Wet-type gas front filter cartridge

Abstract

The utility model belongs to the technical field of gas filtering devices, and particularly relates to a wet-type gas front filter cartridge which comprises a vertical cartridge body, a closed filtering cavity is formed in the cartridge body, a gas inlet channel is formed in the bottom end of the cartridge body, a gas outlet channel is formed in the top end of the cartridge body, and the gas inlet channel and the gas outlet channel are both communicated with the filtering cavity. The lower part of the filter cavity is filled with filtrate, the upper part of the filter cavity is provided with an oil-water filter module connected with the air outlet channel, and the oil-water filter module is not contacted with the filtrate. The wet-type gas front filter cartridge disclosed by the utility model is connected in series with the existing single-cartridge filter structure for use, so that the filter burden can be dispersed, and a part of water-soluble or water-adsorbed particles, oil and other water-soluble substances can be filtered out in advance, thereby improving the overall filter effect, being beneficial to reducing the burden of subsequent filter materials, and reducing the production cost. The service life of a subsequent filter material is prolonged.

Description

Technical Field

[0001] This utility model relates to a wet gas pre-filter cartridge, belonging to the technical field of gas filtration devices. Background Technology

[0002] An air respirator is a self-contained open-circuit breathing apparatus used to ensure the safety and effectiveness of firefighters or rescue personnel in various environments such as dense smoke, toxic gases, steam, or oxygen deficiency during firefighting, rescue, and medical operations. If the quality of the gas supplied by the respirator is substandard or contaminated, it will directly impact the life and health of the user. Therefore, the high-pressure air filtration system is a critical safety barrier for air respirators, and its filtration efficiency, stability, and reliability are of paramount importance.

[0003] Utility model patent CN218166358U discloses a reusable high-pressure filter cartridge that can intercept and filter some oil and water molecules. However, it is a single-cartridge filter, which can only achieve basic physical interception, and all pollutants are filtered through this cartridge, resulting in a heavy workload on the filter element. Therefore, it is necessary to design a pre-filter cartridge that can be used in series with it to distribute the filtration load and improve the overall filtration effect. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a wet gas pre-filter cartridge for use in series with the existing single-tube filter structure, so as to distribute the filtration burden, improve the interception and filtration effect of pollutants in high-pressure air, and ensure the air supply quality of the air respirator.

[0005] The wet gas pre-filter cartridge of this utility model includes a vertical cylinder body, inside which is a closed filter chamber. An air inlet channel is provided at the bottom of the cylinder body, and an air outlet channel is provided at the top. Both the air inlet channel and the air outlet channel are connected to the filter chamber. The lower part of the filter chamber is filled with filtrate, and the upper part of the filter chamber is provided with an oil-water filter module connected to the air outlet channel. The oil-water filter module does not come into contact with the filtrate.

[0006] Compressed gas passes through a pre-filter cartridge, which filters out some water-soluble or water-adsorbed particulate matter, oil, and other water-soluble substances. The undissolved oil and gas are then filtered through the top oil-water filtration module, which removes dust and oil mist particles larger than 5μm. This helps reduce the load on subsequent filter media, extends their lifespan, and improves overall filtration efficiency.

[0007] Furthermore, the top and bottom of the cylinder are respectively provided with an upper end cover and a lower end cover, both of which are removable for better filter material; the air outlet channel is located inside the upper end cover, and the air inlet channel is located inside the lower end cover.

[0008] The oil-water filtration module includes a filter element mounting base and an oil suction filter element. The filter element mounting base is detachably connected to the air outlet channel, and the oil suction filter element is detachably connected to the filter element mounting base. The filter element mounting base has a through airflow channel, which is connected to the air outlet channel. The gas filtered by the oil suction filter element in the filtration chamber enters the air outlet channel through the airflow channel.

[0009] Preferably, the cavity formed by the oil-absorbing filter element and the filter element mounting base is filled with porous water-absorbing packing material to absorb the water vapor in the filtrate carried by the gas; a packing interception net is provided at the airflow channel inlet of the filter element mounting base.

[0010] Preferably, the air intake channel is connected to an aerator, which has several micro-holes that can break the gas into tiny bubbles, facilitating full contact with the filtered water.

[0011] Preferably, the cylinder is provided with an inlet and an overflow outlet, which are at the same height for adding filtrate.

[0012] Preferably, the bottom of the cylinder is provided with a drain port for draining the filtrate.

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

[0014] 1. Distributing the filtration burden and improving filtration efficiency: When compressed gas passes through the pre-filter cartridge, it first undergoes preliminary filtration through the filtrate, and then further filtration through the top oil-water filtration module. This removes dust and oil mist particles larger than 5μm, thus ensuring the quality of air supplied to the breathing apparatus. By using it in series with existing single-tube filter structures, this novel wet gas pre-filter cartridge can distribute the filtration burden, allowing some water-soluble or water-adsorbed particles, oil, and other water-soluble substances to be filtered out first. This improves the overall filtration efficiency, helps reduce the burden on subsequent filter media, and extends the service life of subsequent filter media.

[0015] 2. Flexible structure and easy maintenance: The top and bottom of the cylinder are equipped with removable upper and lower end covers, respectively, facilitating filter media replacement and maintenance. Additionally, the filter element mounting base and oil suction filter element of the oil-water filtration module are also removable, further simplifying filter element replacement and cleaning.

[0016] 3. Absorbing moisture and preventing secondary pollution: The cavity formed by the oil suction filter element and the filter element mounting base is filled with porous water-absorbing packing, which is used to absorb the water vapor in the filtrate carried by the gas, preventing water vapor from entering the subsequent filter material or breather, causing secondary pollution or affecting the performance of the filter material. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0018] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0019] Figure 3 yes Figure 1 A magnified view of part B in the middle;

[0020] Figure 4 This is a structural diagram of the upper cover;

[0021] Figure 5 This is a schematic diagram of the filter element mounting base;

[0022] Figure 6 This is a schematic diagram of the oil suction filter element;

[0023] Figure 7 This is a schematic diagram of the bubbler.

[0024] In the diagram: 1. Top cover; 2. Air outlet; 3. Filter element mounting base; 4. Packing interceptor; 5. Porous water-absorbing packing; 6. Oil-absorbing filter element; 7. Cylinder; 8. Water inlet; 9. Overflow outlet; 10. Filtrate; 11. Aerator; 12. Drain outlet; 13. Bottom cover; 14. Air inlet. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments.

[0026] 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.

[0027] like Figures 1-7 As shown, this embodiment is achieved through the following technical solution: a wet gas pre-filter cartridge includes a vertical cylinder 7, with an upper end cover 1 and a lower end cover 13 at the top and bottom of the cylinder 7, respectively. Both the upper end cover 1 and the lower end cover 13 are detachable. The cylinder 7 contains a closed filter chamber. The bottom of the cylinder 7 is provided with an air inlet channel 14, and the top is provided with an air outlet channel 2. The air outlet channel 2 is located inside the upper end cover 1, and the air inlet channel 14 is located inside the lower end cover 13. Both the air inlet channel 14 and the air outlet channel 2 are connected to the filter chamber. The lower part of the filter chamber is filled with filtrate 10, and the upper part of the filter chamber is provided with an oil-water filter module connected to the air outlet channel 2. The oil-water filter module does not contact the filtrate 10.

[0028] The oil-water filtration module of this embodiment includes a filter element mounting base 3 and an oil-absorbing filter element 6. The filter element mounting base 3 is detachably connected to the air outlet channel 2, and the oil-absorbing filter element 6 is detachably connected to the filter element mounting base 3. The filter element mounting base 3 has a through airflow channel that communicates with the air outlet channel 2. The gas filtered by the oil-absorbing filter element 6 in the filtration chamber enters the air outlet channel 2 through the airflow channel. In addition, the cavity formed by the oil-absorbing filter element 6 and the filter element mounting base 3 is filled with porous water-absorbing packing material 5, such as aluminosilicate or activated alumina with a uniform microporous structure. A packing interception mesh 4 is provided at the inlet of the airflow channel of the filter element mounting base 3.

[0029] In this embodiment, the air intake channel 14 is connected to an aerator 11, and the aerator 11 has several micro-holes.

[0030] In this embodiment, the cylinder 7 is provided with an inlet 8 and an overflow 9, which are at the same height. The bottom of the cylinder 7 is provided with a drain port 12. The inlet 8, overflow 9 and drain port 12 are all equipped with valve assemblies (not shown in the figure) to enable opening and closing.

[0031] This utility model is used in series with the existing single-cylinder filter structure. When the compressed gas passes through the pre-filter cylinder, it is first filtered by the filtrate, and then further filtered by the oil-water filter module at the top. It can filter and remove dust and oil mist particles larger than 5μm, which can distribute the filtration burden of the subsequent filter cylinders, improve the overall filtration effect, and thus ensure the quality of the air supply of the air respirator.

[0032] 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 wet gas pre-filter cartridge, characterized in that, It includes a vertical cylinder (7), inside which is a closed filter chamber. The bottom of the cylinder (7) is provided with an air inlet channel (14) and the top is provided with an air outlet channel (2). Both the air inlet channel (14) and the air outlet channel (2) are connected to the filter chamber. The lower part of the filter chamber is filled with filtrate (10), and the upper part of the filter chamber is provided with an oil-water filter module connected to the air outlet channel (2). The oil-water filter module does not contact the filtrate (10).

2. The wet gas pre-filter cartridge according to claim 1, characterized in that, The top and bottom of the cylinder (7) are respectively provided with an upper end cover (1) and a lower end cover (13). Both the upper end cover (1) and the lower end cover (13) are detachable. The air outlet channel (2) is located inside the upper end cover (1), and the air inlet channel (14) is located inside the lower end cover (13).

3. The wet gas pre-filter cartridge according to claim 1 or 2, characterized in that, The oil-water filtration module includes a filter element mounting base (3) and an oil suction filter element (6). The filter element mounting base (3) is detachably connected to the air outlet channel (2). The oil suction filter element (6) is detachably connected to the filter element mounting base (3). The filter element mounting base (3) is provided with a through airflow channel. The airflow channel is connected to the air outlet channel (2). The gas filtered by the oil suction filter element (6) in the filtration chamber enters the air outlet channel (2) through the airflow channel.

4. The wet gas pre-filter cartridge according to claim 3, characterized in that, The cavity formed by the oil suction filter element (6) and the filter element mounting base (3) is filled with porous water-absorbing packing (5); a packing interception net (4) is provided at the airflow channel inlet of the filter element mounting base (3).

5. The wet gas pre-filter cartridge according to claim 1 or 2, characterized in that, The air intake channel (14) is connected to an aerator (11), and the aerator (11) has several micro-holes.

6. The wet gas pre-filter cartridge according to claim 1 or 2, characterized in that, The cylinder (7) is provided with an inlet (8) and an overflow (9), and the inlet (8) and the overflow (9) are at the same height.

7. The wet gas pre-filter cartridge according to claim 1 or 2, characterized in that, The bottom of the cylinder (7) is provided with a drain outlet (12).

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