Exhaust valve, fuel tank system and vehicle
By integrating the two valve cores into one valve body, adjusting the valve core position to achieve air pressure balance and liquid partition, the problems of complex structure and oil leakage of existing exhaust valves are solved, and the effect of simplifying the structure and reducing costs is achieved.
Patent Information
- Application Number
- CN202411097736.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2044-08-12
AI Technical Summary
The existing exhaust valves have complex structures, resulting in high costs and increased difficulty in laying them in the fuel tank, and it is difficult to effectively avoid oil leakage.
The two valve cores are integrated into one valve body, and the air pressure balance and liquid partition between the inlet and exhaust ports are achieved by adjusting the valve core position, simplifying the structure and reducing costs.
The structure of the exhaust valve is simplified, the manufacturing cost is reduced, the volume is reduced, the arrangement is convenient in the oil tank, and the leakage of oil is effectively avoided.
Smart Images
Figure CN118623050B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of fuel tanks, and in particular to an exhaust valve, a fuel tank system and a vehicle. Background Art
[0002] In the prior art, in order to ensure the pressure balance between the inside and outside of the oil tank, an exhaust valve connecting the inside and outside of the oil tank is provided on the oil tank to control the flow of gas between the inside and outside of the oil tank and maintain the pressure balance between the inside and outside of the oil tank. The exhaust valve needs to reduce or avoid the leakage of oil in the oil tank through the exhaust valve while maintaining the pressure balance of the inside of the oil tank, which makes the overall structure of the exhaust valve complex, increases the cost of the exhaust valve and increases the difficulty of arranging the exhaust valve in the oil tank. Summary of the invention
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an exhaust valve, wherein two valve cores can be integrated into one valve body, thereby simplifying the exhaust valve structure.
[0004] The present invention also provides an oil tank system having the exhaust valve.
[0005] The present invention also provides a vehicle.
[0006] According to an embodiment of the present invention, the exhaust valve includes: a valve body, wherein a first chamber and a second chamber that are interconnected are provided in the valve body, the first chamber having an exhaust port that is connected to the outside of an oil tank, and the second chamber having an air inlet that is connected to the inside of the oil tank; a first valve core, wherein the first valve core is disposed in the first chamber, the first valve core having a first conducting position that connects the exhaust port and the second chamber, and a first sealing position that separates the exhaust port and the second chamber; and a second valve core, wherein the second valve core is disposed in the second chamber, the second valve core having a second conducting position that connects the air inlet and the first chamber, and a second sealing position that separates the air inlet and the first chamber.
[0007] According to the exhaust valve of the embodiment of the present invention, the air inlet and the exhaust port can be connected to balance the air pressure difference between the air inlet and the exhaust port by adjusting the position of the first valve core and the second valve core, and the position of the first valve core or the second valve core can be adjusted to block the flow of liquid from the air inlet to the exhaust port to cause leakage. Therefore, by integrating the first valve core and the second valve core into one valve body, the structure of the exhaust valve can be simplified, the manufacturing cost of the exhaust valve can be reduced, and the volume of the exhaust valve can be reduced, which is convenient for the arrangement of the exhaust valve in the oil tank.
[0008] In some embodiments, the exhaust port is located above the air inlet, and the first chamber is located above the second chamber.
[0009] In some embodiments, the first valve core is movably disposed in the first chamber along a first direction to switch between the first conducting position and the first sealing position.
[0010] Further, the first chamber includes a ventilation channel and a first valve chamber, the ventilation channel is connected to the second chamber, the first valve chamber is connected to the exhaust port, the first valve core is located in the first valve chamber, and the first valve chamber and the ventilation channel are arranged along a first direction.
[0011] Furthermore, a vertical partition is provided between the ventilation channel and the first valve chamber, an intermediate air port is provided on the vertical partition, the first valve core is located at the first sealing position when cooperating with the intermediate air port, and is located at the first conducting position when the first valve core is away from the intermediate air port.
[0012] Furthermore, the ventilation channel includes a connected lower channel and an upper channel, in the second direction, the upper channel is located above the lower channel, the lower end of the lower channel is connected to the second chamber, and the horizontal side of the upper channel is the vertical partition provided with the intermediate air port.
[0013] Further, the lower channel extends along the first direction, the upper channel extends along the second direction, and a portion of the projection of the lower channel along the second direction coincides with the projection of the upper channel along the second direction.
[0014] In some embodiments, the valve body further includes: a connecting cavity having an upper opening connected to the first chamber and a lower opening connected to the second chamber, and in the second direction, the connecting cavity is located between the first chamber and the second chamber.
[0015] Further, when the second valve core is located at the second sealing position, the second valve core closes the lower opening.
[0016] Further, in the second direction, the second valve core is suitable for moving under the action of an external force to close the lower opening.
[0017] In some embodiments, a guide post is further disposed in the second chamber, the guide post extends along the second direction, and the second valve core is slidably connected to the guide post.
[0018] Furthermore, the exhaust valve further includes: a first elastic member, wherein the first elastic member is connected to the valve body and the second valve core to provide an upward thrust to the second valve core.
[0019] Furthermore, the first elastic member is sleeved on the guide column, and a cavity is provided on the second valve core, and the cavity cooperates with the guide column to fix the second valve core.
[0020] In some embodiments, when the second valve core is located at the second sealing position, the second valve core is connected to the guide post.
[0021] In some embodiments, the valve body further includes: a tilting port, the tilting port being connected to the connecting cavity, and the tilting port being suitable for connecting to an anti-tilt valve.
[0022] In some embodiments, the lower port includes a main port and a secondary port that are spaced apart, and the second valve core includes a main valve core and a sub-valve core; wherein, when the second valve core is located at the second sealing position, the main valve core closes the main port, and the sub-valve core closes the secondary port.
[0023] Furthermore, when the second valve core is located at the second conducting position, the main valve core is away from the main port, and the sub-valve core is away from the sub-port.
[0024] Furthermore, the second valve core also has an intermediate position between the second conduction position and the second sealing position. When the second valve core is located at the intermediate position, the main valve core closes the main port and the sub-valve core is away from the secondary port; the second valve core moves sequentially between the second conduction position, the intermediate position and the second sealing position.
[0025] Further, the main valve core is arranged in the second chamber, and the main valve core has a receiving groove and a vent hole, the receiving groove is open upward, and the vent hole passes through the main valve core and is connected to the receiving groove; the sub-valve core is movably arranged in the receiving groove, and the sub-valve core has a first position and a second position in the receiving groove, and the first position is higher than the second position; when the second valve core is located at the second sealing position, the sub-valve core separates the secondary port from the receiving groove at the first position, and when the second valve core is located at the middle position, the sub-valve core is located at the second position to make the secondary port connect the receiving groove and the connecting chamber.
[0026] Furthermore, the vent hole is higher than the air inlet.
[0027] In some embodiments, the second valve core further includes: a second elastic member, wherein the second elastic member connects the main valve core and the sub-valve core to provide an upward thrust to the sub-valve core.
[0028] In some embodiments, a leakage hole is provided at the bottom of the valve body, and the leakage hole connects the second chamber with the interior of the oil tank.
[0029] In some embodiments, when there is no liquid in the exhaust valve and the exhaust valve is placed horizontally and the exhaust port is located above the air inlet, the second valve core is configured to be in the second conducting position, and the air inlet is connected to the first chamber.
[0030] According to an embodiment of the present invention, the fuel tank system includes: a fuel tank; an exhaust pipe, one end of which is connected to the outside of the fuel tank; and the exhaust valve described in the above embodiment, the air inlet of the exhaust valve is connected to the inside of the fuel tank, and the exhaust port is connected to the exhaust pipe.
[0031] According to the fuel tank system of the embodiment of the present invention, by adopting the exhaust valve of the above embodiment, the exhaust valve can make the air inlet and the exhaust port connected by adjusting the position of the first valve core and the second valve core to balance the air pressure difference at both ends of the air inlet and the exhaust port, and can also block the flow of liquid from the air inlet to the exhaust port to cause leakage by adjusting the position of the first valve core or the second valve core. Therefore, by integrating the first valve core and the second valve core into one valve body, the structure of the exhaust valve can be simplified, the manufacturing cost of the exhaust valve can be reduced, and the volume of the exhaust valve can be reduced, which is convenient for the arrangement of the exhaust valve in the fuel tank.
[0032] In some embodiments, the valve body further includes: a connected roll port and a connecting cavity, wherein the connecting cavity connects the first chamber and the second chamber; the oil tank system further includes: an anti-roll valve, wherein the anti-roll valve is disposed on the oil tank, and the anti-roll valve is connected to the roll port.
[0033] The vehicle according to the embodiment of the present invention includes the fuel tank described in the above embodiment, or includes the exhaust valve described in the above embodiment.
[0034] According to the vehicle of the embodiment of the present invention, by adopting the fuel tank of the above embodiment or the exhaust valve of the above embodiment, the exhaust valve can make the air inlet and the exhaust port connected by adjusting the position of the first valve core and the second valve core to balance the air pressure difference at both ends of the air inlet and the exhaust port, and can also block the flow of liquid from the air inlet to the exhaust port to cause leakage by adjusting the position of the first valve core or the second valve core. Therefore, by integrating the first valve core and the second valve core into one valve body, the structure of the exhaust valve can be simplified, the manufacturing cost of the exhaust valve can be reduced, and the volume of the exhaust valve can be reduced, which is convenient for the arrangement of the exhaust valve in the fuel tank or the vehicle.
[0035] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0037] Figure 1 is a schematic diagram of the three-dimensional structure of an exhaust valve according to an embodiment of the present invention;
[0038] Figure 2 It is a structural schematic diagram of a second valve core of an exhaust valve according to an embodiment of the present invention being located at a second conducting position;
[0039] Figure 3 for Figure 2 A schematic structural diagram of the exhaust valve in the illustrated embodiment, in which the second valve core is located at the second sealing position;
[0040] Figure 4 is a structural schematic diagram of a second valve core of an exhaust valve located at a second conducting position according to another embodiment of the present invention;
[0041] Figure 5 for Figure 4 A schematic structural diagram of the exhaust valve in the embodiment shown, in which the second valve core is located in the middle position;
[0042] Figure 6 for Figure 4 A schematic structural diagram of the exhaust valve in the illustrated embodiment, in which the second valve core is located at the second sealing position;
[0043] Figure 7 is a bottom view of an exhaust valve according to an embodiment of the present invention;
[0044] Figure 8 Schematic diagram of the structure of a fuel tank system according to an embodiment of the present invention.
[0045] Reference numerals:
[0046] Fuel tank system 1000
[0047] Exhaust valve 100,
[0048] Valve body 10,
[0049] The first chamber 11, the ventilation channel 111, the upper channel 1111, the lower channel 1112, the first valve chamber 112, the vertical partition 113,
[0050] Second chamber 12, exhaust port 13, air inlet 14, communication chamber 15, upper port 16, lower port 17, main port 171, auxiliary port 172, tilt port 18, liquid leakage hole 19
[0051] The first valve core 20,
[0052] The second valve core 30, the main valve core 31, the sub-valve core 32, the receiving groove 33, the vent hole 34, the second elastic member 35, the sealing protrusion 36,
[0053] The first elastic member 40, the guide column 50,
[0054] Fuel tank 200 , exhaust pipe 300 , anti-roll valve 400 , carbon canister 500 . DETAILED DESCRIPTION
[0055] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0058] The exhaust valve 100 , the fuel tank system 1000 , and the vehicle according to embodiments of the present invention will be described below with reference to the accompanying drawings.
[0059] like Figure 1-Figure 3 As shown, the exhaust valve 100 according to the embodiment of the present invention includes: a valve body 10 , a first valve core 20 and a second valve core 30 .
[0060] The valve body 10 is provided with a first chamber 11 and a second chamber 12 which are connected to each other. The first chamber 11 has an exhaust port 13 connected to the outside of the oil tank 200, and the second chamber 12 has an air inlet 14 connected to the inside of the oil tank 200. The first valve core 20 is provided in the first chamber 11. The first valve core 20 has a first conducting position connecting the exhaust port 13 and the second chamber 12, and a first sealing position separating the exhaust port 13 and the second chamber 12. The second valve core 30 is provided in the second chamber 12. The second valve core 30 has a second conducting position connecting the air inlet 14 and the first chamber 11, and a second sealing position separating the air inlet 14 and the first chamber 11.
[0061] It can be understood that when the first valve core 20 and the second valve core 30 are both in the second conducting position, the air inlet 14 and the exhaust port 13 are connected through the first chamber 11 and the second chamber 12, so as to balance the air pressure difference between the exhaust valve 100 at the air inlet 14 and the exhaust port 13. When the first valve core 20 is in the first sealing position, or the second valve core 30 is in the second sealing position, the connection between the air inlet 14 and the exhaust port 13 can be cut off, so as to reduce or prevent the liquid at the air inlet 14 from flowing to the exhaust port 13 and then leaking from the exhaust valve 100. Furthermore, if the first valve core 20 is in the first sealing position and the second valve core 30 is in the second sealing position, two layers of partition can be formed between the air inlet 14 and the exhaust port 13, so as to further reduce or prevent the liquid at the air inlet 14 from flowing to the exhaust port 13 and then leaking from the exhaust valve 100.
[0062] Therefore, the exhaust valve 100 can connect the air inlet 14 and the exhaust port 13 by adjusting the position of the first valve core 20 and the second valve core 30 to balance the air pressure difference between the air inlet 14 and the exhaust port 13, and can also block the flow of liquid from the air inlet 14 to the exhaust port 13 to cause leakage by adjusting the position of the first valve core 20 or the second valve core 30.
[0063] The exhaust valve 100 of the present application can simplify the structure of the exhaust valve 100, reduce the manufacturing cost of the exhaust valve 100, and reduce the volume of the exhaust valve 100, thereby facilitating the arrangement of the exhaust valve 100 in the oil tank 200, by integrating the first valve core 20 and the second valve core 30 on a valve body 10.
[0064] In some embodiments, Figure 1-Figure 3 As shown, the exhaust port 13 is located above the air inlet 14 , and the first chamber 11 is located above the second chamber 12 .
[0065] It is understandable that the air inlet 14 and the air outlet 13 are connected to different spaces. The liquid flows downward under the action of gravity.
[0066] Therefore, the exhaust port 13 is located above the air inlet 14, which can reduce or prevent the liquid from flowing from the air inlet 14 to the exhaust port 13, so that when the first valve core 20 is in the first conduction position and the second valve core 30 is in the second conduction position, it can reduce or prevent the liquid from flowing upward from the air inlet 14 to the exhaust port 13, that is, reduce or prevent the liquid at the air inlet 14 from flowing out of the exhaust port 13.
[0067] The first chamber 11 is located above the second chamber 12 , so that the liquid in the first chamber 11 can flow to the second chamber 12 under the action of gravity, thereby reducing or avoiding residual liquid in the first chamber 11 , that is, reducing or avoiding the liquid in the first chamber 11 from flowing out of the exhaust port 13 .
[0068] Preferably, when liquid enters the second chamber 12 from the air inlet 14, the second valve core 30 is moved to the second sealing position by the buoyancy of the liquid, thereby reducing or preventing the liquid in the second chamber 12 from entering the first chamber 11, so that the second valve core 30 can automatically isolate the air inlet 14 and the first chamber 11.
[0069] In some embodiments, Figure 2 , Figure 3 As shown, the first valve core 20 is arranged to move along the first direction in the first chamber 11 to switch between the first conducting position and the first sealing position. Thus, the first valve core 20 moves along a fixed direction in the first chamber 11, which can improve the stability of the first valve core 20 moving between the first conducting position and the first sealing position.
[0070] Preferably, the first direction is a horizontal direction, which can reduce the moving space of the first valve core 20 in the vertical direction, thereby reducing the size of the first chamber 11 along the vertical direction, which is beneficial to reducing the size of the valve body 10, that is, reducing the volume of the exhaust valve 100.
[0071] Furthermore, the first chamber 11 includes a ventilation channel 111 and a first valve chamber 112, the ventilation channel 111 is connected to the second chamber 12, the first valve chamber 112 is connected to the exhaust port 13, the first valve core 20 is located in the first valve chamber 112, and the first valve chamber 112 and the ventilation channel 111 are arranged along the first direction.
[0072] Thus, the second chamber 12, the ventilation channel 111 and the first valve chamber 112 are connected in sequence, and the first valve chamber 112 and the ventilation channel 111 are arranged along the first direction, so that the first valve core 20 can move along the first direction in the first valve chamber 112 to the first sealing position to isolate the ventilation channel 111 and the first valve chamber 112, thereby realizing the isolation between the second chamber 12 and the exhaust port 13.
[0073] Furthermore, a vertical partition 113 is provided between the ventilation channel 111 and the first valve chamber 112, and an intermediate air port is provided on the vertical partition 113. When the first valve core 20 cooperates with the intermediate air port, it is located in a first sealing position, and when the first valve core 20 is away from the intermediate air port, it is located in a first conducting position.
[0074] Thus, when the first valve core 20 cooperates with the middle air port and is located at the first sealing position, the first valve core 20 isolates the first valve chamber 112 and the ventilation channel 111, thereby realizing isolation between the second chamber 12 and the exhaust port 13. When the first valve core 20 is away from the middle air port and is located at the first conducting position, the first chamber 11 and the ventilation channel 111 are connected, thereby realizing communication between the second chamber 12 and the exhaust port 13.
[0075] Furthermore, the ventilation channel 111 includes a connected lower channel 1112 and an upper channel 1111. In the second direction, the upper channel 1111 is located above the lower channel 1112, the lower end of the lower channel 1112 is connected to the second chamber 12, and the horizontal side of the upper channel 1111 is a vertical partition 113 with an intermediate air port.
[0076] Thus, the ventilation channel 111 is connected to the first valve chamber 112 at the upper channel 1111 , and when the first valve core 20 is located at the first sealing position, the first valve core 20 cooperates with the vertical partition 113 to seal the middle air port, thereby realizing the isolation between the first valve chamber 112 and the ventilation channel 111 .
[0077] Further, the lower channel 1112 extends along the first direction, the upper channel 1111 extends along the second direction, and a portion of the projection of the lower channel 1112 along the second direction coincides with the projection of the upper channel 1111 along the second direction.
[0078] Thus, the flow area of the gas entering the lower channel 1112 along the second direction can be increased, and the flow area of the gas flowing from the upper port 16 to the first valve chamber 112 along the first direction can be increased. Thus, the flow rate of the gas entering the ventilation channel 111 and the flow rate of the gas flowing out of the ventilation channel 111 can be increased, that is, the flow rate of the gas flowing through the ventilation channel 111 per unit time can be increased.
[0079] In some embodiments, Figure 2 , Figure 3 As shown, the valve body 10 further includes: a communication chamber 15 having an upper opening 16 communicating with the first chamber 11 and a lower opening 17 communicating with the second chamber 12 . In the second direction, the communication chamber 15 is located between the first chamber 11 and the second chamber 12 .
[0080] Therefore, the first chamber 11 and the second chamber 12 are interconnected through the connecting chamber 15, and the connecting chamber 15 can form a buffer space between the first chamber 11 and the second chamber 12. When liquid enters the second chamber 12 from the air inlet 14, the connecting chamber 15 can separate the first chamber 11 and the second chamber 12, thereby reducing or avoiding liquid from passing through the connecting chamber 15 from the second chamber 12 and entering the first chamber 11.
[0081] Further, when the ventilation channel 111 includes a lower channel 1112 and an upper channel 1111 that are connected, the communication cavity 15 is connected to the lower channel 1112 at the upper opening 16 , thereby achieving mutual communication between the ventilation channel 111 and the communication cavity 15 .
[0082] Furthermore, when the second valve core 30 is located at the second sealing position, the second valve core 30 closes the lower opening 17. At this time, the second valve core 30 separates the second chamber 12 and the connecting chamber 15, and the connecting chamber 15 can be connected to the first chamber 11 through the upper opening 16, thereby realizing the isolation between the first chamber 11 and the air inlet 14.
[0083] Furthermore, in the second direction, the second valve core 30 is adapted to move under the action of an external force to close the lower opening 17 .
[0084] It should be noted that the external force is the force other than the gravity and the supporting force along the gravity direction on the valve core. For example, when liquid enters the second chamber 12, the buoyancy generated by the liquid on the second valve core 30 is the external force on the second valve core 30. In other words, when the liquid in the second valve core 30 reaches a certain amount, the second valve core 30 can be maintained in the second sealing position to ensure the separation between the second chamber 12 and the connecting chamber 15, thereby reducing or preventing the liquid from flowing into the first chamber 11.
[0085] Therefore, the second valve core 30 can be affected by the environment in which the exhaust valve 100 is located, and move accordingly under the action of external environmental forces to close the lower opening 17, reducing or preventing liquid from flowing into the first chamber 11 and leaking from the exhaust port 13, thereby improving the reliability of the exhaust valve 100.
[0086] Preferably, the second direction is a vertical direction. When the second valve core 30 moves upward under the action of an external force to close the lower opening 17, if there is liquid in the communication chamber 15 and the liquid flows to the top of the second valve core 30, at this time, the liquid can generate a downward force on the second valve core 30 under the action of gravity, so that the second valve core 30 can overcome the external force and move downward to leave the lower opening 17, so that the liquid in the communication chamber 15 can flow downward to the second chamber 12 through the lower opening 17. After the liquid in the communication chamber 15 flows into the second chamber 12, the second valve core 30 is no longer subjected to the downward force generated by the gravity of the liquid, so that the second valve core 30 returns to the second sealing position under the action of the external force and closes the lower opening 17.
[0087] For example, when the exhaust valve 100 is applied to the oil tank 200, after the oil tank 200 is refueled for the first time, the oil in the oil tank 200 enters the second chamber 12 through the air inlet 14, so that the second valve core 30 floats and closes the lower opening 17, thereby reducing or preventing the oil in the oil tank 200 from leaking through the exhaust valve 100. When the oil tank 200 needs to be refueled for the second time, the added oil can generate downward pressure on the second valve core 30 in the connecting chamber 15, and the second valve core 30 can overcome the external force and move downward to leave the lower opening 17, so that the oil in the connecting chamber 15 can flow downward to the second chamber 12 through the lower opening 17 and enter the oil tank 200, thereby realizing the second refueling of the oil tank 200. After the second refueling is completed, the second valve core 30 can return to the second sealing position under the action of external force and close the lower opening 17, maintaining the partition between the air inlet 14 and the exhaust port 13, reducing or preventing the oil in the oil tank 200 from leaking through the exhaust valve 100.
[0088] Preferably, a sealing protrusion 36 is provided on the top of the second valve core 30 , and when the second valve core 30 is located at the second sealing position, at least a portion of the sealing protrusion 36 is inserted into the lower opening 17 .
[0089] It is understandable that the second valve core 30 at least partially moves in the up-down direction between the second sealing position and the second conducting position. When the second valve core 30 is located at the second sealing position, at least a portion of the sealing protrusion 36 is inserted upward into the lower opening 17 .
[0090] Thus, the lower through port 17 can provide a limiting effect on the matching position of the sealing protrusion 36, thereby improving the stability of the second valve core 30 in the second sealing position.
[0091] Furthermore, the cross section of the sealing protrusion 36 is consistent with the shape of the lower opening 17. The cross section of the sealing protrusion 36 gradually decreases in the upward direction, the cross section area of the uppermost end of the sealing protrusion 36 is smaller than the area of the lower opening 17, and the cross section area of the lowermost end of the sealing protrusion 36 is larger than the area of the lower opening 17.
[0092] Thus, when the second valve core 30 is located at the second sealing position, the sealing protrusion 36 is partially inserted into the lower opening 17, and the sealing protrusion 36 is tightly attached to the edge of the lower opening 17 on its side surface along the circumferential direction, so that the sealing protrusion 36 can seal the lower opening 17, thereby improving the sealing between the connecting cavity 15 and the second chamber 12, and further reducing or avoiding the liquid in the second chamber 12 from flowing to the connecting cavity 15 through the lower opening 17.
[0093] In some embodiments, Figure 2 , Figure 3As shown, a guide post 50 is further disposed in the second chamber 12 . The guide post 50 extends along the second direction, and the second valve core 30 is slidably connected to the guide post 50 .
[0094] Therefore, the guide column 50 can limit the moving direction of the second valve core 30, thereby improving the stability of the second valve core 30 moving between the second sealing position and the second conduction position, so that the second valve core 30 can accurately move to the second sealing position, ensuring the sealing effect on the lower opening 17 when the second valve core 30 is in the second sealing position.
[0095] Furthermore, the exhaust valve 100 further includes a first elastic member 40 , which is connected to the valve body 10 and the second valve core 30 to provide an upward thrust to the second valve core 30 .
[0096] Thus, when the second valve core 30 is located at the second conducting position, the first elastic member 40 can exert a tendency on the second valve core 30 to move along the guide column 50, that is, the second valve core 30 has a tendency to move toward the second sealing position. When the exhaust valve 100 tilts to a certain angle, the pressure of the second valve core 30 on the first elastic member 40 is reduced, so that the first elastic member 40 can push the second valve core 30 to move along the guide column 50 to the second sealing position. The second valve core 30 is isolated from the first chamber 11 and the second chamber 12.
[0097] When the second valve core 30 is located at the second sealing position, the first elastic member 40 can improve the stability of the second valve core 30 at the second sealing position.
[0098] Preferably, when the exhaust valve 100 is disposed in the oil tank 200 , if the oil tank 200 is tilted, the first elastic member 40 can push the second valve core 30 to the second sealing position, thereby reducing or preventing oil from leaking from the exhaust valve 100 .
[0099] Furthermore, the first elastic member 40 is sleeved on the guide column 50, and a cavity is provided on the second valve core 30, and the cavity cooperates with the guide column 50 to fix the second valve core 30. Thus, the guide column 50 can support the first elastic member 40 and limit the deformation direction of the first elastic member 40, thereby improving the stability of the first elastic member 40 applying thrust to the second valve core 30.
[0100] Preferably, when the first elastic member 40 is a spring, the spring is sleeved on the guide post 50 , and the spring is located between the second valve core 30 and the guide post 50 .
[0101] In some embodiments, Figure 3As shown, when the second valve core 30 is located at the second sealing position, the second valve core 30 is connected to the guide column 50. That is to say, the second valve core 30 is connected to the guide column 50 between the second conduction position and the second sealing position. Thus, the stability of the second valve core 30 when located at the second sealing position can be improved, and the stability of the second valve core 30 moving between the second conduction position and the second sealing position can also be improved, thereby improving the reliability of the second valve core 30, that is, improving the reliability of the exhaust valve 100.
[0102] In some embodiments, Figure 2 , Figure 3 As shown, the valve body 10 further includes: a tilting port 18 , the tilting port 18 is connected to the communication chamber 15 , and the tilting port 18 is suitable for connecting to the anti-tilt valve 400 .
[0103] It is understandable that, taking the exhaust valve 100 disposed in the oil tank 200 as an example, when the oil tank 200 tilts or turns over, the air pressure in the oil tank 200 increases or the exhaust valve 100 bears the gravity of part of the oil, which easily causes oil leakage at the exhaust valve 100. When the anti-tilt valve 400 does not tilt or turn over, the anti-tilt valve 400 is opened to connect the inside of the oil tank 200 with the connecting chamber 15 through the anti-tilt valve 400; when the anti-tilt valve 400 tilts to a certain angle or turns over, the anti-tilt valve 400 is closed, and the inside of the oil tank 200 and the connecting chamber 15 are sealed at the anti-tilt valve 400.
[0104] Therefore, by providing the tilt port 18 to communicate with the anti-tilt valve 400, when the oil tank 200 tilts to a certain angle or turns over, the anti-tilt valve 400 can be closed, so that the inside of the oil tank 200 and the connecting chamber 15 are sealed at the anti-tilt valve 400, and the second valve core 30 can be kept in the sealed position. Thus, the first chamber 11 can be isolated from the inside of the oil tank 200, reducing or preventing the liquid in the oil tank 200 from entering the first chamber 11 and leaking from the exhaust port 13.
[0105] In some embodiments, Figure 4-Figure 6 As shown, the lower port 17 includes a main port 171 and a sub-port 172 that are spaced apart from each other, and the second valve core 30 includes a main valve core 31 and a sub-valve core 32 .
[0106] When the second valve core 30 is in the second sealing position, the main valve core 31 closes the main port 171, and the sub-valve core 32 closes the secondary port 172. At this time, the connecting chamber 15 and the second chamber 12 can be isolated, thereby realizing the isolation between the air inlet 14 and the first chamber 11.
[0107] Furthermore, when the second valve core 30 is located at the second conducting position, the main valve core 31 is away from the main port 171, and the sub-valve core 32 is away from the secondary port 172. At this time, the connecting chamber 15 and the second chamber 12 are connected through the main port 171 and the secondary port 172 at the same time, which can improve the conduction efficiency of the liquid and gas between the connecting chamber 15 and the second chamber 12.
[0108] Furthermore, the second valve core 30 also has an intermediate position between the second conducting position and the second sealing position. When the second valve core 30 is at the intermediate position, the main valve core 31 closes the main port 171, and the sub-valve core 32 is away from the secondary port 172. The second valve core 30 moves sequentially between the second conducting position, the intermediate position, and the second sealing position.
[0109] It can be understood that in the process of the second valve core 30 moving from the second conducting position to the second sealing position, the main valve core 31 first closes the main port 171 after the second valve core 30 passes the middle position, and the sub-valve core 32 closes the secondary port 172 after the second valve core 30 reaches the second sealing position.
[0110] Therefore, the second chamber 12 and the communication chamber 15 have three communication conditions through the lower through hole 17 .
[0111] When the second valve core 30 is located at the second conducting position, the main valve core 31 is away from the main port 171, and the sub-valve core 32 is away from the secondary port 172. At this time, the connecting chamber 15 and the second chamber 12 are connected through the main port 171 and the secondary port 172 at the same time, which can improve the conduction efficiency of liquid and gas between the connecting chamber 15 and the second chamber 12.
[0112] When the second valve core 30 is located at the middle position, the main valve core 31 closes the main port 171 , the sub-valve core 32 is away from the secondary port 172 , and the communication chamber 15 and the second chamber 12 are communicated through the secondary port 172 at the same time.
[0113] When the second valve core 30 is in the second sealing position, the main valve core 31 closes the main port 171 and the sub valve core 32 closes the sub port 172. At this time, the connecting chamber 15 and the second chamber 12 can be isolated, thereby the air inlet 14 and the first chamber 11 can be isolated.
[0114] Further, the main valve core 31 is disposed in the second chamber 12, and the main valve core 31 has a receiving groove 33 and a vent hole 34, the receiving groove 33 is open upward, and the vent hole 34 passes through the main valve core 31 and communicates with the receiving groove 33. The sub-valve core 32 is movably disposed in the receiving groove 33, so that the receiving groove 33 can limit the moving space of the sub-valve core 32, thereby improving the stability of the movement of the sub-valve core 32.
[0115] At the same time, the sub-valve core 32 has a first position and a second position in the receiving groove 33, and the first position is higher than the second position. When the second valve core 30 is located at the second sealing position, the sub-valve core 32 separates the secondary port 172 from the receiving groove 33 at the first position, and when the second valve core 30 is located at the middle position, the sub-valve core 32 is located at the second position and away from the secondary port 172.
[0116] Thus, when the second valve core 30 is located at the middle position, the connecting chamber 15, the containing groove 33, the vent hole 34 and the second chamber 12 are connected in sequence, thereby realizing the connection between the second chamber 12 and the connecting chamber 15. Since the flow area of the vent hole 34 is small, it is possible to reduce or prevent the liquid in the second chamber 12 from passing through the vent hole 34 and entering the connecting chamber 15 from the containing groove 33, and at the same time, the second chamber 12 and the connecting chamber 15 can be connected to balance the air pressure difference between the second chamber 12 and the connecting chamber 15.
[0117] Preferably, the vent hole 34 is higher than the air inlet 14 , which can reduce or prevent the liquid entering the second chamber 12 from the air inlet 14 from entering the vent hole 34 .
[0118] In some embodiments, Figure 4-Figure 6 As shown, the second valve core 30 further includes: a second elastic member 35 , and the second elastic member 35 connects the main valve core 31 and the sub-valve core 32 to provide an upward thrust to the sub-valve core 32 .
[0119] Thus, when the sub-valve core 32 is located at the first position, the second elastic member 35 can exert a tendency on the sub-valve core 32 to move along the guide column 50, that is, the sub-valve core 32 has a tendency to move toward the second position. When the exhaust valve 100 tilts to a certain angle, the pressure of the sub-valve core 32 on the second elastic member 35 is reduced, so that the second elastic member 35 can push the sub-valve core 32 to move along the guide column 50 to the second position. The sub-valve core 32 is isolated from the connecting cavity 15 and the receiving groove 33. When the sub-valve core 32 is located at the second position, the second elastic member 35 improves the stability of the sub-valve core 32 at the second position.
[0120] Preferably, when the exhaust valve 100 is arranged on the oil tank 200, when the oil tank 200 is tilted, the second elastic member 35 can push the sub-valve core 32 to the second position to isolate the connecting cavity 15 and the accommodating groove 33, that is, to isolate the air inlet 14 and the exhaust port 13, thereby reducing or avoiding oil leakage from the exhaust valve 100.
[0121] In some embodiments, Figure 7 As shown, a leakage hole 19 is provided at the bottom of the valve body 10, and the leakage hole 19 communicates the second chamber 12 with the interior of the oil tank 200. It can be understood that the leakage hole 19 communicates with the bottom of the second chamber 12.
[0122] Thus, the liquid at the bottom of the second chamber 12 can flow back to the space connected to the air inlet 14 through the liquid leakage hole 19 , thereby reducing or avoiding the generation of liquid residue in the second chamber 12 .
[0123] In some embodiments, when the exhaust valve 100 is empty and placed horizontally and the exhaust port 13 is located above the air inlet 14, the second valve core 30 is configured to be in the second conduction position, and the air inlet 14 is connected to the first chamber 11. Thus, the second valve core 30 is in the second conduction position without being subjected to external force, ensuring the communication between the air inlet 14 and the first chamber 11, and when the first valve core 20 is in the first conduction position, the communication between the air inlet 14 and the exhaust port 13 can be maintained.
[0124] It should be noted that when the exhaust valve 100 includes a first elastic member 40, when the initial position of the second valve core 30 is the second conduction position, the gravity of the second valve core 30 is greater than the thrust of the elastic member. At this time, the second valve core 30 is subjected to the downward gravity, the upward thrust from the elastic member and the upward supporting force from the valve body 10.
[0125] It is understandable that when no liquid enters the second chamber 12, or the exhaust valve 100 does not tilt, the second valve core 30 can be maintained at the second conduction position. When liquid enters the second chamber 12, the liquid can generate buoyancy on the second valve core 30, so that the second valve core 30 moves to the second sealing position under the combined action of the buoyancy and the first elastic member 40. Or when the exhaust valve 100 tilts to a certain angle, the gravity of the second valve core 30 borne by the first elastic member 40 is reduced, and the first elastic member 40 can push the second valve core 30 to move to the second sealing position.
[0126] like Figure 8 As shown, the fuel tank system 1000 according to an embodiment of the present invention comprises: a fuel tank 200, an exhaust pipe 300 and the exhaust valve 100 of the above embodiment. One end of the exhaust pipe 300 is connected to the outside of the fuel tank 200, the air inlet 14 of the exhaust valve 100 is connected to the inside of the fuel tank 200, and the exhaust port 13 is connected to the exhaust pipe 300.
[0127] The oil tank system 1000 of the present application adopts the exhaust valve 100 of the above-mentioned embodiment. The exhaust valve 100 integrates the first valve core 20 and the second valve core 30 on a valve body 10. This can simplify the structure of the exhaust valve 100, reduce the manufacturing cost of the exhaust valve 100, and reduce the volume of the exhaust valve 100, thereby facilitating the arrangement of the exhaust valve 100 in the oil tank 200.
[0128] In some embodiments, Figure 8As shown, the valve body 10 further includes: a roll port 18 and a connecting cavity 15 connected to each other, the connecting cavity 15 connecting the first chamber 11 and the second chamber 12. The oil tank system 1000 further includes: an anti-roll valve 400, which is arranged on the oil tank 200 and connected to the roll port 18.
[0129] It is understandable that when the oil tank 200 tilts or turns over, the air pressure in the oil tank 200 increases or the exhaust valve 100 bears the gravity of part of the oil, which easily causes oil leakage at the exhaust valve 100. When the anti-tilt valve 400 does not tilt or turn over, the anti-tilt valve 400 opens to connect the inside of the oil tank 200 with the connecting chamber 15 through the anti-tilt valve 400; when the anti-tilt valve 400 tilts to a certain angle or turns over, the anti-tilt valve 400 closes, and the inside of the oil tank 200 and the connecting chamber 15 are sealed at the anti-tilt valve 400.
[0130] Therefore, by providing the tilt port 18 to communicate with the anti-tilt valve 400, when the oil tank 200 tilts to a certain angle or turns over, the anti-tilt valve 400 can be closed, so that the inside of the oil tank 200 and the connecting chamber 15 are sealed at the anti-tilt valve 400, and the second valve core 30 can be kept in the second sealing position. Thus, the first chamber 11 can be isolated from the inside of the oil tank 200, reducing or preventing the liquid in the oil tank 200 from entering the first chamber 11 and leaking from the exhaust port 13.
[0131] In some embodiments, Figure 8 As shown, the fuel tank system 1000 further includes a carbon canister 500, which is connected to the exhaust pipe 300. Thus, liquid vapor in the gas flowing from the exhaust valve 100 to the exhaust pipe 300 can be absorbed in the carbon canister 500, thereby purifying the gas finally discharged to the outside of the fuel tank 200.
[0132] The exhaust valve 100 , the fuel tank system 1000 and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail herein.
[0133] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0134] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. An exhaust valve, characterized in that: include: A valve body, wherein a first chamber and a second chamber are connected to each other, the first chamber has an exhaust port connected to the outside of the oil tank, and the second chamber has an air inlet connected to the inside of the oil tank; a first valve core, the first valve core is disposed in the first chamber, the first valve core has a first conducting position for conducting the exhaust port and the second chamber, and a first sealing position for isolating the exhaust port and the second chamber; a second valve core, the second valve core is disposed in the second chamber, the second valve core has a second conducting position for conducting the air inlet and the first chamber, and a second sealing position for isolating the air inlet and the first chamber; The valve body further includes: a communication cavity, the communication cavity having an upper opening communicating with the first chamber and a lower opening communicating with the second chamber, and in the second direction, the communication cavity is located between the first chamber and the second chamber; The lower port includes a main port and a secondary port that are spaced apart, and the second valve core includes a main valve core and a sub-valve core; Wherein, when the second valve core is located at the second sealing position, the main valve core closes the main port, and the sub-valve core closes the sub-port; When the second valve core is located at the second conducting position, the main valve core is away from the main port, and the sub-valve core is away from the sub-port; The second valve core also has an intermediate position between the second conducting position and the second sealing position. When the second valve core is located at the intermediate position, the main valve core closes the main port, and the sub-valve core is away from the sub-port. The second valve core moves sequentially between the second conducting position, the intermediate position and the second sealing position; The main valve core is arranged in the second chamber, and the main valve core has a receiving groove and a vent hole, the receiving groove is open upward, and the vent hole passes through the main valve core and communicates with the receiving groove; The sub-valve core is movably disposed in the receiving groove, and the sub-valve core has a first position and a second position in the receiving groove, wherein the first position is higher than the second position; When the second valve core is located at the second sealing position, the sub-valve core separates the secondary port and the receiving groove at the first position, and when the second valve core is located at the middle position, the sub-valve core is located at the second position and away from the secondary port; When the second valve core is located at the second sealing position, the second valve core closes the lower opening; In the second direction, the second valve core is suitable for moving under the action of external force to close the lower opening.
2. The exhaust valve according to claim 1, characterized in that: The exhaust port is located above the air inlet, and the first chamber is located above the second chamber.
3. The exhaust valve according to claim 1, characterized in that: The first valve core is movably disposed in the first chamber along a first direction to switch between the first conducting position and the first sealing position.
4. The exhaust valve according to claim 3, characterized in that: The first chamber includes a ventilation channel and a first valve chamber, the ventilation channel is connected to the second chamber, the first valve chamber is connected to the exhaust port, the first valve core is located in the first valve chamber, and the first valve chamber and the ventilation channel are arranged along the first direction.
5. The exhaust valve according to claim 4, characterized in that: A vertical partition is provided between the ventilation channel and the first valve chamber, and an intermediate air port is provided on the vertical partition. When the first valve core cooperates with the intermediate air port, it is located at the first sealing position, and when the first valve core is away from the intermediate air port, it is located at the first conducting position.
6. The exhaust valve according to claim 5, characterized in that The ventilation channel includes a lower channel and an upper channel that are connected. In the second direction, the upper channel is located above the lower channel, the lower end of the lower channel is connected to the second chamber, and a horizontal side of the upper channel is the vertical partition provided with the middle air port.
7. The exhaust valve according to claim 6, characterized in that The lower channel extends along the first direction, the upper channel extends along the second direction, and a portion of a projection of the lower channel along the second direction coincides with a projection of the upper channel along the second direction.
8. The exhaust valve according to claim 1, characterized in that A guide post is also disposed in the second chamber. The guide post extends along the second direction, and the second valve core is slidably connected to the guide post.
9. The exhaust valve according to claim 8, characterized in that Also includes: A first elastic member is connected to the valve body and the second valve core to provide an upward thrust to the second valve core.
10. The exhaust valve according to claim 9, characterized in that The first elastic member is sleeved on the guide column, and a cavity is provided on the second valve core. The cavity cooperates with the guide column to fix the second valve core.
11. The exhaust valve according to claim 8, characterized in that When the second valve core is located at the second sealing position, the second valve core is connected to the guide column.
12. The exhaust valve according to claim 1, characterized in that The valve body further comprises: a tilting port, the tilting port being connected to the communication cavity, and the tilting port being suitable for connecting to an anti-tilt valve.
13. The exhaust valve according to claim 1, characterized in that The vent hole is higher than the air inlet.
14. The exhaust valve according to claim 1, characterized in that The second valve core further includes: a second elastic member, wherein the second elastic member connects the main valve core and the sub-valve core to provide an upward thrust to the sub-valve core.
15. The exhaust valve according to any one of claims 1 to 14, characterized in that: A leakage hole is arranged at the bottom of the valve body, and the leakage hole communicates with the second chamber and the interior of the oil tank.
16. The exhaust valve according to any one of claims 1 to 14, characterized in that: When the exhaust valve is placed horizontally without liquid in it and the exhaust port is located above the air inlet, the second valve core is configured to be in the second conducting position, and the air inlet is communicated with the first chamber.
17. A fuel tank system, characterized in that: include: tank; an exhaust pipeline, one end of which is connected to the outside of the fuel tank; The exhaust valve according to any one of claims 1 to 16, wherein the air inlet of the exhaust valve is connected to the interior of the fuel tank, and the exhaust port is connected to the exhaust pipe.
18. The fuel tank system according to claim 17, characterized in that The valve body further comprises: a communicating tilting port and a communicating cavity, wherein the communicating cavity communicates the first cavity and the second cavity; The oil tank system further includes an anti-roll valve, which is arranged on the oil tank and is connected to the roll port.
19. A vehicle, characterized in that: Comprising the oil tank system as claimed in any one of claims 17-18; or, comprising the exhaust valve as claimed in any one of claims 1-16.