A method for quickly repairing aircraft hydraulic pipelines

Abstract

A method for quickly repairing aircraft hydraulic pipelines, which repairs the damaged parts by replacing the mode, and uses radial extrusion series components or axial extrusion series components to complete the assembly of the replacement parts and the original machine pipeline; the radial extrusion series components include double-headed radial extrusion joints and single-headed light radial extrusion joints, and the axial extrusion series components include double-headed axial extrusion joints and single-headed light axial extrusion joints; the double-headed radial extrusion joints and double-headed axial extrusion joints realize the connection of two conduits through extrusion deformation at both ends; the single-headed light radial extrusion joints and single-headed light axial extrusion joints have an extrudable and deformable structure at one end and a fastening connection structure at the other end, and a threading nut that matches the original machine pipeline joint is provided at one end of the fastening connection structure. The present invention solves the problems of long transportation distance and long repair cycle of accessories provided by pipeline manufacturers, and achieves the purpose of improving work efficiency and reducing comprehensive costs.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft maintenance, and in particular to a method for quickly repairing damaged aircraft hydraulic system pipelines. Background Art

[0002] During the service of an aircraft, the pipes in its hydraulic system are prone to damage such as cracks and leakage. Since the specifications of aircraft hydraulic pipes are diverse, the shapes and lengths of different sections are different, and the damage locations are random, if spare pipes are made in advance, theoretically, each aircraft needs to reserve at least a complete set of pipes of the same number and specifications, which has the disadvantage of high manufacturing and reserve costs.

[0003] At present, the commonly used method for repairing damaged aircraft hydraulic system pipelines is: first send the damaged pipeline information to the pipeline manufacturer, and the manufacturer will manufacture pipelines of the same specifications based on the damaged pipeline digital model; then send the manufactured pipelines to the aircraft docking station, remove the damaged pipelines, and then replace them with new ones. However, because the aircraft docking station and the pipeline manufacturer are often not in the same area, the transportation distance is long, resulting in a long repair process and high comprehensive cost. Summary of the invention

[0004] The present invention provides a method for quickly repairing aircraft hydraulic pipelines, which aims to repair different damaged sections of hydraulic pipelines through a series of components with standardized structures, so as to solve the problems of long transportation distance and long repair cycle of accessories provided by pipeline manufacturers, thereby achieving the purpose of improving work efficiency and reducing comprehensive costs.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: A method for quickly repairing an aircraft hydraulic pipeline, for different damaged positions of the aircraft hydraulic pipeline, is repaired by locally replacing the damaged position, and a radial extrusion series assembly or an axial extrusion series assembly is used to complete the connection and assembly of the replacement part and the original machine pipeline, wherein the radial extrusion series assembly is used for repairing the pipeline with a hydraulic system pressure below 21MPa, and the axial extrusion series assembly is used for repairing the pipeline with a hydraulic system pressure below 35MPa; the radial extrusion series assembly includes a double-headed radial extrusion joint and a single-headed light radial extrusion joint, and the axial extrusion series assembly includes a double-headed axial extrusion joint and a single-headed light axial extrusion joint; the double-headed radial extrusion joint and the double-headed axial extrusion joint are both left-right symmetrical structures, and the connection of two conduits of the hydraulic pipeline is realized by extrusion and deformation at both ends; one end of the single-headed light radial extrusion joint and the single-headed light axial extrusion joint is an extrudable and deformable structure, and the other end is a fastening connection structure, which is used to realize the connection of the conduit of the hydraulic pipeline with the original machine pipeline joint, and a threading nut matching the original machine pipeline joint is provided at one end of the fastening connection structure.

[0006] In the above-mentioned aircraft hydraulic pipeline rapid repair method, in the single-head light radial extruded joint and the single-head light axial extruded joint used therein, the threading nut includes a nut body and a steel wire; the nut body is provided with a limiting portion and a threaded connection portion, an annular limiting groove is provided on the inner side wall of the limiting portion, and a through hole tangentially connected to the annular limiting groove is provided on the outer wall of the limiting portion; the steel wire is inserted into the annular limiting groove through the through hole of the limiting portion to form a limiting ring that cooperates with one end of the fastening connection structure in the single-head light radial extruded joint and the single-head light axial extruded joint.

[0007] The above-mentioned aircraft hydraulic pipeline rapid repair method adopts a double-head radial extruded joint including a radial extruded pipe sleeve and a sealing ring; the radial extruded pipe sleeve is a left-right symmetrical structure, and an annular sealing groove is provided on its inner wall. The outer surfaces of the left and right ends of the radial extruded pipe sleeve are conical surfaces, and the outer surface of the middle part is a cylindrical surface. An annular groove is provided between the conical surfaces at the left and right ends and the cylindrical surface at the middle part. A plurality of cut surfaces are formed by removing materials on the conical surfaces at the left and right ends and on the transition surfaces between the conical surfaces and the annular groove. The cut surfaces are planes uniformly arranged along the circumference of the radial extruded pipe sleeve and parallel to its axial center axis; the sealing ring is embedded in the annular sealing groove on the inner wall of the radial extruded pipe sleeve.

[0008] In the above-mentioned aircraft hydraulic pipeline rapid repair method, in the single-head light radial extruded joint it adopts, one end of its radially extrudable deformable structure is the same as the left or right structure of the double-head radial extruded joint, the inner hole diameter size of the radial extruded pipe sleeve at one end of the fastening connection structure matches the inner diameter size of the connected conduit, and an annular groove is provided on the outer side wall of the radial extruded pipe sleeve, and the side wall of the annular groove is a first arc surface that matches the outer surface of the steel wire of the threading nut.

[0009] The above-mentioned aircraft hydraulic pipeline rapid repair method adopts a double-headed axially extruded joint including an axially extruded pipe sleeve and an axially extruded ring; the axially extruded pipe sleeve is a left-right symmetrical structure, and at least two extrusion deformation energy absorption ring grooves are arranged on its inner wall; the axially extruded ring sleeve is arranged outside the axially extruded pipe sleeve, and an extrusion contact surface is arranged on the inner wall of the axially extruded ring and the outer wall of the axially extruded pipe sleeve, and the extrusion contact surface is a stepped arc surface.

[0010] In the above-mentioned aircraft hydraulic pipeline rapid repair method, in the single-head light-weight axially extruded joint it adopts, one end of the axially extruded deformation structure is the same as the left or right structure of the double-head axially extruded joint, the inner hole diameter size of the axially extruded pipe sleeve at one end of the fastening connection structure matches the inner diameter size of the connected conduit, and an annular groove is provided on the outer side wall of the axially extruded pipe sleeve, and the side wall of the annular groove is a second arc surface that matches the outer surface of the steel wire of the threading nut.

[0011] The above-mentioned aircraft hydraulic pipeline rapid repair method, when repairing the damage of the joint area in the aircraft hydraulic pipeline, uses a single-head light radial extrusion joint or a single-head light axial extrusion joint, removes the fastening nut and the connecting sleeve at one end of the original machine pipeline joint connected to the damaged conduit, cuts off and removes the conduit at the damaged part, connects one end of the extrudable and deformable structure in the single-head light radial extrusion joint or the single-head light axial extrusion joint to the original machine conduit, and assembles one end of the fastening connection structure with the connecting seat of the original machine pipeline joint.

[0012] The above-mentioned aircraft hydraulic pipeline rapid repair method, when repairing damage in the area near the joint in the aircraft hydraulic pipeline, adopts a single-head light radial extrusion joint or a single-head light axial extrusion joint and a double-head radial extrusion joint or a double-head axial extrusion joint to cooperate with each other, removes the fastening nut and the connecting sleeve at one end of the original machine pipeline joint connected to the damaged pipe, cuts off and removes the pipe at the damaged part, cuts off a new pipe of appropriate length that is consistent with the size specification of the original machine pipe, connects the two ends of the double-head radial extrusion joint or the double-head axial extrusion joint to the original machine pipe and one end of the new pipe respectively, connects one end of the extrudable and deformable structure in the single-head light radial extrusion joint or the single-head light axial extrusion joint to the other end of the new pipe, and assembles one end of the fastening connection structure with the connecting seat of the original machine pipeline joint.

[0013] The above-mentioned aircraft hydraulic pipeline rapid repair method, when repairing damage in other areas of the aircraft hydraulic pipeline, if it is a point leakage damage, uses a double-headed radial extrusion joint or a double-headed axial extrusion joint to cut off and remove the damaged part of the catheter from the damaged position, and connects the two ends of the double-headed radial extrusion joint or the double-headed axial extrusion joint to the catheter respectively.

[0014] The above-mentioned aircraft hydraulic pipeline rapid repair method, when repairing damage in other areas of the aircraft hydraulic pipeline, if the damaged area is large, cut off and remove the catheter at the damaged part, cut off a new catheter of appropriate length that is consistent with the size specification of the original aircraft catheter, and use two sets of double-headed radial extrusion joints or double-headed axial extrusion joints to connect the two ends of the double-headed radial extrusion joints or double-headed axial extrusion joints to the original aircraft catheter and one end of the new catheter respectively.

[0015] The present invention provides a method for quickly repairing an aircraft hydraulic pipeline, which realizes serialized, standardized and normalized operations in the process of repairing hydraulic pipeline damage. The implementation premise is that a series of repair components of different structural types are stored in an aircraft repair station. When repairing the aircraft hydraulic pipeline, the repair plan can be optimized according to the damaged position of the hydraulic pipeline, the different pressure levels of the hydraulic pipeline system and the material, and the appropriate repair component can be selected to quickly complete the repair operation of the hydraulic pipeline, thereby solving the problem of long transportation distance and long repair cycle of accessories provided by the pipeline manufacturer, and achieving the purpose of improving work efficiency and reducing comprehensive costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the aircraft hydraulic system piping partition; Figure 2 This is a schematic diagram of the original machine hydraulic system pipe joint structure; Figure 3 It is a schematic diagram of the structure of the double-head radial extrusion type joint adopted by the present invention; Figure 4 It is a schematic diagram of the structure of a single-head light radial extrusion joint used in the present invention; Figure 5 It is a schematic diagram of the structure of the double-headed axial extrusion joint used in the present invention; Figure 6 It is a schematic diagram of the structure of a single-head light-duty axial extrusion type joint adopted by the present invention; Figure 7 This is a schematic diagram of a threaded nut; Figure 8 yes Figure 7 A schematic diagram of the cross-sectional structure of; Fig. 9 yes Figure 7 K-direction view; Fig.10 This is a schematic diagram of the repair of the joint area damage in the aircraft hydraulic pipeline using a single-head light-weight radial extrusion joint; Fig.11 This is a schematic diagram of the repair of the joint area damage in the aircraft hydraulic pipeline using a single-head light-weight axial extrusion joint; Fig.12 It is a schematic diagram of the repair of damage to the area near the aircraft hydraulic pipe joint using a single-head light radial extrusion joint and a double-head radial extrusion joint assembly; Fig.13 This is a schematic diagram of the repair of damage to the area near the aircraft hydraulic pipe joint using a single-head light-weight axial extrusion joint and a double-head axial extrusion joint assembly.

[0017] Explanation of the symbols in the figure: 1 is a catheter; 2 is a pipe joint, 2-1 is a connecting seat, 2-2 is a connecting sleeve, and 2-3 is a fastening nut; 3 is a double-head radial extrusion joint, 3-1 is a radial extrusion pipe sleeve, 3-1-1 is a conical surface, 3-1-2 is a cut surface, 3-1-3 is an annular groove, 3-1-4 is a cylindrical surface, and 3-2 is a sealing ring; 4 is a single-head light radial extrusion type joint, 4-1 is one end of a radially extrudable deformation structure, and 4-2 is a first arc surface; 5 is a threading nut, 5-1 is a nut body, 5-1-1 is an annular limiting groove, 5-1-2 is a threaded connection part, 5-1-3 is a through hole, and 5-2 is a steel wire; 6 is a double-headed axial extrusion type joint, 6-1 is an axial extrusion type pipe sleeve, 6-1-1 is an extrusion deformation energy absorption ring groove, 6-2 is an axial extrusion ring, and 6-3 is an extrusion contact surface; 7 is a single-head light axial extrusion type joint, 7-1 is one end of the axially extrudable deformation structure, and 7-2 is a second arc surface; A is the joint area in the aircraft hydraulic pipeline, B is the area near the joint in the aircraft hydraulic pipeline, and C is other areas in the aircraft hydraulic pipeline. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] See Figure 1. Figure 2 The hydraulic system on the aircraft adopts the connection method of hydraulic pipeline conduit 1 and pipeline joint 2. According to the position of pipeline joint 2, the hydraulic pipeline can be divided into three major areas A, B, and C, where A is the joint area in the aircraft hydraulic pipeline, B is the area near the joint in the aircraft hydraulic pipeline, and C is other areas in the aircraft hydraulic pipeline; the pipeline joint 2 is composed of a connecting seat 2-1, a connecting sleeve 2-2 and a fastening nut 2-3, where the two ends of the connecting seat 2-1 are respectively connected to the hydraulic pipeline conduit 1 through the connecting sleeve 2-2, and the connecting sleeve 2-2 is locked and fixed to the hydraulic pipeline conduit 1 through the fastening nuts 2-3 arranged at both ends. During the service of the aircraft, its hydraulic pipeline conduit 1 is prone to damage such as cracks and leakage. In order to ensure the safe flight of the aircraft, the damaged pipeline needs to be repaired in time. In the prior art, the commonly used repair method for damaged aircraft hydraulic system pipelines is: first, the damaged pipeline information is sent to the pipeline manufacturer, and the manufacturer manufactures pipelines of the same specifications based on the damaged pipeline digital model; then the manufactured pipelines are sent to the aircraft docking station, the damaged pipelines are removed, and then replaced with new pipelines. However, because the aircraft docking station and the pipeline manufacturer are often not in the same area, the transportation distance is long, resulting in a long repair process and high comprehensive cost.

[0020] See also Figure 3 , Figure 4 , Figure 5 , Figure 6In order to realize the rapid repair of aircraft hydraulic pipelines after damage, the present invention proposes a serialized, standardized and normalized operation method, the implementation premise of which is to reserve a series of repair components of different structural types in the aircraft repair station. When repairing the aircraft hydraulic system, the aircraft hydraulic pipelines can be repaired by replacing the damaged parts locally according to the different damaged positions of the aircraft hydraulic pipelines, and the replacement parts can be connected and assembled with the original pipelines by using radial extrusion series components or axial extrusion series components, wherein the radial extrusion series components are used for the repair of pipelines with a hydraulic system pressure below 21MPa, and the axial extrusion series components are used for the repair of pipelines with a hydraulic system pressure below 35MPa; The radial extrusion series components include a double-headed radial extrusion joint 3 and a single-headed light-weight radial extrusion joint 4, and the axial extrusion series components include a double-headed axial extrusion joint 6 and a single-headed light-weight axial extrusion joint 7; the double-headed radial extrusion joint 3 and the double-headed axial extrusion joint 6 are both left-right symmetrical structures, and the connection of the two conduits 1 of the hydraulic pipeline is achieved through extrusion and deformation at the left and right ends; the single-headed light-weight radial extrusion joint 4 and the single-headed light-weight axial extrusion joint 7 have one end that is an extrudable and deformable structure and the other end that is a fastening connection structure, which is used to achieve the connection between the conduit 1 of the hydraulic pipeline and the original machine pipeline joint 2, and a threading nut 5 that cooperates with the original machine pipeline joint 2 is provided at one end of the fastening connection structure.

[0021] See also Figure 7 , Figure 8 , Fig. 9 In the aircraft hydraulic pipeline rapid repair method described in the present invention, in the single-head light radial extrusion type joint 4 and the single-head light axial extrusion type joint 7 adopted therein, the threading nut 5 matched therewith comprises a nut body 5-1 and a steel wire 5-2; the nut body 5-1 is provided with a limiting portion and a threaded connection portion 5-1-2, an annular limiting groove 5-1-1 is arranged on the inner side wall of the limiting portion, and a through hole 5-1-3 tangentially connected to the annular limiting groove 5-1-1 is arranged on the outer wall of the limiting portion; the steel wire 5-2 is inserted into the annular limiting groove 5-1-1 through the through hole 5-1-3 of the limiting portion to form a limiting ring matched with one end of the fastening connection structure in the single-head light radial extrusion type joint 4 and the single-head light axial extrusion type joint 7.

[0022] See also Figure 3The aircraft hydraulic pipeline rapid repair method described in the present invention adopts a double-headed radial extruded joint 3 comprising a radial extruded pipe sleeve 3-1 and a sealing ring 3-2; the radial extruded pipe sleeve 3-1 is a bilaterally symmetrical structure, and an annular sealing groove is provided on its inner wall. The outer surfaces of the left and right ends of the radial extruded pipe sleeve 3-1 are conical surfaces 3-1-1, and the outer surface of the middle part is a cylindrical surface 3-1-4. An annular groove 3-1-3 is provided between the left and right conical surfaces 3-1-1 and the middle part cylindrical surface 3-1-4. A plurality of cut surfaces 3-1-2 are formed by removing materials on the left and right conical surfaces 3-1-1 and the transition surfaces between the annular groove 3-1-3. The cut surfaces 3-1-2 are planes uniformly arranged along the circumference of the radial extruded pipe sleeve 3-1 and parallel to the axial center axis thereof; the sealing ring 3-2 is embedded in the annular sealing groove on the inner wall of the radial extruded pipe sleeve 3-1.

[0023] See also Figure 4 In the aircraft hydraulic pipeline rapid repair method described in the present invention, in the single-head light-weight radial extrusion joint 4 adopted therein, one end 4-1 of its radially extrudable deformable structure is the same as the left or right structure of the double-head radial extrusion joint 3; the inner hole diameter size of the radial extrusion sleeve at one end of the fastening connection structure matches the inner diameter size of the connected conduit 1, and an annular groove is provided on the outer side wall of the radial extrusion sleeve, and the side wall of the annular groove is a first arc surface 4-2 of the outer surface of the steel wire matching the threading nut.

[0024] See also Figure 5 The aircraft hydraulic pipeline rapid repair method described in the present invention adopts a double-headed axial extrusion joint 6 including an axial extrusion pipe sleeve 6-1 and an axial extrusion ring 6-2; the axial extrusion pipe sleeve 6-1 is a bilaterally symmetrical structure, and at least two extrusion deformation energy absorption ring grooves 6-1-1 are arranged on its inner wall; the axial extrusion ring 6-2 is sleeved on the outside of the axial extrusion pipe sleeve 6-1, and an extrusion contact surface 6-3 is arranged on the inner wall of the axial extrusion ring 6-2 and the outer wall of the axial extrusion pipe sleeve 6-1, and the extrusion contact surface 6-3 is a progressive stepped arc surface along the axial diameter size.

[0025] See also Figure 6 In the aircraft hydraulic pipeline rapid repair method described in the present invention, in the single-head light axial extrusion joint 7 adopted therein, one end 7-1 of its axially extrudable deformable structure is the same as the left or right structure of the double-head axial extrusion joint 6; the inner hole diameter size of the axial extrusion sleeve at one end of the fastening connection structure matches the inner diameter size of the connected conduit 1, and an annular groove is provided on the outer side wall of the axial extrusion sleeve, and the side wall of the annular groove is a second arc surface 7-2 of the outer surface of the steel wire matching the threading nut.

[0026] See also Figure 1 , Fig.10In the preferred embodiment of the aircraft hydraulic pipeline rapid repair method described in the present invention, when repairing the damage of the joint area A in the aircraft hydraulic pipeline, a single-head light-weight radial extrusion joint 4 is used, the fastening nut 2-3 and the connecting sleeve 2-2 at one end of the original machine pipeline joint 2 connected to the damaged conduit 1 are removed, the conduit at the damaged part is cut off and removed, and the radial extrusion special tool is used to make the end 4-1 of the radially extrudable and deformable structure in the single-head light-weight radial extrusion joint 4 sealed and connected with the original machine conduit 1, one end of the fastening connection structure is assembled with the connecting seat 2-1 of the original machine pipeline joint 2 through the threading nut 5, and the single-head light-weight radial extrusion joint 4 is axially limited by the cooperation of the steel wire 5-2 in the threading nut 5 and the first arc surface 4-2 at one end of the fastening connection structure.

[0027] See also Figure 1 , Fig.11 In the preferred embodiment of the aircraft hydraulic pipeline rapid repair method described in the present invention, when repairing the damage of the joint area A in the aircraft hydraulic pipeline, a single-head light axial extrusion type joint 7 is used, the fastening nut 2-3 and the connecting sleeve 2-2 at one end of the original machine pipeline joint 2 connected to the damaged conduit 1 are removed, the conduit at the damaged part is cut off and removed, and the end of the extrudable and deformable structure in the single-head light axial extrusion type joint 7 is sealed and connected to the original machine conduit 1 through an axial extrusion special tool, and one end of the fastening connection structure is assembled with the connecting seat 2-1 of the original machine pipeline joint 2 through a threading nut 5, and the single-head light axial extrusion type joint 7 is axially limited by the cooperation of the steel wire 5-2 in the threading nut 5 and the second arc surface 7-2 at one end of the fastening connection structure.

[0028] See also Figure 1 , Fig.12 In the preferred embodiment of the aircraft hydraulic pipeline rapid repair method described in the present invention, when repairing the damage near the joint in the aircraft hydraulic pipeline, a single-head light-weight radial extrusion joint 4 and a double-head radial extrusion joint 3 are used to cooperate, remove the fastening nut 2-3 and the connecting sleeve 2-2 at one end of the original machine pipeline joint 2 connected to the damaged conduit, cut off and remove the conduit at the damaged part, cut off a new conduit of appropriate length that is consistent with the size and specification of the original machine conduit, connect the two ends of the double-head radial extrusion joint 3 to the original machine conduit and one end of the new conduit respectively through a special radial extrusion tool, connect one end 4-1 of the radially extrudable deformable structure in the single-head light-weight radial extrusion joint 4 to the other end of the new conduit through the special radial extrusion tool, assemble one end of the fastening connection structure with the connecting seat 2-1 of the original machine pipeline joint 2 through a threading nut 5, and axially limit the single-head light-weight radial extrusion joint 4 through the cooperation of the steel wire 5-2 in the threading nut 5 and the first arc surface 4-2 at one end of the fastening connection structure.

[0029] See also Figure 1 , Fig.13In the preferred embodiment of the aircraft hydraulic pipeline rapid repair method described in the present invention, when repairing the damage in the area near the joint in the aircraft hydraulic pipeline, a single-head light axial extrusion joint 7 and a double-head axial extrusion joint 6 are used to cooperate with each other, remove the fastening nut 2-3 and the connecting sleeve 2-2 at one end of the original machine pipeline joint 2 connected to the damaged conduit, cut off and remove the conduit at the damaged part, cut off a new conduit of appropriate length that is consistent with the size and specification of the original machine conduit, connect the two ends of the double-head axial extrusion joint 6 to the original machine conduit and one end of the new conduit respectively through a special axial extrusion tool, connect one end of the extrudable and deformable structure in the single-head light axial extrusion joint 7 to the other end of the new conduit through the special axial extrusion tool, assemble one end of the fastening connection structure with the connecting seat 2-1 of the original machine pipeline joint 2 through a threading nut 5, and axially limit the single-head light axial extrusion joint 7 through the cooperation of the steel wire 5-2 in the threading nut 5 and the second arc surface 7-2 at one end of the fastening connection structure.

[0030] In the preferred embodiment of the aircraft hydraulic pipeline rapid repair method described in the present invention, when repairing damage in other areas C of the aircraft hydraulic pipeline, if it is a point leakage damage, a double-headed radial extrusion joint 3 or a double-headed axial extrusion joint 6 is used to cut off and remove the damaged part conduit from the damaged part, and the two ends of the double-headed radial extrusion joint 3 or the double-headed axial extrusion joint 6 are respectively connected to the conduit 1; if the damaged area is large, the conduit at the damaged part is cut off and removed, and a new conduit of appropriate length consistent with the size and specification of the original machine conduit is cut off, and two sets of double-headed radial extrusion joints 3 or double-headed axial extrusion joints 6 are used to connect the two ends of the double-headed radial extrusion joint 3 or the double-headed axial extrusion joint 6 to the original machine conduit and one end of the new conduit. In addition, when the hydraulic pipeline damage occurs at the bending position of the conduit 1, the damaged pipeline can be repaired by using a standard elbow connection part (such as a 45° elbow or a 90° elbow standard part) and a double-headed radial extrusion joint 3 or a double-headed axial extrusion joint 6 in combination.

Claims

1. A method for quickly repairing aircraft hydraulic pipelines, characterized in that: According to different damaged positions of aircraft hydraulic pipelines, the damaged parts are repaired by partial replacement mode, and the replacement parts are connected and assembled with the original aircraft pipelines by using radial extrusion series components or axial extrusion series components, wherein the radial extrusion series components are used to repair pipelines with hydraulic system pressure below 21MPa, and the axial extrusion series components are used to repair pipelines with hydraulic system pressure below 35MPa; the radial extrusion series components include double-head radial extrusion joints (3) and single-head light radial extrusion joints (4), and the axial extrusion series components include double-head axial extrusion joints ( 6) and a single-head light axial extrusion joint (7); the double-head radial extrusion joint (3) and the double-head axial extrusion joint (6) are both left-right symmetrical structures, and the connection of the two conduits (1) of the hydraulic pipeline is achieved through extrusion deformation at the left and right ends; the single-head light radial extrusion joint (4) and the single-head light axial extrusion joint (7) have one end that is an extrudable and deformable structure and the other end that is a fastening connection structure, which is used to achieve the connection between the conduit (1) of the hydraulic pipeline and the original machine pipeline joint (2), and a threading nut (5) that cooperates with the original machine pipeline joint is provided at one end of the fastening connection structure.

2. The method for rapid repair of aircraft hydraulic pipelines according to claim 1, characterized in that: In the single-head light radial extrusion type joint (4) and the single-head light axial extrusion type joint (7) used therein, the threading nut (5) matched therewith comprises a nut body (5-1) and a steel wire (5-2); the nut body (5-1) is provided with a limiting portion and a threaded connection portion (5-1-2); an annular limiting groove (5-1-1) is provided on the inner side wall of the limiting portion; and a through hole (5-1-3) tangentially connected to the annular limiting groove (5-1-1) is provided on the outer wall of the limiting portion; the steel wire (5-2) passes through the through hole (5-1-3) of the limiting portion into the annular limiting groove (5-1-1) to form a limiting ring matched with one end of the fastening connection structure in the single-head light radial extrusion type joint (4) and the single-head light axial extrusion type joint (7).

3. The method for rapid repair of aircraft hydraulic pipelines according to claim 2, characterized in that: The double-head radial extrusion joint (3) adopted by the invention comprises a radial extrusion pipe sleeve (3-1) and a sealing ring (3-2); the radial extrusion pipe sleeve (3-1) is a bilaterally symmetrical structure, an annular sealing groove is arranged on its inner wall, the outer surfaces of the left and right ends of the radial extrusion pipe sleeve (3-1) are conical surfaces (3-1-1), the outer surface of the middle part is a cylindrical surface (3-1-4), an annular groove (3-1-3) is arranged between the left and right conical surfaces (3-1-1) and the middle part cylindrical surface (3-1-4), a plurality of cut surfaces (3-1-2) are formed by removing material on the transition surfaces between the left and right conical surfaces (3-1-1) and the annular groove (3-1-3), the cut surfaces (3-1-2) are planes evenly arranged along the circumference of the radial extrusion pipe sleeve (3-1) and parallel to the axial center axis thereof; the sealing ring (3-2) is embedded in the annular sealing groove on the inner wall of the radial extrusion pipe sleeve (3-1).

4. The method for rapid repair of aircraft hydraulic pipelines according to claim 3, characterized in that: In the single-head light radial extrusion joint (4) used, one end (4-1) of the radially extrudable deformation structure is the same as the left or right structure of the double-head radial extrusion joint (3), the inner diameter size of the radial extrusion sleeve at one end of the fastening connection structure matches the inner diameter size of the connected conduit (1), and an annular groove is provided on the outer side wall of the radial extrusion sleeve, and the side wall of the annular groove is a first arc surface (4-2) that matches the outer surface of the steel wire of the threading nut.

5. The method for rapid repair of aircraft hydraulic pipelines according to claim 2, characterized in that: The double-headed axial extrusion joint (6) adopted therein comprises an axial extrusion tube sleeve (6-1) and an axial extrusion ring (6-2); the axial extrusion tube sleeve (6-1) is a bilaterally symmetrical structure, and at least two extrusion deformation energy absorption ring grooves (6-1-1) are arranged on its inner wall; the axial extrusion ring (6-2) is sleeved on the outside of the axial extrusion tube sleeve (6-1), and an extrusion contact surface (6-3) is arranged on the inner wall of the axial extrusion ring (6-2) and the outer wall of the axial extrusion tube sleeve (6-1); the extrusion contact surface (6-3) is a stepped arc surface with a progressive diameter along the axial direction.

6. The method for rapid repair of aircraft hydraulic pipelines according to claim 5, characterized in that: In the single-head light-weight axially extruded joint (7) adopted by the invention, one end (7-1) of the axially extrudable and deformable structure is the same as the left or right structure of the double-head axially extruded joint (6), the inner diameter size of the axially extruded pipe sleeve at one end of the fastening connection structure matches the inner diameter size of the connected conduit (1), and an annular groove is provided on the outer side wall of the axially extruded pipe sleeve, and the side wall of the annular groove is a second arc surface (7-2) that matches the outer surface of the steel wire of the threading nut.

7. The method for rapid repair of aircraft hydraulic pipelines according to claim 4 or 6, characterized in that: When repairing damage to a joint area (A) in an aircraft hydraulic pipeline, a single-end light radial extrusion joint (4) or a single-end light axial extrusion joint (7) is used, a fastening nut (2-3) and a connecting sleeve (2-2) at one end of an original machine pipeline joint (2) connected to a damaged conduit (1) are removed, the conduit at the damaged part is cut off and removed, one end of an extrudable and deformable structure in the single-end light radial extrusion joint (4) or the single-end light axial extrusion joint (7) is connected to the original machine conduit (1), and one end of the fastening connection structure is assembled with a connecting seat (2-1) of the original machine pipeline joint (2).

8. The method for rapid repair of aircraft hydraulic pipelines according to claim 4 or 6, characterized in that: When repairing damage to the area near the joint in the aircraft hydraulic pipeline, a single-head light radial extrusion joint (4) or a single-head light axial extrusion joint (7) is used in conjunction with a double-head radial extrusion joint (3) or a double-head axial extrusion joint (6), the fastening nut (2-3) and the connecting sleeve (2-2) at one end of the original machine pipeline joint (2) connected to the damaged pipe are removed, the pipe at the damaged part is cut off and removed, a new pipe of appropriate length having the same size and specification as the original machine pipe is cut off, the two ends of the double-head radial extrusion joint (3) or the double-head axial extrusion joint (6) are respectively connected to the original machine pipe and one end of the new pipe, one end of the extrudable deformation structure in the single-head light radial extrusion joint (4) or the single-head light axial extrusion joint (7) is connected to the other end of the new pipe, and one end of the fastening connection structure is assembled with the connecting seat (2-1) of the original machine pipeline joint (2).

9. The method for rapid repair of aircraft hydraulic pipelines according to claim 4 or 6, characterized in that: When repairing damage in other areas of the aircraft hydraulic pipeline, if the damage is point leakage, a double-headed radial extrusion joint (3) or a double-headed axial extrusion joint (6) is used to cut and remove the catheter at the damaged location, and the two ends of the double-headed radial extrusion joint (3) or the double-headed axial extrusion joint (6) are respectively connected to the catheter (1).

10. The method for rapid repair of aircraft hydraulic pipelines according to claim 4 or 6, characterized in that: When repairing damage to other areas of the aircraft hydraulic pipeline, if the damaged area is large, the conduit at the damaged area is cut off and removed, and a new conduit of appropriate length that is consistent with the size and specification of the original conduit is cut off. Two sets of double-headed radial extrusion type joints (3) or double-headed axial extrusion type joints (6) are used, and the two ends of the double-headed radial extrusion type joints (3) or double-headed axial extrusion type joints (6) are respectively connected to the original conduit and one end of the new conduit.

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