Anti-fracture low-voltage power cable based on flexible support

Abstract

The invention discloses an anti-fracture low-voltage power cable based on flexible support, and relates to the technical field of cables, a plurality of forward rotation processing holes are equidistantly formed in the outer side of one end of an external fixing and protecting pipe, forward rotation fixing elastic ribs are embedded in the inner sides of the forward rotation processing holes, and a plurality of reverse rotation processing holes are equidistantly formed in the inner side of one end of the external fixing and protecting pipe; according to the cable, the problems that in the prior art, due to the fact that the interior of the cable is pressed tightly, a protection part cannot be buffered, meanwhile, the direction of the protection part is not guided, when the cable is bent, the protection part cannot be blocked, and the protection part cannot be blocked are effectively solved. In order to solve the problem that the protection component cannot actively perform synchronous position adjustment in the prior art, through multi-section buffer cooperation and overall support limitation, and adaptive filling treatment is performed on the protection component, the situation that the protection effect is reduced due to thinning of the protection component is reduced, meanwhile, flexible support is utilized, the situation of rigid extrusion fracture damage is avoided, and the service life of the protection component is prolonged. And the tensile and anti-bending capabilities of the cable are improved.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a fracture-resistant low-voltage power cable based on flexible support. Background Technology

[0002] Cables are conductors covered with insulation, protective layers, and shielding layers used to transmit power or signal current and signal voltage. According to voltage, they can be divided into high-voltage cables and low-voltage cables. Low-voltage cables usually refer to power cables with a rated voltage of 0.6 / 1kV and below, used for transmitting and distributing electrical energy. Low-voltage cables consist of three parts: conductor, insulation layer, and protective layer. Low-voltage cables come in several types, such as single-core, double-core, three-core, and four-core.

[0003] However, when existing low-voltage power cables are laid and pulled, they are affected by bending and folding. At the same time, because the internal compression of the cable is relatively tight, the protective components cannot effectively buffer the bending. Furthermore, the protective components are not guided in direction, which means that the protective components cannot actively adjust their position synchronously when the cable is bent. This causes the cable to be stressed at one end, and the protective components become thinner, making them prone to breakage and damage. Summary of the Invention

[0004] This invention provides a fracture-resistant low-voltage power cable based on flexible support, which can effectively solve the problems mentioned in the background art. When existing low-voltage power cables are laid and pulled, they are affected by bending and folding. At the same time, because the internal compression of the cable is relatively tight, the protective components cannot effectively buffer the bending when the cable is bent. In addition, the protective components are not guided in direction, so the protective components cannot actively adjust their positions synchronously when the cable is bent. This causes the cable to be stressed at one end, and the protective components become thinner, making them prone to breakage and damage.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fracture-resistant low-voltage power cable based on flexible support, comprising an outer fixed protective tube, wherein an inner transmission combined core is provided on the inner side of the outer fixed protective tube; A pressure regulating and protective assembly is provided on the inner side of the outer fixed protective tube; The pressure regulating and protection assembly includes a positive rotation processing hole; The outer fixed protective tube has several positive rotation processing holes equidistantly opened on the outer side of one end, and a positive rotation fixed elastic rib is embedded in the inner side of the positive rotation processing hole. The outer fixed protective tube has several anti-rotation processing holes equidistantly opened on the inner side of one end, and anti-rotation fixed elastic ribs are embedded in the inner side of the anti-rotation processing holes. An inner insulating tube is installed inside the outer fixed protective tube. Several interlocking grooves are equally spaced on the outer end of the inner fixed insulating tube and the inner end of the outer fixed protective tube. An outer anti-stab plate is embedded inside the interlocking groove; The inner side of the inner insulating tube is equidistantly bonded with a number of closely spaced arc adhesive pieces, and the inner side of the multiple closely spaced arc adhesive pieces is equidistantly bonded with a number of fixed support and positioning rings. Several metal shielding strips are installed at equal intervals on the inner side of the multiple fixed support positioning rings.

[0006] According to the above technical solution, the inner transmission composite core is a stranded wire, the longitudinal section of the outer protective anti-stab sheet and the dense arc adhesive sheet is arc-shaped, and the side ends of the multiple outer protective anti-stab sheets are slidably attached.

[0007] According to the above technical solution, a number of partition insulating tubes are equidistantly arranged on the inner side of the outer fixed protective tube, and a hollow press-wound convex strip is wound around the side end of the partition insulating tube. A medium-pressure airbag is bonded between the hollow press-wound convex strip and the separator insulating tube. A porous, differently supported flexible column is installed between multiple insulating tubes, and several central support ribs are equidistantly embedded in the inner side of the porous, differently supported flexible column. The porous flexible support column has several segmented pressing grooves equidistantly opened on its side ends; The inner side of the insulating tube is equidistantly bonded with several mica barrier strips. The outer end of the inner transmission combined core is fitted with an inner spring insulating strip, and protective spring adhesive pieces are equidistantly bonded to the side ends of multiple inner spring insulating strips. Multiple protective bullet adhesive patches are equipped with an inner cavity assembly frame on their outer sides, and several misaligned bullet repair rings are equidistantly sleeved on the side ends of the protective bullet adhesive patches. The inner side of the inner cavity assembly frame is provided with a liquid-retaining sponge pad, and the outer end of the inner cavity assembly frame is marked with several press-fit shielding strips at equal intervals. Several double-convex hollow elastic rings are equidistantly sleeved on the side ends of the multiple press-fit shielding strips; A semi-conductive sheet is bonded to the inner side of the mica barrier strip.

[0008] According to the above technical solution, the inner diameter of the fixed support positioning ring is equal to the outer diameter of the metal shielding strip, the hollow pressure-wound convex strip is spiral-shaped, and there are three of each of the hollow pressure-wound convex strip, the medium-pressure positioning airbag, and the separating insulating tube.

[0009] According to the above technical solution, the outer end of the porous flexible support column is bonded to the inner end of the airbag in the middle pressure position, the two adjacent inner cavity assembly frames are bonded to each other, and the side end of the misaligned elastic repair ring is attached to the side end of the inner cavity assembly frame and the side end of the press-fit shielding strip.

[0010] According to the above technical solution, two adjacent press-fit shielding strips are connected to each other, and the cross-section and longitudinal section of the misaligned elastic ring and the double-convex hollow elastic ring are both arc-shaped.

[0011] According to the above technical solution, a fixed rotation counter-pressure assembly is provided on the outside of the outer fixed protective tube; The fixed-rotation counter-pressure assembly includes a connector isolation sleeve; The outer end of the external fixed protective tube is pressed with a joint isolation sleeve, and a compression airbag is bonded to the inner side of the joint isolation sleeve. The outer fixed protective tube is sleeved with a pressure limiting ring block at one end, and a pair of clamping ring blocks are hinged to one end of the pressure limiting ring block. One end of the clamping ring block is embedded with a fixing nut, and one end of the fixing nut is connected to a processing bolt via a thread; Both the pressure limiting ring block and the clamping ring block have multi-groove elastic blocks installed at one end, and several multi-groove elastic rods are equidistantly clamped to the side end of the multi-groove elastic blocks.

[0012] According to the above technical solution, an outer limiting elastic block is installed at one end of the pressure limiting ring block and the clamping ring block at the position corresponding to the multi-groove elastic block. A multi-convex correction protective pad is installed on the inner side of the multi-groove elastic block and the outer side of the outer limiting elastic block. The outer sides of the compression ring and the clamping ring are bonded with a treatment adhesive pad, and the side end of the treatment adhesive pad is bonded with a double convex adhesive block. Several puncture-resistant outer protective plates are equidistantly bonded between the two biconvex adhesive blocks; There are two of each of the pressure limiting ring and the clamping ring, and the side ends of the pressure limiting ring and the clamping ring are attached together.

[0013] According to the above technical solution, the processing bolt is fitted into the side end of the pressure limiting ring block, and the side ends of the multi-groove elastic block and the multi-convex correction protective pad are attached to the side end of the outer fixed protective tube.

[0014] According to the above technical solution, the outer end of the multi-groove elastic block is attached to the inner end of the outer limiting elastic block, the longitudinal section of the double-convex adhesive block and the anti-stab outer protective plate are both arc-shaped, and there are four double-convex adhesive blocks.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Equipped with a pressure-adjusting protective assembly, the inner transmission combined core, inner spring insulation strip, and protective spring adhesive sheet are pressed towards the inner cavity assembly frame. Utilizing the hollow structure of the inner cavity assembly frame, the spring repair ring is deformed under pressure, and the press-fit shielding strip self-twists and engages, while the double-convex hollow elastic ring is pressed together. The internal air flows freely, the pressure at the stressed end decreases, and a small-amplitude torsion occurs. The unstressed end is affected by air pressure, expanding and filling to press and limit the press-fit shielding strip. Through the force-fed flipping traction and gap compression filling of the misaligned spring repair ring, the space at the compressed position is expanded, and the inner arc position of the bend is filled and pressed to ensure the tightness of the internal compression. At the same time, the outer double-convex hollow elastic ring provides elastic buffering and pressing limit. Through multi-segment cavity buffering and adaptive pressing limit, it is prevented that the outer arc position is subjected to bidirectional compression and tension for a long time when bent under pressure, which would cause it to thin and be damaged by pressure puncture. The overall bending is divided into multiple small-amplitude bends by using porous flexible columns and segmented pressing grooves, reducing the thinning of the center point due to stress caused by overall bending and folding. At the same time, hollow pressure-wound convex strips and medium-pressure airbags provide pneumatic buffering, enabling adaptive adjustment of the outer arc thickness during bending to ensure the thickness of the cable outer sheath. In conjunction with the positive and negative spiral elastic ribs, the outer fixed sheath is elastically supported, and the elastic spiral limit of the positive and negative spiral elastic ribs controls the torsional bending direction of the outer fixed sheath, preventing the cable from being wrapped and squeezed. Through the pressing and layering thickening treatment and segmented stress, the cable outer sheath is prevented from thinning under bending stress, while limiting its rotation and torsion direction and angle, thereby preventing it from being damaged by self-winding and pressure. By employing internal elastic deformation buffering, self-cavity switching processing, and external flexible extrusion deformation, along with its adaptive position adjustment and torsional direction restriction, this technology effectively solves the problems in existing technologies where the internal compression of the cable is too tight, failing to buffer the protective components and lacking directional guidance, resulting in the protective components being unable to actively adjust their position synchronously when the cable bends. Through multi-segment buffering and overall support restriction, and adaptive filling processing of the protective components, the reduction in protective effectiveness due to thinning of the protective components is mitigated. At the same time, the use of flexible support avoids rigid extrusion fracture damage, thereby improving the cable's tensile and bending resistance.

[0016] 2. A fixed-rotation compression assembly is provided. The compression ring and clamping ring are fixed to the side end of the outer fixed protective tube using fixing nuts and processing bolts. This presses and fixes the multi-groove elastic block, multi-groove elastic rod, outer limiting elastic block, and multi-convex correction protective pad to the side end of the outer fixed protective tube. The processing adhesive pad, double-convex adhesive block, and anti-puncture outer protective plate provide protection and support for the external multi-convex correction protective pad and outer limiting elastic block. Combined with the multi-groove elastic rod, multi-groove elastic block, and outer limiting elastic block, elastic limiting treatment controls the cable bending angle, preventing excessive bending and breakage. The bending position is reinforced to reduce the probability of damage from external impacts. Combined with the joint isolation sleeve and compression airbag, the cable joint is pressed and fixed, achieving joint reinforcement and overall sealing, improving the overall safety of the cable.

[0017] In summary, by cooperating with the pressure-adjusting protection assembly and the fixed-rotation pressure-adjusting assembly, through multi-segment internal and external buffer support, and by utilizing external protection and bending limitation, the cable's internal and external components can be self-adjusted, reducing damage caused by stress deformation and mutual compression deformation, lowering the probability of cable breakage, and thus greatly improving the cable's quality. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0019] In the attached diagram: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the pressure regulating and protection assembly of the present invention; Figure 3 This is a schematic diagram of the installation structure of the insulating tube of the present invention; Figure 4 This is a schematic diagram of the installation structure of the inner spring insulating strip of the present invention; Figure 5 This is a schematic diagram of the installation structure of the press-fit shielding strip of the present invention; Figure 6 This is a schematic diagram of the installation structure of the mica barrier strip of the present invention; Figure 7 This is a schematic diagram of the structure of the fixed-rotation counter-pressure assembly of the present invention; Figure 8 This is a schematic diagram of the installation structure of the multi-convex correction protective pad of the present invention; Figure 9 This is a schematic diagram of the installation structure of the double-convex adhesive block of the present invention; Figure 10 This is a schematic diagram of the installation structure of the connector isolation sleeve of the present invention; The diagram labels are: 1. Outer fixed protective tube; 2. Inner transmission composite conductor. 3. Pressure Adjustment and Protection Assembly; 301. Forward Rotation Treatment Hole; 302. Forward Rotation Fixed Spring Rib; 303. Reverse Rotation Treatment Hole; 304. Reverse Rotation Fixed Spring Rib; 305. Inner Fixed Insulating Tube; 306. Embedded Misalignment Groove; 307. Outer Protective Anti-Stab Sheet; 308. Air-Guiding Adhesive Sheet; 309. Fixed Support and Positioning Ring; 310. Metal Shielding Strip; 311. Separating Insulating Tube; 312. Hollow Press-Wound Differential Convex Strip; 3 13. Medium-pressure airbag; 314. Porous flexible column with varying support; 315. Central support rib; 316. Segmented pressing groove; 317. Mica barrier strip; 318. Inner elastic insulating strip; 319. Protective elastic adhesive patch; 320. Inner cavity assembly frame; 321. Misaligned elastic repair ring; 322. Liquid-retaining sponge pad; 323. Press-fit shielding strip; 324. Double-convex hollow elastic ring; 325. Semi-conductive sheet; 4. Fixed-rotation counter-pressure assembly; 401. Connector isolation sleeve; 402. Compression airbag; 403. Compression limiting ring block; 404. Clamping ring block; 405. Fixing nut; 406. Treatment bolt; 407. Multi-groove elastic block; 408. Multi-groove elastic rod; 409. Outer limiting elastic block; 410. Multi-convex correction protective pad; 411. Treatment adhesive pad; 412. Double-convex adhesive block; 413. Puncture-proof outer protective plate. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] Example: Figure 1-10 The present invention provides a technical solution, a fracture-resistant low-voltage power cable based on flexible support, including an outer fixed protective tube 1, and an inner transmission combined core 2 is provided on the inner side of the outer fixed protective tube 1. The inner transmission combined core 2 is a stranded wire, which ensures that the inner transmission combined core 2 can be self-corrected and adjusted when bent. A pressure regulating and protective assembly 3 is provided on the inner side of the external fixed protective pipe 1; The pressure adjustment and protection assembly 3 includes a forward rotation processing hole 301, a forward rotation fixed elastic rib 302, a reverse rotation processing hole 303, a reverse rotation fixed elastic rib 304, an inner fixed insulating tube 305, an embedded misalignment groove 306, an outer protective anti-stab piece 307, a dense arc-blocking adhesive piece 308, a fixed support positioning ring 309, a metal shielding strip 310, a separating insulating tube 311, a hollow pressure-wound convex strip 312, a medium-slow pressure positioning airbag 313, a multi-hole convex flexible column 314, a medium-support fixed straight rib 315, a segmented pressure groove 316, a mica barrier strip 317, an inner elastic insulating strip 318, a protective elastic adhesive piece 319, an inner cavity assembly frame 320, a misalignment elastic repair ring 321, a liquid-retaining sponge pad 322, a pressure-inserted shielding strip 323, a double-convex hollow elastic ring 324, and a semi-conductive sheet 325. A number of positive rotation processing holes 301 are equidistantly opened on the outer side of one end of the outer fixed protective tube 1, and a positive rotation fixed elastic rib 302 is embedded in the inner side of the positive rotation processing hole 301. A plurality of anti-rotation processing holes 303 are equidistantly opened on the inner side of one end of the outer fixed protective tube 1, and anti-rotation fixed elastic ribs 304 are embedded in the inner side of the anti-rotation processing holes 303. An inner insulating tube 305 is installed inside the outer fixed protective tube 1. Several interlocking grooves 306 are equally spaced on the outer end of the inner fixed insulating tube 305 and the inner end of the outer fixed protective tube 1. An outer protective anti-stab plate 307 is embedded inside the interlocking groove 306; The inner insulating tube 305 has several closely spaced arc-sealed adhesive pieces 308 bonded at equal intervals on its inner side. The longitudinal section of the outer protective anti-stab piece 307 and the closely spaced arc-sealed adhesive piece 308 is arc-shaped. The side ends of the multiple outer protective anti-stab pieces 307 slide and fit together to achieve steady fitting and self-rotation alignment. The inner side of the multiple closely spaced arc-sealed adhesive pieces 308 has several fixed support and positioning rings 309 bonded at equal intervals. Several metal shielding strips 310 are equidistantly installed on the inner side of multiple fixed support locking rings 309. The inner diameter of the fixed support locking ring 309 is equal to the outer diameter of the metal shielding strip 310, so as to realize inner limit locking and fixed clamping. Several partition insulating tubes 311 are equidistantly arranged on the inner side of the outer fixed protective tube 1, and hollow press-wound convex strips 312 are wound around the side ends of the partition insulating tubes 311. A medium-pressure airbag 313 is bonded between the hollow-wound convex strip 312 and the separator insulating tube 311. The hollow-wound convex strip 312 is spiral-shaped. There are three hollow-wound convex strips 312, three medium-pressure airbags 313 and three separator insulating tubes 311, which realizes the support, limiting and elastic swing treatment of the middle part of the cable. A porous, differently supported flexible column 314 is installed between multiple insulating tubes 311. The outer end of the porous, differently supported flexible column 314 is bonded to the inner end of the airbag 313 in the middle pressure position to ensure the stability of the overall sealing treatment and the limiting connection. Several middle support straight ribs 315 are equidistantly embedded in the inner side of the porous, differently supported flexible column 314. The porous flexible column 314 has several segmented pressing grooves 316 evenly spaced on its side ends; Several mica barrier strips 317 are equidistantly bonded to the inner side of the insulating tube 311; The outer end of the inner transmission combined core 2 is fitted with an inner spring insulating strip 318, and multiple inner spring insulating strips 318 are equidistantly bonded with protective spring adhesive pieces 319 on their side ends. Multiple protective bullet adhesive pieces 319 are fitted with inner cavity assembly frames 320 on their outer sides. Adjacent inner cavity assembly frames 320 are bonded together. The side end of the misaligned spring repair ring 321 is attached to the side end of the inner cavity assembly frame 320 and the side end of the press-fit shielding strip 323 to achieve positioning support and elastic misalignment correction. This allows for positional compensation through self-elastic compression during pressing. Several misaligned spring repair rings 321 are equidistantly sleeved on the side end of the protective bullet adhesive piece 319. The cross-section and longitudinal section of the misaligned spring repair ring 321 and the double-convex hollow elastic ring 324 are both arc-shaped to ensure that they can expand, contract, and twist at any position during elastic pressing, thus ensuring the stability of their support and buffering. The inner cavity assembly frame 320 has a liquid-retaining sponge pad 322 on its inner side, and several press-fit shielding strips 323 are equidistantly marked on the outer end of the inner cavity assembly frame 320. Two adjacent press-fit shielding strips 323 are nested together to achieve an overall sealed connection. Multiple press-fit shielding strips 323 have several double-convex hollow elastic rings 324 equidistantly sleeved on their side ends; A semi-conductive sheet 325 is bonded to the inside of the mica barrier tape 317.

[0022] A fixed rotation counter-pressure assembly 4 is provided on the outside of the outer fixed protective tube 1; The fixed-rotation anti-pressure assembly 4 includes a connector isolation sleeve 401, a compression airbag 402, a compression limiting ring block 403, a clamping ring block 404, a fixing nut 405, a processing bolt 406, a multi-groove elastic block 407, a multi-groove elastic rod 408, an outer limiting elastic block 409, a multi-convex correction protective pad 410, a processing adhesive pad 411, a double-convex adhesive block 412, and an anti-puncture outer protective plate 413; A connector isolation sleeve 401 is pressed onto the outer end of the outer fixed protective tube 1, and a compression airbag 402 is bonded to the inner side of the connector isolation sleeve 401. A pressure-limiting ring block 403 is sleeved on one side of the outer fixed protective tube 1, and a pair of clamping ring blocks 404 are hinged to one end of the pressure-limiting ring block 403. A fixing nut 405 is embedded in one end of the clamping ring block 404, and a processing bolt 406 is threadedly connected to the other end of the fixing nut 405. There are two clamping ring blocks 403 and two clamping ring blocks 404. The side ends of the clamping ring blocks 403 and the clamping ring blocks 404 are fitted together, and the processing bolt 406 is sleeved and installed on the side end of the clamping ring block 403 to achieve multi-segment alignment and ensure the accuracy and stability of the connection. Both the compression ring block 403 and the clamping ring block 404 have a multi-groove elastic block 407 installed at one end, and a number of multi-groove elastic rods 408 are equidistantly clamped at the side end of the multi-groove elastic block 407. One end of the pressure limiting ring block 403 and the clamping ring block 404 is equipped with an outer limiting elastic block 409 at the position corresponding to the multi-groove elastic block 407. The side ends of the multi-groove elastic block 407 and the multi-convex correction protective pad 410 are attached to the side end of the outer fixed protective tube 1. The outer end of the multi-groove elastic block 407 is attached to the inner end of the outer limiting elastic block 409 to achieve the outer protective fitting and positioning. The multi-convex correction protective pad 410 is installed on both the inner side of the multi-groove elastic block 407 and the outer side of the outer limiting elastic block 409. The outer sides of the pressure limiting ring block 403 and the clamping ring block 404 are bonded with a treatment adhesive pad 411. The side end of the treatment adhesive pad 411 is bonded with a double convex adhesive block 412. The longitudinal section of the double convex adhesive block 412 and the anti-stab outer protective plate 413 are both arc-shaped. There are four double convex adhesive blocks 412 to ensure the stability of the fit, alignment and airtight protection. Several puncture-resistant outer protective plates 413 are bonded at equal intervals between the two biconvex adhesive blocks 412.

[0023] The working principle and usage process of this invention: During cable laying, workers use traction equipment to pull and move the cable. During the traction process, the outer fixed protective tube 1 is elastically supported by the forward spiral fixed elastic rib 302 and the reverse spiral fixed elastic rib 304. Through their spiral installation state and the elastic self-resetting effect of the forward spiral fixed elastic rib 302 and the reverse spiral fixed elastic rib 304, the rotation of the outer fixed protective tube 1 is restricted, so that it can only be bent directly and cannot be spirally wound. In conjunction with the forward spiral processing hole 301 and the reverse spiral processing hole 303 for position restriction, the cable can be quickly squeezed and reset when it produces a small amplitude spiral and twist, avoiding the situation of spiral winding and squeezing damage to the cable. When the cable needs to be bent and turned, the worker attaches the limiting ring block 403 to the side end of the outer fixed protective tube 1. At this time, the sides of the multi-groove elastic block 407 and the multi-convex correction protective pad 410 are attached to the side end of the outer fixed protective tube 1. The clamping ring block 404 is rotated so that the side end of the limiting ring block 403 is attached to the side end of the clamping ring block 404. The limiting ring block 403 and the clamping ring block 404 are fixed together by the fixing nut 405 and the processing bolt 406, so that the sides of the two sets of multi-groove elastic blocks 407, outer limiting elastic blocks 409 and multi-convex correction protective pads 410 are attached. Thus, the multi-groove elastic blocks 407, multi-groove elastic rods 408, outer limiting elastic blocks 409 and multi-convex correction protective pads 410 are pressed and fixed to the side end of the outer fixed protective tube 1. The processing adhesive pad 411 is then attached to the limiting ring block 404. 03 and the outer end of the clamping ring block 404, then the double convex adhesive block 412 and the treatment adhesive pad 411 are bonded together, so that the double convex adhesive block 412 is installed on the outer end of the clamping ring block 403 and the clamping ring block 404. Then, the anti-stab outer protective plate 413 is bonded to the side end of the double convex adhesive block 412 one by one, so as to realize the protection and support of the external multi-convex correction protective pad 410 and the outer limit elastic block 409. At this time, the cable is rotated, and the multi-groove elastic rod 408 is simultaneously reset to the bending position. With the cooperation of the multi-groove elastic block 407 and the outer limit elastic block 409, the cable is elastically pressed together, so that when the cable is bent, it is pressed and guided by the external limiting component, while limiting its minimum bending angle to avoid the bending angle being too small, which would cause the cable to bend and break internally, thus ensuring the stability and safety of bending during construction. When the cable is bent, the inner transmission composite core 2 and the inner spring insulation strip 318 are squeezed and bent to one side. At this time, the inner transmission composite core 2 and the inner spring insulation strip 318 push the protective spring adhesive piece 319 to press against the inner cavity assembly frame 320, thereby buffering the compression point of the inner transmission composite core 2. The protective spring adhesive piece 319 pushes the misaligned spring repair ring 321 to compress and deform. When the misaligned spring repair ring 321 is compressed, its compressed side is squeezed and flipped, and the uncompressed side is flipped and pulled to press against the side end of the protective spring adhesive piece 319. The gap between two adjacent misaligned spring repair rings 321 is used for compression buffering. In conjunction with the liquid-retaining sponge pad 322 in the inner cavity assembly frame 320, the insulating lubricating oil is continuously discharged under pressure to lubricate the protective spring adhesive sheet 319 and the misaligned spring repair ring 321. The sliding elastic deformation of the misaligned spring repair ring 321 is used to fill and expand the space of the compressed position. The inner arc position of the bend is filled and pressed to ensure the tightness of the internal compression. At the same time, it avoids the outer arc position of the bend from being pulled by high pressure for a long time, which may cause it to become thin. Meanwhile, the multiple outer press-fit shielding strips 323 twist and engage slightly with each other, working in conjunction with the outer double-convex hollow elastic ring 324 for buffering. When the press-fit shielding strip 323 is deformed under pressure, the stressed end of the double-convex hollow elastic ring 324 is compressed. At this time, the air at the stressed end flows to the unstressed end, and it undergoes a slight twist, reducing the stress on the press-fit shielding strip 323 and performing self-correcting filling treatment inside to ensure the stability of its overall press-fit support. At the same time, the elastic pressure adjustment of the double-convex hollow elastic ring 324 ensures that the side end of the press-fit shielding strip 323 is always in contact with the inner cavity assembly frame 320 and the misaligned elastic repair ring 321, ensuring internal protection. To ensure stability and isolation, the insulating tube 311 pushes the porous flexible column 314 in the middle to bend to one side. The segmented pressing groove 316 performs segmented pressing and buffering on the porous flexible column 314, allowing it to fold and unfold in segments under pressure. This reduces the thinning of the center point due to overall bending and folding. The hollow pressure-wound convex strip 312 and the medium-pressure airbag 313 provide pneumatic buffering. By squeezing and changing the air position, the actual thickness of the outer arc of the bend is adjusted through internal airflow, achieving pressure buffering. At the same time, airflow to the inner arc of the bend increases its pressure, achieving overall pressure restriction while ensuring the stability of overall positioning, clamping, and support protection. The multi-hole flexible column 314 is supported and restricted by the central straight rib 315, and external support is provided by the outer positive spiral fixed elastic rib 302 and the negative spiral fixed elastic rib 304. The bending angle of the cable is controlled by the inner and outer double-layer clamping and limiting, so as to avoid the bending angle being too small and causing bending damage to the inner combined core 2. The outer protective anti-puncture plate 307 in the embedded misalignment groove 306 provides anti-puncture restriction for the inside and outside. With the bidirectional insulation protection of the outer fixed protective tube 1 and the inner fixed insulating tube 305, the cable can be effectively insulated and isolated when it is punctured by external sharp objects or when it is protected from internal pressure puncture. With the metal shielding strip 310 and the semi-conductive sheet 325, the inner and outer shielding protection is provided to improve the protection effect of the cable. When two sets of cables are connected to each other, the joint isolation sleeve 401 and the compression airbag 402 are put on the cable joint position and pressed and fixed by the pressing equipment to achieve joint reinforcement and overall sealing, thereby improving the safety of the cable joint.

[0024] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fracture-resistant low-voltage power cable based on flexible support, comprising an outer fixed protective tube (1), characterized in that: The inner side of the outer fixed protective tube (1) is provided with an inner transmission combined wire core (2); The outer fixed protective tube (1) is provided with a pressure regulating and protective component (3) inside. The pressure regulating and protection assembly (3) includes a positive rotation processing hole (301); The outer fixed protective tube (1) has several positive rotation processing holes (301) equidistantly opened on the outer side of one end, and a positive rotation fixed elastic rib (302) is embedded in the inner side of the positive rotation processing hole (301). The outer fixed protective tube (1) has several anti-rotation processing holes (303) equidistantly opened on the inner side of one end, and anti-rotation fixed elastic ribs (304) are embedded in the inner side of the anti-rotation processing holes (303). An inner insulating tube (305) is installed inside the outer fixed protective tube (1). A number of interlocking grooves (306) are equally spaced on the outer end of the inner fixed insulating tube (305) and the inner end of the outer fixed protective tube (1). An outer protective stab-proof piece (307) is embedded inside the interlocking groove (306). The inner insulating tube (305) has several closely spaced arc adhesive pieces (308) bonded at equal intervals on its inner side, and several fixed support locking rings (309) are bonded at equal intervals on the inner side of the multiple closely spaced arc adhesive pieces (308). Several metal shielding strips (310) are installed at equal intervals on the inner side of the multiple fixed support positioning rings (309).

2. The fracture-resistant low-voltage power cable based on flexible support according to claim 1, characterized in that, The inner transmission combined core (2) is a stranded wire, and the longitudinal section of the outer protective anti-stab plate (307) and the dense arc adhesive plate (308) is arc-shaped, with the side ends of multiple outer protective anti-stab plates (307) slidingly attached.

3. A fracture-resistant low-voltage power cable based on flexible support according to claim 1, characterized in that, The outer fixed protective tube (1) has several partition insulating tubes (311) arranged at equal intervals on its inner side, and the side ends of the partition insulating tubes (311) are wrapped with hollow pressure-wound convex strips (312). A medium-pressure airbag (313) is bonded between the hollow pressure-wound convex strip (312) and the separator insulating tube (311). A porous, differently supported flexible column (314) is installed between multiple of the aforementioned insulating tubes (311), and a number of central support straight ribs (315) are equidistantly embedded in the inner side of the porous, differently supported flexible column (314). The porous flexible column (314) has several segmented pressing grooves (316) evenly spaced on its side ends. The inner side of the insulating tube (311) is equidistantly bonded with several mica barrier strips (317). The outer end of the inner transmission combined core (2) is fitted with an inner spring insulating strip (318), and the side ends of the multiple inner spring insulating strips (318) are equidistantly bonded with protective spring adhesive pieces (319). An inner cavity assembly frame (320) is installed on the outer side of multiple protective bullet adhesive pieces (319), and several misaligned bullet repair rings (321) are equidistantly sleeved on the side ends of the protective bullet adhesive pieces (319). The inner cavity assembly frame (320) has a liquid storage sponge pad (322) on its inner side, and a number of press-fit shielding strips (323) are equidistantly marked on the outer side of the inner cavity assembly frame (320). Several double-convex hollow elastic rings (324) are equidistantly sleeved on the side ends of the multiple press-fit shielding strips (323). A semiconductive sheet (325) is bonded to the inner side of the mica barrier strip (317).

4. A fracture-resistant low-voltage power cable based on flexible support according to claim 3, characterized in that, The inner diameter of the fixed support ring (309) is equal to the outer diameter of the metal shielding strip (310). The hollow pressure-wound convex strip (312) is spiral in shape. There are three hollow pressure-wound convex strips (312), three medium-pressure airbags (313), and three separator insulating tubes (311).

5. A fracture-resistant low-voltage power cable based on flexible support according to claim 3, characterized in that, The outer end of the porous flexible column (314) is bonded to the inner end of the airbag (313) in the middle pressure position, and the two adjacent inner cavity assembly frames (320) are bonded to each other. The side end of the misaligned elastic repair ring (321) is attached to the side end of the inner cavity assembly frame (320) and the side end of the press-fit shielding strip (323).

6. A fracture-resistant low-voltage power cable based on flexible support according to claim 3, characterized in that, The two adjacent press-fit shielding strips (323) are connected to each other, and the cross-section and longitudinal section of the misaligned elastic ring (321) and the double-convex hollow elastic ring (324) are both arc-shaped.

7. A fracture-resistant low-voltage power cable based on flexible support according to claim 1, characterized in that, The outer fixed protective tube (1) is provided with a fixed rotation counter-pressure assembly (4) on its outer side; The fixed-rotation counter-pressure assembly (4) includes a connector isolation sleeve (401). The outer end of the outer fixed protective tube (1) is pressed with a joint isolation sleeve (401), and the inner side of the joint isolation sleeve (401) is bonded with a compression airbag (402). The outer fixed protective tube (1) is sleeved with a pressure limiting ring block (403) at one end, and a clamping ring block (404) is hinged to one end of the pressure limiting ring block (403). One end of the clamping ring block (404) is embedded with a fixing nut (405), and the other end of the fixing nut (405) is connected to a processing bolt (406) by a thread. Both the pressure limiting ring block (403) and the clamping ring block (404) have a multi-groove elastic block (407) installed at one end, and a number of multi-groove elastic rods (408) are equidistantly clamped at the side end of the multi-groove elastic block (407).

8. A fracture-resistant low-voltage power cable based on flexible support according to claim 7, characterized in that, One end of the compression ring block (403) and the clamping ring block (404) is equipped with an outer limiting elastic block (409) at the position corresponding to the multi-groove elastic block (407). A multi-convex correction protective pad (410) is installed on the inner side of the multi-groove elastic block (407) and the outer side of the outer limiting elastic block (409). The outer sides of the compression ring block (403) and the clamping ring block (404) are bonded with a treatment adhesive pad (411), and the side end of the treatment adhesive pad (411) is bonded with a double convex adhesive block (412). A plurality of puncture-resistant outer protective plates (413) are bonded at equal intervals between the two biconvex adhesive blocks (412). There are two of each of the pressure limiting ring block (403) and the clamping ring block (404), and the side ends of the pressure limiting ring block (403) and the clamping ring block (404) are attached together.

9. A fracture-resistant low-voltage power cable based on flexible support according to claim 8, characterized in that, The processing bolt (406) is fitted onto the side end of the pressure limiting ring block (403), and the side ends of the multi-groove elastic block (407) and the multi-convex correction protective pad (410) are attached to the side end of the outer fixed protective tube (1).

10. A fracture-resistant low-voltage power cable based on flexible support according to claim 8, characterized in that, The outer end of the multi-groove elastic block (407) is attached to the inner end of the outer limiting elastic block (409). The longitudinal section of the double-convex adhesive block (412) and the anti-stab outer protective plate (413) are both arc-shaped. There are four double-convex adhesive blocks (412).

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