The utility model discloses a novel prefabricated PIR cold insulation
pipe shell which comprises a PIR outer cold insulation shell body and an inner conveying
pipe body, an air bag ring is arranged between the PIR outer cold insulation shell body and the inner conveying
pipe body, an embedded
gasket is arranged on the outer side of the inner conveying pipe body in a sleeved mode, the outer side of the embedded
gasket is connected with one side of the air bag ring, and the outer side of the embedded
gasket is connected with the other side of the air bag ring. The space between the air bag ring and the PIR outer cold insulation shell is filled with heat preservation supporting
layers, multiple sets of mounting empty grooves are evenly formed between the heat preservation supporting
layers,
compressed air bags are arranged in the multiple sets of mounting empty grooves, and the upper ends and the lower ends of the
compressed air bags are connected with two sets of
extrusion arc pieces. The beneficial effects of the utility model are that by using the structure of vibration compression adsorption inflation, stable quantitative gas is kept in the air bag ring of the fastening part, the fastening effect is not influenced, the manual operation is reduced, the overall durability is improved, the use convenience is also improved, and a certain
moisture-proof effect is achieved through water
absorption compression ventilation; and the overall use effect is improved.