33results about How to "Long mission life" patented technology

The invention discloses a construction method of an architectural structure gypsum board with paper surface hung ceiling. The construction method comprises the following steps of:1, installing a light steel keel; 2, installing a top facing gypsum board, namely, installing the top facing gypsum board on the installed light steel keel; reserving side interval joints between side walls on the periphery of the top facing gypsum board and a wall body; forming multiple transverse deformation joints on the top facing gypsum board, and distributing the multiple transverse deformation joints from front to back along the long direction of the top facing gypsum board; and dividing the light steel keel into multiple light steel keel frames by taking the multiple transverse deformation joints as boundaries, and disconnecting the two front and back adjacent light steel keel frames; and 3, constructing the side interval joints and the deformation joints, namely, closing in the transverse deformation joints by adopting first aluminium alloy end caps, and meanwhile closing in the side interval joints by adopting second aluminium alloy end caps. The construction method is simple in steps, reasonable in design, and simple and convenient in construction and operation, has high working efficiency and good construction effect and can be used for solving the problems of ugly appearance, easiness in occurrence of cracks and deformation and the like existing in the conventional gypsum plaster board.

The invention relates to a steel brake drum. The steel brake drum comprises a brake drum body, wherein the brake drum body is formed by integrally casting cast carbon steel or cast alloy steel; or is formed by integral spinning machining of a low-carbon steel plate; a brake working surface of the brake drum body is provided with a hardened layer; the surface hardness of the hardened layer is 180 to 241HBW; the cast carbon steel is any one of low carbon steel, medium carbon steel or high carbon steel; the cast alloy steel contains one or two alloy elements of chromium, nickel and molybdenum; the thickness of the low-carbon steel plate is 16 to 25mm, the tensile strength is greater than or equal to 360MPa, and the elongation percentage is greater than or equal to 24 percent; and the hardened layer is subjected to one or more of surface carburizing treatment, laser surface impact hardening treatment, nitriding treatment and surface rolling treatment. The brake drum disclosed by the invention is formed by integrally casting the cast carbon steel or the cast alloy steel, or is formed by integral spinning machining of the low-carbon steel plate, so that comprehensive performance of the steel brake drum is improved, and the service life of the brake drum is prolonged.

The invention discloses a modified aqueous paint coating process for an oil tank for a petroleum cave depot / an earthing storeroom. The process comprises the following operating steps of: (1) surface treatment before steel product coating; (2) environmental control; (3) coating construction; and (4) quality control. The invention formulates the coating process suitable for coating the oil tank in the petroleum cave depot / earthing storeroom with the modified aqueous paint. According to the process disclosed by the invention, the modified aqueous paint can be uniformly sprayed to the wall surface of a storage tank to satisfy the demand in the field of petroleum, so that the aqueous paint is in full contact with the oil tank. Moreover, the paint will not fall off from the oil tank, so that the coating quality is guaranteed, and the problem that the oil tank is rusted as an existing aqueous paint spraying method cannot achieve the using demand to lead to fall-off of the aqueous paint is solved.

The invention relates to an emulsion paint composition with a special artistic effect, and a preparation method and an application thereof, and concretely discloses a composition comprising pearlescent pigment and glass beads as a pigment and filler. The composition concretely comprises, by weight, 3-30 parts of the pearlescent pigment, 20-25 parts of the glass beads, 10-40 parts of an emulsion, and optionally selected 10-60 parts of water. The invention also discloses the preparation method and the application of the composition. The composition has the advantages of easiness in construction, good dust resistance, long service life, excellent artistic effect after coating, and broad application prospect.

The invention belongs to the field of installation and machining for doors, and particularly relates to a production method for an assembled door which is convenient to produce and install. The production method comprises the following production steps of: A, machining a door plate standard component, a door frame standard component and a door pocket standard component of a fireproof and antitheft door respectively; B, coating the surfaces of the exposed standard components in the standard components produced in step A; C, cutting and assembling the standard components produced in steps A and B to produce a door plate, a door frame and a door pocket; and D, assembling and installing the door plate, the door frame and the door pocket which are produced by cutting and assembling on a wall body. All the components of the convenient assembled door disclosed by the invention can be produced in batches simultaneously, and then assembled after a client selects a design, thus changing the traditional production mode, the components are low in production cost, high in production efficiency, short in production period, capable of being adjusted in height and width on the site, and high in flexibility; and the components are high in strength, good in integrality, more beautiful and long in service life after being assembled.

The invention discloses an Al2O3-cBN-based ceramic cutter material and a preparation method thereof, and belongs to the technical field of ceramic cutters. The ceramic cutter material comprises the following components in percentage by volume: 50%-80% of Al2O3, 10%-30% of cBN and 5%-20% of TiCN, wherein the sum of the volume percentages of Al2O3, cBN and TiCN is 100%. The preparation method of the material comprises the following steps: respectively weighing Al2O3 powder, cBN powder and TiCN powder according to the volume ratio of the raw material powder; dissolving ammonium citrate in deionized water to prepare a dispersing agent solution; ball-milling and mixing the raw material powder of each component and the dispersing agent solution, and conducting drying to obtain a mixed material; and putting the mixed material into a mold for oscillation pressure sintering. According to the invention, the problem of low bonding strength caused by mismatching of physical properties of Al2O3 and cBN is improved through TiCN, and dynamic pressure sintering is realized on the mixed material by adopting an oscillation pressure sintering technology in the preparation method, so that the high-performance Al2O3-based ceramic cutter material with high cBN content is obtained, and the high-performance Al2O3-based ceramic cutter material can be widely applied to the field of processing of difficult-to-process materials such as high-temperature alloys and the like.

The invention brings forward an environment-friendly degradable material based on a nanometer modifier. The material of the invention comprises the following raw materials (by weight): 40-80 parts of starch, 20-40 parts of cellulose, 10-20 parts of pectin, 5-12 parts of a nanometer modifier, 5-8 parts of dimethyl siloxane, 35-80 parts of polyvinyl chloride, 1-4 parts of a cross-linking agent, 0.5-1.0 part of phthalic acid di(2-ethylhexyl)ester, 0.3-0.8 part of diisononyl phthalate, and 0.3-0.6 part of a photosensitizer. Through reasonable blending of the above formula, the prepared degradable material has good wear resistance and long service life, and is degraded rapidly when discarded. Part of degraded product can be recovered, and the residual product is environment-friendly. Thus, the material is an environment-friendly degradable material. In addition, a preparation method of the material is simple, is easy for industrial production, and is worthy of promotion.

The invention discloses a transmission structure, a transmission connection mechanism and an air compressor, and relates to the technical field of mechanical transmission. The transmission structure comprises a rotating shaft and a transmission body; one end of the rotating shaft is provided with a limiting track; the other end of the rotating shaft is used for being connected with a driving mechanism; one end of the transmission body is movably matched with the limiting track, so that the transmission body reciprocates along the axis of the rotating shaft under the limiting of the limiting track while the rotating shaft is enabled to rotate; and the other end of the transmission body is used for being connected with equipment needing to do linear reciprocating work. The driving mechanism drives the rotating shaft to rotate; and when the rotating shaft rotates, the transmission body reciprocates along the axis of the rotating shaft under the limitation of the limiting track, so that the equipment connected with the transmission body does work linearly in a reciprocating manner; and therefore, reduction of deflection force, reduction of power loss and improvement of transmission efficiency are facilitated.

The invention relates to a novel imported port tractor gearbox wiring harness, and a preparation method thereof. The wiring harness comprises first connectors (1), heat-shrinkable tubes (2), wiring harness woven yarns (3), and a wire, wherein the first connectors (1) are connected to the two ends of the wire, so that a complete circuit is formed; the outside of the wire is circumferentially wrapped by the woven yarns (3); and the heat-shrinkable tubes (2) are arranged at the joints between the two ends of the wire and the first connectors. The imported wiring harness woven yarns are used for weaving of the wiring harness and are thermoplastic elastomer (TPE) coated yarns; compared with ordinary vinyl coating, thermoplastic coating can bear higher temperatures and is less susceptible to solvents; and the woven yarns achieve excellent moisture-resistant and weather-resistance performances, extremely high abrasion resistance and flexing fatigue resistance, high chemical substance and oil resistances, and extremely high stability at low temperatures.

The invention belongs to the field of catalysts and in particular relates to a catalyst for preparing propylene by propane dehydrogenation and a preparation method of the catalyst. The catalyst is prepared by taking an Al modified SBA-15-SAPO-34 eutectic molecular sieve as a catalyst carrier which loads an active metal Pt and an auxiliary agent Sn. The SAPO-34 molecular sieve provides an acid siteof a reaction and promotes the selectivity of propylene by a duct shape selecting effect. SBA-15 is a mesoporous molecular sieve and is eutectic to the SAPO-34 to provide a mesoporous mass transfer channel, so that a large amount of reaction raw materials are quickly diffused to catalytic active sites to react. Meanwhile, the acidity of the SBA-15 molecular sieve is adjusted by means of a small amount of Al. The catalyst has relatively high catalytic activity and catalytic selectivity to propane dehydrogenation to prepare propylene. The propane conversion ratio can reach 39% and the propyleneselectivity can reach 99%. The catalyst is excellent in carbon deposition resistance and long in service life and has a wide application prospect.

A fuel meter communication handling built on a major node of a shared channel forming master-slave typological network structure, features in the connection and exchange of data starting form the node fuel meter based on preset conditions and accumulator as the main node, it can greatly reduce the occupation rate of the following node to the channel, reduces the communication waiting time and energy consumption, and improve the endurance of the battery from the node.

The invention relates to an emulsion paint composition with a special artistic effect, and a preparation method and an application thereof, and concretely discloses a composition comprising pearlescent pigment and glass beads as a pigment and filler. The composition concretely comprises, by weight, 3-30 parts of the pearlescent pigment, 20-25 parts of the glass beads, 10-40 parts of an emulsion, and optionally selected 10-60 parts of water. The invention also discloses the preparation method and the application of the composition. The composition has the advantages of easiness in construction, good dust resistance, long service life, excellent artistic effect after coating, and broad application prospect.

The invention discloses a construction method of an architectural structure gypsum board with paper surface hung ceiling. The construction method comprises the following steps of:1, installing a light steel keel; 2, installing a top facing gypsum board, namely, installing the top facing gypsum board on the installed light steel keel; reserving side interval joints between side walls on the periphery of the top facing gypsum board and a wall body; forming multiple transverse deformation joints on the top facing gypsum board, and distributing the multiple transverse deformation joints from front to back along the long direction of the top facing gypsum board; and dividing the light steel keel into multiple light steel keel frames by taking the multiple transverse deformation joints as boundaries, and disconnecting the two front and back adjacent light steel keel frames; and 3, constructing the side interval joints and the deformation joints, namely, closing in the transverse deformation joints by adopting first aluminium alloy end caps, and meanwhile closing in the side interval joints by adopting second aluminium alloy end caps. The construction method is simple in steps, reasonable in design, and simple and convenient in construction and operation, has high working efficiency and good construction effect and can be used for solving the problems of ugly appearance, easiness in occurrence of cracks and deformation and the like existing in the conventional gypsum plaster board.

The invention relates to a novel precise machining cutter bar. The novel precise machining cutter bar comprises a cutter bar body, a cutter blade mounting area and a hexagonal socket screw. The cutter blade mounting area is welded to one side of the cutter bar body through a special technique, and the hexagonal socket screw is mounted inside the cutter blade mounting area. The novel precise machining cutter bar is good in wearing resistance, long in service life and moderate in cost and can reduce the production cost of enterprises.

The embodiments of the invention provide an orbit correction method and system of a space laser interference gravitational wave detector. The orbit correction method comprises the steps: nominal orbitelements and actual orbit elements of the space laser interference gravitational wave detector are obtained, and the average orbit element deviation value of the space laser interference gravitational wave detector is calculated; the nominal orbit elements of the space laser interference gravitational wave detector and perturbation magnitude information of the space laser interference gravitational wave detector are obtained, and an average orbit element perturbation equation of the space laser interference gravitational wave detector is calculated; and according to the geometrical relationship between the virtual formation configuration envelope radius and orbit configuration stability indexes of the space laser interference gravitational wave detector, by combining with the average orbit element perturbation equation, the expected value of the average orbit element deviation value of the space laser interference gravitational wave detector is obtained, and then the average orbit element correction of the space laser interference gravitational wave detector is calculated. According to the orbit correction method, fuel consumption can be reduced, and the mission life is prolonged.

The invention discloses a prefabricated and assembled composite vibration isolation barrier. A U-shaped cavity is defined in each U-shaped prefabricated concrete groove body, lifting rings are fixed to the top ends of side plates of the U-shaped prefabricated concrete groove bodies, meanwhile, the multiple U-shaped prefabricated concrete groove bodies are distributed along the same straight line, the opening ends of the side ends of every two adjacent U-shaped prefabricated concrete groove bodies are in butt joint such that the multiple U-shaped cavities are in communication, meanwhile, every two adjacent U-shaped precast concrete groove bodies can be detachably connected, then cast-in-place EPS light soil slurry is poured into the U-shaped cavities, and the EPS light soil slurry forms an EPS filling body after being solidified. The invention discloses a prefabricated and assembled composite vibration isolation barrier and a construction method thereof, which not only can effectively reduce vibration caused by rail transit, but also can guarantee the stability of an excavation section foundation, so that the service life of the prefabricated assembled composite vibration isolation barrier is prolonged, and the later maintenance frequency and cost are reduced.

The invention relates to an arm folding assembly and an unmanned aerial vehicle, which relates to the technical field of the unmanned aerial vehicle. The arm folding assembly comprises a connecting member, a fixing sleeve, an arm receiving cylinder and a limit stopper. The connector comprises a connector body, two flanges extend to the same side at one end of the connector body and are arranged inparallel, and a plurality of anti-slip projections are arranged at the other end of the two flanges away from the connector body. The connector body is movably connected to the outer wall surface ofthe fixing sleeve. One end of the arm receiving cylinder is fixedly sleeved in the fixing sleeve. The limiting stopper comprises a bottom plate and two side plates extending upward from two sides of the bottom plate, and the other end of the arm receiving cylinder is movably connected between the two sides plates, one side of the two sides plates facing the arm receiving cylinder is formed with afirst notch, and one side of the two sides plates opposite to the first notch is formed with a second notch. The arm folding assembly solves the problem that the unmanned aerial vehicle occupies largespace and is inconvenient to store in the prior art.

The invention belongs to the field of floor board processing, and in particular relates to a glazed floor board processing technology which can reinforce performance of a floor board and endow the floor board with glazed senses. The glaze floor board processing technology comprises the following steps of: preparing a board blank of a floor board; painting elastic priming paint, abrasion-resistant priming paint and hardening priming paint on the board blank, obtained from the first step, of the floor board to obtain a board blank I of the floor board; and painting glaze paint on the prepared board blank I, obtained from the second step, of the floor board to obtain a glazed floor board, wherein the glaze paint comprises the components including neoprene, red lead, toluene, fumed silica, ethyl acetate, sulphur, composite resin, plasticizer, calcium carbonate, carbonic acid, boric acid, zirconium oxide, aluminum powder, zinc oxide, curing agent, titanium white, rare earth, light magnesium oxide and magnesium carbonate. The adhesive force of the glaze paint prepared by the invention to common woodware can reach level 1; and the surface of the prepared floor board is of a ceramic glaze shape, the number of abrasion resistance turns of the floor board reaches 10,000 above, and the weather resistance of the floor board is improved greatly.