Self-priming apparatus for quick no-water startup

A self-priming apparatus for quick no-water startup, comprising a structure of a symmetrical cylinder and comprising a front-stage inlet chamber, a middle-stage gas-liquid separation chamber, and a rear-stage gas-liquid separation chamber, wherein a plurality of two-stage chamber gas-liquid separation one-way channels are symmetrically arranged between adjacent chambers of the front-stage inlet chamber, the middle-stage gas-liquid separation chamber and the rear-stage gas-liquid separation chamber, a plurality of one-way outlets are symmetrically arranged in an inner cavity of the rear-stage gas-liquid separation chamber, and fixed supports are respectively arranged on bottom sides of the front-stage inlet chamber, the middle-stage gas-liquid separation chamber, and the rear-stage gas-liquid separation chamber;

• by decreasing or increasing volumes of an outer cavity and an inner cavity of the front-stage inlet chamber, water is sucked in due to a pressure difference and a water intake and a preliminary gas-liquid separation are carried out;
• the middle-stage gas-liquid separation chamber is configured for a gas-liquid separation;
• and
• by decreasing or increasing a volume of the inner cavity of the rear-stage gas-liquid separation chamber, water is rapidly expelled due to a pressure difference and a water discharge and a gas-liquid separation are carried out.