Filter Device Drain Screw Multi-Function Disassembly
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Solution Overview
Problem
Existing filter devices face challenges in easily maintaining and replacing large ring filter elements due to strong frictional forces and swelling of sealing rings, which can cause the filter element to become stuck, making manual removal necessary.
Innovation Solution
A filter device with a drain plug that serves both as a drainage aid and a disassembly tool, featuring a driver contour that interacts with a counter-driver contour on the ring filter element, allowing for the release and rotation of the filter element, facilitating its removal from the filter housing pot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clip connection is used to hold the ring filter element in the filter housing pot, then the filter element can be securely held during operation, but the filter element becomes difficult to remove when the seal swells and sticks during operation
Solution Approach 1:
The drain screw is used to perform preliminary action by loosening the swollen seal before the filter element needs to be removed. By draining liquid through the drain channel and applying rotational force, the seal is loosened in advance, making subsequent removal of the filter element easier
Solution Approach 2:
The drain screw acts as an intermediary tool between the operator and the filter element. Instead of directly removing the stuck filter element, the drain screw mediates by first loosening the seal through rotational movement, then enabling easier removal of the filter element
2Device complexity
If the drain screw only serves as a drainage function, then the drainage task is simple, but an additional tool is needed to remove the stuck filter element
Solution Approach 1:
The drain screw is designed with multi-functionality, serving both as a drainage device and as a tool for removing the filter element. The external thread on the drain screw allows it to engage with the filter element and apply rotational force, enabling it to perform both drainage and filter element removal functions with a single component
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a filter device (1) having a filter housing cup (2) and a ring filter element (5) arranged therein. The invention is characterized in that the filter housing pot (2) has a central drain channel (6), in which a drain screw (9) having a driver contour (10) is arranged. The ring filter element (5) has a lower end disk (11) having a ring seal (12) interacting with the filter housing pot (2) and having a counter-driver contour (13) interacting with the driver contour (10). The drain screw (9) is adjustable between at least three positions, namely, a lower position, in which the drain screw (9) tightly closes the drain channel (6), an intermediate position, in which the drain screw (9) does not yet interact with the counter-driver contour (13) on the ring filter element side via the driver contour (10) thereof, and an upper position, in which the drain screw (9) interacts with the counter-driver contour (13) on the ring filter element side via the driver contour (10) thereof, by way of which a twisting of the drain screw (9) causes a twisting of the ring filter element (5).