Explosion-Proof Housing With Interlocking Surface Profiles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing housing designs for electrical equipment in potentially explosive atmospheres face challenges in creating a reliable, explosion-proof gap that is not restricted by cross-sectional shape, particularly for angular housings where traditional flat or threaded surfaces are used, limiting accessibility and flexibility.
Innovation Solution
The housing features interlocking surface profiles that engage without the need for screwing, allowing for smaller dimensions and varying orientations, including angular and inclined surfaces, to form a puncture-proof gap that meets explosion protection requirements, regardless of the housing's cross-sectional shape, and can be made from various materials like metals and plastics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flat joining surfaces are used for rectangular enclosures, then the flameproof gap can be formed between flat sides, but the joining surfaces require larger dimensions to maintain the required gap length
Solution Approach 1:
The patent applies surface profiling with curved or rounded features (such as recesses and protrusions) on the joining surfaces. This curvature allows the flameproof gap to be maintained with smaller overall joining surface dimensions, as the profiled surfaces create the necessary gap length through their geometric configuration rather than requiring large flat areas.
2Ease of operation
If threaded surfaces are used for circular enclosures, then the housing parts can be screwed together, but rotation of the housing parts is necessary which restricts the cross-section design
Solution Approach 1:
The surface profiling incorporates curved or rounded features that enable direct contact and engagement between housing parts without requiring rotational assembly. This curved geometry allows the joining surfaces to mate directly in various orientations, providing versatility for different cross-sectional shapes including angular sections, while maintaining ease of assembly through simple contact engagement.
3Volume of stationary object
If smaller joining surface dimensions are used, then the housing size can be reduced, but the flameproof gap length may be insufficient for explosion protection
Solution Approach 1:
The profiled surfaces with curved or rounded features create an extended flameproof gap path within the smaller joining surface area. The geometric configuration of the profiling (recesses and protrusions) ensures that the gap length meets explosion protection requirements while allowing the overall housing volume to be reduced.
Solution Approach 2:
The surface profiling adds dimensional complexity to the joining surfaces by creating multi-level features (recesses and protrusions). This transforms a two-dimensional flat surface problem into a three-dimensional solution, where the flameproof gap length is achieved through vertical and horizontal profiling features rather than simply increasing the overall surface area.
4Area of stationary object
If surface profiling is used to increase flameproof gap length, then smaller joining surfaces can be used, but the production complexity of the joining surfaces increases
Solution Approach 1:
The surface profiling uses curved or rounded geometric features that can be efficiently manufactured using standard machining, molding, or casting processes. These profiled surfaces, while more complex than flat surfaces, represent a practical compromise that achieves the flameproof gap requirements with manageable production complexity through conventional manufacturing techniques.
Data Source
Figure 1~5
AI summary
The invention relates to a housing (1) for an electrical operating means such as a light, plug-in device, measuring instrument, switch, distributor, or the like, having at least one first and one second housing part (2, 3) that can be assembled with one another in an explosion-proof fashion. Each housing part has one joining surface (4, 5); when the housing parts are assembled, said joining surfaces are in contact with one another, forming a penetration-proof gap (6). In order to provide a novel structure of joining surfaces by means of which a corresponding penetration-proof gap is formed independently of the cross-sectional shape of the housing parts and to be able to substantially unite the advantages of both joining surfaces and the housing mentioned above, the joining surfaces run substantially perpendicular relative to the rest of the housing parts and surface profiles (7, 8) are formed in said joining surfaces, the penetration-proof gap being formed between said surface profiles.