Device and method for automatically judging and adjusting centering degree of KR stirrer

Abstract

The invention discloses a device and method for automatically judging and adjusting the centering degree of a KR stirrer, the device comprises a rotating system, a driving system, a laser ranging system and a system control center, a stirring head is hung below the rotating system through a stirring column, and the rotating system is used for driving the stirring head to rotate; the driving system is connected with the rotating system and used for driving the rotating system to move in multiple different directions in the circumferential direction. The signal output ends of the laser ranging systems are connected with the system control center, the laser ranging systems are arranged on the periphery of a stirring column above the molten iron tank at equal intervals with the center of the molten iron tank as a circle point, and the laser ranging systems are used for measuring the distance between the stirring column and the laser ranging systems; the system control center is in control connection with the rotating system and the driving system. By integrating the rotating system, the driving system, the laser ranging system and the system control center, automatic judgment and adjustment of the centering degree of the KR stirrer are achieved, manual intervention is reduced through the highly-automatic design, and the working efficiency and accuracy are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of agitators, and in particular relates to a device and method for automatically determining and adjusting the centering degree of a KR agitator. Background Art

[0002] Hot metal pretreatment is a key process for smelting ultra-low sulfur steel for oil and gas pipelines, new energy vehicle motors, marine engineering, etc. Among them, the KR desulfurization process has become the preferred process for hot metal pretreatment due to its excellent reaction kinetics and deep desulfurization stability. It is also one of the key technologies in the country's "Three-Year Action Plan to Enhance the Core Competitiveness of Manufacturing".

[0003] The hot metal KR desulfurization process is to achieve the entrainment, mixing and dispersion of the self-floating particle desulfurizer in the hot metal by rotating the agitator immersed in the hot metal, and achieve the purpose of rapid desulfurization of the hot metal through the interfacial desulfurization reaction of a large amount of desulfurizer in the hot metal. It can be seen that the rotating stirring of the agitator is the only power source for the stirring and mixing of the hot metal KR, and it is also the core key to determining the KR stirring and mixing characteristics and the mixing and dispersion state of the desulfurizer in the hot metal.

[0004] In the actual KR desulfurization stirring process, due to the lack of judgment on the agitator's centering, the agitator may not be centered with the molten iron ladle below, which will cause a large change in the desulfurization stirring flow field, thereby affecting the desulfurization efficiency and desulfurization cost. Therefore, the agitator's centering must be monitored online and adjusted in time to ensure the desulfurization effect of molten iron.

[0005] In order to understand the technical status of KR agitator alignment determination and adjustment, a search was conducted on related technologies. Through the search, a total of 4 patents related to KR agitators were found, as follows:

[0006] Yingkou Dongbang Metallurgical Equipment Refractory Co., Ltd. has developed an S-type molten iron desulfurization agitator (Chen Shucun, Chen Xuexin, Yu Linhui, Chen Xingyao. S-type molten iron desulfurization agitator. China, invention patent, CN201210548845.5.2012.12.18.), which includes a flange connector, a stirring shaft fixedly connected to the flange connector, a stirring blade fixedly connected to the lower part of the stirring shaft, and a refractory material layer provided on the stirring shaft and the stirring blade; the stirring blade is S-shaped; a powder nozzle is provided at the bottom of the stirring blade; the inlet of the powder nozzle is connected to the powder channel of the stirring shaft. The present invention has a simple structure, low cost, long service life and ideal desulfurization effect. The present invention saves a large amount of raw materials through the S-shaped design of the stirring blade, and the desulfurization effect of molten iron is significantly improved. In addition, the present invention sprays desulfurizer to the powder nozzle through the powder channel of the stirring shaft, thereby achieving high-efficiency desulfurization of molten iron, but the patent cannot judge and adjust the centering of the agitator;

[0007] Ningxia Tianzong Hongguang Waste Heat Power Generation Technology Co., Ltd. discloses a refractory castable for hot metal desulfurization agitator (Mu Xiang, Wang Xilai, Dong Weisheng. Refractory castable for hot metal desulfurization agitator. China, invention patent, CN201410527196.X.2015.01.28.), which includes the following components by weight: 30-35 parts of silica, 20-25 parts of silicon carbide, 30-40 parts of magnesia fine powder, 40-45 parts of alumina micropowder, 20-25 parts of ferroaluminum spinel, wherein silica, ferroaluminum spinel, and silicon carbide are aggregates, and magnesia fine powder and alumina micropowder are powders. This patent is mainly for the research and development of refractory materials, and cannot self-determine the centering condition of the agitator during use;

[0008] Wuhan University of Science and Technology has disclosed a KR desulfurization agitator blade internal strain measurement device (Xu Jie, Dan Binbin, Wang Qilun. KR desulfurization agitator blade internal strain measurement device. China, invention patent, CN201210203022.9.2012.10.03.), which mainly includes: a base sheet, a strain sensor and a signal processor; the base sheet is fixed to the strain measurement position of the stirring blade; the strain sensor is fixed between the base sheet and the stirring blade to detect the strain value of the stirring blade; the signal processor is fixed to the shaft of the stirring shaft; the signal processor is electrically connected to the strain sensor to receive the strain value. The KR desulfurization agitator blade internal strain measurement device can accurately measure the strain of the stirring blade, and can optimize the structure and material of the agitator based on the measured strain information, so that the stirring is more effective and the service life is longer, but the patent cannot self-determine the centering condition of the agitator during use;

[0009] Beijing Lier High Temperature Materials Co., Ltd. discloses a method for preparing an environmentally friendly online repair material for agitators (Zhang Xiaobo, Zhao Ran, Liu Li, Wan Xiaobao, Zhang Sheng, etc. A method for preparing an environmentally friendly online repair material for agitators. China, invention patent, CN201710844029.1.2018.02.13.), which is used to solve the problem of high discard rate and inability to reuse agitator refractory materials in the prior art. A method for preparing an environmentally friendly online repair material for agitators, wherein the recycled waste agitator refractory materials are sorted, crushed, hydrated, screened, batched, and wet mixed to obtain KR agitator repair material. The present invention has the characteristics of making full use of waste refractory materials, advanced technology, and easy repair. It can make waste refractory materials be reused, reduce product costs, save raw material resources, and reduce the impact of waste refractory materials on the environment. However, the patent cannot judge and adjust the centering of the agitator.

[0010] In summary, in the publicly available literature reviewed, no device or related control technology capable of self-diagnosing and adjusting the centering degree of a KR agitator was found. Summary of the invention

[0011] In view of the deficiencies in the prior art, the object of the present invention is to provide a device and method for automatically determining and adjusting the centering degree of a KR agitator. The present invention realizes automatic determination and adjustment of the centering degree of a KR agitator by integrating a rotation system, a drive system, a laser ranging system and a system control center. This highly automated design reduces manual intervention and improves work efficiency and accuracy.

[0012] To achieve the above object, the present invention is implemented by the following technical solutions:

[0013] On the one hand, the present invention provides a device for automatically determining and adjusting the centering degree of a KR agitator, the device comprising a rotation system, a drive system, a laser ranging system and a system control center, a stirring head is suspended below the rotation system through a stirring column, and is used to drive the stirring head to rotate; the drive system is connected to the rotation system, and is used to drive the rotation system to move in multiple different circumferential directions; the signal output end of the laser ranging system is connected to the system control center, the laser ranging system takes the center of the molten iron ladle as a circle, and is equidistantly arranged around the stirring column above the molten iron ladle, and the laser ranging system is used to measure the distance between the stirring column and the laser ranging system; the system control center is respectively controlled and connected to the rotation system and the drive system.

[0014] As a further optimization scheme of the present invention, the driving system includes a first telescopic mechanism, a second telescopic mechanism and a sliding mechanism, the sliding mechanism includes two relatively arranged L-shaped slides, and a sliding frame installed between the two L-shaped slides and slidably connected thereto; the first telescopic mechanism is connected to the sliding frame, and is used to drive the sliding frame to slide along the length direction of the L-shaped slide; the second telescopic mechanism is connected to the outer wall of the L-shaped slide, and is used to drive the L-shaped slide to move along its width direction.

[0015] As a further optimization scheme of the present invention, the first telescopic mechanism includes two first drive motors located on the front and rear sides of the sliding frame, and each of the first drive motors is connected to the sliding frame through a telescopic rod; the second telescopic mechanism includes two second drive motors located on the left and right sides of the L-shaped slide, and each of the second drive motors is connected to a corresponding L-shaped slide through a telescopic rod.

[0016] As a further optimization scheme of the present invention, the rotating system includes a rotating motor and an output shaft, the rotating motor is installed on the sliding frame of the driving system through a connecting plate, one end of the output shaft is drivingly connected to the rotating motor, the other end of the output shaft is fixedly connected to a connecting column, and the other end of the connecting column is fixedly connected to the stirring column.

[0017] As a further optimization scheme of the present invention, the sliding frame is a T-shaped structure, with a boss in the middle and lower part of the sliding frame, a graphite ring tightly fitted on the connecting column is installed in the middle of the boss, a bearing fitted on the connecting column is installed below the boss, an end cover for fixing the bearing is installed at the bottom of the sliding frame, and a sealing ring tightly fitted on the connecting column is installed in the middle of the end cover.

[0018] As a further optimization scheme of the present invention, the bearing consists of a bearing outer ring and a bearing inner ring, the bearing inner ring is tightly fitted on the connecting column, and the outer wall of the bearing outer ring is in close contact with the inner wall of the sliding frame; the inner side of the end cover is pressed and fixed by a gasket.

[0019] As a further optimization scheme of the present invention, the laser ranging system includes two layers of laser rangefinders arranged correspondingly up and down, and each layer of laser rangefinders includes two laser rangefinders arranged along the moving direction of the L-shaped slide and two laser rangefinders arranged along the sliding direction of the sliding frame.

[0020] In another aspect, the present invention provides a method for automatically determining and adjusting the centering degree of a KR agitator, comprising the following steps:

[0021] S1. After the molten iron ladle is opened to the desulfurization position, start the laser rangefinder to measure the distance to the stirring column and compare the measured value with the standard distance value L;

[0022] S2. Determine the centering degree of the stirring head according to the comparison result, and control the corresponding driving system to automatically adjust the stirring head in the corresponding direction until the stirring head is completely centered;

[0023] S3. After the stirring head is aligned, the system controls the laser rangefinder to lose power, then starts the rotary motor and drives the stirring head to rotate to desulfurize the molten iron.

[0024] As a further optimization scheme of the present invention, in step S1, the measurement values ​​of the upper laser rangefinder along the clockwise direction are recorded as x1, x2, x3, and x4, and the corresponding measurement values ​​of the lower laser rangefinder are recorded as y1, y2, y3, and y4. n ≥(L+a), record the value of n and go to step S2, otherwise go to step S3; where a is the allowable error value, the value range is 1-10mm, and the value range of n is an integer value of 1-4.

[0025] As a further optimization scheme of the present invention, in step S2:

[0026] When n=1, if (2L+2a+d)≥(x1+x3)≥(2L-2a+d), d is the diameter of the stirring column, the system alarms and reminds that "the stirring head is offset to the side where the laser rangefinder corresponding to x3 is located", and the system controls the drive system to drive the L-shaped slide, the sliding frame and the stirring head to move to the side where the laser rangefinder corresponding to x1 is located until x1<(L+a), and then enters step S3; if (x1+x3)>(2L+2a+d) and (y1 +y3)>(2L+2a+d), the system alarm reminds "the laser rangefinder positions corresponding to x1, x3, y1, y3 have large deviations, please confirm manually", after manual confirmation, enter step S3; if (x1+x3)>(2L+2a+d) and (y1+y3)<(2L+2a+d), the system alarm reminds "the laser rangefinder positions corresponding to x1 and x3 have large deviations, please confirm manually", after manual confirmation, enter step S3;

[0027] When n=2, if (2L+2a+d)≥(x2+x4)≥(2L-2a+d), the system alarm reminds that "the mixing head is offset to the side where the laser rangefinder corresponding to x4 is located", and the system controls the driving system to drive the sliding frame and the mixing head to move in the L-shaped slideway to the side where the laser rangefinder corresponding to x2 is located until x2<(L+a), and then enters step S3; if (x2+x4)>(2L+2a+d) and (y2+y4)>(2L+2a+d), the system alarm reminds that "the positions of the laser rangefinders corresponding to x2, x4, y2, and y4 have large deviations, please confirm manually", and after manual confirmation, enter step S3; if (x2+x4)>(2L+2a+d) and (y2+y4)<(2L+2a+d), the system alarm reminds that "the positions of the laser rangefinders corresponding to x2 and x4 have large deviations, please confirm manually", and after manual confirmation, enter step S3;

[0028] When n=3, if (2L+2a+d)≥(x3+x1)≥(2L-2a+d), the system alarm reminds that "the mixing head is offset to the side where the laser rangefinder corresponding to x1 is located", and the system controls the drive system to drive the L-shaped slide, the sliding frame and the mixing head to move to the side where the laser rangefinder corresponding to x3 is located until x3<(L+a), and then enters step S3; if (x3+x1)>(2L+2a+d) and (y3+y1)>(2L+2a+d), the system alarm reminds that "the positions of the laser rangefinders corresponding to x1, x3, y1, and y3 have large deviations, please confirm manually", and after manual confirmation, enter step S3; if (x3+x1)>(2L+2a+d) and (y3+y1)<(2L+2a+d), the system alarm reminds that "the positions of the laser rangefinders corresponding to x1 and x3 have large deviations, please confirm manually", and after manual confirmation, enter step S3;

[0029] When n=4, if (2L+2a+d)≥(x4+x2)≥(2L-2a+d), the system alarm reminds that "the mixing head is offset to the side where the laser rangefinder corresponding to x2 is located", and the system controls the driving system to drive the sliding frame and the mixing head to move in the L-shaped slideway to the side where the laser rangefinder corresponding to x4 is located until x4<(L+a), and then enters step S3; if (x4+x2)>(2L+2a+d) and (y4+y2)>(2L+2a+d), the system alarm reminds that "the positions of the laser rangefinders corresponding to x2, x4, y2, and y4 have large deviations, please confirm manually", and after manual confirmation, enter step S3; if (x4+x2)>(2L+2a+d) and (y4+y2)<(2L+2a+d), the system alarm reminds that "the positions of the laser rangefinders corresponding to x2 and x4 have large deviations, please confirm manually", and after manual confirmation, enter step S3.

[0030] Compared with the prior art, the present invention has the following significant advantages and beneficial effects:

[0031] (1) The present invention realizes the automatic determination and adjustment of the centering degree of the KR agitator by integrating the rotation system, the drive system, the laser ranging system and the system control center. This highly automated design reduces manual intervention and improves work efficiency and accuracy. The system control center can receive data from the laser ranging system in real time and perform rapid analysis to automatically determine the centering degree of the agitator head and control the drive system to make corresponding adjustments. This intelligent operation method reduces the difficulty of operation and improves the overall performance of the system.

[0032] (2) The laser distance measurement system is arranged equidistantly around the stirring column with the center of the molten iron ladle as the dot, and can measure the distance between the stirring column and the laser distance measurement system in an all-round and accurate manner. This arrangement improves the accuracy of the measurement and provides reliable data support for the determination and adjustment of the centering degree. The drive system includes a first telescopic mechanism and a second telescopic mechanism, which can respectively drive the sliding frame to slide along the length direction of the L-shaped slideway and the L-shaped slideway to move along its width direction, thereby realizing precise adjustment of the stirring head in multiple directions.

[0033] (3) The sliding frame adopts a T-shaped structure and is tightly connected to the connecting column through components such as bosses, graphite ferrules, bearings and end covers. This structural design improves the stability of the system and reduces vibration and noise. The introduction of the bearing not only ensures the rotation flexibility of the connecting column, but also improves the rigidity of the entire connecting column, further reducing the possibility of position deviation of the stirring head. At the same time, the use of graphite ferrules and sealing rings effectively ensures the sealing of the bearing and extends the service life of the bearing.

[0034] (4) During the alignment determination and adjustment process, the system can monitor the measurement values ​​of the laser rangefinder in real time and judge the alignment of the mixing head and the position deviation of the laser rangefinder based on the changes in the measurement values. Once an abnormality is detected, the system will immediately sound an alarm and give corresponding treatment suggestions, thus avoiding production interruptions and safety accidents caused by faults.

[0035] (5) The device and method of the present invention are applicable to hot metal desulfurization processes of different scales and types and have strong adaptability. By adjusting the arrangement of the laser ranging system, it can easily adapt to hot metal ladle and agitator of different sizes.

[0036] (6) Through automated centering determination and adjustment, the present invention significantly shortens the preparation time of the hot metal desulfurization process and improves production efficiency. At the same time, precise centering adjustment also ensures the consistency and stability of the desulfurization effect and improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a top view of the device of the present invention;

[0038] Figure 2 is an AA cross-sectional view of the device of the present invention;

[0039] Figure 3 is a BB cross-sectional view of the device of the present invention;

[0040] Figure 4 It is a CC cross-sectional view of the device of the present invention.

[0041] The markings in the figure are as follows: 1. molten iron ladle; 2. molten iron; 3. stirring head; 4. stirring column; 5. flange; 6. connecting bolts; 7. sliding frame; 8. L-shaped slide; 9. first drive motor; 10. second drive motor; 11. telescopic rod; 12. rotating motor; 13. output shaft; 14. connecting column; 15. connecting plate; 16. boss; 17. graphite ring; 18. bearing outer ring; 19. bearing inner ring; 20. end cover; 21. gasket; 22. sealing ring; 23. laser rangefinder. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for exemplary description and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, the omission of some well-known structures and their descriptions in the drawings is understandable. The positional relationship described in the drawings is only used for exemplary description and cannot be understood as a limitation on this patent.

[0043] Example 1

[0044] The present embodiment provides a device for automatically determining and adjusting the centering degree of a KR agitator, the device comprising a rotation system, a drive system, a laser ranging system and a system control center, a stirring head 3 is suspended below the rotation system through a stirring column 4, and is used to drive the stirring head 3 to rotate; the drive system is connected to the rotation system, and is used to drive the rotation system to move in four different directions of east, west, south and north; the signal output end of the laser ranging system is connected to the system control center, the laser ranging system takes the center of the molten iron ladle 1 as a circle, and is equidistantly arranged around the stirring column 4 above the molten iron ladle 1, and the laser ranging system is used to measure the distance between the stirring column 4 and the laser ranging system; the system control center is respectively controlled and connected to the rotation system and the drive system.

[0045] like Figure 1-Figure 3 As shown, the driving system includes a first telescopic mechanism, a second telescopic mechanism and a sliding mechanism. The sliding mechanism includes two L-shaped slideways 8 arranged opposite to each other, and a sliding frame 7 installed between the two L-shaped slideways 8 and slidably connected thereto; the first telescopic mechanism is connected to the sliding frame 7 and is used to drive the sliding frame 7 to move along the length direction of the L-shaped slideway 8 (i.e. Figure 1 The second telescopic mechanism is connected to the outer wall of the L-shaped slide 8 and is used to drive the L-shaped slide 8 along its width direction (ie Figure 1 Since the two L-shaped slideways 8 are hollow in the middle and the sliding frame 7 is a T-shaped structure, the sliding frame 7 and the rotating system fixed on it can move together along the L-shaped slideway 8 in the north-south direction, and the moving distance is controlled by the first telescopic mechanism installed at both ends of the sliding frame 7. This design realizes the automatic determination and adjustment of the centering degree of the KR agitator, improves the desulfurization efficiency and accuracy, and reduces the error and cost of manual adjustment. The design provides a specific structure of the drive system, so that the rotating system (and the stirring head 3) can be flexibly moved in a two-dimensional plane, thereby realizing precise adjustment of the centering degree.

[0046] Specifically, the first telescopic mechanism includes two first drive motors 9 located on the front and rear sides of the sliding frame 7, each of which is connected to the sliding frame 7 through a telescopic rod 11, and the first drive motor 9 is installed on the L-shaped slide or foundation; the second telescopic mechanism includes two second drive motors 10 located on the left and right sides of the L-shaped slide 8, each of which is connected to a corresponding L-shaped slide 8 through a telescopic rod 11, and the second drive motor 10 is installed on the foundation. This design concretizes the implementation method of the first and second telescopic mechanisms, and realizes precise control of the drive system through the cooperation of the motor and the telescopic rod 11.

[0047] like Figure 1-Figure 3As shown, the rotating system includes a rotating motor 12 and an output shaft 13. The rotating motor 12 is mounted on the sliding frame 7 of the driving system through a connecting plate 15. One end of the output shaft 13 is drivingly connected to the rotating motor 12, and the other end of the output shaft 13 is fixedly connected to a connecting column 14. The other end of the connecting column 14 is fixedly connected to the stirring column 4. This design concretizes the structure of the rotating system, so that the stirring head 3 can rotate stably, meeting the requirements of the desulfurization process.

[0048] Specifically, the sliding frame 7 is a T-shaped structure, with a boss 16 at the middle and lower part of the sliding frame 7, a graphite ferrule 17 tightly fitted on the connecting column 14 is installed in the middle of the boss 16, and the graphite ferrule 17 can effectively ensure a good seal between the connecting column 14 and the sliding frame 7. A bearing fitted on the connecting column 14 is installed below the boss 16, an end cover 20 for fixing the bearing is installed at the bottom of the sliding frame 7, and a sealing ring 22 tightly fitted on the connecting column 14 is installed in the middle of the end cover 20. The sealing ring 22 can effectively ensure a good seal between the connecting column 14 and the end cover 20, prevent dust from entering the bearing, and effectively extend the service life of the bearing.

[0049] The agitator mainly comprises a stirring head 3, a stirring column 4 and a flange 5, wherein the stirring head 3 can be a three-blade, four-blade or five-blade structure, and is mainly used to stir the molten iron 2 in the molten iron tank 1 below so as to desulfurize the molten iron 2; the stirring column 4 is a cylindrical structure with a diameter of d, and is mainly used to connect the flange 5 and the stirring head 3 to form a whole; the flange 5 on the top of the stirring head 3 is designed with a plurality of circular holes, and the hole pattern arrangement is the same as the flange 5 connected to the bottom of the connecting column 14, and the upper and lower flanges 5 can be fixed together by connecting bolts 6; the connecting column 14 and the flange 5 connected to its bottom are an intermediate connecting mechanism, which is a whole, and a flange 5 is also designed on the top of the connecting column 14, and the flange 5 can be connected to the flange 5 connected to the bottom of the output shaft 13 by connecting bolts 6; since the rotating motor 12 body is fixed together with the connecting plate 15, the rotation of the rotating motor 12 and the output shaft 13 can drive the connecting column 14, the flange 5, the stirring column 4 and the stirring head 3 to rotate together.

[0050] Specifically, the bearing is composed of a bearing outer ring 18 and a bearing inner ring 19. The bearing inner ring 19 is tightly mounted on the connecting column 14. The outer wall of the bearing outer ring 18 is in close contact with the inner wall of the sliding frame 7. The inner side of the end cover 20 is pressed and fixed by a gasket 21. The bearing is mainly used to improve the rigidity of the connecting column 14 and ensure that the mixing head 3 does not deflect greatly during the rotation process.

[0051] like Figure 2-Figure 4As shown, the laser distance measuring system includes two layers of laser distance measuring devices 23 arranged in correspondence with each other, and each layer of laser distance measuring devices 23 includes two laser distance measuring devices 23 arranged along the moving direction of the L-shaped slideway 8 and two laser distance measuring devices 23 arranged along the sliding direction of the sliding frame 7. Specifically, eight laser distance measuring devices 23 are designed around the stirring column 4 above the molten iron ladle 1, and are divided into two groups, which are marked as 1-1, 1-2, 1-3, 1-4 and 2-1, 2-2, 2-3, 2-4 in terms of west, north, east, and south, respectively, and are used to measure the distance between the laser distance measuring device 23 and the stirring column 4, which are marked as x1, x2, x3, x4 and y1, y2, y3, y4 in terms of west, north, east, and south, respectively, and the standard distance from the outer circle of the stirring column 4 when installed is L. This design improves the measurement accuracy and reliability through the arrangement of laser distance measuring devices 23 in multiple layers and directions, and provides accurate data support for the determination and adjustment of the centering degree.

[0052] Example 2

[0053] like Figure 4 As shown, this embodiment, based on the first embodiment, proposes a method for automatically determining and adjusting the centering degree of a KR agitator, comprising the following steps:

[0054] Step 1: After the molten iron ladle is opened to the "desulfurization position", the system starts and controls 8 laser rangefinders to be powered (1-1, 1-2, 1-3, 1-4 and 2-1, 2-2, 2-3, 2-4). The measurement starts after 5 seconds, and the measured values ​​are recorded as x1, x2, x3, x4 and y1, y2, y3, y4 respectively; the system automatically compares the measured values ​​with the standard distance value L in turn. If x n ≥(L+a) (a is the allowable error value, the value range is 1-10mm, and the value range of n is an integer from 1 to 4), record the value of n, and then go to step 2 for comparison, otherwise go to step 3;

[0055] Step 2: ① When n=1, if (2L+2a+d)≥(x1+x3)≥(2L-2a+d) (a is in the range of 1-10mm, d is the diameter of the stirring column), the system alarms and reminds that "the stirring head is offset to the east", where the east side is the side where the laser rangefinder corresponding to x3 is located; the system controls the telescopic rod of the second telescopic mechanism on the east side to extend and the telescopic rod of the second telescopic mechanism on the west side to retract synchronously, and drives the L-shaped slide, the sliding frame and the stirring head to move westward together until x1<(L+a), and then enters step 3; If (x1+x3)>(2L+2a+d) and (y1+y3)>(2L+2a+d), the system will alarm and remind "The positions of laser rangefinders 1-1, 1-3 and 2-1, 2-3 have large deviations, please confirm manually", and after manual confirmation, go to step 3; if (x1+x3)>(2L+2a+d) and (y1+y3)<(2L+2a+d), the system will alarm and remind "The positions of laser rangefinders 1-1 and 1-3 have large deviations, please confirm manually", and after manual confirmation, go to step 3;

[0056] ②When n=2, if (2L+2a+d)≥(x2+x4)≥(2L-2a+d) (a is in the range of 1-10mm, d is the diameter of the stirring column), the system alarms and reminds that "the stirring head is offset to the south", where the south side is the side where the laser rangefinder corresponding to x4 is located; the system controls the telescopic rod of the first telescopic mechanism on the south side to extend and the telescopic rod of the first telescopic mechanism on the north side to retract synchronously, and drives the sliding frame and the stirring head to move northward in the L-shaped slide until x2<(L+a), then enters step 3; if If (x2+x4)>(2L+2a+d) and (y2+y4)>(2L+2a+d), the system will alarm and remind "There is a large deviation between the positions of laser rangefinders 1-2, 1-4 and 2-2, 2-4, please confirm manually", and go to step 3 after manual confirmation; if (x2+x4)>(2L+2a+d) and (y2+y4)<(2L+2a+d), the system will alarm and remind "There is a large deviation between the positions of laser rangefinders 1-2 and 1-4, please confirm manually", and go to step 3 after manual confirmation;

[0057] ③When n=3, if (2L+2a+d)≥(x3+x1)≥(2L-2a+d) (a is in the range of 1-10mm, d is the diameter of the stirring column), the system alarms and reminds that "the stirring head is offset to the west", where the west side is the side where the laser rangefinder corresponding to x1 is located; the system controls the telescopic rod of the second telescopic mechanism on the east side to retract and the telescopic rod of the second telescopic mechanism on the west side to extend synchronously, and drives the L-shaped slide, the sliding frame and the stirring head to move eastward together until x3<(L+a), then enters step 3; if If (x3+x1)>(2L+2a+d) and (y3+y1)>(2L+2a+d), the system will alarm and remind "There is a large deviation between the positions of laser rangefinders 1-1, 1-3 and 2-1, 2-3, please confirm manually", and go to step 3 after manual confirmation; if (x3+x1)>(2L+2a+d) and (y3+y1)<(2L+2a+d), the system will alarm and remind "There is a large deviation between the positions of laser rangefinders 1-1 and 1-3, please confirm manually", and go to step 3 after manual confirmation;

[0058] ④ When n=4, if (2L+2a+d)≥(x4+x2)≥(2L-2a+d) (a is in the range of 1-10mm, d is the diameter of the stirring column), the system alarms and reminds that "the stirring head is offset to the north", where the south side is the side where the laser rangefinder corresponding to x2 is located; the system controls the telescopic rod of the first telescopic mechanism on the south side to retract and the telescopic rod of the first telescopic mechanism on the north side to extend synchronously, and drives the sliding frame and the stirring head to move southward in the L-shaped slide until x4<(L+a), then enters step 3; if If (x4+x2)>(2L+2a+d) and (y4+y2)>(2L+2a+d), the system will alarm and remind "There is a large deviation between the positions of laser rangefinders 1-2, 1-4 and 2-2, 2-4, please confirm manually", and go to step 3 after manual confirmation; if (x4+x2)>(2L+2a+d) and (y4+y2)<(2L+2a+d), the system will alarm and remind "There is a large deviation between the positions of laser rangefinders 1-2 and 1-4, please confirm manually", and go to step 3 after manual confirmation;

[0059] Step 3: The system controls 8 laser rangefinders to lose power (1-1, 1-2, 1-3, 1-4 and 2-1, 2-2, 2-3, 2-4), and starts the rotating motor after 5 seconds, driving the agitator to rotate to desulfurize the molten iron.

[0060] The device and method for automatically determining and adjusting the centering degree of a KR stirrer proposed by the present invention have a simple overall system structure, low price and strong applicability; a plurality of laser rangefinders are used to realize real-time measurement of the position of a stirring column; an automatic centering determination program is developed, which can be combined with the measured data of the laser rangefinder for analysis and self-determination of the centering degree of a stirring head; the laser rangefinder adopts a double-layer arrangement, and through data comparison, it can be effectively determined whether it is the position deviation of the stirring head or the position deviation of the photometric rangefinder; through the structural design of the L-shaped slideway and the T-shaped sliding frame, and the first telescopic mechanism installed on the T-shaped sliding frame, the stirring head can be automatically adjusted in the north-south direction according to the measured data of the laser rangefinder; through the L-shaped slideway, the telescopic rod and the second telescopic mechanism, the stirring head can be automatically adjusted in the east-west direction according to the measured data of the laser rangefinder; a bearing is designed on the outer side of the connecting column, which can improve the rigidity of the entire connecting column under the condition of ensuring the rotation flexibility of the connecting column, and further reduce the position deviation of the stirring head; through the sealing ring on the graphite gasket and the end cover, the good sealing performance of the bearing can be effectively guaranteed, and the service life of the bearing is improved.

[0061] In summary, the present invention provides a more reliable, efficient and intelligent solution for molten iron desulfurization process through technical innovations and advantages in highly automated and intelligent design, precise centering adjustment, stable structure and enhanced durability, flexible adaptability, comprehensive fault detection and alarm functions, and efficient production processes.

[0062] According to the description and drawings of the present invention, a person skilled in the art can easily manufacture or use the device and method for automatically determining and adjusting the centering degree of a KR agitator of the present invention, and can produce the positive effects described in the present invention.

[0063] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0064] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A device for automatically determining and adjusting the centering degree of a KR agitator, characterized in that: The device comprises a rotation system, a drive system, a laser distance measurement system and a system control center. A stirring head (3) is suspended below the rotation system through a stirring column (4) and is used to drive the stirring head (3) to rotate. The drive system is connected to the rotation system and is used to drive the rotation system to move in a plurality of different circumferential directions. The signal output end of the laser distance measurement system is connected to the system control center. The laser distance measurement system is arranged around the stirring column (4) above the molten iron ladle (1) at equal distances with the center of the molten iron ladle (1) as a circle. The laser distance measurement system is used to measure the distance between the stirring column (4) and the laser distance measurement system. The system control center is respectively connected to the rotation system and the drive system for control.

2. The device for automatically determining and adjusting the centering degree of a KR agitator according to claim 1 is characterized in that: The driving system comprises a first telescopic mechanism, a second telescopic mechanism and a sliding mechanism; the sliding mechanism comprises two L-shaped slideways arranged opposite to each other, and a sliding frame (7) installed between the two L-shaped slideways (8) and slidably connected thereto; the first telescopic mechanism is connected to the sliding frame (7) and is used to drive the sliding frame (7) to slide along the length direction of the L-shaped slideway; the second telescopic mechanism is connected to the outer wall of the L-shaped slideway (8) and is used to drive the L-shaped slideway (8) to move along its width direction.

3. The device for automatically determining and adjusting the centering degree of a KR agitator according to claim 2 is characterized in that: The first telescopic mechanism comprises two first drive motors (9) located at the front and rear sides of the sliding frame (7), and each of the first drive motors (9) is connected to the sliding frame (7) via a telescopic rod (11); the second telescopic mechanism comprises two second drive motors (10) located at the left and right sides of the L-shaped slideway, and each of the second drive motors (10) is connected to a corresponding one of the L-shaped slideways (8) via a telescopic rod (11).

4. The device for automatically determining and adjusting the centering degree of a KR agitator according to claim 1 is characterized in that: The rotating system comprises a rotating motor (12) and an output shaft (13); the rotating motor (12) is mounted on a sliding frame (7) of the driving system via a connecting plate (15); one end of the output shaft (13) is drivingly connected to the rotating motor (12); the other end of the output shaft (13) is fixedly connected to a connecting column (14); and the other end of the connecting column (14) is fixedly connected to the stirring column (4).

5. The device for automatically determining and adjusting the centering degree of a KR agitator according to claim 4 is characterized in that: The sliding frame (7) is a T-shaped structure, and a boss (16) is provided at the middle and lower part of the sliding frame (7). A graphite ring (17) tightly fitted on the connecting column (14) is installed in the middle of the boss (16), and a bearing fitted on the connecting column (14) is installed below the boss (16). An end cover (20) for fixing the bearing is installed at the bottom of the sliding frame (7), and a sealing ring (22) tightly fitted on the connecting column (14) is installed in the middle of the end cover (20).

6. The device for automatically determining and adjusting the centering degree of a KR agitator according to claim 5 is characterized in that: The bearing is composed of a bearing outer ring (18) and a bearing inner ring (19). The bearing inner ring (19) is tightly fitted on the connecting column (14). The outer wall of the bearing outer ring (18) is in close contact with the inner wall of the sliding frame (7). The inner side of the end cover (20) is pressed and fixed with a gasket (21).

7. The device for automatically determining and adjusting the centering degree of a KR agitator according to claim 1 is characterized in that: The laser distance measuring system comprises two layers of laser distance measuring devices (23) arranged correspondingly in an upper and lower direction, and each layer of laser distance measuring devices (23) comprises two laser distance measuring devices (23) arranged along the moving direction of the L-shaped slideway and two laser distance measuring devices (23) arranged along the sliding direction of the sliding frame (7).

8. A method for automatically determining and adjusting the centering degree of a KR agitator, using the device according to any one of claims 1 to 7, characterized in that: The steps include: S1. After the molten iron ladle is opened to the desulfurization position, start the laser rangefinder to measure the distance to the stirring column and compare the measured value with the standard distance value L; S2. Determine the centering degree of the stirring head according to the comparison result, and control the corresponding driving system to automatically adjust the stirring head in the corresponding direction until the stirring head is completely centered; S3. After the stirring head is aligned, the system controls the laser rangefinder to lose power, then starts the rotary motor and drives the stirring head to rotate to desulfurize the molten iron.

9. The method for automatically determining and adjusting the centering degree of a KR agitator according to claim 8, characterized in that: In step S1, the measurement values ​​of the upper laser rangefinder in the clockwise direction are recorded as x1, x2, x3, and x4, and the corresponding measurement values ​​of the lower laser rangefinder are recorded as y1, y2, y3, and y4. n ≥(L+a), record the value of n and go to step S2, otherwise go to step S3; where a is the allowable error value, the value range is 1-10mm, and the value range of n is an integer value of 1-4.

10. The method for automatically determining and adjusting the centering degree of a KR agitator according to claim 9, characterized in that: In step S2: When n=1, if (2L+2a+d)≥(x1+x3)≥(2L-2a+d), d is the diameter of the stirring column, the system alarms and reminds that "the stirring head is offset to the side where the laser rangefinder corresponding to x3 is located", and the system controls the drive system to drive the L-shaped slide, the sliding frame and the stirring head to move to the side where the laser rangefinder corresponding to x1 is located until x1<(L+a), and then enters step S3; if (x1+x3)>(2L+2a+d) and (y1 +y3)>(2L+2a+d), the system alarm reminds "the laser rangefinder positions corresponding to x1, x3, y1, y3 have large deviations, please confirm manually", after manual confirmation, enter step S3; if (x1+x3)>(2L+2a+d) and (y1+y3)<(2L+2a+d), the system alarm reminds "the laser rangefinder positions corresponding to x1 and x3 have large deviations, please confirm manually", after manual confirmation, enter step S3; When n=2, if (2L+2a+d)≥(x2+x4)≥(2L-2a+d), the system alarms and reminds that "the mixing head deviates to the side where the laser rangefinder corresponding to x4 is located", and the system controls the driving system to drive the sliding frame and the mixing head to move in the L-shaped slideway to the side where the laser rangefinder corresponding to x2 is located until x2<(L+a), and then enters step S3; if (x2+x4)>(2L+2a+d) and (y2+y4)>(2L+2a+d), the system alarms and reminds that "the positions of the laser rangefinders corresponding to x2, x4, y2, and y4 have large deviations, please confirm manually", and after manual confirmation, enter step S3; if (x2+x4)>(2L+2a+d) and (y2+y4)<(2L+2a+d), the system alarms and reminds that "the positions of the laser rangefinders corresponding to x2 and x4 have large deviations, please confirm manually", and after manual confirmation, enter step S3; When n=3, if (2L+2a+d)≥(x3+x1)≥(2L-2a+d), the system alarms and reminds that "the mixing head deviates to the side where the laser rangefinder corresponding to x1 is located", and the system controls the drive system to drive the L-shaped slide, the sliding frame and the mixing head to move to the side where the laser rangefinder corresponding to x3 is located until x3<(L+a), and then enters step S3; if (x3+x1)>(2L+2a+d) and (y3+y1)>(2L+2a+d), the system alarms and reminds that "the positions of the laser rangefinders corresponding to x1, x3, y1, and y3 have large deviations, please confirm manually", and after manual confirmation, enter step S3; if (x3+x1)>(2L+2a+d) and (y3+y1)<(2L+2a+d), the system alarms and reminds that "the positions of the laser rangefinders corresponding to x1 and x3 have large deviations, please confirm manually", and after manual confirmation, enter step S3; When n=4, if (2L+2a+d)≥(x4+x2)≥(2L-2a+d), the system alarm reminds "the mixing head is offset to the side where the laser rangefinder corresponding to x2 is located", and the system controls the driving system to drive the sliding frame and the mixing head to move in the L-shaped slideway to the side where the laser rangefinder corresponding to x4 is located until x4<(L+a), and then enters step S3; if (x4+x2)>(2L+2a+d) and (y4+y2)>(2L+2a+d), the system alarm reminds "the positions of the laser rangefinders corresponding to x2, x4, y2, and y4 have large deviations, please confirm manually", and after manual confirmation, enter step S3; if (x4+x2)>(2L+2a+d) and (y4+y2)<(2L+2a+d), the system alarm reminds "the positions of the laser rangefinders corresponding to x2 and x4 have large deviations, please confirm manually", and after manual confirmation, enter step S3.

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