Knife Gate Valve Retainer Ring Design for Dead-End Sealing
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Solution Overview
Problem
Gate valves in industrial applications face rapid degradation due to exposure to abrasive or corrosive materials, and existing solutions for dead-end service often require costly and difficult replacements of valve components.
Innovation Solution
A knife gate valve design incorporating retainer rings that provide dead-end service by transferring forces from the gate to the valve body, with wear rings and seals to prevent contact between the gate and valve body, allowing for removable and replaceable components to prevent unnecessary wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wear rings are allowed to contact the gate to provide sealing, then sealing performance is improved, but the valve body experiences unnecessary wear and component lifespan is reduced
Solution Approach 1:
A retainer ring is introduced as an intermediary component between the gate and the valve body. The retainer ring contacts the gate to provide sealing and force transfer, while preventing the gate from directly contacting the valve body, thus eliminating unnecessary wear on the valve body and extending its lifespan.
2Duration of action of stationary object
If retainer rings are used to prevent gate contact with valve body, then valve body wear is prevented, but device complexity increases due to additional components
Solution Approach 1:
The retainer ring is designed to perform multiple functions simultaneously: it provides sealing contact with the gate, transfers forces from the gate to the valve body, and prevents direct contact between the gate and valve body. This multi-functionality reduces the need for separate components, thereby minimizing the increase in device complexity.
Data Source
AI summary
A knife gate valve with an interior channel divided by an interior channel configured to receive a valve gate, the valve gate can travel along the interior channel. A removable first wear ring is disposed on the upstream side of the interior channel, the first wear ring substantially lining the upstream side of the interior channel; and a removable second wear ring disposed on the downstream side of the interior channel, the second wear ring substantially lining the downstream side of the interior channel; a first retainer ring adjacent to the gate on the upstream side of the valve; and a second retainer ring adjacent to the gate on the downstream side of the valve is disclosed. Other embodiments are also shown.