Fire Protection Sleeve With Hook Closure Clip
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Solution Overview
Problem
Fire protection sleeves with integrated closure elements become expensive to manufacture and cannot be easily shortened or adapted to different lengths, as they require additional anchoring elements for secure fixation and sealing, which complicates on-site assembly and increases material costs.
Innovation Solution
A fire protection sleeve design featuring a carrier strip with recesses on its outer surface and a closure clip with hooks that engage these recesses, allowing for easy cutting and rolling of the sleeve, and secure closure independent of length or diameter, with the clip absorbing shearing stress and enabling the use of thinner materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If integrated closure elements are provided on the carrier strip, then secure fixation and anchoring is ensured, but manufacturing cost increases substantially and the carrier strip cannot be shortened as desired
Solution Approach 1:
The closure function is segmented from the carrier strip by using separate closure clips that attach to the carrier strip through hooks engaging with recesses. This allows the carrier strip to be manufactured simply as a continuous strip without integrated closure elements, reducing manufacturing cost while maintaining secure fixation through the separate closure clips.
Solution Approach 2:
The closure elements are extracted from the carrier strip and implemented as separate closure clips. The carrier strip only contains simple recesses, while the closure function is performed by the detachable clips with hooks, thereby simplifying carrier strip manufacturing and enabling easy shortening.
2Reliability
If integrated closure elements are provided on the carrier strip, then secure fixation is ensured, but additional anchoring elements are required and assembly becomes more complex
Solution Approach 1:
The closure clip combines multiple functions into a single element: the hooks provide anchoring to the carrier strip, the body provides the closure mechanism, and the overall structure serves as the anchoring element for the breakthrough. This merging eliminates the need for separate anchoring elements and simplifies assembly.
Solution Approach 2:
The closure clip is designed as a multi-functional element that simultaneously provides closure, anchoring, and positioning functions. The hooks engage with recesses on the carrier strip while also serving as anchoring points, making the closure clip a universal component that replaces multiple separate elements.
3Strength
If the carrier strip is made thicker to provide structural strength, then strength is improved, but flexibility decreases and trimming to desired length becomes more difficult
Solution Approach 1:
The carrier strip is designed with non-uniform thickness or local reinforcement only where structurally necessary, while maintaining thinness and flexibility in the main body for easy handling and trimming. The local quality principle allows the strip to have sufficient strength at critical points without compromising overall flexibility.
Solution Approach 2:
The carrier strip may use composite material structures that provide high strength-to-weight ratio, enabling the strip to be thin and flexible yet sufficiently strong. Composite materials allow achieving both strength and flexibility simultaneously by combining different material properties.
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 reduces manufacturing costs by eliminating the need for additional anchoring elements and allows for precise adaptation and easier handling, as the carrier strip can be cut to any length without weakened zones, while ensuring secure sealing and flexibility during intumescent expansion.
Implementation Method 1
a closure clip made of a sheet, which has at least two hooks that are able to engage in the recesses
Implementation Method 2
an intumescent overlay that expands under the influence of heat and seals the breakthrough
Implementation Method 3
The hooks are bent, for example, in a final assembly position at an acute angle to the base body
Data Source
AI summary
A fire protection sleeve is disclosed. The fire protection sleeve has a carrier strip and an intumescent overlay, which runs on an inner surface along the carrier strip and is connected thereto. A plurality of recesses spaced apart from one another in a longitudinal direction are provided on the outer side of the carrier strip facing away from the intumescent overlay. The fire protection sleeve also has a closure clip, made in particular of a sheet, wherein the closure clip has at least two hooks that are able to engage in the recesses.