153results about How to "Strong cost performance" patented technology

The invention discloses a plurality of united observer based fault diagnosis and fault-tolerant control device and a method and belongs to the field of aerospace. The plurality of united observer based fault diagnosis and fault-tolerant control device comprises following modules of a fault injection module, a fault diagnosis module, a real time monitoring module and a hardware control module. According to the method, the problem that traditional observer based fault diagnosis methods are limited by conditions is mainly solved, the operation is simple, the implementability is high, and the method can be used for diagnosing faults of actuating mechanisms of a four rotor wing helicopter and verifying feasibility of state monitoring.

The invention relates to the plastic pipe field, in particular to a two-layer co-extruding plastic drainage pipe used outdoors. The drainage pipe contains an inner layer and an anti-aging outer layer, wherein the inner layer comprises the following components in parts by weight: 90-110 parts of polyvinyl chloride resin, 3.5-4.8 parts of composite stabilizer, 3-8 parts of impact modifier, 0.2-0.5 part of stearic acid, 0.2-0.6 part of calcium stearate, 0.3-0.6 part of AC foaming agent, 4-8 parts of foaming regulator ZB530, 5-40 parts of calcium carbonate, 0.4-1.0 part of polyethylene (PE) wax and 0.3-0.8 part of lead stearate. The outer layer of the drainage pipe is the anti-aging layer, thus the aging resistant problem can be solved. The inner layer adopts the foaming technology, thus the overall weight of the drainage pipe can be reduced, the impact resistance of the pipe can be increased, the pipe has the effect of sound insulation and the cost of the drainage pipe can be reduced. In addition, the invention also discloses a preparation method of the two-layer co-extruding plastic drainage pipe.

The invention discloses a single-component lightweight sound-insulating heat-preserving mortar material. The material is prepared from the following raw materials by weight: 350 to 700 parts of Portland cement, 500 to 1000 parts of lightweight porous slag, 6 to 12 parts of redispersible latex powder, 3 to 6 parts of cellulose ether, 20 to 40 parts of foam glass particle, 10 to 20 parts of a sound-insulating filling material, 20 to 40 parts of shale pottery and 1 to 2 parts of reinforced fiber. The single-component lightweight sound-insulating heat-preserving mortar material provided by the invention has scientifically and reasonably proportioned components, is extensively applicable to handling of walls, household floors and the like having requirements on sound insulation and heat preservation during building and brushing of the walls, casting of the household floors, etc., and has the advantages of sound insulation, heat preservation, fire prevention, water resistance, anti-freezing performance, good adhesion, no occurrence of cracking and hollowing, etc. The construction method for the material is reasonably designed, can mold a sound-insulating and heat-preserving system in a building wall or household floor in one shot and has the advantages of convenient construction, high efficiency, low cost, high quality, etc.

The invention provides a pipeline intersecting line welding system, and belongs to the technical field of pipeline welding. The pipeline intersecting line welding system is characterized by comprisinga parallel robot (A1), an electric sliding rail assembly (B1) and a door-type bracket, the electric sliding rail assembly (B1) is arranged on the upper part of the door-type bracket, the upper part of the parallel robot (A1) is installed on the door-type bracket through the electric sliding rail assembly (B1), and a welding gun (5) is installed at the lower part output end of the parallel robot (A1); the parallel robot (A1) comprises a fixed platform (1), motion branched chains (2), center telescopic branched chains (3) and a motion working table (4), and the multiple groups of motion branched chains (2) and the center telescopic branched chains (3) are arranged between the fixed platform (1) and the motion working table (4). According to the pipeline intersecting line welding system, themotion branched chains and the center telescopic branched chains are adopted, and the motion effect of driving the welding gun to integrally move three times and rotate once is achieved. The workingspace of a mechanism is increased, and meanwhile, the problems of self locking and redundant constraint caused by asymmetric branched chains existing in a parallel mechanism are solved.

The invention relates to a method for producing a temperature-resisting, anti-seismic and antibacterial compound polyethylene water supply pipe, which can be used for solving the problems of the prior art that the pipe shaping process is difficult, the service life is short, the anti-seismic property is poor, the pipe is easily damaged and the antibacterial property is inferior. The method comprises the following steps: respectively extruding and heating a polyolefin PE (polyethylene) outer layer and a polyolefin PERT (polyethylene raised temperature) inner layer, and then extruding a two-layer or multi-layer coextruded compound pipe from a same extruding port, wherein the compound pipe has tightly combined adjacent layers and at least contains the polyolefin PE outer layer and the polyolefin PERT inner layer; heating the polyolefin PE outer layer and the polyolefin PERT inner layer in sections in the cylinder area and a mold head area of an extruder; shaping the combined compound pipe in vacuum; placing the compound pipe in a water tank for cooling; printing the pipe; dragging the pipe; and cutting the pipe according to the fixed size. The compound polyethylene water supply pipe provided by the using the method has non toxic or side effect, is temperature-resisting and antibacterial, is strong in acclimation, has high cost performance, is simply processed, is conveniently, safely and reliably used, has strong strength and excellent toughness, is strong in anti-seismic property, is difficult to age, break and soak, and has low comprehensive cost.

The invention discloses a flower fertilizer, which is prepared by fermenting waste materials such as peel, vegetable leaves, bones, leftovers, tea leaf slag and medicament slag. The invention is characterized in that: the waste materials such as peel, vegetable leaves, bones, leftovers, tea leaf slag and medicament slag are filled in a container; after a certain amount of water and leaven is filled into the container, the container is sealed for 2 to 3 days; when the waste materials are fully fermented, thoroughly decomposed and turned into black liquid, a plurality parts of hydrogen peroxide are added for absorbing odor; and the slag are removed by filtering, and the filtrate is diluted by 100 folds by water, and the diluted product is filled into small bags. The flower fertilizer of the invention is prepared by taking waste materials as the main raw materials, has the advantages of low cost and convenience for making, has little peculiar smell and can contribute to environment protection after being promoted widely.

The invention discloses an inner glue and rubber mixed material for high-performance steel wire-wound hydraulic rubber tubes and a preparation method thereof, belonging to an inner glue and rubber mixed material and solving the technical problem of poor pulse performance of the finished products of hydraulic rubber tubes. The inner glue and rubber mixed material is prepared from the following raw materials in parts by weight: 95-115 parts by weight of butadiene-acrylonitrile rubber, 6-10 parts by weight of active agent, 4-6 parts by weight of resin, 1-2 parts by weight of anti-aging agent, 40-60 parts by weight of high-dispersion and low-structure carbon black, 6-8 parts by weight of chemical plasticizer and 3.5-3.9 parts by weight of vulcanizing accelerator. The preparation method comprises the following steps: (1) primary refining: refining the butadiene-acrylonitrile rubber for 5-6 minutes at 95 -100 DEG C in an airtight rubber refining machine; (2) mixed refining: adding the active agent, the resin, the anti-aging agent, the high-dispersion and low-structure carbon black and the chemical plasticizer for mixed refining of 9-11 minutes at 100 -110 DEG C, discharging the mixed rubber and placing the mixed rubber on a refining machine to be rolled for 2-3 times and cooling the mixed rubber to 45 -55 DEG C; and (3) vulcanization: adding the vulcanizing accelerator, carrying out three-time packaging, two-time rolling and one-time thinning on an open type rubber refining machine, discharging sheets after achieving the roll distance of 0.4-0.6 mm, extruding the placed sheets, and vulcanizing the sheets for 35-45 minutes at 148-152 DEG C.

The invention relates to a growth method for controlling the diameter of a rod-like sapphire crystal based on a protective atmosphere. An airflow introduction passage is distributed around the upper end of a mold within a thermal field when a crystal is grown, gas flowing in from the airflow introduction passage performs convection heat dissipation on the upper end of the mold, and the heat dissipation strength of the mold is controlled by adjusting the flow rate of the gas so as to adjust the thickness of a liquid film at the solid-liquid interface of the crystal and change the size and shape of a sapphire product; the purpose of changing the diameter of the crystal is fulfilled by controlling the flow rate of the gas scouring the surface of the mold based on the size and shape of the sapphire; when the diameter of the grown crystal needs to be increased, the velocity of the gas flowing into the airflow passage can be increased; when the diameter of the grown crystal needs to be reduced, the velocity of the gas flowing into the airflow passage can be reduced. The growth method disclosed by the invention has the advantages that the shape of the grown crystal is controlled by adopting the method of cooling the mold with gas flow, so that the influence of external disturbance on the shape of the crystal can be overcome in the growth process; in addition, the growth method can also be used for growing a crystal in a specific shape.

The invention discloses a preparation method of an absorbent for laser transmission welding of light-transmitting plastic. Black light-absorbing plastic particles and a plastic dissolving agent corresponding to the black light-absorbing plastic particles are included; the plastic dissolving agent is used for dissolving the black light-absorbing plastic particles, the mixture is stirred to form sticky plastic dissolving liquid, namely the absorbent, and finally the prepared absorbent is sealed and stored in a dissolving container; the volume ratio of the plastic dissolving agent to the black light-absorbing plastic particles is 1:(0.8-1.2); the black light-absorbing plastic particles contain substances capable of absorbing lasers. The absorbent which is high in welding quality, high in universality, easy to obtain and high in cost performance is provided for laser welding of the light-transmitting+light-transmitting plastic, and the problems concerning laser welding of the light-transmitting+light-transmitting plastic can be solved in a high-quality and high-efficiency mode. The absorbent has the advantages of being high in welding quality, high in universality, easy to obtain, high in cost performance and high in adaptability.

The invention discloses a prefabricated short slab floating track bed and a construction method and belongs to a railway track bed. The prefabricated short slab floating track bed comprises floating slabs, heightening gaskets, shear hinges and elastic vibration isolators, wherein the elastic vibration isolators are arranged in preset through holes of each floating slab, a support stop block or a coupling sleeve provided with a support stop block is arranged on the inner wall of each preset through hole, each floating slab is supported on the elastic vibration isolators through the support stop blocks, an heightening gasket is arranged between each support stop block and the corresponding elastic vibration isolator, shear hinges are arranged between floating slabs, each floating slab is a prefabricated short slab with the length of 3-8 m, the elastic vibration isolators arranged at the two ends of each prefabricated short slab are respectively arranged on the inner sides of outermost buckles along the longitudinal direction of the steel rail, and the vertical rigidity of the elastic vibration isolators is at least 1.5 times the vertical rigidity of the elastic vibration isolators in other positions of each prefabricated shot slab. The prefabricated short slab floating track bed and the construction method realize the prefabricated production and hoisting construction of the floating slabs and guarantee the stability and safety of the floating track bed in the driving process by arranging the elastic vibration isolators with different vertical rigidities, and further, the construction speed is improved, the reduction of construction period is facilitated, the construction difficulty is reduced, and the production cost is saved.

The invention discloses a 690 Mpa-grade low-cost high-toughness bainitic steel plate and a production process thereof. The steel plate comprises the following chemical components of, by mass percentage, 0.03-0.09% of C, 0.10-0.30% of Si, 1.50-1.80% of Mn, 0.030-0.070% of Nb, less than or equal to 0.02% of Ti, 0.10-0.40% of Mo, 0.20-0.30% of Ni, less than or equal to 0.045% of Alt, less than or equal to 0.002% of Bt and the balance Fe and inevitable impurities; and the production process comprises the processes of smelting, continuous casting, heating, rolling and heat treatment. The steel plate has the characteristics of low welding crack sensitivity coefficient, low carbon content, low cost and the like, the problems that the carbon content and the carbon equivalent of the tempered steelare high, and the welding performance is poor are solved, and the steel plate can meet the requirements of steel in the fields of engineering machinery, heavy-load bridges, energy-saving vehicles, pipelines, ships, ocean platforms and the like in China.

The invention relates to a prefabricated RC column inflection-point aligned connection method. A prefabricated RC column inflection-point aligned connection device comprises an outer sleeve plate, anouter sleeve and a middle connecting plate; the aligned connection device is prefabricated on a lower column, and high-strength adhesives are poured into a grouting hole and a through hole of the middle connecting plate during assembly; then an upper column is aligned with the lower column to be installed, and an aligning threaded hole is adopted for correction; and a gap between the upper columnand the outer sleeve plate is filled with high-strength adhesives. According to the method, alignment is accurate and convenient, the construction speed is high, enough horizontal shearing force is achieved, and economical efficiency is high; and when the device is applied to the inflection-point position of the column, the effect is obvious, the engineering cost is not remarkably increased, the cost performance is high, and the method is suitable for being widely popularized in engineering.

The invention discloses a hybrid fiber reinforced strain hardening cement-based composite material and a preparation method thereof, The raw material composition of the composite material is as follows: Portland cement, water reducer, fly ash, sand, PVA fiber, steel fiber, calcium carbonate whisker and water, the mass proportion of the above raw materials is as follows: Portland cement 300+-5 Kg / m3, water reducer 6+-1 Kg / m3, fly ash 1200+-50 Kg / m3, sand 540+-20 Kg / m3, PVA fiber 18+-4 Kg / m3, steel fiber 45+-25 Kg / m3, calcium carbonate whisker 110+-40 Kg / m3, water 510+-5 Kg / m3. The hybrid fiber reinforced strain hardening cement-based composite material of the present invention has excellent tensile deformation ability, extremely strong bending deformation ability, obvious multi-slot cracking characteristics under uniaxial tension and bending load, high level compressive energy absorption ability, high cost-performance ratio, low cost, easy availability of raw materials and simple preparation process.

The invention discloses a mildew-resistant water-based paint for an interior wall and a preparation method thereof. The mildew-resistant water-based paint for the interior wall comprises 25-35 parts by weight of an acrylic emulsion complexed with silver ions, 5.0-7.5 parts by weight of an opaque polymer, 16-18 parts by weight of titanium dioxide, 3-5 parts by weight of diatomite, 7.5-10 parts by weight of ground calcium carbonate, 0.8-1 part by weight of a freezing-and-thawing-resistant stabilizer, 1-2 parts by weight of a film-forming aid, 0.5-0.8 part by weight of a dispersing agent, 0.3-0.5part by weight of a thickener, 0.1-0.2 part by weight of a wetting agent, 0.1-0.3 parts by weight of an antifoaming agent, 0.1-0.3 part by weight of a preservative, 0.5-0.8 part by weight of an anti-mold agent, 0.2-0.3 part weight of a leveling agent and 20-30 parts by weight of water. The mildew-resistant water-based paint of the invention has the advantages of friendliness to environment, highcovering power, strong adhesion, good leveling properties, excellent and long-lasting mildew resistance, good comprehensive performance, high cost performance, strong applicability, low gloss at a measurement angle of 85 degrees, etc., and can be widely used in food processing plants, pharmaceutical plants, underground garages, grain depots, breweries and other places.