Split Sealing Band Gate Valve for Burr-Free Pipe Installation
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Solution Overview
Problem
Conventional gate valves face durability issues due to the annular sealing member coming into contact with burrs on the outer circumferential face of the water pipe during installation, leading to impaired sealing and reduced durability.
Innovation Solution
A gate valve design featuring a sealing band with unitary main body portions and a connecting portion, split in the circumferential direction of the fluid pipes, which covers between the fluid pipes and the valve cage, preventing movement along the pipe axis and thus avoiding contact with potential burrs, and includes protrusions for enhanced sealing and attachment mechanisms for accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the joint wheel is moved in the pipe axis direction during installation, then the gate valve can be formed compact, but the annular sealing member can come into contact with burrs on the outer circumferential face of the water pipe, impairing sealing function and reducing durability
Solution Approach 1:
The sealing band is divided into multiple split members that are assembled radially around the water pipe. This segmentation allows the sealing band to be installed without axial movement, preventing contact with burrs while achieving compact design. The split members are joined together to form a complete sealing band that covers the gap between the valve cage and water pipe.
2Device complexity
If the sealing band is moved along the pipe axis direction during installation, then the gate valve structure can be simplified, but the inner circumferential face of the sealing band is damaged by burrs, reducing durability
Solution Approach 1:
The sealing band installation is changed from axial movement (one dimension) to radial assembly (another dimension). By assembling the split members radially around the water pipe, the sealing band achieves its sealing position without axial movement, avoiding burr damage while maintaining structural simplicity.
3Reliability
If the sealing band is composed of multiple split members assembled radially, then the sealing band avoids contact with burrs and durability is enhanced, but the attachment process becomes more complex
Solution Approach 1:
The sealing band is segmented into multiple members that can be assembled radially. This segmentation, while requiring multiple components, simplifies the attachment process by eliminating the need for axial movement and complex positioning mechanisms, making the overall manufacturing and installation more straightforward.
Data Source
AI summary
Provided are a highly durable and compact gate valve and a method of installing the gate valve. The gate valve includes a valve cage 12 accommodating a valve body and a sealing band 13 covering between a pair of fluid pipes W and the valve cage 12 under a sealed state. The valve cage 12 includes a pair of protruding tubular portion 12B protruding in a pipe axis direction X from a valve cage body. The sealing band 13 includes a pair of main body portions B1 covering the respective fluid pipes W1, W2 and the protruding tubular portions 12B under a sealed state and a connecting portion B3 connecting the pair of main body portions B1 and formed unitarily therewith and is constituted of a plurality of split members Ba split in a circumferential direction of the fluid pipes W.