的主要测量元件为一根小端向下，大端向上垂直安装的锥形塑料管及其在内可以上下移动的浮子。 The main measuring element of the plastic tube float flow meter is a conical plastic tube with a small end facing downward and a large end facing upward, and a float that can move up and down inside. When the fluid flows through the conical plastic tube from bottom to top, a pressure difference is generated between the upper and lower parts of the float, and the float rises under the action of this differential pressure. When the force that causes the float to rise is equal to the combined forces of gravity, buoyancy, and viscous force, the float is in an equilibrium position. Therefore, there is a certain proportional relationship between the flow rate of the fluid flowing through the flowmeter and the rising height of the float, that is, the flow area of the flowmeter. The position height of the float can be used as a flow measurement.
的使用〔1〕仪表使用时，应先缓慢开启上游阀门至全开，然后用流量计下游的调节阀调节流量。 Use of plastic tube float flowmeter  When using the meter, the upstream valve should be slowly opened to full open, and then the flow rate should be adjusted with the regulating valve downstream of the flowmeter. When the meter is out of use, close the upstream valve slowly, and then close the flow regulating valve downstream of the meter.  The indication value of the meter is seen in the middle of the score line, and the indication value is read from the scale of the float according to the height of the float. 〔3〕 When the cone and float are contaminated, they should be cleaned in time.  Regularly check the flowmeter for errors. Once it exceeds the specified error, the float and cone should be replaced or recalibrated to obtain better accuracy.  When the measured fluid is inconsistent with the calibration medium of the flowmeter, the displayed value must be corrected.
代替油、气绝缘。 Optically isolated plastic tube float flowmeter replaces oil and gas insulation. Independent high-voltage transformers use optical fiber digital connections once and twice. Optical isolation replaces complex and expensive oil and gas insulation systems. This is a revolutionary change. The higher the voltage, the higher the cost-effectiveness of the transformer. Digital output replaces analog output, which is convenient for subsequent network connection and intelligent processing. It adopts optical fiber transmission and has stronger ability to resist electromagnetic interference. Network data sharing replaces multi-winding parallel wiring. Single-point measurement data of electronic transformers can be transmitted via Industrial Ethernet, so they are shared, and a large number of parallel cables can be omitted at the power station. The emergence of electronic transformers has been hailed as a revolution in the manufacturing of high-voltage electrical appliances in the early 2000s. Its digital output and networked wiring make the power grid safer, more environmentally friendly, and more conducive to the intelligence of the primary equipment and even the entire transmission and distribution system. Compared with traditional transformers, electronic transformers have the following characteristics: small signal transmission instead of high power output, miniaturization and low power of transformers can reduce the weight of tens of kilograms or even tons to a few kilograms.