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introduction：A pressure vessel made of prestressed concrete。20century50End of era﹐Prestressed concrete pressure vessel is used as the pressure hull of gas cooled reactor in France。Later, many countries have adopted prestressed concrete pressure vessels for gas cooled reactors﹐Design pressure is up6mpa。Due to the increasing size of steel pressure vessels for light water reactors and coal conversion﹐Increasingly difficult to make out of steel﹐There are also many difficulties in transportation﹐A feasibility study is being carried out to replace steel pressure vessels with prestressed concrete pressure vessels。Concrete has good compressive resistance﹐But the tensile property is very poor。In order to make concrete under tensile stress
2015-02-15 Reading quantity 2892
introduction： Yushowa, Japan9First produced by Mitsui Seiji tool microscope，Showa15The company has also entered the production of tool microscopes for factory use。The manufacturer of this product is also Mitotoyo Instrument Company。 Construction of tool microscope 1、Miniature tool microscope。 It is composed of precision cross moving table and observation microscope，It is a small tool microscope，Designed to be easy to use，So the struts dont tilt，The lighting equipment is also simple，Its easy but its connected to a lot of accessories，You can add a variety of measurements。 2、Large tool
2015-02-15 Reading quantity 2887
introduction： Made by Shanghai Xinrui CompanyRBRod type mixer（Screw type mixer）It is the introduction of foreign advanced technology、Design data、Development and development of mixing equipment，Be novel、、Energy conservation、pollution-free、New mixing equipment with ideal mixing effect。RBSeries of wire mixers are widely used in pharmaceutical industry、food、Chemical engineering、pesticide、pigment、plastic、rubber、Brew (wine, etc.)、metallurgy、mine、Cosmetics and other industries。Suitable for solid-Solid mixing、solid-Liquid mixing、Liquid-liquid mixing，Is a variety of powders、particle、lamellar、Fibrous and viscous liquid materials with high accuracy
2015-02-15 Reading quantity 2816
introduction：xinwanzhi Octane number octane number Index for evaluating the antiknock property of gasoline。The octane number was determined by contrast test。Isooctane with good knock resistance is specified in the determination［CH3C(CH3)2CH2CHCH3CH3］The octane number is100,Normal heptane(C7H16)The octane number is0,Isooctane and n-heptane are mixed into standard fuel in different proportions。When the antiknock property of the gasoline is tested％Isooctane and(100-)％The antiknock properties of the standard fuel of n-heptane are comparable,The octane number of gasoline is。The higher the octane number，The antiknock properties of gasoline
2015-02-15 Reading quantity 2793
introduction： How to maintain electric forklift truck 1、The vehicle is in bad condition、When working in places with difficult ventilation，It is recommended to implement forced ventilation of the controller。 2、Dont slow down when turning，You cant drive with an elevated load，Forklift overload，On the tilt、Soft ground driving, etc，The driver should try to avoid these unsafe operations when operating。 3、Clean the internal dust of DC motor regularly，Carbon inspection brush，spring。 4、If the electric forklift is not used for a long time, the battery should be fully charged and shelved，and
2015-02-15 Reading quantity 2777
introduction： Microbulking technology and equipment is my reference to the United States、New puffed food production line designed by puffing technology in Japan and other countries，The price of the equipment is only that of similar foreign products1/10。The microporous expanded product is characterized by full expansion、exquisite、Even and good taste。The raw material is granular grain and appropriate amount of powder material，Additive corn、Rice、Small red bean、Mung bean、Green bean、Potato flour，Puffing out a distinctive product，The extruded matter can also be crushed，Produce baby nutrition rice noodles。 Manufacturers can choose a complete production line or some equipment according to the conditions。 Microporous puffed food process
2015-02-15 Reading quantity 2904
introduction： The motor power of the powder discharging machine in a thermal power plant is220 kW，The voltage is6 kV。The motor shaft extension end is adopted2322ECylindrical roller bearings[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]，Non-axial extension ends are used6322Deep groove ball bearing。2004The motor is in operation，Shaft extension end bearing temperature sharp
2015-02-14 Reading quantity 1566
introduction：Forum polyvinyl chloride from plastics（PVCmarketplace）See such a post in the column，Feel good，To share with everyone： 1.htm Polyvinyl chloride is divided into four categories according to polymerization methods：Suspension polyvinyl chloride，Emulsion method polyvinyl chloride、Bulk method polyvinyl chloride、Solution method polyvinyl chloride。 Suspension polyvinyl chloride[polyvinylchloride(suwpensionpolymerization))It is one of the most productive varieties at present。According to the resin structure and divided into loose type and tight type two。tight
2015-02-14 Reading quantity 2779
introduction：RockwellA-BDiscussion and prospect of frequency converter Abstract:This paper describes in detail the current market demand of the domestic inverter industry，Market share of each brand，coalesceABThe marketing strategy put forward their own views。 Inverter is mainly used for AC motor（Asynchronous motor or synchronous motor）Regulation of speed，It is recognized as the most promising speed regulation scheme for AC motors，Because it not only has effective speed regulation performance，The frequency converter also has a significant energy saving effect。 2004years，China is like any other country，The energy crisis is emerging
2015-02-14 Reading quantity 2784
introduction：four、Stainless steel surface treatment method [method1] Common degreasing solvent：trichloroethylene、acetone、butanone、benzene、Ethyl acetate。 [method2] Remove grease after sand blasting or emery cloth polishing。 [method3] in70-85°CImpregnation in the following solution10min： Sodium silicate 6.4 Sodium pyrophosphate 3.2 Sodium hydroxide 3.2 Detergent powder 1 water 32 After washing in cold water，in93°Cdesiccation。 [method4] After degreasing
2015-02-14 Reading quantity 2880
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