Control Valve Sealing Rib Structure to Prevent Assembly Deformation
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Solution Overview
Problem
Multi-passage control valves experience local deformation of sealing members during assembly, which affects the sealing effectiveness.
Innovation Solution
A control valve design featuring a valve body with a position-limiting rib and a sealing member with a first and second portion, where the first portion is fixedly connected to the second portion and located in a gap between the side wall and the position-limiting rib, limiting the assembly position of the sealing member and reducing local deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the sealing member is assembled separately from the valve body, then the sealing member can be independently manufactured and replaced, but the sealing member may experience local deformation during assembly which affects sealing effectiveness
Solution Approach 1:
A positioning rib structure is introduced as an intermediary element between the valve body and sealing member. The positioning rib includes a positioning portion that fits into a positioning groove on the sealing member, and a limiting portion that restricts the sealing member's position during assembly. This intermediary structure guides the sealing member into the correct position, preventing local deformation while maintaining independent manufacturability.
Solution Approach 2:
The positioning rib structure is pre-formed on the valve body before assembly with the sealing member. The positioning groove and limiting portion are prepared in advance, so that when the sealing member is assembled, it automatically finds its correct position without requiring complex alignment procedures, thereby preventing deformation during the assembly process.
2Ease of operation
If the sealing member is made as a separate component, then assembly and replacement are easier, but the positioning and stability during assembly are reduced
Solution Approach 1:
The positioning rib acts as a mediator that provides stable positioning for the separately manufactured sealing member. The rib's positioning portion and limiting portion create a stable geometric relationship between the valve body and sealing member, ensuring correct positioning while maintaining the ease of separate assembly and replacement.
3Device complexity
If no positioning structure is provided for the sealing member, then the assembly process is simpler, but the sealing member cannot be properly positioned which leads to deformation
Solution Approach 1:
The positioning function is segmented into distinct features: a positioning groove on the sealing member and a positioning rib with a positioning portion and limiting portion on the valve body. This segmentation allows for simple assembly while providing precise position control, as each segment performs a specific function in the positioning sequence.
Solution Approach 2:
The positioning rib structure serves as an intermediary mechanism that bridges the simplicity of assembly with the precision of positioning. The rib's geometry automatically guides the sealing member into the correct position during assembly, providing position control without complicating the assembly process.
Data Source
AI summary
A control valve, comprising a valve body, a valve element assembly, and a sealing member, wherein the valve body is provided with a mounting cavity, and at least part of the valve element assembly is located in the mounting cavity; the valve body comprises a bottom wall, a side wall and a limiting rib, the side wall is arranged to protrude from the bottom wall, the limiting rib comprises an arc-shaped section, is located in a space enclosed by the side wall and the bottom wall, and protrudes out of the bottom wall, and a gap is provided between the side wall and the limiting rib; the sealing member comprises a first part and a second part, the axial end close to the sealing member being defined as the first part.