Steel billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling

Abstract

The invention discloses a steel billet continuous casting flow number transfer system based on direct rolling between steel making and steel rolling, and relates to the technical field of steel billet rolling, and the steel billet continuous casting flow number transfer system based on direct rolling between steel making and steel rolling is characterized in that flow numbers are distributed to casting flows corresponding to cast steel billets; the method comprises the following steps: adjusting the processing and feedback of a steel billet through flow number identification, dynamically tracking and recording the whole-course information of the steel billet during rolling, tracking the length measurement of tail steel according to the flow number of a corresponding production casting flow, and feeding back and adjusting the casting weight adjustment of the casting flow to the billet, so as to ensure the stability of the sizing rate of steel rolling; and the weight of the next continuous casting steel billet is adjusted by combining the flow number and flow convection of the steel billet, so that the full sizing of the steel billet is realized, the steel cutting loss is reduced, the yield is improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to a steel billet continuous casting flow number transmission system, in particular to a steel billet continuous casting flow number transmission system based on direct rolling steelmaking and steel rolling. Background Art

[0002] In the production of rebar, in order to improve the sizing rate, reduce cutting loss and improve the yield rate, the weight of the rolled steel billet is calibrated. Although the existing technology has achieved sizing for steelmaking and continuous casting, it is still unable to effectively achieve calibrating the weight of the continuous casting of the steel billet due to process limitations.

[0003] The weight of the continuous casting billet is affected by factors such as the temperature of molten steel pouring, casting speed, liquid level of the tundish, steel passing through the crystallizer tube, and changes in cooling water volume, resulting in large differences in the weight of the billet. The process status of each continuous casting stream is inconsistent, and the weight of the continuous casting billet of each stream is also different. The existing technology only adjusts the weight of the entire stream of continuous casting billets by weighing, which has a large error and cannot accurately control the weight of the continuous casting billet. In the subsequent continuous casting process, the cutting loss is large, resulting in material waste.

[0004] To this end, technical personnel in this field proposed a billet continuous casting flow number transmission system based on direct rolling steelmaking and steel rolling, and designed a flow number transmission system to achieve full sizing through flow number transmission, which is beneficial to the tracking and quality control of the billet production process. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a billet continuous casting flow number transmission system based on direct rolling steelmaking and steel rolling, which realizes full-scale weighing of billet continuous casting through a complete flow number allocation and tracking transmission system.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a billet continuous casting stream number transmission system based on direct rolling steelmaking and steel rolling, comprising a stream number allocation module, a stream number transmission module, a tail steel measurement module, a weight adjustment and calculation module, a communication module and a PLC control system;

[0007] The flow number allocation module allocates corresponding flow numbers to the produced steel billets according to the casting strand, and the flow number transmission module detects the heat detection signal passing through a certain point on the production line, and assigns it to the designated steel billet running path according to the allocated flow number sequence, and transmits the flow number of the steel billet on the corresponding production line accordingly;

[0008] The tail steel measuring module performs infrared measurement on the length of the last section of steel after the shearing process is completed, records the tail steel length information in the flow number of the corresponding steel billet, and transmits it to the subsequent process synchronously;

[0009] The weight adjustment and calculation module calculates the weight of the billet that needs to be adjusted according to the length information of the tail steel, and feeds it back to the casting strand through the PLC control system for casting adjustment;

[0010] The communication module is responsible for the orderly transmission and control of signals between each functional module and the PLC control system.

[0011] Preferably, the specific implementation steps are:

[0012] Flow number allocation: flow numbers are allocated to the steel billets on the production line according to the heat detection signals of the casting strand and the flow number transmission module, and flow numbers are allocated to the steel billets on the production line according to the heat detection signals of the heat detection elements installed at the independent discharge channels of the solidified steel billets of different casting strands, corresponding to the corresponding heat detection element numbers, and the flow number information is allocated to the corresponding production line for transmission and recording of the flow number information;

[0013] Flow number detection and transmission: heat detection elements are installed at the billet outlet of each flow of the steelmaking continuous casting cold bed, and the flow number is recorded according to the signal of the heat detection element corresponding to the steelmaking casting flow. The heat detection signal detected on the production line is assigned to the production line and the flow number is transmitted in the order of flow numbers according to the billet discharge order. The corresponding information is controlled to be recorded, transmitted and saved through the PLC control system. The heat detection elements installed at the entrance of the direct rolling roller, the first rolling mill and the last rolling mill are used to roll the billet according to the corresponding flow number of the billet, so as to realize the orderly transmission of the flow number on the production line;

[0014] Shearing control and adjustment: The PLC control system sends the corresponding flow number of the billet after the last stand rolling mill and the adjusted weight information of the billet to the steelmaking continuous casting shearing machine through TCP / IP network communication. The weight adjustment and calculation module converts the adjusted weight into the adjusted length according to the billet flow number. The steelmaking continuous casting shearing machine adjusts the shearing length according to the billet flow number to obtain the tail steel. The tail steel length measuring unit is arranged at the steelmaking continuous casting shearing machine to directly measure the length of the tail steel.

[0015] Tail steel length measurement: The tail steel measurement module measures the length of the cut tail steel on the production line, and transmits the tail steel length information to the PLC control system through TCP / IP network communication for corresponding recording. The PLC control system calculates the billet weight that needs to be adjusted for the casting strand based on the set tail steel length and the actual measured tail steel length, and transmits the recorded information to the PLC control system;

[0016] Re-inspection and feedback: The continuous casting billet after adjustment and shearing is re-inspected for length and flow number until the length of the tail steel produced by the production line reaches the set length to ensure the precise weight of the billet casting. According to the billet flow number assigned by the flow number allocation module, the corresponding tail steel measurement module's measurement data is compared with the weight adjustment and calculation module's calculation data feedback corresponding casting stream, and the casting weight of the casting stream is adjusted accordingly.

[0017] Preferably, the process of detecting and transmitting the flow number:

[0018] A hot metal detection element is installed at the entrance of the straight rolling roller table to record the passing of the steel billet according to the thermal energy reaction, and the flow number is recorded in combination with the detection signal of the hot metal detection element installed at the casting flow outlet;

[0019] The detection signal is connected to the PLC control system. When the billet moves to the direct rolling roller entrance for thermal inspection, the PLC control system detects a steel signal and transmits the recorded billet flow number sequence to the direct rolling roller accordingly.

[0020] A hot metal detection element is installed in front of the first rolling mill for detection, and the detection signal is connected to the PLC control system. When the billet moves to the first rolling mill for hot detection, the PLC control system detects a steel signal and writes the flow number detected at the entrance of the direct rolling roller into the data block of the PLC control system;

[0021] By analogy, until the billet reaches the last rolling mill, the PLC control system transmits the flow number to the last rolling mill by detecting the current signal of the rolling mill. After the steel is thrown, the billet becomes threaded steel, and the corresponding flow number and billet are transmitted to the finished steel in batches.

[0022] Preferably, the calculation formula of the steel billet weight is: (set length - actual tail steel length) * rolling specification (meter weight) = adjusted weight (kg).

[0023] Preferably, in the re-inspection and feedback process, if the difference between the actual tail steel length and the set length is less than 50 mm, the adjustment is completed; if the tail steel length does not reach the set length, the production of the next batch of steel billets is continued, and the calculation and feedback adjustment of the next batch of steel billets are performed until the obtained tail steel length reaches the set length range.

[0024] The present invention discloses a billet continuous casting flow number transmission system based on direct rolling steelmaking and steel rolling, which has the following beneficial effects:

[0025] 1. The billet continuous casting flow number transmission system based on direct rolling steelmaking and steel rolling, by assigning flow numbers to the casting strands corresponding to the casting billets, adjusting the processing and feedback of the billets through flow number identification, dynamically tracking and recording the whole process information of the billets during rolling, tracking the tail steel length measurement of the flow number of the corresponding production casting strand, feedback adjusting the casting weight of the billet to ensure the stability of the fixed length rate of steel rolling, by measuring the tail steel length of the rolling billet, comparing the difference with the set tail steel length, converting it into weight, and combining the flow number of the billet, the flow convection adjusts the weight of the next continuous casting billet to achieve full fixed length of the billet, reduce steel cutting loss, improve the yield rate, and reduce production costs.

[0026] 2. The billet continuous casting stream number transmission system between direct rolling steelmaking and steel rolling is a feedback adjustment for the casting stream, which is highly targeted and avoids the problem of inconsistent billet weights of each stream due to different process factors such as the pulling speed of each casting stream in steelmaking. The casting weight of the casting stream is adjusted directly through the subsequent processing monitoring feedback of the billet. It has a fast response speed and can immediately adjust the billet weight to the fixed weight requirement, and the tail steel length can quickly meet the set requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the flow number transmission process of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The embodiment of the present invention discloses a billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling;

[0031] It includes flow number allocation module, flow number transmission module, tail steel measurement module, weight adjustment and calculation module, communication module and PLC control system;

[0032] The flow number allocation module allocates corresponding flow numbers to the produced steel billets according to the casting strand, and the flow number transmission module detects the heat detection signal passing through a certain point on the production line, and assigns it to the designated steel billet running path according to the allocated flow number sequence, and transmits the flow number of the steel billet on the corresponding production line accordingly;

[0033] The tail steel measuring module performs infrared measurement on the length of the last section of steel after the shearing process is completed, records the tail steel length information in the flow number of the corresponding steel billet, and transmits it to the subsequent process synchronously;

[0034] The weight adjustment and calculation module calculates the weight of the billet that needs to be adjusted according to the length information of the tail steel, and feeds it back to the casting strand through the PLC control system for casting adjustment;

[0035] The communication module is responsible for the orderly transmission and control of signals between each functional module and the PLC control system.

[0036] Preferably, the specific implementation steps are:

[0037] Flow number allocation: flow numbers are allocated to the steel billets on the production line according to the heat detection signals of the casting strand and the flow number transmission module, and flow numbers are allocated to the steel billets on the production line according to the heat detection signals of the heat detection elements installed at the independent discharge channels of the solidified steel billets of different casting strands, corresponding to the corresponding heat detection element numbers, and the flow number information is allocated to the corresponding production line for transmission and recording of the flow number information;

[0038] Flow number detection and transmission: heat detection elements are installed at the billet outlet of each flow of the steelmaking continuous casting cold bed, and the flow number is recorded according to the signal of the heat detection element corresponding to the steelmaking casting flow. The heat detection signal detected on the production line is assigned to the production line and the flow number is transmitted in the order of flow numbers according to the billet discharge order. The corresponding information is controlled to be recorded, transmitted and saved through the PLC control system. The heat detection elements installed at the entrance of the direct rolling roller, the first rolling mill and the last rolling mill are used to roll the billet according to the corresponding flow number of the billet, so as to realize the orderly transmission of the flow number on the production line;

[0039] Shearing control and adjustment: The PLC control system sends the corresponding flow number of the billet after the last stand rolling mill and the adjusted weight information of the billet to the steelmaking continuous casting shearing machine through TCP / IP network communication. The weight adjustment and calculation module converts the adjusted weight into the adjusted length according to the billet flow number. The steelmaking continuous casting shearing machine adjusts the shearing length according to the billet flow number to obtain the tail steel. The tail steel length measuring unit is arranged at the steelmaking continuous casting shearing machine to directly measure the length of the tail steel.

[0040] Tail steel length measurement: The tail steel measurement module measures the length of the cut tail steel on the production line, and transmits the tail steel length information to the PLC control system through TCP / IP network communication for corresponding recording. The PLC control system calculates the billet weight that needs to be adjusted for the casting strand based on the set tail steel length and the actual measured tail steel length, and transmits the recorded information to the PLC control system;

[0041] Re-inspection and feedback: The continuous casting billet after adjustment and shearing is re-inspected for length and flow number until the length of the tail steel produced by the production line reaches the set length to ensure the precise weight of the billet casting. According to the billet flow number assigned by the flow number allocation module, the corresponding tail steel measurement module's measurement data is compared with the weight adjustment and calculation module's calculation data feedback corresponding casting stream, and the casting weight of the casting stream is adjusted accordingly.

[0042] Preferably, the process of detecting and transmitting the flow number:

[0043] A hot metal detection element is installed at the entrance of the straight rolling roller table to record the passing of the steel billet according to the thermal energy reaction, and the flow number is recorded in combination with the detection signal of the hot metal detection element installed at the casting flow outlet;

[0044] The detection signal is connected to the PLC control system. When the billet moves to the direct rolling roller entrance for thermal inspection, the PLC control system detects a steel signal and transmits the recorded billet flow number sequence to the direct rolling roller accordingly.

[0045] A hot metal detection element is installed in front of the first rolling mill for detection, and the detection signal is connected to the PLC control system. When the billet moves to the first rolling mill for hot detection, the PLC control system detects a steel signal and writes the flow number detected at the entrance of the direct rolling roller into the data block of the PLC control system;

[0046] By analogy, until the billet reaches the last rolling mill, the PLC control system transmits the flow number to the last rolling mill by detecting the current signal of the rolling mill. After the steel is thrown, the billet becomes threaded steel, and the corresponding flow number and billet are transmitted to the finished steel in batches.

[0047] Preferably, the calculation formula of the steel billet weight is: (set length - actual tail steel length) * rolling specification (meter weight) = adjusted weight (kg).

[0048] Preferably, in the re-inspection and feedback process, if the difference between the actual tail steel length and the set length is less than 50 mm, the adjustment is completed; if the tail steel length does not reach the set length, the production of the next batch of steel billets is continued, and the calculation and feedback adjustment of the next batch of steel billets are performed until the obtained tail steel length reaches the set length range.

[0049] Example 1

[0050] Install a heat detection element at the outlet of the casting strand billet, and perform heat detection on multiple casting strands in the order of 1 2

[0051] The billets are numbered in sequence of 3 4..., and the billets on the production line are assigned stream numbers according to the billet heat detection signals output by the casting strand.

[0052] It takes about 35-38 seconds for existing equipment to roll a steel billet, and the time interval for conveying a continuous casting billet during steelmaking is also set to 35-38 seconds. Therefore, the time interval between continuous heat detection signals and continuous rolling mill current signals for the movement of the steel billet is much less than 35 seconds, ensuring that the speed of flow number transmission is faster than the billet transportation. When the steel billet moves to the processing position, the processing information can be reflected in time, and the corresponding billet information can be recorded under the flow number.

[0053] Add 8 DB data blocks in the direct rolling PLC system, named as continuous casting billet detection and flow number allocation data, direct rolling roller trigger data, 1# rolling mill heat inspection data, 3# rolling mill heat inspection data, 8# rolling mill heat inspection data, 18# rolling mill heat inspection data, and finished steel warehousing data.

[0054] Set 4 data in each DB block, corresponding to the fixed length, head temperature, flow number and furnace number of the blank;

[0055] Hot metal detection elements are installed at each flow casting slab walking position of the steelmaking cooling bed, and the heat detection signal is connected to the direct rolling PLC system. The direct rolling PLC system is easily available in the prior art and can be purchased from the market according to usage needs.

[0056] When N streams of billets transported from the steelmaking plant pass through the Nth hot metal detection element, the direct rolling PLC system detects a signal and generates a sequential stream number for the billet N in the system. The stream number is allocated and transmitted according to the triggering sequence of subsequent processes.

[0057] At the same time, the existing control system of steelmaking and continuous casting communicates with the direct rolling PLC system through the TCP / IP network. The direct rolling PLC system writes the flow number N and the fixed length, head temperature, and furnace number into the four data corresponding to the continuous casting billet detection data of the DB block, and transmits the fixed length, head temperature, and furnace number information corresponding to the N-stream billet to the direct rolling PLC system and records it after the flow number of the corresponding billet.

[0058] The steel billets continue to be transported on the production line and the flow numbers are transferred at the same time.

[0059] When the billet passes through the entrance of the direct rolling roller, the direct rolling PLC system detects the billet signal through the hot metal detection element, obtains the billet flow number from the PLC control system in sequence, and records the billet data after the flow number accordingly.

[0060] The hot metal detection element is installed on the front roller of the 1# rolling mill. When the steel billet passes through the hot metal detection element, the direct rolling PLC system detects the signal, inherits the flow number information of the steel billet from the previous process, and realizes the transmission of the flow number in the 1# rolling mill.

[0061] The billet is sequentially bitten into the 1# rolling mill, 3# rolling mill, 8# rolling mill and 18# rolling mill (last stand rolling mill). After the direct rolling PLC system detects the biting current signal, it writes the data stream number N, fixed length, head temperature and furnace number of the previous signal transmission point into the DB block - 18# rolling mill data block, and the stream number is transmitted to the 18# rolling mill, and the billet continues to be rolled.

[0062] The 18# rolling mill rolls steel, and the billet becomes finished steel. The PLC system detects that the 18# current signal disappears, and writes the 4 data stream numbers N, fixed length, head temperature, and furnace number of the previous signal transmission point into the finished steel data block, completing the complete stream number transmission of the billet production.

[0063] When the 18# rolling mill finishes throwing steel, the tail steel length measurement data is updated, and then the direct rolling PLC system saves the four data blocks of the finished steel data block, including the flow number N, fixed length, head temperature, furnace number and measured tail steel length. The data is synchronously displayed on the HMI screen for direct observation.

[0064] The straight-casting PLC system will receive the tail steel length and calculate the billet weight that needs to be adjusted for the corresponding casting strand according to the calculation formula: (tail steel length - set length) * standard (m / g) = adjustment weight (g).

[0065] The data recorded by the PLC control system is fed back to the casting strand through TCP / IP communication. The casting strand is adjusted to adjust the casting weight of the steel billet according to the feedback information, thereby adapting to the differences in subsequent processes such as stretching of the casting strand, and adjusting the steel billet shearing data of the strand at the same time.

[0066] Assuming that the steelmaking continuous casting is a 6-machine 6-strand continuous casting machine, 6 strands of steel billets can be produced simultaneously, but during the conveying process, they can only be conveyed one at a time according to the discharge order. For this reason, 6 hot metal detection elements can be installed on the cooling bed for conveying steelmaking billets to detect the strand number of the conveyed billets.

[0067] The billet continuous casting flow number transmission system based on direct rolling steelmaking and steel rolling allocates flow numbers to the casting strands corresponding to the cast billets, adjusts the processing and feedback of the billets through flow number identification, dynamically tracks and records the entire information of the billets during rolling, tracks the tail steel length measurement of the flow number of the corresponding production casting strand, and feedback-adjusts the casting weight of the billet by the casting strand to ensure the stability of the sizing rate of steel rolling. By measuring the tail steel length of the rolled billet, comparing the difference with the set tail steel length, converting it into weight, and combining the flow number of the billet, the weight of the next continuously cast billet is adjusted through flow convection to achieve full sizing of the billet, reduce steel cutting loss, improve the yield rate, and reduce production costs.

[0068] Furthermore, the transmission of the stream number is a feedback adjustment for the casting strand, which is highly targeted and can avoid the problem of inconsistent weight of each stream of steel billets due to different process factors such as the pulling speed of each casting strand in steelmaking. The casting weight of the casting strand is directly adjusted through the subsequent monitoring and feedback of the processing of the steel billet. It has a fast response speed and can immediately adjust the weight of the steel billet to the fixed weight requirement, and the tail steel length can quickly meet the set requirements.

[0069] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling, characterized by: It includes a flow number allocation module, a flow number transmission module, a tail steel measurement module, a weight adjustment and calculation module, a communication module and a PLC control system. The flow number allocation module allocates corresponding flow numbers to the output billets according to the casting flow, the flow number transmission module detects the production line heat detection signal and compares the allocated flow number sequence, the tail steel measurement module measures the length of the last section of rolled steel, the weight adjustment and calculation module calculates the billet weight that needs to be adjusted according to the tail steel length, and the communication module is responsible for the orderly transmission and control of signals between each functional module and the PLC control system.

2. The billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling according to claim 1, characterized in that: Follow the steps below to implement it: Stream number allocation: Stream numbers are allocated to the steel billets on the production line according to the casting stream and the heat detection signals of the stream number transmission module; Flow number detection and transmission: heat detection elements are installed at the billet outlets of each flow of the steelmaking continuous casting cooling bed, and the heat detection signals detected on the production line are distributed to subsequent processes according to the flow number sequence of the flow number distribution module, and the corresponding information is saved in the PLC control system; Shearing control and adjustment: The PLC control system sends the corresponding flow number of the billet after the last stand rolling mill and the adjusted weight information of the billet to the steelmaking continuous casting shearing machine through TCP / IP network communication, and the weight adjustment and calculation module converts the adjusted weight into the adjusted length, and the steelmaking continuous casting shearing machine shears the billet; Tail steel length measurement: The tail steel measurement module measures the cut tail steel on the production line and transmits the tail steel length information to the PLC control system through TCP / IP network communication. The PLC control system calculates the billet weight that needs to be adjusted based on the set tail steel length and the actual measured tail steel length; Re-inspection and feedback: After adjustment and shearing, the continuous casting billet is re-inspected for length and flow number until the tail steel length produced by the production line reaches the set length.

3. The billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling according to claim 2, characterized in that: The flow number allocation process allocates flow numbers to the steel billets on the production line according to the heat detection signals of heat detection elements installed at independent discharge channels of different casting strands and solidified steel billets, corresponding to the corresponding heat detection element numbers.

4. The billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling according to claim 2, characterized in that: In the process of flow number detection and transfer, the heat detection elements installed at the entrance of the direct rolling roller, the first rolling mill and the last rolling mill roll the steel billets according to the order of flow number allocation of the steel billets, so as to realize flow number detection and orderly transfer on the production line.

5. The billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling according to claim 2, characterized in that: In the shearing control and adjustment process, the steelmaking continuous casting shearing machine adjusts the shearing length of the steel billet according to the casting flow to obtain multiple sections of steel billets. The tail steel length measuring unit is arranged at the steelmaking continuous casting shearing machine to directly measure the length of the end steel billet.

6. The billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling according to claim 2, characterized in that: In the tail steel length measurement process, the tail steel measuring module measures the length of the cut tail steel, records it according to the flow number of the steel billet, and transmits the recorded information to the PLC control system.

7. The billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling according to claim 2, characterized in that: In the re-inspection and feedback process, according to the billet flow number assigned by the flow number allocation module, the corresponding casting flow is fed back according to the measurement data of the tail steel measurement module, and the calculation data of the weight adjustment and calculation module is compared, and the casting adjustment of the casting flow is performed accordingly.

8. The billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling according to claim 2, characterized in that: The detection and transmission process of the flow number: A hot metal detection element is installed at the entrance of the straight rolling roller table to detect the passing steel billet according to the thermal energy reaction, and the casting strand is recorded according to the detection signal of the hot metal detection element installed at the casting strand outlet; The detection signal is connected to the PLC control system. When the billet moves to the direct rolling roller entrance for thermal inspection, the PLC control system detects a steel signal and transmits the assigned flow number to the direct rolling roller in sequence; A hot metal detection element is installed in front of the first rolling mill for detection, and the detection signal is connected to the PLC control system. When the steel billet moves to the first rolling mill for hot detection, the PLC control system detects a steel signal, writes the flow number detected at the entrance of the direct rolling roller into the data block of the PLC control system, and the flow number is transmitted to the first rolling mill; And so on, until the billet reaches the last rolling mill, the PLC control system transmits the flow number to the last rolling mill by detecting the current signal of the rolling mill. After the billet is cast, it becomes threaded steel and the flow number is transmitted to the finished steel.

9. The billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling according to claim 2, characterized in that: The calculation formula of the billet weight is: (set length - actual tail steel length) * rolling specification (meter weight) = adjusted weight (kg).

10. The billet continuous casting flow number transmission system between direct rolling steelmaking and steel rolling according to claim 2, characterized in that: In the re-inspection and feedback process, if the difference between the actual tail steel length and the set length is less than ±50cm and the adjustment weight is 0, the adjustment is completed. If the tail steel length does not reach the set length, the calculation and adjustment of the next batch of steel billets will continue until the obtained tail steel length reaches the set length range.

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