Valve Guide Structure to Block Foreign Matter Ingress
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Solution Overview
Problem
Existing valve devices allow foreign matter, such as moisture, to enter the area between the valve body and the case, leading to potential solidification and interference with the valve operation.
Innovation Solution
The valve device incorporates a guide body with one end spaced apart from the housing, a diameter-expanding part, and a valve head part to prevent foreign matter from entering the area between the guide body and valve body, using a cylindrical guide body with supports and a valve shaft that covers this area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the guide body is in abutment with the housing (valve seat), then the guide body is properly positioned and supported, but foreign matter can travel along the guide body and enter the area between the guide body and valve body
Solution Approach 1:
The patent extracts the harmful element (foreign matter) from the system by creating a separation between the guide body and housing. The guide body is positioned to be spaced apart from the housing in the axial direction, preventing foreign matter that adheres to the housing from traveling along the guide body and entering the critical area between the guide body and valve body.
Solution Approach 2:
The patent introduces an intermediary space (gap) between the guide body and housing that acts as a barrier to foreign matter. This spacing creates a physical separation that prevents foreign matter from the housing from reaching the guide body and entering the valve body area.
2Reliability
If foreign matter enters the area between the guide body and valve body, then the valve operation may be interfered with, but preventing foreign matter ingress requires additional structural features
Solution Approach 1:
The patent segments the housing structure by introducing a diameter-expanding part that creates distinct zones. This segmentation divides the housing into sections with different diameters, allowing the guide body to be positioned in a specific zone that is protected from foreign matter while maintaining proper support and alignment.
Solution Approach 2:
The patent uses axial spacing (adding a dimensional element) to prevent foreign matter ingress. By spacing the guide body apart from the housing in the axial direction, the patent creates a new spatial dimension that blocks foreign matter pathways without complicating the radial or circumferential structure.
Data Source
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AI summary
This valve device includes: a housing including a valve port located on one side in an axial direction and through which gas flows, and a valve chamber connected to the valve port; a guide disposed in the valve chamber and including a guide body that is cylindrical and a plurality of supports that extend outward from an outer peripheral surface of the guide body and abut an inner peripheral surface of the valve chamber; and a valve body inserted into the guide body and configured to open and close the valve port. One end of the guide body is spaced apart from the housing in the axial direction.