The working principle of the pipe sealing airbag is to use the airbag to fill it with gas and expand it, which is closely fitted with the inner wall of the pipe, thereby blocking the passage of water or airflow in the pipe. The details are as follows:
· Inflatable expansion: Pipeline sealed airbags are usually made of elastic materials such as rubber, which have good flexibility and inflatability. When in use, fill the air bag with air or other gas through the air nozzle. As the gas is filled, the volume of the airbag gradually increases until the entire pipe cross-section is filled.
· Sealed fit: During the expansion process of the airbag, its outer wall will squeeze evenly in all directions of the inner wall of the pipe, and closely fit with the inner wall of the pipe. Because the airbag material has a certain elasticity and toughness, it can adapt to pipes of different shapes and sizes. Even if there are certain uneven or irregularities in the inner wall of the pipe, the airbag can also come into close contact with it to form a seal.
· Blocking medium: When the airbag fits into the inner wall of the pipe to form a seal, it can effectively prevent the passage of water, airflow or other fluid media in the pipe. The pressure under the airbag interacts with the pressure of the fluid in the pipeline, and when the equilibrium state is reached, the pipeline is sealed. For example, in drainage pipes, airbags can prevent sewage from continuing to flow during maintenance or testing to facilitate the progress of related work.