作为直观活动指示或丈量精确度要求不高的现场指示仪表，占平衡流量计应用的90％以上，被广泛地用在电力、石化、化工、冶金、医药等流程产业和污水处理等公用事业。 Balanced flowmeters are intuitive field indicators or field indicators with low measurement accuracy requirements, accounting for more than 90% of the application of balanced flowmeters. They are widely used in power industry, petrochemical, chemical, metallurgical, pharmaceutical and other process industries and sewage treatment. Utilities. Some application sites only need to monitor the flow rate not exceeding or not lower than a certain value. For example, the increase of the cable inert protective gas flow indicates that a new leak point has occurred. Circulating cooling and culture tank and other places such as water or air flow reduction and cut-off alarm can choose glass tube balance flowmeter with upper or lower flow alarm.
The main measurement object of a balanced flow meter is a single-phase liquid or gas. Particles in a liquid or droplets in a gas are usually not applicable. Due to the balance, the adherence of particles or micro-bubbles in the liquid flow will affect the measurement value. For example, after the micro-flow meter is used for a period of time, the adhesion layer that cannot be seen by the naked eye will also change the flow rate indication by a few percent.
，如温度、压力不能胜任则选用就地指示平衡流量计。 If only the on-site instructions are required, first consider the inexpensive glass tube balance flowmeter . If the temperature and pressure are not sufficient, use the on-site instruction balance flowmeter. Glass tube balanced flowmeters should be selected with a transparent protective cover. Once the glass cone tube breaks, it can stop the fluid from splashing forward for emergency treatment. When used for gas, a guide rod or a ribbed instrument should be used to avoid accidental balancing and crushing of the cone tube. If it is necessary to transmit the signal remotely for total accumulation or flow control, a balanced flowmeter with electrical signal output is generally selected. If the ambient atmosphere has explosion-proof requirements and there is an on-site gas source for control instruments, priority is given to remote gas transmission metal balance flow meters. If electric remote transmission instruments are selected, they must be explosion-proof.
When measuring opaque liquids, it is more common to choose a balanced flowmeter, but a glass tube balanced flowmeter with a ribbed tapered tube can also be selected, and the position of the balance can be determined by balancing the maximum diameter of the contact with the ribs.
Balance flow meter is a volume flow meter which is balanced to measure the volume flow in vertical conical tube as the flow rate changes and change the flow area between them. It is also called rotor flow meter. It is often called variable area flowmeter or area flowmeter in the United States and Japan.
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. 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. Through the pressure taking device, a stable differential pressure signal can be obtained. The volume flow rate is calculated according to Bernoulli's equation, Mass Flow