阅读说明：本技术 用于铸机支撑导向段辊子转动的检测装置及其应用方法 (Detection device for rotation of roller of support guide section of casting machine and application method thereof ) 是由 杨建华 周永 王泽济 朱列昂 杨锐 巴达日夫 安伟 于 2019-01-16 设计创作，主要内容包括：本发明公开了一种用于铸机支撑导向段辊子转动的检测装置及其应用方法,在铸机的支撑导向段出口位置的被动辊端部轴承位置安装检测装置,根据转动检测信号的跟踪数据判断辊子与铸坯的紧贴情况,并通过对铸机浇钢过程中铸机开浇、正常浇注、引拔以及铸机浇注中因中间包更换操作停车等生产节点、及各种钢种、各种二冷模式、各种浇注速度信息,推断该位置的辊缝控制合理性、二冷工艺和操作控制的合理性、设备精度状态以及导致支撑导向段下耳轴的受力方向和受力程度。本发明为铸机设备的维修、连铸生产操作的规范和二冷工艺的合理性判断提供依据,也为铸坯质量缺陷提供预警。(The invention discloses a detection device for the rotation of a roller of a support guide section of a casting machine and an application method thereof. The invention provides a basis for the maintenance of casting machine equipment, the specification of continuous casting production operation and the rationality judgment of secondary cooling process, and also provides early warning for the quality defect of the casting blank.)

1. A sensing apparatus for sensing rotation of a roll of a support guide segment of a casting machine, comprising: the roller of the support direction section exit position of casting machine to and the roller bearing frame who is used for fixed mounting roller, its characterized in that still includes: detecting a reference object, a rotating speed sensor and a casting machine pouring information database platform;

the detection reference object is arranged at the end part of the roller at the outlet position of the support guide section and rotates along with the roller;

the rotating speed sensor is arranged on the roller bearing seat through a support and used for receiving a rotating signal of the detection reference object and inputting the signal to the casting machine pouring information database platform;

the casting machine pouring information database platform is used for carrying out comparison operation and comprehensively judging whether data are abnormal or not.

2. A sensing apparatus for the rotation of a caster support guide segment roller as defined in claim 1, wherein: the detection reference object is a gear type target disc and is connected to the bearing position at the end part of the roller through a fixing bolt.

3. A sensing apparatus for the rotation of a caster support guide segment roller as defined in claim 1, wherein: the stent, comprising: the device comprises a fixed support and a mounting support, wherein the fixed support is connected to the roller bearing seat, the mounting support is connected to the fixed support through a fixing bolt, and the rotating speed sensor is arranged on the mounting support and is positioned through a clamping bolt.

4. A sensing apparatus for detecting rotation of a caster support guide segment roller as defined in claim 2, further comprising: and the gear type target disc is sleeved on the cooling water jacket and is connected to the bearing position at the end part of the roller through a fixing bolt.

5. A sensing apparatus for detecting rotation of a support guide segment roll of a casting machine as defined in claim 1, further comprising: the casting machine comprises a machine side signal collector and a computer, wherein the rotating speed sensor is connected with the machine side signal collector through an output wire, the machine side signal collector is connected with the computer, and the computer is connected with the casting machine pouring information database platform.

6. A method of use of a detection of the rotation of a roll of a support and guide segment of a casting machine according to any one of claims 1 to 5, comprising the following process steps:

1) installing a gear type target disc on a bearing position of the end part of the roller at the outlet position of the support guide section, and installing a rotating speed sensor on a bearing seat of the roller;

2) the gear type target disc rotates along with the roller, and the rotating speed sensor starts to receive signals and transmits the signals to the machine side signal collector through an output lead;

3) the rotation information of the roller is collected to a machine side signal collector and then is sent to a computer through a wireless signal, and the computer modulates the signal and inputs the signal into a casting machine pouring information database platform;

4) the casting machine pouring information database platform carries out comparison operation on the roller rotation information, the casting machine equipment running state and the running parameters through application software;

5) and 4) the casting machine pouring information database platform carries out comprehensive judgment on the operation result in the step 4) according to the data judgment logic, then relevant abnormal information is stored, and alarm prompt is carried out through a user terminal.

7. A method of use of a caster support guide segment roll rotation detection as claimed in claim 6, wherein: the operation state of the casting machine equipment in the step 4) comprises the following steps: pouring state and drawing mode.

8. A method of use of a caster support guide segment roll rotation test as claimed in claim 7 wherein:

if the casting machine equipment is in a casting state, judging whether the pulling speed is greater than 0 or not and whether the casting length is greater than the distance from the meniscus of the crystallizer to the central line of the outlet roller of the support guide section or not;

and if the casting machine equipment is in a drawing mode, judging whether the drawing speed is greater than 0 or not, and whether the drawing length is greater than the distance from the meniscus of the crystallizer to the central line of the outlet roller of the support guide section or not.

9. A method of use of a caster support guide segment roll rotation test as claimed in claim 8 wherein: and if the judgment is yes when the casting machine equipment is in a pouring state or in a drawing mode, judging whether the rotating speed V1 of the upper roller and the rotating speed V2 of the lower roller at the outlet position of the support guide section accord with the linear speed V of the moving casting blank:

V＝V1*D1*π±V1*a

V＝V2*D2*π±V2*a

in the above formula, a is a set allowable deviation ratio and is between 1% and 5%, D1 is the diameter of the upper roller, and D2 is the diameter of the lower roller;

if the calculated values of the rotational speed of the upper roller and the rotational speed of the lower roller are smaller than the target values, the roller is indicated to be rotating badly.

10. A method of use of a caster support guide segment roll rotation test as claimed in claim 9 wherein: the data judgment logic in the step 5) is as follows: according to the rotation condition of the upper and lower rollers in a certain time period, judging the abnormal condition of non-rotation or continuous rotation or periodic rotation of the rollers and the rotation deviation condition between the upper and lower rollers, and judging whether the roller is abnormal, the casting blank does not touch the upper roller, the casting blank does not touch the lower roller according to the secondary cooling mode of the casting machine, the actual secondary cooling water flow of a secondary cooling area above the support guide section, the valve control opening degree and the casting machine pulling speed, further judging whether the roller rotates badly or is damaged due to the abnormal roller gap at the outlet of the support guide section, on the basis, the stress direction of the trunnion under the support guide section is judged according to the casting machine roll gap detection, the arc-alignment detection and the sector section roll gap operation actual performance data of the casting machine pouring information database platform, based on the arc alignment precision of the casting machine, the roll gap control process value of the supporting guide section is modified, the ratio of inner arc and outer arc of secondary cooling water is modified, and the operation adjustment of the drawing operation control process of an operator is standardized.

Technical Field

The invention relates to the field of continuous casting machine machinery and process control, in particular to a detection device for rotation of a roller of a support guide section of a casting machine and an application method thereof.

Background

At present, most continuous casting machines at home and abroad are vertical bending slab continuous casting machines, and the continuous casting machines are large-scale equipment formed by connecting a crystallizer, a support guide section and a fan-shaped section. The equipment continuously and stably injects molten steel into a crystallizer with a dummy bar system at the lower part in the production process, forms a blank shell with a certain thickness through cooling water of a copper plate of the crystallizer, then drives a casting blank to be pulled downwards through a dummy bar, bends into a certain radian radius through a supporting guide section, continuously cools an arc-shaped section, corrects the casting blank with a certain radian radius to be horizontal in a straightening section, and finishes solidification in a subsequent horizontal section, and performs ingot stripping and dummy bar recovery after the dummy bar pulls the casting blank out of a continuous casting machine, while the casting blank is continuously driven by a driving roller, and continuously cools, solidifies, continuously and runs downwards in the continuous casting machine.

The supporting guide section (called a branch guide section for short) is used for supporting a casting blank which just exits from the lower opening of the crystallizer and has a thinner blank shell to gradually bend to the curvature radius of a continuous casting machine after a certain vertical distance, and meanwhile, the casting blank is further cooled by secondary cold water and air of the branch guide section to promote the uniform thickening of the blank shell. The branch guide section is composed of a series of rollers with the same or different roller diameters, the equipment fixing mode and the roll gap control mode of different casting machines are different, for example, some foreign steel enterprises adopt the design to position the upper trunnion and guide the lower trunnion, and some foreign steel enterprises adopt the design to position the lower trunnion and guide the upper trunnion. The roll gaps of the rollers in the supporting and guiding sections are different in arrangement, when one casting machine produces casting blanks with the same thickness specification, the roll gaps between the upper and lower frames of the supporting and guiding sections are mechanically fixed and unchanged, when the casting machine produces casting blanks with different thickness specifications, the roll gaps between the upper and lower rollers of the supporting and guiding sections are controlled and adjusted by worm gears and worms or hydraulic cylinders, and the roll gaps in the areas are not changed in the production process. Because the equipment is positioned in the area with the worst working condition environment of the casting machine, no method and means for tracking the relevant conditions of the area are provided, but because the different process roll gap settings and the actual roll gap values (influenced by roll abrasion, bearing clearance, loose connection and the like) of the support guide section and the influences of the cooling strength, the pulling speed and the like in the actual production process are adopted, whether the casting blank is tightly adhered to the roll in the support guide section is an unknown number, when the casting blank is separated from the roll surface (an inner arc roll or an outer arc roll) of the support guide section, firstly, the roll gap setting value at the position is unreasonable, secondly, the phenomenon that the roll gap is larger than the thickness of the casting blank enables the casting blank to be more easily subjected to buckling deformation due to residual stress release and quality defects such as angle transverse cracking and the like, and secondly, when the casting blank is not contacted with the roll surface for a long time, the single surface of, when the casting blank contacts the surface of the roller, the roller does not rotate, so that the casting blank is scratched. In addition, the stress state of the inner arc and the outer arc in an abnormal low-pulling-speed state and when the casting blank is severely supercooled is abnormal, so that the positioning of the supporting guide section or the stress deformation of the guide trunnion and the trunnion seat is more easily caused, and the quality of the subsequent casting blank is subjected to a series of defects.

Disclosure of Invention

In view of the above-mentioned drawbacks in the prior art, an object of the present invention is to provide a device for detecting the rotation of a roller in a support guide section of a casting machine and a method for applying the device, so as to detect the rotation of the roller in the inner and outer arcs of the casting machine in a region when a casting blank passes through the region under different steel types, pulling speeds and secondary cooling conditions, to determine the direction of the deformation stress release of the casting blank in abnormal conditions and the change of the stress release space of the casting blank in the service cycle of the casting machine equipment, and to associate with a large data platform of the casting machine, so as to determine the conditions of the transverse crack and the side crack of the casting blank under various conditions.

In order to achieve the purpose, the invention adopts the following technical scheme:

in one aspect, a detection apparatus for rotation of a roll of a support guide segment of a casting machine includes: the roller of the support direction section exit position of casting machine to and the roller bearing frame who is used for fixed mounting roller still includes: detecting a reference object, a rotating speed sensor and a casting machine pouring information database platform;

the detection reference object is arranged at the end part of the roller at the outlet position of the support guide section and rotates along with the roller;

the rotating speed sensor is arranged on the roller bearing seat through a support and used for receiving a rotating signal of the detection reference object and inputting the signal to the casting machine pouring information database platform;

the casting machine pouring information database platform is used for carrying out comparison operation and comprehensively judging whether data are abnormal or not.

The detection reference object is a gear type target disc and is connected to the bearing position at the end part of the roller through a fixing bolt.

The stent, comprising: the device comprises a fixed support and a mounting support, wherein the fixed support is connected to the roller bearing seat, the mounting support is connected to the fixed support through a fixing bolt, and the rotating speed sensor is arranged on the mounting support and is positioned through a clamping bolt.

Further comprising: and the gear type target disc is sleeved on the cooling water jacket and is connected to the bearing position at the end part of the roller through a fixing bolt.

Further comprising: the casting machine comprises a machine side signal collector and a computer, wherein the rotating speed sensor is connected with the machine side signal collector through an output wire, the machine side signal collector is connected with the computer, and the computer is connected with the casting machine pouring information database platform.

In another aspect, a method for detecting the rotation of a roller of a support guide segment of a casting machine comprises the following process flows:

1) installing a gear type target disc on a bearing position of the end part of the roller at the outlet position of the support guide section, and installing a rotating speed sensor on a bearing seat of the roller;

2) the gear type target disc rotates along with the roller, and the rotating speed sensor starts to receive signals and transmits the signals to the machine side signal collector through an output lead;

3) the rotation information of the roller is collected to a machine side signal collector and then is sent to a computer through a wireless signal, and the computer modulates the signal and inputs the signal into a casting machine pouring information database platform;

4) the casting machine pouring information database platform carries out comparison operation on the roller rotation information, the casting machine equipment running state and the running parameters through application software;

5) and 4) the casting machine pouring information database platform carries out comprehensive judgment on the operation result in the step 4) according to the data judgment logic, then relevant abnormal information is stored, and alarm prompt is carried out through a user terminal.

The operation state of the casting machine equipment in the step 4) comprises the following steps: pouring state and drawing mode.

If the casting machine equipment is in a casting state, judging whether the pulling speed is greater than 0 or not and whether the casting length is greater than the distance from the meniscus of the crystallizer to the central line of the outlet roller of the support guide section or not;

and if the casting machine equipment is in a drawing mode, judging whether the drawing speed is greater than 0 or not, and whether the drawing length is greater than the distance from the meniscus of the crystallizer to the central line of the outlet roller of the support guide section or not.

And if the judgment is yes when the casting machine equipment is in a pouring state or in a drawing mode, judging whether the rotating speed V1 of the upper roller and the rotating speed V2 of the lower roller at the outlet position of the support guide section accord with the linear speed V of the moving casting blank:

V＝V1*D1*π±V1*a

V＝V2*D2*π±V2*a

in the above formula, a is a set allowable deviation ratio and is between 1% and 5%, D1 is the diameter of the upper roller, and D2 is the diameter of the lower roller;

if the calculated values of the rotational speed of the upper roller and the rotational speed of the lower roller are smaller than the target values, the roller is indicated to be rotating badly.

The data judgment logic in the step 5) is as follows: according to the rotation condition of the upper and lower rollers in a certain time period, judging the abnormal condition of non-rotation or continuous rotation or periodic rotation of the rollers and the rotation deviation condition between the upper and lower rollers, and judging whether the roller is abnormal, the casting blank does not touch the upper roller, the casting blank does not touch the lower roller according to the secondary cooling mode of the casting machine, the actual secondary cooling water flow of a secondary cooling area above the support guide section, the valve control opening degree and the casting machine pulling speed, further judging whether the roller rotates badly or is damaged due to the abnormal roller gap at the outlet of the support guide section, on the basis, the stress direction of the trunnion under the support guide section is judged according to the casting machine roll gap detection, the arc-alignment detection and the sector section roll gap operation actual performance data of the casting machine pouring information database platform, based on the arc alignment precision of the casting machine, the roll gap control process value of the supporting guide section is modified, the ratio of inner arc and outer arc of secondary cooling water is modified, and the operation adjustment of the drawing operation control process of an operator is standardized.

In the technical scheme, the detection device for the rotation of the roller at the support guide section of the casting machine and the application method thereof provided by the invention can effectively judge abnormal problems such as the roller gap at the outlet of the support guide section, the secondary cooling water control effect of the head area of the casting machine, the stress direction of equipment, the arc connecting state of the support guide section and the fan-shaped section and the like by utilizing a method for comprehensively judging the rotation detection information of the sectional roller and the tracking information of the state of the casting machine according to the tracking analysis results of common equipment defects and casting blank quality defects in continuous casting, provide basis for the maintenance of the casting machine equipment, the specification of continuous casting production operation and the rationality judgment of a secondary cooling process, and also provide early warning for the quality defects of the casting blank.

Drawings

FIG. 1 is a schematic view of the structure of the detecting unit of the present invention;

FIG. 2 is a schematic view of the installation of the inspection device of the present invention;

FIG. 3 is a flow chart of a method of detecting an application of the present invention.

Detailed Description

The technical scheme of the invention is further explained by combining the drawings and the embodiment.

Referring to fig. 1 to 2, the present invention provides a detecting device for detecting the rotation of a roller of a supporting guide segment of a casting machine, which comprises: the rolls 1 supporting the exit position of the guide section of the casting machine, and the roll chocks 2 for fixedly mounting the rolls 1, which are part of the prior art, are not described in detail herein. Different from the prior art, the method further comprises the following steps: the detection reference object 3, the rotating speed sensor 4 and the casting machine pouring information database platform. Wherein, the detection reference object 3 adopts a gear type target disc.

The detection device of the invention is respectively arranged at one side of a pair of rollers 1 (an upper roller and a lower roller) supporting the exit position of a guide section, the gear type target disc 3 is sleeved on the cooling water jacket 5 and is connected to the bearing position of the end part of the roller 1 through a fixing bolt 6, a fixing bracket 7 is arranged on the roller bearing seat 2, a mounting bracket 9 is fixed through a fixing bolt 8, a rotation sensor 4 is arranged in the mounting bracket 9, and the rotation sensor is positioned through a clamping bolt 10. In the casting process of the casting machine, when a roller 1 is supported by the action of the bulging force of a casting blank and moves downwards, the roller 1 starts to rotate, a gear type target disc 3 fixed at the end part of the roller 1 rotates along with the roller 1, a rotation sensor 4 arranged on a roller bearing seat 2 starts to receive signals and transmits the signals to a machine side signal collector through an output lead 11, the rotation information of the roller 1 is collected to the machine side signal collector and then is sent to a remote computer through wireless signals, the signals are modulated and then are input into a casting machine casting information database platform, after comprehensive judgment is carried out according to data judgment logic, relevant abnormal information is stored by a system, and alarm prompt is carried out through a user terminal.

The supporting guide section of the slab caster is one of main body devices with the lowest service life of single online in all fan-shaped section devices of the caster, in the actual production and quality control process, the high-incidence areas with quality defects such as scratch and transverse corner crack of a casting blank exist in the areas, the peripheral problems of the crystallizer are relatively visual, and more detection and tracking means exist, but the interface positions of the supporting guide section and the 1# fan-shaped section do not have practical and reliable detection and tracking means at present.

Theoretically, all the driven rollers in the supporting and guiding section should be tightly attached to the bulging force of the casting blank with the liquid core in the pouring process, and the driven rollers are driven to rotate by the continuous downward movement of the casting blank, and if a certain roller of the supporting and guiding section does not rotate in the pouring process, two possibilities exist: firstly, a roller bearing is damaged and locked, so that a casting blank is scratched; secondly, the casting blank does not cling to the roller and does not rotate because the roll gap in the area is abnormally changed or the thickness of the casting blank is smaller than that of the roll gap. And for the supporting guide section, the roller at the outlet position is most easy to generate the phenomenon because of the problems of arc contact and poor roller gap with the 1# segment.

The invention installs a detection device at the end bearing position of a driven roller at the exit position of a support guide section of a casting machine, judges the tight contact condition of the roller and a casting blank according to the tracking data of a rotation detection signal, and infers the roll gap control rationality, the rationality of secondary cooling process and operation control, the equipment precision state, and the stress direction and stress degree of a trunnion under the support guide section by casting the casting machine in the steel casting process of the casting machine, normal casting, drawing, production nodes such as tundish replacement operation stop and the like, various steel types, various secondary cooling modes and various casting speed information. And (4) combining the actual quality defect of the casting blank with the rotation condition of the outlet roller of the support guide section to set quality risk control early warning and casting blank scratching prompt of corner transverse crack, side transverse crack, triangular area crack and the like of the casting blank.

The invention also provides an application method for detecting the rotation of the rolls of the support guide section of the casting machine, which is shown in the combined figure 3 and comprises the following processing flows:

1) a gear type target disc is arranged on a bearing position of the end part of the roller 1 at the position of the outlet of the support guide section, and a rotating speed sensor 4 is arranged on a roller bearing seat 2;

2) the gear type target disc rotates along with the roller 1, and the rotating speed sensor 4 starts to receive signals and transmits the signals to the machine side signal collector through the output lead 11;

3) the rotation information of the roller 1 is collected to a machine side signal collector and then is sent to a remote computer through a wireless signal, and the computer modulates the signal and inputs the signal into a casting machine pouring information database platform;

4) the casting machine pouring information database platform carries out comparison operation on the roller rotation information, the casting machine equipment running state and the running parameters through application software;

5) and 4) the casting machine pouring information database platform carries out comprehensive judgment on the operation result in the step 4) according to the data judgment logic, then relevant abnormal information is stored, and alarm prompt is carried out through a user terminal.

Preferably, the operation state of the casting machine equipment in the step 4) includes: pouring state and drawing mode.

Preferably, if the casting machine is in the casting state, it is determined whether the casting speed is greater than 0 and the casting length is greater than the distance L from the meniscus of the mold to the centerline of the exit roller of the support guide section.

Preferably, if the casting machine apparatus is in the drawing mode, it is determined whether the drawing speed is greater than 0 and the drawing length is greater than the distance L from the meniscus of the mold to the centerline of the exit roller of the support guide section.

Preferably, if the casting machine equipment is in the pouring state or in the drawing mode, the judgment result is yes, and whether the rotating speed V1 of the upper roller and the rotating speed V2 of the lower roller at the exit position of the support guide section meet the linear speed V of the moving casting blank:

V＝V1*D1*π±V1*a

V＝V2*D2*π±V2*a

in the above formula, a is a set allowable deviation ratio and is between 1% and 5%, D1 is the diameter of the upper roller, and D2 is the diameter of the lower roller;

preferably, if the calculated values of the rotational speed of the upper roller and the rotational speed of the lower roller are smaller than the target values, the rotation failure of the roller is indicated.

Preferably, the data determination logic in step 5) is: judging the abnormal conditions of the non-rotation or continuous rotation slow or periodic rotation of the roller and the rotation deviation between the upper roller and the lower roller according to the rotation conditions of the upper roller and the lower roller within a certain time period T (generally within 5-10 minutes), judging the abnormal conditions of the roller (bearing), no contact of the casting blank with the upper roller and no contact of the casting blank with the lower roller according to the secondary cooling mode of the casting machine, the actual secondary cooling water flow of a secondary cooling area above a support guide section, the valve control opening, the casting machine pulling speed and the like, judging the abnormal conditions of the roller gap at the outlet of the support guide section (angular transverse crack risk and triangular area crack risk), the poor rotation or damage of the roller (casting blank scratch), judging the stress direction of a trunnion under the support guide section according to the roller gap detection and the arc alignment detection of the casting machine of a casting information database platform of the casting machine and the actual performance data of the roller gap operation of a No. 1 segment, and providing the arc alignment precision of the, Modifying the roll gap control process value of the support guide section, modifying the ratio of inner arc and outer arc of secondary cooling water, standardizing the drawing operation control of an operator and other process operation adjustments.

In conclusion, the support guide section of the slab caster is a black box for controlling the quality defect of the casting blank, and the rotation condition of the roller at the outlet of the support guide section intensively reflects two important indexes of the quality of the casting blank and the precision of casting machine equipment, such as problems of roller gap control, secondary cooling process, operation specification and the like in various production processes of continuous casting, particularly abnormal (such as low drawing speed and drawing) processes.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.