Bidirectional vent valve for pressurization system of unmanned aerial vehicle

Abstract

The invention discloses a two-way vent valve for a pressurization system of an unmanned aerial vehicle, and belongs to the field of valves, the two-way vent valve comprises a valve body and a first connector and a second connector which are connected to the two ends of the valve body respectively, a valve element, a first spring assembly and a second spring assembly are arranged in the valve body, and a first groove and a second groove are formed in the two sides of the valve element respectively; the first connector is provided with a first flow channel, the second connector is provided with a second flow channel, the valve element is provided with a first penetrating hole and a second penetrating hole, one end of the first penetrating hole is communicated with the first flow channel, the other end of the first penetrating hole is communicated with the second groove, one end of the second penetrating hole is communicated with the second flow channel, and the other end of the second penetrating hole is communicated with the first groove. The first spring assembly comprises a first spring and a first abutting piece, the first abutting piece and the first groove are oppositely arranged, the second spring assembly comprises a second spring and a second abutting piece, the second abutting piece and the second groove are oppositely arranged, and therefore the valve body can be installed more conveniently.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and in particular relates to a two-way ventilation valve for a pressurization system of an unmanned aerial vehicle. Background Art

[0002] Usually, a boost system is provided in the fuel system of a drone, which is used to boost the pressure in the fuel tank of the drone. This ensures that the air and fuel in the fuel tank of the drone have a certain boost value relative to the outside atmosphere during the flight of the drone, thereby ensuring that the engine of the drone can work stably. A common drone boost system is provided with a compressor and a vent pipe. The compressor is connected to the fuel tank through the vent pipe, so that the pressurized gas generated by the compressor can flow into the fuel tank through the vent pipe to achieve boosting.

[0003] In order 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 ventilation pipe. When the pressure in the fuel tank is higher than the set threshold, the safety valve opens, and the gas in the fuel tank can be discharged through the safety valve to relieve the pressure; when the pressure in the fuel tank is lower than the set threshold, the anti-vacuum valve opens, and the outside atmosphere can enter the fuel tank through the anti-vacuum valve to prevent the formation of a vacuum state in the fuel tank. With this structure, the safety valve and the anti-vacuum valve can be used to balance the air pressure in the fuel tank. However, when the drone pressurization system is installed, the safety valve and the anti-vacuum valve need to be installed in sequence, which makes the safety valve and the anti-vacuum valve inconvenient to install, and thus makes the drone pressurization system inconvenient to install. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a two-way vent valve for a UAV pressurization 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 drone pressurization system, comprising 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 arranged in the valve body, the first spring assembly is arranged between the valve core and the first joint, and the second spring assembly is arranged 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, and the second pressing member is pressed against the end surface of the valve core under the action of the second spring 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 arranged 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 arranged 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 of the first connecting flow channel 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 arranged on the side wall of the second cylinder.

[0015] In one embodiment of the present invention, the second spring assembly further comprises 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;

[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, 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.

[0019] In one embodiment of the present invention, a positioning protrusion is provided on the inner wall of the valve body, an annular protrusion is provided on the valve core, the annular protrusion and the positioning protrusion are abutted for positioning, and the third sealing ring is sleeved on the annular protrusion.

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

[0021] In one embodiment of the present invention, the first connector and the valve body are threadedly connected, and a fourth sealing ring is further provided between the first connector and the valve body;

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

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] In the above scheme of the present application, the two-way vent valve includes a valve body and a first joint and a second joint respectively 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 vent pipe of the UAV boosting system, and the second joint can be connected to the outside atmosphere. When the air pressure in the fuel tank is higher than the set threshold, the gas in the fuel tank can be transmitted to the first joint through the vent pipe, and 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 abutment of the second spring assembly, so that the second spring is further compressed, and the second abutment and the valve core are separated from each other to form a gas flow channel. The gas flows through the gas flow channel to the second flow channel of the second joint, and then flows from the second flow channel to the outside atmosphere, thereby achieving 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, the gas in the outside 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 the first abutment of the first spring assembly, so that the first spring is further compressed, and the first abutment and the valve core are separated from each other to form a gas flow channel. The gas flows through the gas flow channel to the first flow channel of the first joint, and then flows from the first flow channel to the vent pipe, and flows through the vent pipe to the fuel tank, thereby replenishing gas in the fuel tank to avoid 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, and has a more compact structure and higher control accuracy. Moreover, when installing the drone boosting system, only one two-way vent valve needs to be installed, which makes the valve body installation more convenient, and thus makes the drone boosting system installation more convenient.

[0025] In addition, the use of an integrated two-way vent valve can avoid the safety valve and the anti-vacuum valve being two valves, which are prone to 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 oil tank.

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

[0027] Figure 1 is an exploded schematic diagram of a two-way vent valve provided in an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of a two-way vent valve provided by an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of a valve core in an embodiment of the present invention;

[0030] Figure 4 2 is a cross-sectional view of the valve core in an embodiment of the present invention.

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

[0032] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0033] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the present invention provides a two-way vent valve for a UAV boosting system, comprising a valve body 1 and a first joint 2 and a second joint 3 respectively connected to both ends of the valve body 1, a valve core 4, a first spring assembly 5 and a second spring assembly 6 are 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] The valve core 4 is provided with a first groove and a second groove on both sides, a first flow channel 21 is provided on the first joint 2, 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, 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 and the first groove are arranged opposite to each other. The first spring 51 is used to apply 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 joint 2 and the second joint 3 both include a bottom plate, a joint is provided on one side of the bottom plate, a cylindrical portion is provided on the other side of the bottom plate, an external thread is provided on the outer wall of the cylindrical portion, an internal thread is provided on the inner wall of the valve body 1, and the cylindrical portion and the valve body 1 are threadedly connected via the internal thread and the external thread. An accommodating cavity is provided inside the cylindrical portion, the first spring assembly 5 is provided in the accommodating cavity of the first joint 2, and the second spring assembly 6 is provided in the accommodating cavity of the second joint 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 two 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, a plurality of first through holes 41 and a plurality of second through holes 42 are provided, and the plurality of first through holes 41 and the plurality of second through holes 42 are staggered with each other. In this way, ventilation is performed through the plurality of 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. In this way, the gas in the first flow channel 21 can flow into the second groove through the first through hole 41. 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. In this way, the gas in the second flow channel can flow into the first groove through the second through hole 42.

[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 scheme of the present application, the two-way vent valve includes a valve body 1 and a first joint 2 and a second joint 3 respectively connected to both ends of the valve body 1, and a valve core 4, a first spring assembly 5 and a second spring assembly 6 are arranged in the valve body 1. With this structure, the first joint 2 can be connected to the vent pipe of the UAV boosting system, and the second joint 3 can be connected to the outside atmosphere. When the air pressure in the fuel tank is higher than the set threshold, the gas in the fuel tank can be transmitted to the first joint 2 through the vent pipe, and then flow through the first flow channel 21 in the first joint 2 to the first perforation 41 on the valve core 4, and flow through the first perforation 41 to the second groove. At this time, the gas in the second groove can impact on the second abutment of the second spring assembly 6, so that the second spring 61 is further compressed, and the second abutment and the valve core 4 are separated from each other to form a gas flow channel, and the gas flows through the gas flow channel to the second flow channel 31 of the second joint 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 in a safe state. When the air pressure in the fuel tank is lower than the set threshold, the gas in the outside 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 through the vent pipe to the fuel tank, so as to replenish gas in the fuel tank and avoid 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, and the structure is more compact and the control accuracy is higher. Moreover, when the UAV boosting system is installed, only one two-way vent valve needs to be installed, so that the valve body is installed more conveniently, and the UAV boosting system is installed more conveniently.

[0045] In addition, the use of an integrated two-way vent valve can avoid the safety valve and the anti-vacuum valve being two valves, which are prone to 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 oil tank.

[0046] Furthermore, after the gas in the second flow channel 31 flows into the first groove through the second through hole 42, the gas applies pressure to the first pressing member 52, so that the first pressing member 52 squeezes the first spring 51 to move, thereby separating the first pressing member 52 from the first groove, so that the gas in the first groove can enter the space outside the valve core 4 and flow into the oil tank through the first flow channel 21. At this time, the gas outside the valve core 4 may flow into the second groove through the first through hole 41, but since the gas can apply force to the second pressing member 62 during the process of flowing from the second flow channel 31 to the second through hole 42, the pressure of the gas in the second groove squeezing the second pressing member 62 is small, which is not enough to drive the second spring 61 to contract to separate the second pressing member 62 from the second groove. Vice versa. 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 ventilation valve, and further improving the stability of the two-way ventilation valve.

[0047] In some embodiments of the present application, the first pressing 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, and at the same time improving the stability and positioning accuracy of the first spring assembly 5. When the 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, so that the first base applies 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 and the external space of the valve core 4 are connected, and 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, a first spring 51 is arranged between the first spring seat 53 and the first pressing member 52, and the first spring seat 53 presses against the inner surface of the first joint 2; a first connecting flow channel is arranged in the first spring seat 53, one end of the first connecting flow channel is connected to the first flow channel 21 of the first joint 2, and the other end is connected to the outside of the first spring seat 53. With this structure, the two ends of the first spring 51 are fixed by the first spring seat 53 and the first pressing member 52 respectively, so that the spring installation and positioning are more convenient. When one end of the first connecting flow channel is connected to the first flow channel 21 of the first joint 2, and the other end is connected to the outside of the first spring seat 53, when the gas in the first groove flows to the outside of the valve body 1 through the flow channel between the first abutment member and the first groove, it can flow to the first flow channel 21 of the first joint 2 through the first connecting flow channel, and then flow to the oil tank.

[0050] In some embodiments of the present application, the first spring seat 53 is a cylindrical seat body, which includes a first section and a second section, and the outer diameter of the first section is smaller than the outer diameter of the second section, so that a step structure is formed between the first section and the second section, and one end of the first spring 51 passes through the first section and abuts against the end surface of the second end, that is, abuts against the step structure. In this way, the installation and positioning of the first spring 51 can be 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 joint 2, and the protrusion is arranged in the positioning groove for positioning. The protrusion may be an annular protrusion, and the positioning groove may be an annular groove.

[0052] In some embodiments of the present application, a through hole is provided on the cylindrical seat body, and the through hole and the internal cavity of the cylindrical seat body together constitute a first connecting flow channel. In addition, both ends of the cylindrical seat body are open, so that the gas outside the first spring seat 53 can also flow into the inside of the cylindrical seat body through the opening at one end of the cylindrical seat body close to the first spring 51; or the gas inside the cylindrical seat body can also flow out through the opening at one end of the cylindrical seat body close to the first spring 51. In this way, the efficiency of gas flow can be improved. Among them, a plurality of through holes are provided on the cylindrical seat body, and the plurality of through holes 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 against 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 against 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, and at the same time 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, and the gas in the second groove can pass through the second through hole to 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, a second spring 61 is arranged between the second spring seat 63 and the second pressing member 62, and the second spring seat 63 presses against the inner surface of the second joint 3; a second connecting flow channel is arranged in the second spring seat 63, one end of the second connecting flow channel is connected to the second flow channel 31 of the second joint 3, and the other end is connected to the outside of the second spring seat 63. With this structure, the two ends of the second spring 61 are fixed by the second spring seat 63 and the second pressing member 62 respectively, so that the spring installation and positioning are more convenient. When one end of the second connecting flow channel is connected to the second flow channel 31 of the second joint 3, and the other end is connected to the outside of the second spring seat 63, when the gas in the second groove flows to the outside of the valve body 1 through the flow channel between the second abutment member and the second groove, it can 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, which includes a first section and a second section, the outer diameter of the first section is smaller than the outer diameter of the second section, so that a step structure is formed between the first section and the second section, and one end of the second spring 61 passes through the first section and abuts against the end surface of the second end, that is, abuts against the step structure. In this way, the installation and positioning of the second spring 61 can be 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 arranged in the positioning groove for positioning. The protrusion may be an annular protrusion, and the positioning groove may be an annular groove.

[0058] In some embodiments of the present application, a through hole is provided on 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 the gas outside the second spring seat 63 can also flow into the inside of the cylindrical seat body through the opening at one end of the cylindrical seat body close to the second spring 61; or the gas inside the cylindrical seat body can also flow out through the opening at one end of the cylindrical seat body close to the second spring 61. In this way, the efficiency of gas flow can be improved. Among them, a plurality of through holes are provided on the cylindrical seat body, and the plurality of 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 is used to seal the first base and the end surface of the valve core 4, which can improve the sealing performance between the first base and the valve core 4; the second sealing ring is used to seal the second base and the end surface of the valve core 4, which can improve 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, and the third sealing ring 7 is pressed between the inner wall of the valve body 1 and the outer surface of the valve core 4, and the first through hole 41 opens toward the outside of the valve core 4 and the second through hole 42 opens toward the outside of the valve core 4, and is respectively located on both sides of the third sealing ring 7. With this structure, the inner wall of the valve body 1 and the outer surface of the valve core 4 are sealed by the third sealing ring 7, so that gas can be prevented 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 makes it more convenient to install the valve core 4.

[0063] In some embodiments of the present application, the two-way vent valve further includes a bushing 10, which is disposed 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, by filling the bushing 10 between the first joint 2 and the annular protrusion, the valve core 4 can be clamped between the bushing 10 and the positioning protrusion, thereby improving the stability of the valve core 4 installation.

[0064] In some embodiments of the present application, Figure 1 and Figure 2 As shown, the first joint 2 and the valve body 1 are threadedly connected, and a fourth sealing ring 8 is also provided between the first joint 2 and the valve body 1; the second joint 3 and the valve body 1 are threadedly connected, and a fifth sealing ring 9 is also provided between the second joint 3 and the valve body 1. With this structure, the fourth sealing ring 8 is used to seal the first joint 2 and the valve body 1, which can improve the external sealing of the two-way vent valve and prevent the gas in the valve body 1 from passing through the gap between the first joint 2 and the valve body 1 and flowing out to the outside atmosphere; the fifth sealing ring 9 is used to seal the second joint 3 and the valve body 1, which can further improve the external sealing of the two-way vent valve and prevent the gas in the valve body 1 from passing through the gap between the second joint 3 and the valve body 1 and flowing out to the outside atmosphere.

[0065] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

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

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A two-way vent valve for a UAV pressurization system, characterized in that: It comprises a valve body and a first joint and a second joint respectively connected to two ends of the valve body, wherein a valve core, a first spring assembly and a second spring assembly are arranged in the valve body, the first spring assembly is arranged between the valve core and the first joint, and the second spring assembly is arranged between the valve core and the second joint; The valve core is provided with a first groove and a second groove on both sides, 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; 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; 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 pressurization 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 pressurization 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 an 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 pressurization system according to claim 2 is 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 pressurization 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 of the second connecting flow channel 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 a UAV pressurization system according to claim 7, characterized in that: A positioning protrusion is provided on the inner wall of the valve body, an annular protrusion is provided on the valve core, the annular protrusion and the positioning protrusion are abutted for positioning, and the third sealing ring is sleeved on the annular protrusion.

9. The two-way vent valve for a UAV pressurization 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 pressurization 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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