CN209745503U - Fuel tank leakage test tool - Google Patents

Fuel tank leakage test tool Download PDF

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Publication number
CN209745503U
CN209745503U CN201920848067.9U CN201920848067U CN209745503U CN 209745503 U CN209745503 U CN 209745503U CN 201920848067 U CN201920848067 U CN 201920848067U CN 209745503 U CN209745503 U CN 209745503U
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CN
China
Prior art keywords
fuel tank
sealing
screw rod
air inlet
pressure measuring
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.)
Active
Application number
CN201920848067.9U
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Chinese (zh)
Inventor
张明刚
吕延宾
陈怀宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nantong Huaxia Airplane Engineering Technology Co Ltd
Original Assignee
Nantong Huaxia Airplane Engineering Technology Co Ltd
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Application filed by Nantong Huaxia Airplane Engineering Technology Co Ltd filed Critical Nantong Huaxia Airplane Engineering Technology Co Ltd
Priority to CN201920848067.9U priority Critical patent/CN209745503U/en
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Publication of CN209745503U publication Critical patent/CN209745503U/en
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Abstract

A fuel tank leakage testing tool comprises a filler cap adapter, a sealing cap, a compression nut and a screw rod, wherein one end of the screw rod is provided with threads, and the filler cap adapter and the compression nut are in threaded connection with the threaded end of the screw rod; the sealing port cover is arranged between the oil filler cover adapter and the compression nut and is sleeved at the threaded end of the screw rod; a conical surface is integrally processed on the outer circular surface of the sealing opening cover, and an air inlet hole and a pressure measuring hole are formed in the body of the sealing opening cover; and the air inlet holes and the pressure measuring holes are symmetrically distributed along the axis of the screw rod. Compared with the prior art, the fuel tank leakage testing tool has the advantages that the fuel filler cap adapter extends into the fuel filler opening, the gland nut is rotated to enable the sealing filler cap to seal the fuel filler opening, high-pressure gas is injected into the air inlet hole and is connected with the pressure gauge through the pressure measuring hole, and the pressure of the fuel filler opening is detected; the leakage test tool is simple in structure, convenient to operate, capable of improving test efficiency and low in manufacturing cost.

Description

fuel tank leakage test tool
Technical Field
The utility model relates to an aircraft ground overhauls the equipment field, specifically indicates a fuel tank leakage test instrument.
Background
The fuel tank leakage test tool is a tool for aircraft fuel tank leakage test, and the leakage test tool in the current market is complex in structure, complex to operate and high in price and cost.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, and provide a fuel tank leakage test instrument.
In order to solve the technical problem, the utility model discloses a technical scheme is:
A fuel tank leakage testing tool comprises a filler cap adapter, a sealing cap, a compression nut and a screw rod, wherein one end of the screw rod is provided with threads, and the filler cap adapter and the compression nut are in threaded connection with the threaded end of the screw rod; the sealing port cover is arranged between the oil filler cover adapter and the compression nut and is sleeved at the threaded end of the screw rod; a conical surface is integrally processed on the outer circular surface of the sealing opening cover, and an air inlet hole and a pressure measuring hole are formed in the body of the sealing opening cover; and the air inlet holes and the pressure measuring holes are symmetrically distributed along the axis of the screw rod.
Furthermore, the maximum distance between the end faces of the air inlet hole and the pressure measuring hole is larger than the diameter of the oil port cover adapter, the air inlet hole and the pressure measuring hole are threaded through holes, the air inlet hole is used for being connected with an external air source, and the pressure measuring hole is used for being connected with a detection pressure gauge.
Furthermore, a plurality of convex seats are integrally processed on the outer circular surface of the filler cap adapter, and the positions of the convex seats are matched with the position of a notch of a fuel tank filler cap.
Furthermore, a groove is processed on the thickness surface of the sealing opening cover, and the groove is positioned below the conical surface; a first sealing ring is embedded into the groove.
Furthermore, a second sealing ring is connected in the compression nut.
Compared with the prior art, the fuel tank leakage testing tool has the advantages that the fuel filler cap adapter extends into the fuel filler opening, the gland nut is rotated to enable the sealing filler cap to seal the fuel filler opening, high-pressure gas is injected into the air inlet hole and is connected with the pressure gauge through the pressure measuring hole, and the pressure of the fuel filler opening is detected; the leakage test tool is simple in structure, convenient to operate, capable of improving test efficiency and low in manufacturing cost.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the rotating member of the present invention;
The oil filler cap comprises an oil filler cap adapter 1, an oil filler cap adapter 2, a sealing cap 3, a compression nut 4, a screw rod 5, a sealing ring II 11, a boss 21, a conical surface 22, a groove 23, an air inlet hole 24 and a pressure measuring hole.
Detailed Description
the technical solution in 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.
As shown in fig. 1 and 2, the fuel tank leakage testing tool comprises a filler cap adapter 1, a sealing cap 2, a gland nut 3 and a screw rod 4, wherein an M10 external thread is processed at one end of the screw rod 4, M10 thread through holes are processed at the central positions of the filler cap adapter 1 and the gland nut 2, and the filler cap adapter 1 and the gland nut 2 are screwed at the thread end of the screw rod 4; three convex seats 11 are integrally processed on the outer circular surface of the filler cap adapter 1, and the positions of the convex seats 11 are matched with the position of a notch of a filler cap of a fuel tank.
the sealing port cover 2 is arranged between the oil filler port cover adapter 1 and the compression nut 3, and the sealing port cover 2 is sleeved at the threaded end of the screw rod 4; a conical surface 21 and a groove 22 are integrally formed in the outer circular surface of the sealing opening cover 2, the conical surface 21 is used for limiting the sealing opening cover 2 and a fuel tank filler opening, a first sealing ring is embedded into the groove 22 and connected with the first sealing ring, and the first sealing ring is used for sealing the sealing opening cover 2 and sealing the fuel tank filler opening.
An air inlet hole 23 and a pressure measuring hole 24 are formed in the body of the sealing opening cover 2, in the embodiment, the air inlet hole 23 and the pressure measuring hole 24 are both British standard G1/4 threaded through holes, the air inlet hole 23 is used for being connected with an air source with a pressure reducing valve, and the pressure measuring hole 24 is used for being connected with a detection pressure gauge; the air inlet holes 23 and the pressure measuring holes 24 are symmetrically distributed along the axis of the screw rod 4; in order to ensure that air pressure can enter the fuel tank and be tested to the air pressure, the maximum distance between the end surfaces of the air inlet hole 23 and the pressure measuring hole 24 is larger than the diameter of the oil port cover adapter 1;
In this embodiment, in order to prevent the air pressure from leaking out of the threaded connection, a second seal ring 5 is connected inside the compression nut 3.
the working principle is as follows: after the filler cap of the fuel tank of the airplane is detached, the filler cap adapter 1 penetrates through the filler hole, the filler cap adapter 1 is rotated to enable the boss 11 to clamp the bottom of the filler hole, and the sealing cap 2 is sealed with the filler hole by rotating the compression nut 3; and respectively connecting an air source of the pressure reducing valve with a corresponding hole on the sealing cover 2 from the pressure gauge, opening the pressure reducing valve, slowly pressurizing the oil tank, closing the pressure reducing valve, and judging whether the aircraft fuel tank leaks or not by observing the change of the pressure gauge after the pressure is stabilized within a test requirement range.
The present invention is not limited to the above-described embodiments, and those skilled in the art can make modifications or changes without departing from the spirit of the present invention.

Claims (5)

1. A fuel tank leakage test tool characterized in that: the oil filler cap adapter and the compression nut are in threaded connection with the threaded end of the screw rod; the sealing port cover is arranged between the oil filler cover adapter and the compression nut and is sleeved at the threaded end of the screw rod; a conical surface is integrally processed on the outer circular surface of the sealing opening cover, and an air inlet hole and a pressure measuring hole are formed in the body of the sealing opening cover; and the air inlet holes and the pressure measuring holes are symmetrically distributed along the axis of the screw rod.
2. A fuel tank leak test tool as set forth in claim 1 wherein: the maximum distance between the end faces of the air inlet hole and the pressure measuring hole is larger than the diameter of the oil port cover adapter, the air inlet hole and the pressure measuring hole are threaded through holes, the air inlet hole is used for being connected with an external air source, and the pressure measuring hole is used for being connected with a detection pressure gauge.
3. A fuel tank leak test tool as set forth in claim 1 wherein: a plurality of convex seats are integrally processed on the outer circular surface of the filler cap adapter, and the positions of the convex seats are matched with the position of a notch of a fuel tank filler opening.
4. A fuel tank leak test tool as set forth in claim 1 wherein: a groove is formed in the thickness surface of the sealing opening cover and is positioned below the conical surface; a first sealing ring is embedded into the groove.
5. A fuel tank leak test tool as set forth in claim 1 wherein: and a second sealing ring is connected in the compression nut.
CN201920848067.9U 2019-06-06 2019-06-06 Fuel tank leakage test tool Active CN209745503U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920848067.9U CN209745503U (en) 2019-06-06 2019-06-06 Fuel tank leakage test tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920848067.9U CN209745503U (en) 2019-06-06 2019-06-06 Fuel tank leakage test tool

Publications (1)

Publication Number Publication Date
CN209745503U true CN209745503U (en) 2019-12-06

Family

ID=68723458

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920848067.9U Active CN209745503U (en) 2019-06-06 2019-06-06 Fuel tank leakage test tool

Country Status (1)

Country Link
CN (1) CN209745503U (en)

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