Hydraulic system of a walking pile driver

Abstract

The invention discloses a walking type pile driver hydraulic system, which comprises a main winch, an electric proportional variable pump, a motor, a first oil circuit, a second oil circuit, a multi-way valve and an auxiliary pump; the motor is used to drive the main winch The electric proportional variable pump is connected to the first port and the second port of the motor through the first oil circuit and the second oil circuit respectively; the multi-way valve includes a first valve group and a second valve group, and the The first valve group, the motor, the first oil circuit, the second oil circuit and the electric proportional variable pump form a closed system; the auxiliary pump is connected to the multi-way valve, and the auxiliary pump, the second valve group and the motor form a closed system open system. In the present invention, the open system and the closed system can be switched, and when the main winch is controlled by the closed system, the construction efficiency is improved, and the rising and falling speed of the main winch is improved through control, which shortens the construction time during non-spraying, and Provide the lifting accuracy of the main winch, in case the drilling tool is buried, the open system can be switched to pull out the drilling tool.

Description

technical field [0001] The invention relates to the technical field of crawler pile drivers, in particular to a hydraulic system of a walking pile driver. Background technique [0002] Now, with the increase in the number of three-axis walking pile drivers on the market, production efficiency is improved, energy consumption is reduced, and the safety of equipment use is used to enhance the competitiveness of the equipment. [0003] With the existing hydraulic system, the lifting and lowering speed of the main winch cannot be controlled more accurately; during the construction process, if the hydraulic system of the existing product fails, such as pumps and multi-way valves, the main winch cannot be controlled When lifting or lowering, the drilling tools may be buried. For example, the maintenance time is long, the cement solidifies, the drilling tools cannot be pulled out, and the entire drilling tools are buried in the ground, which affects the construction quality and dama...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to propose a hydraulic system of a walking pile driver, aiming at the inability to control the hoisting and lowering speed of the main hoist more accurately in the prior art and when the hydraulic pressure The problem that the drilling tool cannot be pulled out when a component failure occurs in the system

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