High-temperature-resistant optical fiber connector based on spring sheath protection and optical fiber sensor

Abstract

The utility model provides a high temperature resistant optical fiber connector based on spring sheath protection, the connector comprises a connector joint and a spring sheath, the connector joint comprises a first connecting part, a second connecting part, an arched buckle, a spring and an insertion core, the outer wall of the second connecting part is provided with a groove, and the spring sheath is arranged in the groove. The first connecting part, the second connecting part, the arched buckle, the spring and the spring sheath are made of the same high-temperature alloy; the inserting core is arranged in the second connecting part and is bonded and fixed with the second connecting part through high-temperature-resistant glue; and the spring sheath is fixed at the tail end of the second connecting part in a mechanical crimping manner and is used for protecting a connection transition area of the optical fiber sensor joint and the optical fiber. According to the technical scheme, the technical problems that in the prior art, a common optical fiber connector cannot work normally at high temperature, and a sensor is prone to being bent and broken due to the fact that the connecting position is impacted by external force during installation are solved.

Description

Technical Field

[0001] This utility model relates to the field of optoelectronic communication technology, and in particular to a high-temperature resistant fiber optic connector and fiber optic sensor based on spring sheath protection. Background Technology

[0002] Fiber optic sensors now enable long-distance, distributed measurements, providing more reliable and efficient sensing solutions for fields such as industrial automation and aerospace. Compared to electrical sensors, fiber optic sensors have significant advantages: they utilize optical signals for information transmission and detection, are unaffected by electromagnetic interference, and can operate stably in strong electromagnetic fields. Fiber optic sensors also possess high precision, high sensitivity, and resistance to corrosion and high temperatures, making them suitable for long-term monitoring in harsh environments.

[0003] Fiber optic connectors, as key components in optical communication systems, are currently mainly used for the transmission and measurement of fiber optic signals at room temperature. However, in specific high-temperature environments, such as the combustion chamber and turbine region of aircraft engines, operating temperatures can reach as high as 1500℃. Such extreme conditions pose a severe challenge to the performance of fiber optic connectors. Due to limitations in materials and structure, ordinary fiber optic connectors are difficult to operate normally in such high-temperature environments. Therefore, developing fiber optic connectors that can adapt to high-temperature environments has become a current research hotspot and challenge.

[0004] In the installation process of fiber optic sensors, the connection between the fiber optic connector and the fiber optic cable is undoubtedly one of the most sensitive parts. Due to significant structural differences, this area has relatively low resistance to external forces. During installation or subsequent use and maintenance, any improper operation or accidental impact can potentially damage this part.

[0005] Especially when fiber optic connectors or connecting parts are accidentally bent, the consequences are often catastrophic. Bending not only directly disrupts the original transmission path of the fiber, causing attenuation and distortion of the optical signal, thus significantly reducing the signal quality of the entire sensor and making it unable to accurately reflect the true state of the measured object, but more seriously, bending can also create stress concentration inside the fiber, leading to fiber breakage. Once the fiber breaks, the sensor system will completely lose its function and will no longer be able to provide effective monitoring data. Utility Model Content

[0006] This invention provides a high-temperature resistant fiber optic connector and fiber optic sensor based on spring sheath protection, which can solve the technical problems in the prior art where ordinary fiber optic connectors cannot work properly at high temperatures and where the sensor is easily bent and broken by external force impact at the connection point during installation.

[0007] According to one aspect of the present invention, a high-temperature resistant fiber optic connector based on spring sheath protection is provided. The connector includes a connector joint and a spring sheath. The connector joint includes a first connecting part, a second connecting part, an arched buckle, a spring, and a ferrule. The first connecting part is an ST-shaped cylinder, and the second connecting part is a hollow cylinder with a groove on its outer wall. The first connecting part, the second connecting part, the arched buckle, the spring, and the spring sheath are all made of the same high-temperature alloy.

[0008] The insert is set inside the second connecting part and is bonded and fixed to the second connecting part with high temperature resistant adhesive. The second connecting part is inserted into the first connecting part. The spring and the arched buckle are both passed through the second connecting part. The spring is compressed and fixed by the cooperation of the arched buckle and the groove.

[0009] The spring sheath is fixed to the tail end of the second connection part by mechanical crimping, and is used to protect the connection transition area between the fiber optic sensor connector and the fiber optic cable.

[0010] Furthermore, the high-temperature resistant adhesive is YK-8927.

[0011] Furthermore, the high-temperature alloy is GH3039.

[0012] Furthermore, the insert is made of precision ceramic.

[0013] According to another aspect of the present invention, an optical fiber sensor is provided, which includes the optical fiber connector proposed above in the present invention.

[0014] This invention provides a high-temperature resistant fiber optic connector and fiber optic sensor based on a spring-sheathed protection system. By integrating the spring sheath into the tail end of the fiber optic connector, the connector avoids external impacts during installation, protects the transition between the fiber optic connector and the fiber, and prevents internal fiber breakage due to external impacts, significantly increasing the lifespan of the fiber optic sensor. By using the same high-temperature alloy for the first connecting part, the second connecting part, the arched buckle, the spring, and the spring sheath, and by using high-temperature adhesive to fix the ferrule and the second connecting part, the high-temperature resistance of the fiber optic connector is improved, allowing it to operate normally in higher temperature environments compared to conventional fiber optic connectors. Attached Figure Description

[0015] The accompanying drawings, which form part of this specification, are provided to further illustrate embodiments of the present invention and, together with the textual description, explain the principles of the present invention. It is obvious that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0016] Figure 1 A schematic diagram of the overall structure of a high-temperature resistant fiber optic connector based on spring sheath protection according to a specific embodiment of the present invention is shown.

[0017] Figure 2 An exploded view of a high-temperature resistant fiber optic connector based on spring sheath protection provided according to a specific embodiment of the present invention is shown.

[0018] The above figures include the following reference numerals:

[0019] 10. Connector joint; 11. First connecting part; 12. Second connecting part; 13. Arched buckle; 14. Spring; 15. Molded core; 20. Spring sleeve; A. Adhesive position on the molted core; B. Adhesive position on the second connecting part. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0023] like Figure 1 As shown, according to a specific embodiment of the present invention, a high-temperature resistant fiber optic connector based on spring sheath protection is provided. The connector includes a connector joint 10 and a spring sheath 20. The connector joint 10 includes a first connecting part 11, a second connecting part 12, an arched buckle 13, a spring 14, and a ferrule 15. The first connecting part 11 is an ST-shaped cylinder, and the second connecting part 12 is a hollow cylinder with a groove on its outer wall. The first connecting part 11, the second connecting part 12, the arched buckle 13, the spring 14, and the spring sheath 20 are all made of the same high-temperature alloy.

[0024] The insert 15 is disposed in the second connecting part 12 and is bonded and fixed to the second connecting part 12 by high temperature resistant adhesive. The second connecting part 12 is inserted into the first connecting part 11. The spring 14 and the arched buckle 13 are both passed through the second connecting part 12. The spring 14 is compressed and fixed by the cooperation of the arched buckle 13 and the groove.

[0025] The spring sleeve 20 is fixed to the tail end of the second connection part 12 by mechanical crimping, and is used to protect the connection transition area between the fiber optic sensor connector 10 and the fiber optic cable.

[0026] This configuration provides a high-temperature resistant fiber optic connector with spring sleeve protection. By integrating the spring sleeve into the tail end of the fiber optic connector, this connector avoids external impacts during installation, protects the transition between the fiber optic connector and the fiber, and prevents internal fiber breakage due to external impacts, greatly increasing the service life of the fiber optic sensor. By using the same high-temperature alloy for the first connecting part, the second connecting part, the arched buckle, the spring, and the spring sleeve, and using high-temperature resistant adhesive to glue and fix the ferrule and the second connecting part, the high-temperature resistance of the fiber optic connector can be improved, allowing it to operate normally in higher temperature environments compared to conventional fiber optic connectors. Compared with the prior art, the technical solution of this utility model can solve the technical problems of ordinary fiber optic connectors failing to operate normally at high temperatures and the sensor easily bending and breaking due to external impacts during installation.

[0027] Furthermore, in this embodiment of the invention, the high-temperature resistant adhesive is YK-8927, the high-temperature alloy is GH3039, and the ferrule 15 is made of precision ceramic. This configuration improves the connection reliability of the connector at high temperatures.

[0028] To gain a further understanding of this utility model, the following is in conjunction with... Figure 1 and Figure 2 The high-temperature resistant fiber optic connector of this utility model is described in detail.

[0029] like Figure 1 and Figure 2 As shown, a high-temperature resistant fiber optic connector is provided according to a specific embodiment of the present invention, comprising two main parts: a high-temperature resistant fiber optic connector (connector connector 10) and a spring sheath 20 at the tail end.

[0030] The high-temperature resistant fiber optic connector is meticulously assembled from a precision ceramic ferrule 15 and connector components made of high-temperature alloy. The connector components include a first connecting part 11, a second connecting part 12, an arched latch 13, and a spring 14. The ceramic ferrule 15, with its excellent high-temperature resistance, corrosion resistance, and precise alignment characteristics, ensures stable transmission of fiber optic signals in extreme environments. The connector components are made of high-temperature alloy material, possessing high strength, good thermal stability, and mechanical properties, capable of withstanding various mechanical and thermal stresses in high-temperature environments. During manufacturing, the ceramic ferrule 15 and the connector components are tightly bonded together with a high-performance high-temperature adhesive, ensuring a stable connection even at high temperatures. The different connector components are assembled together using precise mechanical methods, ensuring a robust connector structure and reliable connection.

[0031] The spring sheath 20 at the tail end is made of the same high-temperature alloy as the connector components, which avoids internal stress concentration caused by the thermal expansion difference between different materials under high temperature environment, which may cause connector structure deformation, ferrule loosening or optical fiber breakage, thereby affecting the quality of signal transmission.

[0032] Specifically, such as Figure 2 As shown, the first connecting part 11 is an ST-shaped thin-walled cylinder, and the second connecting part 12 is a hollow column with a groove in the middle. This groove is adapted to the arched buckle 13. During connection, the insert 15 is first inserted into the cylinder of the second connecting part 12, and then... Figure 2 The adhesive positions A and B shown in the diagram bond the insert 15 to the second connecting part 12. The spring 14 is sleeved onto the second connecting part 12 from the tail end to form a whole. This whole is inserted into the first connecting part 11, and then the tail end of the spring is pressed to compress it to the groove position. The arched buckle 13 is used to lock it in the groove to keep the spring compressed. This completes the installation and fixation of the insert 15 and the connector parts. Finally, the spring sleeve 20 is fixed to the tail end of the second connecting part 12 by mechanical crimping with wire cutters.

[0033] Furthermore, in this embodiment of the invention, GH3039 high-temperature alloy is used as the main material of the connector body; that is, the first connecting part 11, the second connecting part 12, the arched buckle 13, and the spring 14 are all made of GH3039 high-temperature alloy. GH3039 is a nickel-based high-temperature alloy with excellent high-temperature strength, good oxidation resistance and corrosion resistance, and can maintain stable physical and chemical properties under extreme temperature environments. Precision machining of the GH3039 material ensures the high precision and excellent thermal stability of the connector body, laying a solid foundation for the long-term reliable operation of the fiber optic connector.

[0034] To address the issue of traditional epoxy resin adhesives failing at high temperatures, this invention replaces the 353ND optical component adhesive with YK-8927 high-temperature resistant adhesive. YK-8927 is a special adhesive designed specifically for high-temperature environments. Its unique formula allows it to withstand temperatures up to 1300℃ without losing its bonding strength, while also exhibiting excellent chemical resistance and electrical insulation properties.

[0035] In addition, the spring sheath is made of the same high-temperature alloy as the connector components to avoid internal stress concentration caused by the thermal expansion difference between different materials when the ambient temperature rises. This could lead to connector structural deformation, loosening of the ferrule, or fiber breakage, thereby affecting the quality of signal transmission.

[0036] According to another aspect of this invention, an optical fiber sensor is provided, which includes the optical fiber connector described above. Since the optical fiber connector described above can operate at higher temperatures and protect the transition portion between the optical fiber connector and the optical fiber from internal optical fiber breakage caused by external impact, its application in an optical fiber sensor can significantly improve the high-temperature resistance and service life of the optical fiber sensor.

[0037] In summary, this invention provides a high-temperature resistant fiber optic connector and fiber optic sensor based on a spring sleeve protection. By integrating the spring sleeve into the tail end of the fiber optic connector, this connector avoids external impacts during installation, protects the transition between the fiber optic connector and the fiber, and prevents internal fiber breakage due to external impacts, significantly increasing the lifespan of the fiber optic sensor. By using the same high-temperature alloy for the first connecting part, the second connecting part, the arched buckle, the spring, and the spring sleeve, and using high-temperature adhesive to fix the ferrule and the second connecting part, the high-temperature resistance of the fiber optic connector is improved, allowing it to operate normally at higher temperatures compared to conventional fiber optic connectors. Compared to existing technologies, this invention solves the technical problems of ordinary fiber optic connectors failing to operate normally at high temperatures and the sensor easily bending and breaking due to external impacts during installation.

[0038] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-temperature resistant fiber optic connector based on spring sheath protection, characterized in that, The connector includes a connector head (10) and a spring sleeve (20). The connector head (10) includes a first connecting part (11), a second connecting part (12), an arched buckle (13), a spring (14), and a core (15). The first connecting part (11) is an ST-shaped cylinder, and the second connecting part (12) is a hollow cylinder with a groove on its outer wall. The first connecting part (11), the second connecting part (12), the arched buckle (13), the spring (14), and the spring sleeve (20) are all made of the same high-temperature alloy. The insert (15) is disposed in the second connecting part (12) and is bonded and fixed to the second connecting part (12) by high temperature resistant adhesive. The second connecting part (12) is inserted into the first connecting part (11). The spring (14) and the arched buckle (13) are both inserted on the second connecting part (12). The spring (14) is compressed and fixed by the cooperation of the arched buckle (13) and the groove. The spring sheath (20) is fixed to the tail end of the second connecting part (12) by mechanical crimping, and is used to protect the connection transition area between the fiber optic sensor connector (10) and the fiber optic cable.

2. The connector according to claim 1, characterized in that, The high-temperature resistant adhesive is YK-8927.

3. The connector according to claim 2, characterized in that, The high-temperature alloy is GH3039.

4. The connector according to claim 3, characterized in that, The insert (15) is made of precision ceramic.

5. An optical fiber sensor, characterized in that, The fiber optic sensor includes the fiber optic connector as described in any one of claims 1 to 4.

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