209results about How to "With pressure" patented technology

The invention relates to a polyether-ether-ketone composite material which consists of polyether-ether-ketone, nanoparticles, filling materials and addition agent materials. The composite material comprises 75 to 95 portions of polyether-ether-ketone powders, 5 to 10 portions of the nanoparticles, 10 to 20 portions of the filling materials and 2 to 5 portions of the additive agents by weight. The filling materials are glass fiber, carbon fiber, quartz powder and MoS2 or toner. A method of compression moulding forming adopted is that: materials is prepared according to the formula; materials are mixed: the materials prepared according to designed requirements poured into an automatic material mixing machine for evenly mixing, the mixing time is between 0.5 minute and 3 minutes, then compressing process is carried out, and the blended mixture is sent to a mould cavity for moulding. The material can be used for sealing materials products. Various valve sealing elements produced by the invention has properties of creep resisting, corrosion resistance, heat resistance and pressurization, etc.; the ability of pressurization and wear resistance of the material are improved, and at the same time the cost is lowered by 10 to 20 percent or even higher, thus being beneficial to using and promotion of the materials.

The clamper is used for high temperature and high pressure glass miniature modules that is meant to judge the water drive oil effects and review in oil and gas exploration. On the base of the module and the center of the module cap, there are holes with steps and glass viewing window inside. Among the glass viewing window, module base and the inner wall of the central hole of the module's top cap, there is an O type sealing gasket. Between the module base and the top cap of the module, a high pressure confined chamber is formed. A high pressure pipe is fixed on the duct that is the head of the top cap of the module. Inside the high pressure confined chamber, there is a module bracket. A miniature transparent simulation porous module is pressed tightly against the module bracket. The invention can finish the simulative study of miniature transparent simulative porous module under the high temperature and high pressure of the strata, observing the module porosity and the liquid within the clamper clearly under the microscope. The experiment data surpass the current result in constant temperature and pressure.

The invention relates to a movable split-type refuge chamber, belonging to the technical field of life saving apparatus. The movable split-type refuge chamber is characterized by comprising a transfer chamber, a main chamber and an auxiliary chamber; the movable transfer chamber and the main chamber which are combined by sealing joints and the movable auxiliary chamber and the main chamber which are combined by sealing joints form the refuge chamber; a transfer chamber body is provided with a front chamber door, the main chamber body is provided with a side chamber door, and the auxiliary chamber is provided with a life saving chamber door; and the refuge chamber is provided with an environment monitoring device, a power supply, a communication telephone, an oxygen gas steel cylinder and / or a food storage device. The movable split-type refuge chamber has the advantages of collapse resistance, gas explosion resistance, sealing of the influx of underground noxious gas, adjustment of temperature and humidity, automatic oxygen supply, free arrangement and combination, favorable air tightness and heat insulation effect, simpleness of installation, convenience and flexibility, investment saving, and ability to provide a set of complete life assurance system for escaping persons on site, and the like.

The invention provides a low-temperature PPR (Polypropylene Random Copolymer) pipe which is prepared by uniformly mixing PPR resin, polyethylene and an impact modifier in a certain proportion as raw materials, and extruding by an extruding production line, wherein the weight parts of the PPR resin, the polyethylene and the impact modifier are as follows: 100 parts of the PPR resin, 1-20 parts of the polyethylene and 1-20 parts the impact modifier. The low-temperature PPR pipe disclosed by the invention has higher low-temperature resistance, does not become fragile at a low-temperature environment and can be used at a temperature in a range of minus 10 DEG C to 95 DEG C. The low-temperature PPR pipe has the characteristics of strong toughness, impact resistance, pressure resistance, obvious low-temperature resistance and the like; the application range is greater than that of a common PPR pipe; and the low-temperature PPR pipe adapts to various complicated environments and the cost is saved.

The invention discloses an induction time-delay faucet. The induction time-delay faucet is characterized in that the induction time-delay faucet comprises a 12V direct-current power supply, a microwave induction and detecting circuit and a monostable time-delay and electronic control faucet driving circuit; the model of a microwave induction controller IC2 in the microwave induction and detecting circuit is TX982; the monostable time-delay and electronic control faucet driving circuit is composed of a time-base circuit IC1, a resistor R1, a timing capacitor C1 and an electronic control faucet, and the model of the time-base circuit IC1 is NE555. According to the induction time-delay faucet, a new path is found; the induction time-delay faucet is made of common electronic components completely; the induction time-delay faucet has the advantages of being simple in structure, low in manufacturing cost, capable of withstanding voltage and convenient to repair, and being convenient to operate, sanitary and low in power consumption and the like in the aspect of usage; the faucet is suitable for the occasions such as hotels, office buildings, hospitals, passenger stations and airports.

The invention relates to surface printed solidified matte ink and a preparation method thereof. The surface printed solidified matte ink is formed by adding a curing agent into an ink base material according to a ratio of 6-10% and stirring, wherein the ink base material comprises the following ingredients: 23 parts of n-propyl ester, 10 parts of butyl acetate, 8 parts of a polyurethane resin, 10 parts of aldehyde ketone resin, 1 part of a flatting agent, 40 parts of light removing slurry, 7 parts of ternary chlorine vinegar resin, 0.5 part of an antifoaming agent and 0.5 part of a dispersing agent; the n-propyl ester, the butyl acetate, the polyurethane resin, the ternary chlorine vinegar resin and the aldehyde ketone resin are firstly ground, combined with the flatting agent and the light emitting slurry, and are subjected to high-speed dispersion, the ingredients are filtered and packaged into finished products, and 6-10% of the curing agent is added, thus obtaining the ink which can be used for printing. The matte ink can be used for directly printing in a matte manner to form a film, personal hollow printing or conventional covering printing is realized, the adhesive force is high, the surface is smooth, the matte effect is remarkable, and the production cost is lowered. The surface printed solidified matte ink is applicable to printing on coiling drums of wall paper, chrome paper, kraft paper, leatherette paper and various special types of paper, and meanwhile the ink is applicable to printing on PE (Poly Ethylene), PET (Polyethylene Terephthalate), BOPP (Biaxially-oriented Polypropylene), pearly luster films and twisting films with corona layers.

The invention belongs to the field of mines, and relates to a riverbed seepage-proof governing structure. According to the riverbed seepage-proof governing structure, a quaternary seepage-proof structure is arranged on a disturbed riverbed, and the quaternary seepage-proof structure is divided into four layers from bottom to top, namely a riverbed reinforcing layer, a seepage-proof cushion layer, a seepage-proof layer and a seepage-proof protective layer are sequentially laid. According to the design, engineering geology, environment characteristics and technical features of a composite geo-membrane are fully considered, and therefore the effect of the disturbed riverbed seepage-proof governing is enabled to good, and governing cost is lower.

The invention discloses wear-resistant paint in submarine gas transmission / condensate transmission pipelines. The paint comprises primer and topcoat both having double components, wherein a component A in the primer comprises epoxy resin, solvents, additives and pigment fillers; a component B in the primer comprises modified amine curing agents and mixed solvents; the component A in the topcoat comprise phenolic resin, epoxy resin, additives, pigment fillers and solvents; and the component B in the topcoat comprises modified phenol-aldehyde amine curing agents, modified amine curing agents and mixed solvents. The paint is characterized in that the paint has good adhesion, oil resistance and pressure resistance by adopting the phenolic resin combined with novel epoxy resin and adopting two types of modified amine in different molecular weight as curing agents, and is short in surface drying time, good in wear resistance and good in flexibility. The combination degree of the primer and the topcoat adopted by the paint greatly improves the corrosion resistance of coatings.

The invention relates to a steering gear, in particular to an underwater electric steering engine and a rudder angle detection method. The underwater electric steering engine comprises an output shaft, an engine base, a worm wheel, a worm, a power system and a steering engine controller. The power system drives the output shaft to rotate through transmission of the worm and the worm wheel. The output shaft extends out of the end, provided with a shaft end cap, of the engine base, and the output shaft is provided with a limiting swing piece at the end. A swing groove is formed in the shaft end cap. The limiting swing piece swings in the swing groove. The steering engine controller is connected with a motor in the power system. An incremental encoder is arranged on the motor. The limiting swing piece and the steering engine controller are used for determining the rudder angle zero point position. The incremental encoder is used for detecting angle change values of a motor output shaft so as to determine the absolute position of the current rudder angle. The power system is arranged in a shell. The shell communicates with the engine base, and the interior of the shell is an oil-filled sealed space. An oil pipe is connected with the shell. The underwater electric steering engine is compact in overall structure and capable of meeting operation demands of full-ocean-depth low-speed large-torque and large-moment output.

The invention discloses a method for recycling and comprehensively utilizing reverse osmosis concentrated water produced after treatment of coking wastewater. In the steel industry, a widely used reverse osmosis process in a coking wastewater treatment technology can produce 70% of high-quality effluent and 30% of reverse osmosis concentrated water. Pollutants in water are intercepted and concentrated by a reverse osmosis membrane, but the pollutants are not removed, so the pollutants are completely concentrated in the reverse osmosis concentrated water. According to a traditional treatment method for reverse osmosis concentrated water produced after treatment of coking wastewater, reverse osmosis concentrated water is used as slag washing water in the iron and steel industry, and toxic and harmful substances can be volatilized under the action of high temperature, which causes conversion of water pollution into gas pollution and leads to a severe environment of a working site. According to the invention, a combined process of pretreatment (bi-alkali softening, advanced oxidation and ultrafiltration)-electrodialysis-reverse osmosis-bipolar membrane electrodialysis is innovatively adopted to realize zero discharge of coking wastewater.

The invention discloses a heat preservation, heat insulation and elastic grout joint filling. The grout joint filling comprises the following components in weight portion: 20 to 40 portions of vitrified micro bubble, 20 to 40 portions of acrylic ester synthetic resin, 20 to 30 portions of polypropylene short fiber and 5 to 10 portions of mica powder. The coefficient of heat conductivity(W / (mk)) of the grout joint filling is less than or equal to 0.07, and the elastic stretch modulus(MPa(23 DEG C,,20 DEG C below zero)) is more than 0.4 or more than 0.6, so that the grout joint filling has the advantages that besides the characteristics of endurance, water resistance, pressure resistance and the like which are possessed by the common ceramic wall floor tile grout joint filling, the grout joint filling of the invention also has the effects of heat preservation and heat insulation, and the functions of a certain elastic stretch modulus, fire resistance and sound insulation.

The invention discloses a stitch-free silicon rubber corneal arcus for use in a vitreous body resection operation using a needle with casing pipes, which consists of a medical silicon rubber ring, wherein the surface between the upper and lower two ends of the ring have a spherical shape having a curvature similar to that of eye balls; the periphery of the bottom surface of the ring is provided with first sectorial thin claw, second sectorial thin claw and third sectorial thin claw which have the same structure at the positions corresponding to three casting pipes respectively; the inside diameter a of the ring is more than or equal to 10 millimeters and less than or equal to 12 millimeters, the thickness b is more than or equal to 1 millimeter and less than or equal to 2 millimeters, and the height c is more than or equal to 1 millimeter and less than or equal to 3 millimeters; the length e of the sectorial thin claws is more than or equal to 3 millimeters and less than or equal to 8 millimeters, the thickness f is more than or equal to 0.1 millimeter and less than or equal to 1.5 millimeters and the radian g of the sectors is more than or equal to 20 DEG and less than or equal to 90 DEG; and the coplanar curvature d of the bottom surface of the ring and the first, second and third sectorial thin claws ranges from 10 millimeters to 14 millimeters. The stitch-free silicon rubber corneal arcus has the advantages of simple structure, convenient operation, stable supporting effect and suitability for various vitreous body resection operation systems using the needle with casing pipes.

A flexible LCD comprises an upper flexible plastic substrate, a lower flexible plastic substrate, a frame gum, an upper ITO (Indium Tin Oxides) electrode, a lower ITO electrode, an upper PI oriented film, a lower PI oriented film, a plurality of spacing balls and liquid crystals, wherein the upper flexible plastic substrate is parallelly arranged at the relative position above the lower flexible plastic substrate; the frame gum is bonded between the upper flexible plastic substrate and the lower flexible plastic substrate to form a sealed F-LCD box; the upper ITO electrode is carved on the lower surface of the upper flexible plastic substrate; the lower ITO electrode is carved on the upper surface of the lower flexible plastic substrate; the upper PI oriented film is coated on the upper ITO electrode; the lower PI oriented film is coated on the lower ITO electrode; the spacing balls are mounted between the upper flexible plastic substrate and the lower flexible plastic substrate; and the liquid crystals are filled in the F-LCD box. The flexible LCD has the advantages of smaller thickness, bendability, pressure resistance, low probability of breakage, shock resistance and the like.

The invention provides a raw oil lifting system and a method for conveying a fluid by utilizing a sliding vane pump. The raw oil lifting system comprises an oil pipe and an oil pump connected with the oil pipe, wherein the oil pump is the sliding vane pump; the sliding vane pump is provided with a barrel-shaped stator; a drive shaft arranged in the stator along a direction parallel to the length of the stator, and a rotor sleeved onto the drive shaft are arranged in the stator; the lower end of the stator is provided with a suction disk; the upper end of the stator is provided with an exhaustion disk; the suction disk, the exhaustion disk and the stator form a barrel-shaped inner cavity; the rotor is arranged between the suction disk and the exhaustion disk; the suction disk is provided with a suction hole for sucking raw oil; and the exhaustion disk is provided with an exhaustion hole for exhausting the raw oil. The method for conveying the fluid by utilizing the sliding vane pump comprises the steps of sucking and exhausting the fluid from the direction of the end part of the stator to perform a lifting process.

The invention provides a cooling system for a vehicle, with functions of automatically exhausting gas in a cooling loop and replenishing water. The cooling system comprises a large circulating pipeline, a small circulating pipeline and an expansion water tank that are connected with an engine water jacket, wherein the engine water jacket is provided with a water replenishing hole and an exhaust hole, the water replenishing hole is communicated with the expansion water tank through a water replenishing pipe, and the exhaust hole is communicated with the expansion water tank through an exhaust pipe. By adopting the technical scheme provided by the invention, blockage due to dead regions of parts, gasification of a cooling liquid at high temperature, and gas brought in by expelling high-pressure gas outside the cylinder gasket or injecting the cooling liquid of the engine cooling system can be effectively eliminated, thus heat radiating efficiency of the engine cooling system is ensured. Meanwhile, the expansion water tank of the cooling system has a water replenishing function, loss of the cooling liquid can be immediately made up, and reliability of a cooling and heat-radiating system is improved.

The invention belongs to the technical field of processing of tea leaves, and particularly relates to a tea leaf rolling method and a processing technology of a green tea and a black tea using the method. According to the tea leaf rolling method and the processing technology disclosed by the invention, in tea leaf rolling working procedures, globular rolling assisting substances are added to tea leaves to be rolled, and at least the spherical surfaces of the globular rolling assisting substances are covered with food-level glue layers, so that the tea leaf rolling effect of the tea leaf rolling working procedure in the prior art can be greatly improved. The processing steps of tea leaves can be further simplified, and synchronously, the quality and the uniformity of the tea leaves are improved. Besides, according to the working procedures of performing roller fixation on fresh green tea leaves, rolling the tea leaves on which fixation is performed, primary drying and sufficiently drying, and the working procedures of withering fresh black tea leaves, rolling the withered tea leaves, fermenting the rolled tea leaves, primary baking the fermented tea leaves and sufficiently drying the dried tea leaves, and based on the method, the processing flows of the black tea and the green tea in the prior art are further simplified, and synchronously, the quality and the processing efficiency of the tea leaves are improved.

The invention discloses a pig feed synergist capable of improving productivity. The pig feed synergist is prepared from, by weight, 40-50 parts of cassava leaves, 5-10 parts of shepherd's purse, 20-24 parts of peanuts, 5-10 parts of lemon juice, 20-25 parts of pleurotus eryngii, 10-13 parts of rape pollen, 15-20 parts of pumpkin seed kernels, 8-10 parts of honey, 6-7 parts of green tea, 4-5 parts of licorice roots, 3-4 parts of nanometer montmorillonite powder, a proper amount of Grifola frondosa hyphae, a proper amount of Kombucha and a proper amount of water. By treating cassava leaves with Kombucha, the appetite of bred animals for cassava leaves can be increased, the digestion and absorption of cassava leaves in the bodies of bred animals can be prompted, and the balance of nutritional ingredients in the bodies of bred animals can be improved. As pollen has tough cell walls, multiple enzymes are secreted by Grifola frondosa hyphae and can effectively break pollen walls, nutritional substances in pollen are released, and the content of polysaccharide and protein in fermentation liquor is increased. Nanometer montmorillonite can adsorb germs and heavy metal and effectively solve the problem of antibiotic and heavy metal residuals. The pig feed synergist can increase the appetite, regulate the metabolism of organisms, promote the growth and development of pigs and improve the productivity.

The invention discloses a corrosion resistant aerated building block and a making method thereof. The corrosion resistant aerated building block is made from, by weight, 23-27 parts of waste concrete, 28-36 parts of quartz sand, 16-29 parts of pine sawdust, 13-21 parts of porous ceramsite, 18-34 parts of zirconium-silicon slag, 32-46 parts of high sulfate resistance Portland cement, 17-33 parts of pumice, 14-26 parts of kyanite, 22-34 parts of marine dredged sludge, 11-22 parts of desulfurized gypsum, 19-28 parts of calcium carbide slag, 10-15 parts of hawthorn fruit seed powder, 8-12 parts of sodium polystyrene sulfonate, 3.5-5 parts of calcium hydride and a proper amount of water. The aerated building block has the advantages of strong corrosion resistance, strong resistance to acids, alkali, salts and other corrosive media, high strength, good durability, impermeability, low heat conduction coefficient, good crack resistance, safety, environmental protection and durability.

The invention discloses a mosquito-repellent and insect-resistant health coating with a natural plant extraction solution and a preparation method thereof, and relates to the technical field of coatings. The mosquito-repellent and insect-resistant health coating is prepared from the following components in parts by weight: 50-70 parts of waterborne synthetic resin emulsion, 10-25 parts of filler, 0.1-0.5 part of wetting agents, 0.2-0.4 part of dispersants, 0.2-0.6 part of defoaming agents, 5-10 parts of natural plant extraction solution, 2-10 parts of plant essential oil, 10-30 parts of deionized water, 100-250 parts of titanium dioxide, 0.2-1 part of thickening agents, 0.3-0.8 part of flatting agents, 0.1-0.3 part of pH regulators and 0.1-0.15 part of film forming additives, wherein the natural plant extraction solution is an azadirachta indica plant extraction solution. The coating has the characteristics that the coating is capable of efficiently repelling mosquitoes and resisting insects and is free of pollution to people and surrounding environments, and effective components of the plant extraction solution are slowly released in the coating and exert the effects for a long time.

The invention provides a floor production process with low cost and simple working procedure, which comprises the following steps: by using a rabbet model, extruding a floor with rabbets at two sides by using an extruder; making rabbets at other two opposite sides of the extruded floor by using a double-head notching machine; printing patterns containing textures on the surface of the floor; and finally adhering an abrasion-resistant layer to the surface of the floor.

The invention provides a broadband transducer and a preparation method thereof. The broadband transducer comprises a potting material (1), a piezoelectric material (2), a filling material (3), a backing material (4), a transducer base (5) and a cable (6), the piezoelectric material (2) comprises an array columns arranged on the bottom surface and the bottom surface, the filling material (3) fillsthe space between the array columns of the piezoelectric materials(2), the bottom surface of the piezoelectric material (2) serves as a radiating surface, the radiating surface of the piezoelectric material (2) is arranged on the backing material (4) outwards, the backing material (4) is connected with the transducer base (5), the cable (6) is connected with a positive electrode and a negative electrode of the piezoelectric material (2), the potting material (1) is used for encapsulating the connected piezoelectric material (2), the filling material (3), the backing material (4) and the transducer base (5). According to the method, the mode that the piezoelectric material is used for cutting and reserving the bottom is adopted, the bottom surface serves as the radiating surface, the effective radiation resistance of the transducer is increased, and the bandwidth and the receiving sensitivity of the transducer are improved.

The invention provides an adjacent netting semi-flexible connection method for a copper alloy mesh grid, relating to an aquaculture net cage netting connection method and needing to provide a netting semi-flexible connection method. A cylinder braid, a rope, a suture line and a tarpaulin ring are adopted. The connection method is characterized in that the cylindrical braid, the rope, the suture line and the tarpaulin ring are processed and assembled into a semi-flexible connecting member arranged between two adjacent copper alloy mesh grids, one end of the suture rope is fixed on a net junction at a distance of 3 meshes from the connecting part of the copper alloy mesh grids, the other end of the suture rope sequentially penetrates through eye rings of the semi-flexible connection member and net meshes on the copper alloy mesh grids, the eye rings of the semi-flexible connecting members and the net meshes of the copper alloy mesh grids are sutured and sewed in a suture ratio of 2:3, after the suture rope penetrates through all eye rings at one side of the semi-flexible connection member and corresponding net meshes on the copper alloy mesh grids, the suture rope is fixed on a net junction at a distance of 4 meshes from the connecting edge of the copper alloy mesh grids, and the semi-flexible connecting member is connected with the other copper alloy mesh grid of the two copper alloy mesh grids together by using the same method.

The invention provides a sliding vane pump and a method using the sliding vane pump to convey fluid. The sliding vane pump is provided with a cylindrical pump casing, and the pump casing is internally provided with a driving shaft, a rotor sleeved on the driving shaft, and a sliding vane arranged on the rotor, wherein the sliding vane and an inner cavity of the pump casing are sealed in a contact manner; an end cover is arranged at the end part of the pump casing; the sliding vane pump further has a sliding vane pump suction port and a sliding vane pump discharge port; and the sliding vane pump suction port and / or the sliding vane pump discharge port are located on the end cover of the pump casing. The invention further provides a sliding vane pump, and the sliding vane pump includes a plurality of cylindrical pump casing, and has a sliding vane pump suction port and a sliding vane pump discharge port; the sliding vane pump suction port and / or the sliding vane pump discharge port are respectively located on the end cover; and fluid transfer openings penetrating the upper end surfaces and the lower end surfaces of partitions are arranged on the partitions. According to the method using the sliding vane pump, the fluid is sucked and / or discharged in the direction of the end part of the pump casing so as to pump.

The invention belongs to the technical field of electric wires and cables and particularly relates to a cable mold. The cable mold comprises a mold core and a mold cover and is characterized in that: the mold core consists of a forming part, a transition part and a connection part; the forming part is positioned at the front end of the mold core; the transition part is positioned at the middle end of the mold core; the connection part is positioned at the rear end of the mold core; the forming part consists of conductor guide devices, isolating bar forming channels and filling body guide devices; the quantity of the conductor guide devices is equal to that of the isolating bar forming channels; and the mold core has an integrated structure. The invention has the advantages that: the cablemold is convenient to mount and easy to manufacture, processes of producing the cables can be reduced, the cables have higher production speeds, the produced cables have smaller diameters, and the cable mold has lower material consumption and lower cost.

The invention relates to the technical field of degradable materials, in particular to a degradable material and a preparation method thereof. The degradable material is prepared from the following raw materials in parts by weight: 10-20 parts of starch, 10-20 parts of polylactic acid, 1-5 parts of a compatilizer, 1-5 parts of a nucleating agent, 20-40 parts of PBAT resin, 1-3 parts of an inorganic filler, 4-12 parts of modified bamboo fibers, 1-5 parts of deacetylated chitin and 1-5 parts of a degradable additive. According to the degradable material disclosed by the invention, the deacetylated chitin and the modified bamboo fibers are used as antibacterial raw materials, the deacetylated chitin has good antibacterial activity, and meanwhile, the PBAT resin, the degradable additive and the nucleating agent are combined, so the prepared material has antibacterial properties and also has a very good self-degradation effect, and and good flexibility, bending strength and heat resistance; and compared with a pure PBAT material, the degradable material of the invention has the advantages that cost is reduced, no harm is caused to human beings and the environment and wide market prospects and good application value are achieved.

The invention discloses a firebrick dust-containing aerated building block and a making method thereof. The aerated building block is made from, by weight, 12-23 parts of silicon-calcium slag, 24-37 parts of firebrick dusts, 26-39 parts of Portland cement, 19-35 parts of gangue, 14-26 parts of anorthite, 18-32 parts of porous ceramsite, 28-42 parts of flue dust, 6-12 parts of locust bean gum, 10-15 parts of boron slag, 16-28 parts of blast furnace water quenching slag, 4-8 parts of sodium tripolyphosphate, 3-4 parts of silicon-aluminum alloy powder, 1-2 parts of sodium peroxide and a proper amount of water. The firebrick dusts added in the invention cooperate with gangue, anorthite and silicon-calcium slag to improve the mechanical performances, the acid and alkali corrosion resistance and the weatherability of the aerated building block, and cooperate with the porous ceramsite, the boron slag and the blast furnace water quenching slag to improve the fire resistance and the heat insulation property of the aerated building block. The aerated building block made in the invention has the advantages of excellent comprehensive performances, excellent mechanical performances, excellent weatherability, excellent acid and alkali corrosion resistance, excellent ageing crack resistance, excellent heat insulation property and excellent fire resistance.

The invention discloses a micro-stroke, double-redundancy torsion-preventive LVDT displacement sensor, and belongs to a displacement sensor. The sensor comprises first and second coil assemblies, a magnetic insulation pad, an iron core assembly, a sleeve, a casing, a leading-out wire and an end cap, the first and second coil assemblies and the magnetic insulation pad are mounted in the casing, one end of the iron core assembly is sleeved by the first and second coil assemblies and the magnetic insulation pad, the magnetic insulation pad is positioned between the first and second coil assemblies, the other end of the iron core assembly is suspended beyond the casing, one end of the sleeve is sleeved among the first and second coil assemblies and the magnetic insulation pad, the other end of the sleeve is suspended outside the casing, one end of the leading-out wire is lead out of the second coil assembly, penetrates the magnetic insulation pad and is fixed to the first coil assembly, and the other end of the leading-out wire penetrates out of the casing. The sensor has the advantages of double redundancy, torsion prevention, high stability and high withstand voltage.

The invention discloses a high-Tg high-thermal conductivity aluminium-based copper-clad laminate comprising a copper foil layer and an aluminium-based layer, and an insulating layer is coated between the copper foil layer and the aluminium-based layer. The copper-clad laminate is characterized in that the insulating layer contains the components in percent weight: 55-73 percent of epoxide resin, 0.06-0.20 percent of dimethyl imidazole, 10-22.94 percent of propylene glycol methyl ether and 10-22 percent of stuffing. The aluminium-based copper-clad laminate material has the characteristics of temperature resistance, pressure resistance and big coefficient of heat conductivity and can well satisfy the requirements of high-power aluminium-based copper plates.

The invention relates to the field of ground-wall construction processes and provides a construction method of using color concrete to cover an embossed surface. The construction method includes: step 1, cleaning the surface of base layer concrete; step 2, pouring binding mortar on the surface of the base layer concrete, and scraping flat; step 3, pouring surface layer concrete, namely pouring concrete slurry on a binder, spreading the concrete slurry flat, and performing scraping and press-polishing to form the surface layer concrete; step 4, embossing the surface layer concrete, namely when the surface layer concrete is not adhesive, spraying a liquid demolding agent on the surface of a mold and the surface of the surface layer concrete, flatwise placing the mold on the surface layer concrete, pressing to enable patterns of the mold to be printed on the surface of the surface layer concrete, and lifting up the mold after embossing; step 5, spraying pigment on the surface of the surface layer concrete; step 6, sealing the surface of the surface layer concrete. The construction method is simple in construction step, reasonable in design, simple and easy to implement and easy to operate.

The invention provides a semi-hard low-temperature resistant PVC cable material. The semi-hard low-temperature resistant PVC cable material is prepared from the following components in parts by weight: 100 parts of a PVC resin, 0-10 parts of dioctyl phthalate, 1-30 parts of terpolymer, 0-30 parts of calcium carbonate, 0.1-0.2 part of polyethylene wax, 0.1-0.2 part of stearic acid, 2-5 parts of a calcium-zinc composite stabilizer and 0.01-1 part of high-density oxidized polyethylene wax. The invention further provides a preparation method of the semi-hard low-temperature resistant PVC cable material. The preparation method of the semi-hard low-temperature resistant PVC cable material comprises the following steps that S1, each raw material is weighed according to the weight value of the formula, and the raw materials are added into a high-speed mixer for mixing and plasticizing; S2, the mixture is transferred to a double-screw extruder for extrusion processing, and extruding and granulating are carried out through a single-screw extrusion granulator; and S3, air-cooled conveying and packaging is carried out. The semi-hard low-temperature resistant PVC cable material can be used formanufacturing wire and cable sheathing layers and insulating layers with high product flexibility requirements, such as wind energy cables, photoelectric composite cables, elevator cables, and built-in wires of refrigeration equipment, and has good low-temperature resistance and high hardness.