Protective device for tundish stopper rod

Abstract

A protection device for a tundish stopper rod comprises an anti-erosion sleeve, a lifting part, a first infrared distance meter and a jumping part. A stopper rod is fixed at the end part of the stopper rod mechanism cross beam; the first infrared distance meter is arranged on the lower end face of a cross beam of the stopper mechanism; the lifting part is arranged on the upper end face of a cross beam of the stopper mechanism, and the jumping part is arranged on the lifting part. The anti-erosion sleeve is arranged on the jumping part; the anti-erosion sleeve is arranged outside the stopper rod in a sleeving manner; the signal output end of the first infrared distance meter is connected with the signal input end of the CPU. According to the utility model, the part of the stopper, which is positioned at the junction of molten steel and steel slag, is effectively protected, and the service life of the stopper is prolonged.

Description

Technical Field

[0001] The utility model relates to a protection device, in particular to a device capable of carrying out targeted protection on a stopper rod at the junction of molten steel and slag, belonging to the technical field of tundish stopper rod protection equipment. Background Art

[0002] The stopper rod is a common refractory material in the modern continuous casting process. It is collectively referred to as the "three major parts" of continuous casting together with the long nozzle and the submerged nozzle. The main function of the stopper rod is to control the flow of molten steel into the crystallizer by adjusting its position above and below the tundish, thereby achieving the matching of pulling speed and flow rate. During the continuous casting process, the stopper rod must keep pace with the life of the tundish. At present, the pull-down and heat exchange caused by the stopper rod account for a large proportion. Improving the life of the stopper rod is crucial to improving the operating efficiency of the continuous casting machine. When in use, the stopper rod can be roughly divided into three areas, one part is immersed below the molten steel surface, one part is exposed above the molten steel surface, and one part is located at the interface between the steel and slag. Among them, the reaction at the interface between the steel and slag is fierce, which makes the stopper rod located at The junction part is seriously corroded, which seriously affects the service life of the stopper rod. At present, in order to solve this problem, various manufacturers use combined stopper rods, that is, the stopper rod located at the slag line is made of magnesium carbon or zirconium carbon material, and the rest of the part is made of aluminum carbon material. The disadvantage is that the thermal expansion coefficients of the two materials are different and they are easy to break. Another part of the manufacturers uses an integral aluminum carbon material, and then adds a zirconium carbon coating or a bonding slider at the slag line. The disadvantage is that during use, the coating or the slider is at risk of falling off, and the thickness of the zirconium carbon material is limited, and the corrosion resistance is poor. Therefore, a reliable protective device is needed, which is required to effectively protect the part of the stopper rod at the slag line, thereby extending the service life of the stopper rod. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a protection device for a tundish stopper rod, which can effectively protect the part of the stopper rod located at the slag line, thereby extending the service life of the stopper rod.

[0004] The problem described in the utility model is solved by the following technical solutions:

[0005] A protective device for a tundish stopper rod comprises an anti-corrosion sleeve, a lifting part, a first infrared rangefinder and a jumping part; a stopper rod is fixed to the end of a stopper rod mechanism crossbeam; the first infrared rangefinder is arranged on the lower end surface of the stopper rod mechanism crossbeam; the lifting part is arranged on the upper end surface of the stopper rod mechanism crossbeam, and the jumping part is arranged on the lifting part; the anti-corrosion sleeve is arranged on the jumping part; the anti-corrosion sleeve is sleeved on the outside of the stopper rod; the signal output end of the first infrared rangefinder is connected to the signal input end of the CPU.

[0006] The above-mentioned protective device for the tundish stopper rod comprises a lifting part motor, a lead screw, a lead screw nut, a horizontal support plate and a lifting block; the motor housing is arranged on the upper end surface of the cross beam of the stopper mechanism; the horizontal support plate is arranged on the upper end surface of the cross beam of the stopper mechanism through a bracket, and the horizontal support plate is located directly above the motor; the motor output shaft is connected to one end of the lead screw, and the other end of the lead screw is axially connected to the horizontal support plate; the lead screw nut is arranged on the lead screw, and the lifting block is arranged on the lead screw nut; the signal input end of the motor is connected to the signal output end of the CPU.

[0007] The above-mentioned protective device for the middle package stopper rod, the jumping part includes a cylinder, a lifting plate, a guide rod and a vertical rod; a horizontal support rod is provided at one end of the stopper rod crossbeam of the stopper rod mechanism, and guide holes are provided at both ends of the support rod, and two vertical rods are respectively penetrated by the guide holes at both ends of the support rod; the bottom end of the vertical rod is connected to the top end of the anti-corrosion casing, and the top end of the vertical rod is connected to the lower end surface of the lifting plate; a second infrared rangefinder is provided on the upper end surface of the stopper rod mechanism crossbeam, and the second infrared rangefinder is located directly below the lifting plate; guide rods are provided at both ends of the upper end surface of the lifting plate, and guide holes are provided at both ends of the lower end surface of the lifting block, and the two guide rods are respectively penetrated by the guide holes of the lifting block corresponding to their positions; the cylinder is provided on the upper end surface of the lifting block, and the cylinder piston rod penetrates the lifting block and is connected to the lifting plate; the signal output end of the second infrared rangefinder is connected to the signal input end of the CPU; the signal input end of the cylinder is connected to the signal output end of the CPU.

[0008] In the protective device for the tundish plug rod, the center lines of the guide rod, the vertical rod and the lead screw are parallel; the axis line of the cylinder piston rod is parallel to the center line of the guide rod.

[0009] The utility model maintains the anti-corrosion sleeve at the junction of the slag layer and the molten steel layer, thereby reducing the corrosion effect of the junction on the stopper rod body as much as possible; the position of the junction is determined by a first infrared rangefinder, thereby ensuring that the anti-corrosion sleeve can accurately stay at the junction; the anti-corrosion sleeve is driven to rise and fall by a lifting part, thereby maintaining the position of the junction. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0011] The list of reference numerals in the figure is: 1. Anti-corrosion casing, 2. Stopper mechanism crossbeam, 3. First infrared rangefinder, 4. Motor, 5. Lead screw nut, 6. Lifting block, 7. Cylinder, 8. Lifting plate, 9. Vertical rod, 10. Stopper. DETAILED DESCRIPTION

[0012] See also Figure 1The utility model comprises an anti-corrosion sleeve 1, a lifting part, a first infrared rangefinder 3 and a jumping part; the anti-corrosion sleeve 1 has stronger corrosion resistance than the stopper rod body, and the anti-corrosion sleeve 1 accepts the corrosion from the junction on behalf of the stopper rod, thereby extending the service life of the stopper rod; the lifting part is used to adjust the position of the anti-corrosion sleeve 1 to ensure that it stays at the junction; the jumping part is used to drive the anti-corrosion sleeve 1 to move slightly in the vertical direction to prevent the junction from repeatedly corroding the same part of the anti-corrosion sleeve 1.

[0013] A stopper rod 10 is fixed to the end of the stopper rod mechanism cross beam 2; the first infrared rangefinder 3 is arranged on the lower end surface of the stopper rod mechanism cross beam 2; the first infrared rangefinder 3 can monitor the distance between it and the slag surface, and the thickness of the slag layer is certain, so the relative position of the junction can be known by the data detected by the first infrared rangefinder 3 plus the known thickness of the slag layer; the lifting part is arranged on the upper end surface of the stopper rod mechanism cross beam 2, and the jumping part is arranged on the lifting part; the anti-corrosion sleeve 1 is arranged on the jumping part; the anti-corrosion sleeve 1 is sleeved on the outside of the stopper rod 10; the signal output end of the first infrared rangefinder 3 is connected to the signal input end of the CPU.

[0014] The lifting part comprises a motor 4, a lead screw, a lead screw nut 5, a horizontal support plate and a lifting block 6; the housing of the motor 4 is arranged on the upper end surface of the cross beam 2 of the stopper mechanism; the horizontal support plate is arranged on the upper end surface of the cross beam 2 of the stopper mechanism through a bracket, and the horizontal support plate is located directly above the motor 4; the output shaft of the motor 4 is connected to one end of the lead screw, and the other end of the lead screw is axially connected to the horizontal support plate; the motor 4 can drive the lead screw to rotate, and then drive the lead screw nut to move along the axial center line direction of the lead screw; the lead screw nut 5 is arranged on the lead screw, and the lifting block 6 is arranged on the lead screw nut 5; the lifting block 6 moves synchronously with the lead screw nut 5; the signal input end of the motor 4 is connected to the signal output end of the CPU.

[0015] The jumping part includes a cylinder 7, a lifting plate 8, a guide rod and a vertical rod 9; a horizontal support rod is provided at one end of the stopper mechanism crossbeam 2 close to the stopper rod 10, and guide holes are provided at both ends of the support rod, and two vertical rods 9 are respectively penetrated by the guide holes at both ends of the support rod; the bottom end of the vertical rod 9 is connected to the top end of the anti-erosion sleeve 1, and the top end of the vertical rod 9 is connected to the lower end surface of the lifting plate 8; the vertical rod 9 provides a guiding effect for the lifting and lowering of the anti-erosion sleeve 1; a second infrared rangefinder is provided on the upper end surface of the crossbeam 2 of the stopper mechanism, and the second infrared rangefinder is located directly below the lifting plate 8; the second infrared rangefinder can measure the relative position of the lifting plate 8, and the length of the vertical rod 9 is fixed, so the position of the anti-erosion sleeve 1 can be converted, so the position of the anti-erosion sleeve 1 at the junction of the slag layer and the anti-erosion sleeve 1 Under the known conditions, the anti-corrosion sleeve 1 can be driven to move to the junction of the slag layer through the action of the motor, which has a good isolation effect for the stopper rod; guide rods are provided at both ends of the upper end surface of the lifting plate 8, and guide holes are provided at both ends of the lower end surface of the lifting block 6, and the two guide rods are respectively penetrated through the guide holes of the lifting block 6 corresponding to their positions; the guide rods play a guiding role in the lifting and lowering of the lifting plate 8; the cylinder 7 is arranged on the upper end surface of the lifting block 6, and the piston rod of the cylinder 7 penetrates the lifting block 6 and is connected to the lifting plate 8; the cylinder 7 can drive the lifting plate 8 to rise and fall, and the lifting plate 8 synchronously drives the anti-corrosion sleeve 1 to move vertically back and forth through the vertical rod 9; the signal output end of the second infrared rangefinder is connected to the signal input end of the CPU; the signal input end of the cylinder 7 is connected to the signal output end of the CPU.

[0016] The center lines of the guide rod, the vertical rod 9 and the lead screw are parallel; the axis line of the piston rod of the cylinder 7 is parallel to the center line of the guide rod.

[0017] The model of the CPU module in the utility model is 87C196KC.

[0018] Actual use process: During use, the first infrared rangefinder 3 monitors the distance from the surface of the slag layer in real time. Since the thickness of the slag layer is basically determined, the position of the junction of the slag layers can be known; and the second infrared rangefinder can convert the relative position of the anti-erosion sleeve 1, and through the cooperation of the second infrared rangefinder and the motor 4, the anti-erosion sleeve 1 is controlled to move up and down to the junction of the slag layer; this is a dynamic process. Once the slag layer changes, the anti-erosion sleeve 1 moves with it, in order to ensure that the anti-erosion sleeve 1 can be at the junction of the slag layer to provide protection for the stopper rod; during this period, the cylinder 7 drives the anti-erosion sleeve 1 to float slightly vertically upward, in order to avoid continuous corrosion of the same circle of the anti-erosion sleeve 1 at the junction of the slag layer, so that the anti-erosion sleeve 1 can be used for as long as possible to extend its service life.

Claims

1. A protective device for a tundish plug rod, characterized in that: The invention comprises an anti-corrosion sleeve (1), a lifting part, a first infrared rangefinder (3) and a jumping part; a stopper rod (10) is fixed to the end of a stopper rod mechanism cross beam (2); the first infrared rangefinder (3) is arranged on the lower end surface of the stopper rod mechanism cross beam (2); the lifting part is arranged on the upper end surface of the stopper rod mechanism cross beam (2), and the jumping part is arranged on the lifting part; the anti-corrosion sleeve (1) is arranged on the jumping part; the anti-corrosion sleeve (1) is sleeved on the outside of the stopper rod (10); and the signal output end of the first infrared rangefinder (3) is connected to the signal input end of the CPU.

2. The protection device for the tundish plug rod according to claim 1, characterized in that: The lifting part comprises a motor (4), a lead screw, a lead screw nut (5), a horizontal support plate and a lifting block (6); the housing of the motor (4) is arranged on the upper end surface of the cross beam (2) of the stopper mechanism; the horizontal support plate is arranged on the upper end surface of the cross beam (2) of the stopper mechanism through a bracket, and the horizontal support plate is located directly above the motor (4); the output shaft of the motor (4) is connected to one end of the lead screw, and the other end of the lead screw is axially connected to the horizontal support plate; the lead screw nut (5) is arranged on the lead screw, and the lifting block (6) is arranged on the lead screw nut (5); the signal input end of the motor (4) is connected to the signal output end of the CPU.

3. The protection device for the tundish plug rod according to claim 2, characterized in that: The jumping part comprises a cylinder (7), a lifting plate (8), a guide rod and a vertical rod (9); a horizontal support rod is arranged at one end of the stopper rod mechanism cross beam (2) close to the stopper rod (10), and guide holes are arranged at both ends of the support rod, and the two vertical rods (9) are respectively penetrated by the guide holes at both ends of the support rod; the bottom end of the vertical rod (9) is connected to the top end of the anti-corrosion casing (1), and the top end of the vertical rod (9) is connected to the lower end surface of the lifting plate (8); a second infrared rangefinder is arranged on the upper end surface of the stopper rod mechanism cross beam (2), and the second infrared rangefinder is located at the bottom of the stopper rod mechanism cross beam (2). Directly below the lifting plate (8); both ends of the upper end surface of the lifting plate (8) are provided with guide rods, and both ends of the lower end surface of the lifting block (6) are provided with guide holes, and the two guide rods are respectively penetrated through the guide holes of the lifting block (6) corresponding to their positions; the cylinder (7) is arranged on the upper end surface of the lifting block (6), and the piston rod of the cylinder (7) penetrates the lifting block (6) and is connected to the lifting plate (8); the signal output end of the second infrared rangefinder is connected to the signal input end of the CPU; the signal input end of the cylinder (7) is connected to the signal output end of the CPU.

4. The protection device for the tundish plug rod according to claim 3, characterized in that: The center lines of the guide rod, the vertical rod (9) and the lead screw are parallel; the axis line of the piston rod of the cylinder (7) is parallel to the center line of the guide rod.

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