Flameproof Valve Monoblock Control Unit for Compact Mining Hydraulics
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Solution Overview
Problem
Existing control units for mining machines, particularly underground mining machines, face challenges in achieving a compact, reliable, and flameproof design due to the space demands and leakage risks associated with standard internal valve technology, and the need for flameproof certification of each component in sandwich valve technology.
Innovation Solution
The use of valve monoblocks with distinct fluid passages within a flameproof housing, which allows for a compact, flexible, and adaptable design that reduces the number of sealing elements and parts required for certification, enabling higher operating pressures and easier implementation of safety standards, while external monoblocks can provide additional functions without increasing the risk of ignition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard internal valve technology (standard directional valves and cartridge valves) is used, then the control unit achieves reliable function, but the space demand increases and design flexibility decreases
Solution Approach 1:
The patent integrates multiple valve functions into a single monoblock structure containing multiple fluid passages and valve elements. This merging of previously separate valve components into one unified block reduces the overall space requirement while maintaining the reliability of individual valve functions through proven internal valve technology.
Solution Approach 2:
The monoblock valve assembly serves multiple control functions simultaneously through its integrated fluid passages and multiple valve elements. This multi-functional design eliminates the need for separate valve units for different hydraulic functions, thereby reducing the total volume of the control unit while preserving all necessary control capabilities.
2Reliability
If standard internal valve technology is used, then the control unit achieves reliable function, but the number of sealing elements increases leading to higher leakage risk
Solution Approach 1:
By combining multiple valve functions into a single monoblock structure, the patent reduces the total number of external sealing interfaces and connections. The integrated design minimizes the number of sealing elements required compared to assembling multiple separate valve units, thereby reducing potential leakage points while maintaining functional reliability.
3Volume of stationary object
If sandwich valve technology is used, then the control unit achieves compact design, but flameproof certification is required for each component increasing complexity
Solution Approach 1:
The patent merges multiple valve functions into a single monoblock assembly that can be treated as one integrated unit for flameproof certification purposes. This approach maintains the space-efficient advantages of sandwich valve technology while reducing certification complexity by minimizing the number of separate components that would otherwise each require individual certification.
4Volume of stationary object
If the control unit is designed to be compact for narrow space confines, then space efficiency improves, but the number of sealing elements increases leading to higher leakage risk
Solution Approach 1:
The monoblock valve assembly integrates multiple fluid passages and valve elements into a single compact unit, achieving space efficiency without proportionally increasing the number of external sealing interfaces. The internal integration of multiple functions within one block reduces the total number of sealing elements compared to compact assemblies of multiple separate valves.
Data Source
AI summary
A control unit for controlling machine functions of a mining machine, such as an underground mining machine, tunneling machine or bolting rig, includes a flameproof housing having at least one fluid inlet and at least one fluid outlet, and a plurality of fluid control valves respectively communicating with the at least one inlet and outlet. In particular, the fluid control valves are formed inside at least one valve monoblock, the monoblock including a plurality of distinct fluid passages.