Gas Valve Plastic Overpressure Safety Sheet
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Solution Overview
Problem
Conventional gas valve units face issues with the shut-off element deformation due to excessive force, leading to impaired function and inadequate magnetic force to maintain the open position, and springs used as overpressure safety devices result in pressure drops and high design requirements.
Innovation Solution
A gas valve unit with a plastic sheet designed as an overpressure safety device, which buckles at high compressive forces to prevent damage and automatically reverts, allowing for efficient gas flow and reduced pressure loss, while maintaining the shut-off valve open with a magnet unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring is used as an overpressure protection device in the connecting element, then the shut-off valve can be protected from excessive force, but the spring occupies space that reduces the gas flow area and causes pressure drop
Solution Approach 1:
The invention removes the spring from the connecting element, extracting the overpressure protection function from a mechanical spring-based system. This eliminates the space occupation and pressure drop issues while maintaining protection functionality through alternative design of the connecting element itself.
Solution Approach 2:
The invention replaces the mechanical spring-based overpressure protection system with a redesigned connecting element that inherently limits force transmission. This substitution eliminates the need for a separate spring component and its associated negative effects on gas flow.
2Stability of the object's composition
If the connecting element is made very stiff to prevent deformation during operation, then the shut-off valve function is maintained, but excessive force can still deform the armature plate surface when pressed with too much force
Solution Approach 1:
The invention changes the mechanical parameters of the connecting element by optimizing its geometry and material properties to achieve an ideal stiffness range. This allows the element to be sufficiently stable during normal operation while inherently limiting the maximum force transmitted to the armature plate, preventing surface deformation.
3Stability of the object's composition
If the spring stiffness is increased to reduce deformation during operation, then the connecting element maintains its function, but the design requirements become excessively high and complex
Solution Approach 1:
The invention extracts the overpressure protection function from a complex spring system and integrates it directly into the connecting element design. This simplification eliminates the need for high-stiffness spring design while maintaining operational stability through optimized connecting element geometry.
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 plastic sheet ensures reliable long-term functioning of the shut-off valve, prevents component damage, and minimizes pressure loss, offering a cost-effective and space-efficient solution compared to traditional spring-based designs.
Implementation Method 1
The solenoid unit usually contains a wound coil connected to a thermocouple located near a gas burner. The electrical voltage generated by the thermocouple causes a current to flow through the coil of the solenoid unit, thus generating a magnetic force that holds the shut-off valve open
Implementation Method 2
The plastic arc has a first radius when a pressure force acting on the plastic arc is less than or equal to a predetermined limit value. Correspondingly, the plastic arc has a second radius when the pressure force acting on the plastic arc is greater than the predetermined limit value
Data Source
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AI summary
The invention relates to a gas value unit for controlling gas throughput guided to a gas burner of a gas device, in particular a gas cooking appliance. Said gas valve unit comprises a valve housing and an actuation shaft for controlling an opening cross-section of the gas valve unit and an additional stop valve. A movement of the actuation shaft by means of a linearly displaceable connecting element can be transmitted to the stop valve. Said connecting element comprises a plastic bend designed as overpressure protection.