Tapping Fitting Ball Valve Locking Mechanism
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Solution Overview
Problem
Existing tapping fittings allow medium to enter the tapping socket or the tapping unit to be displaced during the drilling process due to pressure, leading to inefficiencies and potential damage.
Innovation Solution
Incorporation of a ball valve within the tapping socket that can only be opened when the tapping unit is securely locked in place, ensuring a defined alignment and preventing accidental opening, thus preventing medium entry and unit displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tapping socket is open to allow drilling, then the drill can access the pipe, but medium can enter the tapping socket and cause displacement or damage
Solution Approach 1:
The ball valve is pre-positioned in the closed state before drilling begins. The operator must deliberately open the valve to access the pipe, ensuring the socket is sealed during non-operational phases. This preliminary positioning prevents accidental medium release while maintaining drilling capability when needed.
Solution Approach 2:
The ball valve acts as an intermediary element between the sealed tapping socket and the external drilling environment. It mediates the transition from closed to open state, controlling medium flow while enabling drill access. The valve serves as a controlled interface that reconciles the conflicting requirements of sealing and accessibility.
2Adaptability or versatility
If the ball valve can be opened freely, then medium flow can be controlled, but the valve may open accidentally causing medium entry
Solution Approach 1:
The ball valve incorporates asymmetric features including a non-circular actuator shape that corresponds to a matching recess in the tapping unit, and an angled opening direction that does not align with the drilling axis. This asymmetric design ensures the valve can only be opened when the tapping unit is correctly positioned and deliberately actuated, preventing accidental opening while maintaining flow control capability.
Solution Approach 2:
The valve opening mechanism requires preliminary correct positioning of the tapping unit with defined alignment features. The asymmetric actuator must be engaged in the correct orientation before opening can occur, ensuring that flow control is only available when the system is properly configured and the operator intends to drill.
3Ease of operation
If the tapping unit is not securely locked, then the unit can be removed easily, but the unit may be displaced under medium pressure
Solution Approach 1:
The locking mechanism transitions from a locked state during drilling to an unlocked state for removal. The defined alignment features between the tapping unit and ball valve create a temporary constrained state during operation, while the reversible locking design allows easy transition to an unconstrained state when drilling is complete. This dynamic behavior provides both secure positioning and easy removal.
Solution Approach 2:
The locking mechanism is automatically engaged when the tapping unit is inserted and aligned with the ball valve. This preliminary locking action occurs before drilling begins, ensuring the unit is secured against medium pressure. The operator simply removes the unit after drilling to unlock it, making removal as easy as insertion in reverse.
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3
AI summary
The fitting has a tapping unit (40) attached with a borer (42) on a tapping nozzle for tapping a pipe (100), where the tapping fitting is connected with the pipe. A valve i.e. spherical valve (20), is integrated in the tapping nozzle. The valve is opened, when the tapping unit is blocked. A ball tap (30) is fetched in a closed condition, so that the tapping nozzle and the pipe are fluidly separated from each other. The ball tap is removed, and the tapping unit is released for unlock. The ball tap is positioned on an outlet, and tapping nozzle is closed opposite to the pipe.