Hydraulic loop for multifunctional tool of excavator

Abstract

The invention discloses a hydraulic loop for a multifunctional tool of an excavator, and relates to the technical field of excavator hydraulic pressure. The pilot side Xa of a spare valve element is connected with a shuttle valve. The two ends of the shuttle valve are connected with a breaking pilot control valve and a pilot solenoid valve correspondingly. The pilot side Xb of the spare valve element is connected with the pilot solenoid valve. A main pump is connected with the spare valve element. End port overflow valves are arranged on oil ways of the spare valve element and connected to a hydraulic oil tank. The oil ways of the spare valve element are connected with work device pipelines without control valve blocks to the multifunctional tool. A two-position three-way reversing valve is mounted on the work device pipeline connected with one oil way. The other oil way of the spare valve element is further connected to the hydraulic oil tank through a stop valve and a breaking overflow valve. According to the hydraulic loop, the pipelines are optimized; maintainability is high; the utilization rate of a single pipeline is effectively increased; the function of being provided with multiple auxiliary tools is achieved; and cost is low.

Description

technical field [0001] The invention relates to the technical field of excavator hydraulics, in particular to a hydraulic circuit for an excavator multifunctional implement. Background technique [0002] When the excavator is used in working conditions such as crushing, shearing, and gripping, the hydraulic system needs to be equipped with corresponding hydraulic lines for crushing, shearing, and gripping. In practical engineering applications, excavators are generally equipped with a breaker. The hydraulic principle is as follows: figure 1 As shown, the P port of the breaker 701 enters the oil through the backup spool 3 of the main valve to drive the breaker to work, and the T port of the breaker 701 returns oil. When oil is returned, it usually does not pass through the spare spool 3, but passes through the working device pipeline 6 (including the valve block), and is directly connected to the hydraulic oil tank 1 or connected to the hydraulic oil tank 1 after the radiato...

AI Technical Summary

Problems solved by technology

Due to the above particularities of the original crushing pipeline, if the excavator needs to be replaced with other equipment except the breaker, the original crushing pipeline cannot be used, and the pipeline needs to be re-arranged. The utilization rate of a single set of pipelines is low, and the investment is relatively high. Large, but labor-intensive and time-consuming

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