Flexible detachable pipeline via hole sealing structure

Abstract

The invention discloses a flexible detachable pipeline via hole sealing structure, and belongs to the field of pipeline design. Comprising an equipment shell, a corrugated pipe assembly, a sealing sleeve, a heat-shrinkable sleeve and a pipeline. The two ends of the corrugated pipe assembly are each provided with a sealing structure, one sealing structure is connected with the installation face of the equipment shell, and the other sealing structure is connected with the installation face of the flange of the sealing sleeve. The sealing sleeve sleeves the pipeline, and a gap between the outer surface of the pipeline and the inner surface of the sealing sleeve is filled with sealant. The two ends of the sealing sleeve are each sleeved with a heat-shrinkable sleeve, and after the pipeline sealing position is determined, the heat-shrinkable sleeves are heated to be retracted. Through hole sealing of a pipeline with certain movement relative to the shell at the through hole can be achieved, and the permitted movement freedom degree is high. A moving part and a sealing part are independent, and the static sealing structure is good in sealing performance, high in reliability and long in service life. The detachable structural design facilitates later pipeline maintenance.

Description

Technical Field

[0001] The present invention belongs to the field of pipeline design, and particularly relates to a flexible detachable pipeline through-hole sealing structure. Background Art

[0002] With the continuous development of the aviation industry, the application of wire harnesses and pipe bundles in aviation products is becoming increasingly common, and the requirements for the protection, fixation, and sealing of wire harness through-holes are constantly increasing. During flight, an aircraft faces various complex environmental conditions, such as vibration, shock, high temperature, humidity, and low air pressure. The through-hole sealing structure of aviation equipment is crucial for preventing external water, dust, oil, etc. from entering the equipment and ensuring the normal operation and service life of the equipment.

[0003] For equipment with a vibration damping system, a moving function, or some pipelines that generate stress and strain, there will be a certain relative movement between the connection of the wire harness and the pipe bundle on the equipment and the housing of the through-hole. When restricted by the limited space inside the equipment and the relatively rigid texture of the pipeline, and unable to be compensated by the pipeline itself, a certain degree of mobility is required at the through-hole seal of the pipeline. The traditional fixed through-hole sealing structure cannot meet the requirements. Currently, the method to solve such problems is to use a floating seal at the through-hole. This sealing structure can achieve the sealing between relative moving parts, but it has disadvantages such as high processing accuracy requirements, low sealing degree, low freedom of movement, and the need for lubrication.

[0004] The existing floating through-hole sealing structure can achieve the sealing between relative moving parts, but it has disadvantages such as high processing accuracy requirements for the sealing surface, poor sealing performance, low freedom of movement (generally 2), and the need for lubrication. The present invention proposes a detachable flexible through-hole sealing structure, which uses the deformability of the bellows to achieve relative movement compensation, and has a high freedom of movement, up to 5. Since its movement position and sealing position are independent, the sealing performance and sealing reliability are high, and the static sealing structure has relatively low requirements for processing accuracy. Summary of the Invention

[0005] The present invention proposes a pipeline and wire harness through-hole sealing structure based on the bellows structure, providing a reliable solution for the pipeline sealing requirements where it is inconvenient to set up plug-in connection structures and a certain relative movement of the pipeline or wire harness at the through-hole is required. At the same time, this sealing structure is detachable, facilitating the assembly and maintenance of the pipeline.

[0006] The solution proposed by the present invention is as follows:

[0007] A flexible detachable pipeline through-hole sealing structure, comprising an equipment housing 1, a bellows assembly 2, a sealing sleeve 3, a heat shrinkable sleeve 5, and a pipeline 10.

[0008] At both ends of the bellows assembly 2, there is a sealing structure. One sealing is with the mounting surface of the equipment housing 1, and the other sealing is with the mounting surface of the flange of the sealing sleeve 3.

[0009] The sealing sleeve 3 is sleeved outside the pipeline 10, and the gap between the outer surface of the pipeline 10 and the inner surface of the sealing sleeve 3 is filled with sealant. At both ends of the sealing sleeve 3, a section of heat shrinkable sleeve 5 is sleeved respectively. After determining the sealing position of the pipeline 10, heat the heat shrinkable sleeve 5 to make it shrink back.

[0010] Furthermore, the bellows assembly 2 includes a large flange 21, a small flange 23 and a bellows 22. The two ends of the bellows 22 are respectively fixed to the inner ends of the large flange 21 and the small flange 23. A sealing groove A221 is provided on the outer end mounting surface of the large flange 21 for placing a sealing ring A6 to achieve sealing with the equipment housing 1.

[0011] Even further, the large flange 21, the small flange 23 and the bellows 22 can be integrally formed or each part can be formed by a welding process.

[0012] Further, there are two holes opened on the barrel wall of the sealing sleeve 3. One is a glue injection hole 34, and the other is a glue overflow hole 33. Sealant is injected from the glue injection hole 34. After filling the gap between the outer surface of the pipeline 10 and the inner surface of the sealing sleeve 3, the sealant overflows from the glue overflow hole 33.

[0013] Further, a flange is provided in the middle of the sealing sleeve 3, and is connected to the small flange 23 in the bellows assembly 2 through a bolt assembly B9 to achieve sealing.

[0014] Further, according to the use and maintenance requirements of the pipeline:

[0015] When the sealing sleeve 3 is installed inside the bellows assembly 2, there are a plurality of threaded holes 32 on the flange of the sealing sleeve 3, and a sealing groove B31 is provided for placing a sealing ring B8;

[0016] When the sealing sleeve 3 is installed outside the bellows assembly 2, a sealing groove is provided on the outer end face of the small flange 23 for placing a sealing ring B8. The sealing groove B31 of the sealing sleeve 3 is cancelled, and there are a plurality of through holes on the flange of the sealing sleeve 3.

[0017] Advantages of the present invention:

[0018] 1) It can achieve the through-hole sealing with a certain movement of the pipeline relative to the housing at the through-hole, allowing a high degree of freedom of movement.

[0019] 2) The moving parts and the sealing parts are independent. The static sealing structure has good sealing performance, high reliability and long service life.

[0020] 3) The detachable structure design is convenient for the later maintenance of the pipeline. Description of the Drawings

[0021] Figure 1 This is a sectional view of a flexible detachable pipeline through-hole sealing structure of the present invention.

[0022] Figure 2 This is a three-dimensional view of a flexible detachable pipeline through-hole sealing structure of the present invention.

[0023] Figure 3 This is a sectional view of the bellows assembly of the present invention.

[0024] Figure 4 This is a sectional view of the sealing sleeve.

[0025] Figure 5 This is a schematic diagram of another installation form of the cooperation between the bellows assembly and the sealing sleeve.

[0026] In the figure: equipment housing 1, bellows assembly 2, sealing sleeve 3, wedge-shaped pad 4, heat-shrinkable sleeve 5, sealing ring A 6, bolt assembly A 7, sealing ring B 8, bolt assembly B 9, pipeline 10, large flange 21, bellows 22, small flange 23, sealing groove A 221, sealing groove B 31, threaded hole 32, glue overflow hole 33, glue injection hole 34. Specific implementation manner

[0027] The technical solution of the present invention will be further described below according to the drawings and embodiments.

[0028] 1. The bellows assembly 2 includes 1 large flange 21, 1 small flange 23 and the bellows 22. The large flange 21 and the small flange 23 are respectively fixed at both ends of the bellows 22, and can be integrally formed or formed by a welding process. A sealing groove A 221 is provided on the mounting surface of the large flange 21 for placing the sealing ring A 6. Threaded holes are provided on the equipment housing 1 and the large flange 21, and the bolt assembly A 7 is used in cooperation with the sealing ring A 6 to realize the fixation and sealing with the equipment housing 1.

[0029] 2. The middle of the sealing sleeve 3 is provided with a flange, and there are a plurality of threaded holes 32 on the flange, and a sealing groove B 31 is provided for placing the sealing ring B 8, and the sealing is realized by connecting with the small flange 23 in the bellows assembly 2 through the bolt assembly B 9. A glue injection hole 34 and a glue overflow hole 33 are opened on the cylinder body of the sealing sleeve 3.

[0030] 3. Installation process of the sealing sleeve 3: The sealing sleeve 3 and two sections of heat-shrinkable sleeves 5 are sleeved on the pipeline 10. Wedge-shaped pads 4 can be inserted at both ends of the sealing sleeve 3 to keep the pipeline 10 centered. After determining the installation position of the sealing sleeve 3, heat the two sections of heat-shrinkable sleeves 5. After the heat-shrinkable sleeves 5 are heated and shrunk, both ends of the sealing sleeve 3 will be sealed. Next, inject glue. Inject sealing glue from the glue injection hole 34 until it overflows from the glue overflow hole 33 and then stop injecting glue. After waiting for the sealing glue to cure, install and fix the sealing sleeve 3 with the small flange 23 in the bellows assembly 2.

[0031] 4. According to the pipeline use and maintenance requirements, the sealing sleeve 3 can be installed outside the bellows assembly 2. At this time, a sealing groove is provided on the outer end face of the small flange 23, the sealing groove B31 of the sealing sleeve 3 is cancelled, and the threaded hole 32 is changed to a through hole.

Claims

1. A flexible and detachable pipeline through-hole sealing structure, characterized in that, It includes a device housing (1), a bellows assembly (2), a sealing sleeve (3), a heat-shrinkable sleeve (5), and a pipeline (10); Each end of the bellows assembly (2) is provided with a sealing structure, one for sealing with the mounting surface of the device housing (1), and the other for sealing with the mounting surface of the flange of the sealing sleeve (3); The sealing sleeve (3) is sleeved outside the pipeline (10), and the gap between the outer surface of the pipeline (10) and the inner surface of the sealing sleeve (3) is filled with sealant; A section of heat-shrinkable sleeve (5) is sleeved at each end of the sealing sleeve (3). After determining the sealing position of the pipeline (10), the heat-shrinkable sleeve (5) is heated to make it contract.

2. The flexible detachable pipeline through-hole sealing structure according to claim 1, characterized in that, The bellows assembly (2) includes a large flange (21), a small flange (23), and a bellows (22). The two ends of the bellows (22) are respectively fixed to the inner ends of the large flange (21) and the small flange (23). A sealing groove A (221) is provided on the outer end mounting surface of the large flange (21) for placing a sealing ring A (6) to achieve sealing with the device housing (1).

3. A flexible detachable pipeline through-hole sealing structure according to claim 2, characterized in that, The large flange (21), the small flange (23), and the bellows (22) can be integrally formed or each part can be formed by a welding process.

4. A flexible detachable pipeline through-hole sealing structure according to claim 1, characterized in that, Two holes are opened on the wall of the sealing sleeve (3), one is a glue injection hole (34), and the other is a glue overflow hole (33). Sealant is injected from the glue injection hole (34). After filling the gap between the outer surface of the pipeline (10) and the inner surface of the sealing sleeve (3), the sealant overflows from the glue overflow hole (33).

5. A flexible detachable pipeline through-hole sealing structure according to claim 1, characterized in that A flange is provided in the middle of the sealing sleeve (3), and it is connected to the small flange (23) in the bellows assembly (2) through a bolt assembly B (9) to achieve sealing.

6. A flexible and detachable pipeline through-hole sealing structure according to claim 1, characterized in that According to the use and maintenance requirements of the pipeline: When the sealing sleeve (3) is installed inside the bellows assembly (2), there are multiple threaded holes (32) on the flange of the sealing sleeve (3), and a sealing groove B (31) is provided for placing a sealing ring B (8); When the sealing sleeve (3) is installed outside the bellows assembly (2), a sealing groove is provided on the outer end face of the small flange (23) for placing a sealing ring B (8). The sealing groove B (31) of the sealing sleeve (3) is cancelled, and there are multiple through holes on the flange of the sealing sleeve (3).

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