Pivoting Knife Gate Valve Housing for In-Place Sleeve Replacement
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Solution Overview
Problem
Existing knife gate valves require significant downtime and maintenance costs due to the time-consuming process of replacing the two-part sleeve, which often necessitates dismounting and relocating the valve for maintenance.
Innovation Solution
A knife gate valve design featuring a removable two-part sleeve with a sleeve compression assembly and pivotable upper and lower casing sections that allow for in-place sleeve replacement, enabling the sleeve to be securely engaged or disengaged based on operational configurations, reducing maintenance time and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the valve is dismounted and moved to a workshop for sleeve replacement, then the sleeve can be replaced, but the maintenance time and downtime increase significantly
Solution Approach 1:
The valve body is divided into an upper casing section and a lower casing section that can pivot relative to each other, allowing the sleeve to be accessed and replaced without moving the entire valve assembly. This segmentation enables localized maintenance while keeping the valve in its installed position.
Solution Approach 2:
The upper and lower casing sections are designed to pivot between a closed operative configuration and an open maintenance configuration. This dynamic mechanism allows easy access to the sleeve for replacement while maintaining structural integrity during operation, eliminating the need for complete valve disassembly.
2Productivity
If the valve remains in place during maintenance, then productivity is maintained, but the sleeve replacement process becomes more complex
Solution Approach 1:
By segmenting the valve body into pivotable upper and lower sections, the design enables on-site sleeve replacement without requiring complete valve disassembly. This maintains operational continuity while adding only minimal structural complexity through the pivot connection.
Solution Approach 2:
The valve is pre-configured with pivotable casing sections and a sleeve compression assembly that facilitates easy sleeve replacement. This preliminary design preparation allows maintenance to be performed quickly on-site without complex disassembly procedures during actual maintenance events.
3Reliability
If a compression assembly is added to secure the sleeve, then the sleeve fitting is improved, but the device complexity increases
Solution Approach 1:
The compression assembly is integrated into the pivotable casing mechanism, utilizing the natural movement of the upper and lower sections to apply compression force to the sleeve. This dynamic integration provides reliable sleeve securing without requiring a separate, complex compression mechanism.
Solution Approach 2:
The compression function is merged with the casing pivot mechanism, so that the same moving parts that enable maintenance access also provide the compression force needed to secure the sleeve. This combines multiple functions into a single integrated system, reducing overall complexity.
Data Source
Figure 1
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Figure 3~3a
AI summary
A knife gate valve including a knife valve gate, a gate actuation mechanism, operatively connected to the knife valve gate, a two-part sleeve and a valve body. The two-part sleeve includes an upstream section and a downstream section with the knife valve gate being selectively insertable therebetween. The valve body includes an upper casing section and a lower casing section pivotally connected to one another. The upper casing section and the lower casing section each include a concave cavity together defining a sleeve receiving channel of the valve body. The two-part sleeve is removably engageable in the sleeve receiving channel. The upper casing section and the lower casing section are pivotable between an operative configuration preventing removal of the two-part sleeve from the sleeve receiving channel and a maintenance configuration allowing insertion and removal of the two-part sleeve from the sleeve receiving channel.