Valve With Rotational Restriction Section Preventing Unintentional Closure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing valves in flow pipes, such as stop valves, require complex locking mechanisms for open and close positions, leading to reduced working efficiency and a risk of unintentional rotational movement from the open to the close position due to liquid pressure, which can result in reduced opening area or unintended closure.
Innovation Solution
A valve design featuring a cylindrical valve element with a flow-path hole and a holding member that allows rotational movement, including a rotational restriction section using a rotary plate and bolt combination to prevent unintentional closure by positioning the valve element's outer peripheral surface to receive pressure-induced rotational bias, maintaining the open position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bolt is used to lock the valve element in open/close positions, then the valve element position is reliably fixed, but the working efficiency is reduced due to repeated attachment/detachment operations
Solution Approach 1:
The valve element automatically locks in the open position through self-service mechanism: the liquid pressure acting on the specific part of the outer peripheral surface creates a rotational bias that maintains the open position without requiring external locking operations. The valve serves itself by using the flowing liquid's pressure to maintain its operational state.
Solution Approach 2:
The invention extracts the locking function from the operational cycle by providing a passive self-locking mechanism. The rotational bias mechanism takes out the need for active locking/unlocking operations, allowing the valve to maintain its open position automatically during fluid flow without requiring bolt attachment/detachment.
2Productivity
If the locking structure is simplified or omitted, then the working efficiency is improved, but the valve element may unintentionally rotate to reduce opening area or close the valve
Solution Approach 1:
The valve element uses the liquid pressure itself to maintain its open position through the rotational bias mechanism. The specific part of the outer peripheral surface receives liquid pressure that creates a stabilizing rotational bias, allowing the valve to self-maintain its operational state without external locking structures.
Solution Approach 2:
The invention converts the potentially harmful liquid pressure that could cause unintentional rotation into a beneficial force. By positioning the specific part of the outer peripheral surface to receive liquid pressure, the harmful pressure-induced rotation is transformed into a beneficial rotational bias that actively maintains the open position and prevents unintentional closure.
3Extent of automation
If liquid pressure acts on the valve element, then the valve operates automatically, but unintentional rotational movement from open to close position may occur
Solution Approach 1:
The invention applies local quality by creating an asymmetric pressure distribution on the valve element. The specific part of the outer peripheral surface is positioned to receive liquid pressure, creating a localized force that generates rotational bias in the opening direction. This asymmetric local pressure application prevents unintentional closure while maintaining automatic operation.
Solution Approach 2:
The liquid pressure that could potentially cause unintentional rotation is converted into a beneficial force. The rotational bias mechanism uses the liquid pressure acting on the specific part of the outer peripheral surface to actively maintain the open position, transforming the potential harm into automatic position stabilization.
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 valve effectively suppresses unintentional rotational movement from the open to the close position, ensuring reliable operation without complicating the structure, thus maintaining the flow path's openness and preventing unintended closure.
Implementation Method 1
the specific part lying at a rear side of the flow-path hole with respect to the first direction so as to receive pressure of the liquid having passed through the inlet port to allow the pressure to impart a rotational bias in the first direction to the valve element in the open position
Data Source
Figure 1
Figure 2A~2B
Figure 3~4
AI summary
Provided is a valve (10) restrained from unintentional close. The valve (10) includes a valve element (11) formed with a flow-path hole (13), a holding member (12) having inlet and outlet ports (18A, 18B) and holding the valve element (11) while permitting its rotational movement in first and second directions, and a rotational restriction section. The valve element (11) has an open position for making communication between the ports (18A and 18B) through the flow-path hole (13) and a close position for blocking between the ports (18A and 18B). The rotational restriction section restricts the rotational movement so as to stop the rotational movement thereof in the first direction at the open position where a specific part (14) of the outer peripheral surface (14) of the valve element (11) overlaps the inlet port (18) and receives pressure of the liquid to allow the pressure to impart a rotational bias in the first direction to the valve element (11) in the open position.