Filter Cartridge Loose-Proof Structure for Water Hammer Resistance
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Solution Overview
Problem
Existing water purifier systems face issues with thread loosening and leakage due to unstable water pressure and sudden changes in water flow, leading to water hammer phenomena, which result in resource wastage.
Innovation Solution
A loose-proof structure for the filter cartridge shell featuring a spirally coupled upper end cover with a raised rafter edge, a loose-proof fixed ring, locking teeth, and a cone-shape ramp, along with a rubber sealing ring, to securely lock the upper end cover and prevent rotation, ensuring a tight seal and resistance to water pressure fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If threads are used to connect the end cover and barrel, then the producing process is simple and the filter cartridge can be replaced conveniently, but the threads will loosen easily due to water hammer and unstable water pressure, leading to leakage
Solution Approach 1:
The connection structure is divided into multiple functional elements: threads for basic connection, raised rafter edge for positioning, loose-proof fixed ring for locking, locking teeth for anti-loosening, and scabs with grooves for additional securing. Each segment performs a specific function to collectively solve the thread loosening problem while maintaining manufacturing simplicity.
Solution Approach 2:
The loose-proof fixed ring is pre-installed on the raised rafter edge before the end cover is fully tightened. The locking teeth and scabs are pre-positioned to engage with the threaded connection, creating a preliminary locking mechanism that prevents loosening before water hammer occurs during operation.
2Reliability
If a complex locking mechanism is added to prevent thread loosening, then the reliability improves, but the device complexity increases
Solution Approach 1:
Multiple anti-loosening functions are merged into a single integrated loose-proof fixed ring component that combines the locking teeth, scabs, and fixed ring structure. This consolidation provides reliable thread loosening prevention while avoiding the complexity of multiple separate locking mechanisms.
Solution Approach 2:
The locking teeth and scabs are designed to automatically engage and lock the threaded connection without requiring external locking devices or complex adjustment mechanisms. The structure self-secures through the interaction between the raised rafter edge, fixed ring, locking teeth, and scabs, maintaining reliability while minimizing added complexity.
Data Source
AI summary
A loose-proof structure of a filter cartridge shell, includes: a filter cartridge shell body, the filter cartridge shell body has an open end which includes several treads in its inside and an upper end surface, and an upper end cover, which is hermetically and spirally coupled with the filter cartridge shell body. The upper cover has a raised rafter edge. The raised rafter edge and the open end are equipped with a loose-proof fixed ring. a periphery surface of the raised rafter edge has loose-proof locking teeth, an inside surface of the loose-proof fixed ring has loose-proof tooth spaces matching with the loose-proof locking teeth. An external end surface of the open end has loose-proof scabs, the loose-proof fixed ring has loose-proof grooves on its bottom matching with the loose-proof scabs.