A command type safety valve testing system and method

Abstract

The invention relates to a pilot safety valve testing system and method.The system comprises a control computer, a control unit, a collection unit, an air supply and exhaust system and a pressure monitoring unit.The air supply and exhaust system can filter an air source, pressure is reduced as needed to reach a target pressure value, then, the pressure value is transmitted to a safety valve pilot valve, and the air discharging function is achieved in the testing process and after testing is completed; the control computer is used for terminal control over the testing system and data display.The collection unit is used for collecting pressure data of key positions in the testing system and transmitting the data to the control computer.The control unit is used for transmitting motions and pressure reduction instructions output by the control computer to controlled pressure reducers, stop valves, vent valves and the like so as to achieve air pressure reduction, air path on-off control and exhaust control.When the pilot safety valve testing system is in use, the phenomenon that a storage tank is inflated to reach working pressure can be avoided, and it is ensured that the safety valve reaches the working pressure to complete an on-off test while safety of a storage tank is ensured.

Description

technical field [0001] The invention relates to a test system and method for a command safety valve, which belongs to the field of launch vehicle power system test. Background technique [0002] The safety valve is a key stand-alone product of the launch vehicle. At present, the safety valve of the launch vehicle storage tank mostly adopts the command safety valve, and the pressure test method is mainly used to test the opening and closing function of the safety valve, that is, pressurize the storage tank until the safety valve opens. The pressure causes the safety valve to open, and then the tank is vented to reduce the pressure of the tank to the safety valve to close. [0003] However, for some storage tanks, especially low-temperature propellant rockets, for a certain low-temperature propellant rocket, the allowable working pressure of the storage tank under normal temperature environment under test conditions is lower than that of its low-temperature environment. The a...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a test system and method for command safety valves. By using the ground test system to directly charge and discharge air into the command valve of the command safety valve, the inflation pressure of the storage tank is reduced. Requirements, thus solving the problem that when the allowable test pressure of the tank is lower than the working pressure, the pressure test method cannot be used to test the opening and closing function of the command safety valve

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