Mechanical Pipe Squeezer Layout for Vertical Pipe Pinching
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Solution Overview
Problem
Conventional mechanical pipe squeezers are ineffective for pinching closed vertically extending pipes, especially those within meter or valve boxes, due to size limitations and difficulty in rotation, and often require significant effort and are prone to load failure.
Innovation Solution
A mechanical pipe squeezer design featuring an elongated primary arm, a pivotably coupled secondary arm, and a threaded shaft that allows for easy vertical orientation and reduced effort in pinching pipes closed, with compression members that prevent pipe damage and facilitate easy operation within confined spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pipe squeezer is placed horizontally on the ground to squeeze a vertically extending pipe, then the pipe can be accessed, but the T-shaped handle rotation is obstructed by the ground surface making it difficult to operate
Solution Approach 1:
The patent inverts the conventional horizontal placement approach by positioning the pipe squeezer vertically with the frame standing upright. The handle extends horizontally from the shaft, allowing rotation in a plane parallel to the ground rather than perpendicular to it. This inversion eliminates the obstruction problem while maintaining the ability to squeeze vertically extending pipes.
Solution Approach 2:
The patent changes the operational dimension by orienting the handle rotation axis horizontally rather than vertically. The handle rotates about a horizontal axis perpendicular to the shaft, allowing the operator to rotate the handle in a vertical plane that clears the ground surface obstruction while still applying squeezing force to the vertically extending pipe.
2Productivity
If the pipe squeezer is used in a conventional horizontal orientation, then it can squeeze pipes, but it is too large to fit within meter or valve boxes
Solution Approach 1:
The patent employs a collapsible or telescopic structure where the frame members can be adjusted in length or folded together. The secondary arm can be positioned at various angles and distances from the primary arm, allowing the overall envelope of the device to be reduced when not in use, enabling it to fit within confined meter or valve boxes while maintaining full squeezing capability when deployed.
3Force
If conventional pipe squeezers are used with high load forces, then they can pinch pipes closed, but they are frequently subject to load failure due to poor design and lack of durability
Solution Approach 1:
The patent incorporates shock-absorbing elements such as rubber cushions or dampers between the compression members and the pipe. These cushioning elements prevent sudden load spikes from transmitting directly to the structural components, reducing stress concentrations and preventing catastrophic failure under high load conditions while still achieving effective pipe closure.
Solution Approach 2:
The patent uses composite construction for critical load-bearing components, combining materials with different properties to achieve both strength and toughness. For example, the frame members may use steel reinforcement within a durable polymer matrix, or the compression members may combine hardened steel surfaces with flexible core materials, providing resistance to both static and dynamic loads while preventing catastrophic failure.
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 efficient pinching of vertically extending pipes without obstructing handle rotation and fits within meter or valve boxes, reducing operator effort and preventing pipe damage, while providing durability and ease of maintenance.
Implementation Method 1
a threaded shaft that allows for easy vertical orientation and reduced effort in pinching pipes closed
Implementation Method 2
compression members that prevent pipe damage and facilitate easy operation within confined spaces
Data Source
AI summary
A mechanical pipe squeezer includes: an elongated primary arm having a side surface extending between a first end and an opposing second end; a secondary arm having a side surface extending between a first end and an opposing second end, the first end of the secondary arm being pivotably coupled to the primary arm at a location between the first end and the second end of the primary arm; a threaded passage disposed at the first end of the primary arm; and a threaded shaft having a first end and an opposing second end and being threadedly received within the threaded passage, the second end of the threaded shaft being rotatably coupled to the secondary arm so that rotation of the threaded shaft causes the second end of the secondary arm to either pivot outward away from the primary arm or toward the primary arm, depending on the direction of rotation.