Auxiliary pressure relief reservoir for crash barrier

摘要

A crash barrier system is provided that generally includes a hydraulic actuator driven piston operably connected to a hydraulic circuit and the crash barrier. In general, the hydraulic circuit includes a normal-UP and normal-DOWN section, an emergency-UP section, and an overpressure relief sub-system. In order to automatically provide corrective action in the event of an overpressure condition, the overpressure relief sub-system includes an external pressure relief valve that is connected to the hydraulic circuit. Upon occurrence of condition that causes the hydraulic fluid pressure to exceed a predetermined value, hydraulic fluid is released through the pressure relief valve to maintain the pressure at or below the predetermined value.

主权项

1. A crash barrier system including a hydraulic actuator driven piston structurally connected to a crash barrier and crash emergency barrier rise sub-system in selective fluid communication with the hydraulic actuator driven piston via an accumulator line and including an emergency hydraulic fluid line having a recharged state in which hydraulic fluid at a pressure greater than the pressure of hydraulic fluid in the accumulator line, a pneumatic container containing hydraulic fluid and pressurized gas, and an emergency-UP solenoid check valve, the improvement comprising:
an overpressure relief sub-system in fluid communication with the emergency hydraulic fluid line, the overpressure relief sub-system including an external pressure relief valve in fluid communication with the emergency hydraulic fluid line through an external overpressure accumulation line.