Heat treatment machine group steel plate into the furnace control method and system and steel plate heat treatment production line

Abstract

The application discloses a kind of heat treatment unit steel plate furnace entry control method, system and steel plate heat treatment production line, the heat treatment unit steel plate furnace exit control method, comprising the following steps: obtaining the signal of furnace entry steel plate detection element;When furnace entry steel plate detection element detects steel signal, find whether there is steel plate to satisfy first condition: the tail position-A of steel plate ≤ the position of furnace entry steel plate detection element ≤ the head position+A of steel plate, A is the set allowable deviation value;If find there is steel plate to satisfy first condition, then exit find, start furnace entry procedure;If there is no steel plate to satisfy first condition, then alarm prompt exception, stop furnace entry.The present application can prevent unknown steel plate furnace entry, and very effectively prevent red steel furnace exit, greatly improve production efficiency, enable unit more safe and stable simultaneously.

Description

Technical Field

[0001] This invention belongs to the field of heat treatment control technology, specifically relating to a method, system and production line for controlling the entry of steel plates into a heat treatment unit. Background Technology

[0002] In heat treatment processes, it's possible for unknown steel plates to enter and exit the furnace. The steel plates need to be fed into the quenching furnace at a specific speed. The quenching furnace operates at high temperatures, typically around 900 degrees Celsius. Therefore, the steel plates are red-hot from the furnace inlet to the outlet. When the plates exit the furnace, the subsequent quenching machine sprays water to quench them. Because the furnace rollers are constantly inside the furnace, they must rotate continuously to maintain their shape. However, the quenching machine may fail to spray water for various reasons. If these factors are not properly controlled, red-hot steel can easily emerge, resulting in substandard products and endangering equipment and personnel safety, causing equipment damage and personal injury – with extremely serious consequences.

[0003] In the heat treatment process, the steel plate needs to be shot blasted first, and then fed into the quenching furnace according to the process speed. The temperature of the quenching furnace is relatively high, generally around 900 degrees Celsius. Therefore, the steel plate is in a red-hot state from the furnace inlet to the furnace outlet. When the steel plate comes out of the furnace, the subsequent quenching machine needs to spray water to quench the steel plate.

[0004] When steel plates leave the shot blasting machine, they are very likely to be covered with shot. Therefore, a blower is added to the outlet to blow the shot off.

[0005] When steel plates are fed into the furnace, they can draw air into the furnace, affecting the atmosphere inside and thus the quality of the products and the service life of the furnace. Therefore, a blowing device is added to the inlet to prevent excessive air from entering the furnace.

[0006] When steel plates leave the quenching machine, they are very likely to be covered with water droplets, so a spraying device is added to its outlet to blow the water droplets off.

[0007] Traditional jet blowing devices are controlled by continuously blowing air, which wastes compressed air and energy. Summary of the Invention

[0008] The purpose of this invention is to overcome at least one defect in the prior art and to provide a method, system and production line for controlling the entry of steel plates into the furnace of a heat treatment unit.

[0009] The technical solution of this invention is implemented as follows: This invention discloses a method for controlling the entry of steel plates into a heat treatment unit, comprising the following steps:

[0010] Acquire signals from the furnace-entering steel plate detection element;

[0011] When the steel plate detection element detects the presence of steel, it checks whether there is a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the steel plate detection element ≤ the head position of the steel plate + A, where A is the set allowable deviation value.

[0012] If a steel plate that meets the first condition is found, the search is exited and the furnace feeding procedure is started.

[0013] If no steel plate that meets the first condition is found, an alarm will be triggered to indicate an abnormality, and the furnace feeding will be stopped.

[0014] Furthermore, the steel plate detection element is arranged in front of the furnace inlet.

[0015] Furthermore, there are multiple detection elements for the steel plates entering the furnace, and these multiple detection elements are distributed at intervals along the running direction of the steel plates.

[0016] Furthermore, when the steel plate detection element detects the presence of steel, it checks whether there is a steel plate that meets the first condition. Specifically, this includes comparing the position information of the steel plate detection element with the position information of each steel plate to check whether there is a steel plate that meets the first condition.

[0017] Furthermore, the position information of the steel plate detection element is compared with the position information of each steel plate. Specifically, this includes comparing the position information of the steel plate detection element with the position information of each steel plate in the order in which the steel plates are put into the furnace.

[0018] Furthermore, if no steel plate that meets the first condition is found, an abnormal situation is confirmed. If the steel plate position is abnormal, the steel plate position is corrected. If the steel plate signal is lost, a new steel plate signal is inserted. If the furnace-entry steel plate detection element is abnormal, the detection signal of the furnace-entry steel plate detection element is processed.

[0019] Furthermore, after finding a steel plate that meets the first condition, it is necessary to determine whether the distance between the last steel plate in the furnace and the furnace inlet is sufficient for the steel plate to enter the furnace at high speed and then decelerate to the process speed. If it is sufficient, the furnace entry procedure for the steel plate is started.

[0020] The present invention also discloses a heat treatment unit steel plate feeding control system, including a controller, wherein the controller is provided with a heat treatment unit steel plate feeding control program, and the heat treatment unit steel plate feeding control program is configured to implement the heat treatment unit steel plate feeding control method as described above.

[0021] Furthermore, the heat treatment unit steel plate feeding control system of the present invention also includes a steel plate feeding detection element, which is connected to the controller and is used to transmit the detected information to the controller.

[0022] Furthermore, the detection element for the steel plates entering the furnace is a grating.

[0023] The present invention also discloses a steel plate heat treatment production line, including a heating furnace, a controller, and a steel plate detection element for entering the furnace. The steel plate detection element is used to transmit the detected information to the controller. The controller is equipped with a heat treatment unit steel plate entering furnace control program, which is configured to implement the heat treatment unit steel plate entering furnace control method as described above.

[0024] The present invention has at least the following beneficial effects: The present invention arranges a steel plate detection element in front of the furnace inlet; when the steel plate detection element detects the presence of steel, it checks whether there is a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the steel plate detection element ≤ the head position of the steel plate + A, where A is a set allowable deviation value; if a steel plate that meets the first condition is found, the search is exited and the furnace feeding procedure is started; if no steel plate that meets the first condition is found, an alarm is triggered to indicate an abnormality and the furnace feeding is stopped.

[0025] By adopting the above-mentioned solution of the present invention, it is possible to prevent unknown steel plates from entering the furnace and to effectively prevent abnormal steel plates from exiting the furnace, thereby improving the production efficiency, safety and stability of the unit. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram showing the arrangement of the steel plate detection elements provided in an embodiment of the present invention;

[0028] Figure 2 A flowchart illustrating the furnace loading control method for steel plates in a heat treatment unit, as provided in an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram showing the arrangement of various blowing devices provided in the embodiments of the present invention;

[0030] Figure 4 A flowchart illustrating the control method of the heat treatment unit injection device provided in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the position coordinates of a heat treatment unit provided in one embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of a steel plate being fed into a furnace according to one embodiment of the present invention. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this invention, unless otherwise stated, "a plurality of" or "several" means two or more.

[0036] Example 1

[0037] See Figure 1 and Figure 2 This invention provides a method for controlling the feeding of steel plates into a heat treatment unit, comprising the following steps:

[0038] Acquire signals from the furnace-entering steel plate detection element;

[0039] When the steel plate detection element detects the presence of steel, it checks whether there is a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the steel plate detection element ≤ the head position of the steel plate + A, where A is the set allowable deviation value.

[0040] If a steel plate that meets the first condition is found, a normal signal is returned (indicating that the signal of the detection element for the steel plate entering the furnace is normal), the search is exited, and the furnace entry procedure is started.

[0041] If no steel plate that meets the first condition is found, an abnormal signal is returned, an alarm is triggered to indicate an abnormality, and the furnace feeding is stopped.

[0042] Furthermore, when the steel plate detection element detects the presence of steel, it performs signal processing, typically with a delay of a set time (e.g., 1 second).

[0043] The position information of each steel plate (the head and tail positions of the steel plate) is calculated by the program. For example, the initial position of each steel plate is known, and its position at the corresponding time is obtained by integrating the velocity and time. Of course, this position is theoretical and can be corrected by using a grating.

[0044] The steel plate detection element is located before the furnace inlet. The steel plate detection element is used to detect the steel plates on the furnace feed roller conveyor.

[0045] In some embodiments, there are multiple steel plate detection elements for the furnace feed, which are distributed at intervals along the direction in which the steel plates enter the furnace. The spacing between adjacent steel plate detection elements is set as needed. In some embodiments, the distance between the steel plate detection element and the furnace inlet is generally less than 1 meter, such as when the steel plate detection element is generally located within 1 meter of the furnace inlet.

[0046] In some embodiments, the steel plate detection element employs a grating (through-beam grating).

[0047] In some embodiments, when the steel plate detection element detects a steel signal, it checks whether there is a steel plate that meets the first condition. Specifically, this includes: when the steel plate detection element detects a steel signal, comparing the position information of the steel plate detection element with the position information of each steel plate (which may be the first steel plate to the last steel plate j on the furnace roller conveyor, or information on all steel plates that have not yet entered the furnace, etc.) to check whether there is a steel plate that meets the first condition.

[0048] The position information of the steel plate detection element entering the furnace is compared with the position information of each steel plate. Specifically, the position information of the steel plate detection element is compared with the position information of each steel plate in turn, according to the order in which the steel plates enter the furnace.

[0049] In some embodiments, if no steel plate that meets the first condition is found, an abnormal situation is confirmed. If the steel plate position is abnormal, the steel plate position is corrected. If the steel plate signal is lost, a new steel plate signal is inserted. If the furnace-entry steel plate detection element is abnormal, the detection signal of the furnace-entry steel plate detection element is processed.

[0050] There may be interference, so the detection signal of the steel plate detection element needs to be processed, specifically including: delay processing of the detection signal of the steel plate detection element.

[0051] When determining whether the steel plate position is normal, if the calculated steel plate position is X1 (e.g., 28000mm), but the grating at position X2 (e.g., 29800mm) is lit, it indicates that the steel plate position calculation is incorrect, and therefore the steel plate position is abnormal.

[0052] The position of the steel plate is corrected. One embodiment is as follows: if the correction range is within a set range (e.g., 2m), then the correction is made. For example, 29800-28000=1800mm, which is within 2m, then the position of the steel plate will be corrected to X2 (e.g., 29800mm).

[0053] In some embodiments, if there is no signal from the steel plate but the grating is lit, it indicates that the signal from the steel plate has been lost.

[0054] In some embodiments, inserting a new steel plate signal specifically includes: inputting the current position, length, thickness, and other signals of the steel plate onto the HMI, and after confirmation, adding a steel plate to the HMI. For example, if there are two steel plates on the HMI, and the operator wants to insert information for a steel plate (in reality, there must be three), the operator needs to input the current position, length, thickness, and other signals of the steel plate onto the HMI, and after confirmation, adding a steel plate to the HMI.

[0055] Further, see Figure 6 After finding a steel plate that meets the first condition, it is also necessary to determine whether the distance S between the last steel plate in the furnace (i.e., the steel plate that was previously put into the furnace) and the furnace inlet meets the requirement that the steel plate enters the furnace at high speed and then decelerates to the process speed V. 工艺 If the required distance is met, the furnace loading procedure for the steel plate will be initiated.

[0056] For example, S in one embodiment needs to satisfy the following condition:

[0057]

[0058] Among them, V 入 For the rate at which the steel plate enters the furnace, l 入 This indicates the length of the steel plate currently being prepared to enter the furnace. s0 is the safety interval, which is set as needed, generally 1m-2m.

[0059] Based on the same inventive concept, the present invention also discloses a heat treatment unit steel plate furnace feeding control device, comprising: a memory, a processor, and a heat treatment unit steel plate furnace feeding control program stored in the memory and executable on the processor, wherein the heat treatment unit steel plate furnace feeding control program is configured to implement the heat treatment unit steel plate furnace feeding control method as described above.

[0060] In some embodiments, the processor may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip. The processor is typically used to control the overall operation of the electronic device. In this embodiment, the processor is used to run program code stored in the memory or process data, such as program code for a steel plate furnace feeding control method in a heat treatment unit.

[0061] Based on the same inventive concept, the present invention also discloses a storage medium storing a heat treatment unit steel plate furnace feeding control program, which is used to enable the processor to implement the heat treatment unit steel plate furnace feeding control method as described above when executed.

[0062] The memory includes at least one type of readable storage medium, including flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, disk, optical disk, etc. In some embodiments, the memory may be an internal storage unit of the electronic device, such as the hard disk or RAM of the electronic device. In other embodiments, the memory may also be an external storage device of the electronic device, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. Of course, the memory may include both internal and external storage units of the electronic device. In this embodiment, the memory is typically used to store operating methods and various application software installed on the electronic device, such as program code for the steel plate furnace feeding control method of a heat treatment unit. Furthermore, the memory can also be used to temporarily store various types of data that have been output or will be output.

[0063] The process described above will be explained in detail below with specific examples.

[0064] At the furnace inlet, gratings 1 to 3 are arranged sequentially, a total of 3 gratings, located before entering the furnace. Of course, the arrangement of gratings before entering the furnace is not limited to 3 gratings; it can also be 1 grating, 2 gratings, or 4 gratings, etc. 3 gratings are preferred.

[0065] When the grating detects the presence of steel, it compares the signal with the position information of the steel plate. If the grating is within the steel plate's position area, it is considered normal and the furnace is loaded normally; otherwise, the program outputs an abnormal steel plate position signal and sends a signal to the operator to stop loading into the furnace.

[0066] To prevent unknown steel plates from entering the furnace: Specifically, the grating signal is processed, typically with a 1-second delay; the steel plate is located at this position, and a loop is executed to find a steel plate that meets the following conditions: if the tail position of the steel plate -1000 < the phototube position < the head position of the steel plate +1000, and a steel plate that meets this condition is found, it means that the grating signal is normal, and the normal furnace entry procedure is performed; otherwise, an alarm is triggered: the steel plate signal or grating signal may be abnormal, and the furnace entry is stopped.

[0067] Example 2

[0068] See Figure 1 and Figure 2 The present invention also discloses a method for controlling the tapping of steel plates from a heat treatment unit, comprising the following steps:

[0069] Acquire signals from the detection elements of the steel plates coming out of the furnace;

[0070] When the steel plate detection element detects the presence of steel, it checks whether there is a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the steel plate detection element ≤ the head position of the steel plate + A, where A is the set allowable deviation value.

[0071] If a steel plate that meets the first condition is found, the search is exited, a normal signal is returned (indicating that the signal of the steel plate detection element is normal), and the furnace exit program is started;

[0072] If no steel plate that meets the first condition is found, an abnormal signal is returned, and an alarm is triggered to indicate the abnormality, such as the location of the steel plate or an abnormality in the steel plate detection element, and the furnace is stopped.

[0073] Furthermore, after acquiring the steel presence signal detected by the steel plate detection element, signal processing is performed, and then it is checked whether there is a steel plate that meets the first condition. The signal processing is generally a delay of a set time (e.g., 1 second).

[0074] The position information of each steel plate (the head and tail positions of the steel plate) is calculated by the program. For example, the initial position of each steel plate is known, and its position at the corresponding time is obtained by integrating the velocity and time. Of course, this position is theoretical and can be corrected by using a grating.

[0075] Furthermore, the steel plate detection element is arranged before the furnace outlet and close to the furnace outlet.

[0076] Furthermore, the detection element for the steel plates exiting the furnace is a (through-beam grating).

[0077] In some embodiments, the distance between the steel plate detection element and the furnace outlet is set as needed, generally 1 to 3 meters, but not less than 1 meter, that is, the steel plate detection element is located 1 to 3 meters in front of the furnace outlet, but not less than 1 meter. In some embodiments, A is generally 1 to 1.5 meters.

[0078] In some embodiments, there are multiple steel plate detection elements, which are distributed at intervals along the steel plate exiting the furnace. The spacing between adjacent steel plate detection elements is set as needed.

[0079] In some embodiments, when the steel plate detection element detects a steel signal, it checks whether there is a steel plate that meets the first condition. Specifically, this includes: when the steel plate detection element detects a steel signal, comparing the position information of the steel plate detection element with the position information of each steel plate (which may be the first steel plate to the last steel plate j to be discharged from the heating furnace, or information on all undischarged steel plates, etc.) to check whether there is a steel plate that meets the first condition.

[0080] The position information of the detection element for the steel plate being unloaded is compared with the position information of each individual steel plate. Specifically, this involves comparing the position information of the detection element with the position information of each individual steel plate sequentially, from the first steel plate to the last steel plate. The first steel plate refers to the first steel plate to be unloaded.

[0081] In some embodiments, see Figure 5 The position coordinates (numerical values) gradually increase along the transport direction of the steel plate. One end of the steel plate along its transport direction is the head end, and the other end is the tail end.

[0082] In some embodiments, when an alarm is detected, the furnace discharge is stopped and the furnace enters a full-furnace oscillation mode while the furnace feeding is stopped.

[0083] In some embodiments, if no steel plate that meets the first condition is found, an abnormal situation is identified, such as whether the steel plate position is abnormal or the steel plate detection element is abnormal. If the steel plate position is abnormal, the steel plate position is corrected. If the steel plate signal is lost, a new steel plate signal is inserted. If the steel plate detection element is abnormal, the detection signal of the steel plate detection element is processed.

[0084] There may be interference, so the detection signal of the steel plate detection element needs to be processed, specifically including: delay processing of the detection signal of the steel plate detection element.

[0085] When determining whether the steel plate position is normal, if the calculated steel plate position is 28000, but the grating at position 29800 is lit, it means that the steel plate position calculation is incorrect, and therefore the steel plate position is abnormal.

[0086] The position of the steel plate is corrected. One embodiment is as follows: if the correction range is within 2m, then the correction is made. For example, 29800-28000=1800mm, which is within 2m, then the position of the steel plate will be corrected to 29800mm.

[0087] In some embodiments, if there is no signal from the steel plate but the grating is lit, it indicates that the signal from the steel plate has been lost.

[0088] In some embodiments, inserting a new steel plate signal specifically includes: inputting the current position, length, thickness, and other signals of the steel plate onto the HMI, and after confirmation, adding a steel plate to the HMI. For example, if there are two steel plates on the HMI, and the operator wants to insert information for a steel plate (in reality, there must be three), the operator needs to input the current position, length, thickness, and other signals of the steel plate onto the HMI, and after confirmation, adding a steel plate to the HMI.

[0089] In some embodiments, after finding a steel plate that meets the first condition, it is also necessary to determine whether the steel plate meets the furnace exit condition. If so, the furnace exit procedure for the steel plate is started.

[0090] When the steel plate is in the correct position, the quenching machine is functioning normally, the water pressure in the quenching machine is normal, the actual water flow rate of the nozzle reaches the set water flow rate, and the furnace exit roller conveyor is operating normally, the steel plate is considered to meet the furnace exit conditions.

[0091] Based on the same inventive concept, the present invention also discloses a heat treatment unit steel plate tapping control device, comprising: a memory, a processor, and a heat treatment unit steel plate tapping control program stored in the memory and executable on the processor, wherein the heat treatment unit steel plate tapping control program is configured to implement the heat treatment unit steel plate tapping control method as described above.

[0092] In some embodiments, the processor may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip. The processor is typically used to control the overall operation of the electronic device. In this embodiment, the processor is used to run program code stored in the memory or process data, such as program code for a steel plate tapping control method in a heat treatment unit.

[0093] Based on the same inventive concept, the present invention also discloses a storage medium storing a heat treatment unit steel plate tapping control program, which is used to enable the processor to implement the heat treatment unit steel plate tapping control method as described above when executed.

[0094] The memory includes at least one type of readable storage medium, including flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, disk, optical disk, etc. In some embodiments, the memory may be an internal storage unit of the electronic device, such as the hard disk or memory of the electronic device. In other embodiments, the memory may also be an external storage device of the electronic device, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. Of course, the memory may include both internal storage units and external storage devices of the electronic device. In this embodiment, the memory is typically used to store operating methods and various application software installed on the electronic device, such as program code for the steel plate tapping control method of a heat treatment unit. Furthermore, the memory can also be used to temporarily store various types of data that have been output or will be output.

[0095] The process described above will be explained in detail below with specific examples.

[0096] Before exiting the furnace, gratings 1 and 2 are arranged sequentially, a total of two gratings, located in front of the quenching machine at the exit point. Of course, the present invention is not limited to two gratings before exiting the furnace; it can also use one grating or three gratings, etc. Two gratings are preferred.

[0097] When the grating detects a steel signal, it compares it with the position information of the steel plate. If the grating position is within the steel plate's position area, it is considered normal and the steel plate is discharged from the furnace normally. Otherwise, the program outputs a steel plate position abnormality signal and sends a signal to the operator to stop the discharge and enter the full furnace swing mode. The operator then confirms whether the steel plate position or the grating is incorrect. If the steel plate position is incorrect, it is corrected. If the steel plate signal is lost, a new steel plate signal is inserted. If the grating is incorrect, the grating detection signal is processed.

[0098] To prevent unknown steel plates from being discharged from the furnace, the following steps are taken: Grating signal processing, typically with a 1-second delay; Locating the steel plate at this location, executing a loop to find a steel plate that meets the following condition: If the tail position of the steel plate -1000 (e.g., 1 meter, set as needed) < the grating (phototube) position < the head position of the steel plate +1000 (e.g., 1 meter, set as needed), and a steel plate meeting this condition is found, it indicates that the grating signal is normal, and the normal discharge procedure is performed; otherwise, an alarm is triggered indicating that the steel plate signal or grating signal may be abnormal, the discharge is stopped, the entire furnace is oscillated, and feeding into the furnace is stopped.

[0099] The steel plate must meet certain conditions to be discharged from the furnace. Specifically, the steel plate must be in the correct position, the quenching machine must be functioning normally, the water pressure of the quenching machine must be normal, the actual water flow rate of the nozzle must reach the set water flow rate, and the discharge roller conveyor must be operating normally. At this time, the steel plate will be discharged from the furnace normally.

[0100] Example 3

[0101] See Figure 1 and Figure 2 This invention provides a control method for preventing abnormal steel plate output from a heat treatment unit, comprising the following steps:

[0102] Steel plate detection elements are installed before the furnace outlet and before the furnace inlet;

[0103] When any steel plate detection element detects a steel signal, it checks whether there is a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the steel plate detection element ≤ the head position of the steel plate + A, where A is the set allowable deviation value.

[0104] If a steel plate that meets the first condition is found, the search is exited. If the steel plate detection element is for furnace entry detection, the furnace entry procedure is started. If the steel plate detection element is for furnace exit detection, the furnace exit procedure is started.

[0105] If no steel plate that meets the first condition is found, an abnormal signal is returned and an alarm is triggered. If the steel plate detection element is for furnace entry detection, the furnace entry procedure is stopped. If the steel plate detection element is for furnace exit detection, the furnace exit procedure is stopped.

[0106] In some embodiments, if no steel plate that meets the first condition is found, and the steel plate detection element is a furnace exit detection element, then the furnace exit is stopped and the furnace enters a full-furnace oscillation mode and the furnace entry is stopped.

[0107] In some embodiments, if no steel plate that meets the first condition is found, an abnormal situation is identified, such as whether the steel plate position is abnormal or the steel plate detection element is abnormal. If the steel plate position is abnormal, the steel plate position is corrected. If the steel plate signal is lost, a new steel plate signal is inserted. If the steel plate detection element is abnormal, the detection signal of the steel plate detection element is processed.

[0108] Based on the same inventive concept, the present invention also discloses a control device for preventing abnormal steel plate discharge from a heat treatment unit, comprising: a memory, a processor, and a heat treatment unit steel plate charging control program stored in the memory and executable on the processor, wherein the heat treatment unit steel plate charging control program is configured to implement the control method for preventing abnormal steel plate discharge from the heat treatment unit as described above.

[0109] The process described above will be explained in detail below with specific examples.

[0110] The control method for preventing abnormal steel plate tapping provided by this invention is as follows:

[0111] To prevent unknown steel plates from entering the furnace: Specifically, the following steps are taken: grating signal processing, typically with a 1-second delay; a steel plate is located at this position, and a loop is executed to find a steel plate that meets the following condition: if the tail position of the steel plate -1000 ≤ phototube position ≤ head position of the steel plate +1000, then the grating signal is normal, and the normal furnace entry procedure is performed; otherwise, an alarm is triggered indicating that the steel plate signal or grating signal may be abnormal, and the furnace entry is stopped.

[0112] To prevent unknown steel plates from being discharged from the furnace, the following steps are taken: Grating signal processing, typically with a 1-second delay; the system searches for the steel plate at this location, executing a loop to find a steel plate that meets the following condition: if the tail position of the steel plate -1000 < phototube position < head position of the steel plate +1000, and a steel plate meeting this condition is found, it indicates that the grating signal is normal, and the normal discharge procedure is performed; otherwise, an alarm is triggered indicating that the steel plate signal or grating signal may be abnormal, the discharge is stopped, the entire furnace is oscillated, and feeding into the furnace is stopped.

[0113] The steel plate must meet certain conditions to be discharged from the furnace. Specifically, the steel plate must be in the correct position, the quenching machine must be functioning normally, the water pressure of the quenching machine must be normal, the actual water flow rate of the nozzle must reach the set water flow rate, and the discharge roller conveyor must be operating normally. At this time, the steel plate will be discharged from the furnace normally.

[0114] The invention has shown remarkable effects after its implementation, effectively preventing red-hot steel from being produced from the furnace, greatly improving production efficiency, and making the unit safer and more stable.

[0115] Example 4

[0116] See Figure 3 and Figure 4 This invention provides a control method for a heat treatment unit's injection device, comprising the following steps:

[0117] Obtain the number of steel plates n for the unit (e.g., obtain the total number of steel plates n for the entire heat treatment unit);

[0118] Determine if n is 0;

[0119] If n = 0, then the position of the marker corresponding to the jetting device will be set to the first value;

[0120] If n>0, then start executing the loop: initialize the loop variable i=1, determine whether the position of the i-th steel plate meets the first condition, the first condition is the tail position of the steel plate - B≤ the position of the blowing device≤ the head position of the steel plate + B, where B is the set allowable deviation value (B is set according to actual needs).

[0121] If the position of the i-th steel plate does not meet the first condition, then determine whether i is less than n. If not, then set the position of the marker corresponding to the blowing device as the first value and exit the loop. If yes, then i+1 and continue to determine the next steel plate.

[0122] If the position of the i-th steel plate satisfies the first condition, then the position of the marker corresponding to the blowing device is set to the second value, and the loop ends;

[0123] When the flag corresponding to the blowing device is the second value, the blowing device is controlled to start.

[0124] When the flag corresponding to the blowing device is at the first value, the blowing device is controlled to stop.

[0125] In some embodiments, B is generally the deviation of the operating length, within 500 mm.

[0126] This invention can calculate the position of each steel plate by tracking data blocks. The position information of each steel plate (the head and tail positions of the steel plate) is calculated by a program. For example, the initial position of each steel plate is known, and its position at the corresponding time is obtained by integrating the velocity with time. Of course, this position is theoretical and can be corrected by using a grating.

[0127] In some embodiments, see Figure 5 The position value gradually increases along the transport direction of the steel plate. One end of the steel plate along its transport direction is the head end, and the other end is the tail end.

[0128] In some embodiments, the first value is 0, and / or the second value is 1.

[0129] In some embodiments, the control method of the heat treatment unit spraying device of the present invention further includes the following steps: defining each spraying device according to coordinates, specifically including: defining the position coordinates of each spraying device as spray[1..m]:DINT, where m is the number of spraying devices.

[0130] In some embodiments, the control method of the heat treatment unit blowing device of the present invention further includes the following steps: configuring a flag bit and an output point corresponding to each blowing device; when the flag bit corresponding to the blowing device is a second value, the output point corresponding to the blowing device outputs a set signal to control the blowing device to start; when the flag bit corresponding to the blowing device is a first value, the output point corresponding to the blowing device outputs a reset signal to control the blowing device to stop.

[0131] The control method of the heat treatment unit blowing device of the present invention is stable and reliable, and has the characteristics of stability, safety, versatility, reduced investment cost (no need to install grating), high program code execution efficiency, and low resource consumption.

[0132] Based on the same inventive concept, the present invention also discloses a control device for a heat treatment unit blowing device, comprising: a memory, a processor, and a control program for the heat treatment unit blowing device stored in the memory and executable on the processor, wherein the control program for the heat treatment unit blowing device is configured to implement the control method for the heat treatment unit blowing device as described above.

[0133] In some embodiments, the processor may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip. The processor is typically used to control the overall operation of the electronic device. In this embodiment, the processor is used to run program code stored in the memory or process data, such as program code for a control method of a heat treatment unit's blowing device.

[0134] Based on the same inventive concept, the present invention also discloses a storage medium storing a control program for a heat treatment unit's blowing device. The control program for the heat treatment unit's blowing device is used to enable the processor to implement the control method for the heat treatment unit's blowing device as described above when executed.

[0135] The memory includes at least one type of readable storage medium, including flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, disk, optical disk, etc. In some embodiments, the memory may be an internal storage unit of the electronic device, such as the hard disk or memory of the electronic device. In other embodiments, the memory may also be an external storage device of the electronic device, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. Of course, the memory may include both internal storage units and external storage devices of the electronic device. In this embodiment, the memory is typically used to store operating methods and various application software installed on the electronic device, such as program code for the control method of the heat treatment unit's blowing device. Furthermore, the memory can also be used to temporarily store various types of data that have been output or will be output.

[0136] The process described above will be explained in detail below with specific examples.

[0137] A first blowing device is arranged between the shot blasting rollers and the furnace inlet rollers of the shot blasting machine, a second blowing device is arranged between the furnace inlet rollers and the furnace inlet, and a third blowing device is arranged between the quenching machine and the furnace outlet rollers.

[0138] In some embodiments, a blow valve is installed at the outlet of the shot blasting machine, the inlet of the furnace, and the outlet of the quenching machine. The valve is controlled by a PLC controller, and the valve is connected to the output module of the controller. No steel plate detection devices are required before or after the valves; the PLC automatically controls the valves based on the position of the steel plates.

[0139] The process described above will be explained in detail below with specific examples.

[0140] A first blowing device is arranged between the shot blasting rollers and the furnace inlet rollers of the shot blasting machine, a second blowing device is arranged between the furnace inlet rollers and the furnace inlet, and a third blowing device is arranged between the quenching machine and the furnace outlet rollers.

[0141] In some embodiments, a blow valve is installed at the outlet of the shot blasting machine, the inlet of the furnace, and the outlet of the quenching machine. The valve is controlled by a PLC controller, and the valve is connected to the output module of the controller. No steel plate detection devices are required before or after the valves; the PLC automatically controls the valves based on the position of the steel plates.

[0142] The control method for the jet blowing device provided by the present invention specifically includes:

[0143] 1) Define the position coordinates of the spray device as spray[1..3]:DINT;

[0144] The position coordinates of the spray device at the shot blasting outlet are spray[1]:=89000, and this value will vary depending on the specific situation;

[0145] The coordinates of the position of the injection device at the furnace inlet are spray[2]:=110000, and this value will vary depending on the specific situation;

[0146] The position coordinates of the spray device at the outlet of the quenching machine are spray[3]:=310000, and this value will vary depending on the specific situation;

[0147] Output point:

[0148] The switch for the shot blasting outlet is Q1.0;

[0149] The blower switch at the furnace inlet is Q1.1;

[0150] The switch for the jetting device at the outlet of the quenching machine is Q1.2;

[0151] Output points: Q1.0, Q1.1, and Q1.2 can be adjusted according to specific circumstances.

[0152] Flag position:

[0153] The switch for the blowing device at the shot blasting outlet is set_flag[1];

[0154] The switch for the blower at the furnace inlet is set_flag[2];

[0155] The switch for the blowing device at the outlet of the quenching machine is set_flag[3];

[0156] 2) The following is the control description of the flag bit set_flag[1]:

[0157] Obtain the number of steel plates, n, for the unit.

[0158] If n = 0, then the number of steel plates at this blowing device position is 0, and the flag bit set_flag[1] = 0;

[0159] If n>0, then start executing the loop: initialize the loop variable i=1, first determine whether the position of the i-th steel plate satisfies: the tail position of the steel plate -1000 < the shot blasting outlet spray[1] < the head position of the steel plate +1000. If this condition is not met, first determine whether i is less than n. If not, exit the loop and set_flag[1]=0. If i is less than n, then i=i+1, and continue to judge the next steel plate.

[0160] If the position of the i-th steel plate satisfies: the tail position of the steel plate -1000 < the shot blasting outlet spray[1] < the head position of the steel plate +1000, then return to the loop and set_flag[1] = 1;

[0161] 3) Control instructions for the shot blasting outlet spray device switch Q1.0:

[0162] If set_flag[1] = 1, that is, Q1.0 is set, that is, the blowing device is started;

[0163] If set_flag[1] = 0, Q1.0 is reset, and the blowing device stops.

[0164] The control method for the shot blasting device of the heat treatment unit proposed in this invention can effectively prevent shot blasting residue on the steel plate, prevent oxygen from being introduced into the steel plate, and prevent residual moisture on the steel plate, thereby improving the unit's production efficiency, safety, and stability. The significant effects of this invention after implementation include greatly reducing the workload of maintenance personnel, and accurate positioning reduces project investment.

[0165] Example 5

[0166] This invention also discloses a heat treatment unit steel plate feeding control system, including a controller. The controller has a heat treatment unit steel plate feeding control program configured to implement the heat treatment unit steel plate feeding control method as described in Embodiment 1.

[0167] The controller may include a processor and a memory. The heat treatment unit's steel plate feeding control program is stored in the memory and can run on the processor.

[0168] Furthermore, the heat treatment unit steel plate charging control system of the present invention also includes a steel plate charging detection element, which is connected to the controller and is used to transmit the detected information to the controller. The steel plate charging detection element is a grating.

[0169] Example 6

[0170] See Figure 1 and Figure 2The present invention also discloses a heat treatment unit control system, including a controller and a steel plate detection element for exiting the furnace and / or a steel plate detection element for entering the furnace. The steel plate detection element for exiting the furnace is used to transmit the detected information to the controller, and the steel plate detection element for entering the furnace is used to transmit the detected information to the controller. The controller is provided with a steel plate exiting control program and / or a steel plate entering control program for the heat treatment unit. The steel plate exiting control program for the heat treatment unit is configured to implement the steel plate exiting control method for the heat treatment unit as described in Embodiment 1; the steel plate entering control program for the heat treatment unit is configured to implement the steel plate entering control method for the heat treatment unit as described in Embodiment 2.

[0171] See Figure 3 and Figure 4 In some embodiments, the heat treatment unit control system of the present invention further includes at least one of a first blowing device located between the shot blasting roller and the furnace inlet roller of the shot blasting machine, a second blowing device located between the furnace inlet roller and the furnace inlet, and a third blowing device located between the quenching machine and the furnace outlet roller. The controller is provided with a control program for the heat treatment unit blowing device, and the control program for the heat treatment unit blowing device is configured to implement the control method for the heat treatment unit blowing device as described in Embodiment 4.

[0172] Example 7

[0173] See Figure 1 and Figure 2 The present invention also discloses a steel plate heat treatment production line, including a controller, a steel plate detection element for entering the furnace, and a furnace roller conveyor and a heating furnace arranged in sequence. The steel plate detection element for entering the furnace is used to transmit the detected information to the controller. The controller is equipped with a steel plate entering the furnace control program for the heat treatment unit. The steel plate entering the furnace control program for the heat treatment unit is configured to implement the steel plate entering the furnace control method for the heat treatment unit as described in Embodiment 1.

[0174] In some embodiments, the steel plate heat treatment production line of the present invention further includes a steel plate exiting the furnace detection element, which is used to transmit the detected information to a controller.

[0175] The controller is equipped with a heat treatment unit steel plate tapping control program, which is configured to implement the heat treatment unit steel plate tapping control method as described in Embodiment 2.

[0176] The steel plate heat treatment production line also includes a quenching machine and a furnace exit roller conveyor, wherein the quenching machine is located between the heating furnace outlet and the furnace exit roller conveyor.

[0177] The detection element for the steel plate exiting the furnace is arranged in front of the furnace outlet.

[0178] The detection element for the steel plate entering the furnace is arranged in front of the furnace inlet.

[0179] In some embodiments, the steel plate heat treatment production line of the present invention may include a shot blasting machine or may not include a shot blasting machine. When a shot blasting machine is included, the shot blasting machine is located in front of the furnace feed roller conveyor.

[0180] See Figure 3 and Figure 4 In some embodiments, the steel plate heat treatment production line of the present invention further includes at least one of a first blowing device located at the outlet of the shot blasting machine, a second blowing device located at the inlet of the heating furnace, and a third blowing device located at the outlet of the quenching machine. The controller is provided with a control program for the blowing device of the heat treatment unit, and the control program for the blowing device of the heat treatment unit is configured to implement the control method of the blowing device of the heat treatment unit as described in Embodiment 4.

[0181] The first blowing device is located between the shot blasting rollers and the furnace feed rollers of the shot blasting machine. The second blowing device is located between the furnace feed rollers and the furnace inlet. The third blowing device is located between the quenching machine and the furnace outlet rollers.

[0182] When steel plates leave the shot blasting machine, they are very likely to be covered with shot. Therefore, a blower is added to the outlet to blow the shot off.

[0183] When steel plates are fed into the furnace, they can draw air into the furnace, affecting the atmosphere inside and thus the quality of the products and the service life of the furnace. Therefore, a blowing device is added to the inlet to prevent excessive air from entering the furnace.

[0184] When steel plates leave the quenching machine, they are very likely to be covered with water droplets, so a spraying device is added to its outlet to blow the water droplets off.

[0185] In some embodiments, the first, second, and third blowing devices include blowing valves, which are controlled by a controller.

[0186] In some embodiments, the controller is a PLC controller, but is not limited to a PLC controller.

[0187] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0188] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0189] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0190] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0191] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0192] See Figure 1 and Figure 2This invention also discloses a steel plate heat treatment production line, comprising a furnace feed roller conveyor, a heating furnace, a quenching machine, a controller, a furnace-outgoing steel plate detection element, and / or a furnace-ingoing steel plate detection element arranged sequentially. The furnace-outgoing steel plate detection element transmits the detected information to the controller, and the furnace-ingoing steel plate detection element transmits the detected information to the controller. The controller is equipped with a heat treatment unit steel plate outgoing control program and / or a heat treatment unit steel plate incoming control program. The heat treatment unit steel plate outgoing control program is configured to implement the heat treatment unit steel plate outgoing control method as described in Embodiment 1; the heat treatment unit steel plate incoming control program is configured to implement the heat treatment unit steel plate incoming control method as described in Embodiment 2.

[0193] The steel plate heat treatment production line also includes a furnace exit roller conveyor, and the quenching machine is located between the heating furnace outlet and the furnace exit roller conveyor.

[0194] The detection element for the steel plate exiting the furnace is arranged in front of the furnace outlet.

[0195] The detection element for the steel plate entering the furnace is arranged in front of the furnace inlet.

[0196] In some embodiments, the steel plate heat treatment production line of the present invention may include a shot blasting machine or may not include a shot blasting machine. When a shot blasting machine is included, the shot blasting machine is located in front of the furnace feed roller conveyor.

[0197] See Figure 3 and Figure 4 In some embodiments, the steel plate heat treatment production line of the present invention further includes at least one of a first blowing device located between the shot blasting rollers and the furnace inlet rollers of the shot blasting machine, a second blowing device located between the furnace inlet rollers and the furnace inlet, and a third blowing device located between the quenching machine and the furnace outlet rollers. The controller is provided with a control program for the blowing device, and the control program for the blowing device is configured to implement the control method of the blowing device of the heat treatment unit as described in Embodiment 4.

[0198] When steel plates leave the shot blasting machine, they are very likely to be covered with shot. Therefore, a blower is added to the outlet to blow the shot off.

[0199] When steel plates are fed into the furnace, they can draw air into the furnace, affecting the atmosphere inside and thus the quality of the products and the service life of the furnace. Therefore, a blowing device is added to the inlet to prevent excessive air from entering the furnace.

[0200] When steel plates leave the quenching machine, they are very likely to be covered with water droplets, so a spraying device is added to its outlet to blow the water droplets off.

[0201] In some embodiments, the first, second, and third blowing devices include blowing valves, which are controlled by a controller.

[0202] In some embodiments, the controller is a PLC controller, but is not limited to a PLC controller.

[0203] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0204] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0205] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0206] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0207] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling the feeding of steel plates into a heat treatment unit, characterized in that, Includes the following steps: The signal of the steel plate detection element entering the furnace is acquired. The steel plate detection element is arranged in front of the furnace inlet. When the steel plate detection element detects the presence of steel, it checks whether there is a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the steel plate detection element ≤ the head position of the steel plate + A, where A is the set allowable deviation value. If a steel plate that meets the first condition is found, the search is exited and the furnace feeding procedure is started. If no steel plate that meets the first condition is found, an alarm will be triggered to indicate an abnormality, and the furnace feeding will be stopped.

2. The method for controlling the steel plate feeding into the furnace in a heat treatment unit as described in claim 1, characterized in that: There are multiple detection elements for the steel plates entering the furnace, and these multiple detection elements are distributed at intervals along the running direction of the steel plates.

3. The method for controlling the steel plate feeding into the furnace in a heat treatment unit as described in claim 1, characterized in that: When the steel plate detection element detects the presence of steel, it checks whether there is a steel plate that meets the first condition. Specifically, this includes comparing the position information of the steel plate detection element with the position information of each steel plate to check whether there is a steel plate that meets the first condition.

4. The method for controlling the feeding of steel plates into the furnace in a heat treatment unit as described in claim 1, characterized in that: The position information of the steel plate detection element entering the furnace is compared with the position information of each steel plate. Specifically, the position information of the steel plate detection element is compared with the position information of each steel plate in turn, according to the order in which the steel plates enter the furnace.

5. The method for controlling the steel plate feeding into the furnace in a heat treatment unit as described in claim 1, characterized in that: If no steel plate that meets the first condition is found, an abnormal situation is confirmed. If the steel plate position is abnormal, the steel plate position is corrected. If the steel plate signal is lost, a new steel plate signal is inserted. If the furnace-entry steel plate detection element is abnormal, the detection signal of the furnace-entry steel plate detection element is processed.

6. The method for controlling the steel plate feeding into the furnace in a heat treatment unit as described in claim 1, characterized in that: After finding a steel plate that meets the first condition, it is necessary to determine whether the distance between the last steel plate in the furnace and the furnace inlet is sufficient for the steel plate to enter the furnace at high speed and then decelerate to the process speed. If it is sufficient, the furnace entry procedure for the steel plate is started.

7. A steel plate feeding control system for a heat treatment unit, characterized in that: The system includes a controller, which contains a heat treatment unit steel plate furnace feeding control program, the heat treatment unit steel plate furnace feeding control program being configured to implement the heat treatment unit steel plate furnace feeding control method as described in any one of claims 1 to 6.

8. The heat treatment unit steel plate feeding control system as described in claim 7, characterized in that: It also includes a furnace-entry steel plate detection element, which is connected to the controller and is used to transmit the detected information to the controller.

9. A steel plate heat treatment production line, characterized in that: The device includes a heating furnace, a controller, and a steel plate detection element. The steel plate detection element is used to transmit the detected information to the controller. The controller has a steel plate feeding control program for the heat treatment unit, which is configured to implement the steel plate feeding control method for the heat treatment unit as described in any one of claims 1 to 6.

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