Hydraulic system of walking type pile driver

Abstract

The invention discloses a hydraulic system of a walking type pile driver. The hydraulic system comprises a main winch, an electric proportional variable pump, a motor, a first oil way, a second oil way, a multi-way valve and an auxiliary pump; the motor is used for driving the main winch to ascend and descend, and the electric proportional variable pump is connected to a first port and a second end port of the motor through the first oil way and the second oil way respectively, the multi-way valve comprises a first valve bank and a second valve bank, wherein the first valve bank, the motor, the first oil way, the second oil way and the electric proportional variable pump form a closed system; and the auxiliary pump is connected with the multi-way valve, and the auxiliary pump, the second valve bank and the motor form an open system. According to the system, the open system and the closed system can be switched, when the main winch is controlled through the closed system, the construction efficiency is improved, the ascending and descending speed of the main winch are improved, the construction time during non-grouting is shortened, ascending and descending precision of the main winch is provided, and when a drilling tool is buried, switching to the open system can be conducted 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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