| 摘要 |
<p>A mobile tank car or like vehicle (70) includes a mechanical hydraulic dampening device (30) having kinetic energy dissipating baffles in its interior with no moving parts. The moving tank car carrying a liquid load, such as for example a railroad tank car, including a rupture disc assembly (21) or a safety relief valve at the top of the tank to prevent fracturing of the tank due to excessive pressure. The dampening device is located in line between the rupture disk assembly or safety valve and the liquid load. When the tank is suddenly moved, the shifting liquid load passes through the pipe-like device, impacting against impact surfaces of a baffle, 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 and/or safety relief valve from prematurely operating, by maintaining the hydraulic hammer action down to acceptable limits, preventing the spilling of any of the liquid load which otherwise would have occurred through the rupture disk and/or safety relief valve. The device is relatively small, occupying and extending into far less than 1% of the total tank capacity. The dampening device is of a plastic material having a specially configured body that includes a plastic core with opposed surfaces each carrying a plurality of baffles.</p> |
