A ladle structure with safety detection function

Abstract

The present application relates to the technical field of hot metal ladle structure, and specifically relates to a hot metal ladle structure with safety detection function, which comprises a hot metal ladle body and a protective package arranged outside the hot metal ladle body, and a closed annular cavity is formed between the hot metal ladle body and the protective package. A plurality of air pressure detection assemblies are arranged on the top of the protective package, a plurality of temperature detection assemblies are arranged on the sidewall of the protective package along the height direction, and the bottom of the annular cavity is blocked by a detachable bottom disc and filled with a composite phase change blocking filler. The present application realizes height positioning of a leakage point by using the time difference of thermal pressure rise through multi-layer redundant detection of air pressure and temperature, and has high detection accuracy and strong anti-false alarm capability. The blocking filler absorbs heat and self-reinforces blocking when meeting hot metal, can be disintegrated and discharged by introducing specific gas afterwards, and is convenient for reuse. In combination with an anti-sticking coating, the present application effectively avoids hot metal sticking to the wall. The present application integrates safety isolation, accurate detection, high-temperature self-blocking and convenient maintenance, and significantly improves the safety and reliability of the hot metal ladle transfer process.

Description

Technical Field

[0001] This invention relates to the technical field of molten iron ladle structures, specifically a molten steel ladle structure with safety detection function. Background Technology

[0002] Ladles of molten iron and steel are indispensable transfer and pouring containers in the metallurgical industry, containing molten metal at temperatures exceeding 1400℃. During long-term use, due to erosion of the refractory lining, thermal shock cracks caused by rapid heating and cooling, and fatigue damage to the ladle's metal structure, molten iron ladles are highly susceptible to leakage of high-temperature molten metal and even ladle penetration accidents. Once a leak occurs, the high-temperature molten iron spills directly, not only burning surrounding equipment and causing major fires, but also posing a direct threat to the lives of on-site personnel. Therefore, real-time and accurate leakage safety monitoring of molten iron ladles, and effective sealing and isolation when leaks occur, are core issues that urgently need to be addressed in the field of metallurgical safety production.

[0003] Currently, existing technologies for the protection and detection of molten iron ladle leaks have the following main shortcomings:

[0004] Firstly, existing protective structures mostly use single-layer shells or simple outer baffles, lacking a closed annular cavity design. When the ladle body leaks, the leaking high-temperature molten iron will flow directly out of the ladle body, making it impossible to guide the leak to a specific area for centralized monitoring and sealing. This results in delayed leak detection, and the leaking high-temperature molten metal flows everywhere, which can easily cause secondary accidents.

[0005] Secondly, in terms of leak detection, traditional detection methods are relatively simple, usually relying solely on manual visual observation or a single type of sensor (such as a single thermocouple) for judgment. This detection method is easily affected by factors such as ambient temperature fluctuations and sensor operating condition drift, resulting in a high false alarm rate and a high false negative rate. At the same time, a single sensor cannot achieve spatial positioning of the leak point's height, which brings great difficulties to subsequent emergency repair and troubleshooting work.

[0006] Third, existing technologies lack a sealing material that can effectively seal the bottom of the annular cavity to ensure a stable testing environment, rapidly absorb the heat of molten iron and strengthen its own sealing power when a leak occurs, and is easy to clean and reusable afterward. Conventional refractory castables or sealants can provide some protection after contact with high-temperature molten iron, but they often crack and fail under high-temperature impact, or cannot be removed after curing, making the entire protective structure a disposable item with extremely high maintenance costs.

[0007] Fourth, leaked high-temperature molten iron easily adheres to the inner wall of the protective ladle or the outer wall of the ladle, solidifying into hard iron nodules upon cooling. These nodules are not only difficult to remove, but also occupy the annular cavity space, affecting the detection accuracy of subsequent sensors, and even blocking the filling channels and venting paths of the sealing packing, severely weakening the long-term reliability and service life of the protection system. Summary of the Invention

[0008] The purpose of this invention is to provide a steel ladle structure with safety detection function to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A steel ladle structure with safety detection function includes a ladle body, handles installed on both sides of the top of the ladle body, and further includes:

[0011] The protective bag is installed on the outside of the molten iron ladle body. The inner wall of the protective bag and the outer wall of the molten iron ladle body form an annular cavity. The top of the protective bag is closed, and the bottom of the protective bag is detachably equipped with a chassis. An addition pipe is provided on one side of the lower part of the protective bag.

[0012] A number of air pressure detection components are installed on the top of the protective bag in a circular pattern to detect the air pressure at the top of the annular cavity in real time.

[0013] The temperature detection components are arranged in several layers along the height of the protective bag. Each layer is equipped with several temperature detection components, which are evenly distributed around the circumference and installed on the protective bag to detect the internal temperature of the annular cavity in real time.

[0014] The sealing packing is injected into the annular cavity through the addition pipe and seals the bottom of the annular cavity. When the sealing packing comes into contact with the leaking molten iron, it can absorb a large amount of heat and strengthen itself to reinforce the seal at the bottom of the annular cavity.

[0015] The control box is connected to the air pressure detection component and the temperature detection component. When the detection results indicate that there is molten iron leakage in the annular cavity, an alarm is issued.

[0016] As a further embodiment of the present invention: the air pressure detection component includes a pressure sensor and a pressure guiding tube. The pressure sensor is installed on the top of the protective bag, the top end of the pressure guiding tube is connected to the input end of the pressure sensor, and the bottom end of the pressure guiding tube extends into the annular cavity with the tube opening tilted downwards away from the body of the molten iron ladle.

[0017] As a further embodiment of the present invention: the temperature detection component includes a temperature sensor and a thermocouple. The temperature sensor is installed on the outer wall of the protective bag, one end of the thermocouple is connected to the input end of the temperature sensor, and the other end of the thermocouple extends into the annular cavity.

[0018] As a further embodiment of the present invention: the temperature detection component further includes an annular conical plate, the outer periphery of which is mounted on the inner wall of the protective bag above the thermocouple, the inner diameter of which gradually decreases from top to bottom, and the thermocouple is shielded by the area between the outer wall of the annular conical plate and the inner wall of the protective bag.

[0019] As a further embodiment of the present invention: a first annular plate is integrally formed on the top periphery of the molten iron ladle body, and a second annular plate and a third annular plate are respectively provided on the top inner periphery and bottom periphery of the protective ladle. The first annular plate and the second annular plate are fixed together by bolts, and the third annular plate is fixed together with the outer periphery of the chassis by bolts.

[0020] As a further embodiment of the present invention: the sealing filler uses low melting point glass powder and high alumina bauxite clinker as aggregates. At room temperature, the filler is stirred into a slurry with a phosphate binder and then injected into the annular cavity. After being baked and cured at 200°C, a dense sealing layer is formed.

[0021] As a further embodiment of the present invention: 5% to 8% silicon carbide micro powder and 3% metallic aluminum powder are incorporated into the matrix of the sealing filler.

[0022] As a further embodiment of the present invention: the outer wall of the molten iron ladle body and the inner wall of the protective ladle are both coated with a layer of boron nitride-based high-temperature coating.

[0023] The present invention has the following advantages:

[0024] 1. This invention, by setting a protective casing around the molten iron ladle body to form a closed annular cavity, and simultaneously installing a detachable chassis at the bottom of the protective casing, ensures that in the event of a leak in the molten iron ladle body, the leaked molten iron is completely confined within the annular cavity, preventing it from overflowing into the working environment and eliminating secondary disasters caused by the free flow of high-temperature molten metal. The bottom of the annular cavity is sealed with packing material, which, in conjunction with the pressure detection component at the top, forms a sealed pressure monitoring space. This ensures that the pressure sensor can sensitively detect changes in the internal pressure caused by a leak, greatly improving the sensitivity and reliability of leak detection.

[0025] 2. This invention features a circumferentially distributed pneumatic detection assembly (pressure sensor + pressure guide tube) at the top of the protective package, along with multiple layers of temperature detection assemblies (temperature sensor + thermocouple) along the height of the protective package, forming a spatially redundant detection system. The pneumatic detection assembly, with its downward-sloping pressure guide tube opening, effectively prevents molten iron splashing and dust blockage, ensuring unobstructed pressure detection channels during long-term operation. The temperature detection assembly utilizes the shielding structure of a ring-shaped conical plate to prevent the thermocouple from being directly washed away and burned by falling molten iron. Simultaneously, it leverages the characteristic of hot gas rising along the outer wall of the conical plate to accurately detect leaked heat. By setting up multiple layers of temperature detection assemblies, and utilizing the time difference (Δt) of the hot gas expanding from bottom to top during a leak, the detection module within the control box can infer the approximate height of the leak point. This provides crucial data support for maintenance personnel to quickly locate the leak and formulate emergency repair plans, significantly shortening accident handling time. Meanwhile, the redundant detection logic with multiple measurement points and multiple types (such as the midpoint judgment of multiple sensors) effectively overcomes the defect of a single sensor being susceptible to interference from ambient temperature fluctuations, and significantly reduces the false alarm rate.

[0026] 3. This invention uses a composite sealing filler made of low-melting-point glass powder and high-alumina bauxite clinker as aggregates, phosphate as a binder, and incorporating silicon carbide micro powder and metallic aluminum powder. Under normal operating conditions, after being baked and cured at 200℃, the filler forms a dense sealing layer with a strength ≥30MPa, which can completely seal the bottom of the annular cavity, ensuring the airtightness of the pressure detection environment and allowing the pressure detection component to operate above a stable reference pressure. When leakage occurs, when molten iron at 1400℃ or higher comes into contact with the filler, the metallic aluminum powder melts and oxidizes instantly, absorbing a large amount of heat and playing a significant heat absorption buffering role, preventing the filler from cracking due to rapid heating; at the same time, the generated Al2O3 reacts with phosphate to form a mullite phase ceramic bond, increasing the filler strength from 30MPa to over 50MPa, achieving self-strengthening at high temperatures, firmly sealing the bottom of the annular cavity, and forming a second strong barrier. Meanwhile, both the outer wall of the molten iron ladle and the inner wall of the protective ladle are coated with a boron nitride-based high-temperature coating. During post-cleaning, only ammonium bifluoride vapor needs to be introduced through the addition pipe. At 200-300℃, it reacts with the phosphate glass phase, causing the packing material to disintegrate into powder. The originally solidified molten iron shell then crumbles, and all solid waste can be easily discharged by removing the chassis. After cleaning, new packing material can be injected to restore the system's usability, achieving reusability of the sealing system and significantly reducing maintenance costs and equipment downtime. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall external structure of an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the overall disassembly structure of an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the overall internal structure of an embodiment of the present invention.

[0030] Figure 4 for Figure 3 Enlarged diagram of part A in the image.

[0031] Figure 5 for Figure 3 Enlarged diagram of part B in the diagram.

[0032] In the diagram: 1. Ladle body; 101. Handle; 102. First annular plate; 2. Protective bag; 201. Second annular plate; 202. Adding pipe; 203. Annular cavity; 204. Third annular plate; 3. Air pressure detection assembly; 301. Pressure sensor; 302. Pressure guide pipe; 4. Temperature detection assembly; 401. Temperature sensor; 402. Thermocouple; 403. Annular cone plate; 5. Control box; 501. Detection module; 502. Alarm; 6. Chassis; 7. Sealing packing; 8. First sealing ring; 9. Second sealing ring. Detailed Implementation

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0035] Example 1: Please refer to Figures 1 to 5 A steel ladle structure with safety detection function includes a ladle body 1, handles 101 installed on both sides of the top of the ladle body 1, and further includes:

[0036] The protective bag 2 is installed on the periphery of the molten iron ladle body 1. An annular cavity 203 is formed between the inner wall of the protective bag 2 and the outer wall of the molten iron ladle body 1. The top of the protective bag 2 is closed. The bottom of the protective bag 2 is detachably equipped with a chassis 6. An adding pipe 202 is provided on one side of the lower part of the protective bag 2.

[0037] The air pressure detection components 3 are installed on the top of the protective bag 2 in a circular and evenly distributed manner to detect the air pressure at the top of the annular cavity 203 in real time.

[0038] Temperature detection components 4 are arranged in several layers along the height direction of the protective bag 2. Each layer is equipped with several temperature detection components 4 and they are evenly distributed around the circumference of the protective bag 2. They are used to detect the internal temperature of the annular cavity 203 in real time.

[0039] The sealing packing 7 is injected into the annular cavity 203 through the addition pipe 202 and seals the bottom of the annular cavity 203. When the sealing packing 7 comes into contact with the leaking molten iron, it can absorb a large amount of heat and strengthen its own strength to reinforce the seal of the bottom of the annular cavity 203.

[0040] The control box 5 is installed on the outer wall of the protective package 2 and is connected to the air pressure detection component 3 and the temperature detection component 4. When the detection results indicate that there is molten iron leakage in the annular cavity 203, an alarm is triggered. The control box 5 is equipped with a detection module 501 and an alarm 502. The air pressure detection component 3, the temperature detection component 4, and the alarm 502 are all connected to the detection module 501.

[0041] The air pressure detection assembly 3 includes a pressure sensor 301 and a pressure guiding tube 302. The pressure sensor 301 is installed on the top of the protective bag 2. The top end of the pressure guiding tube 302 is connected to the input end of the pressure sensor 301, and the bottom end of the pressure guiding tube 302 extends into the annular cavity 203 with its opening tilted downwards away from the molten iron ladle body 1 to prevent molten iron from splashing or dust from rising and clogging the opening. The pressure guiding tube 302 is fixed to the top of the protective bag 2 by welding or threaded connection, and its material is heat-resistant stainless steel.

[0042] The temperature detection assembly 4 includes a temperature sensor 401 and a thermocouple 402. The temperature sensor 401 is mounted on the outer wall of the protective casing 2. One end of the thermocouple 402 is connected to the input end of the temperature sensor 401, and the other end of the thermocouple 402 extends into the annular cavity 203. The temperature detection assembly 4 also includes an annular cone plate 403. The outer periphery of the annular cone plate 403 is fixed to the inner wall of the protective casing 2 above the thermocouple 402 by welding or bolts. The inner diameter of the annular cone plate 403 gradually decreases from top to bottom, and the thermocouple 402 is shielded by the area between the outer wall of the annular cone plate 403 and the inner wall of the protective casing 2. When molten iron leaks and flows downward, it will flow along the inner wall of the annular cone plate 403 and will not come into contact with the thermocouple 402. After the molten iron falls onto the sealing packing 7, the generated hot air will rise and drift upward along the outer wall of the annular cone plate 403 to the location of the thermocouple 402 for temperature detection. The temperature detection component 4 has at least two layers, upper and lower. When a leak occurs, the hot-pressed gas expands from the bottom upwards, triggering the lower sensor first, and then the upper sensor. By using the time difference Δt between the triggering of the upper and lower sensors, combined with the rising flow velocity of the hot-pressed gas in the annular cavity 203, the approximate height of the leak point can be deduced, facilitating rapid location of the leak during maintenance.

[0043] The top periphery of the molten iron ladle body 1 is integrally formed with a first annular plate 102. The top inner periphery and bottom periphery of the protective ladle 2 are respectively provided with a second annular plate 201 and a third annular plate 204. The first annular plate 102 and the second annular plate 201 are fixedly connected by bolts, and the third annular plate 204 is fixedly connected to the periphery of the chassis 6 by bolts. A first sealing ring 8 and a second sealing ring 9 are respectively clamped at the connection between the first annular plate 102 and the second annular plate 201, and at the connection between the third annular plate 204 and the periphery of the chassis 6. Both the first sealing ring 8 and the second sealing ring 9 are high-temperature resistant graphite-reinforced metal spiral wound gaskets.

[0044] Example 2: Based on Example 1, the sealing filler 7 uses low-melting-point glass powder (melting point approximately 450~550℃) and high-alumina bauxite clinker as aggregates. At room temperature, it is stirred into a slurry with a phosphate binder and then injected into the annular cavity 203 through the addition pipe 202. The base plate 6 is then heated and cured at 200℃, forming a dense sealing layer (room temperature strength ≥30MPa, meeting pressure-holding sealing requirements). In this example, the addition pipe 202 serves both as an injection pipe and a venting pipe, and its opening is equipped with a sealing plug to maintain a closed state when not in use.

[0045] The sealing filler 7 contains 5% to 8% silicon carbide micro powder and 3% metallic aluminum powder in its matrix. When molten iron at temperatures above 1400°C leaks down and comes into contact with the filler, the metallic aluminum powder melts and oxidizes instantly, absorbing a large amount of heat (endothermic function). The Al2O3 generated by aluminum oxidation reacts with the phosphate binder to form a ceramic bonding phase (mullite precursor), which increases the strength of the filler (the pressure resistance increases from 30MPa to over 50MPa), firmly sealing the bottom of the annular cavity 203.

[0046] The entire outer wall of the ladle body 1 and the entire inner wall of the protective ladle 2 (including the surface of the annular cone plate 403) are coated with a layer of boron nitride-based high-temperature coating (thickness 0.3~0.5mm). Boron nitride has extremely high lubricity and non-wetting properties. Molten iron will form spherical beads on the surface of boron nitride, which cannot be wetted and spread. After cooling, it shrinks and automatically peels off, and will not adhere to the steel plate.

[0047] When molten iron leaks into the annular cavity 203 and needs cleaning, ammonium bifluoride vapor is introduced into the annular cavity 203 through the addition pipe 202, taking care to treat the exhaust gas. This gas reacts with the phosphate glass phase at 200-300℃, destroying its network structure and causing the solidified filler to disintegrate into powder, losing its strength. At this time, the molten iron shell originally solidified on the filler (due to the damage to the bottom) will shatter. After removing the base plate 6, the molten iron will naturally drain through the bottom port of the protective bag 2. After cleaning, the base plate 6 is reinstalled, and new filler is injected to restore the cavity.

[0048] The protective casing 2, chassis 6, and adding pipe 202 are all welded from heat-resistant steel Q345R or stainless steel plate of grade 06Cr19Ni10, with a wall thickness of not less than 12mm, to ensure sufficient high-temperature creep strength and structural stability under high-temperature radiation and impact from molten iron leakage. All bolted connections are made of heat-resistant alloy steel 35CrMoA and are equipped with a high-temperature anti-seize coating.

[0049] Both the pressure sensor 301 and the temperature sensor 401 are electrically connected to the analog input port of the detection module 501 via shielded cables. The pressure sensor 301 is a diffused silicon high-temperature diaphragm pressure transmitter with a range of -0.1 to 2.0 MPa and an output signal of 4 to 20 mA. Its diaphragm material is Hastelloy, and its accuracy class is 0.25. A specific model can be PDS403H-1ES0-A1DA / G61. The temperature sensor 401 is a K-type thermocouple temperature transmitter with a measurement range of 0 to 800℃, an output signal of 4 to 20 mA, and an accuracy class of 1. A specific model can be SBWZ-2480 / NF.

[0050] The detection module 501 is integrated inside the control box 5 and includes a PLC programmable logic controller (PLC) of model S7-1200 (optional), an analog input expansion module SM1231, and an industrial touch screen display. The detection module 501 has a built-in microprocessor and a fixed algorithm, with internally set upper limit thresholds for air pressure and temperature rise rate. During normal operation, the detection module 501 collects the air pressure and temperature values ​​within the annular cavity 203 in real time through its analog input port and executes a temperature and pressure compensation algorithm (subtracting the influence of natural fluctuations in ambient temperature on air pressure). When the detection module 501 determines that the real-time air pressure value exceeds the upper limit threshold, and is simultaneously accompanied by an abnormal temperature gradient increase, it determines that a molten iron leakage event has occurred. At this time, the detection module 501 outputs a high-level drive signal to the alarm 502, and the alarm 502 issues an audible and visual alarm. Simultaneously, the detection module 501 automatically calculates and displays the estimated height of the leak point by recording the time difference between the triggering of the upper and lower layer temperature sensors 401, allowing on-site personnel to quickly investigate. Both the pressure sensor 301 and the temperature sensor 401 are electrically connected to the analog input port of the detection module 501 via shielded cables. The detection module 501 has a built-in microprocessor and a fixed algorithm, internally set with upper limit thresholds for air pressure and temperature rise rate. During normal operation, the detection module 501 collects the air pressure and temperature values ​​within the annular cavity 203 in real time and executes a temperature and pressure compensation algorithm (subtracting the influence of natural fluctuations in ambient temperature on air pressure). When the detection module 501 determines that the real-time air pressure value exceeds the upper limit threshold, and is simultaneously accompanied by an abnormal temperature gradient increase, it determines that a molten iron leakage event has occurred. At this time, the detection module 501 outputs a high-level drive signal to the alarm 502, and the alarm 502 issues an audible and visual alarm. Simultaneously, the detection module 501 automatically calculates and displays the estimated height of the leak point by recording the time difference between the triggering of the upper and lower temperature sensors 401, allowing on-site personnel to quickly investigate.

[0051] The working principle of this invention is as follows:

[0052] This invention constructs a fully enclosed annular cavity 203, completely limiting potential leakage accidents of the molten iron ladle body 1 to a controllable range. Under normal operating conditions, after the sealing filler 7 solidifies, it tightly seals the bottom of the annular cavity 203, creating a relatively sealed air pressure environment inside the annular cavity 203, providing a stable reference pressure for the air pressure detection component 3.

[0053] When the ladle body 1 leaks due to lining erosion or thermal shock cracks, the high-temperature molten iron first penetrates the ladle wall and enters the annular cavity 203. During the molten iron's descent, it is blocked and guided by the annular cone plate 403, preventing it from directly impacting the thermocouple 402. Instead, it slides down the inner wall of the annular cone plate 403 onto the sealing packing 7 at the bottom of the annular cavity 203. During this process, the large amount of heat released by the high-temperature molten iron causes the air inside the annular cavity 203 to expand rapidly, resulting in a sudden increase in the cavity's air pressure. This pressure change is transmitted to the pressure sensor 301 via the pressure guide pipe 302. Simultaneously, the hot-pressurized gas rises along the outer wall of the annular cone plate 403, sequentially triggering the thermocouples 402 in each layer of the temperature detection assembly 4, thereby transmitting the temperature signal to the temperature sensor 401.

[0054] Upon contact with molten iron, the sealing filler 7 at the bottom undergoes a molten oxidation reaction with its internal aluminum powder, absorbing a large amount of sensible heat from the molten iron and acting as a buffer against thermal shock. Simultaneously, the oxidation products react with the binder to form a ceramic bonding phase, significantly increasing the filler's strength and effectively preventing further seepage of molten iron, achieving self-reinforcing sealing at high temperatures. The boron nitride coating brushed onto the inner wall surfaces ensures that falling molten iron cannot wet or adhere to it; after cooling and solidifying, it shrinks and detaches itself, ultimately falling into the filler layer on the chassis 6.

[0055] In post-incident handling, only specific ammonium bifluoride vapor needs to be introduced through the addition pipe 202 to disintegrate the solidified sealing filler 7 into powder, causing it to lose its supporting force. At this time, the solidified molten iron shell is discharged from the disassembled chassis 6 port. After thorough cleaning, new filler is injected to restore the complete protective function. The entire system realizes a complete closed-loop operation from leakage occurrence, accurate detection, automatic sealing to rapid post-incident repair. The components of this invention are all general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. For those skilled in the art, it is obvious that this invention is not limited to the details of the above exemplary embodiments, and that the invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description, and therefore all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A steel ladle structure with safety detection function, comprising a ladle body, with handles installed on both sides of the top of the ladle body, characterized in that, Also includes: The protective bag is installed on the outside of the molten iron ladle body. The inner wall of the protective bag and the outer wall of the molten iron ladle body form an annular cavity. The top of the protective bag is closed, and the bottom of the protective bag is detachably equipped with a chassis. An addition pipe is provided on one side of the lower part of the protective bag. A number of air pressure detection components are installed on the top of the protective bag in a circular pattern to detect the air pressure at the top of the annular cavity in real time. The temperature detection components are arranged in several layers along the height of the protective bag. Each layer is equipped with several temperature detection components, which are evenly distributed around the circumference and installed on the protective bag to detect the internal temperature of the annular cavity in real time. The sealing packing is injected into the annular cavity through the addition pipe and seals the bottom of the annular cavity. When the sealing packing comes into contact with the leaking molten iron, it can absorb a large amount of heat and strengthen itself to reinforce the seal at the bottom of the annular cavity. The control box is connected to the air pressure detection component and the temperature detection component. When the detection results indicate that there is molten iron leakage in the annular cavity, an alarm is issued.

2. The steel ladle structure with safety detection function according to claim 1, characterized in that, The air pressure detection component includes a pressure sensor and a pressure guide tube. The pressure sensor is installed on the top of the protective bag. The top end of the pressure guide tube is connected to the input end of the pressure sensor. The bottom end of the pressure guide tube extends into the annular cavity and the tube opening is tilted downwards away from the body of the molten iron ladle.

3. A steel ladle structure with safety detection function according to claim 1, characterized in that, The temperature detection assembly includes a temperature sensor and a thermocouple. The temperature sensor is installed on the outer wall of the protective bag, one end of the thermocouple is connected to the input end of the temperature sensor, and the other end of the thermocouple extends into the annular cavity.

4. A steel ladle structure with safety detection function according to claim 3, characterized in that, The temperature detection assembly also includes an annular conical plate, the outer periphery of which is mounted on the inner wall of the protective bag above the thermocouple. The inner diameter of the annular conical plate gradually decreases from top to bottom, and the thermocouple is shielded by the area between the outer wall of the annular conical plate and the inner wall of the protective bag.

5. A steel ladle structure with safety detection function according to claim 1, characterized in that, The top periphery of the molten iron ladle is integrally formed with a first annular plate, and the top inner periphery and bottom periphery of the protective ladle are respectively provided with a second annular plate and a third annular plate. The first annular plate and the second annular plate are fixed together by bolts, and the third annular plate is fixed together with the periphery of the chassis by bolts.

6. A steel ladle structure with safety detection function according to claim 1, characterized in that, The sealing filler uses low-melting-point glass powder and high-alumina bauxite clinker as aggregates. At room temperature, it is stirred into a slurry with a phosphate binder and then injected into the annular cavity. After being baked and cured at 200°C, a dense sealing layer is formed.

7. A steel ladle structure with safety detection function according to claim 6, characterized in that, The plugging filler matrix contains 5% to 8% silicon carbide micro powder and 3% metallic aluminum powder.

8. A steel ladle structure with safety detection function according to claim 1, characterized in that, Both the outer wall of the molten iron ladle and the inner wall of the protective ladle are coated with a layer of boron nitride-based high-temperature coating.

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