Basic principle: when the piston moves from left to right, negative pressure is formed in the pump cylinder, and the liquid in the storage tank enters the pump cylinder through the suction valve. When the piston moves from right to left, the liquid in the cylinder is squeezed, the pressure] increases, and is discharged by the discharge valve. Piston reciprocating once, each suction and discharge of a liquid, known as a working cycle; this pump is called a single-action pump. If the piston back and forth once, each suction and discharge of liquid twice, known as double-action pump. Piston from one end to the other end, known as a stroke.
Structural features: ① high efficiency and high efficiency zone is wide. ②Can reach a very high pressure, the pressure change almost does not affect the flow rate, and thus can provide a constant flow rate. ③With self-priming ability, it can convey liquid and gas mixtures, and the specially designed one can also convey mud and concrete. ④The flow rate and pressure have large pulsation, especially single-acting pumps, due to the acceleration of the piston movement and the intermittent liquid discharge, the pulsation is greater. It is usually necessary to set up air chamber in the discharge pipe (sometimes also in the suction pipe) to make the flow more uniform. The use of double-acting pumps and multi-cylinder pumps can also significantly improve the unevenness of flow. ⑤ Low speed, large size, more complex structure than centrifugal pumps, the need for specialized pump valves, manufacturing costs and installation costs are higher. Piston pumps are mainly used for water supply, and manual piston pumps are a widely used household domestic water pump. Piston pumps are used to provide high-pressure liquid source, such as the high-pressure water supply of hydraulic presses, it and piston pumps can be used as drilling mud pumps, pumping pumps in oil mines. Diaphragm pumps are especially suitable for conveying highly toxic, radioactive, corrosive liquids, precious liquids and liquids containing abrasive solids. Diaphragm pumps and piston pumps can also be used as metering pumps.
Shanghai Equan Pump Industry Co., Ltd. products WB series reciprocating pumps, stainless steel electric reciprocating pumps, compact structure, design, stainless steel pump piston ring using water company special bowl-shaped PTFE ring, wear-resistant, corrosion-resistant, sealing good. This pump high pressure plow adopts plunger double valve structure, low pressure type adopts piston ball valve structure, the design of the action is sensitive, closed and reliable. According to different flow rates and pressures, it is mainly used for long-distance transportation of water, wharf transportation of supplies, pump transportation of crude oil and methanol. Tanker trucks, oil depot loading and unloading, hot water recovery and recycling for pharmaceutical, brewing, chemical, petroleum and so on.
Working principle:
When the piston moves from left to right, negative pressure is formed in the pump cylinder, then the liquid in the storage tank enters into the pump cylinder through the suction valve. When the piston moves from right to left, the liquid in the cylinder is squeezed, the pressure] increases, and is discharged by the discharge valve. Piston reciprocating once, each suction and discharge of a liquid, known as a working cycle; this pump is called a single-action pump. If the piston back and forth once, each suction and discharge of liquid twice, known as double-action pump. The piston is moved from one end to the other, known as a stroke.
Installation and flow:
Reciprocating pumps do not need to be filled with liquid when starting, because the reciprocating pump has the ability to self-priming, but its suction on the height of the vacuum with the installation of the pump in the region of the atmospheric pressure, the nature of the liquid and the temperature and change, so the installation of reciprocating pumps also have a certain limit on the height of the installation. The flow rate of reciprocating pump can not be adjusted by the valve on the discharge pipe, but should be realized by bypassing the pipe or changing the number of piston reciprocation and the stroke of the piston. Before starting the reciprocating pump, the valve in the discharge line must be opened. The piston of the reciprocating pump is connected to the prime mover by a connecting rod crankshaft. The prime mover can be electric or steam. Reciprocating pumps are suitable for high pressure head, small flow, high viscosity liquid transportation, but not suitable for transporting corrosive liquids. Sometimes driven directly by the steam engine, conveying flammable and explosive liquids.
Top ten applications:
1. Wastewater discharge of enterprise units.
2. City sewage treatment plant discharge system.
3. Subway, basement, human defense system sewage pump system drainage station.
4. Hospitals, hotels, high-rise buildings sewage discharge.
5. Sewage pumps are used in sewage drainage stations in residential areas.
6. Municipal engineering, construction sites in the thin slurry discharge.
7. Water supply device of water plant.
8. Sewage discharge from farms and irrigation of rural farmland.
9. Exploration mines and water treatment equipment supporting.
10. Sewage pumps can replace the shoulder, sucking and delivering river mud.