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Installation and use of V cone flowmeter

Categories:Company news
Time of issue:2021-11-30 13:42
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(Summary description)V cone flowmeter is a new type of differential pressure flowmeter which is made up of V cone flow sensor and differential pressure transmitter. It is a differential pressure flowmeter developed in 198

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Installation and use of V cone flowmeter

Categories:Company news
Time of issue:2021-11-30 13:42
Views:

Information

V cone flowmeter is a new type of differential pressure flowmeter which is made up of V cone flow sensor and differential pressure transmitter. It is a differential pressure flowmeter developed in 1980s to make up for the deficiency of orifice plate, nozzle, venturi tube and equal-speed tube. Its successful development is a qualitative leap of differential pressure flow measurement. It USES the throttling effect of V cone in the flow field to measure the flow rate by detecting the upstream and downstream pressure difference. Compared with ordinary throttles, it changes the throttling layout, changing from central orifice to annular throttling. It has been proved by practice that compared with other flow meters, the v-cone flowmeter manufactured by huahai measurement and control has the advantages of high long-term accuracy, good stability, small installation limitation, wear resistance, wide measuring range, small pressure loss and suitable for dirty medium. V cone flowmeter is widely used in petroleum, chemical industry, electric power, heating and other areas of national economy.

V cone flowmeter

Installation method

Measure liquid flow

(a) the differential pressure transmitter is preferably installed below the inner cone device (figure 1.1) to avoid the flow of liquid gas into the pressure pipe and transmitter.

(b) if the transmitter has to be mounted on top of the inside cone device (figure 1.2), a u-bend should be installed between the inside cone device and the pressure guide tube to reduce the flow of gas in the liquid, and the lower end of the elbow should be at least 1 meter below the center of the tube.

(c) on a horizontal or sloping pipe, if the pipe is mounted on the upper half of the cone device, gas will accumulate in the pipe and if the lower half of the cone device is installed, sediment will fall into the pipe. Therefore, the guide tube shall be drawn from both ends of the horizontal center line of the internal cone device, or less than 45 degrees from the horizontal downward

Installation diagram of v cone flowmeter 02

Measure steam flow

(a) in order to ensure that the transmitter is not affected by the high temperature of the steam, it is necessary before the transmitter and the internal cone device

Install two condensers at the same height and fill the condenser, pressure pipe and high and low pressure Chambers with condensation

Water to avoid the effect of high temperature on the transmitter.

(b) the differential pressure transmitter is preferably installed below the inner cone device (figure 2.1) to avoid gas

Enter the pressure pipe and transmitter. The condenser should be installed as close to the internal cone as possible.

(c) a if the differential pressure transmitter has to be mounted above the inner cone device (figure 2.2), the condenser should be removed

Install above the differential pressure transmitter.

(d) both installation methods are provided with a valve close to the transmitter for the blow-down pressure pipe. At the same time V cone flowmeter and condenser before the pressure tube should be added insulation layer.

V cone flowmeter installation schematic 01

Measure gas flow

(a) the differential pressure transmitter is preferably installed above the inner cone device (figure 3.1) so that it can be used in the guide tube

The resulting condensate flows back into the pipeline.

(b) if the transmitter has to be installed below the cone device (figure 3.2), in order to reduce water condensation

A u-bend should be installed on the guide tube drawn from the cone device and the end of the bent tube is at least higher than that of the tube

One meter in the center of the road.

Drawn from the half of the horizontal center line of the internal cone device.

(d) if there is dirt or dust in the gas, cross joint should be installed at the turn of the pressure pipe to facilitate

Wash or blow.

V cone flowmeter installation schematic diagram 03

faqs

1. No display or output after power on

1. The power is not added, or the power is positive or negative.

2. The main board of the differential pressure transmitter is damaged.

1. Correct power connection.

2. Replace the circuit board.

2. The display value of the differential pressure is large deviation, including leakage in the pressure pipeline, large time difference pressure of the general negative pressure end, and small time difference pressure of the positive and negative end.

1. Seal the leakage point.

2. Check the valve once.

3. Flow value display value is out of tolerance

1. There is leakage or blockage in the pressure extraction pipeline

2. Wrong setting of differential pressure transmitter parameters

1. Check the connection of positive and negative pressure tube and positive and negative pressure exhaust valve.

2. Check the internal parameters of the transmitter

Iv. Flow indication when there is no flow

1. The differential pressure works at the given value

2. Leakage at the negative pressure end

3. Display flow is below the lower limit

4. The differential pressure sensor is damaged