Intermediate plate blank heat preservation device

Abstract

The invention discloses an intermediate plate blank heat preservation device which comprises a heat preservation cover body used for covering an intermediate blank conveying path and a temperature adjusting system arranged on the heat preservation cover body, and the temperature adjusting system comprises a heating unit and a detection unit used for detecting temperature data of an intermediate blank. And the heating module is used for heating the intermediate billet when the temperature of the intermediate billet is lower than a preset lower limit value. The heat preservation device for the intermediate plate blank can effectively reduce heat loss of the intermediate blank in the transportation process, accurately control the temperature of the intermediate blank and improve the temperature uniformity of the intermediate blank, so that the quality of a hot-rolled product can be improved, and the production efficiency can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of rolling production equipment, and in particular relates to an intermediate plate insulation device. Background Art

[0002] In the steel rolling production process, the steel billet is rolled in the roughing mill to form an intermediate billet, which then needs to be transported to the finishing mill for further rolling. However, during the transportation of the intermediate billet from the roughing mill to the finishing mill, the temperature of the intermediate billet will drop significantly due to environmental heat dissipation and heat exchange with the air. This not only increases the temperature difference between the head and tail of the intermediate billet and the temperature difference between the surface and the center, but also makes it difficult for the overall billet temperature to meet the requirements of the finishing process.

[0003] The decrease in temperature and uneven distribution will cause a series of problems. On the one hand, it will cause the rolling force to fluctuate, affecting the stability and rolling accuracy of the rolling mill, and causing the product size deviation to exceed the allowable range. On the other hand, the uneven temperature distribution will cause the intermediate billet to deform unevenly during the rolling process, thus affecting the internal structure and mechanical properties of the product, reducing product quality and increasing the defective rate.

[0004] At present, although there are some insulation measures for the intermediate billet, the existing insulation devices generally have problems such as poor insulation effect, unreasonable structural design, and limited ability to adjust the temperature of the intermediate billet. For example, some insulation covers are made of a single material with limited thermal insulation performance; some insulation covers cannot be adjusted in real time according to the actual temperature of the intermediate billet; and some insulation covers are inconvenient in installation, maintenance and operation, which affects production efficiency.

[0005] It is hoped to provide an intermediate sheet insulation device, especially with regard to how to effectively reduce the heat loss of the intermediate billet during transportation, improve the accuracy of intermediate billet temperature control, improve the temperature uniformity of the intermediate billet, improve the quality of hot-rolled products, and improve production efficiency. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an intermediate sheet heat preservation device, the purpose of which is to effectively reduce the heat loss of the intermediate billet during transportation and improve the temperature control accuracy of the intermediate billet.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an intermediate sheet insulation device, including an insulation cover for covering the intermediate billet transportation path and a temperature control system arranged on the insulation cover, the temperature control system includes a heating unit and a detection unit for detecting the temperature data of the intermediate billet, and the heating module is configured to heat the intermediate billet when the temperature of the intermediate billet is lower than a preset lower limit value.

[0008] A plurality of heating units are provided, and the heating units are distributed at different positions on the heat-insulating cover body.

[0009] The heating unit is a temperature sensor, a plurality of temperature sensors are provided, and the temperature sensors are distributed at different positions on the heat preservation cover body.

[0010] The temperature regulation system also includes a data processing module and a central controller. The data processing module is connected to the detection unit. The data processing module transmits the preprocessed data to the central controller. The central controller analyzes the collected temperature data. The central controller determines whether the middle plate temperature meets the process requirements by establishing a temperature distribution model and determines the abnormal temperature area of ​​the middle plate.

[0011] The heating unit is an electric heating wire, which is made of a high-temperature-resistant and high-resistance alloy material.

[0012] The heat-insulating cover body comprises a base body, a heat-insulating layer and a heat-insulating layer arranged between the base body and the heat-insulating layer. The material of the heat-insulating layer is nano-aerogel heat-insulating felt.

[0013] The material of the thermal insulation layer is ceramic fiber thermal insulation cotton.

[0014] A cooling air duct is arranged in the heat-insulating cover body, and the cooling air duct is connected to a cooling fan.

[0015] Temperature sensors and flow regulating valves are arranged at the air inlet and the air outlet of the heat preservation cover body, and the temperature sensors transmit the collected temperature data to the central processor.

[0016] The heat-insulating cover is arranged on a tilting frame, the tilting frame is rotatably arranged, and the tilting frame is connected to a driving mechanism.

[0017] The intermediate sheet heat preservation device of the present invention can effectively reduce the heat loss of the intermediate billet during transportation, accurately control the temperature of the intermediate billet, and improve the temperature uniformity of the intermediate billet, thereby improving the quality of hot-rolled products and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] This specification includes the following drawings, which show the following contents:

[0019] Figure 1 It is a structural schematic diagram of the intermediate board heat preservation device of the present invention;

[0020] Figure 2 It is a front view of the intermediate board heat preservation device of the present invention;

[0021] Figure 3 It is a side view of the intermediate board heat preservation device of the present invention;

[0022] Figure 4 It is a schematic diagram of the principle block diagram of the temperature detection and regulation system;

[0023] The markings in the figure are: 1. tipping frame; 2. insulation cover; 3. suspension shaft; 4. buffer; 5. support; 6. side stop support; 7. gasket; 8. bolt; 9. fixing frame; 10. actuator. DETAILED DESCRIPTION

[0024] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0025] like Figures 1 to 3 As shown, the present invention provides an intermediate slab insulation device, comprising an insulation cover 2 for covering the intermediate billet transportation path and a temperature regulation system arranged on the insulation cover 2, the intermediate billet transportation path is from the outlet of the roughing mill to the entrance of the finishing mill, the temperature regulation system comprises a heating unit and a detection unit for detecting the temperature data of the intermediate billet, and the heating module is configured to heat the intermediate billet when the temperature of the intermediate billet is lower than a preset lower limit value.

[0026] Specifically, if Figures 1 to 3 As shown, the thermal insulation cover 2 is arranged on the tilting frame 1, and the tilting frame 1 is rotatable. The tilting frame 1 is connected to a driving mechanism, and the driving mechanism is used to control the rotation of the tilting frame 1. The tilting frame 1 drives the thermal insulation cover 2 to rotate synchronously. The rotation center line of the tilting frame 1 when rotating is parallel to the first direction, the first direction is a horizontal direction, and the first direction is parallel to the moving direction of the intermediate billet when it moves along the transport path.

[0027] like Figures 1 to 3 As shown, the insulation cover 2 is rectangular in shape, and its length is customized according to the transportation distance of the intermediate billet and the production line layout. Generally, it should cover most of the transportation path of the intermediate billet from the outlet of the roughing mill to the entrance of the finishing mill. The width and height should be slightly larger than the size of the intermediate billet to ensure that the intermediate billet can be completely covered by the cover.

[0028] In the embodiment of the present invention, the thermal insulation cover body 2 includes a base body, a thermal insulation layer, and a thermal insulation layer arranged between the base body and the thermal insulation layer. The thermal insulation cover body 2 is a three-layer composite structure.

[0029] In the embodiment of the present invention, the material of the thermal insulation layer is nano aerogel thermal insulation felt. Nano aerogel has an extremely low thermal conductivity (thermal conductivity ≤ 0.02W / (m·K)) and is one of the solid materials with the best thermal insulation performance known so far. Its unique nano porous structure can effectively inhibit the heat conduction and thermal radiation of gas molecules, and can block the heat of the intermediate blank from being transferred to the outside to the greatest extent. At the same time, nano aerogel thermal insulation felt is also light in weight and good in flexibility, making it easy to process and install.

[0030] In the embodiment of the present invention, the material of the thermal insulation layer is ceramic fiber thermal insulation cotton. The thermal insulation layer is located between the substrate and the heat insulation layer. The ceramic fiber thermal insulation cotton has good high temperature resistance and can withstand high temperature environment without melting or deformation. Its fibrous structure can form countless tiny air insulation layers, further preventing heat conduction and convection, and enhancing the thermal insulation effect. In addition, the ceramic fiber thermal insulation cotton also has a certain sound absorption and noise reduction function, which can reduce noise interference in the production process.

[0031] In the embodiment of the present invention, the material of the substrate is a high-strength, corrosion-resistant high-chromium-nickel austenitic stainless steel plate. The stainless steel plate can not only protect the internal heat insulation and thermal insulation materials from external mechanical damage, oxidation corrosion, and the invasion of dust and impurities, but also has good sealing performance to prevent heat from being lost through the gaps. The surface of the high-chromium-nickel austenitic stainless steel plate has been treated to have a certain reflective performance, which can reflect part of the radiated heat and further improve the thermal insulation effect.

[0032] Preferably, the thickness of the heat insulating layer is 10 mm-15 mm, the thickness of the thermal insulation layer is 15 mm-55 mm, and the thickness of the substrate is 2 mm-4 mm.

[0033] In the embodiment of the present invention, the driving mechanism mainly includes a fixed frame 9 and an actuator 10 arranged on the fixed frame 9. The actuator 10 is rotationally connected to the tilting frame 1. The actuator 10 is used to control the rotation of the tilting frame 1. The actuator 10 is a hydraulic cylinder to realize the rotatable opening of the tilting frame 1. The tilting frame 1 is rotationally connected to the fixed frame 9.

[0034] By starting the hydraulic pump of the hydraulic system, the hydraulic oil is pumped out of the oil tank and transported to the rodless chamber of the actuator 10 through the oil pipe. Under the pressure of the hydraulic oil, the piston of the actuator 10 begins to be subjected to an outward thrust. Since the piston and the piston rod are fixedly connected, the piston rod will extend outward together with the piston. As the piston rod extends, a force is generated at the connection point between the end of the piston rod and the tipping frame 1, and this force drives the tipping frame 1 to start rotating around its rotation axis. In this process, the hydraulic system will accurately control the extension speed and thrust of the piston rod according to the set pressure and flow, thereby achieving a smooth and slow opening of the tipping frame 1, and the tipping frame 1 drives the thermal insulation cover 2 to rotate synchronously.

[0035] During the transportation of the intermediate billet, when the actuator 10 is not in operation, the insulation cover 2 is tightly fixed on the supporting frame to ensure the sealing of the insulation cover. At this time, the insulation cover 2 covers the transportation path of the intermediate billet; when the intermediate billet needs to be inspected, maintained or the equipment needs to be replaced, the hydraulic pump can be remotely operated through the control system, and the actuator 10 drives the tilting frame 1 to rotate upward, and the tilting frame 1 drives the insulation cover 2 to rotate synchronously, opening the insulation cover 2 to expose the transportation path of the intermediate billet.

[0036] In order to ensure the stability and safety of the opening and closing process, a plurality of buffer rubber pads are also arranged between the heat preservation cover body 2 and the support frame to reduce the impact force and noise during the opening and closing process. At the same time, a limit switch is installed on the opening side of the heat preservation cover body 2 to prevent the heat preservation cover body 2 from being damaged due to excessive opening.

[0037] In the embodiment of the present invention, a plurality of heating units are provided, and the heating units are distributed at different positions on the heat-insulating cover body 2, so that multiple positions of the intermediate blank can be heated.

[0038] In the embodiment of the present invention, the heating unit is a temperature sensor, and a plurality of temperature sensors are provided. The temperature sensors are distributed at different positions on the heat preservation cover 2, so that the temperature of multiple parts of the intermediate billet can be detected and the temperature data of the intermediate billet can be collected.

[0039] In an embodiment of the present invention, the temperature control system also includes a data processing module and a central controller. The data processing module is connected to the detection unit and the central controller. The detection unit transmits the collected temperature data to the data processing module. The central controller is connected to the heating unit.

[0040] In the embodiment of the present invention, the heating unit is an infrared temperature sensor, and multiple high-precision infrared temperature sensors (accuracy ±1°C) are evenly arranged inside the thermal insulation cover 2, and 4 to 6 measuring points are arranged per square meter inside the thermal insulation cover 2, corresponding to the head, middle, tail, and positions close to the surface and center of the intermediate billet, respectively, to form a distributed infrared temperature measurement array to monitor the temperature gradient data of different parts of the intermediate billet in real time. The temperature sensor transmits the collected data to the data processing module, which performs pre-processing such as filtering and amplification on the data to remove noise interference and improve the accuracy of the data.

[0041] The data processing module transmits the pre-processed data to the central controller, which analyzes the collected temperature data according to the preset temperature range and temperature uniformity requirements. The central controller determines whether the middle plate temperature meets the process requirements and determines the abnormal temperature area of ​​the middle plate by establishing a temperature distribution model.

[0042] The temperature control system analyzes and processes the temperature data collected according to the preset temperature range. When it is detected that the temperature of the intermediate billet is lower than the preset lower limit, the central controller sends a signal to the heating unit, and the temperature control system automatically starts the heating unit set on the inner wall of the heat preservation cover 2, and the heating unit starts to work, and the heating unit generates heat to heat the intermediate billet for compensation.

[0043] In the embodiment of the present invention, the heating unit is an electric heating wire, which is made of a high temperature resistant and high resistance alloy material and has the characteristics of fast heating speed and good temperature uniformity. At the same time, the temperature adjustment system can also individually control the electric heating wires in the corresponding areas according to the temperature difference of different parts of the intermediate billet, so as to achieve precise adjustment of the temperature of the intermediate billet and ensure its temperature uniformity.

[0044] In an embodiment of the present invention, a cooling air duct is arranged inside the heat preservation cover 2, and the cooling air duct is connected to a cooling fan, and the cooling fan is used to transport cold air into the cooling air duct, and the cold air entering the cooling air duct exchanges heat with the heat preservation cover 2, and the cooling fan is connected to a central controller. A temperature sensor and a flow control valve are arranged at the air inlet and the air outlet of the heat preservation cover 2, and the temperature sensor transmits the collected temperature data to the central processing unit. By monitoring the temperature of the air inlet and the air outlet of the cooling air duct, the temperature control system automatically adjusts the opening of the flow control valve, realizes the adjustment of the opening of the air inlet and the air outlet, controls the intake of cold air and the discharge of hot air, thereby realizing further precise control of the temperature inside the heat preservation cover 2. At the same time, a cooling fan is also arranged inside the heat preservation cover 2, and by forced air circulation, the temperature inside the heat preservation cover 2 is made more uniform, which helps to improve the uniformity of the temperature control of the intermediate blank.

[0045] The intermediate board heat preservation device of the above structure has the following advantages:

[0046] 1. Excellent thermal insulation performance: The three-layer composite structure consisting of nano-aerogel insulation felt, ceramic fiber insulation cotton and high chromium-nickel austenitic stainless steel plate greatly reduces the heat conduction, convection and radiation losses, effectively reduces the heat loss of the intermediate billet during transportation, and ensures that the intermediate billet can maintain a high and uniform temperature before entering the finishing mill.

[0047] 2. Accurate temperature control: The temperature control system can monitor the temperature of the intermediate billet in real time and accurately, and automatically perform heating compensation and ventilation adjustment according to the actual temperature conditions. By individually controlling the electric heating wires in different parts and adjusting the flow control valves at the air inlet and outlet, the temperature of the intermediate billet is accurately controlled, ensuring the temperature uniformity of the intermediate billet and improving the quality stability of the billet products.

[0048] 3. Convenient operation and maintenance: The tilting frame 1 adopts a hydraulic cylinder connection design, and the cylinder can be remotely operated through the control system, which is convenient and fast. At the same time, the various components of the insulation cover adopt a modular design, which is easy to install, disassemble and maintain. During maintenance, you only need to open the insulation cover 2 to inspect and replace the internal equipment, which reduces downtime and improves production efficiency.

[0049] 4. High reliability and long service life: The outer layer of the heat preservation cover 2 is made of high-strength, corrosion-resistant high-chromium-nickel austenitic stainless steel plate, and the internal heat insulation and thermal insulation materials have good high temperature resistance and stability, and can operate stably for a long time in the harsh hot rolling production environment. In addition, the various components of the temperature monitoring and regulation system have been strictly screened and tested, and have high reliability and anti-interference ability, ensuring the overall performance and service life of the heat preservation cover.

[0050] Example

[0051] (I) Installation and debugging

[0052] 1. Above the intermediate billet transport roller of the rolling production line, the tilting frame 1 is installed according to the design requirements to ensure that the horizontality and verticality of its supporting frame meet the standards.

[0053] 2. Install the prepared insulation cover 2 on the inner side of the tilting frame 1 through the hanging shaft, and install the driving mechanism on one side of the tilting frame 1. During the installation process, pay attention to adjusting the gap between the insulation cover 2 and the transport roller frame to ensure good sealing performance.

[0054] 3. Install temperature sensors, electric heating wires, cooling fans, flow control valves and other equipment inside the heat preservation cover 2, and connect the corresponding wires and pipes. At the same time, connect the control lines of temperature sensors, hydraulic pumps, flow control valves and other equipment to the central processor of the control system.

[0055] 4. Check the overall structure of the heat preservation cover 2 to ensure that all parts are firmly connected and not loose. Then, debug the temperature monitoring and regulation system, set the preset temperature range, power parameters of the heating wire, opening of the flow control valve and other parameters. Test the control system by simulating the temperature change of the intermediate billet to ensure that it can accurately monitor and regulate the temperature.

[0056] (II) Usage process

[0057] 1. After the intermediate billet is rolled from the roughing mill, it is transported to the finishing mill through the transport roller. Before the intermediate billet enters the area covered by the heat preservation cover 2, the temperature control system automatically starts the cooling fan to circulate the air in the heat preservation cover 2.

[0058] 2. After the intermediate billet enters the heat preservation cover 2, the temperature control system collects the temperature data of the intermediate billet in real time through the temperature sensor and compares it with the preset temperature range. If the temperature of the intermediate billet is lower than the preset lower limit, the temperature control system automatically starts the electric heating wire to heat the intermediate billet. At the same time, according to the temperature difference of different parts of the intermediate billet, the temperature control system controls the electric heating wire of the corresponding area separately to ensure that the temperature of the intermediate billet rises evenly.

[0059] 3. During the heating process, the temperature control system monitors the temperature of the air inlet and outlet in real time, and automatically adjusts the opening of the flow control valve according to the temperature change. When the temperature inside the heat preservation cover 2 is too high, the opening of the flow control valve is increased to increase the amount of cold air entering the cooling air duct and the amount of hot air discharged, thereby reducing the temperature inside the heat preservation cover 2; when the temperature inside the heat preservation cover 2 is too low, the opening of the flow control valve is reduced to reduce the amount of cold air entering the cooling air duct and maintain a stable temperature inside the cover.

[0060] 4. During the transportation of the intermediate billet in the heat preservation cover 2, the temperature control system continuously monitors and adjusts the temperature of the intermediate billet to ensure that the intermediate billet maintains a high and uniform temperature during the entire transportation process. When the intermediate billet is transported to the entrance of the finishing mill, the temperature control system automatically turns off the electric heating wire and the cooling fan, opens the electric buckle locking device, rotates the heat preservation cover 2 open, and allows the intermediate billet to smoothly enter the finishing mill for rolling.

[0061] (III) Maintenance

[0062] 1. Regularly check the appearance of the thermal insulation cover 2 to see if the high chromium-nickel austenitic stainless steel plate is damaged, deformed, corroded, etc. If any problems are found, they should be repaired or replaced in time.

[0063] 2. Regularly clean the dust and debris inside the thermal insulation cover 2 to prevent dust and debris from accumulating on the thermal insulation and heat preservation materials, affecting the thermal insulation effect. At the same time, check whether the temperature sensor, electric heating wire, cooling fan, flow control valve and other equipment are damaged or faulty. If there is any problem, repair or replace it in time.

[0064] 3. Regularly calibrate and maintain the temperature control system to ensure that the temperature sensor has accurate measurement accuracy and the temperature control system has correct control parameters. At the same time, check whether the wires and pipes are aging or damaged, and replace them in time if there are any problems.

[0065] 4. When the heat preservation cover is not used for a long time, the equipment inside it should be cleaned and maintained, and the heat preservation cover body 2 should be closed to prevent dust and debris from entering.

[0066] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. The middle board insulation device is characterized by: It includes a heat-insulating cover for covering the intermediate billet transport path and a temperature regulating system arranged on the heat-insulating cover. The temperature regulating system includes a heating unit and a detection unit for detecting the temperature data of the intermediate billet. The heating module is configured to heat the intermediate billet when the temperature of the intermediate billet is lower than a preset lower limit value.

2. The intermediate sheet heat preservation device according to claim 1, characterized in that: A plurality of heating units are provided, and the heating units are distributed at different positions on the heat-insulating cover body.

3. The intermediate sheet heat preservation device according to claim 1, characterized in that: The heating unit is a temperature sensor. A plurality of temperature sensors are provided and the temperature sensors are distributed at different positions on the heat preservation cover.

4. The intermediate sheet heat preservation device according to any one of claims 1 to 3, characterized in that: The temperature regulation system also includes a data processing module and a central controller. The data processing module is connected to the detection unit. The data processing module transmits the preprocessed data to the central controller. The central controller analyzes the collected temperature data. The central controller determines whether the middle plate temperature meets the process requirements by establishing a temperature distribution model and determines the abnormal temperature area of ​​the middle plate.

5. The intermediate sheet heat preservation device according to any one of claims 1 to 3, characterized in that: The heating unit is an electric heating wire, which is made of a high-temperature-resistant and high-resistance alloy material.

6. The intermediate sheet heat preservation device according to any one of claims 1 to 5, characterized in that: The heat-insulating cover body comprises a base body, a heat-insulating layer and a heat-insulating layer arranged between the base body and the heat-insulating layer. The material of the heat-insulating layer is nano-aerogel heat-insulating felt.

7. The intermediate sheet heat preservation device according to claim 6, characterized in that: The material of the thermal insulation layer is ceramic fiber thermal insulation cotton.

8. The intermediate sheet heat preservation device according to any one of claims 1 to 7, characterized in that: A cooling air duct is arranged in the heat-insulating cover body, and the cooling air duct is connected to a cooling fan.

9. The intermediate sheet heat preservation device according to claim 8, characterized in that: Temperature sensors and flow regulating valves are arranged at the air inlet and the air outlet of the heat preservation cover body, and the temperature sensors transmit the collected temperature data to the central processor.

10. The intermediate sheet heat preservation device according to any one of claims 1 to 9, characterized in that: The heat-insulating cover is arranged on a tilting frame, the tilting frame is rotatably arranged, and the tilting frame is connected to a driving mechanism.

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