Explosion proof turbine flow switch

1Explosion proof turbine flow switchProduct Overview
The new turbine flow meter with the characteristics of simple structure, lightweight, high precision, good reproducibility, sensitive response, easy installation, maintenance and use, and low power consumption is widely used for measuring the flow rate of non corrosive and low viscosity liquids in closed pipelines; If the physical properties of the medium are special, the turbine flowmeter can be calibrated with real liquid before use. If paired with display instruments with special functions, it can also perform quantitative control, over limit alarm, etc., making it an ideal instrument for flow measurement and energy conservation.

2、 Principle Introduction

Explosion proof turbine flow switchSpeed is a type of flow meter, and the sensor has a specially processed impeller inside. When the liquid flows through the sensor, it interacts with the impeller, pushing it to rotate. The external amplifier and impeller interact through electromagnetic coupling to monitor the rotation speed of the impeller, thereby calculating the liquid flow velocity. Further, the medium flow data is calculated based on the working conditions. The sensor is equipped with a built-in relay, and upper and lower limit alarm values can be set. It is adjustable on site and stable and reliable.

The UHLWGY turbine flow switch consists of a turbine, bearings, preamplifier, relay, and display instrument. The tested fluid impacts the turbine blades, causing the turbine to rotate. The rotational speed of the turbine changes with the flow rate, that is, as the flow rate increases, the rotational speed of the turbine also increases. The rotational speed of the turbine is then converted into electrical pulses of the corresponding frequency by a magneto electric conversion device, amplified by a preamplifier, and sent to a display instrument for counting and display. The instantaneous and cumulative flow rates can be calculated based on the number of pulses per unit time and the cumulative number of pulses.

The working principle of the Shanghai Youheng turbine flowmeter turbine transmitter is that when the fluid flows along the axis direction of the pipeline and impacts the turbine blades, a force proportional to the product of the flow rate qv, flow velocity V, and fluid density ρ acts on the blades, driving the turbine to rotate. While the turbine rotates, the blades periodically cut the magnetic field lines generated by the electromagnet, changing the magnetic flux of the coil. According to the principle of electromagnetic induction, a pulsating electric potential signal will be induced in the coil, and the frequency of this pulsating signal is proportional to the flow rate of the measured fluid. The pulse signal output by the turbine transmitter can be amplified by an amplifier before being sent to the display instrument for flow measurement.

3、 Product features of UHLWGY turbine flowmeter:
1. High precision, generally up to ± 1% RF, ± 0.5% RF, high-precision type up to ± 0.2% RF
2. Good repeatability, short-term repeatability can reach 0.05%~0.2%. It is precisely because of its good repeatability, such as the high accuracy obtained through regular calibration or online calibration, that flow meters are preferred for trade settlement
3. Output pulse frequency signal, suitable for total measurement and computer connection, no zero drift, strong anti-interference ability
4. Can obtain high frequency signals (3-4kHz) with strong signal resolution
5. Wide flow range, with medium to large diameters up to 1:20 and small diameters up to 1:10
6. Compact and lightweight structure, easy installation and maintenance, and high circulation capacity
7. Suitable for high voltage measurement, there is no need to open holes on the instrument body, making it easy to make high voltage instruments
8. There are various types of specialized sensors that can be designed according to the specific needs of users, such as low-temperature, bidirectional, downhole, sand mixing, etc
9. Can be made into an insertion type, suitable for large-diameter measurement, with low pressure loss, low price, can be removed without interruption, and easy installation and maintenance
10. Dual relays, adjustable alarm points

4、 Basic technical parameters of UHMC pure water/RO water measurement electronic flowmeter
1. Accuracy level ± 1% RF, ± 0.5% RF
2. Range ratio 1:10; 1:15； 1:20
3. Instrument materials include 304 stainless steel, 316 (L) stainless steel, etc
4. Temperature of the tested medium (℃) -20~+90~+120 ℃
5. Environmental conditions: temperature -10~+55 ℃, relative humidity 5%~90%, atmospheric pressure 86~106Kpa
6. Output signal pulse frequency signal, low level ≤ 0.8V, high level ≥ 8V
7. Power supply: 3.6V lithium battery,+12VDC,+24VDC (optional) 220VAC
8. There are multiple options for signal transmission lines, including two-wire, three wire, and four wire systems
9. Transmission distance ≤ 1000m
10. Signal line interface: M20 * 1.5, aviation plug, Husman connector, customizable
11. Explosion proof grade: ExdIICT6
12. Protection level IP65
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UHLWGY-15DK UHLWGY-25DK UHLWGY-50DK