Air inlet and outlet connector for air tightness test of aircraft fuel tank

Abstract

The utility model belongs to the technical field of aeronautical manufacturing, and discloses an air inlet and outlet connector for an air tightness test of an aircraft fuel tank, which comprises a supporting plate, a blanking cap and a sealing assembly, and is characterized in that the supporting plate is propped against the inner wall of a fuel tank wall plate and is fixedly connected with the blanking cap through a first fastener; the blanking cap is fixedly connected to the oil tank wall plate through a second fastener so that the overall stability of the connector can be guaranteed. The plug cover is provided with a gas interface, and the gas interface is configured to be connected with a gas detection device so as to be used for an air tightness test. Each first fastener is sleeved with a first sealing ring and abuts against the portion between the first fastener and the oil tank wall plate so as to block the gap between the first fastener and the oil tank wall plate. The second sealing ring abuts between the blanking cap and the outer wall of the fuel tank wall plate, the diameter of the second sealing ring is larger than that of the inlet, the fuel tank inlet is plugged, plugging tightness is guaranteed, fuel tank air leakage is avoided, the one-time passing rate of a test is improved, and the repeated workload of the test is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to aviation manufacturing technical field especially, a kind of inlet and outlet air port joint for aircraft tank air tightness test. BACKGROUND

[0002] To ensure the operation safety of that aircraft, avoid aircraft fuel leakage, air tightness test for verifying the sealing performance of aircraft tank is very important. First, ensure that there is no tank fuel leakage path from the aircraft structure in the aircraft assembly stage, then test the sealing performance of tank structure, lay a good foundation for subsequent overall tank pipeline sealing and fuel injection sealing work.

[0003] Currently, tank air tightness test is communicated by inlet air port joint tooling with external aeration equipment and aeration pipeline, and the structure and service performance of inlet and outlet air port joint have important influence on one-time pass rate of air tightness test. The sealing performance of inlet and outlet air port joint disclosed in prior art is poor, cannot be closely attached to tank wallboard, and also cannot ensure the sealing performance of tank cover, joint is easy to leak, influence one-time pass rate of air tightness test, increase the workload of air tightness test. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of inlet and outlet air port joint for aircraft tank air tightness test, with good sealing performance, can be closely attached to tank wallboard, to effectively improve tank air tightness test one-time pass rate.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Provide a kind of inlet and outlet air port joint for aircraft tank air tightness test, comprising:

[0007] Support plate, abuts to the inner wall of the tank wallboard, multiple first fasteners are arranged on the support plate, multiple inlets for oil injection are arranged on the tank, each first fastener is arranged at the inlet and extends to the outside of the inlet;

[0008] Plug cover, abuts to the outside of the tank wallboard, multiple first connecting holes and multiple second connecting holes are arranged on the plug cover, multiple first fasteners are one by one arranged in multiple first connecting holes, multiple second fasteners are arranged on the tank wallboard, and multiple second fasteners are one by one arranged in multiple second connecting holes;Gas interface is arranged on the plug cover, and the gas interface is configured to be connected with gas detection device;

[0009] The sealing assembly comprises a first sealing ring and a second sealing ring, each of the first fasteners is sleeved with the first sealing ring, and each of the first sealing rings abuts against the inner wall of the oil tank wall plate; the second sealing ring abuts between the plug cover and the outer wall of the oil tank wall plate, and the diameter of the second sealing ring is greater than the diameter of the inlet.

[0010] As an alternative for the inlet and outlet joint for the aircraft fuel tank air tightness test, the side of the support plate facing the inner wall of the oil tank wall plate is provided with a flexible piece, and the flexible piece abuts against the oil tank wall plate.

[0011] As an alternative for the inlet and outlet joint for the aircraft fuel tank air tightness test, the support plate is provided with a mounting groove, and the flexible piece is arranged in the mounting groove.

[0012] As an alternative for the inlet and outlet joint for the aircraft fuel tank air tightness test, the plug cover is provided with an operating handle on the side away from the oil tank wall plate.

[0013] As an alternative for the inlet and outlet joint for the aircraft fuel tank air tightness test, the operating handle is provided with a mounting hole, and the mounting hole is used for mounting a warning piece.

[0014] As an alternative for the inlet and outlet joint for the aircraft fuel tank air tightness test, the outer wall of the operating handle is provided with an anti-skid structure.

[0015] As an alternative for the inlet and outlet joint for the aircraft fuel tank air tightness test, the support plate is in a strip shape.

[0016] As an alternative for the inlet and outlet joint for the aircraft fuel tank air tightness test, the support plate and the plug cover are both made of aluminum alloy material.

[0017] As an alternative for the inlet and outlet joint for the aircraft fuel tank air tightness test, the first sealing ring and the second sealing ring are both made of rubber material.

[0018] As an alternative for the inlet and outlet joint for the aircraft fuel tank air tightness test, the gas interface is provided with a connecting piece, the connecting piece is provided with a connecting thread, and the gas detection device is screwed on the connecting piece.

[0019] The beneficial effects of the utility model are as follows:

[0020] The utility model provides a kind of inlet and outlet gas port joint for aircraft fuel tank air tightness test, support plate is butted on the inner wall of fuel tank wallboard, and is fixedly connected by first fastener with bung;Bung is fixedly connected on fuel tank wallboard by second fastener, to ensure the overall stability of joint. Gas interface is provided on bung, gas interface is configured to be connected with gas detection device, to be used for air tightness test. Every first fastener is sleeved with a first sealing ring, and is butted between first fastener and fuel tank wallboard, to block the gap between first fastener and fuel tank wallboard;Second sealing ring is butted between bung and fuel tank wallboard outer wall, and the diameter of second sealing ring is greater than the diameter of inlet, block fuel tank inlet, ensure the tightness of block, avoid fuel tank leakage, it is favorable to improve the one-time pass rate of air tightness test, reduce the repeated work amount of air tightness test. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is the structure schematic view of the inlet and outlet gas port joint for aircraft fuel tank air tightness test provided in the embodiment of the specific embodiment of the utility model;

[0022] Fig. 2 It is the structure schematic view of another orientation of the inlet and outlet gas port joint for aircraft fuel tank air tightness test provided in the embodiment of the specific embodiment of the utility model;

[0023] Fig. 3 It is the explosion view of the inlet and outlet gas port joint for aircraft fuel tank air tightness test provided in the embodiment of the specific embodiment of the utility model.

[0024] In the drawing:

[0025] 1, support plate;11, first fastener;111, first nut;112, second nut;12, flexible member;

[0026] 2, bung;21, first connecting hole;22, second connecting hole;23, gas interface;24, operating handle;

[0027] 3, second fastener;31, third nut;32, gasket;

[0028] 4, sealing assembly;41, first sealing ring;42, second sealing ring;43, third sealing ring;

[0029] 5, connecting piece. DETAILED DESCRIPTION

[0030] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0031] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] In the description of the embodiment, the terms "up", "down", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0034] The technical scheme of the utility model will be further explained below in combination with the drawings and through specific embodiments.

[0035] As Figs. 1 to 3As shown, this embodiment provides an inlet / outlet connector for an aircraft fuel tank airtightness test, including a support plate 1, a plug 2, and a sealing assembly 4. The support plate 1 abuts against the inner wall of the fuel tank wall panel, and multiple first fasteners 11 are provided on the support plate 1. The fuel tank has an inlet for fuel injection, and each first fastener 11 is inserted at the inlet and extends to the outside of the inlet. The plug 2 abuts against the outside of the fuel tank wall panel, and the plug 2 has multiple first connecting holes 21 and multiple second connecting holes 22. The multiple first fasteners 11 are inserted one-to-one into the multiple first connecting holes 21 to achieve a fixed connection between the support plate 1 and the plug 2. Multiple second fasteners 3 are provided on the fuel tank wall panel, and the multiple second fasteners 3 are inserted one-to-one into the multiple second connecting holes 22 to fix the plug 2 to the fuel tank wall panel, ensuring the overall stability of the connector. The plug 2 is provided with a gas interface 23, which is configured to connect to a gas detection device for airtightness testing. The sealing assembly 4 includes a first sealing ring 41 and a second sealing ring 42. Each first fastener 11 is fitted with a first sealing ring 41, and each first sealing ring 41 abuts against the inner wall of the tank wall to seal the gap between the tank wall and the first fastener 11. The second sealing ring 42 abuts against the plug 2 and the outer wall of the tank wall, and the diameter of the second sealing ring 42 is larger than the diameter of the inlet. While sealing the tank inlet, it ensures the tightness of the seal and avoids air leakage. This helps to improve the first-pass rate of the airtightness test and reduce the amount of repetitive work in the airtightness test.

[0036] Specifically, both the first fastener 11 and the second fastener 3 are bolts, and there are two of each. In other embodiments, there may be multiple first fasteners 11 and second fasteners 3, which is not specifically limited here.

[0037] Specifically, such as Fig. 3 As shown, in this embodiment, each first fastener 11 is fitted with a first nut 111 and a second nut 112. The first nut 111 is screwed onto the first fastener 11 and abuts against the support plate 1 to achieve a fixed connection between the first fastener 11 and the support plate 1. The second nut 112 is screwed onto the first fastener 11 and abuts against the side of the plug 2 opposite to the support plate 1 to achieve a fixed connection between the first fastener 11 and the plug 2, and simultaneously fixes the relative position between the support plate 1 and the plug 2. Specifically, a third sealing ring 43 is also fitted onto the first fastener 11, and the third sealing ring 43 abuts between the second nut 112 and the plug 2 to ensure the sealing at the connection between the first fastener 11 and the plug 2. Exemplarily, the third sealing ring 43 is made of rubber material.

[0038] Continue to refer to Fig. 3The third nut 31 and the gasket 32 are sleeved on the second fastener 3, the gasket 32 abuts against the side of the plug cover 2 away from the support plate 1, and the third nut 31 is screwed on the second fastener 3 and abuts against the gasket 32, thereby ensuring the stability of the plug cover 2 fixed on the oil tank wall plate.

[0039] Optionally, the support plate 1 is in a strip shape, which saves material and reduces the weight of the support plate 1, facilitating the installation and transportation of the joint. In addition, the thickness of the support plate 1 is relatively small, and the specific thickness can be set according to actual conditions, which is not limited here.

[0040] Optionally, the support plate 1 and the plug cover 2 are made of aluminum alloy material, which has low density, light weight, and high strength, and can further reduce the overall weight of the joint.

[0041] Optionally, the first sealing ring 41 and the second sealing ring 42 are made of rubber material, which has good sealing performance, ensures reliable sealing effect, and has relatively low manufacturing cost and good economic efficiency.

[0042] Optionally, the connection piece 5 is arranged at the gas interface 23, the connection piece 5 is provided with a connection thread, and the gas detection device is screwed on the connection piece 5, which is simple and convenient to operate and is conducive to improving the test efficiency.

[0043] Specifically, the gas detection device is a device in the prior art, and the specific structure and principle thereof refer to the prior art, which is not described here.

[0044] Optionally, the side of the support plate 1 facing the inner wall of the oil tank wall plate is provided with a flexible piece 12, which abuts against the oil tank wall plate to avoid wear of the oil tank wall plate. Specifically, in the embodiment, the flexible piece 12 is a rubber pad.

[0045] Further, the support plate 1 is provided with a mounting groove, and the flexible piece 12 is arranged in the mounting groove, which can reduce the weight of the support plate 1 and facilitate the installation of the flexible piece 12. Specifically, the flexible pad is bonded in the mounting groove.

[0046] Optionally, the side of the plug cover 2 away from the oil tank wall plate is provided with an operating handle 24 to facilitate the test personnel to hold the cover plate. Specifically, in the embodiment, the operating handle 24 is provided with two; in other embodiments, the number of operating handles 24 can be set as needed, which is not limited here.

[0047] Specifically, the operating handle 24 is detachably arranged on the plug cover 2, which facilitates the overall assembly of the joint.

[0048] Further, the operating handle 24 is provided with a mounting hole for mounting a warning member to warn other operators that the oil tank is being tested for air tightness, prevent mistaken touch and ensure smooth testing.

[0049] Optionally, the outer wall of the operating handle 24 is provided with an anti-skid structure. Specifically, the anti-skid structure is an anti-skid pad such as a rubber pad provided on the outer wall of the operating handle 24, or the anti-skid structure is an anti-skid protrusion provided on the outer side of the operating handle 24, which can be a point protrusion or a protrusion with any shape of texture, and the function of the anti-skid protrusion is to increase the frictional force between the operating handle 24 and the tester's hand. The specific form thereof can refer to the prior art, and is not specifically limited in the embodiment, as long as it can increase the friction.

[0050] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. An inlet-outlet port fitting for aircraft fuel tank airworthiness testing, characterized in that, The utility model relates to an oil tank wall plate sealing device, including: Supporting plate (1) is in abutment to the oil tank wall plate inner wall, a plurality of first fastener (11) are arranged on the supporting plate (1), the oil tank is provided with the import for filling oil, each first fastener (11) is arranged at the import, and extends to the outside of the import; Plug cover (2) is in abutment to the oil tank wall plate outside, a plurality of first connecting hole (21) and a plurality of second connecting hole (22) are formed in the plug cover (2), a plurality of first fastener (11) are correspondingly arranged in a plurality of first connecting hole (21), a plurality of second fastener (3) are arranged on the oil tank wall plate, and a plurality of second fastener (3) are correspondingly arranged in a plurality of second connecting hole (22);Gas interface (23) is arranged on the plug cover (2), and the gas interface (23) is configured to be connected with gas detection device; Sealing assembly (4) includes first sealing ring (41) and second sealing ring (42), each first fastener (11) is sleeved with a first sealing ring (41), and each first sealing ring (41) is in abutment to the oil tank wall plate inner wall;Second sealing ring (42) is in abutment between the plug cover (2) and the oil tank wall plate outer wall, and the diameter of the second sealing ring (42) is greater than the diameter of the import.

2. The access port fitting for aircraft fuel tank integrity testing of claim 1, wherein, The side of the supporting plate (1) facing the inner wall of the oil tank wall plate is provided with a flexible member (12), and the flexible member (12) is in abutment to the oil tank wall plate.

3. An access fitting for aircraft fuel tank integrity testing according to claim 2, wherein, The supporting plate (1) is provided with a mounting groove, and the flexible member (12) is arranged in the mounting groove.

4. The access fitting for aircraft fuel tank integrity testing of claim 1, wherein, The side of the plug cover (2) away from the oil tank wall plate is provided with an operating handle (24).

5. An access fitting for aircraft fuel tank integrity testing according to claim 4, wherein, The operating handle (24) is provided with a mounting hole for mounting a warning member.

6. The access fitting for aircraft fuel tank integrity testing of claim 4, wherein, The outer wall of the operating handle (24) is provided with an anti-slip structure.

7. The access port fitting for airworthiness testing of aircraft fuel tanks of any of claims 1-6, wherein, The supporting plate (1) is in the form of a strip.

8. The access port fitting for airworthiness testing of aircraft fuel tanks of any of claims 1-6, wherein, The supporting plate (1) and the plug cover (2) are made of aluminum alloy material.

9. The access port fitting for airworthiness testing of aircraft fuel tanks of any of claims 1-6, wherein, The first sealing ring (41) and the second sealing ring (42) are made of rubber material.

10. The access port fitting for airworthiness testing of aircraft fuel tanks of any of claims 1-6, wherein, A connecting member (5) is arranged at the gas interface (23), and the connecting member (5) is provided with a connecting thread, and the gas detection device is screwed on the connecting member (5).

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