] In the embodiments of the present application, by comparing the displacement signals detected by the redundant control unit and the original control unit, the control device can timely detect and diagnose any potential faults or errors. This real-time comparative analysis helps to quickly locate problems and reduce the production interruption time.

[0066] In some embodiments of the present application, the sensor special protective cover 2 is made of stainless steel, and the inner cavity of the sensor special protective cover 2 is filled with high-temperature sealant. The sensor special protective cover 2: Made of stainless steel, it has excellent corrosion resistance and mechanical strength. The inner cavity of the protective cover is filled with high-temperature sealant, further enhancing the protection effect and effectively preventing corrosive substances such as scale and cooling water from eroding the sensor.

[0067] By adopting protective measures such as the sensor special protective cover 2 made of stainless steel and filling with high-temperature sealant, this embodiment effectively prevents the harsh on-site environment from eroding and damaging the sensor. This design extends the service life of the displacement sensor 1 and improves the stability and reliability of the system.

[0068] In some embodiments of the present application, the adjustment range of the magnetic ring fixing bracket 3 is 360° free rotation, the length of the displacement sensor 1 is 150 mm, and the installation direction is parallel to the movement axis of the HGC cylinder body. The method of fixing the magnetic ring fixing bracket 3 to the HGC cylinder body with bolts ensures the stability and accuracy of the magnetic ring 4. At the same time, the magnetic ring fixing bracket 3 also has an adjustment range of 360° free rotation and can be adjusted and optimized according to actual needs.

[0069] In some embodiments of the present application, the programmable logic controller is configured to synchronously collect the first displacement signal and the second displacement signal with a millisecond-level cycle.

[0070] Specifically, as the core control unit of the system, the programmable logic controller is responsible for real-time collection of the displacement signals of the redundant control unit and the original control unit, and conducts comparative analysis. Its millisecond-level cycle synchronous collection function ensures the real-time and accuracy of the signals. At the same time, the programmable logic controller also has the functions of fault alarm and recording, providing strong support for equipment maintenance and fault troubleshooting.

[0071] In some embodiments of the present application, the programmable logic controller includes: a numerical comparison module and a switching control module; the numerical comparison module, as a part of the programmable logic controller, is responsible for comparing the position signals of the redundant control unit and the original control unit, and calculating the signal deviation. When the deviation exceeds the preset threshold, it triggers the switching control module to perform a switching operation.

[0072] The switching control module is configured to: automatically switch when the comparison deviation between the first displacement signal and the second displacement signal meets the triggering condition. That is, the switching control module is responsible for performing switching operations between the redundant control unit and the original control unit. When it detects that a certain unit fails or the signal deviation is too large, the switching control module will automatically switch to another unit for output control to ensure the continuous and stable operation of the HGC system.

[0073] In some embodiments of the present application, the triggering condition of the switching control module is that the duration for which the signal deviation value exceeds the preset threshold ≥ 50 ms, and the numerical comparison module is further configured to: perform weighted average calculation on the first displacement signal and the second displacement signal.

[0074] Among them, weighted average calculation is a commonly used data processing method. By assigning different weights to different signals, it can more accurately reflect the actual state of the system. In the application scenario of this device, due to the influence of the harsh on-site environment and the characteristics of the equipment itself, the displacement signal may have a certain degree of fluctuation. Through weighted average calculation, different weights can be assigned to different signals, thereby smoothing these fluctuations, improving the accuracy and stability of displacement detection. And weighted average calculation can reduce the influence of abnormal or error of a single signal on the system control decision, and improve the robustness and anti-interference ability of the system.

[0075] The second aspect of the present application provides a method for controlling the redundant position of the HGC of a Steckel mill, which is applied to any one of the above-mentioned Steckel mill HGC redundant position detection devices, referring to Figure 3 As shown, it includes the steps:

[0076] S100: Collect the first displacement signal of the redundant control device and the second displacement signal of the original control device in real time.

[0077] Collecting displacement signals in real time is the basis for ensuring that the system can accurately judge the position of the HGC cylinder body. The redundant control device and the original control device respectively detect the displacement of the HGC cylinder body through their respective sensor structures and transmit the signals to the control device. The control device receives and processes the displacement signals from the redundant control device and the original control device in real time.

[0078] S200: Compare and analyze the values of the first displacement signal and the second displacement signal by using the weighted average calculation method to obtain the signal deviation.

[0079] Weighted average calculation can smooth the signal fluctuations caused by environmental factors or device characteristics and improve the accuracy of displacement detection. At the same time, by comparing and analyzing the values of the two displacement signals, potential faults or errors can be detected and diagnosed in a timely manner. Specifically, perform weighted average calculation on the first displacement signal and the second displacement signal to obtain two more stable displacement values. Then, calculate the deviation between these two displacement values as the signal deviation.

[0080] S300: When the signal deviation of any one of the first displacement signal and the second displacement signal exceeds the preset threshold and the duration is greater than or equal to 50 ms, automatically switch to the other one for output to control the position of the HGC cylinder body.

[0081] It can be understood that when the displacement signal of any control device has a large deviation and a long duration, it indicates that the device may have a fault or error. At this time, automatically switching to the other control device for output control can ensure the precise control of the position of the HGC cylinder body and avoid the occurrence of production accidents.

[0082] The control method provided in this embodiment realizes fast switching when any control device fails or has an error by collecting and comparing the displacement signals of the redundant control device and the original control device in real time, thereby ensuring the precise control of the position of the HGC cylinder body. This solution has beneficial effects such as improving production efficiency, enhancing product quality, extending the service life of equipment, and reducing maintenance costs, providing a strong guarantee for the stable operation of the production of steel rolling enterprises.

[0083] After considering the specification and the embodiments, those skilled in the art will easily think of other implementation schemes of the present disclosure. This application aims to cover any variations, uses, or adaptive changes of the present disclosure, and these variations, uses, or adaptive changes follow the general principles of the present disclosure and include the common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure.

Claims

1. A redundant position detection device for a Steckel mill HGC, characterized in that: include: Redundant control units, primary control units and control equipment; The redundant control unit comprises: a displacement sensor (1), a sensor-specific protective cover (2), a magnetic ring fixing frame (3), a magnetic ring (4) and a sensor-specific cable; The displacement sensor (1) is vertically embedded in the inner cavity of the protective cover (2) and fixed by screws, and the protective cover (2) is fixed to the HGC bottom plate by threaded connection; The magnetic ring fixing frame (3) is fixed to the HGC cylinder body by bolts, the magnetic ring (4) is rotatably fixed to the center position of the magnetic ring fixing frame (3), and the magnetic ring (4) is parallel and aligned with the sensing end face of the displacement sensor (1), forming a non-contact measurement structure; The displacement sensor (1) is electrically connected to the control device via the sensor-specific cable; The displacement sensor (1) is configured to: detect displacement information of the redundant control unit on the HGC cylinder body, obtain a first displacement signal of the HGC cylinder body, and send the first displacement signal to the control device; The redundant control unit and the original control unit are distributed diagonally on the HGC cylinder body, and the original control unit is also electrically connected to the control device; The original control unit is configured to: detect displacement information of the original control unit on the HGC cylinder body, obtain a second displacement signal, and send the second displacement signal to the control device; The control device has an integrated programmable logic controller, and the control device is configured as follows: The first displacement signal and the second displacement signal are collected in real time by a programmable logic controller, and the first displacement signal and the second displacement signal are compared and analyzed to obtain a signal deviation; When there is a signal deviation in either the first displacement signal or the second displacement signal, the other is automatically switched to output to control the position of the HGC cylinder body.

2. The redundant position detection device for the Steckel mill HGC according to claim 1, characterized in that: The original control unit comprises: a SONY magnetic scale fixing block (5) and a SONY magnetic scale; The magnetic ring fixing frame (3) is fixed to the SONY magnetic scale fixing block (5) by two mutually perpendicular screws, and the SONY magnetic scale fixing block (5) is fixed to the HGC cylinder body; The SONY magnetic ruler is fixed on the HGC cylinder body through a bracket and is parallel to the detection direction of the displacement sensor (1). The SONY magnetic ruler is used to detect the displacement information of the original control unit on the HGC cylinder body.

3. The redundant position detection device for the Steckel mill HGC according to claim 2, characterized in that: The original control unit also includes: a signal conversion module and a connecting cable; The signal conversion module is integrated into the SONY magnetic scale fixing block (5) and is electrically connected to the control device via the connecting cable; The signal conversion module is used to convert the analog signal obtained when the SONY magnetic ruler detects the displacement of the HGC cylinder body into a digital signal to obtain the second displacement signal, and send the second displacement signal to the control device.

4. The redundant position detection device for the Steckel mill HGC according to claim 1, characterized in that: The sensor-specific protective cover (2) is made of stainless steel, and the inner cavity of the sensor-specific protective cover (2) is filled with high-temperature sealant.

5. The redundant position detection device for the Steckel mill HGC according to claim 1, characterized in that: The adjustment range of the magnetic ring fixing frame (3) is 360° free rotation, the length of the displacement sensor (1) is 150 mm, and the installation direction is parallel to the movement axis of the HGC cylinder body.

6. The redundant position detection device for the Steckel mill HGC according to claim 1, characterized in that: The programmable logic controller is configured to synchronously collect the first displacement signal and the second displacement signal in a millisecond period.

7. The redundant position detection device for the Steckel mill HGC according to claim 6, characterized in that: The programmable logic controller comprises: a numerical comparison module and a switching control module; The numerical comparison module is configured to: compare the first displacement signal with the second displacement signal; The switching control module is configured to automatically switch when a comparison deviation between the first displacement signal and the second displacement signal meets a trigger condition.

8. The device for detecting redundant position of a Steckel mill HGC according to claim 7, characterized in that: The trigger condition of the switching control module is that the signal deviation value exceeds the preset threshold for a duration of ≥50ms; The numerical comparison module is further configured to perform weighted average calculation on the first displacement signal and the second displacement signal.

9. The device for detecting redundant position of a Steckel mill HGC according to claim 1, characterized in that: The sensor-specific cable (4) adopts a double-layer shielding structure, and a shielding sheath is provided at the cable interface between the sensor-specific cable (4), the displacement sensor (1) and the control device.

10. A method for controlling redundant positions of HGC of a Steckel mill, characterized in that: The method is applied to a Steckel mill HGC redundant position detection device according to any one of claims 1 to 9, comprising the steps of: Collecting in real time the first displacement signal of the redundant control device and the second displacement signal of the original control device; Comparing and analyzing the values ​​of the first displacement signal and the second displacement signal by using a weighted average calculation method to obtain a signal deviation; When the signal deviation of any one of the first displacement signal and the second displacement signal exceeds a preset threshold and lasts for more than or equal to 50 ms, the other item is automatically switched to output to control the position of the HGC cylinder body.

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