CN214425118U - High-performance oil filling limit valve - Google Patents
High-performance oil filling limit valve Download PDFInfo
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- CN214425118U CN214425118U CN202023122941.2U CN202023122941U CN214425118U CN 214425118 U CN214425118 U CN 214425118U CN 202023122941 U CN202023122941 U CN 202023122941U CN 214425118 U CN214425118 U CN 214425118U
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Abstract
A high-performance oil filling limit valve comprises a shell, a float assembly and a bottom cover, wherein the shell is sleeved outside the float assembly, and the bottom cover is arranged at the bottom of the shell and is in contact with the bottom of the float assembly through a spring; the float assembly comprises a float shell, a sealing door and a float, the sealing door is assembled at the upper part of the float and is arranged in the float shell together with the float, the spring is installed between the bottom of the float and a bottom cover, and the float can move up and down in the float shell; the center of the upper end face of the floater shell is provided with a secondary opening vent hole, and the center of the sealing door is provided with a primary opening vent hole. The high-performance refueling metering valve realizes quick opening and pressure reduction under the condition of high pressure through a two-stage opening mode of the valve, and improves the safety of an oil tank and a vehicle system; by adopting a double-wall structure, the liquid dynamic leakage is zero under the dynamic condition; different closing heights are realized through modular design, and diversified requirements are met.
Description
Technical Field
The utility model relates to a car fuel management system technical field, concretely relates to high performance refuels limit valve.
Background
The refueling limit valve is an important part of an automobile fuel management system, the refueling limit valve directly determines the total volume of refueling volume when refueling, and meanwhile, the refueling limit valve gradually reduces along with fuel usage, and the valve can be timely opened to increase exhaust. It is known that the more liquid in a confined container, the less the liquid will slosh during movement of the container, and the less the liquid will slosh the greater the liquid will be. In the case of an automobile fuel tank, the larger the fuel sloshing is, the more the fuel vapor is generated and needs to be discharged, so that the fuel tank is prevented from expanding and deforming, and meanwhile, the great potential safety hazard is brought.
Along with the use of the fuel in the oil tank is gradually reduced, the more the oil vapor is generated, the higher the pressure in the oil tank is, the greater the pressure in the oil tank is, the oil filling limit valve is required to be opened timely to exhaust, the pressure in the oil tank is eliminated, and the potential safety hazard is reduced. The main factors influencing whether the oil filling metering valve can be opened in time are as follows: (1) the gravity, buoyancy and the spring force of the valve core floater are balanced; (2) the internal pressure of the oil tank; (3) the size of the vent hole.
The analysis is performed by using a pressure calculation formula F (pressure) = P (pressure) × S (area): (1) f (pressure): the balance values of the gravity, the buoyancy and the spring force of the valve core floater are usually set as invariables; (2) p (pressure): the fuel oil is evaporated to generate steam, the volume of the oil tank is constant, and the pressure is increased; (3) s (area): size of the vent hole. The pressure for opening the valve is constant, the larger the vent S is, the smaller the pressure P in the oil tank is; and the smaller the vent S, the greater the pressure P inside the tank.
The actual conditions in use are as follows: in order to exhaust gas in time in the refueling process, the vent hole S needs to be larger and better; for safety, the valve is required to be opened in time when the pressure P inside the tank is high, i.e. the larger P is, the better P is. One situation occurs, both P and S are very demanding, and how to achieve that when P is large, the valve can be opened in time to exhaust. At present, most of the design of the refueling metering valve on the market only has one-level opening capacity, after the refueling metering valve is closed, the main exhaust of the system can only pass through the rollover valve, the refueling metering valve can not be opened under the condition of high pressure, the pressure in the oil tank system is always high, and if the vehicle needs to be refueled again, the vehicle can only be statically placed to wait for the slow pressure reduction in the oil tank of the rollover valve. Therefore, in order to solve the technical problem, the utility model provides a high performance refuels limit valve.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome the defects, the utility model aims to provide a high-performance oil filling limit valve which has reasonable structural design, realizes quick opening and pressure reduction under the condition of high pressure through a two-stage opening mode of the valve, and improves the safety of an oil tank and a vehicle system; by adopting a double-wall structure, the liquid dynamic leakage is zero under the dynamic condition; different closing heights are realized through modular design, diversified requirements are met, and the application prospect is wide.
The technical scheme is as follows: a high-performance oil filling limit valve comprises a shell, a float assembly and a bottom cover, wherein the shell is sleeved outside the float assembly, and the bottom cover is arranged at the bottom of the shell and is in contact with the bottom of the float assembly through a spring; the float assembly comprises a float shell, a sealing door and a float, the sealing door is assembled at the upper part of the float and is arranged in the float shell together with the float, the spring is installed between the bottom of the float and a bottom cover, and the float can move up and down in the float shell; a secondary opening vent hole is formed in the center of the upper end face of the floater shell, a primary opening vent hole is formed in the center of the sealing door, the aperture of the primary opening vent hole is smaller than that of the secondary opening vent hole, a primary opening plunger piston matched with the primary opening vent hole is arranged in the center of the upper portion of the floater, and the diameter of the primary opening plunger piston is smaller than that of the primary opening vent hole and larger than that of the secondary opening vent hole; the upper part of the shell is provided with an oil hole, and the bottom of the bottom cover is provided with a fine hole.
The double-wall high-performance oil filling limit valve is reasonable in structural design, adopts a two-stage opening mode that the first-stage opening vent hole is matched with the second-stage opening vent hole, realizes the capability of quickly opening and reducing pressure under the condition of high pressure, can exhaust in time, eliminates the pressure in an oil tank, reduces hidden dangers, improves the safety of the oil tank and a vehicle system, and provides the function of refueling again.
In addition, the oil hole has been seted up on shell upper portion, and at the refueling in-process, along with fluid rises gradually, when fluid arrived oil hole department and closed the window promptly, fluid flows into in the shell rapidly through the oil hole of shell, and the float is after fluid gets into, under the effect of buoyancy, rises rapidly, and the air vent is closed to the sealing door. Therefore, different closing heights can be realized only by replacing shells with different oil hole heights, different liquid level closing heights can be realized, other parts do not need to be adjusted, and the modularized design meets diversified requirements of customers. Along with the use of the oil, the liquid level of the oil descends, and the oil entering the inner part of the shell flows out from the pores of the bottom cover.
The working process is as follows: (1) refueling: during refueling, along with rising of oil in the oil tank, when the oil reaches the oil hole, the oil flows into the shell through the oil hole of the shell, the floater quickly rises under the action of buoyancy after the oil enters, and drives the sealing door to rise together until the primary opening vent hole and the secondary opening vent hole are in a closed state, and at the moment, refueling is completed; (2) exhausting: the oil in the oil tank is gradually reduced along with the use, the more oil vapor is generated in the oil tank, the higher the pressure in the oil tank is, when the internal pressure of the oil tank system is the same, the smaller the area corresponding to the first-stage opening vent hole is, the larger the area corresponding to the second-stage opening vent hole is, the higher the pressure intensity corresponding to the first-stage opening vent hole is than the pressure intensity corresponding to the second-stage opening vent hole, at the moment, the first-stage opening vent hole is opened, the oil vapor in the oil tank begins to be exhausted outwards through the first-stage opening vent hole, the pressure intensity corresponding to the first-stage opening vent hole in the oil tank begins to be reduced, and the pressure is maintained unchanged; when the pressure corresponding to the first-stage opening vent hole in the oil tank is reduced to the second-stage opening vent hole (when the pressure is corresponding to the first-stage opening vent hole, the second-stage opening vent hole is opened to realize large-flow exhaust, and (3) refueling is carried out, wherein the second-stage opening vent hole is opened to realize large-flow exhaust, the pressure balance of the refueling limit valve is destroyed, and the refueling limit valve returns to a free state to provide a refueling function.
Furthermore, according to the high-performance oil filling limit valve, a double-wall structure is formed between the shell and the float shell, the top of the shell is welded with the upper end face of the float shell, and the bottom of the shell is clamped with the bottom cover.
A double-wall structure is formed between the shell and the floater shell, so that the dynamic leakage of liquid under a dynamic condition is zero.
Furthermore, in the high-performance oil filling limit valve, an O-shaped sealing ring is arranged on the outer side of the top of the upper end face of the float shell.
Through setting up O type sealing washer, improved the sealing performance that the limit valve of refueling was installed on the oil tank.
Furthermore, according to the high-performance oil filling limit valve, the aperture of the first-stage opening vent hole is 3-4mm, the aperture of the second-stage opening vent hole is 11-12mm, and the diameter of the first-stage opening plunger piston is 7-8 mm.
Further, according to the high-performance oil filling limit valve, the aperture of the first-stage opening vent hole is 3.5mm, the aperture of the second-stage opening vent hole is 11.2mm, and the diameter of the first-stage opening plunger piston is 7.5 mm.
Furthermore, according to the high-performance oil filling limit valve, the sealing gasket matched with the primary opening vent hole is arranged on the upper end face of the sealing door, and the diameter of the sealing gasket is 11-12 mm.
Further, in the high-performance oil filling limit valve, the diameter of the sealing gasket is 11.8 mm.
Furthermore, according to the high-performance oil filling limit valve, the floater comprises an upper floater and a lower floater, the upper floater and the lower floater are arranged from top to bottom and welded together, and the spring is installed between the bottom of the lower floater and the bottom cover.
The utility model has the advantages that:
(1) the high-performance refueling limit valve adopts a two-stage opening mode that the first-stage opening vent hole is matched with the second-stage opening vent hole, realizes the capability of quickly opening and reducing pressure under the condition of high pressure, can exhaust in time, eliminates the pressure in the oil tank, reduces hidden dangers, improves the safety of the oil tank and a vehicle system, and provides a secondary refueling function;
(2) the high-performance oiling limit valve can realize different closing heights only by replacing the shells with different oil hole heights, so that different liquid level closing heights can be realized, other parts are not required to be adjusted, and the modularized design meets the diversified requirements of customers;
(3) high performance refuels limit valve, form double-walled structure between shell and the float shell, realized that liquid developments are revealed to be zero under the dynamic condition.
Drawings
Fig. 1 is a schematic structural view of the high-performance oil filling limit valve of the present invention;
FIG. 2 is an assembly view of the high performance refueling limit valve of the present invention;
FIG. 3 is a schematic structural view of a float housing of the high-performance fueling limit valve of the present invention;
FIG. 4 is a schematic structural view of a sealing door of the high-performance fueling limit valve of the present invention;
FIG. 5 is a schematic diagram of a float structure of the high performance fueling limit valve of the present invention;
fig. 6 is a schematic structural diagram of the high-performance fueling limit valve of the present invention in a closed state;
fig. 7 is a schematic structural view of the high-performance fueling limit valve of the present invention in a one-stage open state;
fig. 8 is a schematic structural view of the high-performance fueling limit valve of the present invention in a two-stage open state;
fig. 9 is a detailed dimension diagram corresponding to the first-stage opening vent hole of the high-performance fueling limit valve of the present invention;
fig. 10 is a detailed dimension diagram corresponding to the one-stage opening sealing plunger of the high-performance refueling metering valve of the present invention;
fig. 11 is a detailed dimension diagram corresponding to the second-stage opening vent hole of the high-performance fueling limit valve of the present invention;
fig. 12 is a specific size diagram corresponding to the sealing gasket of the high-performance refueling metering valve of the present invention;
fig. 13 is a sectional view of the sealing gasket structure of the high-performance fueling limit valve of the present invention;
fig. 14 is a sectional view of a partial structure of a float of the high-performance refueling metering valve of the present invention;
FIG. 15 is a schematic diagram of the high performance fuel filling metering valve of the present invention;
in the figure: the float comprises a shell 1, an oil hole 11, a float assembly 2, a float shell 21, an upper end surface 211, a secondary opening vent hole 212, an O-shaped sealing ring 213, a sealing door 22, a primary opening vent hole 221, a sealing gasket 222, a float 23, a primary opening plunger 231, a bottom cover 3, a fine hole 31 and a spring 4.
Detailed Description
The invention will be further elucidated with reference to the accompanying figures 1-15 and the specific embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The high-performance oil filling limit valve with the structure as shown in fig. 1-15 comprises a shell 1, a float assembly 2 and a bottom cover 3, wherein the shell 1 is sleeved outside the float assembly 2, and the bottom cover 3 is arranged at the bottom of the shell 1 and is contacted with the bottom of the float assembly 2 through a spring 4; the float assembly 2 comprises a float shell 21, a sealing door 22 and a float 23, wherein the sealing door 22 is assembled at the upper part of the float 23 and is arranged inside the float shell 21 together with the float 23, the spring 4 is arranged between the bottom of the float 23 and the bottom cover 3, and the float 23 can move up and down in the float shell 21; a secondary opening vent hole 212 is formed in the center of the upper end surface 211 of the float shell 21, a primary opening vent hole 221 is formed in the center of the sealing door 22, the aperture of the primary opening vent hole 221 is smaller than that of the secondary opening vent hole 212, a primary opening plunger 231 matched with the primary opening vent hole 221 is arranged in the center of the upper portion of the float 23, and the diameter of the primary opening plunger is smaller than that of the primary opening vent hole 221 and larger than that of the secondary opening vent hole 212; the upper part of the shell 1 is provided with an oil hole 11, and the bottom of the bottom cover 3 is provided with a pore 31.
Further, a double-wall structure is formed between the shell 1 and the float shell 21, the top of the shell 1 is welded to the upper end face 211 of the float shell 21, and the bottom of the shell 1 is clamped to the bottom cover 3.
Further, an O-ring 213 is provided on the top outer side of the upper end surface 211 of the float housing 21.
Further, the aperture of the first-stage opening vent 221 is 3-4mm, the aperture of the second-stage opening vent 212 is 11-12mm, and the diameter of the first-stage opening plunger 231 is 7-8 mm.
Further, the aperture of the first-stage opening vent 221 is 3.5mm, the aperture of the second-stage opening vent 212 is 11.2mm, and the diameter of the first-stage opening plunger 231 is 7.5 mm.
Further, a sealing gasket 222 matched with the first-stage opening vent hole 221 is arranged on the upper end face of the sealing door 22, and the diameter of the sealing gasket 222 is 11-12 mm.
Further, the diameter of the sealing gasket 222 is 11.8 mm.
Further, the float 23 comprises an upper float 232 and a lower float 233, the upper float 232 and the lower float 233 are arranged from top to bottom and welded together, and the spring 4 is installed between the bottom of the lower float 233 and the bottom cover 3.
Examples
Based on the above structure, as shown in FIGS. 1 to 15.
The double-wall high-performance refueling limit valve is reasonable in structural design, and adopts a two-stage opening mode that the first-stage opening vent hole 221 is matched with the second-stage opening vent hole 212, so that the capability of quickly opening and reducing pressure under the condition of high pressure of the refueling limit valve is realized, the gas can be exhausted in time, the pressure in the oil tank is eliminated, the hidden danger is reduced, the safety of the oil tank and a vehicle system is improved, and the function of refueling again is provided.
In addition, the upper portion of the shell 1 is provided with an oil hole 11, in the process of refueling, along with the gradual rising of oil, when oil reaches the oil hole 11, namely, a window is closed, the oil rapidly flows into the shell 1 through the oil hole of the shell 1, the floater 23 rapidly rises under the action of buoyancy after the oil enters, and the air vent is closed by the sealing door 22. Therefore, the invention can realize different closing heights only by replacing the shells 1 with different heights of the oil liquid holes 11, can realize different liquid level closing heights, does not need to adjust other components, and meets the diversified requirements of customers by modular design. As the oil is used, the oil level drops, and the oil introduced into the housing 1 flows out through the pores 31 of the bottom cover 3.
The working process is as follows:
(1) refueling: in the process of refueling, along with the rising of oil in the oil tank, when the oil reaches the oil hole 11, the oil flows into the shell 1 through the oil hole 11 of the shell 1, the float 33 quickly rises under the action of buoyancy after the oil enters, and drives the sealing door 32 to rise together until the primary opening vent hole 221 and the secondary opening vent hole 212 are in a closed state, and at the moment, refueling is completed;
(2) exhausting: the oil in the oil tank is gradually reduced along with the use, the more oil vapor is generated in the oil tank, the higher the pressure in the oil tank is, when the internal pressure of the oil tank system is the same, the smaller the area corresponding to the first-stage opening vent hole 221, the larger the area corresponding to the second-stage opening vent hole 212, the higher the pressure corresponding to the first-stage opening vent hole 221 is than the pressure corresponding to the second-stage opening vent hole 212, at the moment, the first-stage opening vent hole 221 is opened, the oil vapor in the oil tank begins to exhaust outwards through the first-stage opening vent hole 221, the lower the pressure corresponding to the first-stage opening vent hole 221 in the oil tank begins to reduce, and the pressure is kept unchanged; when the pressure corresponding to the first-stage opening vent hole 221 in the oil tank is reduced to the pressure corresponding to the second-stage opening vent hole 212, the second-stage opening vent hole 212 is opened, and large-flow exhaust is achieved;
(3) refueling again: the secondary opening vent hole 212 is opened, after large-flow exhaust is realized, the pressure balance of the refueling metering valve is damaged, and the refueling metering valve returns to a free state, so that the function of refueling is provided.
Furthermore, a double-wall structure is formed between the shell 1 and the float shell 21, so that the dynamic leakage of liquid under a dynamic condition is zero. By arranging the O-shaped sealing ring 213, the sealing performance of the oiling limit valve on the oil tank is improved.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, the embodiments of the present invention can be arbitrarily combined with each other, and the same shall be regarded as the disclosure of the present invention as long as the idea of the present invention is not violated.
Claims (8)
1. The high-performance oil filling limit valve is characterized by comprising a shell (1), a float assembly (2) and a bottom cover (3), wherein the shell (1) is sleeved outside the float assembly (2), and the bottom cover (3) is arranged at the bottom of the shell (1) and is in contact with the bottom of the float assembly (2) through a spring (4); the float assembly (2) comprises a float shell (21), a sealing door (22) and a float (23), wherein the sealing door (22) is assembled at the upper part of the float (23) and is arranged inside the float shell (21) together with the float (23), the spring (4) is installed between the bottom of the float (23) and the bottom cover (3), and the float (23) can move up and down in the float shell (21); a secondary opening vent hole (212) is formed in the center of the upper end face (211) of the floater shell (21), a primary opening vent hole (221) is formed in the center of the sealing door (22), the aperture of the primary opening vent hole (221) is smaller than that of the secondary opening vent hole (212), a primary opening plunger (231) matched with the primary opening vent hole (221) is arranged in the center of the upper portion of the floater (23), and the diameter of the primary opening plunger is smaller than that of the primary opening vent hole (221) and larger than that of the secondary opening vent hole (212); the upper part of the shell (1) is provided with an oil hole (11), and the bottom of the bottom cover (3) is provided with a fine hole (31).
2. The high-performance oil filling limit valve according to claim 1, characterized in that a double-wall structure is formed between the outer shell (1) and the float outer shell (21), the top of the outer shell (1) is welded with the upper end surface (211) of the float outer shell (21), and the bottom of the outer shell (1) is clamped with the bottom cover (3).
3. The high performance fuel filling limit valve according to claim 1, wherein an O-ring (213) is provided outside the top of the upper end surface (211) of the float housing (21).
4. The high performance fueling limit valve of claim 1, wherein the primary opening vent (221) has a bore diameter of 3-4mm, the secondary opening vent (212) has a bore diameter of 11-12mm, and the primary opening sealing plunger (231) has a diameter of 7-8 mm.
5. The high performance refueling metering valve as recited in claim 4 wherein the primary opening vent (221) has a 3.5mm bore diameter, the secondary opening vent (212) has a 11.2mm bore diameter, and the primary opening sealing plunger (231) has a 7.5mm diameter.
6. The high-performance oil filling limit valve according to claim 5, characterized in that the upper end surface of the sealing door (22) is provided with a sealing gasket (222) matched with the primary opening vent hole (221), and the diameter of the sealing gasket (222) is 11-12 mm.
7. The high performance refueling metering valve as recited in claim 6 wherein the gasket (222) has a diameter of 11.8 mm.
8. The high-performance oil filling limit valve according to claim 1, wherein the float (23) comprises an upper float (232) and a lower float (233), the upper float (232) and the lower float (233) are arranged from top to bottom and welded together, and the spring (4) is installed between the bottom of the lower float (233) and the bottom cover (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023122941.2U CN214425118U (en) | 2020-12-17 | 2020-12-17 | High-performance oil filling limit valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023122941.2U CN214425118U (en) | 2020-12-17 | 2020-12-17 | High-performance oil filling limit valve |
Publications (1)
| Publication Number | Publication Date |
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| CN214425118U true CN214425118U (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023122941.2U Active CN214425118U (en) | 2020-12-17 | 2020-12-17 | High-performance oil filling limit valve |
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| CN (1) | CN214425118U (en) |
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2020
- 2020-12-17 CN CN202023122941.2U patent/CN214425118U/en active Active
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