How can I distinguish water meters from dry ones?. Still wet?.
Gear box of dry water meterThe counting mechanism of the dry water meter depends on the gear box to be separated from the tested water, so the bottom and the circumference of the gear box must be able to bear the force 2MPa pressure test without deformation. For this reason, in designing dry water meters, more than ten reinforcing ribs are added to the upper and lower parts of the gear box, and the metal bowl lining is often lined on the bottom and inner walls of the gear box to prevent its compression deformation. The center of the upper and lower parts of the gear box is respectively provided with an axle hole, which is respectively matched with the central gear shaft and the impeller shaft. In order to reduce the friction of moving parts, improve the starting flow value, generally has a concave surface on the bottom shaft hole (or plane) jewel bearing. The counting mechanism of dry water meter, in addition to the gear box around and bottom of the water will be separated from it, it is best to gear box top also take good sealing measures, in order to prevent the outside of the sewage flow invasion count mechanism.
Magnetic element of dry water meterDry water meter magnetic materials are commonly used ferrite and NdFeB magnetic element, structure shape are generally annular columnar magnet, magnet and the annular magnet and the door shaped silicon steel sheet.
The biggest difference between dry and wet meters is the metering mechanism. The impeller is separated from the central gear, and the upper end of the impeller is coupled with a magnetic component at the lower end of the central gear by a magnetic component (magnetic ring or cylindrical magnetic steel). When the water flow to drive the impeller to rotate, the magnetic element lower magnetic element and the upper end of the impeller center gear to attract or repel, driving gear synchronous rotation and drive from the center of the water passes through a water meter counter.
