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95results about How to "Reduce pooling" patented technology

Stepped volute structure, centrifugal fan and air blowing device

The invention provides a stepped volute structure, a centrifugal fan and an air blowing device. In the stepped volute structure, a plurality of volute tongues and volute volute-tongue side wall surfaces are arranged in a stepped mode and extend in the thickness direction from an air inlet to a shell. The distances from the volute volute-tongue side wall surfaces to a front blade disc are graduallyincreased, so that on the height volute section nearby the front blade disc, the overall width of a volute diffusion section is reduced, namely the volute tongues and the volute volute-tongue side wall surfaces are closer to a volute throat side wall surface. Since high-speed airflow impact is close to the volute-tongue side wall surfaces, the situation that a negative pressure area is generatedlike a traditional centrifugal volute is avoided, generation of whirling airflow is restrained, and thus an eddy current whirling area of a diffusion section of the traditional centrifugal volute is eliminated. After the whirling airflow area on the height volute section nearby the front blade disc is cut off, the disturbance of the whirling airflow on normal acting and air exhausting of the volute is eliminated, and thus the air volume is increased; and meanwhile eddy current noise disappears accordingly, and thus noise is reduced.
Owner:GREE ELECTRIC APPLIANCES INC

Method for preparing polyethyleneimine modified PLGA (poly(lactic-co-glycolic acid)) loading hollow micro-capsules based on polyethylene glycol and folic acid grafting

The invention relates to a method for preparing polyethyleneimine modified PLGA (poly(lactic-co-glycolic acid)) loading hollow micro-capsules based on polyethylene glycol and folic acid grafting. The method comprises the following steps: dissolving PLGA in an oil phase, and dissolving doxorubicin hydrochloride DOX in super-pure water to obtain a water phase; mixing the oil phase and the water phase, and performing ultrasonic treatment to obtain W/O emulsion; adding the W/O emulsion in a PVA (polyvinyl alcohol) solution, and homogenizing to obtain W/O/W emulsion; adding the W/O/W emulsion into an isopropanol water solution, stirring by magnetic force, and centrifugally cleaning to obtain PLGA-DOX microcapsules; dispersing the microcapsules in water; transforming into a PEI-PEG-FA (polyetherimide-polyethylene glycol-folic acid) polymer water solution, stirring and mixing, centrifugally cleaning, and lyophilizing to obtain the polyethyleneimine modified PLGA loading hollow micro-capsules. The method is simple in preparation process, and the experiment condition is normal temperature and normal pressure; the material prepared by the method is excellent in drug sustained-release performance and excellent in tumor cell target treatment effect, and reference is provided to development of multi-functional target medicinal preparations.
Owner:DONGHUA UNIV

Dual-hydraulic drum type braking device

The invention discloses a dual-hydraulic drum type braking device which comprises a brake disc sleeved with a hub. A left brake shoe and a right brake shoe are symmetrically arranged in the brake disk. The top end of the left brake shoe and the top end of the right brake shoe are connected through an upper telescopic hydraulic cylinder. The bottom end of the left brake shoe and the bottom end of the right brake shoe are connected through a lower telescopic hydraulic cylinder symmetrical to the upper telescopic hydraulic cylinder. The upper end of the left brake shoe and the upper end of the right brake shoe are connected with the two ends of an upper extension spring respectively. The lower end of the left brake shoe and the lower end of the right brake shoe are connected with the two ends of a lower extension spring respectively. By arranging the upper telescopic hydraulic cylinder and the lower telescopic hydraulic cylinder which are symmetrical to each other at the top ends and the bottom ends of the left brake shoe and the right brake shoe, during braking, the upper ends and the lower ends of the left brake shoe and the right brake shoe are moved outwards at the same time, the contact area of the brake shoes and the hub is large, the concentration of friction force in the braking process is reduced, the problem that the brake shoes dissipate heat in an excessive concentrated mode when the friction force is excessively concentrated is solved, and durability of the brake shoes is improved.
Owner:QINZHOU UNIV

Model test system for researching instability critical conditions of vegetation-covered slopes under action of rainfall

The invention discloses a model test system for researching the instability critical condition of a vegetation-covered slope under the action of rainfall. A vegetation-covered slope model is arrangedin a centrifugal environment double-layer seepage model box; a graded rainfall feedback simulation system is used for simulating specific rainfall intensity and duration requirements and inducing thechange of a moisture field condition in the slope body of the vegetation cover slope body model; an artificial root strain analysis system simulates the physical soil fixation effect of the root system on the slope surface and the regulation and control effect of the matrix suction force; a slope surface crack high-speed camera system is used for recording the whole rainwater infiltration and slope surface scouring conditions of the test slope body and clearly capturing the whole process of slope surface crack development, extension and penetration; and a rock-soil body moisture content monitoring system is used for monitoring the response condition of the slope body moisture field in real time in the whole process under different rainfall and artificial root working conditions. The systemis used for carrying out a model test for researching the instability critical condition of the vegetation covered slope under the rainfall condition, and an effective test means is provided for evaluating the influence of vegetation on the slope stability under the rainfall condition.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI

High-impermeability continuous roof system

The invention discloses a high-impermeability continuous roof system, and belongs to the technical field of buildings. A flush side-attaching water guide column is arranged at the joint of a roof panel body, hydrophobic sealing strips are conventionally arranged on the inner side of the side-attaching water guide column for seepage prevention, and rain blocking steel wires are arranged in advanceto intercept and guide rainwater, so that gathering of the rainwater at the hydrophobic sealing strips is reduced; meanwhile, seepage-sensing expansion rods are introduced into the hydrophobic sealingstrips, magnetic drive variable anti-seepage balls and water absorption balls are arranged at the corresponding ends, the arc-shaped characteristic and the water swelling characteristic of the seepage-sensing expansion rods are utilized, and once water seeps into a joint, the anti-seepage action of the seepage-sensing expansion rods is triggered immediately, the seepage-sensing expansion rods areexpanded and force the magnetic drive variable anti-seepage balls to move in the preset extending direction, so that the magnetic drive variable anti-seepage balls on the adjacent hydrophobic sealingstrips are connected under the magnetic action; and meanwhile, the hydrophobic sealing strips are driven to deform in a flat s mode, a natural anti-seepage belt is formed, and the anti-seepage performance of the continuous roof system is greatly improved.
Owner:深圳市华贝设计顾问有限公司

High-accuracy microbial detection chip

The invention provides a high-accuracy microbial detection chip. Through arranging sidewalls of microreaction chambers as hydrophilic surfaces, forms of sample liquid droplets in the microreaction chambers are changed, and the sample liquid droplets can have flattened oil-water interfaces, so that the degree of convergence or divergence of radiated light at the oil-water interfaces is lowered, then, the problem of mutual interference of fluorescence signals of adjacent microreaction chambers is weakened, and a fluorescent detection result can be more accurate; and further, incomplete gas exhausting due to the fact that oily filling liquid difficultly enters the microreaction chambers during gas exhausting and a bubble optical false appearance caused by the incomplete gas exhausting are prevented. The invention further provides a microreaction chamber sidewall with changeable surface properties, by virtue of a ring electrode and a hydrophobic coating wrapping the outside of the ring electrode, surface characteristics of the microreaction chamber sidewall can be selectively adjusted according to an on-off state between the ring electrode and a round point electrode, so that the microreaction chamber sidewall is allowed to form good wetting with the oily filling liquid during gas exhausting and form good wetting with the aqueous sample liquid droplets during sample introduction.
Owner:北京陆桥技术股份有限公司

Environmentally-friendly slope-attaching type trash rack and building method thereof

The invention relates to an environmentally-friendly slope-attaching type trash rack and a building method thereof and belongs to a structural style of trash rack arrangement. The trash rack comprises a hoist chamber. The contact portions of trash rack piers and a mountain are of step shapes. An included angle alpha between the trash rack piers and the horizontal plane is from 60 degrees to 80 degrees. A connecting beam is connected between the two trash rack piers. Each trash rack pier is provided with a trash rack gate groove. The connecting beam is connected with the mountain in a contacting mode. The trash rack piers or the connecting beam and the mountain are fixedly connected through anchoring rods. Trash rack gates are connected with the trash rack gate grooves in a sliding mode. The trash rack has the advantages of being simple in structure, reliable in operation, and suitable for the geography with the natural side slope grade of 60 degrees to 80 degrees, natural slope covering layers and the geological condition of shallow rock mass weathering. The trash rack achieves the purpose of trash holding, attention is paid to the combination of the trash rack and the natural mountain slope, the requirement of the structural functionality is met, the purpose of ecological environmental protection is achieved, and the trash rack has the good application prospect.
Owner:CHINA WATER NORTHEASTERN INVESTIGATION DESIGN & RES

Assembled ecological floating bed suitable for rain source type riverway

The invention discloses an assembled ecological floating bed suitable for rain source type riverway. The assembled ecological floating bed comprises a floating bed body, a floating bed side slope fixing traction device and aquatic plants, the floating bed body comprises a flexible frame, streamline end frames, an integrated floating block and assembling elements, the flexible frame and the assembling elements are made of nylon materials, and the assembled ecological floating bed is good in stability, economical, practical and convenient to operate; the streamline end frames can reduce water flow resistance and reduce water flow viscous resistance energy consumption, so that the water flow impact resistance is enhanced. The integrated floating block comprises a floating plate and a plantingpot, integrity and stability are good, installation and replacement are convenient, the planting pot is of an injection molding hollowed-out type, and resistance of water flow to the floating bed canbe effectively reduced. The floating bed side slope fixing traction device comprises a traction element and a fixing pile, the position can be automatically adjusted according to the water level andwater flow conditions of a river channel water body, and high anti-scouring and anti-overturning capacity is achieved. The assembled ecological floating bed has the characteristics of good stability,good decontamination effect, strong stormy wave resistance, long service life and the like.
Owner:JIANGXI THERMAL POWER CONSTR CORP
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