Pressurized anti-reflux water pump

Abstract

The invention relates to the field of water pumps, in particular to a pressurized anti-reflux water pump which comprises a water pump body, an inlet and outlet mechanism, an inlet pipe, a discharge pipe, an anti-reflux mechanism, a placement barrel, a sealing plug, a sealing ring, a blocking rod, an inner frame, a limiting rod, a sliding block, an exhaust mechanism, an exhaust pipe, an air plug, an abutting rod, a connecting block, a first spring, an air guide rod, a floating ball and a filtering mechanism. After water enters the inlet pipe, due to the impact force of water flow, the bottom end of the blocking rod can be extruded and pushed, at the moment, the blocking rod can slide in the inner frame and is gradually lifted, at the moment, the water flow can flow into the inlet pipe in the water pump main body from the opened notch and is finally discharged through the discharge pipe, and after the water pump main body stops working, the blocking rod can slide in the inner frame. When the water pump is used, due to the fact that the blocking rod is not impacted by water flow any more, the blocking rod can fall mainly under the action of gravity to block the notch in the inlet pipe again, and therefore the situation that water stored in the water pump body flows back can be prevented when the water pump is used, and inconvenience in use is avoided.

Description

technical field [0001] The invention relates to the field of water pumps, in particular to a pressurized anti-backflow type water pump. Background technique [0002] A water pump is a machine that transports or pressurizes liquid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, increasing the liquid energy, and is mainly used to transport liquids including water, oil, acid-base liquid, emulsion, suspoemulsion and liquid metal. Liquids, gas mixtures and liquids with suspended solids can also be transported. The technical parameters of pump performance include flow, suction, head, shaft power, water power, efficiency, etc.; according to different working principles, it can be divided into volumetric pumps, vane pumps and other types. Positive displacement pump uses the change of its working chamber volume to transfer energy; vane pump uses the interaction between rotating blades and water to transfer energy, including centrifugal...

AI Technical Summary

Problems solved by technology

[0003] In actual use, in the actual operation of some water pumps, when the water pump stops working, there is any part of the water stored in the cavity of the pump body, which may cause backflow and cause inconvenience to use; When there is a large amount of gas in the liquid, a large number of air bubbles will be generated during the pumping process. These gases are difficult to discharge in the pump and may have a certain impact on the inside of the pump.

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