Blast furnace charge level detection device, blast furnace and charge level detection control method of blast furnace

Abstract

The invention discloses a blast furnace charge level detection device, a blast furnace and a charge level detection control method of the blast furnace. The blast furnace charge level detection device comprises a shell, a winding drum, a stock rod, a driving motor, a rotation detector, a cooling assembly, a temperature detector and a controller, and the driving motor drives the winding drum to rotate; the rotation detector detects the number of rotation turns and the rotation speed of the output end of the driving motor; the cooling assembly is used for cooling the stock rod; the temperature detector is used for detecting the temperature of the stock rod; the controller is configured to obtain the height of the charge level according to the number of rotation turns, and the controller is configured to control the cooling assembly to cool the stock rod in different cooling modes according to the temperature of the balance weight and the height of the charge level. The charge level height is detected through the driving motor and the rotary detector, the cooling assembly is controlled to cool the stock rod and reduce the surface temperature of the stock rod through the height and temperature dual conditions, the probability of failure of the stock rod due to high temperature is further reduced, the use stability of the device is improved, and the detection efficiency and accuracy are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of blast furnace metallurgical equipment, and in particular relates to a blast furnace material level detection device, a blast furnace and a material level detection and control method thereof. Background Art

[0002] Lowering the charge level in a blast furnace is a critical step in blast furnace production and an essential phase during medium and major overhauls. During shutdowns for charge level lowering, the charge level inside the furnace must be constantly monitored. Traditionally, this method relies on chemical analysis, which roughly estimates the charge level based on changes in the composition of the top gas. This method offers limited accuracy. With technological advancements, some blast furnaces are equipped with radar probes. During the initial stages of charge level lowering, radar probes can provide real-time readings of the charge level. However, as the charge level drops, the effects of high temperatures, dust, and airflow within the furnace become increasingly severe. These interferences can disrupt the radar probe, making it unable to accurately read the charge level, resulting in frequent fluctuations. Furthermore, mechanical probes can be easily melted by the high temperatures within the furnace, rendering them ineffective in measuring the charge level. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a blast furnace charge level detection device, a blast furnace, and a charge level detection control method thereof, which reduce the probability of probe failure due to high temperature, improve the stability of the device, and enhance detection efficiency and accuracy.

[0004] In a first aspect, the present application provides a blast furnace charge level detection device, comprising:

[0005] The housing has a mounting cavity and a guide cavity that are interconnected, wherein the guide cavity is provided at the lower side of the mounting cavity and extends in the height direction;

[0006] The drum is rotatably installed in the installation cavity, and the wire rope is wound on the drum;

[0007] The probe is movably arranged in the guide cavity, and includes a counterweight and a connecting rope connected to the counterweight, the connecting rope is braided with the steel wire rope, and the lower end of the housing is provided with an opening for the counterweight to extend out;

[0008] A driving motor is connected to the drum through a power coupling to drive the drum to rotate;

[0009] A rotation detector is connected to the output end of the driving motor to detect the number of rotations and the rotation speed of the output end of the driving motor;

[0010] A cooling assembly is installed on the housing. The cooling assembly has multiple cooling modes and is used to cool the probe.

[0011] A temperature detector is installed on the housing and corresponds to the guide cavity, and is used to detect the temperature of the probe;

[0012] The controller is electrically connected to the drive motor, the rotation detector, the cooling assembly and the temperature detector. The controller is configured to control the lifting and lowering of the counterweight by controlling the output torque of the drive motor. The controller is configured to determine whether the counterweight is in contact with the material surface based on the current of the drive motor. The controller is configured to obtain the material surface height based on the number of rotations. The controller is configured to control the cooling assembly to cool the probe according to different cooling modes based on the temperature of the counterweight and the material surface height.

[0013] According to the blast furnace charge level detection device of the present application, the braided connection structure of the connecting rope and the steel wire rope enhances the reliability of the probe connection and avoids detection failure due to breakage of the connection part during the detection process. The rotation detector cooperates with the controller to achieve accurate measurement of the charge level height and improve the detection efficiency and accuracy. The coordinated work of the temperature detector and the cooling component can intelligently adjust the cooling strategy according to the actual temperature of the probe and the depth of the charge level, effectively reducing the risk of the probe being damaged by high temperature, greatly improving the stability and service life of the device, and ensuring the efficient and reliable operation of the blast furnace charge level detection work. When detecting the temperature of the probe, the controller can control the cooling component to execute different cooling strategies when the probe is at different heights or at different temperatures on the probe surface, thereby reducing the probability of the probe failing due to high temperature, improving the stability of the device, and improving the detection efficiency and accuracy.

[0014] According to one embodiment of the present application, the cooling assembly includes a nitrogen pipeline, an industrial water pipeline, a water injection pipeline, and an overflow pipeline connected to the guide cavity. The nitrogen pipeline is provided with a nitrogen shut-off valve, the industrial water pipeline is provided with an industrial water shut-off valve, the water injection pipeline is provided with a water injection shut-off valve, and the overflow pipeline is provided with an overflow shut-off valve. The overflow pipeline is provided on the upper side of the water injection pipeline. The housing is also provided with a shut-off valve, which is provided on the lower side of the water injection pipeline to control the on-off of the guide cavity.

[0015] The controller is electrically connected to the nitrogen shut-off valve, industrial water shut-off valve, water injection shut-off valve, overflow shut-off valve and shut-off valve. The controller is configured to control the opening and closing of the nitrogen shut-off valve, industrial water shut-off valve, water injection shut-off valve, overflow shut-off valve and shut-off valve according to the temperature of the counterweight and the material level.

[0016] According to one embodiment of the present application, a nozzle is provided on the shell, the nitrogen pipeline is connected to the nozzle, the industrial water pipeline is connected to the nitrogen pipeline, and the connection position of the industrial water pipeline and the nitrogen pipeline is located on the side of the nitrogen shut-off valve close to the shell.

[0017] According to one embodiment of the present application, it further includes:

[0018] The first reducer and the driving motor are installed on one side of the shell, the input end of the first reducer is dynamically coupled with the output shaft of the driving motor, the output end of the first reducer is connected to the reel through a rotating shaft passing through the shell, and the rotation detector is arranged at the output end of the first reducer.

[0019] According to one embodiment of the present application, the blast furnace material level detection device also includes a second reducer and a master controller, the output end of the first reducer includes a first shaft end and a second shaft end distributed on both sides of the reducer, the first shaft end is dynamically coupled with the rotating shaft, the input end of the second reducer is connected to the second shaft end through a floating coupling, the rotation detector is installed at the output end of the second reducer, the master controller is coupled with the output end of the second reducer, and the controller is electrically connected to the master controller.

[0020] According to one embodiment of the present application, the shell is provided with an inspection port communicating with the guide cavity, and the temperature detector is provided on the upper side of the inspection port.

[0021] In a second aspect, the present application provides a blast furnace, comprising:

[0022] A furnace body having a furnace cavity for accommodating furnace charge;

[0023] As in the blast furnace charge level detection device of any technical solution of the first aspect, the shell is installed on the top of the furnace body, and the lower end of the shell passes through the furnace body so that the opening extends into the furnace cavity;

[0024] There are multiple blast furnace material level detection devices, and the multiple blast furnace material level detection devices are evenly distributed along the circumference of the furnace body.

[0025] According to the blast furnace of this application, multiple detection devices distributed circumferentially can monitor the flatness and symmetry of the charge surface in real time, avoiding single-point misjudgment due to charge segregation, and are especially suitable for complex charge distribution scenarios in large blast furnaces. When a device fails due to high temperature, dust, etc., other devices can still work normally to ensure the continuous operation of the blast furnace. The system can automatically switch to redundant devices through software to avoid shutdowns due to single-point failures. Multi-dimensional charge surface data provides a basis for optimizing the blast furnace charge distribution system, such as adjusting the chute angle, batch weight, etc., which helps to improve the airflow distribution in the furnace, reduce fuel consumption, and improve smelting efficiency.

[0026] In a second aspect, the present application provides a blast furnace charge level detection and control method according to the second aspect, the control method comprising:

[0027] Controlling the driving motor to output a first lifting torque, wherein the first lifting torque is smaller than the gravity torque of the matching member, so as to lower the counterweight member;

[0028] Obtaining the real-time current of the drive motor and the rotation speed of the output end of the drive motor;

[0029] When the real-time current increases or the rotation speed decreases, it is determined that the counterweight is in contact with the material surface;

[0030] Obtain the number of rotations of the output end of the drive motor and calculate the height of the material surface based on the number of rotations;

[0031] controlling the driving motor to output a second lifting torque, wherein the second lifting torque is greater than the gravity torque of the counterweight, so as to lift the counterweight;

[0032] Obtaining the reverse rotation number of the output end of the drive motor, and controlling the drive motor to stop working when the reverse rotation number is the same as the rotation number;

[0033] Get the temperature of the probe;

[0034] The cooling component is controlled to cool the probe according to the temperature and material level.

[0035] According to the material surface detection control method of the present application, the rotating detector cooperates with the controller to achieve accurate measurement of the material surface height, thereby improving detection efficiency and accuracy. The temperature detector and the cooling component work together to intelligently adjust the cooling strategy according to the actual temperature of the probe and the depth of the material surface, effectively reducing the risk of the probe being damaged by high temperature, greatly improving the stability and service life of the device, and ensuring the efficient and reliable operation of the blast furnace material surface detection work. The controller can control the cooling component to execute different cooling strategies when the probe is at different heights or at different temperatures on the probe surface, thereby reducing the probability of the probe failing due to high temperature, improving the stability of the device, and improving detection efficiency and accuracy.

[0036] According to one embodiment of the present application, the cooling assembly includes a nitrogen pipeline, an industrial water pipeline, a water injection pipeline, and an overflow pipeline connected to the guide cavity. The nitrogen pipeline is provided with a nitrogen shut-off valve, the industrial water pipeline is provided with an industrial water shut-off valve, the water injection pipeline is provided with a water injection shut-off valve, and the overflow pipeline is provided with an overflow shut-off valve. The overflow pipeline is provided on the upper side of the water injection pipeline. The housing is also provided with a shut-off valve, which is provided on the lower side of the water injection pipeline to control the on-off of the guide cavity.

[0037] The control cooling component cools the probe according to the temperature and material level, including:

[0038] When the material level is at or above the upper portion of the blast furnace body, the nitrogen gate valve is controlled to open to a first opening, wherein the first opening is 30% to 50%;

[0039] When the charge level is above the upper portion of the blast furnace body and the temperature is greater than a first temperature, the nitrogen shut-off valve and the industrial water shut-off valve are controlled to open to a first opening, wherein the first temperature is 250° C. to 300° C.;

[0040] When the material level is between the upper and lower parts of the blast furnace body, the nitrogen shut-off valve and the industrial water shut-off valve are controlled to open to a first opening;

[0041] When the charge level is between the upper and lower parts of the blast furnace body and the temperature is greater than the second temperature, the nitrogen shut-off valve and the industrial water shut-off valve are controlled to open to a second opening, wherein the second temperature is 350° C. to 400° C. and the first opening is 60% to 80%;

[0042] When the material level is at or below the lower part of the blast furnace body, control the nitrogen shut-off valve and the industrial water shut-off valve to open to the maximum opening;

[0043] When the material level is at the lower part of the blast furnace body and the temperature is greater than the third temperature, the nitrogen gate valve, industrial water gate valve and shut-off valve are controlled to be closed, the water injection gate valve and overflow gate valve are controlled to be opened, and when water is detected flowing out of the water injection gate valve, the water injection gate valve is controlled to be closed, wherein the third temperature is 450℃~500℃.

[0044] According to one embodiment of the present application, the control method further includes:

[0045] When the material level is at or above the upper part of the blast furnace shaft, the material level detection is performed once every first time period, and the first time period is 8 minutes to 12 minutes;

[0046] When the material level is between the upper and lower parts of the blast furnace body, the material level detection is performed every second time period, and the second time period is 18 minutes to 22 minutes;

[0047] When the material level is between the lower part of the blast furnace shaft and the furnace waist, the material level detection is performed every third time period, and the third time period is 36 minutes to 44 minutes;

[0048] When the material level is at or below the furnace waist of the blast furnace, the material level detection is performed every fourth time period, and the fourth time period is 50 minutes to 70 minutes.

[0049] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The above and additional aspects and advantages of the present application will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0051] Figure 1 It is a schematic diagram of the partial structure of a blast furnace provided in an embodiment of the present application;

[0052] Figure 2 This is a partial structural diagram of a blast furnace charge level detection device provided in an embodiment of the present application;

[0053] Figure 3 This is a partial structural diagram of a blast furnace charge level detection device provided in an embodiment of the present application;

[0054] Figure 4 This is a partial structural diagram of a blast furnace charge level detection device provided in an embodiment of the present application;

[0055] Figure 5 1 is a flow chart of a method for detecting and controlling a material level in a blast furnace provided in an embodiment of the present application;

[0056] Figure 6 Schematic diagram of the structure of the material level detection and control device for a blast furnace provided in an embodiment of the present application;

[0057] Figure 7 It is a structural diagram of an electronic device provided in an embodiment of the present application.

[0058] Reference numerals:

[0059] 100. Blast furnace;

[0060] 1. Blast furnace charge level detection device; 11. Housing; 111. Installation cavity; 112. Guide cavity; 113. Nozzle; 114. Shutoff valve; 115. Inspection port; 12. Reel; 121. Wire rope; 13. Probe; 14. Drive motor; 141. First reducer; 142. Second reducer; 143. Floating coupling; 144. Brake; 15. Rotation detector; 16. Cooling assembly; 161. Nitrogen pipeline; 1611. Nitrogen shutoff valve; 162. Industrial water pipeline; 1621. Industrial water shutoff valve; 163. Water injection pipeline; 1631. Water injection shutoff valve; 164. Overflow pipeline; 1641. Overflow shutoff valve; 17. Temperature detector; 18. Master controller;

[0061] 2. Furnace body; 21. Material surface; 22. Probe zero position;

[0062] 31. First control module; 32. First acquisition module; 33. Determination module; 34. Calculation module; 35. Second control module; 36. Third control module; 37. Second acquisition module; 38. Fourth control module;

[0063] 700. Electronic device; 701. Processor; 702. Memory. DETAILED DESCRIPTION

[0064] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0065] Reference below Figures 1-4 A blast furnace charge level detection device and a blast furnace according to an embodiment of the present application are described.

[0066] See also Figures 1 to 4 According to some embodiments of the present application, a blast furnace charge level detection device 1 includes: a housing 11, a reel 12, a probe 13, a drive motor 14, a rotation detector 15, a cooling assembly 16, a temperature detector 17 and a controller.

[0067] The housing 11 has a mounting cavity 111 and a guide cavity 112 that are communicated with each other. The guide cavity 112 is provided at the lower side of the mounting cavity 111 and extends in the height direction.

[0068] The housing 11 serves as the primary support structure for the entire detection device. The mounting cavity 111 accommodates components such as the drum 12 and wire rope 121, providing space for their installation. A guide cavity 112 extends vertically and guides the probe 13, ensuring it moves along a fixed path and avoids deviation. It can be constructed from a high-temperature, wear-resistant alloy steel, such as chromium-molybdenum alloy steel, to withstand the harsh environment of the blast furnace 100.

[0069] The drum 12 is rotatably installed in the installation cavity 111 , and a steel wire rope 121 is wound around the drum 12 .

[0070] The drum 12 is rotatably mounted within the mounting cavity 111 and connected to the housing 11 via bearings, ensuring smooth rotation. A wire rope 121 is wound around the drum 12. Rotation of the drum 12 retracts and extends the wire rope 121, thereby raising and lowering the probe 13. The surface of the drum 12 can be provided with anti-slip grooves to prevent the wire rope 121 from slipping.

[0071] The probe 13 is movably arranged in the guide cavity 112. The probe 13 includes a counterweight and a connecting rope connected to the counterweight. The connecting rope is braided and connected to the wire rope 121. The lower end of the housing 11 is provided with an opening for the counterweight to extend out.

[0072] The probe 13 consists of a counterweight and a connecting rope. The counterweight is used to contact the material surface 21. To ensure that it can accurately detect the material surface 21, it can be made of a high-density, high-temperature-resistant material, such as tungsten alloy. The connecting rope is braided with the wire rope 121. This connection method can stably transmit the tension of the drum 12 to the counterweight. At the same time, compared with conventional bolting and welding methods, the braided connection has a more uniform stress distribution when subjected to tension, which can effectively avoid breakage caused by single-point stress and greatly improve the strength and stability of the connection. The connecting rope can be made of a high-strength alloy wire rope, such as stainless steel wire rope 121.

[0073] The driving motor 14 is power-coupled to the reel 12 to drive the reel 12 to rotate.

[0074] The drive motor 14 is power-coupled to the drum 12, illustratively via a gear drive, chain drive, or belt drive. The drive motor 14 can be an electric motor that drives the drum 12 to rotate via its output torque. By varying the magnitude of the motor's torque, the direction and speed of rotation of the drum 12 can be controlled, thereby controlling the raising and lowering of the counterweight. In some examples, the drive motor 14 can be a DC motor, such that the drive motor 14 applies a torque to the drum 12 that rotates in one direction. Specifically, the drive motor 14 applies a torque to the drum 12 that winds the wire rope 121, thereby consistently applying an upward pull to the probe 13. By adjusting the current of the drive motor 14, the output torque can be varied: when the torque output by the drive motor 14 is less than the weight torque of the counterweight, the counterweight descends; when the torque output by the drive motor 14 is equal to the weight torque of the counterweight, the counterweight remains stationary; and when the torque output by the drive motor 14 is greater than the weight torque of the counterweight, the counterweight ascends. This control method is simple and reliable, and facilitates precise control.

[0075] The rotation detector 15 is connected to the output terminal of the driving motor 14 to detect the number of rotations and the rotation speed of the output terminal of the driving motor 14 .

[0076] The rotation detector 15 can be a photoelectric encoder or a magnetoelectric encoder. In some examples, the rotation detector 15 can be directly mounted on the output shaft of the drive motor 14 to accurately detect the number of rotations and speed at the motor output in real time and transmit the data to the controller, providing key parameters for calculating the material level.

[0077] The cooling assembly 16 is installed on the housing 11 . The cooling assembly 16 has multiple cooling modes and is used to cool the probe 13 .

[0078] The cooling assembly 16 may include multiple cooling modules installed on the shell 11, and the cooling modules are combined to form multiple cooling modes, for example, they may include air cooling, water cooling and other technical means. For example, the air cooling mode of air cooling can be started alone, or the water cooling mode of water cooling can be started alone, or the composite cooling mode of air cooling and water cooling can be started at the same time.

[0079] The temperature detector 17 is mounted on the housing 11 and corresponds to the guide cavity 112 , and is used to detect the temperature of the probe 13 .

[0080] The temperature detector 17 can be a high-temperature resistant K-type thermocouple temperature sensor, or an infrared temperature detector 17, etc., which can be installed in the housing 11 near the guide cavity 112, and can monitor the surface temperature of the probe 13 in real time, and convert the temperature signal into an electrical signal and transmit it to the controller.

[0081] The controller is electrically connected to the drive motor 14, the rotation detector 15, the cooling assembly 16 and the temperature detector 17. The controller is configured to control the lifting and lowering of the counterweight by controlling the output torque of the drive motor 14. The controller is configured to determine whether the counterweight is in contact with the material surface 21 based on the current of the drive motor 14. The controller is configured to obtain the material surface height based on the number of rotations. The controller is configured to control the cooling assembly 16 to cool the probe 13 according to different cooling modes based on the temperature of the counterweight and the material surface height.

[0082] The controller, serving as the core control unit, receives signals from the rotation detector 15, the temperature detector 17, and the current feedback signal from the drive motor 14. By controlling the current of the drive motor 14 and adjusting the output torque, it achieves precise control over the lifting and lowering of the counterweight. Sudden changes in the drive motor 14 current determine whether the counterweight is in contact with the material surface 21. The material surface height is calculated based on the number of revolutions of the rotation detector 15 and the parameters of the winding drum 12. Based on the temperature of the probe 13 and the material surface height, the cooling assembly 16 is controlled to start, stop, or adjust the cooling intensity.

[0083] In actual implementation, at the beginning of detection, the controller first controls the drive motor 14 to output a small torque, which is less than the weight torque of the counterweight. Under the action of gravity, the counterweight descends along the guide cavity 112, driving the wire rope 121 to be released from the drum 12. The rotation detector 15 monitors the rotation of the output end of the drive motor 14 in real time, and transmits the number of rotations and speed information to the controller. The controller calculates the distance the counterweight has descended based on preset parameters such as the diameter of the drum 12 and the diameter of the wire rope 121. When the counterweight contacts the material surface 21, the material surface 21 applies an upward lifting force to the counterweight, the load on the drive motor 14 decreases, and the output end speed slows down, resulting in a significant change in current. After detecting the sudden change in current, the controller determines that the counterweight has contacted the material surface 21 and calculates the material surface height based on the number of rotations recorded by the rotation detector 15. After the probe is complete, the controller increases the output torque of the drive motor 14 to a value greater than the gravitational torque of the counterweight. The drive motor 14 then drives the reel 12 to wind the wire rope 121, retracting the probe 13. During the retraction process, the temperature detector 17 monitors the probe 13's temperature in real time. Based on information such as the temperature and the material level, the controller controls the cooling assembly 16 to cool the probe 13. Specifically, the cooling mode of the cooling assembly 16 is enhanced as the temperature and material level increase, ensuring that the probe 13 maintains a stable operating state even in high-temperature environments.

[0084] According to the blast furnace material level detection device 1 provided in the embodiment of the present application, the braided connection structure of the connecting rope and the steel wire rope 121 enhances the reliability of the connection of the probe 13, avoiding detection failure due to breakage of the connection part during the detection process. The rotation detector 15 cooperates with the controller to achieve accurate measurement of the material level height, improving the detection efficiency and accuracy. The coordinated work of the temperature detector 17 and the cooling component 16 can intelligently adjust the cooling strategy according to the actual temperature of the probe 13 and the depth of the material level 21, effectively reducing the risk of damage to the probe 13 due to high temperature, greatly improving the use stability and service life of the device, and ensuring the efficient and reliable operation of the blast furnace material level detection work. When detecting the temperature of the probe 13, the controller can control the cooling component 16 to execute different cooling strategies when the probe 13 is at different heights or at different temperatures on the surface of the probe 13, thereby reducing the probability of the probe 13 failing due to high temperature, improving the use stability of the device, and improving the detection efficiency and accuracy.

[0085] See also Figure 1 and Figure 2 According to some embodiments of the present application, the cooling assembly 16 may include a nitrogen pipeline 161, an industrial water pipeline 162, a water injection pipeline 163, and an overflow pipeline 164 connected to the guide cavity 112. The nitrogen pipeline 161 is provided with a nitrogen shut-off valve 1611, the industrial water pipeline 162 is provided with an industrial water shut-off valve 1621, the water injection pipeline 163 is provided with a water injection shut-off valve 1631, and the overflow pipeline 164 is provided with an overflow shut-off valve 1641. The overflow pipeline 164 is provided on the upper side of the water injection pipeline 163. The shell 11 A shut-off valve 114 is also provided on it, which is arranged on the lower side of the water injection pipeline 163 and is used to control the on and off of the guide cavity 112; the controller is electrically connected to the nitrogen shut-off valve 1611, the industrial water shut-off valve 1621, the water injection shut-off valve 1631, the overflow shut-off valve 1641 and the shut-off valve 114, and the controller is configured to control the opening and closing of the nitrogen shut-off valve 1611, the industrial water shut-off valve 1621, the water injection shut-off valve 1631, the overflow shut-off valve 1641 and the shut-off valve 114 according to the temperature of the counterweight and the material level.

[0086] Nitrogen pipeline 161 is connected to guide cavity 112 and is used to inject nitrogen into guide cavity 112. Nitrogen is chemically stable and non-flammable and non-explosive. It can form an inert gas protective layer on the surface of the probe 13, reducing the contact between the probe 13 and the oxygen in the furnace at high temperatures and reducing the rate of oxidative corrosion. In addition, the high-speed flow of nitrogen will form forced convection with the surface of the probe 13, accelerating heat exchange on the surface of the probe 13, thereby removing some heat and achieving the purpose of cooling. Low-temperature nitrogen can also have a direct cooling effect. The nitrogen shut-off valve 1611 can be a high-temperature resistant solenoid valve, which can accurately control the amount and injection time of nitrogen.

[0087] The industrial water pipe 162 is used to inject industrial water into the guide cavity 112, and the temperature of the probe 13 is reduced by the principle of heat absorption by evaporation of water. The industrial water cut-off valve 1621 also adopts a high-temperature resistant electromagnetic valve to adjust the flow of industrial water as needed.

[0088] The inlet pipe 163, located below the guide chamber 112, is used to inject cooling water into the chamber. The overflow pipe 164, located above the inlet pipe 163, is used to drain excess cooling water from the chamber to maintain a stable water level. Both the inlet valve 1631 and the overflow valve 1641 are solenoid valves, opened and closed by a controller based on water level and temperature signals.

[0089] A shutoff valve 114 is installed below the water injection line 163 to control the flow of air between the pilot cavity 112 and the interior of the blast furnace 100. During normal detection, the shutoff valve 114 is open, allowing the probe 13 to enter the blast furnace 100. During cooling or equipment maintenance, the shutoff valve 114 can be closed to prevent high-temperature gases and dust from the blast furnace 100 from entering the pilot cavity 112, thereby protecting the cooling system and other equipment components.

[0090] Each pipeline can be connected to the housing 11 by welding or flange connection to ensure a reliable seal. The nitrogen shut-off valve 1611, industrial water shut-off valve 1621, water injection shut-off valve 1631, overflow shut-off valve 1641 and shut-off valve 114 can be electrically connected to the controller via cables or wireless communication to receive switching signals from the controller.

[0091] It can be understood that as the material surface height decreases, the temperature becomes higher as it gets closer to the furnace bottom.

[0092] In actual implementation, in the initial state, all gates and shut-off valves 114 are in the closed state; when performing detection, the shut-off valve 114 is first controlled to open, so that the guide cavity 112 is connected to the inside of the blast furnace 100, which facilitates the probe 13 to enter the inside of the blast furnace 100 to detect the material level height; if the material level is high, that is, the material level 21 and the probe zero position 22 (the probe zero position 22 can be the initial position of the probe 13 set inside the blast furnace 100, the material level height can be calculated by calculating the distance between the probe zero position 22 and the material level 21. It can be understood that when the distance between the probe zero point 22 and the top of the blast furnace 100 is small, it means that the temperature is low. After the probe 13 is recovered to the guide cavity 112, the nitrogen gate 1611 can be opened to cool it down by purging with nitrogen. At the same time, the temperature detector 17 can be used to detect the actual temperature of the probe 13. When it is found that the actual temperature of the probe 13 is higher than a certain temperature threshold, the industrial water gate 1621 can be controlled to open to further cool the probe 13. If the material surface height is low, that is, the distance between the material surface 21 and the probe zero point 22 is large, the temperature of the probe 13 can be reduced by purging with nitrogen. When it is larger, it means that the temperature is higher. After the probe 13 is recovered, the shut-off valve 114 can be directly controlled to be closed, and the water injection gate 1631 and the overflow gate 1641 can be controlled to be opened. By injecting water into the guide cavity 112, the probe 13 is directly immersed in water, so that the probe 13 can be cooled quickly. It should be noted that when it is found that the temperature of the probe 13 is higher than a certain threshold, even if the height of the material surface 21 has not dropped to a lower level, the immersion cooling method can be directly started; if the material surface height has dropped to close to the bottom of the furnace, it means that the temperature has reached an extremely high level. level, the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 can be controlled during the descending stage of the probe 13, and the cooling water can assist in cooling the probe 13 below along the wire rope 121, thereby reducing the risk of direct damage to the probe 13 inside the blast furnace 100 and breakage of the connecting rope and the wire rope 121. After the probe 13 is recovered, the nitrogen shut-off valve 1611, the industrial water shut-off valve 1621 and the shut-off valve 114 are controlled to be closed, and the water injection shut-off valve 1631 and the overflow shut-off valve 1641 are controlled to be opened, and the probe 13 is immersed in water to quickly cool down the probe 13.

[0093] According to the cooling assembly 16 provided in the embodiment of the present application, a variety of cooling modes are formed through the cooperation of the nitrogen pipeline 161, the industrial water pipeline 162, the water injection pipeline 163, and the overflow pipeline 164. The controller can flexibly switch the on and off of different pipelines according to the temperature of the probe 13 and the height of the surface to adapt to the cooling needs under different working conditions in the blast furnace 100, thereby greatly improving the reliability of the use of the probe 13.

[0094] See also Figure 2According to some embodiments of the present application, a nozzle 113 may be provided on the shell 11, the nitrogen pipeline 161 is connected to the nozzle 113, the industrial water pipeline 162 is connected to the nitrogen pipeline 161, and the connection position of the industrial water pipeline 162 and the nitrogen pipeline 161 is located on the side of the nitrogen shut-off valve 1611 close to the shell 11.

[0095] The nozzle 113 is provided on the housing 11 and is connected to the guide cavity 112. Its function is to spray the introduced mixed fluid (nitrogen and industrial water) in a specific form. The nozzle 113 can be an atomizing nozzle 113, such as a pressure atomizing nozzle 113, a pneumatic atomizing nozzle 113, etc. The pressure atomizing nozzle 113 squeezes the fluid from the tiny spray hole through high pressure to form droplets; the pneumatic atomizing nozzle 113 uses a high-speed nitrogen gas flow to impact and shear the industrial water, breaking it into tiny droplets. The shape and aperture size of the nozzle 113 will affect the atomization effect and the spray range, and are usually designed according to actual cooling requirements. For example, a nozzle 113 with a smaller aperture can produce finer droplets, thereby enhancing the cooling effect.

[0096] Nitrogen pipeline 161 is connected to an external nitrogen source at one end and to nozzle 113 at the other. Industrial water pipeline 162 is connected to an external industrial water source at one end and to nitrogen pipeline 161 at the nitrogen shutoff valve 1611 near the housing 11 at the other end. Together, these three pipelines form the fluid delivery channel for atomized cooling. All connections between the pipelines and the housing 11 are sealed to prevent fluid leakage.

[0097] The connection point between the industrial water pipeline 162 and the nitrogen pipeline 161 is located on the side of the nitrogen shut-off valve 1611 close to the shell 11. This design allows the industrial water to be fully mixed with the nitrogen under the action of nitrogen pressure after entering the nitrogen pipeline 161. The connection method can be welding, flange connection or quick-plug connector connection. Welding connection has high sealing and strength; flange connection is easy to disassemble and maintain; quick-plug connector connection is easy to operate and can quickly connect and disconnect the pipelines. When the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 are opened at the same time, nitrogen and industrial water are mixed in the nitrogen pipeline 161 and sprayed out from the nozzle 113 under the action of pressure to form an atomization effect. The atomized water droplets have a large specific surface area and can absorb heat more quickly when in contact with the surface of the probe 13. A large amount of heat is taken away by the evaporation of water, thereby achieving efficient cooling of the probe 13.

[0098] This design, which connects nitrogen pipeline 161 and industrial water pipeline 162 and implements atomized cooling through nozzle 113, offers higher cooling efficiency than nitrogen or industrial water cooling alone. The atomized water droplets more evenly cover the surface of the probe 13, evaporate quickly, and are more efficient at removing heat, effectively reducing the temperature of the probe 13 in high-temperature environments and extending its service life. Furthermore, the inert gas barrier formed by the nitrogen reduces oxidation and corrosion of the probe 13, improving the stability of the device.

[0099] See also Figure 2 According to some embodiments of the present application, the housing 11 is provided with an inspection port 115 communicating with the guide cavity 112 , and the temperature detector 17 is provided on the upper side of the inspection port 115 .

[0100] The inspection port 115 is provided on the shell 11 and is connected to the guide cavity 112, and is mainly used for equipment maintenance, inspection and component replacement. The shape of the inspection port 115 can be circular, square or oval, etc., and the size is designed according to the actual inspection needs to facilitate the manual operation of the technician or the entry and exit of the probe 13. The inspection port 115 is usually equipped with a detachable sealing cover plate, which is connected to the shell 11 by bolts and is provided with a high-temperature resistant sealing rubber ring. While ensuring the sealing performance, it prevents the leakage of high-temperature gas and dust in the blast furnace 100 and maintains the stability of the working environment in the guide cavity 112. When it is necessary to inspect the components located in the guide cavity 112, such as the probe 13 and the cooling assembly 16, the sealing cover plate can be opened to facilitate the staff to quickly locate and handle the fault.

[0101] Specifically, the inspection port 115 is provided above the shutoff valve 114 , and the shutoff valve 114 is controlled to be closed before the inspection port 115 is opened, so as to prevent the hot gas in the blast furnace 100 from affecting the workers.

[0102] Temperature detector 17 is mounted above access opening 115. The relatively open space near access opening 115 facilitates installation and commissioning of temperature detector 17 and reduces interference with detection signals from other components. Furthermore, positioning temperature detector 17 above access opening 115 allows for more accurate monitoring of temperature changes within probe 13 within guide cavity 112. Temperature detector 17 can be a non-contact infrared temperature sensor, acquiring temperature data by detecting infrared radiation from the surface of probe 13. This method avoids direct contact with probe 13, preventing it from interfering with its normal operation and enabling stable detection in high-temperature environments.

[0103] In actual implementation, after each detection of the material surface 21, the probe 13 is retracted to the inspection port 115 so that the temperature detector 17 can detect the temperature of the probe 13. Moreover, when the material surface height is low, the status of the probe 13 can be checked by opening the inspection port 115 after each detection. When the probe 13 is damaged, it can be maintained or replaced in time to ensure the stability of the device and the timely and accurate detection of the material surface 21.

[0104] In some embodiments, when the temperature detector 17 is an infrared temperature sensor, the infrared temperature sensor can also be used to detect whether the probe 13 has fallen off. When the probe 13 is recovered, the controller detects that the reel 12 has rotated to the recovery state, but the infrared temperature sensor does not detect the probe 13. It can be determined that the probe 13 has fallen off. At this time, the inspection port 115 can be opened to replace the probe 13 in time.

[0105] According to the blast furnace charge level detection device 1 provided in the embodiment of the present application, the setting of the inspection port 115 facilitates the maintenance and inspection of the blast furnace charge level detection device 1, reduces the time and difficulty of equipment maintenance, and improves the maintainability of the equipment. The temperature detector 17 is installed on the upper side of the inspection port 115, which not only ensures the accuracy and comprehensiveness of the detection data, but also facilitates installation and subsequent maintenance, avoiding the impact of frequent disassembly on the detection accuracy. The combined design of the two allows the device to reduce the equipment maintenance cost while ensuring the effective monitoring of the temperature of the probe 13, improves the stability and reliability of the overall operation, and extends the service life of the equipment.

[0106] See also Figure 3 and Figure 4 The blast furnace material level detection device 1 can also include a first reducer 141. The drive motor 14 can be installed on one side of the shell 11. The input end of the first reducer 141 is dynamically coupled with the output shaft of the drive motor 14. The output end of the first reducer 141 is connected to the reel 12 through a rotating shaft passing through the shell 11. The rotation detector 15 is arranged at the output end of the first reducer 141.

[0107] The first reducer 141 is a key component of power transmission, used to reduce the output speed of the drive motor 14 and increase the torque. Its input end is connected to the output shaft of the drive motor 14 through a coupling to achieve smooth power transmission; the output end is connected to the drum 12 through a rotating shaft, transmitting the reduced power to the drum 12 to drive its rotation. The first reducer 141 can adopt a multi-stage gear transmission structure, such as a cylindrical gear reducer, which has the advantages of high transmission efficiency, compact structure, and strong load-bearing capacity. The transmission ratio is designed to match the rated speed of the drive motor 14 and the required operating speed of the drum 12 to ensure that the drum 12 can wind or release the wire rope 121 at an appropriate speed.

[0108] The rotation detector 15 is provided at the output end of the first reducer 141 to directly detect the number of revolutions and the rotation speed of the reducer output shaft. This arrangement can more accurately reflect the actual rotation of the reel 12.

[0109] The first reducer 141 enables the drive motor 14 to operate at a higher speed, improving its efficiency and service life. This reduction in speed and torque increase provides sufficient torque for the reel 12, ensuring stable raising and lowering of the probe 13. The drive motor 14 is mounted on one side of the housing 11, optimizing the overall structure of the device and reducing the effects of heat and vibration on other components. The rotation detector 15, located at the output end of the reducer, improves the accuracy of detection data and provides reliable assurance for precise measurement of material surface height.

[0110] In some embodiments, the output shaft of the drive motor 14 may be connected to a brake 144. The brake 144 may include an electromagnetic coil, a brake disc, and a brake arm. The brake disc is fixedly connected to the output shaft of the drive motor 14. When the electromagnetic coil is energized, the brake disc is released. When the electromagnetic coil is de-energized, the spring force drives the brake arm to clamp the brake disc. A controller is electrically connected to the brake 144. The controller may be configured to control the brake 144 to energize and release when the drive motor 14 is operating normally; to control the brake 144 to de-energize and apply a brake when the drive motor 14 stops or loses power; and to trigger the brake 144 to slowly decelerate when the counterweight reaches a preset position and needs to be decelerated, thereby controlling the drive motor 14 to stop.

[0111] See also Figure 3 and Figure 4 According to some embodiments of the present application, the blast furnace material level detection device 1 may further include a second reducer 142 and a master controller 18. The output end of the first reducer 141 includes a first shaft end and a second shaft end distributed on both sides of the reducer. The first shaft end is dynamically coupled with the rotating shaft. The input end of the second reducer 142 is connected to the second shaft end through a floating coupling 143. The rotation detector 15 is installed at the output end of the second reducer 142. The master controller 18 is coupled to the output end of the second reducer 142, and the controller is electrically connected to the master controller 18.

[0112] The output of the first reducer 141 has a first shaft end and a second shaft end located on either side. This structure enables the reducer to output power in two different directions simultaneously. The first shaft end is connected to the reel 12 via a rotating shaft, directly driving the reel 12's rotation. The second shaft end is connected to the input of the second reducer 142 via a floating coupling 143, transmitting power to subsequent detection and control mechanisms.

[0113] The floating coupling 143 is used to connect the second shaft end of the first reducer 141 and the input end of the second reducer 142. The floating coupling 143 has a certain degree of flexibility and compensation capability, and can allow a certain amount of axial, radial and angular deviation between the two shafts, effectively compensating for shaft misalignment problems that may occur during installation and operation. This is particularly important for the blast furnace material level detection device 1 operating in a high temperature and vibration environment, which can reduce the additional load and wear caused by shaft misalignment, and improve transmission efficiency and equipment service life. The floating coupling 143 can adopt types such as gear couplings and diaphragm couplings, and the appropriate model and specifications can be selected according to the actual working conditions.

[0114] Rotation detector 15, mounted at the output of second reducer 142, more accurately captures the actual rotational parameters after the two-stage reduction. Because second reducer 142 has a lower output speed and greater torque, the signal detected by rotation detector 15 at this location is more stable and accurate, reducing measurement errors caused by high-speed rotation. This provides the controller with more reliable rotational data, thereby improving the accuracy of material level calculations.

[0115] The master controller 18 is coupled to the output of the second reducer 142, receives the rotation signal output by the second reducer 142, converts it into an electrical signal, and transmits it to the controller. The master controller 18 can be a cam controller, photoelectric encoder, or other type. Based on pre-set programs and parameters, it assists the rotation detector 15 in precisely controlling the operating state of the drive motor 14, thereby improving overall safety and stability.

[0116] According to the blast furnace charge level detection device 1 provided in the embodiment of the present application, the combined design of the dual reducer and the master controller 18 realizes the organic combination of power transmission, detection and control, and improves the overall performance and reliability of the device. The use of the floating coupling 143 compensates for the shaft misalignment problem, reduces equipment failures and maintenance costs. The rotation detector 15 is installed at the output end of the second reducer 142, which improves the measurement accuracy and provides a more accurate control basis for the master controller 18. The coupling connection between the master controller 18 and the output end of the second reducer 142 realizes the precise control of the drive motor 14, making the lifting process of the probe 13 more stable and precise, further improving the accuracy and efficiency of blast furnace charge level detection.

[0117] In some embodiments, the counterweight and the connecting rope may be wrapped with heat-resistant felt.

[0118] Heat-resistant felt can be made of high-temperature resistant materials such as ceramic fiber felt, rock wool, or glass fiber felt. Its temperature resistance range is generally 600°C to 1400°C, effectively blocking high-temperature radiation and convection heat within the blast furnace 100. For example, ceramic fiber felt has the characteristics of light weight, low thermal conductivity (0.03-0.05 W / (m·K)), and good thermal shock resistance. It can maintain structural stability in high-temperature environments and prevent material aging or embrittlement caused by high temperatures.

[0119] The insulation layer reduces the direct erosion of high temperature on the counterweight and the connecting rope, prevents the counterweight from softening due to high temperature or the connecting rope from breaking due to thermal degradation, and can extend the service life of the probe 13 by 30% to 50%. The heat-resistant felt reduces the overall heat absorption of the probe 13, allowing the cooling component 16 to more efficiently control the temperature of the probe 13 within a safe range and reduce the consumption of cooling medium. Under extreme working conditions such as a large depth of the blast furnace charge surface or a cooling system failure, the heat-resistant felt can serve as an independent protective layer to provide emergency protection for the probe 13 and prevent the equipment from failing due to sudden high temperature. The heat-resistant felt can be designed in a modular manner and can be replaced individually when locally worn, without the need to disassemble the probe 13 as a whole, reducing maintenance costs and downtime.

[0120] See also Figure 1 The embodiment of the present application further provides a blast furnace 100, which includes a furnace body 2 and a blast furnace charge level detection device 1 as described in any of the above technical solutions.

[0121] It should be noted that, since the blast furnace 100 provided in the embodiment of the present application includes a blast furnace charge level detection device 1 as in any of the above-mentioned technical solutions, it has the technical features and technical effects of the blast furnace charge level detection device 1 as in any of the above-mentioned technical solutions, which will not be repeated here.

[0122] The furnace body 2 has a furnace chamber for accommodating a charge.

[0123] The furnace body 2 is the main container of the blast furnace 100. Its internal cavity is used to store charge and conduct metallurgical reactions. A mounting interface is provided at the top of the furnace body 2 for securing the housing 11 of the blast furnace charge level detection device 1. This mounting interface utilizes flange connections or welding to ensure a tight seal and prevent leakage of high-temperature gases within the furnace. The furnace body 2 is typically constructed of high-temperature-resistant low-alloy, high-strength steel (such as Q345R), with refractory bricks or amorphous refractory materials lining the interior to withstand high temperatures and charge erosion.

[0124] The shell 11 of the blast furnace charge level detection device 1 is installed on the top of the furnace body 2, and the lower end of the shell 11 passes through the furnace body 2 so that the opening extends into the furnace cavity.

[0125] Shell 11 extends vertically through furnace body 2 through a mounting hole at the top, with its open end extending into the furnace cavity, ensuring that the counterweight of probe 13 can directly contact charge surface 21. To accommodate thermal expansion and contraction of furnace body 2, an expansion joint or flexible sealing structure (such as graphite packing) can be provided at the connection between shell 11 and furnace body 2 to prevent equipment damage or leakage due to temperature deformation.

[0126] There are multiple blast furnace charge level detection devices 1 , and the multiple blast furnace charge level detection devices 1 are evenly distributed along the circumference of the furnace body 2 .

[0127] The number of blast furnace charge level detection devices 1 can be 2 to 4, for example, 2, 3, or 4, with no specific limitation. Multiple blast furnace charge level detection devices 1 are evenly distributed along the circumference of the furnace body 2, for example, at intervals of 90°, 120°, or 180°. This layout can cover different areas of the furnace cavity cross section, avoiding the limitations of single-point measurement.

[0128] Multiple blast furnace charge level detection devices 1 can realize synchronous or time-sharing detection through a controller:

[0129] During synchronous detection, all devices lower the probe 13 at the same time to obtain multi-dimensional data of the furnace charge surface 21, and calculate the average charge surface height through a data fusion algorithm (such as weighted average) to improve measurement reliability.

[0130] During time-sharing detection, it can work in a preset order to reduce system energy consumption and is suitable for long-term continuous monitoring scenarios.

[0131] In actual operation, the controller controls the drive motor 14 of a single blast furnace charge level detection device 1 to lower the probe 13. The counterweight enters the furnace cavity through the lower opening of the housing 11. When it contacts the charge level 21, the current in the drive motor 14 suddenly increases. The controller records the number of revolutions of the rotation detector 15 and calculates the charge level. After detection is complete, the probe 13 is retracted, and the cooling assembly 16 activates the corresponding cooling mode based on the temperature data.

[0132] In synchronous mode, all blast furnace charge level detection devices 1 simultaneously complete the "lowering → detection → recovery → cooling" cycle. The controller aggregates data from each device to determine whether the charge level 21 is level. If the charge level in a particular area deviates from the average by more than a threshold (e.g., ±10 cm), an alarm is triggered, prompting the operator to adjust the charge distribution strategy.

[0133] In the time-sharing mode, each blast furnace charge level detection device 1 works in turn at a preset time interval (eg, every 10 minutes), ensuring that at least one device in the furnace cavity is always on standby, thereby improving system reliability.

[0134] According to the blast furnace 100 provided in the embodiment of the present application, the circumferential distribution of multiple detection devices can monitor the flatness and symmetry of the charge surface 21 in real time, avoid single-point misjudgment caused by charge segregation, and is particularly suitable for complex charging scenarios of large blast furnaces 100. When a device fails due to high temperature, dust, etc., other devices can still work normally to ensure the continuous operation of the blast furnace 100. The system can automatically switch to a redundant device through software to avoid shutdown due to a single point failure. Multi-dimensional charge surface 21 data provides a basis for optimizing the charging system of the blast furnace 100 (such as adjusting the chute angle and the weight of the batch), which helps to improve the airflow distribution in the furnace, reduce fuel consumption, and improve smelting efficiency.

[0135] In some embodiments, the blast furnace charge level detection device 1 may further have a follow-up mode to achieve continuous dynamic monitoring of the blast furnace charge level.

[0136] During the lowering process of the probe 13, the controller precalculates the estimated gravitational torque of the counterweight in the air and controls the output torque of the drive motor 14 to be 0.8 times the estimated gravitational torque. Under this working condition, the counterweight overcomes the motor pull and descends at a uniform speed under the action of its own gravity. During the descent process, the rotation detector 15 monitors the height position of the counterweight in real time, and the controller determines its torque fluctuation by detecting the current change of the drive motor 14 (the current is positively correlated with the output torque). This design not only avoids the impact of the free fall of the counterweight on the structure of the probe 13, but also ensures that the lowering speed is controllable, thereby improving the measurement efficiency.

[0137] When the counterweight contacts the material surface 21, the current in the drive motor 14 experiences a significant sudden change, triggering the system to enter follow mode. At this point, the controller adjusts the drive motor 14's output to a preset torque, which is less than the counterweight's weight torque and dynamically balanced with the combined torque of the counterweight's weight and the lifting force of the material surface 21. This ensures that the counterweight neither sinks into the material layer due to excessive gravity nor escapes from the material surface 21 due to motor pull, allowing the counterweight to slowly descend synchronously with the material surface 21. By precisely controlling the torque, the counterweight maintains a vertical position during descent, avoiding measurement errors caused by tilt and ensuring the accuracy of the detection data.

[0138] During the follow-up mode operation, the controller collects and stores the current material surface height data through the rotating detector 15 in a cycle of 30 to 60 seconds. When the material surface height is detected to reach a preset threshold (such as lower than the feeding line height), the controller immediately sends a feeding instruction to the blast furnace 100 feeding system and starts the probe 13 recovery program at the same time.

[0139] After sending the feeding signal, the controller controls the drive motor 14 to increase the output torque to 1.2 times the maximum safety torque, so that the counterweight can rise rapidly at the upper limit of the safety speed, shortening the single detection cycle; when the probe 13 rises to the upper limit, the controller preferentially triggers the brake 144 device for braking, and realizes gradual deceleration by adjusting the braking torque of the brake 144, avoiding the mechanical shock caused by the emergency stop and protecting the probe 13 and the transmission components.

[0140] Through the above-mentioned following mode design, the device can realize continuous monitoring and dynamic response of the blast furnace material surface. Compared with the traditional single-point measurement method, it significantly improves the real-time and accuracy of material surface height detection, while reducing the wear of mechanical components and extending the service life of the equipment.

[0141] In some embodiments, if the controller detects that the probe 13 exceeds the limit, it can also immediately cut off the power and issue an alarm.

[0142] See also Figure 5 , an embodiment of the present application also provides a material level detection and control method for a blast furnace 100 as any of the above technical solutions.

[0143] Below, in combination with the accompanying drawings, the material level detection and control method of the blast furnace 100, the material level detection and control device of the blast furnace 100, the electronic device and the readable storage medium provided in the embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0144] The material level detection and control method of the blast furnace 100 may be applied to a terminal, and may be specifically executed by hardware or software in the terminal.

[0145] The terminal includes, but is not limited to, a portable communication device such as a mobile phone or tablet computer having a touch-sensitive surface (e.g., a touch screen display and a touch pad). It should also be understood that, in some embodiments, the terminal may not be a portable communication device, but a desktop computer having a touch-sensitive surface (e.g., a touch screen display and / or a touch pad).

[0146] In the following embodiments, a terminal including a display and a touch-sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, a mouse, and a joystick.

[0147] The embodiment of the present application provides a material surface detection and control method for the blast furnace 100. The execution subject of the material surface detection and control method for the blast furnace 100 may be an electronic device or a functional module or functional entity in the electronic device that can implement the material surface detection and control method for the blast furnace 100. The electronic devices mentioned in the embodiment of the present application include but are not limited to mobile phones, tablet computers, computers, cameras, and wearable devices. The material surface detection and control method for the blast furnace 100 provided in the embodiment of the present application is described below using electronic devices as the execution subject as an example.

[0148] It should be noted that in the material level detection and control method of the blast furnace 100 provided in the embodiment of the present application, the blast furnace 100 is a blast furnace 100 as in any of the above-mentioned technical solutions, and therefore has the technical characteristics and technical effects of the blast furnace 100 as in any of the above-mentioned technical solutions, which will not be repeated here.

[0149] The control method includes: step 210 , step 220 , step 230 , step 240 , step 250 , step 260 , step 270 and step 280 .

[0150] Step 210: Control the drive motor 14 to output a first lifting torque, wherein the first lifting torque is smaller than the gravity torque of the matching component, so as to lower the counterweight component.

[0151] In step 210, the controller controls the drive motor 14 to output a first lifting torque that is less than the gravitational torque of the counterweight. This torque allows the counterweight to overcome the motor pull under the action of gravity and steadily descend along the guide cavity 112. This step is the initial operation for detecting the material surface 21. By properly setting the first lifting torque, the counterweight can be lowered smoothly while preventing its free fall from causing any impact on the probe 13 and related components.

[0152] Step 220 : Acquire the real-time current of the drive motor 14 and the rotation speed of the output end of the drive motor 14 .

[0153] In step 220, the real-time current and output speed of the drive motor 14 are acquired in real time as the counterweight descends. The rotation detector 15 continuously monitors the output speed of the drive motor 14, while the motor's real-time current is acquired via a current sensor. This data is crucial for determining whether the counterweight is in contact with the material surface 21, providing crucial information for subsequent steps.

[0154] Step 230 : When the real-time current increases or the rotation speed decreases, it is determined that the counterweight contacts the material surface 21 .

[0155] In step 230, if an increase in real-time current or a decrease in rotational speed is detected, the counterweight is determined to have contacted the material surface 21. This is because when the counterweight contacts the material surface 21, the resistance increases, increasing the load on the drive motor 14, resulting in an increase in current and a decrease in rotational speed. This judgment mechanism can quickly and accurately capture the moment of contact with the material surface 21, laying the foundation for subsequent material surface height calculation.

[0156] Step 240 : Obtain the number of rotations of the output end of the driving motor 14 , and calculate the height of the material surface 21 according to the number of rotations.

[0157] In step 240, after determining that the counterweight has contacted the material surface 21, the number of rotations of the output terminal of the drive motor 14 is obtained. Based on pre-set parameters such as the radius of the drum 12 and the diameter of the wire rope 121, and the number of rotations, the height of the material surface 21 is calculated using a formula. For example, given a radius of r for the drum 12, a diameter of d for the wire rope 121, and a number of rotations of n, the material surface height h = 2πr × n + k (where k is a correction factor), thus enabling accurate measurement of the material surface height.

[0158] Step 250: Control the drive motor 14 to output a second lifting torque, wherein the second lifting torque is greater than the gravity torque of the counterweight, so as to lift the counterweight.

[0159] In step 250, after the material level is measured, the controller controls the drive motor 14 to output a second lifting torque greater than the gravitational torque of the counterweight. Drive motor 14 rotates drum 12, winding wire rope 121 and raising the counterweight. This step ensures that probe 13 can be retracted from the furnace material level 21 to its initial position, preparing for the next measurement.

[0160] Step 260 : Acquire the reverse rotation number of the output end of the drive motor 14 , and control the drive motor 14 to stop working when the reverse rotation number is the same as the rotation number.

[0161] In step 260, during the ascending process of the counterweight, the number of reverse rotations of the output end of the drive motor 14 is obtained. When the number of reverse rotations is the same as the number of rotations recorded during the descent process, it indicates that the counterweight has returned to its initial position. At this time, the drive motor 14 is controlled to stop, and the probe 13 is accurately reset.

[0162] Step 270: Acquire the temperature of the probe 13.

[0163] In step 270, the temperature of the probe 13 is obtained using the temperature detector 17 mounted on the housing 11 and corresponding to the guide cavity 112. The temperature detector 17 monitors the surface temperature of the probe 13 in real time and transmits the temperature data to the controller to provide a basis for formulating the cooling strategy.

[0164] Step 280: Control the cooling assembly 16 to cool the probe 13 according to the temperature and the material level.

[0165] In step 280, the controller controls the cooling assembly 16 to cool the probe 13 based on the detected probe 13 temperature and material level. The cooling assembly 16 has multiple cooling modes, and the controller selects the appropriate cooling mode and intensity based on different temperature and material level combinations. For example, during the descent of the probe 13, if the material level 21 is deep and the probe 13 is expected to be exposed to high temperatures, the controller may activate the cooling assembly 16 for pre-cooling. After the probe 13 is recovered, the cooling assembly 16's operating state is adjusted based on the actual detected temperature until the probe 13 temperature drops to a safe range.

[0166] It should be noted that the above steps are not strictly executed in sequence; there are certain parallel and interactive logic elements. For example, the operation of the cooling assembly 16 in step 280 depends not only on the temperature of the probe 13 obtained in step 270, but also on the material level obtained in step 240, enabling cooling to be preemptively performed during the descent of the probe 13. During the counterweight descent process (steps 210 to 230), the cooling assembly 16 can predict the risk of high temperature based on the depth of the material level 21 and preemptively activate some cooling functions. After the probe 13 is recovered, the cooling intensity is further adjusted based on the actual temperature. Furthermore, the real-time acquisition of the current and speed of the drive motor 14 in step 220 runs throughout the entire descent and ascent of the counterweight, providing continuous data support for contact determination (step 230) and position control (step 260). These steps work together to achieve efficient and accurate blast furnace material level detection and control.

[0167] According to the control method provided in the embodiment of the present application, the rotation detector 15 cooperates with the controller to achieve accurate measurement of the material surface height, thereby improving detection efficiency and accuracy. The temperature detector 17 and the cooling component 16 work together to intelligently adjust the cooling strategy according to the actual temperature of the probe 13 and the depth of the material surface 21, effectively reducing the risk of damage to the probe 13 due to high temperature, greatly improving the stability and service life of the device, and ensuring the efficient and reliable operation of the blast furnace material surface detection work. By detecting the temperature of the probe 13, the controller can control the cooling component 16 to execute different cooling strategies when the probe 13 is at different heights or at different temperatures on the surface of the probe 13, thereby reducing the probability of the probe 13 failing due to high temperature, improving the stability of the device, and improving detection efficiency and accuracy.

[0168] According to some embodiments of the present application, the cooling assembly 16 includes a nitrogen pipeline 161, an industrial water pipeline 162, a water injection pipeline 163 and an overflow pipeline 164 connected to the guide cavity 112. The nitrogen pipeline 161 is provided with a nitrogen shut-off valve 1611, the industrial water pipeline 162 is provided with an industrial water shut-off valve 1621, the water injection pipeline 163 is provided with a water injection shut-off valve 1631, and the overflow pipeline 164 is provided with an overflow shut-off valve 1641. The overflow pipeline 164 is provided on the upper side of the water injection pipeline 163. The shell 11 is also provided with a shut-off valve 114, which is provided on the lower side of the water injection pipeline 163 for controlling the on and off of the guide cavity 112.

[0169] Step 280 , controlling the cooling assembly 16 to cool the probe 13 according to the temperature and the material level, includes: step 281 , step 282 , step 283 , step 284 , step 285 and step 286 .

[0170] Step 281: When the material level is at or above the upper portion of the furnace body of the blast furnace 100, the nitrogen shut-off valve 1611 is controlled to open to a first opening, wherein the first opening is 30% to 50%;

[0171] It can be understood that the furnace body 2 includes the furnace throat, furnace body, furnace waist, furnace belly and furnace hearth from top to bottom, which is common knowledge for those skilled in the art. For the convenience of subsequent explanation, the height position of the zero line of the probe 13 is taken as 0, the material line of the furnace throat is 0~2.2 meters, the material line of the furnace body is 2.2~18.8 meters, the material line of the furnace waist is 18.8~21.2 meters, and the material line of the furnace belly is 21.2~24.6 meters as an example.

[0172] In step 281, when the material surface height is located at or above the upper part of the blast furnace 100 (refer to the above example, that is, when the distance between the material surface 21 and the zero line of the probe 13 is 0 to 4.5 meters), the ambient temperature is relatively low. At this time, only the nitrogen gate valve 1611 is opened to the first opening, and the probe 13 is slightly cooled by nitrogen purge, while forming a protective gas film to prevent the probe 13 from oxidizing.

[0173] Step 282: When the material level is above the upper part of the furnace body of the blast furnace 100 and the temperature is greater than the first temperature, control the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 to open to a first opening, wherein the first temperature is 250°C to 300°C.

[0174] In step 282, when the material surface height is above the upper part of the furnace body and the temperature of the probe 13 exceeds the first temperature (250℃~300℃), the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 are opened to the first opening at the same time, and the probe 13 is subjected to enhanced cooling by utilizing the nitrogen purge and the evaporation heat absorption of the industrial water. The value of the first temperature can be determined based on actual experience.

[0175] Step 283 : When the material level is between the upper and lower parts of the furnace body of the blast furnace 100 , the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 are controlled to open to a first opening.

[0176] In step 283, when the material surface height is between the upper and lower parts of the furnace body (referring to the above example, that is, when the distance between the material surface 21 and the zero line of the probe 13 is 4.5 to 13 meters), the ambient temperature rises, and the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 are kept open to the first opening to continuously cool the probe 13.

[0177] Step 284: When the material level is between the upper and lower parts of the furnace body of the blast furnace 100 and the temperature is greater than the second temperature, control the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 to open to the second opening, wherein the second temperature is 350°C to 400°C and the first opening is 60% to 80%.

[0178] In step 284, if the temperature of the probe 13 exceeds the second temperature (350°C to 400°C) within this range, the openings of the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 are increased to the second opening to further enhance the cooling effect. The value of the second temperature can be determined based on actual experience.

[0179] Step 285: When the material level is at or below the lower portion of the furnace body of the blast furnace 100, the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 are controlled to open to the maximum opening.

[0180] In step 285, when the material surface height is at or below the lower part of the furnace body (referring to the above example, that is, when the distance between the material surface 21 and the zero line of the probe 13 is 13 to 25.1 meters), the temperature inside the blast furnace 100 is relatively high, and the nitrogen gate valve 1611 and the industrial water gate valve 1621 are adjusted to the maximum opening to cool the probe 13 with all efforts.

[0181] Step 286: When the material level is at the lower part of the furnace body of the blast furnace 100 and the temperature is greater than the third temperature, the nitrogen gate valve 1611, the industrial water gate valve 1621 and the shut-off valve 114 are controlled to be closed, the water injection gate valve 1631 and the overflow gate valve 1641 are controlled to be open, and when water is detected flowing out of the water injection gate valve 1631, the water injection gate valve 1631 is controlled to be closed, wherein the third temperature is 450°C to 500°C.

[0182] In step 286, if the material surface 21 is at the lower part of the furnace body and the temperature of the probe 13 exceeds the third temperature (450°C to 500°C), close the nitrogen shut-off valve 1611, the industrial water shut-off valve 1621 and the shut-off valve 114, open the water injection shut-off valve 1631 and the overflow shut-off valve 1641, and inject water into the guide cavity 112 to form a water jacket cooling. When water is detected to be flowing out of the water injection shut-off valve 1631, close the water injection shut-off valve 1631 to ensure that the water level in the guide cavity 112 is stable, and quickly reduce the temperature of the probe 13 through the efficient heat dissipation capacity of water. The third temperature can be determined based on actual experience.

[0183] During the detection of the material level 21 during the blast furnace 100's charge reduction process, the controller acquires real-time data on the material level and the temperature of the probe 13. Based on the preset control logic, it precisely controls the opening and closing of each gate of the cooling assembly 16 and the degree of opening. Based on the different positions of the material level 21 within the blast furnace 100 and the actual temperature of the probe 13, the controller flexibly switches cooling modes and adjusts cooling intensity, achieving a balance between cooling efficiency and energy consumption while ensuring the normal operation of the probe 13. For example, when the material level 21 is low and the temperature is high, the strongest cooling mode is automatically activated to prevent damage to the probe 13 due to high temperature. When the material level 21 is high and the temperature is low, low-intensity cooling is used to conserve resources.

[0184] This hierarchical cooling control method, based on charge level and probe 13 temperature, intelligently adjusts the operating state of cooling assembly 16 according to varying operating conditions within blast furnace 100. Compared to a single cooling mode, it significantly improves cooling efficiency and targetedness. This effectively reduces the risk of high-temperature damage to probe 13, extending its service life. It also rationally controls the use of cooling media, reducing operating costs. Furthermore, by combining and switching between multiple cooling methods, the device enhances its adaptability and stability in complex, high-temperature environments, ensuring reliable blast furnace charge level detection.

[0185] In some examples, when the material surface height is at the furnace waist or below (refer to the above example, that is, when the distance between the material surface 21 and the zero line of the probe 13 is 18.8 to 24 meters), during the descent of the probe 13, it is necessary to control the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 to open to the maximum opening, and control the nitrogen shut-off valve 1611 and the industrial water shut-off valve 1621 to close after the probe 13 is recovered.

[0186] Moreover, at this stage, if the temperature of the probe 13 exceeds 800°C, after soaking and cooling, it is necessary to manually open the inspection port 115 to check the status of the probe 13 and the heat-resistant felt to see if there is a risk of serious burning or falling off. If necessary, manual replacement should be carried out in a timely manner.

[0187] According to some embodiments of the present application, the control method further includes:

[0188] When the material level is located at or above the upper portion of the furnace body of the blast furnace 100 , the material level 21 detection is performed once every first time period, and the first time period is 8 minutes to 12 minutes;

[0189] When the material level is between the upper and lower parts of the furnace body of the blast furnace 100, the material level 21 detection is performed every second time period, and the second time period is 18 minutes to 22 minutes;

[0190] When the material level is between the lower portion of the shaft of the blast furnace 100 and the waist of the blast furnace 100 , the material level 21 detection is performed every third time period, and the third time period is 36 minutes to 44 minutes;

[0191] When the material level is located at or below the furnace waist of the blast furnace 100 , the material level 21 detection is performed every fourth time period, and the fourth time period is 50 minutes to 70 minutes.

[0192] This control method sets a decreasing detection frequency according to the different height areas of the material surface 21 in the blast furnace 100, namely the upper, middle, lower, furnace waist and below: the temperature in the upper part of the furnace body is lower and the material surface 21 changes faster, and the detection cycle is the shortest (8-12 minutes), ensuring timely capture of material distribution changes; in the middle part of the furnace body, the detection cycle is moderate (18-22 minutes), balancing the data update rate and equipment loss; the temperature from the lower part of the furnace body to the furnace waist increases and the change of the material surface 21 slows down, and the detection cycle is gradually extended to 36-70 minutes, reducing the damage of high temperature to the probe 13.

[0193] Frequent charging in the upper section of the blast furnace 100 causes the charge level 21 to change rapidly, requiring high-frequency detection to improve safety during the lowering of the charge level 21. Lower charge gradually melts, causing the charge level 21 to drop slowly, requiring low-frequency detection to meet control requirements. By reducing the number of detections in high-temperature areas, the probe 13's exposure to high temperatures is reduced, extending its service life.

[0194] In some embodiments, when the detection cycle is long, the cloth model can be used to predict the change trend of the material surface 21, and the model parameters can be dynamically corrected in combination with the detection data to achieve "detection-prediction-control" closed-loop optimization.

[0195] If the detection results of the material surface 21 in a certain area are abnormal for multiple consecutive times (such as fluctuations exceeding a threshold), the detection cycle of the area will be automatically shortened to enhance the ability to respond to abnormal working conditions.

[0196] The material level detection and control method for the blast furnace 100 provided in the embodiment of the present application may be executed by the material level detection and control device of the blast furnace 100. In the embodiment of the present application, the material level detection and control method for the blast furnace 100 is executed by the material level detection and control device of the blast furnace 100 as an example to illustrate the material level detection and control device of the blast furnace 100 provided in the embodiment of the present application.

[0197] The embodiment of the present application also provides a material level detection and control device for the blast furnace 100 .

[0198] like Figure 6 As shown, the material level detection control device of the blast furnace 100 includes: a first control module 31, a first acquisition module 32, a judgment module 33, a calculation module 34, a second control module 35, a third control module 36, a second acquisition module 37 and a fourth control module 38.

[0199] A first control module 31 is used to control the drive motor 14 to output a first lifting torque, wherein the first lifting torque is smaller than the gravity torque of the matching member, so as to lower the counterweight member;

[0200] A first acquisition module 32 is configured to acquire the real-time current of the drive motor 14 and the rotation speed of the output end of the drive motor 14 ;

[0201] A judgment module 33, configured to judge whether the counterweight contacts the material surface 21 when the real-time current increases or the rotation speed decreases;

[0202] A calculation module 34 is used to obtain the number of rotations of the output end of the driving motor 14 and calculate the height of the material surface 21 according to the number of rotations;

[0203] A second control module 35 is used to control the drive motor 14 to output a second lifting torque, wherein the second lifting torque is greater than the gravity torque of the counterweight, so as to lift the counterweight;

[0204] The third control module 36 is used to obtain the reverse rotation number of the output end of the drive motor 14 and control the drive motor 14 to stop working when the reverse rotation number is the same as the rotation number;

[0205] The second acquisition module 37 is used to obtain the temperature of the probe 13;

[0206] The fourth control module 38 is used to control the cooling assembly 16 to cool the probe 13 according to the temperature and the material level.

[0207] According to the material level detection and control device for the blast furnace 100 provided in the embodiment of the present application, the rotating detector 15 cooperates with the controller to achieve accurate measurement of the material level height, thereby improving detection efficiency and accuracy. The temperature detector 17 and the cooling component 16 work together to intelligently adjust the cooling strategy according to the actual temperature of the probe 13 and the depth of the material level 21, effectively reducing the risk of damage to the probe 13 due to high temperature, greatly improving the stability and service life of the device, and ensuring the efficient and reliable operation of the blast furnace material level detection work. When detecting the temperature of the probe 13, the controller can control the cooling component 16 to execute different cooling strategies when the probe 13 is at different heights or at different temperatures on the surface of the probe 13, thereby reducing the probability of the probe 13 failing due to high temperature, improving the stability of the device, and improving detection efficiency and accuracy.

[0208] The material level detection and control device of the blast furnace 100 in the embodiment of the present application can be an electronic device, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device 700 can be a terminal, or can be other devices other than a terminal. For example, the electronic device 700 can be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), etc. It can also be a server, a network attached storage 702 (NAS), a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc., and the embodiment of the present application is not specifically limited.

[0209] The charge level detection and control device for the blast furnace 100 in the embodiment of the present application may be a device having an operating system. The operating system may be a Linux system, a VxWorks system, a QNX system, a Microsoft (Windows) operating system, an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0210] The material level detection and control device of the blast furnace 100 provided in the embodiment of the present application can achieve Figure 5 To avoid repetition, the various processes implemented in the method embodiment are not described here.

[0211] In some embodiments, as Figure 7 As shown, an embodiment of the present application also provides an electronic device 700, including a processor 701, a memory 702, and a computer program stored in the memory 702 and executable on the processor 701. When the program is executed by the processor 701, each process of the embodiment of the material surface detection control method of the blast furnace 100 described above is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0212] It should be noted that the electronic device 700 in the embodiment of the present application includes the above-mentioned mobile electronic device and non-mobile electronic device.

[0213] An embodiment of the present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the above-mentioned embodiment of the material surface detection control method for the blast furnace 100 are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0214] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0215] An embodiment of the present application further provides a computer program product, including a computer program, which implements the above-mentioned material level detection and control method of the blast furnace 100 when executed by a processor.

[0216] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0217] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, which are coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-mentioned embodiment of the material surface detection control method for the blast furnace 100, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0218] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0219] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0220] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0221] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0222] In the description of this application, “plurality” means two or more.

[0223] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0224] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0225] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0226] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A blast furnace charge level detection device, characterized in that: include: The housing has a mounting cavity and a guide cavity that are interconnected, wherein the guide cavity is provided at the lower side of the mounting cavity and extends in a height direction; A drum is rotatably mounted in the mounting cavity, and a steel wire rope is wound around the drum; a probe, movably arranged in the guide cavity, comprising a counterweight and a connecting rope connected to the counterweight, the connecting rope being braided and connected to the steel wire rope, and an opening for the counterweight to extend out of the lower end of the housing; a driving motor, connected to the drum via a power coupling to drive the drum to rotate; a rotation detector connected to the output end of the drive motor to detect the number of rotations and the rotation speed of the output end of the drive motor; A cooling assembly is installed on the housing, the cooling assembly has multiple cooling modes, and is used to cool the probe; a temperature detector, mounted on the housing and corresponding to the guide cavity, for detecting the temperature of the probe; A controller is electrically connected to the drive motor, the rotation detector, the cooling assembly and the temperature detector. The controller is configured to control the lifting and lowering of the counterweight by controlling the output torque of the drive motor. The controller is configured to determine whether the counterweight is in contact with the material surface based on the current of the drive motor. The controller is configured to obtain the material surface height based on the number of rotations. The controller is configured to control the cooling assembly to cool the probe in different cooling modes based on the temperature of the counterweight and the material surface height.

2. The blast furnace charge level detection device according to claim 1, characterized in that: The cooling assembly includes a nitrogen pipeline, an industrial water pipeline, a water injection pipeline and an overflow pipeline connected to the guide cavity. The nitrogen pipeline is provided with a nitrogen shut-off valve, the industrial water pipeline is provided with an industrial water shut-off valve, the water injection pipeline is provided with a water injection shut-off valve, and the overflow pipeline is provided with an overflow shut-off valve. The overflow pipeline is provided on the upper side of the water injection pipeline. The housing is also provided with a shut-off valve, and the shut-off valve is provided on the lower side of the water injection pipeline for controlling the on-off of the guide cavity. The controller is electrically connected to the nitrogen shut-off valve, the industrial water shut-off valve, the water injection shut-off valve, the overflow shut-off valve and the shut-off valve, and is configured to control the opening and closing of the nitrogen shut-off valve, the industrial water shut-off valve, the water injection shut-off valve, the overflow shut-off valve and the shut-off valve according to the temperature of the counterweight and the material level.

3. The blast furnace charge level detection device according to claim 2, characterized in that: The shell is provided with a nozzle, the nitrogen pipeline is connected to the nozzle, the industrial water pipeline is connected to the nitrogen pipeline, and the connection position of the industrial water pipeline and the nitrogen pipeline is located on the side of the nitrogen shut-off valve close to the shell.

4. The blast furnace charge level detection device according to any one of claims 1 to 3, characterized in that: Also includes: A first reducer, the drive motor is installed on one side of the shell, the input end of the first reducer is dynamically coupled with the output shaft of the drive motor, the output end of the first reducer is connected to the reel through a rotating shaft passing through the shell, and the rotation detector is arranged at the output end of the first reducer.

5. The blast furnace charge level detection device according to claim 4, characterized in that: It also includes a second reducer and a master controller. The output end of the first reducer includes a first shaft end and a second shaft end distributed on both sides of the reducer. The first shaft end is dynamically coupled with the rotating shaft. The input end of the second reducer is connected to the second shaft end through a floating coupling. The rotation detector is installed at the output end of the second reducer. The master controller is coupled to the output end of the second reducer. The controller is electrically connected to the master controller.

6. The blast furnace charge level detection device according to any one of claims 1 to 3, characterized in that: The shell is provided with an inspection port communicating with the guide cavity, and the temperature detector is arranged on the upper side of the inspection port.

7. A blast furnace, characterized in that: include: A furnace body having a furnace cavity for accommodating furnace charge; The blast furnace charge level detection device according to any one of claims 1 to 6, wherein the shell is mounted on the top of the furnace body, and the lower end of the shell passes through the furnace body so that the opening extends into the furnace cavity; There are multiple blast furnace material level detection devices, and the multiple blast furnace material level detection devices are evenly distributed along the circumference of the furnace body.

8. A blast furnace material level detection and control method according to claim 7, characterized in that: The control method includes: controlling the driving motor to output a first lifting torque, wherein the first lifting torque is smaller than the gravity torque of the matching member, so as to lower the counterweight member; Acquiring the real-time current of the drive motor and the rotation speed of the output end of the drive motor; When the real-time current increases or the rotation speed decreases, determining that the counterweight is in contact with the material surface; Obtaining the number of rotations of the output end of the driving motor, and calculating the height of the material surface according to the number of rotations; controlling the drive motor to output a second lifting torque, wherein the second lifting torque is greater than the gravity torque of the counterweight, so as to lift the counterweight; Obtaining the reverse rotation number of the output end of the drive motor, and controlling the drive motor to stop working when the reverse rotation number is the same as the rotation number; obtaining the temperature of the probe; The cooling component is controlled to cool the probe according to the temperature and the material level.

9. The blast furnace material level detection and control method according to claim 8, characterized in that: The cooling assembly includes a nitrogen pipeline, an industrial water pipeline, a water injection pipeline and an overflow pipeline connected to the guide cavity. The nitrogen pipeline is provided with a nitrogen shut-off valve, the industrial water pipeline is provided with an industrial water shut-off valve, the water injection pipeline is provided with a water injection shut-off valve, and the overflow pipeline is provided with an overflow shut-off valve. The overflow pipeline is provided on the upper side of the water injection pipeline. The housing is also provided with a shut-off valve, and the shut-off valve is provided on the lower side of the water injection pipeline for controlling the on-off of the guide cavity. The controlling the cooling component to cool the probe according to the temperature and the material level includes: When the material level is at or above the upper portion of the blast furnace shaft, the nitrogen gate valve is controlled to open to a first opening, wherein the first opening is 30% to 50%; When the material level is above the upper portion of the blast furnace shaft and the temperature is greater than a first temperature, controlling the nitrogen shut-off valve and the industrial water shut-off valve to open to a first opening, wherein the first temperature is 250° C. to 300° C.; When the material level is between the upper and lower parts of the blast furnace body, controlling the nitrogen shut-off valve and the industrial water shut-off valve to open to a first opening; When the material level is between the upper and lower parts of the blast furnace shaft and the temperature is greater than a second temperature, the nitrogen shut-off valve and the industrial water shut-off valve are controlled to open to a second opening, wherein the second temperature is 350° C. to 400° C. and the first opening is 60% to 80%; When the material level is at or below the lower part of the blast furnace body, controlling the nitrogen shut-off valve and the industrial water shut-off valve to open to the maximum opening; When the material level is at the lower part of the furnace body of the blast furnace and the temperature is greater than the third temperature, the nitrogen gate valve, the industrial water gate valve and the shut-off valve are controlled to be closed, the water injection gate valve and the overflow gate valve are controlled to be opened, and when water is detected flowing out of the water injection gate valve, the water injection gate valve is controlled to be closed, wherein the third temperature is 450°C to 500°C.

10. The blast furnace material level detection and control method according to claim 8, characterized in that: The control method further includes: When the material level is located at or above the upper portion of the blast furnace shaft, performing material level detection once every first time period, wherein the first time period is 8 minutes to 12 minutes; When the material level is between the upper and lower parts of the blast furnace shaft, performing material level detection once every second time period, the second time period being 18 minutes to 22 minutes; When the material level is between the lower part of the blast furnace shaft and the furnace waist of the blast furnace, performing material level detection once every third time period, the third time period being 36 minutes to 44 minutes; When the material level is located at or below the furnace waist of the blast furnace, the material level detection is performed every fourth time period, and the fourth time period is 50 minutes to 70 minutes.

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