Pressure plugging is a sealing technique commonly used in pipes, containers, and other equipment to stop fluid or gas leakage. In industrial production and daily life, we often encounter the need for pressure sealing, such as pipeline maintenance, valve replacement, equipment maintenance and so on. This paper will introduce the principle, method and application scenario of sealing with pressure in depth.

The principle of sealing with pressure is to use sealing elements (such as sealing gaskets, fillers, etc.) and tools (such as fixtures, syringes, etc.) to seal the equipment to form a sealing layer, thereby preventing fluid or gas leakage. The key of sealing with pressure is to choose the appropriate sealing material and method, and carry out the technical operation according to the specific situation.

First of all, the selection of the appropriate sealing material is the basis of sealing with pressure. Common sealing materials include rubber gaskets, metal gaskets, fillers, etc. When selecting the sealing material, it is necessary to consider factors such as working temperature, working pressure, and medium properties to ensure the sealing effect and stability.

Secondly, there are many methods of sealing with pressure, and the appropriate method is selected for operation according to the specific situation. The following are several common pressure sealing methods:

1. Rubber sealing gasket: Place the rubber sealing gasket in the position that needs to be blocked, and apply pressure through the bolt or fixture to make the gasket closely fit with the surface of the device to form a seal. This method is suitable for smaller pipes and containers.

2. Packing: the packing (such as flexible packing, expansion packing, etc.) is injected into the sealing position to form a seal through the filling and expansion effect. Packing is suitable for large pipes and containers, and also has good adaptability for irregular shaped equipment.

3. Elastic fixture: Use elastic fixture (such as spring fixture, bellows fixture, etc.) to fix the fixture in the position that needs to be blocked, and maintain the close contact between the fixture and the surface of the equipment through the elastic force, so as to achieve the sealing. This method is suitable for smaller pipes and containers, and has the characteristics of easy installation and simple maintenance.

4. Injection plugging: Use a syringe to inject the plugging agent (such as glue, sealant, etc.) into the plugging position, so that the plugging agent fills the gap on the surface of the device, and quickly solidifies to form a sealing layer. Injection plugging is suitable for smaller pipes and containers, and is also suitable for irregularly shaped equipment.

The sealing with pressure is suitable for the sealing needs of various industrial fields and daily life. For example, in the petrochemical, energy, water treatment, food manufacturing and other industries, often need to carry out pipeline maintenance and equipment replacement, pressure plugging is an effective technical means. In daily life, problems such as faucet leakage and pipe breakage can also be solved by sealing with pressure.

However, stability considerations should be taken into account when operating with a pressure plug. Before plugging with pressure, ensure that the equipment is in the shutdown state and take corresponding stabilization measures to avoid accidents. At the same time, the operator should have the relevant technical knowledge and skills, and operate in strict accordance with the operating procedures to ensure the sealing effect and stability.

In summary, pressure sealing is a commonly used sealing technique that can effectively stop fluid or gas leakage. The effective sealing effect can be achieved by selecting the appropriate sealing materials and methods and performing the technical operation according to the specific conditions. The sealing with pressure is suitable for the sealing needs of various industrial fields and daily life, but the stability matters must be paid attention to during operation. Only by mastering the principle, method and stability requirements of sealing with pressure can it be applied in practice.