How much is the pressure transmitter in a wide range by the pressure range?

Pressure transmitter is the most common industrial practice, a pressure gauge, its widely used in various industrial control environment, involved in water conservancy and hydropower, railway transportation, intelligent buildings, production control, aerospace, military industry, petrochemical, oil, electric power, ships, machine tools, pipe, and many other industries. General pressure transmitter (in a wide range Measuring range 0 r50MPa) , threaded connection installation type pressure transmitter, can accurately measure the pressure of the fluid, and put it into a DC4 - 20 ma output signal. In the test department, input pressure is converted to static capacitance, in the transport department to detect is proportional to the pressure signal amplification operations, sending output DC4 - 2 the current signal of oma. 2, the overall structure and stress analysis of total pressure transmitter in a wide range of mechanical component structure as shown in figure 2. Pressure transmitter with the pressure pipeline through the connecting pipe using NPT1/2 tapered pipe thread sealing connection, normal work be full of connecting pipe flow pipe internal pressure of fluid pressure, fluid pressure by seal diaphragm and internal filling medium to convey in the transmitter, the atmospheric pressure seal diaphragm and two internal filling medium to convey in the transmitter, so the pressure sensor internal pressure on the high side and the connecting pipe work for fluid pressure, the pressure on the low voltage side of the pressure sensor for the atmospheric pressure. So the normal work of the pressure transmitter in a wide range, the prize of the total components connection tube wall and weld is the most weak link in the compression area. If the thin wall design, weld depth is too shallow, will make the tube wall, weld rupture is filled with current body or media leaks. Due to the atmospheric pressure on the low voltage side of 1. 01 x105pa, work is about high side pressure 50 m Pa 11500, pressure is very small, no longer calculate the strength of the low voltage side parts. Under normal circumstances, the pressure transmitter internal filling medium in a wide range and no strong corrosive liquid, temperature changes in smaller scale ( In the range 150 - c 85' C) 。 压力变送器是最常用的压力仪表在工业实践中,广泛应用于各种工业自动控制环境,涉及水利水电、铁路交通、智能建筑、生产自动化、航空、军事、石油化工、油田、电力、船舶、机床、管道和许多其他行业。 一般大, 范围( 测量范围0 - r50MPa) 螺纹连接安装压力变送器,可以精确测量流体压力,将它转换成DC4 - 20 ma输出信号。 检测单元,输入压力转换成一个静电电容器。 在传输单位,检测信号与压力成比例放大和输出的电流信号DC4 - 2 oma传播。 2、总体结构和压力analysisThe机械部分的总体结构大范围的压力变送器是如图2所示。 压力变送器和压力场NPT1/2管道相连的圆锥管螺纹密封。 被测液体充满了连接管在正常操作。 的内部压力管道的工作压力是流体。 流体压力是通过密封隔膜——传播 1和发射机内部的填充介质。 大气压力是通过密封隔膜——传播 2和传输。 在高的压力 压力的压力传感器和内部连接管的流体工作压力,压力低 压力传感器的压力一边是大气压力。 因此,一个大范围压力变送器在正常运行时,连接管墙和焊缝的机械装配中最弱的环节部分的压力。 如果管壁厚度和焊透深度太浅,管壁和焊缝破裂,导致液体的泄漏或填充介质下测试。 由于大气压力偏低是1。 01 x105pa,大约1500 MPa的工作压力偏高,压力很小,强度偏低不再计算。 一般来说,包装中、大范围的测试液体压力变送器不强烈腐蚀性,和温度范围小( 从1 150 C 85” C' ) 。