Spring blanking plug

The utility model discloses a spring blanking plug has solved and has easily caused water conservancy anchor secondary to sit a scheduling problem when blanking plug in the past targets in place, and specifically include the main part and support the card body, the main part is cylindric, the last port threaded connection gland of main part, and second section of main part is the double containment section, sets up tertiary seal groove in the primary seal section in the double containment section, sets up the two -stage seal groove in the secondary seal section in the double containment section, the cannelure has still been opened to first section of main part, support the card body and be two, fix in the cannelure of main part through the pin after these two the lower extreme coincide of supporting the card body, and two supported horizontal fixed connection spring between the card body, under the spring is in natural state, supports the free end that the card personally experienced sth. Part of the body and