Spectacle Blind Swinging Device Manual Rotation
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Solution Overview
Problem
Large, heavy spectacle blinds in piping systems are difficult to reposition between open and closed positions without the use of a crane, necessitating a portable and manually-operated device for efficient rotation.
Innovation Solution
A swinging device with anti-friction bearings and gear mechanisms allows for manual rotation of spectacle blinds, featuring a drive handle assembly and a base assembly with a bolted clamp for secure mounting to the pipe, enabling the spectacle blind to be swung between positions without a crane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a crane is used to rotate large, heavy spectacle blinds, then the spectacle blind can be repositioned between open and closed positions, but the equipment complexity and cost increase significantly
Solution Approach 1:
The device segments the heavy spectacle blind rotation task into manageable components: a portable swing mechanism with gears, shafts, and handles that can be manually operated. The spectacle blind itself is segmented into two discs (solid and open) joined by a web, allowing it to function as a pivotable component rather than a monolithic heavy object requiring crane assistance.
Solution Approach 2:
The patent introduces an intermediary mechanical device positioned between the worker and the heavy spectacle blind. This device includes a swing mechanism with gears mounted on shafts, connected to the spectacle blind through a pivot point. The intermediary mechanism translates small manual rotations into the large-scale movement of the heavy blind, eliminating the need for crane equipment.
2Area of moving object
If the spectacle blind is made larger to accommodate bigger piping systems, then it can handle larger diameter pipes, but its weight increases to hundreds or thousands of pounds
Solution Approach 1:
The device employs mechanical advantage through gear mechanisms to counteract the weight of large spectacle blinds. The swing mechanism includes gears with different sizes that create a mechanical advantage ratio, allowing a small manual force applied through handles to rotate the heavy blind. The gear train acts as a counterbalancing system that multiplies the operator's input force to match the weight and inertia of the large spectacle blind.
Solution Approach 2:
The patent introduces dynamic elements to the system, including anti-friction bearings mounted on shafts to reduce rotational resistance. The swing mechanism allows the spectacle blind to rotate smoothly between open and closed positions through a controlled arc. The dynamic gear engagement and disengagement enable easy repositioning of the heavy blind without requiring continuous high force, making the system adaptable to the weight and size variations of different spectacle blinds.
3Ease of operation
If flange bolts are removed to rotate the spectacle blind, then the blind can be repositioned, but the piping system becomes temporarily disconnected
Solution Approach 1:
The device performs preliminary action by establishing a secure pivot connection to the spectacle blind's web before any flange bolts are removed. The swing mechanism attaches to the blind through this pre-established connection point, ensuring the blind is securely held and can be rotated without requiring flange bolt removal. This preliminary securing action maintains piping system integrity throughout the rotation process.
Solution Approach 2:
The swing mechanism serves as an intermediary that transfers rotation force to the spectacle blind without requiring direct manipulation of the flange connection. By attaching to the blind's web through a pivot point and using gear mechanisms, the device rotates the blind while the flange bolts remain in place, maintaining the sealing and structural integrity of the piping connection throughout the operation.
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 device allows for the efficient and portable rotation of spectacle blinds of various sizes, including those over 10 inches in diameter, without the need for a crane, facilitating maintenance and operation at high elevations.
Implementation Method 1
The shafts are supported by anti-friction bearings for smooth rotation
Implementation Method 2
Each shaft has at least one gear mounted on it and the gear(s) on the second shaft engage the gear(s) on the first shaft
Data Source
AI summary
A swinging device for spectacle blinds where the swinging device includes a case having a pair of side members connected to a bottom member and first and second shafts rotatably connected to the case. A first gear mounted on the first shaft engages a second gear mounted on the second shaft. A drive handle assembly is connected to the first shaft to impart rotation of the first shaft. A spectacle blind holder is mounted on an end of the second shaft. The spectacle blind holder is arranged and designed to securely hold the spectacle blind. A base assembly has an upper portion connected to the case and a lower portion for mounting to piping.