Cable Gland Gasket Ring Assembly Double-Lock Sealing
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Solution Overview
Problem
Existing cable gland designs fail to effectively prevent dust and water ingress into junction boxes due to inadequate sealing, deformation under external forces, and accidental dislodgment of rubber O-rings, leading to leakage and erosion of internal circuitry.
Innovation Solution
A cable gland and gasket ring assembly featuring a gasket ring with annular ribs and a convex portion, a connection ring with a stop flange and locating groove, and a packing ring with tapered surfaces and annular grooves, ensuring secure locking and protection against moisture and dust through a double-lock mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber O-ring or rubber pad is used as a water seal ring, then the cable gland can be assembled with the junction box, but the rubber seal tends to be stretched or excessively deformed under external forces, leading to insufficient leakage protection
Solution Approach 1:
The gasket ring is divided into multiple functional segments: an annular body with annular ribs on the first end face, and a separate convex portion on the second end face. This segmentation allows each part to perform its specific function - the ribs provide sealing contact while the convex portion provides positioning, preventing excessive deformation and maintaining reliable leakage protection.
Solution Approach 2:
Different parts of the gasket ring have different structural properties tailored to their functions. The annular ribs provide a sealing surface that contacts the stop face, while the convex portion provides positioning engagement. This local differentiation of structural quality ensures optimal performance for each function while maintaining overall stability.
2Object-affected harmful factors
If the rubber O-ring or rubber pad is sandwiched between planar wall surfaces, then the cable gland can be fastened to the junction box, but dust particles and water particles may fall from the surfaces to the inside of the junction box to erode the internal circuit structure
Solution Approach 1:
The gasket ring is pre-installed on the connection ring before assembly with the junction box, ensuring proper positioning and sealing contact is established in advance. This preliminary action prevents gaps or misalignment that could allow dust and water particles to enter the junction box during the fastening process.
Solution Approach 2:
The gasket ring acts as an intermediary sealing element between the connection ring and the junction box. Its annular ribs contact the stop face to create a barrier that prevents dust and water particles from passing through, while its structure ensures proper engagement without creating contamination pathways.
3Ease of operation
If the applied rotary force surpasses the pressure-bearing threshold of the rubber O-ring or rubber pad during fastening, then the cable gland can be threaded into the junction box, but the rubber seal may be forced out of position, causing leakage
Solution Approach 1:
The convex portion of the gasket ring is pre-positioned to engage with the recessed portion of the connection ring before fastening. This preliminary positioning action ensures the gasket ring remains correctly positioned during the fastening operation, even when rotary force exceeds the pressure-bearing threshold, preventing the seal from being forced out of position.
Solution Approach 2:
The convex portion of the gasket ring serves as an intermediary positioning element that engages with the recessed portion of the connection ring. This engagement acts as a mechanical constraint that maintains seal position stability during fastening operations, allowing ease of operation without compromising reliability.
4Ease of operation
If the rubber O-ring or rubber pad is used in the cable gland, then the cable gland can be delivered and installed, but the rubber seal may fall from the cable gland accidentally during delivery or installation
Solution Approach 1:
The convex portion of the gasket ring acts as an intermediary retention element that engages with the recessed portion of the connection ring. This engagement mechanism ensures the gasket ring remains securely attached to the cable gland during delivery and installation, preventing accidental dropout while maintaining ease of operation.
Solution Approach 2:
The gasket ring is pre-mounted on the connection ring with its convex portion engaging the recessed portion before the cable gland is delivered or installed. This preliminary attachment action ensures the gasket ring cannot fall off during handling, while still allowing smooth installation proceedings.
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 assembly provides foolproof installation, prevents leakage by maintaining a tight seal even under external forces, and ensures the gasket ring remains in place, effectively blocking dust and water particles from entering the junction box.
Implementation Method 1
the packing ring is forced to wrap about the cable tightly, thereby locking the cable and protecting against moisture
Implementation Method 2
effectively blocking dust and water particles from entering the junction box
Data Source
AI summary
A cable gland and gasket ring assembly includes a gasket ring and a cable gland formed of a shell, a collar, a packing ring and a connection ring for securing a cable to a junction box. The gasket ring is an annular member, having a first end face, a second end face opposing the first end face, a plurality of annular ribs concentrically arranged on the first end face and an annular convex portion located on the second end face, which is mounted on the first connection ring segment for enabling the annular ribs to be stopped against the stop face and a tapered inner surface located on the inside of the stop flange segment for stopping against a tapered outside surface of the packing ring. The packing ring further has at least one outer annular groove extending around the periphery of the second packing ring segment thereof.