Lightning protection grounding device for optical cable of communication machine room and bureau station

Abstract

The invention relates to a lightning protection grounding device for optical cables of a communication machine room and a bureau station. The lightning protection grounding device comprises a box body assembly and an optical cable fixing grounding assembly, the box body assembly comprises a box body, a box cover, a middle side plate and an upper side plate, box wall openings are formed in the cable inlet side and the cable outlet side of the box wall of the box body, the upper side plate and the middle side plate are installed at the box wall openings, a plurality of upper-layer optical cable ducts are formed in the upper portions of the upper side plate and the middle side plate, and a plurality of lower-layer optical cable ducts are formed in the lower portion of the middle side plate and the lower cable base. Rubber sealing ring sets are installed in the upper-layer optical cable hole channel and the lower-layer optical cable hole channel. The optical cable fixing and grounding assembly comprises two sets of optical cable fixing and grounding units used for fixing and grounding the two ends of a stripped and broken metal reinforcing core of an optical cable. And the two groups of optical cable fixed grounding units are arranged on the box bottom plate in an insulating manner and are respectively positioned on a cable inlet side and a cable outlet side. The device is compact in structure, reliable in grounding line isolation, flexible in construction, convenient to operate, capable of improving the protection level and high in adaptability.

Description

Technical Field

[0001] The present invention relates to a lightning protection and grounding device for optical cables in communication machine rooms and stations, belonging to the technical field of lightning protection and grounding for communication machine rooms and stations. Background Art

[0002] In the optical cable system of communication machine rooms and stations, an optical cable usually has a metal strengthening core in the middle. Since the metal strengthening core has the functions of ensuring sufficient mechanical strength and stable physical properties of the optical cable, and can ensure that the optical cable has a certain protection ability against external influences under natural conditions, grounding the optical cable core wire is a very important measure to protect the optical cable system and terminal equipment from lightning strikes and static electricity damage. Usually, the incoming optical cable first enters each cabinet in the machine room, and then after the optical cable is stripped, the metal strengthening core is connected to a special integral grounding clamp on the ODF frame, and the metal strengthening core is fixed by crimping. This grounding method has a simple structure and low cost, but there are also unreliable electrical isolations, large fluctuations in the contact resistance of the crimping point. When the lightning-induced voltage exceeds 5 kV, arc discharge is likely to occur, and its failure rate increases by 27% according to the IEC61000-4-5 surge test. The lightning current enters the machine room along the metal strengthening core, easily causing damage to equipment. Moreover, after the optical cable is used for a long time, the insulation material carbonizes due to a temperature rise of 80 K caused by damage, posing a hidden danger of thermal runaway in the cabinet, and safety hazards such as fires and electric shocks caused by the electrification of the metal strengthening core during the operation of the optical fiber line. For this reason, another method is to cut the metal strengthening core of the optical cable into two sections at the entrance of the machine room, each section is grounded separately, and an insulating material is used for isolation in the middle to reduce the influence of lightning and strong electricity on the entire line and equipment. It is installed using a grounding box. Although it is sealed with a single-layer silica gel, its IP protection level is ≤ IP54. In a salt spray environment such as coastal areas, the risk of electrolytic corrosion causing the housing to perforate is increased by 3 times. Therefore, the internal grounding of the cabinet fails due to damage to the optical cable after long-term use or long-term high-voltage breakdown, bringing great safety hazards to the operation of the machine room. Summary of the Invention

[0003] The purpose of the present invention is to provide a lightning protection and grounding device for optical cables in communication machine rooms and stations, which has a compact structure, reliable isolation of grounding lines, flexible construction, convenient operation, can improve the protection level, and has strong adaptability.

[0004] The technical solution of the present invention to achieve the above object is: a lightning protection and grounding device for optical cables in communication machine rooms and stations, characterized in that it includes a box body assembly and an optical cable fixed grounding assembly; The box body assembly includes a box body, a box cover, a detachable middle side plate and upper side plate for the optical cable to pass through, and a rubber sealing ring group with adjustable inner diameter; The box body is provided with box wall openings on the cable inlet side and the cable outlet side of the box wall. Box side connection parts are provided at both ends of the box wall openings, and a lower cable seat is provided at the bottom. The lower cable seat has a plurality of outward-extending lower semi-circular slot holes and lower connection seats on both sides of the semi-circular slot holes. A grounding post is provided inside the box wall. The intermediate side plate includes first side insertion connection parts at both ends, an intermediate upper cable seat at the upper part, and an intermediate lower cable seat at the lower part. The intermediate upper cable seat is provided with a plurality of outward-extending upper intermediate semi-circular slot holes and upper intermediate connection seats on both sides of the upper intermediate semi-circular slot holes. The intermediate lower cable seat is provided with a plurality of outward-extending lower intermediate semi-circular slot holes and lower intermediate connection seats on both sides of the lower intermediate semi-circular slot holes. The first side insertion connection part of the intermediate side plate is installed on the box side connection part of the box wall opening and sealed by a side sealing strip. The lower intermediate connection seat of the intermediate lower cable seat is connected to the lower connection seat of the lower cable seat by a fastener. Each lower intermediate semi-circular slot hole is spliced with the corresponding lower semi-circular slot hole to form respective lower-layer optical cable channels. A rubber sealing ring group composed of a plurality of sleeves with different stacked apertures is installed in each lower-layer optical cable channel. A plurality of lower sealing strips are provided from the inside to the outside at the connection between the intermediate lower cable seat and the lower cable seat. The upper side plate includes second side insertion connection parts at both ends and an upper cable seat at the lower part. The upper cable seat is provided with a plurality of outward-extending upper semi-circular slot holes and upper connection seats on both sides of the upper semi-circular slot holes. The second side insertion connection part of the upper side plate is installed on the box side connection part of the box wall opening and sealed by a side sealing strip. The upper connection seat of the upper cable seat is connected to the upper intermediate connection seat of the intermediate upper cable seat by a fastener. Each upper semi-circular slot hole is spliced with the corresponding upper intermediate semi-circular slot hole to form respective upper-layer optical cable channels. A rubber sealing ring group composed of a plurality of sleeves with different stacked apertures is installed in each upper-layer optical cable channel. A plurality of intermediate sealing strips are provided from the inside to the outside at the connection between the upper cable seat and the intermediate lower cable seat. The optical cable fixing and grounding assembly includes two groups of optical cable fixing and grounding units for fixing and grounding the two ends of the metal strengthening cores of the opened and disconnected optical cables. The two groups of optical cable fixing and grounding units are installed on the box bottom plate in an insulated manner and are respectively located on the cable inlet side and the cable outlet side. The optical cable fixed grounding unit includes a lower bottom plate for the passage of the lower-layer optical cable, an upper bottom plate for the passage of the upper-layer optical cable, a grounding bar, and a plurality of inverted U-shaped core pressing plates. At least two hinge support seats are arranged on the inner side of the lower bottom plate, and at least two support seats are arranged on the outer side. The pin shaft seat at the bottom of the upper bottom plate is connected to the hinge support seat and can be turned upwards. The support seats are used to support and limit the horizontally placed upper bottom plate, and the clamping feet at the top of the support seats pass through the clamping openings on the upper bottom plate. Upper grounding terminals and lower grounding terminals are respectively arranged on the upper bottom plate and the lower bottom plate. Each core pressing plate is installed on the inner side of the lower bottom plate and the inner side of the upper bottom plate through fasteners. A V-shaped groove and an arc-shaped groove for fixing the metal strengthening core and the grounding wire are arranged on the bottom surface of the core pressing plate. One end of the grounding bar has a grounding bar terminal, and a plurality of grounding screws for fixing the other end of the grounding wire are installed on the grounding bar.

[0005] The box body assembly of the present invention adopts a box body, a box cover, a detachable intermediate side plate and an upper side plate for the passage of the optical cable. The intermediate side plate and the upper side plate are hermetically installed in multiple layers at the opening of the box wall of the box body, and the intermediate side plate is hermetically connected to the upper side plate. Therefore, a plurality of upper semi-circular through holes on the upper side plate and the corresponding upper intermediate semi-circular through holes on the intermediate side plate are spliced to form respective upper-layer optical cable channels. At the same time, each lower intermediate semi-circular through hole on the intermediate side plate and the corresponding lower semi-circular through holes on the lower cable seat are spliced to form respective lower-layer optical cable channels. Therefore, rubber sealing ring groups are installed in the upper-layer optical cable channels and the lower-layer optical cable channels on the cable inlet side and the upper-layer optical cable channels and the lower-layer optical cable channels on the cable outlet side of the box body. Since the rubber sealing ring group adopts a stacked ring structure, it is convenient to adjust the inner diameter of the rubber sealing ring group, which can meet the sealing of all optical cables in the existing network. The operation is simple and convenient, and the application range is wide, which can provide reliable protection for the dust-proof and waterproof of the stripped optical cable. Especially in the salt spray environment, its working reliability is improved. The present invention adopts a spliced upper-layer optical cable channel and a lower-layer optical cable channel to meet the tapping construction in multiple scenarios. The optical cable entering the computer room or station is stripped and cut for the middle local metal strengthening core, and the metal strengthening core is fixed and grounded. Without damaging the original line, the hidden danger cleaning and renovation are completed, which reduces the construction difficulty and requirements. It not only adapts to the newly built station, but also can transform the existing laid lines in the computer room. On the premise of meeting the requirements of the optical cable use, it can also meet the stripping of all optical cables in the computer room, and solve the hidden danger of the existing optical cables.

[0006] The optical cable fixed grounding unit of the present invention adopts an upper-layer optical cable and a lower-layer optical cable structure. During implementation, the metal strengthening core after stripping and cutting can be installed on the corresponding upper-layer bottom plate and lower-layer bottom plate through a core pressing plate. At the same time, the grounding wire is connected to the corresponding metal strengthening core and grounding busbar to achieve single-point grounding, so as to avoid loop interference, flexibly increase or decrease the optical cable, increase the flexibility of use, and can be flexibly configured according to the cable resources or space of the computer room and the station. The upper-layer bottom plate of the present invention adopts a flip structure, which can facilitate the operations of optical cable stripping, fixing and grounding in a limited space, and effectively solves the problem of subsequent construction space. The optical cable fixed grounding assembly of the present invention uses two groups of optical cable fixed grounding units to ground and fix both ends of the metal strengthening core of the stripped and disconnected optical cable, realizing the insulation of the optical cable before entering the computer room and the station, avoiding the metal strengthening core being charged after the external lightning strike, power cable, etc. penetrate the optical cable, resulting in potential safety hazards to the line-end ODF, OCC, etc., moving the risk forward to the outdoor or centralized management. At the same time, when the metal strengthening core is charged due to the external lightning strike, power cable, etc. penetrating the optical cable in the computer room, it can also be grounded in time through this lightning protection and grounding device to further protect the computer room equipment, effectively solving the potential safety hazards such as fire and electric shock caused by the charged metal strengthening core during the operation of the optical fiber line due to extreme weather, failure, non-standard construction, etc. The lightning protection device of the present invention has a compact structure and reasonable installation, which can effectively improve the safety performance of the computer room. The protection level can reach IP55, and it is suitable for installation in multiple scenarios such as indoor, outdoor, and cable tray. It can cover various use environments such as the transformation and new construction of the existing network, and has good applicable scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The following further describes the embodiments of the present invention in detail with reference to the drawings.

[0008] Figure 1 It is a schematic structural diagram of the lightning protection and grounding device for optical cables in communication computer rooms and stations of the present invention.

[0009] Figure 2 It is a schematic structural diagram of the lightning protection and grounding device for optical cables in communication computer rooms and stations of the present invention with the box cover removed.

[0010] Figure 3 It is a schematic structural diagram of the box body assembly of the present invention.

[0011] Figure 4 is Figure 3 The enlarged structural schematic diagram of part I.

[0012] Figure 5 is Figure 3 The enlarged structural schematic diagram of part II.

[0013] Figure 6 It is a schematic structural diagram of the box cover of the present invention.

[0014] Figure 7 It is a front view structural schematic diagram of the optical cable fixing and grounding component of the present invention.

[0015] Figure 8 is Figure 7 the A-direction structural schematic diagram of Figure 9 It is a three-dimensional structural schematic diagram of the optical cable fixing and grounding component of the present invention.

[0016] Figure 10 It is a structural schematic diagram of the alarm monitoring unit of the present invention.

[0017] Wherein: 1 - box cover, 1-1 - heat dissipation rib, 1-2 - lamp holder, 1-3 - upper insulating column, 2 - box body, 2-1 - box wall, 2-11 - sealing groove, 2-2 - box wall opening, 2-21 - lower cable seat, 2-21-1 - lower connection seat, 2-21-2 - lower plug board, 2-21-3 - lower slot, 2-22 - box side connection part, 2-23 - inner connection seat, 2-3 - middle side plate, 2-31 - middle upper cable seat, 2-31-1 - upper middle connection seat, 2-31-2 - middle upper slot, 2-32 - middle lower cable seat, 3-32-1 - lower middle connection seat, 3-32-2 - middle lower slot, 3-32-3 - middle lower plug board, 2-33 - first side plug connection part, 2-34 - middle mounting seat, 2-4 - upper side plate, 2-41 - upper cable seat, 2-42 - upper connection seat, 2-43 - upper groove, 2-44 - second side plug connection part, 2-45 - upper plug board 2-46 - upper mounting hole, 2-5 - grounding column, 2-6 - box bottom plate, 3 - rubber sealing ring group, 4 - upper layer bottom plate, 4-1 - upper clamping plate, 4-2 - clamping opening, 5 - support seat, 5-1 - clamping foot, 6 - pressure core plate, 7 - hinged support seat, 8 - lower layer bottom plate, 8-1 - folded edge, 8-2 - lower clamping plate, 9 - grounding busbar, 10 - current transformer, 11 - alarm monitoring unit, 12 - middle fixing plate, 12-1 - lower insulating column, 12-2 - wire tying buckle, 13 - upper grounding terminal, 14 - lower grounding terminal, 15 - grounding busbar terminal, 16 - pin shaft seat. Detailed implementation manners

[0018] See Figure 1 , 2 As shown in, a lightning protection and grounding device for optical cables in communication machine rooms and stations of the present invention includes a box body assembly and an optical cable fixing and grounding component. See Figures 1 to 3As shown in FIGS. 6, the box body assembly of the present invention includes a box body 2, a box cover 1, a detachable intermediate side plate 2-3 and upper side plate 2-4 for the optical cable to pass through, and a rubber sealing ring group with adjustable inner diameter. The box body 2, box cover 1, intermediate side plate 2-3 and upper side plate 2-4 of the present invention are made of metal materials, such as stainless steel plates or aluminum alloys. Through the detachable intermediate side plate 2-3 and upper side plate 2-4, the fishing joint method can be realized. The middle part of the optical cable entering the computer room or station is locally stripped about 30 cm. The metal strengthening core is fixed and installed and grounded through a grounding wire, which will not damage the strength of the optical cable and greatly reduces the construction difficulty and requirements. In particular, the optical cable can be arranged in multiple layers in the box body 2, which can greatly improve the construction flexibility. It can not only solve the potential safety hazards of the existing optical cables, but also adapt to the newly built stations, etc. The rubber sealing ring group 3 with adjustable inner diameter seals the incoming and outgoing optical cables, so that the lightning protection and grounding device can be applicable to all optical cable diameters in the existing network, and the scope of use is wide.

[0019] See Figures 1 to 5 As shown in FIGS., the box body 2 of the present invention is provided with box wall openings 2-2 on the cable inlet side and cable outlet side of the box wall 2-1. Both ends of the box wall opening 2-2 are provided with box side connection parts 2-22, and the bottom is provided with a lower cable seat 2-21. The lower cable seat 2-21 has a plurality of outwardly extending lower semi-circular slots and lower connection seats 2-21-1 on both sides of the semi-circular slots. When the intermediate side plate 2-3 is hermetically installed at the box wall opening 2-2, the lower cable seat 2-21 and the intermediate lower cable seat 2-32 on the intermediate side plate 2-3 form an inlet and outlet channel for the lower layer optical cable. A grounding column 2-5 is provided in the box wall 2-1, and the box body 2 is reliably grounded by connecting the grounding column 2-5 to the grounding wire.

[0020] See Figures 1 to 5As shown in the figure, the middle side plate 2-3 of the present invention includes first side insertion connection parts 2-33 at both ends, an upper middle cable seat 2-31 and a lower middle cable seat 2-32 at the lower part. The upper middle cable seat 2-31 is provided with a plurality of outwardly extending upper middle semi-circular slot holes and upper middle connection seats 2-31-1 on both sides of the upper middle semi-circular slot holes. The lower middle cable seat 2-32 is provided with a plurality of outwardly extending lower middle semi-circular slot holes and lower middle connection seats 3-32-1 on both sides of the lower middle semi-circular slot holes. The first side insertion connection part 2-33 of the middle side plate 2-3 is installed on the box side connection part 2-22 of the box wall opening 2-2 and sealed by a side sealing strip. Therefore, the middle side plate 2-3 is hermetically installed on the box side connection part 2-22 of the box wall opening 2-2, so that the box body 2 has good dust-proof and waterproof effects. The lower middle connection seat 3-32-1 of the lower middle cable seat 2-32 is connected to the lower connection seat 2-21-1 of the lower cable seat 2-21 through fasteners. Each lower middle semi-circular slot hole is spliced with the corresponding lower semi-circular slot hole to form its own lower layer optical cable duct. A rubber sealing ring group 3 composed of a plurality of sleeves with different stacked apertures is installed in each lower layer optical cable duct. Each sleeve is in the shape of two semi-circles with different diameters and an opening in the middle. Therefore, it is convenient to adjust the inner diameter of the rubber sealing ring group 3 to effectively seal different models of optical cables. A plurality of lower sealing strips are provided from the inside to the outside at the connection between the lower middle cable seat 2-32 and the lower cable seat 2-21. The rubber sealing ring group of the present invention can adopt TM rubber. Since the rubber sealing ring group 3 can form a variable diameter structure by removing the inner small-diameter sealing sleeves, it can reliably seal optical cables with different diameters, is simple and convenient to operate, and has a wide range of applications. See Figures 1 to 5 As shown in the figure, the upper side plate 2-4 of the present invention includes second side insertion connection parts 2-44 at both ends and an upper cable seat 2-41 at the lower part. The upper cable seat 2-41 is provided with a plurality of outwardly extending upper semi-circular slot holes and upper connection seats 2-42 on both sides of the upper semi-circular slot holes. The second side insertion connection part 2-44 of the upper side plate 2-4 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 connection seat 2-42 of the upper cable seat 2-41 is connected to the upper middle connection seat 2-31-1 of the upper middle cable seat 2-31 through fasteners. Each upper semi-circular slot hole is spliced with the corresponding upper middle semi-circular slot hole to form its own upper layer optical cable duct. A rubber sealing ring group 3 composed of a plurality of sleeves with different stacked apertures is installed in the upper layer optical cable duct. A plurality of middle sealing strips are provided from the inside to the outside at the connection between the upper cable seat 2-41 and the lower middle cable seat 2-32. The upper side plate 2-4 is hermetically installed on the box side connection part 2-22 of the box wall opening 2-2 and is hermetically connected to the middle side plate 2-3. Similarly, a variable diameter structure is formed through the rubber sealing ring group 3, which can reliably seal upper layer optical cables with different diameters and has good dust-proof and waterproof effects.

[0021] See Figure 2 , 7As shown in Figs. 0 - 9, the optical cable fixing and grounding assembly of the present invention includes two optical cable fixing and grounding units for fixing and grounding the two ends of the metal strengthening cores for stripping and disconnecting the optical cable. The two optical cable fixing and grounding units are insulated and installed on the bottom plate 2 - 6 of the box and are respectively located on the cable inlet side and the cable outlet side. Since the two optical cable fixing and grounding units are respectively located on both sides of the box body 2, before the optical cable enters the computer room, only the metal strengthening core of the optical cable is stripped and disconnected, and the metal strengthening core at the disconnected end is fixed and grounded in the optical cable fixing and grounding unit, so as to realize the insulation of the optical cable before entering the computer room and the station, avoid the metal strengthening core being charged after the external lightning strike, power cable, etc. penetrate the optical cable, and cause potential safety hazards to the line - end ODF and OCC. At the same time, when the equipment in the computer room is affected by external lightning strikes, power cables, etc. and the metal strengthening core of the optical cable is charged, it can also be grounded in time through this lightning protection and grounding device, further protecting the computer room equipment.

[0022] See Figure 2 、 7 As shown in Figs. 7 - 9, the optical cable fixing and grounding unit of the present invention includes a lower - layer bottom plate 8 for the lower - layer optical cable to pass through, an upper - layer bottom plate 4 for the upper - layer optical cable to pass through, a grounding bar 9, and a plurality of inverted - U - shaped core - pressing plates 6. The lower - layer bottom plate 8, the upper - layer bottom plate 4, and the core - pressing plates 6 are all made of metal materials. At least two hinged support seats 7 are arranged on the inner side of the lower - layer bottom plate 8, and at least two support seats 5 are arranged on the outer side. The pin - shaft seat 16 at the bottom of the upper - layer bottom plate 4 is connected to the hinged support seat 7 and can be turned upwards. The pin - shaft seat 16 is installed on the upper - layer bottom plate 4 through fasteners, and the rotating shaft on the pin - shaft seat 16 passes through the installation hole of the hinged support seat 7. The rotating shaft can adopt an expanding stepped structure. The support seat 5 is used to support and limit the horizontally placed upper - layer bottom plate 4, and the clamping feet 5 - 1 at the top of the support seat 5 pass through the bayonet 4 - 2 of the upper - layer bottom plate 4. Therefore, the upper - layer bottom plate 4 can be turned upwards to strip the lower - layer optical cable, fix the two ends of the metal strengthening core of the cut - off optical cable, and connect it to the grounding bar 9 through a grounding wire, realizing the insulation of the optical cable before entering the computer room and the station, and sealing the optical cable in the lower - layer optical cable duct. Since the support seat 5 supports and limits the horizontally placed upper - layer bottom plate 4, and at the same time, because the clamping feet 5 - 1 pass through the bayonet 4 - 2 of the upper - layer bottom plate 4, without external force, the upper - layer bottom plate 4 will not turn over, which not only facilitates the stripping, cutting, and fixing of the metal strengthening core of the optical cable introduced before entering the computer room and the station, but also does not affect the mechanical strength of the optical cable.

[0023] See Figures 7 to 9As shown, on the upper bottom plate 4 and the lower bottom plate 8 of the present invention, an upper grounding terminal 13 and a lower grounding terminal 14 are respectively provided. The grounding system is connected to the lower grounding terminal 14, and the upper grounding terminal 13 is connected to the lower grounding terminal 14 through a grounding wire, so that the upper bottom plate 4 and the lower bottom plate 8 are in an equipotential grounding state. Each core pressing plate 6 is installed on the inner side of the lower bottom plate 8 and the inner side of the upper bottom plate 4 through fasteners. The bottom surface of the core pressing plate 6 is provided with a V-shaped groove and an arc-shaped groove for fixing the metal strengthening core and the grounding wire of the optical cable. The metal strengthening core and the grounding wire are reliably passed through the core pressing plate 6 on the corresponding bottom plate. One end of the grounding busbar 9 has a grounding busbar terminal 15, and a plurality of grounding screws for fixing the other end of the grounding wire are installed on the grounding busbar 9. During construction, the lead wire of the grounding system is introduced into the box body 2 and connected to the grounding busbar terminal 15. The optical cable is stripped at the box body 2. After the metal strengthening core is cut off, the metal strengthening cores at the two cut-off points are fixed on the corresponding upper bottom plate 4 and lower bottom plate 8 through the core pressing plate 6. One end of the grounding wire is installed on the core pressing plate 6 and connected to the metal strengthening core, and the other end is connected to the grounding busbar 9 through a grounding bolt. The metal strengthening core of the optical cable before entering the computer room is cut off and grounded and then insulated, and at the same time, the metal strengthening core of the optical cable entering the computer room is also grounded, realizing the two-way grounding of the optical cable, fundamentally solving the safety hazards such as the external lightning strike and the power cable piercing the optical cable, causing the metal strengthening core to be charged and leading to equipment at the line end, and improving the protection performance of the equipment.

[0024] See Figure 1 、 6, as shown in Fig. 10, there is a convex part on the cover 1 of the present invention. An upper insulating column 1-3 is provided inside the convex part. The alarm monitoring unit 11 is installed on the upper insulating column 1-3. The alarm monitoring unit 11 is installed inside the cover 1, and the cover 1 is provided with a plurality of convex heat dissipation ribs 1-1 to dissipate heat by convection. The alarm monitoring unit 11 of the present invention adopts an existing central microprocessor. The box body 2 is provided with a current transformer 10 for recording the number of lightning strikes on the metal strengthening core through the current transformer 10. A temperature sensor is installed on the upper bottom plate 4 or / and the lower bottom plate 8 to monitor the temperature at the fixing place of the metal strengthening core through the temperature sensor. And a humidity sensor is installed on the box bottom plate 2-6 or the lower part of the box body 2. When water enters the inside of the box body 2, the product gives a water immersion alarm. The current transformer 10, the grounding resistance, the humidity sensor and the temperature sensor are connected to the alarm monitoring unit 11. The alarm monitoring unit 11 is provided with a communication port for communicating with the management host and a fire fighting input and output interface. The alarm monitoring unit 11 is provided with a wireless communication module. The alarm monitoring unit 11 is used for recording the number of lightning strikes on the optical cable metal core, monitoring and alarming the temperature of the optical cable fixed grounding unit, the humidity inside the box body 2 and the failure. An indicator light is provided on the alarm monitoring unit 11 at the lamp holder 1-2 of the cover 1. When the temperature exceeds 70°C, a high temperature alarm is generated, solving the hidden danger of thermal runaway. When water enters the inside of the chassis, the product gives a water immersion alarm; when the lightning protection function fails, a failure alarm is generated and effective management is carried out, greatly improving the safe use performance.

[0025] See Figures 7 to 9 , as shown in Fig., the present invention is also provided with an intermediate fixing plate 12 with flanges on all sides. The intermediate fixing plate 12 is made of metal material. The intermediate fixing plate 12 is installed on the box bottom plate 2-6. The strength of the lightning protection grounding device is further improved through the intermediate fixing plate 12. A plurality of mounting holes are provided on the box bottom plate 2-6. The intermediate fixing plate 12 is installed on the box bottom plate 2-6 by screws. At the same time, installation on the indoor, outdoor and cable tray is realized through the mounting holes on the box bottom plate 2-6. A plurality of lower insulating columns 12-1 are fixed on the intermediate fixing plate 12. Both sides of each lower bottom plate 8 are installed in the screw holes of the lower insulating columns 12-1 through fasteners, and two groups of optical cable fixed grounding units are insulated and installed on the intermediate fixing plate 12 to realize modular installation. The intermediate fixing plate 12 is provided with a plurality of wire ties 12-2 in the middle to bundle and limit the optical cables passing through the box.

[0026] See Figures 7 to 9As shown, the two ends and the outer side of the lower bottom plate 8 of the present invention are provided with downward flanges, and the inner side is provided with a downward fold 8-1 to improve the strength of the lower bottom plate 8. A grounding bar 9 is installed on the fold 8-1. Therefore, the lower bottom plate 8, the upper bottom plate 4 and the grounding bar 9 are all installed on the lower bottom plate 8. The grounding bar terminal 15 connected to the grounding system is installed on the grounding bar through a fastener, forming a modular production. The upper grounding terminal 13 is installed at the end of the lower bottom plate 8. See Figure 7 , 9 As shown, the grounding bar terminals 15 on the grounding bar 9 on the lower bottom plate 8 are located on the same side. The upper grounding terminals 13 of each optical cable fixed grounding unit are respectively installed at the opposite ends of the lower bottom plate 8. The metal strengthening core of the optical cable entering the box body 2 is disconnected. One end is installed on the lower bottom plate 8 on the cable inlet side through a core pressing plate 6. At the same time, the grounding wire connected to the metal strengthening core is also connected to the core pressing plate 6 and the grounding bar 9. The other end of the disconnected metal strengthening core of the optical cable is installed on the lower bottom plate 8 on the cable outlet side through a core pressing plate 6. The metal strengthening core on the cable outlet side is connected to the grounding bar 9 through a grounding wire, which can achieve electrical insulation before the optical cable enters the computer room and the station, and can also be grounded through the metal strengthening core when the equipment in the computer room is struck by lightning, further protecting the equipment in the computer room with high protection performance. See Figures 7 to 9 As shown, the outer side of the lower bottom plate 8 of the present invention is provided with a lower clamping plate 8-2 corresponding to the core pressing plate 6, which is convenient for limiting and fixing the lower-layer optical cable entering the box body 2.

[0027] See Figures 7 to 9 As shown, the periphery of the upper bottom plate 4 of the present invention is provided with downward flanges. Similarly, the upper bottom plate 4 has good mechanical strength. The upper grounding terminal 13 is installed at the flange at the end of the upper bottom plate 4. The upper grounding terminals 13 on the optical cable fixed grounding unit and the lower grounding terminals 14 are on the same side and can be connected through a grounding wire. The metal strengthening core of the optical cable entering the box body 2 is stripped, disconnected and fixed. One end of the metal strengthening core is installed on the upper bottom plate 4 on the cable inlet side through a core pressing plate 6. The metal strengthening core is installed on the grounding bar 9 through a grounding wire via a grounding bolt. The other end of the disconnected metal strengthening core of the optical cable is installed on the upper bottom plate 4 on the cable outlet side through a core pressing plate 6. The metal strengthening core is then connected to the grounding bar 9 through a grounding wire, grounding the metal strengthening core of the optical cable entering the computer room and being charged. It can achieve electrical insulation before the optical cable enters the computer room and the station, and can also be grounded when the equipment in the computer room is charged due to the metal strengthening core in the optical cable. Moreover, the outer side of the upper bottom plate 4 is provided with an upper clamping plate 4-1 corresponding to the core pressing plate 6, which is convenient for limiting and fixing the upper-layer optical cable entering the box body 2. See Figures 7 to 9As shown in the figure, symmetrical bayonets 4-2 are provided on the upper bottom plate 4 of the present invention. The support seat 5 is T-shaped and is installed on the lower bottom plate 8 through fasteners. The clamping feet 5-1 at the top of the support seat 5 are arc-shaped feet with an open top. The two arc-shaped feet are inserted into the corresponding bayonets 4-2, which not only facilitates the flipping operation of the upper bottom plate 4 but also reliably limits the flat upper bottom plate 4 through the support seat 5.

[0028] See Figures 3 to 5 As shown in the figure, the first side insertion connection part 2-33 of the upper side plate 2-4 and the second side insertion connection part 2-44 of the middle side plate 2-3 of the present invention and the box side connection part 2-22 of the box wall opening 2-2 are matching side convex and concave connection parts, and side sealing strips are provided at the side convex and concave connection parts. Figures 3 to 5 As shown in the figure, the box side connection part 2-22 of the box wall opening 2-2 of the present invention is a connection groove on the box side, while the first side insertion connection part 2-33 of the upper side plate 2-4 and the second side insertion connection part 2-44 of the middle side plate 2-3 are outwardly convex connection convex plates. The side sealing strip is provided in the connection groove. The connection convex plates at both ends of the upper side plate 2-4 and the middle side plate 2-3 are arranged in the connection groove of the box wall opening 2-2 to realize the sealed connection of the upper side plate 2-4 and the middle side plate 2-3. The present invention may also be that both ends of the upper side plate 2-4 and the middle side plate 2-3 are provided with connection grooves, the side sealing strip is provided in the connection grooves, and the box side connection part 2-22 of the box wall opening 2-2 is an outwardly convex connection convex plate, and the connection convex plate of the box wall opening 2-2 is connected to the connection grooves of the upper side plate 2-4 and the middle side plate 2-3.

[0029] See Figures 3 to 5 As shown in the figure, multiple matching upper convex and concave connection parts are provided from the inside to the outside at the upper connection seat 2-42 of the upper cable seat 2-41 and the upper middle connection seat 2-31-1 of the middle upper cable seat 2-31, and middle sealing strips are provided at each corresponding upper convex and concave connection part. See Figure 4 , 5 As shown in the figure, multiple upper insertion plates 2-45 are provided from the inside to the outside at the lower part of the upper connection seat 2-42 of the upper cable seat 2-41 of the present invention, and multiple middle upper slots 2-31-2 are provided from the inside to the outside at the upper middle connection seat 2-31-1. The middle sealing strip is provided in the middle upper slots 2-31-2, and the multiple upper insertion plates 2-45 on the upper cable seat 2-41 are installed in the corresponding middle upper slots 2-31-2. The present invention may also have multiple upper slots provided from the inside to the outside at the lower part of the upper connection seat 2-42 of the upper cable seat 2-41, and multiple middle upper insertion plates provided from the inside to the outside at the upper middle connection seat 2-31-1. The middle sealing strip is provided in the upper slots, and each middle upper insertion plate is correspondingly installed in the upper slots to realize the labyrinth seal at the connection and improve the waterproof and dustproof effects.

[0030] See Figures 3 to 5As shown in the figure, at the lower connecting seat 2-21-1 of the lower cable seat 2-21 of the present invention and the lower middle connecting seat 3-32-1 of the middle lower cable seat 2-32, a plurality of mating lower convex and concave connecting parts are provided from inside to outside, and the lower sealing strip is arranged at the corresponding lower convex and concave connecting parts. See Figure 4 , 5 As shown in the figure, on the inner side of the lower connecting seat 2-21-1 of the lower cable seat 2-21 of the present invention, a lower slot 2-21-3 is provided, and lower inserting plates 2-21-2 are provided in the middle and on the outer side. And on the inner side of the lower middle connecting seat 3-32-1 of the middle lower cable seat 2-32, a middle lower inserting plate 3-32-3 is provided, and a middle lower slot 3-32-2 is provided on the outer side of the middle part. The lower sealing strip is arranged in the lower slot 2-21-3 and the middle lower slot 3-32-2. The middle lower inserting plate 3-32-3 is arranged in the lower slot 2-21-3, and at the same time, the lower inserting plate 2-21-2 is arranged in the middle lower slot 3-32-2. The present invention may also be that the lower connecting seat 2-21-1 of the lower cable seat 2-21 is provided with a lower slot 2-21-3, and the lower middle connecting seat 3-32-1 of the middle lower cable seat 2-32 is provided with a corresponding middle lower inserting plate 3-32-3, or the lower connecting seat 2-21-1 of the lower cable seat 2-21 is provided with a lower inserting plate 2-21-2, and the lower middle connecting seat 3-32-1 of the middle lower cable seat 2-32 is provided with a corresponding middle lower slot 3-32-2. The lower sealing strip is arranged in the lower slot 2-21-3 and the middle lower slot 3-32-2 to realize the labyrinth seal at the joint and improve the waterproof and dustproof effect.

[0031] See Figures 3 to 5 As shown in the figure, at the upper connecting seat 2-42 on the side of adjacent two upper semi-circular groove holes of the upper cable seat 2-41 of the present invention, upper mounting holes are provided. At the upper middle connecting seat 2-31-1 on the side of adjacent two upper middle semi-circular groove holes of the middle upper cable seat 2-31, corresponding upper middle mounting holes are provided. Bolts pass through the corresponding upper mounting holes and upper middle mounting holes and are fixed with nuts. Upper convex and concave connecting parts are provided on the inner sides of the upper connecting seat 2-42 and the upper middle connecting seat 2-31-1 and on the inner and outer sides of the bolts to realize the reliable connection of the upper side plate 2-4 and the middle side plate 2-3.

[0032] See Figures 3 to 5 As shown in the figure, at the lower connecting seat 2-21-1 on the side of adjacent two lower semi-circular groove holes of the lower cable seat 2-21 of the present invention, lower mounting holes are provided. At the lower middle connecting seat 3-32-1 on the side of adjacent two lower middle semi-circular groove holes of the middle lower cable seat 2-32, corresponding lower middle mounting holes are provided. Bolts pass through the corresponding lower middle mounting holes and lower mounting holes and are fixed with nuts. Lower convex and concave connecting parts are provided on the inner sides of the lower connecting seat 2-21-1 and the upper middle connecting seat 2-31-1 and on the inner and outer sides of the bolts to realize the reliable connection of the middle side plate 2-3 and the lower cable seat 2-21 on the box body 2.

[0033] See Figures 2 to 6As shown in the figure, a sealing groove 2-11 is provided at the top of the box wall 2-1 of the present invention. Connecting holes are provided at the four corners and the middle of the end side outside the sealing groove 2-11 of the box wall 2-1. An upper groove 2-43 communicating with the sealing groove 2-11 is provided at the top of the upper side plate 2-4. The sealing groove 2-11 and the upper groove 2-43 on the upper side plate 2-4 form an annular sealing groove. The sealing ring is arranged in the sealing groove 2-11 and the upper groove 2-43. At least two upper mounting seats 2-46 are provided on the inner side of the upper side plate 2-4 where the upper groove 2-43 is located. Corresponding middle mounting seats 2-34 are provided on the middle side plate 2-3. Corresponding inner connecting seats 2-23 are provided on the box wall 2-1. Screws pass through the through holes on the box cover 1 and are screwed into the corresponding connecting holes, and the screws pass through the through holes on the box cover 1 and the upper mounting seats 2-46, the middle mounting seats 2-34 and are screwed into the inner connecting seats 2-23. The box cover 1 is pressed against the sealing ring. Therefore, the box body 2 has a good waterproof and dustproof effect and meets different environmental requirements.

Claims

1. A lightning protection and grounding device for optical cables in communication machine rooms and stations, characterized in that: It includes a box body assembly and an optical cable fixing and grounding assembly; The box body assembly includes a box body (2), a box cover (1), a detachable intermediate side plate (2-3) and upper side plate (2-4) for the optical cable to pass through, and a rubber sealing ring group (3) with adjustable inner diameter; The box body (2) is provided with box wall openings (2-2) on the cable inlet side and cable outlet side of the box wall (2-1). Both ends of the box wall opening (2-2) are provided with box side connection parts (2-22), and the bottom is provided with a lower cable seat (2-21); the lower cable seat (2-21) has a plurality of outwardly extending lower semi-circular slot holes and lower connection seats (2-21-1) on both sides of the semi-circular slot holes. A grounding post (2-5) is provided inside the box wall (2-1); The intermediate side plate (2-3) includes first side insertion connection parts (2-33) at both ends, an intermediate upper cable seat (2-31) at the upper part and an intermediate lower cable seat (2-32) at the lower part. The intermediate upper cable seat (2-31) is provided with a plurality of outwardly extending upper intermediate semi-circular slot holes and upper intermediate connection seats (2-31-1) on both sides of the upper intermediate semi-circular slot holes. The intermediate lower cable seat (2-32) is provided with a plurality of outwardly extending lower intermediate semi-circular slot holes and lower intermediate connection seats (3-32-1) on both sides of the lower intermediate semi-circular slot holes. The first side insertion connection part (2-33) of the intermediate side plate (2-3) is installed on the box side connection part (2-22) of the box wall opening (2-2) and is sealed by a side sealing strip. The lower intermediate connection seat (3-32-1) of the intermediate lower cable seat (2-32) is connected to the lower connection seat (2-21-1) of the lower cable seat (2-21) through fasteners. Each lower intermediate semi-circular slot hole is spliced with the corresponding lower semi-circular slot hole to form respective lower layer optical cable channels. A rubber sealing ring group (3) composed of a plurality of sleeves with different stacked hole diameters is installed in each lower layer optical cable channel. A plurality of lower sealing strips are provided from the inside to the outside at the connection between the intermediate lower cable seat (2-32) and the lower cable seat (2-21); The upper side plate (2-4) includes second side insertion connection parts (2-44) at both ends and an upper cable seat (2-41) at the lower part. The upper cable seat (2-41) is provided with a plurality of outwardly extending upper semi-circular slot holes and upper connection seats (2-42) on both sides of the upper semi-circular slot holes. The second side insertion connection part (2-44) of the upper side plate (2-4) is installed on the box side connection part (2-22) of the box wall opening (2-2) and is sealed by a side sealing strip. The upper connection seat (2-42) of the upper cable seat (2-41) is connected to the upper intermediate connection seat (2-31-1) of the intermediate upper cable seat (2-31) through fasteners. Each upper semi-circular slot hole is spliced with the corresponding upper intermediate semi-circular slot hole to form respective upper layer optical cable channels. A rubber sealing ring group (3) composed of a plurality of sleeves with different stacked hole diameters is installed in each upper layer optical cable channel. A plurality of intermediate sealing strips are provided from the inside to the outside at the connection between the upper cable seat (2-41) and the intermediate lower cable seat (2-32); The described optical cable fixing and grounding assembly includes two sets of optical cable fixing and grounding units for fixing and grounding the two ends of the metal strengthening cores of the optical cable that are stripped and disconnected. The two sets of optical cable fixing and grounding units are installed on the box bottom plate (2-6) in an insulated manner and are located on the cable inlet side and the cable outlet side respectively; The optical cable fixing and grounding unit includes a lower bottom plate (8) for the lower-layer optical cable to pass through, an upper bottom plate (4) for the upper-layer optical cable to pass through, a grounding bar (9), and a plurality of inverted U-shaped core pressing plates (6). At least two hinge support seats (7) are arranged on the inner side of the lower bottom plate (8), and at least two support seats (5) are arranged on the outer side. The pin shaft seat (16) at the bottom of the upper bottom plate (4) is connected to the hinge support seat (7) and can be turned upwards. The support seat (5) is used for supporting and limiting the horizontally placed upper bottom plate (4), and the clamping foot (5-1) at the top of the support seat (5) passes through the bayonet (4-2) of the upper bottom plate (4). Upper grounding terminals (13) and lower grounding terminals (14) are respectively arranged on the upper bottom plate (4) and the lower bottom plate (8). Each core pressing plate (6) is installed on the inner side of the lower bottom plate (8) and the inner side of the upper bottom plate (4) through fasteners. A V-shaped groove and an arc-shaped groove for fixing the metal strengthening core and the grounding wire are arranged on the bottom surface of the core pressing plate (6). One end of the grounding bar (9) has a grounding bar terminal (15), and a plurality of grounding screws for fixing the other end of the grounding wire are installed on the grounding bar (9).

2. The lightning protection and grounding device for optical cables in communication machine rooms and stations according to claim 1, wherein: The described box cover (1) has a convex portion, and a plurality of upper insulating columns (1-3) are arranged on the inner side of the convex portion. The alarm monitoring unit (11) is installed on the upper insulating columns (1-3). The alarm monitoring unit (11) is installed on the inner side of the box cover (1). The box body (2) is provided with a current transformer (10) for measuring the metal strengthening core. A temperature sensor is installed on the upper bottom plate (4) or / and the lower bottom plate (8). A humidity sensor is installed on the box bottom plate (2-6) or the lower part of the box body (2). The current transformer (10), the grounding resistance, the humidity sensor, and the temperature sensor are electrically connected to the alarm monitoring unit (11). The alarm monitoring unit (11) is provided with a communication port for communicating with the management host and a fire fighting input / output interface, and the alarm monitoring unit (11) is provided with a wireless communication module. The alarm monitoring unit (11) is used for recording the lightning strike times of the optical cable metal core, monitoring and alarming the temperature of the optical cable fixing and grounding unit, the humidity inside the box body (2), and the failure. The alarm monitoring unit (11) is provided with an indicator light, and the indicator light is hermetically arranged at the lamp socket (1-2) of the box cover (1).

3. The lightning protection and grounding device for optical cables in communication machine rooms and stations according to claim 1, characterized in that: An intermediate fixing plate (12) with flanges on all four sides is also provided. The intermediate fixing plate (12) is installed on the box bottom plate (2-6). A plurality of mounting holes are arranged on the box bottom plate (2-6), and a plurality of lower insulating columns (12-1) are fixed on the intermediate fixing plate (12). The two sides of each lower bottom plate (8) are installed in the screw holes of the lower insulating columns (12-1) through fasteners, and a plurality of wire tying buckles (12-2) are arranged in the middle of the intermediate fixing plate (12).

4. The lightning protection and grounding device for optical cables in communication machine rooms and stations according to claim 1, characterized in that: Both ends and the outer sides of the described lower bottom plate (8) are provided with downward flanges, and the inner side is provided with a downward fold (8-1). A grounding bar (9) is installed on the fold (8-1). The upper grounding terminal (13) is installed at the end of the lower bottom plate (8). The outer side of the lower bottom plate (8) is provided with a lower clamping plate (8-2) protruding corresponding to the core pressing plate (6).

5. The lightning protection and grounding device for optical cables in communication machine rooms and stations according to claim 1, characterized in that: The periphery of the described upper bottom plate (4) is provided with downward flanges. The upper grounding terminal (13) is installed at the flange at the end. The outer side of the upper bottom plate (4) is provided with an upper clamping plate (4-1) protruding corresponding to the core pressing plate (6). Two bayonets (4-2) corresponding to the support seat (5) are provided on the upper bottom plate (4). The support seat (5) is in a T shape and is installed on the upper bottom plate (4) through fasteners. The clamping feet (5-1) at the top of the support seat (5) are arc-shaped feet with open tops, and the two arc-shaped feet are inserted into the corresponding bayonets (4-2).

6. The lightning protection and grounding device for optical cables in communication machine rooms and stations according to claim 1, characterized in that: The first side insertion connection part (2-33) of the described upper side plate (2-4) and the second side insertion connection part (2-44) of the middle side plate (2-3) and the box side connection part (2-22) of the box wall opening (2-2) are mating side convex and concave connection parts. A side sealing strip is arranged at the side convex and concave connection parts; Multiple mating upper convex and concave connection parts are provided from inside to outside at the upper connection seat (2-42) of the described upper cable seat (2-41) and the upper middle connection seat (2-31-1) of the middle upper cable seat (2-31). A middle sealing strip is arranged at each corresponding upper convex and concave connection part; Multiple mating lower convex and concave connection parts are provided from inside to outside at the lower connection seat (2-21-1) of the described lower cable seat (2-21) and the lower middle connection seat (3-32-1) of the middle lower cable seat (2-32). A lower sealing strip is arranged at the corresponding lower convex and concave connection parts.

7. A lightning protection and grounding device for optical cables in communication machine rooms and stations according to claim 1 or 6, characterized in that: The described upper cable seat (2-41) is provided with upper mounting holes at the upper connection seat (2-42) on the side of adjacent pairs of upper semi-circular groove holes. The middle upper cable seat (2-31) is provided with corresponding upper middle mounting holes at the upper middle connection seat (2-31-1) on the side of adjacent pairs of upper middle semi-circular groove holes. Bolts pass through the corresponding upper mounting holes and upper middle mounting holes and are fixed with nuts. Upper convex and concave connection parts are provided at the inner sides of the upper connection seat (2-42) and the upper middle connection seat (2-31-1) and on the inner and outer sides of the bolts.

8. A lightning protection and grounding device for optical cables in communication machine rooms and stations according to claim 1 or 6, characterized in that: The described lower cable seat (2-21) is provided with lower mounting holes at the lower connection seat (2-21-1) on the side of adjacent pairs of lower semi-circular groove holes. The middle lower cable seat (2-32) is provided with corresponding lower middle mounting holes at the lower middle connection seat (3-32-1) on the side of adjacent pairs of lower middle semi-circular groove holes. Bolts pass through the corresponding lower middle mounting holes and lower mounting holes and are fixed with nuts. Lower convex and concave connection parts are provided at the inner sides of the lower connection seat (2-21-1) and the lower middle connection seat (3-32-1) and on the inner and outer sides of the bolts.

9. The lightning protection and grounding device for optical cables in communication machine rooms and stations according to claim 1, characterized in that: The top of the described box wall (2-1) is provided with a sealing groove (2-11). Connection holes are provided at the four corners and the middle of the end side outside the sealing groove (2-11) of the box wall (2-1). The top of the upper side plate (2-4) is provided with an upper groove (2-43) communicating with the sealing groove (2-11). At least two upper mounting seats (2-46) are provided inside the upper side plate (2-4) at the upper groove (2-43). Corresponding middle mounting seats (2-34) are provided on the middle side plate (2-3). Corresponding inner connection seats (2-23) are provided on the box wall (2-1). Screws pass through the through holes on the box cover (1) and are screwed onto the corresponding connection holes. The screws at the upper side plate (2-4) pass through the through holes on the box cover (1), the upper mounting seats (2-46), the middle mounting seats (2-34) and are screwed onto the inner connection seats (2-23). Sealing rings are arranged in the sealing groove (2-11) and the upper groove (2-43), and the box cover (1) is pressed against the sealing rings.

10. A lightning protection and grounding device for optical cables in communication machine rooms and stations according to claim 1, characterized in that: The box cover (1) is provided with a plurality of outward convex heat dissipation rib strips (1-1).

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