Shut-off Valve Segmented Elastic-Rigid Design
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Solution Overview
Problem
Conventional shut-off valves in gas fired boilers require a strong electromagnetic valve opening means to overcome the elastic force of a compression spring and fluid pressure, leading to increased size and cost due to the large diameter of the valve body portion on the fluid inlet side.
Innovation Solution
A shut-off valve design featuring a valve seat with two portions of different diameters and a valve body composed of separable, superimposed parts where the first valve body portion is elastic and the second is rigid, with a through-hole for the operating shaft and mechanisms to delay the opening operation, allowing the electromagnetic force to be derived from the smaller pressure reception area of the second valve body portion, reducing the size and cost of the electromagnetic opening means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve body has a large diameter on the fluid inlet side to ensure proper sealing contact area, then the sealing performance is improved, but the electromagnetic valve opening means requires stronger attracting force resulting in increased size and cost
Solution Approach 1:
The valve body is divided into two separate portions: a first valve body portion with large diameter for sealing contact with the first valve seat portion, and a second valve body portion with small diameter for contact with the second valve seat portion. This segmentation allows the electromagnetic valve opening means to act only on the smaller second portion, reducing the required attracting force while maintaining effective sealing through the larger first portion.
Solution Approach 2:
A valve body separating means is introduced as an intermediary mechanism between the electromagnetic valve opening means and the valve body. This means delays the separation action, allowing the electromagnetic force to first overcome the spring force and then gradually separate the valve body portions, reducing the peak force requirement.
2Power
If the electromagnetic valve opening means is made larger to provide sufficient attracting force for the large diameter valve body, then the valve opening capability is improved, but the device cost and size increase
Solution Approach 1:
By segmenting the valve body into two portions with different diameters, the invention reduces the area on which the electromagnetic force must act. The electromagnetic valve opening means only needs to provide sufficient force to move the smaller second valve body portion, significantly reducing its size and cost requirements while maintaining effective valve opening capability.
3Ease of manufacture
If the valve body is composed of a single large diameter portion to simplify structure, then the manufacturing is easier, but the electromagnetic valve opening means requires stronger force resulting in increased cost
Solution Approach 1:
The valve body is segmented into two portions that can be manufactured separately and then assembled. The first valve body portion with large diameter can be manufactured to standard specifications, and the second valve body portion with small diameter can also be manufactured independently. This segmentation actually simplifies the manufacturing of the electromagnetic valve opening means, as it only needs to accommodate the smaller second portion.
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 enables valve opening with a smaller force requirement, reducing the size and cost of the electromagnetic valve opening means while maintaining effective seal performance and stability, and ensuring safety through dual-stage sealing and pressure monitoring.
Implementation Method 1
the first valve body portion is formed of an elastic material... the central portion of the first valve body portion is moved away from the second valve body portion
Implementation Method 2
a valve body... connected to electromagnetic valve opening means... is separated from the valve seat by the electromagnetic opening/closing means
Implementation Method 3
a compression spring to be brought into contact with the valve seat
Data Source
AI summary
A cutoff valve having an upstream valve part and a downstream valve part which are assembled in series in a flow passage. Each of the valve elements at the valve parts are formed separably stacking a large diameter first valve element and a small diameter second valve element on each other. The first valve element is formed of elastic material and the second valve element is formed of rigid material. A valve shaft is passed through the center of the first valve element, and the tip of the valve shaft is connected to the second valve element. A first valve element moving component which moves the center part of the first valve element in a direction apart from the second valve element in the state of being engaged with the first valve element when the valve is opened is installed between the first valve element and the valve shaft.