v-cone flowmeter

Introduction: V-cone flowmeter Overview: V-cone flowmeter is a throttling device that integrates the classic Venturi tube and annular orifice plate. Its theoretical principle is based on the Bernoulli equation of energy conservation and the flow continuity equation in a closed pipeline. Under stable flow conditions, the flow velocity in the pipeline

Overview of V-cone flowmeter:

The V-cone flowmeter is a throttling device that integrates the classic Venturi tube and annular orifice plate. Its theoretical principle is based on the Bernoulli equation of energy conservation and the flow continuity equation in a closed pipeline, and is used for stable flow

The flow velocity in the pipeline is proportional to the square root of the differential pressure. The V-cone flowmeter has low requirements for the installation of pipeline sections and low pressure loss, and can measure fluids containing particles, low-pressure fluids, high humidity gases, and various dirt and stains

Fluid utilizes the throttling effect generated by the V-cone in the flow field to measure flow rate by detecting the upstream and downstream pressure difference. Compared with ordinary throttling components, it has changed the throttling layout from a central orifice throttling to a circular one

Throttle,. Moreover, the V-cone itself serves as a rectifier for the flow field and has become a new type of flowmeter. The V-cone flowmeter, composed of a V-cone sensor and a differential pressure transmitter, can measure a wide Reynolds number (8 × 10)

The flow rate of various media within the range of 3 ≤ Re ≤ 5 × 107.

Technical parameters of V-cone flowmeter

1. Accuracy level: 0.5 level (differential pressure flow transmitter accuracy should be higher than 0.2 level, including 0.2 level), (β: 0.45-0.85, when β<0.55 and range ratio 4:1, accuracy level: ≤ 0.30)

2. Repeatability: 0.11%

3. Work pressure: 0-40MPa (with multiple pressure levels to choose from)

4. Working temperature: -40~851 ° C · Environmental temperature: -42~65 ° C

5. Installation requirements for straight pipe section: front 0-3D straight pipe, rear 0-1D straight pipe section. Range width ratio: usually 10:1, selecting appropriate parameters can achieve 50:1

6. Small pressure loss: For the same β value, the pressure loss is 1/3 to 1/5 of the orifice plate

7. Caliber ranging from DN25 to DN2000

Product features of V-cone flowmeter

1. Low installation requirements: front 0-3D straight pipe, rear 0-1D straight pipe section;

2. Range width ratio: usually 10:1, selecting appropriate parameters can achieve a higher ratio of 50:1;

3. Small pressure loss: For the same β value, the pressure loss is 1/3 to 1/5 of the orifice plate;

4. Wear resistance: After throttling the streamlined cone, a vacuum layer effect is generated on the surface of the cone, making it less prone to wear; 5. No blockage, no adhesion: The conical thorough blowing design avoids the retention of residues, condensates, or particles in the fluid;

6. Good long-term stability: The β value can remain unchanged for a long time and ensure long-term measurement;

7. High precision: 0.52 level;

8. Good repeatability: better than 0.122%;

9. Signal stability: "Signal fluctuation" is 1/10 of the orifice plate;

10. Wide range of beta values: The unique geometric shape of the V-cone flow sensor allows for a wide range of beta values;

11. Wide caliber range: DN25 to DN2000;

12. Measurable high temperature and high pressure media: working temperature is higher at 850 ℃, with a higher pressure of 40MPa;

13. Measurable dirty media (coke oven gas, blast furnace gas, raw oil, residual oil, etc.);

14. Measurable gas-liquid two-phase media (moisture, condensate, etc.);

Structural form of V-cone flowmeter

The V-cone flowmeter is divided into clamping type, universal type, large diameter structure, small diameter structure and other structural forms according to its structure. The specific forms are shown in the following figure: