Heat Flow Meter Calibration Device Design Based On PLC

In recent years, the construction of a conservation oriented society concept has win support among the people."Save" has two meanings:first is to eliminate waste, whichrequire us to reduce resource consumption and waste in the economic operation; second is consumed in the production process, with as little as possible resources and energy, to create the same, even more wealth. With the development of the national economy, central heating has become an important method of heating in winter people life indispensable. But the central heating due to some infrastructure is not perfect, it also appeared many problems, there are waste.In order to solve many problems in the existing central heating system, heatingsystem gradually developed metering system. In order to ensure the accuracy ofmetering table, the need for heat meter detection. This paper introduces a design ofautomatic flow calibration device, the device can fast detect the heat meter, suitable for household heat meter for product factory detection and correction, central heating enterprises of household heat meter sampling and inspection, quality and Technology Supervision Department of heat meter, measurement precision.A closed flow system designed in this paper, according to the central heating system. The design of the system flow rate range is0.005m3/h-5m3/h, the temperature range of the fluid medium of5-90degrees Celsius, the detected meter diameter of DN15or DN20. In order to facilitate the detected meter dismantling, the detected metercommunication with PC using optical interface. The system is designed in four different diameter pipes at the end, through the switch combination of the fourpipeline can simulate a variety of flow velocity. After system start-up, control of constant water temperature at55degrees Celsius, the frequency converter to adjust water pump system in the working state of the hydraulic system in0.6MPa-1MPa.Open the safety protective cover, install the seized table, press and hold the button clamping, pneumatic clamping device for pneumatic clamping, all the seized table, using code scanning gun sequentially scans the detected meter bar code, confirm without any error closing safety protection cover, through the operation panel and select automatic detection or manual detection, by weighing method for household use heat meter accuracy detection system detection.