What are the differences in the use of V cone flow meters and vortex flow meters?

Project Overview

The main differences in use between V-cone flowmeters and vortex flowmeters can be compared from the following aspects:

1. How it works:

• V cone flow meter: Its working principle is based on the Bernoulli principle. When the fluid passes through a cone with the tip facing the direction of fluid flow, a pressure difference is formed before and after the cone. This pressure difference It has a certain functional relationship with the flow rate, so that the flow rate can be calculated. The V-cone flowmeter can adapt to a wider range of flow rates and has lower requirements for straight pipe sections.

  

• Vortex street. Flow meter: Based on the Karman vortex effect, when the fluid flows through a columnar object (vortex generator), vortices will alternately generate on both sides of the downstream side of the column. The vortex shedding frequency is proportional to the fluid flow rate. The flow rate can be determined by detecting the vortex frequency, and then Calculation flow needs to be relatively stable.flow regime and a long upstream straight pipe section to ensure measurement accuracy.

• Applicable working conditions:

  

• V cone flowmeter: suitable for high temperature and high pressure environments, can withstand temperatures up to 700°C and pressures of 42MPa. It is suitable for measuring fluids containing impurities or particles, but the pressure loss is large. About 10%~20%.

• Vortex flowmeter: suitable for the measurement of medium and low temperature, clean fluids, not suitable for high temperature and high pressure applications. , its resolution is low, and the instrument coefficient decreases as the pipe diameter increases. It is generally recommended that the pipe diameter does not exceed DN200.

• Accuracy and repeatability:

• V Cone flowmeter: Due to its design features, it usually provides higher measurement accuracy, especially in situations such as trade settlement where high-precision measurement is required.

  

• Vortex flowmeter: Although it has. It has good repeatability, but due to the limitations of the measurement principle, its measurement accuracy is relatively low, and it is more suitable for general measurement rather than high-precision applications.

• Maintenance and application. Installation:

• V-cone flowmeter: The structure is more complex and the maintenance cost may be higher, but because it can adapt to complex working conditions, it reduces frequent adjustments due to changes in fluid properties.

  

• Vortex flowmeter: The structure is relatively simple and easy to install and maintain, but due to higher requirements on flow patterns, more preliminary installation planning may be required.

• Application fields:

• V-cone flowmeter: widely used in high-temperature and high-pressure fluid measurement in petroleum, chemical, electric power and other industries, especially suitable for accurate measurement of steam flow.

• Vortex flowmeter: Commonly used in water treatment, heating, food processing and other industries, it is suitable for flow measurement of gases and liquids, especially in cost-sensitive applications that do not require extremely high precision. < /p>

In summary, the choice of V-cone flowmeter or vortex flowmeter should be comprehensively considered based on the working conditions, accuracy requirements, cost budget, fluid characteristics and other factors of the specific application. .