Combination valve and high-pressure oil tank

Abstract

The present invention discloses a combination valve and a high-pressure fuel tank, relating to the technical field of automotive parts. The combination valve comprises an upper cover, an upper housing, a lower housing, an oil filling control valve core, and an exhaust valve core. The upper housing comprises a liquid accumulation chamber, a first guide chamber, a second guide chamber, and an exhaust pipe. The upper end of the liquid accumulation chamber is connected to the upper cover, and the exhaust pipe is connected to the liquid accumulation chamber. The upper ends of the first and second guide chambers are connected to the liquid accumulation chamber. A window first is provided on the side wall of the first guide chamber, and an exhaust hole first is provided on the top of the first guide chamber. A window second is provided on the side wall of the second guide chamber, and an exhaust hole second is provided on the top of the second guide chamber. The lower housing encloses the first and second guide chambers, and a window third is provided on the side wall of the lower housing. The oil filling control valve core is slidably mounted within the first guide chamber, capable of floating and sealing the first exhaust hole. The exhaust valve core is mounted within the second guide chamber, capable of floating and sealing the second exhaust hole. Compared to the prior art, the combination valve and high-pressure fuel tank of the present invention can simplify the overall structure and reduce production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, in particular to a combination valve and a high-pressure oil tank. Background Art

[0002] When the engine of a traditional fuel vehicle is running continuously, the carbon canister can promptly transport the stored steam to the engine's intake system for reuse. Hybrid vehicles have two power systems, the engine and the electric motor. The engine does not work in pure electric mode. Gasoline is volatile and produces steam at normal temperature and pressure. When the engine stops, the carbon canister cannot handle the stored steam in time. When restarting, it has to handle the newly generated and stored steam at the same time, which can easily lead to reduced efficiency, saturation or blockage of the carbon canister. The high-pressure fuel tank can store steam when the engine stops and release it to the carbon canister when it starts, avoiding overloading or failure of the carbon canister, reducing evaporative pollutant emissions, and meeting strict environmental emission standards.

[0003] The liquid level control valve and exhaust valve are common valves in high-pressure fuel tanks, typically located adjacent to each other to form a combination valve. During the filling process, when the oil reaches a certain level, the float of the liquid level control valve rises, while the float of the exhaust valve does not. Because the exhaust volume of the exhaust valve is small, far less than the volume released during refueling, the tank pressure will still rise rapidly, causing the nozzle to trip. At this point, the oil level in the high-pressure tank is at its maximum.

[0004] In existing combination valves, the liquid level control valve has a first sidewall and a first lower cover, while the exhaust valve has a second sidewall and a second lower cover. Both sidewalls 1 and 2 are assembled to the upper housing, while the first lower cover is assembled to the first sidewall, and the second lower cover is assembled to the second sidewall. In this combination valve structure, the first and second sidewalls, as well as the first and second lower covers, need to be manufactured and assembled separately, which takes up a lot of space and increases production costs. Summary of the Invention

[0005] The object of the present invention is to provide a combination valve and a high-pressure oil tank to simplify the overall structure and reduce production costs.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention discloses a combination valve, comprising:

[0008] An upper cover is used to be fixed on the top inner side of the high-pressure oil tank body;

[0009] The upper shell comprises a liquid accumulation chamber, a first guide chamber, a second guide chamber, and an exhaust pipe; the liquid accumulation chamber opens upward, and the upper end of the guide chamber is connected to the upper cover; the exhaust pipe is connected to the liquid accumulation chamber; the first guide chamber and the second guide chamber both open downward, and the upper ends are connected to the liquid accumulation chamber; the side wall of the first guide chamber is provided with a first window, and the top of the first guide chamber is provided with a first exhaust hole connected to the liquid accumulation chamber; the side wall of the second guide chamber is provided with a second window, and the top of the second guide chamber is provided with a second exhaust hole connected to the liquid accumulation chamber;

[0010] The lower shell has an upward opening and an upper end connected to the liquid accumulation chamber; the lower shell covers the first guide chamber and the second guide chamber; a side wall of the lower shell is provided with a third window;

[0011] An oil filling control valve core is slidably installed in the guide cavity 1 and can float up and block the exhaust hole 1;

[0012] The exhaust valve core is installed in the second guide cavity and can float up and block the second exhaust hole.

[0013] Preferably, the distance between the window three and the upper cover is 18-22 mm.

[0014] Preferably, the depth of the effusion cavity is 4-6 mm.

[0015] Preferably, a dividing rib is provided on the bottom upper surface of the liquid accumulation chamber, and the height of the dividing rib is less than the depth of the liquid accumulation chamber; the exhaust hole 1 and the exhaust hole 2 are located on one side of the dividing rib, and one end of the exhaust pipe connected to the liquid accumulation chamber is located on the other side of the dividing rib.

[0016] Preferably, the oil filling control valve core includes a float, a sealing gasket and a spring; the float is slidably installed in the guide cavity along the up and down directions; the sealing gasket is fixed to the upper end of the float to seal the exhaust hole; the spring is located between the lower shell and the float to support the float.

[0017] Preferably, the exhaust valve core includes a float 2, a sealing gasket 2 and a spring 2; the float 2 is slidably installed in the guide cavity 2 along the up and down directions, and the upper end of the float 2 has a slope; the upper end of the sealing gasket 2 is fixed on the slope, and the lower end of the sealing gasket 2 can be separated from the slope, and the sealing gasket 2 is used to seal the exhaust hole 2; the spring 2 is located between the lower shell and the float 2.

[0018] Preferably, a groove is provided on the inclined surface, and the second part of the sealing gasket covers the groove.

[0019] Preferably, a protrusion is provided on the outer surface of the side wall of the lower shell, and the upper shell is connected to a snap ring for snap-fitting with the protrusion.

[0020] Preferably, the cross section of at least one of the guide cavity 1 and the guide cavity 2 is non-circular.

[0021] The present invention also discloses a high-pressure oil tank, comprising the above-mentioned combination valve, a box body and a wave-breaking plate; the upper cover is fixed at the top inner center position of the box body, and the wave-breaking plate is fixed on the inner wall of the box body.

[0022] Compared with the related art, the present invention has achieved the following technical effects:

[0023] In the present invention, guide cavity 1 and guide cavity 2 are both part of the upper housing and do not need to be assembled separately thereto. The lower housing simultaneously houses guide cavity 1 and guide cavity 2, eliminating the need for separate lower covers for guide cavity 1 and guide cavity 2. Therefore, the above-described structure of this embodiment reduces the number of parts, simplifies the assembly process, reduces mold investment, and lowers production costs.

[0024] In the preferred embodiment of the present invention, the distance between the third window and the upper cover is 18-22 mm, and the depth of the liquid accumulation cavity is 4-6 mm, which increases the oil filling amount in the box body of the high-pressure oil tank, thereby extending the cruising range.

[0025] In the preferred embodiment of the present invention, the cross-section of at least one of the guide cavity one and the guide cavity two is non-circular, so as to obtain a flatter cross-sectional shape in the direction of the connecting line between the guide cavity one and the guide cavity two. The above-mentioned non-circular special shape can not only circumferentially limit the float one and the float two, but also reduce the overall size, which is beneficial to increase the oil filling volume of the high-pressure oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 is a schematic diagram of a high-pressure oil tank in some examples of the present invention;

[0028] Figure 2 Schematic diagram of the positional relationship of some components integrated on the high-pressure fuel tank in some examples of the present invention;

[0029] Figure 3 Schematic diagram of a combination valve in some examples of the present invention;

[0030] Figure 4 Schematic diagram of the upper cover in some examples of the present invention;

[0031] Figure 5 A schematic diagram of an upper housing from one perspective in some examples of the present invention;

[0032] Figure 6 A schematic diagram of the upper housing from another perspective in some examples of the present invention;

[0033] Figure 7 Schematic diagram of the upper shell from a bottom perspective in some examples of the present invention;

[0034] Figure 8 A schematic diagram of a lower housing from one perspective in some examples of the present invention;

[0035] Figure 9 A schematic diagram of another perspective of the lower housing in some examples of the present invention;

[0036] Figure 10 A schematic diagram of an oil filling control valve core from one perspective in some examples of the present invention;

[0037] Figure 11 A schematic diagram of an oil-filled control valve core from another perspective in some examples of the present invention;

[0038] Figure 12 A schematic diagram of an exhaust valve core from one perspective in some examples of the present invention;

[0039] Figure 13 A schematic diagram of an exhaust valve core from another perspective in some examples of the present invention;

[0040] Figure 14 for Figure 12 The middle structure is a schematic diagram after omitting the sealing gasket 2;

[0041] Figure 15 It is a front view of a combination valve in some examples of the present invention;

[0042] Figure 16 A top view of a combination valve in some examples of the present invention;

[0043] Figure 17 for Figure 16 Cross-sectional view of the structure along the AA direction.

[0044] In the picture:

[0045] 1-Combination valve;

[0046] 10-upper cover; 20-upper housing; 30-lower housing; 40-oil filling control valve core; 50-exhaust valve core;

[0047] 11-hook;

[0048] 21 - fluid chamber; 22 - guide chamber 1; 23 - guide chamber 2; 24 - exhaust pipe; 25 - snap ring;

[0049] 211-separating reinforcement;

[0050] 221- Exhaust hole 1; 222- Anti-sway rib 1; 223- Window 1;

[0051] 231 - Exhaust hole 2; 232 - Anti-sway rib 2; 233 - Bar protrusion; 234 - Window 2;

[0052] 31-window three; 32-protrusion;

[0053] 41- float 1; 42- sealing gasket 1; 43- spring 1;

[0054] 51- Floating body 2; 52- Sealing pad 2; 53- Spring 2;

[0055] 511- inclined surface; 512- groove; 513- strip groove;

[0056] 2- High-pressure fuel tank;

[0057] 60-box; 70-wave plate; 80-sealing plug; 90-fuel pipe;

[0058] 61-Hollow cylinder;

[0059] 71-bent plate 1; 72-bent plate 2; 73-bent portion 1; 74-bent portion 2; 75-mesh. DETAILED DESCRIPTION

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0061] The object of the present invention is to provide a combination valve and a high-pressure oil tank to increase the maximum oil volume of the high-pressure oil tank.

[0062] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0063] Reference Figures 1 to 17 This embodiment provides a combination valve 1, including an upper cover 10, an upper shell 20, a lower shell 30, an oil filling control valve core 40 and an exhaust valve core 50.

[0064] The upper cover 10 is used to be fixed to the top inner side surface of the housing 60 of the high-pressure oil tank 2. The upper shell 20 has a liquid accumulation chamber 21, a guide chamber 1 22, a guide chamber 2 23 and an exhaust pipe 24. The liquid accumulation chamber 21 opens upward, and the upper end is connected to the upper cover 10. The exhaust pipe 24 is connected to the liquid accumulation chamber 21. Both the guide chamber 1 22 and the guide chamber 2 23 open downward, and the upper ends are connected to the liquid accumulation chamber 21. The side wall of the guide chamber 1 22 is provided with a window 1 223 for gas and gasoline to pass through. The top of the guide chamber 1 22 is provided with an exhaust hole 1 221 connected to the liquid accumulation chamber 21, mainly for gas to pass through. The side wall of the guide chamber 2 23 is provided with a window 2 234 for gas and gasoline to pass through. The top of the guide chamber 2 23 is provided with an exhaust hole 2 231 connected to the liquid accumulation chamber 21, mainly for gas to pass through. The lower shell 30 opens upward, and the upper end is connected to the liquid accumulation chamber 21. The lower housing 30 encloses guide chamber 1 22 and guide chamber 2 23. A vertical partition separates guide chamber 1 22 from guide chamber 2 23. A window 3 31 is provided on the sidewall of the lower housing 30. An oil filling control valve core 40 is slidably mounted within guide chamber 1 22, capable of floating upward and blocking exhaust hole 1 221. An exhaust valve core 50 is mounted within guide chamber 23, capable of floating upward and blocking exhaust hole 2 231.

[0065] The working principle of the combination valve 1 in this embodiment is as follows:

[0066] During the process of the oil gun filling the box body 60 of the high-pressure oil tank 2 with oil, as the liquid level in the box body 60 of the high-pressure oil tank 2 rises, the gas in the box body 60 of the high-pressure oil tank 2 enters the liquid accumulation chamber 21 through window three 31, window one 223 and exhaust hole one 221 on the one hand, and enters the liquid accumulation chamber 21 through window three 31, window two 234 and exhaust hole two 231 on the other hand, and then the gas flows into the carbon canister through the exhaust pipe 24.

[0067] As the liquid level gradually covers the oil filling control valve core 40 and the exhaust valve core 50, the buoyancy of the oil filling control valve core 40 and the exhaust valve core 50 gradually increases, and both float up and block the exhaust hole 1 221 and the exhaust hole 2 231 respectively, and the exhaust process is interrupted.

[0068] The oil gun continues to fill oil, and the pressure in the box body 60 of the high-pressure oil tank 2 will increase, triggering the gun jumping action of the oil chamber. The oil filling process is completed and the gasoline is fully filled.

[0069] In this embodiment, guide cavity 1 22 and guide cavity 2 23 are both part of the upper housing 20 (i.e., integrally connected), and do not need to be separately assembled on the upper housing 20. Lower housing 30 simultaneously houses guide cavity 1 22 and guide cavity 2 23, eliminating the need for separate lower covers for guide cavity 1 22 and guide cavity 2 23. Therefore, the above-described structure of this embodiment reduces the number of parts, simplifies the assembly process, reduces mold investment, and lowers production costs.

[0070] In some examples, the distance between the window 31 and the upper cover 10 (i.e., the distance between the axis of the window 31 and the upper surface of the upper cover 10) is 18-22 mm, preferably 20 mm. The depth of the effusion cavity 21 is 4-6 mm, preferably 5 mm.

[0071] In the prior art, the distance between window 31 and the upper cover 10 is typically 35 mm, resulting in a large amount of unfilled oil space in the upper portion of the high-pressure fuel tank 2's housing 60. This embodiment reduces the distance between window 31 and the upper cover 10, thereby increasing the oil volume within the housing 60 of the high-pressure fuel tank 2 and extending the cruising range.

[0072] To prevent the oil gun from prematurely tripping, the distance between window 31 and the upper cover 10 must be kept within a certain range. Calculations and sample testing show that a distance of 18-22mm between window 31 and the upper cover 10 and a depth of 4-6mm for the liquid chamber 21 ensures that the exhaust pressure during oil filling is less than 0.25 kPa.

[0073] For the same size of the high-pressure fuel tank 2, this embodiment can add 15mm more gasoline. If the cross-sectional area of ​​the high-pressure fuel tank 2 is 30 square decimeters, the corresponding gasoline volume is 4.5L, which can increase the cruising range by about 100 kilometers.

[0074] In some examples, in addition to window one 223, other through holes are provided on guide cavity one 22, in addition to window two 234, other through holes are provided on guide cavity two 23, and in addition to window three 31, other through holes are provided on lower shell 30 for passage of gas and gasoline.

[0075] In some examples, a limit post can be inserted into the window three 31 to engage with the stepped shape on the float one to limit the travel of the float one. At the same time, the position of the window three 31 can be adjusted, for example, lowered, to meet the requirement that the distance between the window three 31 and the upper cover 10 is greater than 20 mm.

[0076] In some examples, a dividing rib 211 is provided on the bottom upper surface of the fluid accumulating chamber 21. The height of the dividing rib 211 is less than the depth of the fluid accumulating chamber 21. The first and second exhaust holes 221 and 231 are located on one side of the dividing rib 211. The end of the exhaust pipe 24 connected to the fluid accumulating chamber 21 is located on the other side of the dividing rib 211.

[0077] When gasoline enters the liquid accumulation chamber 21 due to bumps, road inclination, air flow and other reasons, it will not directly enter the exhaust pipe 24 due to the obstruction of the separation rib 211, but will flow back to the guide chamber 1 22 and the guide chamber 2 23 after being retained for a period of time, thereby avoiding gasoline from entering the carbon canister as much as possible and ensuring the normal operation of the carbon canister.

[0078] In some examples, the oil filling control valve core 40 includes a float 41, a sealing gasket 42, and a spring 43. The float 41 is slidably mounted in the guide cavity 22 in the vertical direction. The sealing gasket 42 is fixed to the upper end of the float 41 to seal the exhaust hole 221. The spring 43 is located between the lower housing 30 and the float 41 to support the float 41.

[0079] When the tank is full of gasoline, or when the tank is not full but the gas pressure in the tank body 60 is relatively high, buoyancy can be provided to allow the sealing gasket 42 to block the exhaust hole 221 .

[0080] In some examples, the exhaust valve core 50 includes a second float 51, a second sealing gasket 52, and a second spring 53. The second float 51 is slidably mounted in the second guide cavity 23 in the vertical direction. The upper end of the second float 51 has an inclined surface 511. The upper end of the second sealing gasket 52 is fixed to the inclined surface 511, and the lower end of the second sealing gasket 52 can be separated from the inclined surface 511.

[0081] When the second sealing gasket 52 and the inclined surface 511 are in contact, the two have the same inclination angle. The second sealing gasket 52 is used to block the second exhaust hole 231. The lower end of the second exhaust hole 231 has the same inclination angle as the inclined surface 511. The second spring 53 is located between the lower shell 30 and the second float 51.

[0082] When the tank is full of gasoline, or when the tank is not full but the gas pressure in the tank body 60 is relatively high, buoyancy can be provided to allow the second sealing gasket 52 to block the second exhaust hole 231 .

[0083] The second sealing gasket 52 is tilted and fixed at the upper end. Its purpose is to pull only one end of the second sealing gasket 52 when the second floating body 51 descends, so that the second exhaust hole 231 is gradually opened to reduce the impact of airflow.

[0084] In some examples, a groove 512 is provided on the inclined surface 511 , and the second sealing gasket 52 partially covers the groove 512 .

[0085] Since there is an oil film between the second sealing gasket 52 and the inclined surface 511, the adsorption force between the two is relatively large. In this embodiment, the groove 512 is provided to allow gas to enter between the second sealing gasket 52 and the inclined surface 511, thereby facilitating the separation of the second sealing gasket 52 and the inclined surface 511.

[0086] In some examples, both sealing gasket 1 42 and sealing gasket 2 52 are made of rubber, while both float 1 41 and float 2 51 are made of phenolic resin. Rubber has a certain elastic deformation capacity, which can provide a better sealing effect. Phenolic resin has excellent thermal stability and wear resistance.

[0087] In some examples, a protrusion 32 is provided on the outer surface of the side wall of the lower shell 30 , and a snap ring 25 for snap-fitting with the protrusion 32 is connected to the upper shell 20 .

[0088] By elastically deforming the snap ring 25 , the protrusion 32 is slid into the snap ring 25 , thereby achieving assembly of the upper shell 20 and the lower shell 30 , which is simple and convenient.

[0089] In some examples, the liquid accumulating chamber 21 and the retaining ring 25, the liquid accumulating chamber 21 and the guide chamber 1 22, the liquid accumulating chamber 21 and the guide chamber 2 23, and the liquid accumulating chamber 21 and the exhaust pipe 24 are all fixedly connected by laser welding. The liquid accumulating chamber 21 is connected to the upper cover 10 by snap-fitting, and the upper cover 10 is connected to the housing 60 of the high-pressure fuel tank 2 by hot plate welding. Specifically, the upper cover 10 has a hook 11 for connecting to the liquid accumulating chamber 21, and the liquid accumulating chamber 21 has a slot for engaging with the hook 11.

[0090] In some examples, the cross-section of at least one of guide cavity 1 22 and guide cavity 2 23 has a non-circular shape, such as an arcuate shape (a superior arcuate shape larger than a semicircle), resulting in a relatively flat cross-section along the line connecting guide cavity 1 22 and guide cavity 2 23. Accordingly, float 1 41 has the same cross-sectional shape as guide cavity 1 22, with a gap between them to facilitate buoyancy of float 1 41; float 2 51 has the same cross-sectional shape as guide cavity 23, with a gap between them to facilitate buoyancy of float 2 51.

[0091] The above-mentioned non-circular special shape can not only limit the circumferential position of the first float 41 and the second float 51 , but also reduce the overall size, which is beneficial to increase the oil filling amount of the box body 60 of the high-pressure oil tank 2.

[0092] In some examples, the outer side surface of the second float 51 has a strip-shaped protrusion 233 extending in the up and down directions, and the inner side surface of the second guide cavity 23 is provided with a strip-shaped groove 513 extending in the up and down directions. The strip-shaped groove 513 slides with the strip-shaped protrusion 233 to prevent the second float 51 from circumferential rotation.

[0093] In some examples, the inner side of guide cavity 1 22 has multiple vertically extending anti-sway ribs 1 222, and the inner side of guide cavity 2 23 has multiple vertically extending anti-sway ribs 2 232. Anti-sway ribs 1 222 are used to stabilize float 1 41 and reduce its sway. Anti-sway ribs 232 are used to stabilize float 2 51 and reduce its sway. The gaps between adjacent anti-sway ribs 1 222 and between adjacent anti-sway ribs 232 allow gasoline to flow up and down.

[0094] In some examples, the height of window 31 is no higher than that of window 1 223 and window 2 234 to prevent window 1 223 and window 2 234 from being submerged by gasoline before window 3 31. Thus, before exhaust hole 1 221 and exhaust hole 2 231 are blocked, gas flowing through window 3 31 can always pass through window 1 223 and window 2 234.

[0095] In some examples, the length, width and height dimensions of the combination valve 1 are 93x65x83 mm, which are significantly smaller than the commonly used combination valve 1 of 120x100x110 mm, making it more convenient to arrange the valve in the box body 60 of the high-pressure oil tank 2.

[0096] This embodiment further provides a high-pressure oil tank 2, comprising the aforementioned combination valve 1, a box body 60, and a wave-breaking plate 70. The upper cover 10 is fixed to the top inner center of the box body 60, and the wave-breaking plate 70 is fixed to the inner wall of the box body 60.

[0097] Since the high-pressure oil tank 2 uses the above-mentioned combination valve 1, it also has the above-mentioned advantages of the combination valve 1, which will not be described here in detail.

[0098] In some examples, a hollow cylinder 61 is disposed between the upper and lower walls of the housing 60. The upper end of the hollow cylinder 61 is integrally connected to the upper wall, and the lower end of the hollow cylinder 61 is integrally connected to the lower wall. The hollow cylinder 61 serves as a reinforcement, reducing the variation in the distance between the upper and lower walls. Exemplarily, there are six hollow cylinders 61.

[0099] In some examples, a sealing plug 80 is further mounted in the middle of the upper wall of the housing 60. The sealing plug 80 is positioned adjacent to the combination valve 1. Removing the sealing plug 80 allows for easy assembly and disassembly of the combination valve 1 for maintenance. The sealing plug 80 can be mounted on the housing 60 by threaded engagement.

[0100] In some examples, the wave-breaking plate 70 is vertically arranged and includes two bent plates 1 71 and two bent plates 2 72. The bent plates 1 71 and the bent plates 2 72 have the same bending angle, and the two sides of the bending angle of the bent plate 1 71 and the two sides of the bending angle of the bent plate 2 72 are bending portion 1 73 and bending portion 2 74.

[0101] The bent portions 1 (73) of the two bent plates 1 (71) are located on either side of the combination valve 1, extending parallel to the length of the high-pressure fuel tank 2. The bent portions 1 (73) of the two bent plates 2 (72) are symmetrically distributed on either side of the combination valve 1, extending parallel to the length of the high-pressure fuel tank 2. The bent portion 1 (73) of the two bent plates 1 (71) is located between the bent portions 1 (73) of the two bent plates 2 (72).

[0102] The bent portions 2 74 of the two bent plates 72 are parallel to each other. For the bent plates 1 71 and 72 on the same side of the combination valve 1 , the bent portion 2 74 of the bent plate 1 71 is connected to the bent portion 1 73 of the bent plate 2 72 at one end facing away from the bent portion 1 73 of the bent plate 1 71 .

[0103] The first bending portion 73 and the second bending portion 74 both have meshes 75. The four second bending portions 74 are arranged around the sealing plug 80 to avoid the sealing plug 80.

[0104] Because gasoline can only flow through the wave shield 70 through the mesh 75, it can reduce the impact on the side walls of the tank 60, thereby providing a buffer for the gasoline. The curved shape not only redirects the gasoline flow, reducing the impact on the side walls of the tank 60, but also avoids certain structures inside the tank 60 (such as hollow columns), providing assembly flexibility.

[0105] In some examples, the high-pressure fuel tank 2 further includes a fuel filler pipe 90. The first end of the fuel filler pipe 90 is connected to the side wall of the tank 60, and the second end is adapted to connect to a fuel nozzle. The axis of the first end of the fuel filler pipe 90 is perpendicular to the longitudinal direction of the tank 60. This allows the fuel flowing out to be buffered and dissipated by the four first bends 73 and redirected by the four second bends 74, thereby reducing the impact on the side wall of the tank 60.

[0106] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A combination valve, characterized in that: include: An upper cover is used to be fixed on the top inner side of the high-pressure oil tank body; The upper shell comprises a liquid accumulation chamber, a first guide chamber, a second guide chamber, and an exhaust pipe; the liquid accumulation chamber opens upward, and the upper end of the guide chamber is connected to the upper cover; the exhaust pipe is connected to the liquid accumulation chamber; the first guide chamber and the second guide chamber both open downward, and the upper ends are connected to the liquid accumulation chamber; the side wall of the first guide chamber is provided with a first window, and the top of the first guide chamber is provided with a first exhaust hole connected to the liquid accumulation chamber; the side wall of the second guide chamber is provided with a second window, and the top of the second guide chamber is provided with a second exhaust hole connected to the liquid accumulation chamber; The lower shell has an upward opening and an upper end connected to the liquid accumulation chamber; the lower shell covers the first guide chamber and the second guide chamber; a side wall of the lower shell is provided with a third window; An oil filling control valve core is slidably installed in the guide cavity 1 and can float up and block the exhaust hole 1; an exhaust valve core installed in the second guide cavity, capable of floating up and blocking the second exhaust hole; A dividing rib is provided on the upper surface of the bottom of the liquid accumulation chamber, and the height of the dividing rib is less than the depth of the liquid accumulation chamber; the first and second exhaust holes are located on one side of the dividing rib, and one end of the exhaust pipe connected to the liquid accumulation chamber is located on the other side of the dividing rib; The exhaust valve core includes a second float, a second sealing gasket, and a second spring; the second float is slidably installed in the second guide cavity along the up-down direction, and the upper end of the second float has an inclined surface; the upper end of the second sealing gasket is fixed to the inclined surface, and the lower end of the second sealing gasket can be separated from the inclined surface, and the second sealing gasket is used to block the second exhaust hole; the second spring is located between the lower shell and the second float; A groove is provided on the inclined surface, and two parts of the sealing gasket cover the groove.

2. The combination valve according to claim 1, characterized in that: The distance between the window three and the upper cover is 18-22 mm.

3. The combination valve according to claim 1, characterized in that: The depth of the effusion cavity is 4-6 mm.

4. The combination valve according to claim 1, characterized in that: The oil filling control valve core includes a float, a sealing gasket and a spring; the float is slidably installed in the guide cavity along the up and down directions; the sealing gasket is fixed to the upper end of the float to seal the exhaust hole; the spring is located between the lower shell and the float to support the float.

5. The combination valve according to claim 1, characterized in that: The outer surface of the side wall of the lower shell is provided with a protrusion, and the upper shell is connected with a snap ring for snapping and matching with the protrusion.

6. The combination valve according to claim 1, characterized in that: A cross section of at least one of the first guide cavity and the second guide cavity is non-circular.

7. A high-pressure fuel tank, characterized in that: It comprises the combination valve according to any one of claims 1 to 6, and further comprises a box body and a wave-breaking plate; the upper cover is fixed at the inner center position of the top of the box body, and the wave-breaking plate is fixed on the inner wall of the box body.

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