| 摘要 |
PURPOSE:To perform safety operation in a short time and to make successive opening work easier by a method in which a steel bar is inserted into a mud gun barrel after filling said barrel with mud, then a tap hole is blocked by the steel bar with mud discharged. CONSTITUTION:After filling a mud gun 1 with mud 5, a steel bar 6 of prescribed length is inserted into the mud 5 in a barrel 3 through a nozzle outlet 2a. When a tap hole is blocked, the nozzle outlet 2a of the mud gun 1 is connected to the tap hole 8. By pushing a cylinder 4 forward, the mud 5 fills the hole 8 and blocks it in the condition that the mud 5 entirely wraps the bar 6. Just before tapping, the blocked part is holed with a drill until the drill reaches the rear end of the bar 6. Then, by melting the bar 6 with oxygen, a hole is easily bored through the hole 8. |
