How to improve the accuracy of gas turbine flowmeter

Gas turbine flowmeter has the advantages of high sensitivity, good repeatability, wide range ratio and high precision. It has been widely used in natural gas trade settlement and measurement, and even as a standard instrument for quantity transfer. With the full development of China's urban gas engineering and the continuous improvement of gas commercial trade and handover measurement requirements, gas turbine flowmeters have gradually become one of the instruments for commercial gas trade and handover measurement in China.
The turbine flowmeter is a speed flowmeter that uses gas to drive the impeller of the flowmeter. The speed of rotation of the impeller is proportional to the volumetric flow of the fluid. According to the principle of electromagnetic induction, the magnetic sensor is used to induce the volume of the fluid from the synchronously rotating impeller. The pulse signal proportional to the flow rate is processed to obtain the volume flow rate. The measurement accuracy is high, the accuracy level can reach 1.0 level, 1.5 level; the range ratio is wide, generally 1:20 measurement range is wide; the structure is compact and light, the installation and maintenance are convenient, the requirements of the straight pipe section are low, and can be used for medium and high pressure measurement. .
Turbine flowmeters also have the following disadvantages: there are movable parts, which are easy to damage, the bearing of the key parts is easy to wear, the dirt resistance is poor, the cleaning degree of the medium is high, and it is difficult to maintain the calibration characteristics for a long time, and regular calibration is required. The causes of the error are: the quality of the meter itself, the design selection is unreasonable, the installation is not in place, and the maintenance during operation is improper.
How to control the error? Correctly determine the location and specifications of the flowmeter. Due to the inertia of the turbine flowmeter turbine, it is not suitable to use in the case of frequent flow fluctuations, otherwise the measurement accuracy will be reduced. To accurately estimate the peak-to-valley value of the gas volume and the pressure of the medium, the flowmeter specifications are correctly determined.
The filter must be installed before the gas turbine flowmeter; the filter should be kept clear. If the filter is found to be clogged (can be judged by the pressure difference between the filter inlet and outlet), the filter should be cleaned in time, if not equipped with a differential pressure gauge Clean once a month. To ensure the requirements of the straight pipe section, especially in the case of a reduced diameter or a half open valve in front of the table. During installation, the gasket shall not protrude into the pipeline, and the flowmeter and the pipeline axis shall not be visually inspected and shall not cause installation stress. Always clean all impurities in the pipe during installation to prevent the bearing and turbine from getting stuck.

Single-Column Automatic Lifting Hopper Blender

The Single-Column Automatic Lifting Hopper Blender is composed of column, machine base, rotation crotch, driving system, braking system, control system, etc. Push the mixing hopper into the rotation crotch and lock the nuts. Start the control system to lift the hopper to the mixing height and position it reliably. The driving system will carry out automatic mixing according to the set time, rotation speed and other data. After the mixing operation is finished, the rotation crotch will stop vertically, the hopper will automatically fall to the ground, the machine will stop and process data will be printed. Loosen the locknuts of the rotary crotch and push the hopper out and transfer it to the next procedure.


Application:


The machine is provided with such functions as automatic lifting, mixing, lowering, etc. A hopper mixer and several mixing hoppers of different specifications can meet the mixing requirements of diversified varieties and different batches of products. It is an ideal machine for mixing in pharmaceutical plants. It is also widely used in such industries as medicine, chemical industry, food, etc.


Features:


The machine is a new machine researched and developed successfully by our company according to China's actual conditions after absorbing and digesting internationally advanced technology. After mixing is finished, the hopper can continue to rise to the required height to facilitate discharging. The machine has such features as reasonable structure, stable performance, convenient operation, no dead corners, and no exposed bolts. The gyrator (mixing hopper) forms an included angle of 30° with the rotation axis. The materials in the mixing hopper rotate along with the gyrator and make tangential movement along the hopper walls, producing strong turning and high-speed tangential movement and achieving the best mixing effect. PLC automatic control is adopted. It is provided with the infrared safety device and the discharging butterfly valve with the misoperation preventer to ensure safe production. The materials can go through different working procedures in the same vessel without the need of frequent material transferring, material charging, etc. The machine effectively controls dust pollution and cross contamination, reduces loss of materials, controls material layering, optimizes production processes, and fully meets the requirements for medicine production in GMP.

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Jiangyin Jirui Machinery Manufacturing Co,LTD , https://www.jyjiruimachine.com