41results about How to "Improve antifreeze ability" patented technology

The invention discloses a switching-on mechanism of a high-voltage isolation switch. The switching-on mechanism comprises a static contact component and a moving contact component, the static contact component comprises a current-conducting plate and a static contact, and one end of the static contact is fastened on the current-conducting plate. The moving contact component comprises an annular moving contact, the annular moving contact is arranged on the inner wall of an upper conductive tube of the isolation switch, and the outer wall of the static contact is sleeved with the annular moving contact under the motion of the upper conductive tube to achieve switching on. The static contact component and the moving contact component are each provided with a sealing component, and the sealing components enable the static contact component and the moving contact component to be isolated from the outside air. The switching-on mechanism of the high-voltage isolation switch is simple in structure and reliable in motion and has the contamination and freezing prevention functions.

The invention provides a low-temperature leakage detecting liquid used for air tightness detection of a liquid propellant storage and transportation device. The raw constituents of the low-temperature leakage detection liquid are water, a low-temperature solvent, a surfactant, SDS (Sodium Dodecyl Sulfate) and disodium hydrogen phosphate; the raw constituents are mixed uniformly according to a proportion to form the low-temperature leakage detecting liquid. The low-temperature solvent is ethanol or ethylene glycol; the surfactant is any one of octyl alkylphenol polyoxyethylene ether, nonyl phenol polyethenoxy ether and phenethyl phenol polyoxyethylene ether; the SDS serves as an additive agent for improving stability of bubbles, and the disodium hydrogen phosphate serves as a corrosion inhibitor. The low-temperature leakage detecting liquid can be used for air tightness detection of the liquid propellant storage and transportation device in an environment at 0 to -50 DEG C, is strong in bubbling capability, good in air bubble stability and strong in anti-freezing capability, can efficiently solve the problem that a common leakage detecting liquid when being used in a low-temperature environment is frozen, and improves leakage detection reliability and operation safety of the liquid propellant.

The invention discloses a telescopic anti-freezing full-physical crosslinked hydrogel material for a multi-mode flexible sensor and a preparation method thereof. The hydrogel material is an ionic conductor with a full-physical crosslinked structure and comprises a poly-N-hydroxyethyl acrylamide hydrogen bond network and a chitosan ion crosslinked network. N-hydroxyethyl acrylamide, chitosan and aphotoinitiator are taken as raw materials, and ultraviolet radiation curing and saline solution soaking crosslinking are carried out to obtain the poly-N-hydroxyethyl acrylamide hydrogen bond networkand the chitosan ion crosslinking network. The material has super-compressibility, high tensile strength, high toughness, self-restorability, self-healing property, fatigue resistance and mechanical stability, can maintain good mechanical properties and electrical conductivity in a low-temperature environment, and is expected to be applied to the fields of flexible electronics, wearable electronicequipment, tissue engineering, super capacitors, intelligent robots and the like.

The invention provides a separated solar heat pipe heating/hot water supply device and a method thereof. The separated solar heat pipe heating/hot water supply device comprises an evacuated tube collector, a heat-accumulation water tank and a separated heat pipe, wherein the heat-accumulation water tank is located at a balcony, and a summer water line is formed in the heat-accumulation water tank, and moreover, a water replenishing pipe and a domestic hot water pipe are connected to the bottom of the heat-accumulation water tank; the evaporation section and the condensation section of the separated heat pipe are separated from each other and communicated with each other by use of a steam rising pipe and a liquid falling pipe to form a natural circulation loop; the evaporation section of the separated heat pipe is arranged above the summer water line of the water tank, while the condensation section of the separated heat pipe is embedded in an interior wall for warming. The separated solar heat pipe heating/hot water supply device is provided with the separated heat pipe so that the problem of long-distance unpowered heat transfer can be effectively solved; the separated heat pipe directly serves as a cooling terminal and is efficient in heat transfer capacity; besides, solar energy and building integration is realized.

The invention discloses a novel superthin superconducting-type heat absorbing plate core and a flat-plate solar collector. The flat-plate solar collector is creatively characterized by comprising the heat absorbing plate core based on a corrugated metal thin plate structure, a superconducting mixed heat-transfer working medium, a transparent cover plate, a heat-insulating material layer and a frame. The flat-plate solar collector has the advantages of being compact in structure, high in heat-transfer efficiency, small in pressure loss, light in weight, flexible to mount, high in pressure-bearing capacity, antifreezing, resistant to scaling, corrosion-resistant, long in service life, low in cost and the like, and is quite suitable for being combined with a building. A mixed superconducting heating medium is adopted as a heat-transfer working condition, so that the flat-plate solar collector still can normally run at low temperature, heat utilization efficiency of the flat-plate solar collector is greatly improved, using range of the flat-plate solar collector are greatly expanded, application path of the flat-plate solar collector is widened, and the flat-plate solar collector is widely suitable for solar collection places like civil buildings and industrial workshops.

The invention discloses a fruit/vegetable freezing point composite modifier and a using method of the fruit/vegetable freezing point composite modifier, and provides a fruit/vegetable freezing point composite modifier capable of widening the range of fruit/vegetable ice temperature and a using method of the fruit/vegetable freezing point composite modifier. The fruit/vegetable freezing point composite modifier consists of 3.0-5.5% of calcium chloride solution, 0.5-2.0% of vitamin C solution and 0.3% of delta-glucolactone solution at a volume ratio of 1:1:1. The using method comprises the following steps of: putting the pre-cooled fruit/vegetable and the fruit/vegetable freezing point composite modifier at a weight ratio of 1:(4-6) into a vacuum steeping container for vacuum steeping; and after breaking vacuum, steeping again under normal pressure. The method combines a composite modifier with the vacuum steeping technology, realizes proper balance condition of the matching of the freezing point modifier type, between the modifier concentration and the processing time, between the vacuum degree and the keeping time and the like, can reduce the fruit/vegetable freezing point to 0.5-1.0 DEG C, realizes an obvious control effect on the fruit/vegetable freezing point, and is suitable for the field of fruit/vegetable circulation and storage.

The invention discloses a heat exchanger with a double-shell structure. The heat exchanger with the double-shell structure comprises an outer shell body, an inner shell body and a heat exchange core arranged in the inner shell body, wherein the inner shell body comprises an inner shell with an opening and an inner shell cover plate arranged at an opening end and detachably connected to the inner shell; the outer shell body comprises an outer shell with an opening and an outer shell cover plate arranged at an opening end and detachably connected to the outer shell; the inner shell is sleeved in the outer shell; the inner shell cover plate is sleeved in the outer shell cover plate. That is to say, in the invention, the inner and outer shell bodies can be detached from each other, and the inner and outer shell bodies per se also can be detached, so that the heat exchanger is convenient for cleaning and replacement of a heat exchange core mounted inside the heat exchanger, and avoids damage to the inner and outer shell bodies; meanwhile, a heat insulating material is filled between the inner shell and the outer shell, so that heat-retaining capacity of the heat exchanger per se is enhanced, heat leakage can be prevented, and anti-freezing capability of the heat exchanger is enhanced.

The invention discloses a medium-temperature solar heat collecting tube suitable for industrial application, and belongs to the technical field of solar utilization. The medium-temperature solar heatcollecting tube comprises an outer tube, a central tube positioned in the outer tube, and a heat absorbing plate which is in spiral connection with the central tube, wherein the other side of the heatabsorbing plate is also in spiral connection with a peripheral tube; the central tube communicates with the peripheral tube, i.e., the central tube is connected with the bottom end of the central tube at one end of the peripheral tube; the other end of the peripheral tube is connected with the central tube at the central tube and a metal end cover; and a heat transfer medium is arranged in the central tube and the peripheral tube. The medium-temperature solar heat collecting tube has the advantages of being high in heat-up speed and good in heat transfer performance.

The invention discloses a building cement, which comprises the following substances by mass: 500-600 parts of a cement clinker, 100-300 parts of industrial waste residue, 100-200 parts of pulverized coal ash, 100-150 parts of slag powder, 50-100 parts of river sand, 50-100 parts of fluorine gypsum, 10-20 parts of sodium chloride, 10-20 parts of titanate, 5-10 parts of sodium sulfate, 10-20 parts of alum, and 3-6 parts of sodium nitrite. According to the invention, in a preparation process of the cement, alum and sodium sulfate with antifreezing effect are added into the cement, after further mixing, the product is subjected to bagging, and during use, the cement only needs to be mixed into a concrete raw material. The building cement provided by the invention has strong anti-freezing performance, also is relatively uniform overall, and can reduce the cracking situation.

The invention aims to further improve the dust suppression performance of an anti-freezing dust suppressant, provides a low-freezing-point wetting type dust suppressant and a preparation method thereof, and belongs to the technical field of dust suppressants. The dust suppressant is prepared from the following raw material components in percentage by mass: 0.1 to 2% of sodium lactate, 0.1 to 6% ofpolypropylene glycol, 2 to 10% of glycerol, 0.1 to 5% of an adhesive, 0.2 to 2% of epoxy resin, 0.1 to 1% of a surfactant, 0.1 to 3% of an emulsion and the balance water. The dust suppressant is reasonable in price, convenient to popularize and use, wide in raw material source and easy to implement, and has the characteristics of being non-toxic, tasteless, non-corrosive, easy to spray and the like. The dust suppressant can be used for dust suppression of exposed places such as mine roads, urban roads, municipal construction, coal mine transportation and storage yards.

The invention relates to an anti-congelation technology for ground-targeted exhaust device for automobile, Heat resources is exhausted by the automobile to the ground rather than into the air and the heat resources are utilized to prevent the road from being condensed with ice. After being provided with the ground-targeted exhaust device, the automobile becomes a mobile furnace for roasting pavements and bridge decks. If a highway toll station is equipped with thousands of ground-targeted exhaust devices according to the vehicle flow, the highway toll station can nip in the bud; within a few days before the cold current comes, temporary workers are employed to mount and dismount ground-targeted exhaust devices by utilizing the parking time during which the automobile enters the station to take a card and the payment is executed and the heat discharged into the air by the automobiles passing through the highway is used for roasting the pavements and bridge decks so as to increase the temperature of the road and the bridge for volatilizing water and melting ice and snow, thereby preventing or relieving congelation; the larger the vehicle flow, the better the effect; the energy consumption and pollution are not increased and the efficiency and speed of the vehicle and the traffic safety are not influenced. Providing all automobiles with the ground-targeted exhaust device can enhance the anti-congelation capacity of the main roads.

The invention discloses special anti-freezing powder for a disinfectant. The special anti-freezing powder is prepared by mixing and uniformly stirring anhydrous calcium chloride (CaCl2), anhydrous magnesium chloride (MgCl2), a corrosion and scale inhibitor, a pH buffer agent (Na2B4O710H2O) and an adhesive agent (polystyrene amide). In the prior art, a proper disinfection environment cannot be achieved due to lower temperature of partial regions in winter, the disinfection effect is influenced by the freezing of the disinfectant in the disinfection process, the consumption of the disinfectant is higher, the requirement on the disinfection environment is strict, and a lot of unnecessary economic losses are caused. According to the invention, the product is mainly used in a disinfection process in winter, and has the advantages of high efficiency, low freezing point, easiness in dissolution, low corrosion, low cost and simplicity in operation.