Photoelectric separation device, connection system and overhead transmission line

Abstract

The present invention proposes an optoelectronic separation device, a splicing system and an overhead power transmission line, which relate to the technical field of optical fiber communication equipment. The optoelectronic separation device includes an insulating box, a voltage-equalizing ring, an inner protective tube, an outer protective tube and a cold shrink terminal head. An insulating board is arranged in the insulating box, one end of which is used to pass an OPGW cable, and the OPGW cable is arranged on the insulating board; the voltage-equalizing ring is arranged on the OPGW cable, and is arranged in an open structure; the inner protective tube is sleeved on the optical unit of the OPGW cable; one end of the outer protective tube is connected to the inner protective tube, and the optical unit is passed through the inside of the outer protective tube, and the other end of the outer protective tube passes through the insulating box; the cold shrink terminal head is connected to the outer protective tube, and the cold shrink terminal head is connected to the outer protective tube. The optoelectronic separation device makes the optical unit directly contacted by the splicing box an insulated optical unit without electricity, so that the splicing box does not have the problem of being charged, and also greatly increases the insulation distance of the OPGW cables at both ends of the splicing, reduces the difficulty of operation and maintenance, and solves the potential safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber communication equipment, and in particular to a photoelectric separation device, a connection system and an overhead power transmission line. Background Art

[0002] OPGW (Optical Fiber Composite Overhead Ground Wire) is a fiber optic communication network on the transmission line that places optical fiber in the ground wire of an overhead high-voltage transmission line. This structural form has both ground wire and communication functions. With the rapid development and advancement of intelligent power systems, high-speed and reliable communication networks are particularly important for the power industry. Among many communication technologies, optical fiber power ground wire (OPGW) cable technology has been widely used in the field of power communications due to its unique characteristics and advantages, and has a broader development prospect in the future.

[0003] At present, both the optical fiber composite overhead ground wire (OPGW) and the ordinary ground wire adopt the tower-by-tower grounding wiring method. This wiring method causes the current to generate mutual inductance on the OPGW cable and the ordinary ground wire, and forms a current between the OPGW cable, the ordinary ground wire and the earth, thereby generating power loss, of which the power loss of OPGW and the ordinary ground wire accounts for the majority of the entire line loss. After insulating the overhead ground wire from the ground, the line loss can be reduced. After the OPGW cable adopts the segmented insulation and one-point grounding method, the grounding point potential is zero, but there is an induced potential to the ground on the OPGW cables on both sides of the grounding point. The farther away from the grounding point, the greater the induced potential.

[0004] When the OPGW cable is insulated and connected, the traditional splicing box is in direct contact with the OPGW cable and is also a charged body. The traditional splicing box is in direct contact with the OPGW optical cable. When performing photoelectric separation and splicing operations on the splicing box, the box body will be charged and the optical fiber will be punctured and burned due to insufficient insulation distance. In addition, when climbing the tower, the operation and maintenance personnel must not directly touch the OPGW cable or the equipment that is directly electrically connected to the OPGW cable, which increases the difficulty of operation and maintenance and creates safety hazards. Summary of the invention

[0005] In view of this, the present invention proposes an optoelectronic separation device, a connection system and an overhead transmission line, so that the optical unit directly contacted by the connection box is an insulated optical unit without electricity, so that the connection box does not have the problem of being charged. At the same time, it also greatly increases the insulation distance of the OPGW cables at both ends of the connection, reduces the difficulty of operation and maintenance, and solves safety hazards.

[0006] The technical solution of the present invention is achieved in this way:

[0007] The present invention provides a photoelectric separation device, comprising:

[0008] An insulating box, wherein a receiving cavity is formed inside the insulating box, an insulating plate is arranged in the receiving cavity, one end of the insulating box is used to pass the OPGW cable, and the end of the OPGW cable is arranged on the insulating plate;

[0009] A voltage-equalizing ring is arranged on the OPGW cable and is arranged in an open structure;

[0010] An inner protective tube, arranged on the insulating plate and sleeved on the optical unit of the OPGW cable;

[0011] an outer protective tube, one end of which is connected to the inner protective tube, the optical unit is arranged inside the outer protective tube, and the other end of the outer protective tube passes through the insulating box; and

[0012] The cold shrink terminal head is connected to the outer protective tube, and the outer protective sheath tube is connected to the cold shrink terminal head.

[0013] On the basis of the above technical solution, preferably, it further includes three groups of insulation positioning mechanisms arranged in the accommodating cavity, and each of the insulation positioning mechanisms is used to cooperate with the OPGW cable, the inner protective tube and the outer protective tube respectively.

[0014] More preferably, the insulation positioning mechanism comprises:

[0015] A positioning seat, arranged on the insulating plate, and a first positioning groove is formed on the positioning seat;

[0016] A positioning pressing block is pressed on the positioning seat, a second positioning groove is formed on the positioning seat, and the first positioning groove and the second positioning groove are combined with each other to form a positioning channel; and

[0017] A locking member is used to lock and connect the positioning seat and the positioning pressing block.

[0018] More preferably, a plurality of first positioning teeth are arranged at intervals in the first positioning groove, a plurality of second positioning teeth are arranged at intervals in the second positioning groove, and the first positioning teeth and the second positioning teeth are arranged alternately along the axial direction of the positioning channel.

[0019] More preferably, the locking member comprises a locking bolt, and the locking bolt is used to connect and adjust the clamping force between the positioning seat and the positioning pressing block.

[0020] On the basis of the above technical solution, preferably, both ends of the inner protective tube and both ends of the outer protective tube are provided with silicone plugs.

[0021] The present invention also provides a connection system, including a connection box and the aforementioned photoelectric separation device, wherein two photoelectric separation devices are provided, and the two connection ends of the connection box are respectively connected to first insulating pillars, and the two first insulating pillars are respectively connected to the outer sheath tubes of the two photoelectric separation devices, and a heat shrink tube is connected between the outer sheath tube and the first insulating pillars.

[0022] The present invention also provides an overhead power transmission line, comprising a pole tower and the aforementioned connection system, wherein a bracket is arranged on the bottom platform of the pole tower, and a connection box of the connection system is arranged on the bracket;

[0023] Two groups of insulating type tension cables are arranged at intervals on the top of the tower. The insulating type tension cables have line discharge gaps. The OPGW cables led down by the insulating type tension cables are respectively connected to the two photoelectric separation devices through a plurality of insulating down-lead fasteners arranged at intervals.

[0024] On the basis of the above technical solution, preferably, the insulating down-lead fastener comprises a locking clamp and a cable locking clamp, the locking clamp is used to lock and fix on the pole tower, the cable locking clamp is used to clamp the OPGW cable, and an insulator is connected between the locking clamp and the cable locking clamp.

[0025] Further preferably, two excess cable racks are arranged at intervals on the bottom platform of the pole tower, and the two excess cable racks are respectively used to cooperate with the two OPGW cables led down, and the excess cable racks include an installation back clamp and a cable back clamp, and the installation back clamp is provided with a tower clamp, a second insulating support is connected between the installation back clamp and the cable back clamp, and the cable back clamp is provided with a plurality of cable forks.

[0026] The photoelectric separation device, connection system and overhead transmission line of the present invention have the following beneficial effects compared with the prior art:

[0027] (1) Connect the end of the OPGW cable to the insulation box, and sequentially connect the optical unit of the OPGW cable through the insulating inner protective tube and the insulating outer protective tube, so as to introduce the optical unit into the connection box for connection. By setting a voltage equalizing ring on the device and a cold shrink terminal head on the outer protective tube, the OPGW cable with the voltage equalizing ring and the cold shrink terminal head can provide stable electrical and optical signal transmission, strong anti-interference ability, and can also extend the insulation distance to ensure safety. In addition, by setting an insulation positioning mechanism in the insulation box, the stability of the optical unit, the inner protective tube and the outer protective tube can be guaranteed, and the insulation effect can be further guaranteed;

[0028] (2) By connecting the optoelectronic separation device to the junction box, the optical unit in contact with the junction box is insulated, which solves the problem of the junction box being charged. At the same time, it also greatly increases the insulation distance of the OPGW cables at both ends of the junction. In addition, by setting the heat shrink tubing, the insulation sealing performance of the junction box is enhanced, which solves the problem of the junction box breaking through and burning the optical fiber during operation, ensures the safe production of the power grid, and reduces the operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 is a three-dimensional diagram of the photoelectric separation device of the present invention;

[0031] Figure 2 for Figure 1 Exploded diagram of

[0032] Figure 3 for Figure 2 A magnified view of part A in FIG.

[0033] Figure 4 It is a three-dimensional diagram of a box body in the photoelectric separation device of the present invention;

[0034] Figure 5 A three-dimensional diagram of a box cover in the photoelectric separation device of the present invention;

[0035] Figure 6 It is a three-dimensional diagram of the insulation positioning mechanism in the photoelectric separation device of the present invention;

[0036] Figure 7 is a three-dimensional diagram of the splicing system of the present invention;

[0037] Figure 8 A three-dimensional diagram of a junction box in the connection system of the present invention;

[0038] Fig. 9 It is a structural schematic diagram of an overhead power transmission line of the present invention;

[0039] Fig.10 It is a three-dimensional diagram of an insulating down-lead fastener in an overhead power transmission line of the present invention;

[0040] Fig.11 A three-dimensional diagram of a residual cable rack in an overhead power transmission line of the present invention;

[0041] Fig.12It is a schematic diagram of the structure of the short-circuit conductor in the overhead power transmission line of the present invention;

[0042] Reference numerals:

[0043] 1. OPGW cable; 2. Optical unit; 3. Insulation box; 31. Box body; 32. Box cover; 33. First connector; 34. Second connector; 4. Insulation plate; 5. Equalizing ring; 6. Inner protective tube; 7. Outer protective tube; 8. Cold shrink terminal head; 9. Insulation positioning mechanism; 91. Positioning seat; 92. Positioning block; 93. Positioning channel; 94. Locking piece; 95. First positioning tooth; 96. Second positioning tooth; 10. Outer protective tube; 11. Silicone plug; 12. Connection Box; 13. First insulating support; 14. Heat shrink tubing; 15. Pole tower; 16. Bracket; 17. Line discharge gap; 18. Insulated down-lead fastener; 181. Locking clamp; 182. Cable locking clamp; 183. Insulator; 19. Remaining cable rack; 191. Installation back clamp; 192. Cable back clamp; 193. Tower clamp; 194. Second insulating support; 195. Cable fork; 20. Grounding ring; 21. Short-circuit conductor; 22. Aluminum wire clamp; 23. Aluminum stranded wire. DETAILED DESCRIPTION

[0044] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] like Figures 1 to 6 As shown, the present invention provides a photoelectric separation device, which includes an insulating box 3, a voltage-equalizing ring 5, an inner protective tube 6, an outer protective tube 7 and a cold shrink terminal head 8, wherein a receiving cavity is formed inside the insulating box 3, an insulating plate 4 is arranged inside the receiving cavity, one end of the insulating box 3 is used to pass through the OPGW cable 1, and the end of the OPGW cable 1 is arranged on the insulating plate 4. The voltage-equalizing ring 5 is arranged on the OPGW cable 1 and is arranged in an open structure; the inner protective tube 6 is arranged on the insulating plate 4 and is sleeved on the optical unit 2 of the OPGW cable 1; one end of the outer protective tube 7 is connected to the inner protective tube 6, the optical unit 2 is passed through the inner part of the outer protective tube 7, and the other end of the outer protective tube 7 passes through the insulating box 3; the cold shrink terminal head 8 is connected to the outer protective tube 7, and the outer protective sheath tube 10 is connected to the cold shrink terminal head 8.

[0046] The end of the OPGW cable 1 led down is used to lead the optical unit 2 (optical fiber) therein down and strip the main cable. The end of the OPGW cable 1 led down passes through the insulating box 3, and the optical unit 2 is sequentially passed through the inner protective tube 6 and the outer protective tube 7, and the optical unit 2 is connected to the junction box 12 through the outer protective tube 10 for connection. The insulating inner protective tube 6 and the insulating outer protective tube 7 replace the stainless steel protective tube of the optical unit 2, so that the optical unit 2 in contact with the junction box 12 is made of insulating material as a whole to prevent the junction box 12 from being charged. Among them, by arranging the equalizing ring 5 on the OPGW cable 1, and the equalizing ring 5 is an open type, the uniform distribution of the AC voltage is achieved, and the discharge gap function is also provided. By arranging the cold shrink terminal head 8 on the outer protective tube 7, the electrical connection is achieved, and the insulation protection of the cable connection is provided; the outer protective tube 10 of the photoelectric separation device is used to connect with the junction box 12.

[0047] The photoelectric separation device provided in this embodiment leads the optical unit 2 in the OPGW cable 1 down and strips the main cable before entering the splicing box 12, so that the optical unit 2 directly contacted by the splicing box 12 is an insulated optical unit 2 without electricity, so that the splicing box 12 does not have the problem of being charged, and at the same time greatly increases the insulation distance of the OPGW cables 1 at both ends of the splicing, reduces the difficulty of operation and maintenance, and solves the potential safety hazards. It effectively solves the problem that the traditional splicing box 12 directly contacts the OPGW optical cable, performs photoelectric separation and splicing operations on the splicing box 12, and the box body 31 is charged and the optical fiber is broken through and burned due to insufficient insulation distance.

[0048] The voltage-equalizing ring 5 forms a closed ring around the high-voltage object to ensure that the potential difference between the various parts in the ring remains consistent, thereby achieving a voltage-equalizing effect. The voltage-equalizing ring 5 has a discharge opening on the ring body, so that the voltage-equalizing ring 5 has the function of a discharge gap in addition to the voltage-equalizing function. When used on a high-voltage line, it can more effectively protect the surface of the insulator from electric burns, because once an overvoltage discharge occurs, the discharge will preferentially occur on the discharge gap.

[0049] A cold shrink terminal head 8 is arranged on the outer sheath tube 10. The OPGW cable 1, in combination with the voltage-equalizing ring 5 and the cold shrink terminal head 8, can provide stable transmission of electrical and optical signals, has strong anti-interference capability, and can also extend the insulation distance to ensure safety.

[0050] like Figures 1 to 6 As shown, in some embodiments, the insulating box 3 includes a box body 31 and a box cover 32, wherein the insulating box 3 as a whole adopts a cylindrical design, and the box body 31 and the box cover 32 are made of materials that are corrosion-resistant and aging-resistant, have strong insulation properties, high hardness, good machining properties, and light material density, such as epoxy glass fiber material.

[0051] Considering the requirements of simple construction and sealing, the box body 31 and the box cover 32 are connected by a connecting assembly, which includes a first connecting member 33 and a second connecting member 34, which are embedded and matched, one of which is an annular block and the other is an annular groove, and the first connecting member 33 is arranged on the box body 31, specifically, on the end face of the box body 31 used to match with the box cover 32; the second connecting member 34 is arranged on the box cover 32, specifically, on the end face of the box cover 32 used to match with the box body 31. In this way, positioning installation and glue sealing are convenient, and rainwater can be prevented from penetrating into the shell to cause safety hazards.

[0052] Optionally, both ends of the inner protective tube 6 and the outer protective tube 7 are provided with silicone plugs 11. The provision of the silicone plugs 11 can ensure a sealing effect, prevent moisture, humidity and other corrosive media from penetrating into the inner protective tube 6 and the outer protective tube 7, and protect the internal light unit 2 from moisture and corrosion. In addition, the silicone plugs 11 can be tightly filled at the ends of the inner protective tube 6 and the outer protective tube 7, providing a fixing and supporting effect for the internal light unit 2, preventing displacement or damage due to external forces; the use of the silicone plugs 11 can also provide additional electrical insulation protection to prevent current leakage or short circuit.

[0053] like Figures 1 to 6 As shown, the optoelectronic separation device also includes three groups of insulating positioning mechanisms 9 arranged in the accommodating cavity, and each of the insulating positioning mechanisms 9 is used to cooperate with the OPGW cable 1, the inner protective tube 6 and the outer protective tube 7 respectively; the OPGW cable 1, the inner protective tube 6 and the outer protective tube 7 are respectively fixed in the insulating box 3 by the three groups of insulating positioning mechanisms 9, so as to ensure the stability of the internal components of the insulating box 3 and the reliability of the connection.

[0054] The insulating positioning mechanism 9 includes a positioning seat 91, a positioning pressure block 92 and a locking member 94, wherein the positioning seat 91 is arranged on the insulating plate 4, and a first positioning groove is formed on the positioning seat 91; the positioning pressure block 92 is pressed on the positioning seat 91, and a second positioning groove is formed on the positioning seat 91, and the first positioning groove and the second positioning groove are combined with each other to form a positioning channel 93; the locking member 94 is used to lock and connect the positioning seat 91 and the positioning pressure block 92.

[0055] The OPGW cable 1, the inner protective tube 6 and the outer protective tube 7 are respectively arranged in the three positioning channels 93 of the three insulating positioning mechanisms 9, and are locked and fixed by corresponding locking members 94, thereby ensuring the fixed connection effect and avoiding the situation of falling off. Considering the clamping strength and electrochemical corrosion of the insulating positioning mechanism 9, the insulating positioning mechanism 9 is made of aluminum alloy.

[0056] The locking member 94 is used to lock and connect the positioning seat 91 and the positioning block 92. The locking member 94 includes but is not limited to structures such as screws or buckles. The locking member 94 in this embodiment includes a locking bolt, which is used to connect and adjust the clamping force between the positioning seat 91 and the positioning block 92. The locking bolt can pass through the positioning block 92 and be threaded with the positioning seat 91. The clamping force can be controlled by adjusting the locking bolt, which has certain controllability and flexibility.

[0057] Of course, the insulation positioning mechanism 9 can be set up in a modular structure, and the three groups of insulation positioning mechanisms 9 are respectively used to match the OPGW cable 1, the inner protective tube 6 and the outer protective tube 7. The insulation positioning mechanism 9 used to match the OPGW cable 1 can replace different specifications of the positioning seat 91 and the positioning block 92 according to the size of the cable diameter of the clamped OPGW cable 1. It can be known that the insulation positioning mechanism 9 used to match the inner protective tube 6 can replace different specifications of the positioning seat 91 and the positioning block 92 according to the size of the diameter of the clamped inner protective tube 6; the insulation positioning mechanism 9 used to match the outer protective tube 7 can replace different specifications of the positioning seat 91 and the positioning block 92 according to the size of the diameter of the clamped outer protective tube 7.

[0058] Optionally, a plurality of first positioning teeth 95 are arranged at intervals in the first positioning groove, and a plurality of second positioning teeth 96 are arranged at intervals in the second positioning groove, and the first positioning teeth 95 and the second positioning teeth 96 are arranged alternately along the axial direction of the positioning channel 93; specifically, the first positioning teeth 95 and the second positioning teeth 96 are used to cooperate with the OPGW cable 1, and the bite force and contact area of ​​the clamping cable can be increased by the staggered arrangement of the first positioning teeth 95 and the second positioning teeth 96, so as to improve the tensile and torsional effects of the cable. The structure is simple, easy to process, and has a good clamping effect, and can meet the use requirements of cables with different outer diameters within a certain range.

[0059] When connecting, first mark the stripping length of OPGW cable 1, wrap it with electrical tape to fix the mark, separate the OPGW cable 1, cut the aluminum strands, and leave the stainless steel tube optical unit 2. Put the marked end optical unit 2 into the silicone plug 11, and put the silicone plug 11 on the tail end of the inner protective tube 6. Put the stainless steel optical unit 2 into the inner protective tube 6, and then cut the stainless steel sheath of the optical unit 2 with a micro-tube cutter and pull it out, and put the silicone plug 11 into the inner protective tube 6. Install the insulating cold shrink terminal head 8 on the outer protective tube 7, and the OPGW cable 1 enters the insulation box 3 from the lower end of the photoelectric separation device, and the optical unit is led out from the upper end of the insulation box 3 to prevent rainwater from entering the insulation box 3 along the gap between the strands. Plug the silicone plug 11 into the outer protective tube 7 and fix it as a whole on the photoelectric separation device. Pay attention to the installation direction and position, and keep a record. Finally, the upper and lower ends of the optoelectronic separation box body 31 are fixed with an optoelectronic separation frame. The optoelectronic separation frame can use insulators 183 to prevent wind swing from damaging the optoelectronic separation device and the optical unit 2. The splicing cable enters the wire entry hole of the splicing box 12 through the insulator 183, and the splicing box 12 is melted. After melting, the test is carried out to check the sealing of the box body 31.

[0060] In summary, the embodiment of the present application provides an optoelectronic separation device, which connects the end of the OPGW cable 1 to the insulating box 3, and sequentially connects the optical unit 2 of the OPGW cable 1 through the insulating inner protective tube 6 and the insulating outer protective tube 7, so that the optical unit 2 is introduced into the connection box 12 for connection. By setting a voltage equalizing ring 5 on the device and setting a cold shrink terminal head 8 on the outer protective sheath tube 10, the OPGW cable 1 is equipped with the voltage equalizing ring 5 and the cold shrink terminal head 8, which can provide stable electrical and optical signal transmission, strong anti-interference ability, and can also extend the insulation distance to ensure safety. In addition, by setting an insulating positioning mechanism 9 in the insulating box 3, the stability of the optical unit 2, the inner protective tube 6 and the outer protective tube 7 can be guaranteed, and the insulation effect can be further guaranteed.

[0061] like Figures 1 to 7 As shown, the present invention also provides a connection system, including a connection box 12 and the above-mentioned photoelectric separation device, wherein two photoelectric separation devices are provided, and the two connection ends of the connection box 12 are respectively connected to the first insulating pillars 13, and the two first insulating pillars 13 are respectively connected to the outer sheath tubes 10 of the two photoelectric separation devices, and a heat shrink tube 14 is connected between the outer sheath tube 10 and the first insulating pillars 13.

[0062] The splicing box 12 can be a conventional OPGW photoelectric separation splicing box 12. On the basis of having a splicing function, the two line inlets of the splicing box 12 are respectively used to connect with the two optical units 2 led out of the two photoelectric separation devices. The splicing system adopts the above-mentioned photoelectric separation device, so that the optical unit 2 in contact with the splicing box 12 is an insulator, which solves the problem of the splicing box 12 being charged, and solves the problem that the traditional splicing box 12 directly contacts the OPGW optical cable, and the photoelectric separation and splicing operations are performed on the splicing box 12, and the box body 31 is charged, and the box body 31 is broken and burned due to insufficient insulation distance. The optical fiber increases the operation and maintenance costs of the power grid, and threatens the safe production of the power grid.

[0063] Both ends of the junction box 12 are respectively connected to the first insulating pillars 13, which are used to support and fix the optical unit 2, and can also play an insulating role, maintain a certain distance and space, and ensure safe and reliable power transmission.

[0064] A heat shrink tube 14 is connected between the first insulating support 13 and the outer sheath tube 10. The heat shrink tube 14 can provide insulation protection for the optical unit 2 to prevent leakage and short circuit, thereby ensuring the safety and reliability of the electrical equipment. The heat shrink tube 14 can also wrap the optical unit 2 inside to provide sealing and waterproof functions, thereby protecting it from the influence of water and moisture.

[0065] To sum up, the connection system provided in this embodiment can fix the optical unit 2 at both ends of the connection box 12, and seal it as a whole with a high-power heat shrink tubing 14 at the line inlet, thereby enhancing the insulation and sealing performance of the connection box 12, solving the problem of the connection box 12 breaking through and burning the optical fiber during operation, ensuring the safe production of the power grid, and reducing operation and maintenance costs.

[0066] like Figures 1 to 9 As shown, the present invention also provides an overhead transmission line, including a pole tower 15 and the above-mentioned connection system, wherein a bracket 16 is arranged on the bottom platform of the pole tower 15, and the connection box 12 of the connection system is arranged on the bracket 16; two groups of insulated tension cables are arranged at intervals on the top of the pole tower 15, and the insulated tension cables have a line discharge gap 17, and the OPGW cable 1 led down by the insulated tension cables is respectively connected to the two photoelectric separation devices through a plurality of insulated down-lead fasteners 18 arranged at intervals. Among them, the bracket 16 is used to support and fix the connection box 12, so as to ensure the stability of the connection box 12 on the pole tower 15, and the bracket 16 can be any component that can realize the supporting function, and of course, the bracket 16 can also be a special bracket 16 for the connection box 12.

[0067] The segmented insulation technology of OPGW cable 1 is widely used in ultra-high voltage, ultra-high voltage, and transmission lines. The entire circuit system is formed by connecting multiple OPGW cables 1 to each other. Two adjacent OPGW cables 1 are led down through the pole tower 15. After being led down, the two optical units 2 in the two OPGW cables 1 are connected through the junction box 12, so that multiple OPGW cables 1 are connected to form a whole high-voltage cable. By leading the OPGW cable 1 down and connecting it on the bottom platform of the pole tower 15, it is convenient to connect and reduce the danger of operation. The optical unit 2 in the OPGW cable 1 is separated from the metal conductor (ground wire unit) by the optoelectronic separation device of the OPGW cable 1, so as to facilitate the connection and maintenance of the optical unit 2. The optoelectronic separation device allows the connection and maintenance of the optical unit 2 without contacting the high-voltage power line, which greatly improves the safety of the operation.

[0068] Reference Fig. 9 and Fig.10 The insulating down-lead fastener 18 includes a locking clamp 181 and a cable locking clamp 182, wherein the locking clamp 181 is used to lock and fix on the pole tower 15, and the cable locking clamp 182 is used to clamp the OPGW cable 1, and an insulator 183 is connected between the locking clamp 181 and the cable locking clamp 182; the insulator 183 is provided to increase the insulation distance between the OPGW cable 1 and the pole tower 15, so as to avoid the situation that the OPGW cable 1 is discharged and adsorbed to the nearby tower material due to the OPGW cable 1 being too close to the tower material and the insulation distance being insufficient, thereby preventing the OPGW cable 1 from ablation due to the induction voltage of the OPGW cable 1.

[0069] Among them, the insulator 183 includes a pin insulator, a rod insulator or a wire insulator, etc. The insulator 183 in the present application adopts a pin insulator, which is used to support or suspend the OPGW cable 1 and form electrical insulation between the tower 15 and the OPGW cable 1.

[0070] The cable clamp 182 is used to clamp and fix the OPGW cable 1. The cable clamp 182 can be any component that can currently fix the OPGW cable 1; the locking clamp 181 is used to be fixedly connected to the pole tower 15. The locking clamp 181 can include a U-shaped frame, one end of the U-shaped frame is connected to the insulator 183, the other end of the insulator 183 is connected to the cable locking frame, and the other end of the U-shaped frame is screwed with an adjusting bolt. The opening of the U-shaped frame is used to cooperate with the pole tower 15, and the locking clamp 181 is clamped and fixed on the pole tower 15 by screwing the adjusting bolt.

[0071] As a result, the insulation distance between the OPGW cable 1 and the tower material is greatly increased, preventing the pole tower 15 from discharging, and solving the problem that the OPGW cable 1 is too close to the pole tower 15 and the insulation distance is insufficient, causing the OPGW cable 1 to discharge and absorb the pole tower 15 nearby due to the induced voltage of the OPGW cable 1, thereby causing the optical cable to burn.

[0072] Optionally, each insulating down-lead fastener 18 is installed at a first preset distance, which may be 1.5 to 2 meters. The OPGW cable 1 should be straight and beautiful when led down, and an insulating down-lead fastener 18 is installed every 1.5 to 2 meters to prevent friction between the OPGW cable 1 and the pole tower 15.

[0073] Reference Fig. 9 It can be seen that during installation, the optoelectronic separation device is set in an inclined state, and the upper and lower ends of the optoelectronic separation device can be fixed on the pole tower 15 through the optoelectronic separation bracket. Here, the optoelectronic separation bracket can include an insulating down-lead fastener 18, so as to clamp and fix the optoelectronic separation device to prevent wind swing. In addition, the optoelectronic separation device has a top and a bottom in an inclined state, and the top is located above the bottom. The down-lead OPGW cable 1 enters the insulating box 3 of the optoelectronic separation device through the bottom end of the optoelectronic separation device, and the optical unit 2 of the down-lead OPGW cable 1 is led out of the insulating box 3 of the optoelectronic separation device through the top end of the optoelectronic separation device, which can effectively prevent rainwater from entering the insulating box 3 along the twisted wire gap of the OPGW cable 1.

[0074] Reference Fig. 9 and Fig.11 Two cable racks 19 are arranged at intervals on the bottom platform of the pole tower 15. The two cable racks 19 are used to cooperate with the two OPGW cables 1 led down. The cable racks 19 include an installation back clamp 191 and a cable back clamp 192. The installation back clamp 191 is provided with a tower clamp 193. A second insulating support 194 is connected between the installation back clamp 191 and the cable back clamp 192. The cable back clamp 192 is provided with a plurality of cable forks 195; the cable fork 195 is an insulating cable fork, which is used to support and fix the cable and provide insulation protection to ensure the safe and stable operation of the OPGW cable 1. The tower clamp 193 is used to be fixedly connected to the pole tower 15. The tower clamp 193 can be any fixing clamp that can achieve connection.

[0075] Specifically, the mounting back clamp 191 is provided in a long strip-shaped structure, and two tower clamps 193 are connected to the two ends of the mounting back clamp 191 in the length direction, respectively. The two tower clamps 193 are used to connect to the pole tower 15, so as to fix the cable rack 19 to the pole tower 15. The cable back clamp 192 is provided in a cross-shaped frame structure, and a plurality of cable forks 195 are respectively provided at each end of the cable back clamp 192. Optionally, four cable forks 195 are provided, and the four cable forks 195 are respectively provided at the four ends of the cross body. The second insulating support 194 is used to connect the mounting back clamp 191 and the cable back clamp 192. One end of the second insulating support 194 can be connected to the middle position of the mounting back clamp 191, and the other end of the second insulating support 194 can be connected to the center of the cable back clamp 192. Of course, two or more second insulating supports 194 can also be provided to increase the connection effect between the mounting back clamp 191 and the cable back clamp 192.

[0076] The traditional cable rack 19 is made of hot-dip galvanized iron. The reserved OPGW cable 1 is in contact with the turn-to-turn surface for a long time. Under the induced voltage, it is exposed to rain and humid environment, causing the inter-turn strands to be electro-corroded and oxidized. Because the reserved cable fork 195 is made of iron material, it has a magnetic property to the inter-turn magnetic induction of the reserved cable wound in the disk, which promotes the inter-turn reserved cable to be electro-corroded and broken faster. To solve this problem, the short-circuited reserved cable technical measures and the cable fork 195 use weather-resistant insulation materials to prevent the OPGW cable 1 from generating inter-turn electro-corrosion when winding; the second insulating support 194 is a standard part. According to the size of the line induced voltage, the insulating support of the appropriate voltage level is selected to increase the insulation distance between the OPGW cable 1 and the pole tower 15, so as to prevent the OPGW cable 1 from discharging and adsorbing the pole tower 15, thereby causing the problem of optical cable ablation. The installation back clamp 191 is used to successively install the insulated cable fork 195, the second insulating support 194, and the tower clamp 193, so that they are firmly and reliably installed as a whole on the pole tower 15. The mounting back clamp 191 is made of aluminum alloy, which has strong corrosion resistance, light weight and is easy to construct and install.

[0077] A short-circuit wire 21 can also be provided on the cable rack 19. The short-circuit wire 21 can be used as an overhead ground wire and directly grounded to reduce the chance of lightning strikes on the wire, improve the lightning resistance level of the line, reduce the lightning trip rate, and ensure safe power transmission of the line. The OPGW cable 1 is installed above the short-circuit wire 21, which can effectively introduce the discharge of lightning into the earth and protect the OPGW cable 1 from lightning damage; the short-circuit wire 21 also has the function of resisting electromagnetic interference. Since the optical fiber communication system has the advantages of low transmission loss, large information capacity, long transmission distance, and strong confidentiality, the metal wires twisted outside the OPGW cable 1 can make the OPGW cable 1 more reliable, stable, and firm, not only protecting the optical fiber, but also having mechanical and electrical properties that are almost the same as those of the traditional ordinary ground wire, and can provide corresponding mechanical strength to carry the short-circuit current flowing through. In this way, the OPGW cable 1 can reduce the potential supply current of the transmission line, reduce the power frequency overvoltage, and improve the interference and dangerous effects of the power line on the communication line.

[0078] Reference Figures 9 to 12 Specifically, a short-circuit conductor 21 is arranged at a third preset distance from the OPGW cable 1 to the residual cable rack 19, and the short-circuit conductor 21 is short-circuited with an aluminum wire clamp 22 and an aluminum stranded wire 23, and the third preset distance may be 450 mm to 550 mm. Thus, two aluminum wire clamps 22 are arranged at 450 mm to 550 mm from the residual cable rack 19 where the OPGW cable 1 is led in and out, and an aluminum stranded wire 23 is used to short-circuit between the two aluminum wire clamps 22 to prevent inter-turn electrical corrosion.

[0079] The overhead transmission line also includes a plurality of hanging grounding rings spaced apart on the pole tower 15. The grounding hanging ring 20 is used to reliably connect the OPGW cable 1 to the pole tower 15 or other grounding systems to ensure that the current can be safely directed to the ground in the event of a lightning strike or other large current shock, thereby protecting the OPGW cable 1 from damage. Optionally, each hanging grounding ring is installed at a second preset distance, which may be 10 to 12 meters. In this embodiment, adjacent hanging grounding rings are installed at a distance of 10 meters.

[0080] Reference Figures 1 to 12 The overhead transmission line is installed through the following steps. First, the OPGW cable 1 on the top of the tower 15 is led down through an insulated tension cable with a discharge gap. The distance of the discharge gap should meet the design requirements. The OPGW cable 1 is led down using an insulated lead-down clamp, and its insulation level should meet the line design requirements, with a spacing of 1.5 to 2m; the lead-down should be straight and beautiful, without hard bends or corners, and the distance between the OPGW cable 1 and the tower 15 and its ancillary facilities should meet the design requirements. The OPGW cable 1 should be installed with an electrical grounding ring 20 or other electrical grounding device according to the design, and the installation position should be convenient for OPGW maintenance operations.

[0081] Afterwards, the bracket 16 is installed on the outside of the tower body on the bottom platform of the pole tower 15 and is firmly connected to the tower body. When the two OPGW cables 1 are led down along the tower legs on both sides, the bracket 16 is fixed in the middle position of the plane of the two tower legs. Confirm the stripping position of the OPGW cable 1 and mark it. Wrap the waterproof self-adhesive tape 50mm from the front end of the stripping to prevent the strands from being scattered. Cut off the outer strands of the OPGW cable 1 and put it into the inner protective tube 6. Cut the steel pipe with a steel pipe cutter 50mm back from the stripping position of the OPGW cable 1, peel off the stainless steel unit, and clean the surface grease. The optical fiber must not be damaged during the operation. After the operation is completed, take a photo for preservation. Insert the inner protective tube 6 and the inner protective tube 6 inside and outside the stainless steel optical unit 2 respectively, and use the heat shrink sleeve 14 to heat shrink the inner protective tube 6 and the stainless steel optical unit 2 to tighten.

[0082] Then, the junction box 12 is installed, the OPGW cable 1 enters from the bottom of the optoelectronic separation device and exits from the top, the inner protective tube 6, the outer protective tube 7, the equalizing ring 5 and the cold shrink terminal head 8 are installed and fixed, the glue is injected and sealed, and the upper and lower ends of the optoelectronic separation device are fixed with pin insulators to prevent wind swing from causing damage to the optoelectronic separation device and the optical unit 2.

[0083] Then, two cable racks 19 are installed on the outside of the tower body on the bottom platform of the tower. The two cable racks 19 are electrically isolated from each other, and the OPGW cable 1 is short-circuited with parallel groove wire clamps and wires at the ends where the cable enters and exits the cable rack 19. The winding should be neat and orderly, and no cross-twisting or stress-bearing is allowed.

[0084] Finally, determine the fiber length of the optical unit 2 entering the splicing box 12 and fix the OPGW cable 1 at the stripping position. The fixation should be firm to prevent the OPGW cable 1 from loosening or twisting. Insert the optical unit 2 into the splicing box 12, ensure that the cable inlet of the splicing box 12 is well sealed, perform fiber splicing in the box, test after fiber splicing, and package the splicing box 12. The splicing box 12 should be well and firmly packaged, and waterproof and moisture-proof measures should be taken.

[0085] In summary, the overhead transmission line provided in this embodiment solves the problem of cable burning caused by live connection box 12 in the application of segmented insulation technology of OPGW cable 1, facilitates operation and maintenance, and eliminates potential safety hazards in power grid production; greatly reduces the power loss caused by mutual inductance between current and OPGW cable 1 and ordinary ground wire, which has positive significance for the construction of energy-saving and environmentally friendly transmission lines; and promotes the rapid development of power systems and intelligent, high-speed and reliable communication networks.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A photoelectric separation device, characterized in that: include: An insulating box (3) having an accommodating cavity formed therein, an insulating plate (4) being arranged in the accommodating cavity, one end of the insulating box (3) being used for passing an OPGW cable (1), and an end of the OPGW cable (1) being arranged on the insulating plate (4); A voltage equalizing ring (5) is arranged on the OPGW cable (1) and is arranged in an open structure; An inner protective tube (6) is arranged on the insulating plate (4) and sleeved on the optical unit (2) of the OPGW cable (1); an outer protective tube (7), one end of which is connected to the inner protective tube (6), the optical unit (2) is arranged inside the outer protective tube (7), and the other end of the outer protective tube (7) passes through the insulating box (3); and A cold shrink terminal head (8) is connected to the outer protective tube (7), and the cold shrink terminal head (8) is connected to an outer protective sheath tube (10).

2. The photoelectric separation device according to claim 1, characterized in that: It also includes three groups of insulation positioning mechanisms (9) arranged in the accommodating cavity, each of the insulation positioning mechanisms (9) being used to cooperate with the OPGW cable (1), the inner protective tube (6) and the outer protective tube (7) respectively.

3. The photoelectric separation device according to claim 2, characterized in that: The insulation positioning mechanism (9) comprises: A positioning seat (91) is arranged on the insulating plate (4), and a first positioning groove is formed on the positioning seat (91); A positioning pressing block (92) is pressed on the positioning seat (91), a second positioning groove is formed on the positioning seat (91), and the first positioning groove and the second positioning groove are combined to form a positioning channel (93); and A locking member (94) is used for lockingly connecting the positioning seat (91) and the positioning pressing block (92).

4. The photoelectric separation device according to claim 3, characterized in that: A plurality of first positioning teeth (95) are arranged at intervals in the first positioning groove, and a plurality of second positioning teeth (96) are arranged at intervals in the second positioning groove. The first positioning teeth (95) and the second positioning teeth (96) are arranged alternately along the axial direction of the positioning channel (93).

5. The photoelectric separation device according to claim 3, characterized in that: The locking member (94) comprises a locking bolt, and the locking bolt is used to connect and adjust the clamping force between the positioning seat (91) and the positioning pressing block (92).

6. The photoelectric separation device according to claim 1, characterized in that: Both ends of the inner protective tube (6) and both ends of the outer protective tube (7) are provided with silicone plugs (11).

7. A splicing system, characterized in that: It comprises a connection box (12) and the optoelectronic separation device according to any one of claims 1 to 6, wherein two optoelectronic separation devices are provided, and two connection ends of the connection box (12) are respectively connected to first insulating pillars (13), and two first insulating pillars (13) are respectively connected to two outer sheath tubes (10) of the optoelectronic separation devices, and a heat shrink tube (14) is connected between the outer sheath tube (10) and the first insulating pillars (13).

8. An overhead power transmission line, characterized in that: It comprises a pole tower (15) and the splicing system according to claim 7, wherein a bracket (16) is arranged on the bottom platform of the pole tower (15), and a splicing box (12) of the splicing system is arranged on the bracket (16); Two groups of insulated tension cables are arranged at intervals on the top of the pole tower (15), the insulated tension cables having a line discharge gap (17), and the insulated tension cable (1) is connected to the two photoelectric separation devices respectively through a plurality of insulated down-lead fasteners (18) arranged at intervals.

9. The overhead power transmission line according to claim 8, characterized in that: The insulating down-lead fastener (18) comprises a locking clamp (181) and a cable locking clamp (182); the locking clamp (181) is used for locking and fixing on the pole tower (15); the cable locking clamp (182) is used for clamping the OPGW cable (1); an insulator (183) is connected between the locking clamp (181) and the cable locking clamp (182).

10. The overhead power transmission line according to claim 9, characterized in that: Two excess cable racks (19) are arranged at intervals on the bottom platform of the pole tower (15), and the two excess cable racks (19) are respectively used to cooperate with the two OPGW cables (1) led down, and the excess cable rack (19) comprises an installation back clamp (191) and a cable back clamp (192), and a tower clamp (193) is arranged on the installation back clamp (191), a second insulating support (194) is connected between the installation back clamp (191) and the cable back clamp (192), and a plurality of cable forks (195) are arranged on the cable back clamp (192).

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