Hydraulic control system of bivalve grab bucket

Abstract

The invention discloses a hydraulic control system of a bivalve grab bucket, which comprises an oil pump, a reversing valve, two hydrocylinders, a first hydraulic control non-way valve and a second hydraulic control non-way valve, wherein the reversing valve comprises an oil inlet, a first oil outlet and a second oil outlet; the oil pump is connected with the oil inlet through a first non-way valve pipeline; the first oil outlet and the second oil outlet are respectively connected to the upper and lower chambers of the hydrocylinders through a second non-way valve and a third non-way valve pipeline; the first oil outlet is respectively connected with an upper pressure port and a lower pressure port of the first hydraulic control non-way valve and the second hydraulic control non-way valvethrough pipelines; the second oil outlet is respectively connected with the upper and lower pressure ports of the first hydraulic control non-way valve and the second hydraulic control non-way valve through pipelines; the lower chambers of the hydrocylinders are connected with an external oil tank through the second hydraulic control non-way valve pipeline; and the upper chambers of the hydrocylinders are connected with the lower chamber of the hydrocylinder through the first hydraulic control non-way valve pipeline. The first hydraulic control non-way valve used in the invention increases the thrust force of the hydrocylinders for the bivalve in the loosening process of the bivalve, thereby avoiding incomplete cargo unloading caused by fallback due to the deadweight of the grab bucket.

Description

technical field [0001] The invention belongs to the technical field of lifting loading and unloading equipment, and relates to a hydraulic control system, in particular to a hydraulic control system of a double-lobe grab bucket. Background technique [0002] According to the driving mode, the grab can be divided into two categories: hydraulic grab and mechanical grab. [0003] The electro-hydraulic double-lobe grab is a hydraulic grab that can replace manpower in various harsh environments for bulk cargo loading and unloading such as mineral powder, fertilizer, grain, and coal. [0004] The work of the electro-hydraulic multi-lobe grab mainly depends on the release and grabbing of the grab. [0005] The working steps of grab release: when the oil pump rotates forward, the oil in the oil tank enters the pump through the check valve, the oil discharges into the pipeline, enters the bottom of the oil cylinder through the check valve, pushes the piston upward, and the oil retur...

AI Technical Summary

Problems solved by technology

[0007] Since there are only two petals in the double petal grab, usually each petal has a relatively heavy weight. If the pressure to push the cylinder piston is not enough, it is easy to cause the double petals of the grab bucket to fall back due to their own weight, making the unloading of the goods incomplete.

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