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

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 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 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 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 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) 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 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.