对传统节流装置进行了极大的改进，具有平衡整流的显著特征。 DXPH series balanced flowmeter has greatly improved the traditional throttling device, and has the remarkable characteristics of balanced rectification. 有多个函数孔径，能最大限度地把流场平衡整流成理想流体，从而将差压式流量计的优势发挥的淋漓尽致。 The traditional throttling device has only one flow aperture, and the fluid loses its ideal state after throttling. The balanced flowmeter has multiple function apertures, which can balance the flow field into an ideal fluid to the maximum extent, thereby reducing the pressure of the differential pressure flowmeter . Give full play to the advantages. 几乎适用于所有流体测量，是流体测量技术的一场革命，目前平衡流量计已经广泛应用到石油、化工、冶金、电力、天然气、水处理等行业。 The balanced flow meter is suitable for almost all fluid measurement. It is a revolution in fluid measurement technology. At present, the balanced flow meter has been widely used in petroleum, chemical, metallurgy, power, natural gas, water treatment and other industries.
是一种革命性的差压式流量仪表，其工作原理与其他差压式流量计一样，都是基于密封管道中的能量转换原理：在理想流体的情况下管道中的流量与差压的平方根成正比；用测出差压值根据伯努利方程即可计算出管道中的流量。 Balance flow meter is a revolutionary differential pressure flow meter. Its working principle is the same as that of other differential pressure flow meters . It is based on the principle of energy conversion in sealed pipelines. The square root of the pressure is proportional; the measured flow pressure can be used to calculate the flow rate in the pipeline according to the Bernoulli equation. 数据而定制的，称为函数孔。 The balanced flow sensor is a porous disc throttle rectifier, which is installed on the cross section of the pipeline. The size and distribution of each hole are customized based on special formulas and test data, called function holes. When the fluid passes through the function holes of the disc, the fluid will be balanced and rectified, and the vortex will be minimized to form an approximately ideal fluid. A stable differential pressure signal can be obtained through the pressure taking device. Mass Flow.
的特点 Characteristics of balanced flowmeter
1. Measurement accuracy is 5-10 times that of standard orifice plate
2. Flow noise is 1/15 of standard orifice plate
3.The permanent pressure loss is 1/3 of the standard orifice plate
4.Pressure recovery is 2 times faster than standard orifice plate
5.The minimum straight pipe section can be less than 0.5D
First, high linearity and good repeatability
属于高档流量计行列。 The balanced flow sensor has the characteristics of symmetrical porous structure, which can balance the flow field, reduce eddy current, vibration and signal noise, greatly improve the stability of the flow field, make the linearity 5 to 10 times higher than the orifice plate, and improve the repeatability 54 % Is 0.15%. From its comprehensive performance, balanced flowmeters belong to the ranks of high-end flowmeters .
5: 1 range ratio, linearity can reach ± 0.3%;
7: 1 range ratio, linearity can reach ± 0.5%;
10: 1 range ratio, linearity can reach ± 1.0%
2. Low requirements for straight pipe sections
The balanced flow sensor has a stable flow field, and the pressure recovery is twice as fast as the orifice plate, which greatly shortens the requirements for straight pipe sections. The straight pipe sections before and after are generally 3D before 1D, and the minimum can be less than 0.5D, thereby eliminating a large number of straight pipe sections. , Especially pipes of particularly expensive materials.
Third, reduce permanent pressure loss
The porous symmetrical balance design reduces the formation of turbulent shear forces and vortices, and reduces the loss of kinetic energy. Under the same measurement conditions, it reduces the permanent pressure loss by 2.5 times compared with the orifice plate, thereby saving considerable The large operating energy cost is an energy-saving instrument, which is worthy of extensive promotion.
Fourth, dirt resistance is not easy to block
The porous and symmetrical balance design reduces the turbulent shear force and the formation of eddy currents, thereby greatly reducing the formation of stagnant dead zones, ensuring that the dirty medium smoothly passes through multiple holes, and reducing the chance of fluid holes being blocked.
Five, can directly replace the orifice plate
It has the same use method and appearance as the orifice plate, so it can be replaced directly without any changes in piping and related instruments. It is very suitable for changing the orifice plate to a balanced flow meter in the whole plant energy measurement transformation
Wide flow measurement range
的性能，使其流速可以从最小到音速；其最小雷诺数可低于200，最大雷诺数大于107；β值可选0.25～0.90。 According to the test results, we learned that: the performance of the flow meter is balanced so that the flow rate can be from the minimum to the speed of sound; its minimum Reynolds number can be less than 200, the maximum Reynolds number is greater than 107; and the beta value can be selected from 0.25 to 0.90.
Good long-term stability
Because its turbulent shear force is significantly reduced, the direct friction between the medium and the throttle is greatly reduced. Its β value remains unchanged for a long time. The entire instrument has no moving parts, so it can maintain stability for a long time.
Eight, can measure high temperature and high pressure medium
As with orifices and other throttling devices, the working temperature and pressure depend on the materials and grades of the pipes and flanges. The working temperature can reach 850 ° C and the working pressure can reach 42MPa.
Nine, measurable medium of complex working conditions
（如LNG、液氮、液氧、液氩、液氢、液氯、液化乙烯、液化石油气等等）、气液两相介质（如湿气）、浆料、多相水流、震动水流、电磁干扰介质和双向流（因为 平衡流量计左右完全对称 ）。 Due to its special structural design, it has special properties, it can perform gas-liquid two-phase, various mixed gases (such as gas, biogas, coal gas, etc.), and various low-temperature gases (such as LNG, liquid nitrogen, liquid oxygen) , Liquid argon, liquid hydrogen, liquid chlorine, liquefied ethylene, liquefied petroleum gas, etc.), gas-liquid two-phase media (such as moisture), slurry, multiphase water flow, vibrating water flow, electromagnetic interference media, and two-way flow (because The balanced flow meter is completely symmetrical from left to right ).
100 means DN100
Double flange type
0 ~ 0.6MPA
0 ~ 1.0MPA
0 ~ 1.6MPA
0 ~ 2.5MPA
0 ~ 4.0MPA
0 ~ 6.4MPA
0 ~ 10MPA
0 ~ 16MPA
0 ~ 40MPA
304 stainless steel
4 ~ 20MA