Automatic Inlet Check Valve Release Mechanism
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Solution Overview
Problem
Paint pumps often experience stuck inlet check valves due to inadequate cleaning, leading to inadequate paint suction and requiring manual disassembly for operation.
Innovation Solution
An automatic inlet check valve release mechanism that uses a solenoid and electrical circuit to momentarily displace the movable element from the valve seat when power is applied, ensuring the valve is cleared of adhesion and preventing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pump is used without automatic release mechanism, then the structure is simple, but the inlet check valve gets stuck due to paint adhesion
Solution Approach 1:
The solenoid is activated automatically when electrical power is applied to the pump, before the pump begins normal operation. This preliminary action momentarily displaces the movable element from the seat to break any paint adhesion that may have formed during storage or previous use, ensuring the valve is ready for reliable operation without requiring manual intervention.
Solution Approach 2:
The patent replaces the manual mechanical disassembly process with an automated electromagnetic system. Instead of requiring operators to manually disassemble the inlet check valve to free stuck components, a solenoid generates an electromagnetic field that automatically displaces the movable element, substituting a simple electromagnetic mechanism for complex manual mechanical intervention.
2Productivity
If manual disassembly is required to free stuck valve, then the valve structure is simple, but operator time and productivity are reduced
Solution Approach 1:
The inlet check valve assembly performs its own maintenance function automatically. When electrical power is applied to the pump, the solenoid automatically activates to displace the movable element and break adhesion, allowing the valve to free itself without requiring external manual intervention. This self-service capability eliminates operator time loss and maintains continuous productivity.
Solution Approach 2:
The solenoid activation occurs periodically each time electrical power is applied to the pump. This periodic action ensures that the movable element is displaced from the seat at the start of each pumping operation, preventing paint adhesion from causing operational delays and maintaining consistent productivity across multiple use cycles.
3Reliability
If the solenoid is exposed to paint environment, then the assembly is simple, but the solenoid becomes contaminated
Solution Approach 1:
The assembly is segmented into two distinct zones: a paint-exposed zone containing the inlet check valve and a protected zone containing the solenoid. This segmentation is achieved through strategic positioning and shielding structures that separate the solenoid from direct contact with paint, allowing each component to operate in its appropriate environment without contamination while maintaining overall functional integration.
Solution Approach 2:
The patent introduces intermediary structures such as shields, barriers, or positioning arrangements that mediate between the paint environment and the solenoid. These intermediaries protect the solenoid from paint contamination while still allowing the electromagnetic field to function effectively, ensuring reliable solenoid operation without direct exposure to the harsh paint environment.
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
Automatically resolves stuck inlet valve issues, ensuring reliable paint suction and preventing contamination, thereby reducing operator inconvenience and increasing operational efficiency.
Implementation Method 1
An automatic inlet check valve release mechanism that uses a solenoid and electrical circuit to momentarily displace the movable element from the valve seat when power is applied
Data Source
AI summary
Apparatus and method for releasing a stuck inlet check valve of a paint pump including a solenoid connected to the check valve with a pusher element which momentarily displaces a moveable element such as a ball in the check valve to break any adhesion between the movable element and a valve seat. A control provides a single pulse of energy to the solenoid each time power is applied to the pump. The control includes an SCR connected between a full wave rectifier and a coil of the solenoid, with gate current removed from the SCR to commutate the SCR after a predetermined time interval after power is applied.