Self-locking connecting structure of aviation pipeline connecting piece

Abstract

The utility model provides a self-locking connecting structure of an aviation pipeline connecting piece, relates to the technical field of aviation pipelines, and aims to solve the technical problem that the aviation pipeline connecting piece in the prior art is time-consuming and troublesome to assemble. A self-locking connecting structure of an aviation pipeline connecting piece comprises a tubular connector and a tubular connecting base, a first matching structure is arranged on the peripheral wall of the connector, a second matching structure matched with the first matching structure is arranged on the end face of the connecting base, and a plurality of mounting grooves are formed in the peripheral wall of the connector at equal intervals in the circumferential direction; a wedge-shaped block is slidably connected in each mounting groove in the radial direction of the connector, a spring is connected between each wedge-shaped block and the bottom face of the corresponding mounting groove, a plurality of limiting grooves corresponding to the wedge-shaped blocks one to one are formed in the inner circumferential wall of the connecting base at equal intervals in the circumferential direction, and a protrusion used for abutting against the end face of the connector is arranged on the inner circumferential wall of the connecting base. When the end face of the connector abuts against the protrusion, the wedge-shaped block is clamped into the limiting groove, and the first matching structure and the second matching structure are in sealed contact.

Description

TECHNICAL FIELD

[0001] The utility model relates to aviation pipeline technical field, specifically is aviation pipeline connecting piece self -lock connection structure. BACKGROUND

[0002] The function of the aviation engine pipeline is to transport fuel, oil, air and engine state control information, and it is an important component of the engine. The engine pipeline is mostly laid in the limited space outside the engine, and needs to meet the requirements of connection and sealing. At the same time, in order to ensure that the engine can work satisfactorily in a wide range of complex conditions, the locking reliability of the pipeline connection needs to be considered.

[0003] At present, the traditional pipeline connecting piece needs to prevent the threaded connection joint from loosening and damaging the sealing structure by using a lock wire. The lock wire locking is designed on the corresponding parts at both ends of the pipeline connecting piece. After the tightening assembly is completed, the lock wire is assembled. This locking anti-loosening structure needs to rely on the lock wire to limit the loosening movement of the nuts at both ends of the joint. The assembly of the lock wire has high requirements. If the assembly direction of the lock wire is incorrect, the lock wire cannot be locked and prevented from loosening. The lock wire cannot be assembled too tightly or too loosely. If the lock wire is too tight, it is easy to break during engine operation. If the lock wire is too loose, it cannot play the corresponding role. Therefore, the assembly of this kind of pipeline connecting piece is time-consuming and troublesome. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the utility model is to provide an aviation pipeline connecting piece self-locking connection structure to solve the technical problem of time-consuming and troublesome assembly of the aviation pipeline connecting piece in the prior art.

[0005] In order to solve the above technical problems, the utility model provides an aviation pipeline connecting piece self-locking connection structure, which comprises a tubular connecting head and a tubular connecting seat arranged coaxially. The outer peripheral wall of the connecting head is provided with a first matching structure, and the end face of the connecting seat is provided with a second matching structure matched with the first matching structure. A plurality of installation grooves are equidistantly arranged on the outer peripheral wall of the connecting head in the circumferential direction. Each installation groove is slidably connected with a wedge-shaped block in the radial direction of the connecting head. Each wedge-shaped block is connected with a spring between the bottom surface of the installation groove. A plurality of limiting grooves corresponding to the wedge-shaped blocks are equidistantly arranged on the inner peripheral wall of the connecting seat in the circumferential direction. The inner peripheral wall of the connecting seat is provided with a protrusion used for abutting against the end face of the connecting head. When the end face of the connecting head abuts against the protrusion, the wedge-shaped block is clamped into the limiting groove, and the first matching structure and the second matching structure form a sealed contact.

[0006] With the above structure, the self-locking connection structure of the aviation pipeline connecting piece has the following advantages: the connecting head and the connecting seat are connected with two pipelines to be connected respectively, the connecting head is inserted into the inner hole of the connecting seat, the wedge-shaped block is retracted after abutting against the inner circumferential wall of the connecting seat, the spring clamps the wedge-shaped block into the limiting groove to complete the connection of the connecting head and the connecting seat when the end face of the connecting head abuts against the protrusion, and the first matching structure and the second matching structure form a sealed contact at this time, so that the sealing between the connecting head and the connecting seat is ensured, and the connecting head and the connecting seat are convenient to connect, the structure after connection is self-locked, and the structure is stable and reliable.

[0007] As an improvement, a plurality of guide blocks corresponding to the wedge-shaped blocks are arranged on the outer circumferential wall of the connecting head at equal intervals in the circumferential direction, and a plurality of guide grooves for inserting the guide blocks are arranged on the inner circumferential wall of the connecting seat at equal intervals in the circumferential direction; with this structure, the guide blocks are inserted into the guide grooves to play a guiding role, so that the wedge-shaped block can be accurately clamped into the limiting groove, and the connection of the connecting head and the connecting seat is more convenient.

[0008] As an improvement, the first matching structure comprises a first annular portion arranged on the outer circumferential wall of the connecting head, the outer circumferential wall of the first annular portion is a tapered surface, and the outer diameter of the first annular portion gradually decreases towards the connecting seat, and the second matching structure comprises a second annular portion arranged on the end portion of the connecting seat and a ring-shaped sealing gasket arranged on the inner circumferential wall of the second annular portion, and the inner circumferential wall of the second annular portion is a tapered surface matched with the outer circumferential wall of the first annular portion; with this structure, the outer circumferential wall of the first annular portion and the inner circumferential wall of the second annular portion are both tapered surfaces, which can form a tighter fit after the connecting head and the connecting seat are connected, thereby improving the sealing performance.

[0009] As an improvement, a plurality of through holes corresponding to the limiting grooves are arranged on the outer circumferential wall of the connecting seat at equal intervals in the circumferential direction, and a top rod capable of sliding radially in the through hole of the connecting seat is detachably connected in each through hole; with this structure, the wedge-shaped block is separated from the limiting groove by the top rod, and the disassembly between the connecting head and the connecting seat is facilitated.

[0010] As an improvement, the utility model also includes a rubber ring, and the rubber ring is detachably sleeved on all the top rods; with this structure, the wedge-shaped block is separated from the limiting groove by each top rod simultaneously by using the rubber ring, and the disassembly between the connecting head and the connecting seat is further facilitated.

[0011] As an improvement, a groove for clamping the rubber ring is arranged on the end face of each top rod away from the connecting seat; with this structure, the stability of the connection between the rubber ring and the top rod is improved, and the disassembly between the connecting head and the connecting seat is further facilitated.

[0012] As an improvement, a sealing plug is threadedly connected in each through hole; with this structure, leakage at the through hole is prevented.

[0013] As an improvement, the through hole comprises a tapered hole, and the sealing plug comprises a tapered portion matched with the tapered hole; by adopting the structure, the sealing effect at the through hole is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic view before the connecting head and the connecting seat are connected in the utility model.

[0015] Figure 2 It is a structure schematic view after the connecting head and the connecting seat are connected in the utility model.

[0016] Figure 3 It is a structure schematic view after the connecting head and the connecting seat are disconnected in the utility model.

[0017] Figure 4 It is a structure schematic view of the connecting head in the utility model.

[0018] Figure 5 It is a structure schematic view of the connecting seat in the utility model.

[0019] The connecting head is 1, the connecting seat is 2, the first cooperation structure is 3, the first annular portion is 31, the second cooperation structure is 4, the second annular portion is 41, the annular sealing gasket is 42, the installation groove is 5, the wedge-shaped block is 6, the spring is 7, the limiting groove is 8, the protrusion is 9, the guide block is 10, the guide groove is 11, the through hole is 12, the tapered hole is 121, the ejector rod is 13, the rubber ring is 14, the recess is 15, the sealing plug is 16, and the tapered portion is 161. DETAILED DESCRIPTION

[0020] The utility model discloses an aviation pipeline connecting piece self-locking connection structure, which comprises a tubular connecting head and a tubular connecting seat arranged coaxially.

[0021] As shown in the drawings, Figures 1 to 5 An aviation pipeline connecting piece self-locking connection structure comprises a tubular connecting head 1 and a tubular connecting seat 2 arranged coaxially, a plurality of installation grooves 5 are equidistantly arranged on the peripheral wall of the connecting head 1 in the circumferential direction, the installation grooves 5 extend along the radial direction of the connecting head 1, a wedge-shaped block 6 is slidably connected in each installation groove 5 along the radial direction of the connecting head 1, a spring 7 is connected between each wedge-shaped block 6 and the bottom surface of the installation groove 5, the inclined surface of the wedge-shaped block 6 is arranged obliquely downward towards the connecting seat 2, a plurality of limiting grooves 8 corresponding to the wedge-shaped blocks 6 are equidistantly arranged on the inner peripheral wall of the connecting seat 2 in the circumferential direction, and a protrusion 9 for abutting against the end face of the connecting head 1 is arranged on the inner peripheral wall of the connecting seat 2; when the end face of the connecting head 1 abuts against the protrusion 9, the wedge-shaped block 6 is clamped into the limiting groove 8.

[0022] In addition, as shown in the drawings, Figure 1As shown, a plurality of guide blocks 10 corresponding to the wedge blocks 6 are equidistantly arranged on the outer peripheral wall of the connector head 1 in the circumferential direction, that is, each guide block 10 is located on the side of the wedge block 6 close to the connector base 2. Figure 5 As shown, a plurality of guide grooves 11 for the insertion of the guide blocks 10 are equidistantly arranged on the inner peripheral wall of the connector base 2 in the circumferential direction, that is, each guide groove 11 is located on the side of the limiting groove 8 close to the connector head 1. When the connector head 1 is inserted into the connector base 2, the guide blocks 10 are first aligned with the guide grooves 11 and then inserted. At this time, the wedge blocks 6 are aligned with the limiting grooves 8, and the guide grooves 11 extend from the end face of the connector base 2 to the protrusions 9.

[0023] In this embodiment, the guide blocks 10 are in a split structure and are fixedly connected to the connector head 1 by bolts or the like. The guide blocks 10 can also limit the outward protrusion of the wedge blocks 6.

[0024] As shown in Figs. 1 and 2, Figure 1 and Figure 2 The outer peripheral wall of the connector head 1 is provided with a first matching structure 3, and the end face of the connector base 2 is provided with a second matching structure 4 matched with the first matching structure 3. The first matching structure 3 includes a first annular portion 31 arranged on the outer peripheral wall of the connector head 1. The outer peripheral wall of the first annular portion 31 is a tapered surface, and the outer diameter of the first annular portion 31 gradually decreases toward the connector base 2. The second matching structure 4 includes a second annular portion 41 arranged on the end portion of the connector base 2 and a ring-shaped sealing gasket 42 arranged on the inner peripheral wall of the second annular portion 41. The inner peripheral wall of the second annular portion 41 is a tapered surface matched with the outer peripheral wall of the first annular portion 31. When the end face of the connector head 1 abuts against the protrusions 9, the wedge blocks 6 are clamped into the limiting grooves 8, and the first matching structure 3 and the second matching structure 4 form a sealed contact.

[0025] The connector head 1 and the connector base 2 are respectively connected to two pipelines to be connected. The existing connection methods such as welding can be used, and thus the details are not described herein. The connector head 1 is inserted into the inner hole of the connector base 2, and the wedge blocks 6 abut against the inner peripheral wall of the connector base 2 and then retract. When the end face of the connector head 1 abuts against the protrusions 9, the springs 7 clamp the wedge blocks 6 into the limiting grooves 8 to complete the connection of the connector head 1 and the connector base 2. At this time, the first matching structure 3 and the second matching structure 4 form a sealed contact. Before the wedge blocks 6 are clamped into the limiting grooves 8, the first annular portion 31 has already abutted against the ring-shaped sealing gasket 42. After the wedge blocks 6 are clamped into the limiting grooves 8, the first annular portion 31 and the ring-shaped sealing gasket 42 are further tightly matched to ensure the sealing between the connector head 1 and the connector base 2. The connection of the connector head 1 and the connector base 2 is convenient, and the structure after connection is self-locked, stable and reliable.

[0026] As shown in Figs. 1 and 2, Figures 1 to 3As shown, a plurality of through holes 12 corresponding to the limiting grooves 8 are equidistantly arranged on the outer circumferential wall of the connecting seat 2 in the circumferential direction, each of the through holes 12 extends along the radial direction of the connecting seat 2 and communicates with the limiting groove 8, and each of the through holes 12 is detachably connected with a jack 13 capable of sliding along the radial direction of the connecting seat 2 in the through hole 12. In addition, a sealing plug 16 is threadedly connected in each of the through holes 12.

[0027] That is, when the connecting head 1 is connected with the connecting seat 2, the sealing plug 16 is connected in the through hole 12, wherein the through hole 12 comprises a tapered hole 121, the sealing plug 16 comprises a tapered portion 161 matched with the tapered hole 121, the cylindrical portion of the sealing plug 16 is threadedly connected with the circular hole portion of the through hole 12, and when the sealing plug 16 is rotated to move into the through hole 12, the tapered portion 161 is tightly matched with the tapered hole 121, as shown. Figure 2

[0028] When it is needed to detach the connecting head 1 from the connecting seat 2, the sealing plugs 16 are first detached, the jacks 13 are inserted into the through holes 12, the wedge-shaped blocks 6 are separated from the limiting grooves 8 by pressing the jacks 13, and then the axial force is applied to the connecting head 1 and the connecting seat 2 to separate them.

[0029] The utility model also includes a rubber ring 14, the rubber ring 14 is detachably sleeved on all jacks 13, the recess 15 for clamping the rubber ring 14 is arranged on each jack 13 and the end face away from the connecting seat 2, after the jack 13 is connected in each through hole 12, the rubber ring 14 is sleeved on all jacks 13, and the elastic force of the rubber ring 14 inwardly tightened cooperates with the extrusion force of the worker manually to make each wedge-shaped block 6 separate from the limiting groove 8.

[0030] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned one embodiment, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.​

Claims

1. An aviation tubing connector self-locking connection structure, characterized in that, The utility model provides a connecting head (1) and tubular connecting seat (2) are arranged coaxially, the outer peripheral wall of connecting head (1) is equipped with first cooperation structure (3), the end surface of connecting seat (2) is equipped with the second cooperation structure (4) with first cooperation structure (3) is adapted, the outer peripheral wall of connecting head (1) is equipped with a plurality of installation slot (5) along the equidistance of circumference, the wedge block (6) is slidably connected along the radial direction of connecting head (1) in each installation slot (5), each wedge block (6) is connected with spring (7) between the bottom surface of installation slot (5), the inner peripheral wall of connecting seat (2) is equipped with a plurality of limit slot (8) with wedge block (6) one to one correspondence along the equidistance of circumference, the inner peripheral wall of connecting seat (2) is equipped with the protrusion (9) for with the end surface of connecting head (1) is resisted, when the end surface of connecting head (1) with protrusion (9) is resisted, wedge block (6) is inserted into limit slot (8) and first cooperation structure (3) and second cooperation structure (4) form sealed contact.

2. The aircraft conduit connection self-locking connection structure according to claim 1, characterized in that, The outer peripheral wall of connecting head (1) is equipped with a plurality of guide block (10) with wedge block (6) one to one correspondence along the equidistance of circumference, the inner peripheral wall of connecting seat (2) is equipped with a plurality of guide slot (11) for the insertion of guide block (10) along the equidistance of circumference.

3. The aircraft conduit connection self-locking connection structure according to claim 1, characterized in that, The first cooperation structure (3) includes the first annular part (31) on the outer peripheral wall of connecting head (1), the outer peripheral wall of first annular part (31) is a tapered surface and the outer diameter of first annular part (31) gradually decreases towards the connecting seat (2), the second cooperation structure (4) includes the second annular part (41) on the end of connecting seat (2) and the annular sealing gasket (42) on the inner peripheral wall of second annular part (41), the inner peripheral wall of second annular part (41) is a tapered surface matching the outer peripheral wall of first annular part (31).

4. The aircraft conduit connection self-locking connection structure according to claim 1, characterized in that, The outer peripheral wall of connecting seat (2) is equipped with a plurality of through holes (12) with limit slot (8) one to one correspondence along the equidistance of circumference, each through hole (12) is detachably connected with a top rod (13) capable of sliding along the radial direction of connecting seat (2) in the through hole (12).

5. The aviation tubing connection self-locking connection structure according to claim 4, characterized in that, It also includes a rubber ring (14) which is detachably sleeved on all the top rods (13).

6. The aviation tubing connection self-locking connection structure according to claim 5, characterized in that, Each top rod (13) has a groove (15) on the end surface away from the connecting seat (2) for clamping the rubber ring (14).

7. The aviation tubing connection self-locking connection structure according to claim 4, characterized in that, Each through hole (12) is threadedly connected with a sealing plug (16).

8. The aviation tubing connection self-locking connection structure according to claim 7, characterized in that, The through hole (12) includes a tapered hole (121), and the sealing plug (16) includes a tapered portion (161) matching the tapered hole (121).

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