Sand control water seal structure

The utility model provides a sand control water seal structure which characterized in that: including water seal support ring, water seal and water seal seat, water seal support ring, water seal and water seal seat be on the plunger of water pump is located to the cover in proper order backward in the past, three's inboard all laminate in the surface of plunger, three's the outside is then spacing by the pump head structure of water pump, wherein, the front end of water seal support ring extends the protruding sand control lip that is equipped with forward, and this sand control lip is closely laminated the plunger of water pump is and work as when the plunger moves to the back initial point, the sand control lip can the cladding the outer fringe of the preceding terminal surface of plunger. The utility model has the advantages of the sand control is effectual, simple structure, can promote the life of water pump by a wide margin, just can reduce the quality of water requirement to intaking, improve the suitability of water pump.