Multifunctional pressure calibration device

Abstract

The invention discloses a multifunctional pressure calibration device. The device comprises an upper computer, an electric pressure source, a pneumatic pressure controller, a PLC switch controller, agas-liquid isolator filter, a sealing cylinder, an electromagnetic shut-off valve, a filter, a detected meter interface, an electrical signal connection terminal, a multimeter, a direct-current powersupply, a hydraulic controller, an aviation oil sealing cylinder, an air pressure test stop valve, and a pneumatic spare part meter interface. All parts are connected by pressure pipelines and communication lines; the upper computer carries out system controlling; the electric pressure source generates the gas pressure needed by the system; the pneumatic pressure controller carries out low-range controlling and the hydraulic controller carries out high-pressure supplementing adjusting controlling; the gas pressure drives the sealing cylinder by the gas-liquid isolator filter, to carry out pressurizing on the detected meter interface; and the direct-current power supply provides an excitation power source for a detected pressure and the multimeter is used for carrying out outputting collection. According to the invention, the multifunctional pressure calibration device having advantages of simple operation and low cost is easy to implement and is capable of carrying out multi-medium, multi-range, multi-channel full-automatic calibration on different pressure testing devices.

Description

technical field [0001] The invention relates to the technical field of aviation measurement, in particular to a multifunctional pressure calibration device. Background technique [0002] The pressure calibration devices commonly used at home and abroad use a single medium: common gas or common liquid. The same pressure calibration device cannot use multiple media, and the range of each pressure measurement standard is also fixed. This has resulted in an increase in the number of pressure measurement standard configurations and an increase in cost. In addition, the pressure measurement equipment for corrosive media (such as purple oil media) used in special working conditions cannot be calibrated. [0003] Gas pressure calibration devices generally use air or nitrogen as the medium, use gas cylinders as the gas source, and use the comparison method to calibrate through pressure adjustment control. The liquid pressure calibration device generally uses diacid ester or transfo...

AI Technical Summary

Problems solved by technology

[0008] In the calibration of pressure measurement equipment for flame-retardant phosphate ester hydraulic oil (commonly known as purple oil) as the medium, all kinds of pressure measurement equipment in China cannot be calibrated at present, because the medium is extremely corrosive, so the existing domestic The pipes and connectors of such pressure calibration devices are easily corroded, resulting in pressure leakage, so that they cannot be used for a long time

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