Piston-type Water Meter Detection Device
Ⅰ. Overview
Liquid flow standard device is widely used in the experiment and verification device of liquid flow instruments, especially for the flowmeter manufacturers, there are a large number of instrument verification work and product development experimental work. A set of efficient and reliable liquid flow standard devices is significant to its production activities. In industrial applications, flow standard devices should not only have sufficient accuracy and reliability but also have a relatively high verification efficiency. Consider the construction cost of the equipment, operation cost, technical requirements of operators, and other factors.
Traditional liquid flow standard devices are mostly based on the mass method and volume method. The flow source depends on the pump to provide flow, but the flow is pulsating, the flow stability is poor, and the flow point adjustment is not accurate. However, with the flow measurement and testing technology With the rapid development of these devices, these devices have not been able to meet the requirements well. In order to meet the requirements of liquid flowmeter verification, calibration, factory inspection, and the growing trend of new flowmeter production, our company designed and manufactured an active piston liquid flow standard device with water as the medium. This standard device is unique in design and its basic working principle It compares the volume flow of the fluid discharged by the piston with the volume flow of the tested flowmeter in a certain time interval. The product of the cross-sectional area of the piston cylinder and the displacement of the piston obtains the volume of the fluid discharged by the piston. Driven by the servo motor, it reduces the disturbance to the liquid flow. It has many advantages such as stability and reliability, good repeatability, a high degree of automation, and easy operation. It avoids the shortcomings of the start-stop effect or the commutator effect of the traditional liquid flow standard device. Conducive to improving the level of measurement uncertainty. The device also has the characteristics of being self-contained, compact structure, high efficiency, and energy saving. It does not need to build a pool and does not require special structural requirements for the building. It is very suitable for production testing and product development testing of small flow meters.
II. Technical Indicators
1. Device Uncertainty: ≤0.2% (k=2) Flow stability ≤ 0.2%;
2. Operating pressure of the device: 0-1 MPa;
3. Operating temperature of the device: 5-85℃;
4. Test number: Ultrasonic or ordinary water meter DN15mm-10 Psc;
DN20mm -10 Psc; DN25:8 Pcs, other type meters' test number according to the pipe length;
5. Communication interface: M-BUS、 RS485;
6. Control system: Siemens PLC、industrial control touch screen;
7. The verification process is automated, with visual interface control, automatic data saving, report generation, and other functions.