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technical article
The main measuring element of the plastic tube float flowmeter is a small end down and a large end up
2012-3-22 15:24:23

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. LZB- () S plastic tube rotor flowmeter cone The main components such as tubes are made of AS, ABS plastic, which has good corrosion resistance. The product also has the characteristics of reasonable structure, small size, light weight, and difficult to break the cone tube. The plastic tube rotor flowmeter can be widely used in chemical industry. , Environmental protection, food and other industrial sectors.

安装前,应把仪表内的泡沫支撑物用工具尖嘴钳轻轻把它取出,然后重新把它安装好,在安装时,要注意橡胶垫圈是否装在接管的槽内,以防漏水。 Before installing the plastic tube float flowmeter , the foam support in the instrument should be gently taken out with tool nose pliers, and then reinstalled. When installing, pay attention to whether the rubber gasket is installed in the groove of the pipe. To prevent water leakage. [2] The interface of the flowmeter can be matched with ABS plastic pipe, or PVC plastic pipe, and connected with special glue, or it can be connected by plastic method, and then connected to the metal flange. [3] The flowmeter must be installed vertically, without obvious tilt, and its installation height should be convenient for reading the float. When reading, the line of sight and the float should be horizontal. [General standard: The optimal flow rate required is 50% -70% of the maximum flow rate of the flow meter. Try not to use the highest number. [4] The upstream and downstream inlets and outlets of the meter should ensure a straight pipe section with 5 times the meter diameter. [5] The pressure of the bedding fluid must be stable. If the fluid is too unstable, it will cause the float to fluctuate and cannot be measured correctly. A buffer or a setter should be set upstream of the flowmeter. [6] The plastic tube rotor flowmeter should be installed vertically, and the angle between the centerline of the flowmeter and the plumb line should not exceed 5 degrees. 1) When using the meter, first slowly open the upstream valve to full open, and then use the regulating valve downstream of the flow meter to adjust the flow. When the meter is out of use, close the upstream valve slowly, and then close the flow regulating valve downstream of the meter. 升起的高度由浮子的标尺处读出示值〔3〕当锥管和浮子粘污时,应及时清洗。 [2] The indication value of the meter is seen in the engraved line, and the indication value is read from the scale of the float according to the height of the plastic float flowmeter . [3] When the cone tube and the float are contaminated, they should be cleaned in time. [4] 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. 5] When the measured fluid is inconsistent with the flowmeter's calibration medium, the displayed value must be corrected. Expressed by

QS = QN

QS = actual flow rate Qn = meter reading indication ρn = medium density at the time of flowmeter calibration ρs = density of the measured medium ρf = density of the float material