Removable Center Section Ball Valve for Maintenance Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing valve technologies lack efficient methods for accessing and repairing internal parts without disconnecting from the flowline, particularly for high-temperature and high-pressure fluids, and require welding or cutting of welds for maintenance.
Innovation Solution
A ball valve design with a removable central section that allows for minimal separation from the flowline, enabling inspection, repair, or replacement of internal components without pre-removal heating or cutting, using a spring-biased sealing mechanism and gaskets for bidirectional sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve body is made as a single integrated piece, then the structural strength and sealing reliability are improved, but the complexity of maintenance and repair increases significantly
Solution Approach 1:
The valve body is divided into multiple separable sections (inlet end connection, outlet end connection, and center section) that can be detached from each other. This segmentation allows the center section containing the ball and seats to be removed independently for maintenance while the end connections remain attached to the flowline, thus maintaining sealing reliability through proper gasket interfaces while significantly easing repair complexity
Solution Approach 2:
The center section containing the ball, seats, and spring assembly is extracted as a removable component from the valve body. This extraction enables direct access to internal parts for inspection and repair without requiring complete valve disassembly or welding operations, resolving the contradiction between integrated structure reliability and maintenance accessibility
2Strength
If welding is used to connect the valve to the flowline, then the connection strength is improved, but the difficulty of maintenance and part replacement increases
Solution Approach 1:
The valve connection system is segmented into weldable end connections that attach to the flowline and a removable center section. The end connections maintain strong welded attachments to the flowline while the center section uses mechanical fastening (bolts and gaskets) that allows tool-free or minimal-tool removal, thus preserving connection strength while enabling easy maintenance
Solution Approach 2:
Gaskets serve as intermediary sealing elements between the removable center section and the welded end connections. These gaskets enable the center section to be detached and reattached without affecting the welded connections to the flowline, thus maintaining the strength of permanent connections while facilitating easy maintenance of internal components
3Ease of repair
If the valve is designed with a removable center section, then the ease of maintenance is improved, but the device complexity increases
Solution Approach 1:
The valve is segmented into modular sections (end connections and center section) that are relatively simple in individual design. The segmentation itself provides the maintenance advantage, and the modular nature actually reduces overall complexity by allowing standardized, interchangeable components rather than a complex monolithic structure
Solution Approach 2:
The center section is designed as a universal removable module that can contain different internal configurations (ball valves, gate valves, etc.) while maintaining the same external interface and removal procedure. This multi-functionality approach simplifies the overall system by using a standardized removable interface across different valve types, reducing the complexity burden of the removable design
4Ease of operation
If minimal separation is used to remove the center section, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The valve is pre-assembled with built-in clearance or play in the connection interfaces between the center section and end connections. This preliminary design feature allows the center section to be removed with minimal spreading force without requiring precise control of separation distance during operation, thus improving ease of operation while the manufacturing precision is applied during the initial assembly stage rather than during maintenance operations
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
Facilitates easy access and maintenance of valve parts without welding or cutting, suitable for various fluid applications, including high-temperature and high-pressure conditions, enhancing valve technology and reducing maintenance complexity.
Implementation Method 1
the center section contains a spring or springs to bias a seat, e.g. an upstream sealing seat (if present), a downstream seat, or both
Implementation Method 2
In certain particular embodiments, separation of the center section of the valve from the valve body is accomplished with minimal spreading of the valve body apart from the center section
Data Source
AI summary
Valves with a removable central section for access to parts of the valve, the valve securable between corresponding ends of a line, e.g. a flowline, process fluid line, or pipeline; such valves which are ball valves; and methods to access parts of a valve and/or a line interior.