275results about How to "Large specific heat capacity" patented technology

The invention relates to a planting device, and relates to a gastrodia elata planting tank which comprises a tank body, wherein a planting cavity, a water taking cavity and water storage cavities are sequentially formed from inside to outside inside the tank body; a first piston which can slide is arranged inside the planting cavity; a first air pressure cavity is formed below the first piston; second pistons which can slide are arranged inside the water taking cavity; second air pressure cavities are formed below the second pistons; the first air pressure cavity is communicated with the second air pressure cavities; quantitative water tanks are arranged inside the second pistons; water inlets are formed in side walls contacting the second pistons, of the water storage cavity; water outlets are formed in one sides facing to the planting cavity, of the second pistons; first through holes are formed in side walls contacting the second pistons, of the water storage cavities; second through holes are formed in side walls contacting the second pistons, of the planting cavity; a planting tank is arranged on the first piston; a water leaking hole is formed in a side wall of the lower end of the first piston. Due to the quantitative tanks, a certain amount of water can be fed into a medium, so that the medium can be prevented from excessive humidity, and the humidity of the medium can be controlled within 60-80%.

The invention relates to a magneto-rheological fluid brake, comprising a rotor, a stator, a sealing cover, and a transmission shaft, which is characterized in that a plurality of closed cavities filled with magneto-rheological fluid are arranged around the rotor; the stator is composed of an annular hollow housing, an annular fixed retainer, and an annular movable retainer; a plurality of permanent magnets uniformly distributed in circumferential direction with the same regularity are fixed on the inner side surfaces of the fixed retainer and the movable retainer; the fixed retainer and the movable retainer with permanent magnets are axially paralleled in the casing; a plurality of windows are uniformly distributed on the inner side surface of the casing; two axially adjacent permanent magnets belonging to the fixed retainer and the movable retainer respectively share the same window; a magnetic-inductive plate is embedded in each window; the fixed retainer and the movable retainer are made of magnetic conducive materials, and the other parts of the casing are made of non-magnetic materials. The magneto-rheological fluid brake has the advantages of realization of brake, power saving, convenient operation and actualization, reliable brake performance by adopting permanent magnets as magnetic source, and changing direction of closed magnetic circuit through rotation of the movable retainer.

The invention discloses a hydrocarbon continuous liquid phase hydrogenation process method which includes a gas-liquid mixing step, to be more specific, a liquid phase material flow is fully mixed with hydrogen to obtain a dissolved-hydrogen-saturated liquid phase material flow by use of a gas-liquid mixer; and a hydrogenation reaction step, to be more specific, the dissolved-hydrogen-saturated liquid phase material flow flowing into a reactor flows in the direction of from the top of the reactor to the bottom of the reactor for liquid phase contact reaction with every stages of catalyst bed layers, and at the same time, new hydrogen is injected into the liquid phase material flow by a hydrogen distributor so as to realize the efficient hydrocarbon reaction of the liquid phase material flow. The present invention also discloses a hydrocarbon continuous liquid phase hydrogenation device which includes one gas-liquid mixer and one multiplestage reactor, the multiplestage reactor is connected with the gas-liquid mixer, each stage of the reactor comprises at least two stages of catalyst bed layers, and one hydrogen gas distributor is arranged between adjacent catalyst bed layers,.

The invention provides a liquid-cooling radiator of a lamp. The liquid-cooling radiator comprises a lamp shell having an opening, a light source, a water-cooling block, a heat exchanger, a water tank, a water pump, and a water pipe. The inside of the lamp shell is divided into a closed first chamber and a second chamber having an opening, by a partition. The light source is disposed in the second chamber and fitted to the partition. The water-cooling block is disposed in the first chamber and fitted to the partition. The heat exchanger and the water tank are both fitted to the inner wall of the first chamber. The water pump is mounted on the water tank. The water pipe penetrates the water-cooling block and the heat exchanger; two ends of the water pipe are connected to the water tank. The heat exchanger is provided with radiating fins provided with a fan. The partition and the lamp shell are integrated; the first chamber is provided with a rear cover; the heat exchanger is mounted on the rear cover. The liquid-cooling radiator is high in radiating efficiency and easy to demount. The invention further provides the lamp comprising a reflector, a light-permeable plate and the radiator; the lamp is high in radiating performance; a high-power light source can be used; excessively high heat is prevented from burning out the light source or the circuit board and electronic components in the lamp.

The invention relates to a phase-transition self-temperature-regulating heat-preserving facing brick of an external wall, which is an integrated structure compacted by a phase-transition heat-preserving layer and an inorganic facing layer, wherein the phase-transition heat-preserving layer is mixed by proportion and compacted by hull-type expanded perlite heat-preserving aggregates, phase-transition temperature-regulating aggregates and cements; the inorganic facing layer is mixed by quartz sand, calcium carbonate, calcium oxide, cement and silicon oxide powders; and the phase-transition temperature-regulating aggregate is made of phase-transition cores and encapsulated hulls. The manufacturing method not only effectively solves the encapsulation problem of the phase-transition material, leads the prepared phase-transition self-temperature-regulating heat-preserving facing brick of the external wall to have excellent heat-preserving performance, waterproof performance and permanent anti-ageing performance, but also radically solves the obsolescence of thermo-physical property and the leakage problem of phase-transition material in the circulation process. The facing brick has the advantages of light weight, strong adhesion strength, large compressive strength, heat insulation, heat preservation, waterproof and moisture-proof performances, obvious energy-saving effect, and the like.

The invention relates to the field of tunnel construction, in particular to a permafrost region road tunnel peripheral hole blasting construction method. The method comprises the following steps of step 1, according to the grade of a tunnel peripheral rock, determining a digging way and the single-circulation advanced depth; step 2, according to the position of the designed digging outline of a tunnel, drilling holes in the periphery at set intervals; step 3, after drilling the holes, cleaning the holes; step 4, filling dynamite into each blast hole, and connecting a percussion cap and a detonating cord; step 5, filling NaCl solution into each blast hole and each shock-absorbing hole, wherein each hole opening is blocked by stemming; step 6, using a blasting way to arrange a blasting network by using area-by-area blasting, blasting the peripheral holes in hole wall position areas, and then blasting the peripheral holes in the arch top. When the tunnel peripheral holes are designed, an un-coupled dynamite filling structure is adopted, and a section-to-section blasting way, a millisecond blasting way and a shock-absorbing design are adopted, so that the blasting heat is reduced, the blasting temperature of the peripheral rock is reduced, the stability of the permafrost is guaranteed, the construction cost is reduced, and construction is simply, conveniently and quickly performed.

The invention provides a co-precipitation synthesis method for Na2 / 3Ni1 / 3Mn2 / 3O2 as an electrode material and a preparation method of a Na2 / 3Ni1 / 3Mn2 / 3O2 electrode. The co-precipitation synthesis method comprises the steps of (1) mixing a nickel source compound solution and a manganese source compound solution, then, violently stirring to prepare a mixed solution with the nickel-to-manganese molar ratio of (0.8-1.5):1, and meanwhile, adding a complexing agent to complex until the pH value of the solution is up to 7.5-8.5; (2) adding a precipitant for precipitating to obtain a precipitate, carrying out suction filtration on the obtained precipitate, washing and drying; (3) carrying out ball milling on the dried product and a sodium source compound with a stoichiometric ratio, and mixing for 3-10h; (4) placing the ball-milled mixture into a muffle furnace to pretreat and calcine at high temperature to obtain a final product, namely, Na2 / 3Ni1 / 3Mn2 / 3O2. Proved by an electrochemical test, the material provided by the invention has the specific discharge capacities of 195mAh / g (0.01C), 153mAh / g (0.05C), 84mAh / g (0.10C), 53mAh / g (0.20C) and 49mAh / g (0.50C) in a rate performance test. The co-precipitation synthesis method is wide in raw material source, easy to prepare, low in aqueous sodium ion electrolyte cost and friendly to environment.

The invention discloses treatment equipment for medical cryoplasty. The treatment equipment comprises a refrigeration device for providing a cold source, a liquid storage tank, a conveying pump and aheat exchanger, wherein the liquid storage tank is used for storing a liquid treatment working medium with a freezing point lower than a threshold value; the conveying pump is used for pumping the working medium in the liquid storage tank to a treatment working medium cycle; the heat exchanger is used for carrying out heat exchange to replace the cooling capacity of a cold source to the treatmentworking medium, so as to provide the treatment working medium cooled to treatment temprature to the cryoplasty, wherein the treatment working medium flowing out from the cryoplasty in the treatment working medium cycle can reflow back to the liquid storage tank. Compared with the prior art, the treatment equipment provided by the scheme provides the heat exchange cooling capacity to the liquid treatment working medium through a refrigeration cold source and a formation mechanism of the treatment cooling capacity is changed, so that the surgical safety and economical performance can be comprehensively improved.

An on-line cooling method using hydrogen in an optical fiber drawing process is disclosed by the invention, and comprises the following steps: an optical fiber coming out from a graphite furnace successively passes through a diameter gauge and a defect detector, and gets to a cooling pipe of a cooling device, and the drawing speed gradually rises; when the drawing speed reaches 300-500 mpm, a hydrogen recovery and purification device begins to work; when the drawing speed reaches 800 mpm, a hydrogen supplying device begins to work, hydrogen is filled into a gas cooling pipeline, and the optical fiber moves downward and drives the hydrogen to move downward, and the heat of the optical fiber surface is adsorbed by the hydrogen in the movement process; the hydrogen fully contacts the inner surface of the cooling pipe, and the heat is transferred to the cooling pipe; the heat adsorbed by the cooling pipe is taken away by a cooling water circulation device, and thus the whole optical fiber cooling process is achieved. The specific heat capacity of hydrogen employed by the on-line cooling method is higher than that of helium, and the cooling effect is better; and furtherly, hydrogen is a conventional gas and is convenient to supply, and thus the cost of manufactures is reduced.

The invention relates to a flexible body temperature sensing material and a preparation method therefor. The sensing material contains a flaky composite material, at least two flexible conductive fibers and a flexible coating, wherein the at least two flexible conductive fibers are in electrical conduction with the composite material separately, and the external surface of the composite material is coated with the flexible coating; and the composite material is a composite material of polyvinylidene fluoride and graphene. The flexible body temperature sensing material and the preparation method therefor have the following characteristics: (1) the graphene is adopted as a conductive material, so that the sensing material is low in consumption, low in cost, good in conduction effect and high in accuracy; (2) the polyvinylidene fluoride is adopted as a temperature responsive expansion body, so that the positive correlation is accurate, and particularly, the linear precision is more sensitive after carrying out partial irradiation; and (3) a polydimethylsiloxane flexible coating has the characteristics of being relatively easy to process, good compatibility with human bodies, and the like and is large in relative specific heat capacity and low in heat dissipating speed, so that body surface temperature can be more accurately measured; and meanwhile, polydimethylsiloxane is good in air permeability and good in flexibility, so that the improvement on comfort level of wearers and the accuracy of temperature measurement is facilitated.

The invention discloses a semiconductor overlaying low-temperature energy storage refrigeration device and a working method thereof. The semiconductor overlaying low-temperature energy storage refrigeration device comprises a compressor, a hot end energy storage heat exchanger, a liquid storage device, a throttle valve and a cold end energy storage heat exchanger, all of which communicate in sequence according to the refrigerating medium flow path. The cold end energy storage heat exchanger comprises at least one set of box type or shell-coiled pipe type cold end evaporator, and the hot end energy storage heat exchanger comprises at least one set of box type or shell-coiled pipe type hot end condenser. A semiconductor chilling plate is attached to at least one heat radiation plane of each of the cold end evaporators and the hot end condensers. Cold and hot end medium cavities for containing energy storage media are formed in the outer portions of the other faces of the semiconductor chilling plates. Cold and hot end medium temperature probes are arranged in the medium cavities correspondingly. Temperature probes and pressure probes are arranged between an outlet of the cold end energy storage heat exchanger and the compressor. According to the semiconductor overlaying low-temperature energy storage refrigeration device and the working method, the system internal stability and heat exchange efficiency are improved, and the energy consumption ratio is correspondingly reduced. By means of the energy storage media, the refrigerating fluid operation condition can be relatively stable, the energy storage device is flexible in configuration, and combination can be carried out according to the system size.

A hydrocarbon continuous liquid-phase hydrogenation process includes: hydrocarbon raw material and hydrogen are fully mixed through a gas-liquid mixer to form liquid-phase material flow saturated in dissolved oxygen, the liquid-phase material flow is sequentially in contact reaction with each level of catalyst bed liquid from top to bottom in a reactor containing at least two levels of catalysts, hydrogen is injected into a hydrogen distributor on the lower portion of each level of catalyst bed, and products are guided out from the reactor and subjected to subsequent treatment.

The invention relates to a method for simultaneously producing electronic-grade dichIorosilane, electronic-grade trichlorosilane and electronic-grade silicon tetrachloride. The method uses crude trichlorosilane as a raw material; and the method comprises the steps of first-stage dust removal, gas phase adsorption, first-stage light-component removal, first-stage heavy-component removal, disproportionation, addition of a complexing agent, second-stage dust removal, first-stage separation, second-stage separation treatment, second-stage light-component removal treatment, second-stage heavy-component removal treatment, third-stage separation treatment, third-stage light-component removal, third-stage heavy-component removal, fourth-stage light-component removal, and fourth-stage heavy-component removal. According to the method provided by the invention, the process route is based on a current process route of preparing electronic-grade dichIorosilane, steps are changed and adjusted, so that a requirement of purity of raw material trichlorosilane is reduced, and the electronic-grade dichIorosilane, the electronic-grade trichlorosilane and the electronic-grade silicon tetrachloride canbe simultaneously obtained; and the products have a less content of impurities such as metal impurities, chlorosilane impurities and boron impurities, and stable quality, and can meet the requirementsof large-scale integrated circuits.

The invention provides a rotor cooling structure which belongs to the field of motor cooling. A motor rotor is cooled as a whole by circulating pressed cooling oil fluid in the motor rotor. The motor rotor cooling structure comprises a high speed rotary joint, a ferrule-type pipe joint, a motor rotor body, a partially trepanned rotor shaft and the like. The high speed rotary joint comprises a bearing, a sealing ring and an external interface. The ferrule-type pipe joint comprises a ferrule, a nut, a joint body, a combined washer and the like. When aluminium casting is carried out at the corresponding position of the motor rotor body, a dummy shaft is used to cast an aluminum tube at the corresponding position of the rotor body, and a short circuit ring and the aluminum tube cast in the rotor body are cast into a whole body. A blind hole and a screw hole which fixes the ferrule-type pipe joint are arranged in the corresponding position of the partially trepanned rotor shaft. An oil collector comprises an oil collecting tank and a skeleton seal. According to the invention, the overall rotor body is cooled by the cooling oil fluid; the possibility of burning is reduced; the hidden danger of cooling fluid leakage is avoided; the vibration noise of a motor is reduced; and the service life of the motor is prolonged.

The invention relates to the technical field of electric vehicle power battery pack thermal management, in particular to an air and coolant coupled electric vehicle battery pack thermal management system. The system is combined with vehicle-mounted single batteries to be installed on a vehicle body, connected with an electronic control unit (ECU) of the vehicle and composed of a battery box, a phase change material, a battery box end cover, battery cooling modules, an air inlet duct guiding housing, air outlet duct guiding housings, thermocouples and a speed regulating fan; and one thermocouple and the speed regulating fan are installed at an air inlet of a battery box end cover, the thermocouples are installed at air outlets of the battery end cover, the thermocouples are connected with the electronic control unit (ECU) of the vehicle, and the ECU is connected with the speed regulating fan and controls the rotating speed of the speed regulating fan. According to the system, the temperature consistency between the surfaces of the vehicle-mounted single batteries and the vehicle-mounted single batteries is improved, and the thermal exchange speed between air and coupling cooling plates is increased; and then the high-temperature thermal dissipation capacity and the low-temperature thermal preservation capacity of the system are improved, and the good thermal dissipation effect can be always achieved under different working conditions.

The invention belongs to the field of asphalt concrete pavements and relates to a composite asphalt cooling pavement top layer and a construction method thereof. The construction method comprises following steps: S1, a thermal-resistant asphalt mixture is spread on the top layer of a pavement and then rolled; S2, after the thermal-resistant asphalt mixture rolled in S1 is cured, the upper surface of the thermal-resistant asphalt mixture is coated with a coating; S3, after the thermal-resistant asphalt mixture and the coating are cured, the composite asphalt cooling pavement top layer is formed. Pavement ruts, the urban heat island effect and permafrost subgrade defects can be overcome.

The invention discloses a micro-channel temperature control device and method for a nucleic acid detection amplification reaction, and relates to a micro-channel temperature control device and method.The device comprises a nucleic acid amplification reaction module, a heating / cooling module, a micro-channel cooling module and a microcontroller module, wherein the nucleic acid amplification reaction module and the micro-channel cooling module are respectively mounted on the upper surface and the lower surface of the heating / cooling module; the nucleic acid amplification reaction module comprises a reaction plate, reaction columns and reaction tubes; the heating / cooling module is attached to the bottom of the reaction plate, and heating / cooling and temperature control of the reaction moduleare achieved through the microcontroller module; the micro-channel cooling module comprises a micro-channel plate, a micro-channel cover plate, a liquid tube, a cooling fan, a condenser, a liquid storage device and a water pump; and thermocouples are arranged at outlets of the reaction columns, a thermoelectric refrigeration sheet and the condenser and used for collecting temperature signals. Anouter-layer thermal insulation material is not used, so that the temperature distribution uniformity is improved, the cost is reduced, and the production operation convenience is improved. The power of the thermoelectric refrigeration sheet is improved and the heating / cooling rate of the reaction module is improved.

The invention relates to an energy-saving variable-frequency industrial electric appliance control cabinet, and belongs to the frequency conversion control cabinet technical field. The energy-saving variable-frequency industrial electric appliance control cabinet comprises a cabinet body, one side of the cabinet body is provided with an opening and a door body closing the opening, cooling water pipes are respectively fixed on two side inner walls of the cabinet body, the side wall of the cabinet body far away from the opening is provided with a ventilation grating communicated with the outside, and the inner wall of the cabinet body far away from the opening is fixed with a heat conduction sheet; a circulating water tank is arranged at the bottom of the cabinet body, two ends of the cooling water pipe are respectively communicated with the circulating water tank, and circulating water pumps are respectively arranged at the water inlet end and the water outlet end of the cooling water pipe; the energy-saving variable-frequency industrial electric appliance control cabinet further comprises a temperature detection module and a temperature control module; the temperature detection module detects the temperature in the cabinet body, the temperature control module recognizes and judges a temperature detection signal, and when the detected temperature value is larger than a water cooling temperature set value, the temperature control module controls the circulating water pump to be started to work. In the daily use process, the heat dissipation efficiency of the interior of the cabinet body is high, and energy is saved.

The invention provides a sludge drying and incinerating process. According to the sludge drying and incinerating process, gas exhausted from a drying furnace is led into a hot air generating furnace and an incinerating furnace, so that the gas with a certain humidity is led into the hot air generating furnace and the incinerating furnace; the specific heat capacity of hot gas and high-temperature gas is improved, the thermal energy carried by the hot gas and the high-temperature gas is increased, and the thermal efficiency is improved. In addition, the gas exhausted from the drying furnace is burnt again in the hot air generating furnace and the incinerating furnace so that the thermal energy of retorting gas can be fully utilized, and smelly gas can be removed; the gas generated in the incinerating furnace can also enable the gas generated in the incinerating furnace to be led into the drying furnace to be burned when being led into the drying furnace, and the thermal energy carried by the gas exhausted from the incinerating furnace can be fully utilized. Through the mode, energy consumption in the whole drying and incinerating process is greatly lowered, and meanwhile the efficiency of drying and incinerating is improved.

The invention discloses an inner cooling damping heat-shrinkable tool bar device, relates to the field of cutting machining, and mainly aims to solve the technical problems of high cost, easiness in causing pollution, easiness in generating vibration of a tool and the like caused by jetting of cooling liquid into an interference fit area in the conventional heat-shrinkable tool bar. According to the technical scheme, the inner cooling damping heat-shrinkable tool bar device comprises a tool shank (5), a heat-shrinkable tool bar (3) and a tool (1), wherein a conical cavity structure which stretches outwards is arranged at the outer end of the tool shank (5); the heat-shrinkable tool bar (3) is connected with a screw hole formed in the inner end of the heat-shrinkable tool bar (3) by inserting a connecting screw rod (6) into a screw rod through hole from the inner end of the tool shank (5); the inner end of the tool (1) is arranged at the outer end of the heat-shrinkable tool bar (3) in a sleeving way through interference hermetical fit; a cooling liquid cavity (4) is formed by the hollow inner cavity of the heat-shrinkable tool bar (3) between the connecting screw rod (6) and the tool (1); cooling liquid is packaged in the cooling liquid cavity (4). The inner cooling damping heat-shrinkable tool bar device is easy to install, detach and extend, and has high interchangeability; the adaptability of the inner cooling damping heat-shrinkable tool bar device as a machining device is well enhanced. The inner cooling damping heat-shrinkable tool bar is mainly applied to the field of deep cavity machining in a cutting machining process.

The invention discloses a device for cooling optical fiber wires online by using hydrogen. The device comprises a cooling tube (2), a cooling air pipeline (10), a gas pipeline (8), a pump, a hydrogen recycling and purifying device (5), a hydrogen supply device (6) and a gas flow control device (7), wherein the cooling air pipeline (10) is coaxially arranged with the cooling tube (2); the gas pipeline (8) is communicated with the cooling air pipeline (10); the pump, the hydrogen recycling and purifying device (5), the hydrogen supply device (6) and the gas flow control device (7) are arranged on the gas pipeline (8) in sequence; sealing devices (4) are arranged between one end of the cooling air pipeline (10) and the cooling tube (2) and between the other end of the cooling air pipeline (10) and the cooling tube (2). The specific heat capacity of the hydrogen employed by the device is greater than that of nitrogen, so that the cooling effect is relatively good; in addition, the hydrogen is an ordinary gas which is very convenient to supply and is cheap, so that the cost of production companies is lowered.

According to a motion drag reduction shell of anunmanned underwater vehicle, the structure is simple and light, the maneuverability is extremely high, and a good drag reduction effect can be achieved in various complex marine environments; silicone rubber has excellent cold resistance, heat resistance and aging resistance and good thermal conductivity, and can adapt to various marine working environments; a solution in the interlayer of the shell comes from external seawater, and a liquid storage container and an additional solution do not need to be additionally arranged in the shell, so that space and cost are saved; the specific heat capacity of seawater is large, it can be guaranteed that the stable temperature difference between the surface of the shell and surrounding seawater is kept for a long time after heating, and the filling solution is extremely high in cost performance; through surface drag reduction, strict size limitation is avoided, the original design appearance of a navigation body cannot be damaged through surface drag reduction, the hydrodynamic characteristic can be guaranteed, and therefore the surface drag reduction device is suitable for most unmanned underwater vehicles.

The invention relates to a sludge two-grade united energy-saving drying device and a sludge two-grade united energy-saving drying method. The sludge two-grade united energy-saving drying device includes a steam generator, a heater, a direct stirring dryer, a blower, a cyclone dust collector, a filter, a steam compressor, a valve, a sludge pump, an indirect sludge dryer and a spiral feeder. The sludge pump, the direct stirring dryer, the spiral feeder, and the indirect sludge dryer are formed to be a material access; the steam generator, the heater, the direct stirring dryer, the blower, the cyclone dust collector, the filter, the steam compressor, and the valve are formed to be a first-grade drying gas flow access; the valve and the indirect sludge dryer are formed to be a secondary-grade drying gas flow access. The invention has the beneficial effects of crossing through a sludge viscous zone through a two-grade drying method, and solving the viscous problem caused by high water content of sludge in indirect drying; besides, residual steam is used as the hot source for the next-grade drying, the potential heat and a part of sensible heat of the excessive steam can be generated during the recycling and drying processes, and thus the gradient utilization of energy can be realized.

The invention discloses a thermal insulation structure of a building, which comprises a wall body, a solar photovoltaic panel arranged on the outer surface of the wall body, and a battery, a water pump and a circulating water pipe connected with the solar photovoltaic panel, wherein the battery is electrically connected with the water pump; the wall body comprises a structure layer, a thermal insulation layer and a filling layer sequentially arranged from inside to outside; part of the circulating water pipe is arranged in the filling layer; one end of the circulating water pipe passes out ofthe filling layer and then passes through the ground to be connected with a water inlet end of the water pump; and the other end of the circulating water pipe passes out of the filling layer and is then connected with a water outlet end of the water pump. Water has a large specific heat capacity, the circulating water pipe is used to cool the wall body, and in comparison with the arrangement of the thermal insulation layer in the wall body purely, the cooling efficiency is higher; besides, in summer, the underground temperature is lower than that of the surface, in winter, the underground temperature is higher than that of the surface, after water in the water pipe flows underground to perform heat exchange with the underground, water temperature reduction effects are achieved in summer, water temperature rising effects are achieved in winter, water flows back to the wall body through the underground again and performs heat exchange with the filling layer, and the purpose of efficientthermal insulation is achieved.

The invention discloses 3D printing metal powder and a preparation method thereof and relates to the technical field of metal materials. The 3D printing metal powder disclosed by the invention adoptstitanium alloy powder, nickel powder and chromium powder which are different in particle size and proportion as raw materials; ultrasonic water atomization is adopted for preparing the metal powder; the high frequency of ultrasound is beneficial for achieving a cavatition effect in molten metal so that the molten metal is uniformly split into small liquid drops; the preparation method is combinedwith a water atomization method; on one hand, the relatively large specific heat capacity and the high cooling speed of water are beneficial for industrial large-scale production; on the other hand, water is used as a medium, which is beneficial for reducing the generation rate of hollow powder and satellite powder; the prepared powder is good in compression formability; the strength of a printedfinished product is enhanced; meanwhile the final annealing treatment reduces the oxidization effect of oxygen in water to metals; and the overall preparation method is simple and is low in energy consumption.

The invention discloses a municipal greening isolation fence. The municipal greening isolation fence comprises an upper transverse handrail, a lower transverse handrail and a plurality of parallel vertical handrails positioned between the upper transverse handrail and the lower transverse rail, wherein two opposite sides of the vertical handrails are connected with isolation plates of which the upper and lower ends are closely connected to the upper transverse handrail and the lower transverse handrail respectively; one side of two isolation plates is provided with a positioning plate, and the other side is provided with an elastic plate; the upper and lower ends of the positioning plates are closely connected to the upper transverse handrail and the lower transverse handrail respectively; the upper and lower ends of the elastic plates are closely connected to the upper transverse handrail and the lower transverse handrail respectively; gaps between the elastic plates and the isolation plates are filled with water; gaps between the positioning plates and the isolation plates are filled with gas; a through hole communicating both sides of the isolation plates is formed between the isolation plates. The municipal greening isolation fence has the beneficial effect that the buffering ability of the isolation fence can be enhanced, thereby reducing damage to the isolation fence and wear of the vehicle surface.

The invention discloses a container with an inner heating casing. A heating pipe consists of an inner casing and an outer casing which are coaxially sheathed, wherein heat conducting medium fills between the inner casing and the outer casing. Therefore, when the inner casing is heated, heat of the inner casing is transferred to the outer casing through the heat conducting medium layer, and then the outer casing transfers the heat to modified asphalt which is in direct contact with the outer casing; since the specific heat capacity of the heat conducting medium layer is higher and the temperature rise speed is lower than that of the outer casing, the temperature of the outer casing can be more easily controlled by controlling the temperature of the heat conducting medium layer; since the heat conducting medium layer is arranged and the temperature of the outer casing is stable, the temperature of the modified asphalt in a tank body can be stably controlled within a temperature interval in which the modified asphalt is not easily segregated, the fluidity is good and the asphalt is not solidified, the technical problems that the modified asphalt is segregated and decomposed at high temperature and is easily solidified at low temperature and the modified asphalt close to the heating pipe is easily aged are avoided, and the quality of the modified asphalt is guaranteed.

The invention discloses an atomizing chamber cooling circulation system and a method adopting the system to cool an atomizing chamber. The system comprises a heat absorbing structure, a cooling device, a circulating power pump, a heat conducting medium and a heat conducting medium delivery pipe, wherein the heat conducting medium delivery pipe is sequentially connected with the heat absorbing structure, the cooling device and the circulating power pump to form a heat conducting loop, and the heat conducting medium circularly flows in the heat conducting loop under the effect of the circulating power pump. The heat absorbing structure is located in a chamber body of the atomizing chamber and used for absorbing heat in the atomizing chamber and is provided with a heat absorbing cavity for the heat conducting medium to pass through. The cooling device is located outside the atomizing chamber and used for reducing the improved temperature of the heat conducting medium absorbing heat of the atomizing chamber. The atomizing chamber cooling circulation system has the advantages that the temperature reducing speed in the atomizing chamber is improved in the spray forming process to obtain ingot blanks with mechanical performance meeting the requirement.