Plastic Drain Pipe Screw Thread Sealing Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing plastic sewage pipe systems face challenges with sealing and assembly due to limited compression of seals, leading to leaks and difficulties in connecting and disconnecting pipes, especially in pressurized systems and areas requiring frequent assembly and disassembly.
Innovation Solution
A plastic pipe system with a socket end featuring a screw thread and a screw ring that compresses an elastic ring seal, allowing for easy assembly and disassembly without chamfers, and providing enhanced sealing and resistance to dirt and water ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ring seal is used in a bead for connecting pipes, then the sealing function is provided, but the seal cannot be compressed sufficiently leading to leaks and limited use in pressurized systems
Solution Approach 1:
The patent transforms the static seal compression mechanism into a dynamic one by introducing a screw ring that can be rotated to progressively compress the ring seal. This allows the sealing force to be adjusted and increased as needed, rather than being fixed at the initial installation stage.
Solution Approach 2:
The patent changes the compression parameter of the ring seal from a fixed value determined by initial installation to a variable parameter that can be adjusted by rotating the screw ring. This enables sufficient compression force to be applied even in pressurized systems where higher sealing forces are required.
2Ease of operation
If pipes are connected using a bead and ring seal system, then the connection is formed, but assembly and disassembly become difficult especially after long-term use
Solution Approach 1:
The screw ring mechanism provides a dynamic connection system where the same component that ensures stable sealing through compression also enables easy disassembly by simply rotating the screw ring to release the seal, without requiring special tools or complex procedures.
Solution Approach 2:
The screw ring serves dual functions: it maintains the sealing compression during service and enables easy disassembly when needed. The system is self-sufficient, requiring no additional mechanisms for installation or removal.
3Ease of operation
If the spigot end is inserted into the socket without sufficient seal compression, then insertion is easy, but leaks occur and the line cross-section is narrowed
Solution Approach 1:
The ring seal is pre-installed in the bead during manufacturing, positioned and oriented correctly before the pipe connection is made. This preliminary action ensures the seal is ready to be compressed uniformly when the screw ring is tightened, preventing misalignment issues during insertion.
Solution Approach 2:
The dynamic compression mechanism allows the seal to be compressed to the appropriate degree after insertion, ensuring both ease of insertion and reliable sealing without requiring excessive initial compression force.
4Manufacturing precision
If a test assembly is performed to check connections, then proper fittings can be selected, but the process is time-consuming and errors may be missed
Solution Approach 1:
The screw ring mechanism with its clear rotational operation and visible compression effect provides immediate feedback during assembly, allowing operators to verify proper connection and sealing without requiring separate test procedures. The self-evident nature of the tightened connection reduces the need for additional testing steps.
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 system ensures reliable sealing and easy connection/disconnection of pipes, preventing leaks and root growth, while maintaining sealing integrity even under high pressures and in challenging installation conditions.
Implementation Method 1
an elastic ring seal which is inserted into the ring bead
Implementation Method 2
the front edge of the radially inner ring part compresses a ring seal inserted in the ring bead
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
The invention relates to a pipe, in particular a plastic pipe for wastewater pipes, which has at least one socket end, which is provided with an annular groove (4) and a socket neck (3) and forms a first pipe (1), into whose socket end the spiky end of a second pipe or fitting (13) can be inserted and removed, and in which an elastic ring seal (6) is inserted into the annular groove (4).According to the invention, the socket neck (3) of the pipe is provided with a screw thread (9) onto which a screw ring (8) can be screwed, which contains an inner ring part (10) and an outer ring part (11) between which an annular gap is formed, and the ring parts (10, 11) are connected via an annular base (12) facing away from the ring groove (4), wherein the front edge (14) of the inner ring part (10) when the screw ring (8) is screwed onto the screw thread (9) compresses the ring seal (6) inserted into the ring groove (4) and locks the spigot end of the second pipe or fitting (13) in the first pipe (1).