A power cable with high voltage resistance and corrosion resistance

Abstract

This invention relates to a power cable with high-voltage resistance and corrosion resistance, belonging to the field of power cable technology. It includes an outer jacket with several overlapping support rings on its inner side. These support rings are inserted into the inner side of the outer jacket and sleeved onto the outer side of the inner jacket. The inner jacket has four bearing blocks arranged in a ring array on its inner side, with a receiving space between each pair of bearing blocks. This invention solves the problem that power cables, when buried underground or even needing to be laid through lakebeds or seabeds, may encounter abnormally high voltage and corrosion, posing a significant challenge to the cable structure itself. Traditional laying methods sometimes involve burying pipes or constructing underground tunnels for line installation, resulting in high costs and low efficiency. In this invention, the cable can be directly laid in high-voltage, highly corrosive environments without the need for additional pipes or underground tunnels, thereby greatly reducing laying costs and improving laying efficiency.

Description

Technical Field

[0001] This invention belongs to the field of power cable technology, and specifically relates to a power cable with high voltage resistance and corrosion resistance. Background Technology

[0002] Cables are devices that transmit electricity and signals, with the cable wrapped in insulating material. Power cables are used to transmit and distribute electrical energy. Power cables are commonly used in urban underground power grids, power plant lead-out lines, internal power supply for industrial and mining enterprises, and underwater power transmission lines across rivers and seas.

[0003] When power cables are buried underground, some even need to be laid through lake bottoms or seabeds. This can expose the cables to abnormally high pressure and corrosion, posing a great challenge to the cable structure itself. Traditional laying methods sometimes involve burying pipes or setting up underground channels for line laying, which is costly and inefficient. Therefore, a power cable with high pressure resistance and corrosion resistance is proposed. Summary of the Invention

[0004] This invention provides a power cable with high voltage resistance and corrosion resistance. Its purpose is to solve the problem that when power cables are buried underground, or even need to be laid through lake bottoms or seabeds, the cables may be exposed to abnormal high voltage and corrosion, which poses a great challenge to the cable structure itself. Traditional laying methods sometimes involve burying pipes or setting up underground channels for line laying, which is costly and inefficient.

[0005] This invention provides a power cable with high voltage resistance and corrosion resistance, including an outer support cylinder. Several stacked support rings are arranged on the inner side of the outer support cylinder, and the support rings are inserted into the inner side of the outer support cylinder and sleeved on the outer side of an inner sleeve. Four bearing blocks are arranged in a circular array on the inner side of the inner sleeve. A receiving space is formed between every two adjacent bearing blocks. Two protective plates are arranged on the inner side of each receiving space, and a circular groove is formed between the two protective plates. A crescent-shaped block is installed on the outer side of each protective plate, and the crescent-shaped block abuts against the bearing block. A power transmission line is installed on the inner side of the circular groove.

[0006] An elastic arc plate two is provided at one end of the accommodating space near the inner sleeve. The elastic arc plate two abuts against the protective plate. The support rings are connected by steel wire ropes. Several evenly distributed zinc blocks are provided inside the support rings. A support column is provided at the center of the outer support cylinder. The bearing block surrounds the outside of the support column. The support column and the bearing block are connected by plug-in blocks. The support ring is made of ductile iron and is cylindrical. The height of the cylindrical shape is one-fifth of its inner diameter. The outer support cylinder is made of polytetrafluoroethylene.

[0007] Furthermore, an anti-adhesion layer is sleeved on the outer side of the outer support cylinder. The anti-adhesion layer is made of long strips spliced ​​together, and the smoothness Ra of the outer side of the anti-adhesion layer is ≤0.6.

[0008] By adopting the above scheme, the anti-attachment layer is generally installed when the cable passes through rivers, lakes and oceans. The smooth outer side of the anti-attachment layer is not conducive to the attachment of plants and animals, including aquatic plants, shellfish and barnacles. After the plants and animals attach, they can be removed by removing part of the anti-attachment layer strips, and then some anti-attachment layer strips can be added.

[0009] Furthermore, the plug-in block is disposed on the side of the bearing block facing the support column, and an expansion groove is provided at the end of the plug-in block away from the bearing block. Several plug-in grooves are evenly provided on the support column, and an expansion column is disposed in the plug-in groove, and the expansion column is plugged into the expansion groove.

[0010] By adopting the above scheme, after the expansion column is inserted into the plug block, the plug block will press the plug block to separate to both sides, thereby locking it tightly in the inner cavity of the plug slot.

[0011] Furthermore, locking slots are provided on both sides of the inner wall of the insertion slot, and a connecting protrusion is provided on each side of the insertion block. The connecting protrusion and the locking slot can be movably inserted into each other.

[0012] By adopting the above scheme, after the expansion column is inserted into the plug block, the plug block will press the plug block to separate to both sides, causing the connecting protrusion to be squeezed into the locking groove, thereby achieving the purpose of locking and fixing the bearing block stably around the support column.

[0013] Furthermore, the side of the guard plate facing the crescent block is provided with several magnetic strips, and each guard plate is provided with a collision block. Two collision blocks are in contact with each other, and the material of the collision blocks is a high-carbon high-chromium alloy.

[0014] By adopting the above scheme, the magnetic strip can hold the crescent block, and the crescent block and the protective plate cooperate to facilitate the installation of the crescent block and the protective plate in the receiving space. At the same time, the crescent block indirectly connects the protective plate and the load-bearing block. The cooperation between the protective plate and the crescent block separates the two load-bearing blocks, ensuring the maintenance of the structural shape of the receiving space, thereby effectively protecting the power transmission line. The two collision blocks will have direct collision and violent compression, which can effectively reduce violent collisions between the protective plates, improve the strength of the structure, and extend the service life.

[0015] Furthermore, an elastic arc plate is installed on the outer side of the second elastic arc plate, and the first elastic arc plate is installed on the inner side of the accommodating space.

[0016] By adopting the above scheme, when the inner sleeve is squeezed, impacted, and collided with the receiving space and power transmission line, the first elastic arc plate squeezes the second elastic arc plate and together with the second elastic arc plate, transmits the impact to the bearing block, thereby changing the direction of the impact force and avoiding direct impact on the guard plate and power transmission line. When the two bearing blocks are squeezed and approach each other, the pressure is dispersed outward by the second elastic arc plate and the first elastic arc plate, which is opposite to the pressure direction of the outside towards the connecting block, thereby offsetting part of the force and achieving balance.

[0017] Furthermore, four connecting blocks are evenly arranged on the inner wall of the inner sleeve, and the connecting blocks correspond one-to-one with the elastic arc plates. A pressing block is arranged between the connecting block and the corresponding elastic arc plate, and the outer peripheral surface of the pressing block is concave.

[0018] By adopting the above scheme, the connecting block and the pressing block connect the elastic arc plate to the inner sleeve.

[0019] Furthermore, each of the support blocks has three pre-drilled connection slots, through which the connecting rope passes, and the support blocks are connected to each other by the connecting rope.

[0020] By adopting the above scheme, the connecting rope connects the load-bearing blocks in series, allowing the load-bearing blocks to be installed on the inner side of the support ring.

[0021] Furthermore, a compression cavity is formed between the elastic arc plate and the bearing block, and the inner cavity of the compression cavity accommodates the airbag.

[0022] By adopting the above scheme, when the elastic arc plate vibrates, the airbag will be subjected to compression and impact, and the airbag can reduce the impact energy during the contraction and expansion process.

[0023] Furthermore, the outer support cylinders are connected by a connecting sleeve. One end of the outer support cylinder inserted into the connecting sleeve is provided with an assembly seat. An elastic ring is sandwiched between the two assembly seats. The elastic ring is made of rubber. A sealing ring one is provided at each end of the inner side of the connecting sleeve. A sealing ring two is provided on the outer support cylinder. The sealing ring two and the sealing ring one abut against each other.

[0024] A filler is provided in the middle section of the inner side of the connecting sleeve, and a sealing sleeve is sleeved on the outer side of the elastic ring. The sealing sleeve abuts against the outer side of the filler, and the cross-sectional shape of the filler is Y-shaped.

[0025] By adopting the above scheme, the connecting sleeve connects the two outer support cylinders to each other. The elasticity of the elastic ring allows the outer support cylinders to bend at a certain angle, thereby enabling the cable to turn. After the connecting sleeve is squeezed, the filler compresses the sealing sleeve, making the sealing sleeve fit more tightly against the outer periphery of the mounting base, thereby increasing the airtightness between the bearing blocks. The elastic ring squeezes the two mounting bases, causing the sealing ring two on the mounting base to squeeze the sealing ring one, thus sealing the gap between the two.

[0026] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects:

[0027] 1. In this invention, the outer support cylinder transmits the pressure to the support ring, causing slight deformation of the support ring and squeezing the bearing block. The bearing block then transmits the pressure to the support column. The forces transmitted from the four bearing blocks to the support column form a resultant force. When the resultant force is not zero, it is transmitted through the bearing blocks to the structure supporting the bearing blocks. The structure formed by the bearing blocks and support columns ensures that the deformation of the cavity is very small, with some forces being offset or transferred from one side to the other, maintaining the structural stability of the cavity and thus effectively protecting the power transmission line. The semi-circular block and the protective plate work together to facilitate their installation in the cavity. The semi-circular block indirectly connects the protective plate to the bearing block, and the cooperation between the protective plate and the semi-circular block separates the two bearing blocks, ensuring the maintenance of the shape of the cavity structure and thus effectively protecting the power transmission line. The two collision blocks will directly collide and violently squeeze, effectively reducing violent collisions between the protective plates, improving the structural strength, and extending the service life.

[0028] 2. In this invention, by using an anti-attachment layer, the attachment of plants and animals, including aquatic plants, shellfish, and barnacles, can be reduced. After the plants and animals attach, the attachment can be removed by removing part of the anti-attachment layer strips, and then the anti-attachment layer strips can be replenished.

[0029] 3. In this invention, the external support cylinder resists corrosion, keeping the internal environment of the cable dry and stable. The zinc block can replace the support ring in resisting corrosion, thus ensuring the integrity and stability of the support ring structure.

[0030] 4. In summary, this allows the cable to be directly laid in high-pressure and highly corrosive environments without the need for additional burial of pipes or the construction of underground channels, thereby greatly reducing the laying cost and improving the laying efficiency.

[0031] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention;

[0034] Figure 2 For the present invention Figure 1 A partially enlarged structural diagram of part A in the middle;

[0035] Figure 3 For the present invention Figure 1 A partially enlarged structural diagram of section B;

[0036] Figure 4 This is a schematic diagram showing the connection relationship between the connecting sleeve and the outer support cylinder of the present invention;

[0037] Figure 5 For the present invention Figure 4 A magnified schematic diagram of part C in the middle section;

[0038] Figure 6 For the present invention Figure 4 A magnified schematic diagram of part D in the middle section.

[0039] Reference numerals: Outer support cylinder—1, support ring—2, inner sleeve—3, anti-adhesion layer—4, power transmission line—5, elastic arc plate one—6, guard plate—7, elastic arc plate two—8, connecting groove—9, connecting rope—10, support column—12, connecting block—13, crescent block—14, wire rope—15, zinc block—16, connecting sleeve—17, bearing block—18, elastic ring—19, expansion groove—20, expansion column—21, connecting protrusion—22, locking groove—23, insertion groove—24, extrusion block—25, magnet strip—26, collision block—27, airbag—28, sealing ring one—29, sealing ring two—30, insertion block—31, assembly seat—32, sealing sleeve—33, filler—34. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages 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. The same reference numerals in the drawings represent the same components. It should be noted that 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 described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] like Figure 1-6As shown, the present invention proposes a power cable with high voltage resistance and corrosion resistance, including an outer support cylinder 1. Several stacked support rings 2 are arranged on the inner side of the outer support cylinder 1. The support rings 2 are inserted into the inner side of the outer support cylinder 1 and sleeved on the outer side of the inner sleeve 3. Four bearing blocks 18 are arranged in a ring on the inner side of the inner sleeve 3. A receiving space is formed between every two adjacent bearing blocks 18. Two protective plates 7 are arranged on the inner side of each receiving space. A circular groove is formed between the two protective plates 7. A crescent block 14 is installed on the outer side of each protective plate 7. The crescent block 14 abuts against the bearing block 18. A power transmission line 5 is installed on the inner side of the circular groove.

[0042] An elastic arc plate 2 8 is provided at one end of the accommodating space near the inner sleeve 3. The elastic arc plate 2 8 abuts against the guard plate 7. The support rings 2 are connected by steel wire ropes 15. Several evenly distributed zinc blocks 16 are provided inside the support rings 2. A support column 12 is provided at the center of the outer support cylinder 1. The bearing block 18 surrounds the outside of the support column 12. The support column 12 and the bearing block 18 are connected by plug-in blocks 31. The material of the support ring 2 is ductile iron. The support ring 2 is cylindrical. The height of the cylindrical shape is one-fifth of its inner diameter. The material of the outer support cylinder 1 is polytetrafluoroethylene.

[0043] An anti-adhesion layer 4 is sleeved on the outer side of the outer support cylinder 1. The anti-adhesion layer 4 is made of long strips spliced ​​together. The smoothness Ra of the outer side of the anti-adhesion layer 4 is ≤0.6. The anti-adhesion layer 4 is generally installed when the cable passes through rivers, lakes and oceans. The smoothness of the outer side of the anti-adhesion layer 4 is not conducive to the attachment of plants and animals, including aquatic plants, shellfish and barnacles. After the plants and animals attach, they can be removed by removing part of the long strips of the anti-adhesion layer 4. Then, some of the long strips of the anti-adhesion layer 4 can be added.

[0044] The plug-in block 31 is disposed on the side of the bearing block 18 facing the support column 12. An expansion groove 20 is provided at the end of the plug-in block 31 away from the bearing block 18. Several plug-in grooves 24 are evenly provided on the support column 12. An expansion column 21 is disposed in the plug-in groove 24. The expansion column 21 is plugged into the expansion groove 20. After the expansion column 21 is inserted into the plug-in block 31, the plug-in block 31 will press the plug-in block 31 to separate to both sides, thereby tightly locking it in the inner cavity of the plug-in groove 24.

[0045] Locking grooves 23 are provided on both sides of the inner wall of the insertion groove 24. A connecting protrusion 22 is provided on each side of the insertion block 31. The connecting protrusion 22 and the locking groove 23 can be movably inserted. After the expansion column 21 is inserted into the insertion block 31, the insertion block 31 will press the insertion block 31 to separate to both sides, so that the connecting protrusion 22 is squeezed into the locking groove 23, achieving the purpose of locking, so that the bearing block 18 is stably fixed around the support column 12.

[0046] The protective plate 7 has several magnetic strips 26 on the side facing the crescent block 14. Each protective plate 7 has a collision block 27, and two collision blocks 27 are in contact with each other. The collision blocks 27 are made of high-carbon high-chromium alloy. The magnetic strips 26 can hold the crescent block 14. The crescent block 14 and the protective plate 7 cooperate to facilitate the installation of the crescent block 14 and the protective plate 7 in the accommodating space. At the same time, the crescent block 14 indirectly connects the protective plate 7 to the bearing block 18. The cooperation of the protective plate 7 and the crescent block 14 separates the two bearing blocks 18, ensuring the maintenance of the structural shape of the accommodating space, thereby effectively protecting the power transmission line 5. The two collision blocks 27 will directly collide and violently squeeze, which can effectively reduce violent collisions between the protective plates 7, improve the strength of the structure, and extend the service life.

[0047] Elastic arc plate 6 is installed on the outer side of elastic arc plate 2 8. Elastic arc plate 6 is installed on the inner side of the accommodating space. When the inner sleeve 3 is squeezed, impacted, or collided with the accommodating space and the power transmission line 5, elastic arc plate 6 squeezes elastic arc plate 2 8 and together with elastic arc plate 2 8, transmits the impact to the bearing block 18, thereby changing the direction of the impact force and avoiding direct impact on the guard plate 7 and the power transmission line 5. When the two bearing blocks 18 are squeezed and approach each other, the pressure is dispersed outward by elastic arc plate 2 8 and elastic arc plate 6, which is opposite to the pressure direction of the outside towards the connecting block 13, thereby offsetting part of the force and achieving balance.

[0048] The inner wall of the inner sleeve 3 is uniformly provided with four connecting blocks 13, each corresponding to an elastic arc plate 6. A pressing block 25 is provided between the connecting block 13 and the corresponding elastic arc plate 6. The outer peripheral surface of the pressing block 25 is concave. The connecting block 13 and the pressing block 25 connect the elastic arc plate 6 to the inner sleeve 3.

[0049] Each of the bearing blocks 18 has three pre-drilled connecting slots 9. The connecting ropes 10 pass through the connecting slots 9, and the bearing blocks 18 are connected to each other by the connecting ropes 10. The connecting ropes 10 connect the bearing blocks 18 in series, so that the bearing blocks 18 are installed on the inner side of the support ring 2.

[0050] A compression cavity is formed between the elastic arc plate 6 and the bearing block 18. The inner cavity of the compression cavity contains an airbag 28. When the elastic arc plate 6 vibrates, the airbag 28 will be subjected to compression impact. The airbag 28 can reduce the impact energy during the contraction and expansion process.

[0051] The outer support cylinders 1 are connected by a connecting sleeve 17. One end of the outer support cylinder 1 inserted into the connecting sleeve 17 is provided with an assembly seat 32. An elastic ring 19 is sandwiched between the two assembly seats 32. The elastic ring 19 is made of rubber. A sealing ring 29 is provided at each end of the inner side of the connecting sleeve 17. A sealing ring 30 is provided on the outer support cylinder 1. The sealing ring 30 and the sealing ring 29 abut against each other.

[0052] A filler 34 is provided in the middle section of the inner side of the connecting sleeve 17. A sealing sleeve 33 is sleeved on the outer side of the elastic ring 19. The sealing sleeve 33 abuts against the outer side of the filler 34. The cross-sectional shape of the filler 34 is Y-shaped. The connecting sleeve 17 connects the two outer support cylinders 1 to each other. The elasticity of the elastic ring 19 allows the outer support cylinder 1 to bend at a certain angle, thereby enabling the cable to turn. When the connecting sleeve 17 is squeezed, the filler 34 presses the sealing sleeve 33, making the sealing sleeve 33 fit more tightly against the outer periphery of the mounting base 32, thereby increasing the airtightness between the bearing blocks 18. The elastic ring 19 squeezes the two mounting bases 32, causing the sealing ring 20 on the mounting base 32 to squeeze the sealing ring 29, thus sealing the gap between them.

[0053] The specific implementation method is as follows: First, insert the plug block 31 into the plug slot 24 to lock the bearing block 18, so that the bearing block 18 is installed on the support column 12. Then, pass the power transmission line 5 through the receiving space. Then, insert the guard plate 7, the crescent block 14 and the second elastic arc plate 8 around the power transmission line 5 in sequence, so that the power transmission line 5 is clamped into the receiving space. Then, put the inner sleeve 3 on the outside of the four bearing blocks 18, so that the first elastic arc plate 6 is inserted into the receiving space. By the first elastic arc plate 6 pressing the second elastic arc plate 8, the crescent block 14 and the guard plate 7 are locked in the receiving space. Then, put the support ring 2 on the outside of the inner sleeve 3, and then put the outer support cylinder 1 on the outside of the support ring 2.

[0054] The protective plate 7 and the crescent block 14 work together to separate the two bearing blocks 18, ensuring the maintenance of the shape of the accommodating space structure, thereby effectively protecting the power transmission line 5; the two collision blocks 27 will directly collide and be violently squeezed, which can effectively reduce the violent collision between the protective plates 7, improve the strength of the structure, and extend the service life. When the cable is laid underground, in rivers, lakes, and at the bottom of the ocean, the outer support cylinder 1 will be compressed by water and soil. The outer support cylinder 1 will transfer this pressure to the support ring 2. The support ring 2 will deform slightly and squeeze the bearing block 18. The bearing block 18 will transfer the pressure to the support column 12. The force transmitted from the four bearing blocks 18 to the support column 12 forms a resultant force. When the resultant force is not zero, it will be transmitted through the bearing blocks 18 to the structure supporting the bearing blocks 18. The structure formed by the bearing blocks 18 and the support column 12 can ensure that the deformation of the accommodating space cavity is very small.

[0055] When the elastic arc plate 16 is compressed within the inner sleeve 3, and the impact and collision are directed towards the receiving space and the power transmission line 5, the elastic arc plate 16 compresses the elastic arc plate 28 and together with the elastic arc plate 28, transmits the impact to the bearing block 18, thereby changing the direction of the impact force and preventing the impact from directly impacting the guard plate 7 and the power transmission line 5. When the two bearing blocks 18 are compressed and approach each other, the pressure is dispersed outward through the elastic arc plate 28 and the elastic arc plate 16, which is opposite to the pressure direction of the outside towards the connecting block 13, thereby offsetting part of the force and achieving balance.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A power cable with high voltage resistance and corrosion resistance, comprising an outer support cylinder (1), characterized in that, The outer support cylinder (1) has several stacked support rings (2) on its inner side. The support rings (2) are inserted into the inner side of the outer support cylinder (1) and sleeved on the outer side of the inner sleeve (3). The inner sleeve (3) has four bearing blocks (18) arranged in a ring on its inner side. A receiving space is formed between every two adjacent bearing blocks (18). Two guard plates (7) are arranged on the inner side of each receiving space. A circular groove is formed between the two guard plates (7). A crescent block (14) is installed on the outer side of each guard plate (7). The crescent block (14) abuts against the bearing block (18). A power transmission line (5) is installed on the inner side of the circular groove. An elastic arc plate 2 (8) is provided at one end of the accommodating space near the inner sleeve (3). The elastic arc plate 2 (8) and the guard plate (7) abut against each other. The support rings (2) are connected by steel wire rope (15). Several evenly distributed zinc blocks (16) are provided inside the support ring (2). A support column (12) is provided at the center of the outer support cylinder (1). The bearing block (18) surrounds the outside of the support column (12). The support column (12) and the bearing block (18) are connected by plug-in block (31). The material of the support ring (2) is ductile iron. The support ring (2) is cylindrical. The height of the cylindrical shape is one-fifth of its inner diameter. The plug-in block (31) has an expansion groove (20) at one end away from the bearing block (18). The support column (12) has several plug-in grooves (24) evenly distributed. An expansion column (21) is provided in the plug-in groove (24), and the expansion column (21) is plugged into the expansion groove (20). Locking grooves (23) are provided on both sides of the inner wall of the plug-in groove (24). A connecting protrusion (22) is provided on each side of the plug-in block (31), and the connecting protrusion (22) is movably plugged into the locking groove (23). Several magnetic strips (26) are provided on the side of the guard plate (7) facing the crescent block (14). Each guard plate (7) is provided with a collision block (27). Two collision blocks (27) are in contact with each other. The material of the collision block (27) is a high-carbon high-chromium alloy. Elastic arc plate one (6) is installed on the outside of the elastic arc plate two (8). The elastic arc plate one (6) is installed on the inside of the accommodating space. A compression cavity is formed between the elastic arc plate one (6) and the bearing block (18). The inner cavity of the compression cavity accommodates the airbag (28).

2. The power cable with high voltage resistance and corrosion resistance according to claim 1, characterized in that: The outer support cylinder (1) is fitted with an anti-adhesion layer (4), which is made of long strips spliced ​​together.

3. The power cable with high voltage resistance and corrosion resistance according to claim 1, characterized in that: The inner wall of the inner sleeve (3) is uniformly provided with four connecting blocks (13), and the connecting blocks (13) correspond one-to-one with the elastic arc plate (6). A pressing block (25) is provided between the connecting blocks (13) and the corresponding elastic arc plate (6).

4. A power cable with high voltage resistance and corrosion resistance according to claim 1, characterized in that: Each of the support blocks (18) has three pre-drilled connection slots (9), and the support blocks (18) are connected by a connecting rope (10) that passes through the connection slots (9).

5. A power cable with high voltage resistance and corrosion resistance according to claim 1, characterized in that: The outer support cylinders (1) are connected by a connecting sleeve (17). One end of the outer support cylinder (1) inserted into the connecting sleeve (17) is provided with an assembly seat (32). An elastic ring (19) is sandwiched between the two assembly seats (32). The elastic ring (19) is made of rubber. A sealing ring one (29) is provided at each end of the inner side of the connecting sleeve (17). A sealing ring two (30) is provided on the outer support cylinder (1). The sealing ring two (30) and the sealing ring one (29) abut against each other. A filler (34) is provided in the middle section of the inner side of the connecting sleeve (17). A sealing sleeve (33) is sleeved on the outer side of the elastic ring (19). The sealing sleeve (33) abuts against the outer side of the filler (34). The cross-sectional shape of the filler (34) is Y-shaped.

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