Locking type metal conduit flexible connection structure

Abstract

The utility model belongs to the technical field of aviation mechanical control, and relates to a locking type metal conduit flexible connection structure which comprises a pipe connection seat, a sealing ring, a pipe joint and a conduit, a plurality of clamping grooves are formed in the end face of the pipe connection seat, buckles matched with the clamping grooves are arranged on the end face, in butt joint with the pipe connection seat, of the pipe joint, and the pipe connection seat and the pipe joint are connected in a matched mode through the clamping grooves and the buckles. According to the utility model, the problem that the assembly between the conduit and the pipe joint seat is affected by manufacturing and mounting errors, so that the conduit and the pipe joint seat are forcibly mounted or cannot be mounted is effectively solved, and meanwhile, the defects of large volume, high weight cost, short service life and the like caused by the use of a flexible rubber pipe are avoided; the weight cost of the aircraft is reduced, the system maintainability is improved, and the flight efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aviation machinery control and relates to a locking type metal conduit flexible connection structure. Background Art

[0002] Aircraft fuel lines are used to supply fuel to the engine, transfer fuel between tanks, and ventilate the fuel tanks. To ensure reliability, fuel lines are typically constructed of aluminum alloy or stainless steel rigid pipes, and are typically sealed with HB4-3 threaded connections to the connectors on the tank siding. However, during the pipe manufacturing process, there are certain manufacturing variations in the pipe bend orientation, and the riveted position of the connectors on the tank siding also has certain assembly variations. As a result, the cumulative errors, such as pipe manufacturing variations and connector assembly position variations, often lead to forced or impossible installation. Therefore, when designing and arranging fuel lines, flexible connections are required to provide axial and radial compensation for the metal pipes during installation. Conventional flexible connections use cloth-reinforced hoses and locking clamps, but these hose-based flexible connections have drawbacks such as bulk, high weight, short lifespan, and frequent maintenance, hindering the layout, installation, and daily use of aircraft fuel systems. Utility Model Content

[0003] The purpose of this utility model is to address the problem of forced or impossible installation in the connection assembly between a metal conduit and a pipe connector, which is often affected by errors in the manufacturing direction of the conduit and errors in the riveting of the pipe connector. This utility model proposes a locking metal conduit flexible connection structure, which effectively solves the problem of forced or impossible installation in the connection assembly between the conduit and the pipe connector due to manufacturing and installation errors. At the same time, it avoids the disadvantages of using flexible hoses, such as large size, high weight cost, and short life, thereby reducing the weight cost of the aircraft, improving system maintainability, and increasing flight efficiency.

[0004] The technical solution of this utility model:

[0005] A locking metal conduit flexible connection structure includes a pipe connector, a sealing ring, a pipe joint, and a conduit. The end face of the pipe connector is provided with a plurality of slots, and the end face of the pipe joint docking with the pipe connector is provided with a buckle matching the slots. The pipe connector and the pipe joint are connected through the slots and the buckle. A sealing ring is provided between the pipe connector and the pipe joint, and the pipe joint is connected to the conduit.

[0006] Furthermore, the pipe connector is riveted to the fuel tank wall panel through the rivet holes on the flange.

[0007] Furthermore, the inner wall of the pipe connector is smooth, and three locking grooves are set on the end face. The end face of the pipe joint connected to the pipe connector is provided with three buckles matching the three locking grooves.

[0008] Furthermore, a sealing ring groove is provided on the outer surface of one end of the pipe joint where the pipe joint and the pipe socket are connected, for installing a sealing ring.

[0009] Furthermore, the sealing ring is an O-ring.

[0010] Furthermore, the pipe joint and the conduit are connected by welding.

[0011] Beneficial effects of the utility model

[0012] The utility model proposes a locking metal conduit flexible connection structure for fuel pipeline connection, which provides certain axial and radial compensation for the metal conduit connection installation, can solve the problem of forced installation or impossible installation caused by assembly error and conduit manufacturing error in the fuel metal pipeline connection, and avoids the problems of large volume, high weight cost, short life and so on caused by the use of flexible rubber hose, thereby reducing the weight cost of the aircraft, improving the system maintainability, and facilitating installation and reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of the pipe connector with locking groove;

[0014] Figure 2 It is a side view of a pipe connector with a locking groove;

[0015] Figure 3 It is a front view of a pipe joint with a bayonet;

[0016] Figure 4 It is a side view of a pipe joint with a bayonet;

[0017] Figure 5 This is an exploded view of the installation of a locking metal conduit flexible connection structure. DETAILED DESCRIPTION

[0018] The connection and assembly between metal conduits and connectors is often affected by manufacturing errors in the conduit and riveting errors in the connector, resulting in forced or impossible installation. This utility model proposes a locking metal conduit flexible connection structure that effectively solves the problem of forced or impossible installation between the conduit and connector due to manufacturing and installation errors. It also avoids the disadvantages of using flexible hoses, such as large size, high weight, and short lifespan, thereby reducing aircraft weight costs, improving system maintainability, and increasing flight efficiency.

[0019] The locking metal conduit flexible connection structure is composed of Figure 5 As shown:

[0020] It includes a pipe connector 1 with a slot, an O-ring 2, a pipe connector 3 with a buckle, and a conduit 4;

[0021] Installation and sealing method:

[0022] The locking metal conduit flexible connection adopts the plug-in sealing form. The pipe joint seat 1 with a slot is riveted to the fuel tank wall through the rivet holes on the flange. The inner wall of the pipe joint seat is smooth and has 3 locking slots. Figure 1-2 As shown. A sealing ring groove is provided on the pipe joint 3 with a buckle, as shown Figure 3-4 , as shown, it is used to install the O-ring 2, the pipe joint 3 with a snap is connected to the conduit 4 by welding, and the pipe joint 3 with a snap is provided with 3 snaps on the outer circumference for assembly with the pipe joint seat with a slot.

[0023] After the conduit 4 is welded to the snap-fit ​​pipe connector 3, the O-ring 2 is placed in the sealing ring groove of the snap-fit ​​pipe connector 3. The snap-fit ​​pipe connector 3 is then inserted into the slotted pipe connector 3 and rotated counterclockwise a certain angle to allow the snap to fit into the slot. The safety hole on the snap-fit ​​pipe connector 3 on the conduit is aligned with the safety hole on the slotted pipe connector 3, and the safety screw is engaged to prevent disengagement. The snap-fit ​​pipe connector 3 and the slotted pipe connector 1 form a piston-type radial seal through the O-ring 2, providing axial and radial compensation during metal conduit connection installation. This can solve the problem of forced or impossible installation caused by assembly errors and conduit manufacturing errors in fuel metal pipeline connections.

[0024] The locking metal conduit flexible connection structure has passed a large number of tests and verifications. The tests show that this flexible connection is easy to install and has a reliable seal. It can solve the problems of forced installation or impossible installation caused by assembly errors and conduit manufacturing errors in fuel metal pipeline connections, and has good maintainability.

Claims

1. A locking metal conduit flexible connection structure, characterized in that: It includes a pipe connector, a sealing ring, a pipe joint, and a catheter. The end face of the pipe connector is provided with a plurality of slots, and the end face of the pipe joint docking with the pipe connector is provided with a buckle matching the slots. The pipe connector and the pipe joint are connected through the slots and the buckle. A sealing ring is provided between the pipe connector and the pipe joint, and the pipe joint is connected to the catheter.

2. The locking metal conduit flexible connection structure according to claim 1, characterized in that: The pipe joint is riveted to the oil tank wall plate through the rivet holes on the flange.

3. The locking metal conduit flexible connection structure according to claim 1, characterized in that: The inner wall of the pipe connector is smooth, and three locking grooves are set on the end face. The end face of the pipe joint connected to the pipe connector is provided with three buckles matching the three locking grooves.

4. The locking metal conduit flexible connection structure according to claim 1, characterized in that: A sealing ring groove is provided on the outer surface of one end of the pipe joint and the pipe socket for mounting a sealing ring.

5. The locking metal conduit flexible connection structure according to claim 1, characterized in that: The sealing ring is an O-type sealing ring.

6. The locking metal conduit flexible connection structure according to claim 1, characterized in that: The pipe joint is connected to the conduit by welding.

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