Two-Stage Pilot Pulse Valve for Faster Dust Collector Cleaning
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Solution Overview
Problem
Existing pulse valve assemblies in dust collectors require frequent pulses of high velocity fluid to effectively clean filter elements, leading to increased energy consumption and operational inefficiencies.
Innovation Solution
A pulse valve assembly design featuring a main valve driven by two pilot valves, where a first pilot valve controls a second pilot valve, which in turn drives the main valve, allowing for faster response times and higher impact force with fewer pulses, thereby improving cleaning efficiency and reducing energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent pulses of high velocity fluid are used to clean filter elements, then cleaning effectiveness is improved, but energy consumption increases
Solution Approach 1:
The patent employs a two-stage pilot valve system that dynamically controls the main valve spool movement. The first pilot valve initiates spool movement by directing pressurized fluid to one side of the spool, while the second pilot valve completes the movement by directing fluid to the other side. This dynamic, staged approach enables faster valve response time, allowing cleaning pulses to be less frequent yet more effective, thereby reducing overall energy consumption while maintaining cleaning effectiveness
Solution Approach 2:
The control system is segmented into two pilot valves working in sequence rather than one pilot valve. The first pilot valve (with first and second outlets) and second pilot valve (with third outlet) divide the control function into stages. This segmentation allows the main valve to respond more quickly to cleaning needs, reducing the frequency of high-energy pulses required while ensuring thorough filter element cleaning when pulses do occur
2Productivity
If faster response time is achieved with pilot valves, then cleaning efficiency improves, but device complexity increases
Solution Approach 1:
The patent uses pilot valves as intermediary control elements between the control signal and the main valve. The first pilot valve receives control signals and uses them to control fluid flow that acts on the main valve spool. The second pilot valve similarly intermediates between control signals and the main valve. These intermediary pilot valves enable fast response times for improved cleaning efficiency while keeping the main valve structure relatively simple, as the complex control logic is distributed across the pilot valves rather than the main valve
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
This design enables more complete cleaning of filter elements with less energy, allowing for less frequent pulses and reduced electricity costs, while maintaining efficient operation of the dust collector.
Implementation Method 1
When pressurized fluid accumulates in the pressure chamber, it applies a force to the main valve spool, which causes the main valve spool to move towards either the open position or the closed position
Implementation Method 2
This pilot valve includes a valve member that moves when the solenoid is energized to open the pilot valve
Implementation Method 3
The main valve spool includes a main valve member that is configured to block fluid flow between the inlet port and the outlet port when the main valve spool is in the closed position and permit fluid flow from the inlet port to the outlet port when the main valve spool is in the open position
Data Source
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AI summary
A pulse valve assembly including a main valve and two pilot valves. The main valve includes a main valve body, main valve bore, and main valve spool. The main valve body includes an inlet port, an outlet port, and a pressure chamber at one end of the main valve bore. A first pilot valve selectively supplies pressurized fluid to the second pilot valve depending on the position of a poppet, which is controlled by a solenoid. A second pilot valve includes a spool that is driven by pressurized fluid from the first pilot valve. The second pilot valve selectively supplies pressurized fluid to the pressure chamber in the main valve causing the main valve spool to move towards the open or closed position. When the main valve spool is in the open position, pressurized fluid can flow through the main valve from the inlet port to the outlet port.