The working principle and applicable industry of plunger metering pump
Definition of 1. plunger metering pump
Plunger metering pump is a kind of special positive displacement pump that can meet various strict process requirements, and its flow rate can beStepless adjustment within the range of 0-100%, widely used for conveying liquids (especially corrosive liquids). Metering pump is a kind of fluid transport machinery, its outstanding feature is to maintain a constant flow, and the discharge pressure has nothing to do. The metering pump can simultaneously complete the functions of transportation, metering and adjustment, simplifying the production process. Metering pumps are widely used in petrochemical, pharmaceutical, food and other industrial fields because of their own prominence.
Structure of 2. plunger metering pump
The pump consists of a motor, a transmission box and a cylinder. The transmission box assembly is composed of a worm gear mechanism, a stroke adjustment mechanism and a crank connecting rod mechanism; the high adjustment stroke is achieved by rotating the adjustment handwheel, thereby changing the eccentricity of the moving shaft to achieve the purpose of changing the stroke of the plunger (piston).
The working principle of 3. plunger metering pump
The worm is driven by the motor coupling, the main shaft and the eccentric wheel rotate through the worm gear, and the eccentric wheel drives the sliding adjustment seat of the arcuate connecting rod to reciprocate. When the plunger moves to the rear dead center, a vacuum is gradually formed in the pump cavity, and the suction valve opens to inhale the liquid; when the plunger moves to the front dead center, the suction valve closes and the discharge valve opens. When the plunger moves further, the liquid is discharged. In the reciprocating operation of the pump, a continuous pressure and a quantitative discharge of liquid are formed. The flow adjustment of the flow adjustment pump is to drive the adjustment screw to rotate by rotating the adjustment handwheel, thereby changing the distance between the arcuate connecting rods and changing the movement stroke of the plunger (piston) in the pump cavity to determine the flow. Adjust the hand wheel scale to determine the plunger stroke, accuracy95％。
4. plunger metering pump characteristics and applicable industry characteristics
1. This kind of metering pump has superior performance, in which the diaphragm metering pump has absolutely no leakage, high safety performance, accurate metering and transportation, the flow rate can be adjusted arbitrarily from zero to the limit large quota value, and the pressure can be arbitrarily selected from the normal pressure to the limit large allowable range.
2. The adjustment is very simple and intuitive, the work is stable, no noise, small size, light weight, easy maintenance and use, and can be used in parallel.
3. This kind of metering pump has many varieties and complete performance. It is suitable for conveying -30 to 450 degrees, has a viscosity of 0-800 mm/s, a limit discharge pressure of 64Mpa, a flow range of 0.1-20000 L/h, and a metering accuracy of less than 1%.
4. According to the use, the metering pump can be manually and frequency adjustment flow, can also realize remote control and computer automatic control. This kind of plunger metering pump is widely used in petroleum industry, natural gas exploitation, chemical industry, oil refining, thermal power plant, industrial and mining, food, pharmaceutical, scientific research, printing and dyeing, papermaking, environmental protection, water treatment industry, etc.
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2024-01-02
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