Shielded Frame for Cable Penetrations with Conductive Mesh
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Solution Overview
Problem
Existing frames for cable entries and pipe penetrations are ineffective in damping electromagnetic disturbances within the conductors of cables, as they rely on complex and costly EMC modules that compromise sealing capacity and achieve limited damping of up to 60 dB, which is insufficient for sensitive environments requiring at least 60 dB of damping.
Innovation Solution
A frame design incorporating a layer of conductive material, such as metal threads or needle-felt mats, placed inside the frame in contact with the cable screens to ground and dissipate electromagnetic interference, using standard components to enhance damping to over 100 dB without the need for additional complex components or covers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If complex EMC modules with waveguides and RFI screens are used, then electromagnetic disturbance damping is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the essential function of electromagnetic shielding from complex EMC modules and implements it using a simple conductive mesh layer combined with standard compression modules. This removes the unnecessary waveguide structures and complex RFI screen assemblies while retaining the core damping functionality, achieving over 100 dB damping with significantly reduced complexity
Solution Approach 2:
The patent changes the approach from using thick, complex structured EMC modules to using a thin conductive mesh layer with proper grounding. This parameter change in the shielding structure, combined with optimized grounding of cable screens, achieves superior damping performance (>100 dB) compared to traditional modules (60 dB maximum)
2Object-affected harmful factors
If complex EMC modules with waveguides and RFI screens are used, then electromagnetic disturbance damping is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive, complex EMC modules with inexpensive standard compression modules and a simple conductive mesh layer. This substitution dramatically reduces material costs and manufacturing complexity while achieving superior electromagnetic damping performance of over 100 dB
Solution Approach 2:
The patent makes standard compression modules multi-functional by combining them with a conductive mesh layer that provides both mechanical compression/sealing and electromagnetic shielding. This eliminates the need for separate expensive EMC modules, reducing overall manufacturing cost while improving damping performance
3Device complexity
If standard modules are used instead of EMC modules, then device complexity and cost are reduced, but electromagnetic disturbance damping capability is insufficient
Solution Approach 1:
The patent merges the mechanical sealing function of standard compression modules with the electromagnetic shielding function of a conductive mesh layer into a single integrated structure. This combination achieves over 100 dB damping capability while maintaining simplicity and avoiding the need for complex separate EMC modules
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 solution effectively dampens electromagnetic disturbances by grounding the conductive material, achieving damping levels exceeding 100 dB with standard components, improving protection in sensitive environments while maintaining sealing integrity and simplifying installation.
Implementation Method 1
A layer of conductive material, such as metal threads or needle-felt mats, placed inside the frame in contact with the cable screens to ground and dissipate electromagnetic interference
Implementation Method 2
The layer of conductive material is grounded and is placed in electrical contact with the cable screen of each cable received in the frame
Data Source
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AI summary
The present invention concerns a frame (1) for cable entries or pipe penetrations placed in a wall or other par tition and forming an opening through the wall or other partition. The frame (1) receives compressible modules (2) surrounding each cable (9) or pipe received in the frame (1). A barrier of modules (2), at least one compression unit (3) and possible stay plates (7) are placed at one end of the frame (1). A layer (8) of conductive material is placed inside the frame adjacent the barrier of modules (2), compression unit (3) and stay plates (7). The frame (1) is especially directed to damping of electromagnetic disturbances/EMI.