Crosslinked polyethylene cable used in high-pressure and high-temperature environment
By introducing a central reinforcing tube, a pressure-resistant tube, and an active cooling system into the cable, the problem of cable damage under high temperature and high pressure environments is solved, and the cable achieves stable power supply and pressure resistance under high pressure and high temperature environments.
Patent Information
- Application Number
- CN202511819387.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-03-03
AI Technical Summary
Existing cross-linked polyethylene cables are easily damaged in high-temperature and high-pressure environments, posing risks of cable breakage and thermal breakdown, making it difficult to meet continuous power supply requirements.
The cable strength is improved by using a central reinforcing tube and a pressure-resistant tube. An active cooling system is used to cool the cable with coolant. The connection stability is enhanced by protective sleeves and connecting components, including protective covers and snap rings, to improve pressure resistance.
It improves the cable's pressure resistance and connection stability under high pressure and high temperature environments, reduces the risk of cable aging and damage, and ensures normal power supply under high temperature and high pressure environments.
Smart Images
Figure CN121601314A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cross-linked polyethylene cable technology, and more specifically, to a cross-linked polyethylene cable for use in high-pressure and high-temperature environments. Background Technology
[0002] Cross-linked polyethylene (XLPE) insulated cables are suitable for applications such as power distribution networks. They offer unparalleled advantages over PVC insulated cables, including simple structure, light weight, good heat resistance, strong load capacity, non-melting, chemical corrosion resistance, and high mechanical strength. XLPE insulated cables are manufactured using chemical or physical methods to transform the linear molecular structure of the polyethylene insulation into a predominantly network molecular structure, converting thermoplastic polyethylene into thermosetting cross-linked polyethylene. This significantly improves its heat resistance and mechanical properties, reduces its shrinkage, prevents it from melting when heated, and maintains excellent electrical properties.
[0003] Current cross-linked polyethylene (XLPE) cables possess a certain degree of heat resistance, making them suitable for use in environments with specific temperatures. However, their primary protection relies on the cable's insulation material—polyethylene—and a metal armor layer. Some cables also incorporate flame retardants for passive flame protection. The metal armor layer provides compressive strength protection, but its high thermal conductivity means that XLPE cables sometimes need to be used in high-temperature, high-pressure environments, such as high-pressure oil wells. Given the current passive compressive strength and heat resistance of these cables, it is difficult to meet the demands of continuous high-temperature, high-pressure power supply. Under external environmental pressure, the cables are prone to damage, further increasing the risk of thermal breakdown and affecting normal power supply. Summary of the Invention
[0004] This invention proposes a cross-linked polyethylene cable for high-pressure and high-temperature environments, which solves the problem that existing cables rely on their own material for passive pressure resistance and heat resistance, resulting in a significant risk of damage.
[0005] The technical solution of the present invention is as follows: A cross-linked polyethylene cable for high-pressure and high-temperature environments includes a cable segment comprising a conductor, a shielding layer, an inner sheath, an armor layer, and an outer sheath. The shielding layer wraps around the outside of the conductor, the inner sheath is located outside the shielding layer, and the armor layer and the outer sheath sequentially wrap around the outside of the inner sheath. The cable segment also includes a connecting assembly and an active cooling system. A protective tube, which is wrapped around the outside of the shielding layer, and a filler is provided between the protective tube and the inner sheath; A pressure-resistant protection assembly is used to provide internal and external pressure protection for the cable segment, and the pressure-resistant protection assembly includes an external pressure-resistant component and an internal pressure-resistant component; The external pressure-resistant component is disposed outside the outer sheath and is used to provide pressure-resistant protection for the outside of the cable segment. The external pressure-resistant component includes: A protective sleeve, which wraps around the outside of the outer sheath; The reinforcing ribs are provided inside the protective sleeve, which has a hollow structure. The reinforcing ribs are fixedly connected to the inside of the protective sleeve and are arranged in a continuous wavy bend inside the protective sleeve. The inner pressure-resistant component is disposed inside the inner sheath and is used to provide pressure-resistant protection for the inside of the cable segment. The inner pressure-resistant component includes: A central reinforcing tube is disposed on the inner side of the inner sheath and is located at the center of the filler. A pressure-resistant tube is disposed inside the inner sheath, and the filler is disposed between the pressure-resistant tube and the inner sheath. The pressure-resistant tube and the protective tube are arranged alternately. The connecting components are disposed at both ends of the cable segments for electrically connecting two adjacent cable segments, and the connecting components include: A connector, which is fixedly connected to one end of the cable segment; A connector is fixedly connected to the other end of the cable segment, and the connector head and the connector are plugged into each other. A plug, which is installed inside the connector and is electrically connected to one end of the conductor; A socket is installed inside the connector, the socket is electrically connected to the other end of the conductor, and the plug is inserted into the socket. A snap-fit ring, wherein the snap-fit ring is a splicing structure, and the snap-fit ring is detachably disposed on the outside of the water storage ring for connecting the connector and the connector seat; The active cooling system is used to deliver coolant into the pressure-resistant protection component to provide heat protection for the cable segment. The active cooling system includes: Cold water tank; A delivery pump, wherein the pump's inlet is connected to the cold water tank; A connecting pipe, wherein the pressure-resistant pipe is connected to the central reinforcing pipe through the connecting pipe; Two water storage rings are provided, and the two water storage rings are fixedly connected to both ends of the cable segment. The two water storage rings are located outside the connector and the connector seat, respectively. The water storage rings are connected to the protective sleeve through the water supply pipe. The two water storage rings at the close ends of two adjacent cable segments are connected by a connecting piece. The delivery pump is connected to the water storage ring at the end. The pressure-resistant pipe is connected to the water storage ring. The connecting element includes: A jacking pipe is fixedly connected to a water storage ring at one end of the cable segment, and a communication port matching the jacking pipe is opened on the water storage ring at the other end of the cable segment. The sealing plate is fixedly connected to the inside of the water storage ring. The sealing plate is connected to the fixed plate by a compression spring and a telescopic rod to seal the communication port. The end of the top pipe is fixedly connected to a top rod for pushing the sealing plate to move. A baffle is provided, and a support plate is fixedly connected inside the jacking pipe. The baffle is connected to the support plate by a compression spring and a telescopic rod, and is used to close the jacking pipe. A second push rod is fixedly connected to the closing plate to push the baffle to move.
[0006] To further enhance the pressure resistance of the water storage ring and the water delivery pipe, a protective cover is fixedly connected to the outside of the water storage ring, and the water delivery pipe is located inside the protective cover.
[0007] To improve the connection stability of the snap ring to the connector and the connector seat, a snap ring is fixedly connected to the outside of the protective cover, and a snap groove matching the snap ring is opened on the inner side of the snap ring.
[0008] To allow coolant to flow inside the protective sleeve, the reinforcing ribs are provided with multiple water passage holes.
[0009] The working principle and beneficial effects of this invention are as follows: 1. In this invention, the strength of the filler is improved by using a central reinforcing tube and a pressure-resistant tube. That is, the space near the conductor is filled with a high-strength tubular material to improve the overall strength and pressure resistance of the cable. The outer sheath is protected by a protective sleeve to provide pressure resistance and reduce damage to the cable outer sheath caused by external high-temperature substances or hard objects, ensuring the integrity of the cable and meeting the requirements for normal use of the cable in high-voltage environments.
[0010] 2. In this invention, the coolant in the cold water tank is delivered to the interior of the water storage ring, protective sleeve, central reinforcing tube and pressure-resistant tube by a delivery pump, so as to actively cool the cable, reduce cable aging caused by prolonged power supply and heating, and ensure normal power supply of the cable in high-temperature environment. In addition, the coolant in the protective sleeve and pressure-resistant tube can resist external pressure to a certain extent, further enhancing the cable's pressure resistance and making the cable suitable for use in high-pressure and high-temperature environment.
[0011] 3. In this invention, multiple cable segments are connected by connectors and connectors to adapt to power supply requirements of different lengths. The connectors and connectors are protected against pressure by water storage rings and protective covers. At the same time, the connection stability of the connectors and connectors is ensured by the snap-fit rings. Meanwhile, the coolant in the water storage ring can cool the connectors and connectors to ensure the stability and safety of the cable connection in high temperature and high pressure environments. Attached Figure Description
[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0013] Figure 1 This is a first-view structural diagram of the entire invention; Figure 2 This is a second-view structural schematic diagram of the entire invention; Figure 3 This is a schematic diagram of the structure of the water storage ring, protective cover, cable segment and connecting assembly of the present invention; Figure 4 This is a first-view structural schematic diagram of the water storage ring, connecting pipe, protective cover, and cable segment of the present invention. Figure 5 This is a second-view structural schematic diagram of the water storage ring, connecting pipe, protective cover, and cable segment of the present invention. Figure 6 This is a schematic diagram of the connecting pipe, water storage ring, water delivery pipe, and pressure-resistant protection component of the present invention. Figure 7 This is a schematic diagram of the structure of the water storage ring and the connecting component of the present invention; Figure 8 This is a schematic diagram of the structure of the jacking pipe, baffle, jacking rod 1, and support plate of the present invention; Figure 9 This is a schematic diagram of the structure of the water storage ring, the sealing plate, the fixing plate, and the second top rod of the present invention; Figure 10 For the present invention Figure 5 A magnified schematic diagram of the structure at point A in the middle.
[0014] In the picture: 101. Conductor; 102. Shielding layer; 103. Inner sheath; 104. Armor layer; 105. Outer sheath; 106. Protective tube; 201. Protective sleeve; 202. Reinforcing rib; 301. Central reinforcing tube; 302. Pressure-resistant tube; 401. Cold water tank; 402. Transfer pump; 403. Connecting pipe; 404. Water storage ring; 405. Water delivery pipe; 406. Connecting pipe; 407. Protective cover; 501. Jacking pipe; 502. Sealing plate; 503. Baffle; 504. Fixing plate; 505. Jacking rod one; 506. Support plate; 507. Jacking rod two; 508. Inlet pipe; 509. Outlet pipe; 601. Connector; 602. Connector base; 603. Plug; 604. Socket; 605. Snap ring; 606. Half ring. Detailed Implementation
[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0016] like Figures 1 to 10 As shown, this embodiment proposes a cross-linked polyethylene cable for high-pressure and high-temperature environments, including a cable segment. The cable segment includes a conductor 101, a shielding layer 102, an inner sheath 103, an armor layer 104, and an outer sheath 105. The shielding layer 102 wraps around the conductor 101 to shield and protect the conductor 101, effectively isolating electromagnetic noise and preventing external electromagnetic interference from affecting the normal operation of the equipment. The inner sheath 103 is located outside the shielding layer 102. The armor layer 104 and the outer sheath 105 are sequentially wrapped around the outer side of the inner sheath 103. The cable segment also includes a connecting component and an active cooling system. The cable segment also includes a protective tube 106 and a pressure-resistant protective component.
[0017] like Figure 4 , Figure 5 and Figure 10 As shown, the protective tube 106 is wrapped around the outside of the shielding layer 102. A filler is provided between the protective tube 106 and the inner sheath 103. The filler can be mineral insulating filler, buffer filler, fireproof filler, etc., which has the functions of fireproofing, heat insulation and mechanical protection, provides support, protection and reinforcement of the cable structure, ensures the roundness of the cable, and can also improve the cable's anti-sway and anti-tensile performance.
[0018] like Figures 1 to 10As shown, the pressure-resistant protection assembly is used to provide internal and external pressure protection for the cable segment. The assembly includes an outer pressure-resistant component and an inner pressure-resistant component. The outer pressure-resistant component is located outside the outer sheath 105 and provides external pressure protection for the cable segment. It includes a protective sleeve 201 and reinforcing ribs 202. The protective sleeve 201 is hollow and wraps around the outer sheath 105. The reinforcing ribs 202 are fixedly connected inside the protective sleeve 201 and are arranged in a continuous wavy shape inside the sleeve. Multiple water passage holes are provided on the reinforcing ribs 202. The inner pressure-resistant component is located inside the inner sheath 103 and provides internal pressure protection for the cable segment. It includes a central reinforcing tube 301 and a pressure-resistant tube 302. The central reinforcing tube 301 is located inside the inner sheath 103. The reinforcing tube 301 is located at the center of the filler, and the pressure-resistant tube 302 is set inside the inner sheath 103. The pressure-resistant tube 302 and the inner sheath 103 are filled with filler. The pressure-resistant tube 302 and the protective tube 106 are staggered. The protective sleeve 201 provides overall protection to the outside of the outer sheath 105, reducing the damage to the outer sheath 105 under high temperature environment. The reinforcing rib 202 and the side wall of the protective sleeve 201 form a continuous triangle. The triangle has stability, thereby further improving the pressure resistance performance of the protective sleeve 201 for the cable. The central reinforcing tube 301 and the pressure-resistant tube 302 can be metal tubes, which can improve the internal strength of the inner sheath 103, support the filler and conductor 101, and further improve the pressure resistance performance of the cable, reducing the deformation of the cable under high pressure environment and the damage to the conductor 101 and the insulation.
[0019] like Figures 1 to 10As shown, the active cooling system is used to deliver coolant to the inside of the pressure-resistant protection component to provide heat protection for the cable segment. The active cooling system includes a cold water tank 401, a delivery pump 402, a connecting pipe 403, and a water storage ring 404. The pump inlet of the delivery pump 402 is connected to the cold water tank 401. The pressure-resistant pipe 302 is connected to the central reinforcing pipe 301 through the connecting pipe 403. The connecting pipe 403 is located at the end of the cable segment, and the filler is provided with space to place the connecting pipe 403. Two water storage rings 404 are provided, and the two water storage rings 404 are fixedly connected to both ends of the cable segment. The two water storage rings 404 are located outside the connector 601 and the connector 602, respectively. The water storage rings 404 are connected to the protective sleeve 201 through a water supply pipe 405. The two adjacent water storage rings 404 are connected to the protective sleeve 201. Two water storage rings 404 at one end of a cable segment are connected by a connecting component. A delivery pump 402 is connected to the water storage ring 404 at the end. A pressure-resistant pipe 302 is connected to the water storage ring 404. The end of the pressure-resistant pipe 302 is connected to the water storage ring 404 via a connecting pipe 406. A connecting hole for the connecting pipe 406 to pass through is provided on the connector 601. The connecting component includes a top pipe 501, a sealing plate 502, and a baffle 503. The top pipe 501 is fixedly connected to the water storage ring 404 at one end of the cable segment. A connecting port matching the top pipe 501 is provided on the water storage ring 404 at the other end of the cable segment. A fixing plate 504 is fixedly connected inside the water storage ring 404. The sealing plate 502 is connected to the fixing plate 504 via a compression spring and a telescopic rod. The jacking pipe 501 is used to seal the connection port. A first jacking rod 505 is fixedly connected to the end of the jacking pipe 501 to push the sealing plate 502 to move. A support plate 506 is fixedly connected inside the jacking pipe 501. A baffle 503 is connected to the support plate 506 via a compression spring and a telescopic rod to seal the jacking pipe 501. A second jacking rod 507 is fixedly connected to the sealing plate 502 to push the baffle 503 to move. To further improve the pressure resistance of the water storage ring 404 and the water delivery pipe 405, a protective cover 407 is fixedly connected to the outside of the water storage ring 404. The water delivery pipe 405 is located inside the protective cover 407. Under the action of the compression spring, the sealing plate 502 is pressed against the connection port to seal it. The jacking pipe 501 is stepped. The side furthest from the cable section is the smaller diameter section. Baffle 503 is located inside the larger diameter section of the jacking pipe 501. Under the action of the compression spring, baffle 503 is pressed between the two sections of the jacking pipe 501, sealing the smaller diameter section. When the two cable sections are connected close together, the jacking pipe 501 is inserted into the connecting port. The sealing plate 502 is pushed into the water storage ring 404 by the first jacking rod 505. Simultaneously, during the insertion of the jacking pipe 501 into the connecting port, the second jacking rod 507 pushes the baffle 503 into the larger diameter section of the jacking pipe 501, achieving communication between the jacking pipe 501 and the water storage ring 404. The jacking pipe 501 and the connecting port have a sealed sliding fit. The outlet of the delivery pump 402 is connected to the inlet pipe 508.The end of the inlet pipe 508 can be equipped with a top pipe 501, a top rod 505, and a baffle 503, which can be inserted into the water storage ring 404 located at the end. The cold water tank 401 is connected to an outlet pipe 509, the end of which can also be equipped with a top pipe 501, a top rod 505, and a baffle 503, which can be inserted into another connection port of the water storage ring 404 located at the end. The coolant in the cold water tank 401 is transported through the inlet pipe 508 to the water storage ring 404, the protective sleeve 201, the pressure-resistant pipe 302, and the central reinforcing pipe 301 by the delivery pump 402. The coolant actively cools the outside of the cable, adapting the cable to high-temperature environments. Under normal use, the coolant enters the water storage ring 404, protective sleeve 201, pressure-resistant tube 302, and central reinforcing tube 301, which can resist external pressure to a certain extent and further improve the cable's pressure resistance. The cold water tank 401 can be equipped with cooling equipment, or the cold water tank 401 can be placed inside a cold water bath, and tap water can be discharged into the cold water bath to cool the coolant inside the cold water tank 401, ensuring the cooling effect on the cable. The water storage ring 404 and protective cover 407 are located outside the connector 601 and connector 602, which can ensure the pressure resistance of the connector 601 and connector 602 and ensure the stability of the connection between cable segments.
[0020] like Figures 1 to 5As shown, the connecting components are located at both ends of the cable segment for electrical connection between two adjacent cable segments. The connecting components include a connector 601, a connector 602, a plug 603, a socket 604, and a snap-fit ring. The connector 601 is fixedly connected to one end of the cable segment, and the connector 602 is fixedly connected to the other end of the cable segment. The connector 601 and connector 602 are plugged into each other. The plug 603 is installed inside the connector 602 and is electrically connected to one end of the conductor 101. The socket 604 is installed inside the connector 601 and is electrically connected to the other end of the conductor 101. The plug 603 and socket 604 are plugged into each other. Both the plug 603 and socket 604 are made of metal. Both ends of the conductor 101 are fixedly connected to the plug 603 and socket 604 respectively to achieve electrical connection between the plug 603 and socket 604 and the conductor 101. The snap-fit ring is a spliced structure and is detachably installed on the outside of the water storage ring 404 for connection. The connector 601 and the connector 602 are connected. A retaining ring 605 is fixedly connected to the outside of the protective cover 407. The inner side of the retaining ring has a retaining groove that matches the retaining ring 605. The connector 601 is inserted into the inside of the connector 602, and the plug 603 is inserted into the inside of the socket 604 to realize the electrical connection between the two cable segments. The retaining ring includes two half rings 606, which are detachably connected by bolts. After the two cable segments are connected, the two half rings 606 are snapped onto the outside of the two protective covers 407 and fixedly connected by bolts. Thus, the retaining ring 605 and the protective cover 407 are connected through the retaining ring, and the connector 601 and the connector 602 are limited to ensure the stability of the connection between the two cable segments. The retaining ring wraps and blocks the gap between the two adjacent protective covers 407 and the two adjacent water storage rings 404, further improving the stability of the connection between the two cable segments and ensuring the compressive strength of the cable.
[0021] The working principle or usage process of this cross-linked polyethylene cable used in high-pressure and high-temperature environments is as follows: Select an appropriate number of cable segments according to power supply requirements, insert connector 601 into connector 602, insert plug 603 into socket 604 to achieve electrical connection between the two cable segments, press the two water storage rings 404 together, connect half ring 606 to the outside of the two protective covers 407, snap ring 605 into snap groove, and fix the two half rings 606 with bolts to ensure the stability of the connection between the two cable segments; During the connection process between connector 601 and connector 602, the top pipe 501 is inserted into the interior of the connecting port, the first top rod 505 pushes open the sealing plate 502, and the second top rod 507 pushes open the baffle 503, thereby connecting the connecting pipe 403 and the water storage ring 404. The top pipe 501 on the inlet pipe 508 and outlet pipe 509 is inserted into the connecting port on the end of the water storage ring 404. The coolant in the cold water tank 401 is transported to the interior of the water storage ring 404, protective cover 407, pressure-resistant pipe 302 and central reinforcing pipe 301 by the delivery pump 402, and flows back to the interior of the cold water tank 401 through the outlet pipe 509 for recycling, thereby cooling the cable. The cable's exterior is protected against pressure by the protective sleeve 201 and the reinforcing rib 202, while the cable's interior is protected against pressure by the central reinforcing tube 301, the pressure-resistant tube 302, and the armor layer 104, ensuring the cable's normal use under high pressure and high temperature environments.
[0022] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A cross-linked polyethylene cable for high-voltage and high-temperature environments, comprising a cable segment, the cable segment including a conductor (101), a shielding layer (102), an inner sheath (103), an armor layer (104), and an outer sheath (105), wherein the shielding layer (102) wraps around the outside of the conductor (101), the inner sheath (103) is located outside the shielding layer (102), and the armor layer (104) and the outer sheath (105) sequentially wrap around the outside of the inner sheath (103), characterized in that, It also includes connection components and an active cooling system, and the cable segment further includes: A protective tube (106) is wrapped around the outside of the shielding layer (102), and a filler is provided between the protective tube (106) and the inner sheath (103); A pressure-resistant protection assembly is used to provide internal and external pressure protection for the cable segment, and the pressure-resistant protection assembly includes an external pressure-resistant component and an internal pressure-resistant component; The external pressure-resistant component is disposed outside the outer sheath (105) and is used to provide pressure-resistant protection for the outside of the cable segment; The inner pressure-resistant component is disposed inside the inner sheath (103) and is used to provide pressure-resistant protection for the inside of the cable segment; The connecting components are disposed at both ends of the cable segment and are used to electrically connect two adjacent cable segments; The active cooling system is used to deliver coolant into the pressure-resistant protection component to provide heat protection for the cable segment.
2. The cross-linked polyethylene cable for high-voltage and high-temperature environments according to claim 1, characterized in that, The external pressure-resistant component includes: A protective sleeve (201) that wraps around the outside of the outer sheath (105); The reinforcing rib (202) is a hollow structure in the protective sleeve (201). The reinforcing rib (202) is fixedly connected inside the protective sleeve (201). The reinforcing rib (202) is continuously wavy and bent inside the protective sleeve (201).
3. A cross-linked polyethylene cable for high-voltage and high-temperature environments according to claim 2, characterized in that, The internal compression-resistant component includes: A central reinforcing tube (301) is disposed on the inner side of the inner sheath (103) and is located at the center of the filler. The pressure-resistant tube (302) is disposed inside the inner sheath (103), and the filler is disposed between the pressure-resistant tube (302) and the inner sheath (103). The pressure-resistant tube (302) and the protective tube (106) are arranged alternately.
4. A cross-linked polyethylene cable for high-pressure and high-temperature environments according to claim 3, characterized in that, The active cooling system includes: Cold water tank (401); A delivery pump (402) is connected to the cold water tank (401) via its pump inlet. A connecting pipe (403) is provided, through which the pressure-resistant pipe (302) is connected to the central reinforcing pipe (301); Two water storage rings (404) are provided. The two water storage rings (404) are fixedly connected to both ends of the cable segment. The water storage rings (404) are connected to the protective sleeve (201) through the water supply pipe (405). The two water storage rings (404) at the close ends of two adjacent cable segments are connected by a connecting piece. The delivery pump (402) is connected to the water storage ring (404) located at the end.
5. A cross-linked polyethylene cable for high-voltage and high-temperature environments according to claim 4, characterized in that, The connection component includes: A connector (601) is fixedly connected to one end of the cable segment; Connector (602), the connector (602) is fixedly connected to the other end of the cable segment, and the connector (601) and the connector (602) are plugged into each other; A plug (603) is installed inside the connector (602), and the plug (603) is electrically connected to one end of the conductor (101); A socket (604) is installed inside the connector (601), the socket (604) is electrically connected to the other end of the conductor (101), and the plug (603) is plugged into the socket (604); The snap-fit ring is a splicing structure and is detachably disposed on the outside of the water storage ring (404) for connecting the connector (601) and the connector (602).
6. A cross-linked polyethylene cable for high-voltage and high-temperature environments according to claim 5, characterized in that, The connecting element includes: A jacking pipe (501) is fixedly connected to the water storage ring (404) at one end of the cable segment, and a communication port matching the jacking pipe (501) is opened on the water storage ring (404) at the other end of the cable segment. The sealing plate (502) is fixedly connected to the inside of the water storage ring (404). The sealing plate (502) is connected to the fixed plate (504) by a compression spring and a telescopic rod to seal the communication port. The end of the top pipe (501) is fixedly connected to a top rod (505) for pushing the sealing plate (502) to move. A baffle (503) is fixedly connected to a support plate (506) inside the jacking pipe (501). The baffle (503) is connected to the support plate (506) by a compression spring and a telescopic rod, and is used to close the jacking pipe (501). A second push rod (507) for pushing the baffle (503) to move is fixedly connected to the closing plate (502).
7. A cross-linked polyethylene cable for high-voltage and high-temperature environments according to claim 6, characterized in that, The water storage ring (404) is fixedly connected to a protective cover (407), and the water delivery pipe (405) is located inside the protective cover (407).
8. A cross-linked polyethylene cable for high-voltage and high-temperature environments according to claim 7, characterized in that, The protective cover (407) is fixedly connected to the outside with a retaining ring (605), and the inner side of the retaining ring is provided with a retaining groove that matches the retaining ring (605).
9. A cross-linked polyethylene cable for high-voltage and high-temperature environments according to claim 8, characterized in that, The reinforcing rib (202) has multiple water passage holes.