Ejector

The utility model discloses an ejector. The ejector comprises an ejector body and a gland nut; a connecting part and a taper part are arranged at the water outlet end of the ejector body; first external threads are arranged on the connecting part, and axial protruding teeth are arranged on the taper part; first internal threads and a compression connecting boss are arranged in the gland nut, and a compression connecting slope is arranged on the compression connecting boss. The ejector is used in a sprinkling irrigation system, when the water flow rate is adjusted, a locking nut is screwed to enable the axial protruding teeth to shrink in the direction of the center axis under compression of the compression connecting boss, a water outlet of the ejector body is accordingly reduced, and therefore the water flow rate is according decreased; on the contrary, when the water flow rate needs to be increased, the locking nut is screwed to enable the axial protruding teeth to retreat outwards, in this way, limitation of the compression connecting boss to the axial protruding teeth is reduced, the axial protruding teeth outwards expand under the effects of self resilience force and water impact force, the water outlet of the ejector body is accordingly enlarged, and therefore the water flow rate is increased. The ejector is simplified and reasonable in structure and low in manufacturing cost.