Cable through-wall sealing assembly

Abstract

The invention relates to a cable through-wall sealing assembly which comprises a main body part and a clamping ring, the main body part partially penetrates through a threading hole of a rib plate in the first direction of cable extension, the main body part is provided with a plurality of wire holes corresponding to a plurality of wires of a cable in the first direction, the inner circumferential face of the clamping ring surrounds and abuts against the outer circumferential face of the main body part, and the inner circumferential face of the clamping ring abuts against the outer circumferential face of the main body part. The side surface of the snap ring abuts against and is fixed to the rib plate.

Description

Technical Field

[0001] The present invention relates to a cable wall-penetrating sealing assembly, which allows a fuel measuring cable in an aircraft fuel tank to pass through a sealing rib in a sealed manner. The present invention belongs to the technical field of measuring system equipment of an aircraft fuel system. Background Art

[0002] A fuel measurement system cable is usually arranged inside the aircraft fuel tank. The cable is used to collect the electrical signal of the fuel level sensor and transmit it to the computer outside the fuel tank. An aircraft is generally equipped with multiple fuel tanks, which are structurally independent and physically isolated from each other. The fuel measurement cable usually needs to pass through the fuel tank isolation plate, such as the sealing rib plate, to collect the signals in different fuel tanks.

[0003] When the cable passes through the sealing rib of the fuel tank, sealing measures must be taken at the installation position where the cable passes through the through hole of the rib structure.

[0004] In the prior art, typical forms of fuel measurement cable wall sealing are as follows: Figure 1 As shown. The fuel measuring cable consists of a cable sheath (braid) wrapped with several wires. There are gaps between the wires and the cable outer sheath is not sealed, which is susceptible to fuel penetration. In order to ensure the sealing effect of the cable passing through the rib plate, the sealing structure is arranged as follows: 1) Cut and peel off the cable outer sheath of the section where the cable is to pass through the rib plate; 2) Loosen the wires of the cable and inject sealant between the wires; 3) Wrap the section where the wire is injected with sealant with sealing tape; 4) Tighten the two ends of the section where the wire is injected with glue with a cassette to prevent the wire from loosening and the sealant from falling off; 5) Apply sealant to the inner wall of the two semi-cylindrical wall penetration halves to clamp the fuel measuring cable, and splice the two wall penetration halves; 6) Pass the wall penetration through the rib plate and fix it to the rib plate; 7) Fill the space between the wall penetration and the rib plate with sealant to fill the corners and seal.

[0005] However, the existing fuel measuring cable wall sealing structure has the following disadvantages: 1) There is a risk of misoperation when cutting the outer sheath of the fuel measuring cable, which is easy to damage the outer ring wire of the cable without being easy to detect; 2) Cutting the outer sheath of the cable is carried out when the fuel measuring cable has been arranged in the fuel tank. If the wire is damaged due to misoperation during installation, the entire cable needs to be replaced, which is a lot of work; if the damage is found during the on-board ground test of the cable, for example, it is not certain which part of the wire is damaged and causes the wire to be non-conductive, the inspection and replacement workload will be further increased; 3) The space inside the fuel tank is small, and it is difficult to cut the outer sheath of the fuel measuring cable and to inject glue; 4) Over time, the sealant injected between the wires is at risk of aging, which may peel off or fall off the wire, thereby damaging the sealing effect.

[0006] Therefore, there is an urgent need to propose a cable wall sealing assembly with a simple structure and easy installation, which allows the wires of the cable to be protected from damage and improves the installation efficiency of the fuel measuring cable. Summary of the invention

[0007] In view of the above problems in the prior art, the inventor provides a cable wall penetration sealing assembly. During the manufacturing stage of the fuel measuring cable, the wires are sealed and wrapped in advance at the wall penetration location according to the wall penetration position in the fuel tank to eliminate gaps between the wires.

[0008] In a first example of the cable wall sealing assembly, the cable wall sealing assembly includes: a main body, the main body partially passes through the wire hole of the rib plate in a first direction in which the cable extends, the main body having a plurality of wire holes corresponding to a plurality of wires of the cable in the first direction, and a clamp, the inner circumference of the clamp surrounds and abuts against the outer circumference of the main body, and the side of the clamp abuts against the rib plate and is fixed to the rib plate.

[0009] In the second example of the cable wall sealing assembly, optionally including the first example, the clamp ring is composed of two or more clamp ring sub-components spliced ​​together, and the clamp ring sub-component includes a positioning portion on the splicing interface, and the positioning portion includes at least one positioning recessed portion and corresponding at least one positioning protruding portion, which is helpful to realize the splicing of each clamp ring sub-component.

[0010] In the third example of the cable wall sealing assembly, one or more of the first example and the second example may be optionally included, the clamping ring includes an annular sealing ring groove on the side facing the rib plate, and a sealing ring is arranged in the sealing ring groove, which helps to achieve sealing cooperation between the clamping ring and the rib plate.

[0011] In the fourth example of the cable wall sealing assembly, one or more of the first to third examples may be optionally included, the main body is cylindrical, the outer circumference of the main body is provided with an annular snap ring groove, and the inner circumference of the snap ring is provided with an annular snap ring protrusion, and the snap ring protrusion is sealed with the snap ring groove, which helps to achieve good fit and sealing between the snap ring and the rib plate.

[0012] In the fifth example of the cable wall sealing assembly, one or more of the first to fourth examples may be optionally included, the number of snap rings is two, which are respectively arranged on both sides of the rib plate, and the number of snap ring grooves is two, which are used to cooperate with the corresponding snap rings, and the spacing between the two snap ring grooves is equal to the thickness of the rib plate. The axial movement of the cable wall sealing assembly is further restricted, and it is helpful to achieve good fit and sealing between the snap ring and the rib plate.

[0013] In the sixth example of the cable wall sealing assembly, one or more of the first to fifth examples may be optionally included, and the side wall of the clamping ring protrusion of the clamping ring is flush with the side wall of the clamping ring against the rib plate, which is conducive to good fit and sealing between the clamping ring and the rib plate.

[0014] In the seventh example of the cable wall sealing assembly, one or more of the first to sixth examples may be optionally included, and a sealant is filled at the corners of the annular outer wall of the clamp ring and the rib plate to fill the corners and seal, which is helpful for sealing between the clamp ring and the rib plate.

[0015] In the eighth example of the cable wall sealing assembly, optionally including one or more of the first to seventh examples, the main body is made of elastic rubber material. Micro-deformation of the elastic rubber material helps the main body to seal and cooperate with each wire of the cable.

[0016] In the ninth example of the cable wall sealing assembly, one or more of the first to eighth examples may be optionally included, the cable comprises a plurality of wires and a cable outer sheath surrounding the plurality of wires, and the cable is not provided with the cable outer sheath at the section where the plurality of wires pass through the main body, so that the wires of the cable are easily matched with the wire holes of the main body.

[0017] The cable wall penetration sealing assembly of the present invention, during the manufacturing stage of the fuel measuring cable, seals and wraps the wires at the wall penetration position in advance according to the wall penetration position of the fuel measuring cable in the fuel tank, thereby eliminating gaps between the wires; avoiding destructive disassembly and glue filling operations on the cable during installation; simplifying the sealing work when the fuel measuring cable passes through aircraft beams, ribs and other structures during on-board installation, thereby improving the installation efficiency and sealing effect of the fuel measuring cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to describe the implementation of the above and other features of the present invention, a more particular description of the invention briefly described above will be presented with reference to the exemplary embodiments of the invention shown in the accompanying drawings. It will be understood that these drawings only depict exemplary embodiments of the invention and should not be considered as limiting the scope thereof. The invention will be described and explained through the use of the accompanying drawings and with additional features and details. In the drawings:

[0019] Figure 1 is a schematic side view of a cable wall sealing assembly in the prior art in an installed state;

[0020] Figure 2 is a stereoscopic diagram of a cable wall sealing assembly according to an embodiment of the present invention;

[0021] Figure 3 is a side cross-sectional view of a cable wall penetration sealing assembly according to an embodiment of the present invention;

[0022] Figure 4is a stereoscopic view of a main body of a cable wall sealing assembly according to an embodiment of the present invention; and

[0023] Figure 5 yes Figure 4 A stereoscopic view of the main body of a cable wall sealing assembly, wherein the wires of the cables pass through the wire holes of the main body accordingly.

[0024] The drawings are roughly drawn to scale, however, the dimensions in the drawings are only schematic and not necessarily drawn strictly to scale, but are intended to provide a clearer description. In other embodiments, other relative dimensions may be used.

[0025] Here and throughout the following, identical features appearing in different figures are denoted by identical or similar reference numerals.

[0026] List of reference numerals:

[0027] 100 Cable wall seal assembly

[0028] 110 Main body

[0029] 111 Wire hole

[0030] 112 Snap ring groove

[0031] 120 Snap ring

[0032] 121 Sealing ring groove

[0033] 122 Snap ring protrusion

[0034] 123 corner

[0035] 200 Cable

[0036] 210 Wire

[0037] 220 Cable outer sheath

[0038] 300 Ribs

[0039] 310 threading hole DETAILED DESCRIPTION

[0040] First of all, the present invention mainly relates to structures related to cable penetration sealing in any mechanical manufacturing field. In particular, the present invention relates to the field of aircraft assembly production, for example, the fuel measurement cable is sealed through the partition rib in the aircraft tank, but is not limited to the penetration sealing at this position.

[0041] As used herein, the term “fixed” is intended to describe a component that is connected to another component and is capable of maintaining a constant relative position to each other so that forces, torques, etc. can be transferred from one component to the other.

[0042] Directional terminology used herein, such as "inner," "inner," "outer," and "external," is used to aid in describing the present invention according to the orientation of the embodiments shown in the drawing figures.

[0043] As used herein, the terms "comprising," "having," "including," and variations thereof are intended to serve as open-ended transitional phrases, terms or words requiring the presence of specified elements / steps and also allowing for the presence of other elements / steps.

[0044] In the present invention, unless explicitly stated to the contrary, the terms "first", "second", etc. are not intended to indicate any difference in order, position, quantity or importance, but are merely used as labels to distinguish different positions and components, to distinguish one element, component, region and / or position from another element, component, region and / or position.

[0045] The cable wall sealing assembly 100 of the present invention is used to allow the cable 200 to pass through the rib plate 300 in a sealed manner. The cable 200 of the present invention includes a plurality of wires 210 and a cable outer sheath 220 sleeved on the outer periphery of the wires 210. The rib plate 300 of the present invention is pre-equipped with a threading hole 310 for arranging the cable wall sealing assembly 100 to allow the cable 200 to pass through the wall in a sealed manner.

[0046] In a non-limiting example, the cable wall sealing assembly 100 of the present invention includes a main body 110, which is arranged to partially pass through the wire hole 310 of the rib plate 300 in a first direction in which the cable 200 extends, for example but not limited to a direction perpendicular to the rib plate 300, so that the length of the main body 110 is limited to be greater than the thickness of the rib plate 300.

[0047] The main body 110 has a plurality of wire holes 111 corresponding to the plurality of wires 210 of the cable 200 in the first direction, that is, the middle portion of the main body 110 is prefabricated with the same number of wire holes 111 as the wires 210 of the cable 200 for the wires 210 to pass through the main body 110 .

[0048] Preferably, the main body 110 is made of an elastic rubber material, and through the interference fit between the wires 210 and the wire holes 111 , the micro-deformation of the elastic rubber material facilitates the sealing fit between the main body 110 and each wire 210 of the cable 200 .

[0049] During the manufacture of the cable 200, the conductor 210 is pre-threaded through the main body 110, that is, a wall-penetrating sealing structure is pre-added during the cable manufacturing stage, which can simplify the sealing work when the fuel measuring cable passes through aircraft beams, ribs and other structures during on-site installation.

[0050] Preferably, the cable 200 includes a plurality of wires 210 and a cable outer sheath 220 surrounding the plurality of wires 210 , and the cable 200 is not provided with the cable outer sheath 220 at a section where the plurality of wires 210 pass through the main body 110 .

[0051] In a non-limiting example, the cable wall sealing assembly 100 of the present invention further includes a clamping ring 120. The clamping ring 120 can limit the radial movement of the cable wall sealing assembly 100, so as to achieve good fit and sealing cooperation between the clamping ring 120 and the rib plate 300.

[0052] The snap ring 120 has a substantially annular shape, and the inner circumference of the snap ring 120 sealingly surrounds and abuts against the outer circumference of the main body 110. Preferably, the snap ring 120 is interference-fitted with the main body 110 to seal against the main body 110. The side of the snap ring 120 seals against the rib plate 300 and is fixed to the rib plate 300. Preferably, the snap ring 120 is fixed to the rib plate 300 by a fastening assembly.

[0053] The outer contour size of the main body 110 is optionally smaller than the inner contour size of the threading hole 310, allowing the main body 110 to be easily installed on the rib plate 300. After the main body 110 is installed on the rib plate 300, there is a gap between the main body 110 and the threading hole 310. The clamping ring 120 thus blocks the gap between the main body 110 and the rib plate 300.

[0054] Figure 2 A three-dimensional view of a cable wall sealing assembly 100 according to an embodiment of the present invention is schematically shown.

[0055] The clamp ring 120 can be composed of two semi-circular clamp ring components or more clamp ring components. The multiple clamp ring components of the clamp ring 120 can be spliced ​​into a complete clamp ring 120 on the outer periphery of the main body 110 after the cable 200 passes through the rib plate 300.

[0056] The snap ring components of the snap ring 120 may include a positioning portion on the splicing interface, and the positioning portion may include, for example, at least one positioning recessed portion, such as a groove or a blind hole, and at least one corresponding positioning protruding portion, such as a key or a pin. The snap ring components of the snap ring 120 are kept in relative positions to each other through the corresponding positioning portions, so as to keep being spliced ​​into a complete snap ring 120.

[0057] Figure 3 A side cross-sectional view of a cable wall penetration sealing assembly according to an embodiment of the present invention is schematically shown.

[0058] The cable wall sealing assembly 100 may include two clamping rings 120, which are respectively fixed on both sides of the rib plate 300. Fasteners may be used for fixing, and specifically, the fasteners may include bolts, washers, and nuts. The bolts penetrate the two clamping rings 120 and the rib plate 300 therebetween, and the rib plate 300 is clamped between the two clamping rings 120.

[0059] In a preferred embodiment, the clamping ring 120 may include an annular sealing ring groove 121 on the side facing the rib plate 300 , and a sealing ring is arranged in the sealing ring groove 121 , and further sealing performance is obtained by squeezing the sealing ring.

[0060] In a preferred embodiment, the main body 110 is cylindrical, and an extending direction of the wire hole 111 of the main body 110 is parallel to a first extending direction of the cable 200 .

[0061] Figure 4 A schematic perspective view of the main body 110 of the cable wall sealing assembly 1 is shown, and Figure 5 It is schematically shown that the corresponding wires 210 of the cable 200 pass through the corresponding wire holes 111 of the main body 110 .

[0062] The outer circumference of the main body 110 may be provided with an annular snap ring groove 112, and the inner circumference of the snap ring 120 may be provided with an annular snap ring protrusion 122, which is designed to sealably cooperate with the snap ring groove 112. The axial movement of the cable wall sealing assembly 100 can be further limited.

[0063] exist Figure 3 In the embodiment, the spacing between the two snap ring grooves 112 on the outer peripheral surface of the main body 110 is equal to the thickness of the rib plate 300, and the side wall of the snap ring protrusion 122 of the snap ring 120 is set to be flush with the side wall of the snap ring 120 against the rib plate 300, so the gap between the main body 110 and the rib plate 300 is clamped between the snap rings 120 on both sides of the rib plate 300. The axial movement of the cable wall sealing assembly 100 can be further limited, and it is helpful to achieve a good fit and sealing cooperation between the snap ring 120 and the rib plate 300.

[0064] Preferably, a sealant is filled at the corner 123 between the annular outer wall of the clamping ring 120 and the rib plate 300 to seal the corner.

[0065] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention are clearly and completely described above in conjunction with the specific embodiments of the present invention and the accompanying drawings.

[0066] Although various embodiments have been described above, it should be understood that the embodiments described are part of the embodiments of the present invention, rather than all embodiments, and they are presented in an exemplary rather than limiting manner. It is obvious to those skilled in the relevant art that the disclosed subject matter can be implemented in other specific forms without departing from its spirit and essential features.

[0067] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention. The present disclosure also includes various modifications and modifications within the equivalent scope. In addition, various combinations and methods, further including only one element, more than one or less than one other combinations and methods also belong to the scope and scope of thought of the present disclosure.

Claims

1. A cable wall sealing assembly, used to allow a cable (200) to pass through a rib plate (300) in a sealed manner, characterized in that: The cable wall sealing assembly (100) comprises: a main body (110), the main body (110) partially passing through the wire threading hole (310) of the rib plate (300) in a first direction in which the cable (200) extends, the main body (110) having a plurality of wire holes (111) corresponding to a plurality of wires (210) of the cable (200) in the first direction, and A clamping ring (120), the inner circumference of which surrounds and abuts against the outer circumference of the main body (110), and the side surface of which abuts against the rib plate (300) and is fixed to the rib plate (300).

2. The cable wall sealing assembly according to claim 1, characterized in that: The clamping ring (120) is composed of two or more clamping ring sub-components spliced ​​together, and the clamping ring sub-components include a positioning portion on the splicing interface, and the positioning portion includes at least one positioning recessed portion and at least one corresponding positioning protruding portion.

3. The cable wall sealing assembly according to claim 1, characterized in that: The clamping ring (120) comprises an annular sealing ring groove (121) on the side facing the rib plate (300), and a sealing ring is arranged in the sealing ring groove (121).

4. The cable wall sealing assembly according to claim 1, characterized in that: The main body (110) is cylindrical, and an annular snap ring groove (112) is provided on the outer peripheral surface of the main body (110); and An annular snap ring protrusion (122) is provided on the inner circumferential surface of the snap ring (120), and the snap ring protrusion (122) is sealingly matched with the snap ring groove (112).

5. The cable wall sealing assembly according to claim 4, characterized in that: The number of the clamping rings (120) is two, which are respectively arranged on both sides of the rib plate (300); and There are two snap ring grooves (112) for cooperating with the corresponding snap ring (120), and the spacing between the two snap ring grooves (112) is equal to the thickness of the rib plate (300).

6. The cable wall sealing assembly according to claim 4, characterized in that: The side wall of the snap ring protrusion (122) of the snap ring (120) is flush with the side wall of the snap ring (120) abutting against the rib plate (300).

7. The cable wall sealing assembly according to claim 1, characterized in that: Sealant is filled at the corner (123) between the annular outer wall of the clamping ring (120) and the rib plate (300) to seal the corner.

8. The sealing assembly according to claim 1, characterized in that The main body (110) is made of elastic rubber material.

9. The sealing assembly according to claim 1, characterized in that: The cable (200) comprises the plurality of wires (210) and a cable outer sheath (220) surrounding the plurality of wires (210), and the cable (200) is not provided with the cable outer sheath (220) at a section where the plurality of wires (210) pass through the main body (110).

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