Three-Way Ball Valve Layout for Compact Boiler Circuit Isolation
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Solution Overview
Problem
The existing three-way ball valve systems in gas wall boilers require additional shut-off valves for secure operation, which increase complexity, cost, and space requirements, particularly in compact wall boilers.
Innovation Solution
A three-way ball valve design with a compact, simple structure that eliminates the need for shut-off valves by using a ball plug that rotates 90° within a seat, allowing fluid flow through different conduits and incorporating non-return valve cartridges for one-way flow, maintaining a connection geometry similar to T-shaped valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional T-shaped three-way ball valves with shut-off valves are used, then reliable isolation between circuits is achieved, but device complexity and number of components increase
Solution Approach 1:
The patent combines multiple valve functions into a single three-way ball valve body. The valve integrates the three-way flow control function with shut-off capabilities, eliminating the need for separate shut-off valves. The ball plug with specifically designed openings and sealing surfaces performs both flow direction control and circuit isolation functions simultaneously.
Solution Approach 2:
The three-way ball valve is designed to perform multiple functions: it controls flow between three circuits (heating circuit, domestic hot water circuit, and external water supply) and provides reliable shut-off capability for both circuits simultaneously. The single valve body with its multi-functional ball plug replaces what previously required multiple specialized valves.
2Reliability
If shut-off valves are added to ensure secure circuit interruption, then reliability improves, but the boiler dimensions and weight increase
Solution Approach 1:
The shut-off function is merged into the three-way ball valve itself. The valve body and ball plug are designed to provide reliable isolation for both the heating circuit and domestic hot water circuit simultaneously, eliminating the need for additional shut-off valves that would increase the boiler's weight.
3Reliability
If shut-off valves are installed for secure circuit isolation, then reliability improves, but manufacturing cost increases
Solution Approach 1:
The patent merges the shut-off function into the three-way ball valve, reducing the total component count. This simplification reduces manufacturing costs by eliminating the need to manufacture, assemble, and maintain separate shut-off valves, while maintaining reliable circuit isolation through the integrated valve design.
4Reliability
If additional shut-off valves are installed, then circuit isolation reliability improves, but the space occupied within the boiler increases
Solution Approach 1:
The integrated three-way ball valve consolidates multiple valve functions into a single compact unit. The valve body with its internal conduit arrangement and multi-functional ball plug provides both three-way flow control and shut-off capability in one package, significantly reducing the space required compared to multiple separate valves.
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
This design reduces the number of shut-off valves needed, enhancing compactness and reducing costs while maintaining operational isolation between the heating and domestic hot water circuits, allowing for efficient filling and normal operation without additional geometrical modifications to the boiler.
Implementation Method 1
a ball plug (22) which can rotate 90° inside the seat (21) and which is actuated by the external control lever (15)
Implementation Method 2
In the second outlet conduit (19) there are two non-return valve cartridges (28, 29) mounted in succession that enable water to pass in only one direction
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
A three-way ball valve (10) for boiler-filling circuits has a ball plug (22) internally that is movable between a first position in which a first and second conduit (17, 18) are put in connection and in which a third conduit (19) is excluded and a second position in which the first and the third conduit (17,19) are brought into connection and the second conduit (18) is excluded; the first and the second conduit (17,18) are arranged in a perpendicular position to one another and the first and third conduit (17,19) are arranged in a position substantially parallel and axially offset one another; opposite sealing members (23,24) are also provided that act on the plug (22) and ensure the seal. A simple, cheap and compact valve is thus obtained that enables the use of shut-off valves to be avoided and does not alter the geometry of the filling circuit.