Optical cable cross-connecting box with multiple barrier structures

Abstract

The invention discloses an optical cable cross-connecting box with a multi-barrier structure, which is applied to the technical field of optical cable cross-connecting boxes, provides a basic mechanical protective barrier through the cooperation of an inner-layer shell, an outer-layer shell and a filling layer, drives a bridging block to intermittently move upwards through a lead screw piece, enables a cooling fan and a blocking plate to move synchronously, and improves the working efficiency of the optical cable cross-connecting box. When the blocking plate stays at the self-cleaning channel for a short time, the suction force in the self-cleaning channel disappears due to the blocking effect, the filter screen piece shakes in a reciprocating mode under the effect of the spring piece, shaken-off dust directly falls to the outer side of the box body, meanwhile, when the blocking plate moves upwards to the area of the tray frame, the electric push rod drives the follow-up frame to push the V-shaped piece, and the dust in the self-cleaning channel disappears. And the vertical distance between the corresponding integrated trays is increased, so that the heat dissipation fan performs enhanced heat dissipation on the expansion area, the interlayer heat dissipation efficiency is improved, and better dustproof heat dissipation protection is provided for the box body.

Description

Technical Field

[0001] This invention relates to the field of optical cable junction box technology, and particularly to an optical cable junction box with a multi-barrier structure. Background Technology

[0002] Fiber optic junction boxes are critical outdoor access devices in fiber optic networks, primarily serving functions such as aggregation, distribution, scheduling, and management. As the connection point between backbone and distribution layer fiber optic cables, they provide users with convenient interfaces for fiber optic testing, switching, and service activation, effectively alleviating pressure on the central office equipment room. During operation, the interior of the junction box requires waterproofing and heat dissipation treatment to provide appropriate barrier protection.

[0003] Application number CN202410043847.1 discloses a high-security communication optical cable junction box. When the hot air inside the communication optical cable junction box is being pumped out during rainy weather, the canopy is lowered to the top of the communication optical cable junction box. The air pumped upward by the cooling fan is discharged through the ventilation holes. The canopy covers the ventilation holes to prevent rainwater from seeping into the communication optical cable junction box.

[0004] The document with application number CN202411112840.7 discloses a layered heat dissipation optical cable junction box. By installing multiple adjustable adjustment columns and adjustment rings, and with the design of rubber clamps, this invention achieves precise heat dissipation control of different areas inside the optical cable junction box. Users can flexibly adjust the heat dissipation of each layer according to actual needs to ensure that the equipment operates at the optimal temperature.

[0005] When the aforementioned optical cable junction box utilizes air cooling to achieve waterproof heat dissipation and thus provide a barrier protection for the box, it neglects the introduction of external dust during heat exchange. This results in dust particles adhering to the end face of the optical fiber connector, which hinders the accurate transmission of optical signals. In addition, even if a filter is installed at the air inlet, if the filter becomes clogged, the air intake will decrease, thereby affecting the heat dissipation effect. To achieve effective dust removal, an additional dust removal structure is required. Therefore, in addition to dust prevention, effective dynamic dust removal is needed to ensure stable heat dissipation. Summary of the Invention

[0006] The core of this invention lies in the use of a V-shaped component, a self-cleaning channel, a lead screw, a bridging block, and an electric actuator to assist in achieving dynamic indirect heat dissipation within the housing, while also facilitating heat dissipation and dynamic dust removal between tray layers. This solves the problems of unstable dynamic dust removal or the need for additional dust removal equipment in existing technologies. Simultaneously, the combination of baffles and sliding frames prevents wastewater backflow and contamination of the inner wall of the self-cleaning channel when rainwater washes the filter, extending the service life of the waterproof and breathable panel.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A fiber optic cable junction box with a multi-barrier structure includes a box body with an internal partition support, the partition support having a T-shaped projection in the vertical direction. The box body includes an outer shell and an inner shell, with a filling layer arranged between the inner and outer shells. Multiple vertically arranged self-cleaning channels are installed through one inner wall of the box body, with both ends of the self-cleaning channels flush with the surfaces of the outer and inner shells, respectively. A lead screw is installed inside the box body, with a T-shaped bridging block threaded onto its surface. The two sides of the bridging block are respectively connected to... The cooling fan and the blocking plate are arranged in close contact with one end of the self-cleaning channel. Multiple tray racks are stacked on top of the partition bracket, and an integrated tray is slidably connected inside each tray rack. V-shaped parts are connected to both sides of each tray rack, and each V-shaped part includes two adjusting plates connected by shafts. A C-shaped linkage plate is connected to the surface of the blocking plate, and a moving frame is connected to the end of the linkage plate. Electric push rods are installed on the surfaces of the moving frame and the blocking plate that are close to each other. The power output end of the electric push rod is connected to a follower frame.

[0009] Furthermore, a filter element is slidably connected inside the self-cleaning channel, and in the initial state, the filter element extends out of the self-cleaning channel. A constraint plate with two built-in vent pipes is fixedly installed on the inner wall of the self-cleaning channel near the inner shell, and a waterproof and breathable plate is installed inside the vent pipe. A string and spring element with the tail end connected to the surface of the filter element are connected to the surface of the constraint plate. A drain pipe with the tail end extending to the surface of the outer shell is installed on the bottom wall of the self-cleaning channel, and the drain pipe is arranged at an angle. The cross-sectional area of ​​the blockage plate is larger than the cross-sectional area of ​​the self-cleaning channel.

[0010] Furthermore, a base is installed at the bottom of the housing, and a drive motor is installed inside the base. The output end of the drive motor is connected to the bottom end of the lead screw via a transmission belt.

[0011] Furthermore, a sensing module is installed on the top of the bridging block, which includes a temperature sensor and a gas sensor. Four guide rods are installed inside the housing. Two of the guide rods are symmetrically arranged about the lead screw on the same side as the lead screw, and the other two guide rods are arranged behind the partition bracket. The bridging block is slidably connected to the surface of the two guide rods.

[0012] Furthermore, the inner shell is made of insulating material, and a discharge pipe extending to the outside of the box is installed through the inside of the inner shell. One-way valves are installed inside the discharge pipe, the vent pipe, and the drain pipe.

[0013] Furthermore, the follower frame is initially located outside the V-shaped component, and the moving frame slides through the surfaces of the other two guide rods.

[0014] Preferably, a precipitation sensor is installed on the outside of the housing, a sliding frame is installed on the outside of the filter screen, a rectangular groove is opened on the top wall of the self-cleaning channel, and a drive motor connected to the precipitation sensor signal is embedded in the inner wall of the rectangular groove. The output end of the drive motor is connected to a round rod, and a baffle with a cross-sectional area located between the cross-sectional areas of the filter screen and the sliding frame is connected to the surface of the round rod.

[0015] Furthermore, the surface of the baffle is coated with an anti-stick coating, and the baffle is in contact with the surface of the filter when it is arranged vertically.

[0016] Compared with the prior art, the advantages of this invention are: (1) This solution uses a screw to drive the bridging block to move up intermittently, so that the cooling fan and the blocking plate move synchronously to achieve dynamic heat dissipation. When the blocking plate briefly stops at the self-cleaning channel, the blocking effect makes the suction force in the self-cleaning channel disappear. The filter screen shakes back and forth under the action of the spring, and the shaken dust falls directly to the outside of the box. At the same time, when the blocking plate moves up to the tray frame area, the electric push rod drives the follower frame to push the V-shaped part, increasing the vertical spacing of the corresponding integrated tray, so that the cooling fan can strengthen the heat dissipation of the expansion area, improve the interlayer heat dissipation efficiency, and provide better dustproof heat dissipation protection for the box.

[0017] (2) When the precipitation sensor detects rainfall, the drive motor switches the baffle from horizontal to vertical and makes it fit against the surface of the filter screen. Rainwater washes the part of the filter screen that extends out of the self-cleaning channel. The wastewater after cleaning is discharged directly to the outside, avoiding pollution of the inner wall of the channel and the waterproof and breathable plate. When the baffle is arranged horizontally, the bottom of the round rod and the baffle forms a sliding contact with the surface of the sliding frame, which will not affect the movement of the filter screen or damage the filter screen's interception. This structure uses natural rainfall to achieve deep cleaning of the filter screen while avoiding internal pollution that may be caused by rain washing, thus extending the service life of the waterproof and breathable plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the drive motor, cooling fan, and lead screw of the present invention; Figure 3 This is a structural schematic diagram of the integrated tray, adjusting plate, lead screw, and linkage plate of the present invention. Figure 4 This is a top view of the integrated tray, adjusting plate, lead screw, and linkage plate of the present invention. Figure 5 This is a cross-sectional view of the integrated tray, adjusting plate, follower frame, lead screw, and linkage plate of the present invention. Figure 6This is a schematic diagram of the cooling fan, bridging block, blocking plate, and sensing module of the present invention. Figure 7 This is a schematic diagram of the internal structure of the inner shell, outer shell, filling layer, and self-cleaning channel of the present invention; Figure 8 This is a schematic diagram of the internal structure of the self-cleaning channel of the present invention; Figure 9 This is a schematic diagram of the dust removal process on the surface of the filter element before and after the clogging plate blocks the self-cleaning channel according to the present invention; Figure 10 This is a schematic diagram of the sliding frame, baffle, and round rod of the present invention; Figure 11 This is a cross-sectional schematic diagram of the sliding frame, baffle, and round rod of the present invention; Figure 12 This is a schematic diagram illustrating the state of the baffle component of the present invention when it is placed vertically to prevent rainwater from washing away the filter screen component.

[0019] Explanation of the labels in the diagram: 1. Housing; 101. Outer shell; 102. Inner shell; 103. Filling layer; 104. Discharge pipe; 2. Base; 3. Lead screw; 4. Cooling fan; 5. Self-cleaning channel; 51. Filter screen; 52. Spring; 53. String rope; 54. Constraint plate; 55. Drain pipe; 511. Sliding frame; 56. Round rod; 57. Baffle; 6. Drive motor; 7. Blocking plate; 8. Bridging block; 9. Linkage plate; 10. Adjustment plate; 11. Integrated tray; 12. Partition bracket; 13. Electric push rod; 14. Follower frame; 15. Guide rod. Detailed Implementation

[0020] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0021] Example 1

[0022] Please see Figures 1-7A fiber optic cable junction box with a multi-barrier structure includes a box body 1 with a partition bracket 12 installed inside, and the vertical projection of the partition bracket 12 is a T-shaped structure. The box body 1 includes an outer shell 101 and an inner shell 102, with a filling layer 103 arranged between the inner shell 102 and the outer shell 101. A plurality of vertically arranged self-cleaning channels 5 are installed through one side of the inner wall of the box body 1, with the two ends of the self-cleaning channels 5 being flush with the surfaces of the outer shell 101 and the inner shell 102, respectively. A lead screw 3 is installed inside the box body 1, and a T-shaped bridging block 8 is threaded onto the surface of the lead screw 3. A cooling fan 4 and a blocking plate 7 are respectively connected to the side surface, and the surface of the blocking plate 7 is in close contact with one end surface of the self-cleaning channel 5. Multiple tray racks are stacked on the top of the partition bracket 12, and an integrated tray 11 is slidably connected inside each tray rack. V-shaped parts are connected to both sides of each tray rack, and each V-shaped part includes two adjusting plates 10 connected by a shaft. A linkage plate 9 with a C-shaped cross section is connected to the surface of the blocking plate 7. A movable frame is connected to the end of the linkage plate 9. Electric push rods 13 are installed on the surfaces of the movable frame and the blocking plate 7 that are close to each other. The power output end of the electric push rod 13 is connected to a follower frame 14.

[0023] Please see Figures 7-8 A filter element 51 is slidably connected inside the self-cleaning channel 5, and in the initial state, the filter element 51 extends out of the self-cleaning channel 5. A constraint plate 54 with two built-in vent pipes is fixedly installed on the inner wall of the self-cleaning channel 5 near the inner shell 102, and a waterproof and breathable plate is installed inside the vent pipe. A string 53 and a spring element 52 with their tail ends connected to the surface of the filter element 51 are connected to the surface of the constraint plate 54. A drain pipe 55 with its tail end extending to the surface of the outer shell 101 is installed on the bottom wall of the self-cleaning channel 5, and the drain pipe 55 is arranged at an angle. The cross-sectional area of ​​the blockage plate 7 is larger than the cross-sectional area of ​​the self-cleaning channel 5.

[0024] Please see Figure 2 The bottom of the housing 1 is equipped with a base 2, and the base 2 is equipped with a drive motor 6. The output end of the drive motor 6 is connected to the bottom end of the lead screw 3 via a transmission belt.

[0025] Please see Figure 3 and Figure 6 A sensing module is installed on the top of the bridging block 8. The sensing module includes a temperature sensor and a gas sensor. Four guide rods 15 are installed inside the housing 1. Two of the guide rods 15 are arranged symmetrically about the lead screw 3 on the same side as the lead screw 3. The other two guide rods 15 are arranged behind the partition bracket 12. The bridging block 8 is slidably connected to the surface of the two guide rods 15.

[0026] Please see Figure 1 and Figure 7The inner shell 102 is made of insulating material. A discharge pipe 104 extending to the outside of the box 1 is installed through the interior of the inner shell 102. One-way valves are installed inside the discharge pipe 104, the vent pipe and the drain pipe 55.

[0027] Please see Figure 3 and Figure 5 In its initial state, the follower frame 14 is located outside the V-shaped part, and the moving frame slides through the surfaces of the other two guide rods 15.

[0028] Specifically, in this application, the outer shell 101 is made of high-strength stainless steel, SMC composite material or galvanized sheet, and its main functions are to prevent ultraviolet rays, impact and malicious damage. The inner shell 102 is made of insulating material, which can prevent safety accidents when the inner optical cable is damaged and causes leakage. The filling layer 103 adopts a foam structure, which can play a buffering role and provide a mechanical protection barrier for the box 1. The surface of the enclosure 1 is equipped with a sealing door. The sealing door and the cable interface of the enclosure 1 are sealed together by sealing strips, providing a waterproof and sealed protective barrier for the enclosure 1. The drive motor 6 is started to drive the lead screw 3 to rotate, causing the bridge block 8 to move up intermittently. That is, the bridge block 8 moves up a certain distance, pauses briefly, and then continues to move up, driving the cooling fan 4 and the blocking plate 7 to move up. As the cooling fan 4 moves up, dynamic heat dissipation is achieved. During the operation of the cooling fan 4, a suction effect is generated, which allows the gas outside the box 1 to enter the box 1 through the filter screen 51 and the vent pipe in sequence, complete the heat exchange, and then be discharged through the discharge pipe 104. During the above process, the blocking plate 7 seals the surface of the self-cleaning channel 5 from bottom to top (the bridging block 8 pauses briefly for 3-10 seconds when it moves to the self-cleaning channel 5 and drives the blocking plate 7 to seal it). The suction at the self-cleaning channel 5 blocked by the blocking plate 7 stops. Therefore, when not blocked, the filter element 51 is driven inward by the suction and squeezes the spring element 52. After the suction stops, the spring element 52 pops outward, causing the filter element 51 to reset. At the same time, the filter element 51 is constrained by the string rope 53, preventing it from being ejected from the self-cleaning channel 5. During the time interval when the filter element 51 stays on the clogging plate 7, it can be reset and shaken under the action of the spring element 52, thereby clearing the blockage on the surface. (To prevent the suspended dust after shaking and cleaning from adhering to the surface of the filter element 51 again, branch pipes can be installed on the surface of the discharge pipe 104. The tail end of each branch pipe is connected to a branch pipe, and the end of the branch pipe extends to the outside of the self-cleaning channel 5. The tail end of the branch pipe is arranged at an angle, which can blow the dust cleaned by shaking further away and appropriately extend the residence time of the clogging plate 7, so as to increase the blowing distance and reduce the possibility of secondary adhesion.) Figure 7As shown in the branch pipe), the water intercepted by the subsequent waterproof and breathable plate accumulates and is discharged into the self-cleaning channel 5 through the drain pipe 55 (in the initial state, part of the filter screen 51 extends into the self-cleaning channel 5, so during the reset cleaning, the dust after shaking and cleaning can fall to the outside of the self-cleaning channel 5), thus providing the housing 1 with a waterproof, heat dissipation, dynamic heat dissipation, and dust removal environmental barrier protection (such as...). Figure 9 (as shown) When the aforementioned blocking plate 7 moves up to the surface of the partition bracket 12 and highly overlaps with the integrated tray 11 (at this time, the height position of the corresponding blocking plate 7 and the cooling fan 4 can be determined by the displacement sensor, and the surfaces of the two follower frames 14 are almost aligned with the tips of the two V-shaped parts to meet the subsequent pushing requirements), during the brief pause of the blocking plate 7 for blocking and clearing, the electric push rod 13 is activated to drive the follower frame 14 closer to the tips of the V-shaped parts, so that the end of the follower frame 14 can push the tips of the two V-shaped parts, allowing the corresponding V-shaped parts to be lifted. The increase in height increases the vertical distance between the two integrated trays 11 corresponding to the effective heat dissipation area of ​​the cooling fan 4 (because multiple trays are stacked in the vertical direction, and the bottom and top of the trays have plug-in blocks and plug-in slots to assist in achieving interlocking and sliding. Even when the vertical distance is increased, a stable interlocking connection can still be maintained, and a small amount of space is reserved when the optical cable is plugged in to prevent the optical cable from breaking when the tray is moved). Also, because the cooling fan 4 is facing the area after the distance is increased, it can provide expanded heat dissipation during a short period of time, enhancing the interlayer heat dissipation effect of the trays.

[0029] Because the partition bracket 12 is a T-shaped design, the follower frame 14 and the movable frame are located between the partition bracket 12 and the inner wall of the box 1. The two will not be affected by the partition bracket 12 when they move up and down.

[0030] In addition, when the clogging on the surface of the filter element 51 is not severe, the clogging plate 7 may not be based on the arrangement trajectory of the self-cleaning channel 5, but rather on the heat dissipation requirements of the integrated tray 11.

[0031] Example 2

[0032] Please see Figures 10-12 A precipitation sensor is installed on the outside of the housing 1. A sliding frame 511 is installed on the outside of the filter screen 51. A rectangular through groove is opened on the top wall of the self-cleaning channel 5. A drive motor connected to the precipitation sensor signal is embedded in the inner wall of the rectangular through groove. A round rod 56 is connected to the output end of the drive motor. A baffle 57 with a cross-sectional area between the filter screen 51 and the sliding frame 511 is connected to the surface of the round rod 56.

[0033] The surface of the baffle 57 is coated with an anti-stick coating, and the baffle 57 is in contact with the surface of the filter screen 51 when it is arranged vertically.

[0034] In Embodiment 1, the shaking cleaning performed by blocking the self-cleaning channel 5 for a short period of time using the blocking plate 7 can effectively clean dry dust, but the actual cleaning effect is limited. Therefore, this embodiment is adopted for improvement. In this embodiment, the string 53 and the spring 52 are located on both sides of the baffle 57, and their ends are connected to the surface of the sliding frame 511.

[0035] Rainfall is detected outside the housing 1 by a precipitation sensor. At this time, the internal heat dissipation demand of the housing 1 is reduced, or during heat dissipation, intermittent blocking operation is used to keep part of the filter screen 51 protruding from the self-cleaning channel 5. Rainwater is used to clean and rinse the protruding part, so as to achieve a more thorough cleaning of the filter screen 51. In real life, rain is usually accompanied by wind. Therefore, rainwater will fall on the surface of the housing 1 and the filter 51. Although it can also achieve a cleaning effect, the wastewater after cleaning and rinsing will flow through the inner wall of the self-cleaning channel 5 and then be discharged through the drain pipe 55. The dust carried in the wastewater will remain on the inner wall of the self-cleaning channel 5 after drying. Then, during the heat dissipation process, it will be transferred to the surface of the waterproof and breathable plate, causing the waterproof and breathable plate to fail.

[0036] To address this issue, the drive motor can be activated during rainfall to switch the horizontally arranged baffle 57 to a vertical position. This provides protection for the filter screen 51 in its initial state. Since the string 53 and spring 52 are located on both sides of the baffle 57, they are not disturbed during its switching motion. Furthermore, after being vertically arranged, the baffle 57 adheres to the surface of the filter screen 51, providing complete coverage. This allows the wastewater from subsequent rainwater washing to flow back through the filter screen 51 into the self-cleaning channel 5, preventing contamination of the inner wall of the self-cleaning channel 5 (e.g., ...). Figure 12 (As shown).

[0037] In addition, when the baffle 57 is placed horizontally, the filter screen 51 and the sliding frame 511 on the surface are both in contact with the bottom of the baffle 57, so they can not only play a corresponding blocking and interception role, but also will not interfere with its sliding under suction.

[0038] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A fiber optic cable junction box with a multi-barrier structure, comprising a box body (1) with a partition bracket (12) installed inside, wherein the projection of the partition bracket (12) in the vertical direction is a T-shaped structure, characterized in that: The housing (1) includes an outer shell (101) and an inner shell (102). A filling layer (103) is arranged between the inner shell (102) and the outer shell (101). A plurality of self-cleaning channels (5) arranged vertically are installed through one side of the inner wall of the housing (1). The two ends of the self-cleaning channels (5) are flush with the surfaces of the outer shell (101) and the inner shell (102), respectively. A lead screw (3) is installed inside the housing (1). A T-shaped bridging block (8) is threaded onto the surface of the lead screw (3). A cooling fan (4) and a blocking plate (7) are connected to the two sides of the bridging block (8), respectively. The surface of the plate (7) is in contact with one end of the self-cleaning channel (5). Multiple tray frames are stacked on top of the partition bracket (12), and an integrated tray (11) is slidably connected inside each tray frame. V-shaped parts are connected to both sides of each tray frame, and each V-shaped part includes two adjusting plates (10) connected by shafts. A linkage plate (9) with a C-shaped cross section is connected to the surface of the blocking plate (7). A moving frame is connected to the end of the linkage plate (9). Electric push rods (13) are installed on the surfaces of the moving frame and the blocking plate (7) that are close to each other. A follower frame (14) is connected to the power output end of the electric push rod (13).

2. The optical cable junction box with a multi-barrier structure according to claim 1, characterized in that: The self-cleaning channel (5) is slidably connected to a filter screen (51), and in the initial state, the filter screen (51) extends out of the self-cleaning channel (5). The inner wall of the self-cleaning channel (5) near the inner shell (102) is fixedly installed with a constraint plate (54) containing two vent pipes, and a waterproof and breathable plate is installed inside the vent pipe. The surface of the constraint plate (54) is connected with a string (53) and a spring (52) whose tail ends are connected to the surface of the filter screen (51). The bottom wall of the self-cleaning channel (5) is installed with a drain pipe (55) whose tail ends extend to the surface of the outer shell (101), and the drain pipe (55) is arranged at an inclination. The cross-sectional area of ​​the blockage plate (7) is larger than the cross-sectional area of ​​the self-cleaning channel (5).

3. The optical cable junction box with a multi-barrier structure according to claim 1, characterized in that: The bottom of the housing (1) is equipped with a base (2), and a drive motor (6) is installed inside the base (2). The output end of the drive motor (6) is connected to the bottom end of the lead screw (3) via a transmission belt.

4. The optical cable junction box with a multi-barrier structure according to claim 1, characterized in that: The top of the bridging block (8) is equipped with a sensing and detection module, which includes a temperature sensor and a gas sensor. The inside of the housing (1) is equipped with four guide rods (15), two of which are on the same side as the lead screw (3) and are symmetrically arranged about the lead screw (3). The other two guide rods (15) are arranged behind the partition bracket (12). The bridging block (8) is slidably connected to the surface of the two guide rods (15).

5. The optical cable junction box with a multi-barrier structure according to claim 2, characterized in that: The inner shell (102) is made of insulating material. A discharge pipe (104) extending to the outside of the box (1) is installed through the interior of the inner shell (102). One-way valves are installed inside the discharge pipe (104), the vent pipe and the drain pipe (55).

6. The optical cable junction box with a multi-barrier structure according to claim 4, characterized in that: The follower frame (14) is located on the outside of the V-shaped member in the initial state, and the moving frame slides through the surface of the other two guide rods (15).

7. The optical cable junction box with a multi-barrier structure according to claim 1, characterized in that: A precipitation sensor is installed on the outside of the housing (1), a sliding frame (511) is installed on the outside of the filter (51), a rectangular through groove is opened on the top wall of the self-cleaning channel (5), and a drive motor connected to the precipitation sensor signal is embedded in the inner wall of the rectangular through groove. A round rod (56) is connected to the output end of the drive motor, and a baffle (57) with a cross-sectional area between the filter (51) and the sliding frame (511) is connected to the surface of the round rod (56).

8. The optical cable junction box with a multi-barrier structure according to claim 7, characterized in that: The surface of the baffle (57) is coated with an anti-stick coating, and the baffle (57) is in contact with the surface of the filter (51) when arranged vertically.

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