METHOD OF CONSUMPTION CHARACTERISTICS CONTROL FOR DIFFERENTIAL-SAFETY DEVICES AND INSTALLATION FOR METHOD IMPLEMENTATION Russian patent published in 2018 - IPC G01M3/02 F02K9/50 

FIELD: testing equipment.

SUBSTANCE: invention relates to a testing technique, more specifically to the field of manufacture and operation of differential-safety devices (DSD) used to protect against the destruction of fuel lines and tanks (reservoirs) with combined bottoms, containing aggressive and fire and explosive unlike components, aircraft. In the method for controlling the consumption characteristic of a differential-safety device (DSD), consisting of a body made of two parts with an input, output and additional channels, based on the supply of a control gas at the inlet channel under pressure and measurement at the outlet of the outlet flow channel of the supplied gas passing through the DSD, first, the control gas is supplied to the inlet of the additional channel and the gas pressure is slowly adjusted to a predetermined first value, and this pressure is maintained at a predetermined first value, then the control gas is supplied to the inlet of the inlet channel and its pressure is slowly adjusted to a predetermined second value that is less than the predetermined first value, then the gas pressure at the input of the additional channel is slowly reduced, at the same time, the gas pressure at the inlet of the input channel is kept constant at the level of a predetermined second value in the time interval of the full cycle of measuring the flow characteristic, and the value of the gas pressure at the inlet of the additional channel is measured, as well as the flow of the control gas passed through the DSD, at the output of the output channel, the gas pressure at the input of the additional channel is reduced to a value at which the gas flow at the output of the output channel reaches a maximum value and becomes stable, then the value of the gas pressure at the input of the additional channel is slowly increased and simultaneously the gas flow at the outlet of the output channel is measured, an increase in the value of the gas pressure at the input of the additional channel is made up to a predetermined first value, after that, the measurement of the gas pressure at the inlet of the additional channel and the gas flow at the outlet of the outlet channel is stopped and the gas pressure is slowly lowered to ambient pressure and the gas supply is stopped first to the input of the input channel, and then to the input of the additional channel, process the results of the measurements obtained, determining the dependence of the gas flow at the output of the output channel of the DSD body as a function of the pressure difference at the inputs of the auxiliary and input channels of the DSD. In the control unit of the flow characteristic of the DSD, whose housing is made of two parts with an input, output and additional channels, consisting of pressure gauges, control valves, throttling devices and a pressure reducer connected with each other by pipelines, the input channel of the body of the DSD is connected to the output of the pressure reducer, the first pressure gauge and the inlet of the valve, the additional channel of the DSD is connected to the output of the first regulating valve, the second pressure gauge and the input of the first throttle, the inputs of the first and second control valves are combined and connected to a source of compressed gas, the output of the second regulating valve is connected to the input of the pressure reducer and the third manometer, the output channel of the DSD body is connected to the inlet of a measuring tube, the output of which through the second reactor is connected to the input of a gas flowmeter, the output of which, the output of the second throttle and the output of the valve communicate with the environment.

EFFECT: reduced measurement time interval and, consequently, saving (accumulating) of the DSD resource in the process of its manufacture (adjustment), acceptance and delivery tests; reception of possibility of the entrance control in shop; achievement of high accuracy of measurement results; exclusion of the human factor and presentation of the received expenditure characteristic.

3 cl, 3 dwg