Graphite Rupture Disc Fastening for High-Temperature Pressure Relief

Solution Overview

Problem

Existing pressure relief devices face limitations in high-temperature applications and chemically aggressive environments due to adhesive material limitations, which can lead to unintended bursting and contamination.

Innovation Solution

A pressure relief device with a graphite rupture disc and vacuum support, featuring a form-fitted carbon retaining device for secure fastening without adhesives, allowing operation up to 500°C in oxidative and 1400°C in inert atmospheres, and being free of contaminants.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If adhesive material is used to fasten the vacuum support in the recess, then the vacuum support can be securely fastened, but the device is limited to lower application temperatures and the adhesive may dissolve or contaminate the installation

Engineering Contradiction:

Improvesecure fastening of vacuum supportVSAvoidapplication temperature limit

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The adhesive material is completely removed from the device. Instead of using adhesive to fasten the vacuum support, the patent uses a form-fitted connection where the vacuum support has a projection that fits into a corresponding recess in the diaphragm, eliminating the adhesive entirely and thus removing temperature and chemical composition limitations.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The chemical bonding mechanism (adhesive) is replaced with a mechanical bonding mechanism (form-fitted connection). The projection on the vacuum support fits into the recess in the diaphragm, creating a mechanical interlock that does not depend on temperature or chemical resistance of adhesives.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If adhesive material is used to fasten the vacuum support, then the vacuum support can be secured in position, but adhesive components may dissolve and contaminate the installation

Engineering Contradiction:

Improvesecure fastening of vacuum supportVSAvoidcontamination from adhesive

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The adhesive material is completely removed from the device. Instead of using adhesive to fasten the vacuum support, the patent uses a form-fitted connection where the vacuum support has a projection that fits into a corresponding recess in the diaphragm, eliminating the adhesive entirely and thus removing temperature and chemical composition limitations.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The chemical bonding mechanism (adhesive) is replaced with a mechanical bonding mechanism (form-fitted connection). The projection on the vacuum support fits into the recess in the diaphragm, creating a mechanical interlock that does not depend on temperature or chemical resistance of adhesives.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If a one-piece design of vacuum support with membrane is attempted, then the structure is simplified, but the burst pressure cannot be exactly defined

Engineering Contradiction:

Improvestructural simplicityVSAvoidburst pressure definition

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The device is divided into separate functional components: the diaphragm with its recess and the vacuum support with its projection. This segmentation allows the membrane to be precisely designed for burst pressure while the vacuum support is separately designed for structural support, combining simplicity with precision.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11359737B2Pressure relief device and method for its production

Publication Date: 2022.06.14 SCHUNK KOHLENSTEOFFTECHNIK GMBH

AI summary

The invention relates to a pressure relief device and to a method for producing a pressure relief device, the pressure relief device (10) comprising a rupture disc (11) and a vacuum support (12, 32), the rupture disc and the vacuum support being made of graphite, the one-piece rupture disc having an exit side (13) and an entry side (14), the rupture disc having a recess (15) on the entry side, said recess (15, 33) forming a rupture area (17) within a retainer (16) of the rupture disc, the vacuum support being inserted in the recess, the pressure relief device having a carbon retaining device (30) for a form-fitted fastening of the vacuum support in the recess.