Final filter cartridge with filter element replacement convenience

Abstract

The utility model belongs to gas filter technical field, concretely relates to a last stage filter cartridge convenient to replace filter material, including the cylinder, be equipped with the cylindrical filter core subassembly with same coaxial arrangement in the cylinder, leave the gap between cylindrical filter core subassembly and the inner wall of cylinder, be equipped with the air inlet on the lateral wall of cylinder, the bottom of cylinder is equipped with the air outlet, the cylindrical filter core subassembly includes filter core and filter core sleeve, filter core is located in filter core sleeve, filter core sleeve top end opening, bottom end is connected with the air outlet through the connecting assembly, connecting assembly inserts into the air outlet, and the positive airflow pressure joint is dense through, the air inlet air current level blows to filter core sleeve, and then enters filter core from filter core sleeve top end, and is discharged from the air outlet after filter core, when needing to replace filter core, filter core assembly is separated from the air outlet conveniently, and after completing filter core replacement, it can be inserted into the air outlet again quickly, and the positive airflow can be automatically pressure joint dense when working, and it is not necessary to have complicated tool and complicated operation steps, and work efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a final-stage filter cartridge that facilitates filter media replacement, and belongs to the field of gas filtration technology. Background Technology

[0002] As a self-contained open-type breathing apparatus, the air respirator is designed for firefighters and rescue workers to help them carry out firefighting, rescue operations and missions safely and efficiently in extreme environments such as dense smoke, toxic gases or oxygen shortages.

[0003] Because the quality of the gas delivered by a respirator is closely related to the user's life safety, the high-pressure air filtration system, as the core safety barrier of the respirator, bears the crucial responsibility of purifying the gas entering the respirator, ensuring that the gas is pure, uncontaminated, and meets safety standards. The reliability and stability of this system are of paramount importance to ensuring user safety.

[0004] The filter cartridge in this application is the last link in the high-pressure air filtration system, removing residual oil and water vapor and odors from the gas, and requires frequent filter replacement. Utility Model Content

[0005] This invention provides a final-stage filter cartridge that facilitates filter media replacement, thus meeting the needs of frequent filter element replacement.

[0006] The present invention relates to a final-stage filter cartridge for easy replacement of filter media, comprising a vertical cylindrical body, a cylindrical filter element assembly coaxially arranged within the cylindrical body, a gap between the cylindrical filter element assembly and the inner wall of the cylindrical body, an air inlet on the side wall of the cylindrical body, and an air outlet at the bottom of the cylindrical body; the cylindrical filter element assembly comprises a filter element and a filter element sleeve, the filter element being located inside the filter element sleeve, the top end of the filter element sleeve being open, and the bottom end being connected to the air outlet via a connecting component, the connecting component being inserted into the air outlet and pressed tightly by a positive airflow; the airflow from the air inlet is blown horizontally toward the filter element sleeve, then enters the filter element from the top of the filter element sleeve, passes through the filter element, and is discharged from the air outlet.

[0007] The connecting assembly includes a sleeve seat, a cylindrical connector, and a plug-in connector. The sleeve seat is a stepped cylinder, with one end connected to the filter element sleeve and the other end connected to the cylindrical connector. The cylindrical connector has an internal thread, and one end of the plug-in connector is screwed into the cylindrical connector and the other end is inserted into the air outlet.

[0008] The cylinder of this utility model is provided with a detachable upper end cover and a lower end cover, respectively, and the air outlet is opened on the lower end cover.

[0009] The lower end of the side wall of the cylinder of this utility model is provided with a drain outlet, which is flush with the top surface of the lower end cap.

[0010] Preferably, the top surface of the lower end cover is inclined towards the drain outlet.

[0011] In addition, a water-retaining ring is provided on the filter sleeve, which is higher than the air inlet; a gap is left between the edge of the water-retaining ring and the inner wall of the cylinder.

[0012] Preferably, the water-blocking ring has a water-leaking hole.

[0013] The advantages of this utility model compared with the prior art are:

[0014] The final-stage filter cartridge of this utility model, which facilitates filter media replacement, features an ingenious structural design. Through the detachable upper and lower end caps and the unique design of the connecting components, operators can easily remove the upper or lower end cap according to the on-site installation situation when filter replacement is needed. This allows for easy removal of the filter cartridge from the air outlet, and after replacement, it can be quickly inserted back into the air outlet. Furthermore, the forward airflow automatically compresses and seals the filter during operation, eliminating the need for complex tools and cumbersome procedures. This significantly shortens filter replacement time and improves work efficiency, making it particularly suitable for applications requiring frequent filter replacement.

[0015] The drain outlet is flush with the top surface of the lower end cover, and the top surface of the lower end cover is designed as a conical structure that slopes towards the drain outlet. This allows water inside the cylinder to flow naturally and smoothly to the drain outlet and be discharged, effectively preventing water from accumulating inside the cylinder and preventing water from soaking and damaging the filter element. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0017] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0018] Figure 3 yes Figure 1 A magnified view of part B in the middle;

[0019] Figure 4 This is a schematic diagram of the water-retaining ring.

[0020] In the diagram: 1. Cylinder body; 2. Upper end cover; 3. Filter element; 4. Filter element sleeve; 5. Water baffle ring; 51. Leakage hole; 6. Air inlet; 7. Sleeve seat; 8. Cylindrical connector; 9. Insert connector; 10. Lower end cover; 11. Air outlet; 12. Drain outlet; 13. Conical mating surface. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments.

[0022] The description of this utility model is merely a structural or even functional description of the embodiments, and the scope of this utility model is not limited by the embodiments described herein.

[0023] like Figures 1-4 As shown, this embodiment is achieved through the following technical solution: a final-stage filter cartridge for easy replacement of filter media, comprising a vertical cylinder 1, with a detachable upper end cap 2 and a lower end cap 10 respectively located at the top and bottom of the cylinder 1. A cylindrical filter element assembly is coaxially arranged inside the cylinder 1, with a gap between the cylindrical filter element assembly and the inner wall of the cylinder 1. An air inlet 6 is located in the middle of the side wall of the cylinder 1, and a drain outlet 12 is located at the lower part of the side wall. The drain outlet 12 is flush with the top surface of the lower end cap 10, and the lower end cap 10 has an air outlet 11. The top surface of the lower end cap 10 is conical, facilitating the drainage of accumulated water from the drain outlet 12 on one side.

[0024] The cylindrical filter element assembly includes a filter element 3 and a filter element sleeve 4. The filter element 3 is located inside the filter element sleeve 4. The top end of the filter element sleeve 4 is open, and the bottom end is connected to the air outlet 11 through a connecting component. The connecting component is inserted into the air outlet 11 and is pressed tightly by the positive airflow. The airflow from the air inlet 6 blows horizontally toward the filter element sleeve 4, then enters the filter element 3 from the top end of the filter element sleeve 4, and is discharged from the air outlet 11 after passing through the filter element 3.

[0025] The connecting assembly includes a sleeve seat 7, a cylindrical connector 8, and a plug-in connector 9. The sleeve seat 7 is a stepped cylinder, with one end connected to the filter element sleeve 4 and the other end connected to the cylindrical connector 8. The cylindrical connector 8 has an internal thread. One end of the plug-in connector 9 is screwed into the cylindrical connector 8, and the other end is inserted into the air outlet 11. The plug-in connector 9 and the air outlet 11 are in contact through the conical mating surface 13 to increase the degree of compression and sealing.

[0026] A water-blocking ring 5 is provided on the filter sleeve 4. The water-blocking ring 5 is higher than the air inlet 6. A water leakage hole 51 is opened on the water-blocking ring 5. A gap is left between the edge of the water-blocking ring 5 and the inner wall of the cylinder 1.

[0027] The working principle of this utility model:

[0028] Gas enters through the inlet 6 in the middle of the cylinder 1, impacting the outer wall of the filter element sleeve 4. Moisture and oil particles that can be adsorbed on the surface of the cylinder will adhere to the outer wall and flow downwards along it. The gas flows upwards, entering from the top of the filter element sleeve 4, then flowing downwards through the filter element 3, and finally exiting from the outlet 11 at the bottom.

[0029] The water-retaining ring 5 is used to prevent the water and oil adhering to the outer wall of the filter element sleeve 4 from flowing upward under the action of airflow; a small amount of water and oil adhering to the outer wall of the filter element sleeve 4 above the water-retaining ring 5 can slide downward through the water leakage hole 51.

[0030] After a period of use, depending on the on-site installation conditions, the upper cover 2 or the lower cover 10 can be removed to pull the filter element assembly from the air outlet 11 for easy replacement of the filter element 3. After replacing the filter element 3, the filter element assembly can be directly inserted into the air outlet 11. During operation, it will be pressed tightly by the positive airflow, making it easy to disassemble and assemble.

[0031] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A final-stage filter cartridge for easy replacement of filter media, comprising a vertical cylindrical body (1), a cylindrical filter element assembly coaxially disposed within the cylindrical body (1), and a gap between the cylindrical filter element assembly and the inner wall of the cylindrical body (1), characterized in that, An air inlet (6) is provided on the side wall of the cylinder (1), and an air outlet (11) is provided at the bottom of the cylinder (1). The cylindrical filter element assembly includes a filter element (3) and a filter element sleeve (4). The filter element (3) is located inside the filter element sleeve (4). The top end of the filter element sleeve (4) is open, and the bottom end is connected to the air outlet (11) through a connecting component. The connecting component is inserted into the air outlet (11) and is pressed tightly by the positive airflow. The airflow from the air inlet (6) blows horizontally toward the filter element sleeve (4), and then enters the filter element (3) from the top end of the filter element sleeve (4). After passing through the filter element (3), it is discharged from the air outlet (11).

2. The final-stage filter cartridge for easy replacement of filter media according to claim 1, characterized in that, The connecting assembly includes a sleeve seat (7), a cylindrical connector (8), and a plug (9). The sleeve seat (7) is a stepped cylinder, with one end connected to the filter sleeve (4) and the other end connected to the cylindrical connector (8). The cylindrical connector (8) has an internal thread, and one end of the plug (9) is screwed into the cylindrical connector (8) and the other end is inserted into the air outlet (11).

3. The final-stage filter cartridge for easy replacement of filter media according to claim 2, characterized in that, The cylinder (1) is provided with a detachable upper end cover (2) and a lower end cover (10) respectively, and the air outlet (11) is opened on the lower end cover (10).

4. The final-stage filter cartridge for easy replacement of filter media according to claim 3, characterized in that, The lower end of the side wall of the cylinder (1) is provided with a drain outlet (12), which is flush with the top surface of the lower end cover (10).

5. The final-stage filter cartridge for easy replacement of filter media according to claim 4, characterized in that, The top of the lower end cap (10) is inclined towards the drain outlet (12).

6. The final-stage filter cartridge for easy replacement of filter media according to claim 1, characterized in that, The filter sleeve (4) is provided with a water-blocking ring (5), which is higher than the air inlet (6); there is a gap between the edge of the water-blocking ring (5) and the inner wall of the cylinder (1).

7. The final-stage filter cartridge for easy replacement of filter media according to claim 6, characterized in that, The water-blocking ring (5) has a water-leaking hole (51).

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