In the fermentation production of citric acid, monosodium glutamate and other products in Tianjin, most of them use glass rotor flow meters to measure the ventilation flow of the fermentation tank. When using the LY-LZB series glass rotor flowmeter provided by our factory (Lianyi Automatic Control Equipment Co., Ltd.), it is found that when the wind pressure suddenly increases or the valve is accidentally opened during operation, the rotor in the rotor flowmeter will surge. The buffer rubber pad on the upper part of the flow meter is stuck, blocking the air outlet on the upper part of the flow meter. Even if the control valve is closed before the flow meter is closed, the rotor does not fall off, which makes the glass rotor flow meter unusable.
After analysis by our factory, this is mainly caused by a buffer rubber washer inside the glass rotor flowmeter. When the rotor floats to the top and is attached to the rubber washer, the air outlet of the upper part of the flowmeter is blocked under the action of viscous gas. The pressure in the glass tube of the flowmeter remains unchanged and drags the rotor, and the rotor is always on the upper part of the flowmeter, which causes this phenomenon to occur, and the flowmeter fails.
拆开解体，取出转子导杆，在导杆上部固定螺纹以下开始用￠3mm不锈钢丝绕制一个长度约为10公分左右的限位弹簧，并将此弹簧固定在转子导杆上，使该弹簧下部分位于玻璃转子流量计上限刻度以上即可，然后按顺序组装好流量计，就可以正常使用，不会出现上述故障了，当转子冲到上限刻度以上时，由于上部限位弹簧的缓冲减速作用，转子就不会冲到顶部，就不会被粘住，这样流量计内部气流就会保持流畅。 Then, in response to this problem, after testing and verification, our factory began to make small improvements to the glass rotor flowmeter . The glass rotor flowmeter was disassembled and disassembled, and the rotor guide rod was taken out. A 3mm stainless steel wire is wound around a limit spring with a length of about 10 cm, and the spring is fixed on the rotor guide, so that the lower part of the spring is above the upper limit of the glass rotor flowmeter, and then the flow is assembled in order. Meter, it can be used normally without the above-mentioned faults. When the rotor rushes above the upper limit scale, the rotor will not rush to the top and will not be stuck due to the buffer deceleration effect of the upper limit spring. The internal airflow will be kept smooth.
在使用安装前，应先检查其技术参数如：测量范围，精确度等级，额定工作压力，温度等参数是否符合使用要求。 Before using the glass rotor flowmeter , check its technical parameters such as: measurement range, accuracy level, rated working pressure, temperature and other parameters that meet the requirements for use. Before installation, the top lining for transportation protection should be removed. And check the cone tube for damage, whether the float can move up and down freely, and it can be installed only after it is normal. The newly installed pipeline should be flushed before the glass rotor flowmeter is installed. The minimum graduation value of the rotor flow meter should be below and installed vertically on the pipeline without vibration. The angle between the center line of the rotor flow meter and the plumb line should not exceed 5 degrees. Large-caliber flowmeters are heavy. To avoid pipe bending, measures such as reinforcement and support can be taken if necessary. It is also necessary to prevent the rotor flowmeter from being subjected to excessive tension, pressure, and torque during installation. So as not to generate excessive external force and damage the tapered tube. According to different working conditions in use, if necessary, a filter should be installed upstream of the rotor flowmeter to prevent contamination by impurities and block the rotor flowmeter. If the fluid is unstable and has a pulsating flow, a buffer can be installed to ensure the good measurement of the rotor flow meter to eliminate the pulsating flow. When the rotor flowmeter is in use, first slowly open the control valve on the upstream pipe of the flowmeter, and then use the regulating valve to adjust the flow rate, so as to avoid the sudden rise of the float to cause damage to the cone tube. In order to ensure the measurement accuracy of the rotor flow meter in use, it is recommended that the common flow rate of the measured fluid be selected to be more than 60% of the upper limit value of the flow rate of the rotor flow meter.
主要用于化工、石油、轻工、医药、化肥、化纤、食品、染料、环保及科学研究等各个部门中，用来测量单相非脉动（液体或气体）流体的流量。 Glass rotor flowmeters are mainly used in chemical, petroleum, light industry, medicine, fertilizer, chemical fiber, food, dye, environmental protection and scientific research departments to measure the flow rate of single-phase non-pulsating (liquid or gas) fluids. Corrosion-resistant flowmeters are mainly used to detect the flow of corrosive liquids and gaseous media, such as strong acids (except hydrofluoric acid), strong bases, oxidants, strong oxidizing acids, organic solvents and other corrosive gas or liquid media. Flow detection. The LZB type measuring tapered tube uses a smooth tapered glass tube, and the LZJ type uses a ribbed tapered glass tube. Features: small pressure loss; reliable performance, convenient and intuitive reading; simple structure, easy installation and use;