Rubber seal for aviation kerosene tank

Abstract

The application discloses a rubber sealing device for an aviation kerosene depot, which comprises a sealing ring and a cover body, and further comprises a ring groove arranged in the center of the sealing ring and along the circumferential direction of the sealing ring, a ring-shaped cutout arranged at the inner ring position of the sealing ring, the ring-shaped cutout being communicated with the ring groove, an elastic outer ring arranged at the outer side of the sealing ring and having an arc-shaped piece shape in section, the ring groove providing a space for deformation of the elastic outer ring when the elastic outer ring is deformed under pressure, a groove arranged in the cover body, the sealing ring being sleeved on the groove, the ring-shaped cutout facing the inner side of the groove, the elastic outer ring facing the outer side of the groove, and the groove wall and groove bottom of the groove blocking the ring-shaped cutout, a ring-shaped inner bag air bag being sleeved in the ring groove, an air channel being arranged in the cover body and being provided with a first outlet in the groove, the inner bag air bag being communicated with the first outlet through a quick plug connector, and the air channel being provided with a one-way valve for guiding air flow into the inner bag air bag, so that the sealing protection requirement and the convenient operation requirement of the oil outlet of the depot are met.

Description

Technical Field

[0001] This invention relates to a rubber sealing device, and more specifically, to a rubber sealing device for an aviation kerosene depot. Background Technology

[0002] The oil intake of airport aviation kerosene depots must be equipped with protective manhole covers to prevent dust, rainwater, and external impurities from seeping into the intake, thus ensuring the cleanliness and safety of aviation kerosene storage and retrieval.

[0003] Most existing manhole covers of this type use solid O-rings for sealing. Because the O-ring is a solid structure, it has high rigidity and high compression resistance. During the process of closing the manhole cover, workers need to apply a large amount of squeezing force to press the cover into place, making the installation operation laborious. When opening the cover, the solid sealing ring fits tightly with the well body surface, resulting in high contact friction. Workers need to expend a lot of force to pry the cover open.

[0004] The aforementioned solid sealing structure directly leads to the problem of labor-intensive operation when closing and opening manhole covers. This not only reduces on-site work efficiency, but also easily causes wear and failure of the sealing ring due to long-term heavy disassembly and assembly, shortening the service life of the sealing components. It is difficult to meet both the sealing and protection requirements of oil depot intake ports and the requirements of easy operation. Summary of the Invention

[0005] The purpose of this invention is to provide a rubber sealing device for aviation kerosene depots. The device utilizes an annular groove to create clearance space, reducing the deformation and compressive force of the sealing ring. This simultaneously reduces the contact friction between the sealing ring and the outside when the cover is removed or placed. This reduced contact friction allows workers to easily close and open the manhole cover, minimizing wear on the sealing ring. Furthermore, during deflation, the air bladder contracts, restoring the annular groove's original clearance function, ensuring the sealing ring's handling friction remains consistent with the original design, guaranteeing convenient operation. During inflation, the air bladder expands and pushes the elastic outer ring, actively increasing the contact pressure between the sealing ring and the well wall, significantly improving sealing performance and balancing the sealing and protection requirements of the oil depot's intake port with the need for easy operation.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] A rubber sealing device for an aviation kerosene depot includes a sealing ring and a cover, and further includes: an annular groove, which is formed at the center of the sealing ring and arranged along the circumference of the sealing ring; an annular slit, which is formed at the inner ring position of the sealing ring and communicates with the annular groove; an elastic outer ring, which is arranged on the outer side of the sealing ring and has an arc-shaped sheet cross-section, and the annular groove provides space for deformation when the elastic outer ring is compressed and deformed; a groove, which is formed in the cover; the sealing ring is fitted on the groove, with the annular slit facing the inner side of the groove and the elastic outer ring facing the outer side of the groove, and the groove wall and bottom of the groove sealing the annular slit; an annular inner bladder is fitted inside the annular groove, and an air passage is provided in the cover, with a first outlet in the groove of the air passage, and the inner bladder and the first outlet are connected by a quick-connect connector; the air passage is provided with an inflation nozzle and an exhaust device located on the upper surface of the cover, and the air passage is provided with a one-way valve to guide airflow into the inner bladder.

[0008] Preferably, the thickness of the elastic outer ring gradually increases from the middle to both sides.

[0009] Preferably, the two ends of the elastic outer ring are elastic strips with a rectangular cross-section, and the thickness of the elastic strips is greater than the thickness of the elastic outer ring.

[0010] Preferably, the edges of the elastic strip are rounded.

[0011] Preferably, the inner air bladder is connected to a rubber ring, which is inserted into an annular incision, and there is a gap between the rubber ring and the annular incision. The sub-interface of the quick-connect connector is fixed to the rubber ring.

[0012] Preferably, the annular cut has an annular groove, and the rubber ring has a locking block that engages with the groove.

[0013] Preferably, the inner air bladder has anti-slip ridges on the side facing the elastic outer ring.

[0014] Preferably, the air passage is connected to a branch passage, and a cylinder is installed inside the cover body, with the cylinder and the branch passage connected; the piston rod of the cylinder points to the lock hole on the well wall; when the air passage is filled with air, the piston rod is inserted into the lock hole to lock the cover body; when the air passage is depressurized, the cover body is provided with a reset component that pushes the piston rod to unlock and slide.

[0015] Preferably, the reset element is an elastic element.

[0016] Preferably, the inner air bladder includes an upper air bladder and a lower air bladder. If either the upper or lower air bladder leaks air, the remaining air bladder still maintains its sealing performance. The upper and lower air bladders use two independent sets of air intake pipes and exhaust pipes. The two sets of air intake pipes use the same inflation nozzle for air intake. There are two one-way valves, and the two air intake pipes are arranged accordingly. The two exhaust pipes use the same exhaust component. The exhaust pipe is connected to the downstream position of the corresponding one-way valve.

[0017] In summary, the present invention has at least one of the following beneficial effects:

[0018] 1. The passive sealing performance of the sealing ring still relies on the inherent elastic recovery force of the rubber to seal the well wall, which belongs to the first level of passive sealing. The annular groove of the sealing ring forms a clearance space, which reduces the deformation and squeezing force of the sealing ring. At the same time, it reduces the contact friction between the sealing ring and the outside when the cover is removed. The reduction of contact friction allows workers to easily close and open the manhole cover, reducing the wear of the sealing ring.

[0019] 2. The inflated inner bladder allows the surface contact push to pressurize and adhere to the well wall, forming a secondary active seal. The secondary active seal is far superior to the original simple elastic recovery seal.

[0020] 3. The combination of the inner air bladder and the hollowed-out annular groove of the sealing ring: The "give-off space" of the annular groove is used as the installation and deformation space of the air bladder, breaking the single function of the original annular groove "only to make way for the deformation of the elastic outer ring". This realizes the multi-functional reuse of space. Those skilled in the art cannot directly derive this improvement idea from the original hollowed-out annular groove design. Through the combination design of the inner air bladder and the hollowed-out annular groove, this invention achieves active control of the sealing state for the first time in the field of aviation kerosene depot well cover sealing.

[0021] In the deflated state: the inner bladder contracts, the ring groove restores its original "give way" function, reduces the deformation and pressure of the sealing ring and the contact friction, and workers can easily close and open the cover, reduce the wear of the sealing ring, and solve the problems of laborious operation and short life of the sealing components.

[0022] In the inflation state: the inner bladder expands and pushes the elastic outer ring, so that the elastic outer ring forms a pressurized interference fit with the well wall, upgrading the original simple rubber elastic recovery type "passive seal" to the airbag pushing type "active seal". The sealing effect is far superior to the existing technology, and the sealing performance is stable in the inflation and pressure holding state, which is suitable for the high sealing requirements of aviation kerosene depots.

[0023] Furthermore, in the field of manhole cover sealing, a dual-state switching of "high sealing with air inflation and low friction with air deflation" is achieved: combining air-filled sealing technology with the operational requirements of manhole covers, solving the long-standing technical contradiction in the sealing field that "high sealing inevitably leads to high friction, and low friction inevitably sacrifices sealing performance", and overcoming the technical defect in the existing technology that the sealing performance and ease of operation of manhole cover sealing are strongly negatively correlated.

[0024] It is important to emphasize that in the field of aviation kerosene depots, due to the high-frequency disassembly and assembly of sealing devices during refueling, the sealing devices need to have good sealing performance, durability, and ease of use.

[0025] Pneumatic components can be selected from those with explosion-proof certification. Attached Figure Description

[0026] Figure 1This is a cross-sectional view of the cover fitting over the well wall in the embodiment;

[0027] Figure 2 yes Figure 1 Enlarged view of part A in the image;

[0028] Figure 3 This is a cross-sectional view of one end of the sealing ring in the embodiment;

[0029] Figure 4 This is a schematic diagram of the cover structure in the embodiment. Figure 1 ;

[0030] Figure 5 This is a schematic diagram of the inner bladder structure in the embodiment;

[0031] Figure 6 This is a schematic diagram of the cover structure in the embodiment. Figure 2 ;

[0032] Figure 7 This is a schematic diagram of the airway when the inner bladder is not inflated in the embodiment;

[0033] Figure 8 This is a schematic diagram of the airway after the inner bladder is inflated in the embodiment;

[0034] Figure 9 This is a schematic diagram of the airway connection between the upper and lower airbags in the embodiment;

[0035] Figure 10 This is a schematic diagram of the exhaust component being opened in the embodiment.

[0036] In the picture:

[0037] 1. Sealing ring; 11. Annular groove; 12. Annular notch; 13. Elastic outer ring; 14. Elastic strip; 15. Rounded corner;

[0038] 2. Cover; 21. Groove;

[0039] 3. Well wall;

[0040] 4. Inner air bladder; 41. Rubber ring; 42. Anti-slip ridges;

[0041] 51. Airway; 52. Branch airway;

[0042] 61. Quick-connect connector; 611. Female connector; 612. Female connector; 62. Inflation nozzle; 63. Exhaust assembly; 64. Check valve;

[0043] 81. Card slot; 82. Card block;

[0044] 91. Cylinder; 92. Piston rod; 93. Lock hole; 94. Elastic element; 95. Abutting block; 96. Stop block;

[0045] 401. Upper airbag; 402. Lower airbag; 53. Intake pipe; 54. Exhaust pipe; 01. No. 1 intake pipe; 02. No. 2 intake pipe; 001. Sealing gasket; Detailed Implementation

[0046] The present invention will be further described in detail below with reference to the accompanying drawings.

[0047] Example 1: A rubber sealing device for an aviation kerosene depot, referring to... Figures 1-3 It includes a rubber sealing ring 1, which is annular in shape;

[0048] A central annular groove 11 is formed inside the sealing ring 1, and the annular groove 11 is arranged along the circumference of the sealing ring 1; an annular cut 12 is also arranged along the circumference of the sealing ring 1, and it is formed in the inner ring position of the sealing ring 1, and the annular cut 12 and the annular groove 11 are connected.

[0049] The function of the annular groove 11 is to provide clearance space for the elastic outer ring 13 under pressure deformation, reduce the deformation extrusion pressure, and at the same time retain air to form an elastic buffer, so as to avoid excessive deformation leading to seal failure.

[0050] The elastic outer ring 13 is arranged on the outside of the sealing ring 1, and its cross-section is an arc-shaped sheet. The thickness of the elastic outer ring 13 is designed to gradually increase from the middle to both sides. The thickness of the elastic outer ring 13 in the middle is 1.5mm, and the maximum thickness on both sides is 2mm.

[0051] The two ends of the elastic outer ring 13 are rectangular elastic strips 14, the thickness of which is greater than the thickness of the elastic outer ring 13. In this embodiment, the thickness of the elastic strip 14 is 6 mm. When the elastic outer ring 13 is deformed under pressure, the annular groove 11 provides space for deformation.

[0052] The function of the elastic strip 14 is to provide sealing support for the elastic outer ring 13, improve the wear resistance of the sealing ring, form a surface contact seal with the well wall 3, and enhance the sealing effect.

[0053] The edges of the elastic strip 14 are all provided with rounded corners 15; the radius of the rounded corners 15 is 0.5mm; the function of the rounded corners 15 is to reduce the contact friction between the sealing ring and the groove 21, making it easier to open and close the cover 2, while avoiding stress concentration that could cause the sealing ring to crack and extending its service life.

[0054] The outer wall of the sealing ring 1 is the thinnest, gradually thickening from the outside to the inside to ensure sealing support performance; the inner upper and lower flat ends have increased wall thickness, achieving better sealing and support performance while being stretched; with the sealing ring 1 fitted into the groove as a reference, the outer side faces the well wall, and the inner side faces the bottom of the groove.

[0055] Working principle of the sealing ring: When the cover 2 is tightened, the well wall 3 first applies radial extrusion force to the elastic outer ring 13, then the elastic outer ring 13 deforms radially inward, and then the extrusion force is transmitted to the annular groove 11, compressing the air in the annular groove 11. Then the elastic strip 14 is subjected to the linkage force of the elastic outer ring 13, and generates elastic recovery force in the direction of the well wall 3, so as to achieve the effect of double contact between the elastic strip 14 and the elastic outer ring 13 and the well wall 3.

[0056] Reference Figures 2-4 The cover body 2 has a circular groove 21 on its side; the sealing ring 1 is fitted on the groove 21, the annular cut 12 faces the bottom of the groove 21, and the elastic outer ring 13 faces the outside of the groove 21.

[0057] The groove 21 has a rectangular cross-section, and the outer edge of the elastic strip 14 is fitted to the inside of the groove 21. The groove wall and bottom of the groove 21 are sealed with annular cuts 12.

[0058] The outer edge of the elastic strip 14 contacts and fits against the inner wall of the groove 21, achieving complete sealing of the annular cut 12; the elastic outer ring 13 contacts the well wall 3 with an arc-shaped surface, and the elastic strip 14 contacts the well wall 3 with a rectangular surface, forming a combined contact seal; sealing of the annular cut 12: the bottom of the groove 21 seals the end of the annular cut 12, and the inner wall of the groove 21 seals the side wall of the annular cut 12, so that the annular groove 11 forms a closed deformation space, preventing the sealing medium from entering the annular groove 11.

[0059] The cover 2 is fitted onto the well wall 3 of the aviation kerosene depot. Utilizing the structural characteristics of the cover 2, a sealed space is formed between the sealing ring 1 and the well wall 3 during initial installation. When the cover 2 is tightened, the outer side of the sealing ring 1 is compressed inward, and the space inside the sealing ring 1 is compressed. The greater the compression, the tighter the sealing ring 1 and the wall of the cover 2 fit together, effectively preventing air leakage from the sealed cavity and achieving a sealing effect.

[0060] Further optimization lies in referencing Figure 2 , Figure 3 and Figure 5 The annular inner bladder 4 is fitted inside the annular groove 11. The inner bladder 4 has a circular structure and is connected to an annular rubber ring 41. The inner bladder 4 and the rubber ring 41 are integrally formed. The inner bladder 4 is made of nitrile rubber.

[0061] The inner air bladder 4 is located in the annular groove 11, and the rubber ring 41 is inserted into the annular cut 12. There is a gap between the rubber ring 41 and the annular cut 12. The gap facilitates the installation of the inner air bladder 4 in the annular groove 11 and also allows airflow.

[0062] The quick-connector 61 includes a sub-interface 611 and a female interface 612. The sub-interface 611 is fixed to the rubber ring 41 and communicates with the inner bladder 4. The female interface 612 is installed on the cover 2. The sub-interface 611 is inserted into the female interface 612 to achieve the connection and fixation between the two. The quick-connector 61 for the trachea is a conventional technology. However, it should be further pointed out in this design that the connection of the quick-connector 61 plays a certain limiting role, which restricts the relative sliding of the inner bladder 4 along the circumferential direction of the annular groove 11.

[0063] The inner air bladder 4 has anti-slip ridges 42 on the side facing the elastic outer ring 13. The anti-slip ridges 42 are raised to prevent relative sliding with the inner wall of the elastic outer ring 13 when inflated and pushed, ensuring that the pushing force is evenly transmitted.

[0064] Reference Figure 2 , Figure 3 and Figure 5 The annular cut 12 is provided with an annular groove 81. The groove 81 is set along the circumferential trajectory of the sealing ring 1 and is opened on the elastic strip 14. There are two grooves 81, and the openings of the two grooves 81 are arranged facing each other.

[0065] Correspondingly, the rubber ring 41 is provided with multiple locking blocks 82. The locking blocks 82 are protrusions and are arranged on both sides of the rubber ring 41. When the rubber ring 41 is inserted into the annular cut 12, the locking blocks 82 are engaged in the locking groove 81.

[0066] The engagement relationship between the locking block 82 and the locking groove 81 has the following effects: firstly, it positions the rubber ring 41 into the annular cut 12; secondly, it reduces the relative radial movement of the inner bladder 4 on the sealing ring 1; and thirdly, the gap between the locking blocks 82 ensures that the annular cut 12 meets the clearance requirements.

[0067] Reference Figure 2 , Figures 6-8 The cover 2 is a metal cover. The cover 2 can be drilled to form an internal air passage 51. The air passage 51 has a first outlet in the groove 21. The inner air bladder 4 and the first outlet are connected by a quick connector 61.

[0068] The upper surface of the cover 2 is provided with a recessed groove, in which an inflation nozzle 62 and an exhaust component 63 are installed. The exhaust component 63 is an exhaust valve. The recessed groove design prevents the inflation nozzle 62 and the exhaust component 63 from protruding on the upper surface of the cover 2.

[0069] Both the inflation nozzle 62 and the exhaust component 63 are connected to the air passage 51. The air passage 51 of the inflation nozzle 62 is equipped with a one-way valve 64 that guides the airflow into the inner bladder 4. Therefore, when the inflation nozzle 62 is inflated, the airflow can only enter the air passage 51 and cannot be exhausted outward.

[0070] A sealing plug can be installed on the inflation nozzle 62. When inflation is needed, the sealing plug can be removed. The sealing plug is connected to the cover 2 by a nylon hanging rope to prevent the sealing plug from being lost during outdoor operations.

[0071] The venting component 63 is operated by rotation. When air needs to be released, the user opens the venting component 63, and when the air release is finished, the user closes the venting component 63.

[0072] Product Application Scenarios Adaptation: The inflatable structure meets the sealing and protection requirements of aviation kerosene depots. The core requirements for sealing the oil intake of aviation kerosene depots are to prevent leakage, prevent external impurities / rainwater infiltration, and to be oil-resistant and aging-resistant. The inflatable inner bladder 4 can be made of oil-resistant rubber material, which does not swell or leak when in contact with aviation kerosene. Moreover, the surface contact push after inflation allows the elastic outer ring 13 to form an interference fit with the well wall 3, and the sealing effect is far superior to the original simple elastic recovery fit. At the same time, the pipeline system is integrated on the cover 2, with no exposed vulnerable parts, making it suitable for outdoor use scenarios of airport oil depots.

[0073] Operating Instructions: The inflation / deflation operation is seamlessly integrated with the installation / opening process of the cover 2. The inflation operation is completed after the cover 2 is closed, and the deflation operation is completed before the cover 2 is opened. Only two simple steps are required: "connecting the air pump to the inflation nozzle 62" and "releasing pressure with the depressurization component 63". It does not change the original operating habits of the workers on site, and a portable air pump can be selected for outdoor operations, such as a portable lithium battery mini air pump, which has a low operating threshold.

[0074] Principle Explanation: By switching between inflation and deflation, the annular groove 11 has the dual functions of "giving space" and "sealing pressure regulation space": When deflation occurs, the air bladder contracts, the annular groove 11 restores its original giving function, and the friction of the sealing ring 1 is consistent with the original design, ensuring convenient operation; when inflation occurs, the air bladder expands and pushes the elastic outer ring 13, actively increasing the contact pressure between the sealing ring 1 and the well wall 3, greatly improving the sealing performance, perfectly connecting the advantages of the original design and making up for its shortcomings.

[0075] Example 2, a rubber sealing device for an aviation kerosene depot, differs from Example 1 in that, referring to... Figure 2 , Figure 7 and Figure 8 The cover 2 has a branch channel 52 for airflow. The air channel 51 is connected to the branch channel 52. The end of the branch channel 52 is the second outlet. The second outlet is connected to the cylinder 91. The cylinder 91 is built into and fixed inside the cover 2.

[0076] The piston rod 92 of cylinder 91 can extend and retract from the side of cover 2.

[0077] The well wall 3 has a lock hole 93. When the cover 2 is closed on the well wall 3, the piston rod 92 of the cylinder 91 points to the lock hole 93 of the well wall 3.

[0078] When the air passage 51 is inflated, the piston rod 92 is pushed out and inserted into the locking hole 93 to lock the cover. The purpose is to prevent non-staff members from accidentally opening the cover 2.

[0079] A stop block 95 is fixed on the piston rod 92, and a stop block 96 is fixed on the cover 2. The two ends of the compression spring abut against the stop block 95 and the stop block 96 respectively.

[0080] When the air passage 51 is released, the cylinder 91 loses its air supply. The cover 2 is equipped with an elastic element 94, which is a compression spring, that pushes the piston rod 92 to unlock and slide. The compression spring pushes the piston rod 92 to retract, and the piston rod 92 leaves the lock hole 93. At this time, the mechanical locking relationship between the cover 2 and the well wall 3 is unlocked.

[0081] The advantage of this design is that by utilizing the pressure-holding condition after the airbag is inflated, the piston rod 92, which extends under pneumatic pressure, maintains a stable locked state. Furthermore, after deflation, it automatically unlocks under the elastic force of the compression spring. The unlocking action is the same as the deflation of the airbag, thus completing the locking and unlocking of the cover 2 without adding any additional operations.

[0082] Example 3, a rubber sealing device for an aviation kerosene depot, differs from Example 1 or Example 2 in that, referring to... Figure 9 The inner bladder 4 includes an upper bladder 401 and a lower bladder 402, which are arranged equally vertically and separated by a common diaphragm. Therefore, the outer sides of both the upper and lower bladders provide a sealing effect against the elastic outer ring 13. Even if either the upper or lower bladder 401 ruptures and leaks air, the remaining bladder remains inflated, maintaining good sealing performance against the elastic outer ring 13. This design is intended to prevent damage to the inner bladder 4 along with the elastic outer ring 13 if it is punctured or worn through, causing complete leakage and significantly reducing the sealing performance of the sealing device.

[0083] This design aims to ensure the sealing performance of the inner bladder 4 as much as possible when the inner bladder 4 ruptures and leaks air.

[0084] Specifically, the rubber ring 41 is equipped with two quick-connect fittings 61, which are respectively connected to the No. 1 air intake pipe 01 and the No. 2 air intake pipe 02.

[0085] The first air intake pipe 01 is sealed and inserted into the lower airbag 402 through the rubber ring 41, and the second air intake pipe 02 is sealed and inserted into the upper airbag 401 through the rubber ring 41, thus realizing independent air intake for the lower airbag 402 and the upper airbag 401.

[0086] Fluid flow tends to flow towards low-pressure areas. When one of the lower airbag 402 and the upper airbag 401 has too high an air pressure, resulting in one airbag being full and the other being under-inflated, the airflow will actively flow towards the under-inflated airbag. Therefore, during the inflation phase, the air pressure of the lower airbag 402 and the upper airbag 401 will be at similar values, ensuring that the two airbags maintain a consistent inflation state.

[0087] Two quick-connectors 61 are symmetrically arranged on both sides of the rubber ring 41. Since the rubber ring 41 is elastic, it can be stretched and deformed to fit the two quick-connectors 61 for mating installation.

[0088] The upper airbag 401 and the lower airbag 402 are equipped with two independent air intake pipes 53 and exhaust pipes 54, which are connected to the corresponding quick-connect fittings 61.

[0089] Figure 9 In the middle, an air inlet 62 is still installed on the air passage 51. Two air inlet pipes 53 are installed at the lower end of the air passage 51. Each of the two air inlet pipes 53 is equipped with a one-way valve 64. The two one-way valves 64 are exactly the same model.

[0090] The two air intake pipes 53 are connected to their respective quick-connect fittings 61, thus ensuring air intake for the lower airbag 402 and the upper airbag 401. Furthermore, due to the design of the two one-way valves 64, the airflow from the air intake pipes 53 will not flow back into the air passage 51.

[0091] An exhaust pipe 54 is also connected to the intake pipe 53. Each of the two intake pipes is connected to the corresponding exhaust pipe 54. The exhaust pipe 54 is located downstream of the corresponding one-way valve 64 and is sealed by the exhaust component 63. Therefore, in the inflation state, the airflow will not be discharged through the exhaust pipe.

[0092] The airway 51 is also connected to a branch airway 52.

[0093] During inflation, the one-way valve 64 is opened, and the lower airbag 402 and the upper airbag 401 each take in air. The air pressure in the branch channel 52 also gradually increases. After the piston rod 92 is pushed out, inflation continues until the lower airbag 402 and the upper airbag 401 reach the predetermined air pressure value.

[0094] For exhaust, refer to Figure 9 and Figure 10 ,

[0095] The two exhaust pipes 54 are rigid pipes at the ends and form a circular pipe body; the inside of the circular pipe body is divided into two, and a sealing gasket 001 is provided on the edge of the top of the circular pipe body, and the exhaust component 63 is a threaded sealing cap.

[0096] When the exhaust component 63 is threaded to the end of the two exhaust pipes 54, the cover of the exhaust component 63 presses against the sealing gasket 001, so that both exhaust pipes 54 are sealed, and the ends of the two exhaust pipes 54 are not connected in this sealed state.

[0097] When the exhaust component 63 is opened, the two exhaust pipes 54 directly exhaust air.

[0098] All air intake pipes 53, exhaust pipes 54, and other air pipes are fitted inside the cover 2.

[0099] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A rubber sealing device for an aviation kerosene depot, comprising a sealing ring (1) and a cover (2), characterized in that, it further comprises... include: An annular groove (11) is formed at the center of the sealing ring (1) and arranged along the circumference of the sealing ring (1); An annular cut (12) is made in the inner ring of the sealing ring (1), and the annular cut (12) and the annular groove (11) are connected; an elastic outer ring (13) is arranged on the outside of the sealing ring (1), and its cross-section is an arc-shaped plate. When the elastic outer ring (13) is deformed by pressure, the annular groove (11) provides space for deformation. A groove (21) is formed in the cover (2); The sealing ring (1) is fitted on the groove (21), the annular cut (12) faces the inside of the groove (21), the elastic outer ring (13) faces the outside of the groove (21), and the groove wall and bottom of the groove (21) seal the annular cut (12); The annular groove (11) is fitted with an annular inner bladder (4), and the cover (2) is provided with an air passage (51). The air passage (51) has a No. 1 outlet in the groove (21). The inner bladder (4) and the No. 1 outlet are connected by a quick-connect connector (61). The air passage (51) is provided with an inflation nozzle (62) and an exhaust component (63) located on the upper surface of the cover (2), and the air passage (51) is provided with a one-way valve (64) that guides the airflow into the inner bladder (4).

2. The rubber sealing device for an aviation kerosene depot according to claim 1, characterized in that: The thickness of the elastic outer ring (13) is designed to gradually increase from the middle to both sides.

3. The rubber sealing device for an aviation kerosene depot according to claim 1, characterized in that: The two ends of the elastic outer ring (13) are elastic strips (14) with rectangular cross sections, and the thickness of the elastic strips (14) is greater than the thickness of the elastic outer ring (13).

4. The rubber sealing device for an aviation kerosene depot according to claim 1, characterized in that: The edges of the elastic strip (14) are all rounded (15).

5. The rubber sealing device for an aviation kerosene depot according to claim 1, characterized in that: The inner air bladder (4) is connected to a rubber ring (41), which is inserted into the annular cut (12) and there is a gap between the rubber ring (41) and the annular cut (12). The sub-interface (611) of the quick-connect connector (61) is fixed to the rubber ring (41).

6. The rubber sealing device for an aviation kerosene depot according to claim 5, characterized in that: The annular cut (12) is provided with an annular groove (81), and the rubber ring (41) is provided with a locking block (82) that can be inserted into the groove (81).

7. The rubber sealing device for an aviation kerosene depot according to claim 1, characterized in that: The inner air bladder (4) has anti-slip ridges (42) on the side facing the elastic outer ring (13).

8. The rubber sealing device for an aviation kerosene depot according to claim 1, characterized in that: The air passage (51) is connected to a branch passage (52), and a cylinder (91) is installed inside the cover (2). The cylinder (91) and the branch passage (52) are connected. The piston rod (92) of the cylinder (91) points to the lock hole (93) of the well wall (3); When the air passage (51) is inflated, the piston rod (92) is inserted into the locking hole (93) to lock the cover (2); When the air passage (51) is vented, the cover (2) is provided with a reset element that pushes the piston rod (92) to unlock and slide.

9. The rubber sealing device for an aviation kerosene depot according to claim 8, characterized in that: The reset element is an elastic element (94).

10. The rubber sealing device for an aviation kerosene depot according to claim 5, characterized in that: The inner bladder (4) includes an upper bladder (401) and a lower bladder (402). If either the upper bladder (401) or the lower bladder (402) leaks air, the remaining bladder (402) will still maintain its sealing performance. The upper airbag (401) and the lower airbag (402) use two independent air intake pipes (53) and exhaust pipes (54); The two sets of air intake pipes (53) use the same air inlet (62) for air intake, and there are two one-way valves (64) and two air intake pipes (53) are arranged accordingly; The two exhaust pipes (54) use the same exhaust component (63); The exhaust pipe (54) is connected to the downstream station of the corresponding check valve (64).

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