Water pump function and principle of the tank

pumps the role of the lead tank, the principle of pump lead tank, pump lead tank design

centrifugal pump start to fill up the water it is the common sense that we all know, why do you want to fill up water? Because of centrifugal pump is only under the condition of full of water, the impeller rotates, the effect to centrifugal force to the water body, water body gain energy by centrifugal force, velocity and head, the water pump can work. In the past, in the design and installation of pump, he always used to install the water pump in the water pool, of course, if from the river and lakes, canals, pump water puddles, then naturally will be installed above the surface of the water pump. But, as a result, it is in front of the water pump start to feed water pump pump shell and the suction pipe filled with water, to start the pump. design and installation, therefore, to install the bottom valve, bottom valve is a check valve, can automatically shut down when the irrigation, ensure water successfully. Practice often appear in the bottom valve closed lax, is very difficult to infuse water, time is long, leaking, use is not very convenient. There are large pumping station design with a special vacuum pump water diversion system, ensure the pump can normal boot.

later, people invented the lead tank, solved the problem of the centrifugal pump to infuse water before start. Tank water pump the effect that is to use conditions have water in the tube, will pump filled with water in advance, to ensure the water pump to start in time. Or, the role of the lead tank is to help remain the state of water pump pump shell.

pump lead tank principle is: tank and water pump is through the inlet pipe connected, the water pump is filled with water in advance, when the pump starts, the impeller rotation will be thrown out of the water in the pump shell, led the water in the tank is added inside the pump shell in time, at this time, the tank will appear in a vacuum, both the negative state, also is to bring the pressure inside the tank under atmospheric pressure, therefore, in the sink, the river, lake, the water in the canals will be under the action of atmospheric pressure, through the pump suction pipe flow into the pump inside the tank, while the lower the pressure inside the water pump pump shell, led the water in the tank will continue to flow into the pump shell, the impeller under the action of centrifugal force, continue to discharge pump shell, the pump will be continuously pumping and water normally.

the pump tank appeared later, a large number of pumps, are generally used tank instead of original irrigation program, to avoid the heavy manual labor, ensure the normal order of the water pump in a timely manner, start, and easy to realize automation.

2, leads tank design and calculation of pumps

pump led the smallest volume of tank generally 30 s is equal to the water pump of water yield, 20 - on time - Between 60 s adjustment, specific should be determined in combination with the actual, namely:

pump lead tank volume V = water pump flow Q× （ 20 - 60) S

60 s of the time is not long, the volume at the same time, want to use the pump suction pipe length, generally speaking, a water pump lead tank volume = the volume of a suction pipe & times; 5, that is to say, the water pump tank volume to meet the two conditions at the same time, both to ensure the water pump for water quantity, and to meet the water filling volume of suction pipe.

in and out of the water pipe diameter should be determined according to calculated the amount of water, generally, the pump led tunnel in and out of the water pipe diameter is consistent, in the pipe flow rate value is lower, because the flow velocity is lower, the less water head loss, the higher the pressure of the pump import, benefit the operation of the pump. Pipe flow value is 0. 9 m/s, or less, 0. 5 - 0. 6m/s。 Velocity is determined, according to & other; Traffic = area & times; Velocity & throughout; Relationship, can determine the area of the suction pipe, the area is determined, thus, the diameter of certain.

depending on the specific situation, sometimes suction pipe is long, will do a larger volume, on the other hand, is smaller.

volume was established, to determine the height of the tank, the height of the lead tank within the highest static water, generally higher than the pump shell top 300 mm to 500 mm, most high is meaningless. According to the size and the height can determine the diameter of the tank. For a larger water pump, the pump motor in more than 90 kw of power, flow in more than 500 m3 / h water pump, the design guide tank, want to combine the site condition of the water water pump installation, can be finalized. Because the greater the water pump, the higher the required conditions.

such as the need to pump water but no storage tank can only use lead tank (pump Water diversion box) The pump products are: chemical pump, magnetic pump, etc.

if you need to lead tank can suck up the water, we suggest the self-priming pump selection choose a suitable products series of products is more ideal.

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