Replaceable Trim Cartridge for Worn Linear Control Valves
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Solution Overview
Problem
Conventional linear control valve assemblies experience wear in critical areas due to high-pressure fluids, leading to improper fluid flow restriction and costly, tedious replacement of the entire valve housing.
Innovation Solution
A fluid control valve with a replaceable trim cartridge that includes a cage and a plug, allowing for easy replacement of worn components without disassembling the entire valve, maintaining optimal fluid control performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire valve housing is replaced when wear occurs in critical areas, then the valve can be restored to proper function, but the repair process becomes costly and time-consuming
Solution Approach 1:
The valve is divided into a reusable housing and a replaceable trim cartridge. The trim cartridge contains the worn components (plug, cage, seal) as separate segments that can be individually replaced without affecting the housing, thus reducing repair time while maintaining valve function.
Solution Approach 2:
The trim cartridge is extracted as a removable unit from the valve housing. This allows the worn trim components to be taken out and replaced independently, eliminating the need to replace or disassemble the entire housing, thereby reducing repair time and cost.
2Reliability
If the entire valve housing is replaced when wear occurs in critical areas, then the valve can be restored to proper function, but the cost of repair increases
Solution Approach 1:
The valve is segmented into a durable housing and a consumable trim cartridge. Only the inexpensive trim cartridge needs replacement, not the expensive housing, significantly reducing maintenance costs while restoring valve function.
Solution Approach 2:
The trim cartridge is designed as a disposable or replaceable component with a limited service life. When worn, it is replaced with a new cartridge while the housing is reused, avoiding the high cost of replacing the entire valve assembly.
3Ease of repair
If the valve housing is disassembled to replace worn surfaces, then the worn components can be replaced, but the process becomes tedious and complex
Solution Approach 1:
The valve assembly is segmented into a housing and a pre-assembled trim cartridge. The cartridge acts as a modular unit that can be replaced as a single component, simplifying the repair process and reducing the complexity of disassembly and reassembly operations.
Solution Approach 2:
The trim cartridge is extracted as a complete removable unit containing all wear-prone components. This allows replacement of multiple worn parts through a single insertion/removal operation, making repair easier while maintaining the overall valve structure.
Data Source
AI summary
A fluid control valve includes a housing defining inlet and outlet passages and an opening in communication with the passages, with the opening extending along a main axis. A replaceable trim cartridge is configured to be removably insertable into the opening along the main axis. The replaceable trim cartridge includes a cage defining a piston chamber, a cage inlet, a cage outlet, and an internal flow control configuration extending between the cage inlet and the cage outlet. The trim cartridge further includes a piston head movable within the piston chamber. A plug is coupled to the piston head and includes an external flow control configuration. The plug is moveable within the cage between a closed position and an open position, with at least a portion of the plug being in contact with the cage when the plug is in the closed position to restriction fluid flow through the cage.