15results about How to "High impact" patented technology

The invention discloses a preparation method of a composite alveolar bone repair stent. The method comprises the following steps: mixing nano-scale hydroxyapatite powder and medical-grade PLA plastic powder according to a mass ratio of 10-20%: 1, melting and drawing wires to obtain a PLA / HAP wire for 3D printing, setting 3D printing parameters, introducing a bone repair scaffold three-dimensional model, starting printing to obtain a PLA / HAP composite material bone repair scaffold, soaking the scaffold in a 1-3mg / mL BMP bone morphological protein solution, and carrying out 3D printing to obtain the bone repair scaffold with the PLA / HAP composite material bone morphological protein / PLA / HAP composite material bone morphological protein / PLA / HAP composite material bone morphological protein / PLA / HAP composite material bone morphological protein composite material. The BMP-PLA / HAP composite material bone repair scaffold is obtained. The hydroxyapatite / PLA composite material prepared by adopting a 3D printing technology, taking the nano-scale hydroxyapatite powder and the medical-grade PLA plastic powder as raw materials and loading the BMP bone growth factor with high biological inductivity has high strength, high hardness and impact resistance, and can be used for preparing the medical-grade hydroxyapatite / PLA composite material. The invention aims to provide a safer and more effective bone graft material for clinically repairing alveolar bone defects.

This utility model provides a car roof handle and vehicle based on a four-bar linkage, belonging to the field of automotive parts technology. It includes: a base with a proximal hinge and a distal hinge, located at different positions along the depth of the base; one end of a first rocker arm hinged to the proximal hinge of the base, and the other end of the first rocker arm hinged to a connecting arm; one end of a second rocker arm hinged to the distal hinge of the base, and the other end of the second rocker arm hinged to a connecting arm; the connecting arm is hinged to the handle body. The first rocker arm, the second rocker arm, the connecting arm, and the base constitute a four-bar linkage. The advantages of this utility model are: the four-bar linkage allows for extension and retraction between the handle body and the base, enabling the handle body to be retracted and close to the base when not in use, and extended when in use, saving interior space and adapting well to bumpy driving environments.

The invention belongs to the field of polyamide, and particularly relates to high-viscosity polyamide 66 resin as well as a preparation method and application thereof. The relative viscosity of the high-viscosity polyamide 66 resin is 3.0-6.5, and the amino-terminated group content is less than or equal to 50mmol / kg. The method for preparing the high-viscosity polyamide 66 resin is carried out under the positive pressure condition, the nitrogen atmosphere is adopted, and the temperature is always below the melting point of polyamide 66, so that materials are uniformly heated, and yellowing of the materials caused by air entering can be avoided. Downstream products prepared from the high-viscosity polyamide 66 resin have excellent properties such as high impact resistance, high shear resistance, high toughness and low-temperature toughness meeting use requirements.

The utility model relates to the field of seismic isolation of constructional engineering, and discloses a seismic isolation device for civil and industrial buildings. A main buffer column is fixedly connected to the upper surface of the lower foundation plate, an upper connecting plate is fixedly connected to the upper surface of the main buffer column, a connecting ring is welded to the position, corresponding to the main buffer column, of the lower surface of the upper connecting plate, a side pipeline inlet is welded to the upper surface of the lower foundation plate, and a hard pipe is movably connected to the inner surface of the side pipeline inlet. A flexible connecting pipe is fixedly connected to the outer surface between the hard pipes, the vacant position between the lower foundation plate and the upper connecting plate is positioned through a side pipeline inlet, the connecting ring is adjusted according to needs, when the upper connecting plate continues to be connected with the bearing column, the supporting column connecting ring is used for connection, the bearing column is convenient to fix, and the flexible connecting pipe is pulled out through the hard pipes. When the upper connecting plate is connected with the supporting plate, the space of the connecting ring can be reserved, and the pipeline can be led out through the connecting ring by being inserted into the hard pipe.

The invention discloses an antistatic antibacterial polypropylene composite membrane material and a preparation method thereof, and belongs to the technical field of membrane materials. The preparation method comprises the following steps: a, preparing a polyketone spinning solution, and carrying out electrostatic spinning to obtain a polyketone nanofiber membrane; b, modifying the polyketone nanofiber membrane by adopting polydopamine and silver nitrate to obtain a modified polyketone nanofiber membrane loaded with silver nanoparticles; c, putting the polypropylene granules into a mold frame, and carrying out hot pressing through a press vulcanizer to form a polypropylene film; and d, stacking the modified polyketone nanofiber membrane loaded with the silver nanoparticles on a polypropylene membrane, putting the polypropylene membrane and the modified polyketone nanofiber membrane into a mold frame, and carrying out hot press molding through a press vulcanizer to obtain the anti-static antibacterial polypropylene composite membrane material. The antibacterial efficiency, barrier property and impact resistance of the polypropylene composite film material are greatly improved, the polypropylene composite film material also has an antistatic function, meanwhile, the addition amount of silver nanoparticles in the composite film is reduced, and the cost is effectively reduced.

This invention discloses a permanent cathode plate transfer device and its transfer method, belonging to the technical field of workpiece transfer equipment. The device includes two symmetrically arranged transfer sections. The frame of each transfer section is welded from a rail groove plate, side plates, and a base plate. The base plate is equipped with a drive cylinder and a synchronous pulling plate. An inclined unloading station is set at the end of the rail groove plate. Fully automatic transfer is achieved with the aid of a photoelectric switch and a PLC. The rails are divided into wide-head rails and narrow-tail rails, which can be independently disassembled and replaced. The wide-head rails expand the support surface to prevent the cathode plate from tilting and falling off. The synchronous action of the double pulling plates completes the automatic correction of the cathode plate, ensuring accurate placement of the conductive rod. The easily damaged wide-head rails can be replaced separately, reducing maintenance costs. The transfer method relies on the above mechanism to sequentially complete the entire process of cathode plate loading, sliding conveying, automatic correction, and inclined unloading.

The invention relates to vegetable oil-based polyhydric alcohol, waterborne polyurethane, a preparation method and application of the vegetable oil-based polyhydric alcohol and the waterborne polyurethane in a mortar floor coating. The preparation method comprises the following steps: carrying out epoxy ring-opening reaction on epoxidized vegetable oil and natural chlorogenic acid to obtain vegetable oil-based polyol; in addition, vegetable oil-based polyol and isocyanate are stirred according to a certain ratio at room temperature for reaction and curing, and vegetable oil-based waterborne polyurethane is obtained; in addition, the invention also relates to an application of the plant oil-based polyol in the waterborne polyurethane antistatic mortar floor coating. The vegetable oil-based waterborne polyurethane prepared from the vegetable oil-based polyol and the isocyanate has a good antibacterial effect; furthermore, the waterborne polyurethane anti-static mortar floor coating prepared by the invention has the performance superior to that of common waterborne polyurethane mortar, and has the capabilities of resisting bacteria, conducting electricity and eliminating accumulated static charges (the surface resistance is maintained at 1 * 10 < 4 >-1 * 10 < 9 > for a long time without attenuation).

The application discloses a preparation method of a monopropellant monolithic catalyst, selects a honeycomb ceramic carrier which has good heat conductivity and heat shock resistance and can keep stable structure in a high-temperature environment, coats a modified alumina coating on the surface of the ceramic carrier, and then loads noble metal as a catalytic active component through an impregnation method, so that the connectivity between the noble metal active component and the carrier is enhanced, the noble metal loading capacity is increased, the coating firmness is improved, the catalyst breakage rate is significantly reduced, and the catalyst thermal stability is improved. The monolithic catalyst prepared by the application has high catalytic activity, good coating firmness, and the modified alumina coating can also increase the strength of the carrier, can effectively inhibit sintering and phase change of the carrier in a high-temperature environment, improve the thermal stability, and is not easy to break in a high-temperature environment.

The application relates to the field of exterior parts for new energy vehicles, and discloses surface-modified basic magnesium sulfate whiskers and a polypropylene alloy material, a preparation method of the surface-modified basic magnesium sulfate whiskers and the polypropylene alloy material, and a bumper. The surface-modified basic magnesium sulfate whiskers are obtained by surface modification of basic magnesium sulfate whiskers with a modifier, and the modifier is one or more of methacryloxypropyltrimethoxysilane, lauric acid and dodecyl monophosphate. The polypropylene alloy material is applied to the bumper, and can simultaneously have excellent high rigidity, high impact resistance and high light transmittance.

The present application relates to a kind of Φ offshore vertical axis fan and its working method, belong to the technical field of offshore vertical axis fan.The fan of the present application includes support base, fan tower, fan rotating shaft, blade folding mechanism, fan laying mechanism and laying locking mechanism;Blade folding mechanism uses segmented blade to cooperate with cross brace, slider and slide rail structure, can realize blade folding;Fan laying mechanism drives tower overall laying through flange, gear transmission assembly and hinge device;Laying locking mechanism realizes structure locking after laying;The working method of the present application includes normal power generation and extreme weather condition, can complete blade folding, fan laying and fixing step by step.The present application can greatly reduce the probability of structural damage of fan blade due to extreme wind load under extreme weather, improve the extreme weather resistance of offshore vertical axis fan, prolong the service life of equipment, reduce operation and maintenance cost.

The utility model discloses an improved stirring frame of an electric ice cream machine. A shaft sleeve hole is formed in the center of the bottom plate, the rotating shaft is sleeved with the shaft sleeve hole, the rotating shaft is fixed to a bolt at the upper end of the rotating shaft through a nut, the two ends of the bottom plate are each fixedly provided with a vertical plate, the upper middle portion and the lower middle portion of the first vertical plate are each provided with a notch, the upper middle portion and the lower middle portion of the second vertical plate are each provided with a notch, and each notch is provided with two hole channels. A clamping groove is formed in the outer end of the sleeve rod, a sleeve sealing ring is clamped on the clamping groove, the sleeve rod penetrates through the hole channel to clamp the scraper plate at the notch, and the scraper plate is a nylon PA6 plastic plate. The scraper is high in strength and good in toughness and wear resistance. The scraping plate can be tightly attached to the barrel wall for scraping, scraping is thorough and clean, stirring is uniform, and machine blocking is avoided.

The application discloses a kind of eight corner and cylinder combined connection structure of impeller and pump shaft, including pump shaft and impeller installed on the pump shaft, the shaft section of the pump shaft and impeller cooperation is sequentially provided with first cylindrical centering section, octagonal torque transmission section and second cylindrical centering section from end face to inside;The wheel hub bore of the impeller is correspondingly provided with the first cylindrical hole section matched with the first cylindrical centering section, the octagonal hole matched with the octagonal torque transmission section and the second cylindrical hole section matched with the second cylindrical centering section, under the working condition of frequent start-stop, forward-reverse switching or load fluctuation, the impact wear and roll key phenomenon commonly seen in flat key connection will not be generated, fundamentally avoid the problem of connection loosening failure.The reliability of connection structure is significantly improved, and the requirements of continuous long-period operation can be met.

This utility model relates to the field of transformer technology, and more particularly to a transformer protection device, comprising a transformer body, crossbeams, longitudinal beams, columns, connecting beams, and triangular beams. The transformer body is placed on the middle of two crossbeams, with both ends of the crossbeams connected to the middle of the longitudinal beams, and both ends of the longitudinal beams connected to the middle of the columns. The tops of two adjacent columns are connected by connecting beams. The triangular beams are connected to the upper and lower ends of the same column, and the middle of one triangular beam is connected to the middle of another triangular beam to form a stable triangular structure. This utility model, by connecting the tops of two columns with connecting beams to block heavy objects from falling on the transformer body, and by setting up triangular beams to form a stable triangular structure between adjacent columns, enables the transformer protection device to withstand greater impacts and pressure, maximizing the safe operation of the transformer.

This application relates to the field of tempered glass processing cooling technology and discloses a tempered glass processing cooling device. The device includes a cooling tank with four vertical rods fixedly connected to the inner wall of its bottom side. A common fluorinated liquid is slidably fitted onto the outer sides of the four vertical rods. The cooling tank is filled with fluorinated liquid, and support legs are fixedly connected to its bottom side. In this application, by setting up the fluorinated liquid, the processed glass is placed inside the fluorinated liquid, where it is immersed in the fluorinated liquid. The fluorinated liquid effectively exchanges heat with the glass, achieving cooling. Compared to natural cooling, this method significantly improves cooling efficiency, saves time, and facilitates widespread use. Furthermore, when using fluorinated liquid for cooling, it forms a compressive stress layer on the surface of ordinary glass, increasing its hardness and strength, enabling it to withstand greater impacts and loads.

The invention discloses a high-barrier transparent polypropylene composite membrane material and a preparation method thereof, and belongs to the technical field of membrane materials. The preparation method comprises the following steps: a, preparing a polyketone nanofiber membrane through electrostatic spinning; b, preparing a modified polyketone nanofiber membrane loaded with N, N '-dicyclohexyl terephthalamide; c, putting the polypropylene granules into a mold frame, and hot-pressing the polypropylene granules into two polypropylene films through a press vulcanizer; and d, putting the modified polyketone nanofiber membrane between two polypropylene membranes, putting the two polypropylene membranes and the modified polyketone nanofiber membrane into a mold frame, and carrying out two-section hot press molding through a press vulcanizer to obtain the high-barrier transparent polypropylene composite membrane material. The used raw materials are cheap and easy to obtain, the forming process is simple, the production cost is low, the barrier property of the polypropylene composite film is remarkably improved, meanwhile, the polypropylene composite film has good impact resistance and transparency, and the polypropylene composite film is suitable for industrial popularization.