Testing device for detecting service life of proportional electromagnetic valve

The invention relates to a testing device for detecting the service life of a proportional electromagnetic valve. The testing device comprises a gas circuit part and a driving control part, the gas circuit part sequentially comprises a gas source, a gas pressure regulating valve, a gas filter, a needle valve and a digital display pressure gauge; the gas circuit part provides required gas flow for the proportional electromagnetic valve to be tested; the driving control part mainly comprises a power supply module, a sensor signal conditioning circuit, a driving circuit, a digital IO module and a main control computer; the driving control part can modulate the duty ratio by setting the pulse width according to the actual flow requirement of the proportional electromagnetic valve, so that the outlet gas flow rate of the proportional electromagnetic valve is controlled. The device is high in integration level and strong in universality, and can simply and conveniently test the service life of the proportional elec