A fiber core connection structure for sharing a large number of cores in OPGW

Abstract

The present invention relates to a fiber core connection method and structure for sharing a large number of cores of OPGW, including a direct-melt OPGW connection box and a plug-in OPGW connection box that can be detachably connected together; an OPGW fusion unit is installed in the direct-melt OPGW connection box, and an OPGW plug-in unit is installed in the plug-in OPGW connection box, which divides the fiber core of the large number of cores of OPGW on the connection point of the power tower equipped with emerging business communication equipment into two parts, one part of the fiber core adopts a direct fusion method, and is connected in sections to form a long-distance trunk OPGW transmission long channel, and the other part of the fiber core adopts a plug-in connection method to form a segmented interval optical fiber transmission short channel. The present invention can meet the flexible use of interval OPGW communication according to the special requirements of emerging businesses, greatly improve the utilization rate of large number of cores of OPGW, has strong practicality, and produces huge economic and social benefits.

Description

Technical Field

[0001] The invention relates to a fiber core connection structure for sharing a large number of cores of an OPGW. Background Art

[0002] For a long time, traditional OPGW has been mainly responsible for transmitting real-time information on power grid operation such as power system relay protection and dispatching automation, as well as communication business information such as power supply and consumption marketing, administrative command management, and information communication.

[0003] With the advancement of the strategic goal of "building an internationally leading energy internet with Chinese characteristics", with a strong smart grid as the basic platform, we will strengthen network interconnection and the continuous promotion and application of advanced information, communication and control technologies. In the field of intelligent operation and maintenance of high-voltage transmission lines, the OPGW optical fiber communication channel will transmit the transmission line operation status monitoring information, forest fire monitoring where the transmission line towers are located, environmental monitoring and other information to the monitoring and diagnosis operation and maintenance center, providing communication technology support for comprehensive analysis and diagnosis.

[0004] my country's power system transmission towers are spread all over the country, with more than one million kilometers of overhead transmission lines in operation and more than 3 million poles and towers. The pole and tower resources of some transmission lines meet the technical requirements for the deployment and installation of 5G communication base stations. With the formation of a cooperative model of co-construction and sharing of resources between the power and communication industries, 5G communication base stations are installed on transmission line towers. The OPGW fiber channel provides a communication channel from the 5G base station to the central station, realizing the sharing of pole and tower resources. With the continuous expansion of the demand for optical fiber communication transmission of emerging businesses, the number of OPGW cores will be expanded from the traditional 24 cores to more than 72 cores to meet the optical fiber transmission needs of various new communication businesses.

[0005] The existing OPGW fiber optic channels are continuously extended along the transmission lines, forming a continuous length of several kilometers to hundreds or even thousands of kilometers between substations, with full-core fusion and point-to-point transmission. They are put into operation simultaneously with the transmission lines, transmitting important information such as the safe and stable operation of the power grid. When it is necessary to access new services in the large-core OPGW in operation, the transmission line must be shut down to disconnect and transform the OPGW to extract optical fiber to access the communication equipment of the new business. The power outage after the transmission line is put into operation will change the operation mode of the power system, affecting the lives of residents, industrial production and the safety of the power grid. The power outage technology is difficult, the economic cost is high, and the social impact is great. At the same time, the change of the OPGW optical fiber operation mode affects a large range of communication networks, the construction work time is long, and the possibility of approving the interruption of optical fiber for transformation is rare.

[0006] With the breakthrough of large-core OPGW manufacturing technology and the construction of 5G shared iron towers and power Internet of Things, large-core OPGW will be widely promoted and used. However, the connection point location setting method and optical fiber connection method of existing transmission line OPGW are difficult to meet the needs of optical fiber communication for applications such as mounting communication 5G base stations on transmission towers, power Internet of Things and online monitoring of the operation status of power transmission lines, and auxiliary video monitoring. This will seriously restrict the actual application effect of large-core OPGW, resulting in a waste of investment in large-core OPGW. At the same time, it will greatly increase the engineering cost of emerging businesses such as 5G shared iron towers, power Internet of Things and online monitoring of transmission lines, restrict the development of emerging businesses, and fail to achieve the expected economic and social benefits. Summary of the invention

[0007] In view of this, the purpose of the present invention is to provide a core connection structure for a shared large-core OPGW that is flexible in use and highly practical, which greatly improves the utilization rate of the large-core OPGW and provides a convenient, reliable and economical fiber optic channel for emerging businesses such as 5G shared towers, power Internet of Things and online monitoring of transmission lines.

[0008] The present invention is implemented by the following scheme: a method for connecting the cores of a shared large-core OPGW. When constructing or renovating a transmission line and an OPGW, the cores of the large-core OPGW on the connecting point of the power tower equipped with the emerging business communication equipment are divided into two: one part of the cores adopts a direct fusion method, and is connected in sections to form a long-distance point-to-point OPGW transmission long channel; the other part of the cores adopts a plug-in connection method to form a segmented interval optical fiber transmission short channel. When the emerging business communication equipment on the power tower needs to access the OPGW transmission optical fiber, the required number of OPGW cores are extracted and connected to the optical interface of the emerging business communication equipment on the power tower to provide an optical fiber channel for the emerging business; the unused part of the core maintains a full-length plug-in connection method as a backup optical fiber channel for long-distance trunk communication transmission.

[0009] Furthermore, the number of fiber cores using direct fusion splicing accounts for approximately 75-85% of the total number of OPGW cores.

[0010] Another technical solution of the present invention: a core splicing structure of a shared large-core-count OPGW, comprising a direct-melt OPGW splicing box and a plug-in OPGW splicing box that are separated or combined and connected together; an OPGW fusion unit is installed in the direct-melt OPGW splicing box, and an OPGW plug-in unit is installed in the plug-in OPGW splicing box.

[0011] Furthermore, the direct-fusion OPGW junction box includes a base plate with a wire outlet hole and a cover shell covering the base plate, the upper part of the cover shell is hemispherical, the OPGW welding unit is connected to the base plate through a bracket, and the base plate is provided with screw holes for connecting the pluggable OPGW junction box by screws.

[0012] Furthermore, the lower edge of the cover shell has an outwardly folded flange, and the upper side of the bottom plate is located at the periphery of the cover shell and is connected by screws with multiple pressing blocks 160 for pressing the flange; the bottom plate is provided with holes for connecting the direct-melt OPGW junction box and the plug-in OPGW junction box.

[0013] Furthermore, the pluggable OPGW junction box includes a shell with a through hole at the bottom and an open top, and a removable box cover covering the shell. The shell of the pluggable OPGW junction box is square, and a connecting part for connecting the box cover or the bottom plate of the direct-melt OPGW junction box is provided on the outer edge of the upper end of the shell, and a threaded hole is provided on the connecting part.

[0014] Furthermore, a door is provided on one side of the shell.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention realizes dividing the large-core-count OPGW on the connection point of the power pole tower equipped with emerging business communication equipment into two, most of the fiber cores are directly fixed and fused into a long-distance point-to-point power optical fiber transmission channel, and a small part of the fiber cores are fused into a plug-in connection method, which can meet the flexible use of interval OPGW communication according to the special requirements of emerging businesses, solves the long-standing communication and transmission problems of emerging businesses such as 5G shared towers, power Internet of Things and online monitoring of transmission lines located in high and steep mountains, and at the same time greatly improves the utilization rate of large-core-count OPGW, has strong practicality, and has produced huge economic and social benefits.

[0016] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through specific embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a direct-fusible OPGW junction box according to an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of a pluggable OPGW junction box according to an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the combined structure of a direct-fusible OPGW junction box and a pluggable OPGW junction box according to an embodiment of the present invention;

[0020] Figure 4 It is a 220KV circuit diagram of a specific application case in an embodiment of the present invention;

[0021] Explanation of the numbers in the figure: 100 - direct-fusion OPGW junction box, 110 - OPGW fusion unit, 120 - cover, 130 - bracket, 140 - outlet hole, 150 - bottom plate, 160 - pressure block, 200 - pluggable OPGW junction box, 210 - OPGW plug-in unit, 220 - shell, 230 - box cover, 240 - connection part, 250 - fixing bolt. DETAILED DESCRIPTION

[0022] A method for sharing the core connection of a large-core OPGW. During the construction or renovation of transmission lines and OPGW, the core of a large-core OPGW on the connection point of a power tower equipped with emerging business communication equipment (such as smart transmission line operation status monitoring equipment, 5G communication base station equipment, and power Internet of Things equipment) is divided into two. One part of the core is directly fused and connected in sections to form a long-distance point-to-point OPGW transmission channel, which continues to transmit real-time information on power grid operation such as power system relay protection and dispatching automation, and power plant safety and stability control signals, as well as major communication services such as power supply and marketing, administrative command management, and information systems. After the direct fusion-type long-distance OPGW transmission channel is put into operation, Except for the construction of power transmission and transformation projects that disconnect high-voltage transmission lines or "T-connect" them to new lines and substations, the OPGW operation mode will not be changed under normal circumstances; the other part of the fiber cores adopts a plug-in connection method to form a segmented interval optical fiber transmission short channel. When the emerging business communication equipment on the power pole tower needs to adopt OPGW optical fiber transmission, the OPGW fiber core is extracted and connected to the optical interface of the emerging business communication equipment on the power pole tower, so as to flexibly realize the safe and reliable transmission of emerging businesses through a large number of OPGW cores. After the emerging business information is transmitted to the nearest substation, it is transmitted to the corresponding processing center through the existing communication network; the unused part of the fiber core maintains a full plug-in connection method as a backup optical fiber channel for long-distance trunk communication transmission.

[0023] In this embodiment, the number of fiber cores using direct fusion splicing accounts for approximately 75% to 85% of the total number of OPGW cores; OPGW uses 12 cores as a base number as an optical unit. Taking a 72-core OPGW with a large core number as an example, 60 cores are extracted and directly fused to form a long-distance point-to-point OPGW transmission channel as a dedicated optical fiber channel for power communication. One optical unit, i.e. 12 cores, is extracted and fused at both ends into a plug-in connector to form a segmented interval optical fiber transmission short channel, thereby realizing the interval transmission of emerging services within the large-core OPGW.

[0024] like Figures 1 to 3As shown, a core connection structure of a shared large core number OPGW is applied to the above-mentioned core connection method of a shared large core number OPGW, including a direct-melt OPGW connection box and a plug-in OPGW connection box that are separated or combined and connected together; an OPGW fusion unit 110 is installed in the direct-melt OPGW connection box 100, and an OPGW plug-in unit 210 is installed in the plug-in OPGW connection box 200; the core connection structure of the present invention is applied to the transmission line and OPGW construction When installing, the large-core OPGW on the connection point of the power pole tower equipped with emerging business communication equipment is divided into two parts. Most of the fiber cores are directly fixed and fused to form a long-distance point-to-point power optical fiber transmission channel, and a small part of the fiber cores adopt plug-in connection method, which can meet the flexible use of interval OPGW communication according to the special requirements of emerging businesses; the direct-fusion OPGW connection box and the plug-in OPGW connection box can be used independently or in combination. The overall width of the direct-fusion OPGW connection box is greater than the overall width of the plug-in OPGW connection box.

[0025] The number of fiber cores directly spliced ​​by direct-fusion OPGW splicing boxes accounts for about 80% of the total number of OPGW cores. Through the direct-fusion OPGW splicing boxes, they are segmented and spliced ​​to form long-distance point-to-point OPGW transmission channels along the transmission lines, which continue to transmit real-time information on power grid operation such as power system relay protection and dispatching automation, safety and stability control signals of power plants, as well as major communication services such as power supply and marketing, administrative command and management. After the directly fused fixed long-distance OPGW optical fiber transmission channel is put into operation, except for disconnecting the high-voltage transmission line and "T-connecting" it to the newly built line and substation as the transmission and transformation project is constructed, the OPGW operation mode will not be changed under normal circumstances.

[0026] The number of fiber cores using the plug-in OPGW splicing box accounts for about 20% of the total number of OPGW cores; the two ends of each fiber core are fused into a plug-in splicing head, and through the plug-in OPGW splicing box, a segmented interval optical fiber transmission short channel is formed; under normal circumstances, some unused fiber cores maintain full plug-in connection and can be used as backup optical fiber channels for long-distance communication transmission networks; when the line tower is equipped with smart transmission line operation status monitoring equipment, 5G communication base station equipment, and power Internet of Things perception terminals, and OPGW optical fiber transmission is required, the plug-in splicing head will be extended and connected to the optical interface of the communication equipment on the power tower, so as to flexibly realize the safe and reliable interval transmission of emerging services within the large-core OPGW. After the emerging business information is transmitted to the nearest substation, the information is transmitted to the corresponding processing center through the existing communication network, creatively solving the long-standing problem of communication transmission of 5G communication base stations, transmission line monitoring, and power Internet of Things in the high-voltage transmission line corridors located in high mountains. At the same time, it greatly improves the utilization rate of large-core OPGW, reduces project costs, has extremely strong practicality, and has generated huge economic and social benefits.

[0027] In this embodiment, the direct-melt OPGW junction box 100 includes a bottom plate 150 with a wire outlet hole and a cover shell 120 covering the bottom plate 150. The upper part of the cover shell 120 is hemispherical, and the internal space of the cover shell meets the requirements of installing 2×72 core fusion units on both sides. The OPGW fusion unit is connected to the bottom plate 150 through a bracket 130. The upper end of the bracket 130 is connected to the OPGW fusion unit by bolts, and the lower end of the bracket 130 is connected to the bottom plate 150 by bolts. Screw holes for connecting the pluggable OPGW junction box by screws are opened on the bottom plate, and the positions of the screw holes correspond to the positions of the threaded holes on the pluggable OPGW junction box 200.

[0028] In this embodiment, the lower edge of the cover shell 120 has an outwardly folded flange, and the upper side of the base plate 150 is located at the periphery of the cover shell and is connected by screws with a plurality of pressure blocks 160 for pressing the flange, thereby realizing a detachable connection between the cover shell 120 and the base plate 150; the base plate 150 is provided with a hole for connecting the direct-melt OPGW junction box and the plug-in OPGW junction box.

[0029] In the present embodiment, the plug-in OPGW junction box 200 includes a shell 220 with a through hole at the bottom and an open top, and a detachable box cover 230 covering the shell 220. The shell of the plug-in OPGW junction box is square, and the internal space of the shell is sufficient to install 2×12 plug-in units 210. The outer edge of the upper end of the shell is provided with a connecting portion 240 for connecting the box cover 230 or the bottom plate 150 of the direct-melt OPGW junction box 100, and a threaded hole is provided on the connecting portion. The edge of the box cover has a folded edge extending outward, and the folded edge has screw holes corresponding to the threaded holes of the connecting portion 240 on the shell, and the box cover is connected to the shell by screws; when the plug-in OPGW junction box is used independently, the box cover needs to be installed to play a role in rain protection. When the direct-melt OPGW junction box and the plug-in OPGW junction box need to be combined together, the box cover is removed, and the shell of the plug-in OPGW junction box is directly installed on the lower side of the direct-melt OPGW junction box.

[0030] In this embodiment, fixing bolts 250 for mounting the pluggable OPGW junction box on the power pole tower are provided at the bottom of the housing 220 .

[0031] In this embodiment, a door (not shown in the figure) is provided on one side of the shell. Opening the door facilitates the connection between the OPGW plug-in unit 210 and the optical fiber. The opening method and opening direction of the door should meet the requirements of flexible plugging and unplugging of the fiber core; the arrangement of the outlet holes, through holes, screw holes, and holes on the direct-melt OPGW splicing box and the plug-in OPGW splicing box must meet the sealing requirements such as rain and dustproof in the outdoor use environment.

[0032] Specific implementation application cases: Figure 4 As shown in the figure, according to the layout planning of the online monitoring of the operation status of the smart transmission line and the comprehensive monitoring equipment for environmental safety, it is necessary to hang the video device for monitoring the environment and forest fire safety of the transmission line and its signal communication transmission equipment on the 57# tower of the 220KV line of a newly built power transmission and transformation project, and transmit the monitoring information on the line to the nearest substation through OPGW optical fiber communication, and then upload the monitoring information on the line to the power transmission and transformation equipment status emergency diagnosis center (OMDS) through the substation communication network.

[0033] The project design uses a large-core OPGW with 72 cores. When designing the connection points, the OPGW connection points are first designed and arranged on the 57# tension tower according to the monitoring needs of the smart transmission line. A 60-core direct-fusible OPGW connection box is configured (that is, there is a 60-core OPGW fusion unit in the direct-fusible OPGW connection box) and a 12-core plug-in OPGW connection box (that is, there is a 12-core OPGW plug-in unit in the plug-in OPGW connection box).

[0034] A 60-core direct-fusion OPGW junction box was installed, and through multiple welding of 60-core fixed junction boxes at multiple junction points along the transmission line, a 60-core large-capacity, two-substation-to-point OPGW optical fiber dedicated transmission channel for the power system with a total length of about 36 kilometers was formed, which maintained the transmission of traditional transmission line relay protection, power plant safety and stability control, dispatching automation and other real-time power grid operation information and power supply and marketing, production command, administrative management, information systems and other power grid-specific communication services.

[0035] The installed 12-core plug-in junction box extracts a 2-core OPGW and inserts it into the optical interface of the communication transmission equipment of the power transmission line security monitoring video device on the 57# tower, sharing the optical fiber resources of the large-core OPGW to form an OPGW monitoring signal channel for about 12 kilometers from the 57# tower to the B substation, realizing the communication transmission of the dedicated optical fiber channel for smart transmission line monitoring signals.

[0036] Other 10-core plug-in OPGWs can be used to form interval optical fiber transmission channels for emerging business information through simple plug-in methods according to the requirements of emerging businesses. They can also be used as backup OPGW transmission channels for long-distance power-dedicated communication networks.

[0037] Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0038] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integrated molding using a casting process) (except when it is obviously impossible to use an integrated molding process).

[0039] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the present invention include states or shapes that are approximate, similar, or close to them.

[0040] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A fiber core connection structure for sharing a large number of cores of an OPGW, characterized in that: It includes a direct-melt OPGW splicing box and a plug-in OPGW splicing box which are separated or combined and connected together; the direct-melt OPGW splicing box is equipped with an OPGW splicing unit, and the plug-in OPGW splicing box is equipped with an OPGW plug-in unit, wherein: The direct-melting OPGW junction box comprises a bottom plate with a wire outlet hole and a cover shell covering the bottom plate, the upper part of the cover shell is hemispherical, the OPGW welding unit is connected to the bottom plate through a bracket, the upper end of the bracket is connected to the OPGW welding unit through bolts, the lower end of the bracket is connected to the bottom plate through bolts, and the bottom plate is provided with screw holes for connecting the pluggable OPGW junction box through screws; The lower edge of the housing has an outwardly folded flange, and the upper side of the bottom plate is located at the periphery of the housing and is connected to a plurality of pressing blocks for pressing the flange by screws; the bottom plate is provided with a hole for connecting the direct-melt OPGW junction box and the plug-in OPGW junction box; The plug-in OPGW junction box includes a shell with a through hole at the bottom and an open top, and a detachable box cover covering the shell. The shell of the plug-in OPGW junction box is square, and a connecting part for connecting the box cover or the bottom plate of the direct-melt OPGW junction box is provided on the outer edge of the upper end of the shell. A threaded hole is provided on the connecting part, and fixing bolts for mounting the plug-in OPGW junction box on a power pole tower are provided at the bottom of the shell.

2. The fiber core connection structure of the shared large core number OPGW according to claim 1, characterized in that: A door is arranged on one side of the shell.

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