Cable with lightning protection

Abstract

The application relates to the technical field of cable lightning protection, in particular to a cable with a lightning protection device, which comprises a cable, mounting plates arranged at the upper and lower ends of the cable, two mounting plates fixedly connected with each other, cooling mechanisms capable of cooling the cable fixedly connected with the opposite ends of the two mounting plates, the cooling mechanisms capable of cooling the cable, conductive blocks fixedly connected with the opposite ends of the two mounting plates, trigger mechanisms fixedly connected with the left and right ends of the conductive blocks and the upper end of the cable, two installation machine housings fixedly connected with the opposite ends of the two mounting plates, the outer walls of each installation machine housing fixedly connected with the adjacent conductive block, each trigger mechanism located in the adjacent installation machine housing, limiting mechanisms capable of limiting and fixing the outer wall of the cable fixedly connected with the outer wall of each installation machine housing, a lightning rod fixedly connected with the upper end of the conductive block located above the cable, and a conductive wire fixedly connected with the bottom of the conductive block located below the cable.

Description

Technical Field

[0001] This invention relates to the field of cable lightning protection technology, specifically to a cable with a lightning protection device. Background Technology

[0002] In modern society, cables play an indispensable role in both power transmission and communication signal transmission, and are widely distributed in every corner of the city and remote areas. However, outdoor cables are often threatened by lightning strikes. The powerful current and instantaneous high temperature generated by lightning strikes can cause serious damage to cables.

[0003] While traditional lightning protection methods can provide some protection, they cannot completely prevent the damage caused by lightning strikes. During a lightning strike, the enormous energy can cause a rapid increase in the local temperature of the cable, leading to softening or even melting of the cable insulation material. Once the cable softens, the softened portion is easily deformed under the influence of gravity and external tension, affecting the internal conductor structure and performance of the cable, reducing transmission efficiency, and even causing short-circuit faults. This seriously affects power supply and communication quality. Moreover, if softened cables are not dealt with in a timely manner, they may also cause safety hazards such as fires.

[0004] Currently, there is a lack of devices on the market that can effectively protect and treat cables after they have been softened by lightning strikes. Existing technologies cannot effectively fix the unsoftened parts of the cable when it is softened, nor can they cool down the high-temperature softened cable in time. Therefore, it is urgent to develop a lightning protection device that can fix the unsoftened cable when it is softened by lightning strikes to prevent the softened parts from being stretched and deformed, and also cool down the high-temperature softened cable.

[0005] A search revealed prior art publication number CN115603179A, which discloses a cable lightning protection device. This device features a circularly arranged metal conductive plate with a cavity for housing the cable. An insulating component is located within the cavity and fixedly connected to the metal conductive plate. The insulating component serves to insulate the metal conductive plate from the cable when it is installed on the cable. In this way, during a lightning strike, the metal conductive plate absorbs the lightning strike instead of the cable, preventing cable damage.

[0006] Therefore, based on the above search and combined with existing methods, the above solutions only provide lightning protection for cables and cannot effectively cool down cables that have been softened by lightning strikes or prevent deformation of softened cables. To address this, we propose a cable with a lightning protection device. Summary of the Invention

[0007] The purpose of this invention is to provide a cable with a lightning protection device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A cable with a lightning protection device includes a cable, with mounting plates at both the upper and lower ends of the cable. The two mounting plates are fixedly connected to each other. A cooling mechanism for cooling the cable is fixedly connected to one end of each of the two mounting plates. Both cooling mechanisms can cool the cable. A conductive block is fixedly connected to one end of each mounting plate. A triggering mechanism is fixedly connected to both ends of the conductive block. The triggering mechanism is also fixedly connected to the upper end of the cable. Two mounting housings are also fixedly connected to the opposite ends of the two mounting plates.

[0010] Each of the aforementioned mounting housings is fixedly connected to an adjacent conductive block on its outer wall. Each of the aforementioned triggering mechanisms is located inside an adjacent mounting housing. Each of the aforementioned mounting housings is also fixedly connected to a limiting mechanism that can limit and fix the outer wall of the cable. A lightning rod is fixedly connected to the upper end of the conductive block located above the cable, and a conductive wire is fixedly connected to the bottom of the conductive block located below the cable.

[0011] As a further aspect of this solution, the triggering mechanism includes a second connecting shell, which is fixedly connected to the outer wall of an adjacent conductive block. A first connecting curved plate is fixedly connected to the end of the second connecting shell away from the conductive block. The bottom of the first connecting curved plate is fixedly connected to the upper end of the mounting plate. A first piston plate is slidably connected between the bottom of the second connecting shell and the mounting plate.

[0012] As a further part of this solution, the space between the second connecting shell, the first piston plate and the conductive block is filled with expanding oil. The conductive block is also provided with several communication ports. The first piston plate and the conductive block are fixedly connected by several first springs. A second connecting curved plate is provided on the side of the first connecting curved plate away from the conductive block. A first connecting shell is fixedly connected between the second connecting curved plate and the first connecting curved plate. A second piston plate is slidably connected between the bottom of the first connecting shell and the upper end of the mounting plate. Coolant is filled between the first connecting shell, the second connecting curved plate and the second piston plate.

[0013] As a further aspect of this solution, each second piston plate is fixedly connected to the adjacent first piston plate via two second connecting arms. The outer wall of the second connecting arm passes through the interior of the first connecting curved plate. Two first water inlets are opened inside the second piston plate. Each first water inlet is fixedly connected to the first connecting curved plate via a folded tube. A first blocking plate is provided on the side of each first water inlet near the first connecting curved plate. The first blocking plate is fixedly connected to the adjacent first water inlet via several first elastic telescopic rods. The first blocking plate abuts against the inner wall of the first water inlet.

[0014] As a further aspect of this solution, a second water inlet is provided inside the first blocking plate, and a second blocking plate is provided at the end of the second water inlet near the first water inlet. The second blocking plate and the inner wall of the second water inlet are fixedly connected by a second elastic telescopic rod. The outer wall of the second blocking plate abuts against the inner wall of the second water inlet. A first connecting arm is fixedly connected at the end of the second piston plate away from the first connecting curved plate, and the first connecting arm is fixedly connected to the folded pipe through a pipe. The outer wall of the first connecting arm slides through the inside of the second connecting curved plate.

[0015] As a further aspect of this solution, the limiting mechanism includes a movable box, the bottom of which abuts against the outer wall of the cable, and the movable box is rotatably connected to the mounting housing via two folding arms. The movable box is also fixedly connected to the first connecting arm.

[0016] As a further aspect of this solution, a third piston plate with a reset function is slidably connected to the inner wall of the movable box, and several abutment strips are fixedly connected to the left end of the third piston plate.

[0017] As a further aspect of this solution, each of the abutting bars is provided with two retractable arms on the side away from the third piston plate. The retractable arms are fixedly connected to the bottom of the movable box, and an abutting rod is fixedly connected to the bottom of the inner wall of the retractable arm. An abutting curved block is fixedly connected to the bottom of the retractable arm.

[0018] As a further aspect of this solution, the cooling mechanism includes a cooling bending box, which is fixedly connected to the bottom of the mounting plate. The bottom of the cooling bending box abuts against the outer wall of the cable, and the cooling bending box and the movable box are fixedly connected through a pipe.

[0019] As a further aspect of this solution, a fourth piston plate is slidably connected to the inner wall of the cooling curved box, and several air ports are opened at the right end of the cooling curved box.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. All the abutting arc blocks can fit tightly against the outer wall of the cable to fix and limit the cable. When lightning strikes and the cable softens, the distance between the moving boxes at the left and right ends of the conductive block will be longer than before. In this way, the longer cable can be abutted and fixed, effectively avoiding the cable in the softened part from being pulled by the unsoftened ends of the cable, preventing the cable from deforming due to uneven stress, and ensuring the integrity of the cable structure.

[0022] 2. The coolant filled in the cooling bend box has high thermal conductivity. When the cable temperature rises sharply due to lightning strikes or other reasons, the coolant can quickly absorb the heat emitted by the cable. This rapid heat exchange mechanism can effectively reduce the cable temperature, prevent the cable from being damaged by continuous high temperature, and avoid problems such as insulation layer damage and internal structure deformation, thus extending the cable's service life and ensuring the stability and reliability of power transmission or signal transmission. Attached Figure Description

[0023] Figure 1 A front view of a cable with lightning protection device;

[0024] Figure 2 This is a disassembled diagram of a cable with a lightning protection device.

[0025] Figure 3 A schematic diagram of the internal structure of the first connecting shell of a cable with a lightning protection device;

[0026] Figure 4 A schematic diagram showing the position of the first piston plate in a cable with a lightning protection device;

[0027] Figure 5 A schematic diagram of the internal structure of the first water inlet of a cable with a lightning protection device;

[0028] Figure 6 This is a schematic diagram of the internal structure of the second water inlet of a cable with a lightning protection device.

[0029] Figure 7 This is a schematic diagram of the cooling bend box structure for a cable with a lightning protection device.

[0030] Figure 8 This is a schematic diagram of the internal structure of a mobile box for a cable with a lightning protection device.

[0031] Figure 9 A schematic diagram of the internal structure of a retractable arm of a cable with a lightning protection device;

[0032] Figure 10 This is a schematic diagram of the internal structure of a cooling bend box for a cable with a lightning protection device.

[0033] In the diagram: 1. Cable; 2. Mounting plate; 3. Mounting housing; 4. Lightning rod; 5. Conductive wire; 6. Conductive block; 7. Connecting port; 8. First piston plate; 9. First connecting bend plate; 10. Second piston plate; 11. Cooling bend box; 12. First connecting arm; 13. First connecting shell; 14. Second connecting shell; 15. Folding arm; 16. Moving box;

[0034] 17. Second connecting curved plate; 18. Second connecting arm; 19. First spring; 20. Folding tube; 21. First water inlet; 22. First elastic telescopic rod; 23. First blocking plate; 24. Second blocking plate; 25. Second water inlet; 26. Second elastic telescopic rod; 27. Abutting curved block;

[0035] 28. Abutting bar; 29. ​​Inclined wall; 30. Abutting wheel; 31. Second spring; 32. Third piston plate; 33. Abutting rod; 34. Retracting arm; 35. Third spring; 36. Air port; 37. Fourth piston plate; 38. Slide rod; 101. Triggering mechanism; 201. Limiting mechanism; 301. Cooling mechanism. Detailed Implementation

[0036] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figure 1 - Figure 4 As shown, a cable with a lightning protection device includes a cable 1. Mounting plates 2 are provided at both the upper and lower ends of the cable 1. The two mounting plates 2 are fixedly connected to each other by bolts. A cooling mechanism 301 for cooling the cable 1 is fixedly connected to one end of each mounting plate 2. Each cooling mechanism 301 can cool the cable 1. A conductive block 6 is fixedly connected to one end of each mounting plate 2. The conductive block 6 is made of copper, which has good corrosion resistance and high temperature resistance. A triggering mechanism 101 is fixedly connected to both ends of the conductive block 6, and the triggering mechanism 101 is also fixedly connected to the upper end of the cable 1. Two mounting housings 3 are also fixedly connected to one end of each mounting plate 2.

[0038] Each mounting housing 3 is fixedly connected to the outer wall of an adjacent conductive block 6. Each triggering mechanism 101 is located inside an adjacent mounting housing 3. Each mounting housing 3 is also fixedly connected to a limiting mechanism 201 that can limit and fix the outer wall of the cable. A lightning rod 4 is fixedly connected to the upper end of the conductive block 6 located above the cable 1. A conductive wire 5 is fixedly connected to the bottom of the conductive block 6 located below the cable 1. The conductive wire 5 and the lightning rod 4 are existing technologies and will not be described in detail here.

[0039] Example 2: Please refer to Figure 3 - Figure 6As shown, the triggering mechanism 101 includes a second connecting shell 14, which is fixedly connected to the outer wall of an adjacent conductive block 6. A first connecting curved plate 9 is fixedly connected to the end of the second connecting shell 14 away from the conductive block 6. The bottom of the first connecting curved plate 9 is fixedly connected to the upper end of the mounting plate 2. A first piston plate 8 is slidably connected between the bottom of the second connecting shell 14 and the mounting plate 2. A cavity is formed inside the first connecting curved plate 9, and several holes are formed at both the right and upper ends of the first connecting curved plate 9. Each hole communicates with the cavity. When the first piston plate 8 moves towards the first connecting curved plate 9, the first piston plate 8 pushes the air between the second connecting shell 14 and the first connecting curved plate 9 through the holes at the right end of the first connecting curved plate 9 into the cavity inside the first connecting curved plate 9. The gas inside the cavity is discharged through the holes at the upper end of the first connecting curved plate 9, effectively preventing the first piston plate 8 from becoming blocked. Please refer to [reference needed]. Figure 5 As shown, the space between the second connecting shell 14, the first piston plate 8, and the conductive block 6 is filled with expanding oil. When the conductive block 6 is struck by lightning, the lightning will pass through the conductive block 6 and the expanding oil. At this time, the temperature rises, which intensifies the thermal motion of the oil molecules and increases the intermolecular distance, thus causing the oil volume to expand. After the lightning strike, the temperature gradually decreases, the thermal motion of the expanding oil molecules slows down, the intermolecular distance is restored, and the volume of the oil also returns to its original state. The conductive block 6 also has several connecting ports 7 inside, which can connect the expanding oil at the left and right ends of the conductive block 6. The first piston plate 8 and the conductive block 6 are fixedly connected by several first springs 19. The first springs 19 can drive the first piston plate 8 to quickly reset.

[0040] A second connecting arc plate 17 is provided on the side of the first connecting arc plate 9 away from the conductive block 6. A first connecting shell 13 is fixedly connected between the second connecting arc plate 17 and the first connecting arc plate 9. A second piston plate 10 is slidably connected between the bottom of the first connecting shell 13 and the upper end of the mounting plate 2. Coolant is filled between the first connecting shell 13, the second connecting arc plate 17, and the second piston plate 10. Each second piston plate 10 is fixedly connected to the adjacent first piston plate 8 through two second connecting arms 18. The outer wall of the second connecting arms 18 passes through the interior of the first connecting arc plate 9. The two second connecting arms 18 are symmetrically distributed between the second piston plate 10 and the first piston plate 8. The piston plate 10 has two first water inlets 21 inside. The two first water inlets 21 are symmetrically distributed in front and behind inside the second piston plate 10. Each first water inlet 21 is fixedly connected to the first connecting curved plate 9 through a folded tube 20. Each first water inlet 21 is provided with a first blocking plate 23 on the side near the first connecting curved plate 9. The first blocking plate 23 is located inside the adjacent folded tube 20, and the first blocking plate 23 is fixedly connected to the adjacent first water inlet 21 through a number of first elastic telescopic rods 22. The number of first elastic telescopic rods 22 are circumferentially distributed between the first water inlet 21 and the first blocking plate 23. The first blocking plate 23 abuts against the inner wall of the first water inlet 21.

[0041] The first blocking plate 23 has a second water inlet 25 inside, and a second blocking plate 24 is provided at the end of the second water inlet 25 near the first water inlet 21. The second blocking plate 24 and the inner wall of the second water inlet 25 are fixedly connected by a second elastic telescopic rod 26. The outer wall of the second blocking plate 24 abuts against the inner wall of the second water inlet 25. The end of the second piston plate 10 away from the first connecting curved plate 9 is fixedly connected to a first connecting arm 12. The first connecting arm 12 and the folded tube 20 are fixedly connected by a pipe. The outer wall of the first connecting arm 12 slides through the inside of the second connecting curved plate 17.

[0042] Please see Figure 2 , Figure 7 - Figure 9As shown, the limiting mechanism 201 includes a movable box 16. The bottom of the movable box 16 abuts against the outer wall of the cable 1. The movable box 16 is rotatably connected to the mounting housing 3 through two folding arms 15. The two folding arms 15 are symmetrically distributed between the movable box 16 and the mounting housing 3. The movable box 16 is fixedly connected to the first connecting arm 12. The inner wall of the movable box 16 is slidably connected to a third piston plate 32 with a reset function. The third piston plate 32 is fixedly connected to the inner wall of the movable box 16 through several second springs 31. The second springs 31 are made of stainless steel. Stainless steel has good corrosion resistance and high temperature resistance. In terms of durability, the left end of the third piston plate 32 is fixedly connected to several abutment strips 28. Each abutment strip 28 has a weight reduction hole inside. The end of the abutment strip 28 away from the third piston plate 32 is provided with an inclined wall 29. The inclined wall 29 is at an inclined angle.

[0043] Two retractable arms 34 are provided on the side of each abutment bar 28 away from the third piston plate 32. The retractable arms 34 are fixedly connected to the bottom of the movable box 16. An abutment rod 33 is fixedly connected to the bottom of the inner wall of the retractable arm 34. A third spring 35 is fixedly connected to the inner wall of the retractable arm 34 and is sleeved on the outer wall of the abutment rod 33. The third spring 35 can drive the retractable arm 34 to quickly reset. An abutment wheel 30 is also rotatably connected to the upper end of the abutment rod 33 through a rotating shaft. When the abutment bar 28 abuts against the abutment rod 33, the inclined wall 29 will first abut against the outer wall of the abutment wheel 30. The inclined wall 29 and the abutment wheel 30 will effectively reduce the friction between the abutment rod 33 and the abutment bar 28, thereby extending the service life of the abutment rod 33 and the abutment bar 28. An abutment bend block 27 is fixedly connected to the bottom of the retractable arm 34. The bottom of the abutment bend block 27 is curved. The curved shape can better fit and abut against the outer wall of the cable 1.

[0044] Please see Figure 7 , Figure 10 As shown, the cooling mechanism 301 includes a cooling bending box 11, which is fixedly connected to the bottom of the mounting plate 2. The bottom of the cooling bending box 11 abuts against the outer wall of the cable 1. The cooling bending box 11 and the movable box 16 are fixedly connected through a pipe. A fourth piston plate 37 is also slidably connected to the inner wall of the cooling bending box 11.

[0045] Specifically, two sliding rods 38 are fixedly connected to the inner wall of the cooling bending box 11. The two sliding rods 38 are symmetrically distributed in the inner wall of the cooling bending box 11. Two sliding ports are also opened inside the fourth piston plate 37. The inner wall of each sliding port abuts against the outer wall of the adjacent sliding rod 38. The inner wall of the sliding port and the outer wall of the sliding rod 38 are coated with lubricating oil. When the fourth piston plate 37 moves on the outer wall of the sliding rod 38 through the sliding port, the sliding rod 38 can limit the movement of the fourth piston plate 37 through the sliding port and also guide it, thereby improving the stability of the fourth piston plate 37 when it moves. The lubricating oil can also reduce the friction between the sliding rod 38 and the sliding port and extend the service life of the sliding rod 38 and the sliding port. Several air ports 36 are opened at the right end of the cooling bending box 11.

[0046] Please see Figure 2 , Figure 3 As shown, the mounting plate 2, the second connecting shell 14, the first connecting shell 13, the first piston plate 8, the mounting housing 3, and the folding arm 15 are all made of ceramic material. Ceramic is an inorganic non-metallic material with high hardness. At the same time, ceramic material is also a good insulator and can effectively prevent lightning strikes.

[0047] The working principle of this invention is:

[0048] In use, the bottom of the conductive wire 5 needs to be in contact with the ground. When the lightning rod 4 is struck by lightning, it guides the lightning to the conductive block 6, and then from the conductive block 6 to the conductive wire 5. At this time, the conductive wire 5 conducts the electricity to the ground. At the moment of the lightning strike, the conductive block 6 will instantly generate high temperature. At this time, the cable 1 located inside the conductive block 6 will soften due to the high temperature. The two ends of the cable 1 that are not exposed to high temperature will pull on the softened section of the cable 1, causing the tension to increase and thus causing the cable 1 to deform. To prevent the cable 1 from deforming, when the conductive block 6 is at high temperature, it will transfer heat to the expanding oil. The expansion oil expands and will exert pressure on the first piston plate 8 towards the first connecting curved plate 9. As the first connecting bend plate 9 is pushed, it pushes the second piston plate 10 through the second connecting arm 18. When the second piston plate 10 moves, it squeezes the coolant, which pushes open the first block plate 23 inside the first water inlet 21. The coolant then enters the folded tube 20, and then enters the first connecting arm 12. The coolant then enters the moving box 16 from the first connecting arm 12, and then enters the cooling bend box 11 from the moving box 16. At this time, the fourth piston plate 37 squeezes and moves. When the fourth piston plate 37 moves to the left end of the inner wall of the cooling bend box 11, the inside of the cooling bend box 11 is full of coolant, which will have a cooling effect on the cable 1.

[0049] When the second piston plate 10 moves, the moving box 16 will also move through the first connecting arm 12. When the moving box 16 moves, it will drive the folding arm 15 to bend. At this time, the moving box 16 can move to a distance further away from the mounting housing 3.

[0050] When the fourth piston plate 37 cannot move, the coolant inside the moving box 16 will push the third piston plate 32 open, causing the third piston plate 32 to move to the left. When the third piston plate 32 moves the abutment strip 28, the abutment strip 28 will squeeze the abutment rod 33. The abutment rod 33 will drive the retractable arm 34 to extend. The retractable arm 34 will drive the abutment bend block 27 to abut against the outer wall of the cable 1. All abutment bend blocks 27 can fit tightly against the outer wall of the cable 1 to achieve the fixed limit of the cable 1. When the lightning strike causes the cable 1 to soften, the distance between the left and right ends of the moving box 16 of the conductive block 6 will become longer than before. In this way, the longer cable can be abutted and fixed, effectively avoiding the cable 1 in the softened part from being subjected to the tension of the unsoftened ends of the cable 1, preventing the cable 1 from deforming due to uneven force, and ensuring the integrity of the cable 1 structure.

[0051] When the expansion oil cools, it will cause the first piston plate 8 to reset, which will indirectly cause the second piston plate 10 to reset. When the second piston plate 10 resets, it will perform a suction action in the space between the first connecting shell 13 and the second connecting curved plate 17. At this time, the second blocking plate 24 will disengage from the inner wall of the second water inlet 25, and the coolant will enter the space between the second piston plate 10, the first connecting shell 13, and the second connecting curved plate 17 through the second water inlet 25. Since the diameter of the second water inlet 25 is smaller than that of the first water inlet 21, the reset speed of the second piston plate 10 is limited, allowing the abutment strip 28 to abut against the outer wall of the abutment rod 33 for a longer time. This prevents the abutment bend block 27 from disengaging from the outer wall of the cable 1 before the cable has cooled down. When the expansion oil has completely cooled down, the second piston plate 10 and the first piston plate 8 are fully reset. At this time, the abutment bend block 27 will disengage from the outer wall of the cable 1, and the first connecting arm 12 will drive the moving box 16 to fully reset.

[0052] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cable with lightning protection comprising a cable, characterized in that: The cable is provided with mounting plates at the upper and lower ends, the two mounting plates are fixedly connected with each other, the opposite ends of the two mounting plates are fixedly connected with cooling mechanisms for cooling the cable, each cooling mechanism can cool the cable, the opposite ends of the two mounting plates are fixedly connected with conductive blocks, the left and right ends of each conductive block are fixedly connected with trigger mechanisms, the trigger mechanisms are also fixedly connected to the upper end of the cable, and the opposite ends of the two mounting plates are also fixedly connected with two mounting housings. The outer walls of each mounting housing are fixedly connected with adjacent conductive blocks, each trigger mechanism is located inside the adjacent mounting housing, the outer wall of each mounting housing is also fixedly connected with a limiting mechanism for limiting and fixing the outer wall of the cable, the upper end of the conductive block above the cable is fixedly connected with a lightning rod, and the bottom of the conductive block below the cable is fixedly connected with a conductive wire, a cavity is formed in the first connecting curved plate (9), and a plurality of holes are formed in the right end and the upper end of the first connecting curved plate (9), and each hole is in communication with the cavity. The trigger mechanism comprises a second connecting shell, the second connecting shell is fixedly connected to the outer wall of the adjacent conductive block, the opposite end of the second connecting shell is fixedly connected with a first connecting curved plate, the bottom of the first connecting curved plate is fixedly connected with the upper end of the mounting plate, and the bottom of the second connecting shell is slidably connected with the mounting plate. Expansion oil is filled between the second connecting shell, the first piston plate and the conductive block, a plurality of communication openings are formed in the conductive block, the first piston plate is fixedly connected with the conductive block through a plurality of first springs, the side, away from the conductive block, of the first connecting curved plate is provided with a second connecting curved plate, the first connecting shell is fixedly connected between the second connecting curved plate and the first connecting curved plate, the second piston plate is slidably connected between the bottom of the first connecting shell and the upper end of the mounting plate, and cooling liquid is filled between the second connecting curved plate of the first connecting shell and the second piston plate.

2. A cable with lightning protection according to claim 1, characterized in that: Each second piston plate is fixedly connected with the adjacent first piston plate through two second connecting arms, the outer wall of the second connecting arm penetrates into the first connecting curved plate, two first water permeation openings are formed in the second piston plate, each first water permeation opening is fixedly connected with the first connecting curved plate through a folding pipe, each first water permeation opening is provided with a first blocking plate on the side close to the first connecting curved plate, the first blocking plate and the adjacent first water permeation opening are fixedly connected through a plurality of first elastic expansion rods, and the first blocking plate abuts against the inner wall of the first water permeation opening.

3. A cable with lightning protection according to claim 2, characterized in that: A second water permeation opening is formed in the first blocking plate, a second blocking plate is arranged on the end of the second water permeation opening close to the first water permeation opening, the second blocking plate and the inner wall of the second water permeation opening are fixedly connected through a second elastic expansion rod, the outer wall of the second blocking plate abuts against the inner wall of the second water permeation opening, a first connecting arm is fixedly connected to the end, away from the first connecting curved plate, of the second piston plate, the first connecting arm is fixedly connected with the folding pipe through a pipeline, and the outer wall of the first connecting arm slidably penetrates into the second connecting curved plate.

4. The cable with lightning protection device according to claim 1, characterized in that: The limiting mechanism comprises a moving box, the bottom of the moving box abuts against the outer wall of the cable, the moving box is rotationally connected with the mounting shell through two folding arms, and the moving box is fixedly connected with the first connecting arm.

5. A cable with lightning protection according to claim 4, characterized in that: The inner wall of the moving box is slidably connected with a third piston plate with a reset function, and a plurality of abutting strips are fixedly connected to the left end of the third piston plate.

6. A cable with lightning protection according to claim 5, characterized in that: Two contraction arms are arranged on the side of each abutting strip away from the third piston plate, the contraction arms are fixedly connected to the bottom of the moving box, the inner wall bottom end of the contraction arms is fixedly connected with an abutting rod, and the bottom of the contraction arms is fixedly connected with an abutting arc block.

7. The cable with lightning protection device according to claim 1, characterized in that: The cooling mechanism comprises a cooling arc box, the cooling arc box is fixedly connected to the bottom of the mounting plate, the bottom of the cooling arc box abuts against the outer wall of the cable, and the cooling arc box is fixedly connected with the moving box through a pipeline.

8. A cable with lightning protection according to claim 7, characterized in that: The inner wall of the cooling arc box is also slidably connected with a fourth piston plate, and a plurality of air ports are formed in the right end of the cooling arc box.

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