CN108687322B - Online roll gap instrument for slab continuous casting - Google Patents
Online roll gap instrument for slab continuous casting Download PDFInfo
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- CN108687322B CN108687322B CN201710224874.9A CN201710224874A CN108687322B CN 108687322 B CN108687322 B CN 108687322B CN 201710224874 A CN201710224874 A CN 201710224874A CN 108687322 B CN108687322 B CN 108687322B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
Abstract
The invention discloses an online roll gap instrument for continuous casting of a plate blank, which comprises a box body, a roll gap detection mechanism, a radian detection mechanism, a horizontal position switch, a vertical position switch and a controller, wherein the box body is provided with a plurality of grooves; the box body is respectively provided with a seam measuring elongated slot and an arc aligning elongated slot, the controller is arranged in the box body, and the horizontal position switch and the vertical position switch are arranged in the box body and are vertically arranged; the roll gap detection mechanism and the radian detection mechanism are arranged in the box body, a left spherical measuring head, a right spherical measuring head and a counter arc plate extend out of the box body to realize detection of the roll gap and the radian, the angle encoder, the inclination angle sensor and the temperature measurement sensor transmit detected roll gap and radian information to the controller, and the controller transmits corresponding data to the upper computer. The roll gap instrument realizes the tracking detection of the roll gap and radian states of the continuous casting machine, improves the detection precision, does not need manual operation and intervention, creates conditions for the rapid adjustment of the roll gap and other parameters of the continuous casting machine, prolongs the service life of sector equipment, and ensures the continuous and normal production of the continuous casting machine.
Description
Technical Field
The invention relates to the field of continuous casting machine equipment and process control, in particular to a slab continuous casting online roll gap instrument, which realizes roll gap detection, radian detection and management of a continuous casting machine in a continuous casting production process.
Background
The roll gap value and the camber value of the slab continuous casting are two most important parameters of a continuous casting machine, the control of quality defects such as central cracks, segregation, triangular region cracks, internal cracks and transverse corner cracks of a casting blank is directly influenced, and abnormal roll gaps and radians are also main reasons for causing the low service life, abnormal damage and even serious accidents such as slab stagnation of main equipment of the continuous casting machine such as a fan-shaped section. However, because the casting machine is connected by a long series of segment devices, each segment comprises a plurality of rollers, although the devices are assembled and adjusted in a centering way in an off-line way, different segments are different in structure, different in roll gap control principle and severe working condition environment, so that various problems causing abnormal roll gap are easy to occur in the production process, such as abnormal or accumulated errors of sensors for controlling the roll gap, abrasion of the surface of the rollers, deformation of a frame structure and the like; meanwhile, as the radian of the basic accuracy of the continuous casting machine, namely the arrangement between the fan-shaped sections, the arrangement relation between the rollers in the fan-shaped sections can be deviated and deteriorated due to the factors such as abnormal roller bearings, abnormal installation, abnormal operation in the production process and the like. Therefore, controlling the roll gap and camber of continuous casting machines has been a major concern for routine management and maintenance. Particularly, with the application of technologies such as soft reduction, large reduction and the like of a continuous casting machine, the use of a hydraulic sector is more and more common, the structure of the sector is particularly complex for the purposes of protecting a roll gap control oil cylinder and realizing dynamic control of the roll gap in the casting process, the structure for controlling the roll gap is also often composed of multiple components, the influence of gaps among the components on the control precision of the roll gap is large, and the control precision is very difficult to confirm and process by common means, so that a roll gap instrument is generally equipped as a trend management tool for the roll gap and the radian of the continuous casting machine besides daily manual measurement and adjustment.
At present, various types of roll gap instruments are various, related technologies are mainly divided into two major types, one type is a multifunctional continuous casting machine diagnostic instrument replacing a dummy bar head type, the diagnostic instrument generally has the functions of continuous casting machine roll gap detection, radian detection, casting roll rotation detection, casting roll deflection detection, secondary cooling spray water state detection and the like, and meanwhile, the roll gap instrument controls 2-3 groups of spring plates through an internal hydraulic or electric control pump so that the roll gap instrument always keeps the posture basically close to an outer arc when passing through each part of a continuous casting machine, wherein an LVDT displacement sensor is adopted for detecting the roll gap, an inclination angle sensor or an angle instrument is adopted for detecting the radian, a rotation sensor is adopted for detecting the rotation of the casting roll, a sonar sensor is adopted for detecting the secondary cooling spray water state, and the ratios of a plurality of displacement sensors for measuring the roll gap are adopted for detecting the deflection of the casting roll for calculation. The roll gap meter is mainly manufactured by Vickers (WIEGARD) in Germany, Sakrard (SARCLAD) in England, Baowei (POWER) in Korea, Beijing Metasey in China and the like, and when the roll gap meter is used, a dummy bar head for normally-open casting needs to be replaced by the roll gap meter, and the detection of a continuous casting machine is completed through the circulation of the dummy bar under the condition of non-production. The second type is an online roll gap meter represented by the japanese pacific industry, which is a single-function roll gap meter mainly detecting the distance between an upper roller and a lower roller by an angle sensor through a scissor-fork type measuring arm, is installed on a link of a dummy bar, can detect the roll gap condition of a continuous casting machine in the casting-on or dummy bar circulating process of the continuous casting machine, is convenient to use, does not need to be stopped for detection, and does not influence the normal production of the continuous casting machine.
The roll gap instrument brings great benefits to the management of the continuous casting machine, and the first kind of roll gap instrument is also applied to domestic slab continuous casting in a large quantity, so that convenience is brought to the grasping and maintenance management of the state of the continuous casting machine. However, there are many problems in general, mainly including the following:
1) the roll gap gauge has a complex structure, is difficult to maintain and is expensive. For example, oil leakage of an oil film oil pump supporting a spring plate often occurs in a roll gap instrument of the WIEGARD (WIEGARD) company, so that an expansion spring for maintaining the posture of the roll gap instrument cannot be expanded, and the roll gap instrument cannot be applied; LVDT displacement sensors used in roll gap gauges often fail during operation. The second type of roll gap instrument using the angle sensor is affected by the problems of deformation of a mechanical main shaft, damage of the angle instrument, sealing failure and the like caused by easy collision, and has expensive maintenance cost which is dozens of or millions of times;
2) the installation and the use are inconvenient, and the normal production of a continuous casting machine is influenced; the detection of a continuous casting machine by using a substituted dummy bar head type roll gap instrument relates to a large amount of manual operation, the dummy bar head on a dummy bar needs to be replaced by the roll gap instrument, and then the circular detection operation is carried out when the continuous casting machine is not produced; before circulation, strong cooling of the continuous casting machine is carried out for a certain time to prevent the internal instruments and sealing elements of the roll gap gauge from being damaged; when some continuous casting machines are detected, the main control program of the continuous casting machine is required to be modified to prevent the roll gap instrument from being damaged; the protection, the starting, the data receiving and the like of the roll gap instrument all need manual operation; generally, a one-time continuous casting machine needs to be stopped for 2-3 hours in a circulation measurement mode, so that the continuous production characteristic of the continuous casting machine is greatly influenced;
3) the detection precision of the roll gap meters is seriously influenced by the problems in the detection principle, so that the roll gap meters can only be used as auxiliary means for roll gap trend management; because the expansion spring of the roll gap instrument of the displacement sensor can only eliminate the relatively fixed gap between the roll bearings on the fan-shaped section and can not eliminate the frame gap with larger variation, the roll gap instrument can only detect the minimum cold roll gap value of the continuous casting machine and can not detect the real roll gap closer to the hot roll gap at the present that the hydraulic fan-shaped section is widely used, and a certain blind area can be brought to the tracking and management of the state of the continuous casting machine.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an online roll gap instrument for slab continuous casting, which overcomes the defects of roll gap and radian detection of the traditional continuous casting machine, realizes tracking detection of the roll gap and radian states of the continuous casting machine, improves the detection precision, does not need manual operation and intervention, creates conditions for rapid adjustment of parameters such as the roll gap of the continuous casting machine, and the like, simultaneously prolongs the service life of equipment at a sector section, and ensures continuous and normal production of the continuous casting machine.
In order to solve the technical problem, the online roll gap instrument for the continuous casting of the plate blank comprises a box body, a roll gap detection mechanism, a horizontal position switch, a vertical position switch and a controller;
the bottom surface of the box body is provided with a mounting bottom plate, the upper parts of the left side and the right side are provided with a long joint measuring groove, the controller is arranged in the box body, the horizontal position switch and the vertical position switch are arranged in the box body and are vertically mounted, and the signal output ends of the horizontal position switch and the vertical position switch are respectively connected with the controller;
the roll gap detection mechanism comprises a rotating shaft, a rotating shaft sleeve, a left measuring arm, a right measuring arm, a left connecting plate, a right connecting plate, a left measuring head guide plate, a right measuring head guide plate, a left spherical measuring head, a right spherical measuring head, an angle encoder and two damping springs, wherein the rotating shaft is vertically arranged on the bottom surface of the box body through a bearing seat, the angle encoder is connected with the bottom end of the rotating shaft, a signal output end of the angle encoder is connected with the controller, the rotating shaft is sleeved in the rotating shaft sleeve, one end of the left measuring arm and one end of the right measuring arm are respectively connected with the rotating shaft and the rotating shaft sleeve, the other end of the left measuring arm and the other end of the right measuring arm are respectively connected with the left measuring head guide plate and the right measuring head guide plate through the left connecting plate and the right connecting plate, the left measuring head guide plate and the right measuring head guide plate are respectively positioned in the measuring gap long grooves on the left side and the right side of the box body and are respectively driven by the rotating shaft and the rotating shaft sleeve to extend and retract along the measuring gap long grooves, the left spherical measuring head and the right spherical measuring head are respectively arranged on the arc-shaped end faces of the left measuring head guide plate and the right measuring head guide plate, and the two damping springs are arranged on the left side and the right side of the box body and are respectively connected with the rotating shaft and the rotating shaft sleeve.
Furthermore, the roll gap instrument also comprises a radian detection mechanism, the lower part of one side of the box body is provided with an arc-aligning long groove, the radian detection mechanism comprises a mounting seat, an arc aligning plate, a guide post, a spring and an inclination angle sensor, the mounting seat is arranged on the bottom surface of the box body and is positioned in the middle of the arc-aligning long groove of the box body, the guide posts are vertically arranged on the top surface of the mounting seat at intervals, guide grooves are arranged at intervals in the middle of the arc-aligning plate, the middle of the arc-aligning plate is arranged on the top surface of the mounting seat, the guide columns are positioned in the guide grooves, the springs are respectively arranged at the two sides of the middle part of the arc-aligning plate, and the two ends of the springs are respectively connected with the protruding end of the middle part of the arc-aligning plate and the end surface of the mounting seat, the arc aligning plates are positioned in the arc aligning long grooves of the box body and extend and retract along the arc aligning long grooves under the limitation of the guide columns and the guide grooves, the inclination angle sensor is arranged on the rear side of the middle part of the arc aligning plate, and the signal output end is connected with the controller.
Further, the radian detection mechanism further comprises a temperature measurement sensor, wherein the temperature measurement sensor is arranged on the end face of the middle part of the arc aligning plate, and the signal output end of the temperature measurement sensor is connected with the controller.
Further, the controller comprises a data acquisition and storage module, a wireless communication module, a data communication interface and an automatic startup and shutdown module, wherein the input end of the data acquisition and storage module is respectively connected with the signal output ends of the angle encoder, the inclination angle sensor and the temperature measurement sensor, the output end of the data acquisition and storage module is connected with the input end of the wireless communication module, the input end of the automatic startup and shutdown module is connected with the signal output ends of the horizontal position switch and the vertical position switch, and the data communication interface is arranged on the wall of the box body and connected with the data output end of the data acquisition and storage module.
Furthermore, the box body also comprises two handles which are respectively arranged on two end surfaces of the box body.
Furthermore, the detection end surfaces of the left spherical measuring head and the right spherical measuring head are provided with tungsten carbide wear-resistant coatings.
Furthermore, the detection end face of the arc plate is provided with a wear-resistant antimagnetic coating.
Further, the roll gap detection mechanism further comprises shock pads, and the shock pads are respectively arranged at the bottom of the bearing seat of the rotating shaft and on the outer side of the rotating shaft sleeve.
Further, the roll gap detection mechanism further comprises two brittle connection plates, wherein a stress groove is formed in the middle of each brittle connection plate, and the two ends of each brittle connection plate are respectively connected with the left measuring arm and the left connection plate, and the right measuring arm and the right connection plate through bolts.
Furthermore, this roll gap appearance still includes power module, power module includes battery and wireless charging unit, battery and wireless charging unit locate in the box, the battery provides the working power supply of this roll gap appearance, wireless charging unit provides the charging current of battery.
The on-line roll gap instrument for the continuous casting of the plate blank adopts the technical scheme, namely the roll gap instrument comprises a box body, a roll gap detection mechanism, a radian detection mechanism, a horizontal position switch, a vertical position switch and a controller; the box body is respectively provided with a seam measuring elongated slot and an arc aligning elongated slot, the controller is arranged in the box body, and the horizontal position switch and the vertical position switch are arranged in the box body and are vertically arranged; the roll gap detection mechanism and the radian detection mechanism are arranged in the box body, a left spherical measuring head, a right spherical measuring head and a counter arc plate extend out of the box body to realize detection of the roll gap and the radian, the angle encoder, the inclination angle sensor and the temperature measurement sensor transmit detected roll gap and radian information to the controller, and the controller transmits corresponding data to the upper computer. The roll gap instrument overcomes the defects of roll gap and radian detection of the traditional continuous casting machine, realizes tracking detection of roll gap and radian states of the continuous casting machine, improves detection precision, does not need manual operation and intervention, creates conditions for rapid adjustment of parameters such as roll gap of the continuous casting machine, prolongs the service life of sector section equipment, and ensures continuous and normal production of the continuous casting machine.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic structural diagram of an on-line roll gap instrument for continuous casting of a slab according to the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a schematic view of the internal structure of the box body in the roll gap instrument;
FIG. 5 is a view taken along line A-A of FIG. 4;
FIG. 6 is a schematic view of a radian detection mechanism in the roll gap meter;
FIG. 7 is a schematic view of the connection between the left and right measuring arms and the left and right connecting plates in the roll gap measuring mechanism of the roll gap meter;
FIG. 8 is a schematic diagram of a power supply module in the roll gap meter;
FIG. 9 is a schematic diagram of the detection path of the roll gap meter.
Detailed Description
Embodiment as shown in fig. 1 to 6, an on-line roll gap meter for slab continuous casting according to the present invention includes a box 1, a roll gap detection mechanism 2, a horizontal position switch 4, a vertical position switch 5, and a controller 6;
the bottom surface of the box body 1 is provided with a mounting bottom plate 11, the upper parts of the left side and the right side are provided with long measuring slot 12 and 13, the controller 6 is arranged in the box body 1, the horizontal position switch 4 and the vertical position switch 5 are arranged in the box body 1 and are vertically mounted, and the signal output ends of the horizontal position switch 4 and the vertical position switch 5 are respectively connected with the controller 6;
the roll gap detection mechanism 2 comprises a rotating shaft 21, a rotating shaft sleeve 22, a left measuring arm 23a, a right measuring arm 23b, a left connecting plate 24a, a right connecting plate 24b, a left measuring head guide plate 25a, a right measuring head guide plate 25b, a left spherical measuring head 26a, a right spherical measuring head 26b, an angle encoder 27 and two damping springs 28, wherein the rotating shaft 21 is vertically arranged on the bottom surface of the box body 1 through a bearing seat 20, the angle encoder 27 is connected with the bottom end of the rotating shaft 21, the signal output end of the angle encoder 27 is connected with the controller 6, the rotating shaft sleeve 22 is sleeved in the rotating shaft 21, one ends of the left measuring arm 23a and the right measuring arm 23b are respectively connected with the rotating shaft 21 and the rotating shaft sleeve 22, the other ends of the left measuring arm 23a and the right measuring arm 23b are respectively connected with the left measuring head guide plate 25a and the right measuring head guide plate 25b through the left connecting plate 24a and the right connecting plate 24b, the left measuring head guide plate 25a and the right measuring head guide plate 25b are respectively arranged in the long groove 12 on the left side and the right side of the box body 1, 13 driven by a rotating shaft 21 and a rotating shaft sleeve 22 respectively to extend and retract along the slit measuring long grooves 12 and 13, wherein the left spherical measuring head 26a and the right spherical measuring head 26b are respectively arranged on the arc-shaped end surfaces of the left measuring head guide plate 25a and the right measuring head guide plate 25b, and the two damping springs 28 are arranged on the left side and the right side of the box body 1 and are respectively connected with the rotating shaft 21 and the rotating shaft sleeve 22.
Preferably, the roll gap instrument further comprises an arc detection mechanism 3, the lower part of one side of the box body 1 is provided with an arc-aligning long groove 14, the arc detection mechanism 3 comprises an installation seat 31, arc-aligning plates 32, guide posts 33, springs 34 and an inclination angle sensor 35, the installation seat 31 is arranged on the bottom surface of the box body 1 and is positioned in the middle of the arc-aligning long groove 14 of the box body 1, the guide posts 33 are vertically arranged on the top surface of the installation seat 31 at intervals, the guide grooves 37 are arranged in the middle of the arc-aligning plates 32 at intervals, the middle of the arc-aligning plates 32 is arranged on the top surface of the installation seat 31 and the guide posts 33 are positioned in the guide grooves 37, the springs 34 are respectively arranged on two sides of the middle of the arc-aligning plates 32 and two ends of the springs are respectively connected with the protruding end of the middle of the arc-aligning plates 32 and the end surface of the installation seat 31, the arc-aligning long groove 14 of the arc-aligning plate 32 is positioned in the box body 1 and extends and retracts along the arc-aligning long groove 14 under the limitation of the guide posts 33 and the guide grooves 37, the tilt sensor 35 is arranged at the rear side of the middle part of the pair of arc plates 32, and the signal output end is connected with the controller 6.
Preferably, the radian detecting mechanism 3 further comprises a temperature measuring sensor 36, wherein the temperature measuring sensor 36 is arranged on the end surface of the middle part of the arc plate pair 32, and the signal output end is connected with the controller 6.
Preferably, the controller 6 comprises a data acquisition and storage module, a wireless communication module, a data communication interface and an automatic startup and shutdown module, wherein the input end of the data acquisition and storage module is respectively connected with the signal output ends of the angle encoder, the inclination angle sensor and the temperature measurement sensor, the output end of the data acquisition and storage module is connected with the input end of the wireless communication module, the input end of the automatic startup and shutdown module is connected with the signal output ends of the horizontal position switch and the vertical position switch, and the data communication interface is arranged on the wall of the box body and connected with the data output end of the data acquisition and storage module. Wherein the communication interface is used for checking the state of the roll gap instrument in the debugging process or manually receiving detection information when the wireless communication is abnormal, and the communication interface can not be used in a normal state.
Preferably, the box body 1 further comprises two handles 15, and the two handles 15 are respectively arranged on two end faces of the box body 1. The handle is used for carrying and moving the roll gap instrument, and is convenient to carry and install.
Preferably, the detection end surfaces of the left spherical surface probe 26a and the right spherical surface probe 26b are provided with tungsten carbide wear-resistant coatings.
Preferably, the detection end face of the arc plate 32 is provided with a wear-resistant antimagnetic coating.
As shown in fig. 5, the roll gap detection mechanism preferably further includes shock absorbing pads 30, and the shock absorbing pads 30 are respectively disposed at the bottom of the bearing housing 20 of the rotating shaft 21 and outside the rotating sleeve 22. The roll gap gauge is arranged on a dummy bar and used for continuously tracking the roll gap of a continuous casting machine, and various problems can occur in the continuous casting preparation and casting process, such as interference between an opened spherical measuring head and an upper opening of a crystallizer copper plate in the insertion process of the dummy bar, sudden slide down of the dummy bar caused by abnormal clamping force of a driving roller of the continuous casting machine in the casting process, short-distance backward conveying (adjusting the height of a dummy head in the crystallizer) and the like. When the spherical measuring head is stressed seriously, the deformation of the spherical measuring head is easy to damage, and further, the force is transmitted to the position of the rotating shaft through the measuring arm, so that the angle encoder is seriously damaged, and the damage of the type exists in the prior roll gap instruments using other forms. In order to prevent the roll gap instrument from being damaged similarly in the using process, the mechanical impact can be effectively reduced through the shock pad, and the mechanical impact generated by sudden gliding of the dummy bar and the like is prevented from being transmitted to the position of the rotating shaft through the measuring arm, so that the anti-collision protection is provided.
As shown in fig. 7, preferably, the roll gap detecting mechanism 2 further includes two brittle connection plates 29, the middle of the two brittle connection plates 29 is provided with a stress groove 29a, and two ends of the two brittle connection plates 29 are respectively connected with the left measuring arm 23a and the left connection plate 24a, and the right measuring arm 23b and the right connection plate 24b through bolts. In order to prevent short-distance reverse feeding of a dummy bar or hooking damage of a spherical measuring head with peripheral equipment, residual steel and the like, the measuring arm is connected with the connecting plate through a brittle connecting plate; when a spherical measuring head and the like of the roll gap instrument are hooked with equipment or residual steel and the like in the running process of the roll gap instrument and reach a certain force (100-500 kg), the brittle connecting plate automatically breaks at the position of the stress groove, so that the equipment in a box body of the roll gap instrument is protected, and particularly, a rotating shaft and the like are prevented from being stressed and deformed.
As shown in fig. 8, preferably, the roll gap measuring instrument further includes a power module 7, the power module 7 includes a storage battery 71 and a wireless charging unit 72, the storage battery 71 and the wireless charging unit 72 are disposed in the box 1, the storage battery 71 provides an operating power source for the roll gap measuring instrument, and the wireless charging unit 72 provides a charging current for the storage battery 71. The roll gap meter is a detection device with high use frequency, and is generally started from the insertion of a dummy bar until the wireless transmission of detection data is finished. The single circulation that the roll gap appearance has the time delay control outage detects and needs about 1.5 hours, and a conticaster circulation detection volume can reach more than 8 at most every day, though the power consumption of roll gap appearance also can be guaranteed to the mode through artifical change battery, nevertheless can increase operation intensity of labour undoubtedly, also can influence the normal data acquisition of online roll gap appearance. In consideration of the advantage of the electromagnetic induction type charging in terms of cost, conversion efficiency, and the like, the wireless charging unit 72 in the power module adopts an electromagnetic induction type wireless charging mode. After the roll gap meter completes one-time circulation detection and is recycled to the dummy bar car along with the dummy bar, the charging table 73 fixedly arranged on the dummy bar car automatically centers on the wireless charging unit 72 fixed on the roll gap meter, and the charging table is electrified to start working. The wireless charging unit 72 installed at the gap meter generates an induction current by a varying magnetic field, thereby completing the charging process of the secondary battery 71.
The roll gap detection mechanism of the roll gap instrument is characterized in that two clamp-type measuring head structures are arranged on a rectangular box body, the box body can be arranged at any position of a dummy bar of a continuous casting machine according to needs and inserted (fed) into the continuous casting machine along with the dummy bar, 1-4 roll gap instrument box bodies can be arranged on one dummy bar in parallel according to needs and used for measuring and tracking states and precision of different positions in the width direction of the continuous casting machine, the whole thickness of the box body is smaller than that of the dummy bar, the length of the box body is smaller than that of a subsection of one dummy bar, except for a spherical measuring head and an opposite arc plate, the rest parts are all hidden in the box body, and after the roll gap instrument is arranged on the dummy bar, the box body part is protected by a rigid dummy bar and is not influenced by external force, so that the roll gap instrument is effectively protected.
The thickness of the box body is smaller than that of the dummy bar, so that the roll gap instrument body is not damaged by external forces such as driving roll pressing of a continuous casting machine, only two spherical measuring heads for measuring the roll gap of the whole roll gap instrument are exposed out of the box body through the long measuring slot on the box body, and the arc-aligning plate is exposed out of the box body through the long arc-aligning slot and exceeds the thickness of the dummy bar; the box body is attached to the side surface of the dummy bar through the mounting bottom plate by bolts. The roll gap gauge usually works in an environment with high temperature, high humidity and a certain amount of dust such as iron oxide, and meanwhile, the roll gap gauge and the dummy bar are circulated in the continuous casting machine together, so that special working conditions such as sudden sliding of the dummy bar, backward feeding of the dummy bar and the like exist, and although a box body is protected by the rigid dummy bar, certain measures are required to be taken for sealing, moisture prevention, magnetism prevention, collision prevention and the like of internal parts.
The roll gap instrument is arranged on the dummy bar, and the dummy bar can generate micro deflection in the left and right directions in the inserting and running processes, so that the two spherical measuring heads are a sphere arranged according to the roll gap of the continuous casting machine and have two spherical surfaces with certain width, and the measuring error caused by the deflection can be reduced or eliminated. In the detection process, the closer the actual roll gap value is to the round ball, the higher the accuracy of the measured value is. In the detection process, the spherical measuring head and the roller are continuously rubbed and easily abraded, so that the measurement error is caused; meanwhile, the iron scraps in the continuous casting machine are adsorbed on the surface of the spherical measuring head, so that the measurement error is caused; in order to eliminate the two measurement errors, the spherical measuring head is made of high-abrasion-resistant materials, and the detection end face can be sprayed with a tungsten carbide abrasion-resistant coating. In order to prevent the spherical measuring head from interfering with peripheral equipment in the circulating and detecting processes to damage the roll gap instrument, measuring head guide plates are arranged in the extending direction of the spherical measuring head; the measuring head guide plate is connected with the measuring arm through the connecting plate, the measuring arm is respectively connected with the rotating shaft and the rotating shaft sleeve, so that the relative position variation of the two spherical measuring heads in the measuring process is transmitted to the angle encoder through the relative rotation of the rotating shaft and the rotating shaft sleeve, and the angle encoder transmits signals to the controller to form a roll gap value; the two measuring arms are respectively connected with two damping springs fixed on the box body through a rotating shaft and a rotating shaft sleeve, and the damping spring force is enough to ensure that the two measuring arms are spread to the maximum roll gap value capable of measuring the continuous casting machine. In order to prevent the two measuring arms from being blocked by impurities such as scrap iron and the like in the continuous casting machine when the minimum roll gap value is detected, the measuring arms are made of antimagnetic materials, meanwhile, the gap between the two measuring arms must be kept to be less than 4mm, the long measuring gap groove is sealed by a sealing ring, and the scrap iron and the like are prevented from falling into a box body to influence the roll gap detection.
The radian of the continuous casting machine refers to the arrangement of rollers on the outer arc surface of the continuous casting machine and is one of important parameters for ensuring the precision of the continuous casting machine. Poor radian of a continuous casting machine is an important reason for defects such as transverse cracks and internal cracks of a casting blank angle, and serious radian defects are one of main factors causing the service life of a fan-shaped segment roller of the continuous casting machine to be low. The radian detection mechanism of the roll gap instrument consists of an arc aligning plate, a supporting and guiding structure thereof, an inclination angle sensor and a temperature measuring sensor which are arranged in a box body.
As shown in FIG. 6, the arc-aligning plate 32 is installed on the inner side of the box 1 close to the installation bottom plate 11 and is arranged on the installation base 31, the front end of the arc-aligning plate 32 is long-strip-shaped, the middle part of the arc-aligning plate extends backwards to form an installation plate, the arc-aligning plate 32 forms a relatively fixed displacement structure through the guide post 33 and the guide groove 37, when the roll gap meter works, the detection end surface of the arc-aligning plate 32 is provided with pressing force by the spring 34 to be contacted with the two continuous casting working rolls 8, the arc-aligning plate 32 tilts through the activity of the guide post 33 and the guide groove 37, the angle is recorded by the inclination angle sensor 35, and the arc-aligning precision condition is determined by comparing the continuously recorded angle value with the radian theoretical value of each roll of the continuous casting machine. In order to prevent the reduction of the detection precision caused by the deformation of the arc plate 32, the abrasion of the detection end surface, the adsorption of iron oxide and the like, the arc plate 32 can be made of a high-temperature resistant antimagnetic material, and the detection end surface is coated with a wear-resistant antimagnetic layer. In addition, a through hole is arranged from the mounting plate of the arc plate to the detection end face, and a temperature measuring sensor is arranged at the position of the through hole close to the detection end face and used for measuring the temperature of the roller and compensating the measured value of the roll gap of the continuous casting machine.
This roll gap appearance direct mount is on the dummy bar of conticaster, and does not like replacing the conticaster detection device of dummy bar hair style, and the dummy bar circulation of every time can all accomplish a conticaster detection by oneself with opening and water, realizes full-automatic roll gap appearance through controller and corresponding sensor and starts, detects, stops and data reception, need not any manual intervention at the practical application in-process, has simplified roll gap appearance circulation detection operation, makes the normal production operation of detection achievement not influence the conticaster.
As shown in fig. 9, the running state of the roll gap gauge in the whole dummy bar circulation process, the arrow direction represents the running direction detected by the roll gap gauge, and the specific working steps are as follows:
firstly, when a dummy bar is inserted into a casting machine, when an online roll gap meter arranged on the dummy bar is changed from a horizontal state 91 of a dummy bar car to a vertical state 92 of a continuous casting machine, the roll gap meter is automatically started and passes through a vertical section (comprising a crystallizer and a part of rollers of a No. 0 fan-shaped section) of the continuous casting machine, an arc section and a horizontal section 93 of the continuous casting machine along with the dummy bar, and the roll gap meter is always in a detection state in the changing process;
secondly, when the roll gap instrument returns to the dummy bar car through the hoisting position 94, the detection is stopped and the dummy bar car is in a standby state;
thirdly, when the roll gap instrument returns to the dummy bar trolley along with the dummy bar and is in a waiting position of an original horizontal state 91, automatically opening the wireless communication module, entering a communication mode, and transmitting the detected parameter signals of the continuous casting machine to an upper computer;
and fourthly, automatically shutting down through shutdown delay control after the data of the upper computer is received, wherein the whole working process does not need manual participation.
Meanwhile, the judgment of each position state is realized by two position switches which are arranged in the box body and form an angle of 90 degrees with each other, and the two position switches can judge four states, namely a horizontal state 91, a vertical state 92 (comprising a sector section 95), a horizontal section 93 of a continuous casting machine and a winding section 94. The control of the working state of the roll gap instrument is realized by the automatic startup and shutdown module of the controller through the four position state signals, and different working tasks such as data acquisition and storage, stopping acquisition, data communication, automatic startup and shutdown and the like can be completed.
When the roll gap instrument is in the horizontal position 91, the horizontal position switch and the vertical position switch are both in an off state, and the whole system is in a shutdown state; when the dummy bar is inserted into the vertical section of the casting machine, namely the roll gap instrument runs from the horizontal state 91 to the vertical state 92 along with the dummy bar, the horizontal position switch is automatically closed, the automatic startup and shutdown module detects the states of the two position switches, judges that the roll gap instrument is in the vertical state 92, and starts up a collecting and storing program. Similarly, when the two position switches are both in a closed state, the operation of the roll gap instrument to the horizontal section 93 of the continuous casting machine can be judged, and at the moment, data collection is continued; when the roll gap instrument runs to the winding section 94, the horizontal position switch is in an off state, the vertical position switch is in a closed state, the roll gap instrument is judged to be in the winding section 94, the acquisition and storage program is closed, and the detection control system is in a standby state; the roll gap instrument continues to operate along with the dummy bar, when the horizontal state 91 of the dummy bar vehicle is recovered, the wireless communication module is opened, a communication program is started, and after the upper computer confirms that data is received, the roll gap instrument is shut down in a delayed mode, so that the purpose of full-automatic operation of the roll gap instrument is achieved; at this time, the whole work flow is completed, and the next operation detection is waited. The roll gap instrument can automatically detect the precision of the casting machine in the processes of circulation of the dummy bar and casting by position control, and meanwhile, the whole process is automatically finished without manual participation.
The casting blank quality and the service life of continuous casting machine equipment are two most important indexes of continuous casting, the continuous casting needs to obtain a high-quality casting blank, the service life of main equipment such as a higher fan-shaped section is realized, the precision of a casting machine is critical, the roll gap instrument meets the roll gap control characteristics of a continuous casting hydraulic fan-shaped section and the inspection requirements of a main machine for common equipment problems, and basic parameters such as the roll gap, the radian and the like of the continuous casting machine can be accurately and conveniently obtained under the condition that the production of the continuous casting machine is not influenced. The roll gap instrument is proved to be capable of effectively improving the effective operation rate and the maintenance efficiency of a continuous casting machine through field practical application, greatly improving the precision of the continuous casting machine, and providing basic guarantee for stabilizing the quality of a casting blank and prolonging the service life of a sector section.
Claims (9)
1. The utility model provides a slab continuous casting is at line roll gap appearance which characterized in that: the roll gap instrument comprises a box body, a roll gap detection mechanism, a horizontal position switch, a vertical position switch and a controller;
the bottom surface of the box body is provided with a mounting bottom plate, the upper parts of the left side and the right side are provided with a long joint measuring groove, the controller is arranged in the box body, the horizontal position switch and the vertical position switch are arranged in the box body and are vertically mounted, and the signal output ends of the horizontal position switch and the vertical position switch are respectively connected with the controller;
the roll gap detection mechanism comprises a rotating shaft, a rotating shaft sleeve, a left measuring arm, a right measuring arm, a left connecting plate, a right connecting plate, a left measuring head guide plate, a right measuring head guide plate, a left spherical measuring head, a right spherical measuring head, an angle encoder and two damping springs, wherein the rotating shaft is vertically arranged on the bottom surface of the box body through a bearing seat, the angle encoder is connected with the bottom end of the rotating shaft, the signal output end of the angle encoder is connected with the controller, the rotating shaft sleeve is sleeved in the rotating shaft, one end of the left measuring arm and one end of the right measuring arm are respectively connected with the rotating shaft and the rotating shaft sleeve, the other end of the left measuring arm and the other end of the right measuring arm are respectively connected with the left measuring head guide plate and the right measuring head guide plate through the left connecting plate and the right connecting plate, the left measuring head guide plate and the right measuring head guide plate are respectively positioned in the measuring gap long grooves on the left side and the right side of the box body and are respectively driven by the rotating shaft and the rotating shaft sleeve to stretch along the measuring gap long grooves, the left spherical measuring head and the right spherical measuring head are respectively arranged on the arc-shaped end surfaces of the left measuring head guide plate and the right measuring head guide plate, and the two damping springs are arranged on the left side and the right side of the box body and are respectively connected with the rotating shaft and the rotating shaft sleeve; the roll gap instrument also comprises a radian detection mechanism, wherein the lower part of one side of the box body is provided with an arc alignment elongated slot, the radian detection mechanism comprises a mounting seat, an arc alignment plate, a guide post, a spring and an inclination angle sensor, the mounting seat is arranged on the bottom surface of the box body and is positioned in the middle of the arc-aligning long groove of the box body, the guide posts are vertically arranged on the top surface of the mounting seat at intervals, guide grooves are arranged at intervals in the middle of the arc-aligning plate, the middle of the arc-aligning plate is arranged on the top surface of the mounting seat, the guide columns are positioned in the guide grooves, the springs are respectively arranged at the two sides of the middle part of the arc-aligning plate, and the two ends of the springs are respectively connected with the protruding end of the middle part of the arc-aligning plate and the end surface of the mounting seat, the arc aligning plates are positioned in the arc aligning long grooves of the box body and extend and retract along the arc aligning long grooves under the limitation of the guide columns and the guide grooves, the tilt angle sensor is arranged on the rear side of the middle part of the arc aligning plate, and a signal output end of the tilt angle sensor is connected with the controller.
2. The plate blank continuous casting on-line roll gap instrument according to claim 1, characterized in that: the radian detection mechanism further comprises a temperature measurement sensor, the temperature measurement sensor is arranged on the end face of the middle part of the arc aligning plate, and a signal output end of the temperature measurement sensor is connected with the controller.
3. The plate blank continuous casting on-line roll gap instrument according to claim 2, characterized in that: the controller comprises a data acquisition and storage module, a wireless communication module, a data communication interface and an automatic startup and shutdown module, wherein the input end of the data acquisition and storage module is respectively connected with the signal output ends of the angle encoder, the inclination angle sensor and the temperature measurement sensor, the output end of the data acquisition and storage module is connected with the input end of the wireless communication module, the input end of the automatic startup and shutdown module is connected with the signal output ends of the horizontal position switch and the vertical position switch, and the data communication interface is arranged on the wall of the box body and connected with the data output end of the data acquisition and storage module.
4. The slab continuous casting on-line roll gap instrument according to any one of claims 1 to 3, wherein: the box body further comprises two handles, and the two handles are respectively arranged on two end faces of the box body.
5. The slab continuous casting on-line roll gap instrument according to any one of claims 1 to 3, wherein: and the detection end surfaces of the left spherical measuring head and the right spherical measuring head are provided with tungsten carbide wear-resistant coatings.
6. The on-line roll gap instrument for slab continuous casting according to claim 1 or 2, characterized in that: and the detection end face of the arc plate is provided with a wear-resistant antimagnetic coating.
7. The slab continuous casting on-line roll gap instrument according to any one of claims 1 to 3, wherein: the roll gap detection mechanism further comprises a damping pad, and the damping pad is arranged at the bottom of the bearing seat of the rotating shaft and on the outer side of the rotating shaft sleeve respectively.
8. The slab continuous casting on-line roll gap instrument according to any one of claims 1 to 3, wherein: the roll gap detection mechanism further comprises two brittle connection plates, wherein a stress groove is formed in the middle of each brittle connection plate, and the two ends of each brittle connection plate are connected with the left measurement arm and the left connection plate, and the right measurement arm and the right connection plate respectively through bolts.
9. The slab continuous casting on-line roll gap instrument according to any one of claims 1 to 3, wherein: the roll gap instrument further comprises a power supply module, the power supply module comprises a storage battery and a wireless charging unit, the storage battery and the wireless charging unit are arranged in the box body, the storage battery provides a working power supply of the roll gap instrument, and the wireless charging unit provides charging current of the storage battery.
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| CN201710224874.9A CN108687322B (en) | 2017-04-07 | 2017-04-07 | Online roll gap instrument for slab continuous casting |
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| CN201710224874.9A CN108687322B (en) | 2017-04-07 | 2017-04-07 | Online roll gap instrument for slab continuous casting |
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| CN108687322B true CN108687322B (en) | 2021-11-12 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111438339B (en) * | 2019-01-16 | 2021-10-22 | 宝山钢铁股份有限公司 | Detection device for rotation of roller of support guide section of casting machine and application method thereof |
| CN110000224A (en) * | 2019-05-15 | 2019-07-12 | 武汉锐易扬科技有限公司 | A kind of small-sized online roll gap measuring instrument structure |
| CN115070003A (en) * | 2021-03-15 | 2022-09-20 | 宝山钢铁股份有限公司 | Device and method for actually measuring and calibrating continuous casting fan-shaped roll gap |
| CN113084101A (en) * | 2021-03-31 | 2021-07-09 | 攀钢集团攀枝花钢钒有限公司 | Device for measuring roll gap value of tension leveler and intelligent calibration method |
| CN114433808B (en) * | 2022-02-10 | 2024-04-09 | 武汉中飞扬测控工程有限公司 | Sensor for measuring displacement and rotation of continuous casting roller way |
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