Large-diameter pipes have large outer diameters and different specifications in production. Some spans are very large. In order to achieve on-line measurement, if a single-range caliper is used, it may be necessary to select different calipers according to different specifications. The measurement method requires the purchase of multiple calipers, and each time the production of the rolled material is replaced, the replacement of the corresponding caliper is time consuming and laborious, and the cost is greatly increased. To this end, Lanpeng has developed a large-diameter, high-precision, large-diameter caliper with an extremely large diameter, which perfectly solves the above problems. Large diameter caliper system mainly includes: caliper, laser range finder, control cabinet, industrial computer, display, sound and light alarm, computer + software (not shown), PLC system (not shown), etc. The composition, system composition and overall structure of the caliper are shown in the figure below. The large diameter caliper adopts a door frame structure, and two sets of emitting lenses and two sets of receiving lenses are respectively mounted on the column through the sliding table. The outside of the probe is protected by a housing. In addition to the lower part and the foundation fixed, the two columns are connected by beams at the top to avoid the inclination of the column affecting the measurement accuracy. (There are also other caliper gauges, as well as large diameter calipers that measure the outside diameter from both directions) The laser range finder is installed at a fixed position on the site, and the distance of the measurement position from the end face of the steel pipe is determined by monitoring the position of the driving. The length of each steel pipe, the starting distance of the measuring point, the number of measuring points, the measuring point spacing, etc. can be set during the measurement. After the setting is completed, the system will measure and record according to the set spacing and points. The distance between the two sets of probes of the large diameter caliper can be adjusted. Therefore, the measurement range can be automatically adjusted by inputting control commands to achieve the measurement of multi-size large-diameter pipes. The measuring range of the large diameter caliper is too large, and the measuring range is φ150 to φ1900 mm, and the range is not fixed and can be customized according to the specifications of the production. In addition to the basic measurement functions, the large diameter caliper has a software display function for analyzing the measured diameter dimensions. Conclusion The variable range large diameter caliper has the following advantages: the measurement accuracy does not increase due to the increase of the range; the various diameters of the large diameter rolled material can be measured; the material of the rolled material is not limited, and the high temperature and softness can be measured. The range is adjustable, it can measure the multi-size large-diameter pipe, save money; easy to use, the measuring range can be automatically adjusted; has the data analysis function; can be equipped with the range finder to realize the length measurement.
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There are many kinds of large diameter pipes, large diameter steel pipes, large diameter seamless steel pipes, large diameter straight seam steel pipes, large diameter spiral welded pipes, large diameter stainless steel pipes, large diameter PC pipes, large diameter welded pipes, large diameter thick wall steel pipes, etc. The manufacturer has the following characteristics: the outer diameter of the pipe is large, and the large-diameter pipe of various specifications is produced and has a large span. Therefore, it is very necessary to develop a large diameter and variable range caliper.