High frequency macro-energy hydraulic pile hammer

Abstract

The invention discloses a high frequency macro-energy hydraulic pile hammer which comprises a hydraulic pump and a hammer core, wherein the hydraulic core comprises an inner cylinder sleeve and an outer cylinder sleeve mounted in a spaced manner in a sleeving manner, and an oil inlet channel is formed between the inner cylinder sleeve and the outer cylinder sleeve; a piston rod fixedly connected to a piston penetrates through a cylinder cover and a static supporting sleeve axially to be supported on the static supporting sleeve, a cylinder oil inlet and a cylinder oil outlet are formed in thecylinder bottom, the cylinder oil inlet is communicated to the oil inlet channel between the inner cylinder sleeve and the outer cylinder sleeve; the oil inlet channel is communicated to a rod cavityof the hydraulic cylinder through the oil inlet hole in the inner cylinder sleeve, and a cylinder oil return hole is communicated to a rodless cavity of the hydraulic cylinder; the oil outlet of the hydraulic pump communicates to the cylinder oil inlet and a pressure oil hole of a second inserting valve in parallel, and an oil hole B of the first inserting valve is connected to the cylinder oil outlet; and a control valve as a pilot valve forms a direction control loop with the second inserting valve. The hydraulic pile hammer is simple and reasonable in structure and small in influence on ambient environment, can drive a pile at a high frequency with micro-energy, so that the hydraulic pile hammer is particularly suitable for large foundation pile construction.

Description

technical field [0001] The invention relates to a piling machine used for building foundation construction, in particular to a hydraulic piling hammer with a large-flow hydraulic system and capable of realizing differential connection of hydraulic cylinders. Background technique [0002] Pile foundation is a form of construction engineering foundation widely used on land and at sea, especially with the increasing development and progress of my country's engineering construction, in recent years, my country's ocean engineering, reclamation islands, offshore wind power, large bridges and land high-rise Great progress has been made in construction, etc. These projects not only have very high engineering coefficients, but also become more and more difficult to construct pile foundations, and the length and diameter of foundation piles are also becoming larger and larger, which requires the use of The piling machinery that penetrates the foundation pile into the ground has higher s...

AI Technical Summary

Problems solved by technology

However, the structure of the sliding core control valve in the hydraulic hammer of this technical solution is very complicated, which will not only bring difficulties to assembly and maintenance, but also the response speed of the valve body restricts the striking frequency and striking energy of the hydraulic hammer; especially the hydraulic cylinder Due to the restriction of the two slide valves, the flow rate of the hydraulic system cannot be increased. It is only suitable for small flow hydraulic systems. It is difficult to achieve large flow, high frequency and large impact stroke. It only appears in small building construction.

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