Positioning device for assisting liquid level measurement of continuous casting tundish and use method of positioning device

Abstract

The invention discloses a positioning device for assisting liquid level measurement of a continuous casting tundish. The positioning device comprises the tundish, a fixing ring, an angle adjusting ring, a positioning guide mechanism, an oxygen pipe and the like. The fixing ring is connected with the stopper lifting driving mechanism through the arc-shaped clamping plate, the angle adjusting ring can rotate around the fixing ring and achieve angle positioning through a spring piece and an arc-shaped groove, the electric push rod drives the positioning guide mechanism to move horizontally, and a driving roller and an extrusion roller in the positioning guide mechanism clamp an oxygen tube and achieve vertical feeding. When the oxygen pipe is in contact with the bowl opening of the tundish, the pressure sensor triggers the microprocessor to control the drive to stop, and accurate positioning is ensured. The problems of angle deviation and inaccurate bowl opening positioning in traditional measurement are solved, accurate measurement of the liquid level is achieved, the casting residue cost is reduced, and the method is suitable for metallurgy continuous casting production.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metallurgical continuous casting production, and particularly relates to a positioning device for assisting in measuring the liquid level of a continuous casting tundish and a use method thereof. BACKGROUND

[0002] In the process of metallurgical continuous casting production, the tundish serves as a molten steel transition container, and accurate measurement of the liquid level height of the tundish plays a key role in the control of the remaining molten steel, the prevention of slag entrapment, and the stability of production. At present, when the tundish is replaced and the remaining molten steel is poured, the tundish operator usually inserts an oxygen tube into the molten steel at the position of the tundish stopper to measure the liquid level height of the tundish. This traditional method has many limitations: first, the angle of manually inserting the oxygen tube is difficult to keep consistent, which leads to unstable measurement point position and affects the accuracy of the measurement result; second, since the bowl mouth area of the tundish submerged entry nozzle has a concave structure, the traditional measurement method cannot accurately position the center of the bowl mouth, resulting in a deviation between the actual liquid level and the measured liquid level. This deviation not only causes inaccurate control of the remaining molten steel, increases the loss of remaining molten steel and production cost, but also may affect the stability of the continuous casting process. In addition, the existing measurement means lacks effective positioning and guiding mechanisms, making it difficult to achieve automatic and accurate positioning of the oxygen tube, and the measurement process relies on manual experience, which is low in efficiency and large in error. Therefore, there is an urgent need for a positioning device for assisting in measuring the liquid level of a continuous casting tundish that can solve the above problems. SUMMARY

[0003] The application provides a positioning device for assisting in measuring the liquid level of a continuous casting tundish and a use method thereof, which combines mechanical positioning with automatic control to ensure accurate insertion of the oxygen tube into the center of the tundish bowl mouth, eliminate manual operation errors, achieve accurate measurement of the liquid level, and thus reasonably control the remaining molten steel in the tundish and reduce production cost.

[0004] The technical solution of the application to solve the technical problem is as follows:

[0005] According to one aspect of the application, a positioning device for assisting in measuring the liquid level of a continuous casting tundish is provided, which comprises a tundish, a stopper mechanism is arranged at the middle position of the upper end surface of the tundish, a stopper lifting driving mechanism is installed above the stopper mechanism, a bowl mouth is arranged at the center position of the bottom of the tundish, and further comprising:

[0006] A fixed ring is sleeved outside the stopper lifting driving mechanism;

[0007] An angle adjusting ring is connected to the outside of the fixed ring through a bearing, can freely rotate under the action of an external force and keep the position fixed when not under force;

[0008] An electric push rod has a fixed end installed on one side of the angle adjusting ring;

[0009] A positioning guide mechanism is arranged on one side of the movable end of the electric push rod, and is provided with two upper and lower positioning guide mechanisms which are fixedly connected through a connecting frame; a driving roller is arranged on one side of the positioning guide mechanism, and a pressing roller is arranged on the other side, and a positioning cavity for positioning and adjusting the oxygen pipe is formed between the two rollers, and the driving roller is connected with a driving device;

[0010] The lower end of the oxygen pipe extends into the interior of the tundish through the positioning cavity.

[0011] Preferably, the pressing roller is mounted in the positioning guide mechanism through a movable frame which is in sliding and limiting cooperation with the inner cavity of the positioning guide mechanism, and a supporting spring is arranged between the movable frame and the positioning guide mechanism, and the supporting spring is used to press the oxygen pipe by the pressing roller.

[0012] Preferably, arc-shaped clamping plates are arranged on the front and back of the inner part of the fixing ring, and rotary wheels are arranged on the front and back of the outer part of the fixing ring, one end of the rotary wheel is fixedly connected with a screw rod which is in threaded cooperation with the fixing ring, and the other end of the screw rod is connected with the arc-shaped clamping plates through a bearing.

[0013] Preferably, a plurality of arc-shaped grooves are arranged on the outer wall of the fixing ring, and a plurality of spring sheets are arranged on the inner wall of the angle adjusting ring, and the spring sheets are clamped with the arc-shaped grooves.

[0014] According to another aspect of the present application, a use method of the positioning device for auxiliary continuous casting tundish liquid level measurement is provided, and the method is characterized in that: the lower end of the oxygen pipe is inserted into the positioning cavity between the driving roller and the pressing roller of the positioning guide mechanism, then the electric push rod is turned on, the oxygen pipe on the positioning guide mechanism is moved in the horizontal direction by the movable end of the electric push rod and reaches the measurement position, the driving device is turned on to drive the driving roller to rotate in the forward direction, the oxygen pipe is slowly moved vertically downward until the bottom bowl of the tundish is touched by using the friction force between the driving roller and the outer wall of the oxygen pipe, and the insertion length of the oxygen pipe is measured.

[0015] Preferably, after the insertion length of the oxygen pipe is measured, the driving device is reversed to drive the driving roller to rotate, the oxygen pipe is slowly moved vertically upward by a distance by using the friction force between the driving roller and the outer wall of the oxygen pipe, then the angle adjusting ring is rotated by one angle, the driving device is turned on to drive the driving roller to rotate in the forward direction, the oxygen pipe is slowly moved vertically downward until the bottom bowl of the tundish is touched by using the friction force between the driving roller and the outer wall of the oxygen pipe, the insertion length of the oxygen pipe is measured again, then the angle adjusting ring is rotated by multiple angles according to the above method and the insertion lengths are measured multiple times, the measured values are compared to ensure the accuracy of the measurement data.

[0016] The further improvement of the positioning device for auxiliary continuous casting tundish liquid level measurement has a limiting sliding groove on one side of the connecting frame, and a pressure sensor is fixedly installed at the lower end of the limiting sliding groove; a limiting sliding block is fixedly arranged at the movable end of the electric push rod, and the limiting sliding block is in sliding cooperation with the limiting sliding groove, and the limiting sliding block is above the pressure sensor; when the pressure sensor contacts with the limiting sliding block and the pressure exceeds the set threshold value, a trigger signal indicates that the oxygen pipe has contacted with an object.

[0017] Preferably, the driving roller is installed in the positioning guide mechanism through a fixing frame; the driving device is a small servo motor which is fixedly installed at one side of the front end of the positioning guide mechanism, the output shaft of the driving device is connected with the rotating shaft of the driving roller through a shaft coupling, and the signal output end of the pressure sensor is connected with a microprocessor, and the microprocessor is connected with the driving device.

[0018] According to another aspect of the present application, a use method of the positioning device for auxiliary continuous casting tundish liquid level measurement is provided, and the method has the following steps: inserting the lower end of the oxygen pipe into the positioning cavity between the driving roller and the extrusion roller on the positioning guide mechanism, then starting the electric push rod, driving the oxygen pipe on the positioning guide mechanism to move in the horizontal direction and reach the measurement position, starting the driving device to drive the driving roller to rotate, using the friction force between the driving roller and the outer wall of the oxygen pipe to drive the oxygen pipe to slowly move vertically downward, when the oxygen pipe touches the bowl opening position at the bottom of the tundish, the oxygen pipe generates a reaction force on the positioning guide mechanism, so that the connecting frame moves upward, and then the pressure sensor contacts with the limiting sliding block and is extruded, the pressure sensor detects the pressure value electrical signal and sends it to the processor, when the detected pressure value exceeds the set threshold value, the processor closes the driving device on the positioning guide mechanism, realizes the positioning of the oxygen pipe at the position, and measures the insertion length of the oxygen pipe.

[0019] According to another aspect of the present application, after the extension length of the oxygen tube is measured, the driving device is reversed to drive the driving roller to rotate, the driving roller and the outer wall of the oxygen tube form a friction force to drive the oxygen tube to slowly move vertically upward for a distance, the angle adjusting ring is rotated by an angle, the driving device is forwardly driven to drive the driving roller to rotate, the driving roller and the outer wall of the oxygen tube form a friction force to drive the oxygen tube to slowly move vertically downward, when the oxygen tube again touches the bowl opening position at the bottom of the inside of the tundish, the oxygen tube generates a reaction force on the positioning guide mechanism, the connecting frame is again moved upward, and the pressure sensor is in contact with and pressed by the limiting sliding block, the pressure sensor detects the pressure value electrical signal and sends it to the processor, when the detected pressure value again exceeds the set threshold value, the driving device on the positioning guide mechanism is turned off by the processor to realize the positioning of the oxygen tube at the position, and the extension length of the oxygen tube is measured again, then the angle adjusting ring is rotated by multiple angles according to the above method and the extension length is measured multiple times, the measured values are compared to ensure the accuracy of the measurement data.

[0020] Compared with the prior art, the positioning device for assisting the liquid level measurement of the continuous casting tundish and the use method thereof have the following beneficial effects:

[0021] (1) The positioning guide mechanism is provided, the lower end of the oxygen tube is inserted between the driving roller and the pressing roller, and the pressing roller is tightly attached to the oxygen tube under the action of the supporting spring, so that the stability of the positioning of the oxygen tube is ensured, the driving device (a small servo motor) is turned on, one end of the output shaft of the driving device can drive the driving roller to rotate, friction is formed between the driving roller and the outer wall of the oxygen tube, and the oxygen tube is slowly moved downward, when the oxygen tube contacts the bowl opening, an upward reaction force is generated, the connecting frame between the two positioning guide mechanisms is moved upward, the pressure sensor and the limiting sliding block form a pressing force, the pressure sensor detects the pressure value, converts the electrical signal and sends it to the processor, when the pressure value exceeds the preset pressure threshold value, the driving device of the positioning guide mechanism is turned off by the processor to realize the positioning of the oxygen tube at the position, and the accuracy of the measurement position is ensured, the liquid level height is accurately measured, and the tundish casting surplus can be reasonably controlled to save costs.

[0022] (2) The application is provided with an oxygen pipe transverse adjusting mechanism. Under the action of the electric push rod, the movable end can drive the positioning guide mechanism to move in the horizontal direction, so as to ensure that the oxygen pipe can coincide with the bottom bowl mouth after entering the tundish, and the purpose of accurate measurement is achieved. At the same time, the positioning guide mechanism can revolve around the center of the stopper lifting driving mechanism as the origin. By rotating the positioning guide mechanism, the angle adjusting ring is driven to rotate outside the fixed ring. By arranging the arc-shaped grooves in the annular distribution on the outer wall of the fixed ring, and installing the spring sheets in the annular distribution in the inner hole of the angle adjusting ring, the spring sheets can be clamped with the arc-shaped grooves once every fixed angle of the angle adjusting ring. This mechanism can measure the bowl mouth position at different angles under the same telescopic length of the oxygen pipe. If the measured values are consistent after multiple measurements, the accuracy of the measurement data can be ensured, and the generation of errors can be minimized.

[0023] (3) The application adopts the movable connection structure of the fixed ring and the stopper lifting driving mechanism. By rotating the rotating wheel, the arc-shaped clamping plate and the stopper lifting driving mechanism can be fixed and loosened, so as to avoid hindering the daily production operation, and the flexibility is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of the positioning device for assisting the liquid level measurement of the continuous casting tundish.

[0025] Figure 2 It is a sectional structural schematic view of the positioning device for assisting the liquid level measurement of the continuous casting tundish.

[0026] Figure 3 It is Figure 2 It is an enlarged schematic view of A in the middle.

[0027] Figure 4 It is a schematic view of the oxygen pipe, driving roller and extrusion roller in the positioning device for assisting the liquid level measurement of the continuous casting tundish.

[0028] Figure 5 It is a structural schematic view of the fixed ring fixed outside the stopper lifting driving mechanism in the positioning device for assisting the liquid level measurement of the continuous casting tundish.

[0029] Figure 6 It is a schematic view of the angle adjusting ring and the fixed ring clamping in the positioning device for assisting the liquid level measurement of the continuous casting tundish.

[0030] In the diagram: 1. Intermediate liner; 2. Stopper rod mechanism; 3. Stopper rod lifting drive mechanism; 4. Fixed ring; 5. Angle adjustment ring; 6. Positioning guide mechanism; 7. Connecting frame; 8. Rotary wheel; 9. Electric push rod; 10. Oxygen tube; 11. Limiting slider; 12. Limiting groove; 13. Pressure sensor; 14. Fixed frame; 15. Drive roller; 16. Drive device; 17. Movable frame; 18. Extrusion roller; 19. Support spring; 20. Screw; 21. Arc-shaped clamping plate; 22. Arc-shaped groove; 23. Spring plate. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this disclosure pertains. The terms "upper," "lower," "left," "right," "front," and "back" used in the specification and claims of this patent application are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Any aspects not detailed in this application are well-known technologies to those skilled in the art.

[0032] Example 1:

[0033] like Figures 1-6 As shown in the figure, this embodiment of a positioning device for assisting in the measurement of liquid level in a continuous casting tundish includes a tundish 1. A stopper rod mechanism 2 is provided at the middle position of the upper end face of the tundish 1. The stopper rod mechanism 2 is an existing mechanism. A stopper rod lifting drive mechanism 3 is installed above it to drive the lifting and lowering of the tundish stopper rod. A bowl-shaped structure is provided at the center position of the bottom of the tundish 1. The positioning device of this embodiment also includes a fixing ring 4, an angle adjusting ring 5, a positioning guide mechanism 6, an electric push rod 9, and an oxygen pipe 10, etc.

[0034] The fixed ring 4 is sleeved outside the stopper lifting driving mechanism 3; the angle adjusting ring 5 is connected outside the fixed ring 4 through a bearing, the angle adjusting ring 5 can be freely rotated by applying external force, and is kept fixed at the position when not under force; the fixed end of the electric push rod 9 is installed on one side of the angle adjusting ring 5, for controlling the horizontal telescopic length; the positioning guide mechanism 6 is arranged on one side of the movable end of the electric push rod 9, the positioning guide mechanism 6 is provided with two upper and lower ones and is welded and fixed through the connecting frame 7, the connecting frame 7 is used for connecting the two guide mechanisms 6 into one, on the one hand, plays a reinforcing role, and on the other hand, is used for realizing detection whether the oxygen pipe 10 contacts the bowl opening position of the tundish bottom; one side inside the positioning guide mechanism 6 is provided with a driving roller 15, the other side is provided with a pressing roller 18 corresponding to the driving roller 15, a positioning cavity for positioning and adjusting the oxygen pipe 10 is formed between the two rollers, the driving roller 15 is connected with a driving device 16, when the oxygen pipe 10 is inserted into the positioning cavity formed by the driving roller 15 and the pressing roller 18, the oxygen pipe 10 is driven to ascend or descend through the forward or reverse rotation of the driving device 16; the lower end of the oxygen pipe 10 extends to the inside of the tundish 1 through the positioning cavity, for measuring the liquid level inside the tundish.

[0035] Please refer to Figure 4 The pressing roller 18 is installed in the positioning guide mechanism 6 through the movable frame 17, the pressing roller 18 is connected with the movable frame 17 through a rotating shaft, the outer wall of the movable frame 17 is in sliding limiting fit with the inner cavity of the positioning guide mechanism 6, a supporting spring 19 is arranged between the two, and the supporting spring 19 is used for pressing the oxygen pipe 10 tightly by the pressing roller 18.

[0036] Please refer to Figure 5 Corresponding arc-shaped clamping plates 21 are arranged in front of and behind the inside of the fixed ring 4, and rotary wheels 8 are arranged on the outside of the fixed ring 4, one end of each rotary wheel 8 is fixedly connected with a screw rod 20, the screw rod 20 penetrates through the fixed ring 4 and is in threaded fit with the fixed ring 4, and the other end of the screw rod 20 is rotatably connected with the arc-shaped clamping plate 21 through a bearing. When the fixed ring 4 is disassembled outside the stopper lifting driving mechanism 3, the operator only needs to rotate the two rotary wheels 8, drives the screw rod 20 at one end to rotate, under the friction of the outer thread and the fixed ring 4, moves the arc-shaped clamping plate 21 away from the stopper lifting driving mechanism 3, and makes the arc-shaped clamping plate 21 lose the fixing effect on the stopper lifting driving mechanism 3, at this time, the positioning device can be separated from the stopper lifting driving mechanism 3 by pulling the fixed ring 4 upwards. Conversely, the fixed ring 4 is installed.

[0037] Please refer to Figure 6, the middle position of the outer wall of the fixed ring 4 is provided with a plurality of annular equidistantly distributed arc-shaped grooves 22, the inner wall of the angle adjusting ring 5 is provided with a plurality of annular equidistantly distributed spring sheets 23, and the spring sheet 23 is clamped with the arc-shaped groove 22. Under the action of the electric push rod 9, the movable end of the electric push rod 9 can drive the connecting frame 7 and the positioning guide mechanism 6 to move in the horizontal direction, so that the oxygen pipe 10 can coincide with the bottom bowl after entering the tundish 1, and the purpose of accurate measurement is achieved; at the same time, the positioning guide mechanism 6 can revolve around the center of the stopper lifting driving mechanism 3 as the origin, the positioning guide mechanism 6 is rotated by rotating the angle adjusting ring 5 outside the fixed ring 4, and the spring sheet 23 can be clamped with the arc-shaped groove 22 once every fixed angle of the angle adjusting ring 5. The mechanism can realize the measurement of the bowl at different angles under the same telescopic length of the oxygen pipe 10. If the measured values are consistent after multiple measurements, the accuracy of the measurement data is ensured, and the generation of errors is minimized.

[0038] Embodiment 2

[0039] On the basis of embodiment 1, the positioning device for assisting in measuring the liquid level of the continuous casting tundish is provided, please refer to Figure 3 One side of the connecting frame 7 is provided with a limiting sliding groove 12, and the lower end of the limiting sliding groove 12 is fixedly installed with a pressure sensor 13; the movable end of the electric push rod 9 is fixedly provided with a limiting sliding block 11, the limiting sliding block 11 is in sliding cooperation with the limiting sliding groove 12, and the limiting sliding block 11 is located above the pressure sensor 13. When the pressure sensor 13 contacts the limiting sliding block 11 and the pressure exceeds the set threshold value, a trigger signal indicates that the oxygen pipe 10 has contacted an object.

[0040] The driving roller 15 is installed in the positioning guide mechanism 6 through the fixed frame 14; the driving device 16 is a small servo motor, which is fixedly installed on one side of the front end of the positioning guide mechanism 6, and the output shaft of the driving device 16 is connected with the rotating shaft of the driving roller 15 through a shaft coupling; the signal output end of the pressure sensor 13 is connected with a microprocessor, and the microprocessor is connected with the driving device 16.

[0041] Embodiment 3

[0042] A method for using the positioning device for assisting in measuring the liquid level of the continuous casting tundish in embodiment 1 or embodiment 2, the steps are as follows: the lower end of the oxygen pipe 10 is inserted into the positioning cavity between the driving roller 15 and the extrusion roller 18 on the positioning guide mechanism 6, then the electric push rod 9 is started, the movable end of the electric push rod 9 drives the oxygen pipe 10 on the positioning guide mechanism 6 to move in the horizontal direction and reaches the measurement position, the driving device 16 is started to drive the driving roller 15 to rotate, the friction force between the driving roller 15 and the outer wall of the oxygen pipe 10 drives the oxygen pipe 10 to slowly move vertically downward until the oxygen pipe 10 touches the bottom bowl position inside the tundish 1, and the inserted length of the oxygen pipe 10 is measured.

[0043] The preferred embodiment of the above method is that after measuring the insertion length of the oxygen tube 10, the driving device 16 reversely drives the driving roller 15 to rotate, the driving roller 15 and the outer wall of the oxygen tube 10 form a friction force to slowly vertically move the oxygen tube 10 upward by a distance, then the angle adjusting ring 5 is rotated by an angle, the driving device 16 positively drives the driving roller 15 to rotate, the driving roller 15 and the outer wall of the oxygen tube 10 form a friction force to slowly vertically move the oxygen tube 10 downward until the oxygen tube 10 touches the bowl opening position at the bottom of the inner side of the tundish 1, then the insertion length of the oxygen tube 10 is measured again, then the angle adjusting ring 5 is rotated by multiple angles according to the above method and multiple insertion lengths are measured, the measured values are compared to ensure the accuracy of the measurement data.

[0044] Example 4

[0045] A method for using the positioning device for assisting the measurement of the liquid level of the continuous casting tundish in Example 2, the steps are as follows: the lower end of the oxygen tube 10 is inserted into the positioning cavity between the driving roller 15 and the pressing roller 18 of the positioning guide mechanism 6, then the electric push rod 9 is turned on, the movable end of the electric push rod 9 drives the oxygen tube 10 on the positioning guide mechanism 6 to move in the horizontal direction and reach the measurement position, the driving device 16 positively drives the driving roller 15 to rotate, the driving roller 15 and the outer wall of the oxygen tube 10 form a friction force to slowly vertically move the oxygen tube 10 downward, when the oxygen tube 10 touches the bowl opening position at the bottom of the inner side of the tundish 1, the oxygen tube 10 generates a reaction force on the positioning guide mechanism 6, which makes the connecting frame 7 move upward, and then the pressure sensor 13 contacts and presses the limiting sliding block 11, the pressure sensor 13 detects the pressure value electrical signal and sends it to the processor, when the detected pressure value exceeds the set threshold value, the driving device 16 on the positioning guide mechanism 6 is turned off by the processor, the positioning of the oxygen tube 10 at this position is realized, and the insertion length of the oxygen tube 10 is measured.

[0046] The preferred embodiment of the above method is that after measuring the extension length of the oxygen tube 10, the driving device 16 reversely drives the driving roller 15 to rotate, the driving roller 15 and the outer wall of the oxygen tube 10 form a friction force to slowly vertically move the oxygen tube 10 upward by a distance, then the angle adjusting ring 5 rotates by an angle, the driving device 16 positively drives the driving roller 15 to rotate, the driving roller 15 and the outer wall of the oxygen tube 10 form a friction force to slowly vertically move the oxygen tube 10 downward, when the oxygen tube 10 again touches the bowl opening position at the inner bottom of the tundish 1, the oxygen tube 10 generates a reaction force on the positioning guide mechanism 6, the connecting frame 7 is again moved upward, and then the pressure sensor 13 contacts and presses the limiting sliding block 11, the pressure sensor 13 detects the pressure value electrical signal and sends it to the processor, when the detected pressure value again exceeds the set threshold value, the driving device 16 on the positioning guide mechanism 6 is turned off through the processor, the positioning of the oxygen tube 10 at the position is realized, and the extension length of the oxygen tube 10 is measured again, then the angle adjusting ring 5 is rotated by multiple angles according to the above method and multiple extension lengths are measured, the measured values are compared to ensure the accuracy of the measurement data.

Claims

1. A positioning device for assisting in continuous casting tundish level measurement, comprising a tundish (1), wherein a stopper rod mechanism (2) is provided at the middle position of the upper end face of the tundish (1), a stopper rod lifting drive mechanism (3) is installed above the stopper rod mechanism (2), and a bowl is provided at the center position of the bottom of the tundish (1), characterized in that, Also includes: A fixed ring (4) is sleeved on the outside of the stopper rod lifting drive mechanism (3); An angle adjustment ring (5) is connected to the outside of the fixed ring (4) by a bearing. It can rotate freely under external force and remain fixed in position when no force is applied. An electric push rod (9) has its fixed end installed on one side of the angle adjustment ring (5); The positioning guide mechanism (6) is located on one side of the movable end of the electric push rod (9). The positioning guide mechanism (6) has two parts, one above the other, which are fixedly connected by a connecting frame (7). The positioning guide mechanism (6) has a drive roller (15) on one side and a compression roller (18) on the other side. A positioning cavity for positioning and adjusting the oxygen tube (10) is formed between the two rollers. The drive roller (15) is connected to a drive device (16). The oxygen tube (10) extends through the positioning cavity and into the interior of the intermediate package (1).

2. The positioning device for assisting in continuous casting tundish level measurement according to claim 1, characterized in that: The connecting frame (7) is provided with a limiting groove (12) on one side, and a pressure sensor (13) is fixedly installed at the lower end of the limiting groove (12); the movable end of the electric push rod (9) is fixedly provided with a limiting slider (11), the limiting slider (11) slides with the limiting groove (12), the limiting slider (11) is located above the pressure sensor (13), when the pressure sensor (13) contacts the limiting slider (11) and the pressure exceeds the set threshold, a trigger signal indicates that the oxygen tube (10) has contacted the object.

3. The positioning device for assisting in continuous casting tundish level measurement according to claim 2, characterized in that: The drive roller (15) is installed in the positioning guide mechanism (6) through the fixing frame (14); the drive device (16) is a small servo motor, which is fixedly installed on one side of the front end of the positioning guide mechanism (6), and the output shaft of the drive device (16) is connected to the rotating shaft of the drive roller (15) through a coupling; the signal output end of the pressure sensor (13) is connected to a microprocessor, and the microprocessor is connected to the drive device (16).

4. The positioning device for assisting in continuous casting tundish level measurement according to claim 1, characterized in that: The extrusion roller (18) is installed in the positioning guide mechanism (6) via a movable frame (17). The movable frame (17) and the inner cavity of the positioning guide mechanism (6) are in sliding limit cooperation. A support spring (19) is provided between them. The support spring (19) is used to make the extrusion roller (18) press the oxygen tube (10).

5. The positioning device for assisting in continuous casting tundish level measurement according to claim 1, characterized in that: The fixed ring (4) has arc-shaped clamping plates (21) inside both the front and back. The fixed ring (4) has rotating wheels (8) outside both the front and back. One end of the rotating wheel (8) is fixedly connected to a screw (20). The screw (20) is threadedly engaged with the fixed ring (4), and its other end is connected to the arc-shaped clamping plate (21) through a bearing.

6. The positioning device for assisting in continuous casting tundish level measurement according to claim 1, characterized in that: The outer wall of the fixed ring (4) is provided with several annularly distributed arc grooves (22), and the inner wall of the angle adjustment ring (5) is provided with several annularly distributed spring pieces (23), which engage with the arc grooves (22).

7. A method of using the positioning device for auxiliary continuous casting tundish level measurement as described in any one of claims 1-6, characterized in that: Insert the lower end of the oxygen tube (10) into the positioning cavity between the drive roller (15) and the extrusion roller (18) on the positioning guide mechanism (6). Then turn on the electric push rod (9). The moving end of the electric push rod (9) drives the oxygen tube (10) on the positioning guide mechanism (6) to move horizontally and reach the measurement position. Turn on the drive device (16) to drive the drive roller (15) to rotate in the forward direction. The friction between the drive roller (15) and the outer wall of the oxygen tube (10) drives the oxygen tube (10) to move slowly vertically downward until it touches the bottom bowl position inside the intermediate bag (1). Measure the insertion length of the oxygen tube (10).

8. The method of using the positioning device for auxiliary continuous casting tundish level measurement according to claim 7, characterized in that: After measuring the insertion length of the oxygen tube (10) once, the drive device (16) drives the drive roller (15) to rotate in the opposite direction. The friction between the drive roller (15) and the outer wall of the oxygen tube (10) causes the oxygen tube (10) to move slowly vertically upward for a certain distance. Then, the angle adjustment ring (5) is rotated by an angle, and the drive device (16) drives the drive roller (15) to rotate in the forward direction. The friction between the drive roller (15) and the outer wall of the oxygen tube (10) causes the oxygen tube (10) to move slowly vertically downward until it touches the bottom bowl position inside the intermediate bag (1). The insertion length of the oxygen tube (10) is measured again. Then, the insertion length is measured multiple times by rotating the angle adjustment ring (5) in the same way. The values ​​measured each time are compared to ensure the accuracy of the measurement data.

9. A method of using the positioning device for auxiliary continuous casting tundish level measurement as described in claim 6, characterized in that: Insert the lower end of the oxygen tube (10) into the positioning cavity between the drive roller (15) and the extrusion roller (18) on the positioning guide mechanism (6). Then turn on the electric push rod (9). The moving end of the electric push rod (9) drives the oxygen tube (10) on the positioning guide mechanism (6) to move horizontally and reach the measurement position. Turn on the drive device (16) to drive the drive roller (15) to rotate in the forward direction. The friction between the drive roller (15) and the outer wall of the oxygen tube (10) drives the oxygen tube (10) to move slowly vertically downward. When the oxygen tube (10) is in the middle, the oxygen tube (10) moves vertically downward. 0) When the oxygen tube (10) touches the bottom bowl position inside the intermediate bag (1), the oxygen tube (10) generates a reaction force on the positioning guide mechanism (6), causing the connecting frame (7) to move upward, thereby causing the pressure sensor (13) to contact and squeeze the limiting slider (11). The pressure sensor (13) detects the pressure value electrical signal and sends it to the processor. When the detected pressure value exceeds the set threshold, the processor shuts down the drive device (16) on the positioning guide mechanism (6) to realize the positioning of the oxygen tube (10) at that position and measure the insertion length of the oxygen tube (10).

10. The method of using the positioning device for auxiliary continuous casting tundish level measurement according to claim 9, characterized in that: After measuring the insertion length of the oxygen tube (10), the drive device (16) drives the drive roller (15) to rotate in the reverse direction. The friction between the drive roller (15) and the outer wall of the oxygen tube (10) causes the oxygen tube (10) to move slowly vertically upwards a certain distance. Then, the angle adjustment ring (5) is rotated by an angle, and the drive device (16) drives the drive roller (15) to rotate in the forward direction. The friction between the drive roller (15) and the outer wall of the oxygen tube (10) causes the oxygen tube (10) to move slowly vertically downwards. When the oxygen tube (10) touches the bottom bowl position inside the intermediate bag (1) again, the oxygen tube (10) moves against the positioning guide. The reaction force generated on the mechanism (6) causes the connecting frame (7) to move upward again, thereby causing the pressure sensor (13) to contact and squeeze the limiting slider (11). The pressure sensor (13) detects the pressure value electrical signal and sends it to the processor. When the detected pressure value exceeds the set threshold again, the processor shuts down the drive device (16) on the positioning guide mechanism (6) to realize the positioning of the oxygen tube (10) at that position, and measures the insertion length of the oxygen tube (10) again. Then, the angle adjustment ring (5) is rotated at multiple angles and the insertion length is measured multiple times in the same way. The measured values ​​are compared to ensure the accuracy of the measurement data.

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