CN202906314U - Connection device suitable for optical fiber composite overhead ground wire segmentation points - Google Patents

Abstract

The utility model discloses a splicing device suitable for the segmentation point of optical fiber composite overhead ground wire, which comprises a splicing box (1) for splicing the optical fiber (5.1) in the OPGW (5) and a splicing box (1) for collecting the OPGW (5.1) ), the remaining cable rack (3) of the connection box (1) and the remaining cable rack (3) are provided with an insulating structure that can make it insulated and installed on the tower (4), and also includes several The OPGW (5) is insulated down from the top of the tower along the pole tower (4) so as to access the OPGW down-conduction insulating support (2) of the junction box (1) or the remaining cable rack (3). The utility model can electrically isolate the ground wires at both ends of the OPGW segment point, and make the optical fiber communication continuous, insulate the connection box from the ground, the down-conductor from the ground, and the remaining cable rack from the ground, thereby realizing the insulation of the OPGW from the ground, Single-point grounding or segmented single-point grounding to achieve the purpose of loss reduction.

Description

A splicing device suitable for segment point of optical fiber composite overhead ground wire

technical field

The utility model relates to a splicing device suitable for a section point of an optical fiber composite overhead ground wire (OPGW). OPGW is an abbreviation of optical fiber composite overhead ground wire.

Background technique

Optical fiber composite overhead ground wire OPGW has the dual functions of ground wire and communication optical cable, and is installed on the top of the power overhead line tower. Due to the high reliability of OPGW, superior mechanical and electrical properties, good economy and practicality, it has become an important means of constructing power optical fiber communication network on transmission lines.

Considering that overhead transmission lines need to discharge current in the event of a short circuit or lightning strike, the current OPGW usually adopts a base-by-base grounding operation mode. When the transmission line is running, due to the electromagnetic and electrostatic coupling between the ground wire and the wire, the base-by-base grounding method will form an induced current between the two ground wires and between the ground wire and the earth. It will greatly increase the additional power loss of the transmission line, and this loss is proportional to the square of the load current and the length of the line.

In order to reduce the power loss of the transmission line, the OPGW needs to be insulated from the ground, single-point grounded or segmented single-point grounded. point, the OPGW should be electrically isolated and the optical path should be continuous. Therefore, there is an urgent need to develop a splicing device suitable for OPGW subsection points. The splicing device must meet the following three requirements: (1) OPGW splicing boxes, down conductors, remaining cable racks and other equipment and accessories are insulated from the ground; (2) The two ends of the ground wire segment point are electrically isolated; (3) The optical paths at both ends of the ground wire segment point are continuous.

Utility model content

The technical problem to be solved by the utility model is to provide a connecting device suitable for the OPGW subsection point, thereby reducing the power loss of the transmission line. The utility model electrically isolates the ground wires at both ends of the OPGW segment point, and makes the optical fiber communication continuous, and insulates the connection box from the ground, the down-conductor from the ground, and the remaining cable frame from the ground, thereby realizing the insulation of the OPGW from the ground and single Point grounding or segmented single point grounding to achieve the purpose of loss reduction.

The technical scheme that the utility model solves its technical problem adopts is:

A splicing device suitable for OPGW segmentation points, comprising a splicing box for connecting optical fibers in the OPGW and a remaining cable rack for collecting the OPGW, characterized in that: both the splicing box and the remaining cable rack are It is equipped with an insulating structure that can be insulated and installed on the tower, and also includes several OPGW downconducting insulating supports for leading the OPGW down from the top of the tower along the insulation of the tower so as to access the connection box or the remaining cable rack.

When in use, the optical fibers inside the OPGW on both sides of the segmentation point are spliced through the splice box, while the ground wires at the periphery of the optical fibers are insulated and disconnected.

The extension box includes an upper connection box, a lower connection box, and an isolation insulator with an optical fiber segment preset in the inner axial direction. The two ends of the optical fiber section inside the isolation insulator respectively extend into the inner side of the upper connection box and the lower connection box, and the upper connection box and the lower connection box are respectively installed with a device for introducing the optical fiber of the OPGW into the A fixing fixture for connecting the inside of the upper box or the inside of the lower box so as to be fused with the fiber segment inside the isolation insulator, and the insulating structure on the connecting box is an insulating base installed on the bottom surface of the connecting box.

The OPGW is stripped inside the fixing fixture, and the stripped optical fiber enters the upper connection box or the lower connection box. In the upper connection box and the lower connection box, the stripped optical fiber is respectively connected to the two ends of the optical fiber section inside the isolation insulator. The connection realizes the continuity of the optical path, while the stripped steel strands are separated by the isolation insulator to realize the electrical isolation.

The OPGW downconductor insulation support includes an insulation support plate, an insulation support plate fastener for fixing the insulation support plate to the tower, and an OPGW fastener vertically arranged on the surface of the insulation support plate.

The insulating structure on the remaining cable rack is an insulating support for the remaining cable rack which is arranged on its back side and is used for insulating and installing it on the pole tower.

Compared with the prior art, the utility model has the following beneficial effects:

The connection device of the utility model can realize the electrical isolation of the ground wire of the OPGW and the connection of the optical fiber, and can insulate the equipment and accessories such as the connection box, the remaining cable rack, and the down conductor from the ground, so as to meet the requirements of the single-point grounding of the OPGW segment. According to the requirements of the connection device of the subsection point, the connection device of the present invention can be used to operate the OPGW subsection single-point grounding, so as to prevent the generation of induced current in the OPGW and reduce the power loss of the transmission line.

Description of drawings

Figure 1 is a reference diagram of the use state of the splicing device in a preferred embodiment of the present invention;

Fig. 2 is a schematic structural view of a splice box in a preferred embodiment of the present invention;

Fig. 3 is a schematic structural view of the OPGW downconducting insulation support in a preferred embodiment of the present invention;

Fig. 4 is the front view when the remaining cable rack of the preferred embodiment of the utility model is fixed on the pole tower;

Fig. 5 is a left view when the remaining cable rack of the preferred embodiment of the utility model is fixed on the pole tower.

Detailed ways

Below in conjunction with specific embodiment and accompanying drawing, structure and principle of the present utility model are further described:

As shown in Figure 1, the splicing device applicable to the OPGW subsection point of the present utility model includes a splicing box 1 for continuing the optical fiber in the OPGW 5 and a remaining cable rack 3 for collecting the OPGW 5, the splicing Both the box 1 and the remaining cable rack 3 are provided with an insulating structure that can be insulated and installed on the pole tower 4; it also includes an insulating structure for leading the OPGW 5 from the top of the tower along the pole tower 4 so as to access the connection box 1 or Several OPGWs of the remaining cable rack 3 lead down the insulating support 2 .

As shown in Figure 1, the OPGW 5 on the left side of the segmentation point is led down from the top of the tower by three OPGW insulating supports 2, and then connected to the connection box 1 which is insulated and installed in the middle of the tower 4, and the OPGW 5 on the right side of the segmentation point is from the The top of the tower is led down by another 4 OPGW insulation supports 2 and then connected to the remaining cable frame 3 which is also insulated and installed in the middle of the pole tower 4 so as to wind the excessively long OPGW 5 on the remaining cable frame 3, and then connect it after obtaining a suitable length into the extension box 1 so as to realize electrical isolation and optical path continuity in the extension box 1.

As shown in FIG. 2 , the extension box 1 includes an upper connection box 1.1, a lower connection box 1.2, and an isolation insulator 1.3 with an optical fiber section 1.4 preset in the axial direction. The connecting upper box 1.1 and the connecting lower box 1.2 are arranged symmetrically up and down, and are respectively connected to the two ends of the isolation insulator 1.3. The two ends of the optical fiber section 1.4 inside the isolation insulator 1.3 extend into the inside of the connecting upper box 1.1 and the connecting lower box 1.2 respectively, so as to be fused with the optical fibers inside the OPGW on the left and right sides of the segmentation point. The connection upper box 1.1 and the connection lower box 1.2 are respectively equipped with a fixing fixture 1.5 for introducing the optical fiber of the OPGW into the connection upper box 1.1 or the connection lower box 1.2. The OPGW is stripped inside the fixing fixture 1.5, and the stripped optical fiber 5.1 enters the connection upper box 1.1 or the connection lower box 1.2, and is respectively fused with the two ends of the optical fiber section 1.4 inside the isolation insulator 1.3, and the left and right sides of the stripped segment point The steel strands on the outer layer of the OPGW are electrically isolated through the isolation insulator 1.3. The insulation structure on the connection box 1 is an insulation base 1.6 installed on the bottom surface of the connection lower box 1.2, and the connection box 1 is insulated and installed on the pole tower 4 through the insulation base 1.6.

As shown in Figure 3, the OPGW downconductor insulation support 2 includes an insulation support plate 2.1, an insulation support plate fastener 2.2 for fixing the insulation support plate 2.1 to the pole tower 4, and vertically arranged on the surface of the insulation support plate 2.1. OPGW fastener 2.3, OPGW 5 is fixed on the surface of insulating support plate 2.1 by OPGW fastener 2.3 and is led down vertically.

As shown in Figures 4 and 5, the remaining cable rack 3 includes two rod-shaped frame bodies 3.1 whose two ends are bent into opposite right-angled hooks. With the front facing outward, it also includes a remaining cable rack fixing plate 3.3 arranged on the back of the rod-shaped frame body 3.1 for fixing the two rod-shaped frame bodies 3.1 together. The insulating structure on the remaining cable rack 3 is the remaining cable rack insulating support 3.2 provided on the back of the remaining cable rack fixing plate 3.3 to insulate and install the remaining cable rack 3 on the pole tower 4 .

Claims (4)

1. A splicing device suitable for the subsection point of optical fiber composite overhead ground wire, including a splicing box (1) for splicing the optical fiber (5.1) in the OPGW (5) and a splicing box (1) for collecting the remaining OPGW (5) The cable rack (3) is characterized in that: both the connection box (1) and the remaining cable rack (3) are provided with an insulating structure that enables them to be insulated and installed on the tower (4), and also includes several for The OPGW (5) is insulated down from the top of the tower along the pole tower (4) so as to access the OPGW down-lead insulation support (2) of the junction box (1) or the remaining cable rack (3). 2. The splicing device suitable for the subsection point of optical fiber composite overhead ground wire according to claim 1, characterized in that, the splicing box includes a splicing upper box (1.1), a splicing lower box (1.2), an inner axial An isolation insulator (1.3) with an optical fiber segment (1.4) preset, the upper and lower connecting boxes (1.1) and lower connecting boxes (1.2) are arranged symmetrically up and down, and are respectively connected to both ends of the isolation insulator (1.3) , the two ends of the optical fiber section inside the isolation insulator (1.3) extend into the inside of the upper connection box (1.1) and the lower connection box (1.2) respectively, and the upper connection box (1.1) and the lower connection box (1.2) An optical fiber (5.1) used to lead the OPGW (5) into the interior of the connection upper box (1.1) or the connection lower box (1.2) is respectively installed so as to be connected to the fiber section (1.4) inside the isolation insulator (1.3) The welding fixture (1.5), the insulation structure on the connection box (1) is an insulation base (1.6) installed on the bottom surface of the connection box (1.2). 3. The splicing device suitable for the segment point of optical fiber composite overhead ground wire according to claim 2, characterized in that, the OPGW down-lead insulation support (2) includes an insulation support plate (2.1) for insulating The support plate (2.1) is fixed to the insulation support plate fasteners (2.2) on the pole tower (4), and the OPGW fasteners (2.3) are vertically arranged on the surface of the insulation support plate (2.1). 4. The splicing device suitable for the subsection point of optical fiber composite overhead ground wire according to claim 3, characterized in that, the insulation structure on the remaining cable rack (3) is set on the back of it to insulate it The remaining cable frame insulation support (3.2) installed on the pole tower (4).

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