The invention belongs to the technical field of
compressed natural gas filling, and particularly relates to an integrated hydraulic
station which realizes high integration of an
oil tank,
plunger pumps, motors, a valve block, a cooler, an instrument and a sensor. The reversing function of hydraulic oil is provided through cooperation of an electro-hydraulic
reversing valve and a proximity switch on a
hydraulic cylinder, the functions of circulating heating of the low-temperature hydraulic oil, discharging of the high-pressure hydraulic oil and avoiding the hydraulic oil channeling back betweenthe double pumps are realized through cooperation of an unloading valve, a one-way valve and the electro-hydraulic
reversing valve in the valve block, the high-
pressure difference automatic stop function and the high-pressure gas discharging function are provided,
combustible gas leakage and expansion deformation of the
oil tank which cannot be recovered caused by high-pressure gas channeling back are avoided, the functions of low oil level monitoring alarm,
temperature monitoring alarm and low
oil temperature automatic circulating heating before starting of the hydraulic
oil tank are provided, a three-way
ball valve is adopted to replace an oil return valve block in the aspect of cooling oil return of the hydraulic oil, thus the oil return
control function is realize, and the cost and space of the hydraulic
station are also reduced.