Pressure plugging is a common pipeline maintenance and repair technique that can be used to plug and repair pipelines without interrupting production. Its principle is to plug the pipe or repair the hole in the pipe by inserting a strip expansion body of special material into the pipe and then expanding it by external force or internal pressure.

The role of sealing with pressure mainly has the following aspects:

Plugging pipeline loopholes: During the use of pipelines, there may be loopholes due to various reasons (such as corrosion, wear, erosion, external damage, etc.). Pressure plugging technology can precisely plug these holes, stop liquid or gas leakage, and ensure stable operation of the pipeline.

2. Repair the pipeline: in the long-term use of the pipeline, there may be rupture, damage and other situations, with pressure sealing technology can be inserted into the ribbon expansion into the pipeline, the part of the press repair, restore the integrity and strength of the pipeline.

3. Increase the strength of the pipeline: the expansion body with pressure sealing has a certain strength and toughness, and expands into a spiral or spherical shape after being inserted into the pipeline, which can increase the strength and stability of the pipeline, and improve the pressure and tensile strength of the pipeline.

4. Reduce pipeline maintenance time: Compared with traditional pipeline maintenance methods, pressure sealing technology does not need to interrupt production, and can be repaired during pipeline operation, greatly reducing maintenance time and shutdown losses.

The principle of sealing with pressure is as follows:

1. Strip expansion material: The strip expansion used in pressure sealing technology is usually made of rubber material or other elastic materials, which has good sealing performance and expansibility. After the pipe is inserted, the ribbon expansion body can be expanded by external force or internal pressure, fill the gap in the pipe, and make close contact with the pipe wall to achieve the effect of blocking or repair.

2. External force or internal pressure: Pressure plugging technology can apply force or pressure in two ways. One way is by applying an external force through a manual or mechanical tool to make the strip expand. The other way is through the pressure in the pipeline, the use of medium flow or gas expansion to apply internal pressure, so that the ribbon expansion. These two methods can make the ribbon expansion to achieve the expected expansion effect, to achieve the purpose of plugging or repairing the pipeline.

3. Blocking or repair effect: The expansion of the strip expansion body can fill the gap in the pipeline and make close contact with the pipe wall to form an effective blocking or repair effect. The sealing performance of the strip expansion can prevent the leakage of liquid or gas and ensure the stable operation of the pipeline.

In short, the sealing technology with pressure is a flexible, efficient and reliable method of pipeline maintenance and repair. Through the expansion of the expansion body, the pipeline is blocked and repaired to ensure the stable operation of the pipeline.