Automatic pouring system for continuous casting machine

Abstract

The present invention provides an automatic pouring system for a continuous casting machine. The continuous casting machine is provided with a middle bag, the bottom of the middle bag has an opening, a stopper rod extends from top to bottom and blocks the opening, and comprises: a first detection device for detecting the current liquid level position in the continuous casting machine crystallizer; a first adjustment device connected to the first detection device for generating an adjustment signal according to the current liquid level position and a preset target liquid level position; a second adjustment device connected to the first adjustment device for generating a drive adjustment signal according to the first adjustment signal; a drive device respectively connected to the second adjustment device and the execution device for finally detecting the stopper rod position and forming a drive signal according to the stopper rod position and the drive adjustment signal; an execution device respectively connected to the drive device and the stopper rod for pulling up and pressing down the stopper rod according to the drive signal. The beneficial effect is that the system shortens the time of molten steel level fluctuation in the initial stage of pouring, so that automatic pouring and automatic control can be switched instantly without disturbance.

Description

Technical Field

[0001] The invention relates to the field of automatic pouring, and in particular to an automatic pouring system for a continuous casting machine. Background Art

[0002] A continuous casting machine is a mechanical device that directly casts high-temperature molten steel into billets. Under existing technologies, most continuous casting machines in China generally use manual pouring. Manual pouring has many disadvantages. It consumes a lot of labor intensity, the quality of the cast billets is inconsistent, and operating accidents may occur due to mistakes made by inexperienced operators. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides an automatic pouring system for a continuous casting machine, wherein the continuous casting machine is provided with a middle ladle, the bottom of the middle ladle has an opening, a stopper rod extends from top to bottom and blocks the opening, comprising:

[0004] A first detection device for detecting the current liquid level position in the continuous casting machine crystallizer;

[0005] a first regulating device connected to the first detecting device and configured to generate a regulating signal according to a current liquid level position and a preset target liquid level position;

[0006] a second regulating device, connected to the first regulating device, for generating a driving regulating signal according to the first regulating signal;

[0007] a driving device, connected to the second regulating device and the executing device respectively, for finally detecting the stopper rod position and forming a driving signal according to the stopper rod position and the driving regulating signal;

[0008] An actuator is connected to the driving device and the stopper rod respectively, and is used to pull up and press down the stopper rod according to the driving signal.

[0009] Preferably, the automatic pouring system of the continuous casting machine, the first detection device, the first adjustment device, the second adjustment device and the driving device are formed in a controller.

[0010] Preferably, the controller of the automatic pouring system of the continuous casting machine includes a programmable logic controller.

[0011] Preferably, in the automatic pouring system of the continuous casting machine, the actuator includes a motor and a transmission mechanism, the motor signal is connected to the drive device, and the transmission mechanism is driven to pull up and press down the stopper rod according to the rotation of the drive signal.

[0012] Preferably, the transmission mechanism of the automatic pouring system of the continuous casting machine is an electric cylinder.

[0013] Preferably, a method for automatic pouring of a continuous casting machine is applied to an automatic pouring system of a continuous casting machine, and is characterized in that it comprises the following steps:

[0014] Step S1, starting the automatic pouring process according to an automatic pouring instruction;

[0015] Step S2, pulling up the stopper rod to a first predetermined position and maintaining it for a first predetermined time;

[0016] Step S3, pressing the stopper rod down to close the opening or to a second predetermined position, and maintaining it for a second predetermined time, the second predetermined position being lower than the first predetermined position;

[0017] Step S4, pulling up the stopper rod to a third predetermined position and maintaining it for a third predetermined time, wherein the third predetermined position is higher than the second predetermined position and lower than the first predetermined position;

[0018] Step S5, pressing the stopper rod down to a fourth predetermined position, so that the molten steel is stably and continuously injected into the crystallizer until the current liquid level position meets the starting drawing speed of the straightening machine. The fourth predetermined position is higher than the second predetermined position and lower than the third predetermined position;

[0019] Step S6: Enter the automatic control process.

[0020] Preferably, in the automatic pouring system of the continuous casting machine, the automatic control process in step S6 comprises the following steps:

[0021] Step S61, determining the relationship between the current liquid level position and the target liquid level position in the crystallizer, if the current liquid level position is less than the target liquid level position, executing step S62, otherwise executing step S63;

[0022] Step S62, pull up the stopper rod so that the stopper rod is raised by a distance corresponding to the difference between the current liquid level position and the target liquid level position, and return to step S61;

[0023] Step S63, press the stopper rod down so that the stopper rod is lowered by a distance corresponding to the difference between the current liquid level position and the target liquid level position, and return to step S61.

[0024] Preferably, the automatic pouring system for the continuous casting machine further comprises the following steps before step S1:

[0025] Step A1, judging whether various parameters of the continuous casting machine are ready for the continuous casting process, if not, exiting;

[0026] Step A2, judging whether the parameters of the tundish car are ready for the continuous casting process, if not, repeating step A2;

[0027] Step A3: determine whether the ladle of molten steel is ready, if not, repeat step A3.

[0028] Preferably, the automatic pouring system of the continuous casting machine comprises the following steps in step A2:

[0029] Step A21, determining whether the first detection device is ready, if not, repeating step A21;

[0030] Step A22, determining whether the first regulating device, the second regulating device, the driving device and the executing device are ready, if not, repeating step A22;

[0031] Step A23, clearing the current liquid level position and setting the stopper rod position to the initial position.

[0032] The above technical solution has the following advantages or beneficial effects: This automatic pouring system is mainly operated by one button on site, which greatly reduces manual labor, shortens the time of molten steel level fluctuation in the initial stage of pouring, reduces the liquid level fluctuation in the initial stage of pouring, improves the quality of the casting, and enables automatic pouring and automatic control to switch instantly without disturbance, truly realizing one-button automatic pouring of the continuous casting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The schematic diagram of the principle of the automatic pouring system of the continuous casting machine in the preferred embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the pouring process of the automatic pouring system of the continuous casting machine in a preferred embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the automatic control flow of the automatic pouring system of the continuous casting machine in a preferred embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the pouring preparation process of the automatic pouring system of the continuous casting machine in a preferred embodiment of the present invention;

[0037] Figure 5 The present invention is a schematic diagram of the device preparation process of the automatic pouring system of the continuous casting machine in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment, and other embodiments may also fall within the scope of the present invention as long as they conform to the gist of the present invention.

[0039] In a preferred embodiment of the present invention, based on the above problems existing in the prior art, an automatic pouring system for a continuous casting machine is provided. The continuous casting machine is provided with a middle bag, the bottom of the middle bag has an opening, and a stopper rod 2 extends from top to bottom and blocks the opening. Figure 1 As shown, specifically including:

[0040] a first detection device 41, for detecting the current liquid level position in the continuous casting machine crystallizer 1;

[0041] a first regulating device 42, connected to the first detecting device 41, for generating a regulating signal according to a current liquid level position and a preset target liquid level position;

[0042] a second regulating device 43, connected to the first regulating device 42, for generating a driving regulating signal according to the first regulating signal;

[0043] a driving device 44, connected to the second regulating device 43 and the executing device 3, respectively, for finally detecting the position of the stopper rod 2, and driving the regulating signal according to the position of the stopper rod 2 to form a driving signal;

[0044] An actuator 3 is connected to the driving device 44 and the stopper rod 2 respectively, and is used to pull up and press down the stopper rod 2 according to the driving signal.

[0045] A specific embodiment is now provided to further illustrate and describe the technical solution:

[0046] This automatic control system controls the flow of molten steel from the tundish to the crystallizer and the operation of the straightening machine by utilizing all devices, so as to automatically start the pouring of the mechanism. The controller 4 controls the opening of the bottom opening of the tundish by pressing down and pulling up the stopper rod 2 through the actuator 3, so that the molten steel is continuously and stably injected into the crystallizer 1. The first detection device 41 can detect the liquid level position of the molten steel flowing into the crystallizer 1 in real time, and send the liquid level position information to the first adjustment device 42 for comparison with the preset target liquid level. After determining whether the target liquid level is reached, an adjustment signal is generated. The second adjustment device 43 receives the adjustment signal of the first adjustment device 42 and forms a drive adjustment signal. The drive device 44 that collects the drive adjustment signal combines the current position of the stopper rod 2, and then converts the drive adjustment signal into a drive signal and sends it to the actuator 3. Finally, the actuator 3 controls the position of the stopper rod 2 to pull up and press down through the drive signal.

[0047] In a preferred embodiment of the present invention, the first detection device 41 , the first adjustment device 42 , the second adjustment device 43 and the driving device 44 are formed in a controller 4 .

[0048] Specifically, in this embodiment, the entire controller 4 can control the execution device 3 to adjust the position of the stopper rod 2 by utilizing the states of each device and the collected information.

[0049] In a preferred embodiment of the present invention, the controller 4 comprises a programmable logic controller.

[0050] Specifically, in this embodiment, the editable logic controller can open parameter setting permissions, and can modify and set parameters according to different steel bodies and cross sections.

[0051] In a preferred embodiment of the present invention, the actuator 3 includes a motor 31 and a transmission mechanism. The motor 31 is connected to the driving device 44 by a signal, and the transmission mechanism is driven to pull up and press down the stopper rod 2 according to the rotation of the driving signal.

[0052] Specifically, in this embodiment, it is ensured that the rotation of the motor 31 driven by the driving device 44 can drive the transmission mechanism to pull up and press down the plug rod 2 .

[0053] In a preferred embodiment of the present invention, the transmission mechanism is an electric cylinder 32 .

[0054] Specifically, in this embodiment, the use of the electric cylinder 32 as a transmission mechanism can convert the rotational motion of the motor 31 into linear motion, and the use of a high-precision and high-power electric cylinder 32 can ensure sufficient power and achieve high-intensity operation.

[0055] As a preferred embodiment, the transmission mechanism can be connected to the pressure rod for manually operating the stopper rod 2 in the prior art, and the pressure rod is driven by the transmission mechanism to realize the pulling up and pressing down of the stopper rod 2. When manual operation is required, the pressure rod can also be directly manually operated to realize the pulling up and pressing down of the stopper rod 2.

[0056] In a preferred embodiment of the present invention, a method for automatically starting pouring of a continuous casting machine is applied to an automatic pouring system of a continuous casting machine, such as Figure 2 As shown, the following steps are included:

[0057] Step S1, starting the automatic pouring process according to an automatic pouring instruction;

[0058] Step S2, pulling up the stopper rod 2 to a first predetermined position and maintaining it for a first predetermined time;

[0059] Step S3, pressing the stopper rod 2 down to close the opening or to a second predetermined position, and maintaining it for a second predetermined time, the second predetermined position being lower than the first predetermined position;

[0060] Step S4, pulling up the stopper rod 2 to a third predetermined position and maintaining it for a third predetermined time, wherein the third predetermined position is higher than the second predetermined position and lower than the first predetermined position;

[0061] Step S5, pressing the stopper rod 2 down to a fourth predetermined position, so that the molten steel is stably and continuously injected into the crystallizer 1, until the current liquid level position meets the starting drawing speed of the straightening machine, and the fourth predetermined position is higher than the second predetermined position and lower than the third predetermined position;

[0062] Step S6: Enter the automatic control process.

[0063] Specifically, in the present embodiment, the above-mentioned first predetermined position makes the bottom opening of the tundish open widely, and the specific position can be based on the experience position of manual pouring, and after reaching the first predetermined position, it is maintained for a first predetermined time; then the stopper rod 2 is pressed down to the second predetermined position, and the second predetermined position makes the bottom opening of the tundish very small or closed, and then maintained at this position for a second predetermined time; the stopper rod 2 is pulled up to the third predetermined position again, so that the bottom opening of the tundish is opened to a larger position, and then maintained for a third predetermined time; finally, the stopper rod 2 is pressed down to the fourth predetermined position to open the bottom opening of the tundish to a smaller position, so that the molten steel flows stably and continuously into the crystallizer 1 under the action of static pressure until the liquid level position of the crystallizer 1 meets the liquid level of the starting speed of the straightening machine, at which time the straightening machine is started and the system is put into automatic control.

[0064] In a preferred embodiment of the present invention, Figure 3 As shown, the automatic control process in step S6 includes the following steps:

[0065] Step S61, determining the relationship between the current liquid level position and the target liquid level position in the crystallizer 1, if the current liquid level position is less than the target liquid level position, executing step S62, otherwise executing step S63;

[0066] Step S62, pull up the stopper rod 2, so that the stopper rod 2 is raised by a distance corresponding to the difference between the current liquid level position and the target liquid level position, and return to step S61;

[0067] Step S63, press the stopper rod 2 so that the stopper rod 2 is lowered by a distance corresponding to the difference between the current liquid level position and the target liquid level position, and return to step S61.

[0068] Specifically, in this embodiment, after the system enters the automatic control process, it is necessary to detect in real time the positional relationship between the current liquid level of the crystallizer 1 and the preset liquid level. If the current liquid level has not reached the preset liquid level, it is necessary to pull up the stopper rod 2 until the detection result shows that the current liquid level has reached the preset liquid level; otherwise, it is necessary to press down the stopper rod 2 so that the distance the stopper rod 2 is lowered corresponds to the difference between the current liquid level and the preset liquid level, and continue to detect the liquid level position.

[0069] In a preferred embodiment of the present invention, Figure 4 As shown, before step S1, the following steps are also included:

[0070] Step A1, judging whether various parameters of the continuous casting machine are ready for the continuous casting process, if not, exiting;

[0071] Step A2, judging whether the parameters of the tundish car are ready for the continuous casting process, if not, repeating step A2;

[0072] Step A3: determine whether the ladle of molten steel is ready, if not, repeat step A3.

[0073] Specifically, in this embodiment, after the system receives the automatic pouring command, it is necessary to determine whether the various parameters of the continuous casting machine are ready for the continuous casting process, whether the various parameters of the middle ladle car are ready for the continuous casting process, and whether the large ladle of molten steel is ready, otherwise the next instruction cannot be carried out.

[0074] In a preferred embodiment of the present invention, Figure 5 As shown, step A2 includes the following steps:

[0075] Step A21, determining whether the first detection device 41 is ready, if not, repeating step A21;

[0076] Step A22, determining whether the first regulating device 42, the second regulating device 43, the driving device 44 and the executing device 3 are ready, if not, repeating step A22;

[0077] Step A23, clearing the current liquid level position and setting the stopper rod 2 position to the initial position.

[0078] Specifically, in this embodiment, after the system receives the automatic pouring start instruction, it is necessary to determine whether the first detection device 41, the first adjustment device 42, the second adjustment device 43, the drive device 44, and the execution device 3 are ready, otherwise the system will repeat this step until the preparation is completed; in addition, the liquid level position needs to be cleared and the stopper rod 2 needs to be set to the initial position.

[0079] To sum up, this automatic pouring system is mainly operated by one button on site, which greatly reduces manual labor, shortens the time of molten steel level fluctuation in the initial stage of pouring, reduces the liquid level fluctuation in the initial stage of pouring, improves the quality of castings, and enables automatic pouring and automatic control to switch instantly without disturbance, truly realizing one-button automatic pouring of the continuous casting machine.

[0080] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. A method for automatically starting casting of a continuous casting machine, wherein the continuous casting machine is provided with a tundish, the bottom of the tundish has an opening, a stopper rod extends from top to bottom into and blocks the opening, characterized in that: The automatic pouring system of continuous casting machine includes: A first detection device for detecting the current liquid level position in the continuous casting machine crystallizer; a first regulating device, connected to the first detecting device, for generating a regulating signal according to the current liquid level position and a preset target liquid level position; a second regulating device, connected to the first regulating device, and configured to generate a driving regulating signal according to the first regulating signal; a driving device, connected to the second adjusting device and the executing device respectively, for finally detecting the stopper rod position and forming a driving signal according to the stopper rod position and the driving adjusting signal; an actuator, connected to the driving device and the stopper rod, respectively, for pulling up and pressing down the stopper rod according to the driving signal; The automatic pouring method of the continuous casting machine comprises the following steps: Step S1, starting the automatic pouring process according to an automatic pouring instruction; Step S2, pulling up the stopper rod to a first predetermined position and maintaining it for a first predetermined time; Step S3, pressing the stopper rod down to close the opening or to a second predetermined position, and maintaining the stopper rod at the second predetermined position for a second predetermined time, wherein the second predetermined position is lower than the first predetermined position; Step S4, pulling up the stopper rod to a third predetermined position and maintaining it for a third predetermined time, wherein the third predetermined position is higher than the second predetermined position and lower than the first predetermined position; Step S5, pressing the stopper rod down to a fourth predetermined position, so that the molten steel is stably and continuously injected into the crystallizer until the current liquid level position meets the starting speed of the straightening machine, and the fourth predetermined position is higher than the second predetermined position and lower than the third predetermined position; Step S6: Enter the automatic control process.

2. The automatic pouring method for continuous casting machine according to claim 1, characterized in that: The first detection device, the first adjustment device, the second adjustment device and the driving device are formed in a controller.

3. The automatic pouring method for continuous casting machine according to claim 2, characterized in that: The controller comprises a programmable logic controller.

4. The automatic pouring method for a continuous casting machine according to claim 1, characterized in that: The actuator includes a motor and a transmission mechanism. The motor signal is connected to the drive device, and the motor rotates according to the drive signal to drive the transmission mechanism to pull up and press down the stopper rod.

5. The automatic pouring method for continuous casting machine according to claim 4, characterized in that: The transmission mechanism is an electric cylinder.

6. The automatic pouring method for continuous casting machine according to claim 5, characterized in that: The automatic control process in step S6 includes the following steps: Step S61, determining the relationship between the current liquid level position in the crystallizer and the target liquid level position, if the current liquid level position is less than the target liquid level position, executing step S62, otherwise executing step S63; Step S62, pull up the stopper rod so that the stopper rod is raised by a distance corresponding to the difference between the current liquid level position and the target liquid level position, and return to step S61; Step S63, pressing down the stopper rod so that the stopper rod is lowered by a distance corresponding to the difference between the current liquid level position and the target liquid level position, and returning to step S61.

7. The automatic pouring method for a continuous casting machine according to claim 6, characterized in that: The step S1 also includes the following steps: Step A1, judging whether various parameters of the continuous casting machine are ready for the continuous casting process, if not, exiting; Step A2, judging whether the parameters of the tundish car are ready for the continuous casting process, if not, repeating the step A2; Step A3, determine whether the ladle of molten steel is ready, if not, repeat step A3.

8. The automatic pouring method for continuous casting machine according to claim 7, characterized in that: The step A2 includes the following steps: Step A21, determining whether the first detection device is ready, if not, repeating step A21; Step A22, determining whether the first regulating device, the second regulating device, the driving device and the executing device are ready, if not, repeating step A22; Step A23, clearing the current liquid level position and setting the stopper rod position to an initial position.

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