Liquid Filter Clean-Side Stop Valve for Leakage Prevention
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Solution Overview
Problem
Conventional liquid filters experience significant pressure loss and liquid leakage during demounting due to fluid-mechanical check valves, which complicates the exchange process and can lead to environmental contamination.
Innovation Solution
A liquid filter design incorporating a stop valve downstream of the filter bellows, actuated by a discharge socket, which closes the clean-side outlet in the unmounted state and opens mechanically during mounting, preventing liquid escape and minimizing pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a fluid-mechanical check valve is used to prevent liquid escape during demounting, then liquid leakage is prevented, but pressure loss increases significantly
Solution Approach 1:
The patent replaces the fluid-mechanical check valve with a mechanically actuated stop valve system. The stop valve is opened by a discharge socket of the liquid circuit through direct mechanical contact, eliminating the need for fluid pressure to open the valve. This substitution maintains the ability to prevent liquid leakage during demounting while significantly reducing pressure loss during operation, as the mechanical actuation requires minimal force and does not create the same flow resistance as a fluid-mechanical check valve.
2Object-generated harmful factors
If a clean-side check valve is added to prevent liquid escape, then liquid leakage is prevented, but device complexity increases
Solution Approach 1:
The patent merges the stop valve function with the existing discharge socket of the liquid circuit. The discharge socket serves a dual purpose: it is both the connection point for the liquid circuit and the actuating mechanism for the stop valve. This integration eliminates the need for separate actuating mechanisms and reduces the overall complexity of the valve system while maintaining the capability to prevent liquid leakage during demounting.
3Loss of energy
If a stop valve is mechanically actuated by the discharge socket, then pressure loss is minimized and liquid leakage is prevented, but the mechanism requires precise mechanical alignment
Solution Approach 1:
The discharge socket of the liquid circuit automatically performs the dual function of connecting the liquid circuit and actuating the stop valve through its own presence and geometry. The mechanical actuation is self-service, requiring no external actuators or complex control systems. The design leverages the inherent geometry of the discharge socket to provide the necessary mechanical force for valve actuation, thereby minimizing pressure loss while avoiding the need for additional precision mechanical components.
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 prevents liquid leakage during demounting, ensures a clean exchange process, and reduces pressure loss, thereby enhancing operational efficiency and environmental safety.
Implementation Method 1
the stop valve is openable mechanically by a discharge socket of the liquid circuit in the mounted state of the liquid filter
Implementation Method 2
The filter element of the liquid filter divides the liquid filter in this context into a raw side upstream of the filter element in flow direction and containing unfiltered liquid and a clean side downstream of the filter element in flow direction and containing the filtered liquid
Data Source
AI summary
A liquid filter for detachable arrangement at a liquid circuit has a filter bellows and an outlet opening at the clean side. A stop valve downstream of the filter bellows closes the outlet opening in an unmounted state of the liquid filter. The stop valve is opened mechanically by a discharge socket of the liquid circuit in a mounted state of the liquid filter. An assembly with liquid circuit and liquid filter detachably arranged at the liquid circuit is provided. The liquid filter has a filter bellows, an outlet opening at the clean side, and a stop valve downstream of the filter bellows closing the outlet opening in an unmounted state of the liquid filter, wherein a discharge socket of the liquid circuit connects to the clean side and actuates and opens mechanically the stop valve of the liquid filter in the mounted state of the liquid filter.