Pilot Spool Valve Layout for Compact High-Pressure Fluid Discharge
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Solution Overview
Problem
Existing high-pressure fluid discharge devices are large in scale and require significant power to manage large flow rates, making them inconvenient for use in wet environments and prone to vibration.
Innovation Solution
A high-pressure fluid discharge device utilizing a pilot type spool valve that operates between a valve chamber and a pilot chamber, allowing for efficient high-pressure fluid discharge with a small scale design by requiring only a small amount of electrical power, thus enabling a large flow rate without the need for strong return springs or high electrical current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a direct drive type solenoid valve is used to cope with large flow rate, then the flow rate can be increased, but the device becomes large in scale and requires large power supply
Solution Approach 1:
The patent introduces a pilot valve as an intermediary component that controls the main valve indirectly. The pilot valve responds to small electrical signals and uses fluid pressure to actuate the main valve, which handles the large flow rate. This mediator approach allows the solenoid coil to remain small while still controlling large flow rates through the main valve.
Solution Approach 2:
The valve system is segmented into two functional parts: a pilot valve for control purposes and a main valve for flow regulation. The pilot valve handles the control signal and fluid pressure management, while the main valve handles the high-flow fluid passage. This segmentation allows each component to be optimized independently, keeping the control portion small while maintaining large flow capability.
2Productivity
If a direct drive type solenoid valve is used to cope with large flow rate, then the flow rate can be increased, but the power supply requirement increases
Solution Approach 1:
The pilot valve acts as an intermediary that amplifies the control effect. A small electrical signal to the pilot valve creates a pressure differential that actuates the main valve, which then controls the large flow rate. This allows the power consumption to remain low while still achieving large flow rate control through the fluid pressure amplification mechanism.
Solution Approach 2:
The patent uses pneumatic/hydraulic principles where fluid pressure serves as the actuating force for the main valve. The pilot valve modulates the pilot chamber pressure, which then drives the main valve diaphragm or piston. This fluid pressure mechanism provides force amplification, allowing small electrical power to control large fluid flows without requiring proportionally large electrical power.
3Device complexity
If a pilot type solenoid valve with direct drive is used, then the structure is simple, but vibrations occur and stable operation is difficult
Solution Approach 1:
The pilot valve serves as a mediator that provides stable control of the main valve. By controlling the pilot chamber pressure, the pilot valve ensures smooth and stable actuation of the main valve diaphragm or piston, reducing vibrations and improving operational reliability. The intermediary control mechanism filters out direct drive vibrations.
Solution Approach 2:
The patent changes the control parameter from direct electrical drive to indirect fluid pressure control. The pilot valve modulates the pilot chamber pressure, which then acts on the main valve diaphragm or piston. This parameter change from electrical force to fluid pressure provides smoother, more stable actuation with reduced vibrations and improved reliability.
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 device achieves efficient high-pressure fluid discharge with a large flow rate while maintaining a compact size, reducing the risk of vibration and operational complexity, and allowing for remote control without the need for large power supplies.
Implementation Method 1
by generating a difference in pressure between a flow path of a pressure fluid and a pressure chamber that is partitioned from the flow path by a main valve body such as a diaphragm or the like, the main valve body is driven in a valve opening direction
Implementation Method 2
a diaphragm valve body configured to operate in conjunction with a valve seat provided in the body to switch between allowing and blocking communication between the first flow path and the second flow path
Data Source
AI summary
A high-pressure fluid discharge device that can adapt to large flow rates while being small in size has a diaphragm valve body that cooperates with a valve seat provided to a body to switch between communication and blocking between a first flow path and a second flow path. A pilot chamber and a valve chamber joined to the first flow path are sectioned by the diaphragm valve body, and the diaphragm valve body is provided with a pilot passage allowing communication between the valve chamber and the pilot chamber. The diaphragm valve body is also provided with a pilot-type spool valve that switches between communication and blocking between the pilot chamber and an excretion port.