High-flame-retardant power cable

Abstract

The invention discloses a high-flame-retardant power cable, and relates to the technical field of power cables, the high-flame-retardant power cable comprises a wire body, a plurality of cables are installed in the wire body in the circumferential direction at equal angles, the cables are sleeved with an insulating sleeve, the insulating sleeve is sleeved with a shielding sleeve in an embedded mode, and an airtight enhancing mechanism is installed on the outer side of the shielding sleeve. According to the cable, heat dissipated by the cable can be promoted to circularly flow and transfer inside and outside the cable in the airflow flowing process, and water absorbed by the absorbent cotton and all positions of the cable is promoted to evaporate and dissipate; the cable has the advantages that double moisture removal is formed, a double airtight insulation protection structure is formed, effectiveness of insulation work is guaranteed, pressure at all positions of the cable is more balanced, bending resistance and compression resistance of the cable are improved, heat emitted by the cable can be used for preheating and heat preservation of the cable body, and cold resistance of the cable body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of power cables, in particular to a highly flame-retardant power cable. Background Art

[0002] Power cables can be made of special materials and processes. They are low-smoke, harmless, heat-resistant, have good mechanical properties, are safe and reliable, and do not produce toxic gases when burned, with little impact on the environment. They are widely used in a variety of environments with their significant advantages. However, current power cables easily absorb moisture in the air, causing the volume resistivity of the insulation layer to decrease, resulting in poor insulation performance of the cables during use. In addition, they have poor bending resistance and insufficient cold resistance, making it impossible to achieve high flame retardancy and environmentally friendly safe use. Summary of the invention

[0003] The present invention provides a highly flame-retardant power cable, which can effectively solve the problem that the current power cable mentioned in the above background technology is easy to absorb moisture in the air, causing the volume resistivity of the insulation layer to decrease, so that the insulation performance of the cable is poor during use, and the bending resistance is poor, the cold resistance is insufficient, and the high flame retardancy and environmentally friendly safe use cannot be achieved.

[0004] To achieve the above object, the present invention provides the following technical solution: a highly flame-retardant power cable, comprising a wire body, 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 airtight reinforcement mechanism is installed on the outside of the shielding sleeve; The airtight enhancement mechanism includes an airbag sheet; The inside of the wire body is evenly filled with a number of airbag sheets at an even distance outside the cable, the outside of the shielding sleeve is evenly sleeved with a number of hollow rings, the side end faces of the hollow rings are installed with a number of conductive tubes at equal angles along the circumferential direction, and a limit block is installed on one side of the outer curved surface of the hollow ring; An isolation bag tube is sleeved inside the wire body at the position outside the airbag sheet, a fixed card slot is opened at the position of the limit card block corresponding to the inner curved surface of the isolation bag tube, and a plug is symmetrically installed at the bottom of the fixed card slot, and a plurality of outer strip seats are embedded and installed at equal angles along the circumferential direction on the outer curved surface of the wire body; A number of inner clamps are evenly and equidistantly installed on the inner curved surface of the outer strip seat, a groove is provided on the outer curved surface of the isolation bag tube at the position corresponding to the inner clamp, an outer convex tube is installed at the bottom of the groove, a strip cover plate is embedded and installed on the outer side of the outer strip seat, a number of grid plates are evenly and equidistantly installed inside the outer strip seat, a flow tube is embedded and installed in the middle of the side end face of the grid plate, and a stuffing tube is embedded and installed in the middle of the side end face of the airbag sheet.

[0005] 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, and the conductive plug fits with the conductive socket, and the conductive plug and the conductive socket are fixedly connected to the sealing heads at both ends of the cable body respectively.

[0006] 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 matched with the conductive tube, and the airbag sheet is filled with nitrogen.

[0007] According to the above technical solution, the fixed slot and the groove are adjacently distributed along the axial direction of the linear body, and the fixed slot and the groove are respectively matched with the limit block and the inner clamping head, the inner cavity of the hollow ring is connected with the inner cavity of the isolation bag tube through the socket and the insert tube, and the inner cavity of the isolation bag tube is connected with the inner cavity of the outer bar seat through the external convex tube.

[0008] According to the above technical solution, the end of the limit block is symmetrically provided with a socket; A plurality of grid sheets are evenly and equidistantly installed inside the filler tube, and an inner through pipe is embedded and installed in the middle of the side end surface of the grid sheet; A sealing head is installed at the end of the wire body, a sleeve is embedded in the middle of the side end face of the sealing head, a plurality of connecting tubes are installed at equal angles along the circumferential direction on the outer curved surface of the sleeve, an embedded tube is installed at the position of the side end face of the sealing head corresponding to the outer strip seat, and an annular groove is opened inside the sealing head at the position corresponding to the embedded tube.

[0009] According to the above technical solution, the through-flow pipe and the inner through-flow pipe are both mesh structures, and the inside of the outer bar seat located outside the through-flow pipe and the inside of the filling pipe located outside the inner through-flow pipe are both filled with absorbent cotton; The inner wall of the sleeve fits with the outer wall of the stuffing tube, the length of the stuffing tube is greater than the length of the cable, the inner cavity of the outer bar seat is connected to the annular groove through an embedded tube, and the annular groove is connected to the sleeve through a connecting tube.

[0010] 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 special-shaped seat; The end of the sealing head is embedded with a plurality of special-shaped seats at equal angles along the circumferential direction, a piston plate is slidably installed inside the special-shaped seat, a connecting rod is installed in the middle of the side end surface of the piston plate, a piston pad is installed at the end of the connecting rod, and a sliding tube is symmetrically embedded and slidably installed at the edge of the side end surface of the piston plate, a long guide cylinder is installed at one end of the sliding tube, and a short sealing head is installed at the other end of the sliding tube, and the short sealing head and the long guide cylinder are respectively located on both sides of the piston plate, a conducting port is opened on one side of the outer curved surface of the long guide cylinder, an edge opening is opened on the edge of the outer curved surface of one of the short sealing heads, and a side opening is opened in the middle of the outer curved surface of the other short sealing head; A flow hole is provided inside the special-shaped seat at one side of the connecting rod, a connection hole is provided inside the special-shaped seat at the other side of the connecting rod, a sealing baffle is installed at the position corresponding to the short head inside the special-shaped seat, a guide valve is embedded and installed at the position corresponding to the piston pad and the long guide cylinder on the side end surface of the special-shaped seat, an air inlet pipe is installed at the end of the guide valve, an air outlet pipe is installed on one side of the outer curved surface of the special-shaped seat, and a check valve is installed at the position corresponding to the end of the air outlet pipe on the other outer curved surface of the sleeve; A sealing sleeve is sleeved on the outer side of the sealing head end, an airbag cushion is installed inside the sealing sleeve, a connecting box is embedded in the middle of the side end surface of the airbag cushion, sealing tubes are installed at both ends of the connecting box, and an air valve is installed in the middle of the outer curved surface of the airbag cushion.

[0011] According to the above technical solution, the cross-section of the sliding tube is elliptical, the spacing 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 spacing between the edge opening and the side opening along the axis of the short head.

[0012] According to the above technical solution, the guide valve is composed of an air inlet check valve and an air outlet check valve, and the guide valve located only on one side of the connecting hole is the air outlet check valve, the check valve is a one-way flow valve, and the end of the air outlet pipe is connected to the check valve.

[0013] According to the above technical solution, the airbag cushion is filled with clean air, the sealing tube is matched with the sleeve, and the sealing head, the conductive socket and the conductive plug are all matched with the airbag cushion.

[0014] Compared with the prior art, the invention has the following beneficial effects: the invention has a scientific and reasonable structure and is safe and convenient to use; 1. An airtight reinforcement mechanism is provided. Through the cooperation of the hollow ring and the conduction tube, the heat emitted by the cable during operation can be transferred and utilized, thereby improving the flexibility and efficiency of temperature regulation during operation. In cooperation with the outer bar seat, the inner clamp head, the strip cover plate, the grid plate, the flow tube, the filler tube, the grid sheet and the inner through tube, a main circulation path can be constructed, which can promote the heat emitted by the cable to circulate and transfer inside and outside the cable during the flow of air. On the one hand, in cooperation with the blowing of the air flow, the water absorbed by the absorbent cotton and the cable is promoted to evaporate and dissipate, and in cooperation with the absorbent cotton, double removal of water is achieved. The double airtight insulation protection structure composed of the isolation bag tube and the air bag sheet can constitute gaseous insulation protection while ensuring the volume resistivity of the traditional insulation structure, which can effectively improve the resistivity of the insulation structure of the cable and ensure the effectiveness of the insulation work; On the other hand, it can balance the temperature of various 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, in conjunction with the airbag sheet, it can make the pressure of various parts of the cable more balanced and improve the cable's resistance to bending and compression. The heat emitted by the cable can be used to preheat and insulate the cable body, ensure the mechanical properties of its structure, and improve its cold resistance.

[0015] 2. Through the coordination of hollow rings, conduction tubes, limit blocks, jacks, isolation tubes, fixed slots, inserts, grooves and external convex tubes, a branch circulation path can be constructed, which can improve the synchronous stability of the heat exchange work inside the cable, make the heat exchange work more comprehensive and meticulous, effectively reduce the heat exchange blind area, and make the temperature of each part of the cable more balanced during the working process. With the support of the airbag sheet, the internal structure of the cable can be more closely fitted, improve its physical properties, and expand its compression and bending resistance. At the same time, it can effectively improve the air tightness, isolate the oxygen required for combustion, improve its flame retardant performance, and make the working process of the cable safer; By cooperating with sleeves, connecting tubes, embedded tubes and annular grooves, circulation pathways can be constructed between branch circulation pathways and main circulation pathways and between main circulation pathways, making the internal and external heat circulation pathways of the cable more diversified and three-dimensional, greatly improving the heat exchange efficiency, and increasing the heat exchange range, further dispersing and balancing the temperature and pressure, improving the effective temperature and pressure regulation capability of the cable, and making the performance of the cable more balanced.

[0016] 3. A dynamic self-adjusting mechanism is provided. Through the cooperation of the special-shaped seat, piston plate, connecting rod and piston pad, a pressure difference amplification structure can be constructed. With the diversion effect of the guide valve, air inlet pipe, air outlet pipe and check valve, the pressure difference generated during the cable operation process can be amplified to ensure the power sufficiency of the airflow heat exchange, so that the heat exchange work can be carried out more efficiently and stably. At the same time, in cooperation with the sliding tube, long guide tube, guide port, short head, side port, side port, flow hole, connecting hole and sealing partition, passive static adjustment can be transformed into active dynamic adjustment. On the one hand, it can give full play to the initiative and flexibility of the airflow circulation pressure regulation and heat exchange work, make the heat exchange adjustment work more stable and efficient, make the adjustment work more matched with the cable working load state, and improve the compatibility and stability of the adjustment work. On the other hand, it can make the adjustment work more timely and effective, improve the adjustment efficiency and the reliability and stability of the adjustment work, and make the dynamic connection work between the structures smoother and more stable.

[0017] 4. The sealing connection of the sealing sleeve, airbag cushion, connection box, sealing tube and air valve can fully ensure the stability and sealing of the joints, making the splicing of the wire body more stable. The wire body, cable, insulating sleeve, shielding sleeve, sealing head, conductive socket and conductive plug can be produced independently during the cable production process, and then spliced ​​together after production. The finished products can be classified in a diversified way by filling different clean gases and splicing different lengths to improve product diversity, meet different user needs, improve ease of use and assembly uniformity, and can also be assembled into sets in the form of loose parts to further meet users' needs for subjective initiative, improve the effective utilization rate of cables, and make the application of cables more diverse and rich.

[0018] In summary, the production and application of this cable are more diversified, it is more flexible and reliable during use, the effective utilization rate of the cable is high, and at the same time, the heat emitted by the cable can be transferred and utilized during use, thereby simultaneously improving the cable's cold resistance, compression and bending resistance, insulation protection performance, and heat dissipation and flame retardant performance, thereby effectively improving the cable's comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0020] In the attached picture: Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the sealing head installation structure of the present invention; Figure 3 is a schematic diagram of the airbag cushion installation structure of the present invention; Figure 4 It is a schematic diagram of the airbag sheet installation structure of the present invention; Figure 5 is a schematic diagram of the cable installation structure of the present invention; Figure 6 It is a schematic diagram of the installation structure of the special-shaped seat of the present invention; Figure 7 It is a schematic diagram of the structure of the airtight enhancement mechanism of the present invention; Figure 8 It is a structural schematic diagram of the dynamic self-adjusting mechanism of the present invention; Fig. 9 It is a schematic diagram of the long guide tube installation structure of the present invention; Reference numerals in the figure: 100, wire body; 101, cable; 102, insulating sleeve; 103, shielding sleeve; 104, sealing head; 105, conductive socket; 106, conductive plug; 200, airtight reinforcement mechanism; 201, airbag sheet; 202, hollow ring; 203, conduction tube; 204, limit block; 205, plug hole; 206, isolation bag tube; 207, fixed card slot; 208, plug tube; 209, groove; 210, external convex tube; 211, external strip seat; 212, internal clamp head; 213, strip cover plate; 214, grid plate; 215, flow tube; 216, stuffing tube; 217, grid sheet; 218, internal through tube; 219, sleeve; 220, connecting tube; 221, embedded tube; 222, annular groove; 300, dynamic self-adjusting mechanism; 301, special-shaped seat; 302, piston plate; 303, connecting rod; 304, piston pad; 305, sliding tube; 306, long guide tube; 307, conducting port; 308, short head; 309, side port; 310, side port; 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 cushion; 320, connecting box; 321, sealing tube; 322, air valve. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0022] Example: Figure 1-9 As shown, the present invention provides a technical solution, a highly flame-retardant power cable, comprising 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 cable 101, a shielding sleeve 103 is embedded and sleeved on the outside of the insulating sleeve 102, and an airtight reinforcement mechanism 200 is installed on the outside of the shielding sleeve 103; The airtight reinforcement mechanism 200 includes an airbag sheet 201, a hollow ring 202, a conductive tube 203, a limit block 204, an insertion hole 205, an isolation bag tube 206, a fixing slot 207, an insertion tube 208, a groove 209, an outer convex tube 210, an outer bar seat 211, an inner clamp head 212, a bar cover plate 213, a grid plate 214, a flow tube 215, a filling 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; The inside of the line body 100 is evenly filled with a number of airbag sheets 201 at an evenly spaced distance outside the cable 101. A number of hollow rings 202 are evenly sleeved on the outside of the shielding sleeve 103. A number of conductive tubes 203 are installed at equal angles on the side end faces of the hollow rings 202 along the circumferential direction. The conductive tubes 203 are sleeved on the outside of the shielding sleeve 103, and the shielding sleeve 103 is spiral. The shielding sleeve 103 and the airbag sheet 201 are both in line with the conductive tube 203. The airbag sheet 201 is filled with nitrogen to improve the cable exchange. Thermal stability and efficiency, a limit block 204 is installed on one side of the outer curved surface of the hollow ring 202, and a plug hole 205 is symmetrically arranged at the end of the limit block 204. An isolation bag tube 206 is sleeved at the outer position of the airbag sheet 201 inside the wire body 100, and a fixed card slot 207 is opened at the position of the limit block 204 on the inner curved surface of the isolation bag tube 206. The bottom of the fixed card slot 207 is symmetrically installed with an insertion tube 208. A plurality of outer strip seats 211 are embedded and installed at equal angles along the circumferential direction on the outer curved surface of the wire body 100; A plurality of inner clamping heads 212 are evenly and equidistantly installed on the inner curved surface of the outer strip seat 211, the fixed clamping groove 207 and the groove 209 are adjacently distributed along the axial direction of the line body 100, and the fixed clamping groove 207 and the groove 209 are respectively matched with the limit clamping block 204 and the inner clamping head 212, the inner cavity of the hollow ring 202 is connected with the inner cavity of the isolation bag tube 206 through the insertion hole 205 and the insertion tube 208, and the inner cavity of the isolation bag tube 206 is connected with the inner cavity of the outer strip seat 211 through the outer convex tube 210, so as to carry out air flow transportation, a groove 209 is opened at the position of the inner clamping head 212 on the outer curved surface of the isolation bag tube 206, and an outer convex tube 210 is installed at the bottom of the groove 209, a strip cover plate 213 is embedded and installed on the outer side of the outer strip seat 211, and a plurality of grid plates 214 are evenly and equidistantly installed inside the outer strip seat 211; A flow pipe 215 is embedded in the middle of the side end surface of the grid plate 214, a stuffing tube 216 is embedded in the middle of the side end surface of the airbag sheet 201, a number of grid sheets 217 are evenly and equidistantly installed inside the stuffing tube 216, an inner through-tube 218 is embedded in the middle of the side end surface of the grid sheet 217, the flow pipe 215 and the inner through-tube 218 are both mesh structures, and the inside of the outer bar seat 211 located outside the flow pipe 215 and the inside of the stuffing tube 216 located outside the inner through-tube 218 are filled with absorbent cotton to ensure insulation protection performance; A sealing head 104 is installed at the end of the line 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, and the conductive plug 106 is matched with the conductive socket 105. The conductive plug 106 and the conductive socket 105 are respectively fixedly connected to the sealing heads 104 at both ends of the line body 100 to improve the convenience of connection. A sleeve 219 is embedded in the middle of the side end face of the sealing head 104, and a sleeve 219 is installed with several equiangular outer curved surfaces along the circumferential direction. A dry connecting tube 220, an embedded tube 221 is installed on the side end face of the sealing head 104 at a position corresponding to the outer strip seat 211, an annular groove 222 is opened inside the sealing head 104 at a position corresponding to the embedded tube 221, the inner wall of the sleeve 219 fits with the outer wall of the stuffing tube 216, the length of the stuffing 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 embedded tube 221, and the annular groove 222 is connected to the sleeve 219 through the connecting tube 220 to ensure the stability of the airflow.

[0023] A dynamic self-adjusting mechanism 300 is installed at the end of the sealing head 104, and the dynamic self-adjusting mechanism 300 includes a special-shaped seat 301, a piston plate 302, a connecting rod 303, a piston pad 304, a sliding tube 305, a long guide cylinder 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 guide valve 314, an air inlet pipe 315, an air outlet pipe 316, a check valve 317, a sealing sleeve 318, an airbag cushion 319, a connecting box 320, a sealing tube 321 and an air valve 322; A plurality of special-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 special-shaped seat 301, a connecting rod 303 is installed in the middle of the side end surface 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 at the edge of the side end surface of the piston plate 302, a long guide cylinder 306 is installed at one end of the sliding tube 305, a short head 308 is installed at the other end of the sliding tube 305, and the short head 308 and the long guide cylinder 306 are respectively located on both sides of the piston plate 302, a conducting port 307 is opened on one side of the outer curved surface of the long guide cylinder 306, a side opening 309 is opened on the edge of the outer curved surface of one short head 308, and a side opening 310 is opened in the middle of the outer curved surface of the other short head 308; A flow hole 311 is provided inside the special-shaped seat 301 on one side of the connecting rod 303, a connecting hole 312 is provided inside the special-shaped seat 301 on the other side of the connecting rod 303, a sealing baffle 313 is installed inside the special-shaped seat 301 at the position corresponding to the short end cap 308, the cross section of the sliding tube 305 is elliptical, the spacing between the end of the flow hole 311 and the end of the connecting hole 312 along the axis direction 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, and the thickness of the sealing baffle 313 is equal to the spacing between the side opening 309 and the side opening 310 along the axis direction of the short end cap 308, so as to ensure the continuous stability of the boosting operation; A guide valve 314 is embedded and installed at the position of the piston pad 304 and the long guide cylinder 306 on the side end surface of the special-shaped seat 301, an air inlet pipe 315 is installed at the end of the guide valve 314, an air outlet pipe 316 is installed on one side of the outer curved surface of the special-shaped seat 301, and a check valve 317 is installed at the position of the end of the air outlet pipe 316 on the outer curved surface of the other sleeve 219. The guide valve 314 consists of an air inlet check valve and an air outlet check valve, and the guide valve 314 located only on one side of the connecting hole 312 is an air outlet check valve, the check valve 317 is a one-way flow valve, and the end of the air outlet pipe 316 is connected to the check valve 317 to limit the flow and guide to avoid backflow; A sealing sleeve 318 is sleeved on the outer side of the end of the sealing head 104, and an airbag cushion 319 is installed inside the sealing sleeve 318. The airbag cushion 319 is filled with clean gas. The sealing tube 321 fits with the sleeve 219. The sealing head 104, the conductive socket 105 and the conductive plug 106 all fit with the airbag cushion 319 to improve the sealing of the joints. A connecting box 320 is embedded in the middle of the side end face of the airbag cushion 319. Sealing tubes 321 are installed at both ends of the connecting box 320, and an air valve 322 is installed in the middle of the outer curved surface of the airbag cushion 319.

[0024] Working principle and use process of the present invention: When the present cable is actually used, firstly, a corresponding number of wire bodies 100 are selected for self-splicing according to the actual required length, or a finished product that has been spliced ​​is selected according to the required length. During the self-splicing process, the sealing sleeve 318 is clamped on the outside of the sealing head 104 on one wire body 100, and the sealing head 104 on the other wire body 100 is clamped into the sealing sleeve 318 from the other end of the sealing sleeve 318. Here, the two sealing heads 104 clamped into the same sealing sleeve 318 should be respectively installed with a conductive socket 105 and a conductive plug 106, and the conductive plug 106 should be aligned and inserted into the conductive socket 105; Then, clean air is injected into the airbag cushion 319 through the air valve 322 by using an external inflation device. The type of clean air can be selected according to actual needs. After the clean air enters the airbag cushion 319, the airbag cushion 319 will expand under pressure, and simultaneously squeeze the sealing head 104, the conductive socket 105 and the conductive plug 106, thereby ensuring the sealing performance and auxiliary locking of the conductive socket 105 and the conductive plug 106. Then the airflow will flow into the connection box 320, and enter the sleeve 219 through the sealing tube 321, enter the annular groove 222 through the connection tube 220, enter the outer bar seat 211 through the embedded tube 221, and enter the annular groove 222 in the sealing head 104 at the other end through the embedded tube 221 on the other side, and then enter the special-shaped seat 301 through the air inlet pipe 315, enter the corresponding sleeve 219 through the air outlet pipe 316, and finally flow back to the initial sleeve 219 through the internal through pipe 218. Here, this flow path is the main circulation path, and the initial airflow pressure of the clean air inside each line body 100 can be adjusted and limited through this path; During this process, under the conduction of the inner clamp head 212 and the outer convex tube 210, part of the clean air will flow into the isolation bag tube 206, and the isolation bag tube 206 will squeeze the outer line body 100 and the inner air bag sheet 201 under the action of air pressure, and cooperate with the air bag sheet 201 to limit the internal cable 101, so as to ensure the compactness and stability of the internal structure of the cable, and at the same time, it is equivalent to forming a double airtight insulation protection structure to ensure the insulation, bending resistance and pressure resistance of the cable. Then, the airflow will enter the hollow ring 202 under the guidance of the insertion tube 208 and the insertion hole 205, and fill each conductive tube 203. Here, this flow path is used as a branch circulation path, and the splicing work between the line bodies 100 is completed. Correspondingly, in the production process of the cable, the line body 100, the cable 101, the insulating sleeve 102, the shielding sleeve 103, the sealing head 104, the conductive socket 105 and the conductive plug 106 can be produced independently, and after the production is completed, they can be uniformly spliced ​​according to the above steps, and the finished products can be diversifiedly classified by filling different clean gases and splicing different lengths, thereby improving the diversity of products, meeting the different needs of users, improving the convenience of use and the uniformity of assembly, and can also be assembled into a set in the form of loose parts to further meet the user's demand for subjective initiative and improve the effective utilization rate of the cable; 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 electric energy is transmitted, the cable 101 will heat up accordingly. The airflow inside the conductive tube 203 absorbs the heat emitted by the cable 101 and will heat up and expand synchronously. Under the action of air pressure, it enters the hollow ring 202, and enters the isolation bag tube 206 through the insertion tube 208 and the insertion hole 205, causing the air pressure inside the isolation bag tube 206 to fluctuate synchronously. Then, it enters the outer bar seat 211 through the inner clamp head 212 and the outer convex tube 210, causing the air pressure inside the main circulation path to fluctuate synchronously. Then the airflow enters the annular groove 222 in the sealing head 104 on which the special-shaped seat 301 is installed, and enters the special-shaped seat 301 through the air inlet pipe 315 through the guide valve 314. In the initial state, the connecting hole 312 and the edge opening 309 are in an open state, and the flow hole 311 and the side opening 310 are in a blocked state. The airflow passes through the long guide cylinder 306 on one side of the flow hole 311 and enters the special-shaped seat 301 through the edge opening 309, forcing the piston plate 302 to drive the piston pad 304 to slide to the side of the piston pad 304 through the connecting rod 303, and presses the clean air on the 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 is pressed into the connected long guide cylinder 306 through the connecting hole 312, and discharged into the air inlet pipe 315 through the corresponding guide valve 314, further increasing the internal air pressure of the air inlet pipe 315. As the piston plate 302 moves, when the piston plate 302 abuts against the long guide cylinder 306, it will push the long guide cylinder 306 to move synchronously, forcing the short end cap 308 to move synchronously under the drive of the sliding tube 305, so that the connecting hole 312 and the edge opening 309 are in a blocked state, and the flow hole 311 and the side opening 310 are in an open state. At this time, the airflow flowing through the long guide cylinder 306 on one side of the flow hole 311 will enter the special-shaped seat 301 through the flow hole 311, causing the piston plate 302 to drive the piston pad 304 to slide toward the side of the piston plate 302 through the connecting rod 303, and the clean air is drawn into the special-shaped seat 301 to supplement the clean air on the side of the piston pad 304. The clean air on the side of the piston plate 302 will be pressed into the sliding tube 305 through the edge opening 309, and discharged into the intake pipe 315 through the corresponding guide valve 314, so as to carry out directional pressure increase compensation for the clean air. Until the piston plate 302 abuts against the short end cap 308, and pushes the short end cap 308 to move through the sliding tube 305 and drag the long guide tube 306 to return to the initial state, and the cycle is repeated. During the reciprocating cycle of the piston plate 302, the end surface difference between the piston plate 302 and the piston pad 304 is used to amplify the pressure difference generated by the heat dissipated by the cable 101, so as to promote the dynamic flow of clean gas in the main circulation path and the branch circulation path; When the clean airflow flows through the outer strip seat 211 and the stuffing tube 216, if it carries water vapor, it will be absorbed by the absorbent cotton outside the through-flow tube 215 and the inner through-flow tube 218. Under the conduction of the isolation bag tube 206, the outer strip seat 211 and the stuffing tube 216, the heat emitted by the cable 101 will also be transferred along with the airflow circulating inside and outside the cable, so that the temperature of each part of the cable is balanced, the heat dissipation effect inside the cable is promoted, and the cold resistance performance is improved. At the same time, the heat carried by the airflow will also cause the water absorbed by the absorbent cotton and the cable to evaporate and dissipate. With the double airtight insulation protection structure, the resistivity of the insulation structure of the cable is guaranteed; In the above process, the driving force of the dynamic self-adjusting mechanism 300 is mainly derived from the conversion of the heat emitted by the cable 101, that is, during the working process of the cable 101, the greater the heat it emits, 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 gas, the faster the heat exchange and the faster the removal of moisture during drying, and it can fully meet the requirements of working temperature and insulation resistance coefficient during the working process. Also in this process, with the connection box 320 and the sealing tube 321 turned on, the internal airflow of each main circulation path will also dynamically flow and connect between the entire spliced ​​cable body, further evenly distributing the heat and pressure, and ensuring the balance of each location. The airbag cushion 319 will also expand accordingly during this process to ensure the sealing of the splicing.

[0025] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A highly flame-retardant power cable, comprising a wire body (100), characterized in that: A plurality of cables (101) are installed at equal angles in a 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 airtight reinforcement mechanism (200) is installed on the outside of the shielding sleeve (103); The airtightness enhancement mechanism (200) comprises an airbag sheet (201); The interior of the wire body (100) is evenly and equidistantly filled with a plurality of airbag sheets (201) at positions outside the cable (101); the outer side of the shielding sleeve (103) is evenly and equidistantly sleeved with a plurality of hollow rings (202); the side end surfaces of the hollow rings (202) are evenly and equidistantly mounted with a plurality of conductive tubes (203); and a limiting block (204) is mounted on one side of the outer curved surface of the hollow rings (202); An isolation bag tube (206) is sleeved inside the wire body (100) at a position outside the air bag sheet (201); a fixed card slot (207) is provided on the inner curved surface of the isolation bag tube (206) at a position corresponding to the limit card block (204); an insertion tube (208) is symmetrically mounted on the bottom of the fixed card slot (207); and a plurality of outer strip seats (211) are embedded and mounted at equal angles along the circumferential direction on the outer curved surface of the wire body (100); The inner curved surface of the outer strip seat (211) is evenly and equidistantly provided with a plurality of inner clamps (212); the outer curved surface of the isolation bag tube (206) is provided with a groove (209) at a position corresponding to the inner clamp (212); the bottom of the groove (209) is provided with an outer convex tube (210); a strip cover plate (213) is embedded and installed on the outer side of the outer strip seat (211); a plurality of grid plates (214) are evenly and equidistantly installed inside the outer strip seat (211); a flow tube (215) is embedded and installed in the middle of the side end surface of the grid plate (214); and a stuffing tube (216) is embedded and installed in the middle of the side end surface of the airbag sheet (201).

2. A highly flame-retardant power cable according to claim 1, characterized in that: 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), and the conductive plug (106) fits with the conductive socket (105), and 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. A highly 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), and the airbag sheet (201) is filled with nitrogen.

4. A highly flame-retardant power cable according to claim 1, characterized in that: The fixed slot (207) and the groove (209) are adjacently distributed along the axial direction of the wire body (100), and the fixed slot (207) and the groove (209) are respectively matched with the limit block (204) and the inner clamping head (212); the inner cavity of the hollow ring (202) is connected with the inner cavity of the isolation bag tube (206) through the insertion hole (205) and the insertion tube (208); and the inner cavity of the isolation bag tube (206) is connected with the inner cavity of the outer bar seat (211) through the outer convex tube (210).

5. A highly flame-retardant power cable according to claim 1, characterized in that: The end of the limit block (204) is symmetrically provided with insertion holes (205); A plurality of grid sheets (217) are evenly and equidistantly installed inside the filling tube (216), and an inner through pipe (218) is embedded and installed in the middle of the side end surface of the grid sheet (217); A sealing head (104) is installed at the end of the wire body (100), a sleeve (219) is embedded and installed in the middle of the side end surface 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 the sleeve (219), an embedded tube (221) is installed at a position of the side end surface of the sealing head (104) corresponding to the outer strip seat (211), and an annular groove (222) is opened inside the sealing head (104) at a position corresponding to the embedded tube (221).

6. A highly flame-retardant power cable according to claim 5, characterized in that: The flow pipe (215) and the inner flow pipe (218) are both mesh structures, and the interior of the outer bar seat (211) located at the outer side of the flow pipe (215) and the interior of the filling pipe (216) located at the outer side of the inner flow pipe (218) are both filled with absorbent cotton; The inner wall of the sleeve (219) fits with the outer wall of the stuffing tube (216); the length of the stuffing tube (216) is greater than the length of the cable (101); the inner cavity of the outer bar seat (211) is connected to the annular groove (222) via an embedded tube (221); and the annular groove (222) is connected to the sleeve (219) via a connecting tube (220).

7. A highly flame-retardant power cable according to claim 5, characterized in that: A dynamic self-adjusting mechanism (300) is installed at the end of the sealing head (104), and the dynamic self-adjusting mechanism (300) comprises a special-shaped seat (301); A plurality of special-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 special-shaped seat (301); a connecting rod (303) is installed in the middle of the side end surface 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 at the edge of the side end surface of the piston plate (302); the sliding tube (305) is A long guide tube (306) is installed at one end of the sliding tube (305), a short seal (308) is installed at the other end of the sliding tube (305), and the short seal (308) and the long guide tube (306) are respectively 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), an edge opening (309) is opened on the edge of the outer curved surface of one of the short seals (308), and a side opening (310) is opened in the middle of the outer curved surface of the other short seal (308); A flow hole (311) is provided inside the special-shaped seat (301) on one side of the connecting rod (303), a connection hole (312) is provided inside the special-shaped seat (301) on the other side of the connecting rod (303), a sealing baffle (313) is installed inside the special-shaped seat (301) at a position corresponding to the short end cap (308), a guide valve (314) is embedded and installed at positions corresponding to the piston pad (304) and the long guide tube (306) on the side end surface of the special-shaped seat (301), an air inlet pipe (315) is installed at the end of the guide valve (314), an air outlet pipe (316) is installed on one side of the outer curved surface of the special-shaped seat (301), and a check valve (317) is installed at a position corresponding to the end of the air outlet pipe (316) on the outer curved surface of the other sleeve (219); A sealing sleeve (318) is sleeved on the outer side of the end of the sealing head (104), an airbag cushion (319) is installed inside the sealing sleeve (318), a connection box (320) is embedded and installed in the middle of the side end surface of the airbag cushion (319), sealing tubes (321) are installed at both ends of the connection box (320), and an air valve (322) is installed in the middle of the outer curved surface of the airbag cushion (319).

8. A highly flame-retardant power cable according to claim 7, characterized in that: The sliding tube (305) has an elliptical cross section, the spacing 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), and the thickness of the sealing baffle (313) is equal to the spacing between the edge opening (309) and the side opening (310) along the axis of the short head (308).

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

10. A highly 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 with the sleeve (219), and the sealing head (104), the conductive socket (105), and the conductive plug (106) all fit with the airbag cushion (319).

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