Optical fiber penetration piece

Abstract

The invention provides an optical fiber penetration piece which comprises a penetration main piece, the penetration main piece is used for penetrating through an equipment shell, the penetration main piece is of a hollow structure with two open ends, the two open ends of the penetration main piece are respectively provided with a sealing assembly, and the sealing assemblies are provided with a plurality of through holes for armored optical fibers to pass through. The armored optical fiber comprises an optical fiber body and a protective sleeve, the optical fiber body is metalized, the protective sleeve is of a gold-plated structure, and the metalized optical fiber body is welded and connected with the gold-plated protective sleeve at the two ends of the protective sleeve through tin-antimony solder or tin-gold solder. The tin-antimony solder or the tin-gold solder has relatively low welding temperature, so that thermal damage to the optical fiber body can be reduced, the optical fiber body is prevented from being damaged due to overheating, and continuity and high quality of signal transmission are maintained; meanwhile, the tin-antimony solder or the tin-gold solder has good flowability and wettability and can be uniformly distributed at the connecting part of the optical fiber body and the protective sleeve, so that damage to the optical fiber body caused by local stress concentration is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of self-sealing optical fiber connectors, and in particular relates to an optical fiber penetration. Background Art

[0002] In today's era of rapid technological development, fiber optic communication plays a vital role in all fields. Whether in industrial production, scientific research experiments, or in the construction of communication networks, the stable transmission of fiber optic signals is one of the key factors to achieve efficient operation. However, in many practical application scenarios, optical fibers need to pass through the device casing to achieve signal connection. In this process, optical fibers face many potential risks and challenges. The traditional optical fiber structure is relatively fragile and is easily affected by external forces such as squeezing, pulling, and friction when passing through the device casing, resulting in damage to the optical fiber body, interruption of signal transmission, or degradation of quality.

[0003] In response to the above problems, Chinese utility model patent CN203414647U discloses a glass brazing optical fiber penetration, in which a protective tube section is provided on the periphery of the optical fiber body, and brazing glass is provided between the protective tube section and the optical fiber body. Although the above glass brazing optical fiber penetration provides protection for the optical fiber body to a certain extent, glass brazing usually requires a higher temperature to achieve connection, and high temperature can easily damage the optical fiber body due to overheating. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present application is to provide an optical fiber penetration piece that can prevent the optical fiber body from being damaged due to the force applied during the manufacturing process and the overheating caused by the welding process.

[0005] In order to solve the above problems, the present application provides an optical fiber penetration component, including a penetration main component, the penetration main component is used to penetrate the device housing, the penetration main component is a hollow structure with two open ends, the two open ends of the penetration main component are respectively provided with sealing components, and the sealing components are provided with a plurality of penetration holes for armored optical fibers to pass through;

[0006] The armored optical fiber includes an optical fiber body and a protective sleeve. The optical fiber body is metallized, and the protective sleeve is a gold-plated structure. The metallized optical fiber body is welded and connected to the gold-plated protective sleeve at both ends of the protective sleeve by tin-antimony solder or tin-gold solder.

[0007] Optionally, the length of the protective sleeve is greater than the length of the penetration main component, so that both ends of the protective sleeve can extend outside the penetration main component.

[0008] Optionally, a portion of the heat shrink sleeve of the optical fiber body extending out of the protective sleeve is provided with a nuclear-grade heat shrink tube for protecting the exposed optical fiber body.

[0009] Optionally, the inner wall of the through-main component is a stepped structure, and the stepped structure includes a first step, and the first step is used to limit the sealing assembly.

[0010] Optionally, the sealing assembly includes a sealing flange and a supporting block, wherein the sealing flange is located on a side of the supporting block facing the extending direction of the armored optical fiber, and the sealing flange is welded to the penetrating main component.

[0011] Optionally, the sealing assembly is an expansion block, and the inner wall of the through-hole main component is used to apply radial pressure to the expansion block, and under the action of the pressure, the expansion block is deformed and compressed, so that the inner diameters of several of the through holes are reduced.

[0012] Optionally, an isolation ring is provided on the joint surface between the protective sleeve and the sealing flange, and the isolation ring is also a gold-plated structure. The inner side of the gold-plated isolation ring is welded to the gold-plated protective sleeve by the tin-antimony solder or the tin-gold solder, and the outer side of the gold-plated isolation ring is connected to the sealing flange by argon arc welding or brazing.

[0013] Optionally, a sealing protective layer is provided on the molding surface of the tin-antimony solder or the tin-gold solder, and the sealing protective layer is made of silicone rubber or epoxy resin.

[0014] Optionally, a guide tube extending in the same direction as the armored optical fiber is provided in the penetration main component, the armored optical fiber is passed through the guide tube, the end of the guide tube is located in the support block and at least part of it is also located in the sealing flange.

[0015] Optionally, a mounting sleeve is provided at a position on the device housing that penetrates the penetrating main component, a detection cavity is formed inside the mounting sleeve, a detection hole is opened on the penetrating main component, and the detection hole is communicated with the detection cavity.

[0016] Beneficial Effects

[0017] The optical fiber penetration provided in the embodiment of the present invention is made by setting the armored optical fiber as a metalized optical fiber body and welding and connecting it with a gold-plated protective sleeve at both ends of the protective sleeve through tin-antimony solder or tin-gold solder, which can reduce the welding temperature, avoid damage to the optical fiber body due to overheating, and maintain the continuity and high quality of signal transmission; at the same time, the tin-antimony solder or tin-gold solder has good fluidity and wettability. During welding, it can be evenly distributed at the connection part between the optical fiber body and the protective sleeve to form a firm and uniform connection, avoiding damage to the optical fiber body caused by local stress concentration. At the same time, the metallization of the optical fiber body can improve the welding strength between the optical fiber body and the protective sleeve, and it is not easy to break or loosen when facing a large external force, extending the service life of the armored optical fiber and reducing the maintenance cost. At the same time, by setting a sealing component, the sealing performance of the optical fiber penetration can be improved while providing stable support for the armored optical fiber, thereby ensuring the quality and stability of optical fiber signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an optical fiber penetration member of an optional embodiment of the present application;

[0019] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 A schematic structural diagram of an optical fiber penetration member of another optional embodiment of the present application;

[0021] Figure 4 This is a schematic structural diagram of an optical fiber penetration piece in an optional embodiment of the present application when it is in an assembled state.

[0022] The reference numerals are:

[0023] 100. Equipment casing;

[0024] 1. Main penetration part; 11. Step structure; 12. Detection hole; 2. Armored optical fiber; 21. Optical fiber body; 22. Protective sleeve; 3. Nuclear-grade heat shrink tube; 4. Sealing flange; 5. Support block; 6. Isolation ring; 7. Sealing protective layer; 8. Guide tube; 9. Installation sleeve; 10. Expansion block. DETAILED DESCRIPTION

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] See also Figures 1 to 4 As shown, according to an embodiment of the present application, there is provided an optical fiber penetration component, including a penetration main component 1, the penetration main component 1 is used to penetrate the device housing 100, the penetration main component 1 is a hollow structure with two open ends, the two open ends of the penetration main component 1 are respectively provided with sealing components, and the sealing components are provided with a plurality of through holes for the armored optical fiber 2 to pass through; the armored optical fiber 2 includes an optical fiber body 21 and a protective sleeve 22, the optical fiber body 21 is metallized, the protective sleeve 22 is a gold-plated structure, and the metallized optical fiber body 21 is welded and connected to the gold-plated protective sleeve 22 at both ends of the protective sleeve 22 by tin-antimony solder or tin-gold solder.

[0030] It should be noted that tin-antimony solder or tin-gold solder has a relatively low welding temperature. During the welding process, the lower temperature can reduce the thermal damage to the optical fiber body 21, prevent the optical fiber body 21 from being damaged due to overheating, and maintain the continuity and high quality of signal transmission; at the same time, tin-antimony solder or tin-gold solder has good fluidity and wettability. During welding, it can be evenly distributed at the connection between the optical fiber body 21 and the protective sleeve 22 to form a firm and uniform connection, avoiding damage to the optical fiber body 21 caused by local stress concentration. At the same time, the metallization of the optical fiber body 21 can improve the welding strength between the optical fiber body 21 and the protective sleeve 22, and it is not easy to break or loosen when facing a large external force, thereby extending the service life of the armored optical fiber 2 and reducing maintenance costs.

[0031] The main penetration member 1 may be made of stainless steel and is used to penetrate the device housing 100 to provide a passage for the armored optical fiber 2 to pass through.

[0032] Specifically, the penetration main component 1 is an annular structure. The outer wall of the penetration main component 1 is tightly fitted with the device housing 100 and fixed by welding. The device housing 100 is provided with a mounting hole, and the penetration main component 1 can penetrate the device through the mounting hole.

[0033] The device housing 100 may be a shell structure such as a nuclear reactor containment vessel that has the function of protecting internal equipment, and this application does not limit this.

[0034] In order to maintain a specific environment inside the device, the two open ends of the penetration main part 1 are respectively provided with sealing components. For example, in some devices that need to maintain a specific air pressure, humidity or cleanliness, the sealing component can ensure that the internal environment of the device is not affected by changes in the external environment and ensure the normal operation of the device. In addition, the sealing component can also prevent external dust, water vapor, impurities, etc. from entering the penetration main part 1 and contacting the armored optical fiber 2, thereby affecting the signal transmission quality of the armored optical fiber 2 or even damaging the armored optical fiber 2.

[0035] In order to pass the armored optical fiber 2, a through hole is provided on the sealing component, the through hole is a straight hole, and the inner wall of the through hole is tightly fitted with the outer wall of the armored optical fiber 2. It can be understood that a plurality of through holes can be provided, and a plurality of armored optical fibers 2 are provided in a one-to-one correspondence with a plurality of through holes.

[0036] For some specific examples, see Figure 1 As shown, the sealing assembly includes a sealing flange 4 and a support block 5 . The sealing flange 4 is located on a side of the support block 5 facing the extending direction of the armored optical fiber 2 . The sealing flange 4 is welded to the penetration main component 1 .

[0037] It should be noted that by setting the sealing flange 4 and welding it to the through-main component 1, a very strong and tight connection can be formed, which greatly improves the sealing performance between the entire sealing component and the through-main component 1. It can effectively prevent external dust, water vapor, impurities, etc. from entering the interior through the connection between the sealing component and the through-main component 1, ensuring that the armored optical fiber 2 works in a relatively clean and stable environment, thereby ensuring the quality and stability of optical fiber signal transmission. At the same time, the support block 5 is provided to provide stable support for the armored optical fiber 2. In the process of the armored optical fiber 2 passing through the sealing component, it may be subjected to external forces from different directions. The support block 5 can withstand and disperse these external forces to reduce the direct impact on the armored optical fiber 2.

[0038] The support block 5 may be made of polysulfone, polyetheretherketone, polyethersulfone, polyimide or other special engineering plastics by machining or injection molding.

[0039] Specifically, support blocks 5 are respectively provided at the two open ends of the main component 1, which can not only provide stable support for the armored optical fiber 2, but also cooperate with the sealing flange 4 to further improve the sealing performance and reliability of the sealing assembly.

[0040] The sealing flange 4 is located on the side of the support block 5 away from the inner cavity of the main component 1 . The sealing flange 4 can be made of stainless steel and can provide protection for the support block 5 .

[0041] Specifically, the sealing flange 4 is welded to the penetration main part 1 to achieve seamless connection, ensuring that there is no looseness or leakage between the sealing flange 4 and the penetration main part 1. It can be understood that the welded sealing flange 4 and the penetration main part 1 form a whole, effectively preventing substances in the external environment from entering the inside of the penetration main part 1 through the connection. At the same time, this connection method can withstand greater pressure and external force and is suitable for various harsh working environments.

[0042] In some other specific embodiments, see Figure 3 As shown, the sealing component is a tightening block 10, and the inner wall of the main component 1 is used to apply radial pressure to the tightening block 10. Under the action of the pressure, the tightening block 10 is deformed and compressed, so that the inner diameters of several through holes are reduced.

[0043] It should be noted that when the inner wall of the through-hole main component 1 applies radial pressure to the expansion block 10, the expansion block 10 is deformed and compressed, so that the inner diameter of the through-hole is reduced. This adaptive characteristic can ensure that the expansion block 10 fits tightly with the armored optical fiber 2, and can always maintain a good sealing state regardless of whether the diameter of the armored optical fiber 2 has a certain tolerance or slight dimensional changes during use. At the same time, the expansion block 10 is compressed under pressure, forming a large friction force between the through-hole main component 1 and the armored optical fiber 2, so that the armored optical fiber 2 is firmly fixed in the sealing assembly. During the operation of the equipment, even if it is subjected to external forces such as vibration and impact, the armored optical fiber 2 is not easily displaced or loosened, ensuring the stability and continuity of signal transmission.

[0044] The expansion block 10 is an elastic structure, and can be made of elastomeric materials such as engineering plastics and rubber.

[0045] Specifically, when the expansion block 10 is in the initial state, the outer diameter of the expansion block 10 is slightly larger than the inner diameter of the through-body component 1, so that when the expansion block 10 is placed inside the through-body component 1, the inner wall of the through-body component 1 will exert an extrusion effect on the expansion block 10. At the same time, a number of through holes are provided on the expansion block 10 for the armored optical fiber 2 to pass through. Under the action of pressure, the expansion block 10 is deformed and compressed. Due to the elastic properties of the material, the expansion block 10 will shrink in the radial direction, making its overall volume smaller. At the same time, the inner diameter of the through hole on the expansion block 10 will also decrease as the expansion block 10 is deformed, so that it fits tightly with the outer wall of the armored optical fiber 2 passing through the through hole to achieve sealing.

[0046] The armored optical fiber 2 includes an optical fiber body 21 and a protective sleeve 22 . The optical fiber body 21 is made of glass and has good light transmission performance. The protective sleeve 22 is made of stainless steel and plays a role in protecting the optical fiber body 21 .

[0047] The protective sleeve 22 is a hollow structure with two ends open, and the optical fiber body 21 is passed through the protective sleeve 22, and the protective sleeve 22 is welded to the optical fiber body 21. It should be noted that the protective sleeve 22 can be set only on the outer periphery of the optical fiber body 21 that passes through the main part 1 to save costs.

[0048] Among them, at the welding position of the optical fiber body 21 and the protective sleeve 22, a layer of metal film can be deposited by chemical plating, electroplating or other methods, so that the surface of the optical fiber body 21 has certain metal properties, and the protective sleeve 22 forms a gold-plated structure, which is convenient for bonding with solder. In this embodiment, the welding position of the optical fiber body 21 and the protective sleeve 22 is located at both ends of the protective sleeve 22.

[0049] Specifically, the solder is tin-antimony solder or tin-gold solder, which has a relatively low welding temperature and can reduce thermal damage to the optical fiber body 21 during the welding process. At the same time, the tin-antimony solder or tin-gold solder has good fluidity and wettability, and can be evenly distributed at the connection between the optical fiber body 21 and the protective sleeve 22 to form a firm and uniform connection. It is understandable that during welding, the metallized optical fiber body 21 is inserted into both ends of the gold-plated protective sleeve 22, and then the tin-antimony solder or tin-gold solder is heated and melted using appropriate welding equipment and processes to fill the gap between the optical fiber body 21 and the protective sleeve 22. After the tin-antimony solder or tin-gold solder cools and solidifies, a firm welding connection can be formed.

[0050] In some possible implementations disclosed in this application, see Figures 1 to 3 As shown, the length of the protective sleeve 22 is greater than the length of the through-body 1 , so that both ends of the protective sleeve 22 can extend outside the through-body 1 .

[0051] Specifically, when the armored optical fiber 2 is installed in the penetration main part 1, both ends of the protective sleeve 22 will exceed the range of the penetration main part 1. In other words, the protective sleeve 22 has a portion extending out on both sides of the penetration main part 1.

[0052] It should be noted that the protective sleeve 22 extends beyond the main component 1 and also provides protection for the portion of the optical fiber body 21 at both ends of the main component 1. In practical applications, the areas at both ends of the main component 1 may be more susceptible to external environmental factors, such as collision, friction, dust, etc. The extended portion of the protective sleeve 22 can effectively prevent these factors from causing damage to the optical fiber. At the same time, the longer protective sleeve 22 can disperse the stress at the seal and avoid stress concentration at the connection between the main component 1 and the sealing assembly. This can reduce the risk of sealing failure and improve the overall sealing performance and reliability of the optical fiber penetration.

[0053] Furthermore, the extended portion of the protective sleeve 22 provides more operating space for installation and maintenance. For example, when welding or connecting other components, operations can be performed on the extended portion of the protective sleeve 22 to avoid interference with the optical fiber running through the main part 1. This helps to improve the quality of installation and maintenance and reduce damage to the optical fiber body 21 caused by improper operation.

[0054] In some possible implementations disclosed in this application, see Figures 1 to 3 As shown, the portion of the heat shrink sleeve extending from the protective sleeve 22 of the optical fiber body 21 is provided with a nuclear-grade heat shrink tube 3 for protecting the exposed optical fiber body 21. Thus, the exposed optical fiber body 21 can be prevented from being subjected to external mechanical damage, such as scratches, collisions, etc.

[0055] Among them, the nuclear-grade heat shrink tube 3 can be made of polymer materials such as cross-linked polyolefins and fluoroplastic-modified polyolefins, and has good high temperature resistance, radiation resistance, flame retardancy and chemical corrosion resistance. It can be understood that in the optical fiber penetration, the optical fiber body 21 is wrapped by the protective sleeve 22 for most of its length, but outside the optical fiber penetration, the optical fiber body 21 is in a bare state. The nuclear-grade heat shrink tube 3 can be sleeved on the exposed optical fiber body 21 by heat shrinking.

[0056] Specifically, when the exposed optical fiber body 21 is subjected to external force, the nuclear-grade heat shrink tube 3 can disperse the stress and reduce the possibility of stress concentration on the optical fiber body 21. This helps to reduce the risk of the optical fiber body 21 breaking due to excessive stress and improve the mechanical strength of the optical fiber body 21.

[0057] Furthermore, the nuclear-grade heat shrink tube 3 has good sealing properties, which can prevent water and moisture from entering the optical fiber body 21, and prevent the optical fiber from being affected by moisture and affecting the signal transmission quality. At the same time, for some special environments, such as the presence of chemical substances, the nuclear-grade heat shrink tube 3 can resist chemical corrosion and protect the optical fiber body 21 from being corroded by chemical substances. This helps to extend the service life of the optical fiber and ensure that it can still work stably in harsh environments.

[0058] In some possible implementations disclosed in this application, see Figures 1 to 3 As shown, the inner wall of the penetration main part 1 is a stepped structure 11, and the stepped structure 11 includes a first step, and the first step is used to limit the sealing component. As a result, the sealing component can be effectively prevented from axial displacement in the penetration main part 1. At the same time, the first step provides a clear installation position for the sealing component, so that the sealing component can be accurately installed in the penetration main part 1. This helps to ensure the matching accuracy between the sealing component and the penetration main part 1 and the armored optical fiber 2, and improve the sealing effect.

[0059] The inner wall penetrating the main part 1 is not a uniform cylindrical surface, but a stepped structure with different diameters.

[0060] Specifically, in this embodiment, a first step is provided on the inner wall of the penetration main part 1. When the sealing component is installed in the penetration main part 1, a part of the sealing component will contact the first step, thereby being blocked by the first step and stopping movement. At this time, the sealing component is in the correct installation position and can effectively cooperate with the armored optical fiber 2 to achieve the sealing function.

[0061] In some possible embodiments disclosed in the present application, when the sealing assembly is composed of a sealing flange 4 and a support block 5, see Figure 2As shown, an isolation ring 6 is provided on the joint surface between the protective sleeve 22 and the sealing flange 4. The isolation ring 6 is also a gold-plated structure. The inner side of the gold-plated isolation ring 6 is welded to the gold-plated protective sleeve 22 by tin-antimony solder or tin-gold solder, and the outer side of the gold-plated isolation ring 6 is connected to the sealing flange 4 by argon arc welding or brazing.

[0062] It should be noted that by providing the isolation ring 6 between the protective sleeve 22 and the sealing flange 4, a physical barrier is formed, which can prevent the heat of the sealing flange 4 from being directly transferred to the protective sleeve 22 during welding, thereby reducing the transfer of heat to the optical fiber body 21. At the same time, the isolation ring 6 is welded to the protective sleeve 22 by tin-antimony solder or tin-gold solder, and the welding temperature is low, which can prevent the optical fiber body 21 from being damaged due to overheating. At the same time, the isolation ring 6 is a gold-plated structure, which improves the welding strength of the isolation ring 6, thereby enhancing the sealing performance of the optical fiber penetration.

[0063] The isolation ring 6 may be made of stainless steel, and a layer of metal film is deposited on its surface by chemical plating, electroplating or other methods to form a gold-plated structure for easy bonding with solder.

[0064] Specifically, the isolating ring 6 is located at the joint surface between the protective sleeve 22 and the sealing flange 4, and plays the role of separation and connection. The isolating ring 6 is annular and matches the shape of the protective sleeve 22 and the sealing flange 4 to achieve tight connection and sealing.

[0065] The inner side of the gold-plated isolation ring 6 is welded to the gold-plated protective sleeve 22 by tin-antimony solder or tin-gold solder. This welding method utilizes the relatively low welding temperature of tin-antimony solder or tin-gold solder, reducing the risk of thermal damage to the optical fiber body 21. At the same time, tin-antimony solder or tin-gold solder has good fluidity and wettability, and can be evenly distributed at the connection between the isolation ring 6 and the protective sleeve 22 during the welding process, forming a firm and uniform connection.

[0066] The outer side of the gold-plated isolation ring 6 is connected to the sealing flange 4 by argon arc welding or brazing. Argon arc welding is a high-quality welding method that can provide good protective gas during the welding process to prevent oxidation and pollution, thereby obtaining a high-quality weld. Brazing uses a brazing material with a melting point lower than that of the connected materials to connect the connected materials together under heating conditions. Both welding methods can form a firm connection between the isolation ring 6 and the sealing flange 4.

[0067] In the above embodiments, see Figure 2 As shown, a sealing protective layer 7 is provided on the molding surface of the tin-antimony solder or the tin-gold solder, and the sealing protective layer 7 is made of silicone rubber or epoxy resin.

[0068] It should be noted that the sealing protective layer 7 can effectively fill the tiny gap between the solder and the surrounding components to prevent external dust, water vapor, impurities, etc. from entering the welding part through these gaps, thereby improving the overall sealing performance. At the same time, during the operation of the equipment, it may face the situation of internal pressure changes. The sealing protective layer 7 can withstand a certain pressure, maintain the sealing of the welding part, and prevent leakage caused by pressure changes.

[0069] Furthermore, the sealing protective layer 7 is made of silicone rubber or epoxy resin. Silicone rubber and epoxy resin have good corrosion resistance, which can protect the welding part from corrosion by external chemicals, and effectively extend the service life of the welding part. At the same time, silicone rubber and epoxy resin have certain high temperature resistance and can maintain stable performance at higher temperatures. This enables the welding part to adapt to different working temperature environments and improves the versatility of the optical fiber penetration.

[0070] In the above embodiments, see Figure 1 As shown, a guide tube 8 extending in the same direction as the armored optical fiber 2 is provided in the main component 1 , the armored optical fiber 2 is passed through the guide tube 8 , the end of the guide tube 8 is located in the support block 5 and at least part of it is also located in the sealing flange 4 .

[0071] It should be noted that by setting the guide tube 8 in the penetration main part 1, additional support is provided for the armored optical fiber 2. When the armored optical fiber 2 is subjected to external force, the guide tube 8 can share part of the force and reduce the pressure on the armored optical fiber 2. This helps to maintain the stability of the armored optical fiber 2 and prevent the armored optical fiber 2 from bending or breaking due to external force. At the same time, by setting at least part of the end of the guide tube 8 to be located in the sealing flange 4, it can assist in the centering of the multiple holes on the sealing flanges 4 at both ends of the penetration main part 1, thereby improving the assembly efficiency.

[0072] The guide tube 8 is a straight tube and extends in the same direction as the armored optical fiber 2. When the armored optical fiber 2 passes through the main part 1, the guide tube 8 provides a passage parallel to the armored optical fiber 2. The armored optical fiber 2 is placed inside the guide tube 8, and the guide tube 8 provides protection and guidance for the armored optical fiber 2.

[0073] Specifically, the end of the guide tube 8 passes through the support block 5 and is embedded in the through hole of the sealing flange 4, which can ensure that the transmission path of the armored optical fiber 2 is more stable and reduce the impact of the instability of the guide tube 8 on the armored optical fiber 2.

[0074] In some possible implementations disclosed in this application, see Figure 4As shown, a mounting sleeve 9 is provided at a position of the device housing 100 that penetrates the main part 1, a detection cavity is formed inside the mounting sleeve 9, and a detection hole 12 is opened on the main part 1, and the detection hole 12 is connected to the detection cavity. The mounting sleeve 9 and the detection hole 12 provide a special channel and space for leakage detection, thereby preventing the leakage problem from further expanding.

[0075] It can be understood that when a mounting sleeve 9 is provided at a position on the device housing 100 that penetrates the main component 1 , the mounting sleeve 9 is a part of the optical fiber penetration component, and the main component 1 is installed on the mounting sleeve 9 for use.

[0076] Among them, the detection hole 12 is a through hole that penetrates the main component 1, which is used to connect the inside of the main component 1 and the detection cavity of the installation sleeve 9. The detection cavity is a closed area, which is used to achieve specific detection functions, such as leak detection. It can be understood that when the detection hole 12 is connected to the detection cavity, the situation inside the main component 1 can be connected to the detection cavity through the detection hole 12. For example, if a leak occurs inside the main component 1 or specific substances need to be detected, these substances can enter the detection cavity through the detection hole 12, so that they can be detected by special detection equipment or methods.

[0077] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0078] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. An optical fiber penetration, characterized in that: The invention comprises a penetration main part (1), the penetration main part (1) is used to penetrate the device housing (100), the penetration main part (1) is a hollow structure with two open ends, the two open ends of the penetration main part (1) are respectively provided with sealing components, and the sealing components are provided with a plurality of through holes for the armored optical fiber (2) to pass through; The armored optical fiber (2) comprises an optical fiber body (21) and a protective sleeve (22); the optical fiber body (21) is metallized, the protective sleeve (22) is a gold-plated structure, and the metallized optical fiber body (21) is welded and connected to the gold-plated protective sleeve (22) at both ends of the protective sleeve (22) by tin-antimony solder or tin-gold solder.

2. The optical fiber penetration piece according to claim 1, characterized in that: The length of the protective sleeve (22) is greater than the length of the penetration main component (1), so that both ends of the protective sleeve (22) can extend outside the penetration main component (1).

3. The optical fiber penetration piece according to claim 1, characterized in that: The portion of the heat shrink sleeve of the optical fiber body (21) extending out of the protective sleeve (22) is provided with a nuclear-grade heat shrink tube (3) for protecting the exposed optical fiber body (21).

4. The optical fiber penetration piece according to claim 1, characterized in that: The inner wall of the through-body component (1) is a stepped structure (11), and the stepped structure (11) comprises a first step, and the first step is used to limit the sealing component.

5. The optical fiber penetration according to any one of claims 1 to 4, characterized in that: The sealing assembly comprises a sealing flange (4) and a support block (5); the sealing flange (4) is located on a side of the support block (5) facing the extension direction of the armored optical fiber (2); and the sealing flange (4) is welded to the through-body (1).

6. The optical fiber penetration according to any one of claims 1 to 4, characterized in that: The sealing component is a tightening block (10), and the inner wall of the through-hole main component (1) is used to apply radial pressure to the tightening block (10). Under the action of the pressure, the tightening block (10) is deformed and compressed, so that the inner diameters of several through-holes are reduced.

7. The optical fiber penetration piece according to claim 5, characterized in that: An isolation ring (6) is provided on the joint surface between the protective sleeve (22) and the sealing flange (4); the isolation ring (6) is also a gold-plated structure; the inner side of the gold-plated isolation ring (6) is welded to the gold-plated protective sleeve (22) by means of tin-antimony solder or tin-gold solder, and the outer side of the gold-plated isolation ring (6) is connected to the sealing flange (4) by means of argon arc welding or brazing.

8. The optical fiber penetration piece according to claim 7, characterized in that: A sealing protective layer (7) is provided on the molding surface of the tin-antimony solder or the tin-gold solder, and the sealing protective layer (7) is made of silicone rubber or epoxy resin.

9. The optical fiber penetration piece according to claim 5, characterized in that: A guide tube (8) extending in the same direction as the armored optical fiber (2) is arranged in the penetration main component (1); the armored optical fiber (2) is passed through the guide tube (8); the end of the guide tube (8) is located in the support block (5) and at least part of it is also located in the sealing flange (4).

10. The optical fiber penetration piece according to claim 1, characterized in that: A mounting sleeve (9) is provided at a position on the device housing (100) that penetrates the penetration main component (1), a detection cavity is formed inside the mounting sleeve (9), a detection hole (12) is opened on the penetration main component (1), and the detection hole (12) is connected to the detection cavity.

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