Common meter scale classification and principle of introduction

Abstract: the common meter scale introduction of classification and principle of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. With the development of industrial production, the accuracy of flow measurement and scope of the demand is higher and higher, flow. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a common flow meter scale classification and principle of profile, the article details. In order to adapt to a variety of purposes, various types of flowmeter thereafter. Now in use of the flowmeter has more than 100 kinds. Each product has its specific applicability, also has its limitation. According to the principle of measuring points and strong principle principle, thermology, acoustics, electrical principle, optical principle, principle of atomic physics, etc. Classified according to the structure principle of the flowmeter: volumetric flowmeter, differential pressure flowmeter, flow meter, turbine flowmeter, electromagnetic flowmeter, flow oscillation flowmeter of vortex flowmeter and mass flowmeter and inserted into the meter. According to the measured object is divided into a closed tube and two kinds of open channel; According to the purpose and can be divided into the total measurement and flow measurement, the instrument called total table and flow meter, respectively. Total table measure the rate of flow of a period of time through the pipeline, in a short period of time through the total amount divided by the quotient of the time, said flowmeter actually also have accumulated flow devices, usually done using the volume table, table and total also have flow transmission device. Therefore, strictly to flowmeter and total table has no practical significance. One, according to the measurement principle of classification 1. Mechanics principle: belong to this kind of instrument is using Bernoulli's theorem of the principle of differential pressure type, the rotor type; Using the theorem of momentum impulse type, movable type; Using the Newton's second law directly quality type; Using the fluid momentum principle target type; Using the angular momentum theorem of the turbine; The use of fluid oscillation of the principle of spiral type, vortex street type; Using total static pressure difference of pitot tube type and displacement and weir, slot, and so on. 2. Electrical theory: for such instrument of the principle of electromagnetic, differential capacitive, inductive, strain resistance type, etc. 3. Acoustic type ( Shock wave type) And so on. 4. Thermal principle: by using the theory of thermal measuring flow with heat type, direct calorimeter, indirect calorimetry, etc. 5. Optical principle: laser type, such as photoelectric instrument belongs to such a principle. 6. 7. Other principle: marked principle ( Tracer principle, the principle of nuclear magnetic resonance) , the related principle, etc. Two, according to a principle of flow meter structure classification according to the actual situation of the current meter products, according to the principle of the structure of the flow meter, generally can be divided into the following several types: 1. Differential pressure flowmeter is based on differential pressure type flowmeter installation in pipe flow test to generate differential pressure, fluid known conditions and geometry size of test pieces and pipeline to calculate the flow meter. By a differential pressure type flowmeter device ( Detection) And the second device ( The differential transformation and flow display instrument) Composition. Usually in the form of test pieces classification of differential pressure flowmeter, such as orifice meter, venturi meter, velocity-equalizing tube flowmeter, etc. Secondary device for a variety of mechanical, electronic, mechanical and electrical one-piece differential pressure gauge, differential pressure transmitter and flow display instrument. It has developed into three ( The seriation, generalization and standardization) Degree is high, type specification of confused one kinds of instrument, it can measure flow parameters, and can measure other parameters ( Such as pressure, level, density, etc. ) 。 Differential pressure type flowmeter test according to the principle can be divided into: the throttle device, hydraulic resistance type, centrifugal, dynamic head type, type and fluidic dynamic pressure head gain a few broad categories. Test pieces and according to the degree of standardization is divided into two broad categories: standard and non-standard. The so-called standard test pieces is as long as according to the standard file design, manufacturing, installation and use, without the real flow calibration can determine the flow rate and the estimation error of measurement. Non standard test pieces is less mature degree, not yet on the international standard of test piece. Differential pressure flowmeter is a kind of flow meter, zui widely applied in all kinds of flow meters in its usage occupy the first place. In recent years, due to various kinds of new type flowmeter, its usage percentage gradually decline, but it is still an important class of zui flowmeter. Advantages: ( 1) Application zui orifice plate flowmeter firm structure, stable and reliable performance, long service life;

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