| 摘要 |
PURPOSE: To prevent the injection of a propellant by including a two-way valve including a body formed with a central hole between an injection valve and a pipe joint and formed with two interfacing valve seats for mounting a valve member movable to and from between these valve seats and an automatic driving means for driving and controlling the valve member described above. CONSTITUTION: In the normal position of the injection vessel 1, an annular permanent magnet 28 is placed by gravity at the bottom of a shoulder part 29 and the valve member 21 is positioned at the valve seat 23 by the repulsive force of the valve member 21 (the magnetic valve member having a polarity reverse from the polarity of the magnet 28) and the magnet 28 to close an orifice 24 and to obviate the occurrence of the injection of the propellant. When the vessel 1 is turned reversely, the magnet 28 is moved to the shoulder part 30 by gravity and the valve member 21 of the two-way valve 16 is brought into contact with the valve seat 20 by the repulsive force. In this position, the injected matter 13 is housed into a portion of the vessel 1 of a normal position in the upper part. Even more, a recess 25 is allowed to communicate via the orifice 24 with the central hole 19 of the insertion part 22 and, therefore, the injected matter 13 arrives at an injection valve 3 via the recess 26. The propellant is prevented from arriving at the recess 25 as the passage via a riser pipe 44 is closed by the valve member 21 and the orifice 24 is liquid sealed by the injected matter. |
