Pipe Joint Stop Piece Locking Against Torque-Induced Rotation
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Solution Overview
Problem
Existing pipe systems experience rotational issues due to applied torque, leading to power cable disconnection or breakage, particularly in drop pipe systems where pumps exert rotational forces, causing the power cable to wrap around the pipe and disconnect or split.
Innovation Solution
An anti-rotation apparatus for pipe joints featuring a stop piece with a body and locking parts that prevent relative rotation by aligning and engaging with locking receptacles in the joint parts, ensuring the pipes remain fixed in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pipe joints allow rotation among components, then ease of installation and flexibility are improved, but reliability deteriorates due to power cable wrapping and disconnection
Solution Approach 1:
The anti-rotation apparatus is pre-installed on pipe sections before assembly, featuring protrusions that will engage with recesses in adjacent joints. This preliminary preparation ensures that when pipes are connected, rotation is automatically prevented without complicating the installation process
Solution Approach 2:
The anti-rotation apparatus acts as an intermediary component between pipe sections and power cables. By providing a mechanical interface (protrusions and recesses) that prevents rotation, it protects the power cable from wrapping and disconnection while maintaining the separable joint design
2Reliability
If anti-rotation apparatus is added to pipe joints, then reliability is improved by preventing rotation, but device complexity increases
Solution Approach 1:
The anti-rotation function is segmented into discrete, modular components: protrusions on one pipe section and corresponding recesses on adjacent sections. This segmentation allows the anti-rotation feature to be added as a separate element rather than redesigning the entire joint system
Solution Approach 2:
The anti-rotation apparatus is implemented locally at specific points on pipe sections rather than requiring a complete redesign of the entire pipe system. The protrusions and recesses are placed only where needed to prevent rotation, maintaining simplicity in other areas
Data Source
AI summary
An anti-rotation apparatus for a pipe joint includes: a stop piece having a body with a retaining portion and a locking part; a first joint part and a second joint part coupled to one another and having an axis in a lengthwise direction of the pipe joint; a locking receptacle provided in the first joint part; and a receiving receptacle provided in the second joint part. The retaining portion of the body of the stop piece is disposed in the receiving receptacle of the second joint part and the locking part protrudes in a radial direction relative to the axis. When the locking part and the locking receptacle are axially and rotationally aligned, and when the locking part is disposed in the locking receptacle of the first joint part, relative rotation about the axis between the first joint part and the second joint part is prevented.