Nevin venturi tube flow meter scale structure and measuring principle

Abstract: the text venturi tube flow meter scale structure and measuring principle of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1, lead differential pressure flowmeter, as a traditional means of measurement has nearly hundred years of development history, it is still used today zui more industrial on-line flow measurement instrument. The throttle used by a differential pressure type flowmeter, mainly is the standard orifice, nozzle and high. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the text venturi tube flow meter scale structure and measuring principle, the article details. 1, lead differential pressure flowmeter, as a traditional means of measurement has nearly hundred years of development history, it is still used today zui more industrial on-line flow measurement instrument. The throttle used by a differential pressure type flowmeter, mainly is the standard orifice, nozzle and venturi tube [ 1] 。 In view of the technical performance of throttling there are shortcomings, in order to adapt to the needs of real industrial metrology, people have invented several orifice, nozzle based retrofit throttling parts, such as circular orifice, conical inlet orifice plate, a quarter of a round hole plate ( Nozzle) And wear-resistant orifice [ 2] , wedge flowmeter and V - Cone Cone flowmeter, etc. The retrofit throttling parts under the condition of a particular measure can make up for some deficiencies of standard throttling parts in terms of technical performance, but are of great use limitations, measurement accuracy is low, V - the United States Cone flowmeter is a kind of performance is relatively good retrofit throttling, but because of & other Sharp edges abrasion & throughout; Due to the outflow coefficient instability problem is still not completely solve. Nevin venturi tube is a modification of the traditional venturi tube made of different venturi tube, it sets the circular orifice plate, wear-resistant orifice plate and the advantages of venturi tube at an organic whole, its technical performance is superior to the orifice, nozzle and classical venturi tube, is superior to other existing various retrofit throttling. Nevin, venturi tube flowmeter is a unique properties of a new generation of differential pressure type flow measuring instrument, in the industrial measurement trial has achieved good using effect. 2, the structure and measuring principle 2. Nevin venturi tube tube is measured by the round 1 and anti-crack inserted in measuring core body 2. Spy core body is a body of revolution, and the measuring tube coaxial the bus bar is an imaginary wall for classic infinite thin truncated axial cross section of venturi tube wall, the body of revolution of the radial surface by the front cone surface, middle cylinder 7, paragraph 6 tapered surface of 8. Special core body by 9, 10, and the supporting shaft and measuring tube coaxial bearing ring 3, 4, with brake a fixed clamping ( Small diameter products, excellent supporting shaft, only rear axle by supporting ring after positioning fixed) 。 Bearing ring is composed of a coaxial inner ring and outer ring and outer ring of the 3 - into an organic whole repeatedly Four supporting ribs. In the measurement of pipe wall on the specific location take pressure joint has 5 ( Or far eastone flange pressure interface) , measurement on both ends of the tube is used for standard flange connected with the process piping. 2. 2 in terms of the basic measuring principle, text venturi tube and classical venturi tube measuring principle of conventional differential pressure type flow meter are exactly the same, is based on the law of conservation of energy & ndash; — 'Efforts to flow equation and continuity equation on the basis of the flow measurement methods, the basic amount of direct measurement is still the throttling parts before and after the differential pressure. As special core in vitro between surface and the measuring tube surface to form a circular cavity diameter ( Annular clearance) , the axial flow surface of the annular cavity change rule and classical venturi similar, this makes the fluid flowing through the text venturi tube when the flow changes and the throttling process beam with fluid flowing through the variation of flow beam in classical venturi tube and throttling process is basically the same. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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