Compressor Gas Cutoff Using a Pressure-Actuated Stop Plunger
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Solution Overview
Problem
Existing air compressors lack an efficient mechanism to prevent gas or liquid exposure during compressor failure or malfunction, which can lead to safety hazards, especially when handling dangerous gases or liquids.
Innovation Solution
A mechanism featuring a stop plunger that separates two input chambers, maintaining equal pressure during normal operation and moving to block gas or liquid flow when pressure differential occurs due to compressor failure, thereby preventing exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stop plunger system is added to prevent gas or liquid leakage during compressor failure, then safety and environmental protection are improved, but device complexity increases
Solution Approach 1:
The stop plunger system operates automatically based on pressure differential without requiring external control systems. During normal operation, equal pressure on both sides of the plunger keeps it in the open position. Upon compressor failure, the pressure differential automatically moves the plunger to the closed position, blocking gas or liquid flow. This self-actuating mechanism provides safety functionality without adding complex control circuits or external actuators.
Solution Approach 2:
The stop plunger acts as an intermediary mechanical element that responds to pressure differential to control the flow path. It mediates between the pressure conditions in the system and the need to block or allow gas/liquid flow, providing a simple yet effective safety mechanism that translates pressure changes into flow control actions.
2Object-affected harmful factors
If the stop plunger blocks gas or liquid flow during compressor failure, then harmful substance exposure is prevented, but gas or liquid flow is restricted during normal operation
Solution Approach 1:
The stop plunger transitions dynamically between two positions based on operating conditions. During normal operation, the plunger remains in the open position allowing full gas or liquid flow. Upon compressor failure, the pressure differential causes the plunger to move to the closed position, blocking flow. This dynamic positioning ensures that flow restriction occurs only when necessary for safety, maintaining full operational capacity during normal conditions.
Solution Approach 2:
The system uses pressure differential as a triggering parameter to control plunger position. When pressure on both sides of the plunger is equal (normal operation), the plunger remains open. When pressure differential occurs (compressor failure), the plunger closes to block flow. This parameter-based control ensures that flow restriction is directly tied to the actual safety condition, preventing unnecessary restrictions during normal operation.
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
Effectively prevents harmful gas or liquid exposure during compressor failure by ceasing flow when pressure imbalance is detected, enhancing safety and reducing the need for cumbersome airtight enclosures.
Implementation Method 1
maintaining equal pressure during normal operation and moving to block gas or liquid flow when pressure differential occurs due to compressor failure
Data Source
AI summary
Embodiments of a compressor cutoff are presented. In an embodiment, the present invention includes apparatus for cutting off the flow of gas/liquid in the event of compressor failure or breakdown. In this embodiment, gas/liquid flows from its source through one or more passageways into a first input chamber, and also through one or more other passageways into a second input chamber, where the first and second input chambers are separated by a stop plunger. During the down-stroke of the compressor's piston, gas/liquid in the first chamber passes (or is drawn) through an inlet valve of the piston bore, and during the up-stroke of the piston that gas/liquid is forced through an outlet valve to a tank or other compressed gas/liquid receptacle. So long as the compressor operates normally, the pressure in the two input chambers (i.e., on each side of the stop plunger) will be substantially equal, thereby keeping the stop plunger in place. If, however, the compressor fails in a manner that exposes gas/liquid in the piston bore to the atmosphere, or otherwise results in a decrease in pressure in the piston bore, the pressure in the first input chamber will fall below the pressure in the second input chamber, thereby causing the stop plunger to move to a position in which it blocks the flow of gas/liquid from entering the inlet valve of the piston bore.