CN215726574U

CN215726574U - Air tightness detection device

Info

Publication number: CN215726574U
Application number: CN202121967444.4U
Authority: CN
Inventors: 戚晨鑫; 沈云恒; 姬煜琦; 祝磊
Original assignee: Commercial Aircraft Corp of China Ltd; Shanghai Aircraft Manufacturing Co Ltd
Current assignee: Commercial Aircraft Corp of China Ltd; Shanghai Aircraft Manufacturing Co Ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-02-01
Anticipated expiration: 2031-08-20

Abstract

The utility model belongs to the technical field of air tightness tests and discloses an air tightness detection device. The device is used for detecting the gas tightness of wing oil tank, and it includes first sucking disc, the second sucking disc, airtight joint and fastener, and first sucking disc and second sucking disc set up relatively and can adsorb in the both sides of the oil tank mouth of wing oil tank, all are equipped with the connecting hole on first sucking disc and the second sucking disc, and airtight joint is sealed wears to locate the connecting hole and communicates inside the wing oil tank, and the fastener is configured to compress tightly first sucking disc and second sucking disc with the oil tank mouth of sealed wing oil tank on the wing oil tank. The device can avoid taking place gas leakage in the air-tight test process, effectively improves air-tight test's reliability and accuracy, and simple structure, and easy dismounting can shorten air-tight test's preparation cycle and air-tight test after demolish man-hour, has improved work efficiency, has reduced working cost.

Description

Air tightness detection device

Technical Field

The utility model relates to the technical field of air tightness tests, in particular to an air tightness detection device.

Background

The airplane wing is used as a main oil storage mechanism of the airplane and stores fuel oil accounting for 70% -80% of the total oil carried by the airplane, a cavity formed by the airplane wing is a wing oil tank, and if leakage occurs in the wing oil tank, the interior of the airplane is easily affected, so that the operation of the airplane is affected, and therefore before oil supply for the wing oil tank is carried out, air tightness detection needs to be carried out on the wing oil tank.

At present, when the air-tight test is carried out on the wing oil tank, because the structure of the air-tight detection device is not matched with the air inlet, the phenomenon of air leakage often occurs, therefore, a large amount of sealant is required to be coated at the joint of the air-tight detection device and the air inlet before the air-tight test is carried out, the air leakage is avoided, but the solidification period of the sealant is long, and is probably required for 24 hours, the preparation period of the whole air-tight test is greatly prolonged, after the air-tight test is finished, a large amount of time is also required for removing the sealant, the bearing capacity of the sealant is poor, when the pressure in the wing oil tank is overlarge, the phenomenon of secondary air leakage is easy to generate, if the secondary air leakage occurs, after the air pressure of the aircraft oil tank is released, the sealant is sealed again, the working period is prolonged, the working efficiency is also reduced, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

According to one aspect of the present invention, the present invention provides an air-tightness detecting device, which can avoid the phenomenon of air leakage of the air-tightness detecting device due to excessive pressure during air-tightness detection.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an air tightness detection device is used for detecting the air tightness of a wing oil tank and comprises a first sucker, a second sucker, an air tightness joint and a fastener,

the first sucker and the second sucker are oppositely arranged and can be adsorbed on two sides of an oil tank opening of the wing oil tank, connecting holes are formed in the first sucker and the second sucker, the airtight joint is arranged in a sealing mode in a penetrating mode in the connecting holes and communicated with the wing oil tank, and the fastening piece is configured to enable the first sucker and the second sucker to be pressed tightly on the wing oil tank to seal the oil tank opening of the wing oil tank.

Optionally, a groove is formed in one side, facing the second suction cup, of the first suction cup, a protrusion is convexly formed on one side, facing the first suction cup, of the second suction cup, the connecting hole penetrates through the groove and the protrusion, and the protrusion is in sealed insertion connection with the groove.

Optionally, the material of the first suction cup and the second suction cup is rubber.

Optionally, the airtight joint is cylindrical, and an air inlet is formed in the airtight joint and communicated with the wing oil tank.

Optionally, the fastening member is a nut, the airtight connector is provided with an external thread, and the nut is screwed with the airtight connector.

Optionally, a gasket is disposed between the nut and the first suction cup and between the nut and the second suction cup.

Optionally, the gasket is a rubber gasket.

Optionally, the fastening member is a bolt, one of the first suction cup and the second suction cup is provided with a through hole, the other one of the first suction cup and the second suction cup is provided with a blind threaded hole, and the bolt penetrates through the through hole and is in threaded connection with the blind threaded hole.

Optionally, the number of the bolts is four, and the bolts are circumferentially and uniformly arranged on the first suction cup and the second suction cup.

Optionally, the fastening member outside the first suction cup is a nut, the airtight joint is provided with an external thread, the nut is in threaded connection with the airtight joint, the second suction cup is provided with a through hole, one side of the first suction cup facing the second suction cup is provided with a threaded blind hole, and a bolt penetrates through the second suction cup and is in threaded connection with the first suction cup.

The utility model has the beneficial effects that:

wear to establish on first sucking disc and second sucking disc through connecting airtight, and adsorb first sucking disc and second sucking disc on the fuel tank port both sides of wing oil tank through the fastener, can avoid the fuel tank port gas leakage of wing oil tank through the adsorption of sucking disc, and be applicable to the fuel tank port of any shape, and then avoid when carrying out the gas tightness test of wing oil tank, pressure reaches under the certain circumstances, the phenomenon of gas leakage appears, can effectively improve reliability and accuracy that the gas tightness detected, and can not damage the fuel tank port of wing oil tank, above-mentioned gas tightness detection device simple to operate, and is swift, the work cycle has been shortened greatly, and the work efficiency is improved.

Drawings

FIG. 1 is a schematic view of the structure of the airtightness detection apparatus according to the present invention;

FIG. 2 is a schematic structural view of a first chuck of the air tightness detecting device according to the present invention;

FIG. 3 is a schematic structural view of a second chuck of the air tightness detecting device according to the present invention;

fig. 4 is an assembly view of the airtightness detecting apparatus according to the present invention.

In the figure:

100. a first suction cup; 101. a groove; 200. a second suction cup; 201. a protrusion; 300. an airtight joint; 400. a nut; 500. a gasket; 600. a bolt; 700. an oil tank port.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

At present, when the air tightness of the wing oil tank is detected, due to the characteristics of the structure of the existing air tightness detection device, the aging of the device and other reasons, the phenomena of air leakage and loosening frequently occur in the process of carrying out the air tightness test. In order to avoid the emergence of gas leakage phenomenon among the prior art, before carrying out the gas tightness test, coat a large amount of sealed glue parcel and live whole gas tightness detection device, because the setting time of sealed glue is longer, this preparation cycle of having prolonged whole gas tightness test greatly, and the indirect improvement that has leaded to demolising work load after the gas tightness test is accomplished, and adopt the mode of coating sealed glue, under pressure reaches certain condition, the phenomenon of secondary gas leakage takes place easily, if take place secondary gas leakage, then need wait for the wing oil tank to release sealed glue of recoating after the atmospheric pressure, this has not only prolonged duty cycle, still greatly reduced work efficiency, and the working cost is increased.

In view of the above problems, in an embodiment of the present invention, an air-tightness detecting device is provided for detecting air tightness of a wing oil tank, as shown in fig. 1, the air-tightness detecting device includes a first suction cup 100, a second suction cup 200, an air-tight joint 300 and a fastening member, the first suction cup 100 and the second suction cup 200 can be adsorbed at two sides of an oil tank port 700 of the wing oil tank, the first suction cup 100 and the second suction cup 200 are both provided with a connecting hole through which the air-tight joint 300 passes, one end of the air-tight joint 300 extends into the wing oil tank, and the other end is outside the wing oil tank and is used for inflating the wing oil tank during an air-tightness test, and the fastening member is used for compressing the first suction cup 100 and the second suction cup 200 so that the first suction cup 100 and the second suction cup 200 can be adsorbed at the oil tank port 700 of the wing oil tank, thereby avoiding air leakage.

Through adsorbing first sucking disc 100 and second sucking disc 200 in the oil tank port 700 both sides of wing oil tank, wear to locate first sucking disc 100 and second sucking disc 200 with airtight joint 300, and make first sucking disc 100 and second sucking disc 200 tightly adsorb in the oil tank port 700 both sides of wing oil tank through the fastener, can effectively prevent oil tank port 700 gas leakage, and be applicable to the oil tank port 700 of any shape, can improve the reliability and the accuracy of gas tightness detection, the preparation cycle of gas tightness test has been shortened greatly, and above-mentioned gas tightness detection device installation and dismantlement are convenient, swiftly, and then shortened the man-hour of demolising after the gas tightness test is accomplished, and work efficiency is improved, and cost is reduced.

Further, the first suction cup 100 and the second suction cup 200 are respectively attached to two sides of the oil tank port 700 of the wing oil tank, in this embodiment, the oil tank port 700 of the wing oil tank may be in any shape, such as a circular hole, a D-shaped hole, and the oil tank port 700 may be in any size, that is, the first suction cup 100 and the second suction cup 200 in this embodiment can seal the oil tank port 700 in each shape and in various apertures, so as to improve the reliability and accuracy of the airtightness detection of the wing oil tank. As shown in fig. 1, the surface areas of the first suction cup 100 and the second suction cup 200 are larger than the area of the oil tank port 700 of the wing oil tank, so that the oil tank port 700 can be completely covered, and the oil tank port 700 can be sealed.

Preferably, as shown in fig. 2, in an embodiment, a groove 101 may be formed on a side of the first suction cup 100 facing the second suction cup 200, as shown in fig. 3, and a protrusion 201 is formed on a side of the second suction cup 200 facing the first suction cup 100, a connection hole formed on the first suction cup 100 and the second suction cup 200 for the airtight connector 300 to pass through in a sealing manner is formed through the groove 101 and the protrusion 201, and the protrusion 201 can be inserted into the groove 101 in a sealing manner, when the airtight detection device is installed, the protrusion 201 is inserted into the groove 101 in a sealing manner under the action of the airtight fastener, so that the connection hole of the airtight connector and the connection hole of the first suction cup 100 and the second suction cup 200 are better sealed, air leakage at the connection hole is avoided, and reliability and accuracy of the airtight detection are improved.

Further, in this embodiment, the material of the first suction cup 100 and the second suction cup 200 may be rubber, and preferably, the first suction cup 100 and the second suction cup 200 are rubber suction cups made of a flexible material, and the flexible rubber has a certain deformation capability, when the wing surface of the aircraft near the oil tank port 700 is uneven, the first suction cup 100 and the second suction cup 200 made of the flexible rubber can attach the uneven part by self-deformation, thereby ensuring that the oil tank port 700 in any state (uneven surroundings or other situations) can be completely sealed. In one embodiment, the first suction cup 100 and the second suction cup 200 may be circular; in other embodiments, the first suction cup 100 and the second suction cup 200 may be rectangular or have other shapes as long as the first suction cup 100 and the second suction cup 200 can be sucked to both sides of the oil tank port 700.

Further, the airtight joint 300 may be cylindrical, and an air inlet is formed in the airtight joint 300, because one end of the airtight joint 300 extends into the wing oil tank and the other end is outside the wing oil tank, air can be filled into the wing oil tank through the air inlet outside the wing oil tank, and an air tightness test is performed on the wing oil tank.

Preferably, in one embodiment, the fastening member may be a nut 400, an external thread for screwing the nut 400 is provided on the airtight connector 300, the first suction cup 100 and the second suction cup 200 are pressed against the oil tank port 700 by screwing the nut 400 to the airtight connector 300 on both sides of the first suction cup 100 and the second suction cup 200, so that the first suction cup 100 and the second suction cup 200 can be well sucked against the oil tank port 700 without air leakage, and the groove 101 of the first suction cup 100 and the protrusion 201 of the second suction cup 200 are sealingly inserted together by the pressing of the fastening member and the deformation of the first suction cup 100 and the second suction cup 200, so that the airtight connector 300 and the connection hole of the first suction cup 100 and the second suction cup 200 do not air leakage. A sealing gasket 500 may be disposed between the nut 400 and the first suction cup 100 and between the nut 400 and the second suction cup 200, the sealing gasket 500 may increase the contact area between the nut 400 and the first suction cup 100 and between the nut 400 and the second suction cup 200, reduce the pressure of the nut 400 on the surfaces of the first suction cup 100 and the second suction cup 200, avoid the surfaces of the first suction cup 100 and the second suction cup 200 from being damaged, prevent the nut 400 from loosening, and simultaneously improve the sealing performance between the airtight connector 300 and the first suction cup 100 and the second suction cup 200, in this embodiment, the sealing gasket 500 is a rubber gasket.

Further, in another embodiment, the fastening member may also be a bolt 600, a through hole is formed in the first suction cup 100, a threaded blind hole is formed in the opposite position of the second suction cup 200, the bolt 600 penetrates through the through hole in the first suction cup 100 to be in threaded connection with the threaded blind hole in the second suction cup 200, so that an interaction force is generated between the first suction cup 100 and the second suction cup 200, and the first suction cup 100 and the second suction cup 200 are tightly adsorbed at two sides of the oil tank port 700, and after the bolt 600 is connected with the first suction cup 100 and the second suction cup 200, the groove 101 in the first suction cup 100 is in sealed insertion with the protrusion 201 in the second suction cup 200, thereby improving reliability and accuracy of the air-tight test. Of course, the second suction cup 200 may be provided with a through hole, and the first suction cup 100 may be provided with a threaded blind hole, which may be produced according to actual requirements. The through hole is a unthreaded hole, and is convenient to produce and assemble. Preferably, four bolts 600 may be uniformly disposed along the circumferential direction of the airtight connector 300 to apply uniform acting force to each of the first suction cup 100 and the second suction cup 200, so as to ensure the adsorptivity of the first suction cup 100 and the second suction cup 200 to the oil tank port 700 and improve the airtightness of the airtightness detection apparatus.

In other embodiments, as shown in fig. 4, a nut 400 may be provided at the outer side of the first suction cup 100, an external thread for screw-coupling with the nut 400 is provided at a corresponding position of the airtight connector 300, acting force is applied to the first suction cup 100 through the threaded connection of the nut 400 and the airtight connector 300, and simultaneously a through hole is formed in the second suction cup 200, a threaded blind hole is arranged on one side of the first suction cup 100 facing the second suction cup 200, the bolt 600 passes through the through hole and is in threaded connection with the threaded blind hole, acting force is applied to the second suction cup 200 and the first suction cup 100 through the bolt 600, so that the nut 400 and the bolt 600 act simultaneously to ensure that the first suction cup 100 and the second suction cup 200 are tightly adsorbed on the oil tank port 700, air leakage is avoided, the reliability and the accuracy of air tightness detection are ensured, and by the design, if the nut 400 is loosened, the air tightness of the air tightness detection device cannot be influenced. In this embodiment, a gasket 500 may be provided between the nut 400 and the first suction pad 100 to improve the sealing performance between the airtight connector 300 and the first suction pad 100 and prevent the nut 400 from being loosened. Of course, the nut 400 may also be disposed on the outer side of the second suction cup 200, the first suction cup 100 is provided with a through hole, the second suction cup 200 is provided with a threaded blind hole on the side facing the first suction cup 100, and the bolt 600 passes through the through hole to be in threaded connection with the threaded blind hole, and the production may be performed according to actual needs.

The air tightness detection device of the utility model is characterized in that a first suction cup 100 and a second suction cup 200 are closely attached to an oil tank port 700 of a wing oil tank, an air tightness joint 300 is arranged in the first suction cup 100 and the second suction cup 200 in a penetrating way, the wing oil tank can be inflated through the air inlet hole of the airtight joint 300, and the first suction cup 100 and the second suction cup 200 are adsorbed on the oil tank port 700 of the wing oil tank through the fastening piece, so that the phenomenon of air leakage in the process of carrying out the airtight test can be avoided, the air tightness detection device is not influenced by air pressure, secondary air leakage caused by the increase of the pressure in the wing oil tank can be avoided, the reliability and the accuracy of an air tightness test are improved, the air tightness detection device has simple structure and convenient assembly and disassembly, greatly shortens the preparation period of the air tightness test, meanwhile, the dismantling working time after the air tightness test is shortened, the working efficiency is greatly improved, and the working cost is reduced.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An air tightness detection device is used for detecting the air tightness of a wing oil tank and is characterized by comprising a first suction cup (100), a second suction cup (200), an air tightness joint (300) and a fastener,

first sucking disc (100) with second sucking disc (200) set up relatively and can adsorb the both sides of oil tank port (700) of wing oil tank, first sucking disc (100) with all be equipped with the connecting hole on second sucking disc (200), airtight joint (300) are sealed to be worn to locate the connecting hole and intercommunication inside the wing oil tank, the fastener is configured to with first sucking disc (100) with second sucking disc (200) compress tightly in order to seal on the wing oil tank port (700) of wing oil tank.

2. The airtightness detection apparatus according to claim 1, wherein a groove (101) is formed in a side of the first suction cup (100) facing the second suction cup (200), a protrusion (201) is convexly formed on a side of the second suction cup (200) facing the first suction cup (100), the connection hole is formed through the groove (101) and the protrusion (201), and the protrusion (201) is in sealed insertion with the groove (101).

3. The tightness detection device according to claim 1, characterized in that the material of said first suction cup (100) and said second suction cup (200) is rubber.

4. The airtightness detection apparatus according to claim 1, wherein the airtight joint (300) is cylindrical, and an air inlet hole is formed in the airtight joint (300), and the air inlet hole is communicated with the wing oil tank.

5. The airtightness detection apparatus according to claim 1, wherein the fastening member is a nut (400), the airtight connector (300) is provided with an external thread, and the nut (400) is in threaded connection with the airtight connector (300).

6. The tightness detection device according to claim 5, characterized in that a sealing gasket (500) is provided between said nut (400) and said first suction cup (100) and between said nut (400) and said second suction cup (200).

7. The tightness detection device according to claim 6, characterized in that said gasket (500) is a rubber gasket.

8. The tightness detection device according to claim 1, characterized in that said fastening member is a bolt (600), one of said first suction cup (100) and said second suction cup (200) is provided with a through hole, the other is provided with a threaded blind hole, said bolt (600) is threaded through said through hole and said threaded blind hole.

9. The tightness detection device according to claim 8, wherein said bolts (600) are four, and said bolts (600) are circumferentially and uniformly arranged on said first suction cup (100) and said second suction cup (200).

10. The airtightness detection apparatus according to claim 1, wherein the fastening member on the outer side of the first suction cup (100) is a nut (400), the airtight joint (300) is provided with an external thread, the nut (400) is in threaded connection with the airtight joint (300), the second suction cup (200) is provided with a through hole, one side of the first suction cup (100) facing the second suction cup (200) is provided with a blind threaded hole, and a bolt (600) passes through the second suction cup (200) and is in threaded connection with the first suction cup (100).