Sector section arc-alignment online monitoring method
阅读说明：本技术 一种扇形段对弧在线监测方法 (Sector section arc-alignment online monitoring method ) 是由 王迎春 徐国栋 徐荣军 杨军 郭亮亮 于 2019-04-22 设计创作，主要内容包括：本发明公开了一种扇形段对弧在线监测方法,该方法在相邻的两个扇形段之间设置弹性连接件,所述弹性连接件的两端分别与所述两个扇形段连接,所述弹性连接件上设置有检测所述弹性连接件的发生形变的电阻应变式传感器；通过计算机采集所述电阻应变式传感器的电阻信号,并根据所述电阻信号计算所述弹性连接件的应变量。本发明的扇形段对弧在线监测方法,可以实时监测扇形段的状态,对连铸机扇形段维护和提高铸坯质量非常有意义。(The invention discloses a sector arc-alignment online monitoring method, which is characterized in that an elastic connecting piece is arranged between two adjacent sectors, two ends of the elastic connecting piece are respectively connected with the two sectors, and a resistance strain type sensor for detecting the deformation of the elastic connecting piece is arranged on the elastic connecting piece; and acquiring a resistance signal of the resistance strain type sensor through a computer, and calculating the strain of the elastic connecting piece according to the resistance signal. The sector-shaped section arc-alignment online monitoring method can monitor the state of the sector-shaped section in real time, and has great significance for maintaining the sector-shaped section of the continuous casting machine and improving the quality of a casting blank.)
1. An on-line arc monitoring method for sector sections is characterized in that an elastic connecting piece is arranged between two adjacent sector sections, two ends of the elastic connecting piece are respectively connected with the two sector sections, and a resistance strain type sensor for detecting the deformation of the elastic connecting piece is arranged on the elastic connecting piece;
and acquiring a resistance signal of the resistance strain type sensor through a computer, and calculating the strain of the elastic connecting piece according to the resistance signal.
2. The sector arc-alignment on-line monitoring method according to claim 1, wherein the computer sends out an alarm signal when the dependent variable is greater than a set value.
3. The sector arc-alignment online monitoring method according to claim 1, wherein two ends of the elastic connecting piece are respectively connected with the roller bearing seats of the two sectors.
Technical Field
The invention relates to the technical field of continuous casting machines, in particular to a sector arc-alignment online monitoring method.
Background
In the production process of metallurgical continuous casting, the internal and external quality of the cast strand is a matter of great concern to the metallurgist. The internal quality of the casting blank is mainly represented by uniform components, no looseness, no shrinkage cavity, no cracks and the like. The reasons for these defects are, on the one hand, the inherent properties of the steel grade itself and the continuous casting process, and, on the other hand, the accuracy of the continuous casting installation, in particular the segment-to-arc accuracy.
The sector arc alignment refers to the relative position of the rollers at the inlet and outlet of two adjacent sectors, and the measurement of the sector arc alignment is very difficult to detect due to the limitation of the space of the casting machine, and an operator cannot approach the sector arc alignment to measure the sector arc alignment in the production of the casting machine. Therefore, the arc alignment of the sector section is generally convenient in off-line operation, the operation is very difficult due to the limitation of space after the sector section is on line, and the measurement of the sector section in the continuous casting production process is difficult. The arc alignment precision measurement of the fan-shaped section of the existing continuous casting machine mainly adopts manual measurement, and the arc alignment precision measurement can only be detected in an off-line state or a production stop state of the fan-shaped section, so that the detection difficulty is high, and the measurement in the production process cannot be completed.
The arc alignment state of the fan-shaped section of the continuous casting machine is closely related to the production state, the fan-shaped section is not acted by external force when the casting machine is not in production, the arc alignment state can be in a good state, but in the casting process, the position deviation is generated due to the action force of a casting blank on the fan-shaped section, and at the moment, the arc alignment precision of each fan-shaped section can be reduced. If the arc alignment precision is greatly reduced and exceeds the sector arc alignment management range, the surface crack of the casting blank can be caused. For this reason, when the casting machine is in a bad state, the incidence of slab crack defects increases after several heats of production, so that there is a large difference between the off-line segment arc alignment and the on-line arc alignment of the casting machine, and especially after a period of production, the problem is more prominent. Therefore, the online real-time monitoring of the arc precision of the sector section is very important and significant.
Disclosure of Invention
In order to solve the problems, the invention provides an online arc-alignment monitoring method for a sector, which can detect the arc-alignment state of the sector on line in the production process.
In order to achieve the purpose, the sector arc on-line monitoring method is characterized in that an elastic connecting piece is arranged between two adjacent sectors, two ends of the elastic connecting piece are respectively connected with the two sectors, and a resistance strain type sensor for detecting the deformation of the elastic connecting piece is arranged on the elastic connecting piece; and acquiring a resistance signal of the resistance strain type sensor through a computer, and calculating the strain of the elastic connecting piece according to the resistance signal.
Preferably, when the dependent variable is larger than a set value, the computer sends out an alarm signal.
Preferably, both ends of the elastic connecting piece are respectively connected with the roller bearing seats of the two fan-shaped sections.
The sector-shaped section arc-alignment online monitoring method can monitor the state of the sector-shaped section in real time, provides real-time data and reference for casting blank quality prediction and equipment maintenance, and has great significance for the maintenance of the sector-shaped section of the continuous casting machine and the improvement of the casting blank quality.
Drawings
FIG. 1 is a schematic view of the installation position of the elastic connecting member between two adjacent segments according to the present invention;
fig. 2 is a schematic diagram of the deformation of the elastic connecting piece.
Detailed Description
The following describes in detail a specific embodiment of the present invention with reference to the drawings.
As shown in fig. 1-2, in the sector arc-alignment online monitoring method of the present invention, an elastic connecting member 3 is disposed between two adjacent sectors 1 and 2, two ends of the elastic connecting member 3 are respectively connected to the two sectors 1 and 2, and a resistance strain sensor (not shown in the figure) for detecting deformation of the elastic connecting member 3 is disposed on the elastic connecting member 3; the resistance signal of the resistance strain type sensor is collected by a computer (not shown in the figure), and the strain amount of the elastic connecting piece 3 is calculated according to the resistance signal.
When the relative position of the rollers adjacent to the two fan-shaped sections 1 and 2 changes to delta d, the elastic connecting piece 3 with the original length of L is caused to deform by delta L, and meanwhile, the sensitive element in the resistance strain type sensor is caused to deform by stress, the sensitive element with the initial resistance value of R changes to delta R along with the tensile resistance value, and the strain of the elastic connecting piece 3 can be calculated through the resistance change. Therefore, the deformation condition of the connecting piece of the fan-shaped section can be reflected through the resistance value change of the resistance strain type sensor, and the arc alignment precision of the fan-shaped section is also reflected. .
The strain of the elastic connecting piece 3 is delta L/L, and the relation between the strain and the resistance change of the resistance strain type sensor is
When the sensitivity coefficient K of the resistance strain type sensor is a fixed value after the resistance strain type sensor is determined, and after the sector section is calibrated on the line, the initial resistance value R of the sensor is also the fixed value, so that the strain of the elastic connecting piece 3 can be obtained through the change delta R of the resistance value, and the arc-pairing state of the sector section can be judged. The computer acquires the resistance signal of the sensor by using the measuring circuit, then performs signal amplification, and obtains the strain of the elastic connecting piece 3 by using the computer for calculation processing.
And judging through a corresponding variable of a computer, and when the dependent variable is greater than a set value, sending an alarm signal by the computer so as to remind an operator to confirm whether the casting blank has a crack risk or not, or whether the fan-shaped section needs offline maintenance or not, and ensuring that the fan-shaped section is in a good state.
The two ends of the elastic connecting piece 3 are respectively connected with the roller bearing seats 11, 21 of the two fan-shaped sections 1, 2.
The elastic connecting piece 3 can be arranged between different fan-shaped sections and also between the crystallizer and the section No. 0. The elastic connecting pieces 3 can be arranged between the lower rollers of the fan-shaped sections and also can be arranged between the upper rollers of the fan-shaped sections, and the state shown in figure 1 is that the elastic connecting pieces 3 are arranged between the lower rollers of the fan-shaped sections and between the upper rollers of the fan-shaped sections. And the connecting pieces can be simultaneously installed on the bearing seats 11 and 21 at the two ends of the segment roller so as to confirm the arc alignment state of the two sides of the segment roller, so that whether the casting blank cracks occur on the left side or the right side is distinguished, and the follow-up maintenance point is more definite.
As described above, exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings. It should be understood that the invention is not intended to be limited to these specific details. Equivalent or similar changes in the structure and features of the exemplary embodiments may be made without departing from the spirit and scope of the invention, which shall also fall within the scope of the protection defined by the claims appended hereto.