An environment-controllable flow detection standard device
A standard device and flow verification technology, which is applied in the direction of measuring device, test/calibration device, liquid/fluid solid measurement, etc., can solve the influence of the accuracy of the verification and calibration process, the environment cannot be accurately controlled, and the volume of the flow verification standard device Large and other problems, to achieve the effect of improving accuracy
Inactive Publication Date: 2015-11-25
姜跃炜
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Problems solved by technology
[0004] At present, the flow verification standard devices used in the market are usually large in size, and the environment in which they are located cannot be precisely controlled.
For example, when the temperature needs to be adjusted, it is usually achieved by adjusting the temperature of the water flowing into it. However, for the verification device, especially the verification device with a long detection production line, it is impossible to ensure that each instrument under test is at the set value. Under the same temperature conditions, the accuracy of the verification and calibration process is affected
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[0012] Example: see figure 1 , an environment-controllable flow verification standard device, including a verification system composed of a piston type volumetric tube skid 10, a flow meter 30 to be measured and a water storage tank 40 connected in sequence.
[0013] The piston type volumetric tube skid 10 is composed of a plurality of piston type volumetric tubes with different diameters. Preferably, the number of piston volume tubes is 3, which are respectively volume tubes 11, 12 and 13. The diameter and size of the tubes change stepwise, which is an optimal choice for measuring large flow, medium flow, and small flow.
[0014] By adjusting the propulsion speed of the propulsion motor and selecting different pipe diameters, the range of measurable flow velocity can be significantly expanded, that is, the range ratio can be enlarged. In addition, the combination of piston volumetric tubes of different sizes makes it possible to select volumetric tubes with corresponding dia...
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The invention provides an environment-controllable flow detection standard device comprising a detection system used for detection and calibration of flow instruments. The detection system is disposed in an enclosed environment with environmental factors adjustable. An adjustor 51 is used for adjusting the factors therein, such as the temperature, the humidity and the pressure, so that to-be-tested instruments are under the conditions of the set temperature, humidity and pressure. Therefore, the accuracy of detection and calibration results can be improved and the requirement for the metering accuracy under different conditions of the flow instruments is met.
Description
technical field [0001] The invention relates to a flow verification standard device, in particular to an environment controllable flow verification standard device. Background technique [0002] The flow verification standard device is a standard test bench used in the verification and calibration of flow meters, and its accuracy and stability greatly affect the measurement accuracy of the flow meters produced. [0003] In order to ensure the installation of flow meters in different geographical locations around the world, the flow verification standard device needs to simulate changes in environmental factors such as temperature, humidity, and pressure in various regions. Below -40°C, but Hainan Island, located at the southern tip of China, has a long summer and no winter, and the temperature in the coldest January and February still reaches 10-21°C. Therefore, to install flow meters in these areas, it is necessary for flow verification devices to simulate In response to v...
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IPC IPC(8): G01F25/00
Inventor 姜跃炜
Owner 姜跃炜