How to represent the pump in the process flow chart?

The pump is shown in the process flow chart:

The impeller is installed in the pump housing, fixed on the pump shaft and directly driven by the motor. There is a liquid straw in the center of the pump casing. Liquid enters the pump through the bottom valve and suction pipe. The liquid discharge port on the pump shell is connected with the discharge pipe.

Before the pump starts, the pump shell is filled with conveyed liquid; After starting, the impeller is driven by the shaft to rotate at high speed, and the liquid between the blades must also rotate with it. Under the action of centrifugal force, the liquid throws from the center of the impeller to the outer edge and gains energy, leaving the outer edge of the impeller at high speed and entering the volute pump shell.

In the volute, the liquid slows down due to the gradual expansion of the flow channel, and part of the kinetic energy is converted into static pressure energy, which finally flows into the discharge pipeline at a higher pressure and is sent to the needed place.

When liquid flows from the center of the impeller to the outer edge, a certain vacuum is formed in the center of the impeller. Because the pressure above the liquid level of the storage tank is greater than the pressure at the inlet of the pump, the liquid is constantly pressed into the impeller. It can be seen that as long as the impeller keeps rotating, the liquid will be continuously sucked and discharged.

The working principle of linear pump is different from any other pump. It uses the principle of magnetic levitation and the fluid mechanics structure of spiral ring to realize fluid propulsion, that is, it cancels the shaft, shaft connection and shaft seal structure. After starting, the current is converted into a magnetic field, and the magnetic field force drives the spiral ring to run.

Extended data

In agricultural production, water pump is the main irrigation and drainage machinery. China's rural areas are vast, and a large number of pumps are needed in rural areas every year. Generally speaking, agricultural pumps account for more than half of the total output of pumps.

In mining and metallurgical industries, pumps are also the most used equipment. Mine drainage needs a pump, and mineral processing, smelting and rolling all need pump water supply.

In the power sector, nuclear power plants need nuclear main pumps, secondary pumps and tertiary pumps, while thermal power plants need a large number of boiler feed pumps, condensate pumps, oil-gas mixed pumps, circulating pumps and ash pumps.

In the national defense construction, the adjustment of airplane flaps, tail rudder and landing gear, the turret rotation of warships and tanks, and the take-off and landing of submarines all need pumps. High pressure and radioactive liquid, some also require that the pump does not leak.

In short, whether it is airplanes, rockets, tanks, submarines, drilling, mining, trains, ships or daily life, pumps are needed everywhere, and pumps are running everywhere. This is why the pump is listed as a general-purpose machine, which is the main product of the machinery industry.

Baidu encyclopedia-water pump