属于均速管流量计的一种，是一种插入式流量测量仪表，即在管道中插入一根德尔塔巴传感器，当流体流过传感器时，在其前部迎流方向产生一个高压分布区，在其后部产生一个低压分布区。 Delta Taba flowmeter belongs to a type of averaging tube flow meter. It is a plug-in flow measuring instrument, that is, a Delta Taba sensor is inserted into the pipe. When the fluid flows through the sensor, it flows in the front direction of the sensor. A high-pressure distribution area is created, and a low-pressure distribution area is created at the rear. Delta Taba flowmeters are widely used: they can be used to measure dry gas, humid gas, liquid or vapor media without being limited by dielectric constant.
Delta Tab flowmeter principle introduction:
The Delta Taba flowmeter is a device for measuring flow rate based on the differential pressure principle. It is developed on the basis of the pitot tube flow rate measurement principle. Measures the flow of fluids such as liquids, gases and steam. Because there are no moving parts, there is almost no pressure loss, convenient installation and maintenance, and extremely low operating costs, which is favored by users.
The Delta Tab flow sensor is composed of a detection rod, a pressure taking port and a guide rod. It crosses the interior of the pipeline and is perpendicular to the tube axis. There are multiple pressure measurement holes on the upstream surface of the measurement rod to measure the average total pressure. The back and side flow surfaces are provided with static pressure measuring holes, which are respectively led out by the total pressure impulse pipe and the static pressure impulse pipe, and the flow rate through the pipeline is calculated according to the differential pressure value of the total pressure and the static pressure. The static pressure on the backflow surface of the sensor can also be replaced by the static pressure on the wall of the flow tube.
Delta Barrel Speed Transmitter Flow Transmitter is a flow meter composed of sensors, plenum accessories and differential pressure transmitters, pressure transmitters, flow totalizers and other supporting components. Delta bar averaging tube flow sensors are equipped with differential pressure transmitters, pressure transmitters, temperature transmitters and flow totalizers to form various types of flow measurement systems.
Delta Taba flowmeter is a plug-in flow measurement instrument. A delta-bar sensor is inserted in the pipeline. When the fluid flows through the sensor, a high-pressure distribution area is generated in the forward flow direction of the sensor and a low-pressure distribution area is generated at the rear. The pressure taking method is through a probe (or probe) with a diameter of about 20 mm, and there are two rows of 8 mm impulse pressure holes unevenly distributed in front and back of the probe. Through the two rows of holes, the different pressures (/ flow rates) of the pipe from top to bottom (/ left to right) are averaged in the hole (because the flow velocity on the two sides of the pipe is slow and the middle is fast) to form a differential pressure, which can be calculated Out of mass flow or volume flow.
特点： Two Delta Taba Flowmeter Features:
Wide application: can be used to measure dry gas, humid gas, liquid or steam medium, without being limited by dielectric constant.
Small pipeline power loss (small pressure loss): The design of the Delta Tab probe meets the requirements of small pressure loss and large differential pressure.
High accuracy: Under relatively short straight pipe sections, it can reach 2% accuracy. The straight pipe section that achieves 1% accuracy is much shorter than ordinary products, such as maintaining high accuracy for a long time.
Low operating cost: The small pressure loss makes the power loss in the pipeline small. Generally speaking, the operating cost of the averaging tube is only one tenth of that of the orifice plate.
Small installation workload: The plug-in working method has the characteristics of simple installation. Make a small hole in the pipeline with a diameter of 28 ~ 54 mm, and then weld the probe tube to the pipe
Large holes are not easy to block: For flue gas measurement or gas / liquid measurement with particles, if the dust in the medium is not more than 130mg / m3, Deltaba's probe does not need any maintenance and purging.
技术参数： Technical Parameters of Three Delta Taba Flowmeter :
1. Specification: DN25-DN6000 (mm)
2. Measurement accuracy: ± 1.0%, ± 1.5%, ± 0.5%; repeatability: ± 0.1%;
3. Range ratio: 3 0: 1 two-way measurement
4. Pressure: 1.6 ~ 25MPa;
5. Fluid temperature: ≤650 ℃;
Probe material stainless steel (1.4571, standard probe); 1.4828 (high temperature resistant material); 1.4539, Hastelloy C4, Haynes alloy (for corrosive media with oxidizing); 15Mo3, 10CrMo910, 13CrMo44, x20CrMov121, P91 (various boilers) steel)