CN210564822U - Liquid collecting box and fuel tank with same - Google Patents

Abstract

The utility model provides a collect liquid box and have fuel tank of this collection liquid box belongs to vehicle chassis technical field. The technical problem that liquid oil in an existing fuel tank possibly flows into a carbon tank to cause failure of the carbon tank is solved. This collection liquid box and have fuel tank of this collection liquid box, including inclosed box body, the box body has and is used for installing the bottom plate on the fuel tank, offer the air inlet that is used for supplying fuel vapour to get into on the box body and be used for supplying fuel vapour exhaust gas vent, the position of air inlet is less than the position of gas vent, the swash plate that the bottom plate set up for the slope, the air inlet sets up in the lower one side of bottom plate, the gas vent sets up in the higher one side of bottom plate. The utility model discloses can effectively prevent that the liquid oil in the fuel tank from flowing into the carbon tank.

Description

Liquid collecting box and fuel tank with same

Technical Field

The utility model belongs to the technical field of vehicle chassis, concretely relates to liquid collection box and have fuel tank of this liquid collection box.

Background

In order to meet the emission standard requirements of national policies on automobiles, the conventional fuel supply system generally comprises a fuel tank, a vent valve and a carbon tank, wherein the vent valve and the carbon tank are communicated with the fuel tank, and the oil vapor in the fuel tank can be discharged into the carbon tank through a pipeline connecting the vent valve and the carbon tank during the automobile refueling process, so that the oil vapor is prevented from being directly discharged into the atmosphere. However, in the case where the fuel tank is full or bumpy or rollover, etc., the liquid fuel in the fuel tank is liable to enter the canister through the evaporation pipe, causing the canister to fail.

In order to solve the problem, the Chinese patent application document (application number: 201821009918.2; published as 2018.06.28) discloses a fuel tank with a liquid collecting box, which comprises the liquid collecting box clamped on the fuel tank, wherein a partition plate for dividing the liquid collecting box into an upper layer and a lower layer is arranged in the liquid collecting box, the upper layer is provided with a fuel vapor outlet, the fuel vapor outlet is communicated with a carbon tank through a carbon tank connecting pipe, the lower layer is provided with a fuel vapor inlet, the fuel vapor inlet is communicated with a gravity valve of the fuel tank through a fuel tank evaporating pipe, and the partition plate is provided with a fuel vapor through hole, so that fuel vapor can smoothly pass through the liquid collecting box when a vehicle is normally refueled. This technical scheme sets up through album liquid box and collection liquid box baffle, under the full oil of fuel tank or jolt or turn on one's side the circumstances such as, can make the liquid oil in the fuel tank advance into the lower floor of album liquid box, alleviate the velocity of flow of liquid oil flow to carbon tank to a certain extent, nevertheless the fuel vapor export in this album liquid box sets up with fuel vapor import is adjacent, the thickness of album liquid box is thinner simultaneously, the height that leads to upper strata and lower floor is less, when the flow of the liquid oil that flows to album liquid box is great or the velocity of flow is very fast, the phenomenon that leads to its inefficacy in the liquid oil inflow carbon tank still can appear.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the above-mentioned problem that prior art exists, provide a liquid collecting box and have this liquid collecting box's fuel tank, the utility model aims to solve the technical problem that: how to effectively prevent liquid oil in a fuel tank from flowing into a carbon tank.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a liquid collection box, includes inclosed box body, the box body has and is used for installing the bottom plate on the fuel tank, offer the air inlet that is used for supplying fuel vapour to get into on the box body and be used for supplying fuel vapour exhaust gas vent, the position of air inlet is less than the position of gas vent, the swash plate that the bottom plate set up for the slope, the air inlet sets up in the lower one side of bottom plate, the gas vent sets up in the higher one side of bottom plate.

The bottom plate is the swash plate that the slope set up, can make the liquid oil that gets into in the fuel tank flow downwards along the swash plate under the action of gravity, the air inlet sets up in the lower one side of bottom plate simultaneously, the gas vent sets up in the higher one side of bottom plate, and the position of air inlet is less than the position of gas vent, make the liquid oil that flows into in the box body collect in air inlet department earlier, the liquid oil that collects in air inlet department in the box body can block the outer liquid oil of air inlet and continue to get into the box body, show the effect of blockking that improves the box body to liquid oil inflow box body, prevent that liquid oil from flowing from the box body gas vent, thereby effectively prevent the liquid oil inflow carbon canister.

In foretell collection liquid box, the box body is still including setting up the long framework on the bottom plate, long framework is including long curb plate one, short curb plate one, long curb plate two and short curb plate two of end to end in proper order, the air inlet is located short curb plate one, the gas vent is located short curb plate two. The short side edge that air inlet and gas vent set up and rectangular framework is favorable to increasing the distance between air inlet and the gas vent promptly, improves the box body and to the effect that blocks of liquid oil from the gas vent outflow, ensures that liquid oil can not follow the box body gas vent outflow to effectively prevent the liquid oil inflow carbon canister in the fuel tank.

In the liquid collecting box, the air inlet is positioned on one side, close to the first long side plate, of the first short side plate, and the air outlet is positioned on one side, close to the second long side plate, of the second short side plate. The air inlet and the air outlet are arranged towards a group of opposite angles of the box body respectively, so that the distance between the air inlet and the air outlet can be further increased, liquid oil is ensured not to flow out from the air outlet of the box body, and the liquid oil in the fuel tank is effectively prevented from flowing into the carbon tank.

In the liquid collecting box, a labyrinth track communicated with the air inlet and the air outlet is arranged in the box body, and the labyrinth track is used for fuel vapor to pass through. The orbital setting in maze both can ensure that the vehicle normally refuels the time fuel vapour and pass through the box body smoothly, multiplicable box body is to the resistance of liquid oil flow to the gas vent again, prevents effectively that liquid oil from flowing from the gas vent, compares in the baffle in current collection liquid box and the trompil structure on the baffle, and this patent both can improve the smooth and easy nature of circulation of fuel vapour in the box body, can improve the box body again and to the effect that blocks of liquid oil, prevents effectively that the liquid oil in the fuel tank from flowing into the carbon tank.

In foretell collection liquid box, the maze track is including baffle one and baffle two that are close to air inlet one side and set up, the one end of baffle one links to each other with long curb plate one, the other end of baffle one extend towards short curb plate one and with short curb plate one between form clearance one, the one end of baffle two links to each other with long curb plate two, the other end of baffle two extend towards baffle one and with baffle one between form clearance two. Oil vapor can flow into the space between the first baffle and the second baffle from the gap along the first baffle through the air inlet and then flows out from the second gap, so that the length of a flow path of the oil vapor flowing to the air outlet from the air inlet can be increased by arranging the first baffle and the second baffle, the blocking effect of the labyrinth track on the liquid oil flowing to the air outlet is favorably improved, and the liquid oil in the fuel tank is effectively prevented from flowing into the carbon tank.

In the above liquid collecting box, the labyrinth track further comprises a groove, one end of the groove is connected with the air outlet, the other end of the groove extends towards the second gap, and the cross-sectional area of one end, close to the air outlet, of the groove is smaller than that of one end, close to the second gap, of the groove. The end of the groove close to the second gap is a large end, and the end close to the exhaust port is a small end, so that oil vapor flowing out of the second gap can flow into the groove through the large end of the groove and then flow out of the exhaust port at the small end of the groove, and the groove is favorable for guiding the oil vapor to the exhaust port, so that the oil vapor can smoothly flow through the box body. Preferably, the recess has the straightway of being connected with the gas vent, has a certain interval between the cell wall of straightway and the inside wall of bottom plate, can prevent that the liquid oil in the box body from advancing the straightway to effectively prevent the liquid oil inflow carbon canister in the fuel tank.

In the liquid collecting box, a partition plate is arranged at one end port of the groove close to the second gap, two ends of the partition plate are respectively connected with adjacent side walls of the groove, and strip-shaped through holes are formed in the partition plate. The baffle can further improve the barrier effect of maze track to liquid oil flow direction gas vent, and the bar through-hole is convenient for oil vapour to pass through.

The utility model provides a fuel tank, includes the box, be equipped with a collection liquid box on the box, a collection liquid box includes inclosed box body, the box body has and is used for installing the bottom plate on the fuel tank, offer the air inlet that is used for supplying fuel vapour to get into and be used for supplying fuel vapour exhaust gas vent on the box body, the position of air inlet is less than the position of gas vent, the swash plate that the bottom plate set up for the slope, the air inlet sets up in the lower one side of bottom plate, the gas vent sets up in the higher one side of bottom plate. Preferably, the outer side surface of the bottom plate is fixedly provided with a clamping jaw, and the fuel tank is provided with a clamping groove for mounting the clamping jaw, so that the liquid collecting box can be conveniently mounted and dismounted on the fuel tank.

In the fuel tank, a vent valve is arranged on the tank body, an outlet of the vent valve is communicated with the air inlet, and the vent valve is a large-displacement vent valve. A large displacement vent valve can meet a large fuel vapor desorption rate. Preferably, the vent valve is an FLVV valve and integrates a fuel filling amount control function (opening and closing are controlled through the height of a float), so that the fuel filling amount control accuracy can be improved, and overflow caused by excessive fuel amount is prevented.

In the above fuel tank, the tank body comprises a plurality of layers of material including an intermediate EVOH barrier layer having a thickness equal to or greater than 3% of the tank body thickness. Compare in traditional box EVOH barrier layer's thickness about 1% of box thickness, the thickness of EVOH barrier layer obviously increases in this patent, improves the prevention of seepage ability of box after the fuel soaks, reduces the emission of oil vapour.

Compared with the prior art, the utility model has the advantages of it is following: the liquid collecting box is provided with a bottom plate which is obliquely arranged, an air inlet of the liquid collecting box is arranged on one side of the bottom plate, an air outlet of the air outlet is arranged on one side of the bottom plate, and the position of the air inlet is lower than that of the air outlet, so that liquid oil flowing into the box body is collected at the air inlet first, the blocking effect of the box body on the liquid oil flowing into the box body is obviously improved, the liquid oil is prevented from flowing out from the air outlet of the box body, the liquid oil in the fuel tank is effectively prevented from flowing into.

Drawings

Fig. 1 is a schematic overall structure diagram of the first embodiment.

Fig. 2 is an exploded schematic view of the first embodiment.

FIG. 3 is a top view of the first embodiment with the cover removed.

FIG. 4 is a block diagram of another perspective of an embodiment with the cover removed.

Fig. 5 is a schematic view of the overall structure of the second embodiment.

Fig. 6 is a rear view of the second embodiment.

In the figure, 1, a box body; 2. a box body; 2a, an air inlet; 2b, an exhaust port; 21. a base plate; 22. a first long side plate; 23. a second long side plate; 24. a first short side plate; 25. a short side plate II; 26. a cover plate; 3. a first baffle plate; 3a, a gap I; 4. a second baffle plate; 4a, a gap II; 5. a groove; 6. a partition plate; 6a, strip-shaped through holes; 7. a vent valve; 8. an OBD sensor.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

The utility model provides a collection liquid box, as shown in fig. 1 and 2, including inclosed box body 2, box body 2 includes the bottom plate 21 of rectangle, is equipped with on the bottom plate 21 along the long curb plate 22 and the long curb plate two 23 that bottom plate 21 length direction set up and along the short curb plate 24 and the short curb plate two 25 that bottom plate 21 width direction set up, long curb plate 22, short curb plate 24, long curb plate two 23, short curb plate two 25 are end to end in proper order and form long square frame body, long square frame body upper cover is equipped with apron 26. The bottom plate 21 is provided with a cover plate 26 for mounting on the fuel tank, and the bottom plate 21 is an inclined plate which is arranged obliquely and can make the liquid fuel entering the fuel tank flow downwards along the inclined plate under the action of gravity. As shown in fig. 3 and 4, an air inlet 2a for allowing fuel vapor to enter is formed in the first short side plate 24, an exhaust port 2b for allowing fuel vapor to be exhausted is formed in the second short side plate 25, the air inlet 2a and the exhaust port 2b are arranged on the short side edge of the rectangular frame body, the distance between the air inlet 2a and the exhaust port 2b is increased, and the blocking effect of the box body 2 on the outflow of liquid oil from the exhaust port 2b is improved. Air inlet 2a sets up in the lower one side of bottom plate 21, gas vent 2b sets up in the higher one side of bottom plate 21, simultaneously the position of air inlet 2a is less than gas vent 2 b's position, make the liquid oil that flows into in box body 2 collect earlier in air inlet 2a department, the liquid oil that collects in air inlet 2a department in box body 2 can block the outer liquid oil of air inlet 2a and continue to get into box body 2, show and improve the block effect of box body 2 to liquid oil inflow box body 2, prevent that liquid oil from flowing out from 2 gas vents 2b of box body, thereby effectively prevent that the liquid oil in the fuel tank from flowing into the carbon canister, avoid the carbon canister inefficacy.

Specifically, the up end of short curb plate 24, the up end of short curb plate two 25, the up end of long curb plate 22 and the up end parallel and level of long curb plate two 23 set up, apron 26 is a horizontal plate, air inlet 2a sets up in the lower extreme of short curb plate 24, the position setting of air inlet 2a makes it more be close to the extreme low position of bottom plate 21 promptly, be favorable to improving the liquid oil of gathering in air inlet 2a department in box body 2 and to the effect of blockking of the outer liquid oil of air inlet 2a, thereby effectively prevent the liquid oil in the fuel tank from flowing into the carbon tank.

The box body 2 is internally provided with a labyrinth track which is communicated with the air inlet 2a and the air outlet 2b and is used for fuel vapor to pass through. Specifically, the labyrinth track includes a first baffle 3 and a second baffle 4 which are arranged near one side of the air inlet 2a, one end of the first baffle 3 is connected with a first long side plate 22, the other end of the first baffle 3 extends towards the first short side plate 24 and forms a first gap 3a with the first short side plate 24, one end of the second baffle 4 is connected with a second long side plate 23, and the other end of the second baffle 4 extends towards the first baffle 3 and forms a second gap 4a with the first baffle 3. The labyrinth track still includes recess 5, and the cross sectional area of the one end of recess 5 is greater than the cross sectional area of the other end, makes the both ends of recess 5 be main aspects and tip respectively, and the tip of recess 5 links to each other with gas vent 2b, and the main aspects of recess 5 extends towards second 4a in clearance. Oil vapor can flow into the space between the first baffle plate 3 and the second baffle plate 4 from the first gap 3a along the first baffle plate 3 through the air inlet 2a, then flows out from the second gap 4a, then flows into the groove 5 through the large end of the groove 5, and then flows out from the air outlet 2b at the small end of the groove 5. The arrangement of the first baffle 3 and the second baffle 4 can increase the length of a flow path of oil vapor flowing from the air inlet 2a to the air outlet, and is beneficial to improving the blocking effect of the labyrinth track on liquid oil flowing to the air outlet 2b, so that the liquid oil in the fuel tank is effectively prevented from flowing into the carbon tank; the arrangement of the groove 5 is beneficial to guiding the oil vapor to the exhaust port 2b, so that the oil vapor smoothly flows through the box body 2. Therefore, the arrangement of the labyrinth track can ensure that fuel steam smoothly passes through the box body 2 when the vehicle is normally refueled, and can increase the resistance of the box body 2 to liquid oil flowing to the exhaust port 2b, thereby effectively preventing the liquid oil from flowing out of the exhaust port 2 b.

The groove 5 has a straight line section connected to the exhaust port 2b and a bent section connected to the straight line section. The port department of kink is equipped with baffle 6, and the both ends of baffle 6 link to each other with the cell wall of kink respectively, can further improve the effect of blockking of labyrinth track to liquid oil flow to gas vent 2 b. The partition plate 6 is provided with a strip-shaped through hole 6a for facilitating the oil vapor to pass through. A certain distance is reserved between the groove wall of the straight line section and the inner side wall of the bottom plate 21, so that liquid oil in the box body 2 can be prevented from entering the straight line section, and the liquid oil in the fuel tank can be effectively prevented from flowing into the carbon tank.

Be equipped with a plurality of blocks protrudingly on apron 26's the downside, block protrudingly respectively with the upper end of short curb plate 24, the upper end of short curb plate two 25, the upper end of long curb plate 22 and the upper end butt of long curb plate two 23, a plurality of draw-in grooves still say on apron 26's the downside simultaneously, the cell wall of draw-in groove is deep in box body 2, and the upper end card of labyrinth track baffle 3 or the upper end card of baffle two 4 go into to the draw-in groove in, make apron 26 firm lid locate in the rectangular framework.

Example two

As shown in fig. 5 and 6, the fuel tank comprises a tank body 1 and the liquid collecting box of the first embodiment, wherein clamping jaws are fixedly arranged on the outer side surface of a bottom plate 21, and clamping grooves for mounting the clamping jaws are formed in the tank body 1, so that the liquid collecting box can be conveniently mounted and dismounted on the first embodiment.

Set up two mounting holes that are used for installing the fuel pump on the box 1, the installation department is provided with abaculus ring and chuck, and the abaculus ring is integrative with the oil tank is integrated when the fuel tank blowing, screws through the chuck after the assembly oil pump and targets in place, and compression oil pump flange face below O type sealing washer (FKM fluororubber, ageing-resistant, resistant oily performance is excellent) reaches sealed requirement.

The box 1 comprises six material layers, the six material layers comprise an EVOH blocking layer located in the middle, the thickness of the EVOH blocking layer is larger than or equal to 3% of the thickness of the box, the anti-seepage capability of the box 1 after fuel oil immersion is improved, and the emission of oil evaporation is reduced.

An OBD sensor 8 is arranged on a pipeline for communicating the liquid collecting box and the carbon tank, and the OBD sensor 8 is used for the fuel system tightness diagnosis function. And identifying leakage faults in time.

The embodiment also comprises a vent valve 7 arranged on the box body 1, and the outlet of the vent valve 7 is communicated with the air inlet 2a of the liquid collecting box. Preferably, the vent valve 7 is an FLVV valve, which is a large discharge vent valve, and can increase the fuel vapor desorption rate to meet the emission standard of the large fuel tank in the sixth nation. Preferably, the FLVV valve integrates a fuel charge control function (opening and closing controlled by the float height), improves the fuel charge control accuracy, and prevents an abnormality such as overflow due to an excessive fuel charge.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although 1, a box is used more herein; 2. a box body; 2a, an air inlet; 2b, an exhaust port; 21. a base plate; 22. a first long side plate; 23. a second long side plate; 24. a first short side plate; 25. a short side plate II; 26. a cover plate; 3. a first baffle plate; 3a, a gap I; 4. a second baffle plate; 4a, a gap II; 5. a groove; 6. a partition plate; 6a, strip-shaped through holes; 7. a vent valve; 8. OBD sensors, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. The utility model provides a collection liquid box, includes inclosed box body (2), box body (2) have and are used for installing bottom plate (21) on the fuel tank, offer on box body (2) and be used for supplying air inlet (2a) that fuel steam got into and be used for supplying exhaust gas vent (2b) of fuel steam, its characterized in that, the position of air inlet (2a) is less than the position of gas vent (2b), bottom plate (21) is the swash plate that the slope set up, air inlet (2a) set up in the lower one side of bottom plate (21), gas vent (2b) set up in the higher one side of bottom plate (21).

2. The liquid collection box according to claim 1, wherein the box body (2) further comprises a rectangular frame body arranged on the bottom plate (21), the rectangular frame body comprises a first long side plate (22), a first short side plate (24), a second long side plate (23) and a second short side plate (25) which are connected end to end in sequence, the air inlet (2a) is positioned on the first short side plate (24), and the air outlet (2b) is positioned on the second short side plate (25).

3. The liquid collection box according to claim 2, wherein said air inlet (2a) is located on the side of the short side plate one (24) adjacent to the long side plate one (22), and said air outlet (2b) is located on the side of the short side plate two (25) adjacent to the long side plate two (23).

4. A cartridge as claimed in claim 2 or 3, wherein a labyrinth track is provided in the cartridge body (2) to communicate the inlet (2a) and the outlet (2b) for the passage of fuel vapour.

5. The drip box according to claim 4, wherein said labyrinth track comprises a first baffle plate (3) and a second baffle plate (4) which are arranged near one side of the air inlet (2a), one end of said first baffle plate (3) is connected with a first long side plate (22), the other end of said first baffle plate (3) extends towards a first short side plate (24) and forms a first gap (3a) with said first short side plate (24), one end of said second baffle plate (4) is connected with a second long side plate (23), and the other end of said second baffle plate (4) extends towards said first baffle plate (3) and forms a second gap (4a) with said first baffle plate (3).

6. The drip box according to claim 5, wherein said labyrinth rail further comprises a groove (5), one end of said groove (5) is connected to the air outlet (2b), the other end of said groove (5) extends toward the gap two (4a), and the cross-sectional area of the end of said groove (5) near the air outlet (2b) is smaller than the cross-sectional area of the end of the groove (5) near the gap two (4 a).

7. A liquid collection box as claimed in claim 6, wherein a partition (6) is provided at the end of the groove (5) near the second gap (4a), both ends of the partition (6) are respectively connected with the adjacent side walls of the groove (5), and a strip-shaped through hole (6a) is provided on the partition (6).

8. The utility model provides a fuel tank, includes box (1), be equipped with a liquid collecting box on box (1), a liquid collecting box includes inclosed box body (2), box body (2) have and are used for installing bottom plate (21) on the fuel tank, offer on box body (2) and be used for supplying air inlet (2a) that fuel steam got into and be used for supplying fuel steam exhaust gas vent (2b), its characterized in that, the position of air inlet (2a) is less than the position of gas vent (2b), the swash plate that bottom plate (21) set up for the slope, air inlet (2a) set up in the lower one side of bottom plate (21), gas vent (2b) set up in the higher one side of bottom plate (21).

9. Fuel tank according to claim 8, characterized in that a vent valve (7) is provided on the tank (1), the outlet of the vent valve (7) being in communication with the inlet (2a), the vent valve (7) being a large displacement vent valve.

10. Fuel tank according to claim 8, characterized in that the tank (1) comprises a multilayer material layer comprising an intermediate EVOH barrier layer having a thickness equal to or greater than 3% of the tank thickness.

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