A flexible connection and support structure for large diameter pipe lines through airtight bulkheads

Abstract

The application provides a flexible connection and support structure for a large-diameter pipeline through an air-tight partition frame, and belongs to the field of civil aircraft structure design. The application comprises an aluminum alloy flexible clamp, a pipeline joint, a separation surface, a reinforcing member, a rubber support member, an annular support, a strut, a double-ear support, etc. The separation surface and the reinforcing member are fixed at the air-tight partition frame web opening through a supporting plate nut, the pipeline joint is fixed on the inner wall of the separation surface and penetrates the air-tight partition frame web, the pipeline joint is connected with the pipeline through the aluminum alloy flexible clamp, so that the pipeline joint can swing within a certain angle to release the circumferential displacement, the rubber support member is installed in the annular support and sleeved on the pipeline, so that the pipeline can move axially, and the annular support is supported on the peripheral structure through the strut and the double-ear support on both sides. The application has low manufacturing and installation precision requirements, improves the fatigue resistance, safety and service life of the pipeline, and has a compact structure and mature technology.

Description

Technical Field

[0001] This invention belongs to the field of civil aircraft structural design and relates to a flexible connection and support structure for large-diameter pipelines in an airtight partition frame. Background Technology

[0002] In the field of civil aircraft structural design, pressurized cabins require airtight bulkheads to ensure airtightness. When piping passes through the web of the airtight bulkhead, the web needs to have holes of appropriate sizes according to the pipe diameter to provide passage for the piping. During cabin pressurization and depressurization, directional and circumferential displacement will occur at the openings in the airtight bulkhead web.

[0003] In traditional designs, large-diameter pipes are rigidly connected to pipe joints fixed at openings in the airtight bulkhead web, using tie rods and supports fixed to the surrounding structure and both sides of the pipes for fixation and rigid support. The large openings resulting from the large-diameter pipes cause greater displacement in the opening area during cabin pressurization and depressurization. Traditional designs cannot accommodate this accumulated displacement, and deformation is transmitted to the pipes through the pipe joints at the airtight bulkhead web openings, causing fatigue damage. Simultaneously, the fluid in the pipes generally flows at a non-uniform velocity, inducing pipe vibration. The rigid support method in traditional designs leads to fatigue damage at the supports on both sides of the pipes. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a flexible connection and support structure for large-diameter pipelines with an airtight partition frame. This structure has low requirements for manufacturing and installation precision, improves the pipeline's fatigue resistance, safety, and service life, and features a compact structure and mature technology.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A flexible connection and support structure for large-diameter pipes in an airtight partition frame is disclosed. The flexible connection and support structure includes a pipe 1, an aluminum alloy flexible clamp 2, a pipe joint 3, a separation surface 4, a reinforcing member 5, an airtight partition frame web 6, a rubber support A 7, a rubber support B 8, an annular support A 9, an annular support B 10, a strut 11, a strut end spherical bearing A 12, a strut end spherical bearing B 13, a double-ear support 14, and a support plate nut 15.

[0007] The separation surface 4 is a cylindrical structure with a ring-like structure at its bottom. The separation surface 4 passes through the opening from the rear side of the airtight partition web 6. The ring-like structure at its bottom fits against the rear side wall of the airtight partition web 6. The separation surface 4 has an axially open pipeline channel for the pipeline connector 3 to pass through.

[0008] The reinforcing member 5 is a ring-shaped structure, which is fixed to the machined part on the front side of the opening of the airtight partition web 6 by non-removable fasteners. It is used to reinforce the pipeline opening of the airtight partition web 6. The reinforcing member 5 is connected to the ring-like structure at the bottom of the separation surface 4 by the support plate nut 15, which fixes the separation surface 4 on the airtight partition web 6. The support plate nut 15 has a certain amount of free movement, which is used for the separation surface 4 to adapt to the deformation of the pipeline 1.

[0009] The pipe connector 3 has one end inserted into the pipe channel of the separation surface 4 and through the airtight partition web 6, and the pipe connector 3 is fixedly connected to the inner wall of the separation surface 4. The other end of the pipe connector 3 is connected to the pipe 1 through the aluminum alloy flexible clamp 2. The aluminum alloy flexible clamp 2 allows the pipe connector 3 to swing within a certain angle, which is used to release the circumferential displacement of the opening area of ​​the airtight partition web 6.

[0010] The annular support A9 and annular support B10 are both semi-annular and are connected by detachable fasteners to form an annular support. They are fitted onto the pipeline 1 and located in front of the aluminum alloy flexible clamp 2. The annular support A9 is on top and the annular support B10 is on the bottom. The outer wall of the annular support B10 is symmetrically provided with two double-ear structures.

[0011] The rubber support A7 and rubber support B8 are disposed inside the support composed of annular support A9 and annular support B10, and are used to fix the pipeline 1 inside the annular support A9 and annular support B10, and to enable the pipeline 1 to move axially.

[0012] The support rod 11 consists of two identical structures. One end of each support rod 11 is equipped with a rod end spherical bearing A12, which is connected to the two double-ear structures of the annular support B10. The other end of each support rod 11 is equipped with a rod end spherical bearing B13, which is connected to a double-ear support 14. The double-ear support 14 is then connected to the surrounding structure to provide support for the pipeline 1.

[0013] Furthermore, adjust the distance between the aluminum alloy flexible clamp 2 and the pipe joint 3, or select an aluminum alloy flexible clamp 2 model with a suitable swing range to meet the release of circumferential displacement when pressurizing or depressurizing the opening area of ​​the airtight partition web 6.

[0014] Furthermore, one rubber support A7 is installed on the inner wall of the annular support A9, and two rubber supports B8 are installed on the inner wall of the annular support B10. Both rubber supports A7 and B8 are T-shaped. The protruding part of rubber support A7 passes through the axis of pipe 1 and contacts the line of pipe 1. The protruding part of rubber support B8 is arranged on the opposite side to provide necessary support for pipe 1.

[0015] Furthermore, the rubber support A7 and rubber support B8 are installed inside the annular support A9 or annular support B10 by detachable fasteners, so that they can be replaced when worn.

[0016] Furthermore, the mid-surface of the double-ear structure of the annular support B10 and the mid-surface of the double-ear support 14 pass through the axis of the pipe 1 and are arranged symmetrically.

[0017] Furthermore, the rod end spherical bearing A 12 and the rod end spherical bearing B13 are respectively connected to the annular support B10 and the double-ear support 14 by detachable bolts.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention has low manufacturing and installation precision requirements:

[0020] Since the annular support and the double-eared support are connected by a strut with rod end spherical bearings installed at both ends, the strut can be installed normally when the angle between the mid-surface of the double-eared support and the mid-surface of the double-eared structure of the annular support is within the range of rotation of the spherical bearings at both ends of the strut around the axis of the strut, thus reducing the manufacturing and assembly requirements of the double-eared support.

[0021] Because the aluminum alloy flexible clamp has a certain swing range, even when the annular support and the pipeline and the pipeline joint are not coaxial, they can still be connected normally within the swing range of the clamp, which reduces the manufacturing and assembly requirements of the annular support.

[0022] 2. Improved the fatigue resistance, safety, and service life of the pipeline:

[0023] Because this invention allows the pipeline to move axially, it releases the directional displacement of the connection structure in the open area of ​​the airtight bulkhead web during cabin depressurization and decompression. Furthermore, because the pipeline and pipeline joints are flexibly connected using aluminum alloy flexible clamps, the circumferential displacement of the connection structure in the open area of ​​the airtight bulkhead web during cabin depressurization and decompression is released within the swing range of the flexible clamps. This prevents stress accumulation in the pipeline due to the displacement of the connection structure in the open area of ​​the airtight bulkhead web during cabin depressurization and decompression, thus improving the pipeline's fatigue resistance.

[0024] Because rubber supports can provide flexible support for pipelines and absorb vibrations caused by non-uniform flow of fluid inside the pipeline, they protect the pipeline from fatigue damage caused by vibration, thereby improving the safety and service life of the pipeline.

[0025] 3. Compact structure and mature technology. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall scheme of the present invention.

[0027] Figure 2 This is a detailed diagram of the connection scheme between the rubber support and the annular support of the present invention.

[0028] Figure 3 This is a side view of the connection scheme at the strut of the present invention.

[0029] In the diagram: 1. Pipeline; 2. Aluminum alloy flexible clamp; 3. Pipeline joint; 4. Separation surface; 5. Reinforcing member; 6. Airtight partition web; 7. Rubber support A; 8. Rubber support B; 9. Annular support A; 10. Annular support B; 11. Support rod; 12. Rod end spherical bearing A; 13. Rod end spherical bearing B; 14. Double ear support; 15. Support plate nut. Detailed Implementation

[0030] The invention will now be described in further detail, but this should not be construed as limiting the invention in any way.

[0031] A flexible connection and support structure for large-diameter pipes in an airtight partition frame is disclosed. The flexible connection and support structure includes a pipe 1, an aluminum alloy flexible clamp 2, a pipe joint 3, a separation surface 4, a reinforcing member 5, an airtight partition frame web 6, a rubber support A 7, a rubber support B 8, an annular support A 9, an annular support B10, a strut 11, a strut end spherical bearing A 12, a strut end spherical bearing B13, a double-ear support 14, and a support plate nut 15.

[0032] like Figure 1 As shown, the separation surface 4 is a cylindrical structure with a ring-like structure at its bottom. The separation surface 4 passes through the opening from the back side of the airtight partition web 6. The ring-like structure at its bottom fits into the airtight partition web 6. The separation surface 4 has an axially open pipeline channel for the pipeline connector 3 to pass through.

[0033] like Figure 1 As shown, the reinforcing member 5 is a ring-shaped structure, which is fixed to the machined part on the front side of the opening of the airtight partition web 6 by non-removable fasteners. It is used to reinforce the pipeline opening of the airtight partition web 6. The reinforcing member 5 is connected to the separation surface 4 by the support plate nut 15, which fixes the separation surface 4 on the airtight partition web 6. The support plate nut 15 has a certain amount of movement, which is used for the separation surface 4 to adapt to the deformation of the pipeline 1.

[0034] like Figure 1 As shown, one end of the pipe connector 3 is inserted into the pipe channel of the separation surface 4 and passes through the airtight partition web 6, and the pipe connector 3 is fixedly connected to the inner wall of the separation surface 4. The other end of the pipe connector 3 is connected to the pipe 1 through the aluminum alloy flexible clamp 2. The aluminum alloy flexible clamp 2 allows the pipe connector 3 to swing within a certain angle, which is used to release the circumferential displacement of the opening area of ​​the airtight partition web 6.

[0035] like Figure 2As shown, both the annular support A9 and the annular support B10 are semi-annular and are connected by detachable fasteners to form an annular support. The support is fitted onto the pipe 1 and is located in front of the aluminum alloy flexible clamp 2. The annular support A9 is on top and the annular support B10 is on the bottom. The outer wall of the annular support B10 is symmetrically provided with two double-ear structures, and the middle surface of the double-ear structure of the annular support B10 passes through the axis of the pipe 1.

[0036] like Figure 2 As shown, one rubber support A7 is installed on the inner wall of the annular support A9 by a detachable fastener, and two rubber supports B8 are installed on the inner wall of the annular support B10 by detachable fasteners. They are used to fix the pipeline 1 in the annular support A9 and the annular support B10 and to enable the pipeline 1 to move axially. Both rubber supports A7 and B8 are T-shaped. The protruding part of rubber support A7 passes through the axis of the pipeline 1 and is in line contact with the pipeline 1. The protruding parts of rubber support B8 are arranged on opposite sides to provide necessary support for the pipeline 1.

[0037] like Figure 3 As shown, there are two identical support rods 11. One end of each support rod 11 is equipped with a rod end spherical bearing A12, which is connected to the two double-ear structures of the annular support B10. The other end of each support rod 11 is equipped with a rod end spherical bearing B13, which is connected to a double-ear support 14. The two double-ear supports 14 are then connected to the peripheral structure to support the pipeline 1. The mid-surface of the two double-ear supports 14 passes through the axis of the pipeline 1.

[0038] The above-described embodiments are merely illustrative of the implementation methods of the present invention, but should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A flexible connection and support structure for large-diameter pipelines with an airtight partition frame, characterized in that, The flexible connection and support structure includes a pipeline (1), an aluminum alloy flexible clamp (2), a pipeline joint (3), a separation surface (4), a reinforcing member (5), an airtight partition web (6), a rubber support A (7), a rubber support B (8), an annular support A (9), an annular support B (10), a strut (11), a rod end spherical bearing A (12), a rod end spherical bearing B (13), a double-ear support (14), and a support plate nut (15). The separation surface (4) is a cylindrical structure with a ring-shaped structure at the bottom. The separation surface (4) passes through the opening from the back side of the airtight partition web (6). The ring-shaped structure at the bottom is attached to the back wall of the airtight partition web (6). The separation surface (4) has an axial pipe channel for the pipe joint (3) to pass through. The reinforcing member (5) is a ring structure and is fixed to the machined part on the front side of the opening of the airtight partition web (6) to reinforce the pipeline opening of the airtight partition web (6). The reinforcing member (5) is connected to the separation surface (4) through the support plate nut (15) to fix the separation surface (4) on the airtight partition web (6). The pipe joint (3) has one end inserted into the pipe channel of the separation surface (4) and through the airtight partition web (6), and the pipe joint (3) is fixedly connected to the inner wall of the separation surface (4). The other end of the pipe joint (3) is connected to the pipe (1) through the aluminum alloy flexible clamp (2). The aluminum alloy flexible clamp (2) allows the pipe joint (3) to swing within a certain angle, which is used to release the circumferential displacement of the opening area of ​​the airtight partition web (6). The ring support A (9) and ring support B (10) are both semi-circular and are fixedly connected to form a ring support. They are fitted on the pipeline (1) and located in front of the aluminum alloy flexible clamp (2). The ring support A (9) is on top and the ring support B (10) is on the bottom. The outer wall of the ring support B (10) is symmetrically provided with two double ear structures. The rubber support A (7) and rubber support B (8) are arranged inside the support composed of annular support A (9) and annular support B (10) to fix the pipeline (1) inside the annular support A (9) and annular support B (10) and enable the pipeline (1) to move axially. The support rod (11) has two identical structures. One end of each support rod (11) is equipped with a rod end spherical bearing A (12). The two rod end spherical bearings A (12) are connected to the two double-ear structures of the annular support B (10). The other end of each support rod (11) is equipped with a rod end spherical bearing B (13). The two rod end spherical bearings B (13) are connected to double-ear supports (14). The two double-ear supports (14) are then connected to the peripheral structure to support the pipeline (1). Adjust the distance between the aluminum alloy flexible clamp (2) and the pipe joint (3) to meet the release of circumferential displacement when the opening area of ​​the airtight partition web (6) is pressurized or depressurized; Select an aluminum alloy flexible clamp (2) model with a suitable swing range to meet the release of circumferential displacement when pressurizing or depressurizing the opening area of ​​the web plate (6) of different airtight partitions; One rubber support A (7) is installed on the inner wall of the annular support A (9), and two rubber supports B (8) are installed on the inner wall of the annular support B (10). Both rubber supports A (7) and rubber supports B (8) are T-shaped. The protruding part of rubber support A (7) passes through the axis of the pipeline (1) and contacts the pipeline (1). The protruding part of rubber support B (8) is arranged on the opposite side to provide necessary support for the pipeline (1).

2. The flexible connection and support structure for large-diameter pipelines with airtight partitions according to claim 1, characterized in that, The rubber support A (7) and rubber support B (8) are installed on the inner side of the annular support A (9) or the annular support B (10) by detachable fasteners, so that they can be replaced when worn.

3. The flexible connection and support structure for large-diameter pipelines with airtight partitions according to claim 1, characterized in that, The inner surface of the double-ear structure of the ring support B (10) and the inner surface of the double-ear support (14) pass through the axis of the pipeline (1) and are arranged symmetrically.

4. The flexible connection and support structure for large-diameter pipelines with airtight partitions according to claim 1, characterized in that, The plate nut (15) has a certain amount of free movement, which is used to adapt the separation surface (4) to the deformation of the pipeline (1).

5. The flexible connection and support structure for large-diameter pipelines with airtight partitions according to claim 1, characterized in that, The rod end spherical bearing A (12) and rod end spherical bearing B (13) are respectively connected to the annular support B (10) and the double-ear support (14) by detachable bolts.

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