Hydraulic sub-station

Abstract

The invention provides a hydraulic sub-station. The hydraulic sub-station comprises a hydraulic sub-station skid body, a hydraulic sub-station trailer, a natural gas buffer bottle and a gas-filling machine. The hydraulic sub-station skid body and the hydraulic sub-station trailer are connected through a hydraulic high-pressure hose, the hydraulic sub-station trailer is connected with the natural gas buffer bottle through a natural gas high-pressure hose, the natural gas buffer bottle and the gas-filling machine are connected through an outlet pipeline, and the hydraulic sub-station controls opening of a valve through a PLC automatic control system. The hydraulic sub-station skid body comprises a hydraulic oil tank, a first hydraulic pump, a second hydraulic pump, a first valve block, a second valve block and a reversing valve set. The hydraulic sub-station trailer comprises a plurality of steel bottles divided into two sets. The two hydraulic pumps can operate separately and can also operate simultaneously, thus the situation that the two hydraulic pumps are started frequently when the gas-filling load of a gas-filling station is changed is avoided, power consumption is reduced bya large margin, the gas-filling speed of the sub-station is increased, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of natural gas filling devices, in particular to a hydraulic substation. Background technique [0002] Hydraulic natural gas vehicle refueling substations have been widely used nationwide due to their advantages of less equipment, small footprint, short construction period and trailer unloading rate as high as 95%-97%. [0003] With the increase in the number of natural gas vehicle refueling sub-stations, the competition among refueling stations is intensifying. In order to shorten the refueling time of vehicles and reduce the waiting time for refueling, especially to meet the refueling needs of large-capacity natural gas vehicles such as buses and intercity buses, the technology of large-displacement hydraulic natural gas vehicle refueling substations has emerged as the times require. [0004] Displacement 3000Nm 3 The dual-pump hydraulic natural gas vehicle refueling substation system per hour has become...

AI Technical Summary

Problems solved by technology

The sub-station pressurization system consists of double pumps with equal displacement. The displacement of each hydraulic pump is 1500Nm3 / h. When the gas filling load of the gas filling station is low, the hydraulic pump starts and stops frequently, and the power consumption is too high; Due to the limitations of the hydraulic natural gas vehicle refueling substation system, a single hydraulic pump cannot operate. Regardless of whether the refueling load of the gas station is high or low, the two hydraulic pumps will start and stop sequentially after the PLC control system runs. Start and stop very frequently, resulting in a lot of power waste and low work efficiency

During the operation of the two hydraulic pumps, air bubbles will be generated in the oil suction pipeline, which will cause vibration and noise in the slightest, and cavitation in severe cases, causing damage to the hydraulic pumps and hydraulic valves, which shortens the life of the hydraulic pumps and hydraulic valves and reduces the hydraulic pressure. Substation exhaust volume

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