Jetting device used for water pump

Abstract

A jetting device used for a water pump comprises a drain pipe. The drain pipe comprises an inner pipe (1) and an outer pipe (2), the outer pipe (2) is provided with a first inlet (21), a second inlet (22) and an outlet (23), the inner pipe (1) is disposed in a cavity (24) of the outer pipe, a water inlet (11) of the inner pipe (1) is communicated with the first inlet (21) of the outer pipe (2), the first inlet (21) is connected with a water outlet of a draining pump (6), the second inlet (22) of the outer pipe (2) is connected with a pipeline (3) in a drain tank or blowdown mire, and the outlet (23) of the outer pipe (2) and the second inlet (22) are communicated with a water outlet (12) of the inner pipe (1). The jetting device has the advantages that the second inlet sucks sewage in without arranging the water pump into the drain tank or blowdown mire, and corrosion of the outer surface of the drain pipe from the sewage is avoided. Meanwhile, since the water pump does not need to be arranged in the drain tank or blowdown mire, possibility that the water pump sucks sewage in is effectively avoided, and burning out of the water pump is eliminated.

Description

technical field [0001] The invention relates to a spraying device, in particular to a spraying device used on a water pump. Background technique [0002] A Chinese utility model patent with the patent No. CN200820303950.1 titled "Sewage Pump" discloses a structure, which includes a pump body, an inlet pipe, an outlet pipe, a pressurized water chamber and an impeller, and is characterized in that: pressurized water The rear of the chamber is provided with an impeller cavity, and the impeller is located in the impeller cavity. The utility model has the advantages of simple structure, strong sewage discharge capacity and long service life. However, the sewage pump needs to place the pump body in the sewage to work effectively. The sewage is highly corrosive, which reduces the service life of the sewage pump, and there is a lot of sewage in the sewage. When the pump is working, it is easy to suck the sewage and burn out. Therefore The structure of the sewage pump needs further...

AI Technical Summary

Problems solved by technology

However, the sewage pump needs to place the pump body in the sewage to work effectively. The sewage is highly corrosive, which reduces the service life of the sewage pump, and there is a lot of sewage in the sewage. When the pump is working, it is easy to suck the sewage and burn out. Therefore The structure of the sewage pump needs further improvement

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