52results about How to "Function as an air barrier" patented technology

A magnesium and magnesium alloy composite protection fire-retardant covering flux and its manufacturing method are provided. The chemical components of the covering flux are as follows (by weight): 50% to 70% of magnesium chloride, 8% to 18% of potassium chloride, 7% to 16% of sodium chloride, 1% to 8% of calcium chloride,1% to 8% of calcium fluoride,1% to 7% of magnesia, 1% to 5% of fluxing medium cryolite, 0.5% to 6% of carbonate foaming agent, 0.5% to 4% of beryllide fire retardant. The flux provided by the invention has excellent flame retardant property.

The invention belongs to the field of environment sanitation facilities, and particularly relates to a water collecting type inflaming retarding garbage can. The water collecting type inflaming retarding garbage can comprises a base, the upper end of the base is fixedly connected with a can body, a can cover is rotatably connected into the can body, a water storage cavity is formed in the base, anannular water collecting groove is formed in the upper end of the base, and communicates with the water storage cavity through multiple water conveying channels, multiple water sucking pipes are arranged on the side wall of the can body in a penetrating manner, the input ends of the water suction pipes are attached to the bottom face of the water storage cavity, the output ends of the water suction pipes are arranged on the inner side wall of the can body, multiple Z-shaped air exhaust channels are formed in the inner side wall of the can body, two ends of the Z-shaped air exhaust channels are arranged on the inner and outer side walls of the can body, an annular cavity is formed in the inner side wall of the can body, a piston ring is in sliding seal connection into the annular cavity, and the interior of seal space formed by the lower side wall of the piston ring and the annular cavity is filled with evaporation liquid. Collected rainwater is used for achieving fire extinguishing ofthe garbage can, and the garbage can is energy-saving, environment-friendly, high in speed and capable of avoiding large danger.

The invention discloses a method for preparing a modified aliphatic ester plasticizer. Aliphatic methyl ester (or ethyl ester) is subjected to epoxidation reaction and then subjected to chlorine addition and chlorine substitution reaction, the tail gas is treated by adopting a secondary tail gas absorption device, and a calcium chloride byproduct (a water treatment agent) is manufactured. The method has the advantages that: the process is clean; and the modified aliphatic ester plasticizer has the properties of epoxy groups and chlorine ions, and has the properties of light resistance, heat resistance, stability and flame resistance as a plasticizer product. The product of the invention can be widely applied to polyvinyl chloride (PVC) tubes, profiles, PVC films and artificial leather polyurethane (PU) products with flame-resistant requirements, and plays a good role in resisting flame and plasticizing.

The invention discloses a coating material for preventing a submersed nozzle from nodulation and a preparation method thereof, and belongs to the technical field of coating materials of submersed nozzles. The coating material comprises the following components in parts by weight: 20-56 parts of mullite fine powder, 15-23 parts of corundum fine powder, 4-8 parts of Guangxi white mud, 7-18 parts ofactivated aluminum oxide micro powder, 5-8 parts of aluminum dihydrogen phosphate, 8-12 parts of a fluxing agent, 2-11 parts of an antioxidant and 0.3-2.0 parts of a dispersing agent. The invention aims to solve the problems that in the prior art, a submersed nozzle is easy to bake and oxidize, and nodules are generated to block the submersed nozzle. According to the coating material for preventing the submersed nozzle from nodulation and the preparation method thereof, the purposes of preventing the submersed nozzle from being baked and oxidized and preventing air from entering molten steel through the nozzle in the using process can be achieved, and the submersed nozzle is prevented from blocking caused by nodulation.

A device for acquiring and storing a sediment pore water sample comprises a main body and sampling grid chambers, wherein a group of horizontal grooves are distributed on the main body in a grid manner, a 0.45mum aperture permeation membrane is covered on the surface of the main body, the periphery of the permeation membrane is fixed by a frame on the main body, and the grooves are filled with water to form the sampling grid chambers with a length 10-30mm, a width 1mm, a volume 10-30muL and an interval 1.0mm. The device is vertically inserted into sediment and taken out when ion diffusion is balanced, and the pore water sample in the sampling grid chamber is cooled into ice and freezing-stored under the air isolation condition. After the device is taken out, defreezing is carried out at room temperature under the air isolation condition, and the permeation membrane is pierced to get the pore water sample sucked out from the sampling grid chamber for analysis. The inventive device and method have pore water collection vertical resolution 2mm and balance time 1-3 days in sediment, and the pore water sample can be stored in the device for at least three months.

The invention discloses a building power cable rubber material, and a preparation method thereof. According to the preparation method, silicone rubber and chlorinated polyethylene are subjected to plasticating so as to obtain plasticated rubber; zinc oxide, magnesium oxide, stearic acid, polyisobutylene, zinc methacrylate, and boric acid are added into the plasticated rubber, and an obtained mixture is subjected to first mixing so as to obtain a first mixed rubber compound; white carbon black and calcined clay are added into the first mixed rubber compound for second mixing so as to obtain a second mixed rubber compound; vulcanizing agent DCP, vulcanizing auxiliary agent TMPTMA, anti-aging agent RD, a coupling agent, Sb2O3, chlorinated paraffin, and Mg(OH)2 are added into the second mixed rubber compound for third mixing so as to obtain a third mixed rubber compound; the third mixed rubber compound is cooled so as to obtain the building power cable rubber material which possesses high strength and flame resistance.

The invention discloses a flame retardant CPVC-ABS (Chlorinated Polyvinyl Chloride-Acrylonitrile Butadiene Styrene) alloy material which is prepared from the components in parts by weight: 40-80 parts of CPVC, 10-50 parts of ABS, 1-10 parts of a flame retardant and 1-8 parts of a processing agent. The invention further discloses a preparation method of the flame retardant CPVC-ABS alloy material. Compared with the prior art, CPVC in the alloy material disclosed by the invention combusts to generate HCl which can shield and dilute combustible gases. Antimonous oxide or (and) sodium antimonite in the initial combustion period is fused on the surface of the material to form a protective film to isolate air. In a high temperature state, antimonous oxide or (and) sodium antimonite is gasified to dilute oxygen concentration in air and is commonly used with CPVC to generate SbOCl and SbCl3, so as to have the flame retardant effect. The alloy material is less in use level and good in flame retardant effect.

The invention relates to an argon-blowing prefabricated member for a continuous casting tundish cover and belongs to the technical field of ferrous metallurgical equipment. Argon-blowing prefabricated members with difference sizes can be designed according to the size of a baking hole, a charging hole, a plug hole and the like of the tundish cover. The argon-blowing prefabricated member comprisesa prefabricated member body; the argon-blowing prefabricated member body has a shape of a cone of which the radius of the upper bottom is greater than that of the lower bottom, or the longitudinal section structure of the prefabricated member body is T-shaped. The prefabricated member body is hollow, an aeration pipeline is arranged in the prefabricated member body, and the prefabricated member body is provided with an aeration hole communicated with the aeration pipeline. The argon-blowing prefabricated member solves the problems that the peripheries of the baking hole and the plug hole are deformed and refractory materials fall off, and guarantee the cast-on can be performed smoothly; and the tightness of the tundish cover is improved, the reduction of the molten steel temperature is inhibited, the molten steel is prevented from being oxidized for secondary time, and meanwhile, the service life of the tundish cover can be prolonged.

The invention discloses a waterproof anti-flaming photovoltaic coiled material. The photovoltaic coiled material sequentially comprises a transparent waterproof layer, a flexible photovoltaic module layer and a waterproof coiled material layer from top to bottom, and all layers are connected through grapheme modified epoxy adhesives. The transparent waterproof layer is a modified PE permeable film; the flexible photovoltaic module layer comprises a flexible thin film photovoltaic module, an ethylene-tetrafluoroethylene copolymer film layer and a graphene-silicone-modified polyacrylamide coating layer; and the waterproof coiled material layer sequentially comprises a reflecting film, a waterproof anti-flaming layer, a glass fiber mat layer and a self-adhered SBS modified asphalt layer fromtop to bottom, and the surface of the modified asphalt layer is provided with a PE protection layer. The waterproof anti-flaming photovoltaic coiled material is good in waterproof and anti-flaming performance, can fully realize the role of photovoltaic power generation, the production cost of the coiled material is low, the use is convenient, and the coiled material is suitable for popularizationand application.

The invention relates to a flame-retardant graphene and polyurethane composite foam material. The material is prepared from, by mass, 10-30% of polyether polyol, 10-30% of polyester polyol, 40-50% ofisocyanate, 2-8% of a foaming agent, 0.5-5% of a foaming catalyst, 4-8% of a graphene-inorganic salt flame retardant and 1-4% of a foam stabilizer. The invention also discloses a preparation method ofthe material. The material of the invention has the advantages of good flame retarding effect, good mechanical properties, safety, non-toxicity, low cost and simple preparation process, and can meetlarge-batch production.

The invention discloses a multi-segment combined nitrogen control method of high-strength microalloyed steel. The multi-segment combined nitrogen control method comprises the following steps: a converter vanadium extracting process, a converter melting process, an LF (Ladle Furnace) refining process and a slab continuous casting protective casting process; the content of finished steel of the microalloyed steel is less than or equal to 0.005 percent. According to the multi-segment combined nitrogen control method disclosed by the invention, a slag layer with a certain thickness is formed on the surface of molten steel, so that a function of isolating air is obtained; a mode of firstly adding alloy materials with weak deoxidizing capacity and then adding alloy materials with strong deoxidizing capacity is adopted, so that the phenomenon of nitrogen increment caused by contact between the molten steel with the air due to a strong deoxidizing reaction in a steel ladle is prevented from happening; after tapping is ended, a steel ladle car can be driven to an argon blowing operation station, argon blowing and stirring can be carried out for 2 minutes, and the content of O in the molten steel is regulated to be less than or equal to 0.002 percent; the electric heating time is controlled through LF refining, calcium carbide is added in batches during a refining and heating process, so that furnace slag can be formed into good foam slag, the foam slag covers the surface of the molten steel to form a protective layer, and direct contact between the air and the molten steel is isolated. Through combined control of the processes, the microalloyed steel is finally obtained, and the content of N in the finished steel of the microalloyed steel is less than or equal to 0.005 percent.

The invention relates to the technical field of power distribution cabinets, in particular to a power distribution cabinet with a flame-proof function, which comprises a cabinet body, a base fixed at the bottom of the cabinet body and a cabinet door hinged with the cabinet body, a plurality of heat dissipation holes are uniformly formed in one side surface of the cabinet body, and flame-retardant plates for blocking the heat dissipation holes are arranged on the inner sides of the heat dissipation holes. Vertically-arranged L-shaped guide rails are arranged on the two sides of the flame-retardant plates correspondingly, limiting assemblies used for limiting the positions of the flame-retardant plates are arranged on the upper sides of the L-shaped guide rails, positioning assemblies used for limiting the positions of the flame-retardant plates are installed on the lower portions of the back faces of the two L-shaped guide rails, and a horizontally-arranged supporting plate is fixedly connected to the lower ends of the L-shaped guide rails; an inert gas tank is arranged on the lower side of the supporting plate, and a sealing assembly is installed in the middle of the upper surface of the inert gas tank, and compared with the prior art, the cabinet has the following advantages that the effect of isolating air is achieved, and external air is prevented from continuously entering the space formed by the cabinet body and the cabinet door.

The invention relates to a sealing pyrolyzing furnace achieving continuous feeding and discharging. The furnace comprises a screw feeder, a feeding bin, a pyrolyzing furnace cylinder, a discharging bin and a screw discharge bin which are sequentially connected in the material conveying direction, the feeding bin and the discharge bin are fixedly arranged on a rack, the pyrolyzing furnace cylinderis supported on the upper portion of the rack through multiple rollers, the outer wall of the pyrolyzing furnace cylinder is sleeved with a gear ring, the rack is provided with a driving mechanism driving the pyrolyzing furnace cylinder to rotate along the central axis through the gear ring, one end of the pyrolyzing furnace is communicated with the feeding bin, the other end of the pyrolyzing furnace is communicated with the discharge bin, a heating pyrolyzing mechanism is arranged in the middle of the pyrolyzing furnace and comprises a combustion chamber located on the lower portion and a pyrolyzing chamber located on the upper portion, openings allowing the pyrolyzing furnace to penetrate through are formed in the left side and the right side of the pyrolyzing chamber, and elastic sealing structures preventing air leakage are arranged on the joints of the pyrolyzing furnace cylinder and the feeding bin, the discharge bin and the pyrolyzing chamber. The sealing pyrolyzing furnace hasthe advantages that the structure is reasonable, continuous feeding and discharging can be achieved, the sealing effect is good, the safety is good, and the pyrolyzing efficiency is high.

The invention relates to a refining cover for a continuous casting tundish and a manufacturing method of the refining cover. The refining cover comprises an outer arc plate, an inner arc plate and a dipping cover. A circulation seam is reserved between the outer arc plate and the inner arc plate, and communicated with a gap between a tundish cover and a steel slag layer inside the tundish. Air exhaust holes penetrating through the dipping cover are formed in the dipping cover, through holes opposite to the air exhaust holes are formed in the inner arc plate, the air exhaust holes are communicated with the circulation seam through the through holes, argon is blown in through air curtain ventilation bricks, an air curtain barrier with the large continuous intensity is formed between the air curtain ventilation bricks and the dipping cover, the inclusions are captured and are adsorbed and removed by the steel slag layer, the argon breaks through the steel slag layer below the dipping cover to move upwards continuously and enters the circulation seam through the air exhaust holes and the through holes, the argon enters the position above the steel slag layer of the tundish through the circulation seam, and argon seal is formed in the space between the steel slag layer inside the tundish and the tundish cover. The steel slag face is protected, secondary oxidation of liquid steel is avoided, the 0.5 level of the four kinds of inclusions in LHG2 steel reaches more than 90%, and the cleanliness of the liquid steel is greatly improved.

The invention discloses a photovoltaic cable with electromagnetic shielding effect and a preparation method thereof. The photovoltaic cable includes a wire core formed by twisting a plurality of tinned copper wires and a protective layer covering the wire core. The protective layer is from the inside to the outside. It is an electromagnetic shielding layer, an insulating protective layer and a wear-resistant and waterproof layer in sequence; the preparation method includes: firstly preparing the electromagnetic shielding layer material and the wear-resistant and waterproof layer material; Extrude the 180°C halogen-free flame-retardant photovoltaic cable irradiated insulating material onto the electromagnetic shielding layer, and carry out irradiation cross-linking to form an insulating protective layer; evenly coat the surface of the insulating protective layer with a wear-resistant and waterproof layer, dry, That is, the photovoltaic cable is obtained. The photovoltaic cable of the present invention not only has good electromagnetic shielding effect, but also has good flame retardancy and water resistance, greatly improves the service life of the photovoltaic cable, and has good application value and prospect.

The invention discloses a photovoltaic coating for improving solar energy conversion and a preparation method thereof. The coating is prepared from acrylic modified silicone resin, silica sol, polyethylene terephthalate, graphene, butyl titanate , nano titanium dioxide, nano silicon dioxide, single crystal silicon, photopolymerization catalyst, polyisocyanate, modified attapulgite clay, metal nanoparticles and antifoaming agent. The above components are reacted and uniformly mixed according to a certain ratio, and the photovoltaic coating is obtained. The coating not only has better waterproofperformance, aging resistance and electrical conductivity, but also can effectively improve the conversion of solar energy into electric energy, and provides a good application prospect for the development of solar photovoltaic materials.

The invention discloses a flame retardant and an antiflaming medium-density and high-density fiber panel containing the flame retardant. The flame retardant comprises, by weight, 40-90 parts of ammonium polyphosphate, 5-50 parts of expanding agents and 5-20 parts of boride. The flame retardant is in a powder shape, is efficient expansibility flame retardant and has the advantages of being good in thermal stability, high in flame retardant efficient and low in cost. When the antiflaming medium-density and high-density fiber panel is made, the flame retardant can be directly applied to a fiber conveying pipeline and is uniformly mixed with suspended fibers in the pipeline through the action of air flow, original production procedures are seldom changed, and the problems that an existing antiflaming medium-density and high-density fiber panel is high in cost, the flame retardant addition quantity is large, energy consumption is large during drying and moisture absorption of the fiber panel is high are solved.

The invention discloses a high flame-retardant waterproof wire and a preparation method thereof, belonging to the technical field of wires and cables. The high flame-retardant waterproof wire includes a wire body, an electrostatic shielding layer, and a flame-retardant protective layer from the inside to the outside. The electrostatic shielding layer is a polyethylene terephthalate/graphene nanocomposite material layer. The flame-retardant protective layer is a graphene-modified polyurethane coating, and the wire body is a highly flame-retardant polyolefin wire. The preparation method includes: (1) preparing highly flame-retardant polyolefin wires; (2) coating polyethylene terephthalate/graphene nanocomposite on the surface after cooling the prepared highly flame-retardant polyolefin wires The material is dried; (3) the surface of the wire in step (2) is coated with a graphene-modified polyurethane coating, and dried. The electric wire of the present invention has good flame-retardant effect and excellent waterproof performance, and improves the use safety of the electric wire. The preparation method has simple process, mild conditions and good application prospect.

The invention provides a preparation method of a flame-retardant modified polyester fabric. The preparation method comprises the following steps of S1, modifying a polyester fabric; S2, preparing low-molecular-weight open-loop sodium hyaluronate; S3, preparing a modification solution: preparing a silk peptide solution and a sodium hyaluronate mixed solution, then adding citric acid and sodium hypophosphite, and performing uniform mixing; S4, padding and finishing the fabric: adding the modified polyester fabric prepared in the step S1 into the modification solution, and carrying out padding and baking treatment; and S5, performing flame-retardant modification of the fabric: dipping the fabric treated in the step S4 in a CaCl2 solution for constant-temperature water bath treatment, performing baking, putting the treated fabric in a SbCl3 solution for constant-temperature water bath treatment, taking out the fabric from the solution, and performing baking to obtain the flame-retardant modified polyester fabric. A preparation method of a phosphorus-containing flame-retardant fabric in the prior art is improved, and the flame-retardant modified polyester fabric is obtained through a composite modification method.

The invention provides magnesium alloy smelting protection solvent and a preparation method thereof. The magnesium alloy smelting protection solvent comprises the following chemical components in parts by weight: 8-15 parts of barium carbonate, 12-15 parts of calcium sulfate, 12-17 parts of nanometer zirconium oxide, 12-15 parts of magnesium chloride, 12-20 parts of hydroxyapatite, 12-20 parts of magnesium silicate, and 1-5 parts of lithium chloride. The preparation method is to perform the mixing after the drying. The smelting protection solvent, provided by the invention, is molten to a liquid state in an environment of higher than 500 DEG C in the smelting process, and is spread on the surface of an alloy or molten magnesium to achieve an air isolating effect and to stop the magnesium oxidation so as to obtain excellent protection performance.