54results about How to "Free from erosion" patented technology

The invention relates to a street lamp which is provided with a LED heat radiator, an outdoor illuminating device applied to streets or public squares. The street lamp comprises a lamp box; an illuminating window is arranged on the lower body of the lamp box; a transparent lamp house is mounted on the illuminating window; the lower box body is connected with an upper box body; an arched framework with a vaulted cross-section is arranged at the lower box body; a plurality of luminescent modules are mounted on the lower surface of the arched framework, and radiating members are mounted on the upper surface of the arched framework. The luminescent LED of the luminescent module is connected with a rapid radiating metal-base printed circuit board in a heat-conducting manner. The invention adopts a rapid radiating metal-base printed circuit board; the structure and material ensure that heat produced during the operation of the LED can be transmitted to the heat radiator rapidly and efficiently. The invention also includes a series of heat radiating members made of solid conducting mediums with sound heat-conducting performance which can transmit the heat directly into outdoor air; and the solid medium can protect the electric apparatus inside the lamp box from being eroded by winds, rains and dusts.

The invention provides a packaging structure, a packaging method and photoelectric equipment. The packaging structure comprises a substrate, a light emitting device, a liquid blocking layer, a net-shaped gap layer, a first water absorbing layer and at least one sealing barrier layer, wherein the light emitting device is arranged on one side surface of the substrate; the liquid blocking layer is arranged on the exposed surface of the light emitting device; the net-shaped gap layer is arranged on the surface, far from the substrate, of the liquid blocking layer; the material of the net-shaped gap layer comprises aerogel; the first water absorbing layer is arranged on the surface, far from the liquid blocking layer, of the net-shaped gap layer, and connected with the substrate in a sealing manner; the at least one sealing barrier layer is connected with the substrate in a sealing manner to form a sealed space; and the first water absorbing layer, the net-shaped gap layer, the liquid blocking layer and the light emitting device are arranged in the sealed space. By virtue of the packaging structure, the problem of poor sealing effect on vapor of the packaging structure of the light emitting device in the prior art is solved, the light emitting device is effectively protected from external vapor erosion, and the sealing effect is improved.

The invention discloses selenium peptide nanometer self-emulsifying powder, and a preparation method and application thereof. In a typical implementation scheme, the preparation method comprises the following steps that endogenic soy isolate protein is used as a hydrophilic and lipophilic nonionic surfactant; medium chain triglyceride with small irritation is used as an oil phase of a self-emulsifying system; selenium and polysaccharide is combined with polypeptide through maillard reaction to be used as biological active ingredients; freeze drying is performed after the milk formation; the selenium peptide nanometer self-emulsifying powder is prepared. The selenium peptide nanometer self-emulsifying powder provided by the invention has the excellent biocompatibility and bioavailability; the secondary solubility is good; the storage and the eating are convenient; the preparation process is simple; the quality is stable; the selenium peptide nanometer self-emulsifying powder is suitable for mass production.

The invention provides a preparation method for low-viscosity environment-friendly electronic tri-proof paint. The low-viscosity perfluocarbon polymer electronic tri-proof paint is synthesized by using perfluoroalkyl acrylate as a base material, and using modified graphene as an additive. The perfluoroalkyl acrylate is synthesized through free radical polymerization of four mixtures of methyl acrylate, butyl acrylate, tert-Butyl acrylate and hydroxyethyl acrylate and a high-performance fluorine-containing monomer. The modified graphene is graphene prepared by lipophilic modification, and can be blended with the perfluoroalkyl acrylate. Firstly, the low-viscosity environment-friendly electronic tri-proof paint is lower in viscosity, and good in heat radiation, and is capable of coating andforming about 5-10 um of a thin film on a circuit board; secondly, a solvent and a polymer in a product are safe and low-toxic substances without damaging an ozone layer; and thirdly, because of the combined action of the graphene and the fluorine-containing monomer, the paint film can bear the impact of about 80 KG of an external force and does not fall off.

An air curtain protection method for the bath wall of a melting furnace is characterized in that an isolation air curtain is made between the brick inner surface of the bath wall of the melting furnace and melt, and bath wall bricks of the melting furnace are isolated from melt so as to reduce or avoid the corrosion of melt to the bath wall bricks of the melting furnace due to contact. Gas used by the isolation air curtain can be compressed air, combustion smoke and the like, and the gas of the isolation air curtain is supplied by one row or multiple rows of ventilation seams or ventilation holes in the pipe walls of air supply pipes. The air supply pipes can be paved at the bottom of the brick inner side of the bath wall of the melting furnace or in certain-height grooves in the brick inner side of the bath wall of the melting furnace. The air supply pipes paved can run through the width or the length of the melting bath of the melting furnace in the length direction and extend out of the bath wall on the two sides. The air supply pipes can also be vertically closely arranged and cover the brick inner surface of the bath wall of the melting furnace. The upper ends of the air supply pipes extend out of the bath wall bricks of the melting furnace, so that the connection of an air source and the change and maintenance of the air supply pipes are convenient.

The invention relates to a 2D carbon / silicon-silicon carbide composite material pin preparation method and a preparation method and structure of a 2D carbon / silicon-silicon carbide composite material pin preform. The pin preparation method comprises 1, preparing a preform through horizontal paving (0 degree)-inclined paving (45 degrees) alternative laying of a 2D carbon fabric, graphite mold-based setting and carbon fiber vertical seaming on the multilayer carbon fabric, 2, depositing a pyrolytic carbon protective layer in the preform, 3, carrying out chemical vapor infiltration (CVI) to obtain a silicon carbide base, 4, cutting a flat blank to obtain a strip-shaped pin blank with the square section, 5, carrying out CVI silicon carbide protection of exposed fibers, 6, carrying out reactive melt infiltration (RMI) treatment, 7, milling the pin blank to obtain a pin with a standard size and 8, carrying out examination to obtain a carbon / silicon-silicon carbide composite material pin finished product. Through combination of CVI and RMI, the preparation method has the advantages of low production cost, short production period, low product porosity, high density and batch production. The ceramic-based composite material prepared by the CVI and RMI has shear strength of 80-100MPa at the room temperature.

The invention discloses an oxygen-control type pipeline-corrosion-resistant liquid metal for 40-80 DEG c of an electronic chip and a process thereof. The alloy comprises the following components in percentage, by weight, the alloy composition is 0.2-0.5wt% of Hf, 0.4-1.0wt% of Co, 4.0-8.0wt% of Bi, 2.0-5.0wt% of Zn, 5.0-10.0wt.% of In,1.0-2.0wt.% of Cd, 5.0-8.0wt.% of Pb, and the balance of gallium; wherein the oxide composition for controlling the oxygen activity is pbo: 30.0-40.0wt% of PbO, 2.0-4.0wt% of CuO,10.0-20.0wt% of AgO, 4.0-6.0wt% of CdO, 5.0-8.0wt% of NiO, and the balance of Fe2O3.Through controlling the oxygen activity by adopting an oxygen control module, the stable compact oxidation film can be effectively generated on the surface of the stainless steel pipeline to inhibitcorrosion of the liquid metal to the pipeline material, the method has the characteristics that the process is simple, the implementation cost is low, the heat dissipation is efficient, the service life of the heat dissipation component is prolonged, and the service life of the heat dissipation component is obvious.

The invention discloses a cascade polymer solar cell and a preparing method of the cascade polymer solar cell. The solar cell comprises a substrate, two (or more than two) cell units, interval layers connecting all layers and a packaging layer packaging the polymer solar cell. The two (or more than two) cell units are electrically separated by the transparent interval layers formed by usage of atomic layer deposition (ALT) technology, absorption of solar spectrums of each cell is not influenced, and integral sunlight absorptivity of the cascade cell can also be optimized through adjustment of the thickness of the interval layer. In addition, the design basically separates electrical design from optical design, and design cost is effectively reduced. Meanwhile, ALD film has the advantages of being good in compactness and good in adhesion and the like, can effectively protects the cell units below the film layer from being eroded by water and oxygen in outside air, and plays a role in packaging and prolongs service life of the cell.

The invention discloses a multifunctional compact traction device for a center pin. The traction device comprises a center pin seat, a traction base connected with the center pin seat, a traction bar assembly installed on the traction base and transverse absorbers, wherein the lower parts of the center pin seat are provided with two absorber seats as rib plates, the absorber seats are provided with transverse absorbers; the traction seat is a semi-closed structure used for enveloping the traction bar, and the left side plate and right side plate of the traction seat are provided with transverse backstops. According to the multifunctional compact traction device provided by the invention, the structure can be simplified and the functions of the traction devices can be enriched; furthermore, the problems that the traction seat is large in welding quantity, the center pin seat is single in function and the interference is likely to be caused can be solved to a large extent.

The invention relates to the technical field of oil and gas field horizontal well multi-step fracturing, in particular to a fracturing slide sleeve capable of being opened and closed for many times. The fracturing slide sleeve comprises a fracturing ball, an upper joint, a set screw, a fracturing sleeve, an O-shaped ring, a sand-preventing ring, a striking-off ring, a vulcanization sealing ring, an upper internal slide sleeve, a ball seat, a lower internal slide sleeve, a key, a baffle ring, a locating ring, a shearing ring, a shearing pin, a protecting sleeve and a lower joint. The fracturing slide sleeve is mainly used in the oil and gas field horizontal well section and multistage fracturing, pipe columns of single trip are converted into production pipe columns after ball throwing and fracturing in a multilayer and step-by-step mode. A continuous oil pipe is used for drilling and removing a cast iron ball seat and a composite fracturing ball seat in a one-time mode, and the larger drift diameter is reserved. The internally-arranged groove structure and a matched switch tool can achieve the objective that a fracturing channel of any layer can be opened or closed for many times, and the vulcanized rubber seal structure ensures that the fracturing slide sleeve resists the high temperature and the high pressure.

The present invention relates to field adjustable spring brackets. The top sliding pair is installed on the top of the bracket on the spring bracket, and the top sliding pair provides support for the pipe bracket and the pipe; the bottom surface of the upper bracket of the spring bracket is provided with a vertically downward lower sleeve, and the lower bracket of the spring bracket It is arranged under the upper bracket of the spring bracket, and the top surface of the lower bracket of the spring bracket is provided with a vertically upward upper sleeve, the lower sleeve is set on the upper sleeve, and the working spring is arranged in the upper sleeve. The upper end of the spring is pressed against the bottom surface of the upper bracket of the spring bracket, and the upper end of the working spring is pressed on the upper surface of the upper bracket of the spring bracket; the upper bracket of the spring bracket and the lower bracket of the spring bracket are adjusted by a load preload value adjustment mechanism Connected, the upper bracket of the spring bracket and the lower bracket of the spring bracket can move up and down relative to each other. The invention has simple structure, ingenious design, more reliable performance than similar spring brackets, more convenient construction and installation, and the actual working performance is more consistent with the design requirements, thereby ensuring the long-term safe operation of the pipeline.

The invention relates to a multi-layer composite protection layer applied to PCB and a method. The multi-layer composite protection layer comprises a nano silicon dioxide coating, Parylene C coating,and epoxy resin coating which are arranged inside to outside, and the thickness of the Parylene C coating is 30-40 [mu]m. The application method comprises the steps of: 1) cleaning and dehumidifying the surface of a PCB; 2) socking the cleaned PCB into a nanosilicon dioxide liquid to obtain a PCB with a surface coated with nanosilicon dioxide; 3) coating a Parylene C material at the surface of thePCB with the surface coated with nanosilicon dioxide by employing a vacuum chemical vapor deposition method; and 4) obtaining the epoxy resin material at the surface of the PCB obtained in the step 3). The PCB is good in waterproof performance, can normally work in a soaking environment and has a good mechanical performance.