Excess Flow Valve Push-Rod Reset for Leak-Safe Shut-Off
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Solution Overview
Problem
Conventional excess flow valves require professional assistance to reset after activation, leading to potential gas leakage due to improper operation during release.
Innovation Solution
An excess flow valve with a self-resetting function, featuring a resetting device with a push rod that allows users to easily release the obstruction without disassembly, using a magnetically attracted flow-stopping component and a push rod mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the excess flow valve uses a conventional shut-off mechanism, then the valve can effectively block fluid flow when activated, but the valve cannot be reset without removal from the gas storage device
Solution Approach 1:
The patent implements a self-service mechanism by enabling the valve to be reset by the user through simple manual operation of the push rod, eliminating the need for professional assistance or device removal. The resetting device allows the flow-stopping component to be returned to its original position through user-applied force on the push rod.
2Reliability
If the valve requires professional assistance for resetting, then the shut-off mechanism remains reliable, but gas leakage risk increases due to improper operation
Solution Approach 1:
By enabling users to safely reset the valve themselves through the designed push rod mechanism, the patent eliminates the harmful factor of gas leakage that arises when professionals are required. The self-service design includes clear operational guidance through the mechanical structure, reducing the risk of improper operation.
3Ease of repair
If the valve is removed from the gas storage device for resetting, then the blockage can be released, but the operation becomes troublesome and time-consuming
Solution Approach 1:
The patent resolves the time loss issue by implementing a self-service resetting mechanism that allows the valve to be reset in-situ without removal from the gas storage device. The push rod provides direct access to the flow-stopping component, enabling quick resetting operations while the valve remains installed.
4Ease of operation
If a resetting device with push rod is installed, then user-operated resetting becomes possible, but the device complexity increases
Solution Approach 1:
The patent introduces a push rod as an intermediary element that connects the user's external force to the internal flow-stopping component. This simple mechanical intermediary enables user operation without requiring complex control systems, electronics, or multiple moving parts, thus minimizing the increase in device complexity.
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
Enables easy and safe resetting of the valve by users, preventing gas leakage and eliminating the need for professional intervention.
Implementation Method 1
a flow-stopping component (31) which blocks the outlet port (111) when subjected to fluid pressure exceeding a set limit
Implementation Method 2
The set limit mentioned earlier is determined by the strength of the magnet (32)
Data Source
AI summary
An excess flow valve includes a valve body including an inlet, an outlet, and a pressure relief portion. The inlet includes an outlet port. A pressure relief valve is positioned in the pressure relief portion. A resetting device is installed within the pressure relief valve, and includes a push rod. An excess flow device is installed within the inlet and includes a flow-stopping component which blocks the outlet port when subjected to fluid pressure exceeding a set limit. When the push rod is moved by a force, one end of the push rod moves toward a position where the flow-stopping component blocks the outlet port. After abnormal exclusion, simply operating the push rod to move the flow-stopping component to release the obstruction. Users can easily release the obstruction of the excess flow device to the fluid by operating the resetting device.