Device and method for detecting pressure regulation performance of gas pressure regulator

Abstract

The invention discloses a device and method for detecting the pressure regulation performance of a gas pressure regulator. The detecting device comprises a gas channel part and a control part. The gas channel part comprises a gas source, a ball valve, a filter, a reducing valve, a high pressure solenoid valve, a proportional pressure regulating valve, the measured pressure regulator, a low pressure solenoid valve, a flow control valve and a flow sensor. The control part is composed of an industrial control computer, a driver board, a display and a data acquisition card. The flow control valve, the flow sensor and a software PID control algorithm achieve closed-loop control over the flow, and provide accurate flow regulation for an outlet of the measured pressure regulator. The detecting method comprises the following steps: starting a test, initializing devices and variables, measuring closing pressure and outlet pressure, testing pressure regulation static characteristics, judging whether the measured pressure regulator is qualified or not, and ending the test. The device and method achieve closed-loop control over the flow under the low pressure, ensure that inlet pressure of the gas pressure regulator is kept constant and the flow of the outlet is controlled accurately, measure the closing pressure, the outlet pressure, the pressure regulation static characteristics and pressure return difference of the pressure regulator rapidly and accurately, and have the advantages of being reliable in performance, high in degree of automation in the detection process, high in precision and the like.

Description

technical field [0001] The invention relates to a pressure regulator performance detection technology, in particular to a gas pressure regulator pressure regulation performance detection device and detection method. Background technique [0002] The gas pressure regulator is one of the key equipment to ensure the normal transmission and distribution of gas. Its function is to adjust the higher inlet pressure to the lower outlet pressure, and automatically keep the gas pressure constant at the outlet according to the change of gas demand and working conditions. in the set value. The safety and reliability of pressure regulating performance not only affects the quality of gas supply, but also is closely related to the safety of people's lives and national property. Unqualified pressure regulator products will cause safety accidents. For example, high closing pressure will cause gas leakage, which can easily cause fire and personnel poisoning, and other vicious accidents; To...

AI Technical Summary

Problems solved by technology

The test device consists of two gas circuits, which use many devices, complex structure, and high cost; in addition, the vacuum generator provides positive and negative guide pressure for the flow regulator, so that the flow regulator can work normally, but it is not consistent with the actual pressure regulation. The operating environment of the regulator does not match, it may affect the main gas circuit during work, resulting in inaccurate control of the inlet pressure and outlet flow of the pressure regulator under test, affecting the test accuracy

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