Independent double-negative-pressure shale shaker

An independent double-negative-pressure shale shaker, comprising a base (10), a fluid discharge device (20), an inclination angle adjustment mechanism (30), a screening device (40), an exciting motor (50) and a double-negative-pressure system (60), wherein the fluid discharge device (20) and the inclination angle adjustment mechanism (30) are arranged on the base (10), the screening device (40) is arranged on the inclination angle adjustment mechanism (30), the exciting motor (50) is arranged on the screening device (40), and the double-negative-pressure system (60) is arranged on the base (10);

• the screening device (40) comprises a housing (41), and a first screen mesh set and a second screen mesh set which are arranged in the housing (41) and are sequentially arranged in a direction from a material outlet to a material inlet;
• a first vacuum disc (42) and a second vacuum disc (43) are respectively arranged at a bottom of the first screen mesh set and a bottom of the second screen mesh set, and bottom of the first vacuum disc (42) and a bottom of the second vacuum disc (43) communicate with the fluid discharge device (20);
• the double-negative-pressure system (60) comprises a support (61) arranged on the base (10), and a first negative-pressure system (601), a second negative-pressure system (602) and a fluid mist separator (62) which are arranged on the support (61);
• the first negative-pressure system (601) communicates with the fluid mist separator (62) and the first vacuum disc (42);
• the second negative-pressure system (602) communicates with the fluid mist separator (62) and the second vacuum disc (43);
• and
• the second negative-pressure system (602) further communicates with a position of a top of the housing (41) corresponding to the second screen mesh set through a fluid mist hose (63), and an on-off valve (64) is arranged on the fluid mist hose (63).