Sealing device for cable penetrating through cabin

Abstract

The embodiment of the utility model discloses a sealing device for an out-of-cabin cable, and the device comprises a cup-shaped pipe joint which is used for the cable to pass through; the cabin inner side sealing assembly is used for sealing between the cup-shaped pipe joint and a cable located in the cabin; the cabin outer side sealing assembly is used for sealing between the cup-shaped pipe joint and a cable located outside the cabin; the sealant assembly is located between the cabin inner side sealing assembly and the cabin outer side sealing assembly and used for sealing the cabin inner side sealing assembly and the cabin outer side sealing assembly to the two ends of the cup-shaped pipe joint; and the dynamic self-sealing assembly is positioned at the tail part of the cabin outer side sealing assembly. The sealing device for the cable penetrating through the cabin has the characteristic of dynamic pressure sealing, so that the functions of watertightness, good sealing performance and long service life are realized.

Description

Technical Field

[0001] The utility model relates to a sealing device, in particular to a sealing device for cables passing outside a cabin. Background Art

[0002] At present, in the design of electrical systems of general outboard equipment, there are about 100 outboard cables from inside to outside the cabin, with about 20-70 specifications and models, and about 20-50 specifications and models of cables provided by equipment manufacturers. Due to the wide variety of cables, the design of sealing devices and sealing processes are very critical.

[0003] When sealing the cables outside the cabin, it is necessary to perform relevant procedures such as process verification and construction process capability confirmation before construction. The sealing work of the cables outside the cabin is directly related to the safety of the equipment outside the cabin. It is a common phenomenon that the sealing failure of the equipment outside the cabin occurs during use, which is also a problem that has attracted great attention in the field of sealing technology for cables outside the cabin.

[0004] At present, due to the inadequate design of details, the sealing devices for the cables outside the cabin are often leaking, seeping, dripping, and cable movement when used at a maximum underwater depth of 400 meters, which poses a huge safety hazard to the equipment that needs to be sealed. In order to ensure that the equipment can be used normally at a deeper depth of 600 meters underwater, the sealing devices and sealing methods for the cables outside the cabin need to be redesigned to meet customer requirements.

[0005] At present, the sealing form of the cable through the ship used in underwater projects is mainly the cable through-piece packing seal. In order to solve the above problems, for example, the patent with the publication number CN219420219U discloses a cable sealing assembly for passing through the string. First, a cup-shaped conduit is fixedly mounted on the cable, and then a cabin inner side sealing assembly is fixedly arranged on one side of the cup-shaped conduit, and a cabin outer side sealing assembly is fixedly arranged on the other side. The cabin inner side sealing assembly includes a cabin inner side clamping nut and a cabin inner side sealing rubber sleeve; the cabin inner side sealing rubber sleeve is fixedly arranged between the outer wall of the cable and the inner wall of the cup-shaped conduit; the cabin outer side sealing assembly includes a carbon fiber packing sealing assembly and a cabin outer side clamping nut; the carbon fiber packing sealing assembly is fixedly arranged between the outer wall of the cable and the inner wall of the cup-shaped conduit; the cabin inner side clamping nut and the cabin outer side clamping nut are fixedly connected to the two ports of the cup-shaped conduit respectively. Among them, the carbon fiber packing sealing assembly includes a carbon fiber packing and a cable sealing rubber layer; the carbon fiber packing is located on the cable sealing rubber layer.

[0006] In the above design, since the cable is an inelastic body, it will be locally deformed after the compression nut on the inner side of the cabin presses on the sealing rubber sleeve on the inner side of the cabin. At the same time, although the fit between the cable and the cable sealing rubber layer located on the outer side of the cabin is good, it realizes static sealing. Because when the external water pressure and / or temperature change dynamically, the cable cannot accurately rebound and expand synchronously. Therefore, the glue between the cable and the cable sealing rubber layer will come off and cracks will occur. Under the action of water pressure, leakage will occur at the cracks. Summary of the Utility Model

[0007] The technical problem to be solved by the present utility model is to provide a sealing device for a cable passing through the cabin, which has the characteristics of dynamic pressure sealing, so as to achieve the functions of no leakage, good sealing performance and long service life.

[0008] To solve the above technical problems, an embodiment of the present utility model provides a sealing device for a cable passing through the cabin, including: a cup-shaped pipe joint for the cable to pass through; an inner cabin sealing assembly for sealing between the cup-shaped pipe joint and the cable located inside the cabin; an outer cabin sealing assembly for sealing between the cup-shaped pipe joint and the cable located outside the cabin; and a dynamic self-sealing assembly located at the tail of the outer cabin sealing assembly; a sealing glue is applied between the inner cabin sealing assembly and the outer cabin sealing assembly for sealing the inner cabin sealing assembly and the outer cabin sealing assembly at both ends of the cup-shaped pipe joint.

[0009] For the improvement of the above technical solution, the dynamic self-sealing assembly includes: a tapered hole compression nut for sealing between the cup-shaped pipe joint and the cable located outside the cabin; and a tapered sealing rubber ring located in the tapered hole of the tapered hole compression nut for adapting to seal with the tapered hole compression nut.

[0010] For the further improvement of the above technical solution, a sealing rubber layer is applied between the tapered hole compression nut and the cable.

[0011] For the further improvement of the above technical solution, the sealing rubber layer is a polyurethane modified sealing rubber layer.

[0012] For the further improvement of the above technical solution, the inner cabin sealing assembly includes an inner convex curved surface compression washer, an inner sealing rubber ring, an inner compression washer and an inner compression nut arranged in sequence from the inside to the outside.

[0013] For the further improvement of the above technical solution, an inner sealing rubber ring and an inner curved surface compression washer are arranged in sequence between the inner compression washer and the inner compression nut.

[0014] For further improvement of the above technical solution, the outer cabin sealing assembly includes: an outer convex curved surface pressing gasket, a carbon fiber packing assembly, and an outer curved surface pressing gasket, which are arranged in sequence from inside to outside; the outer curved surface pressing gasket is adapted to be sealed with the dynamic self-sealing assembly.

[0015] For further improvement of the above technical solution, the carbon fiber packing assembly includes at least two superimposed carbon fiber packings; the cross-section of the carbon fiber packing is a square strip.

[0016] For further improvement of the above technical solution, the height of the inner sealing rubber ring is 3 / 4 of the depth of the groove where it is located, and it is provided with an opening in the shape of an inclined plane.

[0017] For further improvement of the above technical solution, the conical sealing rubber ring is provided with an opening in the shape of an inclined plane.

[0018] Implementing the embodiments of the present invention has the following beneficial effects:

[0019] The sealing device for the through-cabin cable of the present invention further seals the outer cabin sealing assembly by using a dynamic self-sealing assembly. During actual use, the contact surface with water is increased, and dynamic self-sealing is achieved, that is, when the external water pressure and / or temperature change dynamically, the dynamic self-sealing assembly is extruded by the water pressure, causing it to undergo elastic deformation, so that the cable also accurately rebounds or expands synchronously, thereby completing the self-sealing of the cable, achieving the functions of being watertight and having a long service life.

[0020] In order to enable the dynamic self-sealing assembly to complete dynamic sealing, it is achieved by designing a conical hole pressing nut and a conical sealing rubber ring that are expected to be adaptively sealed, and increasing the radial component force.

[0021] A sealing glue layer is applied between the conical hole pressing nut and the cable, further improving its sealing performance. Among them, the sealing glue layer is a polyurethane-modified sealing glue layer.

[0022] At the same time, a matching notch thread is provided between the inner pressing nut and the inner cabin sealing assembly, causing the inner cabin sealing assembly to be extruded to form lateral expansion and having a certain amount of deformation, thereby tightly holding and fastening the cable in the cup-shaped pipe joint. An inner curved surface pressing gasket and an inner sealing rubber ring are sequentially arranged between the inner sealing rubber ring and the inner curved surface pressing gasket, further improving the sealing effect.

[0023] Among them, the extrusion of the conical hole compression nut on the carbon fiber packing assembly forms the seal of the water-contact end of the through-hull cable; the cross-section of the carbon fiber packing is designed as a square strip, making it easier to seal; the height of the inner sealing rubber ring is 3 / 4 of the depth of the groove where it is located, so that when the inner compression nut is screwed in 1 to 2 threads, it is pre-compressed. At the same time, both the conical sealing rubber ring and the inner sealing rubber ring are provided with bevel-shaped openings, which are convenient for prying open and installing the sealing material because the cable has been pre-installed.

[0024] In summary, the present invention adopts a multiple sealing combination of a double-end dissimilar sealing component to seal the cup-shaped pipe joint, that is, the multiple sealing structures outside the cabin, inside the cabin and between cabins are backed up and redundant with each other to solve the problem of the seal of the through-hull cable in case of emergency. The sealing ability of the through-hull cable is improved and greatly enhanced. Description of the Drawings

[0025] The drawings described herein are used to provide a further understanding of the present utility model, form a part of this application, and do not constitute an improper limitation to the present utility model. In the drawings:

[0026] Figure 1 A cross-sectional schematic diagram provided for a sealing device of a through-hull cable according to an embodiment of the present utility model;

[0027] Figure 2 A three-dimensional structural schematic diagram provided for the conical hole compression nut in a sealing device of a through-hull cable according to an embodiment of the present utility model;

[0028] Figure 3 For Figure 2 of the cross-sectional schematic diagram;

[0029] Figure 4 A three-dimensional structural schematic diagram provided for the conical sealing rubber ring in a sealing device of a through-hull cable according to an embodiment of the present utility model;

[0030] Figure 5 A three-dimensional structural schematic diagram provided for the inner convex curved surface compression washer in a sealing device of a through-hull cable according to an embodiment of the present utility model;

[0031] Figure 6 A three-dimensional structural schematic diagram provided for the inner curved surface compression washer in a sealing device of a through-hull cable according to an embodiment of the present utility model

[0032] Figure 7 A three-dimensional structural schematic diagram provided for the inner sealing washer in a sealing device of a through-hull cable according to an embodiment of the present utility model;

[0033] Figure 8A three-dimensional structural schematic diagram provided for the inner sealing rubber ring in a sealing device for an out-of-hull cable according to an embodiment of the present utility model. Detailed implementation manners

[0034] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Here, the illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not limit the present utility model.

[0035] Embodiment:

[0036] As Figures 1-8 shown, the sealing device for an out-of-hull cable according to the present utility model includes a cup-shaped pipe joint 1, an inner cabin sealing assembly 2, an outer cabin sealing assembly 3, and a dynamic self-sealing assembly 5. The inner cabin sealing assembly 2 is used for sealing between the cup-shaped pipe joint 1 and the cable 6 located inside the cabin; the outer cabin sealing assembly 3 is used for sealing between the cup-shaped pipe joint 1 and the cable 6 located outside the cabin; the dynamic self-sealing assembly 5 is located at the tail of the outer cabin sealing assembly 3. A sealing glue 4 is applied between the inner cabin sealing assembly 2 and the outer cabin sealing assembly 3 for sealing the inner cabin sealing assembly 2 and the outer cabin sealing assembly 3 at both ends of the cup-shaped pipe joint.

[0037] Among them, the cup-shaped pipe joint 1 is used for the cable 6 to pass through, and it is hermetically fixed on the hull 7 of the pressure-resistant body, usually by welding and fixing. During actual use, the outer diameter of the cable 6 is usually 10 - 46 mm. The inside of the cup-shaped pipe joint 1 is a symmetrically hollow structure with a ring-shaped protrusion. The sealing glue assembly 4 is located between the ring-shaped protrusion and the passing cable 6, aiming to seal the cup-shaped pipe joint 1 and the cable 6. At the same time, the cup-shaped pipe joint 1 is also partitioned into two parts, the inside of the cabin and the outside of the cabin. Meanwhile, at the end slot openings of the cup-shaped pipe joint 1 in the two parts of the inside of the cabin and the outside of the cabin, there are respectively slot threads for pressing (not shown in the figure).

[0038] The dynamic self-sealing assembly 5 includes a tapered hole compression nut 51 and a tapered sealing rubber ring 52. The tapered hole compression nut 51 is used for sealing between the cup-shaped pipe joint and the cable located outside the cabin; the tapered sealing rubber ring 52 is located in the tapered hole of the tapered hole compression nut 51 for adapting to seal with the tapered hole compression nut 51.

[0039] During actual use, the dynamic self-sealing assembly 5 increases the contact surface with water and realizes dynamic sealing. That is, when the external water pressure and / or temperature change dynamically, the water pressure is used to squeeze the dynamic self-sealing assembly 5, causing it to undergo elastic deformation, so that the cable 6 also accurately rebounds or expands synchronously, thereby completing the self-sealing of the cable 6, achieving the characteristics of no water leakage and long service life.

[0040] To enable the dynamic self-sealing component 5 to achieve dynamic sealing, it is realized by designing a tapered hole compression nut 51 and a tapered sealing rubber ring 52 expected to be adaptively sealed, and increasing the radial component force.

[0041] The height of the tapered sealing rubber ring 52 is the same as that of the tapered hole compression nut 51, aiming to reduce the radial pressure because only the end face is under pressure. The tapered sealing rubber ring 52 is provided with an opening in the shape of an inclined plane (as Figure 8 shown), which is convenient for prying open and installing the sealing material because the cable is pre-passed through.

[0042] A sealing glue layer is applied between the tapered hole compression nut 51 and the cable 6, further improving its sealing performance. Among them, the sealing glue layer is a polyurethane-modified sealing glue layer (not shown in the figure). In the actual use process, the materials used for the polyurethane-modified sealing glue layer include one or more of epoxy-modified, silicone-modified, polyurethane-modified, acrylate-modified, polyurethane-modified, acrylate-modified, and nano-inorganic material-modified materials. Considering the operation time (used up within 1 hour), the initial curing time (12 hours), and the complete curing (48 hours), its hardness, tensile strength, elongation at break, resilience, and adhesion strength meet the national standard requirements.

[0043] The inner side sealing component 2 of the cabin includes an inner convex curved surface compression washer 21, an inner sealing rubber ring 22, an inner compression washer 23, and an inner compression nut 24 arranged in sequence from the inside to the outside;

[0044] The inner compression nut 24 is threadedly adapted and sealed with the notch of the cup-shaped pipe joint 1 located inside the cabin. As Figure 5 and Figure 6 shown, the inner convex curved surface compression washer 21 is different from an ordinary compression washer. It has a protrusion at the end and is also designed as a curved surface, making it clamp the cup-shaped pipe joint 1 and the passed-through cable 6 more firmly, and further improving the sealing performance.

[0045] An inner sealing rubber ring 22 and an inner curved surface compression washer 25 are successively arranged between the inner compression washer 23 and the inner compression nut 24, which is equivalent to adding two seals. This intermittent penetration effect improves the fastening performance, thereby further enhancing the sealing performance. The height of the inner sealing rubber ring 22 is 3 / 4 of the depth of the corresponding groove, aiming to enable the inner compression nut to be screwed in 1 to 2 threads for pre-compression. Because if the height is too high, the inner compression nut cannot be assembled.

[0046] The inner sealing rubber ring 22 is provided with an opening in the shape of an inclined plane (as Figure 8 shown), which is convenient for prying open and installing the sealing material.

[0047] The outer cabin sealing assembly 3 includes, from inside to outside in sequence, an outer convex curved surface compression gasket 31, a carbon fiber packing assembly 32, and an outer curved surface compression gasket 33; the outer curved surface compression gasket 33 is adapted to be sealed with the dynamic self-sealing assembly 5.

[0048] Among them, the carbon fiber packing assembly 32 includes at least two superimposed carbon fiber packings, and the cross-section of the carbon fiber packing is a square strip. Such a design is adopted because a square cross-section is easier to fill the hollow cavity of the cup-shaped pipe joint 1 and is easier to seal than circular and elliptical cross-sections.

[0049] Among them, both the conical sealing rubber ring and the inner sealing rubber ring are carbon nano composite sealing rubber rings. This material is suitable for salt spray, mildew, and damp heat environments, resistant to oil, acids and alkalis, corrosion, high temperature and high pressure, non-toxic, and meets the standards such as GB / T2406 93, GB / T3512 01, GB / T14243 09, etc. The indexes such as tensile strength, elongation at break, Shore hardness, and relative permanent deformation meet the standards such as GB / T1701 01, GB / T531.1 02, GB / T7759 96, etc.

[0050] In order to further improve the sealing performance, a sealing glue layer (not shown) is applied between the outer wall of the outer cabin sealing assembly 3 and the inner wall of the cup-shaped pipe joint 1.

[0051] The outer diameters of the conical sealing rubber ring 52 and the inner sealing rubber ring 22 are both less than or equal to the inner diameter of their respective grooves by 1 mm, and the inner diameters of the conical sealing rubber ring 52 and the inner sealing rubber ring 22 are both greater than or equal to the outer diameter of the cable 1 by 1 mm. This tolerance fit ensures the sealing performance.

[0052] The inner compression gasket 23, the outer convex curved surface compression gasket 31, and the outer curved surface compression gasket 33 all adopt brass materials, which have good corrosion and oxidation resistance and also have the characteristics of high temperature resistance. The thickness is about 3 - 5 mm. At the same time, 2 small holes are drilled on the plane of the compression gasket for easy disassembly and removal. The determination of the inner and outer diameters of the inner compression gasket 23, the outer convex curved surface compression gasket 31, and the outer curved surface compression gasket 33 above: Measure the outer diameter of the cable 6, and determine the inner diameter D1 of the above compression gasket according to the maximum outer diameter D of the measured cable 6, and require D1 - D ≤ 1 mm; the inner diameter of the cup-shaped pipe joint 1 and the outer diameter of the compression gasket 1 should meet 1 ≤ 1 mm, where the smaller the fit tolerance, the more the sealing performance can be ensured.

[0053] The above has introduced in detail the technical solutions provided by the embodiments of the present utility model. Specific examples are used herein to elaborate on the principles and implementation manners of the embodiments of the present utility model. The description of the above embodiments is only applicable to helping understand the principles of the embodiments of the present utility model. At the same time, for those of ordinary skill in the art, according to the embodiments of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation on the present utility model.

Claims

1. A sealing device for a through-hull cable, characterized in that, Comprising: A cup-shaped pipe joint for cables to pass through; An in-cabin side sealing assembly for sealing between the cup-shaped pipe joint and the cable located inside the cabin; An out-of-cabin side sealing assembly for sealing between the cup-shaped pipe joint and the cable located outside the cabin; And a dynamic self-sealing assembly located at the tail of the out-of-cabin side sealing assembly; Sealant is applied between the in-cabin side sealing assembly and the out-of-cabin side sealing assembly for sealing the in-cabin side sealing assembly and the out-of-cabin side sealing assembly to both ends of the cup-shaped pipe joint.

2. The sealing device for a cable passing through a bulkhead according to claim 1, characterized in that: The dynamic self-sealing assembly includes: A tapered hole compression nut for sealing between the cup-shaped pipe joint and the cable located outside the cabin; And a tapered seal ring located in the tapered hole of the tapered hole compression nut for mating and sealing with the tapered hole compression nut.

3. The sealing device for a cable passing through a bulkhead according to claim 2, characterized in that: A sealant layer is applied between the tapered hole compression nut and the cable.

4. The sealing device for a cable passing through a bulkhead according to claim 3, characterized in that: The sealant layer is a polyurethane-modified sealant layer.

5. The sealing device for a cable passing through a bulkhead according to claim 1, characterized in that: The in-cabin side sealing assembly includes: An inner convex curved surface compression washer, an inner seal ring, an inner compression washer, and an inner compression nut arranged in sequence from the inside out.

6. The sealing device for a cable passing through a bulkhead according to claim 5, characterized in that: An inner seal ring and an inner curved surface compression washer are sequentially arranged between the inner compression washer and the inner compression nut.

7. The sealing device for a cable passing through a bulkhead according to claim 1, characterized in that: The out-of-cabin side sealing assembly includes: An outer convex curved surface compression washer, a carbon fiber packing assembly, and an outer curved surface compression washer arranged in sequence from the inside out; The outer curved surface compression washer is adapted to seal with the dynamic self-sealing assembly.

8. The sealing device for a cable passing through a bulkhead according to claim 7, characterized in that: The carbon fiber packing assembly includes at least two superimposed carbon fiber packings; The cross-section of the carbon fiber packing is a square strip.

9. The sealing device for a cable passing through a bulkhead according to claim 5, characterized in that: The height of the inner seal ring is 3 / 4 of the depth of the groove where it is located, and it is provided with an opening in the shape of an inclined plane.

10. The sealing device for a cable passing through a bulkhead according to claim 2, characterized in that: The tapered seal ring is provided with an opening in the shape of an inclined plane.

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