Airtight test universal tool for airplane pipeline pieces

Abstract

The utility model discloses a general tool for an airtight test of an airplane pipeline piece, which belongs to the technical field of aviation equipment and mainly comprises a fixed seat, a screw rod, a sleeve and the like, a strip-shaped hole groove is formed in a top plate of the fixed seat, flange connecting holes are formed in a side wall plate and a bottom plate of the fixed seat to hermetically connect a joint at one end of the pipeline piece, and the screw rod penetrates through the middle of the sleeve. Two ends of the screw rod are fixed on two side wall plates of the fixed seat, and the sleeve can adjust horizontal and vertical positions so as to hermetically connect a joint at the other end of the pipeline piece; and the position of the sleeve can be adjusted, so that the device can be suitable for pipeline pieces of different types and sizes. According to the utility model, the working efficiency can be improved, the safety and stability of the test are ensured, and the aircraft maintenance quality is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of aviation equipment technology and relates to a general tooling for testing the airtightness of aircraft pipeline components. Background Technology

[0002] A certain type of aircraft piping system has two connection types: one is a straight-through pipe (such as...) Figure 2 One type is bent pipe fittings (such as...) Figure 1 Among them, bent pipe fittings include two types: those with parallel and those with perpendicular joints on both sides. After the repair and assembly of pipe fittings, it is necessary to plug one joint of the straight pipe fitting and add (0.49±0.029)MPa[(5±0.3)kgf / cm] to the other side. 2 Maintain the cold air pressure at 5 min, ensuring no leaks at any joints; for bent pipe fittings, plug one side of the joint and add (2.94±0.12) MPa [(30±1) kgf / cm²] to the other side. 2 The cold air pressure is maintained for 5 minutes, and no air leakage is allowed at any joint. Since both types of pipe fittings are connected by flanges at both ends without inflation ports, a special test fixture is required to seal one flange end and inflate the other. Currently, the repair shop can provide a clean and stable air source, guaranteeing air pressure requirements of (0.49±0.029) MPa and (2.94±0.12) MPa. Both types of pipe fittings have flat ends, which can meet the sealing requirements. However, due to the inconsistent dimensions and fixing positions of the bent pipe fittings, and the need to ensure the safety of the sealing test, there is a lack of airtight testing fixtures suitable for various pipe fittings, especially bent pipe fittings of various sizes. Utility Model Content

[0003] In view of this, the present invention provides a universal tooling for airtight testing of aircraft piping components, which is used to perform airtight testing on piping components after maintenance, thereby ensuring the quality of aircraft overhaul and operational safety.

[0004] The present invention adopts the following technical solution:

[0005] A general-purpose tooling for testing the air tightness of aircraft piping components includes a fixed seat 1, a screw 2, a screw fixing nut 3, a sleeve 4, a sleeve fixing seat 5, a sleeve fixing nut 6, a sealing gasket 7, and an inflation nozzle 8.

[0006] The fixing base 1 is a square frame structure with a strip-shaped hole groove on its top plate and through holes on the upper part of the two side walls. One side wall has a set of flange mounting holes with a threaded hole in the center. The bottom plate also has flange mounting holes and threaded holes. The threaded holes on the side wall and bottom plate of the fixing base 1 are all fitted with air inlets 8 to connect to the air source. The flange mounting holes are used to fix the flange at one end of the pipeline component under test. Depending on the shape of the pipeline component under test, it is fixed on the side wall or the bottom plate. When connecting, a sealing gasket 7 is set between the fixing base 1 and the pipeline component under test to achieve a seal. The sealing gasket 7 has a through hole corresponding to the position of the air inlet 8 to ensure unobstructed air passage.

[0007] The sleeve 4 has a flange at the lower end, a square cylinder in the middle, and a round pipe at the upper end. The square cylinder has vertical strip holes on both sides. The flange is used to connect to the flange at the other end of the pipeline component being tested. Another sealing gasket 7 is pasted on the end face of the flange of the sleeve 4 to achieve a sealed connection with the pipeline component being tested.

[0008] The sleeve fixing seat 5 is a sleeve with a thread on one end and a circumferential boss on the other end. It is fitted onto the round tube part of the sleeve 4. After the sleeve fixing seat 5 passes through the strip-shaped groove from the lower end of the top plate of the fixing seat 1, it is locked by the sleeve fixing nut 6 to fix the position of the sleeve 4. The sleeve fixing seat 5 together with the sleeve 4 can move along the strip-shaped groove, and the sleeve 4 can move up and down within the sleeve fixing seat 5 to realize the horizontal and vertical position adjustment of the sleeve 4.

[0009] The screw 2 passes through the strip holes on both sides of the square tube of the sleeve 4, and its two ends pass through the through holes on the upper part of the side wall plates of the fixing base 1. It is fixed to the fixing base 1 with nuts. The sleeve 4 can also be adjusted in the horizontal and vertical directions by means of the strip holes on both sides of the square tube. The screw 2 outside the side wall of the square tube is equipped with screw fixing nuts 3, which are used to lock the horizontal and vertical position of the sleeve 4 on the screw 2.

[0010] Furthermore, the fixing base 1 is provided with various sizes to meet the testing requirements of bent and straight pipe fittings of different sizes.

[0011] Furthermore, the sleeve 4 is available in various square tube sizes to accommodate pipe fittings with different flange sizes, but the square tube must meet strength requirements to prevent deformation during test pressurization.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model enables the smooth conduct of airtightness tests on aircraft piping components through mechanical operation, achieving the goal of one person operating the system independently, while ensuring the safety and stability of the test, thereby guaranteeing the quality of aircraft maintenance.

[0014] 2. The horizontal and vertical positions of the sleeve are adjustable, enabling this invention to be applied to pipe fittings of different types and sizes.

[0015] 4. To accommodate various types of pipe fittings with different pipe fixing positions, inflation nozzles are installed on both the side and bottom of the fixing seat. Select the appropriate inflation nozzle based on the specific pipe fitting. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a bent pipe fitting;

[0017] Figure 2 This is a schematic diagram of a straight-through pipe fitting;

[0018] Figure 3 This is a diagram illustrating the effect of using the bent pipe fitting of this utility model;

[0019] Figure 4 This is a diagram illustrating the effect of using the straight-through pipe fitting of this utility model;

[0020] Figure 5 This is a schematic diagram of the fixing base of this utility model, wherein (a) is Figure 3 and Figure 4 View A, (b) is Figure 3 and Figure 4 View from direction B;

[0021] Figure 6 This is a schematic diagram of the sleeve of this utility model, wherein (a) is the front view and (b) is the view from direction A;

[0022] Figure 7 The present invention provides a schematic diagram of the sleeve fixing seat and the sleeve fixing nut, wherein (a) is a cross-sectional view of the sleeve fixing seat and (b) is a cross-sectional view of the sleeve fixing nut.

[0023] Figure 8 This is a schematic diagram of the sealing gasket of this utility model;

[0024] Figure 9 This is a schematic diagram of the inflation nozzle of this utility model.

[0025] Among them, 1-fixed seat; 2-screw; 3-screw fixing nut; 4-sleeve; 5-sleeve fixing seat; 6-sleeve fixing nut; 7-sealing gasket; 8-inflation nozzle. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below.

[0027] A general-purpose tooling for testing the air tightness of aircraft piping components includes a fixed seat 1, a screw 2, a screw fixing nut 3, a sleeve 4, a sleeve fixing seat 5, a sleeve fixing nut 6, a sealing gasket 7, and an inflation nozzle 8.

[0028] like Figure 5 As shown, the fixing base 1 is a square frame structure, formed by welding four steel plates. Its top plate has a strip-shaped perforation groove, and the upper parts of the two side walls have through holes. One side wall also has a set of flange mounting holes, with a threaded hole at the center. The bottom plate also has flange mounting holes and threaded holes. Inflation nozzles 8 (such as...) are installed in the threaded holes on both the side walls and the bottom plate of the fixing base 1. Figure 9 The flange mounting holes are used to fix the flange at one end of the pipeline component under test, and are selected to be fixed to the side wall plate or the bottom plate according to the shape of the pipeline component under test. A sealing gasket 7 is pasted on the connection area between the fixing seat 1 and the pipeline component under test (e.g., Figure 8 To achieve a seal, the sealing gasket 7 has a through hole at the position corresponding to the inflation nozzle 8 to ensure unobstructed air passage; for bent pipe fittings with parallel connectors at both ends, one connector is installed in the flange mounting hole on the base plate of the fixed seat 1; for bent pipe fittings with perpendicular connectors at both ends, one connector is installed in the flange mounting hole on the side wall plate of the fixed seat 1.

[0029] like Figure 6 As shown, the lower end of the sleeve 4 is a flange, the middle part is a square cylinder, and the upper end is a round pipe. The two side walls of the square cylinder have vertical strip holes. The flange is used to connect to the flange at the other end of the pipeline component being tested. Another sealing gasket 7 is pasted on the end face of the flange of the sleeve 4 to achieve a sealed connection with the pipeline component being tested.

[0030] like Figure 7 As shown, the sleeve fixing seat 5 is a sleeve with a thread on one end and a circumferential boss on the other end. It is fitted onto the round tube part of the sleeve 4. After the sleeve fixing seat 5 passes through the strip-shaped groove from the lower end of the top plate of the fixing seat 1, it is locked by the sleeve fixing nut 6 to fix the position of the sleeve 4. The sleeve fixing seat 5 together with the sleeve 4 can move along the strip-shaped groove, and the sleeve 4 can move up and down inside the sleeve fixing seat 5 to realize the horizontal and vertical position adjustment of the sleeve 4.

[0031] The screw 2 passes through the strip holes on both sides of the square tube of the sleeve 4, and its two ends pass through the through holes on the upper part of the side wall plates of the fixing base 1. It is fixed to the fixing base 1 with nuts. The sleeve 4 can also be adjusted in the horizontal and vertical directions by means of the strip holes on both sides of the square tube. The screw 2 outside the side wall of the square tube is equipped with screw fixing nuts 3, which are used to lock the horizontal and vertical position of the sleeve 4 on the screw 2.

[0032] In other embodiments, the dimensions of the mounting base 1 and the square tube of the sleeve 4 are changed to accommodate pipe fittings of other sizes and shapes.

[0033] The usage process in this embodiment is as follows: First, fix one end of the pipe fitting to be tested onto the flange mounting hole on the base plate of the fixing seat 1; loosen the screw fixing nut 3 and the sleeve fixing nut 6, adjust the horizontal and vertical positions of the sleeve 4 so that the flange at its lower end fits against the other end of the pipe fitting to be tested; tighten the screw fixing nut 3 and the sleeve fixing nut 6 to fix the position of the sleeve 4. After connecting the bent pipe fittings with parallel ends, as shown... Figure 3 As shown, after the straight pipe fitting is connected, it is as follows: Figure 4 As shown; connect the air source to the air inlet 8 and conduct a sealing test.

[0034] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A universal tooling for testing the airtightness of aircraft piping components, characterized in that, Includes a fixed base (1), a screw (2), a screw fixing nut (3), a sleeve (4), a sleeve fixing base (5), a sleeve fixing nut (6), and an inflation nozzle (8); The fixed base (1) is a square frame structure. Its top plate has a strip-shaped hole groove, and the upper part of the two side walls has through holes. One side wall is provided with a set of flange mounting holes. The center of the flange mounting holes has a threaded hole. The bottom plate also has flange mounting holes and threaded holes. The threaded holes on the side wall and bottom plate of the fixed base (1) are all equipped with air inlets (8) to connect to the air source. The flange mounting holes are used to fix the flange at one end of the pipeline component under test. The flange is fixed on the side wall or the bottom plate according to the shape of the pipeline component under test. The sleeve (4) has a flange at the lower end, a square cylinder in the middle, and a round pipe at the upper end. The square cylinder has vertical strip holes on both sides. The flange is used to connect to the flange at the other end of the pipe fitting being tested. The sleeve fixing seat (5) is a sleeve with a thread on one end and a circumferential boss on the other end. It is fitted onto the round tube part of the sleeve (4). After the sleeve fixing seat (5) passes through the strip-shaped groove from the bottom of the top plate of the fixing seat (1), it is locked by the sleeve fixing nut (6) to fix the position of the sleeve (4). The sleeve fixing seat (5) together with the sleeve (4) can move along the strip-shaped groove, and the sleeve (4) can move up and down inside the sleeve fixing seat (5) to realize the horizontal and vertical position adjustment of the sleeve (4). The screw (2) passes through the strip holes on both sides of the square tube of the sleeve (4), and its two ends pass through the through holes on the upper part of the side wall plates of the fixing seat (1) and are fixed on the fixing seat (1). The sleeve (4) can also be adjusted in the horizontal and vertical directions by means of the strip holes on both sides of the square tube. The screw (2) outside the side wall of the square tube is equipped with screw fixing nuts (3) to lock the horizontal and vertical position of the sleeve (4) on the screw (2).

2. The universal tooling for testing the airtightness of aircraft piping components according to claim 1, characterized in that, A sealing gasket (7) is provided between the fixed seat (1) and the pipeline component under test, and between the sleeve (4) flange and the pipeline component under test, to achieve sealing. The sealing gasket (7) is provided with a through hole at the position corresponding to the air inlet (8) to ensure that the air path is unobstructed.

3. The universal tooling for testing the airtightness of aircraft piping components according to claim 1, characterized in that, The fixing seat (1) is available in various sizes to meet the testing requirements of different sizes of bent pipe fittings and straight pipe fittings.

4. The universal tooling for testing the airtightness of aircraft piping components according to claim 1, characterized in that, The sleeve (4) is available in various sizes of square tubes.

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