Molten steel depth measuring device and method suitable for continuous casting tundish
By designing a water-steel depth measurement device including movement, lifting, tilt adjustment, bottoming and liquid level detection parts, the problems of large measurement errors and high labor intensity in the prior art are solved, and efficient and accurate measurement of the water-steel depth in the continuous casting tundra is achieved.
Patent Information
- Application Number
- CN202510178926.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-05-23
AI Technical Summary
When measuring the depth of steel in the continuous casting tundra, the prior art has problems such as high labor intensity, large measurement errors, and failure to consider the erosion factors of refractory bricks.
A water-steel depth measurement device including a moving part, a lifting part, an inclination adjustment part, a bottom probe part and a liquid level detection part is designed. Through the combination of the bottom probe column and the bottom contact cone, combined with the use of an infrared rangefinder and a winch, the accurate measurement of the depth of the steel molten steel in the tundra is achieved.
The device can efficiently and accurately measure the depth of steel in the tundra, reduce the labor intensity of staff, improve the efficiency and accuracy of measurement, and reduce errors.
Smart Images
Figure CN120027876A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a molten steel depth measuring device and method suitable for a continuous casting tundish, in particular to a device and method capable of accurately measuring the molten steel depth in the continuous casting tundish, belonging to the technical field of molten steel depth measuring equipment for the continuous casting tundish. Background Art
[0002] In the continuous casting process of molten steel, the remaining molten steel level in the tundish needs to be measured at the end of its use to ensure that the remaining molten steel in the tundish is minimized without the steel slag entering the billet. At present, most steel mills measure the molten steel level in the tundish by manually inserting an oxygen lance into the bottom of the tundish and then measuring the length of steel stuck on the oxygen lance with a ruler. This method is direct and accurate, but it increases the labor intensity and risk factor of the workers. Some steel mills also use laser rangefinders or radar rangefinders to measure the height of the molten steel level. The disadvantages of this method are: the liquid level of molten steel is indirectly measured, which is affected by the slag, ladle covering agent and smoke in the tundish, and the measured liquid level height has a large error. Secondly, this method does not take into account the erosion of the refractory bricks in the tundish. At the end of the use of the tundish, the thickness of the refractory bricks will be reduced due to the high temperature erosion of the molten steel. The remaining molten steel in the tundish cannot be accurately judged only from the height of the molten steel liquid level, resulting in more molten steel remaining or slag entering the steel billet. Therefore, a molten steel depth measurement device and method are needed, which are required to be able to efficiently and accurately measure the remaining molten steel depth in the tundish. Summary of the invention
[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a molten steel depth measuring device and method suitable for a continuous casting tundish, which can not only reduce the labor intensity of the staff, but also improve the measurement efficiency and accuracy of the remaining molten steel depth of the tundish.
[0004] The problem described in the present invention is solved by the following technical solutions: A molten steel depth measuring device suitable for a continuous casting tundish comprises a moving part, a lifting part, a tilt adjustment part, a first long column, a bottom probing part and a liquid level detection part; the lifting part is arranged on the moving part; the tilt adjustment part is arranged on the lifting part; the first long column is arranged on the tilt adjustment part; the bottom probing part and the liquid level detection part are both arranged on the first long column.
[0005] The above-mentioned molten steel depth measuring device suitable for continuous casting tundish, the bottom detection part includes a bottom detection column, a bottoming cone, a guide plate, a cross plate, a first infrared rangefinder and a first winch; the interior of the first long column is provided with a hole along its length direction, and the opening is located at the lowest end of the first long column; the bottom detection column is inserted into the long hole at the bottom end of the first long column, and the length of the bottom detection column is consistent with the length of the inner hole of the first long column; the bottom end of the bottom detection column is provided with a threaded hole, the end face center of the bottoming cone is provided with a threaded column, and the threaded column of the bottoming cone is threadedly matched with the threaded hole at the bottom end of the bottom detection column; the top end surface of the first long column is provided with a guide hole, and the guide A guide hole is passed through the plate at the top end of the first long column; a cross plate is provided at the top end of the guide plate, and the bottom end of the guide plate is connected to the top end surface of the bottom-probing column; the first infrared rangefinder is arranged at the top end of the outer wall of the first long column through a bracket, and its infrared emitting end points to the bottom end surface of the cross plate, and the signal output end of the first infrared rangefinder is connected to the signal input end of the CPU; the first winch is arranged at the top end of the outer wall of the first long column through a bracket, a circular hole is provided at the center of the top end surface of the first long column, and the end of the first winch pull rope passes through the circular hole at the top end of the first long column and is connected to the top end of the bottom-probing column, and the signal input end of the first winch is connected to the signal output end of the CPU.
[0006] The above-mentioned molten steel depth measuring device suitable for continuous casting tundish, the liquid level detection part includes a second long column, a first long rod, a second long rod, a docking mechanism, a second infrared rangefinder and a spring; the second long column is arranged on the outer wall of the first long column, and the center line of the first long column is parallel to the center line of the second long column; two long holes are arranged inside the second long column along its length direction, and the openings of the long holes are located at the bottom end of the second long column; the first long rod and the second long rod are respectively inserted into different long holes inside the second long column; the docking mechanism is arranged at the bottom ends of the first long rod and the second long rod; the top surface of the second long column is provided with two circular holes, and the two circular holes are respectively docked with two different long holes; the second infrared rangefinder and the spring are respectively located at the top ends of the inner walls of different long holes of the second long column; the infrared emitting end of the second infrared rangefinder points to the top end of the first long rod; the bottom end of the spring is connected to the top end of the second long rod; the signal output end of the second infrared rangefinder is connected to the signal input end of the CPU.
[0007] The above-mentioned molten steel depth measuring device suitable for the continuous casting tundish, the docking mechanism includes a bottom plate, a transverse support plate, a bottom hanging plate, a U-shaped fork and a copper wire; the bottom plate is arranged between the bottom end of the first long rod and the bottom end of the second long rod; the bottom hanging plate is arranged on the bottom end surface of the bottom plate; the transverse support plate is arranged at the bottom end of the outer wall of the bottom exploration column; the U-shaped fork is arranged at the bottom end of the bottom hanging plate, and the U-shaped fork is clamped on the outer wall of the transverse support plate; a through hole is arranged on the U-shaped fork, and a circular hole is also arranged on the transverse support plate, and the through hole of the U-shaped fork corresponds to the position of the circular hole of the transverse support plate; the copper wire passes through the through hole of the U-shaped fork and the circular hole of the transverse support plate, and the copper wire is wrapped around the through hole of the U-shaped fork and the circular hole of the transverse support plate for multiple turns.
[0008] The above-mentioned molten steel depth measuring device suitable for continuous casting tundish, the tilt adjustment part includes a slider, a servo motor, a turntable, a rotary plate, an electric cylinder, a short rod and an inclinometer; a circular groove is arranged on the end face of the slider, a circle of limit strips is arranged on the inner wall of the circular groove, a circle of grooves is arranged on the circumferential outer wall of the turntable, and the limit strips on the inner wall of the circular groove are clamped in the groove of the circumferential outer wall of the turntable; a cavity is arranged inside the slider, and the servo motor is arranged in the cavity inside the slider, and the output shaft of the servo motor is connected to the center of the end face of the turntable; the rotary plate is arranged at the end face center of the turntable away from the servo motor; a first hinge is arranged on the end face of the rotary plate A seat, a second hinge seat is arranged at the top of the outer wall of the first long column; the shell of the electric cylinder is hingedly connected to the first hinge seat of the rotating plate, and the end of the electric cylinder output shaft is hingedly connected to the second hinge seat at the top of the first long column; the inclinometer is arranged at the top of the outer wall of the first long column; the number of the short rods is two, and they are respectively arranged on both sides of the end surface of the rotating plate away from the servo motor; rotating rods are axially arranged on the two short rods, and the two rotating rods are connected to the outer wall of the first long column; the signal input end of the servo motor and the electric cylinder is connected to the signal output end of the CPU; the signal output end of the inclinometer is connected to the signal input end of the CPU.
[0009] The above-mentioned molten steel depth measuring device suitable for the continuous casting tundish, the lifting part includes a vertical plate and a second winch; the end face of the vertical plate is provided with a slide rail along its length direction, and the end face of the slider away from the turntable is slidably set on the slide rail of the vertical plate; the second winch is arranged at the top end of the vertical plate, and the end of its pull rope is connected to the top end of the slider.
[0010] The above-mentioned molten steel depth measuring device suitable for the continuous casting tundish, the moving part includes a base, an extension block and a universal wheel; universal wheels are arranged at the four corners of the lower end surface of the base; the extension block is arranged on the base; the bottom end of the vertical plate is arranged on the extension block; a display screen is arranged on the base, and the signal input end of the display screen is connected to the signal output end of the CPU.
[0011] A method for measuring the depth of molten steel in a continuous casting tundish comprises the following steps: In the initial state, the slider is located at the top of the vertical plate; the bottom-probing column is located in the first long column; Step 1: Move the device to the side of the tundish, and make the bottoming cone be located directly above the molten steel; then control the second winch to drive the slider downward until the bottoming cone is close to the protective slag covering the surface of the molten steel in the tundish. After the bottoming cone is close to the protective slag, the second winch stops moving; Step 2: The verticality of the first long column can be known from the inclinometer. If the verticality of the first long column is not enough, the servo motor and the electric cylinder are started. Under the cooperation of the fine adjustment of the servo motor and the electric cylinder, the verticality of the first long column is adjusted to a normal level, thereby ensuring that the bottoming column in the first long column can descend vertically; Step 3: The first winch slowly releases the pull rope to drive the combination of the bottoming column and the bottoming cone to move downward synchronously. At the same time, since the horizontal support plate at the bottom end of the outer wall of the bottoming column is connected to the U-shaped fork through a copper wire, the downward movement of the bottoming column and the bottoming cone combination also drives the first long rod and the second long rod downward synchronously. During the downward movement, the spring at the top of the second long rod is stretched; Step 4: The melting point of the copper wire is between the temperature of the molten steel and the temperature of the protective slag, so the copper wire will not melt when it contacts the protective slag, but will be melted when it contacts the molten steel; During the process of the bottoming cone and the copper wire going down, the data of each infrared rangefinder keeps changing. The copper wire is burned off when it contacts the molten steel. At this time, the horizontal support plate is no longer connected to the U-shaped fork. At this time, under the action of the spring, the first long rod and the second long rod are pulled back. At this time, the data of the second infrared rangefinder suddenly changes from gradually increasing to gradually decreasing. The data at this sudden point, that is, the moment when the copper wire is burned off, the data of the second infrared rangefinder plus the known length of the first long rod, the known film thickness, and the known length of the bottom vertical film is the total length of the distance between the molten steel surface and the second infrared rangefinder. Step 5: The melting of the copper wire does not affect the continued operation of the second winch. At this time, the combination of the bottoming column and the bottoming cone continues to move downward; until the bottoming cone touches the bottom end of the inner wall of the tundish, at this time the data of the first infrared rangefinder no longer changes, indicating that the bottoming cone has successfully touched the bottom. When the first infrared rangefinder no longer changes, the second winch reverses to drive the bottoming column and the bottoming cone to reset, and the minimum data detected by the first infrared rangefinder corresponds to the position where the bottoming cone contacts the bottom end face of the tundish; the total length of the bottoming column, the bottoming cone and the guide plate is known, and the total length of the bottoming column, the bottoming cone and the guide plate minus the minimum data detected by the first infrared rangefinder is the distance between the first infrared rangefinder and the bottom end face of the tundish; since the position of the first infrared rangefinder is fixed to the position of the second infrared rangefinder, the distances of the two infrared rangefinders are consistent, and combined with the known distance between the molten steel and the second infrared rangefinder, the distance between the bottom end of the molten steel and the first infrared rangefinder is known, the distance between the bottom end of the molten steel and the liquid surface can be known by conversion, and the depth of the molten steel is also known, and the data of the molten steel depth is displayed on the display screen; Step 5: After the second winch pulls back the bottom probe column, the first winch moves to pull up the slider, and then removes the device. At this time, the molten steel depth measurement operation of the tundish is completed; before preparing for the next molten steel depth measurement operation, you only need to re-pass the new copper wire through the perforation of the U-shaped fork and the circular hole of the cross support plate and wrap it several times.
[0012] The present invention moves the remaining parts to the side of the tundish for measuring operations through the moving part; the bottom-probing part and the liquid level detection part can be close to the tundish protective slag through the lifting part, so as to facilitate subsequent operations; the axis of the bottom-probing column is adjusted through the tilt adjustment part to ensure that the bottom-probing column is vertically inserted into the molten steel, which ensures that the measured data is an accurate depth and reduces the error as much as possible; the relative position of the bottom end surface of the tundish is detected by the bottom-probing part, and the liquid level detection part locates the relative position of the liquid level of the molten steel, and the distance between the bottom end of the molten steel and the liquid level can be obtained through conversion, thereby knowing the depth of the molten steel. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of a partially enlarged structure of A of the present invention; Figure 3 It is a schematic diagram of the partially enlarged structure of B of the present invention.
[0014] The list of numbers in the figure is: 1. First long column, 2. Bottom-probing column, 3. Bottom-touching cone, 4. Guide plate, 5. Horizontal plate, 6. First infrared rangefinder, 7. First winch, 8. Second long column, 9. First long rod, 10. Second long rod, 11. Film, 12. Horizontal support plate, 13. Bottom vertical plate, 14. U-shaped fork, 15. Copper wire, 16. Slider, 17. Turntable, 18. Rotary plate, 19. Electric cylinder, 20. Short rod, 21. Inclinometer, 22. Vertical plate, 23. Second winch, 24. Base. DETAILED DESCRIPTION
[0015] See also Figure 1 , 2 and Figure 3The present invention comprises a moving part, a lifting part, an inclination adjustment part, a first long column 1, a bottoming part and a liquid level detection part; the lifting part is arranged on the moving part; the moving part can drive the other parts to move to the side of the tundish; the lifting part can drive the bottoming part and the liquid level detection part to approach the protective slag; the inclination adjustment part is arranged on the lifting part; it is used to adjust the verticality of the first long column 1 to ensure that the combination of the bottoming column 2 and the bottoming cone 3 can descend vertically when descending, so as to avoid the influence of its inclination on the measurement accuracy; the first long column 1 is arranged on the inclination adjustment part; the bottoming part and the liquid level detection part are both arranged on the first long column 1; the bottoming part can measure the relative position of the bottom end face of the tundish, and the liquid level detection part can measure the relative position of the liquid steel surface, and the depth of the liquid steel in the tundish can be known by calculation.
[0016] The bottom-detecting part includes a bottom-detecting column 2, a bottom-touching cone 3, a guide plate 4, a cross plate 5, a first infrared rangefinder 6 and a first winch 7; the first long column 1 is provided with a hole along its length, and the opening is located at the lowest end of the first long column 1; the bottom-detecting column 2 is inserted into the long hole at the bottom end of the first long column 1, and the length of the bottom-detecting column 2 is consistent with the length of the inner hole of the first long column 1; the bottom-detecting column 2 can be received in the inner hole of the first long column 1, and the inner hole of the first long column 1 is the vertical displacement of the bottom-detecting column 2. The bottoming cone 3 is provided with a threaded hole at the bottom end thereof, and a threaded column is provided at the center of the end face of the bottoming cone 3, and the threaded column of the bottoming cone 3 is threadedly matched with the threaded hole at the bottom end of the bottoming column 2; the bottoming cone 3 will be worn due to the corrosion of the molten steel and the contact with the bottom end face of the tundish, and the threaded connection between the bottoming cone 3 and the bottoming column 2 enables the replacement of the bottoming cone 3 to be completed quickly, so that the staff can quickly replace the bottoming cone 3 with more serious wear; the top face of the first long column 1 is provided with a guide hole , and the guide plate 4 is penetrated by a guide hole at the top end of the first long column 1; a cross plate 5 is arranged at the top end of the guide plate 4, and the bottom end of the guide plate 4 is connected to the top end surface of the bottoming column 2; the first infrared rangefinder 6 is arranged at the top end of the outer wall of the first long column 1 through a bracket, and its infrared emitting end points to the bottom end surface of the cross plate 5, and the signal output end of the first infrared rangefinder 6 is connected to the signal input end of the CPU; since the total length of the bottoming column 2, the guide plate 4 and the bottoming cone 3 is known, when the bottoming cone 3 contacts the bottom of the middle package, the total length minus the data of the first infrared rangefinder 6 is the real vertical distance between the first infrared rangefinder 6 and the bottom end of the middle package; the first winch 7 is arranged at the top end of the outer wall of the first long column 1 through a bracket, and a circular hole is arranged at the center of the top end surface of the first long column 1, and the end of the pull rope of the first winch 7 passes through the circular hole at the top end of the first long column 1 and is connected to the top end of the bottoming column 2, and the signal input end of the first winch 7 is connected to the signal output end of the CPU; the first winch 7 controls the lifting and lowering of the bottoming column 2 by retracting and releasing the pull rope.
[0017] The liquid level detection part includes a second long column 8, a first long rod 9, a second long rod 10, a docking mechanism, a second infrared rangefinder and a spring; the second long column 8 is arranged on the outer wall of the first long column 1, and the center line of the first long column 1 is parallel to the center line of the second long column 8; two long holes are arranged inside the second long column 8 along its length direction, and the openings of the long holes are located at the bottom end of the second long column 8; the first long rod 9 and the second long rod 10 are respectively inserted into different long holes inside the second long column 8; the docking mechanism is arranged at the bottom ends of the first long rod 9 and the second long rod 10; the top surface of the second long column 8 is provided with two circular holes, and the two circular holes are respectively inserted into ... The holes are connected to two different long holes respectively; the round hole is for constant pressure to ensure that the two long rods can be smoothly inserted into the long holes; the second infrared rangefinder and the spring are respectively located at the top of the inner walls of different long holes of the second long column 8; the infrared emitting end of the second infrared rangefinder points to the top of the first long rod 9; the bottom end of the spring is connected to the top of the second long rod 10; the two long rods are vertically lifted and lowered synchronously, and when the long rods go down, the spring is stretched, and the elastic potential energy is stored to be ready to pull back the long rods at any time; the second infrared rangefinder monitors the relative position of the long rods in real time, and thus knows the relative position of the copper wire 15; the signal output end of the second infrared rangefinder is connected to the signal input end of the CPU.
[0018] The docking mechanism includes a bottom plate 11, a horizontal support plate 12, a bottom hanging plate 13, a U-shaped fork 14 and a copper wire 15; the bottom plate 11 is arranged between the bottom end of the first long rod 9 and the bottom end of the second long rod 10; the bottom hanging plate 13 is arranged on the bottom end surface of the bottom plate 11; the horizontal support plate 12 is arranged at the bottom end of the outer wall of the bottom exploration column 2; the U-shaped fork 14 is arranged at the bottom end of the bottom hanging plate 13, and the U-shaped fork 14 is clamped on the outer wall of the horizontal support plate 12; the U-shaped fork 14 is provided with a perforation, and the horizontal support plate 12 is also provided with a round The hole of the U-shaped fork 14 corresponds to the circular hole of the horizontal support plate 12; the copper wire 15 passes through the hole of the U-shaped fork 14 and the circular hole of the horizontal support plate 12, and the copper wire 15 is wound around the hole of the U-shaped fork 14 and the circular hole of the horizontal support plate 12 for multiple turns; the bottom exploration column 2 drives the docking mechanism to rise and fall synchronously through the horizontal support plate 12, which also drives the long rod to rise and fall synchronously; the melting point of the copper wire 15 is between the temperature of the protective slag and the temperature of the molten steel; the copper wire 15 will not melt when it contacts the protective slag, but will melt once it contacts the molten steel.
[0019] The tilt adjustment part includes a slider 16, a servo motor, a turntable 17, a rotary plate 18, an electric cylinder 19, a short rod 20 and an inclinometer 21; A circular groove is provided on the end face of the slider 16, a circle of limit strips is provided on the inner wall of the circular groove, a circle of grooves is provided on the circumferential outer wall of the turntable 17, and the limit strips on the inner wall of the circular groove are clamped in the groove of the circumferential outer wall of the turntable 17; the turntable 17 can rotate in the circular groove of the slider 16; a cavity is provided inside the slider 16, and the servo motor is provided in the cavity inside the slider 16, and the output shaft of the servo motor is connected to the center of the end face of the turntable 17; the servo motor can drive the turntable 17 to fine-tune the rotation; the rotary plate 18 is provided at the end face center of the turntable 17 away from the servo motor; a first hinge seat is provided on the end face of the rotary plate 18, and a second hinge seat is provided on the top of the outer wall of the first long column 1; the electric cylinder The shell of 19 is hingedly connected to the first hinge seat of the rotating plate 18, and the end of the output shaft of the electric cylinder 19 is hingedly connected to the second hinge seat at the top of the first long column 1; the cooperation between the electric cylinder 19 and the servo motor can adjust the verticality of the first long column 1; the inclinometer 21 is arranged at the top of the outer wall of the first long column 1; the number of the short rods 20 is two, and they are respectively arranged on both sides of the end surface of the rotating plate 18 away from the servo motor; the two short rods 20 are axially connected with rotating rods, and the two rotating rods are connected to the outer wall of the first long column 1; the signal input end of the servo motor and the electric cylinder 19 is connected to the signal output end of the CPU; the signal output end of the inclinometer 21 is connected to the signal input end of the CPU.
[0020] The lifting part includes a vertical plate 22 and a second winch 23; the end surface of the vertical plate 22 is provided with a slide rail along its length direction, and the end surface of the slider 16 away from the turntable 17 is slidably set on the slide rail of the vertical plate 22; the second winch 23 is set at the top end of the vertical plate 22, and the end of its pull rope is connected to the top end of the slider 16; the vertical lifting of the slider 16 is controlled by the retraction and release of the pull rope of the second winch 23.
[0021] The moving part includes a base 24, an extension block and universal wheels; universal wheels are arranged at the four corners of the lower end surface of the base 24; the extension block is arranged on the base 24; the bottom end of the vertical plate 22 is arranged on the extension block; a display screen is arranged on the base 24, and the signal input end of the display screen is connected to the signal output end of the CPU.
[0022] The model of the CPU module in the present invention is 87C196KC.
[0023] The present invention comprises the following steps: In the initial state, the slider 16 is located at the top of the vertical plate 22; the bottom-probing column 2 is located inside the first long column 1; Step 1: Move the device to the side of the tundish, and make the bottoming cone 3 located directly above the molten steel; then control the second winch 23 to drive the slider 16 downward until the bottoming cone 3 is close to the protective slag covering the surface of the molten steel in the tundish. After the bottoming cone 3 is close to the protective slag, the second winch 23 stops moving; Step 2: The verticality of the first long column 1 can be known from the inclinometer 21. If the verticality of the first long column 1 is not enough, the servo motor and the electric cylinder 19 are started. Under the fine-tuning cooperation of the servo motor and the electric cylinder 19, the verticality of the first long column 1 is adjusted to a normal level, thereby ensuring that the bottom-probing column 2 in the first long column 1 can descend vertically; whether the bottom-probing column 2 is vertical or not directly affects the measurement accuracy; Step 3: The first hoist 7 slowly releases the pull rope. The slow release of the pull rope can leave enough time for the molten steel to melt the copper wire, ensuring that the copper wire can be burned off in time when it contacts the liquid surface of the molten steel; the combination of the bottoming column 2 and the bottoming cone 3 is driven to move downward synchronously. At the same time, since the horizontal support plate 12 at the bottom end of the outer wall of the bottoming column 2 is connected to the U-shaped fork 14 through the copper wire 15, the downward movement of the combination of the bottoming column 2 and the bottoming cone 3 also synchronously drives the first long rod 9 and the second long rod 10 to move downward. During the downward movement, the spring at the top of the second long rod 10 is stretched; Step 4: The melting point of the copper wire 15 is between the temperature of the molten steel and the temperature of the protective slag, so the copper wire 15 will not melt when it contacts the protective slag, but will be melted when it contacts the molten steel; During the process of the bottoming cone 3 and the copper wire 15 going down, the data of each infrared rangefinder keeps changing. The copper wire 15 is burned off when it contacts the molten steel. At this time, the horizontal support plate 12 is no longer connected to the U-shaped fork 14. At this time, under the action of the spring, the first long rod 9 and the second long rod 10 are pulled back. At this time, the data of the second infrared rangefinder suddenly changes from gradually increasing to gradually decreasing. The data at this sudden point, that is, the moment when the copper wire 15 is burned off, the data of the second infrared rangefinder plus the known length of the first long rod 9, the known thickness of the bottom film 11, and the known length of the bottom hanging piece 13 is the total length of the distance between the molten steel surface and the second infrared rangefinder. Step 5: The melting of the copper wire 15 does not affect the continued operation of the second winch 23. At this time, the combination of the bottoming column 2 and the bottoming cone 3 continues to descend; until the bottoming cone 3 contacts the bottom end of the inner wall of the middle package, at this time the data of the first infrared rangefinder 6 no longer changes, indicating that the bottoming cone 3 has successfully touched the bottom. When the first infrared rangefinder 6 no longer changes, the second winch 23 reverses to drive the bottoming column 2 and the bottoming cone 3 to reset. The minimum data detected by the first infrared rangefinder 6 corresponds to the position where the bottoming cone 3 contacts the bottom end surface of the middle package; the total length of the bottoming column 2, the bottoming cone 3 and the guide plate 4 has It is known that the total length of the bottom-probing column 2, the bottom-touching cone 3 and the guide plate 4 minus the minimum data detected by the first infrared rangefinder 6 is the distance between the first infrared rangefinder 6 and the bottom end surface of the tundish; since the position of the first infrared rangefinder 6 is fixed to the position of the second infrared rangefinder, the distances of the two infrared rangefinders are consistent, and combined with the known distance between the molten steel and the second infrared rangefinder, the known distance between the bottom of the molten steel and the first infrared rangefinder 6, the distance between the bottom of the molten steel and the liquid surface can be known by conversion, and the depth of the molten steel is also known, and the data of the depth of the molten steel is displayed on the display screen; Step six: After the second winch 23 pulls back the bottom detection column 2, the first winch 7 is actuated to pull up the slider 16, and then the device is removed. At this time, the molten steel depth measurement operation of the tundish is completed; before preparing for the next molten steel depth measurement operation, it is only necessary to re-pass the new copper wire 15 through the perforation of the U-shaped fork 14 and the circular hole of the cross support plate 12 and wrap it several times.
Claims
1. A molten steel depth measuring device suitable for continuous casting tundish, characterized in that: The invention comprises a moving part, a lifting part, a tilt adjustment part, a first long column (1), a bottom detection part and a liquid level detection part; the lifting part is arranged on the moving part; the tilt adjustment part is arranged on the lifting part; the first long column (1) is arranged on the tilt adjustment part; the bottom detection part and the liquid level detection part are both arranged on the first long column (1).
2. The molten steel depth measuring device suitable for continuous casting tundish according to claim 1, characterized in that: The bottom-detecting part comprises a bottom-detecting column (2), a bottom-touching cone (3), a guide plate (4), a cross plate (5), a first infrared rangefinder (6) and a first winch (7); the first long column (1) is provided with a hole inside along its length direction, and the opening is located at the lowest end of the first long column (1); the bottom-detecting column (2) is inserted into the long hole at the bottom end of the first long column (1), and the length of the bottom-detecting column (2) is consistent with the length of the inner hole of the first long column (1); the bottom end of the bottom-detecting column (2) is provided with a threaded hole, the end face center of the bottom-touching cone (3) is provided with a threaded column, and the threaded column of the bottom-touching cone (3) is threadedly matched with the threaded hole at the bottom end of the bottom-detecting column (2); the top end face of the first long column (1) is provided with a guide hole, and the guide plate (4) is penetrated by the first long column The guide hole at the top of the column (1); the top of the guide plate (4) is provided with a horizontal plate (5), and the bottom end of the guide plate (4) is connected to the top surface of the bottom-detecting column (2); the first infrared rangefinder (6) is arranged at the top of the outer wall of the first long column (1) through a bracket, and its infrared emitting end points to the bottom surface of the horizontal plate (5), and the signal output end of the first infrared rangefinder (6) is connected to the signal input end of the CPU; the first winch (7) is arranged at the top of the outer wall of the first long column (1) through a bracket, and a circular hole is arranged at the center of the top surface of the first long column (1), and the end of the pull rope of the first winch (7) passes through the circular hole at the top of the first long column (1) and is connected to the top of the bottom-detecting column (2), and the signal input end of the first winch (7) is connected to the signal output end of the CPU.
3. The molten steel depth measuring device suitable for continuous casting tundish according to claim 2, characterized in that: The liquid level detection part comprises a second long column (8), a first long rod (9), a second long rod (10), a docking mechanism, a second infrared rangefinder and a spring; the second long column (8) is arranged on the outer wall of the first long column (1), and the center line of the first long column (1) is parallel to the center line of the second long column (8); two long holes are arranged inside the second long column (8) along its length direction, and the openings of the long holes are located at the bottom end of the second long column (8); the first long rod (9) and the second long rod (10) are respectively inserted into the second long column (8) The second long column (8) is provided with two circular holes on its top end, and the two circular holes are respectively connected to the two different long holes; the second infrared rangefinder and the spring are respectively located at the top ends of the inner walls of the different long holes of the second long column (8); the infrared emitting end of the second infrared rangefinder points to the top end of the first long column (9); the bottom end of the spring is connected to the top end of the second long column (10); and the signal output end of the second infrared rangefinder is connected to the signal input end of the CPU.
4. The molten steel depth measuring device suitable for continuous casting tundish according to claim 3 is characterized in that: The docking mechanism comprises a bottom plate (11), a transverse support plate (12), a bottom hanging plate (13), a U-shaped fork (14) and a copper wire (15); the bottom plate (11) is arranged between the bottom end of the first long rod (9) and the bottom end of the second long rod (10); the bottom hanging plate (13) is arranged on the bottom end surface of the bottom plate (11); the transverse support plate (12) is arranged at the bottom end of the outer wall of the bottom exploration column (2); the U-shaped fork (14) is arranged at the bottom of the bottom hanging plate (13). The U-shaped fork (14) is clamped on the outer wall of the horizontal support plate (12); the U-shaped fork (14) is provided with a through hole, and the horizontal support plate (12) is also provided with a round hole, and the position of the through hole of the U-shaped fork (14) corresponds to the position of the round hole of the horizontal support plate (12); the copper wire (15) passes through the through hole of the U-shaped fork (14) and the round hole of the horizontal support plate (12), and the copper wire (15) is wound around the through hole of the U-shaped fork (14) and the round hole of the horizontal support plate (12) for multiple turns.
5. The molten steel depth measuring device suitable for continuous casting tundish according to claim 4, characterized in that: The tilt adjustment part comprises a slider (16), a servo motor, a turntable (17), a rotary plate (18), an electric cylinder (19), a short rod (20) and an inclinometer (21); a circular groove is arranged on the end surface of the slider (16), a circle of limit strips is arranged on the inner wall of the circular groove, a circle of grooves is arranged on the circumferential outer wall of the turntable (17), and the limit strips on the inner wall of the circular groove are clamped in the groove of the circumferential outer wall of the turntable (17); a cavity is arranged inside the slider (16), and the servo motor is arranged in the cavity inside the slider (16), and the output shaft of the servo motor is connected to the center of the end surface of the turntable (17); the rotary plate (18) is arranged at the end surface center of the turntable (17) away from the servo motor; a first hinge seat is arranged on the end surface of the rotary plate (18), and the first hinge seat is arranged on the end surface of the turntable (17). A second hinge seat is provided at the top of the outer wall of the long column (1); the shell of the electric cylinder (19) is hingedly connected to the first hinge seat of the rotary plate (18), and the end of the output shaft of the electric cylinder (19) is hingedly connected to the second hinge seat at the top of the first long column (1); the inclinometer (21) is arranged at the top of the outer wall of the first long column (1); the number of the short rods (20) is two, and they are respectively arranged on both sides of the end surface of the rotary plate (18) away from the servo motor; the two short rods (20) are both axially connected with a rotating rod, and the two rotating rods are connected to the outer wall of the first long column (1); the signal input end of the servo motor and the electric cylinder (19) is connected to the signal output end of the CPU; the signal output end of the inclinometer (21) is connected to the signal input end of the CPU.
6. The molten steel depth measuring device suitable for continuous casting tundish according to claim 5, characterized in that: The lifting part comprises a vertical plate (22) and a second hoist (23); a slide rail is arranged on the end surface of the vertical plate (22) along its length direction, and the end surface of the slider (16) away from the turntable (17) is slidably arranged on the slide rail of the vertical plate (22); the second hoist (23) is arranged at the top end of the vertical plate (22), and the end of the pull rope of the second hoist (23) is connected to the top end of the slider (16).
7. The molten steel depth measuring device suitable for continuous casting tundish according to claim 6, characterized in that: The movable part comprises a base (24), an extension block and universal wheels; universal wheels are arranged at four corners of the lower end surface of the base (24); the extension block is arranged on the base (24); the bottom end of the vertical plate (22) is arranged on the extension block; a display screen is arranged on the base (24), and a signal input end of the display screen is connected to a signal output end of a CPU.
8. A method for measuring the depth of molten steel in a continuous casting tundish according to any one of claims 1 to 7, characterized in that: The steps include: In the initial state, the slider (16) is located at the top of the vertical plate (22); the bottom-detecting column (2) is located inside the first long column (1); Step 1: Move the device to the side of the tundish, and make the bottoming cone (3) be located directly above the molten steel; then control the second winch (23) to drive the slider (16) downward until the bottoming cone (3) is close to the protective slag covering the surface of the molten steel in the tundish, and after the bottoming cone (3) is close to the protective slag, the second winch (23) stops moving; Step 2: The verticality of the first long column (1) can be obtained from the inclinometer (21). If the verticality of the first long column (1) is not enough, the servo motor and the electric cylinder (19) are started. Under the cooperation of the fine adjustment of the servo motor and the electric cylinder (19), the verticality of the first long column (1) is adjusted to a normal level, thereby ensuring that the bottom-finding column (2) in the first long column (1) can descend vertically; Step 3: The first winch (7) slowly releases the pull rope, driving the combination of the bottoming column (2) and the bottoming cone (3) to move downward synchronously. At the same time, since the horizontal support plate (12) at the bottom end of the outer wall of the bottoming column (2) is connected to the U-shaped fork (14) through the copper wire (15), the downward movement of the combination of the bottoming column (2) and the bottoming cone (3) also drives the first long rod (9) and the second long rod (10) to move downward synchronously. During the downward movement, the spring at the top end of the second long rod (10) is stretched; Step 4: The melting point of the copper wire (15) is between the temperature of the molten steel and the temperature of the protective slag, so the copper wire (15) will not melt when it contacts the protective slag, but will be melted when it contacts the molten steel; During the downward movement of the bottoming cone (3) and the copper wire (15), the data of each infrared rangefinder changes continuously. The copper wire (15) burns off when it contacts the molten steel. At this time, the horizontal support plate (12) and the U-shaped fork (14) are no longer connected. At this time, under the action of the spring, the first long rod (9) and the second long rod (10) are pulled back. At this time, the data of the second infrared rangefinder changes suddenly, from gradually increasing to gradually decreasing. The data at this sudden change point, that is, the moment when the copper wire (15) burns off, the total length of the data of the second infrared rangefinder plus the known length of the first long rod (9), the known thickness of the bottom plate (11), and the known length of the bottom hanging plate (13) is the distance between the molten steel surface and the second infrared rangefinder. Step 5: The melting of the copper wire (15) does not affect the continued operation of the second winch (23). At this time, the combination of the bottoming column (2) and the bottoming cone (3) continues to move downward until the bottoming cone (3) contacts the bottom end of the inner wall of the tundish. At this time, the data of the first infrared rangefinder (6) no longer changes, indicating that the bottoming cone (3) has successfully touched the bottom. When the first infrared rangefinder (6) no longer changes, the second winch (23) reverses to drive the bottoming column (2) and the bottoming cone (3) to reset. The minimum data detected by the first infrared rangefinder (6) corresponds to the position where the bottoming cone (3) contacts the bottom end surface of the tundish. The bottoming column (2) and the bottoming cone (3) and the guide The total length of the plate (4) is known, and the total length of the bottom-probing column (2), the bottom-touching cone (3) and the guide plate (4) minus the minimum data detected by the first infrared rangefinder (6) is the distance between the first infrared rangefinder (6) and the bottom end surface of the tundish; since the position of the first infrared rangefinder (6) is fixed to the position of the second infrared rangefinder, the distances of the two infrared rangefinders are consistent, and combined with the known distance between the molten steel and the second infrared rangefinder, the distance between the bottom of the molten steel and the first infrared rangefinder (6) is known, and the distance between the bottom of the molten steel and the liquid surface can be obtained by conversion, and the depth of the molten steel is also known, and the data of the depth of the molten steel is displayed on the display screen; Step 6: After the second hoist (23) pulls back the bottom-finishing column (2), the first hoist (7) is actuated to pull up the slider (16), and then the device is removed. At this time, the tundish molten steel depth measurement operation is completed; before preparing for the next molten steel depth measurement operation, it is only necessary to re-pass the new copper wire (15) through the perforation of the U-shaped fork (14) and the circular hole of the horizontal support plate (12) and wrap it multiple times.