Pilot Hydraulic Directional Valve for Shutdown and Minimum Pressure
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Solution Overview
Problem
Current hydraulic control systems require separate shutdown and minimum pressure valves, leading to increased complexity, cost, and reduced reliability and maintainability.
Innovation Solution
A pilot operated hydraulic directional control valve integrating emergency shutdown and minimum pressure functions into a single unit, utilizing a spool, spring, and control piston to manage fluid flow and ensure safe shutdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate shutdown valve and minimum pressure valve are used, then system safety is ensured, but system complexity and cost increase
Solution Approach 1:
The patent combines the emergency shutdown valve and minimum pressure valve into a single integrated valve assembly. The valve body houses both the shutdown spool mechanism and the minimum pressure monitoring mechanism, eliminating the need for separate valves and reducing system complexity while maintaining safety functions.
Solution Approach 2:
The integrated valve assembly performs multiple functions: emergency shutdown control, minimum pressure monitoring, and pressure restoration. The single valve unit replaces what would traditionally require separate specialized valves, achieving multi-functionality in one component.
2Reliability
If separate shutdown valve and minimum pressure valve are used, then system safety is ensured, but system cost increases
Solution Approach 1:
By merging the shutdown and minimum pressure valve functions into one integrated assembly, the patent reduces the total number of components, piping connections, and installation requirements. This consolidation lowers manufacturing costs, reduces inventory requirements, and simplifies maintenance while preserving all safety functions.
3Reliability
If separate shutdown valve and minimum pressure valve are used, then system safety is ensured, but system maintainability is reduced
Solution Approach 1:
The integrated valve assembly reduces the number of separate components that require maintenance. With fewer valves, connections, and potential failure points in the system, maintenance activities are simplified and can be performed more efficiently on a single unified component rather than multiple separate units.
4Reliability
If separate shutdown valve and minimum pressure valve are used, then system safety is ensured, but piping requirements increase
Solution Approach 1:
Since the shutdown and minimum pressure functions are integrated into a single valve assembly with a unified port structure, the piping requirements are significantly reduced. The valve body contains all necessary internal passages and connections, eliminating the need for additional external piping that would be required to connect separate valves.
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
Simplifies system design by combining emergency shutdown and minimum pressure functions, reducing complexity and cost while enhancing reliability and maintainability.
Implementation Method 1
pilot operated hydraulic directional control valve
Implementation Method 2
a spring, and a control piston
Data Source
AI summary
A pilot operated hydraulic directional control valve. The hydraulic directional control valve comprises a valve body, a spool, a spring and a control piston. The valve body comprises four top ports and four bottom ports. When a spring force which is applied to a first end of the spool is less than a piston force which is applied to a second end of the spool, the hydraulic directional control valve is in working position. When the spring force is greater than the piston force, the hydraulic directional control valve is in shutdown position.