CN211592239U - Novel ORVR steam recovery oil pipe assembly - Google Patents
Novel ORVR steam recovery oil pipe assembly Download PDFInfo
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- CN211592239U CN211592239U CN201922148776.9U CN201922148776U CN211592239U CN 211592239 U CN211592239 U CN 211592239U CN 201922148776 U CN201922148776 U CN 201922148776U CN 211592239 U CN211592239 U CN 211592239U
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Abstract
The utility model discloses a novel ORVR vapor recovery oil pipe assembly, including the fuel tank, the intercommunication has metal to add oil pipe and breather pipe on the fuel tank, the import department that metal adds the oil pipe is provided with the oil catch tray, is provided with the throat of refueling in the inner chamber that the metal adds the oil pipe, the breather pipe exit is provided with air cleaner, still includes: and one end of the circulating pipe is communicated with the fuel tank, and the other end of the circulating pipe is communicated with the inlet end of the metal oil filling pipe, and the circulating pipe is used for balancing the fuel oil vapor pressure in the fuel tank during refueling. The utility model discloses an add the circulating pipe to the rational design adds space angle, trend, pipe diameter, the length isoparametric of oil pipe, makes the steam pressure in the fuel tank reasonable and controlled all the time in refueling process, presents the state of a stable liquid seal to guarantee that oil, vapour flow according to the design direction in the pipeline, can enough realize the purpose of refueling smoothly, can prevent again that fuel steam discharge from exceeding standard.
Description
Technical Field
The utility model belongs to the technical field of the car technique of refueling and specifically relates to a novel ORVR vapor recovery oil pipe assembly is related to.
Background
An ORVR (on board Refueling Vapor Recovery) vehicle Refueling Vapor Recovery system is a vehicle emission control system which can collect fuel Vapor volatilized in a fuel tank during Refueling. Specifically, the fuel tank is simultaneously provided with a filling pipe and a vent pipe, and during filling, when the internal pressure in the fuel tank is increased, fuel vapor can release pressure to the outside through the vent pipe. Meanwhile, in order to clean the fresh air flowing to the carbon tank in the running process of the engine and prevent dust in the air from entering the carbon tank and the engine, an air filter is additionally arranged at the outlet of the breather pipe. However, when the ORVR system with the above structure is used for a simulated fueling experiment, it is found that the fuel vapor pressure in the fueling pipe is very unstable, and adverse phenomena such as unsmooth fueling, escape of fuel vapor from the fueling port, and even direct ejection of liquid fuel from the fueling port often occur, so that the influence of the fuel vapor on the environment cannot be eliminated, and the normal fueling operation is influenced.
Disclosure of Invention
In order to solve the problem, the utility model provides a novel simple structure, stable ORVR steam recovery oil pipe system of liquid seal specifically takes following technical scheme:
novel ORVR vapor recovery oil pipe assembly, including the fuel tank, the intercommunication has metal to add oil pipe and breather pipe on the fuel tank, the import department that the metal added the oil pipe is provided with the oil catch tray, is provided with the throat of refueling in the inner chamber that the metal added the oil pipe, the breather pipe exit is provided with air cleaner, still includes:
and one end of the circulating pipe is communicated with the fuel tank, and the other end of the circulating pipe is communicated with the inlet end of the metal oil filling pipe, and the circulating pipe is used for balancing the fuel oil vapor pressure in the fuel tank during refueling.
Preferably, the inner diameter of the circulation tube is 4-6mm, and the inner diameter of the metal filler tube is 25-26 mm;
the metal oil filling pipe comprises a throat pipe section, a first section, a second section and a third section which are arranged from top to bottom; the choke section is used for accommodating a coaxially arranged refueling choke, the included angle between the central axis of the refueling choke and the vertical line is 55-60 degrees, and the vertical height from the lower edge of the refueling choke to the top surface of the fuel tank is 300-500 mm; the length of the first section is 155 +/-10 mm, and the included angle between the central axis of the first section and the plumb line is 53 +/-3 degrees; the length of the second section is 135 +/-10 mm, and the included angle between the central axis of the second section and the plumb line is 80 +/-3 degrees; the length of the third section is 120 +/-10 mm, and the included angle between the central axis of the third section and the plumb line is 6 +/-2 degrees; the throat pipe section, the first section, the second section and the third section are all connected through R80 +/-10 mm elbows;
when oiling is started, the oil-gas mixing rate in the metal oiling pipe is zero; after 4-5 seconds, the oil-gas mixing rate in the metal oil filling pipe is kept at 94-95%.
Further, the inner diameter of the metal oil filling pipe is 25.4mm, and the inner diameter of the circulating pipe is 4.95 mm;
the included angle between the central axis of the refueling throat pipe and the plumb line is 60 degrees, and the vertical height of the tail end of the oil inlet pipe extending into the fuel tank from the lower edge of the refueling throat pipe is 325 mm.
The metal oil filling pipe and the circulating pipe are communicated with the fuel tank through rubber pipes.
The air filter is communicated with the vent pipe through a rubber pipe.
And a sealing ring is arranged between the oil filling throat pipe and the metal oil filling pipe.
The utility model provides a novel ORVR vapor recovery oil pipe assembly is through addding the circulating pipe to rational design adds the space angle, trend, pipe diameter, length isoparametric of oil pipe, makes the steam pressure in the fuel tank reasonable and controlled all the time in refueling process, presents the state of a stable liquid seal, thereby guarantees that oil, vapour flow according to the design direction in the pipeline, can enough realize the purpose of refueling smoothly, can prevent again that fuel steam from discharging and exceed standard.
Drawings
Fig. 1a, 1b and 1c are schematic structural diagrams (fuel tank is omitted) of the present invention.
FIG. 2 is a cross-sectional view (metal filler tube inlet portion) of FIG. 1 a.
FIG. 3 is a graphical illustration of the air-fuel mixture ratio in the metal filler pipe at 4.93 seconds of refueling.
Fig. 4 is a graph of fuel vapor pressure in a metal filler tube versus time during refueling.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the embodiments are given in detail in this embodiment and are implemented on the premise of the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.
As shown in FIGS. 1a, 1b and 1c, the ORVR vapor recovery oil pipe assembly of the present invention comprises a fuel tank 1, a metal filler pipe 2, a vent pipe 3 and a circulating pipe 4, which are connected to the fuel tank 1, wherein the metal filler pipe 2 and the circulating pipe 4 are both connected to the fuel tank 1 through rubber pipes.
The inner diameter of the metal oil filling pipe 2 is 25-26mm, and the metal oil filling pipe comprises a throat pipe section, a first section, a second section and a third section which are arranged from top to bottom. The choke section is used for accommodating a coaxially arranged refueling choke 5 (see figure 2), the included angle between the central axis of the refueling choke 5 and a plumb line is 55-60 degrees, and the vertical height from the lower edge of the refueling choke 5 to the top surface of the fuel tank is 300-500 mm; the length of the first section is 155 +/-10 mm, and the included angle between the central axis of the first section and the plumb line is 53 +/-3 degrees; the length of the second section is 135 +/-10 mm, and the included angle between the central axis of the second section and the plumb line is 80 +/-3 degrees; the length of the third section is 120 +/-10 mm, and the included angle between the central axis of the third section and the plumb line is 6 +/-2 degrees; the throat pipe section, the first section, the second section and the third section are all connected through R80 +/-10 mm elbows; in order to avoid the phenomena of leakage, overflow and water dripping, a sealing ring 6 is additionally arranged between the oil filling throat pipe 5 and the metal oil filling pipe 2; in order to fix the oil-collecting device on the vehicle body, the oil-collecting tray 7 is installed at the inlet of the metal oil-filling pipe 2, and the fixing clip 8 is installed at the middle part of the metal oil-filling pipe 2.
Generally, an air filter 9 is installed at the outlet end of the breather pipe 3, and the air filter is communicated with the breather pipe 3 through a rubber pipe and is used for filtering air flowing to the carbon tank during the operation of the engine so as to prevent dust in the air from entering the carbon tank and the engine.
The circulating pipe 4 is used for balancing the fuel vapor pressure in the fuel tank 1 during refueling, and the head part of the circulating pipe is communicated with the throat pipe section of the metal refueling pipe 2 and corresponds to the outer wall of the refueling throat pipe 5; and when the inner diameter of the metal oil filling pipe is 25-26mm, the inner diameter of the circulating pipe is 4-6 mm.
Preferably, when the metal filler pipe 2 has an inner diameter of 25.4mm, the circulation pipe 4 has an inner diameter of 4.95 mm; and the included angle between the central axis of the refueling throat pipe 5 and the plumb line is 60 degrees, the vertical height of the tail end of the oil inlet pipe extending into the fuel tank 1 from the lower edge of the refueling throat pipe 5 is 325mm, and the space trend and the length of the other three sections of the metal refueling pipe 2 are selected according to the range.
When the fuel tank 1 is refueled by the utility model adopting the above preferred scheme, as shown in fig. 3, the oil-gas mixing rate in the metal fuel filler pipe 2 is rapidly increased from zero; the refueling was carried out for 4.93 seconds and the air-fuel mixture ratio in the metal filler tube 2 reached 95%, at which point it was assumed that an "effective liquid seal" had formed in the metal filler tube 2, and thereafter, the ratio was continuously maintained. From the synchronously monitored pressure-time diagram (see fig. 4), it can be seen that the fuel vapor pressure in the fuel tank 1 reaches a maximum when the filling is carried out for 5 seconds, and then the pressure slowly drops, indicating that a normal flow of gas in the system has been established during the filling process (i.e. an "effective liquid seal" condition is reached). Under this state, the oil gas pressure and the flow process are in a controlled stable state when oil is added, and oil and gas flow in the pipeline according to the designed direction: the fuel can smoothly flow into the fuel tank 1 from the metal oil filling pipe 2, meanwhile, the mixed gas of fuel steam and air flows to the carbon tank under the action of the pressure, after the mixed gas is filtered by the activated carbon in the carbon tank, the gasoline steam is adsorbed, clean air is discharged to the atmosphere through the air pipe 3 and the air filter 9, bad phenomena that the fuel is not smoothly filled, the fuel steam escapes from the oil filling port, even liquid fuel is directly sprayed out from the oil filling port and the like are fully avoided, and the aim of controlling the green emission of the fuel steam is achieved.
Claims (6)
1. The utility model provides a novel ORVR vapor recovery oil pipe assembly, includes the fuel tank, the intercommunication has metal to add oil pipe and breather pipe on the fuel tank, the import department that the metal adds the oil pipe is provided with the oil catch tray, is provided with the choke of refueling in the inner chamber that the metal adds the oil pipe, the breather pipe exit is provided with air cleaner, its characterized in that: further comprising:
and one end of the circulating pipe is communicated with the fuel tank, and the other end of the circulating pipe is communicated with the inlet end of the metal oil filling pipe, and the circulating pipe is used for balancing the fuel oil vapor pressure in the fuel tank during refueling.
2. The novel ORVR steam recovery oil pipe assembly of claim 1, wherein:
the inner diameter of the circulating pipe is 4-6mm, and the inner diameter of the metal oil filling pipe is 25-26 mm;
the metal oil filling pipe comprises a throat pipe section, a first section, a second section and a third section which are arranged from top to bottom; the choke section is used for accommodating a coaxially arranged refueling choke, the included angle between the central axis of the refueling choke and the vertical line is 55-60 degrees, and the vertical height from the lower edge of the refueling choke to the top surface of the fuel tank is 300-500 mm; the length of the first section is 155 +/-10 mm, and the included angle between the central axis of the first section and the plumb line is 53 +/-3 degrees; the length of the second section is 135 +/-10 mm, and the included angle between the central axis of the second section and the plumb line is 80 +/-3 degrees; the length of the third section is 120 +/-10 mm, and the included angle between the central axis of the third section and the plumb line is 6 +/-2 degrees; the throat pipe section, the first section, the second section and the third section are all connected through R80 +/-10 mm elbows;
when oiling is started, the oil-gas mixing rate in the metal oiling pipe is zero; after 4-5 seconds, the oil-gas mixing rate in the metal oil filling pipe is kept at 94-95%.
3. The novel ORVR steam recovery oil pipe assembly of claim 1, wherein:
the inner diameter of the metal oil filling pipe is 25.4mm, and the inner diameter of the circulating pipe is 4.95 mm;
the included angle between the central axis of the refueling throat pipe and the plumb line is 60 degrees, and the vertical height of the tail end of the oil inlet pipe extending into the fuel tank from the lower edge of the refueling throat pipe is 325 mm.
4. The novel ORVR steam recovery oil pipe assembly of claim 1, wherein: the metal oil filling pipe and the circulating pipe are communicated with the fuel tank through rubber pipes.
5. The novel ORVR steam recovery oil pipe assembly of claim 1, wherein: the air filter is communicated with the vent pipe through a rubber pipe.
6. The novel ORVR steam recovery oil pipe assembly of claim 1, wherein: and a sealing ring is arranged between the oil filling throat pipe and the metal oil filling pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922148776.9U CN211592239U (en) | 2019-12-04 | 2019-12-04 | Novel ORVR steam recovery oil pipe assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922148776.9U CN211592239U (en) | 2019-12-04 | 2019-12-04 | Novel ORVR steam recovery oil pipe assembly |
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| CN211592239U true CN211592239U (en) | 2020-09-29 |
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| CN201922148776.9U Active CN211592239U (en) | 2019-12-04 | 2019-12-04 | Novel ORVR steam recovery oil pipe assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110843510A (en) * | 2019-12-04 | 2020-02-28 | 郑州日产汽车有限公司 | Novel ORVR steam recovery oil pipe assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110843510A (en) * | 2019-12-04 | 2020-02-28 | 郑州日产汽车有限公司 | Novel ORVR steam recovery oil pipe assembly |
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