Check Valve Fluid Jacket and Coaxial Threads
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Solution Overview
Problem
Prior art check valves in natural gas compressor lubrication systems fail prematurely due to exposure to hot gases and debris, leading to premature failure and costly repairs, and existing protectors add complexity and risk of thread damage during installation.
Innovation Solution
A check valve design with a housing and check valve body that includes a fluid flow path with a fluid jacket surrounding the check valve body, preventing hot gases and debris from entering and protecting the sealing surfaces, and coaxial threaded connections to prevent over-torqueing and thread damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate check valve protector device is installed on the downstream side of the check valve, then the sealing surfaces are protected from hot gas and debris, but the device complexity increases and additional lubricant leak paths are introduced
Solution Approach 1:
The patent integrates the check valve protector function directly into the check valve body, eliminating the need for a separate protector device. The housing and internal components are designed to inherently protect sealing surfaces from hot gas and debris while maintaining a streamlined, single-unit structure that reduces system complexity and potential leak paths.
Solution Approach 2:
The check valve housing is designed to perform multiple functions: it houses the check valve mechanism, protects sealing surfaces from thermal and particulate damage, and provides a sealed pathway for lubricant flow. This multi-functional design eliminates the need for separate protective devices while enhancing overall system reliability.
2Adaptability or versatility
If the check valve inlet is oriented at a 90-degree position from the check valve protector axis, then the protector can be installed, but it prevents installation in applications where the cylinder is close to another cylinder and requires over-torqueing that damages threads
Solution Approach 1:
The patent employs asymmetric threading configurations where the inlet thread and outlet thread are positioned at different angular orientations along the housing axis. This asymmetric design allows the valve to be installed in various spatial configurations without requiring 90-degree offsets, enabling installation in tight spaces between cylinders while maintaining proper thread engagement without over-torqueing.
Solution Approach 2:
The patent transitions from a 90-degree lateral inlet configuration to an axial inlet configuration where the inlet is positioned along the same axis as the outlet. This dimensional repositioning allows for more compact installation footprints and eliminates the need for over-torqueing during installation, as the coaxial thread alignment provides natural self-alignment and proper torque distribution.
3Manufacturing precision
If over-torqueing is applied to position the check valve correctly, then alignment with system tubing connection is achieved, but extreme stress on threads destroys both cylinder threads and device threads
Solution Approach 1:
The patent incorporates pre-aligned threaded connections with built-in alignment features that guide the valve into correct positioning during installation. The coaxial inlet and outlet threads are designed with precise angular relationships that self-align during assembly, eliminating the need for over-torqueing to achieve proper alignment. This preliminary alignment design protects thread integrity while ensuring accurate tubing connection alignment.
4Productivity
If the check valve is exposed to hot gas and debris each time it opens, then lubricant can be injected into the compressor cylinder, but the sealing surfaces heat up and cause premature failure
Solution Approach 1:
The patent segments the internal flow path into a protected zone containing the sealing surfaces and an exposed zone that interfaces with the compressor cylinder. The housing design creates thermal and particulate barriers that isolate the sealing surfaces from hot gas and debris while maintaining the check valve's lubricant injection function. This segmentation allows the valve to perform its productivity function while protecting critical sealing surfaces from damage.
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
The design extends the life of check valves by protecting sealing surfaces from hot gases and debris, reducing the need for costly repairs and compressor downtime, and allowing for easier installation without thread damage, thus reducing operational costs and environmental impact.
Implementation Method 1
fluid is retained within a portion of the fluid flow path to substantially surround the check valve body preventing gas and debris from the outlet from entering the check valve body
Data Source
AI summary
A check valve supplies fluid to a system and includes a fluid barrier protects the sealing elements and surfaces of the check valve preventing degradation from any backflow of gas and debris from the system to which fluid is supplied.