Coaxial Coupling with Bypass Valve for Rapid Pressurized Connection
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Solution Overview
Problem
Existing coaxial couplings face challenges in rapid connection under high pressure, especially when exposed to heat, leading to increased pressure that requires excessive force and special tools for disconnection, which hampers rescue operations by inefficiencies and potential oil spillage.
Innovation Solution
A coaxial coupling design featuring a locking sleeve with pins that allow easy rotation for connection, a relief valve for pressure equalization, and a non-return valve collar to manage pressurized oil flow, enabling efficient coupling without excessive force and preventing oil spillage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a male part with pressurized hydraulic oil is exposed to heat from the sun, then the pressure in the enclosed oil increases, but coupling together becomes impossible without special tools to emergency open valves
Solution Approach 1:
The coupling mechanism includes a preliminary pressure equalization phase where the male and female parts are brought into partial engagement, allowing pressure to equalize through communication holes before the sealing elements make full contact. This preliminary action prevents the high pressure differential that would otherwise make coupling impossible when the male part is pre-pressurized and exposed to heat.
Solution Approach 2:
Communication holes act as intermediaries between the high-pressure and low-pressure chambers, allowing gradual pressure equalization during the coupling process. These holes provide a controlled pathway for fluid communication, enabling the coupling to occur even when one part is pre-pressurized without requiring emergency valve opening.
2Ease of operation
If excessive force is applied to couple together pressurized coaxial couplings, then connection can be achieved, but oil spillage occurs and special tools are required
Solution Approach 1:
The coupling process begins with a preliminary engagement phase where the male and female parts are brought into partial contact, allowing pressure equalization through communication holes before the sealing elements fully engage. This preliminary action establishes pressure equilibrium, enabling subsequent full coupling without excessive force or oil spillage.
Solution Approach 2:
The communication holes are extracted from the traditional sealed coupling design, creating a deliberate fluid communication pathway that allows pressure equalization. This extraction of the sealing function during the coupling phase (with sealing restored after full engagement) eliminates the need for forceful coupling that would cause oil spillage.
3Reliability
If a safety sleeve with L-shaped grooves is used to lock the male part, then uncontrolled flying out is prevented, but the coupling mechanism becomes more complex
Solution Approach 1:
The safety locking function is merged with the bayonet coupling mechanism itself. The bayonet engagement with its angled approach and detent features inherently provides mechanical locking and prevention of uncontrolled separation, eliminating the need for a separate safety sleeve with L-shaped grooves. The coupling structure serves dual purposes: connection and safety locking.
Solution Approach 2:
The bayonet coupling mechanism is designed to perform multiple functions: it provides the primary mechanical connection, enables rotational engagement for easy coupling, and simultaneously serves as the safety locking mechanism. This multi-functionality eliminates the need for separate dedicated safety components, reducing overall device complexity while maintaining reliability.
4Productivity
If rapid-action coupling is attempted on pressurized female parts, then connection speed is improved, but large manual force is required involving multiple persons
Solution Approach 1:
The coupling mechanism incorporates a preliminary engagement phase where the male and female parts are brought into partial contact, allowing pressure equalization through communication holes before full sealing engagement. This preliminary action reduces the pressure differential that would otherwise require large manual forces, enabling rapid coupling by a single operator.
Solution Approach 2:
Communication holes serve as intermediaries that facilitate gradual pressure equalization during the coupling process. By providing a controlled fluid communication pathway, these holes reduce the pressure differential between the male and female parts, eliminating the need for large manual forces while maintaining rapid coupling capability.
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
Facilitates rapid and efficient connection of pressurized tools to pressure sources without requiring excessive force, prevents oil spillage, and ensures safe operation by managing pressure and flow directionally, enhancing rescue efficiency.
Implementation Method 1
any fluid of the male part which may have been expanded by heat from the sun can 'hiss' out to the space present in the female part
Implementation Method 2
a non-return valve collar to manage pressurized oil flow, enabling efficient coupling without excessive force and preventing oil spillage
Data Source
Figure 1~2
Figure 3
Figure 4a
AI summary
The invention relates to a coaxial coupling which comprises a male part (501) and a female part (502) and comprises a bypass valve (218) so that the female part (502) can be decoupled from the male part (501) while pressurized fluid passes through the female part (502). The nipple pipe (105) of the male part (501) pushes a spring-loaded valve (218) in the female part (502) over said rear holes (301) in the inner pipe (2) of the female part. The female part (502) has a rotatable locking sleeve (207), which is coupled to a sleeve (214) accommodating pins (213). The nipple pipe body (104) has helical grooves (100), wherein, upon coupling and rotation of the locking sleeve (207), the pins (213), through rotation of the pins (213), when they fall into the grooves (100), catch in the walls of the grooves (100) and cause the nipple pipe body (104) of the male part to be pulled into the female part (502), one end of the inner pipe (2) meets a relief valve (113) of the male part (501) and opens the relief valve (113), and pressurized oil is discharged against the valve of the female part (502) prior to continued opening of valves (115, 122) in the nipple pipe body (104).