Manhole Adjustment Ring Removal Assembly
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Solution Overview
Problem
Existing devices are inadequate for efficiently removing adjustment rings from manhole apertures, as they lack a mechanism to effectively dislodge the rings from the cone base without causing damage.
Innovation Solution
A manhole adjustment ring removal device comprising a frame with pivotally coupled legs and tapering plates, a drive assembly for prying the adjustment ring from the cone base, and a lift mechanism to elevate the ring once dislodged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing devices are used to remove adjustment rings, then the removal process can be initiated, but the devices lack an effective mechanism to dislodge the rings from the cone base without causing damage
Solution Approach 1:
The device is divided into functional segments: a frame structure, pivotally coupled legs for positioning, tapering plates for prying, a drive assembly for mechanical actuation, and a lift ring for elevation. Each segment performs a specific function in the ring removal process, enabling safe and effective removal through coordinated action.
Solution Approach 2:
The tapering plates act as intermediaries between the drive assembly and the adjustment ring. These plates are positioned between the ring and cone base, allowing the drive assembly to apply controlled prying force without directly contacting the ring, thereby preventing damage while achieving effective dislodgement.
2Productivity
If a drive assembly is used to pry the adjustment ring from the cone base, then the ring can be dislodged, but the device complexity increases
Solution Approach 1:
The legs are pivotally coupled to the frame, allowing dynamic adjustment of their position and angle. This dynamic capability enables the tapering plates to be positioned optimally under the adjustment ring and provides mechanical advantage during the prying action, improving productivity without requiring a complex fixed mechanism.
Solution Approach 2:
The device utilizes multi-dimensional motion through the pivotally coupled legs and tapering plates. The legs can rotate and position themselves in three-dimensional space, allowing the plates to engage with the adjustment ring from optimal angles and provide prying force through a combination of linear and rotational movements, thereby achieving effective removal with a relatively simple mechanism.
3Reliability
If tapering plates are used to pry between the adjustment ring and cone base, then the ring can be dislodged without damage, but the device structure becomes more complex
Solution Approach 1:
The plates are specifically designed with a tapering geometry that provides localized prying action. The tapered shape concentrates the prying force at a specific interface between the adjustment ring and cone base, enabling damage-free dislodgement. This localized geometric feature achieves the desired function without requiring complex structural elements throughout the entire device.
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 efficiently dislodges adjustment rings from cone bases without damage, allowing for safe and effective removal by mechanically prying and lifting the ring away from the manhole cover.
Implementation Method 1
The drive assembly is actuated in a first direction moving the lower ends away from each other
Implementation Method 2
A pair of legs is pivotally coupled to and extends downwardly from the frame
Implementation Method 3
A lift ring is attached to the frame to be engaged with a cable to lift the frame when the plates are positioned under the adjustment ring
Data Source
AI summary
A manhole adjustment ring removal assembly includes a frame. A pair of legs is pivotally coupled to the frame. Each of the legs has an upper end and a lower end and each end has one of a pair of thee plates attached thereto. The plates each have an outer edge extending outwardly away from a corresponding one of the legs. The outer edges taper to point and are extendable between an adjustment ring and a cone base. A drive assembly is mounted on the frame and is mechanically coupled to the legs. The drive assembly is actuated in a first direction moving the lower ends away from each other and in a second direction moving the lower ends toward each other. A lift ring is attached to the frame to be engaged with a cable to lift the frame when the plates are positioned under the adjustment ring.