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49results about How to "Eliminate surface tension" patented technology

Self-circulation open channel experimental device with teaching effect flow digital display function

The invention discloses a self-circulation open channel experimental device with the teaching effect flow digital display function. The self-circulation open channel experimental device comprises a self-circulation open channel experiment instrument, a differential pressure high-end liquid gas conversion cylinder, a differential pressure low-end liquid gas conversion cylinder, a differential pressure sensor and a microcomputer digital display instrument. The self-circulation open channel experiment instrument comprises a water delivery pipeline, and one segment of the water delivery pipeline is a differential pressure type flow signal generator used for generating differential pressure signals. The differential pressure high-end liquid gas conversion cylinder and the differential pressure low-end liquid gas conversion cylinder are connected with the differential pressure type flow signal generator. The differential pressure sensor is connected with the differential pressure high-end liquid gas conversion cylinder and the differential pressure low-end liquid gas conversion cylinder in a sealed mode and used for detecting the differential pressure between compressed air in the differential pressure high-end liquid gas conversion cylinder and compressed air in the differential pressure low-end liquid gas conversion cylinder. The microcomputer digital display instrument is connected with the differential pressure sensor and used for converting the differential pressure signals detected by the differential pressure sensor into flow. According to the self-circulation open channel experimental device with the teaching effect flow digital display function, in a preferred technical scheme, zero setting can also be performed in real time in the normal flow measurement experimental process, and the self-circulation open channel experimental device is a small-flow high-precision flow instrument used for experiments.
Owner:ZHEJIANG UNIV +1

Nondestructive cleaning device of graphic wafer capable of improving cleaning uniformity

The invention discloses a nondestructive cleaning device of a graphic wafer capable of improving the cleaning uniformity. An ultrasonic/megasonic generation mechanism and a bottom quartz device which are clung from top to bottom are arranged in a shell seal cavity, wherein the bottom quartz device comprises connected annular quartz microresonator protection ring and quartz microresonator array; the quartz microresonator array comprises a plurality of vertical rodlike quartz structures; the lower end of a groove of the annular quartz microresonator protection ring extends outside from the lower end surface of the shell; the lower end surface of the quartz microresonator array is not higher than that of the groove and the lower end surfaces of the rodlike quartz structures have different heights; and ultrasonic/megasonic energy of which the propagation direction is not vertical to the surface direction of the wafer can be selectively removed through the quartz microresonator array and the ultrasonic/megasonic energy on the surface of the graphic wafer can be uniformly distributed, thereby achieving a uniform and nondestructive cleaning effect in a random region in the overall graphic wafer range within certain cleaning time.
Owner:BEIJING SEVENSTAR ELECTRONICS CO LTD

Self-circulation Bernoulli experimental device with teaching effect flow digital display function

The invention discloses a self-circulation Bernoulli experimental device with a teaching effect flow digital display function. The self-circulation Bernoulli experimental device comprises a self-circulation Bernoulli experimental instrument, wherein the self-circulation Bernoulli experimental instrument comprises a Bernoulli experimental pipeline, a pressure difference high-end liquid gas converting tube, a pressure difference low-end liquid gas converting tube, a pressure difference sensor and a microcomputer digital display meter; one section in the Bernoulli experimental pipeline is a pressure difference type flow signal generator used for generating pressure difference signals; the pressure difference high-end liquid gas converting tube and the pressure difference low-end liquid gas converting tube are connected with the pressure difference type flow signal generator; the pressure difference sensor is connected with the pressure difference high-end liquid gas converting tube and the pressure difference low-end liquid gas converting tube in a sealed way and is used for detecting the pressure difference; the microcomputer digital display meter is connected with the pressure difference sensor and is used for converting pressure difference signals detected by the pressure difference sensor into flow. The self-circulation Bernoulli experimental device has the advantages that the teaching effect flow digital display function is achieved; in the optimal technical scheme, the self-circulation Bernoulli experimental device with the teaching effect flow digital display function can also realize the real-time zero setting function in the normal flow measurement experiment process and is a low-pressure-difference high-precision flow instrument.
Owner:ZHEJIANG UNIV +1

Water containing plate for heat exchanger

The invention relates to the technical field of heat exchangers, in particular to a water containing plate for a heat exchanger. The water containing plate for the heat exchanger comprises a bottom plate and a water guiding plate, wherein the water guiding plate is arranged on the periphery of the bottom plate in a surrounding way and can be detachably connected with the bottom plate; multiple first notches are arranged on the peripheral side of the bottom plate; the water guiding plate is provided with multiple second notches corresponding to the first notches; the first notches and the corresponding second notches enclose to form multiple drain holes for draining; and a hole wall of each drain hole downwards extends out of a flow guiding part. Compared with the prior art, the multiple drain holes are formed between the water guiding plate and the bottom plate and are formed in the periphery of the bottom plate in a surrounding way, the drain holes extend out of the flow guiding part,and during a draining process, the partial adhesion capacity and the surface tension of water are eliminated through the flow guiding part, so that defrosting water and condensation water can be drained out of the water containing plate along the flow guiding part, the water can be drained smoothly, and the occurrence of the phenomenon that the drain holes are secondarily frozen is avoided; and in addition, an electric auxiliary heating part can be omitted, so that the manufacturing cost is reduced, and the potential safety hazard is eliminated.
Owner:GUANGDONG HIWAVE TECH

Double-cylinder type high-precision liquid velocity-flow meter and velocity-flow value output method

The invention discloses a double-cylinder type high-precision liquid velocity-flow meter comprising a differential-pressure type velocity-flow signal generator, a differential-pressure high liquid-gas conversion cylinder, a differential-pressure low liquid-gas conversion cylinder, a differential pressure sensor and a micro-computer. Both the cylinders are provided with air exhaust nozzles. The differential pressure sensor detects differential pressure of compressed air in the differential-pressure high liquid-gas conversion cylinder and compressed air in the differential-pressure low liquid-gas conversion cylinder. The micro-computer converts the differential pressure signals, detected by the differential pressure sensor, into velocity and flow. The double-cylinder type high-precision liquid velocity-flow meter integrates functions of a flow meter and a velocity meter, and preferably, functions in zeroing and freely selecting velocity or flow value for digital output. The invention further discloses a method for outputting the velocity-flow values converted from voltage analog signals in the same machine. According to the method, the double-cylinder type high-precision liquid velocity-flow meter is adopted, and the function and effect that the velocity/flow value digital display is freely selected in the same machine.
Owner:ZHEJIANG UNIV +1

Method for conducting drug loading by adopting SC-CO2 (supercritical carbon dioxide) extraction device with GO (graphene oxide) or CNTs (carbon nano tubes) as carrier

The invention provides a method for conducting drug loading by adopting an SC-CO2 (supercritical carbon dioxide) extraction device with GO (graphene oxide) or CNTs (carbon nano tubes) as a carrier, and relates to a method for conducting the drug loading with GO or CNTs as the carrier. The method comprises steps as follows: the weighed carrier is put in an extraction tank of a supercritical extraction device, a weighed drug is dissolved in absolute ethyl alcohol, a mixed solution is obtained and transferred into an entrainer tank of the supercritical extraction device, the mixed solution in theentrainer tank is conveyed by a delivery pump to the extraction tank containing the carrier, pressure and temperature of the extraction tank are adjusted, the drug loading is performed under the conditions of certain raw material ratio and loading time, and a drug-loaded product is obtained and dried for 22-26 h at the room temperature. Supercritical CO2 is utilized for drug loading, the problemof pollution or separation of a solvent used for drug loading with a conventional method is solved, and the drug loading capacity is increased. The method is suitable for the drug loading with GO or CNTs as the carrier.
Owner:JIAMUSI UNIVERSITY

Thin spray sealing material and thin spray sealing method, open powder spraying equipment

The invention provides a thin spray sealing material, which contains 15-55% of RD type polymer powder, 30-60% of inorganic filler, 14.5-40% of inorganic film-forming agent, and 0.5-5% of other auxiliary agents by weight percentage. %. The thin spray sealing material of the invention adopts RD type polymer powder as the main film-forming component, and can be sprayed to form a film by adding water, without by-products, VOCs and reaction heat, convenient and inexpensive to install, transport, store and use; Film-forming, ductility, permeability, environmental protection, flame retardancy, and can achieve sufficient strength, can replace shotcrete support in bolt-and-shot support technology. The invention also provides an open-type powder injection equipment with simple structure, low noise and no dust emission, which is suitable for the use of the thin-spraying sealing material of the invention, which includes a venturi gas-material mixing pipe, a blanking pipe, and a compressed air source. , the spray gun is communicated with the outlet of the venturi gas-material mixing pipe through the conveying pipe, and the spray gun is also provided with a spray nozzle which is communicated with the spray gun and is used for spraying atomized water into the spray gun.
Owner:NANJING INST GENERAL INST OF COAL SCI

Self-circulation open channel experimental device with teaching effect flow digital display

The invention discloses a self-circulation open channel experimental device with the teaching effect flow digital display function. The self-circulation open channel experimental device comprises a self-circulation open channel experiment instrument, a differential pressure high-end liquid gas conversion cylinder, a differential pressure low-end liquid gas conversion cylinder, a differential pressure sensor and a microcomputer digital display instrument. The self-circulation open channel experiment instrument comprises a water delivery pipeline, and one segment of the water delivery pipeline is a differential pressure type flow signal generator used for generating differential pressure signals. The differential pressure high-end liquid gas conversion cylinder and the differential pressure low-end liquid gas conversion cylinder are connected with the differential pressure type flow signal generator. The differential pressure sensor is connected with the differential pressure high-end liquid gas conversion cylinder and the differential pressure low-end liquid gas conversion cylinder in a sealed mode and used for detecting the differential pressure between compressed air in the differential pressure high-end liquid gas conversion cylinder and compressed air in the differential pressure low-end liquid gas conversion cylinder. The microcomputer digital display instrument is connected with the differential pressure sensor and used for converting the differential pressure signals detected by the differential pressure sensor into flow. According to the self-circulation open channel experimental device with the teaching effect flow digital display function, in a preferred technical scheme, zero setting can also be performed in real time in the normal flow measurement experimental process, and the self-circulation open channel experimental device is a small-flow high-precision flow instrument used for experiments.
Owner:ZHEJIANG UNIV +1
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