Pile drivers can be basically divided into four types: hydraulic pile drivers, drop hammer pile drivers, steam hammer pile drivers, and diesel hammer pile drivers. The working principle of each type is different.
Hydraulic pile driver is a multifunctional construction machinery for steel pipe piles in highway guardrails. Driven by oil pressure, the hydraulic pressure can be adjusted according to different soil conditions in the formation to achieve appropriate impact force for pile driving. It is a new type of pile driver. According to different configurations, steel pipe piles can be driven, pulled out, or drilled on the roadbed and stable layer before driving. [Safety operating procedures and precautions for pile drivers]
The drop hammer pile driver is a type of pile sinking equipment with the characteristics of simple design, easy installation and transportation, large impact force, and stable performance. It is a steel heavy block that is lifted by a hoist with a hook, and after being unhooked, it freely falls along the guide frame to drive the pile. All adopt electric power, without the need to purchase expensive diesel power.
The pneumatic pile driver consists of a pile hammer, a hammer head, and a hammer seat, powered by steam or compressed air. There are two types of pneumatic hammers: single acting and double acting. Powered by steam or compressed air, there are two types: single acting steam hammer and double acting steam hammer. A single action steam hammer uses a plunger or cylinder as the hammer head, which is driven by steam to rise and then let it fall along the guide rod of the hammer seat to drive the pile.
The main body of the diesel hammer pile driver is also composed of a cylinder and a plunger. The cylindrical diesel hammer uses the cylinder as the hammer seat and is directly guided by the extended inner wall of the cylinder, eliminating the need for two guide rods. The plunger is the hammer head and can move up and down in the cylinder. Its working principle is similar to that of a single cylinder two-stroke diesel engine, and the hammer seat of the diesel hammer is equipped with a fuel injection pump, fuel tank, cooling water tank, and pile cap. The active gap between the plunger and cylinder is sealed with an elastic plunger ring.