Reinforced Explosion-Proof Housing With Thin-Wall Flameproof Gap
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Solution Overview
Problem
Conventional explosion-proof housings are heavy and expensive due to their robust construction, which is necessary to withstand explosion pressure without deforming and losing flameproof safety, but they are not easily manufactured or cost-effective.
Innovation Solution
An explosion-proof housing design featuring a housing body with thin walls connected by adhesive or material connections, reinforced by a detachable or permanently attached external frame that includes a ring frame part surrounding the housing opening, and a flameproof gap between the cover and the body to prevent ignition of external explosive atmospheres.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the enclosure walls are designed to be very sturdy to withstand explosion pressure, then the explosion protection reliability is improved, but the weight and manufacturing cost increase significantly
Solution Approach 1:
The housing is divided into two functional parts: thin-walled enclosure body for cost-effective manufacturing and a separate reinforcement frame for structural strength. This segmentation allows each part to be optimized independently - the enclosure body can use thin walls (reducing weight and cost) while the reinforcement frame provides the necessary explosion pressure resistance.
Solution Approach 2:
The housing combines different structural elements - thin-walled enclosure body made from cost-effective materials and a reinforcement frame made from high-strength materials. This composite structure achieves the required explosion protection reliability without using expensive materials throughout the entire housing, thus reducing overall weight and cost.
2Strength
If thick walls are used to prevent deformation during internal explosions, then the structural strength is improved, but the manufacturing cost and material usage increase
Solution Approach 1:
The structural strength function is segmented from the enclosure body and assigned to a separate reinforcement frame. This allows the enclosure body to use minimal material while the reinforcement frame concentrates the structural strength where needed, significantly reducing overall material usage.
Solution Approach 2:
Instead of uniformly thick walls throughout the housing, the reinforcement frame provides localized structural strength at critical areas (corners, edges, and openings) where explosion pressure causes maximum stress. This local reinforcement approach uses far less material than uniform thick walls while achieving the same structural strength.
3Strength
If a reinforcement frame is added to strengthen thin-walled housing, then the structural strength is improved, but the device complexity increases
Solution Approach 1:
The reinforcement frame serves multiple functions simultaneously: it provides structural strength to withstand explosion pressure, maintains the integrity of flameproof gaps, and can serve as a mounting structure for accessories. This multi-functionality reduces the need for additional components, thereby limiting the increase in device complexity.
Solution Approach 2:
The reinforcement frame acts as an intermediary element between the thin-walled enclosure body and the external environment. It absorbs and distributes explosion pressure forces, protecting the thin walls from direct stress while maintaining the overall structural integrity with minimal added complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design provides effective explosion protection while reducing material usage and manufacturing costs, allowing for safer operation with minimal deformation during internal explosions, ensuring the flameproof gap remains intact and prevents ignition of external explosive atmospheres.
Implementation Method 1
The housing walls can be connected to one another by welding, soldering, or gluing
Implementation Method 2
The housing walls can be connected to one another by welding, soldering, or gluing
Implementation Method 3
The housing walls can be connected to one another by welding, soldering, or gluing
Implementation Method 4
The gas flow path enabled by the ignition-proof gap is dimensioned such that hot gases, sparks, flames, arcs, or the like are sufficiently cooled or extinguished before they pass from the interior into the environment
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to an explosion-proof housing (10) with a housing body (11) which delimits an interior (13) and has a housing opening (14). The housing opening (14) can be closed by means of a cover (17). In the closed position of the cover (17), a flameproof gap (18) is formed between the housing body (11) and in particular a housing flange (15) of the housing body (11) and the cover (17). The housing body (11) has a plurality of housing walls (12), which have such a low wall thickness (s) that the housing walls (12) would not withstand the pressure of an explosion in the interior (13). The housing body (11) is therefore reinforced by a reinforcing frame (30) arranged outside the interior (13). The reinforcing frame (30) has a ring frame part (31) that is arranged adjacently to the housing opening (14) and fully surrounds the housing body (11) in an annular fashion. In particular, the ring frame part (31) directly adjoins the housing flange (15).