Angle Check Valve Unit Replacement Without Pipe Disconnection
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Solution Overview
Problem
Angle type check valves face challenges in maintainability, particularly in replacing the valve body and seat without releasing piping connections, and existing configurations are inefficient due to the need for bolt loosening and tightening in narrow spaces.
Innovation Solution
An angle type check valve design featuring a valve unit that includes a valve seat, valve body, and hinge mechanism, integrated as a single unit, with a pushing tool that allows for easy assembly and disassembly through an access hole, eliminating the need for bolt fastening and enabling replacement without disconnecting piping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the valve body and seat are integrated as a single unit, then maintainability is improved by simplifying replacement, but device complexity increases due to the integrated structure
Solution Approach 1:
The check valve is divided into two main segments: a valve body unit (including valve body, seat, and hinge mechanism integrated together) and a valve box. This segmentation allows the valve body unit to be replaced as a single module without disassembling the entire valve, improving maintainability while keeping the overall structure manageable.
Solution Approach 2:
The valve body, seat, and hinge mechanism are merged into a single integrated valve body unit. This merging eliminates the need to handle these components separately during replacement, simplifying maintenance operations. The integrated unit is then coupled to the valve box through a standardized coupling mechanism, balancing integration benefits with structural clarity.
2Strength
If bolt coupling is used to fasten the valve body, then connection strength is improved, but ease of operation deteriorates due to the need for bolt loosening and tightening in narrow spaces
Solution Approach 1:
The complex bolt fastening mechanism is extracted and replaced with a simpler coupling structure. The valve body unit couples to the valve box through a standardized interface that allows for tool-free or minimal-tool assembly and disassembly, eliminating the need for multiple bolts and nuts in the narrow valve box space.
Solution Approach 2:
Instead of using a traditional bolt-fastening approach where components are pulled together by fasteners, the design uses a coupling mechanism where the valve body unit is inserted into and retained by the valve box through interference fit or mechanical interlocking. This inversion of the fastening concept simplifies the assembly process while maintaining connection strength.
Data Source
AI summary
There is provided an angle type check valve which enables simple and quick replacement operations of a valve body and a valve seat without releasing a piping coupled state and has excellent maintainability. The angle type check valve according to the present invention includes: a valve box main body which is provided with an inflow port opened on a lower side, an outflow port opened on a lateral side, and an access hole opened on an upper side, and in which a valve chamber that has a bent shape is formed; a lid body which seals the access hole; a valve seat which is provided with a valve port; a valve body which opens and closes the valve port; and a hinge mechanism which supports the valve body. As a valve unit, the valve seat, the valve body, and the hinge mechanism are integrally assembled so as to be made into a unit part. The valve unit is attached to and detached from a unit fitting portion in the valve box main body. A pushing tool is provided which exerts pushing force in a direction of pressing a lower surface of the valve unit against the unit fitting portion in accordance with the operation of fitting the lid body in the access hole.