A composite optical fiber assembly for voltage levels above 110kV

Abstract

This invention relates to the field of optical fiber communication technology, specifically to a composite optical fiber assembly for voltage levels above 110kV. The assembly includes an optical fiber core and a hollow glass fiber rod. The optical fiber core passes through the hollow glass fiber rod, and the gap between the optical fiber core and the hollow glass fiber rod is filled with silicone. The outer surface of the hollow glass fiber rod is coated with a sheath, and aluminum alloy flanges are glued to both ends of the sheath. A glue groove is provided inside the aluminum alloy flange, and one end of the aluminum alloy flange is connected to a glue injection tube for epoxy resin entry. The bottom of the glue injection tube is connected to a backflow preventer extending into the glue groove. A first conical rubber sealing plug and a second conical rubber sealing plug are fixedly connected to the outer surface of the optical fiber core, located inside the aluminum alloy flange. This multi-layer sealing method, employing silicone filling, a first conical rubber sealing plug, epoxy resin potting, and a second conical rubber sealing plug, effectively prevents moisture, dust, corrosive gases, and other external environmental contaminants from entering the optical fiber assembly.

Description

Technical Field

[0001] This invention relates to the field of optical fiber communication technology, specifically to a composite optical fiber assembly for voltage levels above 110kV. Background Technology

[0002] With the continuous development of society and the economy, the requirements of power systems for communication technology are increasing. Traditional power communication technologies, due to their simplicity, limited service methods, and small capacity, are no longer sufficient to meet the development needs of current power system engineering, especially high-voltage power grids. The stability and security of high-voltage power grids are directly related to the reliability and continuity of power supply, while the quality of power communication technology directly affects the operating efficiency and management level of the power grid. Therefore, developing an efficient, reliable, and high-capacity communication technology has become an urgent need for the power industry. Fiber optic communication technology, with its excellent insulation, strong anti-interference ability, and large communication capacity, has rapidly become the preferred choice for the power communication industry. Fiber optic communication has extremely high transmission rates and extremely low transmission losses, which can meet the high requirements of high-voltage power grids for real-time and accurate information. At the same time, fiber optic communication also has good electromagnetic compatibility and is not affected by electromagnetic interference generated by high-voltage transmission lines, ensuring stable transmission of communication signals.

[0003] For example, patent application CN213182138U discloses an optical fiber composite insulator assembly, comprising: a composite insulator, an optical fiber inserted into the composite insulator, an optical fiber flange located at the low-voltage end of the composite insulator assembly, and a pressure plate located inside the optical fiber flange and connected to the end of the composite insulator. The gap between the optical fiber and the composite insulator is filled with an organic insulating medium, and the pressure plate is used to prevent the organic insulating medium from seeping out. This application adopts a suspended installation, is less affected by earthquakes, is suitable for transmitting optical signals from the high-voltage end to the low-voltage end, has a simple and lightweight structure, low optical fiber loss, reliable data transmission, and insulation between the high-voltage and low-voltage ends.

[0004] The aforementioned existing technologies attempt to achieve sealing by filling the gap between the optical fiber and the composite insulator with epoxy resin, an organic insulating medium. However, this method has revealed significant problems in practical applications. Specifically, due to the inherent viscous nature of epoxy resin during the filling process, it is often difficult to completely eliminate air bubbles, leading to defects such as air bubbles and delamination after curing. This results in leakage at the ends of the optical fiber, becoming a common failure point. More seriously, epoxy resin has relatively insufficient toughness after solidification, making it difficult to withstand the challenges of long-term use in extreme outdoor environments such as high temperature, high humidity, alternating climates, and high voltage. Under such conditions, the sealing interface between the optical fiber and the composite insulator, especially the seal between the optical fiber and the inner hole of the glass fiber, is prone to defects or damage. Once the seal fails, external factors (such as moisture, dust, and dirt) may penetrate, not only affecting the quality of optical fiber communication but also potentially causing high-voltage breakdown accidents, causing significant interference to the operation of the power system, and seriously threatening the safety of personnel and equipment, posing a significant risk. Therefore, this application proposes a composite optical fiber assembly for voltage levels above 110kV. Summary of the Invention

[0005] The purpose of this invention is to provide a composite optical fiber assembly for voltage levels above 110kV, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a composite optical fiber assembly for voltage levels above 110kV, comprising an optical fiber core and a hollow glass fiber rod, wherein the optical fiber core passes through the hollow glass fiber rod, the gap between the optical fiber core and the hollow glass fiber rod is filled with silicone, the outer surface of the hollow glass fiber rod is coated with a sheath, and aluminum alloy flanges are glued to both ends of the sheath, the interior of the aluminum alloy flange is provided with a glue groove, the glue groove is provided with a plurality of cleaning blocks for cleaning the optical fiber core, one end of the aluminum alloy flange is connected to a glue injection tube for epoxy resin to enter, the bottom of the glue injection tube is connected to a backflow prevention tube extending into the glue groove, the interior of the aluminum alloy flange is provided with a compensation component for controlling the relative movement of the plurality of cleaning blocks, and a first conical rubber sealing plug and a second conical rubber sealing plug are fixedly connected to the outer surface of the optical fiber core and located inside the aluminum alloy flange.

[0007] Preferably, the compensation assembly includes multiple rotating columns rotatably connected inside the aluminum alloy flange, with a second protruding handle fixedly connected to the outer surface of each of the multiple rotating columns, and a sliding rod slidably connected to the inside of each of the multiple cleaning pressure blocks, and a movable handle rotatably connected to the multiple second protruding handles at one end of each of the sliding rods.

[0008] Preferably, the aluminum alloy flange is rotatably connected to an annular disc, and multiple pull handles are uniformly fixedly connected to the inner wall of the annular disc. The outer surfaces of the multiple rotating columns are all fixedly connected to a first protruding handle that is rotatably connected to the pull handle.

[0009] Preferably, the aluminum alloy flange has an internal gas receiving cylinder, and a driven piston rod adapted to it is slidably connected to the top of the gas receiving cylinder. The annular disc has an inclined surface inside, and a ball bearing that is rotatably connected to the inclined surface is slidably connected to the top of the driven piston rod.

[0010] Preferably, an air supply cylinder is fixedly connected inside the glue injection tube, and an active piston rod adapted to it is slidably connected to one end of the air supply cylinder. A piston adapted to the glue injection tube is fixedly connected to the end of the active piston rod away from the air supply cylinder. An air supply pipe that passes through the glue injection tube and connects to the bottom of the air receiving cylinder is connected to the top of the air supply cylinder.

[0011] Preferably, each end of the plurality of cleaning blocks is fixedly connected to a spring, and the glue groove is provided with a groove for the plurality of springs to be fixedly connected.

[0012] Preferably, the top of the injection tube is provided with a venting groove, and an air-blocking block is provided in the venting groove. The bottom ends of the air-blocking block are respectively fixedly connected to tension springs that are fixedly connected to the injection tube. The top of the air delivery cylinder is rotatably connected to an abutment handle that can abut against the air-blocking block, and the piston end of the active piston rod can abut against the bottom of the abutment handle.

[0013] Preferably, a return spring for resetting the active piston rod is fixedly connected inside the gas cylinder, and one end of the gas cylinder extends directly above the backflow preventer.

[0014] Preferably, a plurality of silicone umbrella skirts are fixedly connected to the outer surface of the sheath, and pressure equalizing rings are fixedly connected to the two aluminum alloy flanges and the sheath at the adhesive bonding points. A sealing pressure ring is provided inside the aluminum alloy flange and on the outer surface of the second conical rubber sealing plug. The sealing pressure ring is tightened to the second conical rubber sealing plug by bolts.

[0015] Preferably, both aluminum alloy flanges have injection holes on their tops for filling with silicone.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This component employs a multi-layered sealing system, including silicone filling, a first conical rubber sealing plug, epoxy resin potting, and a second conical rubber sealing plug. This multi-layered sealing not only provides a physical barrier but also enhances the overall sealing effect through the properties of different materials (such as the flexibility of silicone and the hardness of epoxy resin). This effectively prevents moisture, dust, and corrosive gases from entering the fiber optic assembly, protecting the fiber core from damage. The combination of soft and hard sealing, with silicone filling and rubber sealing plugs acting as soft sealing layers, can adapt to certain deformations and temperature changes, maintaining the sealing effect. Epoxy resin potting provides greater hardness and durability, further enhancing the reliability of the seal. In high-pressure environments, good sealing performance is one of the key factors in preventing electrical breakdown. The multi-layered sealing structure effectively isolates the fiber optic assembly from the external environment, reducing faults and accidents caused by electrical breakdown. By improving sealing performance, it reduces the erosion and damage to the fiber core from the external environment, thereby extending the overall service life of the fiber optic assembly.

[0018] 2. Before passing through the hollow glass fiber rod, the optical fiber core passes through multiple cleaning blocks. These blocks automatically remove impurities and dirt from the outer surface of the fiber core, ensuring its cleanliness and thus improving the quality and stability of optical fiber communication. During epoxy resin filling, the cleaning blocks temporarily move away from the fiber core, providing space for sufficient contact with the epoxy resin. After the epoxy resin solidifies, the cleaning blocks return to their original position and tightly adhere to the fiber core, forming an additional protective layer to prevent damage to the fiber core from the external environment. This is achieved through the cooperation of the injection tube and the backflow preventer, as well as the linkage between the piston and the gas-blocking block. This mechanism effectively reduces air bubbles and delamination during epoxy resin filling. As the epoxy resin gradually fills the aluminum alloy flange, the internal air is compressed and expelled through the notch in the injection tube. When the piston inside the injection tube moves under pressure, it not only pushes the epoxy resin filling process but also drives the air-blocking block to move upward and open the vent through the contact handle. This linkage effect closely links the epoxy resin filling process with the fiber optic core cleaning process, improving overall work efficiency. Driven by changes in gas pressure inside the air cylinder, the driven piston rod moves upward, which in turn drives the ring disk to rotate through the interaction between the inclined plane and the ball bearings. This design, which converts gas pressure into mechanical transmission, simplifies the structure and improves transmission efficiency. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a partial cross-sectional structural diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the exploded structure of the present invention;

[0022] Figure 4 This is a schematic cross-sectional view of the hollow glass fiber rod and sheath in this invention.

[0023] Figure 5 This is a schematic cross-sectional view of the aluminum alloy flange in this invention;

[0024] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point A in the middle;

[0025] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B;

[0026] Figure 8 This is a schematic diagram of the cleaning block structure in this invention;

[0027] Figure 9 This is a schematic cross-sectional view of the cleaning block in this invention;

[0028] Figure 10 For the present invention Figure 9 Enlarged schematic diagram of the structure at point C;

[0029] Figure 11 This is a schematic diagram of the structure in which multiple sliding rods cooperate with the ring disk in this invention;

[0030] Figure 12 This is a schematic cross-sectional view of the dispensing tube in this invention;

[0031] Figure 13 This is a schematic cross-sectional view of the annular disk in this invention;

[0032] Figure 14 This is a schematic diagram of the ring disk structure in this invention.

[0033] In the diagram: 100, optical fiber core; 101, hollow glass fiber rod; 102, silicone filler; 200, sheath; 201, silicone skirt; 202, equalizing ring; 203, aluminum alloy flange; 204, injection hole; 205, first conical rubber sealing plug; 206, second conical rubber sealing plug; 207, sealing pressure ring; 300, cleaning pressure block; 301, injection tube; 302, backflow preventer tube; 303, piston; 304. 305. Active piston rod; 306. Air supply cylinder; 307. Return spring; 308. Air supply pipe; 309. Air receiving cylinder; 310. Driven piston rod; 311. Ring disc; 312. Pull handle; 313. Rotary column; 314. First convex handle; 315. Slide rod; 316. Movable handle; 317. Spring; 318. Inclined surface; 319. Ball bearing; 400. Air blocking block; 401. Tension spring; 402. Contact handle. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figure 1 , Figure 2 as well as Figure 3 This invention provides a technical solution: a composite optical fiber assembly for voltage levels above 110kV, comprising an optical fiber core 100 and a hollow glass fiber rod 101, wherein the optical fiber core 100 passes through the hollow glass fiber rod 101, the gap between the optical fiber core 100 and the hollow glass fiber rod 101 is filled with silicone filler 102, the outer surface of the hollow glass fiber rod 101 is coated with a sheath 200, and aluminum alloy flanges 203 are glued to both ends of the sheath 200, wherein a glue groove is provided inside the aluminum alloy flange 203, one end of the aluminum alloy flange 203 is connected to a glue injection tube 301 for epoxy resin to enter, the bottom of the glue injection tube 301 is connected to a backflow preventer 302 extending into the glue groove, and a first conical rubber sealing plug 205 and a second conical rubber sealing plug 206 are fixedly connected to the outer surface of the optical fiber core 100 and located inside the aluminum alloy flange 203.

[0036] It is worth mentioning that the aluminum alloy flange 203 has threaded holes on its side and a vacuum hole at one end. After the optical fiber core 100 passes through the hollow glass fiber rod 101 and is bonded and formed, silicone filler 102 is high-pressure injected into the slit between the optical fiber core 100 and the hollow glass fiber rod 101 using a vacuum casting method, forming the first layer of sealing. This sealing body is a soft seal after solidification, with good sealing effect under high and low temperatures and slight bending. At the same time, the first conical rubber sealing plugs 205 at both ends form the second soft sealing layer. After the first sealing body is solidified, epoxy resin is injected into the aluminum alloy flanges 203 at both ends. The epoxy resin can be injected into the glue tank through the glue injection tube 301 to form the third hard sealing layer. After the epoxy resin filler cures, the second conical rubber sealing plug 206 and the sealing pressure ring 207 are installed and tightened with stainless steel screws. The second conical rubber sealing plug 206 forms the fourth sealing layer. The multi-layer sealing can effectively improve the sealing performance of the optical fiber assembly.

[0037] In summary, this component employs a multi-layered sealing system, including silicone filler 102, a first conical rubber sealing plug 205, epoxy resin potting, and a second conical rubber sealing plug 206. This multi-layered sealing not only provides a physical barrier but also enhances the overall sealing effect through the properties of different materials, such as the flexibility of silicone and the hardness of epoxy resin. This effectively prevents moisture, dust, and corrosive gases from entering the fiber optic assembly, protecting the fiber core from damage. The combination of soft and hard sealing, with silicone filler 102 and rubber sealing plugs acting as soft sealing layers, can adapt to certain deformations and temperature changes, maintaining the sealing effect. Epoxy resin potting provides greater hardness and durability, further enhancing the reliability of the seal. In high-pressure environments, good sealing performance is one of the key factors in preventing electrical breakdown. The multi-layered sealing structure effectively isolates the fiber optic assembly from the external environment, reducing faults and accidents caused by electrical breakdown. By improving sealing performance, it reduces the erosion and damage to the fiber core from the external environment, thereby extending the overall service life of the fiber optic assembly.

[0038] Example 2: Please refer to Figure 3 , Figure 4 as well as Figure 5 The present invention also provides a technical solution, which differs from the technical solution of Embodiment 1 as follows: A composite optical fiber assembly for voltage levels above 110kV, wherein a plurality of cleaning blocks 300 for cleaning the optical fiber core 100 are provided in the glue tank. When the optical fiber core 100 passes through the hollow glass fiber rod 101, it will first pass through the plurality of cleaning blocks 300. The plurality of cleaning blocks 300 can clean the outer surface of the optical fiber core 100. A compensation component for controlling the movement of the plurality of cleaning blocks 300 relative to each other is provided inside the aluminum alloy flange 203. The initial state of the plurality of cleaning blocks 300 is to contact the outer surface of the optical fiber core 100 to clean it. When epoxy resin needs to be filled, they need to be moved away from each other to allow the epoxy resin to fully contact the optical fiber core 100. At this time, the compensation component will drive the plurality of cleaning blocks 300 to move away from each other to provide working conditions for the epoxy resin.

[0039] Please refer to Figure 8 , Figure 9 as well as Figure 10The compensation component includes multiple rotating columns 312 rotatably connected inside the aluminum alloy flange 203. The outer surfaces of the multiple rotating columns 312 are respectively fixedly connected with second protruding handles 314. The interiors of the multiple cleaning blocks 300 are respectively fixedly connected with sliding rods 315 that are slidably connected to the glue tank. One end of the multiple sliding rods 315 is rotatably connected with a movable handle 316 that is rotatably connected to the multiple second protruding handles 314. The rotation of the multiple rotating columns 312 can pull the second protruding handles 314 to rotate, thereby driving the sliding rods 315 to be misaligned, so that the multiple cleaning blocks 300 are far apart from each other. The two ends of the multiple cleaning blocks 300 are respectively fixedly connected with springs 317. The glue tank has a groove for the multiple springs 317 to be fixedly connected. The multiple springs 317 can provide the cleaning blocks 300 with the power to reset, so that when the rotating columns 312 rotate, they drive the cleaning blocks 300 to reset and abut against the molded epoxy resin.

[0040] For further details, please refer to Figure 11 , Figure 13 as well as Figure 14 An annular disc 310 is rotatably connected inside the aluminum alloy flange 203. Multiple pull handles 311 are uniformly fixedly connected to the inner wall of the annular disc 310. The outer surfaces of multiple rotating columns 312 are all fixedly connected with first protruding shanks 313 that rotatably connect to the pull handles 311. Rotation of the annular disc 310 drives the multiple rotating columns 312 to rotate synchronously, thereby pulling multiple sliding rods 315 to move synchronously. An air receiving cylinder 308 is provided inside the aluminum alloy flange 203. The top of the air receiving cylinder 308 is slidably connected to... The driven piston rod 309 is adapted to the ring disk 310, which has an inclined surface 318 inside. The top of the driven piston rod 309 is rotatably connected to a ball bearing 319 that is slidably connected to the inclined surface 318. The interaction between the ball bearing 319 and the inclined surface 318 can drive the ring disk 310 to rotate slowly, thereby driving multiple rotating columns 312 to rotate. At the same time, the ball bearing 319 and the inclined surface 318 are slidably connected so that the two will not disengage. When the driven piston rod 309 is reset, it can pull the ring disk 310 to reset.

[0041] Please refer to Figure 5 , Figure 6 as well as Figure 12 An air supply cylinder 305 is fixedly connected inside the injection tube 301. One end of the air supply cylinder 305 is slidably connected to an active piston rod 304 adapted to it. The end of the active piston rod 304 away from the air supply cylinder 305 is fixedly connected to a piston 303 adapted to the injection tube 301. The piston 303 can prevent epoxy resin from flowing back and prevent external control from eroding the epoxy resin, thereby improving its service life. The top of the air supply cylinder 305 is connected to an air supply pipe 307 that passes through the injection tube 301 and connects to the bottom of the receiving cylinder 308.

[0042] For further details, please refer to Figure 6 , Figure 7 as well as Figure 13The top of the glue injection tube 301 is provided with a venting groove, and a gas blocking block 400 is provided in the venting groove. The bottom ends of the gas blocking block 400 are respectively fixedly connected to tension springs 401 that are fixedly connected to the glue injection tube 301. The top of the air supply cylinder 305 is rotatably connected to an abutment handle 402 that can abut against the gas blocking block 400, and the piston end of the active piston rod 304 can abut against the bottom of the abutment handle 402.

[0043] It is worth mentioning that a return spring 306 for resetting the active piston rod 304 is fixedly connected inside the air delivery cylinder 305. One end of the air delivery cylinder 305 extends directly above the backflow preventer 302, so that when the piston 303 moves under pressure, it will be positioned directly above the backflow preventer 302, allowing air bubbles to flow through the backflow preventer 302 towards the air-blocking block 400. When epoxy resin is poured into the injection tube 301, the piston 303 is displaced under pressure, thereby pushing the piston end of the active piston rod 304 to move inside the air delivery cylinder 305. When the piston 303 passes the backflow preventer 302, the epoxy resin will enter the interior of the aluminum alloy flange 203 through the backflow preventer 302. At this time, the piston end of the active piston rod 304 will contact the abutment handle 402, thereby driving one end of it to move, which in turn abuts the air-blocking block 400 to move upward, thereby opening the gap of the injection tube 301. The piston 303 is located directly above the backflow preventer 302. As the aluminum alloy flange 203 is gradually filled with epoxy resin, it will squeeze the air inside it to move upward and be discharged through the gap of the injection tube 301, reducing the amount of gas mixed in the epoxy resin.

[0044] Specifically, when the gas in the gas delivery cylinder 305 is compressed, it will be delivered to the interior of the receiving cylinder 308 through the gas delivery pipe 307. At this time, the increase in gas in the receiving cylinder 308 will push the driven piston rod 309 to move upward. At this time, the ball 319 at the top of the driven piston rod 309 will slide in the inclined surface 318, thereby driving the ring disk 310 to rotate. When the ring disk 310 rotates, it will drive multiple pull handles 311 to move together with it. The movement of the pull handles 311 will pull the first protruding handle 313 to move, thereby driving the rotating column 312 to rotate. At this time, the rotating column 312 will drive the second protruding handle 314 to rotate, pulling one end of the movable handle 316 to move, thereby pulling the slide rod 315 to move, so that the multiple cleaning pressure blocks 300 are far away from each other from the outer surface of the optical fiber core 100. As the epoxy resin gradually increases and solidifies, the piston 303 will reset, thereby driving the multiple cleaning pressure blocks 300 to reset and squeeze the epoxy resin, so that it completely adheres to the outer surface of the optical fiber core 100.

[0045] In summary, before passing through the hollow glass fiber rod 101, the optical fiber core 100 passes through multiple cleaning blocks 300. These cleaning blocks 300 automatically clean impurities and dirt from the outer surface of the optical fiber core 100, ensuring its cleanliness and thus improving the quality and stability of optical fiber communication. During the epoxy resin filling process, the cleaning blocks 300 can temporarily move away from the optical fiber core 100, providing space for sufficient contact of the epoxy resin. After the epoxy resin solidifies, the cleaning blocks 300 can return to their original position and tightly adhere to the optical fiber core 100, forming an additional protective layer to prevent damage to the optical fiber core 100 from the external environment. Through the cooperation of the injection tube 301 and the backflow preventer tube 302, and the piston 303 and the air-blocking block 4... The linkage mechanism effectively reduces air bubbles and delamination generated during epoxy resin filling. As the epoxy resin gradually fills the interior of the aluminum alloy flange 203, the internal air is squeezed out through the notch in the injection tube 301. When the piston 303 inside the injection tube 301 moves under pressure, it not only pushes the epoxy resin filling process but also drives the air-blocking block 400 to move upward and open the exhaust port through the contact handle 402. This linkage effect closely links the epoxy resin filling process with the cleaning process of the optical fiber core 100, improving the overall work efficiency. Driven by the gas pressure change in the air cylinder 308, the driven piston rod 309 moves upward, which in turn drives the ring disk 310 to rotate through the interaction between the inclined surface 318 and the ball bearing 319. This design, which converts gas pressure into mechanical transmission, simplifies the structure and improves transmission efficiency.

[0046] Working principle: First, the optical fiber core 100 is passed through the hollow glass fiber rod 101. The outer surface of the hollow glass fiber rod 101 is coated with a sheath 200 to make the two integrated. At the same time, a silicone umbrella skirt 201 is attached to the outside. It passes through the first conical rubber sealing plug 205 and the aluminum alloy flanges 203 at both ends and is glued together to form a whole. The silicone filler 102 is delivered to the slit between the optical fiber core 100 and the hollow glass fiber rod 101 through the injection hole 204 by high pressure filling to form a sealing layer. After epoxy resin is injected through the injection tube 301, the second conical rubber sealing plug 206 is installed. The sealing ring 207 is fixed to the aluminum alloy flange 203 with stainless steel screws. The pressure equalization ring 202 is installed at the joint between the metal ends and the silicone umbrella skirt 201 to form a multi-material seal with three layers of soft seal and one layer of hard seal, which greatly improves the consistency and safety of the product and ensures safe use in harsh outdoor weather with varying temperature and humidity.

[0047] When the optical fiber core 100 passes through the hollow glass fiber rod 101, it first passes through multiple cleaning blocks 300, which clean the outer surface of the optical fiber core 100. When epoxy resin is poured into the injection tube 301, the piston 303 is displaced by pressure, thereby pushing the piston end of the active piston rod 304 to move inside the air supply cylinder 305. When the piston 303 passes the backflow preventer 302, the epoxy resin will enter the interior of the aluminum alloy flange 203 through the backflow preventer 302. At this time, the piston end of the active piston rod 304 will contact the abutment handle 402, thereby driving one end to move, which in turn abuts the air block 400 to move upward, thereby opening the gap in the injection tube 301. The piston 303 is located directly above the backflow preventer 302. As the aluminum alloy flange 203 is gradually filled with epoxy resin, the air inside it will be squeezed upward and discharged through the gap in the injection tube 301, reducing the amount of gas mixed in the epoxy resin.

[0048] Simultaneously, when the gas inside the gas delivery cylinder 305 is compressed, it will be transported to the interior of the receiving cylinder 308 through the gas delivery pipe 307. At this time, the increase in gas inside the receiving cylinder 308 will push the driven piston rod 309 upward. At this time, the ball 319 at the top of the driven piston rod 309 will slide in the inclined surface 318, thereby driving the ring disk 310 to rotate. When the ring disk 310 rotates, it will drive multiple pull handles 311 to move along with it. The movement of the pull handles 311 will pull the first protruding handle 313 to move, thereby driving the rotating column 312 to rotate. At this time, the rotating column 312 will drive the second protruding handle 314 to rotate, pulling one end of the movable handle 316 to move, thereby pulling the slide rod 315 to move. This makes the multiple cleaning pressure blocks 300 move away from each other from the outer surface of the optical fiber core 100. As the epoxy resin gradually increases and solidifies, the piston 303 will reset, thereby driving the multiple cleaning pressure blocks 300 to reset and squeeze the epoxy resin, so that it completely adheres to the outer surface of the optical fiber core 100, thereby forming an effective seal.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite optical fiber assembly for voltage levels above 110kV, comprising an optical fiber core (100) and a hollow glass fiber rod (101), characterized in that: The optical fiber core (100) passes through the hollow glass fiber rod (101). The gap between the optical fiber core (100) and the hollow glass fiber rod (101) is filled with silicone filler (102). The outer surface of the hollow glass fiber rod (101) is coated with a sheath (200), and aluminum alloy flanges (203) are glued to both ends of the sheath (200). The aluminum alloy flanges (203) have glue grooves inside, and multiple cleaning blocks (3) for cleaning the optical fiber core (100) are provided in the glue grooves. 00), one end of the aluminum alloy flange (203) is connected to a glue injection tube (301) for epoxy resin to enter, the bottom of the glue injection tube (301) is connected to a backflow prevention tube (302) extending into the glue tank, the interior of the aluminum alloy flange (203) is provided with a compensation component for controlling the relative movement of multiple cleaning pressure blocks (300), and the outer surface of the optical fiber core (100) and the interior of the aluminum alloy flange (203) are fixedly connected with a first conical rubber sealing plug (205) and a second conical rubber sealing plug (206).

2. A composite optical fiber assembly for voltage levels above 110kV according to claim 1, characterized in that: The compensation assembly includes a plurality of rotating columns (312) rotatably connected inside the aluminum alloy flange (203). The outer surfaces of the plurality of rotating columns (312) are respectively fixedly connected with second protruding handles (314). The interiors of the plurality of cleaning pressure blocks (300) are respectively fixedly connected with sliding rods (315) that are slidably connected to the glue tank. One end of the plurality of sliding rods (315) is rotatably connected with a movable handle (316) that is rotatably connected to the plurality of second protruding handles (314).

3. A composite optical fiber assembly for voltage levels above 110kV according to claim 2, characterized in that: The aluminum alloy flange (203) is rotatably connected to an annular disc (310), and a plurality of pull handles (311) are uniformly fixedly connected to the inner wall of the annular disc (310). The outer surfaces of the plurality of rotating columns (312) are all fixedly connected to a first protruding shank (313) that is rotatably connected to the pull handle (311).

4. A composite optical fiber assembly for voltage levels above 110kV according to claim 3, characterized in that: The aluminum alloy flange (203) is provided with an air receiving cylinder (308) inside. The top of the air receiving cylinder (308) is slidably connected to a driven piston rod (309) adapted to it. The ring disc (310) is provided with an inclined surface (318) inside. The top of the driven piston rod (309) is rotatably connected to a ball bearing (319) that is slidably connected to the inclined surface (318).

5. A composite optical fiber assembly for voltage levels above 110kV according to claim 4, characterized in that: An air supply cylinder (305) is fixedly connected inside the glue injection tube (301). One end of the air supply cylinder (305) is slidably connected to an active piston rod (304) adapted to it. The end of the active piston rod (304) away from the air supply cylinder (305) is fixedly connected to a piston (303) adapted to the glue injection tube (301). The top of the air supply cylinder (305) is connected to an air supply pipe (307) that passes through the glue injection tube (301) and connects to the bottom of the air receiving cylinder (308).

6. A composite optical fiber assembly for voltage levels above 110kV according to claim 2, characterized in that: Each of the multiple cleaning blocks (300) has a spring (317) fixedly connected to both ends, and the groove is provided in the glue groove for the multiple springs (317) to be fixedly connected.

7. A composite optical fiber assembly for voltage levels above 110kV according to claim 5, characterized in that: The top of the glue injection tube (301) is provided with a venting groove, and a gas blocking block (400) is provided in the venting groove. The bottom ends of the gas blocking block (400) are respectively fixedly connected to tension springs (401) that are fixedly connected to the glue injection tube (301). The top of the air delivery cylinder (305) is rotatably connected to an abutment handle (402) that can abut against the gas blocking block (400), and the piston end of the active piston rod (304) can abut against the bottom of the abutment handle (402).

8. A composite optical fiber assembly for voltage levels above 110kV according to claim 5, characterized in that: The gas cylinder (305) is internally fixedly connected to a return spring (306) for resetting the active piston rod (304), and one end of the gas cylinder (305) extends directly above the backflow preventer (302).

9. A composite optical fiber assembly for voltage levels above 110kV according to claim 2, characterized in that: Multiple silicone umbrella skirts (201) are fixedly connected to the outer surface of the sheath (200). Pressure equalizing rings (202) are fixedly connected to the two aluminum alloy flanges (203) and the adhesive bonding area of ​​the sheath (200). A sealing pressure ring (207) is provided inside the aluminum alloy flange (203) and on the outer surface of the second conical rubber sealing plug (206). The sealing pressure ring (207) is tightened to the second conical rubber sealing plug (206) by bolts.

10. A composite optical fiber assembly for voltage levels above 110kV according to claim 1, characterized in that: Both of the aluminum alloy flanges (203) have injection holes (204) on their tops, which are used for injecting silicone filler (102).

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