Universal pipeline hydraulic system and excavator

Abstract

The invention discloses a universal pipeline hydraulic system and an excavator, and belongs to the field of hydraulic excavator equipment. The universal pipeline hydraulic system comprises a gear pump, a pilot valve, a one-way electric proportional pressure reducing valve, a pilot operated directional control valve in pipeline connection with the one-way electric proportional pressure reducing valve, a multifunctional tool and an electric control reversing valve, wherein the multifunctional tool and the electric control reversing valve are in pipeline connection with the pilot operated directional control valve and connected in series through a pipeline. The one-way electric proportional pressure reducing valve comprises a one-way electric proportional pressure reducing valve body I and a one-way electric proportional pressure reducing valve body II, and the one-way electric proportional pressure reducing valve body I and the one-way electric proportional pressure reducing valve body II are connected between the pilot valve and the pilot operated directional control valve in parallel. The pilot valve, the one-way electric proportional pressure reducing valve body I, the one-way electric proportional pressure reducing valve body II, the electric control reversing valve and the pilot operated directional control valve are provided with valve ports correspondingly so as to be connected with a hydraulic oil tank through pipelines. According to the universal pipeline hydraulic system, the number of hydraulic system pipelines specially arranged for meeting parameter requirements of different multifunctional tools is effectively reduced, the number of special control systems for matching with the multifunctional tools is reduced, and the repairing difficulty is greatly lowered.

Description

technical field [0001] The invention relates to a general pipeline hydraulic system and an excavator, belonging to the field of hydraulic excavator equipment. Background technique [0002] At present, there is generally only one spare reversing valve on the hydraulic excavator, and one reversing valve can only be connected to one kind of multifunctional machine tools. At the same time, some new control methods need to be added, the adjustment of the pipeline is more complicated, and the waste of the original pipeline is caused. Contents of the invention [0003] In view of the above-mentioned problems in the prior art, the present invention provides a general-purpose pipeline hydraulic system and an excavator, which can be matched with various multifunctional machines and can meet the parameter requirements of different machines. [0004] In order to achieve the above object, the present invention adopts a general-purpose pipeline hydraulic system, including a gear pump, ...

AI Technical Summary

Problems solved by technology

[0002] At present, there is generally only one spare reversing valve on hydraulic excavators, and one reversing valve can only be connected to one kind of multifunctional machine tool. At the same time, some new control methods need to be added, the adjustment of the pipeline is more complicated, and the waste of the original pipeline is caused

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