A low-smoke, halogen-free, cross-linked polyethylene insulated power cable

Abstract

The invention discloses a low-smoke halogen-free cross-linked polyethylene insulated power cable, which relates to the technical field of power cables and comprises a central conductor, wherein the outer side of the central conductor is tightly coated with a rubber insulating sleeve, and the outer sides of a plurality of the rubber insulating sleeves are jointly coated with a limiting silicone sleeve, and the outer side of the limiting silicone sleeve is equidistantly and evenly coated with an axial support inner ring, and the outer ring of the axial support inner ring is tightly coated with an axial protection outer ring, and the axial protection outer ring and the outer side of the filling soft rubber sleeve are jointly coated with an isolation protection rubber sleeve, and the outer ring of the isolation protection rubber sleeve is tightly coated with an installation outer rubber sleeve, and an installation bottom groove is penetrated through the middle of the bottom end of the outer side of the installation outer rubber sleeve. The invention effectively prevents rain and snow from adhering to the outer side of the cable to cause an increase in the overall weight of the cable, reduces the lateral traction at the cable end connection during operation, slows down the fatigue aging rate of the cable connection, and prolongs the actual service life of the cable.

Description

Technical Field

[0001] The invention relates to the technical field of power cables, in particular to a low-smoke halogen-free cross-linked polyethylene insulated power cable. Background Art

[0002] Power cables are cables used to transmit and distribute electrical energy. Power cables are commonly used in urban underground power grids, power station lead-out lines, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electrical energy in the trunk lines of power systems, including 1-500kV and above various voltage levels, various insulated power cables. For this reason, a Chinese patent discloses a halogen-free, low-smoke, flame-retardant copper core cross-linked polyethylene insulated power cable, application number: 202020109848.9. The patent has the advantage of good fire resistance, which solves the problem that the existing power cables are not well-fired. In the event of a fire, power cables are easy to burn and cause the spread of fire, causing economic losses. After catching fire, power cables are prone to leakage and short circuit of the wire core. The cable sheath is prone to produce a large amount of harmful gas when burning, which is easy to endanger the safety of personnel when people flee from the fire scene.

[0003] However, current power cables lack corresponding auxiliary adjustment structures during use, which makes it impossible to fine-tune the cable structure as needed when used in rainy and snowy environments. This causes snow to accumulate on the top of the cable and a large amount of rainwater to adhere to the outer skin, which increases the overall burden on the cable, causes traction deformation at the cable connection point, and reduces the service life of the cable. Summary of the invention

[0004] The present invention provides a low-smoke halogen-free cross-linked polyethylene insulated power cable, which can effectively solve the problem mentioned in the above background technology that the current power cables lack corresponding auxiliary adjustment structures during use, resulting in the inability to fine-tune the structure of the cables according to needs when used in rainy and snowy environments, causing snow accumulation on the top of the cables and a large amount of rainwater adhering to the outer skin, thereby increasing the overall burden of the cable, causing traction deformation at the cable connection point, and reducing the service life of the cable.

[0005] To achieve the above object, the present invention provides the following technical solution: a low-smoke halogen-free cross-linked polyethylene insulated power cable, comprising a central conductor, the outer side of the central conductor is tightly coated with a rubber insulating sleeve, and the outer sides of multiple rubber insulating sleeves are jointly coated with a limited silicone sleeve;

[0006] An external dynamic telescopic cleaning mechanism is arranged outside the limiting silicone sleeve, and the external dynamic telescopic cleaning mechanism is used to adjust the structure outside the cable so that the cable can maintain different structural forms in different temperature environments to achieve auxiliary cleaning of the outside of the cable;

[0007] The external dynamic telescopic cleaning mechanism includes an axially supporting inner ring;

[0008] The outer side of the limiting silicone sleeve is evenly and equidistantly covered with an axial support inner ring, and the outer ring of the axial support inner ring is tightly covered with an axial protection outer ring;

[0009] The axial protection outer ring and the outside of the filling soft rubber sleeve are jointly covered with an isolation protection rubber sleeve, the outer ring of the isolation protection rubber sleeve is tightly covered with an installation outer rubber sleeve, a mounting bottom groove is penetrated through the middle of the bottom end of the outer side of the installation outer rubber sleeve, and limited annular grooves are evenly and equidistantly provided on the outer side of the installation outer rubber sleeve;

[0010] An installation inner long box is evenly and equidistantly connected inside the installation bottom groove, a connecting flat box is fixedly installed on the inner top of the installation inner long box, and liquid guiding circular grooves are evenly and equidistantly opened on both sides of the connecting flat box, and a telescopic bottom sleeve is fixedly connected to the middle of the bottom surface of the connecting flat box;

[0011] An arc box is fixedly connected between the inner walls of the outer rubber sleeve in the middle of both sides of the inner long box, a center limiting airbag is fixedly connected to the middle of the inner cavity of the arc box, a telescopic counterweight rubber strip is fixedly connected to the top of the center limiting airbag corresponding to the top position inside the arc box, connecting elastic bags are connected to the two ends of the bottom surface of the telescopic counterweight rubber strip, and binding hoop rings are symmetrically clamped inside the limiting annular groove.

[0012] Preferably, positioning inner holes are evenly and equidistantly penetrated at the end face of the axial support inner ring and the edge of the end face of the axial protection outer ring; a circumferential inner rubber sleeve is evenly and equidistantly sleeved on the outside of the limiting silicone sleeve corresponding to the end position of the axial support inner ring; a supporting rubber film is evenly and equidistantly fixedly connected to the outside of the circumferential inner rubber sleeve along the circumferential direction; a filling soft rubber sleeve is tightly sleeved on the outside of the circumferential inner rubber sleeve corresponding to the side position of the supporting film; and telescopic circular groove holes are evenly and equidistantly penetrated at the edge of the end face of the filling soft rubber sleeve.

[0013] Preferably, the outer rubber ring of the axial support inner ring and the inner rubber ring of the axial protection outer ring are staggered and fitted with each other, and both the axial support inner ring and the axial protection outer ring can be elastically telescopically deformed.

[0014] Preferably, the filling soft rubber sleeve is softer than the inner rubber sleeve and the supporting film, and the outer side of the filling soft rubber sleeve is tightly fitted to the side surface of the supporting film.

[0015] Preferably, the outer side of the top of the installation inner long box is tightly slidably fitted with the inner wall of the installation bottom groove, the ends of two adjacent installation inner long boxes are tightly fitted, and the top of the outer side of the connecting flat box is fixedly connected with the inner wall of the installation inner long box.

[0016] Preferably, the inner cavity of the installation inner long box and the inner cavity of the connecting flat box are connected to each other through a liquid-conducting circular notch, and the outer top of the telescopic bottom sleeve is tightly and fixedly connected to the inner wall of the bottom of the installation inner long box.

[0017] Preferably, the bottom end of the mounting arc box is connected to the inner cavity of the mounting inner long box through a connecting flat tube, the outer side of the telescopic counterweight rubber strip is tightly slidably fitted with the inner wall of the mounting arc box, the outer arc surface of the bundling hoop is flush with the outer side of the mounting outer rubber sleeve, the end of the mounting inner long box is tightly fitted with the inner wall of the bundling hoop, and the connecting elastic bag is filled with hydraulic oil.

[0018] Preferably, an internal differential telescopic support mechanism is provided inside the limiting silicone sleeve, and the internal differential telescopic support mechanism is used to fill and support the inside of the cable and provide heat dissipation for the inside of the cable during use of the cable;

[0019] The internal differential telescopic support mechanism includes a connecting central rubber strip;

[0020] A connecting center rubber strip is evenly and equidistantly arranged at the middle position between the multiple rubber insulating sleeves corresponding to the inner side of the limiting silicone sleeve, and the end of the connecting center rubber strip is fixedly connected to the installation center capsule, and the three sides of the installation center capsule are fixedly connected to the gaps on the sides of the rubber insulating sleeve, and the outer circle of the inner cavity of the limiting arc-shaped capsule is filled with an arc-shaped filling liquid capsule;

[0021] One end of the interior of the installation center capsule is filled with a buffer front liquid capsule, the middle of one end of the buffer front liquid capsule is fixedly connected with a central connecting tube, one end of the central connecting tube is fixedly connected with an expansion short liquid capsule at a position corresponding to the interior of the installation center capsule, the middle of the inner cavity of the buffer front liquid capsule is filled with an internal support cotton strip, and the middle of the inner cavity of the expansion short liquid capsule is filled with a heat-absorbing inner block;

[0022] The inside of the installation center bag is covered with a compressed air bag at a position corresponding to the outside of the center connecting tube, and the side of the compressed air bag is connected to an extruded long air bag via a pipeline corresponding to the inner cavity of the arc-shaped filling liquid bag.

[0023] Preferably, the outer sides of the front buffer liquid bladder and the short expansion liquid bladder are tightly slidably fitted with the inner wall of the installation center bladder, and the interiors of the front buffer liquid bladder and the short expansion liquid bladder are filled with heat transfer oil.

[0024] Preferably, the specific heat capacity of the heat-absorbing inner block is smaller than the specific heat capacity of the internal supporting cotton strip and the heat-conducting oil, the outer side of the extruded long air bag is tightly fitted with the inner wall of the arc-shaped filling liquid bag, and the outer arc surface of the installation center bag and the outer arc surface of the limiting arc bag are tightly fitted with the outer side of the rubber insulating sleeve.

[0025] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0026] 1. An external dynamic telescopic cleaning mechanism is provided. The cleaning process of the cable exterior is optimized through the mutual cooperation between the components inside the external dynamic telescopic cleaning mechanism. By installing the inner length box and the internal components of the arc box and cooperating with the external environment of the cable, the temperature of the cable working environment drops in rainy and snowy weather, so that the telescopic bottom sleeve can expand and stretch in rainy and snowy weather to increase the lateral windward area of ​​the cable, and the cable is twisted and shaken under the drive of the lateral wind. Then, in the process of cable movement and deformation, inertia is used to make the rain and snow attached to the outside of the cable fall off, so as to realize the rapid cleaning of the cable exterior, effectively prevent the rain and snow from adhering to the outside of the cable and causing the overall weight of the cable to increase, reduce the lateral traction of the cable end connection during operation, slow down the fatigue aging rate of the cable connection, and extend the actual service life of the cable;

[0027] At the same time, the combined structural design of the axial support inner ring and the axial protection outer ring and the circumferential inner rubber sleeve and the filling soft rubber sleeve effectively enhances the flexibility of the inner and outer layers of the cable, reduces the influence of the movement of the external structure of the cable on the internal structure of the cable, and utilizes the elastic deformation characteristics between the axial support inner ring and the axial protection outer ring and the circumferential inner rubber sleeve and the filling soft rubber sleeve to ensure that the outer side of the cable can be quickly reset after axial movement and torsional displacement, effectively preventing the internal wear gap of the cable from reducing the performance of the cable itself after long-term working swing, and further improving the environmental adaptability of the cable;

[0028] In addition, by utilizing the cooperation between the installation bottom groove and the limiting annular groove, the inner length box and the bundling hoop can be installed on the outside of the cable in a snap-on manner, making the maintenance and disassembly process of the inner length box and the bundling hoop more convenient, thereby effectively improving the convenience of cable use. At the same time, by utilizing the characteristic that the expansion and contraction deformation amount is different due to the different temperatures on the outside of the telescopic bottom sleeve, the swing amplitude of each section of the cable is also different under the influence of side wind, so as to further improve the freedom of the cable swinging process, prevent the phenomenon that some areas on the outside of the cable cannot be fully cleaned due to the small swing amplitude, and further improve the environmental adaptability of the power cable.

[0029] 2. An internal differential telescopic support mechanism is provided. Through the mutual cooperation between the components inside the internal differential telescopic support mechanism, the support heat dissipation process during the use of the cable is optimized. Through the different specific heat capacities of the internal support cotton strips and the heat-absorbing inner blocks inside the buffer front liquid capsule and the expansion short liquid capsule, the cable is rapidly heated up. The rapid expansion of the expansion short liquid capsule drives the flow of gas inside the compressed air capsule and the flow of heat transfer oil between the buffer front liquid capsule and the expansion short liquid capsule, thereby consuming the heat inside the cable during the gas-liquid flow. At the same time, the flattening deformation of the arc-shaped filling liquid capsule increases the heat dissipation area outside the cable, thereby effectively improving the heat dissipation method and heat dissipation efficiency of the cable. When the internal temperature of the power cable continues to maintain a high temperature, the different characteristics of the air pressure compression rate are used to make the buffer front liquid capsule, the expansion short liquid capsule and the arc-shaped filling liquid capsule fully fill the internal cavity of the limiting silicone sleeve after absorbing heat and expanding, thereby quickly conducting the heat inside the cable out through the heat transfer oil, further improving the heat dissipation efficiency of the cable.

[0030] At the same time, the flexible deformation characteristics of the components inside the connecting center rubber strip, the installing center bag and the limiting arc bag are utilized to flexibly limit the center conductor inside the limiting silicone sleeve, and when the cable is subjected to external pressure, the compression deformation of the compressed air bag and the extruded long air bag can be used to provide buffering for the cable, thereby effectively improving the overall buffering performance of the cable and optimizing the use process of the cable.

[0031] To summarize, the cleaning and protection process of the cable is optimized through the mutual cooperation between the external dynamic telescopic cleaning mechanism and the internal differential telescopic support mechanism. The mutual cooperation between the components connected on the axial support inner ring and the circumferential inner rubber sleeve makes the external structure of the cable more flexible, and improves the deformation resistance of the outer ring of the cable. The mutual cooperation between the connecting center rubber strip and the components connected inside the installation center capsule allows the cable to be elastically deformed when squeezed, providing internal buffering for the cable, effectively improving the overall safety of the cable. In the process of swinging and torsional deformation of the cable, it provides cleaning for the outside of the cable and assists in the heat dissipation inside the cable, effectively expanding the function of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] In the attached picture:

[0034] Figure 1 It is a schematic diagram of the structure of the present invention;

[0035] Figure 2 It is a structural schematic diagram of the end face of the present invention;

[0036] Figure 3 It is a structural schematic diagram of the external dynamic telescopic cleaning mechanism of the present invention;

[0037] Figure 4 It is a schematic diagram of the structure of the axial support inner ring installation of the present invention;

[0038] Figure 5 It is a schematic diagram of the structure of the connection elastic bag installation of the present invention;

[0039] Figure 6 It is a structural schematic diagram of the installation of the center limit airbag of the present invention;

[0040] Figure 7 It is a structural schematic diagram of the installation of the filling soft rubber sleeve of the present invention;

[0041] Figure 8 It is a structural schematic diagram of the internal differential telescopic support mechanism of the present invention;

[0042] Fig. 9 It is a structural schematic diagram of the installation of the connecting center rubber strip of the present invention;

[0043] Fig.10 It is a schematic diagram of the structure of the heat absorbing inner block installation of the present invention;

[0044] Fig.11 It is a structural schematic diagram of the installation of the compressed air bag of the present invention;

[0045] Numbers in the figure: 1, center conductor; 2, rubber insulation sleeve; 3, limit silicone sleeve;

[0046] 4. External dynamic telescopic cleaning mechanism; 401. Axial support inner ring; 402. Axial protection outer ring; 403. Positioning inner hole; 404. Circumferential inner rubber sleeve; 405. Support rubber sheet; 406. Filling soft rubber sleeve; 407. Telescopic circular groove hole; 408. Isolation protection rubber sleeve; 409. Install outer rubber sleeve; 410. Install bottom groove; 411. Limiting annular groove; 412. Install inner long box; 413. Connect flat box; 414. Liquid guide circular groove; 415. Telescopic bottom sleeve; 416. Install arc box; 417. Center limit airbag; 418. Telescopic counterweight rubber strip; 419. Connect elastic bag; 420. Bundling hoop;

[0047] 5. Internal differential telescopic support mechanism; 501. Connecting center rubber strip; 502. Installing center capsule; 503. Limiting arc capsule; 504. Arc-shaped filling liquid capsule; 505. Buffering front liquid capsule; 506. Center connecting tube; 507. Inflatable short liquid capsule; 508. Internal supporting cotton strip; 509. Heat absorbing inner block; 510. Compression airbag; 511. Extrusion long strip airbag. DETAILED DESCRIPTION

[0048] 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.

[0049] Example: Figure 1-11 As shown, the present invention provides a technical solution, a low-smoke halogen-free cross-linked polyethylene insulated power cable, comprising a central conductor 1, the outer side of the central conductor 1 is tightly coated with a rubber insulating sleeve 2, and the outer sides of multiple rubber insulating sleeves 2 are jointly coated with a limited position silicone sleeve 3;

[0050] An external dynamic telescopic cleaning mechanism 4 is arranged outside the limiting silicone sleeve 3, and the external dynamic telescopic cleaning mechanism 4 is used to adjust the structure of the cable exterior so that the cable can maintain different structural forms in different temperature environments to achieve auxiliary cleaning of the cable exterior;

[0051] The external dynamic telescopic cleaning mechanism 4 includes an axial support inner ring 401, an axial protection outer ring 402, a positioning inner hole 403, a circumferential inner rubber sleeve 404, a support rubber sheet 405, a filling soft rubber sleeve 406, a telescopic circular groove hole 407, an isolation protection rubber sleeve 408, an installation outer rubber sleeve 409, an installation bottom groove 410, a limiting annular groove 411, an installation inner long box 412, a connecting flat box 413, a liquid guiding circular groove 414, a telescopic bottom sleeve 415, an installation arc box 416, a center limiting airbag 417, a telescopic counterweight rubber strip 418, a connecting elastic capsule 419 and a binding hoop 420;

[0052] The outer side of the limiting silicone sleeve 3 is evenly and equidistantly coated with an axial support inner ring 401, and the outer ring of the axial support inner ring 401 is tightly coated with an axial protection outer ring 402. The outer rubber ring of the axial support inner ring 401 and the inner rubber ring of the axial protection outer ring 402 are staggered and matched with each other, and both the axial support inner ring 401 and the axial protection outer ring 402 can be elastically deformed;

[0053] Positioning inner holes 403 are evenly and evenly provided at the end faces of the axial support inner ring 401 and the edge of the end faces of the axial protection outer ring 402, a circumferential inner rubber sleeve 404 is evenly and evenly sleeved at the outer side of the limiting silicone sleeve 3 corresponding to the end position of the axial support inner ring 401, a supporting rubber sheet 405 is evenly and evenly fixedly connected to the outer side of the circumferential inner rubber sleeve 404 along the circumferential direction, a filling soft rubber sleeve 406 is tightly sleeved at the outer side of the circumferential inner rubber sleeve 404 corresponding to the side of the supporting rubber sheet 405, and a telescopic circular groove hole 407 is evenly and evenly provided at the edge of the end face of the filling soft rubber sleeve 406, the texture of the filling soft rubber sleeve 406 is softer than the circumferential inner rubber sleeve 404 and the supporting rubber sheet 405, and the outer side of the filling soft rubber sleeve 406 is tightly fitted with the side of the supporting rubber sheet 405;

[0054] The axial protection outer ring 402 and the filling soft rubber sleeve 406 are covered with an isolation protection rubber sleeve 408, and the outer ring of the isolation protection rubber sleeve 408 is tightly covered with an installation outer rubber sleeve 409. A mounting bottom groove 410 is provided through the middle of the bottom end of the outer side of the installation outer rubber sleeve 409, and limited annular grooves 411 are evenly and equidistantly provided on the outer side of the installation outer rubber sleeve 409;

[0055] The inside of the installation bottom groove 410 is evenly and evenly connected with the installation inner long box 412, and the inner top of the installation inner long box 412 is fixedly installed with a connecting flat box 413. The outer side of the top of the installation inner long box 412 is tightly slidably fitted with the inner wall of the installation bottom groove 410, and the ends of two adjacent installation inner long boxes 412 are tightly fitted, and the outer top of the connecting flat box 413 is fixedly connected with the inner wall of the installation inner long box 412;

[0056] Liquid-guiding circular notches 414 are evenly and equidistantly provided on both sides of the connecting flat box 413, a telescopic bottom sleeve 415 is fixedly connected to the middle of the bottom surface of the connecting flat box 413, the inner cavity of the installation inner long box 412 and the inner cavity of the connecting flat box 413 are connected to each other through the liquid-guiding circular notches 414, and the outer top of the telescopic bottom sleeve 415 is tightly and fixedly connected to the inner wall of the bottom of the installation inner long box 412;

[0057] An arc box 416 is fixedly connected between the middle parts of both sides of the inner long box 412 corresponding to the inner walls of the outer rubber sleeve 409, a center limiting air bag 417 is fixedly connected to the middle of the inner cavity of the arc box 416, a telescopic counterweight rubber strip 418 is fixedly connected at the top position of the inner top of the arc box 416 corresponding to the top of the center limiting air bag 417, and a connecting elastic bag 419 is fixedly connected at the two ends of the bottom surface of the telescopic counterweight rubber strip 418 corresponding to the side positions of the center limiting air bag 417, and a bundling hoop 420 is symmetrically clamped inside the limiting annular groove 411, and the bottom end of the arc box 416 is connected to the inner cavity of the inner long box 412 through a connecting flat tube, the outer side of the telescopic counterweight rubber strip 418 is tightly slidably fitted with the inner wall of the arc box 416, the outer arc surface of the bundling hoop 420 is flush with the outer side of the outer rubber sleeve 409, and the space between the end of the inner long box 412 and the inner wall of the bundling hoop 420 is Tightly fitting, the elastic capsule 419 is filled with hydraulic oil. Through the mutual cooperation between the internal components of the external dynamic telescopic cleaning mechanism 4, the cleaning process of the cable exterior is optimized. By installing the inner length box 412 and the internal components of the arc box 416 and the external environment of the cable, the telescopic bottom sleeve 415 can be expanded and extended in rainy and snowy weather to increase the lateral windward area of ​​the cable, and the cable can be twisted and shaken under the drive of the lateral wind, and then the inertia is used to make the rain and snow attached to the outside of the cable fall off during the cable movement and deformation process, so as to realize the rapid cleaning of the outside of the cable, effectively preventing the attachment of rain and snow to the outside of the cable and causing the overall weight of the cable to increase, reducing the lateral traction of the cable end connection during operation, slowing down the fatigue aging rate of the cable connection, and extending the actual service life of the cable;

[0058] At the same time, the combined structure design of the axial support inner ring 401 and the axial protection outer ring 402, the circumferential inner rubber sleeve 404 and the filling soft rubber sleeve 406 is used to effectively enhance the flexibility of the inner and outer layers of the cable, reduce the influence of the movement of the external structure of the cable on the internal structure of the cable, and utilize the elastic deformation characteristics between the axial support inner ring 401 and the axial protection outer ring 402 and the circumferential inner rubber sleeve 404 and the filling soft rubber sleeve 406 to ensure that the outer side of the cable can be quickly reset after axial movement and torsional deviation, effectively prevent the internal wear gap of the cable after long-term working swing and reduce the performance of the cable itself, and further improve the environmental adaptability of the cable;

[0059] And by utilizing the cooperation between the installation bottom groove 410 and the limiting annular groove 411, the inner length box 412 and the bundling hoop 420 are installed on the outside of the cable in a snap-on manner, making the maintenance and disassembly process of the inner length box 412 and the bundling hoop 420 more convenient, thereby effectively improving the convenience of cable use. At the same time, by utilizing the characteristic that the expansion and contraction deformation amount of the expansion bottom sleeve 415 is different due to the different temperatures on the outside, the swing amplitudes of each section of the cable are also different under the influence of the side wind, so as to further improve the freedom of the cable swing process, prevent the phenomenon that some areas on the outside of the cable cannot be fully cleaned due to the small swing amplitude, and further improve the environmental adaptability of the power cable;

[0060] An internal differential telescopic support mechanism 5 is provided inside the limiting silicone sleeve 3. The internal differential telescopic support mechanism 5 is used to fill and support the inside of the cable and provide heat dissipation for the inside of the cable during use;

[0061] The internal differential telescopic support mechanism 5 includes a connecting central rubber strip 501, a mounting central capsule 502, a limiting arc capsule 503, an arc-shaped filling liquid capsule 504, a buffer front liquid capsule 505, a central connecting tube 506, an inflatable short liquid capsule 507, an internal supporting cotton strip 508, a heat absorbing inner block 509, a compression airbag 510 and an extruded long airbag 511;

[0062] A connecting center rubber strip 501 is evenly and equidistantly arranged at the middle position between the multiple rubber insulating sleeves 2 corresponding to the inner side of the limiting silicone sleeve 3, and a mounting center capsule 502 is fixedly connected to the end of the connecting center rubber strip 501. The three sides of the mounting center capsule 502 are fixedly connected to the gaps on the sides of the rubber insulating sleeve 2, and the outer circle of the inner cavity of the limiting arc capsule 503 is filled with an arc-shaped filling liquid capsule 504;

[0063] One end of the interior of the installation center capsule 502 is filled with a buffer front liquid capsule 505, a central connecting tube 506 is fixedly connected to the middle of one end of the buffer front liquid capsule 505, an expansion short liquid capsule 507 is fixedly connected to one end of the central connecting tube 506 at a position corresponding to the interior of the installation center capsule 502, the middle of the inner cavity of the buffer front liquid capsule 505 is filled with an internal support cotton strip 508, the middle of the inner cavity of the expansion short liquid capsule 507 is filled with a heat-absorbing inner block 509, the outer sides of the buffer front liquid capsule 505 and the expansion short liquid capsule 507 are tightly slidably fitted with the inner wall of the installation center capsule 502, and the interiors of the buffer front liquid capsule 505 and the expansion short liquid capsule 507 are filled with heat transfer oil;

[0064] The inside of the installed central capsule 502 is coated with a compressed air bag 510 at the outer position of the central connecting tube 506, and the side of the compressed air bag 510 is connected to the inner cavity of the arc-shaped filling liquid capsule 504 through a pipeline. The specific heat capacity of the heat-absorbing inner block 509 is smaller than the specific heat capacity of the internal supporting cotton strip 508 and the heat-conducting oil. The outer side of the extruded long air bag 511 fits tightly with the inner wall of the arc-shaped filling liquid capsule 504, and the outer arc surface of the installed central capsule 502 and the outer arc surface of the limiting arc capsule 503 are both tightly fitted with the outer side of the rubber insulating sleeve 2. The mutual cooperation between the internal components of the internal differential telescopic support mechanism 5 optimizes the support and heat dissipation process during the use of the cable, and the different specific heat capacities of the internal supporting cotton strip 508 and the heat-absorbing inner block 509 in the front buffer liquid capsule 505 and the expansion short liquid capsule 507 are used. The cable has a heat dissipation property, so that when the cable is heated up quickly, the rapid expansion of the expansion short liquid capsule 507 drives the flow of gas inside the compressed air capsule 510 and the flow of heat transfer oil between the buffer front liquid capsule 505 and the expansion short liquid capsule 507, thereby consuming the heat inside the cable during the gas-liquid flow process, and at the same time, the flattening deformation of the arc-shaped filling liquid capsule 504 increases the heat dissipation area outside the cable, thereby effectively improving the heat dissipation method and heat dissipation efficiency of the cable. When the internal temperature of the power cable continues to maintain a high temperature, the different characteristics of air pressure compression rates are used to make the buffer front liquid capsule 505, the expansion short liquid capsule 507 and the arc-shaped filling liquid capsule 504 fully fill the internal cavity of the limiting silicone sleeve 3 after absorbing heat and expanding, and then quickly conduct the heat inside the cable out through the heat transfer oil, further improving the heat dissipation efficiency of the cable;

[0065] At the same time, by utilizing the flexible deformation characteristics of the components inside the connecting center rubber strip 501, the installing center bag 502 and the limiting arc bag 503, the center conductor 1 inside the limiting silicone sleeve 3 is flexibly limited, and when the cable is subjected to external pressure, the compression deformation of the compression airbag 510 and the extruded long airbag 511 can be utilized to provide buffering for the cable, thereby effectively improving the overall buffering performance of the cable and optimizing the use process of the cable.

[0066] Working principle and use process of the present invention: In the process of using the power cable, the present invention needs to first install the central conductor 1 to a suitable position, and then protect the outer side of the central conductor 1 by the rubber insulating sleeve 2, and limit the outer side of the rubber insulating sleeve 2 by the limiting silicone sleeve 3 to prevent the central conductor 1 from shaking randomly during use;

[0067] When the power cable is shaken by external wind during use, the staggered axial design between the axial support inner ring 401 and the axial protection outer ring 402 can provide a buffer between the inner and outer components of the cable through the elastic deformation of the axial support inner ring 401 and the axial protection outer ring 402 when the internal components of the cable move, so as to prevent the wear caused by the alternating displacement of the inside and outside of the cable, and adjust the overall structure of the axial support inner ring 401 and the axial protection outer ring 402 through the positioning inner hole 403, so that the axial support inner ring 401 and the axial protection outer ring 402 can be elastically deformed in a larger range;

[0068] When the cable twists during the swinging process, the inner and outer parts of the cable are isolated and protected by the inner circumferential rubber sleeve 404 and the filling soft rubber sleeve 406, and the filling soft rubber sleeve 406 is limited by the insertion of the supporting rubber sheet 405, so that when the cable twists inside and outside, the filling soft rubber sleeve 406 can be elastically deformed by the telescopic circular slot hole 407 in cooperation with the filling soft rubber sleeve 406. When the external force on the cable is removed, the filling soft rubber sleeve 406 will be reset through elastic deformation, and then the axial deformation and circumferential torsion of the cable generated by the cable can be buffered by the flexible splicing structure inside the cable;

[0069] The outer side of the cable can be protected by the isolation protective rubber sleeve 408 to prevent the internal structure of the cable from being damaged during use, and then the inner long box 412 and the components connected thereto are installed to the bottom of the cable by installing the outer rubber sleeve 409 in cooperation with the installation bottom groove 410, and the binding hoop 420 is bound to the outer side of the installation outer rubber sleeve 409 through the limiting annular groove 411, and then the inner long box 412 is mechanically bound and limited by the binding hoop 420 to improve the stability of the installation of the external structures of the installation outer rubber sleeve 409;

[0070] When it rains or snows, the temperature of the cable's external environment drops, causing the temperature inside the center limiting airbag 417 in the middle of the arc box 416 to drop. As the temperature inside the center limiting airbag 417 drops, the overall pressure inside the center limiting airbag 417 is reduced, causing the center limiting airbag 417 to gradually shrink inward. During the shrinkage of the center limiting airbag 417, the telescopic counterweight rubber strip 418 is simultaneously driven to slide downward along the inner wall of the arc box 416. Then, during the sliding of the telescopic counterweight rubber strip 418, the connecting elastic bag 419 is squeezed, so that the hydraulic oil inside the connecting elastic bag 419 is introduced into the interior of the inner long box 412, and the hydraulic oil is introduced into the connecting flat box 413 and the telescopic bottom sleeve 415 through the liquid guide circular notch 414. After the pressure inside the telescopic bottom sleeve 415 rises, it expands and bulges downward to increase the lateral wind receiving area of ​​the power cable.

[0071] When the cable is affected by wind, it can be shaken by the telescopic bottom sleeve 415. At the same time, since the expansion amount of each section of the telescopic bottom sleeve 415 is different, each section of the cable will shake with different amplitudes under the action of the side wind, and then rainwater and snow will fall off and separate from the outside of the cable during the shaking process of the cable, so as to realize continuous cleaning of the outside of the cable;

[0072] When it is necessary to protect the inside of the cable, each component is installed into the limiting silicone sleeve 3 by connecting the central rubber strip 501, and the rubber insulating sleeve 2 is limitedly clamped by installing the central capsule 502 and the limiting arc capsule 503. During the continuous operation of the cable, heat will continue to accumulate inside. The heat absorbing inner block 509 can quickly absorb the heat inside the cable, and the heat-conducting oil inside the expanding short liquid capsule 507 can quickly absorb heat and expand. The expansion of the expanding short liquid capsule 507 is used to squeeze the compressed airbag 510, so that the gas inside the compressed airbag 510 can be introduced into the extruded long airbag 511, and the arc-shaped filling liquid capsule 504 inside the limiting arc capsule 503 is squeezed during the expansion of the extruded long airbag 511, so that the arc-shaped filling liquid capsule 504 is squeezed and deformed outward, so that the arc-shaped filling liquid capsule 504 can fill the outer ring of the inner cavity of the limiting arc capsule 503, so that the heat dissipated from the outside of the rubber insulating sleeve 2 is transferred outward through the limiting arc capsule 503;

[0073] At the same time, as the cable continues to heat up, the temperature of the heat transfer oil inside the front buffer liquid capsule 505 will also rise synchronously, and the internal support cotton strip 508 will provide auxiliary support to the inside of the front buffer liquid capsule 505, and then the heat inside the cable will be absorbed and stored by the front buffer liquid capsule 505 and the expansion short liquid capsule 507, and the compression airbag 510 will be squeezed in two stages through the expansion of the front buffer liquid capsule 505 and the expansion short liquid capsule 507, so that a large amount of gas inside the compression airbag 510 is squeezed into the inside of the extruded long airbag 511, and then the arc-shaped filling liquid capsule 504 is deformed along the inner wall of the limiting arc-shaped capsule 503 and fits more closely with the limiting silicone sleeve 3, so as to optimize the heat dissipation process inside the cable.

[0074] 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 low-smoke, halogen-free, cross-linked polyethylene insulated power cable, comprising a central conductor (1), characterized in that: The outer side of the central conductor (1) is tightly covered with a rubber insulating sleeve (2), and the outer sides of a plurality of rubber insulating sleeves (2) are jointly covered with a limited position silicone sleeve (3); An external dynamic telescopic cleaning mechanism (4) is arranged outside the limiting silicone sleeve (3), and the external dynamic telescopic cleaning mechanism (4) is used to adjust the structure of the cable exterior so that the cable can maintain different structural forms in different temperature environments, thereby realizing auxiliary cleaning of the cable exterior; The external dynamic telescopic cleaning mechanism (4) comprises an axial supporting inner ring (401); The outer side of the limiting silicone sleeve (3) is evenly and equidistantly coated with an axial support inner ring (401), and the outer ring of the axial support inner ring (401) is tightly coated with an axial protection outer ring (402); The axial protection outer ring (402) and the filling soft rubber sleeve (406) are jointly coated with an isolation protection rubber sleeve (408) on the outside, the isolation protection rubber sleeve (408) is tightly coated with an installation outer rubber sleeve (409) on the outer ring, a installation bottom groove (410) is provided through the middle of the bottom end of the outer side of the installation outer rubber sleeve (409), and limited annular grooves (411) are evenly and equidistantly provided on the outer side of the installation outer rubber sleeve (409); An installation inner long box (412) is evenly and equidistantly clamped inside the installation bottom groove (410), a connection flat box (413) is fixedly installed on the top of the inner side of the installation inner long box (412), and liquid guide circular notches (414) are evenly and equidistantly formed on both sides of the connection flat box (413), and a telescopic bottom sleeve (415) is fixedly connected to the middle of the bottom surface of the connection flat box (413); An arc-shaped installation box (416) is fixedly connected between the middle parts of both sides of the installation inner long box (412) corresponding to the inner wall of the installation outer rubber sleeve (409), a center limiting air bag (417) is fixedly connected to the middle part of the inner cavity of the installation arc-shaped box (416), a telescopic counterweight rubber strip (418) is fixedly connected to the top of the center limiting air bag (417) corresponding to the top position inside the installation arc-shaped box (416), connecting elastic capsules (419) are connected to the bottom ends of the telescopic counterweight rubber strip (418), and a binding hoop (420) is symmetrically clamped inside the limiting annular groove (411); The bottom end of the installation arc box (416) is connected to the inner cavity of the installation inner long box (412) through a connecting flat tube, the outer side of the telescopic counterweight rubber strip (418) is tightly slidably fitted with the inner wall of the installation arc box (416), the outer arc surface of the bundling hoop (420) is flush with the outer side of the installation outer rubber sleeve (409), the end of the installation inner long box (412) is tightly fitted with the inner wall of the bundling hoop (420), and the connection elastic bag (419) is filled with hydraulic oil.

2. The low-smoke zero-halogen cross-linked polyethylene insulated power cable according to claim 1, characterized in that: Positioning inner holes (403) are evenly and evenly penetrated at the end faces of the axial support inner ring (401) and the edge of the end faces of the axial protection outer ring (402); a circumferential inner rubber sleeve (404) is evenly and evenly sleeved on the outer side of the limiting silicone sleeve (3) at a position corresponding to the end of the axial support inner ring (401); a supporting rubber sheet (405) is evenly and evenly fixedly connected to the outer side of the circumferential inner rubber sleeve (404) along the circumferential direction; a filling soft rubber sleeve (406) is tightly sleeved on the outer side of the circumferential inner rubber sleeve (404) at a position corresponding to the side of the supporting rubber sheet (405); and a telescopic circular slot hole (407) is evenly and evenly penetrated at the edge of the end face of the filling soft rubber sleeve (406).

3. The low-smoke zero-halogen cross-linked polyethylene insulated power cable according to claim 1, characterized in that: The outer rubber ring of the axial support inner ring (401) and the inner rubber ring of the axial protection outer ring (402) are interlaced and matched with each other, and both the axial support inner ring (401) and the axial protection outer ring (402) can be elastically telescopically deformed.

4. The low-smoke zero-halogen cross-linked polyethylene insulated power cable according to claim 1, characterized in that: The filling soft rubber sleeve (406) is softer in texture than the inner circumferential rubber sleeve (404) and the supporting film (405), and the outer side of the filling soft rubber sleeve (406) is tightly fitted to the side surface of the supporting film (405).

5. The low-smoke zero-halogen cross-linked polyethylene insulated power cable according to claim 1, characterized in that: The outer side of the top of the installation inner long box (412) is tightly slidably fitted with the inner wall of the installation bottom groove (410), the ends of two adjacent installation inner long boxes (412) are tightly fitted, and the outer top of the connecting flat box (413) is fixedly connected with the inner wall of the installation inner long box (412).

6. The low-smoke zero-halogen cross-linked polyethylene insulated power cable according to claim 1, characterized in that: The inner cavity of the installation inner long box (412) and the inner cavity of the connection flat box (413) are connected to each other via a liquid guide circular notch (414), and the outer top of the telescopic bottom sleeve (415) is tightly and fixedly connected to the inner wall of the bottom of the installation inner long box (412).

7. The low-smoke zero-halogen cross-linked polyethylene insulated power cable according to claim 1, characterized in that: An internal differential telescopic support mechanism (5) is arranged inside the limiting silicone sleeve (3), and the internal differential telescopic support mechanism (5) is used to fill and support the inside of the cable and provide heat dissipation for the inside of the cable during use of the cable; The internal differential telescopic support mechanism (5) comprises a connecting central rubber strip (501); A connecting center rubber strip (501) is evenly and equidistantly arranged at the middle position between the multiple rubber insulating sleeves (2) corresponding to the inner side of the limiting silicone sleeve (3); the end of the connecting center rubber strip (501) is fixedly connected to a mounting center capsule (502); the three side surfaces of the mounting center capsule (502) are fixedly connected to the gaps on the sides of the rubber insulating sleeve (2); and the outer circle of the inner cavity of the limiting arc-shaped capsule (503) is filled with an arc-shaped filling liquid capsule (504); One end of the interior of the installation center capsule (502) is filled with a pre-buffering liquid capsule (505), a central connecting tube (506) is fixedly connected to the middle of one end of the pre-buffering liquid capsule (505), an expansion short liquid capsule (507) is fixedly connected to one end of the central connecting tube (506) at a position corresponding to the interior of the installation center capsule (502), an internal supporting cotton strip (508) is filled in the middle of the inner cavity of the pre-buffering liquid capsule (505), and a heat absorbing inner block (509) is filled in the middle of the inner cavity of the expansion short liquid capsule (507); The interior of the installation center capsule (502) is coated with a compressed air bag (510) at a position corresponding to the outer side of the center connection tube (506), and the side of the compressed air bag (510) is connected to an inner cavity of the arc-shaped filling liquid bag (504) via a pipeline with an extruded long air bag (511).

8. The low-smoke zero-halogen cross-linked polyethylene insulated power cable according to claim 7, characterized in that: The outer sides of the front buffer liquid capsule (505) and the short expansion liquid capsule (507) are tightly slidably fitted with the inner wall of the installation center capsule (502), and the interiors of the front buffer liquid capsule (505) and the short expansion liquid capsule (507) are filled with heat transfer oil.

9. The low-smoke zero-halogen cross-linked polyethylene insulated power cable according to claim 7, characterized in that: The specific heat capacity of the heat-absorbing inner block (509) is smaller than the specific heat capacity of the internal supporting cotton strip (508) and the heat-conducting oil, the outer side of the extruded long air bag (511) is tightly fitted with the inner wall of the arc-shaped filling liquid bag (504), and the outer arc surface of the installation center bag (502) and the outer arc surface of the limiting arc bag (503) are tightly fitted with the outer side of the rubber insulating sleeve (2).

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