EMC Wedge Seal Structure for Shielded Cable And Pipe Transits
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Solution Overview
Problem
Existing wedge seals fail to provide a cost-effective and easy-to-manufacture solution for creating a watertight, gas-tight, flame-retardant seal with electromagnetic shielding for cable and pipe passages, as they either allow electromagnetic waves to pass through or require expensive and complex stationary metal frames.
Innovation Solution
A wedge seal design featuring two wedge-shaped pressure members and tension members connected by screw elements, with an EMC seal comprising a metal layer and sealing layout that forms a complete electromagnetic barrier when tensioned, allowing for simpler frame designs and efficient space use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional wedge seal without EMC seal is used, then the structure is simple and manufacturing cost is low, but electromagnetic waves can pass through the wedge seal
Solution Approach 1:
The EMC seal integrates the electromagnetic shielding function with the existing wedge seal structure by combining a metal layer and sealing layout into the wedge-shaped pressure members and tension members. This merging approach adds electromagnetic shielding capability without requiring a completely separate shielding system, thus improving reliability while limiting the increase in device complexity.
Solution Approach 2:
The metal layer and sealing layout are applied specifically to the surfaces of the wedge-shaped pressure members and tension members that require electromagnetic shielding. This localized application of EMC seal material provides targeted electromagnetic protection where needed, rather than requiring complete shielding of the entire wedge seal assembly.
2Reliability
If an elaborate stationary metal frame with electromagnetic shielding is used, then electromagnetic shielding is achieved, but the frame is costly, space consuming and heavy
Solution Approach 1:
The electromagnetic shielding function is extracted from the heavy stationary metal frame and transferred to the movable wedge-shaped pressure members and tension members. By applying the EMC seal directly to these components, the system achieves electromagnetic shielding without requiring the elaborate, heavy frame structure, thus reducing weight while maintaining shielding capability.
Solution Approach 2:
The EMC seal uses thin metal layers and sealing layouts instead of thick, heavy metal frame structures. These thin film-like EMC seal layers provide electromagnetic shielding functionality with minimal weight addition, replacing the need for bulky stationary shielding frames.
3Reliability
If surface coating of electrically conductive material is applied to form electromagnetic barrier, then electromagnetic shielding is achieved, but it is expensive and not ideal for rough everyday use
Solution Approach 1:
The EMC seal combines metal layers with sealing layout materials to create a composite structure that provides both electromagnetic shielding and sealing functions. This composite approach integrates multiple functions into a single component system, simplifying manufacturing compared to separate coating processes while maintaining shielding effectiveness.
Solution Approach 2:
The electromagnetic shielding function is merged with the mechanical sealing and compression functions of the wedge seal components. The metal layer and sealing layout are integrated into the wedge-shaped pressure members and tension members, creating a multi-functional component that eliminates the need for separate surface coating processes.
4Reliability
If modular fitting modules with closed shielding wall are used, then watertight, gas-tight and flame-retardant separation is achieved with electromagnetic shielding, but production is costly and requires elaborate stationary metal frame
Solution Approach 1:
The wedge-shaped pressure members and tension members with integrated EMC seal serve multiple functions simultaneously: mechanical compression, sealing, and electromagnetic shielding. This multi-functionality eliminates the need for separate modular fitting modules and elaborate stationary metal frames, simplifying manufacturing while maintaining all required performance characteristics.
Solution Approach 2:
The sealing layout and electromagnetic shielding functions are merged into the wedge seal components themselves. The metal layer and sealing layout are integrated into the pressure members and tension members, creating a unified component system that provides both sealing and electromagnetic shielding without requiring separate modular assemblies.
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 provides a cost-effective, easy-to-install, and durable watertight, gas-tight, flame-retardant seal with comprehensive electromagnetic shielding, enhancing the integrity of cable and pipe passages while reducing material costs and complexity.
Implementation Method 1
the pressure members are connected with each other by means of spring force
Implementation Method 2
the tension members are connected to each other with at least one screw element in such a way that they can be moved towards or away from each other by turning the screw element
Implementation Method 3
the pressure members are moved away from each other in direction P against the spring force when the tension members are moved towards each other by means of the screw element
Data Source
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AI summary
The invention relates to a wedge seal (10) for electromagnetic shielded cable and pipe transits for sealing a cable and/or pipe passage (100), the wedge seal (10) comprising two wedge-shaped pressure members (20), a wedge-shaped front tension member (30) and a wedge-shaped rear tension member (40), the wedge-shaped pressure members (20) and the wedge-shaped tension members (30, 40) each having a wide base side (21, 31, 41) and an opposite narrow tip side (22, 32, 42), wherein the tension members (30, 40) are connected to each other with at least one screw element (50) in such a way that they can be moved towards or away from each other by turning the screw element (50) wherein the pressure members (20) are held against each other by means of spring force and wherein the tension members (30, 40) are arranged between the pressure members (20) in such a way that the pressure members (20) can be moved towards or away from each other by turning the screw element (50), wherein the pressure members (20) are moved away from each other in direction P against the spring force when the tension members (30, 40) are moved towards each other by means of the screw element (50), and wherein the pressure members (20) are moved towards each other in direction S in-line with the spring force when the tension members (30, 40) are moved away from each other by means of the screw element (50). The wedge seal (10) comprises at least one EMC seal, wherein the EMC seal comprises a sealing layout (60) and metal layer (70), which covers the pressure members (20) at least partly.