Screw-Coupled Telescopic Pipe for Heavy-Load Extension Stability
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Solution Overview
Problem
Conventional telescopic pipes fail to safely extend and retract mechanical elements of high weight, such as fire engine ladders or crane booms, especially under heavy loads and adverse weather conditions, due to inadequate structural integrity and durability.
Innovation Solution
A telescopic pipe design featuring a base pipe with a rotating inner pipe, a connecting pipe that transfers rotational force, and a finishing pipe with interlocking mechanisms, allowing for staged extension and retraction through screw-coupling, ensuring secure operation even at high places.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional telescopic pipe structure is used, then the device complexity is low, but the strength and reliability are insufficient for high weight mechanical elements
Solution Approach 1:
The telescopic pipe is divided into multiple pipe sections (first pipe section, second pipe section, third pipe section) that can be independently extended and retracted. Each section has its own coupling mechanism, allowing the system to handle high weights by distributing structural loads across segmented components rather than relying on a single complex structure.
Solution Approach 2:
The pipe sections are nested within each other, with the second pipe section inserted into the first, and the third pipe section inserted into the second. This nesting arrangement provides structural strength for high weight applications while maintaining a compact form when retracted, avoiding the need for a more complex external support structure.
2Reliability
If screw-coupling mechanisms are added for staged extension, then the reliability improves, but the device complexity increases
Solution Approach 1:
The coupling mechanisms are pre-configured with coupling holes and coupling protrusions that align automatically during extension. The screw threads are pre-formed on the pipe sections, so when sections are brought together, the coupling protrusions engage with coupling holes and the screw threads automatically begin to engage, requiring minimal additional action to secure the connection. This preliminary preparation ensures reliable connection without requiring complex real-time adjustment mechanisms.
Solution Approach 2:
The screw-coupling mechanism is designed to be self-securing through the interaction of coupling protrusions and coupling holes. When pipe sections are extended and brought into contact, the coupling protrusions automatically align with and engage the coupling holes, and the screw threads self-thread together through rotational force applied to extend the pipe. The mechanism uses its own structural features (protrusions, holes, threads) to create the secure connection without requiring external fastening devices or complex control systems.
3Stability of the object's composition
If multiple pipe sections are used for staged extension, then the manufacturing precision requirements increase, but the strength and stability improve
Solution Approach 1:
The coupling mechanism uses asymmetric features: coupling protrusions that extend from one pipe section engage with coupling holes in the adjacent section in a specific directional manner. The screw threads have a defined helical direction and pitch. This asymmetric design ensures that components can only be assembled in the correct orientation and sequence, guiding the assembly process and ensuring proper alignment without requiring extremely tight manufacturing tolerances on all dimensions.
Solution Approach 2:
The coupling holes and coupling protrusions are pre-positioned on the pipe sections during manufacturing. The screw threads are pre-formed with standard pitch and diameter specifications. This preliminary configuration of critical coupling features allows for modular assembly where each section can be manufactured to standard tolerances, and the pre-positioned coupling features ensure proper alignment when sections are assembled together, reducing the cumulative precision requirements compared to requiring all interfaces to be precisely matched.
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 telescopic pipe effectively extends and retracts mechanical elements of high weight safely by using screw-coupling mechanisms, providing stability and security even under heavy loads and adverse conditions, while allowing for precise control and accurate extension/retraction of mechanical elements.
Implementation Method 1
a base inner pipe which has a first male screw and is rotated by external driving power, and a base outer pipe which has a first female screw to be screw-coupled to the first male screw and is extendable according to the rotation of the base inner pipe
Implementation Method 2
a connecting inner pipe that is coupled to the base inner pipe to be extendable in order to transfer rotational force
Data Source
AI summary
A telescopic pipe includes a base pipe having a base inner pipe rotated by external force, and a base outer pipe arranged to receive the base inner pipe; a connecting pipe having a connecting inner pipe coupled to the base inner pipe to be extendable to transfer rotational force, and a connecting outer pipe screw-coupled to the inner circumferential surface of the base outer pipe to be extendable; and a finishing pipe including a finishing inner pipe coupled to the connecting inner pipe to be extendable and to be rotated, and a finishing outer pipe that is interlocked by means of rotation of the finishing inner pipe and is screw-coupled to the inner circumferential surface of the connecting outer-pipe to be extendable, wherein the connecting outer pipe is interlocked by the rotational force of the extended finishing outer pipe and thus is extended and retracted along the base outer pipe.