50results about How to "Prevent low temperature" patented technology

The invention is directed to a fuel composition for diesel engines. The fuel composition comprises 0.1-99% by weight of a component or a mixture of components produced from biological raw material originating from plants and / or animals and / or fish. The fuel composition comprises 0-20% of components containing oxygen. Both components are mixed with diesel components based on crude oil and / or fractions from Fischer-Tropsch process.

A device that warms a surface of a living body required to be warmed at an appropriate timing at any place indoors and outdoors or the sea without causing low temperature burns. A sheet having a heat generating function including a circuit capable of receiving electric power without contact over a sheet containing plastic or a fibrous body, a heat generating circuit, and a circuit that controls the temperature of the heat generating circuit is manufactured. The user with the sheet transmits the radio signal from the transmission device outdoors or indoors to heat the heat generating circuit on the sheet and the heat can be conducted to the skin of the user. Temperature can be automatically adjusted by the circuit for controlling the temperature of the heat generating circuit.

An improved process for the preparation of pyrimidine derivatives is provided comprising reacting a Wittig reagent of the general formula wherein R is an alkyl of from 1 to 10 carbon atoms, aryl or arylalkyl, R1 is a substituted or unsubstituted hydrocarbon group, R2 and R3 are the same or different and are hydrogen or a substituted or unsubstituted hydrocarbon group; Z is sulfur, oxygen, sulfonyl, or imino which may be substituted by formyl, acetyl, propionyl, butyryl, isobutyryl, valeryl, isovaleryl, amino substituted by sulfonyl or alkylsulfonyl, and sulfonyl substituted by alkyl, amino or alkylamino and X is a halogen; with an aldehyde of the general formula wherein R4 is hydrogen, a lower alkyl or a cation capable of forming a non-toxic pharmaceutically acceptable salt and each R5 are the same or different and are hydrogen or a hydrolyzable protecting group, or each R5, together with the oxygen atom to which each is bonded, form a hydrolyzable cyclic protecting group, or each R5 is bonded to the same substituent which is bonded to each oxygen atom to form a hydrolyzable protecting group; in the presence of a base.

Gold nanoparticles conjugated to polyethylene glycol and active binding molecules such as antibodies, proteins, lectins and DNA are suspended in a water vehicle at concentration from 107 to 1015 and then placed in a sealed container such as a centrifuge tube, and then the centrifuge tube is sealed in a film package that is non-air permeable.

The invention discloses an electrochemical polishing electrolyte and polishing method for titanium and a titanium alloy. The electrolyte comprises, by mass percentage, 10%-90% of corrodent, 1%-5% of an additive, 1%-5% of a polynitrogen compound and the balance water. The electrochemical polishing method comprises the following steps of pretreatment, surface oil removal and acid pickling treatment, electrolyte compounding, electrochemical polishing treatment and aftertreatment. The electrochemical polishing electrolyte is simple in formula, stable in performance, long in service life, low in price and capable of being used cyclically for multiple times; reaction conditions such as the low temperature or the relatively high voltage or the large current are not needed; and the electrochemical polishing electrolyte is more suitable for large-scale industrialized production. The surface reflectivity of a finished workpiece obtained through the electrochemical polishing method ranges from 70% to 95%, and surface roughness Ra is smaller than 0.05 micron.

An object of the present invention is to provide a heat generating body giving no uncomfortable feeling when in use and causing no direct close contact between a heat generating member and the skin by an adhesive to relieve the burden of the skin while eliminating a low temperature burn even for a person with a delicate skin and in the case of continuous use. The heat generating body of the present invention is characterized in that the heat generating member having a wide surface is provided on a mesh-like sheet larger in outer shape than the one-side wide surface of the heat generating member and that an adhesive layer is provided on the mesh-like sheet located at the outer peripheral part of the heat generating member.

The invention provides an instant electric water heater, which comprises a heater (1), a cool water inlet (2) and a hot water outlet (3) connected to both ends of the heater (1). A branch (4) connected in parallel with the heater (1) is arranged between the cool water inlet (2) and the hot water outlet (3). A solenoid valve (5) is arranged in the parallel branch (4). A signal input end of the solenoid valve (5) for controlling a drive circuit is connected with a temperature sensor (6) for measuring the water temperature in the heater (1). The on / off of the solenoid valve (5) in the parallel branch (4) is controlled through the temperature sensor (6), so that high-temperature water which is heated for a short time in the heater is mixed with cold water in the parallel branch and then the mixed water is discharged when hot water is used again so as to ensure that instant high temperature of outlet water cannot occur.

Disclosed herein is a liquid crystal display device, including: a first substrate; a second substrate; a plurality of spacers disposed between the first substrate and the second substrate; and a liquid crystal layer filled between the first substrate and the second substrate supported by the plurality of spacers; wherein each of the plurality of spacers has a multiple step structure having one or more steps.

The invention discloses a pipeline pressure-stabilizing system and method used after a liquefied petroleum gas out-conveying pipeline stops conveying. The pipeline pressure-stabilizing system comprises a temperature sensor, a pressure sensor, a first-stage pressure-stabilizing device and a second-stage pressure-stabilizing device. The temperature sensor and the pressure sensor are arranged on a main pipeline short section, and the first-stage pressure-stabilizing device and the second-stage pressure-stabilizing device are connected with the main pipeline short section. The first-stage pressure-stabilizing device comprises a first block valve, a stop valve and a pressure buffering tank which are sequentially connected with the main pipeline short section. A second block valve is arranged between the first-stage pressure-stabilizing device and the second-stage pressure-stabilizing device. The second-stage pressure-stabilizing device comprises a third block valve, a pressure buffer, a pressure regulating device and a liquefied petroleum gas storage tank which are sequentially connected with the main pipeline short section. The temperature detection result obtained when conveying is stopped is compared with the ground temperature, the pressure change in the pipeline after a certain period is calculated, and the first-stage pressure-stabilizing device is used for carrying out pressure supplementation on the pipeline according to the analysis result, or the first-stage pressure-stabilizing device and the second-stage pressure-stabilizing device are used for releasing the pressure of the pipeline to achieve pressure stabilization of the pipeline after conveying is stopped, the system safety is guaranteed, and pigging and emptying of the whole line are avoided.

In the present invention, an iron based alloy which contains by mass %: 0.20% or less of C; 6.0 to 16.0% of Cr; 6.0 to 16.0% of Ni and whose martensitic transformation starting temperature (Ms point temperature) is in the range of 0-170° C., inclusive of 0° C. and exclusive of 170° C., is used as a welding material. With respect to a weld metal, the weld metal has a iron alloy composition which contains by mass %: 0.20% or less of C; 3.0 to 13.0% of Cr; 3.0 to 13.0% of Ni and whose martensitic transformation starting temperature (Ms point temperature) is in the range of 50-360° C., inclusive of both 50° C. and 360° C.

The invention discloses a liquid ethane conveying pipeline pressure protection system and method. The system comprises forward pressure relief systems and reverse pressure relief systems which are arranged in parallel on trunk line pumps or valve bypasses. According to the system and the method, the pump or valve front pressure increment caused by action of the pumps or trunk line valves in a liquid ethane pipeline or the isolation section pressure increment caused by temperature rise is automatically released into adjacent upstream and downstream trunk lines by stimulating relief devices arranged on the pumps of the valve bypassed so as to prevent overpressure mediums from entering the atmosphere and limit the highest operating pressure of each pipe section. The system and the method havethe advantages that the water hammer overpressure problem under transient operation of a pipeline can be solved, the influence on the strength of the pipeline due to the volume change caused by influence of the temperature of the mediums after shutdown of the pipeline can be avoided, the overpressure mediums are not discharged from the system after being released, and therefore the investment ofaccessory facilities are reduced, and the safety, environmental protection and energy conservation effects can be achieved.

The invention provides an intelligent thermal-preservation and anti-freezing method for a heat exchanger, which comprises the following procedures: a heat-trace belt in a length got by calculation and experiment(s) is wound on the surface of the heat exchanger in calculated interval, and is adhered on the surface of the heat exchanger by an adhesive tape; a temperature probe is fixed at the middle lower part of the surface of the heat exchanger; 40mm-thick polyurethane is formed on the surface of the heat exchanger, the heat-trace belt and the temperature probe are foamed integrally with the heat exchanger so that they are heat preserved and heat isolated from outside, and the external joints of the heat-trace belt and the temperature probe are reserved; when the temperature probe for the surface of the heat exchanger detects that the temperature is lower than the specified temperature, the temperature control will start the heat trace to carry out temperature compensation; when the probe detects that the temperature is higher than another specified temperature, the temperature control will stop the heat trace. The invention has the advantages of the small footprint, the capability for preventing low environmental temperature, the capability for preventing damage due to freezing caused by temperature drop in the pipeline or joints of the heat exchanger, and the energy saving, etc.

Object: To provide a chocolate or chocolate-like food capable of inhibiting occurrence of low-temperature bloom.Means for solving problem: A chocolate or chocolate-like food of the present invention comprises an oil and fat, wherein the oil and fat comprises 50 to 85% by weight of triglyceride having an oleic acid at position 2 and saturated fatty acids having 16 or more carbon atoms at positions 1 and 3 (XOX type triglyceride); and 5 to 18% by weight of triglyceride in which two oleic acids are bound and one saturated fatty acid having 16 or more carbon atoms is bound (X02 type triglyceride). According to such a chocolate or chocolate-like food, the low temperature bloom can be inhibited.

The invention discloses a heat dissipation system and a method for a fan engine room, and belongs to the technical field of wind power operation and maintenance. The air entering through an air inlethole spirally accelerates and lifts the inside of the engine room and then is discharged through an air outlet, and the heat is brought out when flowing through the engine room; this method can reducethe temperature in the engine room quickly and effectively with a low cost by increasing the air circulation inside and outside the engine room and increasing the air circulation speed, and the oil smoke in the engine room can be prevented from polluting a fin channel of a cooler. The system is safe and reliable, with high degree of automation, the labor cost and the operating cost are reduced, and the heat dissipation capacity of the existing fan is improved. The structure design is reasonable, the heat dissipation capacity of the existing fan can be improved effectively, and the operation safety and stability of the fan are improved.

The invention provides a preparation method of salbutamol sulfate, and relates to the technical field of chemical synthesis. The preparation method of salbutamol sulfate comprises the following steps: (a) carrying out reaction on salicylic acid and a tert-butyl amino acetyl halogenating reagent under the action of a chlorinating agent to generate an intermediate 1; (b) reacting the intermediate 1 under the action of Lewis acid to generate an intermediate 2; (c) reacting the intermediate 2 under the action of an acid reagent to generate an intermediate 3; (d) reacting the intermediate 3 with a reducing agent under the action of a catalyst to generate salbutamol; and (e) reacting salbutamol with sulfuric acid to generate salbutamol sulfate. The raw materials are simple and easy to obtain, the reaction condition is mild, the reaction operation is simple, the reaction process is easier to control, and the safety coefficient is high; used raw materials, solvents and the like are environment-friendly; and the yield and purity of salbutamol sulfate are high, and a process route capable of industrially producing a product with higher quality is provided.

The invention relates to the technical field of analysis of bee fertility, in particular to a bee fertility analyzer and an application method of the bee fertility analyzer. The bee fertility analyzerincludes a box main body, a honeycomb scrap cleaning drawer, a high-definition auto-focusing camera, a USB interface, a network cable interface, a power interface, a box bottom cover, an LED light source array, a PCB integrated control panel, a constant temperature heating board, a fan and a temperature sensor, wherein an image sensing layer, an image analyzing layer and an internal environment control layer are arranged in the box main body, a liquid crystal touch panel, a honeycomb placement clamping slot overturning cover and a device power main switch are arranged on the top of the box main body, and concave handles are arranged on two side surface of the box main body; and honeycomb placement clamping slots are formed in the inner walls of the left side and right side of the box mainbody, the honeycomb scrap cleaning drawer is arranged on the right side wall of the box main body, and the high-definition auto-focusing camera is arranged in the front of the box main body. Throughthe bee fertility analyzer, the fertility of bee swarms can be measured in a bee farm in a short time, and the bee fertility analyzer is simple, efficient, fast, convenient, standard and accurate.

The invention discloses a cash drawing box based on burning fuming technology, belonging to the technical field of financial safety. The cash drawing box comprises a box body, a burning fuming device,a triggering device and a lockset device, wherein an isolating plate structure is arranged in the box body; the burning fuming device is arranged in the isolating plate structure and is composed of agroove structure, a hole structure, kindling, oxidizer and a control circuit; the triggering device is used for triggering the burning fuming device to work, obtaining a box opening signal or a box closing signal and sending the signal to the lockset device; and the lockset device is used for locking a box cover or releasing the box cover. Through the technical scheme in the invention, the cash safety during the process of circulation can be enhanced, the cash becomes invalid under the condition that the cash drawing box is damaged, and therefore, the cash circulation order is maintained.

In the present invention, an iron based alloy which contains by mass %: 0.20% or less of C; 6.0 to 16.0% of Cr; 6.0 to 16.0% of Ni and whose martensitic transformation starting temperature (Ms point temperature) is in the range of 0-170° C., inclusive of 0°C and exclusive of 170° C., is used as a welding material. With respect to a weld metal, the weld metal has a iron alloy composition which contains by mass %: 0.20% or less of C; 3.0 to 13.0% of Cr; 3.0 to 13.0% of Ni and whose martensitic transformation starting temperature (Ms point temperature) is in the range of 50-360° C., inclusive of both 50° C. and 360° C.

The invention discloses a system and method for safe filling after liquid ethane pipeline overhauling. The system comprises a trunk system, a trunk valve chamber system, an ethane filling system and apipeline temperature and pressure detection system, the trunk valve chamber system is responsible for emptying and reopening of upstream and downstream pipelines of a valve chamber and also providesa channel for replacing of a trunk pipeline, and the ethane filling system is used for introducing ethane from an upstream trunk line, heating the ethane for temperature adjustment and then feeding the ethane into a to-be-opened downstream trunk line before the downstream trunk line is reopened. According to the functional demand of reopening of a liquid ethane pipeline after overhauling and releasing, on the basis of the characteristic that the liquid ethane is vaporized under the low pressure to cause the low temperature, by adopting the measures that an upstream pipe section provides a medium filling channel through a valve chamber bypass, an initial-stage filled medium is externally connected with equipment for vaporization heating, and middle-and-later-stage filling, boosting and liquidation are conducted, the problem of low temperature of the medium in the filling process of an isolated and overhauled section of the liquid ethane pipeline is effectively controlled, safe operationof the liquid ethane pipeline is guaranteed, and the effective guarantee is provided for safe operation of the liquid ethane pipeline.

Provided is a liquid crystal display panel in which both the prevention of low-temperature bubble defects and the prevention of unevenness in brightness by pressure can be achieved without the need of forming multiple types of spacers differing in the height. In a liquid crystal display panel comprising a plurality of spacers 14 arranged between a pair of transparent substrates 11 and 12 and a liquid crystal 13 encapsulated between the transparent substrates, the spacers 14 are of a uniform height and each spacer 14 is substantially in a trapezoidal shape in which the ratio between the top area and the bottom area is 0.3 or less. The spacers 14 are formed on one of the transparent substrates 11 and 12. The spacers 14 are arranged at appropriate density so that the contact area ratio of the spacers' top surfaces in contact with the opposing substrate per unit area is within a range of 0.8%-1.0%.

The invention relates to a synthetic method of (S)-1,2,3,4-tetrahydroisoquinoline tert-butyrylamide with high optical purity, comprising the following steps: 1. allowing a quinoline carboxylic acid compound (2) to react with dimethyl carbonate at the temperature of 0-95 DEG C to prepare a N-methyl formate compound (3), wherein, halogeno salt is taken as a catalyst and dimethyl carbonate is taken as solvent; 2. performing aminolysis to the compound (3) by tert-butylamine at the temperature of 20-160 DEG C to prepare a compound (4), wherein, arene or halogenated hydrocarbon inert solvent is adopted; 3. carrying out decarboxylation reaction to the compound (4) by halogenated acid at the temperature of -50-80 DEG C to prepare an amide compound (5), wherein, the mixed solvent of arene or halogenated hydrocarbon and water is adopted; and 4. mixing alkali with sodium hydroxide, extracting, concentrating and crystallizing to obtain a target product. An environmental-friendly and clean raw material of dimethyl carbonate is adopted, highly toxic raw materials such as phosgene and the like are not used so as to avoid reaction with certain danger in case of low temperature, ultralow temperature, hydrogenation and the like. The synthetic method has low raw material cost and is suitable for industrial production.

A process for producing synthesis gas, the process including the steps of: a) in a reforming reactor, reacting a hydrocarbon feed stream together with an oxidant gas stream, thereby producing a first synthesis gas stream; b) providing a heated CO2 rich gas stream to an adiabatic post converter including a second catalyst active for catalyzing steam methane reforming, methanation and reverse water gas shift reactions; and c) in the adiabatic reforming post converter, letting at least a part of the first synthesis gas stream and the heated CO2 rich gas stream undergo steam methane reforming, methanation and reverse water gas shift reactions to thereby provide a product gas stream, the product gas stream being a synthesis gas stream. Also, a system for producing synthesis gas.

The invention relates to a marine casualty rescue capsule which is in the shape of a circular flat ball made of steel plates and can be used by multiple persons, wherein the transverse diameter phi of the circular flat ball is 2,200mm and the vertical center height of the circular flat ball is 1,800mm. A balance column with the diameter phi of 320mm and the length of 1,700mm is arranged in a structural column at the center of the inner side of the rescue capsule and can pneumatically move and extend out of the rescue capsule downward to be used for preventing the rescue capsule from swaying and overturning. A seal capsule door is arranged on one side of the upper end of the rescue capsule in the transverse diameter, three chord windows and the capsule door are distributed uniformly in 90 degrees and are of the same height, two air path waterproof devices consisting of U-shaped bends are symmetrically arranged at the top end of the outer side of the rescue capsule and have the diameter phi of 100mm, one end of each air path waterproof device is connected with the interior of the rescue capsule, a part at 10mm of the lower end of the downward bent pipe opening of the other end of each air path waterproof device is provided with a floating ball bowl, a water outlet is arranged at the bottom of the floating ball bowl, and a vacuum-like floating ball is arranged in the floating ball bowl.

The Accelerated Slow Roasting Apparatus is a device for slow-and-low cooking a whole previously butterflied-prepared animal carcass comprising a closed cooking chamber with a plurality of adjustable air vents arranged on the bottom edge of said cooking chamber and a plurality of adjustable opening vents on a vertical side of the lid of said cooking chamber, and a slide out cooking grate with adjustable rails to support the grate while out of the cooking apparatus, a plurality of removable cooking fuel trays, wherein said cooking grate is positioned between twenty-five and forty centimeters above said cooking fuel trays to enable a flame-flare-up free, time-accelerated, slow-and-low cooking of said animal carcass in half, or less than half, of the traditional sixteen to twenty-two hours cooking time.

The invention provides a start-stop AGM battery air tightness detection structure and detection method, and belongs to the technical field of lead-acid storage batteries, the start-stop AGM battery air tightness detection structure comprises a first detection channel and a second detection channel which are arranged in parallel, and the first detection channel is sequentially provided with a first valve, a first air chamber and a second valve; and a third valve, a second air chamber and a fourth valve are sequentially arranged on the second detection channel. According to the start-stop AGM battery air tightness detection structure, the first detection channel and the second detection channel can be independently opened by opening and closing the first valve, the second valve, the third valve and the fourth valve. When the first detection channel is opened, the airtightness of a sealing plug can be detected, including the airtightness of the sealing plug and the airtightness of an upper seal and a lower seal of the sealing plug and the shell. And when the second detection channel is opened, the air tightness of a battery shell and a battery cover can be detected. And the phenomena of performance reduction of battery capacity, low temperature, service life and the like caused by poor sealing of the areas are avoided.

The invention relates to a connection compensation device for preventing local low temperature of a high-temperature furnace chamber prepared from a single crystal material, and belongs to the technical field of crystal material preparation. In the present invention, a conductive heat-insulating bridge is used to connect with a conductor, due to that the wall thickness of the conductive heat-insulating bridge is greatly reduced and the contact surface area is greatly increased, and the wall surface is directly buried in the furnace chamber heat preservation and insulation layer, and based on a heat transfer principle, three temperature areas with gradually reduced temperature are respectively formed in areas near the conductive heat-insulating bridge I, the conductive heat-insulating bridge II and the conductive heat-insulating bridge III from the inner cavity of the furnace chamber heat preservation and insulation layer at high temperature to a connecting conductive sheet at room temperature; the temperature area of the conductive heat-insulating bridge I is subjected to heating compensation through a temperature heating compensator, so that the problem that low temperature is formed in a local area close to the high-temperature furnace chamber due to too fast heat conduction of a connecting conductive sheet is prevented, and the uniformity of radial temperature and axial temperature gradient in the furnace chamber is effectively improved; and the high-temperature furnace for preparing the single-crystal material can be used for preparing the high-quality single-crystal material.