Pipe Joint Packing Ring Cutout Groove Deformation
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Solution Overview
Problem
Conventional pipe joints cause pipe displacement and increased insertion resistance due to the compression of packing rings during assembly, leading to inefficiencies and potential sealing issues, and existing solutions either increase component complexity or hinder reusability.
Innovation Solution
A pipe joint design featuring a packing ring with a cutout groove that deforms upon pressing, preventing axial movement and using a slide piece to regulate pressing ring movement, allowing for efficient sealing without pipe displacement and enabling reusability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the packing ring is compressed while being moved in the pipe axis direction to create sealing, then sealing performance is improved, but the pipe is pulled and dislocated resulting in increased insertion resistance
Solution Approach 1:
The packing ring is divided into three functional sections: a seal section (52) for sealing, a base section (51) for positioning, and a connection section (53) connecting them. The seal section is specifically designed to be compressed radially inward by the pressing ring to contact the pipe outer peripheral surface, while the base section remains positioned in the containing section. This segmentation allows sealing to be achieved without axial movement of the entire packing ring, preventing pipe pull and dislocation.
2Productivity
If the packing ring minimum inside diameter is set larger than the pipe outside diameter to prevent pull, then piping efficiency is improved, but sealing cannot be achieved without compression
Solution Approach 1:
Different sections of the packing ring have different functional properties. The seal section (52) is designed with compressibility to deform radially inward under pressure from the pressing ring, creating sealing contact with the pipe. The base section (51) is designed to be positioned and held in the containing section (20) without axial compression. This local differentiation of properties allows the packing ring to provide sealing through localized radial compression while preventing axial pull through the positioned base section.
3Ease of operation
If the pressing ring is allowed to move freely toward the pipe joint body during tightening, then assembly is simplified, but the packing ring may be accidentally compressed during conveyance affecting sealing performance
Solution Approach 1:
The packing ring (5) is pre-installed in the containing section (20) of the pipe joint body (2) before the pressing ring (4) is mounted. The base section (51) of the packing ring is positioned in the containing section with its front end facing the opening, establishing the initial position. This preliminary action ensures that when the pressing ring is later tightened, the packing ring is already in place and will be compressed radially rather than axially moved, preventing accidental compression during conveyance while simplifying assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design prevents pipe displacement during assembly, enhances sealing performance, reduces component complexity, and allows for the pipe joint to be reused after disassembly.
Implementation Method 1
the seal section is bent into the cutout groove and is deformed, and compression caused by the deformation creates a sealed state
Data Source
AI summary
A pipe joint is provided with a pressing ring, a pipe or a pipe joint body having a containing section, a tightening element, and a packing ring compressed by being pressed by the pressing ring moved by the operation of the tightening element. The packing ring includes a base section fitted and mounted in the containing section at a rear thereof, a seal section contained within the containing section at a front thereof, and a connection section which connects the base section and the seal section and has a cutout groove. When the packing ring positioned by fitting and mounting the base section in the containing section at the rear thereof is subjected to pressing by the pressing ring, the seal section is bent into the cutout groove and is deformed, and compression caused by the deformation creates a sealed state.