CN112461328A - Oil dipstick with high-reliability sealing structure - Google Patents
Oil dipstick with high-reliability sealing structure Download PDFInfo
- Publication number
- CN112461328A CN112461328A CN202011269791.XA CN202011269791A CN112461328A CN 112461328 A CN112461328 A CN 112461328A CN 202011269791 A CN202011269791 A CN 202011269791A CN 112461328 A CN112461328 A CN 112461328A
- Authority
- CN
- China
- Prior art keywords
- guide rod
- oil tank
- assembly
- dipstick
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 30
- 239000003292 glue Substances 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 36
- 239000000295 fuel oil Substances 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000002828 fuel tank Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
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 dipstick with a high-reliability 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 outside the guide rod, the lower wall plate of the oil tank is inserted into a graduated scale assembly into the guide rod through the base support, the magnetic float assembly and a magnet on the graduated scale assembly control the reading of the graduated rod, in order to ensure the tightness of the oil tank with the graduated rod assembly inserted into the guide rod, a rubber pad, a rubber strip and an O-shaped ring are arranged according to different structural interfaces, the tightness and reliability of a device are increased by filling sealing glue and coating thread glue, and an end cap is arranged at the top of the guide rod to limit the up-and-down floating of the magnetic float assembly, thereby finally realizing the high reliability and tightness of a magnetic float type fuel.
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 float-type fuel tank dipstick with a mature technology is commonly adopted by a dipstick for assisting in measuring fuel quantity of an aircraft, and the dipstick with the structure needs to penetrate through the wall of a fuel tank so as to consider the sealing reliability at the interface of the fuel tank. At present, the sealing of the oil dipstick of the magnetic float type fuel oil tank at the interface is ensured by using O-shaped rings for ensuring the sealing reliability, the service life of the product is determined by the O-shaped rings with the sealing function, the O-shaped rings are easy to age, corrode or lose efficacy due to other reasons, and the product is detached by discharging fuel oil to replace the O-shaped rings. The fuel gauge of the fuel tank requires a longer service life and higher reliability under the condition of greatly prolonged service life of the modern general-purpose aircraft, and the requirement is limited by the service life and reliability of the sealing O-shaped ring.
Disclosure of Invention
The invention provides the dipstick based on the high-reliability sealing structure based on solving the defects of the prior art, and the multiple sealing structures are arranged at the outlet of the dipstick of the magnetic float type fuel oil tank, so that the higher reliability and sealing property of the fuel oil tank are realized, and the service life of the fuel 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, a first O-shaped ring at the upper part 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 positioned at the upper end part of the hollow structure and a cylindrical lower cavity opening positioned at the lower end part;
the guide rod is arranged in the oil tank, the bottom end opening of the guide rod is in an outward-turned horn shape, and the rubber pad and the bottom end opening of the guide rod are arranged in the interface cavity integrally; the upper port of the interface cavity is in an inward-folded 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 mounted outside the guide rod and attached to the outside of the guide rod, and the scale rod assembly penetrates through the cylindrical lower cavity opening and the interface cavity of the base 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 device further comprises a spring, a blocking block sleeve, a second O-shaped ring at the lower part and a rubber strip; the spring is arranged at the end head of the scale rod assembly and forms a self-locking structure with the lower wall plate of the oil tank; the blocking block 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 port of the interface cavity and is fixedly connected with the upper end of the blocking block sleeve, the diameter of a central hole of the lower second O-shaped ring is the same as that of the dial rod assembly, and the radius of an outer ring of the lower second O-shaped ring is the same as that of the bottom of the port of the interface cavity; the rubber strip is provided with a shielding layer and is positioned between the inner end of the upper port of the inward-contraction horn-shaped interface cavity and the rubber pad.
In order to better realize the invention, further, the rubber pad and the bottom port of the guide rod are integrally installed and fixed in the port cavity through port threads, and the port threads are coated with thread glue; and a sealing glue solution capable of being cured at normal temperature is coated between the interface cavity and the guide rod.
In order to better realize the invention, the magnetic suspension assembly further comprises an end cap, wherein the end cap is arranged at the top end of the guide rod, and the diameter of the end cap is larger than that of the guide rod through hole on the magnetic suspension assembly.
Compared with the prior art, the invention has the following advantages and beneficial effects:
has higher reliability and sealing performance.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the base and the lower wall plate of the fuel tank according to the present invention.
Wherein: 1. the oil tank comprises an end cap, a magnetic floater assembly, a guide rod, a connector cavity, a rubber strip, a rubber pad, a base support, an oil tank lower wall plate, an upper first O-shaped ring, a base support, a spring, a block sleeve, a lower second O-shaped ring, a lower block sleeve and.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and therefore should not be considered as a limitation to the scope of protection. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
an oil dipstick with a high-reliability sealing structure is combined with a graph shown in a graph 1 and a graph 2, is arranged in a fuel oil tank and penetrates through a lower wall plate 8 of the fuel oil 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 graduated 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 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;
the guide rod 3 is arranged in the oil tank, the bottom end opening of the guide rod 3 is in an outward-turned horn shape, and the rubber pad 6 and the bottom end opening of the guide rod 3 are integrally arranged in the interface cavity 4; the upper port of the interface cavity 4 is in an inward-folded horn shape matched with the bottom port of the guide rod 3;
the magnetic float assembly 2 and the scale rod assembly 13 are provided with magnets which are attracted with each other, wherein the magnetic float assembly 2 is movably arranged outside the guide rod 3, and the scale rod assembly 13 penetrates through the cylindrical lower cavity opening of the base support 7 and the interface cavity 4 from the bottom of the lower wall plate 8 of the oil tank to be arranged inside the guide rod 3.
The working principle is as follows: set up guide arm 3 in the oil tank, guide arm 3 and basement support 7 fixed connection, wallboard 8 fixed connection under basement support 7 and the oil tank of oil tank, magnetic float sub-assembly 2 of outside swing joint of guide arm 3, wallboard 8 inserts scale bar sub-assembly 13 under the oil tank under the inside of guide arm 3, be provided with the magnet of inhaling mutually in scale bar sub-assembly 13 and the magnetic float sub-assembly 2, magnetic float sub-assembly 2 is along with the lift of oil level is gone up and down in the activity on guide arm 3, and scale bar sub-assembly 13 is inhaled mutually with magnetic float sub-assembly 2 through magnet, go up and down along with the lift of magnetic float sub-assembly 2, be provided with the oil level scale at the lower extreme of scale bar sub-assembly 13, through the lift of scale bar sub-assembly 13 and expose the scale that the position of wallboard 8 corresponds under the oil tank. The upper first O-ring 9 is arranged on the base support 7 and the lower wall plate 8 of the oil tank, so that the sealing performance of the base support and the outlet of the lower wall plate 8 of the oil tank can be improved; set up the rubber pad of installing with bottom mouth an organic whole at the bottom mouth of guide arm 3 and both can avoid the damage of bottom mouth, can also realize the sealed of interface cavity 4 and 3 junctions of guide arm, the leakproofness of oil tank has been strengthened, and the bottom mouth sets up the tubaeform that turns up, and the last port of interface cavity 4 is the tubaeform of adduction, both cooperations, can make guide arm 3 fix in interface cavity 4 more firmly, and the port adduction on interface cavity 4, laminate more with guide arm 3, the gap that the fuel probably flowed in is also more little, and the tubaeform cooperation rubber pad 6 that turns up of interface, make the space in the interface cavity 4 inseparabler.
Example 2:
on the basis of the above embodiment 1, in order to better implement the present invention, as shown in fig. 1 and fig. 2, further, a spring 10, a blocking sleeve 11, a lower second O-ring 12 and a rubber strip 5 are further included; the spring 10 is arranged at the end of the scale rod assembly 13 and forms a self-locking structure with the oil tank lower wall plate 8; the block sleeve 11 is arranged between the upper end part of the cylindrical lower cavity opening and the scale rod assembly 13, and the block 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 block sleeve 11, the diameter of a central hole of the lower second O-shaped ring 12 is the same as that of the graduated rod assembly 13, and the radius of the outer ring of the lower second O-shaped ring 12 is the same as that 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 upper port of the inward-folded horn-shaped interface cavity 4 and the rubber pad 6.
The working principle is as follows: the self-locking structure formed by the spring 10 locks the scale rod assembly 13 in the cylindrical lower cavity above the lower wall plate 8 of the oil tank when the self-locking structure does not work, and unlocks the self-locking structure when the self-locking structure works, so that the scale rod assembly 13 can be exposed out of the lower wall plate 8 of the oil tank and can ascend and descend along with the magnetic float assembly 2. The tightness of the assembly 13 of the scale rod and the cylindrical lower cavity opening can be increased by arranging the blocking block sleeve 11, the lower second O-shaped ring 12 is arranged at the upper end of the blocking block sleeve 11, the effect of fixing the blocking block sleeve 11 can be achieved, and the tightness of the joint of the interface cavity 4 and the cylindrical lower cavity opening and the connecting part of the guide rod 3 can be increased. Simultaneously set up the rubber strip 5 that has the shielding layer between the interior tip of the last port of the adduction tubaeform of interface cavity 4 and rubber pad 6, rubber strip 5 both can guarantee the electric overlap joint between guide arm 3 and interface cavity 4, the basement support 7 to realize and the electrical connection between the oil tank, can also form an extrusion to rubber pad 6, thereby reach better leakproofness.
Other parts of this embodiment are the same as those of embodiment 1, and thus are not 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 port of the guide rod 3, and is fixed in the port cavity 4 by the port thread, and the port thread is coated with a thread glue; and a sealing glue solution capable of being cured at normal temperature is coated between the interface cavity 4 and the guide rod 3.
The working principle is as follows: the guide rod 3 and the interface cavity 4 can be fixed more tightly through the interface threads, so that the reliability of the oil tank is enhanced, and the thread glue solution is coated on the interface threads, so that the sealing performance of the interface is better.
Other parts of this embodiment are the same as any of embodiments 1-2 described above, and thus are not described again.
Example 4:
on the basis of any one of the above embodiments 1-3, in order to better implement the present invention, as shown in fig. 1, further, an end cap 1 is further included, the end cap 1 is installed on the top end of the guide rod 3, and the diameter of the end cap 1 is larger than the diameter of the through hole of the guide rod 3 on the magnetic float assembly 2.
The working principle is as follows: the end cap 1 is arranged at the top end of the guide rod 3, so that the limiting effect can be achieved, the magnetic float assembly 2 can only float 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 parts of this embodiment are the same as any of embodiments 1 to 3, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. A dipstick with a high-reliability sealing structure 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), a first O-shaped ring (9) at the upper part and a graduated 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;
the guide rod (3) is arranged in the oil tank, the bottom end opening of the guide rod (3) is in an outward-turned horn shape, and the rubber pad (6) and the bottom end opening of the guide rod (3) are integrally arranged in the interface cavity (4); the upper port of the interface cavity (4) is in an inward-closing horn shape matched with the bottom port of the guide rod (3);
the magnetic float assembly (2) and the scale rod assembly (13) are provided with magnets which are attracted mutually, wherein the magnetic float assembly (2) is movably mounted outside the guide rod (3) and attached to the outside of the guide rod (3), and the scale rod assembly (13) penetrates through a cylindrical lower cavity opening of the base support (7) and the interface cavity (4) from the bottom of the oil tank lower wall plate (8) and is arranged inside the guide rod (3).
2. The dipstick of a high reliability sealing structure according to claim 1, further comprising a spring (10); the spring (10) is arranged at the end of the scale rod assembly (13) and forms a self-locking structure with the oil tank lower wall plate (8).
3. The dipstick of a high reliability sealing structure according to claim 2, further comprising a choking bush (11); the blocking piece sleeve (11) is arranged between the upper end part of the cylindrical lower cavity opening and the scale rod assembly (13), and the blocking piece sleeve (11) is an annular sleeve and is located above the cylindrical lower cavity opening spring (10).
4. A dipstick of a high reliability sealing structure according to claim 3, further comprising a lower second O-ring (12); the lower portion second O-shaped ring (12) is located at the bottom of a port of the interface cavity (4) and is fixedly connected with the upper end of the blocking block sleeve (11), the diameter of a center hole of the lower portion second O-shaped ring (12) is the same as that of the graduated rod assembly (13), and the radius of an outer ring of the lower portion second O-shaped ring (12) is the same as that of the bottom of the port of the interface cavity (4).
5. The dipstick with the high-reliability sealing structure according to claim 1, further comprising a rubber strip (5), wherein the rubber strip (5) is provided with a shielding layer and is positioned between the inner end of the upper port of the inward-contraction trumpet shape of the interface cavity (4) and the rubber pad (6).
6. The dipstick with the high-reliability sealing structure according to claim 1, characterized in that the rubber gasket (6) is integrally installed with the bottom port of the guide rod (3), fixed in the interface cavity (4) through interface threads, and coated with thread glue.
7. The dipstick with the high-reliability sealing structure according to claim 1, characterized in that a sealing glue solution which can be cured at normal temperature is coated between the interface cavity (4) and the guide rod (3).
8. The dipstick with the high reliability sealing structure according to claim 1, further comprising an end cap (1), wherein the end cap (1) is mounted at the top end of the guide rod (3), and the diameter of the end cap (1) is larger than that of the through hole of the guide rod (3) on the magnetic float assembly (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011269791.XA CN112461328B (en) | 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 | Dipstick with high-reliability sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112461328A true CN112461328A (en) | 2021-03-09 |
| CN112461328B CN112461328B (en) | 2024-06-11 |
Family
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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 |
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 |
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