Check Valve Guide Member Positioning for Flow Rate
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Solution Overview
Problem
Conventional check valves with guide members have a small fluid passing area around the ribs and guide member, resulting in a limited flow rate due to the positioning of the ribs within the inlet, which restricts fluid flow.
Innovation Solution
The guide member is positioned at the inner ends of ribs that project into the valve chest from the inlet's inner wall, creating a recess in the valve element to accommodate the ribs and guide member, ensuring they are within the larger diameter valve chest, thereby increasing the fluid passing area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the guide member is positioned within the inlet, then the guide member can be easily integrated with the valve structure, but the fluid passing area becomes small and the flow rate is limited
Solution Approach 1:
The guide member is repositioned from the inlet region to the valve chest region, utilizing the larger spatial dimension of the valve chest to accommodate the guide member and ribs. This dimensional relocation increases the available fluid passing area while maintaining the guiding function, thereby resolving the contradiction between ease of manufacture and flow rate.
2Ease of manufacture
If the ribs project into the inlet, then the guide member can be formed at the inner ends of the ribs, but the fluid passing area around the ribs and guide member is reduced
Solution Approach 1:
The ribs are extended to project into the valve chest rather than remaining within the inlet. This positional change in the axial dimension allows the guide member formed at the rib ends to be located in the valve chest region, thereby increasing the fluid passing area in the inlet region while maintaining the ease of forming the guide member at the rib ends.
3Area of stationary object
If the valve chest has a larger diameter than the inlet, then more space is available for fluid flow, but the guide member positioning becomes more critical to maintain flow efficiency
Solution Approach 1:
The guide member acts as an intermediary element that mediates between the larger valve chest diameter and the inlet region. By positioning the guide member in the valve chest at the ends of the ribs, it guides the valve stem while minimizing obstruction to the increased fluid passing area provided by the larger valve chest diameter, thereby maintaining flow rate efficiency.
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 configuration significantly increases the fluid passing area around the ribs and guide member, enhancing the flow rate while preventing reverse fluid flow by ensuring the guide member and ribs are within the larger diameter valve chest.
Implementation Method 1
a guide member with which an outer periphery of the valve stem is in sliding contact
Data Source
AI summary
An inlet, a valve chest having a diameter larger than that of the inlet, and an outlet are formed in a valve casing. An annular valve seat is formed between the inlet and the valve chest. A valve element for opening and closing the annular valve seat is disposed within the valve chest. A valve stem is projectingly provided on the inlet side of the valve element. A guide member with which an outer periphery of the valve stem comes into sliding contact is provided at inner ends of ribs which project into the valve chest from an inner wall of the inlet. A recess is formed in the valve element to receive therein the ribs projecting to the valve element and also to receive the guide member.