By-pass Pressure Regulator Valve with Pilot Piston Control
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Solution Overview
Problem
Existing by-pass and pressure regulator valves in high-pressure washing systems face issues with high flow pressure loss leading to energy consumption and overheating, sensitivity to flow rate fluctuations, and increased complexity due to multiple mechanisms, resulting in operational inefficiencies and safety concerns.
Innovation Solution
A compact by-pass and pressure regulator valve design that minimizes flow pressure loss by using a pilot piston separated from the contrast spring, which is only subject to pressure differential forces, and integrates a cylindrical chamber with auxiliary conduits to maintain the obturator in the open position without relying on strong springs, allowing for precise calibration and reduced size and component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a strong regulator spring is used to keep the obturator closed, then the operating pressure control function is improved, but the flow pressure loss increases significantly leading to energy consumption and overheating
Solution Approach 1:
The valve is divided into two independent obturators: a first obturator for pressure regulation and a second obturator for pressure reset. This segmentation allows each obturator to be controlled by separate mechanisms (spring for the first, flow pressure differential for the second), eliminating the need for a strong spring that would cause excessive flow pressure loss.
Solution Approach 2:
A pilot piston is introduced as an intermediary element that responds to flow pressure differential and commands the second obturator. This pilot piston translates the flow pressure signal into mechanical action without requiring a strong spring, thereby maintaining low flow pressure loss while achieving reliable obturator closure.
2Loss of energy
If the pilot piston is separated from the contrast spring, then the flow pressure loss is reduced, but the mechanism becomes particularly sensitive and requires extreme precision calibration
Solution Approach 1:
The separation of the pilot piston from the contrast spring creates two independent control systems. The first obturator-spring system handles pressure regulation with inherent mechanical stability, while the second obturator-pilot piston system handles pressure reset with flow-proportional control. This segmentation reduces sensitivity to calibration variations.
Solution Approach 2:
The design allows the spring pre-load and pilot piston geometry to be optimized as independent parameters. The spring can be selected for robust pressure regulation, while the pilot piston can be designed with adequate flow area ratios that provide stable operation across a range of flow conditions, reducing the need for extreme precision calibration.
3Device complexity
If a single device integrates both pressure reset and operating pressure control functions, then the device complexity is reduced, but the flow pressure loss increases to guarantee obturator seal
Solution Approach 1:
The integrated valve uses two separate obturators (first and second) that are independently controlled. The first obturator is managed by the spring mechanism for pressure regulation, while the second obturator is controlled by the pilot piston responding to flow pressure differential. This segmentation of control mechanisms within the integrated structure eliminates the need for excessive flow pressure loss to maintain seals.
Solution Approach 2:
The single valve body houses multiple functions: pressure regulation via the first obturator, pressure reset via the second obturator, and flow monitoring via the pilot piston. This multi-functionality is achieved without requiring a single strong spring, thereby maintaining low flow pressure loss while integrating all necessary functions in one device.
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 solution achieves reduced energy consumption, improved reliability, and a broader range of operational flows with enhanced safety by maintaining the obturator in the open position with minimal pressure loss, allowing for efficient pressure regulation and easy calibration, while enabling integration with micro-switches for electrical control.
Implementation Method 1
governed by a fluid pressure difference between the first tract (13a) and the second tract (13b) of the main conduit (13)
Implementation Method 2
means for determining a flow pressure loss in the fluid crossing the main conduit (13)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A by-pass and pressure regulator valve (1) exhibiting: an inlet mouth (10) and an outlet mouth (11) set in reciprocal communication by a main conduit (13); a by-pass mouth (12). The by-pass and pressure regulator valve (1) comprises: an obturator (20), mobile between at least a closed position, in which it interrupts fluid communication between the main conduit (13) and the by-pass mouth (12), and at least an open position, in which the fluid communication is not interrupted; operating pressure control means (30), predisposed to move the obturator (20) from the closed position; means for determining a flow pressure loss (40) in fluids crossing the main conduit (13), arranged along the main conduit (13) in order to separate a first tract (13a) upstream of the main conduit (13) from a second tract (13b) downstream thereof; obturator (50) command means governed by a fluid pressure difference between the first tract (13a) and the second tract (13b) of the main conduit (13), distinct from the operating pressure control means (30) but operatively connected to the obturator (20).