Valve Rod Guide Ring Assembly to Prevent Clamping Stagnation
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Solution Overview
Problem
Existing valve structures suffer from clamping stagnation of the valve rod due to unbalanced torque exerted on the valve core, leading to deformation and extrusion between the valve rod and valve cover, which is not adequately addressed by current designs.
Innovation Solution
An assembly comprising a rigid ring and an elastic ring is used to guide the valve rod's movement, creating a gap between the valve rod and valve cover, and incorporating a sealing mechanism to prevent deformation and ensure smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve core structure is used with unbalanced force application, then the valve can perform opening and closing functions, but the valve rod experiences clamping stagnation and deformation
Solution Approach 1:
The patent introduces a guide sleeve as an intermediary component between the valve rod and the valve cover. The guide sleeve has a circular cross-section that guides the valve rod, preventing it from contacting the valve cover directly. This intermediary structure eliminates the clamping stagnation problem while maintaining the valve's opening and closing function.
2Device complexity
If the valve rod closely matches the valve cover, then structural simplicity is achieved, but extrusion force causes bending and deformation
Solution Approach 1:
The patent segments the valve rod structure by introducing a guide sleeve with a circular cross-section. This segmentation separates the guiding function from the valve rod itself, allowing the valve rod to move freely without extrusion while maintaining overall structural simplicity.
3Ease of operation
If the valve rod moves freely without guidance, then ease of operation is improved, but unbalanced torque causes deflection and extrusion
Solution Approach 1:
The guide sleeve acts as a mediator that provides circular guidance for the valve rod. This circular guidance allows the valve rod to move smoothly without deflection caused by unbalanced torque, while the guide sleeve prevents direct contact with the valve cover that would cause extrusion.
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 assembly prevents clamping stagnation by allowing the valve rod to move vertically while maintaining sealing, thereby avoiding deformation and ensuring normal operation of the valve.
Implementation Method 1
an elastic ring and a rigid ring are provided. The rigid ring is sleeved on the outer wall of the valve rod... The elastic ring is sleeved on the outer wall of the rigid ring... the elastic ring buffers the valve rod
Data Source
AI summary
Disclosed are an assembly for preventing clamping stagnation of a valve rod, and a valve structure and method for preventing clamping stagnation of a valve rod. The assembly for preventing clamping stagnation of a valve rod includes a rigid ring and an elastic ring. The rigid ring is coaxially sleeved in the elastic ring, and the inner wall of the rigid ring is of a straight cylindrical structure. A valve rod can move up and down along the inner wall of the rigid ring under the guidance of the rigid ring and forms a sliding pair together with the rigid ring. The joint between the rigid ring and the valve rod is closed. The assembly for preventing clamping stagnation of a valve rod is simple in structure, convenient to manufacture, and suitable for most valves having elongated valve rod structures.