一种用于滤芯测试的工装
The modular design of the filter element testing fixture solves the problem of multiple sets of dedicated fixtures, realizes the universality of filter element testing and reduces costs, and ensures the reliability of test data and the commonality of fixture parts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAWU RAIL TRANSIT EQUIP (SHANGHAI) CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies require multiple sets of specialized tooling, which cannot be universally adapted to filter elements of different sizes, resulting in high testing costs and the inability to share tooling or tooling components.
Design a modular tooling that combines components such as double-ended studs, hexagonal nuts, upper and lower end caps, and O-rings to meet multiple testing requirements, including structural integrity, bypass valve airtightness, bypass valve opening and closing, and type testing. The filter cartridge can be adjusted according to the filter element size.
It achieves the universality and reliability of tooling, reduces testing costs, ensures the reliability of filter element test data, and allows for the sharing of tooling components through local adjustments when adjusting filter element dimensions.
Smart Images
Figure CN224518461U_ABST
Abstract
Claims
1. A tooling for filter cartridge testing comprising a filter drum (6) characterized in that, The filter cartridge (6) has a cavity in the center that can accommodate the filter element. The upper and lower ends of the filter cartridge (6) are respectively fixed with an upper end cover (3) and a lower end cover (9) by fasteners. The upper end cover (3) is sealed to the filter cartridge (6) by a first sealing element, and the lower end cover (9) is sealed to the filter cartridge (6) by a second sealing element. The center of the upper end cover (3) and the lower end cover (9) are provided with threaded holes for installing plugs.
2. A tool for testing a filter cartridge as defined in claim 1, wherein, The fasteners include a double-ended stud (1) and a hexagonal nut (2). The lower end of the double-ended stud (1) passes through the upper end cover (3) and the filter cylinder (6) and is threadedly installed with the lower end cover (9). The upper end of the double-ended stud (1) is threadedly connected to the hexagonal nut (2) to press the filter cylinder (6).
3. A tool for testing a filter cartridge as defined in claim 1, wherein, The first sealing element includes a first O-ring (4) and a second O-ring (5). The first O-ring (4) is fixedly embedded in the bottom surface of the upper end cover (3) and located in the cavity of the filter cartridge (6). The second O-ring (5) is fixedly embedded in the top surface of the filter cartridge (6) and located outside the cavity of the filter cartridge (6).
4. The tool for testing filter cartridges of claim 1 wherein, The second sealing element includes a third O-ring (7) and a fourth O-ring (8). The fourth O-ring (8) is fixedly embedded on the top surface of the lower end cover (9) and located in the cavity of the filter cartridge (6). The third O-ring (7) is fixedly embedded on the bottom surface of the filter cartridge (6) and located outside the cavity of the filter cartridge (6).
5. A tool for testing filter cartridges as defined in claim 1, for use in filter cartridge structural integrity testing, wherein, Remove the filter cartridge (6), the second O-ring (5), and the third O-ring (7) from the fixture. Then install the filter element inside the fixture and fix the medium outlet end of the filter element to the upper end cover (3). Install a plug in the threaded hole of the lower end cover (9). Immerse the fixture and the filter element in industrial alcohol. Input compressed air through the threaded hole of the upper end cover (3) and observe the bubbling state on the outer surface of the filter element.
6. A tool for testing filter cartridges as defined in claim 1, applied to a filter cartridge bypass valve air tightness test, characterized in that, Remove the filter cartridge (6), the second O-ring (5), and the third O-ring (7) from the fixture. Then install the filter element inside the fixture and fix the medium outlet end of the filter element to the upper end cover (3). Add a plug to the threaded hole of the upper end cover (3). Immerse the fixture and the filter element together in industrial alcohol. Input compressed air through the threaded hole of the lower end cover (9) and observe the bubbling state on the outer surface of the filter element.
7. A tool for testing filter cartridges as defined in claim 1, applied to the opening and closing test of filter cartridge bypass valve, characterized in that, Install the filter element in the cavity of the filter cartridge (6), and fix the medium outlet end of the filter element to the upper end cover (3). Connect the threaded holes of the upper end cover (3) and the lower end cover (9) to the pipeline of the test bench. Input hydraulic oil through the threaded hole of the lower end cover (9) and adjust the pressure. Observe the opening status of the bypass valve. After the bypass valve is fully opened, stabilize the input pressure of the lower end cover (9) and record the pressure value and the opening status of the bypass valve. Then input hydraulic oil through the threaded hole of the upper end cover (3) and adjust the pressure. Observe the closing status of the bypass valve and the pressure difference between the upper end cover (3) and the lower end cover (9).
8. A tool for testing filter cartridges as defined in claim 1, for use in filter cartridge type testing, characterized in that, Install the filter element in the cavity of the filter cartridge (6), and fix the medium outlet end of the filter element to the upper end cover (3). Connect the threaded holes of the upper end cover (3) and the lower end cover (9) to the test bench pipeline. Operate the test bench to carry out various type tests according to the test requirements.