Coaxial High-Pressure Coupling Overpressure Relief Valve
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Solution Overview
Problem
High-pressure couplings face difficulties due to pressure increases in the plug part, making coupling challenging, and existing solutions like relief valves lead to constant stress on valve bodies and seals, complicating the process.
Innovation Solution
A coaxial high-pressure coupling design with a movable closing cone containing a valve bore connected to the atmosphere, featuring a spring-loaded valve piston that moves into a leakage position to release pressure and a non-return valve to manage fluid volume, along with a pressure riser to reduce outer channel pressure, ensuring easy coupling and preventing overpressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a relief valve is arranged in the closing cone to release pressure, then pressure relief is achieved, but constant high stress on the valve body and seals occurs
Solution Approach 1:
The valve bore is segmented into different sections with a cross-sectional enlargement that creates a stepped structure. This segmentation allows the valve piston to move between different positions (blocking and leakage) and enables pressure relief without requiring the entire valve body to withstand constant high stress.
Solution Approach 2:
The valve piston acts as an intermediary element between the inner channel and the atmosphere. It mediates the pressure relief process by moving to a leakage position when pressure increases, allowing fluid to escape through the valve bore, while the spring provides a cushioning effect that reduces stress on the valve body and seals.
2Reliability
If fluid is enclosed by the closing cone in the uncoupled state, then sealing is maintained, but pressure increase prevents coupling
Solution Approach 1:
The closing cone is designed to be movable rather than fixed. When pressure increases during the coupling process, the closing cone can be displaced along with the valve piston to open position, dynamically adapting to pressure changes and allowing coupling to proceed without being blocked by excessive pressure.
Solution Approach 2:
The spring is preloaded to provide a biasing force on the valve piston. This preliminary action ensures that the valve piston is positioned to block the valve bore in the normal uncoupled state, maintaining sealing. When pressure increases, the preliminary spring force allows the piston to move to the leakage position, facilitating coupling.
3Object-affected harmful factors
If a valve piston with spring action is used to control pressure, then automatic pressure relief is achieved, but device complexity increases
Solution Approach 1:
The valve piston with spring action serves multiple functions: it blocks the valve bore to maintain pressure in the uncoupled state, automatically opens to relieve pressure when overpressure occurs, and facilitates the coupling process by moving to the open position. This multi-functionality reduces the need for separate pressure relief mechanisms, thereby limiting the increase in device complexity.
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 effectively reduces pressure in the plug part, preventing overpressure issues and simplifying the coupling process while maintaining seal integrity and operational safety.
Implementation Method 1
with a valve piston arranged displaceably therein and the valve piston passing through Spring action in its the connection between the valve bore and the inner channel blocking blocking position biased and acting against the spring
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The invention relates to a coaxial high-pressure coupling for hoses or pipelines, comprising a plug part (10) and a receptacle part (30) that accommodates the plug part in the coupled state, the plug part (10) and the receptacle part (30) each having a valve body (11, 31) having an inner channel (13, 33) and an outer channel (16, 36) concentric to the inner channel and the inner channels (13, 33) and the outer channels (16, 36) of the plug part (10) and of the receptacle part (30) being connected to each other in the coupled state, and in the inner channel (13) of the valve body (11) of the plug part (10) a closing cone (18) and in the outer channel (16) of the plug part (10) a closing sleeve (23) each being movable against spring action (21, 25) and being displaceable into the opening position thereof by the receptacle part (30) during the coupling process, is characterized in that a valve bore (61), which is connected to the inner channel (13) at one end and has a connection to the atmosphere at the other end and has a valve piston (62) movably arranged in the valve bore, is arranged inside the inner channel (13) formed by an inner pipe (14) and that the valve piston (62) is preloaded by spring action (63) into the blocking position of the valve piston, in which the connection between the valve bore (61) and the inner channel (13) is blocked, and can be displaced into a leakage position by an overpressure in the inner channel (13) that acts against the spring (63).