是运用差压式皮托管的工作原理，插入式的安装方法，设计生成的一种流量计。 Detaba flowmeter is a kind of flowmeter designed and produced by using the working principle of differential pressure pitot tube and plug-in installation method. The pressure measurement method is through a probe with a diameter of about 20 mm. There are two rows of uneven pressure distribution holes of 8 mm in the front and back of the probe. The two rows of holes are used to average the different pressures from the top to the bottom of the pipe, forming a differential pressure, and the mass flow or volume flow can be calculated.
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. 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.
采用曲面设计，截面本身是对称的，曲面分为三部分（如右图），迎面部分为平滑段，使探头平滑地与介质接触；第二部分为加速段，将介质的流速平均加速三倍，通过增加与介质的接触面，提高迎面段的压力；第三部分为高低压分界尖峰，突然阻力消失，在探头后面形成低压区，实际的彩色速谱可以充分反映介质流速的变化。 2. Principle of measurement The average velocity tube Delta Taba flowmeter adopts a curved surface design. The cross section itself is symmetrical. The curved surface is divided into three parts (as shown on the right), and the facing surface is divided into smooth sections to make the probe smoothly contact the medium. For the acceleration section, the medium's flow rate is accelerated by three times on average, and the pressure on the oncoming section is increased by increasing the contact surface with the medium; the third part is the high and low pressure boundary spikes, and the sudden resistance disappears, forming a low pressure area behind the probe. The velocity spectrum can fully reflect the change of the medium velocity. Therefore, the design of the average speed tube Delta Taba flowmeter probe meets the requirements of small pressure loss and large differential pressure.
Third, characteristics 1, widely used in various dry or humid gases, liquids, steam and other media measurement;
2. The probe material has a special 1.4528 and Ha C4 alloy, which are specially targeted at various strong corrosive media;
3. The low-pressure aperture is 8mm, and the anti-blocking performance is good;
4. The cross section of the probe is symmetrical and can be measured in both directions;
5. Small pipeline power loss;
6. Small installation workload, free choice of integrated / split installation 4. Main technical parameters
1. Range ratio 1:30;
2. Under the condition of satisfying the straight pipe section, the accuracy can be as high as 0.5%.
3. The temperature range of the measured medium is -200 ℃ ～ 1200 ℃;
4. Working pressure can reach 69Mpa;
5. Meet the measurement of pipe diameter as large as 15 meters and as small as 15 mm;
V. Structural Form
是由检测杆、取压口和导杆组成，它横穿管道内部与管轴垂直，在检测杆迎流面上设有多个总压检测孔，分别由总压导压管和静压导压管引出，根据总压与静压的差压值，计算流经管道流量。 The LGD average speed tube delta taba flowmeter 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 total pressure detection holes on the upstream side of the detection rod. The total pressure impulse and static pressure impulse are led out, and the flow rate through the pipeline is calculated according to the differential pressure between the total pressure and the static pressure.