| 摘要 |
An example shut-off device includes an upper valve body, and a lower valve body. The lower valve body connects to the upper valve body to surround a section of a pipe to form a chamber therein. A cutting blade in the chamber is tightening against the pipe to cut through the pipe and at least partially seal an opening in the cut pipe. Following a repair to the pipe, the cutting blade may be operated as a gate valve, opening to permit fluid flow through the pipe, and closing to at least partially restrict or fully stop fluid flow through the pipe. Also disclosed is an emergency repair for a pipe including a sleeve housing configured to be opened and closed around a portion of a pipe to be repaired, and a tightening mechanism configured to reduce an inner diameter and tighten against the pipe to be repaired. |
