Oil and gas drilling blowout device with filtering and anti-blocking functions

The oil and gas drilling blowout device with the filtering and anti-blocking functions comprises an outer barrel, a filtering assembly is installed in the outer barrel, a valve is installed at the bottom of the filtering assembly in a closed mode, and opening and closing of the valve are controlled through an automatic control assembly. The automatic control assembly comprises a telescopic assembly controlled by a first hydraulic telescopic rod, a rotating assembly controlled by a driving motor and a clamping assembly controlled by a second hydraulic telescopic rod, a scraping and sweeping assembly connected to the top of the automatic control assembly can sweep the filtering assembly, and the first hydraulic telescopic rod can be started to drive a limiting mounting plate to move; a limiting block penetrates into a limiting groove, then a driving motor is started, and through meshing of a first bevel gear and a second bevel gear, a fixed rod is driven to rotate, a sealing screw valve rotates, a through valve