Valve Device Rotating Support Member Prevents Sudden Actuation
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Solution Overview
Problem
Existing valve devices fail to reliably prevent sudden actuation due to sudden increases in fluid pressure, leading to operational instability and potential leakage, and often require precise operation to maintain the closed state.
Innovation Solution
A valve device incorporating a threaded member with a female thread on its inner surface and a male thread on the actuator, combined with a biasing member like a coil spring and disc springs, which requires a large exertion force to operate, ensuring the valve remains closed even under increased pressure and preventing accidental opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional valve device is used, then the valve can open and close the fluid path, but the valve cannot reliably prevent sudden actuation due to sudden increases in fluid pressure
Solution Approach 1:
The patent applies preliminary anti-action by pre-configuring a threaded member with sufficient frictional engagement to counteract potential sudden pressure increases before they can cause accidental valve opening. The threaded connection is designed with intentional friction characteristics that create resistance to unintended actuation while still allowing controlled operation when properly initiated.
Solution Approach 2:
The patent implements beforehand cushioning by designing the threaded member engagement to absorb and dissipate sudden pressure surges through frictional forces. The mechanical friction in the threaded connection acts as a cushioning mechanism that prevents direct transmission of pressure spikes to the valve actuating mechanism, thereby maintaining closure reliability during transient pressure conditions.
2Reliability
If the valve requires precise operation to maintain closed state, then leakage can be prevented, but operational complexity increases and safety decreases
Solution Approach 1:
The patent applies self-service by designing the threaded member to automatically maintain valve closure through its inherent friction characteristics. The frictional engagement in the threaded connection self-regulates to prevent leakage without requiring precise manual operation or complex control mechanisms. The system essentially services itself by using the friction in the threaded engagement to maintain the closed state and prevent leakage.
3Ease of operation
If the actuator is easily operated, then usability improves, but the valve becomes susceptible to accidental opening under pressure
Solution Approach 1:
The patent applies parameter changes by carefully selecting and optimizing the friction characteristics of the threaded member engagement. The friction coefficient and engagement parameters are chosen to create a threshold effect: the friction is sufficient to prevent accidental opening under normal pressure conditions, but can be overcome when deliberate actuation force is applied. This creates a bimodal operational characteristic that distinguishes between accidental and intentional actuation.
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 enhances operability by ensuring the valve remains closed under high pressure conditions, minimizing leakage and accidental operation, while allowing smooth conversion of rotational motion into linear motion for precise control, thus improving the valve's reliability and safety.
Implementation Method 1
a threaded member (18) which is screwed into the actuator (14, 15, 14a, 14b, 14c)
Implementation Method 2
the actuator (14, 15, 14a, 14b, 14c) is biased by a biasing member in a direction from the open position of the valve to the closed position
Data Source
AI summary
A valve device which improves the operability of a valve for opening and closing a flow path. The valve device includes a valve, an actuator, an actuator support member, an operating portion, and a threaded member wherein the valve is able to open and close a fluid path in a valve body having a fluid inflow passage and a fluid outflow passage. The actuator displaces the valve between an open position and a closed position. The actuator support member operatively supports the actuator so that the actuator is able to be driven. The operating portion drives the actuator. The threaded member is threadedly engaged with the actuator.