Hydraulic control system of extractor accessory

Abstract

The invention relates to a hydraulic control system, aims to solve the problem that error operation is caused easily when a manual ball valve of an hydraulic control system of an existing extractor accessory is switched and provides a hydraulic control system of an extractor accessory. An accessory control valve is connected with a left pipe and a right pipe for being connected with an accessory; the electric control end of a first magnetic exchange valve is connected with a controller, an oil inlet is connected with a leading oil source, an oil return opening is connected with a hydraulic box, an oil outlet is connected with a liquid control end of a cutoff overflowing valve and a liquid control end of a two-position three-way reversing valve simultaneously, and the oil outlet is communicated with either the oil inlet or the oil return opening; an oil inlet of the cutoff overflowing valve is connected with the left pipe, and an oil outlet of the cutoff overflowing valve is connected with a hydraulic oil tank; an oil inlet and an oil outlet of the two-position three-way reversing valve are connected to the right pipe in series, an oil return opening of the two-position three-way reversing valve is connected with the hydraulic oil tank, and the oil outlet is communicated with either the oil inlet or the oil return opening. According to the hydraulic control system of the extractor accessory, a control instrument is operated by an operator who selects to input related commands to the controller, and thus the hydraulic control system of the extractor accessory can work in a two-way mode or a one-way mode.

Description

technical field [0001] The invention relates to a hydraulic control system, more specifically, to a hydraulic control system for an excavator attachment. Background technique [0002] At present, excavators are no longer "shovels" in the traditional sense. Equipped with different attachments, they will achieve different operating functions. With the development of attachments, attachments with different functions require flow, pressure and The direction of oil flow is different. In order to adapt to a variety of attachments, general excavators are equipped with single- and two-way switching systems (one-way system is connected to hydraulic breaker and other attachments, and two-way system is connected to hydraulic shears and other attachments). At present, most of them use three-way ball valves to switch unidirectional and bidirectional systems, and due to the different working pressures required by each attachment, it is necessary to set different pressure levels for unidi...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a hydraulic control system for excavator attachments that is convenient, quick and not easy to operate in order to solve the problem that manual ball valve switching in the existing excavator attachment hydraulic control system is likely to cause incorrect operation

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