The classification of the dosing pump is generally classified according to the structure of the pump head and the form of transmission. The working principle and compositional structure of the dosing pump are also very different.
Dosing pump can be divided into plunger type dosing pump and diaphragm type dosing pump according to the pump head part. The plunger type dosing pump is a plunger for linear reciprocating diaphragm dosing pump directly through the valve opening and closing The purpose of sucking and discharging liquid, while the diaphragm dosing pump is reciprocating by means of a plunger in the cylinder body, so that the oil in the chamber generates a pulse force, which pushes the diaphragm to move back and forth, and achieves the purpose of sucking and discharging the liquid under the action of the opening and closing of the valve. Separate the plunger from the liquid to be transported to prevent the liquid from leaking out to cause pollution and loss. If an alarm is fitted, the diaphragm can be stopped and alarmed when the diaphragm ruptures, effectively avoiding contamination of the process piping by the oil, and after replacing the diaphragm It can resume normal operation. In addition, the diaphragm pump is also equipped with a three-valve device (automatic oil valve, safety valve, and air release valve), which can be used to supplement the working oil of the hydraulic chamber in time, and at the same time can avoid overfilling and improve the service life of the diaphragm. , It can also ensure the safety of the dosing pump system.
The dosing pump is divided according to the transmission mode, and can be divided into cam type and N-axis type: where the micro-computer seat (JW) is a splicing plate cam type structure. The motor drives the eccentric cam through the worm and worm gear to rotate the slider (crosshead). Make the plunger reciprocate linearly.
Dosing pump flow regulation is achieved by changing the plunger stroke length or pump speed. The plunger stroke can be adjusted steplessly within a range of 0 to 100%, and can be performed both during operation and when stopped. With the electronic control and other devices, it can realize the original distance operation or automatic control. Equipped with AC or speed control motor, it can realize double adjustment or reduce the pump speed to meet the needs of process flow.
