Crosslinked polyethylene insulated power cable with anti-seismic function

Abstract

The invention relates to the technical field of cables, in particular to a cross-linked polyethylene insulated power cable with an anti-seismic function, which comprises a plurality of bases; and the number of the fixing mechanisms corresponds to that of the bases, each fixing mechanism comprises a buffering assembly arranged on the upper end face of the corresponding base, and pressure reducing assemblies are arranged on the two sides of the interior of each buffering assembly. Through a buffer assembly, a pressure reduction assembly, a resistance assembly, a contraction assembly and a clamping angle assembly in the fixing mechanism, the cable is fixed when passing through a sea-crossing / river-crossing bridge and a subway track intersection and the like, flexible consumption is carried out on the cable through bridge low-frequency large-amplitude shaking caused by strong wind or high-frequency mechanical resonance generated by train running, and therefore the cable can be fixed in the sea-crossing / river-crossing bridge and subway track intersection. Therefore, the shaking amplitude and high-frequency mechanical resonance of the cable are reduced, stress concentration and metal fatigue caused by rigid connection are avoided, the service life of the cable in an extreme dynamic environment is prolonged, and the power supply safety of the cable in the extreme dynamic environment is improved.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and specifically to a cross-linked polyethylene insulated power cable with shock-resistant function. Background Technology

[0002] A cross-linked polyethylene (XLPE) insulated power cable with seismic resistance is a special cable used in power transmission systems. While maintaining the excellent electrical insulation performance of XLPE, it adds a spiral metal armor, tensile buffer layer, or elastic support structure between the conductor shielding layer, insulation layer, or sheath layer. Utilizing the rigid support of the metal skeleton and the energy absorption and shock absorption effect of the elastic material, it effectively absorbs and disperses the shear force and destructive force generated by earthquakes or mechanical vibrations, preventing the cable from breaking, the insulation layer from being damaged, or the joints from falling off during severe shaking. This ensures the continuity and safety of power supply in extreme vibration environments.

[0003] In existing applications of ordinary cross-linked polyethylene insulated power cables in cross-sea / cross-river bridges and subway rail transit, the fixing clamps typically use rigid connections to tightly lock the cables, preventing significant relative displacement between the cables and the supporting structures to release stress. When encountering low-frequency large-amplitude swaying of the bridge caused by strong winds or high-frequency mechanical resonance generated by train movement, this rigid constraint forces the cable body to vibrate synchronously and violently with the external structure, resulting in huge shear forces and fatigue stresses inside the cable and at the clamping points. Ultimately, this leads to cracking of the cable insulation layer due to long-term alternating loads, strand breakage of the conductor due to repeated pulling, and even loosening of the cable joints due to stress concentration. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a cross-linked polyethylene insulated power cable with shock-resistant function. This effectively solves the problem that when encountering strong winds causing low-frequency large-amplitude swaying of bridges or high-frequency mechanical resonance generated by train travel, the rigid constraint forces the cable body to vibrate synchronously and violently with the external structure, leading to cracking of the cable insulation layer due to long-term alternating loads and strand breakage of the conductor due to repeated pulling.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a cross-linked polyethylene insulated power cable with shock-resistant function, comprising: The base has multiple bases; The fixing mechanism corresponds to the number of bases. The fixing mechanism includes a buffer assembly disposed on the upper surface of the base. Both sides of the buffer assembly are provided with pressure-reducing components. A resistance component is disposed between two pressure-reducing components. A contraction component is disposed on the upper surface of the buffer assembly. A clamping angle component is disposed on the upper surface of the contraction component. An impact-resistant mechanism, the number of which corresponds to the number of fixing mechanisms, is disposed inside the clamping angle assembly; The deformation mechanism is always less than one impact-resistant mechanism, and the deformation mechanism is located between two adjacent impact-resistant mechanisms.

[0006] Preferably, the buffer assembly includes a buffer box fixedly connected to the upper end face of the base, and pressure detectors are fixedly connected to both sides of the buffer box in the width direction; The two pressure-reducing components are respectively disposed on the inner walls of both sides of the buffer box along its length. Each pressure-reducing component includes a slide rail fixedly connected to the middle position of the inner wall of the buffer box. Multiple elastic airbags are linearly arrayed on both sides of the inner wall of the slide rail along its length. A sliding plate is fixedly connected to the other side of each elastic airbag.

[0007] Preferably, the resistance component includes a slider slidably connected between two slide plates, a resistance block is fixedly connected between the two sliders, and square openings are provided on both sides of the resistance block in the width direction. A honeycomb block is fixedly connected to the two ends of each square opening, and a plurality of hollow rods are fixedly connected to the rectangular array inside the square opening. The resistance block has openings on both sides of its center position. Each opening has a rectangular array of multiple inertial components on its inner top. Each resistance block has a force-bearing block fixedly connected to both sides of its center position. Each force-bearing block has an elastic tube fixedly connected to its other side. The other side of the elastic tube is fixedly connected to the inner wall of the buffer box in the width direction. The elastic tube is filled with gas. The elastic tube corresponds to the position of the pressure detector and is connected to the pressure detector.

[0008] Preferably, the inertial component includes a support rod slidably connected to the top of the setting opening, a counterweight ball fixedly connected to the other end of the support rod, a conical block fixedly connected to the bottom of the counterweight ball, and a counterweight block fixedly connected to the bottom of the conical block.

[0009] Preferably, the shrinkage assembly includes two elastic blocks and one movable block fixedly connected to the upper surface of the buffer box, with the movable block located between the two elastic blocks. The bottom of the movable block is fixedly connected to the top of the resistance block. The buffer box, the two elastic blocks, and the movable block together form a storage area, which is filled with resistance liquid, and the resistance liquid buries the resistance assembly.

[0010] Preferably, the clamping angle assembly includes a square frame fixedly connected to the top of the movable block. The two sides of the square frame in the width direction correspond to the positions of the two elastic blocks. The center positions of the inner walls of the two sides of the square frame in the length direction are fixedly connected to a first rotating shaft. The shaft end of each first rotating shaft is rolledly connected to a mounting block. The two sides of each mounting block facing the two elastic blocks are fixedly connected to a fixing block. Multiple second rotating shafts are linearly arrayed and fixedly connected to the other side of the fixing block in the length direction. The shaft end of each second rotating shaft is rolledly connected to a multi-section rod. The other side of the multi-section rod is fixedly connected to the inner wall of the square frame. The two mounting blocks are fixedly connected to a clamp on the side away from the first rotating shaft.

[0011] Preferably, the impact-resistant mechanism includes a first rubber outer tube clamped between two clamps, a rubber inner tube sleeved inside the first rubber outer tube, and a gap between the first rubber outer tube and the rubber inner tube. The body of the rubber inner tube is linearly arrayed with multiple corrugated rings, the other side of each corrugated ring is fixedly connected to the inner wall of the first rubber outer tube, a rubber mesh tube is fixedly connected to the inner wall of the rubber inner tube, a buffer tube is fixedly connected to the inner wall of the rubber mesh tube, a first indirect cable is sleeved inside the buffer tube, and a first connector and a second connector are electrically connected to the two ends of the first indirect cable, respectively. The other end of the first connector is electrically connected to an external cable.

[0012] Preferably, the deformation mechanism includes a second indirect cable electrically connected to the other end of the second connector located at the beginning and end, and the first connector and the second connector located in the middle are both electrically connected to the second indirect cable. The outer peripheral surface of the second indirect cable is fitted with a sponge inner tube, and the outer peripheral surface of the sponge inner tube is fixedly connected with a second rubber outer tube. The outer peripheral surface of the second rubber outer tube is provided with a limit buffer component.

[0013] Preferably, the limiting buffer assembly includes a flexible tube sleeved on the outer circumference of the second rubber outer tube, the tube body of the flexible tube is linearly arrayed with multiple sets of flexible rings, each set of the flexible rings having at least three rings, the tube body of the flexible tube is annularly arrayed with multiple flexible rods, and the tube body of the flexible tube located between two adjacent sets of flexible rings is annularly arrayed with multiple buffer columns. The inner sides of each flexible rod and flexible ring are fixedly connected to the outer circumferential surface of the second rubber outer tube, and the outer circumferential surface of the flexible tube is fitted with a corrugated tube.

[0014] The technical solution provided by this invention has the following advantages compared with the known prior art: 1. The fixing mechanism utilizes buffer components, pressure-reducing components, resistance components, contraction components, and clamping angle components to secure the cable when it crosses sea / river bridges and subway tracks. It flexibly absorbs the low-frequency large-amplitude swaying of the cable caused by strong winds or high-frequency mechanical resonance generated by train movement, thereby reducing cable sway amplitude. Specifically, the clamping angle components dynamically clamp the cable at the intersection of the sea / river bridge and subway tracks. The contraction components, through their own expansion and contraction deformation, transmit the high-frequency mechanical resonance caused by strong winds or train movement to the resistance components. The contraction components convert and transfer external vibration energy to the resistance components through their expansion and contraction deformation. Combined with the buffer and pressure-reducing components, this forms a multi-stage damping system that flexibly absorbs and dissipates vibration energy, thereby reducing cable sway amplitude and high-frequency mechanical resonance. This avoids stress concentration and metal fatigue caused by rigid connections, improving the cable's service life and power supply safety in extreme dynamic environments.

[0015] 2. An anti-impact mechanism is used to adapt to the clamping method of the cable in the fixed mechanism. The anti-impact mechanism utilizes multiple layers of flexible protection with different effects, thus having a certain degree of flexibility and vibration reduction to adapt to the angle adjustment of the clamping angle component in the fixed mechanism. At the same time, its flexible characteristics effectively buffer and isolate the direct rigid impact between the cable and the clamping angle component, thereby reducing contact point wear and stress concentration caused by high-frequency vibration, and improving the clamping safety and structural integrity of the cable in complex vibration environment.

[0016] 3. A deformation mechanism is used to achieve corresponding deformation of the cable arranged between two fixed mechanisms. The deformation mechanism utilizes multiple layers of different deformations and buffers to achieve adaptive deformation of the cable distributed in the intersection of cross-sea / cross-river bridges and subway tracks, which is affected by the low-frequency large-amplitude swaying of the bridge caused by strong winds or the high-frequency mechanical resonance caused by train movement. In this process, the violent external dynamic displacement of the cable caused by the low-frequency large-amplitude swaying of the cable caused by strong winds or the high-frequency mechanical resonance caused by train movement is transformed into controllable deformation within the mechanism. In this process, the swaying amplitude and resonance energy are reduced by the multi-layer buffer structure, thereby avoiding mechanical damage to the cable caused by excessive stretching or compression, and improving the operating stability and fatigue life of the cable under extreme dynamic conditions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall side structure of the present invention; Figure 3 This is a schematic diagram of the fixing mechanism of the present invention; Figure 4 This is a schematic diagram of the structure of the buffer component of the present invention; Figure 5 This is a schematic diagram of the pressure-reducing component of the present invention; Figure 6 This is a schematic diagram of the resistance component and elastic tube of the present invention; Figure 7 This is a schematic diagram of the internal structure of the resistance component of the present invention; Figure 8 This is a schematic diagram of the structure of the inertial component of the present invention; Figure 9 This is a schematic diagram of the structure of the shrinkage component of the present invention; Figure 10 This is a schematic diagram of the clamping angle component of the present invention; Figure 11 This is a schematic diagram of the impact-resistant mechanism of the present invention; Figure 12 This is a schematic diagram of the internal structure of the deformation mechanism of the present invention; Figure 13 This is a schematic diagram of the deformation mechanism component of the present invention; Figure 14 This is a schematic diagram of the structure of the limiting buffer component of the present invention.

[0019] Reference numerals: 1. Base; 2. Fixing mechanism; 21. Buffer assembly; 211. Buffer box; 212. Pressure detector; 22. Pressure relief assembly; 221. Slide rail; 222. Airbag; 223. Slide plate; 23. Resistance assembly; 231. Resistance block; 232. Square opening; 233. Setting opening; 234. Force-bearing block; 235. Slider; 24. Honeycomb block; 25. Hollow rod; 26. Inertia assembly; 261. Support rod; 262. Counterweight ball; 263. Conical block; 264. Counterweight block; 27. Retraction assembly; 271. Moving block; 272. Elastic block; 28. Clamping angle assembly; 281. Square frame; 282. 1. Rotating shaft; 283. Mounting block; 284. Fixing block; 285. Second rotating shaft; 286. Multi-section rod; 287. Clamp; 29. ​​Elastic tube; 3. Impact-resistant mechanism; 31. First connector; 32. First rubber outer tube; 33. Rubber inner tube; 34. Corrugated ring; 35. Rubber mesh tube; 36. Buffer tube; 37. First indirect cable; 38. Second connector; 4. Deformation mechanism; 41. Corrugated tube; 42. Limiting buffer assembly; 421. Flexible tube; 422. Flexible ring; 423. Flexible rod; 424. Buffer column; 43. Second rubber outer tube; 44. Sponge inner tube; 45. Second indirect cable; 100. External cable. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] Example: Refer to Figures 1 to 14 A cross-linked polyethylene insulated power cable with shock-resistant function, comprising: Base 1, base 1 has multiple bases; The fixing mechanism 2 corresponds to the number of bases 1. The fixing mechanism 2 includes a buffer assembly 21 disposed on the upper surface of the base 1. Both sides of the buffer assembly 21 are provided with pressure-reducing components 22. A resistance component 23 is disposed between the two pressure-reducing components 22. A contraction component 27 is disposed on the upper surface of the buffer assembly 21. A clamping angle component 28 is disposed on the upper surface of the contraction component 27. The number of impact-resistant mechanisms 3 corresponds to the number of fixing mechanisms 2, and the impact-resistant mechanisms 3 are located inside the clamping angle assembly 28. Deformation mechanism 4, the number of deformation mechanisms 4 is always less than one impact-resistant mechanism 3, and deformation mechanism 4 is located between two adjacent impact-resistant mechanisms 3.

[0023] The clamping angle component 28 in the fixing mechanism 2 is used to clamp the anti-impact mechanism 3 and change the angle of clamping the anti-impact mechanism 3. The clamping angle component 28 achieves the reciprocating sliding of the resistance component 23 inside the buffer component 21 through the contraction component 27, thereby consuming the sway amplitude and high-frequency mechanical resonance transmitted by the anti-impact mechanism 3. The anti-impact mechanism 3 clamped in the clamping angle component 28 uses its multi-layer flexible protection with different effects to adapt to the clamping angle component 28. The deformation mechanism 4 uses its own multi-layer deformation and buffering to achieve adaptive changes in sway amplitude and high-frequency mechanical resonance.

[0024] Reference Figures 1 to 5 The buffer assembly 21 includes a buffer box 211 fixedly connected to the upper end face of the base 1, and pressure detectors 212 are fixedly connected to both sides of the buffer box 211 in the width direction. Two pressure-reducing components 22 are respectively disposed on the inner walls of the two sides of the buffer box 211 along its length. Each pressure-reducing component 22 includes a slide 221 fixedly connected to the middle position of the inner wall of the buffer box 211. Multiple elastic airbags 222 are linearly arranged on the inner walls of both sides of the slide 221 along its length. A sliding plate 223 is fixedly connected to the other side of each elastic airbag 222.

[0025] The resistance component 23 is horizontally reciprocated within the pressure relief component 22 by using two sliding plates 223 in the pressure relief component 22, and the sliding plates 223 are connected to the slide rail 221 by multiple elastic airbags 222.

[0026] Reference Figure 4 , Figures 6 to 7 The resistance component 23 includes a slider 235 that is slidably connected between two slide plates 223. A resistance block 231 is fixedly connected between the two sliders 235. A square opening 232 is provided on both sides of the resistance block 231 in the width direction. A honeycomb block 24 is fixedly connected to the openings at both ends of each square opening 232. A plurality of hollow rods 25 are fixedly connected to the rectangular array inside the square opening 232. The resistance block 231 has a mounting port 233 on both sides of its center position. Each mounting port 233 has a rectangular array of multiple inertial components 26 on its inner top. Each resistance block 231 has a force-bearing block 234 fixedly connected to both sides of its center position. Each force-bearing block 234 has an elastic tube 29 fixedly connected to the other side of its other side. The other side of the elastic tube 29 is fixedly connected to the inner wall of the buffer box 211 in the width direction. The elastic tube 29 is filled with gas. The elastic tube 29 corresponds to the pressure detector 212 and is connected to the pressure detector 212.

[0027] The two sliders 235 in the resistance component 23 support and reciprocate the movement of the resistance block 231 in the buffer box 211. The honeycomb block 24, together with the hollow rod 25, dissipates the energy of the resistance block 231 when it moves in the buffer box 211. The inertial component 26 stabilizes the movement speed of the resistance block 231 in the buffer box 211, and the elastic tube 29 balances the resistance block 231 in the buffer box 211.

[0028] Reference Figures 7 to 8 The inertial component 26 includes a support rod 261 that is slidably connected to the top of the setting port 233. The other end of the support rod 261 is fixedly connected to a counterweight ball 262. The bottom of the counterweight ball 262 is fixedly connected to a conical block 263. The bottom of the conical block 263 is fixedly connected to a counterweight block 264.

[0029] The support rod 261 supports the counterweight ball 262, the conical block 263 and the counterweight block 264, thereby stabilizing the movement of the resistance block 231.

[0030] Reference Figure 3 ,to Figure 9 The shrinkage assembly 27 includes two elastic blocks 272 and a movable block 271 fixedly connected to the upper surface of the buffer box 211. The movable block 271 is located between the two elastic blocks 272. The bottom of the movable block 271 is fixedly connected to the top of the resistance block 231. The buffer box 211, the two elastic blocks 272, and the movable block 271 together form a storage area, which is filled with resistance liquid, and the resistance liquid buries the resistance assembly 23.

[0031] By utilizing the connection between the moving block 271 and the resistance block 231 in the contraction assembly 27, the force transmitted from the clamping angle assembly 28 to the moving block 271 is further transmitted to the resistance block 231.

[0032] Reference Figure 3 , Figure 10 The clamping angle assembly 28 includes a square frame 281 fixedly connected to the top of the moving block 271. The two sides of the square frame 281 in the width direction correspond to the positions of the two elastic blocks 272. The center positions of the inner walls of the two sides of the square frame 281 in the length direction are fixedly connected to the first rotating shaft 282. The shaft end of each first rotating shaft 282 is rolledly connected to the mounting block 283. The two sides of each mounting block 283 facing the two elastic blocks 272 are fixedly connected to the fixing block 284. The other side of the fixing block 284 is linearly arrayed with multiple second rotating shafts 285 in the length direction. The shaft end of each second rotating shaft 285 is rolledly connected to a multi-section rod 286. The other side of the multi-section rod 286 is fixedly connected to the inner wall of the square frame 281. The two mounting blocks 283 are fixedly connected to the clamps 287 on the side away from the first rotating shafts 282.

[0033] The clamp 287 in the clamping angle assembly 28 is used to clamp the anti-impact mechanism 3. The clamp 287 moves in the direction when the anti-impact mechanism 3 swings through the square frame 281 and the first rotating shaft 282. The second rotating shaft 285, together with the multi-section rod 286, buffers the directional movement of the clamp 287.

[0034] Reference Figures 11 to 12 The impact-resistant mechanism 3 includes a first rubber outer tube 32 clamped between two clamps 287. A rubber inner tube 33 is sleeved inside the first rubber outer tube 32, and there is a gap between the first rubber outer tube 32 and the rubber inner tube 33. Multiple corrugated rings 34 are linearly arrayed and fixedly connected to the tube body of the rubber inner tube 33. The other side of each corrugated ring 34 is fixedly connected to the inner wall of the first rubber outer tube 32. A rubber mesh tube 35 is fixedly connected to the inner wall of the rubber mesh tube 35. A buffer tube 36 is fixedly connected to the inner wall of the rubber mesh tube 35. A first indirect cable 37 is sleeved inside the buffer tube 36. The two ends of the first indirect cable 37 are electrically connected to a first connector 31 and a second connector 38, respectively. The other end of the first connector 31 is electrically connected to an external cable 100.

[0035] The multi-layer structure of the buffer tube 36, rubber mesh tube 35 and rubber inner tube 33 in the impact-resistant mechanism 3 enables the first indirect cable 37 to be held in the clamp 287 with a certain degree of flexibility and vibration reduction.

[0036] Reference Figure 11 , Figure 14 The deformation mechanism 4 includes a second indirect cable 45 electrically connected to the other end of the second connector 38 located at the beginning and end, and the first connector 31 and the second connector 38 located in the middle are both electrically connected to the second indirect cable 45. The outer peripheral surface of the second indirect cable 45 is fitted with a sponge inner tube 44, and the outer peripheral surface of the sponge inner tube 44 is fixedly connected with a second rubber outer tube 43. The outer peripheral surface of the second rubber outer tube 43 is provided with a limit buffer component 42.

[0037] The limiting buffer assembly 42 includes a flexible tube 421 sleeved on the outer circumference of the second rubber outer tube 43. The tube body of the flexible tube 421 is linearly arrayed and fixedly connected to multiple sets of flexible rings 422, each set of flexible rings 422 having at least three rings. The tube body of the flexible tube 421 is annularly arrayed and fixedly connected to multiple flexible rods 423. The tube body of the flexible tube 421 located between two adjacent sets of flexible rings 422 is annularly arrayed and fixedly connected to multiple buffer columns 424. The inner sides of each flexible rod 423 and flexible ring 422 are fixedly connected to the outer circumferential surface of the second rubber outer tube 43, and the outer circumferential surface of the flexible tube 421 is fitted with a corrugated tube 41.

[0038] By utilizing the inner sponge tube 44 and the second rubber outer tube 43 in the deformation mechanism 4, adaptive deformation is achieved for cables distributed in the intersection of cross-sea / cross-river bridges and subway tracks, which are subject to low-frequency large-amplitude swaying of the bridge caused by strong winds or high-frequency mechanical resonance generated by train movement. Meanwhile, the limiting buffer component 42 uses flexible tube 421, flexible ring 422 and flexible rod 423, in conjunction with corrugated tube 41, to convert the violent external dynamic displacement into controllable deformation inside the mechanism. In this process, the swaying amplitude and resonance energy are greatly reduced through the multi-layer buffer structure.

[0039] The specific operating principle of this embodiment is as follows: Step 1: First, fix multiple bases 1 evenly at a certain interval, such as 5-8 meters, on the side of the pier of the cross-sea / cross-river bridge, the reserved metal bracket on the bridge deck, or the reinforced concrete side wall load-bearing structure of the subway tunnel. Then, use expansion bolts to rigidly lock the bases 1 to the installation surface to ensure that there is no loosening. Each base 1 has a fixing mechanism 2 on its upper surface, and uses the clamp 287 in the clamping angle adjustment assembly 28 to clamp the impact-resistant mechanism 3 (the clamping force is controlled to prevent the impact-resistant mechanism 3 from falling off, such as leaving about ±5° of activity space).

[0040] Among them, the adjacent impact-resistant mechanisms 3 are electrically connected through the second indirect cable 45 of the deformation mechanism 4. The first connector 31 and the second connector 38 located in the middle are connected to the second indirect cable 45. The two external cables 100 located at the beginning and end are respectively connected to the first connector 31 of the impact-resistant mechanisms 3 at the beginning and end. The distance between the two is set according to the actual span of the cross-sea / cross-river bridge (such as 100-1000 meters) or the tunnel length of the subway rail transit (such as 500-5000 meters), thus forming a transmission path of: "external cable 100 → first connector 31 → first indirect cable 37 → second connector 38 → second indirect cable 45 → second connector 38 → first indirect cable 37 → first connector 31 → external cable 100". Special Note: To adapt to the narrow installation scenarios of cross-sea / cross-river bridges and subway tunnels, and to ensure that the cable can fully cover the power transmission needs of the bridge's cross-river / cross-sea section or the subway tunnel's passage section, avoiding wiring redundancy due to insufficient length, the deformation mechanism 4 (5-8 meters per section, with a total length matching the bridge / tunnel length) is the core load-bearing section of the entire transmission link. It bears most of the vibration energy, reducing the time that the external cable 100 is directly exposed to extreme vibration environments, thus reducing its risk of damage. It also ensures the straightness and stability of the power transmission path, avoiding excessive bending and stretching due to the mismatch between the cable length and the installation scenario, and reducing stress concentration at the joints.

[0041] When a cross-sea / cross-river bridge encounters strong winds that cause low-frequency large-amplitude swaying (e.g., amplitude ±15cm), or when a subway train travels at high speed and generates high-frequency mechanical resonance (e.g., frequency 50-200Hz), since the deformation mechanism 4 is the main transmission channel inside the bridge / tunnel and its length is much longer than the single-segment impact-resistant mechanism 3, the vibration energy is preferentially and mainly acts on the deformation mechanism 4. When vibration energy acts on the deformation mechanism 4, the outermost corrugated pipe 41 of the deformation mechanism 4 receives the vibration impact force through the axial expansion and contraction of the corrugated structure, and the amount of expansion and contraction changes synchronously with the amplitude of shaking; subsequently, the flexible pipe 421 and the flexible rod 423 and flexible ring 422 of the pipe body undergo bending and expansion deformation simultaneously. At this time, the buffer column 424 between two adjacent sets of flexible rings 422 is compressed and contracted (e.g., the maximum compression can reach 30% of its own length); while the inner second rubber outer tube 43 disperses stress through elastic deformation, and the sponge inner tube 44 uses a porous structure to absorb energy and reduce vibration, transforming the violent external dynamic displacement into internal flexible deformation (e.g., reducing vibration energy by 60%-70%).

[0042] Special note: The deformation mechanism 4 consumes less vibration energy. Its core function is to limit the swing amplitude through the controllable deformation of the multi-layer structure, so as to avoid excessive stretching, compression or large swing of the second indirect cable 45 due to vibration, and prevent conductor strand breakage or insulation layer damage. During this process, the second indirect cable 45, as the main transmission conductor, bends and stretches synchronously with the deformation mechanism 4 due to its own flexible properties. Most of the vibration energy that is not consumed is directly transmitted to the adjacent shock-resistant mechanism 3 through the second connectors 38 at both ends, thus realizing the transmission of "vibration-force".

[0043] Step 2: After most of the vibration energy transmitted from the deformation mechanism 4 is applied to the anti-impact mechanism 3, the anti-impact mechanism 3 transmits the vibration energy to the fixing mechanism 2. Its first rubber outer tube 32 first undergoes elastic deformation, and the wave ring 34 between the inner rubber inner tube 33 and the first rubber outer tube 32 then stretches, extends and bends, thereby using the elastic restoring force of the rubber to buffer the vibration. The rubber mesh tube 35 on the inner wall of the inner rubber tube 33 disperses localized stress through the stretching and compression of the mesh structure, and the innermost buffer tube 36 directly wraps around the first indirect cable 37, isolating some vibration and preventing the insulation layer of the first indirect cable 37 from directly bearing the impact.

[0044] Meanwhile, the impact-resistant mechanism 3, with its own flexible characteristics, adapts to the clamping angle adjustment of the clamping angle component 28 in the fixing mechanism 2: when the impact-resistant mechanism 3 is deflected under vibration (e.g., ±3-5° angle), the flexible deformation of its first rubber outer tube 32 is adapted to the clamping surface of the clamp 287, avoiding rigid friction or shear force between the two, ensuring clamping stability. The first indirect cable 37 is attached to the conductive terminals of the first connector 31 and the second connector 38 through the core wire. Power is accurately conducted from the second indirect cable 45 through the second connector 38 to the first indirect cable 37, and then through the first connector 31 to the external cable 100, completing the power connection of the two cables.

[0045] Furthermore, the impact-resistant mechanism 3 generates horizontal reciprocating movement (e.g., displacement ±3-5cm) under vibration. Its first rubber outer tube 32 directly transmits the reciprocating force to the mounting block 283 of the clamping angle component 28 through the friction generated by the clamping surface (contact area ≥80%) of the clamping fixture 287. And through the fixed connection between the moving block 271 and the resistance block 231 (e.g., welding + bolt reinforcement), most of the vibration energy is rigidly transmitted to the resistance block 231 at the same time, realizing the efficient transmission of "vibration-force" from the deformation mechanism 4 to the impact-resistant mechanism 3, and then to the clamping angle component 28 and the resistance block 231.

[0046] Special Note: Instructions for the electrical connection of the two cable sections: The power connection between the two cable segments is achieved in a closed loop: “external cable 100 → first indirect cable 37 → second indirect cable 45 → first indirect cable 37 → external cable 100”. External cable 100 refers to the external power transmission cable outside the cross-sea / cross-river bridge and subway rail transit line. Its core function is to connect the internal transmission link with the external power system, and it does not directly bear the extreme vibrations of the bridge or tunnel. The first indirect cable 37 and the second indirect cable 45 are the core transmission cables located within the cross-sea / cross-river bridge and subway rail transit line. The first indirect cable 37, in conjunction with the multi-layer flexible protection of the impact-resistant mechanism 3, adapts to the clamping angle adjustment and vibration buffering. The second indirect cable 45, through the multi-layer structure of the deformation mechanism 4, bears most of the vibration and limits and controls the amplitude. Together, they form the transmission path within the line, adapting to the vibration environment. This clearly distinguishes them from external cable 100 in terms of usage scenario, load-bearing capacity, and seismic adaptability. At this time, the conductor core of the external cable 100 is fixed to the conductive terminal of the first connector 31 by crimping process. The contact surface is coated with conductive glue to ensure low resistance conduction. Since the power is first transmitted to the first indirect cable 37, the other end of the first indirect cable 37 is crimped to the core of the second indirect cable 45 through the bidirectional conductive terminal of the second connector 38. The outer periphery of the crimping terminal is wrapped with an insulating sealing sleeve to prevent vibration, loosening or moisture. The power is conducted to the second indirect cable 45 through this. Since the second indirect cable 45 is then connected to the first indirect cable 37 of the adjacent anti-impact mechanism 3 through another set of second connectors 38, it is finally transmitted back to the other end of the external cable 100 through the first connector 31. This entire process relies on the rigid conductive connection of the connector and the tight fit of the core wire, combined with the sealing structure and the flexible characteristics of the cable, to achieve a seamless and stable power connection in earthquake-resistant scenarios.

[0047] Step 3: Most of the vibration energy transmitted to the fixing mechanism 2 is then transferred to the clamping angle component 28 by the reciprocating force transmitted by the anti-impact mechanism 3. The mounting block 283 rotates around the first rotating shaft 282 to adapt to the angular displacement caused by the vibration, thus avoiding shearing force between the clamp 287 and the anti-impact mechanism 3. Meanwhile, the fixing blocks 284 on both sides of the mounting block 283 drive the multi-section rod 286 to extend and retract through the second rotating shaft 285. The segments of the multi-section rod 286 are connected by a hinge structure to buffer the speed of reciprocating movement, reduce the force transmission efficiency, and avoid structural damage caused by rigid collisions.

[0048] At the same time, the reciprocating force transmitted to the resistance block 231 drives the resistance block 231 to slide horizontally back and forth on the slide plate 223 of the pressure reducing assembly 22 via the sliders 235 on both sides. The elastic blocks 272 on both sides alternately contract and extend as the moving block 271 moves, providing elastic restoring force.

[0049] Since the storage area formed by the buffer box 211, elastic block 272, and moving block 271 is filled with high-viscosity resistance liquid (such as silicone oil) and completely buries the resistance component 23, when the resistance block 231 slides, the resistance liquid needs to penetrate the honeycomb blocks 24 (such as porous structure with a pore size of 0.5-1mm) at both ends of the square opening 232 and the hollow rods 25 inside (such as with a spacing of 1cm) to achieve the liquid damping effect (such as consuming more than 70% of the vibration energy). Meanwhile, the elastic airbags 222 on both sides of the skateboard 223 contract or expand synchronously with the sliding of the resistance block 231, further buffering the impact force and reducing the sliding speed. At this time, the inertial component 26 in the resistance block 231 drives the counterweight ball 262, cone block 263, and counterweight block 264 to generate inertial force through the support rod 261, stabilizing the sliding speed of the resistance block 231 and avoiding high-frequency resonance amplification. The elastic tubes 29 on both sides of the resistance block 231 extend and retract with the reciprocating movement, and the nitrogen gas filled inside is compressed or stretched, further consuming the remaining energy. The pressure detectors 212 on both sides of the buffer box 211 monitor the air pressure change in the elastic tubes 29 in real time and provide real-time feedback on the vibration intensity.

[0050] Furthermore, one end of the elastic tube 29 is fixed to the force-bearing block 234 of the resistance block 231, and the other end is connected to the inner wall of the buffer box 211. The tube is filled with gas, which not only works with the pressure detector 212 to provide feedback on the vibration intensity, but also generates an elastic reaction force through its own expansion and contraction when the resistance block 231 moves back and forth with the moving block 271, thus playing a buffering role. At the same time, the elastic restoring force of the gas pulls the resistance block 231 back to its original position, thereby driving the moving block 271, which is fixedly connected to the resistance block 231, back to its initial position, ensuring the structural stability of the contraction component 27 and the timeliness of the subsequent vibration response.

[0051] Special Note: 1. The inertial component 26 can stabilize the sliding speed of the resistance block 231 and avoid high-frequency resonance amplification because: the combination of the counterweight ball 262, the conical block 263 and the counterweight block 264 suspended by the support rod 261 forms a large inertial mass, and the support rod 261 and the top of the setting port 233 can be flexibly adapted to the direction of force.

[0052] Based on the law of inertia and the damping effect: when the resistance block 231 is driven by vibration to slide back and forth rapidly, the inertial mass will generate a damping force opposite to the sliding direction due to its own inertia, which will hinder the rapid increase or decrease of speed to maintain uniform sliding. At the same time, the resultant force of its gravity and inertia can suppress the rapid, small-amplitude reciprocating oscillation of the resistance block 231 caused by high-frequency vibration, avoid the vibration energy from being superimposed and amplified on the resistance block 231, and thus prevent the high-frequency resonance from intensifying. Combined with the resistance liquid in the buffer box 211, the speed stability and resonance suppression effect are further improved.

[0053] 2. The angle adjustment of the clamping angle component 28 is achieved through the coordinated operation of the first rotating shaft 282, the second rotating shaft 285, and the multi-section rod 286. When the anti-impact mechanism 3 deviates in angle due to vibration, the clamp 287 holding it will drive the mounting block 283 to rotate flexibly around the first rotating shaft 282 on the inner wall of the square frame 281. Simultaneously, the multi-section rod 286 on the fixing blocks 284 on both sides of the mounting block 283 completes buffering and deceleration. The multi-section rod 286 achieves the hinge connection between segments through the second rotating shaft 285. During angle adjustment, it will adapt to the rotation of the mounting block 283 by extending and retracting and rotating segments. It not only generates a reverse force to resist the adjustment speed through the elastic deformation of the rod itself, but also uses the friction damping between segments to disperse the impact force. At the same time, it limits the adjustment range to avoid excessive deflection, thereby driving the clamp 287 to accurately adapt to the angle change of the anti-impact mechanism 3, ensuring clamping stability and force transmission continuity.

[0054] Through a complete and coordinated link consisting of "deformation mechanism 4 for vibration absorption and amplitude control → impact-resistant mechanism 3 for flexible adaptation and force transmission → fixing mechanism 2 for multi-level energy dissipation," the energy from strong winds on the cross-sea / cross-river bridge and high-frequency resonance of the subway train is weakened layer by layer. Power is transmitted stably along the closed-loop path. Furthermore, the spacing between the two external cables 100 is specially set according to the bridge span or subway tunnel length, ensuring that power transmission covers the entire journey. The first indirect cable 37 and the second indirect cable 45 maintain stable power transmission during the earthquake resistance process through the rigid connection of the connectors and their own flexible characteristics, without any power outages or voltage fluctuations. At the same time, the shear force and fatigue stress inside the cables are effectively reduced, preventing the insulation layer of the first indirect cable 37 and the second indirect cable 45 from cracking and the conductor strands from breaking, avoiding the loosening of each connector, ensuring the connection stability of the main transmission channel, and achieving continuous and safe power supply under extreme vibration environments.

[0055] Special Note: The reason for the shaking of the deformation mechanism 4: low-frequency large-amplitude shaking caused by strong winds on the cross-sea / cross-river bridge or high-frequency mechanical resonance generated by the subway train. As the main connecting structure between the adjacent anti-impact mechanisms 3 and with a longer length, it preferentially bears most of the vibration energy. Because the vibration is adapted by the controllable deformation of the multi-layer structure such as the corrugated pipe 41 and the flexible pipe 421, the shaking is generated. This shaking is transmitted to the anti-impact mechanism 3 through the second connector 38. The reciprocating movement and angular offset of the anti-impact mechanism 3 are transmitted to the square frame 281 of the clamping angle component 28 through the clamp 287. The square frame 281 drives the bottom fixed shrinking component 27 moving block 271 to reciprocate and squeeze the elastic blocks 272 on both sides. The moving block 271 and the resistance block 231 are rigidly fixed, and the resistance block 231 is slidably connected to the slide plate 223 in the buffer box 211 through the slider 235. Therefore, the reciprocating movement of the moving block 271 will synchronously drive the resistance block 231 to reciprocate and slide in the buffer box 211, realizing the transmission and subsequent consumption of vibration energy.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cross-linked polyethylene insulated power cable with shock-resistant function, characterized in that, include: Base (1), said base (1) having multiple bases; The fixing mechanism (2) corresponds to the number of bases (1). The fixing mechanism (2) includes a buffer assembly (21) disposed on the upper surface of the base (1). Both sides of the buffer assembly (21) are provided with pressure-reducing assemblies (22). A resistance assembly (23) is disposed between the two pressure-reducing assemblies (22). A shrinkage assembly (27) is disposed on the upper surface of the buffer assembly (21). A clamping angle assembly (28) is disposed on the upper surface of the shrinkage assembly (27). An anti-impact mechanism (3) is provided, the number of which corresponds to the number of fixing mechanisms (2), and the anti-impact mechanism (3) is provided inside the clamping angle assembly (28); Deformation mechanism (4), the number of which is always less than one of the impact-resistant mechanism (3), and the deformation mechanism (4) is located between two adjacent impact-resistant mechanisms (3).

2. A cross-linked polyethylene insulated power cable with shock-resistant function according to claim 1, characterized in that, The buffer assembly (21) includes a buffer box (211) fixedly connected to the upper end face of the base (1), and pressure detectors (212) are fixedly connected to both sides of the buffer box (211) in the width direction. The two pressure-reducing components (22) are respectively disposed on the inner walls of the two sides of the buffer box (211) along the length direction. Each pressure-reducing component (22) includes a slide (221) fixedly connected to the middle position of the inner wall of the buffer box (211). Multiple elastic airbags (222) are linearly arranged on the inner walls of the two sides along the length direction of the slide (221). A sliding plate (223) is fixedly connected to the other side of each elastic airbag (222).

3. A cross-linked polyethylene insulated power cable with shock-resistant function according to claim 2, characterized in that, The resistance component (23) includes a slider (235) slidably connected between two slide plates (223), and a resistance block (231) is fixedly connected between the two sliders (235). The resistance block (231) has square openings (232) on both sides in the width direction. A honeycomb block (24) is fixedly connected to the openings at both ends of each square opening (232). A plurality of hollow rods (25) are fixedly connected to the rectangular array inside the square opening (232). The resistance block (231) has a setting port (233) on both sides of the center position. Each setting port (233) has a rectangular array of multiple inertial components (26) on its inner top. Each resistance block (231) has a force block (234) fixedly connected to both sides of the center position. Each force block (234) has an elastic tube (29) fixedly connected to the other side. The other side of the elastic tube (29) is fixedly connected to the inner wall of the buffer box (211) in the width direction. The elastic tube (29) is filled with gas. The elastic tube (29) corresponds to the pressure detector (212) and is connected to the pressure detector (212).

4. A cross-linked polyethylene insulated power cable with shock-resistant function according to claim 3, characterized in that, The inertial component (26) includes a support rod (261) slidably connected to the top of the setting port (233), a counterweight ball (262) fixedly connected to the other end of the support rod (261), a conical block (263) fixedly connected to the bottom of the counterweight ball (262), and a counterweight block (264) fixedly connected to the bottom of the conical block (263).

5. A cross-linked polyethylene insulated power cable with shock-resistant function according to claim 1, characterized in that, The shrinking component (27) includes two elastic blocks (272) and a moving block (271) fixedly connected to the upper surface of the buffer box (211). The moving block (271) is located between the two elastic blocks (272). The bottom of the moving block (271) is fixedly connected to the top of the resistance block (231). The buffer box (211), the two elastic blocks (272), and the moving block (271) together form a storage area, which is filled with resistance liquid, and the resistance liquid buries the resistance component (23).

6. A cross-linked polyethylene insulated power cable with shock-resistant function according to claim 5, characterized in that, The clamping angle assembly (28) includes a square frame (281) fixedly connected to the top of the moving block (271). The two sides of the square frame (281) in the width direction correspond to the positions of two elastic blocks (272). The center positions of the inner walls of the two sides of the square frame (281) in the length direction are fixedly connected to a first rotating shaft (282). The shaft end of each first rotating shaft (282) is rolledly connected to a mounting block (283). The two sides of each mounting block (283) facing the two elastic blocks (272) are fixedly connected to a fixing block (284). The other side of the fixing block (284) in the length direction is linearly arrayed with multiple second rotating shafts (285). The shaft end of each second rotating shaft (285) is rolledly connected to a multi-section rod (286). The other side of the multi-section rod (286) is fixedly connected to the inner wall of the square frame (281). The two mounting blocks (283) on the side away from the first rotating shaft (282) are fixedly connected to a clamp (287).

7. A cross-linked polyethylene insulated power cable with shock-resistant function according to claim 1, characterized in that, The impact-resistant mechanism (3) includes a first rubber outer tube (32) clamped between two clamps (287). A rubber inner tube (33) is sleeved inside the first rubber outer tube (32), and there is a gap between the first rubber outer tube (32) and the rubber inner tube (33). A plurality of wave rings (34) are fixedly connected to the tube body of the rubber inner tube (33) in a linear array. The other side of each wave ring (34) is fixedly connected to the inner wall of the first rubber outer tube (32). A rubber mesh tube (35) is fixedly connected to the inner wall of the rubber mesh tube (35). A buffer tube (36) is fixedly connected to the inner wall of the rubber mesh tube (35). A first indirect cable (37) is sleeved inside the buffer tube (36). A first connector (31) and a second connector (38) are electrically connected to the two ends of the first indirect cable (37), respectively. The other end of the first connector (31) is electrically connected to an external cable (100).

8. A cross-linked polyethylene insulated power cable with shock-resistant function according to claim 1, characterized in that, The deformation mechanism (4) includes a second indirect cable (45) electrically connected to the other end of the second connector (38) located at the beginning and end, and the first connector (31) and the second connector (38) located in the middle are both electrically connected to the second indirect cable (45). The outer peripheral surface of the second indirect cable (45) is fitted with a sponge inner tube (44), and the outer peripheral surface of the sponge inner tube (44) is fixedly connected with a second rubber outer tube (43). The outer peripheral surface of the second rubber outer tube (43) is provided with a limit buffer assembly (42).

9. A cross-linked polyethylene insulated power cable with shock-resistant function according to claim 8, characterized in that, The limiting buffer assembly (42) includes a flexible tube (421) sleeved on the outer circumference of the second rubber outer tube (43). The tube body of the flexible tube (421) is linearly arrayed with multiple sets of flexible rings (422), each set of flexible rings (422) having at least three rings. The tube body of the flexible tube (421) is annularly arrayed with multiple flexible rods (423). The tube body of the flexible tube (421) located between two adjacent sets of flexible rings (422) is annularly arrayed with multiple buffer columns (424). The inner sides of each of the flexible rods (423) and flexible rings (422) are fixedly connected to the outer circumferential surface of the second rubber outer tube (43), and the outer circumferential surface of the flexible tube (421) is fitted with a corrugated tube (41).

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