Optical fiber sealed joint and connection structure

Abstract

The utility model provides a kind of optical fiber sealing joint, including connector, connector is fixedly connected with vacuum cavity body, sealing piece one is equipped between connector and vacuum cavity body, sealing piece two is equipped between connector and optical fiber, multiple through holes one for optical fiber to pass through are equipped on connector, the outer side end of through hole one is equipped with the sealing hole two communicated with it, sealing piece two is arranged in sealing hole two, including multiple laminatedly arranged sealing ring two, multiple sealing ring two is extruded optical fiber by the radial deformation of the pressure along optical fiber in the axial direction of sealing hole two.The utility model is simple in structure, lower in installation requirement, easy to install, low in cost.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber connector technology, and in particular to an optical fiber sealing connector, and also to an optical fiber sealing connection structure. Background Technology

[0002] Optical fiber is a transmission tool that uses the principle of total internal reflection of light to transmit signals. Because light has an extremely low signal transmission loss rate in optical fiber, it is currently widely used in information transmission between various devices.

[0003] Currently, optical fibers are often used for signal exchange in a vacuum environment to achieve interconnection between various devices. However, when optical fibers located in the atmosphere penetrate into a vacuum cavity, gaps can easily appear at the connection point, potentially compromising the vacuum cavity's seal and making it difficult to maintain a vacuum environment within the processing chamber. Therefore, dedicated vacuum sealing connectors are typically used to seal the optical fiber connections in a vacuum environment. However, these dedicated vacuum fiber optic sealing connectors are expensive and have stringent installation requirements. Therefore, there is a need to develop a low-cost, easy-to-install sealing structure to achieve optical fiber sealing in a vacuum environment. Utility Model Content

[0004] The present invention aims to provide an optical fiber sealing connector to overcome the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: an optical fiber sealing connector, including a connector head, the connector head being fixedly connected to a vacuum cavity, a sealing element one being provided between the connector head and the vacuum cavity, a sealing element two being provided between the connector head and the optical fiber, the connector head having multiple through holes one for the optical fiber to pass through, a sealing hole two communicating with the outer end of the through hole one, the sealing element two being disposed in the sealing hole two, including multiple stacked sealing rings two, the multiple sealing rings two being compressed and sealed along the radial direction of the optical fiber by the pressure in the axial direction of the sealing hole two.

[0006] Furthermore, in the aforementioned fiber optic sealing connector, the end face of the connector connected to the vacuum cavity is provided with an annular sealing hole, and the sealing element is a sealing ring embedded in the sealing hole.

[0007] Furthermore, in the aforementioned fiber optic sealing connector, the second sealing element also includes multiple gaskets, which are rigid flat plates disposed between adjacent sealing rings, and the gaskets are clearance-fitted with the sealing holes.

[0008] Furthermore, in the aforementioned fiber optic sealing connector, the outer end of the connector is provided with a pressure cap, which presses against the outside of the sealing hole two, and the pressure cap is provided with a through hole two corresponding to the through hole one.

[0009] Furthermore, in the aforementioned fiber optic sealing connector, the depth of the second sealing hole is the sum of the thicknesses of the multiple gaskets and the sum of the thicknesses of the multiple second sealing rings under a compression ratio of 75-85%.

[0010] Furthermore, in the aforementioned fiber optic sealing connector, the connector head is fixedly connected to the vacuum cavity via a threaded connection or via fasteners.

[0011] This utility model also provides an optical fiber sealing connection structure, including the above-mentioned optical fiber sealing connector and flange plate. The flange plate is fixedly connected to the vacuum chamber, and the flange plate is provided with at least one set of mounting holes. Each set of mounting holes is used to install an optical fiber sealing connector, and the optical fiber sealing connector is sealed to the vacuum chamber through the flange plate.

[0012] Furthermore, in the aforementioned fiber optic sealed connection structure, the mounting hole group includes a threaded hole, the inner end of the connector is provided with a connecting part, and the outer side of the connecting part is provided with a thread, which is threadedly connected to the threaded hole.

[0013] Furthermore, in the aforementioned fiber optic sealed connection structure, the mounting hole group includes a mounting through hole, the inner end of the connector is provided with a connecting part, the connecting part is inserted into the mounting through hole, and the connecting part extends to the inner side of the flange plate and is threadedly connected to a nut located on the inner side of the flange plate.

[0014] Furthermore, in the aforementioned fiber optic sealed connection structure, the mounting hole group includes a guide through hole and multiple threaded holes. The main body of the connector is provided with multiple connection holes corresponding to the threaded holes. The connector is threadedly connected to the threaded holes by fasteners passing through the connection holes. The inner end of the connector is provided with a guide part, which is inserted into the guide through hole and has a clearance fit with the guide through hole.

[0015] Compared with the prior art, the advantages of this utility model are: the utility model has a simple structure, low installation requirements, easy installation, and low cost. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the fiber optic sealing connector of this utility model; Figure 2This is a cross-sectional structural diagram of the fiber optic sealing connector of this utility model; Figure 3 This is a schematic diagram of the first embodiment of the optical fiber sealed connection structure of this utility model; Figure 4 This is a schematic diagram of the second embodiment of the optical fiber sealed connection structure of this utility model; Figure 5 This is a schematic diagram of the third embodiment of the optical fiber sealed connection structure of this utility model; In the diagram: 10. Fiber optic sealing connector; 1. Vacuum chamber body; 2. Connector; 21. Through hole one; 22. Sealing hole one; 23. Sealing hole two; 24. Connecting part; 25. Connecting hole; 26. Guide part; 3. Seal one; 4. Seal two; 41. Sealing ring two; 42. Gasket; 5. Pressure cap; 51. Through hole two; 6. Flange plate; 61. Threaded hole one; 62. Mounting through hole; 63. Guide through hole; 64. Threaded hole two. Detailed Implementation

[0018] 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.

[0019] Example 1 like Figure 1-5 As shown, an optical fiber sealing connector 10 includes a connector 2, which is fixedly connected to a vacuum chamber 1. A sealing element 3 is provided between the connector 2 and the vacuum chamber 1 to seal the connection between the connector 2 and the vacuum chamber 1. A sealing element 4 is provided between the connector 2 and the optical fiber to seal the connection between the optical fiber and the vacuum chamber 1. The connector 2 has multiple through holes 21 for the optical fiber to pass through, generally two through holes 21, one for signal reflection and one for signal reception. A sealing hole 23 communicating with the outer end of the through hole 21 is provided. The sealing element 4 is located in the sealing hole 23 and includes multiple stacked sealing rings 41. The multiple sealing rings 41 are compressed and sealed along the radial direction of the optical fiber by the pressure in the axial direction of the sealing hole 23.

[0020] In the above structure, the end face of the connector 2 connected to the vacuum chamber 1 is provided with an annular sealing hole 22, and the sealing element 3 is a sealing ring embedded in the sealing hole 22.

[0021] In addition, the second seal 4 also includes multiple gaskets 42. The gaskets 42 are rigid flat plates, disposed between adjacent second seal rings 41, and the gaskets 42 are clearance-fitted with the second sealing hole 23. By setting the gaskets 41, the adjacent second seal rings 41 can be prevented from being squeezed and deformed along the optical fiber axis, thereby causing the multiple stacked second seal rings 41 to contract axially and expand radially, achieving the best radial sealing effect.

[0022] The outer end of the connector 2 is provided with a pressure cap 5. The pressure cap 5 is detachably connected to the connector 2 by fasteners. The pressure cap 5 is pressed against the outside of the sealing hole 23, and the pressure cap 5 is provided with a through hole 21 corresponding to the through hole 21.

[0023] The depth of sealing hole 23 is the sum of the thicknesses of the multiple gaskets 42 and the sum of the thicknesses of the multiple sealing rings 41 under a compression ratio of 75-85%. For example, seal 4 includes three sealing rings 41 and two gaskets 42. The thickness of the gaskets 42 is 1.2 mm. The thickness of the sealing rings 41 before compression is 2.6 mm, and the maximum compression is 0.6 mm. Under a compression ratio of 75-85%, the thickness of the sealing rings 41 after compression is 2.6 - 0.6 * 75 - 85% = 2.09 - 2.15 mm. The depth of sealing hole 23, H = 1.2 * 2 + (2.09 - 2.15) * 3 = 8.67 - 8.85 mm.

[0024] In addition, the connector 2 is provided with an installation structure for connecting to the vacuum chamber 1. The installation structure is fixedly connected to the vacuum chamber 1 by a threaded connection or by a fastener.

[0025] This invention achieves a sealed connection between the optical fiber and the vacuum cavity through sealing element 3 and sealing element 4. It features a simple structure, easy installation, and low cost. This invention is suitable for sealing optical fibers in vacuum environments, and is particularly suitable for sealing optical fibers in low-vacuum environments.

[0026] Example 2 like Figure 3-5 As shown, this utility model also provides an optical fiber sealing connection structure, including the aforementioned optical fiber sealing connector 10 and flange plate 6. Flange plate 6 is fixedly connected to the vacuum chamber 1, and can be disassembled and connected by welding or fasteners. Flange plate 6 has at least one set of mounting holes, each set used to install one optical fiber sealing connector 10. The optical fiber sealing connector is sealed to the vacuum chamber through flange plate 6. It should be noted that the number of mounting hole sets on the flange plate can be set according to actual needs, and unused mounting hole sets can be sealed with sealing plugs.

[0027] In one embodiment, such as Figure 3As shown, the mounting hole assembly includes a threaded hole 61, and the inner end of the connector 2 is provided with a connecting part 24. The outer side of the connecting part 24 is provided with threads, which are threadedly connected to the threaded hole 61.

[0028] In one embodiment, such as Figure 4 As shown, the mounting hole assembly includes a mounting through hole 62. The inner end of the connector 2 is provided with a connecting part 24. The connecting part 24 is inserted into the mounting through hole 62 and extends to the inner side of the flange plate 6 to be threadedly connected to the nut located on the inner side of the flange plate 6.

[0029] In one embodiment, such as Figure 5 As shown, the mounting hole group includes a guide through hole 63 and multiple threaded holes 64. The main body of the connector 2 is provided with multiple connecting holes 25 corresponding to the threaded holes 64. The connector 2 is threadedly connected to the threaded holes 64 by fasteners passing through the connecting holes 25. The inner end of the connector 2 is provided with a guide part 26, which is inserted into the guide through hole 63 and has a clearance fit with the guide through hole 63. The guide part 26 initially positions the installation position of the connector and guides the optical fiber to be inserted into the vacuum chamber.

[0030] Accordingly, the connector 2 of this utility model has an installation structure corresponding to the above embodiment. The installation structure is fixedly connected to the vacuum chamber 1 by a threaded connection or by a fastener.

[0031] The fiber optic sealing connection structure of this invention integrates multiple sealing joints through a flange plate, reducing the processing of the vacuum cavity, lowering installation requirements, and improving installation convenience.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An optical fiber sealed splice, characterized by: The device includes a connector that is fixedly connected to a vacuum chamber. A first seal is provided between the connector and the vacuum chamber, and a second seal is provided between the connector and the optical fiber. The connector has multiple through holes for the optical fiber to pass through. A second sealing hole is provided at the outer end of each through hole. The second seal is located inside the second sealing hole and includes multiple stacked sealing rings. The multiple sealing rings are compressed and sealed along the radial direction of the optical fiber by the pressure in the axial direction of the second sealing hole.

2. The optical fiber sealed splice of claim 1, wherein: The connector is provided with an annular sealing hole on the end face where it connects to the vacuum chamber, and the sealing element is a sealing ring embedded in the sealing hole.

3. The optical fiber sealed splice of claim 1, wherein: The second sealing element also includes multiple gaskets, which are rigid flat plates disposed between adjacent sealing rings, and the gaskets are clearance-fitted with the sealing holes.

4. The optical fiber sealed splice of claim 2, wherein: The outer end of the connector is provided with a pressure cap, which presses against the outside of the sealing hole two, and the pressure cap is provided with a through hole two corresponding to the through hole one.

5. The optical fiber sealed splice of claim 3, wherein: The depth of the second sealing hole is the sum of the thicknesses of the multiple gaskets and the sum of the thicknesses of the second sealing rings under a compression ratio of 75-85%.

6. The optical fiber sealed splice of claim 1, wherein: The connector is fixedly connected to the vacuum chamber via a threaded connection or via fasteners.

7. A fiber optic sealed connection structure, characterized in that: The device includes a flange plate and an optical fiber sealing connector as described in any one of claims 1-6. The flange plate is fixedly connected to the vacuum chamber, and the flange plate is provided with at least one set of mounting holes. Each set of mounting holes is used to install an optical fiber sealing connector, and the optical fiber sealing connector is sealed to the vacuum chamber through the flange plate.

8. The optical fiber sealed connection structure according to claim 7, characterized by: The mounting hole assembly includes a threaded hole, the inner end of the connector is provided with a connecting part, and the outer side of the connecting part is provided with a thread, which is threadedly connected to the threaded hole.

9. The fiber optic sealed connection structure according to claim 7, characterized in that: The mounting hole assembly includes a mounting through hole, and the inner end of the connector is provided with a connecting part. The connecting part is inserted into the mounting through hole and extends to the inner side of the flange plate to be threadedly connected to a nut located on the inner side of the flange plate.

10. The optical fiber sealed connection structure according to claim 7, characterized by: The mounting hole group includes a guide through hole and multiple threaded holes. The main body of the connector is provided with multiple connecting holes corresponding to the threaded holes. The connector is threadedly connected to the threaded holes by fasteners passing through the connecting holes. The inner end of the connector is provided with a guide part, which is inserted into the guide through hole and has a clearance fit with the guide through hole.

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