Troubleshooting and explanation of some common problems in turbine flowmeters

Analysis of some common problems in turbine flowmeters: When using the turbine flowmeter, the measured liquid must be kept clean and must not contain impurities such as fibers and particles. When the turbine flow sensor is first used, the sensor must be slowly filled with liquid, and then the outlet valve must be opened. It is forbidden to subject the turbine flow sensor to the impact of high-speed fluid when there is no liquid. The maintenance cycle of the flow sensor is generally half a year. When checking and cleaning, special attention should be paid to not damage the measuring parts in the turbine flowmeter cavity, especially the impeller. When assembling, pay attention to the position relationship between the guide and the impeller. When the flow sensor is not in use, the internal liquid should be cleaned and protective covers should be added at both ends of the sensor to prevent dust from entering, and then stored in a dry place.

The filter should be cleaned regularly. If it is not in use, the liquid inside should be cleaned. Like the sensor, a dust cover should be installed to prevent dust from entering and stored in a dry place. The transmission cable of the turbine flowmeter sensor can be laid overhead or underground. Before the sensor is installed, it is connected to the display instrument or oscilloscope. After power is turned on, the impeller can be blown or pulled by hand to make it rotate quickly and observe whether there is any display. When there is a display, install the sensor.

In the case of a relatively dirty fluid or liquid that may produce gas in the turbine flowmeter measurement medium, in a relatively harsh working environment, it will cause the turbine flow sensor to malfunction or error, directly causing the flowmeter indication error. The error can be positive or negative, and may not be obvious, or it may fail completely. If you regularly measure and compare the relationship, if you find that the turbine flowmeter indication value is smaller under the same differential pressure gauge indication value, you will suspect that the turbine flowmeter has a fault.

When checking the turbine flowmeter sensor, check the transmitter in advance. If there are no other reasons, remove the turbine flowmeter from the process pipeline and conduct a further careful inspection. According to the reasons for the turbine flowmeter and the working experience in the field, a pair of pressure measuring ports should be added on the pipe wall of the upstream and downstream of the flowmeter at the beginning of the installation of the flowmeter, which are 2 times the pipe diameter. When necessary, they should be connected to the differential pressure gauge. Under working conditions, the comparison relationship between the indicated value of the turbine flowmeter and the differential pressure gauge is recorded.

The gas turbine flowmeter is a type of turbine flowmeter. Its working principle is to obtain the turbine speed through mechanical or electromagnetic induction methods, so as to obtain the flow rate of the gas turbine flowmeter. During the acceleration process of the gas guide body entering the turbine flowmeter, the accelerated gas acts on the blades of the turbine through the inlet channel. The impact of the gas will cause the turbine of the turbine flowmeter to rotate in the flow path. Within a certain flow range, the turbine speed is proportional to the volume of the gas flowing through.

The selection of turbine flowmeter under environmental conditions is also very important to consider the surrounding environment. Providing a good working environment for the turbine flowmeter is beneficial to improving the stability and working life of the flowmeter. If there is no display, check the relevant parts of the flowmeter to eliminate the fault. When there are impurities in the measured fluid, a filter should be installed. The mesh of the filter is determined according to the flow impurities.