Analysis and Performance Optimization Research of Pressure-Resistant Opening Equipment SystemIn modern industrial pipeline systems, the pressure-bearing hole opening technology, with its high efficiency and safety features, has become the preferred solution for pipeline maintenance and renovation. This article will delve into the system composition and performance optimization strategies of the pressure-bearing hole opening equipment. In modern industrial pipeline systems, the pressure-bearing hole-making technology, with its features of no shutdown and safety and reliability, has become the preferred solution for pipeline maintenance, renovation and expansion. This technology enables hole-making operations on pipelines under pressure, avoiding the huge economic losses caused by shutdowns in traditional operations. With the continuous development of technology, the system optimization and innovation of pressure-bearing hole opening equipment have become the focus of the industry. This article will deeply explore the system composition and performance optimization strategies of pressure-bearing hole opening equipment. 01 System Composition and Working Principle The pressure-bearing hole-making equipment is a high-tech device specifically designed for performing hole-making operations on pressure pipelines. It consists of multiple systems that work together to complete the pipeline hole-making task without interrupting production. A complete pressure-bearing hole-opening equipment usually consists of core components such as the transmission system, feed device, tool section, sealing system and control unit. When the equipment is operating, the power is transmitted to the tool part through the transmission system. The feed device ensures that the tool makes a smooth contact with the pipeline surface. Under the guarantee of the sealing system, safe cutting can be achieved in a pressured environment. Pressure-bearing hole-opening equipment can be classified into various types based on the driving method, including hydraulic drive, electric drive, and manual operation. Hydraulic drive equipment features high output force and smooth operation, and is commonly used in industries such as urban gas pipelines. The electric hole-making machine adopts a design of integrating motor and reducer, which has a compact structure, good rigidity, stable hole-making performance, and is easy to use. Optimization of Transmission and Feed Systems The transmission and feed system is the core power component of the pressure-assisted hole-making equipment. Its performance directly affects the efficiency and quality of the hole-making operation. Traditional hole-making equipment often relies on manual experience for feed control, which can easily lead to uneven feed, rapid tool wear, and other problems. The application of the new threaded propulsion mechanism has significantly improved the feed accuracy. The threaded propulsion pressure-resistant hole-opening tool developed by China National Petroleum Corporation achieves the advancement of the hole-opening tool by rotating the feed control sleeve and the main body of the hole-opening device through a threaded connection. This design eliminates the shaking and skewing caused by manual operation, reduces the damage rate of the drill bit, and improves the efficiency of the operators. The automation transformation of the hydraulic system is another important optimization direction. By automating the existing hydraulic drive equipment, the operation process can be automatically controlled, reducing the need for manual intervention. The automated system can precisely control the feed speed and cutting parameters, ensuring the consistency of the hole opening quality, while reducing the reliance on the operator's experience. In the high-speed and high-pressure hole-making machine, the redundant design of the balance system significantly enhances the operational reliability. The new hole-making machine is equipped with two sets of high-pressure balancing devices. Even if one set of the balance system fails, it can promptly switch to the other system to ensure the high reliability of the hole-making process. This redundant design is particularly important in high-risk operations such as those involving high-pressure oil and gas pipelines. 03 Tool Design and Enhancement of Cutting Performance The cutting tool is the part that directly performs the cutting task, and its performance determines the efficiency and quality of the hole opening. Traditional hole opening tools often encounter problems such as rapid wear, unstable cutting, and poor hole quality when dealing with high-strength pipe materials. The design and application of the bimetallic thin-walled tubular cutting tool have brought about significant improvements. This tool features narrow opening cuts, high cutting efficiency, and low contamination of pipeline materials. Its unique structural design reduces resistance during the cutting process, enhances cutting efficiency, and simultaneously lowers the risk of contamination of the fluid inside the pipeline. For the challenging issue of hole drilling in high-strength pipeline steel (such as X80 steel), the design of hard alloy materials and special tool angles plays a crucial role. By using high-strength hard alloy materials, combined with specially designed tool angles and toothed structures, the stability of hole drilling can be ensured, and welding of anti-expansion rings is not required. The application of the anti-inflation ring device effectively solves the problem of stuck knives. The main body of the anti-inflation ring is designed as an "arch-shaped bridge" structure that is resistant to deformation. Additional reinforcing plates and ribs are added to form a complete anti-inflation ring device. Welding anti-expansion rings at the opening position can effectively reduce the saddle-shaped plate deformation during the opening process and decrease the probability of knife jamming. 04 Innovation in Sealing Technology The sealing system is the guarantee for the safe operation of equipment with pressure openings. Especially in environments with high pressure and flammable or explosive media, the reliability of the seal directly affects the success or failure of the entire operation. The J-type reciprocating dynamic sealing system performs exceptionally well in the pressure-bearing opening device of the drill pipe. The researchers used the ABAQUS simulation analysis software to conduct a finite element analysis of the J-type reciprocating dynamic sealing system between the reciprocating cutting rod and the fixed cutting rod. The sealing performance was verified through experiments. This dynamic sealing design is capable of accommodating the reciprocating motion during the drilling process while maintaining a reliable sealing condition. In the operation of opening and sealing holes in high-pressure oil and gas pipelines, multiple layers of sealing rubber cups have replaced the traditional lip sealing method. This innovation has solved the problem of difficult sealing under both high and low pressure conditions of the pipeline, significantly improving the reliability of the sealing operation. By combining the Computational Fluid Dynamics (CFD) technology, the researchers optimized the structure of the sealing head and the rubber cup, further enhancing the sealing performance. The design of the debris removal device protects the seals from damage. Metal iron shavings generated during the opening process may scratch the sealing lip cup, causing the seal to fail. The specially developed debris removal device for this purpose can push the iron shavings away, preventing any damage to the lip cup. Compared with the traditional method of using old plastic bowls for sweeping, this specialized device can remove iron filings more effectively and protect the sealing components.