Shut-off device for water leakage prevention of indoor water pipe

摘要

The present invention relates to an insulated pipe (250) formed in a water pipe before and after a building wall where a water pipe enters a building so that a water pipe in a building is electrically disconnected from a water pipe outside the building; A transformer and a diode configured to provide a direct current voltage of 1-5 V between the water pipe in the building and the earth terminal; A faucet 161 formed on the faucet and configured to generate an ON signal when the faucet is turned on to turn on the tap water and generate an OFF signal when the tap water is locked; A ball valve 141 that is installed to open and close the water pipe before and after the building wall 200 where the water pipe 100 enters and is normally closed; A bypass pipe 115 connected to the front and rear of the ball valve 141; A solenoid valve 150 installed in the bypass pipe 115 and configured to be opened when the faucet is normally closed; And a reception unit (151) configured to receive a signal from the transmission unit (162) of the faucet and turn on or off the solenoid valve (150). Most of the time without tap water during the day, it is blocked by the shutoff valve at the entrance to the water pipe, thereby reducing the water pressure inside the water pipe inside the building, In addition, a direct current minus of 1-5 V is applied to the internal water pipe which is electrically isolated from the external water pipe by the non-conductive pipe, thereby preventing the corrosion of the negative electrode due to the chemical reaction .