Explanation of the installation process of the economical turbine flowmeter 01A oil gauge???

The measuring principle of the turbine flowmeter is that the fluid flows through the sensor housing, because the blades of the impeller have a certain angle with the flow direction, the impulse of the fluid makes the blades have a rotating torque, and the blades rotate after overcoming the friction torque and fluid resistance, and the speed is stable after the torque is balanced, under certain conditions.

The sensor can be mounted horizontally or vertically, and the fluid direction must be upwards when installed vertically. The liquid should fill the pipe and there should be no bubbles. When installed, the direction of liquid flow should coincide with the direction of the arrow indicating the flow direction on the sensor housing.

The upstream end of the sensor should have at least 20 times the nominal diameter of the straight pipe section, and the downstream end should not be less than 5 times the nominal diameter of the straight pipe section, and its inner wall should be smooth and clean, free of dents, fouling and peeling and other defects. The pipe axis of the sensor should be aligned with the adjacent pipe axis, and the gasket used for connecting the seal should not penetrate deep into the pipe cavity.

The sensor should be kept away from external electric and magnetic fields, and effective shielding measures should be taken if necessary to avoid external interference. In order not to affect the normal delivery of liquids during maintenance, it is recommended to install a bypass pipe at the installation site of the sensor. When installing the sensor in the open air, make sure that the amplifier and plug are waterproof.

When the fluid contains impurities, a filter should be installed, and the filter mesh is determined according to the flow impurities, generally 20 60 mesh. When the fluid is mixed with free gas, a degasser should be installed. The entire piping system should be well sealed.

The user should be fully aware of the corrosion of the measured medium and strictly prevent the sensor from being corroded.

Many turbine flowmeters in China can be installed on the hose and threaded.

Precautions for installation of turbine flowmeter:

1. The sensor installed horizontally of the turbine flowmeter requires that the pipeline should not have a visual and perceptible inclination (within 5°), the vertical deviation of the vertically installed sensor pipeline should be less than 5°, and the fluid direction should be downward and upward.

2. In places where the flow cannot be stopped, bypass and shut-off valves should be installed. If the fluid contains impurities, the filter should be installed on the upstream side; If gas is contained, a degasser should be installed on the upstream side. The blowdown and air vents of filters and deaerators should lead to a safe place.

3. The flow control valve should be installed downstream of the sensor, and the upstream shut-off valve should be fully open during measurement, and there should be no vibration and leakage. For processes that may produce reverse flow, a check valve should be added to prevent the fluid from flowing in the opposite direction.

4 The sensor should be concentric with the pipeline, and the sealing gasket should not protrude into the pipeline. The sensor should not be at the highest point of the horizontal pipeline, so as to prevent the gas accumulated in the pipeline (such as mixing air when the flow is stopped) from staying at the sensor, which is not easy to discharge and affect the measurement.

5. The front and rear pipes of the sensor should be firmly supported and do not vibrate. For condensable fluids, insulation measures should be taken for the sensor and its front and rear pipes.

Shenzhen AVIC Automatic Control System (Shenzhen AVIC Computer Intelligent System) electromagnetic flowmeter.

Install a turbine flow meter, and the sealing gasket between the flanges should not be recessed into the pipe. Requirements for bypass pipes: In order to ensure that the normal use of the medium is not affected during the maintenance of the flowmeter, shut-off valves (globe valves) should be installed on the front and rear pipelines of the flowmeter, and bypass pipes should be set up at the same time.

Requirements for straight pipe sections: It must be installed horizontally on the pipeline (the pipeline inclination is within 5), and the axis of the flowmeter should be concentric with the pipeline axis during installation, and the flow direction should be consistent. Requirements for the external environment:

The turbine flowmeter is best installed indoors, and when it must be installed outdoors, it must be sunscreen and rainproof. lightning protection measures so as not to affect the service life.

Eddy current flow meters must be installed in such a way as to keep measurement errors to a minimum, which can be caused by eddy currents caused by high flow rates or damage to moving parts.

It is also advisable to install a filter upstream of the vortex flow meter to trap any impurities that could damage the moving parts. In order to avoid possible flashing or cavitation, adequate back pressure should also be ensured.

Eddy current flowmeters, combined with the measurement dynamics of turbine instruments, make eddy volume measurements robust and reliable by requiring the shortest upstream and downstream distances.

Using digital signal processing (DSP) and advanced filtering techniques, these innovative flow meters from ABB improve the detection of flow signals and provide measurement immunity to the effects of hydraulic noise and pipe vibration.

Measuring the flow rate is the flow condition in the pipes upstream of a meter.

Flow conditions primarily refer to the flow velocity profile, irregularities in the profile, varying degrees of turbulence in the flow velocity or turbulence intensity profile, swirling, and other fluid flow characteristics that will result in a different flow rate than expected on the meter. It will change the value of the original calibration state, called the reference condition, and will not be affected by the installation.

1.Before installing the turbine flowmeter, the pipe should be cleaned. When the medium to be measured is not clean. A filter should be added to the upstream of the pipeline, otherwise the turbine and bearing are easy to be stuck and the flow rate cannot be measured.

2.The power cord of the transmitter is made of metal shielded wire, and the grounding should be good and reliable. The power supply is DC 24V, 650 impedance.

3.The transmitter should be installed horizontally, avoid vertical installation, and ensure that there are suitable straight pipe sections in front and back, generally 10d in the front and 5d in the rear.

4.Ensure that the flow direction of the fluid is consistent with the direction of the arrow of the instrument housing, and must not be reversed.

5.The measured medium must not have a corrosive effect on the turbine, especially at the bearing, otherwise measures should be taken.

6.The instrument coefficient is set before it is put into operation. Carefully check to make sure that the instrument wiring is correct and the grounding is good before power can be transmitted.

7.Install the turbine flowmeter, and the front and rear pipe flanges should be horizontal, otherwise the pipeline stress will have a great impact on the flowmeter.

8.Disassemble and assemble the flow meter, and pay attention to the magnetic induction part can not collide.

The turbine flowmeter has threaded connection, clamp connection, flange connection, and parameter consultation Qingdao Xinbo.

Gas turbine flowmeter installation and use:

Before installation, the pipeline must be cleaned to prevent the residue of iron filings from affecting the normal operation of the flowmeter.

Before installation, when the turbine is blown with a small air flow, the turbine can rotate flexibly, there is no irregular noise, the counter rotates normally, and there is no intermittent stuckness, then the flowmeter can be installed and used.

When the flowmeter is installed, a sealing gasket should be added between the flange and the pipe flange.

The flowmeter should be installed before the filter, the temperament of the dirty occasion should be installed oil filter, the user ordered, can be ordered to our company at the same time, it is strictly forbidden to directly connect the filter and the flowmeter.

The flowmeter should be installed with a shut-off valve before and after.

There should be no protrusions in the inner meridian of the pipe at the flange connection.

When the flowmeter is installed, it is strictly forbidden to directly weld at its inlet and outlet flanges to avoid burning out the internal parts of the flowmeter.

The flowmeter should be installed in a place that is easy to maintain, free of strong electromagnetic field interference, free of mechanical vibration and the influence of thermal radiation;

The flowmeter should not be used in the occasion of frequent interruption of flow and strong pulsating flow or pressure pulsation;

When the flowmeter is installed outdoors, the upper part should be covered to prevent rainwater infiltration and scorching sun exposure from affecting the service life of the flowmeter;

The flowmeter can be installed horizontally or vertically, and the direction of fluid flow should be consistent with the direction marked on the shell, and the straight pipe section of not less than 10dn should be ensured in the upstream of the flowmeter, and the straight pipe section of not less than 5dn behind the meter.

In order not to affect the normal transportation of fluid, it is recommended to install the bypass pipeline according to Figure 2, and the bypass pipeline valve must be closed during normal use.

During pipeline construction, the installation of telescopic pipes or bellows should be considered to avoid serious stretching or fracture to the flowmeter;

The connection between the pipeline and the inlet and outlet of the flowmeter should be coaxial, and the gasket and weld should be prevented from protruding into the pipeline, otherwise the flow profile will be disordered;

When using an external power supply, the flowmeter must be reliably grounded, but it must not share the ground wire with the strong current system; During pipeline installation or maintenance, the ground wire of the welding system shall not be overlapped with the flowmeter;

When the pipeline is installed and the sealing pressure test is carried out, attention should be paid to the maximum pressure that the flowmeter pressure sensor can withstand (that is, the maximum pressure of the medium on the verification certificate) to avoid damage to the pressure sensor.

The turbine speed is directly proportional to the flow rate, just like the windmill, the stronger the wind, the faster the speed, as long as the speed is measured, it can be converted to the flow rate.

It is easy to get stuck in the solid things in the fluid, which makes the blades rotate unsmoothly and affects the accuracy. The impeller must be replaced frequently, and the graphite inside the impeller wears out due to long-term rotation.