Optical distribution apparatus and optical splitter module

Abstract

The utility model provides an optical distribution device and optical splitter module belong to the field of light guide element, this optical splitter module includes module casing and at least one optical splitter unit of setting in module casing, when using, the box body of module casing is installed into the box body and is connected with the box body through buckle connection structure to make the optical splitter module can dismantle, the box body of module casing is provided with input interface and output interface for connecting optical fiber, an optical splitter unit connects an input interface and at least two output interfaces. The optical distribution device includes the optical splitter module above. The utility model passes through the multiple structure that is independent each other in unification can dismantle and installs in same box body, is convenient to unified management again, and is convenient to on -line maintenance or replacement.

Description

Technical Field

[0001] This utility model belongs to the field of optical guiding elements, and in particular relates to optical distribution devices and beam splitter modules. Background Technology

[0002] Signal transmission between the converter valve control system and the converter is a core component for the stable operation of a DC transmission system. Its reliability directly affects the power conversion efficiency and system safety. Generally, multiple optical fibers are used to transmit different signals in parallel between the converter valve control system and the converter.

[0003] Mirroring and replicating optical fiber communication links are typically achieved using optical splitters. However, with a large number of optical fiber communication links, centralized management of these splitters becomes difficult. To address this technical problem, Chinese utility model patent application CN208351072U discloses an optical splitter. This splitter integrates multiple interfaces on its front panel, and houses multiple splitting modules within the cabinet. Each splitting module contains multiple couplers, and optical fibers connected to these couplers exit the splitting modules and connect to the interfaces on the front panel of the cabinet. This allows multiple optical paths to be controlled with a single splitter, facilitating centralized management.

[0004] During long-term operation, optical splitters inevitably experience problems such as insufficient splitting uniformity and weakened output optical power due to aging and damage to optical components, optical fibers, and flange joints. When these problems occur, timely repair or replacement is necessary. The converter valve control system relies on optical fiber for signal transmission with the converter. During the repair or replacement of the optical splitter, the signal transmission between the converter valve control system and the converter must be completely disconnected, affecting the normal operation of the DC transmission system. In this case, the DC transmission system needs to be de-energized. A power outage in the DC transmission system can lead to widespread blackouts in the receiving-end power grid, voltage fluctuations and frequency instability in the sending-end power grid, and even regional power grid collapse, causing significant economic losses. Utility Model Content

[0005] The purpose of this invention is to provide an optical distribution device to solve the technical problem that the maintenance and replacement of integrated optical splitters in the prior art cannot be carried out online; Another objective of this invention is to provide a beam splitter module to solve the aforementioned technical problems.

[0006] To achieve the above objectives, the technical solution of the optical distribution device provided by this utility model is as follows: An optical splitter includes a housing with a front opening. At least two splitter modules are installed in the housing through the front opening. Each splitter module includes a module housing and at least one splitter unit disposed within the module housing. A snap-fit ​​connection structure is provided between the inner part of the module housing and the housing to allow the splitter module to be detached. The outer part of the module housing has an input interface and an output interface for connecting optical fibers. One splitter unit is connected to one input interface and at least two output interfaces.

[0007] As a further improvement, the beam splitter module has a sheet-like structure, with each beam splitter module arranged along its thickness direction. The input and output interfaces are both located on the front end face of the module housing and arranged in a straight line, with the arrangement direction of the input and output interfaces perpendicular to the thickness direction of the beam splitter module.

[0008] As a further improvement, the input and output interfaces are arranged vertically, and a pull plate is provided on the front end face of the module housing to pull the splitter module out of the housing. The pull plate is located below each input and output interface of the module housing to support the optical fiber during use.

[0009] As a further improvement, the inner side of the housing is provided with a guide groove extending forward and backward. The module housing includes a shell body with an opening on one side and a cover that covers and is fixed to one side of the shell body opening. The thickness direction of the cover is the same as the thickness direction of the beam splitter module. At least one edge of the cover protrudes from the shell body and forms a guide protrusion. During the process of inserting or removing the beam splitter module from the housing, the guide protrusion and the corresponding guide groove guide each other.

[0010] As a further improvement, the snap-fit ​​connection structure includes a snap-fit ​​protrusion on the rear end face of the beam splitter unit, and a mating groove inside the housing for the snap-fit ​​protrusion to enter. One of the snap-fit ​​protrusion and the mating groove is provided with a snap-fit ​​groove, and the other is provided with a snap-fit ​​connector that can be snapped into the snap-fit ​​groove to prevent the beam splitter module from coming out.

[0011] As a further improvement, on the same side of the module housing, the surface of the outer part of the module housing is higher than the surface of the inner part of the module housing. A stop step surface is formed between the two parts, which can stop and cooperate with the front end of the housing in the front-rear direction to realize the insertion and positioning of the splitter module. A notch groove is provided between the stop step surface and the corresponding side surface of the inner part of the module housing.

[0012] The beneficial effects are as follows: The optical distribution device provided by this utility model is a pioneering invention. This optical distribution device, by uniformly and detachably installing multiple structurally independent optical splitter modules in the same housing, facilitates unified management and allows for individual online repair or replacement of individual optical splitter modules in case of aging or failure. During this process, it maintains normal signal transmission between the converter valve control system and the converter, as well as the normal operation of the DC power transmission system, greatly reducing economic losses.

[0013] To achieve the above objectives, the technical solution of the beam splitter module provided by this utility model is as follows: A splitter module includes a module housing and at least one splitter unit disposed within the module housing. In use, the inner part of the module housing is installed into the housing and connected to the housing via a snap-fit ​​connection structure to make the splitter module detachable. The outer part of the module housing is provided with an input interface and an output interface for connecting optical fibers. One splitter unit is connected to one input interface and at least two output interfaces.

[0014] As a further improvement, the beam splitter module has a sheet-like structure, with both the input and output interfaces located on the front end face of the module housing and arranged in a straight line. The arrangement direction of the input and output interfaces is perpendicular to the thickness direction of the beam splitter module.

[0015] As a further improvement, the input and output interfaces are arranged vertically, and a pull plate is provided on the front end face of the module housing to pull the splitter module out of the housing. The pull plate is located below each input and output interface of the module housing to support the optical fiber during use.

[0016] As a further improvement, the module housing includes a body with an opening on one side and a cover that covers and is fixed to the opening on one side of the body. The thickness direction of the cover is the same as the thickness direction of the splitter module. At least one edge of the cover protrudes from the body and forms a guide protrusion. The guide protrusion is used to guide and engage with the corresponding guide groove on the housing during the insertion or removal of the splitter module from the housing.

[0017] As a further improvement, a snap-fit ​​protrusion is provided on the rear end face of the beam splitter unit. The side of the snap-fit ​​protrusion is provided with a snap-fit ​​groove. The snap-fit ​​groove is used to snap with the snap-fit ​​connector in the housing after the beam splitter module is installed in the housing to prevent the beam splitter module from coming out.

[0018] As a further improvement, on the same side of the module housing, the surface of the outer part of the module housing is higher than the surface of the inner part of the module housing. A stop step surface is formed between the two parts, which can stop and cooperate with the front end of the housing in the front-rear direction to realize the insertion and positioning of the splitter module. A notch groove is provided between the stop step surface and the corresponding side surface of the inner part of the module housing.

[0019] The beneficial effects are as follows: The beam splitter module provided by this utility model is a pioneering invention. Multiple beam splitter modules can be used in combination. These modules are structurally independent yet uniformly detachable and installed in the same housing, facilitating unified management and allowing for individual online repair or replacement of individual modules in case of aging or failure. During this process, normal signal transmission between the converter valve control system and the converter, as well as the normal operation of the DC transmission system, are maintained, significantly reducing economic losses. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the light distribution device in this utility model; Figure 2 This is a schematic diagram of the box structure in Embodiment 1 of the light distribution device of this utility model; Figure 3 This is a partial structural diagram of the front side of the housing of Embodiment 1 of the light distribution device in this utility model. Figure 4 This is a schematic diagram of the structure of the beam splitter module in Embodiment 1 of the optical distribution device of this utility model; Figure 5 This is a schematic diagram of the beam splitter module from another perspective in Embodiment 1 of the light distribution device of this utility model; Figure 6 This is a cross-sectional view of Embodiment 1 of the light distribution device in this utility model.

[0021] Explanation of reference numerals in the attached figures: 1. Cabinet; 11. Partition; 12. Guide groove; 13. Mating groove; 14. Snap-fit ​​connector; 15. Connecting ear; 2. Splitter module; 21. Inner part of the cabinet; 22. Outer part of the cabinet; 23. Pull plate; 24. Shell; 25. Shell cover; 26. Guide protrusion; 27. Snap-fit ​​protrusion; 28. Snap-fit ​​groove; 29. ​​Stop step surface; 210. Notch groove; 3. Optical fiber. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the embodiments.

[0023] Specific Embodiment 1 of the optical distribution device provided by this utility model: See appendix Figure 1 The optical distribution device includes a housing 1 and beam splitter modules 2, of which thirty beam splitter modules 2 are provided. The number of beam splitter modules 2 can be selected as needed, with a minimum of two beam splitters configured in one housing 1.

[0024] See appendix Figure 2 and attached Figure 3The front opening of the housing 1 allows each beam splitter module 2 to be installed into the housing 1 through the front opening. A partition 11 is provided inside the housing 1 to form a support between the upper and lower side walls of the housing 1. Guide grooves 12 extending in the front-rear direction are provided on the inner surfaces of both the upper and lower side walls of the housing 1, and the number of guide grooves 12 on the same side wall is the same as the number of beam splitter modules 2.

[0025] See appendix Figure 4 and attached Figure 5 The beam splitter module 2 is generally sheet-shaped, with its thickness direction parallel to the left-right direction, and all beam splitter modules 2 are arranged along the left-right direction. The beam splitter module 2 includes a module housing and two beam splitter units disposed within the module housing. Each beam splitter unit can split one input signal line into two signal lines. In other embodiments of this implementation, the number of beam splitter units in the beam splitter module 2 can be set to one, three, or more as needed, and the beam splitter unit can also split one signal line into three or four signal lines.

[0026] Combined with appendix Figure 6 The rear half of the beam splitter module 2 is located inside the housing 1, which is the inner part 21 of the beam splitter module 2. The front half of the beam splitter module 2 is located outside the housing 1, which is the outer part 22 of the beam splitter module 2. The outer part 22 of the module housing is provided with input and output interfaces for connecting optical fibers 3. Each beam splitter unit is connected to one input interface and two output interfaces. The input and output interfaces are all located on the front end face of the module housing and are arranged along the vertical direction.

[0027] A pull plate 23 protrudes from the front end face of the module housing, extending forward to facilitate the operator in pulling the splitter module 2 out of the housing 1. The pull plate 23 is located below all input and output interfaces, so that after the input and output interfaces are all inserted with optical fibers 3, the pull plate 23 can also support the optical fibers 3, preventing them from being damaged by excessive drooping over a long period of time.

[0028] The module housing includes a body 24 and a cover 25. The body 24 has an opening on one side in the left-right direction. The cover 25 is flat and covers the opening on one side of the body 24, and is fixedly connected to the body 24 by bolts. A pull plate 23 is integrally formed on the body 24. The upper and lower edges of the cover 25 protrude from the body 24 and form guide protrusions 26. During the insertion or removal of the beam splitter module 2 from the housing 1, the guide protrusions 26 guide and cooperate with the corresponding guide grooves 12, thereby facilitating the installation of each beam splitter module 2, and also limiting the left-right direction of each beam splitter module 2.

[0029] A snap-fit ​​connection structure is provided between the inner part 21 of the module housing and the housing 1 to facilitate the quick installation and disassembly of the beam splitter module 2. The snap-fit ​​connection structure includes a snap-fit ​​protrusion 27 on the rear end face of the module housing and a mating groove 13 on the inner side of the rear wall of the housing. The mating groove 13 extends in the left-right direction. After the beam splitter module 2 is installed in place, the snap-fit ​​protrusion 27 can fit into the mating groove 13.

[0030] The upper and lower sides of the snap-fit ​​protrusion 27 are provided with snap-fit ​​grooves 28, and the upper and lower sidewalls of the mating groove 13 are provided with snap-fit ​​connectors 14 corresponding to the positions of the snap-fit ​​protrusion 27. After the beam splitter module 2 is installed in place, the snap-fit ​​connectors 14 can be snapped into the slots, thereby preventing the beam splitter module 2 from being removed from the housing 1. The snap-fit ​​groove 28 is an arc groove, and the snap-fit ​​connector 14 is a ball head with a certain degree of elasticity. During the process of the snap-fit ​​protrusion entering the mating groove 13, the snap-fit ​​protrusion can squeeze between the corresponding upper and lower snap-fit ​​connectors 14, thereby making the snap-fit ​​connector 14 snap into the snap-fit ​​groove 28. In other embodiments, the snap-fit ​​protrusion can also be configured as a structure that can be elastically deformed. In other embodiments, the snap-fit ​​connector 14 can also be a ball snap.

[0031] In this embodiment, the snap-fit ​​connection structure only begins to engage when the beam splitter module 2 is almost fully installed, thus ensuring minimal resistance during the initial installation process. Furthermore, placing the snap-fit ​​connection structure at the rear of the housing 1 and the beam splitter module 2 saves vertical space on both sides, resulting in a smaller vertical dimension of the light distribution device.

[0032] On the upper and lower sides of the module housing, the surface of the outer part 22 of the module housing is higher than the surface of the inner part 21 of the module housing, and a stop step surface 29 is formed between the two parts. When the beam splitter module 2 is installed in place, the stop step surface 29 can stop and cooperate with the front end face of the housing 1, thereby realizing the positioning of the beam splitter module 2, and at the same time, it can indicate to the operator that the beam splitter module 2 has been installed in place.

[0033] A notch 210 is provided between the stop step surface 29 and the corresponding side surface of the inner part 21 of the module housing. The cross-section of the notch 210 is arc-shaped. This reduces stress concentration at this location and prevents interference between the corresponding internal corner and the housing 1 due to manufacturing errors, thus avoiding the splitter module 2 not being able to be installed properly. In other embodiments, if the processing precision is high, the notch 210 may not be provided.

[0034] Connecting ears 15 are provided on the left and right sides near the rear end of the enclosure 1. Connecting ears 15 are provided with connecting holes to facilitate fixing the enclosure 1 to a specific frame for easy installation and management.

[0035] During use, all optical splitter modules 2 can be uniformly installed on the housing 1, facilitating centralized management. At the same time, each optical splitter module 2 is independent in function and structure. When one of the optical splitter modules 2 ages or fails, the optical fiber 3 connected to that optical splitter module 2 can be directly removed, and then the optical splitter module 2 can be repaired or replaced. During this process, the other optical splitter modules 2 are not affected.

[0036] In actual use, some redundant links are reserved between the converter valve control system and the converter. After the fiber optic cable 3 on the aging or faulty splitter module 2 is removed, the corresponding link will automatically switch to a redundant link that does not participate in signal transmission. This will not cause the communication between the converter valve control system and the converter to be interrupted, so there is no need to shut down the DC transmission system, which effectively reduces the corresponding economic losses.

[0037] Specific Embodiment 2 of the optical distribution device provided by this utility model: This embodiment is based on Embodiment 1, but differs from Embodiment 1 in that the thickness direction of the beam splitter module is parallel to the vertical direction, and the beam splitter modules are arranged along the vertical direction. The input and output interfaces are located on the front end face of the module housing and arranged along the horizontal direction. Correspondingly, guide protrusions on the beam splitter modules are provided on the left and right sides.

[0038] Specific Embodiment 3 of the optical distribution device provided by this utility model: This embodiment is described as Embodiment 1. The difference between Embodiment 1 and Embodiment 1 is that in this embodiment, the cross-sectional shape of the beam splitter module perpendicular to the front-back direction is square, and the input interface and output interface are located on the front end face of the module housing and arranged in a matrix.

[0039] Specific embodiment 4 of the optical distribution device provided by this utility model: This embodiment is based on Embodiment 1. The difference between Embodiment 1 and Embodiment 1 is that the housing in this embodiment has a honeycomb structure with multiple non-interconnected cavities. Each cavity corresponds to the installation of a beam splitter module. The cavity sidewalls can be used to guide the installation and removal of the beam splitter module. Therefore, no guide structure is required between the beam splitter module and the housing.

[0040] In this embodiment, the cross-sectional shape of the beam splitter module can be square or regular hexagonal, so as to facilitate the close arrangement of the beam splitter modules.

[0041] Specific embodiment 5 of the optical distribution device provided by this utility model: This embodiment is based on Embodiment 1, but differs from Embodiment 1 in that the snap-fit ​​groove is located on the upper and lower side walls of the mating groove, while the snap-fit ​​connector is located on the upper and lower sides of the snap-fit ​​protrusion. In this embodiment, either the snap-fit ​​connector or the groove wall needs to have elasticity.

[0042] Specific embodiment 6 of the optical distribution device provided by this utility model: This embodiment is described as Embodiment 1. The difference between Embodiment 1 and Embodiment 1 is that the snap-fit ​​connection structure in this embodiment includes snap-fit ​​holes opened on the upper and lower side walls of the housing, and also includes elastic protrusions provided on the upper and lower side surfaces of the module housing. After the beam splitter module is installed in place, the elastic protrusions snap into the snap-fit ​​holes, thereby preventing the beam splitter module from coming out.

[0043] Specific embodiment 7 of the optical distribution device provided by this utility model: This embodiment is based on Embodiment 1. The difference between Embodiment 1 and Embodiment 1 is that no pull plate is provided in this embodiment. The operator can grasp the outer part of the beam splitter module's housing to disassemble and assemble the beam splitter module.

[0044] Specific implementation of the beam splitter module provided by this utility model: The beam splitter module is the beam distribution module in the specific embodiment of the above-mentioned beam distribution device, and will not be described again.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. 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. An optical distribution apparatus, characterized by, The device includes a housing with a front opening. At least two optical splitter modules are installed inside the housing through the front opening. Each optical splitter module includes a module housing and at least one optical splitter unit disposed within the module housing. A snap-fit ​​connection structure is provided between the inner part of the module housing and the housing to allow the optical splitter module to be detached. The outer part of the module housing is provided with an input interface and an output interface for connecting optical fibers. One optical splitter unit is connected to one input interface and at least two output interfaces.

2. The light distribution device of claim 1, wherein, The beam splitter module has a sheet-like structure, with each beam splitter module arranged along its thickness direction. The input and output interfaces are both located on the front end face of the module housing and arranged in a straight line. The arrangement direction of the input and output interfaces is perpendicular to the thickness direction of the beam splitter module.

3. The light distribution arrangement of claim 2, wherein The input and output interfaces are arranged vertically. The front end face of the module housing has a pull plate for pulling the splitter module out of the housing. The pull plate is located below each input and output interface of the module housing to support the optical fiber during use.

4. An apparatus according to claim 2 or 3, characterised in that, The inner side of the housing is provided with a guide groove extending forward and backward. The module housing includes a shell body with an opening on one side and a cover that covers and is fixed to one side of the shell body opening. The thickness direction of the cover is the same as the thickness direction of the beam splitter module. At least one edge of the cover protrudes from the shell body and forms a guide protrusion. During the process of inserting or removing the beam splitter module from the housing, the guide protrusion cooperates with the corresponding guide groove.

5. An optical distribution device according to any of claims 1-3, characterized in that The snap-fit ​​connection structure includes a snap-fit ​​protrusion on the rear end face of the splitter unit, and a mating groove inside the housing for the snap-fit ​​protrusion to enter. One of the snap-fit ​​protrusion and the mating groove is provided with a snap-fit ​​groove, and the other is provided with a snap-fit ​​connector that can be snapped into the snap-fit ​​groove to prevent the splitter module from coming out.

6. An optical distribution device according to any of claims 1-3, characterized by On the same side of the module housing, the surface of the outer part of the module housing is higher than the surface of the inner part of the module housing. A stop step surface is formed between the two parts, which can stop and cooperate with the front end of the housing in the front-rear direction to realize the insertion and positioning of the splitter module. A notch is provided between the stop step surface and the corresponding side surface of the inner part of the module housing.

7. An optical splitter module, characterized by, The device includes a module housing and at least one optical splitter unit disposed within the module housing. In use, the inner part of the module housing is installed into the housing and connected to the housing via a snap-fit ​​connection structure to make the optical splitter module detachable. The outer part of the module housing is provided with an input interface and an output interface for connecting optical fibers. One optical splitter unit is connected to one input interface and at least two output interfaces.

8. The optical splitter module of claim 7, wherein, The beam splitter module has a sheet-like structure. The input and output interfaces are both located on the front end face of the module housing and are arranged in a straight line. The arrangement direction of the input and output interfaces is perpendicular to the thickness direction of the beam splitter module.

9. The optical splitter module of claim 8, wherein, The input and output interfaces are arranged vertically. The front end face of the module housing has a pull plate for pulling the splitter module out of the housing. The pull plate is located below each input and output interface of the module housing to support the optical fiber during use.

10. The optical splitter module of claim 8 or 9, characterized in that The module housing includes a body with an opening on one side and a cover that covers and is fixed to the opening on one side of the body. The thickness direction of the cover is the same as the thickness direction of the beam splitter module. At least one edge of the cover protrudes from the body and forms a guide protrusion. The guide protrusion is used to guide and cooperate with the corresponding guide groove on the housing during the insertion or removal of the beam splitter module.

11. The optical splitter module of any of claims 7-9, wherein, The back end face of the beam splitter unit has a latching protrusion. The side of the latching protrusion is provided with a snap-fit ​​groove. The snap-fit ​​groove is used to snap into the snap-fit ​​connector in the housing after the beam splitter module is installed in the housing to prevent the beam splitter module from coming out.

12. The optical splitter module of any of claims 7-9, wherein, On the same side of the module housing, the surface of the outer part of the module housing is higher than the surface of the inner part of the module housing. A stop step surface is formed between the two parts, which can stop and cooperate with the front end of the housing in the front-rear direction to realize the insertion and positioning of the splitter module. A notch is provided between the stop step surface and the corresponding side surface of the inner part of the module housing.

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