Linear Freewheel Mechanism for Pipe Insertion Positioning
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Solution Overview
Problem
Operators face difficulties in inserting objects into pipelines due to the risk of the positioning device being pushed back by pressurized fluid, requiring constant manual control to maintain the insertion direction.
Innovation Solution
A device with a guide and a linear freewheel mechanism that locks in the opposite direction of insertion, allowing the operator to release the positioning device without fear of kickback, and includes a freewheel with an actuable release device for reverse movement and a locking mechanism for fixing the object in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the positioning device is inserted into the pipeline against pressurized fluid, then the object can be introduced into the pipeline, but the positioning device may be pushed back by the fluid pressure requiring constant manual control
Solution Approach 1:
A linear freewheel mechanism is introduced as an intermediary between the positioning device and the pipeline. This freewheel allows the positioning device to move in the insertion direction while preventing movement in the opposite direction caused by fluid pressure, thereby eliminating the need for constant manual control and ensuring position stability.
Solution Approach 2:
The freewheel mechanism inverts the directional control: it permits movement in one direction (insertion) while blocking movement in the opposite direction (withdrawal due to pressure). This asymmetric mechanical behavior resolves the contradiction by allowing easy insertion while preventing unwanted backward movement.
2Reliability
If the positioning device is held against fluid pressure during insertion, then the device position can be controlled, but the operation becomes laborious and difficult
Solution Approach 1:
The linear freewheel acts as a mechanical intermediary that automatically maintains position control without requiring continuous operator intervention. The freewheel's one-way locking mechanism provides reliable position control while eliminating the laborious manual holding action.
Solution Approach 2:
The freewheel mechanism is self-regulating and automatically responds to fluid pressure forces by locking in the appropriate direction. This self-service behavior eliminates the need for operator effort to counteract pressure, making the operation easy while maintaining reliable position control.
3Reliability
If a locking device is added to prevent backflow, then the positioning device can be secured, but the device complexity increases
Solution Approach 1:
The linear freewheel serves as a compact intermediary component that provides locking functionality without significantly increasing overall device complexity. By integrating the freewheel into the existing positioning mechanism, reliable position stability is achieved with minimal additional structural 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
Enables safe and controlled insertion and removal of objects from the pipeline without manual force, ensuring the object is securely positioned and can be easily retrieved for maintenance, while preventing backflow and ensuring precise placement.
Implementation Method 1
a linear freewheel, wherein the positioning device is connected to the pipeline via the interposition of the linear freewheel, which assumes its locked state when the positioning device is moved against the insertion direction
Implementation Method 2
the freewheel includes a clamping mechanism that is or can be actuated by moving the positioning device
Data Source
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AI summary
The invention relates to a device for introducing an object into a pipe, comprising a guide (3) that is securely fixed to the pipe (2) or is formed by the latter and a positioning unit (4) that is movably guided on the pipe (2) in an introduction direction (5) by means of the guide (3) and that carries the object (14) or forms said object. The object can be introduced into the pipe (2) by moving the positioning device (4) in the introduction direction (5), said positioning device (4) being connected to the pipe (2) with the interconnection of a linear one-way clutch (9) which adopts a blocked state when the positioning device (4) is moved against the introduction direction (5).