45results about How to "Increased folding ratio" patented technology

The invention provides an annular truss-type large space foldable mechanism which is formed by connecting a plurality of identical 6R mechanism foldable units in an end-to-end mode and in an annular mode. The 6R mechanism foldable units can be symmetrical in the longitudinal direction and in the transverse direction. Each 6R mechanism foldable unit comprises two identical supporting rods and four identical chord members, wherein the two supporting rods are longitudinally arranged in parallel; the four chord members include two upper chord members and two lower chord members, the starting ends of the two upper chord members are connected to the upper ends of the two supporting rods through a revolute pair respectively, the tail ends of the two upper chord members are mutually connected through a revolute pair, the starting ends of the two lower chord members are connected to the lower ends of the supporting rods through a revolute pair respectively, the tail ends of the two lower chord members are mutually connected through a revolute pair, each chord member is movably connected with the adjacent supporting rod through a sliding block crank mechanism, sliding blocks are arranged on the supporting rods in a sleeved mode, one end of each crank is connected with the corresponding chord member through a revolute pair, the other end of each crank is connected with the corresponding sliding block through a revolute pair, and the length of the supporting rods is more than twice that of the chord members. The annular truss-type large space foldable mechanism has a high foldable ratio.

The invention provides a space deployable mechanism comprising multiple identical folding deployable units which are arranged symmetrically left and right. Each folding deployable unit comprises two identical vertical rods arranged longitudinally, two identical first chord members, two identical second chord members and two identical third chord members, wherein the starting ends of the two first chord members are connected to the upper ends of the two vertical rods through rotating pairs respectively, the tail ends of the two first chord members are mutually connected through a rotating pair to form a V-type rod, the middles of the two second chord members are mutually connected through a rotating pair to form a scissor form mechanism, the starting ends of the two second chord members are connected to the lower ends of the two vertical rods through rotating pairs respectively, the starting ends of the two third chord members are connected to the lower middle parts of the two vertical rods through rotating pairs respectively, and the tail ends of the two third chord members are connected to the tail ends of the two second chord members through rotating pairs respectively. The space deployable mechanism is good in deployable performance, high in rigidity and error containment and low in machining and manufacturing requirement.

A 9RR-12URU-3URU symmetrical extendable basic unit mechanism includes 10 face plates, 9 swing rods with equal lengths, 6 folded rods I, 6 folded rods II, 3 folded rods III, 33 revolute pairs (R) and 30 Hooke joints (U). Six of the face plates at the periphery in the upper layer are connected with the central face plate through the folded rods I and are connected with each other through the folded rods II. Three of the face plates in the lower layer are connected to each other through the folded rods III. Each of the folded rods is formed by connecting two connecting rods of equal lengths through one of the revolute pairs, and two ends of the folded rod are connected with the face plates through the Hooke joints. Each of the face plates in the lower layer is connected with the central face plate and two of the face plates at the periphery in the upper layer through three of the swing rods. Two ends of each swing rod are connected with the face plates through the revolute pairs. The central face plate and the face plates at the periphery in the upper layer are on the same spherical surface and form a regular hexagon with the face plates at the periphery as vertices. The mechanism is simple in structure, high in rigid, and easy for implementation of engineering manufacture. The mechanism can fold all face plates simultaneously and can adjust the folded face plate attitudes, and has a high folding ratio.

The invention discloses a dedicated fireproof insulation panel for a building external wall. The dedicated fireproof insulation panel comprises the following raw materials: cement, river sand, ferrous mill tailings, pebbles, rubbles, vitrified microsphere, oil shale, coal ash, coal gangue, silica fume, modified polystyrene granules, polyurethane particles, polycarbonate, neoprene latex, epoxy resin emulsion, water reducing agent, air entraining agent, carbon fiber, polypropylene fiber, mullite fiber, and water. The dedicated fireproof insulation panel for the building external wall provided by the invention is light in weight, low in heat conducting coefficient, good in insulation and heat-shielding performance and excellent in compressive property and fireproof performance.

The invention discloses a preparation method of composite cement with low clinker dosage and high flexural compression ratio. The preparation method is to mix three size ranges of powder particles and obtain the composite cement. The three size ranges of powder particles are as follows: 1) the grain size of particles is less than 8mu m, the particles are composed of high-activity supplementary cementing material with the grain size; 2) the grain size of particles is 8-24mu m, the particles are composed of cement clinker particles with the grain size; and 3) the grain size of particles is 24-80mu m, and the particles are composed of low-activity supplementary cementing material or inert filler. The volume percentages of the three size ranges of powder particles are 25-40%, 25-30% and 30-45% respectively. The clinker volume percentage of the composite cement is 25-30%, the 28-day compressive strength is up to 35-50MPa, the flexural strength is up to 10-12Mpa, the flexural compression ratio is 1/3-1/4; and the composite cement has low hydration heat and good anti-cracking capability and can be used in the civil construction/engineering with the demand on the anti-cracking capability.

The invention aims to provide a thermal insulation mortar using large amount of waste tire, comprising tire rubber, cement, emulsion powder, fiber and cellulose ether and the like; the main proportionof cement to emulsion powder to tire rubber is 1:0.2:0.6; the particle size of tire rubber particle is in the range of 0.1-5 mm; thus, high flexible thermal insulation mortar of rubber powder is doped; by researching and testing the performances of flexible mortar, the intensity of mortar can be reduced by rubber powder to improve compression strength of mortar, thereby increasing resistance to deformation of the thermal insulation mortar, and improving the anti-cracking performance of the thermal insulation mortar. The invention has the characteristics of fine chemical resistance, no water absorption, great toughness, fine anti-cracking performance and fine thermal insulation performance, and is used for preparing thermal insulation mortar, thereby not only showing thermal insulation andenergy saving of buildings, but also having fine environmental effect.

The invention discloses an anti-cracking anti-permeability concrete baffle special for a mountain slope. The anti-cracking anti-permeability concrete baffle comprises the following raw materials in parts by weight: 80-100 parts of cement, 250-400 parts of rubbles, 10-30 parts of quartz sand, 10-35 parts of cordierite, 2-8 parts of semi-hydrate phosphogypsum, 2-15 parts of calcined kieselguhr, 10-25 parts of modified steel fiber, 3-12 parts of basalt fiber, 1-10 parts of sisal hemp fiber, 2-15 parts of carbon fiber, 2-15 parts of nanometer silicon dioxide, 3-11 parts of nanometer calcium carbonate, 20-45 parts of coal ash, 20-35 parts of iron ore, 2-5 parts of styrene-acrylic emulsion, 1-5 parts of carboxyl butylbenzene emulsion, 1-5 parts of epoxy resin emulsion, 2-10 parts of polycarboxylate-type water reducer, 3-8 parts of an additive and 20-35 parts of water. The anti-cracking anti-permeability concrete baffle special for the mountain slope provided by the invention has excellent anti-cracking property, permeability resistance and durability and can meet the use requirement of the slopes such as mountains and rivers.

The invention discloses a graph theory-based comprehensive configuration method for a spatial prismatic expandable unit mechanism folded into a straight line, relates to a comprehensive expandable unit mechanism configuration method, and aims to solve the problems that an artificial mechanism is low in comprehensive efficiency and leakage is easily caused. The comprehensive configuration method comprises the following steps: 1) according to stability judging criterions of a hinged truss system, establishing a static truss structure and an adjacently connected matrix of a spatial prismatic expandable unit mechanism; 2) by using an embryonic graph interpolation point method, and static truss spectrum as an embryonic graph, interpolating a certain number of second-degree points in appropriate positions, and converting a static truss structure into the spatial prismatic expandable unit mechanism; and 3) performing isomorphism judgment on the comprehensive spatial prismatic expandable unit mechanism, and rejecting coincident configurations, thereby obtaining a non-coincident spatial prismatic expandable unit mechanism. The method can be applied to comprehensive configuration design of spatial prismatic expandable unit mechanisms which are used for assembling spatial expandable mechanisms such as parabolic antennas and can be folded into straight lines.

The invention discloses an environment-friendly graphene oxide modified ultra-high performance concrete. According to the parts by mass, the raw materials include 945.86-962.40 part of cementitious material and 80-120 parts of steel fiber and also include water, quartz sand, graphene oxide and polycarboxylic acid high performance water reducing agent, wherein the mass ratio of the water to the cementitious material is 0.16, the mass ratio of the quartz sand to the cementitious material is 1.3, the mass of the polycarboxylic acid high performance water reducing agent powder is 0.3% of the massof the cementitious material, the cementitious material consists of 394.60-401.50 parts of cement, 156.66-159.40 parts of silica fume, 313.31-318.79 parts of fly ash and 81.29-82.71 parts of slag powder, the mass of the graphene oxide is 0.01-0.03% of the mass of the cement, and the solid amount of the polycarboxylic acid high performance water reducing agent is 0.3% of the mass of the cementitious material. The concrete is modified by graphene oxide while adding mineral fine powder. The higher content of mineral fine powder greatly reduces the content of cement and silica fume, while the graphene oxide modification effectively improves the folding-compression ratio and toughness of the concrete accordingly.

The invention discloses a special adhesive mortar material for a foam glass thermal insulation system and a preparation method and application thereof. The adhesive mortar is prepared from the following raw materials in percentage by mass 25%-50% of P.O 4.25 cement, 1%-10% of fly ash, 1%-5% of silica fume, 48%-60% of medium sand, 1.5%-3% of redispersible latex powder, 0.03%-0.18% of hydroxypropylmethyl cellulose, 0.15%-0.25% of polypropylene fiber, 0-0.1% of a defoaming agent and 0-0.1% of a water reducing agent. The adhesive mortar has high flexibility and damage resistance, has higher bonding strength, higher flexibility, higher damage resistance and higher weather resistance compared with traditional mortar, and has the advantages of being easy to construct and the like.

The invention discloses an insulation board for a building external wall, comprising a polystyrene board and a concrete protective layer cladded outside the polystyrene board, wherein the weight ratio of the polystyrene board to the concrete protective layer is (2-3):100; and the concrete protective layer is prepared from the following raw materials in parts by weight: 200-350 parts of cement, 80-120 parts of yellow sand, 30-80 parts of iron mine tailings, 30-80 parts of pebbles, 20-50 parts of broken brick, 10-40 parts of perlite, 20-50 parts of oil shale, 2-10 parts of nano calcium carbonate, 2-10 parts of silica fume, 20-50 parts of polystyrene particles, 5-15 parts of polycarbonate, 1-3.8 parts of neoprene latex, 0.5-1 part of a water reducer, 0.1-0.2 parts of cellulose ether, 0.1-0.5 part of an air entraining agent, 0.05-0.1 part of boric acid, 0.2-1 part of polyvinyl alcohol fibers, 0.1-1 part of mullite fibers and 60-110 parts of water.

The invention discloses a preparation method of a polymer steel slag cement concrete. The method comprises preparing polyphenylene sulfide emulsion; in a liquid-after-solid sequence, uniformly mixing,by weight part, 5-30 parts of cement, 10-40 parts of steel slag, 14-26 parts of sand, 10-30 parts of gravel, water reducer 0-0.3% as heavy as the steel slag, defoamer 0-3% as heavy as polyphenylene sulfide, 10-25 parts of the polyphenylene sulfide emulsion and 15-25 parts of water inside a mixing container to prepare the polymer steel slag cement concrete. The prepared polymer steel slag cement concrete reduces the content of alkali and chlorine ions, increases the rupture strength, the compressive strength and the bending-pressing ratio, significantly enhances strength as well as tenacity, achieves high wearing resistance and is good in durability when applied to road and bridge pavement.

The invention discloses a frame folding mechanism for a manned moon rover. A front frame and a rear frame are of the same structure and are symmetrically arranged with respect to a middle frame. Both the front frame and the rear frame are hinged to the middle frame so that the front frame and the rear frame can be folded oppositely. Middle wheels are symmetrically mounted on the left side and the right side of the middle frame. Front wheels are symmetrically arranged on the left side and the right side of the front end of the front frame. Rear wheels are symmetrically arranged on the left side and the right side of the rear end of the rear frame. The front wheels and the rear wheels are hinged to suspensions on the corresponding frames so that the front wheels and the rear wheels can swing upwards in the pitching direction. When the front frame and the rear frame are oppositely folded in place, each front wheel and the rear wheel on the corresponding side are attached together. According to the frame folding mechanism for the manned moon rover, the frames and a moving system can be highly folded, the folding ratio of the manned moon rover is effectively increased, and the initial storage volume of the manned moon rover in the launching process is reduced; the frame folding mechanism has the characteristics of being reasonable in design, easy to implement, low in cost and the like; and folding is easy, convenient and fast, and the whole manned moon rover is regular and attractive in appearance and convenient to carry after being folded.

The invention discloses a ketene concrete glue reducing agent and a preparation method thereof. The ketene concrete glue reducing agent is prepared from the following substances in parts by weight: 8-25 parts of dimethylacrylic acid, 8-20 parts of ketene monomer, 3-10 parts of ethylene glycol, 2-8 parts of retarder, 0.5-3 parts of initiator and the balance of water. According to the invention, theworking performance of the concrete can be improved, specifically, the cement can be more fully dispersed in the concrete, and the utilization rate of the cement is higher so that the early strengthand the later strength of the concrete are remarkably improved; in addition, the later toughness and the crack resistance of the concrete are also improved. Because the glue reducing agent has the effects of improving the strength and crack resistance of the concrete, on the premise of keeping the strength of the concrete unchanged in engineering operation, the cement consumption of concrete per unit volume can be reduced, and the service life of a concrete building is prolonged so that the engineering cost is reduced.

The invention relates to a baking-free brick which is prepared from the following raw materials in parts by weight: 30-45 parts of waste asphalt concrete, 10-15 parts of regenerated glass fiber reinforced plastic fibers, 15-20 parts of fly ash and 15-20 parts of lime powder. The baking-free brick is prepared by taking the waste asphalt concrete and the regenerated glass fiber reinforced plastic fibers as main materials, taking the fly ash and the lime powder as auxiliary materials, adding 15-20 parts of water, stirring and mixing, and carrying out compression molding and steam curing. The preparation method comprises the following steps of: crushing and sieving the waste asphalt concrete; cutting and crushing glass fiber reinforced plastic plate-shaped waste to obtain glass fiber reinforced plastic regenerated powder and glass fiber reinforced plastic regenerated fibers; adding water into the treated waste asphalt concrete, the treated regenerated glass fiber reinforced plastic fibers, the fly ash and the lime powder according to the proportion, stirring, and mixing well to obtain a mixture; weighing the mixture and pressing the mixture into a green brick; and performing steam curing on the prepared green brick, and cooling to obtain the baking-free brick. The prepared baking-free brick is more compact in structure, and the average compressive strength and the breaking strength are further improved.

The invention relates to cement slurry for concrete repair. The cement slurry for concrete repair comprises the following components in parts by mass: 30-60 parts of cement, 20-50 parts of a carboxyl material, 12-16 parts of coal ash, 5-10 parts of a butylbenzene emulsion, 0.5-5.5 parts of an early strength agent and 0.2-0.8 parts of a defoamer. The cement slurry for concrete repair provided by the invention has the advantages that according to the cement slurry for concrete repair provided by the invention, the carboxyl material is added into the formula, so that initial set of cement slurry can be accelerated, the water reducing rate of mortar can be improved, and the volume-weight of newly mixed mortar is reduced; the ratio of bending strength to compressive strength and the adhesive strength of the mortar are obviously improved, so that the quickly repaired concrete is better in durability.

The invention discloses reinforced polymer cement concrete, which is prepared from the following raw materials in parts by weight: 100 parts of cement, 5 to 15 parts of polyphenylene sulfide emulsion, 1 to 2 parts of nano silicon dioxide, 4 to 8 parts of nano diatomite, 20 to 50 parts of coarse aggregate, 5 to 15 parts of sand powder, 1 to 2 parts of a reinforcing synergist, 1 to 2 parts of a coupling agent, 1 to 2 parts of a naphthalene type water reducer, 0.1 to 1 part of alkyl tin carboxylate, 0.1 to 1 part of pentaerythritol, 0.1 to 1 part of an anti-permeability synergist, 0.1 to 0.2 part of dimethyl sulfoxide and 40-80 parts of an ethanol water solution. The invention also discloses a preparation method of the reinforced polymer cement concrete. According to the invention, the concrete structure can be effectively promoted to form a stable and fine structure, so that the volume stability of the concrete is ensured, the breaking strength, the compressive strength and the flexural-compressive ratio are enhanced, the toughness is also obviously improved, and the wear resistance is relatively strong.

The invention discloses a concrete baffle special for mountain slopes, the concrete baffle comprises the following raw materials by weight: 100 parts of cement, 250-350 parts of stones, 100-200 parts of quartz sand, 10-35 parts of coal gangue, 30-50 parts of modified steel fiber, 20-50 parts of corn straw powder, 5-12 parts of talcum powder, 10-35 parts of nano calcium carbonate, 20-35 parts of fly ash, 20-35 parts of silica fume, 20-35 parts of iron sand, 2-5 parts of epoxy resin emulsion, 1-5 parts of nitrile rubber powder, 2-10 parts of a water reducing agent, 2-5 parts of an additive and 20-50 parts of water; the additive includes raw materials of hydroxy alkyl sodium sulfonate, zinc stearate, zinc borate, sodium gluconate, acetyl tributyl citrate, benzoic acid, dicyclopentadiene dioxide and alumina. The concrete baffle special for the mountain slopes has excellent anti cracking performance, and has good impermeability and durability.

The invention discloses a colored permeable pavement material and a preparation process thereof. The pavement material comprises the following raw materials in parts by weight: 500-600 parts of colored crushed stone aggregate, 5-25 parts of slag, 5-25 parts of expanded vermiculite, 10-30 parts of fly ash, 150-250 parts of an adhesive, 10-25 parts of a reinforcing agent, 10-15 parts of a water reducing agent and 150-200 parts of water, wherein the colored crushed stone aggregate is crushed stone aggregate with the surface and gaps filled with an impregnant. According to the permeable pavement material disclosed by the invention, after the crushed stone aggregate is treated by the impregnant, compared with a traditional manner of spraying the crushed stone aggregate on the surface of a pavement after completion of pavement construction, the impregnant plays a role in protection and reinforcement, and can be used as a protective layer to improve the wear resistance of the crushed stone aggregate; and moreover, the compressive strength of the aggregate can be further enhanced by filling of the gaps of the aggregate, so the colored crushed stone aggregate is not easy to crush and fade, the compressive capacity of the pavement can be improved, the color of the pavement can be kept more enduringly, and the functionality and attractiveness of the pavement are maintained.

The invention relates to relates to mortar for exterior facing and belongs to the technical field of mortar in chemistry. The mortar for the exterior facing is prepared from the following components by mass: component I: 90-110 parts of a mixture of 90% of ordinary Portland cement and 10% of coal ash or 10% of limestone powder; component II: 90-110 parts of a mixture of one part of medium sand with particle size being 0.5-0.35 mm and two parts of superfine sand with particle size being 0.25 mm or less; component III: 40-45 parts of water; component IV: 0.4-0.6 parts of EVA latex powder. The mortar for the exterior facing is prepared by steps as follows: mixing the component II with the EVA latex powder evenly, adding part of water in the component III for mixing, and adding the component I and all remaining water in the component III for mixing after the medium sand and the superfine sand are completed covered with the EVA latex powder. The mortar for the exterior facing has the advantages of good cohesive force, small shrinkage value and good weather resistance.