Equipotential Bonding Rail U-Profile Rigidity
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Solution Overview
Problem
Existing equipotential bonding rails are not suitable for use in potentially explosive environments due to the risk of ignition sparks forming at the connection area between the flat strip and the foundation earth conductor during voltage peaks.
Innovation Solution
The flat strip of material is designed to be rigid in the area covered by the clamping plate, with a U-shaped profile to increase flexural rigidity, ensuring the foundation earth conductor rests flat and securely on the strip, preventing sparking. Additionally, a counter plate on the opposite side enhances this rigidity and allows for higher clamping forces, and high-strength materials like VA are used for increased durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat strip of material is used for the equipotential bonding rail, then it is easy to manufacture and install, but it cannot withstand high clamping forces without deflection, causing sparking in explosive environments
Solution Approach 1:
The patent changes the physical parameter of the material strip from flat to U-shaped cross-section. This geometric parameter change significantly increases the flexural rigidity and moment of inertia of the strip, enabling it to withstand high clamping forces without deflection while maintaining ease of manufacture through simple stamping or extrusion processes.
Solution Approach 2:
The patent applies curvature by forming the material strip into a U-shaped cross-section rather than a flat configuration. This curved geometry provides inherent structural strength and rigidity, allowing the strip to resist bending forces during clamping operations while preventing sparking in explosive environments.
2Object-affected harmful factors
If high clamping forces are applied to prevent sparking, then safety in explosive environments is improved, but the flat strip deflects and cannot maintain flat contact
Solution Approach 1:
The U-shaped cross-section changes the structural parameters of the material strip, increasing its moment of inertia and section modulus. This allows the strip to maintain its shape and flatness under high clamping forces, ensuring continuous contact with the foundation earth conductor while preventing sparking.
3Reliability
If the material strip is made rigid to prevent deflection, then sparking is prevented, but the complexity of manufacturing increases
Solution Approach 1:
The patent achieves the required rigidity through a simple U-shaped cross-section that can be manufactured using conventional stamping, rolling, or extrusion processes. This parameter change provides the necessary structural strength without requiring complex multi-component assemblies or specialized manufacturing equipment.
Data Source
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AI summary
In order to improve a potential equalization rail (1) in the form of a flat strip of material (2) made of metal, to which a clamping plate (3) made of metal can be attached or fastened by means of fasteners (4) passing through the parts, wherein a flat foundation earth conductor (5) arranged transversely to the longitudinal direction of the strip of material (2) can be clamped or clamped between the strip of material (2) and the clamping plate (3), in such a way that it enables safe use in potentially explosive atmospheres, is cost-effective and easy to manufacture and has a long service life, it is proposed that the strip of material be designed to be so rigid, at least in the area covered by the clamping plate, that it withstands the clamping forces applied by the fasteners without deflection.