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92results about How to "Uniform distribution" patented technology

Jetting glue dispensing valve device and jetting glue dispensing method

The invention discloses a jetting glue dispensing valve device and a jetting glue dispensing method. The jetting glue dispensing valve device comprises a jetting glue dispensing valve, a glue supply pipeline and a glue supply valve, wherein a turntable capable of being closed / opened quickly is mounted at the bottom of the glue supply valve. During a glue jetting course, the glue supply valve is closed, and a channel allowing a glue solution to flow back to the glue supply valve from the glue supply pipeline is intercepted, so that glue jetting with precise volume is achieved. After a single glue jetting course is finished, the glue supply valve is opened, and the glue supply channel is opened for filling, so that continuous jetting of the glue solution is achieved. When the device and the jetting glue dispensing method are used for glue dispensing, no backflow occurs, so that an effective utilization rate of striker movement is increased, and jetting of a high-viscosity glue solution is facilitated; the device is simple in structure and easy to process; the turntable has the characteristic of periodic rotation, and can stir the glue solution, so that precipitation of fluorescent powder in the glue solution is avoided effectively; the fluid velocity in the jetting glue dispensing valve is distributed more uniformly; and the glue dispensing quality is ensured.
Owner:CENT SOUTH UNIV

Heat-exchange tube

The invention discloses a heat-exchange tube and belongs to the field of heat enhancement of heat transfer and energy saving. The heat-exchange tube comprises a tube body and a helical fin group, wherein the helical fin is formed by a first helical fin, a second helical fin and a third helical fin, first grooves are formed on the upper portion of the first helical fin, helical fin top portions among the first grooves form first T-shaped fin platforms; second grooves are formed on the upper portion of the second helical fin, helical fin top portions among the second grooves form second T-shaped fin platforms; third grooves are formed on the upper portion of the third helical fin, and helical fin top portions among the third grooves form third T-shaped fin platforms. The heat-exchange tube is characterized a first distance between the top surfaces of the first T-shaped fin platforms and a fin root portion of the first helical fin is smaller than a second distance between the top surfaces of the second T-shaped fin platforms and a fin root portion of the second helical fin, the second distance is smaller than a third distance between the top surfaces of the third T-shaped fin platforms and a fin root portion of the third helical fin, and find grooves are formed in the spaces between the first helical fin and the second helical fin, the second helical fin and the third helical fin, and between the third helical fin and the first helical fin. By the aid of the heat-exchange tube, heat exchange efficiency for falling film evaporation is improved.
Owner:JIANGSU CUILONG PRECISION COPPER TUBE CORP
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