Low-water-sucking water pump

Abstract

The invention discloses a low-water-sucking water pump, which comprises a pump shell, a first water outlet, a water inlet, a motor and an impeller, wherein the first water outlet is arranged on one side of the pump shell; the impeller is fixedly arranged on the spindle of the motor; the bottom of the pump shell is fixedly provided with a base; a pump cavity is formed by the base and the pump shell; the motor and the impeller are both arranged in the pump cavity; the pump shell is provided with a vent valve device with a steel ball; the water inlet is arranged on the position relatively below the impeller on the base; the upper part of the impeller is provided with a fairing; the fairing passes through the spindle and is in sealing with the spindle by a sealing ring; an inner cavity is formed by the fairing and the base; and the fairing is provided with a second water outlet from which conveying liquid can freely enter and leave. The invention aims to provide the low-water-sucking water pump which has the characteristics of high pumping speed, good effect and long service life, can be automatically started and quickly pumped, can be used for pumping or dewatering water pools, basements or other occasions with the lower water level.

Description

technical field [0001] The invention relates to a submersible pump, in particular to a low water suction pump. Background technique [0002] The submersible pump is a widely used water treatment tool in daily life. The shadow of the submersible pump can be seen in both agricultural production and industrial processing. The difference from ordinary water pumps is that it works underwater. When used, the whole The unit dives into the water and extracts groundwater to the surface. It is an indispensable tool in domestic water, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship load adjustment and fountain landscape. Before starting the pump, the suction pipe and the pump must be full liquid. After the pump is turned on, the impeller rotates at a high speed, and the liquid in it rotates with the blades. Under the action of centrifugal force, it flies away from the impeller and shoots out. The speed of the injected liquid gradually slows down in the dif...

AI Technical Summary

Problems solved by technology

After the pump is turned on, the impeller rotates at a high speed, and the liquid in it rotates with the blades. Under the action of centrifugal force, it flies away from the impeller and shoots out. The speed of the injected liquid gradually slows down in the diffusion chamber of the pump casing, and the pressure gradually increases. The outlet is discharged, and a vacuum low-pressure area without air and liquid is formed at the center of the blade because the liquid is thrown to the surroundings. The liquid in the liquid pool flows into the pump through the suction pipe under the action of the atmospheric pressure on the pool surface, and the liquid is continuous like this It is continuously sucked up from the liquid pool and continuously flows out from the pump outlet, but the motor and the impeller in the current submersible pump are all in the same space, making the space of the pump chamber relatively large. When low water level pumping is required, it is difficult to quickly remove the air in the pump chamber, so it is difficult to establish a continuous suction effect when the water level is low, so it is impossible to pump water at a water level of about 5mm, which makes the pumping efficiency low. Restrictions, and the motor is cooled by water during work. If there is no circulating water to cool the motor, the motor will heat up quickly, so the motor is easy to burn out, reducing the overall service life, so it needs to be improved

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