| 摘要 |
PROBLEM TO BE SOLVED: To provide a mixture-preventive apparatus of liquid wherewith unnecessary going up to and down from the upper part of a tank truck becomes unnecessary and occurrence of omission in works can be prevented. SOLUTION: For an apparatus for preventing mixing of a liquid at unloading of a liquid transport vehicle which is equipped with a plurality of tank chambers, operating handles for unloading bottom valves provided respectively at the tank chambers and bottom valve locking devices for controlling the operations of the operating handles for unloading bottom valves, and constructed in a structure wherein the bottom valve locking device, once locking with locking keys 2, cannot be released unless unlocking key 5 respectively corresponding to desired devices are used, a device 4 for keeping keys classified by kinds of liquid which houses the unlocking keys 5 for releasing the bottom valve locking devices and liquid spout metal locks and is in a structure wherein remaining unlocking keys cannot be taken out when any one of the unlocking keys is taken out and in the case of housing the taken-out unlocking key 5, the said unlocking key cannot be housed unless the locking key 2 locking the bottom valve locking device is not used is provided.
|
