49results about How to "Enhance structural strength" patented technology

The invention discloses a nano silicon dioxide modified hard wood wax oil and a preparation method thereof. The invention aims to overcome the defects of low drying speed and low hardness in the existing wood wax oil, and to be applied to furniture application instead of common wood wax oil or nitrocellulose paint / polyurethane paint. The product comprises the following raw materials in percentage by weight: 35-45% of modified hard tung oil or linseed oil, 15-25% of carnauba wax of which the softening point is 85-95 DEG C, 15-25% of linseed oil long oil alkyd of which the oil length is 78-80% and the solid content is higher than 98%, 3-5% of nano silicon dioxide of which the particle size is 60-80 nm, 20-30% of decyclized aromatic hydrocarbon of which the distillation range is 160-200 degrees, 1-2% of isooctoate compound drying agent and 0.3-0.5% of methylethylketoxime. The preparation method comprises the following steps: preparing a material A, preparing a material B, and mixing the material A and the material B.

The invention discloses a production process of a composite blockboard, comprising the following steps: sawing wood; rotary cutting; cutting boards; drying; Veneer; secondary cold pressing; secondary hot pressing; trimming; sanding; finished product. Compared with the prior art, the production process of the composite blockboard of the present invention can not only improve the flatness of products, ensure product quality, but also save labor costs, improve material utilization, reduce production costs, and improve product competitiveness.

The invention discloses a suspension stabilizer for high-temperature cement paste and high-temperature-resistant cement paste prepared by the same. The suspension stabilizer is formed by the followingcomponents according to the parts by weight: 0.5-4 parts of a fiber material, 1-5 parts of a surfactant powder material, and 0.5-2 parts of a flocculant powder material. The fiber material is a mixture of one or two materials in whisker, sepiolite, ceramic fibers, basalt fibers, and brucite fibers. The surfactant powder material is one of lauryl sodium sulfate, sodium dodecyl sulfate, hexadecylsulfonic acid sodium salt, sodium octadecyl benzene sulfonate, petroleum sodium sulfonate, white dextrin and yellow dextrin. The flocculant powder material is one of polyferric sulfate, aluminum polychlorid, and poly-aluminum ferric silicate sulfate. The high-temperature-resistant cement paste prepared by using the suspension stabilizer is low in initial consistence, and good in sedimentation stability. The suspension stabilizer is capable of improving the high-temperature suspension stability and the set cement strength of the cement paste, and providing technical support for the exploration and development of deep oil and gas resources.

The invention discloses a preparation method of cement gum for an intermediate frequency furnace. The preparation method comprises the following steps: first, uniformly mixing raw materials formed by compact brown aluminum oxide, compact brown aluminum oxide fine powder, a bonder, superfine powder, an additive and a detonation inhibitor; then, stirring the mixed raw materials and plastering the uniformly stirred cement gum around a coil; finally, after construction, naturally drying to complete hydration reaction to ensure the turn-to-turn and integral insulativity of the coil of the intermediate frequency furnace, wherein the coil has corresponding strength. The cement gum prepared by the method is long in furnace life, high in work efficiency, simple to maintain and suitable for a high-heat environment.

The invention discloses cement for an intermediate frequency furnace lining. The cement is prepared from the components in percentage by mass: 70%-80% of dense corundum, 10%-20% of dense corundum powder, 5%-15% of a binder, 0.5%-2% of superfine powder, 0.5%-3% of an additive and 0.1%-5% of an explosion-proof agent. The cement has the characteristics of prolonged service life of the intermediate frequency furnace, high operation efficiency and simple maintenance and adapts to a highly heat environment.

The invention relates to a degradable quick plugging agent. The degradable quick plugging agent is composed of three parts, wherein a base solution A is prepared by graft copolymerization of sodium carboxymethylcellulose and acrylamide; a cross-linking agent B is composed of inorganic cross-linking agents CrCl3, FeCl2 and borax; and a base solution C is a gel breaker with a degradation action and composed of H2O2 and NaOH solution. Due to a solid hydrogel generated by the reaction between the base solution A and the cross-linking agent B, the swelling property and retention property of a plugging slurry are enhanced, the success rate of plugging is increased, and the repeatability of plugging is reduced. The plugging agent has high hardness in a working state and can be applied to high-pressure places; when plugging is not needed any more, the gel breaker base solution C can permeate in a plugging gel, and a plugging main body, namely the solid hydrogel, can be decomposed and broken in a period of time and is removed further.

The invention provides a tackifier for a drilling fluid. The tackifier is composed of a viscosity increasing agent and a dispersant, wherein the viscosity increasing agent is one or more of graphene-based substances, gum polymers, and nanoparticles; and the dispersant is one or more of coco glucoside, lauryl glucoside, sodium dodecylbenzenesulfonate, and sodium oleate. At the same time, the invention also provides the drilling fluid, and the drilling fluid comprises the following components in parts by weight: 64-70 parts of base oil; 1-3 parts of organic soil; 16-20 parts of calcium chloridebrine; 1-3 parts of an emulsifier; 1-3 parts of a filtrate reducer; 0.5-1.5 parts of a wetting agent; and 0.02-1.5 parts of the tackifier for the drilling fluid. Under the condition of a relatively small addition amount of the tackifier, a viscosity of the drilling fluid can be greatly increased, and the structural force of the drilling fluid is enhanced. At the same time, the drilling fluid in which the tackifier for the drilling fluid is added can improve the quality of a filter cake, a filtration loss amount of the drilling fluid is reduced, and the stability of a well wall is improved.

The invention relates to a flexible barrier net and a design method thereof. The flexible barrier net includes main components such as a supporting column, a supporting rope and a metal flexible net.The supporting column is formed by a supporting column main body and a supporting column base. The supporting rope includes a longitudinal supporting rope, a top supporting rope, an intermediate supporting rope and a diagonal supporting rope connected between the supporting column and the metal flexible net. The lower part of the metal flexible net is arranged obliquely downstream of a slope; themetal flexible net is in a relaxed state when not impacted, the position of the bottom of the metal flexible net is fixed through a short anchor rod, and the bottom of the metal flexible net has redundancy and is folded in the upstream direction or embedded inside a slope body. The flexible barrier net is reasonable in structure, and the strength of loose rock and earth mass can be fully used to block moving rock and earth mass and systematically reduce the structural internal force.

The invention discloses a preparation method of a high-performance heat-insulating composite plate. The preparation method of the high-performance heat-insulating composite plate particularly comprises the following steps: firstly, preparing cellulose toughened silicon dioxide aerogel particles from a cotton raw material as a raw material; secondly, mixing and stirring the prepared cellulose toughened silicon dioxide aerogel particles and cement uniformly; thirdly, sequentially adding a polycarboxylic acid water reducer, river sand, nanometer titanium dioxide, a foam stabilizer, a curing agentand deionized water, and mixing and stirring uniformly; fourthly, adding a foaming agent and stirring to prepare slurry; and finally, putting the prepared slurry into a mold to perform compression molding, and maintaining, demolding and cutting to prepare the high-performance heat-insulating composite plate. The prepared composite plate has excellent mechanical property and high heat-insulating property.

The invention provides a sulphoaluminate cement composition, and a preparation method and an application thereof. The sulphoaluminate cement composition comprises a sulphoaluminate cement base material, quartz sand, staple fiber, sawdust, nano-scale silicon dioxide, a water retention agent, a cement fast-drying agent, and a high-molecular cement water-reducing agent. According to the invention, a part of the quartz sand is fetched; various additives are added to the quartz sand, and the mixture is well mixed by stirring; the sulphoaluminate cement base material is added, and stirring is continued, wherein remaining quartz sand is added during the stirring process; and the cement composition can be obtained when the mixture is well mixed. With the ratio of the raw materials and with the interactions among the raw materials, the cement composition provided by the invention can be hardened fast. The cement composition can be applied in manufacturing home crafts or bathroom sets. An obtained finished product has the advantages of no internal injury, high structural strength, smooth surface, and uniform frost. The product has high strength and can stand box drop from a height of 60cm. The preparation process is highly efficient and has low cost. A qualification rate reaches 99%.

The invention particularly relates to an H-shaped steel-concrete composite beam sub-stress adjusting system and an adjusting method thereof. The features are that the H-shaped steel-concrete compositebeam is composed of an H-shaped steel main beam, a concrete bridge deck slab and shear nails. According to the method for adjusting the sub-stress, elevation adjustment is conducted on the basis of the actually-measured counter-force generated after the steel main beam is installed and by means of jacking equipment, such as a jack and the like, through a method of filling a steel plate in the position of a support, thus realizing redistribution of the bearing counter-force, optimizing the state of the internal force of the structure, and reducing the adverse effect of the sub-stress on the structure. Through simple technical means, the sub-stress of the composite beam can be effectively adjusted, the structural stress state is improved, the anti-cracking performance of the concrete bridgedeck slab is enhanced, and the service life of the structure is prolonged.

The invention relates to a self-lubrication liquid branched-polymer shear strength improving agent and a preparation method thereof and oil-based drilling fluid in the field of oil-based drilling fluid in petroleum drilling. The self-lubrication liquid branched-polymer shear strength improving agent is prepared from a substance A and a substance B through two-step reaction. The substance A refersto Xi-R<1>-X'j, wherein X refers to a carboxylate radical; X' refers to carboxylic acid anhydride; i and j are both greater than or equal to 0; the acid group amount x accords with that x=i+2j> / =2. The substance B refers to Ym-R<2>-Y'n, wherein Y refers to a -NH2 group or -NH group; Y' refers to an alcoholic hydroxyl group or phenolic hydroxyl group; m and n are both greater than or equal to 1; the alkaline group amount y accords with that y=m+n> / =2; i+2j+m+n is greater than or equal to 5; R<1> and R<2> are both straight chains, branch chains, cyclic aliphatic alkyl groups or aromatic alkyl groups, and a carbon atom number range is 1-72. Due to great self-lubrication and low-viscosity effects of branched polymer, integral structural force of an oil-based drilling fluid system can be increased, organic soil consumption and low-density solid phase tolerance of the oil-based drilling fluid system are decreased, and technical problems of rheological adjustment and borehole cleaning in a construction process of large-displacement wells and horizontal wells in application of the oil-based drilling fluid are solved.

The invention provides a rotor assembly for a disc motor and the disc motor. The rotor assembly for the disc motor comprises a rotor support disc, an annular hoop and a positioning pin, the rotor support disc is in a circular shape with a central opening, a boss is disposed on the outer circumferential surface of the rotor support disc, the annular hoop sleeves the rotor support disc, the inner circumferential surface of the annular hoop is provided with a clamping slot matched with the boss, and the positioning pin connects the rotor support disc with the annular hoop and used for limiting relative rotation between the rotor support disc and the annular hoop. The mode of sleeving the rotor support disc with the annular hoop is adopted, not only is the effect of enhancing the structural strength of a centrifugal force during high-speed rotation achieved, but also automatic weight reduction of an automatic dynamic balancing machine can be supported, the automatic production is met, andthe cost can be reduced.

The invention discloses an unfired clay tile and a production technology thereof. The clay tile comprises, by weight, 10-15 parts of natural colored sands, 10-15 parts of natural colored quartz sands, 3-5 parts of polyester resin, 2-5 parts of a shrinkage agent, 5-8 parts of alkali-free glass fibers, 0.5-1 part of zinc stearate, 1-2 parts of a skeleton reinforced material, 2-5 parts of light magnesium oxide and 0.02-0.05 part of an antioxidant. The production technology comprises the following steps: (1) mixing the polyester resin, polystyrene resin and zinc stearate according to the above formula, stirring the mixed raw materials, adding the natural colored sands, continuous stirring the mixed raw materials and the natural colored sands, adding the alkali-free glass fibers, the light magnesium oxide, the antioxidant and the natural colored quartz sands, and stirring all above raw materials; and (2 ) placing a product obtained in step (1) in a molding chamber, adding the skeleton reinforced material, and molding the product and the skeleton reinforced material to obtain the unfired clay tile. The unfired clay tile produced through the method has the advantages of high strength, high flexural and compressive strength, good toughness and light weight and is suitable for various roofings.

According to a gradient hemmed battery disclosed by the invention, a battery top shell, a shell sealing suite and a battery cell suite are arranged. In an actual application process, a plurality of hem groups are arranged, each hem group comprises a plurality of layers of hems, and the hem curvature of each layer of hem is gradually reduced or gradually increased. The layer of hem with the maximumhem curvature is used for jacking a sealing ring body to the step edge, namely, the layered hem with the maximum hem curvature is used for fastening the battery top shell to prevent relative displacement of the battery top shell relative to the battery shell and prevent the situation in which the height of the gradient hemmed battery is changed, the other layers of hems are combined and used forassisting in enhancing the structural force of the gradient hemmed battery, so that the structural stability of the gradient hemmed battery is enhanced, the gradient hemmed battery is not prone to deformation, and the service life of the gradient hemmed battery is greatly prolonged.

The invention provides a preparation method of a lifted cutting agent. The preparation method comprises the following steps: a styrene vinyl carboxylic acid copolymer, diamine and hydroxyl aliphatic acid are subjected to a reaction to obtain the lifted cutting agent. The lifted cutting agent takes the styrene vinyl carboxylic acid copolymer, diamine and hydroxyl aliphatic acid as raw materials, the lifted cutting agent has an alternative structure, can increase the structural force of drilling fluid, and has higher lifted cutting rate, the oil-based drilling fluid using the lifted cutting agent has high lifted cutting force and strong dynamic carrying and static suspension capability, and requirement of on-site construction can be better satisfied. The lifted cutting agent prepared by theabove technical scheme has a structure shown in a formula I. The invention also provides the oil-based drilling fluid of the lifted cutting agent.

The invention discloses an environment-friendly efficient extraction tank, and belongs to the technical field of essential oil extraction, the environment-friendly efficient extraction tank comprises a placing rack, an extraction tank body, a defoaming system, a reflux system, a door opening and closing system, an extraction liquid discharge system, a self-locking system and a plurality of pipelines, the extraction tank body is mounted on the placing rack, the defoaming system is mounted on the extraction tank body, the reflux system is mounted on the side of the placing frame and is communicated with the defoaming system through a pipeline, the other end of the reflux system is communicated with the extraction tank body through a pipeline, the extraction liquid discharge system is mounted at the bottom of the extraction tank, and the door opening and closing system is mounted in the extraction tank body. The self-locking system is installed at the bottom of the extraction tank body, it is guaranteed that an opening and closing door locks the bottom of the tank body, the service life of the opening and closing door is prolonged, meanwhile, working efficiency is improved, energy is saved, and backflushing gas in the tank is prevented from escaping from the connecting position to pollute the air environment of a workshop.

The invention belongs to the technical field of epoxy adhesives, and particularly relates to an epoxy structural adhesive for assembling prefabricated segments. The invention discloses an epoxy structural adhesive for assembling prefabricated segments, which comprises a component A and a component B in a mass ratio of 3:1, wherein the component A is prepared from 40 to 50 parts of self-made graphene modified epoxy resin, 25 to 30 parts of bisphenol A epoxy resin, 15 to 20 parts of bisphenol F epoxy resin, 5 to 10 parts of diluent, 3 to 5 parts of silane coupling agent A, 1 to 2 parts of modified graphene, 1 to 2 parts of thixotropic agent and 20 to 30 parts of filler; and the component B comprises 20-25 parts of cardanol modified amine, 10-15 parts of polyamide, 1-2 parts of an accelerant,0.5-1 part of a toughening agent, 16-20 parts of modified aliphatic amine and 1-2 parts of a silane coupling agent B.

The invention relates to a mortar concrete waterproof agent, which has the advantages of strong water and moisture resistance. The invention discloses a high-efficiency crack-resistant multifunctionalconcrete and mortar waterproof additive, which is prepared from 4-5 parts of polyvinyl alcohol, 3-4 parts of stearic acid, 3-4 parts of aqueous ammonia, 2-3 parts of tri-tincture ester and 90-110 parts of water. The mortar concrete waterproof agent has superior effect of water and moisture resistance, anti-seepage, and leaking stoppage.

A preparation method of cellulose-toughened silicon dioxide aerogel includes following steps: (1), according to a proportion of 1g:(15-30)mL, soaking cotton in concentrated sulfuric acid for 20-35min,stirring at 40-60 DEG C for 2-3h, using deionized water to flush, centrifuging for several times until a solution is close to neutral, and extracting the deionized water to obtain cellulose sol; (2),mixing methyl trimethoxy silane, dimethyl dimethoxy silane, cetyl trimethyl ammonium bromide, N, N-dimethylformamide, CH3COOH and CH3CH2OH according to a proportion of 1mL:(0.4-0.9)mL:(0.1-0.3)g:(0.4-0.8)mL:(8-20)mL:(5-10)mL, and stirring at 25-40 DEG C for 60-80min; (3), adding the cellulose sol into mixed liquid according to a proportion of 1mL:(0.5-4.0)g, using ammonia water to adjust pH to 8-9, and aging at 35-50 DEG C for 5-8h; (4), using isopropanol and n-hexane for washing, drying at 30-35 DEG C for 10-15h, and drying at 38-45 DEG C for 20-40h to obtain the cellulose-toughened silicondioxide aerogel. The aerogel is high in porosity, hydrophobicity, mechanical performance and oil absorption rate and reusable.

The invention relates to an arch bridge boom anti-relaxation structure system. An anti-relaxation structure system is arranged at the end of a boom, total rigidity after combination of the anti-relaxation structure system and the boom is regulated so as to control inner force change amplitude of the boom, therefore, relaxation due to too small pull force of the boom under live load is prevented, further, fatigue stress amplitude in the boom is reduced, and anti-fatigue performance of the boom is improved. Through adoption of the arch bridge boom anti-relaxation structure system, rigidity and internal force of the structure can be improved, pull change amplitude of the boom under live load is controlled so as to enable inner force of the boom to be in an expected state, and the anti-fatigueperformance of the boom is improved. The arch bridge boom anti-relaxation structure system is economical and practical, is highly operable and adaptive, and has very high promotion and application values particularly for short suspension cables at two ends of the arch bridge.

The invention discloses a Chinese fir core fireproof and flame-retardant environmental-friendly core-board and a preparation method thereof. The preparation method comprises the steps that two ends ofdried Chinese fir board strips are combed by a rack shaping machine, and then the board strips are butted into required lengths; adhesives with fireproof flame retardants are coated on the side surfaces of the butted board strips, and the board strips are fed into a four-side lateral pressing machine for compression to form board cores after being assembled to required widths; fireproof and flame-retardant penetrating fluid is uniformly sprayed or coated on the two surfaces of the board cores; the board cores are fed into a drying chamber for baking, cooling and shaping; slotting is carried out on the front surfaces and the back surfaces of the board cores, and slots are filled with the adhesives with the fireproof flame retardants; the front surfaces and the back surfaces of the board cores are painted with the adhesives and covered with single boards; stored slabs are subjected to hot pressing after being pre-compacted; the front surfaces and the back surfaces of sand flat slabs aresubjected to rubber coating and pasted with veneers and being subjected to hot pressing; and finished products are obtained after cooling and shaping. According to the Chinese fir core fireproof andflame-retardant environmental-friendly core-board and the preparation method thereof, through the technologic innovation, prepared core-boards can achieve a quite good fireproof and flame-retardant effect, and the fireproof and flame-retardant grade reaches grade B1.

The invention provides an environment-friendly wall material and a preparation method thereof, and belongs to the technical field of building materials. The environment-friendly wall material is prepared from the following raw material components of cement, a silicon-containing solid waste material, resin, plant fibers, a cement expansion agent and water, wherein the silicon-containing solid wastematerial comprises one or more types of foreign silicon-containing solid waste. According to the environment-friendly wall material and the preparation method thereof, the foreign solid waste formedafter waste treatment in industrial production serves as a filler, thus the problem of waste treatment of all manufacturers is solved, environmental pollution is also relieved, and the preparation cost of the environment-friendly wall material is lowered greatly; and furthermore, the foreign silicon-containing solid waste is adopted, thus a gel material is more compact, the strength is improved, impervious performance is also improved, the durability and compression-resistant and bending-resistant strength of the concrete are effectively enhanced, and thus the working performance of the concrete, namely the environment-friendly wall material can be improved.

The invention relates to a manufacturing method for a square beam. The manufacturing method comprises the following steps that 78-123 kg of ferrous sulfate, 1-5 kg of ammonium ferrous sulfate, 1-9 kgof pyrrolidone carboxylic acid-triethanolamine salt, 7-12 kg of sodium benzoate, 5-12 kg of chondroitin sulfate, 9-14 kg of collagen hydrolysates, 5-8 kg of bamboo charcoal fibers, 7-12 kg of long mica and 1-5 kg of hydroxypropionic acid are prepared, 198-348 kg of high-alumina cement is prepared, the previously prepared materials are added into the 198-348 kg of high-alumina cement for mixing, water which is 20 times the weight of the mixture above and sand which is 5 times the weight of the mixture above are added, and the whole mixture is uniformly mixed in a blender, poured into a square beam mold and heated at 60-78 DEG C for 11-23 days. The square beam is not easily bent and deformed and bears a large structural force during imbalance, and the manufacturing method is simple.

A wood-plastic composite material production unit relates to a composite material production unit. The present invention aims to solve the disadvantages of difficulty in controlling the foaming of polyolefin wood-plastic composite foamed boards in a mold and difficulty in molding after ejection in the existing production process of wood-plastic composite materials. The extrusion die (2) of the present invention is installed on the output end of the wood-plastic composite extruder (1), the extrusion die (2), the cooling guide roll (3), the heating calender roll (4), and the active cooling shaping roll (5) and a plurality of passive cooling and shaping rolls (6) are installed sequentially from left to right, and the transmission assembly (8) connects the active cooling and shaping roll (5) and the passive cooling and shaping roll (6), and two adjacent cooling and shaping rolls ( 6) is respectively provided with a cooling water spraying device (7) above and below. The invention is used for the production of wood-plastic composite materials.

The utility model relates to an aspirator, an aspiration assembly and a thrombectomy system. The aspirator comprises a sleeve, a limiting piece, a piston rod and a piston ring, and the sleeve is provided with an aspiration cavity and an aspiration nozzle; the limiting piece is provided with a limiting part, the limiting piece is connected with the side wall of the sleeve, and at least part of the limiting part penetrates through the side wall of the sleeve to extend into the suction cavity; the piston rod is movably contained in the suction cavity and can move in the axial direction and rotate in the circumferential direction of the sleeve, the piston rod comprises a rod body, a plurality of limiting pieces and a plurality of supporting pieces, and the multiple limiting pieces are arranged on the rod body at intervals in the axial direction of the rod body and used for being matched with the limiting part so as to limit the piston rod; the two ends of each supporting piece abut against the two adjacent limiting pieces respectively. The piston ring is connected with the end, close to the suction nozzle, of the rod body, is connected with the inner side wall of the suction cavity in a sealed mode and can synchronously and axially move along with the rod body so that the suction cavity can be in a negative pressure state or restore to a natural state. The negative pressure suction device is good in negative pressure effect.

The invention relates to a self-lubricating liquid branched polymer cutting agent in the field of oil-based drilling fluid in petroleum drilling, a preparation method thereof and an oil-based drilling fluid. The self-lubricating liquid branched polymer cutting agent is prepared from raw materials comprising the following components through a two-step reaction: Class A substance: X i -R 1 ‑X’ j ; Wherein, X is a carboxylate group, X' is a carboxylic acid anhydride; i, j are all ≥ 0, and the total number of acid groups x=i+2j ≥ 2; Class B substances: Y m -R 2 -Y' n ; where Y is ‑NH 2 group or -NH group, Y' is an alcoholic hydroxyl group or a phenolic hydroxyl group, m and n are both ≥ 1, and the total number of basic groups y=m+n≥2; and, i+2j+m+n≥5; R 1 and R 2 All are linear, branched or cyclic aliphatic or aromatic alkyl groups, with carbon numbers in the range of 1 to 72; the branched polymer of the present invention has good self-lubricating and low-viscosity effects, and can improve oil The overall structural strength of the base drilling fluid system, the reduction of the amount of organic soil and the tolerance of the oil-based drilling fluid system to low-density solid phases solve the problem of rheological adjustment and Wellbore cleaning technical problems.

The invention discloses a nano silicon dioxide modified hard wood wax oil and a preparation method thereof. The invention aims to overcome the defects of low drying speed and low hardness in the existing wood wax oil, and to be applied to furniture application instead of common wood wax oil or nitrocellulose paint / polyurethane paint. The product comprises the following raw materials in percentage by weight: 35-45% of modified hard tung oil or linseed oil, 15-25% of carnauba wax of which the softening point is 85-95 DEG C, 15-25% of linseed oil long oil alkyd of which the oil length is 78-80% and the solid content is higher than 98%, 3-5% of nano silicon dioxide of which the particle size is 60-80 nm, 20-30% of decyclized aromatic hydrocarbon of which the distillation range is 160-200 degrees, 1-2% of isooctoate compound drying agent and 0.3-0.5% of methylethylketoxime. The preparation method comprises the following steps: preparing a material A, preparing a material B, and mixing the material A and the material B.

The utility model relates to an aspirator, an aspiration assembly and a thrombectomy system. The aspirator comprises a sleeve, a limiting piece, a piston rod and a piston ring, and the sleeve is provided with an aspiration cavity and an aspiration nozzle; the limiting piece is provided with a limiting part, the limiting piece is connected with the side wall of the sleeve, and at least part of the limiting part penetrates through the side wall of the sleeve to extend into the suction cavity; the piston rod is movably contained in the suction cavity and can move in the axial direction and rotate in the circumferential direction of the sleeve, the piston rod comprises a rod body, a limiting piece and a supporting piece, the limiting piece is connected with the rod body and used for being matched with the limiting part to limit the piston rod, the supporting piece is connected with the rod body, and the supporting piece abuts against the side face of the side, away from the suction nozzle, of the limiting piece; the limiting piece is supported; the piston ring is connected with the end, close to the suction nozzle, of the rod body, is connected with the inner side wall of the suction cavity in a sealed mode and can synchronously and axially move along with the rod body so that the suction cavity can be in a negative pressure state or restore to a natural state. The negative pressure suction device is good in negative pressure effect.

The invention relates to the technical field of building materials, in particular to an environment-friendly wall material and a method for preparing the environment-friendly wall material. The environment-friendly wall material is prepared from the following raw materials of cement, silicon-containing solid waste materials, inorganic fiber or organic fiber, a cement expansion agent and water, wherein the silicon-containing solid waste materials include one or more foreign silicon-containing solid waste, and the cost of the environment-friendly wall material is low. The method for preparing the environment-friendly wall material comprises the steps of: (1) mixing the water, the silicon-containing solid waste materials, the cement and a cement reinforcing agent, and performing stirring to obtain an A group of materials, wherein the silicon-containing solid waste materials include one or more foreign silicon-containing solid waste; (2) mixing calcium stearate with the inorganic fiber ororganic fiber, and performing stirring so as to form a B group of materials; (3) preparing the cement expansion agent as a C group of materials; and (4) adding the B group of materials and C group ofmaterials into the A group of materials sequentially, and performing stirring and foaming to obtain the environment-friendly wall material. The environment-friendly wall material which has low production cost can be prepared through the method.