Trapezoidal Thread Pipe Connection for High Axial Locking
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Solution Overview
Problem
Existing devices for connecting pressure/discharge tubes to plant walls fail to securely lock the connection, especially when high axial forces are applied, leading to potential disconnection and increased downtimes in processes like cement production and waste incineration.
Innovation Solution
A device utilizing a trapezoidal thread design for the pressure/discharge tube connection, which includes a coupling element with two trapezoidal threaded regions, ensuring high axial force absorption and 100% locking security through a locking body with a bayonet catch and trapezoidal threads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional connection devices are used for pressure/discharge tubes, then assembly is simple, but locking security is insufficient under high axial forces
Solution Approach 1:
The connection device is divided into distinct functional segments: a bayonet catch mechanism for initial engagement and positioning, and a trapezoidal thread mechanism for force absorption and locking. This segmentation allows each component to specialize in its function, with the bayonet catch providing quick alignment and the trapezoidal thread providing secure locking under axial loads, thereby achieving high reliability without excessive overall complexity.
Solution Approach 2:
The connection mechanism combines two different mechanical engagement principles: the bayonet catch (providing positional stability and alignment) and the trapezoidal thread (providing force absorption and locking). This composite approach integrates the advantages of both mechanisms - the quick engagement of bayonet-style connections with the high axial force resistance of trapezoidal threads - to achieve superior locking security.
2Force
If trapezoidal thread is used for connection, then axial force absorption is high, but assembly complexity increases
Solution Approach 1:
The trapezoidal thread geometry is specifically optimized with precise parameters (thread angle, pitch, and profile) to maximize axial force absorption efficiency. By carefully selecting and standardizing these geometric parameters, the thread structure achieves high force absorption capability while maintaining manufacturability and assembly feasibility, balancing performance with complexity.
3Reliability
If connection security is enhanced with locking mechanisms, then disconnection prevention improves, but assembly time increases
Solution Approach 1:
The bayonet catch mechanism performs preliminary engagement and positioning actions before the trapezoidal threading is fully engaged. This preliminary action aligns the components correctly and initiates the locking sequence, allowing the subsequent threading operation to proceed efficiently without requiring complex alignment procedures, thereby reducing overall assembly time while maintaining high connection security.
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 trapezoidal thread design effectively absorbs high axial forces, providing secure and reliable connections that prevent disconnection, thereby minimizing downtimes and ensuring efficient deposit removal in industrial processes.
Implementation Method 1
the thread design ensures that high axial forces are absorbed
Implementation Method 2
axial forces that have to be absorbed
Data Source
Figure 1
Figure 2
AI summary
A device (1) for the releasable connection of a pressure/discharge pipe (2) that is subjected to axial forces during use to a further piece of pipe (3) is intended to provide a solution by which such pressure gas pipes can not only be connected to the corresponding wall of the plant but can also be locked extremely securely, even when, for example, high axial forces are exerted on the pressure gas pipe. This is achieved by providing a heavy-duty external thread (6) on one pipe or piece of pipe (2) and a heavy-duty internal thread (6a) on the other pipe or piece of pipe.