Pipeline Adapter Sealing Structure for Weld-Free Refrigerant Joints

The pipeline connection is divided into modular components: a first connection block with external threads and a second connection block with internal threads. These separate modules can be assembled without welding, eliminating the need for complex welding operations while maintaining connection strength through threaded fastening and sealing mechanisms.

A seal ring made of expanded graphite is introduced as an intermediary element between the two connection blocks. This seal ring ensures airtightness and prevents refrigerant leakage, allowing the connection to achieve welding-level reliability through mechanical assembly alone, thus avoiding welding complexity.

The connection blocks are pre-equipped with threading and sealing surfaces during manufacturing. The seal ring is pre-formed from expanded graphite with specific dimensional tolerances. This preliminary preparation allows for rapid assembly on-site without requiring welding equipment or skilled welding operations, significantly improving productivity while maintaining reliability.

By segmenting the pipeline into threaded connection blocks that can be independently manufactured and assembled, the system eliminates time-consuming welding processes. The modular design allows workers to simply screw the connection blocks together, reducing assembly time while ensuring reliable connections through precision threading and sealing.

The seal ring is made from expanded graphite, a composite material with unique properties including high temperature resistance, flexibility, and self-sealing characteristics. This material maintains its sealing effectiveness across extreme temperature ranges while being relatively simple to manufacture and install, replacing traditional sealing methods that fail under thermal stress.

The seal ring's physical parameters (density, flexibility, thermal stability) are optimized through the expanded graphite structure. This material undergoes minimal thermal expansion or contraction across temperature extremes, maintaining consistent sealing pressure and effectiveness. The parameter changes in the graphite structure during manufacturing create a material that adapts to temperature variations without compromising the seal.