What is the principle of the pressure tank at the pump outlet?
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As shown in the picture, it is a liquid pressure testing system. A pressure tank is installed at the pump outlet. What does it do? The outlet pressure of the pump is controlled by the pressure gauge and the motor is controlled by frequency conversion according to the pressure of the pressure test piece to reach the outlet pressure value. However, I don't understand that there is a small pressure tank of tens of liters on the outlet pipeline. What is the purpose of this? Voltage stabilization? How to stabilize?
The pressure tank at the outlet of the pump is a device used to stabilize and adjust the pressure of the liquid pressure test system. It regulates the pressure of the system by storing a certain amount of liquid and controlling the opening and closing of the inlet and outlet valves. In a liquid pressure testing system, the pump usually generates a higher pressure, and the pressure tank can smoothly provide a stable liquid with a certain pressure. When the pressure of the pump exceeds the value set by the pressure tank, the excess pressure will be discharged through the valve ； On the contrary, when the pressure of the pump drops, the pressure in the pressure tank can be supplemented into the system to ensure that the system always maintains a stable working pressure, thereby protecting the safety of the pressure test piece. Therefore, the main function of the pressure tank is to stabilize the pressure of the pressure test system and prevent pressure fluctuations from causing damage to the pressure test parts or affecting the test results. By reasonably setting the capacity and design pressure of the pressure tank, the pressure stabilizing function of the system can be effectively achieved. .
Is this pump a plunger pump? If it is a plunger pump, the outlet pressure will pulsate during operation. Install a buffer tank at the outlet, which usually contains gas. This pulsation can be eliminated through the compressibility of the gas. There is also a possibility that sometimes the pump will stop after the pump outlet pressure reaches the target pressure. Since liquids are incompressible, pressure will drop quickly. After a pressure stabilizing tank is installed at the outlet, since the gas in the tank is compressible, the pressure can be maintained for a longer period of time.
Used for voltage stabilization to reduce the number of starts and stops of the pump.
The eyewash system can be installed with this small tank. After installation, the pump output pressure is stable and the water column height of the eyewash can exactly meet the requirements. The scientific name of this small jar: Diaphragm pressure tank. There is a diaphragm inside for voltage stabilization. There is usually a pressure gauge on the top, and there is an air path next to the pressure gauge for inflation.
It is used for voltage stabilization to reduce pressure fluctuations during the test process.
Pressure test pumps generally use plunger pumps. The medium outlet pressure of the plunger pump has pulsation (fluctuation). In order to slow down the impact of this pulsation on the pipeline and pressure test parts, a buffer tank is generally installed at the outlet.
Similar to an accumulator, it is mainly used to stabilize the pressure and prevent the pump pressure from fluctuating too much.