Hydraulic system for hydraulic hammer

Abstract

The invention discloses a hydraulic system for a hydraulic hammer. The hydraulic system comprises a power source, an oil tank, a lifting oil cylinder, an impact hammer core, a second electromagnetic reversing valve, a third electromagnetic reversing valve, a second plug-in valve, a third plug-in valve, a one-way plug-in valve, a second energy accumulator, a third energy accumulator, a fourth energy accumulator, a second check valve, a third check valve, a fourth check valve, a high-pressure pipeline, a low-pressure pipeline, a travel switch and a control unit, wherein the lifting oil cylinderis positioned in the central pit of a valve block through the inner cylinder barrel and the outer cylinder barrel of the lifting oil cylinder and is fastened with a cylindrical boss; the bottom of theinner cylinder barrel is provided with a plurality of oil holes for communicating a lower hydraulic cavity communicates with an annular oil channel; an upper hydraulic cavity and the lower hydrauliccavity communicate through switching on the one-way plug-in valve; and the second plug-in valve, the third plug-in valve and the one-way plug-in valve are independently installed on installation positions between a first oil channel and a third oil channel, between a fourth oil channel and a sixth oil channel as well as between a second oil channel and a fifth oil channel on the valve block. The hydraulic system has the characteristics of large blow energy, small hydraulic oil reversing pressure fluctuation, a low hydraulic element damage rate, small hydraulic pipeline vibration, high piling efficiency and the like, and is suitable for the high-speed flowing and the timely reversing of hydraulic oil.

Description

technical field [0001] The invention relates to the technical field of hydraulic piling in the field of pile foundation construction, in particular to a hydraulic system of a hydraulic hammer. Background technique [0002] With the continuous development of urban construction, prestressed concrete pipe piles, high-strength concrete pipe piles and steel pipe piles are widely used in foundation projects such as industrial and civil buildings, large bridges, elevated roads, intercity railways and large load-bearing components. Generally, construction equipment such as diesel piling hammer, static pile driver and hydraulic piling hammer are used. Due to the problems of oil fume emission pollution, high construction noise, large surrounding vibration and low operation efficiency during pile sinking operation, diesel piling hammer cannot meet the social development requirements such as low-carbon environmental protection, green energy saving, etc., and its use has been restricted ...

AI Technical Summary

Problems solved by technology

Due to the high piling frequency of the hydraulic piling hammer, the high requirements for the stability and rapidity of the reversing, it is necessary to solve the technical problems of high reversing impact caused by the operation of the hydraulic piling hammer, resulting in a high failure rate of the system and poor reliability.

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