Water meter calibrating device and method for water meter calibration

Abstract

The invention discloses a water meter calibration device and a method for water meter calibration. Respective timing/frequency metering devices of the water meter calibration device are connected with corresponding photonic samplers and pulse control circuits of a servo motor respectively; a protection sleeve is connected with the cylinder body of a hydraulic cylinder fixedly; the servo motor is fixed on the protection sleeve; a rotation shaft of the servo motor is connected with one end of a screw rod through a coupling fixedly, the other end of the screw rod is connected with a screw rod nut, and the screw rod nut is connected with one end of a piston of the hydraulic cylinder; the hydraulic cylinder is provided with a cylinder body water inlet and a cylinder body water outlet, a water tank is provided with a water tank inlet and a water tank outlet, the cylinder body water inlet is communicated with the water tank outlet through a first water inlet pipe and a water outlet pipe is arranged at the cylinder body water outlet; a second water inlet pipe is arranged at the water tank inlet, the first water inlet pipe, the second water inlet pipe and the water outlet pipe are all provided with on-off valves. According to the invention, independent timing and frequency metering are realized and instantaneous volume flow sof piston standard devices and respective in-series calibrated water meters can be obtained.

Description

technical field [0001] The invention relates to a piston type water meter verification device and a water meter verification method. Background technique [0002] As a standard for the unification and transmission of the value of the flow unit, the water meter verification device can provide an important guarantee for the accuracy and unification of the value transmission of water meters in various regions of my country on the one hand, and provide a reliable basis for economic accounting and trade settlement on the other hand. When formulating national (enterprise) standards and verification regulations for water meters, well-researched and reliable test methods for water meter verification devices can also be used to verify various test data. In addition, when performing type evaluation, verification and calibration of various types of water meters, the water meter verification device is the criterion for judging the measurement performance of water meters, providing a rel...

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Problems solved by technology

Therefore, when the verification flow rate is small, the verification takes a long time, which shows that the verification efficiency is low; (2) the operation and reading of the static volume method are basically carried out manually, and the resulting measurement uncertainty is large; (3) the static mass method water meter The weighing instrument in the verification device is easily affected by the environment (such as vibration, temperature, humidity, etc.), and the environmental conditions are difficult to guarantee, especially the vibration of the water pump and pipeline, so the weighing instrument is prone to zero drift, and the accuracy is difficult to guarantee; (4) It is not easy to save ener

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