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167results about How to "Enough thickness" patented technology

Method for welding anticorrosion steel pipeline with no internal repaired mouth

InactiveCN103008988AReduce the chance of welding defectsRigid enoughArc welding apparatusChemical industryAlloy
The invention provides a method for welding an anticorrosion steel pipeline with no internal repaired mouth, which is applicable to the anticorrosion treatment of a steel pipeline welding connector with an anticorrosion coating in the petroleum industry and the chemical industry. The method is characterized in that a groove with a certain length and depth is machined on a position which is at a certain distance from the end part of the steel pipe, an anticorrosion alloy material is surfaced on the groove, the end part of the surfaced steel pipe is machined into a V-shaped groove, an anticorrosion coating with sufficient thickness is coated on the inner wall of the steel pipe, the anticorrosion coating covers sufficient length of the anticorrosion alloy surfacing layer, then two steel pipes are in butt connection with each other, layering welding is carried out after the two steel pipes are fixed on one point, an argon tungsten-arc welding method is adopted, the anticorrosion alloy material which is identical to that of the surfacing is selected as the filling material, and argon is filled into the pipe to protect the pipe in the welding process. Due to the adoption of the novel technology for welding the anticorrosion steel pipeline with no internal repaired mouth, the corrosion resistance of the inner wall and a weld mouth of the pipeline can be guaranteed, the internal mouth repairing technology on the spot after the welding can be avoided, characteristics such as simplicity in construction and reliability in performance can be realized, and the method is suitable for the real engineering application of the petroleum and chemical industry fields.
Owner:HARBIN INST OF TECH

Door body used for cold storage and refrigeration device and cold storage and refrigeration device

The invention relates to a door body used for a cold storage and refrigeration device and the cold storage and refrigeration device. Particularly, the door body used for the cold storage and refrigeration device comprises a panel used for forming the front portion of the door body, a door liner used for forming the rear portion of the door body, two side frames used for forming the two side portions of the door body, a rear cover and a display control assembly. The rear cover is arranged between the panel and the door liner, and a containing cavity is defined by the rear cover and the panel. The display control assembly is arranged in the containing cavity. The two side frames are provided with through holes communicating with the containing cavity so as to form a heat dissipation channel transversely penetrating through the door body, air convective circulation is facilitated, heat is dissipated out in time conveniently, and accordingly the heat dissipation efficiency and effect of the display control assembly are ensured. The invention further provides the cold storage and refrigeration device. The cold storage and refrigeration device comprises a refrigerator body with a defined storage space and the door body, and the door body is directly or indirectly connected to the refrigerator body so as to open and/or close at least part of the storage space.
Owner:HAIER SMART HOME CO LTD

Crystallizer casting powder for austenite antibacterial stainless steel

ActiveCN103785808AMeet the needs of shrinkage characteristicsGood control of heat transferHeat resistanceField tests
The invention discloses continuous casting crystallizer casting powder for austenite antibacterial stainless steel. The alkalinity of the continuous casting crystallizer casting powder ranges from 1.0 to 1.1, and the continuous casting crystallizer casting powder can achieve a very good heat transfer control effect and meet the requirement for shrinkage characters of the austenite antibacterial stainless steel. The viscosity is set as 0.10 Pa*s-0.18 Pa*s at the temperature of 1300 DEG C, so that the casting powder flows in gaps between blank shells and a crystallizer copper plate more evenly, casting blanks are lubricated, the requirement for the consumption of the crystallizer casting powder is met, and the viscosity is mainly controlled Al2O3, MgO and F-. The melting point ranges from 1130 DEGC to 1190 DEG C, heat resistance of the casting powder is increased, the heat transfer uniformity index of the crystallizer casting powder is increased, and cracks are difficult to produce. Raw materials of the continuous casting crystallizer casting powder are easy to obtain, and cost is relatively low. By means of field tests, the casting powder is melt uniformly and stably, the indentation rate of the edges of the casting blanks is decreased by about 9.5%-19%, quality of the casting blanks is improved, and smooth operation of processes of a steel mill is guaranteed.
Owner:XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD

Design method of variable inlet guide vane, and blade and compressor

ActiveCN106570213AReduce the average total pressure loss coefficientMeet Structural Integrity RequirementsGeometric CADDesign optimisation/simulationLeading edgeEngineering
The invention relates to the technical field of compressors, and especially relates to a design method of a variable inlet guide vane. The design method comprises the following steps: step S1, determining an inflow Mach number and an inlet flow angle and an outlet flow angle; step S2, determining a dimensionless angular distribution function; step S3, selecting a design point angle of attack of a blade profile, and determining a bending angle of the blade profile; step S4, determining the maximum relative thickness, and the thickness of a leading edge and a trailing edge of the blade profile; step S5, determining the position of the maximum relative thickness of the blade profile; step S6, determining a thickness distribution function; step S7, symmetrically stacking to obtain a blade; step S8, adding the leading edge and the trailing edge to the blade part; and step S9, performing numerical simulation on the blade profile obtained in step S8, and calculating the performance of the blade profile and judging whether the blade profile is suitable. The invention further provides the design method, which expands the range of an available inlet angle of attack, and reduces the average total pressure loss coefficient in a whole working condition range. The invention further relates to the design method of the variable inlet guide vane, and the blade made by the method.
Owner:BEIHANG UNIV

High-speed lower lubricating device for bearing ring

The invention discloses a high-speed lower lubricating device for a bearing ring. The high-speed lower lubricating device comprises an oil gathering sleeve, wherein an inner ring of a bearing and the oil gathering sleeve rotate synchronously; the inner wall of the inner ring of the bearing is respectively provided with a lubricating oil groove in an axial direction and a radial oil hole in a radial direction; one end of the radial oil hole is communicated with the lubricating oil groove, and the other end of the radial oil hole is communicated with a raceway of the inner ring of the bearing; the oil gathering sleeve and the inner ring of the bearing coaxially and fixedly sleeve a main shaft; the oil gathering sleeve is divided into two parts along the axial direction, the inner part of one part is provided with axial oil grooves butted with the lubricating oil groove, and the other part is radially provided with oil gathering passages which are in one-to-one butt joint with the axial oil grooves; the oil gathering passages are separated by a plurality of oil gathering blades distributed in the radial direction; an outer ring of the bearing is fixedly arranged on a shaft shell; the parts, which correspond to the oil gathering passages, of the shaft shell are provided with nozzles connected with a lubricating oil system. The high-speed lower lubricating device is capable of improving the bearing lubricating efficiency, reducing the lubricating oil quantity, further reducing the internal friction heat of the bearing and ensuring that sufficient oil film thickness exists in the raceway during high-speed rotation of the bearing.
Owner:CENT SOUTH UNIV

Novel load-bearing and heat-insulation integrated prefabricated fabricated-type shear wall and construction method

InactiveCN108149814AStable mechanical propertiesWith load-bearing functionWallsHeat proofingFiberBlade plate
The invention relates to a novel load-bearing and heat-insulation integrated prefabricated fabricated-type shear wall and a construction method, and belongs to the technical field of fabricated-type building construction. The novel prefabricated fabricated-type shear wall comprises an inner blade plate, an outer blade plate, a heat-insulation structure layer and a plurality of connecting pieces made of fiber reinforced plastic, wherein both the inner blade plate and the outer blade plate are provided with vertically-distributed steel bars and transversely-distributed steel bars. A restrained edge member area is provided with longitudinal stress steel bars, stirrups and first steel sleeves. According to the novel prefabricated fabricated-type shear wall, the thickness of a wall body is reduced, so that the effective usable area of a building is increased, the structures of the inner blade plate and the outer blade plate are optimized, so that the two sides of the heat-insulation structure layer are effectively protected, and the connecting pieces and the stirrups adopt the fiber reinforced plastic, so that heat-insulation performance of the heat-insulation structure layer is improved; and meanwhile, the wall body has excellent mechanical properties. The construction method has the advantages of being simple in operation, high in construction efficiency and the like.
Owner:SHANGHAI CONSTRUCTION GROUP

Method for checking anti-frost heaving damage of slope concrete lining layer of water conveyance canal in winter

The present invention relates to a method for checking anti-frost heaving damage of a slope concrete lining layer of a water conveyance canal in winter. The method is applied to the design of an open channel water conveyance canal and to perform a force analysis on a slope concrete lining layer under an 5 of canal base soil frost heaving. The method comprises: by using a canal slope concrete lining layer as a member with a slope foot as a fixed hinge support and a water level surface as a movable hinge support, establishing a mechanical model of checking the anti-frost heaving damage of a canal slope concrete lining layer; and determining, according to a stress generated by a transverse bending effect or / and a stretch-bending combination effect of the member and axial tensile strength of concrete, whether the slope concrete lining layer can resist the damage generated by a frost heaving effect. According to the method for checking anti-frost heaving damage provided by the present invention, influence of interaction between canal slope bidirectional freezing as well as a concrete lining layer and canal base soil deformation is considered; and a deficiency of a checking method of anti-frost heaving damage capacity of a slope concrete lining layer under the circumstance of water conveyance by a concrete canal in a permafrost region is made up.
Owner:SHIHEZI UNIVERSITY

Inhaler and atomization assembly thereof

The invention relates to an inhaler and an atomization assembly of the inhaler. The atomization assembly of the inhaler comprises a shell and an atomization core arranged to be combined with the shell. The shell comprises an outer shell and a breather pipe, a liquid storing cavity used for storing liquid is formed in the outer shell, a flat suction nozzle is formed at one end of the outer shell, and an inhaling hole is formed in the suction nozzle; an airflow channel is formed in the breather pipe, the breather pipe is located in the liquid storing cavity, one end of the breather pipe is connected with the atomization core, the other end of the breather pipe is connected with the outer shell, and the airflow channel is communicated with the inhaling hole. The cross section of at least part of the airflow channel is flat, the part, with the flat cross section, of the airflow channel is close to the inhaling hole, and the shape of the airflow channel is matched with that of the suction nozzle. The cross section of the at least part of the airflow channel is flat to be matched with the flat suction nozzle, it is ensured that the outer shell and the breather pipe are thick enough, the product qualified rate is increased, the area of the cross section of the airflow channel is ensured, and therefore a user can suck the atomized liquid into the mouth easily.
Owner:SHENZHEN SMOORE TECH LTD

Method for nickeling carbon fiber/cyanate ester resin composite material

The invention discloses a method for nickeling a carbon fiber/cyanate ester resin composite material. The method comprises the following steps: pre-nickeling the surface of a pretreated carbon fiber/cyanate ester resin composite material through a chemical plating method, and then, nickeling by using an electroplating method. According to the method, chemical plating is combined with electroplating, the pre-nickeling procedure is carried out by the chemical plating method firstly to form a uniform conductive layer on the material surface, and then, the nickel layer is thickened by the electroplating method to both ensure the uniformity of the nickeling layer and ensure enough thickness for the nickeling layer, the problems of plating leakage and too thin plating layer when nickeling the surface of the carbon fiber/cyanate ester resin composite material in the prior art are solved, uniform and thick enough plating layer is obtained, the plating layer is uniform, integral, free of plating leakage phenomenon, good in binding force with a base material, free of gap and capable of meeting the application conditions of a space optical mirror, and the electroplating and chemical plating production costs are low, so that volume production can be realized.
Owner:XIAN UNIV OF TECH

Heat-sealing easy-to-repeatedly tear PE film and preparation method thereof

The invention discloses a heat-sealing easy-to-repeatedly tear PE film which comprises an inner layer, middle layer and surface layer which are sequentially stacked, wherein the inner layer is prepared from LDPE with melt flow index of 2g/10min and density of 0.926g/cm<3>, 3-6 parts of LLDPE with melt flow index of 2g/10min and density of 0.926g/cm<3>, 3-6 parts of metallocene LLPDE with melt flowindex of 2g/10min and density of 0.905g/cm<3> and 0.08 part of PPA masterbatch; the material No.1 of the middle layer is prepared from 10 weight parts of LDPE with melt flow index of 4g/10min and density of 0.920g/cm<3>; the material No.2 of the middle layer is prepared from 10 weight parts of hot melt adhesive; the hot melt adhesive is prepared from 3-6 parts of styrene-ethylene-styrene block copolymer, 1.5-3 parts of rosin resin and 1.5-3 parts of acrylonitrile-butadiene-styrene copolymer; the surface layer is prepared from 1.5-3 parts of LDPE with melt flow index of 2g/10min and density of0.926g/cm<3>, 3.5-7 parts of LLDPE with melt flow index of 2g/10min and density of 0.921g/cm<3> and 0.08 part of PPA masterbatch. The invention solves the problems that when a PE film composite bag is torn, the remaining product is not easily sealed for storage and refreshment.
Owner:青岛东海包装产业有限公司
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