The Basic Working Principle Of Metering Pump

It is well known that the metering pump is mainly composed of three parts: power drive, fluid transportation and regulation control. Driving device via mechanical link system drives the fluid conveying the diaphragm (piston) to realize reciprocating motion: the diaphragm (piston) Yu Chongcheng first half weeks will be conveying fluid intake and a half weeks after the fluid discharge pump head; Therefore, the frequency of reciprocating motion of the stroke or the stroke length of each reciprocating motion can reach the purpose of regulating the fluid throughput. Precision machining precision ensures the precision measurement of the delivery medium. Because of the difference in power and fluid transportation, the self-priming pump can be divided into two types: plunger type and diaphragm type.

Plunger valve metering pump.

There are mainly two kinds of valve pump and valve pump. The plunger type w-type single-stage vortex pump is widely used in petrochemical industry due to its simple structure and high temperature and high pressure. For high viscosity medium under high stress conditions common deficiency of vortex pump, a kind of valveless rotary piston pump is valued by more and more widely applied in syrup, chocolate, and measurement of high viscosity medium oil additives added. Due to the lack of complete isolation between the metering medium and the lubricant in the pump, the plunger type metering pump is subject to a lot of restrictions in the application of high pollution prevention.

Diaphragm type metering pump.

As the name implies, the diaphragm type multistage pump plant replaces the piston with the special design and processing flexible diaphragm, realizes the reciprocating motion under the action of the driving mechanism, and completes the inhalation and discharge process. Due to the isolation of diaphragm, the isolation between the measured fluid and the driving lubrication mechanism is realized. High-tech structure design and selection of new material has been greatly improve the service life of the diaphragm, coupled with excellent corrosion resistance properties of composite materials, the diaphragm type sewage pump factory, at present has become the main type pump in fluid metering applications. In the members of the family of diaphragm metering pump, hydraulic drive type diaphragm pump with hydraulic oil evenly drive diaphragm, overcome the diaphragm pump with mechanical direct drive way force excessive concentration of faults, improve the working life of the diaphragm and the maximum working pressure. In order to overcome the malfunction of the diaphragm type metering pump caused by the rupture of diaphragm, some metering pumps are equipped with diaphragm damage sensors to realize automatic chain protection when the diaphragm is broken. The measurement of double diaphragm structure pump head has further improved its safety and is suitable for special sensitive applications. As a kind of diaphragm metering pump, magnetic drive pump with electromagnet driving force ripple, dispense with motor and variable speed institutions, makes system small and compact, is an important branch of small range of low voltage metering pump. Now, precision screw pump factory, technology has been very mature, its fluid metering delivery capacity up to 0-100000 l/h, working pressure up to 4000 bar, scope of work covers all the requirements in the field of industrial production metering pump every measure fluid Shanghai screw pump factory decided to the capacity of its measurement. Under certain effective area of diaphragm, the output of the pump is proportional to the volume flow of the fluid and the stroke frequency and stroke length L F: V ∝ A * F * L in measuring medium and working pressure to determine cases, by adjusting the stroke length and stroke frequency F L can achieve the double dimension of metering pump output regulation while stroke length and frequency can be as A moderator variable, but in the engineering application will stroke length as coarse adjustment variables, stroke frequency for fine tuning variables: adjusting the stroke length to A certain value, filter press pumps then by changing the frequency to achieve fine adjustment, increase the flexibility of adjustment. In relatively simple applications, the stroke length can be set manually, and the stroke frequency can be used as the adjusting variable to simplify the system configuration.