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I. Overview:

　PZ Series Electric-Hydraulic Push Rod Plate Sluice Gates (abbreviated as Electric-Hydraulic Push Rod) are suitable for reciprocating linear (or reciprocating rotational) motion. They are the primary control equipment for flow and conveying volume of powdery, granular, and particle materials, as well as small pieces. They are also used in long-distance and high-altitude hazardous areas and can be connected to computers for centralized (programmed) control. They are now widely used in industries such as metallurgy, mining, coal, electricity, machinery, grain, cement, chemicals, water conservancy, and transportation, serving as an indispensable general power source.

Section II: Principles and Functions:

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

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

　　3. Self-locking Function: The hydraulic push rod's oil circuit integrated block is designed with a pressure self-locking mechanism. Once the motor stops rotating, the piston rod immediately stays 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 as per 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 according to customer requirements.

Section 3: Comparison with Similar Products:

Hydraulic push rods offer the following advantages compared to electric push rods, electric actuators, hydraulic cylinders, and pneumatic cylinders:

　　1. Features reliable overload automatic protection, ensuring the motor operates normally even under overload or at the end of travel, without damaging or burning other components. Electric actuators and electric actuators simply can't compare.

　　2. Electro-hydraulic push rods can be started under load, whereas it is quite difficult for electric push rods and electric actuators.

　　3. The same electro-hydraulic push rod can be infinitely adjusted within its rated pushing and pulling force range, thus offering a wide driving force range, which is something that electric push rods and cylinders cannot achieve.

　　4. Under the same thrust and speed, the electro-hydraulic push rod consumes half the electrical power of the electric push rod and electric actuator.

　　5. The electro-hydraulic push rod uses full-liquid transmission, offering sensitive operation, smooth running, and effectively reduces external impact forces. It provides accurate stroke control, while cylinders, electric push rods, and electric actuators cannot achieve this.

　　6. The electro-hydraulic push rod features a fully enclosed mechanical, electrical, and hydraulic integrated structure. The working oil circuit circulates within a pressure-free, sealed steel cylinder, offering a compact design, no oil leakage, and ease of installation and maintenance. It resists dust and water intrusion in harsh environments and prevents internal rusting, ensuring a longer service life compared to cylinders, electric push rods, and electric actuators.

　　7. Low investment, but requires expensive air compressor stations for cylinder installation, with the risk of leaks in air pressure pipes and unstable pressure, as well as high noise levels; hydraulic cylinders need to be set up with a hydraulic station, whereas electro-hydraulic actuators only need to be connected to the power source for use.

　　8. Easy maintenance. In special cases, the electro-hydraulic actuator only requires replacement, whereas the hydraulic cylinder needs to be carefully diagnosed for the fault cause first before undergoing meticulous repair, which will affect the smooth operation of the entire work.