Push-Pull Water Valve to Prevent Calcified Stem Seizure
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Solution Overview
Problem
Gate valves with metal components are prone to calcification due to calcium minerals in water, making them difficult to operate, especially for individuals with limited strength or without tools.
Innovation Solution
A push-pull water valve design that eliminates the need for a stem or handle, using a stopper within a body that can be pushed inward to block or pulled outward to allow water flow, connected to a handle for easy operation, reducing the impact of calcification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional gate valve with handwheel and stem is used, then water flow can be controlled effectively, but calcification of metal components makes operation difficult especially for individuals with limited strength
Solution Approach 1:
The patent extracts and eliminates the stem component from the traditional gate valve design. By removing the stem that connects the handwheel to the gate, the invention prevents calcification from affecting the operational mechanism, as calcium deposits cannot form in the same way on the simplified push-pull rod design. This extraction of the problematic stem component directly addresses the ease of operation issue while maintaining valve control functionality.
Solution Approach 2:
The patent inverts the traditional rotational operation (handwheel turning) into a linear push-pull motion. Instead of rotating a handwheel to move the gate, the user simply pushes or pulls the handle directly along the axis of the valve body. This inversion of the operational mechanism eliminates the need for rotational torque and complex stem threading, making operation accessible to individuals with limited strength while preventing calcification interference.
2Reliability
If a stem and handwheel mechanism is used, then valve control is achieved, but calcification accumulates on metal surfaces making the valve difficult to operate
Solution Approach 1:
The patent extracts and eliminates the stem component from the traditional gate valve design. By removing the stem that connects the handwheel to the gate, the invention prevents calcification from affecting the operational mechanism, as calcium deposits cannot form in the same way on the simplified push-pull rod design. This extraction of the problematic stem component directly addresses the ease of operation issue while maintaining valve control functionality.
3Ease of operation
If individuals with limited strength need to operate the valve, then specialized tools or excessive force would be required, but this creates accessibility issues and potential damage risk
Solution Approach 1:
The patent inverts the traditional rotational operation (handwheel turning) into a linear push-pull motion. Instead of rotating a handwheel to move the gate, the user simply pushes or pulls the handle directly along the axis of the valve body. This inversion of the operational mechanism eliminates the need for rotational torque and complex stem threading, making operation accessible to individuals with limited strength while preventing calcification interference.
Solution Approach 2:
The patent incorporates a spring mechanism that provides mechanical assistance during valve operation. The spring acts as a counterweight or assisting force that reduces the effort required by the user to move the gate. When the user pushes or pulls the handle, the spring either assists the motion or returns the valve to its original position, effectively compensating for limited user strength and eliminating the need for specialized tools.
Data Source
AI summary
A water valve that does not include a stem or handwheel that can calcify and become hard to operate. The valve includes a stopper within a body running perpendicular to the flow of water that can be pushed inward to stop the flow of water or pulled outward to allow the flow of water. The stopper is connected to a handle that a user can push or pull depending on the action to be taken. The use of the stopper and handle in a push/pull arrangement provides an easy manner of operation as it does not require any turning of a handwheel or the like.