In modern industrial production and research, diaphragm metering pump is a pump that is widely used in quantitatively transporting liquids. The flow adjustment of the metering pump adopts manual adjustment of the screw of the metering pump according to the traditional working method, thereby changing the effective stroke of the mechanical diaphragm metering pump, so as to achieve the purpose of quantitative measurement and detection of the output liquid.
Ⅰ. What is a metering pump?
The metering pump is a special positive displacement pump that can transport a variety of liquid media, especially corrosive liquids. With the advancement of science and technology and the development of modern industrial technology, the requirements for pumps under various media and working conditions are getting higher and higher.
Therefore, for mechanical products such as pumps, how to adjust the flow rate is very important, and the metering pump is no exception. So how does the metering pump adjust the flow rate during the transportation process.
Ⅱ. What are the adjustment methods of the metering pump?
1. Set the bypass loop in the output pipeline system, then adjust the bypass valve, and then control the return flow, so as to achieve the purpose of adjusting the output flow of the system. However, this method is not perfect, and energy loss may increase during this operation, so this is also a major defect of this flow regulation method.
2. Adjust the flow rate by changing the speed of the metering pump. This method needs to be carried out when the average flow rate of the pump is proportional to the speed. The reciprocating pump has this feature. Therefore, the flow rate can be adjusted in this way.
In addition, the method of adjusting the flow rate by changing the speed also needs to adjust the speed of the equipment or the motor. However, when the flow rate is small, the number of strokes is too small, resulting in excessive discharge time, which is not allowed for certain chemical reactions. Therefore, the metering pump manufacturer suggests that you still need to pay more attention.
3. The metering pump adjusts the flow rate by adjusting the stroke length of the pump. One of the advantages of the metering pump is that the metering accuracy is high, and even in the case of a small flow rate, it can still meet the linearity requirements, which is one of the most effective methods.
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