A high flame retardant power cable

Abstract

The application discloses a kind of high flame-retardant power cable, it is related to power cable technical field, including line body, the line body inside is installed with several cable lines along the circumferential direction equiangular, the cable line outside is sleeved with insulating sleeve, the insulating sleeve outside is embedded with shielding sleeve, the shielding sleeve outside is installed with airtight reinforcing mechanism, the airtight reinforcing mechanism includes air bag piece, the line body inside is filled with several air bag pieces at equidistant uniform at cable line outside position, the heat that can be emitted in the process of air flow in the present application is circulated and transferred in and out of cable, water absorbed by water-absorbing cotton and cable everywhere is evaporated and dissipated, double elimination of moisture is formed, double airtight insulation protection structure is constituted, the effectiveness of insulation work is guaranteed, the pressure of cable everywhere is more balanced, the bending resistance and compression resistance effect of cable is improved, the heat emitted by cable line can be used to preheat and keep warm cable main body, improve its cold resistance effect.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, specifically to a high flame-retardant power cable. Background Technology

[0002] Power cables can be made of special materials and processes, which make them low in smoke, harmless, heat-resistant, with good mechanical properties, safe and reliable. Moreover, they do not produce toxic gases when burning and have little impact on the environment. With their significant advantages, they are widely used in a variety of environments.

[0003] However, current power cables easily absorb moisture from the air, causing a decrease in the volume resistivity of the insulation layer. As a result, the cables have poor insulation performance during use, poor bending resistance, and insufficient cold resistance, making it impossible to achieve high flame retardancy and environmentally friendly safe use. Summary of the Invention

[0004] This invention provides a high flame-retardant power cable, which can effectively solve the problems mentioned in the background art, such as the current power cables easily absorbing moisture from the air, causing a decrease in the volume resistivity of the insulation layer, resulting in poor insulation performance during use, poor bending resistance, insufficient cold resistance, and inability to achieve high flame retardancy and environmentally friendly safe use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high flame-retardant power cable, comprising a wire body, wherein a plurality of cables are installed at equal angles along the circumferential direction inside the wire body, an insulating sleeve is sleeved on the outside of the cables, a shielding sleeve is embedded and sleeved on the outside of the insulating sleeve, and an airtightness enhancement mechanism is installed on the outside of the shielding sleeve.

[0006] The airtightness enhancement mechanism includes an airbag sheet;

[0007] The inside of the line body is filled with several airbags at equal intervals and uniformly located on the outside of the cable. Several hollow rings are uniformly sleeved on the outside of the shielding sleeve at equal intervals. Several conductive tubes are installed at equal angles along the circumferential direction on the side end face of the hollow ring. A limit block is installed on one side of the outer curved surface of the hollow ring.

[0008] An isolation tube is sleeved inside the line body at the position outside the airbag piece. A fixing groove is opened on the inner curved surface of the isolation tube at the position corresponding to the limiting block. Insertion tubes are symmetrically installed at the bottom of the fixing groove. Several outer strip seats are embedded at equal angles along the circumferential direction on the outer curved surface of the line body.

[0009] The outer strip seat has several inner clips evenly and equidistantly installed on its inner curved surface. The outer curved surface of the isolation bladder tube has a groove corresponding to the position of the inner clip. An outward protruding tube is installed at the bottom of the groove. A strip-shaped cover plate is embedded in the outer side of the outer strip seat. Several grid plates are evenly and equidistantly installed inside the outer strip seat. A flow tube is embedded in the middle of the side end face of the grid plate. A filler tube is embedded in the middle of the side end face of the airbag plate.

[0010] According to the above technical solution, a conductive socket is installed at one end of the cable, and a conductive plug is installed at the other end of the cable. The conductive plug and the conductive socket are fitted together, and the conductive plug and the conductive socket are fixedly connected to the sealing heads at both ends of the cable.

[0011] According to the above technical solution, the conductive tube is sleeved on the outside of the shielding sleeve, and the shielding sleeve is spiral-shaped. The shielding sleeve and the airbag sheet are both fitted with the conductive tube, and the airbag sheet is filled with nitrogen.

[0012] According to the above technical solution, the fixed slot and the groove are distributed adjacent to each other along the axis of the line body, and the fixed slot and the groove are respectively matched with the limiting block and the inner card head. The inner cavity of the hollow ring is connected to the inner cavity of the isolation capsule tube through the insertion hole and the insertion tube. The inner cavity of the isolation capsule tube is connected to the inner cavity of the outer strip seat through the outward protrusion tube.

[0013] According to the above technical solution, the end of the limiting block is symmetrically provided with insertion holes;

[0014] The packing tube is equipped with several grid plates that are evenly and equidistantly installed inside, and an inner tube is embedded in the middle of the side end face of the grid plate.

[0015] A sealing head is installed at the end of the line body. A sleeve is embedded in the middle of the side end face of the sealing head. Several connecting tubes are installed at equal angles along the circumferential direction on the outer curved surface of the sleeve. An inner tube is installed at the position of the outer strip seat on the side end face of the sealing head. An annular groove is opened inside the sealing head at the position of the inner tube.

[0016] According to the above technical solution, both the flow tube and the inner flow tube are mesh structures, and the outer strip seat located outside the flow tube and the packing tube located outside the inner flow tube are filled with absorbent cotton.

[0017] The inner wall of the sleeve fits into the outer wall of the packing tube. The length of the packing tube is greater than the length of the cable. The inner cavity of the outer strip seat is connected to the annular groove through an embedded tube. The annular groove is connected to the sleeve through a connecting tube.

[0018] According to the above technical solution, a dynamic self-adjusting mechanism is installed at the end of the sealing head, and the dynamic self-adjusting mechanism includes a shaped seat;

[0019] The sealing head end is embedded with several irregularly shaped seats at equal angles along the circumferential direction. A piston plate is slidably installed inside the irregularly shaped seats. A connecting rod is installed in the middle of the side end face of the piston plate. A piston pad is installed at the end of the connecting rod. Sliding tubes are symmetrically embedded and slidably installed on the side end face of the piston plate. A long guide tube is installed at one end of the sliding tube, and a short end cap is installed at the other end of the sliding tube. The short end cap and the long guide tube are located on both sides of the piston plate. A through-hole is opened on one side of the outer curved surface of the long guide tube. A side opening is opened on the edge of the outer curved surface of one short end cap, and a side opening is opened in the middle of the outer curved surface of the other short end cap.

[0020] The irregularly shaped seat has a flow hole on one side of the connecting rod and a connection hole on the other side of the connecting rod. A sealing baffle is installed inside the irregularly shaped seat at the position corresponding to the short end cap. A flow guide valve is embedded in the side end face of the irregularly shaped seat at the positions corresponding to the piston pad and the long guide tube. An air inlet pipe is installed at the end of the flow guide valve. An air outlet pipe is installed on one side of the outer curved surface of the irregularly shaped seat. A check valve is installed on the other side of the outer curved surface of the sleeve at the position corresponding to the end of the air outlet pipe.

[0021] A sealing sleeve is fitted onto the outer side of the sealing head end, and an airbag is installed inside the sealing sleeve. A connecting box is embedded in the middle of the side end face of the airbag, and sealing tubes are installed at both ends of the connecting box. An air valve is installed in the middle of the outer curved surface of the airbag.

[0022] According to the above technical solution, the sliding tube has an elliptical cross-section, the distance between the end of the flow hole and the end of the connecting hole along the axis of the connecting rod is equal to the sliding distance of the long guide tube, the sliding distance of the long guide tube is equal to the thickness of the sealing partition, and the thickness of the sealing partition is equal to the distance between the side opening and the side opening along the axis of the short end cap.

[0023] According to the above technical solution, the flow guide valve consists of an inlet one-way valve and an outlet one-way valve, and the flow guide valve located only on one side of the connection hole is an outlet one-way valve. The check valve is a one-way flow valve, and the end of the outlet pipe is connected to the check valve.

[0024] According to the above technical solution, the airbag is filled with clean air, the sealing tube fits into the sleeve, and the sealing head, conductive socket and conductive plug all fit into the airbag.

[0025] Compared with the prior art, the advantages of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use;

[0026] 1. Equipped with an airtight reinforcement mechanism, which works in conjunction with a hollow ring and a conductive tube to transfer and utilize the heat dissipated during cable operation, improving the flexibility and efficiency of temperature regulation during operation. Combined with the outer strip seat, inner clamp, strip cover plate, grid plate, flow tube, filler tube, grid plate, and inner through-tube, it can construct a main circulation path, promoting the circulation and transfer of heat dissipated by the cable inside and outside the cable during airflow. On one hand, it works with the airflow to promote the evaporation and dissipation of moisture absorbed by the absorbent cotton and various parts of the cable, achieving double moisture removal. Combined with the double airtight insulation protection structure formed by the isolation bladder tube and air bladder plate, it provides gaseous insulation protection while maintaining the volume resistivity of the traditional insulation structure, effectively improving the resistivity of the cable's insulation structure and ensuring the effectiveness of insulation work.

[0027] On the other hand, it can balance the temperature in all parts of the cable, improve the heat dissipation effect inside the cable, and improve the working stability, efficiency and safety of the cable. At the same time, when used in conjunction with the airbag, it can make the pressure in all parts of the cable more even, and improve the bending and compressive resistance of the cable. It can also use the heat emitted by the cable to preheat and insulate the cable body, ensure its mechanical properties and improve its cold resistance.

[0028] 2. By combining hollow rings, conduction tubes, limiting blocks, insertion holes, isolation bladders, fixing slots, insertion tubes, grooves, and protruding tubes, branch circulation paths can be constructed, which can improve the synchronous stability of heat exchange inside the cable, make the heat exchange work more comprehensive and meticulous, effectively reduce heat exchange blind spots, and make the temperature of each part of the cable more balanced during operation. With the support of the air bladder, the internal structure of the cable is more tightly fitted, improving its physical properties and expanding its pressure resistance and bending resistance. At the same time, it can effectively improve air tightness, isolate the oxygen required for combustion, improve its flame retardant properties, and make the cable safer during operation.

[0029] By combining sleeves, connecting pipes, embedded pipes, and annular grooves, circulation paths can be constructed between branch circulation paths and main circulation paths, as well as between main circulation paths. This makes the internal and external heat circulation paths of the cable more diverse and three-dimensional, significantly improving heat exchange efficiency and expanding the heat exchange range. It also further disperses and balances temperature and pressure, improves the cable's effective temperature and pressure regulation capability, and makes the cable's performance more balanced across all parts.

[0030] 3. Equipped with a dynamic self-adjusting mechanism, through the cooperation of a shaped seat, piston plate, connecting rod, and piston pad, a pressure difference amplification structure can be constructed. Combined with the guiding effect of a flow guide valve, inlet pipe, outlet pipe, and check valve, the pressure difference generated during cable operation can be amplified, ensuring sufficient power for airflow heat exchange and enabling more efficient and stable heat exchange. Simultaneously, in conjunction with a sliding tube, long guide cylinder, conduction port, short end cap, side port, flow hole, connection hole, and sealing partition, passive static adjustment can be transformed into active dynamic adjustment. On the one hand, it can fully utilize the initiative and flexibility of airflow circulation pressure regulation and heat exchange, making heat exchange regulation more stable and efficient, better matching the regulation operation with the cable's working load state, and improving the compatibility and stability of the regulation operation. On the other hand, it can make the regulation operation more timely and effective, improving regulation efficiency, reliability, and stability, and making the dynamic connection between various structures smoother and more stable.

[0031] 4. Through the sealing connection of the sealing sleeve, airbag gasket, connecting box, sealing tube, and air valve, the stability and sealing of the joint can be fully guaranteed, making the splicing of the cable more stable. The cable body, cable, insulation sleeve, shielding sleeve, sealing head, conductive socket, and conductive plug can be produced independently during the cable production process. After production, they can be uniformly spliced. By filling different clean gases and splicing different lengths, the finished products can be diversified and classified to improve product diversity, meet different user needs, improve ease of use and assembly uniformity. They can also be assembled into sets in disassembled form to further meet the user's need for initiative, improve the effective utilization rate of the cable, and make the application of the cable more diverse and rich.

[0032] In summary, this cable has more diversified production and application, is more flexible and reliable in use, has a high effective utilization rate, and can transfer and utilize the heat emitted by the cable during use, thereby simultaneously improving the cable's cold resistance, pressure and bending resistance, insulation protection performance, and heat dissipation and flame retardant performance, thus effectively improving the overall performance of the cable. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0034] In the attached diagram:

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the sealing head installation structure of the present invention;

[0037] Figure 3 This is a schematic diagram of the airbag cushion installation structure of the present invention;

[0038] Figure 4 This is a schematic diagram of the airbag installation structure of the present invention;

[0039] Figure 5 This is a schematic diagram of the cable installation structure of the present invention;

[0040] Figure 6 This is a schematic diagram of the irregular-shaped seat installation structure of the present invention;

[0041] Figure 7 This is a schematic diagram of the airtightness enhancement mechanism of the present invention;

[0042] Figure 8 This is a schematic diagram of the dynamic self-adjusting mechanism of the present invention;

[0043] Figure 9 This is a schematic diagram of the long guide tube installation structure of the present invention;

[0044] The diagram is labeled as follows: 100, wire body; 101, cable; 102, insulating sleeve; 103, shielding sleeve; 104, sealing head; 105, conductive socket; 106, conductive plug.

[0045] 200. Airtightness enhancement mechanism; 201. Airbag sheet; 202. Hollow ring; 203. Conductive tube; 204. Limiting block; 205. Insertion hole; 206. Isolation bladder tube; 207. Fixing slot; 208. Insertion tube; 209. Groove; 210. Outer protrusion tube; 211. Outer strip seat; 212. Inner clamp; 213. Strip cover plate; 214. Grid plate; 215. Flow tube; 216. Packing tube; 217. Grid plate; 218. Inner through tube; 219. Sleeve; 220. Connecting tube; 221. Embedded tube; 222. Annular groove;

[0046] 300. Dynamic self-adjusting mechanism; 301. Irregularly shaped seat; 302. Piston plate; 303. Connecting rod; 304. Piston pad; 305. Sliding tube; 306. Long guide tube; 307. Through port; 308. Short end cap; 309. Side port; 310. Side opening; 311. Flow hole; 312. Connecting hole; 313. Sealing partition; 314. Guide valve; 315. Air inlet pipe; 316. Air outlet pipe; 317. Check valve; 318. Sealing sleeve; 319. Airbag pad; 320. Connecting box; 321. Sealing tube; 322. Air valve. Detailed Implementation

[0047] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0048] Example: Figure 1-9As shown, the present invention provides a technical solution, a high flame retardant power cable, including a wire body 100, a plurality of cables 101 are installed at equal angles along the circumferential direction inside the wire body 100, an insulating sleeve 102 is sleeved on the outside of the cables 101, a shielding sleeve 103 is embedded and sleeved on the outside of the insulating sleeve 102, and an airtightness enhancement mechanism 200 is installed on the outside of the shielding sleeve 103.

[0049] The airtightness enhancement mechanism 200 includes an airbag sheet 201, a hollow ring 202, a conduction tube 203, a limiting block 204, an insertion hole 205, an isolation bladder tube 206, a fixing slot 207, an insertion tube 208, a groove 209, an outward protruding tube 210, an outer strip seat 211, an inner clamp head 212, a strip cover plate 213, a grid plate 214, a flow tube 215, a packing tube 216, a grid sheet 217, an inner through tube 218, a sleeve 219, a connecting tube 220, an embedded tube 221, and an annular groove 222;

[0050] Inside the cable body 100, at equal and even intervals outside the cable 101, are several air-filled bladders 201. A number of hollow rings 202 are evenly fitted onto the outside of the shielding sleeve 103. Several conductive tubes 203 are installed at equal angles along the circumferential direction on the side end faces of the hollow rings 202. The conductive tubes 203 are fitted onto the outside of the shielding sleeve 103, and the shielding sleeve 103 is spiral-shaped. Both the shielding sleeve 103 and the air-filled bladders 201 fit snugly against the conductive tubes 203. The air-filled bladders 201 are filled with nitrogen gas to improve the cable's heat exchange capacity. For thermal stability and efficiency, a limiting block 204 is installed on one side of the outer curved surface of the hollow ring 202. The end of the limiting block 204 is symmetrically provided with insertion holes 205. An isolation tube 206 is sleeved inside the line body 100 at the position outside the airbag plate 201. A fixing groove 207 is opened on the inner curved surface of the isolation tube 206 corresponding to the position of the limiting block 204. Insertion tubes 208 are symmetrically installed at the bottom of the fixing groove 207. Several outer strip seats 211 are embedded at equal angles along the circumferential direction on the outer curved surface of the line body 100.

[0051] A number of inner clips 212 are evenly and equidistantly installed on the inner curved surface of the outer strip seat 211. The fixing slots 207 and grooves 209 are distributed adjacently along the axis of the line body 100, and the fixing slots 207 and grooves 209 respectively fit into the limiting block 204 and the inner clips 212. The inner cavity of the hollow ring 202 is connected to the inner cavity of the isolation capsule 206 through the insertion hole 205 and the insertion tube 208. The inner cavity of the isolation capsule 206 is connected to the inner cavity of the outer strip seat 211 through the outward protrusion tube 210 to facilitate airflow. The outer curved surface of the isolation capsule 206 is provided with a groove 209 corresponding to the position of the inner clips 212. The bottom of the groove 209 is provided with an outward protrusion tube 210. A strip cover plate 213 is embedded and installed on the outer side of the outer strip seat 211. A number of grid plates 214 are evenly and equidistantly installed inside the outer strip seat 211.

[0052] A flow passage pipe 215 is embedded in the middle of the side end face of the grid plate 214, and a packing pipe 216 is embedded in the middle of the side end face of the airbag plate 201. Several grid plates 217 are evenly installed inside the packing pipe 216. An inner passage pipe 218 is embedded in the middle of the side end face of the grid plate 217. Both the flow passage pipe 215 and the inner passage pipe 218 are mesh structures. The outer strip seat 211 is filled with water-absorbing cotton at the position outside the flow passage pipe 215 and the packing pipe 216 is filled with water-absorbing cotton at the position outside the inner passage pipe 218 to ensure insulation and protection performance.

[0053] A sealing head 104 is installed at one end of the cable body 100. A conductive socket 105 is installed at one end of the cable 101, and a conductive plug 106 is installed at the other end of the cable 101. The conductive plug 106 and the conductive socket 105 are fitted together. The conductive plug 106 and the conductive socket 105 are fixedly connected to the sealing heads 104 at both ends of the cable body 100 to improve the ease of connection. A sleeve 219 is embedded in the middle of the side end face of the sealing head 104. A number of... The dry connecting pipe 220 and the sealing head 104 are equipped with an inner tube 221 at the position corresponding to the outer strip seat 211. The sealing head 104 has an annular groove 222 at the position corresponding to the inner tube 221. The inner wall of the sleeve 219 fits with the outer wall of the packing tube 216. The length of the packing tube 216 is greater than the length of the cable 101. The inner cavity of the outer strip seat 211 is connected to the annular groove 222 through the inner tube 221. The annular groove 222 is connected to the sleeve 219 through the connecting pipe 220 to ensure the stability of airflow.

[0054] The end of the sealing head 104 is equipped with a dynamic self-adjusting mechanism 300. The dynamic self-adjusting mechanism 300 includes a shaped seat 301, a piston plate 302, a connecting rod 303, a piston pad 304, a sliding tube 305, a long guide tube 306, a guide port 307, a short sealing head 308, a side port 309, a side port 310, a flow hole 311, a connecting hole 312, a sealing partition 313, a flow guide valve 314, an air inlet pipe 315, an air outlet pipe 316, a check valve 317, a sealing sleeve 318, an airbag pad 319, a connecting box 320, a sealing tube 321, and an air valve 322.

[0055] Several irregularly shaped seats 301 are embedded and installed at equal angles along the circumferential direction at the end of the sealing head 104. A piston plate 302 is slidably installed inside the irregularly shaped seat 301. A connecting rod 303 is installed in the middle of the side end face of the piston plate 302. A piston pad 304 is installed at the end of the connecting rod 303. A sliding tube 305 is symmetrically embedded and slidably installed on the side end face of the piston plate 302. A long guide tube 306 is installed at one end of the sliding tube 305. A short end cap 308 is installed at the other end of the sliding tube 305. The short end cap 308 and the long guide tube 306 are located on both sides of the piston plate 302. A guide opening 307 is opened on one side of the outer curved surface of the long guide tube 306. A side opening 309 is opened on the edge of the outer curved surface of one short end cap 308. A side opening 310 is opened in the middle of the outer curved surface of the other short end cap 308.

[0056] The irregular-shaped seat 301 has a flow hole 311 on one side of the connecting rod 303 and a connection hole 312 on the other side of the connecting rod 303. A sealing baffle 313 is installed inside the irregular-shaped seat 301 at the position corresponding to the short end cap 308. The sliding tube 305 has an elliptical cross-section. The distance between the end of the flow hole 311 and the end of the connection hole 312 along the axis of the connecting rod 303 is equal to the sliding distance of the long guide tube 306. The sliding distance of the long guide tube 306 is equal to the thickness of the sealing baffle 313. The thickness of the sealing baffle 313 is equal to the distance between the side opening 309 and the side opening 310 along the axis of the short end cap 308 to ensure the continuous stability of the pressurization operation.

[0057] A flow guide valve 314 is embedded in the side end face of the irregular seat 301 at the position corresponding to the piston pad 304 and the long guide tube 306. An air inlet pipe 315 is installed at the end of the flow guide valve 314. An air outlet pipe 316 is installed on one side of the outer curved surface of the irregular seat 301. A check valve 317 is installed on the outer curved surface of the other sleeve 219 at the position corresponding to the end of the air outlet pipe 316. The flow guide valve 314 consists of an air inlet check valve and an air outlet check valve. Only the flow guide valve 314 located on the side of the connection hole 312 is an air outlet check valve. The check valve 317 is a one-way flow valve. The end of the air outlet pipe 316 is connected to the check valve 317 to limit and guide the flow and prevent backflow.

[0058] A sealing sleeve 318 is fitted onto the outer side of the sealing head 104. An airbag 319 is installed inside the sealing sleeve 318 and filled with clean air. The sealing tube 321 fits into the sleeve 219. The sealing head 104, the conductive socket 105, and the conductive plug 106 all fit into the airbag 319 to improve the sealing at the joint. A connecting box 320 is embedded in the middle of the side end face of the airbag 319. Sealing tubes 321 are installed at both ends of the connecting box 320. An air valve 322 is installed in the middle of the outer curved surface of the airbag 319.

[0059] The working principle and usage process of this invention: When using this cable, firstly, select the appropriate number of wires 100 according to the actual required length and splice them yourself. Alternatively, you can select pre-assembled products according to the required length. During the splicing process, the sealing sleeve 318 is clipped onto the outside of the sealing head 104 on one wire 100, and the sealing head 104 on the other wire 100 is clipped into the sealing sleeve 318 from the other end. Here, the two sealing heads 104 clipped into the same sealing sleeve 318 should be equipped with conductive sockets 105 and conductive plugs 106 respectively, and the conductive plugs 106 should be aligned and inserted into the conductive sockets 105.

[0060] Then, clean air is injected into the airbag 319 through the air valve 322 using an external inflation device. The type of clean air can be selected according to actual needs. After the clean air enters the airbag 319, the airbag 319 will expand under pressure, simultaneously squeezing the sealing head 104, the conductive socket 105 and the conductive plug 106, ensuring the sealing while auxiliary locking the conductive socket 105 and the conductive plug 106.

[0061] The airflow then flows into the connecting box 320, enters the sleeve 219 through the sealing tube 321, enters the annular groove 222 through the connecting tube 220, enters the outer strip seat 211 through the inner tube 221, and enters the annular groove 222 in the sealing head 104 at the other end through the inner tube 221 on the other side. Then it enters the irregular seat 301 through the air inlet tube 315, enters the corresponding sleeve 219 through the air outlet tube 316, and finally flows back to the initial sleeve 219 through the inner tube 218. This flow path is the main circulation path. Through this path, the initial airflow pressure of the clean air inside each line 100 can be adjusted and limited.

[0062] During this process, under the guidance of the inner clamp head 212 and the outer protruding tube 210, some clean air will flow into the isolation bladder tube 206. The isolation bladder tube 206 will squeeze the outer cable body 100 and the inner air bladder plate 201 under the action of air pressure, and cooperate with the air bladder plate 201 to limit and buckle the internal cable 101, ensuring the compactness and stability of the internal structure of the cable. At the same time, it is equivalent to forming a double airtight insulation protection structure, ensuring the insulation, bending resistance and pressure resistance of the cable. Subsequently, the airflow will enter the hollow ring 202 under the guidance of the insertion tube 208 and the insertion hole 205, and fill each conduction tube 203. Here, the flow path is used as a branch circulation path, thus completing the splicing work between the cable bodies 100.

[0063] Correspondingly, during the cable production process, the wire body 100, cable 101, insulation sleeve 102, shielding sleeve 103, sealing head 104, conductive socket 105, and conductive plug 106 can be produced independently. After production, they can be uniformly spliced ​​according to the above steps. By filling different clean gases and splicing different lengths, the finished products can be diversified and classified to improve product diversity, meet different user needs, improve ease of use and assembly uniformity, or be assembled into sets in the form of loose parts to further meet the user's need for initiative and improve the effective utilization rate of the cable.

[0064] After the splicing of the line body 100 is completed, the cable 101 can be used normally after the relevant wiring is installed. During the use of the cable, as the power is transmitted, the cable 101 will heat up accordingly. The airflow inside the conduction tube 203 absorbs the heat emitted by the cable 101 and heats up and expands synchronously. Under the action of air pressure, it enters the hollow ring 202, and enters the isolation capsule tube 206 through the insertion tube 208 and the insertion hole 205, causing the air pressure inside the isolation capsule tube 206 to fluctuate synchronously. Then, it enters the outer strip seat 211 through the inner clamp head 212 and the outer protruding tube 210, causing the air pressure inside the main circulation path to fluctuate synchronously.

[0065] Subsequently, the airflow enters the annular groove 222 in the sealing head 104 where the irregular seat 301 is installed, and enters the irregular seat 301 through the air inlet pipe 315 and the flow guide valve 314. In the initial state, the connecting hole 312 and the side opening 309 are open, and the flow hole 311 and the side opening 310 are blocked. The airflow will pass through the long guide tube 306 on one side of the flow hole 311, and enter the irregular seat 301 through the side opening 309. This forces the piston plate 302 to drive the piston pad 304 to slide to one side of the piston pad 304 through the connecting rod 303, and press the clean air on one side of the piston pad 304 into the air outlet pipe 316. The clean air between the piston plate 302 and the piston pad 304 will be pressed into the connected long guide tube 306 through the connecting hole 312, and discharged into the air inlet pipe 315 through the corresponding flow guide valve 314, further increasing the air pressure inside the air inlet pipe 315.

[0066] As the piston plate 302 moves, when it comes into contact with the long guide tube 306, it pushes the long guide tube 306 to move synchronously, forcing the short end cap 308 to move synchronously under the drive of the sliding tube 305. This results in the connection hole 312 and the side opening 309 being blocked, while the flow hole 311 and the side opening 310 are open. At this time, the airflow through the long guide tube 306 on the side of the flow hole 311 will enter the irregular seat 301 through the flow hole 311, causing the piston plate 302 to drive the piston pad 304 to slide to one side of the piston plate 302 via the connecting rod 303, drawing clean gas into the irregular seat 301 to replenish the clean gas on the side of the piston pad 304. The clean gas on the side of the piston plate 302 will be pressed into the sliding tube 305 through the side opening 309 and discharged into the air inlet pipe 315 through the corresponding guide valve 314, thus performing directional pressure boosting compensation for the clean gas.

[0067] Until the piston plate 302 comes into contact with the short end cap 308, and pushes and forces the short end cap 308 to drag the long guide tube 306 to move through the sliding tube 305 and return to the initial state, this cycle repeats. In the cycle of piston plate 302, the end face difference between piston plate 302 and piston pad 304 is used to amplify the air pressure difference generated by the heat dissipated by cable 101, so as to promote the dynamic flow of clean air in the main circulation path and the branch circulation path.

[0068] When the clean airflow passes through the outer strip seat 211 and the filler tube 216, if it carries water vapor, it will be absorbed by the absorbent cotton on the outside of the flow tube 215 and the inner flow tube 218. Under the conduction of the isolation tube 206, the outer strip seat 211 and the filler tube 216, the heat emitted by the cable 101 will also circulate and transfer inside and outside the cable with the airflow. This balances the temperature of the cable, promotes the heat dissipation effect inside the cable, and improves its cold resistance. At the same time, the heat carried by the airflow will also cause the absorbent cotton and the water absorbed by the cable to evaporate and dissipate. With the double airtight insulation protection structure, the resistivity of the cable insulation structure is guaranteed.

[0069] In the above process, the driving force of the dynamic self-adjusting mechanism 300 mainly comes from the conversion of heat emitted by the cable 101. That is, during the operation of the cable 101, the greater the heat emitted, the greater the driving force obtained by the dynamic self-adjusting mechanism 300, the greater the amplified pressure difference, the faster the flow of clean air, and the faster the heat exchange and drying and removal of moisture. This can fully meet the requirements of working temperature and insulation resistance coefficient during the operation. Similarly, during this process, under the conduction of the connecting box 320 and the sealing tube 321, the airflow inside each main circulation path will also dynamically flow and connect between the entire spliced ​​cable body, further distributing heat and pressure evenly, ensuring the balance at each point. The airbag 319 will also expand accordingly during this process to ensure the sealing of the splice.

[0070] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high flame-retardant power cable, comprising a conductor (100), characterized in that: The cable body (100) has several cables (101) installed at equal angles along the circumference inside. An insulating sleeve (102) is sleeved on the outside of the cable (101). A shielding sleeve (103) is embedded on the outside of the insulating sleeve (102). An airtightness enhancement mechanism (200) is installed on the outside of the shielding sleeve (103). The airtightness enhancement mechanism (200) includes an airbag sheet (201); The inside of the line body (100) is filled with several airbags (201) at equal intervals and uniformly located outside the cable (101). Several hollow rings (202) are uniformly sleeved on the outside of the shielding sleeve (103). Several conductive tubes (203) are installed at equal angles along the circumferential direction on the side end face of the hollow ring (202). A limit block (204) is installed on one side of the outer curved surface of the hollow ring (202). An isolation tube (206) is sleeved inside the line body (100) at the position outside the airbag piece (201). A fixing groove (207) is opened on the inner curved surface of the isolation tube (206) at the position corresponding to the limiting block (204). Insertion tubes (208) are symmetrically installed at the bottom of the fixing groove (207). Several outer strip seats (211) are embedded at equal angles along the circumferential direction on the outer curved surface of the line body (100). The outer strip seat (211) has several inner clips (212) evenly installed on its inner curved surface at equal intervals. The outer curved surface of the isolation bladder tube (206) has a groove (209) at the position corresponding to the inner clip (212). The bottom of the groove (209) has an outer protruding tube (210). The outer strip seat (211) has a strip cover plate (213) embedded on its outer side. The outer strip seat (211) has several grid plates (214) evenly installed on its inner side at equal intervals. The grid plate (214) has a flow tube (215) embedded in the middle of its side end face. The airbag plate (201) has a filler tube (216) embedded in the middle of its side end face.

2. The high flame-retardant power cable according to claim 1, characterized in that, One end of the cable (101) is equipped with a conductive socket (105), and the other end of the cable (101) is equipped with a conductive plug (106). The conductive plug (106) and the conductive socket (105) are fitted together. The conductive plug (106) and the conductive socket (105) are respectively fixedly connected to the sealing heads (104) at both ends of the cable body (100).

3. The high flame-retardant power cable according to claim 1, characterized in that, The conductive tube (203) is sleeved on the outside of the shielding sleeve (103), and the shielding sleeve (103) is spiral-shaped. The shielding sleeve (103) and the airbag sheet (201) are both fitted with the conductive tube (203). The airbag sheet (201) is filled with nitrogen.

4. A high flame-retardant power cable according to claim 1, characterized in that, The fixed slot (207) and groove (209) are distributed adjacent to each other along the axis of the line body (100), and the fixed slot (207) and groove (209) are respectively matched with the limiting block (204) and the inner head (212). The inner cavity of the hollow ring (202) is connected to the inner cavity of the isolation capsule (206) through the insertion hole (205) and the insertion tube (208). The inner cavity of the isolation capsule (206) is connected to the inner cavity of the outer strip seat (211) through the outer protruding tube (210).

5. A high flame-retardant power cable according to claim 1, characterized in that, The limiting block (204) has symmetrically arranged insertion holes (205) at its end; The packing tube (216) has several grid plates (217) evenly installed at equal intervals inside, and an inner tube (218) is embedded in the middle of the side end face of the grid plate (217). A sealing head (104) is installed at the end of the line body (100). A sleeve (219) is embedded in the middle of the side end face of the sealing head (104). A plurality of connecting tubes (220) are installed at equal angles along the circumferential direction on the outer curved surface of one of the sleeves (219). An inner tube (221) is installed at the position corresponding to the outer strip seat (211) on the side end face of the sealing head (104). An annular groove (222) is opened inside the sealing head (104) at the position corresponding to the inner tube (221).

6. A high flame-retardant power cable according to claim 5, characterized in that, Both the flow tube (215) and the inner flow tube (218) are mesh structures. The outer strip seat (211) located outside the flow tube (215) and the packing tube (216) located outside the inner flow tube (218) are filled with absorbent cotton. The inner wall of the sleeve (219) fits into the outer wall of the packing tube (216). The length of the packing tube (216) is greater than the length of the cable (101). The inner cavity of the outer strip seat (211) is connected to the annular groove (222) through the inner tube (221). The annular groove (222) is connected to the sleeve (219) through the connecting tube (220).

7. A high flame-retardant power cable according to claim 5, characterized in that, The sealing head (104) is equipped with a dynamic self-adjusting mechanism (300) at its end, and the dynamic self-adjusting mechanism (300) includes a shaped seat (301). The sealing head (104) has several irregularly shaped seats (301) embedded at equal angles along the circumferential direction at its end. A piston plate (302) is slidably installed inside the irregularly shaped seat (301). A connecting rod (303) is installed in the middle of the side end face of the piston plate (302). A piston pad (304) is installed at the end of the connecting rod (303). Sliding tubes (305) are symmetrically embedded and slidably installed on the edge of the side end face of the piston plate (302). The sliding tubes (305) are... A long guide tube (306) is installed at one end of the sliding tube (305), and a short end cap (308) is installed at the other end of the sliding tube (305). The short end cap (308) and the long guide tube (306) are located on both sides of the piston plate (302). A guide port (307) is opened on one side of the outer curved surface of the long guide tube (306), a side opening (309) is opened on the edge of the outer curved surface of one of the short end caps (308), and a side opening (310) is opened in the middle of the outer curved surface of the other short end cap (308). The irregular seat (301) has a flow hole (311) on one side of the connecting rod (303) and a connection hole (312) on the other side of the connecting rod (303). A sealing partition (313) is installed inside the irregular seat (301) at the position corresponding to the short end cap (308). A flow guide valve (314) is embedded in the side end face of the irregular seat (301) at the positions corresponding to the piston pad (304) and the long guide cylinder (306). An air inlet pipe (315) is installed at the end of the flow guide valve (314). An air outlet pipe (316) is installed on one side of the outer curved surface of the irregular seat (301). A check valve (317) is installed on the outer curved surface of the other sleeve (219) at the position corresponding to the end of the air outlet pipe (316). A sealing sleeve (318) is fitted on the outer side of the sealing head (104). An airbag (319) is installed inside the sealing sleeve (318). A connecting box (320) is embedded in the middle of the side end face of the airbag (319). Sealing tubes (321) are installed at both ends of the connecting box (320). An air valve (322) is installed in the middle of the outer curved surface of the airbag (319).

8. A high flame-retardant power cable according to claim 7, characterized in that, The sliding tube (305) has an elliptical cross-section. The distance between the end of the flow hole (311) and the end of the connecting hole (312) along the axis of the connecting rod (303) is equal to the sliding distance of the long guide tube (306). The sliding distance of the long guide tube (306) is equal to the thickness of the sealing partition (313). The thickness of the sealing partition (313) is equal to the distance between the side opening (309) and the side opening (310) along the axis of the short end cap (308).

9. A high flame-retardant power cable according to claim 7, characterized in that, The flow guide valve (314) consists of an inlet check valve and an outlet check valve, and the flow guide valve (314) located only on the side of the connection hole (312) is an outlet check valve. The check valve (317) is a one-way flow valve, and the end of the outlet pipe (316) is connected to the check valve (317).

10. A high flame-retardant power cable according to claim 7, characterized in that, The airbag cushion (319) is filled with clean air, the sealing tube (321) fits into the sleeve (219), and the sealing head (104), conductive socket (105) and conductive plug (106) all fit into the airbag cushion (319).

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