Press Valve Core Structure for Preventing Biased Stem Wear
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Solution Overview
Problem
Conventional press type valve cores experience biased abrasion and wearing due to changes in water pressure and gravity, affecting the reliability of controlling the flow path, especially when the valve stem's axle center is not vertical.
Innovation Solution
The design incorporates supporting wings on the valve stem to maintain its axial center, coupled with a separator and springs to enhance motion stability and prevent intercommunication between cavities, ensuring reliable flow path control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve stem conducts reciprocating movement along the axial direction, then the valve core can control opening and closing of the flow path, but the valve stem may be subject to force away from the axle center due to water pressure changes or water hammer phenomenon, causing biased abrasion and wearing
Solution Approach 1:
The patent introduces guiding wings as an intermediary component between the valve stem and the cavity wall. These guiding wings guide the valve stem to move along a predetermined path, preventing direct contact between the valve stem and the cavity wall, thereby eliminating the source of biased abrasion and wearing while maintaining reliable flow path control
Solution Approach 2:
The patent provides a predetermined guiding path through the guiding wings before the valve stem can potentially deviate or contact the cavity wall. This pre-established guidance structure prevents harmful contact from occurring in the first place, cushioning against the effects of water pressure changes and water hammer phenomena
2Adaptability or versatility
If the axle center of the valve stem is horizontal or deviating from the vertical direction, then the valve core can be installed in various orientations, but gravity causes abrasion and wearing between the valve stem and the stem seat
Solution Approach 1:
The guiding wings act as an intermediary that supports and guides the valve stem, distributing the gravitational load and preventing direct contact between the valve stem and the stem seat. This allows the valve core to be installed in various orientations without causing abrasion and wearing
Solution Approach 2:
The patent introduces a new spatial dimension for support through the guiding wings, which provide guidance not only in the axial direction but also in the radial direction. This multi-dimensional guidance system allows the valve stem to maintain proper alignment regardless of installation orientation, eliminating gravity-induced wear
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
This design effectively prevents biased abrasion and wearing, maintaining the valve stem's axial center and enhancing the reliability of flow path control, even under varying water pressure and gravity conditions.
Implementation Method 1
the pressing component being sleeved with a first spring, and the first spring being configured to provide an elastic force for the pressing component to go back toward the lock nut
Implementation Method 2
the valve stem is sleeved with a second spring between the cap end and the stem seat; one end of the second spring is pressed against the stem seat, and the other end is pressed against the cap end, so that the valve stem will move toward the separator
Data Source
AI summary
A press type valve core has a case, a pressing structure, a stem seat and a valve stem, wherein, the pressing structure is configured on one end of the case, and the other end of the case is communicated with a water supply pipe, the case is formed with two water outlets on its two ends, and the internal portion of the case is formed with first and second cavities, the stem seat is configured inside the case, the valve stem is configured inside the second cavity, and the valve stem is pivoted on the stem seat, to shift between the blocked and communicated state of the flow path between the first cavity and the second cavity. The valve stem uses a plurality of supporting wings to avoid biased abrasion and wearing between the valve stem and the stem seat, and to enhance reliability in controlling the flow path.