Inspection device for surface quality of high-frequency brazing guide pipe in aircraft fuel tank

Abstract

The utility model relates to the field of aviation high-frequency brazing conduit maintenance, and particularly discloses a surface quality inspection device for a high-frequency brazing conduit in an aircraft fuel tank, which comprises an inspection pipe clamp, the inspection pipe clamp comprises an upper pipe clamp and a lower pipe clamp, and inspection cavities are arranged in the upper pipe clamp and the lower pipe clamp. The problem that the surface quality of the brazed position of the hydraulic system high-frequency brazed guide pipe in the narrow area in the aircraft fuel tank is inconvenient to check in the repairing process is solved. By means of the inspection device, inspection of the brazed position of the high-frequency brazed guide pipe in the narrow area in the fuel tank can be achieved, and the found faults such as brazed position bending and weld joint cracking can be preventively repaired, so that the inspection and repair quality of the high-frequency brazed guide pipe in the fuel tank is improved, and the use safety of an airplane hydraulic system is guaranteed.

Description

Technical Field

[0001] This utility model relates to an inspection device, specifically an inspection device for the surface quality of a high-frequency brazed conduit inside an aircraft fuel tank, belonging to the field of aviation high-frequency brazed conduit maintenance. Background Technology

[0002] The hydraulic system piping inside aircraft fuel tanks typically uses high-frequency brazing to connect various pipe joints. These pipes, laid inside the fuel tank, transport aviation hydraulic oil and nitrogen, among other media. Failure during flight can lead to fuel system contamination, decreased hydraulic system function, or even forced landings, severely impacting flight safety. The fuel tank contains numerous pipes and accessories, and some high-frequency brazed hydraulic system conduits are fixed in wall penetration areas. Due to the narrowness of these areas, inspecting the brazed areas during repairs is difficult. When brazed joints exhibit bending or cracking, the fatigue resistance of the conduit decreases, reducing its service life. Therefore, a comprehensive inspection of the brazed joints of the high-frequency brazed hydraulic system conduits is crucial during repairs. Preventative repairs should be performed on any bent joints or cracked welds to mitigate the risks associated with conduit use. Thus, developing a device for inspecting the surface quality of brazed joints in high-frequency brazed hydraulic system conduits within aircraft fuel tanks is of significant importance in providing support for the repair and inspection of these conduits. Utility Model Content

[0003] To address the problems in the prior art, this utility model provides a device for inspecting the surface quality of high-frequency brazed conduits inside aircraft fuel tanks.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A device for inspecting the surface quality of high-frequency brazed conduits inside an aircraft fuel tank includes a detection clamp, which comprises an upper clamp and a lower clamp, both of which have a detection cavity inside.

[0006] Optionally, the upper and lower pipe clamps are rotatably mounted on one side via a rotating shaft.

[0007] Optionally, the upper pipe clamp has a protruding end connected to one side, and the lower pipe clamp has two limiting ends connected to one side. Both the protruding end and the limiting ends have through holes. When the upper and lower pipe clamps are installed, the protruding end is inserted between the two limiting ends, and the rotating shaft passes through the protruding end and the two limiting ends through the through holes.

[0008] Optionally, the shape of the detection cavity inside the upper and lower pipe clamps after splicing is the same as the shape of the part to be detected in the high-frequency brazed conduit.

[0009] The beneficial effects of this utility model are:

[0010] This invention solves the problem of inconvenient surface quality inspection of the brazed joints of high-frequency brazed conduits in the narrow area of ​​the hydraulic system inside the aircraft fuel tank during repairs. This inspection device enables the inspection of the brazed joints of high-frequency brazed conduits in the narrow area of ​​the fuel tank, allowing for preventative repairs of faults such as brazed joint bending and weld cracking. This improves the quality of inspection and repair of high-frequency brazed conduits inside the fuel tank, ensuring the safe operation of the aircraft hydraulic system. Attached Figure Description

[0011] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0012] Figure 1 This is a schematic diagram of the installation structure of the inspection device for the surface quality detection of the high-frequency brazed conduit of this utility model.

[0013] Figure 2 This is a schematic diagram of the upper pipe clamp structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the rotating shaft structure of this utility model.

[0015] Figure 4 This is a schematic diagram of the lower pipe clamp structure of this utility model.

[0016] Figure 5 This is a schematic diagram of the high-frequency brazing conduit structure of this utility model.

[0017] Figure 6 This is a flowchart for inspecting the surface quality of the brazed part of the high-frequency brazed conduit of this utility model.

[0018] In the diagram: 1. Upper pipe clamp; 2. Shaft; 3. Lower pipe clamp; 4. High-frequency brazed conduit; 401. Flange type joint; 402. Pipe body. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Please see Figure 1-6 As shown, a device for inspecting the surface quality of high-frequency brazed conduits inside an aircraft fuel tank includes a detection clamp, comprising an upper clamp 1 and a lower clamp 3, both of which have detection cavities inside. The detection cavities inside the upper clamp 1 and the lower clamp 3 are identical. After the upper clamp 1 and the lower clamp 3 are rotated and spliced ​​into a single unit, the two detection cavities inside can form an integral chamber, facilitating the shaping of quick-drying putty inside the chamber.

[0021] Specifically, the upper pipe clamp 1 and the lower pipe clamp 3 are rotatably installed on one side via the rotating shaft 2. The rotatable installation facilitates the combined installation of the upper pipe clamp 1 and the lower pipe clamp 3 during inspection, and allows for quick disassembly from the surface of the high-frequency brazed conduit 4 after inspection. The entire operation is relatively simple and efficient.

[0022] Specifically, one side of the upper pipe clamp 1 is connected to a protruding end, and one side of the lower pipe clamp 3 is connected to two limiting ends. Both the protruding end and the limiting ends have through holes. When the upper pipe clamp 1 and the lower pipe clamp 3 are installed, the protruding end is inserted between the two limiting ends, and the rotating shaft 2 passes through the protruding end and the two limiting ends through the through holes.

[0023] Specifically, the shape of the internal inspection cavities of the upper pipe clamp 1 and the lower pipe clamp 3 after splicing is the same as the shape of the area to be inspected in the high-frequency brazed conduit 4. This ensures that the quick-drying putty mold shaped inside the spliced ​​inspection cavity is the same as the shape of the area to be inspected in the standard high-frequency brazed conduit 4.

[0024] The high-frequency brazed conduit 4 inside the aircraft fuel tank consists of a pipe body 402 and a flanged joint 401. The flanged joint 401 is fixed to the aircraft frame structure. If bending or weld cracking occurs at the brazed joint where the flanged joint 401 connects to the pipe body 402, it will reduce the fatigue resistance of the high-frequency brazed conduit 4. The specific testing process for the high-frequency brazed conduit 4 is as follows:

[0025] Step 1: Fill the detection chambers of the upper pipe clamp 1 and lower pipe clamp 3 in the inspection device with quick-drying putty.

[0026] Step 2: Prepare a standard test piece for the high-frequency brazed conduit 4. This standard test piece is a qualified product. Cover the area to be tested (brazed part) of the standard test piece for the high-frequency brazed conduit 4 with the quick-drying putty filling inspection device, thereby shaping the quick-drying putty. The shaped quick-drying putty mold has the same shape and size as the area to be tested on the standard test piece. During covering, the upper pipe clamp 1 and the lower pipe clamp 3 can be rotated and spliced. After the quick-drying putty mold is shaped, the upper pipe clamp 1 and the lower pipe clamp 3 are rotated and separated, and the quick-drying putty mold is also separated into two halves.

[0027] Step 3: After the quick-drying putty mold is shaped, the inspection device is used to cover the brazing part of the high-frequency brazing conduit 4 of the hydraulic system in the small area to be inspected on the aircraft, so that the two halves of the quick-drying putty mold are spliced ​​together and covered on the brazing part to be inspected as the upper pipe clamp 1 and the lower pipe clamp 3 rotate.

[0028] Step 4: Remove the inspection device. The upper pipe clamp 1 and lower pipe clamp 3 rotate and separate, and the quick-drying putty mold is also separated into two halves. The quick-drying putty mold remains inside the inspection chamber. The mold is then inspected, and the deformation of the mold is used to determine whether the brazing of the high-frequency brazing conduit 4 in the confined hydraulic system is qualified. Due to the material properties of quick-drying putty, the mold has a malleable shape similar to clay during inspection. The deformation of the brazing area can be directly displayed on the mold, making it easy for staff to clearly understand the deformation.

[0029] Step 5: If the brazing part of the high-frequency brazing conduit 4 of the hydraulic system is deemed qualified, the work ends; if it is deemed unqualified, the high-frequency brazing conduit 4 is repaired, and after repair, it is re-tested and judged using an inspection device.

[0030] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for inspecting the surface quality of high-frequency brazed conduits inside an aircraft fuel tank, characterized in that, The device includes a detection clamp, which comprises an upper clamp (1) and a lower clamp (3), both of which have a detection cavity inside.

2. The device for inspecting the surface quality of a high-frequency brazed conduit inside an aircraft fuel tank according to claim 1, characterized in that, The upper pipe clamp (1) and the lower pipe clamp (3) are rotatably installed on one side via a rotating shaft (2).

3. The device for inspecting the surface quality of a high-frequency brazed conduit inside an aircraft fuel tank according to claim 1, characterized in that, The upper pipe clamp (1) has a protruding end connected to one side, and the lower pipe clamp (3) has two limiting ends connected to one side. Both the protruding end and the limiting end have through holes. When the upper pipe clamp (1) and the lower pipe clamp (3) are installed, the protruding end is inserted between the two limiting ends, and the rotating shaft (2) passes through the protruding end and the two limiting ends through the through holes.

4. The device for inspecting the surface quality of a high-frequency brazed conduit inside an aircraft fuel tank according to claim 1, characterized in that, The shape of the internal detection cavity of the upper pipe clamp (1) and the lower pipe clamp (3) after splicing is the same as the shape of the high-frequency brazed conduit (4) to be tested.

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