Splice closure and splice device for OPGW ice-melting optical cable

Abstract

Provided in the present invention are a splice closure and splice device for an OPGW ice-melting optical cable. The splice closure for an OPGW ice-melting optical cable comprises a housing, wherein the housing is provided with a plurality of first cable inlets arranged at intervals, and a plurality of optical cables extend into the housing through the plurality of first cable inlets; a support member arranged in the housing, wherein the support member is configured to support the optical cables in the housing; and a current-carrying member arranged on the support member, wherein the current-carrying member is configured to be electrically connected to conductive layers of the plurality of optical cables. The support member comprises a mounting part; and a support part arranged on the mounting part, wherein the support part has a first side and a second side arranged opposite each other, the first side being provided with the current-carrying member, and the second side being provided with a fiber splice tray; and the support part is provided with a plurality of limiting portions, the limiting portions being located between the first side and the second side, and each limiting portion having a limiting channel. The technical solution of the present invention solves the problem in the prior art of it being difficult for the interior of an OPGW splice closure to withstand ice-melting voltage and carry current.

Description

OPGW de-icing optical cable junction box and splice device

[0001] This application claims priority to the patent application filed on January 17, 2025 with the China National Intellectual Property Administration, application number 2025100754721, entitled "Junction Box and Joint Device for OPGW Ice-melting Optical Cable". Technical Field

[0002] This invention relates to the field of optical cable technology, and more specifically, to a junction box and junction device for OPGW de-icing optical cable. Background Technology

[0003] OPGW (Optical Fiber Composite Overhead Ground Wire) is a widely used optical cable in power systems, serving as both a communication channel and a lightning protection wire. It is extensively used in high-voltage transmission lines and is a primary carrier for communication transmission in power systems. However, in recent years, frequent rain, snow, and ice storms in my country have severely impacted OPGW ground wire lines, posing a significant threat to power grid safety. Since OPGW is typically grounded tower-by-tower, meaning it's connected directly to the tower pole, direct current flow for de-icing is impossible. Therefore, insulation upgrades are necessary for OPGW. Insulation not only increases construction costs (estimated to increase material costs by 10,000 RMB / km) but also raises construction requirements. Furthermore, OPGW insulation introduces difficulties and safety hazards for subsequent line operation and maintenance.

[0004] OPGW (Optical Wire Roofing) cable manufacturers have developed self-de-icing OPGWs, which incorporate an insulation layer within the OPGW to insulate the conductor from the outer aluminum-clad steel monofilament. By passing current through the conductive layer, heat is transferred to the outer layer of the OPGW, enabling de-icing. This eliminates the need for insulation of the OPGW when using a tower-by-tower grounding method. However, in existing technologies, OPGW junction boxes are only used for traditional sealing, mechanical functions, and connecting optical fibers in multiple composite overhead ground wires. The interior of the OPGW junction box is insufficient to handle the de-icing voltage and current carrying capacity, making it difficult to electrically connect the conductive layers of multiple composite overhead ground wires and form a conductive path, thus hindering the timely removal of ice and snow from the OPGW cable. Summary of the Invention

[0005] The main objective of this invention is to provide a junction box and junction device for OPGW de-icing optical cables, so as to solve the problem that the internal structure of the existing OPGW junction box is difficult to withstand the de-icing voltage and current.

[0006] To achieve the above objectives, the present invention provides a junction box for OPGW de-icing optical cable. The junction box includes a housing with a plurality of first cable inlets spaced apart, through which a plurality of optical cables extend into the housing; a support member disposed within the housing to support the optical cables within the housing, the support member being made of insulating material; a current-carrying member disposed on the support member, the current-carrying member being made of conductive material and configured to be electrically connected to the conductive layers of the plurality of optical cables; the support member includes a mounting member; and a support component disposed on the mounting member, the support component having a first side and a second side disposed opposite to each other, the first side having a current-carrying member and the second side having a fiber splicing tray, the support component having a plurality of limiting portions located between the first side and the second side, each limiting portion having a limiting channel, the plurality of limiting channels being correspondingly disposed with the plurality of first cable inlets.

[0007] Furthermore, the current-carrying component is provided with multiple clamping cavities, and the multiple clamping cavities are correspondingly arranged with multiple first cable inlets.

[0008] Furthermore, the current-carrying component includes a first clamping member with a first groove; a second clamping member with a second groove, wherein multiple second grooves are correspondingly arranged with multiple first grooves, and each second groove and its corresponding first groove form a clamping cavity; and a first connecting member for connecting the first clamping member and the second clamping member.

[0009] Furthermore, the current-carrying component includes a second connector, which has multiple through holes; multiple annular fingers, each through hole having multiple annular fingers; the second connector is electrically connected to the multiple annular fingers; a clamping chamber is formed within the annular fingers; and the multiple annular fingers are spaced apart along the axial direction of the through holes.

[0010] Furthermore, the current-carrying component also includes multiple mounting cylinders, which are installed in multiple through holes. The inner wall of each mounting cylinder is provided with multiple annular limiting grooves. The outer end of each annular contact finger is located in each annular limiting groove, and the inner end of each annular contact finger protrudes from each annular limiting groove. The multiple annular contact fingers are electrically connected to the second connector through the multiple mounting cylinders.

[0011] Furthermore, the limiting part includes a plurality of first limiting plates and a plurality of second limiting plates for forming a limiting channel, and the first limiting plates and the second limiting plates are alternately arranged along the extension direction of the optical cable.

[0012] Furthermore, at least some of the mounting components are provided with multiple umbrella-shaped structures, which are spaced apart along the axial direction of the mounting components.

[0013] Furthermore, the outer casing includes a base and a cap, the base is connected to the cap, a support member is disposed on the base, the base is provided with a plurality of first cable inlets, and the support member and the current-carrying member are located inside the cap.

[0014] Furthermore, the base is provided with an annular groove, and the OPGW de-icing optical cable junction box also includes: a sealing ring, which is located between the cap and the base, and is used to seal the connection between the cap and the base; and an annular seal, which is located in the annular groove along the radial direction of the cap and is located outside the sealing ring, and is used to seal the connection between the cap and the base.

[0015] Furthermore, the OPGW de-icing optical cable joint device also includes multiple insulating sleeves, each insulating sleeve is disposed on the base, and each insulating sleeve is located between the base and the current-carrying component. The multiple insulating sleeves are correspondingly disposed with multiple first cable inlets. Each insulating sleeve includes: a main body; multiple umbrella-shaped members connected to the outer periphery of the main body, and the multiple umbrella-shaped members are spaced apart along the axial direction of the main body.

[0016] Furthermore, the base is made of metal; and / or the cap is made of non-metallic material.

[0017] According to another aspect of the present invention, a connector device is provided, comprising an optical cable clamp and a connector box for the aforementioned OPGW de-icing optical cable, wherein the optical cable clamp and the connector box for the OPGW de-icing optical cable are connected.

[0018] Furthermore, the optical cable clamp includes a third connector connected to the base. The third connector has a plurality of second cable inlets spaced apart, which correspond to a plurality of first cable inlets. The fourth connector includes a first plate segment, a second plate segment, and a third plate segment connected in sequence and arranged at an angle to form a clamping space. The first plate segment is connected to the base, and the third plate segment is connected to the third connector.

[0019] By applying the technical solution of this invention, a current-carrying component is provided, and the current-carrying component is electrically connected to the conductive layers of multiple optical cables. In this way, by energizing the conductive layer of one of the multiple optical cables, current can flow from one of the optical cables through the current-carrying component to the remaining optical cables, thereby connecting the multiple optical cables. The junction box of the OPGW de-icing optical cable can not only carry current, but also allow current to flow through the conductive layers of multiple optical cables, thus forming a conductive path. The outer periphery of the conductive layer of the optical cable through which the current flows will heat up, thereby melting the ice and snow covering the optical cable. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 shows a schematic diagram of an embodiment of the connector device of the present invention;

[0022] Figure 2 shows a schematic diagram of the internal structure of an embodiment of the connector device of Figure 1 (wherein, the cap is not shown);

[0023] Figure 3 shows a structural schematic diagram of the connector device in Figure 2 from another perspective (where the current-carrying component in Embodiment 1 is shown);

[0024] Figure 4 shows another perspective structural schematic diagram of the OPGW de-icing optical cable splice box of the splice device in Figure 3;

[0025] Figure 5 shows a partial cross-sectional view of the junction box of the OPGW de-icing optical cable in Figure 4;

[0026] Figure 6 shows a top view of the junction box of the OPGW de-icing optical cable in Figure 4;

[0027] Figure 7 shows a schematic diagram of the insulating sleeve structure of the junction box of the OPGW de-icing optical cable in Figure 4;

[0028] Figure 8 shows a structural schematic diagram of the support structure of the junction box of the OPGW ice-melting optical cable in Figure 4 from one perspective;

[0029] Figure 9 shows a structural schematic diagram of the support member in Figure 8 from another perspective;

[0030] Figure 10 shows a front view of the support member in Figure 8;

[0031] Figure 11 shows a rear view of the support member of Figure 8;

[0032] Figure 12 shows a schematic diagram of an embodiment of the OPGW optical cable of the present invention;

[0033] Figure 13 shows a schematic diagram of the structure of the current-carrying component of the connector device in Figure 1 in a second embodiment.

[0034] The above-mentioned figures include the following reference numerals: 1. Base; 2. Optical cable clamp; 21. Third connector; 22. Fourth connector; 221. First plate segment; 222. Second plate segment; 223. Third plate segment; 3. Cap; 4. Optical cable; 41. Outer load-bearing monofilament layer; 42. Metal sheath; 43. Insulation layer; 44. Conductive layer; 45. Optical fiber unit; 46. Optical fiber; 5. Fusion spool; 6. Insulating sleeve; 61. Main body; 62. Umbrella-shaped component; 7. Supporting component; 71. Mounting base; 72. Umbrella-shaped structure; 73. Support component; 74. Locking block; 81. Mounting cylinder; 82. Annular limiting groove; 83. Annular contact finger; 9. Sealing ring; 10. Annular sealing component; 11. Current-carrying component; 113. First connector; 12. First limiting plate; 13. Second limiting plate. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] It should be noted that, as shown in Figure 12, in the embodiment of the present invention, the optical cable 4 includes an outer load-bearing monofilament layer 41, a metal sheath 42, an insulation layer 43, a conductive layer 44 and an optical fiber unit 45, which are sequentially arranged, wherein the optical fiber unit 45 includes multiple optical fibers 46.

[0037] Specifically, in the embodiments of the present invention, the outer load-bearing monofilament layer 41 is an outer aluminum-clad steel monofilament.

[0038] Specifically, in the embodiments of the present invention, as shown in FIG12, since the outermost layer of the optical cable 4 is the outer load-bearing monofilament layer 41, which consists of multiple monofilaments, it cannot be sealed. Therefore, it is necessary to peel off the outer load-bearing monofilament layer 41, pass each optical cable 4 through each second cable entry port and fix it in the optical cable clamp 2, and place the conical sealing plug, sealing gasket and sealing nut in sequence on the inner wall surface of the first cable entry port of each optical cable 4 to seal the outer wall of the metal sheath 42 of each optical cable 4. An insulating sleeve 6 is provided over the insulating layer 43 of each optical cable 4 to further increase the creepage distance. Each clamping cavity of the current-carrying member 11 clamps the conductive layer 44 of each optical cable 4 to conduct the electrical performance of the conductive layer 44 of the optical cable 4. After the conductive layer 44 is fixed, an optical fiber protection tube is placed over the optical fiber unit 45. After the optical fiber protection tube is limited in the limiting part of the support member 7, it enters the fusion splice tray 5 to perform the fusion splicing and winding of the optical fiber 46.

[0039] As shown in Figures 3, 4, and 6, the present invention provides a junction box for OPGW (Optical Point Wire Roofing) de-icing optical cables. The junction box includes a housing with a plurality of spaced-apart first cable inlets, through which a plurality of optical cables 4 extend into the housing; a support member 7 disposed within the housing, which supports the optical cables 4 within the housing and is made of insulating material; and a current-carrying member 11 disposed on the support member 7, which is made of conductive material and configured to be electrically connected to the conductive layer of the plurality of optical cables 4.

[0040] In the above technical solution, by setting a current-carrying component 11 and electrically connecting the current-carrying component 11 to the conductive layers of multiple optical cables 4, by energizing the conductive layer of one of the multiple optical cables 4, current can flow from one of the optical cables 4 through the current-carrying component 11 to the remaining optical cables 4, so as to conduct the multiple optical cables 4. The junction box of the OPGW de-icing optical cable can not only bear the de-icing voltage and current carrying function, but also allow current to flow through the conductive layers of multiple optical cables 4. In this way, a conductive path can be formed. The outer periphery of the conductive layer of the optical cable 4 through which the current flows will heat up, thereby melting the ice and snow covering the optical cable 4.

[0041] Preferably, in an embodiment of the present invention, there are two optical cables 4 and two first cable inlets, and each optical cable 4 enters the junction box of the OPGW de-icing optical cable through its corresponding first cable inlet.

[0042] Specifically, in the embodiments of the present invention, the material of the support member 7 can be one of rubber, plastic and ceramic.

[0043] Specifically, in the embodiments of the present invention, the material of the current-carrying member 11 is metal, such as copper.

[0044] Specifically, in the embodiments of the present invention, the flow path of the conductive path is as follows: the current flows through the power station from one of the two optical cables 4 to the current-carrying member 11, then from the current-carrying member 11 to the other optical cable 4, and finally from the other optical cable 4 to another power station or power user.

[0045] As shown in Figures 2, 3, 4, 6, 8, 9, and 10, in an embodiment of the present invention, the support member 7 includes: an installation member; and a support member 73, which is disposed on the installation member. The support member 73 has a first side and a second side disposed opposite to each other. The first side is provided with a current-carrying member 11, and the second side is provided with a fiber fusion tray 5. The support member 73 is provided with a plurality of limiting parts, which are located between the first side and the second side. Each limiting part has a limiting channel, and the plurality of limiting channels are correspondingly disposed with a plurality of first cable inlets.

[0046] With the above settings, multiple optical cables 4 enter multiple limiting channels through multiple first cable inlets. In this way, the limiting part can limit the optical cables 4, so as to facilitate the subsequent splicing of multiple optical cables 4.

[0047] Specifically, in the embodiments of the present invention, the fiber splicing tray 5 is fixedly connected to the support member 7, and the two optical cables 4 to be spliced ​​are covered with heat shrink tubing at the splice point to protect the optical fiber. The specific structure of the fiber splicing tray 5 can refer to the prior art, and will not be described in detail here.

[0048] Specifically, in the embodiments of the present invention, the support member 73 is a support plate, and a plurality of locking blocks 74 are provided on the first side of the support member 73. A plurality of locking slots are provided on the current-carrying member 11. The plurality of locking blocks and the plurality of locking slots are engaged in a corresponding locking fit to connect the current-carrying member 11 with the support member 7.

[0049] Preferably, in an embodiment of the present invention, there are two limiting portions.

[0050] As shown in Figure 8, in an embodiment of the present invention, the limiting part includes a plurality of first limiting plates 12 and a plurality of second limiting plates 13 for forming a limiting channel. The first limiting plates 12 and the second limiting plates 13 are alternately arranged along the extension direction of the optical cable 4.

[0051] In the above technical solution, the alternating arrangement of the first limiting plate 12 and the second limiting plate 13 can form a limiting channel, and each optical cable 4 can be fixed in the support member 7 through the corresponding first cable inlet via the first limiting plate 12 and the second limiting plate 13, thereby limiting the optical cable 4.

[0052] Specifically, as shown in FIG8, in the embodiment of the present invention, the first limiting plate 12 and the plurality of second limiting plates 13 each include a first plate segment and a second plate segment arranged at an angle. The first plate segment of the first limiting plate 12 is connected to the first side of the support member 73, and the second plate segment of the first limiting plate 12 is arranged toward the limiting channel. The first plate segment of the second limiting plate 13 is connected to the second side of the support member 73, and the second plate segment of the second limiting plate 13 is arranged toward the limiting channel.

[0053] As shown in Figures 1 to 6, in an embodiment of the present invention, the outer shell includes a base 1 and a cap 3. The base 1 is connected to the cap 3. A support member 7 is disposed on the base 1. The base 1 is provided with a plurality of first cable inlets. The support member 7 and the current-carrying member 11 are located inside the cap 3.

[0054] With the above configuration, on the one hand, multiple first cable inlets of the base 1 can fix multiple optical cables 4, and the multiple optical cables 4 can be connected to each other on the fiber splicing tray 5 after passing through multiple limiting channels from multiple first cable inlets; on the other hand, the cap 3 can achieve physical isolation between the internal space and the external space of the OPGW de-icing optical cable junction box, thereby protecting the internal components of the OPGW de-icing optical cable junction box and avoiding the internal components from being affected by external environmental factors. In this way, the service life of the OPGW de-icing optical cable junction box can be extended.

[0055] As shown in Figures 3, 4, 6, 8, 9, 10, and 11, in embodiments of the present invention, at least some of the mounting components are provided with a plurality of umbrella-shaped structures 72, which are spaced apart along the axial direction of the mounting components.

[0056] With the above configuration, when the base 1 is made of metal, the multiple umbrella-shaped structures 72 can increase the creepage distance, thus preventing the metal base 1 and the current-carrying member 11 from being broken down by current.

[0057] Specifically, in an embodiment of the present invention, the umbrella-shaped structure 72 is an umbrella skirt.

[0058] Specifically, in an embodiment of the present invention, the inner wall of the first cable inlet and the outer wall of the conductive layer 44 of the optical cable 4 are sealed by a conical sealing plug.

[0059] Specifically, in the embodiments of the present invention, the mounting component further includes a mounting base 71 and a support column. The support column is provided with a plurality of umbrella-shaped structures 72. The mounting base 71 is connected to the base 1, and the support component 73 is connected to the support column.

[0060] As shown in Figures 1, 2, 4, 5, and 6, in an embodiment of the present invention, the base 1 is provided with an annular groove, and the OPGW de-icing optical cable junction box further includes: a sealing ring 9, which is located between the cap 3 and the base 1, and is used to seal the connection between the cap 3 and the base 1; and an annular seal 10, which is located in the annular groove along the radial direction of the cap 3, and is located outside the sealing ring 9, and is used to seal the connection between the cap 3 and the base 1.

[0061] In the above technical solution, by setting a double sealing structure of sealing ring 9 and annular sealing element 10, the cap 3 and base 1 can be sealed, thus improving the sealing performance of the OPGW de-icing optical cable junction box.

[0062] Specifically, in the embodiments of the present invention, the depth of the annular groove is less than the height of the annular seal 10 (the vertical height of the annular seal 10 in Figure 5). In this way, the annular seal 10 can be pressed tightly in the annular groove, thereby sealing the cap 3 and the base 1 through the annular seal 10.

[0063] Specifically, in the embodiments of the present invention, the sealing ring 9 is an O-ring, and the annular seal 10 is a flat washer.

[0064] As shown in Figures 1, 2, 3, 4, 6, and 7, in an embodiment of the present invention, the OPGW de-icing optical cable junction box further includes multiple insulating sleeves 6. Each insulating sleeve 6 is disposed on the base 1 and located between the base 1 and the current-carrying member 11. The multiple insulating sleeves 6 are correspondingly disposed with multiple first cable inlets. Each insulating sleeve 6 includes a main body 61 and multiple umbrella-shaped members 62 located on the outer periphery of the main body 61 and spaced apart along the axial direction of the main body 61.

[0065] In the above technical solution, by setting multiple umbrella-shaped components 62, the creepage distance can be further increased to avoid the phenomenon of insufficient creepage distance of optical cable 4, thereby improving the electrical insulation performance. When the base 1 is made of metal material, it can prevent the metal base 1 and the current-carrying component 11 from being broken down by current. In this way, the safety of the OPGW de-icing optical cable junction box during de-icing operation can be improved.

[0066] Specifically, in an embodiment of the present invention, insulating lubricating oil can be applied to the insulation layer 43 of the optical cable 4 before installation, which makes the installation more convenient.

[0067] As shown in Figures 1 to 7, in embodiments of the present invention, the base 1 is made of metal material, and / or the cap 3 is made of non-metallic material.

[0068] Through the above settings, on the one hand, the base 1 can have a higher load-bearing capacity; on the other hand, in a high-voltage power environment, the non-metallic cap 3 can effectively prevent electrical short circuits between the internal live parts (the conductive layer of the optical cable 4) of the OPGW de-icing optical cable junction box and the external metal structure (such as the tower), thereby improving the overall electrical safety of the OPGW de-icing optical cable junction box.

[0069] Specifically, in the embodiments of the present invention, the insulating sleeve 6 is made of an elastic material and the inner diameter of the insulating sleeve 6 is D; the diameter of the insulating layer 43 of the optical cable 4 is d, where D is less than d. Since the insulating sleeve 6 has a certain elasticity, it can be fitted onto the outer periphery of the insulating layer 43.

[0070] Preferably, in an embodiment of the present invention, the insulating sleeve 6 is made of silicone.

[0071] Specifically, in the embodiments of the present invention, since the base 1 is made of metal material and the current-carrying member 11 is also made of metal material, and the current-carrying member 11 carries current, by setting the insulating sleeve 6, the creepage distance can be increased, thereby improving the insulation effect.

[0072] Specifically, in the embodiments of the present invention, the cap tube 3 is made of SMC (Sheet Molding Compound), and the strength of the sheet molding compound is similar to that of the aluminum cap tube, and the strength can reach more than 100 MPa.

[0073] In one embodiment, the base 1 is made of a non-metallic material.

[0074] As shown in Figure 4, in an embodiment of the present invention, the current-carrying member 11 is provided with a plurality of clamping cavities, and the plurality of clamping cavities are correspondingly arranged with a plurality of first cable inlets.

[0075] In the above technical solution, by setting a clamping cavity on the current-carrying member 11, each optical cable 4 can enter the corresponding clamping cavity through the corresponding first cable inlet and fit tightly against the inner wall of the corresponding clamping cavity, thereby realizing the electrical connection between multiple optical cables 4 and the current-carrying member 11. By energizing the conductive layer of one of the multiple optical cables 4, the current can flow from this optical cable 4 through the current-carrying member 11 to the remaining optical cables 4 to form a conductive channel. In this way, the junction box of the OPGW de-icing optical cable can bear the function of current carrying, thereby enabling the de-icing of multiple optical cables 4.

[0076] Preferably, in an embodiment of the present invention, there are two clamping cavities.

[0077] Example 1

[0078] As shown in Figures 3 and 4, in Embodiment 1 of the present invention, the current-carrying member 11 includes: a first clamping member, which has a first groove; a second clamping member, which has a second groove, and a plurality of second grooves are correspondingly arranged with a plurality of first grooves, each second groove and its corresponding first groove forming a clamping cavity; and a first connecting member 113 for connecting the first clamping member and the second clamping member.

[0079] With the above configuration, the first groove of the first clamping member and the second groove of the second clamping member can be connected to form a clamping cavity. In this way, the conductive layer 44 of the optical cable 4 can be tightly attached to the inner wall of the clamping cavity. By energizing the conductive layer of the optical cable 4, the conductive layer of the optical cable 4 transmits the current to the current-carrying member 11, and transmits the current-carrying member 11 to the conductive layer 44 of the remaining unenergized optical cables 4. In this way, the junction box of the OPGW de-icing optical cable can bear the function of current carrying, so that multiple optical cables 4 can be de-iced.

[0080] Specifically, in Embodiment 1 of the present invention, there are two first connectors 113, and the first connectors 113 are bolts. The first clamping member and the second clamping member have good current carrying performance after being locked by the first connectors 113. When melting ice and carrying a large current, the first clamping member and the second clamping member are both clamping blocks. In this way, the temperature of the current carrying member 11 is much lower than the temperature of the conductive layer 44 of the optical cable 4.

[0081] Specifically, in Embodiment 1 of the present invention, both the first groove and the second groove are arc-shaped grooves, and the shape of the clamping cavity formed by the two arc-shaped grooves is adapted to the arc-shaped surface of the conductive layer 44 of the optical cable 4.

[0082] Example 2

[0083] The difference between this embodiment and embodiment one lies in the specific structure of the current-carrying member 11. As shown in Figure 13, the current-carrying member 11 includes a second connector with multiple through holes and multiple annular fingers 83, each through hole having multiple annular fingers 83. The second connector is electrically connected to the multiple annular fingers 83, and a clamping chamber is formed within each annular finger 83. The multiple annular fingers 83 are spaced apart along the axial direction of the through holes.

[0084] With the above configuration, the annular contact 83 can clamp the outer periphery of the conductive layer 44 of the optical cable 4, and the conductive layer 44 of the optical cable 4 can be in close contact with the inner wall of the annular contact 83. In this way, not only can the optical cable 4 be fixed in the clamping cavity, but the conductive layer 44 of the optical cable 4 can also be electrically connected to the annular contact 83. Since the second connector is electrically connected to multiple annular contacts 83, the conductive layers 44 of multiple optical cables 4 can be electrically connected through multiple annular contacts 83 and the second connector. Thus, after energizing the conductive layer 44 of one of the multiple optical cables 4, current can also flow through the conductive layers 44 of the remaining optical cables 4. In this way, the junction box of the OPGW de-icing optical cable can not only carry current, but also melt the ice and snow around the multiple optical cables 4.

[0085] Specifically, in Embodiment 2 of the present invention, the annular contact finger 83 is a spring contact finger.

[0086] As shown in Figure 13, in the second embodiment of the present invention, the current-carrying component 11 further includes a plurality of mounting cylinders 81, which are installed in a plurality of through holes. The inner wall of each mounting cylinder 81 is provided with a plurality of annular limiting grooves 82. The outer end of each annular contact finger 83 is located in each annular limiting groove 82, and the inner end of each annular contact finger 83 protrudes out of each annular limiting groove 82. The plurality of annular contact fingers 83 are electrically connected to the second connector through the plurality of mounting cylinders 81.

[0087] With the above configuration, the ring contact 83 can provide multi-point contact, maintaining good electrical contact even when the junction box of the OPGW de-icing optical cable is subjected to vibration or slight displacement, thereby improving the stability of the electrical connection. The elasticity of the ring contact 83 can adapt to conductors of different diameters, ensuring reliable contact. Furthermore, the inner end of the ring contact 83 protrudes from the annular limiting groove 82, forming a stable electrical connection and reducing maintenance work caused by poor contact. The elasticity and self-locking characteristics of the ring contact 83 can maintain good contact for a long time, reducing the need for periodic inspection and adjustment.

[0088] It should be noted that, in the embodiments of the present invention, the inner end of the annular contact finger 83 refers to the end of the annular contact finger 83 facing the through hole, and the outer end of the annular contact finger 83 refers to the end of the annular contact finger 83 away from the through hole.

[0089] The other structures of Embodiment 2 of the present invention are the same as those of Embodiment 1, and will not be described again here.

[0090] Specifically, in the embodiments of the present invention, the maximum withstand rated voltage designed by the present invention is 25kV, the 1min power frequency withstand voltage reaches 45kV, and the insulation layer 43 of the optical cable 4 needs to reserve a certain length of distance. Since the junction box of the OPGW de-icing optical cable is a closed space without the influence of outdoor factors such as rainwater, the insulation distance is greatly shortened compared to the outdoor area.

[0091] Specifically, in the embodiments of the present invention, the de-icing OPGW optical cable of the present invention achieves current carrying capacity and electrical performance within the junction box of the OPGW de-icing optical cable, and the de-icing OPGW optical cable can achieve de-icing when grounded to each tower. Tests have verified that the power frequency withstand voltage for 1 minute can reach ±50kV, meeting the working requirement of ±25kV de-icing voltage.

[0092] Specifically, in an embodiment of the present invention, in order to reduce the installation resistance of the insulating sleeve 6, insulating oil is applied to the insulation layer 43 of the optical cable 4.

[0093] As shown in Figures 1 and 2, an embodiment of the present invention provides a connector device. The connector device includes the connector box for the aforementioned OPGW de-icing optical cable and an optical cable clamp 2, the optical cable clamp 2 being connected to the connector box for the aforementioned OPGW de-icing optical cable.

[0094] As shown in Figures 1 to 3, in the embodiments of the present invention, the optical cable clamp 2 includes a third connector 21 connected to the base 1. The third connector 21 has a plurality of second cable inlets spaced apart, and the plurality of second cable inlets are correspondingly arranged with a plurality of first cable inlets. The fourth connector 22 includes a first plate segment 221, a second plate segment 222 and a third plate segment 223 connected to each other and arranged at an angle to form a clamping space. The first plate segment 221 is connected to the base 1 and the third plate segment 223 is connected to the third connector 21.

[0095] In the above technical solution, on the one hand, multiple optical cables 4 enter multiple limiting channels through multiple second cable inlets of the third connector 21 and multiple first cable inlets, and enter the fiber splicing tray 5 through multiple limiting channels and achieve splicing on the fiber splicing tray 5; on the other hand, by setting the fourth connector 22, the joint device can be connected to the pole tower.

[0096] Specifically, in an embodiment of the present invention, there are two second cable inlets, and the third connector 21 is connected to the base 1 by bolts.

[0097] Specifically, in the embodiments of the present invention, the first plate segment 221 of the fourth connector 22 is connected to the base 1 by bolts, the second plate segment 222 is provided with mounting holes, and the connector device further includes a fixing clamp, which is provided with mounting holes. By passing the bolts through the mounting holes on the second plate segment 222 and the mounting holes of the fixing clamp in sequence, the fixing clamp can be fixed on the second plate segment 222, thereby using the fixing clamp to clamp the connector device on the tower.

[0098] Specifically, in the embodiments of the present invention, the specific structure of the optical cable clamp 2 can refer to the prior art, and will not be described in detail here.

[0099] The above-mentioned joint device has all the advantages of the joint box of the above-mentioned OPGW de-icing optical cable, which will not be repeated here.

[0100] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: by setting a current-carrying component, and the current-carrying component being electrically connected to the conductive layers of multiple optical cables, by energizing the conductive layer of one of the multiple optical cables, current can flow from one of the optical cables through the current-carrying component to the remaining optical cables in the multiple optical cables, so as to conduct multiple optical cables together. The junction box of the OPGW de-icing optical cable can not only bear the function of current carrying, but also allow current to flow through the conductive layers of multiple optical cables. In this way, a conductive path can be formed. The outer periphery of the conductive layer of the optical cable through which the current flows will heat up, thereby melting the ice and snow covering the optical cable.

[0101] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A junction box for an OPGW ice-melting optical cable, characterized in that, include: The outer casing is provided with a plurality of first cable inlets spaced apart, and a plurality of optical cables (4) extend into the outer casing through the plurality of first cable inlets; A support member (7) is disposed inside the housing, the support member (7) being used to support the optical cable (4) inside the housing, and the support member (7) being made of insulating material; A current-carrying member (11) is disposed on the support member (7), the current-carrying member (11) is made of conductive material, and the current-carrying member (11) is configured to be electrically connected to the conductive layers (44) of the plurality of optical cables (4); The support member (7) includes an installation member and a support member (73). The support member (73) is disposed on the installation member. The support member (73) has a first side and a second side disposed opposite to each other. The first side is provided with the current-carrying member (11), and the second side is provided with a fiber fusion tray (5). The support member (73) is provided with a plurality of limiting parts. The limiting parts are located between the first side and the second side. Each limiting part has a limiting channel. The plurality of limiting channels are correspondingly disposed with a plurality of first cable inlets.

2. The junction box for the OPGW de-icing optical cable according to claim 1, characterized in that, The current-carrying component (11) is provided with a plurality of clamping cavities, and the plurality of clamping cavities are provided corresponding to the plurality of first cable inlets.

3. The junction box for the OPGW de-icing optical cable according to claim 2, characterized in that, The current-carrying component (11) includes: A first clamping member, wherein the first clamping member is provided with a first groove; The second clamping member has a second groove, and a plurality of second grooves are provided corresponding to a plurality of first grooves. Each second groove and the corresponding first groove form a clamping cavity. The first connector (113) is used to connect the first clamping member and the second clamping member.

4. The junction box for the OPGW de-icing optical cable according to claim 2, characterized in that, The current-carrying component (11) includes: The second connector has multiple through holes inside it; Multiple annular fingers (83) are provided in each of the through holes. The second connector is electrically connected to the multiple annular fingers (83). A clamping chamber is formed in each annular finger (83). The multiple annular fingers (83) are spaced apart along the axial direction of the through hole.

5. The junction box for the OPGW de-icing optical cable according to claim 4, characterized in that, The current-carrying component (11) further includes a plurality of mounting cylinders (81), which are installed in a plurality of through holes. The inner wall of each mounting cylinder (81) is provided with a plurality of annular limiting grooves (82). The outer end of each annular contact (83) is located in each annular limiting groove (82), and the inner end of each annular contact (83) protrudes from each annular limiting groove (82). The plurality of annular contact (83) are electrically connected to the second connector through the plurality of mounting cylinders (81).

6. The junction box for the OPGW de-icing optical cable according to any one of claims 1 to 5, characterized in that, The limiting part includes a plurality of first limiting plates (12) and a plurality of second limiting plates (13) for forming the limiting channel, and the first limiting plates (12) and the second limiting plates (13) are alternately arranged along the extension direction of the optical cable (4).

7. The junction box for the OPGW de-icing optical cable according to any one of claims 1 to 5, characterized in that, At least a portion of the mounting component is provided with a plurality of umbrella-shaped structures (72), and the plurality of umbrella-shaped structures (72) are spaced apart along the axial direction of the mounting component.

8. The junction box for the OPGW de-icing optical cable according to any one of claims 1 to 5, characterized in that, The outer shell includes a base (1) and a cap (3). The base (1) is connected to the cap (3). The support member (7) is disposed on the base (1). The base (1) is provided with a plurality of first cable inlets. The support member (7) and the current-carrying member (11) are located inside the cap (3).

9. The junction box for the OPGW de-icing optical cable according to claim 8, characterized in that, The base (1) is provided with an annular groove, and the junction box of the OPGW de-icing optical cable also includes: A sealing ring (9) is located between the cap (3) and the base (1), and the sealing ring (9) is used to seal the connection between the cap (3) and the base (1); An annular seal (10) is located in the annular groove along the radial direction of the cap (3). The annular seal (10) is located outside the sealing ring (9). The annular seal (10) is used to seal the connection between the cap (3) and the base (1).

10. The junction box for the OPGW de-icing optical cable according to claim 8, characterized in that, The OPGW de-icing optical cable joint device further includes multiple insulating sleeves (6), each insulating sleeve (6) is disposed on the base (1), each insulating sleeve (6) is located between the base (1) and the current-carrying member (11), and the multiple insulating sleeves (6) are correspondingly disposed with multiple first cable inlets, each insulating sleeve (6) comprising: Main body (61); Multiple umbrella-shaped members (62) are connected to the outer periphery of the main body (61) and are spaced apart along the axial direction of the main body (61).

11. The junction box for the OPGW de-icing optical cable according to claim 8, characterized in that, The base (1) is made of metal; and / or the cap (3) is made of non-metal.

12. A connector device, characterized in that, The device includes an optical cable clamp (2) and a junction box for the OPGW de-icing optical cable according to any one of claims 1 to 11, wherein the optical cable clamp (2) and the junction box for the OPGW de-icing optical cable are connected.

13. The connector device according to claim 12, characterized in that, The optical cable clamp (2) includes: The third connector (21) is connected to the base (1). The third connector (21) is provided with a plurality of second cable inlets spaced apart, and the plurality of second cable inlets are provided in correspondence with the plurality of first cable inlets. The fourth connector (22) includes a first plate segment (221), a second plate segment (222) and a third plate segment (223) that are connected in sequence and arranged at an angle to form a clamping space. The first plate segment (221) is connected to the base (1) and the third plate segment (223) is connected to the third connector (21).

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