Multi-core fiber cable penetration seal

Abstract

The utility model discloses a kind of multicore optical fiber cabin-penetrating sealing structures, it includes sealed cabin and separates fiber tray, partition block is provided in sealed cabin, partition block is divided into the cavity of passing out and sealed cavity, it is used for filling sealant in sealed cavity, through hole is set in the middle of partition block, the cavity of passing out and sealed cavity are communicated by through hole;Separate fiber tray is placed in sealed cavity, and separate fiber tray is provided with fiber penetrating plate, and a plurality of fiber penetrating holes are set in interval on fiber penetrating plate, and fiber penetrating hole is used for the most two optical fibers to be set through passing through.This utility model places separate fiber tray in sealed cavity, after optical fiber bundle passes through through hole, the most two optical fibers are passed out from single fiber penetrating hole of fiber penetrating plate, the sealant in sealed cavity can be filled into the gap between optical fiber and fiber penetrating plate and the gap between two optical fibers, complete the sealing effect of sealed cavity, effectively solve the problem that at least three optical fibers pass through from the same hole in traditional cabin-penetrating mode, and there is gap between optical fiber, so that product has problem.

Description

Technical Field

[0001] In the field of fiber optic sensing technology, and more specifically, this invention relates to a multi-core fiber optic through-cabin sealing structure. Background Technology

[0002] When the optical cable passes through the fiber optic sensor array, the junctions between the insertion and exit ends and the array need to be sealed to ensure that the internal filler, such as filler oil, does not leak out. Currently, the insertion and exit ends in the array are sealed through a straight fiber optic nozzle. This mainly involves concentrating all the optical fibers inside the cable through the nozzle and using Loctite adhesive to fill the inside of the nozzle. After the Loctite adhesive has completely cured, the optical fiber and the nozzle form a whole, thereby achieving the sealing effect of passing through the chamber.

[0003] When three or more optical fibers are bonded together, a small gap will appear at the fiber junction. When applying adhesive to the fiber nozzle, it cannot be guaranteed that this gap will be filled with each application. The unfilled structure loses its sealing function, resulting in inconsistent array outer diameters. Incomplete array outer diameters can lead to various uncontrollable situations during transportation and detection. The most serious issue is that during detection, the dragging of the array by unfilled hydrophones will generate a large amount of flow noise, directly interfering with the signal detection of the hydrophones in the array.

[0004] Therefore, it is urgent to propose a multi-core optical fiber through-cabin sealing structure to solve the problem. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] Based on this, the present invention provides a multi-core optical fiber through-cabin sealing structure, which effectively solves the problem of product problems caused by gaps between optical fibers when at least three optical fibers pass through the same hole in the traditional through-cabin method.

[0007] (II) Technical Solution

[0008] To solve the above technical problems, this utility model proposes a multi-core optical fiber through-cabin sealing structure, which includes a sealing cabin and a fiber distribution plate. A partition is provided in the sealing cabin, which divides the sealing cabin into an exit cavity and a sealing cavity. The sealing cavity is filled with sealant. A perforation is provided in the middle of the partition, and the exit cavity and the sealing cavity are connected through the perforation.

[0009] The fiber distribution tray is placed inside the sealed cavity. The fiber distribution tray is provided with a fiber threading plate. The fiber threading plate is provided with a plurality of fiber threading holes spaced apart. The fiber threading holes are designed to allow up to two optical fibers to pass through.

[0010] Furthermore, it also includes a fiber optic spool, with both the fiber optic splitter and the fiber optic spool placed inside the sealed cavity. The fiber optic splitter is placed inside the sealed cavity at one end near the perforation, and the fiber optic spool is placed at one end of the sealed cavity near the opening. A fiber optic spool is provided in the middle of the fiber optic spool, and the optical fibers coming out of the perforation will pass through the fiber optic spool together to form an optical fiber bundle.

[0011] Furthermore, a third annular protrusion is provided inside the synthetic fiber disc.

[0012] Furthermore, the synthetic fiber disc has a cylindrical structure.

[0013] Furthermore, the fiber distribution disc also includes a limiting plate extending from the periphery of the fiber threading plate, with the fiber distribution disc positioned at one end of the limiting plate.

[0014] Furthermore, the sealed chamber has a first annular protrusion inside the sealed cavity, and the fiber-threaded plate is placed on the first annular protrusion. The cross-sectional diameter of the fiber-threaded plate is larger than the inner diameter of the first annular protrusion.

[0015] Furthermore, the sealed chamber is provided with a second annular protrusion within the through-cavity.

[0016] Furthermore, the two sides of the partition block have a conical structure.

[0017] Furthermore, the depth of the sealed cavity is greater than the depth of the protruding cavity.

[0018] Furthermore, both the sealed chamber and the fiber distribution disc are cylindrical in shape.

[0019] (III) Beneficial Effects

[0020] Compared with existing technologies, this utility model provides a multi-core optical fiber penetration sealing structure, comprising a sealing chamber and a fiber distribution tray. A partition is provided within the sealing chamber, dividing it into an exit cavity and a sealing cavity. The sealing cavity is filled with sealant. A perforation is formed in the center of the partition, connecting the exit cavity and the sealing cavity. The fiber distribution tray is placed within the sealing cavity and is equipped with a fiber-guiding plate. Multiple fiber-guiding holes are spaced apart on the fiber-guiding plate, allowing up to two optical fibers to pass through. By setting up the sealing chamber and fiber distribution tray, and placing the fiber distribution tray within the sealing cavity of the sealing chamber, after the optical fiber bundle passes through the perforation, up to two optical fibers exit from a single fiber-guiding hole on the fiber-guiding plate. The sealant within the sealing cavity fills the gap between the optical fiber and the fiber-guiding plate, as well as the slit between the two optical fibers, achieving a sealing effect on the sealing cavity. This effectively solves the problem of gaps between optical fibers when at least three optical fibers pass through the same hole in traditional penetration methods, causing product issues. Attached Figure Description

[0021] The features and advantages of this utility model will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as limiting the utility model in any way. In the drawings:

[0022] Figure 1 This is a schematic diagram of a multi-core optical fiber through-cabin sealing structure according to the present invention;

[0023] Figure 2 This is a cross-sectional view of a multi-core optical fiber through-cabin sealing structure according to this utility model;

[0024] Figure 3 This is a structural cross-sectional view of the sealed chamber of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the fiber-threaded plate of this utility model;

[0026] Figure 5 This is a cross-sectional view of the structure of the synthetic fiber disc of this utility model. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components; and they can also refer to a "transmission connection," that is, a power connection through various suitable methods such as belt drive, gear drive, or sprocket drive. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] like Figures 1 to 5As shown, this utility model embodiment discloses a multi-core optical fiber through-cabin sealing structure for allowing an optical fiber bundle to pass through. The optical fiber bundle includes at least three optical fibers. The multi-core optical fiber through-cabin sealing structure of this utility model includes a sealing chamber 10 and a fiber distribution plate 20. A partition 11 is provided inside the sealing chamber 10, which divides the sealing chamber 10 into an exit cavity 12 and a sealing cavity 13. The sealing cavity 13 is used to fill with sealant (not shown in the figure). The optical fiber bundle enters from the sealing cavity 13 and exits from the exit cavity 12.

[0030] A perforation 14 is provided in the middle of the partition 11, through which the through-hole 12 and the sealing cavity 13 are connected. This allows the optical fiber bundle to pass through the through-hole 14 from the sealing cavity 13 into the through-hole 12. After the optical fiber bundle extends out of the through-hole 12, it is convenient to connect with external device structures. In addition, due to the connecting effect of the perforation 14, when the sealant is injected into the sealing cavity 13, the injected sealant is less likely to generate air bubbles in the sealing cavity 13.

[0031] The fiber distribution tray 20 is placed inside the sealed cavity 13. The fiber distribution tray 20 is provided with a fiber threading plate 21. The fiber threading plate 21 has multiple fiber threading holes 211 spaced apart. The fiber threading holes 211 are designed to allow up to two optical fibers to pass through. After the optical fibers pass through the fiber threading plate 21, the sealant in the sealed cavity 13 will fill the gap between the optical fiber and the fiber threading plate 21 and the gap between the two optical fibers, effectively ensuring the sealing performance of the sealing structure of this utility model and avoiding the problem of oil leakage in the sealed cavity 10 caused by gaps between three or more optical fibers in the traditional fiber threading method. In this embodiment, the sealant is preferably Loctite. The number of fiber threading holes 211 can be related to the number of optical fibers in the fiber bundle to be threaded, or the maximum number of fiber threading holes 211 can be pre-drilled directly on the fiber threading plate 21 to meet the needs of fiber bundles with different numbers of optical fibers.

[0032] In one embodiment, the multi-core optical fiber through-cabin sealing structure of the present invention further includes a fiber fusion tray 30. Both the fiber splitter tray 20 and the fiber fusion tray 30 are placed inside the sealing cavity 13. The fiber splitter tray 20 is placed inside the sealing cavity 13 near the end of the through-hole 14, and the fiber fusion tray 30 is placed at the end of the sealing cavity 13 near the opening. A fiber fusion hole 31 is opened in the middle of the fiber fusion tray 30. The optical fibers coming out of the through-hole 211 will pass through the fiber fusion hole 31 together and be re-synthesized into an optical fiber bundle to avoid the optical fiber touching the wall, which would cause the optical fiber side to be unprotected and affect the sealing effect of the product.

[0033] In one embodiment, the sealing chamber 10 has a first annular protrusion 15 inside the sealing cavity 13, and the fiber optic plate 21 is placed on the first annular protrusion 15. The cross-sectional diameter of the fiber optic plate 21 is larger than the inner diameter of the first annular protrusion 15, so that the fiber optic plate 21 can be stably fitted to the first annular protrusion 15. The first annular protrusion 15 is a preset distance from the perforation 14, so that the optical fiber bundle can be better dispersed in the fiber optic hole 211 of the fiber optic plate 21 after passing through the perforation 14, so as to better complete the sealing operation of the product.

[0034] In one embodiment, the fiber distribution tray 20 further includes a limiting plate 22 extending from the periphery of the fiber threading plate 21. The fiber combining tray 30 is placed at one end of the limiting plate 22. The limiting plate 22 supports the fiber combining tray 30, so that the fiber combining hole 31 is a preset distance from the fiber threading hole 211. This facilitates the multiple optical fibers passing through the fiber threading hole 211 to be better recombined into an optical fiber bundle in the fiber combining hole 31, so as to avoid the optical fiber touching the wall and causing the optical fiber side to be unprotected, thus affecting the sealing effect of the product.

[0035] In one embodiment, the sealed chamber 10 is provided with a second annular protrusion 16 inside the exit cavity 12, so that the exit cavity 12 has a stepped structure, so as to minimize the interference of external structures on the optical fiber when the optical fiber passes through the exit cavity 12.

[0036] In one embodiment, a third annular protrusion 32 is provided inside the fiber optic disc 30, so that the internal structure of the fiber optic disc 30 is stepped, so that the sealant in the sealing cavity 13 can be located inside the fiber optic disc 30 as much as possible, thereby ensuring the sealing performance of the sealant inside the fiber optic disc 30.

[0037] In one embodiment, the spacer 11 has a conical structure on both sides to facilitate the injection of sealant into the sealing cavity 13, so that the injected sealant is less likely to generate air bubbles in the sealing cavity 13.

[0038] In one embodiment, the depth of the sealed cavity 13 is greater than the depth of the protruding cavity 12, so as to better accommodate the fiber distribution disc 20 and the fiber synthesis disc 30.

[0039] In one embodiment, the sealing chamber 10, the fiber distribution disc 20, and the fiber synthesis disc 30 are all cylindrical in shape, which allows the fiber distribution disc 20 and the fiber synthesis disc 30 to fit better against the inner wall of the sealing cavity 13 when placed in the sealing chamber 10, thus better ensuring the sealing effect of the product.

[0040] This utility model is assembled from the sealing chamber 10, fiber distribution disk 20, and fiber combining disk 30 of the above-mentioned multi-core optical fiber through-chamber sealing structure. The specific process is as follows:

[0041] After the fiber bundle is passed through the perforation 14 of the sealed chamber 10, sealant is injected into the bottom end of the sealed cavity 13 to perform the initial sealing operation on the sealed cavity 13.

[0042] After the adhesive at the bottom of the sealed cavity dries, sealant is applied to the remaining space inside the sealed cavity 13 using a dotting method. At this time, due to the presence of tiny air bubbles in the gaps within the fiber bundle, air bubbles may be present in the sealed cavity 13. If the air bubbles are too large, a pressure difference may occur under pressure, which could lead to fiber breakage. In this case, the next assembly step is required.

[0043] Multiple optical fibers extending from the opening of the sealed cavity 13 are passed through the fiber holes 211 of the fiber optic plate 21, ensuring that the number of optical fibers passing through each fiber hole 211 does not exceed 2. If the number of optical fibers in the fiber hole 211 exceeds 2, there will inevitably be gaps between the optical fibers. The sealant may not be able to fill the gaps, which may lead to the formation of air bubbles or cavities.

[0044] The fiber distributor 20, through which optical fibers are threaded, is placed inside the sealed cavity 13 of the sealed chamber 10. At this time, the fiber distributor 20 will squeeze the sealant inside the sealed cavity 13. The sealant inside the sealed cavity 13 will enter the interior of the fiber distributor 20 through the fiber insertion hole 211 of the fiber distributor 20 where no optical fiber is threaded, and the excess sealant will overflow from the opening of the sealed cavity 13. The overflowing sealant can be slowly removed from the surface of the sealed chamber 10 using a toothpick or other scraping tool. At this time, the sealant inside the sealed cavity 13, through the squeezing of the fiber distributor 20, gradually penetrates into the fiber insertion hole 211 and gradually penetrates into the gap between the two optical fibers passing through the fiber insertion hole 211, effectively ensuring the sealing performance of the sealing structure of this utility model and avoiding the problem of oil leakage in the sealed chamber 10 caused by gaps between three or more optical fibers in the traditional insertion method.

[0045] After completing the sealing operation of the fiber bundles in the sealed chamber 10, it is necessary to combine the scattered light into fiber bundles. At this time, it is necessary to pass the multiple optical fibers that have passed through the fiber board 21 through the fiber combining hole 31 of the fiber combining plate 30 and reassemble them into fiber bundles.

[0046] The fiber optic cable 30, through which the fiber bundle is threaded, is placed inside the sealed cavity 13 of the sealed chamber 10. At this time, the fiber optic cable 30 will squeeze the sealant inside the sealed cavity 13. The sealant inside the sealed cavity 13 will enter the interior of the fiber optic cable 30 through the fiber optic hole 31 after being squeezed by the fiber optic cable 30. The excess sealant will overflow from the opening of the sealed cavity 13. The overflowing sealant is then slowly removed from the surface of the sealed chamber 10 using a toothpick or other scraping tool. At this time, the fiber optic cable 30 inside the sealed cavity 13 is placed above the fiber splitter 20 and tightly connected, completing the assembly operation of the sealing structure of this utility model.

[0047] In summary, the multi-core optical fiber penetration sealing structure of this utility model, by setting up a sealing chamber 10 and a fiber distribution tray 20, places the fiber distribution tray 20 inside the sealing cavity 13 of the sealing chamber 10. After the optical fiber bundle passes through the perforation 14, up to two optical fibers emerge from a single fiber perforation hole 211 of the fiber distribution plate 21. The sealant in the sealing cavity 13 can fill the gap between the optical fiber and the fiber distribution plate 21 and the gap between the two optical fibers, thus completing the sealing effect of the sealing cavity 13. This effectively solves the problem of gaps between optical fibers when at least three optical fibers pass through the same hole in the traditional penetration method, which causes product problems.

[0048] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A multi-core optical fiber through-cabin sealing structure, characterized in that, It includes a sealed chamber and a fiber distribution tray. The sealed chamber is provided with a partition, which divides the sealed chamber into a through-hole and a sealed chamber. The sealed chamber is used to fill with sealant. A perforation is opened in the middle of the partition, and the through-hole and the sealed chamber are connected through the perforation. The fiber distribution tray is placed inside the sealed cavity. The fiber distribution tray is provided with a fiber threading plate. The fiber threading plate is provided with a plurality of fiber threading holes spaced apart. The fiber threading holes are designed to allow up to two optical fibers to pass through.

2. The multi-core optical fiber through-cell sealing structure according to claim 1, characterized in that, It also includes a fiber spool, both the fiber splitter and the fiber spool are placed in the sealed cavity. The fiber splitter is placed in the sealed cavity at one end near the perforation, and the fiber spool is placed in the sealed cavity at one end near the opening. A fiber spool hole is provided in the middle of the fiber spool, and the optical fibers coming out of the perforation will pass through the fiber spool hole together to form an optical fiber bundle.

3. The multi-core optical fiber through-cell sealing structure according to claim 2, characterized in that, The synthetic fiber disc is provided with a third annular protrusion.

4. The multi-core optical fiber through-cell sealing structure according to claim 2, characterized in that, The synthetic fiber disc has a cylindrical structure.

5. The multi-core optical fiber through-cell sealing structure according to claim 2, characterized in that, The fiber distribution tray also includes a limiting plate extending from the periphery of the fiber threading plate, and the fiber combining tray is placed at one end of the limiting plate.

6. The multi-core optical fiber through-cell sealing structure according to claim 1 or 2, characterized in that, The sealed chamber has a first annular protrusion inside the sealed cavity, and the fiber-threaded plate is placed on the first annular protrusion. The cross-sectional diameter of the fiber-threaded plate is larger than the inner diameter of the first annular protrusion.

7. The multi-core optical fiber through-cell sealing structure according to claim 1 or 2, characterized in that, The sealed chamber has a second annular protrusion inside the through cavity.

8. The multi-core optical fiber through-cabin sealing structure according to claim 1 or 2, characterized in that, The two sides of the partition are conical.

9. The multi-core optical fiber through-cell sealing structure according to claim 1 or 2, characterized in that, The depth of the sealed cavity is greater than the depth of the protruding cavity.

10. The multi-core optical fiber through-cabin sealing structure according to claim 1 or 2, characterized in that, Both the sealed chamber and the fiber distribution disc are cylindrical in shape.

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