On-line steelmaking plant continuous casting machine ladle weighing sensor calibration device and use method

Abstract

The present invention relates to an online calibration device for a ladle weighing sensor of a continuous casting machine in a steel mill, comprising a driving module arranged on one side of a ladle arm and a calibration module arranged on the driving module; the driving module comprises a mechanical arm and a calibration part, the calibration part is arranged at the top of the mechanical arm, and a calibration cavity for placing the ladle arm is arranged in the calibration part; the calibration module comprises a hydraulic station and a hydraulic jack, the top rod of the hydraulic jack faces downward, and the bottom of the hydraulic jack is fixedly connected to the top of the calibration cavity, the hydraulic station is arranged outside the calibration part and located on the mechanical arm, and the hydraulic station is connected to the hydraulic jack through an oil pipe. The present invention also discloses a method for using the online calibration device for a ladle weighing sensor of a continuous casting machine in a steel mill, and performs online calibration on an unloaded ladle arm when the continuous casting machine is in normal production. The present invention improves the accuracy of weighing without affecting production, which is conducive to the normal progress of production.

Description

Technical Field

[0001] The present invention relates to the technical field of calibration devices, and more particularly to an online calibration device for a ladle weighing sensor of a continuous casting machine in a steelmaking plant and a method for using the same. Background Art

[0002] The large bag of the continuous casting machine in the steel plant needs to be recalibrated after being used for a period of time. The general calibration method is to use the overhead crane to lift the weight bag to the large bag of the continuous casting machine during maintenance, and adjust the large bag scale of the continuous casting machine according to the weight of the weight bag measured on the large bag of the continuous casting machine and the standard weight of the weight. However, in actual calibration, due to the frequent use of the overhead crane, and the need to apply before using the overhead crane, the weight bag is hoisted to the large bag arm for comparison and calibration, and it is often necessary to wait until the overhead crane is free to carry out. Moreover, the longer the weight bag is stored, the easier it is to rust, resulting in the actual weight of the weight bag being different from the calibrated weight. The use of this weight bag cannot effectively calibrate the large bag weighing sensor of the continuous casting machine. In addition, the weight of the weight bag is generally over 100 tons, and there are also safety risks in using the overhead crane to lift it. Therefore, it is necessary to propose a new calibration device to solve the above problems. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an online calibration device and a method for using a ladle weighing sensor of a continuous casting machine in a steelmaking plant, so that the weighing sensor of the ladle arm can be calibrated online when the continuous casting machine is in normal production, thereby improving the weighing accuracy without affecting production, which is conducive to the normal production.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] An online steelmaking plant continuous casting machine ladle weighing sensor calibration device comprises a driving module arranged on one side of a ladle arm and a calibration module arranged on the driving module;

[0006] The driving module includes a mechanical arm and a calibration part, wherein the calibration part is arranged at the top of the mechanical arm, and a calibration cavity is arranged in the calibration part for accommodating the large bag arm;

[0007] The calibration module includes a hydraulic station and a hydraulic jack, the top rod of the hydraulic jack faces downward, and the bottom of the hydraulic jack is fixedly connected to the top of the calibration chamber. The hydraulic station is arranged outside the calibration part and located on the mechanical arm, and the hydraulic station is connected to the hydraulic jack through an oil pipe.

[0008] In one embodiment, the inner side wall of the calibration cavity is horizontally provided with a plurality of positioning pins adapted to the through holes of the large bag arm. The large bag arm has a plurality of through holes, and when the large bag arm is placed in the calibration cavity, the bottom of the large bag arm contacts the bottom of the calibration cavity, and the positioning pins pass through the through holes of the large bag arm, so as to fix the position of the large bag arm.

[0009] In one embodiment, a positioning ring is provided at one end of the positioning pin close to the calibration cavity, and a buffer layer is provided on the outward side of the positioning ring. When the positioning pin passes through the through hole of the large bag arm, the positioning ring restricts the large bag arm from further entering the calibration cavity, so that the weighing sensor on the large bag arm is located directly below the hydraulic jack.

[0010] In one embodiment, the number of the positioning pins is at least two, and the positioning pins are symmetrically distributed.

[0011] In one of the embodiments, a rotating rod that flips outward is provided on the outer top side of the calibration part, a docking slot is provided on the outer end of the rotating rod, the length of the rotating rod is greater than the height of the calibration cavity, and a locking bolt that cooperates with the docking slot is provided on the outer bottom side of the calibration part. The rotating rod flips downward to the locking bolt, and the locking bolt is embedded in the docking slot of the rotating rod.

[0012] In one of the embodiments, a flip motor is provided on the top of the calibration portion, and the output shaft of the flip motor is connected to one end of the rotating rod to drive the rotating rod to flip downward or upward.

[0013] In one embodiment, the mandrel of the hydraulic jack is provided with a pressure plate, the area of ​​which is smaller than the base area of ​​the weighing sensor, so as to prevent the mandrel from directly applying pressure to the base of the weighing sensor and causing scratches on the base of the weighing sensor.

[0014] In one embodiment, a pressure sensor is further provided between the buffer layer and the positioning ring. When the pressure sensors of all positioning pins detect pressure values, it indicates that the large bag arm has been fully inserted, and the weighing sensor on the large bag arm is located directly below the hydraulic jack.

[0015] The method of using the online steelmaking plant continuous casting machine ladle weighing sensor calibration device is as follows:

[0016] A turret mechanism is provided at the bottom of the continuous casting machine, and two large ladle arms are symmetrically arranged on both sides of the continuous casting machine. When one of the large ladle arms is weighed, the other large ladle arm is in an unloaded state. The mechanical arm drives the calibration part to approach the unloaded large ladle arm, so that the unloaded large ladle arm enters the bottom of the calibration cavity of the calibration part. At this time, the bottom of the large ladle arm contacts the bottom of the calibration cavity and moves into the calibration cavity along the bottom of the calibration cavity. At the same time, the positioning pins in the calibration cavity are respectively inserted into the through holes of the large ladle arm. When the large ladle arm completely enters the calibration cavity, the mechanical arm stops. At this time, the weighing sensor on the large ladle arm is located directly below the hydraulic jack;

[0017] Start the flip motor to flip the rotating pull rod downward to the locking bolt, the locking bolt is embedded in the docking slot of the rotating pull rod, and the large bag arm is fixed in the calibration cavity;

[0018] Drive the hydraulic jack through the hydraulic station to apply a fixed pressure to the weighing sensor in the big bag arm, read the real-time measurement value of the weighing sensor, and compare the real-time measurement value with the pressure applied by the hydraulic jack. If the real-time measurement value is greater than or less than the pressure applied by the hydraulic jack, calibrate the weighing sensor. If the real-time measurement value is equal to the pressure applied by the hydraulic jack, it means that the weighing sensor is normal.

[0019] After the calibration is completed, the flip motor is started again to flip the rotating pull rod upward to the top of the calibration part, and the mechanical arm is started to drive the calibration part to leave the large bag arm;

[0020] After the subcontract is transferred, the original weighing arm is in an unloaded state, and the weighing sensor of the unloaded arm is calibrated.

[0021] In one of the embodiments, when the large bag arm enters the calibration cavity, all the positioning pins in the calibration cavity are respectively inserted into the through holes of the large bag arm. When the pressure sensors of all the positioning pins detect pressure values, it means that the large bag arm has moved into place and the robotic arm stops.

[0022] In summary, the present invention has the following beneficial effects:

[0023] The calibration chamber of the present invention can accommodate a large ladle arm, and the hydraulic jack on the top of the calibration chamber applies pressure to the weighing sensor of the large ladle arm. The weighing sensor is calibrated by comparing the pressure applied by the hydraulic jack with the value detected by the weighing sensor. Since the calibration part is driven by a mechanical arm, during normal production, the calibration part can be driven by the mechanical arm to approach the unloaded large ladle arm for calibration, which does not affect the normal production rhythm, thereby realizing the online calibration of the large ladle weighing sensor of the continuous casting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the large bag arm of the continuous casting machine;

[0025] Figure 2 It is a structural schematic diagram of the present invention.

[0026] In the figure: 1-large bag arm, 2-through hole, 3-base, 4-mechanical arm, 5-calibration part, 6-hydraulic station, 7-hydraulic jack, 8-oil pipe, 9-thrust rod, 10-pressure plate, 11-locating pin, 12-locating ring, 13-buffer layer, 14-rotating pull rod, 15-docking slot, 16-locking bolt, 17-flip motor, 18-calibration cavity. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] It is worth noting that the directional words such as "upper" and "lower" involved in this article are all relative to the viewing angle of the drawings and are only for the convenience of description and cannot be understood as a limitation on the technical solution.

[0029] like Figure 1 and 2 As shown, the present invention provides an online steelmaking plant continuous casting machine ladle weighing sensor calibration device, comprising a driving module arranged on one side of a ladle arm 1 and a calibration module arranged on the driving module;

[0030] The driving module includes a mechanical arm 4 and a calibration unit 5. The calibration unit 5 is disposed at the top of the mechanical arm 4. A calibration cavity 18 is disposed in the calibration unit 5 for accommodating the large bag arm 1.

[0031] The calibration module includes a hydraulic station 6 and a hydraulic jack 7. The top rod 9 of the hydraulic jack 7 faces downward, and the bottom of the hydraulic jack 7 is fixedly connected to the top of the calibration chamber 18. The hydraulic station 6 is arranged outside the calibration part 5 and located on the mechanical arm 4. The hydraulic station 6 is connected to the hydraulic jack 7 through an oil pipe 8.

[0032] Preferably, the push rod 9 of the hydraulic jack 7 is provided with a pressure plate 10, and the area of ​​the pressure plate 10 is smaller than the area of ​​the base 3 of the weighing sensor, so as to avoid the push rod 9 directly applying pressure to the base 3 of the weighing sensor, thereby scratching the base 3 of the weighing sensor.

[0033] Specifically, the robotic arm 4 drives the calibration part 5 to approach the large bag arm 1, so that the large bag arm 1 enters the calibration chamber 18. At this time, the bottom of the large bag arm 1 contacts the bottom of the calibration chamber 18, and the large bag arm 1 continues to move into the calibration chamber 18 along the bottom of the calibration chamber 18 until the weighing sensor on the large bag arm 1 is located directly below the hydraulic jack 7. Then the robotic arm 4 is stopped, and the top rod 9 of the hydraulic jack 7 is extended through the hydraulic station 6 to apply pressure to the weighing sensor of the large bag arm 1. The weighing sensor is calibrated by comparing the value detected by the weighing sensor with the pressure applied by the hydraulic jack 7.

[0034] It is understandable that the height of the calibration cavity 18 needs to be greater than the sum of the height of the large bag arm 1 and the height of the hydraulic jack 7 , so that the large bag arm 1 can smoothly enter the calibration cavity 18 .

[0035] Furthermore, the inner side wall of the calibration cavity 18 is horizontally provided with a plurality of positioning pins 11 adapted to the through holes 2 of the large bag arm 1. The large bag arm 1 has a plurality of through holes 2. When the large bag arm 1 is placed in the calibration cavity 18, the bottom of the large bag arm 1 contacts the bottom of the calibration cavity 18, and the positioning pins 11 pass through the through holes 2 of the large bag arm 1, so as to fix the position of the large bag arm 1.

[0036] The large bag arm 1 is in the calibration cavity 18. If there is no positioning pin 11 to further fix it, when the top rod 9 of the hydraulic jack 7 applies pressure to the weighing sensor of the large bag arm 1, the large bag arm 1 may move in the calibration cavity 18, resulting in inaccurate calibration. It can be understood that the adaptation of the positioning pin 11 to the through hole 2 of the large bag arm 1 means that the diameter of the positioning pin 11 is slightly smaller than the inner diameter of the through hole 2, and the height of the positioning pin 11 set in the calibration cavity 18 should be the same as the actual height of the through hole 2 of the large bag arm 1 after the large bag arm 1 enters the calibration cavity 18, that is, when the positioning pin 11 is inserted into the through hole 2, the large bag arm 1 cannot be in a suspended or partially suspended state. This is because when the top rod 9 of the hydraulic jack 7 applies pressure downward, if the large bag arm 1 is in a suspended or partially suspended state, it will affect the accuracy of the calibration and the positioning pin 11 is easy to break. The most ideal state of the connection between the positioning pin 11 and the through hole 2 is that the positioning pin 11 limits the horizontal movement of the large bag arm 1, but the large bag arm 1 does not apply downward pressure to the positioning pin 11.

[0037] Furthermore, the outer end of the positioning pin 11 is a spherical surface, which facilitates the alignment of the positioning pin 11 with the through hole 2 of the large bag arm 1, and the positioning pin 11 is cylindrical in shape, and the outer surface of the positioning pin 11 is a smooth surface. Preferably, the number of the positioning pins 11 is at least two, and the positioning pins 11 are symmetrically distributed. In order to facilitate the replacement of damaged positioning pins 11, the positioning pins 11 are detachably connected to the inner wall of the calibration cavity 18.

[0038] Furthermore, a positioning ring 12 is provided at one end of the positioning pin 11 close to the calibration cavity 18, and a buffer layer 13 is provided on the outward side of the positioning ring 12. When the positioning pin 11 passes through the through hole 2 of the large bag arm 1, the positioning ring 12 restricts the large bag arm 1 from further entering the calibration cavity 18, so that the weighing sensor on the large bag arm 1 is located directly below the hydraulic jack 7.

[0039] It is understandable that when the large bag arm 1 enters the calibration cavity 18, it is difficult to accurately control the angle of entry, so it is easy for a portion of the positioning pins 11 to be embedded in the through hole 2 for a greater length than the remaining positioning pins 11. If the large bag arm 1 continues to move forward at the same angle, it is easy for the large bag arm 1 to hit the calibration cavity 18 and the positioning pins 11 to break. Therefore, a positioning ring 12 is provided at the positioning pin 11. When one side of the large bag arm 1 has contacted the positioning ring 12 and the other side has not yet contacted the positioning ring 12, the end that has contacted the positioning ring 12 will no longer continue to move, and the end that has not contacted the positioning ring 12 will continue to move until the large bag arm 1 contacts all the positioning rings 12. At this time, the weighing sensor on the large bag arm 1 is located just below the hydraulic jack 7.

[0040] Furthermore, a pressure sensor is provided between the buffer layer 13 and the positioning ring 12. When the pressure sensors of all the positioning pins 11 detect pressure values, it indicates that the large bag arm 1 has been fully inserted, and the weighing sensor on the large bag arm 1 is located directly below the hydraulic jack 7.

[0041] Specifically, the movement of the large bag arm 1 in the calibration chamber 18 is monitored in real time by the pressure sensor at the positioning ring 12. When one side of the large bag arm 1 applies pressure to the positioning ring 12, the corresponding pressure sensor detects the pressure value, and then the mechanical arm 4 moves toward the other side of the large bag arm 1, so that the large bag arm 1 contacts all the positioning rings 12. When the pressure sensors of all the positioning rings 12 detect the pressure value, the large bag arm 1 stops. The pressure sensor involved in the present invention is an existing conventional pressure sensor.

[0042] In the present invention, a rotating rod 14 that flips outward is provided on the outer top side of the calibration part 5, a docking slot 15 is provided on the outer end of the rotating rod 14, the length of the rotating rod 14 is greater than the height of the calibration cavity 18, and a locking bolt 16 that cooperates with the docking slot 15 is provided on the outer bottom side of the calibration part 5. The rotating rod 14 flips downward to the locking bolt 16, and the locking bolt 16 is embedded in the docking slot 15 of the rotating rod 14.

[0043] Specifically, when the hydraulic jack 7 applies pressure to the weighing sensor of the large bag arm 1, even with the limiting effect of the positioning pin 11, the large bag arm 1 may still slip outward along the direction of the positioning pin 11. Therefore, a rotating pull rod 14 is provided on one side of the calibration cavity 18. When the large bag arm 1 completely enters the calibration cavity 18, the rotating pull rod 14 flips downward and the locking bolt 16 is embedded in the docking slot 15 of the rotating pull rod 14 for fixation, thereby limiting the large bag arm 1 from slipping outward.

[0044] Furthermore, a flip motor 17 is provided on the top of the calibration part 5, and the output shaft of the flip motor 17 is connected to one end of the rotating rod 14, so as to drive the rotating rod 14 to flip downward or upward. The rotating rod 14 can be flipped automatically by the flip motor 17.

[0045] In the present invention, the hydraulic station 6, the pressure sensor and the flip motor 17 are all electrically connected to the controller, and the barrel controller performs control, wherein the controller is an existing conventional PLC controller, such as a Siemens S7-400 programmable logic controller.

[0046] The present invention also provides a method for using an online steelmaking plant continuous casting machine ladle weighing sensor calibration device, the specific steps of which are as follows:

[0047] A turret mechanism is provided at the bottom of the continuous casting machine, and two large ladle arms 1 are symmetrically arranged on both sides of the continuous casting machine. When one of the large ladle arms 1 is weighed, the other large ladle arm 1 is in an unloaded state. The mechanical arm 4 drives the calibration part 5 to approach the unloaded large ladle arm 1, so that the unloaded large ladle arm 1 enters the bottom of the calibration cavity 18 of the calibration part 5. At this time, the bottom of the large ladle arm 1 contacts the bottom of the calibration cavity 18, and moves into the calibration cavity 18 along the bottom of the calibration cavity 18. At the same time, the positioning pins 11 in the calibration cavity 18 are respectively inserted into the through holes 2 of the large ladle arm 1. When the large ladle arm 1 completely enters the calibration cavity 18, the mechanical arm 4 is stopped. At this time, the weighing sensor on the large ladle arm 1 is located directly below the hydraulic jack 7;

[0048] Start the flip motor 17 to flip the rotating rod 14 downward to the locking bolt 16, and the locking bolt 16 is embedded in the docking slot 15 of the rotating rod 14, and the large bag arm 1 is fixed in the calibration cavity 18;

[0049] The hydraulic station 6 drives the hydraulic jack 7 to apply a fixed pressure to the weighing sensor in the large bag arm 1, reads the real-time measurement value of the weighing sensor, and compares the real-time measurement value with the pressure applied by the hydraulic jack 7. If the real-time measurement value is greater than or less than the pressure applied by the hydraulic jack 7, the weighing sensor is calibrated. If the real-time measurement value is equal to the pressure applied by the hydraulic jack 7, it means that the weighing sensor is normal.

[0050] After the calibration is completed, the flip motor 17 is started again to flip the rotating pull rod 14 upward to the top of the calibration part 5, and the mechanical arm 4 is started to drive the calibration part 5 to leave the large bag arm 1;

[0051] After the subcontract is transferred, the original weighing big bag arm 1 is in an unloaded state, and the weighing sensor of the unloaded big bag arm 1 is calibrated.

[0052] In the process of the large bag arm 1 entering the calibration cavity 18, all the positioning pins 11 in the calibration cavity 18 are respectively inserted into the through holes 2 of the large bag arm 1. When the pressure sensors of all the positioning pins 11 detect pressure values, it means that the large bag arm 1 has moved into place and the robotic arm 4 is stopped.

[0053] Furthermore, in order to improve the accuracy of calibration, the hydraulic jack 7 applies pressure to the weighing sensor three times, with the same pressure applied each time. The values ​​measured three times by the weighing sensor are averaged, and the average value is compared with the average value of the three pressures applied by the hydraulic jack 7 to perform calibration.

[0054] It can be understood that the number of times the hydraulic jack 7 applies pressure to the weighing sensor is not limited to three times, and the pressure applied each time may also be different.

[0055] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An online calibration device for a ladle weighing sensor of a continuous casting machine in a steelmaking plant, characterized in that: It comprises a driving module arranged on one side of the large bag arm (1) and a calibration module arranged on the driving module; The driving module comprises a mechanical arm (4) and a calibration part (5), wherein the calibration part (5) is arranged at the top end of the mechanical arm (4), and a calibration cavity (18) is arranged inside the calibration part (5) for accommodating the large bag arm (1); The calibration module comprises a hydraulic station (6) and a hydraulic jack (7), the top rod (9) of the hydraulic jack (7) faces downward, and the bottom of the hydraulic jack (7) is fixedly connected to the top of the calibration chamber (18), the hydraulic station (6) is arranged outside the calibration part (5) and located on the mechanical arm (4), the hydraulic station (6) is connected to the hydraulic jack (7) through an oil pipe (8), and the inner side wall of the calibration chamber (18) is horizontally provided with a plurality of positioning pins (11) adapted to the through holes (2) of the large bag arm (1); The outer top side surface of the calibration part (5) is provided with an outwardly tilted rotating rod (14), the outer end of the rotating rod (14) is provided with a docking slot (15), the length of the rotating rod (14) is greater than the height of the calibration cavity (18), and the outer bottom side surface of the calibration part (5) is provided with a locking bolt (16) that cooperates with the docking slot (15), the rotating rod (14) is tilted downward to the locking bolt (16), and the locking bolt (16) is embedded in the docking slot (15) of the rotating rod (14); A flip motor (17) is provided at the top of the calibration portion (5); an output shaft of the flip motor (17) is connected to one end of the rotating pull rod (14) and is used to drive the rotating pull rod (14) to flip downward or upward; The method of using the online steel plant continuous casting machine ladle weighing sensor calibration device is as follows: A turret mechanism is provided at the bottom of the continuous casting machine. Two large ladle arms (1) are symmetrically arranged on both sides of the continuous casting machine. When one of the large ladle arms (1) is weighed, the other large ladle arm (1) is in an unloaded state. The mechanical arm (4) drives the calibration part (5) to approach the unloaded large ladle arm (1), so that the unloaded large ladle arm (1) enters the bottom of the calibration cavity (18) of the calibration part (5). At this time, the bottom of the large ladle arm (1) contacts the bottom of the calibration cavity (18) and moves into the calibration cavity (18) along the bottom of the calibration cavity (18). At the same time, the positioning pins (11) in the calibration cavity (18) are respectively inserted into the through holes (2) of the large ladle arm (1). When the large ladle arm (1) completely enters the calibration cavity (18), the mechanical arm (4) stops. At this time, the weighing sensor on the large ladle arm (1) is located directly below the hydraulic jack (7). Start the flip motor (17) to flip the rotating rod (14) downward to the locking bolt (16), the locking bolt (16) is embedded in the docking slot (15) of the rotating rod (14), and the large bag arm (1) is fixed in the calibration cavity (18); The hydraulic station (6) drives the hydraulic jack (7) to apply a fixed pressure to the weighing sensor in the large bag arm (1), reads the real-time measurement value of the weighing sensor, and compares the real-time measurement value with the pressure applied by the hydraulic jack (7). If the real-time measurement value is greater than or less than the pressure applied by the hydraulic jack (7), the weighing sensor is calibrated; if the real-time measurement value is equal to the pressure applied by the hydraulic jack (7), it means that the weighing sensor is normal; After the calibration is completed, the flip motor (17) is started again to flip the rotating pull rod (14) upward to the top of the calibration part (5), and the mechanical arm (4) is started to drive the calibration part (5) away from the large bag arm (1); After the subcontract is transferred, the original weighing arm (1) is in an empty state, and the weighing sensor of the empty weighing arm (1) is calibrated; When the large bag arm (1) enters the calibration chamber (18), all the positioning pins (11) in the calibration chamber (18) are respectively inserted into the through holes (2) of the large bag arm (1). When the pressure sensors of all the positioning pins (11) detect pressure values, it means that the large bag arm (1) has moved into place and the mechanical arm (4) is stopped.

2. The on-line steelmaking plant continuous casting machine ladle weighing sensor calibration device as claimed in claim 1, characterized in that: A positioning ring (12) is provided at one end of the positioning pin (11) close to the calibration cavity (18), and a buffer layer (13) is provided on an outwardly facing side of the positioning ring (12).

3. The on-line steelmaking plant continuous casting machine ladle weighing sensor calibration device as claimed in claim 2, characterized in that: The number of the positioning pins (11) is at least two, and the positioning pins (11) are symmetrically distributed.

4. The on-line steelmaking plant continuous casting machine ladle weighing sensor calibration device as claimed in claim 1, characterized in that: The push rod (9) of the hydraulic jack (7) is provided with a pressure plate (10), and the area of ​​the pressure plate (10) is smaller than the area of ​​the base (3) of the weighing sensor.

5. The on-line steelmaking plant continuous casting machine ladle weighing sensor calibration device as claimed in claim 2, characterized in that: A pressure sensor is also provided between the buffer layer (13) and the positioning ring (12).

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