A breather valve

Abstract

This application discloses a vent valve, relating to the field of vent valves, comprising a base and a vent valve cover for gas flow fixed at the top of the base. A mounting seat for fixed communication with the equipment's exhaust port is fixedly fixed at the middle of the bottom end of the base. A sealing ring is fixedly sleeved on the outer side of the bottom end of the base, and an annular sealing block is fixedly fixed at the middle of the top end of the base. A rubber pad, a PP sheet, and a vent membrane are sequentially installed inside the annular sealing block. This application uses a conical column and a perforated column to initially fix the vent valve cover and the base, allowing the fixing protrusion to engage with the fixing groove. The sealing ring and the annular groove are then fused together by ultrasonic welding to form a seal, achieving a secondary seal between the equipment and the device, preventing gas leakage or impurity intrusion. The gas channel formed by the rubber pad and the PP sheet allows gas inside the equipment to pass through the exhaust port, through-hole, and micropores on the surface of the rubber pad and the PP sheet, and then be filtered by the vent membrane before being discharged from the exhaust port, balancing internal and external pressure and preventing water and dust from entering the equipment.

Description

Technical Field

[0001] This application relates to the field of vent valves, and more particularly to a vent valve. Background Technology

[0002] A vent valve is a device used to balance the air pressure inside and outside a container and prevent abnormal internal pressure. It allows gas to pass freely to achieve ventilation, and also has functions such as dustproof and waterproof. It is convenient to effectively protect the items or equipment inside the container and is widely used in many fields such as electronics, automobiles, and food packaging.

[0003] Traditional vent valves are generally composed of a base, a valve cover, and a single vent layer. During use, they are prone to sealing failure. The single sealing structure is prone to cracking due to aging, which can lead to gas leakage or impurity intrusion. Utility Model Content

[0004] In order to improve the problems of sealing failure and gas short circuit that are common in traditional vent valves, this application provides a vent valve.

[0005] The vent valve provided in this application adopts the following technical solution:

[0006] A vent valve includes a base and a vent valve cover for gas flow fixed at the top of the base. A mounting seat for fixed communication with the exhaust port of the equipment is fixed at the middle of the bottom end of the base. A sealing ring is fixedly sleeved on the outer side of the bottom end of the base. An annular sealing block is fixed at the middle of the top end of the base. A rubber pad, a PP sheet and a vent membrane are sequentially installed inside the annular sealing block.

[0007] By adopting the above technical solution, in this vent valve, the base serves as the main structure. It is fixedly connected to the equipment exhaust port through the mounting seat at the middle of the bottom of the base, realizing the connection of the gas transmission channel. The sealing ring on the outer side of the bottom of the base is used to prevent gas leakage at the connection between the equipment and the vent valve, ensuring the sealing performance of the device. The annular sealing block at the middle of the top of the base provides the mounting base for the internal components. The rubber gaskets installed sequentially inside the annular sealing block enhance the sealing effect with their own elasticity. The PP sheet plays a role in supporting and protecting the vent membrane. The vent membrane allows gas to pass through through its own microporous structure, while blocking dust, moisture and other impurities from entering the equipment, thus realizing the function of the vent valve in balancing the internal and external air pressure of the equipment and preventing dust and water.

[0008] Preferably, a plurality of conical columns are fixedly provided on the outer circumference of the top of the base, and a plurality of perforated columns and sealing rings are fixedly provided on the inner top surface of the vent valve cover, with the conical columns inserted into the perforated columns.

[0009] By adopting the above technical solution, the conical column and the perforated column cooperate with each other to achieve precise positioning and initial fixation of the base and the vent valve cover. The sealing ring on the inner top surface of the vent valve cover facilitates a tight fit with the corresponding structure on the base after assembly, forming a stable seal.

[0010] Preferably, the top end of the annular sealing block is provided with an annular groove that matches the sealing ring, and the sealing ring engages with the annular groove to form a contact seal.

[0011] By adopting the above technical solution, the sealing ring and the annular groove engage to form a contact sealing structure, which is used to prevent gas from leaking from the connection between the annular sealing block and the vent valve cover, thereby enhancing the sealing performance inside the vent valve and ensuring that gas can only be discharged through components such as the vent membrane along a preset path.

[0012] Preferably, a fixing groove is provided on the outer ring of the top of the base, and a fixing protrusion is provided on the outer ring of the inner top surface of the vent valve cover. The fixing groove and the fixing protrusion are adapted to each other and engage.

[0013] By adopting the above technical solution, the cooperation between the fixing groove and the fixing protrusion facilitates axial positioning when the vent valve cover and the base are assembled, preventing the vent valve cover from shifting during installation, ensuring that the conical column and the hole column can be accurately connected, and further enhancing the stability of the connection between the vent valve cover and the base.

[0014] Preferably, the top of the base has a plurality of annular array exhaust holes.

[0015] By adopting the above technical solution, the exhaust port is used to provide an exhaust channel for the gas inside the equipment after it has been filtered by components such as the breathable membrane, so that the gas is discharged in a dispersed and stable manner, avoiding pressure unevenness caused by local airflow concentration, and helping to maintain a stable balance of air pressure inside and outside the equipment.

[0016] Preferably, the rubber pad has a through hole in the middle, and the mounting base has an air outlet in the middle with the same diameter as the through hole.

[0017] By adopting the above technical solution, the through hole and the vent hole cooperate to form a channel for the gas to be discharged from the inside of the equipment, ensuring that the gas can smoothly enter the vent valve. The rubber pad, through the elastic sealing properties of the rubber material, fits tightly with the surrounding components to prevent gas leakage during transmission.

[0018] Preferably, the breathable membrane has the same diameter as the PP sheet and the rubber pad, and is installed inside the annular sealing block and the sealing ring.

[0019] By adopting the above technical solution, the breathable membrane, PP sheet and rubber pad have the same diameter and are installed together inside the annular sealing block and sealing ring, ensuring that there is no gap between the components and effectively preventing gas from bypassing the filter layer and leaking.

[0020] Preferably, the breathable membrane is a nano-level PTFE composite membrane, and the PP sheet is made of modified polypropylene.

[0021] By adopting the above technical solution, the breathable membrane allows the gas inside the equipment to pass through smoothly through its nano-scale microporous structure. At the same time, due to the small pore size of the breathable membrane, it effectively blocks dust, moisture and other tiny impurities, achieving efficient dust and water protection. The PP sheet is made of modified polypropylene material, which firmly supports the breathable membrane, prevents it from deforming and being damaged, and facilitates the initial interception of larger dust particles or droplets.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By inserting a conical column into the hole column, the vent valve cover and the base are initially positioned. The fixing protrusion is then engaged in the fixing groove to complete the axial positioning. The arc-shaped protrusion of the sealing ring and the annular groove of the annular sealing block are ultrasonically welded together to form a seal. This, together with the sealing ring at the bottom of the base, achieves a secondary seal between the equipment and the device, solving the problem of gas leakage or impurity intrusion caused by the aging and cracking of the traditional single sealing structure of the vent valve. Through the gas channel composed of the rubber pad and PP sheet, the gas inside the equipment passes through the outlet hole and through the through hole, through the micropores on the surface of the rubber pad and PP sheet, and is filtered through the vent membrane before being discharged from the exhaust hole. This avoids gas short-circuiting caused by the lack of layered filtration design in the vent valve. While balancing the internal and external pressure, it effectively prevents water and dust from entering the equipment. Attached Figure Description

[0024] Figure 1 This is a frontal axonometric view of the present application;

[0025] Figure 2 This is a bottom-view axial view of the present application;

[0026] Figure 3 This is a front view of this application;

[0027] Figure 4 This is a partial sectional view of this application;

[0028] Figure 5 This is an exploded view of this application;

[0029] Figure 6 This is an exploded view from below in this application.

[0030] Reference numerals: 1. Base; 2. Vent valve cover; 3. Sealing ring; 4. Rubber pad; 5. PP sheet; 6. Vent membrane; 7. Annular sealing block; 8. Conical column; 9. Hole column; 10. Mounting base; 11. Vent hole; 12. Through hole; 13. Exhaust hole; 14. Annular groove; 15. Sealing ring; 16. Fixing groove; 17. Fixing protrusion. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 - Figure 6 This application will be described in further detail.

[0032] This application discloses a breather valve.

[0033] Reference Figure 1 - Figure 6 A vent valve includes a base 1 and a vent valve cover 2 for gas flow fixed to the top of the base 1. The shape of the base 1 is as follows (e.g., Figure 5 As shown), an annular sealing block 7 is fixedly provided at the top center of the base 1. The annular sealing block 7 is an annular block, and an annular groove 14 is opened at the top of the annular sealing block 7. A mounting seat 10 is fixedly provided at the bottom center of the base 1. The shape of the mounting seat 10 is as shown in the figure. Figure 6 As shown), it is used to snap into the exhaust port of the equipment and be fixedly connected to the exhaust port. The axis of the mounting base 10 coincides with that of the base 1 and the annular sealing block 7. An exhaust hole 11 is opened in the middle of the mounting base 10. The exhaust hole 11 is connected to the middle of the base 1 and the annular sealing block 7. The inner diameter of the base 1 is the same as the inner diameter of the exhaust hole 11. The diameter of the exhaust hole 11 is smaller than the inner diameter of the annular sealing block 7. It is used to connect with the equipment and transport the gas in the equipment. The bottom end of the base 1 is fixedly fitted with a sealing ring 3 on the outside of the mounting base 10. The sealing ring 3 is made of high temperature resistant fluororubber material. It can maintain good elasticity in long-term use and avoid aging or deformation due to temperature changes or environmental factors. It is used to seal between the equipment and the device.

[0034] Multiple conical columns 8 are fixedly mounted on the outer circumference of the top of the base 1. A fixing groove 16 is opened on the outer circumference of the top of the base 1. Multiple perforated columns 9 are fixed at the bottom of the vent valve cover 2 at the conical columns 8. The number of conical columns 8 and perforated columns 9 is the same. The bottom of the perforated columns 9 is opened with an insertion hole, and the conical columns 8 are inserted into the perforated columns 9 through the insertion hole; the shape of the vent valve cover 2 (e.g., ...) Figure 5 As shown), a fixing protrusion 17 is fixedly provided on the outer ring of the inner top surface of the vent valve cover 2. The fixing groove 16 is adapted to the shape of the fixing protrusion 17, and the fixing groove 16 engages with the fixing protrusion 17. A sealing ring 15 is fixedly provided in the middle of the inner top surface of the vent valve cover 2. The sealing ring (15) is made of fluororubber material, which is suitable for high pressure environment and can maintain effective sealing within the working pressure range. The protruding part in the middle of the bottom end of the sealing ring 15 is an arc-shaped protrusion structure, which forms a contact seal with the annular groove 14 at the top of the annular sealing block 7. The middle of the bottom end of the sealing ring 15 is engaged in the annular groove 14. The inner diameter of the sealing ring 15 is the same as the inner diameter of the annular sealing block 7. (e.g.) Figure 4 As shown in the figure, it is used to seal between the base 1 and the vent valve cover 2.

[0035] Several vent holes 13 are opened at the top center of the base 1. A rubber pad 4 is fixed at the top center of the annular sealing block 7. The rubber pad 4 is made of food-grade silicone rubber, which has corrosion resistance and low temperature resistance. The diameter of the rubber pad 4 is the same as the inner diameter of the annular sealing block 7. The rubber pad 4 is installed inside the annular sealing block 7. The bottom end of the rubber pad 4 is fixed to the top center of the base 1. A through hole 12 is opened in the center of the rubber pad 4. The diameter of the through hole 12 is the same as that of the vent hole 11. The through hole 12 communicates with the vent hole 11 for gas transmission. A PP sheet 5 is fixed at the top of the rubber pad 4. The rubber pad 4 and the PP sheet 5 are bonded and fixed by high-strength silicone, and mechanical pressing technology is used to further ensure the firmness. The PP sheet 5 is made of modified polypropylene. The surface of the PP sheet 5 is provided with micropores that allow gas to pass through.

[0036] A breathable membrane 6 is fixed to the top of the PP sheet 5. The breathable membrane 6 is fixed to the PP sheet 5 by a hot-pressing process to prevent loosening due to airflow, vibration, or high temperature. The breathable membrane 6 is made of nano-level PTFE composite membrane, with a waterproof rating of IP68 and an air permeability of ≥500L / m. 2 / s@70mbar, the service life of the breathable membrane 6 should be more than 5000 hours. It can maintain excellent breathability even in high or low temperature environments. The diameter of the breathable membrane 6, PP sheet 5 and annular sealing block 7 are the same. PP sheet 5 provides support for breathable membrane 6 to prevent it from deforming or breaking due to pressure or vibration. At the same time, it intercepts larger dust or droplets and plays a preliminary filtering role. The breathable membrane 6, PP sheet 5 and rubber pad 4 are installed inside the annular sealing block 7 and sealing ring 15. Gas passes through PP sheet 5 and breathable membrane 6 through air outlet 11 and through hole 12 and is discharged from exhaust hole 13.

[0037] Before using the vent valve, the bottom end of the base 1 should be fitted with a sealing ring 3 on the outside of the mounting base 10, so that the mounting base 10 can be inserted into the equipment exhaust port (such as automotive electric drive systems, outdoor LED lights or new energy battery packs, etc., which require ventilation, dustproof and waterproof equipment) and fixedly connected to the equipment exhaust port. The annular sealing block 7 and the sealing ring 15 are assembled with rubber pad 4, PP sheet 5 and vent membrane 6 in sequence. The vent valve cover 2 is fixed to the base 1 by the insertion of the conical column 8 and the hole column 9. At the same time, the fixing protrusion 17 is engaged with the fixing groove 16, and the bottom circular protrusion of the sealing ring 15 is engaged with the annular groove 14. The seal is formed by ultrasonic welding, ensuring that the gas passes through the vent hole 11, the through hole 12, the PP sheet 5 and the vent membrane 6 and is discharged from the exhaust hole 13.

[0038] In use, the conical column 8 is inserted into the insertion hole of the column 9 to initially position and fix the vent valve cover 2 and the base 1. The fixing protrusion 17 is then engaged in the fixing groove 16 to complete the axial positioning. Subsequently, the circular protrusion of the sealing ring 15 and the annular groove 14 of the annular sealing block 7 are ultrasonically welded together to form a seal. The rubber pad 4 and the PP sheet 5 are tightly attached to form a gas channel, which in turn drives the gas inside the equipment through the vent 11 to the through hole 12, through the silicone rubber pad 4, the PP sheet 5 and the breathable membrane 6, and finally out from the exhaust hole 13, achieving multiple protective functions of internal and external air pressure balance and dust and water protection.

[0039] The implementation principle of a vent valve in this application embodiment is as follows: the gas inside the equipment enters through the vent 11 of the mounting base 10, passes through the through hole 12 and the rubber pad 4, and is filtered through the PP sheet 5 and the vent membrane 6 in sequence, and finally discharged from the exhaust hole 13. During use, the sealing ring 3 at the bottom of the base 1 achieves secondary sealing between the equipment and the device. The conical column 8 is inserted into the hole column 9 for initial positioning and fixing of the vent valve cover 2 and the base 1. The fixing protrusion 17 is inserted into the fixing groove 16 to complete axial positioning. The sealing ring 15 protrudes and presses the annular groove 14 of the annular sealing block 7, and forms a contact seal by ultrasonic welding, which together achieves air pressure balance and dust and water protection.

[0040] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vent valve, characterized in that: The device includes a base (1) and a vent valve cover (2) for gas flow fixed at the top of the base (1). The bottom center of the base (1) is fixed with a mounting seat (10) that is fixedly connected to the exhaust port of the equipment. A sealing ring (3) is fixedly sleeved on the outer side of the bottom of the base (1). An annular sealing block (7) is fixed at the top center of the base (1). A rubber pad (4), a PP sheet (5) and a breathable membrane (6) are installed in sequence inside the annular sealing block (7).

2. The vent valve according to claim 1, characterized in that: Multiple conical columns (8) are fixedly provided on the outer circumference of the top of the base (1), and multiple perforated columns (9) and sealing rings (15) are fixedly provided on the inner top surface of the vent valve cover (2), with the conical columns (8) inserted into the perforated columns (9).

3. The vent valve according to claim 1, characterized in that: The top of the annular sealing block (7) is provided with an annular groove (14) that is adapted to the sealing ring (15). The sealing ring (15) and the annular groove (14) are fused together by ultrasonic welding to form a seal.

4. A breather valve according to claim 1, characterized in that: The base (1) has a fixing groove (16) on the outer ring of the top edge, and the vent valve cover (2) has a fixing protrusion (17) on the outer ring of the inner top surface. The fixing groove (16) and the fixing protrusion (17) are adapted to each other and engage.

5. A vent valve according to claim 1, characterized in that: The base (1) has several annular array exhaust holes (13) at its top.

6. A vent valve according to claim 1, characterized in that: The rubber pad (4) has a through hole (12) in the middle, and the mounting base (10) has an air outlet (11) with the same diameter as the through hole (12) in the middle.

7. A vent valve according to claim 1, characterized in that: The breathable membrane (6) has the same diameter as the PP sheet (5) and the rubber pad (4), and is installed inside the annular sealing block (7) and the sealing ring (15).

8. A vent valve according to claim 1, characterized in that: The breathable membrane (6) is made of nano-level PTFE composite membrane, and the PP sheet (5) is made of modified polypropylene material.

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