4results about How to "Reduce turbulence intensity" patented technology

The invention provides a fine fraction flotation machine with an inflation system and a using method of the fine fraction flotation machine. The fine fraction flotation machine comprises a groove body, a foam groove, a scraper component, an ore pulp annular pipe, an air annular pipe, a plurality of inflator assemblies and a tailing box. The ore pulp ring pipe and the air ring pipe are concentrically arranged at the top of the tank body, and the inflator assemblies are evenly arranged along the ore pulp ring pipe and used for fully mixing ore pulp and air in a pipeline and shearing the mixture to form fine bubbles, and then the fine bubbles are evenly sprayed into the cross section of the tank body through the branch pipes. No mechanical stirring exists in the tank body, turbulent flow is rapidly weakened after mixed fluid enters the tank body, and efficient static separation of mineralized bubbles and gangue minerals is achieved. The collision probability and the recovery rate of fine-grain minerals can be remarkably improved, gangue entrainment is effectively restrained, the concentrate grade is guaranteed, the inflation amount is adjustable, the structure is simple, operation is stable, and the flotation device is suitable for flotation operation of the high-concentration fine-grain minerals.

The utility model discloses a kind of guide vanes for EGR pipe, it is related to automobile exhaust treatment technical field.The utility model includes mounting sleeve, the first installation ring is fixedly connected in mounting sleeve inside;The first installation ring one side is provided with limiting mechanism.The utility model is meshed with the tooth block of the inner ring of limiting ring and the tooth slot of installation disc outer ring, can effectively limit the axial displacement and unexpected rotation of installation disc under the action of airflow, avoid the unstable problem of guide flow caused by jumping or shaking of turbine blade, the air outlet channel being set between limiting ring and mounting sleeve, high-speed exhaust can be guided to flow to the working area of turbine blade, reduce airflow dispersion loss, the hollow structure of wind deflector and two side slope design, airflow entering mounting sleeve can be primarily rectified, reduce intake turbulence intensity, reduce airflow and pipe wall collision loss, further reduce pressure loss, improve guide efficiency.

This application provides a novel ship control hull mold casting system, relating to the field of metal casting molds. It includes a gating structure on one side of the cavity and an venting structure on the remaining sides of the cavity. The gating structure is stepped, positioned at the top of the cavity and higher than the cavity itself. The gating structure includes a riser, a main channel, two branch channels, and multiple sub-channels connected sequentially along the pouring direction. The two branch channels extend obliquely to both sides from the ends of the main channel, with their widths gradually decreasing. Each branch channel branches out two spaced sub-channels on its side facing the cavity. The height of the sub-channels gradually decreases, and their width gradually increases at their ends. The height of the sub-channels is lower than the height of the branch channels, and the height of the branch channels is lower than the height of the main channel. The venting structure includes multiple venting slag bags spaced apart and connected to the bottom of the outer side of the cavity. This application effectively solves the technical problems of turbulence and slag inclusions easily generated by traditional flow channels.

The utility model relates to the technical field of building ventilation systems, in particular to a noise reduction structure of a fresh air system pipeline. The utility model provides a fresh air system pipeline noise reduction structure which comprises a pipeline body and a noise reduction assembly, the noise reduction assembly comprises a plurality of noise reduction units arranged at intervals in the axial direction of the pipeline body, and each noise reduction unit is composed of a supporting frame, a porous sound absorption layer, a resonant cavity array and a flow guide cone. The supporting frame is the same as the inner wall of the pipeline body in shape and is fixed to the inner wall of the pipeline body, the porous sound absorption layer is attached to the inner side of the supporting frame, the resonant cavity arrays are located on the two sides of the porous sound absorption layer, and corresponding clamping grooves are formed in the positions, located on the porous sound absorption layer, of the supporting frame. The two ends of the resonant cavity array are fixed to the clamping grooves of the adjacent supporting frames respectively, the flow guide cone is located in the center area of the porous sound absorption layer, and the cone top of the flow guide cone points to the airflow direction.