Ring the comparison of orifice meter and V cone flowmeter
In this article, under the henan SIKE measurement and control technology co., LTD. Introduction to Ring the comparison of orifice meter and V cone flowmeter. Both the structure of the flowmeter has the similarities and differences.
(1) both belong to the "annular channel" type, has self-cleaning function and flow of automatic adjustment function, thus can be used in the field straight pipe length is insufficient, the occasion of the fluid contains impurities.
(2) both based on the principle of fluid equations, so traffic is proportional to the square root of the differential pressure signal, that is the size of the flow range is associated with the range of differential pressure transmitter. If the differential pressure transmitter with digital communication function, can range up to 10 times more than.
(3) both with a measuring short tube, can and the process pipe flange connection or directly butt welding, installation error effect on the accuracy of measurement.
(4) Ring the comparison of orifice meter and V cone flowmeter under the condition of the same opening ratio, the differential pressure signal is small and small pressure loss, small energy consumption, more suitable for measuring large flow liquid medium or gas medium, while the former is more suitable for small lateral flow gas medium or liquid medium.
(5) V cone flowmeter detecting is cone, cone Angle, the size of the largest cone section of the axial length and the position of the downstream take pressure directly affect the traffic flow parameters such as coefficient of, at present each big manufacturer according to the principle of "pursuit of real flow calibration".
(6)Ring the comparison of orifice meter throttling device with standard orifice throttling of the structure characteristics and its application in the media, and other orifice is no different from, and can adapt to gas, liquid and steam medium and the function it has the characteristics of strong, easy installation, and in other ways such as:
1. Can be suitable for the measurement of saturated gas, steam or gas, because of its high temperature, so at the time of measurement strategy in certain difficulty, can show the biggest advantage of this time. In addition also has a very good measure for debris flow.
2. On the performance of the work is more stable, but also more on getting data reliability, it is also is better than other types of orifice plate.
3. Able to measure some strong corrosive fluid, some stale or strong chemical corrosive fluids at the time of measurement, it is easy to corrosion of the flowmeter, but if you use this kind of Ring the comparison of orifice meter, is not appear this phenomenon, the formal because all use is the corrosion resistance of the material.
4. Reduce the flow of error, for traffic, actually it at the time of measurement, is far more complicated than the other way, so there are a lot of flowmeter is prone to error, but this kind of Ring the comparison of orifice meter is used for a variety of parameters, this also let error is minimized, thus can get the most accurate traffic data.
5. The operation is simple. Ring the comparison of orifice meter is a body structure, so no matter in the installation or operation, facilities, pipe, line less it at the time of installation and the operation more simple. Both can meet the requirements of the majority of users, and can greatly reduce the cost.
(7) V cone flowmeter downstream from the position of the retainer in the rear section of the cone, here is the impurity, impurity easily into the downstream pressure inside the tube. Tutorial of the alumni to take pressure tube and a corner, is not easy to clean, and so V cone flowmeter is not available for smudgy fluid. And protect dark star orifice throttling device with mouth open on the wall, not easy jam, even congestion is easy to clean, can in the smudgy fluid reliable work.
According to the comparison, the two meter belongs to the throttle device, each have advantages and disadvantages, should be the actual situation, a reasonable choice. Both use scope is as follows.
❶ V cone flowmeter pressure loss is small, but the outflow coefficient is larger, the same flow time pressure is small, suitable for large flow; Ring the comparison of orifice meter on the contrary, suitable for small flow rate.
❷ V cone flowmeter test piece is the cone, the volume is larger, dirt adhesion on the cone is not easy to clean, and Ring the comparison of orifice meter test piece is a piece of sheet, smudgy few adhesion and easy to clean, more suitable for use in smudgy or miscible liquids.
At present, the technology of the flow meter communication attention to V cone flowmeter is more, too much emphasis on its advantages such as large range, high precision, in inappropriate places (such as dirt, fluid viscous liquid) also recommend it to V cone flowmeter to promote the negative impact of misleading. The Ring, on the other hand, the comparison of orifice meter promotion is still inadequate.
Ring is introduced in detail in this paper the comparison of orifice meter and the comparison of V cone flowmeter, Ring the comparison of orifice meter in the contour structure and the pressure setting with a small loss of pressure, differential pressure signal of strong, high measurement precision, dirt resistance and other advantages, is especially suitable for large caliber, smudgy fluid flow measurement.