| 摘要 |
The present invention is to provide a check valve backflow test device capable of performing a precise backflow test by rapidly discharging the downstream pressure of a check valve for a test to make pressures at the front and the rear ends of the check valve different and a method. In the check valve backflow test device to achieve the purpose according to the present invention, a check valve downstream pipe is connected to the downstream of the check valve for a test, and a first rupture disk is connected to the check valve downstream pipe. Also, a secondary pressure drum is connected to the first rupture disk, and a second rupture disk, a discharge valve, a high-pressure nitrogen gas supply pipe, and a water supply valve are connected to the secondary pressure drum. The check valve backflow test method to achieve the purpose according to the present invention is a check valve backflow test method using the check valve backflow test device mentioned in a claim 1. The check valve backflow test method comprises: a step of installing the check valve for a test, the first and second rupture disks, and the secondary pressure drum (S100); a step of charging water to a check valve upstream pipe, the check valve downstream pipe, and the secondary pressure drum by opening a water shutoff valve (S200); a step of pressurizing nitrogen to the check valve upstream and downstream pipes by controlling the high-pressure nitrogen gas supply valve (S300); a step of opening the discharge valve connected to the secondary pressure drum (S400); a step of discharging the fluid to the outside while the first and second rupture disks are ruptured; a step of measuring the pressures at the front and rear ends of the check valve for a test and the opening and closing time of the check valve (S600); and a step of measuring the leaked amount of the check valve for a test (S700). |
