Kashgar vortex flowmeter shell supervision and inspection, general agent for steam meters

Description :

LUB-2340 Vortex Flow Meter Shell InspectionIt uses the Karman vortex street principle for flow measurement. When a cylindrical object is vertically inserted into the measuring tube, the fluid naturally alternates between regular vortices on both sides of the object, which is called a Karman vortex street At d/D=0.281, the released vortex is stable. D is the diameter of the pipeline. ）The release frequency of the Karman vortex street is related to the flow velocity of the fluid and the width of the column. The steam gauge uses CNC equipment to process the sensor body and vortex generator, ensuring machining accuracy and making the components (especially the vortex generator) highly versatile, thus truly ensuring that the repeatability and accuracy of the sensor will not be affected by component replacement; The ability to generate strong and stable vortex signals has also attracted attention in the development of vortex flowmeters in China. In the early 1970s, Chongqing Industrial Automation Instrument Research Institute and Beijing Public Utilities Research Institute invested in the research and development of vortex flowmeters. In 1967, Japanese scholars Kiichi Tsuchiya and Hiroshi Yamazaki studied the application of vortex street principle to measure the flow rate of a circular tube. They placed a cylindrical body vertically in the tube and set a metal flag that could rotate around a fixed axis downstream of the cylinder. When the fluid flows, the effect of the vortex street causes the small flag to swing left and right, in order to detect the vortex signal and conduct flow measurement experiments,Kashgar vortex flowmeter shell supervision and inspection, general agent for steam metersWhen measuring volumetric flow rate with a vortex flowmeter, no compensation is required. The signal output by the vortex flowmeter is actually linearly related to the flow rate, that is, directly proportional to the volumetric flow rate. The purpose of pressure and temperature compensation is to obtain the density of the fluid, which is multiplied by the volumetric flow rate to obtain the mass flow rate. If measuring the volumetric flow rate of a gas, there is no need for compensation. The advantages of intelligent vortex flowmeter are excellent anti vibration performance, no zero drift, and high reliability.

　　Qingdao Hesheng Zhiyuan Automation System Co., LtdMonitoring and Inspection of Vortex Flow Meter ShellPrecautions for selection:

　　1. The diameter of anti vibration steam measurement should be selected according to the flow rate, and the medium flow rate must be within the flow range, otherwise it cannot work. The flow rate is 30% -80%;

　　2. If the actual pipeline diameter is larger or smaller than the selected instrument diameter, shrink tubing or expansion tubing should be used to reduce the diameter to ensure the normal use of the instrument;

　　3. The anti vibration vortex flowmeter selects the corresponding temperature flowmeter based on the temperature of the measured medium; Choose whether the flowmeter is explosion-proof according to the requirements of the measured medium and environment;

　　4. The vortex flowmeter has certain requirements for the front and rear straight pipe sections, generally 25 times the DN before and 5 times the DN after. Specific requirements can be found in the instruction manual;

　　5. The liquid in the vortex flowmeter of a heat exchange station generally does not have temperature and pressure compensation. Saturated steam should have temperature or pressure compensation, while gas and superheated steam should have both temperature and pressure compensation.

　　6Kashgar vortex flowmeter shell supervision and inspection, general agent for steam metersUsing a DN50 vortex flowmeter to measure the flow rate of combustible gases, if the large flow rate Qmax in the pipeline is 200m3/h, the pressure loss of the sensor is Δ P=1.08 × 10-6 ρ v2 (kPa)=0.605 KPa. The lower limit flow rate of the vortex flowmeter depends on the working density and kinematic viscosity of the medium, and its upper limit flow rate is generally not affected by the pressure and temperature of the medium. Therefore, determining the flow range only requires determining the actual available lower limit flow rate. After calculating the lower limit flow rate, the corresponding diameter can be determined by checking the flow range table. Generally, it is not recommended to invert the sensor in a horizontal pipeline. This installation method is not suitable for measuring general gases and superheated steam. Can be used to measure saturated steam, suitable for measuring high-temperature liquids or situations that require frequent pipeline cleaning

　　Produced by Qingdao Hesheng Zhiyuan Automation System Co., Ltdvortex flow meterMainly used for flow measurement of industrial pipeline media fluids, such as gases, steam, liquids, and other media.Monitoring and Inspection of Vortex Flow Meter ShellThe characteristics are small pressure loss, large range, high accuracy, and almost unaffected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring volumetric flow rate under working conditions. No movable mechanical parts, therefore high reliability and low maintenance. The instrument parameters can remain stable for a long time. The anti pipeline vibration flowmeter adopts a piezoelectric stress sensor, which has high reliability and can operate within the working temperature range of -20 ℃ to+250 ℃. It has both analog standard signals and digital pulse signal outputs, making it easy to use in conjunction with digital systems such as computers. It is a comparative flow measurement instrument.Kashgar vortex flowmeter shell supervision and inspection, general agent for steam metersFor the convenience of use, the battery powered local display vortex flowmeter adopts low-power high-tech technology. It can operate continuously for more than a year using lithium battery power supply, saving the procurement and installation costs of cables and display instruments. It can display instantaneous flow rate, cumulative flow rate, etc. on site. The standard material 304 probe can be applied to most conventional media, including some corrosive media and saturated steam, superheated steam. Non special highly corrosive media do not need to use special materials, as the latter is more expensive and has a longer processing time. If there are more than 15 upstream of the sensor installation point. For tapered pipes, if the upstream straight pipe section is ≥ 15D and the downstream straight pipe section is ≥ 5D, in practical applications, large flow rates are often much lower than the upper limit value of the instrument. With changes in load, small flow rates often fall below the lower limit value of the instrument, and the instrument does not work in its working section. To solve this problem, it is usually necessary to reduce the diameter at the measuring point to increase the flow velocity at the measuring point, and use smaller diameter instruments to facilitate the measurement of the instrument

Kashgar vortex flowmeter shell monitoring, steam metering general agent technical parameters:

　　Anti vibration vortex flowmeter protection level: IP65

　　Electrical interface: M20 × 1.5

　　Explosion proof type: ordinary non explosion proof type, explosion-proof type (optional), Kashgar vortex flowmeter shell monitoring, steam metering general agent

　　Environmental temperature: -35 ℃~60 ℃

　　Relative humidity: 5-95%

　　The monitoring signal circuit of the vortex flowmeter shell adopts single-chip technology for data processing, which encapsulates the CPU unit, storage unit, display unit, communication unit, and other functional modules in the amplification circuit. It has RS485 communication function and has very stable zero point and accuracy. If there is more than 15 upstream of the sensor installation point. Gradual expansion pipe, then: upstream straight pipe section ≥ 18D, downstream straight pipe section ≥ 5D

　　Qingdao Hesheng Zhiyuan Automation System Co., Ltd

　　189 Hui Xin 5483 Same number 1481

　　Q：3438-5007-67

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• Monitoring and Inspection of Vortex Flow Meter Shell