A lightning protection grounding box for communication machine room and station optical cable

Abstract

The utility model relates to a lightning protection grounding box for communication machine room and station optical cable, including box and box cover, the both sides of box wall of box are equipped with middle side plate and upper side plate, the middle side plate includes the first side plug connecting part of both ends and middle upper cable seat and middle lower cable seat, the second side plug connecting part of upper side plate and the first side plug connecting part of middle side plate are installed in the box side connecting part of box wall opening and are sealed through side sealing strip, middle lower cable seat is sealedly connected with lower cable seat, each lower middle semicircular groove hole and corresponding lower semicircular groove hole are spliced and form respective lower optical cable hole, upper cable seat is sealedly connected with middle upper cable seat, each upper semicircular groove hole and corresponding upper middle semicircular groove hole are spliced and form respective upper optical cable hole, and the upper optical cable hole and lower optical cable hole are equipped with sealing ring. The utility model is compact in structure, and construction is flexible, and convenient operation, can improve the protection level under the premise that realizes the optical cable opening and peeling fixed operation of all lines in the machine room.

Description

Technical Field

[0001] This utility model relates to a lightning protection grounding box for optical cables in communication equipment rooms and stations, belonging to the field of lightning protection grounding technology for communication equipment rooms and stations. Background Technology

[0002] In optical fiber systems, communication equipment rooms and stations typically employ cables with a metal reinforcing core. This core provides sufficient mechanical strength and stable physical properties, ensuring the cable offers some protection against external influences under natural conditions. Grounding the cable core is crucial for protecting the system and terminal equipment from lightning strikes and electrostatic discharge. Typically, incoming optical cables first enter the equipment room's cabinets. After stripping the cable, the metal reinforcing core is connected to a dedicated integrated grounding clamp on the ODF rack, secured by crimping. While this grounding method is simple and cost-effective, it suffers from unreliable electrical isolation. Lightning current can travel along the metal reinforcing core into the equipment room, potentially damaging equipment. Another method involves disconnecting and grounding the optical cable's metal reinforcing core at the lightning protection grounding metal enclosure. This enclosure has optical cable entry and exit holes, secured with clamps. This type of lightning protection grounding enclosure has poor sealing, and in salt spray environments such as coastal areas, electrolytic corrosion increases the risk of casing perforation by three times. Furthermore, this enclosure structure allows for a limited number of optical cables, making it unsuitable for communication equipment rooms and station optical cable grounding boxes. Summary of the Invention

[0003] The purpose of this utility model is to provide a lightning protection grounding box for communication equipment rooms and station optical cables that is compact in structure, flexible in construction, and easy to operate, and can improve the protection level while realizing the stripping and fixing of optical cables for all lines in the equipment room.

[0004] The technical solution of this utility model to achieve the above-mentioned objective is: a lightning protection grounding box for optical cables in communication equipment rooms and local stations, characterized in that: it includes a box body and a box cover installed on the box body by fasteners, and an upper sealing ring is provided at the junction of the box cover and the box body;

[0005] The enclosure has a detachable middle side panel and an upper side panel on both sides of the enclosure wall for optical cables to pass through.

[0006] The enclosure has openings on the cable inlet and cable outlet sides of the enclosure wall. The two ends of the openings are provided with enclosure side connecting parts, and the bottom is provided with a lower cable seat. The lower cable seat has multiple outwardly protruding lower semi-circular slots and lower connecting seats on both sides of the semi-circular slots.

[0007] The intermediate side plate includes first side insertion connecting parts at both ends, an upper intermediate cable seat at the top, and a lower intermediate cable seat at the bottom. The upper intermediate cable seat has multiple outwardly extending upper intermediate semi-circular slots and upper intermediate connecting seats on both sides of the upper intermediate semi-circular slots. The lower intermediate cable seat has multiple outwardly extending lower intermediate semi-circular slots and lower intermediate connecting seats on both sides of the lower intermediate semi-circular slots. The first side insertion connecting parts of the intermediate side plate are installed at the box side connecting parts of the box wall opening and sealed by side sealing strips. The lower intermediate connecting seats of the lower intermediate cable seat are connected to the lower connecting seats of the lower cable seat by fasteners. Each lower intermediate semi-circular slot is spliced ​​with the corresponding lower semi-circular slot to form its own lower optical cable channel. A sealing ring is provided in the lower optical cable channel. Multiple lower sealing strips are provided from the inside to the outside at the connection between the lower intermediate cable seat and the lower cable seat.

[0008] The upper side plate includes second side insertion connecting parts at both ends and an upper cable seat at the bottom. The upper cable seat is provided with multiple outwardly protruding upper semi-circular slots and upper connecting seats on both sides of the upper semi-circular slots. The second side insertion connecting parts of the upper side plate are installed on the box side connecting parts of the box wall opening and sealed by side sealing strips. The upper connecting seats of the upper cable seat are connected to the upper middle connecting seats of the middle upper cable seat by fasteners. Each upper semi-circular slot and the corresponding upper middle semi-circular slot are spliced ​​to form their respective upper optical cable channels, and a sealing ring is provided in the upper optical cable channel. Multiple intermediate sealing strips are provided from the inside to the outside at the junction of the upper cable seat and the middle lower cable seat.

[0009] This utility model employs detachable middle and upper side panels. The middle and upper side panels are multi-layered and sealed at the opening of the enclosure wall, with a sealed connection between the middle and upper side panels. Multiple upper semi-circular slots on the upper side panel are spliced ​​with corresponding upper middle semi-circular slots on the middle side panel to form upper optical cable channels. Simultaneously, each lower middle semi-circular slot on the middle side panel is spliced ​​with corresponding lower semi-circular slots on the lower cable base to form lower optical cable channels. Construction is simple and convenient. Sealing rings are provided within both the upper and lower optical cable channels. Multiple lower sealing strips are provided from the inside out at the connection between the middle lower cable base and the lower cable base. Multiple middle sealing strips are also provided from the inside out at the connection between the upper cable base and the middle lower cable base. This enables the stripping and fixing of optical cables for all lines within the equipment room. After connection, the enclosure has a good sealing effect, reliably protecting the stripped optical cables from dust and water, thus improving their operational reliability. This utility model adopts a combined upper and lower optical cable channel structure to meet the requirements of splicing construction in multiple scenarios. It strips and cuts the middle part of the metal reinforcing core of the optical cable entering the equipment room or station, and fixes the metal reinforcing core to the ground, so as to achieve electrical insulation of the optical cable before entering the equipment room or station. It solves the safety hazards without damaging the original line, reduces the construction difficulty and requirements, and can simultaneously meet the requirements of optical cable stripping for all lines in the equipment room. Under the premise of meeting the requirements of optical cable use, it is not only suitable for building new stations, but also for modifying the existing lines in the existing equipment room, which effectively solves the safety hazards of the existing optical cable. Attached Figure Description

[0010] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0011] Figure 1 This is a structural schematic diagram of the lightning protection grounding box for communication equipment rooms and station optical cables of this utility model.

[0012] Figure 2 This is a structural diagram of the lightning protection grounding box of this utility model after the box cover has been removed.

[0013] Figure 3 yes Figure 2 A magnified structural diagram at point I.

[0014] Figure 4 yes Figure 2 Enlarged structural diagram at point II.

[0015] Figure 5 This is a schematic diagram of the structure of the lightning protection grounding box of this utility model, in which an optical cable fixed grounding device is installed.

[0016] Wherein: 1—Casing cover, 1-1—Heat dissipation fins, 2—Casing body, 2-1—Casing wall, 2-2—Casing wall opening, 2-21—Lower cable seat, 2-21-1—Lower connecting seat, 2-21-2—Lower insert plate, 2-21-3—Lower slot, 2-22—Casing side connection part, 2-3—Inner connecting seat, 2-4—Casing bottom plate, 2-5—Sealing groove, 3—Sealing ring, 4—Middle side plate, 4-1—Middle upper cable seat, 4-11—Upper middle connecting seat, 4-12—Middle Upper slot, 4-2—Middle lower cable seat, 4-21—Lower middle connecting seat, 4-22—Middle lower slot, 4-23—Middle lower insert plate, 4-3—First side insert connecting part, 4-4—Middle mounting seat, 5—Upper side plate, 5-1—Upper cable seat, 5-2—Upper groove, 5-3—Upper connecting seat, 5-4—Second side insert connecting part, 5-5—Upper insert plate, 5-6—Upper mounting seat, 6—Upper optical cable channel, 7—Lower optical cable channel, 8—Optical cable fixing grounding device. Detailed Implementation

[0017] See Figures 1-4 As shown, this utility model provides a lightning protection grounding box for optical cables in communication equipment rooms and stations, including a box body 2 and a box cover 1 installed on the box body 2 by fasteners. The box cover 1 is provided with an upper sealing ring at the joint between it and the box body 2, and the box cover 1 is installed on the box body 2 by fasteners.

[0018] See Figures 1-4 As shown, the enclosure 2 of this utility model has detachable middle side plates 4 and upper side plates 5 on both sides of the enclosure wall 2-1 for optical cables to pass through. The bottom plate 2-4 has mounting holes, allowing for indoor, outdoor, and cable tray installation. The enclosure 2, cover 1, middle side plates 4, and upper side plates 5 are made of corrosion-resistant metal. The detachable middle side plates 4 and upper side plates 5 allow for a tap-and-go construction method. A grounding post is provided on the inner side of the enclosure wall 2-1, ensuring reliable grounding. See [link / reference]. Figure 5 As shown, all optical cables entering the equipment room and station can be partially stripped and cut by about 30cm in the middle. The metal reinforcing core at the cut point is then fixed and installed on the optical cable grounding device 8. The metal reinforcing core is connected to the grounding busbar through a grounding wire. The metal reinforcing core that will be energized before entering the equipment room is grounded, achieving electrical insulation of the optical cable before it enters the equipment room and station. This does not damage the strength of the optical cable and greatly reduces the difficulty and requirements of construction. In particular, the optical cable can be laid in multiple layers inside the box 2, which greatly improves the flexibility of construction. It can not only solve the safety hazards of existing optical cables, but also adapt to the construction of new stations.

[0019] See Figures 1-4The housing 2 of this utility model has openings 2-2 on the cable inlet and cable outlet sides of the housing wall 2-1. The two ends of the openings 2-2 are provided with side connection parts 2-22 and the bottom is provided with a lower cable seat 2-21. The lower cable seat 2-21 has multiple outwardly protruding lower semi-circular slots and lower connecting seats 2-21-1 on both sides of the semi-circular slots. The middle side plate 4 is sealed and installed at the opening 2-2 of the housing wall, so that the lower cable seat 2-21 and the middle lower cable seat 4-2 on the middle side plate 4 form the entry and exit channel of the lower optical cable.

[0020] See Figures 1-4 The intermediate side plate 4 of this utility model includes first side insertion connecting parts 4-3 at both ends, an upper intermediate cable seat 4-1 at the top, and a lower intermediate cable seat 4-2 at the bottom. The upper intermediate cable seat 4-1 has multiple outwardly extending upper intermediate semi-circular slots and upper intermediate connecting seats 4-11 on both sides of the upper intermediate semi-circular slots. The lower intermediate cable seat 4-2 has multiple outwardly extending lower intermediate semi-circular slots and lower intermediate connecting seats 4-21 on both sides of the lower intermediate semi-circular slots. The first side insertion connecting parts 4-3 of the intermediate side plate 4 are installed at the box side connecting part 2-22 of the box wall opening 2-2 and sealed by a side sealing strip. Therefore, by sealing the intermediate side plate 4 at the box side connecting part 2-22 of the box wall opening 2-2, the box body 2 has better dustproof and waterproof effects. See Figures 1-4 The lower intermediate connecting seat 4-21 of the intermediate lower cable seat 4-2 of this utility model is connected to the lower connecting seat 2-21-1 of the lower cable seat 2-21 by fasteners. Each lower intermediate semi-circular slot is spliced ​​with the corresponding lower semi-circular slot to form its own lower optical cable channel 7. A sealing ring 3 is provided in the lower optical cable channel 7 to seal the optical cable passing through. Multiple lower sealing strips are provided from the inside to the outside at the connection between the intermediate lower cable seat 4-2 and the lower cable seat 2-21, which facilitates construction and has a good dustproof and waterproof effect.

[0021] See Figures 1-4 The upper side plate 5 of this utility model includes second side insertion connecting parts 5-4 at both ends and an upper cable seat 5-1 at the bottom. The upper cable seat 5-1 is provided with multiple outwardly protruding upper semi-circular slots and upper connecting seats 5-3 on both sides of the upper semi-circular slots. The second side insertion connecting parts 5-4 of the upper side plate 5 are installed on the box side connecting parts 2-22 of the box wall opening 2-2 and sealed by a side sealing strip, thus sealing the upper side plate 5 on the box side connecting parts 2-22 of the box wall opening 2-2. The upper connecting parts of the upper cable seat 5-1 are... The seat 5-3 is connected to the upper middle connecting seat 4-11 of the middle upper cable seat 4-1 by fasteners. Each upper semi-circular slot and the corresponding upper middle semi-circular slot are spliced ​​to form their own upper optical cable channel 6. The upper optical cable channel 6 is provided with a sealing ring 3 to seal the optical cable passing through. Multiple intermediate sealing strips are provided from the inside to the outside at the junction of the upper cable seat 5-1 and the middle lower cable seat 4-2. This facilitates on-site construction and gives the box a good dustproof and waterproof effect.

[0022] See Figures 2-4 As shown, the sealing rings 3 inside the upper optical cable channel 6 and the lower optical cable channel 7 of this utility model are composed of multiple stacked sleeves with different diameters. Each sleeve is a semi-circle with a different diameter and an opening in the middle, and is made of TM rubber. Since the rubber sealing ring group can form a variable diameter structure by removing the inner small diameter sealing sleeve, it can reliably seal optical cables of different diameters. The inner diameter of the convenient rubber sealing ring group is easy to adjust, which can meet the sealing requirements of all optical cables in the current network. It is simple and convenient to operate, has a wide range of applications, and provides reliable protection against dust and water for the stripped optical cable, especially improving its working reliability in salt spray environments.

[0023] See Figures 2-4 As shown, the first side insertion connecting part 4-3 of the upper side plate 5 and the second side insertion connecting part 5-4 of the middle side plate 4 are matched with the box side connecting part 2-22 of the box wall opening 2-2 as side protrusion and concave connecting parts, and the side sealing strip is provided in the side protrusion and concave connecting parts. Figures 3-5 As shown, in this utility model, the box wall opening 2-2 has a connecting groove on the box side at the box side connecting part 2-22, while the first side insertion connecting part 4-3 of the upper side plate 5 and the second side insertion connecting part 5-4 of the middle side plate 4 are outwardly protruding connecting plates. The side sealing strip is set in the connecting groove, and the connecting plates at both ends of the upper side plate 5 and the middle side plate 4 are set in the connecting groove of the box wall opening 2-2, realizing a sealed connection between the upper side plate 5 and the middle side plate 4. Alternatively, this utility model may have connecting grooves at both ends of the upper side plate 5 and the middle side plate 4, with the side sealing strip set in the connecting groove, and the box side connecting part 2-22 of the box wall opening 2-2 being an outwardly protruding connecting plate, which connects with the connecting groove of the upper side plate 5 and the middle side plate 4.

[0024] See Figures 2-4 As shown, the upper connecting seat 5-3 of the upper cable seat 5-1 and the upper intermediate connecting seat 4-11 of the intermediate upper cable seat 4-1 of this utility model are provided with multiple matching upper convex and concave connecting parts from the inside to the outside, and the intermediate sealing strip is provided on each corresponding upper convex and concave connecting part. See Figure 3 , 4 As shown, the lower part of the upper connecting seat 5-3 of the upper cable seat 5-1 of this utility model is provided with multiple upper insert plates 5-5 from the inside out, while the upper intermediate connecting seat 4-11 is provided with multiple intermediate upper slots 4-12 from the inside out. The intermediate sealing strip is set in the intermediate upper slot 4-12, and the multiple upper insert plates 5-5 on the upper cable seat 5-1 are installed in the corresponding intermediate upper slots 4-12. This utility model can also provide multiple upper slots from the inside out at the lower part of the upper connecting seat 5-3 of the upper cable seat 5-1, and multiple intermediate upper insert plates from the inside out at the upper intermediate connecting seat 4-11, with the intermediate sealing strip set in the upper slot. Each intermediate upper insert plate is installed in the corresponding upper slot to achieve a labyrinth seal at the connection point and improve the waterproof and dustproof effect.

[0025] See Figures 2-4 As shown, the lower connecting seat 2-21-1 of the lower cable seat 2-21 and the lower intermediate connecting seat 4-21 of the intermediate lower cable seat 4-2 are provided with multiple matching lower convex and concave connecting parts from the inside to the outside, and the lower sealing strip is provided on the corresponding lower convex and concave connecting parts. See Figures 2-4 As shown, the lower cable seat 2-21 of this utility model has a lower slot 2-21-3 on the inner side of the lower connecting seat 2-21-1, and a lower insert plate 2-21-2 in the middle and on the outer side. The middle lower cable seat 4-2 has a middle lower insert plate 4-23 on the inner side of the lower middle connecting seat 4-21, and a middle lower slot 4-22 on the outer side of the middle. The lower sealing strip is set in the lower slot 2-21-3 and the middle lower slot 4-22. The middle lower insert plate 4-23 is set in the lower slot 2-21-3, and the lower insert plate 2-21-2 is set in the middle lower slot 4-22. This utility model can also be configured such that the lower cable seat 2-21 has a lower slot 2-21-3 on both the lower connecting seat 2-21-1 and the middle lower cable seat 4-2 has a corresponding middle lower insert plate 4-23 on the lower middle connecting seat 4-21, or the lower cable seat 2-21 has a lower insert plate 2-21-2 on both the lower connecting seat 2-21-1 and the middle lower cable seat 4-2 has a corresponding middle lower slot 4-22 on the lower middle connecting seat 4-21. The lower sealing strip is set in the lower slot 2-21-3 and the middle lower slot 4-22 to achieve a labyrinth seal at the connection point, further improving the waterproof and dustproof effect.

[0026] See Figures 1-5 As shown, the upper cable seat 5-1 of this utility model has upper mounting holes at the upper connecting seats 5-3 on the side of the adjacent upper semi-circular slots, and the middle upper cable seat 4-1 has corresponding upper middle mounting holes at the upper middle connecting seats 4-11 on the side of the adjacent upper middle semi-circular slots. Bolts pass through the corresponding upper mounting holes and upper middle mounting holes and are fixed with nuts. The inner sides of the upper connecting seats 5-3 and the upper middle connecting seats 4-11, as well as the inner and outer sides of the bolts, are provided with upper convex and concave connecting parts to achieve a reliable connection between the upper side plate 5 and the middle side plate 4.

[0027] See Figures 1-5 As shown, the lower cable seat 2-21 of this utility model has a lower mounting hole at the lower connecting seat 2-21-1 on the side of the adjacent lower semi-circular slot. The middle lower cable seat 4-2 has a corresponding lower middle mounting hole at the lower middle connecting seat 4-21 on the side of the adjacent lower middle semi-circular slot. The bolt passes through the corresponding lower middle mounting hole and the lower mounting hole and is fixed with a nut. The inner side of the lower connecting seat 2-21-1 and the lower middle connecting seat 4-21 and the inner and outer sides of the bolt are provided with a lower convex and concave connecting part, so as to realize a reliable connection between the middle side plate 4 and the lower cable seat 2-21 on the box body 2.

[0028] See Figures 2-4As shown, the top of the box wall 2-1 of this utility model is provided with a sealing groove 2-5. The box wall 2-1 is provided with connecting holes at the four corners and the middle of the end side of the sealing groove 2-5. The top of the upper side plate 5 is provided with an upper groove 5-2 that communicates with the sealing groove 2-5. The upper sealing ring is set in the sealing groove 2-5 and the upper groove 5-2. The upper side plate 5 is provided with at least two upper mounting seats 5-6 on the inner side of the upper groove 5-2. The middle side plate 4 is provided with a corresponding middle mounting seat 4-4. The box wall 2-1 is provided with a corresponding inner connecting seat 2-3. The screw passes through the through hole on the box cover 1 and is screwed into the corresponding connecting hole. The screw located on the upper side plate 5 passes through the through hole on the box cover 1 and the upper mounting seat 5-6 and the middle mounting seat 4-4 and is screwed into the inner connecting seat 2-3. The box cover 1 is pressed against the upper sealing ring. Therefore, the box body 2 has a good waterproof and dustproof effect and meets different environmental requirements.

[0029] As shown in Figures 1 and 2, the cover 1 of this utility model is provided with multiple protruding heat dissipation ribs 1-1 to achieve heat convection heat dissipation inside the box 2.

Claims

1. A lightning protection grounding box for optical cables in communication equipment rooms and local stations, characterized in that: It includes a housing (2) and a cover (1) mounted on the housing (2) by fasteners, wherein the cover (1) is provided with an upper sealing ring at the junction with the housing (2); The enclosure (2) has a middle side plate (4) and an upper side plate (5) on both sides of the enclosure wall (2-1) that can be disassembled for optical cables to pass through. The box (2) has a box wall opening (2-2) on the cable inlet side and cable outlet side of the box wall (2-1). The two ends of the box wall opening (2-2) are provided with box side connecting parts (2-22), and the bottom is provided with a lower cable seat (2-21). The lower cable seat (2-21) has multiple outwardly protruding lower semi-circular slots and lower connecting seats (2-21-1) on both sides of the semi-circular slots. The intermediate side plate (4) includes first side insertion connecting parts (4-3) at both ends, an upper intermediate cable seat (4-1) at the top, and a lower intermediate cable seat (4-2) at the bottom. The upper intermediate cable seat (4-1) is provided with multiple outwardly protruding upper intermediate semi-circular slots and upper intermediate connecting seats (4-11) on both sides of the upper intermediate semi-circular slots. The lower intermediate cable seat (4-2) is provided with multiple outwardly protruding lower intermediate semi-circular slots and lower intermediate connecting seats (4-21) on both sides of the lower intermediate semi-circular slots. The first side insertion connecting parts (4-3) of the intermediate side plate (4) The box side connection part (2-22) is installed in the box wall opening (2-2) and sealed by the side sealing strip. The lower middle connection seat (4-21) of the middle lower cable seat (4-2) is connected to the lower connection seat (2-21-1) of the lower cable seat (2-21) by fasteners. Each lower middle semi-circular slot is spliced ​​with the corresponding lower semi-circular slot to form their own lower optical cable channel (7). The lower optical cable channel (7) is provided with a sealing ring (3). The connection between the middle lower cable seat (4-2) and the lower cable seat (2-21) is provided with multiple lower sealing strips from the inside to the outside. The upper side plate (5) includes a second side insertion connection part (5-4) at both ends and an upper cable seat (5-1) at the bottom. The upper cable seat (5-1) is provided with a plurality of outwardly protruding upper semi-circular slots and upper connecting seats (5-3) on both sides of the upper semi-circular slots. The second side insertion connection part (5-4) of the upper side plate (5) is installed on the box side connection part (2-22) of the box wall opening (2-2) and sealed by a side sealing strip. The upper connecting seat (5-3) of the upper cable seat (5-1) is connected to the upper middle connecting seat (4-11) of the middle upper cable seat (4-1) by fasteners. Each upper semi-circular slot and the corresponding upper middle semi-circular slot are spliced ​​to form their respective upper optical cable channel (6). A sealing ring (3) is provided in the upper optical cable channel (6). A plurality of middle sealing strips are provided from the inside to the outside at the junction of the upper cable seat (5-1) and the middle lower cable seat (4-2).

2. The lightning protection grounding box for optical cables in communication equipment rooms and local stations according to claim 1, characterized in that: The sealing rings (3) in the upper optical cable channel (6) and the lower optical cable channel (7) are rubber sealing ring groups composed of multiple stacked sleeves with different diameters.

3. The lightning protection grounding box for optical cables in communication equipment rooms and central office stations according to claim 1, characterized in that: The first side insertion connection part (4-3) of the upper side plate (5) and the second side insertion connection part (5-4) of the middle side plate (4) are matched with the box side connection part (2-22) of the box wall opening (2-2), and the side sealing strip is provided in the side insertion connection part.

4. A lightning protection grounding box for optical cables in communication equipment rooms and central office stations according to claim 1, characterized in that: The upper connecting seat (5-3) of the upper cable seat (5-1) and the upper middle connecting seat (4-11) of the middle upper cable seat (4-1) are provided with multiple matching upper convex and concave connecting parts from the inside to the outside, and the middle sealing strip is provided on each corresponding upper convex and concave connecting part; the lower connecting seat (2-21-1) of the lower cable seat (2-21) and the lower middle connecting seat (4-21) of the middle lower cable seat (4-2) are provided with multiple matching lower convex and concave connecting parts from the inside to the outside, and the lower sealing strip is provided on each corresponding lower convex and concave connecting part.

5. A lightning protection grounding box for optical cables in communication equipment rooms and local stations according to claim 1 or 4, characterized in that: The upper cable seat (5-1) is provided with upper mounting holes at the upper connecting seats (5-3) on the side of the adjacent upper semi-circular slots. The middle upper cable seat (4-1) is provided with corresponding upper middle mounting holes at the upper middle connecting seats (4-11) on the side of the adjacent upper middle semi-circular slots. The bolt passes through the corresponding upper mounting holes and upper middle mounting holes and is fixed with nuts. The inner sides of the upper connecting seats (5-3) and the upper middle connecting seats (4-11) and the inner and outer sides of the bolt are provided with upper convex and concave connecting parts.

6. A lightning protection grounding box for optical cables in communication equipment rooms and local stations according to claim 1 or 4, characterized in that: The lower cable seat (2-21) is provided with a lower mounting hole at the lower connecting seat (2-21-1) on the side of the adjacent lower semi-circular slot. The middle lower cable seat (4-2) is provided with a corresponding lower middle mounting hole at the lower middle connecting seat (4-21) on the side of the adjacent lower middle semi-circular slot. The bolt passes through the corresponding lower middle mounting hole and the lower mounting hole and is fixed with a nut. The inner side of the lower connecting seat (2-21-1) and the lower middle connecting seat (4-21) and the inner and outer sides of the bolt are provided with a lower convex and concave connection part.

7. A lightning protection grounding box for optical cables in communication equipment rooms and local stations according to claim 1, characterized in that: The top of the box wall (2-1) is provided with a sealing groove (2-5). The box wall (2-1) is provided with connecting holes at the four corners and the middle of the end side of the sealing groove (2-5). The top of the upper side plate (5) is provided with an upper groove (5-2) that communicates with the sealing groove (2-5). The upper sealing ring is set in the sealing groove (2-5) and the upper groove (5-2). The upper side plate (5) is provided with at least two upper mounting seats (5-6) on the inner side of the upper groove (5-2). The middle side plate (4) is provided with a corresponding middle mounting seat (4-4). The box wall (2-1) is provided with a corresponding inner connecting seat (2-3). The screw passes through the through hole on the box cover (1) and screws onto the corresponding connecting hole. The screw located on the upper side plate (5) passes through the through hole on the box cover (1) and the upper mounting seat (5-6) and the middle mounting seat (4-4) and screws onto the inner connecting seat (2-3). The box cover (1) is pressed onto the sealing ring.

8. A lightning protection grounding box for optical cables in communication equipment rooms and local stations according to claim 1, characterized in that: The enclosure (2) has a grounding post on the inner side of the enclosure wall (2-1).

9. A lightning protection grounding box for optical cables in communication equipment rooms and central office stations according to claim 1, characterized in that: The cover (1) is provided with multiple protruding heat dissipation ribs (1-1).

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