CN116380269A - Billet temperature detection system - Google Patents

Billet temperature detection system Download PDF

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Publication number
CN116380269A
CN116380269A CN202310122874.3A CN202310122874A CN116380269A CN 116380269 A CN116380269 A CN 116380269A CN 202310122874 A CN202310122874 A CN 202310122874A CN 116380269 A CN116380269 A CN 116380269A
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China
Prior art keywords
temperature
billet
heating furnace
heat
thermocouple
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Pending
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CN202310122874.3A
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Chinese (zh)
Inventor
郑建忠
旋石婵
陈奕璇
霍晓珊
陈翔
黄飞戬
张志标
陈克武
柴辉
余游
刘钦伟
黄晟
廖楚金
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Guangdong Zhongnan Iron and Steel Co Ltd
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Guangdong Zhongnan Iron and Steel Co Ltd
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Application filed by Guangdong Zhongnan Iron and Steel Co Ltd filed Critical Guangdong Zhongnan Iron and Steel Co Ltd
Priority to CN202310122874.3A priority Critical patent/CN116380269A/en
Publication of CN116380269A publication Critical patent/CN116380269A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/70—Furnaces for ingots, i.e. soaking pits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The invention discloses a steel billet temperature detection system, which comprises: the device comprises a plurality of thermocouples, a data collector and a controller, wherein the thermocouples are arranged in a heat-resistant cushion block of a heating furnace at intervals and are used for collecting temperature signals when a steel billet is placed on the heat-resistant cushion block, the data collector is connected with the thermocouples and is used for converting the temperature signals into temperature values and sending the temperature values to the controller, and the controller is used for constructing a temperature change model of the steel billet when the steel billet is heated in the heating furnace according to the temperature values. The steel billet can be placed on the heat-resistant cushion block in the heating process, the thermocouples are fixedly arranged in the heat-resistant cushion block, the bottom temperature of the steel billet can be stably measured, and secondly, the thermocouples are distributed in the heat-resistant cushion block, so that the temperature of the steel billet can be continuously and stably detected when the steel billet horizontally moves on the heat-resistant cushion block, the tracking of the real temperature change of the steel billet is realized, the temperature change model of the steel billet when being heated in the heating furnace is built according to the temperature value by the controller, and the temperature change rule of the steel billet can be obtained.

Description

Billet temperature detection system
Technical Field
The invention relates to the technical field of billet heating, in particular to a billet temperature detection system.
Background
The measurement modes of the billet temperature of the existing heating furnace mainly comprise two modes:
1. indirect measurement method: the temperature of the atmosphere of the furnace gas (the equilibrium temperature between the furnace gas and the furnace wall billet) in the heating furnace is measured by a thermocouple and used as a reference of the billet temperature.
The indirect measurement method is that thermocouples are arranged on the side surfaces and the top of the preheating section, the heating section and the soaking section of the heating furnace, and as the billet is in the continuous moving process in the heating furnace, the temperature of the furnace gas atmosphere in the heating furnace is related to the opening degree of the burner, the air quantity, the insertion depth of the thermocouples and the like, the indirect measurement method is difficult to reflect the real temperature of the billet, and the real temperature distribution data chart of the billet in the furnace is difficult to construct.
2. Measuring the surface temperature of the steel billet: the surface temperature of the billet is measured by non-contact means such as an infrared thermometer.
The method for measuring the surface temperature of the billet needs to overcome the defect that the high-temperature gas in the furnace and various interferences affect the measurement accuracy, the measuring method generally stretches into a measuring probe to measure through a steel tapping hole or other observation holes to the heating furnace, the measuring points are few, and the real temperature change of the billet in the furnace is difficult to track.
Disclosure of Invention
The invention provides a steel billet temperature detection system, which aims to solve the problem that the actual temperature of a steel billet is difficult to reflect due to different measurement factors or fewer temperature measurement points when the temperature of the steel billet is measured.
The invention provides a steel billet temperature detection system, which comprises: a plurality of thermocouples, a data collector and a controller,
the thermocouples are arranged in a heat-resistant cushion block of the heating furnace at intervals and are used for collecting temperature signals when billets are placed on the heat-resistant cushion block;
the data acquisition device is connected with the thermocouple and used for converting the temperature signal into a temperature value and sending the temperature value to the controller;
the controller is used for constructing a temperature change model of the billet when the billet is heated in the heating furnace according to the temperature value.
The billet temperature detection system provided by the embodiment of the invention comprises: the device comprises a plurality of thermocouples, a data collector and a controller, wherein the thermocouples are arranged in a heat-resistant cushion block of a heating furnace at intervals and are used for collecting temperature signals when a steel billet is placed on the heat-resistant cushion block, the data collector is connected with the thermocouples and is used for converting the temperature signals into temperature values and sending the temperature values to the controller, and the controller is used for constructing a temperature change model of the steel billet when the steel billet is heated in the heating furnace according to the temperature values. The steel billet can be placed on the heat-resistant cushion block in the heating process, the thermocouples are fixedly arranged in the heat-resistant cushion block, the bottom temperature of the steel billet can be stably measured, and secondly, the thermocouples are distributed in the heat-resistant cushion block, so that the temperature of the steel billet can be continuously and stably detected when the steel billet horizontally moves on the heat-resistant cushion block, the tracking of the real temperature change of the steel billet is realized, the temperature change model of the steel billet when being heated in the heating furnace is built according to the temperature value by the controller, and the temperature change rule of the steel billet can be obtained.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a steel billet temperature detection system provided in an embodiment of the present invention;
FIG. 2 is a top view of an insulation blanket according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a temperature variation curve according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Fig. 1 is a flowchart of a steel billet temperature detection system according to an embodiment of the present invention, where the embodiment is applicable to a case of temperature of a steel billet in a heating furnace, and the heating furnace in the embodiment is a step-type heating furnace. As shown in fig. 1, the heating furnace comprises a furnace bottom 14, fixed beam columns 13, fixed beams 12 and heat-resistant cushion blocks 11, wherein the heat-resistant cushion blocks 11 are positioned on the fixed beams 12 of the heating furnace. The process section of the billet 40 when heated in the heating furnace is divided into a preheating section, a heating section and a soaking section, different process sections have different specific equipment and different equipment control parameters, when the billet 40 needs to enter the process section or the process section is replaced, the billet needs to horizontally move above the fixed beam 12 to enter the different process sections, and when the billet 40 is placed at the corresponding position of the target process section, the billet is lowered and placed on the heat-resistant cushion block 11 above the fixed beam 12. Specifically, when the billet 40 needs to enter or be replaced in the process section, the billet 40 is lifted to a certain height by a movable beam (not shown) in the heating furnace, moved in the horizontal direction for a certain distance, placed on the heat-resistant cushion block 11, and then heated in the process section.
The billet temperature detection system provided by the embodiment of the invention comprises: the device comprises a plurality of thermocouples 10, a data collector 20 and a controller 30, wherein the thermocouples 10 are arranged in a heat-resistant cushion block 11 of a heating furnace at intervals, the data collector 20 is connected with the thermocouples 10, and the controller 30 is connected with the data collector 20.
The thermocouple is used for collecting temperature signals when the billet is placed on the heat-resistant cushion block. The working principle of the thermocouple is as follows: two different metal conductors are welded together to form a closed loop, and if a temperature difference is generated at the welding end, a thermal electromotive force is generated in the loop. If the other end (considered as the reference end) temperature is kept constant (typically 0 ℃), the thermal electromotive force of the loop becomes a single-valued function of the measured end temperature. This element for measuring temperature by measuring thermoelectromotive force, i.e., two paired metal conductors, is called a thermocouple. The thermoelectric potential generated by the thermocouple is only related to the thermoelectric electrode material and the temperature difference between two ends of the thermoelectric electrode material, and is not related to the length, the diameter and the like of the thermoelectric electrode.
The detection end of the thermocouple is connected with the heat-resistant cushion block, when the billet is placed on the heat-resistant cushion block, the heat-resistant cushion block conducts heat and transfers heat to the detection end of the thermocouple, and a temperature difference is formed between the detection end of the thermocouple and the other end (regarded as a reference end) of the thermocouple, namely thermoelectromotive force is generated and is connected to the data collector through a data wire.
The data collector is used for converting the temperature signal into a temperature value and sending the temperature value to the controller. The data collector corresponds to a signal converter, converts the temperature signal of the thermocouple into a machine-recognizable temperature value (digital signal) and sends the temperature value to the controller.
The controller is used for constructing a temperature change model of the billet when heated in the heating furnace according to the temperature value. The controller is a calculation and control center of the whole system of the heating furnace, and thermocouples are distributed on the heat-resistant cushion blocks, namely temperature signals of billets at different times can be acquired, so that the controller end can acquire temperature values of the billets at different times, further a temperature change model of the billets when heated in the heating furnace can be constructed, and specifically, temperature and time data can be drawn in a graph to obtain the temperature change model.
The controller end can be provided with a display for displaying the temperature value sent by the data acquisition device and the constructed temperature change model, so that the operator can conveniently check the temperature change model.
The billet temperature detection system provided by the embodiment of the invention comprises: the device comprises a plurality of thermocouples, a data collector and a controller, wherein the thermocouples are arranged in a heat-resistant cushion block of a heating furnace at intervals and are used for collecting temperature signals when a steel billet is placed on the heat-resistant cushion block, the data collector is connected with the thermocouples and is used for converting the temperature signals into temperature values and sending the temperature values to the controller, and the controller is used for constructing a temperature change model of the steel billet when the steel billet is heated in the heating furnace according to the temperature values. The steel billet can be placed on the heat-resistant cushion block in the heating process, the thermocouples are fixedly arranged in the heat-resistant cushion block, the bottom temperature of the steel billet can be stably measured, and secondly, the thermocouples are distributed in the heat-resistant cushion block, so that the temperature of the steel billet can be continuously and stably detected when the steel billet horizontally moves on the heat-resistant cushion block, the tracking of the real temperature change of the steel billet is realized, the temperature change model of the steel billet when being heated in the heating furnace is built according to the temperature value by the controller, and the temperature change rule of the steel billet can be obtained.
In an alternative embodiment of the invention, the thermocouple of the embodiment is an armored thermocouple, the material of the armored thermocouple protection tube adopts nickel-based superalloy, and the thermocouple core adopts platinum-rhodium 10-platinum. The working temperature of the nickel-based superalloy armored thermocouple can reach 1300 ℃, the thermocouple is laid and installed along the outer wall of the water beam pipe in the heating furnace, the temperature of water Liang Waibi is about 130 ℃ in general, the thermocouple is firstly insulated by a layer of fiber cotton, and the outside is protected by castable, so that the armored thermocouple meets the condition of long-term working at the temperature below 1300 ℃ in the heating furnace. The thermocouple passes through the bottom of the heating furnace and is connected with the heat-resistant cushion block through the upright post of the fixed beam and the hollow part of the fixed beam. When the thermocouple is horizontally arranged in the fixed beam, the thermocouple is laid at the bottom of the fixed beam.
In an alternative embodiment of the present invention, as shown in fig. 1, a heat resistant pad 11 provided with a thermocouple 10 includes a base 112, a heat insulating pad (not shown) and a heat conducting pad 111, the heat insulating pad being located between the base 112 and the heat conducting pad 111. It should be noted that, whether the heat-resistant pad 11 is provided with the thermocouple 10 or not, the upper surfaces of all the heat-resistant pads 11 are flush, so that the billet 40 can be placed on the heat-resistant pad 11 smoothly.
The heat conducting cushion block has the characteristic of high heat conductivity, and is convenient for transmitting the heat of the steel billet to the thermocouple for temperature signal acquisition, and for example, the heat conducting cushion block can be a silicon nitride ceramic cushion block. The silicon nitride ceramic cushion block has the advantages of excellent heat conduction performance, high temperature resistance, oxidation resistance, high hardness, wear resistance and the like. The silicon nitride ceramic has excellent heat conduction performance, the maximum heat conduction performance can reach 155W/mK, the thermocouple is arranged in the silicon nitride ceramic cushion block, and the billet steel in the walking furnace is supported on the fixed beam for 70% -80% of the time, so that the temperature of the billet steel can be conducted to the thermocouple through the silicon nitride ceramic cushion block, and the generation of the billet steel black mark problem can be eliminated due to the heat insulation effect of the heat insulation cushion block.
The insulation blanket has the property of low thermal conductivity and may be, for example, a nanofiber insulation blanket.
The base may be a cobalt-based alloy base, for example, the cobalt-based alloy may be Co-50, co-40, co-20.
According to the furnace temperature distribution, the process section of the hearth along the length direction can be divided into a preheating section, a heating section and a soaking section. The heating section is a main heat supply section, the temperature of furnace gas is higher, so that quick heating is realized, the soaking section is positioned at the discharge end, the temperature difference between the furnace gas and the temperature of metal materials is small, the temperature uniformity of the section of a furnace charge blank is ensured, the requirements of different process sections on the materials and the performances of the base and the equipment cost are combined, the cobalt-based alloy base of Co-50 can be used for the soaking section, and the cobalt-based alloy base of Co-40 can be used for the heating section.
In an alternative embodiment of the invention, thermocouple mounting holes are provided on the base, the insulating spacer and the thermally conductive pad. One end of the thermocouple is fixedly connected with the heat conduction cushion block through the base, the heat insulation gasket and the thermocouple mounting hole on the heat conduction cushion block, and the other end of the thermocouple penetrates through the bottom of the heating furnace to be connected with the data acquisition device.
Taking the heat insulation gasket as an example, as shown in fig. 2, fig. 2 is a plan view of the heat insulation gasket, and thermocouple mounting holes 113 are provided in the heat insulation gasket.
The thermocouple mounting holes on the base, the heat insulation gasket and the heat conduction cushion block are identical in size and are arranged in an aligned mode, so that the thermocouple can be connected with the heat conduction cushion block through the three thermocouple mounting holes directly. It should be noted that, the thermocouple mounting holes on the base and the heat insulation pad are through holes, and the thermocouple mounting holes on the heat conduction pad are not required to be through holes, so long as the heat conduction pad can normally transmit energy to the thermocouple. The thermocouple passes through the thermocouple mounting hole on the base, the heat insulation gasket with low thermal conductivity is placed on the upper portion of the base, the mounting positioning groove of the heat conduction cushion block is further formed in the upper portion of the base, the heat conduction cushion block is inserted along the mounting positioning groove of the base, and the thermocouple is inserted into the bottom of the thermocouple mounting hole of the heat conduction cushion block.
For the armoured thermocouple installed in the heating section and the soaking section, a high-alumina or corundum protective sleeve is additionally installed at the position which is more than 1 meter away from the upright post of the fixed beam and is below the base, and the thermocouple is laid along the fixed beam and the upright post of the fixed beam and is fixed at a proper position. After the thermocouple is installed, the fixed beam and the upright post are wrapped with fiber cotton and then are cast by casting materials, and the part below the cobalt-based alloy base of the combined heat-resistant cushion block is covered by the casting materials.
The high-alumina or corundum protective sleeve can work in an oxidizing environment at 1500-1600 ℃ for a long time, and the thermocouple can be prevented from being exposed due to falling of casting materials.
In an alternative embodiment of the invention, the horizontal spacing of adjacent thermocouples is equal to an integer multiple of the horizontal movement step of the moving beam in the furnace. L is the horizontal moving step length of the movable beam in the heating furnace, n is the number of steps of the movable beam, and then the horizontal distance between two adjacent thermocouples is nL, and n is a positive integer.
The first thermocouple is required to be positioned at the initial position when the billet enters the heating furnace, and the temperature signal of the billet can be acquired through the thermocouple only when the movable beam drives the billet to horizontally move for a certain distance and is placed on the heat-resistant cushion block.
In an alternative embodiment of the invention, the horizontal moving step length and the billet width of the movable beam in the heating furnace satisfy the relation: nL/k=n,
wherein L is the horizontal movement step length of a movable beam in the heating furnace, K is the width of a steel billet, N is the number of steps of the movable beam, and N and N are positive integers. The horizontal moving distance of the movable beam is an integral multiple of the width of the steel billet, so that thermocouples on the heat-resistant cushion blocks before and after the movement correspond to the same positions of the steel billet, and the condition consistency of temperature detection is ensured. Assuming that before moving, the thermocouple corresponds to the center position in the width direction of the steel billet, the width of the steel billet is 1.5m, the horizontal moving step length of the movable beam is 2m, and when the moving step number is 3 steps, the horizontal moving distance of the steel billet is 6m, so that nL/k=n is satisfied, and N is a positive integer. At this time, n=4, and when the billet moves and drops onto the heat-resistant cushion block, the thermocouple still exists at the center position of the billet in the width direction, that is, before and after the movement, the temperature signal can be acquired at the same position of the billet, so that errors caused by temperature differences at different positions are avoided.
In order to clearly explain the construction process of the temperature change model in this embodiment, the following example will be used for explanation:
assuming that the step size of the horizontal movement of the walking beam furnace is L, the distribution distance of the thermocouple measurement points on the fixed beam is set to NL, n=1, 2,3,4. Assuming that the width of the billet entering the furnace is K, the horizontal moving distance of the heating furnace is nL, and n is the number of steps. If the position of a certain billet a is set to be at the position of the first temperature detection point, and if the horizontal movement distance nL of the heating furnace is set, when the nL/k=n condition is satisfied, the sequence number of the thermocouple at the temperature measurement point corresponding to the billet a at this time is N. According to this setting method, if the steel billet entering the furnace is A, B and c, the steel billet A, B and c can be obtained according to the horizontal movement distance of the walking beam of the heating furnace, respectively, the temperature values A1, B1 and c1 before the walking beam moves, the temperature values A2, B2 and C2. after the steel billet moves, and according to the steel billet temperature data distribution values in different periods, the steel billet in the heating furnace can be changed with time, and the temperature change model in the heating furnace can be established.
In an alternative embodiment of the invention, the controller comprises:
the temperature distribution data determining module is used for determining temperature distribution data of the steel billet in different time, different process sections and different horizontal moving distances according to the temperature data;
the model generation module is used for establishing a temperature change model of the billet when the billet is heated in the heating furnace according to the acquired temperature distribution data of the preset number of billets.
In an alternative example of the present invention, different process sections of the heating furnace correspond to different thermocouples, and the temperature distribution data determining module includes:
and the time arrangement sub-module is used for arranging the temperature values according to the acquisition time aiming at each billet to obtain first distribution data. The thermocouples are distributed on the heat-resistant cushion blocks at intervals, the time sequence of collecting the temperature signals of the steel billets by the thermocouples is related to the position of the heat-resistant cushion blocks, the thermocouples at the front positions can collect the temperature signals of the steel billets first, and the thermocouples at the rear positions can collect later time. Typically, the sequence of temperature values is associated with the sequence of thermocouples (serial numbers), e.g., the 1 st temperature signal is collected by the 1 st thermocouple, the 2 nd temperature signal is collected by the 2 nd thermocouple …, and so on.
And the process section arrangement sub-module is used for marking the process section of the first distribution data according to the thermocouple corresponding to the process section of the heating furnace to obtain second distribution data. For example, the numbers of thermocouples corresponding to the heating sections are respectively 5, 6, 7 and 8, and the temperature values corresponding to the thermocouples with the numbers of 5, 6, 7 and 8 in the first distribution data are added with a heating section mark.
And the distance marking sub-module is used for horizontally moving the distance marking on the second distribution data according to the installation position of the thermocouple in the heating furnace to obtain temperature distribution data of the billet in different time, different process sections and different horizontal moving distances. The horizontal moving distance of the movable beam can be monitored, and the current process section can be judged according to the horizontal moving distance of the movable beam, for example, when the horizontal moving distance is 2m, the current billet can be determined to enter the preheating section, so that the heating equipment of the preheating section can be controlled.
In the embodiment, the time, the process section and the horizontal movement distance are marked on the temperature data, so that the temperature data information is diversified, and a more perfect temperature change model is constructed.
In an alternative embodiment of the invention, the model building module comprises:
the initial model construction module is used for constructing an initial model, and the variable parameters of the initial model comprise time, a process section, a horizontal movement distance and temperature;
the model training sub-module is used for inputting the preset quantity of temperature distribution data into the initial model and fitting the initial model to obtain a temperature change model.
The temperature change model is a fitted temperature change curve, and as shown in fig. 3, fig. 3 is a temperature curve of different billets at different times, different process sections and different horizontal movement distances, that is, a temperature change curve before fitting, and the time-temperature change rule of each process section can be obtained by carrying out sectional fitting on the data according to each process section, so that a fitted temperature change curve is obtained, and the temperature change model is obtained. It should be noted that the temperature curve of fig. 3 is only for explanation, and the data in the figure is not a limitation of the present invention, and the curve should be set according to the equipment, parameters, temperature data, etc. of the heating furnace in the actual production process.
In an alternative embodiment of the invention, the controller further comprises:
and the parameter control module is used for controlling the temperature of the atmosphere of the internal furnace gas of the heating furnace, the opening degree of the burner and the air quantity according to the temperature change model. The controller guides the control parameters of the heating furnace in the heating process of the steel billet according to the temperature change rule of the steel billet in the heating furnace, thereby facilitating automatic production.
In an alternative embodiment of the invention, the controller further comprises: and the model correction module is used for correcting the constructed temperature change model according to the new temperature value sent by the data acquisition unit. The more the data, the higher the accuracy and the higher the adaptability of the temperature change model, so that new temperature data can be continuously accumulated to correct the temperature change model.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (10)

1. A billet temperature detection system, comprising: a plurality of thermocouples, a data collector and a controller,
the thermocouples are arranged in a heat-resistant cushion block of the heating furnace at intervals and are used for collecting temperature signals when billets are placed on the heat-resistant cushion block;
the data acquisition device is connected with the thermocouple and used for converting the temperature signal into a temperature value and sending the temperature value to the controller;
the controller is used for constructing a temperature change model of the billet when the billet is heated in the heating furnace according to the temperature value.
2. The billet temperature sensing system of claim 1 wherein the heat resistant pad provided with the thermocouple comprises a base, a thermally insulating pad and a thermally conductive pad, the thermally insulating pad being located between the base and the thermally conductive pad.
3. The billet temperature sensing system of claim 2 wherein thermocouple mounting holes are provided on each of said base, said insulating pad and said thermally conductive pad;
one end of the thermocouple is fixedly connected with the heat conduction cushion block through the base, the heat insulation gasket and a thermocouple mounting hole on the heat conduction cushion block, and the other end of the thermocouple penetrates through the bottom of the heating furnace to be connected with the data acquisition device.
4. The billet temperature sensing system of claim 1 wherein the horizontal spacing of adjacent ones of said thermocouples is equal to an integer multiple of the horizontal displacement step of the movable beam in said furnace.
5. The billet temperature detection system of claim 4 wherein the horizontal movement step length and the billet width of the movable beam in the heating furnace satisfy the relation: nL/k=n,
l is the horizontal movement step length of a movable beam in the heating furnace, K is the width of the steel billet, N is the number of steps of the movable beam, and N and N are positive integers.
6. The billet temperature sensing system of claim 4 wherein the controller comprises:
the temperature distribution data determining module is used for determining temperature distribution data of the steel billet at different times, different process sections and different horizontal movement distances according to the temperature data;
the model generation module is used for establishing a temperature change model of the billet when the billet is heated in the heating furnace according to the acquired temperature distribution data of the preset number of billets.
7. The billet temperature sensing system of claim 6 wherein different process segments of the heating furnace correspond to different thermocouples, the temperature profile data determination module comprising:
the time arrangement sub-module is used for arranging the temperature values according to the acquisition time aiming at each billet to obtain first distribution data;
the process section arrangement sub-module is used for marking the process section of the first distribution data according to the thermocouple corresponding to the process section of the heating furnace to obtain second distribution data;
and the distance marking sub-module is used for marking the horizontal movement distance of the second distribution data according to the installation position of the thermocouple in the heating furnace to obtain temperature distribution data of the billet in different time, different process sections and different horizontal movement distances.
8. The billet temperature detection system of claim 7 wherein the model building module comprises:
the initial model construction module is used for constructing an initial model, and the variable parameters of the initial model comprise time, a process section, a horizontal movement distance and temperature;
and the model training sub-module is used for inputting the preset quantity of the temperature distribution data into the initial model and fitting to obtain a temperature change model.
9. The billet temperature detection system according to any of claims 1-8, wherein the controller further comprises:
and the parameter control module is used for controlling the temperature of the internal furnace gas atmosphere of the heating furnace, the opening degree of the burner and the air quantity according to the temperature change model.
10. The billet temperature detection system according to any of claims 1-8, wherein the controller further comprises:
and the model correction module is used for correcting the constructed temperature change model according to the new temperature value sent by the data acquisition unit.
CN202310122874.3A 2023-02-14 2023-02-14 Billet temperature detection system Pending CN116380269A (en)

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Application Number Priority Date Filing Date Title
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CN116380269A true CN116380269A (en) 2023-07-04

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