CN112461328B - Dipstick with high-reliability sealing structure - Google Patents
Dipstick with high-reliability sealing structure Download PDFInfo
- Publication number
- CN112461328B CN112461328B CN202011269791.XA CN202011269791A CN112461328B CN 112461328 B CN112461328 B CN 112461328B CN 202011269791 A CN202011269791 A CN 202011269791A CN 112461328 B CN112461328 B CN 112461328B
- Authority
- CN
- China
- Prior art keywords
- oil tank
- guide rod
- assembly
- interface
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 28
- 239000003292 glue Substances 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 40
- 230000000903 blocking effect Effects 0.000 claims description 14
- 239000000295 fuel oil Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 5
- 239000002828 fuel tank Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 241001227561 Valgus Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/04—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by dip members, e.g. dip-sticks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D37/00—Arrangements in connection with fuel supply for power plant
- B64D37/02—Tanks
- B64D37/06—Constructional adaptations thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The invention relates to a high-reliability oil dipstick with a sealing structure, which is characterized in that a base support is arranged to fix a guide rod on a lower wall plate of an oil tank, a magnetic float assembly is arranged on the outer side of the guide rod, the lower wall plate of the oil tank is inserted into the guide rod through the base support, a magnet on the magnetic float assembly and the magnetic scale assembly controls the reading of the scale rod, in order to ensure the tightness of the oil tank where the scale rod assembly is inserted into the guide rod, a rubber pad, a rubber strip and an O-shaped ring are arranged according to different interfaces on the structure, the tightness and the reliability of the device are further improved by filling sealing glue solution and smearing screw glue solution, and meanwhile, an end cap is arranged at the top of the guide rod to limit the magnetic float assembly in an up-down floating manner, so that the high reliability and the tightness of the magnetic float type oil tank are finally realized.
Description
Technical Field
The invention belongs to the field of fuel oil tank sealing, and particularly relates to a dipstick with a high-reliability sealing structure.
Background
At present, a magnetic float type fuel oil tank dipstick with a very mature technology is commonly adopted as a dipstick for assisting in measuring fuel oil quantity of an airplane, and the dipstick with the structure needs to penetrate through the wall of the fuel oil tank so as to consider the sealing reliability of a fuel oil tank joint. At present, the sealing reliability of the magnetic float type fuel tank dipstick at the joint is ensured by using O-shaped rings, the phenomenon determines that the service life of the product is almost only dependent on the O-shaped rings which play a role in sealing, and the O-shaped rings are easy to age, corrode or fail due to other reasons, so that the O-shaped rings are required to be replaced by releasing fuel disassembly products. The dipstick of the fuel tank is required to have higher service life and high reliability under the condition that the service life of the modern general aircraft is greatly prolonged, and the requirements are limited by the service life and the reliability of the sealing O-shaped ring.
Disclosure of Invention
The invention provides the oil dipstick based on the high-reliability sealing structure based on solving the defects of the prior art, and the oil dipstick outlet of the magnetic float type oil tank is provided with a plurality of sealing structures, so that the higher reliability and sealing performance of the oil tank are realized, and the service life of the oil tank is prolonged.
The specific implementation content of the invention is as follows:
a dipstick with a high-reliability sealing structure is arranged in a fuel oil tank and penetrates through a lower wall plate of the fuel oil tank, and comprises a magnetic float assembly, a guide rod, an interface cavity, a base support, an upper first O-shaped ring and a scale rod assembly;
The base support is fixedly connected with the lower wall plate of the oil tank through screws, and the upper first O-shaped ring is positioned between the base support and the lower wall plate of the oil tank;
The substrate support is of a hollow structure, and the hollow structure is divided into an interface cavity body positioned at the upper end part of the hollow structure and a cylindrical lower cavity mouth positioned at the lower end part of the hollow structure;
The guide rod is arranged in the oil tank, the bottom port of the guide rod is in an outwards turned horn shape, and the rubber pad and the bottom port of the guide rod are arranged and integrally arranged in the interface cavity; the upper port of the interface cavity is an adduction horn shape matched with the bottom port of the guide rod;
The magnetic float assembly and the scale rod assembly are provided with magnets which are attracted with each other, wherein the magnetic float assembly is movably arranged outside the guide rod and is attached to the outside of the guide rod, and the scale rod assembly penetrates through a cylindrical lower cavity opening and an interface cavity of the substrate support from the bottom of the lower wall plate of the oil tank and is arranged inside the guide rod.
In order to better realize the invention, the invention further comprises a spring, a blocking sleeve, a lower second O-shaped ring and a rubber strip; the spring is arranged at the end head of the scale bar assembly and forms a self-locking structure with the lower wall plate of the oil tank; the blocking sleeve is arranged between the upper end part of the cylindrical lower cavity opening and the scale rod assembly, is an annular sleeve and is positioned above the spring in the cylindrical lower cavity opening; the lower second O-shaped ring is positioned at the bottom of the interface cavity port and fixedly connected with the upper end of the blocking sleeve, the diameter of the central hole of the lower second O-shaped ring is the same as the diameter of the scale rod assembly, and the radius of the outer ring of the lower second O-shaped ring is the same as the radius of the bottom of the interface cavity port; the rubber strip is provided with a shielding layer and is positioned between the inner end of the adduction trumpet-shaped upper port of the interface cavity and the rubber pad.
In order to better realize the invention, further, the rubber pad is integrally arranged with the bottom end opening of the guide rod, is fixed in the interface cavity through the interface thread, and is coated with the thread compound at the interface thread; and sealing glue solution capable of being cured at normal temperature is coated between the interface cavity and the guide rod.
To better practice the invention, further comprising an end cap mounted on the top end of the guide rod, the end cap having a diameter greater than the diameter of the guide rod through hole in the magnetic float assembly.
Compared with the prior art, the invention has the following advantages:
Has higher reliability and sealing performance.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the base and the lower wall plate of the fuel tank.
Wherein: 1. the end cap, 2, magnetism float assembly, 3, guide arm, 4, interface cavity, 5, rubber strip, 6, rubber pad, 7, base support, 8, oil tank lower wall plate, 9, upper portion first O type circle, 10, spring, 11, sprue bush, 12, lower part second O type circle, 13, scale rod assembly.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments, and therefore should not be considered as limiting the scope of protection. All other embodiments, which are obtained by a worker of ordinary skill in the art without creative efforts, are within the protection scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; or may be directly connected, or may be indirectly connected through an intermediate medium, or may be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1:
A dipstick with a high reliability sealing structure, as shown in fig. 1 and 2, is installed in a fuel tank and penetrates through a lower wall plate 8 of the fuel tank, and comprises a magnetic float assembly 2, a guide rod 3, an interface cavity 4, a base support 7, an upper first O-shaped ring 9 and a scale rod assembly 13;
The base support 7 is fixedly connected with the lower wall plate 8 of the oil tank through bolts, and the upper first O-shaped ring 9 is positioned between the base support 7 and the lower wall plate 8 of the oil tank;
the substrate support 7 is a hollow structure, and the hollow structure is divided into an interface cavity 4 positioned at the upper end part of the hollow structure and a cylindrical lower cavity mouth positioned at the lower end part;
The guide rod 3 is arranged in the oil tank, the bottom port of the guide rod 3 is in an outwards turned horn shape, and the rubber pad 6 and the bottom port of the guide rod 3 are integrally arranged in the interface cavity 4; the upper port of the interface cavity 4 is an inward-folding horn shape matched with the bottom port of the guide rod 3;
The magnetic float assembly 2 and the scale bar assembly 13 are provided with magnets which attract each other, wherein the magnetic float assembly 2 is movably arranged outside the guide bar 3, and the scale bar assembly 13 is arranged inside the guide bar 3 from the bottom of the lower wall plate 8 of the oil tank through the cylindrical lower cavity opening of the base support 7 and the interface cavity 4.
Working principle: the oil tank is internally provided with a guide rod 3, the guide rod 3 is fixedly connected with a base support 7, the base support 7 is fixedly connected with an oil tank lower wall plate 8 of the oil tank, a magnetic float assembly 2 is movably connected to the outside of the guide rod 3, a scale rod assembly 13 is inserted into the guide rod 3 through the oil tank lower wall plate 8, attractive magnets are arranged in the scale rod assembly 13 and the magnetic float assembly 2, the magnetic float assembly 2 is movably lifted on the guide rod 3 along with the lifting of an oil surface, the scale rod assembly 13 and the magnetic float assembly 2 are attracted through the magnets, the oil level scale is arranged at the lower end of the scale rod assembly 13 along with the lifting of the magnetic float assembly 2, and the scale corresponding to the position of the oil tank lower wall plate 8 is exposed through the lifting of the scale rod assembly 13 to display the fuel quantity in the oil tank. The sealing performance of the outlets of the base support and the lower wall plate 8 of the oil tank can be improved by arranging the upper first O-shaped ring 9 on the base support 7 and the lower wall plate 8 of the oil tank; the rubber pad of bottom port integrated installation both can avoid the damage of bottom port in the bottom port setting of guide arm 3, can also realize the sealing of interface cavity 4 and guide arm 3 junction, the leakproofness of oil tank has been strengthened, and the bottom port sets up to the horn of valgus, and the last port of interface cavity 4 is the horn of adduction, both cooperations, can make guide arm 3 fix in interface cavity 4 more firmly, and the adduction of port on the interface cavity 4, laminate more with guide arm 3, the gap that the fuel probably flows in is just littleer yet, and the external horn cooperation rubber pad 6 of bottom port for the space in the interface cavity 4 is inseparabler.
Example 2:
On the basis of the embodiment 1, in order to better realize the invention, as shown in fig. 1 and 2, the device further comprises a spring 10, a blocking sleeve 11, a lower second O-ring 12 and a rubber strip 5; the spring 10 is arranged at the end of the scale bar assembly 13 and forms a self-locking structure with the lower wall plate 8 of the oil tank; the blocking sleeve 11 is arranged between the upper end part of the cylindrical lower cavity opening and the scale bar assembly 13, the blocking sleeve 11 is an annular sleeve and is positioned above the spring 10 in the cylindrical lower cavity opening; the lower second O-shaped ring 12 is positioned at the bottom of the port of the interface cavity 4 and is fixedly connected with the upper end of the blocking sleeve 11, the diameter of the central hole of the lower second O-shaped ring 12 is the same as the diameter of the scale rod assembly 13, and the radius of the outer ring of the lower second O-shaped ring 12 is the same as the radius of the bottom of the port of the interface cavity 4; the rubber strip 5 is provided with a shielding layer and is positioned between the inner end of the adduction trumpet-shaped upper port of the interface cavity 4 and the rubber pad 6.
Working principle: the self-locking structure formed by the spring 10 locks the scale bar assembly 13 in the cylindrical lower cavity opening above the lower wall plate 8 of the oil tank when the oil tank is not in operation, and the scale bar assembly 13 can be exposed out of the lower wall plate 8 of the oil tank to lift along with the magnetic float assembly 2 when the oil tank is in operation. The sealing performance of the scale bar assembly 13 and the cylindrical lower cavity opening can be improved by arranging the blocking sleeve 11, and the sealing performance of the joint cavity 4, the cylindrical lower cavity opening and the guide bar 3 can be improved by arranging the second O-shaped ring 12 at the lower part of the upper end of the blocking sleeve 11, so that the blocking sleeve 11 can be fixed. Meanwhile, a rubber strip 5 with a shielding layer is arranged between the inner end of the adduction horn-shaped upper port of the interface cavity 4 and the rubber pad 6, and the rubber strip 5 can ensure the electric lap joint between the guide rod 3 and the interface cavity 4 and between the guide rod and the base support 7, so that the electric connection with an oil tank is realized, and the rubber pad 6 can be extruded, so that better sealing performance is achieved.
Other portions of this embodiment are the same as those of embodiment 1 described above, and thus will not be described again.
Example 3:
On the basis of any one of the above embodiments 1-2, in order to better implement the present invention, as shown in fig. 1 and 2, further, the rubber pad 6 is integrally installed with the bottom end opening of the guide rod 3, and is fixed in the interface cavity 4 through the interface thread, and the thread glue is coated on the interface thread; sealing glue solution capable of being cured at normal temperature is coated between the interface cavity 4 and the guide rod 3.
Working principle: the fixing of the guide rod 3 and the interface cavity 4 can be more compact through the interface screw thread, so that the reliability of the oil tank is enhanced, and the screw thread glue solution is coated on the upper surface of the interface screw thread, so that the tightness of the interface is better.
Other portions of this embodiment are the same as any of embodiments 1-2 described above, and thus will not be described again.
Example 4:
On the basis of any one of the above embodiments 1-3, in order to better realize the invention, as shown in connection with fig. 1, further comprising an end cap 1, said end cap 1 being mounted on top of the guide rod 3, and the diameter of the end cap 1 being larger than the diameter of the through hole of the guide rod 3 on the magnetic float assembly 2.
Working principle: the end cap 1 is arranged at the top end of the guide rod 3, so that the magnetic float assembly 2 can only float up to the bottom of the end cap 1 at most, the moving range of the magnetic float assembly 2 in the oil tank is limited, and the reliability of the oil tank is improved.
Other portions of this embodiment are the same as any of embodiments 1 to 3 described above, and thus will not be described again.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present invention fall within the scope of the present invention.
Claims (5)
1. A dipstick with a high-reliability sealing structure, which is arranged in a fuel oil tank and penetrates through a lower wall plate (8) of the fuel oil tank, and is characterized by comprising a magnetic float assembly (2), a guide rod (3), an interface cavity (4), a base support (7), an upper first O-shaped ring (9) and a scale rod assembly (13);
the base support (7) is fixedly connected with the lower wall plate (8) of the oil tank through screws, and the upper first O-shaped ring (9) is positioned between the base support (7) and the lower wall plate (8) of the oil tank;
The substrate support (7) is of a hollow structure, and the hollow structure is divided into an interface cavity (4) positioned at the upper end part of the hollow structure and a cylindrical lower cavity opening positioned at the lower end part of the hollow structure;
The guide rod (3) is arranged in the oil tank, the bottom port of the guide rod (3) is in an everting horn shape, and the rubber pad (6) and the bottom port of the guide rod (3) are integrally arranged in the interface cavity (4); the upper port of the interface cavity (4) is an adduction horn shape matched with the bottom port of the guide rod (3);
The magnetic float assembly (2) and the scale bar assembly (13) are provided with magnets which attract each other, wherein the magnetic float assembly (2) is movably arranged outside the guide bar (3) and is attached to the outside of the guide bar (3), and the scale bar assembly (13) passes through a cylindrical lower cavity opening and an interface cavity (4) of the substrate support (7) from the bottom of the lower wall plate (8) of the oil tank and is arranged inside the guide bar (3); also comprises a spring (10); the spring (10) is arranged at the end of the scale bar assembly (13) and forms a self-locking structure with the lower wall plate (8) of the oil tank; the device also comprises a blocking sleeve (11); the blocking sleeve (11) is arranged between the upper end part of the cylindrical lower cavity opening and the scale bar assembly (13), the blocking sleeve (11) is an annular sleeve and is positioned above the spring (10) in the cylindrical lower cavity opening; also comprises a lower second O-ring (12); the lower second O-shaped ring (12) is positioned at the bottom of the port of the interface cavity (4) and fixedly connected with the upper end of the blocking sleeve (11), the diameter of the central hole of the lower second O-shaped ring (12) is the same as the diameter of the scale bar assembly (13), and the radius of the outer ring of the lower second O-shaped ring (12) is the same as the radius of the bottom of the port of the interface cavity (4).
2. A dipstick of high reliability sealing structure according to claim 1 further comprising a rubber strip (5), said rubber strip (5) having a shielding layer and being located between the inner end of the adduction flared upper port of the interface body (4) and the rubber pad (6).
3. A dipstick with a high reliability sealing structure according to claim 1, characterized in that the rubber pad (6) is integrally mounted with the bottom end opening of the guide rod (3), is fixed in the interface cavity (4) by the interface screw thread, and is coated with screw thread glue at the interface screw thread.
4. The dipstick with the high-reliability sealing structure according to claim 1, wherein sealing glue capable of being cured at normal temperature is coated between the interface cavity (4) and the guide rod (3).
5. A dipstick of high reliability seal according to claim 1 further comprising an end cap (1), the end cap (1) being mounted on top of the guide bar (3) and the diameter of the end cap (1) being greater than the diameter of the through hole of the guide bar (3) on the magnetic float assembly (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269791.XA CN112461328B (en) | 2020-11-13 | 2020-11-13 | Dipstick with high-reliability sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269791.XA CN112461328B (en) | 2020-11-13 | 2020-11-13 | Dipstick with high-reliability sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112461328A CN112461328A (en) | 2021-03-09 |
| CN112461328B true CN112461328B (en) | 2024-06-11 |
Family
ID=74825758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011269791.XA Active CN112461328B (en) | 2020-11-13 | 2020-11-13 | Dipstick with high-reliability sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112461328B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB811129A (en) * | 1956-04-24 | 1959-04-02 | Flight Refueling Ltd | Improvements in or relating to devices for measuring the liquid contents of containers |
| GB2051367A (en) * | 1979-06-01 | 1981-01-14 | Kaiser Aerospace & Electronics | Indicating liquid levels |
| US4467647A (en) * | 1982-09-30 | 1984-08-28 | Kaiser Aerospace & Electronics Corporation | Direct reading tank gauge |
| CN204255464U (en) * | 2014-12-11 | 2015-04-08 | 东风汽车电子有限公司 | Fuel sensor assembly |
| CN204881763U (en) * | 2015-09-08 | 2015-12-16 | 宁波海天精工股份有限公司 | Through type liquid level detection device |
| CN213658024U (en) * | 2020-11-13 | 2021-07-09 | 四川泛华航空仪表电器有限公司 | Sealed dipstick |
-
2020
- 2020-11-13 CN CN202011269791.XA patent/CN112461328B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB811129A (en) * | 1956-04-24 | 1959-04-02 | Flight Refueling Ltd | Improvements in or relating to devices for measuring the liquid contents of containers |
| GB2051367A (en) * | 1979-06-01 | 1981-01-14 | Kaiser Aerospace & Electronics | Indicating liquid levels |
| US4467647A (en) * | 1982-09-30 | 1984-08-28 | Kaiser Aerospace & Electronics Corporation | Direct reading tank gauge |
| CN204255464U (en) * | 2014-12-11 | 2015-04-08 | 东风汽车电子有限公司 | Fuel sensor assembly |
| CN204881763U (en) * | 2015-09-08 | 2015-12-16 | 宁波海天精工股份有限公司 | Through type liquid level detection device |
| CN213658024U (en) * | 2020-11-13 | 2021-07-09 | 四川泛华航空仪表电器有限公司 | Sealed dipstick |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112461328A (en) | 2021-03-09 |
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