Explosive Forming Fluid Valve Decoupling

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Solution Overview

Problem

Existing devices for explosive forming face challenges in maintaining good sealing and fluid filling during the explosive process while being protected from the direct effects of detonation, requiring a design that balances mechanical decoupling and force transfer effectively.

Innovation Solution

A device with extensive mechanical decoupling of the activating mechanism from the valve, using a movable valve element with a valve tappet, and a pressure chamber with multiple fluid connections for efficient gas mixing, along with a modular valve housing and low-sparking materials for enhanced sealing, allows for effective fluid supply and protection from detonation forces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If the activating mechanism is mechanically coupled to the valve, then force transfer is improved, but the valve is exposed to high forces and pressures during explosion

Engineering Contradiction:

Improveforce transferVSAvoidexposure to detonation forces

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

A fluid intermediary (gas or liquid) is introduced between the activating mechanism and the valve. The fluid transmits the activating force to the valve while allowing the mechanism to remain mechanically decoupled, thus protecting it from explosion forces while maintaining force transfer capability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The direct mechanical connection between the activating mechanism and the valve is removed. The mechanism is extracted from the high-stress explosion environment, with only the essential force transmission function remaining through fluid pressure.

Inventive Principle:

Principle #2Taking out (Extraction)

2Object-affected harmful factors

If the activating mechanism is extensively decoupled from the valve, then protection from explosion forces is improved, but force transfer becomes insufficient

Engineering Contradiction:

Improveprotection from detonation forcesVSAvoidforce transfer

Core Design Contradiction:

Object-affected harmful factorsVSForce

Solution Approach 1:

Fluid pressure (pneumatics or hydraulics) is used to transmit force from the activating mechanism to the valve. This allows extensive mechanical decoupling while maintaining effective force transfer through the incompressible or compressible fluid medium.

Inventive Principle:

Principle #29Pneumatics and hydraulics

3Weight of moving object

If the valve element has large mass, then it can withstand explosion forces better, but sealing performance deteriorates

Engineering Contradiction:

Improvevalve element massVSAvoidsealing performance

Core Design Contradiction:

Weight of moving objectVSReliability

Solution Approach 1:

The mass parameter of the valve element is optimized to a smaller value. Compensation for the reduced inertia is achieved through the fluid-coupled activating mechanism that can apply controlled forces independently of the valve's mass.

Inventive Principle:

Principle #35Parameter changes

4Adaptability or versatility

If multiple fluid connections are added to the pressure chamber, then fluid mixing capability is improved, but device complexity increases

Engineering Contradiction:

Improvefluid mixing capabilityVSAvoidnumber of fluid connections

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The pressure chamber with multiple fluid connections serves multiple functions: it can mix different gases (oxygen, hydrogen, inert gases), control fluid flow to the valve, and provide pressure regulation. This multi-functionality justifies the increased complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 achieves reduced cycle times, improved sealing, and increased safety during explosive forming by decoupling the activating mechanism from the valve, ensuring reliable fluid supply and protection from high forces and pressures.

Implementation Method 1

the activating mechanism can be held in a rest position by an elastic element, in which the valve is in the inactivated state

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

the activating mechanism can be brought into a working position by pressurization with a fluid, in which the valve is in an activated state

Methodology Applied

Scientific EffectPressure: Pressure Increase

Implementation Method 3

By igniting the explosive gas in the explosive forming die, a detonation front is formed that propagates along the die

Methodology Applied

Scientific EffectDetonation: Detonation

Data Source

PatentUS8939743B2Device for supplying a fluid for explosion forming

Publication Date: 2015.01.27 COSMA ENG EURO AG

AI summary

With the invention, a device for fluid feed for explosive forming, which has a valve and an activating mechanism to activate the valve, is to be improved, so that the device permits both good filling of a die with fluid and good sealing during the explosive forming process in a technically simple design. This task is solved by a device for fluid feed for explosive forming that has a valve and an activating mechanism to activate the valve, in which the activating mechanism is arranged separate from the valve in an inactivated valve state.