2results about How to "Improve fluid flow" patented technology

The utility model provides a kind of hydraulic engineering geological survey sampling device, it is related to hydrogeological engineering survey technical field, including cylinder, by coaxial setting upper sampling cavity, middle sampling cavity and lower sampling cavity constitute three-dimensional sampling space;Negative pressure source, it is communicated to each sampling cavity, directional negative pressure is formed when sampling.The utility model can realize high-precision stratified sampling without cross-contamination, by orthogonal distribution upper, middle and lower water inlet channel, make the water body of different depth in geological survey stationary surface water along independent path into corresponding sampling cavity, completely avoid interlayer mixing from physical structure, ensure stratified data authenticity;The utility model can optimize fluid flow, guarantee sample integrity and representativeness, the horn-shaped water inlet of anti-turbulence cover reduces flow velocity, combined with spiral guide flow channel, convert turbulent flow into stable laminar flow, reduce bubble disturbance and particulate matter settlement, significantly improve the originality of sample, meet high-precision water quality analysis demand.

This invention relates to a metal heat exchanger tube (1) comprising integral fins (2) formed on the outer side of the tube, having a fin bottom (3), fin side wings (4), and fin top (5), wherein the fin bottom (3) protrudes radially from the tube wall (10) and forms a channel (6) between the fins (2), the channel having a channel base (61) and additional structures (7, 71, 72) arranged spaced apart from each other in the channel. The additional structures (7, 71, 72) divide the channel (6) between the fins (2) into segments (8). The first additional structures (7, 71) are protrusions (71) that start from the channel base (61) and point radially outward. Radially outwardly positioned material protrusions (72) are arranged at the locations of the protrusions (71) as second additional structures (7, 72). The heat exchanger tube of the present invention has improved performance for liquids evaporating on the outer side of the tube.