Balancing flowmeter is a revolutionary differential pressure flowmeter whose working principle is the same as that of other differential pressure flowmeters. It is based on the principle of energy conversion in sealed pipelines: the flow and difference in the pipeline in the case of an ideal fluid. The square root of the pressure is proportional; using the measured differential pressure value, the flow in the pipe can be calculated from the Bernoulli equation. The balanced flow sensor is a multi-disc disk throttling rectifier mounted on the cross-section of the pipe. The size and distribution of each hole is customized based on special formulas and test data, called function holes. When the fluid passes through the function hole of the disk, the fluid will be balanced and rectified, and the eddy current will be minimized to form an approximately ideal fluid. By taking the pressure device, a stable differential pressure signal can be obtained, and the volume flow can be calculated according to the Bernoulli equation. Mass Flow.
Balancing flowmeter features: 1, the measurement accuracy is 5 to 10 times the standard orifice. 2. The flow noise is 1/15 of the standard orifice plate. 3. The permanent pressure loss is 1/3 of the standard orifice plate. 4. The pressure recovery is 2 times faster than the standard orifice plate. 5, the smallest straight section can be less than 0.5D.
First, high linearity and good repeatability. The balanced flow sensor has the characteristics of symmetrical porous structure, can balance the flow field, reduce eddy current, vibration and signal noise, greatly improve the stability of the flow field, improve the linearity of the orifice plate by 5 to 10 times, and increase the repeatability by 54. %, which is 0.15%, from the perspective of its comprehensive performance, balance flowmeter belongs to the ranks of high-grade flowmeters. When the ratio is 5:1, the linearity can reach ±0.3%; when the ratio is 7:1, the linearity can reach ±0.5%; when the ratio is 10:1, the linearity can reach ±1.0%.
Second, the straight pipe segment requirements are low. Balanced flow sensor due to the stability of the flow field, and the pressure recovery is two times faster than the orifice plate, much shorter The requirement for the straight pipe segment is generally 1D before the 3D, the minimum can be less than 0.5D, thus eliminating a large number of straight pipe segments In particular, the pipes of special expensive materials.
Third, reduce permanent pressure loss. The symmetrical symmetrical design reduces the formation of turbulent shear forces and eddy currents and reduces the loss of kinetic energy. In the same measurement conditions, the permanent pressure loss is reduced by 2.5 times compared to the orifice plate, resulting in considerable savings. The large operating energy cost is an energy-saving instrument that is worth promoting.
Fourth, dirt is not easy to block. The symmetrical symmetrical design reduces the formation of turbulent shear forces and eddy currents, which greatly reduces the formation of stagnant dead zones, ensures that the dirty media passes through multiple holes, and reduces the chance of fluid holes being blocked.
Fifth, can replace the orifice plate directly. It has the same use method and shape as the orifice plate, so it can be replaced directly without any change of piping and related instrument changes. It is very suitable for changing the orifice plate into a balance flowmeter in the whole-house energy metering transformation.
Sixth, the flow measurement range is wide. According to the test results, we learned that: balance the performance of the flow meter, so that its 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; β value can be selected from 0.25 to 0.90.
Seventh, balance flowmeter long-term stability is good. As the turbulent shear force is significantly reduced, the direct friction between the medium and the throttling element is greatly reduced, the β value remains unchanged for a long time, and the entire instrument has no moving parts, so it can maintain stability over a long period of time.
Eight, can measure high temperature and high pressure medium. Like throttling devices such as orifice plates, the operating temperature pressure depends on the material and grade of the pipe and flange, the working temperature can reach 850°C, and the working pressure can reach 42MPa.
Nine, can measure complex working conditions media. Due to its special structural design, it has special properties. It can carry out gas-liquid two-phase, various mixed gases (such as gas, methane, gas, etc.), various low-temperature gases (such as LNG, liquid nitrogen, liquid argon, etc.) , liquid hydrogen, liquefied ethylene, liquefied petroleum gas, etc.), gas-liquid two-phase media (such as moisture), slurry, multiphase flow, vibration flow, electromagnetic interference media, and bidirectional flow (since the balance flowmeter is completely symmetrical) .
Core Drilling Machine
Diamond core drill is a new tool used for drilling holes on reinforced concrete, rocks, ceramics, glass and fire-proof materials
It features in high-efficiency, smooth hole-wall and accurate drilling.
This machine is widely used in building construction, airport runway construction,water, electricity, heat, and gas installation engineering as well as railways and bridges construction.
Wide transport wheels: good rolling quality, as well as being comfortable and light
bore depth measuring scale and depth stop:perfect for blind hole drilling
Extremely slim motor design: for working close to the wall
