Temperature measuring device and ladle refining furnace

Abstract

The utility model provides a temperature measuring device and a ladle refining furnace, and relates to the technical field of smelting, the temperature measuring device comprises a temperature measuring assembly, a heat insulation mechanism and a core wire conveying mechanism, the temperature measuring assembly comprises an optical core-spun yarn and a temperature measuring module, and the optical core-spun yarn is connected with the temperature measuring module; the heat insulation mechanism comprises a movable heat insulation moving sleeve and a lifting mechanism, the heat insulation moving sleeve is provided with a cooling channel allowing the optical core-spun yarn to pass through, and the lifting mechanism is connected with the heat insulation moving sleeve and used for driving the heat insulation moving sleeve to enter and exit from the ladle refining furnace; the core wire conveying mechanism is used for driving the optical core-spun yarn to penetrate through the cooling channel and be inserted into the preset depth of the molten steel so as to obtain a temperature signal. According to the utility model, the insertion depth of the optical core-spun yarn can be driven and accurately controlled through the core yarn conveying mechanism, a temperature measurement point is ensured to be located at an optimal position, the accuracy of temperature measurement is improved, automatic operation can be realized through the cooperation of the lifting mechanism and the core yarn conveying mechanism, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical technology, and in particular to a temperature measuring device and a ladle refining furnace. Background Technology

[0002] In modern steelmaking processes, the conventional flow pattern is: primary furnace (electric furnace / converter) → LF → VD / VOD (RH / RH-OB) → continuous casting. The ladle furnace (LF) is located between the primary furnace (upper process) and VD / VOD (or RH / RH-OB) and continuous casting (lower process), playing a crucial supporting role. The main function of the ladle furnace is to reduce the metallurgical load on the upper process (primary furnace), allowing it to focus on charge melting and dephosphorization / decarburization. Furthermore, the ladle furnace ensures stable process conditions for the lower processes (VD / VOD, RH / RH-OB) and continuous casting, enabling their successful completion.

[0003] The essence of a ladle refining furnace is to perform refining operations on molten steel under normal pressure and with a reducing atmosphere maintained above the molten steel surface, including argon blowing and electric arc heating. The molten steel gains new heat energy through electric arc heating. This not only allows for the addition of alloys and slag during ladle refining, facilitating the adjustment of the molten steel composition and enabling deep desulfurization and deoxidation, but also ensures the initial pouring temperature for continuous casting, thus improving billet quality. Argon is blown into the molten steel through permeable bricks at the bottom of the ladle, ensuring thorough stirring. This stirring helps to homogenize the temperature and composition of the molten steel, accelerates the desulfurization reaction rate, promotes the flotation of inclusions, controls their morphology, and reduces the oxygen content in the molten steel.

[0004] In the ladle refining furnace production process, real-time monitoring of molten steel temperature is an extremely important operation, directly affecting the production process and efficiency of the ladle refining furnace, and influencing the production scheduling of the entire steelmaking process. The existing temperature measurement method involves inserting a steel rod with a platinum-rhodium alloy thermocouple into the molten steel to a depth of less than 300mm for intermittent temperature measurement. This method has drawbacks, including the inability to continuously monitor the molten steel temperature in real time, and high production costs. Therefore, how to better monitor the molten steel temperature in real time and continuously has become an urgent technical problem to be solved. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a temperature measuring device and a ladle refining furnace for better real-time and continuous monitoring of molten steel temperature.

[0006] The above-mentioned objective of this utility model can be achieved by the following technical solution: This utility model provides a temperature measuring device, comprising:

[0007] A temperature measuring component, comprising an optical core-coated wire and a temperature measuring module, wherein the optical core-coated wire is connected to the temperature measuring module;

[0008] A heat insulation mechanism, comprising a movable heat insulation sleeve and a lifting mechanism, wherein the heat insulation sleeve has a cooling channel for the optical cored wire to pass through, and the lifting mechanism is connected to the heat insulation sleeve and is used to drive the heat insulation sleeve in and out of the ladle refining furnace.

[0009] A core wire conveying mechanism is used to drive the optically coated core wire through the cooling channel and insert it into the molten steel at a preset depth to obtain a temperature signal.

[0010] In a preferred embodiment of this utility model, the temperature measurement module includes either a fiber optic demodulator or a spectrometer.

[0011] In a preferred embodiment of the present invention, the optical cored wire includes an optical fiber, a ceramic fiber tape, and a metal sheath sequentially arranged from the inside out.

[0012] In a preferred embodiment of this utility model, the metal sleeve is made of low carbon steel plate with a thickness of 0.1mm-0.5mm and the outer diameter of the metal sleeve is 8mm-16mm.

[0013] In a preferred embodiment of the present invention, the lifting mechanism includes a lifting guide column and at least one holding arm movably disposed on the lifting guide column, the holding arm being connected to the heat-insulating movable sleeve.

[0014] In a preferred embodiment of the present invention, the core wire conveying mechanism includes a wire feeder, a wire inlet mechanism disposed upstream of the wire feeder, and a wire guide mechanism disposed between the wire feeder and the heat-insulating movable sleeve. The wire feeder is used to drive the optical core wire to enter the ladle along the wire inlet mechanism, the wire guide mechanism, and the heat-insulating movable sleeve.

[0015] In a preferred embodiment of the present invention, the cable entry mechanism includes a cage, a cable entry guide cage, and a cable entry guide frame arranged sequentially along the cable entry direction of the optical cored cable.

[0016] In a preferred embodiment of the present invention, the conductor mechanism includes a core wire conduit, which is used to guide the optically coated core wire output by the wire feeder to the heat-insulating movable sleeve.

[0017] In a preferred embodiment of the present invention, the temperature measuring device further includes a wire cage, which is arranged upstream of the wire feeding mechanism and is used to hold the optical cored wire.

[0018] In a preferred embodiment of this utility model, multiple optical cored wires are provided, and the wire inlet mechanism and the wire conductor mechanism are both provided corresponding to the optical cored wires.

[0019] In a preferred embodiment of the present invention, the temperature measuring device further includes an alarm device, which is disposed at the tail end of the optical core wire.

[0020] This utility model also provides a ladle refining furnace, including the aforementioned temperature measuring device.

[0021] In a preferred embodiment of the present invention, the ladle refining furnace includes a ladle, a water-cooled cover disposed on the ladle, and an electrode assembly. The water-cooled cover is provided with an optical fiber temperature measuring hole, and the heat-insulating movable sleeve of the temperature measuring device is vertically and vertically inserted into the optical fiber temperature measuring hole.

[0022] In a preferred embodiment of the present invention, the electrode assembly includes a conductive cross arm and an electrode disposed on the conductive cross arm, the electrode being able to be inserted into the ladle.

[0023] In a preferred embodiment of this invention, the ladle refining furnace further includes a weighing device for measuring the weight of the ladle. By measuring the weight of the ladle, the liquid level of the molten steel inside the ladle can be determined, thereby determining the descent depth of the heat-insulating moving sleeve and the temperature-measuring cored wire.

[0024] The technical solution of this utility model has the following significant beneficial effects:

[0025] When in use, the temperature measuring device described in this utility model is installed on one side of the ladle refining furnace. It can accurately measure the temperature of the molten steel inside the furnace in real time. Specifically, by using a fiber optic cored wire in conjunction with a high-precision temperature measuring module such as a fiber optic demodulator or spectrometer, it can accurately measure the temperature changes of the molten steel in real time, offering high accuracy and fast response. Furthermore, the heat-insulating moving sleeve effectively isolates the fiber optic cored wire from the influence of high-temperature molten steel, preventing deformation due to the molten steel and high-temperature radiation during descent, thus improving measurement accuracy. Additionally, a lifting mechanism drives the heat-insulating moving sleeve in and out of the ladle refining furnace, ensuring the fiber optic cored wire can quickly enter or exit the molten steel when needed, improving operational convenience and safety, and facilitating automated operation.

[0026] Furthermore, the core wire conveying mechanism can drive and precisely control the insertion depth of the optically wrapped core wire, ensuring that the temperature measuring point is in the optimal position and improving the accuracy of temperature measurement. This invention, through the cooperation of the lifting mechanism and the core wire conveying mechanism, achieves automated operation, replacing manual temperature measurement. This not only improves work efficiency but also reduces human error, realizing a highly efficient and stable temperature measurement process. It can improve production efficiency and energy utilization efficiency, resulting in cost reduction and efficiency improvement. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0029] Figure 1 This is a side view of one embodiment of the temperature measuring device described in this utility model.

[0030] Figure 2 This is a top view of one embodiment of the ladle refining furnace described in this utility model.

[0031] The reference numerals in the above figures are as follows:

[0032] 10. Steel ladle;

[0033] 20. Water-cooled cover; 21. Fiber optic temperature sensor port;

[0034] 30. Electrode assembly; 31. Conductive cross arm; 32. Electrode;

[0035] 40. Weighing device;

[0036] 50. Temperature measuring device;

[0037] 100. Temperature sensing component; 110. Optical cored wire; 120. Temperature sensing module; 130. Alarm device;

[0038] 200. Thermal insulation mechanism; 210. Thermal insulation moving sleeve; 220. Lifting mechanism; 221. Lifting guide column; 222. Holding arm;

[0039] 300. Core wire conveying mechanism; 310. Wire feeder; 320. Wire inlet mechanism; 321. Hoist cage; 322. Wire inlet guide cage; 323. Wire inlet guide frame; 330. Conductor mechanism; 331. Core wire conduit;

[0040] 400. Silk cage. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] Implementation Method 1

[0043] Please refer to the following: Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a temperature measuring device 50, which includes a temperature measuring component 100, a heat insulation mechanism 200, and a core wire conveying mechanism 300. The temperature measuring component 100 includes a cored wire 110 and a temperature measuring module 120, with the cored wire 110 connected to the temperature measuring module 120. The heat insulation mechanism 200 includes a movable heat-insulating moving sleeve 210 and a lifting mechanism 220. The heat-insulating moving sleeve 210 has a cooling channel for the cored wire 110 to pass through. The lifting mechanism 220 is connected to the heat-insulating moving sleeve 210 and is used to drive the heat-insulating moving sleeve 210 in and out of the ladle refining furnace. The core wire conveying mechanism 300 is used to drive the cored wire 110 through the cooling channel and insert it to a preset depth in the molten steel to obtain a temperature signal.

[0044] Overall, when using this temperature measuring device 50, it is installed on one side of the ladle refining furnace. The device can accurately measure the temperature of the molten steel inside the furnace in real time. Specifically, by using the optical fiber cored cable 110 in conjunction with a high-precision temperature measuring module 120 such as a fiber optic demodulator or spectrometer, it can accurately measure the temperature changes of the molten steel in real time, achieving high accuracy and fast response.

[0045] Furthermore, the heat-insulating moving sleeve 210 effectively isolates the influence of high-temperature molten steel on the bright cored wire 110, preventing deformation of the wire during descent due to molten steel and high-temperature radiation, thereby improving temperature measurement accuracy. Additionally, the lifting mechanism 220 drives the heat-insulating moving sleeve 210 in and out of the ladle refining furnace, ensuring the bright cored wire 110 can quickly enter or exit the molten steel when needed, improving the convenience and safety of temperature measurement operations and facilitating automated operation.

[0046] Furthermore, the core wire conveying mechanism 300 can drive and precisely control the insertion depth of the optical core wire 110, ensuring that the temperature measuring point is in the optimal position and improving the accuracy of temperature measurement.

[0047] This utility model can achieve automated operation through the cooperation of lifting mechanism 220 and core wire conveying mechanism 300. The automated operation replaces manual temperature measurement, which not only improves work efficiency but also reduces human temperature measurement errors, and realizes a high-efficiency and stable temperature measurement process. In turn, it can improve production efficiency and energy utilization efficiency, and bring about cost reduction and efficiency improvement.

[0048] In the embodiments of this utility model, the designer may adjust the specific model and structure of the temperature measuring module 120 according to the needs of use, and no specific restrictions are made here.

[0049] In one feasible embodiment, the temperature measurement module 120 includes a fiber Bragg grating demodulator. The fiber Bragg grating demodulator utilizes a fiber Bragg grating sensor, which has extremely high temperature resolution and measurement accuracy. Furthermore, the fiber Bragg grating demodulator can acquire data from multiple fiber Bragg grating sensors in real time, ensuring continuous and dynamic monitoring of the molten steel temperature and enabling timely detection of temperature anomalies.

[0050] In another feasible embodiment, the temperature measurement module 120 includes a spectrometer. The spectrometer can cover a wider temperature measurement range, suitable for monitoring the temperature of molten steel under different operating conditions, accurately measuring from low to high temperatures. Furthermore, the spectrometer has a fast response characteristic, enabling it to complete a full temperature measurement in a short time, making it suitable for production processes requiring rapid decision-making.

[0051] In an embodiment of this utility model, the optical cored wire 110 includes an optical fiber, a ceramic fiber tape, and a metal sheath sequentially arranged from the inside out.

[0052] Among these advantages, optical fiber possesses extremely high signal transmission rates and low loss characteristics, ensuring that temperature signals remain undistorted during long-distance transmission, thereby improving the accuracy of temperature measurement. Furthermore, optical fiber is less susceptible to electromagnetic interference, guaranteeing the stability and reliability of temperature measurement data, making it particularly suitable for complex industrial environments.

[0053] Ceramic fiber tape possesses excellent thermal insulation properties, effectively isolating external heat from optical fibers in high-temperature environments and protecting them from heat damage. Furthermore, ceramic fiber tape exhibits good chemical corrosion resistance, resisting the erosion of harmful components in molten steel and extending the service life of the optical cored wire 110.

[0054] The metal sheath provides better protection for the optical cored wire 110, preventing external mechanical damage such as collisions and friction, and ensuring that the optical cored wire 110 can work stably in complex environments.

[0055] Designers can adjust the specific material and size of the metal sleeve according to the usage requirements, and no specific restrictions are imposed here. Preferably, the metal sleeve is made of low carbon steel plate with a thickness of 0.1mm-0.5mm and the outer diameter of the metal sleeve is 8mm-16mm.

[0056] For example, the thickness of the metal sleeve can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, or other values, without specific limitations. Furthermore, the outer diameter of the metal sleeve can be 8mm, 10mm, 12mm, 14mm, 16mm, or other values, without specific limitations.

[0057] In an embodiment of this utility model, the lifting mechanism 220 includes a lifting guide column 221 and at least one holding arm 222 movably disposed on the lifting guide column 221, the holding arm 222 being connected to the heat-insulating movable sleeve 210.

[0058] Specifically, the lifting guide column 221 is also equipped with a lifting drive assembly, which is used to drive the holding arm 222 to move on the lifting guide column 221.

[0059] In one feasible embodiment, the lifting drive assembly includes a gear transmission structure mounted on the lifting guide column 221, a transmission chain mounted on the gear transmission structure, and a lifting motor that drives the gear transmission structure to rotate. The transmission chain is connected to the handle arm 222. The lifting motor drives the gear transmission structure to rotate, which in turn drives the transmission chain to move the handle arm 222 in a lifting motion.

[0060] Furthermore, in order to improve the smoothness of the movement of the grip arm 222 on the lifting guide column 221, a pulley system can be provided on the grip arm 222. The grip arm 222 is slidably mounted on the lifting guide column 221 through the pulley system, thereby improving the smoothness of the movement of the grip arm 222.

[0061] Designers can adjust the setting direction of the lifting guide column 221 according to the needs of use. For example, the lifting guide column 221 can be arranged vertically, or the lifting guide column 221 can be set at a certain angle. No specific restrictions are made here.

[0062] Of course, in other feasible embodiments, designers may adjust the specific structure of the lifting drive component according to the needs of use, such as using a hydraulic cylinder for the lifting drive component, etc., without making specific limitations here.

[0063] Furthermore, in order to improve the connection stability between the holding arm 222 and the heat-insulating moving sleeve 210, multiple holding arms 222 are provided, and multiple holding arms 222 are respectively connected to the heat-insulating moving sleeve 210, thereby improving the structural stability of the heat-insulating moving sleeve 210.

[0064] In an embodiment of this utility model, the core wire conveying mechanism 300 includes a wire feeder 310, a wire inlet mechanism 320 disposed upstream of the wire feeder 310, and a conductor mechanism 330 disposed between the wire feeder 310 and the heat-insulating movable sleeve 210. The wire feeder 310 is used to drive the optical core wire 110 to enter the ladle 10 along the wire inlet mechanism 320, the conductor mechanism 330, and the heat-insulating movable sleeve 210.

[0065] Specifically, the wire feeder 310 can be equipped with at least one conveying channel, thereby enabling the conveying operation of the bright cored wire 110. The wire feeder 310 allows for precise control of the conveying speed and length of the bright cored wire 110, ensuring that the wire is accurately inserted into the preset depth of the molten steel, thus improving the accuracy of temperature measurement.

[0066] Automated wire feeding reduces manual intervention, improves work efficiency, and reduces human error, thereby achieving a highly efficient and stable temperature measurement process. Furthermore, the wire feeding mechanism 320 ensures smooth introduction of the cored wire 110, avoiding potential jamming or tangling during the feeding process.

[0067] The conductor mechanism 330 can accurately guide the optical cored wire 110 into the heat-insulating moving sleeve 210, ensuring that the optical cored wire 110 smoothly enters the ladle 10 along the heat-insulating moving sleeve 210, avoiding the risk of deviation or damage.

[0068] In this embodiment of the invention, multiple optically cored wires 110 are provided, and the wire feeding mechanism 320 and the conductor mechanism 330 are both correspondingly provided with the optically cored wires 110. Accordingly, the wire feeder 310 is provided with multiple conveying channels, thereby enabling the conveying operation of multiple optically cored wires 110.

[0069] Designers can adjust the number of optical cored wires 110 according to usage needs, and no specific restrictions are imposed here. For example, there may be two, three, four, or other quantities of optical cored wires 110.

[0070] Each optical cored wire 110 is transported through an independent inlet mechanism 320 and conductor mechanism 330, avoiding mutual interference between multiple optical cored wires 110 and ensuring that each optical cored wire 110 can accurately enter and leave the corresponding equipment, thereby improving the transmission accuracy of the optical cored wire 110 and reducing transmission failures caused by the optical cored wires 110 being tangled or overlapping.

[0071] When a single optical fiber cored wire 110 fails or needs to be replaced, the transmission process of other optical fibers will not be affected, thereby reducing the downtime of the entire production line due to a single optical fiber problem and further improving the temperature measurement stability and reliability of the system.

[0072] In an embodiment of this utility model, the infeed mechanism 320 includes a cage 321, an infeed guide cage 322, and an infeed guide frame 323 arranged sequentially along the infeed direction of the optical core wire 110.

[0073] The optical fiber cored wire 110 can be smoothly led out through the cage 321, and is initially guided and supported to ensure that the optical fiber cored wire 110 can smoothly enter the subsequent equipment.

[0074] Furthermore, when there are multiple optical cored wires 110, the hanging cage 321 can also prevent the multiple optical cored wires 110 from getting tangled or knotted, making the optical cored wires 110 neat and orderly and reducing the failure rate.

[0075] Furthermore, the inlet guide cage 322 serves as an intermediate transition section, providing a straightening effect for the optical cored wire 110, reducing the degree of bending of the optical cored wire 110, and improving the smoothness of the optical cored wire 110's inlet.

[0076] The wire guide 323 can accurately guide the straightened cored wire 110 to the wire feeder 310, ensuring that the cored wire 110 is in the best condition when it enters the wire feeder 310, and avoiding jamming or damage caused by positional deviation.

[0077] Designers may adjust the specific shape and structure of the hoist cage 321, the inlet guide cage 322, and the inlet guide frame 323 according to the needs of use, without making specific restrictions here.

[0078] In an embodiment of this utility model, the conductor mechanism 330 includes a core wire conduit 331, which is used to guide the optically coated core wire 110 output by the wire feeder 310 to the heat-insulating movable sleeve 210.

[0079] The core wire conduit 331 ensures that the optically coated core wire 110 can accurately enter the heat-insulated moving sleeve 210 after being output from the wire feeder 310, avoiding jamming or damage caused by path deviation and improving the conveying accuracy.

[0080] By reasonably adjusting the diameter and shape of the core wire conduit 331, the core wire conduit 331 can effectively prevent problems such as twisting, knotting or excessive bending of the optical core wire 110 during transportation, thus ensuring the smooth transportation of the optical core wire 110.

[0081] Designers can adjust the specific shape and structure of the core wire conduit 331 according to the needs of use. For example, the core wire conduit 331 can be L-shaped and the bends of the core wire conduit 331 can be smoothly transitioned. No specific restrictions are imposed here.

[0082] Furthermore, when there are multiple optical cored wires 110, there can also be multiple cored wire conduits 331, so that each optical cored wire 110 can be transported independently.

[0083] In this configuration, each core wire conduit 331 is arranged at intervals near one end of the wire feeder 310 to allow wires to enter separately, while the other ends of each core wire conduit 331 are clustered together to guide each optically coated core wire 110 into the heat-insulating movable sleeve 210.

[0084] In an embodiment of this utility model, the temperature measuring device 50 further includes a wire cage 400, which is arranged upstream of the wire feeding mechanism 320 and is used to hold the optical cored wire 110.

[0085] By using the wire cage 400 to store the optical cored wire 110, the optical cored wire 110 becomes more neat and orderly, avoiding the problem of the optical cored wire 110 becoming tangled or knotted before entering the wire feeding mechanism 320.

[0086] Among them, the wire cage 400, together with the hanging cage 321, the inlet guide cage 322, and the inlet guide frame 323, form a complete inlet system, ensuring that the entire process of optical cored wire 110 from storage to transportation is more stable and orderly.

[0087] Specifically, the wire cage 400 is positioned below the hanging cage 321, allowing the optical cored wire 110 to enter the feeding mechanism 320 upwards. When multiple optical cored wires 110 are provided, correspondingly, multiple wire cages 400 can also be provided, enabling each optical cored wire 110 to be stored and fed independently. Designers can adjust the specific shape and structure of the wire cage 400 according to usage needs; no specific limitations are imposed here.

[0088] In this embodiment of the invention, the temperature measuring device 50 further includes an alarm device 130, which is located at the tail end of the optical core-coated wire 110. Designers can adjust the specific usage of the alarm device 130 according to their needs; no specific limitations are imposed here.

[0089] For example, the alarm device 130 can monitor the temperature change at the tail of the optical fiber cored cable 110 in real time. If the temperature exceeds the preset safety threshold, the alarm device 130 will immediately issue an alarm signal to remind the operator to take measures to prevent damage to the optical fiber or fire hazards caused by high temperature.

[0090] In addition to temperature, the alarm device 130 can also monitor other status parameters of the optical core wire 110 (such as breakage, loosening, etc.). Once an abnormality is detected, the alarm device 130 will promptly notify relevant personnel to ensure that the problem is addressed in its early stages.

[0091] By installing an alarm device 130 at the end of the optical fiber cored cable 110, a timely warning can be given before potential faults occur, thus avoiding safety accidents caused by optical fiber overheating, short circuits, and other problems, and protecting the safety of equipment and personnel.

[0092] Implementation Method 2

[0093] Please refer to the following: Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a ladle refining furnace, which includes the temperature measuring device 50 described in Embodiment 1. The specific structure, working principle, and beneficial effects of the temperature measuring device 50 are the same as those described in Embodiment 1, and will not be repeated here.

[0094] In an embodiment of this utility model, the ladle refining furnace includes a ladle 10, a water-cooled cover 20 disposed on the ladle 10, and an electrode assembly 30. The water-cooled cover 20 is provided with an optical fiber temperature measuring hole 21, and the heat-insulating movable sleeve 210 of the temperature measuring device 50 is vertically and flexibly inserted into the optical fiber temperature measuring hole 21.

[0095] Specifically, the electrode assembly 30 includes a conductive cross arm 31 and an electrode 32 disposed on the conductive cross arm 31, the electrode 32 being able to be inserted into the ladle 10.

[0096] Furthermore, multiple conductive cross arms 31 and electrodes 32 are provided, and the multiple electrodes 32 work together to achieve a heating effect. Designers can adjust the specific number and arrangement of conductive cross arms 31 and electrodes 32 according to the needs of use, and no specific restrictions are imposed here. For example, three conductive cross arms 31 and three electrodes 32 are provided to form a three-electrode assembly 30.

[0097] Furthermore, to improve the operational flexibility of the conductive crossarm 31 and electrode 32, the ladle refining furnace also includes a heating lifting mechanism, which enables the conductive crossarm 31 and electrode 32 to move up and down. Designers can adjust the specific structure of the heating lifting mechanism according to their needs; no specific limitations are set here.

[0098] In this embodiment of the invention, the ladle refining furnace further includes a weighing device 40, which is used to measure the weight of the ladle 10. Designers can adjust the specific structure of the weighing device 40 according to usage requirements, and no specific limitations are imposed here. For example, the weighing device 40 can be a ladle car with a weighing function.

[0099] By measuring the weight of the ladle 10, the liquid level of the molten steel inside the ladle 10 can be determined, thereby determining the descent depth of the heat-insulating moving sleeve 210 and the temperature-measuring optical core wire 110.

[0100] Furthermore, this utility model also provides a working method for a ladle refining furnace, specifically including the following steps: a ladle car is filled with molten steel; a water-cooled cover 20 is lowered and fastened to the upper edge of the ladle 10; a three-phase conductive crossarm 31 with electrodes 32 is lowered to heat the molten steel; a heat-insulating movable sleeve 210 is lowered; a wire feeder 310 feeds in a cored wire 110; the cored wire 110 enters the molten steel; an optical fiber transmits the spectral signal to a fiber optic demodulator; the fiber optic demodulator converts the spectral signal into a temperature signal and transmits it to a metallurgical model; a weighing device 40 transmits the weight of the molten steel to an intelligent model; the intelligent model collects information such as added materials, power supply, molten steel temperature, and molten steel weight; the intelligent model combines machine learning algorithms and expert models for analysis and decision-making; the intelligent model provides guidance information for the next refining operation; measurements are taken every 1 to 5 minutes.

[0101] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0102] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A temperature measuring device, characterized by, The temperature measuring device comprises: a temperature measuring assembly comprising an optical cored wire and a temperature measuring module, the optical cored wire being connected with the temperature measuring module; a heat insulation mechanism comprising a movable heat insulation moving sleeve having a cooling channel for the optical cored wire to pass through, and a lifting mechanism connected with the heat insulation moving sleeve, the lifting mechanism being used to drive the heat insulation moving sleeve to move in and out of the ladle refining furnace; a cored wire conveying mechanism used to drive the optical cored wire to pass through the cooling channel and be inserted into molten steel to a preset depth to obtain a temperature signal.

2. The temperature measuring device according to claim 1, wherein The temperature measuring module comprises one of a fiber grating demodulator or a spectrometer.

3. The temperature measuring device according to claim 1, wherein The optical cored wire comprises, from inside to outside, an optical fiber, a ceramic fiber belt and a metal sleeve.

4. The temperature measuring device according to claim 3, wherein The metal sleeve is rolled from a low-carbon steel plate with a thickness of 0.1-0.5 mm, and the outer diameter of the metal sleeve is 8-16 mm.

5. The temperature measuring device of claim 1, wherein The lifting mechanism comprises a lifting guide column and at least one holding arm movably arranged on the lifting guide column, the holding arm being connected with the heat insulation moving sleeve.

6. The temperature measuring device of claim 1, wherein The cored wire conveying mechanism comprises a wire feeder, a wire feeding mechanism arranged upstream of the wire feeder, and a wire guiding mechanism arranged between the wire feeder and the heat insulation moving sleeve, the wire feeder being used to drive the optical cored wire to enter the ladle along the wire feeding mechanism, the wire guiding mechanism and the heat insulation moving sleeve.

7. The temperature measuring device of claim 6, wherein The wire feeding mechanism comprises, in sequence along the wire feeding direction of the optical cored wire, a wire cage, a wire feeding guide cage and a wire feeding guide frame.

8. The temperature measuring device of claim 6, wherein The wire guiding mechanism comprises a cored wire guide pipe used to guide the optical cored wire output by the wire feeder to the heat insulation moving sleeve.

9. The temperature measuring device of claim 6, wherein The temperature measuring device further comprises a wire cage arranged upstream of the wire feeding mechanism, the wire cage being used to place the optical cored wire.

10. The temperature measuring device of claim 6, wherein A plurality of optical cored wires are provided, and the wire feeding mechanism and the wire guiding mechanism are arranged correspondingly to the optical cored wires.

11. The temperature measuring device of claim 1, wherein The temperature measuring device further comprises an alarm device arranged at the tail of the optical cored wire.

12. A ladle furnace characterized by The temperature measuring device comprises any one of claims 1-11.

13. The ladle refining furnace of claim 12, wherein The ladle refining furnace comprises a ladle, a water-cooled cover arranged on the ladle, and an electrode assembly, the water-cooled cover being provided with an optical fiber temperature measuring hole, and the heat insulation moving sleeve of the temperature measuring device being inserted into the optical fiber temperature measuring hole in a lifting manner.

14. The ladle refining furnace of claim 13, wherein The electrode assembly comprises a conductive cross arm and an electrode arranged on the conductive cross arm, the electrode being capable of being inserted into the ladle.

15. The ladle furnace as claimed in claim 12, wherein The ladle refining furnace further comprises a weighing device used to measure the weight of the ladle.

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