Pipeline Pig Launch Apparatus with Gravity-Driven Release
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Solution Overview
Problem
Existing pig launching apparatuses for pipeline cleaning and inspection lack reliability, particularly in remote locations, due to potential malfunctions and high labor and maintenance costs, which can lead to operational inefficiencies and safety risks.
Innovation Solution
A pig launching apparatus with a frame, guide rails, a drop tube, a drive system, and a lock mechanism that allows for automated and controlled movement of pigs along guide rails and into a drop tube for secure positioning and release into the pipeline, ensuring reliable and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated pig launching apparatus is used in remote locations, then operational efficiency is improved, but reliability deteriorates due to potential malfunctions and high maintenance costs
Solution Approach 1:
The drive system uses the weight of the pig itself as the driving force. As the pig moves along the guide rails under gravity, it automatically triggers the release mechanism through the cam and follower interaction, eliminating the need for external power sources or complex control systems that would require maintenance in remote locations
Solution Approach 2:
The invention extracts the pig's gravitational potential energy as the driving force, separating the launching function from complex mechanical drive systems. The pig's own weight and movement along the inclined guide rails provide the necessary force, simplifying the apparatus and improving reliability
2Ease of operation
If complex drive systems are used to move pigs, then launching control is improved, but device complexity increases leading to higher maintenance costs
Solution Approach 1:
The pig's movement along the guide rails automatically actuates the release mechanism through the cam-follower interaction. The system uses the pig's own kinetic energy and position to trigger the release, eliminating the need for external motors, sensors, or control systems
Solution Approach 2:
The cam mechanism dynamically converts the pig's linear motion along the guide rails into rotational motion of the release lever. This dynamic transformation provides precise control of the release timing based on the pig's position, achieving accurate launching control without complex mechanical drive systems
Data Source
AI summary
An in-line pig launching device includes a pair of guide rails on which a pig is stored before launching, a drive system for moving the pig along the guide rails and a drop tube at an end of the guide rails for accommodating the pig just before launching. The drop tube includes a guide rail extension that holds the pig in a proper orientation, against tipping, within the drop tube. The guide rail extension is linked to the drive system, such that only when the drive system moves to move a next pig will the guide rail extension release the pig from the drop tube.