Device for roundness correction of inner cover of annular furnace

Abstract

A device for roundness correction of an inner cover of an annular furnace comprises a main machine, a hydraulic control system, a hydraulic valve stand and an electrical control system, and is characterized in that the main machine comprises a movable roller, a fixed roller, a supporting roller, a support, a movable roller position detection mechanism, a movable roller and fixed roller transmission mechanism and an inner cover rotation detection mechanism, and the movable roller is provided with a thrust hydraulic cylinder; the hydraulic control system comprises a hydraulic station and a control valve stand, the hydraulic station adopts a double pump to work, and the electric control system comprises an inner cover rotation detection alarm system, a position control electric control system and an inner cover rotation detection alarm system and is provided with a visual detection system. The device for roundness correction of the inner cover of the annular furnace has the advantages that the inner cover cannot crack in the roundness correction process, the roundness of the shape of the inner cover is kept after roundness correction, and perfect repair of the inner cover is achieved.

Description

Technical Field

[0001] The invention relates to a device for calibrating the circle, in particular to a device for calibrating the circle of an annular furnace inner cover. Background Art

[0002] In the current domestic silicon steel production process, the inner cover of the annular furnace is very easy to produce thermal shrinkage deformation after annealing in the annular furnace, which affects the production process of the next annealing.

[0003] At present, the rounding machines used for the inner cover of annular furnaces in China are basically extrusion-type rounding machines, but they can only extrude the outer shape of the inner cover into a roughly circular shape. However, after rounding, a wavy defect will be left at the lower part of the inner cover. In addition, the existing rounding machines generally have problems such as insufficient rounding capacity, resulting in long rounding time and difficulty in handling iron oxide scale during rounding.

[0004] The old-fashioned rounding machine can only extrude and correct the inner cover according to a preset shape. However, since it is not a complete arc shape during extrusion, the shape after extrusion and rounding has many waves. In addition, when the inner cover is fixed in position during extrusion, there is a probability that the lower part of the inner cover with large deformation will crack, thus scrapping the inner cover.

[0005] Therefore, the known circular furnace inner cover calibration method has the above-mentioned various inconveniences and problems. Summary of the invention

[0006] The purpose of the present invention is to provide a safe and reliable device for rounding the inner cover of an annular furnace.

[0007] To achieve the above purpose, the technical solution of the present invention is: A device for rounding the inner cover of an annular furnace, comprising a main engine, a hydraulic control system, a hydraulic valve station, and an electrical control system, characterized in that: The main machine includes a moving roller, a fixed roller, a support roller and a bracket, a moving roller position detection mechanism, a moving roller and a fixed roller roller transmission mechanism, and an inner cover rotation detection mechanism. The moving roller is provided with a thrust hydraulic cylinder and a rounding roller, which is used to rotate and extrude the inner cover and is used in pairs with the fixed roller; the fixed roller is provided with two rounding rollers and a bracket; the moving roller position detection mechanism is provided with a position detection device, a linkage mechanism, and a slide rail, which is used to detect the moving distance of the moving roller, and automatically adjust the roller gap when the furnace cover has a large deformation to make the rounding action continuous and uninterrupted; the moving roller and the fixed roller roller transmission mechanism is provided with a hydraulic motor and a gear transmission system, which transmits the rotational torque of the hydraulic motor to the rounding roller to round the inner cover; The hydraulic control system includes a hydraulic station and a control valve station. The hydraulic station uses a double pump, wherein a large-flow high-pressure pump is used for the forward and reverse rotation of the hydraulic motor; a small-flow low-pressure pump is used for the slow forward and backward rotation and extrusion of the extrusion hydraulic cylinder; the large-flow high-pressure pump and the small-flow low-pressure pump are combined to supply oil for the rapid forward and backward rotation of the extrusion hydraulic cylinder; the control valve station completes the pressure protection and control of the double pump, the forward and backward control of the extrusion hydraulic cylinder, and the forward and reverse rotation control of the hydraulic motor; The electrical control system includes an inner cover rotation detection alarm system and a position control electronic control system. The inner cover rotation detection alarm system is equipped with a visual detection system. During the calibration process, if a very large deformation point is encountered, there is a probability that the adjustment range of the position detection will be exceeded, causing the inner cover to get stuck while the calibration roller continues to rotate. When this happens, the visual detection system will issue a quotation and handle it manually.

[0008] The device for calibrating the inner cover of an annular furnace of the present invention can be further implemented by adopting the following technical measures.

[0009] The aforementioned device for rounding the inner cover of an annular furnace, wherein the flow rate and pressure of the extrusion hydraulic cylinder during operation are provided and controlled by a small flow hydraulic pump and a proportional valve, has the following two configuration modes: (1) Externally controlled constant pressure variable pump + dual proportional valves, where the first proportional valve is installed on the pilot pressure pipe of the externally controlled variable pump to control the output pressure of the variable pump under various working conditions; the second proportional valve is installed on the outlet overflow pipe of the variable pump to be responsible for pressure relief and pressure protection, achieving pressureless starting and various pressure protections under different working conditions; (2) Constant pressure variable pump + proportional valve, which has a pilot pressure reducing valve and a pilot relief valve installed on the rodless cavity pipeline of the extrusion hydraulic cylinder. The pilot pressure of the two valves is controlled by a proportional valve.

[0010] The aforementioned device for calibrating the inner cover of an annular furnace, wherein the countermeasures for the calibration jam are as follows: since the control system is divided into two control modes, manual and automatic, the countermeasures when the calibration jam is also divided into two types. In the manual control mode, after getting stuck, you should first click the "inner cover stuck" button to reduce the overflow proportional valve pressure. If it does not work, click the "inner cover recovery" and then click the "extrusion stop" button to stop extrusion. If it does not work, click the "extrusion with load micro-retreat" button on the operating console to leave enough space for extrusion. If it does not work, click the "furnace shell stop" button, repeatedly click the "furnace shell forward" (or furnace shell reverse) and "furnace shell stop" buttons to move the inner cover, and then slowly recover and pressurize; in the automatic control mode, if the inner cover gets stuck, the program will automatically repair it according to the automatic steps of the inner cover getting stuck. The specific actions of the equipment are as follows: stop extrusion, and if it does not recover, then slightly retreat to restore normal calibration. If the inner cover has not been able to calibrate normally during the micro-retreat process, switch to manual control and manual intervention.

[0011] The aforementioned device for calibrating the inner cover of an annular furnace, wherein the time for stopping extrusion is 5s.

[0012] After adopting the above technical solution, the device for calibrating the inner cover of an annular furnace of the present invention has the following advantages: 1. The inner cover will not crack during the rounding process; 2. The inner cover shape maintains roundness after rounding; 3. Achieve perfect repair of the inner cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a device for calibrating the inner cover of an annular furnace according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall installation of a device for calibrating the circularity of an annular furnace inner cover according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the overall installation of another device for rounding the inner cover of an annular furnace according to an embodiment of the present invention; Figure 4 It is a schematic diagram of a hydraulic system according to an embodiment of the present invention.

[0014] In the figure: 1 rounding machine frame; 2 fixed roller; 3 movable roller; 4 inner cover guide device; 5 movable roller position detection device; 6 main push cylinder; 7 hydraulic piping system, 8 bracket. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with embodiments and accompanying drawings.

[0016] Example 1 The device for calibrating the inner cover of an annular furnace of the present invention is a device for processing the thermal deformation of the inner cover of the annular furnace made of heat-resistant stainless steel in the silicon steel production process. It is suitable for calibrating the inner cover of the current annular furnace. When the inner cover of the annular furnace is taken out of the furnace, the inner cover is placed on the device, and the inner cover is calibrated by rotating and extruding the roller gap between the fixed roller and the movable roller.

[0017] The device for calibrating the inner cover of an annular furnace of the present invention is a mechatronic machine, comprising a host device, a hydraulic control system, and an electrical control operating system.

[0018] Please refer to Figure 1-Figure 4 , Figure 1 Schematic diagram of the structure of a device for calibrating the inner cover of an annular furnace according to an embodiment of the present invention. Figure 2The overall installation diagram of the device for rounding the inner cover of the annular furnace according to the embodiment of the present invention. As shown in the figure, the main equipment includes a moving roller 3, a fixed roller 2, a support roller and a bracket 8, a moving roller position detection mechanism, a moving roller and a fixed roller roller transmission mechanism, and an inner cover rotation detection mechanism, wherein the moving roller includes a thrust hydraulic cylinder and a rounding roller, wherein the inner cover guide device 4 is mainly used to rotate and extrude the inner cover and is used in pairs with the fixed roller. The fixed roller is composed of two rounding rollers and a bracket. The moving roller position detection mechanism mainly includes a moving roller position detection device 5, a linkage mechanism, a slide rail, etc., which is mainly used to detect the moving distance of the moving roller, and automatically adjust the roller gap when the inner cover has a large deformation to make the rounding action continuous and uninterrupted. The moving roller and the fixed roller roller transmission mechanism mainly include a hydraulic motor and a gear transmission system, which mainly transmits the rotational torque of the hydraulic motor to the rounding roller to round the inner cover.

[0019] The hydraulic control system includes a hydraulic station, a control valve station, etc. The hydraulic station uses a double pump. The large flow and high pressure pump is mainly used for the forward and reverse rotation of the hydraulic motor; the small flow and low pressure pump is mainly used for the slow forward and backward movement and extrusion of the extrusion hydraulic cylinder; the two pumps work together to supply oil for the rapid forward and backward movement of the extrusion hydraulic cylinder.

[0020] The hydraulic valve station completes the pressure protection and control of the double pump, the forward and backward control of the extrusion hydraulic cylinder, and the forward and reverse control of the hydraulic motor.

[0021] Figure 3 The hydraulic system diagram of the embodiment of the present invention is shown in FIG. The flow rate and pressure of the extrusion hydraulic cylinder when it is working are provided and controlled by a small flow hydraulic pump and a proportional valve, and there are two configuration modes: the first configuration and the second configuration: (1) Externally controlled constant pressure variable pump + dual proportional valves. The first proportional valve is installed in the pilot pressure pipe of the externally controlled variable pump to control the output pressure of the variable pump under various working conditions. During the operation of the extrusion hydraulic cylinder, different working pressures are required for forward, backward and extrusion, which can be achieved by pilot control of the variable pump through proportional valve 1.

[0022] The second proportional valve is installed at the outlet overflow pipe of the variable pump, responsible for pressure relief and pressure protection, realizing pressureless starting and various pressure protection under different working conditions. During the extrusion process, if the inner cover rebounds, proportional valve 2 also allows the release of overpressure and oil unloading.

[0023] The first configuration mode can realize stepless adjustment of the working pressure and protection pressure of the extrusion hydraulic cylinder in various working conditions, and the control is flexible.

[0024] The variable displacement pump achieves zero output during overpressure, saving energy and reducing consumption.

[0025] (2) Constant pressure variable pump + proportional valve, the pilot pressure reducing valve and the pilot relief valve are installed on the rodless cavity pipeline of the extrusion hydraulic cylinder, and the pilot pressure of the two valves is controlled by a proportional valve.

[0026] The second configuration mode can realize stepless adjustment of the working pressure and protection pressure of the extrusion hydraulic cylinder during the extrusion process, and the circuit and control are simple.

[0027] The electrical control system includes an inner cover rotation detection alarm system and a position control electronic control system. The inner cover rotation detection alarm system mainly includes a visual inspection system. If a very large deformation point is encountered during the calibration process, there is a probability that the position detection adjustment range will be exceeded, causing the inner cover to get stuck while the calibration roller continues to rotate. When this happens, the visual inspection system will issue a quotation and handle it manually.

[0028] Example 2 The circular calibration operation method of the device for circular calibration of the inner cover of an annular furnace of the present invention is as follows: 1. In manual control mode, use the buttons on the console and touch screen to perform corresponding operations. The specific process is as follows: 1. After the crane is lifted, the equipment moves forward without load. For specific operation, click the "Move forward without load" button on the console; 2. After the empty load moves forward to the right position, the equipment starts extrusion. For specific operation, click the "Extrusion Start" button on the HMI main screen; 3. The furnace shell starts to rotate. For specific operation, click the "Furnace Shell Forward" or "Furnace Shell Reverse" button on the operation table; 4. After the calibration is completed, the extrusion stops. For specific operation, click the "Extrusion Stop" button in the HMI main screen; 5. The furnace shell stops rotating. For specific operation, click the "furnace shell stop" button on the operation console; 6. No-load retreat: specific operation: click the "No-load retreat" button on the console; 7. Stop the hydraulic pump and prepare to lift the cover off. For specific operation, click the "Hydraulic Pump Stop" button on the console; 2. In the automatic control mode, click the buttons on the touch screen or the buttons on the console to operate. The specific operation process is as follows: 1. After the crane is lifted, click the "Auto Start" button on the screen or the "One-Key Start" button on the console to start the automatic control process; 2. After normal operation is completed, click the "Calibration Completed" button or the calibration time reaches 20 minutes to complete the automatic control process; There are two main interlocking conditions for the hydraulic pump, namely high oil temperature and low liquid level. When the oil temperature is too high or the liquid level is too low, the pump will stop and an alarm will be issued.

[0029] What to do if the school is stuck Since the control system has two control modes: manual and automatic, there are also two types of countermeasures when the calibration circle is stuck.

[0030] In manual control mode, after getting stuck, you should first click the "Inner cover stuck" button to reduce the overflow proportional valve pressure. If that doesn't work, click "Inner cover recovery" and then click the "Extrusion stop" button to stop extrusion. If that doesn't work, click the "Extrusion with load micro-retreat" button on the operating console to leave enough space for extrusion. If that doesn't work, click the "Furnace shell stop" button, repeatedly click the "Furnace shell forward" (or furnace shell reverse) and "Furnace shell stop" buttons to move the inner cover, and then slowly recover and pressurize.

[0031] In the automatic control mode, if the inner cover is stuck, the program will automatically repair it according to the automatic steps of the inner cover stuck. The specific actions of the equipment are as follows: stop squeezing (5s), and if it is not recovered, it will be slightly retreated to restore the normal calibration. If the inner cover cannot be calibrated normally during the slight retreat process, it will switch to manual control and manual intervention.

[0032] The present invention has substantial characteristics and significant technical progress. The device for rounding the inner cover of an annular furnace of the present invention requires that the inner cover in the annular furnace be placed on a rounding machine for rounding before the temperature has cooled down, and the rounding is performed by rotating and applying extrusion force. When the inner cover rotates on the rounding machine, the extrusion roller simultaneously rotates against the inner cover and gradually applies extrusion force to correct the shape of the inner cover. After the pressure of the inner cover is adaptively controlled, the inner cover will not crack during the rounding process, and the shape of the inner cover maintains roundness after rounding, thereby achieving perfect repair of the inner cover.

[0033] The above embodiments are only for the purpose of illustrating the present invention, but not for limiting the present invention. A person skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A device for rounding the inner cover of an annular furnace, comprising a main engine, a hydraulic control system, a hydraulic valve station, and an electrical control system, characterized in that: The main machine includes a moving roller, a fixed roller, a support roller and a bracket, a moving roller position detection mechanism, a moving roller and a fixed roller roller transmission mechanism, and an inner cover rotation detection mechanism. The moving roller is provided with a thrust hydraulic cylinder and a rounding roller, which is used to rotate and extrude the inner cover and is used in pairs with the fixed roller; the fixed roller is provided with two rounding rollers and a bracket; the moving roller position detection mechanism is provided with a position detection device, a linkage mechanism, and a slide rail, which is used to detect the moving distance of the moving roller, and automatically adjust the roller gap when the furnace cover has a large deformation to make the rounding action continuous and uninterrupted; the moving roller and the fixed roller roller transmission mechanism is provided with a hydraulic motor and a gear transmission system, which transmits the rotational torque of the hydraulic motor to the rounding roller to round the inner cover; The hydraulic control system includes a hydraulic station and a control valve station. The hydraulic station uses a double pump, wherein a large-flow high-pressure pump is used for the forward and reverse rotation of the hydraulic motor; a small-flow low-pressure pump is used for the slow forward and backward rotation and extrusion of the extrusion hydraulic cylinder; the large-flow high-pressure pump and the small-flow low-pressure pump are combined to supply oil for the rapid forward and backward rotation of the extrusion hydraulic cylinder; the control valve station completes the pressure protection and control of the double pump, the forward and backward control of the extrusion hydraulic cylinder, and the forward and reverse rotation control of the hydraulic motor; The electrical control system includes an inner cover rotation detection alarm system and a position control electronic control system. The inner cover rotation detection alarm system is equipped with a visual detection system. During the calibration process, if a very large deformation point is encountered, there is a probability that the adjustment range of the position detection will be exceeded, causing the inner cover to get stuck while the calibration roller continues to rotate. When this happens, the visual detection system will issue a quotation and handle it manually.

2. The device for rounding the inner cover of an annular furnace according to claim 1, characterized in that: The flow rate and pressure of the extrusion hydraulic cylinder when working are provided and controlled by a small flow hydraulic pump and a proportional valve, and there are the following two configuration modes: (1) Externally controlled constant pressure variable pump + dual proportional valves, where the first proportional valve is installed on the pilot pressure pipe of the externally controlled variable pump to control the output pressure of the variable pump under various working conditions; the second proportional valve is installed on the outlet overflow pipe of the variable pump to be responsible for pressure relief and pressure protection, achieving pressureless starting and various pressure protections under different working conditions; (2) Constant pressure variable pump + proportional valve, which has a pilot pressure reducing valve and a pilot relief valve installed on the rodless cavity pipeline of the extrusion hydraulic cylinder. The pilot pressure of the two valves is controlled by a proportional valve.

3. The device for rounding the inner cover of an annular furnace according to claim 1, characterized in that: The countermeasures for the stuck calibration are as follows: Since the control system is divided into manual and automatic control modes, the countermeasures for the stuck calibration are also divided into two types. In the manual control mode, after getting stuck, you should first click the "inner cover stuck" button to reduce the overflow proportional valve pressure. If not, click "inner cover recovery" and then click the "extrusion stop" button to stop extrusion. If not, click the "extrusion with load micro-retreat" button on the operating console to leave enough space for extrusion. If not, click the "furnace shell stop" button, repeatedly click the "furnace shell forward" and "furnace shell stop" buttons to move the inner cover, and then slowly recover and pressurize. In the automatic control mode, if the inner cover is stuck, the program will automatically repair it according to the automatic steps of the inner cover stuck. The specific actions of the equipment are as follows: stop extrusion, and if it is not recovered, then slightly retreat and resume normal calibration. If the inner cover has not been calibrated normally during the micro-retreat process, switch to manual control and manual intervention.

4. The device for rounding the inner cover of an annular furnace according to claim 3, characterized in that: The time for stopping extrusion is 5s.

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