Check valve for sewage discharge of water meter protection box

摘要

The present invention relates to a check valve for discharging sewage of a water meter protection box, and more particularly, to prevent corrosion of a water meter and keep the inside of the protection box by allowing the sewage that has flowed into the protection box containing the water meter to be more easily discharged. It was invented to prevent member damage. In particular, it is possible to improve assembly convenience and marketability by simplifying the configuration of a check valve that quickly and naturally drains water even if water flows into the protection box. In the configuration of the present invention, a pair of protective pipes 20 for receiving the inlet and outlet pipes (S) therein are formed on both sides of the bottom plate 11, and both sides are connected to the inlet and outlet pipes (S). A protection box body 10 for accommodating the meter T therein; An outer cover 30 is provided with a heat insulating member 40 surrounding the water meter (T) inside the protection box body 10, and covers and protects the upper portion of the protection box body 10; The inlet and outlet pipes (S) are fitted in the center so that the upper fitting ring 53 is closely assembled to the outer diameter surface of the inlet and outlet pipes (S), and the support part 51 is the bottom of the protective box body 10 A waterproof cover 50 assembled on the plate 11 to airtightly shield the protection box body 10 and the protection tube body 20; A check valve 60 is further included that is mounted inside the drain pipe 13 provided on the bottom plate 11 of the protection box body 10 to drain water in one direction to the outside; The check valve 60, A closing member 61 for blocking the discharge hole 16 by being caught by the locking part 15 protruding from the inner surface of the drain pipe 13; A return spring (67) located below the closing member (61) to return and move the closing member (61) moved downward; It is configured to support the lower portion of the return spring (67), and the drain pipe (13) is configured to include a closing cap (70) coupled to the lower end.