Electromagnetic flowmeter legend | Principle and dynamic diagram of commonly used flow equipment in water companies

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1. What is the wiring diagram of the flowmeter? How is the flowmeter wired? The wiring method of the flowmeter may vary depending on the type and brand. Here are two common wiring methods for flow meters for your reference.
1. Wiring method for split type flow meters: As shown in the above figure, the sensor and accumulator of the split type flow meter are installed separately and connected through signal cables. When wiring, it is necessary to connect the output signal of the sensor to the input terminal of the integrator. Generally speaking, the wiring method of a split type flowmeter is relatively simple. Simply connect the corresponding signal line to the integrator.
2. Wiring method of an integral flowmeter: As shown in the diagram, the integral flowmeter integrates the sensor and integrator together without the need for signal cables.
. When wiring, it is necessary to connect the output signal of the sensors dead end finger to the input terminal of the integrator. The wiring method of the integral flowmeter is relatively simple, just connect the corresponding signal line to the accumulator. It should be noted that different types of flow meters have different wiring methods, so it is necessary to carefully read the user manual of the flow meter before wiring to understand the correct wiring method. At the same time, safety should be taken into account during the wiring process to avoid contact with live parts or dangerous operations.

2. The schematic diagram of the electromagnetic flowmeter is shown in the figure. Calculate the liquid flow rate in the tube and its numerical value ..

The schematic diagram of an electromagnetic flowmeter is shown in the figure, which is a non-magneti

c tube with a square cross-section. Each side of the tube is d, and there is a conductive liquid flowing inside. A uniform magnetic field pointing towards the paper is added in the direction perpendicular to the liquid flow, and the magnetic induction intensity is B. The potential difference between points a and b of the liquid is measured as U, and the flow rate Q of the conductive fluid inside the tube is calculated. After stabilization, there are uniform electric and magnetic fields perpendicular to each other in the tube. The flowing conductive liquid is subjected to electric field force and Lorentz force and moves at a constant speed (the resultant force is 0). Therefore, from the staring model qE=qVB, where V is the velocity, E=VB is obtained. If time t is taken, The volume of liquid passing through the cross-section of the pipe during this period is V liquid=V * t * d ^ 2, and the required flow rate is Q=V liquid/t=V * d ^ 2. The electric field strength is E=U/d, so the flow rate Q=(E/Kayou slow) B) * d ^ 2=U * d/B

3. Doppler open channel flowmeter

4. Principle and dynamic diagram of flow equipment commonly used by water companies

The flow equipment commonly used by water companies can be divided into two categories: water meters for trade settlement and flow meters for pipeline networks. The following is an overview of the principles and corresponding dynamic diagrams of these two types of devices.

1. Working principle of trade settlement water meter rotor type water meter: Water enters the case through the water inlet of the water meter, passes through the water filter net, and impacts the impeller to start rotating.

. The water flows out from the upper outlet hole of the impeller

Electromagnetic flowmeter legend | Principle and dynamic diagram of commonly used flow equipment in water companies

2. The schematic diagram of the electromagnetic flowmeter is shown in the figure. Calculate the liquid flow rate in the tube and its numerical value ..

3. Doppler open channel flowmeter

4. Principle and dynamic diagram of flow equipment commonly used by water companies

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