5results about How to "Flexible preparation process" patented technology

The invention relates to an epoxy resin pouring type transformer with built-in microcirculation cooling channels and a heat dissipation method of the epoxy resin pouring type transformer, and belongs to the technical field of power transformers. The epoxy resin pouring type transformer comprises an iron core, a low-voltage winding, a high-voltage winding and a heat dissipation shell, the low-voltage winding and the high-voltage winding are completely impregnated and wrapped by an epoxy resin composite material through a vacuum pouring process, an integrated epoxy resin pouring body is formed after curing, and a three-dimensional communicated bionic microcirculation cooling channel network is arranged in the epoxy resin pouring body; the heat dissipation shell is in close contact with the outer surface of the epoxy resin pouring body through the high-heat-conductivity insulating medium. According to the invention, the heat dissipation efficiency can be remarkably improved, and a cooling medium (air) is directly guided to a microscopic area around the winding conductor through a three-dimensional communicated and tree-shaped fractal bionic microcirculation cooling channel network, so that the effective heat exchange area and the heat exchange strength are greatly increased, and internal heat can be accurately and efficiently taken away.

This invention discloses a single-layer soft dental membrane and method for dental treatment or oral protection, belonging to the field of dental materials technology. The membrane is made of thermoplastic polyurethane elastomer (TPU) with a microphase separation structure and a hydrophilic modified layer containing polydopamine and hydrophilic polymer on its surface. The membrane has a Shore hardness of 75A-90A, a tensile strength of 15-50MPa, an elongation at break ≥500%, and a thickness of 0.5-6.0mm. The preparation method includes TPU drying, extrusion molding, plasma treatment, and hydrophilic coating impregnation reaction. The membrane of this invention has flexibility, durability, antibacterial properties, and high transparency, and its comprehensive performance is superior to that of existing EVA membranes. It can be used in dental whitening trays, sports mouthguards, or oral ulcer protection patches.

This invention relates to the field of rock material performance testing, and in particular to a sample preparation and testing method for studying the self-closing characteristics of rock fractures. Addressing the limitations of existing technologies in achieving simultaneous acquisition and fusion of multi-source information, and in the refined observation and quantitative characterization of fracture surface self-closing behavior, the following solution is proposed, comprising sample preparation, fracture surface monitoring, sample sealing, external monitoring, and experimental testing steps. A matching rock specimen with an intermediate fracture surface is fabricated. Fixed fiber optic sensors are deployed on the fracture surface. After multiple sealing operations, fiber optics or traditional deformation sensors are selectively deployed on the outer surface of the specimen. A triaxial testing system is then used to conduct fracture self-closing performance testing under temperature-stress-seepage-chemical multi-field coupling conditions to obtain key characterization parameters. This invention achieves refined observation and quantitative characterization of fracture surface self-closing behavior under temperature-stress-seepage-chemical multi-field coupling conditions.

The invention relates to the technical field of noise reduction, in particular to a micro-grid device for inhibiting aerodynamic noise induced by an acoustic liner material framework and application of the micro-grid device. The micro-grid device provided by the invention comprises a cylinder, an acoustic liner material layer fixed on the surface of the cylinder and a plurality of micro-grid structures fixed in the acoustic liner material layer, the plurality of micro-grid structures are arranged at intervals along the circumferential direction and the axial direction of the cylinder; the mesh size of the micro-grid structure ranges from 0.005 mm to 0.1 mm; the micro-grid structure is made of stainless steel, titanium alloy or high polymer material; the high polymer material is one or more of polytetrafluoroethylene, polyimide and polyethylene. According to the invention, through combination of the acoustic liner material and the micro-grid structure, full-band suppression of low and medium frequency and high frequency noise can be realized.

The present invention discloses a blood gas biochemistry test card, a blood gas analyzer and a control method for the blood gas analyzer. The blood gas biochemistry test card comprises: a test card body, the test card body is provided with a first fluid pipeline, a test cavity communicated with the liquid outlet end of the first fluid pipeline, and a second fluid pipeline communicated with the liquid outlet end of the test cavity, the first fluid pipeline is provided with a first liquid inlet, and the second fluid pipeline is provided with a connecting portion for connecting an aspiration device; a calibration liquid bag, the calibration liquid bag is fixedly arranged on the test card body, and the calibration liquid bag is provided with a matching portion docking with the first liquid inlet; and a valve core, the valve core is arranged in the first fluid pipeline or in the calibration liquid bag, and the valve core is provided with a spike portion for piercing the matching portion. The blood gas biochemistry test card uses the valve core to accurately pierce the calibration liquid bag, so that the calibration liquid can be injected into the first fluid pipeline; the blood gas biochemistry analyzer can conveniently and accurately complete the calibration analysis.