Optical fiber windproof structure of QKD case

Abstract

The utility model discloses an optical fiber windproof structure of a QKD cabinet. The optical fiber windproof structure comprises a cabinet body, an optical fiber wire box and an optical fiber adapter. The optical fiber wire box comprises a box body and a box cover. The box body is fixedly arranged in the box body, the optical fiber adapter is detachably connected with the box body, the box cover is detachably connected with the box body, and the windward side of the box cover is provided with a chamfered surface. The utility model discloses an optical fiber windproof structure of a QKD case, which is characterized in that optical fiber cables can complete wiring in an optical fiber cable box and can be connected with optical fiber adapters, the optical fiber cables are prevented from being exposed in a windy environment, and meanwhile, a chamfered surface is arranged on a windward surface of a box cover to guide airflow, so that the optical fiber cables are effectively prevented from being influenced by wind power to generate position fluctuation, and the service life of the optical fiber cables is prolonged. The optical fiber transmission stability is improved, the structure is simple, and the assembly is convenient.

Description

Technical Field

[0001] This utility model relates to the field of QKD equipment, specifically to a fiber optic windproof structure for a QKD chassis. Background Technology

[0002] Quantum Key Distribution (QKD) is a core technology in quantum communication and quantum network research. QKD primarily uses extremely weak quantum entanglement sources, making it susceptible to external influences that introduce system noise. Currently, most QKD enclosures use exposed fiber optic cables, relying solely on the fiber's cladding for insulation. While the cladding provides tensile strength, dust protection, and light insulation, its thermal insulation performance is less than ideal. Furthermore, in windy environments, such as QKD enclosures with fans, the fiber optic cables experience positional fluctuations due to wind force. These fluctuations vary with airflow, leading to instability in optical information and inconsistent accuracy.

[0003] In addition, the existing QKD chassis / rack cabling methods generally use various methods such as cable conduits, cable clips, and clips to fix and run cables. This type of cable conduit cabling is relatively cumbersome during maintenance and disassembly, especially when it is necessary to replace a certain cable, which requires disassembling the conduit to replace it, which is time-consuming and laborious. Utility Model Content

[0004] To address the problem of fiber optic cables inside existing QKD chassis experiencing positional fluctuations due to wind, this invention proposes a windproof fiber optic structure for QKD chassis.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A fiber optic windproof structure for a QKD chassis includes a chassis, a fiber optic junction box, and a fiber optic adapter; the fiber optic junction box includes a box body and a box cover;

[0007] The box body is fixedly installed inside the enclosure. The fiber optic adapter is detachably connected to the box body. The box cover is detachably connected to the box body. The windward side of the box cover is provided with a chamfered surface.

[0008] In the above solution, the fiber optic cable can be routed and connected to the fiber optic adapter in the fiber optic box, avoiding exposure to windy environments. At the same time, the windward side of the box cover is chamfered to guide airflow, thereby effectively preventing the fiber optic cable from fluctuating due to wind force, improving the stability of fiber optic transmission, and the structure is simple and easy to assemble.

[0009] Preferably, the box is provided with a cable fixing buckle.

[0010] In the above solution, the fiber optic cable is secured using a cable fixing clip.

[0011] Preferably, the fiber optic cable box is an injection-molded structure.

[0012] Preferably, the fiber optic cable box is a high-temperature resistant injection molded part.

[0013] Preferably, the fiber optic box is a sheet metal structure.

[0014] Preferably, the outer surfaces of both the box body and the lid are covered with a heat insulation layer.

[0015] In the above solution, the heat generated by other components inside the QKD chassis during operation is effectively blocked by the heat insulation layer, thereby improving the heat insulation effect.

[0016] Preferably, the chamfered surface is a right-angled surface.

[0017] Preferably, the inclination angle of the chamfered surface is 45° to 60°.

[0018] Preferably, the chamfered surface has an inclination angle of 45°.

[0019] The beneficial technical effects of this utility model are:

[0020] This utility model provides a fiber optic windproof structure for a QKD chassis. The fiber optic cable can be routed and connected to the fiber optic adapter in the fiber optic box, avoiding exposure to windy environments. At the same time, a chamfered surface is set on the windward side of the box cover to guide airflow, thereby effectively preventing the fiber optic cable from being affected by wind and causing position fluctuations, improving the stability of fiber optic transmission. Moreover, the structure is simple and easy to assemble. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the optical fiber box in its closed state in this utility model;

[0022] Figure 2 This is a schematic diagram of the fiber optic cable box in the open state in this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the box cover in this utility model;

[0024] Figure 4 This is a schematic diagram of the air duct routing of this utility model;

[0025] The components include: 1. Cabinet; 2. Fiber optic cable box; 21. Box body; 22. Box cover; 23. Cable fixing buckle; 24. Tightening screw; 3. Fiber optic adapter; 4. Optical tray; 5. Fan assembly. Detailed Implementation

[0026] To make the objectives, technical solutions and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments. However, the scope of protection of this utility model is not limited to the specific embodiments described below.

[0027] Example 1

[0028] like Figure 1 As shown, a fiber optic windproof structure for a QKD chassis includes a chassis 1, a fiber optic cable box 2, and a fiber optic adapter 3; the fiber optic cable box 2 includes a box body 21 and a box cover 22.

[0029] The box body 21 is fixedly installed inside the box body 1. The fiber optic adapter 3 is detachably connected to the box body 21. The box cover 22 is detachably connected to the box body 21. The windward side of the box cover 22 is provided with a chamfered surface.

[0030] In practical implementation, the fiber optic cable can be routed and connected to the fiber optic adapter 3 in the fiber optic box 2, avoiding exposure to windy environments. At the same time, a chamfered surface is set on the windward side of the box cover 22 to guide airflow, thereby effectively preventing the fiber optic cable from being affected by wind and causing position fluctuations, improving the stability of fiber optic transmission. Moreover, the structure is simple and easy to assemble.

[0031] More specifically, a cable fixing buckle 23 is provided inside the box body 21.

[0032] In the specific implementation process, the fiber optic cable is fixed and the fiber optic cable routing is straightened by the cable fixing buckle 23.

[0033] More specifically, the fiber optic box 2 is an injection-molded structure.

[0034] More specifically, the fiber optic box 2 is a high-temperature resistant injection molded part.

[0035] In the specific implementation process, when each optical tray 4 is installed into the housing 1, the installation direction of the optical tray 4 is positioned by the positioning guide pin to ensure the mating accuracy of each socket. The fiber optic adapter 3 on the PCBA board of the optical tray 4 can be smoothly inserted and matched with the reserved opening of the housing 21. After each fiber optic adapter 3 is matched with the reserved opening of the housing 21, the head of the fiber optic adapter 3 will protrude inside the housing 21. The housing 21 is fixed to the back plate with pan head Phillips screws. Then, the fiber optic cable is wrapped around several times and fastened with cable fixing clips 23, and fixed to the housing 21 with pan head Phillips screws. Then, the fiber optic cable is connected to the fiber optic adapter 3 on the PCBA board of the optical tray 4. The fiber optic cable can be interconnected in multiple groups, not limited to 2 groups or 4 groups. After the fiber optic cable is connected, the housing cover 22 is closed. The housing 21 has reserved fixing studs that cooperate with the housing cover 22 for fixation, and is tightened by tightening the hand screws 24.

[0036] When the diameter of the fiber optic cable loop is large or the fiber diameter is small, the fiber optic cable is easily affected by wind, causing it to wobble and move slightly, even without the cable fixing clip 23. Therefore, a cover 22 is needed to prevent wind from blowing into the fiber optic cable box 2. The box body 21 and the cover 22 fit tightly together, effectively blocking the air blown out by the fan assembly 5 in the QKD chassis. If the air generated by the fan assembly 5 enters from left and exits from right, the left side (windward side) of the cover 22 has a chamfered surface to effectively guide the airflow. Considering heat insulation, the fiber optic cable box 2 adopts a high-temperature resistant engineering plastic structure or a composite plastic component structure with glass fiber.

[0037] Example 2

[0038] This embodiment provides a fiber optic windproof structure for a QKD chassis, which is basically the same as the fiber optic windproof structure for a QKD chassis described in Embodiment 1. The difference is that in this embodiment, the fiber optic box 2 is a sheet metal structure.

[0039] More specifically, the outer surfaces of both the box body 21 and the lid 22 are covered with a heat insulation layer.

[0040] In practice, the insulation layer effectively blocks the heat generated by other components inside the QKD chassis during operation, thereby improving the insulation effect.

[0041] In the specific implementation process, the gap between the reserved opening of the box 21 and the fiber optic adapter on the optical tray 4PCBA board is reserved at about 0.5mm. It should not be too large or too small. If the gap is too large, air can easily enter. If the gap is too small, poor processing accuracy of the sheet metal parts can easily lead to assembly interference or difficulty in assembly.

[0042] The surfaces of the box body 21 and the box cover 22 are sprayed with heat-insulating paint, which can effectively block the heat generated by the internal components of the QKD chassis during operation. The box body 21 and the box cover 22 can be sheet metal or other metal structures, and the surface is covered with a heat-insulating layer (such as sprayed heat-insulating paint).

[0043] Example 3

[0044] This embodiment provides a fiber optic windproof structure for a QKD chassis, which is basically the same as the fiber optic windproof structure for a QKD chassis described in Embodiment 1 or Embodiment 2, except that: in this embodiment, the chamfered surface is a right-angled chamfered surface.

[0045] More specifically, the chamfered surface has an inclination angle of 45° to 60°.

[0046] More specifically, the chamfered surface has an inclination angle of 45°.

[0047] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are for convenience only and do not constitute any limitation on this utility model.

Claims

1. A fiber optic windproof structure for a QKD chassis, characterized in that, It includes a housing (1), an optical fiber box (2), and an optical fiber adapter (3); the optical fiber box (2) includes a box body (21) and a box cover (22); The box body (21) is fixedly installed inside the box body (1). The fiber optic adapter (3) is detachably connected to the box body (21). The box cover (22) is detachably connected to the box body (21). The windward side of the box cover (22) is provided with a chamfered surface.

2. The fiber optic windproof structure of a QKD chassis according to claim 1, characterized in that, The box (21) is equipped with a cable fixing buckle (23).

3. The fiber optic windproof structure of a QKD chassis according to claim 1, characterized in that, The fiber optic box (2) is an injection-molded structure.

4. The fiber optic windproof structure of a QKD chassis according to claim 3, characterized in that, The fiber optic box (2) is a high-temperature resistant injection molded part.

5. The fiber optic windproof structure of a QKD chassis according to claim 1, characterized in that, The fiber optic box (2) is a sheet metal structure.

6. The fiber optic windproof structure of a QKD chassis according to claim 5, characterized in that, The outer surfaces of the box body (21) and the box cover (22) are both covered with a heat insulation layer.

7. The fiber optic windproof structure of a QKD chassis according to claim 1, characterized in that, The chamfered surface is a right-angled surface.

8. The fiber optic windproof structure of a QKD chassis according to claim 1 or 7, characterized in that, The chamfered surface has an inclination angle of 45° to 60°.

9. The fiber optic windproof structure of a QKD chassis according to claim 8, characterized in that, The chamfered surface has an inclination angle of 45°.

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