Control method and system for steel turning of billet continuous casting machine

Abstract

The embodiment of the present invention provides a control method and a steel turning system for a billet continuous casting machine to turn steel separately, and relates to the technical field of metallurgy and steelmaking. The method is applied to a control unit, which is arranged on a continuous casting machine, and the continuous casting machine is provided with a plurality of casting strands, each casting strand is used to cast the casting strand, and a detection unit is arranged on the end roller of each casting strand, and the detection unit is connected to the control unit. The method comprises: in response to the casting strand in place signal sent by the detection unit of each casting strand, an instruction to stop the roller of the corresponding casting strand is sent to the continuous casting machine, and the casting strand to be turned over is determined according to a preset rule, and when other casting strands other than the casting strand to be turned over continue to wait, the steel turning unit at the casting strand to be turned over is controlled to perform the action of turning over the casting strand. The embodiment of the present invention solves the problem that the existing steel turning unit starts turning over steel when the casting strands of each casting strand reach the steel turning position at the same time, which causes the hydraulic system working pressure to prevent the steel turning unit from turning over the casting strand.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgy and steelmaking, and in particular to a control method and a steel turning system for a square billet continuous casting machine. Background Art

[0002] The existing continuous casting machine steel turning unit is arranged at the billet discharge roller of each casting strand. When the billet on each casting strand reaches a predetermined position, the steel turning unit will perform an action of turning the billet to the upper slideway.

[0003] The above arrangement has the following disadvantages: the billet continuous casting machine is composed of multiple casting strands, and multiple casting strands are produced simultaneously. When the billets of multiple casting strands arrive at the steel turning position of the billet discharge roller at the same time, the steel turning units of each casting strand may start to turn the steel at the same time. Since the steel turning unit is driven by a hydraulic cylinder, the simultaneous action of the hydraulic cylinders of the steel turning units of each strand will cause the working pressure of the hydraulic system, so that the steel turning unit cannot turn the billet to the upper slide, or the steel turning unit moves slowly, affecting the normal production. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a control method and a steel turning system for separate steel turning of a square billet continuous casting machine, so as to solve the problem that the existing steel turning units start turning steel simultaneously when the billets of each casting stream reach the steel turning position at the same time, resulting in the working pressure of the hydraulic system preventing the steel turning unit from turning the billets.

[0005] In order to achieve the above purpose, the technical solution adopted by the embodiment of the present invention is as follows:

[0006] In a first aspect, an embodiment of the present invention provides a control method for respectively turning steel in a billet continuous casting machine, which is applied to a control unit, wherein the control unit is arranged on the continuous casting machine, the continuous casting machine is provided with a plurality of casting strands, each of the casting strands is used for casting the billet, and a detection unit is arranged on the end roller of each casting strand, and the detection unit is connected to the control unit, and the method comprises:

[0007] In response to the in-place signal of the casting strand sent by the detection unit of each casting strand, an instruction to stop the roller table corresponding to the casting strand is sent to the continuous casting machine;

[0008] The casting strand to be turned over is determined according to preset rules, and while the casting strands other than the casting strand to be turned over continue to wait, the turning unit at the casting strand to be turned over is controlled to perform the action of turning over the ingot.

[0009] In an optional embodiment, each of the strands is marked with a corresponding ID value, and the step of determining the strand to be turned according to a preset rule includes:

[0010] Obtaining the ID value corresponding to each casting strand;

[0011] Timing is performed according to the preset interval time and an intermediate variable signal is output;

[0012] Accumulate according to the intermediate variable signal and record the accumulated value;

[0013] The accumulated value is compared with the ID value corresponding to the casting strand obtained most recently. If the accumulated value is the same as the ID value corresponding to the casting strand, the casting strand is determined to be the casting strand to be turned over.

[0014] In an optional embodiment, the method further comprises:

[0015] Comparing the ID values ​​corresponding to the casting strands to determine the maximum ID value;

[0016] The accumulated value is compared with the maximum ID value. If the accumulated value is the same as the maximum ID value, a reset operation is performed and accumulation is performed again according to the intermediate variable signal.

[0017] In an optional implementation, the interval time is greater than or equal to 1S.

[0018] In an optional embodiment, the steel turning unit includes an intermediate relay and a hydraulic component, the intermediate relay is connected to the control unit and the hydraulic component, and the steel turning unit at the casting strand to be turned over is controlled to perform the action of turning over the cast strand, including:

[0019] An instruction allowing steel turning is sent to the intermediate relay, so that the coil of the intermediate relay is energized and drives the hydraulic component to work, thereby executing the action of turning the ingot.

[0020] In an optional embodiment, the hydraulic assembly includes a solenoid valve and a hydraulic cylinder, the intermediate relay is connected to the solenoid valve, and the solenoid valve is arranged on the hydraulic cylinder and connected to the hydraulic cylinder;

[0021] The solenoid valve is used to drive the hydraulic cylinder to work when the coil of the intermediate relay is energized;

[0022] The hydraulic cylinder is used to drive the steel turning assembly to turn over the ingot under the drive of the solenoid valve.

[0023] In an optional implementation, the intermediate relay is a 24VDC relay or a 220VAC relay.

[0024] In a second aspect, an embodiment of the present invention provides a steel turning system for a billet continuous casting machine to turn steel separately, the steel turning system comprising: a control unit, a plurality of detection units, a plurality of steel turning units and a continuous casting machine, the control unit being connected to each of the detection units and each of the steel turning units;

[0025] The control unit is used to execute the control method for respectively turning steel in a billet continuous casting machine as described in any one of the aforementioned embodiments;

[0026] Each of the detection units is arranged on a roller table at the end of the continuous casting machine, and is used to detect the position of the cast billet and generate a signal that the cast billet is in place;

[0027] Each of the steel turning units is used for turning the cast billet.

[0028] In an optional embodiment, the control unit is a PLC.

[0029] In an optional embodiment, a timer and an accumulator are provided in the PLC;

[0030] The timer is used to time according to a preset interval time and output an intermediate variable signal;

[0031] The accumulator is used to accumulate according to the intermediate variable signal and record the accumulated value.

[0032] The beneficial effects of the embodiments of the present invention include, for example:

[0033] The embodiment of the present invention provides a control method and a steel turning system for turning steel separately in a square billet continuous casting machine. By designing a control unit to determine the casting strand to be turned according to a preset rule, the function of turning steel separately for each casting strand can be realized. After the casting strand to be turned is determined, the steel turning unit at the casting strand to be turned will turn steel, and the steel turning units at other casting strands can only continue to wait for steel turning, and there is no possibility of turning steel at the same time. This design ensures that each steel turning unit works at the system pressure, ensuring that the steel turning action is normal, and solves the problem that the existing steel turning units start turning steel simultaneously when the casting strands of each casting strand reach the steel turning position at the same time, resulting in the hydraulic system working pressure preventing the steel turning unit from turning the casting strand.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 An exemplary structural block diagram of a steel turning system for a billet continuous casting machine provided by an embodiment of the present invention is shown;

[0037] Figure 2 A schematic flow chart of a method for controlling steel turning of a billet continuous casting machine provided by an embodiment of the present invention is shown;

[0038] Figure 3 A second flow chart of a method for controlling steel turning of a billet continuous casting machine provided by an embodiment of the present invention is shown;

[0039] Figure 4 A third flow chart of a method for controlling steel turning of a billet continuous casting machine provided by an embodiment of the present invention is shown;

[0040] Figure 5 One of the logic ladder diagrams of a control method for respectively turning steel in a billet continuous casting machine provided by an embodiment of the present invention is shown;

[0041] Figure 6 The second logic ladder diagram of a control method for respectively turning steel in a billet continuous casting machine provided by an embodiment of the present invention is shown;

[0042] Figure 7 The third logic ladder diagram of a control method for separately turning steel in a billet continuous casting machine provided by an embodiment of the present invention is shown.

[0043] Icons: 200-steel turning system; 201-detection unit; 202-control unit; 203-steel turning unit; 204-continuous casting machine. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0046] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0047] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0048] See also Figure 1 , Figure 1 An exemplary structural block diagram of a steel turning system 200 provided in an embodiment of the present invention is shown. The steel turning system 200 may include a detection unit 201, a control unit 202, a steel turning unit 203 and a continuous casting machine 204.

[0049] Among them, the detection unit 201 is used to detect the position of the ingot, and the control unit 202 is used to exchange data with the detection unit 201 and the steel turning unit 203, so as to control the action of the steel turning unit 203 according to the signal of the detection unit 201, and the steel turning unit 203 is used to turn the ingot. The detection unit 201 can be a thermal detection device such as a thermal detector, and can be set at the end roller of each casting strand of the continuous casting machine 204. When the ingot to be processed is transported to the end of each casting strand through the roller, the detection unit 201 will send a signal of the ingot being in place to the control unit 202, so that the control unit 202 can collect and issue instructions to the steel turning unit 203 to perform the corresponding steel turning operation.

[0050] Furthermore, the control unit 202 may be a controller such as a PLC or a single-chip microcomputer, and various modules are provided in the controller to realize different functions. For example, a memory, a processor, and a communication module may be provided in the controller, and the memory, the processor, and the communication module are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, these components may be electrically connected to each other through one or more communication buses or signal lines.

[0051] See also Figure 2 , Figure 2The flow chart of a control method for turning steel in a billet continuous casting machine provided by an embodiment of the present invention is shown. The control method is applied to a control unit 202, which is arranged on a continuous casting machine 204. The continuous casting machine 204 is provided with a plurality of casting strands, each of which is used for casting a billet. A detection unit 201 is arranged on the end roller of each casting strand, and the detection unit 201 is connected to the control unit 202. Figure 2 As shown, the above control method may include S110 and S120:

[0052] S110, in response to the in-place signal of the casting strand sent by the detection unit 201 of each casting strand, sending an instruction for stopping the roller table corresponding to the casting strand to the continuous casting machine 204.

[0053] S120, determining the casting strand to be turned according to a preset rule, and controlling the turning unit 203 at the casting strand to be turned to turn the ingot while the other casting strands other than the casting strand to be turned continue to wait.

[0054] The above steps realize the function of turning the ingots of each casting strand separately.

[0055] Among them, step S110 is the process of detecting the position of the ingot of each casting strand. When the detection unit 201 detects that the ingot has reached the end roller of each casting strand, it will send a signal that the ingot is in place to the control unit 202. After receiving the signal, the control unit 202 controls the continuous casting machine 204 to stop the roller where the ingot is in place and wait for the steel turning instruction.

[0056] After the rollers at the positions where the ingots have been placed stop running, step S120 is continued to be executed, and the ingot strand to be turned over is determined according to a preset rule and the turning operation is performed.

[0057] It should be noted that the preset rule in step S120 may be to determine the steel strands to be turned according to a certain preset interval time, so that each strand can delay turning. The preset rule may also be to output a value corresponding to each strand according to a specific module (e.g., a timing accumulation module) in the control unit 202, so that the steel turning unit 203 at the strand with the same value is actuated.

[0058] The embodiment of the present invention provides a control method for turning steel separately in a square billet continuous casting machine. By designing a control unit 202 to determine the casting strand to be turned according to a preset rule, the function of turning steel separately in each casting strand can be realized. After the casting strand to be turned is determined, the steel turning unit 203 at the casting strand to be turned will turn steel. The steel turning units 203 at other casting strands can only continue to wait for steel turning, and there is no possibility of turning steel at the same time. This design ensures that each steel turning unit 203 works at the system pressure to ensure normal steel turning action, and solves the problem that the existing steel turning unit 203 starts turning steel at the same time when the casting strands of each strand reach the steel turning position at the same time, resulting in the hydraulic system working pressure preventing the steel turning unit 203 from turning the casting strand.

[0059] It can be understood that, depending on the power of the hydraulic system, the determined casting strands to be turned can be single or multiple. If the determined casting strands to be turned are two or more, it is sufficient to ensure that the hydraulic system can reliably turn one or more determined casting strands to be turned.

[0060] See also Figure 3 , Figure 3 The second flow chart of a control method for separately turning steel in a square billet continuous casting machine provided in an embodiment of the present invention is shown, each casting strand is marked with a corresponding ID value, and the step of determining the casting strand to be turned according to preset rules can be implemented through S121 to S124.

[0061] S121, obtaining the ID value corresponding to each casting strand.

[0062] S122, timing according to a preset interval time, and outputting an intermediate variable signal.

[0063] S123, performing accumulation according to the intermediate variable signal and recording the accumulated value.

[0064] S124, comparing the accumulated value with the ID value corresponding to the casting strand obtained most recently, and if the accumulated value is the same as the ID value corresponding to the casting strand, determining the casting strand as the casting strand to be turned over.

[0065] The above steps can realize the function of accumulating the casting strands of the continuous casting machine 204 .

[0066] It should be noted that, when the billets of each casting strand arrive at the billet discharge roller at the same time, the steel turning units 203 of the existing continuous casting machine 204 will operate simultaneously. At this time, each detection unit 201 will generate a pulse at the same time. The control unit 202 of the continuous casting machine 204 cannot distinguish the pulse signals of each casting strand, and cannot accurately count how many billets the steel turning unit 203 has turned, resulting in inaccurate counting and affecting subsequent operations. Intervention through manual operation also has great risks, which affects normal production and increases the labor intensity of operators. Therefore, the above steps S121 to S124 can well solve the problem that the control unit 202 of the existing continuous casting machine 204 cannot accurately count.

[0067] Among them, step S121 is the process of parameter acquisition, and each casting strand corresponds to a corresponding ID value. For example, if the continuous casting machine 204 for this steel turning operation has 6 strands, it means that the ID value corresponding to each casting strand is 1 to 6. The control unit 202 first obtains the ID value corresponding to each casting strand, and performs subsequent operations based on the ID value.

[0068] After the ID value corresponding to each casting strand is obtained, steps S122 and S123 are continued to be executed, and the timing accumulation processing is performed according to the preset interval time.

[0069] In the embodiment of the present invention, the timing accumulation process is divided into two steps, and each step can be implemented by different modules of the control unit 202, for example, a timing module and an accumulation module. First, an interval time is set, and the timing module performs timing according to the interval time. During the timing process, the timing module generates a high-level signal every interval time, and the accumulation module performs an accumulation operation (for example, adding 1) after receiving the signal.

[0070] After recording the accumulated value, the step S124 is continued to be executed to determine the ID value corresponding to the casting strand obtained the most recently and compare it with the accumulated value. If they are the same, the casting strand is determined as the casting strand to be turned over, so that the corresponding turning operation can be performed at the casting strand later. In this step, when the billets of each casting strand are in place, the corresponding turning operation will only be performed on the casting strand determined to be turned over, and the turning operation will not be performed at the same time when the billets of each casting strand are in place.

[0071] See also Figure 4 , Figure 4 The third flow chart of a method for controlling the separate steel turning of a billet continuous casting machine provided by an embodiment of the present invention is shown. Based on steps S121 to S124, the above step S120 also includes steps S125 to S126.

[0072] S125, comparing the ID values ​​corresponding to the casting strands to determine the maximum ID value.

[0073] S126, comparing the accumulated value with the maximum ID value, if the accumulated value is the same as the maximum ID value, performing a zeroing operation, and re-accumulating according to the intermediate variable signal.

[0074] During the execution of the above steps S121 to S124, the accumulated value will increase in sequence according to the time interval. If the increasing value keeps increasing, the correct cast strand to be turned cannot be determined. Therefore, it is necessary to determine the maximum ID value. When the accumulated value reaches the maximum ID value, it will be reset to zero and the accumulation cycle will be repeated, that is, the accumulated value will not be greater than the maximum ID value (for example, the continuous casting machine 204 for this turning operation has 6 strands, and the maximum accumulated value is 6). The above operation ensures that the cast strand to be turned can be accurately determined based on the accumulated value.

[0075] The following is an example with reference to the above steps S121 to S126:

[0076] When the control unit 202 is a PLC, the continuous casting machine 204 for this steel turning operation has 6 streams, and the preset interval time is 2S, then steps S122 and S123 will be implemented by the timer and accumulator in the PLC.

[0077] Specifically, the function block FC1 needs to be called in the OB1 organization block of the PLC program. The OB1 organization block is used to execute a specific program. The function block FC1 needs to be called directly or indirectly to execute. The timer T1 and the accumulator ADD are used in the function block FC1. The timer T1 generates an intermediate variable signal every 2 seconds. The signal is a high-level intermediate variable. The logic ladder diagram of this step can be as follows: Figure 5 shown.

[0078] After that, the variable will be used as the input of the accumulator ADD. When the accumulator ADD receives the intermediate variable signal, it will accumulate, that is, the accumulated value every 2 seconds will be accumulated from 1, 2, 3... in sequence. The logic ladder diagram of this step can be as follows: Figure 6 At the same time, the accumulator ADD will compare the accumulated value with the ID value corresponding to the most recently acquired casting strand. If the ID value corresponding to the most recently acquired casting strand is 3, the 3rd strand of the continuous casting machine 204 is determined as the casting strand to be turned. Since the continuous casting machine 204 has 6 strands at this time, when the accumulation module accumulates to 6, the accumulation module will be reset to zero and accumulate again according to the received intermediate variable signal. The logic ladder diagram of this step can be as follows: Figure 7 shown.

[0079] In some embodiments, the interval time is greater than or equal to 1S. This setting ensures that the interval time between each casting billet turning is not too short.

[0080] In some embodiments, the steel turning unit 203 includes an intermediate relay and a hydraulic component, and the intermediate relay is connected to the control unit 202 and the hydraulic component. The step of controlling the steel turning unit 203 at the casting stream to be turned over to perform the action of turning the cast billet can be achieved through S127.

[0081] S127, sending a command to allow steel turning to the intermediate relay, so that the coil of the intermediate relay is energized and drives the hydraulic component to work, thereby executing the action of turning the ingot.

[0082] The above steps realize the operation of flipping the ingot through the intermediate relay and hydraulic components.

[0083] In some embodiments, the hydraulic assembly includes a solenoid valve and a hydraulic cylinder, the intermediate relay is connected to the solenoid valve, and the solenoid valve is disposed on and connected to the hydraulic cylinder.

[0084] The solenoid valve is used to drive the hydraulic cylinder to work when the coil of the intermediate relay is energized.

[0085] The hydraulic cylinder is used to drive the steel turning assembly to turn over the ingot under the drive of the solenoid valve.

[0086] It should be noted that when the coil of the intermediate relay is energized, the open point of the intermediate relay is turned on, and the switch of the intermediate relay is closed to energize the solenoid valve. At this time, the hydraulic cylinder will work and drive the corresponding steel turning assembly to complete the operation of turning the cast billet. The steel turning assembly can be a mechanical structure that can perform steel turning operations.

[0087] In some embodiments, the intermediate relay is a 24VDC relay or a 220VAC relay. The intermediate relay can use a 24VDC relay to control the hydraulic cylinder, or a 220VAC relay to control the hydraulic cylinder.

[0088] On the basis of the above, an embodiment of the present invention also provides a steel turning system 200 for turning steel separately in a square billet continuous casting machine. The steel turning system 200 includes: a control unit 202, multiple detection units 201, multiple steel turning units 203 and a continuous casting machine 204, and the control unit 202 is connected to each of the detection units 201 and each of the steel turning units 203.

[0089] The control unit 202 is used to execute the control method for separately turning steel in a billet continuous casting machine as described in any one of the aforementioned embodiments.

[0090] Each of the detection units 201 is disposed on a roller table at the end of the continuous casting machine 204, and is used to detect the position of the cast billet and generate a signal indicating that the cast billet is in place.

[0091] Each of the steel turning units 203 is used to turn the cast billet.

[0092] The above arrangement prevents the hydraulic cylinders of the steel turning units 203 from operating simultaneously, ensuring that each hydraulic cylinder operates at the system pressure, thus ensuring normal steel turning operation.

[0093] In some embodiments, the control unit 202 is a PLC. For example, the PLC model may be Siemens S7-400PLC, and is set at the continuous casting machine 204 to act as a common PLC of the continuous casting machine 204, responsible for controlling the outlet equipment of each casting strand of the continuous casting machine 204, including the detection unit 201 detecting the arrival of the casting strand at the steel turning position, and the steel turning unit 203 controlling the steel turning action and other equipment.

[0094] Based on the above configuration, in some embodiments, a timer and an accumulator are provided in the PLC.

[0095] The timer is used to time according to a preset interval time and output an intermediate variable signal.

[0096] The accumulator is used to accumulate according to the intermediate variable signal and record the accumulated value.

[0097] The above settings combined with the timer and accumulator in the PLC prevent the steel turning units 203 at each casting strand from turning steel at the same time, ensuring that each steel turning unit 203 works at the system pressure and ensures normal steel turning action.

[0098] In several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0099] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for controlling the steel turning of a billet continuous casting machine, characterized in that: Applied to a control unit, the control unit is arranged on a continuous casting machine, the continuous casting machine is provided with a plurality of casting strands, each of the casting strands is marked with a corresponding ID value, and each of the casting strands is used for casting a casting billet, a detection unit is arranged on the end roller of each of the casting strands, and the detection unit is connected to the control unit, the method comprises: The control unit responds to the in-place signal of the casting strand sent by the detection unit of each casting strand, and issues an instruction to stop the roller table corresponding to the casting strand to the continuous casting machine; Determining the casting strand to be turned over according to preset rules, including: obtaining the ID value corresponding to each casting strand; timing according to a preset interval time, and outputting an intermediate variable signal; accumulating according to the intermediate variable signal and recording the accumulated value; comparing the accumulated value with the ID value corresponding to the casting strand obtained most recently, if the accumulated value is the same as the ID value corresponding to the casting strand, determining the casting strand as the casting strand to be turned over; When the casting strands other than the casting strand to be turned over continue to wait, the turning unit at the casting strand to be turned over is controlled to perform the action of turning over the cast strand.

2. The method for controlling the steel turning of a billet continuous casting machine according to claim 1, characterized in that: The method further comprises: Comparing the ID values ​​corresponding to the casting strands to determine the maximum ID value; The accumulated value is compared with the maximum ID value. If the accumulated value is the same as the maximum ID value, a reset operation is performed and accumulation is performed again according to the intermediate variable signal.

3. The method for controlling the steel turning of a billet continuous casting machine according to claim 1, characterized in that: The interval time is greater than or equal to 1S.

4. The method for controlling the separate steel turning of a billet continuous casting machine according to claim 1, characterized in that: The steel turning unit includes an intermediate relay and a hydraulic component, wherein the intermediate relay is connected to the control unit and the hydraulic component, and the steel turning unit at the casting strand to be turned over is controlled to perform the action of turning over the cast strand, including: An instruction allowing steel turning is sent to the intermediate relay, so that the coil of the intermediate relay is energized and drives the hydraulic component to work, thereby executing the action of turning the ingot.

5. The method for controlling the separate steel turning of a billet continuous casting machine according to claim 4, characterized in that: The hydraulic assembly includes a solenoid valve and a hydraulic cylinder, the intermediate relay is connected to the solenoid valve, and the solenoid valve is arranged on the hydraulic cylinder and connected to the hydraulic cylinder; The solenoid valve is used to drive the hydraulic cylinder to work when the coil of the intermediate relay is energized; The hydraulic cylinder is used to drive the steel turning assembly to turn over the ingot under the drive of the solenoid valve.

6. The method for controlling the separate steel turning of a billet continuous casting machine according to claim 4, characterized in that: The intermediate relay is a 24VDC relay or a 220VAC relay.

7. A billet continuous casting machine steel turning system, characterized in that: The steel turning system comprises: a control unit, a plurality of detection units, a plurality of steel turning units and a continuous casting machine, wherein the control unit is connected with each of the detection units and each of the steel turning units; The control unit is used to execute the control method for respectively turning steel in a billet continuous casting machine according to any one of claims 1 to 6; Each of the detection units is arranged on a roller table at the end of the continuous casting machine, and is used to detect the position of the cast billet and generate a signal that the cast billet is in place; Each of the steel turning units is used for turning the cast billet.

8. The steel turning system for a billet continuous casting machine according to claim 7, characterized in that: The control unit is a PLC.

9. The steel turning system for a billet continuous casting machine according to claim 8, characterized in that: The PLC is provided with a timer and an accumulator; The timer is used to time according to a preset interval time and output an intermediate variable signal; The accumulator is used to accumulate according to the intermediate variable signal and record the accumulated value.

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