A check valve for taking out material anti -return

The utility model provides a check valve, include valve body, case, telescopic baffle, return spring, reach the mounting, the valve body is equipped with the inner chamber, and the valve body is equipped with import and the export that is used for the intercommunication external world and inner chamber, the middle part of mounting is equipped with an installation through -hole, and the side of installation through -hole is equipped with the little through -hole of the inner chamber of intercommunication mounting both sides, the mounting is fixed to be set up at the inner chamber, and import and export lie in the both sides of mounting, the case is fixed to be set up at the installation through -hole, return spring's the fixed telescopic baffle that is provided with of one end, telescopic baffle and return spring compress tightly between mounting and import, and the case is hugged closely to return spring's the other end, telescopic baffle covers the import. The utility model discloses still provide another kind of check valve. Through the structure, the check valve can realize " non return " prevent the refluence the function to it is respond well. And check valve installation easy operation, the liquid flow is unobstructed, guarantees the normal of whole liquid conveying process.