4results about How to "Achieve directional flow" patented technology

This invention discloses a composite preform for aluminum-steel induction brazing, a welding method, and an anode guide rod assembly. The composite preform includes an aluminum base skeleton and annular brazing filler metal on its upper and lower surfaces. The aluminum base skeleton is disc-shaped with through holes, through which the annular brazing filler metal is connected as a whole. The annular brazing filler metal includes an inner ring wetting zone, a middle ring control zone, and an outer ring compensation zone, with the solid-liquid phase temperature of the brazing filler metal increasing sequentially in these three zones. During welding, a two-stage induction heating process is employed: first, the inner ring brazing filler metal is fully softened and spread in the central region; then, the outer ring brazing filler metal is completely melted and fed to the joint edge, while a controlled Fe-Al-Si reaction layer is formed at the steel-side interface through the middle ring control zone. This invention transforms the inherent radial temperature difference of induction heating into a step-by-step melting process window, simultaneously solving the problems of insufficient central spreading, edge brazing filler metal loss, and uncontrolled brittle phase at the interface. It is suitable for large-section connections between anode steel claws and aluminum guide rods in the electrolytic aluminum industry.

The utility model discloses a kind of liquid metering devices, including support frame, measuring box, sampling mechanism and storage mechanism, wherein, measuring box is set on support frame, liquid inlet pipe is equipped on measuring box, sampling mechanism is set on measuring box, storage mechanism includes connecting assembly, storage box, discharge assembly, exhaust component and first drive mechanism, wherein, storage box is set on measuring box by connecting assembly, and be located below support frame, discharge assembly is set on storage box, exhaust component is set on storage box, first drive mechanism is set on storage box. Therefore, improve piston movement stability and precision, maintain piston air tightness, cooperate with the guidance flow of multiple one-way valve, reduce liquid volume storage, prestore after liquid sampling and discharge, to improve the measurement precision of liquid.

The present application relates to the technical field of regulating valve, in particular to an intelligent electric regulating valve, comprising a valve body, a flow limiting component and a regulating component. In the opening process of the valve, the regulating component is self-adaptively adjusted according to the medium pressure, so that the flow limiting component opens the first flow port later than the second flow port. In the closing process of the valve, the regulating component is self-adaptively adjusted according to the medium pressure, so that the flow limiting component closes the first flow port earlier than the second flow port. Therefore, through the self-adaptive linkage of the regulating component and the medium pressure, the opening and closing timing of the first flow port and the second flow port is accurately controlled, ensuring that the second flow port is closed, the first flow port must be in the closed state, forming a double sealing guarantee, and improving the sealing reliability.

The application belongs to the technical field of micro-fluidic chip, and particularly relates to an integrated micro-fluidic card box; the integrated micro-fluidic card box comprises a first solution storage part, a suction accessory, a second solution storage part and a reaction part; the bottom surface of the first solution storage part is rotationally connected with the top surface of the suction accessory, the bottom surface of the suction accessory is rotationally connected with the top surface of the second solution storage part, and the bottom surface of the second solution storage part is abutted with the top surface of the reaction part; a second channel is arranged on the first solution storage part in a penetrating mode, a second flow channel is arranged on the suction accessory, and a second through hole is arranged at one end of the second flow channel in a penetrating mode; when a single sample nucleic acid is detected, a second flow channel and a second channel formed by an exhaust passage are used for feeding a lysis solution, feeding a cleaning solution, feeding an eluent and sample loading, only one driving pump is needed to control the solution flow process; the driving pump and the external pipeline only pass gas but not liquid, so that solution residues when passing through the pump and the pipeline are avoided, and pollution is avoided; a plurality of micro-fluidic chips are connected with the driving pump and the controller, so that multiple samples can be simultaneously detected, and the detection efficiency is improved.