Coke furnace machine furnace door lifting hydraulic control system

The utility model belongs to a coke furnace machine furnace door lifting hydraulic control system. The coke furnace machine furnace door lifting hydraulic control system comprises a first oil cylinder, a second oil cylinder and a lifting oil cylinder and is characterized in that an upper cavity of the lifting oil cylinder is communicated with a first electro-hydraulic directional valve, a first hydraulic control one-way valve and a second hydraulic control one-way valve through a pipeline; a lower cavity of the lifting oil cylinder is communicated with a sequence valve through a pipeline which is provided with a second testing point; a left cavity of the first oil cylinder is communicated with a left cavity of the second oil cylinder through a pipeline and communicated with the sequence valve and a hydraulic control one-way valve; a right cavity of the first oil cylinder is communicated with a first one-way throttling valve; a right cavity of the second oil cylinder is communicated with a second one-way throttling valve through a pipeline; the second one-way throttling valve is communicated with the second hydraulic control one-way valve; the second hydraulic control one-way valve is communicated with a third electro-hydraulic directional valve; the first one-way throttling valve is communicated with the first hydraulic control one-way valve; the first hydraulic control one-way valve is communicated with a second electro-hydraulic directional valve; the sequence valve is communicated with the hydraulic control one-way valve and the first electro-hydraulic directional valve through a system oil drainage pipe L; the first electro-hydraulic directional valve, an overflow valve, the second electro-hydraulic directional valve, the third electro-hydraulic directional valve and a one-way valve are communicated through pipelines; the overflow valve is provided with a testing point through a pipeline, and the one-way valve is communicated with a system oil return pipeline; the third electro-hydraulic directional valve, the second electro-hydraulic directional valve and the first electro-hydraulic directional valve are all communicated with a system pressure oil pipe. The coke furnace machine furnace door lifting hydraulic control system is high in stability, works reliably, has a few faults and is low in maintenance frequency and low in cost.