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Gearbox high-speed switch valve
PendingCN121932419Asave spaceEasy and quick to makeOperating means/releasing devices for valvesServomotor componentsPole pieceVALVE PORT
Owner:BEIJING SHAOSHI TECH CO LTD
A manufacturing process for an integrated non-invasive oxygen mask
The application relates to a manufacturing process of an integrated non-invasive oxygen mask, which comprises the following steps: S1, cutting first raw materials and second raw materials required for manufacturing the oxygen mask; S2, opening air inlet holes and air outlet holes; S3, assembling and fixing a gas connecting piece; S4, manufacturing a neck warmer fabric; S5, manufacturing a neck warmer; S6, welding a neck warmer air nozzle; S7, integrally fixing the neck warmer; S8, manufacturing a barrel-shaped side wall; S9, welding an air leakage prevention barrier sheet; S10, manufacturing a containing body for containing a patient's head; and S11, assembling a gas charging and discharging device. The application has the advantages of simple and fast manufacturing, low cost, high efficiency, integration after complete manufacturing, no need for the patient to assemble by himself / herself, immediate wearing after taking out when the patient needs to use, manual pressing of the gas bag to charge the neck warmer with gas, close contact of the air leakage prevention barrier sheet on the neck of the patient by the convex part of the gas bag, formation of a closed space in the oxygen mask, good airtightness, simple and fast wearing and taking off.
Owner:DONGGUAN JUNYE PLASTIC PROD CO LTD
Method for preparing gold nanoparticle coated with yolk-shell structure silica
This invention discloses a method for preparing gold-coated silica nanoparticles with an egg yolk shell structure. The method involves adding trisodium citrate solution, tannic acid solution, and sodium carbonate solution to a flask and stirring. After heating, chloroauric acid solution is added, and stirring continues while maintaining a certain temperature to obtain a gold nanoparticle solution. The gold nanoparticle solution, anhydrous ethanol, ammonia, and hexadecyltrimethylammonium bromide are then added to the flask, stirred, and resorcinol is added, with continued stirring. After the reaction, formaldehyde is added dropwise, followed by tetraethyl orthosilicate. The reaction product is washed multiple times with deionized water by centrifugation, dried overnight in an oven, calcined, and then washed multiple times with deionized water by centrifugation and dried in an oven to obtain gold-coated silica nanoparticles with an egg yolk shell structure. This one-pot sol-gel method is low-cost, simple, and rapid, producing gold particles with uniform morphology, a uniform silica shell thickness, and a large internal space within the egg yolk shell.
Owner:JIANGSU XFNANO MATERIALS TECH CO LTD
A special safety component for reinforcing installation of a building first floor sewage pipe
The utility model discloses a special safety component for building first floor sewage pipe installation reinforcement, include: sewage pipe support piece (1), sewage pipe support piece (1) is used for supporting sewage pipe (4), sewage pipe limiting piece (2), sewage pipe limiting piece (2) is connected to the both sides of sewage pipe support piece (1) symmetry or asymmetry, wherein, one end of each sewage pipe limiting piece (2) is connected with the outer wall of sewage pipe support piece (1), and the other end of each sewage pipe limiting piece (2) is connected with the steel mesh (7) on reinforced terrace (6) through limiting rope (5) and is connected as a whole or is directly anchored into plain concrete terrace. The utility model simple structure, novel and reasonable design can effectively reduce the risk of sewage pipe settlement cracking or joint drop due to backfill soil settlement during the use of sewage pipe, and when installing, it is simple and quick, and can be directly installed on the construction site without the aid of other tools, saving time and being efficient.
Owner:YUNNAN CONSTR INVESTMENT HLDG GRP CO LTD
Novel preparation method of pyrazoloquinoline compound
PendingCN121930229Aefficient synthesisEasy to manufactureOrganic chemistryHydrazine compoundQuinolizine
The invention provides a novel preparation method of a pyrazoloquinoline compound, which comprises the following step: reacting a 1, 6-eneyne compound with a hydrazine compound under the condition of normal-pressure air to generate the pyrazoloquinoline compound. The synthesis method is simple and rapid in preparation process, and does not need inert gas protection and use of a catalyst, so that the synthesis method is expected to be used for industrial production.
Owner:HUNAN UNIV OF SCI & TECH