The driving device adopts direct push electro-hydraulic push rod. The speed of the electro-hydraulic push rod is fast, up to 110 mm / s. It can adjust the speed, stroke and pushing force according to different working conditions. It has self-locking and overload automatic protection functions. The electro-hydraulic push rod device at the loosening and clamping position is selected according to the transmission torque of the bigring, and the electro-hydraulic push rod device at the flap position is selected according to the weight torque of the valve plate.
The electro-hydraulic push rod of the flap is directly installed on the diagonal brace of the valve. The electro-hydraulic push rod at the clamping part is hoisted on the bottom tie bar with good rigidity and large action space. The electro-hydraulic push rod device takes the motor as the power source, and realizes the reciprocating motion of the push rod through the positive and negative rotation of the motor. The motor of the straight electro-hydraulic push rod is installed at the tail of the push rod, far away from the heat source of the pipeline. Even in case of an accident, the motor can also ensure normal operation.