CN112628409B - A double-wall high-performance refueling limit valve and its working method - Google Patents
A double-wall high-performance refueling limit valve and its working method Download PDFInfo
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- CN112628409B CN112628409B CN202011490701.XA CN202011490701A CN112628409B CN 112628409 B CN112628409 B CN 112628409B CN 202011490701 A CN202011490701 A CN 202011490701A CN 112628409 B CN112628409 B CN 112628409B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 230000007423 decrease Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 12
- 230000009977 dual effect Effects 0.000 description 10
- 239000000446 fuel Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/077—Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
- F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
- F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
- F16K31/20—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K33/00—Floats for actuation of valves or other apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03256—Fuel tanks characterised by special valves, the mounting thereof
- B60K2015/03296—Pressure regulating valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
- B60K2015/03375—Arrangements or special measures related to fuel tanks or fuel handling to improve security
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/077—Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation
- B60K2015/0775—Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation for reducing movement or slash noise of fuel
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Float Valves (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The double-wall high-performance refueling limit valve comprises a shell, a float assembly and a bottom cover, wherein the shell is sleeved outside the float assembly, the bottom cover is arranged at the bottom of the shell and is contacted 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 arranged between the bottom of the float and the bottom cover, the float can move up and down in the float shell, and a secondary opening vent hole is formed in the center of the upper end face of the float shell. The double-wall high-performance refueling limit valve and the working method thereof realize quick opening and depressurization under the condition of high pressure through a valve two-stage opening mode, improve the safety of an oil tank and a vehicle system, realize zero dynamic leakage of liquid under the dynamic condition by adopting a double-wall structure, realize different closing heights by adopting a modularized design, and meet diversified requirements.
Description
Technical Field
The invention relates to the technical field of automobile fuel management systems, in particular to a double-wall high-performance refueling limit valve and a working method thereof.
Background
The fuel limit valve is an important part of the automobile fuel management system, and directly determines the total volume of the fuel when the fuel limit valve is refueled, and simultaneously, the valve is required to be opened in time to increase the exhaust as the fuel consumption is gradually reduced. It is well known that the more liquid in a finite container, the less sloshing of the liquid during movement of the container, and the less sloshing of the liquid, the more greatly. In the case of an automobile fuel tank, larger fuel sloshing means more fuel vapor is generated and needs to be discharged, so that the expansion deformation of the fuel tank is avoided, and meanwhile, a great hidden danger is brought to safety.
Along with the gradual reduction of the use of fuel in the oil tank, the more the oil vapor is generated, the greater the pressure in the oil tank, the more the oil-filling limiting valve is required to be opened timely for exhausting, the pressure in the oil tank is eliminated, and the potential safety hazard is reduced. The main factors influencing whether the oil filling limiting valve can be opened in time include (1) the balance value of the gravity, buoyancy and the float spring force of the valve core float, (2) the internal pressure of the oil tank and (3) the size of the ventilation hole.
The pressure calculation formula F (pressure) =P (pressure) ×S (area) is used for analyzing (1) the balance value of F (pressure): the gravity, buoyancy and float spring force of the valve core float, is usually set as invariable, (2) P (pressure): the fuel is evaporated to generate steam, the volume of the fuel tank is invariable, the pressure is increased, and (3) S (area): the size of the vent hole. From the above, the pressure at which the valve opens is constant, the larger the vent hole S, the smaller the tank internal pressure P, and the smaller the vent hole S, the larger the tank internal pressure P.
The situation in actual application is that the larger and the better the vent hole S is needed for timely exhausting in the refueling process, and the larger and the better the P is, the valve can be timely opened when the pressure P in the oil tank is needed to be larger for safety. A situation arises where both P and S are very demanding and how to achieve that when P is large, the valve can be opened in time to allow venting. At present, most of the designs of the oil filling limiting valves on the market have one-level opening capability, when the oil filling limiting valves are closed, main exhaust of the system can only pass through the car dumper valve, the oil filling limiting valves can not be opened under the condition of high pressure, the pressure in the oil tank system is always high, and if the vehicle is filled again, the vehicle can only stand and wait for the car dumper valve to slowly reduce the pressure in the oil tank. Therefore, in order to solve the technical problems, the invention provides the double-wall high-performance oiling limit valve.
Disclosure of Invention
The invention aims to overcome the defects, and the invention aims to provide the double-wall high-performance refueling limit valve and the working method thereof, which have reasonable structural design and simple working method, realize quick opening and depressurization under the condition of high pressure through a valve two-stage opening mode and improve the safety of an oil tank and a vehicle system; the double-wall structure is adopted, so that the dynamic leakage of liquid is zero under the dynamic condition, different closing heights are realized through the modularized design, the diversified requirements are met, and the application prospect is wide.
The technical scheme is that the double-wall high-performance refueling limit valve comprises a shell, a float assembly and a bottom cover, wherein the shell is sleeved outside the float assembly, the bottom cover is arranged at the bottom of the shell and is contacted 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 inside the float shell together with the float, the spring is arranged between the bottom of the float and the bottom cover, 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 float 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 the aperture of the secondary opening vent hole, a primary opening plunger matched with the primary opening vent hole is arranged in the center of the upper part of the float, the diameter of the primary opening plunger is larger than the aperture of the primary opening vent hole and smaller than the aperture of the secondary opening vent hole, an oil hole is formed in the upper part of the shell, and a pore is formed in the bottom of the bottom cover.
The double-wall high-performance refueling limit valve is reasonable in structural design, adopts a two-stage opening mode of matching the first-stage opening vent hole with the second-stage opening vent hole, realizes the capability of rapidly opening and reducing pressure of the refueling limit valve under the high pressure condition, can timely exhaust gas, eliminates the pressure in the oil tank, reduces hidden danger, improves the safety of the oil tank and a vehicle system, and simultaneously provides a refueling function.
In addition, the oil hole has been seted up on shell upper portion, and in the oiling process, along with fluid rises gradually, and when the oil reached oil hole department, the window was closed promptly to the oil, and the oil flows into in the shell through the oil hole of shell rapidly, and the float is after the oil gets into, and under the effect of buoyancy, rises rapidly, and the sealing door closes the air vent. Therefore, the invention can realize different closing heights by only replacing the shells with different oil hole heights, and can realize different liquid level closing heights without adjusting other parts, and the modularized design meets the diversified demands of customers. With the use of the oil, the liquid level of the oil drops, and the oil entering the shell flows out of the pores of the bottom cover.
Furthermore, the double-wall high-performance refueling limit valve is characterized in that 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.
The shell and the float shell form a double-wall structure, so that the dynamic leakage of liquid is zero under the dynamic condition.
Furthermore, in the double-wall high-performance refueling 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.
By arranging the O-shaped sealing ring, the sealing performance of the oil filling limiting valve arranged on the oil tank is improved.
Furthermore, in the double-wall high-performance oiling 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 seal plunger is 7-8mm.
Further, in the double-wall high-performance oiling 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 seal plunger is 7.5mm.
Furthermore, in the double-wall high-performance refueling limit valve, the upper end face of the sealing door is provided with a sealing gasket matched with the first-stage opening vent hole, and the diameter of the sealing gasket is 11-12mm.
Further, in the double-wall high-performance refueling limit valve, the diameter of the sealing gasket is 11.8mm.
Further, the double-wall high-performance refueling limit valve comprises an upper floater and a lower floater, wherein the upper floater and the lower floater are arranged from top to bottom and welded together, and the spring is arranged between the bottom of the lower floater and the bottom cover.
The invention also relates to a working method of the double-wall high-performance oiling limit valve, which comprises the following steps:
(1) During oiling, along with the rising of the 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 float rises rapidly under the action of buoyancy after the oil enters, and drives the sealing door to rise together until the first-stage opening vent hole and the second-stage opening vent hole are in a closed state, and at the moment, oiling is completed;
(2) The oil in the oil tank gradually reduces along with the use, the more oil vapor in the oil tank is generated, the larger the pressure in the oil tank is, under the condition that the internal pressure of the oil tank system is the same, the corresponding area of the primary opening vent hole is small, the corresponding area of the secondary opening vent hole is large, the corresponding pressure of the primary opening vent hole is higher than the corresponding pressure of the secondary opening vent hole, at the moment, the primary opening vent hole is opened, the oil vapor in the oil tank starts to exhaust outwards through the primary opening vent hole, the corresponding pressure of the primary opening vent hole in the oil tank starts to reduce, and the pressure is kept unchanged;
(3) And (3) refueling again, namely opening a secondary opening vent hole, and after high-flow exhaust is realized, destroying the pressure balance of the refueling limiting valve, and returning the refueling limiting valve to the original free state so as to provide a refueling function.
The beneficial effects of the invention are as follows:
(1) According to the double-wall high-performance refueling limit valve, a two-stage opening mode of matching the first-stage opening vent hole with the second-stage opening vent hole is adopted, so that the capability of rapidly opening and reducing pressure of the refueling limit valve under the condition of high pressure is realized, the gas can be timely discharged, the pressure in a fuel tank is eliminated, hidden danger is reduced, the safety of the fuel tank and a vehicle system is improved, and a refueling function is provided;
(2) According to the double-wall high-performance oiling limit valve, 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 are not required to be adjusted, and the modularized design meets the diversified demands of customers;
(3) According to the double-wall high-performance refueling limit valve, a double-wall structure is formed between the shell and the float shell, so that the dynamic leakage of liquid is zero under the dynamic condition;
(4) The working method of the double-wall high-performance oiling limit valve has reasonable design, convenient operation and wide application prospect.
Drawings
FIG. 1 is a schematic diagram of a dual wall high performance fueling limiting valve of the present invention;
FIG. 2 is a schematic illustration of an assembly of a dual wall high performance fueling limiting valve of the present invention;
FIG. 3 is a schematic diagram of the float housing of the dual wall high performance fueling limiting valve of the present invention;
FIG. 4 is a schematic diagram of the sealing door structure of the double-wall high-performance fueling limiting valve of the present invention;
FIG. 5 is a schematic diagram of the float structure of the double wall high performance fueling limiting valve of the present invention;
FIG. 6 is a schematic illustration of the structure of the dual wall high performance fueling limiting valve of the present invention in a closed position;
FIG. 7 is a schematic view of a double wall high performance fueling limiting valve of the present invention in a first stage open configuration;
FIG. 8 is a schematic view of a double wall high performance fueling limiting valve of the present invention in a two-stage open configuration;
FIG. 9 is a specific dimensional view of a primary opening vent of the dual wall high performance fueling limiting valve of the present invention;
FIG. 10 is a specific dimensional view of a primary unsealing plunger of the double-wall high-performance fueling limiting valve of the present invention;
FIG. 11 is a specific dimensional view corresponding to a secondary opening vent of the dual wall high performance fueling limiting valve of the present invention;
FIG. 12 is a specific dimensional view of a gasket for a dual wall high performance fueling limiting valve of the present invention;
FIG. 13 is a cross-sectional view of a gasket construction of the dual wall high performance refuel limiting valve of the present invention;
FIG. 14 is a partial cross-sectional view of the float of the dual wall high performance refuel limiting valve of the present invention;
FIG. 15 is a schematic diagram of a dual wall high performance fueling limiting valve of the present invention;
in the figure, 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, an upper float 232, a lower float 233, a bottom cover 3, a fine hole 31 and a spring 4 are shown.
Detailed Description
The invention will be further elucidated with reference to the figures 1-15 and the specific examples.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The double-wall high-performance refueling limit valve with the structure shown in figures 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, the bottom cover 3 is installed 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, 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, 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 the aperture 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 part of the float 23, the diameter of the primary opening plunger is larger than the aperture of the primary opening vent hole and smaller than the aperture of the secondary opening vent hole 212, and the bottom cover 31 is formed in the bottom cover 1 is provided with the bottom cover 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 with the upper end surface 211 of the float shell 21, and the bottom of the shell 1 is clamped with the bottom cover 3.
Further, an O-ring 213 is disposed on the outer side of the top of the upper end surface 211 of the float housing 21.
Further, the aperture of the primary opening vent hole 221 is 3-4mm, the aperture of the secondary opening vent hole 212 is 11-12mm, and the diameter of the primary opening plunger 231 is 7-8mm.
Further, the diameter of the primary opening vent hole 221 is 3.5mm, the diameter of the secondary opening vent hole 212 is 11.2mm, and the diameter of the primary opening plunger 231 is 7.5mm.
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 11-12mm.
Further, the diameter of the gasket 222 is 11.8mm.
Further, the floats 23 include upper and lower floats 232, 233, the upper and lower floats 232, 233 are disposed 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 structural foundation, as shown in fig. 1-15, the working method of the double-wall high-performance oiling limit valve comprises the following steps:
(1) During the oiling process, along with the rising of the 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 rises rapidly under the action of buoyancy after the oil enters, and drives the sealing door 22 to rise together until the first-stage opening vent hole 221 and the second-stage opening vent hole 212 are in a closed state, and at the moment, the oiling is completed;
(2) The exhaust is that the oil in the oil tank gradually decreases with the use, the more oil vapor in the oil tank is generated, the higher the pressure in the oil tank is, when the internal pressure of the oil tank system is the same, the corresponding area of the primary opening vent hole 221 is small, the corresponding area of the secondary opening vent hole 212 is large, the corresponding pressure of the primary opening vent hole 221 is higher than the corresponding pressure of the secondary opening vent hole 212, at the moment, the primary opening vent hole 221 is opened, the oil vapor in the oil tank starts to exhaust outwards through the primary opening vent hole 221, the corresponding pressure of the primary opening vent hole 221 in the oil tank starts to decrease, and the pressure is kept unchanged;
(3) And (3) refueling again, namely opening the secondary opening vent hole 212, and after high-flow exhaust is realized, destroying the pressure balance of the refueling limiting valve, and returning the refueling limiting valve to the original free state so as to provide a refueling function.
By the adoption of the two-wall high-performance refueling limit valve, the structural design is reasonable, the two-stage opening mode of matching the first-stage opening vent hole 221 and the second-stage opening vent hole 212 is adopted, the capability of rapidly opening and reducing pressure of the refueling limit valve under the condition of high pressure is realized, the gas can be timely discharged, the pressure in the oil tank is eliminated, hidden danger is reduced, the safety of the oil tank and a vehicle system is improved, and the refueling function is provided.
In addition, the upper portion of the housing 1 is provided with the oil hole 11, in the oiling process, along with the gradual rising of the oil, when the oil reaches the oil hole 11, that is, the window is closed, the oil rapidly flows into the housing 1 through the oil hole of the housing 1, the float 23 rapidly rises under the action of buoyancy after the oil enters, and the sealing door 22 closes the vent. Therefore, the invention can realize different closing heights by only replacing the shell 1 with different heights of the oil holes 11, and can realize different liquid level closing heights without adjusting other parts, and the modular design meets the diversified demands of customers. As the oil is used, the oil level drops, and the oil entering the inside of the casing 1 flows out from the pores 31 of the bottom cover 3.
Furthermore, a double-wall structure is formed between the shell 1 and the float shell 21, so that the dynamic leakage of liquid is zero under the dynamic condition. By arranging the O-shaped sealing ring 213, the sealing performance of the oil filling limit valve arranged on the oil tank is improved.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Furthermore, any combination of the embodiments of the present invention is possible, and should be regarded as the disclosure of the present invention as long as it does not depart from the gist of the present invention.
Claims (7)
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| CN202011490701.XA CN112628409B (en) | 2020-12-17 | 2020-12-17 | A double-wall high-performance refueling limit valve and its working method |
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| CN202011490701.XA CN112628409B (en) | 2020-12-17 | 2020-12-17 | A double-wall high-performance refueling limit valve and its working method |
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| CN112628409A CN112628409A (en) | 2021-04-09 |
| CN112628409B true CN112628409B (en) | 2024-12-20 |
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| CN114771239A (en) * | 2022-04-02 | 2022-07-22 | 斯丹德汽车系统（苏州）有限公司 | Fuel oil liquid level valve with separated float structure and working mode thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214425118U (en) * | 2020-12-17 | 2021-10-19 | 斯丹德汽车系统（苏州）有限公司 | High-performance oil filling limit valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4356185B2 (en) * | 2000-03-30 | 2009-11-04 | Ｎｏｋ株式会社 | Liquid shut-off valve device |
| CN209762367U (en) * | 2019-04-28 | 2019-12-10 | 瑞福汽车控制系统(上海)有限公司 | refueling limited exhaust valve capable of being opened in single-float and single-stage mode |
| CN210770314U (en) * | 2019-10-24 | 2020-06-16 | 杨玉明 | Three-hole anti-hammer air valve |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214425118U (en) * | 2020-12-17 | 2021-10-19 | 斯丹德汽车系统（苏州）有限公司 | High-performance oil filling limit valve |
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| CN112628409A (en) | 2021-04-09 |
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