Hydraulic multi-way valve for static pile driver

Abstract

The invention discloses a hydraulic multi-way valve for a static pile driver. The hydraulic multi-way valve comprises a multi-way valve bottom plate, a pile pressing multi-way valve, a walking long ship multi-way valve, a walking short ship multi-way valve, an overflow valve and an unloading valve. According to the hydraulic multi-way valve, the pile pressing multi-way valve, the walking long ship multi-way valve, the walking short ship multi-way valve, the overflow valve and the unloading valve are fixed to the multi-way valve bottom plate, and the multi-way valve bottom plate integrates the functions of oil admission, unloading, oil return and the like through an internal oil duct, so that the space and cost are saved, installation is convenient, the structure is compact, the occupied space of a pipeline is reduced, the number of pipeline connectors is reduced, the number of connecting points is reduced, and the leakage risk is reduced.

Description

technical field [0001] The invention relates to the technical field of multi-way valves, in particular to a hydraulic multi-way valve for static pile drivers. Background technique [0002] my country has launched and used static pile drivers since the 1990s. At present, this type of machine is mainly produced and used in my country in the world; static pile drivers have no noise, no pollution (motor drive), and high operating efficiency. Advantages, especially suitable for urban building foundation construction. [0003] The structure of the clamping hydraulic control system of the existing static pile driver includes fuel tanks, oil pumps, safety valves, reversing valves, hydraulic locks, clamping cylinders, overload valves and other component connections; its working principle is: during operation, Operate the reversing valve, the pressure oil from the oil pump enters the large cavity of the pile clamping cylinder, and the pile clamping cylinder clamps the pile body under ...

AI Technical Summary

Problems solved by technology

[0005] The manual reversing valve has the following defects: (1) large operating torque and high labor intensity; (2) large pressure shock and large pressure loss at the moment of operation; (3) no large flow manual reversing valve due to operating torque; (4) ) The rest of the functional modules need to be connected externally with rubber hoses. There are many connection nodes, which occupy a large space and have a high risk of leakage

[0007] (1) The manufacturing and processing technology is difficult;

[0008] (2) It is not possible to adjust and add functional modules according to the actual needs of the site;

[0009] (3) Troubleshooting is difficult, the quality requirements for maintenance personnel are high, and the cost of later maintenance is high

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