Hydraulic system of a dumper

Abstract

The invention discloses a dumper hydraulic system comprising a hydraulic power unit, and a parking circuit, a hydraulic circuit, a control circuit and a positioning circuit which are controlled by the hydraulic power unit. The hydraulic power unit is used for supplying oil for a main oil circuit through a single oil pump, and the main oil circuit is connected to an electromagnetic relief valve for oil return; the main oil circuit is used for supplying oil to an oil cylinder of the parking circuit through an electro-hydraulic directional valve, dual hydraulic control check valves, a one-way throttle valve and a hydraulic control check valve; the main oil circuit is used for supplying the oil to the oil cylinder of the hydraulic circuit through the electro-hydraulic directional valve, the dual hydraulic control check valves, the one-way throttle valve and the hydraulic control check valve, and the oil pressure of the main oil circuit is reduced through a pilot-operated reducing valve; the main oil circuit is provided with two branches connected to electromagnetic directional valves separately and then connected to the hydraulic control check valves of the parking circuit and the hydraulic circuit to form the control circuit separately; and the oil pressure of the main oil circuit is adjusted through the electromagnetic directional valves, the dual hydraulic control check valves and the one-way throttle valve, and the main oil circuit is used for supplying the oil to a pin cylinder of the positioning circuit. The system is complete in functions and high in safety.

Description

technical field [0001] The invention relates to the field of dumpers, in particular to a hydraulic system of a dumper. Background technique [0002] The dumper is a professional equipment used for unloading large-scale wagons. It can be used to dump coal, sand and other materials loaded on railway open cars. The dumper is widely used in modern large-scale industrial enterprises such as power plants and mines. Especially in thermal power plants, the dumper is an extremely important production equipment. At present, the dumper mainly uses three coupled vane pumps or two coupled vane pumps to supply oil to different circuits respectively, and a single independent plate or pipe connection valve is selected for the control element, which makes the management of hydraulic system valves complicated and inconvenient. It is inconvenient to install, debug and troubleshoot. In addition, the existing hydraulic system cannot predict whether the press cylinder is relieved, and accidents...

AI Technical Summary

Problems solved by technology

At present, the dumper mainly uses three coupled vane pumps or two coupled vane pumps to supply oil to different circuits respectively, and a single independent plate or pipe connection valve is selected for the control element, which makes the management of hydraulic system valves complicated and inconvenient. Inconvenient for installation, debugging and troubleshooting

In addition, the existing hydraulic system cannot predict whether the press cylinder will be relieved, and accidents cannot be avoided

According to the data recorded in the third issue of the 2013 edition of "Xinjiang Nonferrous Metals", Bayi Iron and Steel Co., Ltd.'s dumper had a phenomenon of loosening of the pressure beam when the dumper was running, resulting in an accident in which the train car fell off the track in the turning frame of the dumper.

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