A two-way breather valve for a drone supercharging system

Abstract

The application discloses a bidirectional vent valve for a pressurization system of an unmanned aerial vehicle, and belongs to the valve field, which comprises a valve body, a first joint and a second joint connected to two ends of the valve body respectively, a valve core, a first spring assembly and a second spring assembly arranged in the valve body, a first groove and a second groove arranged on two sides of the valve core, a first flow channel arranged on the first joint, a second flow channel arranged on the second joint, a first perforation and a second perforation arranged on the valve core, one end of the first perforation being communicated with the first flow channel, the other end of the first perforation being communicated with the second groove, one end of the second perforation being communicated with the second flow channel, the other end of the second perforation being communicated with the first groove, the first spring assembly comprising a first spring and a first pressure receiving piece, the first pressure receiving piece being oppositely arranged with the first groove, the second spring assembly comprising a second spring and a second pressure receiving piece, the second pressure receiving piece being oppositely arranged with the second groove, so that the valve body can be more convenient to install.

Description

Technical Field

[0001] The present invention belongs to the field of valve technology, and in particular relates to a two-way vent valve for a UAV boosting system. Background Art

[0002] Typically, drone fuel systems include a boost system that pressurizes the fuel tank. This ensures that the air and fuel in the tank maintain a certain level of pressure relative to the outside atmosphere during flight, thereby ensuring stable engine operation. A typical drone boost system consists of a compressor and a snorkel connected to the fuel tank via the snorkel, allowing the pressurized gas generated by the compressor to flow into the fuel tank through the snorkel, achieving boosted pressure.

[0003] To improve the stability of the air pressure in the fuel tank, a safety valve and an anti-vacuum valve are usually installed on the vent pipe. When the pressure in the fuel tank exceeds the set threshold, the safety valve opens, allowing the gas in the tank to be discharged through the safety valve to relieve the pressure. When the pressure in the fuel tank falls below the set threshold, the anti-vacuum valve opens, allowing the outside air to enter the fuel tank through the anti-vacuum valve to prevent a vacuum from forming in the tank. With this structure, the safety valve and anti-vacuum valve can be used to balance the air pressure in the fuel tank. However, when installing the drone's booster system, the safety valve and anti-vacuum valve need to be installed sequentially, making them inconvenient to install, and thus the drone's booster system. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, the present invention provides a two-way vent valve for a UAV booster system. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0005] In a first aspect, the present invention provides a two-way vent valve for a UAV boosting system, comprising a valve body and a first joint and a second joint respectively connected to both ends of the valve body. A valve core, a first spring assembly, and a second spring assembly are provided within the valve body. The first spring assembly is disposed between the valve core and the first joint, and the second spring assembly is disposed between the valve core and the second joint.

[0006] A first groove and a second groove are respectively provided on both sides of the valve core, a first flow channel is provided on the first joint, a second flow channel is provided on the second joint, a first through-hole and a second through-hole are provided on the valve core, one end of the first through-hole is connected to the first flow channel, the other end of the first through-hole is connected to the second groove, one end of the second through-hole is connected to the second flow channel, and the other end of the second through-hole is connected to the first groove;

[0007] The first spring assembly includes a first spring and a first pressing member, the first pressing member and the first groove are arranged opposite to each other, the first spring is used to apply an elastic force to the first pressing member, and the first pressing member is pressed against the end surface of the valve core under the action of the first spring to seal the first groove;

[0008] The second spring assembly includes a second spring and a second pressing member. The second pressing member and the second groove are arranged opposite to each other. The second spring is used to apply an elastic force to the second pressing member. Under the action of the second spring, the second pressing member is pressed against the end surface of the valve core to seal the second groove.

[0009] In one embodiment of the present invention, the first pressing member includes a first base and a first cylinder, one end of the first cylinder is connected to the first base, and the other end is connected to the first groove;

[0010] The first base is in contact with the end surface of the valve core, and a first through hole is provided on the side wall of the first cylinder.

[0011] In one embodiment of the present invention, the first spring assembly further comprises a first spring seat, the first spring is disposed between the first spring seat and the first pressing member, and the first spring seat presses against the inner surface of the first joint;

[0012] A first connecting flow channel is provided in the first spring seat. One end of the first connecting flow channel is communicated with the first flow channel of the first joint, and the other end is communicated with the outside of the first spring seat.

[0013] In one embodiment of the present invention, the second pressing member includes a second base and a second cylinder, one end of the second cylinder is connected to the second base, and the other end is connected to the second groove;

[0014] The second base is in contact with the end surface of the valve core, and a second through hole is provided on the side wall of the second cylinder.

[0015] In one embodiment of the present invention, the second spring assembly further includes a second spring seat, the second spring is disposed between the second spring seat and the second pressing member, and the second spring seat presses against the inner surface of the second joint;

[0016] A second connecting flow channel is provided in the second spring seat. One end of the second connecting flow channel is communicated with the second flow channel of the second joint, and the other end of the second connecting flow channel is communicated with the outside of the second spring seat.

[0017] In one embodiment of the present invention, a first sealing ring is provided between the first base and the end surface of the valve core, and a second sealing ring is provided between the second base and the end surface of the valve core.

[0018] In one embodiment of the present invention, a third sealing ring is sleeved on the valve core, and the third sealing ring is pressed between the inner wall of the valve body and the outer surface of the valve core, and the opening of the first perforation toward the outside of the valve core and the opening of the second perforation toward the outside of the valve core are respectively located on both sides of the third sealing ring.

[0019] In one embodiment of the present application, the inner wall of the valve body is provided with a positioning protrusion, the valve core is provided with an annular protrusion part, and the annular protrusion part and the positioning protrusion are in abutment positioning, and the third sealing ring is sleeved on the annular protrusion part.

[0020] In one embodiment of the present application, a bushing is further arranged between the first joint and the annular protrusion part, and the bushing and the positioning protrusion are located on both sides of the annular protrusion part.

[0021] In one embodiment of the present application, the first joint and the valve body are threadedly connected, and the fourth sealing ring is further arranged between the first joint and the valve body.

[0022] The second joint and the valve body are threadedly connected, and the fifth sealing ring is further arranged between the second joint and the valve body.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] In the above-mentioned scheme of the present application, the bidirectional breather valve includes a valve body and first and second joints connected to both ends of the valve body, and a valve core, a first spring assembly and a second spring assembly are arranged in the valve body. With this structure, the first joint can be connected to the breather pipe of the unmanned aerial vehicle pressurization system, and the second joint can be connected to the external atmosphere. When the air pressure in the fuel tank is higher than the set threshold value, the gas in the fuel tank can be transmitted to the first joint through the breather pipe, then flow through the first flow channel in the first joint to the first perforation on the valve core, and flow through the first perforation to the second groove. At this time, the gas in the second groove can impact on the second abutting piece of the second spring assembly, so that the second spring is further compressed, and the second abutting piece and the valve core are separated from each other to form a gas flow channel, through which the gas flows into the second flow channel of the second joint, and then flows from the second flow channel to the external atmosphere, thereby realizing pressure relief and ensuring that the air pressure in the fuel tank is in a safe state. When the air pressure in the fuel tank is lower than the set threshold value, the gas in the external atmosphere can flow through the second flow channel in the second joint to the second perforation on the valve core, and flow through the second perforation to the first groove. At this time, the gas in the first groove can impact on the first abutting piece of the first spring assembly, so that the first spring is further compressed, and the first abutting piece and the valve core are separated from each other to form a gas flow channel, through which the gas flows into the first flow channel of the first joint, and then flows from the first flow channel to the breather pipe, and then flows to the fuel tank through the breather pipe, thereby supplementing the gas in the fuel tank and avoiding the formation of a vacuum state in the fuel tank. Therefore, the bidirectional breather valve in the present application has the functions of a safety valve and a vacuum prevention valve, has a more compact structure and higher control precision, and when the unmanned aerial vehicle pressurization system is installed, only one bidirectional breather valve needs to be installed, thereby making the valve body installation more convenient and the unmanned aerial vehicle pressurization system installation more convenient.

[0025] In addition, the two-way breather valve with the integrated structure can avoid mutual influence between the safety valve and the anti-vacuum valve when the two valves are close to each other, and can improve the pressure balance effect of the safety valve and the anti-vacuum valve on the oil tank.

[0026] The application will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is an exploded view of the two-way breather valve provided by the embodiment of the application;

[0028] Figure 2 is a sectional view of the two-way breather valve provided by the embodiment of the application;

[0029] Figure 3 is a schematic view of the valve core in the embodiment of the application;

[0030] Figure 4 is a sectional view of the valve core in the embodiment of the application.

[0031] Reference signs: 1-valve body, 2-first joint, 21-first flow channel, 3-second joint, 31-second flow channel, 4-valve core, 41-first perforation, 42-second perforation, 5-first spring assembly, 51-first spring, 52-first pressing piece, 53-first spring seat, 6-second spring assembly, 61-second spring, 62-second pressing piece, 63-second spring seat, 7-third sealing ring, 8-fourth sealing ring, 9-fifth sealing ring, 10-bushing. DETAILED DESCRIPTION

[0032] The application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the embodiment of the application provides a two-way breather valve for a pressurization system of an unmanned aerial vehicle, which comprises a valve body 1, a first joint 2 and a second joint 3 connected to two ends of the valve body 1 respectively, a valve core 4, a first spring assembly 5 and a second spring assembly 6 arranged in the valve body 1, the first spring assembly 5 is arranged between the valve core 4 and the first joint 2, and the second spring assembly 6 is arranged between the valve core 4 and the second joint 3.

[0034] A first groove and a second groove are respectively provided on both sides of the valve core 4. A first flow channel 21 is provided on the first joint 2, and a second flow channel 31 is provided on the second joint 3. A first through-hole 41 and a second through-hole 42 are provided on the valve core 4. One end of the first through-hole 41 is connected to the first flow channel 21, and the other end of the first through-hole 41 is connected to the second groove. One end of the second through-hole 42 is connected to the second flow channel 31, and the other end of the second through-hole 42 is connected to the first groove.

[0035] The first spring assembly 5 includes a first spring 51 and a first pressing member 52. The first pressing member 52 is disposed opposite the first groove. The first spring 51 is used to apply an elastic force to the first pressing member 52. Under the action of the first spring 51, the first pressing member 52 presses against the end surface of the valve core 4 to seal the first groove.

[0036] The second spring assembly 6 includes a second spring 61 and a second pressing member 62. The second pressing member 62 is arranged opposite to the second groove. The second spring 61 is used to apply an elastic force to the second pressing member 62. Under the action of the second spring 61, the second pressing member 62 is pressed against the end surface of the valve core 4 to seal the second groove.

[0037] In some embodiments of the present application, the valve body 1 is a cylinder, the valve core 4 is disposed in the cylinder, and is located in the middle position of the cylinder along the axial direction of the cylinder.

[0038] In some embodiments of the present application, the first connector 2 and the second connector 3 each include a base plate, a connector disposed on one side of the base plate, and a cylindrical portion disposed on the other side of the base plate. The outer wall of the cylindrical portion is provided with an external thread, and the inner wall of the valve body 1 is provided with an internal thread. The cylindrical portion and the valve body 1 are threadedly connected via the internal and external threads. The cylindrical portion has an interior containing a chamber, and the first spring assembly 5 is disposed within the chamber of the first connector 2, while the second spring assembly 6 is disposed within the chamber of the second connector 3.

[0039] In some embodiments of this application, please refer to Figure 3 and Figure 4 The valve core 4 is a cylindrical structure, and a first groove and a second groove are respectively provided at both ends of the valve core 4. The opening of the first groove faces the first joint 2, and the opening of the second groove faces the second joint 3.

[0040] In some embodiments of the present application, the first through-hole 41 and the second through-hole 42 are staggered to avoid the first through-hole 41 and the second through-hole 42 being connected to each other and affecting the flow direction of the gas.

[0041] In some embodiments of the present application, there are multiple first through-holes 41 and multiple second through-holes 42, and the multiple first through-holes 41 and the multiple second through-holes 42 are staggered with each other. In this way, ventilation is performed through the multiple first through-holes 41 and the second through-holes 42, which can improve ventilation efficiency.

[0042] In some embodiments of the present application, one end of the first through-hole 41 is connected to the first flow channel 21, and the other end of the first through-hole 41 is connected to the second groove. Thus, gas in the first flow channel 21 can flow through the first through-hole 41 into the second groove. One end of the second through-hole 42 is connected to the second flow channel 31, and the other end of the second through-hole 42 is connected to the first groove. Thus, gas in the second flow channel can flow through the second through-hole 42 into the first groove.

[0043] In some embodiments of the present application, along the opening direction of the first groove, the projection of the first groove is located within the projection of the first pressing member 52 ; the opening area of ​​the first groove is smaller than the cross-sectional area of ​​the first pressing member 52 .

[0044] In the above-mentioned embodiment of the present application, the two-way vent valve includes a valve body 1 and a first connector 2 and a second connector 3 respectively connected to the two ends of the valve body 1. The valve body 1 is provided with a valve core 4, a first spring assembly 5, and a second spring assembly 6. With this structure, the first connector 2 can be connected to the vent pipe of the drone's boost system, and the second connector 3 can be connected to the outside atmosphere. When the air pressure in the fuel tank exceeds a set threshold, the gas in the fuel tank can be transmitted to the first connector 2 through the vent pipe, then flow through the first flow channel 21 in the first connector 2 to the first through-hole 41 on the valve core 4, and then through the first through-hole 41 to the second groove. At this time, the gas in the second groove can impact the second abutment of the second spring assembly 6, causing the second spring 61 to further compress and separate the second abutment and the valve core 4 to form a gas flow channel. The gas flows through this gas flow channel to the second flow channel 31 of the second connector 3, and then flows from the second flow channel 31 to the outside atmosphere, thereby achieving pressure relief and ensuring that the air pressure in the fuel tank is at a safe state. When the air pressure in the fuel tank is lower than the set threshold, the gas in the external atmosphere can flow through the second flow channel 31 in the second joint 3 to the second perforation 42 on the valve core 4, and flow through the second perforation 42 to the first groove. At this time, the gas in the first groove can impact the first abutment of the first spring assembly 5, so that the first spring 51 is further compressed, and the first abutment and the valve core 4 are separated from each other to form a gas flow channel. The gas flows through the gas flow channel to the first flow channel 21 of the first joint 2, and then flows from the first flow channel 21 to the vent pipe, and flows into the fuel tank through the vent pipe, thereby replenishing gas in the fuel tank and avoiding the formation of a vacuum state in the fuel tank. Therefore, the two-way vent valve in the present application is compatible with the functions of the safety valve and the anti-vacuum valve, has a more compact structure, and higher control accuracy. Moreover, when installing the UAV boosting system, only one two-way vent valve needs to be installed, which makes the valve body installation more convenient, and thus makes the installation of the UAV boosting system more convenient.

[0045] In addition, the use of an integrated two-way vent valve can avoid the situation where the safety valve and the anti-vacuum valve are two valves and easily affect each other when the two are close to each other, resulting in poor effect of the safety valve and the anti-vacuum valve on the air pressure balance in the fuel tank.

[0046] Furthermore, after the gas from the second flow channel 31 flows through the second perforation 42 into the first groove, it applies pressure to the first pressure member 52, causing it to squeeze the first spring 51 and move, thereby separating the first pressure member 52 from the first groove. This allows the gas in the first groove to enter the space outside the valve core 4 and flow into the fuel tank through the first flow channel 21. At this time, the gas outside the valve core 4 may flow through the first perforation 41 into the second groove. However, since the gas exerts a force on the second pressure member 62 during its flow from the second flow channel 31 to the second perforation 42, the pressure exerted by the gas in the second groove on the second pressure member 62 is relatively small and insufficient to drive the second spring 61 to contract and separate the second pressure member 62 from the second groove. The reverse is also true. Therefore, the structure of the first through-hole 41, the first spring assembly 5 and the first groove, and the structure of the second through-hole 42, the second spring assembly 6 and the second groove in the present application can cooperate with each other to achieve self-locking, avoiding the mutual influence between the valve body 1 as a safety valve structure and the structure as an anti-vacuum valve, thereby improving the air pressure balance effect of the two-way vent valve, and further improving the stability of the two-way vent valve.

[0047] In some embodiments of the present application, the first pressure member 52 includes a first base and a first cylinder, one end of the first cylinder is connected to the first base, and the other end is connected to the first groove; the first base is in contact with the end face of the valve core 4, and a first through hole is provided on the side wall of the first cylinder. With this structure, the first cylinder can be inserted into the first groove for positioning, making the installation and positioning of the first spring assembly 5 more convenient, while improving the stability and positioning accuracy of the first spring assembly 5. When gas passes through the second perforation 42 and enters the first groove, the gas in the first groove can enter the first cylinder and apply pressure to the first base, causing the first base to apply pressure to the first spring 51. At this time, the first spring 51 contracts, and the first base and the first cylinder move toward the first joint 2, so that the first through hole is connected to the external space of the valve core 4. The gas in the first groove can flow through the first through hole to the outside of the valve core 4 and then flow into the first flow channel 21.

[0048] In some embodiments of the present application, a plurality of first through holes are provided, and the plurality of first through holes are evenly distributed on the outer circumference of the first cylinder.

[0049] In some embodiments of the present application, the first spring assembly 5 further includes a first spring seat 53. The first spring 51 is disposed between the first spring seat 53 and the first pressing member 52. The first spring seat 53 presses against the inner surface of the first joint 2. A first connecting channel is provided within the first spring seat 53. One end of the first connecting channel communicates with the first channel 21 of the first joint 2, and the other end communicates with the exterior of the first spring seat 53. With this structure, the two ends of the first spring 51 are respectively secured by the first spring seat 53 and the first pressing member 52, making spring installation and positioning more convenient. When one end of the first connecting channel communicates with the first channel 21 of the first joint 2 and the other end communicates with the exterior of the first spring seat 53, the gas in the first groove flows to the exterior of the valve body 1 through the channel between the first pressing member and the first groove. The gas can then flow through the first connecting channel to the first channel 21 of the first joint 2, and then into the oil tank.

[0050] In some embodiments of the present application, the first spring seat 53 is a cylindrical seat body comprising a first section and a second section. The outer diameter of the first section is smaller than that of the second section, forming a step structure between the first and second sections. One end of the first spring 51 passes through the first section and abuts against the end surface of the second end, i.e., abuts against the step structure. This makes installation and positioning of the first spring 51 more convenient.

[0051] In some embodiments of the present application, a protrusion extends outward from one end of the cylindrical seat away from the first spring 51, and a positioning groove is provided on the first connector 2, and the protrusion is positioned in the positioning groove. The protrusion can be an annular protrusion, and the positioning groove can be an annular groove.

[0052] In some embodiments of the present application, the cylindrical seat body is provided with a through hole, which together with the internal cavity of the cylindrical seat body constitutes a first connecting flow channel. Furthermore, both ends of the cylindrical seat body are open, allowing gas outside the first spring seat 53 to flow into the cylindrical seat body through the opening at the end of the cylindrical seat body near the first spring 51; alternatively, gas inside the cylindrical seat body can flow out through the opening at the end of the cylindrical seat body near the first spring 51. This improves the efficiency of gas flow. The cylindrical seat body is provided with multiple through holes, which are evenly distributed along the circumference of the cylindrical seat body.

[0053] In some embodiments of the present application, the second pressure member 62 includes a second base and a second cylinder, one end of the second cylinder is connected to the second base, and the other end is connected to the second groove; the second base abuts the end face of the valve core 4, and a second through hole is provided on the side wall of the second cylinder. The first pressure member 52 includes a first base and a first cylinder, one end of the first cylinder is connected to the first base, and the other end is connected to the first groove; the first base abuts the end face of the valve core 4, and a first through hole is provided on the side wall of the first cylinder. With this structure, the second cylinder can be extended into the second groove for positioning, making the installation and positioning of the second spring assembly 6 more convenient, while also improving the stability and positioning accuracy of the second spring assembly 6. When the gas passes through the first through-hole 41 and enters the second groove, the gas in the second groove can enter the second cylinder and exert pressure on the second base, so that the second base exerts pressure on the second spring 61. At this time, the second spring 61 contracts, and the second base and the second cylinder move toward the second joint 3, so that the second through-hole and the external space of the valve core 4 are connected. The gas in the second groove can pass through the second through-hole and flow to the outside of the valve core 4, and then flow into the second flow channel 31.

[0054] In some embodiments of the present application, a plurality of second through holes are provided, and the plurality of second through holes are evenly distributed on the outer circumference of the second cylinder.

[0055] In some embodiments of the present application, the second spring assembly 6 further includes a second spring seat 63. The second spring 61 is disposed between the second spring seat 63 and the second pressing member 62. The second spring seat 63 presses against the inner surface of the second joint 3. A second connecting flow channel is provided within the second spring seat 63. One end of the second connecting flow channel communicates with the second flow channel 31 of the second joint 3, and the other end communicates with the exterior of the second spring seat 63. With this structure, the two ends of the second spring 61 are respectively fixed by the second spring seat 63 and the second pressing member 62, making spring installation and positioning more convenient. When one end of the second connecting flow channel communicates with the second flow channel 31 of the second joint 3 and the other end communicates with the exterior of the second spring seat 63, the gas in the second groove flows to the exterior of the valve body 1 through the flow channel between the second pressing member and the second groove. It can then flow through the second connecting flow channel to the second flow channel 31 of the second joint 3, and then flow into the oil tank.

[0056] In some embodiments of the present application, the second spring seat 63 is a cylindrical seat body comprising a first section and a second section. The outer diameter of the first section is smaller than that of the second section, forming a step structure between the first and second sections. One end of the second spring 61 passes through the first section and abuts against the end surface of the second end, i.e., abuts against the step structure. This makes installation and positioning of the second spring 61 more convenient.

[0057] In some embodiments of the present application, a protrusion extends outward from one end of the cylindrical seat away from the second spring 61, and a positioning groove is provided on the second joint 3, and the protrusion is positioned in the positioning groove. The protrusion can be an annular protrusion, and the positioning groove can be an annular groove.

[0058] In some embodiments of the present application, a through hole is provided in the cylindrical seat body, and the through hole and the internal cavity of the cylindrical seat body together constitute the second connecting flow channel. In addition, both ends of the cylindrical seat body are open, so that gas outside the second spring seat 63 can flow into the interior of the cylindrical seat body through the opening at the end of the cylindrical seat body near the second spring 61; alternatively, gas inside the cylindrical seat body can also flow out through the opening at the end of the cylindrical seat body near the second spring 61. This can improve the efficiency of gas flow. Specifically, the cylindrical seat body is provided with multiple through holes, and the multiple through holes are evenly distributed along the circumference of the cylindrical seat body.

[0059] In some embodiments of the present application, a first sealing ring is provided between the first base and the end surface of the valve core 4, and a second sealing ring is provided between the second base and the end surface of the valve core 4. With this structure, the first sealing ring seals the first base and the end surface of the valve core 4, thereby improving the sealing performance between the first base and the valve core 4; and the second sealing ring seals the second base and the end surface of the valve core 4, thereby improving the sealing performance between the second base and the valve core 4.

[0060] In some embodiments of the present application, a third sealing ring 7 is sleeved on the valve core 4. The third sealing ring 7 is compressed between the inner wall of the valve body 1 and the outer surface of the valve core 4. The first through-hole 41 and the second through-hole 42, which are opened toward the outside of the valve core 4, are located on either side of the third sealing ring 7. With this structure, the third sealing ring 7 seals the inner wall of the valve body 1 and the outer surface of the valve core 4, thereby preventing gas from flowing out from between the inner wall of the valve body 1 and the outer surface of the valve core 4.

[0061] In some embodiments of the present application, Figure 3 and Figure 4 As shown, a positioning groove for positioning the third sealing ring 7 is provided on the valve core 4.

[0062] In some embodiments of the present application, a positioning protrusion is provided on the inner wall of the valve body 1, and an annular protrusion is provided on the valve core 4. The annular protrusion and the positioning protrusion are abutted for positioning, and the third sealing ring 7 is sleeved on the annular protrusion. With this structure, the valve core 4 is positioned by the positioning protrusion, which can make the valve core 4 more convenient to install.

[0063] In some embodiments of the present application, the bidirectional breather valve further comprises a bushing 10 arranged between the first joint 2 and the annular protrusion, and the bushing 10 and the positioning protrusion are located on both sides of the annular protrusion. With this structure, the valve core 4 can be clamped between the bushing 10 and the positioning protrusion by filling the bushing 10 between the first joint 2 and the annular protrusion, thereby improving the stability of the installation of the valve core 4.

[0064] In some embodiments of the present application, as shown in Figure 1 and Figure 2 , the first joint 2 is threadedly connected with the valve body 1, and the fourth sealing ring 8 is further arranged between the first joint 2 and the valve body 1; the second joint 3 is threadedly connected with the valve body 1, and the fifth sealing ring 9 is further arranged between the second joint 3 and the valve body 1. With this structure, the fourth sealing ring 8 seals between the first joint 2 and the valve body 1, which can improve the external sealing performance of the bidirectional breather valve, so as to prevent the gas in the valve body 1 from flowing out to the outside atmosphere through the gap between the first joint 2 and the valve body 1; the fifth sealing ring 9 seals between the second joint 3 and the valve body 1, which can further improve the external sealing performance of the bidirectional breather valve, so as to prevent the gas in the valve body 1 from flowing out to the outside atmosphere through the gap between the second joint 3 and the valve body 1.

[0065] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0066] In addition, the terms "first", "second", "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0067] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] The above description is further detailed in connection with specific preferred embodiments of the present application, and it is not to be construed that the specific implementation of the present application is limited to these descriptions. For those skilled in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, and all of them should be considered as falling within the protection scope of the present application.

Claims

1. A two-way vent valve for a UAV booster system, characterized in that: The valve body comprises a valve body and a first joint and a second joint respectively connected to both ends of the valve body, wherein a valve core, a first spring assembly and a second spring assembly are provided in the valve body, the first spring assembly is provided between the valve core and the first joint, and the second spring assembly is provided between the valve core and the second joint; A first groove and a second groove are respectively provided on both sides of the valve core, a first flow channel is provided on the first joint, a second flow channel is provided on the second joint, and a first through-hole and a second through-hole are provided on the valve core, one end of the first through-hole is connected to the first flow channel, and the other end of the first through-hole is connected to the second groove, one end of the second through-hole is connected to the second flow channel, and the other end of the second through-hole is connected to the first groove; The first spring assembly includes a first spring and a first pressing member. The first pressing member and the first groove are arranged opposite to each other. The first spring is used to apply an elastic force to the first pressing member. Under the action of the first spring, the first pressing member presses against the end surface of the valve core to seal the first groove. The second spring assembly includes a second spring and a second pressing member. The second pressing member and the second groove are arranged opposite to each other. The second spring is used to apply an elastic force to the second pressing member. Under the action of the second spring, the second pressing member is pressed against the end surface of the valve core to seal the second groove.

2. The two-way vent valve for the UAV boosting system according to claim 1 is characterized in that: The first pressing member includes a first base and a first cylinder, one end of the first cylinder is connected to the first base, and the other end is connected to the first groove; The first base is in contact with the end surface of the valve core, and a first through hole is provided on the side wall of the first cylinder.

3. The two-way vent valve for the UAV boosting system according to claim 2 is characterized in that: The first spring assembly further includes a first spring seat, the first spring is disposed between the first spring seat and the first pressing member, and the first spring seat presses against the inner surface of the first joint; A first connecting flow channel is provided in the first spring seat. One end of the first connecting flow channel is communicated with the first flow channel of the first joint, and the other end of the first connecting flow channel is communicated with the outside of the first spring seat.

4. The two-way vent valve for the UAV boosting system according to claim 2, characterized in that: The second pressing member includes a second base and a second cylinder, one end of the second cylinder is connected to the second base, and the other end is connected to the second groove; The second base is in contact with the end surface of the valve core, and a second through hole is provided on the side wall of the second cylinder.

5. The two-way vent valve for the UAV boosting system according to claim 4 is characterized in that: The second spring assembly further includes a second spring seat, the second spring is arranged between the second spring seat and the second pressing member, and the second spring seat presses against the inner surface of the second joint; A second connecting flow channel is provided in the second spring seat. One end of the second connecting flow channel is communicated with the second flow channel of the second joint, and the other end is communicated with the outside of the second spring seat.

6. The two-way vent valve for a UAV pressurization system according to claim 4, characterized in that: A first sealing ring is provided between the first base and the end surface of the valve core, and a second sealing ring is provided between the second base and the end surface of the valve core.

7. The two-way vent valve for a UAV pressurization system according to claim 1, characterized in that: A third sealing ring is sleeved on the valve core, and the third sealing ring is pressed between the inner wall of the valve body and the outer surface of the valve core, and the opening of the first through-hole toward the outside of the valve core and the opening of the second through-hole toward the outside of the valve core are respectively located on both sides of the third sealing ring.

8. The two-way vent valve for the UAV boosting system according to claim 7, characterized in that: A positioning protrusion is provided on the inner wall of the valve body, and an annular protrusion is provided on the valve core. The annular protrusion and the positioning protrusion are in contact with each other for positioning, and the third sealing ring is sleeved on the annular protrusion.

9. The two-way vent valve for the UAV boosting system according to claim 8, characterized in that: It also includes a bushing, which is arranged between the first joint and the annular protrusion, and the bushing and the positioning protrusion are located on both sides of the annular protrusion.

10. The two-way vent valve for a UAV boosting system according to claim 1, characterized in that: The first joint and the valve body are threadedly connected, and a fourth sealing ring is provided between the first joint and the valve body; The second joint is threadedly connected to the valve body, and a fifth sealing ring is provided between the second joint and the valve body.

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