| 摘要 |
Sealing means for cooling tubes (3) in air-blast heat exchangers conventionally require soldering or welding which is labour intensive and expensive and also easily damaged when the cooling system is subjected to vibration or thermal shock. Additionally, traditional cooling systems cannot be easily modified and faulty tubes not easily replaced. The invention provides means and a method for sealing cooling tubes (3) using sealing members (4) of elastomeric material around the junctions of the tubes with a tank (1), clamping the elastomeric material to generate a compression force to seal the elastomeric material (4) against the tubes (3) and restricting lateral movement of the material to enhance the seal. Cooling tubes (3) may also be sealed into a tank (1) using two spaced seals (4, 8) and a controlled leakage path via a drain communicating (21) with the space between the seals. Each seal (4, 8) is preferably of the compressed elastomeric type. Using the invention provides better and cheaper seals and allows tubes to be changed more easily. |
