Valve Assembly Coupler Design for Limited-Access Pump Maintenance
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Solution Overview
Problem
Reciprocating pumps used in oil and gas operations face challenges in maintaining access to pump components due to high cyclical pressures, leading to wear and the need for frequent servicing and maintenance.
Innovation Solution
A reciprocating apparatus with a valve assembly featuring a valve seat, valve body, valve spring, and valve guide, where the valve guide has wings that align with grooves on the valve seat, allowing for restricted rotation and easy coupling/decoupling with the valve body, facilitating maintenance by enabling access to the valve body without removing the valve seat or housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve body is tightly integrated with the valve seat and housing to ensure sealing and structural integrity, then reliability is improved, but ease of repair deteriorates as component access becomes difficult
Solution Approach 1:
The valve assembly is divided into separable components: the valve body can be detached from the valve seat and housing through the access port. This segmentation allows the valve body to be removed for repair while leaving the valve seat and housing in place, resolving the contradiction between tight integration for sealing and separability for ease of repair.
2Manufacturing precision
If the valve assembly requires complete disassembly for maintenance, then manufacturing precision can be maintained, but loss of time increases due to extended maintenance periods
Solution Approach 1:
The valve body is designed as a separable component that can be accessed and removed through the access port without disassembling the entire valve assembly. This allows maintenance personnel to quickly remove and replace only the valve body, significantly reducing maintenance time while maintaining manufacturing precision through proper sealing interfaces.
Solution Approach 2:
The valve body is extracted as a separate serviceable component from the valve assembly. By providing an access port that allows the valve body to be removed while leaving the valve seat and housing in place, the design enables quick maintenance without requiring complete disassembly, thus reducing loss of time while preserving manufacturing precision.
3Ease of operation
If the valve guide is freely rotatable, then ease of operation improves during assembly, but reliability deteriorates due to misalignment with grooves
Solution Approach 1:
The valve guide incorporates asymmetric features including wings that engage with corresponding grooves in the valve seat. This asymmetric design prevents rotation of the valve guide, ensuring reliable alignment with the grooves while still allowing ease of operation during assembly through the access port.
Data Source
AI summary
A valve assembly comprising a valve seat, a valve body, a valve spring, and a valve guide, wherein the valve seat and/or a valve seat housing in which the valve seat is seated comprises a plurality of grooves; wherein the valve body comprises a first side comprising a valve seat contact surface, and a second side comprising a coupler actuating feature; and wherein the valve guide comprises a coupler, and a plurality of wings, wherein the valve guide comprises a valve guide end distal the coupler, wherein, when the valve guide is coupled to the valve body via the coupler, the valve guide end distal the coupler extends a greater radial distance from the central axis of the valve body than the plurality of wings, and wherein the valve guide can be coupled to or decoupled from the valve body via the coupler by actuating the coupler actuating feature.