结构简单, 玻璃管转子流量计.使用方便,缺点是耐压力低,有玻璃管易碎的较大风险;适用于小管径和低流速;压力损失较低。 The glass tube rotor flowmeter has a simple structure and a glass tube rotor flowmeter. It is easy to use and has the disadvantage of low pressure resistance and a greater risk of fragility of the glass tube; suitable for small diameters and low flow rates; low pressure loss. Also known as fixed displacement flowmeter, referred to as PD flowmeter, the flow meter is the highest accuracy type. The mechanical measuring element is used to continuously divide the fluid into a single known volume part from time to time, and the total volume of the fluid is measured according to the number of times the measurement chamber is repeatedly filled and discharged with the volume of local fluid. It can be divided into oval gear flow meters and scrapers. Flowmeters, dual-rotor flowmeters, rotary piston flowmeters, reciprocating piston flowmeters, disc flowmeters, liquid-sealed tumbler flowmeters, wet gas meters and membrane gas meters. Glass tube rotor flowmeters are classified according to their measuring elements. They are often used for total measurement of expensive media (oil, natural gas, etc.). Glass tube rotor flowmeters are ranked as the three most used flowmeters with differential pressure flowmeters and float flowmeters.
工业发达国家近年PD流量计（不包括家用煤气表和家用水表）销售金额占流量仪表的13%~23%;国约占20%.其中椭圆齿轮式和腰轮式分别约占70%和20%,速度式流量计中的主要种类, 玻璃管转子流量计.采用多叶片的转子（涡轮）感受流体平均流速,从而且推导出流量或总量的仪表。 Glass tube rotor flowmeters. Industrial developed countries in recent years, PD flowmeters (excluding domestic gas meters and domestic water meters) sales accounted for 13% to 23% of flow meters; countries accounted for about 20%. Of which elliptical gear type and waist wheel type were about Occupying 70% and 20%, the main type of speed type flowmeter, glass tube rotor flowmeter. A multi-blade rotor (turbine) is an instrument that senses the average flow velocity of a fluid and derives the flow rate or total amount. Can also be made monolithic. Generally, it consists of two parts: a sensor and a display. As one of the ten types of flowmeters, turbine flowmeters and volumetric flowmeters, Coriolis mass flowmeters are called three types of flowmeters with the best repeatability and accuracy. Products. Its products have developed into a multi-variety, multi-series mass production scale. High accuracy, among all flowmeters, it is the most accurate flowmeter; large-caliber meters are mostly used in water supply and drainage projects; small- and medium-caliber meters are often used in high-demand or difficult-to-measure applications, and glass tube rotor flowmeters have a wide range of applications. Air outlet cooling water control, paper industry measures pulp and black liquor, strong corrosive liquid in chemical industry, non-ferrous metallurgy industry pulp; small and small calibers are often used in places with hygienic requirements such as the pharmaceutical industry, food industry, and biochemistry. Alternately separate the two sides of the generator to release two series of regularly vortex instruments. The glass tube rotor flowmeter is a non-streamline vortex generator placed in the fluid.
按频率检出方式可分为:应力式、应变式、电容式、热敏式、振动体式、光电式及超声式等。 The glass tube rotor flowmeter can be divided into stress type, strain type, capacitive type, thermal type, vibrating body type, photoelectric type and ultrasonic type according to the frequency detection method. But its rapid development, glass tube rotor flowmeter is the youngest type of flowmeter. It has become a universal type of flowmeter. Ultrasonic flowmeter is an instrument that measures the flow by detecting the effect of fluid flow on the ultrasonic beam (or ultrasonic pulse). The main measuring element of the glass rotor flowmeter is a vertically mounted conical glass tube and a float that can move up and down inside. The cone tube is at the end, and when the fluid passes through the cone glass tube from bottom to top, a pressure difference occurs between the upper and lower parts of the float, and the float rises under the effect of this differential pressure. When the force that causes the float to rise is equal to the combined forces of gravity, float, and viscous force, the float is in a balanced position. Therefore, there is a certain proportional relationship between the flow rate of the fluid flowing through the glass rotor flowmeter and the height of the float, that is, the flow meter area of the glass rotor flowmeter. The position height of the float can be used as a flow measurement. Corrosion-resistant series of glass rotors are mainly composed of conical glass tubes, floats, upper and lower bases and support members. Common glass rotor flowmeters are mainly used in chemical, petroleum, light industry, medicine, fertilizer, chemical fiber, and food. , Dyes, environmental protection and scientific research and other departments, used to measure the flow of single-phase non-pulsating (liquid or gas) fluid. Corrosion-resistant glass rotor flowmeters have strong corrosion resistance, mainly used for the detection of corrosive liquids and gaseous medium flows, such as strong acids (except hydrofluoric acid), strong alkalis, oxidants, strong oxidizing acids, organic solvents and The flow detection of other corrosive gas or liquid media is suitable for chemical, pharmaceutical, papermaking, sewage treatment and other industries.