Verifying device and method for online sulfur hexafluoride hygrometer

Abstract

The invention discloses a verifying device and method for an online sulfur hexafluoride hygrometer. An air tank is connected with a verifying cabin through an air outlet pipeline; the air outlet pipeline is provided with a verifying inlet valve; the verifying cabin is connected with a circulating pump cabin through a pipeline; an exhaust pipeline of the circulating pump cabin is provided with a connecting valve, an exhaust valve and an exhaust flow meter in sequence; an outlet pipeline of the circulating pump cabin is connected with the air tank and is provided with an outlet valve; a diaphragm pump is arranged in the circulating pump cabin; the circulating pump cabin is provided with a circulating pressure gauge; the verifying cabin is provided with an interface for connecting a verifiedhumidity sensor; the air tank is provided with a pressure gauge and an air inlet pipe; the air inlet pipe is provided with an air inlet valve; a vacuum pump is connected with the air tank through a vacuumizing pipeline; and the vacuumizing pipeline is provided with a vacuum pump air inlet valve. By adopting the device, the online sulfur hexafluoride hygrometer can be compared and measured under the conditions of different gas pressures and different temperatures, and the accuracy of the online hygrometer can be remarkably enhanced.

Description

technical field [0001] The invention relates to a calibrating device for hygrometer detection, in particular to a calibrating device for an online sulfur hexafluoride hygrometer. Background technique [0002] Sulfur hexafluoride is an insulating gas and arc extinguishing gas in high-voltage electrical equipment. The humidity of sulfur hexafluoride gas directly affects its insulation performance. On-line accurate measurement of sulfur hexafluoride gas humidity plays a vital role in ensuring the safety of inflatable electrical equipment. However, the comparison and calibration of sulfur hexafluoride humidity sensors widely used in substations and lines are all carried out under normal pressure, which cannot guarantee the measurement accuracy under working conditions. At the same time, due to the structure of the humidity measuring device, it cannot be guaranteed that the gas detected by the sensor is consistent with the standard gas during comparison and calibration. Conte...

AI Technical Summary

Problems solved by technology

However, the comparison and calibration of sulfur hexafluoride humidity sensors widely used in substations and lines are carried out under normal pressure, which cannot guarantee the measurement accuracy under working conditions.

At the same time, due to the structure of the humidity measuring device, it cannot be guaranteed that the gas detected by the sensor is consistent with the standard gas during comparison and calibration.

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