| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint capable of being detached from a container side pipe without leaking a chemical requiring caution in handling due to toxicity and stimulation to the outside by a backflow or the like at the time of detaching the container side pipe. SOLUTION: This joint is composed of an upper joint 11 for connecting a suction pump, a lower joint 31 for connecting the container side pipe 3 and a nut 21 for connectably and detachably connecting the joint 11 and the joint 31. On both upper and lower ends of the joint 11 in a cylindrical shape, ball valve seats 16 and 17 and ball valves 18 and 19 for making liquid flow in a transfer direction and preventing the backflow are provided. The nut 21 is made rotatable so as to cover the joint 11 and is locked and stationed in the nut station part 14 of the joint 11, an inner screw is provided in a lower joint screw fastening part 24 and an O ring 36 is interposed between the joints 11 and 31 so as to air-tightly connect the joint 11 and the joint 31. An outer screw is provided in the upper connection part of the joint 31, the screw and the inner screw 26 of the nut 21 are screwed, the nut 21 is rotated in a loosening direction and the joint 31 and the pipe 3 are detached. |
