Ball Valve Cartridge Assembly for Rapid Component Replacement
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Solution Overview
Problem
Ball valves in hostile environments require frequent replacement of key components due to wear and corrosion, which can be time-consuming and result in downtime, especially when individual components need to be replaced and re-aligned.
Innovation Solution
A cartridge assembly in the ball valve that includes a spherical ball with flow passages, resilient Belleville washers for biasing, and wear-resistant coatings, allowing for rapid replacement and adjustment of components, ensuring a secure seat-to-body seal and minimizing downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual components are replaced in the ball valve, then the worn parts can be renewed, but the replacement process is time-consuming and requires downtime
Solution Approach 1:
The ball valve components (ball, valve seats, springs, sealing elements) are segmented into a modular cartridge assembly that can be removed and replaced as a single unit. This segmentation allows the entire operating component set to be exchanged rapidly without disassembling individual parts, resolving the contradiction between component renewal and replacement time by pre-assembling replaceable modules.
Solution Approach 2:
The cartridge assembly is pre-assembled with all necessary components (ball, seats, springs, seals) in the correct configuration before installation. This preliminary assembly eliminates the need for time-consuming field alignment and adjustment during replacement, allowing operators to simply swap the entire cartridge unit and restore service immediately.
2Ease of repair
If individual components are replaced in the field, then repairs can be made, but the valve must be cut out of the line requiring additional downtime
Solution Approach 1:
The cartridge is designed as a self-contained segmented module that can be extracted from the valve body as a complete unit. This segmentation enables field repair operations to be performed on the removed cartridge away from the live line, eliminating the need to cut the valve from the pipeline and minimizing interruption to fluid flow.
Solution Approach 2:
The entire cartridge assembly is extracted from the valve body through a convenient access opening, allowing complete removal of worn components without disturbing the pipeline connection. This extraction principle enables repair personnel to service the cartridge in a controlled environment away from the pressurized line, then reinstall it to restore service.
3Adaptability or versatility
If components are individually replaced, then customization is possible, but tolerances introduce alignment problems
Solution Approach 1:
The cartridge assembly segments the ball, seats, and springs into a pre-aligned modular unit manufactured with controlled tolerances. This segmentation allows precision alignment to be achieved during controlled factory assembly rather than field installation, eliminating tolerance accumulation problems while maintaining the ability to customize different cartridge configurations for various applications.
Solution Approach 2:
Multiple components (ball, valve seats, springs, sealing elements) are merged into a single pre-assembled cartridge unit with integrated alignment features. This merging ensures that all components are precisely positioned relative to each other during manufacturing, eliminating the alignment problems that arise when individual parts are installed separately in the field.
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
Enables quick and efficient replacement of worn components, reducing downtime and operational costs while maintaining a long-lasting and economical solution for high-temperature and corrosive fluid applications.
Implementation Method 1
resiliently deflectable biasing means bears upon the cartridge body
Implementation Method 2
The ball and at least the outlet seat have a wear resistant coating thereon
Data Source
AI summary
A ball valve has a valve body having a chamber, aligned inlet and outlet passages providing flow therethrough, and an access passage communicating with the chamber. A replaceable cartridge assembly is seated in the chamber and includes a generally spherical ball having a flow passage therethrough alignable with the inlet and outlet passages, an inlet valve seat, and an outlet valve seat. A cartridge body member extends about and couples the ball and the valve seats. A resiliently deflectable biasing member biases the inlet valve seat and the ball against the outlet seat. A resiliently deflectable biasing member acts upon the inlet end of the cartridge body and a deflector is movable between a first position in which the biasing member is substantially free from deflection and a second position in which the biasing member is deflected to bias the cartridge body and the outlet valve seat against the wall of the valve body chamber to effect a seat-to-body seal.