Pressure plugging is a commonly used technology, widely used in pipelines, containers, equipment and other industrial fields, used to temporarily seal the fluid or gas in pipelines or containers for maintenance, repair, detection and other work. The use principle of sealing with pressure mainly includes the selection of appropriate sealing equipment, the application of appropriate pressure and effective sealing methods.

First of all, choosing the right plugging equipment is the key to sealing with pressure. According to the size, material, working pressure and temperature of the blocked pipeline or container, we can choose different types of plugging equipment, including pneumatic plugging device, hydraulic plugging device, mechanical plugging device and so on. These plugs are usually made of pressure-resistant materials and can withstand high pressure and high temperature environments to ensure a stable and reliable plug.

Secondly, the application of appropriate pressure is a necessary condition for sealing with pressure. By applying pressure, the sealer can be tightly fitted to the inner wall of the pipe or container, creating an effective seal. The pressure can be applied by hydraulic pump, pneumatic pump, manual pump and other devices. When applying pressure, it is necessary to select the appropriate pressure range according to the working pressure of the pipeline or container to ensure that the sealing appliance can withstand the applied pressure and maintain a stable sealing effect.

Finally, effective sealing method is the key link of sealing with pressure. Commonly used sealing methods include rubber sealing, metal sealing and packing sealing. Rubber seal is a common sealing method, through the elasticity and plasticity of rubber material, so that the plug can be tightly fitted with the inner wall of the pipe or container. The metal seal achieves effective sealing effect through the deformation and elasticity of the metal material. Packing seals fill gaps in pipelines or containers by filling sealing materials, such as fillers, sealants, etc., to prevent fluid or gas leakage.

In practical applications, the steps of sealing with pressure generally include the following steps: First, choose the appropriate sealing appliance, according to the size of the pipeline or container, material and other parameters to choose; Secondly, clean the sealing position to ensure that no impurities, grease and other substances interfere with the sealing effect; Then, the plugging device is placed in the plugging position and the appropriate pressure is applied through the corresponding device; Finally, the sealing test is carried out to ensure the sealing effect is good. If a long period of plugging is required, regular inspection and maintenance are also required to ensure the reliability and stability of the plugging appliance.

In general, the principle of the use of pressure sealing involves the selection of the appropriate sealing appliance, the application of the appropriate pressure and the effective sealing method. Through reasonable selection and operation, pressure plugging can realize the temporary closure of pipelines, containers and other equipment, providing convenience and stability for subsequent work.