Hydraulic pile-driving hammer fast lifting-up method and device

Abstract

The invention discloses a hydraulic pile-driving hammer fast lifting-up method. By arranging pulley mechanisms, the oil cylinder travel or flow is not improved, and the power or efficiency is improved. When a hammer lifting-up oil cylinder piston rod performs retraction operation, under the downward acting force of the movable pulley mechanism, a pile-driving hammer core at the other end of a pulley belt is driven to do hammer lifting-up action, and the pile-driving hammer core is fast lifted up to a predetermined height; and when a hammer lifting-up oil cylinder works again, downward pull force originally applied on the movable pulley mechanism by the hammer lifting-up oil cylinder piston rod is released, the pile-driving hammer core connected to the other end of the pulley belt does thehammer falling action in a free falling mode, and the pile-driving hammer core fast and precisely falls to strike an anvil block. The invention further discloses a hydraulic pile-driving hammer fast lifting-up device implementing the method, the device can be widely applied to manufacturing of high-power, high-speed and efficient pile drivers, and the overall operating reliability of the pile drivers is improved, and the overall service lives of the pile drivers are prolonged.

Description

technical field [0001] The invention relates to engineering piling hammer technology, in particular to a method and device for quickly lifting a hydraulic piling hammer. Background technique [0002] At present, hydraulic piling hammers are mainly divided into two forms: full hydraulic hydraulic piling hammer and gas-hydraulic hydraulic piling hammer. When the gas-hydraulic hydraulic piling hammer works, the upper end of the hydraulic cylinder piston is compressed nitrogen or compressed air. When the hammer core rises, the low pressure The accumulator returns oil, and when piling, the upper end of the piston of the hydraulic cylinder compresses nitrogen or compressed air, together with the weight of the hammer core, the hammer core is pushed down, and the oil is forced to return at the same time. This kind of hammer is currently composed of an oil inlet valve and an oil return valve. In a large hydraulic hammer, more than two oil inlet valves and more than two oil return val...

AI Technical Summary

Problems solved by technology

If you want to increase the height of the hammer lifting or striking energy (that is, striking power or efficiency), it is usually achieved by increasing the stroke of the cylinder; and if you want to increase the speed of lifting the hammer, you can only achieve it by increasing the flow rate of the cylinder. The stroke is greatly increased, the overall volume and cost are greatly increased, therefore, the difficulty of oil cylinder manufacturing and the overall cost of the hydraulic system are also greatly increased

In addition, although this type of hydraulic piling hammer has a high impact energy transfer efficiency, it will also generate relatively large impact and vibration of the hammer core. Big

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