Coal storage discharging gate, plug valve with actuator

　The PZ series electric-hydraulic push rod flat gate (shortened to electro-hydraulic push rod) is suitable for reciprocating linear (or reciprocating rotational) movement. It serves as the primary control equipment for flow and throughput of powders, granular materials, particle materials, and small pieces. It is also used in remote and high-altitude hazardous areas, and can be connected to computers for centralized (programmed) control. It is now widely used in industries such as metallurgy, mining, coal, electricity, machinery, grain, cement, chemicals, water conservancy, and transportation, and is an indispensable general-purpose power source.

II. Principle and Function:

　　1. Working Principle: The electro-hydraulic push rod is powered by an electric motor, which, through its forward (reverse) rotation, drives the hydraulic oil to be output as pressure oil through a bidirectional gear pump. The oil then travels through an integrated oil block to the working cylinder, thereby achieving reciprocating motion of the piston rod.

　　2. Overload Automatic Protection Function: During the operation of the electro-hydraulic push rod, if the external force on the piston rod exceeds the rated output force or the piston reaches the end position, and the motor is still rotating, the oil pressure in the circuit will rise to the set pressure, and the overflow valve will quickly and accurately overflow, thereby achieving automatic overload protection. Although the motor is rotating, it will not be damaged.

　　3. Self-locking Function: The hydraulic push rod's oil circuit module is designed with a pressure self-locking mechanism. Once the motor stops rotating, the piston rod immediately remains at a certain position, and the pressure oil remains in a pressure-holding state.

　　4. Speed can be infinitely adjusted within the designated speed range according to customer requirements.

　　5. Push and pull forces can be infinitely adjusted within the designated output power range, as per customer requirements.

　　6. Can be infinitely adjusted within the designated travel range as per customer requirements.