Fluid Sealing Device for Power Cable Longitudinal Displacement
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Solution Overview
Problem
Existing fluid sealing devices for installation pipes fail to maintain a seal when long objects, such as power cables, undergo significant longitudinal displacement, leading to potential leaks and damage to the sealing members.
Innovation Solution
A fluid sealing device comprising a flange with a stop face at an angle to its hole, sealing members on the long object that exert an urging force towards the axial center, and a clamping member to press these sealing members against the stop face, allowing the long object to slide while maintaining the seal, even with large displacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a waterproof sealing agent is used to secure the cable and sleeve to each other, then the cable and sleeve are firmly fixed, but the sealing agent stiffens over time and may break when the cable is displaced by a large amount in the longitudinal direction, resulting in failure to seal the pipe opening
Solution Approach 1:
The patent changes the physical state of the sealing material from a stiffening agent (waterproof sealing agent that hardens over time) to a fluid sealing member that maintains its fluidity. This parameter change allows the sealing member to continuously adapt to cable displacement while maintaining sealing effectiveness, resolving the contradiction between initial sealing strength and long-term reliability under displacement conditions.
Solution Approach 2:
The patent introduces a dynamic sealing mechanism where the fluid sealing member can move and deform in response to cable displacement. Unlike the static waterproof sealing agent that breaks when the cable moves, the fluid sealing member dynamically adjusts its position and shape to maintain the seal, ensuring reliability under varying cable positions.
2Strength
If a rigid waterproof sealing agent is used to seal the pipe opening, then the seal is initially strong, but it cannot accommodate large longitudinal displacement of the cable, leading to seal failure
Solution Approach 1:
The patent changes the physical parameter of the sealing material from rigid to fluid state. The fluid sealing member maintains its fluidity to accommodate cable displacement while still providing effective sealing, thus resolving the contradiction between initial sealing strength and adaptability to displacement.
Solution Approach 2:
The patent uses a fluid sealing member that acts as a flexible sealing element. This fluid member can deform and move with the cable displacement, providing both the necessary sealing strength and the adaptability to accommodate large longitudinal movements of the cable.
3Reliability
If the sealing member is compressed in the axial direction to exert urging force toward the axial center, then the seal between the flange and long object is maintained, but the long object needs to be able to slide while maintaining the seal
Solution Approach 1:
The patent uses a fluid sealing member whose fluidity parameter allows it to be compressed axially to maintain sealing while simultaneously allowing the long object to slide. The fluid nature enables the sealing member to deform under compression without creating excessive friction that would prevent sliding, thus resolving the contradiction between seal maintenance and sliding capability.
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 enables reliable sealing of the installation pipe opening during longitudinal movement of the long object, reducing the risk of damage to the sealing members and preventing leaks, even under excessive pressure, thus ensuring effective sealing and protection against corrosion.
Implementation Method 1
one or more sealing members configured to be disposed on an outer periphery of the long object and configured to exert an urging force toward an axial center of the long object upon being compressed in an axial direction of the long object
Implementation Method 2
one or more sealing members configured to be disposed on an outer periphery of the long object and configured to exert an urging force toward an axial center of the long object upon being compressed in an axial direction of the long object
Data Source
AI summary
A fluid sealing device for sealing an opening of an installation pipe in which at least a long object is installed includes: a flange configured to close the opening of the installation pipe, the flange having a hole through which the long object is made to pass, and the flange having a stop face that is continuous with and at an angle to an inner surface of the hole; one or more sealing members configured to be disposed on an outer periphery of the long object and configured to exert an urging force toward an axial center of the long object upon being compressed in an axial direction of the long object, thereby sealing a gap between the flange and the long object; and a clamping member configured to press the one or more sealing members toward the stop face.