A converter tapping system and method with controllable chute position

Abstract

This invention discloses a converter tapping system with controllable chute position, including a ladle, a ladle drive assembly, a chute, a horizontal angle adjustment mechanism, a lifting drive mechanism, a rangefinder, and a controller. The ladle is connected to the drive end of the ladle drive assembly. The front end of the chute is positioned above the ladle at the tapping station, and the rear end of the chute is connected to the drive end of the horizontal angle adjustment mechanism. The bottom of the chute is connected to the drive end of the lifting drive mechanism. The rangefinder is fixed to one end of the ladle drive assembly. The controller is electrically connected to the rangefinder, the ladle drive assembly, the lifting drive mechanism, and the horizontal angle adjustment mechanism. This invention also discloses a converter tapping method. The beneficial effects of this invention are: it enables adaptive adjustment of the chute's horizontal and vertical angles based on the ladle position, ensuring that the chute's feeding position is at the exact center of the ladle, which is beneficial for the full contact and melting of the alloy and molten steel, thus improving the quality of the molten steel.

Description

Technical Field

[0001] This invention relates to converter tapping control technology, specifically to a converter tapping system and method with controllable chute position. Background Technology

[0002] The control of the alloy chute during the converter tapping process is one of the core operations in the steelmaking refining process. Its importance is reflected in the following aspects: First, it can improve the recovery rate of alloying elements. A high recovery rate means that less alloy can be used to achieve the target composition, directly reducing production costs. The correct timing and location of addition (adding through the chute below the impact zone of the steel flow) allows the alloy to be quickly flushed into the interior of the molten steel with the steel flow, reducing air oxidation. Sufficient molten steel temperature and vigorous stirring are conducive to the rapid melting and uniform distribution of the alloy. Precise flow control (chute opening) avoids splash loss caused by adding too quickly or local supercooling and oxidation caused by adding too slowly. Secondly, it ensures the safety and stability of the process: Adding certain alloys (especially exothermic alloys) can lead to violent exothermic reactions and gas escape if not properly controlled (e.g., excessive or too rapid addition), resulting in severe ladle splashing and endangering equipment and personnel safety. Precise control of the alloy addition rate (chute opening) is crucial to preventing splashing. Adding lumpy alloys too quickly may cause them to sink to the bottom before melting, forming cold steel or clogging the ladle nozzle. Well-controlled chute flow helps the alloy to be added smoothly and melted quickly, and avoids issues such as alloy residue due to untimely chute closure or operational errors leading to open circuits. Thirdly, it enables uniform composition and narrow composition control: Accurate, timely, and sequential addition, combined with the powerful impact and stirring of the steel flow, is key to obtaining uniformly composed molten steel. The precision and response speed of chute control directly affect the uniformity of alloy distribution in the molten steel. Modern steelmaking has extremely strict requirements for steel composition control (narrow composition range). The stability and precision of chute control are the fundamental execution units for achieving this high-precision composition control. Fourth, it can improve the quality and performance stability of molten steel: accurate and uniform composition is the fundamental prerequisite for achieving the expected metallurgical performance and product quality stability of steel. Inaccurate alloy control may lead to excessive composition (unqualified or abnormal performance) or large deviations (large batch-to-batch fluctuations).

[0003] Therefore, the control of the alloy chute during the converter tapping process is particularly important for the quality of converter smelting.

[0004] However, currently, the alloy chute during converter steelmaking is mainly controlled manually. Due to issues such as high dust levels, poor visibility, and the high labor intensity of high-temperature operations, the control effect of the alloy chute is unsatisfactory, affecting the quality of the molten steel. Therefore, there is an urgent need to develop a self-matching control system and method for the alloy chute during converter steelmaking to improve the quality of the molten steel. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a converter tapping system and method with controllable chute position, aiming to solve the problem of poor alloy chute control affecting molten steel quality in existing technologies.

[0006] The technical solution adopted in this invention is: a converter tapping system with controllable chute position, including a ladle, a ladle drive assembly, a chute, a horizontal angle adjustment mechanism, a lifting drive mechanism, a rangefinder, and a controller; The ladle is connected to the drive end of the ladle drive assembly, and the ladle drive assembly drives the ladle to reciprocate between the hoisting station and the steel output station. The front end of the chute is positioned above the ladle at the steel tapping station, and the rear end of the chute is connected to the drive end of the horizontal angle adjustment mechanism, which drives the rear end of the chute to rotate horizontally. The bottom of the chute is connected to the drive end of the lifting drive mechanism, and the lifting drive mechanism drives the front end of the chute to rotate vertically around its rear end. The rangefinder is fixed at one end of the ladle drive assembly and is used to detect the real-time displacement of the ladle. The controller is electrically connected to the rangefinder, the ladle drive assembly, the lifting drive mechanism, and the horizontal angle adjustment mechanism, respectively.

[0007] According to the above scheme, the ladle drive assembly includes a track, a ladle car, and a walking motor; The track is provided in two parallel and spaced-apart sections. The ladle is placed on a ladle car, and the bottom sides of the ladle car are equipped with driving wheels, each driving wheel rolling in cooperation with the corresponding side track. The drive end of the walking motor is connected to the walking wheel.

[0008] According to the above scheme, the horizontal angle adjustment mechanism includes a rotating shaft, a gear transmission group, and a rotating motor; The upper end of the rotating shaft is connected to the rear end of the chute; the lower end of the rotating shaft is connected to the output end of the gear transmission assembly, and the input end of the gear transmission assembly is connected to the output end of the rotary motor.

[0009] According to the above scheme, the gear transmission assembly includes a driving gear and a driven gear that mesh with each other; The axle of the driving gear is coaxially connected to the motor shaft of the rotary motor, and the driven gear meshes with the driving gear for transmission; the lower end of the rotating shaft is coaxially and fixedly connected to the center of the driven gear.

[0010] According to the above scheme, the lifting drive mechanism is a hydraulic cylinder, which is fixed on the rotating shaft of the horizontal angle adjustment mechanism, and the piston rod end of the hydraulic cylinder is connected to the bottom of the chute.

[0011] According to the above scheme, the steel ladle is provided with trunnions on both sides for hoisting.

[0012] According to the above scheme, the rangefinder is a laser rangefinder.

[0013] According to the above scheme, an angle measuring instrument for measuring the horizontal rotation angle and tilt angle of the chute is installed on the chute.

[0014] According to the above scheme, the chute is made of alloy material.

[0015] This invention also employs a converter tapping method with controllable chute matching, the method being as follows: The controller sets the distance between the rangefinder and the ladle to a preset reference value a when the ladle car is in the steel discharge position, and sets the tilting angle of the chute to a preset tilting angle reference value β when the ladle car is in the steel discharge position. S1. In the initial state, the ladle car is at the hoisting position. The overhead crane hoists the ladle and places it on the ladle car. The real-time distance measurement value x of the ladle car is detected and recorded in real time. S2. Upon receiving the "pre-discharge" signal, the ladle car moves along the track away from the rangefinder. When the real-time distance measurement value x equals the preset reference value a, the travel motor stops rotating. At this time, the initial tilt angle γ of the chute equals the preset tilt angle β. The centerline of the chute is perpendicular to the line connecting the centerline of the rangefinder and the ladle. The front end of the chute coincides with the center point of the ladle. Simultaneously, the straight-line distance between the front end of the chute and the rotation axis in the top view is calibrated as S. S3. Upon receiving the "Steel Discharge" signal, the controller adjusts the actual position of the ladle car based on its real-time position information, synchronously collects and records the spacing measurement value x in real time, and executes the corresponding steps based on the spacing measurement value x: If x = a, the controller keeps the current angle and position of the chute unchanged; if a "Steel Discharge End" signal is received, step S6 is executed; otherwise, this step is repeated; if x > a, step S5 is executed; if x < a, step S4 is executed. S4. When x < a, obtain the deviation distance L of the front end of the chute along the direction of the ladle and the center line of the rangefinder, L = (ax), and rotate the chute counterclockwise by a horizontal angle α, where α = arctan(L / S) = arctan((ax) / S)); make the chute reach the target vertical tilt angle γ1 = arcsin((L / sinα) ÷ (S / sinβ)); S5. When x > a, obtain the deviation distance L of the front end of the chute along the line connecting the center line of the ladle and the rangefinder, L = (xa), and rotate the chute clockwise by a horizontal angle α, where α = arctan(L / S) = arctan((xa) / S)); make the chute reach the target vertical tilt angle γ1 = arcsin((L / sinα) ÷ (S / sinβ)); S6. Feeding stops, the hopper above the chute stops feeding material into the chute, and the chute returns to its initial position; S7. The ladle car moves along the track toward the distance measuring instrument and stops moving when it reaches the hoisting position. S8. Use a crane to lift the ladle full of molten steel from the ladle car, and the process ends.

[0016] The beneficial effects of this invention are as follows: This invention designs a ladle and ladle drive assembly to ensure that the steel flow is centered in the ladle during converter tapping. It also designs a horizontal angle adjustment mechanism, a lifting drive mechanism, and a rangefinder. The rangefinder detects the ladle position in real time, and the horizontal angle adjustment mechanism is activated based on the ladle position to drive the chute to rotate horizontally, achieving adaptive adjustment of the chute's angle in the horizontal direction. Simultaneously, the lifting drive mechanism drives the chute to rotate vertically, achieving adaptive adjustment of the chute's angle in the vertical direction. This ensures that the alloy chute's feeding position is centered in the ladle, facilitating sufficient contact and melting of the alloy with the molten steel during the feeding process, improving alloy yield, and enhancing steel quality. This solves the problem of poor alloy chute control affecting steel quality mentioned in existing technologies. Attached Figure Description

[0017] Figure 1 This is a top view of Embodiment 1 in its initial state.

[0018] Figure 2 This is the front view of Embodiment 1 in its initial state.

[0019] Figure 3 This is a top view of Embodiment 1 in its working state.

[0020] Figure 4 This is the front view of Embodiment 1 in its working state.

[0021] The markings in the diagram are as follows: 1. Ladle car; 2. Ladle; 3. Trunnion; 4. Molten steel; 5. Travel motor; 6. Travel wheel; 7. Track; 8. Chute; 9. Lifting drive mechanism; 10. Rotating shaft; 11. Driven gear; 12. Driving gear; 13. Rotating motor; 14. Rangefinder. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0025] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples, without contradiction. Additionally, the term "a plurality of" indicates two or more.

[0027] like Figures 1-2 The converter tapping system with controllable chute position shown includes a ladle 2, a ladle drive assembly, a chute 8, a horizontal angle adjustment mechanism, a lifting drive mechanism 9, a rangefinder 14, and a controller. The ladle 2 is connected to the drive end of the ladle drive assembly, and the ladle drive assembly drives the ladle 2 to reciprocate between the hoisting station and the steel output station; The front end of the chute 8 is positioned above the ladle 2 at the steel tapping station, and the rear end of the chute 8 is connected to the drive end of the horizontal angle adjustment mechanism, which drives the rear end of the chute 8 to rotate horizontally in the circumferential direction. The bottom of the chute 8 is connected to the drive end of the lifting drive mechanism 9, and the lifting drive mechanism 9 drives the front end of the chute 8 to rotate vertically around its rear end. The rangefinder 14 is fixed to one end of the ladle drive assembly and is used to detect the real-time displacement of the ladle 2. The controller is electrically connected to the rangefinder 14, the ladle drive assembly, the lifting drive mechanism 9, and the horizontal angle adjustment mechanism, respectively. The controller controls the ladle drive assembly, the lifting drive mechanism 9, and the horizontal angle adjustment mechanism to work together according to the displacement data of the ladle 2 detected by the rangefinder 14.

[0028] In this invention, the hoisting station is the hoisting and transfer operation area for the ladle 2. The overhead crane places the empty ladle 2 on the ladle car 1, or hoists and transfers the ladle 2 after it has been filled with molten steel 4. The tapping station is the molten steel 4 receiving operation area. The empty ladle 2 at this station receives the molten steel 4 output from the converter through the chute 8.

[0029] In this invention, the chute 8 is made of alloy material.

[0030] Preferably, the ladle drive assembly includes a track 7, a ladle car 1, and a travel motor 5; The track 7 is provided in two parallel and spaced apart. The ladle 2 is placed on the ladle car 1, and the bottom sides of the ladle car 1 are respectively equipped with traveling wheels 6, and each traveling wheel 6 is in rolling cooperation with the corresponding side track 7. The drive end of the walking motor 5 is connected to the walking wheel 6.

[0031] In this invention, the track 7 is laid along the straight line from the hoisting position to the unloading position of the ladle 2; the walking motor 5 is connected to the controller, and the walking motor 5 drives the walking wheels 6 to roll along the length of the track 7, thereby causing the ladle 2 on the ladle car 1 to move back and forth between the hoisting position and the unloading position.

[0032] Preferably, the horizontal angle adjustment mechanism includes a rotating shaft 10, a gear transmission group, and a rotary motor 13; The upper end of the rotating shaft 10 is connected to the rear end of the chute 8; the lower end of the rotating shaft 10 is connected to the output end of the gear transmission group, and the input end of the gear transmission group is connected to the output end of the rotary motor 13.

[0033] In this invention, the rear end of the chute 8 can rotate horizontally in circumferential direction synchronously with the rotating shaft 10, driving the front end of the chute 8 to rotate synchronously, and the chute 8 can rotate vertically relative to the upper end of the rotating shaft 10.

[0034] Preferably, the gear transmission assembly includes a driving gear 12 and a driven gear 11 that mesh with each other; The axle of the driving gear 12 is coaxially connected to the motor shaft of the rotary motor 13, and the driven gear 11 meshes with the driving gear 12 for transmission; the lower end of the rotating shaft 10 is coaxially and fixedly connected to the center of the driven gear 11.

[0035] In this invention, the axes of the driving gear 12 and the driven gear 11 are both vertical axes; the rotary motor 13 is electrically connected to the controller; when the rotary motor 13 drives the driving gear 12 to rotate around its vertical axis, the driven gear 11 meshing with the driving gear 12 rotates synchronously, and drives the rotating shaft 10 to rotate around its own vertical axis, thereby driving the chute 8 connected to the top of the rotating shaft 10 to rotate its front end around its rear end in the horizontal direction, thereby realizing the adjustment of the horizontal angle of the chute 8.

[0036] Preferably, the lifting drive mechanism 9 is a hydraulic cylinder, which is fixed on the rotating shaft 10 of the horizontal angle adjustment mechanism, and the piston rod end of the hydraulic cylinder is connected to the bottom of the chute 8.

[0037] In this invention, the hydraulic cylinder rotates synchronously in the horizontal direction with the rotating shaft 10 and the chute 8; the hydraulic cylinder is electrically connected to the controller, and when the piston rod of the hydraulic cylinder extends and retracts, it can drive the front end of the chute 8 to rotate up and down around its rear end, thereby realizing the adjustment of the vertical angle of the chute 8 (that is, the tilting angle mentioned later).

[0038] Preferably, the steel ladle 2 is provided with trunnions 3 on both sides for hoisting.

[0039] Example 1 like Figure 1 The diagram illustrates a converter tapping system with controllable chute position, comprising: a ladle car 1, a ladle 2, molten steel 4, a traveling motor 5, traveling wheels 6, a track 7, a chute 8, a lifting drive mechanism 9, a rotating shaft 10, a driven gear 11, a driving gear 12, a rotating motor 13, a rangefinder 14, and a controller. The specific structural arrangement of this system is as follows: The ladle car 1 is mounted on the track 7 via traveling wheels 6, and its position on the track 7 can be moved and adjusted by the traveling motor 5 driving the traveling wheels 6. A ladle 2 is placed on the ladle car 1 to receive molten steel 4. The ladle 2 is lifted by the cooperation of the crane hook and the trunnion 3. One or more rangefinders 14 are installed on one side of the ladle 2, i.e., one end of the track 7. The rangefinders 14 are used to detect the real-time position of the ladle 2. When the ladle car 1 is in the steel tapping position, the distance between the rangefinder 14 and the outer shell of the ladle 2 is a preset reference value a. A chute assembly 8 is designed above the ladle 1 and the ladle 2. The chute assembly 8 includes the chute 8, a lifting drive mechanism 9, a rotating shaft 10, a driven gear 11, a driving gear 12, and a rotary motor 13. The rear end of the chute 8 is connected to the rotating shaft 10, which is mounted on the driven gear 11. The driving gear 12 meshes with the driven gear 11. When the rotary motor 13 above the driving gear 12 rotates, the driving gear 12 rotates and drives the driven gear 11, the rotating shaft 10, and the chute 8 to rotate around the axis of the driven gear 11, thereby adjusting the horizontal angle α of the chute 8 (e.g., ...). Figure 3 As shown, specifically, the angle between the projection of the chute 8 on the ground and the perpendicular line drawn from its hinge point to the guide rail; a lifting drive mechanism 9 is designed on the chute 8 and the rotating shaft 10, and the tilting angle γ of the chute 8 is achieved by the lifting drive mechanism 9 (e.g., Figure 4 The angle shown is the angle between the bottom surface of the chute 8 and the vertical line (also the angle between the axis of the chute 8 along its length and the vertical line). Since the lifting drive mechanism 9 is mounted on the rotating shaft 10, the chute 8 can achieve a combination of free tilting and rotational movement under the simultaneous action of the driven gear 11 and the lifting drive mechanism 9. When the ladle car 1 is in the steel tapping position, the tilting angle γ of the chute 8 is the set reference value β. The rangefinder 14 is a laser rangefinder; an angle measuring instrument is installed on the chute 8 to measure the horizontal rotation angle and tilting angle of the chute 8.

[0040] Example 2 This embodiment uses the system described in Embodiment 1 and proposes a converter steel tapping method with controllable chute matching. The method is as follows: The controller sets the distance between the rangefinder 14 and the outer shell of the ladle 2 when the ladle car 1 is in the steel discharge position to a preset reference value a, and sets the tilting angle of the chute 8 when the ladle car 1 is in the steel discharge position to a preset tilting angle reference value β (at this time, the vertical distance between the front end of the chute 8 and the upper end of the ladle 2 is H). S1, such as Figure 1 and Figure 2 As shown, in the initial state, the ladle car 1 is at the hoisting position (located close to the rangefinder 14). The overhead crane hoists the ladle 2 and places it on the ladle car 1. The rangefinder 14 is then activated to detect and record the real-time distance measurement value x of the ladle car 1. S2. Upon receiving the "pre-discharge" signal, the controller controls the walking motor 5 on the ladle car 1 to drive the walking wheels 6 to rotate, causing the ladle car 1 to move along the track 7 in a direction away from the rangefinder 14. When the real-time distance measurement value x fed back by the rangefinder 14 is equal to the preset reference value a, the controller controls the walking motor 5 to stop rotating. At this time, the initial tilting angle γ of the chute 8 is equal to the preset tilting angle β, and in the top view, the center line of the chute 8 is perpendicular to the line connecting the center line of the rangefinder 14 and the ladle 2, and the front end of the chute 8 coincides with the center point of the ladle 2. At the same time, the straight-line distance between the front end of the chute 8 and the rotating shaft 10 in the top view is calibrated as S. S3. Upon receiving the "Steel Discharge" signal, the controller adjusts the actual position of the ladle car 1 according to its real-time position information. The rangefinder 14 synchronously collects and records the spacing measurement value x in real time. Based on the spacing measurement value x, the controller executes the corresponding steps: If x = a, the controller keeps the current angle and position of the chute 8 unchanged. If a "Steel Discharge End" signal is received, step S6 is executed; otherwise, this step is repeated. If x > a, step S5 is executed. If x < a, step S4 is executed. S4, such as Figure 3 and Figure 4 As shown, when x < a, the deviation distance L of the front end of the chute 8 along the direction of the center line between the ladle 2 and the rangefinder 14 is obtained, L = (ax). The controller controls the rotary motor 13 to drive the active gear 12 and the driven gear 11 to mesh and transmit, causing the chute 8 to rotate counterclockwise by a horizontal angle α, where α = arctan(L / S) = arctan((ax) / S)). Then, the lifting drive mechanism 9 is controlled to move, so that the chute 8 reaches the target vertical tilt angle γ1 = arcsin((L / sinα) ÷ (S / sinβ)). The specific method is as follows: When x < a, in the top view ( Figure 3From the top view, the front end of the chute 8 deviates by a distance L along the center line of the ladle 2 and the rangefinder 14, where L = (ax). The front end of the chute 8 should move downward by a distance L (by rotating the front end of the chute 8 counterclockwise). Since the straight-line distance between the front end of the chute 8 and the rotation axis 10 in the top view is S ( Figure 1 According to the right triangle function relationship, the controller controls the rotary motor 13 to drive the active gear 12 and the driven gear 11 to mesh and transmit power, causing the chute 8 to rotate counterclockwise by a horizontal angle α, where α = arctan(L / S) = arctan((ax) / S). This horizontal angle can be measured by an angle meter installed on the chute 8 or an encoder on the rotary motor 13 to ensure the correctness of the angle rotation. Since the position of the front end of the chute 8 cannot be guaranteed to be directly above the center point of the ladle 2 if the vertical tilt angle γ of the chute 8 is not adjusted after the horizontal rotation angle α, the vertical tilt angle of the chute 8 needs to be adjusted incrementally. After the chute 8 rotates horizontally, a cross-sectional view is formed by cutting downward along the center line of the chute 8. The length of the chute 8 around the hinge point is a constant value, and this length is the hypotenuse of the right triangle, the value of which is from... Figure 1 The value can be calculated as S / sinβ, and the length of one right-angled side of this triangle is L / sinα. Therefore, the target vertical tilt angle γ1 of the chute 8 is calculated as arcsin((L / sinα)÷(S / sinβ)). The controller controls the lifting drive mechanism 9 to adjust the vertical tilt angle of the chute 8 by setting the increment as γ1-β. Measurements are taken using an angle meter installed vertically on the chute 8 or a sensor installed on the lifting drive mechanism 9 to ensure the accuracy and reliability of the angle adjustment. After the tilt angle is adjusted, the vertical distance between the front end of the chute 8 and the upper end of the ladle 2 is C. After the vertical tilt angle of the chute 8 is adjusted, material is continuously fed into the chute 8 through the hopper above it, and alloy is added to the ladle 2. If a "steel tapping end" signal is received, step S6 is performed; otherwise, step S3 is performed after the angle adjustment is completed. S5. When x > a, obtain the deviation distance L of the front end of the chute 8 along the line connecting the center line of the ladle 2 and the rangefinder 14, where L = (xa). The controller controls the rotary motor 13 to drive the active gear 12 and the driven gear 11 to mesh and transmit power, causing the chute 8 to rotate clockwise by a horizontal angle α, where α = arctan(L / S) = arctan((xa) / S)). Control the lifting drive mechanism 9 to move, so that the chute 8 reaches the target vertical tilt angle γ1 = arcsin((L / sinα) ÷ (S / sinβ)). The specific method is as follows: When x > a, in the top view, the front end of chute 8 deviates upward by a distance L along the line connecting the center line of ladle 2 and rangefinder 14, where L = (xa). The front end of chute 8 should move upward by a distance L (by rotating the front end of chute 8 clockwise). Since the straight-line distance between the front end of chute 8 and the rotating shaft 10 in the top view is S, according to the right triangle function relationship, the controller controls the rotary motor 13 to drive the active gear 12 and the driven gear 11 to mesh and transmit, causing chute 8 to rotate clockwise by an angle α, where α = arctan(L / S) = arctan((xa) / S)). The rotation angle can be detected in real time using an angle gauge installed on the chute 8 or an encoder integrated into the rotary motor 13 to ensure the accuracy of the rotation angle. Since the vertical tilt angle γ of the chute 8 cannot be adjusted after rotation angle α, the position of the front end of the chute 8 cannot be guaranteed to be directly above the center point of the ladle 2. Therefore, the vertical tilt angle γ of the chute 8 must be adjusted incrementally. After the chute 8 rotates by angle α, a cross-sectional view is formed by cutting downwards along the centerline of the chute 8. Since the length of the chute 8 around the hinge point is a constant and this length is the hypotenuse of a right triangle, its value starts from... Figure 1 The value can be calculated as S / sinβ; and the length of one leg of a right triangle is L / sinα. Therefore, the target vertical tilt angle γ1 of the chute 8 is calculated as arcsin((L / sinα)÷(S / sinβ)). The controller controls the lifting drive mechanism 9 to adjust the vertical tilt angle of the chute 8 by setting the increment as γ1-β. The rotation angle of the chute 8 is measured by a vertical angle meter installed on the chute 8 or a sensor integrated into the lifting drive mechanism 9 to ensure the accuracy and reliability of the angle adjustment. After the tilt angle of the chute 8 is rotated to the correct position, material is continuously fed into the chute 8 through the hopper above it, and alloy is added to the ladle 2 simultaneously. If the "Steel tapping end" signal is received, step S6 is performed; otherwise, step S3 is performed after the tilt angle adjustment is completed. S6, feeding stops, the hopper above the chute 8 stops feeding material to the chute 8, and the chute 8 returns to its initial position under the action of the rotary motor 13 and the lifting drive mechanism 9; S7. The controller controls the walking motor 5 of the ladle car 1 to drive the walking wheels 6 to rotate, so that the ladle car 1 moves on the track 7 in the direction of approaching the rangefinder 14; when the ladle car 1 reaches the hoisting position, it stops moving and the rangefinder 14 stops working. S8. Use a crane to lift the ladle 2, which is filled with molten steel 4, from the ladle car 1. The process ends.

[0041] This invention achieves self-judgment and self-adjustment of the ladle 2 position through real-time online precise measurement using a laser rangefinder 14. The bottom of the chute 8 is designed with a rotating shaft 10, a driving gear 12, a driven gear 11, and a rotary motor 13, enabling adaptive adjustment of the chute 8's horizontal angle based on the ladle 2 position. A lifting drive mechanism is also designed at the bottom of the chute 8, enabling adaptive adjustment of the chute 8's vertical angle based on the ladle 2 position. Through the self-judgment and self-adjustment of the ladle 2 position, the steel flow is ensured to be centered on the ladle 2 during converter tapping. Simultaneously, the self-adjustment of the chute 8's angle also ensures that the charging position of the chute 8 is centered on the ladle 2. Actual production verification shows that the system and method described in this invention can ensure that the alloy accurately falls into the mainstream area of ​​the molten steel during the charging process, forming sufficient and uniform contact with the molten steel 4, significantly improving alloy melting and diffusion conditions, effectively increasing alloy yield, and enhancing the accuracy of steel composition control and smelting stability.

[0042] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0043] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A converter tapping system with controllable chute position, characterized in that, Includes a ladle, ladle drive assembly, chute, horizontal angle adjustment mechanism, lifting drive mechanism, rangefinder and controller; The ladle is connected to the drive end of the ladle drive assembly, and the ladle drive assembly drives the ladle to reciprocate between the hoisting station and the steel output station. The front end of the chute is positioned above the ladle at the steel tapping station, and the rear end of the chute is connected to the drive end of the horizontal angle adjustment mechanism, which drives the rear end of the chute to rotate horizontally. The bottom of the chute is connected to the drive end of the lifting drive mechanism, and the lifting drive mechanism drives the front end of the chute to rotate vertically around its rear end. The rangefinder is fixed at one end of the ladle drive assembly and is used to detect the real-time displacement of the ladle. The controller is electrically connected to the rangefinder, the ladle drive assembly, the lifting drive mechanism, and the horizontal angle adjustment mechanism, respectively.

2. The converter tapping system with controllable chute position as described in claim 1, characterized in that, The ladle drive assembly includes a track, a ladle car, and a travel motor; The track is provided in two parallel and spaced-apart sections. The ladle is placed on a ladle car, and the bottom sides of the ladle car are equipped with driving wheels, each driving wheel rolling in cooperation with the corresponding side track. The drive end of the walking motor is connected to the walking wheel.

3. The converter tapping system with controllable chute position as described in claim 1, characterized in that, The horizontal angle adjustment mechanism includes a rotating shaft, a gear transmission assembly, and a rotary motor; The upper end of the rotating shaft is connected to the rear end of the chute; the lower end of the rotating shaft is connected to the output end of the gear transmission assembly, and the input end of the gear transmission assembly is connected to the output end of the rotary motor.

4. The converter tapping system with controllable chute position as described in claim 3, characterized in that, The gear transmission assembly includes a driving gear and a driven gear that mesh with each other; The axle of the driving gear is coaxially connected to the motor shaft of the rotary motor, and the driven gear meshes with the driving gear for transmission; the lower end of the rotating shaft is coaxially and fixedly connected to the center of the driven gear.

5. The converter tapping system with controllable chute position as described in claim 3 or 4, characterized in that, The lifting drive mechanism is a hydraulic cylinder, which is fixed on the rotating shaft of the horizontal angle adjustment mechanism, and the piston rod end of the hydraulic cylinder is connected to the bottom of the chute.

6. The converter tapping system with controllable chute position as described in claim 1, characterized in that, The ladle is provided with trunnions on both sides for hoisting.

7. The converter tapping system with controllable chute position as described in claim 1, characterized in that, The rangefinder is a laser rangefinder.

8. The converter tapping system with controllable chute position as described in claim 1, characterized in that, An angle measuring instrument is installed on the chute to measure the horizontal rotation angle and tilt angle of the chute.

9. The converter tapping system with controllable chute position as described in claim 1, characterized in that, The chute is made of alloy material.

10. A converter tapping method with controllable chute matching, characterized in that, The method is as follows: The controller sets the distance between the rangefinder and the ladle to a preset reference value a when the ladle car is in the steel discharge position, and sets the tilting angle of the chute to a preset tilting angle reference value β when the ladle car is in the steel discharge position. S1. In the initial state, the ladle car is at the hoisting position. The overhead crane hoists the ladle and places it on the ladle car. The real-time distance measurement value x of the ladle car is detected and recorded in real time. S2. Upon receiving the "pre-discharge" signal, the ladle car moves along the track away from the rangefinder. When the real-time distance measurement value x equals the preset reference value a, the travel motor stops rotating. At this time, the initial tilt angle γ of the chute equals the preset tilt angle β. The centerline of the chute is perpendicular to the line connecting the centerline of the rangefinder and the ladle, and the front end of the chute coincides with the center point of the ladle. Simultaneously, the straight-line distance between the front end of the chute and the rotation axis in the top view is calibrated as S. S3. Upon receiving the "Steel Discharge" signal, the controller adjusts the actual position of the ladle car based on its real-time position information, synchronously collects and records the spacing measurement value x in real time, and executes the corresponding steps based on the spacing measurement value x: If x = a, the controller keeps the current angle and position of the chute unchanged; if a "Steel Discharge End" signal is received, step S6 is executed; otherwise, this step is repeated; if x > a, step S5 is executed; if x < a, step S4 is executed. S4. When x < a, obtain the deviation distance L of the front end of the chute along the direction of the ladle and the center line of the rangefinder, L = (ax), and rotate the chute counterclockwise by a horizontal angle α, where α = arctan(L / S) = arctan((ax) / S)); make the chute reach the target vertical tilt angle γ1 = arcsin((L / sinα) ÷ (S / sinβ)); S5. When x > a, obtain the deviation distance L of the front end of the chute along the line connecting the center line of the ladle and the rangefinder, L = (xa), and rotate the chute clockwise by a horizontal angle α, where α = arctan(L / S) = arctan((xa) / S)); make the chute reach the target vertical tilt angle γ1 = arcsin((L / sinα) ÷ (S / sinβ)); S6. Feeding stops, the hopper above the chute stops feeding material into the chute, and the chute returns to its initial position; S7. The ladle car moves along the track toward the distance measuring instrument and stops moving when it reaches the hoisting position. S8. Use a crane to lift the ladle full of molten steel from the ladle car, and the process ends.

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