A detection and maintenance device and method for a long nozzle clamp of a continuous casting machine

Abstract

The present invention discloses a detection and maintenance device for a long nozzle clamp of a continuous casting machine, comprising a bracket, an upper pressure mechanism, and a force measuring unit. The bracket comprises a base plate, an annular support plate, and several support columns arranged on the base plate. The annular support plate is arranged above the base plate via the support columns. The upper surface of the annular support plate is provided with several hanging feet that match the screw buckles of the upper half of the clamp. The upper pressure mechanism is arranged on the base plate and is used to press the lower half of the clamp upward. The force measuring system is used to detect the pressure between the upper pressure mechanism and the lower half of the clamp in real time. The present invention also discloses a detection and maintenance method. The present invention enables maintenance personnel to quickly detect and maintain the clamp without removing the spring, thereby improving the maintenance efficiency of the clamp.

Description

Technical Field

[0001] The invention relates to a long shroud of a continuous casting machine, and in particular to a detection and maintenance device and method for a long shroud clamp of a continuous casting machine. Background Art

[0002] It has become a trend in continuous casting operations to use robots to disassemble and assemble the shroud from the ladle to replace manual labor. The robot's function of disassembling and assembling the shroud is achieved through a clamp. The structure of the shroud clamp is as follows: Figures 1-2 As shown, the clamp consists of two main parts: the upper part 1 is a screw-knob that can be hung on the ladle's sliding nozzle mechanism by rotation; the lower part 2 is used to accommodate the shroud and position the nozzle. The upper and lower parts are connected by four preloaded springs 3. When the robot screws the clamp onto the ladle, the screw-knob 4 of the upper part 1 gradually screws into the hanging leg of the ladle mechanism as the screwing action progresses. The four springs 3 are gradually compressed, ensuring sufficient pressure between the shroud and the ladle outlet, preventing spitting out of molten steel when the ladle is poured and preventing secondary oxidation of the molten steel.

[0003] In actual production, after long-term use, the clamp often experiences spring failure or compression difficulties due to poor lubrication. This can lead to problems such as sprue sprue or nozzle failure during pouring, seriously impacting normal production. Therefore, it is crucial to promptly inspect and maintain the clamp, especially to properly lubricate and maintain the springs and regularly inspect their elastic properties.

[0004] Currently, the only available offline spring inspection tool for shroud holder maintenance is a spring test tool. This tool requires the springs to be removed from the holder before testing the elastic properties of each spring individually. This is a cumbersome process and has a limited detection range. Furthermore, lubrication and maintenance of the springs in the holder require lubrication of the spring support rod between the upper and lower parts of the holder, as the upper and lower parts are clamped by the springs in the normal assembly state. This also requires the springs to be removed from the holder before lubrication can be performed, making it impossible to perform timely maintenance of the holder during production cycles. Summary of the Invention

[0005] In order to solve the above problems in the prior art, the present invention provides a detection and maintenance device and method for the long nozzle clamp of a continuous casting machine, which enables maintenance personnel to quickly detect and maintain the clamp without removing the spring, thereby improving the maintenance efficiency of the clamp.

[0006] On the one hand, a detection and maintenance device for a long water nozzle clamp of a continuous casting machine includes a bracket, an upper pressure mechanism, and a force measuring unit. The bracket includes a base plate, an annular support plate and several support columns arranged on the base plate. The annular support plate is arranged above the base plate through the support columns. The upper surface of the annular support plate is provided with several hanging feet that match the rotary buckles of the upper half of the clamp; the upper pressure mechanism is arranged on the base plate to press the lower half of the clamp upward; the force measuring system is used to detect the pressure between the upper pressure mechanism and the lower half of the clamp in real time.

[0007] The upper pressure mechanism includes a hydraulic jack and a top plate. The bottom of the hydraulic jack is fixed in the middle of the base plate, the piston rod of the hydraulic jack faces upward, the lower end of the top plate is arranged on the top of the piston rod, and the upper end of the top plate is against the step of the lower half of the clamp.

[0008] The lower end of the top plate is provided with a ring sleeve that matches the top of the piston rod. The ring sleeve is sleeved on the top of the piston rod, and a row of linear notches is also provided on the side wall of the ring sleeve.

[0009] The force measuring system includes a pressure sensor and a display unit. The pressure sensor is arranged in the ring sleeve and located between the top plate and the top of the piston rod. The data line of the pressure sensor passes through the cable notch and is connected to the display unit.

[0010] The piston rod is provided with a scale.

[0011] On the other hand, a method for detecting and maintaining a device for detecting and maintaining a long nozzle clamp of a continuous casting machine includes the following steps:

[0012] a. Place the clamp upside down on the annular support plate of the inspection and maintenance device, and screw the buckle on the upper part of the clamp into the hanging foot;

[0013] b. Drive the piston rod upward until the top plate contacts the step on the lower half of the gripper. Record the pressure value obtained on the display unit and the extension of the piston rod at this time.

[0014] c. Drive the piston rod to continue to push upward, compressing the clamp spring and separating the upper and lower parts of the clamp until the spring compression reaches the predetermined value. Then stop and record the pressure value obtained by the display unit at this time.

[0015] d. Compare the recorded pressure value with the spring usage standard to determine whether the spring meets the usage requirements.

[0016] In step c, lubrication maintenance is also performed on the connecting rod between the upper and lower parts of the separated clamp.

[0017] By adopting the inspection and maintenance device and method of the long nozzle clamp of the continuous casting machine of the present invention, the performance of the clamp can be quickly and timely checked and lubrication maintenance operations can be performed without disassembling the clamp spring, which can effectively reduce the maintenance intensity of the clamp, improve the inspection and maintenance efficiency, and ensure the stable performance of the clamp in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of a shroud holder in the prior art;

[0019] Figure 2 A sectional view of a shroud holder in the prior art;

[0020] Figure 3 It is a structural schematic diagram of the detection and maintenance device of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the force measuring unit of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the top plate of the present invention;

[0023] Figure 6 This is a schematic diagram of the use status of the detection and maintenance device of the present invention;

[0024] Figure 7 This is a cross-sectional view of the detection and maintenance device of the present invention in use.

[0025] In the figure, there are the upper part 1 of the clamp, the lower part 2 of the clamp, the spring 3, the buckle 4, the base plate 5, the support plate 6, the support column 7, the hanging foot 8, the hydraulic jack 9, the top plate 10, the ring sleeve 11, the cable notch 12, the pressure sensor 13, and the display unit 14. DETAILED DESCRIPTION

[0026] The following further describes a detection and maintenance device for a long nozzle holder of a continuous casting machine in conjunction with the accompanying drawings and embodiments of the present invention.

[0027] like Figures 3-5As shown, the inspection and maintenance device of the long water nozzle clamp of the continuous casting machine of the present invention mainly includes a bracket, an upper pressure mechanism, and a force measuring unit. The bracket includes a disc-shaped bottom plate 5, an annular support plate 6 and several support columns 7 arranged on the bottom plate 5. The support plate 6 is arranged above the bottom plate 5 through the support columns 7. The upper surface of the support plate 6 is provided with several hanging feet 8 that match the screw buckle 4 of the upper half 1 of the clamp. After the screw buckle 4 of the clamp is screwed in, the upper half 1 of the clamp can be fixed; the upper pressure mechanism is fixed on the bottom plate 5, and is used to pass through the support plate 6 to press the lower half 2 of the clamp upward, and is used to compress the spring 3 and separate the upper and lower parts 1 and 2 of the clamp, so as to facilitate maintenance operations during detection; the force measuring system is used to detect the pressure between the upper pressure mechanism and the lower half of the clamp in real time.

[0028] As an embodiment, the upward pressure mechanism includes a hydraulic cylinder (a hydraulic jack 9 can be used) and a top plate 10. The bottom of the hydraulic jack 9 can be fixed to the middle of the base plate 5 by welding or other means. The piston rod of the hydraulic jack 9 faces upward, and the lower end of the top plate 10 is arranged at the top of the piston rod. The upper end of the top plate 10 is against the step of the lower half 2 of the clamp. The top plate 10 can ensure stability during contact and lifting with the lower half 2 of the clamp.

[0029] As an embodiment, a ring sleeve 11 matching the top of the piston rod is provided at the lower end of the top plate 10 , which is sleeved on the top of the piston rod, and a row of linear notches 12 are also provided on the side wall of the ring sleeve 11 .

[0030] As an embodiment, the force measuring system includes a pressure sensor 13 and a display unit 14. The pressure sensor 13 is arranged in the ring sleeve 11 and is located between the top plate 10 and the top of the piston rod. The data line of the pressure sensor 13 passes through the above-mentioned cable notch 12 and is connected to the display unit 14. The pressure sensor 13 can measure the upward pressure data of the piston rod in real time and read the data on the display unit 14.

[0031] As an embodiment, the piston rod is provided with a scale to facilitate the control and recording of its lifting stroke, that is, the compression amount of the spring 3.

[0032] The detection and maintenance method of the detection and maintenance device for the long nozzle clamp of the continuous casting machine using the present invention specifically comprises the following steps:

[0033] Please combine Figures 6-7 As shown, before operation, first, ensure that the hydraulic jack 9, pressure sensor 13 and top plate 10 are well assembled and coaxial along the axis of the bracket, ensure that the display unit 14 is in the open state, and ensure that the hydraulic valve of the hydraulic jack 9 is locked and the piston rod is not extended. During operation:

[0034] a. First, place the clamp upside down on the annular support plate 6 of the detection and maintenance device, and screw the buckle of the upper half of the clamp into the hanging foot 8;

[0035] b. Then drive the piston rod upward until the top plate 10 contacts the step of the lower half of the clamp, and record the pressure value obtained by the display unit 14 and the extension of the piston rod;

[0036] c. Then, the piston rod is driven upward to compress the clamp spring and separate the upper and lower parts of the clamp until the spring compression reaches a predetermined value. The pressure value obtained by the display unit 14 is recorded. Of course, during this step, the connecting rod between the upper and lower parts of the clamp can also be lubricated as needed to ensure the performance of the clamp.

[0037] d. Then compare the recorded pressure value with the spring usage standard to determine whether the spring meets the usage requirements;

[0038] After completing the above inspection and maintenance, it is only necessary to open the hydraulic valve, and the hydraulic jack 9 gradually releases pressure to gradually restore the clamp to its original state, and then press the piston rod to the non-extended state to remove the clamp.

[0039] In summary, the detection and maintenance device and method of the long nozzle clamp of the continuous casting machine of the present invention can enable maintenance personnel to quickly detect and maintain the clamp in a timely manner without removing the spring, thereby improving the maintenance efficiency of the clamp.

[0040] However, those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A method for inspecting and maintaining a shroud holder of a continuous casting machine, which can quickly inspect and maintain the holder without removing the spring, uses a device for inspecting and maintaining a shroud holder of a continuous casting machine, the device comprising: The bracket, the upper pressing mechanism, and the force measuring unit are composed of a base plate, an annular support plate, and several support columns arranged on the base plate. The annular support plate is arranged above the base plate through the support columns. The upper surface of the annular support plate is provided with several hanging feet that match the rotary buckles of the upper half of the clamp; the upper pressing mechanism is arranged on the base plate to press the lower half of the clamp upward; the force measuring system is used to detect the pressure between the upper pressing mechanism and the lower half of the clamp in real time. The method is characterized in that: a. Place the clamp upside down on the annular support plate of the inspection and maintenance device, and screw the buckle on the upper part of the clamp into the hanging foot; b. Drive the piston rod upward until the top plate contacts the step on the lower half of the gripper. Record the pressure value on the display unit and the extension of the piston rod at this time. c. Continue to push the piston rod upward, compressing the clamp spring and separating the upper and lower parts of the clamp until the spring compression reaches the predetermined value. Record the pressure value on the display unit at this time. d. Compare the recorded pressure value with the spring usage standard to determine whether the spring meets the usage requirements.

2. The method for detecting and maintaining a shroud holder of a continuous casting machine according to claim 1, wherein: In step c, lubrication maintenance is also performed on the connecting rod between the upper and lower parts of the separated clamp.

3. A detection and maintenance device for a continuous casting machine shroud holder used in the detection and maintenance method for a continuous casting machine shroud holder according to claim 1 or 2, characterized in that: It includes a bracket, an upper pressing mechanism, and a force measuring unit. The bracket includes a base plate, an annular support plate and several support columns arranged on the base plate. The annular support plate is arranged above the base plate through the support columns. The upper surface of the annular support plate is provided with several hanging feet that match the rotary buckles of the upper part of the clamp; the upper pressing mechanism is arranged on the base plate to press the lower part of the clamp upward; the force measuring system is used to detect the pressure between the upper pressing mechanism and the lower part of the clamp in real time.

4. The detection and maintenance device for the long nozzle holder of a continuous casting machine according to claim 3, characterized in that: The upper pressure mechanism includes a hydraulic jack and a top plate. The bottom of the hydraulic jack is fixed in the middle of the base plate, the piston rod of the hydraulic jack faces upward, the lower end of the top plate is arranged on the top of the piston rod, and the upper end of the top plate is against the step of the lower half of the clamp.

5. The detection and maintenance device for the long nozzle holder of a continuous casting machine according to claim 4, characterized in that: The lower end of the top plate is provided with a ring sleeve that matches the top of the piston rod. The ring sleeve is sleeved on the top of the piston rod, and a row of linear notches is also provided on the side wall of the ring sleeve.

6. The detection and maintenance device for the long nozzle holder of a continuous casting machine according to claim 5, characterized in that: The force measuring system includes a pressure sensor and a display unit. The pressure sensor is arranged in the ring sleeve and located between the top plate and the top of the piston rod. The data line of the pressure sensor passes through the cable notch and is connected to the display unit.

7. The detection and maintenance device for the long nozzle holder of a continuous casting machine according to claim 3, characterized in that: The piston rod is provided with a scale.

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