A breather valve

Abstract

This utility model discloses a vent valve, which includes a main body, a cap, a support frame, and a first oil-blocking component. A filter element is housed inside the main body; the support frame is fixed within the main body, and a vent membrane is connected to the main body via ultrasonic welding; the first oil-blocking component is disposed in a through-hole and located on the side away from the cap, with the filter element positioned between the first oil-blocking component and the support frame. The first oil-blocking component includes two first blocks, which are spaced apart relative to each other in the through-hole along its axial direction. The two first blocks gradually shift towards the axis of the through-hole along its axial direction away from the cap, and are arranged in a semi-circular shape. The two inclined first blocks in the first oil-blocking component effectively prevent the upward flow of liquid within the equipment and facilitate the return of liquid splashed to the top back into the equipment. Therefore, the vent valve can meet the usage requirements of equipment with higher demands for dust and water resistance, venting and pressure relief, and oil prevention.

Description

Technical Field

[0001] This utility model relates to the technical field of vent valve components, and in particular to a vent valve. Background Technology

[0002] A breather valve, as a device that allows gas to pass through while preventing liquids and solid particles from entering, is widely used in automobile manufacturing, motor and electronic control, power battery and new energy fields to maintain pressure balance inside and outside the equipment and provide waterproof and dustproof protection.

[0003] However, in certain critical equipment such as gearbox hydraulic systems, higher requirements are placed on vent valves. They not only need to be dustproof and waterproof, but also oil-proof and capable of venting and stabilizing pressure. Existing vent valve structures may have shortcomings in certain aspects, making it difficult to meet these multiple high requirements. Therefore, it is necessary to develop a new type of vent valve structure to better meet the needs of these devices in terms of oil resistance, waterproofing, dustproofing, and pressure relief. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a vent valve that improves the dustproof, waterproof, breathable, pressure-relieving, and oil-proof functions of the vent valve itself.

[0005] According to a first aspect embodiment of the present invention, the vent valve includes:

[0006] The main body has a through hole inside, the through hole including a filter cavity portion, the filter cavity portion being configured to accommodate a filter element;

[0007] A pipe cap is configured to cover one end of the body, and the other end of the body is provided with mounting threads, which are configured to mount the body.

[0008] A support frame, fixed within the tube cap, with a membrane paper disposed between the support frame and the tube cap, the membrane paper located within the through hole; and

[0009] The first oil-blocking component is disposed in the through hole and located on the side away from the cap. The filter element is located between the first oil-blocking component and the support frame. The first oil-blocking component includes two first blocks. The two first blocks are disposed at a distance from each other in the through hole along the axial direction of the through hole. The two first blocks are gradually offset towards the axis of the through hole along the axial direction away from the cap. The two first blocks are arranged in a semi-circular shape.

[0010] The vent valve according to the present invention has at least the following beneficial effects: the vent valve is provided with a first oil-blocking component, and two inclined first blocks in the first oil-blocking component are arranged relatively spaced apart along the axial direction of the through hole. While satisfying the vent valve's venting performance, the inclined blocks can better block the upward flow of liquid in the equipment, and also facilitate the return of liquid splashed to the top to the equipment. Therefore, the vent valve can meet the usage requirements of equipment with higher requirements for dust and water protection, venting and pressure relief, and oil prevention.

[0011] According to some embodiments of the present invention, the first oil-blocking component further includes a support rib, which is disposed on the main body and located in the through hole. The support rib extends along the axial direction of the through hole, one end of the support rib is connected to the two first blocks respectively, and the other end of the support rib is configured to abut against one end of the filter element.

[0012] According to some embodiments of the present invention, the gap between the adjacent ends of the two first blocks is 0.8 to 0.9 mm.

[0013] According to some embodiments of the present invention, the tilt angle of the two first blocks is 15°.

[0014] According to some embodiments of the present invention, a second oil-blocking component is also included. The inner wall of the main body has a platform, and the second oil-blocking component is detachably disposed on the platform. The second oil-blocking component is located between the first oil-blocking component and the filter element.

[0015] According to some embodiments of the present invention, the second oil-blocking component includes:

[0016] A mounting ring, wherein the mounting ring is disposed on the shelf, and the outer wall of the mounting ring abuts against the inner wall of the main body; and

[0017] Two second stop blocks are respectively disposed on the inner side of the mounting ring. The two second stop blocks are disposed at intervals relative to each other in the through hole along the axial direction of the through hole. The two second stop blocks are arranged in parallel and are semi-circular.

[0018] According to some embodiments of the present invention, a hexagonal flange is provided on the outer periphery of the main body, and the mounting thread is provided on the portion of the main body from the end away from the pipe cap to the hexagonal flange. A sealing groove is provided on the side of the hexagonal flange away from the pipe cap. The sealing groove is configured to accommodate a sealing ring. A protrusion is provided on the outer side of the sealing ring. The protrusion is configured to abut against the groove wall of the sealing groove.

[0019] According to some embodiments of the present invention, the filter element includes at least one layer of filter material.

[0020] According to some embodiments of the present invention, at least one vent groove is provided on the periphery of one end of the main body where the cap is installed.

[0021] According to some embodiments of this utility model, the membrane paper is an E-PTFE membrane.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of the vent valve according to an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 The diagram shows the exploded structure of the vent valve;

[0026] Figure 3 for Figure 1 A schematic diagram of a half-section of the vent valve is shown.

[0027] Figure 4 for Figure 1 A partial cross-sectional schematic diagram of the vent valve is shown.

[0028] Figure 5 for Figure 4 The diagram shows the structure of the sealing ring of the vent valve.

[0029] Icon labels:

[0030] 10 Main body; 11 Through hole; 12 Filter chamber; 13 Mounting thread; 14 Shelf; 15 Hexagonal flange; 16 Sealing ring; 161 Protrusion; 17 Ventilation groove;

[0031] pipe cap 20;

[0032] Support frame 30;

[0033] First oil-blocking component 40; First stop block 41; Support rib 42; Gap H;

[0034] Second oil baffle component 50; mounting ring 51; second stop block 52;

[0035] Film paper 60. Detailed Implementation

[0036] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0038] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0039] Reference Figures 1 to 4 According to a first aspect embodiment of the present invention, the vent valve includes a main body 10, a cap 20, a support frame 30, and a first oil baffle component 40. The main body 10 has a through hole 11 inside, which includes a filter chamber portion 12 configured to accommodate a filter element (not shown in the figure). The cap 20 is configured to cover one end of the main body 10, and the other end of the main body 10 has an installation thread 13 configured to install the main body 10. The support frame 30 is fixed in the cap 20, and a membrane paper 60 is provided between the support frame 30 and the cap 20, which is located inside the through hole 11. The first oil-blocking member 40 is disposed in the through hole 11 and located on the side away from the cap 20. The filter element is located between the first oil-blocking member 40 and the support frame 30. The first oil-blocking member 40 includes two first blocks, which are relatively spaced apart in the through hole 11 along the axial direction of the through hole 11. The two first blocks gradually shift towards the axis of the through hole 11 along the axial direction away from the cap 20, and the two first blocks are arranged in a semi-circular shape.

[0040] The vent valve of this invention effectively integrates multiple functions. The through-hole 11 within the main body 10 is designed with a filter chamber 12 to accommodate a filter element, effectively filtering impurities from the gas. The fit between the cap 20 and one end of the main body 10, and the mounting thread 13 at the other end of the main body 10, facilitate easy installation and sealing of the vent valve. The membrane paper 60 between the support frame 30 and the cap 20 further enhances the waterproof and dustproof performance of the vent valve. In particular, the design of the first oil-blocking component 40, which includes two relatively spaced first blocks 41 gradually offset towards the axis of the through-hole 11, effectively prevents liquid splashing while ensuring smooth gas passage. Overall, the vent valve of this invention has multiple functions including oil resistance, waterproofing, dustproofing, and venting / pressure relief, improving the reliability and service life of the equipment and meeting the high requirements of important equipment such as gearbox hydraulic systems.

[0041] Specifically, this embodiment provides a vent valve, the main body 10 of which has a through hole 11 inside. The through hole 11 includes a filter chamber 12 for placing a filter element. The filter element can filter out solid particles in the gas, ensuring the purity of the gas entering the equipment. One end of the main body 10 is covered with a cap 20, which fits tightly with the main body 10 to form an effective seal. The other end of the main body 10 is provided with an installation thread 13, which allows the vent valve to be easily installed on the equipment. A support frame 30 is fixed in the cap 20, and a membrane paper 60 is provided between the support frame 30 and the cap 20. The membrane paper 60 has good air permeability and waterproof performance, which can block the entry of liquid and fine particles while allowing gas to pass through. In the through hole 11, a first oil-blocking member 40 is provided on the side away from the cap 20. The first oil-blocking member 40 consists of two first blocks 41, which are arranged relatively spaced along the axial direction of the through hole 11 and gradually offset towards the axis of the through hole 11. The two first baffles 41 are arranged in a semi-circular shape. This structure can effectively prevent liquid from splashing out without excessively hindering the flow of gas. In this embodiment, the vent valve achieves multiple functions such as oil prevention, water prevention, dust prevention, and air permeability and pressure relief through the synergistic action of the filter element, membrane paper 60, and first oil-blocking component 40, meeting the high requirements of important equipment for vent valves.

[0042] Therefore, it is understood that the vent valve according to the embodiment of the present utility model has at least the following beneficial effects: the vent valve is provided with a first oil-blocking component 40, and two inclined first blocks 41 in the first oil-blocking component 40 are arranged relatively at intervals along the axial direction of the through hole 11. While satisfying the vent valve's venting performance, the inclined blocks can better block the upward flow of liquid in the equipment, and also facilitate the return of liquid splashed to the top to the equipment. Therefore, the vent valve can meet the usage requirements of equipment with higher requirements for dustproof and waterproof, venting and pressure relief, and oil prevention.

[0043] Reference Figures 3 to 4 In some embodiments of this utility model, the first oil-blocking component 40 further includes a support rib 42, which is disposed on the main body 10 and located in the through hole 11. The support rib 42 extends along the axial direction of the through hole 11, one end of the support rib 42 is connected to the two first blocks 41 respectively, and the other end of the support rib 42 is configured to abut against one end of the filter element.

[0044] Specifically, in the vent valve of this embodiment, the first oil-blocking component 40 not only includes two relatively spaced first blocks 41, but also incorporates a support rib 42. The support rib 42 is disposed on the main body 10 and located within the through hole 11, extending along the axial direction of the through hole 11 to form a stable structural support. One end of the support rib 42 is firmly connected to each of the two first blocks 41. This connection method not only enhances the overall strength of the first oil-blocking component 40 but also ensures the stable positioning of the first blocks 41 within the through hole 11. The other end of the support rib 42 is configured to abut against one end of the filter element. This design not only helps to fix the filter element within the filter chamber portion 12, preventing it from shifting into gaps during operation and causing blockage of the first oil-blocking component 40, but also effectively disperses the pressure borne by the filter element, extending its service life.

[0045] In practical applications, the presence of the support rib 42 enables the first oil-blocking component 40 to better resist pressure impacts from oil or other liquids, further enhancing the oil-proof performance of the vent valve. Simultaneously, the abutting action of the support rib 42 against one end of the filter element ensures the stable operation of the filter element during gas filtration, guaranteeing the vent valve's permeability and filtration efficiency. This design considers both the structural stability and durability of the vent valve, while also taking into account its practicality and economy. This makes the vent valve of this invention perform excellently in dustproofing, waterproofing, oilproofing, and pressure relief, making it suitable for various applications with high performance requirements for vent valves.

[0046] Reference Figures 3 to 4In some embodiments of this invention, the gap between the adjacent ends of the two first baffles 41 is 0.8 to 0.9 mm. To further optimize the oil-proof performance of the vent valve, the gap between the adjacent ends of the two first baffles 41 is set to 0.8 to 0.9 mm. In practical applications, when oil attempts to pass through the vent valve, it first encounters the obstruction of the first oil-blocking component 40. The tiny gap between the two first baffles 41 provides space for gas to pass through, but this gap is small enough to effectively block most of the oil from splashing out. At the same time, this gap is large enough to ensure smooth gas flow and prevent the vent valve's permeability from being affected by an excessively small gap. Specifically, a gap size of 0.8 to 0.9 mm ensures that, in most cases, oil molecules, due to surface tension and viscosity, are difficult to splash out of the device through this narrow channel. Gas molecules, due to their small size and high fluidity, can easily pass through this gap, achieving pressure balance inside and outside the device.

[0047] Reference Figures 3 to 4 In some embodiments of this utility model, the inclination angle of the two first baffles 41 is 15°. In the design of the vent valve, the inclination angle of the first oil-blocking component 40 has a crucial impact on its oil-proof performance. As can be seen from the above embodiments, the two first baffles 41 are designed to gradually shift towards the axis of the through hole 11 along the axial direction away from the cap 20, and their inclination angle is precisely controlled at 15°. In practical applications, when oil attempts to pass through the vent valve, it flows along the direction of the through hole 11 and encounters the obstruction of the first oil-blocking component 40. The two first baffles 41 are set at an inclination angle of 15°, so that the oil is subjected to a slanted resistance during the flow process. This slanted resistance not only increases the difficulty for the oil to pass through the vent valve, but also better blocks the upward surge of liquid inside the equipment, reducing the possibility of oil splashing directly out of the equipment. In addition, the 15° inclination angle also ensures the vent valve's permeability. Due to their small size and high fluidity, gas molecules can easily bypass the tiny gaps between the first baffles 41, achieving pressure balance inside and outside the equipment. Oil molecules, due to their larger size and relatively weaker fluidity, encounter greater resistance when passing through the first stop 41 at a 15° angle, thus being effectively blocked. Therefore, by controlling the inclination angle of the two first stops 41 to 15°, the vent valve of this invention further improves its oil-resistant performance while maintaining its air permeability.

[0048] Reference Figures 2 to 4In some embodiments of this utility model, the vent valve further includes a second oil-blocking component 50. The inner wall of the main body 10 has a platform 14, and the second oil-blocking component 50 is detachably mounted on the platform 14. The second oil-blocking component 50 is located between the first oil-blocking component 40 and the filter element. The second oil-blocking component 50 is introduced to further optimize the oil-proof performance of the vent valve. The second oil-blocking component 50 is installed on the inner wall of the main body 10, specifically on the platform 14, which is a specially designed installation platform for the second oil-blocking component 50, ensuring its stable and convenient installation. The second oil-blocking component 50, located between the first oil-blocking component 40 and the filter element, forms an additional oil-proof barrier. In practical applications, the detachable design of the second oil-blocking component 50 makes its maintenance and replacement very convenient. If the second oil baffle component 50 accumulates too much oil or impurities after the vent valve has been used for a long time, it can be easily removed from the shelf 14 for cleaning or replacement without disassembling the entire vent valve, thus greatly improving maintenance efficiency.

[0049] The second oil-blocking component 50 further enhances the oil-proof capability of the vent valve. It works in conjunction with the first oil-blocking component 40 to prevent oil from seeping into the equipment through the through-hole 11 of the vent valve. When oil attempts to pass through the vent valve, it first encounters the obstruction of the first oil-blocking component 40. If the oil continues to flow forward, bypassing the first oil-blocking component 40, it will encounter the second oil-blocking component 50 again. This dual oil-proof design greatly improves the dustproof, waterproof, and oil-proof performance of the vent valve. At the same time, the presence of the second oil-blocking component 50 does not affect the vent valve's permeability. Gas molecules can still easily pass through the gap between the filter element and the first oil-blocking component 40, as well as the tiny space between the second oil-blocking component 50 and the inner wall of the main body 10, achieving pressure balance inside and outside the equipment. Therefore, the addition of the second oil-blocking component 50 significantly improves the oil-proof performance while maintaining the original permeability of the vent valve.

[0050] Furthermore, referring to Figures 2 to 4 In some embodiments of this utility model, the second oil-blocking component 50 includes a mounting ring 51 and two second blocks 52. The mounting ring 51 is disposed on the platform 14, and the outer wall of the mounting ring 51 abuts against the inner wall of the main body 10. The two second blocks 52 are respectively disposed on the inner side of the mounting ring 51. The two second blocks 52 are disposed relatively at intervals in the through hole 11 along the axial direction of the through hole 11. The two second blocks 52 are arranged in parallel and are semi-circular.

[0051] Specifically, the second oil-blocking component 50 mainly includes a mounting ring 51 and two second baffles 52. The mounting ring 51 is set on the platform 14 of the main body 10, and its outer wall tightly abuts against the inner wall of the main body 10, ensuring the stability and sealing of the installation. The two second baffles 52 are respectively set on the inner side of the mounting ring 51. They are arranged relatively spaced along the axial direction of the through hole 11, and the two second baffles 52 are parallel to each other and are both semi-circular. This design allows the second oil-blocking component 50 to effectively prevent oil from splashing out of the equipment from the through hole 11 of the vent valve. In practical applications, when oil attempts to pass through the vent valve, it will first encounter the obstruction of the first oil-blocking component 40. If the oil bypasses the first oil-blocking component 40 and continues to flow forward, it will encounter the obstruction of the second oil-blocking component 50 again. The parallel arrangement and semi-circular structure between the two second baffles 52 form a tight oil barrier, greatly increasing the difficulty for oil to pass through. Furthermore, the tight fit between the second stop 52 and the mounting ring 51, as well as the abutting design between the mounting ring 51 and the inner wall of the main body 10, jointly ensure the stability and sealing of the second oil-blocking component 50. This structural design not only improves the oil-proof performance of the vent valve but also ensures that its venting performance is not affected. Gas molecules can still easily pass through the gap between the filter element and the second stop 52, achieving pressure balance inside and outside the equipment.

[0052] Reference Figures 1 to 5 In some embodiments of this utility model, a hexagonal flange 15 is provided on the outer periphery of the main body 10, and an installation thread 13 is provided on the part of the main body 10 away from the pipe cap 20 to the hexagonal flange 15. A sealing groove is provided on the side of the hexagonal flange 15 away from the pipe cap 20. The sealing groove is configured to accommodate a sealing ring 16. A protrusion 161 is provided on the outer side of the sealing ring 16. The protrusion 161 is configured to abut against the groove wall of the sealing groove.

[0053] To ensure the stability and sealing performance of the vent valve during connection and use, a hexagonal flange 15 structure is designed on the outer periphery of the body 10. This design not only facilitates the installation and disassembly of the vent valve but also enhances the fixing effect between the vent valve and the connecting components. The portion of the body 10 away from the cap 20 to the hexagonal flange 15 is provided with mounting threads 13, allowing the vent valve to be securely installed on equipment or pipelines via threaded connection, ensuring the stability and reliability of the connection. A sealing groove is provided on the side of the hexagonal flange 15 away from the cap 20. This sealing groove is specifically designed to accommodate the sealing ring 16 to further improve the sealing performance of the vent valve. The outer side of the sealing ring 16 has protrusions 161, which fit tightly against the groove wall of the sealing groove to form an effective sealing structure. When the vent valve is installed on equipment or pipelines, the sealing ring 16 is compressed, and the protrusions 161 tightly abut against the groove wall of the sealing groove, effectively preventing leakage of oil or other liquids and ensuring the cleanliness and dryness of the equipment's interior.

[0054] In some embodiments of this invention, the filter element includes at least one layer of filter media. The filter element is responsible for filtering rising high-temperature oil and gas, preventing condensation of the oil and gas on the surface of the breathable membrane and thus preventing blockage of the pores, thereby maintaining pressure balance inside and outside the equipment. The filter element contains at least one layer of filter media with a fine pore structure, which can effectively block impurities such as oil and dust, while allowing gas molecules to pass freely. In practical applications, the choice of filter media depends on the specific operating environment and filtration requirements. For example, in applications requiring high filtration accuracy, filter media with a finer pore structure can be selected; while in applications requiring greater air permeability, filter media with larger pores and better air permeability can be selected. Furthermore, to further improve the filtration effect, the filter element can also be designed as a multi-layer structure, with each layer of filter media having different filtration accuracy and material, to achieve multi-stage filtration and more efficient oil-proof performance.

[0055] During the assembly of the vent valve, the filter element is carefully placed inside the filter chamber 12 to ensure a tight fit with the first oil-blocking component 40 and the second oil-blocking component 50, forming a complete oil barrier. One end of the filter element abuts against the support rib 42, while the other end is fixed inside the filter chamber 12 by an appropriate fixing method to prevent it from shifting or falling off during operation.

[0056] Reference Figures 2 to 4 In some embodiments of this utility model, at least one vent groove 17 is provided on the periphery of one end of the mounting cap 20 of the main body 10, and the vent groove 17 communicates with the through hole 11. To further optimize the permeability of the vent valve and ensure that gas can be smoothly discharged from the inside of the equipment, at least one vent groove 17 is provided on the periphery of one end of the mounting cap 20 of the main body 10. These vent grooves 17 are directly connected to the through hole 11 of the vent valve, forming a highly efficient permeable channel. The design of the vent grooves 17 fully considers the characteristics of gas flow and the actual application requirements of the vent valve. Their position and number have been carefully calculated and optimized to ensure that the gas can be evenly distributed within the vent grooves 17 during discharge, reducing flow resistance and improving permeability efficiency. At the same time, the size and shape of the vent grooves 17 have also been carefully designed to ensure sufficient permeable area while avoiding the impact on the overall structural strength and sealing performance of the vent valve due to excessively large vent grooves 17.

[0057] Reference Figures 2 to 4In some embodiments of this invention, the membrane paper 60 is an E-PTFE membrane. E-PTFE membranes possess extremely high air permeability and excellent filtration performance. Their microporous structure allows gas molecules to pass through easily while effectively blocking impurities such as oil and dust, ensuring that the gas entering the equipment is pure and uncontaminated. This characteristic enables the vent valve to maintain efficient air permeability while also possessing excellent oil resistance. In practical applications, the E-PTFE membrane is cut and welded to the main body 10 of the vent valve, serving as a barrier for gas passage. Its fine pore structure and excellent air permeability ensure that gas can smoothly exit from the equipment while effectively preventing the intrusion of harmful substances such as liquids or particulate matter. Furthermore, the E-PTFE membrane also has good corrosion resistance and high-temperature resistance, maintaining stable performance in harsh working environments. This allows the vent valve to exhibit excellent reliability and durability in various industrial applications.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A breather valve characterized by, include: The main body has a through hole inside, the through hole including a filter cavity portion, the filter cavity portion being configured to accommodate a filter element; A pipe cap is configured to cover one end of the body, and the other end of the body is provided with mounting threads, which are configured to mount the body. A support frame, fixed within the main body, with a membrane paper disposed between the support frame and the tube cap, the membrane paper located at the end of the through hole near the tube cap, and connected to the main body by ultrasonic welding; and The first oil-blocking component is disposed in the through hole and located on the side away from the cap. The filter element is located between the first oil-blocking component and the support frame. The first oil-blocking component includes two first blocks. The two first blocks are disposed at a distance from each other in the through hole along the axial direction of the through hole. The two first blocks are gradually offset towards the axis of the through hole along the axial direction away from the cap. The two first blocks are arranged in a semi-circular shape.

2. A breather valve according to claim 1, wherein The first oil-blocking component further includes a support rib, which is disposed on the main body and located in the through hole. The support rib extends along the axial direction of the through hole, one end of the support rib is connected to the two first blocks respectively, and the other end of the support rib is configured to abut against one end of the filter element.

3. A breather valve according to claim 2, characterized in that, The gap between the adjacent ends of the two first stops is 0.8 to 0.9 mm.

4. A breather valve according to claim 2, characterized in that, The tilt angle of the two first stops is 15°.

5. A breather valve according to claim 1, characterized in that, It also includes a second oil-blocking component, the inner wall of the main body has a platform, the second oil-blocking component is detachably disposed on the platform, and the second oil-blocking component is located between the first oil-blocking component and the filter element.

6. A breather valve according to claim 5, characterized in that, The second oil baffle component includes: A mounting ring, wherein the mounting ring is disposed on the shelf, and the outer wall of the mounting ring abuts against the inner wall of the main body; and Two second stop blocks are respectively disposed on the inner side of the mounting ring. The two second stop blocks are disposed at intervals relative to each other in the through hole along the axial direction of the through hole. The two second stop blocks are arranged in parallel and are semi-circular.

7. A breather valve according to claim 1, characterized in that, A hexagonal flange is provided on the outer periphery of the main body. The portion of the main body from the end away from the pipe cap to the hexagonal flange is provided with the mounting thread. A sealing groove is provided on the side of the hexagonal flange away from the pipe cap. The sealing groove is configured to accommodate a sealing ring. A protrusion is provided on the outer side of the sealing ring. The protrusion is configured to abut against the groove wall of the sealing groove.

8. A vent valve according to claim 1, characterized in that, The filter element comprises at least one layer of filter media.

9. A breather valve according to claim 1, characterized in that, At least one vent groove is provided on the periphery of one end of the main body where the cap is installed, and the vent groove communicates with the through hole.

10. A breather valve according to claim 1, characterized in that, The membrane is an E-PTFE membrane.

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