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Hydraulic diaphragm metering pump, mechanical plunger metering pump related models introduced
Edit:Lianyungang Mi Lu Luo Pump Industry Co., Ltd   UpDate:2016-07-19

Hydraulic diaphragm metering pump, mechanical plunger metering pump related models introduced

First, the hydraulic diaphragm metering pump

Drive mechanism

(1) by the motor power transmission to the worm, worm wheel to achieve slow rotation, to promote the crankshaft link mechanism for reciprocating motion, driving the plunger to produce hydraulic.

(2) The stroke adjustment mechanism is composed of crankshaft, eccentric wheel, adjusting nut, adjusting screw, adjusting hand wheel (handle), dial (pointer) and scale, by changing the eccentricity to reach the relative stroke of the plunger.

2. Hydraulic system

(1) Hydraulic hydraulic diaphragm type metering pump hydraulic system, its structure consists of plunger, cylinder, cylinder head, inlet and outlet valve, hydraulic diaphragm and three valve composition (ie: bleed overload valve, limit valve, compensation valve). In the work by the diaphragm separated from the hydraulic oil and media, so the hydraulic diaphragm type metering pump with or without the advantages of leakage.

(2) hydraulic diaphragm type metering pump hydraulic end of the plunger by the drive side of the crank link mechanism to carry out the reciprocating motion. The plunger in the hydraulic chamber for reciprocating motion, to promote the hydraulic oil pressure changes, so that the hydraulic diaphragm deflection displacement to transport the medium, the hydraulic chamber of the hydraulic oil is relatively stable, by the three valve function to maintain.

(3) the overload valve automatically discharge the hydraulic oil into the hydraulic chamber of the gas, to ensure smooth work, to avoid excessive hydraulic oil or discharge pipeline blocked overpressure automatically open the load valve, to protect the purpose.

(4) limit compensation device is to use hydraulic diaphragm to promote the opening of the limit valve, according to the vacuum chamber at any time to add fuel to ensure that the hydraulic chamber filled with hydraulic oil.

Metering pumps are widely used in petrochemical, chemical, power, water treatment, pharmaceutical and other industrial processes for the quantitative delivery of various chemical additives.

In 1936, invented the world's first motor-driven metering pump;

In 1939, Larry Wilson invented Wilson chemical feed equipment - the world's first hydraulic drive diaphragm metering pump;

1963, invented the world's first electromagnetic drive metering pump-LMI;

In 1965, invented the world's first pneumatic metering pump-WILLIAMS;

Second, the electromagnetic diaphragm metering pump

Overview

Electromagnetic metering pump is the use of electromagnetic push rod driven diaphragm in the pump head reciprocating movement, causing the pump head cavity volume and pressure changes, changes in pressure caused by suction valve and drain valve opening and closing, to achieve quantitative liquid inhalation and discharge. The electromagnetic metering pump is a metering pump designed to drive a small flow of low pressure piping liquid by electromagnet, which is popular in the industry with simple structure, low energy consumption, accurate measurement and easy adjustment. The design principle is "simple and practical", but its drawback is that the measurement flow is small (common <90 liters="" per="" hour),="" the="" pipeline="" pressure="" is="" relatively="" low,="" which="" in="" some="" ways="" limits="" its="" industrial=""> Electromagnetic metering pump is the use of electromagnetic push rod driven diaphragm in the pump head reciprocating movement, causing the pump head cavity volume and pressure changes, changes in pressure caused by suction valve and drain valve opening and closing, to achieve quantitative liquid inhalation and discharge.

Applications: Electromagnetic metering pumps are widely used in petroleum, chemical, power metallurgy, mining, shipbuilding, light industry, agriculture, civil and national defense and other departments.

Third, the mechanical plunger metering pump

Overview

There are two kinds of ordinary valve and no valve pump. The plunger metering pump is widely used in the field of petrochemical industry because of its simple structure and high temperature and high pressure. In view of the shortcomings of ordinary piston pump under high pressure condition, a kind of valveless rotary plunger metering pump has been paid more and more attention. It is widely used in syrup, chocolate, cement grinding aids and petroleum additives Equal addition of high viscosity medium. The plunger metering pump is subject to a number of limitations in the application of high-pollution-proof fluid metering applications due to the structural weakness of the metered medium and the in-pump lubricant.


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