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introduction： Cryogenic equipment for the storage and transportation of liquefied natural gas﹑Liquid oxygen﹑Liquid nitrogen﹑Containers for liquid hydrogen and liquid helium, etc。For long-term storage of liquefied gas﹐Effective insulation must be used。The storage tank is usually of double construction。Inner cylinder(Also known as the inner bladder)Storage of liquefied gas﹐Inner tube and outer tube(Outer gallbladder)An insulating layer is formed between them﹐To reduce by conduction﹑convection﹑Heat radiated into the inner cylinder。 The main performance indicator of deep cryogenic liquefied gas storage tank is evaporation rate。The evaporation rate is the volume of liquefied gas and the rated capacity of cryogenic liquid stored and transported in the storage tank due to the introduction of external heat in the unit time
2015-02-23 Reading quantity 2873
introduction：Abstract：In order to improve the surface treatment quality of large volume integrated capacitor housing，Reduce labor intensity，Improve the working environment，Where space is limited，The relevant experiments of environmental protection brush coating phosphating powder were carried out，The film layer with ideal effect of removing oil and rust was obtained，The film has good compatibility with insulating oil，Good corrosion resistance under natural ventilation，The adhesion with the paint film reaches one level。 keyword：Environmentally friendly brush coated phosphating capacitor housing applications1introduction The housing of the integrated capacitor is large，Due to the limited working space，The existing phosphating production line can not meet its phosphating needs，Square sanded with hand sandpaper
2015-02-23 Reading quantity 2782
introduction： Abstract：The principle of rapid prototyping technology and several typical forming methods are introduced。meanwhile，The application of rapid die technology based on rapid forming technology in die manufacturing industry is also introduced，And the status quo and development trend of rapid prototyping technology。 keyword：Rapid prototyping；Rapid die；Direct and rapid molding；Indirect rapid molding。 introduction Rapid prototyping（Rapid Prototyping , RP.）technology，Also known as rapid prototyping，20century80It originated in the United States in the late 1990s。The technique is a set of computer aided design、machine、Numerical control、check
2015-02-23 Reading quantity 2886
introduction：mohe running-in running-in After the machine is assembled and before use，A measure for the normal and stable operation of mating parts，Also known as running。Running-in is a deliberate wear and tear process。The wear process of mechanical parts generally includes the running-in stage、Steady wear stage and severe wear stage(See picture[The wear process of mechanical parts])。OAIt is the run-in stage。After the machine starts，Attrition rate(namelyOASlope of curve)From big to small。This is due to the micro-uneven surface of the friction pair，The actual contact area is small at first,High contact stress。In the running-in process,Softer parts
2015-02-23 Reading quantity 2794
introduction： Types of water supply equipment It is divided into three categories according to the principle and composition of water supply equipment： Air replenishment type water supply equipment、Sac water supply equipment、Variable frequency water supply equipment。 1、Air replenishment type water supply equipment：Take advantage of the compressibility of the air in the sealed tank，Water supply device for regulating water delivery，Its function is equivalent to a high water tank or water tower，The work of the pump is automatically controlled by the change of pressure in the air tank，When there is insufficient air pressure in the tank，It can automatically replenish air and pressurize。 2、Sac water supply equipment：The capsule contains a water chamber，Between the canister and capsule is the air chamber，Primary inflation routine
2015-02-22 Reading quantity 2886
introduction： Apply： Applied to juice，Aseptic packaging of liquid foods such as fruit purees and jams，Room temperature，The product can be stored for more than one year，It can save the cost and risk of low-temperature refrigerated transportation。 Working principle： The aseptic filling machine is directly connected to the aseptic processing line，The product can be filled in sterile bags，Aseptic bag is aluminum-plastic composite multi-layer bag，It can effectively isolate sunlight and oxygen，The sterile bag should be placed in a protective box or a large bucket，Can be transported long distances。 The filling chamber of the aseptic filling machine is sterile，Aseptic bag
2015-02-22 Reading quantity 2796
introduction： Product modeling design must have insight into the development trend of science and technology，Pay close attention to new theories、New technology、New technology、The emergence of new materials，It should be used as much as possible，It can fully transform the advanced scientific and technological research results into commodities with practical functions，Design products that conform to the aesthetic characteristics and cultural tendencies of The Times。It is inevitable that the designed products will change accordingly with the conditions of The Times, social environment and social psychological reflection，Study and predict this changing trend，It is very important for designers to grasp the design tendency and characteristics。 Due to the countries of the world、district、The geographical location of the nation
2015-02-22 Reading quantity 2887
introduction： Chinas refrigeration industry after decades of development，No matter the scale of production or the level of technology，Have improved a lot，It is also playing an increasingly important role in the national economy。 however，Because refrigeration equipment is widely used，Requirements vary from field to field。With the rapid development of various industries，The requirements for refrigeration equipment are also getting higher and higher。And so far，Chinas refrigeration industry still has three major shortcomings。 First, the introduction of foreign advanced technology can not be timely digestion and absorption。In the industrial field，Chinas refrigeration industry and foreign contact is relatively early。20century8
2015-02-22 Reading quantity 2873
introduction： Lost wax precision casting is now called investment precision casting，It is a precision casting process with little or no cutting，It is an excellent process technology in the precision casting industry，Its application is very wide。It is not only suitable for various types、Precision casting of various alloys，And the dimensional accuracy of the castings produced、The surface quality is higher than other precision casting methods，Even other precision casting methods are difficult to cast complex、High temperature resistance、Castings that are not easily machined，All can be cast by investment mold precision casting。 Investment mold precision precision casting is developed on the basis of ancient wax mold precision casting。As a
2015-02-22 Reading quantity 2780
introduction：abstersion one、Washing of glassware （one）、steep The new bottle should be cleaned briefly with tap water before use，Then use a dilute hydrochloric acid solution（５％）Soak overnight；The cultured glassware should be immersed in clear water immediately after use，Look out：Allow the water to enter the bottle completely，There should be no air bubbles left。 （two）、scrub Wash the soaked glassware with a brush dipped in detergent（Choose a soft brush and high-quality detergent，Such as high-grade laundry detergent or dish soap），Never use a detergent containing sand particles！Wash time
2015-02-22 Reading quantity 2780
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