42results about How to "Little change in volume" patented technology

The invention provides a volute fan combined structure which mainly solve the problem how to reduce influences of volutes of two volute fans at two ends on air outflow of a middle volute fan in an air supply device provided with the three volute fans. The structure comprises an installation plate and at least two adjacent volute fans installed on the installation plate. One of the two adjacent volute fans is provided with a middle oblique air outlet located between the two adjacent volute fans, and the middle oblique air outlet obliquely extends in the direction away from a volute of the volute fan provided with middle oblique air outlet from back to front. The second volute fan, the first volute fan and the third volute fan are arranged on the installation plate in a staggered mode so that an air outlet of the second volute fan, the first volute fan and the second volute fan can be staggered, and interference is reduced. The invention further aims at providing a vertical air conditioner.

The invention belongs to the technical field of batteries, and particularly relates to a preparation method of a porous tin-carbon composite negative material, a composite material prepared through the method and a corresponding battery. The preparation method comprises the following steps of: firstly loading tin oxide, a carbon source and carbonate into a ball-milling tank according to the stoichiometric ratio, and carrying out ball-milling mixing to obtain a precursor; then placing the precursor into a flowing inert atmosphere, and calcining in a tube furnace; finally washing and drying an obtained calcined product to obtain the porous tin-carbon composite negative material. The porous tin-carbon composite negative material obtained through the method disclosed by the invention has the advantages of high capacity, excellent electrochemical property, low cost, simple production process and easiness for operation.

The invention discloses a heat-radiating substrate for an alternating current LED light source, which comprises a bottom layer, an insulating layer which is arranged on the bottom layer and can bear mechanical and thermal stress, a conductive layer which is arranged on the insulating layer and distributed with a conductive circuit and an electrode pad, and the LED light source embedded in a fixedslot of the heat-radiating substrate. The heat-radiating substrate is characterized in that the bottom layer is a graphite layer with size stability and heat radiation, or when the bottom layer is made of the conventional thermal conductive base materials, the graphite layer is embedded in the bottom layer which is positioned under a heat sink of the LED light source, the heat sink of the LED light source penetrates the bottom of the fixed slot and is in contact with the surface of the graphite layer, and the periphery of the heat sink is bonded with insulating media of the insulating layer, thereby constituting the heat-radiating substrate with the three-layer structure. The heat-radiating substrate can effectively solve the thermal conductive performance, the electrical insulating performance and the mechanical processing performance of a printed circuit board, thereby being widely applied in heat transfer media of electronic devices and improving the working stability.

The invention discloses a cooling fin suitable for a high-power LED lamp heat radiator. The cooling fin comprises a plurality of main cooling fin bodies arranged on a heat radiator body, and a plurality of branch cooling fin bodies are evenly arranged on each main cooling fin body. The transverse branch cooling fin bodies and the longitudinal branch cooling fin bodies are adopted by the cooling fin, the transverse branch cooling fin bodies are distributed perpendicular to the two sides of the cooling fin, and the longitudinal branch cooling fin bodies are arranged at the outer end of the cooling fin. On the premise that the size of the heat radiator is not greatly changed, the cooling area of the heat radiator is increased as far as possible, each cooling fin body can achieve the best cooling effect, when the cooling fin is applied to the high-power LED lamp, the temperature of the heat radiator is greatly lowered, and meanwhile the junction temperature of the lamp is lowered.

The invention relates to a foamed brick and a processing method thereof. The foamed brick is prepared from the following raw materials in parts by weight: 20-30 parts of fine stone sand, 10-20 parts of coal ash, 20-30 parts of 42.5-grade rapid hardening portland cement, 15-20 parts of quick lime, 10-15 parts of general coal ash ceramisite, 6-10 parts of sodium silicate, 1-3 parts of a concentrated high foam agent, 2-5 parts of calcium chloride, 5-8 parts of reinforcing glass fiber silks, 2-3 parts of an organic silicone water repellent, 0.2-0.3 part of vermiculite, 0.6-0.8 part of graphite and a proper amount of water. The processing method comprises the following steps: (1) mixing the materials and stirring to form mortar; (2) performing injection molding. The foamed brick is low in cost, very good in heat insulation property, sound insulation property and fire prevention property, and relatively high in strength.

The invention relates to a repair welding method for a magnesium alloy casting oil way. A graphite material is used as a repair welding base plate for carrying out repair welding on defects of a casting, so that the purpose of repair is achieved. The characteristics of softness, easy removal, high temperature resistance and thermal shock resistance of graphite are utilized, in the using process, the repair welding base plate can bear acute changes of temperature so that damage and cracks can be prevented, and has various properties needed by an argon arc welding base plate, it is possible to repair the defects of the magnesium alloy casting oil way part, and the purpose of saving the casting is achieved.

The embodiment of the invention provides a rowing machine and treadmill combined type multi-functional body builder. The body builder comprises a base, a running mechanism is arranged on the base, and a rowing mechanism is further arranged on the base. The running mechanism comprises a running supporting mechanism, a rotating roller and a running belt, the running supporting mechanism is connected to the base, the rotating roller is rotatably connected to the supporting mechanism, and the rotating roller is sleeved with the running belt. A sliding rail and a sliding seat are arranged on the base, the sliding seat is arranged above the running belt, and the sliding seat moves forwards and backwards along the sliding rail. The body builder further comprises a holding component, a traction component and a damping component fixed to the base, one end of the traction component is connected with the holding component, and the other end of the traction component is connected with the damping component. According to the embodiment of the invention, two kinds of fitness apparatuses are integrated on one piece of fitness equipment, so that the requirement of one machine for multiple functions is met, and meanwhile, the occupied area is greatly saved.

The invention discloses a padding type investment casting wax based on lipophilic micro graphite and a preparation method of the padding type investment casting wax. The padding type investment casting wax based on the lipophilic micro graphite comprises basic components including, by mass percent, 40%-60% of paraffin, 6%-10% of rosin or rosin resin, 3%-10% of PE wax, 25%-35% of petroleum resin and 5%-15% of the lipophilic micro graphite and further comprises pigment accounting for 0wt%-0.5wt% of the basic components. The invention further discloses the preparation method of the padding type investment casting wax based on the lipophilic micro graphite. The padding type investment casting wax is moderate in softening point, relatively small in needle penetration and linear shrinkage rate,relatively large in bending strength, small in ash content and capable of meeting the requirements for high size precision and high surface quality of a precise cast well and meeting the requirement of actual production.

The invention relates to a fine separation method and system of crude Fischer-Tropsch wax, and belongs to the technical field of Fischer-Tropsch wax cutting equipment. The raw materials of the crude Fischer-Tropsch wax enter a first-stage separation system and are separated in a thin film evaporator to obtain a No.1 light phase product and a No.1 heavy phase product; the No.1 heavy phase product enters a second-stage separation system and is separated in a first-stage short-path distiller to obtain a No.2 light phase product and a No.2 heavy phase product; the No.2 heavy phase product enters athird-stage separation system and is separated in a second-stage short-path distiller to obtain a No.3 light phase product and a No.3 heavy phase product; and the No.3 heavy phase product enters a fourth-stage separation system and is separated in a third-stage short-path distiller to obtain a No.4 light phase product and a No.4 heavy phase produce. The separation method and the separation systemcan realize fine separation of the crude Fischer-Tropsch wax, have reasonable system design, can obtain Fischer-Tropsch wax with different melting point brands, meet different market requirements, have a simple technical process and realize industrial production.

The invention relates to a combined type heat-insulating baffle which is applied to directional solidification equipment and is used for increasing monocrystal solidification temperature gradient. The combined type heat-insulating baffle comprises graphite rings and a flexible graphite felt, wherein the graphite rings and the flexible graphite felt are combined into an annular body, the inner diameter of which is more than the outer diameter of a shell mould to be cast; and the graphite rings are divided into two layers, the upper-layer graphite ring is directly placed on a water cooling sleeve in a directional solidification furnace, the flexible graphite felt is filled between the two layers of graphite ring, a height difference exists between the height of the inner diameter of the upper-layer graphite ring and the height of the outer diameter of the upper-layer graphite ring, and the height from the inner diameter to the outer diameter is increased in a smooth transition manner. The combined type graphite high-temperature heat-insulating baffle disclosed by the invention is convenient to manufacture by just clipping the flexible graphite felt according to dimensions and placing the clipped flexible graphite felt on the graphite rings on the water cooling sleeve as well as directly placing the second-layer graphite ring on the graphite felt, no bolts and nuts are needed for fixation, the placement is convenient and the price cost is low. Compared with the prior art in which a hard graphite felt is used as the heat-insulating baffle, the combined type heat-insulating baffle has the advantage that the temperature gradient is increased by almost 50%.

The invention discloses a 3D printing material and a preparation method. The 3D printing material is characterized by comprising the following raw materials in percentage by mass: 1% to 5% of photosensitizer, 1.8% of phthalidyl phosphorus oxide, 1.5% of benzil, 3.5% to 8% of reactive diluent, 0.1% to 0.5% of colored powder, 0.1% to 0.7% of surface modifier, 1% to 1.5% of ceramic granule powder, 2.5% to 4% of nano antibacterial agent and the balance of epoxy resin. The 3D printing material is synthesized through subjecting multielement aliphatic amine and acrylate containing multielement doublebonds to a Michael addition reaction to synthesize hyperbranched photosensitive resin, then, taking the new synthesized epoxy resin as a base material, taking the phthalidyl phosphorus oxide and thebenzil as photoinitiators, and then, adding the reactive diluent, the colored powder, the surface modifier, the ceramic granule powder and the nano antibacterial agent. The 3D printing material disclosed by the invention is high in curing rate, high in adhesive power, free of delaminating phenomenon during experiment and low in volume change before and after curing, the mechanical properties meetthe requirements of 3D printing, and the 3D printing material has a certain industrialized application value.

The invention relates to a fuse cutter and a novel drop fuse, the novel drop fuse comprises a circuit breaker unit, Fuse, fuse cutter, includes a fuse cutter base, the substrate is provided with a through hole through which the fuse can pass, characterized in that an air cylinder is arranged on the left side of the base body, a piston, a cutting knife is arranged at the end of the piston, a cavitywhich can be moved by the cutting knife is arranged in the base body, a gas generator is also arranged at the bottom of the cylinder, the cutting knife and the base body are made of insulating material, and the gas generator is started by a starting unit. The invention has the advantages of simple structure, reliable operation and instantaneous circuit breakage.

The invention relates to a scraper seal for a conical crusher with self-sealing self-lubricating function, material quality of the scraper seal is cast iron, the content range of the components and cast iron of the cast iron material is that iron 91.2-92.6%, graphite 4.4-4.8% and silicon 3-4%. The scraper seal has the advantages that first, the adding of graphite leads a sealing ring which is casted not only have the function of lubricating and self-sealing, but also has the function of resisting acid, resisting alkali, resisting the corrosion of organic solvent, resisting wear, resisting high temperature and resisting cracks, second, the adding of silicon leads sealing ring which is casted to have double characters of metal and ceramic element, and the integral property of the casted sealing ring is improved.

The invention discloses a silica sol combined magnesium tundish prefabricated member and a manufacturing method thereof. The manufacturing method for the silica sol combined magnesium tundish prefabricated member comprises seven working procedures of raw material preparation, material matching, material mixing, forming, maintaining, baking and packaging. The manufacturing method has the advantages that as the SiO2 in the binding agent silica sol is uniform distributed in the prefabricated member to form a dense and uniform structure, most of all, the tundish prefabricated member has very strong steel slag corrosion resistance performance and molten steel washing resistance performance in the using process as well as excellent thermal shock resistance performance and can meet the sequential casting requirement of more furnace times.

The invention discloses a high-pressure-resistant visual window suitable for optical measurement of an oil sprayer with a wide spraying hole included angle. A sleeve boss surface of the visual window is matched with a constant volume bomb body, the middle of the sleeve boss surface is sealed by an additional O-shaped ring, an inner step surface of a sleeve is matched with a quartz glass window, and the axis of the quartz glass window is not perpendicular to the axis of the constant volume bomb body; a centering O-shaped ring is used for radially positioning the quartz glass window, a bypass hole is formed in the sleeve, the whole side face of the quartz glass window is communicated with a cavity of the constant volume bomb body through the bypass hole formed in the sleeve and used for balancing air pressure on the bottom face and the side face of quartz glass, and the quartz glass window is locked between the sleeve and the end cover through a plurality of short bolts. The visual window is advantaged in that technical problems that when a PLIF method is used for studying the spray combustion characteristics of the porous oil sprayer, spray of the wide-spray-hole-included-angle oil sprayer is difficult to measure due to the fact that the window area of a constant-volume bomb is limited, and the window strength is difficult to guarantee due to the fact that the window area is too large are solved, the service life is prolonged, and the safety coefficient is increased.

The invention discloses a corrugated honeycomb composite cardboard, comprising a honeycomb cardboard surface layer and a corrugated cardboard bottom layer, wherein a buffer layer is disposed between the two layers. The honeycomb cardboard comprises the following components by weight: 30-50 parts of hardwood pulp, 0.8-2 parts of bamboo charcoal powder, 4-10 parts of straw, 1-2 parts of epoxy resin,0.1-0.5 parts of a toughening agent, 0.4-0.8 part of a sodium hydroxide solution, 0.5-0.8 part of carboxymethyl cellulose, 0.5-1 part of a preservative and 0.01-0.02 part of ammonium ferrous sulfate.The corrugated honeycomb composite cardboard perfectly combines the advantages of the honeycomb cardboard and the corrugated cardboard, and is greatly improved in shock-absorbing buffer performance at the same time; and the corrugated honeycomb composite cardboard is prepared from a composite plant fiber material containing the hardwood pulp, the bamboo charcoal powder and the straw, has low hygroscopic moisture content, small size change and stable product performance on the premise of low density and good cushioning performance, and totally meets requirements on the cushioning materials forpackaging.

The invention discloses a foldable electric scooter. The foldable electric scooter comprises a front rod and a footboard. The front rod comprises an installation part connected with the footboard anda folding part located above the installation part. A connecting rod is obliquely arranged at the front end of the footboard and is connected with the middle of the installation part. A movable movingblock is arranged at the bottom of the folding part and is clamped into the installation part. A lateral rod is arranged at the folding part and is in rotating shaft connection with the bottom of theinstallation part. A clamping block is arranged on the surface of the connecting rod. The folding part can rotate and press downwards around a rotating shaft to be parallel to the footboard, and therefore the moving block is in clamping connection with the clamping block. New folding positions and folding structure are provided. After folding, the scooter is small in size and convenient to carry,and stability of the whole scooter is high.

The invention discloses a nanometer plant fiber cushion packaging material. The nanometer plant fiber cushion packaging material is composed of 32 to 50 parts of nanometer modified plant fibers, 6 to9 parts of thermoplastic starch and the like. A preparation method for the nanometer modified plant fibers comprises the following steps: drying plants, then crushing and grinding the dried plants, and soaking the ground plants in a sodium hydroxide solution for 5 to 8 h; adding a modifier for modification; carrying out centrifugation and dehydration; and carrying out nanometer grinding. Accordingto the invention, the nanometer modified plant fibers are employed, so a foaming ratio is increased by nearly 10 to 15 times; the foamed cushion packaging material has an independent air chamber structure, so the shockproofness and anti-compression performance of the material are guaranteed; and the nanometer plant fiber cushion packaging material has a density of 0.10 to 0.12 g/cm<3>, a volume change rate of -5 to -7%, 24-h hygroscopic moisture content of 0.09-0.12 g and impact strength of 25-35 KJ/m<2>, further has lower density, good cushioning performance, low hygroscopic moisture content, small volume change and stable product performance, and fully meets requirements on cushioning materials for packaging.

The invention discloses a desiccant preparation method and a desiccant. The desiccant is mainly composed of super absorbent resin, magnesium chloride and/or a stabilizer, and the desiccant comprises the following components in parts by weight: 10-90 parts of super absorbent resin, 5-90 parts of anhydrous magnesium chloride with high magnesium chloride content and/or magnesium chloride with N crystal water and/or calcium chloride, and/or 0.1-5.0 parts of a stabilizer. The desiccant can be obtained by stirring and mixing. The prepared desiccant is excellent in moisture absorption capability, is a colloid which is not easy to flow after absorbing moisture, is small in volume increase change, and is environment-friendly, non-toxic, good in stability and convenient to prepare. The desiccant is very good in universality and is particularly suitable being placed an occasion with a limited desiccant space and needing high moisture absorption capacity to prevent a camera lens from fogging in the security industry.

The invention provides a vesicle centrifugal protective agent, application of the protective agent and a method for centrifugally extracting vesicles, and belongs to the technical field of biology. The vesicle centrifugal protective agent comprises glycerol and sodium carboxymethyl cellulose. On the basis of differential centrifugation, the glycerin and the sodium carboxymethyl cellulose are adopted as the centrifugal protective agent, the glycerin can permeate into cells to increase the solute concentration of an intracellular solution, and the sodium carboxymethyl cellulose is located outside the cells to increase the solute concentration of an extracellular solution, so that the osmotic pressure balance inside and outside the vesicles is achieved, the extrusion deformation resistance is improved, the vesicles are protected from being damaged in the ultra-high-speed centrifugation process to the maximum extent, and the yield of the vesicles is improved. Moreover, the addition of the sodium carboxymethyl cellulose can change the surface charge of the vesicles, destroy the electrostatic repulsion of the vesicles, cause the aggregation and precipitation of the adjacent vesicles, improve the precipitation speed of the vesicles, shorten the time required for extraction and further improve the yield and separation efficiency of the vesicles.

The invention provides an air-cooled oil-immersed power transformer, which comprises a transformer body, wherein the lower end of the transformer body is provided with an installation support, the side surface of the transformer body is provided with a plurality of radiators, the radiators are externally provided with a fan array, and the fan array covers all or part of the end faces of the radiators. The silent axial flow fans are small in size and installed on four sides of a transformer after forming the fan array, the transformer is small in size change, and the heat exchange is carried out in a large-area and uniform manner, so that the operation temperature of the transformer is effectively reduced, the overload capacity of the transformer is improved, the service life of the transformer is prolonged, and the like.

The invention relates to an air type fish cleavage generating device and a culturing incubation method in a cleavage period. Cultured fishes incubated by drug stimulation and temperature compensation shock method have many problems that the incubation rate is low; the deformity is prone to occur; the pressure is increased; the equipment is too heavy; the operation is complex; the cleavage generating degree of fertilized eggs is difficult to control and the mortality rate is high. The device comprises a columnar cleavage chamber (2); a water pump (16) is arranged at the middle position of the bottom surface of the columnar cleavage chamber; the upper end of the water pump is provided with an upper water pipe support (3); the lower end of the upper water pipe support is provided with a water filtering partition plate (15) in a sleeved mode; the upper end of the upper water pipe support is provided with a filtering layer (13) in a sleeved mode; the fertilized eggs (14) are arranged at the space among the columnar cleavage chamber, the water filtering partition plate and the filtering layer; the top end of the upper water pipe support is provided with a water spraying pipe (12) in a sleeved mode; a positioning seal cover (4) is placed above the columnar cleavage chamber; a ring of expansion rubber seal ring (5) is arranged at the side surface of outer portion of the positioning seal cover. The invention is applied to the air type fish cleavage generating device and the culturing incubation method in the cleavage period.