47results about How to "Long service period" patented technology

The invention discloses a surface modifying method of an orthopedic implanted medical instrument. An active strontium salt and a bisphosphonate are loaded on the surface of the implanted instrument. In-situ long-time controllable release of the active strontium salt (osteogenic component and bone resorption inhibitor) and bisphosphonate (bone resorption inhibitor) around the implanted instrument, synergistic effect of the active strontium salt and the bisphosphonate is utilized, and inhibiting of absorption of original bones and promoting of generation of new bones are realized so as to achieve the objective of quick-sound integration of an orthopedic transplanted device (prosthesis) with surrounding bone tissue. The orthopedic implanted instrument realizing surface modification through the method is especially suitable for treatment of pathologically induced bone absorption and fracture patients.

The invention discloses a reaction-type flame-retardant epoxy resin microcapsule. The reaction-type flame-retardant epoxy resin microcapsule comprises a capsule core and a capsule wall, wherein the capsule core is 30 to 70 percent by mass of phosphorus-containing epoxy resin, and the capsule wall consists of the following ingredients by mass percent: 15 to 55 percent of phosphorus-containing acrylate, 15 to 45 percent of epoxy acrylate, 10 to 50 percent of a polymerizable emulsifier, 0.5 to 3 percent of an acrylate crosslink agent and 0.1 to 0.5 percent of a photoinitiator. The invention also discloses a method for preparing the microcapsule. The microcapsule has the following advantages that the flame resistance and self-repairing function are good, so that the microcapsule can be widely applied to the fields such as thermosetting self-repairing resin-based composite materials and coatings. The method for preparing the microcapsule adopts an ultraviolet interface in-situ polymerization method, so that not only is the process simple and less time consumed, but also the method is controllable, the safety of the prepared composite material can be improved, and the service life of the composite material can be prolonged.

An alkali and corrosion resistant anchor chain steel comprises 0.27-0.33wt% of C, 0.15-0.55wt% of Si, 1.4-1.6wt% of Mn, 0.035wt% or less of P, 0.015wt% or less of S, 0.001-0.003wt% of B, 0.03-0.05wt% of V, 0.1-0.25wt% of Cu, 0.025-0.035wt% of Als, 0.1-0.25wt% of Ni and 0.001-0.007wt% of Ca. A production method of the anchor chain steel comprises the steps of molten iron desulphurization, converter smelting, argon blowing, LF furnace refining, RH furnace vacuum treatment, blank casting, natural pile cooling to room temperature, rough rolling, finish rolling, and air cooling to room temperature. The production method can improve the alkali resistance of steel by above 45%, allows the anchor chain steel to have a long service life under alkaline conditions, and reduces the alloy content without reducing the material performances in order to reduce the production cost; the obtained alkali resistant anchor chain steel has excellent weldability and plasticity; and a converter technology has a high energy / efficiency ratio.

The invention relates to a multi-network type monodispersed polyacrylamide-based polymer gel microsphere and a preparation method thereof. A purpose of the present invention is mainly to solve the problem of insufficient stability of the existing polymer microspheres under high temperature and high salt conditions. According to the technical scheme, the polyacrylamide-based polymer gel microspherecomprises an acrylamide structure unit, an anionic monomer structure unit, a cationic monomer structure unit and a nonionic monomer structure unit, and further comprises a covalent bond cross-linkingagent structure unit, a high-valent metal cross-linking agent structure unit and a stabilizer structure unit, wherein the acrylamide structure unit, the anionic monomer structure unit, the cationic monomer structure unit and the nonionic monomer structure unit form a polymer main chain structure. With the technical scheme, the problem in the prior art is well solved. The product of the present invention can be used for deep profile control in oilfield development.

The invention discloses a method for preparing a silk fibroin base bi-metal antibacterial coating. The method comprises the following steps of: 1: adding silver nitrate powder and chloroauric acid powder into a silk fibroin solution to obtain a mixed solution A; 2: carrying out ultraviolet radiation on the mixed solution to obtain a mixed solution B; 3: dipping metal in a working solution to carryout light-avoidance dipping to obtain the metal of which the surface is provided with a polydopamine assistance layer; and 4: dipping the metal of which the surface is provided with the polydopamineassistance layer into the mixed solution B to form the silk fibroin base bi-metal antibacterial coating on the surface of the metal. Through the ultraviolet radiation, silk fibroin is subjected to in-situ reduction, the concentration of nano-silver particles and gold nanoparticles is lowered, meanwhile, since the polydopamine assistance layer is introduced into the surface of a metal substrate, the binding performance of the metal and the silk fibroin base bi-metal antibacterial coating is greatly enhanced, a long-term efficient synergetic sterilization function is realized, the problem of cell infection of an implant is effectively solved, and potential biotoxicity is reduced.

The invention discloses a method for preparing a functional coating containing nano-silver antibacterial peptide on a metal surface. The method comprises the steps that step one, silver nitrate powder and antibacterial peptide powder are added into a silk fibroin solution to be mixed, and a mixed solution A is obtained; step two, the mixed solution A is subjected to ultraviolet radiation reduction to obtain a mixed solution B; step three, after standardization of a Tris solution, dopamine hydrochloride is added, the metal is soaked, and the metal with a polydopamine auxiliary layer on the surface is obtained; and step four, the metal with the polydopamine auxiliary layer on the surface is soaked in the mixed solution B, and the functional coating containing the nano-silver antibacterial peptide is formed on the surface of the metal. According to the invention, silver ions are reduced into nano-silver through silk fibroin by adopting an ultraviolet radiation method, the particle size and morphology of nano-silver particles are effectively controlled, coordination bonds are formed between antibacterial peptides and nano-silver, enrichment of the antibacterial peptides on the surfaces of the nano-silver particles is promoted, the antibacterial peptides are in a nano-scale dispersed state in the nano-silver-containing antibacterial peptide functional coating, and long-term high-efficiency sterilization under the condition of low antibacterial agent dosage is realized.

The invention discloses a sucker rod with an ultra-high molecular weight polyethylene protective layer and belongs to the technical field of oil extraction equipment. The sucker rod is characterized in that a ultra-high molecular weight polyethylene plastic pipe with a shape memory function is used, the pipe is sleeved on the sucker rod and heated, the pipe is recovered to an original shape under the stimulation of heat, and accordingly, the sucker rod is provided with the ultra-high molecular weight polyethylene protective layer.

The invention provides a preparation method and application of a water-soluble hydrophobic-oilphobic modification material. The material is manly prepared by hybridizing hydrophobic-oilphobic components and colloidal network, specific components mainly include a solvent, the hydrophobic-oilphobic components, a network body and a modifier; and mixing and reaction on solutions can be carried out soas to obtain the stable water-soluble hydrophobic-oilphobic modification material. The preparation method of the water-soluble hydrophobic-oilphobic modification material disclosed by the invention has the advantages of simple process, low cost, strong adaptability and the like, raw materials are environmentally friendly and a human body is healthy and has no toxicity; and meanwhile, the preparedwater-soluble hydrophobic-oilphobic modification material can be mixed with the water in any proportions to obtain a mixture; and the mixture is added in the raw materials such as latex paint and finish-coat paint, so that the material has the properties, including hydrophobic property, oleophobic property, high strength, scrub resistance, stain resistance and the like, and can be applied to the fields of waterborne coatings for buildings, surface protection, oil-water separation, clothing decoration, outer-layer protection of electronic products and the like.

The invention provides a mud sand pump impeller provided with a supra polymer weight polyethylene protection layer, and belongs to the technical field of general-purpose equipment. The mud sand pump impeller is characterized in that ferrous metal material is utilized to be made into an inner frame of the mud sand pump and a part matched with other parts of the mud sand pump, and supra polymer weight polyethylene material is wrapped on the frame in a mould pressing mode. As the abrasion-resistant performance and corrosion-resistant performance of supra polymer weight polyethylene are higher than those of cast iron material and traditional protection paint, the service period of the mud sand pump is prolonged. As the ferrous metal material is utilized to be made into the inner frame of the mud sand pump and the part matched with the other parts of the mud sand pump, and mechanical strength of the mud sand pump impeller and matching accuracy of the other parts of the mud sand pump are guaranteed.

The invention discloses a laser strengthening technology for the surface of a steel rail of a railway. The laser strengthening technology includes the steps that the surface of the steel rail is quenched through lasers, and then a tempering technology is carried out on the steel rail through lasers. Microscopic structures of the steel rail are tempered martensite structures and are optimized with a laser processing technology, evenly-refined sorbite-or-troostite-similar tempered structures with the thickness of 0.8 mm to 1 mm can be obtained on the surface of the steel rail, high rigidity (HRC35-50) and high abrasion resistance are achieved, and meanwhile high bending strength and high fatigue strength are achieved; the sticking resistance, the creeping resistance, the squashing resistance, the side abrasion resistance and the corrugation resistance of the steel rail are improved accordingly. By means of the laser strengthening technology, corrugation, side abrasion and block falling of the steel rail are remarkably reduced on the premise that the mechanical performance such as bending strength, breaking tenacity and fatigue strength of the whole steel rail is guaranteed, the stability and the corrosion resistance of the steel rail are remarkably improved, the service life of the steel rail is remarkably prolonged, the replacement time of the steel rail is prolonged, the maintenance cost of the steel rail is saved, driving resistance is reduced, fuel is saved, and the service period of the steel rail of the railway is prolonged.

The invention discloses a biogas generating pit for co-processing domestic garbage and human dejecta of rural scattered inhabitants. The biogas generating pit comprises a main fermenting tank, a second grille fermenting tank, human dejecta and domestic garbage inlets and biogas slurry and biogas residue outlets, wherein the human dejecta and the domestic garbage are delivered into the main fermenting tank through the dejecta and domestic garbage feed inlets; the main fermenting tank is connected with the second grille fermenting tank; a separating grille is arranged between the main fermenting tank and the second grille fermenting tank and used for separating biogas slurry and biogas residues; the second grille fermenting tank is connected with the biogas slurry outlet; and the main fermenting tank is connected with the biogas residue outlet. The biogas generating pit has the advantages of comprehensively considering the processing and resource utilization of the domestic garbage and the human dejecta, and overcoming the defect of the conventional underground biogas generating pit that gas production is low in winter because of low temperature. The biogas generating pit can turn the biogas slurry and the biogas residues into fertilizers and return into the field directly, and can provide an engineering reference for controlling rural widespread pollution and improving rural ecology and environment.

The invention discloses an organic-inorganic hybrid type soil water-blocking agent. A solvent, a penetrating agent and a reinforcing agent are uniformly mixed in a mass ratio of 10-99% to 0.01-30% to0.01-80%, are added into a reaction kettle for being heated and stirred, and a water-blocking agent finished product is obtained after a solution is stable. The organic-inorganic hybrid type soil water-blocking agent has the advantages of being simple in preparation process, small in usage amount, low in cost, long in service life, stable in component, adjustable in structural strength of a curedproduct, and the like. Besides, the material is wide in using range, is convenient for using local materials for a project, and only through adjusting the ratio of main components, the stabilizer material is used for application fields such as water-soil conservation, debris flow placement, roadbed reinforcing, and petroleum and gas development, so that engineering cost is greatly reduced, and construction time is shortened.

The invention relates to metal powder for repairing a supporting roll based on a laser coaxial powder feeding process and a preparation method of the metal powder. The powder comprises, in percentageby mass, the following chemical components of 0.4-0.5% of C, 0.2-0.5% of Si, 0.2-0.5% of Mn, <=0.02% of P, <=0.015% of S, 4.5-5.5% of Cr, 0.15-0.82% of Ni, 0.2-0.4% of Mo, 0.1-0.2% of V, <=0.03% of O,<=0.03% of N and the balance of Fe and inevitable impurities. The metal powder is successfully applied to cold roll laser coaxial powder feeding repair, the Rockwell hardness is 52-58HRC, the on-lineservice cycle of the repaired supporting roll is 45-51 days, the on-line service cycle is long, and the service life of the supporting roll is prolonged.

The invention discloses corrosion-resistant mooring chain steel and a preparation method thereof. The corrosion-resistant mooring chain steel comprises the following components in percentage by weight: 0.27-0.30% of C, 0.15-0.35% of Si, 0.6-1.2% of Mn, 0.8-1.0% of Cr, 0.2-0.5% of Mo, not greater than 0.015% of P, not greater than 0.005% of S, 0.001-0.003% of B, 0.03-0.05% of V, 0.3-0.4% of Ni, 0.1-0.25% of Cu, 0.060-0.083% of Nb, 0.025-0.035% of Als, 0.1-0.25% of Ni, 0.001-0.007% of Ca, and the balance of Fe and residual trace elements. The preparation method comprises the following steps of (1) performing smelting through an electric furnace or a converter; (2) performing refining with an LF furnace; (3) performing RH vacuum degassing; (4) performing continuous casting; (5) performing heating with a blank casting heating furnace; (6) performing rolling; (7) performing forging; and (8) performing quenching and tempering heat treatment and the like. The corrosion-resistant mooring chainsteel prepared by the preparation method disclosed by the invention is simple in technological process, industrialization is easy to realize, and the corrosion-resistant mooring chain steel is suitable for popularization and use.

The invention relates to a method for forming an organic-inorganic hybrid super-hydrophobic anti-corrosion coating on the surface of carbon steel, which is to scrape and coat the coating liquid on the surface of the carbon steel, and when the coating liquid reaches a semi-cured state, place a super-hydrophobic nano SiO 2 Dip in the dispersion liquid, take it out and heat it for curing, so as to form an organic-inorganic hybrid superhydrophobic anti-corrosion coating on the surface of carbon steel. The coating solution is obtained by adding modified mesoporous molecular sieves loaded with corrosion inhibitors, amino silicone oil, dispersant and curing agent to epoxy resin ethyl acetate solution, and dispersed evenly. The modified mesoporous molecular sieves loaded with corrosion inhibitors Molecular sieves are modified mesoporous molecular sieves with silane coupling agents and loaded with triazine-based corrosion inhibitors. The anticorrosion coating prepared by the invention improves the corrosion resistance of the coating while solving the problem of easy corrosion of the carbon steel surface.

The invention discloses a clutch and reversing device comprising an input shaft part, a clutch and reversing part, an output shaft part, etc. The clutch and reversing device is characterized in that when a clutch slippage sleeve is arranged between an input shaft gear and an output shaft gear, steel balls in drill holes radially and uniformly distributed in sleeves of the input shaft gear and the output shaft gear are all positioned in countersink sections of an inner hole of the slippage sleeve, when an input shaft rotates, the steel balls are extruded out of input shaft ball sockets, and the input (or output) gear idles on the input shaft so as to realize the separation of a clutch. When the slippage sleeve moves towards the right side, transition inclined planes between the inner hole and countersinks of the slippage sleeve are gradually pressed down by the steel balls, then the steel balls are pressed and enter a circle of radially and uniformly distributed ball sockets at the right side of the input shaft, the input shaft and the output shaft gear are wedged into a whole, and an output shaft rotates along with the input shaft in the same direction; and the output shaft can rotate reversely when the slippage sleeve moves towards the left side. The clutch and reversing device can realize separation and reversion under the work condition of high rotation difference.

The invention provides a PTFE (polytetrafluoroethylene) flat membrane. The PTFE flat membrane adopts a 3D communicated pore structure, stem holes are formed in stems surrounding pores, the diameter ofpores is 200 plus / minus 100 nm, the diameter of stems is 125 plus / minus 25 nm, and the diameter of stem holes is 45 plus / minus 25 nm; the porosity of pores is 60% plus / minus 10% and the porosity of stem holes is 55% plus / minus 10%; the ratio of the total surface area of stems to the total surface area of stem holes is (15-30):1; the membrane thickness is larger than 10 mu m. The PTFE flat membrane has long service life and excellent anti-fouling performance.

The invention provides a PTFE (polytetrafluoroethylene) hollow fiber membrane. The PTFE hollow fiber membrane adopts a 3D through pore structure, stem holes are formed in stems surrounding pores, thediameter of pores is 800 plus / minus 200 nm, the diameter of stems is 500 plus / minus 100 nm and the diameter of stem holes is 175 plus / minus 25 nm; the porosity of the pores is 60% plus / minus 10% and the porosity of the stem holes is 55% plus / minus 10%; the ratio of the total surface area of the stems to the total area of the stem holes is (16-30):1; the inner diameter is not larger than 2 mm. ThePTFE hollow fiber membrane has long service life and good treatment efficiency.

The invention discloses a hollow fiber desalination membrane assembly and equipment for brackish water desalination. The hollow fiber desalination membrane assembly comprises a pressure container anda desalination membrane unit arranged in the pressure container, wherein the desalination membrane unit comprises a membrane casing and a hollow fiber membrane unit arranged in the membrane casing; the hollow fiber membrane unit comprises a six-hole guide plate, a central water producing pipe, multiple desalination membrane wires winding around the peripheral side of the central water producing pipe as well as a water inlet end fixing layer and a water producing end fixing layer which are fixed at the two ends of the desalination membrane wires respectively; a water inlet, a water producing port and a concentrated water port are formed in the hollow fiber desalination membrane assembly. The hollow fiber desalination membrane assembly for the brackish water desalination is applicable to a technological system of the brackish water desalination, has higher anti-pollution capacity and longer service life, is good in service stability, long in service period and low in operating cost.

The invention discloses a permanent pavement structure fatigue reliability evaluation method based on parameter bounded distribution. The method comprises the following steps: 1) obtaining variability statistical characteristics of pavement design input parameters; 2) generating a random number conforming to a classic distribution model according to variability statistical characteristics of the obtained pavement design input parameters; (3) judging whether the generated random numbers conform to a specified interval range or not, and screening the random numbers conforming to the range until the random numbers conform to the parameter truncation distribution model of the specified statistical characteristics in the step (1); 4) establishing a limit state equation Z of a pavement structure fatigue index and an accumulated equivalent axis number; (5) judging the state of the structural performance function according to the steps (3) and (4); (6) setting the cycle index N, repeating the steps (2)-(5), and counting the number p of times when Zi is greater than 0 and the number q of times when Zi is less than 0; 7) based on the step 6), drawing a reliability convergence curve of p / (p + q), and judging reliability convergence; and 8) obtaining the reliability of the pavement structure.

The invention provides a PTFE (polytetrafluoroethylene) flat membrane. The PTFE spiral-wound membrane adopts a 3D communicated pore structure, stem holes are formed in stems surrounding pores, the diameter of pores is larger than 300 nm and smaller than 600 nm, the diameter of stems of larger than 200 nm and smaller than 400 nm, and diameter of stem holes is larger than 70 nm and smaller than 150nm; the membrane thickness is larger than 10 mu m; the porosity of pores is 60% plus / minus 10%, and the porosity of stem holes is 55% plus / minus 10%; the ratio of the total surface area of stems to the total surface area of stem holes is (1-15):1. The PTFE flat membrane has long service life and excellent anti-fouling performance.

The invention provides a PTFE (polytetrafluoroethylene) separation material. The separation material adopts a 3D communicated pore structure and is characterized in the stem holes are formed in stemssurrounding pores; the diameter of the stem holes is larger than or equal to 100 nm and smaller than 200 nm. The PTFE material has a special microstructure, stable and firm fiber state and stem hole structure, good durability of separation performance and long service life.

The invention provides a PTFE (polytetrafluoroethylene) hollow fiber membrane. The PTFE hollow fiber membrane adopts a 3D through pore structure, stem holes are formed in stems surrounding pores, thediameter of pores is 200 plus / minus 100 nm, the diameter of stems is 125 plus / minus 75 nm and the diameter of stem holes is 45 plus / minus 25 nm; the porosity of the pores is 80% plus / minus 10% and theporosity of the stem holes is 30% plus / minus 15%; the ratio of the total surface area of the stems to the total area of the stem holes is (1-15):1; the inner diameter is not larger than 2 mm. The PTFE hollow fiber membrane has long service life and good treatment efficiency.

The invention relates to the technical field of nuclear power station closed circuit television monitoring systems, and specifically discloses an improved irradiation-resistant closed circuit television monitoring system. The system comprises a display, a video matrix, a plurality of cameras, a switching follower and a relay control box, wherein the video matrix is connected with the relay control box through the switching follower; the relay control box is connected with respective independent power supplies of the plurality of cameras respectively; and the plurality of cameras are connected with the video matrix in order that video signals transmitted by the cameras are displayed on the display which is connected with the video matrix through the video matrix. According to the system, independent power supply control is implemented on irradiation-resistant cameras, so that the functions of conventional cameras are not influenced while the irradiation-resistant cameras are effectively protected. Through adoption of the system, the service lives of the irradiation-resistant cameras can be prolonged to two refueling cycles or more; subsequent investments of a user are reduced; investment benefits are increased; and the later-stage maintenance workload is lowered.

The invention provides a preparation method of a macromolecular semipermeable material. An electrostatic spinning is adopted and comprises steps of preparation of spinning emulsion, spinning and sintering, wherein continuous sintering under controlled temperature and controlled pressure is adopted. The preparation method of the macromolecular semipermeable material with a novel structure is provided.

The invention provides a PTFE (polytetrafluoroethylene) separation material. The separation material adopts a 3D communicated pore structure and is characterized in the stem holes are formed in stemssurrounding pores; the ratio of the total surface area of stems to the total surface area of stem holes is (1-30):1; the diameter of stem holes is larger than or equal to 100 nm and smaller than 200 nm. The PTFE material has a special microstructure, stable and firm fiber state and stem hole structure, good durability of separation performance and long service life.