Corrugated protective sleeve for aerospace

Abstract

The utility model relates to the technical field of bellows, disclose a kind of bellows protective sleeve for aerospace, it is installed between two pipelines by multiple fasteners, one end of the pipeline has flange, the flange has multiple disc holes, bellows protective sleeve includes: bellows, it has telescopic displacement effect, the both ends of its have connecting portion, the connecting portion has multiple mounting holes on;The utility model, the inner wall of first inner sleeve is provided with two sealing rings, two sealing rings are all sealed and connected on second inner sleeve, so that sliding seal assembly has the effect of telescopic sliding with bellows, also has sealing effect, reduce the phenomenon that turbulence occurs in the process that fluid is transported in the first inner sleeve and second inner sleeve of bellows, also avoid the case that impurities in fluid are more easily gathered in bellows when bellows is vertical, guarantee the normal use of bellows.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe technology, and in particular to a corrugated protective sleeve for aerospace applications. Background Technology

[0002] Corrugated protective sleeves for aerospace applications are mostly made of high-temperature resistant, radiation-resistant, and corrosion-resistant metal materials. They utilize the elastic deformation of the corrugated pipe to absorb the displacement and stress caused by thermal expansion and contraction, installation deviations, etc., and can achieve expansion and contraction within a limited space to adapt to the vibration, displacement, or complex path of the equipment.

[0003] It was discovered that, for example Figure 1 As shown, in a common metal bellows compensator (also known as a bellows expansion joint), an inner sleeve is welded to the inner wall of one end of the metal bellows. The other end of the inner sleeve is not welded to the other end of the inner wall of the metal bellows, allowing the metal bellows to expand and contract. If the two ends of the inner sleeve are welded to the two ends of the inner wall of the metal bellows, the metal bellows will not have the ability to compensate for expansion and contraction. The inner sleeve is mainly designed to ensure that the medium can be transported smoothly and will not generate turbulence with the bellows. If the side of the inner sleeve without welds faces the direction of medium flow, the fluid will enter the bellows and generate turbulence, and impurities in the fluid will accumulate in the bellows, affecting the fluid transport and the normal operation of the bellows. Figure 2 When the end of the inner sleeve of the metal bellows without welds is vertical, impurities in the fluid are more likely to accumulate in the metal bellows, which makes the practicality of the metal bellows need to be improved. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a corrugated protective sleeve for aerospace applications, which solves the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A corrugated protective sleeve for aerospace applications is installed between two pipes by multiple sets of fasteners. One end of each pipe has a flange with multiple perforations. The corrugated protective sleeve comprises:

[0007] A bellows, which has the function of expansion and contraction displacement, has a connecting part at both ends, and the connecting part has multiple mounting holes;

[0008] A sliding sealing assembly is disposed on the inner wall of the bellows. The sliding sealing assembly has the function of sliding along with the bellows as it expands and contracts, and at the same time has a sealing effect.

[0009] Preferably, the fastener includes:

[0010] Bolt; one end of which passes through the flange hole at one end of the pipe and the mounting hole at the connection part at one end of the bellows.

[0011] The first nut; its threads are installed on one end of the bolt.

[0012] Preferably, the sliding sealing assembly includes:

[0013] The first inner sleeve is fixedly installed on the inner wall of one end of the bellows. The first inner sleeve has a cavity, and the inner wall of the cavity has two mounting grooves.

[0014] The second inner sleeve is fixedly installed on the inner wall of the other end of the bellows, and one end of it is movably embedded in the cavity of the first inner sleeve.

[0015] Two sealing rings are respectively set in two mounting grooves in the cylinder cavity, and both sealing rings are sealed and fitted onto the second inner sleeve.

[0016] Preferably, the sealing ring can be a fluororubber sealing ring, which provides high temperature resistance, radiation resistance, and corrosion resistance.

[0017] Preferably, each end of the corrugated pipe has multiple side lugs, each side lug having a side hole. The corresponding side lugs on the end of the corrugated pipe are connected by a guide assembly, which is used to guide the expansion and contraction of the corrugated pipe.

[0018] Preferably, the guiding component includes:

[0019] The guide rod has threaded grooves at both ends and passes through the side holes on the corresponding side ears at both ends of the bellows.

[0020] Two circular baffles are fixedly mounted on the guide rod;

[0021] Two second nuts; each is threaded onto the threaded grooves at both ends of the guide rod.

[0022] Preferably, the threaded grooves at both ends of the guide rod have opposite thread directions, and the two second nuts are respectively adapted to the threaded grooves at both ends of the guide rod.

[0023] This application provides a sliding sealing assembly on the inner wall of a bellows. A first inner sleeve is fixedly welded to the inner wall of one end of the bellows, and a second inner sleeve is fixedly welded to the inner wall of the other end of the bellows, allowing the second inner sleeve to slide against the first inner sleeve. Simultaneously, two sealing rings are provided on the inner wall of the first inner sleeve, both of which are sealed and fitted onto the second inner sleeve. This allows the sliding sealing assembly to slide and extend with the bellows while also providing a sealing effect. This reduces turbulence during fluid transport within the first and second inner sleeves of the bellows and also prevents impurities in the fluid from accumulating inside the bellows when it is vertical, ensuring the normal operation of the bellows. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of the present invention from a first planar perspective;

[0025] Figure 2 This is a structural schematic diagram of the present invention from a second planar perspective;

[0026] Figure 3 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 4 This is a partial cross-sectional structural diagram of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the present invention in cross-section of the third plane;

[0029] Figure 6 This is a partial cross-sectional view of the structure of this utility model from a first explosion perspective;

[0030] Figure 7 This is a partial cross-sectional view of the structure of this utility model from a second explosion perspective.

[0031] In the figure: 100, bellows; 101, connecting part; 1011, side lug; 200, sliding sealing assembly; 201, first inner sleeve; 2011, cylinder cavity; 2012, mounting groove; 202, second inner sleeve; 203, sealing ring; 300, pipe; 301, flange; 400, fastener; 401, bolt; 402, first nut; 500, guide assembly; 501, guide rod; 5011, threaded groove; 502, circular baffle; 503, second nut. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] To address the issues of traditional metal bellows where the seamless inner sleeve at one end faces the flow direction of the medium, causing turbulence and impurities to accumulate inside, thus affecting fluid transport and normal operation, and further exacerbating the problem when the seamless inner sleeve is vertical, impurities are more easily trapped within the bellows, thus hindering its practicality, this embodiment discloses an aerospace-grade corrugated protective sleeve. This sleeve is installed between two pipes 300 using multiple sets of fasteners 400. The corrugated protective sleeve includes, as shown in the following... Figure 3 The bellows 100 and sliding sealing assembly 200 are shown.

[0034] like Figure 3 As shown, one end of the pipe 300 has a flange 301 with multiple flange holes, and both ends of the bellows 100 have connecting portions 101 with multiple mounting holes; the fastener 400 includes a bolt 401 and a first nut 402; one end of the bolt 401 passes through the flange hole on one end of the pipe 300 and the mounting hole on the connecting portion 101 on one end of the bellows 100 and is threaded with the first nut 402; thus, the bellows 100 is installed at the ends of the two pipes 300 that are close to each other.

[0035] like Figure 7As shown, the sliding sealing assembly 200 is disposed on the inner wall of the bellows 100; the sliding sealing assembly 200 includes: a first inner sleeve 201, a second inner sleeve 202, and two sealing rings 203; the first inner sleeve 201 is fixedly installed on the inner wall of one end of the bellows 100, and the first inner sleeve 201 has a cavity 2011, the inner wall of the cavity 2011 having two mounting grooves 2012; the second inner sleeve 202 is fixedly installed on the inner wall of the other end of the bellows 100, and one end of its portion is movably embedded in the cavity 2011 of the first inner sleeve 201, so that the second inner sleeve 202 and the first inner sleeve 201 can be slidably connected; the two sealing rings 203 03 are respectively installed in the two mounting slots 2012 of the cylinder cavity 2011. The two sealing rings 203 are sealed and fitted on the second inner sleeve 202. The sealing rings 203 can be fluororubber sealing rings, which play a role in high temperature resistance, radiation resistance and corrosion resistance. This allows the sliding sealing assembly 200 to slide with the bellows 100 while also having a sealing effect. This reduces the phenomenon of turbulence in the process of fluid transportation in the first inner sleeve 201 and the second inner sleeve 202 of the bellows 100. It also avoids the situation where impurities in the fluid are more likely to accumulate in the bellows 100 when the bellows 100 is vertical, thus ensuring the normal use of the bellows 100.

[0036] Continue as Figure 7 As shown, the connecting portions 101 at both ends of the bellows 100 each have a plurality of side ears 1011, and the side ears 1011 have side holes. The corresponding side ears 1011 on the connecting portions 101 at both ends of the bellows 100 are connected by a guide assembly 500, which is used to guide the expansion and contraction of the bellows 100.

[0037] like Figure 6 As shown, the guide assembly 500 includes: a guide rod 501, two circular baffles 502, and two second nuts 503; both ends of the guide rod 501 have threaded grooves 5011, and the threads of the threaded grooves 5011 at both ends of the guide rod 501 have opposite directions. Both ends of the guide rod 501 pass through the side holes on the corresponding side ears 1011 at both ends of the bellows 100 and are respectively threaded with second nuts 503. The two second nuts 503 are respectively adapted to the threaded grooves 5011 at both ends of the guide rod 501. The two circular baffles 502 are fixedly installed on the guide rod 501. The circular baffles 502 are used to limit the side ears 1011 on the connecting part 101 of the bellows 100, so that the side ears 1011 on the connecting part 101 at both ends of the bellows 100 can only slide within a certain distance between the second nuts 503 and the circular baffles 502 on the guide rod 501.

[0038] This application provides a sliding sealing assembly 200 on the inner wall of the bellows 100. A first inner sleeve 201 is fixedly welded to the inner wall of one end of the bellows 100, and a second inner sleeve 202 is fixedly welded to the inner wall of the other end of the bellows 100, so that the second inner sleeve 202 and the first inner sleeve 201 can be slidably connected. At the same time, two sealing rings 203 are provided on the inner wall of the first inner sleeve 201, and both sealing rings 203 are sealed and fitted onto the second inner sleeve 202. This allows the sliding sealing assembly 200 to slide and extend with the bellows 100, while also providing a sealing effect. This reduces the turbulence phenomenon that occurs during the transportation of fluid in the first inner sleeve 201 and the second inner sleeve 202 of the bellows 100, and also prevents impurities in the fluid from accumulating more easily in the bellows 100 when the bellows 100 is vertical, thus ensuring the normal use of the bellows 100.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An aerospace-grade corrugated protective sleeve, installed between two pipes (300) by a plurality of fasteners (400), one end of each pipe (300) having a flange (301) having a plurality of holes, characterized in that, Corrugated protective sleeve includes: A bellows (100) has a telescopic displacement function, and both ends of the bellows have a connecting part (101), and the connecting part (101) has a plurality of mounting holes; A sliding sealing assembly (200) is disposed on the inner wall of the bellows (100). The sliding sealing assembly (200) has the function of sliding along with the bellows (100) to extend and retract, and at the same time has a sealing effect.

2. The aerospace corrugated protective sleeve of claim 1, wherein, The fastener (400) includes: Bolt (401); one end of which passes through the disc hole on the flange (301) at one end of the pipe (300) and the mounting hole on the connecting part (101) at one end of the bellows (100); The first nut (402) is threaded onto one end of the bolt (401).

3. The aerospace corrugated protective sleeve of claim 1, wherein, The sliding seal assembly (200) includes: The first inner sleeve (201) is fixedly installed on the inner wall of one end of the bellows (100). The first inner sleeve (201) has a cavity (2011), and the inner wall of the cavity (2011) has two mounting grooves (2012). The second inner sleeve (202) is fixedly installed on the inner wall of the other end of the bellows (100), and one end of it is movably embedded in the cavity (2011) of the first inner sleeve (201). Two sealing rings (203) are respectively installed in two mounting grooves (2012) of the cylinder cavity (2011), and both sealing rings (203) are sealed and fitted on the second inner sleeve (202).

4. The aerospace corrugated protective sleeve of claim 3, wherein, The sealing ring (203) can be a fluororubber sealing ring, which can be resistant to high temperature, radiation and corrosion.

5. The aerospace-grade corrugated protective sleeve according to claim 1, characterized in that, The corrugated pipe (100) has multiple side ears (1011) on the connecting parts (101) at both ends. Each side ear (1011) has a side hole. The corresponding side ears (1011) on the connecting parts (101) at both ends of the corrugated pipe (100) are connected by a guide assembly (500). The guide assembly (500) is used to guide the expansion and contraction of the corrugated pipe (100).

6. The aerospace corrugated protective sleeve of claim 5, wherein, The guide assembly (500) includes: The guide rod (501) has threaded grooves (5011) at both ends, and it passes through the side holes on the corresponding side ears (1011) at both ends of the bellows (100); Two circular baffles (502) are fixedly mounted on the guide rod (501); Two second nuts (503); which are threaded onto the threaded grooves (5011) at both ends of the guide rod (501).

7. The aerospace corrugated protective sleeve of claim 6, wherein, The threads of the threaded grooves (5011) at both ends of the guide rod (501) are turned in opposite directions, and the two second nuts (503) are respectively adapted to the threaded grooves (5011) at both ends of the guide rod (501).

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