2025-02-27 智能仪表资讯 0
流量传感器与差压式流量传感器一样，都遵循伯努利方程。它通过管道的平均流速及管道的有效截面积乘积来确定流量。一般管道中的流速分布是不均匀的。如果是充分发展的流体，其速度分布为指数规律。为了准确计量，将整个圆截面分成四个单元，每个单元面积相等，两个半圆和两个半环。阿牛巴流量计检测杆由一根中空金属管组成，布置在垂直于流向工艺管道中，迎流面钻两对总压孔，分别位于各单元面积，它们反映了各单元面积的流速大小。
由于各总压孔相通，传至检测杆中的各点总压值平均后，由总压引出管经高压接头送到变送器正压室。当笛型匀速管正确安装在有足够长度直管段的工艺管道上时，无旋涡存在于流量截面上，全截面的静压可认为是常数。在检测杆背面中间设有检测孔，为整个截面的静圧提供测量。在低壓引出干线由低壓接頭引至变送器負壓室，正、負壓室测得之間差壓平方與流量截面的平均流速成正比，从而获得差壓與流量成正比关系。
1.法兰连接笛型匀速管传感器结构
2.螺纹连接笛型匀速.pipe transmission sensor structure
1.测量 管
2.支撑 管
3.支撑 法兰
4.测量 管固定 法兰
5.连接 座
6 引 压 管
7.(正 压)毛细 引 压 管
8.(低 压)毛细 引 压 管
1.测量 管
2 支撑 管
3 连接 螺 母
4 测量 管固定 螺 纹 连 接 件
5 连接 座
6 引 压 Pipe Transmission Sensor Structure
7.( 正 确 )毛细 引 压 Pipe Transmission Sensor Structure
8.( 误 差 )毛细 引 Pressurized Pipeline Flow Meter, The pressure loss of the conical flow meter is only 2 to 15% of the differential pressure, while the general orifice plate loses 40 to 80%. As the pipe diameter increases, the pressure loss of Arnuoba can be ignored, greatly saving energy costs.
Measurement accuracy high and stability good Accuracy up to ±1.5%, stability up to ±0.2%, and long-term stable measurement range wide Up to a ratio of 10:1 Suitable for various media fluid measurement Compatible with liquid, gas and steam flow measurements Beneficial for pipeline layout Conical flow meters not only suitable for circular pipelines but also rectangular ones Smaller length requirements than orifice plates in straight sections Flexible design reduces costs Easier installation and maintenance Lightweight construction allows easy installation without heavy equipment Can be installed on pipes with continuous flow without shutting down Easy disassembly during maintenance Operation Parameters Model Explanation HLVA Conical Flow Meter Type Code Classification DN100-DN3000 DN100-DN3000 Media Code (Optional) Liquid Gas Steam Compensation Form N No compensation P Pressure compensation output T Temperature compensation output Differential Range (Optional) Low Differential High Differential Field Display Option W Smart shut-off device X Intelligent shut-off device Installation Requirements Please provide pipeline dimensions, wall thickness, material requirements; Provide fluid conditions such as name, minimum operating temperature, minimum operating working pressure, minimum constant use flow rate (if gas), density and viscosity; Specify corrosive type when selecting corrosion-resistant types Faults Cause Solutions Faults Causes Solutions No differential signal output High-pressure valve not opened Open high-pressure valve Balance valve not tightened Tighten balance valve Small differential signal Large secondary scale selected Adjust upper limit value Large secondary scale selected Clear clogged passages Adjust upper limit value Backpressure hole clogged Clean conical tube
