57results about How to "Easy to reflux" patented technology

The mixed aeration type biological treating system features that there are one circular biochemical pond set beside the mixing pond, which has one inside ejector and two overflow grooves in the top including one connected to the mixing pond via an outside circulating pipe; one first stage air floating pond connected to the other overflow groove and to the mixing pond via a sewage reflux pipe; one second stage air floating pond connected to the first stage air floating pond; one blower connected to the circular biochemical pond via ventilating pipeline; and one shallow aeration pipe in the outlet of the ventilating pipeline. The present invention has combined inside-pond circulation and outside-pond circulation, greatly raised impact resistance, and increased chemical-adding coagulating and air floating pond for raised treating capacity.

The invention discloses a method for rapidly determining the content of organic matter in soil. The method comprises steps as follows: 0.05-0.5 g of a soil sample is weighed and added to a digestion tube, 0.1-0.3 g of bismuth nitrate is added, and 10-15 mL of a potassium dichromate-concentrated sulfuric acid solution with the concentration being 0.4 mol / L and 3-5 mL of strong phosphoric acid are added; the digestion tube is placed in a digestion device provided with a graphite heating plate and suitable for simultaneous digestion of large batches of determined samples, accurate heating at 180 DEG C is performed, and organic carbon in the soil is oxidized; residual potassium dichromate in the digestion tube is titrated with a ferrous sulfate standard solution under electromagnetic stirring; then the amount of potassium dichromate consumed by the sample is multiplied by an oxidation correction coefficient, and the content of the organic matter in the soil is calculated. The method has the advantages of being high in accuracy, good in repeatability, simple to operate, low in energy consumption, low in cost, capable of saving time and labor, reliable in determined results and the like.

The invention discloses a device for enhancing the heat dissipation performance of a freezer compressor shell. The device comprises heat pipes and heat dissipation fins; the heat pipes are arranged on the top part and the side surface of the upper shell of a compressor, and are closely connected with the shell; the heat dissipation fins are embedded on the heat pipes, and are uniformly distributed on the top part of the upper shell of the compressor; one side of each heat pipe is semicircular, and the other side is flat, and clings to the upper shell of the compressor; the heat pipes are arch-shaped; the multiple heat pipes are arranged at intervals; the middle part of each heat pipe is arranged on the top end of the upper shell of the compressor, and two ends of each pipe cling to the cylindrical cover-shaped periphery of the upper shell of the compressor from the top end; the distance between every two adjacent fins is 5mm; the lower end of each heat dissipation fin is arc-shaped; the upper end of each heat dissipation fin is linear; the sharp corners of each heat dissipation fin are rounded; and multiple round holes which are regularly arrayed are formed in each heat dissipation fin. According to the device, two phase change heat transfer cycles of each heat pipe share the same condensation end; working mediums at two sides absorb heat from hot ends to be evaporated, and encounter and are mixed in the middle part of each heat pipe, so that strong turbulent convection heat exchange is formed, and the heat dissipation effect is enhanced.

A motor rotor has a magnet (12) made from sintered magnetic powder in which magnetic flux flow is orientated pole-anisotropically. A plurality of the magnets (12) are arranged with alternating polarities on the stator of the frame (11) made from a magnetic body.

Disclosed is an automatic sample digestion and preparation instrument which is composed of an electric heating furnace, reaction tubes, a water bath sleeve, a bracket, an acid mist removal filter screen, a lifting device and a horizontal reciprocating drive mechanism. The bracket, the water bath sleeve and the electric heating furnace are arranged sequentially from top to bottom, the bracket is connected with the lifting device, and tube orifices of the reaction tubes are supported on the bracket; the water bath sleeve sleeves the reaction tubes and is connected with the horizontal reciprocating drive mechanism through a connecting rod; and the tube orifices of the reaction tubes are covered with the acid mist removal filter screen. The electric heating furnace is provided with a furnace cavity for accommodating the reaction tubes. The instrument adopts an open digestion mode, operation steps are safe, energy resources can be saved, acid mist is prevented from escaping to cause pollution to the atmosphere, the sample preparation process is automatically controlled, and the quality of the working environment for experimental technicians is improved.

The invention provides a U-shaped-row-tube type fused salt steam generating device and method. The U-shaped-row-tube type fused salt steam generating device comprises a U-shaped-row-tube heat exchange system, a steam output system and a fused salt input-output system. The steam output system is arranged at the top of the U-shaped-row-tube heat exchange system. The fused salt input-output system is arranged at the bottom of the U-shaped-row-tube heat exchange system. Circulating of high temperature gas and circulating of fused salt can be further controlled through an inlet four-way valve and an outlet three-way valve at the same time. The height of the liquid level and the steam generating speed can be adjusted through a liquid level controller. The parameters of output steam are kept stable through a steam parameter measuring and control device. The U-shaped-row-tube type fused salt steam generating method includes the steps that a system is preheated through the high temperature gas, then fused salt pouring, steam generating and steam outputting are sequentially carried out, and finally fused salt backflow and U-shaped row tube cleaning are carried out. According to the U-shaped-row-tube type fused salt steam generating device and method, the steam yield is large, the parameters are controllable, backflow of the fused salt is easy, blocking is not prone to occurrence, the heat efficiency of the system is high, the structure is simple, the service life is long, and the requirements of the solar high-temperature heat utilization technical field, the solar waste-heat utilization technical field and the nuclear electric power generation technical field can be well met.

The invention relates to a method for manufacturing a TSV seed layer with a fine pitch and a high depth-to-width ratio, belongs to the microelectronic processing technology, and aims to solve the problem that when the bore diameter of a TSV is approximate to or even less than 1 micron, a target material in a PVD process can easily seal an opening of the TSV so that the target material cannot enter the TSV. According to the method, after the PVD is utilized for finishing the deposition of the seed layer, a wafer is placed in a vacuum or low-pressure environment for heating reflux, so that the mobility of a copper seed layer is enhanced; meanwhile, plasma bombard is conducted as a supplement to boost the copper seed layer to flow towards the lower middle portion of the TSV, and the seed layer on the opening of the TSV can be splashed back at the same time to enable the opening of the TSV to be opened. The process of depositing the copper seed layer is continued, and then the reflux process and the plasma treatment process are repeated to improve the continuity of the copper seed layer inside the TSV. Therefore, the proceeding of a follow-up electroplating process is facilitated, and the filling effect of the TSV is guaranteed.

A method for manufacturing a multi-density shoe sole is described, which method incorporates repeated injections of sole material onto a shoe upper (2) mounted on a last (45) and placed in a mould (31).The mould (31) has an injection chamber, moveable side frames (32), a vertically moveable bottom piston (33) and a shoe sole shaping insert (16) which is placed in the mould prior to a first injection and removed from the mould after said first injection and prior to a second injection. The method is characterized in that the entire body of the shoe sole shaping insert (16) is placed inside the injection chamber during the first injection. The shoe sole shaping insert acts as a dummy during the first injection, and leaves after its removal a cavity which in a later injection step is filled with another sole material, either another colour or another density. The invention also concerns an insert used in a mould for injection moulding of shoe soles. The advantage of the invention is more design flexibility as concerns materials and colours of soles.

The invention discloses a vapor chamber with a gradient wick structure and a preparation method of the vapor chamber. The vapor chamber comprises an upper shell plate, a condensation end wick, a support column, an evaporation end wick, a lower shell plate and a liquid injection pipe, wherein the inner surface of the lower shell plate can be a plane or a stepped concave surface, the inner surface of the lower shell plate can be divided into different areas according to the relative positions of the lower shell plate and a heat source contact area, the evaporation end wick is a composite porous medium with different capillary apertures and porosities, and the capillary apertures and the porosities change along with the change of the positions of the different areas. Therefore, a wick structure with gradient characteristics is formed. The effective capillary aperture, porosity and the like of the wick are regulated and controlled, the wick structure with large capillary driving force, high permeability and small flow resistance is prepared, and the vapor chamber prepared on the basis of the wick structure has the advantages of large heat transfer capacity, high heat transfer efficiency, high inverse gravity performance, high reliability and the like; and the heat dissipation requirement of electronic equipment with high heat flux density can be met.

The invention relates to a large-scale transformed low-residue fracturing fluid. The fracturing fluid disclosed by the invention is prepared by mixing the following components in percentage by weight: 0.18-0.50% of thickener, 0.06-0.16% of surface active agent, 0.05-0.1% of emulsion breaker, 0.3-0.9% of clay stabilizer, 0.02-0.18% of fungicide, 0.02-0.09% of defoaming agent, 0.00066-0.09% of gel breaker, 0.0002-0.0009% of gel breaking catalyst, and the balance of water, and according the components, a low-residue fracturing fluid adapted to oil layers at different temperatures can be formed. The low-residue fracturing fluid disclosed by the invention has the advantages of temperature resistance, shearing resistance, good rock stability, low leakoff of the fracturing fluid, and high efficiency of the fracturing fluid, has the characteristics of low residue and strong sand suspending capacity in oil layers and artificial cracks, and capability of achieving an effect of rapid field preparation, and solves the problem of large-scale fracturing transformation on low-permeability difficult-to-recovery reserves.

The invention relates to the technical field of cooking utensils, in particular to a steam valve assembly and an electric cooker having the same. The steam valve assembly includes a valve cover and avalve seat; the valve cover covers the valve seat to define a first cavity; a covering plate is arranged in the first cavity; the covering plate and the valve seat define a second cavity; twice breaking backflow can be performed on steam in the steam valve assembly, steam and rice soup will be prevented from be discharged out of an inner container of the electric cooker, and the spill-proof performance of the steam valve assembly can be improved. Compared with the conventional steam valve assemblies, the steam valve assembly can allow a longer distance and the longer staying time of steam in the steam valve, steam can be broken and flow back easily, the emission of the steam is reduced, and the spill-proof performance of the steam valve assembly is better; and due to the better spill-proofperformance of the steam valve assembly, the inner container of the electric cooker can adapt to stronger firepower, boiling in the electric cooker is more acute, and the cooked rice is good in mouthfeel.

The invention belongs to the technical field of oil exploitation, and particularly relates to an oil leakage collecting device for offshore oil exploitation. According to the problem that seabed oil and sea oil cannot be effectively collected at the same time by an existing oil leakage collecting device, the following scheme is provided, the oil leakage collecting device comprises a supporting plate, a first groove is formed in the outer wall of the middle of the top of the supporting plate, and the inner wall of the first groove is connected with a vertically-arranged connecting pipe througha bearing; and a second groove is formed in the outer wall of the middle of the bottom of the supporting plate, and the inner wall of the second groove is connected with a vertically-arranged second oil guide pipe through a bolt. In the oil leakage collecting device for offshore oil exploitation, through the arrangement of a conic block, when oil is sprayed into a second oil gathering pipe from atable pipe through centrifugal force and extrusion, the conic block can achieve the stop function on the oil, after being attached to the conic block, the oil can flow into an arc guide pipe, then theoil flows into an oil storage box through third oil guide pipes, and recovery to sea oil is achieved.

The invention discloses a novel pyrolysis gasification furnace for organic solid waste. The furnace includes, in order from top to bottom, a furnace top, an upper furnace body, a lower furnace body, amulti-rotating water-cooled grate, and a slag discharge port, wherein the furnace top is provided with a feeding port and an atomizing spray structure; an upper side wall of the upper furnace body isprovided with an explosion-proof door, and the other side is provided with a gas outlet; the gas outlet is communicated with a cyclone separator; purified combustible gas is discharged from a purified gas outlet at the upper end of the cyclone separator; water separated by the cyclone separator is circulated to the atomizing spray structure and sprayed into the gasification furnace; and the sidewall of the lower furnace body is provided with a gas inlet, a multi-point multi-angle gas feeding structure and a gas outlet. The furnace has a simple structure, solves the problem that organic solidwaste gasification processes in the prior art are uneven in gasification, low in gasification efficiency, and high in tar content of combustible gas, and solves the problem that a water washing method which is adopted to remove tar oil at the rear end of a gas flue causes water pollution and waste of energy.

The invention discloses a synchronous carbon and nitrogen removing reactor which is suitable for the treatment of waste water with high ammonia nitrogen and low carbon and nitrogen ratio, in particular for the treatment of kitchen waste water, an anaerobic digestion solution and the like which are similar to the waste water with high ammonia nitrogen and low carbon and nitrogen ratio. The synchronous carbon and nitrogen removing reactor mainly comprises a cylindrical inner cylinder body and a cylindrical outer cylinder body which are coaxial, wherein an aeration device, a jet device, filler, an effluent weir and the like are arranged in the cylinder bodies; biological filter as a carrier is distributed in the inner cylinder; flow-separated ball filler as a carrier is put into the outer cylinder; after the anaerobic digestion solution with the high ammonia nitrogen is treated by the reactor, the removal rate of the ammonia and the nitrogen can reach 75 to 90 percent, and the removal rate of CODCr (Chemical Oxygen Demand) can reach 55 to 65 percent.

The invention discloses an anti-varicose veins compression stocking. The anti-varicose veins compression stocking comprises a stocking body, at least two parallel soft magnetic stripes are arranged onthe outer side of the stocking body, and every two adjacent soft magnetic stripes are mutually attracted. By adopting the structure, when blood flows to the foot from the heart, the blood flows intothe foot so that the stocking body is expanded by a distance, because the attractive force between the magnetic stripes can be sharply reduced after the magnetic stripes are separated by a distance, the overall pressure of the stocking can be reduced, and the blood more easily flows to the foot; while the blood backflows, the stocking is shrunk by a distance, the attractive force between the magnetic stripes can be sharply increased after the magnetic stripes get close by a distance, the overall pressure of the stocking is greatly increased, accordingly, the blood more easily backflows, and itis ensured that that blood flows more smoothly.

The invention relates to a parallel small diameter heat pipe enhanced heat exchange device for recovering medium and low temperature flue gas waste heat, aims to solve the problem of waste of medium and low temperature flue gas waste heat generated in small combustion equipment primarily, recovers the flue gas waste heat by means of parallel small diameter heat pipes to produce hot water or heat other substances, and is suitable for recovering waste heat of small flow flue gas or a discontinuous small flow heat source. The parallel small diameter heat pipe enhanced heat exchange device is primarily characterized in that the parallel small diameter heat pipe enhanced heat exchange device is good in heat transfer property, compact in structure, small in size, easy to process and low in cost,and can achieve self transfer of heat and efficient recovery of waste heat, so that the exhaust gas temperature is reduced greatly and the integral efficiency of the system is improved. The device isquite suitable for heat recovery of small capacity medium and low temperature flue gas waste heat and discontinuous waste heat resources, and a heating container is taken conveniently.

The invention discloses a preparation method of a permanent purple pigment. The preparation method of the permanent purple pigment comprises ball-milling, by weight part, 600 parts of permanent purplecrude products for 20-50 h to obtain pre-milled materials; adding 500-550 parts of n-butyl alcohol and 4000-5000 parts of water into the pre-milled materials, and reflowing the mixture for 3-5 hoursto obtain crystal-transformed pre-milled materials; washing and then evaporation-drying the crystal-transformed pre-milled materials obtain dried crystal-transformed pre-milled materials; adding diluted hydrochloric acid into the dried crystal-transformed pre-milled materials to obtain acidified materials; filtering the acidified materials to obtain an acidified material filter cake; at high speeddispersing the acidified material filter cake into water to obtain a slurry, and secondary-filtering the slurry to obtain a finished product filter cake; drying the finished product filter cake to obtain the permanent purple pigment. By adding the diluted hydrochloric acid into the dried crystal-transformed pre-milled materials to remove impurities produced during ball milling, the preparation method of the permanent purple pigment can reduce the conductivity of the permanent purple pigment, avoid polymerization of the permanent purple pigment and reduce the viscosity of the permanent purplepigment; besides, serving as crystal transformation solvent, the n-butyl alcohol is relatively low in toxicity and easy to recover, thereby being beneficial to cost saving, and meanwhile, through reflowing of n-butyl alcohol aqueous solution, the permanent purple pigment can be high in tinting strength and saturation in an water-based ink system.

The invention discloses a micro-channel vapor chamber with a recess structure. The micro-channel vapor chamber comprises a bottom plate, a capillary core and a cover plate, a concave cavity is formedin the upper surface of the bottom plate, the capillary core is arranged in the concave cavity, a micro-channel structure is machined on the upper surface of the cover plate, concave cavity structuresare arranged on the two sides of the inner surface of the micro-channel structure, the bottom plate and the cover plate form a closed cavity in a welding mode, and the micro-channel vapor chamber with the concave cavity structures is formed through vacuumizing liquid injection. The micro-channel array with the concave cavity structure is adopted to replace a conventional condensation end liquid suction core structure, so that transmission and uniform distribution of a working medium are facilitated, the condensation area of the working medium is increased, a condensation backflow path is shortened, and lower flow resistance and excellent dryout resistance are achieved; and the concave cavity structure can increase the heat transfer area, can generate a jet throttling effect, can disturb steam flow, can inhibit formation of a condensate film, can promote condensation reflux and can increase the anti-dryout limit, so that the heat transfer efficiency is improved.

The invention discloses a water-cooling heat dissipation mechanism for a new energy automobile power battery. The water-cooling heat dissipation mechanism comprises a heat dissipation mechanism body, the power battery and a heat dissipation control module. The inner side of the heat dissipation mechanism body is fixedly connected with a power battery, the bottom of the heat dissipation mechanism body is fixedly connected with a heat dissipation control module, the bottom end of the heat dissipation control module is fixedly connected with a temperature real-time display screen, and the top of the temperature real-time display screen is in lap joint with a temperature control circulating pump; an anti-overflow water injection opening is connected to one side of the interior of the heat dissipation control module in an embedded mode, the anti-overflow water injection opening well embodies the anti-seepage performance of the mechanism, a water-cooling one-way valve can well prevent the backflow phenomenon, and the heat power generation mechanism well embodies the functional diversity of the mechanism. The temperature control alarm mechanism plays a role in reminding workers to control the temperature, the water bath circulation heat dissipation mechanism well achieves the effects of circulation refrigeration and efficient heat dissipation and cooling, and the power battery heat dissipation device is suitable for being used in the technical field of power battery heat dissipation and has wide development prospects in the future.

The invention relates to the technical field of sterilization cabinets and discloses a sterilization cabinet which comprises a cabinet body, a water tank and a bracket; the cabinet body is fixedly arranged at the upper end of the bracket; the water tank is fixedly arranged at the middle part of the bracket; the cabinet body is internally provided with multiple transversely arranged rectangular frames; supporting net frames are fixedly connected to the intetriors of the rectangular frames respectively; multiple groups of guide rails are fixedly connected to the left inner side wall and the right inner side wall of each cabinet body respectively; the multiple rectangular frames are connected with the cabinet body in a sliding manner through the multiple groups of guide rails respectively; the left side and the right side of the cabinet body are provided with multiple limiting mechanisms, corresponding to the guide rails, respectively and are connected with the multiple rectangular framesthrough the limiting mechanisms respectively; a water pump is fixedly arranged in the water tank; and a water outlet pipe is fixedly connected to the output end of the water pump. For the sterilization cabinet, an appliance can be sterilized and disinfected by high-temperature and high-pressure steam, and reflux condensation can be performed on the sterilized and disinfected steam, so that steamwater can be repeatedly used, and water source conservation and cleaning of the supporting net frames and filtering nets in the cabinet body are facilitated.

The invention relates to the field of heat energy technical equipment, in particular to an underground heat storage tank which comprises a tank top cover (1), a tank wall (2) and a tank bottom (3). The underground heat storage tank is characterized in that a molten salt pump hole (4), a molten salt inlet (5), a molten salt stirrer hole (6), an electric heater hole (7), a level gauge (8), a thermometer (9), a maintenance manhole (10) and an insulating layer A (11) are arranged on the tank top cover (1); an electric heating layer (12) and a temperature sensor (13) are arranged on the inner side of the tank wall (2); and an insulating layer B (14) is arranged at the outer part of the tank wall (2). According to the underground heat storage tank provided by the invention, a heat storage device is prevented from losing overmuch heat energy by being arranged in the atmosphere environment, a tank body can be prevented from being eroded by natural disasters including blown sand, the service life of the heat storage tank is prolonged and the changing cost and expense are lowered.

The invention relates to a large-scale transformed low-residue fracturing fluid. The fracturing fluid disclosed by the invention is prepared by mixing the following components in percentage by weight: 0.18-0.50% of thickener, 0.06-0.16% of surface active agent, 0.05-0.1% of emulsion breaker, 0.3-0.9% of clay stabilizer, 0.02-0.18% of fungicide, 0.02-0.09% of defoaming agent, 0.00066-0.09% of gel breaker, 0.0002-0.0009% of gel breaking catalyst, and the balance of water, and according the components, a low-residue fracturing fluid adapted to oil layers at different temperatures can be formed. The low-residue fracturing fluid disclosed by the invention has the advantages of temperature resistance, shearing resistance, good rock stability, low leakoff of the fracturing fluid, and high efficiency of the fracturing fluid, has the characteristics of low residue and strong sand suspending capacity in oil layers and artificial cracks, and capability of achieving an effect of rapid field preparation, and solves the problem of large-scale fracturing transformation on low-permeability difficult-to-recovery reserves.

The invention discloses a multi-block polyether type macromolecular surfactant as well as a preparation method and application thereof. The macromolecular surfactant is obtained by carrying out alkoxylation reaction and ring-opening polymerization reaction on a monofunctional raw material and a bifunctional raw material, and can be used as an anti-staining agent for denim fabrics. According to the invention, monofunctional polyether is used as an end-capping reagent, a completely-terminated alcohol ether inert solvent I and a Lewis acid catalyst are used to form a complex, and the alcohol ether inert solvent I is added, so that the molecular weight is regulated and controlled in the synthesis process, the temperature of the whole reaction system is effectively controlled, and reaction implosion is prevented; the molecular structure of the prepared macromolecular surfactant is rich in aromatic ring structures, so that the macromolecular surfactant is easier to generate intermolecular acting force with aromatic groups of organic dyes or pigments and is easier to adsorb on the surfaces of the organic dyes or the pigments, and therefore, the macromolecular surfactant has a better dispersion effect on the organic dyes or the pigments.

The invention relates to an immobilized type ionic liquid catalytic reaction rectification device. The immobilized type ionic liquid catalytic reaction rectification device comprises a rectification tower and a raw material storage groove connected with the rectification tower, wherein fillers and a catalyst fixed layer are arranged in the rectification tower; the rectification tower is provided with a tower top reflowing device and a tower kettle storage groove. The immobilized type ionic liquid catalytic reaction rectification device is characterized in that the rectification tower is connected with the tower top reflowing device and a liquid separation rectification head through an electromagnetic reflux ratio controller; the tower top reflowing device comprises an outer reflowing rectification head and a tower top condenser; the liquid separation rectification head is formed by connecting three pipes which are arrayed in parallel and exist independently, and is controlled through the electromagnetic reflux ratio controller. With the adoption of the device, an esterification and product separation process can be effectively shortened, the production efficiency of an esterified product is improved, a traditional process can be replaced and environment-friendly and efficient reaction rectification is realized.

The invention discloses a production method of gamma-chloropropyl trichlorosilane, belonging to the technical field of silicon chemical industry. The production method is characterized by comprising the following preparation steps: proportioning trichlorosilane and chloropropene, and then injecting into a measuring tank for standby application; adding a chloroplatinic acid catalyst, a side reaction inhibitor and silicon tetrachloride into a reaction still; adding the whole chloropropene into the reaction still, and then starting to dropwise add the trichlorosilane, wherein when the temperature of the reaction still is gradually increased to 57 DEG C along with the process of a reaction, silicon tetrachloride starts to get condensate and flows back, and the whole trichlorosilane is dropwise added within 4h-9h; after the whole trichlorosilane is dropwise added, increasing the temperature to 80-90 DEG C, keeping the temperature for 1-2.5h, and separating a product to obtain the gamma-chloropropyl trichlorosilane. According to the production method, the reaction can be performed at a low temperature or normal temperature, an induction period is not needed, the reaction time is short, and the catalyst is not easy to inactivate and is small in use amount.

The invention relates to the field of household appliances and discloses a steam valve and an electric cooker. The steam valve comprises a foam breaking structure, the foam breaking structure comprises a foam breaking chamber (12) and a foam breaking member (13), the foam breaking chamber (12) has a steam inlet (120) and a steam outlet (121), and the foam breaking member is arranged in the foam breaking chamber and can reciprocate between the steam inlet and the steam outlet, so that the foam breaking chamber is in an expanding shape from the steam inlet to the steam outlet. The expanding foambreaking chamber enlarges the steam discharge area, so that liquid such as rice soup can flow back easily. By applying the steam valve to the electric cooker, the cleanness and the safety performanceof the electric cooker are improved.

The invention relates to a novel magnesium alloy casting pipette and a pipetting method thereof, and belongs to the technical field of magnesium alloy forming and pouring. The novel magnesium alloy casting pipette can effectively prevent magnesium alloy liquid from blocking a pipeline due to temperature reduction, save electric energy and reduce temperature fluctuation of the magnesium alloy liquid so as to guarantee the product quality. The novel magnesium alloy casting pipette comprises an inner-layer flow guide pipe, an outer-layer flow guide pipe, a sleeve arranged on the outer side of theinner-layer flow guide pipe in a sleeving manner, electric heating wires wound on the outer wall of the inner-layer flow guide pipe in a segmented manner, a thermocouple used for detecting the temperature of each electric heating wire and a heat preservation belt arranged between the sleeve and the electric heating wires, wherein a connecting flange is fixedly arranged on the sleeve, and one endof the sleeve is hinged to a liquid baffle plate covering the end of the inner-layer flow guide pipe. The pipetting method comprises the following steps of S1, segmented preheating; S2, pipette fixing; S3, pipette heating; and S4, material discharging.

The invention relates to the technical field of kitchen cookers, in particular to a steam valve assembly and a rice cooker provided with the same. The steam valve assembly comprises a valve cover and a valve seat; the valve cover covers the valve seat to define a first cavity; and meanwhile at least one second cavity is further formed in the first cavity. The multiple cavities are formed in the steam valve assembly, thus multiple times of bubble breaking and backflow can be conducted, and the overflow prevention performance is better; the multiple cavities are formed in the steam valve assembly, thus steam is longer in passing distance and longer in staying time in a steam valve, the steam is more easily subjected to bubble breaking and backflow, the discharging quantity of the steam is reduced, and the overflow prevention performance of the steam valve assembly is better; and the overflow prevention performance of the steam valve is better, and thus an inner pot of the rice cooker can adapt to larger firepower, so that boiling in the rice cooker is more intense, the taste of rice is better, and the performance of the rice is improved.

The invention discloses a speed-up vacuum upper-suction casting mould. The speed-up vacuum upper-suction casting mould comprises a mould tree, transition slots and a sealing shell, wherein the mould tree comprises a vertical through tube, the vertical tube is connected with a plurality of mould cavities in an inclined mode, the mould cavities communicate with the vertical tube through liquid flowing paths, and height of the liquid flowing paths is gradually increased in a radical outward direction of the vertical tube; the transition slots are formed in the inner wall of the vertical tube in asinking mode, one transition slot is crossed above each liquid flowing path, the sinking depth of each transition slot is gradually increased from top to bottom, and a plane on which boundaries of the transition slots and the liquid flowing paths are located is perpendicular to axes of the liquid flowing paths; and the sealing shell covers the mould tree, the mould tree is provided with an insertion tube which is assembled with the sealing shell and communicates with the outside, and the sealing shell is connected with a vacuum generator. The transition slots with the special designs can be adopted to take away metal liquid locally left on the liquid flowing paths, and meet dimension requirements are being solidified, so that follow-up trimming amount is reduced, and speed-up processing effect is achieved.