Heat treatment unit steel plate furnace discharge control method, system and steel plate heat treatment production line

Abstract

The present invention discloses a heat treatment unit steel plate out of furnace control method, system and steel plate heat treatment production line, the heat treatment unit steel plate out of furnace control method, including the following steps: obtaining the signal of the out of furnace steel plate detection element; when the out of furnace steel plate detection element detects the steel signal, searching whether there is a steel plate that meets the first condition: the tail position of the steel plate ‑A ≤ the position of the out of furnace steel plate detection element ≤ the head position of the steel plate + A, A is the set allowable deviation value; if a steel plate that meets the first condition is found, then exit the search and start the out of furnace program; if no steel plate that meets the first condition is found, then alarm prompts abnormality and stops the out of furnace. The present invention can prevent unknown steel plates from coming out of the furnace, and very effectively prevent red steel from coming out of the furnace, greatly improve production efficiency, and make the unit safer and more stable.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat treatment control, and in particular relates to a heat treatment unit steel plate in and out of a furnace control method, a system and a steel plate heat treatment production line. Background Art

[0002] In the heat treatment process, unknown steel plates may enter the furnace and unknown steel plates may come out of the furnace. And the steel plates need to be sent into the quenching furnace according to the process speed. The temperature of the quenching furnace is relatively high, generally around 900 degrees. Therefore, after the steel plates inside are from the entrance of the heating furnace to the exit of the heating furnace, the steel plates are in the state of red steel. Then, when the steel plates come out of the furnace, the quenching machine behind needs to spray water to quench the steel plates. The furnace rollers of the quenching furnace are in the furnace for a long time, and their roller shape must be maintained, so they must rotate all the time. The quenching machine may not discharge water due to various reasons. Under various factors, if it is not properly controlled, it is very easy to cause red steel to come out, which will cause unqualified products, and even endanger equipment and personal safety, causing equipment damage and personal injury, with very serious consequences.

[0003] In the heat treatment process, the steel plate needs to be shot blasted first, and then sent into the quenching furnace according to the process speed. The temperature of the quenching furnace is relatively high, generally around 900 degrees. Therefore, the steel plate inside is in a red steel state from the entrance of the heating furnace to the exit of the heating furnace. Then, when the steel plate is out of the furnace, the quenching machine behind it needs to spray water to quench the steel plate.

[0004] When the steel plate leaves the shot blasting machine, it is very easy to be attached with the shot, so a blowing device is added at its outlet to blow the shot off.

[0005] When the steel plate enters the furnace, it will bring air into the furnace, affecting the atmosphere in the furnace, thereby affecting the product quality and the service life of the furnace. Therefore, a blowing device is added at the entrance to prevent too much air from entering the furnace.

[0006] When the steel plate leaves the quenching machine, it is very easy to be attached with water droplets, so a blowing device is added at its outlet to blow off the water droplets.

[0007] The traditional method of controlling the blowing device is to let the blowing device blow all the time, which wastes compressed air extremely and causes a waste of energy. Summary of the invention

[0008] The object of the present invention is to overcome at least one defect in the prior art and to provide a method and system for controlling the steel plate discharge from a heat treatment unit and a steel plate heat treatment production line.

[0009] The technical solution of the present invention is implemented as follows: The present invention discloses a method for controlling the steel plate out of a heat treatment unit, comprising the following steps:

[0010] Acquire the signal of the out-of-furnace steel plate detection element;

[0011] When the out-of-furnace steel plate detection element detects a steel signal, it searches whether there is a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the out-of-furnace 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-out procedure is started;

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

[0014] Furthermore, when the out-of-the-furnace steel plate detection element detects the presence of steel signal, it searches whether there is a steel plate that meets the first condition, specifically including: when the out-of-the-furnace steel plate detection element detects the presence of steel signal, the position information of the out-of-the-furnace steel plate detection element is compared with the position information of each steel plate to search whether there is a steel plate that meets the first condition.

[0015] Furthermore, when the alarm prompts an abnormality, the furnace unloading is stopped and the whole furnace swing mode is entered and the furnace loading is stopped.

[0016] Furthermore, after finding a steel plate that meets the first condition, it is necessary to determine whether the steel plate meets the furnace discharge condition. If so, the furnace discharge procedure of the steel plate is started;

[0017] When the steel plate is in normal position, the quenching machine is normal, the water pressure of the quenching machine is normal, the actual water flow of the nozzle reaches the set water flow, and the furnace roller table operates normally, it is considered that the steel plate meets the furnace discharge conditions.

[0018] Furthermore, a steel plate detection element is arranged before the outlet of the heating furnace.

[0019] Furthermore, there are a plurality of out-of-furnace steel plate detection elements, which are distributed at intervals along the running direction of the steel plate.

[0020] Furthermore, if no steel plate satisfying the first condition is found, the following steps are also included: confirming the abnormal situation; if the steel plate position is abnormal, correcting the steel plate position; if the steel plate signal is lost, inserting a new steel plate signal; if the furnace-outgoing steel plate detection element is abnormal, processing the furnace-outgoing steel plate detection element detection signal.

[0021] The present invention also discloses a heat treatment unit steel plate out of furnace control system, including a controller, wherein the controller is provided with a heat treatment unit steel plate out of furnace control program, and the heat treatment unit steel plate out of furnace control program is configured to implement the heat treatment unit steel plate out of furnace control method as described above.

[0022] Furthermore, the heat treatment unit steel plate out-of-furnace control system of the present invention further comprises an out-of-furnace steel plate detection element, which is connected to the controller and is used to transmit detected information to the controller.

[0023] The present invention also discloses a steel plate heat treatment production line, comprising a heating furnace, a controller and a steel plate out-of-furnace detection element, wherein the steel plate out-of-furnace detection element is used to transmit the detected information to the controller, wherein the controller is provided with a heat treatment unit steel plate out-of-furnace control program, and the heat treatment unit steel plate out-of-furnace control program is configured to implement the heat treatment unit steel plate out-of-furnace control method as described above.

[0024] The present invention has at least the following beneficial effects: the present invention arranges an out-of-furnace steel plate detection element in front of the outlet of the heating furnace; when the out-of-furnace steel plate detection element detects a steel signal, it searches whether there is a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the out-of-furnace 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 out-of-furnace program is started; if no steel plate that meets the first condition is found, an alarm is issued to indicate an abnormality and the out-of-furnace is stopped.

[0025] The above scheme of the present invention can prevent unknown steel plates from being discharged from the furnace, and can more effectively prevent abnormal discharge of steel plates, thereby improving the production efficiency, safety and stability of the unit. The present invention has a significant effect after being put into use, and can effectively prevent red steel from being discharged from the furnace, greatly improve production efficiency, and make the unit safer and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 A schematic diagram of the arrangement of the steel plate detection element provided in an embodiment of the present invention;

[0028] Figure 2 The present invention provides a flow chart of a method for controlling the steel plate discharge from a heat treatment unit according to an embodiment of the present invention.

[0029] Figure 3 A schematic diagram of the arrangement of various blowing devices provided in an embodiment of the present invention;

[0030] Figure 4 A flow chart of a control method for a blowing device of a heat treatment unit provided by an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the position coordinates of a heat treatment unit provided by an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of a steel plate entering a furnace is provided in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0034] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "multiple" and "several" mean two or more.

[0036] Embodiment 1

[0037] See also Figure 1 and Figure 2 The embodiment of the present invention provides a method for controlling the steel plate discharge from a heat treatment unit, comprising the following steps:

[0038] Acquire the signal of the out-of-furnace steel plate detection element;

[0039] When the steel plate detection element detects a steel signal, it searches for 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, the search is exited, a normal signal is returned (indicating that the signal of the steel plate detection element is normal), and the furnace discharge procedure is started;

[0041] If no steel plate that meets the first condition is found, an abnormal signal is returned and an alarm is issued to indicate an abnormality. For example, the position of the steel plate or the steel plate detection element may be abnormal, and the furnace is stopped.

[0042] Furthermore, after obtaining the steel signal detected by the steel plate detection element, the signal is processed, and then it is found whether there is a steel plate that meets the first condition. The signal processing is generally delayed for a set time (such as 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 speed and time. Of course, this position is theoretical, and the calculated position can also be corrected by the grating.

[0044] Furthermore, the out-of-furnace steel plate detection element is arranged before the outlet of the heating furnace and close to the outlet of the heating furnace.

[0045] Furthermore, the out-of-furnace steel plate detection element is a (reverse-beam grating).

[0046] In some embodiments, the distance between the out-of-furnace steel plate detection element and the heating furnace outlet is set as required, generally 1 to 3 meters, and cannot be less than 1 meter, that is, the out-of-furnace steel plate detection element is located 1 to 3 meters in front of the heating furnace outlet, and cannot be less than 1 meter. In some embodiments, A is generally 1 to 1.5 meters.

[0047] In some embodiments, there are multiple out-of-furnace steel plate detection elements, which are spaced apart along the out-of-furnace steel plate direction. The spacing between adjacent out-of-furnace steel plate detection elements is set as required.

[0048] In some embodiments, when the out-of-baked steel plate detection element detects the presence of steel signal, it searches whether there is a steel plate that meets the first condition, specifically including: when the out-of-baked steel plate detection element detects the presence of steel signal, the position information of the out-of-baked steel plate detection element is compared with the position information of each steel plate (it can be the first steel plate to the last steel plate j that needs to be taken out of the heating furnace, or it can be the information of all steel plates that have not been taken out of the furnace, etc.) to search whether there is a steel plate that meets the first condition.

[0049] The position information of the out-of-furnace steel plate detection element is compared with the position information of each steel plate, specifically including: comparing the position information of the out-of-furnace steel plate detection element with the position information of each steel plate in sequence from the first steel plate to the last steel plate j according to the order in which the steel plates are out of the furnace. The first steel plate refers to the front steel plate, i.e., the first steel plate to be taken out of the furnace.

[0050] In some embodiments, see Figure 5 The position coordinate (value) increases gradually along the transmission direction of the steel plate. One end of the steel plate along its transmission direction is the head end, and the other end is the tail end.

[0051] In some embodiments, when an alarm is abnormal, the furnace unloading is stopped and the whole furnace swing mode is entered and the furnace loading is stopped.

[0052] In some embodiments, if a steel plate that meets the first condition is not found, the abnormal situation is confirmed, 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 steel plate detection element detection signal is processed.

[0053] Generally, there may be interference, and 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.

[0054] When judging whether the steel plate position is normal, if the calculated steel plate position is X1 (such as 28000mm), and the grating at the X2 position (such as 29800mm) is lit, it means that the steel plate position is calculated incorrectly, which means that the steel plate position is abnormal.

[0055] The position of the steel plate is corrected. One embodiment is: if the correction range is within the set range (such as 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 (such as 29800mm).

[0056] In some embodiments, if there is no steel plate signal but the grating is lit, it proves that the signal of the steel plate is lost.

[0057] In some embodiments, inserting a new steel plate signal specifically includes: inputting the current position, length, thickness and other signals of the steel plate on the HMI, and after confirmation, the HMI will add a steel plate. For example, when there are 2 steel plates on the human-machine interface, if the operator wants to insert a steel plate information (the actual object must be 3), the current position, length, thickness and other signals of the steel plate need to be input on the HMI, and after confirmation, the HMI will add a steel plate.

[0058] In some embodiments, after finding a steel plate that meets the first condition, it is necessary to determine whether the steel plate meets the furnace discharge condition. If so, the furnace discharge procedure of the steel plate is started;

[0059] When the steel plate is in normal position, the quenching machine is normal, the water pressure of the quenching machine is normal, the actual water flow of the nozzle reaches the set water flow, and the furnace roller table operates normally, it is considered that the steel plate meets the furnace discharge conditions.

[0060] Based on the same inventive concept, the present invention also discloses a heat treatment unit steel plate out-of-furnace control device, comprising: a memory, a processor, and a heat treatment unit steel plate out-of-furnace control program stored in the memory and executable on the processor, wherein the heat treatment unit steel plate out-of-furnace control program is configured to implement the heat treatment unit steel plate out-of-furnace control method as described above.

[0061] 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 generally used to control the overall operation of the electronic device. In this embodiment, the processor is used to run the program code or process data stored in the memory, such as the program code of the heat treatment unit steel plate discharge control method.

[0062] Based on the same inventive concept, the present invention also discloses a storage medium, which stores a heat treatment unit steel plate discharge control program, and the heat treatment unit steel plate discharge control program is used to enable the processor to implement the heat treatment unit steel plate discharge control method as described above when executing.

[0063] The memory includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), 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 can be an internal storage unit of the electronic device, such as a hard disk or memory of the electronic device. In other embodiments, the memory can also be an external storage device of the electronic device, such as a plug-in hard disk equipped on the electronic device, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), etc. Of course, the memory can also include both the internal storage unit of the electronic device and its external storage device. In this embodiment, the memory is generally used to store the operating method and various application software installed in the electronic device, such as the program code of the heat treatment unit steel plate furnace control method, etc. In addition, the memory can also be used to temporarily store various types of data that have been output or are to be output.

[0064] The above process is described in detail below through a specific example.

[0065] Before leaving the furnace, gratings 1 to 2 are arranged in sequence, a total of 2 gratings, located in front of the quenching machine at the furnace. Of course, the present invention is not limited to 2 gratings before leaving the furnace, but can also be 1 grating or 3 gratings, etc. Preferably, 2 gratings are used.

[0066] When the grating detects a steel signal, it is compared with the position information of the steel plate here. If the grating position is within the steel plate position area, it is considered normal and the furnace is discharged normally. Otherwise, the program outputs an abnormal steel plate position signal and sends a signal to the operator to stop the furnace discharge and enter the full furnace swing mode. The operator is required to confirm whether the steel plate position or the grating is incorrect. If the steel plate position is incorrect, the steel plate position 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.

[0067] Prevent unknown steel plates from being discharged from the furnace, specifically: grating signal processing, generally with a delay of 1 second; find the steel plate here, execute the loop, and find the steel plate that meets the position: if the tail position of the steel plate -1000 (such as 1 meter, set as needed) < the grating (phototube) position < the head position of the steel plate +1000 (such as 1 meter, set as needed), if a steel plate that meets this condition is found, it means that the grating signal is normal, and the normal discharge procedure is carried out, otherwise an alarm prompts: the steel plate signal or the grating signal may be abnormal, the discharge is stopped, the whole furnace is swung and the entry into the furnace is stopped.

[0068] The steel plate must meet the conditions to be discharged from the furnace, specifically: when the steel plate position is normal, the quenching machine is normal, the quenching machine water pressure is normal, the actual water flow of the nozzle reaches the set water flow, and the furnace roller table operates normally, the steel plate will be discharged from the furnace normally.

[0069] Embodiment 2

[0070] The present invention also discloses a method for controlling the steel plate entering a furnace of a heat treatment unit, comprising the following steps:

[0071] Acquire the signal of the detection element of the steel plate entering the furnace;

[0072] When the steel plate detection element detects a steel signal, it searches for 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;

[0073] If a steel plate that meets the first condition is found, a normal signal is returned (indicating that the signal of the detection element of the steel plate entering the furnace is normal), the search is exited, and the furnace entry procedure is started;

[0074] If no steel plate meeting the first condition is found, an abnormal signal is returned, an alarm is sounded to indicate the abnormality, and the steel plate is stopped from entering the furnace.

[0075] Furthermore, when the steel plate detection element detects the presence of steel, signal processing is performed, generally with a delay of a set time (eg, 1 second).

[0076] 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 speed and time. Of course, this position is theoretical, and the calculated position can also be corrected by the grating.

[0077] The steel plate detection element is arranged in front of the heating furnace entrance. The steel plate detection element is used to detect the steel plate on the furnace roller.

[0078] In some embodiments, there are multiple steel plate detection elements entering the furnace, and the multiple steel plate detection elements entering the furnace are spaced apart along the direction in which the steel plate enters the furnace. The spacing between adjacent steel plate detection elements entering the furnace is set as required. In some embodiments, the spacing between the steel plate detection element entering the furnace and the entrance of the heating furnace is generally less than 1 meter, such as the steel plate detection element entering the furnace is generally located within 1 meter of the entrance of the heating furnace.

[0079] In some embodiments, the steel plate detection element adopts a grating (opposite beam grating).

[0080] In some embodiments, when the steel plate detection element entering the furnace detects the presence of steel signal, it searches whether there is a steel plate that meets the first condition, specifically including: when the steel plate detection element entering the furnace detects the presence of steel signal, the position information of the steel plate detection element entering the furnace is compared with the position information of each steel plate (it can be the first steel plate to the last steel plate j that needs to enter the furnace on the furnace roller, or it can be the information of all steel plates that have not entered the furnace, etc.) to search whether there is a steel plate that meets the first condition.

[0081] The position information of the steel plate detection element entering the furnace is compared with the position information of each steel plate, specifically including: comparing the position information of the steel plate detection element with the position information of each steel plate in sequence according to the order in which the steel plates enter the furnace.

[0082] In some embodiments, if no steel plate meeting the first condition is found, the abnormal situation is confirmed; if the position of the steel plate is abnormal, the position of the steel plate is corrected; if the steel plate signal is lost, a new steel plate signal is inserted; if the steel plate detection element entering the furnace is abnormal, the detection signal of the steel plate detection element entering the furnace is processed.

[0083] Generally, there may be interference, and 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.

[0084] When judging whether the steel plate position is normal, if the calculated steel plate position is X1 (such as 28000mm), and the grating at the X2 position (such as 29800mm) is lit, it means that the steel plate position is calculated incorrectly, which means that the steel plate position is abnormal.

[0085] The position of the steel plate is corrected. One embodiment is: if the correction range is within the set range (such as 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 (such as 29800mm).

[0086] In some embodiments, if there is no steel plate signal but the grating is lit, it proves that the signal of the steel plate is lost.

[0087] In some embodiments, inserting a new steel plate signal specifically includes: inputting the current position, length, thickness and other signals of the steel plate on the HMI, and after confirmation, the HMI will add a steel plate. For example, when there are 2 steel plates on the human-machine interface, if the operator wants to insert a steel plate information (the actual object must be 3), the current position, length, thickness and other signals of the steel plate need to be input on the HMI, and after confirmation, the HMI will add a steel plate.

[0088] Further, see Figure 6 After finding a steel plate that meets the first condition, it is necessary to determine whether the distance S between the last steel plate in the current furnace (i.e., the steel plate that entered the furnace before this steel plate) and the furnace entrance meets the requirement that this steel plate enters the furnace at high speed and decelerates to the process speed V. 工艺 If the required distance is met, the furnace entry procedure for the steel plate is started.

[0089] In one embodiment, S must meet the following conditions:

[0090]

[0091] Among them, V 入 is the speed of steel plate entering the furnace, l 入 It indicates the length of the steel plate currently ready to enter the furnace. S0 is the safety interval, which is set according to needs and is generally 1m-2m.

[0092] Based on the same inventive concept, the present invention also discloses a heat treatment unit steel plate entry into the furnace control device, comprising: a memory, a processor and a heat treatment unit steel plate entry into the furnace control program stored on the memory and executable on the processor, the heat treatment unit steel plate entry into the furnace control program being configured to implement the heat treatment unit steel plate entry into the furnace control method as described above.

[0093] 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 generally used to control the overall operation of the electronic device. In this embodiment, the processor is used to run the program code or process data stored in the memory, such as the program code of the heat treatment unit steel plate furnace control method.

[0094] Based on the same inventive concept, the present invention also discloses a storage medium, which stores a heat treatment unit steel plate entering the furnace control program, and the heat treatment unit steel plate entering the furnace control program is used to enable the processor to implement the heat treatment unit steel plate entering the furnace control method as described above when executing.

[0095] The memory includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), 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 can be an internal storage unit of the electronic device, such as a hard disk or memory of the electronic device. In other embodiments, the memory can also be an external storage device of the electronic device, such as a plug-in hard disk equipped on the electronic device, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), etc. Of course, the memory can also include both the internal storage unit of the electronic device and its external storage device. In this embodiment, the memory is generally used to store the operating method and various application software installed in the electronic device, such as the program code of the heat treatment unit steel plate furnace control method, etc. In addition, the memory can also be used to temporarily store various data that have been output or are to be output.

[0096] The above process is described in detail below through a specific example.

[0097] At the furnace entrance, gratings 1 to 3 are arranged in sequence, a total of 3 gratings, located before entering the furnace. Of course, the present invention is not limited to arranging 3 gratings before entering the furnace, but can also be 1 grating, 2 gratings, 4 gratings, etc. Preferably, 3 gratings are used.

[0098] When the grating detects a steel signal, it is compared with the position information of the steel plate here. If the grating position is within the steel plate 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.

[0099] Prevent unknown steel plates from entering the furnace: Specifically: grating signal processing, generally with a delay of 1 second; find the steel plate here, execute the loop, and find the steel plate that meets the position: if the tail position of the steel plate -1000 < photoelectric tube position < head position of the steel plate +1000, if a steel plate that meets this condition is found, it means that the grating signal is normal, then the normal furnace entry procedure is carried out, otherwise an alarm prompts: the steel plate signal or grating signal may be abnormal, and the furnace entry is stopped.

[0100] Embodiment 3

[0101] See also Figure 1 and Figure 2 The embodiment of the present invention provides a control method for a heat treatment unit to prevent abnormal discharge of steel plates, comprising the following steps:

[0102] Arrange steel plate detection elements before the heating furnace exit and before the heating furnace entrance;

[0103] When any steel plate detection element detects a steel signal, it searches for 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 meeting the first condition is found, an abnormal signal is returned and an alarm is sounded to indicate the abnormality. 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 meeting the first condition is found, and the steel plate detection element is a furnace-out detection, the furnace-out is stopped and the full-furnace swing mode is entered and the furnace-in is stopped.

[0107] In some embodiments, if a steel plate that meets the first condition is not found, the abnormal situation is confirmed, 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 steel plate detection element detection signal is processed.

[0108] Based on the same inventive concept, the present invention also discloses a control device for a heat treatment unit to prevent steel plates from being abnormally discharged from the furnace, comprising: a memory, a processor, and a heat treatment unit steel plate entry control program stored on the memory and executable on the processor, wherein the heat treatment unit steel plate entry control program is configured to implement the control method for the heat treatment unit to prevent steel plates from being abnormally discharged from the furnace as described above.

[0109] The above process is described in detail below through a specific example.

[0110] The control method for preventing abnormal discharge of steel plates provided by the present invention is specifically:

[0111] Prevent unknown steel plates from entering the furnace: Specifically: grating signal processing, generally with a delay of 1 second; find the steel plate here, execute the loop, and find the steel plate that meets the position: if the tail position of the steel plate -1000 ≤ photoelectric tube position ≤ the head position of the steel plate +1000, if a steel plate that meets this condition is found, it means that the grating signal is normal, then the normal furnace entry procedure is carried out, otherwise an alarm prompts: the steel plate signal or grating signal may be abnormal, and the furnace entry is stopped.

[0112] Prevent unknown steel plates from being discharged from the furnace. Specifically: grating signal processing, generally with a delay of 1 second; find the steel plate here, execute the loop, and find the steel plate that meets the position: if the tail position of the steel plate -1000 < photoelectric tube position < head position of the steel plate +1000, if a steel plate that meets this condition is found, it means that the grating signal is normal, and the normal discharge procedure is carried out. Otherwise, an alarm prompts: the steel plate signal or the grating signal may be abnormal, the discharge is stopped, the whole furnace is shaken, and the entry into the furnace is stopped.

[0113] The steel plate must meet the conditions to be discharged from the furnace, specifically: when the steel plate position is normal, the quenching machine is normal, the quenching machine water pressure is normal, the actual water flow of the nozzle reaches the set water flow, and the furnace roller table operates normally, the steel plate will be discharged from the furnace normally.

[0114] The invention has a remarkable effect after being put into use, can effectively prevent red steel from coming out of the furnace, greatly improves production efficiency, and at the same time makes the unit safer and more stable.

[0115] Embodiment 4

[0116] See also Figure 3 and Figure 4 The embodiment of the present invention provides a control method for a blowing device of a heat treatment unit, comprising the following steps:

[0117] Obtain the number n of steel plates of the unit (such as obtaining the number n of steel plates of the entire heat treatment unit);

[0118] Determine whether n is 0;

[0119] If n=0, the mark position corresponding to the blowing device is set to the first value;

[0120] If n>0, the loop is started: the loop variable i=1 is initialized, and it is determined whether the position of the i-th steel plate meets the first condition, which is that 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, determine whether i is less than n. If not, set the flag position corresponding to the blowing device to the first value and exit the loop. If yes, then i+1 is added to continue the determination of the next steel plate.

[0122] If the position of the i-th steel plate meets the first condition, the mark position corresponding to the blowing device is set to the second value, and the cycle ends;

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

[0124] When the flag bit corresponding to the blowing device is 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] The present invention can calculate the position of each steel plate by tracking the data block. The position information of each steel plate (the head and tail position of the steel plate) is calculated by a program. For example, the initial position of each steel plate is known, and the position corresponding to the time is obtained by integrating the speed and time. Of course, this position is theoretical, and the calculated position can also be corrected by a grating.

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

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

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

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

[0131] The control method of the heat treatment unit blowing device of the present invention is stable and reliable, has stability, safety, versatility, can reduce investment costs (no need to install gratings), has high program code execution efficiency, and occupies less resources.

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

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

[0135] The memory includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), 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 can be an internal storage unit of the electronic device, such as a hard disk or memory of the electronic device. In other embodiments, the memory can also be an external storage device of the electronic device, such as a plug-in hard disk equipped on the electronic device, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), etc. Of course, the memory can also include both the internal storage unit of the electronic device and its external storage device. In this embodiment, the memory is generally used to store the operating method and various application software installed in the electronic device, such as the program code of the control method of the injection device of the heat treatment unit, etc. In addition, the memory can also be used to temporarily store various types of data that have been output or are to be output.

[0136] The above process is described in detail below through a specific example.

[0137] The first blowing device is arranged between the shot blasting roller of the shot blasting machine and the furnace entry roller, the second blowing device is arranged between the furnace entry roller and the heating furnace entrance, and the third blowing device is arranged between the quenching machine and the furnace exit roller.

[0138] In some embodiments, a spray valve is arranged at the exit of the shot blasting machine, the entrance of the furnace, and the exit of the quenching machine, respectively. The valve is controlled by a PLC controller, and the valve is connected to the output module of the controller. There is no need to arrange a steel plate detection device before and after the valve, and the PLC automatically controls it according to the position of the steel plate.

[0139] The above process is described in detail below through a specific example.

[0140] The first blowing device is arranged between the shot blasting roller of the shot blasting machine and the furnace entry roller, the second blowing device is arranged between the furnace entry roller and the heating furnace entrance, and the third blowing device is arranged between the quenching machine and the furnace exit roller.

[0141] In some embodiments, a spray valve is arranged at the exit of the shot blasting machine, the entrance of the furnace, and the exit of the quenching machine, respectively. The valve is controlled by a PLC controller, and the valve is connected to the output module of the controller. There is no need to arrange a steel plate detection device before and after the valve, and the PLC automatically controls it according to the position of the steel plate.

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

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

[0144] The position coordinate of the spray device at the shot blasting outlet is spray[1]:=89000. This value may vary depending on the specific situation.

[0145] The position coordinates of the spray device at the furnace entrance are spray[2]:=110000. This value may vary depending on the specific situation.

[0146] The position coordinates of the spray device at the quenching machine outlet are spray[3]:=310000. This value may vary depending on the specific situation.

[0147] Output point:

[0148] The switch of the blowing device at the shot blasting outlet is Q1.0;

[0149] The switch of the blowing device at the furnace entrance is Q1.1;

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

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

[0152] Flags:

[0153] The switch of the shot blasting device at the exit is set_flag[1];

[0154] The switch of the blowing device at the furnace entrance is set_flag[2];

[0155] The switch of 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 set_flag[1]:

[0157] Get the number of steel plates n of the unit,

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

[0159] If n>0, start the loop: initialize the loop variable i=1, first determine whether the position of the i-th steel plate meets the following conditions: the tail position of the steel plate -1000 < the shot blasting outlet is 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, set the flag bit set_flag[1]=0. If i is less than n, then i=i+1, and continue to determine the next steel plate.

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

[0161] 3) The switch of the shot blasting device at the outlet is Q1.0. Control instructions:

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

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

[0164] The control method of the spray device of the heat treatment unit proposed by the present invention can effectively prevent the residual shot blasting on the steel plate, prevent the steel plate from bringing in oxygen, and prevent the residual moisture on the steel plate, thereby improving the production efficiency of the unit and the safety and stability of the unit. The present invention has a significant effect after being put into use, which can greatly reduce the workload of maintenance personnel, and at the same time accurately reduces the investment in the project.

[0165] Embodiment 5

[0166] An embodiment of the present invention also discloses a heat treatment unit steel plate out of furnace control system, including a controller, wherein the controller is provided with a heat treatment unit steel plate out of furnace control program, and the heat treatment unit steel plate out of furnace control program is configured to implement the heat treatment unit steel plate out of furnace control method as described in Example 1.

[0167] The controller may include a processor and a memory. A heat treatment unit steel plate out-of-furnace control program is stored in the memory and can be run on the processor.

[0168] Furthermore, the heat treatment unit steel plate out-of-furnace control system of the present invention further comprises an out-of-furnace steel plate detection element, which is connected to the controller and is used to transmit detected information to the controller. The out-of-furnace steel plate detection element is a grating.

[0169] Embodiment 6

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

[0171] See also Figure 3 and Figure 4 In some embodiments, the heat treatment unit control system of the present invention also includes at least one of a first blowing device located between the shot blasting roller of the shot blasting machine and the furnace entry roller, a second blowing device located between the furnace entry roller and the heating furnace entrance, and a third blowing device located between the quenching machine and the furnace exit 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 Example 4.

[0172] Embodiment 7

[0173] See also Figure 1 and Figure 2 The embodiment of the present invention further discloses a steel plate heat treatment production line, including a controller, a furnace-out steel plate detection element, and a furnace entry roller, a heating furnace, and a quenching machine arranged in sequence, wherein the furnace-out steel plate detection element is used to transmit the detected information to the controller, and the controller is provided with a heat treatment unit steel plate furnace-out control program, and the heat treatment unit steel plate furnace-out control program is configured to implement the heat treatment unit steel plate furnace-out control method as described in Example 1.

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

[0175] The controller is provided with a heat treatment unit steel plate furnace entry control program, and the heat treatment unit steel plate furnace entry control program is configured to implement the heat treatment unit steel plate furnace entry control method as described in the second embodiment.

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

[0177] The out-of-furnace steel plate detection element is arranged in front of the heating furnace exit.

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

[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 before the furnace entry roller.

[0180] See also 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 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 Example 4.

[0181] The first blowing device is located between the shot blasting roller of the shot blasting machine and the furnace entrance roller. The second blowing device is located between the furnace entrance roller and the heating furnace entrance. The third blowing device is located between the quenching machine and the furnace exit roller.

[0182] When the steel plate leaves the shot blasting machine, it is very easy to be attached with the shot, so a blowing device is added at its outlet to blow the shot off.

[0183] When the steel plate enters the furnace, it will bring air into the furnace, affecting the atmosphere in the furnace, thereby affecting the product quality and the service life of the furnace. Therefore, a blowing device is added at the entrance to prevent too much air from entering the furnace.

[0184] When the steel plate leaves the quenching machine, it is very easy to be attached with water droplets, so a blowing device is added at its outlet to blow off the water droplets.

[0185] In some embodiments, the first blowing device, the second blowing device, and the third blowing device include blowing valves, and the blowing valves 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 appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

[0188] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0189] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0190] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling the steel plate discharge from a heat treatment unit, characterized in that: The steps include: Acquire the signal of the out-of-furnace steel plate detection element; the out-of-furnace steel plate detection element is arranged in front of the heating furnace outlet; When the out-of-furnace steel plate detection element detects a steel signal, the position information of the out-of-furnace steel plate detection element is compared with the position information of each steel plate to find out whether there is a steel plate that meets the first condition: the tail position of the steel plate - A ≤ the position of the out-of-furnace 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-out procedure is started; If no steel plate meeting the first condition is found, an alarm will be issued to indicate an abnormality and the furnace will be stopped.

2. The method for controlling the steel plate discharge from a heat treatment unit according to claim 1, characterized in that: When the alarm prompts an abnormality, the furnace unloading stops and the whole furnace swing mode is entered and the furnace loading stops.

3. The method for controlling the steel plate out of a heat treatment unit according to claim 1, characterized in that: After finding a steel plate that meets the first condition, it is necessary to determine whether the steel plate meets the furnace discharge condition. If so, the furnace discharge procedure of the steel plate is started; When the steel plate is in normal position, the quenching machine is normal, the water pressure of the quenching machine is normal, the actual water flow of the nozzle reaches the set water flow, and the furnace roller table operates normally, it is considered that the steel plate meets the furnace discharge conditions.

4. The method for controlling the steel plate out of a heat treatment unit according to claim 1, characterized in that: There are multiple out-of-furnace steel plate detection elements, and the multiple out-of-furnace steel plate detection elements are distributed at intervals along the running direction of the steel plate.

5. The method for controlling the steel plate out of a heat treatment unit according to claim 1, characterized in that: If no steel plate meeting the first condition is found, the method also includes the following steps: confirming the abnormal situation; if the steel plate position is abnormal, correcting the steel plate position; if the steel plate signal is lost, inserting a new steel plate signal; if the out-of-furnace steel plate detection element is abnormal, processing the out-of-furnace steel plate detection element detection signal.

6. A heat treatment unit steel plate out of furnace control system, characterized in that: It comprises a controller, in which a heat treatment unit steel plate out-of-furnace control program is provided, and the heat treatment unit steel plate out-of-furnace control program is configured to implement the heat treatment unit steel plate out-of-furnace control method as claimed in any one of claims 1 to 5.

7. The heat treatment unit steel plate discharge control system according to claim 6, characterized in that: It also includes a furnace-out steel plate detection element, which is connected to the controller and is used to transmit detected information to the controller.

8. A steel plate heat treatment production line, characterized in that: It comprises a heating furnace, a controller and a furnace-out steel plate detection element, wherein the furnace-out steel plate detection element is used to transmit the detected information to the controller, wherein the controller is provided with a heat treatment unit steel plate furnace-out control program, and the heat treatment unit steel plate furnace-out control program is configured to implement the heat treatment unit steel plate furnace-out control method as described in any one of claims 1 to 5.

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