Automatic temperature measuring system and temperature measuring method for molten steel in steel ladle casting process

Abstract

The invention discloses an automatic temperature measuring system and method for molten steel in the steel ladle casting process. Relates to the technical field of steel smelting. The system comprises a temperature measuring device, a control system and a data processing system, wherein the temperature measuring device is composed of a device frame body, a releasing and recycling mechanism, a carrying frame and a temperature measuring assembly; the temperature measuring assembly is provided with an inverted-frustum-shaped central immersion part, symmetrically-arranged floating bodies, a built-in heat conduction assembly and detachable sensor interfaces, and direct temperature measuring and indirect temperature measuring modes are achieved through switching of the sensor interfaces. The method adopts a mixed temperature measurement strategy of small-amount direct temperature measurement and large-amount rapid indirect temperature measurement, and is divided into a standard data establishment stage, a correction algorithm establishment stage and an actual application stage. The system is also provided with an automatic release mechanism, adopts a dual temperature measurement cross validation technology, and dynamically adjusts indirect temperature measurement and infrared temperature measurement weights through an intelligent weight distribution algorithm. The contradiction between precision and equipment durability in traditional molten steel temperature measurement is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel smelting, in particular to a molten steel automatic temperature measurement system and method in a ladle casting process, and more particularly to a mixed temperature measurement strategy based on comparison correction, which realizes high-precision automatic monitoring technology of molten steel temperature through the combination of direct temperature measurement and indirect temperature measurement. BACKGROUND

[0002] In the ladle casting process, excessively high molten steel temperature can cause intensified oxidation of molten steel and increased loss of refractory materials, and excessively low molten steel temperature can cause solidification of molten steel and affect the continuity of casting. Therefore, real-time and accurate monitoring of molten steel temperature is of great significance to ensure the quality of steel, improve production efficiency, and reduce production cost.

[0003] Traditional molten steel temperature measurement methods mainly include contact type temperature measurement and non-contact type temperature measurement. The contact type temperature measurement usually adopts a disposable thermocouple directly inserted into molten steel for temperature measurement. This method has high temperature measurement accuracy, which can reach ±1-2℃, but has problems such as large equipment consumption, high cost, and inability to continuously measure temperature. A thermocouple is consumed each time the temperature is measured, and the operating cost is extremely high in large-scale production. The non-contact type temperature measurement mainly uses infrared temperature measurement technology. Although it can realize continuous temperature measurement without consuming temperature measurement elements, it is affected by factors such as molten steel surface oxidation film, environmental radiation, and atmospheric attenuation, and has low temperature measurement accuracy, usually within ±5-10℃, which is difficult to meet the requirements of accurate control.

[0004] In the prior art, Chinese patent document CN116242498A discloses a molten steel tank wireless continuous temperature measurement system and a molten steel temperature prediction method. The system includes a temperature sensor arranged on the side wall of the molten steel tank, the temperature measurement end of which penetrates through the side wall and communicates with the inside of the molten steel tank, for measuring the tank environment temperature or the molten steel temperature; a wireless signal transmitter connected with the temperature sensor for transmitting temperature data signals; a wireless signal receiver for receiving temperature data signals; and a temperature analysis functional module connected with the wireless signal receiver for collecting temperature data and performing regression analysis. The system realizes continuous temperature measurement by fixedly installing the temperature sensor on the side wall of the molten steel tank, which to some extent solves the problem that the traditional temperature measurement method cannot continuously monitor.

[0005] However, the above prior art still has the following technical defects and deficiencies: First, the contradiction between temperature measurement accuracy and equipment durability is prominent. Although the existing contact type temperature measurement has high accuracy, it consumes a large amount of equipment, and a temperature measurement element such as a thermocouple is consumed each time the temperature is measured, resulting in high operating cost. While the non-contact type temperature measurement can be reused, it has low accuracy and cannot meet the demand of accurate control.

[0006] Second, the temperature measurement consistency is difficult to guarantee. The surface state of molten steel is complex and changeable, and factors such as uneven thickness of the oxidation film, fluctuation of molten steel level, and change of environmental temperature will affect the accuracy and repeatability of the temperature measurement results. The existing technology lacks effective means to guarantee the consistency of the conditions at each temperature measurement, resulting in insufficient reliability and stability of the temperature measurement results.

[0007] Third, the intelligent degree is not high. The existing temperature measurement system mostly adopts manual control or simple program control, and cannot automatically adjust the temperature measurement time and strategy according to the actual state of the ladle casting process, lacks intelligent linkage mechanism with the casting process, and affects the timeliness and accuracy of the temperature measurement.

[0008] Fourth, there is a lack of effective precision compensation mechanism. In the existing technology, although the indirect temperature measurement method can reduce equipment consumption, due to the lack of comparison correction mechanism with high-precision direct temperature measurement, the temperature measurement error is large, and it is difficult to meet the precision requirements of production control.

[0009] Fifth, the adaptability and reliability need to be improved. The environmental conditions in the ladle casting process are harsh, and factors such as high temperature, dust, and electromagnetic interference pose a severe challenge to the reliability of the temperature measurement equipment. The existing technology has deficiencies in adaptability and long-term stability in harsh environments, high maintenance cost, and affects the continuity of production.

[0010] Therefore, it is necessary to develop an automatic molten steel temperature measurement system and method that can guarantee temperature measurement accuracy, reduce equipment consumption, and have intelligent control capability and good environmental adaptability, to meet the urgent needs of modern steel industry for accurate monitoring of molten steel temperature. SUMMARY

[0011] To achieve the above invention purposes, the present application provides the following technical solutions: In a first aspect, the present application provides an automatic molten steel temperature measurement system based on comparison correction for ladle casting process, comprising: A temperature measurement device as a mechanical execution unit of the system, comprising: a device frame body with a vertical main body part and a horizontal cantilever part, adopting an inverted L-shaped frame structure to provide mechanical support for the whole device; a release and recovery mechanism with a winding power assembly, a guide wheel set and a pulling transmission member, realizing the reciprocating motion of the temperature measurement assembly between the standby position and the temperature measurement position; a carrier as a temperature measurement assembly carrying platform; a temperature measurement assembly with a central immersion part, a float, a heat conduction assembly and a detachable sensor interface.

[0012] The central immersion part is located at the geometric center of the temperature measuring assembly, in an inverted frustum structure, with a liquid inlet at the bottom, and a chamfered transition design at the opening edge to ensure the rapid inflow and complete outflow of the molten steel; the float is composed of two symmetrical structures, fixed on both sides of the central immersion part to provide buoyancy support, ensuring that the entire temperature measuring assembly remains in a stable floating state in the molten steel; the heat conduction assembly is built-in the immersion part, including a heat conduction block and an isolation cavity, as the core functional component of indirect temperature measurement; the detachable sensor interface is provided on the heat conduction block, used to switch between direct and indirect temperature measurement, wherein direct temperature measurement is measured by directly contacting the molten steel with a thermocouple, and indirect temperature measurement is measured by heat conduction between the heat conduction block and the molten steel.

[0013] The control system is responsible for the automatic control of the entire temperature measurement process, including a motion control module, a sensor management module, a safety monitoring module, and a human-computer interaction module.

[0014] The data processing system realizes the collection, correction, and output of temperature data, including a data collection module, a comparative correction algorithm module, a data storage module, and a communication interface module.

[0015] The system adopts a hybrid temperature measurement strategy of "a small amount of direct temperature measurement + a large amount of rapid indirect temperature measurement", and through the establishment of a comparative correction model between the two temperature measurement methods, the accuracy of indirect temperature measurement is improved.

[0016] Preferably, the release and recovery mechanism further includes a one-way limiting chain wheel and a pressing locking mechanism, and the pulling transmission member adopts a chain-cable combined structure, when the ladle is tilted to a preset angle, the separation torque generated by gravity causes the pressing locking mechanism to automatically disengage, realizing the automatic release and descent of the temperature measuring assembly, forming an intelligent automatic release mechanism linked with the inclined state during the ladle casting process.

[0017] Preferably, the system further includes an infrared temperature measurement module and a molten steel surface state monitoring system installed on the carrier, and the data processing system has an intelligent weight distribution algorithm, which dynamically adjusts the weight coefficients of indirect temperature measurement and infrared temperature measurement according to the state of the molten steel surface oxide film, forming a temperature measurement system of "indirect heat conduction temperature measurement + infrared temperature measurement + double cross-validation".

[0018] Preferably, the central immersion part is an inverted rectangular frustum container with a chamfered transition at the edge of the liquid inlet, made of stainless steel or refractory ceramic material, to ensure the structural stability and service life in high temperature environment.

[0019] In the second aspect, the present application provides an automatic molten steel temperature measurement method based on comparative correction, which is implemented by using the above-mentioned temperature measurement device, including the following steps: The standard data establishment stage: in the calibration mode, the thermocouple is installed on the heat conducting block of the heat conducting assembly through the detachable sensor interface, the release and recovery mechanism is controlled to make the temperature measuring assembly descend to the surface of the molten steel, the molten steel flows into the isolation cavity through the liquid inlet of the central immersion part, the thermocouple probe directly contacts the molten steel for direct temperature measurement, and the heat conduction between the heat conducting block and the molten steel is used for indirect temperature measurement, the direct temperature measurement data Tdirect and the indirect temperature measurement data Tindirect are synchronously collected under different working conditions to establish a comparison database.

[0020] The correction algorithm establishment stage: the temperature difference ΔT=Tdirect-Tindirect of each group of comparison data is calculated, the relationship between the temperature difference and the key factors such as the temperature of the molten steel, the environmental parameters and the steel grade parameters is statistically analyzed, and a correction model Tcorrected=Tindirect+f(Tindirect, environmental parameters, steel grade parameters) is established.

[0021] The actual application stage: switching to the production mode, a sealing plug is installed on the detachable sensor interface, the temperature measuring assembly is controlled to descend to the surface of the molten steel, the buoyancy provided by the float supports the temperature measuring assembly to stably immerse, the molten steel flows into the isolation cavity through the liquid inlet to form heat conduction with the heat conducting block, the temperature of the heat conducting block is obtained through indirect temperature measurement, and the real temperature of the molten steel is calculated in combination with the correction model.

[0022] Preferably, the release and recovery mechanism adopts an automatic release mechanism, when the ladle is inclined to a preset angle, the temperature measuring assembly automatically descends relying on gravity, and the impact force generated by the weight breaks the oxide film layer on the surface of the molten steel to create clean surface conditions for subsequent temperature measurement.

[0023] Preferably, the actual application stage further includes a double temperature measurement cross verification step: two ways of indirect heat conduction temperature measurement and infrared temperature measurement module are used at the same time, the molten steel surface state monitoring system dynamically adjusts the weight coefficients of the two temperature measurement ways according to the state of the oxide film on the surface of the molten steel, and finally calculates the temperature Tfinal=W1×Tcorrected1+W2×Tcorrected2.

[0024] Preferably, the standardization heat balance time is set to 30 seconds in the standard data establishment stage and the actual application stage, the heat exchange between the molten steel and the heat conducting block is ensured, and the environmental temperature, humidity and other parameters are monitored in real time and included in the correction calculation.

[0025] Preferably, when the comparison temperature measurement is performed under different working conditions, the temperature of the molten steel ranges from 1480℃ to 1700℃, the environmental temperature ranges from-10℃ to 40℃, not less than 5 groups of effective comparison data are collected under each working condition combination, and the statistical reliability of the correction algorithm is ensured.

[0026] Preferably, the method further includes a regular calibration step: the system automatically prompts for precision verification every 100 times of work, when the deviation between the indirect temperature measurement correction result and the expected value exceeds a set threshold, an automatic alarm is given to re-establish the correction model. Advantages

[0027] Compared with the prior art, the molten steel automatic temperature measurement system and the temperature measurement method have significant technical advantages and practical value. The temperature measurement device is innovatively designed, including a central immersion part with an inverted frustum structure, symmetrically arranged floating bodies, a built-in heat conducting assembly and a detachable sensor interface temperature measurement assembly, combined with a device frame body, a release and recovery mechanism and a carrier, to form a complete mechanical execution unit, cooperating with a control system and a data processing system, to realize full-automatic detection and analysis of the molten steel temperature. The system adopts a mixed temperature measurement strategy of "a small amount of direct temperature measurement + a large amount of rapid indirect temperature measurement", which fundamentally solves the contradiction between precision and equipment durability in traditional molten steel temperature measurement, and significantly improves the indirect temperature measurement accuracy by establishing a comparison correction model between direct and indirect temperature measurement.

[0028] The temperature measurement method of the present application forms a complete technical closed loop through the organic combination of the standard data establishment stage, the correction algorithm establishment stage and the actual application stage. In the calibration mode, the direct temperature measurement of the thermocouple and the indirect temperature measurement of the heat conducting block are realized simultaneously through the detachable sensor interface, and a reliable comparison database is established under different working conditions; in the production mode, only the indirect temperature measurement method is used, and the accurate molten steel temperature is calculated through the correction model, which avoids frequent consumption of the thermocouple and other vulnerable parts, and greatly reduces the operating cost. The automatic release mechanism designed in the system can automatically trigger the temperature measurement according to the inclination angle of the ladle, and the impact force generated by the self-weight descent of the temperature measurement assembly can also effectively break the oxidation film on the surface of the molten steel, creating clean surface conditions for subsequent infrared temperature measurement.

[0029] Further, the double temperature measurement cross verification technology adopted by the present application dynamically adjusts the weight coefficients of indirect temperature measurement and infrared temperature measurement according to the state of the molten steel surface oxidation film through an intelligent weight distribution algorithm, so that the final temperature measurement accuracy can reach a high precision level, significantly improving the reliability and stability of the temperature measurement results. The system has multiple protection mechanisms such as constant immersion depth control by the floating body, inverted frustum container to ensure consistency of molten steel inflow path, and standardized heat balance time control, to ensure the high reproducibility of each temperature measurement condition. At the same time, the system is equipped with a periodic calibration function and an abnormal detection mechanism, which can automatically identify the decrease of temperature measurement accuracy and prompt maintenance, ensuring long-term stable operation of the system, having good practicality and economic benefits, and being particularly suitable for precise monitoring of the molten steel temperature in the ladle casting process. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The system overall architecture diagram of the present application is shown in the figure; Figure 2 The calibration mode workflow diagram of the present application is shown in the figure; Figure 3The production mode flowchart of the present application; Figure 4 The overall structure schematic diagram of the molten steel automatic temperature measuring device of the present application; Figure 5 The side view structure schematic diagram of the device frame body of the present application; Figure 6 The locking state schematic diagram of the temperature measuring assembly when the ladle is in vertical state of the present application; Figure 7 The state schematic diagram of the chain disengaging from the one-way limiting sprocket during the tilting process of the ladle of the present application; Figure 8 The working state schematic diagram of the temperature measuring assembly automatically descending to the molten steel liquid surface for temperature measurement of the present application; Figure 9 The detailed structure schematic diagram of the carrier frame and the temperature measuring assembly of the present application; Figure 10 The detailed structure schematic diagram of the pressure locking mechanism of the present application.

[0031] Figure 11 The structure schematic diagram of the carrier frame and the temperature measuring assembly from another angle of the present application; Figure 12 The Figure 11 The local enlarged view of A in the above figure; Figure 13 The flow logic diagram of Example 2, which shows the complete working process of the double temperature measuring cross verification system; Figure 14 The field picture of the on-site ladle and the installation test of the trial piece of the temperature measuring device of the present application.

[0032] Explanation of reference numerals: Components in Example 1: Device frame body 100; release and recovery mechanism 200; carrier frame 300; temperature measuring assembly 400; vertical main body part 110; horizontal cantilever part 120; winding power assembly 210; guide wheel set 220; pulling transmission member 230; central immersion part 410; float 420; heat conduction assembly 430; detachable sensor interface 440; heat conduction block 431; central hole 31a; isolation cavity 432; indirect temperature measuring instrument 450; heat conduction connecting rod 451.

[0033] Components added in Example 2: Infrared temperature measuring module 460; molten steel surface state monitoring system 470; one-way limiting sprocket 221; pressure locking mechanism 240; pressing plate 241; hinged shaft 242. DETAILED DESCRIPTION Example

[0034] Refer to the attached Figure 1 - attached Figure 3The embodiment provides a molten steel automatic temperature measuring system and a temperature measuring method based on comparison correction in a ladle casting process. The system adopts a mixed temperature measuring strategy of "a small amount of direct temperature measurement + a large amount of rapid indirect temperature measurement", realizes the improvement of the indirect temperature measurement accuracy by establishing a comparison correction model between the two temperature measurement modes.

[0035] Specifically, the system acquires reference temperature data by using a traditional direct contact type temperature measuring method at a specific moment, simultaneously acquires comparison data by using an indirect heat conduction temperature measurement under the same working condition (the same steel grade, similar temperature range, consistent environmental parameters and the like), and establishes a correction relationship between the two by statistical analysis. In daily production, the system mainly relies on the indirect temperature measurement mode to perform high-frequency temperature monitoring, and corrects the indirect temperature measurement result to a precision level close to that of the direct temperature measurement by using the established correction algorithm.

[0036] The design solves the contradiction between the temperature measurement accuracy and the equipment durability in the traditional molten steel temperature measurement, avoids the problem of rapid wear of the temperature measurement equipment caused by frequent direct contact with the molten steel, and ensures the accuracy requirement of temperature monitoring in the production process.

[0037] The molten steel automatic temperature measuring system provided by the application mainly includes three parts of a temperature measuring device, a control system and a data processing system, realizes full-automatic detection and analysis of the temperature of the molten steel in the ladle.

[0038] Referring to the accompanying drawings Figure 4 - the accompanying drawings Figure 5 The temperature measuring device serves as a mechanical execution unit and mainly includes four functional modules: a device frame body 100, a release and recovery mechanism 200, a carrier 300 and a temperature measuring assembly 400. The device frame body 100 adopts an inverted L-shaped frame structure to provide mechanical support for the whole device, the main part is vertically fixed to the outer side wall of the ladle, and the cantilever part extends horizontally above the ladle; the release and recovery mechanism 200 realizes the lifting motion control of the temperature measuring assembly through pulling transmission; the carrier 300 serves as a bearing platform of the temperature measuring assembly and completes the positioning function; and the temperature measuring assembly 400 is a temperature detection unit and integrates related sensors and auxiliary devices for direct temperature measurement and indirect temperature measurement.

[0039] The control system is responsible for the automatic control of the whole temperature measuring process, including a motion control module (controlling the lifting action of the release and recovery mechanism), a sensor management module (managing the working states of various temperature sensors), a safety monitoring module (monitoring the running state and abnormal conditions of the equipment) and a man-machine interaction module (providing an operation interface and state display). The above control functions can be realized by using existing industrial automation technology, and the specific hardware configuration and software programming method are well known to those skilled in the art.

[0040] The data processing system realizes the acquisition, correction and output of temperature data. It includes a data acquisition module, a comparison and correction algorithm module, a data storage module and a communication interface module. It is responsible for processing the raw temperature measurement data through the correction algorithm and outputting accurate molten steel temperature values.

[0041] The data acquisition module is responsible for real-time acquisition of temperature signals from the indirect temperature measuring instrument 450, the ambient temperature sensor, and the infrared temperature measuring module 460 in Example 2, and performs multi-channel synchronous acquisition and signal processing through a standard industrial interface.

[0042] The comparison correction algorithm module compensates for the accuracy of indirect temperature measurement results based on the correction model established by the calibration mode. The correction formula is: Tcorrection = Tindirect + f(Tindirect, Tenvironment, Steel grade parameters), where the correction function parameters are determined through statistical analysis of calibration data. Example 2 also includes a weighted allocation algorithm for dual temperature measurement, dynamically adjusting the temperature measurement weight coefficients based on factors such as the surface condition of the molten steel.

[0043] The data storage module stores historical temperature measurement data, corrected algorithm parameters, equipment operation logs, and other information, and supports cyclic storage and data management functions.

[0044] The communication interface module supports multiple industrial communication protocols, enabling data exchange with the host computer system, uploading temperature data, and receiving control commands.

[0045] The aforementioned modules are implemented using mature industrial automation technologies, including PLCs, industrial computers, and standard sensor interfaces. The comparison correction algorithms and data processing methods are conventional techniques for those skilled in the art and can be standardized and developed based on the temperature measurement hardware architecture and working principle provided by this invention.

[0046] Now let's return to the temperature measuring device section, specifically as follows: Figure 4 Figure 12 As shown, with the ladle in a vertical working state as the reference, the device frame 100 adopts an inverted L-shaped spatial frame structure, mainly including two basic components: the vertical main body 110 and the horizontal cantilever 120.

[0047] The vertical main body 110 provides the primary support for the entire temperature measuring device and is securely fixed to the outer wall of the ladle via clamping or welding. During installation, ensure that the main body 110 is parallel to the ladle axis, with a verticality deviation controlled within ±2° to guarantee the accuracy of the subsequent temperature measuring component's movement trajectory.

[0048] The horizontal cantilever section 120 extends horizontally from the top of the main body section 110 towards the central axis of the ladle, and its length is determined according to the ladle diameter and temperature measurement requirements. The cantilever section 120 also serves to install the guide wheel assembly and provides running guidance for the traction drive components.

[0049] The release and recovery mechanism 200 adopts an electrically driven pull type lifting transmission system to realize the reciprocating movement of the temperature measuring assembly between the standby position and the temperature measuring position. The mechanism mainly consists of three parts, i.e., a winding power assembly 210, a guide wheel set 220 and a pulling transmission member 230.

[0050] The winding power assembly 210 is installed at the bottom end position of the main body part 110 and adopts a transmission scheme of "motor + reducer + winding drum".

[0051] The guide wheel set 220 includes upper end guide wheels, middle section guide wheels and terminal guide wheels, which are respectively located at the following three positions according to functions. The upper end guide wheels are installed at the top of the main body part 110 and are responsible for converting the movement direction of the pulling transmission member from vertical to horizontal; the middle section guide wheels are located at the middle height of the main body part 110 and play a supporting and guiding role to reduce the span of the pulling transmission member; the terminal guide wheels are installed at the free end of the cantilever part 120 and convert the movement direction again to vertical downward to guide the temperature measuring assembly to accurately reach the ladle center position. All the guide wheels are supported by high temperature bearings, and the rim surfaces are subjected to wear-resistant treatment.

[0052] The pulling transmission member 230 is selected from a stainless steel wire rope, one end of which is fixed to the winding drum 230 through a pressing plate or clamp, and the other end is connected to the carrier 300 through a quick connector after passing through the guide wheel set 220.

[0053] Control precision and safety protection: the system is configured with a travel switch and a tension detection device to realize the control of lifting stroke and the monitoring of abnormal load.

[0054] The carrier 300 is used as the bearing platform of the temperature measuring assembly 400 and adopts a space truss structure welded by aluminum alloy profiles. A lifting joint is arranged at the top of the carrier 300 and is fixedly connected with the terminal connector of the pulling transmission member 230. The joint is designed to contain a universal ball hinge structure, which allows the carrier to make a small self-adjustment during the descending process to compensate for the slight swing of the steel wire rope. A mounting seat is arranged at the bottom of the carrier 300 to facilitate the installation and positioning of the temperature measuring assembly 400. A cable routing channel is reserved inside the frame to protect the signal transmission cable of the temperature measuring assembly from mechanical damage. Anti-collision buffers are arranged at the four corners of the carrier to avoid accidental collision and damage to the temperature measuring assembly.

[0055] The temperature measuring assembly 400 takes the central immersion component 410 as the main structure, the floating bodies 420 are symmetrically arranged on both sides of the central immersion component 410 to provide buoyancy support, the heat conducting assembly 430 is built-in the immersion component, and the detachable sensor interface 440 is located at the center of the heat conducting assembly 430.

[0056] The central immersion part 410 is located at the geometric center of the temperature measurement assembly, and is a main body bearing structure made of high-temperature-resistant stainless steel or refractory ceramic material, and has a whole conical frustum structure with a large upper part and a small lower part. A liquid inlet is arranged at the bottom, and the opening edge is designed with a chamfer transition to ensure that the molten steel flows in and out quickly and completely. The float 420 is composed of two symmetrical hollow structures, which are fixed on the left and right sides of the central immersion part 410 respectively, and the installation height is flush with the middle part of the immersion part. The float is made of high-temperature ceramic material and coated with a refractory coating. The total buoyancy of the two floats is calculated to ensure that the whole temperature measurement assembly 400 remains stable and floats in the molten steel.

[0057] The heat conduction assembly 430 is installed inside the central immersion part 410 and serves as the core functional component for indirect temperature measurement. The detachable sensor interface 440 is arranged at the geometric center of the heat conduction assembly and is connected to the heat conduction assembly through standard threads, supporting the quick installation and removal of the temperature measurement sensor.

[0058] As a preferred embodiment, the central immersion part 410 has an inverted rectangular conical container configuration, with a rectangular opening of 82*125mm at the upper part, a rectangular liquid inlet of 12*80mm at the lower part, and a total height of 140mm. The container wall is 3mm thick and made of 316L stainless steel plate or high-alumina refractory ceramic material, and can withstand a working temperature of up to 1700°C. The edge of the bottom liquid inlet is chamfered at 15° to ensure smooth flow of the molten steel and complete discharge after temperature measurement, avoiding the influence of residual molten steel on the accuracy of the next temperature measurement. The outer wall surface is provided with a float mounting groove, which is symmetrically distributed on the left and right sides and connected to the float 420 through high-temperature adhesive and mechanical clamping.

[0059] As a preferred embodiment, the heat conduction assembly 430 is composed of a heat conduction block 431 and an isolation cavity 432, which is installed in the middle section of the central immersion part 410 as a functional unit for indirect temperature measurement. The heat conduction block 431 is made of red copper material and has a rectangular plate shape, which is fixed by clamping. The vertical distance between the bottom surface of the heat conduction block 431 and the container bottom liquid inlet is controlled at an appropriate distance, for example, 80±2mm. The isolation cavity 432 is formed by the bottom surface of the heat conduction block 431, the inner wall of the container, and the molten steel liquid surface, forming a closed heat transfer space. The side wall of the cavity is completely sealed, and the molten steel can only enter the cavity from the bottom opening of the container and exchange heat with the heat conduction block 431 through the bottom opening. This structure design ensures that the heat conduction path between the molten steel and the heat conduction block is the same every time the temperature is measured, and the volume of the molten steel in the cavity is consistent, providing sufficient heat capacity for establishing a stable thermal equilibrium. The upper end surface of the heat conduction block 431 is provided with a center hole 31a for installing the detachable sensor interface 440, which is used to install the thermocouple for direct contact temperature measurement. The center hole 31a can be closed with a sealing plug.

[0060] As preferred, the detachable sensor interface 440 is provided with a spring pressing mechanism, when the thermocouple is inserted into the interface, the top rod presses the thermocouple probe downward under the action of the spring, ensuring that the probe is in close contact with the bottom of the heat conduction block. In calibration mode, the thermocouple is installed into the interface through the quick locking device; in production mode, a special sealing plug is used to replace the thermocouple.

[0061] System operation mode design According to the balance between temperature measurement accuracy requirements and equipment use economy, the system is designed with two operation modes of calibration mode and production mode, and the mode switching is realized through the detachable sensor interface 440.

[0062] Indirect temperature measurement instrument configuration: the indirect temperature measurement instrument 450 is installed on the upper position of the carrier 300, a high-precision temperature transmitter is used, and the upper end surface of the heat conduction block 431 is connected through a heat conduction connecting rod 451. The temperature measurement instrument monitors the temperature change of the heat conduction block 431 in real time, the temperature measurement accuracy is ±0.5℃, and the response time is ≤3 seconds. The heat conduction connecting rod 451 is made of high-thermal-conductivity material such as copper.

[0063] Calibration mode operation flow: started before the system is put into use or calibrated regularly. The operator installs the standard thermocouple (accuracy grade ±1.5℃) into the center hole on the upper end surface of the heat conduction block 431 through the quick locking device, the spring pressing mechanism ensures that the thermocouple probe is in close contact with the bottom of the heat conduction block, and the thermocouple wire directly contacts the molten steel through the isolation cavity 432.

[0064] The system performs temperature measurement according to the preset program, the temperature measurement assembly 400 is lowered to the surface of the molten steel, and the molten steel flows into the isolation cavity 432 through the bottom rectangular liquid inlet (12×80mm). At this time, the system synchronously performs two kinds of temperature measurement: the thermocouple directly contacts the molten steel to obtain the real temperature Tdirectly, and the indirect temperature measurement instrument 450 obtains the indirect temperature Tindirect through the heat conduction block 431. After the heat balance time is set to 30 seconds, the system collects two groups of temperature data.

[0065] Repeat and compare the temperature measurement under different working conditions, collect not less than 20 groups of effective data pairs under each working condition, the system automatically calculates the temperature difference ΔT=Tdirectly-Tindirect, and establishes a correction algorithm model of indirect temperature measurement and direct temperature measurement. After calibration, the thermocouple is disassembled and a special sealing plug is installed to close the center hole.

[0066] Production mode operation flow: during daily production temperature measurement, the sensor interface 440 is installed with a sealing plug, the center hole is in a closed state. Only the indirect temperature measurement instrument 450 is used to monitor the temperature of the heat conduction block during the temperature measurement, and the real temperature of the molten steel is calculated combined with the established correction algorithm model. The whole process does not consume consumable parts such as thermocouples, reducing the operation cost.

[0067] Mode switching mechanism: the switching between the two modes only needs to change the accessories (thermocouple or sealing plug) of the sensor interface 440, and the indirect temperature measuring instrument 450 works normally in both modes, ensuring the continuity of system operation and the consistency of data.

[0068] Specific implementation process of the comparison correction method First stage: standard data establishment stage Before the system is put into use, the comparison database of indirect temperature measurement and direct temperature measurement is established by using the calibration mode. Under normal casting conditions, a K-type thermocouple is installed in the center hole of the heat conduction block 431, and the thermocouple probe directly contacts the molten steel through the isolation cavity 432. After the temperature measuring assembly 400 is lowered to the standard position, the molten steel fills the isolation cavity through the rectangular liquid inlet (12x80mm), forming a heat conduction distance.

[0069] The system synchronously collects two-way temperature data: the thermocouple directly measures the molten steel temperature Tdirectly, and the indirect temperature measuring instrument 450 on the carrier 300 measures the heat conduction block temperature Tindirectly. Comparison temperature measurement is carried out under different molten steel temperature conditions (1480℃-1700℃), different environmental temperature conditions (-10℃-40℃), and different steel types, ensuring that at least 5 sets of effective comparison data are collected under each working condition combination.

[0070] Second stage: correction algorithm establishment stage Based on the collected standard data, a mathematical correction model is established. The system automatically calculates the temperature difference ΔT=Tdirectly-Tindirectly of each set of comparison data, and statistically analyzes the relationship between ΔT and the key factors such as molten steel temperature, environmental temperature, heat conduction distance, and heat balance time. A correction model is established by using multivariate linear regression or neural network algorithm: Tcorrected = Tindirectly + f(Tindirectly, Tenvironment, tbalance, steel parameters) Where f is the correction function, and the parameters are optimized by machine learning algorithm. The system uses an independent verification data set to verify the model accuracy, ensuring that the corrected temperature accuracy reaches within ±3℃.

[0071] Third stage: correction implementation in actual application stage Switch to production mode, install sealing plug in sensor interface 440, center hole is closed. The temperature measuring assembly 400 is lowered to the surface of the molten steel, the float 420 ensures the consistency of the immersion depth, and the molten steel fills the isolation cavity 432 to form a stable heat conduction with the heat conduction block 431. The indirect temperature measuring instrument 450 monitors the heat conduction block temperature, and the system synchronously collects environmental temperature, steel type information and other parameters.

[0072] According to the preset heat balance time (usually 30 seconds), the system substitutes the measured parameters into the correction model to calculate: T molten steel = T indirect + ΔT correction. The corrected molten steel temperature is output by the data processing system for production control.

[0073] Correction accuracy guarantee measures: The system is equipped with regular self-checking function, such as automatic calibration prompt every 100 times of work; real-time monitoring of environmental parameters and automatic inclusion in correction calculation; establishment of temperature correction database to support special correction algorithms for different steel grades and working conditions; setting of abnormal data identification mechanism to automatically alarm and prompt manual inspection when the correction result deviates too much.

[0074] Condition consistency guarantee mechanism To ensure the condition reproducibility of each indirect temperature measurement, the system is equipped with multiple guarantee mechanisms: the float 420 provides stable buoyancy control to ensure that the temperature measurement assembly 400 is immersed in the molten steel at a constant depth at the standard position; the rectangular conical container structure ensures the consistency of the molten steel inflow path and filling volume, and the fixed geometry of the isolation cavity 432 ensures the heat conduction distance between the heat conduction block 431 and the molten steel; the standardized heat balance time control (30 seconds) provides sufficient time for sufficient heat exchange; the environmental parameter monitoring system on the carrier 300 collects environmental temperature, humidity and other data in real time and automatically includes them in the correction calculation; the system has a regular calibration prompt function built-in, which automatically reminds to verify the accuracy after completing 100 temperature measurements.

[0075] System workflow Temperature measurement start: after receiving the temperature measurement instruction, the system starts the winding power assembly 210, drives the carrier 300 and temperature measurement assembly 400 to descend from the standby position by pulling the transmission member 230. The guide wheel set 220 guides the movement trajectory to ensure that the temperature measurement assembly accurately reaches the center position of the ladle.

[0076] Contact positioning: when the temperature measurement assembly 400 contacts the molten steel surface, the buoyancy generated by the float 420 balances with the gravity of the assembly, making the assembly stable and floating to the standard immersion depth. The molten steel flows into the isolation cavity 432 through the bottom rectangular liquid inlet (12x80mm) and forms a consistent heat conduction distance with the bottom surface of the heat conduction block 431.

[0077] Temperature measurement: after the molten steel fills the isolation cavity, the system starts the 30-second heat balance timer. The indirect temperature measurement instrument 450 on the carrier 300 continuously monitors the temperature change of the heat conduction block 431 through the heat conduction connecting rod. At the same time, the environmental parameter monitoring system collects real-time environmental data.

[0078] Data processing: after the heat balance time ends, the system collects the final heat conduction block temperature T indirect and environmental parameters, and calls the corresponding correction algorithm model through the data processing system to calculate the corrected real temperature of the molten steel T molten steel.

[0079] Temperature measurement end: After the temperature measurement data output is completed, the winding power assembly 210 reverses operation to pull the temperature measurement assembly 400 to return to the standby position. The molten steel in the isolation cavity 432 flows out naturally through the rectangular liquid inlet under the action of gravity, completing a complete temperature measurement cycle. The entire process takes about 60 seconds, achieving rapid and accurate automated temperature measurement.

[0080] Example 2: Double temperature measurement cross verification system Referring to the accompanying Figure 6 - the Figure 13 This embodiment adds an infrared temperature measurement function based on Example 1, forming a "indirect heat conduction temperature measurement + infrared temperature measurement + double cross verification" temperature measurement system. The system simultaneously uses two non-contact temperature measurement methods, dynamically adjusts the reliability weight of the two temperature measurement methods through an intelligent weight distribution algorithm, and integrates an automatic release mechanism to automatically trigger temperature measurement according to the inclination state during ladle casting, so that the final temperature measurement accuracy reaches the target value ± 2℃.

[0081] Based on the characteristics of ladle casting process, when the molten steel is reduced to about half the volume, the temperature decreases significantly faster, and timely and frequent temperature measurement becomes crucial. This embodiment designs an automatic release mechanism linked to the ladle inclination angle, achieving intelligent control of the temperature measurement timing.

[0082] System improvement content: Based on Example 1, the temperature measurement assembly 400 adds an infrared temperature measurement module 460 and a molten steel surface state monitoring system 470; the release and recovery mechanism 200 is upgraded to an intelligent automatic release function, using a chain-cable combined transmission system 230; a pressure locking mechanism 240 is added to realize mechanical linkage with the ladle inclination angle.

[0083] Improvement design of chain-cable combined transmission system 230 The pulling transmission member 230 adopts a combined structure of chain and cable, replacing the single steel wire rope transmission method in Example 1. The cable part connects the winding power assembly 210 and the chain part, and the free end of the chain part suspends the carrier 300. The cable section bears the basic lifting transmission function and provides stable pulling force transmission; the chain section realizes mechanical linkage with the automatic release mechanism, supporting automatic disengagement and relocking functions.

[0084] The one-way limiting sprocket 221 is installed at the lower end of the cantilever part 120, with a one-way limiting function: allowing the chain to move upward for recovery under the drive of the winding power assembly 210, but limiting the free downward movement of the chain through the ratchet mechanism. This sprocket is a key component for realizing the automatic release function, locking the temperature measurement assembly in the standby position when the ladle is vertical, and cooperating with the pressure locking mechanism to realize automatic disengagement of the chain when the ladle is inclined to the preset angle.

[0085] The pressing locking mechanism 240 is fixed above the cantilever part 120, including a pressing plate 241, a hinged shaft 242 and a torsion spring. The pressing plate 241 is hingedly connected to the cantilever part 120 through the hinged shaft 242, and the torsion spring is sleeved on the hinged shaft 242 and positioned and supported at the pressing plate 241 and the cantilever part 120 respectively, so as to provide a downward pre-tightening force for the pressing plate, so that the pressing plate tightly presses the chain in the initial state, and the chain is locked in the tooth groove of the one-way limiting sprocket 221. The pressing force of the pressing plate 241 can be adjusted by adjusting the bolt to adapt to different release angle requirements.

[0086] Rope buffer segment design: The winch in the winding power assembly 210 is arranged at a middle lower position of the main body part 110, and the rope is led out from the winch, changes direction through a guide wheel, and extends upward to the chain connection point. This layout forms a rope buffer segment between the winch and the guide wheel, provides necessary rope allowance for the rapid descent of the temperature measuring assembly 400 when the chain is automatically released, and ensures smooth completion of the automatic release action.

[0087] Automatic release principle and process Locked state: When the ladle is in a vertical state, the pressing plate 241 of the pressing locking mechanism 240 is pressed downward to tightly press the chain under the action of the torsion spring, so that the chain is firmly locked in the tooth groove of the one-way limiting sprocket 221, and the temperature measuring assembly 400 remains in the standby position. At this time, the chain suspension carrier 300 and the temperature measuring assembly 400 are in a static balance state, the direction of gravity coincides with the chain axis, and no additional separation torque is generated on the pressing force of the pressing locking mechanism 240.

[0088] Torque change process: As the molten steel liquid level in the ladle descends during the ladle casting process, the inclination angle of the ladle gradually increases. When the ladle is inclined, the suspended carrier 300 and the temperature measuring assembly 400 generate a horizontal component under the action of gravity, and the horizontal component generates a gradually increasing separation torque on the pressing locking mechanism 240. The size of the separation torque is proportional to the sine value of the inclination angle of the ladle, and significantly increases with the increase of the inclination angle.

[0089] Automatic release process: When the ladle is inclined to a preset angle (usually 15°-20°), the separation torque generated by gravity exceeds the maximum locking torque of the pressing locking mechanism 240, the pressing plate 241 is lifted, and the chain is automatically released from the tooth groove of the one-way limiting sprocket 221. The chain after release rapidly descends under the action of the self-weight of the carrier 300 and the temperature measuring assembly 400, and the allowance provided by the rope buffer segment ensures smooth completion of the descending action.

[0090] Membrane breaking effect: the impact force (about 20-30N) generated by the rapid descent of the temperature measurement assembly 400 under its own weight can effectively break the oxide film layer on the surface of the molten steel, exposing the relatively clean surface of the molten steel. This mechanical membrane breaking effect creates good conditions for subsequent infrared temperature measurement, and the breaking of the oxide film significantly improves the accuracy and reliability of infrared temperature measurement. After impact contact, the float 420 immediately comes into play, stabilizing the temperature measurement assembly at the standard immersion depth.

[0091] Adjustable design: the release angle of the pressure locking mechanism 240 can be adjusted by adjusting the pre-tightening force of the torsional spring, adapting to the process requirements and inclination characteristics of different ladles, with a release angle adjustment range of 10°-25°.

[0092] Infrared temperature measurement module 460 and molten steel surface state monitoring system 470 The infrared temperature measurement module 460 is installed at the upper position of the carrier 300, including an infrared sensor, an optical focusing system, and a ranging positioning system. The infrared sensor measures a temperature range of 1200℃-1800℃ with an accuracy of ±5℃ and a response time of ≤1 second. The optical focusing system locks the temperature measurement target on the molten steel surface within a circular area of 50mm in diameter through an adjustable focal length lens, ensuring the accuracy of the temperature measurement area. The ranging positioning system uses laser ranging principles to monitor the distance between the infrared sensor and the molten steel surface in real time.

[0093] The infrared temperature measurement module 460 is fixed to the upper end of the carrier 300 through a bracket, which has a pitch angle adjustment function (adjustment range ±15°), ensuring that the optical axis of the infrared sensor is perpendicular to the center area of the molten steel surface. The module housing is designed with high temperature protection, equipped with a cooling fan and a heat shield to protect the internal precision components from the influence of molten steel radiation heat.

[0094] The molten steel surface state monitoring system 470 is integrated inside the infrared temperature measurement module 460, which analyzes the molten steel surface state in real time through a high-definition camera and image processing algorithm. The system focuses on monitoring the effect of self-weight impact membrane breaking: when it is detected that the oxide film on the molten steel surface has been effectively broken, exposing the metallic luster, the system automatically increases the weight coefficient of the infrared temperature measurement; when the surface is still covered with an oxide film, the system reduces the weight of the infrared temperature measurement, relying more on the indirect heat conduction temperature measurement results.

[0095] Collaborative working mechanism: when the temperature measurement assembly 400 automatically descends and breaks the oxide film, the molten steel surface state monitoring system 470 immediately analyzes the membrane breaking effect, and the infrared temperature measurement module 460 measures the clean molten steel surface at the best time (within 2-3 seconds after impact). At the same time, the indirect temperature measurement instrument 450 on the carrier 300 continues to monitor the temperature of the heat conduction block, and the double temperature measurement data is fused and processed through a weight distribution algorithm to output the final molten steel temperature value.

[0096] Double temperature measurement cross verification method Calibration mode operation process: The system establishes a triple correspondence between indirect heat conduction temperature measurement, infrared temperature measurement and direct temperature measurement at the same time in the calibration stage. Install K-type thermocouple in the center hole of the heat conduction block 431 for direct temperature measurement, the indirect temperature measurement instrument 450 on the carrier 300 monitors the heat conduction block temperature, and the infrared temperature measurement module 460 non-contact measures the surface temperature of the molten steel.

[0097] When the ladle is tilted to the preset angle, the temperature measurement assembly 400 is automatically released and quickly descends, impacting to break the oxide film on the surface of the molten steel. The molten steel surface state monitoring system 470 evaluates the film breaking effect in real time, and after confirming that the surface cleanliness meets the standard, the three sets of temperature measurement systems work synchronously for 30 seconds to collect data. The system records three groups of data of direct temperature measurement Tdirect, indirect temperature measurement Tindirect and infrared temperature measurement T infrared, and establishes a double correction algorithm model: Tcorrected1 = Tindirect + f1(Tindirect, environmental parameters) Tcorrected2 = T infrared + f2(T infrared, surface state parameters) Production mode operation process: In daily production, the sensor interface 440 is installed with a sealed plug, and the system relies on double temperature measurement cross verification to obtain the final temperature. When the ladle is tilted to trigger automatic release, the temperature measurement assembly 400 descends to break the oxide film, and the double temperature measurement system works synchronously: the indirect temperature measurement instrument 450 collects the heat conduction block temperature, and the infrared temperature measurement module 460 measures the surface temperature at the best time after breaking the film.

[0098] Intelligent weight distribution algorithm: The system dynamically adjusts the credibility weight of the two temperature measurement methods according to the real-time working conditions. The weight distribution considers the following factors: molten steel surface state (oxide film breaking effect), distance measurement accuracy (infrared temperature measurement distance deviation), environmental conditions (environmental temperature, humidity influence on indirect temperature measurement), historical data trend (consistency of continuous temperature measurement results).

[0099] The final temperature calculation formula is: Tfinal = W1 x Tcorrected1 + W2 x Tcorrected2, where W1 + W2 = 1, and the weight coefficient is dynamically adjusted according to the real-time evaluation result. When the surface film breaking effect is good, W2 increases (the weight of infrared temperature measurement increases); when the surface state is poor, W1 increases (more dependent on indirect temperature measurement).

[0100] Self-weight descent advantage: The temperature measurement assembly contacts the surface of the molten steel under similar impact conditions each time, enhancing the consistency of the temperature measurement conditions. In the key stage of rapid temperature drop of the molten steel, double temperature measurement cross verification provides a stable and reliable temperature measurement benchmark and fast response verification, ensuring that accurate temperature data with an accuracy of ±2°C is obtained at the key process nodes. In some optional embodiments of the above two embodiments, the carrier 300 is provided with a containing space 301 on the side away from the central immersion component 410 connection position, which is a groove structure or a mounting groove structure, used to place the related auxiliary equipment of the temperature measurement assembly 400, including a signal amplifier of the temperature sensor, a data processing module, a wireless transmission module, a battery pack, etc. The containing space 301 is provided with a protective cover plate to protect the internal equipment from high temperature and dust.

[0101] In some optional embodiments, the upper end of the carrier 300 is provided with a circular arc part 310, and the bottom of the cantilever part 120 is correspondingly provided with a groove 320 matched with the shape of the circular arc part 310. The pulling transmission member 230 is connected at the middle position of the carrier 300. When the carrier 300 is lifted to the highest position, the circular arc part 310 is embedded in the groove 320, at this time the pulling transmission member 230 continues to tighten, and the carrier 300 rotates around the circular arc part 310 as the fulcrum, so that the bottom end of the carrier 300 is tilted outward, so that the temperature measurement assembly 400 is farthest away from the liquid surface of the molten steel in the standby state, avoiding the influence of high temperature radiation. When temperature measurement is needed, the carrier 300 is released from the tilted state and descends, because the bottom end is tilted to increase the initial height, the temperature measurement assembly 400 has greater potential energy of descent, which can more effectively break the oxide film on the surface of the molten steel, ensuring good contact effect.

[0102] Although the present application has been disclosed as above, the present application is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, therefore the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. An automated temperature measurement system for molten steel based on comparison correction during ladle casting, characterized in that, include: The temperature measuring device includes: a frame (100) having a vertical main body (110) and a horizontal cantilever (120); a release and retrieval mechanism (200) having a winding power assembly (210), a guide wheel assembly (220), and a traction transmission component (230) to realize the reciprocating motion of the temperature measuring component between a standby position and a temperature measuring position; a carrier (300) serving as a platform for supporting the temperature measuring component; and a temperature measuring component (400) having a central immersion component (410), a float (420), a heat-conducting component (430), and a detachable sensor interface (440); wherein, The central immersion component (410) has an inverted frustum-shaped structure with a liquid inlet at the bottom; the floats (420) are symmetrically arranged on both sides of the central immersion component to provide buoyancy support; the heat-conducting component (430) is built into the immersion component and includes a heat-conducting block (431) and an isolation cavity (432); the detachable sensor interface (440) is provided through the heat-conducting block (431) to realize the switching between direct and indirect temperature measurement, wherein direct temperature measurement is performed by the thermocouple directly contacting the molten steel, and indirect temperature measurement is performed by the heat conduction between the heat-conducting block and the molten steel; The control system is responsible for the automated control of the entire temperature measurement process; The data processing system includes a data acquisition module, a comparison and correction algorithm module, a data storage module, and a communication interface module, which realizes the acquisition, correction, and output of temperature data. The system adopts a hybrid temperature measurement strategy of "small amount of direct temperature measurement + large amount of rapid indirect temperature measurement". By establishing a comparison and correction model between the two temperature measurement methods, the accuracy of indirect temperature measurement is improved.

2. The automated temperature measurement system for molten steel according to claim 1, characterized in that, The release and recovery mechanism (200) also includes a one-way limiting sprocket (221) and a pressure locking mechanism (240). The traction transmission component (230) adopts a chain-rope combination structure. When the ladle tilts to a preset angle, the separation torque generated by gravity causes the pressure locking mechanism to automatically disengage, thereby realizing the automatic release and descent of the temperature measuring component.

3. The automated temperature measurement system for molten steel according to claim 1, characterized in that, It also includes an infrared temperature measurement module (460) and a molten steel surface condition monitoring system (470) installed on the carrier (300). The data processing system has an intelligent weight allocation algorithm that dynamically adjusts the weight coefficients of indirect temperature measurement and infrared temperature measurement according to the oxide film state of the molten steel surface.

4. The automated temperature measurement system for molten steel according to claim 1, characterized in that, The central immersion component (410) is an inverted rectangular frustum container with a chamfered transition at the edge of the inlet.

5. An automated temperature measurement method for molten steel based on comparison correction, characterized in that, The method employs a temperature measuring device, which includes a device frame (100), a release and retrieval mechanism (200), a carrier (300), and a temperature measuring assembly (400) having a central immersion component (410), a float (420), a heat-conducting component (430), and a detachable sensor interface (440), comprising the following steps: Standard data establishment stage: In calibration mode, the thermocouple is installed on the heat-conducting block (431) of the heat-conducting component (430) through the detachable sensor interface (440). The release and recovery mechanism (200) is controlled to lower the temperature measuring component (400) to the surface of the molten steel. The molten steel flows into the isolation chamber (432) through the liquid inlet of the central immersion component (410). The thermocouple probe directly contacts the molten steel for direct temperature measurement. At the same time, indirect temperature measurement is performed through heat conduction between the heat-conducting block (431) and the molten steel. Direct temperature measurement data Tdirect and indirect temperature measurement data Tindirect are collected simultaneously under different working conditions to establish a comparison database. The correction algorithm establishment stage: Calculate the temperature difference ΔT = T direct - T indirect for each set of comparative data, statistically analyze the relationship between the temperature difference and key factors such as molten steel temperature, environmental parameters, and steel grade parameters, and establish the correction model T correction = T indirect + f(T indirect, environmental parameters, steel grade parameters); In practical application stage: switch to production mode, install a sealing plug on the detachable sensor interface (440), control the temperature measuring component (400) to descend to the surface of molten steel, the float (420) provides buoyancy support to stabilize the temperature measuring component in the immersion, the molten steel flows into the isolation cavity (432) through the liquid inlet and forms heat conduction with the heat conduction block (431), the temperature of the heat conduction block is obtained by indirect temperature measurement, and the true temperature of the molten steel is calculated by combining the correction model.

6. The automated temperature measurement method for molten steel according to claim 5, characterized in that, The release and recovery mechanism (200) adopts an automatic release mechanism. When the ladle is tilted to a preset angle, the temperature measuring component (400) automatically descends by gravity and uses the impact force generated by its own weight to break the oxide film layer on the surface of the molten steel, creating clean molten steel surface conditions for subsequent temperature measurement.

7. The automated temperature measurement method for molten steel according to claim 5, characterized in that, In the practical application stage, a dual temperature measurement cross-verification step is also included: both indirect heat conduction temperature measurement and infrared temperature measurement module (460) are used at the same time. The steel surface condition monitoring system (470) dynamically adjusts the weight coefficients of the two temperature measurement methods according to the oxide film state of the steel surface, and calculates the final temperature T final = W1×T correction 1 + W2×T correction 2.

8. The automated temperature measurement method for molten steel according to claim 5, characterized in that, In both the standard data establishment stage and the actual application stage, the standardized thermal balance time is set to 30 seconds to ensure sufficient heat exchange between the molten steel and the heat-conducting block (431), and parameters such as ambient temperature and humidity are monitored in real time and incorporated into the correction calculation.

9. The automated temperature measurement method for molten steel according to claim 5, characterized in that, When conducting comparative temperature measurements under different working conditions, the molten steel temperature range is 1480℃-1700℃, and the ambient temperature range is -10℃-40℃. No less than 5 sets of valid comparative data are collected under each working condition combination.

10. The automated temperature measurement method for molten steel according to claim 5, characterized in that, It also includes a periodic calibration step: the system automatically prompts for accuracy verification every 100 working cycles, and when the deviation between the indirect temperature measurement correction result and the expected value exceeds the set threshold, it automatically alarms and prompts the system to rebuild the correction model.

Images