Integrated Valve Arrangement Error Detection Safety Switch
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Solution Overview
Problem
Existing valve arrangements for hydraulic systems lack integrated safety mechanisms that can autonomously detect and respond to errors, relying on external monitoring systems to prevent hydraulic fluid supply interruptions, which complicates safety assurance and regulatory approvals.
Innovation Solution
Incorporating an error detection device and a safety switch device within the valve arrangement, allowing for self-testing and immediate error response, ensuring the safety valve can block hydraulic fluid supply without external communication, and simplifying the connection design for error signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external monitoring devices and cables are used to detect errors and control safety valves, then the system can detect errors, but the device complexity and regulatory approval difficulty increase
Solution Approach 1:
The patent combines the error detection device, safety switch device, and safety valve into a single integrated valve arrangement. The error detection device is coupled to control valves, and the safety switch device is coupled to both the error detection device and safety valve, creating a self-contained system that eliminates external monitoring cables and devices.
Solution Approach 2:
The valve arrangement performs self-diagnosis through the integrated error detection device that automatically monitors control valves and triggers the safety valve through the safety switch device without requiring external monitoring systems. The system is self-sufficient for safety functions.
2Reliability
If external monitoring systems are used for safety detection, then errors can be detected, but the response time is delayed due to external communication requirements
Solution Approach 1:
The error detection device and safety switch device are integrated within the valve arrangement, eliminating external communication delays. When an error is detected in control valves, the safety switch device immediately actuates the safety valve to block hydraulic fluid supply without requiring external signal transmission.
3Adaptability or versatility
If multiple control valves are connected to a component group, then hydraulic functions are enabled, but safety assurance becomes more complex
Solution Approach 1:
The integrated safety system serves multiple control valves simultaneously through a single error detection device and safety switch device. The system provides universal safety coverage for all control valves connected to the component group, enabling hydraulic functions while maintaining simplified safety assurance.
Data Source
AI summary
The invention concerns a valve arrangement (1) with a high-pressure connection (P), a low-pressure connection (T), at least one control valve (2 to 5), which is accommodated in a control valve module and has at least one working connection (A, B) for a hydraulic consumer (7 to 10), and a safety valve (6), which is accommodated in a safety valve module, and which releases or blocks a passage between the high-pressure connection (P) and the control valves (2 to 5), the control valve module (2 to 5) and the safety valve module (6) being connected to one component group. It is endeavoured to provide a valve arrangement with a high safety level. For this purpose, it is ensured that each control valve (2 to 5, 2′ to 5′) has an error detection device (19), that the safety valve module (6) has a safety switch device (21) and that the component group has a connection (20) between the safety switch device (21) and the error detection device (19).