In-depth Analysis of Pressure-Resistant Sealing Technology: The Core Function and Operating Secrets of the Sealing DeviceAt 3 o'clock in the morning, a pipeline leakage occurred in a city. A professional repair team arrived promptly. Surprisingly, they did not shut down the entire pipeline network system. Instead, they began a special operation on the pipeline with a pressure of 3.5 megapascals - a pressure-sealing operation. After several hours, the leakage point was completely controlled, and the oil supply to the entire city was never interrupted. Pressure-sealing technology: A revolutionary technique for non-stop pipeline maintenance Pressure sealing, a technique that sounds extremely challenging, has completely transformed the pipeline maintenance industry. It enables safe repairs or renovations of damaged pipelines without interrupting the flow, discharging the gas, or disrupting normal operations. From urban gas pipelines to oil transportation pipelines, from chemical enterprises to water supply systems, this technology is safeguarding the "life line" of modern industrial society. The core advantage of this technology lies in minimizing downtime losses and avoiding the production halt, energy waste and environmental risks caused by traditional maintenance methods. When the internal medium of the pipeline continues to flow and the pressure persists, how can pressure-sealing be safely accomplished? The answer lies in the combination of a set of precise equipment and rigorous processes. And the sealing device is precisely the core component of this system. Stent: The "heart component" for pressure-sealing The plug device is the most crucial component in the pressure-sealing technology. Its main function is to establish a physical barrier within the pipeline, isolating the working area from the normal operating pipeline system. It can be regarded as a "movable valve" inside the pipeline, but its design and operation are far more complex and precise than ordinary valves. Based on its working principle and technical characteristics, the blocking devices can be mainly classified into the following categories: Mechanical occluder These types of plugs establish a seal within the pipeline through mechanical means. Common examples include: · Foldable plug: It features a foldable umbrella-like structure. Once inserted into the pipeline, it unfolds and achieves sealing through back pressure. · Tubular plug: Composed of multiple sealing units, it is capable of adapting to variations in pipe diameters. · Plug-type seal: The elastic plug body is pushed into the pipeline by external pressure to deform and achieve sealing. 2. Airbag-type occluder By utilizing the principle of inflation, a high-strength rubber airbag is sent to the designated position and then inflated to expand, forming a seal that closely adheres to the pipe wall. This type of sealing device is suitable for medium and low pressure environments. The operation is relatively simple, but it requires a higher degree of smoothness of the inner wall of the pipeline. 3. Occlusive Stent Special sealing devices designed for specific working conditions, such as: · Butter Wall: A temporary barrier is formed by stacking special sealing grease inside the pipeline. · Ice blockage: Utilize low temperature to freeze the medium inside the pipeline to form an ice plug (applicable only to water medium) For any type of plug device, the basic design requirements include: sufficient structural strength to withstand pipeline pressure; reliable sealing performance to prevent medium leakage; good passability to reach the predetermined position smoothly; and safe operability for easy installation and retrieval. Technical implementation: The eight key steps for using the occluder Pressure sealing is a highly specialized operation that requires strict adherence to standardized procedures: Pre-evaluation and preparation Pipeline condition assessment: Comprehensive inspection of pipeline material, wall thickness, pressure, medium characteristics and operational history 2. Design of the blocking plan: Select the appropriate type and size of the blocking device based on the assessment results. 3. Safety Analysis: Identify potential risks, formulate emergency plans, and delineate safe operation areas. Equipment Installation and Commissioning Installation of the opening equipment: Install the dedicated pressure-resistant opening machine at the designated position. This is the "entrance" through which the sealing device can enter the pipeline. 2. Pressure balance test: Ensure that all connection points are securely sealed and capable of withstanding the working pressure. Blocking implementation 1. Insertion of the occluder: Using a dedicated conveying device, the occluder is sent to the predetermined position within the pipeline. 2. Sealing establishment: Activate the sealing device in accordance with the technical specifications to establish a reliable sealing barrier. 3. Effect verification: Use various methods such as pressure testing and leak detection to verify the sealing effect. Completion of tasks and recovery · Pipeline repair: Conducting pipeline replacement, maintenance or renovation operations under the condition of pipeline sealing and protection. · Retrieval of blocking devices: After the operation is completed, safely retrieve the blocking devices · Pipeline restoration: Use specialized blocking equipment to seal the opening points and restore the integrity of the pipeline structure.