84results about How to "Strong pollution resistance" patented technology

The invention provides a liquid crystal microcapsule and a preparation method thereof. The liquid crystal microcapsule preparation method comprises the following steps: 1, adding an emulsifier to water in order to obtain a dispersion used as a water phase; 2, uniformly mixing liquid crystal with a monoolefin monomer, a polyene cross-linking agent and an initiator to obtain a mixture used as an oil phase; 3, mixing the water phase with the oil phase, and emulsifying to obtain an oil-in-water emulsion; 4, polymerizing the emulsion to form the liquid crystal microcapsule with a core-shell structure; and 5, centrifuging the liquid crystal microcapsule, and carrying out spray drying to obtain liquid crystal microcapsule dry powder. The liquid crystal microcapsule prepared through the method has the advantages of uniform dimension, high cladding rate, short production period, simple process, no pollution to the liquid crystal, improved fusion with a microcapsule cladding material, long liquid crystal storage time, and improvement of the water resistance and the pollution resistance of the liquid crystal. The invention also provides the liquid crystal microcapsule with the core-shell structure prepared through the preparation method.

The invention relates to a method for preparing a polyether modified HMDI waterborne polyurethane curing agent. The curing agent is mainly prepared from hydrogenated diphenyl-methane-diisocyanate H6MDI or H12MDI, polyether polyol, inert solvent and polymerization inhibitor. The polyether modified HMDI waterborne polyurethane curing agent does not contain aromatic hydrocarbon, glycol ether or alkylphenol, has the characteristics of environmental friendliness, good scratch resistance, good transparence, excellent chemical resistance, strong pollution resistance, good yellowing resistance and the like; and polyurethane paint prepared from a waterborne hydroxyl component has the characteristics of high hardness, high transparence, good film scratch resistance, good leveling property, high fullness, good solubility and the like, can be widely applied to waterborne wood lacquer, waterborne industrial paint, waterborne plastic paint and other various dual-component waterborne polyester paint, waterborne polyurethane paint, waterborne epoxy paint, waterborne alkyd paint, waterborne polyurethane glue and other specific curing agents.

The invention provides an environment-friendly solid wood ecological board with formaldehyde removal and bacterium removal functions and a production technique thereof. The environment-friendly solid wood ecological board with the formaldehyde removal and bacterium removal functions comprises a board core, a middle board body, poplar veneer, glue and a formaldehyde removal and bacterium removal decorative film adhesive. The upper surface and the lower surface of the board core are coated with the glue, the board core is covered with the middle board body, and the board core and the middle board body are integrally pressed to form a board blank; the upper surface and the lower surface of the board blank are coated with the glue, the board blank is covered with the poplar veneer, and the board blank and the poplar veneer are integrally formed through cold and hot pressing, so that a base board is manufactured; and the formaldehyde removal and bacterium removal decorative film adhesive and the base board are integrally formed through hot pressing, so that the finished environment-friendly solid wood ecological board is manufactured. According to the environment-friendly solid wood ecological board, the low-formaldehyde E0-level environment-friendly base board is adopted, the formaldehyde content of the manufactured solid wood ecological board can be below 0.3 mg / l, and the solid wood ecological board is economical and environmentally friendly; impregnated paper containing a glue solution having elements with bacterium removal and formaldehyde decomposition functions is adopted so that formaldehyde in air can be effectively removed, and the effect is good and lasting; and meanwhile, the powerful bacterium removal function is achieved, and the environment-friendly solid wood ecological board is beneficial for human health and indoor air purification.

The invention discloses a preparation method of an aliphatic polyamide loose reverse osmosis membrane. The preparation method comprises the following steps: coating a porous supporting membrane with achain type aliphatic amine solution by adopting a coating or immersing way, and then carrying out interfacial polymerization on the porous supporting membrane coated with the chain type aliphatic amine solution and a cycloaliphatic acyl chloride solution, thus forming the aliphatic polyamide loose reverse osmosis membrane. The aliphatic polyamide loose reverse osmosis membrane is prepared by carrying out the interfacial polymerization on cycloaliphatic acyl chloride and chain type aliphatic amine, has an excellent removal rate on divalent ions such as Ca<2+>, Mg<2+> and SO4<2->, has very goodanti-fouling performance and high water flux, can be used for removing COD such as dye molecules and phenolic molecules in wastewater, can also be applied to a separating and concentrating process ofmaterials in industries of pharmacy and food or the fields of water softening, seawater desalination or brackish water pretreatment, refuse leachate treatment and the like, and has a huge applicationprospect.

A water-proof coating system for reflecting solar radiation, which comprises optionally a base layer on a substrate and a reinforcing layer on the base layer; a white reflective and water-proof layer on the substrate or on the reinforcing layer; and a decorative and reflective layer on the white reflective and water-proof layer; wherein the decorative and reflective layer comprises colored infrared-reflective pigments. Water-borne coatings for forming a decorative and reflective layer in the coating system, which comprise acrylic polymers, colored infrared-reflective pigments and UV cross-linking agents. Said coating system can reflect solar radiation with high efficiency and effectively prevent water from penetrating through; has strong stain resistance and good weather resistance; has strong adhesion to various substrates; and also offers diversified colors for choosing. Said water-borne coatings can be applied easily, and are environment friendly.

The invention discloses a preparation method of a glycine betaine colloid nano particle modified chitosan nanofiltration membrane which comprises a porous polysulfone support layer and a functional layer formed by glycine betaine colloid nano particle modified chitosan. The preparation method comprises the steps of: firstly, carrying out solution polymerization reaction to obtain a glycine betaine colloid nano particle; and then preparing the nano particle, chitosan and a cross-linking agent into a water solution with a certain concentration, dipping one layer of water solution on the surface of the porous polysulfone support layer, and then curing and crosslinking to obtain the nanofiltration membrane. According to the nanofiltration membrane, under the operation pressure of 0.6MPa, the water flux is 25-35L.m<-2>.h<-1>, the retention rate of divalent cations is generally higher than 97 percent, and the retention rate of monovalent salts is lower than 60 percent; meanwhile, the nanofiltration membrane shows good pollution resistance. Therefore, the prepared glycine betaine colloid nano particle modified chitosan nanofiltration membrane has high permeation selectivity and pollution resistance; the preparation method is simple and easy to operate and low in cost, and has a good industrialized application prospect.

The invention relates to a charged membrane device for water processing. The device comprises a power supply, a membrane group device and a membrane assembly, wherein the membrane group device is groove-shaped, the upper portion and the lower portion of the membrane group device are open and the periphery of the membrane group device is sealed, the membrane assembly is arranged inside the membrane group device, and the outer surface of a hollow fiber membrane wire is coated with a layer of outer tubular supporting layer having a mesh multi-hole structure to form a hollow fiber membrane. When the device is applied in an immersion type membrane separation technology, under the action of current of the power supply, the hollow fiber membrane wire is shielded by the negative electrode of the outer tubular supporting layer, and pollutants with negative electricity can hardly pollute the hollow fiber membrane under the action of electrostatic repulsive force and the flocculation of an electrode dissolution flocculating agent, so that membrane pollution is controlled. The charged membrane device having an anti-pollution function and capable of generating the flocculating agent can control membrane pollution effectively and has the advantages of being high in stain resistance, high in strength of the membrane wire, free of addition of the flocculating agent, capable of purifying waterquality, practical and the like.

The invention discloses a preparation method of modified composite ultrafine talcum powder, which comprises the following steps: (1) breaking raw material, and grinding the broken material to fine powder; (2) adding water and grinding-assistant medicine into the ground material to be configured into pulp with the concentration of 50 to 70 percent and to be uniformly mixed; (3) configuring composite modifier, silane coupling agent and sodium stearate to surface modification solution to be poured into the pulped material so as to modify the material; (4) carrying out the wet-method ultra-fine grinding on the modified material, and requiring the particles with the granularity being less than 2 micrometers for the mineral pulp ultra-fine grinding to be more than 95 percent; (5) forcibly drying and collecting the material after being ultra-fine ground. By utilizing the wet-method ultra-fine grinding and mightiness drying process, the prepared modified composite ultra-fine talcum powder has smaller granularity than that of ordinary talcum powder and wider distribution, resists the insolation and high temperature, has good water resistance, resists pollution, and has strong anti-aging performance.

The invention discloses a membrane refining process for medicinal sodium chloride. The membrane refining process comprises the following steps: leading brine or crude salt water saturated by melting salt into a front reaction tank, adding barium chloride into the front reaction tank, filtering through a large-mesh filter after reaction, and removing sulfate radical through a first membrane filter; leading the sulfate radical-removed clear liquid into a rear reaction tank, adding sodium hydroxide and sodium carbonate into the rear reaction tank, and leading the solution into a second membrane filter after complete reaction so as to remove calcium and magnesium; leading the calcium and magnesium-removed clear liquid to an acid regulating tank, and adding hydrochloric acid to adjust the pH, so as to obtain refined salt water; producing the medicinal sodium chloride by an evaporation method, wherein the obtained medicinal sodium chloride has the advantages that the concentration of SS is less than or equal to 1mg / L, the total concentration of Ca<2+> and Mg<2+> is less than or equal to 1 mg / L, and the concentration of SO4<2-> is less than or equal to 20 mg / L. According to the membrane refining process, a two-stage membrane filtration method is adopted, no flocculant is added, the process is continuous, the operation is simple, the treatment capacity is large, the pollution resistance is high, and the quality of the medicinal salt is obviously improved after evaporation and crystallization.

The invention discloses a contamination-resistant large-capacity macroporous weak-acid resin synthesis method. The synthesis method comprises the steps that an acrylonitrile monomer, a divinyl benzene crosslinking agent, a pore-foaming agent and an initiator are adopted according to a certain proportion to prepare an oil phase, and water, a dispersing agent and NaCI are adopted to prepare a water phase in a polymerization kettle, then the oil phase is added to the water phase, heat release reaction occurs in the polymerization kettle, and the temperature of released heat is as high as 95 DEG C; cooling is performed with prepared saturated salt water, the temperature of the polymerization kettle is kept at 95 DEG C, then heating is performed to reach 100 DEG C, and heat-preservation distillation is performed; after temperature reduction, discharging, washing, drying, screening and cooling, contamination-resistant large-capacity acrylic acid type cation exchange resin white balls are obtained, the white balls are subjected to dissolving and swelling and then are mixed with 60 wt% sulphuric acid to perform hydrolysis reaction, heat preservation is performed for 10 hours, then discharging is performed, the discharge is washed with water to be neutral, alkali regulation is performed to reach pH = 12, and standing is performed for 2 hours; then, the discharge is washed with water to be neutral, acid regulation is performed to reach pH = 2, and standing is performed for 2 hours; the discharge is washed with pure water to be neutral and then is converted into sodium resin by using NaOH with the concentration of 30%, namely the contamination-resistant large-capacity macroporous weak-acid resin is obtained.

Disclosed is a preparation method of silicon separation membrane, having specific selectivity to natural products, which belongs to a membrane preparation technique. The method comprises: dissolving a template agent into an alcohol solution to produce template agent solution, then, adding functional monomers into said produced solution, adding in stabilizer, condensing and refluxing to remove the solvent and produce a silane precursor, dissolving tetraethoxysilane into the alcohol solution, adding in the silane precursor followed by condensing and refluxing to prepare a sol, next, aging at room temperature and dipping treated Al2O3 plate into the sol, finally, sintering in a muffle, eluting the template agent and drying to produce silicon separation membrane. The present invention is characterized in simple preparation, the produced separation membrane realizing selectively separation of a certain substance in molecular scale, water-phase molecule recognition, particularly fit for natural products separation and extensive general uses.

The invention provides an internal pressure type composite hollow fiber nanofiltration membrane filament, which comprises an inner layer of a hollow fiber membrane taking polyether sulfone as the mainbody. An amino functional group reacts with a catalyst to form an aromatic polyamide compact selection layer. The membrane filament has the advantages of stable performance, strong pollution resistance, chlorine resistance, and high flux and bivalent salt interception. And a hollow fiber membrane module composed by the hollow fiber nanofiltration membrane filament can realize a large filling area, which can be 2-3 times that of a roll type membrane module, so that the treatment capacity can be greatly improved.

The invention discloses a synthetic method of pollution-resistant deeply-softened chelating resin. The synthetic method comprises the following steps: preparing an oil phase by adopting a styrene monomer, a divinyl benzene crosslinking agent, a pore-foaming agent and an initiating agent; preparing a water phase by adopting water, a dispersant and NaCl; adding the oil phase into the water phase, lowering the temperature after a temperature rising process, discharging, washing, extracting, drying and screening to obtain polystyrene series styrene-divinylbenzene copolymers of the pollution-resistant deeply-softened chelating resin; then performing chloromethylation reaction, and transforming to obtain polystyrene series chloromethylated beads; performing stirring expansion on the polystyrene series chloromethylated beads by using dichlorethane, adding N-hydroxymethyl phthalimide, dropwise adding a catalyst, heating, preserving the temperature, cooling, pumping out mother liquor, adding water, performing reduced pressure distillation, and cleaning; and adding 25% caustic soda liquid, heating, stabilizing, washing with water, adding a chloroacetic acid solution to perform chelation reaction, heating, preserving the temperature, washing with water, performing acid regulation, washing with water, performing alkali regulation, washing with water until the mixture is neutral, and discharging for package to obtain the pollution-resistant deeply-softened chelating resin.

The invention provides a one-step formed hollow fiber nanofiltration membrane filament and a preparation method thereof, and solves the problems that the nanofiltration membrane preparation process istedious and the thickness of a coating layer or the cross-linking reaction degree is difficult to control. In the spinning process, a hydrophilic polyethyleneimine hydrophilic group can automaticallymigrate to the surface of a membrane for synchronous cross-linking reaction with glutaraldehyde or ethylene glycol in a core liquid in a phase separation process, a non-solvent phase separation process of a base membrane and a cross-linking reaction of a nanofiltration selection layer are carried out synchronously, by controlling the spinning speed and the core liquid temperature, interfacial polymerization or post-cross-linking step is not needed, and the internal pressure type hollow fiber nanofiltration membrane can be obtained by one-step forming.

The invention provides a sewage treatment method using A / O biological contact oxidation process belonging to environmental engineering technology field, which solves the problems that in the prior art the adaptability of water quality is not strong, the impact resistance perfermance is weak, the effluent water quality is unstable and sludge bulks or the like. The sewage treatment method using A / O biological contact oxidation process comprises the following steps: A. pretreatment; B. hydrolytic treatment; C. aeration treatment; D. deposition and disinfection, and has advantages of high volume loading, rapid rate of biodegradation and low cost.

The invention relates to the technical field of separation membrane preparation, in particular to a hollow fiber composite nanofiltration membrane and a preparation method thereof. The method comprises the following steps: preparing a hollow fiber ultrafiltration membrane by adopting a composite thermally induced phase separation method, and finally preparing the hollow fiber composite nanofiltration membrane by taking the prepared hollow fiber ultrafiltration membrane as a base membrane and adopting a chelating auxiliary surface coating method. The chelating auxiliary surface coating method used in the invention has the advantages of mild reaction, environmental friendliness and easiness in operation. According to the prepared hollow fiber composite nanofiltration membrane, the permeation flux of the membrane is close to 6 times that of a polyamide hollow fiber composite nanofiltration membrane formed by a traditional interfacial polymerization method on the premise that the retention rate of dye is basically unchanged, the application is expected to be applied to the field of printing and dyeing wastewater treatment, and a new generation of high-flux composite nanofiltration membranes is provided.

The invention provides a novel sewage treatment unit which has small and exquisite appearance and convenient use and has various current input modes. Moreover, a diamond coating electrode is used and has very strong pollution resistance, and an electrolytic bath is easy to wash. The invention is a sewage treatment unit suitable for outdoor use.

The invention provides an ozone wear-resisting environment-friendly ecological board and a production process thereof. The ozone wear-resisting environment-friendly ecological board comprises a board core, middle boards, poplar veneers and ozone wear-resisting decorative film adhesives. The upper surface and the lower surface of the board core are coated with the middle boards correspondingly, and a board blank is formed through integral press-fitting. The upper surface of the board core and the corresponding middle board are in glued connection in a glued manner, and the lower surface of the board core and the corresponding middle board are in glued connection in a glued manner. The upper surface and the lower surface of the board blank are coated with the poplar veneers correspondingly, and a base board is manufactured through cold and hot pressing and integral molding. The upper surface of the board blank and the corresponding poplar veneer are in glued connection in a glued manner, and the lower surface of the board blank and the corresponding poplar veneer are in glued connection in a glued manner. The ozone wear-resisting decorative film adhesives are attached to the upper surface and the lower surface of the base board correspondingly, and the finished ozone wear-resisting environment-friendly ecological board is obtained through hot pressing and integral molding. The surface wear-resisting performance of the ecological board is improved, the service life is prolonged, meanwhile, the content of negative ions in air can be increased through contained negative ion components, and human health and indoor air purification are facilitated.

The invention discloses a few friction pair seawater desalination high-pressure pump and energy recovery integrated unit. The integrated unit comprises a seawater hydraulic pump and a seawater hydraulic motor, wherein two sliding shoe pairs in a traditional swash plate type plunger pump are reduced. A structural form that a pump and a motor are arranged on two sides of a main shaft turntable is adopted, a pump end flow distribution swash plate is communicated with a low-pressure seawater inlet and a high-pressure seawater outlet, and a motor end flow distribution swash plate is communicated with a low-pressure strong brine outlet and a high-pressure strong brine inlet. During working, the motor drives the hydraulic pump to suck raw seawater and pressurize, the generated high-pressure seawater is filtered by a reverse osmosis film into the high-pressure strong brine to enter the hydraulic motor, and the high-pressure strong brine is discharged through a low-pressure strong brine outletafter energy recovery is completed. The integrated unit is advantaged in that an energy recovery device overcomes defects that an energy recovery device is low in integration level, large in number offriction pairs, capable of mixing salt / seawater and the like, and the integrated unit has obvious technical advantages of high energy recovery efficiency, no mixing, long service life and the like.

The invention provides a pollution-proof special effect panel and a making method thereof, the pollution-proof special effect comprises a PE (poly ethylene) protection film, a pollution-proof surface paint coating, a pollution-proof bottom paint coating, a steel plate and a back paint coating which are successively arranged from top to down and closely combined together, and the making method of the pollution-proof special effect panel comprises the following steps: coating the back surface of the a PE electronic membrane with a polyurethane adhesive, then curing to form a first adhesive layer, namely the PE membrane; coating by a roller the front surface of the prepared steel plate with polyester resin paint, then curing and drying to form the pollution-proof bottom paint coating. The pollution-proof special effect panel prepared by the technical method has better surface pollution-proof property, lower relative cost, superior performance, and especially strong pollution-proof performance which is very popular with consumers compared with a common composite steel plate, and the pollution-proof special effect panel fills technical gaps in the field of pollution-proof special effect panels in China.

The invention relates to a cold rolling and rough rolling lubricating agent for a copper and copper alloy sheet strip. 32# oil for a total-loss system is used as base oil and is matched with various composite additives including an anti-wear agent, an oiliness agent, an anti-oxidant and anti-corrosive additive, a metal deactivator, an anti-foaming agent, a dispersing agent and the like. The lubricating agent has the characteristics of relatively high viscosity, thick and firm oil film, high allowable pressure, good cooling performance and flowability and strong pollution, emulsion and foam resistance so as to be suitable for being used under the working conditions of hard rolled pieces and high rolling pressure.

The invention relates to a modified nanofiltration membrane suitable for recycling industrial wastewater, and a production method and an application thereof. The method comprises the following steps: grafting polyethersulfone (PES) with polyethylene glycol methyl ether methacrylate (PEGMA) to obtain hydrophilic PES-g-PEGMA, blending the hydrophilic PES-g-PEGMA with polyvinyl butyral (PVB), and carrying out an immersion precipitation phase inversion technology to produce the PES-g-PEGMA / PVB blend nanofiltration membrane. The nanofiltration membrane produced in the invention has the advantages of simplicity in production, low cost, mild reaction process, strong hydrophilic property, large water flux, high retention rate and strong anti-pollution capability, and is suitable for reusing industrial wastewater reclaimed water in the printing and dyeing industry and the pharmaceutical industry.

The invention relates to a method for synthesizing an integral bed for cracking solution analysis, which belongs to the technical fields of biomelecule analysis and chromatographic analysis. The method comprises the following steps: mixing metacrylic acid ester containing an epoxy terminal group or an acrylic ester monomer containing the epoxy terminal group with cross-linking agent, pore-forming agent and initiating agent to obtain a reaction mixture; uniformly mixing the mixture in an ultraphonic way, adding the mixture into a chromatographic column pipe and carrying out in-situ polymerization to form an integral bed; after polymerization reaction is finished, washing the integral bed by organic solvent; modifying the integral bed by amine modifying agent dissolved in the organic solvent; after modification reaction is finished, washing the integral bed by the organic solvent. The invention has the key point of controlling the hole structure and the modifying density of the integral bed. The integral bed synthesized by the method can analyze cracking solution which is not preprocessed and contains a plurality of impurities, the analyzing process is convenient and rapid, and the cost is low.

The invention relates to a reflection heat insulation and preservation veneer integrated external wall panel sectional material which is composed of a heat preservation layer and a veneer layer, wherein the heat preservation layer and the veneer layer are pressed to form a whole. The heat preservation layer is an existing external wall external heat preservation sectional material product made of inorganic mineral materials in the market. The veneer layer is formed by preparing ten raw materials of waste stone detrital materials, hollow glass micro-beads, vitrified micro-beads, rare-earth oxides, rutile, waterborne emulsion, inorganic adhesives, wood fiber, polypropylene short fiber and film formation auxiliaries and water. An overall composed, pressed and formed structure of the heat preservation layer and the veneer layer is adopted for the sectional material, the structure is used for an external wall body, safety is high, solar radiant heat absorbed by a building can be reduced, temperature rising caused by solar radiation absorbed by the surface of the building is prevented, heat transmitted into a room is reduced, the heat preservation and insulation requirement of the building outer wall body is met, and the purposes of providing comfortable indoor and outdoor environments, saving energy and lowering consumption are achieved.

The present invention belongs to the field of external wall coating technology, in the concrete, it relates to a semi-toughness fluorosilicone acrylic resin and its preparation method. It is made up by using (by wt%) 10%-45% of fluororesin, 15%-50% of elastic acrylic resin, 1%-8% of organic silicone. 2%-6% of diisocyanate and 20%-37% of solvent, through cross-linking reaction process.

The invention discloses a strong pillar porcelain insulator for high-voltage lines, which comprises an insulator body, an upper steel cap and a lower steel cap. The insulator body has a bone cylinder, an upper core head and an The lower core head and the bone cylinder are provided with large and small umbrella skirts at intervals, the upper core head is provided with annular grooves and insertion grooves, the inner surface of the upper steel cap is provided with annular bosses at intervals, and the upper steel cap and Connectors are arranged between the upper core heads, annular grooves are arranged at intervals along the axial direction of the lower core head, annular grooves are arranged at intervals on the inner surface of the lower steel cap, and the lower steel cap and the lower core head There are clamping parts between them. The present invention has high mechanical strength, excellent electrical performance, stable and reliable quality, high mechanical impact resistance, strong pollution resistance, small maintenance workload, and low cost, which can fully meet the requirements of 110‑330KV Technical requirements for pillar porcelain insulators for high voltage transmission lines.

The invention provides a forced overflow type graphene oil-containing sewage treatment device. A tank is a horizontal cylindrical sealed container, and a nitrogen inlet is arranged at the top of the tank; an oil-containing sewage inlet is connected with an oil-water separation chamber, and a water distribution tube A is arranged in the periphery of the upper part of the oil-water separation chamber; the left side of the oil-water separation chamber is an oil receiving chamber, and the right side of the oil-water separation chamber is a sewage chamber; a water permeation hole is arranged between the oil-water separation chamber and the sewage chamber; the right side of the sewage chamber is a water production chamber, and a water distribution tube B is arranged between the sewage chamber and the water production chamber; a graphene-based screen membrane is distributed below a water spray tube at the upper part of the water production chamber, and an oil receiving tank is arranged at the tail part of the graphene-based screen membrane; an oil receiving tube is arranged at the bottom of the oil receiving tank; and a water tube is arranged at the bottom of the water production chamber. The device has the advantages of high oil removal efficiency, small occupied area, high resistance to pollution, wide inlet water quality requirements, satisfactory adaption to the oilfield sewage conditions, and simple matched treatment process flow.

The invention provides a piezoelectric electro-hydraulic servo valve and a control method thereof. The pre-stage pressure of the servo valve is controlled through a piezoelectric driving scheme, so that the displacement and the output flow of a main valve element of the servo valve are controlled. The piezoelectric electro-hydraulic servo valve comprises a piezoelectric driving device, a controller, an LVDT displacement detection device, a fixed baffle, a throttler and a valve element; the LVDT displacement detection device acquires a valve element displacement signal and sends the valve element displacement signal to the controller; the controller receives an input signal of the servo valve and the valve element displacement signal and outputs a control signal; the piezoelectric driving device receives the control signal, controls the electro-hydraulic servo valve to generate a controllable pre-stage pressure, and generates an acting force for driving the valve element; and the fixedbaffle and the piezoelectric driving device form a variable throttling hole. According to the invention, by the piezoelectric driving scheme, a brand-new electro-hydraulic servo valve variable throttling scheme is formed; a complete control strategy of the servo valve is completed through an electric closed loop; and the piezoelectric electro-hydraulic servo valve has the advantages of pollution resistance, convenience in mounting and adjustment and reliable performance.

The invention discloses a piston pump, solving the problems that in the prior art, a piston pump is complex in structure and poor in efficiency. The piston pump comprises a shell, an oil outlet is formed in the shell, a pump core assembly is arranged in the shell, and at least one set of four-phase oil suction and discharge mechanism is arranged on the pump core assembly; an upper end cover and a lower end cover are arranged at the front end and the rear end of the shell respectively, and the front end of the pump core assembly is connected with a transmission mechanism arranged on the upper end cover; and an oil inlet corresponding to the pump core assembly is formed in the lower end cover. According to the piston pump, the two sets of four-phase oil suction and discharge mechanisms are adopted, four times of oil suction and discharge can be completed every time the four-phase oil suction and discharge mechanisms rotate by one circle, the mechanism is greatly simplified, the structure is simple, the weight is light, the rotor mass is light, the mechanical loss is small, and the efficiency is high.

The invention relates to the technical field of antifogging of resin spectacle lenses, in particular to a wear-resistant antifogging easy-to-clean resin spectacle lens and a manufacturing method thereof. The two surfaces of the resin lens comprise five layers of structures from inside to outside, namely a first silicification hardening film layer, a second nanometer aluminum oxide film layer, a third composite antireflection film layer, a fourth nanometer silicon dioxide film layer and a fifth nanometer super-hydrophilic anti-fog film layer. The manufacturing method of the wear-resistant anti-fog easy-to-clean resin spectacle lens comprises the following steps: plating a silicification hardening film layer on the resin lens; sequentially plating a nano aluminum oxide film layer, a composite anti-reflection film layer and a nano silicon dioxide film layer on the resin lens in vacuum; enhancing and activating the film layers of the resin lens; plating a nano super-hydrophilic anti-fog film layer on the resin lens and the like. Through the steps, the problems of surface fogging, blurred sight and the like under the scenes of alternate cooling and heating, hot food and hot soup during dining in winter, wearing of masks and the like of the spectacle lenses are fundamentally solved, and great convenience is brought to vast spectacle wearers.