62results about How to "Inhibition of convective heat transfer" patented technology

The invention discloses a full-vacuum horizontal liquefied natural gas (LNG) submerged pump pool. The full-vacuum horizontal LNG submerged pump pool comprises a pump pool body, a submerged pump pool and a support. A liquid outlet device which is arranged on the inner side of a pump pool cap is in a structure of high vacuum and heat insulation and an outer casing tube which is arranged on the outer side of the pump poop cap is fixedly connected with a vacuumized joint. The vacuumized joint is communicated with the liquid outlet device and the structure of high vacuum and heat insulation of the full-vacuum horizontal LNG submerged pump pool is formed by the vacuumized joint and a high-vacuum and heat-insulated interlayer between an outer cylinder and inner cylinder of the full-vacuum horizontal LNG submerged pump pool. According to this arrangement, all ways of heat leakage, such as convention, conduction and radiation can be eradicated so that good cold-insulated effect can be ensured. The rate of evaporation per day of LNG in the full-vacuum horizontal LNG submerged pump pool can be reduced by 21.5% to 31.5% compared with the vertical submerged pump pool in the prior art. The full-vacuum horizontal LNG submerged pump pool can be used for filling vehicles or transporting vehicle-mounted LNG, so as to greatly improve the economic benefit of LNG filling stations, LNG transportation and filling vehicles.

The invention belongs to the field of aqueous coatings and in particular relates to an ultrathin fireproof aqueous coating and a preparation method thereof. When the ultrathin fireproof aqueous coating is prepared, a component A and a component B are added, the component A comprises an aerogel precursor, stepless powder and the like, and the component B is used as a binding agent. The aerogel precursor is adopted as a core raw material to prepare the fireproof aqueous coating; as an aerogel material is of a nano three-dimensional structure and has characteristics that a solid heat conduction route is effectively prolonged, gas convective heat transfer is inhibited and thermal radiation is reduced, an aerogel fireproof coating made of the aerogel material has a thermal insulation property which is incomparable by conventional materials; after being applied to a steel material and dried, the ultrathin fireproof aqueous coating provided by the invention is relatively high in mechanical strength, achieves a fireproof grade A1, additionally has relatively good advantages of being waterproof and low in cost, and provides a novel material for buildings, environmental protection and industrial energy conservation.

The present invention provides a method for measuring the thermal conductivity of porous powder materials based on the principle of one-dimensional heat conduction. The powder sample to be measured is sandwiched between two samples with known thermal conductivity to form a sandwich structure and placed in a vacuum environment. The top of the sandwich provides a stable heat flow, and the thermocouple is welded equidistantly along the height direction on the surface of the known sample to measure the temperature, and the measured data is transmitted to the data acquisition instrument, and the temperature information obtained from the data acquisition instrument is analyzed by using LabVIEW software. The thermal conductivity of the sample to be tested can be calculated by curve fitting. The device is simple in structure, low in cost, simple in measurement method steps, and high in accuracy of measurement results, and can meet the thermal conductivity measurement requirements of powders with different particle sizes at different bulk densities.

The invention discloses a composite thermal insulation structure of a thermal battery and an application of the composite thermal insulation structure in the preparation of the thermal battery. The composite thermal insulation structure comprises a vacuum thermal insulation cavity, an aerogel thermal insulation layer, a reflection infrared radiation layer, a getter material and a battery cover plate, wherein a groove is formed in the side wall of the shell of the vacuum heat insulation cavity; the groove is formed in the upper end of the vacuum heat insulation cavity; the aerogel heat preservation layer is arranged in the groove and at the upper end of the vacuum heat insulation cavity; the reflection infrared radiation layer is arranged in the vacuum heat insulation cavity; the solution material is arranged at the bottom in the vacuum heat insulation cavity, and the battery cover plate is arranged at the upper ends of the vacuum heat insulation cavity and the aerogel heat insulation layer. The composite thermal insulation structure of the thermal battery provided by the invention can obviously delay the reduction of the temperature of an electric pile in the working process of thethermal battery and prolong the thermal life of the thermal battery.

The invention relates to a light high-efficiency multilayer heat insulation material and a preparation method thereof. The method comprises the following steps: (1) impregnating a fiber preform with sol to prepare an aerogel composite material; (2) wrapping and sewing the aerogel composite material prepared in the step (1) by using fiber cloth to obtain a thermal insulation material preform; and (3) bonding a reflection film on the surface of the thermal insulation material preform obtained in the step (2) to prepare the light high-efficiency multilayer thermal insulation material. The invention also provides the light high-efficiency multilayer heat insulation material prepared by the preparation method, and the material can carry out high-efficiency heat insulation protection on a targetstructure at room temperature -500 DEG C. The light high-efficiency multilayer heat insulation material and the preparation method thereof have simple preparation process and low cost, and are expected to be popularized and applied in the fields of low-temperature heat insulation and civil heat insulation in aerospace.

The invention discloses a high speed burner for a combustion chamber with a film cooling type corrugated shell structure, which relates to a high speed burner for a combustion chamber and aims to solve the technical problem of short service life of the combustion chamber shell of the conventional burner. The technical key points are that: the combustion chamber shell is a tapered shell of which the side wall is corrugated; the longitudinal section of the side wall of the combustion chamber shell has a corrugated structure; a plurality of gas film cooling holes are uniformly formed on the combustion chamber shell in a circumferential direction; the outer cover of a combustion chamber inner barrel is sleeved on the combustion chamber inner barrel; a combustion-supporting air sealed air cavity is formed between the outer cover of the combustion chamber inner barrel and the combustion chamber inner barrel; the outer cover of the combustion chamber shell is sleeved on the combustion chamber shell; a secondary air sealed air cavity is formed between the outer cover of the combustion chamber shell and the combustion chamber shell; a combustion-supporting air inlet is formed on the outer side wall of the outer over of the combustion chamber inner barrel; and a secondary air inlet is formed on the outer side wall of the outer cover of the combustion chamber shell. By adopting the corrugated tapered metal shell with the air film cooling holes, turbulence intensity can be increased, the heat exchange effect is improved, and the service life of the combustion chamber shell of the high speed burner is effectively prolonged.

The invention relates to a door structure of a coke oven, and particularly relates to an energy-saving door lining brick for a coke oven. The door lining brick includes a lining brick main body, a glaze surface, a web and fastening members. The lining brick main body is provided with at least one concave type hollow structure, and is provided with fastening member connecting holes. The glaze surface is hung on the external surface, in contact with coke, of the lining brick main body. The wed covers the concave type hollow structure. The upper surface of the lining brick main body is in close contact with the web. The web and the lining brick main body are fastened through the fastening members so that the concave type hollow structure becomes a sealed cavity. The bottom of the web is coated with a coating. Heat-reflecting coating having high reflectivity is adopted by the coating. The lining brick is a fire-resistant precast block lining brick, and has a height of 500-2000 mm. The lining bricks are arranged into a row up and down and are tightly mounted inside an oven door frame. The lining brick can greatly reduce the present oven door thickness, reduce the temperature of the external wall of an oven door, reduce heat loss and save energy.

The invention discloses a cryogenic storage tank with axial load bearing and limiting functions, and belongs to the field of cryogenic liquefied gas storage and transportation. The cryogenic storage tank comprises an inner container, an outer shell, a fixed part and a sliding part; the two sides of the inner container are axially erected in the outer shell through the fixed part and the sliding part; the spacing between the inner container and the outer shell, is not changed through the fixed part; the spacing between the inner container and the outer shell can be changed through the sliding part; and a covering sealing head enabling the fixed part to be sealed and a cover plate enabling the sliding part to be sealed are arranged on the two sides of the outer shell correspondingly. Due tothe cryogenic storage tank, damage to the inner container due to local stress concentration caused by low temperature shrinkage is avoided.

The invention discloses a vacuum insulating board made of a fiber reinforced nanometer powder material and a preparation method of the vacuum insulating board. The vacuum insulating board is composedof three parts of a core plate, a barrier film, a getter and a vacuum protection surface layer; and the core material is formed by continuous reinforced fibers and a nanometer silicon dioxide powder material, wherein the continuous reinforced fibers are selected from one or two of micro-glassfibers and carbon fibers. The preparation method comprises the following steps of preparing nanometer silicon dioxide into a wet gel solution by adopting a sol-gel method, then soaking the continuous reinforced fibers with the wet gel solution, then performing ageing, solvent exchange, modification treatment and pH regulation, finally, performing ambient pressure drying to prepare a fiber reinforced nanometer powder composite cotton felt material, and then adopting a stainless steel sheet to perform coating with a tailless vacuum technology to obtain the vacuum insulating board. The material expands the application field of nanometer silicon dioxide and can be used as thermal and sound insulation materials, fire-fighting fireproof and heat insulation materials and the like.

The invention discloses a fluid transportation measuring device, comprising a heat conducting frame, which is installed at the surface of the base, and provided with a pair of vertical brackets, wherein the brackets are provided with laterally opened buckle slots; a U-shaped sensing pipe, of which both ends in a horizontal middle part are respectively embedded in the buckle slots of two brackets and fixed to each other, wherein both ends of the bending part are respectively downwards crossed through the base in a sealing manner from the base surface, the horizontal middle part of the sensing oil is coiled with a sensing screw group; a pressing plate, which is installed at the base surface, and used or pressing the end part of a flat cable wire and fixing the end part on the base surface, wherein the flat cable wire is connected with a wiring head of the sensing screw group through a wiring terminal with an exposed end part; an outer cover, which is installed at the base surface, and used for covering the sensing pipe, the heat conducting frame and the pressing plate; the inner part of the outer cover is provided with a heat insulation type avoiding groove corresponding to appearances of the sensing pipe, the heat conducting frame, and the pressing plate. The fluid transportation measuring device can reduce the null shift, improve the anti-disturbing ability, reduce the sensitivity to the installing position, and realize the fluid transportation measurement with high precision and high response.

The invention relates to a solar flat-plate collector. A base plate is arranged at the opposite position of a cover plate, a support is arranged between the cover plate and the base plate, a cavity is formed by the support, the cover plate and the base plate, a header is arranged above the cavity, and a heating plate coated with a solar selective absorbing coating is installed in the cavity; a first insulating layer is arranged between one face of the heating plate and the base plate, the other face of the heating device is provided with a plurality of parallel copper heat pipes, evaporation sections of the copper heat pipes are connected with the heating plate, condensation sections of the copper heat pipes are arranged in the header, and the condensation sections of the copper heat pipes are in sufficient contact with pipe walls of runners; and the runners penetrate a cavity of the header, a second insulating layer is arranged in a gap in the cavity of the header, the cover plate is made of vacuum glass and hollow glass, and one face or two faces of the inner surface of the glass is/are plated with an infrared reflection film. The solar flat-plate collector is provided and relates to the field of solar equipment, the heat collecting efficiency of the collector can be improved, and the problems that scale and ice are prone to being formed in the pipes, and frosting is prone to generation on the cover plate are solved.

The invention belongs to the technical field of energy-saving and environment-friendly materials, and particularly relates to a building, silica aerogel fireproof, waterproof, environment-friendly thermal insulation paste for industrial energy conservation and thermal insulation and a preparation method of the paste. According to the thermal insulation paste, an aerogel precursor is added during preparation, silicon sol and organic silicon modified acrylic emulsion serve as binding agents, and the paste has the incomparable heat insulation performance compared with a traditional material. After the thermal insulation paste is dried, the high mechanical strength is achieved, and the fireproof A1 grade is achieved; besides, the paste has relatively good waterproof performance and low cost, and a novel material is provided for building energy conservation, environmental protection and industrial energy conservation.

The invention discloses a composite coating for a downhole oil pipe and an applying method thereof, and belongs to the technical field of oil field oil production. The composite coating for the downhole oil pipe comprises epoxy resin primer, an aerogel composite coating intermediate heat preservation layer and glass flake paint finish paint; an aerogel composite coating comprises, by weight, 10-20parts of silicon dioxide aerogel, 60-120 parts of a self-crosslinking acrylic emulsion, 15-30 parts of glass wool, 5-15 parts of titanium dioxide, 3-10 parts of hydroxyethyl cellulose, 10-30 parts ofsodium polyacrylate and 10-20 parts of ammonium hydroxide; and glass flake paint comprises, by weight, 40-50 parts of modified epoxy resin, 30-35 parts of glass flakes, 3-5 parts of a silane couplingagent, 5-10 parts of a diluent, 5-10 parts of alundum powder and 10-20 parts of an epoxy hardener. According to the composite coating for the downhole oil pipe, the problems that when an aerogel coating is applied to the downhole oil pipe, moisture absorbing and cracking under the influence of water are prone to occurring are solved.

The invention discloses a device for insulating a side wall of a directional solidified steel ingot. The device is characterized by comprising a water cooling base plate, an insulating material layer, a high-strength heat-resisting material layer, a heat-insulation air layer, a fire-resistant plate and a high-thermal-insulation heat-resisting material layer, wherein the water cooling base plate is arranged at the bottom of the device, the insulating material layer is covered on the surface of molten steel, the high-strength heat-resisting material layer is contacted with the molten steel and is positioned inside the device, the heat-insulation air layer is arranged in the middle of the device, the fire-resistant plate is inserted into the heat-insulation air layer, the high-thermal-insulation heat-resisting material layer is arranged at the outer side and upper surface of the device, and the whole side wall insulating device is sealed. The outer surface of the high-strength heat-resisting material layer and the inner surface of the high-thermal-insulation heat-resisting material layer are inlaid or coated with a low-blackness substance, and the surface of the fire-resistant plate is also inlaid or coated with the low blackness substance. By adopting the device disclosed by the invention, the heat transfer on the side wall can be obviously reduced, the side wall of a casting ingot is maintained to be in an adiabatic state, the formation rate of columnar crystals is improved, and the quality of a cast ingot is improved.

The treating process of metal material surface with uneven roller includes the following steps: making the rolling mold with uneven surface contact with the workpiece to be surface treated, making the rolling mold and the workpiece move relatively to produce plastic deformation in the surface of the workpiece repeatedly. The said treating process may be completed with available apparatus and technology in high reliability and controllable technological parameters. By means of control technological conditions, the present invention can obtain metal material with nanometer surface or self-alloying surface.

The invention belongs to the technical field of architectural ceramics, and particularly discloses a wood-grain-like ceramic tile with wood temperature touch and a preparation method of the wood-grain-like ceramic tile. The wood grain-like ceramic tile comprises a green body layer, a low-heat-conduction layer, a cover glaze layer, a wood grain glaze layer and a transparent glaze layer from bottom to top, wherein the low-heat-conduction layer is prepared from the following raw materials: ceramic powder, inorganic fibers and nano Al2O3-SiO2 aerogel powder. The preparation method comprises the following steps: taking raw materials of the green body layer, and carrying out dry pressing molding to obtain the green body layer; applying raw materials of a low-heat-conduction layer on the upper surface of the blank body layer, and performing dry pressing to obtain a low-heat-conduction blank body; and sequentially applying cover glaze, wood grain glaze and transparent glaze on the low-thermal-conductivity green body, and firing to obtain the wood grain-like ceramic tile. The low-heat-conduction layer is arranged on the surface of the green body layer, so that the ceramic tile has the temperature touch feeling of wood; the surface glaze layer, the wood grain glaze layer and the transparent glaze layer are sequentially arranged on the upper surface of the low-heat-conduction layer, so that the wood grain imitation effect is achieved, and the wood grain imitation ceramic tile with the wood temperature touch feeling is obtained.

The invention discloses an anti-frosting low-temperature surface source blackbody, which comprises a shell and a blackbody plate, a semiconductor cooler, a temperature control assembly, a heat dissipation assembly and a power module, which are arranged in the shell. The semiconductor cooler is electrically connected with the temperature control assembly, and the temperature control assembly and the heat dissipation assembly are both electrically connected with the power module; an anti-frosting assembly installed on the shell is arranged at the front end of the black body plate, and the temperature control assembly is suitable for being connected with an external computer and conducting calculation according to PID parameters to adjust the power of the semiconductor cooler. The low-temperature surface source blackbody can be effectively protected, surface frosting is avoided, and meanwhile the temperature accuracy and stability of the low-temperature surface source black body are improved.

The invention discloses a heat preservation device for an ice cream maker and an ice cream assembly. The heat preservation device comprises a base, a heat preservation sleeve and a water scraping ring, wherein a water collecting structure is arranged on the base and is used for allowing the ice cream maker to be placed and collecting condensate water of the ice cream maker; the heat preservation sleeve is connected to the base, and a containing cavity used for containing the ice cream maker is defined by the heat preservation sleeve and the base; the water scraping ring is arranged on the inner wall of the heat preservation sleeve, and is used for abutting against the outer wall of the ice cream maker to scrape water; and when the ice cream maker is located in the containing cavity, a heatpreservation cavity is defined by the outer wall of the ice cream maker, the water scraping ring, the inner wall of the heat preservation sleeve and the base. According to the heat preservation device, the heat preservation sleeve is arranged on the base, the heat preservation sleeve can achieve the effect of heat preservation while the base collects condensate water, the use efficiency of cold energy is improved, and besides, generation of the condensate water can be reduced.