Fluid handling – Destructible or deformable element controlled – Destructible element
Patent
1989-06-20
1990-07-03
Fox, John C.
Fluid handling
Destructible or deformable element controlled
Destructible element
137347, 137590, F16K 1740
Patent
active
049382470
ABSTRACT:
A mechanical hydraulic dampening device (100) having kinetic energy dissipating baffles (2) in its interior with no moving parts, which device (100) is included in a moving tank car carrying a liquid load, such as for example a railroad tank car (6), having a rupture disk assembly (9) at the top of the tank (6) to prevent fracturing of the tank (6) due to hydraulic hammer action, the device (100) being located in line between the rupture disk and the liquid load. When the tank (6) is suddenly moved, the shifting liquid load passes through the pipe-like device (100), impacting against a series of longitudinally spaced, opposed, diverging, upwardly angled, flat plates (2) each extending across more than 50% of the interior of the pipe body (1) of the device (100), causing its energy and the hydraulic hammer action to be dissipated. In most, if not all, cases the presence of the mechanical baffling device (100) 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 (100) is relatively small, occupying and extending into far less than 1% of the total tank capacity.
REFERENCES:
patent: 630315 (1899-08-01), Barclay
patent: 2247566 (1941-07-01), Walton
patent: 2827071 (1958-03-01), Patterson
patent: 4347863 (1982-09-01), Keyes
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