Knife Gate Valve Liner Assembly for Reusable Wear Sealing
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Solution Overview
Problem
Existing knife gate valves with one-piece liners are prone to wear and tear, leading to the entire valve being discarded once the liner is worn out, as they lack effective sealing mechanisms for reuse.
Innovation Solution
A housing assembly for a knife gate valve featuring a two-part body with flange recessed portions and a one-piece liner with radial sealing beads, allowing for engagement between the liner flanges and raised beads to form a secure seal, enabling the valve to operate with slip-on flanges and reducing the need for separate gaskets, thus allowing for potential reusability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a one-piece liner is used to line the valve body, then the valve body is protected from wear, but the entire valve must be discarded when the liner wears out due to lack of sealing mechanisms for reuse
Solution Approach 1:
The liner is divided into multiple separable sections rather than being a single integrated piece. This segmentation allows individual liner sections to be replaced while retaining the valve body and other components, enabling partial reuse and reducing waste when the liner wears out.
Solution Approach 2:
The design enables recovery and reuse of the valve body and non-wearing components after the liner is replaced. The separable liner sections can be discarded while the main valve structure is recovered and reused, addressing the environmental and economic issue of discarding entire valves.
2Ease of manufacture
If traditional casting methods are used for the valve body, then manufacturing is straightforward, but the valve lacks effective sealing mechanisms for reuse after liner wear
Solution Approach 1:
The valve body is divided into separable sections with standardized coupling mechanisms. This segmentation maintains manufacturing simplicity while enabling modular assembly and disassembly for liner replacement and reuse of other components.
Solution Approach 2:
The liner sections are nested within the valve body sections, with the liner fitting inside the valve body cavity. This nested arrangement allows the liner to be inserted and removed independently while maintaining the structural integrity of the valve body.
3Ease of operation
If the liner is designed as a single integrated piece, then installation is simple, but the liner cannot be replaced without replacing the entire valve
Solution Approach 1:
The liner is segmented into multiple sections that can be installed and replaced independently. Each section can be handled and installed separately, maintaining ease of operation while enabling selective replacement of only the worn liner sections rather than the entire valve assembly.
4Device complexity
If the valve is designed for complete replacement when worn, then manufacturing simplicity is maintained, but material waste increases and reusability is reduced
Solution Approach 1:
The valve is segmented into replaceable liner sections and permanent valve body components. This segmentation increases structural complexity slightly but dramatically reduces material waste by enabling replacement of only the consumable liner portions while retaining and reusing the durable valve body and other components.
Solution Approach 2:
The design implements a strategy where only the worn liner sections are discarded while the valve body, coupling mechanisms, and other non-wearing components are recovered and reused, significantly reducing overall material waste compared to complete valve replacement.
Data Source
AI summary
Embodiments of the invention provide a housing assembly for a knife gate valve. The housing assembly includes a valve body defining a passageway and having a first body and a second body, and a one-piece liner arranged between the first body and the second body. The first body and the second body each include a flange recessed portion that defines a flange recess surface. Each of the flange recess surfaces includes a first flange surface portion, a second flange surface portion, and a raised flange bead. The one-piece liner includes a first liner flange portion that forms a first liner recess. The first liner recess receives the flange recessed portion of the first body to bring the raised flange bead of the first body into engagement with the first liner flanged portion.