Stepped Pipe Joint Sealing Ring for No-Chamfer Installation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current sealing technologies for pipe joints in the pipeline industry are cumbersome, time-consuming, and costly due to the need for chamfering and rounding of pipe ends, which can lead to poor sealing performance and leakage when not done correctly, especially with 0-shaped rings.
Innovation Solution
A sealing structure comprising an inner pipe, an outer pipe, and a sealing ring with a stepped sealing groove system that allows for smooth insertion and compression without pre-chamfering, featuring a lip and main body design that ensures effective sealing through compressive deformation, and includes a guide surface for easy insertion and protection against ring displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 0-shaped rings are used to seal pipe joints, then sealing performance can be achieved, but the installation process becomes complex and time-consuming due to the need for chamfering and rounding of pipe ends
Solution Approach 1:
The sealing ring is segmented into two functional parts: a lip portion that contacts the pipe outer surface and a main body portion that contacts the inner pipe. This segmentation allows each part to perform its specific sealing function independently, eliminating the need for complex pipe end preparation while maintaining reliable sealing.
Solution Approach 2:
Different portions of the sealing ring have different geometric properties tailored to their specific functions. The lip has a thickness greater than the first sealing groove depth for outer surface sealing, while the main body has a thickness less than or equal to the second sealing groove depth for inner surface sealing. This local differentiation enables simple pipe insertion without chamfering while ensuring reliable sealing at both interfaces.
2Reliability
If chamfering and rounding of pipe ends are performed, then sealing performance can be ensured, but the installation process becomes cumbersome and costly
Solution Approach 1:
The invention extracts the chamfering and rounding operations from the pipe preparation process and transfers them to the sealing ring design itself. The specially designed lip and main body geometry performs the sealing function that would otherwise require modified pipe ends, thereby simplifying the overall installation process while maintaining sealing reliability.
Solution Approach 2:
The sealing ring is pre-designed with the lip and main body dimensions that anticipate the sealing requirements. The lip thickness is predetermined to be greater than the first sealing groove depth, and the main body thickness is predetermined to be less than or equal to the second sealing groove depth. This preliminary design eliminates the need for on-site pipe end modification while ensuring proper sealing contact.
3Productivity
If pipe ends are not properly chamfered, then installation is faster, but sealing performance fails and leakage occurs
Solution Approach 1:
The sealing ring performs self-adjustment during installation. As the pipe is inserted, the lip and main body portions are compressed between the pipe outer surface and the inner pipe, automatically forming the sealing contact surfaces. This self-service mechanism ensures reliable sealing without requiring external chamfering operations, thereby maintaining both installation speed and sealing reliability.
Solution Approach 2:
The sealing ring utilizes parameter changes during compression. When the pipe is inserted, the lip thickness (initially greater than first sealing groove depth) and main body thickness (initially less than or equal to second sealing groove depth) are compressed to create optimal sealing contact. This dynamic parameter adjustment ensures reliable sealing performance regardless of pipe end geometry, maintaining both installation speed and sealing reliability.
4Device complexity
If a single sealing groove is used, then the structure is simpler, but the sealing ring cannot be properly positioned and sealed against high pressure
Solution Approach 1:
The sealing groove is segmented into two stepped portions: a first sealing groove for the lip portion and a second sealing groove for the main body portion. This segmentation provides distinct positioning zones for each sealing surface, enabling the sealing ring to maintain proper orientation and contact under high pressure while adding minimal structural complexity.
Solution Approach 2:
The sealing groove structure transitions from a single-depth groove to a two-level stepped groove configuration. The first sealing groove is positioned at a greater radial depth than the second sealing groove, creating a stepped arrangement that accommodates both the lip and main body sealing surfaces. This dimensional differentiation ensures proper positioning and sealing performance under pressure with minimal added complexity.
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
This solution simplifies the installation process, reduces costs, and ensures a reliable, leak-proof seal by allowing the pipe to be smoothly inserted without pre-chamfering, maintaining sealing performance even under high-pressure conditions.
Implementation Method 1
the sealing ring is squeezed, and has a first sealing surface in contact with a bottom surface of the first sealing groove and a second sealing surface in contact with an inner wall of the pipe
Implementation Method 2
the sealing ring is made of an elastic material
Data Source
AI summary
A sealing structure includes an inner pipe, an outer pipe, and a sealing ring, where the outer pipe is detachably sleeved on the inner pipe, a slot for inserting a pipe is formed between an inner wall of the outer pipe and an outer wall of the inner pipe, and the outer wall of the inner pipe is provided with a sealing groove for placing the sealing ring; the sealing ring includes a main body provided with a lip; the sealing groove includes a first sealing groove and a second sealing groove, the first sealing groove and the second sealing groove are stepped; the bottom of the lip fits the bottom of the first sealing groove; and the bottom of the main body fits the bottom of the second sealing groove.