Hydraulic hammer reduction system for railroad tank cars

Details Hydraulic hammer reduction system for railroad tank cars Hydraulic hammer reduction system for railroad tank cars

1986-05-05

1989-06-20

Chambers, A. Michael

Fluid handling

Systems

Multi-way valve unit

137347, 137590, F16K 1740

Patent

active

048401927

ABSTRACT:
A mechanical hydraulic dampening device having kinetic energy dissipating baffles in its interior with no moving parts, which device is included in a moving tank car carrying a liquid load, such as for example a railroad tank car, having a rupture disk assembly at the top of the tank to prevent fracturing of the tank due to hydraulic hammer action, the device being located in line between the rupture disk and the liquid load. When the tank is suddenly moved, the shifting liquid load passes through the pipe-like device, impacting against a series of longitudinally spaced, opposed, diverging, upwardly angled, flat plates each extending across more than 50% of the interior of the pipe body of the device, causing its energy and the hydraulic hammer action to be dissipated. In most, if not all, cases the presence of the mechanical baffling device prevents the rupture disk from rupturing, while maintaining the hydraulic hammer action down to acceptable limits, preventing spilling of any of the liquid load which otherwise would have occurred through the rupture disk. The device is relatively small, occupying and extending into far less than 1% of the total tank capacity.

REFERENCES:
patent: 630315 (1899-08-01), Barclay
patent: 1144306 (1915-06-01), Mock
patent: 2247566 (1941-07-01), Walton
patent: 2827071 (1958-03-01), Patterson
patent: 4347863 (1982-09-01), Keyes

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