Oil-gas separation filter

Abstract

The utility model relates to the technical field of filters, and provides an oil-gas separation filter which comprises a shell and a first filtering piece, an inner cavity with a closed end and an open end is defined by the shell, a connecting part is arranged in the inner cavity, and the first filtering piece is suitable for stretching into the inner cavity through the open end; and the first filtering piece extending into the inner cavity is detachably connected with the connecting part. According to the oil-gas separation filter disclosed by the invention, the connecting part is arranged in the inner cavity for accommodating the first filter part, and the first filter part is detachably connected with the connecting part, so that compared with a known oil-gas separation filter device, the assembly process of the first filter part is greatly simplified, and the assembly efficiency of the oil-gas separation filter is improved. A large number of parts used for installing the first filtering piece are omitted, so that the whole oil-gas separation filter is simpler in structure and fewer in parts, the assembling process during manufacturing of the oil-gas separation filter is simplified, and the manufacturing cost of the oil-gas separation filter is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of filters, and in particular to an oil-gas separation filter. Background Art

[0002] The contents of this section merely provide background information related to the present application and may not constitute prior art.

[0003] It is known that when a hydrogen peroxide plasma sterilizer is in use, the hydrogen peroxide gas drawn from the sterilization chamber by the vacuum pump will mix with the lubricating oil in the vacuum pump to form an oil-gas mixture when flowing through the vacuum pump. Before such oil-gas mixture is discharged, it is often necessary to filter it with an oil-gas separation filter to separate the lubricating oil in the oil-gas mixture for recycling, and to purify the hydrogen peroxide gas separated from the oil-gas mixture, so as to avoid polluting the air after direct discharge of the hydrogen peroxide gas.

[0004] To this end, the applicant has previously applied for a patent with application number CN2021212653856, which discloses an oil-gas separation device suitable for filtering the above-mentioned oil-gas mixture. Although the oil-gas separation device can effectively improve the filtering effect of the oil-gas mixture, the assembly process of the annular filter located in the inner cavity and used to separate the lubricating oil is relatively cumbersome, and the structure of the entire oil-gas separation device is relatively complex and has many parts. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide an oil-gas separation filter with a simpler structure and easier assembly.

[0006] The purpose of this application is achieved through the following technical solutions:

[0007] An oil-gas separation filter, comprising:

[0008] The shell defines an inner cavity; the inner cavity has a closed end and an open end opposite to the closed end, and a connecting portion is provided inside the inner cavity;

[0009] The first filter element is suitable for extending into the inner cavity through the opening end, and the first filter element extending into the inner cavity is detachably connected to the connecting portion.

[0010] In some possible embodiments, the first filter element extending into the inner cavity is threadedly connected to the connecting portion.

[0011] In some possible embodiments, the connecting portion is a stud disposed at the closed end and facing the open end, and the first filter element is provided with a threaded hole adapted to the stud.

[0012] In some possible embodiments, the shell further defines an outer cavity located outside the inner cavity, and the outer cavity is connected to the inner cavity through a guide port;

[0013] The oil-gas separation filter also includes a second filter element, and the second filter element is arranged in the outer cavity.

[0014] In some possible embodiments, the outer cavity is arranged around the inner cavity, and the end of the outer cavity corresponding to the closed end is a closed structure, and the end of the outer cavity corresponding to the open end is an open structure;

[0015] The second filter element comprises a carrying ring and a filter material, the carrying ring is arranged inside the outer cavity, a containing cavity is formed between the carrying ring and one closed end of the outer cavity, the guide port is communicated with the containing cavity, and the carrying ring is provided with an air outlet communicated with the containing cavity;

[0016] The filter material is arranged in the accommodating cavity and supported by the carrying ring.

[0017] In some possible embodiments, the guide port is disposed close to the closed end, and the guide port is a plurality of guide holes that are sequentially disposed in a circumferential direction around the inner cavity.

[0018] In some possible embodiments, the first filter element includes a base and a filter element;

[0019] The filter element is arranged on the base, and the filter element is suitable for being detachably connected to the connecting portion after being extended into the inner cavity through the opening end; when the filter element is extended into the inner cavity, the base can block the opening end;

[0020] The filter element has a diffusion cavity; the base is provided with a joint communicating with the diffusion cavity, and an oil return port communicating with the inner cavity.

[0021] In some possible embodiments, the filter element is threadedly connected to the joint;

[0022] A bearing portion protruding toward the filter element is provided on the base located at the periphery of the joint, and the filter element is carried on the bearing portion to form a gap between the filter element and the base, and the oil return port is connected to the gap.

[0023] In some possible embodiments, a sealing member is disposed on the periphery of the bearing portion.

[0024] In some possible embodiments, a locking screw for locking the filter element is also provided on the base.

[0025] The technical solution of the embodiment of the present application has at least the following advantages and beneficial effects:

[0026] The oil-gas separation filter disclosed in the present application improves the assembly method of the first filter element by providing a connecting portion in the inner cavity for accommodating the first filter element, and allowing the first filter element to be detachably connected to the connecting portion. Compared with the known oil-gas separation filter device, the assembly process of the first filter element is greatly simplified, and a large number of parts for installing the first filter element are eliminated, thereby making the structure of the entire oil-gas separation filter simpler and having fewer parts, which is beneficial to simplifying the assembly process during the manufacture of the oil-gas separation filter and reducing the manufacturing cost of the oil-gas separation filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of an oil-gas separation filter provided in some embodiments of the present application;

[0028] Figure 2 for Figure 1 A top view of the oil-gas separation filter is shown;

[0029] Figure 3 for Figure 2 Sectional view along AA direction;

[0030] Figure 4 for Figure 3 A partial enlarged view of the oil-gas separation filter shown in FIG.

[0031] Figure 5 for Figure 3 A cross-sectional view of a housing of an oil-gas separation filter shown in FIG.

[0032] Icons: 10-shell, 11-inner cavity, 12-outer cavity, 13-guide port, 14-top cover, 15-inner shell, 16-outer shell, 17-connecting part, 20-first filter element, 21-base, 211-bearing part, 22-filter element, 221-diffusion chamber, 23-connector, 24-oil return port, 25-seal, 26-locking screw, 30-second filter element, 31-bearing ring, 311-air outlet, 32-filter material. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific implementation methods. The same figure marks in the accompanying drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] Compared to the embodiments shown in the drawings, feasible implementations within the scope of protection of the present application may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0035] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by persons having ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not necessarily indicate a quantitative limitation.

[0036] An embodiment of the present application discloses an oil-gas separation filter. The oil-gas separation filter disclosed in the embodiment of the present application can be applied to a hydrogen peroxide plasma sterilizer to filter an oil-gas mixture containing hydrogen peroxide gas and lubricating oil discharged from a vacuum pump of the hydrogen peroxide plasma sterilizer, thereby separating the lubricating oil in the oil-gas mixture for recycling, and at the same time, purifying the hydrogen peroxide gas separated from the oil-gas mixture before discharging it.

[0037] For details, please refer to Figures 1 to 3 ,in, Figure 1 The schematic diagram of the structure of the exemplary oil-gas separation filter disclosed in the embodiment of the present application is shown. Figure 2 for Figure 1 A top view of the oil-gas separation filter is shown. Figure 3 for Figure 2 The cross-sectional view taken along the AA axis shows the internal structure of the oil-gas separation filter. In general, the oil-gas separation filter disclosed in the embodiment of the present application may include a housing 10, a first filter element 20 for separating lubricating oil, and a second filter element 30 for purifying hydrogen peroxide gas.

[0038] In the embodiment of the present application, the housing 10 is used to provide a mounting carrier and protection for the first filter element 20 and the second filter element 30. Figure 3 or Figure 5As shown, the housing 10 defines an inner cavity 11 and an outer cavity 12 located outside the inner cavity 11, and the outer cavity 12 is connected to the inner cavity 11 through a flow guide 13. The inner cavity 11 can be a downwardly open chamber, so that the inner cavity 11 has a closed end and an open end opposite to the closed end, and the inner cavity 11 is suitable for accommodating the first filter element 20; the outer cavity 12 can also be a downwardly open chamber, so that the end of the outer cavity 12 corresponding to the closed end of the inner cavity 11 is a closed structure, and the end of the outer cavity 12 corresponding to the open end of the inner cavity 11 is an open structure, and the outer cavity 12 is suitable for accommodating the second filter element 30.

[0039] Specifically, Figure 5 As shown, the shell 10 may be a cylindrical structure with one end closed and the other end open, and the shell 10 may further include a top cover 14, an inner shell 15, and an outer shell 16 arranged around the inner shell 15. Among them, one end of the inner shell 15 and the outer shell 16 are both connected to the top cover 14, and the other ends of the inner shell 15 and the outer shell 16 are both open structures. At this time, the interior of the inner shell 15 can be used as the inner cavity 11 mentioned above, and the chamber between the inner shell 15 and the outer shell 16 is used as the outer cavity 12 mentioned above, and at this time the outer cavity 12 is arranged around the inner cavity 11. In actual implementation, the various components constituting the shell 10 can be an integrated structure or a separate component, which is not limited here.

[0040] On this basis, in order to simplify the assembly process of the first filter element 20 used to separate the lubricating oil in the oil-gas mixture, Figure 3 and Figure 5 As shown in the figure, a connecting portion 17 is further provided inside the inner cavity 11. The first filter element 20 is adapted to be inserted into the inner cavity 11 through the opening end of the inner cavity 11, and the first filter element 20 inserted into the inner cavity 11 is detachably connected to the connecting portion 17. In other words, when the first filter element 20 needs to be installed into the inner cavity 11, it is only necessary to insert the first filter element 20 into the inner cavity 11 through the opening at the bottom of the inner cavity 11, and connect the first filter element 20 inserted into the inner cavity 11 to the connecting portion 17.

[0041] It can be understood that the above-mentioned setting method is used to achieve the installation and fixation of the first filter element 20. Compared with the known oil-gas separation filter device disclosed in the patent technology listed in the background technology of this application, the assembly process of the first filter element 20 is greatly simplified, and a large number of parts used to install the first filter element 20 are eliminated, thereby making the structure of the entire oil-gas separation filter simpler and with fewer parts, which is beneficial to simplify the assembly process during the manufacture of the oil-gas separation filter and reduce the manufacturing cost of the oil-gas separation filter.

[0042] It should be noted that, in actual implementation, there are many ways to achieve the detachable connection between the first filter element 20 and the connecting portion 17. For example, the first filter element 20 and the connecting portion 17 can be connected by conventional detachable connection methods such as snap connection or threaded connection. Considering that the oil-gas separation filter may need to replace the first filter element 20 during actual application, in some embodiments of the present application, the first filter element 20 extending into the inner cavity 11 is threadedly connected to the connecting portion 17.

[0043] Further, combined with Figure 3 and Figure 5 As shown in the content, the connection part 17 can be a stud arranged at the closed end of the inner cavity 11 and facing the open end. In this case, a threaded hole adapted to the stud is provided on the first filter element 20. In this way, when the first filter element 20 extends into the inner cavity 11 through the open end of the inner cavity 11, the first filter element 20 can be connected to the stud through the threaded hole. It can be understood that setting the connection part 17 at the closed end of the inner cavity 11 and further setting the connection part 17 as a stud not only further simplifies the assembly process of the first filter element 20, but also facilitates the rapid removal of the first filter element 20 when the first filter element 20 needs to be replaced, and can avoid the connection part 17 from occupying the limited space of the inner cavity 11 as much as possible, making the structure of the entire oil-gas separation filter more compact.

[0044] In order to separate the lubricating oil from the aforementioned oil-gas mixture by using the first filter element 20, in some embodiments of the present application, the first filter element 20 may further include a base 21 and a filter element 22 disposed on the base 21. Figure 3 and Figure 4 As shown, the filter element 22 is suitable for being inserted into the inner cavity 11 through the opening end of the inner cavity 11 and then being detachably connected to the connecting portion 17. That is to say, the threaded hole provided on the first filter element 20 mentioned above can be specifically provided at the end of the filter element 22 away from the base 21, and when the filter element 22 is inserted into the inner cavity 11 and connected to the connecting portion 17, the base 21 can block the opening end of the inner cavity 11 to prevent the hydrogen peroxide gas in the oil-gas mixture from flowing out from the opening end of the inner cavity 11. The filter element 22 can be an oil mist filter element, and the filter element 22 inserted into the inner cavity 11 can form an annular gap with the inner wall of the inner cavity 22, so that the hydrogen peroxide gas in the oil-gas mixture can flow smoothly in the inner cavity 11.

[0045] At the same time, the filter element 22 has a diffusion cavity 221 inside, and the base 21 is provided with a joint 23 and an oil return port 24. The joint 23 is connected to the diffusion cavity 221 of the filter element 22, and the oil return port 24 can be connected to the inner cavity 11. In this way, in actual application, the joint 23 is connected to the exhaust port of the vacuum pump of the hydrogen peroxide plasma sterilizer, so that the oil-gas mixture discharged by the vacuum pump can flow into the diffusion cavity 221 inside the filter element 22 through the joint 23, and then the oil-gas mixture can diffuse inside the diffusion cavity 221 and pass through the filter element 22, and the lubricating oil in the oil-gas mixture can be filtered out by the filter element 22, so that the oil-gas mixture is divided into lubricating oil and hydrogen peroxide gas. For the separated lubricating oil, the lubricating oil located on the outer wall of the filter element 22 will flow downward along the outer wall of the filter element 22 and finally flow out from the oil return port 24 for recycling, and the lubricating oil located in the diffusion cavity 221 of the filter element 22 can flow back to the vacuum pump from the joint 23 again for recycling.

[0046] In some embodiments of the present application, the filter element 22 is threadedly connected to the joint 23 to simplify the process of installing the filter element 22 on the base 21. In addition, a bearing portion 211 protruding toward the filter element 22 is also provided on the base 21 located outside the joint 23, and the filter element 22 is supported on the bearing portion 211 to form a gap between the filter element 22 and the base 21, and the oil return port 24 is connected to the gap. It can be understood that by providing the bearing portion 211 protruding toward the filter element 22 and used to support the filter element 22, it is beneficial for the lubricating oil flowing to the bottom of the filter element 22 to flow out smoothly from the oil return port 24, so as to avoid the accumulation of lubricating oil at the bottom of the filter element 22 as much as possible.

[0047] At the same time, combined Figure 4 As shown in the figure, a seal 25 can also be arranged on the periphery of the bearing part 211. At this time, the bottom of the filter element 22 presses against the seal 25 to improve the sealing performance of the connection between the filter element 22 and the joint 23, and to prevent the lubricating oil from flowing out of the connection between the filter element 22 and the joint 23 as much as possible. The seal 25 can be a known annular seal. In addition, a locking screw 26 for locking the filter element 22 can be further arranged on the base 21. By pressing the locking screw 26 against the outer wall of the filter element 22, the filter element 22 connected to the joint 23 can be prevented from being easily displaced, and the stability of the filter element 22 can be further improved.

[0048] In order to utilize the second filter element 30 to purify the hydrogen peroxide gas separated from the oil-gas mixture, in some embodiments of the present application, the second filter element 30 is disposed in the outer cavity 12. After the oil-gas mixture is filtered by the filter element 22 of the first filter element 20 to be separated into hydrogen peroxide gas and lubricating oil, the hydrogen peroxide gas located in the inner cavity 11 can enter the outer cavity 12 through the aforementioned guide port 13, thereby relying on the second filter element 30 to purify the hydrogen peroxide gas, and the purified gas will flow out from the opening of the outer cavity 12.

[0049] Further, combined with Figure 3 and Figure 4 As shown, the second filter element 30 may further include a bearing ring 31 and a filter material 32. The bearing ring 31 is arranged inside the outer cavity 12, and a receiving cavity is formed between the bearing ring 31 and the closed end of the outer cavity 12, the flow guide 13 is connected to the receiving cavity, the bearing ring 31 is provided with an air outlet 311 connected to the receiving cavity, and the filter material 32 is arranged in the receiving cavity and supported by the bearing ring 31. The filter material 32 may be, but is not limited to, activated carbon encapsulated in the outer cavity 12, and the bearing ring 31 may be pasted to the bottom of the activated carbon by pasting, and the bearing ring 31 may be threadedly connected to the inner shell 15 of the shell 10 to realize the installation and fixation of the bearing ring 31. This method can simplify the assembly process of the second filter element 30 as much as possible. When the activated carbon used as the filter material 32 reaches the service life, the activated carbon used as the filter material 32 can be replaced by replacing the entire shell 10.

[0050] In this way, after the oil-gas mixture is filtered by the filter element 22 of the first filter element 20 to be separated into hydrogen peroxide gas and lubricating oil, the hydrogen peroxide gas in the inner cavity 11 can enter the accommodating cavity through the guide port 13, and the hydrogen peroxide gas entering the accommodating cavity will pass through the filter material 32 to be purified, and the purified gas can flow out from the gas outlet 311 on the carrier ring 31, and finally flow out from the opening of the outer cavity 12. Among them, the gas outlet 311 provided on the carrier ring 31 can be a plurality of holes arranged in sequence along the circumference of the carrier ring 31, so that the gas purified by the filter material 32 can flow out evenly.

[0051] It is understandable that in actual implementation, Figure 5As shown, the aforementioned flow guide port 13 for connecting the inner cavity 11 and the outer cavity 12 can be arranged near the closed end of the inner cavity 11, so as to extend the flow distance of the hydrogen peroxide gas entering the accommodating cavity as much as possible, thereby facilitating the improvement of the purification effect of the hydrogen peroxide gas by using the filter material 32. In addition, the flow guide port 13 can further be a plurality of flow guide holes arranged in sequence around the circumference of the inner cavity 11, so as to make the hydrogen peroxide gas in the inner cavity 11 flow into the accommodating cavity as evenly as possible, so that the filter material 32 can be more fully utilized, thereby further improving the purification effect of the hydrogen peroxide gas by using the filter material 32.

[0052] It should be noted that, with regard to the oil-gas separation filter disclosed in the embodiment of the present application, in addition to being used in a hydrogen peroxide plasma sterilizer to filter an oil-gas mixture composed of hydrogen peroxide gas and lubricating oil, it can also be used in other scenarios where similar oil-gas mixtures need to be filtered, and this is not limited here.

[0053] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An oil-gas separation filter, characterized in that: include: The shell defines an inner cavity; the inner cavity has a closed end and an open end opposite to the closed end, and a connecting portion is provided inside the inner cavity; A first filter element, adapted to extend into the inner cavity through the opening end, and the first filter element extending into the inner cavity is detachably connected to the connecting portion; The first filter element extending into the inner cavity is threadedly connected to the connecting portion, the connecting portion is a stud arranged at the closed end and facing the open end, and the first filter element is provided with a threaded hole adapted to the stud.

2. The oil-gas separation filter according to claim 1, characterized in that: The shell further defines an outer cavity located outside the inner cavity, and the outer cavity is connected to the inner cavity through a flow guide port; The oil-gas separation filter also includes a second filter element, and the second filter element is arranged in the outer cavity.

3. The oil-gas separation filter according to claim 2, characterized in that: The outer cavity is arranged around the inner cavity, the end of the outer cavity corresponding to the closed end is a closed structure, and the end of the outer cavity corresponding to the open end is an open structure; The second filter element comprises a carrying ring and a filter material, the carrying ring is arranged inside the outer cavity, a containing cavity is formed between the carrying ring and one closed end of the outer cavity, the guide port is communicated with the containing cavity, and the carrying ring is provided with an air outlet communicated with the containing cavity; The filter material is arranged in the accommodating cavity and supported by the carrying ring.

4. The oil-gas separation filter according to claim 2, characterized in that: The flow guide port is arranged close to the closed end, and the flow guide port is a plurality of flow guide holes arranged sequentially in the circumferential direction around the inner cavity.

5. The oil-gas separation filter according to claim 1, characterized in that: The first filter element comprises a base and a filter element; The filter element is arranged on the base, and the filter element is suitable for being detachably connected to the connecting portion after being extended into the inner cavity through the opening end; when the filter element is extended into the inner cavity, the base can block the opening end; The filter element has a diffusion cavity; the base is provided with a joint communicating with the diffusion cavity, and an oil return port communicating with the inner cavity.

6. The oil-gas separation filter according to claim 5, characterized in that: The filter element is threadedly connected to the joint; A bearing portion protruding toward the filter element is provided on the base located at the periphery of the joint, and the filter element is carried on the bearing portion to form a gap between the filter element and the base, and the oil return port is connected to the gap.

7. The oil-gas separation filter according to claim 6, characterized in that: A sealing member is disposed on the periphery of the bearing portion.

8. The oil-gas separation filter according to claim 5, characterized in that: The base is also provided with a locking screw for locking the filter element.

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