An exhaust valve suitable for longitudinal compact oil tank

Abstract

The present invention relates to the field of automobile fuel tank valves, and specifically to an exhaust valve suitable for a longitudinal compact fuel tank, comprising: a shell, a group of chambers are arranged in the shell, the chambers include a liquid inlet chamber, an air outlet chamber and a flow channel chamber, a flow channel inlet extending from the bottom of the shell is arranged at the bottom of the liquid inlet chamber, an air outlet connected to the outside of the shell is arranged on the air outlet chamber, and the flow channel chamber connects the liquid inlet chamber and the air outlet chamber; a float, a sliding chamber for accommodating the longitudinal sliding of the float is arranged in the liquid inlet chamber, and the float is arranged in the sliding chamber; an exhaust port is arranged at the upper end of the liquid inlet chamber corresponding to the sliding stroke of the float, and the exhaust port connects the liquid inlet chamber and the flow channel chamber; a plug, the plug is movably arranged in the air outlet chamber, and the plug blocks the opening between the air outlet chamber and the flow channel chamber in a natural state, and a first elastic element is arranged at the lower end of the plug so that the plug elastically contacts the lower end of the opening. It can improve the anti-leakage performance and longitudinal compactness of the exhaust valve and adapt to the longitudinal compact fuel tank.

Description

Technical Field

[0001] The invention relates to the field of automobile oil tank valves, and in particular to an exhaust valve suitable for a longitudinal compact oil tank. Background Art

[0002] For traditional fuel vehicles, whether it is a metal tank or a plastic tank, a fuel pump is indispensable, including PHEV (electric hybrid) systems. In addition, the fuel tank system also needs to use multiple exhaust valves to ensure the safety of the vehicle during placement and driving. For the valves built into the tank, as the space for the PHEV system tank layout is limited, the tank is becoming flatter and flatter, which puts forward a lower closing height requirement for the built-in valve to meet the needs of refueling and exhaust.

[0003] At present, the closing height of the anti-roll valve on the market is generally above 20mm. The closing height is the distance from the oil level to the top of the inner side of the fuel tank when the oil floats up the valve core to the valve body is closed. This greatly limits the height of the fuel tank for electric hybrid vehicles and can no longer meet the design requirements of increasingly flat fuel tanks.

[0004] Existing anti-tilt valves, such as the Chinese invention patent No. 202311345893.9, disclose a slope exhaust valve. Due to the shaking of the oil in the oil tank, the oil enters the valve housing and pushes the float up together with the air flow. When the float rises, the sealing sheet immediately blocks the vent structure. In this process, the head valve is set in the head valve receiving seat, blocking the upper end of the vent to prevent the oil from entering the head valve receiving seat (i.e., the outlet flow channel). In order to take into account the anti-leakage function and the longitudinal compactness of the valve body, the head valve only relies on its own weight to block the vent. When the oil shakes, the head valve will also be affected, which makes it difficult to ensure the anti-leakage performance. In addition, when a large flow of exhaust is required, the head valve needs to be lifted to open the vent, which requires space to be reserved for the head valve to move upward. The longitudinal space of the valve body is difficult to compress, resulting in a high closing height of the oil tank, which is not suitable for longitudinally compact oil tanks. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides an exhaust valve suitable for a longitudinally compact oil tank, which can improve the leak-proof performance of the exhaust valve, reduce the closing height of the oil tank, and improve the longitudinal compactness of the exhaust valve to adapt to the longitudinally compact oil tank.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] An exhaust valve for a longitudinal compact oil tank: comprising:

[0008] A shell, wherein a group of chambers are arranged in the shell, the chambers include a liquid inlet chamber, an air outlet chamber and a flow channel chamber, a flow channel inlet extending out of the bottom of the shell is arranged at the bottom of the liquid inlet chamber, an air outlet communicating with the outside of the shell is arranged on the air outlet chamber, and the flow channel chamber communicates with the liquid inlet chamber and the air outlet chamber;

[0009] The float, the liquid inlet cavity is provided with a sliding cavity for accommodating the longitudinal sliding of the float, and the float is arranged in the sliding cavity; the liquid inlet cavity is provided with an exhaust port at the upper end corresponding to the sliding stroke of the float, and the exhaust port is connected with the liquid inlet cavity and the flow channel cavity;

[0010] A plug, which is movably arranged in the air outlet cavity, and blocks the opening between the air outlet cavity and the flow channel cavity in a natural state;

[0011] The air outlet cavity and the liquid inlet cavity are spaced apart in a direction perpendicular to the sliding direction of the float, the flow channel cavity as a whole extends in the spacing direction between the air outlet cavity and the liquid inlet cavity, the plug is arranged below the opening, and a first elastic element is provided at the lower end of the plug so that the plug elastically contacts the lower end of the opening.

[0012] Furthermore, in the exhaust valve of the longitudinal compact oil tank in the present application, a second elastic element is provided at the lower end of the float, and the second elastic element is used to apply a preset upward elastic force to the float, as a preferred solution of the present application, so as to offset part of the resistance to the upward movement of the float and improve the sensitivity of the float.

[0013] Furthermore, in the present application, an exhaust valve suitable for a longitudinal compact oil tank, the housing comprises:

[0014] A main shell body, on which are provided open compartments corresponding to the chambers;

[0015] A lower cover body, which is connected to the bottom of the main shell and is used to seal the openings of the opening compartments corresponding to the liquid inlet cavity and the gas outlet cavity, and the flow channel inlet is arranged on the lower cover body;

[0016] The upper cover body is connected to the upper end of the main shell body and is used to seal the opening of the opening compartment corresponding to the flow channel cavity.

[0017] Based on the above structure, the main shell is provided with a lower opening of the compartment corresponding to the liquid inlet cavity and the air outlet cavity, and an upper opening of the compartment corresponding to the flow channel cavity, and the upper and lower openings are sealed respectively by the lower cover body and the upper cover body. The shape of the upper and lower openings of the main shell is conducive to injection molding, and the shell is connected by three split parts, with a simple structure and good economy.

[0018] Furthermore, in the present application, an exhaust valve suitable for a longitudinal compact oil tank, the flow channel cavity includes a backflow section extending in the spacing direction between the liquid inlet cavity and the air outlet cavity, the bottom of the backflow section increases in height from the liquid inlet cavity to the air outlet cavity, and the opening is arranged at one end of the backflow section near the air outlet cavity. As a preferred solution of the present application, after the oil enters the flow channel cavity, it can flow back to the liquid inlet cavity through the backflow section, further improving the anti-leakage performance.

[0019] Furthermore, in the present application, an exhaust valve suitable for a longitudinal compact oil tank is provided with a first positioning column and a second positioning column on the lower cover body, the first positioning column and the second positioning column extend into the air outlet cavity and the liquid inlet cavity respectively, and the first elastic element and the second elastic element are compression springs respectively sleeved on the radial outer sides of the air outlet cavity and the liquid inlet cavity. As a preferred embodiment of the present application, a groove having a shape adapted to the second positioning column is provided at the bottom of the float to compress the longitudinal space.

[0020] Furthermore, in the present application, a vent valve suitable for a longitudinally compact oil tank is provided with a longitudinally extending notch at the upper end of the shell, the notch extends into the liquid inlet cavity in the longitudinal direction, and the notch extends out of the shell in the liquid inlet cavity in the transverse direction; a connecting convex portion is provided at a position on the shell corresponding to the transverse extension of the notch, and a flow channel groove with an upper end opening is provided on the connecting convex portion, and the notch extends transversely to the connecting flow channel groove. As a preferred solution of the present application, the notch forms an air vent of the liquid inlet cavity, and when the oil is higher than the flow channel inlet, the air in the oil tank exchanges with the liquid inlet cavity through the notch to balance the air pressure. The notch is longitudinally extended, which is convenient for setting an injection mold for molding the ribs in the longitudinal direction, reducing the molding difficulty of the vent. The connecting convex portion is used to connect the shell and the oil tank, and the corresponding connecting convex portion is provided with a locking structure for connecting the oil tank. The flow channel groove has the effect of blocking oil, preventing the oil from entering the liquid inlet cavity from the notch when shaking. While the flow channel groove is provided on the connecting convex portion to achieve the oil blocking effect, it has the advantage of good compactness of structure.

[0021] Furthermore, in the exhaust valve of the present application, which is suitable for a longitudinal compact oil tank, the float is cylindrical as a whole, and a group of longitudinally extending ridges are arranged at intervals on the inner wall of the liquid inlet cavity in the circumferential direction, and the float slides longitudinally on the inner side of the group of ridges; wherein the ridges form the inner edge of the sliding cavity and can reduce the contact area with the float to reduce the sliding resistance. A concave-convex matching circumferential limiting structure is arranged between the liquid inlet cavity and the side wall of the float, and the circumferential limiting structure is used to ensure the circumferential positioning between the float and the liquid inlet cavity.

[0022] Furthermore, in the present application, an exhaust valve suitable for a longitudinally compact oil tank is provided, and a limit groove adapted to the top of the second elastic element is provided at the bottom of the float, and an extension flow channel is provided on the float, and the extension flow channel extends upward from the limit groove to the upper end of the float. As a preferred embodiment of the present application, a limit groove is provided for positioning the spring, so that the float is sleeved on the upper end of the spring while taking into account the longitudinal compactness. The extension flow channel is used to exhaust the limit groove on the one hand, and on the other hand, since the limit groove is provided at the bottom of the float, the volume of the bottom of the float accounts for a smaller proportion of the total volume, that is, a shape that is light at the bottom and heavy at the top is formed, resulting in that when the oil submerges the bottom of the float, the float cannot be floated up in time, affecting the sensitivity of the valve body. Therefore, the extension flow channel also has the effect of reducing the volume of the upper end portion of the float corresponding to the limit groove, so as to enhance the sensitivity of the float to float up and block the air outlet.

[0023] Furthermore, in the present application, a degassing valve for a longitudinal compact oil tank is provided with a plurality of sensitivity adjustment notches on the float, and the sensitivity adjustment notches are arranged at a preset height from the bottom of the float. The sensitivity adjustment notches are used to increase the sensitivity of the float to float up after the bottom section of the float is immersed in oil.

[0024] Furthermore, in the exhaust valve of the present application, which is suitable for a longitudinal compact oil tank, a sealing gasket corresponding to the exhaust port is provided on the top of the float, the exhaust port is in an elongated strip shape, the sealing gasket is adapted to the shape of the exhaust port, one end of the sealing gasket in the length direction is connected to the float, and a blocking convex portion is provided in the exhaust port. As a preferred solution of the present application, the blocking convex portion is provided to prevent the sealing gasket from being sucked into the exhaust port.

[0025] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0026] The present invention provides an exhaust valve suitable for a longitudinal compact oil tank. When in use, the exhaust valve is integrally installed at the upper end of the oil tank. When the oil tank is in normal use, if the internal pressure is too large, the gas will pass through the opening from the flow channel inlet to push open the plug to achieve pressure relief. When the oil level rises due to oil shaking or refueling, it enters the liquid inlet cavity from the flow channel inlet. The float rises due to the buoyancy of the oil to block the exhaust port to prevent the oil from entering the flow channel cavity from the exhaust port when shaking, and blocks the air inside the oil tank from being discharged from the exhaust port, so as to feed back to the oil tank air pressure detection system in the refueling system during the refueling process to determine that the oil tank is refueled enough. When the oil shakes, while the float is blocking the flow channel inlet, if the oil enters the flow channel cavity, the plug elastically blocks the opening to prevent the oil from leaking out, and because the constant elastic force generated by the first elastic element can overcome the influence of the shaking on the plug, it can ensure that the plug blocks the opening. In addition, since the air outlet cavity and the liquid inlet cavity are spaced apart in a direction perpendicular to the sliding direction of the float, that is, the air outlet cavity is arranged radially outside the liquid inlet cavity, and the plug is arranged at the lower end of the opening, and the flow channel cavity extends in the spacing direction between the air outlet cavity and the liquid inlet cavity, it can be seen that the flow channel cavity as a whole is at the upper end of the liquid inlet cavity and the air outlet cavity. Then, on the one hand, the air outlet cavity is not above the flow channel cavity, and on the other hand, the plug is not above the flow channel cavity. Compared with the prior art, it saves the space for setting the plug at the upper end of the flow channel cavity and reserving the space for the longitudinal movement of the plug, and can improve the longitudinal compactness of the exhaust valve to adapt to the longitudinal compact oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of an exhaust valve suitable for a longitudinal compact oil tank in an embodiment of the present application;

[0028] Figure 2 A cross-sectional view of an exhaust valve suitable for a longitudinal compact fuel tank in an embodiment of the present application;

[0029] Figure 3 for Figure 2 Exploded diagram of each component;

[0030] Figure 4 It is a schematic plan view of the main housing in the embodiment of the present application;

[0031] Figure 5 for Figure 4 Sectional view in the AA direction;

[0032] Figure 6 It is a schematic plan view of a floating body in an embodiment of the present application;

[0033] Figure 7 for Figure 6 Cross-sectional view along the BB direction.

[0034] In the figure: 1-shell; 11-liquid inlet cavity; 110-notch; 111-flow channel inlet; 112-exhaust port; 1121-blocking convex portion; 113-rib portion; 12-air outlet cavity; 121-air outlet; 13-flow channel cavity; 130-backflow section; 131-opening; 132-thin flow hole; 14-main shell; 15-lower cover; 151-first positioning column; 152-second positioning column; 16-upper cover; 17-connecting convex portion; 170-flow channel groove;

[0035] 2-floating body; 20-limiting groove; 201-extended flow channel; 202-sensitivity adjustment notch; 2021-annular notch; 2022-recess; 2023-extended notch;

[0036] 3-plug; 4-first elastic element; 5-second elastic element; 6-sealing gasket. DETAILED DESCRIPTION

[0037] Combination Figures 1 to 3 The exhaust valve shown is suitable for a longitudinal compact oil tank, comprising:

[0038] The shell 1 has a group of chambers disposed therein, the chambers including a liquid inlet chamber 11, an air outlet chamber 12 and a flow channel chamber 13. The bottom of the liquid inlet chamber 11 is provided with a flow channel inlet 111 extending out of the bottom of the shell 1, the air outlet chamber 12 is provided with an air outlet 121 communicating with the outside of the shell 1, and the flow channel chamber 13 communicates with the liquid inlet chamber 11 and the air outlet chamber 12;

[0039] The float 2, the liquid inlet cavity 11 is provided with a sliding cavity for accommodating the longitudinal sliding of the float 2, and the float 2 is arranged in the sliding cavity; the liquid inlet cavity 11 is provided with an exhaust port 112 at the upper end corresponding to the sliding stroke of the float 2, and the exhaust port 112 communicates with the liquid inlet cavity 11 and the flow channel cavity 13;

[0040] The plug 3 is movably disposed in the air outlet cavity 12. In a natural state, the plug 3 blocks the opening 131 between the air outlet cavity 12 and the flow channel cavity 13;

[0041] The air outlet chamber 12 and the liquid inlet chamber 11 are spaced apart in a direction perpendicular to the sliding direction of the float 2, and the flow channel chamber 13 is extended as a whole in the spaced direction between the air outlet chamber 12 and the liquid inlet chamber 11. The plug 3 is arranged below the opening 131, and a first elastic element 4 is provided at the lower end of the plug 3 so that the plug 3 elastically contacts the lower end of the opening 131.

[0042] Based on the above structure, an exhaust valve suitable for a longitudinal compact oil tank is integrally installed at the upper end of the oil tank. When the oil tank is in normal use, if the internal pressure is too high, the gas will push the plug 3 from the flow channel inlet 111 through the opening 131 to achieve pressure relief. After the oil level rises due to oil shaking or refueling, it enters the liquid inlet chamber 11 from the flow channel inlet 111. The float 2 rises to block the exhaust port 112 due to the buoyancy of the oil to prevent the oil from entering the flow channel chamber 13 from the exhaust port 112 when shaking, and blocks the air inside the oil tank from being discharged from the exhaust port 112, so as to feed back to the oil tank air pressure detection system in the refueling system during the refueling process to determine that the oil tank is refueled enough. When the oil shakes, when the float 2 is blocking the flow channel inlet 111, if the oil enters the flow channel chamber 13, the plug 3 elastically blocks the opening 131 to prevent the oil from leaking out, and because the constant elastic force generated by the first elastic element 4 can overcome the influence of shaking on the plug 3, it can ensure that the plug 3 blocks the opening 131. In addition, since the air outlet cavity 12 and the liquid inlet cavity 11 are spaced apart in a direction perpendicular to the sliding direction of the float 2, that is, the air outlet cavity 12 is arranged on the radial outer side of the liquid inlet cavity 11, and the plug 3 is arranged at the lower end of the opening 131, and the flow channel cavity 13 extends in the spacing direction between the air outlet cavity 12 and the liquid inlet cavity 11, it can be known that the flow channel cavity 13 is at the upper end of the liquid inlet cavity 11 and the air outlet cavity 12 as a whole. Then, on the one hand, the air outlet cavity 12 is not above the flow channel cavity 13, and on the other hand, the plug 3 is not above the flow channel cavity 13. Compared with the prior art, it saves the space for setting the plug 3 at the upper end of the flow channel cavity 13 and reserving the space for the longitudinal movement of the plug 3, which can improve the longitudinal compactness of the exhaust valve to adapt to the longitudinal compact oil tank. In this embodiment, a normally open fine flow hole 132 is also provided between the air outlet cavity 12 and the flow channel cavity 13, and the fine flow hole 132 is used for small flow ventilation.

[0043] Furthermore, in this embodiment, a second elastic element 5 is provided at the lower end of the float 2, and the second elastic element 5 is used to apply a preset upward elastic force to the float 2 to offset part of the resistance to the upward movement of the float 2 and improve the sensitivity of the float 2. In this embodiment, the second elastic element 5 and the first elastic element 4 are both compression springs.

[0044] Furthermore, in this embodiment, the housing 1 includes:

[0045] A main housing 14, on which are provided open compartments corresponding to the chambers;

[0046] The lower cover 15 is connected to the bottom of the main housing 14. The lower cover 15 is used to seal the openings of the opening compartments corresponding to the liquid inlet chamber 11 and the air outlet chamber 12. The flow channel inlet 111 is arranged on the lower cover 15;

[0047] The upper cover 16 is connected to the upper end of the main shell 14 and is used to seal the opening of the opening compartment corresponding to the flow channel cavity 13 .

[0048] Based on the above structure, the main housing 14 is provided with a lower opening of the compartment corresponding to the liquid inlet chamber 11 and the air outlet chamber 12, and an upper opening of the compartment corresponding to the flow channel chamber 13, and the upper and lower openings are respectively sealed by the lower cover 15 and the upper cover 16. The shape of the upper and lower openings of the main housing 14 is conducive to injection molding, and the housing 1 is composed of three split parts, with a simple structure and good economy.

[0049] Combination Figure 2 As shown, in this embodiment, the flow channel cavity 13 includes a backflow section 130 extending in the spacing direction of the liquid inlet cavity 11 and the air outlet cavity 12, the bottom of the backflow section 130 increases in height in the direction from the liquid inlet cavity 11 to the air outlet cavity 12, and the opening 131 is arranged at the end of the backflow section 130 near the air outlet cavity 12. After the oil enters the flow channel cavity 13, it can flow back to the liquid inlet cavity 11 through the backflow section 130, further improving the anti-leakage performance. In this embodiment, the opening 131 is below the end of the backflow section 130 near the air outlet cavity 12. In other embodiments, the longitudinal position of the opening 131 can be consistent with the bottom of the backflow section 130 near the air outlet cavity 12.

[0050] In this embodiment, the lower cover 15 is provided with a first positioning column 151 and a second positioning column 152, which extend into the air outlet cavity 12 and the liquid inlet cavity 11 respectively, and the first elastic element 4 and the second elastic element 5 are compression springs respectively sleeved on the radial outer sides of the air outlet cavity 12 and the liquid inlet cavity 11. A groove having a shape adapted to the second positioning column 152 is provided at the bottom of the float 2 to compress the longitudinal space.

[0051] Combination Figure 4 and Figure 5 As shown, the upper end of the housing 1 is provided with a longitudinally extending notch 110, which extends into the liquid inlet chamber 11 in the longitudinal direction, and extends out of the housing 1 in the transverse direction of the liquid inlet chamber 11; a connecting protrusion 17 is provided on the housing 1 at a position corresponding to the transverse extension of the notch 110, and a flow channel groove 170 with an upper end opening is provided on the connecting protrusion 17, and the notch 110 extends transversely to the connecting flow channel groove 170. The notch 110 forms a vent for the liquid inlet chamber 11, and when the oil is higher than the flow channel inlet 111, the air in the oil tank exchanges with the liquid inlet chamber 11 through the notch 110 to balance the air pressure. The notch 110 is longitudinally extended, which is convenient for setting an injection mold for molding the rib 113 in the longitudinal direction, reducing the molding difficulty of the vent. The connecting protrusion 17 is used to connect the housing 1 and the oil tank, and the corresponding connecting protrusion 17 is provided with a locking structure for connecting the oil tank. The flow channel groove 170 has the effect of blocking oil, preventing the oil from entering the liquid inlet chamber 11 from the notch 110 when the oil shakes. The flow channel groove 170 is provided on the connecting protrusion 17 to achieve the oil blocking effect and has the advantage of good structural compactness. In this embodiment, the notch 110 is provided on the main housing 14.

[0052] Combination Figure 6 and Figure 7 As shown, in this embodiment, the float 2 is cylindrical as a whole, and a group of longitudinally extending ridges 113 are provided at intervals along the circumference of the inner wall of the liquid inlet chamber 11, and the float 2 slides longitudinally on the inner side of the group of ridges 113; wherein the ridges 113 form the inner edge of the sliding cavity and can reduce the contact area with the float 2 to reduce the sliding resistance. A concave-convex matching circumferential limiting structure is provided between the liquid inlet chamber 11 and the side wall of the float 2, and the circumferential limiting structure is used to ensure the circumferential positioning between the float 2 and the liquid inlet chamber 11. Specifically, in this embodiment, the circumferential limiting structure includes a longitudinally extending limiting convex portion provided on the inner wall of the liquid inlet chamber 11 and a corresponding concave portion provided on the side wall of the float 2.

[0053] In this embodiment, a limiting groove 20 adapted to the top of the second elastic element 5 is provided at the bottom of the float 2, and an extension channel 201 is provided on the float 2, and the extension channel 201 extends upward from the limiting groove 20 to the upper end of the float 2. The limiting groove 20 is provided to position the spring, so that the float 2 is sleeved on the upper end of the spring while taking into account the longitudinal compactness. The extension channel 201 is used to exhaust the limiting groove 20 on the one hand, and on the other hand, since the limiting groove 20 is provided at the bottom of the float 2, the volume of the bottom of the float 2 accounts for a small part of the total volume, that is, a shape of being light at the bottom and heavy at the top is formed, resulting in that when the oil submerges the bottom of the float 2, the float 2 cannot be floated up in time, affecting the sensitivity of the valve body. Therefore, the extension channel 201 also plays the role of reducing the volume of the upper end portion of the float 2 corresponding to the limiting groove 20, so as to improve the sensitivity of the float 2 floating up to block the air outlet 121.

[0054] Furthermore, in this embodiment, a plurality of sensitivity adjustment notches 202 are provided on the floating body 2, and the sensitivity adjustment notches 202 are arranged at a preset height from the bottom of the floating body 2. The sensitivity adjustment notches 202 are used to improve the sensitivity of floating body 2 after the bottom section of the floating body 2 is immersed in oil. In this embodiment, the sensitivity adjustment notches 202 include an annular notch 2021 arranged on the side wall of the floating body 2 and a group of recesses 2022 arranged in an array around the floating body 2, and the recesses 2022 are on the lower side of the annular notch 2021. In this embodiment, the limiting groove 20 is annular, and the sensitivity adjustment notch 202 also includes an extension notch 2023 arranged at the central convex part of the limiting groove 20 and extending longitudinally.

[0055] Combination Figure 2 As shown, in this embodiment, a sealing gasket 6 corresponding to the exhaust port 112 is provided on the top of the floating body 2. The exhaust port 112 is in a long strip shape as a whole. The sealing gasket 6 is adapted to the shape of the exhaust port 112. One end of the sealing gasket 6 in the length direction is connected to the floating body 2. A blocking convex portion 1121 is provided in the exhaust port 112. The blocking convex portion 1121 is provided to prevent the sealing gasket 6 from being sucked into the exhaust port 112.

[0056] The technical principles of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without creative work, and these methods will fall within the scope of protection of the present invention.

Claims

1. An exhaust valve suitable for a longitudinal compact fuel tank, comprising: A shell (1), wherein a group of chambers are provided in the shell (1), the chambers comprising a liquid inlet chamber (11), an air outlet chamber (12) and a flow channel chamber (13); a flow channel inlet (111) extending from the bottom of the shell (1) is provided at the bottom of the liquid inlet chamber (11); an air outlet (121) communicating with the outside of the shell (1) is provided on the air outlet chamber (12); and the flow channel chamber (13) communicates with the liquid inlet chamber (11) and the air outlet chamber (12); A floating body (2), wherein a sliding cavity for accommodating the longitudinal sliding of the floating body (2) is provided in the liquid inlet cavity (11), and the floating body (2) is arranged in the sliding cavity; an exhaust port (112) is provided at the upper end of the liquid inlet cavity (11) corresponding to the sliding stroke of the floating body (2), and the exhaust port (112) is connected to the liquid inlet cavity (11) and the flow channel cavity (13); A plug (3), the plug (3) being movably disposed in the air outlet cavity (12), and in a natural state, the plug (3) blocks an opening (131) between the air outlet cavity (12) and the flow channel cavity (13); The invention is characterized in that: the air outlet cavity (12) and the liquid inlet cavity (11) are spaced apart in a direction perpendicular to the sliding direction of the float (2); the flow channel cavity (13) is extended as a whole in the spaced direction between the air outlet cavity (12) and the liquid inlet cavity (11); the plug (3) is arranged below the opening (131); and a first elastic element (4) is provided at the lower end of the plug (3) so that the plug (3) elastically contacts the lower end of the opening (131); The housing (1) comprises: A main shell (14), the main shell (14) being provided with open compartments corresponding to the chambers; a lower cover body (15), the lower cover body (15) being connected to the bottom of the main shell (14), the lower cover body (15) being used to seal the openings of the opening compartments corresponding to the liquid inlet cavity (11) and the air outlet cavity (12), the flow channel inlet (111) being arranged on the lower cover body (15); An upper cover body (16), the upper cover body (16) being connected to the upper end of the main shell body (14), and the upper cover body (16) being used to seal the opening of the opening compartment corresponding to the flow channel cavity (13).

2. The exhaust valve for a longitudinal compact oil tank according to claim 1, characterized in that: A second elastic element (5) is provided at the lower end of the floating body (2), and the second elastic element (5) is used to apply a preset upward elastic force to the floating body (2).

3. The exhaust valve for a longitudinal compact oil tank according to claim 1, characterized in that: The flow channel cavity (13) comprises a backflow section (130) extending in the spacing direction between the liquid inlet cavity (11) and the air outlet cavity (12); the bottom of the backflow section (130) increases in height in the direction from the liquid inlet cavity (11) to the air outlet cavity (12); and the opening (131) is arranged at one end of the backflow section (130) close to the air outlet cavity (12).

4. The exhaust valve for a longitudinal compact oil tank according to claim 3, characterized in that: The lower cover body (15) is provided with a first positioning column (151) and a second positioning column (152), the first positioning column (151) and the second positioning column (152) respectively extend into the air outlet cavity (12) and the liquid inlet cavity (11), and the first elastic element (4) and the second elastic element (5) are compression springs respectively sleeved on the radial outer sides of the air outlet cavity (12) and the liquid inlet cavity (11).

5. The exhaust valve for a longitudinal compact fuel tank according to claim 1, characterized in that: A longitudinally extending notch (110) is provided at the upper end of the shell (1), the notch (110) extending into the liquid inlet cavity (11) in the longitudinal direction, and the notch (110) extending out of the shell (1) in the transverse direction of the liquid inlet cavity (11); a connecting protrusion (17) is provided on the shell (1) at a position corresponding to the transverse extension of the notch (110), the connecting protrusion (17) is provided with a flow channel groove (170) with an upper end opening, and the notch (110) extends transversely to the connecting flow channel groove (170).

6. The exhaust valve for a longitudinal compact oil tank according to claim 1, characterized in that: The float (2) is cylindrical in shape as a whole, and a group of longitudinally extending ridges (113) are provided at intervals in the circumferential direction on the inner wall of the liquid inlet cavity (11), and the float (2) slides longitudinally on the inner side of the group of ridges (113); a concave-convex matching circumferential limiting structure is provided between the liquid inlet cavity (11) and the side wall of the float (2).

7. The exhaust valve for a longitudinal compact oil tank according to claim 2, characterized in that: The bottom of the float (2) is provided with a limiting groove (20) adapted to the top of the second elastic element (5), and the float (2) is provided with an extension channel (201), the extension channel (201) extending upwards from the limiting groove (20) out of the upper end of the float (2).

8. The exhaust valve for a longitudinal compact oil tank according to claim 1, characterized in that: The floating body (2) is provided with a plurality of sensitivity adjustment notches (202), and the sensitivity adjustment notches (202) are arranged on the floating body (2) at a preset height from the bottom.

9. The exhaust valve for a longitudinal compact oil tank according to claim 1, characterized in that: A sealing gasket (6) corresponding to the exhaust port (112) is provided on the top of the float (2); the exhaust port (112) is in an elongated shape as a whole; the sealing gasket (6) is adapted to the shape of the exhaust port (112); one end of the sealing gasket (6) in the length direction is connected to the float (2); and a blocking protrusion (1121) is provided in the exhaust port (112).

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