Transmission line straight tower OPGW connection point deployment structure and method

Abstract

The present invention relates to a transmission line straight pole tower OPGW connection point deployment structure and method, including an OPGW connection box and a triangular connecting plate, the triangular connecting plate is in the shape of an isosceles triangle, the top corner of the triangular connecting plate is hung on the cross arm of the straight pole tower, the OPGW optical cables on both sides are hung on the two bottom corners of the triangular connecting plate, the OPGW optical cables on both sides are led down to the lower part of the straight pole tower and connected through the OPGW connection box, and the OPGW connection box is connected to the emerging business communication equipment installed on the straight pole tower through the branching optical cable. The present invention achieves a technical breakthrough in deploying OPGW connection points and installing OPGW connection boxes on straight pole towers, meets the needs of emerging businesses to access OPGW optical fibers, can meet the flexible use of interval OPGW communication according to the special requirements of emerging businesses, greatly improves the utilization rate of large-core OPGW, has strong practicality, and produces huge economic and social benefits.

Description

Technical Field

[0001] The invention relates to a transmission line straight pole tower OPGW connection point deployment structure and method. Background Art

[0002] The types of pole towers for high-voltage transmission lines are mainly divided into two types: straight pole towers and tension pole towers. The straight pole towers are designed to withstand only vertical loads and horizontal loads caused by wind, and cannot withstand large lateral unbalanced tension. Straight pole towers account for the majority of the entire line. According to the existing engineering design standards, it is generally impossible to select straight pole towers as OPGW connection points for the deployment and installation of fiber optic splicing boxes, and OPGW optical fibers cannot access emerging services.

[0003] In terms of force design, the tension tower can withstand not only vertical loads and horizontal loads caused by wind, but also large lateral loads. In simple terms, the tension tower can withstand large unbalanced tension on both sides of the line. When a line on one side of the tension tower is disconnected, the tension tower can withstand the tension of the conductor on the other side without collapsing the tower, thus avoiding domino-like continuous tower collapse and line disconnection accidents, and reducing the scope of transmission line accidents.

[0004] Between two tension towers, there are several straight pole towers forming a tension section. In terms of engineering design, according to factors such as OPGW manufacturing technology, transmission line voltage level, distribution panel weight and construction and transportation conditions, the distribution panel is usually made in a length of 3-5 kilometers. It is only necessary to accumulate several tension sections within a length of 3-5 kilometers to form a fiber splicing section. The splicing point is arranged on the tension tower, and the OPGW splicing box is installed. No other factors need to be considered when selecting the OPGW splicing point.

[0005] With the advancement of the strategic goal of "internationally leading energy Internet with Chinese characteristics" based on a strong smart grid platform and the application of network interconnection and advanced information, communication and control technologies, there will be smart transmission line operation status monitoring devices, intelligent sensing terminals and communication equipment, 5G communication network base stations, etc. hung on the transmission line towers. There is an urgent need for large-capacity, highly reliable, low-cost and easy-to-build communication channels. It is very necessary to make full use of the safe and convenient access of large-core OPGW of transmission lines to the towers to provide safe, reliable, economical and practical fiber optic channels for various emerging businesses.

[0006] When it is necessary to access new services in the operating OPGW with a large number of cores, the transmission line must be shut down to disconnect and transform the OPGW to extract the optical fiber to access the communication equipment of the new business. The power outage after the transmission line is put into operation changes the operation mode of the power system and affects the lives of residents, industrial production and power grid safety. 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.

[0007] In addition, due to the vigorous development of emerging businesses such as smart transmission line status monitoring system devices, intelligent sensing terminals and 5G communication network base stations, according to the characteristics of their respective businesses, the hanging equipment is installed on the transmission line towers (tension towers or straight towers) according to actual needs. However, the existing straight towers do not have OPGW connection points, and it is impossible to extract optical fiber access communication equipment to form an optical communication transmission network, and the expected optical fiber transmission goal cannot be achieved.

[0008] The investment in updating and transforming straight pole towers of high-voltage transmission lines into tension towers is large (the construction cost of each tower ranges from hundreds of thousands to millions of yuan), the construction time is long, the impact of power outages is large, the implementation is difficult, and the economic and social benefits are low. Summary of the invention

[0009] In view of this, the purpose of the present invention is to provide a transmission line straight pole tower OPGW connection point deployment structure and method with strong practicality and low investment cost, making full use of the high reliability and low cost optical fiber resources of large core number OPGW, and providing convenient, economical and reliable communication channels for new services such as 5G communication base stations, power Internet of Things, intelligent monitoring, and intelligent sensing terminals.

[0010] The present invention is implemented by the following scheme: an OPGW connection point deployment structure of a transmission line straight pole tower, comprising an OPGW connection box installed at the bottom of the straight pole tower and a triangular connecting plate installed at the top of the straight pole tower for hanging OPGW optical cables, the triangular connecting plate is in the shape of an isosceles triangle, the top corner of the triangular connecting plate is hung on the cross arm of the straight pole tower through optical cable hanging point hardware, the OPGW optical cables on both sides are respectively hung on the two bottom corners of the triangular connecting plate through optical cable pre-hinged hardware, the OPGW optical cables on both sides are led down to the bottom of the straight pole tower and connected through the OPGW connection box, and the OPGW connection box is connected to the emerging business communication equipment installed on the straight pole tower through the branch optical cable.

[0011] Furthermore, the top corner and two bottom corners of the triangular connecting plate have chamfered corners, and the top corner and two bottom corners of the triangular connecting plate are provided with connection holes for connecting optical cable hanging point hardware and optical cable pre-hinged hardware respectively at the center of the chamfered corners.

[0012] Furthermore, the OPGW splicing box includes a direct-fusion OPGW splicing box and a plug-in OPGW splicing box that are combined and connected together. The plug-in OPGW splicing box is connected to the emerging business communication equipment through an optical cable, a part of the fiber cores of the OPGW optical cables on both sides are connected through the direct-fusion OPGW splicing box, and the other fiber cores and the fiber cores of the branch optical cables are connected through the plug-in OPGW splicing box; an OPGW fusion unit is installed in the direct-fusion OPGW splicing box, and an OPGW plug-in unit is installed in the plug-in OPGW splicing box.

[0013] Furthermore, the direct-melt 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 plug-in OPGW junction box by screws; the plug-in OPGW junction box includes a shell with a through hole at the bottom and an open top, the shell of the plug-in OPGW junction box is square, and a connecting part connected to the base 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, the lower edge of the cover shell has an outwardly folded flange, and the upper side of the base plate is located at the periphery of the cover shell and is connected by screws with a plurality of pressure blocks for pressing the flange; a hole is opened on the base plate for connecting the direct-melt OPGW junction box and the plug-in OPGW junction box; and a door is provided on one side of the shell.

[0015] Another technical solution of the present invention: A method for deploying the OPGW connection point deployment structure of the linear tower of a power transmission line as described above, comprising the following steps: (1) setting a break point on the OPGW optical cable at the linear tower, hanging the top corner of the triangular connecting plate on the cross arm of the linear tower through the optical cable hanging point hardware, and hanging the OPGW optical cables on both sides on the two bottom corners of the triangular connecting plate through the optical cable pre-hinged hardware; (2) leading the OPGW optical cables on both sides down along the main material of the tower leg of the linear tower to the lower part of the linear tower, and connecting to the OPGW connection box; (3) dividing the core of the OPGW optical cable into two: one Part of the fiber cores are connected to the direct-fusion OPGW splicing box and directly fixed and fused into a long-distance trunk power optical fiber transmission channel; it serves as the original trunk communication network channel; the required number of OPGW fiber cores are first extracted from the other part of the fiber cores, and the cores of the branch optical cable are plugged in and spliced ​​through a plug-in OPGW splicing box, and then the branch optical cable is connected to the optical interface of the emerging business communication equipment on the straight pole tower, as an emerging business communication channel; the remaining unused fiber cores in the other part of the fiber cores are also plugged in and spliced ​​through a plug-in OPGW splicing box; it serves as a backup channel for trunk communication or emerging business communication.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the present invention achieves a technical breakthrough in deploying OPGW connection points and installing OPGW connection boxes on straight pole towers, meeting the needs of emerging services such as 5G communication base stations, power Internet of Things, intelligent sensing terminals, and intelligent monitoring for access to OPGW optical fibers. According to the special requirements of emerging services, it can not only ensure the needs of the original backbone communication network, but also realize the flexible use of interval OPGW communication, greatly improving the utilization rate of large-core OPGW, providing a reliable, economical and convenient communication channel for emerging business communications on straight towers, and generating huge economic and social benefits.

[0017] 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

[0018] Figure 1 It is a schematic diagram of the OPGW connection point deployment structure according to an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the connection of triangular connecting plates in an embodiment of the present invention;

[0020] Figure 3 2 is a schematic diagram of a triangular connecting plate structure in an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of an OPGW junction box in an embodiment of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of a pluggable OPGW junction box in an embodiment of the present invention;

[0023] Figure 6 It is a 220KV circuit diagram of a specific application case in an embodiment of the present invention;

[0024] Explanation of numbers in the figure: 100-direct-fusion OPGW junction box, 110-OPGW fusion unit, 120-cover, 130-bracket, 140-cable outlet, 150-base plate, 160-pressure block, 200-pluggable OPGW junction box, 210-OPGW plug-in unit, 220-housing, 230-connecting part, 240-fixing bolt, 300-straight pole tower, 310-cross arm, 400-triangular connecting plate, 500-optical cable hanging point fittings, 600-optical cable pre-hinged fittings, 700-OPGW optical cable, 800-emerging business communication equipment. DETAILED DESCRIPTION

[0025] like Figures 1 to 5As shown, an OPGW connection point deployment structure of a transmission line straight pole tower includes an OPGW connection box installed at the bottom of the straight pole tower 100 and a triangular connecting plate 400 installed at the top of the straight pole tower for hanging OPGW optical cables, wherein the triangular connecting plate 400 is in the shape of an isosceles triangle, and the top corner of the triangular connecting plate 400 is hung on the cross arm of the straight pole tower through an optical cable hanging point hardware 500, and the OPGW optical cables on both sides are respectively hung on the two bottom corners of the triangular connecting plate 400 through optical cable pre-hinged hardware 600, and the OPGW optical cables on both sides are led down to the bottom of the straight pole tower and connected through the OPGW connection box, and the OPGW connection box is connected to the emerging business communication equipment 800 installed on the straight pole tower through a branch optical cable, and the branch optical cable can be an ordinary optical cable. Since the load of OPGW only accounts for a small part of the transmission line, the present invention achieves a technological breakthrough in deploying OPGW connection points and installing OPGW connection boxes on straight poles and towers through simple technical transformation without changing the overall stress of the straight poles and towers of the transmission line in operation, thereby meeting the needs of emerging services for accessing OPGW optical fibers, having strong practicality and huge economic and social benefits.

[0026] In this embodiment, the top corner and two bottom corners of the triangular connecting plate 400 have chamfered corners, and the top corner and two bottom corners of the triangular connecting plate 400 are provided with connecting holes for connecting hardware at the center of the chamfered corners; the diameter of the connecting hole is 18 mm, the radius of the chamfer is 36 mm, the center distance between the connecting holes on the two bottom corners is 450 mm, and the height difference between the top foot connecting hole and the bottom corner connecting hole is 120 mm.

[0027] In this embodiment, the OPGW splicing box includes a direct-fusion OPGW splicing box and a plug-in OPGW splicing box which are combined and connected together. The plug-in OPGW splicing box is connected to the emerging business communication equipment through an optical cable. A part of the fiber cores of the OPGW optical cables on both sides are connected through the direct-fusion OPGW splicing box, and the other fiber cores and the fiber cores of the branch optical cables are connected through the plug-in OPGW splicing box; an OPGW fusion unit is installed in the direct-fusion OPGW splicing box, and an OPGW plug-in unit is installed in the plug-in OPGW splicing box; the large-core OPGW on the straight pole tower carrying the emerging business communication equipment is divided into two, and a part of the fiber cores (about 80% of the total number of cores) are directly fixed and fused into the long-distance trunk power optical fiber transmission channel, which continues to bear the responsibility of transmitting the power system. The other part (about 20% of the total number of cores) of the fiber cores adopts plug-in connection, and then the required number of OPGW fiber cores are extracted to connect with the optical interface of the emerging business communication equipment on the straight pole tower, so as to flexibly realize the safe and reliable interval transmission of emerging businesses in the large number of OPGW cores. After the emerging business information is transmitted to the nearest substation, the information is transmitted to the processing center through the existing communication network or ordinary optical cable, which can meet the flexible use of interval OPGW communication according to the special requirements of emerging businesses. The unused part of the fiber cores maintains the full plug-in connection mode, which serves as a backup optical fiber channel for the backbone communication network and emerging business communication channel.

[0028] OPGW uses 12 cores as a base as an optical unit. Taking the 72-core OPGW as an example, 60 cores are extracted and directly spliced ​​through the direct-fusion OPGW splicing box to form a long-distance trunk OPGW transmission channel as the optical fiber channel of the power communication network. Extract one optical unit, that is, 12 cores, and use the plug-in splicing method through the plug-in OPGW splicing box. The two ends are fused into plug-in splicing heads to form a segmented interval optical fiber transmission short channel to achieve the interval transmission of emerging services in the large-core OPGW. From this part of the fiber cores using the plug-in splicing method, several fiber cores are extracted (specifically selected according to the number of optical interfaces on the emerging business communication equipment) and plug-in spliced ​​with the cores of the tap cable. Then the tap cable is connected to the optical interface on the emerging business communication equipment, so as to flexibly achieve safe and reliable interval transmission of emerging services in the large-core OPGW.

[0029] In the present embodiment, the overall width of the direct-melt OPGW splicing box is greater than the overall width of the plug-in OPGW splicing box. The direct-melt OPGW splicing 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 fusion unit is connected to the base plate through a bracket, 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 base plate 150 by bolts. The base plate is provided with screw holes for connecting the plug-in OPGW splicing box by screws. The plug-in OPGW splicing box includes a shell with a through hole at the bottom and an open top. The shell of the plug-in OPGW splicing box is square, and a connecting portion 230 connected to the base plate of the direct-melt OPGW splicing box is provided on the outer edge of the upper end of the shell. A threaded hole is provided on the connecting portion, and the position of the screw hole on the base plate 150 corresponds to the position of the threaded hole on the connecting portion of the plug-in OPGW splicing box 200.

[0030] 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, so as to realize a detachable connection between the cover shell 120 and the base plate 150; the base plate 150 is provided with holes for communicating the direct-melt OPGW splicing box and the plug-in OPGW splicing box; a door is provided on one side of the shell, and 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 of the outdoor use environment such as rainproof and dustproof, and the bottom of the shell 220 is provided with fixing bolts 240 for installing the plug-in OPGW splicing box on a straight pole tower.

[0031] Specific implementation application cases: Figure 6 As shown, when carrying out the technical transformation of smart line intelligent operation and maintenance on the 220KV Zhongcheng transmission line, it is necessary to install video security monitoring devices and their communication transmission equipment in both directions as emerging business communication equipment on the 26# straight pole tower with a relatively wide field of view and located near the commanding point of the transmission line corridor. However, this straight pole tower is not an OPGW connection point, and the optical fiber cannot be extracted without a junction box.

[0032] The OPGW of the 26# straight pole tower was disconnected and reconstructed by using a "triangle connecting plate", and a new OPGW splicing box was added to the 26# straight pole tower. Both ends of the disconnected OPGW were simultaneously led down and connected to the OPGW splicing box. Most of the fiber cores were directly connected through the direct-melt OPGW splicing box, and a small part of the fiber cores were plugged in through the plug-in OPGW splicing box. Two OPGW cores were extracted from the small part of the fiber cores and plugged in with the fiber cores of the two branch optical cables. The two branch optical cables were then connected to the optical interfaces of the communication transmission equipment of the two intelligent line video monitoring and surveillance devices, and the intelligent transmission line monitoring information was transmitted to the transmission line operation status monitoring and diagnosis center safely, reliably, and quickly in real time through the OPGW optical fiber and the communication network of the substations on both sides.

[0033] A method for deploying the OPGW connection point deployment structure of a linear tower of a power transmission line as described above comprises the following steps: (1) setting a disconnection point for the OPGW optical cable at the linear tower, hanging the top corner of the triangular connecting plate on the cross arm of the linear tower through the optical cable hanging point hardware, and hanging the OPGW optical cables on both sides on the two bottom corners of the triangular connecting plate through the optical cable pre-hinged hardware; (2) leading the OPGW optical cables on both sides down along the main material of the tower leg of the linear tower to the lower part of the linear tower, and connecting to the OPGW connection box; (3) dividing the fiber core of the OPGW optical cable into two, and a part (about 80% of the total number of cores) The fiber cores are connected to the direct-fusion OPGW splicing box to directly fix and fusion-splice into a long-distance point-to-point power optical fiber transmission channel. The required number of OPGW fiber cores are first extracted from the other part of the fiber cores (about 20% of the total number of cores) and the cores of the branch optical cable are plugged in and spliced ​​through the plug-in OPGW splicing box. Then the branch optical cable is connected to the optical interface of the emerging business communication equipment on the straight pole tower. The remaining unused fiber cores in the other part of the fiber cores (about 20% of the total number of cores) are also plugged in and spliced ​​through the plug-in OPGW splicing box to serve as backup optical fiber channels for the backbone communication network and emerging business communication channels.

[0034] 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.

[0035] 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).

[0036] 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.

[0037] 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.

[0038] 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 transmission line straight pole tower OPGW connection point deployment structure, characterized by: It includes an OPGW junction box installed at the bottom of the linear tower and a triangular connecting plate installed at the top of the linear tower for hanging OPGW optical cables. The triangular connecting plate is in the shape of an isosceles triangle. The top corner and two bottom corners of the triangular connecting plate have chamfered corners. The top corner and two bottom corners of the triangular connecting plate are located at the center of the chamfered corners and are provided with connection holes for connecting optical cable hanging point hardware and optical cable pre-hinged hardware respectively. The top corner of the triangular connecting plate is hung on the cross arm of the linear tower through the optical cable hanging point hardware. The OPGW optical cables on both sides of the linear tower are respectively hung on the two bottom corners of the triangular connecting plate through the optical cable pre-hinged hardware. The OPGW optical cables on both sides are led down to the bottom of the linear tower and connected through the OPGW junction box. The OPGW junction box is connected to the emerging business communication equipment installed on the linear tower through the branch optical cable, wherein: The OPGW splicing box comprises a direct-fusion OPGW splicing box and a plug-in OPGW splicing box which are combined and connected together, a part of the fiber cores of the OPGW optical cables on both sides are connected through the direct-fusion OPGW splicing box, and the other part of the fiber cores and the fiber cores of the branch optical cables are connected through the plug-in OPGW splicing box; an OPGW fusion unit is installed in the direct-fusion OPGW splicing box, and an OPGW plug-in unit is installed in the plug-in OPGW splicing box; The direct-melt OPGW splicing 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 splicing unit is connected to the bottom plate through a bracket, and the bottom plate is provided with screw holes for connecting the plug-in OPGW splicing box by screws; the plug-in OPGW splicing box comprises a shell with a through hole at the bottom and an open top, the shell of the plug-in OPGW splicing box is square, and a connecting portion connected to the bottom plate of the direct-melt OPGW splicing box is provided on the outer edge of the upper end of the shell, and a threaded hole is provided on the connecting portion; 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 a plurality of pressure blocks for pressing the flange; a hole for connecting the direct-melt OPGW junction box and the plug-in OPGW junction box is opened on the bottom plate; a door is arranged on one side of the shell.

2. A method for deploying the OPGW connection point deployment structure of a transmission line straight tower as claimed in claim 1, characterized in that: The following steps are involved: (1) A breakpoint is set at the OPGW optical cable at the straight pole tower, and the top corner of the triangular connecting plate is hung on the cross arm of the straight pole tower through the optical cable hanging point hardware. The OPGW optical cables on both sides are hung on the two bottom corners of the triangular connecting plate through the optical cable pre-hinged hardware; (2) The OPGW optical cables on both sides are respectively led down along the main material of the tower leg of the straight pole tower to the lower part of the straight pole tower and connected to the OPGW junction box; (3) The fiber core of the OPGW optical cable is divided into two parts, one part of the fiber core is connected to the direct-fusion OPGW junction box for direct fixed fusion to form a long-distance point-to-point power optical fiber transmission channel, and the required number of OPGW fiber cores are first extracted from the other part of the fiber core and the core of the branch optical cable is plugged in and connected through the plug-in OPGW junction box. Then the branch optical cable is connected to the optical interface of the emerging business communication equipment on the straight pole tower. The remaining unused fiber cores in the other part of the fiber core are also plugged in and connected through the plug-in OPGW junction box.

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