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What are the product advantages of vortex flowmeter and orifice flowmeter

Author:    Source:    Date: 2021-06-01 14:47:34
1. The current technical level of vortex flowmeters and orifice flowmeters
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The main basic structure of the vortex flow is composed of a vortex generator, a detection element, and a signal processing amplifier circuit. The current research on the vortex generator is quite complete. The triangle generator is the best type. The detection elements include thermistors, Strain gauges, piezoelectric crystals, differential capacitors, ultrasonics, etc. The signal processing part has a lot of microcomputerization. The vortex path is easy to install and can be installed directly on the pipeline. Small size, strong interchangeability, high precision for long-term operation, suitable for measurement of many liquids, gases and steam. At present, the sales of vortex flow meters in the world market are increasing by about 30% every year.

   The current technological development level of orifice flowmeters is based on a certain empirical formula. In 1980, the International Organization for Standardization merged the two standards of R541 and R781 into the standard iso5167 (1980).

Due to its simple structure, low cost, and high reliability, the throttling device can be applied to almost all media measurement, but the differential pressure transmitter combined with it has developed rapidly and can make up for its own shortcomings.

   2. Comprehensive performance evaluation of vortex flowmeter and orifice flowmeter

Throttle flowmeter (orifice for short) is composed of a pressure relief device of the orifice and a differential pressure transmitter. The pressure guiding tube needs to take measures to generate heat in the place that is easy to freeze, and a static sealing point of the flow measurement loop It is about 20, and there are the following problems in use.

It is easy to freeze, block, and leak, and the pressure difference transmitter device is easy to deteriorate due to heat. Sometimes it is necessary to put an isolating liquid in the pressure guiding tube. The process operation is unstable due to heat, so the isolating liquid pipeline of the positive and negative pressure guiding pipes Often different, resulting in a liquid column difference

   All the above are changes in the flow coefficient and the measurement accuracy is reduced. The trachea is shortened and the pressure guiding tube is directly installed on the trachea with a differential pressure transmitter, but there is a dead zone for flow.

   Vortex Flowmeter (referred to as Vortex Street) has only 3 static sealing points, it is not easy to leak, has no flow dead zone, does not need to be heated and insulated, and is not affected by fluid gravity, temperature, pressure, viscosity, etc., and its flow coefficient remains unchanged for a long time.

   However, when the vortex circuit is used under vibration, the flow measurement will be incorrect. At present, the vibrating eddy current circuit has been launched on the market, which overcomes the influence of inaccurate flow measurement caused by vibration. 1. The current technical level of vortex flowmeters and orifice flowmeters

The main basic structure of the vortex flow is composed of a vortex generator, a detection element, and a signal processing amplifier circuit. The current research on the vortex generator is quite complete. The triangle generator is the best type. The detection elements include thermistors, Strain gauges, piezoelectric crystals, differential capacitors, ultrasonics, etc. The signal processing part has a lot of microcomputerization. The vortex path is easy to install and can be installed directly on the pipeline. Small size, strong interchangeability, high precision for long-term operation, suitable for measurement of many liquids, gases and steam. At present, the sales of vortex flow meters in the world market are increasing by about 30% every year. The current technological development level of orifice flowmeters is based on a certain empirical formula. In 1980, the International Organization for Standardization merged the two standards of R541 and R781 into the standard iso5167 (1980).

   Because the orifice plate device has the advantages of simple structure, low cost, and high reliability, it can be applied to almost all media measurement, but the differential pressure transmitter combined with it has developed rapidly and can make up for its own shortcomings.

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