Flameproof Housing With Segmented Clamp Sealing
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Solution Overview
Problem
Existing flameproof enclosures for large volumes face challenges in ensuring explosion protection by preventing the escape of flames, hot gases, and glowing particles, particularly due to the need for precise gap dimensions and attachment bolt holes which can lead to static redundancy and assembly complexities.
Innovation Solution
A flameproof housing design featuring a housing body with a flange and a cover clamped by multiple clamps along the edge and flange, eliminating the need for through-openings for bolts, allowing for adjustable gap lengths and ensuring reliable sealing without compromising accessibility, suitable for large openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If through-openings or holes are provided for attachment bolts, then the housing can be securely closed, but the width of the flange must be increased beyond the necessary gap length
Solution Approach 1:
The attachment system is segmented into multiple discrete clamps distributed along the flange and cover edge, replacing the conventional bolt-hole approach. Each clamp independently secures a section of the cover, eliminating the need for through-openings while maintaining secure closure.
Solution Approach 2:
The clamps are designed to engage with the flange and cover edge without requiring holes or openings in the housing structure. The attachment function is extracted from the flange itself and performed by separate clamp elements that wrap around and secure the cover.
2Reliability
If multiple attachment bolts are used for large area covers, then explosion protection is ensured, but static redundant dimensions occur and assembly becomes complex
Solution Approach 1:
The clamps are designed as movable elements that can be easily opened and closed, transforming the static bolt-hole attachment system into a dynamic one. This allows for simpler assembly and disassembly while maintaining the necessary secure closure for explosion protection.
Solution Approach 2:
Instead of passing bolts through holes from one side to the other, the clamps wrap around the cover edge and flange in reverse fashion, securing the cover without requiring penetration through the housing walls. This inversion simplifies the assembly process.
3Ease of operation
If the flange is positioned to allow accessibility, then the opening clearance is maintained, but precise gap dimensions must be ensured for explosion protection
Solution Approach 1:
The clamps serve as intermediary elements between the flange and cover edge, providing a mechanical means to maintain precise gap dimensions while allowing the flange to be positioned for accessibility. The clamps compensate for positioning variations and ensure consistent gap formation.
Data Source
AI summary
A housing according of the flameproof encapsulation protection type having a housing body which has an opening closed by a cover. The opening is surrounded by a flange which is directed outward away from the housing body. The edge of the cover lies flat on the flange. The edge and the flange are both preferably continuous. In any case, the edge and the flange do not have any passage openings for clamping means. In order to clamp the edge against the flange, clamps are provided which hold the edge and the flange pressed against each other in the manner of screw clamps. The clamps are provided with releasable clamping means and are preferably captively retained on the housing body or the cover, the clamps being movable between a closed position, in which the cover is fixedly clamped, and an open position, in which the clamps do not extend over the cover and allow the cover to be opened unhindered.