CN106704653B - Oil tank gravity valve - Google Patents
Oil tank gravity valve Download PDFInfo
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- CN106704653B CN106704653B CN201611235193.4A CN201611235193A CN106704653B CN 106704653 B CN106704653 B CN 106704653B CN 201611235193 A CN201611235193 A CN 201611235193A CN 106704653 B CN106704653 B CN 106704653B
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- Prior art keywords
- lower cover
- oil tank
- float
- floater
- flange seat
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/12—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side weight-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention discloses an oil tank gravity valve which comprises a flange seat, a floater, a middle cylinder and a lower cover, wherein the lower cover is fixedly connected with the flange seat; the flange seat is fixedly connected to the oil tank, the inner cavity of the flange seat can be communicated with the oil tank, and a head valve spring are sequentially arranged in the inner cavity from top to bottom; the float is arranged at the top of the head valve, the middle cylinder is sleeved outside the float, the lower cover is arranged outside the middle cylinder, and the bottom of the lower cover is fixedly connected to the top of the flange seat; the float is provided with the air vent of narrow down wide along the axial, and the top of air vent is provided with the backstop post, is provided with closed ball between the bottom of backstop post and air vent, and closed ball can just can seal the bottom of air vent along air vent reciprocating motion. The oil tank gravity valve can be flexibly opened and closed according to the pressure in the oil tank, and is simple in structure and convenient to operate.
Description
Technical Field
The present invention relates to fuel tank components, and in particular to fuel tank gravity valves.
Background
The fuel tank gravity valve is also called a rollover valve, is an indispensable part in a fuel tank of an automobile and is an important structure for ensuring smooth fuel supply of the fuel tank of the automobile. The gravity valve mainly has the following functions: the breathing control system is used for 'breathing' of the oil tank system, and controlling the pressure in the oil tank to keep the pressure in the oil tank within a certain safety range; preventing the oil tank from being excessively filled with oil; the valve has the function of separating gas and liquid in the oil tank, and the leakage quantity of fuel oil passing through the valve is reduced as much as possible.
The existing oil tank gravity valve has the following defects: 1) The gravity valve cannot timely make flexible response according to the internal air pressure in the oil tank; 2) In the case where the fuel tank is inclined, fuel in the fuel tank is liable to leak from the gravity valve.
Disclosure of Invention
The invention aims to provide an oil tank gravity valve which can be flexibly opened and closed according to the pressure in an oil tank, and is simple in structure and convenient to operate.
In order to achieve the purpose, the invention provides an oil tank gravity valve which comprises a flange seat, a floater, a middle cylinder and a lower cover; the flange seat is fixedly connected to the oil tank, an inner cavity of the flange seat can be communicated with the oil tank, and a head valve spring are sequentially arranged in the inner cavity from top to bottom; the float is arranged at the top of the head valve, the middle cylinder is sleeved outside the float, the lower cover is covered outside the middle cylinder, and the bottom of the lower cover is fixedly connected to the top of the flange seat; the floater is provided with a vent hole which is wide at the top and narrow at the bottom along the axial direction, the top of the vent hole is provided with a stop column, a sealing ball is arranged between the stop column and the bottom of the vent hole, and the sealing ball can reciprocate along the vent hole and can seal the bottom of the vent hole;
under the condition that the air pressure in the oil tank is greater than the gravity of the head valve, the head valve can move upwards under the driving of the air pressure to enable the floater to move upwards, and then the floater, the middle cylinder and the lower cover are in close contact with one another to close the air channel; under the condition that negative pressure is in the oil tank, the head valve can move downwards to enable the head valve and the float, and then the float can move downwards to enable gaps to be formed among the float, the middle cylinder and the lower cover to form an air supplementing channel.
Preferably, a trapezoidal fixing pile is arranged at the bottom of the floater, and a closing plate is clamped on the trapezoidal fixing pile; wherein, the closing plate can move along the length direction of the trapezoidal fixing pile so as to close the top of the vent hole.
Preferably, one end of the closing plate is provided with two clips at intervals, and an annular clamping groove is formed in the middle of the gap between the two clips to clamp the trapezoidal fixing pile.
Preferably, the floater consists of a cylindrical body and a cross key cylinder, the lower part of the cross key cylinder is arranged in the cylindrical body, and the upper part of the cross key cylinder extends outwards to the top of the cylindrical body; the cross key column body is sleeved with a float spring, and the top of the float spring can be in contact with the inner side of the top of the lower cover.
Preferably, the middle part of the middle cylinder is upwards sunken from the bottom to form a through hole, and the side wall of the middle cylinder is upwards sunken to form an annular mounting groove; the tube-shape body can extend to in the annular mounting groove, and cross key cylinder can extend to the through hole.
Preferably, the bottom of the outer wall of the lower cover extends outwards to form an annular clamping plate, a plurality of clamping grooves are formed in the annular clamping plate at intervals, and a plurality of clamping strips are formed on the outer wall of the middle cylinder; under the condition that the middle barrel is sleeved with the lower cover, the clamping strip can be clamped in the clamping groove.
Preferably, the top of the flange seat extends upwards to form a fixing buckle, a plurality of fixing grooves are formed in the annular clamping plate at intervals, and the fixing buckle can be buckled in the fixing grooves.
Preferably, the flange seat is connected with a communicating pipe.
In the technical scheme, the working principle of the oil tank gravity valve provided by the invention is as follows: under the condition that the air pressure in the oil tank is greater than the gravity of the head valve (in a positive pressure state), the head valve can move upwards under the driving of the air pressure to enable the floater to move upwards until the floater, the middle cylinder and the lower cover are in close contact with each other to close the air channel; in the process, the oil tank can be exhausted outwards, and the sealing ball is separated from the bottom of the vent hole, so that the inside of the oil tank can be normally exhausted outwards. Under the condition that the interior of the oil tank is under negative pressure, the head valve can move downwards to enable the head valve and the floater, and further the floater can move downwards to enable a gap to be formed among the floater, the middle cylinder and the lower cover to form an air supplementing channel until the pressure in the oil tank reaches a normal value.
As can be seen from the above description, the gravity valve of the oil tank provided by the present invention mainly plays a role in pressure maintaining, and specifically comprises: fuel steam is prevented from being discharged, so that the load of the carbon canister can be reduced, and the volume of the carbon canister is reduced; the refueling supplementary amount can be properly controlled; when positive pressure is generated in the fuel tank, the exhaust function can be realized, and the deformation and damage of the fuel tank caused by high pressure are avoided; when negative pressure is generated in the fuel tank, air can be supplemented into the fuel tank from the outside. Through detection, the process of air supply and air release of the oil tank gravity valve is shown in fig. 8, and the pressure rise curve is as follows: when the pressure in the oil tank is not enough to jack the opening valve at about 0-4kpa, the oil tank is in a small-flow pressure maintaining state, when the pressure continues to rise to about 23kpa, the closing valve jacks up, the flow channel is closed, the flow is 0, and at the moment, the closing valve is in a blocking state; pressure reduction curve: when the pressure continuously drops to about 17kpa, the closing valve starts to be opened, the flow rate increases due to the fact that the pressure inside the oil tank is large, the flow rate decreases along with the reduction of the pressure of the oil tank, and when negative pressure is generated inside the oil tank, the gravity valve can supplement air from the outside.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is an exploded view of a preferred embodiment of the gravity valve of a fuel tank according to the present invention;
FIG. 2 is a schematic structural view of a preferred embodiment of the lower cover of FIG. 1;
FIG. 3 is a schematic structural view of a preferred embodiment of the cartridge of FIG. 1;
FIG. 4 is a schematic structural view of a preferred embodiment of a perspective of the float of FIG. 1;
FIG. 5 is a schematic structural view of another preferred embodiment from another perspective of the float of FIG. 1;
FIG. 6 is a schematic structural view of a preferred embodiment of the closure panel of FIG. 5;
FIG. 7 is a cross-sectional view of the float of FIG. 1 taken along the vertical direction;
fig. 8 is a diagram showing the detection result of the gravity valve of the fuel tank according to the present invention.
Description of the reference numerals
1. Flange seat 2, head valve spring
3. Head valve 4, float
5. Cross key column 6, float spring
7. Middle cylinder 8, lower cover
9. Fixing buckle 10 and clamping strip
11. Clamping groove 12 and communicating pipe
13. Annular clamping plate 14 and fixing groove
15. Annular mounting groove 16, cylindrical body
17. Closing plate 18, trapezoidal spud pile
19. Card holder
Detailed Description
The following describes in detail embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the terms "upper, lower, top, bottom, inside, outside" and the like included in the terms represent only the orientation of the terms in a conventional use state or are colloquially known by those skilled in the art, and should not be construed as limiting the terms.
The invention provides an oil tank gravity valve, which comprises a flange seat 1, a floater 4, a middle cylinder 7 and a lower cover 8, as shown in figures 1-6; the flange seat 1 is fixedly connected to an oil tank, an inner cavity of the flange seat 1 can be communicated with the oil tank, and a head valve 3 and a head valve spring 2 are sequentially arranged in the inner cavity from top to bottom (the head valve 3 can move along the axis of the inner cavity); the float 4 is arranged at the top of the head valve 3, the middle cylinder 7 is sleeved outside the float 4, the lower cover 8 covers the middle cylinder 7, and the bottom of the lower cover 8 is fixedly connected to the top of the flange seat 1; the floater 4 is provided with a vent hole 20 with a wide upper part and a narrow lower part along the axial direction, the top of the vent hole 20 is provided with a stop column 21, a sealing ball 22 is arranged between the stop column 21 and the bottom of the vent hole 20, and the sealing ball 22 can reciprocate along the vent hole 20 and can seal the bottom of the vent hole 20;
wherein, under the condition that the air pressure in the oil tank is larger than the gravity of the head valve 3, the head valve 3 can move upwards under the driving of the air pressure, so that the floater 4 moves upwards, until the floater 4, the middle cylinder 7 and the lower cover 8 are in close contact with each other to close the air channel; in the case of negative pressure in the oil tank, the head valve 3 can move downward to make the head valve 3 and the float 4, and then the float 4 can move downward to make a gap among the float 4, the middle cylinder 7 and the lower cover 8 to form an air supplementing channel.
The working principle of the oil tank gravity valve is as follows: in the case where the air pressure in the oil tank is greater than the gravity of the head valve 3 (in a positive pressure state), the head valve 3 can move upward under the drive of the air pressure so that the float 4 moves upward until the float 4, the middle tube 7 and the lower cover 8 are in close contact to close the air passage; in the process, the oil tank can be exhausted outwards, and the closing ball 22 is separated from the bottom of the vent hole 20, so that the inside of the oil tank can be normally exhausted outwards. Under the condition of negative pressure in the oil tank, the head valve 3 can move downwards to enable the head valve 3 and the floater 4, and further the floater 4 can move downwards to enable gaps to be formed among the floater 4, the middle cylinder 7 and the lower cover 8 to form an air replenishing channel until the pressure in the oil tank reaches a normal value, namely in the air replenishing process, the head valve 3, the floater 4 and the sealing ball 22 all move downwards gradually, once the pressure in the oil tank reaches the normal value, the sealing ball 22 is in close contact with the bottom of the vent hole 20 to seal the vent hole 20, and the air replenishing process can stop air replenishing.
In the above embodiment, when the fuel tank is inclined, the fuel in the fuel tank can often overflow through the gravity valve, and in order to prevent this, preferably, the bottom of the float 4 is provided with a trapezoid fixing pile 18, and the trapezoid fixing pile 18 is clamped with the closing plate 17; wherein the closing plate 17 can move along the length direction of the trapezoidal fixing peg 18 to be able to close the top of the ventilation hole 20. Therefore, when the oil tank inclines, the closing plate 17 inclines through the trapezoid structure of the trapezoid fixing pile 18, and the inclined closing plate 17 just can close the top of the vent hole 20, so that the gravity valve is closed, namely the fuel leakage is prevented.
In the present invention, the fastening manner of the closing plate 17 and the trapezoidal fixing peg 18 can be selected in a wide range, but in order to further facilitate the installation and the removal of the closing plate 17, it is preferable that one end of the closing plate 17 is provided with two clips 19 at intervals, and the middle part of the gap between the two clips 19 is formed with an annular clamping groove to clamp the trapezoidal fixing peg 18. Therefore, the installation and disassembly convenience can be improved by utilizing the elastic structure of the annular clamping groove.
In the present invention, the specific structure of the float 4 can be selected in a wide range, but in order to facilitate the return of the float 4, it is preferable that the float 4 is composed of a cylindrical body 16 and a cross key cylinder 5, a lower portion of the cross key cylinder 5 is provided inside the cylindrical body 16, and an upper portion of the cross key cylinder 5 is extended outward from a top portion of the cylindrical body 16; the cross key cylinder 5 is sleeved with a float spring 6, and the top of the float spring 6 can be in contact with the inner side of the top of the lower cover 8. Thus, the combination of the cross key cylinder 5 and the float spring 6 and the elastic force of the float spring 6 can be used to quickly realize the downward rebound of the float 4. Meanwhile, the float spring 6 can also play a role in buffering, and the cross key cylinder 5 is prevented from damaging the lower cover 8.
On the basis of the above-mentioned float 4, the concrete structure of the middle tube 7 can be selected in a wide range, but in order to facilitate the installation of the float 4 and the middle tube 7, it is preferable that the middle part of the middle tube 7 is recessed upward from the bottom to form a through hole 14, and the side wall of the middle tube 7 is recessed upward to form an annular installation groove 15; the cylindrical body 16 can extend into the annular mounting groove 15, and the cross key cylinder 5 can extend to the through hole 14. Thus, quick mounting of the float 4 and the intermediate tube 7 can be achieved.
In addition, the specific structure of the lower cover 8 in the present invention can be selected in a wide range, but in order to further improve the installation matching degree of the lower cover 8 and the middle cylinder 7, preferably, the bottom of the outer wall of the lower cover 8 extends outwards to form an annular clamping plate 13, a plurality of clamping grooves 11 are arranged on the annular clamping plate 13 at intervals, and a plurality of clamping strips 10 are formed on the outer wall of the middle cylinder 7; under the condition that the lower cover 8 is sleeved on the middle barrel 7, the clamping strip 10 can be clamped in the clamping groove 11. From this, draw-in groove 11 can play the effect of direction on the one hand, can also play fixed effect simultaneously.
In addition, the fastening method of the lower cover 8 and the flange base 1 can be selected in a wide range, and in order to improve the fastening stability, it is preferable that a fixing clip 9 extends upward from the top of the flange base 1, a plurality of fixing grooves 14 are formed at intervals on the annular clip 13, and the fixing clip 9 can be clipped in the fixing grooves 14. Therefore, the lower cover 8 and the flange seat 1 can be quickly and stably fixed by the matching of the fixing buckle 9 and the fixing groove 14.
Finally, in order to facilitate the connection of the flange base 1 to other components, it is preferable that the flange base 1 is connected with a communication pipe 12, so that the connection of the communication pipe 12 to other components can be utilized.
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 specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective 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 the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (8)
1. The gravity valve of the oil tank is characterized by comprising a flange seat (1), a floater (4), a middle cylinder (7) and a lower cover (8); the flange seat (1) is fixedly connected to an oil tank, an inner cavity of the flange seat (1) can be communicated with the oil tank, and a head valve (3) and a head valve spring (2) are sequentially arranged in the inner cavity from top to bottom; the float (4) is arranged at the top of the head valve (3), the middle cylinder (7) is sleeved outside the float (4), the lower cover (8) is covered outside the middle cylinder (7), and the bottom of the lower cover (8) is fixedly connected to the top of the flange seat (1); the floater (4) is provided with a vent hole (20) which is wide at the top and narrow at the bottom along the axial direction, the top of the vent hole (20) is provided with a stop column (21), a sealing ball (22) is arranged between the stop column (21) and the bottom of the vent hole (20), and the sealing ball (22) can reciprocate along the vent hole (20) and can seal the bottom of the vent hole (20);
wherein, under the condition that the air pressure in the oil tank is greater than the gravity of the head valve (3), the head valve (3) can move upwards under the driving of the air pressure to enable the floater (4) to move upwards, so that the floater (4), the middle cylinder (7) and the lower cover (8) are in close contact to close the air channel; under the condition of negative pressure in the oil tank, the head valve (3) can move downwards to enable the head valve (3) and the floater (4) to move downwards, and then the floater (4) can move downwards to enable a gap to be formed among the floater (4), the middle cylinder (7) and the lower cover (8) to form an air supplementing channel.
2. The tank gravity valve according to claim 1, characterized in that a trapezoidal fixing pile (18) is arranged at the bottom of the float (4), and a closing plate (17) is clamped on the trapezoidal fixing pile (18); wherein the closing plate (17) can move along the length direction of the trapezoidal fixing pile (18) to close the top of the vent hole (20).
3. The fuel tank gravity valve according to claim 2, characterized in that one end of the closing plate (17) is provided with two clips (19) at intervals, and the middle part of the gap of the two clips (19) is provided with an annular clamping groove for clamping the trapezoid fixing pile (18).
4. The tank gravity valve according to any one of claims 1 to 3, characterized in that the float (4) is composed of a cylindrical body (16) and a cross-key cylinder (5), wherein the lower part of the cross-key cylinder (5) is arranged inside the cylindrical body (16), and the upper part of the cross-key cylinder (5) extends outwards out of the top of the cylindrical body (16); the cross key cylinder (5) is sleeved with a float spring (6), and the top of the float spring (6) can be in contact with the inner side of the top of the lower cover (8).
5. The fuel tank gravity valve according to claim 4, characterized in that the middle of the middle cylinder (7) is recessed upwards from the bottom to form a through hole (14), and the side wall of the middle cylinder (7) is recessed upwards to form an annular mounting groove (15); the cylindrical body (16) can extend into the annular mounting groove (15), and the cross key cylinder (5) can extend into the through hole (14).
6. The fuel tank gravity valve according to claim 5, characterized in that the bottom of the outer wall of the lower cover (8) extends outwards to form an annular clamping plate (13), a plurality of clamping grooves (11) are formed in the annular clamping plate (13) at intervals, and a plurality of clamping strips (10) are formed on the outer wall of the middle cylinder (7); under the condition that the lower cover (8) is sleeved on the middle barrel (7), the clamping strip (10) can be clamped in the clamping groove (11).
7. The fuel tank gravity valve according to claim 6, characterized in that a fixing buckle (9) extends upwards from the top of the flange seat (1), a plurality of fixing grooves (14) are arranged on the annular clamping plate (13) at intervals, and the fixing buckle (9) can be buckled in the fixing grooves (14).
8. The tank gravity valve according to claim 6, characterized in that a communication pipe (12) is connected to the flange seat (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611235193.4A CN106704653B (en) | 2016-12-28 | 2016-12-28 | Oil tank gravity valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611235193.4A CN106704653B (en) | 2016-12-28 | 2016-12-28 | Oil tank gravity valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106704653A CN106704653A (en) | 2017-05-24 |
| CN106704653B true CN106704653B (en) | 2023-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611235193.4A Active CN106704653B (en) | 2016-12-28 | 2016-12-28 | Oil tank gravity valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN106704653B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107791830A (en) * | 2017-11-20 | 2018-03-13 | 芜湖顺荣汽车部件有限公司 | Connector built in riveted type fuel tank |
| CN107806523A (en) * | 2017-11-28 | 2018-03-16 | 江西昌河汽车有限责任公司 | Integrated control valve and the fuel tank using the integrated control valve |
| CN113833888A (en) * | 2021-11-03 | 2021-12-24 | 亚普汽车部件股份有限公司 | Compact high pressure reopen valve for vehicle fuel tank |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19707841A1 (en) * | 1996-03-02 | 1997-10-30 | Alfmeier Walter Gmbh & Co | Spring loaded float-operated breather valve for fuel tanks of vehicles |
| CN201189819Y (en) * | 2008-03-27 | 2009-02-04 | 高尚玉 | Single-stage gravity valve, double stage gravity valve and multifunction valve |
| CN202381778U (en) * | 2012-02-02 | 2012-08-15 | 斯丹德汽车系统（苏州）有限公司 | Automobile gravity valve capable of retreating easily |
| CN205523671U (en) * | 2016-01-08 | 2016-08-31 | 亚普汽车部件股份有限公司 | Can compatible external welding and built -in welded oil tank valve |
-
2016
- 2016-12-28 CN CN201611235193.4A patent/CN106704653B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19707841A1 (en) * | 1996-03-02 | 1997-10-30 | Alfmeier Walter Gmbh & Co | Spring loaded float-operated breather valve for fuel tanks of vehicles |
| CN201189819Y (en) * | 2008-03-27 | 2009-02-04 | 高尚玉 | Single-stage gravity valve, double stage gravity valve and multifunction valve |
| CN202381778U (en) * | 2012-02-02 | 2012-08-15 | 斯丹德汽车系统（苏州）有限公司 | Automobile gravity valve capable of retreating easily |
| CN205523671U (en) * | 2016-01-08 | 2016-08-31 | 亚普汽车部件股份有限公司 | Can compatible external welding and built -in welded oil tank valve |
Non-Patent Citations (1)
| Title |
|---|
| 宋智，孟凤英，郑界如.浮动式液位控制装置的设计.河北职业技术师范学院学报.1994,(02),全文. * |
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| CN106704653A (en) | 2017-05-24 |
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