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technical article
Upgraded application case of glass rotor flowmeter Flow detection of corrosive gas or liquid medium
2012-3-5 11:29:04

的主要测量元件为一根垂直安装的下小上大锥形玻璃管和在内可上下移动的浮子。 The main measuring elements of the WT-LZB LZBF LZBD LZS (special, special material) glass rotor flowmeter are a vertically mounted lower and upper conical glass tube and a float that can move up and down inside. When the fluid passes through the conical glass tube from the bottom to the top, a pressure difference occurs between the upper and lower parts of the float, and the float rises under the action of this differential pressure. When this rising force, the buoyancy and viscous lift force of the float are equal to the gravity of the float, the float is in an equilibrium position. Therefore, there is a certain proportional relationship between the flow rate of the fluid flowing through the glass rotor flowmeter and the height of the float, that is, the flow meter area of the glass rotor flowmeter. The position height of the float can be used as a flow measurement.

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 flowmeter is mainly used in chemical, petroleum, light industry, medicine, fertilizer, chemical fiber, food, dyes, environmental protection and scientific research and other departments to measure the single-phase non-pulsating (liquid or gas) fluid flow. Anti-corrosive glass rotor flowmeter is 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 gases or liquids Flow detection of media. 1. Direct monitoring of fluid, measuring fluid can be directly monitored through glass tube, which is also very effective for the management of process fluid quality. 2. Superior economics, the on-site indicator type flowmeter has intuitive readings, is inexpensive, and easy to use. 3. Convenient installation and maintenance, no tedious adjustment is required for installation on the piping; piping design is very easy, and no ordinary maintenance is required. 4. Pure mechanical operation, the flow is displayed by the position and scale of the float, no power supply or gas source is required.

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. 无法使用。 When using the LY-LZB series glass rotor flowmeter provided by our factory (Jinhu Dongxiang Instrument Co., Ltd.), it was found that when the wind pressure suddenly increases or the valve is accidentally opened during operation, the rotor in the rotor flowmeter will impact. The buffer rubber pads rising to the upper part of the flowmeter stick to the upper part, blocking the upper air outlet of the flowmeter. Even if the control valve is closed before the flowmeter is closed, the rotor does not fall off, making the glass rotor flowmeter 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. 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.