Cable Gland Sealing Area Relocation for Leak Prevention
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Solution Overview
Problem
Existing cable gland devices face issues with maintaining a seal between the base body and the clamping device over their service life, leading to potential leaks due to deformation and material relaxation, which increases costs and reduces sealing effectiveness.
Innovation Solution
The relocation of the sealing area to a hollow-cylindrical free end of the clamping device, away from the clamping area, forms a double seal with coaxially extending sealing areas at different distances from the longitudinal axis, reducing deformation impact and eliminating the need for additional counter-seals, thus ensuring a durable and cost-effective seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing area is positioned close to the clamping area to ensure effective sealing, then sealing effectiveness is improved, but deformation and material relaxation cause leaks over service life
Solution Approach 1:
The invention divides the sealing function into two separate sealing areas: a first sealing area close to the clamping area that handles immediate sealing requirements, and a second sealing area further away that provides long-term sealing stability. This segmentation allows each sealing area to serve its specific function without being compromised by deformation in the other region, thereby maintaining sealing effectiveness throughout the service life.
Solution Approach 2:
The invention extends the sealing solution from a single radial sealing area to multiple sealing areas at different axial positions along the longitudinal axis. By adding the axial dimension to the sealing strategy, the device creates a distributed sealing system where the first sealing area (at greater distance from longitudinal axis) and second sealing area (at smaller distance) work together to maintain seals despite deformation and relaxation over time.
2Reliability
If a counter-seal is added to prevent surface layer flaking and maintain seal, then sealing reliability is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The invention merges the sealing function with the existing clamping device structure by utilizing the hollow-cylindrical free end as the second sealing area. Instead of adding a separate counter-seal component, the solution integrates the sealing functionality directly into the clamping device's geometry, thereby improving sealing reliability without increasing device complexity or requiring additional components.
Solution Approach 2:
The hollow-cylindrical free end of the clamping device serves multiple functions: it provides the clamping action on the line and simultaneously creates the second sealing area against the base body. This multi-functionality eliminates the need for separate counter-seal components while maintaining sealing reliability throughout the device's service life.
3Strength
If the clamping area is compressed radially to secure the line, then clamping effectiveness is improved, but the sealing geometry between clamping device and base body is disrupted
Solution Approach 1:
By separating the clamping area from the sealing areas axially, the invention ensures that radial compression forces applied to the clamping area do not directly affect the sealing geometry. The first and second sealing areas are positioned such that deformation in the clamping region is isolated and does not compromise the sealing contact between the clamping device and base body.
Solution Approach 2:
The hollow-cylindrical structure of the clamping device acts as an intermediary that transmits the radial clamping forces to the line while protecting the sealing areas from direct deformation. The structural design allows the clamping area to deform radially for effective line securing while the sealing areas maintain their geometric integrity through the protective hollow-cylindrical configuration.
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
This design enhances the sealing effectiveness by preventing deformation-induced leaks, maintaining functionality through redundancy, and compensating for material relaxation and temperature fluctuations, while reducing manufacturing and assembly complexities.
Implementation Method 1
the clamping device is pressed axially via a component into a recess of the base body, forming at least one sealing area
Implementation Method 2
at least one seal can also be provided, which seals the line against moisture, splash water in the housing and dust
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a device for fastening a conduit (1) with a base body (2), with a clamping device (3) and with a union nut (4), wherein the union nut (4) in the operating state exerts force on the clamping device (3) radially to the longitudinal axis (A) of the device with orientation towards the conduit (1) and in the direction of the longitudinal axis (A) with orientation towards the base body (2) such that the clamping device (3) is pressed radially onto the conduit (1) via its clamping area (7) and axially pressed via a component into a recess (12) of the base body, forming at least one sealing area (18, 19, 20), which maintains the seal between the base body and the clamping device in a cost-effective manner over the lifetime of the device by the fact that the component of the clamping device (3) cooperating with the recess (12) of the base body (2) is the free end (13) facing away from its clamping area (7).