| abstract |
The present invention relates to a kind of double-canopy retaining mechanisms, belong to sealing device technical field.When shielding bung and shielding bucket locking, bung locking pin is retracted inside the sealing cover of bucket room, and airtight transhipment bung and shielding bung unlock, airtight transhipment bung and airtight transferring barrel fasten；After shielding bung and shielding bucket unlock, bung locking pin is protruded into the card slot of bung locking pin sheave, and shielding bung and airtight transferring barrel cover lock are fixed, airtight transhipment bung and bucket room sealing cover synchronous on-off.It is provided with locking closure/unlock driving cylinder on the shielding bung, shields the rotation of bung retaining ring and is driven with the flexible of bung locking pin by locking closure/unlock driving cylinder is synchronous.The present invention is suitable for storage transhipment volatility radioactive substance, and transfer operation overall process keeps airtight conditions, prevents radioaerosol from leaking to personnel's operating area, and the risk for causing radioaerosol to pollute significantly reduces. |