CN204886167U - The grounding unit of the lightning protection grounding system of the outdoor optical handover equipment of the TD-LTE network - Google Patents

Abstract

The utility model discloses an outdoor light of TD -LTE network hands over equipment lightning protection ground system's ground connection unit, including frame, ground connection module and ground connection lead -in wire, the ground connection module includes that insulating substrate, metal decking, ground connection are tied and plural number cover optical cable earthing device, and insulating substrate fixes in the frame, and the metal decking is installed on insulating substrate, and ground connection is tied and is fixed on the metal decking with plural number cover earthing device, the ground connection lead -in wire is tied the electricity with ground connection and is connected. The utility model discloses the lightning current direct entry earth mat that can be effectively produces outdoor light handing -over equipment (or optical transmission route) when directly or indirectly suffering thunderbolt or lightning induction to reach the mesh of its equipment of protection.

Description

The grounding unit of the lightning protection grounding system of the outdoor optical handover equipment of the TD-LTE network

[technical field]

The utility model relates to wireless remote TD-LTE network outdoor optical transfer equipment, in particular to a grounding unit of a wireless remote TD-LTE network outdoor optical transfer device lightning protection grounding system.

[Background technique]

With the deep coverage of the wireless TD-LTE network scale, the increase of LTE base station access bandwidth and the realization of multi-scenario unified access, the optical fiber transmission resources are more tense, especially the upgrade and transformation of the wireless remote TD-LTE network. The demand for optical fiber transmission resources is more urgent. In order to solve the shortage of optical fiber transmission resources, instead of completely relying on the base station as the distribution node of optical fiber transmission, it is necessary to install outdoor optical handover equipment in the densely populated areas of remote optical transmission to make it more reliable and flexible to allocate optical transmission resources.

The application of remote TD-LTE network outdoor optical handover equipment must be able to adapt to various complex geological environments, especially in areas with high soil resistivity, which poses new challenges to its lightning protection performance.

According to the traditional construction plan, when installing outdoor optical transfer equipment in areas with high soil resistivity (above 500 ohm m), in order to prevent damage to it by lightning current generated by lightning, the grounding resistance of the ground grid is used as the evaluation standard. Then this must reduce its grounding resistance and meet the requirements of construction specifications.

The utility model with the patent number CN201220369621.3 discloses a hybrid grounding device for a distributed base station to interrupt lightning from the cable introduction, including a metal box, and a plurality of cable inlet and outlet holes on the box wall , and the optical cable grounding device, DC feeder cable grounding device, GPS coaxial cable grounding device, and control cable grounding device arranged in the box body; , control lines, etc., but cannot meet the lightning protection requirements of optical handover equipment other than base stations.

[Content of the invention]

The technical problem to be solved by the utility model is to provide a method that can effectively introduce the lightning current generated when the outdoor optical handover equipment (or optical transmission route) is directly or indirectly subjected to lightning strike or lightning induction directly into the ground network, so as to protect the safety of its equipment. The grounding unit of the lightning protection grounding system for the purpose.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is that a grounding unit of a lightning protection grounding system for outdoor optical handover equipment of a TD-LTE network includes a frame, a grounding module and a grounding lead-in wire, and the grounding module includes an insulating base plate , metal panel, ground bolt and multiple sets of grounding devices for optical cables, the insulating bottom plate is fixed on the frame, the metal panel is installed on the insulating bottom plate, the grounding bolt and multiple sets of grounding devices are fixed on the metal panel; the grounding lead-in wire is electrically connected to the grounding bolt .

For the grounding unit mentioned above, the optical cable grounding device includes an optical cable hoop, an optical cable metal sheath grounding hoop and an optical cable strengthening core grounding post, and the optical cable hoop, optical cable metal sheath grounding hoop and optical cable strengthening core grounding post are arranged in a straight line Above, the grounding hoop of the metal sheath of the optical cable is located between the hoop of the optical cable and the grounding column of the strengthening core of the optical cable.

The grounding unit described above includes a fixed optical cable row, which is fixed on the frame and fixed below the grounding module in parallel; the fixed optical cable row includes the same number of optical cable access fixing hoops as the number of optical cable grounding devices of the grounding module; The grounding column of the optical cable strengthening core of the grounding module is far away from the fixed row of optical cables, and the hoop of the optical cable is close to the fixed row of optical cables.

The grounding unit mentioned above, the grounding hoop of the metal sheath of the optical cable and the grounding column of the strengthening core of the optical cable are respectively embedded in the metal panel.

In the grounding unit mentioned above, the optical cable hoop is embedded in the insulating base plate and is electrically insulated from the metal panel.

The grounding unit described above includes a frame grounding bolt and a frame grounding lead-in wire, the frame grounding bolt is fixed on the frame, and the frame grounding lead-in wire is electrically connected to the frame grounding bolt.

The grounding unit of the lightning protection grounding system for the outdoor optical handover equipment of the TD-LTE network of the utility model can effectively introduce the lightning current generated when the outdoor optical handover equipment (or optical transmission route) is directly or indirectly subjected to lightning strikes or lightning induction directly into the ground network, so as to achieve the purpose of protecting the security of its equipment.

[Description of drawings]

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

FIG. 1 is a schematic structural diagram of a grounding unit of a lightning protection grounding system for an outdoor optical handover device in a TD-LTE network according to an embodiment of the present invention.

Fig. 2 is a perspective view of the grounding module of the embodiment of the present invention.

Fig. 3 is a partially enlarged view of part I in Fig. 2 .

Fig. 4 is an installation sectional view of the grounding unit of the embodiment of the utility model.

[Detailed ways]

The grounding unit of the lightning protection grounding system of the outdoor optical handover equipment of the TD-LTE network in the embodiment of the present invention is shown in Figures 1 to 4. 2 is fixed under the optical switching device 1.

The grounding unit 2 includes a frame, a grounding module, an optical cable fixing row 10 and grounding lead-in wires 12 and 16 .

The grounding module includes an insulating base plate 4, a metal panel 3 made of hot-dip galvanized steel, two grounding bolts 8 and 12 sets of optical cable grounding devices. The insulating base plate 4 is arranged horizontally, and both ends are fixed on the frame with bolts. The metal panel 3 is fixed on the insulating base plate 4 through bolts 9 and grounding bolts 8. The two grounding bolts 8 and 12 sets of grounding devices are fixed on the metal panel 3. ; The 12 upper ends of the ground lead-in wires are electrically connected to the ground bolts 8 respectively.

The insulating bottom plate 4 is made of unsaturated polyester resin glass fiber reinforced molding compound, which has high insulation resistance and withstand voltage strength, can avoid leakage and breakdown, and also has strong heat resistance, good thermal conductivity, moisture resistance and comparative High mechanical strength and convenient processing.

The optical cable grounding device includes an optical cable hoop 5, an optical cable metal sheath grounding hoop 7, and an optical cable reinforcement core grounding post 6. have good electrical conductivity. The optical cable hoop 5 is embedded in the insulating base plate and effectively electrically insulated from the metal panel and the like. Optical cable hoop 5, optical cable metal sheath grounding hoop 7 and optical cable strengthening core grounding column 6 are arranged in a straight line, optical cable strengthening core grounding column 6 is located at the top, optical cable hoop 5 is located at the bottom, optical cable metal sheath grounding hoop 7 It is located between the optical cable hoop 5 and the grounding column 6 of the optical cable strengthening core.

The optical cable fixing row 10 is fixed on the frame and fixed below the grounding module in parallel. The optical cable fixing row 10 includes 12 optical cable access fixing hoops 11 .

The frame ground bolt 15 is fixed on the frame, and the upper end of the frame ground lead-in wire 16 is connected with the frame ground bolt 15 .

The grounding lead-in wires 12 and 16 are all made of multi-strand copper wires with circular copper terminals installed at both ends and with a cross-sectional area of not less than 35 square millimeters.

When the lead-in optical cable 14 is connected, at first the optical cable of the optical cable fixing row 10 is connected to the fixed hoop 11 and then enters the grounding module after being fixed, and is fixed twice through the optical cable hoop 5 at the bottom of the grounding module, and the grounding hoop 7 makes the outer metal shield of the optical cable The layer is grounded, and the metal strengthening core 13 of the optical cable penetrates the grounding column 6 of the strengthening core to be grounded, and the grounding introduction of the optical cable 14 is completed.

The grounding unit of the above embodiments of the present invention can effectively introduce the lightning current generated when the outdoor optical handover equipment (or optical transmission route) is directly or indirectly struck by lightning or induced by lightning into the ground network, so as to protect the safety of the equipment. It has the characteristics of modular design, safety and reliability; good conductivity and high compressive strength; easy installation and use; low manufacturing cost; easy to popularize and apply.

Claims (6)

1. the ground unit of the outdoor optical handing-over equipment lightning protection grounding system of a TD-LTE network, comprise frame, it is characterized in that, comprise earthing module and Connect the Ground Leads into the Line, earthing module comprises insulating base, metal decking, earth bolt and plural sleeve optic cable earthing device, insulating base is fixed in frame, and metal decking is arranged on insulating base, and earth bolt and plural number cover earthing device are fixed on metal decking; Connect the Ground Leads into the Line is electrically connected with earth bolt.

2. ground unit according to claim 1, it is characterized in that, optical cable ground device comprises optical cable anchor ear, optical cable metallic shield grounding anchor ear and optical cable strengthening core earthing rod, optical cable anchor ear, optical cable metallic shield grounding anchor ear and optical cable strengthening core earthing rod are arranged point-blank, and optical cable metallic shield grounding anchor ear is between optical cable anchor ear and optical cable strengthening core earthing rod.

3. ground unit according to claim 2, is characterized in that, comprise the fixing row of optical cable, optical cable is fixed row and is fixed in frame, is fixed on the below of earthing module abreast; Optical cable is fixed package and is drawn together the optical cable identical with earthing module optical cable ground device quantity and access fixing anchor ear; The optical cable strengthening core earthing rod of earthing module fixes row away from the fixing row of optical cable, optical cable anchor ear near optical cable.

4. ground unit according to claim 2, is characterized in that, optical cable metallic shield grounding anchor ear and optical cable strengthening core earthing rod are embedded in metal decking respectively.

5. ground unit according to claim 2, is characterized in that, optical cable anchor ear to be embedded in insulating base and with metal decking electric insulation.

6. ground unit according to claim 1, is characterized in that, comprise rack earth bolt and rack earth lead-in, rack earth bolt is fixed in frame, and rack earth lead-in is electrically connected with rack earth bolt.