CN218564659U

CN218564659U - A switching subassembly for aircraft threadless connector seal test

Info

Publication number: CN218564659U
Application number: CN202222317081.0U
Authority: CN
Inventors: 周晖强; 杨盼; 罗辑; 梁勇; 庞伟; 程炜明
Original assignee: Changsha 5712 Aircraft Industry Co ltd
Current assignee: Changsha 5712 Aircraft Industry Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2023-03-03
Anticipated expiration: 2032-08-31

Abstract

The utility model discloses a switching subassembly for aircraft threadless connector sealing test, including switching connector, mount and liner, the hollow tube of switching connector and work end is held for having the switching to the switching, and the periphery cloth of work end has the screw thread, and the mount is used for installing switching connector detachably on threadless connector for the port butt joint of switching connector and threadless connector makes switching connector and threadless connector intercommunication, and the liner is located between threadless connector and the mount and adopts clearance fit. The utility model discloses one set of switching subassembly can not unidimensional no screw nipple of switching, extensive applicability, convenient to use, with low costs, reliability height.

Description

A switching subassembly for aircraft threadless connector seal test

Technical Field

The utility model belongs to the technical field of the aircraft maintenance, especially, relate to aircraft maintenance test part technical field, specifically be a switching subassembly that is used for aircraft threadless connector sealing test.

Background

Aircraft fuel oil system, some annex external joints such as air conditioning system are the unthreaded nipple, and this nipple material connects for the aluminum alloy pipe, there are defects such as yielding, easy fracture, its form is fluted nipple and boss formula nipple, and because this kind of annex is detecting after pulling down, can't directly be connected with ground test equipment, need design a switching anchor clamps, can ensure to connect reliably, do not damage the annex coupling, can ensure again that the test medium does not leak, the leakproofness is good.

The existing aircraft non-threaded connection connector switching clamp is basically in the civil field, is basically connected by a high-hardness or stainless steel pipe, is simple in connection mode, and only consists of a nut, a threaded connector and an embedded material. The shortcoming of this technique is that application scope is less, and is higher to the material requirement of no screw thread nipple, and the pipe wall is generally thicker, but military aircraft portion annex nipple pipe wall all generally all about 1mm, and some nipple pipe walls even 1mm can not arrive, and the material is fragile, and the clamp force of switching anchor clamps is too big easily arouses the deformation, the fracture even, and this nipple directly links to each other with a annex, in case take place to damage, will probably lead to the condemned risk of a annex. Therefore, the switching clamp in the prior art cannot be generally suitable for switching requirements of aircraft accessory nozzles in different fields.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a switching subassembly that is used for aircraft threadless connector sealing test of extensive applicability, good reliability, easy dismounting.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a switching subassembly for aircraft non-thread connector sealing test, includes switching mouth, mount and liner, the switching mouth is for having the hollow tube of switching end and work end, the periphery cloth of work end has the screw thread, the mount is used for installing switching mouth detachably on non-thread connector, makes the port butt joint of switching end and non-thread connector and makes switching mouth and non-thread connector communicate, the liner is located between non-thread connector and the mount.

Foretell a switching subassembly for aircraft unthreaded nipple sealing test, it is preferred, the mount includes clamping part and the first portion of bending that is located clamping part one end, the clamping part is located the periphery of unthreaded nipple, the liner presss from both sides tightly between clamping part and unthreaded nipple, switching end periphery is equipped with the fixed part, first portion of bending can be dismantled with the fixed part and be connected.

Foretell a switching subassembly for aircraft threadless connector sealing test, it is preferred, the one end relative with first bending portion is equipped with the second bending portion of buckling towards threadless connector axle center in the clamping part, the one end and the second bending portion butt of liner, the other end and the annular boss butt of threadless connector periphery.

Preferably, the fixing frame is composed of a plurality of fixing frame segments, and the cross sections of the fixing frame segments are the same.

The aforesaid an adapter assembly for aircraft thread-free connector sealing test, preferred still includes the retaining member, the retaining member is used for strengthening the radial pretightning force between mount, liner and the thread-free connector.

Foretell an adapter assembly for aircraft thread-free connector sealing test, preferred, the retaining member is the annular retaining member, the annular retaining member is used for encircling and hugging closely the mount.

Preferably, the clamping part is a sleeve for sleeving the unthreaded connector, and the inner diameter of the sleeve is larger than or equal to the outer diameter of an annular boss on the unthreaded connector.

The adapter assembly for the aircraft threadless connector sealing test is preferably characterized in that the gasket is composed of at least two gasket segments.

Preferably, the fixing portion and the first bending portion are respectively provided with a plurality of corresponding bolt holes, and bolts penetrate through the bolt holes to be matched with nuts.

Preferably, a groove is formed in the end face of the transfer end and used for embedding a port of the unthreaded nozzle, and sealing gaskets are arranged at the groove and the port of the unthreaded nozzle.

The above switching assembly for the aircraft threadless connector sealing test is preferably characterized in that an arc structure is arranged at one end, abutted against the annular boss, of the gasket, and the arc structure is matched with the annular boss.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses a switching subassembly adopts the mount to compress tightly the liner in the periphery of no screw thread joint nozzle, then will change the port laminating of holding end and no screw thread joint nozzle of joint nozzle and align with the axle center, can dismantle the switching installation that is connected and can realize no screw thread joint nozzle with mount and switching nozzle again. The utility model discloses a set of switching subassembly can not the unidimensional no screw thread connector of switching, because liner shape size easily processes, the liner of corresponding thickness is designed according to the no screw thread connector of different pipe diameter sizes, only need select the liner of supporting thickness for use according to the concrete external diameter size of no screw thread connector during the use can realize the switching demand of different models no screw thread connectors, need not to change switching connector and mount, thereby the time that the switching subassembly chooseed for use has significantly reduced, the cost of one set of switching subassembly of every kind of no screw thread connector design manufacturing has also been saved. And the liner is located between unthreaded nipple and the mount, and the liner has elasticity, can provide better radial pretightning force to the cooperation of unthreaded nipple and mount, can have better buffering guard action to the unthreaded nipple again. Therefore, the utility model discloses a switching subassembly extensive applicability, with low costs, good reliability.

Drawings

Fig. 1 is a schematic view of an assembly of an adapter assembly for a sealing test of an aircraft threadless connector according to an embodiment of the present invention.

Fig. 2 is a schematic diagram illustrating a split of an adapter assembly for a sealing test of an aircraft threadless connector according to an embodiment of the present invention.

Fig. 3 is a schematic view of an end of the fixing frame having the first bending portion of the adapter assembly according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of the holder of fig. 3 taken along line AA.

Fig. 5 is a schematic view of an embodiment of the present invention, wherein the liner has an end with an arc-shaped structure.

Fig. 6 is a cross-sectional view of the liner of fig. 5 taken along line BB.

Illustration of the drawings:

1. a screw-free connector; 11. an annular boss; 2. a transfer nozzle; 21. a transfer end; 22. a working end; 211. a fixed part; 212. a groove; 3. a fixed mount; 31. a clamping portion; 32. a first bending portion; 33. a second bending portion; 34. dividing the fixing frame; 4. A liner; 41. separating the gasket; 42. an arc-shaped mechanism; 5. a locking member; 61. bolt holes; 62. a bolt; 63. a nut; 7. a gasket is provided.

Detailed Description

The present invention will be described in further detail with reference to the following specific embodiments and accompanying drawings.

As shown in fig. 1 and fig. 2, the adapter assembly for the aircraft threadless nozzle sealing test of the embodiment includes an adapter 2, a fixing frame 3 and a gasket 4, the adapter 2 is a hollow tube having an adapter end 21 and a working end 22, threads are distributed on the outer periphery of the working end 22, the fixing frame 3 is used for detachably mounting the adapter 2 on the threadless nozzle 1, so that the adapter end 21 is abutted to a port of the threadless nozzle 1 and the adapter 2 is communicated with the threadless nozzle 1, and the gasket 4 is located between the threadless nozzle 1 and the fixing frame 3.

During the use, the gasket 4 is arranged at the periphery of the non-threaded connector 1 and is tightly pressed by the fixing frame 3, then the transfer end 21 of the transfer connector 2 is attached to the port of the non-threaded connector 1 and is aligned with the axis, then the fixing frame 3 and the transfer connector 2 are detachably connected to realize the transfer installation of the non-threaded connector 1, and before the test, the test conduit is in threaded fit with the working end 22 of the transfer connector 2 to perform an airtight test. Liner 4 is located between unthreaded nipple 1 and the mount 3 and adopts clearance fit, and liner 4 adopts the elastic liner, can provide better radial pretightning force to the cooperation of unthreaded nipple 1 and mount 3, can have better buffering guard action to unthreaded nipple 1 again, and the good reliability. Because the model of aircraft unthreaded nipple is different, the size differs, in the face of the unthreaded nipple 1 of not unidimensional, switching mouth 2 and the mount 3 of this embodiment switching subassembly need not change, only need can realize the switching demand of the unthreaded nipple 1 of different models according to the gasket 4 of the supporting thickness of the concrete external diameter size design of different unthreaded nipples 1, thereby the time that the switching subassembly chooseed for use has significantly reduced, the time of sealed experiment has been shortened, the efficiency of the test is improved, the cost of one set of switching subassembly of each unthreaded nipple design manufacturing has also been saved. Therefore, the switching assembly of the embodiment has the advantages of good reliability, wide applicability and low cost.

In this embodiment, the fixing frame 3 includes a clamping portion 31 and a first bending portion 32 located at one end of the clamping portion 31, the clamping portion 31 is located at the outer periphery of the threadless connector 1, the gasket 4 is clamped between the clamping portion 31 and the threadless connector 1, a fixing portion 211 is arranged at the outer periphery of the adapting end 21, and the first bending portion 32 is detachably connected to the fixing portion 211.

In this embodiment, the holding portion 31 is provided with a second bent portion 33 bent toward the axis of the threadless nozzle 1 at an end opposite to the first bent portion 32, one end of the gasket 4 abuts against the second bent portion 33, and the other end abuts against the annular projection 11 on the outer periphery of the threadless nozzle 1. The second bending part 33 and the annular boss 11 are adopted to clamp the gasket 4 from two ends, and the gasket 4 is axially limited, so that the radial pre-tightening force among the fixing frame 3, the gasket 4 and the unthreaded adapter 1 can be properly reduced due to the matching of the axial force, the reliability of the adapter installation is guaranteed, and the service life of the unthreaded adapter with a thin pipe wall and a brittle pipe wall material is prolonged. The switching subassembly of this embodiment can solve the thin wall pipe diameter well like the problem that the boss formula of aluminum alloy is threadless to connect the mouth yielding, the crackle easily appears. For example, aircraft fuel oil system's unthreaded nipple, this type of nipple be boss formula unthreaded nipple, and it is bigger to compare in the nipple pipe diameter of recess formula, and the pipe wall is thinner a little, and more should protect when designing the switching subassembly, the switching subassembly of this embodiment is particularly useful for this type of nipple. In this embodiment, the circular arc structure 42 is provided at the end of the gasket 4 abutting against the annular boss 11, and the circular arc structure 42 is matched with the annular boss 11, so that the degree of matching between the gasket 4 and the threadless nozzle 1 and the reliability of the overall structure can be further improved.

In this embodiment, the fixing frame 3 is composed of two fixing frame segments 34, and the cross sections of the two fixing frame segments 34 are the same. The split type fixing frame is convenient to disassemble and install, is particularly suitable for the unthreaded connecting nozzle 1 with the periphery provided with the annular boss 11, is convenient to assemble and disassemble, cannot be influenced by the annular boss 11, and ensures that the stress of the gasket 4 and the unthreaded connecting nozzle 1 is more uniform because the cross sections of the fixing frame split pieces 34 are the same, namely, the fixing frame split pieces 34 are symmetrical relative to the central axis. The fixing frame 3 may be integrally formed, and then two symmetrical fixing frame segments 34 may be formed by milling along the line AA, as shown in fig. 3 and 4.

In this embodiment, the adapter assembly further comprises a locking member 5, and the locking member 5 is used for reinforcing the radial pre-tightening force among the fixing frame 3, the gasket 4 and the unthreaded adapter 1.

In this embodiment, the locking member 5 is an annular locking member, and the annular locking member is used for encircling the fastening frame 3 and providing radial pre-tightening force between the two fastening frame fragments 34 and the non-threaded adapter 1, so that the adapter 2 is more firmly fixed, and the circumference of the annular locking member can be adaptively adjusted according to the outer circumference of the fastening frame 3.

In this embodiment, the annular locking member is a band.

Of course, in other embodiments, the locking member 5 can be other members capable of locking the fixing frame sections 34, such as a lock, and the fixed portion and the movable portion of the lock are respectively fixed on the two fixing frame sections 34 and are mutually matched (not shown in the figure).

In this embodiment, the gasket 4 is composed of at least two gasket segments 41, and the split gasket is designed to be more flexible and convenient to assemble and disassemble. The integral liner 4 may be machined and then milled along line BB to form two symmetrical liner segments 41, as shown in fig. 5 and 6.

In this embodiment, the fixing portion 211 and the first bending portion 32 are respectively provided with a plurality of corresponding bolt holes 61, and the bolts 62 are engaged with the nuts 62 through the bolt holes 61. Of course, in other embodiments, the fixing portion 211 and the first bending portion 32 may be detachably engaged.

In this embodiment, the end surface of the transition end 21 is provided with a groove 212, the groove 212 is used for embedding the port of the threadless connector 1, and the arrangement has a radial positioning effect, so that the quick positioning during installation and butt joint is facilitated.

In this embodiment, the elastic sealing gasket 7 is disposed between the port of the threadless connector 1 and the groove 212 during installation, so as to perform buffering and sealing functions, improve the sealing performance of the adapter better, and reduce the risk of damage to the hard connection.

Of course, in other embodiments, the clamping portion 31 may be a sleeve for receiving the threadless connector 1, and the inner diameter of the sleeve is greater than or equal to the outer diameter of the annular boss 11 on the threadless connector 1. When the gasket is installed, the sleeve is firstly sleeved on the unthreaded connector 1, then the gasket 4 is inserted between the sleeve and the unthreaded connector 1, the position is adjusted to align the gasket 4 and the sleeve, and one end of the gasket 4 is tightly matched with the annular boss 11.

The above is only the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above-mentioned embodiments, and the above description describes that the technical features involved in the various embodiments of the present invention can be mutually combined as long as they do not constitute a conflict with each other, all belong to the technical solution under the idea of the present invention. It should be noted that various modifications and decorations can be made by those skilled in the art without departing from the principle of the present invention, and the scope of the present invention should be considered as the protection scope of the present invention.

Claims

1. The switching assembly for the aircraft threadless connector sealing test is characterized by comprising a switching connector (2), a fixing frame (3) and a gasket (4), wherein the switching connector (2) is a hollow pipe with a switching end (21) and a working end (22), threads are distributed on the periphery of the working end (22), the fixing frame (3) is used for detachably mounting the switching connector (2) on the threadless connector (1), so that the switching end (21) is in butt joint with a port of the threadless connector (1) and the switching connector (2) is communicated with the threadless connector (1), and the gasket (4) is located between the threadless connector (1) and the fixing frame (3).

2. The adapter assembly for the aircraft threadless connector sealing test according to claim 1, wherein the fixing frame (3) comprises a clamping portion (31) and a first bending portion (32) located at one end of the clamping portion (31), the clamping portion (31) is located at the periphery of the threadless connector (1), the gasket (4) is clamped between the clamping portion (31) and the threadless connector (1), a fixing portion (211) is arranged at the periphery of the adapter end (21), and the first bending portion (32) is detachably connected with the fixing portion (211).

3. The adapter assembly for the aircraft threadless connector sealing test according to claim 2, wherein an end of the clamping portion (31) opposite to the first bending portion (32) is provided with a second bending portion (33) bending towards the axis of the threadless connector (1), one end of the gasket (4) abuts against the second bending portion (33), and the other end abuts against an annular boss (11) on the periphery of the threadless connector (1).

4. An adapter assembly for aircraft threadless nozzle seal testing according to claim 3, characterized in that the holder (3) is formed by a plurality of holder segments (34), the cross-section of each holder segment (34) being identical.

5. The adapter assembly for the aircraft threadless connector sealing test according to claim 4, characterized by further comprising a locking member (5), wherein the locking member (5) is used for reinforcing the radial pre-tightening force between the fixing frame (3), the gasket (4) and the threadless connector (1).

6. An adapter assembly for aircraft threadless nozzle sealing tests according to claim 5, characterized in that the retaining member (5) is an annular retaining member for embracing the holder (3).

7. Adapter assembly for aircraft threadless connector sealing tests according to claim 2, characterized in that the clamping portion (31) is a sleeve for receiving the threadless connector (1), the inner diameter of the sleeve being equal to or greater than the outer diameter of the annular boss (11) on the threadless connector (1).

8. The adapter assembly for aircraft threadless nozzle seal testing according to any of claims 1 to 7, characterized in that the gasket (4) is composed of at least two gasket segments (41).

9. Adapter assembly for aircraft threadless nozzle seal testing according to any of claims 2 to 7, characterized in that the fixing portion (211) and the first bending portion (32) are provided with a plurality of corresponding bolt holes (61), respectively, through which bolt holes (61) bolts (62) are passed to engage with nuts (63).

10. The adapter assembly for the aircraft threadless connector sealing test according to any one of claims 1 to 7, characterized in that the end face of the adapter end (21) is provided with a groove (212), and the groove (212) is used for embedding a port of the threadless connector (1).